drivers/media/video/pvrusb2/pvrusb2-audio.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 #include "pvrusb2-audio.h"
  23 #include "pvrusb2-hdw-internal.h"
  24 #include "pvrusb2-debug.h"
  25 #include <linux/videodev2.h>
  26 #include <media/msp3400.h>
  27 #include <media/v4l2-common.h>
  28
  29
  30 struct routing_scheme {
  31         const int *def;
  32         unsigned int cnt;
  33 };
  34
  35 static const int routing_scheme0[] = {
  36         [PVR2_CVAL_INPUT_TV]        = MSP_INPUT_DEFAULT,
  37         [PVR2_CVAL_INPUT_RADIO]     = MSP_INPUT(MSP_IN_SCART2,
  38                                                 MSP_IN_TUNER1,
  39                                                 MSP_DSP_IN_SCART,
  40                                                 MSP_DSP_IN_SCART),
  41         [PVR2_CVAL_INPUT_COMPOSITE] = MSP_INPUT(MSP_IN_SCART1,
  42                                                 MSP_IN_TUNER1,
  43                                                 MSP_DSP_IN_SCART,
  44                                                 MSP_DSP_IN_SCART),
  45         [PVR2_CVAL_INPUT_SVIDEO]    = MSP_INPUT(MSP_IN_SCART1,
  46                                                 MSP_IN_TUNER1,
  47                                                 MSP_DSP_IN_SCART,
  48                                                 MSP_DSP_IN_SCART),
  49 };
  50
  51 static const struct routing_scheme routing_schemes[] = {
  52         [PVR2_ROUTING_SCHEME_HAUPPAUGE] = {
  53                 .def = routing_scheme0,
  54                 .cnt = ARRAY_SIZE(routing_scheme0),
  55         },
  56 };
  57
  58
  59 struct pvr2_msp3400_handler {
  60         struct pvr2_hdw *hdw;
  61         struct pvr2_i2c_client *client;
  62         struct pvr2_i2c_handler i2c_handler;
  63         unsigned long stale_mask;
  64 };
  65
  66
  67
  68
  69 /* This function selects the correct audio input source */
  70 static void set_stereo(struct pvr2_msp3400_handler *ctxt)
  71 {
  72         struct pvr2_hdw *hdw = ctxt->hdw;
  73         struct v4l2_routing route;
  74         const struct routing_scheme *sp;
  75         unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
  76
  77         pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
  78
  79         if ((sid < ARRAY_SIZE(routing_schemes)) &&
  80             ((sp = routing_schemes + sid) != NULL) &&
  81             (hdw->input_val >= 0) &&
  82             (hdw->input_val < sp->cnt)) {
  83                 route.input = sp->def[hdw->input_val];
  84         } else {
  85                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
  86                            "*** WARNING *** i2c msp3400 v4l2 set_stereo:"
  87                            " Invalid routing scheme (%u) and/or input (%d)",
  88                            sid,hdw->input_val);
  89                 return;
  90         }
  91         route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
  92         pvr2_i2c_client_cmd(ctxt->client,VIDIOC_INT_S_AUDIO_ROUTING,&route);
  93 }
  94
  95
  96 static int check_stereo(struct pvr2_msp3400_handler *ctxt)
  97 {
  98         struct pvr2_hdw *hdw = ctxt->hdw;
  99         return hdw->input_dirty;
 100 }
 101
 102
 103 struct pvr2_msp3400_ops {
 104         void (*update)(struct pvr2_msp3400_handler *);
 105         int (*check)(struct pvr2_msp3400_handler *);
 106 };
 107
 108
 109 static const struct pvr2_msp3400_ops msp3400_ops[] = {
 110         { .update = set_stereo, .check = check_stereo},
 111 };
 112
 113
 114 static int msp3400_check(struct pvr2_msp3400_handler *ctxt)
 115 {
 116         unsigned long msk;
 117         unsigned int idx;
 118
 119         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
 120                 msk = 1 << idx;
