diff options
Diffstat (limited to 'drivers/media/usb/cpia2/cpia2_v4l.c')
| -rw-r--r-- | drivers/media/usb/cpia2/cpia2_v4l.c | 1267 |
1 files changed, 1267 insertions, 0 deletions
diff --git a/drivers/media/usb/cpia2/cpia2_v4l.c b/drivers/media/usb/cpia2/cpia2_v4l.c new file mode 100644 index 000000000000..5ca6f44b4c63 --- /dev/null +++ b/drivers/media/usb/cpia2/cpia2_v4l.c @@ -0,0 +1,1267 @@ +/**************************************************************************** + * + * Filename: cpia2_v4l.c + * + * Copyright 2001, STMicrolectronics, Inc. + * Contact: steve.miller@st.com + * Copyright 2001,2005, Scott J. Bertin <scottbertin@yahoo.com> + * + * Description: + * This is a USB driver for CPia2 based video cameras. + * The infrastructure of this driver is based on the cpia usb driver by + * Jochen Scharrlach and Johannes Erdfeldt. + * + * 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. + * + * Stripped of 2.4 stuff ready for main kernel submit by + * Alan Cox <alan@lxorguk.ukuu.org.uk> + ****************************************************************************/ + +#define CPIA_VERSION "3.0.1" + +#include <linux/module.h> +#include <linux/time.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/videodev2.h> +#include <linux/stringify.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-event.h> + +#include "cpia2.h" + +static int video_nr = -1; +module_param(video_nr, int, 0); +MODULE_PARM_DESC(video_nr, "video device to register (0=/dev/video0, etc)"); + +static int buffer_size = 68 * 1024; +module_param(buffer_size, int, 0); +MODULE_PARM_DESC(buffer_size, "Size for each frame buffer in bytes (default 68k)"); + +static int num_buffers = 3; +module_param(num_buffers, int, 0); +MODULE_PARM_DESC(num_buffers, "Number of frame buffers (1-" + __stringify(VIDEO_MAX_FRAME) ", default 3)"); + +static int alternate = DEFAULT_ALT; +module_param(alternate, int, 0); +MODULE_PARM_DESC(alternate, "USB Alternate (" __stringify(USBIF_ISO_1) "-" + __stringify(USBIF_ISO_6) ", default " + __stringify(DEFAULT_ALT) ")"); + +static int flicker_mode; +module_param(flicker_mode, int, 0); +MODULE_PARM_DESC(flicker_mode, "Flicker frequency (0 (disabled), " __stringify(50) " or " + __stringify(60) ", default 0)"); + +MODULE_AUTHOR("Steve Miller (STMicroelectronics) <steve.miller@st.com>"); +MODULE_DESCRIPTION("V4L-driver for STMicroelectronics CPiA2 based cameras"); +MODULE_SUPPORTED_DEVICE("video"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(CPIA_VERSION); + +#define ABOUT "V4L-Driver for Vision CPiA2 based cameras" +#define CPIA2_CID_USB_ALT (V4L2_CID_USER_BASE | 0xf000) + +/****************************************************************************** + * + * cpia2_open + * + *****************************************************************************/ +static int cpia2_open(struct file *file) +{ + struct camera_data *cam = video_drvdata(file); + int retval; + + if (mutex_lock_interruptible(&cam->v4l2_lock)) + return -ERESTARTSYS; + retval = v4l2_fh_open(file); + if (retval) + goto open_unlock; + + if (v4l2_fh_is_singular_file(file)) { + if (cpia2_allocate_buffers(cam)) { + v4l2_fh_release(file); + retval = -ENOMEM; + goto open_unlock; + } + + /* reset the camera */ + if (cpia2_reset_camera(cam) < 0) { + v4l2_fh_release(file); + retval = -EIO; + goto open_unlock; + } + + cam->APP_len = 0; + cam->COM_len = 0; + } + + cpia2_dbg_dump_registers(cam); +open_unlock: + mutex_unlock(&cam->v4l2_lock); + return retval; +} + +/****************************************************************************** + * + * cpia2_close + * + *****************************************************************************/ +static int cpia2_close(struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct camera_data *cam = video_get_drvdata(dev); + + mutex_lock(&cam->v4l2_lock); + if (video_is_registered(&cam->vdev) && v4l2_fh_is_singular_file(file)) { + cpia2_usb_stream_stop(cam); + + /* save camera state for later open */ + cpia2_save_camera_state(cam); + + cpia2_set_low_power(cam); + cpia2_free_buffers(cam); + } + + if (cam->stream_fh == file->private_data) { + cam->stream_fh = NULL; + cam->mmapped = 0; + } + mutex_unlock(&cam->v4l2_lock); + return