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OpenCloudOS-Kernel/drivers/media/video/em28xx/em28xx-video.c

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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/video_decoder.h>
#include <linux/mutex.h>
#include "em28xx.h"
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include <media/msp3400.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, 0, 1)
#define em28xx_videodbg(fmt, arg...) do {\
if (video_debug) \
printk(KERN_INFO "%s %s :"fmt, \
dev->name, __FUNCTION__ , ##arg); } while (0)
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 };
module_param_array(card, int, NULL, 0444);
module_param_array(video_nr, int, NULL, 0444);
module_param_array(vbi_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");
static int tuner = -1;
module_param(tuner, int, 0444);
MODULE_PARM_DESC(tuner, "tuner type");
static unsigned int video_debug = 0;
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 tv norms */
static struct em28xx_tvnorm tvnorms[] = {
{
.name = "PAL",
.id = V4L2_STD_PAL,
.mode = VIDEO_MODE_PAL,
}, {
.name = "NTSC",
.id = V4L2_STD_NTSC,
.mode = VIDEO_MODE_NTSC,
}, {
.name = "SECAM",
.id = V4L2_STD_SECAM,
.mode = VIDEO_MODE_SECAM,
}, {
.name = "PAL-M",
.id = V4L2_STD_PAL_M,
.mode = VIDEO_MODE_PAL,
}
};
#define TVNORMS ARRAY_SIZE(tvnorms)
/* 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;
static DEFINE_MUTEX(em28xx_sysfs_lock);
static DECLARE_RWSEM(em28xx_disconnect);
/********************* v4l2 interface ******************************************/
/*
* em28xx_config()
* inits registers with sane defaults
*/
static int em28xx_config(struct em28xx *dev)
{
/* Sets I2C speed to 100 KHz */
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);
em28xx_audio_usb_mute(dev, 1);
dev->mute = 1; /* maybe not the right place... */
dev->volume = 0x1f;
em28xx_audio_analog_set(dev);
em28xx_audio_analog_setup(dev);
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_frequency f;
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);
/* configure tuner */
f.tuner = 0;
f.type = V4L2_TUNER_ANALOG_TV;
f.frequency = 9076; /* FIXME:remove magic number */
dev->ctl_freq = f.frequency;
em28xx_i2c_call_clients(dev, VIDIOC_S_FREQUENCY, &f);
/* configure tda9887 */
/* em28xx_i2c_call_clients(dev,VIDIOC_S_STD,&dev->tvnorm->id); */
}
/*
* em28xx_empty_framequeues()
* prepare queues for incoming and outgoing frames
*/
static void em28xx_empty_framequeues(struct em28xx *dev)
{
u32 i;
INIT_LIST_HEAD(&dev->inqueue);
INIT_LIST_HEAD(&dev->outqueue);
for (i = 0; i < EM28XX_NUM_FRAMES; i++) {
dev->frame[i].state = F_UNUSED;
dev->frame[i].buf.bytesused = 0;
}
}
static void video_mux(struct em28xx *dev, int index)
{
int ainput;
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);
em28xx_videodbg("Setting input index=%d, vmux=%d, amux=%d\n",index,route.input,dev->ctl_ainput);
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);
ainput = EM28XX_AUDIO_SRC_TUNER;
em28xx_audio_source(dev, ainput);
} else {
switch (dev->ctl_ainput) {
case 0:
ainput = EM28XX_AUDIO_SRC_TUNER;
break;
default:
ainput = EM28XX_AUDIO_SRC_LINE;
}
em28xx_audio_source(dev, ainput);
}
}
/*
* 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;
struct em28xx *h,*dev = NULL;
struct list_head *list;
list_for_each(list,&em28xx_devlist) {
h = list_entry(list, struct em28xx, devlist);
if (h->vdev->minor == minor) {
dev = h;
dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
}
if (h->vbi_dev->minor == minor) {
dev = h;
dev->type = V4L2_BUF_TYPE_VBI_CAPTURE;
}
}
if (NULL == dev)
return -ENODEV;
em28xx_videodbg("open minor=%d type=%s users=%d\n",
minor,v4l2_type_names[dev->type],dev->users);
if (!down_read_trylock(&em28xx_disconnect))
return -ERESTARTSYS;
if (dev->users) {
em28xx_warn("this driver can be opened only once\n");
up_read(&em28xx_disconnect);
return -EBUSY;
}
mutex_init(&dev->fileop_lock); /* to 1 == available */
spin_lock_init(&dev->queue_lock);
init_waitqueue_head(&dev->wait_frame);
init_waitqueue_head(&dev->wait_stream);
mutex_lock(&dev->lock);
if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
em28xx_set_alternate(dev);
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_capture_start(dev, 1);
em28xx_resolution_set(dev);
/* device needs to be initialized before isoc transfer */
video_mux(dev, 0);
