sound/drivers/dummy.c

   1 /*
   2  *  Dummy soundcard
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program; if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  18  *
  19  */
  20
  21 #include <sound/driver.h>
  22 #include <linux/init.h>
  23 #include <linux/jiffies.h>
  24 #include <linux/slab.h>
  25 #include <linux/time.h>
  26 #include <linux/wait.h>
  27 #include <sound/core.h>
  28 #include <sound/control.h>
  29 #include <sound/pcm.h>
  30 #include <sound/rawmidi.h>
  31 #define SNDRV_GET_ID
  32 #include <sound/initval.h>
  33
  34 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  35 MODULE_DESCRIPTION("Dummy soundcard (/dev/null)");
  36 MODULE_LICENSE("GPL");
  37 MODULE_CLASSES("{sound}");
  38 MODULE_DEVICES("{{ALSA,Dummy soundcard}}");
  39
  40 #define MAX_PCM_DEVICES         4
  41 #define MAX_PCM_SUBSTREAMS      16
  42 #define MAX_MIDI_DEVICES        2
  43
  44 #if 0 /* emu10k1 emulation */
  45 #define MAX_BUFFER_SIZE         (128 * 1024)
  46 static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime)
  47 {
  48         int err;
  49         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
  50                 return err;
  51         if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0)
  52                 return err;
  53         return 0;
  54 }
  55 #define add_playback_constraints emu10k1_playback_constraints
  56 #endif
  57
  58 #if 0 /* RME9652 emulation */
  59 #define MAX_BUFFER_SIZE         (26 * 64 * 1024)
  60 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S32_LE
  61 #define USE_CHANNELS_MIN        26
  62 #define USE_CHANNELS_MAX        26
  63 #define USE_PERIODS_MIN         2
  64 #define USE_PERIODS_MAX         2
  65 #endif
  66
  67 #if 0 /* ICE1712 emulation */
  68 #define MAX_BUFFER_SIZE         (256 * 1024)
  69 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S32_LE
  70 #define USE_CHANNELS_MIN        10
  71 #define USE_CHANNELS_MAX        10
  72 #define USE_PERIODS_MIN         1
  73 #define USE_PERIODS_MAX         1024
  74 #endif
  75
  76 #if 0 /* UDA1341 emulation */
  77 #define MAX_BUFFER_SIZE         (16380)
  78 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S16_LE
  79 #define USE_CHANNELS_MIN        2
  80 #define USE_CHANNELS_MAX        2
  81 #define USE_PERIODS_MIN         2
  82 #define USE_PERIODS_MAX         255
  83 #endif
  84
  85 #if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */
  86 #define USE_FORMATS             SNDRV_PCM_FMTBIT_S16_LE
  87 #define USE_CHANNELS_MIN        2
  88 #define USE_CHANNELS_MAX        2
  89 #define USE_RATE                SNDRV_PCM_RATE_48000
  90 #define USE_RATE_MIN            48000
  91 #define USE_RATE_MAX            48000
  92 #endif
  93
  94
  95 /* defaults */
  96 #ifndef MAX_BUFFER_SIZE
  97 #define MAX_BUFFER_SIZE         (64*1024)
  98 #endif
  99 #ifndef USE_FORMATS
 100 #define USE_FORMATS             (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 101 #endif
 102 #ifndef USE_RATE
 103 #define USE_RATE                SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000
 104 #define USE_RATE_MIN            5500
 105 #define USE_RATE_MAX            48000
 106 #endif
 107 #ifndef USE_CHANNELS_MIN
 108 #define USE_CHANNELS_MIN        1
 109 #endif
 110 #ifndef USE_CHANNELS_MAX
 111 #define USE_CHANNELS_MAX        2
 112 #endif
 113 #ifndef USE_PERIODS_MIN
 114 #define USE_PERIODS_MIN         1
 115 #endif
 116 #ifndef USE_PERIODS_MAX
 117 #define USE_PERIODS_MAX         1024
 118 #endif
 119 #ifndef add_playback_constraints
 120 #define add_playback_constraints(x) 0
 121 #endif
 122 #ifndef add_capture_constraints
 123 #define add_capture_constraints(x) 0
 124 #endif
 125
 126 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 127 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 128 static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
 129 static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
 130 static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8};
 131 //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
 132
 133 MODULE_PARM(index, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
 134 MODULE_PARM_DESC(index, "Index value for dummy soundcard.");
 135 MODULE_PARM_SYNTAX(index, SNDRV_INDEX_DESC);
 136 MODULE_PARM(id, "1-" __MODULE_STRING(SNDRV_CARDS) "s");
 137 MODULE_PARM_DESC(id, "ID string for dummy soundcard.");
