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