SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 static void set_input(struct pvr2_v4l_cx2584x *ctxt)
  53 {
  54         struct pvr2_hdw *hdw = ctxt->hdw;
  55         struct v4l2_routing route;
  56         enum cx25840_video_input vid_input;
  57         enum cx25840_audio_input aud_input;
  58
  59         memset(&route,0,sizeof(route));
  60
  61         switch(hdw->input_val) {
  62         case PVR2_CVAL_INPUT_TV:
  63                 vid_input = CX25840_COMPOSITE7;
  64                 aud_input = CX25840_AUDIO8;
  65                 break;
  66         case PVR2_CVAL_INPUT_RADIO: // Treat same as composite
  67         case PVR2_CVAL_INPUT_COMPOSITE:
  68                 vid_input = CX25840_COMPOSITE3;
  69                 aud_input = CX25840_AUDIO_SERIAL;
  70                 break;
  71         case PVR2_CVAL_INPUT_SVIDEO:
  72                 vid_input = CX25840_SVIDEO1;
  73                 aud_input = CX25840_AUDIO_SERIAL;
  74                 break;
  75         default:
  76                 // Just set it to be composite input for now...
  77                 vid_input = CX25840_COMPOSITE3;
  78                 aud_input = CX25840_AUDIO_SERIAL;
  79                 break;
  80         }
  81
  82         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_input vid=0x%x aud=0x%x",
  83                    vid_input,aud_input);
  84         route.input = (u32)vid_input;
  85         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_VIDEO_ROUTING,&route);
  86         route.input = (u32)aud_input;
  87         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
  88 }
  89
  90
  91 static int check_input(struct pvr2_v4l_cx2584x *ctxt)
  92 {
  93         struct pvr2_hdw *hdw = ctxt->hdw;
  94         return hdw->input_dirty != 0;
  95 }
  96
  97
  98 static void set_audio(struct pvr2_v4l_cx2584x *ctxt)
  99 {
 100         u32 val;
 101         struct pvr2_hdw *hdw = ctxt->hdw;
 102
 103         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx2584x set_audio %d",
 104                    hdw->srate_val);
 105         switch (hdw->srate_val) {
 106         default:
 107         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000:
 108                 val = 48000;
 109                 break;
 110         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100:
 111                 val = 44100;
 112                 break;
 113         case V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000:
 114                 val = 32000;
 115                 break;
 116         }
 117         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_AUDIO_CLOCK_FREQ,&val);
 118 }
 119
 120
 121 static int check_audio(struct pvr2_v4l_cx2584x *ctxt)
 122 {
 123         struct pvr2_hdw *hdw = ctxt->hdw;
 124         return hdw->srate_dirty != 0;
 125 }
 126
 127
 128 struct pvr2_v4l_cx2584x_ops {
 129         void (*update)(struct pvr2_v4l_cx2584x *);
 130         int (*check)(struct pvr2_v4l_cx2584x *);
 131 };
 132
 133
 134 static const struct pvr2_v4l_cx2584x_ops decoder_ops[] = {
 135         { .update = set_input, .check = check_input},
 136         { .update = set_audio, .check = check_audio},
 137 };
 138
 139
 140 static void decoder_detach(struct pvr2_v4l_cx2584x *ctxt)
 141 {
 142         ctxt->client->handler = NULL;
 143         ctxt->hdw->decoder_ctrl = NULL;
 144         kfree(ctxt);
 145 }
 146
 147
 148 static int decoder_check(struct pvr2_v4l_cx2584x *ctxt)
 149 {
 150         unsigned long msk;
 151         unsigned int idx;
 152
 153         for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
 154              idx++) {
 155                 msk = 1 << idx;
 156                 if (ctxt->stale_mask & msk) continue;
 157                 if (decoder_ops[idx].check(ctxt)) {
 158                         ctxt->stale_mask |= msk;
 159                 }
 160         }
 161         return ctxt->stale_mask != 0;
 162 }
 163
 164
 165 static void decoder_update(struct pvr2_v4l_cx2584x *ctxt)
 166 {
 167         unsigned long msk;
 168         unsigned int idx;
 169
 170         for (idx = 0; idx < sizeof(decoder_ops)/sizeof(decoder_ops[0]);
 171              idx++) {
