diff options
Diffstat (limited to 'drivers/i2c/chips/isp1301_omap.c')
| -rw-r--r-- | drivers/i2c/chips/isp1301_omap.c | 1683 |
1 files changed, 0 insertions, 1683 deletions
diff --git a/drivers/i2c/chips/isp1301_omap.c b/drivers/i2c/chips/isp1301_omap.c deleted file mode 100644 index e0d56ef2bcb0..000000000000 --- a/drivers/i2c/chips/isp1301_omap.c +++ /dev/null @@ -1,1683 +0,0 @@ -/* - * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller - * - * Copyright (C) 2004 Texas Instruments - * Copyright (C) 2004 David Brownell - * - * 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 program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/gpio.h> -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> -#include <linux/usb.h> -#include <linux/usb/otg.h> -#include <linux/i2c.h> -#include <linux/workqueue.h> - -#include <asm/irq.h> -#include <asm/mach-types.h> - -#include <mach/usb.h> -#include <mach/mux.h> - - -#ifndef DEBUG -#undef VERBOSE -#endif - - -#define DRIVER_VERSION "24 August 2004" -#define DRIVER_NAME (isp1301_driver.driver.name) - -MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver"); -MODULE_LICENSE("GPL"); - -struct isp1301 { - struct otg_transceiver otg; - struct i2c_client *client; - void (*i2c_release)(struct device *dev); - - int irq_type; - - u32 last_otg_ctrl; - unsigned working:1; - - struct timer_list timer; - - /* use keventd context to change the state for us */ - struct work_struct work; - - unsigned long todo; -# define WORK_UPDATE_ISP 0 /* update ISP from OTG */ -# define WORK_UPDATE_OTG 1 /* update OTG from ISP */ -# define WORK_HOST_RESUME 4 /* resume host */ -# define WORK_TIMER 6 /* timer fired */ -# define WORK_STOP 7 /* don't resubmit */ -}; - - -/* bits in OTG_CTRL */ - -#define OTG_XCEIV_OUTPUTS \ - (OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID) -#define OTG_XCEIV_INPUTS \ - (OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID) -#define OTG_CTRL_BITS \ - (OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP) - /* and OTG_PULLUP is sometimes written */ - -#define OTG_CTRL_MASK (OTG_DRIVER_SEL| \ - OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \ - OTG_CTRL_BITS) - - -/*-------------------------------------------------------------------------*/ - -/* board-specific PM hooks */ - -#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3) - -#if defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE) - -#include <linux/i2c/tps65010.h> - -#else - -static inline int tps65010_set_vbus_draw(unsigned mA) -{ - pr_debug("tps65010: draw %d mA (STUB)\n", mA); - return 0; -} - -#endif - -static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) -{ - int status = tps65010_set_vbus_draw(mA); - if (status < 0) - pr_debug(" VBUS %d mA error %d\n", mA, status); -} - -static void enable_vbus_source(struct isp1301 *isp) -{ - /* this board won't supply more than 8mA vbus power. - * some boards can switch a 100ma "unit load" (or more). - */ -} - - -/* products will deliver OTG messages with LEDs, GUI, etc */ -static inline void notresponding(struct isp1301 *isp) -{ - printk(KERN_NOTICE "OTG device not responding.\n"); -} - - -#endif - -#if defined(CONFIG_MACH_OMAP_H4) - -static void enable_vbus_draw(struct isp1301 *isp, unsigned mA) -{ - /* H4 controls this by DIP switch S2.4; no soft control. - * ON means the charger is always enabled. Leave it OFF - * unless the OTG port is used only in B-peripheral mode. - */ -} - -static void enable_vbus_source(struct isp1301 *isp) -{ - /* this board won't supply more than 8mA vbus power. - * some boards can switch a 100ma "unit load" (or more). - */ -} - - -/* products will deliver OTG messages with LEDs, GUI, etc */ -static inline void notresponding(struct isp1301 *isp) -{ - printk(KERN_NOTICE "OTG device not responding.\n"); -} - - -#endif - -/*-------------------------------------------------------------------------*/ - -static struct i2c_driver isp1301_driver; - -/* smbus apis are used for portability */ - -static inline u8 -isp1301_get_u8(struct isp1301 *isp, u8 reg) -{ - return i2c_smbus_read_byte_data(isp->client, reg + 0); -} - -static inline int -isp1301_get_u16(struct isp1301 *isp, u8 reg) -{ - return i2c_smbus_read_word_data(isp->client, reg); -} - -static inline int -isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits) -{ - return i2c_smbus_write_byte_data(isp->client, reg + 0, bits); -} - -static inline int -isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits) -{ - return i2c_smbus_write_byte_data(isp->client, reg + 1, bits); -} - -/*-------------------------------------------------------------------------*/ - -/* identification */ -#define ISP1301_VENDOR_ID 0x00 /* u16 read */ -#define ISP1301_PRODUCT_ID 0x02 /* u16 read */ -#define ISP1301_BCD_DEVICE 0x14 /* u16 read */ - -#define I2C_VENDOR_ID_PHILIPS 0x04cc -#define I2C_PRODUCT_ID_PHILIPS_1301 0x1301 - -/* operational registers */ -#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */ -# define MC1_SPEED (1 << 0) -# define MC1_SUSPEND (1 << 1) -# define MC1_DAT_SE0 (1 << 2) -# define MC1_TRANSPARENT (1 << 3) -# define MC1_BDIS_ACON_EN (1 << 4) -# define MC1_OE_INT_EN (1 << 5) -# define MC1_UART_EN (1 << 6) -# define MC1_MASK 0x7f -#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */ -# define MC2_GLOBAL_PWR_DN (1 << 0) -# define MC2_SPD_SUSP_CTRL (1 << 1) -# define