v4l2_fh_release(file); +} + +/****************************************************************************** + * + * cpia2_v4l_read + * + *****************************************************************************/ +static ssize_t cpia2_v4l_read(struct file *file, char __user *buf, size_t count, + loff_t *off) +{ + struct camera_data *cam = video_drvdata(file); + int noblock = file->f_flags&O_NONBLOCK; + ssize_t ret; + + if(!cam) + return -EINVAL; + + if (mutex_lock_interruptible(&cam->v4l2_lock)) + return -ERESTARTSYS; + ret = cpia2_read(cam, buf, count, noblock); + mutex_unlock(&cam->v4l2_lock); + return ret; +} + + +/****************************************************************************** + * + * cpia2_v4l_poll + * + *****************************************************************************/ +static unsigned int cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait) +{ + struct camera_data *cam = video_drvdata(filp); + unsigned int res; + + mutex_lock(&cam->v4l2_lock); + res = cpia2_poll(cam, filp, wait); + mutex_unlock(&cam->v4l2_lock); + return res; +} + + +static int sync(struct camera_data *cam, int frame_nr) +{ + struct framebuf *frame = &cam->buffers[frame_nr]; + + while (1) { + if (frame->status == FRAME_READY) + return 0; + + if (!cam->streaming) { + frame->status = FRAME_READY; + frame->length = 0; + return 0; + } + + mutex_unlock(&cam->v4l2_lock); + wait_event_interruptible(cam->wq_stream, + !cam->streaming || + frame->status == FRAME_READY); + mutex_lock(&cam->v4l2_lock); + if (signal_pending(current)) + return -ERESTARTSYS; + if (!video_is_registered(&cam->vdev)) + return -ENOTTY; + } +} + +/****************************************************************************** + * + * ioctl_querycap + * + * V4L2 device capabilities + * + *****************************************************************************/ + +static int cpia2_querycap(struct file *file, void *fh, struct v4l2_capability *vc) +{ + struct camera_data *cam = video_drvdata(file); + + strcpy(vc->driver, "cpia2"); + + if (cam->params.pnp_id.product == 0x151) + strcpy(vc->card, "QX5 Microscope"); + else + strcpy(vc->card, "CPiA2 Camera"); + switch (cam->params.pnp_id.device_type) { + case DEVICE_STV_672: + strcat(vc->card, " (672/"); + break; + case DEVICE_STV_676: + strcat(vc->card, " (676/"); + break; + default: + strcat(vc->card, " (XXX/"); + break; + } + switch (cam->params.version.sensor_flags) { + case CPIA2_VP_SENSOR_FLAGS_404: + strcat(vc->card, "404)"); + break; + case CPIA2_VP_SENSOR_FLAGS_407: + strcat(vc->card, "407)"); + break; + case CPIA2_VP_SENSOR_FLAGS_409: + strcat(vc->card, "409)"); + break; + case CPIA2_VP_SENSOR_FLAGS_410: + strcat(vc->card, "410)"); + break; + case CPIA2_VP_SENSOR_FLAGS_500: + strcat(vc->card, "500)"); + break; + default: + strcat(vc->card, "XXX)"); + break; + } + + if (usb_make_path(cam->dev, vc->bus_info, sizeof(vc->bus_info)) <0) + memset(vc->bus_info,0, sizeof(vc->bus_info)); + + vc->device_caps = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_READWRITE | + V4L2_CAP_STREAMING; + vc->capabilities = vc->device_caps | + V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +/****************************************************************************** + * + * ioctl_input + * + * V4L2 input get/set/enumerate + * + *****************************************************************************/ + +static int cpia2_enum_input(struct file *file, void *fh, struct v4l2_input *i) +{ + if (i->index) + return -EINVAL; + strcpy(i->name, "Camera"); + i->type = V4L2_INPUT_TYPE_CAMERA; + return 0; +} + +static int cpia2_g_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int cpia2_s_input(struct file *file, void *fh, unsigned int i) +{ + return i ? -EINVAL : 0; +} + +/****************************************************************************** + * + * ioctl_enum_fmt + * + * V4L2 format enumerate + * + *****************************************************************************/ + +static int cpia2_enum_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + int index = f->index; + + if (index < 0 || index > 1) + return -EINVAL; + + memset(f, 0, sizeof(*f)); + f->index = index; + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + f->flags = V4L2_FMT_FLAG_COMPRESSED; + switch(index) { + case 