 121                 if (ctxt->stale_mask & msk) continue;
 122                 if (msp3400_ops[idx].check(ctxt)) {
 123                         ctxt->stale_mask |= msk;
 124                 }
 125         }
 126         return ctxt->stale_mask != 0;
 127 }
 128
 129
 130 static void msp3400_update(struct pvr2_msp3400_handler *ctxt)
 131 {
 132         unsigned long msk;
 133         unsigned int idx;
 134
 135         for (idx = 0; idx < ARRAY_SIZE(msp3400_ops); idx++) {
 136                 msk = 1 << idx;
 137                 if (!(ctxt->stale_mask & msk)) continue;
 138                 ctxt->stale_mask &= ~msk;
 139                 msp3400_ops[idx].update(ctxt);
 140         }
 141 }
 142
 143
 144 static void pvr2_msp3400_detach(struct pvr2_msp3400_handler *ctxt)
 145 {
 146         ctxt->client->handler = NULL;
 147         kfree(ctxt);
 148 }
 149
 150
 151 static unsigned int pvr2_msp3400_describe(struct pvr2_msp3400_handler *ctxt,
 152                                           char *buf,unsigned int cnt)
 153 {
 154         return scnprintf(buf,cnt,"handler: pvrusb2-audio v4l2");
 155 }
 156
 157
 158 static const struct pvr2_i2c_handler_functions msp3400_funcs = {
 159         .detach = (void (*)(void *))pvr2_msp3400_detach,
 160         .check = (int (*)(void *))msp3400_check,
 161         .update = (void (*)(void *))msp3400_update,
 162         .describe = (unsigned int (*)(void *,char *,unsigned int))pvr2_msp3400_describe,
 163 };
 164
 165
 166 int pvr2_i2c_msp3400_setup(struct pvr2_hdw *hdw,struct pvr2_i2c_client *cp)
 167 {
 168         struct pvr2_msp3400_handler *ctxt;
 169         if (cp->handler) return 0;
 170
 171         ctxt = kzalloc(sizeof(*ctxt),GFP_KERNEL);
 172         if (!ctxt) return 0;
 173
 174         ctxt->i2c_handler.func_data = ctxt;
 175         ctxt->i2c_handler.func_table = &msp3400_funcs;
 176         ctxt->client = cp;
 177         ctxt->hdw = hdw;
 178         ctxt->stale_mask = (1 << ARRAY_SIZE(msp3400_ops)) - 1;
 179         cp->handler = &ctxt->i2c_handler;
 180         pvr2_trace(PVR2_TRACE_CHIPS,"i2c 0x%x msp3400 V4L2 handler set up",
 181                    cp->client->addr);
 182         return !0;
 183 }
 184
 185 void pvr2_msp3400_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
 186 {
 187         if (hdw->input_dirty || hdw->force_dirty) {
 188                 struct v4l2_routing route;
 189                 const struct routing_scheme *sp;
 190                 unsigned int sid = hdw->hdw_desc->signal_routing_scheme;
 191
 192                 pvr2_trace(PVR2_TRACE_CHIPS, "subdev msp3400 v4l2 set_stereo");
 193
 194                 if ((sid < ARRAY_SIZE(routing_schemes)) &&
 195                     ((sp = routing_schemes + sid) != NULL) &&
 196                     (hdw->input_val >= 0) &&
 197                     (hdw->input_val < sp->cnt)) {
 198                         route.input = sp->def[hdw->input_val];
 199                 } else {
 200                         pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 201                                    "*** WARNING *** subdev msp3400 set_input:"
 202                                    " Invalid routing scheme (%u)"
 203                                    " and/or input (%d)",
 204                                    sid, hdw->input_val);
 205                         return;
 206                 }
 207                 route.output = MSP_OUTPUT(MSP_SC_IN_DSP_SCART1);
 208                 sd->ops->audio->s_routing(sd, &route);
 209         }
 210 }
 211
 212 /*
 213   Stuff for Emacs to see, in order to encourage consistent editing style:
 214   *** Local Variables: ***
 215   *** mode: c ***
 216   *** fill-column: 70 ***
 217   *** tab-width: 8 ***
 218   *** c-basic-offset: 8 ***
 219   *** End: ***
 220   */