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gerrit-public.fairphone.software / kernel / msm / e4f7c0b44a8ac8935f223195af9ea637d0c08091 / . / drivers / media / video / em28xx / em28xx-video.c
blob: 14316c912179ab32b6b2ad456f10c83b66729d22 [file] [log] [blame]
/*
em28xx-video.c - driver for Empia EM2800/EM2820/2840 USB
video capture devices
Copyright (C) 2005 Ludovico Cavedon <cavedon@sssup.it>
Markus Rechberger <mrechberger@gmail.com>
Mauro Carvalho Chehab <mchehab@infradead.org>
Sascha Sommer <saschasommer@freenet.de>
Some parts based on SN9C10x PC Camera Controllers GPL driver made
by Luca Risolia <luca.risolia@studio.unibo.it>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/init.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitmap.h>
#include <linux/usb.h>
#include <linux/i2c.h>
#include <linux/version.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include "em28xx.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-chip-ident.h>
#include <media/msp3400.h>
#include <media/tuner.h>
#define DRIVER_AUTHOR "Ludovico Cavedon <cavedon@sssup.it>, " \
"Markus Rechberger <mrechberger@gmail.com>, " \
"Mauro Carvalho Chehab <mchehab@infradead.org>, " \
"Sascha Sommer <saschasommer@freenet.de>"
#define DRIVER_DESC "Empia em28xx based USB video device driver"
#define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 2)
#define em28xx_videodbg(fmt, arg...) do {\
if (video_debug) \
printk(KERN_INFO "%s %s :"fmt, \
dev->name, __func__ , ##arg); } while (0)
static unsigned int isoc_debug;
module_param(isoc_debug, int, 0644);
MODULE_PARM_DESC(isoc_debug, "enable debug messages [isoc transfers]");
#define em28xx_isocdbg(fmt, arg...) \
do {\
if (isoc_debug) { \
printk(KERN_INFO "%s %s :"fmt, \
dev->name, __func__ , ##arg); \
} \
} while (0)
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_nr, int, NULL, 0444);
module_param_array(radio_nr, int, NULL, 0444);
MODULE_PARM_DESC(video_nr, "video device numbers");
MODULE_PARM_DESC(vbi_nr, "vbi device numbers");
MODULE_PARM_DESC(radio_nr, "radio device numbers");
static unsigned int video_debug;
module_param(video_debug, int, 0644);
MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
/* supported video standards */
static struct em28xx_fmt format[] = {
{
.name = "16 bpp YUY2, 4:2:2, packed",
.fourcc = V4L2_PIX_FMT_YUYV,
.depth = 16,
.reg = EM28XX_OUTFMT_YUV422_Y0UY1V,
}, {
.name = "16 bpp RGB 565, LE",
.fourcc = V4L2_PIX_FMT_RGB565,
.depth = 16,
.reg = EM28XX_OUTFMT_RGB_16_656,
}, {
.name = "8 bpp Bayer BGBG..GRGR",
.fourcc = V4L2_PIX_FMT_SBGGR8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_BGBG,
}, {
.name = "8 bpp Bayer GRGR..BGBG",
.fourcc = V4L2_PIX_FMT_SGRBG8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_GRGR,
}, {
.name = "8 bpp Bayer GBGB..RGRG",
.fourcc = V4L2_PIX_FMT_SGBRG8,
.depth = 8,
.reg = EM28XX_OUTFMT_RGB_8_GBGB,
}, {
.name = "12 bpp YUV411",
.fourcc = V4L2_PIX_FMT_YUV411P,
.depth = 12,
.reg = EM28XX_OUTFMT_YUV411,
},
};
/* supported controls */
/* Common to all boards */
static struct v4l2_queryctrl em28xx_qctrl[] = {
{
.id = V4L2_CID_AUDIO_VOLUME,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Volume",
.minimum = 0x0,
.maximum = 0x1f,
.step = 0x1,
.default_value = 0x1f,
.flags = 0,
}, {
.id = V4L2_CID_AUDIO_MUTE,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 1,
.flags = 0,
}
};
/* ------------------------------------------------------------------
DMA and thread functions
------------------------------------------------------------------*/
/*
* Announces that a buffer were filled and request the next
*/
static inline void buffer_filled(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf)
{
/* Advice that buffer was filled */
em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->vb.i);
buf->vb.state = VIDEOBUF_DONE;
buf->vb.field_count++;
do_gettimeofday(&buf->vb.ts);
dev->isoc_ctl.buf = NULL;
list_del(&buf->vb.queue);
wake_up(&buf->vb.done);
}
/*
* Identify the buffer header type and properly handles
*/
static void em28xx_copy_video(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf,
unsigned char *p,
unsigned char *outp, unsigned long len)
{
void *fieldstart, *startwrite, *startread;
int linesdone, currlinedone, offset, lencopy, remain;
int bytesperline = dev->width << 1;
if (dma_q->pos + len > buf->vb.size)
len = buf->vb.size - dma_q->pos;
if (p[0] != 0x88 && p[0] != 0x22) {
em28xx_isocdbg("frame is not complete\n");
len += 4;
} else
p += 4;
startread = p;
remain = len;
/* Interlaces frame */
if (buf->top_field)
fieldstart = outp;
else
fieldstart = outp + bytesperline;
linesdone = dma_q->pos / bytesperline;
currlinedone = dma_q->pos % bytesperline;
offset = linesdone * bytesperline * 2 + currlinedone;
startwrite = fieldstart + offset;
lencopy = bytesperline - currlinedone;
lencopy = lencopy > remain ? remain : lencopy;
