saa7134-empress.c

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/*
 *
 * (c) 2004 Gerd Knorr <[email protected]> [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/delay.h>

#include "saa7134-reg.h"
#include "saa7134.h"

#include <media/saa6752hs.h>
#include <media/v4l2-common.h>
#include <media/v4l2-chip-ident.h>

/* ------------------------------------------------------------------ */

MODULE_AUTHOR("Gerd Knorr <[email protected]> [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)
{
    u32 leading_null_bytes = 0;

    /* If more cards start to need this, then this
       should probably be added to the card definitions. */
    switch (dev->board) {
    case SAA7134_BOARD_BEHOLD_M6:
    case SAA7134_BOARD_BEHOLD_M63:
    case SAA7134_BOARD_BEHOLD_M6_EXTRA:
        leading_null_bytes = 1;
        break;
    }
    ts_reset_encoder(dev);
    saa_call_all(dev, core, init, leading_null_bytes);
    dev->empress_started = 1;
    return 0;
}

/* ------------------------------------------------------------------ */

static int ts_open(struct file *file)
{
    struct video_device *vdev = video_devdata(file);
    struct saa7134_dev *dev = video_drvdata(file);
    int err;

    dprintk("open dev=%s\n", video_device_node_name(vdev));
    err = -EBUSY;
    if (!mutex_trylock(&dev->empress_tsq.vb_lock))
        return err;
    if (atomic_read(&dev->empress_users))
        goto done;

    /* Unmute audio */
    saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
        saa_readb(SAA7134_AUDIO_MUTE_CTRL) & ~(1 << 6));

    atomic_inc(&dev->empress_users);
    file->private_data = dev;
    err = 0;

done:
    mutex_unlock(&dev->empress_tsq.vb_lock);
    return err;
}

static int ts_release(struct file *file)
{
    struct saa7134_dev *dev = file->private_data;

    videobuf_stop(&dev->empress_tsq);
    videobuf_mmap_free(&dev->empress_tsq);

    /* stop the encoder */
    ts_reset_encoder(dev);

    /* Mute audio */
    saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
        saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));

    atomic_dec(&dev->empress_users);

    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->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_vid_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_vid_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct saa7134_dev *dev = file->private_data;
    struct v4l2_mbus_framefmt mbus_fmt;

    saa_call_all(dev, video, g_mbus_fmt, &mbus_fmt);

    v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
    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_vid_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct saa7134_dev *dev = file->private_data;
    struct v4l2_mbus_framefmt mbus_fmt;

    v4l2_fill_mbus_format(&mbus_fmt, &f->fmt.pix, V4L2_MBUS_FMT_FIXED);
    saa_call_all(dev, video, s_mbus_fmt, &mbus_fmt);
    v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);

    f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
    f->fmt.pix.sizeimage    = TS_PACKET_SIZE * dev->ts.nr_packets;

    return 0;
}

static int empress_try_fmt_vid_cap(struct file *file, void *priv,
                struct v4l2_format *f)
{
    struct saa7134_dev *dev = file->private_data;

    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_dev *dev = file->private_data;

    return videobuf_reqbufs(&dev->empress_tsq, p);
}

static int empress_querybuf(struct file *file, void *priv,
                    struct v4l2_buffer *b)
{
    struct saa7134_dev *dev = file->private_data;

    return videobuf_querybuf(&dev->empress_tsq, b);
}

static int empress_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
    struct saa7134_dev *dev = file->private_data;

    return videobuf_qbuf(&dev->empress_tsq, b);
}

static int empress_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
    struct saa7134_dev *dev = file->private_data;

    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_dev *dev = file->private_data;

    return videobuf_streamon(&dev->empress_tsq);
}

static int empress_streamoff(struct file *file, void *priv,
                    enum v4l2_buf_type type)
{
    struct saa7134_dev *dev = file->private_data;

    return videobuf_streamoff(&dev->empress_tsq);
}

static int empress_s_ext_ctrls(struct file *file, void *priv,
                   struct v4l2_ext_controls *ctrls)
{
    struct saa7134_dev *dev = file->private_data;
    int err;

    /* 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;

    err = saa_call_empress(dev, core, s_ext_ctrls, ctrls);
    ts_init_encoder(dev);

    return err;
}

static int empress_g_ext_ctrls(struct file *file, void *priv,
                   struct v4l2_ext_controls *ctrls)
{
    struct saa7134_dev *dev = file->private_data;

    if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
        return -EINVAL;
    return saa_call_empress(dev, core, g_ext_ctrls, ctrls);
}

static int empress_g_ctrl(struct file *file, void *priv,
                    struct v4l2_control *c)
{
    struct saa7134_dev *dev = file->private_data;

    return saa7134_g_ctrl_internal(dev, NULL, c);
}

static int empress_s_ctrl(struct file *file, void *priv,
                    struct v4l2_control *c)
{
    struct saa7134_dev *dev = file->private_data;

    return saa7134_s_ctrl_internal(dev, NULL, c);
}

static int empress_queryctrl(struct file *file, void *priv,
                    struct v4l2_queryctrl *c)
{
    /* Must be sorted from low to high control ID! */
    static const u32 user_ctrls[] = {
        V4L2_CID_USER_CLASS,
        V4L2_CID_BRIGHTNESS,
        V4L2_CID_CONTRAST,
        V4L2_CID_SATURATION,
        V4L2_CID_HUE,
        V4L2_CID_AUDIO_VOLUME,
        V4L2_CID_AUDIO_MUTE,
        V4L2_CID_HFLIP,
        0
    };

