diff options
Diffstat (limited to 'drivers/media/video')
37 files changed, 7287 insertions, 371 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig index 3b26fbd3e558..5ccb0aeca8cc 100644 --- a/drivers/media/video/Kconfig +++ b/drivers/media/video/Kconfig @@ -793,6 +793,14 @@ menuconfig V4L_USB_DRIVERS if V4L_USB_DRIVERS && USB +config USB_VIDEO_CLASS + tristate "USB Video Class (UVC)" + ---help--- + Support for the USB Video Class (UVC). Currently only video + input devices, such as webcams, are supported. + + For more information see: <http://linux-uvc.berlios.de/> + source "drivers/media/video/pvrusb2/Kconfig" source "drivers/media/video/em28xx/Kconfig" diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile index dff0d6abe917..ecbbfaab24d5 100644 --- a/drivers/media/video/Makefile +++ b/drivers/media/video/Makefile @@ -136,6 +136,8 @@ obj-$(CONFIG_SOC_CAMERA_MT9V022) += mt9v022.o obj-$(CONFIG_VIDEO_AU0828) += au0828/ +obj-$(CONFIG_USB_VIDEO_CLASS) += uvc/ + EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core EXTRA_CFLAGS += -Idrivers/media/dvb/frontends EXTRA_CFLAGS += -Idrivers/media/common/tuners diff --git a/drivers/media/video/au0828/au0828-cards.c b/drivers/media/video/au0828/au0828-cards.c index a2a6983444fa..898e12395e7c 100644 --- a/drivers/media/video/au0828/au0828-cards.c +++ b/drivers/media/video/au0828/au0828-cards.c @@ -77,8 +77,14 @@ static void hauppauge_eeprom(struct au0828_dev *dev, u8 *eeprom_data) /* Make sure we support the board model */ switch (tv.model) { + case 72000: /* WinTV-HVR950q (Retail, IR, ATSC/QAM */ case 72001: /* WinTV-HVR950q (Retail, IR, ATSC/QAM and basic analog video */ + case 72211: /* WinTV-HVR950q (OEM, IR, ATSC/QAM and basic analog video */ + case 72221: /* WinTV-HVR950q (OEM, IR, ATSC/QAM and basic analog video */ + case 72231: /* WinTV-HVR950q (OEM, IR, ATSC/QAM and basic analog video */ + case 72241: /* WinTV-HVR950q (OEM, No IR, ATSC/QAM and basic analog video */ case 72301: /* WinTV-HVR850 (Retail, IR, ATSC and basic analog video */ + case 72500: /* WinTV-HVR950q (OEM, No IR, ATSC/QAM */ break; default: printk(KERN_WARNING "%s: warning: " @@ -175,6 +181,18 @@ struct usb_device_id au0828_usb_id_table [] = { .driver_info = AU0828_BOARD_HAUPPAUGE_HVR850 }, { USB_DEVICE(0x0fe9, 0xd620), .driver_info = AU0828_BOARD_DVICO_FUSIONHDTV7 }, + { USB_DEVICE(0x2040, 0x7210), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, + { USB_DEVICE(0x2040, 0x7217), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, + { USB_DEVICE(0x2040, 0x721b), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, + { USB_DEVICE(0x2040, 0x721f), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, + { USB_DEVICE(0x2040, 0x7280), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, + { USB_DEVICE(0x0fd9, 0x0008), + .driver_info = AU0828_BOARD_HAUPPAUGE_HVR950Q }, { }, }; diff --git a/drivers/media/video/cx18/Kconfig b/drivers/media/video/cx18/Kconfig index 5f942690570c..9aefdc5ea79a 100644 --- a/drivers/media/video/cx18/Kconfig +++ b/drivers/media/video/cx18/Kconfig @@ -10,8 +10,8 @@ config VIDEO_CX18 select VIDEO_TVEEPROM select VIDEO_CX2341X select VIDEO_CS5345 - select DVB_S5H1409 - select MEDIA_TUNER_MXL5005S + select DVB_S5H1409 if !DVB_FE_CUSTOMISE + select MEDIA_TUNER_MXL5005S if !DVB_FE_CUSTOMISE ---help--- This is a video4linux driver for Conexant cx23418 based PCI combo video recorder devices. diff --git a/drivers/media/video/cx18/cx18-av-core.c b/drivers/media/video/cx18/cx18-av-core.c index 9a26751615c6..faca43eb940f 100644 --- a/drivers/media/video/cx18/cx18-av-core.c +++ b/drivers/media/video/cx18/cx18-av-core.c @@ -69,6 +69,58 @@ int cx18_av_and_or4(struct cx18 *cx, u16 addr, u32 and_mask, or_value); } +int cx18_av_write_no_acfg(struct cx18 *cx, u16 addr, u8 value, int no_acfg_mask) +{ + int retval; + u32 saved_reg[8] = {0}; + + if (no_acfg_mask & CXADEC_NO_ACFG_AFE) { + saved_reg[0] = cx18_av_read4(cx, CXADEC_CHIP_CTRL); + saved_reg[1] = cx18_av_read4(cx, CXADEC_AFE_CTRL); + } + + if (no_acfg_mask & CXADEC_NO_ACFG_PLL) { + saved_reg[2] = cx18_av_read4(cx, CXADEC_PLL_CTRL1); + saved_reg[3] = cx18_av_read4(cx, CXADEC_VID_PLL_FRAC); + } + + if (no_acfg_mask & CXADEC_NO_ACFG_VID) { + saved_reg[4] = cx18_av_read4(cx, CXADEC_HORIZ_TIM_CTRL); + saved_reg[5] = cx18_av_read4(cx, CXADEC_VERT_TIM_CTRL); + saved_reg[6] = cx18_av_read4(cx, CXADEC_SRC_COMB_CFG); + saved_reg[7] = cx18_av_read4(cx, CXADEC_CHROMA_VBIOFF_CFG); + } + + retval = cx18_av_write(cx, addr, value); + + if (no_acfg_mask & CXADEC_NO_ACFG_AFE) { + cx18_av_write4(cx, CXADEC_CHIP_CTRL, saved_reg[0]); + cx18_av_write4(cx, CXADEC_AFE_CTRL, saved_reg[1]); + } + + if (no_acfg_mask & CXADEC_NO_ACFG_PLL) { + cx18_av_write4(cx, CXADEC_PLL_CTRL1, saved_reg[2]); + cx18_av_write4(cx, CXADEC_VID_PLL_FRAC, saved_reg[3]); + } + + if (no_acfg_mask & CXADEC_NO_ACFG_VID) { + cx18_av_write4(cx, CXADEC_HORIZ_TIM_CTRL, saved_reg[4]); + cx18_av_write4(cx, CXADEC_VERT_TIM_CTRL, saved_reg[5]); + cx18_av_write4(cx, CXADEC_SRC_COMB_CFG, saved_reg[6]); + cx18_av_write4(cx, CXADEC_CHROMA_VBIOFF_CFG, saved_reg[7]); + } + + return retval; +} + +int cx18_av_and_or_no_acfg(struct cx18 *cx, u16 addr, unsigned and_mask, + u8 or_value, int no_acfg_mask) +{ + return cx18_av_write_no_acfg(cx, addr, + (cx18_av_read(cx, addr) & and_mask) | + or_value, no_acfg_mask); +} + /* ----------------------------------------------------------------------- */ static int set_input(struct cx18 *cx, enum cx18_av_video_input vid_input, @@ -170,13 +222,15 @@ static void input_change(struct cx18 *cx) /* Follow step 8c and 8d of section 3.16 in the cx18_av datasheet */ if (std & V4L2_STD_SECAM) - cx18_av_write(cx, 0x402, 0); + cx18_av_write_no_acfg(cx, 0x402, 0, CXADEC_NO_ACFG_ALL); else { - cx18_av_write(cx, 0x402, 0x04); + cx18_av_write_no_acfg(cx, 0x402, 0x04, CXADEC_NO_ACFG_ALL); cx18_av_write(cx, 0x49f, (std & V4L2_STD_NTSC) ? 0x14 : 0x11); } - cx18_av_and_or(cx, 0x401, ~0x60, 0); - cx18_av_and_or(cx, 0x401, ~0x60, 0x60); + cx18_av_and_or_no_acfg(cx, 0x401, ~0x60, 0, + CXADEC_NO_ACFG_PLL | CXADEC_NO_ACFG_VID); + cx18_av_and_or_no_acfg(cx, 0x401, ~0x60, 0x60, + CXADEC_NO_ACFG_PLL | CXADEC_NO_ACFG_VID); if (std & V4L2_STD_525_60) { if (std == V4L2_STD_NTSC_M_JP) { @@ -228,7 +282,7 @@ static int set_input(struct cx18 *cx, enum cx18_av_video_input vid_input, if ((vid_input & ~0xff0) || luma < CX18_AV_SVIDEO_LUMA1 || - luma > CX18_AV_SVIDEO_LUMA4 || + luma > CX18_AV_SVIDEO_LUMA8 || chroma < CX18_AV_SVIDEO_CHROMA4 || chroma > CX18_AV_SVIDEO_CHROMA8) { CX18_ERR("0x%04x is not a valid video input!\n", @@ -262,7 +316,8 @@ static int set_input(struct cx18 *cx, enum cx18_av_video_input vid_input, cx18_av_write(cx, 0x103, reg); /* Set INPUT_MODE to Composite (0) or S-Video (1) */ - cx18_av_and_or(cx, 0x401, ~0x6, is_composite ? 0 : 0x02); + cx18_av_and_or_no_acfg(cx, 0x401, ~0x6, is_composite ? 0 : 0x02, + CXADEC_NO_ACFG_PLL | CXADEC_NO_ACFG_VID); /* Set CH_SEL_ADC2 to 1 if input comes from CH3 */ cx18_av_and_or(cx, 0x102, ~0x2, (reg & 0x80) == 0 ? 2 : 0); /* Set DUAL_MODE_ADC2 to 1 if input comes from both CH2 and CH3 */ @@ -318,12 +373,12 @@ static int set_v4lstd(struct cx18 *cx) This happens for example with the Yuan MPC622. */ if (fmt >= 4 && fmt < 8) { /* Set format to NTSC-M */ - cx18_av_and_or(cx, 0x400, ~0xf, 1); + cx18_av_and_or_no_acfg(cx, 0x400, ~0xf, 1, CXADEC_NO_ACFG_AFE); /* Turn off LCOMB */ cx18_av_and_or(cx, 0x47b, ~6, 0); } - cx18_av_and_or(cx, 0x400, ~0xf, fmt); - cx18_av_and_or(cx, 0x403, ~0x3, pal_m); + cx18_av_and_or_no_acfg(cx, 0x400, ~0xf, fmt, CXADEC_NO_ACFG_AFE); + cx18_av_and_or_no_acfg(cx, 0x403, ~0x3, pal_m, CXADEC_NO_ACFG_ALL); cx18_av_vbi_setup(cx); input_change(cx); return 0; diff --git a/drivers/media/video/cx18/cx18-av-core.h b/drivers/media/video/cx18/cx18-av-core.h index 786901d72e9a..c172823ce1d8 100644 --- a/drivers/media/video/cx18/cx18-av-core.h +++ b/drivers/media/video/cx18/cx18-av-core.h @@ -37,12 +37,16 @@ enum cx18_av_video_input { CX18_AV_COMPOSITE7, CX18_AV_COMPOSITE8, - /* S-Video inputs consist of one luma input (In1-In4) ORed with one + /* S-Video inputs consist of one luma input (In1-In8) ORed with one chroma input (In5-In8) */ CX18_AV_SVIDEO_LUMA1 = 0x10, CX18_AV_SVIDEO_LUMA2 = 0x20, CX18_AV_SVIDEO_LUMA3 = 0x30, CX18_AV_SVIDEO_LUMA4 = 0x40, + CX18_AV_SVIDEO_LUMA5 = 0x50, + CX18_AV_SVIDEO_LUMA6 = 0x60, + CX18_AV_SVIDEO_LUMA7 = 0x70, + CX18_AV_SVIDEO_LUMA8 = 0x80, CX18_AV_SVIDEO_CHROMA4 = 0x400, CX18_AV_SVIDEO_CHROMA5 = 0x500, CX18_AV_SVIDEO_CHROMA6 = 0x600, @@ -291,14 +295,24 @@ struct cx18_av_state { #define CXADEC_SELECT_AUDIO_STANDARD_FM 0xF9 /* FM radio */ #define CXADEC_SELECT_AUDIO_STANDARD_AUTO 0xFF /* Auto detect */ +/* Flags on what to preserve on write to 0x400-0x403 with cx18_av_.*_no_acfg()*/ +#define CXADEC_NO_ACFG_AFE 0x01 /* Preserve 0x100-0x107 */ +#define CXADEC_NO_ACFG_PLL 0x02 /* Preserve 0x108-0x10f */ +#define CXADEC_NO_ACFG_VID 0x04 /* Preserve 0x470-0x47f */ +#define CXADEC_NO_ACFG_ALL 0x07 + /* ----------------------------------------------------------------------- */ /* cx18_av-core.c */ int cx18_av_write(struct cx18 *cx, u16 addr, u8 value); int cx18_av_write4(struct cx18 *cx, u16 addr, u32 value); +int cx18_av_write_no_acfg(struct cx18 *cx, u16 addr, u8 value, + int no_acfg_mask); u8 cx18_av_read(struct cx18 *cx, u16 addr); u32 cx18_av_read4(struct cx18 *cx, u16 addr); int cx18_av_and_or(struct cx18 *cx, u16 addr, unsigned mask, u8 value); int cx18_av_and_or4(struct cx18 *cx, u16 addr, u32 mask, u32 value); +int cx18_av_and_or_no_acfg(struct cx18 *cx, u16 addr, unsigned mask, u8 value, + int no_acfg_mask); int cx18_av_cmd(struct cx18 *cx, unsigned int cmd, void *arg); /* ----------------------------------------------------------------------- */ diff --git a/drivers/media/video/cx18/cx18-cards.c b/drivers/media/video/cx18/cx18-cards.c index baccd079243d..c26e0ef5b075 100644 --- a/drivers/media/video/cx18/cx18-cards.c +++ b/drivers/media/video/cx18/cx18-cards.c @@ -23,6 +23,7 @@ #include "cx18-driver.h" #include "cx18-cards.h" +#include "cx18-av-core.h" #include "cx18-i2c.h" #include <media/cs5345.h> @@ -54,22 +55,22 @@ static const struct cx18_card cx18_card_hvr1600_esmt = { .hw_all = CX18_HW_TVEEPROM | CX18_HW_TUNER | CX18_HW_CS5345 | CX18_HW_DVB, .video_inputs = { - { CX18_CARD_INPUT_VID_TUNER, 0, CX23418_COMPOSITE7 }, - { CX18_CARD_INPUT_SVIDEO1, 1, CX23418_SVIDEO1 }, - { CX18_CARD_INPUT_COMPOSITE1, 1, CX23418_COMPOSITE3 }, - { CX18_CARD_INPUT_SVIDEO2, 2, CX23418_SVIDEO2 }, - { CX18_CARD_INPUT_COMPOSITE2, 2, CX23418_COMPOSITE4 }, + { CX18_CARD_INPUT_VID_TUNER, 0, CX18_AV_COMPOSITE7 }, + { CX18_CARD_INPUT_SVIDEO1, 1, CX18_AV_SVIDEO1 }, + { CX18_CARD_INPUT_COMPOSITE1, 1, CX18_AV_COMPOSITE3 }, + { CX18_CARD_INPUT_SVIDEO2, 2, CX18_AV_SVIDEO2 }, + { CX18_CARD_INPUT_COMPOSITE2, 2, CX18_AV_COMPOSITE4 }, }, .audio_inputs = { { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO8, CS5345_IN_1 | CS5345_MCLK_1_5 }, + CX18_AV_AUDIO8, CS5345_IN_1 | CS5345_MCLK_1_5 }, { CX18_CARD_INPUT_LINE_IN1, - CX23418_AUDIO_SERIAL, CS5345_IN_2 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_2 }, { CX18_CARD_INPUT_LINE_IN2, - CX23418_AUDIO_SERIAL, CS5345_IN_2 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_3 }, }, .radio_input = { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO_SERIAL, 0 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_4 }, .ddr = { /* ESMT M13S128324A-5B memory */ .chip_config = 0x003, @@ -81,6 +82,11 @@ static const struct cx18_card cx18_card_hvr1600_esmt = { }, .gpio_init.initial_value = 0x3001, .gpio_init.direction = 0x3001, + .gpio_i2c_slave_reset = { + .active_lo_mask = 0x3001, + .msecs_asserted = 10, + .msecs_recovery = 40, + }, .i2c = &cx18_i2c_std, }; @@ -94,22 +100,22 @@ static const struct cx18_card cx18_card_hvr1600_samsung = { .hw_all = CX18_HW_TVEEPROM | CX18_HW_TUNER | CX18_HW_CS5345 | CX18_HW_DVB, .video_inputs = { - { CX18_CARD_INPUT_VID_TUNER, 0, CX23418_COMPOSITE7 }, - { CX18_CARD_INPUT_SVIDEO1, 1, CX23418_SVIDEO1 }, - { CX18_CARD_INPUT_COMPOSITE1, 1, CX23418_COMPOSITE3 }, - { CX18_CARD_INPUT_SVIDEO2, 2, CX23418_SVIDEO2 }, - { CX18_CARD_INPUT_COMPOSITE2, 2, CX23418_COMPOSITE4 }, + { CX18_CARD_INPUT_VID_TUNER, 0, CX18_AV_COMPOSITE7 }, + { CX18_CARD_INPUT_SVIDEO1, 1, CX18_AV_SVIDEO1 }, + { CX18_CARD_INPUT_COMPOSITE1, 1, CX18_AV_COMPOSITE3 }, + { CX18_CARD_INPUT_SVIDEO2, 2, CX18_AV_SVIDEO2 }, + { CX18_CARD_INPUT_COMPOSITE2, 2, CX18_AV_COMPOSITE4 }, }, .audio_inputs = { { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO8, CS5345_IN_1 | CS5345_MCLK_1_5 }, + CX18_AV_AUDIO8, CS5345_IN_1 | CS5345_MCLK_1_5 }, { CX18_CARD_INPUT_LINE_IN1, - CX23418_AUDIO_SERIAL, CS5345_IN_2 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_2 }, { CX18_CARD_INPUT_LINE_IN2, - CX23418_AUDIO_SERIAL, CS5345_IN_2 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_3 }, }, .radio_input = { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO_SERIAL, 0 }, + CX18_AV_AUDIO_SERIAL, CS5345_IN_4 }, .ddr = { /* Samsung K4D263238G-VC33 memory */ .chip_config = 0x003, @@ -121,6 +127,11 @@ static const struct cx18_card cx18_card_hvr1600_samsung = { }, .gpio_init.initial_value = 0x3001, .gpio_init.direction = 0x3001, + .gpio_i2c_slave_reset = { + .active_lo_mask = 0x3001, + .msecs_asserted = 10, + .msecs_recovery = 40, + }, .i2c = &cx18_i2c_std, }; @@ -141,19 +152,19 @@ static const struct cx18_card cx18_card_h900 = { .hw_audio_ctrl = CX18_HW_CX23418, .hw_all = CX18_HW_TUNER, .video_inputs = { - { CX18_CARD_INPUT_VID_TUNER, 0, CX23418_COMPOSITE2 }, + { CX18_CARD_INPUT_VID_TUNER, 0, CX18_AV_COMPOSITE2 }, { CX18_CARD_INPUT_SVIDEO1, 1, - CX23418_SVIDEO_LUMA3 | CX23418_SVIDEO_CHROMA4 }, - { CX18_CARD_INPUT_COMPOSITE1, 1, CX23418_COMPOSITE1 }, + CX18_AV_SVIDEO_LUMA3 | CX18_AV_SVIDEO_CHROMA4 }, + { CX18_CARD_INPUT_COMPOSITE1, 1, CX18_AV_COMPOSITE1 }, }, .audio_inputs = { { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO8, 0 }, + CX18_AV_AUDIO8, 0 }, { CX18_CARD_INPUT_LINE_IN1, - CX23418_AUDIO_SERIAL, 0 }, + CX18_AV_AUDIO_SERIAL, 0 }, }, .radio_input = { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO_SERIAL, 0 }, + CX18_AV_AUDIO_SERIAL, 0 }, .tuners = { { .std = V4L2_STD_ALL, .tuner = TUNER_XC2028 }, }, @@ -183,23 +194,26 @@ static const struct cx18_card_pci_info cx18_pci_mpc718[] = { static const struct cx18_card cx18_card_mpc718 = { .type = CX18_CARD_YUAN_MPC718, .name = "Yuan MPC718", - .comment = "Not yet supported!\n", - .v4l2_capabilities = 0, + .comment = "Some Composite and S-Video inputs are currently working.\n", + .v4l2_capabilities = CX18_CAP_ENCODER, .hw_audio_ctrl = CX18_HW_CX23418, .hw_all = CX18_HW_TUNER, .video_inputs = { - { CX18_CARD_INPUT_VID_TUNER, 0, CX23418_COMPOSITE7 }, - { CX18_CARD_INPUT_SVIDEO1, 1, CX23418_SVIDEO1 }, - { CX18_CARD_INPUT_COMPOSITE1, 1, CX23418_COMPOSITE3 }, + { CX18_CARD_INPUT_VID_TUNER, 0, CX18_AV_COMPOSITE2 }, + { CX18_CARD_INPUT_SVIDEO1, 1, + CX18_AV_SVIDEO_LUMA3 | CX18_AV_SVIDEO_CHROMA4 }, + { CX18_CARD_INPUT_COMPOSITE1, 1, CX18_AV_COMPOSITE1 }, + { CX18_CARD_INPUT_SVIDEO2, 2, + CX18_AV_SVIDEO_LUMA7 | CX18_AV_SVIDEO_CHROMA8 }, + { CX18_CARD_INPUT_COMPOSITE2, 2, CX18_AV_COMPOSITE6 }, + { CX18_CARD_INPUT_COMPOSITE3, 2, CX18_AV_COMPOSITE3 }, }, .audio_inputs = { - { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO8, 0 }, - { CX18_CARD_INPUT_LINE_IN1, - CX23418_AUDIO_SERIAL, 0 }, + { CX18_CARD_INPUT_AUD_TUNER, CX18_AV_AUDIO5, 0 }, + { CX18_CARD_INPUT_LINE_IN1, CX18_AV_AUDIO_SERIAL, 0 }, + { CX18_CARD_INPUT_LINE_IN2, CX18_AV_AUDIO_SERIAL, 0 }, }, - .radio_input = { CX18_CARD_INPUT_AUD_TUNER, - CX23418_AUDIO_SERIAL, 0 }, + .radio_input = { CX18_CARD_INPUT_AUD_TUNER, CX18_AV_AUDIO_SERIAL, 0 }, .tuners = { /* XC3028 tuner */ { .std = V4L2_STD_ALL, .tuner = TUNER_XC2028 }, diff --git a/drivers/media/video/cx18/cx18-cards.h b/drivers/media/video/cx18/cx18-cards.h index bccb67f0db16..dc2dd945d4c3 100644 --- a/drivers/media/video/cx18/cx18-cards.h +++ b/drivers/media/video/cx18/cx18-cards.h @@ -36,36 +36,6 @@ #define CX18_CARD_INPUT_COMPOSITE2 5 #define CX18_CARD_INPUT_COMPOSITE3 6 -enum cx34180_video_input { - /* Composite video inputs In1-In8 */ - CX23418_COMPOSITE1 = 1, - CX23418_COMPOSITE2, - CX23418_COMPOSITE3, - CX23418_COMPOSITE4, - CX23418_COMPOSITE5, - CX23418_COMPOSITE6, - CX23418_COMPOSITE7, - CX23418_COMPOSITE8, - - /* S-Video inputs consist of one luma input (In1-In4) ORed with one - chroma input (In5-In8) */ - CX23418_SVIDEO_LUMA1 = 0x10, - CX23418_SVIDEO_LUMA2 = 0x20, - CX23418_SVIDEO_LUMA3 = 0x30, - CX23418_SVIDEO_LUMA4 = 0x40, - CX23418_SVIDEO_CHROMA4 = 0x400, - CX23418_SVIDEO_CHROMA5 = 0x500, - CX23418_SVIDEO_CHROMA6 = 0x600, - CX23418_SVIDEO_CHROMA7 = 0x700, - CX23418_SVIDEO_CHROMA8 = 0x800, - - /* S-Video aliases for common luma/chroma combinations */ - CX23418_SVIDEO1 = 0x510, - CX23418_SVIDEO2 = 0x620, - CX23418_SVIDEO3 = 0x730, - CX23418_SVIDEO4 = 0x840, -}; - /* audio inputs */ #define CX18_CARD_INPUT_AUD_TUNER 1 #define CX18_CARD_INPUT_LINE_IN1 2 @@ -75,16 +45,6 @@ enum cx34180_video_input { #define CX18_CARD_MAX_AUDIO_INPUTS 3 #define CX18_CARD_MAX_TUNERS 2 -enum cx23418_audio_input { - /* Audio inputs: serial or In4-In8 */ - CX23418_AUDIO_SERIAL, - CX23418_AUDIO4 = 4, - CX23418_AUDIO5, - CX23418_AUDIO6, - CX23418_AUDIO7, - CX23418_AUDIO8, -}; - /* V4L2 capability aliases */ #define CX18_CAP_ENCODER (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER | \ V4L2_CAP_AUDIO | V4L2_CAP_READWRITE) @@ -118,6 +78,13 @@ struct cx18_gpio_init { /* set initial GPIO DIR and OUT values */ u32 initial_value; }; +struct cx18_gpio_i2c_slave_reset { + u32 active_lo_mask; /* GPIO outputs that reset i2c chips when low */ + u32 active_hi_mask; /* GPIO outputs that reset i2c chips when high */ + int msecs_asserted; /* time period reset must remain asserted */ + int msecs_recovery; /* time after deassert for chips to be ready */ +}; + struct cx18_card_tuner { v4l2_std_id std; /* standard for which the tuner is suitable */ int tuner; /* tuner ID (from tuner.h) */ @@ -154,7 +121,8 @@ struct cx18_card { /* GPIO card-specific settings */ u8 xceive_pin; /* XCeive tuner GPIO reset pin */ - struct cx18_gpio_init gpio_init; + struct cx18_gpio_init gpio_init; + struct cx18_gpio_i2c_slave_reset gpio_i2c_slave_reset; struct cx18_card_tuner tuners[CX18_CARD_MAX_TUNERS]; struct cx18_card_tuner_i2c *i2c; diff --git a/drivers/media/video/cx18/cx18-dvb.c b/drivers/media/video/cx18/cx18-dvb.c index c9744173f969..cae38985b131 100644 --- a/drivers/media/video/cx18/cx18-dvb.c +++ b/drivers/media/video/cx18/cx18-dvb.c @@ -69,11 +69,21 @@ static int cx18_dvb_start_feed(struct dvb_demux_feed *feed) struct dvb_demux *demux = feed->demux; struct cx18_stream *stream = (struct cx18_stream *) demux->priv; struct cx18 *cx = stream->cx; - int ret = -EINVAL; + int ret; u32 v; CX18_DEBUG_INFO("Start feed: pid = 0x%x index = %d\n", feed->pid, feed->index); + + mutex_lock(&cx->serialize_lock); + ret = cx18_init_on_first_open(cx); + mutex_unlock(&cx->serialize_lock); + if (ret) { + CX18_ERR("Failed to initialize firmware starting DVB feed\n"); + return ret; + } + ret = -EINVAL; + switch (cx->card->type) { case CX18_CARD_HVR_1600_ESMT: case CX18_CARD_HVR_1600_SAMSUNG: @@ -101,6 +111,11 @@ static int cx18_dvb_start_feed(struct dvb_demux_feed *feed) if (stream->dvb.feeding++ == 0) { CX18_DEBUG_INFO("Starting Transport DMA\n"); ret = cx18_start_v4l2_encode_stream(stream); + if (ret < 0) { + CX18_DEBUG_INFO( + "Failed to start Transport DMA\n"); + stream->dvb.feeding--; + } } else ret = 0; mutex_unlock(&stream->dvb.feedlock); diff --git a/drivers/media/video/cx18/cx18-gpio.c b/drivers/media/video/cx18/cx18-gpio.c index ceb63653c926..b302833f6f9d 100644 --- a/drivers/media/video/cx18/cx18-gpio.c +++ b/drivers/media/video/cx18/cx18-gpio.c @@ -53,10 +53,34 @@ static void gpio_write(struct cx18 *cx) write_reg(((dir & 0xffff) << 16) | (val & 0xffff), CX18_REG_GPIO_OUT1); write_reg(dir & 0xffff0000, CX18_REG_GPIO_DIR2); - write_reg((dir & 0xffff0000) | ((val & 0xffff0000) >> 16), + write_reg_sync((dir & 0xffff0000) | ((val & 0xffff0000) >> 16), CX18_REG_GPIO_OUT2); } +void cx18_reset_i2c_slaves_gpio(struct cx18 *cx) +{ + const struct cx18_gpio_i2c_slave_reset *p; + + p = &cx->card->gpio_i2c_slave_reset; + + if ((p->active_lo_mask | p->active_hi_mask) == 0) + return; + + /* Assuming that the masks are a subset of the bits in gpio_dir */ + + /* Assert */ + cx->gpio_val = + (cx->gpio_val | p->active_hi_mask) & ~(p->active_lo_mask); + gpio_write(cx); + schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_asserted)); + + /* Deassert */ + cx->gpio_val = + (cx->gpio_val | p->active_lo_mask) & ~(p->active_hi_mask); + gpio_write(cx); + schedule_timeout_uninterruptible(msecs_to_jiffies(p->msecs_recovery)); +} + void cx18_gpio_init(struct cx18 *cx) { cx->gpio_dir = cx->card->gpio_init.direction; diff --git a/drivers/media/video/cx18/cx18-gpio.h b/drivers/media/video/cx18/cx18-gpio.h index 41bac8856b50..525c328f748a 100644 --- a/drivers/media/video/cx18/cx18-gpio.h +++ b/drivers/media/video/cx18/cx18-gpio.h @@ -21,4 +21,5 @@ */ void cx18_gpio_init(struct cx18 *cx); +void cx18_reset_i2c_slaves_gpio(struct cx18 *cx); int cx18_reset_tuner_gpio(void *dev, int cmd, int value); diff --git a/drivers/media/video/cx18/cx18-i2c.c b/drivers/media/video/cx18/cx18-i2c.c index 1d6c51a75313..680bc4e35b79 100644 --- a/drivers/media/video/cx18/cx18-i2c.c +++ b/drivers/media/video/cx18/cx18-i2c.c @@ -405,6 +405,8 @@ int init_cx18_i2c(struct cx18 *cx) cx18_setscl(&cx->i2c_algo_cb_data[1], 1); cx18_setsda(&cx->i2c_algo_cb_data[1], 1); + cx18_reset_i2c_slaves_gpio(cx); + return i2c_bit_add_bus(&cx->i2c_adap[0]) || i2c_bit_add_bus(&cx->i2c_adap[1]); } diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c index 607efdcd22f8..1da6f134888d 100644 --- a/drivers/media/video/cx25840/cx25840-core.c +++ b/drivers/media/video/cx25840/cx25840-core.c @@ -433,7 +433,7 @@ static int set_input(struct i2c_client *client, enum cx25840_video_input vid_inp int chroma = vid_input & 0xf00; if ((vid_input & ~0xff0) || - luma < CX25840_SVIDEO_LUMA1 || luma > CX25840_SVIDEO_LUMA4 || + luma < CX25840_SVIDEO_LUMA1 || luma > CX25840_SVIDEO_LUMA8 || chroma < CX25840_SVIDEO_CHROMA4 || chroma > CX25840_SVIDEO_CHROMA8) { v4l_err(client, "0x%04x is not a valid video input!\n", vid_input); diff --git a/drivers/media/video/cx88/cx88-alsa.c b/drivers/media/video/cx88/cx88-alsa.c index e976fc6bef7c..80c8883e54b5 100644 --- a/drivers/media/video/cx88/cx88-alsa.c +++ b/drivers/media/video/cx88/cx88-alsa.c @@ -332,6 +332,12 @@ static int snd_cx88_pcm_open(struct snd_pcm_substream *substream) struct snd_pcm_runtime *runtime = substream->runtime; int err; + if (!chip) { + printk(KERN_ERR "BUG: cx88 can't find device struct." + " Can't proceed with open\n"); + return -ENODEV; + } + err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS); if (err < 0) goto _error; diff --git a/drivers/media/video/em28xx/em28xx-audio.c b/drivers/media/video/em28xx/em28xx-audio.c index 92b2a6db4fdc..3c006103c1eb 100644 --- a/drivers/media/video/em28xx/em28xx-audio.c +++ b/drivers/media/video/em28xx/em28xx-audio.c @@ -268,6 +268,12 @@ static int snd_em28xx_capture_open(struct snd_pcm_substream *substream) dprintk("opening device and trying to acquire exclusive lock\n"); + if (!dev) { + printk(KERN_ERR "BUG: em28xx can't find device struct." + " Can't proceed with open\n"); + return -ENODEV; + } + /* Sets volume, mute, etc */ dev->mute = 0; @@ -415,6 +421,12 @@ static int em28xx_audio_init(struct em28xx *dev) static int devnr; int ret, err; + if (dev->has_audio_class) { + /* This device does not support the extension (in this case + the device is expecting the snd-usb-audio module */ + return 0; + } + printk(KERN_INFO "em28xx-audio.c: probing for em28x1 " "non standard usbaudio\n"); printk(KERN_INFO "em28xx-audio.c: Copyright (C) 2006 Markus " @@ -458,6 +470,12 @@ static int em28xx_audio_fini(struct em28xx *dev) if (dev == NULL) return 0; + if (dev->has_audio_class) { + /* This device does not support the extension (in this case + the device is expecting the snd-usb-audio module */ + return 0; + } + if (dev->adev) { snd_card_free(dev->adev->sndcard); kfree(dev->adev); diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index 3e4f3c7e92e7..8cbda43727c3 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c @@ -157,6 +157,7 @@ struct em28xx_board em28xx_boards[] = { .tda9887_conf = TDA9887_PRESENT, .tuner_type = TUNER_XC2028, .mts_firmware = 1, + .has_dvb = 1, .decoder = EM28XX_TVP5150, .input = { { .type = EM28XX_VMUX_TELEVISION, @@ -524,6 +525,9 @@ void em28xx_pre_card_setup(struct em28xx *dev) rc = em28xx_read_reg(dev, EM28XX_R0A_CHIPID); if (rc > 0) { switch (rc) { + case CHIP_ID_EM2860: + em28xx_info("chip ID is em2860\n"); + break; case CHIP_ID_EM2883: em28xx_info("chip ID is em2882/em2883\n"); dev->wait_after_write = 0; diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c index 8cf4983f0039..0b2333ee07f8 100644 --- a/drivers/media/video/em28xx/em28xx-dvb.c +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -382,6 +382,11 @@ static int dvb_init(struct em28xx *dev) int result = 0; struct em28xx_dvb *dvb; + if (!dev->has_dvb) { + /* This device does not support the extension */ + return 0; + } + dvb = kzalloc(sizeof(struct em28xx_dvb), GFP_KERNEL); if (dvb == NULL) { @@ -444,6 +449,11 @@ out_free: static int dvb_fini(struct em28xx *dev) { + if (!dev->has_dvb) { + /* This device does not support the extension */ + return 0; + } + if (dev->dvb) { unregister_dvb(dev->dvb); dev->dvb = NULL; diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h index 9058bed07953..fac1ab23f621 100644 --- a/drivers/media/video/em28xx/em28xx-reg.h +++ b/drivers/media/video/em28xx/em28xx-reg.h @@ -84,5 +84,6 @@ /* FIXME: Need to be populated with the other chip ID's */ enum em28xx_chip_id { + CHIP_ID_EM2860 = 34, CHIP_ID_EM2883 = 36, }; diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index fb163ecd9216..285bc62bbe46 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1848,32 +1848,28 @@ static DEFINE_MUTEX(em28xx_extension_devlist_lock); int em28xx_register_extension(struct em28xx_ops *ops) { - struct em28xx *h, *dev = NULL; - - list_for_each_entry(h, &em28xx_devlist, devlist) - dev = h; + struct em28xx *dev = NULL; mutex_lock(&em28xx_extension_devlist_lock); list_add_tail(&ops->next, &em28xx_extension_devlist); - if (dev) - ops->init(dev); - + list_for_each_entry(dev, &em28xx_devlist, devlist) { + if (dev) + ops->init(dev); + } printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name); mutex_unlock(&em28xx_extension_devlist_lock); - return 0; } EXPORT_SYMBOL(em28xx_register_extension); void em28xx_unregister_extension(struct em28xx_ops *ops) { - struct em28xx *h, *dev = NULL; - - list_for_each_entry(h, &em28xx_devlist, devlist) - dev = h; + struct em28xx *dev = NULL; - if (dev) - ops->fini(dev); + list_for_each_entry(dev, &em28xx_devlist, devlist) { + if (dev) + ops->fini(dev); + } mutex_lock(&em28xx_extension_devlist_lock); printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name); diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c index 7cc8e9b19fb7..5ec5bb9a94d2 100644 --- a/drivers/media/video/pxa_camera.c +++ b/drivers/media/video/pxa_camera.c @@ -1019,12 +1019,12 @@ static int pxa_camera_probe(struct platform_device *pdev) struct pxa_camera_dev *pcdev; struct resource *res; void __iomem *base; - unsigned int irq; + int irq; int err = 0; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_irq(pdev, 0); - if (!res || !irq) { + if (!res || irq < 0) { err = -ENODEV; goto exit; } diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c index ba3082422a01..f118de6e3672 100644 --- a/drivers/media/video/saa7134/saa7134-alsa.c +++ b/drivers/media/video/saa7134/saa7134-alsa.c @@ -613,9 +613,15 @@ static int snd_card_saa7134_capture_open(struct snd_pcm_substream * substream) struct snd_pcm_runtime *runtime = substream->runtime; snd_card_saa7134_pcm_t *pcm; snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); - struct saa7134_dev *dev = saa7134->dev; + struct saa7134_dev *dev; int amux, err; + if (!saa7134) { + printk(KERN_ERR "BUG: saa7134 can't find device struct." + " Can't proceed with open\n"); + return -ENODEV; + } + dev = saa7134->dev; mutex_lock(&dev->dmasound.lock); dev->dmasound.read_count = 0; diff --git a/drivers/media/video/saa7134/saa7134-cards.c b/drivers/media/video/saa7134/saa7134-cards.c index b111903aa322..2618cfa592e7 100644 --- a/drivers/media/video/saa7134/saa7134-cards.c +++ b/drivers/media/video/saa7134/saa7134-cards.c @@ -4114,11 +4114,7 @@ struct saa7134_board saa7134_boards[] = { .radio_type = UNSET, .tuner_addr = ADDR_UNSET, .radio_addr = ADDR_UNSET, - /* - TODO: .mpeg = SAA7134_MPEG_DVB, - */ - .inputs = {{ .name = name_tv, .vmux = 1, @@ -4157,7 +4153,7 @@ struct saa7134_board saa7134_boards[] = { } }, .radio = { .name = name_radio, - .amux = LINE1, + .amux = TV, }, }, [SAA7134_BOARD_AVERMEDIA_M115] = { @@ -4167,6 +4163,7 @@ struct saa7134_board saa7134_boards[] = { .radio_type = UNSET, .tuner_addr = ADDR_UNSET, .radio_addr = ADDR_UNSET, + .mpeg = SAA7134_MPEG_DVB, .inputs = {{ .name = name_tv, .vmux = 1, @@ -5351,22 +5348,21 @@ static int saa7134_xc2028_callback(struct saa7134_dev *dev, { switch (command) { case XC2028_TUNER_RESET: - saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x06e20000, 0x06e20000); - saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x06a20000, 0x06a20000); - mdelay(250); - saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x06e20000, 0); - saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x06a20000, 0); - mdelay(250); - saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x06e20000, 0x06e20000); - saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x06a20000, 0x06a20000); - mdelay(250); - saa_andorl(SAA7133_ANALOG_IO_SELECT >> 2, 0x02, 0x02); - saa_andorl(SAA7134_ANALOG_IN_CTRL1 >> 2, 0x81, 0x81); - saa_andorl(SAA7134_AUDIO_CLOCK0 >> 2, 0x03187de7, 0x03187de7); - saa_andorl(SAA7134_AUDIO_PLL_CTRL >> 2, 0x03, 0x03); - saa_andorl(SAA7134_AUDIO_CLOCKS_PER_FIELD0 >> 2, - 0x0001e000, 0x0001e000); - return 0; + saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x00008000, 0x00000000); + saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x00008000, 0x00008000); + switch (dev->board) { + case SAA7134_BOARD_AVERMEDIA_CARDBUS_506: + saa7134_set_gpio(dev, 23, 0); + msleep(10); + saa7134_set_gpio(dev, 23, 1); + break; + case SAA7134_BOARD_AVERMEDIA_A16D: + saa7134_set_gpio(dev, 21, 0); + msleep(10); + saa7134_set_gpio(dev, 21, 1); + break; + } + return 0; } return -EINVAL; } @@ -5553,9 +5549,7 @@ int saa7134_board_init1(struct saa7134_dev *dev) saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x08000000, 0x00000000); break; case SAA7134_BOARD_AVERMEDIA_CARDBUS: - case SAA7134_BOARD_AVERMEDIA_CARDBUS_506: case SAA7134_BOARD_AVERMEDIA_M115: - case SAA7134_BOARD_AVERMEDIA_A16D: /* power-down tuner chip */ saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0xffffffff, 0); saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0xffffffff, 0); @@ -5565,6 +5559,18 @@ int saa7134_board_init1(struct saa7134_dev *dev) saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0xffffffff, 0xffffffff); msleep(10); break; + case SAA7134_BOARD_AVERMEDIA_CARDBUS_506: + saa7134_set_gpio(dev, 23, 0); + msleep(10); + saa7134_set_gpio(dev, 23, 1); + break; + case SAA7134_BOARD_AVERMEDIA_A16D: + saa7134_set_gpio(dev, 21, 0); + msleep(10); + saa7134_set_gpio(dev, 21, 1); + msleep(1); + dev->has_remote = SAA7134_REMOTE_GPIO; + break; case SAA7134_BOARD_BEHOLD_COLUMBUS_TVFM: /* power-down tuner chip */ saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x000A8004, 0x000A8004); @@ -5615,7 +5621,8 @@ int saa7134_board_init1(struct saa7134_dev *dev) saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x80040100, 0x80040100); saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, 0x80040100, 0x00040100); printk("%s: %s: hybrid analog/dvb card\n" - "%s: Sorry, only the analog inputs are supported for now.