 138 MODULE_PARM_SYNTAX(id, SNDRV_ID_DESC);
 139 MODULE_PARM(enable, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
 140 MODULE_PARM_DESC(enable, "Enable this dummy soundcard.");
 141 MODULE_PARM_SYNTAX(enable, SNDRV_ENABLE_DESC);
 142 MODULE_PARM(pcm_devs, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
 143 MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver.");
 144 MODULE_PARM_SYNTAX(pcm_devs, SNDRV_ENABLED ",allows:{{0,4}},default:1,dialog:list");
 145 MODULE_PARM(pcm_substreams, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
 146 MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver.");
 147 MODULE_PARM_SYNTAX(pcm_substreams, SNDRV_ENABLED ",allows:{{1,16}},default:8,dialog:list");
 148 //MODULE_PARM(midi_devs, "1-" __MODULE_STRING(SNDRV_CARDS) "i");
 149 //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver.");
 150 //MODULE_PARM_SYNTAX(midi_devs, SNDRV_ENABLED ",allows:{{0,2}},default:8,dialog:list");
 151
 152 #define MIXER_ADDR_MASTER       0
 153 #define MIXER_ADDR_LINE         1
 154 #define MIXER_ADDR_MIC          2
 155 #define MIXER_ADDR_SYNTH        3
 156 #define MIXER_ADDR_CD           4
 157 #define MIXER_ADDR_LAST         4
 158
 159 typedef struct snd_card_dummy {
 160         snd_card_t *card;
 161         spinlock_t mixer_lock;
 162         int mixer_volume[MIXER_ADDR_LAST+1][2];
 163         int capture_source[MIXER_ADDR_LAST+1][2];
 164 } snd_card_dummy_t;
 165
 166 typedef struct snd_card_dummy_pcm {
 167         snd_card_dummy_t *dummy;
 168         spinlock_t lock;
 169         struct timer_list timer;
 170         unsigned int pcm_size;
 171         unsigned int pcm_count;
 172         unsigned int pcm_bps;           /* bytes per second */
 173         unsigned int pcm_jiffie;        /* bytes per one jiffie */
 174         unsigned int pcm_irq_pos;       /* IRQ position */
 175         unsigned int pcm_buf_pos;       /* position in buffer */
 176         snd_pcm_substream_t *substream;
 177 } snd_card_dummy_pcm_t;
 178
 179 static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
 180
 181
 182 static int snd_card_dummy_playback_ioctl(snd_pcm_substream_t * substream,
 183                                          unsigned int cmd,
 184                                          void *arg)
 185 {
 186         return snd_pcm_lib_ioctl(substream, cmd, arg);
 187 }
 188
 189 static int snd_card_dummy_capture_ioctl(snd_pcm_substream_t * substream,
 190                                         unsigned int cmd,
 191                                         void *arg)
 192 {
 193         return snd_pcm_lib_ioctl(substream, cmd, arg);
 194 }
 195
 196 static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream)
 197 {
 198         snd_pcm_runtime_t *runtime = substream->runtime;
 199         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return);
 200
 201         dpcm->timer.expires = 1 + jiffies;
 202         add_timer(&dpcm->timer);
 203 }
 204
 205 static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream)
 206 {
 207         snd_pcm_runtime_t *runtime = substream->runtime;
 208         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return);
 209
 210         del_timer(&dpcm->timer);
 211 }
 212
 213 static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream,
 214                                            int cmd)
 215 {
 216         if (cmd == SNDRV_PCM_TRIGGER_START) {
 217                 snd_card_dummy_pcm_timer_start(substream);
 218         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 219                 snd_card_dummy_pcm_timer_stop(substream);
 220         } else {
 221                 return -EINVAL;
 222         }
 223         return 0;
 224 }
 225
 226 static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream,
 227                                           int cmd)
 228 {
 229         if (cmd == SNDRV_PCM_TRIGGER_START) {
 230                 snd_card_dummy_pcm_timer_start(substream);
 231         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 232                 snd_card_dummy_pcm_timer_stop(substream);
 233         } else {
 234                 return -EINVAL;
 235         }
 236         return 0;
 237 }
 238
 239 static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream)
 240 {
 241         snd_pcm_runtime_t *runtime = substream->runtime;
 242         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO);