/* start the transfer */
errCode = em28xx_init_isoc(dev);
if (errCode)
goto err;
}
dev->users++;
filp->private_data = dev;
dev->io = IO_NONE;
dev->stream = STREAM_OFF;
dev->num_frames = 0;
/* prepare queues */
em28xx_empty_framequeues(dev);
dev->state |= DEV_INITIALIZED;
err:
mutex_unlock(&dev->lock);
up_read(&em28xx_disconnect);
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)
{
mutex_lock(&em28xx_sysfs_lock);
/*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);
video_unregister_device(dev->vdev);
video_unregister_device(dev->vbi_dev);
em28xx_i2c_unregister(dev);
usb_put_dev(dev->udev);
mutex_unlock(&em28xx_sysfs_lock);
/* 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)
{
int errCode;
struct em28xx *dev=filp->private_data;
em28xx_videodbg("users=%d\n", dev->users);
mutex_lock(&dev->lock);
em28xx_uninit_isoc(dev);
em28xx_release_buffers(dev);
/* 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;
}
/* 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--;
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 * f_pos)
{
struct em28xx_frame_t *f, *i;
unsigned long lock_flags;
int ret = 0;
struct em28xx *dev = filp->private_data;
if (dev->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
em28xx_videodbg("V4l2_Buf_type_videocapture is set\n");
}
if (dev->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
em28xx_videodbg("V4L2_BUF_TYPE_VBI_CAPTURE is set\n");
em28xx_videodbg("not supported yet! ...\n");
if (copy_to_user(buf, "", 1)) {
mutex_unlock(&dev->fileop_lock);
return -EFAULT;
}
return (1);
}
if (dev->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
em28xx_videodbg("V4L2_BUF_TYPE_SLICED_VBI_CAPTURE is set\n");
em28xx_videodbg("not supported yet! ...\n");
if (copy_to_user(buf, "", 1)) {
mutex_unlock(&dev->fileop_lock);
return -EFAULT;
}
return (1);
}
if (mutex_lock_interruptible(&dev->fileop_lock))
return -ERESTARTSYS;
if (dev->state & DEV_DISCONNECTED) {
em28xx_videodbg("device not present\n");
mutex_unlock(&dev->fileop_lock);
return -ENODEV;
}
if (dev->state & DEV_MISCONFIGURED) {
em28xx_videodbg("device misconfigured; close and open it again\n");
mutex_unlock(&dev->fileop_lock);
return -EIO;
}
if (dev->io == IO_MMAP) {
em28xx_videodbg ("IO method is set to mmap; close and open"
" the device again to choose the read method\n");
mutex_unlock(&dev->fileop_lock);
return -EINVAL;
}
if (dev->io == IO_NONE) {
if (!em28xx_request_buffers(dev, EM28XX_NUM_READ_FRAMES)) {
em28xx_errdev("read failed, not enough memory\n");
mutex_unlock(&dev->fileop_lock);
return -ENOMEM;
}
dev->io = IO_READ;
dev->stream = STREAM_ON;
em28xx_queue_unusedframes(dev);
}
if (!count) {
mutex_unlock(&dev->fileop_lock);
return 0;
}
if (list_empty(&dev->outqueue)) {
if (filp->f_flags & O_NONBLOCK) {
mutex_unlock(&dev->fileop_lock);
return -EAGAIN;
}
ret = wait_event_interruptible
(dev->wait_frame,
(!list_empty(&dev->outqueue)) ||
(dev->state & DEV_DISCONNECTED));
if (ret) {
mutex_unlock(&dev->fileop_lock);
return ret;
}
if (dev->state & DEV_DISCONNECTED) {
mutex_unlock(&dev->fileop_lock);
return -ENODEV;
}
}
f = list_entry(dev->outqueue.prev, struct em28xx_frame_t, frame);
spin_lock_irqsave(&dev->queue_lock, lock_flags);
list_for_each_entry(i, &dev->outqueue, frame)
i->state = F_UNUSED;
INIT_LIST_HEAD(&dev->outqueue);
spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
em28xx_queue_unusedframes(dev);
if (count > f->buf.length)
count = f->buf.length;
if (copy_to_user(buf, f->bufmem, count)) {
mutex_unlock(&dev->fileop_lock);
return -EFAULT;
}
*f_pos += count;
mutex_unlock(&dev->fileop_lock);
return count;
}
/*
* em28xx_v4l2_poll()
* will allocate buffers when called for the first time
*/
static unsigned int em28xx_v4l2_poll(struct file *filp, poll_table * wait)
{
unsigned int mask = 0;
struct em28xx *dev = filp->private_data;
if (mutex_lock_interruptible(&dev->fileop_lock))
return POLLERR;
if (dev->state & DEV_DISCONNECTED) {
em28xx_videodbg("device not present\n");
} else if (dev->state & DEV_MISCONFIGURED) {
em28xx_videodbg("device is misconfigured; close and open it again\n");
} else {
if (dev->io == IO_NONE) {
if (!em28xx_request_buffers
(dev, EM28XX_NUM_READ_FRAMES)) {
em28xx_warn
("poll() failed, not enough memory\n");
} else {
dev->io = IO_READ;
dev->stream = STREAM_ON;
}
}
if (dev->io == IO_READ) {
em28xx_queue_unusedframes(dev);
