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] = {
  88                 /* line-in is used for radio and composite.  A GPIO is
  89                    used to switch between the two choices. */
  90                 .vid = CX25840_COMPOSITE1,
  91                 .aud = CX25840_AUDIO_SERIAL,
  92         },
  93         [PVR2_CVAL_INPUT_COMPOSITE] = {
  94                 .vid = CX25840_COMPOSITE1,
  95                 .aud = CX25840_AUDIO_SERIAL,
  96         },
  97         [PVR2_CVAL_INPUT_SVIDEO] = {
  98                 .vid = (CX25840_SVIDEO_LUMA3|CX25840_SVIDEO_CHROMA4),
  99                 .aud = CX25840_AUDIO_SERIAL,
 100         },
 101 };
 102
 103 static const struct routing_scheme routing_schemes[] = {
 104         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
 105                 .def = routing_scheme0,
 106                 .cnt = ARRAY_SIZE(routing_scheme0),
 107         },
 108         [PVR2_ROUTING_SCHEME_GOTVIEW] = {
 109                 .def = routing_schemegv,
 110                 .cnt = ARRAY_SIZE(routing_schemegv),
 111         },
 112 };
 113
 114 static void set_input(struct pvr2_v4l_cx2584x *ctxt)
 115 {
 116         struct pvr2_hdw *hdw = ctxt->hdw;
 117         struct v4l2_routing route;
 118         enum cx25840_video_input vid_input;
 119         enum cx25840_audio_input aud_input;
 120         const struct routing_scheme *sp;
 121         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
 122
 123         memset(&route,0,sizeof(route));
 124
 125         if ((sid < ARRAY_SIZE(routing_schemes)) &&
 126             ((sp = routing_schemes + sid) != 0) &&
 127             (hdw->input_val >= 0) &&
 128             (hdw->input_val < sp->cnt)) {
 129                 vid_input = sp->def[hdw->input_val].vid;
 130                 aud_input = sp->def[hdw->input_val].aud;
 131         } else {
 132                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 133                            "*** WARNING *** i2c cx2584x set_input:"
 134                            " Invalid routing scheme (%u) and/or input (%d)",
 135                            sid,hdw->input_val);
 136                 return;
 137         }
 138
 139         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_input vid=0x%x aud=0x%x",
 140                    vid_input,aud_input);
 141         route.input = (u32)vid_input;
 142         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
 143         route.input = (u32)aud_input;
 144         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
 145 }
 146
 147
 148 static int check_input(struct pvr2_v4l_cx2584x *ctxt)
 149 {
 150         struct pvr2_hdw *hdw = ctxt->hdw;
 151         return hdw->input_dirty != 0;
 152 }
 153
 154
 155 static void set_audio(struct pvr2_v4l_cx2584x *ctxt)
 156 {
 157         u32 val;
 158         struct pvr2_hdw *hdw = ctxt->hdw;
 159
 160         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_audio %d",
 161                    hdw->srate_val);
 162         switch (hdw->srate_val) {
 163         default:
 164         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 165                 val = 48000;
 166                 break;
 167         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 168                 val = 44100;
 169                 break;
 170         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 171                 val = 32000;
 172                 break;
 173         }
 174         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 175 }
 176
 177
 178 static int check_audio(struct pvr2_v4l_cx2584x *ctxt)
 179 {
 180         struct pvr2_hdw *hdw = ctxt->hdw;
 181         return hdw->srate_dirty != 0;
 182 }
 183
 184
 185 struct pvr2_v4l_cx2584x_ops {
 186         void (*update)(struct pvr2_v4l_cx2584x *);
 187         int (*check)(struct pvr2_v4l_cx2584x *);
 188 };
 189
 190
 191 static const struct pvr2_v4l_cx2584x_ops decoder_ops[] = {
 192         { .update = set_input, .check = check_input},
 193         { .update = set_audio, .check = check_audio},
 194 };
 195
 196
 197 static void decoder_detach(struct pvr2_v4l_cx2584x *ctxt)
 198 {
 199         ctxt->client->handler = NULL;
 200         pvr2_hdw_set_decoder(ctxt->hdw,NULL);
 201         kfree(ctxt);
 202 }
 203
 204
 205 static int decoder_check(struct pvr2_v4l_cx2584x *ctxt)
 206 {
 207         unsigned long msk;
 208         unsigned int idx;
 209
 210         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 211                 msk = 1 << idx;
