kernel/2.6.29.6-aldebaran-rt/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 #include "pvrusb2-i2c-cmd-v4l2.h"
  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 pvr2_v4l_decoder {
  43         struct pvr2_i2c_handler handler;
  44         struct pvr2_decoder_ctrl ctrl;
  45         struct pvr2_i2c_client *client;
  46         struct pvr2_hdw *hdw;
  47         unsigned long stale_mask;
  48 };
  49
  50
  51 struct routing_scheme {
  52         const int *def;
  53         unsigned int cnt;
  54 };
  55
  56
  57 static const int routing_scheme0[] = {
  58         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  59         /* In radio mode, we mute the video, but point at one
  60            spot just to stay consistent */
  61         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  62         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
  63         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
  64 };
  65
  66 static const struct routing_scheme routing_schemes[] = {
  67         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
  68                 .def = routing_scheme0,
  69                 .cnt = ARRAY_SIZE(routing_scheme0),
  70         },
  71 };
  72
  73 static void set_input(struct pvr2_v4l_decoder *ctxt)
  74 {
  75         struct pvr2_hdw *hdw = ctxt->hdw;
  76         struct v4l2_routing route;
  77         const struct routing_scheme *sp;
  78         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  79
  80         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
  81
  82         if ((sid < ARRAY_SIZE(routing_schemes)) &&
  83             ((sp = routing_schemes + sid) != NULL) &&
  84             (hdw->input_val >= 0) &&
  85             (hdw->input_val < sp->cnt)) {
  86                 route.input = sp->def[hdw->input_val];
  87         } else {
  88                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  89                            "*** WARNING *** i2c v4l2 set_input:"
  90                            " Invalid routing scheme (%u) and/or input (%d)",
  91                            sid,hdw->input_val);
  92                 return;
  93         }
  94
  95         route.output = 0;
  96         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
  97 }
  98
  99
 100 static int check_input(struct pvr2_v4l_decoder *ctxt)
 101 {
 102         struct pvr2_hdw *hdw = ctxt->hdw;
 103         return hdw->input_dirty != 0;
 104 }
 105
 106
 107 static void set_audio(struct pvr2_v4l_decoder *ctxt)
 108 {
 109         u32 val;
 110         struct pvr2_hdw *hdw = ctxt->hdw;
 111
 112         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
 113                    hdw->srate_val);
 114         switch (hdw->srate_val) {
 115         default:
 116         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 117                 val = 48000;
 118                 break;
 119         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 120                 val = 44100;
 121                 break;
 122         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 123                 val = 32000;
 124                 break;
 125         }
 126         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 127 }
 128
 129
 130 static int check_audio(struct pvr2_v4l_decoder *ctxt)
 131 {
 132         struct pvr2_hdw *hdw = ctxt->hdw;
 133         return hdw->srate_dirty != 0;
 134 }
 135
 136
 137 struct pvr2_v4l_decoder_ops {
 138         void (*update)(struct pvr2_v4l_decoder *);
 139         int (*check)(struct pvr2_v4l_decoder *);
 140 };
 141
 142
 143 static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
 144         { .update = set_input, .check = check_input},
 145         { .update = set_audio, .check = check_audio},
 146 };
 147
 148
 149 static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
 150 {
 151         ctxt->client->handler = NULL;
 152         pvr2_hdw_set_decoder(ctxt->hdw,NULL);
 153         kfree(ctxt);
 154 }
 155
 156
 157 static int decoder_check(struct pvr2_v4l_decoder *ctxt)
 158 {
 159         unsigned long msk;
 160         unsigned int idx;
 161
 162         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 163                 msk = 1 << idx;
 164                 if (ctxt->stale_mask & msk) continue;
 165                 if (decoder_ops[idx].check(ctxt)) {
 166                         ctxt->stale_mask |= msk;
 167                 }
 168         }
 169         return ctxt->stale_mask != 0;
 170 }
 171
 172
 173 static void decoder_update(struct pvr2_v4l_decoder *ctxt)
 174 {
 175         unsigned long msk;
 176         unsigned int idx;
 177
 178         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 179                 msk = 1 << idx;
 180                 if (!(ctxt->stale_mask & msk)) continue;
 181                 ctxt->stale_mask &= ~msk;
 182                 decoder_ops[idx].update(ctxt);
 183         }
 184 }
 185
 186
 187 static int decoder_detect(struct pvr2_i2c_client *cp)
 188 {
 189         /* Attempt to query the decoder - let's see if it will answer */
 190         struct v4l2_tuner vt;
 191         int ret;
 192
 193         memset(&vt,0,sizeof(vt));
 194         ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
 195         return ret == 0; /* Return true if it answered */
 196 }
 197
 198
 199 static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
 200 {
 201         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
 202         pvr2_v4l2_cmd_stream(ctxt->client,fl);
 203 }
 204
 205
 206 static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt)
 207 {
 208         return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
 209 }
 210
 211
 212 static const struct pvr2_i2c_handler_functions hfuncs = {
 213         .detach = (void (*)(void *))decoder_detach,
 214         .check = (int (*)(void *))decoder_check,
 215         .update = (void (*)(void *))decoder_update,
 216         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 217 };
 218
 219
 220 int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
 221                                struct pvr2_i2c_client *cp)
 222 {
 223         struct pvr2_v4l_decoder *ctxt;
 224
 225         if (hdw->decoder_ctrl) return 0;
 226         if (cp->handler) return 0;
 227         if (!decoder_detect(cp)) return 0;
 228
 229         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 230         if (!ctxt) return 0;
 231
 232         ctxt->handler.func_data = ctxt;
 233         ctxt->handler.func_table = &hfuncs;
 234         ctxt->ctrl.ctxt = ctxt;
 235         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 236         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 237         ctxt->client = cp;
 238         ctxt->hdw = hdw;
 239         ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
 240         pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
 241         cp->handler = &ctxt->handler;
 242         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
 243                    cp->client->addr);
 244         return !0;
 245 }
 246
 247
 248
 249
 250 /*
 251   Stuff for Emacs to see, in order to encourage consistent editing style:
 252   *** Local Variables: ***
 253   *** mode: c ***
 254   *** fill-column: 70 ***
 255   *** tab-width: 8 ***
 256   *** c-basic-offset: 8 ***
 257   *** End: ***
 258   */