poll_wait(filp, &dev->wait_frame, wait);
if (!list_empty(&dev->outqueue))
mask |= POLLIN | POLLRDNORM;
mutex_unlock(&dev->fileop_lock);
return mask;
}
}
mutex_unlock(&dev->fileop_lock);
return POLLERR;
}
/*
* em28xx_vm_open()
*/
static void em28xx_vm_open(struct vm_area_struct *vma)
{
struct em28xx_frame_t *f = vma->vm_private_data;
f->vma_use_count++;
}
/*
* em28xx_vm_close()
*/
static void em28xx_vm_close(struct vm_area_struct *vma)
{
/* NOTE: buffers are not freed here */
struct em28xx_frame_t *f = vma->vm_private_data;
f->vma_use_count--;
}
static struct vm_operations_struct em28xx_vm_ops = {
.open = em28xx_vm_open,
.close = em28xx_vm_close,
};
/*
* em28xx_v4l2_mmap()
*/
static int em28xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
{
unsigned long size = vma->vm_end - vma->vm_start,
start = vma->vm_start;
void *pos;
u32 i;
struct em28xx *dev = filp->private_data;
if (mutex_lock_interruptible(&dev->fileop_lock))
return -ERESTARTSYS;
if (dev->state & DEV_DISCONNECTED) {
em28xx_videodbg("mmap: device not present\n");
mutex_unlock(&dev->fileop_lock);
return -ENODEV;
}
if (dev->state & DEV_MISCONFIGURED) {
em28xx_videodbg ("mmap: Device is misconfigured; close and "
"open it again\n");
mutex_unlock(&dev->fileop_lock);
return -EIO;
}
if (dev->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
size != PAGE_ALIGN(dev->frame[0].buf.length)) {
mutex_unlock(&dev->fileop_lock);
return -EINVAL;
}
for (i = 0; i < dev->num_frames; i++) {
if ((dev->frame[i].buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff)
break;
}
if (i == dev->num_frames) {
em28xx_videodbg("mmap: user supplied mapping address is out of range\n");
mutex_unlock(&dev->fileop_lock);
return -EINVAL;
}
/* VM_IO is eventually going to replace PageReserved altogether */
vma->vm_flags |= VM_IO;
vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
pos = dev->frame[i].bufmem;
while (size > 0) { /* size is page-aligned */
if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
em28xx_videodbg("mmap: vm_insert_page failed\n");
mutex_unlock(&dev->fileop_lock);
return -EAGAIN;
}
start += PAGE_SIZE;
pos += PAGE_SIZE;
size -= PAGE_SIZE;
}
vma->vm_ops = &em28xx_vm_ops;
vma->vm_private_data = &dev->frame[i];
em28xx_vm_open(vma);
mutex_unlock(&dev->fileop_lock);
return 0;
}
/*
* em28xx_get_ctrl()
* return the current saturation, brightness or contrast, mute state
*/
static int em28xx_get_ctrl(struct em28xx *dev, struct v4l2_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = dev->mute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = dev->volume;
return 0;
default:
return -EINVAL;
}
}
/*
* em28xx_set_ctrl()
* mute or set new saturation, brightness or contrast
*/
static int em28xx_set_ctrl(struct em28xx *dev, const struct v4l2_control *ctrl)
{
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value != dev->mute) {
dev->mute = ctrl->value;
em28xx_audio_usb_mute(dev, 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;
}
}
/*
* em28xx_stream_interrupt()
* stops streaming
*/
static int em28xx_stream_interrupt(struct em28xx *dev)
{
int ret = 0;
/* stop reading from the device */
dev->stream = STREAM_INTERRUPT;
ret = wait_event_timeout(dev->wait_stream,
(dev->stream == STREAM_OFF) ||
(dev->state & DEV_DISCONNECTED),
EM28XX_URB_TIMEOUT);
if (dev->state & DEV_DISCONNECTED)
return -ENODEV;
else if (ret) {
dev->state |= DEV_MISCONFIGURED;
em28xx_videodbg("device is misconfigured; close and "
"open /dev/video%d again\n",
dev->vdev->minor-MINOR_VFL_TYPE_GRABBER_MIN);
return ret;
}
return 0;
}
static int em28xx_set_norm(struct em28xx *dev, int width, int height)
{
unsigned int hscale, vscale;
unsigned int maxh, maxw;
maxw = norm_maxw(dev);
maxh = norm_maxh(dev);
/* 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;
if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
hscale = 0x3fff;
width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
vscale = 0x3fff;
height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
/* set new image size */
dev->width = width;
dev->height = height;
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 = hscale;
dev->vscale = vscale;
em28xx_resolution_set(dev);
return 0;
}
static int em28xx_get_fmt(struct em28xx *dev, struct v4l2_format *format)
{
em28xx_videodbg("VIDIOC_G_FMT: type=%s\n",
(format->type ==V4L2_BUF_TYPE_VIDEO_CAPTURE) ?
