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linux/drivers/media/usb/em28xx/em28xx-video.c
Frank Schaefer 032f1ddf67 [media] em28xx: fix error path in em28xx_start_analog_streaming() 
Increase the streaming_users count only if streaming start succeeds.

Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
2013-10-17 06:07:36 -03:00

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52 KiB
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/*
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>
Copyright (C) 2012 Frank Schäfer <fschaefer.oss@googlemail.com>
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/mm.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include "em28xx.h"
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.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 "0.2.0"
#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");
MODULE_VERSION(EM28XX_VERSION);
#define EM25XX_FRMDATAHDR_BYTE1 0x02
#define EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE 0x20
#define EM25XX_FRMDATAHDR_BYTE2_FRAME_END 0x02
#define EM25XX_FRMDATAHDR_BYTE2_FRAME_ID 0x01
#define EM25XX_FRMDATAHDR_BYTE2_MASK (EM25XX_FRMDATAHDR_BYTE2_STILL_IMAGE | \
EM25XX_FRMDATAHDR_BYTE2_FRAME_END | \
EM25XX_FRMDATAHDR_BYTE2_FRAME_ID)
static unsigned int video_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
static unsigned int vbi_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
static unsigned int radio_nr[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = -1U };
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,
},
};
/* ------------------------------------------------------------------
DMA and thread functions
------------------------------------------------------------------*/
/*
* Finish the current buffer
*/
static inline void finish_buffer(struct em28xx *dev,
struct em28xx_buffer *buf)
{
em28xx_isocdbg("[%p/%d] wakeup\n", buf, buf->top_field);
buf->vb.v4l2_buf.sequence = dev->field_count++;
buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
}
/*
* Copy picture data from USB buffer to videobuf buffer
*/
static void em28xx_copy_video(struct em28xx *dev,
struct em28xx_buffer *buf,
unsigned char *usb_buf,
unsigned long len)
{
void *fieldstart, *startwrite, *startread;
int linesdone, currlinedone, offset, lencopy, remain;
int bytesperline = dev->width << 1;
if (buf->pos + len > buf->length)
len = buf->length - buf->pos;
startread = usb_buf;
remain = len;
if (dev->progressive || buf->top_field)
fieldstart = buf->vb_buf;
else /* interlaced mode, even nr. of lines */
fieldstart = buf->vb_buf + bytesperline;
linesdone = buf->pos / bytesperline;
currlinedone = buf->pos % bytesperline;
if (dev->progressive)
offset = linesdone * bytesperline + currlinedone;
else
offset = linesdone * bytesperline * 2 + currlinedone;
startwrite = fieldstart + offset;
lencopy = bytesperline - currlinedone;
lencopy = lencopy > remain ? remain : lencopy;
if ((char *)startwrite + lencopy > (char *)buf->vb_buf + buf->length) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end (1)\n",
((char *)startwrite + lencopy) -
((char *)buf->vb_buf + buf->length));
remain = (char *)buf->vb_buf + buf->length -
(char *)startwrite;
lencopy = remain;
}
if (lencopy <= 0)
return;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
while (remain > 0) {
if (dev->progressive)
startwrite += lencopy;
else
startwrite += lencopy + bytesperline;
startread += lencopy;
if (bytesperline > remain)
lencopy = remain;
else
lencopy = bytesperline;
if ((char *)startwrite + lencopy > (char *)buf->vb_buf +
buf->length) {
em28xx_isocdbg("Overflow of %zi bytes past buffer end"
"(2)\n",
((char *)startwrite + lencopy) -
((char *)buf->vb_buf + buf->length));
lencopy = remain = (char *)buf->vb_buf + buf->length -
(char *)startwrite;
}
if (lencopy <= 0)
break;
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
}
buf->pos += len;
}
/*
* Copy VBI data from USB buffer to videobuf buffer
*/
static void em28xx_copy_vbi(struct em28xx *dev,
struct em28xx_buffer *buf,
unsigned char *usb_buf,
unsigned long len)
{
unsigned int offset;
if (buf->pos + len > buf->length)
len = buf->length - buf->pos;
offset = buf->pos;
/* Make sure the bottom field populates the second half of the frame */
if (buf->top_field == 0)
offset += dev->vbi_width * dev->vbi_height;
