release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/video/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  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 /*
  23
  24    This source file is specifically designed to interface with the
  25    saa711x support that is available in the v4l available starting
  26    with linux 2.6.15.
  27
  28 */
  29
  30 #include "pvrusb2-video-v4l.h"
  31
  32
  33
  34 #include "pvrusb2-hdw-internal.h"
  35 #include "pvrusb2-debug.h"
  36 #include <linux/videodev2.h>
  37 #include <media/v4l2-common.h>
  38 #include <media/saa7115.h>
  39 #include <linux/errno.h>
  40
  41 struct routing_scheme {
  42         const int *def;
  43         unsigned int cnt;
  44 };
  45
  46
  47 static const int routing_scheme0[] = {
  48         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  49         /* In radio mode, we mute the video, but point at one
  50            spot just to stay consistent */
  51         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  52         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
  53         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
  54 };
  55
  56 static const struct routing_scheme routing_def0 = {
  57         .def = routing_scheme0,
  58         .cnt = ARRAY_SIZE(routing_scheme0),
  59 };
  60
  61 static const int routing_scheme1[] = {
  62         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  63         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  64         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
  65         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
  66 };
  67
  68 static const struct routing_scheme routing_def1 = {
  69         .def = routing_scheme1,
  70         .cnt = ARRAY_SIZE(routing_scheme1),
  71 };
  72
  73 static const struct routing_scheme *routing_schemes[] = {
  74         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
  75         [PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
  76 };
  77
  78 void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
  79 {
  80         if (hdw->input_dirty || hdw->force_dirty) {
  81                 const struct routing_scheme *sp;
  82                 unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  83                 u32 input;
  84
  85                 pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
  86                            hdw->input_val);
  87
  88                 sp = (sid < ARRAY_SIZE(routing_schemes)) ?
  89                         routing_schemes[sid] : NULL;
  90                 if ((sp == NULL) ||
  91                     (hdw->input_val < 0) ||
  92                     (hdw->input_val >= sp->cnt)) {
  93                         pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  94                                    "*** WARNING *** subdev v4l2 set_input:"
  95                                    " Invalid routing scheme (%u)"
  96                                    " and/or input (%d)",
  97                                    sid, hdw->input_val);
  98                         return;
  99                 }
 100                 input = sp->def[hdw->input_val];
 101                 sd->ops->video->s_routing(sd, input, 0, 0);
 102         }
 103 }
 104
 105
 106 /*
 107   Stuff for Emacs to see, in order to encourage consistent editing style:
 108   *** Local Variables: ***
 109   *** mode: c ***
 110   *** fill-column: 70 ***
 111   *** tab-width: 8 ***
 112   *** c-basic-offset: 8 ***
 113   *** End: ***
 114   */