\n", + "%s: Sorry, only analog s-video and composite input " + "are supported for now.\n", dev->name, card(dev).name, dev->name); break; } @@ -5675,6 +5682,7 @@ static void saa7134_tuner_setup(struct saa7134_dev *dev) switch (dev->board) { case SAA7134_BOARD_AVERMEDIA_A16D: + case SAA7134_BOARD_AVERMEDIA_CARDBUS_506: ctl.demod = XC3028_FE_ZARLINK456; break; default: diff --git a/drivers/media/video/saa7134/saa7134-dvb.c b/drivers/media/video/saa7134/saa7134-dvb.c index 469f93aac008..341b101b0357 100644 --- a/drivers/media/video/saa7134/saa7134-dvb.c +++ b/drivers/media/video/saa7134/saa7134-dvb.c @@ -153,12 +153,12 @@ static int mt352_aver777_init(struct dvb_frontend* fe) return 0; } -static int mt352_aver_a16d_init(struct dvb_frontend *fe) +static int mt352_avermedia_xc3028_init(struct dvb_frontend *fe) { - static u8 clock_config [] = { CLOCK_CTL, 0x38, 0x2d }; - static u8 reset [] = { RESET, 0x80 }; - static u8 adc_ctl_1_cfg [] = { ADC_CTL_1, 0x40 }; - static u8 agc_cfg [] = { AGC_TARGET, 0x28, 0xa0 }; + static u8 clock_config [] = { CLOCK_CTL, 0x38, 0x2d }; + static u8 reset [] = { RESET, 0x80 }; + static u8 adc_ctl_1_cfg [] = { ADC_CTL_1, 0x40 }; + static u8 agc_cfg [] = { AGC_TARGET, 0xe }; static u8 capt_range_cfg[] = { CAPT_RANGE, 0x33 }; mt352_write(fe, clock_config, sizeof(clock_config)); @@ -167,12 +167,9 @@ static int mt352_aver_a16d_init(struct dvb_frontend *fe) mt352_write(fe, adc_ctl_1_cfg, sizeof(adc_ctl_1_cfg)); mt352_write(fe, agc_cfg, sizeof(agc_cfg)); mt352_write(fe, capt_range_cfg, sizeof(capt_range_cfg)); - return 0; } - - static int mt352_pinnacle_tuner_set_params(struct dvb_frontend* fe, struct dvb_frontend_parameters* params) { @@ -215,14 +212,10 @@ static struct mt352_config avermedia_777 = { .demod_init = mt352_aver777_init, }; -static struct mt352_config avermedia_16d = { - .demod_address = 0xf, - .demod_init = mt352_aver_a16d_init, -}; - -static struct mt352_config avermedia_e506r_mt352_dev = { +static struct mt352_config avermedia_xc3028_mt352_dev = { .demod_address = (0x1e >> 1), .no_tuner = 1, + .demod_init = mt352_avermedia_xc3028_init, }; /* ================================================================== @@ -975,9 +968,10 @@ static int dvb_init(struct saa7134_dev *dev) } break; case SAA7134_BOARD_AVERMEDIA_A16D: - dprintk("avertv A16D dvb setup\n"); - dev->dvb.frontend = dvb_attach(mt352_attach, &avermedia_16d, - &dev->i2c_adap); + dprintk("AverMedia A16D dvb setup\n"); + dev->dvb.frontend = dvb_attach(mt352_attach, + &avermedia_xc3028_mt352_dev, + &dev->i2c_adap); attach_xc3028 = 1; break; case SAA7134_BOARD_MD7134: @@ -1091,7 +1085,8 @@ static int dvb_init(struct saa7134_dev *dev) ads_tech_duo_config.tuner_address); goto dettach_frontend; } - } + } else + wprintk("failed to attach tda10046\n"); break; case SAA7134_BOARD_TEVION_DVBT_220RF: if (configure_tda827x_fe(dev, &tevion_dvbt220rf_config, @@ -1260,11 +1255,14 @@ static int dvb_init(struct saa7134_dev *dev) goto dettach_frontend; break; case SAA7134_BOARD_AVERMEDIA_CARDBUS_506: + dprintk("AverMedia E506R dvb setup\n"); + saa7134_set_gpio(dev, 25, 0); + msleep(10); + saa7134_set_gpio(dev, 25, 1); dev->dvb.frontend = dvb_attach(mt352_attach, - &avermedia_e506r_mt352_dev, - &dev->i2c_adap); + &avermedia_xc3028_mt352_dev, + &dev->i2c_adap); attach_xc3028 = 1; - break; case SAA7134_BOARD_MD7134_BRIDGE_2: dev->dvb.frontend = dvb_attach(tda10086_attach, &sd1878_4m, &dev->i2c_adap); @@ -1338,7 +1336,8 @@ static int dvb_init(struct saa7134_dev *dev) return ret; dettach_frontend: - dvb_frontend_detach(dev->dvb.frontend); + if (dev->dvb.frontend) + dvb_frontend_detach(dev->dvb.frontend); dev->dvb.frontend = NULL; return -1; diff --git a/drivers/media/video/saa7134/saa7134-empress.c b/drivers/media/video/saa7134/saa7134-empress.c index 81431ee41842..3ae71a340822 100644 --- a/drivers/media/video/saa7134/saa7134-empress.c +++ b/drivers/media/video/saa7134/saa7134-empress.c @@ -110,9 +110,10 @@ static int ts_release(struct inode *inode, struct file *file) { struct saa7134_dev *dev = file->private_data; + mutex_lock(&dev->empress_tsq.vb_lock); + videobuf_stop(&dev->empress_tsq); videobuf_mmap_free(&dev->empress_tsq); - dev->empress_users--; /* stop the encoder */ ts_reset_encoder(dev); @@ -121,6 +122,10 @@ static int ts_release(struct inode *inode, struct file *file) saa_writeb(SAA7134_AUDIO_MUTE_CTRL, saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6)); + dev->empress_users--; + + mutex_unlock(&dev->empress_tsq.vb_lock); + return 0; } @@ -218,8 +223,7 @@ static int empress_enum_fmt_cap(struct file *file, void *priv, static int empress_g_fmt_cap(struct file *file, void *priv, struct v4l2_format *f) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f); @@ -232,8 +236,7 @@ static int empress_g_fmt_cap(struct file *file, void *priv, static int empress_s_fmt_cap(struct file *file, void *priv, struct v4l2_format *f) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f); @@ -247,8 +250,7 @@ static int empress_s_fmt_cap(struct file *file, void *priv, static int empress_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *p) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_reqbufs(&dev->empress_tsq, p); } @@ -256,24 +258,21 @@ static int empress_reqbufs(struct file *file, void *priv, static int empress_querybuf(struct file *file, void *priv, struct v4l2_buffer *b) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_querybuf(&dev->empress_tsq, b); } static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_qbuf(&dev->empress_tsq, b); } static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_dqbuf(&dev->empress_tsq, b, file->f_flags & O_NONBLOCK); @@ -282,8 +281,7 @@ static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b) static int empress_streamon(struct file *file, void *priv, enum v4l2_buf_type type) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_streamon(&dev->empress_tsq); } @@ -291,8 +289,7 @@ static int empress_streamon(struct file *file, void *priv, static int empress_streamoff(struct file *file, void *priv, enum v4l2_buf_type type) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; return videobuf_streamoff(&dev->empress_tsq); } @@ -300,8 +297,7 @@ static int empress_streamoff(struct file *file, void *priv, static int empress_s_ext_ctrls(struct file *file, void *priv, struct v4l2_ext_controls *ctrls) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; /* count == 0 is abused in saa6752hs.c, so that special case is handled here explicitly. */ @@ -320,8 +316,7 @@ static int empress_s_ext_ctrls(struct file *file, void *priv, static int empress_g_ext_ctrls(struct file *file, void *priv, struct v4l2_ext_controls *ctrls) { - struct saa7134_fh *fh = priv; - struct saa7134_dev *dev = fh->dev; + struct saa7134_dev *dev = file->private_data; if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG) return -EINVAL; diff --git a/drivers/media/video/saa7134/saa7134-input.c b/drivers/media/video/saa7134/saa7134-input.c index 919632b10aae..76e6501d238d 100644 --- a/drivers/media/video/saa7134/saa7134-input.c +++ b/drivers/media/video/saa7134/saa7134-input.c @@ -323,6 +323,15 @@ int saa7134_input_init1(struct saa7134_dev *dev) saa_setb(SAA7134_GPIO_GPMODE1, 0x1); saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1); break; + case SAA7134_BOARD_AVERMEDIA_A16D: + ir_codes = ir_codes_avermedia_a16d; + mask_keycode = 0x02F200; + mask_keydown = 0x000400; + polling = 50; /* ms */ + /* Without this we won't receive key up events */ + saa_setb(SAA7134_GPIO_GPMODE1, 0x1); + saa_setb(SAA7134_GPIO_GPSTATUS1, 0x1); + break; case SAA7134_BOARD_KWORLD_TERMINATOR: ir_codes = ir_codes_pixelview; mask_keycode = 0x00001f; diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index a1b92446c8b4..d015bfe00950 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -763,15 +763,6 @@ static struct device_driver ic_drv = { .owner = THIS_MODULE, }; -/* - * Image capture host - this is a host device, not a bus device, so, - * no bus reference, no probing. - */ -static struct class soc_camera_host_class = { - .owner = THIS_MODULE, - .name = "camera_host", -}; - static void dummy_release(struct device *dev) { } @@ -801,7 +792,6 @@ int soc_camera_host_register(struct soc_camera_host *ici) /* Number might be equal to the platform device ID */ sprintf(ici->dev.bus_id, "camera_host%d", ici->nr); - ici->dev.class = &soc_camera_host_class; mutex_lock(&list_lock); list_for_each_entry(ix, &hosts, list) { @@ -1003,14 +993,9 @@ static int __init soc_camera_init(void) ret = driver_register(&ic_drv); if (ret) goto edrvr; - ret = class_register(&soc_camera_host_class); - if (ret) - goto eclr; return 0; -eclr: - driver_unregister(&ic_drv); edrvr: bus_unregister(&soc_camera_bus_type); return ret; @@ -1018,7 +1003,6 @@ edrvr: static void __exit soc_camera_exit(void) { - class_unregister(&soc_camera_host_class); driver_unregister(&ic_drv); bus_unregister(&soc_camera_bus_type); } diff --git a/drivers/media/video/uvc/Makefile b/drivers/media/video/uvc/Makefile new file mode 100644 index 000000000000..968c1994eda0 --- /dev/null +++ b/drivers/media/video/uvc/Makefile @@ -0,0 +1,3 @@ +uvcvideo-objs := uvc_driver.o uvc_queue.o uvc_v4l2.o uvc_video.o uvc_ctrl.o \ + uvc_status.o uvc_isight.o +obj-$(CONFIG_USB_VIDEO_CLASS) += uvcvideo.o diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c new file mode 100644 index 000000000000..f0ee46d15540 --- /dev/null +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -0,0 +1,1256 @@ +/* + * uvc_ctrl.c -- USB Video Class driver - Controls + * + * Copyright (C) 2005-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/uaccess.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <linux/vmalloc.h> +#include <linux/wait.h> +#include <asm/atomic.h> + +#include "uvcvideo.h" + +#define UVC_CTRL_NDATA 2 +#define UVC_CTRL_DATA_CURRENT 0 +#define UVC_CTRL_DATA_BACKUP 1 + +/* ------------------------------------------------------------------------ + * Control, formats, ... + */ + +static struct uvc_control_info uvc_ctrls[] = { + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_BRIGHTNESS_CONTROL, + .index = 0, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_CONTRAST_CONTROL, + .index = 1, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_HUE_CONTROL, + .index = 2, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_SATURATION_CONTROL, + .index = 3, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_SHARPNESS_CONTROL, + .index = 4, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_GAMMA_CONTROL, + .index = 5, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_BACKLIGHT_COMPENSATION_CONTROL, + .index = 8, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_GAIN_CONTROL, + .index = 9, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_POWER_LINE_FREQUENCY_CONTROL, + .index = 10, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_HUE_AUTO_CONTROL, + .index = 11, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_AE_MODE_CONTROL, + .index = 1, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_GET_DEF | UVC_CONTROL_GET_RES + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_AE_PRIORITY_CONTROL, + .index = 2, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, + .index = 3, + .size = 4, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_FOCUS_ABSOLUTE_CONTROL, + .index = 5, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, + }, + { + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_FOCUS_AUTO_CONTROL, + .index = 17, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, + .index = 12, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_TEMPERATURE_CONTROL, + .index = 6, + .size = 2, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, + .index = 13, + .size = 1, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_CUR + | UVC_CONTROL_GET_DEF | UVC_CONTROL_RESTORE, + }, + { + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, + .index = 7, + .size = 4, + .flags = UVC_CONTROL_SET_CUR | UVC_CONTROL_GET_RANGE + | UVC_CONTROL_RESTORE | UVC_CONTROL_AUTO_UPDATE, + }, +}; + +static struct uvc_menu_info power_line_frequency_controls[] = { + { 0, "Disabled" }, + { 1, "50 Hz" }, + { 2, "60 Hz" }, +}; + +static struct uvc_menu_info exposure_auto_controls[] = { + { 1, "Manual Mode" }, + { 2, "Auto Mode" }, + { 4, "Shutter Priority Mode" }, + { 8, "Aperture Priority Mode" }, +}; + +static struct uvc_control_mapping uvc_ctrl_mappings[] = { + { + .id = V4L2_CID_BRIGHTNESS, + .name = "Brightness", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_BRIGHTNESS_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + }, + { + .id = V4L2_CID_CONTRAST, + .name = "Contrast", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_CONTRAST_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_HUE, + .name = "Hue", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_HUE_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + }, + { + .id = V4L2_CID_SATURATION, + .name = "Saturation", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_SATURATION_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_SHARPNESS, + .name = "Sharpness", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_SHARPNESS_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_GAMMA, + .name = "Gamma", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_GAMMA_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_BACKLIGHT_COMPENSATION, + .name = "Backlight Compensation", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_BACKLIGHT_COMPENSATION_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_GAIN, + .name = "Gain", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_GAIN_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_POWER_LINE_FREQUENCY, + .name = "Power Line Frequency", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_POWER_LINE_FREQUENCY_CONTROL, + .size = 2, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_MENU, + .data_type = UVC_CTRL_DATA_TYPE_ENUM, + .menu_info = power_line_frequency_controls, + .menu_count = ARRAY_SIZE(power_line_frequency_controls), + }, + { + .id = V4L2_CID_HUE_AUTO, + .name = "Hue, Auto", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_HUE_AUTO_CONTROL, + .size = 1, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, + .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + }, + { + .id = V4L2_CID_EXPOSURE_AUTO, + .name = "Exposure, Auto", + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_AE_MODE_CONTROL, + .size = 4, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_MENU, + .data_type = UVC_CTRL_DATA_TYPE_BITMASK, + .menu_info = exposure_auto_controls, + .menu_count = ARRAY_SIZE(exposure_auto_controls), + }, + { + .id = V4L2_CID_EXPOSURE_AUTO_PRIORITY, + .name = "Exposure, Auto Priority", + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_AE_PRIORITY_CONTROL, + .size = 1, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, + .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + }, + { + .id = V4L2_CID_EXPOSURE_ABSOLUTE, + .name = "Exposure (Absolute)", + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_EXPOSURE_TIME_ABSOLUTE_CONTROL, + .size = 32, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_AUTO_WHITE_BALANCE, + .name = "White Balance Temperature, Auto", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL, + .size = 1, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, + .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + }, + { + .id = V4L2_CID_WHITE_BALANCE_TEMPERATURE, + .name = "White Balance Temperature", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_TEMPERATURE_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_AUTO_WHITE_BALANCE, + .name = "White Balance Component, Auto", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL, + .size = 1, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, + .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + }, + { + .id = V4L2_CID_BLUE_BALANCE, + .name = "White Balance Blue Component", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + }, + { + .id = V4L2_CID_RED_BALANCE, + .name = "White Balance Red Component", + .entity = UVC_GUID_UVC_PROCESSING, + .selector = PU_WHITE_BALANCE_COMPONENT_CONTROL, + .size = 16, + .offset = 16, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_SIGNED, + }, + { + .id = V4L2_CID_FOCUS_ABSOLUTE, + .name = "Focus (absolute)", + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_FOCUS_ABSOLUTE_CONTROL, + .size = 16, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_INTEGER, + .data_type = UVC_CTRL_DATA_TYPE_UNSIGNED, + }, + { + .id = V4L2_CID_FOCUS_AUTO, + .name = "Focus, Auto", + .entity = UVC_GUID_UVC_CAMERA, + .selector = CT_FOCUS_AUTO_CONTROL, + .size = 1, + .offset = 0, + .v4l2_type = V4L2_CTRL_TYPE_BOOLEAN, + .data_type = UVC_CTRL_DATA_TYPE_BOOLEAN, + }, +}; + +/* ------------------------------------------------------------------------ + * Utility functions + */ + +static inline __u8 *uvc_ctrl_data(struct uvc_control *ctrl, int id) +{ + return ctrl->data + id * ctrl->info->size; +} + +static inline int uvc_get_bit(const __u8 *data, int bit) +{ + return (data[bit >> 3] >> (bit & 7)) & 1; +} + +/* Extract the bit string specified by mapping->offset and mapping->size + * from the little-endian data stored at 'data' and return the result as + * a signed 32bit integer. Sign extension will be performed if the mapping + * references a signed data type. + */ +static __s32 uvc_get_le_value(const __u8 *data, + struct uvc_control_mapping *mapping) +{ + int bits = mapping->size; + int offset = mapping->offset; + __s32 value = 0; + __u8 mask; + + data += offset / 8; + offset &= 7; + mask = ((1LL << bits) - 1) << offset; + + for (; bits > 0; data++) { + __u8 byte = *data & mask; + value |= offset > 0 ? (byte >> offset) : (byte << (-offset)); + bits -= 8 - (offset > 0 ? offset : 0); + offset -= 8; + mask = (1 << bits) - 1; + } + + /* Sign-extend the value if needed */ + if (mapping->data_type == UVC_CTRL_DATA_TYPE_SIGNED) + value |= -(value & (1 << (mapping->size - 1))); + + return value; +} + +/* Set the bit string specified by mapping->offset and mapping->size + * in the little-endian data stored at 'data' to the value 'value'. + */ +static void uvc_set_le_value(__s32 value, __u8 *data, + struct uvc_control_mapping *mapping) +{ + int bits = mapping->size; + int offset = mapping->offset; + __u8 mask; + + data += offset / 8; + offset &= 7; + + for (; bits > 0; data++) { + mask = ((1LL << bits) - 1) << offset; + *data = (*data & ~mask) | ((value << offset) & mask); + value >>= offset ? offset : 8; + bits -= 8 - offset; + offset = 0; + } +} + +/* ------------------------------------------------------------------------ + * Terminal and unit management + */ + +static const __u8 uvc_processing_guid[16] = UVC_GUID_UVC_PROCESSING; +static const __u8 uvc_camera_guid[16] = UVC_GUID_UVC_CAMERA; +static const __u8 uvc_media_transport_input_guid[16] = + UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT; + +static int uvc_entity_match_guid(struct uvc_entity *entity, __u8 guid[16]) +{ + switch (UVC_ENTITY_TYPE(entity)) { + case ITT_CAMERA: + return memcmp(uvc_camera_guid, guid, 16) == 0; + + case ITT_MEDIA_TRANSPORT_INPUT: + return memcmp(uvc_media_transport_input_guid, guid, 16) == 0; + + case VC_PROCESSING_UNIT: + return memcmp(uvc_processing_guid, guid, 16) == 0; + + case VC_EXTENSION_UNIT: + return memcmp(entity->extension.guidExtensionCode, + guid, 16) == 0; + + default: + return 0; + } +} + +/* ------------------------------------------------------------------------ + * UVC Controls + */ + +static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, + struct uvc_control_mapping **mapping, struct uvc_control **control, + int next) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *map; + unsigned int i; + + if (entity == NULL) + return; + + for (i = 0; i < entity->ncontrols; ++i) { + ctrl = &entity->controls[i]; + if (ctrl->info == NULL) + continue; + + list_for_each_entry(map, &ctrl->info->mappings, list) { + if ((map->id == v4l2_id) && !next) { + *control = ctrl; + *mapping = map; + return; + } + + if ((*mapping == NULL || (*mapping)->id > map->id) && + (map->id > v4l2_id) && next) { + *control = ctrl; + *mapping = map; + } + } + } +} + +struct uvc_control *uvc_find_control(struct uvc_video_device *video, + __u32 v4l2_id, struct uvc_control_mapping **mapping) +{ + struct uvc_control *ctrl = NULL; + struct uvc_entity *entity; + int next = v4l2_id & V4L2_CTRL_FLAG_NEXT_CTRL; + + *mapping = NULL; + + /* Mask the query flags. */ + v4l2_id &= V4L2_CTRL_ID_MASK; + + /* Find the control. */ + __uvc_find_control(video->processing, v4l2_id, mapping, &ctrl, next); + if (ctrl && !next) + return ctrl; + + list_for_each_entry(entity, &video->iterms, chain) { + __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); + if (ctrl && !next) + return ctrl; + } + + list_for_each_entry(entity, &video->extensions, chain) { + __uvc_find_control(entity, v4l2_id, mapping, &ctrl, next); + if (ctrl && !next) + return ctrl; + } + + if (ctrl == NULL && !next) + uvc_trace(UVC_TRACE_CONTROL, "Control 0x%08x not found.\n", + v4l2_id); + + return ctrl; +} + +int uvc_query_v4l2_ctrl(struct uvc_video_device *video, + struct v4l2_queryctrl *v4l2_ctrl) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *mapping; + struct uvc_menu_info *menu; + unsigned int i; + __u8 data[8]; + int ret; + + ctrl = uvc_find_control(video, v4l2_ctrl->id, &mapping); + if (ctrl == NULL) + return -EINVAL; + + v4l2_ctrl->id = mapping->id; + v4l2_ctrl->type = mapping->v4l2_type; + strncpy(v4l2_ctrl->name, mapping->name, sizeof v4l2_ctrl->name); + v4l2_ctrl->flags = 0; + + if (!