drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c

   1 /*
   2  *
   3  *  $Id$
   4  *
   5  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
   6  *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  */
  22
  23 /*
  24
  25    This source file is specifically designed to interface with the
  26    cx2584x, in kernels 2.6.16 or newer.
  27
  28 */
  29
  30 #include "pvrusb2-cx2584x-v4l.h"
  31 #include "pvrusb2-video-v4l.h"
  32 #include "pvrusb2-i2c-cmd-v4l2.h"
  33
  34
  35 #include "pvrusb2-hdw-internal.h"
  36 #include "pvrusb2-debug.h"
  37 #include <media/cx25840.h>
  38 #include <linux/videodev2.h>
  39 #include <media/v4l2-common.h>
  40 #include <linux/errno.h>
  41 #include <linux/slab.h>
  42
  43 struct pvr2_v4l_cx2584x {
  44         struct pvr2_i2c_handler handler;
  45         struct pvr2_decoder_ctrl ctrl;
  46         struct pvr2_i2c_client *client;
  47         struct pvr2_hdw *hdw;
  48         unsigned long stale_mask;
  49 };
  50
  51
  52 struct routing_scheme_item {
  53         int vid;
  54         int aud;
  55 };
  56
  57 struct routing_scheme {
  58         const struct routing_scheme_item *def;
  59         unsigned int cnt;
  60 };
  61
  62 static const struct routing_scheme_item routing_scheme0[] = {
  63         [PVR2_CVAL_INPUT_TV] = {
  64                 .vid = CX25840_COMPOSITE7,
  65                 .aud = CX25840_AUDIO8,
  66         },
  67         [PVR2_CVAL_INPUT_RADIO] = { /* Treat the same as composite */
  68                 .vid = CX25840_COMPOSITE3,
  69                 .aud = CX25840_AUDIO_SERIAL,
  70         },
  71         [PVR2_CVAL_INPUT_COMPOSITE] = {
  72                 .vid = CX25840_COMPOSITE3,
  73                 .aud = CX25840_AUDIO_SERIAL,
  74         },
  75         [PVR2_CVAL_INPUT_SVIDEO] = {
  76                 .vid = CX25840_SVIDEO1,
  77                 .aud = CX25840_AUDIO_SERIAL,
  78         },
  79 };
  80
  81 /* Specific to gotview device */
  82 static const struct routing_scheme_item routing_schemegv[] = {
  83         [PVR2_CVAL_INPUT_TV] = {
  84                 .vid = CX25840_COMPOSITE2,
  85                 .aud = CX25840_AUDIO5,
  86         },
  87         [PVR2_CVAL_INPUT_RADIO] = { /* Treat the same as composite */
  88                 .vid = CX25840_COMPOSITE1,
  89                 .aud = CX25840_AUDIO_SERIAL,
  90         },
  91         [PVR2_CVAL_INPUT_COMPOSITE] = {
  92                 .vid = CX25840_COMPOSITE1,
  93                 .aud = CX25840_AUDIO_SERIAL,
  94         },
  95         [PVR2_CVAL_INPUT_SVIDEO] = {
  96                 .vid = (CX25840_SVIDEO_LUMA3|CX25840_SVIDEO_CHROMA4),
  97                 .aud = CX25840_AUDIO_SERIAL,
  98         },
  99 };
 100
 101 static const struct routing_scheme routing_schemes[] = {
 102         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
 103                 .def = routing_scheme0,
 104                 .cnt = ARRAY_SIZE(routing_scheme0),
 105         },
 106         [PVR2_ROUTING_SCHEME_GOTVIEW] = {
 107                 .def = routing_schemegv,
 108                 .cnt = ARRAY_SIZE(routing_schemegv),
 109         },
 110 };
 111
 112 static void set_input(struct pvr2_v4l_cx2584x *ctxt)
 113 {
 114         struct pvr2_hdw *hdw = ctxt->hdw;
 115         struct v4l2_routing route;
 116         enum cx25840_video_input vid_input;
 117         enum cx25840_audio_input aud_input;
 118         const struct routing_scheme *sp;
 119         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
 120
 121         memset(&route,0,sizeof(route));
 122
 123         if ((sid < ARRAY_SIZE(routing_schemes)) &&
 124             ((sp = routing_schemes + sid) != 0) &&
 125             (hdw->input_val >= 0) &&
 126             (hdw->input_val < sp->cnt)) {
 127                 vid_input = sp->def[hdw->input_val].vid;
 128                 aud_input = sp->def[hdw->input_val].aud;
 129         } else {
 130                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 131                            "*** WARNING *** i2c cx2584x set_input:"
 132                            " Invalid routing scheme (%u) and/or input (%d)",
 133                            sid,hdw->input_val);
 134                 return;
 135         }
 136
 137         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_input vid=0x%x aud=0x%x",
 138                    vid_input,aud_input);
 139         route.input = (u32)vid_input;
 140         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
 141         route.input = (u32)aud_input;
 142         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
 143 }
 144
 145
 146 static int check_input(struct pvr2_v4l_cx2584x *ctxt)
 147 {
 148         struct pvr2_hdw *hdw = ctxt->hdw;
 149         return hdw->input_dirty != 0;
 150 }
 151
 152
 153 static void set_audio(struct pvr2_v4l_cx2584x *ctxt)
 154 {
 155         u32 val;
 156         struct pvr2_hdw *hdw = ctxt->hdw;
 157
 158         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_audio %d",
 159                    hdw->srate_val);
 160         switch (hdw->srate_val) {
 161         default:
 162         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 163                 val = 48000;
 164                 break;
 165         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 166                 val = 44100;
 167                 break;
 168         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 169                 val = 32000;
 170                 break;
 171         }
 172         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 173 }