 243         unsigned int bps;
 244
 245         bps = runtime->rate * runtime->channels;
 246         bps *= snd_pcm_format_width(runtime->format);
 247         bps /= 8;
 248         if (bps <= 0)
 249                 return -EINVAL;
 250         dpcm->pcm_bps = bps;
 251         dpcm->pcm_jiffie = bps / HZ;
 252         dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream);
 253         dpcm->pcm_count = snd_pcm_lib_period_bytes(substream);
 254         dpcm->pcm_irq_pos = 0;
 255         dpcm->pcm_buf_pos = 0;
 256         return 0;
 257 }
 258
 259 static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream)
 260 {
 261         return snd_card_dummy_pcm_prepare(substream);
 262 }
 263
 264 static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream)
 265 {
 266         return snd_card_dummy_pcm_prepare(substream);
 267 }
 268
 269 static void snd_card_dummy_pcm_timer_function(unsigned long data)
 270 {
 271         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, (void *)data, return);
 272
 273         dpcm->timer.expires = 1 + jiffies;
 274         add_timer(&dpcm->timer);
 275         spin_lock_irq(&dpcm->lock);
 276         dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
 277         dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
 278         dpcm->pcm_buf_pos %= dpcm->pcm_size;
 279         if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
 280                 dpcm->pcm_irq_pos %= dpcm->pcm_count;
 281                 snd_pcm_period_elapsed(dpcm->substream);
 282         }
 283         spin_unlock_irq(&dpcm->lock);
 284 }
 285
 286 static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream)
 287 {
 288         snd_pcm_runtime_t *runtime = substream->runtime;
 289         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO);
 290
 291         return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
 292 }
 293
 294 static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream)
 295 {
 296         snd_pcm_runtime_t *runtime = substream->runtime;
 297         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return -ENXIO);
 298
 299         return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
 300 }
 301
 302 static snd_pcm_hardware_t snd_card_dummy_playback =
 303 {
 304         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 305                                  SNDRV_PCM_INFO_MMAP_VALID),
 306         .formats =              USE_FORMATS,
 307         .rates =                USE_RATE,
 308         .rate_min =             USE_RATE_MIN,
 309         .rate_max =             USE_RATE_MAX,
 310         .channels_min =         USE_CHANNELS_MIN,
 311         .channels_max =         USE_CHANNELS_MAX,
 312         .buffer_bytes_max =     MAX_BUFFER_SIZE,
 313         .period_bytes_min =     64,
 314         .period_bytes_max =     MAX_BUFFER_SIZE,
 315         .periods_min =          USE_PERIODS_MIN,
 316         .periods_max =          USE_PERIODS_MAX,
 317         .fifo_size =            0,
 318 };
 319
 320 static snd_pcm_hardware_t snd_card_dummy_capture =
 321 {
 322         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 323                                  SNDRV_PCM_INFO_MMAP_VALID),
 324         .formats =              USE_FORMATS,
 325         .rates =                USE_RATE,
 326         .rate_min =             USE_RATE_MIN,
 327         .rate_max =             USE_RATE_MAX,
 328         .channels_min =         USE_CHANNELS_MIN,
 329         .channels_max =         USE_CHANNELS_MAX,
 330         .buffer_bytes_max =     MAX_BUFFER_SIZE,
 331         .period_bytes_min =     64,
 332         .period_bytes_max =     MAX_BUFFER_SIZE,
 333         .periods_min =          USE_PERIODS_MIN,
 334         .periods_max =          USE_PERIODS_MAX,
 335         .fifo_size =            0,
 336 };
 337
 338 static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime)
 339 {
 340         snd_card_dummy_pcm_t *dpcm = snd_magic_cast(snd_card_dummy_pcm_t, runtime->private_data, return);
 341         snd_magic_kfree(dpcm);
 342 }
 343
 344 static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream)
 345 {
 346         snd_pcm_runtime_t *runtime = substream->runtime;
 347         snd_card_dummy_pcm_t *dpcm;
 348         int err;
 349
 350         dpcm = snd_magic_kcalloc(snd_card_dummy_pcm_t, 0, GFP_KERNEL);
 351         if (dpcm == NULL)
 352                 return -ENOMEM;