"V4L2_BUF_TYPE_VIDEO_CAPTURE" :
(format->type ==V4L2_BUF_TYPE_VBI_CAPTURE) ?
"V4L2_BUF_TYPE_VBI_CAPTURE" :
(format->type ==V4L2_CAP_SLICED_VBI_CAPTURE) ?
"V4L2_BUF_TYPE_SLICED_VBI_CAPTURE " :
"not supported");
switch (format->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
{
format->fmt.pix.width = dev->width;
format->fmt.pix.height = dev->height;
format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
format->fmt.pix.bytesperline = dev->bytesperline;
format->fmt.pix.sizeimage = dev->frame_size;
format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
format->fmt.pix.field = dev->interlaced ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; /* FIXME: TOP? NONE? BOTTOM? ALTENATE? */
em28xx_videodbg("VIDIOC_G_FMT: %dx%d\n", dev->width,
dev->height);
break;
}
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
{
format->fmt.sliced.service_set=0;
em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
if (format->fmt.sliced.service_set==0)
return -EINVAL;
break;
}
default:
return -EINVAL;
}
return (0);
}
static int em28xx_set_fmt(struct em28xx *dev, unsigned int cmd, struct v4l2_format *format)
{
u32 i;
int ret = 0;
int width = format->fmt.pix.width;
int height = format->fmt.pix.height;
unsigned int hscale, vscale;
unsigned int maxh, maxw;
maxw = norm_maxw(dev);
maxh = norm_maxh(dev);
em28xx_videodbg("%s: type=%s\n",
cmd == VIDIOC_TRY_FMT ?
"VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
format->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ?
"V4L2_BUF_TYPE_VIDEO_CAPTURE" :
format->type == V4L2_BUF_TYPE_VBI_CAPTURE ?
"V4L2_BUF_TYPE_VBI_CAPTURE " :
"not supported");
if (format->type == V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) {
em28xx_i2c_call_clients(dev,VIDIOC_G_FMT,format);
if (format->fmt.sliced.service_set==0)
return -EINVAL;
return 0;
}
if (format->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
em28xx_videodbg("%s: requested %dx%d\n",
cmd == VIDIOC_TRY_FMT ?
"VIDIOC_TRY_FMT" : "VIDIOC_S_FMT",
format->fmt.pix.width, format->fmt.pix.height);
/* FIXME: Move some code away from here */
/* 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;
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;
}
if ((hscale = (((unsigned long)maxw) << 12) / width - 4096L) >= 0x4000)
hscale = 0x3fff;
width = (((unsigned long)maxw) << 12) / (hscale + 4096L);
if ((vscale = (((unsigned long)maxh) << 12) / height - 4096L) >= 0x4000)
vscale = 0x3fff;
height = (((unsigned long)maxh) << 12) / (vscale + 4096L);
format->fmt.pix.width = width;
format->fmt.pix.height = height;
format->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
format->fmt.pix.bytesperline = width * 2;
format->fmt.pix.sizeimage = width * 2 * height;
format->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
format->fmt.pix.field = V4L2_FIELD_INTERLACED;
em28xx_videodbg("%s: returned %dx%d (%d, %d)\n",
cmd == VIDIOC_TRY_FMT ?
"VIDIOC_TRY_FMT" :"VIDIOC_S_FMT",
format->fmt.pix.width, format->fmt.pix.height, hscale, vscale);
if (cmd == VIDIOC_TRY_FMT)
return 0;
for (i = 0; i < dev->num_frames; i++)
if (dev->frame[i].vma_use_count) {
em28xx_videodbg("VIDIOC_S_FMT failed. "
"Unmap the buffers first.\n");
return -EINVAL;
}
/* stop io in case it is already in progress */
if (dev->stream == STREAM_ON) {
em28xx_videodbg("VIDIOC_SET_FMT: interupting stream\n");
if ((ret = em28xx_stream_interrupt(dev)))
return ret;
}
em28xx_release_buffers(dev);
dev->io = IO_NONE;
/* set new image size */
dev->width = width;
dev->height = height;
dev->frame_size = dev->width * dev->height * 2;
dev->field_size = dev->frame_size >> 1;
dev->bytesperline = dev->width * 2;
dev->hscale = hscale;
dev->vscale = vscale;
em28xx_uninit_isoc(dev);
em28xx_set_alternate(dev);
em28xx_capture_start(dev, 1);
em28xx_resolution_set(dev);
em28xx_init_isoc(dev);
return 0;
}
/*
* em28xx_v4l2_do_ioctl()
* This function is _not_ called directly, but from
* em28xx_v4l2_ioctl. Userspace
* copying is done already, arg is a kernel pointer.