0: + strcpy(f->description, "MJPEG"); + f->pixelformat = V4L2_PIX_FMT_MJPEG; + break; + case 1: + strcpy(f->description, "JPEG"); + f->pixelformat = V4L2_PIX_FMT_JPEG; + break; + default: + return -EINVAL; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_try_fmt + * + * V4L2 format try + * + *****************************************************************************/ + +static int cpia2_try_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + + if (f->fmt.pix.pixelformat != V4L2_PIX_FMT_MJPEG && + f->fmt.pix.pixelformat != V4L2_PIX_FMT_JPEG) + return -EINVAL; + + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.bytesperline = 0; + f->fmt.pix.sizeimage = cam->frame_size; + f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; + f->fmt.pix.priv = 0; + + switch (cpia2_match_video_size(f->fmt.pix.width, f->fmt.pix.height)) { + case VIDEOSIZE_VGA: + f->fmt.pix.width = 640; + f->fmt.pix.height = 480; + break; + case VIDEOSIZE_CIF: + f->fmt.pix.width = 352; + f->fmt.pix.height = 288; + break; + case VIDEOSIZE_QVGA: + f->fmt.pix.width = 320; + f->fmt.pix.height = 240; + break; + case VIDEOSIZE_288_216: + f->fmt.pix.width = 288; + f->fmt.pix.height = 216; + break; + case VIDEOSIZE_256_192: + f->fmt.pix.width = 256; + f->fmt.pix.height = 192; + break; + case VIDEOSIZE_224_168: + f->fmt.pix.width = 224; + f->fmt.pix.height = 168; + break; + case VIDEOSIZE_192_144: + f->fmt.pix.width = 192; + f->fmt.pix.height = 144; + break; + case VIDEOSIZE_QCIF: + default: + f->fmt.pix.width = 176; + f->fmt.pix.height = 144; + break; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_set_fmt + * + * V4L2 format set + * + *****************************************************************************/ + +static int cpia2_s_fmt_vid_cap(struct file *file, void *_fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + int err, frame; + + err = cpia2_try_fmt_vid_cap(file, _fh, f); + if(err != 0) + return err; + + cam->pixelformat = f->fmt.pix.pixelformat; + + /* NOTE: This should be set to 1 for MJPEG, but some apps don't handle + * the missing Huffman table properly. */ + cam->params.compression.inhibit_htables = 0; + /*f->fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG;*/ + + /* we set the video window to something smaller or equal to what + * is requested by the user??? + */ + DBG("Requested width = %d, height = %d\n", + f->fmt.pix.width, f->fmt.pix.height); + if (f->fmt.pix.width != cam->width || + f->fmt.pix.height != cam->height) { + cam->width = f->fmt.pix.width; + cam->height = f->fmt.pix.height; + cam->params.roi.width = f->fmt.pix.width; + cam->params.roi.height = f->fmt.pix.height; + cpia2_set_format(cam); + } + + for (frame = 0; frame < cam->num_frames; ++frame) { + if (cam->buffers[frame].status == FRAME_READING) + if ((err = sync(cam, frame)) < 0) + return err; + + cam->buffers[frame].status = FRAME_EMPTY; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_get_fmt + * + * V4L2 format get + * + *****************************************************************************/ + +static int cpia2_g_fmt_vid_cap(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct camera_data *cam = video_drvdata(file); + + f->fmt.pix.width = cam->width; + f->fmt.pix.height = cam->height; + f->fmt.pix.pixelformat = cam->pixelformat; + f->fmt.pix.field = V4L2_FIELD_NONE; + f->fmt.pix.bytesperline = 0; + f->fmt.pix.sizeimage = cam->frame_size; + f->fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; + f->fmt.pix.priv = 0; + + return 0; +} + +/****************************************************************************** + * + * ioctl_cropcap + * + * V4L2 query cropping capabilities + * NOTE: cropping is currently disabled + * + *****************************************************************************/ + +static int cpia2_cropcap(struct file *file, void *fh, struct v4l2_cropcap *c) +{ + struct camera_data *cam = video_drvdata(file); + + if (c->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + c->bounds.left = 0; + c->bounds.top = 0; + c->bounds.width = cam->width; + c->bounds.height = cam->height; + c->defrect.left = 0; + c->defrect.top = 0; + c->defrect.width = cam->width; + c->defrect.height = cam->height; + c->pixelaspect.numerator = 