memcpy(buf->vb_buf + offset, usb_buf, len);
buf->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);
}
}
/*
* get the next available buffer from dma queue
*/
static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
struct em28xx_dmaqueue *dma_q)
{
struct em28xx_buffer *buf;
if (list_empty(&dma_q->active)) {
em28xx_isocdbg("No active queue to serve\n");
return NULL;
}
/* Get the next buffer */
buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
/* Cleans up buffer - Useful for testing for frame/URB loss */
list_del(&buf->list);
buf->pos = 0;
buf->vb_buf = buf->mem;
return buf;
}
/*
* Finish the current buffer if completed and prepare for the next field
*/
static struct em28xx_buffer *
finish_field_prepare_next(struct em28xx *dev,
struct em28xx_buffer *buf,
struct em28xx_dmaqueue *dma_q)
{
if (dev->progressive || dev->top_field) { /* Brand new frame */
if (buf != NULL)
finish_buffer(dev, buf);
buf = get_next_buf(dev, dma_q);
}
if (buf != NULL) {
buf->top_field = dev->top_field;
buf->pos = 0;
}
return buf;
}
/*
* Process data packet according to the em2710/em2750/em28xx frame data format
*/
static inline void process_frame_data_em28xx(struct em28xx *dev,
unsigned char *data_pkt,
unsigned int data_len)
{
struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
struct em28xx_buffer *vbi_buf = dev->usb_ctl.vbi_buf;
struct em28xx_dmaqueue *dma_q = &dev->vidq;
struct em28xx_dmaqueue *vbi_dma_q = &dev->vbiq;
/* capture type 0 = vbi start
capture type 1 = vbi in progress
capture type 2 = video start
capture type 3 = video in progress */
if (data_len >= 4) {
/* NOTE: Headers are always 4 bytes and
* never split across packets */
if (data_pkt[0] == 0x88 && data_pkt[1] == 0x88 &&
data_pkt[2] == 0x88 && data_pkt[3] == 0x88) {
/* Continuation */
data_pkt += 4;
data_len -= 4;
} else if (data_pkt[0] == 0x33 && data_pkt[1] == 0x95) {
/* Field start (VBI mode) */
dev->capture_type = 0;
dev->vbi_read = 0;
em28xx_isocdbg("VBI START HEADER !!!\n");
dev->top_field = !(data_pkt[2] & 1);
data_pkt += 4;
data_len -= 4;
} else if (data_pkt[0] == 0x22 && data_pkt[1] == 0x5a) {
/* Field start (VBI disabled) */
dev->capture_type = 2;
em28xx_isocdbg("VIDEO START HEADER !!!\n");
dev->top_field = !(data_pkt[2] & 1);
data_pkt += 4;
data_len -= 4;
}
}
/* NOTE: With bulk transfers, intermediate data packets
* have no continuation header */
if (dev->capture_type == 0) {
vbi_buf = finish_field_prepare_next(dev, vbi_buf, vbi_dma_q);
dev->usb_ctl.vbi_buf = vbi_buf;
dev->capture_type = 1;
}
if (dev->capture_type == 1) {
int vbi_size = dev->vbi_width * dev->vbi_height;
int vbi_data_len = ((dev->vbi_read + data_len) > vbi_size) ?
(vbi_size - dev->vbi_read) : data_len;
/* Copy VBI data */
if (vbi_buf != NULL)
em28xx_copy_vbi(dev, vbi_buf, data_pkt, vbi_data_len);
dev->vbi_read += vbi_data_len;
if (vbi_data_len < data_len) {
/* Continue with copying video data */
dev->capture_type = 2;
data_pkt += vbi_data_len;
data_len -= vbi_data_len;
}
}
if (dev->capture_type == 2) {
buf = finish_field_prepare_next(dev, buf, dma_q);
dev->usb_ctl.vid_buf = buf;
dev->capture_type = 3;
}
if (dev->capture_type == 3 && buf != NULL && data_len > 0)
em28xx_copy_video(dev, buf, data_pkt, data_len);
}
/*
* Process data packet according to the em25xx/em276x/7x/8x frame data format
*/
static inline void process_frame_data_em25xx(struct em28xx *dev,
unsigned char *data_pkt,
unsigned int data_len)
{
struct em28xx_buffer *buf = dev->usb_ctl.vid_buf;
struct em28xx_dmaqueue *dmaq = &dev->vidq;
bool frame_end = 0;
/* Check for header */
/* NOTE: at least with bulk transfers, only the first packet
* has a header and has always set the FRAME_END bit */
if (data_len >= 2) { /* em25xx header is only 2 bytes long */
if ((data_pkt[0] == EM25XX_FRMDATAHDR_BYTE1) &&
((data_pkt[1] & ~EM25XX_FRMDATAHDR_BYTE2_MASK) == 0x00)) {
dev->top_field = !(data_pkt[1] &
EM25XX_FRMDATAHDR_BYTE2_FRAME_ID);
frame_end = data_pkt[1] &
EM25XX_FRMDATAHDR_BYTE2_FRAME_END;
data_pkt += 2;
data_len -= 2;
}
/* Finish field and prepare next (BULK only) */
if (dev->analog_xfer_bulk && frame_end) {
buf = finish_field_prepare_next(dev, buf, dmaq);
dev->usb_ctl.vid_buf = buf;
}
/* NOTE: in ISOC mode when a new frame starts and buf==NULL,
* we COULD already prepare a buffer here to avoid skipping the
* first frame.