MC2_BI_DI (1 << 2) -# define MC2_TRANSP_BDIR0 (1 << 3) -# define MC2_TRANSP_BDIR1 (1 << 4) -# define MC2_AUDIO_EN (1 << 5) -# define MC2_PSW_EN (1 << 6) -# define MC2_EN2V7 (1 << 7) -#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */ -# define OTG1_DP_PULLUP (1 << 0) -# define OTG1_DM_PULLUP (1 << 1) -# define OTG1_DP_PULLDOWN (1 << 2) -# define OTG1_DM_PULLDOWN (1 << 3) -# define OTG1_ID_PULLDOWN (1 << 4) -# define OTG1_VBUS_DRV (1 << 5) -# define OTG1_VBUS_DISCHRG (1 << 6) -# define OTG1_VBUS_CHRG (1 << 7) -#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */ -# define OTG_B_SESS_END (1 << 6) -# define OTG_B_SESS_VLD (1 << 7) - -#define ISP1301_INTERRUPT_SOURCE 0x08 /* u8 read */ -#define ISP1301_INTERRUPT_LATCH 0x0A /* u8 read, set, +1 clear */ - -#define ISP1301_INTERRUPT_FALLING 0x0C /* u8 read, set, +1 clear */ -#define ISP1301_INTERRUPT_RISING 0x0E /* u8 read, set, +1 clear */ - -/* same bitfields in all interrupt registers */ -# define INTR_VBUS_VLD (1 << 0) -# define INTR_SESS_VLD (1 << 1) -# define INTR_DP_HI (1 << 2) -# define INTR_ID_GND (1 << 3) -# define INTR_DM_HI (1 << 4) -# define INTR_ID_FLOAT (1 << 5) -# define INTR_BDIS_ACON (1 << 6) -# define INTR_CR_INT (1 << 7) - -/*-------------------------------------------------------------------------*/ - -static const char *state_string(enum usb_otg_state state) -{ - switch (state) { - case OTG_STATE_A_IDLE: return "a_idle"; - case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise"; - case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon"; - case OTG_STATE_A_HOST: return "a_host"; - case OTG_STATE_A_SUSPEND: return "a_suspend"; - case OTG_STATE_A_PERIPHERAL: return "a_peripheral"; - case OTG_STATE_A_WAIT_VFALL: return "a_wait_vfall"; - case OTG_STATE_A_VBUS_ERR: return "a_vbus_err"; - case OTG_STATE_B_IDLE: return "b_idle"; - case OTG_STATE_B_SRP_INIT: return "b_srp_init"; - case OTG_STATE_B_PERIPHERAL: return "b_peripheral"; - case OTG_STATE_B_WAIT_ACON: return "b_wait_acon"; - case OTG_STATE_B_HOST: return "b_host"; - default: return "UNDEFINED"; - } -} - -static inline const char *state_name(struct isp1301 *isp) -{ - return state_string(isp->otg.state); -} - -/*-------------------------------------------------------------------------*/ - -/* NOTE: some of this ISP1301 setup is specific to H2 boards; - * not everything is guarded by board-specific checks, or even using - * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI. - * - * ALSO: this currently doesn't use ISP1301 low-power modes - * while OTG is running. - */ - -static void power_down(struct isp1301 *isp) -{ - isp->otg.state = OTG_STATE_UNDEFINED; - - // isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); - - isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN); - isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); -} - -static void power_up(struct isp1301 *isp) -{ - // isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); - isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND); - - /* do this only when cpu is driving transceiver, - * so host won't see a low speed device... - */ - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); -} - -#define NO_HOST_SUSPEND - -static int host_suspend(struct isp1301 *isp) -{ -#ifdef NO_HOST_SUSPEND - return 0; -#else - struct device *dev; - - if (!isp->otg.host) - return -ENODEV; - - /* Currently ASSUMES only the OTG port matters; - * other ports could be active... - */ - dev = isp->otg.host->controller; - return dev->driver->suspend(dev, 3, 0); -#endif -} - -static int host_resume(struct isp1301 *isp) -{ -#ifdef NO_HOST_SUSPEND - return 0; -#else - struct device *dev; - - if (!isp->otg.host) - return -ENODEV; - - dev = isp->otg.host->controller; - return dev->driver->resume(dev, 0); -#endif -} - -static int gadget_suspend(struct isp1301 *isp) -{ - isp->otg.gadget->b_hnp_enable = 0; - isp->otg.gadget->a_hnp_support = 0; - isp->otg.gadget->a_alt_hnp_support = 0; - return usb_gadget_vbus_disconnect(isp->otg.gadget); -} - -/*-------------------------------------------------------------------------*/ - -#define TIMER_MINUTES 10 -#define TIMER_JIFFIES (TIMER_MINUTES * 60 * HZ) - -/* Almost all our I2C messaging comes from a work queue's task context. - * NOTE: guaranteeing certain response times might mean we shouldn't - * share keventd's work queue; a realtime task might be safest. - */ -static void isp1301_defer_work(struct isp1301 *isp, int work) -{ - int status; - - if (isp && !test_and_set_bit(work, &isp->todo)) { - (void) get_device(&isp->client->dev); - status = schedule_work(&isp->work); - if (!status && !isp->working) - dev_vdbg(&isp->client->dev, - "work item %d may be lost\n", work); - } -} - -/* called from irq handlers */ -static void a_idle(struct isp1301 *isp, const char *tag) -{ - u32 l; - - if (isp->otg.state == OTG_STATE_A_IDLE) - return; - - isp->otg.default_a = 1; - if (isp->otg.host) { - isp->otg.host->is_b_host = 0; - host_suspend(isp); - } - if (isp->otg.gadget) { - isp->otg.gadget->is_a_peripheral = 1; - gadget_suspend(isp); - } - isp->otg.state = OTG_STATE_A_IDLE; - l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; - omap_writel(l, OTG_CTRL); - isp->last_otg_ctrl = l; - pr_debug(" --> %s/%s\n", state_name(isp), tag); -} - -/* called from irq handlers */ -static void b_idle(struct isp1301 *isp, const char *tag) -{ - u32 l; - - if (isp->otg.state == OTG_STATE_B_IDLE) - return; - - isp->otg.default_a = 0; - if (isp->otg.host) { - isp->otg.host->is_b_host = 1; - host_suspend(isp); - } - if (isp->otg.gadget) { - isp->otg.gadget->is_a_peripheral = 0; - gadget_suspend(isp); - } - isp->otg.state = OTG_STATE_B_IDLE; - l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; - omap_writel(l, OTG_CTRL); - isp->last_otg_ctrl = l; - pr_debug(" --> %s/%s\n", state_name(isp), tag); -} - -static void -dump_regs(struct isp1301 *isp, const char *label) -{ -#ifdef DEBUG - u8 ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1); - u8 status = isp1301_get_u8(isp, ISP1301_OTG_STATUS); - u8 src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); - - pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n", - omap_readl(OTG_CTRL), label, state_name(isp), - ctrl, status, src); - /* mode control and irq enables don't change much */ -#endif -} - -/*-------------------------------------------------------------------------*/ - -#ifdef CONFIG_USB_OTG - -/* - * The OMAP OTG controller handles most of the OTG state transitions. - * - * We translate isp1301 outputs (mostly voltage comparator status) into - * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state - * flags into isp1301 inputs ... and infer state transitions. - */ - -#ifdef VERBOSE - -static void check_state(struct isp1301 *isp, const char *tag) -{ - enum usb_otg_state state = OTG_STATE_UNDEFINED; - u8 fsm = omap_readw(OTG_TEST) & 0x0ff; - unsigned extra = 0; - - switch (fsm) { - - /* default-b */ - case 0x0: - state = OTG_STATE_B_IDLE; - break; - case 0x3: - case 0x7: - extra = 1; - case 0x1: - state = OTG_STATE_B_PERIPHERAL; - break; - case 0x11: - state = OTG_STATE_B_SRP_INIT; - break; - - /* extra dual-role default-b states */ - case 0x12: - case 0x13: - case 0x16: - extra = 1; - case 0x17: - state = OTG_STATE_B_WAIT_ACON; - break; - case 0x34: - state = OTG_STATE_B_HOST; - break; - - /* default-a */ - case 0x36: - state = OTG_STATE_A_IDLE; - break; - case 0x3c: - state = OTG_STATE_A_WAIT_VFALL; - break; - case 0x7d: - state = OTG_STATE_A_VBUS_ERR; - break; - case 0x9e: - case 0x9f: - extra = 1; - case 0x89: - state = OTG_STATE_A_PERIPHERAL; - break; - case 0xb7: - state = OTG_STATE_A_WAIT_VRISE; - break; - case 0xb8: - state = OTG_STATE_A_WAIT_BCON; - break; - case 0xb9: - state = OTG_STATE_A_HOST; - break; - case 0xba: - state = OTG_STATE_A_SUSPEND; - break; - default: - break; - } - if (isp->otg.state == state && !extra) - return; - pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag, - state_string(state), fsm, state_name(isp), - omap_readl(OTG_CTRL)); -} - -#else - -static inline void check_state(struct isp1301 *isp, const char *tag) { } - -#endif - -/* outputs from ISP1301_INTERRUPT_SOURCE */ -static void update_otg1(struct isp1301 *isp, u8 int_src) -{ - u32 otg_ctrl; - - otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; - otg_ctrl &= ~OTG_XCEIV_INPUTS; - otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD); - - if (int_src & INTR_SESS_VLD) - otg_ctrl |= OTG_ASESSVLD; - else if (isp->otg.state == OTG_STATE_A_WAIT_VFALL) { - a_idle(isp, "vfall"); - otg_ctrl &= ~OTG_CTRL_BITS; - } - if (int_src & INTR_VBUS_VLD) - otg_ctrl |= OTG_VBUSVLD; - if (int_src & INTR_ID_GND) { /* default-A */ - if (isp->otg.state == OTG_STATE_B_IDLE - || isp->otg.state == OTG_STATE_UNDEFINED) { - a_idle(isp, "init"); - return; - } - } else { /* default-B */ - otg_ctrl |= OTG_ID; - if (isp->otg.state == OTG_STATE_A_IDLE - || isp->otg.state == OTG_STATE_UNDEFINED) { - b_idle(isp, "init"); - return; - } - } - omap_writel(otg_ctrl, OTG_CTRL); -} - -/* outputs from ISP1301_OTG_STATUS */ -static void update_otg2(struct isp1301 *isp, u8 otg_status) -{ - u32 otg_ctrl; - - otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; - otg_ctrl &= ~OTG_XCEIV_INPUTS; - otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND); - if (otg_status & OTG_B_SESS_VLD) - otg_ctrl |= OTG_BSESSVLD; - else if (otg_status & OTG_B_SESS_END) - otg_ctrl |= OTG_BSESSEND; - omap_writel(otg_ctrl, OTG_CTRL); -} - -/* inputs going to ISP1301 */ -static void otg_update_isp(struct isp1301 *isp) -{ - u32 otg_ctrl, otg_change; - u8 set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP; - - otg_ctrl = omap_readl(OTG_CTRL); - otg_change = otg_ctrl ^ isp->last_otg_ctrl; - isp->last_otg_ctrl = otg_ctrl; - otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS; - - switch (isp->otg.state) { - case OTG_STATE_B_IDLE: - case OTG_STATE_B_PERIPHERAL: - case OTG_STATE_B_SRP_INIT: - if (!(otg_ctrl & OTG_PULLUP)) { - // if (otg_ctrl & OTG_B_HNPEN) { - if (isp->otg.gadget->b_hnp_enable) { - isp->otg.state = OTG_STATE_B_WAIT_ACON; - pr_debug(" --> b_wait_acon\n"); - } - goto pulldown; - } -pullup: - set |= OTG1_DP_PULLUP; - clr |= OTG1_DP_PULLDOWN; - break; - case OTG_STATE_A_SUSPEND: - case OTG_STATE_A_PERIPHERAL: - if (otg_ctrl & OTG_PULLUP) - goto pullup; - /* FALLTHROUGH */ - // case OTG_STATE_B_WAIT_ACON: - default: -pulldown: - set |= OTG1_DP_PULLDOWN; - clr |= OTG1_DP_PULLUP; - break; - } - -# define toggle(OTG,ISP) do { \ - if (otg_ctrl & OTG) set |= ISP; \ - else clr |= ISP; \ - } while (0) - - if (!