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android_kernel_xiaomi_sm8350/drivers/media/video/em28xx/em28xx-video.c
Mauro Carvalho Chehab ea8df7e09d V4L/DVB (7542): em28xx: Fix some warnings 
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-04-24 14:08:00 -03:00

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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>
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/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_NAME "em28xx"
#define DRIVER_DESC "Empia em28xx based USB video device driver"
#define EM28XX_VERSION_CODE KERNEL_VERSION(0, 1, 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, __FUNCTION__ , ##arg); } while (0)
#define BUFFER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */
/* Limits minimum and default number of buffers */
#define EM28XX_MIN_BUF 4
#define EM28XX_DEF_BUF 8
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static LIST_HEAD(em28xx_devlist);
static unsigned int card[] = {[0 ... (EM28XX_MAXBOARDS - 1)] = UNSET };
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(card, int, NULL, 0444);
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(card, "card type");
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]");
/* Bitmask marking allocated devices from 0 to EM28XX_MAXBOARDS */
static unsigned long em28xx_devused;
/* 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,
}
};
static struct usb_driver em28xx_usb_driver;
/* ------------------------------------------------------------------
DMA and thread functions
------------------------------------------------------------------*/
/*
* Announces that a buffer were filled and request the next
*/
static void inline buffer_filled (struct em28xx *dev,
struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer *buf)
{
mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
/* Nobody is waiting something to be done, just return */
if (!waitqueue_active(&buf->vb.done)) {
printk(KERN_ERR "em28xx: buffer underrun at %ld\n",
jiffies);
return;
}
/* 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);
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;
if(dev->frame_size != buf->vb.size){
em28xx_errdev("size %i and buf.length %lu are different!\n",
dev->frame_size, buf->vb.size);
return;
}
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 + dev->bytesperline;
linesdone = dma_q->pos / dev->bytesperline;
currlinedone = dma_q->pos % dev->bytesperline;
offset = linesdone * dev->bytesperline * 2 + currlinedone;
startwrite = fieldstart + offset;
lencopy = dev->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));
lencopy = remain = (char*)outp + buf->vb.size - (char*)startwrite;
}
BUG_ON(lencopy <= 0);
memcpy(startwrite, startread, lencopy);
remain -= lencopy;
while (remain > 0) {
startwrite += lencopy + dev->bytesperline;
startread += lencopy;
if (dev->bytesperline > remain)
lencopy = remain;
else
lencopy = dev->bytesperline;
BUG_ON(lencopy <= 0);
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 void inline 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 int inline get_next_buf (struct em28xx_dmaqueue *dma_q,
struct em28xx_buffer **buf)
{
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
if (list_empty(&dma_q->active)) {
em28xx_isocdbg("No active queue to serve\n");
return 0;
}
*buf = list_entry(dma_q->active.next, struct em28xx_buffer, vb.queue);
return 1;
}
/*
* Controls the isoc copy of each urb packet
*/
static inline int em28xx_isoc_copy(struct urb *urb)
{
struct em28xx_buffer *buf;
struct em28xx_dmaqueue *dma_q = urb->context;
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
unsigned char *outp;
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) {
rc=get_next_buf (dma_q, &buf);
if (rc<=0)
return rc;
}
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] == 0x22 && p[1] == 0x5a) {
/* FIXME - are the fields the right way around? */
em28xx_isocdbg("Video frame, length=%i, %s\n", len,
(p[2] & 1)? "top" : "bottom");
em28xx_isocdbg("Current buffer is: outp = 0x%p, len = %i\n", outp, (int)buf->vb.size);
if (p[2] & 1) {
if (buf->receiving) {
buffer_filled (dev, dma_q, buf);
rc=get_next_buf (dma_q, &buf);
if (rc<=0)
return rc;
outp = videobuf_to_vmalloc (&buf->vb);
}
buf->top_field = 1;
} else {
buf->top_field = 0;
}
buf->receiving = 1;
dma_q->pos = 0;
} else if (p[0]==0x33 && p[1]==0x95 && p[2]==0x00) {
em28xx_isocdbg("VBI HEADER!!!\n");
