cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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hdpvr-control.c (4500B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Hauppauge HD PVR USB driver - video 4 linux 2 interface
      4 *
      5 * Copyright (C) 2008      Janne Grunau (j@jannau.net)
      6 */
      7
      8#include <linux/kernel.h>
      9#include <linux/errno.h>
     10#include <linux/init.h>
     11#include <linux/slab.h>
     12#include <linux/module.h>
     13#include <linux/usb.h>
     14#include <linux/mutex.h>
     15
     16#include <linux/videodev2.h>
     17
     18#include <media/v4l2-common.h>
     19
     20#include "hdpvr.h"
     21
     22
     23int hdpvr_config_call(struct hdpvr_device *dev, uint value, u8 valbuf)
     24{
     25	int ret;
     26	char request_type = 0x38, snd_request = 0x01;
     27
     28	mutex_lock(&dev->usbc_mutex);
     29	dev->usbc_buf[0] = valbuf;
     30	ret = usb_control_msg(dev->udev,
     31			      usb_sndctrlpipe(dev->udev, 0),
     32			      snd_request, 0x00 | request_type,
     33			      value, CTRL_DEFAULT_INDEX,
     34			      dev->usbc_buf, 1, 10000);
     35
     36	mutex_unlock(&dev->usbc_mutex);
     37	v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
     38		 "config call request for value 0x%x returned %d\n", value,
     39		 ret);
     40
     41	return ret < 0 ? ret : 0;
     42}
     43
     44int get_video_info(struct hdpvr_device *dev, struct hdpvr_video_info *vidinf)
     45{
     46	int ret;
     47
     48	vidinf->valid = false;
     49	mutex_lock(&dev->usbc_mutex);
     50	ret = usb_control_msg(dev->udev,
     51			      usb_rcvctrlpipe(dev->udev, 0),
     52			      0x81, 0x80 | 0x38,
     53			      0x1400, 0x0003,
     54			      dev->usbc_buf, 5,
     55			      1000);
     56
     57#ifdef HDPVR_DEBUG
     58	if (hdpvr_debug & MSG_INFO)
     59		v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
     60			 "get video info returned: %d, %5ph\n", ret,
     61			 dev->usbc_buf);
     62#endif
     63	mutex_unlock(&dev->usbc_mutex);
     64
     65	if (ret < 0)
     66		return ret;
     67
     68	vidinf->width	= dev->usbc_buf[1] << 8 | dev->usbc_buf[0];
     69	vidinf->height	= dev->usbc_buf[3] << 8 | dev->usbc_buf[2];
     70	vidinf->fps	= dev->usbc_buf[4];
     71	vidinf->valid   = vidinf->width && vidinf->height && vidinf->fps;
     72
     73	return 0;
     74}
     75
     76int get_input_lines_info(struct hdpvr_device *dev)
     77{
     78	int ret, lines;
     79
     80	mutex_lock(&dev->usbc_mutex);
     81	ret = usb_control_msg(dev->udev,
     82			      usb_rcvctrlpipe(dev->udev, 0),
     83			      0x81, 0x80 | 0x38,
     84			      0x1800, 0x0003,
     85			      dev->usbc_buf, 3,
     86			      1000);
     87
     88#ifdef HDPVR_DEBUG
     89	if (hdpvr_debug & MSG_INFO)
     90		v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
     91			 "get input lines info returned: %d, %3ph\n", ret,
     92			 dev->usbc_buf);
     93#else
     94	(void)ret;	/* suppress compiler warning */
     95#endif
     96	lines = dev->usbc_buf[1] << 8 | dev->usbc_buf[0];
     97	mutex_unlock(&dev->usbc_mutex);
     98	return lines;
     99}
    100
    101
    102int hdpvr_set_bitrate(struct hdpvr_device *dev)
    103{
    104	int ret;
    105
    106	mutex_lock(&dev->usbc_mutex);
    107	memset(dev->usbc_buf, 0, 4);
    108	dev->usbc_buf[0] = dev->options.bitrate;
    109	dev->usbc_buf[2] = dev->options.peak_bitrate;
    110
    111	ret = usb_control_msg(dev->udev,
    112			      usb_sndctrlpipe(dev->udev, 0),
    113			      0x01, 0x38, CTRL_BITRATE_VALUE,
    114			      CTRL_DEFAULT_INDEX, dev->usbc_buf, 4, 1000);
    115	mutex_unlock(&dev->usbc_mutex);
    116
    117	return ret;
    118}
    119
    120int hdpvr_set_audio(struct hdpvr_device *dev, u8 input,
    121		    enum v4l2_mpeg_audio_encoding codec)
    122{
    123	int ret = 0;
    124
    125	if (dev->flags & HDPVR_FLAG_AC3_CAP) {
    126		mutex_lock(&dev->usbc_mutex);
    127		memset(dev->usbc_buf, 0, 2);
    128		dev->usbc_buf[0] = input;
    129		if (codec == V4L2_MPEG_AUDIO_ENCODING_AAC)
    130			dev->usbc_buf[1] = 0;
    131		else if (codec == V4L2_MPEG_AUDIO_ENCODING_AC3)
    132			dev->usbc_buf[1] = 1;
    133		else {
    134			mutex_unlock(&dev->usbc_mutex);
    135			v4l2_err(&dev->v4l2_dev, "invalid audio codec %d\n",
    136				 codec);
    137			ret = -EINVAL;
    138			goto error;
    139		}
    140
    141		ret = usb_control_msg(dev->udev,
    142				      usb_sndctrlpipe(dev->udev, 0),
    143				      0x01, 0x38, CTRL_AUDIO_INPUT_VALUE,
    144				      CTRL_DEFAULT_INDEX, dev->usbc_buf, 2,
    145				      1000);
    146		mutex_unlock(&dev->usbc_mutex);
    147		if (ret == 2)
    148			ret = 0;
    149	} else
    150		ret = hdpvr_config_call(dev, CTRL_AUDIO_INPUT_VALUE, input);
    151error:
    152	return ret;
    153}
    154
    155int hdpvr_set_options(struct hdpvr_device *dev)
    156{
    157	hdpvr_config_call(dev, CTRL_VIDEO_STD_TYPE, dev->options.video_std);
    158
    159	hdpvr_config_call(dev, CTRL_VIDEO_INPUT_VALUE,
    160			 dev->options.video_input+1);
    161
    162	hdpvr_set_audio(dev, dev->options.audio_input+1,
    163		       dev->options.audio_codec);
    164
    165	hdpvr_set_bitrate(dev);
    166	hdpvr_config_call(dev, CTRL_BITRATE_MODE_VALUE,
    167			 dev->options.bitrate_mode);
    168	hdpvr_config_call(dev, CTRL_GOP_MODE_VALUE, dev->options.gop_mode);
    169
    170	hdpvr_config_call(dev, CTRL_BRIGHTNESS, dev->options.brightness);
    171	hdpvr_config_call(dev, CTRL_CONTRAST,   dev->options.contrast);
    172	hdpvr_config_call(dev, CTRL_HUE,        dev->options.hue);
    173	hdpvr_config_call(dev, CTRL_SATURATION, dev->options.saturation);
    174	hdpvr_config_call(dev, CTRL_SHARPNESS,  dev->options.sharpness);
    175
    176	return 0;
    177}