// SPDX-License-Identifier: GPL-2.0-only
/*
 * Hauppauge HD PVR USB driver - video 4 linux 2 interface
 *
 * Copyright (C) 2008      Janne Grunau (j@jannau.net)
 */

#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;
}

int get_video_info(struct hdpvr_device *dev, struct hdpvr_video_info *vidinf)
{
        int ret;

        vidinf->valid = false;
        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);

#ifdef HDPVR_DEBUG
        if (hdpvr_debug & MSG_INFO)
                v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
                         "get video info returned: %d, %5ph\n", ret,
                         dev->usbc_buf);
#endif
        mutex_unlock(&dev->usbc_mutex);

        if (ret < 0)
                return ret;

        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];
        vidinf->valid   = vidinf->width && vidinf->height && vidinf->fps;

        return 0;
}

int get_input_lines_info(struct hdpvr_device *dev)
{
        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)
                v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
                         "get input lines info returned: %d, %3ph\n", ret,
                         dev->usbc_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;
}