(ctrl->info->flags & UVC_CONTROL_SET_CUR)) + v4l2_ctrl->flags |= V4L2_CTRL_FLAG_READ_ONLY; + + if (ctrl->info->flags & UVC_CONTROL_GET_DEF) { + if ((ret = uvc_query_ctrl(video->dev, GET_DEF, ctrl->entity->id, + video->dev->intfnum, ctrl->info->selector, + &data, ctrl->info->size)) < 0) + return ret; + v4l2_ctrl->default_value = uvc_get_le_value(data, mapping); + } + + if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { + v4l2_ctrl->minimum = 0; + v4l2_ctrl->maximum = mapping->menu_count - 1; + v4l2_ctrl->step = 1; + + menu = mapping->menu_info; + for (i = 0; i < mapping->menu_count; ++i, ++menu) { + if (menu->value == v4l2_ctrl->default_value) { + v4l2_ctrl->default_value = i; + break; + } + } + + return 0; + } + + if (ctrl->info->flags & UVC_CONTROL_GET_MIN) { + if ((ret = uvc_query_ctrl(video->dev, GET_MIN, ctrl->entity->id, + video->dev->intfnum, ctrl->info->selector, + &data, ctrl->info->size)) < 0) + return ret; + v4l2_ctrl->minimum = uvc_get_le_value(data, mapping); + } + if (ctrl->info->flags & UVC_CONTROL_GET_MAX) { + if ((ret = uvc_query_ctrl(video->dev, GET_MAX, ctrl->entity->id, + video->dev->intfnum, ctrl->info->selector, + &data, ctrl->info->size)) < 0) + return ret; + v4l2_ctrl->maximum = uvc_get_le_value(data, mapping); + } + if (ctrl->info->flags & UVC_CONTROL_GET_RES) { + if ((ret = uvc_query_ctrl(video->dev, GET_RES, ctrl->entity->id, + video->dev->intfnum, ctrl->info->selector, + &data, ctrl->info->size)) < 0) + return ret; + v4l2_ctrl->step = uvc_get_le_value(data, mapping); + } + + return 0; +} + + +/* -------------------------------------------------------------------------- + * Control transactions + * + * To make extended set operations as atomic as the hardware allows, controls + * are handled using begin/commit/rollback operations. + * + * At the beginning of a set request, uvc_ctrl_begin should be called to + * initialize the request. This function acquires the control lock. + * + * When setting a control, the new value is stored in the control data field + * at position UVC_CTRL_DATA_CURRENT. The control is then marked as dirty for + * later processing. If the UVC and V4L2 control sizes differ, the current + * value is loaded from the hardware before storing the new value in the data + * field. + * + * After processing all controls in the transaction, uvc_ctrl_commit or + * uvc_ctrl_rollback must be called to apply the pending changes to the + * hardware or revert them. When applying changes, all controls marked as + * dirty will be modified in the UVC device, and the dirty flag will be + * cleared. When reverting controls, the control data field + * UVC_CTRL_DATA_CURRENT is reverted to its previous value + * (UVC_CTRL_DATA_BACKUP) for all dirty controls. Both functions release the + * control lock. + */ +int uvc_ctrl_begin(struct uvc_video_device *video) +{ + return mutex_lock_interruptible(&video->ctrl_mutex) ? -ERESTARTSYS : 0; +} + +static int uvc_ctrl_commit_entity(struct uvc_device *dev, + struct uvc_entity *entity, int rollback) +{ + struct uvc_control *ctrl; + unsigned int i; + int ret; + + if (entity == NULL) + return 0; + + for (i = 0; i < entity->ncontrols; ++i) { + ctrl = &entity->controls[i]; + if (ctrl->info == NULL || !ctrl->dirty) + continue; + + if (!rollback) + ret = uvc_query_ctrl(dev, SET_CUR, ctrl->entity->id, + dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info->size); + else + ret = 0; + + if (rollback || ret < 0) + memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), + ctrl->info->size); + + if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) + ctrl->loaded = 0; + + ctrl->dirty = 0; + + if (ret < 0) + return ret; + } + + return 0; +} + +int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback) +{ + struct uvc_entity *entity; + int ret = 0; + + /* Find the control. */ + ret = uvc_ctrl_commit_entity(video->dev, video->processing, rollback); + if (ret < 0) + goto done; + + list_for_each_entry(entity, &video->iterms, chain) { + ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); + if (ret < 0) + goto done; + } + + list_for_each_entry(entity, &video->extensions, chain) { + ret = uvc_ctrl_commit_entity(video->dev, entity, rollback); + if (ret < 0) + goto done; + } + +done: + mutex_unlock(&video->ctrl_mutex); + return ret; +} + +int uvc_ctrl_get(struct uvc_video_device *video, + struct v4l2_ext_control *xctrl) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *mapping; + struct uvc_menu_info *menu; + unsigned int i; + int ret; + + ctrl = uvc_find_control(video, xctrl->id, &mapping); + if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) + return -EINVAL; + + if (!ctrl->loaded) { + ret = uvc_query_ctrl(video->dev, GET_CUR, ctrl->entity->id, + video->dev->intfnum, ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info->size); + if (ret < 0) + return ret; + + if ((ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) == 0) + ctrl->loaded = 1; + } + + xctrl->value = uvc_get_le_value( + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping); + + if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { + menu = mapping->menu_info; + for (i = 0; i < mapping->menu_count; ++i, ++menu) { + if (menu->value == xctrl->value) { + xctrl->value = i; + break; + } + } + } + + return 0; +} + +int uvc_ctrl_set(struct uvc_video_device *video, + struct v4l2_ext_control *xctrl) +{ + struct uvc_control *ctrl; + struct uvc_control_mapping *mapping; + s32 value = xctrl->value; + int ret; + + ctrl = uvc_find_control(video, xctrl->id, &mapping); + if (ctrl == NULL || (ctrl->info->flags & UVC_CONTROL_SET_CUR) == 0) + return -EINVAL; + + if (mapping->v4l2_type == V4L2_CTRL_TYPE_MENU) { + if (value < 0 || value >= mapping->menu_count) + return -EINVAL; + value = mapping->menu_info[value].value; + } + + if (!ctrl->loaded && (ctrl->info->size * 8) != mapping->size) { + if ((ctrl->info->flags & UVC_CONTROL_GET_CUR) == 0) { + memset(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + 0, ctrl->info->size); + } else { + ret = uvc_query_ctrl(video->dev, GET_CUR, + ctrl->entity->id, video->dev->intfnum, + ctrl->info->selector, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info->size); + if (ret < 0) + return ret; + } + + if ((ctrl->info->flags & UVC_CONTROL_AUTO_UPDATE) == 0) + ctrl->loaded = 1; + } + + if (!ctrl->dirty) { + memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + ctrl->info->size); + } + + uvc_set_le_value(value, + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), mapping); + + ctrl->dirty = 1; + ctrl->modified = 1; + return 0; +} + +/* -------------------------------------------------------------------------- + * Dynamic controls + */ + +int uvc_xu_ctrl_query(struct uvc_video_device *video, + struct uvc_xu_control *xctrl, int set) +{ + struct uvc_entity *entity; + struct uvc_control *ctrl = NULL; + unsigned int i, found = 0; + __u8 *data; + int ret; + + /* Find the extension unit. */ + list_for_each_entry(entity, &video->extensions, chain) { + if (entity->id == xctrl->unit) + break; + } + + if (entity->id != xctrl->unit) { + uvc_trace(UVC_TRACE_CONTROL, "Extension unit %u not found.\n", + xctrl->unit); + return -EINVAL; + } + + /* Find the control. */ + for (i = 0; i < entity->ncontrols; ++i) { + ctrl = &entity->controls[i]; + if (ctrl->info == NULL) + continue; + + if (ctrl->info->selector == xctrl->selector) { + found = 1; + break; + } + } + + if (!found) { + uvc_trace(UVC_TRACE_CONTROL, + "Control " UVC_GUID_FORMAT "/%u not found.\n", + UVC_GUID_ARGS(entity->extension.guidExtensionCode), + xctrl->selector); + return -EINVAL; + } + + /* Validate control data size. */ + if (ctrl->info->size != xctrl->size) + return -EINVAL; + + if ((set && !(ctrl->info->flags & UVC_CONTROL_SET_CUR)) || + (!set && !(ctrl->info->flags & UVC_CONTROL_GET_CUR))) + return -EINVAL; + + if (mutex_lock_interruptible(&video->ctrl_mutex)) + return -ERESTARTSYS; + + memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + xctrl->size); + data = uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT); + + if (set && copy_from_user(data, xctrl->data, xctrl->size)) { + ret = -EFAULT; + goto out; + } + + ret = uvc_query_ctrl(video->dev, set ? SET_CUR : GET_CUR, xctrl->unit, + video->dev->intfnum, xctrl->selector, data, + xctrl->size); + if (ret < 0) + goto out; + + if (!set && copy_to_user(xctrl->data, data, xctrl->size)) { + ret = -EFAULT; + goto out; + } + +out: + if (ret) + memcpy(uvc_ctrl_data(ctrl, UVC_CTRL_DATA_CURRENT), + uvc_ctrl_data(ctrl, UVC_CTRL_DATA_BACKUP), + xctrl->size); + + mutex_unlock(&video->ctrl_mutex); + return ret; +} + +/* -------------------------------------------------------------------------- + * Suspend/resume + */ + +/* + * Restore control values after resume, skipping controls that haven't been + * changed. + * + * TODO + * - Don't restore modified controls that are back to their default value. + * - Handle restore order (Auto-Exposure Mode should be restored before + * Exposure Time). + */ +int uvc_ctrl_resume_device(struct uvc_device *dev) +{ + struct uvc_control *ctrl; + struct uvc_entity *entity; + unsigned int i; + int ret; + + /* Walk the entities list and restore controls when possible. */ + list_for_each_entry(entity, &dev->entities, list) { + + for (i = 0; i < entity->ncontrols; ++i) { + ctrl = &entity->controls[i]; + + if (ctrl->info == NULL || !ctrl->modified || + (ctrl->info->flags & UVC_CONTROL_RESTORE) == 0) + continue; + + printk(KERN_INFO "restoring control " UVC_GUID_FORMAT + "/%u/%u\n", UVC_GUID_ARGS(ctrl->info->entity), + ctrl->info->index, ctrl->info->selector); + ctrl->dirty = 1; + } + + ret = uvc_ctrl_commit_entity(dev, entity, 0); + if (ret < 0) + return ret; + } + + return 0; +} + +/* -------------------------------------------------------------------------- + * Control and mapping handling + */ + +static void uvc_ctrl_add_ctrl(struct uvc_device *dev, + struct uvc_control_info *info) +{ + struct uvc_entity *entity; + struct uvc_control *ctrl = NULL; + int ret, found = 0; + unsigned int i; + + list_for_each_entry(entity, &dev->entities, list) { + if (!uvc_entity_match_guid(entity, info->entity)) + continue; + + for (i = 0; i < entity->ncontrols; ++i) { + ctrl = &entity->controls[i]; + if (ctrl->index == info->index) { + found = 1; + break; + } + } + + if (found) + break; + } + + if (!found) + return; + + if (UVC_ENTITY_TYPE(entity) == VC_EXTENSION_UNIT) { + /* Check if the device control information and length match + * the user supplied information. + */ + __u32 flags; + __le16 size; + __u8 inf; + + if ((ret = uvc_query_ctrl(dev, GET_LEN, ctrl->entity->id, + dev->intfnum, info->selector, (__u8 *)&size, 2)) < 0) { + uvc_trace(UVC_TRACE_CONTROL, "GET_LEN failed on " + "control " UVC_GUID_FORMAT "/%u (%d).\n", + UVC_GUID_ARGS(info->entity), info->selector, + ret); + return; + } + + if (info->size != le16_to_cpu(size)) { + uvc_trace(UVC_TRACE_CONTROL, "Control " UVC_GUID_FORMAT + "/%u size doesn't match user supplied " + "value.\n", UVC_GUID_ARGS(info->entity), + info->selector); + return; + } + + if ((ret = uvc_query_ctrl(dev, GET_INFO, ctrl->entity->id, + dev->intfnum, info->selector, &inf, 1)) < 0) { + uvc_trace(UVC_TRACE_CONTROL, "GET_INFO failed on " + "control " UVC_GUID_FORMAT "/%u (%d).\n", + UVC_GUID_ARGS(info->entity), info->selector, + ret); + return; + } + + flags = info->flags; + if (((flags & UVC_CONTROL_GET_CUR) && !(inf & (1 << 0))) || + ((flags & UVC_CONTROL_SET_CUR) && !(inf & (1 << 1)))) { + uvc_trace(UVC_TRACE_CONTROL, "Control " + UVC_GUID_FORMAT "/%u flags don't match " + "supported operations.\n", + UVC_GUID_ARGS(info->entity), info->selector); + return; + } + } + + ctrl->info = info; + ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_NDATA, GFP_KERNEL); + uvc_trace(UVC_TRACE_CONTROL, "Added control " UVC_GUID_FORMAT "/%u " + "to device %s entity %u\n", UVC_GUID_ARGS(ctrl->info->entity), + ctrl->info->selector, dev->udev->devpath, entity->id); +} + +/* + * Add an item to the UVC control information list, and instantiate a control + * structure for each device that supports the control. + */ +int uvc_ctrl_add_info(struct uvc_control_info *info) +{ + struct uvc_control_info *ctrl; + struct uvc_device *dev; + int ret = 0; + + /* Find matching controls by walking the devices, entities and + * controls list. + */ + mutex_lock(&uvc_driver.ctrl_mutex); + + /* First check if the list contains a control matching the new one. + * Bail out if it does. + */ + list_for_each_entry(ctrl, &uvc_driver.controls, list) { + if (memcmp(ctrl->entity, info->entity, 16)) + continue; + + if (ctrl->selector == info->selector) { + uvc_trace(UVC_TRACE_CONTROL, "Control " + UVC_GUID_FORMAT "/%u is already defined.\n", + UVC_GUID_ARGS(info->entity), info->selector); + ret = -EEXIST; + goto end; + } + if (ctrl->index == info->index) { + uvc_trace(UVC_TRACE_CONTROL, "Control " + UVC_GUID_FORMAT "/%u would overwrite index " + "%d.\n", UVC_GUID_ARGS(info->entity), + info->selector, info->index); + ret = -EEXIST; + goto end; + } + } + + list_for_each_entry(dev, &uvc_driver.devices, list) + uvc_ctrl_add_ctrl(dev, info); + + INIT_LIST_HEAD(&info->mappings); + list_add_tail(&info->list, &uvc_driver.controls); +end: + mutex_unlock(&uvc_driver.ctrl_mutex); + return ret; +} + +int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping) +{ + struct uvc_control_info *info; + struct uvc_control_mapping *map; + int ret = -EINVAL; + + if (mapping->id & ~V4L2_CTRL_ID_MASK) { + uvc_trace(UVC_TRACE_CONTROL, "Can't add mapping '%s' with " + "invalid control id 0x%08x\n", mapping->name, + mapping->id); + return -EINVAL; + } + + mutex_lock(&uvc_driver.ctrl_mutex); + list_for_each_entry(info, &uvc_driver.controls, list) { + if (memcmp(info->entity, mapping->entity, 16) || + info->selector != mapping->selector) + continue; + + if (info->size * 8 < mapping->size + mapping->offset) { + uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' would " + "overflow control " UVC_GUID_FORMAT "/%u\n", + mapping->name, UVC_GUID_ARGS(info->entity), + info->selector); + ret = -EOVERFLOW; + goto end; + } + + /* Check if the list contains a mapping matching the new one. + * Bail out if it does. + */ + list_for_each_entry(map, &info->mappings, list) { + if (map->id == mapping->id) { + uvc_trace(UVC_TRACE_CONTROL, "Mapping '%s' is " + "already defined.\n", mapping->name); + ret = -EEXIST; + goto end; + } + } + + mapping->ctrl = info; + list_add_tail(&mapping->list, &info->mappings); + uvc_trace(UVC_TRACE_CONTROL, "Adding mapping %s to control " + UVC_GUID_FORMAT "/%u.\n", mapping->name, + UVC_GUID_ARGS(info->entity), info->selector); + + ret = 0; + break; + } +end: + mutex_unlock(&uvc_driver.ctrl_mutex); + return ret; +} + +/* + * Initialize device controls. + */ +int uvc_ctrl_init_device(struct uvc_device *dev) +{ + struct uvc_control_info *info; + struct uvc_control *ctrl; + struct uvc_entity *entity; + unsigned int i; + + /* Walk the entities list and instantiate controls */ + list_for_each_entry(entity, &dev->entities, list) { + unsigned int bControlSize = 0, ncontrols = 0; + __u8 *bmControls = NULL; + + if (UVC_ENTITY_TYPE(entity) == VC_EXTENSION_UNIT) { + bmControls = entity->extension.bmControls; + bControlSize = entity->extension.bControlSize; + } else if (UVC_ENTITY_TYPE(entity) == VC_PROCESSING_UNIT) { + bmControls = entity->processing.bmControls; + bControlSize = entity->processing.bControlSize; + } else if (UVC_ENTITY_TYPE(entity) == ITT_CAMERA) { + bmControls = entity->camera.bmControls; + bControlSize = entity->camera.bControlSize; + } + + for (i = 0; i < bControlSize; ++i) + ncontrols += hweight8(bmControls[i]); + + if (ncontrols == 0) + continue; + + entity->controls = kzalloc(ncontrols*sizeof *ctrl, GFP_KERNEL); + if (entity->controls == NULL) + return -ENOMEM; + + entity->ncontrols = ncontrols; + + ctrl = entity->controls; + for (i = 0; i < bControlSize * 8; ++i) { + if (uvc_get_bit(bmControls, i) == 0) + continue; + + ctrl->entity = entity; + ctrl->index = i; + ctrl++; + } + } + + /* Walk the controls info list and associate them with the device + * controls, then add the device to the global device list. This has + * to be done while holding the controls lock, to make sure + * uvc_ctrl_add_info() will not get called in-between. + */ + mutex_lock(&uvc_driver.ctrl_mutex); + list_for_each_entry(info, &uvc_driver.controls, list) + uvc_ctrl_add_ctrl(dev, info); + + list_add_tail(&dev->list, &uvc_driver.devices); + mutex_unlock(&uvc_driver.ctrl_mutex); + + return 0; +} + +/* + * Cleanup device controls. + */ +void uvc_ctrl_cleanup_device(struct uvc_device *dev) +{ + struct uvc_entity *entity; + unsigned int i; + + /* Remove the device from the global devices list */ + mutex_lock(&uvc_driver.ctrl_mutex); + if (dev->list.next != NULL) + list_del(&dev->list); + mutex_unlock(&uvc_driver.ctrl_mutex); + + list_for_each_entry(entity, &dev->entities, list) { + for (i = 0; i < entity->ncontrols; ++i) + kfree(entity->controls[i].data); + + kfree(entity->controls); + } +} + +void uvc_ctrl_init(void) +{ + struct uvc_control_info *ctrl = uvc_ctrls; + struct uvc_control_info *cend = ctrl + ARRAY_SIZE(uvc_ctrls); + struct uvc_control_mapping *mapping = uvc_ctrl_mappings; + struct uvc_control_mapping *mend = + mapping + ARRAY_SIZE(uvc_ctrl_mappings); + + for (; ctrl < cend; ++ctrl) + uvc_ctrl_add_info(ctrl); + + for (; mapping < mend; ++mapping) + uvc_ctrl_add_mapping(mapping); +} diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c new file mode 100644 index 000000000000..60ced589f898 --- /dev/null +++ b/drivers/media/video/uvc/uvc_driver.c @@ -0,0 +1,1955 @@ +/* + * uvc_driver.c -- USB Video Class driver + * + * Copyright (C) 2005-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +/* + * This driver aims to support video input devices compliant with the 'USB + * Video Class' specification. + * + * The driver doesn't support the deprecated v4l1 interface. It implements the + * mmap capture method only, and doesn't do any image format conversion in + * software. If your user-space application doesn't support YUYV or MJPEG, fix + * it :-). Please note that the MJPEG data have been stripped from their + * Huffman tables (DHT marker), you will need to add it back if your JPEG + * codec can't handle MJPEG data. + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <linux/vmalloc.h> +#include <linux/wait.h> +#include <asm/atomic.h> + +#include <media/v4l2-common.h> + +#include "uvcvideo.h" + +#define DRIVER_AUTHOR "Laurent Pinchart <laurent.pinchart@skynet.be>" +#define DRIVER_DESC "USB Video Class driver" +#ifndef DRIVER_VERSION +#define DRIVER_VERSION "v0.1.0" +#endif + +static unsigned int uvc_quirks_param; +unsigned int uvc_trace_param; + +/* ------------------------------------------------------------------------ + * Control, formats, ... + */ + +static struct uvc_format_desc uvc_fmts[] = { + { + .name = "YUV 4:2:2 (YUYV)", + .guid = UVC_GUID_FORMAT_YUY2, + .fcc = V4L2_PIX_FMT_YUYV, + }, + { + .name = "YUV 4:2:0 (NV12)", + .guid = UVC_GUID_FORMAT_NV12, + .fcc = V4L2_PIX_FMT_NV12, + }, + { + .name = "MJPEG", + .guid = UVC_GUID_FORMAT_MJPEG, + .fcc = V4L2_PIX_FMT_MJPEG, + }, + { + .name = "YVU 4:2:0 (YV12)", + .guid = UVC_GUID_FORMAT_YV12, + .fcc = V4L2_PIX_FMT_YVU420, + }, + { + .name = "YUV 4:2:0 (I420)", + .guid = UVC_GUID_FORMAT_I420, + .fcc = V4L2_PIX_FMT_YUV420, + }, + { + .name = "YUV 4:2:2 (UYVY)", + .guid = UVC_GUID_FORMAT_UYVY, + .fcc = V4L2_PIX_FMT_UYVY, + }, + { + .name = "Greyscale", + .guid = UVC_GUID_FORMAT_Y800, + .fcc = V4L2_PIX_FMT_GREY, + }, + { + .name = "RGB Bayer", + .guid = UVC_GUID_FORMAT_BY8, + .fcc = V4L2_PIX_FMT_SBGGR8, + }, +}; + +/* ------------------------------------------------------------------------ + * Utility functions + */ + +struct usb_host_endpoint *uvc_find_endpoint(struct usb_host_interface *alts, + __u8 epaddr) +{ + struct usb_host_endpoint *ep; + unsigned int i; + + for (i = 0; i < alts->desc.bNumEndpoints; ++i) { + ep = &alts->endpoint[i]; + if (ep->desc.bEndpointAddress == epaddr) + return ep; + } + + return NULL; +} + +static struct uvc_format_desc *uvc_format_by_guid(const __u8 guid[16]) +{ + unsigned int len = ARRAY_SIZE(uvc_fmts); + unsigned int i; + + for (i = 0; i < len; ++i) { + if (memcmp(guid, uvc_fmts[i].guid, 16) == 0) + return &uvc_fmts[i]; + } + + return NULL; +} + +static __u32 uvc_colorspace(const __u8 primaries) +{ + static const __u8 colorprimaries[] = { + 0, + V4L2_COLORSPACE_SRGB, + V4L2_COLORSPACE_470_SYSTEM_M, + V4L2_COLORSPACE_470_SYSTEM_BG, + V4L2_COLORSPACE_SMPTE170M, + V4L2_COLORSPACE_SMPTE240M, + }; + + if (primaries < ARRAY_SIZE(colorprimaries)) + return colorprimaries[primaries]; + + return 0; +} + +/* Simplify a fraction using a simple continued fraction decomposition. The + * idea here is to convert fractions such as 333333/10000000 to 1/30 using + * 32 bit arithmetic only. The algorithm is not perfect and relies upon two + * arbitrary parameters to remove non-significative terms from the simple + * continued fraction decomposition. Using 8 and 333 for n_terms and threshold + * respectively seems to give nice results. + */ +void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, + unsigned int n_terms, unsigned int threshold) +{ + uint32_t *an; + uint32_t x, y, r; + unsigned int i, n; + + an = kmalloc(n_terms * sizeof *an, GFP_KERNEL); + if (an == NULL) + return; + + /* Convert the fraction to a simple continued fraction. See + * http://mathforum.org/dr.math/faq/faq.fractions.html + * Stop if the current term is bigger than or equal to the given + * threshold. + */ + x = *numerator; + y = *denominator; + + for (n = 0; n < n_terms && y != 0; ++n) { + an[n] = x / y; + if (an[n] >= threshold) { + if (n < 2) + n++; + break; + } + + r = x - an[n] * y; + x = y; + y = r; + } + + /* Expand the simple continued fraction back to an integer fraction. */ + x = 0; + y = 1; + + for (i = n; i > 0; --i) { + r = y; + y = an[i-1] * y + x; + x = r; + } + + *numerator = y; + *denominator = x; + kfree(an); +} + +/* Convert a fraction to a frame interval in 100ns multiples. The idea here is + * to compute numerator / denominator * 10000000 using 32 bit fixed point + * arithmetic only. + */ +uint32_t uvc_fraction_to_interval(uint32_t numerator, uint32_t denominator) +{ + uint32_t multiplier; + + /* Saturate the result if the operation would overflow. */ + if (denominator == 0 || + numerator/denominator >= ((uint32_t)-1)/10000000) + return (uint32_t)-1; + + /* Divide both the denominator and the multiplier by two until + * numerator * multiplier doesn't overflow. If anyone knows a better + * algorithm please let me know. + */ + multiplier = 10000000; + while (numerator > ((uint32_t)-1)/multiplier) { + multiplier /= 2; + denominator /= 2; + } + + return denominator ? numerator * multiplier / denominator : 0; +} + +/* ------------------------------------------------------------------------ + * Terminal and unit management + */ + +static struct uvc_entity *uvc_entity_by_id(struct uvc_device *dev, int id) +{ + struct uvc_entity *entity; + + list_for_each_entry(entity, &dev->entities, list) { + if (entity->id == id) + return entity; + } + + return NULL; +} + +static struct uvc_entity *uvc_entity_by_reference(struct uvc_device *dev, + int id, struct uvc_entity *entity) +{ + unsigned int i; + + if (entity == NULL) + entity = list_entry(&dev->entities, struct uvc_entity, list); + + list_for_each_entry_continue(entity, &dev->entities, list) { + switch (UVC_ENTITY_TYPE(entity)) { + case TT_STREAMING: + if (entity->output.bSourceID == id) + return entity; + break; + + case VC_PROCESSING_UNIT: + if (entity->processing.bSourceID == id) + return entity; + break; + + case VC_SELECTOR_UNIT: + for (i = 0; i < entity->selector.bNrInPins; ++i) + if (entity->selector.baSourceID[i] == id) + return entity; + break; + + case VC_EXTENSION_UNIT: + for (i = 0; i < entity->extension.bNrInPins; ++i) + if (entity->extension.baSourceID[i] == id) + return entity; + break; + } + } + + return NULL; +} + +/* ------------------------------------------------------------------------ + * Descriptors handling + */ + +static int uvc_parse_format(struct uvc_device *dev, + struct uvc_streaming *streaming, struct uvc_format *format, + __u32 **intervals, unsigned char *buffer, int buflen) +{ + struct usb_interface *intf = streaming->intf; + struct usb_host_interface *alts = intf->cur_altsetting; + struct uvc_format_desc *fmtdesc; + struct uvc_frame *frame; + const unsigned char *start = buffer; + unsigned int interval; + unsigned int i, n; + __u8 ftype; + + format->type = buffer[2]; + format->index = buffer[3]; + + switch (buffer[2]) { + case VS_FORMAT_UNCOMPRESSED: + case VS_FORMAT_FRAME_BASED: + if (buflen < 27) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d FORMAT error\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + /* Find the format descriptor from its GUID. */ + fmtdesc = uvc_format_by_guid(&buffer[5]); + + if (fmtdesc != NULL) { + strncpy(format->name, fmtdesc->name, + sizeof format->name); + format->fcc = fmtdesc->fcc; + } else { + uvc_printk(KERN_INFO, "Unknown video format " + UVC_GUID_FORMAT "\n", + UVC_GUID_ARGS(&buffer[5])); + snprintf(format->name, sizeof format->name, + UVC_GUID_FORMAT, UVC_GUID_ARGS(&buffer[5])); + format->fcc = 0; + } + + format->bpp = buffer[21]; + if (buffer[2] == VS_FORMAT_UNCOMPRESSED) { + ftype = VS_FRAME_UNCOMPRESSED; + } else { + ftype = VS_FRAME_FRAME_BASED; + if (buffer[27]) + format->flags = UVC_FMT_FLAG_COMPRESSED; + } + break; + + case VS_FORMAT_MJPEG: + if (buflen < 11) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d FORMAT error\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + strncpy(format->name, "MJPEG", sizeof format->name); + format->fcc = V4L2_PIX_FMT_MJPEG; + format->flags = UVC_FMT_FLAG_COMPRESSED; + format->bpp = 0; + ftype = VS_FRAME_MJPEG; + break; + + case VS_FORMAT_DV: + if (buflen < 9) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d FORMAT error\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + switch (buffer[8] & 0x7f) { + case 0: + strncpy(format->name, "SD-DV", sizeof format->name); + break; + case 1: + strncpy(format->name, "SDL-DV", sizeof format->name); + break; + case 2: + strncpy(format->name, "HD-DV", sizeof format->name); + break; + default: + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d: unknown DV format %u\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber, buffer[8]); + return -EINVAL; + } + + strncat(format->name, buffer[8] & (1 << 7) ? " 60Hz" : " 50Hz", + sizeof format->name); + + format->fcc = V4L2_PIX_FMT_DV; + format->flags = UVC_FMT_FLAG_COMPRESSED | UVC_FMT_FLAG_STREAM; + format->bpp = 0; + ftype = 0; + + /* Create a dummy frame descriptor. */ + frame = &format->frame[0]; + memset(&format->frame[0], 0, sizeof format->frame[0]); + frame->bFrameIntervalType = 1; + frame->dwDefaultFrameInterval = 1; + frame->dwFrameInterval = *intervals; + *(*intervals)++ = 1; + format->nframes = 1; + break; + + case VS_FORMAT_MPEG2TS: + case VS_FORMAT_STREAM_BASED: + /* Not supported yet. */ + default: + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d unsupported format %u\n", + dev->udev->devnum, alts->desc.bInterfaceNumber, + buffer[2]); + return -EINVAL; + } + + uvc_trace(UVC_TRACE_DESCR, "Found format %s.\n", format->name); + + buflen -= buffer[0]; + buffer += buffer[0]; + + /* Parse the frame descriptors. Only uncompressed, MJPEG and frame + * based formats have frame descriptors. + */ + while (buflen > 2 && buffer[2] == ftype) { + frame = &format->frame[format->nframes]; + + if (ftype != VS_FRAME_FRAME_BASED) + n = buflen > 25 ? buffer[25] : 0; + else + n = buflen > 21 ? buffer[21] : 0; + + n = n ? n : 3; + + if (buflen < 26 + 4*n) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d FRAME error\n", dev->udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + frame->bFrameIndex = buffer[3]; + frame->bmCapabilities = buffer[4]; + frame->wWidth = le16_to_cpup((__le16 *)&buffer[5]); + frame->wHeight = le16_to_cpup((__le16 *)&buffer[7]); + frame->dwMinBitRate = le32_to_cpup((__le32 *)&buffer[9]); + frame->dwMaxBitRate = le32_to_cpup((__le32 *)&buffer[13]); + if (ftype != VS_FRAME_FRAME_BASED) { + frame->dwMaxVideoFrameBufferSize = + le32_to_cpup((__le32 *)&buffer[17]); + frame->dwDefaultFrameInterval = + le32_to_cpup((__le32 *)&buffer[21]); + frame->bFrameIntervalType = buffer[25]; + } else { + frame->dwMaxVideoFrameBufferSize = 0; + frame->dwDefaultFrameInterval = + le32_to_cpup((__le32 *)&buffer[17]); + frame->bFrameIntervalType = buffer[21]; + } + frame->dwFrameInterval = *intervals; + + /* Several UVC chipsets screw up dwMaxVideoFrameBufferSize + * completely. Observed behaviours range from setting the + * value to 1.1x the actual frame size of hardwiring the + * 16 low bits to 0. This results in a higher than necessary + * memory usage as well as a wrong image size information. For + * uncompressed formats this can be fixed by computing the + * value from the frame size. + */ + if (!(format->flags & UVC_FMT_FLAG_COMPRESSED)) + frame->dwMaxVideoFrameBufferSize = format->bpp + * frame->wWidth * frame->wHeight / 8; + + /* Some bogus devices report dwMinFrameInterval equal to + * dwMaxFrameInterval and have dwFrameIntervalStep set to + * zero. Setting all null intervals to 1 fixes the problem and + * some other divisions by zero which could happen. + */ + for (i = 0; i < n; ++i) { + interval = le32_to_cpup((__le32 *)&buffer[26+4*i]); + *(*intervals)++ = interval ? interval : 1; + } + + /* Make sure that the default frame interval stays between + * the boundaries. + */ + n -= frame->bFrameIntervalType ? 1 : 2; + frame->dwDefaultFrameInterval = + min(frame->dwFrameInterval[n], + max(frame->dwFrameInterval[0], + frame->dwDefaultFrameInterval)); + + uvc_trace(UVC_TRACE_DESCR, "- %ux%u (%u.%u fps)\n", + frame->wWidth, frame->wHeight, + 10000000/frame->dwDefaultFrameInterval, + (100000000/frame->dwDefaultFrameInterval)%10); + + format->nframes++; + buflen -= buffer[0]; + buffer += buffer[0]; + } + + if (buflen > 2 && buffer[2] == VS_STILL_IMAGE_FRAME) { + buflen -= buffer[0]; + buffer += buffer[0]; + } + + if (buflen > 2 && buffer[2] == VS_COLORFORMAT) { + if (buflen < 6) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" + "interface %d COLORFORMAT error\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + format->colorspace = uvc_colorspace(buffer[3]); + + buflen -= buffer[0]; + buffer += buffer[0]; + } + + return buffer - start; +} + +static int uvc_parse_streaming(struct uvc_device *dev, + struct usb_interface *intf) +{ + struct uvc_streaming *streaming = NULL; + struct uvc_format *format; + struct uvc_frame *frame; + struct usb_host_interface *alts = &intf->altsetting[0]; + unsigned char *_buffer, *buffer = alts->extra; + int _buflen, buflen = alts->extralen; + unsigned int nformats = 0, nframes = 0, nintervals = 0; + unsigned int size, i, n, p; + __u32 *interval; + __u16 psize; + int ret = -EINVAL; + + if (intf->cur_altsetting->desc.bInterfaceSubClass + != SC_VIDEOSTREAMING) { + uvc_trace(UVC_TRACE_DESCR, "device %d interface %d isn't a " + "video streaming interface\n", dev->udev->devnum, + intf->altsetting[0].desc.bInterfaceNumber); + return -EINVAL; + } + + if (usb_driver_claim_interface(&uvc_driver.driver, intf, dev)) { + uvc_trace(UVC_TRACE_DESCR, "device %d interface %d is already " + "claimed\n", dev->udev->devnum, + intf->altsetting[0].desc.bInterfaceNumber); + return -EINVAL; + } + + streaming = kzalloc(sizeof *streaming, GFP_KERNEL); + if (streaming == NULL) { + usb_driver_release_interface(&uvc_driver.driver, intf); + return -EINVAL; + } + + mutex_init(&streaming->mutex); + streaming->intf = usb_get_intf(intf); + streaming->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; + + /* The Pico iMage webcam has its class-specific interface descriptors + * after the endpoint descriptors. + */ + if (buflen == 0) { + for (i = 0; i < alts->desc.bNumEndpoints; ++i) { + struct usb_host_endpoint *ep = &alts->endpoint[i]; + + if (ep->extralen == 0) + continue; + + if (ep->extralen > 2 && + ep->extra[1] == USB_DT_CS_INTERFACE) { + uvc_trace(UVC_TRACE_DESCR, "trying extra data " + "from endpoint %u.