hdpvr-control.c

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/*
 * Hauppauge HD PVR USB driver - video 4 linux 2 interface
 *
 * Copyright (C) 2008      Janne Grunau ([email protected])
 *
 *  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, version 2.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/mutex.h>

#include <linux/videodev2.h>

#include <media/v4l2-common.h>

#include "hdpvr.h"


int hdpvr_config_call(struct hdpvr_device *dev, uint value, u8 valbuf)
{
    int ret;
    char request_type = 0x38, snd_request = 0x01;

    mutex_lock(&dev->usbc_mutex);
    dev->usbc_buf[0] = valbuf;
    ret = usb_control_msg(dev->udev,
                  usb_sndctrlpipe(dev->udev, 0),
                  snd_request, 0x00 | request_type,
                  value, CTRL_DEFAULT_INDEX,
                  dev->usbc_buf, 1, 10000);

    mutex_unlock(&dev->usbc_mutex);
    v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
         "config call request for value 0x%x returned %d\n", value,
         ret);

    return ret < 0 ? ret : 0;
}

struct hdpvr_video_info *get_video_info(struct hdpvr_device *dev)
{
    struct hdpvr_video_info *vidinf = NULL;
#ifdef HDPVR_DEBUG
    char print_buf[15];
#endif
    int ret;

    vidinf = kzalloc(sizeof(struct hdpvr_video_info), GFP_KERNEL);
    if (!vidinf) {
        v4l2_err(&dev->v4l2_dev, "out of memory\n");
        goto err;
    }

    mutex_lock(&dev->usbc_mutex);
    ret = usb_control_msg(dev->udev,
                  usb_rcvctrlpipe(dev->udev, 0),
                  0x81, 0x80 | 0x38,
                  0x1400, 0x0003,
                  dev->usbc_buf, 5,
                  1000);
    if (ret == 5) {
        vidinf->width   = dev->usbc_buf[1] << 8 | dev->usbc_buf[0];
        vidinf->height  = dev->usbc_buf[3] << 8 | dev->usbc_buf[2];
        vidinf->fps = dev->usbc_buf[4];
    }

#ifdef HDPVR_DEBUG
    if (hdpvr_debug & MSG_INFO) {
        hex_dump_to_buffer(dev->usbc_buf, 5, 16, 1, print_buf,
                   sizeof(print_buf), 0);
        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
             "get video info returned: %d, %s\n", ret, print_buf);
    }
#endif
    mutex_unlock(&dev->usbc_mutex);

    if (!vidinf->width || !vidinf->height || !vidinf->fps) {
        kfree(vidinf);
        vidinf = NULL;
    }
err:
    return vidinf;
}

int get_input_lines_info(struct hdpvr_device *dev)
{
#ifdef HDPVR_DEBUG
    char print_buf[9];
#endif
    int ret, lines;

    mutex_lock(&dev->usbc_mutex);
    ret = usb_control_msg(dev->udev,
                  usb_rcvctrlpipe(dev->udev, 0),
                  0x81, 0x80 | 0x38,
                  0x1800, 0x0003,
                  dev->usbc_buf, 3,
                  1000);

#ifdef HDPVR_DEBUG
    if (hdpvr_debug & MSG_INFO) {
        hex_dump_to_buffer(dev->usbc_buf, 3, 16, 1, print_buf,
                   sizeof(print_buf), 0);
        v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
             "get input lines info returned: %d, %s\n", ret,
             print_buf);
    }
#else
    (void)ret;  /* suppress compiler warning */
#endif
    lines = dev->usbc_buf[1] << 8 | dev->usbc_buf[0];
    mutex_unlock(&dev->usbc_mutex);
    return lines;
}


int hdpvr_set_bitrate(struct hdpvr_device *dev)
{
    int ret;

    mutex_lock(&dev->usbc_mutex);
    memset(dev->usbc_buf, 0, 4);
    dev->usbc_buf[0] = dev->options.bitrate;
    dev->usbc_buf[2] = dev->options.peak_bitrate;

    ret = usb_control_msg(dev->udev,
                  usb_sndctrlpipe(dev->udev, 0),
                  0x01, 0x38, CTRL_BITRATE_VALUE,
                  CTRL_DEFAULT_INDEX, dev->usbc_buf, 4, 1000);
    mutex_unlock(&dev->usbc_mutex);

    return ret;
}

int hdpvr_set_audio(struct hdpvr_device *dev, u8 input,
            enum v4l2_mpeg_audio_encoding codec)
{
    int ret = 0;

    if (dev->flags & HDPVR_FLAG_AC3_CAP) {
        mutex_lock(&dev->usbc_mutex);
        memset(dev->usbc_buf, 0, 2);
        dev->usbc_buf[0] = input;
        if (codec == V4L2_MPEG_AUDIO_ENCODING_AAC)
            dev->usbc_buf[1] = 0;
        else if (codec == V4L2_MPEG_AUDIO_ENCODING_AC3)
            dev->usbc_buf[1] = 1;
        else {
            mutex_unlock(&dev->usbc_mutex);
            v4l2_err(&dev->v4l2_dev, "invalid audio codec %d\n",
                 codec);
            ret = -EINVAL;
            goto error;
        }

        ret = usb_control_msg(dev->udev,
                      usb_sndctrlpipe(dev->udev, 0),
                      0x01, 0x38, CTRL_AUDIO_INPUT_VALUE,
                      CTRL_DEFAULT_INDEX, dev->usbc_buf, 2,
                      1000);
        mutex_unlock(&dev->usbc_mutex);
        if (ret == 2)
            ret = 0;
    } else
        ret = hdpvr_config_call(dev, CTRL_AUDIO_INPUT_VALUE, input);
error:
    return ret;
}

int hdpvr_set_options(struct hdpvr_device *dev)
{
    hdpvr_config_call(dev, CTRL_VIDEO_STD_TYPE, dev->options.video_std);

    hdpvr_config_call(dev, CTRL_VIDEO_INPUT_VALUE,
             dev->options.video_input+1);

    hdpvr_set_audio(dev, dev->options.audio_input+1,
               dev->options.audio_codec);

    hdpvr_set_bitrate(dev);
    hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
             dev->options.bitrate_mode);
    hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, dev->options.gop_mode);

    hdpvr_config_call(dev, CTRL_BRIGHTNESS, dev->options.brightness);
    hdpvr_config_call(dev, CTRL_CONTRAST,   dev->options.contrast);
    hdpvr_config_call(dev, CTRL_HUE,        dev->options.hue);
    hdpvr_config_call(dev, CTRL_SATURATION, dev->options.saturation);
    hdpvr_config_call(dev, CTRL_SHARPNESS,  dev->options.sharpness);

    return 0;
}