 353         if ((runtime->dma_area = snd_malloc_pages_fallback(MAX_BUFFER_SIZE, GFP_KERNEL, &runtime->dma_bytes)) == NULL) {
 354                 snd_magic_kfree(dpcm);
 355                 return -ENOMEM;
 356         }
 357         init_timer(&dpcm->timer);
 358         dpcm->timer.data = (unsigned long) dpcm;
 359         dpcm->timer.function = snd_card_dummy_pcm_timer_function;
 360         spin_lock_init(&dpcm->lock);
 361         dpcm->substream = substream;
 362         runtime->private_data = dpcm;
 363         runtime->private_free = snd_card_dummy_runtime_free;
 364         runtime->hw = snd_card_dummy_playback;
 365         if (substream->pcm->device & 1) {
 366                 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
 367                 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
 368         }
 369         if (substream->pcm->device & 2)
 370                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
 371         if ((err = add_playback_constraints(runtime)) < 0) {
 372                 snd_magic_kfree(dpcm);
 373                 return err;
 374         }
 375
 376         return 0;
 377 }
 378
 379 static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream)
 380 {
 381         snd_pcm_runtime_t *runtime = substream->runtime;
 382         snd_card_dummy_pcm_t *dpcm;
 383         int err;
 384
 385         dpcm = snd_magic_kcalloc(snd_card_dummy_pcm_t, 0, GFP_KERNEL);
 386         if (dpcm == NULL)
 387                 return -ENOMEM;
 388         if ((runtime->dma_area = snd_malloc_pages_fallback(MAX_BUFFER_SIZE, GFP_KERNEL, &runtime->dma_bytes)) == NULL) {
 389                 snd_magic_kfree(dpcm);
 390                 return -ENOMEM;
 391         }
 392         memset(runtime->dma_area, 0, runtime->dma_bytes);
 393         init_timer(&dpcm->timer);
 394         dpcm->timer.data = (unsigned long) dpcm;
 395         dpcm->timer.function = snd_card_dummy_pcm_timer_function;
 396         spin_lock_init(&dpcm->lock);
 397         dpcm->substream = substream;
 398         runtime->private_data = dpcm;
 399         runtime->private_free = snd_card_dummy_runtime_free;
 400         runtime->hw = snd_card_dummy_capture;
 401         if (substream->pcm->device == 1) {
 402                 runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED;
 403                 runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED;
 404         }
 405         if (substream->pcm->device & 2)
 406                 runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID);
 407         if ((err = add_capture_constraints(runtime)) < 0) {
 408                 snd_magic_kfree(dpcm);
 409                 return err;
 410         }
 411
 412         return 0;
 413 }
 414
 415 static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream)
 416 {
 417         snd_pcm_runtime_t *runtime = substream->runtime;
 418
 419         snd_free_pages(runtime->dma_area, runtime->dma_bytes);
 420         return 0;
 421 }
 422
 423 static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream)
 424 {
 425         snd_pcm_runtime_t *runtime = substream->runtime;
 426
 427         snd_free_pages(runtime->dma_area, runtime->dma_bytes);
 428         return 0;
 429 }
 430
 431 static snd_pcm_ops_t snd_card_dummy_playback_ops = {
 432         .open =                 snd_card_dummy_playback_open,
 433         .close =                snd_card_dummy_playback_close,
 434         .ioctl =                snd_card_dummy_playback_ioctl,
 435         .prepare =              snd_card_dummy_playback_prepare,
 436         .trigger =              snd_card_dummy_playback_trigger,
 437         .pointer =              snd_card_dummy_playback_pointer,
 438 };
 439
 440 static snd_pcm_ops_t snd_card_dummy_capture_ops = {
 441         .open =                 snd_card_dummy_capture_open,
 442         .close =                snd_card_dummy_capture_close,
 443         .ioctl =                snd_card_dummy_capture_ioctl,
 444         .prepare =              snd_card_dummy_capture_prepare,
 445         .trigger =              snd_card_dummy_capture_trigger,
 446         .pointer =              snd_card_dummy_capture_pointer,
 447 };
 448
 449 static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams)
 450 {
 451         snd_pcm_t *pcm;
 452         int err;
 453
 454         if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0)
