/*
* $Id: saa7134-empress.c,v 1.11 2005/05/22 19:23:39 nsh Exp $
*
* (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]
*
* 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/moduleparam.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "saa7134-reg.h"
#include "saa7134.h"
#include <media/saa6752hs.h>
/* ------------------------------------------------------------------ */
MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
MODULE_LICENSE("GPL");
static unsigned int empress_nr[] = {[0 ... (SAA7134_MAXBOARDS - 1)] = UNSET };
module_param_array(empress_nr, int, NULL, 0444);
MODULE_PARM_DESC(empress_nr,"ts device number");
static unsigned int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,"enable debug messages");
#define dprintk(fmt, arg...) if (debug) \
printk(KERN_DEBUG "%s/empress: " fmt, dev->name , ## arg)
/* ------------------------------------------------------------------ */
static void ts_reset_encoder(struct saa7134_dev* dev)
{
if (!dev->empress_started)
return;
saa_writeb(SAA7134_SPECIAL_MODE, 0x00);
msleep(10);
saa_writeb(SAA7134_SPECIAL_MODE, 0x01);
msleep(100);
dev->empress_started = 0;
}
static int ts_init_encoder(struct saa7134_dev* dev)
{
ts_reset_encoder(dev);
saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, NULL);
dev->empress_started = 1;
return 0;
}
/* ------------------------------------------------------------------ */
static int ts_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct saa7134_dev *h,*dev = NULL;
struct list_head *list;
int err;
list_for_each(list,&saa7134_devlist) {
h = list_entry(list, struct saa7134_dev, devlist);
if (h->empress_dev && h->empress_dev->minor == minor)
dev = h;
}
if (NULL == dev)
return -ENODEV;
dprintk("open minor=%d\n",minor);
err = -EBUSY;
if (down_trylock(&dev->empress_tsq.lock))
goto done;
if (dev->empress_users)
goto done_up;
dev->empress_users++;
file->private_data = dev;
err = 0;
done_up:
up(&dev->empress_tsq.lock);
done:
return err;
}
static int ts_release(struct inode *inode, struct file *file)
{
struct saa7134_dev *dev = file->private_data;
if (dev->empress_tsq.streaming)
videobuf_streamoff(&dev->empress_tsq);
down(&dev->empress_tsq.lock);
if (dev->empress_tsq.reading)
videobuf_read_stop(&dev->empress_tsq);
videobuf_mmap_free(&dev->empress_tsq);
dev->empress_users--;
/* stop the encoder */
ts_reset_encoder(dev);
up(&dev->empress_tsq.lock);
return 0;
}
static ssize_t
ts_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
{
struct saa7134_dev *dev = file->private_data;
if (!dev->empress_started)
ts_init_encoder(dev);
return videobuf_read_stream(&dev->empress_tsq,
data, count, ppos, 0,
file->f_flags & O_NONBLOCK);
}
static unsigned int
ts_poll(struct file *file, struct poll_table_struct *wait)
{
struct saa7134_dev *dev = file->private_data;
return videobuf_poll_stream(file, &dev->empress_tsq, wait);
}
static int
ts_mmap(struct file *file, struct vm_area_struct * vma)
{
struct saa7134_dev *dev = file->private_data;
return videobuf_mmap_mapper(&dev->empress_tsq, vma);
}
/*
* This function is _not_ called directly, but from
* video_generic_ioctl (and maybe others). userspace
* copying is done already, arg is a kernel pointer.
*/
static int ts_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
struct saa7134_dev *dev = file->private_data;
if (debug > 1)
saa7134_print_ioctl(dev->name,cmd);
switch (cmd) {
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *cap = arg;
memset(cap,0,sizeof(*cap));
strcpy(cap->driver, "saa7134");
strlcpy(cap->card, saa7134_boards[dev->board].name,
sizeof(cap->card));
sprintf(cap->bus_info,"PCI:%s",pci_name(dev->pci));
cap->version = SAA7134_VERSION_CODE;
cap->capabilities =
V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_READWRITE |
V4L2_CAP_STREAMING;
return 0;
}
/* --- input switching --------------------------------------- */
case VIDIOC_ENUMINPUT:
{
struct v4l2_input *i = arg;
if (i->index != 0)
return -EINVAL;
i->type = V4L2_INPUT_TYPE_CAMERA;
strcpy(i->name,"CCIR656");
return 0;
}
case VIDIOC_G_INPUT:
{
int *i = arg;
*i = 0;
return 0;
}
case VIDIOC_S_INPUT:
{
int *i = arg;
if (*i != 0)
return -EINVAL;
return 0;
}
/* --- capture ioctls ---------------------------------------- */
case VIDIOC_ENUM_FMT:
{
struct v4l2_fmtdesc *f = arg;
int index;
index = f->index;