(isp->otg.host)) - otg_ctrl &= ~OTG_DRV_VBUS; - - switch (isp->otg.state) { - case OTG_STATE_A_SUSPEND: - if (otg_ctrl & OTG_DRV_VBUS) { - set |= OTG1_VBUS_DRV; - break; - } - /* HNP failed for some reason (A_AIDL_BDIS timeout) */ - notresponding(isp); - - /* FALLTHROUGH */ - case OTG_STATE_A_VBUS_ERR: - isp->otg.state = OTG_STATE_A_WAIT_VFALL; - pr_debug(" --> a_wait_vfall\n"); - /* FALLTHROUGH */ - case OTG_STATE_A_WAIT_VFALL: - /* FIXME usbcore thinks port power is still on ... */ - clr |= OTG1_VBUS_DRV; - break; - case OTG_STATE_A_IDLE: - if (otg_ctrl & OTG_DRV_VBUS) { - isp->otg.state = OTG_STATE_A_WAIT_VRISE; - pr_debug(" --> a_wait_vrise\n"); - } - /* FALLTHROUGH */ - default: - toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV); - } - - toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG); - toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG); - -# undef toggle - - isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set); - isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr); - - /* HNP switch to host or peripheral; and SRP */ - if (otg_change & OTG_PULLUP) { - u32 l; - - switch (isp->otg.state) { - case OTG_STATE_B_IDLE: - if (clr & OTG1_DP_PULLUP) - break; - isp->otg.state = OTG_STATE_B_PERIPHERAL; - pr_debug(" --> b_peripheral\n"); - break; - case OTG_STATE_A_SUSPEND: - if (clr & OTG1_DP_PULLUP) - break; - isp->otg.state = OTG_STATE_A_PERIPHERAL; - pr_debug(" --> a_peripheral\n"); - break; - default: - break; - } - l = omap_readl(OTG_CTRL); - l |= OTG_PULLUP; - omap_writel(l, OTG_CTRL); - } - - check_state(isp, __func__); - dump_regs(isp, "otg->isp1301"); -} - -static irqreturn_t omap_otg_irq(int irq, void *_isp) -{ - u16 otg_irq = omap_readw(OTG_IRQ_SRC); - u32 otg_ctrl; - int ret = IRQ_NONE; - struct isp1301 *isp = _isp; - - /* update ISP1301 transciever from OTG controller */ - if (otg_irq & OPRT_CHG) { - omap_writew(OPRT_CHG, OTG_IRQ_SRC); - isp1301_defer_work(isp, WORK_UPDATE_ISP); - ret = IRQ_HANDLED; - - /* SRP to become b_peripheral failed */ - } else if (otg_irq & B_SRP_TMROUT) { - pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL)); - notresponding(isp); - - /* gadget drivers that care should monitor all kinds of - * remote wakeup (SRP, normal) using their own timer - * to give "check cable and A-device" messages. - */ - if (isp->otg.state == OTG_STATE_B_SRP_INIT) - b_idle(isp, "srp_timeout"); - - omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - /* HNP to become b_host failed */ - } else if (otg_irq & B_HNP_FAIL) { - pr_debug("otg: %s B_HNP_FAIL, %06x\n", - state_name(isp), omap_readl(OTG_CTRL)); - notresponding(isp); - - otg_ctrl = omap_readl(OTG_CTRL); - otg_ctrl |= OTG_BUSDROP; - otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; - omap_writel(otg_ctrl, OTG_CTRL); - - /* subset of b_peripheral()... */ - isp->otg.state = OTG_STATE_B_PERIPHERAL; - pr_debug(" --> b_peripheral\n"); - - omap_writew(B_HNP_FAIL, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - /* detect SRP from B-device ... */ - } else if (otg_irq & A_SRP_DETECT) { - pr_debug("otg: %s SRP_DETECT, %06x\n", - state_name(isp), omap_readl(OTG_CTRL)); - - isp1301_defer_work(isp, WORK_UPDATE_OTG); - switch (isp->otg.state) { - case OTG_STATE_A_IDLE: - if (!isp->otg.host) - break; - isp1301_defer_work(isp, WORK_HOST_RESUME); - otg_ctrl = omap_readl(OTG_CTRL); - otg_ctrl |= OTG_A_BUSREQ; - otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) - & ~OTG_XCEIV_INPUTS - & OTG_CTRL_MASK; - omap_writel(otg_ctrl, OTG_CTRL); - break; - default: - break; - } - - omap_writew(A_SRP_DETECT, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - /* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise) - * we don't track them separately - */ - } else if (otg_irq & A_REQ_TMROUT) { - otg_ctrl = omap_readl(OTG_CTRL); - pr_info("otg: BCON_TMOUT from %s, %06x\n", - state_name(isp), otg_ctrl); - notresponding(isp); - - otg_ctrl |= OTG_BUSDROP; - otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; - omap_writel(otg_ctrl, OTG_CTRL); - isp->otg.state = OTG_STATE_A_WAIT_VFALL; - - omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - /* A-supplied voltage fell too low; overcurrent */ - } else if (otg_irq & A_VBUS_ERR) { - otg_ctrl = omap_readl(OTG_CTRL); - printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n", - state_name(isp), otg_irq, otg_ctrl); - - otg_ctrl |= OTG_BUSDROP; - otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; - omap_writel(otg_ctrl, OTG_CTRL); - isp->otg.state = OTG_STATE_A_VBUS_ERR; - - omap_writew(A_VBUS_ERR, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - /* switch driver; the transciever code activates it, - * ungating the udc clock or resuming OHCI. - */ - } else if (otg_irq & DRIVER_SWITCH) { - int kick = 0; - - otg_ctrl = omap_readl(OTG_CTRL); - printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n", - state_name(isp), - (otg_ctrl & OTG_DRIVER_SEL) - ? "gadget" : "host", - otg_ctrl); - isp1301_defer_work(isp, WORK_UPDATE_ISP); - - /* role is peripheral */ - if (otg_ctrl & OTG_DRIVER_SEL) { - switch (isp->otg.state) { - case OTG_STATE_A_IDLE: - b_idle(isp, __func__); - break; - default: - break; - } - isp1301_defer_work(isp, WORK_UPDATE_ISP); - - /* role is host */ - } else { - if (!