    /* Must be sorted from low to high control ID! */
    static const u32 mpeg_ctrls[] = {
        V4L2_CID_MPEG_CLASS,
        V4L2_CID_MPEG_STREAM_TYPE,
        V4L2_CID_MPEG_STREAM_PID_PMT,
        V4L2_CID_MPEG_STREAM_PID_AUDIO,
        V4L2_CID_MPEG_STREAM_PID_VIDEO,
        V4L2_CID_MPEG_STREAM_PID_PCR,
        V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
        V4L2_CID_MPEG_AUDIO_ENCODING,
        V4L2_CID_MPEG_AUDIO_L2_BITRATE,
        V4L2_CID_MPEG_VIDEO_ENCODING,
        V4L2_CID_MPEG_VIDEO_ASPECT,
        V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
        V4L2_CID_MPEG_VIDEO_BITRATE,
        V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
        0
    };
    static const u32 *ctrl_classes[] = {
        user_ctrls,
        mpeg_ctrls,
        NULL
    };
    struct saa7134_dev *dev = file->private_data;

    c->id = v4l2_ctrl_next(ctrl_classes, c->id);
    if (c->id == 0)
        return -EINVAL;
    if (c->id == V4L2_CID_USER_CLASS || c->id == V4L2_CID_MPEG_CLASS)
        return v4l2_ctrl_query_fill(c, 0, 0, 0, 0);
    if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
        return saa7134_queryctrl(file, priv, c);
    return saa_call_empress(dev, core, queryctrl, c);
}

static int empress_querymenu(struct file *file, void *priv,
                    struct v4l2_querymenu *c)
{
    struct saa7134_dev *dev = file->private_data;

    if (V4L2_CTRL_ID2CLASS(c->id) != V4L2_CTRL_CLASS_MPEG)
        return -EINVAL;
    return saa_call_empress(dev, core, querymenu, c);
}

static int empress_g_chip_ident(struct file *file, void *fh,
           struct v4l2_dbg_chip_ident *chip)
{
    struct saa7134_dev *dev = file->private_data;

    chip->ident = V4L2_IDENT_NONE;
    chip->revision = 0;
    if (chip->match.type == V4L2_CHIP_MATCH_I2C_DRIVER &&
        !strcmp(chip->match.name, "saa6752hs"))
        return saa_call_empress(dev, core, g_chip_ident, chip);
    if (chip->match.type == V4L2_CHIP_MATCH_I2C_ADDR)
        return saa_call_empress(dev, core, g_chip_ident, chip);
    return -EINVAL;
}

static int empress_s_std(struct file *file, void *priv, v4l2_std_id *id)
{
    struct saa7134_dev *dev = file->private_data;

    return saa7134_s_std_internal(dev, NULL, id);
}

static int empress_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
    struct saa7134_dev *dev = file->private_data;

    *id = dev->tvnorm->id;
    return 0;
}

static const struct v4l2_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,
};

static const struct v4l2_ioctl_ops ts_ioctl_ops = {
    .vidioc_querycap        = empress_querycap,
    .vidioc_enum_fmt_vid_cap    = empress_enum_fmt_vid_cap,
    .vidioc_try_fmt_vid_cap     = empress_try_fmt_vid_cap,
    .vidioc_s_fmt_vid_cap       = empress_s_fmt_vid_cap,
    .vidioc_g_fmt_vid_cap       = empress_g_fmt_vid_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       = empress_queryctrl,
    .vidioc_querymenu       = empress_querymenu,
    .vidioc_g_ctrl          = empress_g_ctrl,
    .vidioc_s_ctrl          = empress_s_ctrl,
    .vidioc_g_chip_ident        = empress_g_chip_ident,
    .vidioc_s_std           = empress_s_std,
    .vidioc_g_std           = empress_g_std,
};

/* ----------------------------------------------------------- */

static struct video_device saa7134_empress_template = {
    .name          = "saa7134-empress",
    .fops          = &ts_fops,
    .ioctl_ops     = &ts_ioctl_ops,

    .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");
    } else {
        dprintk("video signal acquired\n");
    }
}

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->parent  = &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);

    video_set_drvdata(dev->empress_dev, 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 %s [mpeg]\n",
           dev->name, video_device_node_name(dev->empress_dev));

    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, NULL);

    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_work(&dev->empress_workqueue);
    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:
 */