*/
}
/* Copy data */
if (buf != NULL && data_len > 0)
em28xx_copy_video(dev, buf, data_pkt, data_len);
/* Finish frame (ISOC only) => avoids lag of 1 frame */
if (!dev->analog_xfer_bulk && frame_end) {
buf = finish_field_prepare_next(dev, buf, dmaq);
dev->usb_ctl.vid_buf = buf;
}
/* NOTE: Tested with USB bulk transfers only !
* The wording in the datasheet suggests that isoc might work different.
* The current code assumes that with isoc transfers each packet has a
* header like with the other em28xx devices.
*/
/* NOTE: Support for interlaced mode is pure theory. It has not been
* tested and it is unknown if these devices actually support it. */
/* NOTE: No VBI support yet (these chips likely do not support VBI). */
}
/* Processes and copies the URB data content (video and VBI data) */
static inline int em28xx_urb_data_copy(struct em28xx *dev, struct urb *urb)
{
int xfer_bulk, num_packets, i;
unsigned char *usb_data_pkt;
unsigned int usb_data_len;
if (!dev)
return 0;
if (dev->disconnected)
return 0;
if (urb->status < 0)
print_err_status(dev, -1, urb->status);
xfer_bulk = usb_pipebulk(urb->pipe);
if (xfer_bulk) /* bulk */
num_packets = 1;
else /* isoc */
num_packets = urb->number_of_packets;
for (i = 0; i < num_packets; i++) {
if (xfer_bulk) { /* bulk */
usb_data_len = urb->actual_length;
usb_data_pkt = urb->transfer_buffer;
} else { /* isoc */
if (urb->iso_frame_desc[i].status < 0) {
print_err_status(dev, i,
urb->iso_frame_desc[i].status);
if (urb->iso_frame_desc[i].status != -EPROTO)
continue;
}
usb_data_len = urb->iso_frame_desc[i].actual_length;
if (usb_data_len > dev->max_pkt_size) {
em28xx_isocdbg("packet bigger than packet size");
continue;
}
usb_data_pkt = urb->transfer_buffer +
urb->iso_frame_desc[i].offset;
}
if (usb_data_len == 0) {
/* NOTE: happens very often with isoc transfers */
/* em28xx_usbdbg("packet %d is empty",i); - spammy */
continue;
}
if (dev->is_em25xx)
process_frame_data_em25xx(dev,
usb_data_pkt, usb_data_len);
else
process_frame_data_em28xx(dev,
usb_data_pkt, usb_data_len);
}
return 1;
}
static int get_ressource(enum v4l2_buf_type f_type)
{
switch (f_type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return EM28XX_RESOURCE_VIDEO;
case V4L2_BUF_TYPE_VBI_CAPTURE:
return EM28XX_RESOURCE_VBI;
default:
BUG();
return 0;
}
}
/* Usage lock check functions */
static int res_get(struct em28xx *dev, enum v4l2_buf_type f_type)
{
int res_type = get_ressource(f_type);
/* is it free? */
if (dev->resources & res_type) {
/* no, someone else uses it */
return -EBUSY;
}
/* it's free, grab it */
dev->resources |= res_type;
em28xx_videodbg("res: get %d\n", res_type);
return 0;
}
static void res_free(struct em28xx *dev, enum v4l2_buf_type f_type)
{
int res_type = get_ressource(f_type);
dev->resources &= ~res_type;
em28xx_videodbg("res: put %d\n", res_type);
}
/* ------------------------------------------------------------------
Videobuf2 operations
------------------------------------------------------------------*/
static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct em28xx *dev = vb2_get_drv_priv(vq);
unsigned long size;
if (fmt)
size = fmt->fmt.pix.sizeimage;
else
size = (dev->width * dev->height * dev->format->depth + 7) >> 3;
if (size == 0)
return -EINVAL;
if (0 == *nbuffers)
*nbuffers = 32;
*nplanes = 1;
sizes[0] = size;
return 0;
}
static int
buffer_prepare(struct vb2_buffer *vb)
{
struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
unsigned long size;
em28xx_videodbg("%s, field=%d\n", __func__, vb->v4l2_buf.field);
size = (dev->width * dev->height * dev->format->depth + 7) >> 3;
if (vb2_plane_size(vb, 0) < size) {
em28xx_videodbg("%s data will not fit into plane (%lu < %lu)\n",
__func__, vb2_plane_size(vb, 0), size);
return -EINVAL;
}
vb2_set_plane_payload(&buf->vb, 0, size);
return 0;
}
int em28xx_start_analog_streaming(struct vb2_queue *vq, unsigned int count)
{
struct em28xx *dev = vb2_get_drv_priv(vq);
struct v4l2_frequency f;
int rc = 0;
em28xx_videodbg("%s\n", __func__);
/* Make sure streaming is not already in progress for this type
of filehandle (e.g. video, vbi) */
rc = res_get(dev, vq->type);
if (rc)
return rc;
if (dev->streaming_users == 0) {
/* First active streaming user, so allocate all the URBs */
