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