- 根目录:
- drivers
- media
- usb
- cpia2
- cpia2_v4l.c
/****************************************************************************
*
* 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,
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 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();
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);