}
em28xx_copy_video(dev, dma_q, buf, p, outp, len);
/* FIXME: Should add vbi copy */
}
return rc;
}
/* ------------------------------------------------------------------
URB control
------------------------------------------------------------------*/
/*
* IRQ callback, called by URB callback
*/
static void em28xx_irq_callback(struct urb *urb)
{
struct em28xx_dmaqueue *dma_q = urb->context;
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
int rc,i;
unsigned long flags;
spin_lock_irqsave(&dev->slock,flags);
/* Copy data from URB */
rc=em28xx_isoc_copy(urb);
/* Reset urb buffers */
for (i = 0; i < urb->number_of_packets; i++) {
urb->iso_frame_desc[i].status = 0;
urb->iso_frame_desc[i].actual_length = 0;
}
urb->status = 0;
if ((urb->status = usb_submit_urb(urb, GFP_ATOMIC))) {
em28xx_err("urb resubmit failed (error=%i)\n",
urb->status);
}
#if 0 /* Bad idea. There are problems that cause a load of valid, but
empty, data packets. Don't reset the timeout unless we've actually
got a frame. I've had xawtv hang in free_buffer due to this! */
if (rc >= 0)
mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
#endif
spin_unlock_irqrestore(&dev->slock,flags);
}
/*
* Stop and Deallocate URBs
*/
static void em28xx_uninit_isoc(struct em28xx *dev)
{
struct urb *urb;
int i;
em28xx_isocdbg("em28xx: called em28xx_uninit_isoc\n");
dev->isoc_ctl.nfields=-1;
dev->isoc_ctl.buf=NULL;
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb=dev->isoc_ctl.urb[i];
if (urb) {
usb_kill_urb(urb);
usb_unlink_urb(urb);
if (dev->isoc_ctl.transfer_buffer[i]) {
usb_buffer_free(dev->udev,
urb->transfer_buffer_length,
dev->isoc_ctl.transfer_buffer[i],
urb->transfer_dma);
}
usb_free_urb(urb);
dev->isoc_ctl.urb[i] = NULL;
}
dev->isoc_ctl.transfer_buffer[i] = NULL;
}
kfree (dev->isoc_ctl.urb);
kfree (dev->isoc_ctl.transfer_buffer);
dev->isoc_ctl.urb=NULL;
dev->isoc_ctl.transfer_buffer=NULL;
dev->isoc_ctl.num_bufs=0;
// em28xx_capture_start(dev, 0); - FIXME - how could I restart it?
}
/*
* Allocate URBs and start IRQ
*/
static int em28xx_prepare_isoc(struct em28xx *dev, int max_packets,
int num_bufs)
{
struct em28xx_dmaqueue *dma_q = &dev->vidq;
int i;
int sb_size, pipe;
struct urb *urb;
int j, k;
em28xx_isocdbg("em28xx: called em28xx_prepare_isoc\n");
/* De-allocates all pending stuff */
em28xx_uninit_isoc(dev);
dev->isoc_ctl.num_bufs = num_bufs;
dev->isoc_ctl.urb = kzalloc(sizeof(void *)*num_bufs, GFP_KERNEL);
if (!dev->isoc_ctl.urb) {
em28xx_errdev("cannot alloc memory for usb buffers\n");
return -ENOMEM;
}
dev->isoc_ctl.transfer_buffer = kzalloc(sizeof(void *)*num_bufs,
GFP_KERNEL);
if (!dev->isoc_ctl.urb) {
em28xx_errdev("cannot allocate memory for usbtransfer\n");
kfree(dev->isoc_ctl.urb);
return -ENOMEM;
}
dev->isoc_ctl.max_pkt_size = dev->max_pkt_size;
sb_size = max_packets * dev->isoc_ctl.max_pkt_size;
/* allocate urbs and transfer buffers */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
urb = usb_alloc_urb(max_packets, GFP_KERNEL);
if (!urb) {
em28xx_err("cannot alloc isoc_ctl.urb %i\n", i);
em28xx_uninit_isoc(dev);
return -ENOMEM;
}
dev->isoc_ctl.urb[i] = urb;
dev->isoc_ctl.transfer_buffer[i] = usb_buffer_alloc(dev->udev,
sb_size, GFP_KERNEL, &urb->transfer_dma);
if (!dev->isoc_ctl.transfer_buffer[i]) {
em28xx_err ("unable to allocate %i bytes for transfer"
" buffer %i%s\n",
sb_size, i,
in_interrupt()?" while in int":"");
em28xx_uninit_isoc(dev);
return -ENOMEM;
}
memset(dev->isoc_ctl.transfer_buffer[i], 0, sb_size);
/* FIXME: this is a hack - should be
'desc.bEndpointAddress & USB_ENDPOINT_NUMBER_MASK'
should also be using 'desc.bInterval'
*/
pipe=usb_rcvisocpipe(dev->udev, 0x82);
usb_fill_int_urb(urb, dev->udev, pipe,
dev->isoc_ctl.transfer_buffer[i], sb_size,
em28xx_irq_callback, dma_q, 1);
urb->number_of_packets = max_packets;
urb->transfer_flags = URB_ISO_ASAP;
k = 0;
for (j = 0; j < max_packets; j++) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length =
dev->isoc_ctl.max_pkt_size;
k += dev->isoc_ctl.max_pkt_size;
}
}
return 0;
}
static int em28xx_start_thread( struct em28xx_dmaqueue *dma_q)
{
struct em28xx *dev = container_of(dma_q, struct em28xx, vidq);
int i,rc = 0;
em28xx_videodbg("Called em28xx_start_thread\n");
init_waitqueue_head(&dma_q->wq);
/* submit urbs and enables IRQ */
for (i = 0; i < dev->isoc_ctl.num_bufs; i++) {
rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_ATOMIC);
if (rc) {