if ((char *)startwrite + lencopy > (char *)outp + buf->vb.size) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->vb.size));
remain = (char *)outp + buf->vb.size - (char *)startwrite;
lencopy = remain;
}
if (lencopy <= 0)
return;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
while (remain > 0) {
startwrite += lencopy + bytesperline;
startread += lencopy;
if (bytesperline > remain)
lencopy = remain;
else
lencopy = bytesperline;
if ((char *)startwrite + lencopy > (char *)outp +
buf->vb.size) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end (2)\n",
((char *)startwrite + lencopy) -
((char *)outp + buf->vb.size));
lencopy = remain = (char *)outp + buf->vb.size -
(char *)startwrite;
}
if (lencopy <= 0)
break;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
}
dma_q->pos += len;
}
static inline void print_err_status(struct em28xx *dev,
int packet, int status)
{
char *errmsg = "Unknown";
switch (status) {
case -ENOENT:
errmsg = "unlinked synchronuously";
break;
case -ECONNRESET:
errmsg = "unlinked asynchronuously";
break;
case -ENOSR:
errmsg = "Buffer error (overrun)";
break;
case -EPIPE:
errmsg = "Stalled (device not responding)";
break;
case -EOVERFLOW:
errmsg = "Babble (bad cable?)";
break;
case -EPROTO:
errmsg = "Bit-stuff error (bad cable?)";
break;
case -EILSEQ:
errmsg = "CRC/Timeout (could be anything)";
break;
case -ETIME:
errmsg = "Device does not respond";
break;
}
if (packet < 0) {
em28xx_isocdbg("URB status %d [%s].\n", status, errmsg);
} else {
em28xx_isocdbg("URB packet %d, status %d [%s].\n",
packet, status, errmsg);
}
}
/*
* video-buf generic routine to get the next available buffer
*/
static inline void get_next_buf(struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer **buf)
{
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
char *outp;
if (list_empty(&dma_q->active)) {
em28xx_isocdbg("No active queue to serve\n");
dev->isoc_ctl.buf = NULL;
*buf = NULL;
return;
}
/* Get the next buffer */
*buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
/* Cleans up buffer - Usefull for testing for frame/URB loss */
outp = videobuf_to_vmalloc(&(*buf)->vb);
memset(outp, 0, (*buf)->vb.size);
dev->isoc_ctl.buf = *buf;
return;
}
/*
* Controls the isoc copy of each urb packet
*/
static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb)
{
struct em28xx_buffer *buf;
struct em28xx_dmaqueue *dma_q = urb->context;
unsigned char *outp = NULL;
int i, len = 0, rc = 1;
unsigned char *p;
if (!dev)
return 0;
if ((dev->state & DEV_DISCONNECTED) || (dev->state & DEV_MISCONFIGURED))
return 0;
if (urb->status < 0) {
print_err_status(dev, -1, urb->status);
if (urb->status == -ENOENT)
return 0;
}
buf = dev->isoc_ctl.buf;
if (buf != NULL)
outp = videobuf_to_vmalloc(&buf->vb);
for (i = 0; i < urb->number_of_packets; i++) {
int status = urb->iso_frame_desc[i].status;
if (status < 0) {
print_err_status(dev, i, status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
len = urb->iso_frame_desc[i].actual_length - 4;
if (urb->iso_frame_desc[i].actual_length <= 0) {
/* em28xx_isocdbg("packet %d is empty",i); - spammy */
continue;
}
if (urb->iso_frame_desc[i].actual_length >
dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
p = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
/* FIXME: incomplete buffer checks where removed to make
logic simpler. Impacts of those changes should be evaluated
*/
if (p[0] == 0x33 && p[1] == 0x95 && p[2] == 0x00) {
em28xx_isocdbg("VBI HEADER!!!\n");
/* FIXME: Should add vbi copy */
continue;
}
if (p[0] == 0x22 && p[1] == 0x5a) {
em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2],
len, (p[2] & 1) ? "odd" : "even");
if (!(p[2] & 1)) {
if (buf != NULL)
buffer_filled(dev, dma_q, buf);
get_next_buf(dma_q, &buf);
if (buf == NULL)
outp = NULL;
else
outp = videobuf_to_vmalloc(&buf->vb);
}
if (buf != NULL) {
if (p[2] & 1)
buf->top_field = 0;
else
buf->top_field = 1;
}
dma_q->pos = 0;
}
if (buf != NULL)
em28xx_copy_video(dev, dma_q, buf, p, outp, len);
}
return rc;
}
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static int
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
struct v4l2_frequency f;
*size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
if (0 == *count)
*count = EM28XX_DEF_BUF;
if (*count < EM28XX_MIN_BUF)
*count = EM28XX_MIN_BUF;
/* Ask tuner to go to analog or radio mode */
memset(&f, 0, sizeof(f));
f.frequency = dev->ctl_freq;
f.type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
return 0;
}
/* This is called *without* dev->slock held; please keep it that way */
static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
unsigned long flags = 0;
if (in_interrupt())
BUG();
/* We used to wait for the buffer to finish here, but this didn't work
because, as we were keeping the state as VIDEOBUF_QUEUED,
videobuf_queue_cancel marked it as finished for us.