 212                 if (ctxt->stale_mask & msk) continue;
 213                 if (decoder_ops[idx].check(ctxt)) {
 214                         ctxt->stale_mask |= msk;
 215                 }
 216         }
 217         return ctxt->stale_mask != 0;
 218 }
 219
 220
 221 static void decoder_update(struct pvr2_v4l_cx2584x *ctxt)
 222 {
 223         unsigned long msk;
 224         unsigned int idx;
 225
 226         for (idx = 0; idx < ARRAY_SIZE(decoder_ops); idx++) {
 227                 msk = 1 << idx;
 228                 if (!(ctxt->stale_mask & msk)) continue;
 229                 ctxt->stale_mask &= ~msk;
 230                 decoder_ops[idx].update(ctxt);
 231         }
 232 }
 233
 234
 235 static void decoder_enable(struct pvr2_v4l_cx2584x *ctxt,int fl)
 236 {
 237         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_enable(%d)",fl);
 238         pvr2_v4l2_cmd_stream(ctxt->client,fl);
 239 }
 240
 241
 242 static int decoder_detect(struct pvr2_i2c_client *cp)
 243 {
 244         int ret;
 245         /* Attempt to query the decoder - let's see if it will answer */
 246         struct v4l2_queryctrl qc;
 247
 248         memset(&qc,0,sizeof(qc));
 249
 250         qc.id = V4L2_CID_BRIGHTNESS;
 251
 252         ret = pvr2_i2c_client_cmd(cp,VIDIOC_QUERYCTRL,&qc);
 253         return ret == 0; /* Return true if it answered */
 254 }
 255
 256
 257 static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
 258                                      char *buf,unsigned int cnt)
 259 {
 260         return scnprintf(buf,cnt,"handler: pvrusb2-cx2584x-v4l");
 261 }
 262
 263
 264 static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
 265 {
 266         int ret;
 267         ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,NULL);
 268         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
 269 }
 270
 271
 272 static const struct pvr2_i2c_handler_functions hfuncs = {
 273         .detach = (void (*)(void *))decoder_detach,
 274         .check = (int (*)(void *))decoder_check,
 275         .update = (void (*)(void *))decoder_update,
 276         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 277 };
 278
 279
 280 int pvr2_i2c_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
 281                                struct pvr2_i2c_client *cp)
 282 {
 283         struct pvr2_v4l_cx2584x *ctxt;
 284
 285         if (hdw->decoder_ctrl) return 0;
 286         if (cp->handler) return 0;
 287         if (!decoder_detect(cp)) return 0;
 288
 289         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 290         if (!ctxt) return 0;
 291
 292         ctxt->handler.func_data = ctxt;
 293         ctxt->handler.func_table = &hfuncs;
 294         ctxt->ctrl.ctxt = ctxt;
 295         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 296         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 297         ctxt->ctrl.force_reset = (void (*)(void*))decoder_reset;
 298         ctxt->client = cp;
 299         ctxt->hdw = hdw;
 300         ctxt->stale_mask = (1 << ARRAY_SIZE(decoder_ops)) - 1;
 301         pvr2_hdw_set_decoder(hdw,&ctxt->ctrl);
 302         cp->handler = &ctxt->handler;
 303         {
 304                 /*
 305                   Mike Isely <isely@pobox.com> 19-Nov-2006 - This bit
 306                   of nuttiness for cx25840 causes that module to
 307                   correctly set up its video scaling.  This is really
 308                   a problem in the cx25840 module itself, but we work
 309                   around it here.  The problem has not been seen in
 310                   ivtv because there VBI is supported and set up.  We
 311                   don't do VBI here (at least not yet) and thus we
 312                   never attempted to even set it up.
 313                  */
 314                 struct v4l2_format fmt;
 315                 memset(&fmt,0,sizeof(fmt));
 316                 fmt.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
 317                 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_FMT,&fmt);
 318         }
 319         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x cx2584x V4L2 handler set up",
 320                    cp->client->addr);
 321         return !0;
 322 }
 323
 324
 325
 326
 327 /*
 328   Stuff for Emacs to see, in order to encourage consistent editing style:
 329   *** Local Variables: ***
 330   *** mode: c ***
 331   *** fill-column: 70 ***
 332   *** tab-width: 8 ***
 333   *** c-basic-offset: 8 ***
 334   *** End: ***
 335   */