em28xx_err("submit of urb %i failed (error=%i)\n", i,
rc);
em28xx_uninit_isoc(dev);
return rc;
}
}
if (rc<0)
return rc;
return 0;
}
static void em28xx_vid_timeout(unsigned long data)
{
struct em28xx *dev = (struct em28xx*)data;
struct em28xx_dmaqueue *vidq = &dev->vidq;
struct em28xx_buffer *buf;
unsigned long flags;
spin_lock_irqsave(&dev->slock,flags);
while (!list_empty(&vidq->active)) {
buf = list_entry(vidq->active.next, struct em28xx_buffer,
vb.queue);
list_del(&buf->vb.queue);
buf->vb.state = VIDEOBUF_ERROR;
wake_up(&buf->vb.done);
em28xx_videodbg("em28xx/0: [%p/%d] timeout\n",
buf, buf->vb.i);
}
/* restart_video_queue(vidq); */
spin_unlock_irqrestore(&dev->slock,flags);
}
/* ------------------------------------------------------------------
Videobuf operations
------------------------------------------------------------------*/
static int
buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
{
struct em28xx_fh *fh = vq->priv_data;
*size = 16 * fh->dev->width * fh->dev->height >> 3;
if (0 == *count)
*count = EM28XX_DEF_BUF;
if (*count < EM28XX_MIN_BUF) {
*count=EM28XX_MIN_BUF;
}
return 0;
}
static void free_buffer(struct videobuf_queue *vq, struct em28xx_buffer *buf)
{
if (in_interrupt())
BUG();
videobuf_waiton(&buf->vb, 0, 0);
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;
struct em28xx_dmaqueue *vidq = &dev->vidq;
int rc = 0, urb_init = 0;
/* BUG_ON(NULL == fh->fmt); */
/* FIXME: It assumes depth = 16 */
/* The only currently supported format is 16 bits/pixel */
buf->vb.size = 16 * dev->width * dev->height >> 3;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
if (buf->fmt != fh->fmt ||
buf->vb.width != dev->width ||
buf->vb.height != dev->height ||
buf->vb.field != field) {
buf->fmt = fh->fmt;
buf->vb.width = dev->width;
buf->vb.height = dev->height;
buf->vb.field = field;
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
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_prepare_isoc(dev, EM28XX_NUM_PACKETS, EM28XX_NUM_BUFS);
if (rc<0)
goto fail;
/* FIXME - should probably be done in response to STREAMON */
rc = em28xx_start_thread(vidq);
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 ******************************************/
/*
* em28xx_config()
* inits registers with sane defaults
*/
static int em28xx_config(struct em28xx *dev)
{
/* Sets I2C speed to 100 KHz */
if (!dev->is_em2800)
em28xx_write_regs_req(dev, 0x00, 0x06, "\x40", 1);
/* enable vbi capturing */
/* em28xx_write_regs_req(dev,0x00,0x0e,"\xC0",1); audio register */
/* em28xx_write_regs_req(dev,0x00,0x0f,"\x80",1); clk register */
em28xx_write_regs_req(dev,0x00,0x11,"\x51",1);
dev->mute = 1; /* maybe not the right place... */
dev->volume = 0x1f;
em28xx_outfmt_set_yuv422(dev);
em28xx_colorlevels_set_default(dev);
em28xx_compression_disable(dev);
return 0;
}
/*
* em28xx_config_i2c()
* configure i2c attached devices
*/
static void em28xx_config_i2c(struct em28xx *dev)
{
struct v4l2_routing route;
route.input = INPUT(dev->ctl_input)->vmux;
route.output = 0;
em28xx_i2c_call_clients(dev, VIDIOC_INT_RESET, NULL);
em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
em28xx_i2c_call_clients(dev, VIDIOC_STREAMON, NULL);
}
static void video_mux(struct em28xx *dev, int index)
{
struct v4l2_routing route;
route.input = INPUT(index)->vmux;
route.output = 0;
dev->ctl_input = index;
dev->ctl_ainput = INPUT(index)->amux;
em28xx_i2c_call_clients(dev, VIDIOC_INT_S_VIDEO_ROUTING, &route);
if (dev->has_msp34xx) {
if (dev->i2s_speed)
em28xx_i2c_call_clients(dev, VIDIOC_INT_I2S_CLOCK_FREQ, &dev->i2s_speed);
route.input = dev->ctl_ainput;
route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
/* Note: this is msp3400 specific */
em28xx_i2c_call_clients(dev, VIDIOC_INT_S_AUDIO_ROUTING, &route);
}
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;
mutex_lock(&dev->lock);
if (dev->stream_on)
rc = -EINVAL;
else {
dev->stream_on = 1;
fh->stream_on = 1;
}
mutex_unlock(&dev->lock);
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;
mutex_lock(&dev->lock);
fh->stream_on = 0;
dev->stream_on = 0;
mutex_unlock(&dev->lock);
}
/*
* 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_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 = V4L2_PIX_FMT_YUYV;
f->fmt.pix.bytesperline = dev->bytesperline;
f->fmt.pix.sizeimage = dev->frame_size;
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 int vidioc_try_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int width = f->fmt.pix.width;