(Also, it could wedge forever if the hardware was misconfigured.)
This should be safe; by the time we get here, the buffer isn't
queued anymore. If we ever start marking the buffers as
VIDEOBUF_ACTIVE, it won't be, though.
*/
spin_lock_irqsave(&dev->slock, flags);
if (dev->isoc_ctl.buf == buf)
dev->isoc_ctl.buf = NULL;
spin_unlock_irqrestore(&dev->slock, flags);
videobuf_vmalloc_free(&buf->vb);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
static int
buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct em28xx_fh *fh = vq->priv_data;
struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
struct em28xx *dev = fh->dev;
int rc = 0, urb_init = 0;
buf->vb.size = (fh->dev->width * fh->dev->height * dev->format->depth + 7) >> 3;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
buf->vb.width = dev->width;
buf->vb.height = dev->height;
buf->vb.field = field;
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
rc = videobuf_iolock(vq, &buf->vb, NULL);
if (rc < 0)
goto fail;
}
if (!dev->isoc_ctl.num_bufs)
urb_init = 1;
if (urb_init) {
rc = em28xx_init_isoc(dev, EM28XX_NUM_PACKETS,
EM28XX_NUM_BUFS, dev->max_pkt_size,
em28xx_isoc_copy);
if (rc < 0)
goto fail;
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
fail:
free_buffer(vq, buf);
return rc;
}
static void
buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
struct em28xx_buffer *buf = container_of(vb,
struct em28xx_buffer,
vb);
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = fh->dev;
struct em28xx_dmaqueue *vidq = &dev->vidq;
buf->vb.state = VIDEOBUF_QUEUED;
list_add_tail(&buf->vb.queue, &vidq->active);
}
static void buffer_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct em28xx_buffer *buf = container_of(vb,
struct em28xx_buffer,
vb);
struct em28xx_fh *fh = vq->priv_data;
struct em28xx *dev = (struct em28xx *)fh->dev;
em28xx_isocdbg("em28xx: called buffer_release\n");
free_buffer(vq, buf);
}
static struct videobuf_queue_ops em28xx_video_qops = {
.buf_setup = buffer_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.buf_release = buffer_release,
};
/********************* v4l2 interface **************************************/
static void video_mux(struct em28xx *dev, int index)
{
dev->ctl_input = index;
dev->ctl_ainput = INPUT(index)->amux;
dev->ctl_aoutput = INPUT(index)->aout;
if (!dev->ctl_aoutput)
dev->ctl_aoutput = EM28XX_AOUT_MASTER;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_routing,
INPUT(index)->vmux, 0, 0);
if (dev->board.has_msp34xx) {
if (dev->i2s_speed) {
v4l2_device_call_all(&dev->v4l2_dev, 0, audio,
s_i2s_clock_freq, dev->i2s_speed);
}
/* Note: this is msp3400 specific */
v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
dev->ctl_ainput, MSP_OUTPUT(MSP_SC_IN_DSP_SCART1), 0);
}
if (dev->board.adecoder != EM28XX_NOADECODER) {
v4l2_device_call_all(&dev->v4l2_dev, 0, audio, s_routing,
dev->ctl_ainput, dev->ctl_aoutput, 0);
}
em28xx_audio_analog_set(dev);
}
/* Usage lock check functions */
static int res_get(struct em28xx_fh *fh)
{
struct em28xx *dev = fh->dev;
int rc = 0;
/* This instance already has stream_on */
if (fh->stream_on)
return rc;
if (dev->stream_on)
return -EBUSY;
dev->stream_on = 1;
fh->stream_on = 1;
return rc;
}
static int res_check(struct em28xx_fh *fh)
{
return fh->stream_on;
}
static void res_free(struct em28xx_fh *fh)
{
struct em28xx *dev = fh->dev;
fh->stream_on = 0;
dev->stream_on = 0;
}
/*
* em28xx_get_ctrl()
* return the current saturation, brightness or contrast, mute state
*/
static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = dev->mute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = dev->volume;
return 0;
default:
return -EINVAL;
}
}
/*
* em28xx_set_ctrl()
* mute or set new saturation, brightness or contrast
*/
static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value != dev->mute) {
dev->mute = ctrl->value;
return em28xx_audio_analog_set(dev);
}
return 0;
case V4L2_CID_AUDIO_VOLUME:
dev->volume = ctrl->value;
return em28xx_audio_analog_set(dev);
default:
return -EINVAL;
}
}
static int check_dev(struct em28xx *dev)
{
if (dev->state & DEV_DISCONNECTED) {
em28xx_errdev("v4l2 ioctl: device not present\n");
return -ENODEV;
}
if (dev->state & DEV_MISCONFIGURED) {
em28xx_errdev("v4l2 ioctl: device is misconfigured; "
"close and open it again\n");
return -EIO;
}
return 0;
}
static void get_scale(struct em28xx *dev,
unsigned int width, unsigned int height,
unsigned int *hscale, unsigned int *vscale)
{
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
*hscale = (((unsigned long)maxw) << 12) / width - 4096L;
if (*hscale >= 0x4000)
*hscale = 0x3fff;
*vscale = (((unsigned long)maxh) << 12) / height - 4096L;