\n", i); + buffer = alts->endpoint[i].extra; + buflen = alts->endpoint[i].extralen; + break; + } + } + } + + /* Skip the standard interface descriptors. */ + while (buflen > 2 && buffer[1] != USB_DT_CS_INTERFACE) { + buflen -= buffer[0]; + buffer += buffer[0]; + } + + if (buflen <= 2) { + uvc_trace(UVC_TRACE_DESCR, "no class-specific streaming " + "interface descriptors found.\n"); + goto error; + } + + /* Parse the header descriptor. */ + if (buffer[2] == VS_OUTPUT_HEADER) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " + "%d OUTPUT HEADER descriptor is not supported.\n", + dev->udev->devnum, alts->desc.bInterfaceNumber); + goto error; + } else if (buffer[2] == VS_INPUT_HEADER) { + p = buflen >= 5 ? buffer[3] : 0; + n = buflen >= 12 ? buffer[12] : 0; + + if (buflen < 13 + p*n || buffer[2] != VS_INPUT_HEADER) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " + "interface %d INPUT HEADER descriptor is " + "invalid.\n", dev->udev->devnum, + alts->desc.bInterfaceNumber); + goto error; + } + + streaming->header.bNumFormats = p; + streaming->header.bEndpointAddress = buffer[6]; + streaming->header.bmInfo = buffer[7]; + streaming->header.bTerminalLink = buffer[8]; + streaming->header.bStillCaptureMethod = buffer[9]; + streaming->header.bTriggerSupport = buffer[10]; + streaming->header.bTriggerUsage = buffer[11]; + streaming->header.bControlSize = n; + + streaming->header.bmaControls = kmalloc(p*n, GFP_KERNEL); + if (streaming->header.bmaControls == NULL) { + ret = -ENOMEM; + goto error; + } + + memcpy(streaming->header.bmaControls, &buffer[13], p*n); + } else { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " + "%d HEADER descriptor not found.\n", dev->udev->devnum, + alts->desc.bInterfaceNumber); + goto error; + } + + buflen -= buffer[0]; + buffer += buffer[0]; + + _buffer = buffer; + _buflen = buflen; + + /* Count the format and frame descriptors. */ + while (_buflen > 2) { + switch (_buffer[2]) { + case VS_FORMAT_UNCOMPRESSED: + case VS_FORMAT_MJPEG: + case VS_FORMAT_FRAME_BASED: + nformats++; + break; + + case VS_FORMAT_DV: + /* DV format has no frame descriptor. We will create a + * dummy frame descriptor with a dummy frame interval. + */ + nformats++; + nframes++; + nintervals++; + break; + + case VS_FORMAT_MPEG2TS: + case VS_FORMAT_STREAM_BASED: + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming " + "interface %d FORMAT %u is not supported.\n", + dev->udev->devnum, + alts->desc.bInterfaceNumber, _buffer[2]); + break; + + case VS_FRAME_UNCOMPRESSED: + case VS_FRAME_MJPEG: + nframes++; + if (_buflen > 25) + nintervals += _buffer[25] ? _buffer[25] : 3; + break; + + case VS_FRAME_FRAME_BASED: + nframes++; + if (_buflen > 21) + nintervals += _buffer[21] ? _buffer[21] : 3; + break; + } + + _buflen -= _buffer[0]; + _buffer += _buffer[0]; + } + + if (nformats == 0) { + uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming interface " + "%d has no supported formats defined.\n", + dev->udev->devnum, alts->desc.bInterfaceNumber); + goto error; + } + + size = nformats * sizeof *format + nframes * sizeof *frame + + nintervals * sizeof *interval; + format = kzalloc(size, GFP_KERNEL); + if (format == NULL) { + ret = -ENOMEM; + goto error; + } + + frame = (struct uvc_frame *)&format[nformats]; + interval = (__u32 *)&frame[nframes]; + + streaming->format = format; + streaming->nformats = nformats; + + /* Parse the format descriptors. */ + while (buflen > 2) { + switch (buffer[2]) { + case VS_FORMAT_UNCOMPRESSED: + case VS_FORMAT_MJPEG: + case VS_FORMAT_DV: + case VS_FORMAT_FRAME_BASED: + format->frame = frame; + ret = uvc_parse_format(dev, streaming, format, + &interval, buffer, buflen); + if (ret < 0) + goto error; + + frame += format->nframes; + format++; + + buflen -= ret; + buffer += ret; + continue; + + default: + break; + } + + buflen -= buffer[0]; + buffer += buffer[0]; + } + + /* Parse the alternate settings to find the maximum bandwidth. */ + for (i = 0; i < intf->num_altsetting; ++i) { + struct usb_host_endpoint *ep; + alts = &intf->altsetting[i]; + ep = uvc_find_endpoint(alts, + streaming->header.bEndpointAddress); + if (ep == NULL) + continue; + + psize = le16_to_cpu(ep->desc.wMaxPacketSize); + psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); + if (psize > streaming->maxpsize) + streaming->maxpsize = psize; + } + + list_add_tail(&streaming->list, &dev->streaming); + return 0; + +error: + usb_driver_release_interface(&uvc_driver.driver, intf); + usb_put_intf(intf); + kfree(streaming->format); + kfree(streaming->header.bmaControls); + kfree(streaming); + return ret; +} + +/* Parse vendor-specific extensions. */ +static int uvc_parse_vendor_control(struct uvc_device *dev, + const unsigned char *buffer, int buflen) +{ + struct usb_device *udev = dev->udev; + struct usb_host_interface *alts = dev->intf->cur_altsetting; + struct uvc_entity *unit; + unsigned int n, p; + int handled = 0; + + switch (le16_to_cpu(dev->udev->descriptor.idVendor)) { + case 0x046d: /* Logitech */ + if (buffer[1] != 0x41 || buffer[2] != 0x01) + break; + + /* Logitech implements several vendor specific functions + * through vendor specific extension units (LXU). + * + * The LXU descriptors are similar to XU descriptors + * (see "USB Device Video Class for Video Devices", section + * 3.7.2.6 "Extension Unit Descriptor") with the following + * differences: + * + * ---------------------------------------------------------- + * 0 bLength 1 Number + * Size of this descriptor, in bytes: 24+p+n*2 + * ---------------------------------------------------------- + * 23+p+n bmControlsType N Bitmap + * Individual bits in the set are defined: + * 0: Absolute + * 1: Relative + * + * This bitset is mapped exactly the same as bmControls. + * ---------------------------------------------------------- + * 23+p+n*2 bReserved 1 Boolean + * ---------------------------------------------------------- + * 24+p+n*2 iExtension 1 Index + * Index of a string descriptor that describes this + * extension unit. + * ---------------------------------------------------------- + */ + p = buflen >= 22 ? buffer[21] : 0; + n = buflen >= 25 + p ? buffer[22+p] : 0; + + if (buflen < 25 + p + 2*n) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d EXTENSION_UNIT error\n", + udev->devnum, alts->desc.bInterfaceNumber); + break; + } + + unit = kzalloc(sizeof *unit + p + 2*n, GFP_KERNEL); + if (unit == NULL) + return -ENOMEM; + + unit->id = buffer[3]; + unit->type = VC_EXTENSION_UNIT; + memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); + unit->extension.bNumControls = buffer[20]; + unit->extension.bNrInPins = + le16_to_cpup((__le16 *)&buffer[21]); + unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; + memcpy(unit->extension.baSourceID, &buffer[22], p); + unit->extension.bControlSize = buffer[22+p]; + unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; + unit->extension.bmControlsType = (__u8 *)unit + sizeof *unit + + p + n; + memcpy(unit->extension.bmControls, &buffer[23+p], 2*n); + + if (buffer[24+p+2*n] != 0) + usb_string(udev, buffer[24+p+2*n], unit->name, + sizeof unit->name); + else + sprintf(unit->name, "Extension %u", buffer[3]); + + list_add_tail(&unit->list, &dev->entities); + handled = 1; + break; + } + + return handled; +} + +static int uvc_parse_standard_control(struct uvc_device *dev, + const unsigned char *buffer, int buflen) +{ + struct usb_device *udev = dev->udev; + struct uvc_entity *unit, *term; + struct usb_interface *intf; + struct usb_host_interface *alts = dev->intf->cur_altsetting; + unsigned int i, n, p, len; + __u16 type; + + switch (buffer[2]) { + case VC_HEADER: + n = buflen >= 12 ? buffer[11] : 0; + + if (buflen < 12 || buflen < 12 + n) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d HEADER error\n", udev->devnum, + alts->desc.bInterfaceNumber); + return -EINVAL; + } + + dev->uvc_version = le16_to_cpup((__le16 *)&buffer[3]); + dev->clock_frequency = le32_to_cpup((__le32 *)&buffer[7]); + + /* Parse all USB Video Streaming interfaces. */ + for (i = 0; i < n; ++i) { + intf = usb_ifnum_to_if(udev, buffer[12+i]); + if (intf == NULL) { + uvc_trace(UVC_TRACE_DESCR, "device %d " + "interface %d doesn't exists\n", + udev->devnum, i); + continue; + } + + uvc_parse_streaming(dev, intf); + } + break; + + case VC_INPUT_TERMINAL: + if (buflen < 8) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d INPUT_TERMINAL error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + /* Make sure the terminal type MSB is not null, otherwise it + * could be confused with a unit. + */ + type = le16_to_cpup((__le16 *)&buffer[4]); + if ((type & 0xff00) == 0) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d INPUT_TERMINAL %d has invalid " + "type 0x%04x, skipping\n", udev->devnum, + alts->desc.bInterfaceNumber, + buffer[3], type); + return 0; + } + + n = 0; + p = 0; + len = 8; + + if (type == ITT_CAMERA) { + n = buflen >= 15 ? buffer[14] : 0; + len = 15; + + } else if (type == ITT_MEDIA_TRANSPORT_INPUT) { + n = buflen >= 9 ? buffer[8] : 0; + p = buflen >= 10 + n ? buffer[9+n] : 0; + len = 10; + } + + if (buflen < len + n + p) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d INPUT_TERMINAL error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + term = kzalloc(sizeof *term + n + p, GFP_KERNEL); + if (term == NULL) + return -ENOMEM; + + term->id = buffer[3]; + term->type = type | UVC_TERM_INPUT; + + if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) { + term->camera.bControlSize = n; + term->camera.bmControls = (__u8 *)term + sizeof *term; + term->camera.wObjectiveFocalLengthMin = + le16_to_cpup((__le16 *)&buffer[8]); + term->camera.wObjectiveFocalLengthMax = + le16_to_cpup((__le16 *)&buffer[10]); + term->camera.wOcularFocalLength = + le16_to_cpup((__le16 *)&buffer[12]); + memcpy(term->camera.bmControls, &buffer[15], n); + } else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) { + term->media.bControlSize = n; + term->media.bmControls = (__u8 *)term + sizeof *term; + term->media.bTransportModeSize = p; + term->media.bmTransportModes = (__u8 *)term + + sizeof *term + n; + memcpy(term->media.bmControls, &buffer[9], n); + memcpy(term->media.bmTransportModes, &buffer[10+n], p); + } + + if (buffer[7] != 0) + usb_string(udev, buffer[7], term->name, + sizeof term->name); + else if (UVC_ENTITY_TYPE(term) == ITT_CAMERA) + sprintf(term->name, "Camera %u", buffer[3]); + else if (UVC_ENTITY_TYPE(term) == ITT_MEDIA_TRANSPORT_INPUT) + sprintf(term->name, "Media %u", buffer[3]); + else + sprintf(term->name, "Input %u", buffer[3]); + + list_add_tail(&term->list, &dev->entities); + break; + + case VC_OUTPUT_TERMINAL: + if (buflen < 9) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d OUTPUT_TERMINAL error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + /* Make sure the terminal type MSB is not null, otherwise it + * could be confused with a unit. + */ + type = le16_to_cpup((__le16 *)&buffer[4]); + if ((type & 0xff00) == 0) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d OUTPUT_TERMINAL %d has invalid " + "type 0x%04x, skipping\n", udev->devnum, + alts->desc.bInterfaceNumber, buffer[3], type); + return 0; + } + + term = kzalloc(sizeof *term, GFP_KERNEL); + if (term == NULL) + return -ENOMEM; + + term->id = buffer[3]; + term->type = type | UVC_TERM_OUTPUT; + term->output.bSourceID = buffer[7]; + + if (buffer[8] != 0) + usb_string(udev, buffer[8], term->name, + sizeof term->name); + else + sprintf(term->name, "Output %u", buffer[3]); + + list_add_tail(&term->list, &dev->entities); + break; + + case VC_SELECTOR_UNIT: + p = buflen >= 5 ? buffer[4] : 0; + + if (buflen < 5 || buflen < 6 + p) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d SELECTOR_UNIT error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + unit = kzalloc(sizeof *unit + p, GFP_KERNEL); + if (unit == NULL) + return -ENOMEM; + + unit->id = buffer[3]; + unit->type = buffer[2]; + unit->selector.bNrInPins = buffer[4]; + unit->selector.baSourceID = (__u8 *)unit + sizeof *unit; + memcpy(unit->selector.baSourceID, &buffer[5], p); + + if (buffer[5+p] != 0) + usb_string(udev, buffer[5+p], unit->name, + sizeof unit->name); + else + sprintf(unit->name, "Selector %u", buffer[3]); + + list_add_tail(&unit->list, &dev->entities); + break; + + case VC_PROCESSING_UNIT: + n = buflen >= 8 ? buffer[7] : 0; + p = dev->uvc_version >= 0x0110 ? 10 : 9; + + if (buflen < p + n) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d PROCESSING_UNIT error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + unit = kzalloc(sizeof *unit + n, GFP_KERNEL); + if (unit == NULL) + return -ENOMEM; + + unit->id = buffer[3]; + unit->type = buffer[2]; + unit->processing.bSourceID = buffer[4]; + unit->processing.wMaxMultiplier = + le16_to_cpup((__le16 *)&buffer[5]); + unit->processing.bControlSize = buffer[7]; + unit->processing.bmControls = (__u8 *)unit + sizeof *unit; + memcpy(unit->processing.bmControls, &buffer[8], n); + if (dev->uvc_version >= 0x0110) + unit->processing.bmVideoStandards = buffer[9+n]; + + if (buffer[8+n] != 0) + usb_string(udev, buffer[8+n], unit->name, + sizeof unit->name); + else + sprintf(unit->name, "Processing %u", buffer[3]); + + list_add_tail(&unit->list, &dev->entities); + break; + + case VC_EXTENSION_UNIT: + p = buflen >= 22 ? buffer[21] : 0; + n = buflen >= 24 + p ? buffer[22+p] : 0; + + if (buflen < 24 + p + n) { + uvc_trace(UVC_TRACE_DESCR, "device %d videocontrol " + "interface %d EXTENSION_UNIT error\n", + udev->devnum, alts->desc.bInterfaceNumber); + return -EINVAL; + } + + unit = kzalloc(sizeof *unit + p + n, GFP_KERNEL); + if (unit == NULL) + return -ENOMEM; + + unit->id = buffer[3]; + unit->type = buffer[2]; + memcpy(unit->extension.guidExtensionCode, &buffer[4], 16); + unit->extension.bNumControls = buffer[20]; + unit->extension.bNrInPins = + le16_to_cpup((__le16 *)&buffer[21]); + unit->extension.baSourceID = (__u8 *)unit + sizeof *unit; + memcpy(unit->extension.baSourceID, &buffer[22], p); + unit->extension.bControlSize = buffer[22+p]; + unit->extension.bmControls = (__u8 *)unit + sizeof *unit + p; + memcpy(unit->extension.bmControls, &buffer[23+p], n); + + if (buffer[23+p+n] != 0) + usb_string(udev, buffer[23+p+n], unit->name, + sizeof unit->name); + else + sprintf(unit->name, "Extension %u", buffer[3]); + + list_add_tail(&unit->list, &dev->entities); + break; + + default: + uvc_trace(UVC_TRACE_DESCR, "Found an unknown CS_INTERFACE " + "descriptor (%u)\n", buffer[2]); + break; + } + + return 0; +} + +static int uvc_parse_control(struct uvc_device *dev) +{ + struct usb_host_interface *alts = dev->intf->cur_altsetting; + unsigned char *buffer = alts->extra; + int buflen = alts->extralen; + int ret; + + /* Parse the default alternate setting only, as the UVC specification + * defines a single alternate setting, the default alternate setting + * zero. + */ + + while (buflen > 2) { + if (uvc_parse_vendor_control(dev, buffer, buflen) || + buffer[1] != USB_DT_CS_INTERFACE) + goto next_descriptor; + + if ((ret = uvc_parse_standard_control(dev, buffer, buflen)) < 0) + return ret; + +next_descriptor: + buflen -= buffer[0]; + buffer += buffer[0]; + } + + /* Check if the optional status endpoint is present. */ + if (alts->desc.bNumEndpoints == 1) { + struct usb_host_endpoint *ep = &alts->endpoint[0]; + struct usb_endpoint_descriptor *desc = &ep->desc; + + if (usb_endpoint_is_int_in(desc) && + le16_to_cpu(desc->wMaxPacketSize) >= 8 && + desc->bInterval != 0) { + uvc_trace(UVC_TRACE_DESCR, "Found a Status endpoint " + "(addr %02x).\n", desc->bEndpointAddress); + dev->int_ep = ep; + } + } + + return 0; +} + +/* ------------------------------------------------------------------------ + * USB probe and disconnect + */ + +/* + * Unregister the video devices. + */ +static void uvc_unregister_video(struct uvc_device *dev) +{ + if (dev->video.vdev) { + if (dev->video.vdev->minor == -1) + video_device_release(dev->video.vdev); + else + video_unregister_device(dev->video.vdev); + dev->video.vdev = NULL; + } +} + +/* + * Scan the UVC descriptors to locate a chain starting at an Output Terminal + * and containing the following units: + * + * - a USB Streaming Output Terminal + * - zero or one Processing Unit + * - zero, one or mode single-input Selector Units + * - zero or one multiple-input Selector Units, provided all inputs are + * connected to input terminals + * - zero, one or mode single-input Extension Units + * - one Camera Input Terminal, or one or more External terminals. + * + * A side forward scan is made on each detected entity to check for additional + * extension units. + */ +static int uvc_scan_chain_entity(struct uvc_video_device *video, + struct uvc_entity *entity) +{ + switch (UVC_ENTITY_TYPE(entity)) { + case VC_EXTENSION_UNIT: + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- XU %d", entity->id); + + if (entity->extension.bNrInPins != 1) { + uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has more " + "than 1 input pin.\n", entity->id); + return -1; + } + + list_add_tail(&entity->chain, &video->extensions); + break; + + case VC_PROCESSING_UNIT: + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- PU %d", entity->id); + + if (video->processing != NULL) { + uvc_trace(UVC_TRACE_DESCR, "Found multiple " + "Processing Units in chain.\n"); + return -1; + } + + video->processing = entity; + break; + + case VC_SELECTOR_UNIT: + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- SU %d", entity->id); + + /* Single-input selector units are ignored. */ + if (entity->selector.bNrInPins == 1) + break; + + if (video->selector != NULL) { + uvc_trace(UVC_TRACE_DESCR, "Found multiple Selector " + "Units in chain.\n"); + return -1; + } + + video->selector = entity; + break; + + case ITT_VENDOR_SPECIFIC: + case ITT_CAMERA: + case ITT_MEDIA_TRANSPORT_INPUT: + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- IT %d\n", entity->id); + + list_add_tail(&entity->chain, &video->iterms); + break; + + default: + uvc_trace(UVC_TRACE_DESCR, "Unsupported entity type " + "0x%04x found in chain.\n", UVC_ENTITY_TYPE(entity)); + return -1; + } + + return 0; +} + +static int uvc_scan_chain_forward(struct uvc_video_device *video, + struct uvc_entity *entity, struct uvc_entity *prev) +{ + struct uvc_entity *forward; + int found; + + /* Forward scan */ + forward = NULL; + found = 0; + + while (1) { + forward = uvc_entity_by_reference(video->dev, entity->id, + forward); + if (forward == NULL) + break; + + if (UVC_ENTITY_TYPE(forward) != VC_EXTENSION_UNIT || + forward == prev) + continue; + + if (forward->extension.bNrInPins != 1) { + uvc_trace(UVC_TRACE_DESCR, "Extension unit %d has" + "more than 1 input pin.\n", entity->id); + return -1; + } + + list_add_tail(&forward->chain, &video->extensions); + if (uvc_trace_param & UVC_TRACE_PROBE) { + if (!found) + printk(" (-> XU"); + + printk(" %d", forward->id); + found = 1; + } + } + if (found) + printk(")"); + + return 0; +} + +static int uvc_scan_chain_backward(struct uvc_video_device *video, + struct uvc_entity *entity) +{ + struct uvc_entity *term; + int id = -1, i; + + switch (UVC_ENTITY_TYPE(entity)) { + case VC_EXTENSION_UNIT: + id = entity->extension.baSourceID[0]; + break; + + case VC_PROCESSING_UNIT: + id = entity->processing.bSourceID; + break; + + case VC_SELECTOR_UNIT: + /* Single-input selector units are ignored. */ + if (entity->selector.bNrInPins == 1) { + id = entity->selector.baSourceID[0]; + break; + } + + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" <- IT"); + + video->selector = entity; + for (i = 0; i < entity->selector.bNrInPins; ++i) { + id = entity->selector.baSourceID[i]; + term = uvc_entity_by_id(video->dev, id); + if (term == NULL || !UVC_ENTITY_IS_ITERM(term)) { + uvc_trace(UVC_TRACE_DESCR, "Selector unit %d " + "input %d isn't connected to an " + "input terminal\n", entity->id, i); + return -1; + } + + if (uvc_trace_param & UVC_TRACE_PROBE) + printk(" %d", term->id); + + list_add_tail(&term->chain, &video->iterms); + uvc_scan_chain_forward(video, term, entity); + } + + if (uvc_trace_param & UVC_TRACE_PROBE) + printk("\n"); + + id = 0; + break; + } + + return id; +} + +static int uvc_scan_chain(struct uvc_video_device *video) +{ + struct uvc_entity *entity, *prev; + int id; + + entity = video->oterm; + uvc_trace(UVC_TRACE_PROBE, "Scanning UVC chain: OT %d", entity->id); + id = entity->output.bSourceID; + while (id != 0) { + prev = entity; + entity = uvc_entity_by_id(video->dev, id); + if (entity == NULL) { + uvc_trace(UVC_TRACE_DESCR, "Found reference to " + "unknown entity %d.\n", id); + return -1; + } + + /* Process entity */ + if (uvc_scan_chain_entity(video, entity) < 0) + return -1; + + /* Forward scan */ + if (uvc_scan_chain_forward(video, entity, prev) < 0) + return -1; + + /* Stop when a terminal is found. */ + if (!UVC_ENTITY_IS_UNIT(entity)) + break; + + /* Backward scan */ + id = uvc_scan_chain_backward(video, entity); + if (id < 0) + return id; + } + + /* Initialize the video buffers queue. */ + uvc_queue_init(&video->queue); + + return 0; +} + +/* + * Register the video devices. + * + * The driver currently supports a single video device per control interface + * only. The terminal and units must match the following structure: + * + * ITT_CAMERA -> VC_PROCESSING_UNIT -> VC_EXTENSION_UNIT{0,n} -> TT_STREAMING + * + * The Extension Units, if present, must have a single input pin. The + * Processing Unit and Extension Units can be in any order. Additional + * Extension Units connected to the main chain as single-unit branches are + * also supported. + */ +static int uvc_register_video(struct uvc_device *dev) +{ + struct video_device *vdev; + struct uvc_entity *term; + int found = 0, ret; + + /* Check if the control interface matches the structure we expect. */ + list_for_each_entry(term, &dev->entities, list) { + struct uvc_streaming *streaming; + + if (UVC_ENTITY_TYPE(term) != TT_STREAMING) + continue; + + memset(&dev->video, 0, sizeof dev->video); + mutex_init(&dev->video.ctrl_mutex); + INIT_LIST_HEAD(&dev->video.iterms); + INIT_LIST_HEAD(&dev->video.extensions); + dev->video.oterm = term; + dev->video.dev = dev; + if (uvc_scan_chain(&dev->video) < 0) + continue; + + list_for_each_entry(streaming, &dev->streaming, list) { + if (streaming->header.bTerminalLink == term->id) { + dev->video.streaming = streaming; + found = 1; + break; + } + } + + if (found) + break; + } + + if (!found) { + uvc_printk(KERN_INFO, "No valid video chain found.\n"); + return -1; + } + + if (uvc_trace_param & UVC_TRACE_PROBE) { + uvc_printk(KERN_INFO, "Found a valid video chain ("); + list_for_each_entry(term, &dev->video.iterms, chain) { + printk("%d", term->id); + if (term->chain.next != &dev->video.iterms) + printk(","); + } + printk(" -> %d).\n", dev->video.oterm->id); + } + + /* Initialize the streaming interface with default streaming + * parameters. + */ + if ((ret = uvc_video_init(&dev->video)) < 0) { + uvc_printk(KERN_ERR, "Failed to initialize the device " + "(%d).\n", ret); + return ret; + } + + /* Register the device with V4L. */ + vdev = video_device_alloc(); + if (vdev == NULL) + return -1; + + /* We already hold a reference to dev->udev. The video device will be + * unregistered before the reference is released, so we don't need to + * get another one. + */ + vdev->dev = &dev->intf->dev; + vdev->type = 0; + vdev->type2 = 0; + vdev->minor = -1; + vdev->fops = &uvc_fops; + vdev->release = video_device_release; + strncpy(vdev->name, dev->name, sizeof vdev->name); + + /* Set the driver data before calling video_register_device, otherwise + * uvc_v4l2_open might race us. + * + * FIXME: usb_set_intfdata hasn't been called so far. Is that a + * problem ? Does any function which could be called here get + * a pointer to the usb_interface ? + */ + dev->video.vdev = vdev; + video_set_drvdata(vdev, &dev->video); + + if (video_register_device(vdev, VFL_TYPE_GRABBER, -1) < 0) { + dev->video.vdev = NULL; + video_device_release(vdev); + return -1; + } + + return 0; +} + +/* + * Delete the UVC device. + * + * Called by the kernel when the last reference to the uvc_device structure + * is released. + * + * Unregistering the video devices is done here because every opened instance + * must be closed before the device can be unregistered. An alternative would + * have been to use another reference count for uvc_v4l2_open/uvc_release, and + * unregister the video devices on disconnect when that reference count drops + * to zero. + * + * As this function is called after or during disconnect(), all URBs have + * already been canceled by the USB core. There is no need to kill the + * interrupt URB manually. + */ +void uvc_delete(struct kref *kref) +{ + struct uvc_device *dev = container_of(kref, struct uvc_device, kref); + struct list_head *p, *n; + + /* Unregister the video device */ + uvc_unregister_video(dev); + usb_put_intf(dev->intf); + usb_put_dev(dev->udev); + + uvc_status_cleanup(dev); + uvc_ctrl_cleanup_device(dev); + + list_for_each_safe(p, n, &dev->entities) { + struct uvc_entity *entity; + entity = list_entry(p, struct uvc_entity, list); + kfree(entity); + } + + list_for_each_safe(p, n, &dev->streaming) { + struct uvc_streaming *streaming; + streaming = list_entry(p, struct uvc_streaming, list); + usb_driver_release_interface(&uvc_driver.driver, + streaming->intf); + usb_put_intf(streaming->intf); + kfree(streaming->format); + kfree(streaming->header.bmaControls); + kfree(streaming); + } + + kfree(dev); +} + +static int uvc_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + struct usb_device *udev = interface_to_usbdev(intf); + struct uvc_device *dev; + int ret; + + if (id->idVendor && id->idProduct) + uvc_trace(UVC_TRACE_PROBE, "Probing known UVC device %s " + "(%04x:%04x)\n", udev->devpath, id->idVendor, + id->idProduct); + else + uvc_trace(UVC_TRACE_PROBE, "Probing generic UVC device %s\n", + udev->devpath); + + /* Allocate memory for the device and initialize it */ + if ((dev = kzalloc(sizeof *dev, GFP_KERNEL)) == NULL) + return -ENOMEM; + + INIT_LIST_HEAD(&dev->entities); + INIT_LIST_HEAD(&dev->streaming); + kref_init(&dev->kref); + + dev->udev = usb_get_dev(udev); + dev->intf = usb_get_intf(intf); + dev->intfnum = intf->cur_altsetting->desc.bInterfaceNumber; + dev->quirks = id->driver_info | uvc_quirks_param; + + if (udev->product != NULL) + strncpy(dev->name, udev->product, sizeof dev->name); + else + snprintf(dev->name, sizeof dev->name, + "UVC Camera (%04x:%04x)", + le16_to_cpu(udev->descriptor.idVendor), + le16_to_cpu(udev->descriptor.idProduct)); + + /* Parse the Video Class control descriptor */ + if (uvc_parse_control(dev) < 0) { + uvc_trace(UVC_TRACE_PROBE, "Unable to parse UVC " + "descriptors.\n"); + goto error; + } + + uvc_printk(KERN_INFO, "Found UVC %u.%02u device %s (%04x:%04x)\n", + dev->uvc_version >> 8, dev->uvc_version & 0xff, + udev->product ? udev->product : "<unnamed>", + le16_to_cpu(udev->descriptor.idVendor), + le16_to_cpu(udev->descriptor.idProduct)); + + if (uvc_quirks_param != 0) { + uvc_printk(KERN_INFO, "Forcing device quirks 0x%x by module " + "parameter for testing purpose.\n", uvc_quirks_param); + uvc_printk(KERN_INFO, "Please report required quirks to the " + "linux-uvc-devel mailing list.\n"); + } + + /* Initialize controls */ + if (uvc_ctrl_init_device(dev) < 0) + goto error; + + /* Register the video devices */ + if (uvc_register_video(dev) < 0) + goto error; + + /* Save our data pointer in the interface data */ + usb_set_intfdata(intf, dev); + + /* Initialize the interrupt URB */ + if ((ret = uvc_status_init(dev)) < 0) { + uvc_printk(KERN_INFO, "Unable to initialize the status " + "endpoint (%d), status interrupt will not be " + "supported.\n", ret); + } + + uvc_trace(UVC_TRACE_PROBE, "UVC device initialized.\n"); + return 0; + +error: + kref_put(&dev->kref, uvc_delete); + return -ENODEV; +} + +static void uvc_disconnect(struct usb_interface *intf) +{ + struct uvc_device *dev = usb_get_intfdata(intf); + + /* Set the USB interface data to NULL. This can be done outside the + * lock, as there's no other reader. + */ + usb_set_intfdata(intf, NULL); + + if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOSTREAMING) + return; + + /* uvc_v4l2_open() might race uvc_disconnect(). A static driver-wide + * lock is needed to prevent uvc_disconnect from releasing its + * reference to the uvc_device instance after uvc_v4l2_open() received + * the pointer to the device (video_devdata) but before it got the + * chance to increase the reference count (kref_get). + */ + mutex_lock(&uvc_driver.open_mutex); + + dev->state |= UVC_DEV_DISCONNECTED; + kref_put(&dev->kref, uvc_delete); + + mutex_unlock(&uvc_driver.open_mutex); +} + +static int uvc_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct uvc_device *dev = usb_get_intfdata(intf); + + uvc_trace(UVC_TRACE_SUSPEND, "Suspending interface %u\n", + intf->cur_altsetting->desc.bInterfaceNumber); + + /* Controls are cached on the fly so they don't need to be saved. */ + if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) + return uvc_status_suspend(dev); + + if (dev->video.streaming->intf != intf) { + uvc_trace(UVC_TRACE_SUSPEND, "Suspend: video streaming USB " + "interface mismatch.