int height = f->fmt.pix.height;
unsigned int maxw = norm_maxw(dev);
unsigned int maxh = norm_maxh(dev);
unsigned int hscale, vscale;
/* width must even because of the YUYV format
height must be even because of interlacing */
height &= 0xfffe;
width &= 0xfffe;
if (height < 32)
height = 32;
if (height > maxh)
height = maxh;
if (width < 48)
width = 48;
if (width > maxw)
width = maxw;
mutex_lock(&dev->lock);
if (dev->is_em2800) {
/* the em2800 can only scale down to 50% */
if (height % (maxh / 2))
height = maxh;
if (width % (maxw / 2))
width = maxw;
/* according to empiatech support */
/* the MaxPacketSize is to 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;
}
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 = V4L2_PIX_FMT_YUYV;
f->fmt.pix.bytesperline = width * 2;
f->fmt.pix.sizeimage = width * 2 * height;
f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
f->fmt.pix.field = V4L2_FIELD_INTERLACED;
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_s_fmt_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;
vidioc_try_fmt_cap(file, priv, f);
mutex_lock(&dev->lock);
/* set new image size */
dev->width = f->fmt.pix.width;
dev->height = f->fmt.pix.height;
dev->frame_size = dev->width * dev->height * 2;
dev->field_size = dev->frame_size >> 1;
dev->bytesperline = dev->width * 2;
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_set_alternate(dev);
em28xx_capture_start(dev, 1); /* ??? */
em28xx_resolution_set(dev);
mutex_unlock(&dev->lock);
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;
int rc;
rc = check_dev(dev);
if (rc < 0)
return rc;
mutex_lock(&dev->lock);
dev->norm = *norm;
mutex_unlock(&dev->lock);
/* Adjusts width/height, if needed */
f.fmt.pix.width = dev->width;
f.fmt.pix.height = dev->height;
vidioc_try_fmt_cap(file, priv, &f);
mutex_lock(&dev->lock);
/* set new image size */
dev->width = f.fmt.pix.width;
dev->height = f.fmt.pix.height;
dev->frame_size = dev->width * dev->height * 2;
dev->field_size = dev->frame_size >> 1;
dev->bytesperline = dev->width * 2;
get_scale(dev, dev->width, dev->height, &dev->hscale, &dev->vscale);
em28xx_resolution_set(dev);
em28xx_i2c_call_clients(dev, VIDIOC_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;
mutex_lock(&dev->lock);
video_mux(dev, i);
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;
unsigned int index = a->index;
if (a->index > 1)
return -EINVAL;
index = dev->ctl_ainput;
if (index == 0) {
strcpy(a->name, "Television");
} else {
strcpy(a->name, "Line In");
}
a->capability = V4L2_AUDCAP_STEREO;
a->index = index;
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 != dev->ctl_ainput)
return -EINVAL;
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->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);
em28xx_i2c_call_clients(dev, VIDIOC_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;
mutex_lock(&dev->lock);
if (!dev->has_msp34xx)
rc = em28xx_get_ctrl(dev, ctrl);
else
rc = -EINVAL;
if (rc == -EINVAL) {
em28xx_i2c_call_clients(dev, VIDIOC_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->has_msp34xx)
em28xx_i2c_call_clients(dev, VIDIOC_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) {
em28xx_i2c_call_clients(dev, VIDIOC_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);
em28xx_i2c_call_clients(dev, VIDIOC_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);
em28xx_i2c_call_clients(dev, VIDIOC_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;
f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
f->frequency = dev->ctl_freq;
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;
em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, f);
mutex_unlock(&dev->lock);
return 0;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
static int em28xx_reg_len(int reg)
{
switch (reg) {
case AC97LSB_REG:
case HSCALELOW_REG:
case VSCALELOW_REG:
return 2;
default:
return 1;
}
}
static int vidioc_g_register(struct file *file, void *priv,
struct v4l2_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
int ret;
if (!v4l2_chip_match_host(reg->match_type, reg->match_chip))
return -EINVAL;
if (em28xx_reg_len(reg->reg) == 1) {
ret = em28xx_read_reg(dev, reg->reg);
if (ret < 0)
return ret;
reg->val = ret;
} else {
u64 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 = cpu_to_le64((__u64)val);
}
return 0;
}
static int vidioc_s_register(struct file *file, void *priv,
struct v4l2_register *reg)