/* Allocate the USB bandwidth */
em28xx_set_alternate(dev);
/* Needed, since GPIO might have disabled power of
some i2c device
*/
em28xx_wake_i2c(dev);
dev->capture_type = -1;
rc = em28xx_init_usb_xfer(dev, EM28XX_ANALOG_MODE,
dev->analog_xfer_bulk,
EM28XX_NUM_BUFS,
dev->max_pkt_size,
dev->packet_multiplier,
em28xx_urb_data_copy);
if (rc < 0)
return rc;
/*
* djh: it's not clear whether this code is still needed. I'm
* leaving it in here for now entirely out of concern for
* backward compatibility (the old code did it)
*/
/* Ask tuner to go to analog or radio mode */
memset(&f, 0, sizeof(f));
f.frequency = dev->ctl_freq;
if (vq->owner && vq->owner->vdev->vfl_type == VFL_TYPE_RADIO)
f.type = V4L2_TUNER_RADIO;
else
f.type = V4L2_TUNER_ANALOG_TV;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, &f);
}
dev->streaming_users++;
return rc;
}
static int em28xx_stop_streaming(struct vb2_queue *vq)
{
struct em28xx *dev = vb2_get_drv_priv(vq);
struct em28xx_dmaqueue *vidq = &dev->vidq;
unsigned long flags = 0;
em28xx_videodbg("%s\n", __func__);
res_free(dev, vq->type);
if (dev->streaming_users-- == 1) {
/* Last active user, so shutdown all the URBS */
em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
}
spin_lock_irqsave(&dev->slock, flags);
while (!list_empty(&vidq->active)) {
struct em28xx_buffer *buf;
buf = list_entry(vidq->active.next, struct em28xx_buffer, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
dev->usb_ctl.vid_buf = NULL;
spin_unlock_irqrestore(&dev->slock, flags);
return 0;
}
int em28xx_stop_vbi_streaming(struct vb2_queue *vq)
{
struct em28xx *dev = vb2_get_drv_priv(vq);
struct em28xx_dmaqueue *vbiq = &dev->vbiq;
unsigned long flags = 0;
em28xx_videodbg("%s\n", __func__);
res_free(dev, vq->type);
if (dev->streaming_users-- == 1) {
/* Last active user, so shutdown all the URBS */
em28xx_uninit_usb_xfer(dev, EM28XX_ANALOG_MODE);
}
spin_lock_irqsave(&dev->slock, flags);
while (!list_empty(&vbiq->active)) {
struct em28xx_buffer *buf;
buf = list_entry(vbiq->active.next, struct em28xx_buffer, list);
list_del(&buf->list);
vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
}
dev->usb_ctl.vbi_buf = NULL;
spin_unlock_irqrestore(&dev->slock, flags);
return 0;
}
static void
buffer_queue(struct vb2_buffer *vb)
{
struct em28xx *dev = vb2_get_drv_priv(vb->vb2_queue);
struct em28xx_buffer *buf = container_of(vb, struct em28xx_buffer, vb);
struct em28xx_dmaqueue *vidq = &dev->vidq;
unsigned long flags = 0;
em28xx_videodbg("%s\n", __func__);
buf->mem = vb2_plane_vaddr(vb, 0);
buf->length = vb2_plane_size(vb, 0);
spin_lock_irqsave(&dev->slock, flags);
list_add_tail(&buf->list, &vidq->active);
spin_unlock_irqrestore(&dev->slock, flags);
}
static struct vb2_ops em28xx_video_qops = {
.queue_setup = queue_setup,
.buf_prepare = buffer_prepare,
.buf_queue = buffer_queue,
.start_streaming = em28xx_start_analog_streaming,
.stop_streaming = em28xx_stop_streaming,
.wait_prepare = vb2_ops_wait_prepare,
.wait_finish = vb2_ops_wait_finish,
};
int em28xx_vb2_setup(struct em28xx *dev)
{
int rc;
struct vb2_queue *q;
/* Setup Videobuf2 for Video capture */
q = &dev->vb_vidq;
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF;
q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->drv_priv = dev;
q->buf_struct_size = sizeof(struct em28xx_buffer);
q->ops = &em28xx_video_qops;
q->mem_ops = &vb2_vmalloc_memops;
rc = vb2_queue_init(q);
if (rc < 0)
return rc;
/* Setup Videobuf2 for VBI capture */
q = &dev->vb_vbiq;
q->type = V4L2_BUF_TYPE_VBI_CAPTURE;
q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
q->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
q->drv_priv = dev;
q->buf_struct_size = sizeof(struct em28xx_buffer);
q->ops = &em28xx_vbi_qops;
q->mem_ops = &vb2_vmalloc_memops;
rc = vb2_queue_init(q);
if (rc < 0)
return rc;
return 0;
}
/********************* 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);
}
void em28xx_ctrl_notify(struct v4l2_ctrl *ctrl, void *priv)
{
struct em28xx *dev = priv;
/*
* In the case of non-AC97 volume controls, we still need
* to do some setups at em28xx, in order to mute/unmute
* and to adjust audio volume. However, the value ranges
* should be checked by the corresponding V4L subdriver.