*/
static int em28xx_do_ioctl(struct inode *inode, struct file *filp,
struct em28xx *dev, unsigned int cmd, void *arg,
v4l2_kioctl driver_ioctl)
{
int ret;
switch (cmd) {
/* ---------- tv norms ---------- */
case VIDIOC_ENUMSTD:
{
struct v4l2_standard *e = arg;
unsigned int i;
i = e->index;
if (i >= TVNORMS)
return -EINVAL;
ret = v4l2_video_std_construct(e, tvnorms[e->index].id,
tvnorms[e->index].name);
e->index = i;
if (ret < 0)
return ret;
return 0;
}
case VIDIOC_G_STD:
{
v4l2_std_id *id = arg;
*id = dev->tvnorm->id;
return 0;
}
case VIDIOC_S_STD:
{
v4l2_std_id *id = arg;
unsigned int i;
for (i = 0; i < TVNORMS; i++)
if (*id == tvnorms[i].id)
break;
if (i == TVNORMS)
for (i = 0; i < TVNORMS; i++)
if (*id & tvnorms[i].id)
break;
if (i == TVNORMS)
return -EINVAL;
mutex_lock(&dev->lock);
dev->tvnorm = &tvnorms[i];
em28xx_set_norm(dev, dev->width, dev->height);
em28xx_i2c_call_clients(dev, VIDIOC_S_STD,
&dev->tvnorm->id);
mutex_unlock(&dev->lock);
return 0;
}
/* ------ input switching ---------- */
case VIDIOC_ENUMINPUT:
{
struct v4l2_input *i = arg;
unsigned int n;
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",
};
n = i->index;
if (n >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(n)->type)
return -EINVAL;
memset(i, 0, sizeof(*i));
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;
for (n = 0; n < ARRAY_SIZE(tvnorms); n++)
i->std |= tvnorms[n].id;
return 0;
}
case VIDIOC_G_INPUT:
{
int *i = arg;
*i = dev->ctl_input;
return 0;
}
case VIDIOC_S_INPUT:
{
int *index = arg;
if (*index >= MAX_EM28XX_INPUT)
return -EINVAL;
if (0 == INPUT(*index)->type)
return -EINVAL;
mutex_lock(&dev->lock);
video_mux(dev, *index);
mutex_unlock(&dev->lock);
return 0;
}
case VIDIOC_G_AUDIO:
{
struct v4l2_audio *a = arg;
unsigned int index = a->index;
if (a->index > 1)
return -EINVAL;
memset(a, 0, sizeof(*a));
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;
}
case VIDIOC_S_AUDIO:
{
struct v4l2_audio *a = arg;
if (a->index != dev->ctl_ainput)
return -EINVAL;
return 0;
}
/* --- controls ---------------------------------------------- */
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *qc = arg;
int i, id=qc->id;
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;
}
}
}
em28xx_i2c_call_clients(dev,cmd,qc);
if (qc->type)
return 0;
else
return -EINVAL;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *ctrl = arg;
int retval=-EINVAL;
if (!dev->has_msp34xx)
retval=em28xx_get_ctrl(dev, ctrl);
if (retval==-EINVAL) {
em28xx_i2c_call_clients(dev,cmd,arg);
return 0;
} else return retval;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl = arg;
u8 i;
if (!dev->has_msp34xx){
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)
return -ERANGE;
return em28xx_set_ctrl(dev, ctrl);
}
}
}
em28xx_i2c_call_clients(dev,cmd,arg);
return 0;
}
/* --- tuner ioctls ------------------------------------------ */
case VIDIOC_G_TUNER:
{
struct v4l2_tuner *t = arg;
if (0 != t->index)
return -EINVAL;
memset(t, 0, sizeof(*t));
strcpy(t->name, "Tuner");
mutex_lock(&dev->lock);
/* let clients fill in the remainder of this struct */
em28xx_i2c_call_clients(dev, cmd, t);
mutex_unlock(&dev->lock);
em28xx_videodbg("VIDIO_G_TUNER: signal=%x, afc=%x\n", t->signal,
t->afc);
return 0;
}
case VIDIOC_S_TUNER:
{
struct v4l2_tuner *t = arg;
if (0 != t->index)
return -EINVAL;
mutex_lock(&dev->lock);
/* let clients handle this */
em28xx_i2c_call_clients(dev, cmd, t);
mutex_unlock(&dev->lock);
return 0;
}
case VIDIOC_G_FREQUENCY:
{
struct v4l2_frequency *f = arg;
memset(f, 0, sizeof(*f));
f->type = V4L2_TUNER_ANALOG_TV;
f->frequency = dev->ctl_freq;
return 0;
}
case VIDIOC_S_FREQUENCY:
{
struct v4l2_frequency *f = arg;
if (0 != f->tuner)
return -EINVAL;
if (V4L2_TUNER_ANALOG_TV != f->type)
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;
}
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *cc = arg;