if (*vscale >= 0x4000)
*vscale = 0x3fff;
}
/* ------------------------------------------------------------------
IOCTL vidioc handling
------------------------------------------------------------------*/
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
mutex_lock(&dev->lock);
f->fmt.pix.width = dev->width;
f->fmt.pix.height = dev->height;
f->fmt.pix.pixelformat = dev->format->fourcc;
f->fmt.pix.bytesperline = (dev->width * dev->format->depth + 7) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * dev->height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
/* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
f->fmt.pix.field = dev->interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
mutex_unlock(&dev->lock);
return 0;
}
static struct em28xx_fmt *format_by_fourcc(unsigned int fourcc)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(format); i++)
if (format[i].fourcc == fourcc)
return &format[i];
return NULL;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
unsigned int width = f->fmt.pix.width;
unsigned int height = f->fmt.pix.height;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
unsigned int hscale, vscale;
struct em28xx_fmt *fmt;
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
if (!fmt) {
em28xx_videodbg("Fourcc format (%08x) invalid.\n",
f->fmt.pix.pixelformat);
return -EINVAL;
}
if (dev->board.is_27xx) {
/* FIXME: This is the only supported fmt */
width = 640;
height = 480;
} else if (dev->board.is_em2800) {
/* the em2800 can only scale down to 50% */
height = height > (3 * maxh / 4) ? maxh : maxh / 2;
width = width > (3 * maxw / 4) ? maxw : maxw / 2;
/* According to empiatech support the MaxPacketSize is too small
* to support framesizes larger than 640x480 @ 30 fps or 640x576
* @ 25 fps. As this would cut of a part of the image we prefer
* 360x576 or 360x480 for now */
if (width == maxw && height == maxh)
width /= 2;
} else {
/* width must even because of the YUYV format
height must be even because of interlacing */
v4l_bound_align_image(&width, 48, maxw, 1, &height, 32, maxh, 1, 0);
}
get_scale(dev, width, height, &hscale, &vscale);
width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
f->fmt.pix.width = width;
f->fmt.pix.height = height;
f->fmt.pix.pixelformat = fmt->fourcc;
f->fmt.pix.bytesperline = (dev->width * fmt->depth + 7) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
return 0;
}
static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
unsigned width, unsigned height)
{
struct em28xx_fmt *fmt;
/* FIXME: This is the only supported fmt */
if (dev->board.is_27xx) {
width = 640;
height = 480;
}
fmt = format_by_fourcc(fourcc);
if (!fmt)
return -EINVAL;
dev->format = fmt;
dev->width = width;
dev->height = height;
/* set new image size */
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_set_alternate(dev);
em28xx_resolution_set(dev);
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
vidioc_try_fmt_vid_cap(file, priv, f);
if (videobuf_queue_is_busy(&fh->vb_vidq)) {
em28xx_errdev("%s queue busy\n", __func__);
rc = -EBUSY;
goto out;
}
if (dev->stream_on && !fh->stream_on) {
em28xx_errdev("%s device in use by another fh\n", __func__);
rc = -EBUSY;
goto out;
}
rc = em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
f->fmt.pix.width, f->fmt.pix.height);
out:
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
struct v4l2_format f;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
dev->norm = *norm;
/* Adjusts width/height, if needed */
f.fmt.pix.width = dev->width;
f.fmt.pix.height = dev->height;
vidioc_try_fmt_vid_cap(file, priv, &f);
/* set new image size */
dev->width = f.fmt.pix.width;
dev->height = f.fmt.pix.height;
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_resolution_set(dev);
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
mutex_unlock(&dev->lock);
return 0;
}
static const char *iname[] = {
[EM28XX_VMUX_COMPOSITE1] = "Composite1",
[EM28XX_VMUX_COMPOSITE2] = "Composite2",
[EM28XX_VMUX_COMPOSITE3] = "Composite3",
[EM28XX_VMUX_COMPOSITE4] = "Composite4",
[EM28XX_VMUX_SVIDEO] = "S-Video",
[EM28XX_VMUX_TELEVISION] = "Television",
[EM28XX_VMUX_CABLE] = "Cable TV",
[EM28XX_VMUX_DVB] = "DVB",
[EM28XX_VMUX_DEBUG] = "for debug only",
};
static int vidioc_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
unsigned int n;
n = i->index;
if (n >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(n)->type)
return -EINVAL;
i->index = n;
i->type = V4L2_INPUT_TYPE_CAMERA;
strcpy(i->name, iname[INPUT(n)->type]);
if ((EM28XX_VMUX_TELEVISION == INPUT(n)->type) ||
(EM28XX_VMUX_CABLE == INPUT(n)->type))
i->type = V4L2_INPUT_TYPE_TUNER;
i->std = dev->vdev->tvnorms;