{
struct em28xx_fh *fh = priv;
struct em28xx *dev = fh->dev;
u64 buf;
buf = le64_to_cpu((__u64)reg->val);
return em28xx_write_regs(dev, reg->reg, (char *)&buf,
em28xx_reg_len(reg->reg));
}
#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;
if (unlikely(res_get(fh) < 0))
return -EBUSY;
/* We can't do this from buffer_queue or anything called from
there, since it's called with IRQs disabled and the spinlock held,
and this uses USB functions that may sleep
FIXME FIXME FIXME - putting this here means it may not always
be called when it needs to be */
em28xx_capture_start(dev, 1);
return (videobuf_streamon(&fh->vb_vidq));
}
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;
videobuf_streamoff(&fh->vb_vidq);
res_free(fh);
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));
strlcpy(cap->bus_info, dev->udev->dev.bus_id, 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_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *fmtd)
{
if (fmtd->index != 0)
return -EINVAL;
fmtd->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
strcpy(fmtd->description, "Packed YUY2");
fmtd->pixelformat = V4L2_PIX_FMT_YUYV;
memset(fmtd->reserved, 0, sizeof(fmtd->reserved));
return 0;
}
/* Sliced VBI ioctls */
static int vidioc_g_fmt_vbi_capture(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;
em28xx_i2c_call_clients(dev, VIDIOC_G_FMT, f);
if (f->fmt.sliced.service_set == 0)
rc = -EINVAL;
mutex_unlock(&dev->lock);
return rc;
}
static int vidioc_try_set_vbi_capture(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);
em28xx_i2c_call_clients(dev, VIDIOC_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));
strlcpy(cap->bus_info, dev->udev->dev.bus_id, 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;
em28xx_i2c_call_clients(dev, VIDIOC_G_TUNER, t);
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;
em28xx_i2c_call_clients(dev, VIDIOC_S_TUNER, t);
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 inode *inode, struct file *filp)
{
int minor = iminor(inode);
int errCode = 0, radio = 0;
struct em28xx *h,*dev = NULL;
struct em28xx_fh *fh;
enum v4l2_buf_type fh_type = 0;
list_for_each_entry(h, &em28xx_devlist, devlist) {
if (h->vdev->minor == minor) {
dev = h;
fh_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
}
if (h->vbi_dev->minor == minor) {
dev = h;
fh_type = V4L2_BUF_TYPE_VBI_CAPTURE;
}
if (h->radio_dev &&
h->radio_dev->minor == minor) {
radio = 1;
dev = h;
}
}
if (NULL == dev)
return -ENODEV;
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");
return -ENOMEM;
}
mutex_lock(&dev->lock);
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) {
dev->width = norm_maxw(dev);
dev->height = norm_maxh(dev);
dev->frame_size = dev->width * dev->height * 2;
dev->field_size = dev->frame_size >> 1; /*both_fileds ? dev->frame_size>>1 : dev->frame_size; */
dev->bytesperline = dev->width * 2;
dev->hscale = 0;
dev->vscale = 0;
em28xx_set_alternate(dev);
em28xx_resolution_set(dev);
}
if (fh->radio) {
em28xx_videodbg("video_open: setting radio device\n");
em28xx_i2c_call_clients(dev, AUDC_SET_RADIO, NULL);
}
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
*/
static void em28xx_release_resources(struct em28xx *dev)
{
/*FIXME: I2C IR should be disconnected */
em28xx_info("V4L2 devices /dev/video%d and /dev/vbi%d deregistered\n",
dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
list_del(&dev->devlist);
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) {
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) {
if (-1 != dev->vdev->minor)
video_unregister_device(dev->vdev);
else
video_device_release(dev->vdev);
dev->vdev = NULL;
}
em28xx_i2c_unregister(dev);
usb_put_dev(dev->udev);
/* Mark device as unused */
em28xx_devused&=~(1<<dev->devno);
}
/*
* em28xx_v4l2_close()
* stops streaming and deallocates all resources allocated by the v4l2 calls and ioctls
*/
static int em28xx_v4l2_close(struct inode *inode, struct file *filp)
{
struct em28xx_fh *fh = filp->private_data;
struct em28xx *dev = fh->dev;
int errCode;
em28xx_videodbg("users=%d\n", dev->users);
if (res_check(fh))
res_free(fh);
mutex_lock(&dev->lock);
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;
}
/* do this before setting alternate! */
em28xx_uninit_isoc(dev);
/* 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) {
if (unlikely(res_get(fh)))
return -EBUSY;
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;
