| /**************************************************************************** |
| * |
| * 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. |
| * |
| * 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 __poll_t cpia2_v4l_poll(struct file *filp, struct poll_table_struct *wait) |
| { |
| struct camera_data *cam = video_drvdata(filp); |
| __poll_t 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, |
| const 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); |
| |
| 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; |
| |
| buf->flags |= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| |
| 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 |
| | V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| 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 const 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; |
| |
| 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(); |
| return cpia2_usb_init(); |
| } |
| |
| |
| /****************************************************************************** |
| * |
| * 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); |