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;
}
case VIDIOC_STREAMON:
{
int *type = arg;
if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev->io != IO_MMAP)
return -EINVAL;
if (list_empty(&dev->inqueue))
return -EINVAL;
dev->stream = STREAM_ON; /* FIXME: Start video capture here? */
em28xx_videodbg("VIDIOC_STREAMON: starting stream\n");
return 0;
}
case VIDIOC_STREAMOFF:
{
int *type = arg;
int ret;
if (*type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev->io != IO_MMAP)
return -EINVAL;
if (dev->stream == STREAM_ON) {
em28xx_videodbg ("VIDIOC_STREAMOFF: interrupting stream\n");
if ((ret = em28xx_stream_interrupt(dev)))
return ret;
}
em28xx_empty_framequeues(dev);
return 0;
}
default:
return v4l_compat_translate_ioctl(inode, filp, cmd, arg,
driver_ioctl);
}
return 0;
}
/*
* em28xx_v4l2_do_ioctl()
* This function is _not_ called directly, but from
* em28xx_v4l2_ioctl. Userspace
* copying is done already, arg is a kernel pointer.
*/
static int em28xx_video_do_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, void *arg)
{
struct em28xx *dev = filp->private_data;
if (!dev)
return -ENODEV;
if (video_debug > 1)
v4l_print_ioctl(dev->name,cmd);
switch (cmd) {
/* --- capabilities ------------------------------------------ */
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *cap = arg;
memset(cap, 0, sizeof(*cap));
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->has_tuner)
cap->capabilities |= V4L2_CAP_TUNER;
return 0;
}
/* --- capture ioctls ---------------------------------------- */
case VIDIOC_ENUM_FMT:
{
struct v4l2_fmtdesc *fmtd = arg;
if (fmtd->index != 0)
return -EINVAL;
memset(fmtd, 0, sizeof(*fmtd));
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;
}
case VIDIOC_G_FMT:
return em28xx_get_fmt(dev, (struct v4l2_format *) arg);
case VIDIOC_TRY_FMT:
case VIDIOC_S_FMT:
return em28xx_set_fmt(dev, cmd, (struct v4l2_format *)arg);
case VIDIOC_REQBUFS:
{
struct v4l2_requestbuffers *rb = arg;
u32 i;
int ret;
if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
rb->memory != V4L2_MEMORY_MMAP)
return -EINVAL;
if (dev->io == IO_READ) {
em28xx_videodbg ("method is set to read;"
" close and open the device again to"
" choose the mmap I/O method\n");
return -EINVAL;
}
for (i = 0; i < dev->num_frames; i++)
if (dev->frame[i].vma_use_count) {
em28xx_videodbg ("VIDIOC_REQBUFS failed; previous buffers are still mapped\n");
return -EINVAL;
}
if (dev->stream == STREAM_ON) {
em28xx_videodbg("VIDIOC_REQBUFS: interrupting stream\n");
if ((ret = em28xx_stream_interrupt(dev)))
return ret;
}
em28xx_empty_framequeues(dev);
em28xx_release_buffers(dev);
if (rb->count)
rb->count =
em28xx_request_buffers(dev, rb->count);
dev->frame_current = NULL;
em28xx_videodbg ("VIDIOC_REQBUFS: setting io method to mmap: num bufs %i\n",
rb->count);
dev->io = rb->count ? IO_MMAP : IO_NONE;
return 0;
}
case VIDIOC_QUERYBUF:
{
struct v4l2_buffer *b = arg;
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
b->index >= dev->num_frames || dev->io != IO_MMAP)
return -EINVAL;
memcpy(b, &dev->frame[b->index].buf, sizeof(*b));
if (dev->frame[b->index].vma_use_count) {
b->flags |= V4L2_BUF_FLAG_MAPPED;
}
if (dev->frame[b->index].state == F_DONE)
b->flags |= V4L2_BUF_FLAG_DONE;
else if (dev->frame[b->index].state != F_UNUSED)
b->flags |= V4L2_BUF_FLAG_QUEUED;
return 0;
}
case VIDIOC_QBUF:
{
struct v4l2_buffer *b = arg;
unsigned long lock_flags;
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
b->index >= dev->num_frames || dev->io != IO_MMAP) {
return -EINVAL;
}
if (dev->frame[b->index].state != F_UNUSED) {
return -EAGAIN;
}
dev->frame[b->index].state = F_QUEUED;
/* add frame to fifo */
spin_lock_irqsave(&dev->queue_lock, lock_flags);
list_add_tail(&dev->frame[b->index].frame,
&dev->inqueue);
spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
return 0;
}
case VIDIOC_DQBUF:
{
struct v4l2_buffer *b = arg;
