LXR linux/drivers/media/usb/pvrusb2/pvrusb2-video-v4l.c

   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}
  88