1; + c->pixelaspect.denominator = 1; + + return 0; +} + +struct framerate_info { + int value; + struct v4l2_fract period; +}; + +static const struct framerate_info framerate_controls[] = { + { CPIA2_VP_FRAMERATE_6_25, { 4, 25 } }, + { CPIA2_VP_FRAMERATE_7_5, { 2, 15 } }, + { CPIA2_VP_FRAMERATE_12_5, { 2, 25 } }, + { CPIA2_VP_FRAMERATE_15, { 1, 15 } }, + { CPIA2_VP_FRAMERATE_25, { 1, 25 } }, + { CPIA2_VP_FRAMERATE_30, { 1, 30 } }, +}; + +static int cpia2_g_parm(struct file *file, void *fh, struct v4l2_streamparm *p) +{ + struct camera_data *cam = video_drvdata(file); + struct v4l2_captureparm *cap = &p->parm.capture; + int i; + + if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + cap->capability = V4L2_CAP_TIMEPERFRAME; + cap->readbuffers = cam->num_frames; + for (i = 0; i < ARRAY_SIZE(framerate_controls); i++) + if (cam->params.vp_params.frame_rate == framerate_controls[i].value) { + cap->timeperframe = framerate_controls[i].period; + break; + } + return 0; +} + +static int cpia2_s_parm(struct file *file, void *fh, struct v4l2_streamparm *p) +{ + struct camera_data *cam = video_drvdata(file); + struct v4l2_captureparm *cap = &p->parm.capture; + struct v4l2_fract tpf = cap->timeperframe; + int max = ARRAY_SIZE(framerate_controls) - 1; + int ret; + int i; + + ret = cpia2_g_parm(file, fh, p); + if (ret || !tpf.denominator || !tpf.numerator) + return ret; + + /* Maximum 15 fps for this model */ + if (cam->params.pnp_id.device_type == DEVICE_STV_672 && + cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500) + max -= 2; + for (i = 0; i <= max; i++) { + struct v4l2_fract f1 = tpf; + struct v4l2_fract f2 = framerate_controls[i].period; + + f1.numerator *= f2.denominator; + f2.numerator *= f1.denominator; + if (f1.numerator >= f2.numerator) + break; + } + if (i > max) + i = max; + cap->timeperframe = framerate_controls[i].period; + return cpia2_set_fps(cam, framerate_controls[i].value); +} + +static const struct { + u32 width; + u32 height; +} cpia2_framesizes[] = { + { 640, 480 }, + { 352, 288 }, + { 320, 240 }, + { 288, 216 }, + { 256, 192 }, + { 224, 168 }, + { 192, 144 }, + { 176, 144 }, +}; + +static int cpia2_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + + if (fsize->pixel_format != V4L2_PIX_FMT_MJPEG && + fsize->pixel_format != V4L2_PIX_FMT_JPEG) + return -EINVAL; + if (fsize->index >= ARRAY_SIZE(cpia2_framesizes)) + return -EINVAL; + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = cpia2_framesizes[fsize->index].width; + fsize->discrete.height = cpia2_framesizes[fsize->index].height; + + return 0; +} + +static int cpia2_enum_frameintervals(struct file *file, void *fh, + struct v4l2_frmivalenum *fival) +{ + struct camera_data *cam = video_drvdata(file); + int max = ARRAY_SIZE(framerate_controls) - 1; + int i; + + if (fival->pixel_format != V4L2_PIX_FMT_MJPEG && + fival->pixel_format != V4L2_PIX_FMT_JPEG) + return -EINVAL; + + /* Maximum 15 fps for this model */ + if (cam->params.pnp_id.device_type == DEVICE_STV_672 && + cam->params.version.sensor_flags == CPIA2_VP_SENSOR_FLAGS_500) + max -= 2; + if (fival->index > max) + return -EINVAL; + for (i = 0; i < ARRAY_SIZE(cpia2_framesizes); i++) + if (fival->width == cpia2_framesizes[i].width && + fival->height == cpia2_framesizes[i].height) + break; + if (i == ARRAY_SIZE(cpia2_framesizes)) + return -EINVAL; + fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; + fival->discrete = framerate_controls[fival->index].period; + return 0; +} + +/****************************************************************************** + * + * ioctl_s_ctrl + * + * V4L2 set the value of a control variable + * + *****************************************************************************/ + +static int cpia2_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct camera_data *cam = + container_of(ctrl->handler, struct camera_data, hdl); + static const int flicker_table[] = { + NEVER_FLICKER, + FLICKER_50, + FLICKER_60, + }; + + DBG("Set control id:%d, value:%d\n", ctrl->id, ctrl->val); + + switch (ctrl->id) { + case V4L2_CID_BRIGHTNESS: + cpia2_set_brightness(cam, ctrl->val); + break; + case V4L2_CID_CONTRAST: + cpia2_set_contrast(cam, ctrl->val); + break; + case V4L2_CID_SATURATION: + cpia2_set_saturation(cam, ctrl->val); + break; + case V4L2_CID_HFLIP: + cpia2_set_property_mirror(cam, ctrl->val); + break; + case V4L2_CID_VFLIP: + cpia2_set_property_flip(cam, ctrl->val); + break; + case V4L2_CID_POWER_LINE_FREQUENCY: + return cpia2_set_flicker_mode(cam, flicker_table[ctrl->val]); + case V4L2_CID_ILLUMINATORS_1: + return cpia2_set_gpio(cam, (cam->top_light->val << 6) | + (cam->bottom_light->val << 7)); + case V4L2_CID_JPEG_ACTIVE_MARKER: + cam->params.compression.inhibit_htables = + !