\n"); + return -EINVAL; + } + + return uvc_video_suspend(&dev->video); +} + +static int uvc_resume(struct usb_interface *intf) +{ + struct uvc_device *dev = usb_get_intfdata(intf); + int ret; + + uvc_trace(UVC_TRACE_SUSPEND, "Resuming interface %u\n", + intf->cur_altsetting->desc.bInterfaceNumber); + + if (intf->cur_altsetting->desc.bInterfaceSubClass == SC_VIDEOCONTROL) { + if ((ret = uvc_ctrl_resume_device(dev)) < 0) + return ret; + + return uvc_status_resume(dev); + } + + if (dev->video.streaming->intf != intf) { + uvc_trace(UVC_TRACE_SUSPEND, "Resume: video streaming USB " + "interface mismatch.\n"); + return -EINVAL; + } + + return uvc_video_resume(&dev->video); +} + +/* ------------------------------------------------------------------------ + * Driver initialization and cleanup + */ + +/* + * The Logitech cameras listed below have their interface class set to + * VENDOR_SPEC because they don't announce themselves as UVC devices, even + * though they are compliant. + */ +static struct usb_device_id uvc_ids[] = { + /* ALi M5606 (Clevo M540SR) */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x0402, + .idProduct = 0x5606, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Creative Live! Optia */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x041e, + .idProduct = 0x4057, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Microsoft Lifecam NX-6000 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x045e, + .idProduct = 0x00f8, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Microsoft Lifecam VX-7000 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x045e, + .idProduct = 0x0723, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Logitech Quickcam Fusion */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c1, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Logitech Quickcam Orbit MP */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c2, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Logitech Quickcam Pro for Notebook */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c3, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Logitech Quickcam Pro 5000 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c5, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Logitech Quickcam OEM Dell Notebook */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c6, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Logitech Quickcam OEM Cisco VT Camera II */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x046d, + .idProduct = 0x08c7, + .bInterfaceClass = USB_CLASS_VENDOR_SPEC, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0 }, + /* Apple Built-In iSight */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x05ac, + .idProduct = 0x8501, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX + | UVC_QUIRK_BUILTIN_ISIGHT }, + /* Genesys Logic USB 2.0 PC Camera */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x05e3, + .idProduct = 0x0505, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_STREAM_NO_FID }, + /* Silicon Motion SM371 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x090c, + .idProduct = 0xb371, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* MT6227 */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x0e8d, + .idProduct = 0x0004, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Syntek (HP Spartan) */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x174f, + .idProduct = 0x5212, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_STREAM_NO_FID }, + /* Syntek (Asus U3S) */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x174f, + .idProduct = 0x8a33, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_STREAM_NO_FID }, + /* Ecamm Pico iMage */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x18cd, + .idProduct = 0xcafe, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_EXTRAFIELDS }, + /* Bodelin ProScopeHR */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_DEV_HI + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x19ab, + .idProduct = 0x1000, + .bcdDevice_hi = 0x0126, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_STATUS_INTERVAL }, + /* SiGma Micro USB Web Camera */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x1c4f, + .idProduct = 0x3000, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX + | UVC_QUIRK_IGNORE_SELECTOR_UNIT}, + /* Acer OEM Webcam - Unknown vendor */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x5986, + .idProduct = 0x0100, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Packard Bell OEM Webcam */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x5986, + .idProduct = 0x0101, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Acer Crystal Eye webcam */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x5986, + .idProduct = 0x0102, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Acer OrbiCam - Unknown vendor */ + { .match_flags = USB_DEVICE_ID_MATCH_DEVICE + | USB_DEVICE_ID_MATCH_INT_INFO, + .idVendor = 0x5986, + .idProduct = 0x0200, + .bInterfaceClass = USB_CLASS_VIDEO, + .bInterfaceSubClass = 1, + .bInterfaceProtocol = 0, + .driver_info = UVC_QUIRK_PROBE_MINMAX }, + /* Generic USB Video Class */ + { USB_INTERFACE_INFO(USB_CLASS_VIDEO, 1, 0) }, + {} +}; + +MODULE_DEVICE_TABLE(usb, uvc_ids); + +struct uvc_driver uvc_driver = { + .driver = { + .name = "uvcvideo", + .probe = uvc_probe, + .disconnect = uvc_disconnect, + .suspend = uvc_suspend, + .resume = uvc_resume, + .id_table = uvc_ids, + .supports_autosuspend = 1, + }, +}; + +static int __init uvc_init(void) +{ + int result; + + INIT_LIST_HEAD(&uvc_driver.devices); + INIT_LIST_HEAD(&uvc_driver.controls); + mutex_init(&uvc_driver.open_mutex); + mutex_init(&uvc_driver.ctrl_mutex); + + uvc_ctrl_init(); + + result = usb_register(&uvc_driver.driver); + if (result == 0) + printk(KERN_INFO DRIVER_DESC " (" DRIVER_VERSION ")\n"); + return result; +} + +static void __exit uvc_cleanup(void) +{ + usb_deregister(&uvc_driver.driver); +} + +module_init(uvc_init); +module_exit(uvc_cleanup); + +module_param_named(quirks, uvc_quirks_param, uint, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(quirks, "Forced device quirks"); +module_param_named(trace, uvc_trace_param, uint, S_IRUGO|S_IWUSR); +MODULE_PARM_DESC(trace, "Trace level bitmask"); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRIVER_VERSION); diff --git a/drivers/media/video/uvc/uvc_isight.c b/drivers/media/video/uvc/uvc_isight.c new file mode 100644 index 000000000000..37bdefdbead5 --- /dev/null +++ b/drivers/media/video/uvc/uvc_isight.c @@ -0,0 +1,134 @@ +/* + * uvc_isight.c -- USB Video Class driver - iSight support + * + * Copyright (C) 2006-2007 + * Ivan N. Zlatev <contact@i-nz.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/usb.h> +#include <linux/kernel.h> +#include <linux/mm.h> + +#include "uvcvideo.h" + +/* Built-in iSight webcams implements most of UVC 1.0 except a + * different packet format. Instead of sending a header at the + * beginning of each isochronous transfer payload, the webcam sends a + * single header per image (on its own in a packet), followed by + * packets containing data only. + * + * Offset Size (bytes) Description + * ------------------------------------------------------------------ + * 0x00 1 Header length + * 0x01 1 Flags (UVC-compliant) + * 0x02 4 Always equal to '11223344' + * 0x06 8 Always equal to 'deadbeefdeadface' + * 0x0e 16 Unknown + * + * The header can be prefixed by an optional, unknown-purpose byte. + */ + +static int isight_decode(struct uvc_video_queue *queue, struct uvc_buffer *buf, + const __u8 *data, unsigned int len) +{ + static const __u8 hdr[] = { + 0x11, 0x22, 0x33, 0x44, + 0xde, 0xad, 0xbe, 0xef, + 0xde, 0xad, 0xfa, 0xce + }; + + unsigned int maxlen, nbytes; + __u8 *mem; + int is_header = 0; + + if (buf == NULL) + return 0; + + if ((len >= 14 && memcmp(&data[2], hdr, 12) == 0) || + (len >= 15 && memcmp(&data[3], hdr, 12) == 0)) { + uvc_trace(UVC_TRACE_FRAME, "iSight header found\n"); + is_header = 1; + } + + /* Synchronize to the input stream by waiting for a header packet. */ + if (buf->state != UVC_BUF_STATE_ACTIVE) { + if (!is_header) { + uvc_trace(UVC_TRACE_FRAME, "Dropping packet (out of " + "sync).\n"); + return 0; + } + + buf->state = UVC_BUF_STATE_ACTIVE; + } + + /* Mark the buffer as done if we're at the beginning of a new frame. + * + * Empty buffers (bytesused == 0) don't trigger end of frame detection + * as it doesn't make sense to return an empty buffer. + */ + if (is_header && buf->buf.bytesused != 0) { + buf->state = UVC_BUF_STATE_DONE; + return -EAGAIN; + } + + /* Copy the video data to the buffer. Skip header packets, as they + * contain no data. + */ + if (!is_header) { + maxlen = buf->buf.length - buf->buf.bytesused; + mem = queue->mem + buf->buf.m.offset + buf->buf.bytesused; + nbytes = min(len, maxlen); + memcpy(mem, data, nbytes); + buf->buf.bytesused += nbytes; + + if (len > maxlen || buf->buf.bytesused == buf->buf.length) { + uvc_trace(UVC_TRACE_FRAME, "Frame complete " + "(overflow).\n"); + buf->state = UVC_BUF_STATE_DONE; + } + } + + return 0; +} + +void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video, + struct uvc_buffer *buf) +{ + int ret, i; + + for (i = 0; i < urb->number_of_packets; ++i) { + if (urb->iso_frame_desc[i].status < 0) { + uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame " + "lost (%d).\n", + urb->iso_frame_desc[i].status); + } + + /* Decode the payload packet. + * uvc_video_decode is entered twice when a frame transition + * has been detected because the end of frame can only be + * reliably detected when the first packet of the new frame + * is processed. The first pass detects the transition and + * closes the previous frame's buffer, the second pass + * processes the data of the first payload of the new frame. + */ + do { + ret = isight_decode(&video->queue, buf, + urb->transfer_buffer + + urb->iso_frame_desc[i].offset, + urb->iso_frame_desc[i].actual_length); + + if (buf == NULL) + break; + + if (buf->state == UVC_BUF_STATE_DONE || + buf->state == UVC_BUF_STATE_ERROR) + buf = uvc_queue_next_buffer(&video->queue, buf); + } while (ret == -EAGAIN); + } +} diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c new file mode 100644 index 000000000000..0923f0e3b3d4 --- /dev/null +++ b/drivers/media/video/uvc/uvc_queue.c @@ -0,0 +1,477 @@ +/* + * uvc_queue.c -- USB Video Class driver - Buffers management + * + * Copyright (C) 2005-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <linux/vmalloc.h> +#include <linux/wait.h> +#include <asm/atomic.h> + +#include "uvcvideo.h" + +/* ------------------------------------------------------------------------ + * Video buffers queue management. + * + * Video queues is initialized by uvc_queue_init(). The function performs + * basic initialization of the uvc_video_queue struct and never fails. + * + * Video buffer allocation and freeing are performed by uvc_alloc_buffers and + * uvc_free_buffers respectively. The former acquires the video queue lock, + * while the later must be called with the lock held (so that allocation can + * free previously allocated buffers). Trying to free buffers that are mapped + * to user space will return -EBUSY. + * + * Video buffers are managed using two queues. However, unlike most USB video + * drivers which use an in queue and an out queue, we use a main queue which + * holds all queued buffers (both 'empty' and 'done' buffers), and an irq + * queue which holds empty buffers. This design (copied from video-buf) + * minimizes locking in interrupt, as only one queue is shared between + * interrupt and user contexts. + * + * Use cases + * --------- + * + * Unless stated otherwise, all operations which modify the irq buffers queue + * are protected by the irq spinlock. + * + * 1. The user queues the buffers, starts streaming and dequeues a buffer. + * + * The buffers are added to the main and irq queues. Both operations are + * protected by the queue lock, and the latert is protected by the irq + * spinlock as well. + * + * The completion handler fetches a buffer from the irq queue and fills it + * with video data. If no buffer is available (irq queue empty), the handler + * returns immediately. + * + * When the buffer is full, the completion handler removes it from the irq + * queue, marks it as ready (UVC_BUF_STATE_DONE) and wake its wait queue. + * At that point, any process waiting on the buffer will be woken up. If a + * process tries to dequeue a buffer after it has been marked ready, the + * dequeing will succeed immediately. + * + * 2. Buffers are queued, user is waiting on a buffer and the device gets + * disconnected. + * + * When the device is disconnected, the kernel calls the completion handler + * with an appropriate status code. The handler marks all buffers in the + * irq queue as being erroneous (UVC_BUF_STATE_ERROR) and wakes them up so + * that any process waiting on a buffer gets woken up. + * + * Waking up up the first buffer on the irq list is not enough, as the + * process waiting on the buffer might restart the dequeue operation + * immediately. + * + */ + +void uvc_queue_init(struct uvc_video_queue *queue) +{ + mutex_init(&queue->mutex); + spin_lock_init(&queue->irqlock); + INIT_LIST_HEAD(&queue->mainqueue); + INIT_LIST_HEAD(&queue->irqqueue); +} + +/* + * Allocate the video buffers. + * + * Pages are reserved to make sure they will not be swaped, as they will be + * filled in URB completion handler. + * + * Buffers will be individually mapped, so they must all be page aligned. + */ +int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers, + unsigned int buflength) +{ + unsigned int bufsize = PAGE_ALIGN(buflength); + unsigned int i; + void *mem = NULL; + int ret; + + if (nbuffers > UVC_MAX_VIDEO_BUFFERS) + nbuffers = UVC_MAX_VIDEO_BUFFERS; + + mutex_lock(&queue->mutex); + + if ((ret = uvc_free_buffers(queue)) < 0) + goto done; + + /* Bail out if no buffers should be allocated. */ + if (nbuffers == 0) + goto done; + + /* Decrement the number of buffers until allocation succeeds. */ + for (; nbuffers > 0; --nbuffers) { + mem = vmalloc_32(nbuffers * bufsize); + if (mem != NULL) + break; + } + + if (mem == NULL) { + ret = -ENOMEM; + goto done; + } + + for (i = 0; i < nbuffers; ++i) { + memset(&queue->buffer[i], 0, sizeof queue->buffer[i]); + queue->buffer[i].buf.index = i; + queue->buffer[i].buf.m.offset = i * bufsize; + queue->buffer[i].buf.length = buflength; + queue->buffer[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + queue->buffer[i].buf.sequence = 0; + queue->buffer[i].buf.field = V4L2_FIELD_NONE; + queue->buffer[i].buf.memory = V4L2_MEMORY_MMAP; + queue->buffer[i].buf.flags = 0; + init_waitqueue_head(&queue->buffer[i].wait); + } + + queue->mem = mem; + queue->count = nbuffers; + queue->buf_size = bufsize; + ret = nbuffers; + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* + * Free the video buffers. + * + * This function must be called with the queue lock held. + */ +int uvc_free_buffers(struct uvc_video_queue *queue) +{ + unsigned int i; + + for (i = 0; i < queue->count; ++i) { + if (queue->buffer[i].vma_use_count != 0) + return -EBUSY; + } + + if (queue->count) { + vfree(queue->mem); + queue->count = 0; + } + + return 0; +} + +static void __uvc_query_buffer(struct uvc_buffer *buf, + struct v4l2_buffer *v4l2_buf) +{ + memcpy(v4l2_buf, &buf->buf, sizeof *v4l2_buf); + + if (buf->vma_use_count) + v4l2_buf->flags |= V4L2_BUF_FLAG_MAPPED; + + switch (buf->state) { + case UVC_BUF_STATE_ERROR: + case UVC_BUF_STATE_DONE: + v4l2_buf->flags |= V4L2_BUF_FLAG_DONE; + break; + case UVC_BUF_STATE_QUEUED: + case UVC_BUF_STATE_ACTIVE: + v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; + break; + case UVC_BUF_STATE_IDLE: + default: + break; + } +} + +int uvc_query_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf) +{ + int ret = 0; + + mutex_lock(&queue->mutex); + if (v4l2_buf->index >= queue->count) { + ret = -EINVAL; + goto done; + } + + __uvc_query_buffer(&queue->buffer[v4l2_buf->index], v4l2_buf); + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* + * Queue a video buffer. Attempting to queue a buffer that has already been + * queued will return -EINVAL. + */ +int uvc_queue_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf) +{ + struct uvc_buffer *buf; + unsigned long flags; + int ret = 0; + + uvc_trace(UVC_TRACE_CAPTURE, "Queuing buffer %u.\n", v4l2_buf->index); + + if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + v4l2_buf->memory != V4L2_MEMORY_MMAP) { + uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer type (%u) " + "and/or memory (%u).\n", v4l2_buf->type, + v4l2_buf->memory); + return -EINVAL; + } + + mutex_lock(&queue->mutex); + if (v4l2_buf->index >= queue->count) { + uvc_trace(UVC_TRACE_CAPTURE, "[E] Out of range index.\n"); + ret = -EINVAL; + goto done; + } + + buf = &queue->buffer[v4l2_buf->index]; + if (buf->state != UVC_BUF_STATE_IDLE) { + uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer state " + "(%u).\n", buf->state); + ret = -EINVAL; + goto done; + } + + spin_lock_irqsave(&queue->irqlock, flags); + if (queue->flags & UVC_QUEUE_DISCONNECTED) { + spin_unlock_irqrestore(&queue->irqlock, flags); + ret = -ENODEV; + goto done; + } + buf->state = UVC_BUF_STATE_QUEUED; + buf->buf.bytesused = 0; + list_add_tail(&buf->stream, &queue->mainqueue); + list_add_tail(&buf->queue, &queue->irqqueue); + spin_unlock_irqrestore(&queue->irqlock, flags); + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +static int uvc_queue_waiton(struct uvc_buffer *buf, int nonblocking) +{ + if (nonblocking) { + return (buf->state != UVC_BUF_STATE_QUEUED && + buf->state != UVC_BUF_STATE_ACTIVE) + ? 0 : -EAGAIN; + } + + return wait_event_interruptible(buf->wait, + buf->state != UVC_BUF_STATE_QUEUED && + buf->state != UVC_BUF_STATE_ACTIVE); +} + +/* + * Dequeue a video buffer. If nonblocking is false, block until a buffer is + * available. + */ +int uvc_dequeue_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf, int nonblocking) +{ + struct uvc_buffer *buf; + int ret = 0; + + if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + v4l2_buf->memory != V4L2_MEMORY_MMAP) { + uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer type (%u) " + "and/or memory (%u).\n", v4l2_buf->type, + v4l2_buf->memory); + return -EINVAL; + } + + mutex_lock(&queue->mutex); + if (list_empty(&queue->mainqueue)) { + uvc_trace(UVC_TRACE_CAPTURE, "[E] Empty buffer queue.\n"); + ret = -EINVAL; + goto done; + } + + buf = list_first_entry(&queue->mainqueue, struct uvc_buffer, stream); + if ((ret = uvc_queue_waiton(buf, nonblocking)) < 0) + goto done; + + uvc_trace(UVC_TRACE_CAPTURE, "Dequeuing buffer %u (%u, %u bytes).\n", + buf->buf.index, buf->state, buf->buf.bytesused); + + switch (buf->state) { + case UVC_BUF_STATE_ERROR: + uvc_trace(UVC_TRACE_CAPTURE, "[W] Corrupted data " + "(transmission error).\n"); + ret = -EIO; + case UVC_BUF_STATE_DONE: + buf->state = UVC_BUF_STATE_IDLE; + break; + + case UVC_BUF_STATE_IDLE: + case UVC_BUF_STATE_QUEUED: + case UVC_BUF_STATE_ACTIVE: + default: + uvc_trace(UVC_TRACE_CAPTURE, "[E] Invalid buffer state %u " + "(driver bug?).\n", buf->state); + ret = -EINVAL; + goto done; + } + + list_del(&buf->stream); + __uvc_query_buffer(buf, v4l2_buf); + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* + * Poll the video queue. + * + * This function implements video queue polling and is intended to be used by + * the device poll handler. + */ +unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, + poll_table *wait) +{ + struct uvc_buffer *buf; + unsigned int mask = 0; + + mutex_lock(&queue->mutex); + if (list_empty(&queue->mainqueue)) { + mask |= POLLERR; + goto done; + } + buf = list_first_entry(&queue->mainqueue, struct uvc_buffer, stream); + + poll_wait(file, &buf->wait, wait); + if (buf->state == UVC_BUF_STATE_DONE || + buf->state == UVC_BUF_STATE_ERROR) + mask |= POLLIN | POLLRDNORM; + +done: + mutex_unlock(&queue->mutex); + return mask; +} + +/* + * Enable or disable the video buffers queue. + * + * The queue must be enabled before starting video acquisition and must be + * disabled after stopping it. This ensures that the video buffers queue + * state can be properly initialized before buffers are accessed from the + * interrupt handler. + * + * Enabling the video queue initializes parameters (such as sequence number, + * sync pattern, ...). If the queue is already enabled, return -EBUSY. + * + * Disabling the video queue cancels the queue and removes all buffers from + * the main queue. + * + * This function can't be called from interrupt context. Use + * uvc_queue_cancel() instead. + */ +int uvc_queue_enable(struct uvc_video_queue *queue, int enable) +{ + unsigned int i; + int ret = 0; + + mutex_lock(&queue->mutex); + if (enable) { + if (uvc_queue_streaming(queue)) { + ret = -EBUSY; + goto done; + } + queue->sequence = 0; + queue->flags |= UVC_QUEUE_STREAMING; + } else { + uvc_queue_cancel(queue, 0); + INIT_LIST_HEAD(&queue->mainqueue); + + for (i = 0; i < queue->count; ++i) + queue->buffer[i].state = UVC_BUF_STATE_IDLE; + + queue->flags &= ~UVC_QUEUE_STREAMING; + } + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* + * Cancel the video buffers queue. + * + * Cancelling the queue marks all buffers on the irq queue as erroneous, + * wakes them up and remove them from the queue. + * + * If the disconnect parameter is set, further calls to uvc_queue_buffer will + * fail with -ENODEV. + * + * This function acquires the irq spinlock and can be called from interrupt + * context. + */ +void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect) +{ + struct uvc_buffer *buf; + unsigned long flags; + + spin_lock_irqsave(&queue->irqlock, flags); + while (!list_empty(&queue->irqqueue)) { + buf = list_first_entry(&queue->irqqueue, struct uvc_buffer, + queue); + list_del(&buf->queue); + buf->state = UVC_BUF_STATE_ERROR; + wake_up(&buf->wait); + } + /* This must be protected by the irqlock spinlock to avoid race + * conditions between uvc_queue_buffer and the disconnection event that + * could result in an interruptible wait in uvc_dequeue_buffer. Do not + * blindly replace this logic by checking for the UVC_DEV_DISCONNECTED + * state outside the queue code. + */ + if (disconnect) + queue->flags |= UVC_QUEUE_DISCONNECTED; + spin_unlock_irqrestore(&queue->irqlock, flags); +} + +struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, + struct uvc_buffer *buf) +{ + struct uvc_buffer *nextbuf; + unsigned long flags; + + if ((queue->flags & UVC_QUEUE_DROP_INCOMPLETE) && + buf->buf.length != buf->buf.bytesused) { + buf->state = UVC_BUF_STATE_QUEUED; + buf->buf.bytesused = 0; + return buf; + } + + spin_lock_irqsave(&queue->irqlock, flags); + list_del(&buf->queue); + if (!list_empty(&queue->irqqueue)) + nextbuf = list_first_entry(&queue->irqqueue, struct uvc_buffer, + queue); + else + nextbuf = NULL; + spin_unlock_irqrestore(&queue->irqlock, flags); + + buf->buf.sequence = queue->sequence++; + do_gettimeofday(&buf->buf.timestamp); + + wake_up(&buf->wait); + return nextbuf; +} diff --git a/drivers/media/video/uvc/uvc_status.c b/drivers/media/video/uvc/uvc_status.c new file mode 100644 index 000000000000..be9084e5eace --- /dev/null +++ b/drivers/media/video/uvc/uvc_status.c @@ -0,0 +1,207 @@ +/* + * uvc_status.c -- USB Video Class driver - Status endpoint + * + * Copyright (C) 2007-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/input.h> +#include <linux/usb.h> +#include <linux/usb/input.h> + +#include "uvcvideo.h" + +/* -------------------------------------------------------------------------- + * Input device + */ +static int uvc_input_init(struct uvc_device *dev) +{ + struct usb_device *udev = dev->udev; + struct input_dev *input; + char *phys = NULL; + int ret; + + input = input_allocate_device(); + if (input == NULL) + return -ENOMEM; + + phys = kmalloc(6 + strlen(udev->bus->bus_name) + strlen(udev->devpath), + GFP_KERNEL); + if (phys == NULL) { + ret = -ENOMEM; + goto error; + } + sprintf(phys, "usb-%s-%s", udev->bus->bus_name, udev->devpath); + + input->name = dev->name; + input->phys = phys; + usb_to_input_id(udev, &input->id); + input->dev.parent = &dev->intf->dev; + + set_bit(EV_KEY, input->evbit); + set_bit(BTN_0, input->keybit); + + if ((ret = input_register_device(input)) < 0) + goto error; + + dev->input = input; + return 0; + +error: + input_free_device(input); + kfree(phys); + return ret; +} + +static void uvc_input_cleanup(struct uvc_device *dev) +{ + if (dev->input) + input_unregister_device(dev->input); +} + +/* -------------------------------------------------------------------------- + * Status interrupt endpoint + */ +static void uvc_event_streaming(struct uvc_device *dev, __u8 *data, int len) +{ + if (len < 3) { + uvc_trace(UVC_TRACE_STATUS, "Invalid streaming status event " + "received.\n"); + return; + } + + if (data[2] == 0) { + if (len < 4) + return; + uvc_trace(UVC_TRACE_STATUS, "Button (intf %u) %s len %d\n", + data[1], data[3] ? "pressed" : "released", len); + if (dev->input) + input_report_key(dev->input, BTN_0, data[3]); + } else { + uvc_trace(UVC_TRACE_STATUS, "Stream %u error event %02x %02x " + "len %d.\n", data[1], data[2], data[3], len); + } +} + +static void uvc_event_control(struct uvc_device *dev, __u8 *data, int len) +{ + char *attrs[3] = { "value", "info", "failure" }; + + if (len < 6 || data[2] != 0 || data[4] > 2) { + uvc_trace(UVC_TRACE_STATUS, "Invalid control status event " + "received.\n"); + return; + } + + uvc_trace(UVC_TRACE_STATUS, "Control %u/%u %s change len %d.\n", + data[1], data[3], attrs[data[4]], len); +} + +static void uvc_status_complete(struct urb *urb) +{ + struct uvc_device *dev = urb->context; + int len, ret; + + switch (urb->status) { + case 0: + break; + + case -ENOENT: /* usb_kill_urb() called. */ + case -ECONNRESET: /* usb_unlink_urb() called. */ + case -ESHUTDOWN: /* The endpoint is being disabled. */ + case -EPROTO: /* Device is disconnected (reported by some + * host controller). */ + return; + + default: + uvc_printk(KERN_WARNING, "Non-zero status (%d) in status " + "completion handler.\n", urb->status); + return; + } + + len = urb->actual_length; + if (len > 0) { + switch (dev->status[0] & 0x0f) { + case UVC_STATUS_TYPE_CONTROL: + uvc_event_control(dev, dev->status, len); + break; + + case UVC_STATUS_TYPE_STREAMING: + uvc_event_streaming(dev, dev->status, len); + break; + + default: + uvc_printk(KERN_INFO, "unknown event type %u.\n", + dev->status[0]); + break; + } + } + + /* Resubmit the URB. */ + urb->interval = dev->int_ep->desc.bInterval; + if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { + uvc_printk(KERN_ERR, "Failed to resubmit status URB (%d).