(otg_ctrl & OTG_ID)) { - otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS; - omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL); - } - - if (isp->otg.host) { - switch (isp->otg.state) { - case OTG_STATE_B_WAIT_ACON: - isp->otg.state = OTG_STATE_B_HOST; - pr_debug(" --> b_host\n"); - kick = 1; - break; - case OTG_STATE_A_WAIT_BCON: - isp->otg.state = OTG_STATE_A_HOST; - pr_debug(" --> a_host\n"); - break; - case OTG_STATE_A_PERIPHERAL: - isp->otg.state = OTG_STATE_A_WAIT_BCON; - pr_debug(" --> a_wait_bcon\n"); - break; - default: - break; - } - isp1301_defer_work(isp, WORK_HOST_RESUME); - } - } - - omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC); - ret = IRQ_HANDLED; - - if (kick) - usb_bus_start_enum(isp->otg.host, - isp->otg.host->otg_port); - } - - check_state(isp, __func__); - return ret; -} - -static struct platform_device *otg_dev; - -static int otg_init(struct isp1301 *isp) -{ - u32 l; - - if (!otg_dev) - return -ENODEV; - - dump_regs(isp, __func__); - /* some of these values are board-specific... */ - l = omap_readl(OTG_SYSCON_2); - l |= OTG_EN - /* for B-device: */ - | SRP_GPDATA /* 9msec Bdev D+ pulse */ - | SRP_GPDVBUS /* discharge after VBUS pulse */ - // | (3 << 24) /* 2msec VBUS pulse */ - /* for A-device: */ - | (0 << 20) /* 200ms nominal A_WAIT_VRISE timer */ - | SRP_DPW /* detect 167+ns SRP pulses */ - | SRP_DATA | SRP_VBUS /* accept both kinds of SRP pulse */ - ; - omap_writel(l, OTG_SYSCON_2); - - update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); - update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); - - check_state(isp, __func__); - pr_debug("otg: %s, %s %06x\n", - state_name(isp), __func__, omap_readl(OTG_CTRL)); - - omap_writew(DRIVER_SWITCH | OPRT_CHG - | B_SRP_TMROUT | B_HNP_FAIL - | A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN); - - l = omap_readl(OTG_SYSCON_2); - l |= OTG_EN; - omap_writel(l, OTG_SYSCON_2); - - return 0; -} - -static int otg_probe(struct platform_device *dev) -{ - // struct omap_usb_config *config = dev->platform_data; - - otg_dev = dev; - return 0; -} - -static int otg_remove(struct platform_device *dev) -{ - otg_dev = NULL; - return 0; -} - -static struct platform_driver omap_otg_driver = { - .probe = otg_probe, - .remove = otg_remove, - .driver = { - .owner = THIS_MODULE, - .name = "omap_otg", - }, -}; - -static int otg_bind(struct isp1301 *isp) -{ - int status; - - if (otg_dev) - return -EBUSY; - - status = platform_driver_register(&omap_otg_driver); - if (status < 0) - return status; - - if (otg_dev) - status = request_irq(otg_dev->resource[1].start, omap_otg_irq, - IRQF_DISABLED, DRIVER_NAME, isp); - else - status = -ENODEV; - - if (status < 0) - platform_driver_unregister(&omap_otg_driver); - return status; -} - -static void otg_unbind(struct isp1301 *isp) -{ - if (!otg_dev) - return; - free_irq(otg_dev->resource[1].start, isp); -} - -#else - -/* OTG controller isn't clocked */ - -#endif /* CONFIG_USB_OTG */ - -/*-------------------------------------------------------------------------*/ - -static void b_peripheral(struct isp1301 *isp) -{ - u32 l; - - l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; - omap_writel(l, OTG_CTRL); - - usb_gadget_vbus_connect(isp->otg.gadget); - -#ifdef CONFIG_USB_OTG - enable_vbus_draw(isp, 8); - otg_update_isp(isp); -#else - enable_vbus_draw(isp, 100); - /* UDC driver just set OTG_BSESSVLD */ - isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP); - isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN); - isp->otg.state = OTG_STATE_B_PERIPHERAL; - pr_debug(" --> b_peripheral\n"); - dump_regs(isp, "2periph"); -#endif -} - -static void isp_update_otg(struct isp1301 *isp, u8 stat) -{ - u8 isp_stat, isp_bstat; - enum usb_otg_state state = isp->otg.state; - - if (stat & INTR_BDIS_ACON) - pr_debug("OTG: BDIS_ACON, %s\n", state_name(isp)); - - /* start certain state transitions right away */ - isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE); - if (isp_stat & INTR_ID_GND) { - if (isp->otg.default_a) { - switch (state) { - case OTG_STATE_B_IDLE: - a_idle(isp, "idle"); - /* FALLTHROUGH */ - case OTG_STATE_A_IDLE: - enable_vbus_source(isp); - /* FALLTHROUGH */ - case OTG_STATE_A_WAIT_VRISE: - /* we skip over OTG_STATE_A_WAIT_BCON, since - * the HC will transition to A_HOST (or - * A_SUSPEND!) without our noticing except - * when HNP is used. - */ - if (isp_stat & INTR_VBUS_VLD) - isp->otg.state = OTG_STATE_A_HOST; - break; - case OTG_STATE_A_WAIT_VFALL: - if (!(isp_stat & INTR_SESS_VLD)) - a_idle(isp, "vfell"); - break; - default: - if (!(isp_stat & INTR_VBUS_VLD)) - isp->otg.state = OTG_STATE_A_VBUS_ERR; - break; - } - isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); - } else { - switch (state) { - case OTG_STATE_B_PERIPHERAL: - case OTG_STATE_B_HOST: - case OTG_STATE_B_WAIT_ACON: - usb_gadget_vbus_disconnect(isp->otg.gadget); - break; - default: - break; - } - if (state != OTG_STATE_A_IDLE) - a_idle(isp, "id"); - if (isp->otg.host && state == OTG_STATE_A_IDLE) - isp1301_defer_work(isp, WORK_HOST_RESUME); - isp_bstat = 0; - } - } else { - u32 l; - - /* if user unplugged mini-A end of cable, - * don't bypass A_WAIT_VFALL. - */ - if (isp->otg.default_a) { - switch (state) { - default: - isp->otg.state = OTG_STATE_A_WAIT_VFALL; - break; - case OTG_STATE_A_WAIT_VFALL: - state = OTG_STATE_A_IDLE; - /* khubd may take a while to notice and - * handle this disconnect, so don't go - * to B_IDLE quite yet. - */ - break; - case OTG_STATE_A_IDLE: - host_suspend(isp); - isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, - MC1_BDIS_ACON_EN); - isp->otg.state = OTG_STATE_B_IDLE; - l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; - l &= ~OTG_CTRL_BITS; - omap_writel(l, OTG_CTRL); - break; - case OTG_STATE_B_IDLE: - break; - } - } - isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS); - - switch (isp->otg.state) { - case OTG_STATE_B_PERIPHERAL: - case OTG_STATE_B_WAIT_ACON: - case OTG_STATE_B_HOST: - if (likely(isp_bstat & OTG_B_SESS_VLD)) - break; - enable_vbus_draw(isp, 0); -#ifndef CONFIG_USB_OTG - /* UDC driver will clear OTG_BSESSVLD */ - isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, - OTG1_DP_PULLDOWN); - isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, - OTG1_DP_PULLUP); - dump_regs(isp, __func__); -#endif - /* FALLTHROUGH */ - case OTG_STATE_B_SRP_INIT: - b_idle(isp, __func__); - l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS; - omap_writel(l, OTG_CTRL); - /* FALLTHROUGH */ - case OTG_STATE_B_IDLE: - if (isp->otg.gadget && (isp_bstat & OTG_B_SESS_VLD)) { -#ifdef CONFIG_USB_OTG - update_otg1(isp, isp_stat); - update_otg2(isp, isp_bstat); -#endif - b_peripheral(isp); - } else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD))) - isp_bstat |= OTG_B_SESS_END; - break; - case OTG_STATE_A_WAIT_VFALL: - break; - default: - pr_debug("otg: unsupported b-device %s\n", - state_name(isp)); - break; - } - } - - if (state != isp->otg.state) - pr_debug(" isp, %s -> %s\n", - state_string(state), state_name(isp)); - -#ifdef CONFIG_USB_OTG - /* update the OTG controller state to match the isp1301; may - * trigger OPRT_CHG irqs for changes going to the isp1301. - */ - update_otg1(isp, isp_stat); - update_otg2(isp, isp_bstat); - check_state(isp, __func__); -#endif - - dump_regs(isp, "isp1301->otg"); -} - -/*-------------------------------------------------------------------------*/ - -static u8 isp1301_clear_latch(struct isp1301 *isp) -{ - u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH); - isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch); - return latch; -} - -static void -isp1301_work(struct work_struct *work) -{ - struct isp1301 *isp = container_of(work, struct isp1301, work); - int stop; - - /* implicit lock: we're the only task using this device */ - isp->working = 1; - do { - stop = test_bit(WORK_STOP, &isp->todo); - -#ifdef CONFIG_USB_OTG - /* transfer state from otg engine to isp1301 */ - if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) { - otg_update_isp(isp); - put_device(&isp->client->dev); - } -#endif - /* transfer state from isp1301 to otg engine */ - if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) { - u8 stat = isp1301_clear_latch(isp); - - isp_update_otg(isp, stat); - put_device(&isp->client->dev); - } - - if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) { - u32 otg_ctrl; - - /* - * skip A_WAIT_VRISE; hc transitions invisibly - * skip A_WAIT_BCON; same. - */ - switch (isp->otg.state) { - case OTG_STATE_A_WAIT_BCON: - case OTG_STATE_A_WAIT_VRISE: - isp->otg.state = OTG_STATE_A_HOST; - pr_debug(" --> a_host\n"); - otg_ctrl = omap_readl(OTG_CTRL); - otg_ctrl |= OTG_A_BUSREQ; - otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ) - & OTG_CTRL_MASK; - omap_writel(otg_ctrl, OTG_CTRL); - break; - case OTG_STATE_B_WAIT_ACON: - isp->otg.state = OTG_STATE_B_HOST; - pr_debug(" --> b_host (acon)\n"); - break; - case OTG_STATE_B_HOST: - case OTG_STATE_B_IDLE: - case OTG_STATE_A_IDLE: - break; - default: - pr_debug(" host resume in %s\n", - state_name(isp)); - } - host_resume(isp); - // mdelay(10); - put_device(&isp->client->dev); - } - - if (test_and_clear_bit(WORK_TIMER, &isp->todo)) { -#ifdef VERBOSE - dump_regs(isp, "timer"); - if (!stop) - mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); -#endif - put_device(&isp->client->dev); - } - - if (isp->todo) - dev_vdbg(&isp->client->dev, - "work done, todo = 0x%lx\n", - isp->todo); - if (stop) { - dev_dbg(&isp->client->dev, "stop\n"); - break; - } - } while (isp->todo); - isp->working = 0; -} - -static irqreturn_t isp1301_irq(int irq, void *isp) -{ - isp1301_defer_work(isp, WORK_UPDATE_OTG); - return IRQ_HANDLED; -} - -static void isp1301_timer(unsigned long _isp) -{ - isp1301_defer_work((void *)_isp, WORK_TIMER); -} - -/*-------------------------------------------------------------------------*/ - -static void isp1301_release(struct device *dev) -{ - struct isp1301 *isp; - - isp = dev_get_drvdata(dev); - - /* FIXME -- not with a "new style" driver, it doesn't!! */ - - /* ugly -- i2c hijacks our memory hook to wait_for_completion() */ - if (isp->i2c_release) - isp->i2c_release(dev); - kfree (isp); -} - -static struct isp1301 *the_transceiver; - -static int __exit isp1301_remove(struct i2c_client *i2c) -{ - struct isp1301 *isp; - - isp = i2c_get_clientdata(i2c); - - isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); - isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); - free_irq(i2c->irq, isp); -#ifdef CONFIG_USB_OTG - otg_unbind(isp); -#endif - if (machine_is_omap_h2()) - gpio_free(2); - - isp->timer.data = 0; - set_bit(WORK_STOP, &isp->todo); - del_timer_sync(&isp->timer); - flush_scheduled_work(); - - put_device(&i2c->dev); - the_transceiver = NULL; - - return 0; -} - -/*-------------------------------------------------------------------------*/ - -/* NOTE: three modes are possible here, only one of which - * will be standards-conformant