return 0;
}
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
*i = dev->ctl_input;
return 0;
}
static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (i >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(i)->type)
return -EINVAL;
dev->ctl_input = i;
mutex_lock(&dev->lock);
video_mux(dev, dev->ctl_input);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
switch (a->index) {
case EM28XX_AMUX_VIDEO:
strcpy(a->name, "Television");
break;
case EM28XX_AMUX_LINE_IN:
strcpy(a->name, "Line In");
break;
case EM28XX_AMUX_VIDEO2:
strcpy(a->name, "Television alt");
break;
case EM28XX_AMUX_PHONE:
strcpy(a->name, "Phone");
break;
case EM28XX_AMUX_MIC:
strcpy(a->name, "Mic");
break;
case EM28XX_AMUX_CD:
strcpy(a->name, "CD");
break;
case EM28XX_AMUX_AUX:
strcpy(a->name, "Aux");
break;
case EM28XX_AMUX_PCM_OUT:
strcpy(a->name, "PCM");
break;
default:
return -EINVAL;
}
a->index = dev->ctl_ainput;
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (a->index >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(a->index)->type)
return -EINVAL;
mutex_lock(&dev->lock);
dev->ctl_ainput = INPUT(a->index)->amux;
dev->ctl_aoutput = INPUT(a->index)->aout;
if (!dev->ctl_aoutput)
dev->ctl_aoutput = EM28XX_AOUT_MASTER;
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int id = qc->id;
int i;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
memset(qc, 0, sizeof(*qc));
qc->id = id;
if (!dev->board.has_msp34xx) {
for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
if (qc->id && qc->id == em28xx_qctrl[i].id) {
memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
return 0;
}
}
}
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, core, queryctrl, qc);
mutex_unlock(&dev->lock);
if (qc->type)
return 0;
else
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
rc = 0;
mutex_lock(&dev->lock);
if (dev->board.has_msp34xx)
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
else {
rc = em28xx_get_ctrl(dev, ctrl);
if (rc < 0) {
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_ctrl, ctrl);
rc = 0;
}
}
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
u8 i;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
if (dev->board.has_msp34xx)
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
else {
rc = 1;
for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
if (ctrl->id == em28xx_qctrl[i].id) {
if (ctrl->value < em28xx_qctrl[i].minimum ||
ctrl->value > em28xx_qctrl[i].maximum) {
rc = -ERANGE;
break;
}
rc = em28xx_set_ctrl(dev, ctrl);
break;
}
}
}
/* Control not found - try to send it to the attached devices */
if (rc == 1) {
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_ctrl, ctrl);
rc = 0;
}
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
strcpy(t->name, "Tuner");
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != t->index)
return -EINVAL;
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
mutex_lock(&dev->lock);
f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
f->frequency = dev->ctl_freq;
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (0 != f->tuner)
return -EINVAL;
if (unlikely(0 == fh->radio && f->type != V4L2_TUNER_ANALOG_TV))
return -EINVAL;
if (unlikely(1 == fh->radio && f->type != V4L2_TUNER_RADIO))
return -EINVAL;
mutex_lock(&dev->lock);
dev->ctl_freq = f->frequency;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
mutex_unlock(&dev->lock);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int em28xx_reg_len(int reg)
{
switch (reg) {
case EM28XX_R40_AC97LSB:
case EM28XX_R30_HSCALELOW:
case EM28XX_R32_VSCALELOW:
return 2;
default:
return 1;
}
}
static int vidioc_g_chip_ident(struct file *file, void *priv,
struct v4l2_dbg_chip_ident *chip)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
chip->ident = V4L2_IDENT_NONE;
chip->revision = 0;
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_chip_ident, chip);
return 0;
}
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int ret;
switch (reg->match.type) {
case V4L2_CHIP_MATCH_AC97:
mutex_lock(&dev->lock);
ret = em28xx_read_ac97(dev, reg->reg);
mutex_unlock(&dev->lock);
if (ret < 0)
return ret;
reg->val = ret;
reg->size = 1;
return 0;
case V4L2_CHIP_MATCH_I2C_DRIVER:
v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg);
return 0;
case V4L2_CHIP_MATCH_I2C_ADDR:
/* Not supported yet */
return -EINVAL;
default:
if (!v4l2_chip_match_host(&reg->match))
return -EINVAL;
}
/* Match host */
reg->size = em28xx_reg_len(reg->reg);
if (reg->size == 1) {
mutex_lock(&dev->lock);
ret = em28xx_read_reg(dev, reg->reg);
mutex_unlock(&dev->lock);
if (ret < 0)
return ret;
reg->val = ret;
} else {
__le16 val = 0;
mutex_lock(&dev->lock);
ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
reg->reg, (char *)&val, 2);
mutex_unlock(&dev->lock);
if (ret < 0)
return ret;
reg->val = le16_to_cpu(val);
}
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
__le16 buf;
int rc;
switch (reg->match.type) {
case V4L2_CHIP_MATCH_AC97:
mutex_lock(&dev->lock);
rc = em28xx_write_ac97(dev, reg->reg, reg->val);
mutex_unlock(&dev->lock);
return rc;
case V4L2_CHIP_MATCH_I2C_DRIVER:
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg);
return 0;
case V4L2_CHIP_MATCH_I2C_ADDR:
/* Not supported yet */
return -EINVAL;
default:
if (!v4l2_chip_match_host(&reg->match))
return -EINVAL;
}
/* Match host */
buf = cpu_to_le16(reg->val);
mutex_lock(&dev->lock);
rc = em28xx_write_regs(dev, reg->reg, (char *)&buf,
em28xx_reg_len(reg->reg));
mutex_unlock(&dev->lock);
return rc;
}
#endif
static int vidioc_cropcap(struct file *file, void *priv,
struct v4l2_cropcap *cc)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (cc->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
cc->bounds.left = 0;
cc->bounds.top = 0;
cc->bounds.width = dev->width;
cc->bounds.height = dev->height;
cc->defrect = cc->bounds;
cc->pixelaspect.numerator = 54; /* 4:3 FIXME: remove magic numbers */
cc->pixelaspect.denominator = 59;
return 0;
}
static int vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
rc = res_get(fh);
if (likely(rc >= 0))
rc = videobuf_streamon(&fh->vb_vidq);
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
if (type != fh->type)
return -EINVAL;
mutex_lock(&dev->lock);
videobuf_streamoff(&fh->vb_vidq);
res_free(fh);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->version = EM28XX_VERSION_CODE;
cap->capabilities =
V4L2_CAP_SLICED_VBI_CAPTURE |
V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_AUDIO |
V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
if (dev->tuner_type != TUNER_ABSENT)
cap->capabilities |= V4L2_CAP_TUNER;
return 0;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (unlikely(f->index >= ARRAY_SIZE(format)))
return -EINVAL;
strlcpy(f->description, format[f->index].name, sizeof(f->description));
f->pixelformat = format[f->index].fourcc;
return 0;
}
/* Sliced VBI ioctls */
static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
f->fmt.sliced.service_set = 0;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
if (f->fmt.sliced.service_set == 0)
rc = -EINVAL;
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, video, g_fmt, f);
mutex_unlock(&dev->lock);
if (f->fmt.sliced.service_set == 0)
return -EINVAL;
return 0;
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *rb)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
return videobuf_reqbufs(&fh->vb_vidq, rb);
}
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
return videobuf_querybuf(&fh->vb_vidq, b);
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
return videobuf_qbuf(&fh->vb_vidq, b);
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
return videobuf_dqbuf(&fh->vb_vidq, b, file->f_flags & O_NONBLOCK);
}
#ifdef CONFIG_VIDEO_V4L1_COMPAT
static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
{
struct em28xx_fh *fh = priv;
return videobuf_cgmbuf(&fh->vb_vidq, mbuf, 8);
}
#endif
/* ----------------------------------------------------------- */
/* RADIO ESPECIFIC IOCTLS */
/* ----------------------------------------------------------- */
static int radio_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
strlcpy(cap->driver, "em28xx", sizeof(cap->driver));
strlcpy(cap->card, em28xx_boards[dev->model].name, sizeof(cap->card));
usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
cap->version = EM28XX_VERSION_CODE;
cap->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int radio_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
if (unlikely(t->index > 0))
return -EINVAL;
strcpy(t->name, "Radio");
t->type = V4L2_TUNER_RADIO;
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
mutex_unlock(&dev->lock);
return 0;
}
static int radio_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
strcpy(i->name, "Radio");
i->type = V4L2_INPUT_TYPE_TUNER;
return 0;
}
static int radio_g_audio(struct file *file, void *priv, struct v4l2_audio *a)
{
if (unlikely(a->index))
return -EINVAL;
strcpy(a->name, "Radio");
return 0;
}
static int radio_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
if (0 != t->index)
return -EINVAL;
mutex_lock(&dev->lock);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
mutex_unlock(&dev->lock);
return 0;
}
static int radio_s_audio(struct file *file, void *fh,
struct v4l2_audio *a)
{
return 0;
}
static int radio_s_input(struct file *file, void *fh, unsigned int i)
{
return 0;