(ctrl->val & V4L2_JPEG_ACTIVE_MARKER_DHT); + break; + case V4L2_CID_JPEG_COMPRESSION_QUALITY: + cam->params.vc_params.quality = ctrl->val; + break; + case CPIA2_CID_USB_ALT: + cam->params.camera_state.stream_mode = ctrl->val; + break; + default: + return -EINVAL; + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_g_jpegcomp + * + * V4L2 get the JPEG compression parameters + * + *****************************************************************************/ + +static int cpia2_g_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms) +{ + struct camera_data *cam = video_drvdata(file); + + memset(parms, 0, sizeof(*parms)); + + parms->quality = 80; // TODO: Can this be made meaningful? + + parms->jpeg_markers = V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI; + if(!cam->params.compression.inhibit_htables) { + parms->jpeg_markers |= V4L2_JPEG_MARKER_DHT; + } + + parms->APPn = cam->APPn; + parms->APP_len = cam->APP_len; + if(cam->APP_len > 0) { + memcpy(parms->APP_data, cam->APP_data, cam->APP_len); + parms->jpeg_markers |= V4L2_JPEG_MARKER_APP; + } + + parms->COM_len = cam->COM_len; + if(cam->COM_len > 0) { + memcpy(parms->COM_data, cam->COM_data, cam->COM_len); + parms->jpeg_markers |= JPEG_MARKER_COM; + } + + DBG("G_JPEGCOMP APP_len:%d COM_len:%d\n", + parms->APP_len, parms->COM_len); + + return 0; +} + +/****************************************************************************** + * + * ioctl_s_jpegcomp + * + * V4L2 set the JPEG compression parameters + * NOTE: quality and some jpeg_markers are ignored. + * + *****************************************************************************/ + +static int cpia2_s_jpegcomp(struct file *file, void *fh, struct v4l2_jpegcompression *parms) +{ + struct camera_data *cam = video_drvdata(file); + + DBG("S_JPEGCOMP APP_len:%d COM_len:%d\n", + parms->APP_len, parms->COM_len); + + cam->params.compression.inhibit_htables = + !(parms->jpeg_markers & V4L2_JPEG_MARKER_DHT); + parms->jpeg_markers &= V4L2_JPEG_MARKER_DQT | V4L2_JPEG_MARKER_DRI | + V4L2_JPEG_MARKER_DHT; + + if(parms->APP_len != 0) { + if(parms->APP_len > 0 && + parms->APP_len <= sizeof(cam->APP_data) && + parms->APPn >= 0 && parms->APPn <= 15) { + cam->APPn = parms->APPn; + cam->APP_len = parms->APP_len; + memcpy(cam->APP_data, parms->APP_data, parms->APP_len); + } else { + LOG("Bad APPn Params n=%d len=%d\n", + parms->APPn, parms->APP_len); + return -EINVAL; + } + } else { + cam->APP_len = 0; + } + + if(parms->COM_len != 0) { + if(parms->COM_len > 0 && + parms->COM_len <= sizeof(cam->COM_data)) { + cam->COM_len = parms->COM_len; + memcpy(cam->COM_data, parms->COM_data, parms->COM_len); + } else { + LOG("Bad COM_len=%d\n", parms->COM_len); + return -EINVAL; + } + } + + return 0; +} + +/****************************************************************************** + * + * ioctl_reqbufs + * + * V4L2 Initiate memory mapping. + * NOTE: The user's request is ignored. For now the buffers are fixed. + * + *****************************************************************************/ + +static int cpia2_reqbufs(struct file *file, void *fh, struct v4l2_requestbuffers *req) +{ + struct camera_data *cam = video_drvdata(file); + + if(req->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + req->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + DBG("REQBUFS requested:%d returning:%d\n", req->count, cam->num_frames); + req->count = cam->num_frames; + memset(&req->reserved, 0, sizeof(req->reserved)); + + return 0; +} + +/****************************************************************************** + * + * ioctl_querybuf + * + * V4L2 Query memory buffer status. + * + *****************************************************************************/ + +static int cpia2_querybuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->index > cam->num_frames) + return -EINVAL; + + buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer; + buf->length = cam->frame_size; + + buf->memory = V4L2_MEMORY_MMAP; + + if(cam->mmapped) + buf->flags = V4L2_BUF_FLAG_MAPPED; + else + buf->flags = 0; + + switch (cam->buffers[buf->index].status) { + case FRAME_EMPTY: + case FRAME_ERROR: + case FRAME_READING: + buf->bytesused = 0; + buf->flags = V4L2_BUF_FLAG_QUEUED; + break; + case FRAME_READY: + buf->bytesused = cam->buffers[buf->index].length; + buf->timestamp = cam->buffers[buf->index].timestamp; + buf->sequence = cam->buffers[buf->index].seq; + buf->flags = V4L2_BUF_FLAG_DONE; + break; + } + + DBG("QUERYBUF index:%d offset:%d flags:%d seq:%d bytesused:%d\n", + buf->index, buf->m.offset, buf->flags, buf->sequence, + buf->bytesused); + + return 0; +} + +/****************************************************************************** + * + * ioctl_qbuf + * + * V4L2 User is freeing buffer + * + *****************************************************************************/ + +static int cpia2_qbuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->memory != V4L2_MEMORY_MMAP || + buf->index > cam->num_frames) + return -EINVAL; + + DBG("QBUF #%d\n", buf->index); + + if(cam->buffers[buf->index].status == FRAME_READY) + cam->buffers[buf->index].status = FRAME_EMPTY; + + return 0; +} + +/****************************************************************************** + * + * find_earliest_filled_buffer + * + * Helper for ioctl_dqbuf. Find the next ready buffer. + * + *****************************************************************************/ + +static int find_earliest_filled_buffer(struct camera_data *cam) +{ + int i; + int found = -1; + for (i=0; i<cam->num_frames; i++) { + if(cam->buffers[i].status == FRAME_READY) { + if(found < 0) { + found = i; + } else { + /* find which buffer is earlier */ + struct timeval *tv1, *tv2; + tv1 = &cam->buffers[i].timestamp; + tv2 = &cam->buffers[found].timestamp; + if(tv1->tv_sec < tv2->tv_sec || + (tv1->tv_sec == tv2->tv_sec && + tv1->tv_usec < tv2->tv_usec)) + found = i; + } + } + } + return found; +} + +/****************************************************************************** + * + * ioctl_dqbuf + * + * V4L2 User is asking for a filled buffer. + * + *****************************************************************************/ + +static int cpia2_dqbuf(struct file *file, void *fh, struct v4l2_buffer *buf) +{ + struct camera_data *cam = video_drvdata(file); + int frame; + + if(buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE || + buf->memory != V4L2_MEMORY_MMAP) + return -EINVAL; + + frame = find_earliest_filled_buffer(cam); + + if(frame < 0 && file->f_flags&O_NONBLOCK) + return -EAGAIN; + + if(frame < 0) { + /* Wait for a frame to become available */ + struct framebuf *cb=cam->curbuff; + mutex_unlock(&cam->v4l2_lock); + wait_event_interruptible(cam->wq_stream, + !video_is_registered(&cam->vdev) || + (cb=cam->curbuff)->status == FRAME_READY); + mutex_lock(&cam->v4l2_lock); + if (signal_pending(current)) + return -ERESTARTSYS; + if (!video_is_registered(&cam->vdev)) + return -ENOTTY; + frame = cb->num; + } + + + buf->index = frame; + buf->bytesused = cam->buffers[buf->index].length; + buf->flags = V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_DONE; + buf->field = V4L2_FIELD_NONE; + buf->timestamp = cam->buffers[buf->index].timestamp; + buf->sequence = cam->buffers[buf->index].seq; + buf->m.offset = cam->buffers[buf->index].data - cam->frame_buffer; + buf->length = cam->frame_size; + buf->reserved2 = 0; + buf->reserved = 0; + memset(&buf->timecode, 0, sizeof(buf->timecode)); + + DBG("DQBUF #%d status:%d seq:%d length:%d\n", buf->index, + cam->buffers[buf->index].status, buf->sequence, buf->bytesused); + + return 0; +} + +static int cpia2_streamon(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct camera_data *cam = video_drvdata(file); + int ret = -EINVAL; + + DBG("VIDIOC_STREAMON, streaming=%d\n", cam->streaming); + if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (!cam->streaming) { + ret = cpia2_usb_stream_start(cam, + cam->params.camera_state.stream_mode); + if (!ret) + v4l2_ctrl_grab(cam->usb_alt, true); + } + return