struct em28xx_frame_t *f;
unsigned long lock_flags;
int ret = 0;
if (b->type != V4L2_BUF_TYPE_VIDEO_CAPTURE
|| dev->io != IO_MMAP)
return -EINVAL;
if (list_empty(&dev->outqueue)) {
if (dev->stream == STREAM_OFF)
return -EINVAL;
if (filp->f_flags & O_NONBLOCK)
return -EAGAIN;
ret = wait_event_interruptible
(dev->wait_frame,
(!list_empty(&dev->outqueue)) ||
(dev->state & DEV_DISCONNECTED));
if (ret)
return ret;
if (dev->state & DEV_DISCONNECTED)
return -ENODEV;
}
spin_lock_irqsave(&dev->queue_lock, lock_flags);
f = list_entry(dev->outqueue.next,
struct em28xx_frame_t, frame);
list_del(dev->outqueue.next);
spin_unlock_irqrestore(&dev->queue_lock, lock_flags);
f->state = F_UNUSED;
memcpy(b, &f->buf, sizeof(*b));
if (f->vma_use_count)
b->flags |= V4L2_BUF_FLAG_MAPPED;
return 0;
}
default:
return em28xx_do_ioctl(inode, filp, dev, cmd, arg,
em28xx_video_do_ioctl);
}
return 0;
}
/*
* em28xx_v4l2_ioctl()
* handle v4l2 ioctl the main action happens in em28xx_v4l2_do_ioctl()
*/
static int em28xx_v4l2_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
int ret = 0;
struct em28xx *dev = filp->private_data;
if (mutex_lock_interruptible(&dev->fileop_lock))
return -ERESTARTSYS;
if (dev->state & DEV_DISCONNECTED) {
em28xx_errdev("v4l2 ioctl: device not present\n");
mutex_unlock(&dev->fileop_lock);
return -ENODEV;
}
if (dev->state & DEV_MISCONFIGURED) {
em28xx_errdev
("v4l2 ioctl: device is misconfigured; close and open it again\n");
mutex_unlock(&dev->fileop_lock);
return -EIO;
}
ret = video_usercopy(inode, filp, cmd, arg, em28xx_video_do_ioctl);
mutex_unlock(&dev->fileop_lock);
return ret;
}
static const struct file_operations em28xx_v4l_fops = {
.owner = THIS_MODULE,
.open = em28xx_v4l2_open,
.release = em28xx_v4l2_close,
.ioctl = em28xx_v4l2_ioctl,
.read = em28xx_v4l2_read,
.poll = em28xx_v4l2_poll,
.mmap = em28xx_v4l2_mmap,
.llseek = no_llseek,
.compat_ioctl = v4l_compat_ioctl32,
};
/******************************** usb interface *****************************************/
/*
* 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, int model)
{
struct em28xx *dev = *devhandle;
int retval = -ENOMEM;
int errCode, i;
unsigned int maxh, maxw;
dev->udev = udev;
dev->model = model;
mutex_init(&dev->lock);
init_waitqueue_head(&dev->open);
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[model].is_em2800;
dev->has_tuner = em28xx_boards[model].has_tuner;
dev->has_msp34xx = em28xx_boards[model].has_msp34xx;
dev->tda9887_conf = em28xx_boards[model].tda9887_conf;
dev->decoder = em28xx_boards[model].decoder;
if (tuner >= 0)
dev->tuner_type = tuner;
else
dev->tuner_type = em28xx_boards[model].tuner_type;
dev->video_inputs = em28xx_boards[model].vchannels;
for (i = 0; i < TVNORMS; i++)
if (em28xx_boards[model].norm == tvnorms[i].mode)
break;
if (i == TVNORMS)
i = 0;
dev->tvnorm = &tvnorms[i]; /* set default norm */
em28xx_videodbg("tvnorm=%s\n", dev->tvnorm->name);
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;
/* setup video picture settings for saa7113h */
memset(&dev->vpic, 0, sizeof(dev->vpic));
dev->vpic.colour = 128 << 8;
dev->vpic.hue = 128 << 8;
dev->vpic.brightness = 128 << 8;
dev->vpic.contrast = 192 << 8;
dev->vpic.whiteness = 128 << 8; /* This one isn't used */
dev->vpic.depth = 16;
dev->vpic.palette = VIDEO_PALETTE_YUV422;
em28xx_pre_card_setup(dev);
#ifdef CONFIG_MODULES
/* request some modules */
if (dev->decoder == EM28XX_SAA7113 || dev->decoder == EM28XX_SAA7114)
request_module("saa7115");
if (dev->decoder == EM28XX_TVP5150)
request_module("tvp5150");
if (dev->has_tuner)
request_module("tuner");
#endif
errCode = em28xx_config(dev);
if (errCode) {
em28xx_errdev("error configuring device\n");
em28xx_devused&=~(1<<dev->devno);
kfree(dev);
return -ENOMEM;
}
mutex_lock(&dev->lock);
/* register i2c bus */
em28xx_i2c_register(dev);
/* Do board specific init and eeprom reading */
