git.oblomov.eu Git - linux-2.6/blob - 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 #include "pvrusb2-i2c-cmd-v4l2.h"
  34
  35 #include "pvrusb2-hdw-internal.h"
  36 #include "pvrusb2-debug.h"
  37 #include <linux/videodev2.h>
  38 #include <media/v4l2-common.h>
  39 #include <media/saa7115.h>
  40 #include <linux/errno.h>
  41 #include <linux/slab.h>
  42
  43 struct routing_scheme {
  44         const int *def;
  45         unsigned int cnt;
  46 };
  47
  48
  49 static const int routing_scheme0[] = {
  50         [PVR2_CVAL_INPUT_TV] = SAA7115_COMPOSITE4,
  51         /* In radio mode, we mute the video, but point at one
  52            spot just to stay consistent */
  53         [PVR2_CVAL_INPUT_RADIO] = SAA7115_COMPOSITE5,
  54         [PVR2_CVAL_INPUT_COMPOSITE] = SAA7115_COMPOSITE5,
  55         [PVR2_CVAL_INPUT_SVIDEO] =  SAA7115_SVIDEO2,
  56 };
  57
  58 static const struct routing_scheme routing_schemes[] = {
  59         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
  60                 .def = routing_scheme0,
  61                 .cnt = ARRAY_SIZE(routing_scheme0),
  62         },
  63 };
  64
  65 struct pvr2_v4l_decoder {
  66         struct pvr2_i2c_handler handler;
  67         struct pvr2_decoder_ctrl ctrl;
  68         struct pvr2_i2c_client *client;
  69         struct pvr2_hdw *hdw;
  70         unsigned long stale_mask;
  71 };
  72
  73
  74
  75 static void set_input(struct pvr2_v4l_decoder *ctxt)
  76 {
  77         struct pvr2_hdw *hdw = ctxt->hdw;
  78         struct v4l2_routing route;
  79         const struct routing_scheme *sp;
  80         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  81
  82         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
  83
  84         if ((sid < ARRAY_SIZE(routing_schemes)) &&
  85             ((sp = routing_schemes + sid) != NULL) &&
  86             (hdw->input_val >= 0) &&
  87             (hdw->input_val < sp->cnt)) {
  88                 route.input = sp->def[hdw->input_val];
  89         } else {
  90                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  91                            "*** WARNING *** i2c v4l2 set_input:"
  92                            " Invalid routing scheme (%u) and/or input (%d)",
  93                            sid,hdw->input_val);
  94                 return;
  95         }
  96
  97         route.output = 0;
  98         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
  99 }
 100
 101
 102 static int check_input(struct pvr2_v4l_decoder *ctxt)
 103 {
 104         struct pvr2_hdw *hdw = ctxt->hdw;
 105         return hdw->input_dirty != 0;
 106 }
 107
 108
 109 static void set_audio(struct pvr2_v4l_decoder *ctxt)
 110 {
 111         u32 val;
 112         struct pvr2_hdw *hdw = ctxt->hdw;
 113
 114         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_audio %d",
 115                    hdw->srate_val);
 116         switch (hdw->srate_val) {
 117         default:
 118         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 119                 val = 48000;
 120                 break;
 121         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 122                 val = 44100;
 123                 break;
 124         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 125                 val = 32000;
 126                 break;
 127         }
 128         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 129 }
 130
 131
 132 static int check_audio(struct pvr2_v4l_decoder *ctxt)
 133 {
 134         struct pvr2_hdw *hdw = ctxt->hdw;
 135         return hdw->srate_dirty != 0;
 136 }
 137
 138
 139 struct pvr2_v4l_decoder_ops {
 140         void (*update)(struct pvr2_v4l_decoder *);
 141         int (*check)(struct pvr2_v4l_decoder *);
 142 };
 143
 144
 145 static const struct pvr2_v4l_decoder_ops decoder_ops[] = {
 146         { .update = set_input, .check = check_input},
 147         { .update = set_audio, .check = check_audio},
 148 };
 149
 150
 151 static void decoder_detach(struct pvr2_v4l_decoder *ctxt)
 152 {
 153         ctxt->client->handler = NULL;
 154         pvr2_hdw_set_decoder(ctxt->hdw,NULL);
 155         kfree(ctxt);
 156 }
 157
 158
 159 static int decoder_check(struct pvr2_v4l_decoder *ctxt)
 160 {
 161         unsigned long msk;
 162         unsigned int idx;
 163
 164         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 165                 msk = 1 << idx;
 166                 if (ctxt->stale_mask & msk) continue;
