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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pvrusb2-video-v4l.c (2321B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 *
      4 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
      5 *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
      6 */
      7
      8/*
      9
     10   This source file is specifically designed to interface with the
     11   saa711x support that is available in the v4l available starting
     12   with linux 2.6.15.
     13
     14*/
     15
     16#include "pvrusb2-video-v4l.h"
     17
     18
     19
     20#include "pvrusb2-hdw-internal.h"
     21#include "pvrusb2-debug.h"
     22#include <linux/videodev2.h>
     23#include <media/v4l2-common.h>
     24#include <media/i2c/saa7115.h>
     25#include <linux/errno.h>
     26
     27struct routing_scheme {
     28	const int *def;
     29	unsigned int cnt;
     30};
     31
     32
     33static const int routing_scheme0[] = {
     34	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
     35	/* In radio mode, we mute the video, but point at one
     36	   spot just to stay consistent */
     37	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
     38	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
     39	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
     40};
     41
     42static const struct routing_scheme routing_def0 = {
     43	.def = routing_scheme0,
     44	.cnt = ARRAY_SIZE(routing_scheme0),
     45};
     46
     47static const int routing_scheme1[] = {
     48	[PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
     49	[PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
     50	[PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
     51	[PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
     52};
     53
     54static const struct routing_scheme routing_def1 = {
     55	.def = routing_scheme1,
     56	.cnt = ARRAY_SIZE(routing_scheme1),
     57};
     58
     59static const struct routing_scheme *routing_schemes[] = {
     60	[PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
     61	[PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
     62};
     63
     64void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
     65{
     66	if (hdw->input_dirty || hdw->force_dirty) {
     67		const struct routing_scheme *sp;
     68		unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
     69		u32 input;
     70
     71		pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
     72			   hdw->input_val);
     73
     74		sp = (sid < ARRAY_SIZE(routing_schemes)) ?
     75			routing_schemes[sid] : NULL;
     76		if ((sp == NULL) ||
     77		    (hdw->input_val < 0) ||
     78		    (hdw->input_val >= sp->cnt)) {
     79			pvr2_trace(PVR2_TRACE_ERROR_LEGS,
     80				   "*** WARNING *** subdev v4l2 set_input: Invalid routing scheme (%u) and/or input (%d)",
     81				   sid, hdw->input_val);
     82			return;
     83		}
     84		input = sp->def[hdw->input_val];
     85		sd->ops->video->s_routing(sd, input, 0, 0);
     86	}
     87}