 172                 msk = 1 << idx;
 173                 if (!(ctxt->stale_mask & msk)) continue;
 174                 ctxt->stale_mask &= ~msk;
 175                 decoder_ops[idx].update(ctxt);
 176         }
 177 }
 178
 179
 180 static void decoder_enable(struct pvr2_v4l_cx2584x *ctxt,int fl)
 181 {
 182         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_enable(%d)",fl);
 183         pvr2_v4l2_cmd_stream(ctxt->client,fl);
 184 }
 185
 186
 187 static int decoder_detect(struct pvr2_i2c_client *cp)
 188 {
 189         int ret;
 190         /* Attempt to query the decoder - let's see if it will answer */
 191         struct v4l2_queryctrl qc;
 192
 193         memset(&qc,0,sizeof(qc));
 194
 195         qc.id = V4L2_CID_BRIGHTNESS;
 196
 197         ret = pvr2_i2c_client_cmd(cp,VIDIOC_QUERYCTRL,&qc);
 198         return ret == 0; /* Return true if it answered */
 199 }
 200
 201
 202 static unsigned int decoder_describe(struct pvr2_v4l_cx2584x *ctxt,
 203                                      char *buf,unsigned int cnt)
 204 {
 205         return scnprintf(buf,cnt,"handler: pvrusb2-cx2584x-v4l");
 206 }
 207
 208
 209 static void decoder_reset(struct pvr2_v4l_cx2584x *ctxt)
 210 {
 211         int ret;
 212         ret = pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_RESET,NULL);
 213         pvr2_trace(PVR2_TRACE_CHIPS,"i2c cx25840 decoder_reset (ret=%d)",ret);
 214 }
 215
 216
 217 static const struct pvr2_i2c_handler_functions hfuncs = {
 218         .detach = (void (*)(void *))decoder_detach,
 219         .check = (int (*)(void *))decoder_check,
 220         .update = (void (*)(void *))decoder_update,
 221         .describe = (unsigned int (*)(void *,char *,unsigned int))decoder_describe,
 222 };
 223
 224
 225 int pvr2_i2c_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
 226                                struct pvr2_i2c_client *cp)
 227 {
 228         struct pvr2_v4l_cx2584x *ctxt;
 229
 230         if (hdw->decoder_ctrl) return 0;
 231         if (cp->handler) return 0;
 232         if (!decoder_detect(cp)) return 0;
 233
 234         ctxt = kmalloc(sizeof(*ctxt),GFP_KERNEL);
 235         if (!ctxt) return 0;
 236         memset(ctxt,0,sizeof(*ctxt));
 237
 238         ctxt->handler.func_data = ctxt;
 239         ctxt->handler.func_table = &hfuncs;
 240         ctxt->ctrl.ctxt = ctxt;
 241         ctxt->ctrl.detach = (void (*)(void *))decoder_detach;
 242         ctxt->ctrl.enable = (void (*)(void *,int))decoder_enable;
 243         ctxt->ctrl.force_reset = (void (*)(void*))decoder_reset;
 244         ctxt->client = cp;
 245         ctxt->hdw = hdw;
 246         ctxt->stale_mask = (1 << (sizeof(decoder_ops)/
 247                                   sizeof(decoder_ops[0]))) - 1;
 248         hdw->decoder_ctrl = &ctxt->ctrl;
 249         cp->handler = &ctxt->handler;
 250         {
 251                 /*
 252                   Mike Isely <isely@pobox.com> 19-Nov-2006 - This bit
 253                   of nuttiness for cx25840 causes that module to
 254                   correctly set up its video scaling.  This is really
 255                   a problem in the cx25840 module itself, but we work
 256                   around it here.  The problem has not been seen in
 257                   ivtv because there VBI is supported and set up.  We
 258                   don't do VBI here (at least not yet) and thus we
 259                   never attempted to even set it up.
 260                  */
 261                 struct v4l2_format fmt;
 262                 memset(&fmt,0,sizeof(fmt));
 263                 fmt.type = V4L2_BUF_TYPE_SLICED_VBI_CAPTURE;
 264                 pvr2_i2c_client_cmd(ctxt->client,VIDIOC_S_FMT,&fmt);
 265         }
 266         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x cx2584x V4L2 handler set up",
 267                    cp->client->addr);
 268         return !0;
 269 }
 270
 271
 272
 273
 274 /*
 275   Stuff for Emacs to see, in order to encourage consistent editing style:
 276   *** Local Variables: ***
 277   *** mode: c ***
 278   *** fill-column: 70 ***
 279   *** tab-width: 8 ***
 280   *** c-basic-offset: 8 ***
 281   *** End: ***
 282   */