}
static int radio_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
if (qc->id < V4L2_CID_BASE ||
qc->id >= V4L2_CID_LASTP1)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(em28xx_qctrl); i++) {
if (qc->id && qc->id == em28xx_qctrl[i].id) {
memcpy(qc, &(em28xx_qctrl[i]), sizeof(*qc));
return 0;
}
}
return -EINVAL;
}
/*
* em28xx_v4l2_open()
* inits the device and starts isoc transfer
*/
static int em28xx_v4l2_open(struct file *filp)
{
int minor = video_devdata(filp)->minor;
int errCode = 0, radio;
struct em28xx *dev;
enum v4l2_buf_type fh_type;
struct em28xx_fh *fh;
dev = em28xx_get_device(minor, &fh_type, &radio);
if (NULL == dev)
return -ENODEV;
mutex_lock(&dev->lock);
em28xx_videodbg("open minor=%d type=%s users=%d\n",
minor, v4l2_type_names[fh_type], dev->users);
fh = kzalloc(sizeof(struct em28xx_fh), GFP_KERNEL);
if (!fh) {
em28xx_errdev("em28xx-video.c: Out of memory?!\n");
mutex_unlock(&dev->lock);
return -ENOMEM;
}
fh->dev = dev;
fh->radio = radio;
fh->type = fh_type;
filp->private_data = fh;
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE && dev->users == 0) {
em28xx_set_mode(dev, EM28XX_ANALOG_MODE);
em28xx_set_alternate(dev);
em28xx_resolution_set(dev);
/* Needed, since GPIO might have disabled power of
some i2c device
*/
em28xx_wake_i2c(dev);
}
if (fh->radio) {
em28xx_videodbg("video_open: setting radio device\n");
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
}
dev->users++;
videobuf_queue_vmalloc_init(&fh->vb_vidq, &em28xx_video_qops,
NULL, &dev->slock, fh->type, V4L2_FIELD_INTERLACED,
sizeof(struct em28xx_buffer), fh);
mutex_unlock(&dev->lock);
return errCode;
}
/*
* em28xx_realease_resources()
* unregisters the v4l2,i2c and usb devices
* called when the device gets disconected or at module unload
*/
void em28xx_release_analog_resources(struct em28xx *dev)
{
/*FIXME: I2C IR should be disconnected */
if (dev->radio_dev) {
if (-1 != dev->radio_dev->minor)
video_unregister_device(dev->radio_dev);
else
video_device_release(dev->radio_dev);
dev->radio_dev = NULL;
}
if (dev->vbi_dev) {
em28xx_info("V4L2 device /dev/vbi%d deregistered\n",
dev->vbi_dev->num);
if (-1 != dev->vbi_dev->minor)
video_unregister_device(dev->vbi_dev);
else
video_device_release(dev->vbi_dev);
dev->vbi_dev = NULL;
}
if (dev->vdev) {
em28xx_info("V4L2 device /dev/video%d deregistered\n",
dev->vdev->num);
if (-1 != dev->vdev->minor)
video_unregister_device(dev->vdev);
else
video_device_release(dev->vdev);
dev->vdev = NULL;
}
}
/*
* em28xx_v4l2_close()
* stops streaming and deallocates all resources allocated by the v4l2
* calls and ioctls
*/
static int em28xx_v4l2_close(struct file *filp)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int errCode;
em28xx_videodbg("users=%d\n", dev->users);
mutex_lock(&dev->lock);
if (res_check(fh))
res_free(fh);
if (dev->users == 1) {
videobuf_stop(&fh->vb_vidq);
videobuf_mmap_free(&fh->vb_vidq);
/* the device is already disconnect,
free the remaining resources */
if (dev->state & DEV_DISCONNECTED) {
em28xx_release_resources(dev);
mutex_unlock(&dev->lock);
kfree(dev);
return 0;
}
/* Save some power by putting tuner to sleep */
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
/* do this before setting alternate! */
em28xx_uninit_isoc(dev);
em28xx_set_mode(dev, EM28XX_SUSPEND);
/* set alternate 0 */
dev->alt = 0;
em28xx_videodbg("setting alternate 0\n");
errCode = usb_set_interface(dev->udev, 0, 0);
if (errCode < 0) {
em28xx_errdev("cannot change alternate number to "
"0 (error=%i)\n", errCode);
}
}
kfree(fh);
dev->users--;
wake_up_interruptible_nr(&dev->open, 1);
mutex_unlock(&dev->lock);
return 0;
}
/*
* em28xx_v4l2_read()
* will allocate buffers when called for the first time
*/
static ssize_t
em28xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
loff_t *pos)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
/* FIXME: read() is not prepared to allow changing the video
resolution while streaming. Seems a bug at em28xx_set_fmt
*/
if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
mutex_lock(&dev->lock);
rc = res_get(fh);
mutex_unlock(&dev->lock);
if (unlikely(rc < 0))
return rc;
return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
}
return 0;
}
/*
* em28xx_v4l2_poll()
* will allocate buffers when called for the first time
*/
static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table *wait)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
rc = res_get(fh);
mutex_unlock(&dev->lock);
if (unlikely(rc < 0))
return POLLERR;
if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
return POLLERR;
return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
}
/*
* em28xx_v4l2_mmap()