\n", + ret); + } +} + +int uvc_status_init(struct uvc_device *dev) +{ + struct usb_host_endpoint *ep = dev->int_ep; + unsigned int pipe; + int interval; + + if (ep == NULL) + return 0; + + uvc_input_init(dev); + + dev->int_urb = usb_alloc_urb(0, GFP_KERNEL); + if (dev->int_urb == NULL) + return -ENOMEM; + + pipe = usb_rcvintpipe(dev->udev, ep->desc.bEndpointAddress); + + /* For high-speed interrupt endpoints, the bInterval value is used as + * an exponent of two. Some developers forgot about it. + */ + interval = ep->desc.bInterval; + if (interval > 16 && dev->udev->speed == USB_SPEED_HIGH && + (dev->quirks & UVC_QUIRK_STATUS_INTERVAL)) + interval = fls(interval) - 1; + + usb_fill_int_urb(dev->int_urb, dev->udev, pipe, + dev->status, sizeof dev->status, uvc_status_complete, + dev, interval); + + return usb_submit_urb(dev->int_urb, GFP_KERNEL); +} + +void uvc_status_cleanup(struct uvc_device *dev) +{ + usb_kill_urb(dev->int_urb); + usb_free_urb(dev->int_urb); + uvc_input_cleanup(dev); +} + +int uvc_status_suspend(struct uvc_device *dev) +{ + usb_kill_urb(dev->int_urb); + return 0; +} + +int uvc_status_resume(struct uvc_device *dev) +{ + if (dev->int_urb == NULL) + return 0; + + return usb_submit_urb(dev->int_urb, GFP_KERNEL); +} diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c new file mode 100644 index 000000000000..2e0a66575bb4 --- /dev/null +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -0,0 +1,1105 @@ +/* + * uvc_v4l2.c -- USB Video Class driver - V4L2 API + * + * Copyright (C) 2005-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <linux/vmalloc.h> +#include <linux/mm.h> +#include <linux/wait.h> +#include <asm/atomic.h> + +#include <media/v4l2-common.h> + +#include "uvcvideo.h" + +/* ------------------------------------------------------------------------ + * V4L2 interface + */ + +/* + * Mapping V4L2 controls to UVC controls can be straighforward if done well. + * Most of the UVC controls exist in V4L2, and can be mapped directly. Some + * must be grouped (for instance the Red Balance, Blue Balance and Do White + * Balance V4L2 controls use the White Balance Component UVC control) or + * otherwise translated. The approach we take here is to use a translation + * table for the controls which can be mapped directly, and handle the others + * manually. + */ +static int uvc_v4l2_query_menu(struct uvc_video_device *video, + struct v4l2_querymenu *query_menu) +{ + struct uvc_menu_info *menu_info; + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + + ctrl = uvc_find_control(video, query_menu->id, &mapping); + if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) + return -EINVAL; + + if (query_menu->index >= mapping->menu_count) + return -EINVAL; + + menu_info = &mapping->menu_info[query_menu->index]; + strncpy(query_menu->name, menu_info->name, 32); + return 0; +} + +/* + * Find the frame interval closest to the requested frame interval for the + * given frame format and size. This should be done by the device as part of + * the Video Probe and Commit negotiation, but some hardware don't implement + * that feature. + */ +static __u32 uvc_try_frame_interval(struct uvc_frame *frame, __u32 interval) +{ + unsigned int i; + + if (frame->bFrameIntervalType) { + __u32 best = -1, dist; + + for (i = 0; i < frame->bFrameIntervalType; ++i) { + dist = interval > frame->dwFrameInterval[i] + ? interval - frame->dwFrameInterval[i] + : frame->dwFrameInterval[i] - interval; + + if (dist > best) + break; + + best = dist; + } + + interval = frame->dwFrameInterval[i-1]; + } else { + const __u32 min = frame->dwFrameInterval[0]; + const __u32 max = frame->dwFrameInterval[1]; + const __u32 step = frame->dwFrameInterval[2]; + + interval = min + (interval - min + step/2) / step * step; + if (interval > max) + interval = max; + } + + return interval; +} + +static int uvc_v4l2_try_format(struct uvc_video_device *video, + struct v4l2_format *fmt, struct uvc_streaming_control *probe, + struct uvc_format **uvc_format, struct uvc_frame **uvc_frame) +{ + struct uvc_format *format = NULL; + struct uvc_frame *frame = NULL; + __u16 rw, rh; + unsigned int d, maxd; + unsigned int i; + __u32 interval; + int ret = 0; + __u8 *fcc; + + if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + fcc = (__u8 *)&fmt->fmt.pix.pixelformat; + uvc_trace(UVC_TRACE_FORMAT, "Trying format 0x%08x (%c%c%c%c): %ux%u.\n", + fmt->fmt.pix.pixelformat, + fcc[0], fcc[1], fcc[2], fcc[3], + fmt->fmt.pix.width, fmt->fmt.pix.height); + + /* Check if the hardware supports the requested format. */ + for (i = 0; i < video->streaming->nformats; ++i) { + format = &video->streaming->format[i]; + if (format->fcc == fmt->fmt.pix.pixelformat) + break; + } + + if (format == NULL || format->fcc != fmt->fmt.pix.pixelformat) { + uvc_trace(UVC_TRACE_FORMAT, "Unsupported format 0x%08x.\n", + fmt->fmt.pix.pixelformat); + return -EINVAL; + } + + /* Find the closest image size. The distance between image sizes is + * the size in pixels of the non-overlapping regions between the + * requested size and the frame-specified size. + */ + rw = fmt->fmt.pix.width; + rh = fmt->fmt.pix.height; + maxd = (unsigned int)-1; + + for (i = 0; i < format->nframes; ++i) { + __u16 w = format->frame[i].wWidth; + __u16 h = format->frame[i].wHeight; + + d = min(w, rw) * min(h, rh); + d = w*h + rw*rh - 2*d; + if (d < maxd) { + maxd = d; + frame = &format->frame[i]; + } + + if (maxd == 0) + break; + } + + if (frame == NULL) { + uvc_trace(UVC_TRACE_FORMAT, "Unsupported size %ux%u.\n", + fmt->fmt.pix.width, fmt->fmt.pix.height); + return -EINVAL; + } + + /* Use the default frame interval. */ + interval = frame->dwDefaultFrameInterval; + uvc_trace(UVC_TRACE_FORMAT, "Using default frame interval %u.%u us " + "(%u.%u fps).\n", interval/10, interval%10, 10000000/interval, + (100000000/interval)%10); + + /* Set the format index, frame index and frame interval. */ + memset(probe, 0, sizeof *probe); + probe->bmHint = 1; /* dwFrameInterval */ + probe->bFormatIndex = format->index; + probe->bFrameIndex = frame->bFrameIndex; + probe->dwFrameInterval = uvc_try_frame_interval(frame, interval); + /* Some webcams stall the probe control set request when the + * dwMaxVideoFrameSize field is set to zero. The UVC specification + * clearly states that the field is read-only from the host, so this + * is a webcam bug. Set dwMaxVideoFrameSize to the value reported by + * the webcam to work around the problem. + * + * The workaround could probably be enabled for all webcams, so the + * quirk can be removed if needed. It's currently useful to detect + * webcam bugs and fix them before they hit the market (providing + * developers test their webcams with the Linux driver as well as with + * the Windows driver). + */ + if (video->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) + probe->dwMaxVideoFrameSize = + video->streaming->ctrl.dwMaxVideoFrameSize; + + /* Probe the device */ + if ((ret = uvc_probe_video(video, probe)) < 0) + goto done; + + fmt->fmt.pix.width = frame->wWidth; + fmt->fmt.pix.height = frame->wHeight; + fmt->fmt.pix.field = V4L2_FIELD_NONE; + fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; + fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; + fmt->fmt.pix.colorspace = format->colorspace; + fmt->fmt.pix.priv = 0; + + if (uvc_format != NULL) + *uvc_format = format; + if (uvc_frame != NULL) + *uvc_frame = frame; + +done: + return ret; +} + +static int uvc_v4l2_get_format(struct uvc_video_device *video, + struct v4l2_format *fmt) +{ + struct uvc_format *format = video->streaming->cur_format; + struct uvc_frame *frame = video->streaming->cur_frame; + + if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (format == NULL || frame == NULL) + return -EINVAL; + + fmt->fmt.pix.pixelformat = format->fcc; + fmt->fmt.pix.width = frame->wWidth; + fmt->fmt.pix.height = frame->wHeight; + fmt->fmt.pix.field = V4L2_FIELD_NONE; + fmt->fmt.pix.bytesperline = format->bpp * frame->wWidth / 8; + fmt->fmt.pix.sizeimage = video->streaming->ctrl.dwMaxVideoFrameSize; + fmt->fmt.pix.colorspace = format->colorspace; + fmt->fmt.pix.priv = 0; + + return 0; +} + +static int uvc_v4l2_set_format(struct uvc_video_device *video, + struct v4l2_format *fmt) +{ + struct uvc_streaming_control probe; + struct uvc_format *format; + struct uvc_frame *frame; + int ret; + + if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (uvc_queue_streaming(&video->queue)) + return -EBUSY; + + ret = uvc_v4l2_try_format(video, fmt, &probe, &format, &frame); + if (ret < 0) + return ret; + + if ((ret = uvc_set_video_ctrl(video, &probe, 0)) < 0) + return ret; + + memcpy(&video->streaming->ctrl, &probe, sizeof probe); + video->streaming->cur_format = format; + video->streaming->cur_frame = frame; + + return 0; +} + +static int uvc_v4l2_get_streamparm(struct uvc_video_device *video, + struct v4l2_streamparm *parm) +{ + uint32_t numerator, denominator; + + if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + numerator = video->streaming->ctrl.dwFrameInterval; + denominator = 10000000; + uvc_simplify_fraction(&numerator, &denominator, 8, 333); + + memset(parm, 0, sizeof *parm); + parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + parm->parm.capture.capturemode = 0; + parm->parm.capture.timeperframe.numerator = numerator; + parm->parm.capture.timeperframe.denominator = denominator; + parm->parm.capture.extendedmode = 0; + parm->parm.capture.readbuffers = 0; + + return 0; +} + +static int uvc_v4l2_set_streamparm(struct uvc_video_device *video, + struct v4l2_streamparm *parm) +{ + struct uvc_frame *frame = video->streaming->cur_frame; + struct uvc_streaming_control probe; + uint32_t interval; + int ret; + + if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (uvc_queue_streaming(&video->queue)) + return -EBUSY; + + memcpy(&probe, &video->streaming->ctrl, sizeof probe); + interval = uvc_fraction_to_interval( + parm->parm.capture.timeperframe.numerator, + parm->parm.capture.timeperframe.denominator); + + uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", + parm->parm.capture.timeperframe.numerator, + parm->parm.capture.timeperframe.denominator, + interval); + probe.dwFrameInterval = uvc_try_frame_interval(frame, interval); + + /* Probe the device with the new settings. */ + if ((ret = uvc_probe_video(video, &probe)) < 0) + return ret; + + /* Commit the new settings. */ + if ((ret = uvc_set_video_ctrl(video, &probe, 0)) < 0) + return ret; + + memcpy(&video->streaming->ctrl, &probe, sizeof probe); + + /* Return the actual frame period. */ + parm->parm.capture.timeperframe.numerator = probe.dwFrameInterval; + parm->parm.capture.timeperframe.denominator = 10000000; + uvc_simplify_fraction(&parm->parm.capture.timeperframe.numerator, + &parm->parm.capture.timeperframe.denominator, + 8, 333); + + return 0; +} + +/* ------------------------------------------------------------------------ + * Privilege management + */ + +/* + * Privilege management is the multiple-open implementation basis. The current + * implementation is completely transparent for the end-user and doesn't + * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioctls. + * Those ioctls enable finer control on the device (by making possible for a + * user to request exclusive access to a device), but are not mature yet. + * Switching to the V4L2 priority mechanism might be considered in the future + * if this situation changes. + * + * Each open instance of a UVC device can either be in a privileged or + * unprivileged state. Only a single instance can be in a privileged state at + * a given time. Trying to perform an operation which requires privileges will + * automatically acquire the required privileges if possible, or return -EBUSY + * otherwise. Privileges are dismissed when closing the instance. + * + * Operations which require privileges are: + * + * - VIDIOC_S_INPUT + * - VIDIOC_S_PARM + * - VIDIOC_S_FMT + * - VIDIOC_TRY_FMT + * - VIDIOC_REQBUFS + */ +static int uvc_acquire_privileges(struct uvc_fh *handle) +{ + int ret = 0; + + /* Always succeed if the handle is already privileged. */ + if (handle->state == UVC_HANDLE_ACTIVE) + return 0; + + /* Check if the device already has a privileged handle. */ + mutex_lock(&uvc_driver.open_mutex); + if (atomic_inc_return(&handle->device->active) != 1) { + atomic_dec(&handle->device->active); + ret = -EBUSY; + goto done; + } + + handle->state = UVC_HANDLE_ACTIVE; + +done: + mutex_unlock(&uvc_driver.open_mutex); + return ret; +} + +static void uvc_dismiss_privileges(struct uvc_fh *handle) +{ + if (handle->state == UVC_HANDLE_ACTIVE) + atomic_dec(&handle->device->active); + + handle->state = UVC_HANDLE_PASSIVE; +} + +static int uvc_has_privileges(struct uvc_fh *handle) +{ + return handle->state == UVC_HANDLE_ACTIVE; +} + +/* ------------------------------------------------------------------------ + * V4L2 file operations + */ + +static int uvc_v4l2_open(struct inode *inode, struct file *file) +{ + struct video_device *vdev; + struct uvc_video_device *video; + struct uvc_fh *handle; + int ret = 0; + + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_open\n"); + mutex_lock(&uvc_driver.open_mutex); + vdev = video_devdata(file); + video = video_get_drvdata(vdev); + + if (video->dev->state & UVC_DEV_DISCONNECTED) { + ret = -ENODEV; + goto done; + } + + ret = usb_autopm_get_interface(video->dev->intf); + if (ret < 0) + goto done; + + /* Create the device handle. */ + handle = kzalloc(sizeof *handle, GFP_KERNEL); + if (handle == NULL) { + usb_autopm_put_interface(video->dev->intf); + ret = -ENOMEM; + goto done; + } + + handle->device = video; + handle->state = UVC_HANDLE_PASSIVE; + file->private_data = handle; + + kref_get(&video->dev->kref); + +done: + mutex_unlock(&uvc_driver.open_mutex); + return ret; +} + +static int uvc_v4l2_release(struct inode *inode, struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_video_device *video = video_get_drvdata(vdev); + struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_release\n"); + + /* Only free resources if this is a privileged handle. */ + if (uvc_has_privileges(handle)) { + uvc_video_enable(video, 0); + + mutex_lock(&video->queue.mutex); + if (uvc_free_buffers(&video->queue) < 0) + uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to " + "free buffers.\n"); + mutex_unlock(&video->queue.mutex); + } + + /* Release the file handle. */ + uvc_dismiss_privileges(handle); + kfree(handle); + file->private_data = NULL; + + usb_autopm_put_interface(video->dev->intf); + kref_put(&video->dev->kref, uvc_delete); + return 0; +} + +static int uvc_v4l2_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *arg) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_video_device *video = video_get_drvdata(vdev); + struct uvc_fh *handle = (struct uvc_fh *)file->private_data; + int ret = 0; + + if (uvc_trace_param & UVC_TRACE_IOCTL) + v4l_printk_ioctl(cmd); + + switch (cmd) { + /* Query capabilities */ + case VIDIOC_QUERYCAP: + { + struct v4l2_capability *cap = arg; + + memset(cap, 0, sizeof *cap); + strncpy(cap->driver, "uvcvideo", sizeof cap->driver); + strncpy(cap->card, vdev->name, 32); + strncpy(cap->bus_info, video->dev->udev->bus->bus_name, + sizeof cap->bus_info); + cap->version = DRIVER_VERSION_NUMBER; + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE + | V4L2_CAP_STREAMING; + break; + } + + /* Get, Set & Query control */ + case VIDIOC_QUERYCTRL: + return uvc_query_v4l2_ctrl(video, arg); + + case VIDIOC_G_CTRL: + { + struct v4l2_control *ctrl = arg; + struct v4l2_ext_control xctrl; + + memset(&xctrl, 0, sizeof xctrl); + xctrl.id = ctrl->id; + + uvc_ctrl_begin(video); + ret = uvc_ctrl_get(video, &xctrl); + uvc_ctrl_rollback(video); + if (ret >= 0) + ctrl->value = xctrl.value; + break; + } + + case VIDIOC_S_CTRL: + { + struct v4l2_control *ctrl = arg; + struct v4l2_ext_control xctrl; + + memset(&xctrl, 0, sizeof xctrl); + xctrl.id = ctrl->id; + xctrl.value = ctrl->value; + + uvc_ctrl_begin(video); + ret = uvc_ctrl_set(video, &xctrl); + if (ret < 0) { + uvc_ctrl_rollback(video); + return ret; + } + ret = uvc_ctrl_commit(video); + break; + } + + case VIDIOC_QUERYMENU: + return uvc_v4l2_query_menu(video, arg); + + case VIDIOC_G_EXT_CTRLS: + { + struct v4l2_ext_controls *ctrls = arg; + struct v4l2_ext_control *ctrl = ctrls->controls; + unsigned int i; + + uvc_ctrl_begin(video); + for (i = 0; i < ctrls->count; ++ctrl, ++i) { + ret = uvc_ctrl_get(video, ctrl); + if (ret < 0) { + uvc_ctrl_rollback(video); + ctrls->error_idx = i; + return ret; + } + } + ctrls->error_idx = 0; + ret = uvc_ctrl_rollback(video); + break; + } + + case VIDIOC_S_EXT_CTRLS: + case VIDIOC_TRY_EXT_CTRLS: + { + struct v4l2_ext_controls *ctrls = arg; + struct v4l2_ext_control *ctrl = ctrls->controls; + unsigned int i; + + ret = uvc_ctrl_begin(video); + if (ret < 0) + return ret; + + for (i = 0; i < ctrls->count; ++ctrl, ++i) { + ret = uvc_ctrl_set(video, ctrl); + if (ret < 0) { + uvc_ctrl_rollback(video); + ctrls->error_idx = i; + return ret; + } + } + + ctrls->error_idx = 0; + + if (cmd == VIDIOC_S_EXT_CTRLS) + ret = uvc_ctrl_commit(video); + else + ret = uvc_ctrl_rollback(video); + break; + } + + /* Get, Set & Enum input */ + case VIDIOC_ENUMINPUT: + { + const struct uvc_entity *selector = video->selector; + struct v4l2_input *input = arg; + struct uvc_entity *iterm = NULL; + u32 index = input->index; + int pin = 0; + + if (selector == NULL || + (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + if (index != 0) + return -EINVAL; + iterm = list_first_entry(&video->iterms, + struct uvc_entity, chain); + pin = iterm->id; + } else if (pin < selector->selector.bNrInPins) { + pin = selector->selector.baSourceID[index]; + list_for_each_entry(iterm, video->iterms.next, chain) { + if (iterm->id == pin) + break; + } + } + + if (iterm == NULL || iterm->id != pin) + return -EINVAL; + + memset(input, 0, sizeof *input); + input->index = index; + strncpy(input->name, iterm->name, sizeof input->name); + if (UVC_ENTITY_TYPE(iterm) == ITT_CAMERA) + input->type = V4L2_INPUT_TYPE_CAMERA; + break; + } + + case VIDIOC_G_INPUT: + { + u8 input; + + if (video->selector == NULL || + (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + *(int *)arg = 0; + break; + } + + ret = uvc_query_ctrl(video->dev, GET_CUR, video->selector->id, + video->dev->intfnum, SU_INPUT_SELECT_CONTROL, + &input, 1); + if (ret < 0) + return ret; + + *(int *)arg = input - 1; + break; + } + + case VIDIOC_S_INPUT: + { + u8 input = *(u32 *)arg + 1; + + if ((ret = uvc_acquire_privileges(handle)) < 0) + return ret; + + if (video->selector == NULL || + (video->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { + if (input != 1) + return -EINVAL; + break; + } + + if (input > video->selector->selector.bNrInPins) + return -EINVAL; + + return uvc_query_ctrl(video->dev, SET_CUR, video->selector->id, + video->dev->intfnum, SU_INPUT_SELECT_CONTROL, + &input, 1); + } + + /* Try, Get, Set & Enum format */ + case VIDIOC_ENUM_FMT: + { + struct v4l2_fmtdesc *fmt = arg; + struct uvc_format *format; + + if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + fmt->index >= video->streaming->nformats) + return -EINVAL; + + format = &video->streaming->format[fmt->index]; + fmt->flags = 0; + if (format->flags & UVC_FMT_FLAG_COMPRESSED) + fmt->flags |= V4L2_FMT_FLAG_COMPRESSED; + strncpy(fmt->description, format->name, + sizeof fmt->description); + fmt->description[sizeof fmt->description - 1] = 0; + fmt->pixelformat = format->fcc; + break; + } + + case VIDIOC_TRY_FMT: + { + struct uvc_streaming_control probe; + + if ((ret = uvc_acquire_privileges(handle)) < 0) + return ret; + + return uvc_v4l2_try_format(video, arg, &probe, NULL, NULL); + } + + case VIDIOC_S_FMT: + if ((ret = uvc_acquire_privileges(handle)) < 0) + return ret; + + return uvc_v4l2_set_format(video, arg); + + case VIDIOC_G_FMT: + return uvc_v4l2_get_format(video, arg); + + /* Frame size enumeration */ + case VIDIOC_ENUM_FRAMESIZES: + { + struct v4l2_frmsizeenum *fsize = arg; + struct uvc_format *format = NULL; + struct uvc_frame *frame; + int i; + + /* Look for the given pixel format */ + for (i = 0; i < video->streaming->nformats; i++) { + if (video->streaming->format[i].fcc == + fsize->pixel_format) { + format = &video->streaming->format[i]; + break; + } + } + if (format == NULL) + return -EINVAL; + + if (fsize->index >= format->nframes) + return -EINVAL; + + frame = &format->frame[fsize->index]; + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = frame->wWidth; + fsize->discrete.height = frame->wHeight; + break; + } + + /* Frame interval enumeration */ + case VIDIOC_ENUM_FRAMEINTERVALS: + { + struct v4l2_frmivalenum *fival = arg; + struct uvc_format *format = NULL; + struct uvc_frame *frame = NULL; + int i; + + /* Look for the given pixel format and frame size */ + for (i = 0; i < video->streaming->nformats; i++) { + if (video->streaming->format[i].fcc == + fival->pixel_format) { + format = &video->streaming->format[i]; + break; + } + } + if (format == NULL) + return -EINVAL; + + for (i = 0; i < format->nframes; i++) { + if (format->frame[i].wWidth == fival->width && + format->frame[i].wHeight == fival->height) { + frame = &format->frame[i]; + break; + } + } + if (frame == NULL) + return -EINVAL; + + if (frame->bFrameIntervalType) { + if (fival->index >= frame->bFrameIntervalType) + return -EINVAL; + + fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; + fival->discrete.numerator = + frame->dwFrameInterval[fival->index]; + fival->discrete.denominator = 10000000; + uvc_simplify_fraction(&fival->discrete.numerator, + &fival->discrete.denominator, 8, 333); + } else { + fival->type = V4L2_FRMIVAL_TYPE_STEPWISE; + fival->stepwise.min.numerator = + frame->dwFrameInterval[0]; + fival->stepwise.min.denominator = 10000000; + fival->stepwise.max.numerator = + frame->dwFrameInterval[1]; + fival->stepwise.max.denominator = 10000000; + fival->stepwise.step.numerator = + frame->dwFrameInterval[2]; + fival->stepwise.step.denominator = 10000000; + uvc_simplify_fraction(&fival->stepwise.min.numerator, + &fival->stepwise.min.denominator, 8, 333); + uvc_simplify_fraction(&fival->stepwise.max.numerator, + &fival->stepwise.max.denominator, 8, 333); + uvc_simplify_fraction(&fival->stepwise.step.numerator, + &fival->stepwise.step.denominator, 8, 333); + } + break; + } + + /* Get & Set streaming parameters */ + case VIDIOC_G_PARM: + return uvc_v4l2_get_streamparm(video, arg); + + case VIDIOC_S_PARM: + if ((ret = uvc_acquire_privileges(handle)) < 0) + return ret; + + return uvc_v4l2_set_streamparm(video, arg); + + /* Cropping and scaling */ + case VIDIOC_CROPCAP: + { + struct v4l2_cropcap *ccap = arg; + struct uvc_frame *frame = video->streaming->cur_frame; + + if (ccap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + ccap->bounds.left = 0; + ccap->bounds.top = 0; + ccap->bounds.width = frame->wWidth; + ccap->bounds.height = frame->wHeight; + + ccap->defrect = ccap->bounds; + + ccap->pixelaspect.numerator = 1; + ccap->pixelaspect.denominator = 1; + break; + } + + case VIDIOC_G_CROP: + case VIDIOC_S_CROP: + return -EINVAL; + + /* Buffers & streaming */ + case VIDIOC_REQBUFS: + { + struct v4l2_requestbuffers *rb = arg; + unsigned int bufsize = + video->streaming->ctrl.dwMaxVideoFrameSize; + + if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + rb->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + if ((ret = uvc_acquire_privileges(handle)) < 0) + return ret; + + ret = uvc_alloc_buffers(&video->queue, rb->count, bufsize); + if (ret < 0) + return ret; + + if (!(video->streaming->cur_format->flags & + UVC_FMT_FLAG_COMPRESSED)) + video->queue.flags |= UVC_QUEUE_DROP_INCOMPLETE; + + rb->count = ret; + ret = 0; + break; + } + + case VIDIOC_QUERYBUF: + { + struct v4l2_buffer *buf = arg; + + if (buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!uvc_has_privileges(handle)) + return -EBUSY; + + return uvc_query_buffer(&video->queue, buf); + } + + case VIDIOC_QBUF: + if (!uvc_has_privileges(handle)) + return -EBUSY; + + return uvc_queue_buffer(&video->queue, arg); + + case VIDIOC_DQBUF: + if (!uvc_has_privileges(handle)) + return -EBUSY; + + return uvc_dequeue_buffer(&video->queue, arg, + file->f_flags & O_NONBLOCK); + + case VIDIOC_STREAMON: + { + int *type = arg; + + if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!uvc_has_privileges(handle)) + return -EBUSY; + + if ((ret = uvc_video_enable(video, 1)) < 0) + return ret; + break; + } + + case VIDIOC_STREAMOFF: + { + int *type = arg; + + if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!uvc_has_privileges(handle)) + return -EBUSY; + + return uvc_video_enable(video, 0); + } + + /* Analog video standards make no sense for digital cameras. */ + case VIDIOC_ENUMSTD: + case VIDIOC_QUERYSTD: + case VIDIOC_G_STD: + case VIDIOC_S_STD: + + case VIDIOC_OVERLAY: + + case VIDIOC_ENUMAUDIO: + case VIDIOC_ENUMAUDOUT: + + case VIDIOC_ENUMOUTPUT: + uvc_trace(UVC_TRACE_IOCTL, "Unsupported ioctl 0x%08x\n", cmd); + return -EINVAL; + + /* Dynamic controls. */ + case UVCIOC_CTRL_ADD: + { + struct uvc_xu_control_info *xinfo = arg; + struct uvc_control_info *info; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + info = kmalloc(sizeof *info, GFP_KERNEL); + if (info == NULL) + return -ENOMEM; + + memcpy(info->entity, xinfo->entity, sizeof info->entity); + info->index = xinfo->index; + info->selector = xinfo->selector; + info->size = xinfo->size; + info->flags = xinfo->flags; + + info->flags |= UVC_CONTROL_GET_MIN | UVC_CONTROL_GET_MAX | + UVC_CONTROL_GET_RES | UVC_CONTROL_GET_DEF; + + ret = uvc_ctrl_add_info(info); + if (ret < 0) + kfree(info); + break; + } + + case UVCIOC_CTRL_MAP: + { + struct uvc_xu_control_mapping *xmap = arg; + struct uvc_control_mapping *map; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + map = kmalloc(sizeof *map, GFP_KERNEL); + if (map == NULL) + return -ENOMEM; + + map->id = xmap->id; + memcpy(map->name, xmap->name, sizeof map->name); + memcpy(map->entity, xmap->entity, sizeof map->entity); + map->selector = xmap->selector; + map->size = xmap->size; + map->offset = xmap->offset; + map->v4l2_type = xmap->v4l2_type; + map->data_type = xmap->data_type; + + ret = uvc_ctrl_add_mapping(map); + if (ret < 0) + kfree(map); + break; + } + + case UVCIOC_CTRL_GET: + return uvc_xu_ctrl_query(video, arg, 0); + + case UVCIOC_CTRL_SET: + return uvc_xu_ctrl_query(video, arg, 1); + + default: + if ((ret = v4l_compat_translate_ioctl(inode, file, cmd, arg, + uvc_v4l2_do_ioctl)) == -ENOIOCTLCMD) + uvc_trace(UVC_TRACE_IOCTL, "Unknown ioctl 0x%08x\n", + cmd); + return ret; + } + + return ret; +} + +static int uvc_v4l2_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_ioctl\n"); + return video_usercopy(inode, file, cmd, arg, uvc_v4l2_do_ioctl); +} + +static ssize_t uvc_v4l2_read(struct file *file, char __user *data, + size_t count, loff_t *ppos) +{ + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_read: not implemented.\n"); + return -ENODEV; +} + +/* + * VMA operations. + */ +static void uvc_vm_open(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count++; +} + +static void uvc_vm_close(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count--; +} + +static struct vm_operations_struct uvc_vm_ops = { + .open = uvc_vm_open, + .close = uvc_vm_close, +}; + +static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_video_device *video = video_get_drvdata(vdev); + struct uvc_buffer *buffer; + struct page *page; + unsigned long addr, start, size; + unsigned int i; + int ret = 0; + + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); + + start = vma->vm_start; + size = vma->vm_end - vma->vm_start; + + mutex_lock(&video->queue.mutex); + + for (i = 0; i < video->queue.count; ++i) { + buffer = &video->queue.buffer[i]; + if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) + break; + } + + if (i == video->queue.count || size != video->queue.buf_size) { + ret = -EINVAL; + goto done; + } + + /* + * VM_IO marks the area as being an mmaped region for I/O to a + * device. It also prevents the region from being core dumped. + */ + vma->vm_flags |= VM_IO; + + addr = (unsigned long)video->queue.mem + buffer->buf.m.offset; + while (size > 0) { + page = vmalloc_to_page((void *)addr); + if ((ret = vm_insert_page(vma, start, page)) < 0) + goto done; + + start += PAGE_SIZE; + addr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + vma->vm_ops = &uvc_vm_ops; + vma->vm_private_data = buffer; + uvc_vm_open(vma); + +done: + mutex_unlock(&video->queue.mutex); + return ret; +} + +static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) +{ + struct video_device *vdev = video_devdata(file); + struct uvc_video_device *video = video_get_drvdata(vdev); + + uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_poll\n"); + + return uvc_queue_poll(&video->queue, file, wait); +} + +struct file_operations uvc_fops = { + .owner = THIS_MODULE, + .open = uvc_v4l2_open, + .release = uvc_v4l2_release, + .ioctl = uvc_v4l2_ioctl, + .compat_ioctl = v4l_compat_ioctl32, + .llseek = no_llseek, + .read = uvc_v4l2_read, + .mmap = uvc_v4l2_mmap, + .poll = uvc_v4l2_poll, +}; diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c new file mode 100644 index 000000000000..6faf1fb21614 --- /dev/null +++ b/drivers/media/video/uvc/uvc_video.c @@ -0,0 +1,934 @@ +/* + * uvc_video.c -- USB Video Class driver - Video handling + * + * Copyright (C) 2005-2008 + * Laurent Pinchart (laurent.pinchart@skynet.be) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + */ + +#include <linux/kernel.h> +#include <linux/version.h> +#include <linux/list.