*/
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
dev->mute = ctrl->val;
em28xx_audio_analog_set(dev);
break;
case V4L2_CID_AUDIO_VOLUME:
dev->volume = ctrl->val;
em28xx_audio_analog_set(dev);
break;
}
}
static int em28xx_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct em28xx *dev = container_of(ctrl->handler, struct em28xx, ctrl_handler);
int ret = -EINVAL;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
dev->mute = ctrl->val;
ret = em28xx_audio_analog_set(dev);
break;
case V4L2_CID_AUDIO_VOLUME:
dev->volume = ctrl->val;
ret = em28xx_audio_analog_set(dev);
break;
case V4L2_CID_CONTRAST:
ret = em28xx_write_reg(dev, EM28XX_R20_YGAIN, ctrl->val);
break;
case V4L2_CID_BRIGHTNESS:
ret = em28xx_write_reg(dev, EM28XX_R21_YOFFSET, ctrl->val);
break;
case V4L2_CID_SATURATION:
ret = em28xx_write_reg(dev, EM28XX_R22_UVGAIN, ctrl->val);
break;
case V4L2_CID_BLUE_BALANCE:
ret = em28xx_write_reg(dev, EM28XX_R23_UOFFSET, ctrl->val);
break;
case V4L2_CID_RED_BALANCE:
ret = em28xx_write_reg(dev, EM28XX_R24_VOFFSET, ctrl->val);
break;
case V4L2_CID_SHARPNESS:
ret = em28xx_write_reg(dev, EM28XX_R25_SHARPNESS, ctrl->val);
break;
}
return (ret < 0) ? ret : 0;
}
const struct v4l2_ctrl_ops em28xx_ctrl_ops = {
.s_ctrl = em28xx_s_ctrl,
};
static void size_to_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 > EM28XX_HVSCALE_MAX)
*hscale = EM28XX_HVSCALE_MAX;
*vscale = (((unsigned long)maxh) << 12) / height - 4096L;
if (*vscale > EM28XX_HVSCALE_MAX)
*vscale = EM28XX_HVSCALE_MAX;
}
static void scale_to_size(struct em28xx *dev,
unsigned int hscale, unsigned int vscale,
unsigned int *width, unsigned int *height)
{
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
*width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
*height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
}
/* ------------------------------------------------------------------
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;
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? */
if (dev->progressive)
f->fmt.pix.field = V4L2_FIELD_NONE;
else
f->fmt.pix.field = dev->interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
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_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;
/*
* MaxPacketSize for em2800 is too small to capture at full
* resolution use half of maxw as the scaler can only scale
* to 50%
*/
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);
}
size_to_scale(dev, width, height, &hscale, &vscale);
scale_to_size(dev, hscale, vscale, &width, &height);
f->fmt.pix.width = width;
f->fmt.pix.height = height;
f->fmt.pix.pixelformat = fmt->fourcc;
f->fmt.pix.bytesperline = (width * fmt->depth + 7) >> 3;
f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
if (dev->progressive)
f->fmt.pix.field = V4L2_FIELD_NONE;
else
f->fmt.pix.field = dev->interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
f->fmt.pix.priv = 0;
return 0;
}
static int em28xx_set_video_format(struct em28xx *dev, unsigned int fourcc,
unsigned width, unsigned height)
{
struct em28xx_fmt *fmt;
fmt = format_by_fourcc(fourcc);
if (!fmt)
return -EINVAL;
dev->format = fmt;
dev->width = width;
dev->height = height;
/* set new image size */
size_to_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_resolution_set(dev);
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx *dev = video_drvdata(file);
if (dev->streaming_users > 0)
return -EBUSY;
vidioc_try_fmt_vid_cap(file, priv, f);
return em28xx_set_video_format(dev, f->fmt.pix.pixelformat,
f->fmt.pix.width, f->fmt.pix.height);
}
static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
*norm = dev->norm;
return 0;
}
static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm);
return 0;
}
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;
if (norm == dev->norm)
return 0;
if (dev->streaming_users > 0)
return -EBUSY;
dev->norm = norm;
/* Adjusts width/height, if needed */
f.fmt.pix.width = 720;
f.fmt.pix.height = (norm & V4L2_STD_525_60) ? 480 : 576;
vidioc_try_fmt_vid_cap(file, priv, &f);
/* set new image size */
dev->width = f.fmt.pix.width;
dev->height = f.fmt.pix.height;
size_to_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);
return 0;
}
static int vidioc_g_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int rc = 0;
p->parm.capture.readbuffers = EM28XX_MIN_BUF;
if (dev->board.is_webcam)
rc = v4l2_device_call_until_err(&dev->v4l2_dev, 0,
video, g_parm, p);
else
v4l2_video_std_frame_period(dev->norm,
&p->parm.capture.timeperframe);
return rc;
}
static int vidioc_s_parm(struct file *file, void *priv,
struct v4l2_streamparm *p)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
p->parm.capture.readbuffers = EM28XX_MIN_BUF;
return v4l2_device_call_until_err(&dev->v4l2_dev, 0, video, s_parm, p);
}
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;