 455                 return err;
 456         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops);
 457         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops);
 458         pcm->private_data = dummy;
 459         pcm->info_flags = 0;
 460         strcpy(pcm->name, "Dummy PCM");
 461         return 0;
 462 }
 463
 464 #define DUMMY_VOLUME(xname, xindex, addr) \
 465 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 466   .info = snd_dummy_volume_info, \
 467   .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \
 468   .private_value = addr }
 469
 470 static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 471 {
 472         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 473         uinfo->count = 2;
 474         uinfo->value.integer.min = -50;
 475         uinfo->value.integer.max = 100;
 476         return 0;
 477 }
 478
 479 static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 480 {
 481         snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol);
 482         unsigned long flags;
 483         int addr = kcontrol->private_value;
 484
 485         spin_lock_irqsave(&dummy->mixer_lock, flags);
 486         ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
 487         ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
 488         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
 489         return 0;
 490 }
 491
 492 static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 493 {
 494         snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol);
 495         unsigned long flags;
 496         int change, addr = kcontrol->private_value;
 497         int left, right;
 498
 499         left = ucontrol->value.integer.value[0];
 500         if (left < -50)
 501                 left = -50;
 502         if (left > 100)
 503                 left = 100;
 504         right = ucontrol->value.integer.value[1];
 505         if (right < -50)
 506                 right = -50;
 507         if (right > 100)
 508                 right = 100;
 509         spin_lock_irqsave(&dummy->mixer_lock, flags);
 510         change = dummy->mixer_volume[addr][0] != left ||
 511                  dummy->mixer_volume[addr][1] != right;
 512         dummy->mixer_volume[addr][0] = left;
 513         dummy->mixer_volume[addr][1] = right;
 514         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
 515         return change;
 516 }
 517
 518 #define DUMMY_CAPSRC(xname, xindex, addr) \
 519 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
 520   .info = snd_dummy_capsrc_info, \
 521   .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \
 522   .private_value = addr }
 523
 524 static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
 525 {
 526         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 527         uinfo->count = 2;
 528         uinfo->value.integer.min = 0;
 529         uinfo->value.integer.max = 1;
 530         return 0;
 531 }
 532
 533 static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 534 {
 535         snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol);
 536         unsigned long flags;
 537         int addr = kcontrol->private_value;
 538
 539         spin_lock_irqsave(&dummy->mixer_lock, flags);
 540         ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
 541         ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
 542         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
 543         return 0;
 544 }
 545
 546 static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
 547 {
 548         snd_card_dummy_t *dummy = _snd_kcontrol_chip(kcontrol);
 549         unsigned long flags;
 550         int change, addr = kcontrol->private_value;
 551         int left, right;
 552
 553         left = ucontrol->value.integer.value[0] & 1;
 554         right = ucontrol->value.integer.value[1] & 1;
 555         spin_lock_irqsave(&dummy->mixer_lock, flags);
 556         change = dummy->capture_source[addr][0] != left &&
 557                  dummy->capture_source[addr][1] != right;
 558         dummy->capture_source[addr][0] = left;
 559         dummy->capture_source[addr][1] = right;
 560         spin_unlock_irqrestore(&dummy->mixer_lock, flags);
 561         return change;
 562 }
 563
 564 #define DUMMY_CONTROLS (sizeof(snd_dummy_controls)/sizeof(snd_kcontrol_new_t))
 565
 566 static snd_kcontrol_new_t snd_dummy_controls[] = {
