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
  37 struct routing_scheme {
  38         const int *def;
  39         unsigned int cnt;
  40 };
  41
  42
  43 static 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
  52 static const struct routing_scheme routing_def0 = {
  53         .def = routing_scheme0,
  54         .cnt = ARRAY_SIZE(routing_scheme0),
  55 };
  56
  57 static 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
  64 static const struct routing_scheme routing_def1 = {
  65         .def = routing_scheme1,
  66         .cnt = ARRAY_SIZE(routing_scheme1),
  67 };
  68
  69 static const struct routing_scheme *routing_schemes[] = {
  70         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
  71         [PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
  72 };
  73
  74 void 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 }