/* webcams do not have the STD API */
if (dev->board.is_webcam)
i->capabilities = 0;
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;
if (i >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(i)->type)
return -EINVAL;
video_mux(dev, i);
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, const 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;
dev->ctl_ainput = INPUT(a->index)->amux;
dev->ctl_aoutput = INPUT(a->index)->aout;
if (!dev->ctl_aoutput)
dev->ctl_aoutput = EM28XX_AOUT_MASTER;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (0 != t->index)
return -EINVAL;
strcpy(t->name, "Tuner");
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (0 != t->index)
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
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;
if (0 != f->tuner)
return -EINVAL;
f->frequency = dev->ctl_freq;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct v4l2_frequency new_freq = *f;
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (0 != f->tuner)
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_frequency, f);
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_frequency, &new_freq);
dev->ctl_freq = new_freq.frequency;
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int vidioc_g_chip_info(struct file *file, void *priv,
struct v4l2_dbg_chip_info *chip)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
if (chip->match.addr > 1)
return -EINVAL;
if (chip->match.addr == 1)
strlcpy(chip->name, "ac97", sizeof(chip->name));
else
strlcpy(chip->name, dev->v4l2_dev.name, sizeof(chip->name));
return 0;
}
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_register(struct file *file, void *priv,
struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int ret;
if (reg->match.addr > 1)
return -EINVAL;
if (reg->match.addr) {
ret = em28xx_read_ac97(dev, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
reg->size = 1;
return 0;
}
/* Match host */
reg->size = em28xx_reg_len(reg->reg);
if (reg->size == 1) {
ret = em28xx_read_reg(dev, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
} else {
__le16 val = 0;
ret = em28xx_read_reg_req_len(dev, USB_REQ_GET_STATUS,
reg->reg, (char *)&val, 2);
if (ret < 0)
return ret;
reg->val = le16_to_cpu(val);
}
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
const struct v4l2_dbg_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
__le16 buf;
if (reg->match.addr > 1)
return -EINVAL;
if (reg->match.addr)
return em28xx_write_ac97(dev, reg->reg, reg->val);
/* Match host */
buf = cpu_to_le16(reg->val);
return em28xx_write_regs(dev, reg->reg, (char *)&buf,
em28xx_reg_len(reg->reg));
}
#endif
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct video_device *vdev = video_devdata(file);
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));
if (vdev->vfl_type == VFL_TYPE_GRABBER)
cap->device_caps = V4L2_CAP_READWRITE |
V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
else if (vdev->vfl_type == VFL_TYPE_RADIO)
cap->device_caps = V4L2_CAP_RADIO;
else
cap->device_caps = V4L2_CAP_READWRITE | V4L2_CAP_VBI_CAPTURE;
if (dev->audio_mode.has_audio)
cap->device_caps |= V4L2_CAP_AUDIO;
if (dev->tuner_type != TUNER_ABSENT)
cap->device_caps |= V4L2_CAP_TUNER;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS |
V4L2_CAP_READWRITE | V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
if (dev->vbi_dev)
cap->capabilities |= V4L2_CAP_VBI_CAPTURE;
if (dev->radio_dev)
cap->capabilities |= V4L2_CAP_RADIO;
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;
}
static int vidioc_enum_framesizes(struct file *file, void *priv,
struct v4l2_frmsizeenum *fsize)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
struct em28xx_fmt *fmt;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
fmt = format_by_fourcc(fsize->pixel_format);
if (!fmt) {
em28xx_videodbg("Fourcc format (%08x) invalid.\n",
fsize->pixel_format);
return -EINVAL;
}
if (dev->board.is_em2800) {
if (fsize->index > 1)
return -EINVAL;
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
fsize->discrete.width = maxw / (1 + fsize->index);
fsize->discrete.height = maxh / (1 + fsize->index);
return 0;
}
if (fsize->index != 0)
return -EINVAL;
/* Report a continuous range */
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
&fsize->stepwise.min_width, &fsize->stepwise.min_height);
if (fsize->stepwise.min_width < 48)
fsize->stepwise.min_width = 48;
if (fsize->stepwise.min_height < 38)
fsize->stepwise.min_height = 38;
fsize->stepwise.max_width = maxw;
fsize->stepwise.max_height = maxh;
fsize->stepwise.step_width = 1;
fsize->stepwise.step_height = 1;
return 0;
}
/* RAW VBI ioctls */
static int vidioc_g_fmt_vbi_cap(struct file *file, void *priv,
struct v4l2_format *format)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
format->fmt.vbi.samples_per_line = dev->vbi_width;
format->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