on any given system: - * - * - OTG mode (dual-role), required if there's a Mini-AB connector - * - HOST mode, for when there's one or more A (host) connectors - * - DEVICE mode, for when there's a B/Mini-B (device) connector - * - * As a rule, you won't have an isp1301 chip unless it's there to - * support the OTG mode. Other modes help testing USB controllers - * in isolation from (full) OTG support, or maybe so later board - * revisions can help to support those feature. - */ - -#ifdef CONFIG_USB_OTG - -static int isp1301_otg_enable(struct isp1301 *isp) -{ - power_up(isp); - otg_init(isp); - - /* NOTE: since we don't change this, this provides - * a few more interrupts than are strictly needed. - */ - isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, - INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); - isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, - INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND); - - dev_info(&isp->client->dev, "ready for dual-role USB ...\n"); - - return 0; -} - -#endif - -/* add or disable the host device+driver */ -static int -isp1301_set_host(struct otg_transceiver *otg, struct usb_bus *host) -{ - struct isp1301 *isp = container_of(otg, struct isp1301, otg); - - if (!otg || isp != the_transceiver) - return -ENODEV; - - if (!host) { - omap_writew(0, OTG_IRQ_EN); - power_down(isp); - isp->otg.host = NULL; - return 0; - } - -#ifdef CONFIG_USB_OTG - isp->otg.host = host; - dev_dbg(&isp->client->dev, "registered host\n"); - host_suspend(isp); - if (isp->otg.gadget) - return isp1301_otg_enable(isp); - return 0; - -#elif !defined(CONFIG_USB_GADGET_OMAP) - // FIXME update its refcount - isp->otg.host = host; - - power_up(isp); - - if (machine_is_omap_h2()) - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); - - dev_info(&isp->client->dev, "A-Host sessions ok\n"); - isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, - INTR_ID_GND); - isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, - INTR_ID_GND); - - /* If this has a Mini-AB connector, this mode is highly - * nonstandard ... but can be handy for testing, especially with - * the Mini-A end of an OTG cable. (Or something nonstandard - * like MiniB-to-StandardB, maybe built with a gender mender.) - */ - isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV); - - dump_regs(isp, __func__); - - return 0; - -#else - dev_dbg(&isp->client->dev, "host sessions not allowed\n"); - return -EINVAL; -#endif - -} - -static int -isp1301_set_peripheral(struct otg_transceiver *otg, struct usb_gadget *gadget) -{ - struct isp1301 *isp = container_of(otg, struct isp1301, otg); -#ifndef CONFIG_USB_OTG - u32 l; -#endif - - if (!otg || isp != the_transceiver) - return -ENODEV; - - if (!gadget) { - omap_writew(0, OTG_IRQ_EN); - if (!isp->otg.default_a) - enable_vbus_draw(isp, 0); - usb_gadget_vbus_disconnect(isp->otg.gadget); - isp->otg.gadget = NULL; - power_down(isp); - return 0; - } - -#ifdef CONFIG_USB_OTG - isp->otg.gadget = gadget; - dev_dbg(&isp->client->dev, "registered gadget\n"); - /* gadget driver may be suspended until vbus_connect () */ - if (isp->otg.host) - return isp1301_otg_enable(isp); - return 0; - -#elif !defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE) - isp->otg.gadget = gadget; - // FIXME update its refcount - - l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK; - l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS); - l |= OTG_ID; - omap_writel(l, OTG_CTRL); - - power_up(isp); - isp->otg.state = OTG_STATE_B_IDLE; - - if (machine_is_omap_h2() || machine_is_omap_h3()) - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0); - - isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING, - INTR_SESS_VLD); - isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING, - INTR_VBUS_VLD); - dev_info(&isp->client->dev, "B-Peripheral sessions ok\n"); - dump_regs(isp, __func__); - - /* If this has a Mini-AB connector, this mode is highly - * nonstandard ... but can be handy for testing, so long - * as you don't plug a Mini-A cable into the jack. - */ - if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD) - b_peripheral(isp); - - return 0; - -#else - dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n"); - return -EINVAL; -#endif -} - - -/*-------------------------------------------------------------------------*/ - -static int -isp1301_set_power(struct otg_transceiver *dev, unsigned mA) -{ - if (!the_transceiver) - return -ENODEV; - if (dev->state == OTG_STATE_B_PERIPHERAL) - enable_vbus_draw(the_transceiver, mA); - return 0; -} - -static int -isp1301_start_srp(struct otg_transceiver *dev) -{ - struct isp1301 *isp = container_of(dev, struct isp1301, otg); - u32 otg_ctrl; - - if (!dev || isp != the_transceiver - || isp->otg.state != OTG_STATE_B_IDLE) - return -ENODEV; - - otg_ctrl = omap_readl(OTG_CTRL); - if (!