 174
 175
 176 static int check_audio(struct pvr2_v4l_cx2584x *ctxt)
 177 {
 178         struct pvr2_hdw *hdw = ctxt->hdw;
 179         return hdw->srate_dirty != 0;
 180 }
 181
 182
 183 struct pvr2_v4l_cx2584x_ops {
 184         void (*update)(struct pvr2_v4l_cx2584x *);
 185         int (*check)(struct pvr2_v4l_cx2584x *);
 186 };
 187
 188
 189 static const struct pvr2_v4l_cx2584x_ops decoder_ops[] = {
 190         { .update = set_input, .check = check_input},
 191         { .update = set_audio, .check = check_audio},
 192 };
 193
 194
 195 static void decoder_detach(struct pvr2_v4l_cx2584x *ctxt)
 196 {
 197         ctxt->client->handler = NULL;
 198         pvr2_hdw_set_decoder(ctxt->hdw,NULL);
 199         kfree(ctxt);
 200 }
 201
 202
 203 static int decoder_check(struct pvr2_v4l_cx2584x *ctxt)
 204 {
 205         unsigned long msk;
 206         unsigned int idx;
 207
 208         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 209                 msk = 1 << idx;
 210                 if (ctxt->stale_mask & msk) continue;
 211                 if (decoder_ops[idx].check(ctxt)) {
 212                         ctxt->stale_mask |= msk;
 213                 }
 214         }
 215         return ctxt->stale_mask != 0;
 216 }
 217
 218
 219 static void decoder_update(struct pvr2_v4l_cx2584x *ctxt)
 220 {
 221         unsigned long msk;
 222         unsigned int idx;
 223
 224         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 225                 msk = 1 << idx;
 226                 if (!(ctxt->stale_mask & msk)) continue;
 227                 ctxt->stale_mask &= ~msk;
 228                 decoder_ops[idx].update(ctxt);
 229         }
 230 }
 231
 232
 233 static void decoder_enable(struct pvr2_v4l_cx2584x *ctxt,int fl)
 234 {
 235         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_enable(%d)",fl);
 236         pvr2_v4l2_cmd_stream(ctxt->client,fl);
 237 }
 238
 239
 240 static int decoder_detect(struct pvr2_i2c_client *cp)
 241 {
 242         int ret;
 243         /* Attempt to query the decoder - let's see if it will answer */
 244         struct v4l2_queryctrl qc;
 245
 246         memset(&qc,0,sizeof(qc));
 247
 248         qc.id = V4L2_CID_BRIGHTNESS;
 249
 250         ret = pvr2_i2c_client_cmd(cp,VIDIOC_QUERYCTRL,&qc);
 251         return ret == 0; /* Return true if it answered */
 252 }
 253
 254
 255 static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
 256                                      char *buf,unsigned int cnt)
 257 {
 258         return scnprintf(buf,cnt,"handler: pvrusb2-cx2584x-v4l");
 259 }
 260
 261
 262 static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
 263 {
 264         int ret;
 265         ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,NULL);
 266         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
 267 }
 268
 269
 270 static const struct pvr2_i2c_handler_functions hfuncs = {
 271         .detach = (void (*)(void *))decoder_detach,
 272         .check = (int (*)(void *))decoder_check,
 273         .update = (void (*)(void *))decoder_update,
 274         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 275 };
 276
 277
 278 int pvr2_i2c_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
 279                                struct pvr2_i2c_client *cp)
 280 {
 281         struct pvr2_v4l_cx2584x *ctxt;
 282
 283         if (hdw->decoder_ctrl) return 0;
 284         if (cp->handler) return 0;
 285         if (!decoder_detect(cp)) return 0;
 286
 287         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 288         if (!ctxt) return 0;
 289
 290         ctxt->handler.func_data = ctxt;
 291         ctxt->handler.func_table = &hfuncs;
 292         ctxt->ctrl.ctxt = ctxt;
 293         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 294         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 295         ctxt->ctrl.force_reset = (void (*)(void*))decoder_reset;
 296         ctxt->client = cp;
 297         ctxt->hdw = hdw;
 298         ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
 299         pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
 300         cp->handler = &ctxt->handler;
 301         {
 302                 /*
 303                   Mike Isely <isely@pobox.com> 19-Nov-2006 - This bit
 304                   of nuttiness for cx25840 causes that module to
 305                   correctly set up its video scaling.  This is really
 306                   a problem in the cx25840 module itself, but we work
 307                   around it here.  The problem has not been seen in
 308                   ivtv because there VBI is supported and set up.  We
 309                   don't do VBI here (at least not yet) and thus we
 310                   never attempted to even set it up.
 311                  */
 312                 struct v4l2_format fmt;
 313                 memset(&fmt,0,sizeof(fmt));
 314                 fmt.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
 315                 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_FMT,&fmt);
 316         }
 317         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x cx2584x V4L2 handler set up",
 318                    cp->client->addr);
 319         return !0;
 320 }
 321
 322
 323
 324
 325 /*
 326   Stuff for Emacs to see, in order to encourage consistent editing style:
 327   *** Local Variables: ***
 328   *** mode: c ***
 329   *** fill-column: 70 ***
 330   *** tab-width: 8 ***
 331   *** c-basic-offset: 8 ***
 332   *** End: ***
 333   */