format->fmt.vbi.offset = 0;
format->fmt.vbi.flags = 0;
format->fmt.vbi.sampling_rate = 6750000 * 4 / 2;
format->fmt.vbi.count[0] = dev->vbi_height;
format->fmt.vbi.count[1] = dev->vbi_height;
memset(format->fmt.vbi.reserved, 0, sizeof(format->fmt.vbi.reserved));
/* Varies by video standard (NTSC, PAL, etc.) */
if (dev->norm & V4L2_STD_525_60) {
/* NTSC */
format->fmt.vbi.start[0] = 10;
format->fmt.vbi.start[1] = 273;
} else if (dev->norm & V4L2_STD_625_50) {
/* PAL */
format->fmt.vbi.start[0] = 6;
format->fmt.vbi.start[1] = 318;
}
return 0;
}
/* ----------------------------------------------------------- */
/* RADIO ESPECIFIC IOCTLS */
/* ----------------------------------------------------------- */
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");
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, g_tuner, t);
return 0;
}
static int radio_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *t)
{
struct em28xx *dev = ((struct em28xx_fh *)priv)->dev;
if (0 != t->index)
return -EINVAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_tuner, t);
return 0;
}
/*
* em28xx_v4l2_open()
* inits the device and starts isoc transfer
*/
static int em28xx_v4l2_open(struct file *filp)
{
struct video_device *vdev = video_devdata(filp);
struct em28xx *dev = video_drvdata(filp);
enum v4l2_buf_type fh_type = 0;
struct em28xx_fh *fh;
switch (vdev->vfl_type) {
case VFL_TYPE_GRABBER:
fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
break;
case VFL_TYPE_VBI:
fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
break;
}
em28xx_videodbg("open dev=%s type=%s users=%d\n",
video_device_node_name(vdev), v4l2_type_names[fh_type],
dev->users);
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
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;
}
v4l2_fh_init(&fh->fh, vdev);
fh->dev = dev;
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_resolution_set(dev);
/* Needed, since GPIO might have disabled power of
some i2c device
*/
em28xx_wake_i2c(dev);
}
if (vdev->vfl_type == VFL_TYPE_RADIO) {
em28xx_videodbg("video_open: setting radio device\n");
v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_radio);
}
dev->users++;
mutex_unlock(&dev->lock);
v4l2_fh_add(&fh->fh);
return 0;
}
/*
* 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 (video_is_registered(dev->radio_dev))
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 %s deregistered\n",
video_device_node_name(dev->vbi_dev));
if (video_is_registered(dev->vbi_dev))
video_unregister_device(dev->vbi_dev);
else
video_device_release(dev->vbi_dev);
dev->vbi_dev = NULL;
}
if (dev->vdev) {
em28xx_info("V4L2 device %s deregistered\n",
video_device_node_name(dev->vdev));
if (video_is_registered(dev->vdev))
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);
vb2_fop_release(filp);
if (dev->users == 1) {
/* the device is already disconnect,
free the remaining resources */
if (dev->disconnected) {
em28xx_release_resources(dev);
kfree(dev->alt_max_pkt_size_isoc);
mutex_unlock(&dev->lock);
kfree(dev);
return 0;
}
/* Save some power by putting tuner to sleep */
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
/* do this before setting alternate! */
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);
}
}
dev->users--;
mutex_unlock(&dev->lock);
return 0;
}
static const struct v4l2_file_operations em28xx_v4l_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.read = vb2_fop_read,
.poll = vb2_fop_poll,
.mmap = vb2_fop_mmap,
.unlocked_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_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_try_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_s_fmt_vbi_cap = vidioc_g_fmt_vbi_cap,
.vidioc_enum_framesizes = vidioc_enum_framesizes,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_reqbufs = vb2_ioctl_reqbufs,
.vidioc_create_bufs = vb2_ioctl_create_bufs,
.vidioc_prepare_buf = vb2_ioctl_prepare_buf,
.vidioc_querybuf = vb2_ioctl_querybuf,
.vidioc_qbuf = vb2_ioctl_qbuf,
.vidioc_dqbuf = vb2_ioctl_dqbuf,
.vidioc_g_std = vidioc_g_std,
.vidioc_querystd = vidioc_querystd,
.vidioc_s_std = vidioc_s_std,
.vidioc_g_parm = vidioc_g_parm,
.vidioc_s_parm = vidioc_s_parm,
.vidioc_enum_input = vidioc_enum_input,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_streamon = vb2_ioctl_streamon,
.vidioc_streamoff = vb2_ioctl_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,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_chip_info = vidioc_g_chip_info,
.vidioc_g_register = vidioc_g_register,
.vidioc_s_register = vidioc_s_register,
#endif
};
static const struct video_device em28xx_video_template = {
.fops = &em28xx_v4l_fops,
.release = video_device_release_empty,
.ioctl_ops = &video_ioctl_ops,
.tvnorms = V4L2_STD_ALL,
};
static const struct v4l2_file_operations radio_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops radio_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_g_tuner = radio_g_tuner,