(otg_ctrl & OTG_BSESSEND)) - return -EINVAL; - - otg_ctrl |= OTG_B_BUSREQ; - otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK; - omap_writel(otg_ctrl, OTG_CTRL); - isp->otg.state = OTG_STATE_B_SRP_INIT; - - pr_debug("otg: SRP, %s ... %06x\n", state_name(isp), - omap_readl(OTG_CTRL)); -#ifdef CONFIG_USB_OTG - check_state(isp, __func__); -#endif - return 0; -} - -static int -isp1301_start_hnp(struct otg_transceiver *dev) -{ -#ifdef CONFIG_USB_OTG - struct isp1301 *isp = container_of(dev, struct isp1301, otg); - u32 l; - - if (!dev || isp != the_transceiver) - return -ENODEV; - if (isp->otg.default_a && (isp->otg.host == NULL - || !isp->otg.host->b_hnp_enable)) - return -ENOTCONN; - if (!isp->otg.default_a && (isp->otg.gadget == NULL - || !isp->otg.gadget->b_hnp_enable)) - return -ENOTCONN; - - /* We want hardware to manage most HNP protocol timings. - * So do this part as early as possible... - */ - switch (isp->otg.state) { - case OTG_STATE_B_HOST: - isp->otg.state = OTG_STATE_B_PERIPHERAL; - /* caller will suspend next */ - break; - case OTG_STATE_A_HOST: -#if 0 - /* autoconnect mode avoids irq latency bugs */ - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, - MC1_BDIS_ACON_EN); -#endif - /* caller must suspend then clear A_BUSREQ */ - usb_gadget_vbus_connect(isp->otg.gadget); - l = omap_readl(OTG_CTRL); - l |= OTG_A_SETB_HNPEN; - omap_writel(l, OTG_CTRL); - - break; - case OTG_STATE_A_PERIPHERAL: - /* initiated by B-Host suspend */ - break; - default: - return -EILSEQ; - } - pr_debug("otg: HNP %s, %06x ...\n", - state_name(isp), omap_readl(OTG_CTRL)); - check_state(isp, __func__); - return 0; -#else - /* srp-only */ - return -EINVAL; -#endif -} - -/*-------------------------------------------------------------------------*/ - -static int __init -isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id) -{ - int status; - struct isp1301 *isp; - - if (the_transceiver) - return 0; - - isp = kzalloc(sizeof *isp, GFP_KERNEL); - if (!isp) - return 0; - - INIT_WORK(&isp->work, isp1301_work); - init_timer(&isp->timer); - isp->timer.function = isp1301_timer; - isp->timer.data = (unsigned long) isp; - - i2c_set_clientdata(i2c, isp); - isp->client = i2c; - - /* verify the chip (shouldn't be necesary) */ - status = isp1301_get_u16(isp, ISP1301_VENDOR_ID); - if (status != I2C_VENDOR_ID_PHILIPS) { - dev_dbg(&i2c->dev, "not philips id: %d\n", status); - goto fail; - } - status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID); - if (status != I2C_PRODUCT_ID_PHILIPS_1301) { - dev_dbg(&i2c->dev, "not isp1301, %d\n", status); - goto fail; - } - isp->i2c_release = i2c->dev.release; - i2c->dev.release = isp1301_release; - - /* initial development used chiprev 2.00 */ - status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE); - dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n", - status >> 8, status & 0xff); - - /* make like power-on reset */ - isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK); - - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI); - isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI); - - isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, - OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN); - isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, - ~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); - - isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0); - isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0); - isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0); - -#ifdef CONFIG_USB_OTG - status = otg_bind(isp); - if (status < 0) { - dev_dbg(&i2c->dev, "can't bind OTG\n"); - goto fail; - } -#endif - - if (machine_is_omap_h2()) { - /* full speed signaling by default */ - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, - MC1_SPEED); - isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, - MC2_SPD_SUSP_CTRL); - - /* IRQ wired at M14 */ - omap_cfg_reg(M14_1510_GPIO2); - if (gpio_request(2, "isp1301") == 0) - gpio_direction_input(2); - isp->irq_type = IRQF_TRIGGER_FALLING; - } - - isp->irq_type |= IRQF_SAMPLE_RANDOM; - status = request_irq(i2c->irq, isp1301_irq, - isp->irq_type, DRIVER_NAME, isp); - if (status < 0) { - dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n", - i2c->irq, status); - goto fail; - } - - isp->otg.dev = &i2c->dev; - isp->otg.label = DRIVER_NAME; - - isp->otg.set_host = isp1301_set_host, - isp->otg.set_peripheral = isp1301_set_peripheral, - isp->otg.set_power = isp1301_set_power, - isp->otg.start_srp = isp1301_start_srp, - isp->otg.start_hnp = isp1301_start_hnp, - - enable_vbus_draw(isp, 0); - power_down(isp); - the_transceiver = isp; - -#ifdef CONFIG_USB_OTG - update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE)); - update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS)); -#endif - - dump_regs(isp, __func__); - -#ifdef VERBOSE - mod_timer(&isp->timer, jiffies + TIMER_JIFFIES); - dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES); -#endif - - status = otg_set_transceiver(&isp->otg); - if (status < 0) - dev_err(&i2c->dev, "can't register transceiver, %d\n", - status); - - return 0; - -fail: - kfree(isp); - return -ENODEV; -} - -static const struct i2c_device_id isp1301_id[] = { - { "isp1301_omap", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, isp1301_id); - -static struct i2c_driver isp1301_driver = { - .driver = { - .name = "isp1301_omap", - }, - .probe = isp1301_probe, - .remove = __exit_p(isp1301_remove), - .id_table = isp1301_id, -}; - -/*-------------------------------------------------------------------------*/ - -static int __init isp_init(void) -{ - return i2c_add_driver(&isp1301_driver); -} -module_init(isp_init); - -static void __exit isp_exit(void) -{ - if (the_transceiver) - otg_set_transceiver(NULL); - i2c_del_driver(&isp1301_driver); -} -module_exit(isp_exit); - |