 567 DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER),
 568 DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER),
 569 DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH),
 570 DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER),
 571 DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE),
 572 DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER),
 573 DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC),
 574 DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER),
 575 DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD),
 576 DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER)
 577 };
 578
 579 int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy)
 580 {
 581         snd_card_t *card = dummy->card;
 582         unsigned int idx;
 583         int err;
 584
 585         snd_assert(dummy != NULL, return -EINVAL);
 586         spin_lock_init(&dummy->mixer_lock);
 587         strcpy(card->mixername, "Dummy Mixer");
 588
 589         for (idx = 0; idx < DUMMY_CONTROLS; idx++) {
 590                 if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0)
 591                         return err;
 592         }
 593         return 0;
 594 }
 595
 596 static int __init snd_card_dummy_probe(int dev)
 597 {
 598         snd_card_t *card;
 599         struct snd_card_dummy *dummy;
 600         int idx, err;
 601
 602         if (!enable[dev])
 603                 return -ENODEV;
 604         card = snd_card_new(index[dev], id[dev], THIS_MODULE,
 605                             sizeof(struct snd_card_dummy));
 606         if (card == NULL)
 607                 return -ENOMEM;
 608         dummy = (struct snd_card_dummy *)card->private_data;
 609         dummy->card = card;
 610         for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) {
 611                 if (pcm_substreams[dev] < 1)
 612                         pcm_substreams[dev] = 1;
 613                 if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS)
 614                         pcm_substreams[dev] = MAX_PCM_SUBSTREAMS;
 615                 if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0)
 616                         goto __nodev;
 617         }
 618         if ((err = snd_card_dummy_new_mixer(dummy)) < 0)
 619                 goto __nodev;
 620         strcpy(card->driver, "Dummy");
 621         strcpy(card->shortname, "Dummy");
 622         sprintf(card->longname, "Dummy %i", dev + 1);
 623         if ((err = snd_card_register(card)) == 0) {
 624                 snd_dummy_cards[dev] = card;
 625                 return 0;
 626         }
 627       __nodev:
 628         snd_card_free(card);
 629         return err;
 630 }
 631
 632 static int __init alsa_card_dummy_init(void)
 633 {
 634         int dev, cards;
 635
 636         for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) {
 637                 if (snd_card_dummy_probe(dev) < 0) {
 638 #ifdef MODULE
 639                         printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1);
 640 #endif
 641                         break;
 642                 }
 643                 cards++;
 644         }
 645         if (!cards) {
 646 #ifdef MODULE
 647                 printk(KERN_ERR "Dummy soundcard not found or device busy\n");
 648 #endif
 649                 return -ENODEV;
 650         }
 651         return 0;
 652 }
 653
 654 static void __exit alsa_card_dummy_exit(void)
 655 {
 656         int idx;
 657
 658         for (idx = 0; idx < SNDRV_CARDS; idx++)
 659                 snd_card_free(snd_dummy_cards[idx]);
 660 }
 661
 662 module_init(alsa_card_dummy_init)
 663 module_exit(alsa_card_dummy_exit)
 664
 665 #ifndef MODULE
 666
 667 /* format is: snd-dummy=enable,index,id,
 668                         pcm_devs,pcm_substreams */
 669
 670 static int __init alsa_card_dummy_setup(char *str)
 671 {
 672         static unsigned __initdata nr_dev = 0;
 673
 674         if (nr_dev >= SNDRV_CARDS)
 675                 return 0;
 676         (void)(get_option(&str,&enable[nr_dev]) == 2 &&
 677                get_option(&str,&index[nr_dev]) == 2 &&
 678                get_id(&str,&id[nr_dev]) == 2 &&
 679                get_option(&str,&pcm_devs[nr_dev]) == 2 &&
 680                get_option(&str,&pcm_substreams[nr_dev]) == 2);
 681         nr_dev++;
 682         return 1;
 683 }
 684
 685 __setup("snd-dummy=", alsa_card_dummy_setup);
 686
 687 #endif /* ifndef MODULE */