if (index != 0)
return -EINVAL;
memset(f,0,sizeof(*f));
f->index = index;
strlcpy(f->description, "MPEG TS", sizeof(f->description));
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
f->pixelformat = V4L2_PIX_FMT_MPEG;
return 0;
}
case VIDIOC_G_FMT:
{
struct v4l2_format *f = arg;
memset(f,0,sizeof(*f));
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
saa7134_i2c_call_clients(dev, cmd, arg);
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
return 0;
}
case VIDIOC_S_FMT:
{
struct v4l2_format *f = arg;
if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
saa7134_i2c_call_clients(dev, cmd, arg);
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
f->fmt.pix.sizeimage = TS_PACKET_SIZE* dev->ts.nr_packets;
return 0;
}
case VIDIOC_REQBUFS:
return videobuf_reqbufs(&dev->empress_tsq,arg);
case VIDIOC_QUERYBUF:
return videobuf_querybuf(&dev->empress_tsq,arg);
case VIDIOC_QBUF:
return videobuf_qbuf(&dev->empress_tsq,arg);
case VIDIOC_DQBUF:
return videobuf_dqbuf(&dev->empress_tsq,arg,
file->f_flags & O_NONBLOCK);
case VIDIOC_STREAMON:
return videobuf_streamon(&dev->empress_tsq);
case VIDIOC_STREAMOFF:
return videobuf_streamoff(&dev->empress_tsq);
case VIDIOC_QUERYCTRL:
case VIDIOC_G_CTRL:
case VIDIOC_S_CTRL:
return saa7134_common_ioctl(dev, cmd, arg);
case VIDIOC_S_MPEGCOMP:
saa7134_i2c_call_clients(dev, VIDIOC_S_MPEGCOMP, arg);
ts_init_encoder(dev);
return 0;
case VIDIOC_G_MPEGCOMP:
saa7134_i2c_call_clients(dev, VIDIOC_G_MPEGCOMP, arg);
return 0;
default:
return -ENOIOCTLCMD;
}
return 0;
}
static int ts_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(inode, file, cmd, arg, ts_do_ioctl);
}
static struct file_operations ts_fops =
{
.owner = THIS_MODULE,
.open = ts_open,
.release = ts_release,
.read = ts_read,
.poll = ts_poll,
.mmap = ts_mmap,
.ioctl = ts_ioctl,
.llseek = no_llseek,
};
/* ----------------------------------------------------------- */
static struct video_device saa7134_empress_template =
{
.name = "saa7134-empress",
.type = 0 /* FIXME */,
.type2 = 0 /* FIXME */,
.hardware = 0,
.fops = &ts_fops,
.minor = -1,
};
static void empress_signal_update(void* data)
{
struct saa7134_dev* dev = (struct saa7134_dev*) data;
if (dev->nosignal) {
dprintk("no video signal\n");
ts_reset_encoder(dev);
} else {
dprintk("video signal acquired\n");
if (dev->empress_users)
ts_init_encoder(dev);
}
}
static void empress_signal_change(struct saa7134_dev *dev)
{
schedule_work(&dev->empress_workqueue);
}
static int empress_init(struct saa7134_dev *dev)
{
int err;
dprintk("%s: %s\n",dev->name,__FUNCTION__);
dev->empress_dev = video_device_alloc();
if (NULL == dev->empress_dev)
return -ENOMEM;
*(dev->empress_dev) = saa7134_empress_template;
dev->empress_dev->dev = &dev->pci->dev;
dev->empress_dev->release = video_device_release;
snprintf(dev->empress_dev->name, sizeof(dev->empress_dev->name),
"%s empress (%s)", dev->name,
saa7134_boards[dev->board].name);
INIT_WORK(&dev->empress_workqueue, empress_signal_update, (void*) dev);
err = video_register_device(dev->empress_dev,VFL_TYPE_GRABBER,
empress_nr[dev->nr]);
if (err < 0) {
printk(KERN_INFO "%s: can't register video device\n",
dev->name);
video_device_release(dev->empress_dev);
dev->empress_dev = NULL;
return err;
}
printk(KERN_INFO "%s: registered device video%d [mpeg]\n",
dev->name,dev->empress_dev->minor & 0x1f);
videobuf_queue_init(&dev->empress_tsq, &saa7134_ts_qops,
dev->pci, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_ALTERNATE,
sizeof(struct saa7134_buf),
dev);
empress_signal_update(dev);
return 0;
}
static int empress_fini(struct saa7134_dev *dev)
{
dprintk("%s: %s\n",dev->name,__FUNCTION__);
if (NULL == dev->empress_dev)
return 0;
flush_scheduled_work();
video_unregister_device(dev->empress_dev);
dev->empress_dev = NULL;
return 0;
}
static struct saa7134_mpeg_ops empress_ops = {
.type = SAA7134_MPEG_EMPRESS,
.init = empress_init,
.fini = empress_fini,
.signal_change = empress_signal_change,
};
static int __init empress_register(void)
{
return saa7134_ts_register(&empress_ops);
}
static void __exit empress_unregister(void)
{
saa7134_ts_unregister(&empress_ops);
}
module_init(empress_register);
module_exit(empress_unregister);
/* ----------------------------------------------------------- */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