ret; +} + +static int cpia2_streamoff(struct file *file, void *fh, enum v4l2_buf_type type) +{ + struct camera_data *cam = video_drvdata(file); + int ret = -EINVAL; + + DBG("VIDIOC_STREAMOFF, streaming=%d\n", cam->streaming); + if (!cam->mmapped || type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (cam->streaming) { + ret = cpia2_usb_stream_stop(cam); + if (!ret) + v4l2_ctrl_grab(cam->usb_alt, false); + } + return ret; +} + +/****************************************************************************** + * + * cpia2_mmap + * + *****************************************************************************/ +static int cpia2_mmap(struct file *file, struct vm_area_struct *area) +{ + struct camera_data *cam = video_drvdata(file); + int retval; + + if (mutex_lock_interruptible(&cam->v4l2_lock)) + return -ERESTARTSYS; + retval = cpia2_remap_buffer(cam, area); + + if(!retval) + cam->stream_fh = file->private_data; + mutex_unlock(&cam->v4l2_lock); + return retval; +} + +/****************************************************************************** + * + * reset_camera_struct_v4l + * + * Sets all values to the defaults + *****************************************************************************/ +static void reset_camera_struct_v4l(struct camera_data *cam) +{ + cam->width = cam->params.roi.width; + cam->height = cam->params.roi.height; + + cam->frame_size = buffer_size; + cam->num_frames = num_buffers; + + /* Flicker modes */ + cam->params.flicker_control.flicker_mode_req = flicker_mode; + + /* stream modes */ + cam->params.camera_state.stream_mode = alternate; + + cam->pixelformat = V4L2_PIX_FMT_JPEG; +} + +static const struct v4l2_ioctl_ops cpia2_ioctl_ops = { + .vidioc_querycap = cpia2_querycap, + .vidioc_enum_input = cpia2_enum_input, + .vidioc_g_input = cpia2_g_input, + .vidioc_s_input = cpia2_s_input, + .vidioc_enum_fmt_vid_cap = cpia2_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = cpia2_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = cpia2_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = cpia2_try_fmt_vid_cap, + .vidioc_g_jpegcomp = cpia2_g_jpegcomp, + .vidioc_s_jpegcomp = cpia2_s_jpegcomp, + .vidioc_cropcap = cpia2_cropcap, + .vidioc_reqbufs = cpia2_reqbufs, + .vidioc_querybuf = cpia2_querybuf, + .vidioc_qbuf = cpia2_qbuf, + .vidioc_dqbuf = cpia2_dqbuf, + .vidioc_streamon = cpia2_streamon, + .vidioc_streamoff = cpia2_streamoff, + .vidioc_s_parm = cpia2_s_parm, + .vidioc_g_parm = cpia2_g_parm, + .vidioc_enum_framesizes = cpia2_enum_framesizes, + .vidioc_enum_frameintervals = cpia2_enum_frameintervals, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +/*** + * The v4l video device structure initialized for this device + ***/ +static const struct v4l2_file_operations cpia2_fops = { + .owner = THIS_MODULE, + .open = cpia2_open, + .release = cpia2_close, + .read = cpia2_v4l_read, + .poll = cpia2_v4l_poll, + .unlocked_ioctl = video_ioctl2, + .mmap = cpia2_mmap, +}; + +static struct video_device cpia2_template = { + /* I could not find any place for the old .initialize initializer?? */ + .name = "CPiA2 Camera", + .fops = &cpia2_fops, + .ioctl_ops = &cpia2_ioctl_ops, + .release = video_device_release_empty, +}; + +void cpia2_camera_release(struct v4l2_device *v4l2_dev) +{ + struct camera_data *cam = + container_of(v4l2_dev, struct camera_data, v4l2_dev); + + v4l2_ctrl_handler_free(&cam->hdl); + v4l2_device_unregister(&cam->v4l2_dev); + kfree(cam); +} + +static const struct v4l2_ctrl_ops cpia2_ctrl_ops = { + .s_ctrl = cpia2_s_ctrl, +}; + +/****************************************************************************** + * + * cpia2_register_camera + * + *****************************************************************************/ +int cpia2_register_camera(struct camera_data *cam) +{ + struct v4l2_ctrl_handler *hdl = &cam->hdl; + struct v4l2_ctrl_config cpia2_usb_alt = { + .ops = &cpia2_ctrl_ops, + .id = CPIA2_CID_USB_ALT, + .name = "USB Alternate", + .type = V4L2_CTRL_TYPE_INTEGER, + .min = USBIF_ISO_1, + .max = USBIF_ISO_6, + .step = 1, + }; + int ret; + + v4l2_ctrl_handler_init(hdl, 12); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_BRIGHTNESS, + cam->params.pnp_id.device_type == DEVICE_STV_672 ? 