em28xx_card_setup(dev);
/* configure the device */
em28xx_config_i2c(dev);
mutex_unlock(&dev->lock);
errCode = em28xx_config(dev);
#ifdef CONFIG_MODULES
if (dev->has_msp34xx)
request_module("msp3400");
#endif
/* allocate and fill v4l2 device struct */
dev->vdev = video_device_alloc();
if (NULL == dev->vdev) {
em28xx_errdev("cannot allocate video_device.\n");
em28xx_devused&=~(1<<dev->devno);
kfree(dev);
return -ENOMEM;
}
dev->vbi_dev = video_device_alloc();
if (NULL == dev->vbi_dev) {
em28xx_errdev("cannot allocate video_device.\n");
kfree(dev->vdev);
em28xx_devused&=~(1<<dev->devno);
kfree(dev);
return -ENOMEM;
}
/* Fills VBI device info */
dev->vbi_dev->type = VFL_TYPE_VBI;
dev->vbi_dev->hardware = 0;
dev->vbi_dev->fops = &em28xx_v4l_fops;
dev->vbi_dev->minor = -1;
dev->vbi_dev->dev = &dev->udev->dev;
dev->vbi_dev->release = video_device_release;
snprintf(dev->vbi_dev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
"em28xx",dev->devno,"vbi");
/* Fills CAPTURE device info */
dev->vdev->type = VID_TYPE_CAPTURE;
if (dev->has_tuner)
dev->vdev->type |= VID_TYPE_TUNER;
dev->vdev->hardware = 0;
dev->vdev->fops = &em28xx_v4l_fops;
dev->vdev->minor = -1;
dev->vdev->dev = &dev->udev->dev;
dev->vdev->release = video_device_release;
snprintf(dev->vdev->name, sizeof(dev->vbi_dev->name), "%s#%d %s",
"em28xx",dev->devno,"video");
list_add_tail(&dev->devlist,&em28xx_devlist);
/* register v4l2 device */
mutex_lock(&dev->lock);
if ((retval = video_register_device(dev->vdev, VFL_TYPE_GRABBER,
video_nr[dev->devno]))) {
em28xx_errdev("unable to register video device (error=%i).\n",
retval);
mutex_unlock(&dev->lock);
list_del(&dev->devlist);
video_device_release(dev->vdev);
em28xx_devused&=~(1<<dev->devno);
kfree(dev);
return -ENODEV;
}
if (video_register_device(dev->vbi_dev, VFL_TYPE_VBI,
vbi_nr[dev->devno]) < 0) {
printk("unable to register vbi device\n");
mutex_unlock(&dev->lock);
list_del(&dev->devlist);
video_device_release(dev->vbi_dev);
video_device_release(dev->vdev);
em28xx_devused&=~(1<<dev->devno);
kfree(dev);
return -ENODEV;
} else {
printk("registered VBI\n");
}
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);
mutex_unlock(&dev->lock);
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);
return 0;
}
/*
* 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 model,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;
}
model=id->driver_info;
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;
/* 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))
model=card[nr];
if ((model==EM2800_BOARD_UNKNOWN)||(model==EM2820_BOARD_UNKNOWN)) {
em28xx_errdev( "Your board has no eeprom inside it and thus can't\n"
"%s: be autodetected. Please pass card=<n> insmod option to\n"
"%s: workaround that. Redirect complaints to the vendor of\n"
"%s: the TV card. Generic type will be used."
"%s: Best regards,\n"
"%s: -- tux\n",
dev->name,dev->name,dev->name,dev->name,dev->name);
em28xx_errdev("%s: Here is a list of valid choices for the card=<n> insmod option:\n",
dev->name);
for (i = 0; i < em28xx_bcount; i++) {
em28xx_errdev(" card=%d -> %s\n", i,
em28xx_boards[i].name);
}
}
/* allocate device struct */
retval = em28xx_init_dev(&dev, udev, nr, model);
if (retval)
return retval;
em28xx_info("Found %s\n", em28xx_boards[model].name);
/* save our data pointer in this interface device */
usb_set_intfdata(interface, 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 = usb_get_intfdata(interface);
usb_set_intfdata(interface, NULL);
if (!dev)
return;
down_write(&em28xx_disconnect);
mutex_lock(&dev->lock);
em28xx_info("disconnecting %s\n", dev->vdev->name);
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);
if (!dev->users) {
kfree(dev->alt_max_pkt_size);
kfree(dev);
}
up_write(&em28xx_disconnect);
}
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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