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 #include <linux/slab.h>
  41
  42 struct routing_scheme {
  43         const int *def;
  44         unsigned int cnt;
  45 };
  46
  47
  48 static const int routing_scheme0[] = {
  49         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  50         /* In radio mode, we mute the video, but point at one
  51            spot just to stay consistent */
  52         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  53         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
  54         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
  55 };
  56
  57 static const struct routing_scheme routing_def0 = {
  58         .def = routing_scheme0,
  59         .cnt = ARRAY_SIZE(routing_scheme0),
  60 };
  61
  62 static const int routing_scheme1[] = {
  63         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  64         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  65         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE3,
  66         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2, /* or SVIDEO0, it seems */
  67 };
  68
  69 static const struct routing_scheme routing_def1 = {
  70         .def = routing_scheme1,
  71         .cnt = ARRAY_SIZE(routing_scheme1),
  72 };
  73
  74 static const struct routing_scheme *routing_schemes[] = {
  75         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = &routing_def0,
  76         [PVR2_ROUTING_SCHEME_ONAIR] = &routing_def1,
  77 };
  78
  79 void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
  80 {
  81         if (hdw->input_dirty || hdw->force_dirty) {
  82                 const struct routing_scheme *sp;
  83                 unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  84                 u32 input;
  85
  86                 pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
  87                            hdw->input_val);
  88
  89                 sp = (sid < ARRAY_SIZE(routing_schemes)) ?
  90                         routing_schemes[sid] : NULL;
  91                 if ((sp == NULL) ||
  92                     (hdw->input_val < 0) ||
  93                     (hdw->input_val >= sp->cnt)) {
  94                         pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  95                                    "*** WARNING *** subdev v4l2 set_input:"
  96                                    " Invalid routing scheme (%u)"
  97                                    " and/or input (%d)",
  98                                    sid, hdw->input_val);
  99                         return;
 100                 }
 101                 input = sp->def[hdw->input_val];
 102                 sd->ops->video->s_routing(sd, input, 0, 0);
 103         }
 104 }
 105
 106
 107 /*
 108   Stuff for Emacs to see, in order to encourage consistent editing style:
 109   *** Local Variables: ***
 110   *** mode: c ***
 111   *** fill-column: 70 ***
 112   *** tab-width: 8 ***
 113   *** c-basic-offset: 8 ***
 114   *** End: ***
 115   */