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

   1/*
   2 *
   3 *
   4 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   5 *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License as published by
   9 *  the Free Software Foundation; either version 2 of the License
  10 *
  11 *  This program is distributed in the hope that it will be useful,
  12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *  GNU General Public License for more details.
  15 *
  16 */
  17
  18/*
  19
  20   This source file is specifically designed to interface with the
  21   saa711x support that is available in the v4l available starting
  22   with linux 2.6.15.
  23
  24*/
  25
  26#include "pvrusb2-video-v4l.h"
  27
  28
  29
  30#include "pvrusb2-hdw-internal.h"
  31#include "pvrusb2-debug.h"
  32#include <linux/videodev2.h>
  33#include <media/v4l2-common.h>
  34#include <media/i2c/saa7115.h>
  35#include <linux/errno.h>
  36
  37struct routing_scheme {
  38        const int *def;
  39        unsigned int cnt;
  40};
  41
  42
  43static const int routing_scheme0[] = {
  44        [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  45        /* In radio mode, we mute the video, but point at one
  46           spot just to stay consistent */
  47        [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  48        [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
  49        [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
  50};
  51
  52static const struct routing_scheme routing_def0 = {
  53        .def = routing_scheme0,
  54        .cnt = ARRAY_SIZE(routing_scheme0),
  55};
  56
  57static const int routing_scheme1[] = {
  58        [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  59        [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  60        [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
  61        [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
  62};
  63
  64static const struct routing_scheme routing_def1 = {
  65        .def = routing_scheme1,
  66        .cnt = ARRAY_SIZE(routing_scheme1),
  67};
  68
  69static const struct routing_scheme *routing_schemes[] = {
  70        [PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
  71        [PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
  72};
  73
  74void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
  75{
  76        if (hdw->input_dirty || hdw->force_dirty) {
  77                const struct routing_scheme *sp;
  78                unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  79                u32 input;
  80
  81                pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
  82                           hdw->input_val);
  83
  84                sp = (sid < ARRAY_SIZE(routing_schemes)) ?
  85                        routing_schemes[sid] : NULL;
  86                if ((sp == NULL) ||
  87                    (hdw->input_val < 0) ||
  88                    (hdw->input_val >= sp->cnt)) {
  89                        pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  90                                   "*** WARNING *** subdev v4l2 set_input: Invalid routing scheme (%u) and/or input (%d)",
  91                                   sid, hdw->input_val);
  92                        return;
  93                }
  94                input = sp->def[hdw->input_val];
  95                sd->ops->video->s_routing(sd, input, 0, 0);
  96        }
  97}
  98