*/
static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
rc = res_get(fh);
mutex_unlock(&dev->lock);
if (unlikely(rc < 0))
return rc;
rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
em28xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
(unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
rc);
return rc;
}
static const struct v4l2_file_operations em28xx_v4l_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.read = em28xx_v4l2_read,
.poll = em28xx_v4l2_poll,
.mmap = em28xx_v4l2_mmap,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops video_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_cropcap = vidioc_cropcap,
.vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap,
.vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
.vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap,
.vidioc_reqbufs = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_s_std = vidioc_s_std,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
.vidioc_g_chip_ident = vidioc_g_chip_ident,
#endif
#ifdef CONFIG_VIDEO_V4L1_COMPAT
.vidiocgmbuf = vidiocgmbuf,
#endif
};
static const struct video_device em28xx_video_template = {
.fops = &em28xx_v4l_fops,
.release = video_device_release,
.ioctl_ops = &video_ioctl_ops,
.minor = -1,
.tvnorms = V4L2_STD_ALL,
.current_norm = V4L2_STD_PAL,
};
static const struct v4l2_file_operations radio_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops radio_ioctl_ops = {
.vidioc_querycap = radio_querycap,
.vidioc_g_tuner = radio_g_tuner,
.vidioc_enum_input = radio_enum_input,
.vidioc_g_audio = radio_g_audio,
.vidioc_s_tuner = radio_s_tuner,
.vidioc_s_audio = radio_s_audio,
.vidioc_s_input = radio_s_input,
.vidioc_queryctrl = radio_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
#endif
};
static struct video_device em28xx_radio_template = {
.name = "em28xx-radio",
.fops = &radio_fops,
.ioctl_ops = &radio_ioctl_ops,
.minor = -1,
};
/******************************** usb interface ******************************/
static struct video_device *em28xx_vdev_init(struct em28xx *dev,
const struct video_device *template,
const char *type_name)
{
struct video_device *vfd;
vfd = video_device_alloc();
if (NULL == vfd)
return NULL;
*vfd = *template;
vfd->minor = -1;
vfd->v4l2_dev = &dev->v4l2_dev;
vfd->release = video_device_release;
vfd->debug = video_debug;
snprintf(vfd->name, sizeof(vfd->name), "%s %s",
dev->name, type_name);
return vfd;
}
int em28xx_register_analog_devices(struct em28xx *dev)
{
u8 val;
int ret;
printk(KERN_INFO "%s: v4l2 driver version %d.%d.%d\n",
dev->name,
(EM28XX_VERSION_CODE >> 16) & 0xff,
(EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
/* set default norm */
dev->norm = em28xx_video_template.current_norm;
dev->interlaced = EM28XX_INTERLACED_DEFAULT;
dev->ctl_input = 0;
/* Analog specific initialization */
dev->format = &format[0];
em28xx_set_video_format(dev, format[0].fourcc,
norm_maxw(dev), norm_maxh(dev));
video_mux(dev, dev->ctl_input);
/* Audio defaults */
dev->mute = 1;
dev->volume = 0x1f;
/* enable vbi capturing */
/* em28xx_write_reg(dev, EM28XX_R0E_AUDIOSRC, 0xc0); audio register */
val = (u8)em28xx_read_reg(dev, EM28XX_R0F_XCLK);
em28xx_write_reg(dev, EM28XX_R0F_XCLK,
(EM28XX_XCLK_AUDIO_UNMUTE | val));
em28xx_write_reg(dev, EM28XX_R11_VINCTRL, 0x51);
em28xx_set_outfmt(dev);
em28xx_colorlevels_set_default(dev);
em28xx_compression_disable(dev);
/* allocate and fill video video_device struct */
dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template, "video");
if (!dev->vdev) {
em28xx_errdev("cannot allocate video_device.\n");
return -ENODEV;
}
/* register v4l2 video video_device */
ret = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
video_nr[dev->devno]);
if (ret) {
em28xx_errdev("unable to register video device (error=%i).\n",
ret);
return ret;
}
/* Allocate and fill vbi video_device struct */
dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template, "vbi");
/* register v4l2 vbi video_device */
ret = video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
vbi_nr[dev->devno]);
if (ret < 0) {
em28xx_errdev("unable to register vbi device\n");
return ret;
}
if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
"radio");
if (!dev->radio_dev) {
em28xx_errdev("cannot allocate video_device.\n");
return -ENODEV;
}
ret = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
radio_nr[dev->devno]);
if (ret < 0) {
em28xx_errdev("can't register radio device\n");
return ret;
}
em28xx_info("Registered radio device as /dev/radio%d\n",
dev->radio_dev->num);
}
em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
dev->vdev->num, dev->vbi_dev->num);
return 0;
}