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <linux/vmalloc.h> +#include <linux/wait.h> +#include <asm/atomic.h> +#include <asm/unaligned.h> + +#include <media/v4l2-common.h> + +#include "uvcvideo.h" + +/* ------------------------------------------------------------------------ + * UVC Controls + */ + +static int __uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, + __u8 intfnum, __u8 cs, void *data, __u16 size, + int timeout) +{ + __u8 type = USB_TYPE_CLASS | USB_RECIP_INTERFACE; + unsigned int pipe; + int ret; + + pipe = (query & 0x80) ? usb_rcvctrlpipe(dev->udev, 0) + : usb_sndctrlpipe(dev->udev, 0); + type |= (query & 0x80) ? USB_DIR_IN : USB_DIR_OUT; + + ret = usb_control_msg(dev->udev, pipe, query, type, cs << 8, + unit << 8 | intfnum, data, size, timeout); + + if (ret != size) { + uvc_printk(KERN_ERR, "Failed to query (%u) UVC control %u " + "(unit %u) : %d (exp. %u).\n", query, cs, unit, ret, + size); + return -EIO; + } + + return 0; +} + +int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, + __u8 intfnum, __u8 cs, void *data, __u16 size) +{ + return __uvc_query_ctrl(dev, query, unit, intfnum, cs, data, size, + UVC_CTRL_CONTROL_TIMEOUT); +} + +static void uvc_fixup_buffer_size(struct uvc_video_device *video, + struct uvc_streaming_control *ctrl) +{ + struct uvc_format *format; + struct uvc_frame *frame; + + if (ctrl->bFormatIndex <= 0 || + ctrl->bFormatIndex > video->streaming->nformats) + return; + + format = &video->streaming->format[ctrl->bFormatIndex - 1]; + + if (ctrl->bFrameIndex <= 0 || + ctrl->bFrameIndex > format->nframes) + return; + + frame = &format->frame[ctrl->bFrameIndex - 1]; + + if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) || + (ctrl->dwMaxVideoFrameSize == 0 && + video->dev->uvc_version < 0x0110)) + ctrl->dwMaxVideoFrameSize = + frame->dwMaxVideoFrameBufferSize; +} + +static int uvc_get_video_ctrl(struct uvc_video_device *video, + struct uvc_streaming_control *ctrl, int probe, __u8 query) +{ + __u8 data[34]; + __u8 size; + int ret; + + size = video->dev->uvc_version >= 0x0110 ? 34 : 26; + ret = __uvc_query_ctrl(video->dev, query, 0, video->streaming->intfnum, + probe ? VS_PROBE_CONTROL : VS_COMMIT_CONTROL, &data, size, + UVC_CTRL_STREAMING_TIMEOUT); + + if (ret < 0) + return ret; + + ctrl->bmHint = le16_to_cpup((__le16 *)&data[0]); + ctrl->bFormatIndex = data[2]; + ctrl->bFrameIndex = data[3]; + ctrl->dwFrameInterval = le32_to_cpup((__le32 *)&data[4]); + ctrl->wKeyFrameRate = le16_to_cpup((__le16 *)&data[8]); + ctrl->wPFrameRate = le16_to_cpup((__le16 *)&data[10]); + ctrl->wCompQuality = le16_to_cpup((__le16 *)&data[12]); + ctrl->wCompWindowSize = le16_to_cpup((__le16 *)&data[14]); + ctrl->wDelay = le16_to_cpup((__le16 *)&data[16]); + ctrl->dwMaxVideoFrameSize = + le32_to_cpu(get_unaligned((__le32 *)&data[18])); + ctrl->dwMaxPayloadTransferSize = + le32_to_cpu(get_unaligned((__le32 *)&data[22])); + + if (size == 34) { + ctrl->dwClockFrequency = + le32_to_cpu(get_unaligned((__le32 *)&data[26])); + ctrl->bmFramingInfo = data[30]; + ctrl->bPreferedVersion = data[31]; + ctrl->bMinVersion = data[32]; + ctrl->bMaxVersion = data[33]; + } else { + ctrl->dwClockFrequency = video->dev->clock_frequency; + ctrl->bmFramingInfo = 0; + ctrl->bPreferedVersion = 0; + ctrl->bMinVersion = 0; + ctrl->bMaxVersion = 0; + } + + /* Some broken devices return a null or wrong dwMaxVideoFrameSize. + * Try to get the value from the format and frame descriptor. + */ + uvc_fixup_buffer_size(video, ctrl); + + return 0; +} + +int uvc_set_video_ctrl(struct uvc_video_device *video, + struct uvc_streaming_control *ctrl, int probe) +{ + __u8 data[34]; + __u8 size; + + size = video->dev->uvc_version >= 0x0110 ? 34 : 26; + memset(data, 0, sizeof data); + + *(__le16 *)&data[0] = cpu_to_le16(ctrl->bmHint); + data[2] = ctrl->bFormatIndex; + data[3] = ctrl->bFrameIndex; + *(__le32 *)&data[4] = cpu_to_le32(ctrl->dwFrameInterval); + *(__le16 *)&data[8] = cpu_to_le16(ctrl->wKeyFrameRate); + *(__le16 *)&data[10] = cpu_to_le16(ctrl->wPFrameRate); + *(__le16 *)&data[12] = cpu_to_le16(ctrl->wCompQuality); + *(__le16 *)&data[14] = cpu_to_le16(ctrl->wCompWindowSize); + *(__le16 *)&data[16] = cpu_to_le16(ctrl->wDelay); + /* Note: Some of the fields below are not required for IN devices (see + * UVC spec, 4.3.1.1), but we still copy them in case support for OUT + * devices is added in the future. */ + put_unaligned(cpu_to_le32(ctrl->dwMaxVideoFrameSize), + (__le32 *)&data[18]); + put_unaligned(cpu_to_le32(ctrl->dwMaxPayloadTransferSize), + (__le32 *)&data[22]); + + if (size == 34) { + put_unaligned(cpu_to_le32(ctrl->dwClockFrequency), + (__le32 *)&data[26]); + data[30] = ctrl->bmFramingInfo; + data[31] = ctrl->bPreferedVersion; + data[32] = ctrl->bMinVersion; + data[33] = ctrl->bMaxVersion; + } + + return __uvc_query_ctrl(video->dev, SET_CUR, 0, + video->streaming->intfnum, + probe ? VS_PROBE_CONTROL : VS_COMMIT_CONTROL, &data, size, + UVC_CTRL_STREAMING_TIMEOUT); +} + +int uvc_probe_video(struct uvc_video_device *video, + struct uvc_streaming_control *probe) +{ + struct uvc_streaming_control probe_min, probe_max; + __u16 bandwidth; + unsigned int i; + int ret; + + mutex_lock(&video->streaming->mutex); + + /* Perform probing. The device should adjust the requested values + * according to its capabilities. However, some devices, namely the + * first generation UVC Logitech webcams, don't implement the Video + * Probe control properly, and just return the needed bandwidth. For + * that reason, if the needed bandwidth exceeds the maximum available + * bandwidth, try to lower the quality. + */ + if ((ret = uvc_set_video_ctrl(video, probe, 1)) < 0) + goto done; + + /* Get the minimum and maximum values for compression settings. */ + if (!(video->dev->quirks & UVC_QUIRK_PROBE_MINMAX)) { + ret = uvc_get_video_ctrl(video, &probe_min, 1, GET_MIN); + if (ret < 0) + goto done; + ret = uvc_get_video_ctrl(video, &probe_max, 1, GET_MAX); + if (ret < 0) + goto done; + + probe->wCompQuality = probe_max.wCompQuality; + } + + for (i = 0; i < 2; ++i) { + if ((ret = uvc_set_video_ctrl(video, probe, 1)) < 0 || + (ret = uvc_get_video_ctrl(video, probe, 1, GET_CUR)) < 0) + goto done; + + if (video->streaming->intf->num_altsetting == 1) + break; + + bandwidth = probe->dwMaxPayloadTransferSize; + if (bandwidth <= video->streaming->maxpsize) + break; + + if (video->dev->quirks & UVC_QUIRK_PROBE_MINMAX) { + ret = -ENOSPC; + goto done; + } + + /* TODO: negotiate compression parameters */ + probe->wKeyFrameRate = probe_min.wKeyFrameRate; + probe->wPFrameRate = probe_min.wPFrameRate; + probe->wCompQuality = probe_max.wCompQuality; + probe->wCompWindowSize = probe_min.wCompWindowSize; + } + +done: + mutex_unlock(&video->streaming->mutex); + return ret; +} + +/* ------------------------------------------------------------------------ + * Video codecs + */ + +/* Values for bmHeaderInfo (Video and Still Image Payload Headers, 2.4.3.3) */ +#define UVC_STREAM_EOH (1 << 7) +#define UVC_STREAM_ERR (1 << 6) +#define UVC_STREAM_STI (1 << 5) +#define UVC_STREAM_RES (1 << 4) +#define UVC_STREAM_SCR (1 << 3) +#define UVC_STREAM_PTS (1 << 2) +#define UVC_STREAM_EOF (1 << 1) +#define UVC_STREAM_FID (1 << 0) + +/* Video payload decoding is handled by uvc_video_decode_start(), + * uvc_video_decode_data() and uvc_video_decode_end(). + * + * uvc_video_decode_start is called with URB data at the start of a bulk or + * isochronous payload. It processes header data and returns the header size + * in bytes if successful. If an error occurs, it returns a negative error + * code. The following error codes have special meanings. + * + * - EAGAIN informs the caller that the current video buffer should be marked + * as done, and that the function should be called again with the same data + * and a new video buffer. This is used when end of frame conditions can be + * reliably detected at the beginning of the next frame only. + * + * If an error other than -EAGAIN is returned, the caller will drop the current + * payload. No call to uvc_video_decode_data and uvc_video_decode_end will be + * made until the next payload. -ENODATA can be used to drop the current + * payload if no other error code is appropriate. + * + * uvc_video_decode_data is called for every URB with URB data. It copies the + * data to the video buffer. + * + * uvc_video_decode_end is called with header data at the end of a bulk or + * isochronous payload. It performs any additional header data processing and + * returns 0 or a negative error code if an error occured. As header data have + * already been processed by uvc_video_decode_start, this functions isn't + * required to perform sanity checks a second time. + * + * For isochronous transfers where a payload is always transfered in a single + * URB, the three functions will be called in a row. + * + * To let the decoder process header data and update its internal state even + * when no video buffer is available, uvc_video_decode_start must be prepared + * to be called with a NULL buf parameter. uvc_video_decode_data and + * uvc_video_decode_end will never be called with a NULL buffer. + */ +static int uvc_video_decode_start(struct uvc_video_device *video, + struct uvc_buffer *buf, const __u8 *data, int len) +{ + __u8 fid; + + /* Sanity checks: + * - packet must be at least 2 bytes long + * - bHeaderLength value must be at least 2 bytes (see above) + * - bHeaderLength value can't be larger than the packet size. + */ + if (len < 2 || data[0] < 2 || data[0] > len) + return -EINVAL; + + /* Skip payloads marked with the error bit ("error frames"). */ + if (data[1] & UVC_STREAM_ERR) { + uvc_trace(UVC_TRACE_FRAME, "Dropping payload (error bit " + "set).\n"); + return -ENODATA; + } + + fid = data[1] & UVC_STREAM_FID; + + /* Store the payload FID bit and return immediately when the buffer is + * NULL. + */ + if (buf == NULL) { + video->last_fid = fid; + return -ENODATA; + } + + /* Synchronize to the input stream by waiting for the FID bit to be + * toggled when the the buffer state is not UVC_BUF_STATE_ACTIVE. + * queue->last_fid is initialized to -1, so the first isochronous + * frame will always be in sync. + * + * If the device doesn't toggle the FID bit, invert video->last_fid + * when the EOF bit is set to force synchronisation on the next packet. + */ + if (buf->state != UVC_BUF_STATE_ACTIVE) { + if (fid == video->last_fid) { + uvc_trace(UVC_TRACE_FRAME, "Dropping payload (out of " + "sync).\n"); + if ((video->dev->quirks & UVC_QUIRK_STREAM_NO_FID) && + (data[1] & UVC_STREAM_EOF)) + video->last_fid ^= UVC_STREAM_FID; + return -ENODATA; + } + + /* TODO: Handle PTS and SCR. */ + buf->state = UVC_BUF_STATE_ACTIVE; + } + + /* Mark the buffer as done if we're at the beginning of a new frame. + * End of frame detection is better implemented by checking the EOF + * bit (FID bit toggling is delayed by one frame compared to the EOF + * bit), but some devices don't set the bit at end of frame (and the + * last payload can be lost anyway). We thus must check if the FID has + * been toggled. + * + * queue->last_fid is initialized to -1, so the first isochronous + * frame will never trigger an end of frame detection. + * + * Empty buffers (bytesused == 0) don't trigger end of frame detection + * as it doesn't make sense to return an empty buffer. This also + * avoids detecting and of frame conditions at FID toggling if the + * previous payload had the EOF bit set. + */ + if (fid != video->last_fid && buf->buf.bytesused != 0) { + uvc_trace(UVC_TRACE_FRAME, "Frame complete (FID bit " + "toggled).\n"); + buf->state = UVC_BUF_STATE_DONE; + return -EAGAIN; + } + + video->last_fid = fid; + + return data[0]; +} + +static void uvc_video_decode_data(struct uvc_video_device *video, + struct uvc_buffer *buf, const __u8 *data, int len) +{ + struct uvc_video_queue *queue = &video->queue; + unsigned int maxlen, nbytes; + void *mem; + + if (len <= 0) + return; + + /* Copy the video data to the buffer. */ + maxlen = buf->buf.length - buf->buf.bytesused; + mem = queue->mem + buf->buf.m.offset + buf->buf.bytesused; + nbytes = min((unsigned int)len, maxlen); + memcpy(mem, data, nbytes); + buf->buf.bytesused += nbytes; + + /* Complete the current frame if the buffer size was exceeded. */ + if (len > maxlen) { + uvc_trace(UVC_TRACE_FRAME, "Frame complete (overflow).\n"); + buf->state = UVC_BUF_STATE_DONE; + } +} + +static void uvc_video_decode_end(struct uvc_video_device *video, + struct uvc_buffer *buf, const __u8 *data, int len) +{ + /* Mark the buffer as done if the EOF marker is set. */ + if (data[1] & UVC_STREAM_EOF && buf->buf.bytesused != 0) { + uvc_trace(UVC_TRACE_FRAME, "Frame complete (EOF found).\n"); + if (data[0] == len) + uvc_trace(UVC_TRACE_FRAME, "EOF in empty payload.\n"); + buf->state = UVC_BUF_STATE_DONE; + if (video->dev->quirks & UVC_QUIRK_STREAM_NO_FID) + video->last_fid ^= UVC_STREAM_FID; + } +} + +/* ------------------------------------------------------------------------ + * URB handling + */ + +/* + * Completion handler for video URBs. + */ +static void uvc_video_decode_isoc(struct urb *urb, + struct uvc_video_device *video, struct uvc_buffer *buf) +{ + u8 *mem; + int ret, i; + + for (i = 0; i < urb->number_of_packets; ++i) { + if (urb->iso_frame_desc[i].status < 0) { + uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame " + "lost (%d).\n", urb->iso_frame_desc[i].status); + continue; + } + + /* Decode the payload header. */ + mem = urb->transfer_buffer + urb->iso_frame_desc[i].offset; + do { + ret = uvc_video_decode_start(video, buf, mem, + urb->iso_frame_desc[i].actual_length); + if (ret == -EAGAIN) + buf = uvc_queue_next_buffer(&video->queue, buf); + } while (ret == -EAGAIN); + + if (ret < 0) + continue; + + /* Decode the payload data. */ + uvc_video_decode_data(video, buf, mem + ret, + urb->iso_frame_desc[i].actual_length - ret); + + /* Process the header again. */ + uvc_video_decode_end(video, buf, mem, ret); + + if (buf->state == UVC_BUF_STATE_DONE || + buf->state == UVC_BUF_STATE_ERROR) + buf = uvc_queue_next_buffer(&video->queue, buf); + } +} + +static void uvc_video_decode_bulk(struct urb *urb, + struct uvc_video_device *video, struct uvc_buffer *buf) +{ + u8 *mem; + int len, ret; + + mem = urb->transfer_buffer; + len = urb->actual_length; + video->bulk.payload_size += len; + + /* If the URB is the first of its payload, decode and save the + * header. + */ + if (video->bulk.header_size == 0) { + do { + ret = uvc_video_decode_start(video, buf, mem, len); + if (ret == -EAGAIN) + buf = uvc_queue_next_buffer(&video->queue, buf); + } while (ret == -EAGAIN); + + /* If an error occured skip the rest of the payload. */ + if (ret < 0 || buf == NULL) { + video->bulk.skip_payload = 1; + return; + } + + video->bulk.header_size = ret; + memcpy(video->bulk.header, mem, video->bulk.header_size); + + mem += ret; + len -= ret; + } + + /* The buffer queue might have been cancelled while a bulk transfer + * was in progress, so we can reach here with buf equal to NULL. Make + * sure buf is never dereferenced if NULL. + */ + + /* Process video data. */ + if (!video->bulk.skip_payload && buf != NULL) + uvc_video_decode_data(video, buf, mem, len); + + /* Detect the payload end by a URB smaller than the maximum size (or + * a payload size equal to the maximum) and process the header again. + */ + if (urb->actual_length < urb->transfer_buffer_length || + video->bulk.payload_size >= video->bulk.max_payload_size) { + if (!video->bulk.skip_payload && buf != NULL) { + uvc_video_decode_end(video, buf, video->bulk.header, + video->bulk.header_size); + if (buf->state == UVC_BUF_STATE_DONE || + buf->state == UVC_BUF_STATE_ERROR) + buf = uvc_queue_next_buffer(&video->queue, buf); + } + + video->bulk.header_size = 0; + video->bulk.skip_payload = 0; + video->bulk.payload_size = 0; + } +} + +static void uvc_video_complete(struct urb *urb) +{ + struct uvc_video_device *video = urb->context; + struct uvc_video_queue *queue = &video->queue; + struct uvc_buffer *buf = NULL; + unsigned long flags; + int ret; + + switch (urb->status) { + case 0: + break; + + default: + uvc_printk(KERN_WARNING, "Non-zero status (%d) in video " + "completion handler.\n", urb->status); + + case -ENOENT: /* usb_kill_urb() called. */ + if (video->frozen) + return; + + case -ECONNRESET: /* usb_unlink_urb() called. */ + case -ESHUTDOWN: /* The endpoint is being disabled. */ + uvc_queue_cancel(queue, urb->status == -ESHUTDOWN); + return; + } + + spin_lock_irqsave(&queue->irqlock, flags); + if (!list_empty(&queue->irqqueue)) + buf = list_first_entry(&queue->irqqueue, struct uvc_buffer, + queue); + spin_unlock_irqrestore(&queue->irqlock, flags); + + video->decode(urb, video, buf); + + if ((ret = usb_submit_urb(urb, GFP_ATOMIC)) < 0) { + uvc_printk(KERN_ERR, "Failed to resubmit video URB (%d).\n", + ret); + } +} + +/* + * Uninitialize isochronous/bulk URBs and free transfer buffers. + */ +static void uvc_uninit_video(struct uvc_video_device *video) +{ + struct urb *urb; + unsigned int i; + + for (i = 0; i < UVC_URBS; ++i) { + if ((urb = video->urb[i]) == NULL) + continue; + + usb_kill_urb(urb); + /* urb->transfer_buffer_length is not touched by USB core, so + * we can use it here as the buffer length. + */ + if (video->urb_buffer[i]) { + usb_buffer_free(video->dev->udev, + urb->transfer_buffer_length, + video->urb_buffer[i], urb->transfer_dma); + video->urb_buffer[i] = NULL; + } + + usb_free_urb(urb); + video->urb[i] = NULL; + } +} + +/* + * Initialize isochronous URBs and allocate transfer buffers. The packet size + * is given by the endpoint. + */ +static int uvc_init_video_isoc(struct uvc_video_device *video, + struct usb_host_endpoint *ep) +{ + struct urb *urb; + unsigned int npackets, i, j; + __u16 psize; + __u32 size; + + /* Compute the number of isochronous packets to allocate by dividing + * the maximum video frame size by the packet size. Limit the result + * to UVC_MAX_ISO_PACKETS. + */ + psize = le16_to_cpu(ep->desc.wMaxPacketSize); + psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); + + size = video->streaming->ctrl.dwMaxVideoFrameSize; + if (size > UVC_MAX_FRAME_SIZE) + return -EINVAL; + + npackets = (size + psize - 1) / psize; + if (npackets > UVC_MAX_ISO_PACKETS) + npackets = UVC_MAX_ISO_PACKETS; + + size = npackets * psize; + + for (i = 0; i < UVC_URBS; ++i) { + urb = usb_alloc_urb(npackets, GFP_KERNEL); + if (urb == NULL) { + uvc_uninit_video(video); + return -ENOMEM; + } + + video->urb_buffer[i] = usb_buffer_alloc(video->dev->udev, + size, GFP_KERNEL, &urb->transfer_dma); + if (video->urb_buffer[i] == NULL) { + usb_free_urb(urb); + uvc_uninit_video(video); + return -ENOMEM; + } + + urb->dev = video->dev->udev; + urb->context = video; + urb->pipe = usb_rcvisocpipe(video->dev->udev, + ep->desc.bEndpointAddress); + urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->interval = ep->desc.bInterval; + urb->transfer_buffer = video->urb_buffer[i]; + urb->complete = uvc_video_complete; + urb->number_of_packets = npackets; + urb->transfer_buffer_length = size; + + for (j = 0; j < npackets; ++j) { + urb->iso_frame_desc[j].offset = j * psize; + urb->iso_frame_desc[j].length = psize; + } + + video->urb[i] = urb; + } + + return 0; +} + +/* + * Initialize bulk URBs and allocate transfer buffers. The packet size is + * given by the endpoint. + */ +static int uvc_init_video_bulk(struct uvc_video_device *video, + struct usb_host_endpoint *ep) +{ + struct urb *urb; + unsigned int pipe, i; + __u16 psize; + __u32 size; + + /* Compute the bulk URB size. Some devices set the maximum payload + * size to a value too high for memory-constrained devices. We must + * then transfer the payload accross multiple URBs. To be consistant + * with isochronous mode, allocate maximum UVC_MAX_ISO_PACKETS per bulk + * URB. + */ + psize = le16_to_cpu(ep->desc.wMaxPacketSize) & 0x07ff; + size = video->streaming->ctrl.dwMaxPayloadTransferSize; + video->bulk.max_payload_size = size; + if (size > psize * UVC_MAX_ISO_PACKETS) + size = psize * UVC_MAX_ISO_PACKETS; + + pipe = usb_rcvbulkpipe(video->dev->udev, ep->desc.bEndpointAddress); + + for (i = 0; i < UVC_URBS; ++i) { + urb = usb_alloc_urb(0, GFP_KERNEL); + if (urb == NULL) { + uvc_uninit_video(video); + return -ENOMEM; + } + + video->urb_buffer[i] = usb_buffer_alloc(video->dev->udev, + size, GFP_KERNEL, &urb->transfer_dma); + if (video->urb_buffer[i] == NULL) { + usb_free_urb(urb); + uvc_uninit_video(video); + return -ENOMEM; + } + + usb_fill_bulk_urb(urb, video->dev->udev, pipe, + video->urb_buffer[i], size, uvc_video_complete, + video); + urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; + + video->urb[i] = urb; + } + + return 0; +} + +/* + * Initialize isochronous/bulk URBs and allocate transfer buffers. + */ +static int uvc_init_video(struct uvc_video_device *video) +{ + struct usb_interface *intf = video->streaming->intf; + struct usb_host_interface *alts; + struct usb_host_endpoint *ep = NULL; + int intfnum = video->streaming->intfnum; + unsigned int bandwidth, psize, i; + int ret; + + video->last_fid = -1; + video->bulk.header_size = 0; + video->bulk.skip_payload = 0; + video->bulk.payload_size = 0; + + if (intf->num_altsetting > 1) { + /* Isochronous endpoint, select the alternate setting. */ + bandwidth = video->streaming->ctrl.dwMaxPayloadTransferSize; + + if (bandwidth == 0) { + uvc_printk(KERN_WARNING, "device %s requested null " + "bandwidth, defaulting to lowest.\n", + video->vdev->name); + bandwidth = 1; + } + + for (i = 0; i < intf->num_altsetting; ++i) { + alts = &intf->altsetting[i]; + ep = uvc_find_endpoint(alts, + video->streaming->header.bEndpointAddress); + if (ep == NULL) + continue; + + /* Check if the bandwidth is high enough. */ + psize = le16_to_cpu(ep->desc.wMaxPacketSize); + psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); + if (psize >= bandwidth) + break; + } + + if (i >= intf->num_altsetting) + return -EIO; + + if ((ret = usb_set_interface(video->dev->udev, intfnum, i)) < 0) + return ret; + + ret = uvc_init_video_isoc(video, ep); + } else { + /* Bulk endpoint, proceed to URB initialization. */ + ep = uvc_find_endpoint(&intf->altsetting[0], + video->streaming->header.bEndpointAddress); + if (ep == NULL) + return -EIO; + + ret = uvc_init_video_bulk(video, ep); + } + + if (ret < 0) + return ret; + + /* Submit the URBs. */ + for (i = 0; i < UVC_URBS; ++i) { + if ((ret = usb_submit_urb(video->urb[i], GFP_KERNEL)) < 0) { + uvc_printk(KERN_ERR, "Failed to submit URB %u " + "(%d).\n", i, ret); + uvc_uninit_video(video); + return ret; + } + } + + return 0; +} + +/* -------------------------------------------------------------------------- + * Suspend/resume + */ + +/* + * Stop streaming without disabling the video queue. + * + * To let userspace applications resume without trouble, we must not touch the + * video buffers in any way. We mark the device as frozen to make sure the URB + * completion handler won't try to cancel the queue when we kill the URBs. + */ +int uvc_video_suspend(struct uvc_video_device *video) +{ + if (!uvc_queue_streaming(&video->queue)) + return 0; + + video->frozen = 1; + uvc_uninit_video(video); + usb_set_interface(video->dev->udev, video->streaming->intfnum, 0); + return 0; +} + +/* + * Reconfigure the video interface and restart streaming if it was enable + * before suspend. + * + * If an error occurs, disable the video queue. This will wake all pending + * buffers, making sure userspace applications are notified of the problem + * instead of waiting forever. + */ +int uvc_video_resume(struct uvc_video_device *video) +{ + int ret; + + video->frozen = 0; + + if ((ret = uvc_set_video_ctrl(video, &video->streaming->ctrl, 0)) < 0) { + uvc_queue_enable(&video->queue, 0); + return ret; + } + + if (!uvc_queue_streaming(&video->queue)) + return 0; + + if ((ret = uvc_init_video(video)) < 0) + uvc_queue_enable(&video->queue, 0); + + return ret; +} + +/* ------------------------------------------------------------------------ + * Video device + */ + +/* + * Initialize the UVC video device by retrieving the default format and + * committing it. + * + * Some cameras (namely the Fuji Finepix) set the format and frame + * indexes to zero. The UVC standard doesn't clearly make this a spec + * violation, so try to silently fix the values if possible. + * + * This function is called before registering the device with V4L. + */ +int uvc_video_init(struct uvc_video_device *video) +{ + struct uvc_streaming_control *probe = &video->streaming->ctrl; + struct uvc_format *format = NULL; + struct uvc_frame *frame = NULL; + unsigned int i; + int ret; + + if (video->streaming->nformats == 0) { + uvc_printk(KERN_INFO, "No supported video formats found.\n"); + return -EINVAL; + } + + /* Alternate setting 0 should be the default, yet the XBox Live Vision + * Cam (and possibly other devices) crash or otherwise misbehave if + * they don't receive a SET_INTERFACE request before any other video + * control request. + */ + usb_set_interface(video->dev->udev, video->streaming->intfnum, 0); + + /* Some webcams don't suport GET_DEF request on the probe control. We + * fall back to GET_CUR if GET_DEF fails. + */ + if ((ret = uvc_get_video_ctrl(video, probe, 1, GET_DEF)) < 0 && + (ret = uvc_get_video_ctrl(video, probe, 1, GET_CUR)) < 0) + return ret; + + /* Check if the default format descriptor exists. Use the first + * available format otherwise. + */ + for (i = video->streaming->nformats; i > 0; --i) { + format = &video->streaming->format[i-1]; + if (format->index == probe->bFormatIndex) + break; + } + + if (format->nframes == 0) { + uvc_printk(KERN_INFO, "No frame descriptor found for the " + "default format.