1 : 0, + 255, 1, DEFAULT_BRIGHTNESS); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_CONTRAST, 0, 255, 1, DEFAULT_CONTRAST); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_SATURATION, 0, 255, 1, DEFAULT_SATURATION); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_HFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_JPEG_ACTIVE_MARKER, 0, + V4L2_JPEG_ACTIVE_MARKER_DHT, 0, + V4L2_JPEG_ACTIVE_MARKER_DHT); + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_JPEG_COMPRESSION_QUALITY, 1, + 100, 1, 100); + cpia2_usb_alt.def = alternate; + cam->usb_alt = v4l2_ctrl_new_custom(hdl, &cpia2_usb_alt, NULL); + /* VP5 Only */ + if (cam->params.pnp_id.device_type != DEVICE_STV_672) + v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + /* Flicker control only valid for 672 */ + if (cam->params.pnp_id.device_type == DEVICE_STV_672) + v4l2_ctrl_new_std_menu(hdl, &cpia2_ctrl_ops, + V4L2_CID_POWER_LINE_FREQUENCY, + V4L2_CID_POWER_LINE_FREQUENCY_60HZ, 0, 0); + /* Light control only valid for the QX5 Microscope */ + if (cam->params.pnp_id.product == 0x151) { + cam->top_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_ILLUMINATORS_1, 0, 1, 1, 0); + cam->bottom_light = v4l2_ctrl_new_std(hdl, &cpia2_ctrl_ops, + V4L2_CID_ILLUMINATORS_2, 0, 1, 1, 0); + v4l2_ctrl_cluster(2, &cam->top_light); + } + + if (hdl->error) { + ret = hdl->error; + v4l2_ctrl_handler_free(hdl); + return ret; + } + + cam->vdev = cpia2_template; + video_set_drvdata(&cam->vdev, cam); + cam->vdev.lock = &cam->v4l2_lock; + cam->vdev.ctrl_handler = hdl; + cam->vdev.v4l2_dev = &cam->v4l2_dev; + set_bit(V4L2_FL_USE_FH_PRIO, &cam->vdev.flags); + + reset_camera_struct_v4l(cam); + + /* register v4l device */ + if (video_register_device(&cam->vdev, VFL_TYPE_GRABBER, video_nr) < 0) { + ERR("video_register_device failed\n"); + return -ENODEV; + } + + return 0; +} + +/****************************************************************************** + * + * cpia2_unregister_camera + * + *****************************************************************************/ +void cpia2_unregister_camera(struct camera_data *cam) +{ + video_unregister_device(&cam->vdev); +} + +/****************************************************************************** + * + * check_parameters + * + * Make sure that all user-supplied parameters are sensible + *****************************************************************************/ +static void __init check_parameters(void) +{ + if(buffer_size < PAGE_SIZE) { + buffer_size = PAGE_SIZE; + LOG("buffer_size too small, setting to %d\n", buffer_size); + } else if(buffer_size > 1024*1024) { + /* arbitrary upper limiit */ + buffer_size = 1024*1024; + LOG("buffer_size ridiculously large, setting to %d\n", + buffer_size); + } else { + buffer_size += PAGE_SIZE-1; + buffer_size &= ~(PAGE_SIZE-1); + } + + if(num_buffers < 1) { + num_buffers = 1; + LOG("num_buffers too small, setting to %d\n", num_buffers); + } else if(num_buffers > VIDEO_MAX_FRAME) { + num_buffers = VIDEO_MAX_FRAME; + LOG("num_buffers too large, setting to %d\n", num_buffers); + } + + if(alternate < USBIF_ISO_1 || alternate > USBIF_ISO_6) { + alternate = DEFAULT_ALT; + LOG("alternate specified is invalid, using %d\n", alternate); + } + + if (flicker_mode != 0 && flicker_mode != FLICKER_50 && flicker_mode != FLICKER_60) { + flicker_mode = 0; + LOG("Flicker mode specified is invalid, using %d\n", + flicker_mode); + } + + DBG("Using %d buffers, each %d bytes, alternate=%d\n", + num_buffers, buffer_size, alternate); +} + +/************ Module Stuff ***************/ + + +/****************************************************************************** + * + * cpia2_init/module_init + * + *****************************************************************************/ +static int __init cpia2_init(void) +{ + LOG("%s v%s\n", + ABOUT, CPIA_VERSION); + check_parameters(); + cpia2_usb_init(); + return 0; +} + + +/****************************************************************************** + * + * cpia2_exit/module_exit + * + *****************************************************************************/ +static void __exit cpia2_exit(void) +{ + cpia2_usb_cleanup(); + schedule_timeout(2 * HZ); +} + +module_init(cpia2_init); +module_exit(cpia2_exit); |