if (unlikely(res_get(fh) < 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;
if (unlikely(res_get(fh) < 0))
return -EBUSY;
rc = check_dev(dev);
if (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 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,
.llseek = no_llseek,
.compat_ioctl = v4l_compat_ioctl32,
};
static const struct file_operations radio_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.ioctl = video_ioctl2,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static const struct video_device em28xx_video_template = {
.fops = &em28xx_v4l_fops,
.release = video_device_release,
.minor = -1,
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_cap = vidioc_enum_fmt_cap,
.vidioc_g_fmt_cap = vidioc_g_fmt_cap,
.vidioc_try_fmt_cap = vidioc_try_fmt_cap,
.vidioc_s_fmt_cap = vidioc_s_fmt_cap,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_cropcap = vidioc_cropcap,
.vidioc_g_fmt_vbi_capture = vidioc_g_fmt_vbi_capture,
.vidioc_try_fmt_vbi_capture = vidioc_try_set_vbi_capture,
.vidioc_s_fmt_vbi_capture = vidioc_try_set_vbi_capture,
.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,
#endif
#ifdef CONFIG_VIDEO_V4L1_COMPAT
.vidiocgmbuf = vidiocgmbuf,
#endif
.tvnorms = V4L2_STD_ALL,
.current_norm = V4L2_STD_PAL,
};
static struct video_device em28xx_radio_template = {
.name = "em28xx-radio",
.type = VID_TYPE_TUNER,
.fops = &radio_fops,
.minor = -1,
.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
};
/******************************** usb interface *****************************************/
static LIST_HEAD(em28xx_extension_devlist);
static DEFINE_MUTEX(em28xx_extension_devlist_lock);
int em28xx_register_extension(struct em28xx_ops *ops)
{
struct em28xx *h, *dev = NULL;
list_for_each_entry(h, &em28xx_devlist, devlist)
dev = h;
mutex_lock(&em28xx_extension_devlist_lock);
list_add_tail(&ops->next, &em28xx_extension_devlist);
if (dev)
ops->init(dev);
printk(KERN_INFO "Em28xx: Initialized (%s) extension\n", ops->name);
mutex_unlock(&em28xx_extension_devlist_lock);
return 0;
}
EXPORT_SYMBOL(em28xx_register_extension);
void em28xx_unregister_extension(struct em28xx_ops *ops)
{
struct em28xx *h, *dev = NULL;
list_for_each_entry(h, &em28xx_devlist, devlist)
dev = h;
if (dev)
ops->fini(dev);
mutex_lock(&em28xx_extension_devlist_lock);
printk(KERN_INFO "Em28xx: Removed (%s) extension\n", ops->name);
list_del(&ops->next);
mutex_unlock(&em28xx_extension_devlist_lock);
}
EXPORT_SYMBOL(em28xx_unregister_extension);
static struct video_device *em28xx_vdev_init(struct em28xx *dev,
const struct video_device *template,
const int type,
const char *type_name)
{
struct video_device *vfd;
vfd = video_device_alloc();
if (NULL == vfd)
return NULL;
*vfd = *template;
vfd->minor = -1;
vfd->dev = &dev->udev->dev;
vfd->release = video_device_release;
vfd->type = type;
snprintf(vfd->name, sizeof(vfd->name), "%s %s",
dev->name, type_name);
return vfd;
}
/*
* em28xx_init_dev()
* allocates and inits the device structs, registers i2c bus and v4l device
*/
static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
int minor)
{
struct em28xx_ops *ops = NULL;
struct em28xx *dev = *devhandle;
int retval = -ENOMEM;
int errCode;
unsigned int maxh, maxw;
dev->udev = udev;
mutex_init(&dev->lock);
spin_lock_init(&dev->slock);
init_waitqueue_head(&dev->open);
init_waitqueue_head(&dev->wait_frame);
init_waitqueue_head(&dev->wait_stream);
dev->em28xx_write_regs = em28xx_write_regs;
dev->em28xx_read_reg = em28xx_read_reg;
dev->em28xx_read_reg_req_len = em28xx_read_reg_req_len;
dev->em28xx_write_regs_req = em28xx_write_regs_req;
dev->em28xx_read_reg_req = em28xx_read_reg_req;
dev->is_em2800 = em28xx_boards[dev->model].is_em2800;
errCode = em28xx_read_reg(dev, CHIPID_REG);
if (errCode >= 0)
em28xx_info("em28xx chip ID = %d\n", errCode);
em28xx_pre_card_setup(dev);
errCode = em28xx_config(dev);
if (errCode) {
em28xx_errdev("error configuring device\n");
em28xx_devused &= ~(1<<dev->devno);
kfree(dev);
return -ENOMEM;
}
/* register i2c bus */
em28xx_i2c_register(dev);
/* Do board specific init and eeprom reading */
em28xx_card_setup(dev);
/* Configure audio */
em28xx_audio_analog_set(dev);
/* configure the device */
em28xx_config_i2c(dev);
/* set default norm */
dev->norm = em28xx_video_template.current_norm;
maxw = norm_maxw(dev);
maxh = norm_maxh(dev);
/* set default image size */
dev->width = maxw;
dev->height = maxh;
dev->interlaced = EM28XX_INTERLACED_DEFAULT;