\n"); + return -EINVAL; + } + + /* Zero bFrameIndex might be correct. Stream-based formats (including + * MPEG-2 TS and DV) do not support frames but have a dummy frame + * descriptor with bFrameIndex set to zero. If the default frame + * descriptor is not found, use the first avalable frame. + */ + for (i = format->nframes; i > 0; --i) { + frame = &format->frame[i-1]; + if (frame->bFrameIndex == probe->bFrameIndex) + break; + } + + /* Commit the default settings. */ + probe->bFormatIndex = format->index; + probe->bFrameIndex = frame->bFrameIndex; + if ((ret = uvc_set_video_ctrl(video, probe, 0)) < 0) + return ret; + + video->streaming->cur_format = format; + video->streaming->cur_frame = frame; + atomic_set(&video->active, 0); + + /* Select the video decoding function */ + if (video->dev->quirks & UVC_QUIRK_BUILTIN_ISIGHT) + video->decode = uvc_video_decode_isight; + else if (video->streaming->intf->num_altsetting > 1) + video->decode = uvc_video_decode_isoc; + else + video->decode = uvc_video_decode_bulk; + + return 0; +} + +/* + * Enable or disable the video stream. + */ +int uvc_video_enable(struct uvc_video_device *video, int enable) +{ + int ret; + + if (!enable) { + uvc_uninit_video(video); + usb_set_interface(video->dev->udev, + video->streaming->intfnum, 0); + uvc_queue_enable(&video->queue, 0); + return 0; + } + + if ((ret = uvc_queue_enable(&video->queue, 1)) < 0) + return ret; + + return uvc_init_video(video); +} diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h new file mode 100644 index 000000000000..a995a780db1c --- /dev/null +++ b/drivers/media/video/uvc/uvcvideo.h @@ -0,0 +1,796 @@ +#ifndef _USB_VIDEO_H_ +#define _USB_VIDEO_H_ + +#include <linux/kernel.h> +#include <linux/videodev2.h> + + +/* + * Dynamic controls + */ + +/* Data types for UVC control data */ +#define UVC_CTRL_DATA_TYPE_RAW 0 +#define UVC_CTRL_DATA_TYPE_SIGNED 1 +#define UVC_CTRL_DATA_TYPE_UNSIGNED 2 +#define UVC_CTRL_DATA_TYPE_BOOLEAN 3 +#define UVC_CTRL_DATA_TYPE_ENUM 4 +#define UVC_CTRL_DATA_TYPE_BITMASK 5 + +/* Control flags */ +#define UVC_CONTROL_SET_CUR (1 << 0) +#define UVC_CONTROL_GET_CUR (1 << 1) +#define UVC_CONTROL_GET_MIN (1 << 2) +#define UVC_CONTROL_GET_MAX (1 << 3) +#define UVC_CONTROL_GET_RES (1 << 4) +#define UVC_CONTROL_GET_DEF (1 << 5) +/* Control should be saved at suspend and restored at resume. */ +#define UVC_CONTROL_RESTORE (1 << 6) +/* Control can be updated by the camera. */ +#define UVC_CONTROL_AUTO_UPDATE (1 << 7) + +#define UVC_CONTROL_GET_RANGE (UVC_CONTROL_GET_CUR | UVC_CONTROL_GET_MIN | \ + UVC_CONTROL_GET_MAX | UVC_CONTROL_GET_RES | \ + UVC_CONTROL_GET_DEF) + +struct uvc_xu_control_info { + __u8 entity[16]; + __u8 index; + __u8 selector; + __u16 size; + __u32 flags; +}; + +struct uvc_xu_control_mapping { + __u32 id; + __u8 name[32]; + __u8 entity[16]; + __u8 selector; + + __u8 size; + __u8 offset; + enum v4l2_ctrl_type v4l2_type; + __u32 data_type; +}; + +struct uvc_xu_control { + __u8 unit; + __u8 selector; + __u16 size; + __u8 __user *data; +}; + +#define UVCIOC_CTRL_ADD _IOW('U', 1, struct uvc_xu_control_info) +#define UVCIOC_CTRL_MAP _IOWR('U', 2, struct uvc_xu_control_mapping) +#define UVCIOC_CTRL_GET _IOWR('U', 3, struct uvc_xu_control) +#define UVCIOC_CTRL_SET _IOW('U', 4, struct uvc_xu_control) + +#ifdef __KERNEL__ + +#include <linux/poll.h> + +/* -------------------------------------------------------------------------- + * UVC constants + */ + +#define SC_UNDEFINED 0x00 +#define SC_VIDEOCONTROL 0x01 +#define SC_VIDEOSTREAMING 0x02 +#define SC_VIDEO_INTERFACE_COLLECTION 0x03 + +#define PC_PROTOCOL_UNDEFINED 0x00 + +#define CS_UNDEFINED 0x20 +#define CS_DEVICE 0x21 +#define CS_CONFIGURATION 0x22 +#define CS_STRING 0x23 +#define CS_INTERFACE 0x24 +#define CS_ENDPOINT 0x25 + +/* VideoControl class specific interface descriptor */ +#define VC_DESCRIPTOR_UNDEFINED 0x00 +#define VC_HEADER 0x01 +#define VC_INPUT_TERMINAL 0x02 +#define VC_OUTPUT_TERMINAL 0x03 +#define VC_SELECTOR_UNIT 0x04 +#define VC_PROCESSING_UNIT 0x05 +#define VC_EXTENSION_UNIT 0x06 + +/* VideoStreaming class specific interface descriptor */ +#define VS_UNDEFINED 0x00 +#define VS_INPUT_HEADER 0x01 +#define VS_OUTPUT_HEADER 0x02 +#define VS_STILL_IMAGE_FRAME 0x03 +#define VS_FORMAT_UNCOMPRESSED 0x04 +#define VS_FRAME_UNCOMPRESSED 0x05 +#define VS_FORMAT_MJPEG 0x06 +#define VS_FRAME_MJPEG 0x07 +#define VS_FORMAT_MPEG2TS 0x0a +#define VS_FORMAT_DV 0x0c +#define VS_COLORFORMAT 0x0d +#define VS_FORMAT_FRAME_BASED 0x10 +#define VS_FRAME_FRAME_BASED 0x11 +#define VS_FORMAT_STREAM_BASED 0x12 + +/* Endpoint type */ +#define EP_UNDEFINED 0x00 +#define EP_GENERAL 0x01 +#define EP_ENDPOINT 0x02 +#define EP_INTERRUPT 0x03 + +/* Request codes */ +#define RC_UNDEFINED 0x00 +#define SET_CUR 0x01 +#define GET_CUR 0x81 +#define GET_MIN 0x82 +#define GET_MAX 0x83 +#define GET_RES 0x84 +#define GET_LEN 0x85 +#define GET_INFO 0x86 +#define GET_DEF 0x87 + +/* VideoControl interface controls */ +#define VC_CONTROL_UNDEFINED 0x00 +#define VC_VIDEO_POWER_MODE_CONTROL 0x01 +#define VC_REQUEST_ERROR_CODE_CONTROL 0x02 + +/* Terminal controls */ +#define TE_CONTROL_UNDEFINED 0x00 + +/* Selector Unit controls */ +#define SU_CONTROL_UNDEFINED 0x00 +#define SU_INPUT_SELECT_CONTROL 0x01 + +/* Camera Terminal controls */ +#define CT_CONTROL_UNDEFINED 0x00 +#define CT_SCANNING_MODE_CONTROL 0x01 +#define CT_AE_MODE_CONTROL 0x02 +#define CT_AE_PRIORITY_CONTROL 0x03 +#define CT_EXPOSURE_TIME_ABSOLUTE_CONTROL 0x04 +#define CT_EXPOSURE_TIME_RELATIVE_CONTROL 0x05 +#define CT_FOCUS_ABSOLUTE_CONTROL 0x06 +#define CT_FOCUS_RELATIVE_CONTROL 0x07 +#define CT_FOCUS_AUTO_CONTROL 0x08 +#define CT_IRIS_ABSOLUTE_CONTROL 0x09 +#define CT_IRIS_RELATIVE_CONTROL 0x0a +#define CT_ZOOM_ABSOLUTE_CONTROL 0x0b +#define CT_ZOOM_RELATIVE_CONTROL 0x0c +#define CT_PANTILT_ABSOLUTE_CONTROL 0x0d +#define CT_PANTILT_RELATIVE_CONTROL 0x0e +#define CT_ROLL_ABSOLUTE_CONTROL 0x0f +#define CT_ROLL_RELATIVE_CONTROL 0x10 +#define CT_PRIVACY_CONTROL 0x11 + +/* Processing Unit controls */ +#define PU_CONTROL_UNDEFINED 0x00 +#define PU_BACKLIGHT_COMPENSATION_CONTROL 0x01 +#define PU_BRIGHTNESS_CONTROL 0x02 +#define PU_CONTRAST_CONTROL 0x03 +#define PU_GAIN_CONTROL 0x04 +#define PU_POWER_LINE_FREQUENCY_CONTROL 0x05 +#define PU_HUE_CONTROL 0x06 +#define PU_SATURATION_CONTROL 0x07 +#define PU_SHARPNESS_CONTROL 0x08 +#define PU_GAMMA_CONTROL 0x09 +#define PU_WHITE_BALANCE_TEMPERATURE_CONTROL 0x0a +#define PU_WHITE_BALANCE_TEMPERATURE_AUTO_CONTROL 0x0b +#define PU_WHITE_BALANCE_COMPONENT_CONTROL 0x0c +#define PU_WHITE_BALANCE_COMPONENT_AUTO_CONTROL 0x0d +#define PU_DIGITAL_MULTIPLIER_CONTROL 0x0e +#define PU_DIGITAL_MULTIPLIER_LIMIT_CONTROL 0x0f +#define PU_HUE_AUTO_CONTROL 0x10 +#define PU_ANALOG_VIDEO_STANDARD_CONTROL 0x11 +#define PU_ANALOG_LOCK_STATUS_CONTROL 0x12 + +#define LXU_MOTOR_PANTILT_RELATIVE_CONTROL 0x01 +#define LXU_MOTOR_PANTILT_RESET_CONTROL 0x02 +#define LXU_MOTOR_FOCUS_MOTOR_CONTROL 0x03 + +/* VideoStreaming interface controls */ +#define VS_CONTROL_UNDEFINED 0x00 +#define VS_PROBE_CONTROL 0x01 +#define VS_COMMIT_CONTROL 0x02 +#define VS_STILL_PROBE_CONTROL 0x03 +#define VS_STILL_COMMIT_CONTROL 0x04 +#define VS_STILL_IMAGE_TRIGGER_CONTROL 0x05 +#define VS_STREAM_ERROR_CODE_CONTROL 0x06 +#define VS_GENERATE_KEY_FRAME_CONTROL 0x07 +#define VS_UPDATE_FRAME_SEGMENT_CONTROL 0x08 +#define VS_SYNC_DELAY_CONTROL 0x09 + +#define TT_VENDOR_SPECIFIC 0x0100 +#define TT_STREAMING 0x0101 + +/* Input Terminal types */ +#define ITT_VENDOR_SPECIFIC 0x0200 +#define ITT_CAMERA 0x0201 +#define ITT_MEDIA_TRANSPORT_INPUT 0x0202 + +/* Output Terminal types */ +#define OTT_VENDOR_SPECIFIC 0x0300 +#define OTT_DISPLAY 0x0301 +#define OTT_MEDIA_TRANSPORT_OUTPUT 0x0302 + +/* External Terminal types */ +#define EXTERNAL_VENDOR_SPECIFIC 0x0400 +#define COMPOSITE_CONNECTOR 0x0401 +#define SVIDEO_CONNECTOR 0x0402 +#define COMPONENT_CONNECTOR 0x0403 + +#define UVC_TERM_INPUT 0x0000 +#define UVC_TERM_OUTPUT 0x8000 + +#define UVC_ENTITY_TYPE(entity) ((entity)->type & 0x7fff) +#define UVC_ENTITY_IS_UNIT(entity) (((entity)->type & 0xff00) == 0) +#define UVC_ENTITY_IS_TERM(entity) (((entity)->type & 0xff00) != 0) +#define UVC_ENTITY_IS_ITERM(entity) \ + (((entity)->type & 0x8000) == UVC_TERM_INPUT) +#define UVC_ENTITY_IS_OTERM(entity) \ + (((entity)->type & 0x8000) == UVC_TERM_OUTPUT) + +#define UVC_STATUS_TYPE_CONTROL 1 +#define UVC_STATUS_TYPE_STREAMING 2 + +/* ------------------------------------------------------------------------ + * GUIDs + */ +#define UVC_GUID_UVC_CAMERA \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} +#define UVC_GUID_UVC_OUTPUT \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02} +#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03} +#define UVC_GUID_UVC_PROCESSING \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01} +#define UVC_GUID_UVC_SELECTOR \ + {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02} + +#define UVC_GUID_LOGITECH_DEV_INFO \ + {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \ + 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1e} +#define UVC_GUID_LOGITECH_USER_HW \ + {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \ + 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x1f} +#define UVC_GUID_LOGITECH_VIDEO \ + {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \ + 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x50} +#define UVC_GUID_LOGITECH_MOTOR \ + {0x82, 0x06, 0x61, 0x63, 0x70, 0x50, 0xab, 0x49, \ + 0xb8, 0xcc, 0xb3, 0x85, 0x5e, 0x8d, 0x22, 0x56} + +#define UVC_GUID_FORMAT_MJPEG \ + { 'M', 'J', 'P', 'G', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_YUY2 \ + { 'Y', 'U', 'Y', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_NV12 \ + { 'N', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_YV12 \ + { 'Y', 'V', '1', '2', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_I420 \ + { 'I', '4', '2', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_UYVY \ + { 'U', 'Y', 'V', 'Y', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_Y800 \ + { 'Y', '8', '0', '0', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} +#define UVC_GUID_FORMAT_BY8 \ + { 'B', 'Y', '8', ' ', 0x00, 0x00, 0x10, 0x00, \ + 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71} + + +/* ------------------------------------------------------------------------ + * Driver specific constants. + */ + +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0) + +/* Number of isochronous URBs. */ +#define UVC_URBS 5 +/* Maximum number of packets per isochronous URB. */ +#define UVC_MAX_ISO_PACKETS 40 +/* Maximum frame size in bytes, for sanity checking. */ +#define UVC_MAX_FRAME_SIZE (16*1024*1024) +/* Maximum number of video buffers. */ +#define UVC_MAX_VIDEO_BUFFERS 32 + +#define UVC_CTRL_CONTROL_TIMEOUT 300 +#define UVC_CTRL_STREAMING_TIMEOUT 1000 + +/* Devices quirks */ +#define UVC_QUIRK_STATUS_INTERVAL 0x00000001 +#define UVC_QUIRK_PROBE_MINMAX 0x00000002 +#define UVC_QUIRK_PROBE_EXTRAFIELDS 0x00000004 +#define UVC_QUIRK_BUILTIN_ISIGHT 0x00000008 +#define UVC_QUIRK_STREAM_NO_FID 0x00000010 +#define UVC_QUIRK_IGNORE_SELECTOR_UNIT 0x00000020 + +/* Format flags */ +#define UVC_FMT_FLAG_COMPRESSED 0x00000001 +#define UVC_FMT_FLAG_STREAM 0x00000002 + +/* ------------------------------------------------------------------------ + * Structures. + */ + +struct uvc_device; + +/* TODO: Put the most frequently accessed fields at the beginning of + * structures to maximize cache efficiency. + */ +struct uvc_streaming_control { + __u16 bmHint; + __u8 bFormatIndex; + __u8 bFrameIndex; + __u32 dwFrameInterval; + __u16 wKeyFrameRate; + __u16 wPFrameRate; + __u16 wCompQuality; + __u16 wCompWindowSize; + __u16 wDelay; + __u32 dwMaxVideoFrameSize; + __u32 dwMaxPayloadTransferSize; + __u32 dwClockFrequency; + __u8 bmFramingInfo; + __u8 bPreferedVersion; + __u8 bMinVersion; + __u8 bMaxVersion; +}; + +struct uvc_menu_info { + __u32 value; + __u8 name[32]; +}; + +struct uvc_control_info { + struct list_head list; + struct list_head mappings; + + __u8 entity[16]; + __u8 index; + __u8 selector; + + __u16 size; + __u32 flags; +}; + +struct uvc_control_mapping { + struct list_head list; + + struct uvc_control_info *ctrl; + + __u32 id; + __u8 name[32]; + __u8 entity[16]; + __u8 selector; + + __u8 size; + __u8 offset; + enum v4l2_ctrl_type v4l2_type; + __u32 data_type; + + struct uvc_menu_info *menu_info; + __u32 menu_count; +}; + +struct uvc_control { + struct uvc_entity *entity; + struct uvc_control_info *info; + + __u8 index; /* Used to match the uvc_control entry with a + uvc_control_info. */ + __u8 dirty : 1, + loaded : 1, + modified : 1; + + __u8 *data; +}; + +struct uvc_format_desc { + char *name; + __u8 guid[16]; + __u32 fcc; +}; + +/* The term 'entity' refers to both UVC units and UVC terminals. + * + * The type field is either the terminal type (wTerminalType in the terminal + * descriptor), or the unit type (bDescriptorSubtype in the unit descriptor). + * As the bDescriptorSubtype field is one byte long, the type value will + * always have a null MSB for units. All terminal types defined by the UVC + * specification have a non-null MSB, so it is safe to use the MSB to + * differentiate between units and terminals as long as the descriptor parsing + * code makes sure terminal types have a non-null MSB. + * + * For terminals, the type's most significant bit stores the terminal + * direction (either UVC_TERM_INPUT or UVC_TERM_OUTPUT). The type field should + * always be accessed with the UVC_ENTITY_* macros and never directly. + */ + +struct uvc_entity { + struct list_head list; /* Entity as part of a UVC device. */ + struct list_head chain; /* Entity as part of a video device + * chain. */ + __u8 id; + __u16 type; + char name[64]; + + union { + struct { + __u16 wObjectiveFocalLengthMin; + __u16 wObjectiveFocalLengthMax; + __u16 wOcularFocalLength; + __u8 bControlSize; + __u8 *bmControls; + } camera; + + struct { + __u8 bControlSize; + __u8 *bmControls; + __u8 bTransportModeSize; + __u8 *bmTransportModes; + } media; + + struct { + __u8 bSourceID; + } output; + + struct { + __u8 bSourceID; + __u16 wMaxMultiplier; + __u8 bControlSize; + __u8 *bmControls; + __u8 bmVideoStandards; + } processing; + + struct { + __u8 bNrInPins; + __u8 *baSourceID; + } selector; + + struct { + __u8 guidExtensionCode[16]; + __u8 bNumControls; + __u8 bNrInPins; + __u8 *baSourceID; + __u8 bControlSize; + __u8 *bmControls; + __u8 *bmControlsType; + } extension; + }; + + unsigned int ncontrols; + struct uvc_control *controls; +}; + +struct uvc_frame { + __u8 bFrameIndex; + __u8 bmCapabilities; + __u16 wWidth; + __u16 wHeight; + __u32 dwMinBitRate; + __u32 dwMaxBitRate; + __u32 dwMaxVideoFrameBufferSize; + __u8 bFrameIntervalType; + __u32 dwDefaultFrameInterval; + __u32 *dwFrameInterval; +}; + +struct uvc_format { + __u8 type; + __u8 index; + __u8 bpp; + __u8 colorspace; + __u32 fcc; + __u32 flags; + + char name[32]; + + unsigned int nframes; + struct uvc_frame *frame; +}; + +struct uvc_streaming_header { + __u8 bNumFormats; + __u8 bEndpointAddress; + __u8 bTerminalLink; + __u8 bControlSize; + __u8 *bmaControls; + /* The following fields are used by input headers only. */ + __u8 bmInfo; + __u8 bStillCaptureMethod; + __u8 bTriggerSupport; + __u8 bTriggerUsage; +}; + +struct uvc_streaming { + struct list_head list; + + struct usb_interface *intf; + int intfnum; + __u16 maxpsize; + + struct uvc_streaming_header header; + + unsigned int nformats; + struct uvc_format *format; + + struct uvc_streaming_control ctrl; + struct uvc_format *cur_format; + struct uvc_frame *cur_frame; + + struct mutex mutex; +}; + +enum uvc_buffer_state { + UVC_BUF_STATE_IDLE = 0, + UVC_BUF_STATE_QUEUED = 1, + UVC_BUF_STATE_ACTIVE = 2, + UVC_BUF_STATE_DONE = 3, + UVC_BUF_STATE_ERROR = 4, +}; + +struct uvc_buffer { + unsigned long vma_use_count; + struct list_head stream; + + /* Touched by interrupt handler. */ + struct v4l2_buffer buf; + struct list_head queue; + wait_queue_head_t wait; + enum uvc_buffer_state state; +}; + +#define UVC_QUEUE_STREAMING (1 << 0) +#define UVC_QUEUE_DISCONNECTED (1 << 1) +#define UVC_QUEUE_DROP_INCOMPLETE (1 << 2) + +struct uvc_video_queue { + void *mem; + unsigned int flags; + __u32 sequence; + + unsigned int count; + unsigned int buf_size; + struct uvc_buffer buffer[UVC_MAX_VIDEO_BUFFERS]; + struct mutex mutex; /* protects buffers and mainqueue */ + spinlock_t irqlock; /* protects irqqueue */ + + struct list_head mainqueue; + struct list_head irqqueue; +}; + +struct uvc_video_device { + struct uvc_device *dev; + struct video_device *vdev; + atomic_t active; + unsigned int frozen : 1; + + struct list_head iterms; + struct uvc_entity *oterm; + struct uvc_entity *processing; + struct uvc_entity *selector; + struct list_head extensions; + struct mutex ctrl_mutex; + + struct uvc_video_queue queue; + + /* Video streaming object, must always be non-NULL. */ + struct uvc_streaming *streaming; + + void (*decode) (struct urb *urb, struct uvc_video_device *video, + struct uvc_buffer *buf); + + /* Context data used by the bulk completion handler. */ + struct { + __u8 header[256]; + unsigned int header_size; + int skip_payload; + __u32 payload_size; + __u32 max_payload_size; + } bulk; + + struct urb *urb[UVC_URBS]; + char *urb_buffer[UVC_URBS]; + + __u8 last_fid; +}; + +enum uvc_device_state { + UVC_DEV_DISCONNECTED = 1, +}; + +struct uvc_device { + struct usb_device *udev; + struct usb_interface *intf; + __u32 quirks; + int intfnum; + char name[32]; + + enum uvc_device_state state; + struct kref kref; + struct list_head list; + + /* Video control interface */ + __u16 uvc_version; + __u32 clock_frequency; + + struct list_head entities; + + struct uvc_video_device video; + + /* Status Interrupt Endpoint */ + struct usb_host_endpoint *int_ep; + struct urb *int_urb; + __u8 status[16]; + struct input_dev *input; + + /* Video Streaming interfaces */ + struct list_head streaming; +}; + +enum uvc_handle_state { + UVC_HANDLE_PASSIVE = 0, + UVC_HANDLE_ACTIVE = 1, +}; + +struct uvc_fh { + struct uvc_video_device *device; + enum uvc_handle_state state; +}; + +struct uvc_driver { + struct usb_driver driver; + + struct mutex open_mutex; /* protects from open/disconnect race */ + + struct list_head devices; /* struct uvc_device list */ + struct list_head controls; /* struct uvc_control_info list */ + struct mutex ctrl_mutex; /* protects controls and devices + lists */ +}; + +/* ------------------------------------------------------------------------ + * Debugging, printing and logging + */ + +#define UVC_TRACE_PROBE (1 << 0) +#define UVC_TRACE_DESCR (1 << 1) +#define UVC_TRACE_CONTROL (1 << 2) +#define UVC_TRACE_FORMAT (1 << 3) +#define UVC_TRACE_CAPTURE (1 << 4) +#define UVC_TRACE_CALLS (1 << 5) +#define UVC_TRACE_IOCTL (1 << 6) +#define UVC_TRACE_FRAME (1 << 7) +#define UVC_TRACE_SUSPEND (1 << 8) +#define UVC_TRACE_STATUS (1 << 9) + +extern unsigned int uvc_trace_param; + +#define uvc_trace(flag, msg...) \ + do { \ + if (uvc_trace_param & flag) \ + printk(KERN_DEBUG "uvcvideo: " msg); \ + } while (0) + +#define uvc_printk(level, msg...) \ + printk(level "uvcvideo: " msg) + +#define UVC_GUID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \ + "%02x%02x%02x%02x%02x%02x" +#define UVC_GUID_ARGS(guid) \ + (guid)[3], (guid)[2], (guid)[1], (guid)[0], \ + (guid)[5], (guid)[4], \ + (guid)[7], (guid)[6], \ + (guid)[8], (guid)[9], \ + (guid)[10], (guid)[11], (guid)[12], \ + (guid)[13], (guid)[14], (guid)[15] + +/* -------------------------------------------------------------------------- + * Internal functions. + */ + +/* Core driver */ +extern struct uvc_driver uvc_driver; +extern void uvc_delete(struct kref *kref); + +/* Video buffers queue management. */ +extern void uvc_queue_init(struct uvc_video_queue *queue); +extern int uvc_alloc_buffers(struct uvc_video_queue *queue, + unsigned int nbuffers, unsigned int buflength); +extern int uvc_free_buffers(struct uvc_video_queue *queue); +extern int uvc_query_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf); +extern int uvc_queue_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf); +extern int uvc_dequeue_buffer(struct uvc_video_queue *queue, + struct v4l2_buffer *v4l2_buf, int nonblocking); +extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); +extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); +extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, + struct uvc_buffer *buf); +extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, + struct file *file, poll_table *wait); +static inline int uvc_queue_streaming(struct uvc_video_queue *queue) +{ + return queue->flags & UVC_QUEUE_STREAMING; +} + +/* V4L2 interface */ +extern struct file_operations uvc_fops; + +/* Video */ +extern int uvc_video_init(struct uvc_video_device *video); +extern int uvc_video_suspend(struct uvc_video_device *video); +extern int uvc_video_resume(struct uvc_video_device *video); +extern int uvc_video_enable(struct uvc_video_device *video, int enable); +extern int uvc_probe_video(struct uvc_video_device *video, + struct uvc_streaming_control *probe); +extern int uvc_query_ctrl(struct uvc_device *dev, __u8 query, __u8 unit, + __u8 intfnum, __u8 cs, void *data, __u16 size); +extern int uvc_set_video_ctrl(struct uvc_video_device *video, + struct uvc_streaming_control *ctrl, int probe); + +/* Status */ +extern int uvc_status_init(struct uvc_device *dev); +extern void uvc_status_cleanup(struct uvc_device *dev); +extern int uvc_status_suspend(struct uvc_device *dev); +extern int uvc_status_resume(struct uvc_device *dev); + +/* Controls */ +extern struct uvc_control *uvc_find_control(struct uvc_video_device *video, + __u32 v4l2_id, struct uvc_control_mapping **mapping); +extern int uvc_query_v4l2_ctrl(struct uvc_video_device *video, + struct v4l2_queryctrl *v4l2_ctrl); + +extern int uvc_ctrl_add_info(struct uvc_control_info *info); +extern int uvc_ctrl_add_mapping(struct uvc_control_mapping *mapping); +extern int uvc_ctrl_init_device(struct uvc_device *dev); +extern void uvc_ctrl_cleanup_device(struct uvc_device *dev); +extern int uvc_ctrl_resume_device(struct uvc_device *dev); +extern void uvc_ctrl_init(void); + +extern int uvc_ctrl_begin(struct uvc_video_device *video); +extern int __uvc_ctrl_commit(struct uvc_video_device *video, int rollback); +static inline int uvc_ctrl_commit(struct uvc_video_device *video) +{ + return __uvc_ctrl_commit(video, 0); +} +static inline int uvc_ctrl_rollback(struct uvc_video_device *video) +{ + return __uvc_ctrl_commit(video, 1); +} + +extern int uvc_ctrl_get(struct uvc_video_device *video, + struct v4l2_ext_control *xctrl); +extern int uvc_ctrl_set(struct uvc_video_device *video, + struct v4l2_ext_control *xctrl); + +extern int uvc_xu_ctrl_query(struct uvc_video_device *video, + struct uvc_xu_control *ctrl, int set); + +/* Utility functions */ +extern void uvc_simplify_fraction(uint32_t *numerator, uint32_t *denominator, + unsigned int n_terms, unsigned int threshold); +extern uint32_t uvc_fraction_to_interval(uint32_t numerator, + uint32_t denominator); +extern struct usb_host_endpoint *uvc_find_endpoint( + struct usb_host_interface *alts, __u8 epaddr); + +/* Quirks support */ +void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video, + struct uvc_buffer *buf); + +#endif /* __KERNEL__ */ + +#endif diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c index 31e8af0ba278..67a661cf5219 100644 --- a/drivers/media/video/videodev.c +++ b/drivers/media/video/videodev.c @@ -51,12 +51,51 @@ #define VIDEO_NUM_DEVICES 256 #define VIDEO_NAME "video4linux" +struct std_descr { + v4l2_std_id std; + const char *descr; +}; + +static const struct std_descr standards[] = { + { V4L2_STD_NTSC, "NTSC" }, + { V4L2_STD_NTSC_M, "NTSC-M" }, + { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, + { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, + { V4L2_STD_NTSC_443, "NTSC-443" }, + { V4L2_STD_PAL, "PAL" }, + { V4L2_STD_PAL_BG, "PAL-BG" }, + { V4L2_STD_PAL_B, "PAL-B" }, + { V4L2_STD_PAL_B1, "PAL-B1" }, + { V4L2_STD_PAL_G, "PAL-G" }, + { V4L2_STD_PAL_H, "PAL-H" }, + { V4L2_STD_PAL_I, "PAL-I" }, + { V4L2_STD_PAL_DK, "PAL-DK" }, + { V4L2_STD_PAL_D, "PAL-D" }, + { V4L2_STD_PAL_D1, "PAL-D1" }, + { V4L2_STD_PAL_K, "PAL-K" }, + { V4L2_STD_PAL_M, "PAL-M" }, + { V4L2_STD_PAL_N, "PAL-N" }, + { V4L2_STD_PAL_Nc, "PAL-Nc" }, + { V4L2_STD_PAL_60, "PAL-60" }, + { V4L2_STD_SECAM, "SECAM" }, + { V4L2_STD_SECAM_B, "SECAM-B" }, + { V4L2_STD_SECAM_G, "SECAM-G" }, + { V4L2_STD_SECAM_H, "SECAM-H" }, + { V4L2_STD_SECAM_DK, "SECAM-DK" }, + { V4L2_STD_SECAM_D, "SECAM-D" }, + { V4L2_STD_SECAM_K, "SECAM-K" }, + { V4L2_STD_SECAM_K1, "SECAM-K1" }, + { V4L2_STD_SECAM_L, "SECAM-L" }, + { V4L2_STD_SECAM_LC, "SECAM-Lc" }, + { 0, "Unknown" } +}; + /* video4linux standard ID conversion to standard name */ -char *v4l2_norm_to_name(v4l2_std_id id) +const char *v4l2_norm_to_name(v4l2_std_id id) { - char *name; u32 myid = id; + int i; /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 64 bit comparations. So, on that architecture, with some gcc @@ -64,110 +103,17 @@ char *v4l2_norm_to_name(v4l2_std_id id) */ BUG_ON(myid != id); - switch (myid) { - case V4L2_STD_PAL: - name = "PAL"; - break; - case V4L2_STD_PAL_BG: - name = "PAL-BG"; - break; - case V4L2_STD_PAL_DK: - name = "PAL-DK"; - break; - case V4L2_STD_PAL_B: - name = "PAL-B"; - break; - case V4L2_STD_PAL_B1: - name = "PAL-B1"; - break; - case V4L2_STD_PAL_G: - name = "PAL-G"; - break; - case V4L2_STD_PAL_H: - name = "PAL-H"; - break; - case V4L2_STD_PAL_I: - name = "PAL-I"; - break; - case V4L2_STD_PAL_D: - name = "PAL-D"; - break; - case V4L2_STD_PAL_D1: - name = "PAL-D1"; - break; - case V4L2_STD_PAL_K: - name = "PAL-K"; - break; - case V4L2_STD_PAL_M: - name = "PAL-M"; - break; - case V4L2_STD_PAL_N: - name = "PAL-N"; - break; - case V4L2_STD_PAL_Nc: - name = "PAL-Nc"; - break; - case V4L2_STD_PAL_60: - name = "PAL-60"; - break; - case V4L2_STD_NTSC: - name = "NTSC"; - break; - case V4L2_STD_NTSC_M: - name = "NTSC-M"; - break; - case V4L2_STD_NTSC_M_JP: - name = "NTSC-M-JP"; - break; - case V4L2_STD_NTSC_443: - name = "NTSC-443"; - break; - case V4L2_STD_NTSC_M_KR: - name = "NTSC-M-KR"; - break; - case V4L2_STD_SECAM: - name = "SECAM"; - break; - case V4L2_STD_SECAM_DK: - name = "SECAM-DK"; - break; - case V4L2_STD_SECAM_B: - name = "SECAM-B"; - break; - case V4L2_STD_SECAM_D: - name = "SECAM-D"; - break; - case V4L2_STD_SECAM_G: - name = "SECAM-G"; - break; - case V4L2_STD_SECAM_H: - name = "SECAM-H"; - break; - case V4L2_STD_SECAM_K: - name = "SECAM-K"; - break; - case V4L2_STD_SECAM_K1: - name = "SECAM-K1"; - break; - case V4L2_STD_SECAM_L: - name = "SECAM-L"; - break; - case V4L2_STD_SECAM_LC: - name = "SECAM-LC"; - break; - default: - name = "Unknown"; - break; - } - - return name; + for (i = 0; standards[i].std; i++) + if (myid == standards[i].std) + break; + return standards[i].descr; } EXPORT_SYMBOL(v4l2_norm_to_name); /* Fill in the fields of a v4l2_standard structure according to the 'id' and 'transmission' parameters. Returns negative on error. */ int v4l2_video_std_construct(struct v4l2_standard *vs, - int id, char *name) + int id, const char *name) { u32 index = vs->index; @@ -1218,95 +1164,40 @@ static int __video_do_ioctl(struct inode *inode, struct file *file, case VIDIOC_ENUMSTD: { struct v4l2_standard *p = arg; - v4l2_std_id id = vfd->tvnorms,curr_id=0; - unsigned int index = p->index,i; - - if (index<0) { - ret=-EINVAL; - break; - } - - /* Return norm array on a canonical way */ - for (i=0;i<= index && id; i++) { - if ( (id & V4L2_STD_PAL) == V4L2_STD_PAL) { - curr_id = V4L2_STD_PAL; - } else if ( (id & V4L2_STD_PAL_BG) == V4L2_STD_PAL_BG) { - curr_id = V4L2_STD_PAL_BG; - } else if ( (id & V4L2_STD_PAL_DK) == V4L2_STD_PAL_DK) { - curr_id = V4L2_STD_PAL_DK; - } else if ( (id & V4L2_STD_PAL_B) == V4L2_STD_PAL_B) { - curr_id = V4L2_STD_PAL_B; - } else if ( (id & V4L2_STD_PAL_B1) == V4L2_STD_PAL_B1) { - curr_id = V4L2_STD_PAL_B1; - } else if ( (id & V4L2_STD_PAL_G) == V4L2_STD_PAL_G) { - curr_id = V4L2_STD_PAL_G; - } else if ( (id & V4L2_STD_PAL_H) == V4L2_STD_PAL_H) { - curr_id = V4L2_STD_PAL_H; - } else if ( (id & V4L2_STD_PAL_I) == V4L2_STD_PAL_I) { - curr_id = V4L2_STD_PAL_I; - } else if ( (id & V4L2_STD_PAL_D) == V4L2_STD_PAL_D) { - curr_id = V4L2_STD_PAL_D; - } else if ( (id & V4L2_STD_PAL_D1) == V4L2_STD_PAL_D1) { - curr_id = V4L2_STD_PAL_D1; - } else if ( (id & V4L2_STD_PAL_K) == V4L2_STD_PAL_K) { - curr_id = V4L2_STD_PAL_K; - } else if ( (id & V4L2_STD_PAL_M) == V4L2_STD_PAL_M) { - curr_id = V4L2_STD_PAL_M; - } else if ( (id & V4L2_STD_PAL_N) == V4L2_STD_PAL_N) { - curr_id = V4L2_STD_PAL_N; - } else if ( (id & V4L2_STD_PAL_Nc) == V4L2_STD_PAL_Nc) { - curr_id = V4L2_STD_PAL_Nc; - } else if ( (id & V4L2_STD_PAL_60) == V4L2_STD_PAL_60) { - curr_id = V4L2_STD_PAL_60; - } else if ( (id & V4L2_STD_NTSC) == V4L2_STD_NTSC) { - curr_id = V4L2_STD_NTSC; - } else if ( (id & V4L2_STD_NTSC_M) == V4L2_STD_NTSC_M) { - curr_id = V4L2_STD_NTSC_M; - } else if ( (id & V4L2_STD_NTSC_M_JP) == V4L2_STD_NTSC_M_JP) { - curr_id = V4L2_STD_NTSC_M_JP; - } else if ( (id & V4L2_STD_NTSC_443) == V4L2_STD_NTSC_443) { - curr_id = V4L2_STD_NTSC_443; - } else if ( (id & V4L2_STD_NTSC_M_KR) == V4L2_STD_NTSC_M_KR) { - curr_id = V4L2_STD_NTSC_M_KR; - } else if ( (id & V4L2_STD_SECAM) == V4L2_STD_SECAM) { - curr_id = V4L2_STD_SECAM; - } else if ( (id & V4L2_STD_SECAM_DK) == V4L2_STD_SECAM_DK) { - curr_id = V4L2_STD_SECAM_DK; - } else if ( (id & V4L2_STD_SECAM_B) == V4L2_STD_SECAM_B) { - curr_id = V4L2_STD_SECAM_B; - } else if ( (id & V4L2_STD_SECAM_D) == V4L2_STD_SECAM_D) { - curr_id = V4L2_STD_SECAM_D; - } else if ( (id & V4L2_STD_SECAM_G) == V4L2_STD_SECAM_G) { - curr_id = V4L2_STD_SECAM_G; - } else if ( (id & V4L2_STD_SECAM_H) == V4L2_STD_SECAM_H) { - curr_id = V4L2_STD_SECAM_H; - } else if ( (id & V4L2_STD_SECAM_K) == V4L2_STD_SECAM_K) { - curr_id = V4L2_STD_SECAM_K; - } else if ( (id & V4L2_STD_SECAM_K1) == V4L2_STD_SECAM_K1) { - curr_id = V4L2_STD_SECAM_K1; - } else if ( (id & V4L2_STD_SECAM_L) == V4L2_STD_SECAM_L) { - curr_id = V4L2_STD_SECAM_L; - } else if ( (id & V4L2_STD_SECAM_LC) == V4L2_STD_SECAM_LC) { - curr_id = V4L2_STD_SECAM_LC; - } else { + v4l2_std_id id = vfd->tvnorms, curr_id = 0; + unsigned int index = p->index, i, j = 0; + const char *descr = ""; + + /* Return norm array in a canonical way */ + for (i = 0; i <= index && id; i++) { + /* last std value in the standards array is 0, so this + while always ends there since (id & 0) == 0. */ + while ((id & standards[j].std) != standards[j].std) + j++; + curr_id = standards[j].std; + descr = standards[j].descr; + j++; + if (curr_id == 0) break; - } - id &= ~curr_id; + if (curr_id != V4L2_STD_PAL && + curr_id != V4L2_STD_SECAM && + curr_id != V4L2_STD_NTSC) + id &= ~curr_id; } - if (i<=index) + if (i <= index) return -EINVAL; - v4l2_video_std_construct(p, curr_id,v4l2_norm_to_name(curr_id)); + v4l2_video_std_construct(p, curr_id, descr); p->index = index; - dbgarg (cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, " + dbgarg(cmd, "index=%d, id=%Ld, name=%s, fps=%d/%d, " "framelines=%d\n", p->index, (unsigned long long)p->id, p->name, p->frameperiod.numerator, p->frameperiod.denominator, p->framelines); - ret=0; + ret = 0; break; } case VIDIOC_G_STD: diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c index 845be1864f68..5ff9a58b6135 100644 --- a/drivers/media/video/vivi.c +++ b/drivers/media/video/vivi.c @@ -327,13 +327,14 @@ static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf) int hmax = buf->vb.height; int wmax = buf->vb.width; struct timeval ts; - char *tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC); + char *tmpbuf; void *vbuf = videobuf_to_vmalloc(&buf->vb); - if (!tmpbuf) + if (!vbuf) return; - if (!vbuf) + tmpbuf = kmalloc(wmax * 2, GFP_ATOMIC); + if (!tmpbuf) return; for (h = 0; h < hmax; h++) { |