 167                 if (decoder_ops[idx].check(ctxt)) {
 168                         ctxt->stale_mask |= msk;
 169                 }
 170         }
 171         return ctxt->stale_mask != 0;
 172 }
 173
 174
 175 static void decoder_update(struct pvr2_v4l_decoder *ctxt)
 176 {
 177         unsigned long msk;
 178         unsigned int idx;
 179
 180         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 181                 msk = 1 << idx;
 182                 if (!(ctxt->stale_mask & msk)) continue;
 183                 ctxt->stale_mask &= ~msk;
 184                 decoder_ops[idx].update(ctxt);
 185         }
 186 }
 187
 188
 189 static int decoder_detect(struct pvr2_i2c_client *cp)
 190 {
 191         /* Attempt to query the decoder - let's see if it will answer */
 192         struct v4l2_tuner vt;
 193         int ret;
 194
 195         memset(&vt,0,sizeof(vt));
 196         ret = pvr2_i2c_client_cmd(cp,VIDIOC_G_TUNER,&vt);
 197         return ret == 0; /* Return true if it answered */
 198 }
 199
 200
 201 static void decoder_enable(struct pvr2_v4l_decoder *ctxt,int fl)
 202 {
 203         pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 decoder_enable(%d)",fl);
 204         pvr2_v4l2_cmd_stream(ctxt->client,fl);
 205 }
 206
 207
 208 static unsigned int decoder_describe(struct pvr2_v4l_decoder *ctxt,char *buf,unsigned int cnt)
 209 {
 210         return scnprintf(buf,cnt,"handler: pvrusb2-video-v4l");
 211 }
 212
 213
 214 static const struct pvr2_i2c_handler_functions hfuncs = {
 215         .detach = (void (*)(void *))decoder_detach,
 216         .check = (int (*)(void *))decoder_check,
 217         .update = (void (*)(void *))decoder_update,
 218         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 219 };
 220
 221
 222 int pvr2_i2c_decoder_v4l_setup(struct pvr2_hdw *hdw,
 223                                struct pvr2_i2c_client *cp)
 224 {
 225         struct pvr2_v4l_decoder *ctxt;
 226
 227         if (hdw->decoder_ctrl) return 0;
 228         if (cp->handler) return 0;
 229         if (!decoder_detect(cp)) return 0;
 230
 231         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 232         if (!ctxt) return 0;
 233
 234         ctxt->handler.func_data = ctxt;
 235         ctxt->handler.func_table = &hfuncs;
 236         ctxt->ctrl.ctxt = ctxt;
 237         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 238         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 239         ctxt->client = cp;
 240         ctxt->hdw = hdw;
 241         ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
 242         pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
 243         cp->handler = &ctxt->handler;
 244         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x saa711x V4L2 handler set up",
 245                    cp->client->addr);
 246         return !0;
 247 }
 248
 249
 250 void pvr2_saa7115_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
 251 {
 252         if (hdw->input_dirty || hdw->force_dirty) {
 253                 struct v4l2_routing route;
 254                 const struct routing_scheme *sp;
 255                 unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
 256                 pvr2_trace(PVR2_TRACE_CHIPS, "subdev v4l2 set_input(%d)",
 257                            hdw->input_val);
 258                 if ((sid < ARRAY_SIZE(routing_schemes)) &&
 259                     ((sp = routing_schemes + sid) != NULL) &&
 260                     (hdw->input_val >= 0) &&
 261                     (hdw->input_val < sp->cnt)) {
 262                         route.input = sp->def[hdw->input_val];
 263                 } else {
 264                         pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 265                                    "*** WARNING *** subdev v4l2 set_input:"
 266                                    " Invalid routing scheme (%u)"
 267                                    " and/or input (%d)",
 268                                    sid, hdw->input_val);
 269                         return;
 270                 }
 271                 route.output = 0;
 272                 sd->ops->video->s_routing(sd, &route);
 273         }
 274 }
 275
 276
 277 /*
 278   Stuff for Emacs to see, in order to encourage consistent editing style:
 279   *** Local Variables: ***
 280   *** mode: c ***
 281   *** fill-column: 70 ***
 282   *** tab-width: 8 ***
 283   *** c-basic-offset: 8 ***
 284   *** End: ***
 285   */