dev->field_size = dev->width * dev->height;
dev->frame_size =
dev->interlaced ? dev->field_size << 1 : dev->field_size;
dev->bytesperline = dev->width * 2;
dev->hscale = 0;
dev->vscale = 0;
dev->ctl_input = 2;
errCode = em28xx_config(dev);
list_add_tail(&dev->devlist, &em28xx_devlist);
/* allocate and fill video video_device struct */
dev->vdev = em28xx_vdev_init(dev, &em28xx_video_template,
VID_TYPE_CAPTURE, "video");
if (NULL == dev->vdev) {
em28xx_errdev("cannot allocate video_device.\n");
goto fail_unreg;
}
if (dev->tuner_type != TUNER_ABSENT)
dev->vdev->type |= VID_TYPE_TUNER;
/* register v4l2 video video_device */
retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
video_nr[dev->devno]);
if (retval) {
em28xx_errdev("unable to register video device (error=%i).\n",
retval);
goto fail_unreg;
}
/* Allocate and fill vbi video_device struct */
dev->vbi_dev = em28xx_vdev_init(dev, &em28xx_video_template,
VFL_TYPE_VBI, "vbi");
/* register v4l2 vbi video_device */
if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
vbi_nr[dev->devno]) < 0) {
em28xx_errdev("unable to register vbi device\n");
retval = -ENODEV;
goto fail_unreg;
}
if (em28xx_boards[dev->model].radio.type == EM28XX_RADIO) {
dev->radio_dev = em28xx_vdev_init(dev, &em28xx_radio_template,
VFL_TYPE_RADIO, "radio");
if (NULL == dev->radio_dev) {
em28xx_errdev("cannot allocate video_device.\n");
goto fail_unreg;
}
retval = video_register_device(dev->radio_dev, VFL_TYPE_RADIO,
radio_nr[dev->devno]);
if (retval < 0) {
em28xx_errdev("can't register radio device\n");
goto fail_unreg;
}
em28xx_info("Registered radio device as /dev/radio%d\n",
dev->radio_dev->minor & 0x1f);
}
/* init video dma queues */
INIT_LIST_HEAD(&dev->vidq.active);
INIT_LIST_HEAD(&dev->vidq.queued);
dev->vidq.timeout.function = em28xx_vid_timeout;
dev->vidq.timeout.data = (unsigned long)dev;
init_timer(&dev->vidq.timeout);
if (dev->has_msp34xx) {
/* Send a reset to other chips via gpio */
em28xx_write_regs_req(dev, 0x00, 0x08, "\xf7", 1);
msleep(3);
em28xx_write_regs_req(dev, 0x00, 0x08, "\xff", 1);
msleep(3);
}
video_mux(dev, 0);
em28xx_info("V4L2 device registered as /dev/video%d and /dev/vbi%d\n",
dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN,
dev->vbi_dev->minor-MINOR_VFL_TYPE_VBI_MIN);
mutex_lock(&em28xx_extension_devlist_lock);
if (!list_empty(&em28xx_extension_devlist)) {
list_for_each_entry(ops, &em28xx_extension_devlist, next) {
if (ops->id)
ops->init(dev);
}
}
mutex_unlock(&em28xx_extension_devlist_lock);
return 0;
fail_unreg:
em28xx_release_resources(dev);
mutex_unlock(&dev->lock);
kfree(dev);
return retval;
}
#if defined(CONFIG_MODULES) && defined(MODULE)
static void request_module_async(struct work_struct *work)
{
struct em28xx *dev = container_of(work,
struct em28xx, request_module_wk);
if (dev->has_audio_class)
request_module("snd-usb-audio");
else
request_module("em28xx-alsa");
}
static void request_modules(struct em28xx *dev)
{
INIT_WORK(&dev->request_module_wk, request_module_async);
schedule_work(&dev->request_module_wk);
}
#else
#define request_modules(dev)
#endif /* CONFIG_MODULES */
/*
* em28xx_usb_probe()
* checks for supported devices
*/
static int em28xx_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
const struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev;
struct usb_interface *uif;
struct em28xx *dev = NULL;
int retval = -ENODEV;
int i, nr, ifnum;
udev = usb_get_dev(interface_to_usbdev(interface));
ifnum = interface->altsetting[0].desc.bInterfaceNumber;
/* Check to see next free device and mark as used */
nr=find_first_zero_bit(&em28xx_devused,EM28XX_MAXBOARDS);
em28xx_devused|=1<<nr;
/* Don't register audio interfaces */
if (interface->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
em28xx_err(DRIVER_NAME " audio device (%04x:%04x): interface %i, class %i\n",
udev->descriptor.idVendor,udev->descriptor.idProduct,
ifnum,
interface->altsetting[0].desc.bInterfaceClass);
em28xx_devused&=~(1<<nr);
return -ENODEV;
}
em28xx_err(DRIVER_NAME " new video device (%04x:%04x): interface %i, class %i\n",
udev->descriptor.idVendor,udev->descriptor.idProduct,
ifnum,
interface->altsetting[0].desc.bInterfaceClass);
endpoint = &interface->cur_altsetting->endpoint[1].desc;
/* check if the device has the iso in endpoint at the correct place */
if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
USB_ENDPOINT_XFER_ISOC) {
