/*
*
* (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/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include "saa7134-reg.h"
#include "saa7134.h"
#include <media/saa6752hs.h>
#include <media/v4l2-common.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;
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)
{
struct v4l2_ext_controls ctrls = { V4L2_CTRL_CLASS_MPEG, 0 };
ts_reset_encoder(dev);
saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, &ctrls);
dev->empress_started = 1;
return 0;
}
/* ------------------------------------------------------------------ */
static int ts_open(struct inode *inode, struct file *file)
{
int minor = iminor(inode);
struct saa7134_dev *dev;
int err;
list_for_each_entry(dev, &saa7134_devlist, devlist)
if (dev->empress_dev && dev->empress_dev->minor == minor)
goto found;
return -ENODEV;
found:
dprintk("open minor=%d\n",minor);
err = -EBUSY;
if (!mutex_trylock(&dev->empress_tsq.vb_lock))
goto done;
if (dev->empress_users)
goto done_up;
/* Unmute audio */
saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));
dev->empress_users++;
file->private_data = dev;
err = 0;
done_up:
mutex_unlock(&dev->empress_tsq.vb_lock);
done:
return err;
}
static int ts_release(struct inode *inode, struct file *file)
{
struct saa7134_dev *dev = file->private_data;
videobuf_stop(&dev->empress_tsq);
videobuf_mmap_free(&dev->empress_tsq);
dev->empress_users--;
/* stop the encoder */
ts_reset_encoder(dev);
/* Mute audio */
saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
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 empress_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct saa7134_dev *dev = file->private_data;
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;
}
static int empress_enum_input(struct file *file, void *priv,
struct v4l2_input *i)
{
if (i->index != 0)
return -EINVAL;
i->type = V4L2_INPUT_TYPE_CAMERA;
strcpy(i->name, "CCIR656");
return 0;
}
static int empress_g_input(struct file *file, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int empress_s_input(struct file *file, void *priv, unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int empress_enum_fmt_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
if (f->index != 0)
return -EINVAL;
strlcpy(f->description, "MPEG TS", sizeof(f->description));
f->pixelformat = V4L2_PIX_FMT_MPEG;
return 0;
}
static int empress_g_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
saa7134_i2c_call_clients(dev, VIDIOC_G_FMT, f);
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
return 0;
}
static int empress_s_fmt_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
saa7134_i2c_call_clients(dev, VIDIOC_S_FMT, f);
f->fmt.pix.pixelformat = V4L2_PIX_FMT_MPEG;
f->fmt.pix.sizeimage = TS_PACKET_SIZE * dev->ts.nr_packets;
return 0;
}
static int empress_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *p)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_reqbufs(&dev->empress_tsq, p);
}
static int empress_querybuf(struct file *file, void *priv,
struct v4l2_buffer *b)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_querybuf(&dev->empress_tsq, b);
}
static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_qbuf(&dev->empress_tsq, b);
}
static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_dqbuf(&dev->empress_tsq, b,
file->f_flags & O_NONBLOCK);
}
static int empress_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_streamon(&dev->empress_tsq);
}
static int empress_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
return videobuf_streamoff(&dev->empress_tsq);
}
static int empress_s_ext_ctrls(struct file *file, void *priv,
struct v4l2_ext_controls *ctrls)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
/* count == 0 is abused in saa6752hs.c, so that special
case is handled here explicitly. */
if (ctrls->count == 0)
return 0;
if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
return -EINVAL;
saa7134_i2c_call_clients(dev, VIDIOC_S_EXT_CTRLS, ctrls);
ts_init_encoder(dev);
return 0;
}
static int empress_g_ext_ctrls(struct file *file, void *priv,
struct v4l2_ext_controls *ctrls)
{
struct saa7134_fh *fh = priv;
struct saa7134_dev *dev = fh->dev;
if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
return -EINVAL;
saa7134_i2c_call_clients(dev, VIDIOC_G_EXT_CTRLS, ctrls);
return 0;
}
static const struct file_operations ts_fops =
{
.owner = THIS_MODULE,
.open = ts_open,
.release = ts_release,
.read = ts_read,
.poll = ts_poll,
.mmap = ts_mmap,
.ioctl = video_ioctl2,
.llseek = no_llseek,
};
/* ----------------------------------------------------------- */
static struct video_device saa7134_empress_template =
{
.name = "saa7134-empress",
.type = 0 /* FIXME */,
.type2 = 0 /* FIXME */,
.fops = &ts_fops,
.minor = -1,
.vidioc_querycap = empress_querycap,
.vidioc_enum_fmt_cap = empress_enum_fmt_cap,
.vidioc_s_fmt_cap = empress_s_fmt_cap,
.vidioc_g_fmt_cap = empress_g_fmt_cap,
.vidioc_reqbufs = empress_reqbufs,
.vidioc_querybuf = empress_querybuf,
.vidioc_qbuf = empress_qbuf,
.vidioc_dqbuf = empress_dqbuf,
.vidioc_streamon = empress_streamon,
.vidioc_streamoff = empress_streamoff,
.vidioc_s_ext_ctrls = empress_s_ext_ctrls,
.vidioc_g_ext_ctrls = empress_g_ext_ctrls,
.vidioc_enum_input = empress_enum_input,
.vidioc_g_input = empress_g_input,
.vidioc_s_input = empress_s_input,
.vidioc_queryctrl = saa7134_queryctrl,
.vidioc_g_ctrl = saa7134_g_ctrl,
.vidioc_s_ctrl = saa7134_s_ctrl,
.tvnorms = SAA7134_NORMS,
.current_norm = V4L2_STD_PAL,
};
static void empress_signal_update(struct work_struct *work)
{
struct saa7134_dev* dev =
container_of(work, struct saa7134_dev, empress_workqueue);
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,__func__);
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);
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_sg_init(&dev->empress_tsq, &saa7134_ts_qops,
&dev->pci->dev, &dev->slock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
V4L2_FIELD_ALTERNATE,
sizeof(struct saa7134_buf),
dev);
empress_signal_update(&dev->empress_workqueue);
return 0;
}
static int empress_fini(struct saa7134_dev *dev)
{
dprintk("%s: %s\n",dev->name,__func__);
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:
*/