.vidioc_s_tuner = radio_s_tuner,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
#ifdef CONFIG_VIDEO_ADV_DEBUG
.vidioc_g_chip_info = vidioc_g_chip_info,
.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,
};
/******************************** 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->v4l2_dev = &dev->v4l2_dev;
vfd->debug = video_debug;
vfd->lock = &dev->lock;
set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
if (dev->board.is_webcam)
vfd->tvnorms = 0;
snprintf(vfd->name, sizeof(vfd->name), "%s %s",
dev->name, type_name);
video_set_drvdata(vfd, dev);
return vfd;
}
int em28xx_register_analog_devices(struct em28xx *dev)
{
u8 val;
int ret;
unsigned int maxw;
printk(KERN_INFO "%s: v4l2 driver version %s\n",
dev->name, EM28XX_VERSION);
/* set default norm */
dev->norm = V4L2_STD_PAL;
v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_std, dev->norm);
dev->interlaced = EM28XX_INTERLACED_DEFAULT;
/* Analog specific initialization */
dev->format = &format[0];
maxw = norm_maxw(dev);
/* MaxPacketSize for em2800 is too small to capture at full resolution
* use half of maxw as the scaler can only scale to 50% */
if (dev->board.is_em2800)
maxw /= 2;
em28xx_set_video_format(dev, format[0].fourcc,
maxw, norm_maxh(dev));
video_mux(dev, 0);
/* Audio defaults */
dev->mute = 1;
dev->volume = 0x1f;
/* 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_set_outfmt(dev);
em28xx_compression_disable(dev);
/* Add image controls */
/* NOTE: at this point, the subdevices are already registered, so bridge
* controls are only added/enabled when no subdevice provides them */
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_CONTRAST))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_CONTRAST,
0, 0x1f, 1, CONTRAST_DEFAULT);
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BRIGHTNESS))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_BRIGHTNESS,
-0x80, 0x7f, 1, BRIGHTNESS_DEFAULT);
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SATURATION))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_SATURATION,
0, 0x1f, 1, SATURATION_DEFAULT);
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_BLUE_BALANCE))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_BLUE_BALANCE,
-0x30, 0x30, 1, BLUE_BALANCE_DEFAULT);
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_RED_BALANCE))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_RED_BALANCE,
-0x30, 0x30, 1, RED_BALANCE_DEFAULT);
if (NULL == v4l2_ctrl_find(&dev->ctrl_handler, V4L2_CID_SHARPNESS))
v4l2_ctrl_new_std(&dev->ctrl_handler, &em28xx_ctrl_ops,
V4L2_CID_SHARPNESS,
0, 0x0f, 1, SHARPNESS_DEFAULT);
/* Reset image controls */
em28xx_colorlevels_set_default(dev);
v4l2_ctrl_handler_setup(&dev->ctrl_handler);
if (dev->ctrl_handler.error)
return dev->ctrl_handler.error;
/* 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;
}
dev->vdev->queue = &dev->vb_vidq;
dev->vdev->queue->lock = &dev->vb_queue_lock;
/* disable inapplicable ioctls */
if (dev->board.is_webcam) {
v4l2_disable_ioctl(dev->vdev, VIDIOC_QUERYSTD);
v4l2_disable_ioctl(dev->vdev, VIDIOC_G_STD);
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_STD);
} else {
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM);
}
if (dev->tuner_type == TUNER_ABSENT) {
v4l2_disable_ioctl(dev->vdev, VIDIOC_G_TUNER);
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_TUNER);
v4l2_disable_ioctl(dev->vdev, VIDIOC_G_FREQUENCY);
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_FREQUENCY);
}
if (!dev->audio_mode.has_audio) {
v4l2_disable_ioctl(dev->vdev, VIDIOC_G_AUDIO);
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_AUDIO);
}
/* 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 */
if (em28xx_vbi_supported(dev) == 1) {
dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
"vbi");
dev->vbi_dev->queue = &dev->vb_vbiq;
dev->vbi_dev->queue->lock = &dev->vb_vbi_queue_lock;
/* disable inapplicable ioctls */
v4l2_disable_ioctl(dev->vdev, VIDIOC_S_PARM);
if (dev->tuner_type == TUNER_ABSENT) {
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_TUNER);
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_TUNER);
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_FREQUENCY);
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_FREQUENCY);
}
if (!dev->audio_mode.has_audio) {
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_G_AUDIO);
v4l2_disable_ioctl(dev->vbi_dev, VIDIOC_S_AUDIO);
}
/* 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 %s\n",
video_device_node_name(dev->radio_dev));
}
em28xx_info("V4L2 video device registered as %s\n",
video_device_node_name(dev->vdev));
if (dev->vbi_dev)
em28xx_info("V4L2 VBI device registered as %s\n",
video_device_node_name(dev->vbi_dev));
return 0;
}
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