em28xx_err(DRIVER_NAME " probing error: endpoint is non-ISO endpoint!\n");
em28xx_devused&=~(1<<nr);
return -ENODEV;
}
if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) {
em28xx_err(DRIVER_NAME " probing error: endpoint is ISO OUT endpoint!\n");
em28xx_devused&=~(1<<nr);
return -ENODEV;
}
if (nr >= EM28XX_MAXBOARDS) {
printk (DRIVER_NAME ": Supports only %i em28xx boards.\n",EM28XX_MAXBOARDS);
em28xx_devused&=~(1<<nr);
return -ENOMEM;
}
/* allocate memory for our device state and initialize it */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
em28xx_err(DRIVER_NAME ": out of memory!\n");
em28xx_devused&=~(1<<nr);
return -ENOMEM;
}
snprintf(dev->name, 29, "em28xx #%d", nr);
dev->devno = nr;
dev->model = id->driver_info;
dev->alt = -1;
/* Checks if audio is provided by some interface */
for (i = 0; i < udev->config->desc.bNumInterfaces; i++) {
uif = udev->config->interface[i];
if (uif->altsetting[0].desc.bInterfaceClass == USB_CLASS_AUDIO) {
dev->has_audio_class = 1;
break;
}
}
printk(KERN_INFO DRIVER_NAME " %s usb audio class\n",
dev->has_audio_class ? "Has" : "Doesn't have");
/* compute alternate max packet sizes */
uif = udev->actconfig->interface[0];
dev->num_alt=uif->num_altsetting;
em28xx_info("Alternate settings: %i\n",dev->num_alt);
// dev->alt_max_pkt_size = kmalloc(sizeof(*dev->alt_max_pkt_size)*
dev->alt_max_pkt_size = kmalloc(32*
dev->num_alt,GFP_KERNEL);
if (dev->alt_max_pkt_size == NULL) {
em28xx_errdev("out of memory!\n");
em28xx_devused&=~(1<<nr);
kfree(dev);
return -ENOMEM;
}
for (i = 0; i < dev->num_alt ; i++) {
u16 tmp = le16_to_cpu(uif->altsetting[i].endpoint[1].desc.
wMaxPacketSize);
dev->alt_max_pkt_size[i] =
(tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
em28xx_info("Alternate setting %i, max size= %i\n",i,
dev->alt_max_pkt_size[i]);
}
if ((card[nr]>=0)&&(card[nr]<em28xx_bcount))
dev->model = card[nr];
/* allocate device struct */
retval = em28xx_init_dev(&dev, udev, nr);
if (retval)
return retval;
em28xx_info("Found %s\n", em28xx_boards[dev->model].name);
/* save our data pointer in this interface device */
usb_set_intfdata(interface, dev);
request_modules(dev);
return 0;
}
/*
* em28xx_usb_disconnect()
* called when the device gets diconencted
* video device will be unregistered on v4l2_close in case it is still open
*/
static void em28xx_usb_disconnect(struct usb_interface *interface)
{
struct em28xx *dev;
struct em28xx_ops *ops = NULL;
dev = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
if (!dev)
return;
em28xx_info("disconnecting %s\n", dev->vdev->name);
/* wait until all current v4l2 io is finished then deallocate resources */
mutex_lock(&dev->lock);
wake_up_interruptible_all(&dev->open);
if (dev->users) {
em28xx_warn
("device /dev/video%d is open! Deregistration and memory "
"deallocation are deferred on close.\n",
dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
dev->state |= DEV_MISCONFIGURED;
em28xx_uninit_isoc(dev);
dev->state |= DEV_DISCONNECTED;
wake_up_interruptible(&dev->wait_frame);
wake_up_interruptible(&dev->wait_stream);
} else {
dev->state |= DEV_DISCONNECTED;
em28xx_release_resources(dev);
}
mutex_unlock(&dev->lock);
mutex_lock(&em28xx_extension_devlist_lock);
if (!list_empty(&em28xx_extension_devlist)) {
list_for_each_entry(ops, &em28xx_extension_devlist, next) {
ops->fini(dev);
}
}
mutex_unlock(&em28xx_extension_devlist_lock);
if (!dev->users) {
kfree(dev->alt_max_pkt_size);
kfree(dev);
}
}
static struct usb_driver em28xx_usb_driver = {
.name = "em28xx",
.probe = em28xx_usb_probe,
.disconnect = em28xx_usb_disconnect,
.id_table = em28xx_id_table,
};
static int __init em28xx_module_init(void)
{
int result;
printk(KERN_INFO DRIVER_NAME " v4l2 driver version %d.%d.%d loaded\n",
(EM28XX_VERSION_CODE >> 16) & 0xff,
(EM28XX_VERSION_CODE >> 8) & 0xff, EM28XX_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
printk(KERN_INFO DRIVER_NAME " snapshot date %04d-%02d-%02d\n",
SNAPSHOT / 10000, (SNAPSHOT / 100) % 100, SNAPSHOT % 100);
#endif
/* register this driver with the USB subsystem */
result = usb_register(&em28xx_usb_driver);
if (result)
em28xx_err(DRIVER_NAME
" usb_register failed. Error number %d.\n", result);
return result;
}
static void __exit em28xx_module_exit(void)
{
/* deregister this driver with the USB subsystem */
usb_deregister(&em28xx_usb_driver);
}
module_init(em28xx_module_init);
module_exit(em28xx_module_exit);
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