sound/pci/aw2/aw2-alsa.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*****************************************************************************
   3  *
   4  * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
   5  * Jean-Christian Hassler <jhassler@free.fr>
   6  *
   7  * This file is part of the Audiowerk2 ALSA driver
   8  *
   9  *****************************************************************************/
  10 #include <linux/init.h>
  11 #include <linux/pci.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/slab.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/delay.h>
  16 #include <linux/io.h>
  17 #include <linux/module.h>
  18 #include <sound/core.h>
  19 #include <sound/initval.h>
  20 #include <sound/pcm.h>
  21 #include <sound/pcm_params.h>
  22 #include <sound/control.h>
  23
  24 #include "saa7146.h"
  25 #include "aw2-saa7146.h"
  26
  27 MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
  28               "Jean-Christian Hassler <jhassler@free.fr>");
  29 MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
  30 MODULE_LICENSE("GPL");
  31
  32 /*********************************
  33  * DEFINES
  34  ********************************/
  35 #define CTL_ROUTE_ANALOG 0
  36 #define CTL_ROUTE_DIGITAL 1
  37
  38 /*********************************
  39  * TYPEDEFS
  40  ********************************/
  41   /* hardware definition */
  42 static const struct snd_pcm_hardware snd_aw2_playback_hw = {
  43         .info = (SNDRV_PCM_INFO_MMAP |
  44                  SNDRV_PCM_INFO_INTERLEAVED |
  45                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
  46         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  47         .rates = SNDRV_PCM_RATE_44100,
  48         .rate_min = 44100,
  49         .rate_max = 44100,
  50         .channels_min = 2,
  51         .channels_max = 4,
  52         .buffer_bytes_max = 32768,
  53         .period_bytes_min = 4096,
  54         .period_bytes_max = 32768,
  55         .periods_min = 1,
  56         .periods_max = 1024,
  57 };
  58
  59 static const struct snd_pcm_hardware snd_aw2_capture_hw = {
  60         .info = (SNDRV_PCM_INFO_MMAP |
  61                  SNDRV_PCM_INFO_INTERLEAVED |
  62                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
  63         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  64         .rates = SNDRV_PCM_RATE_44100,
  65         .rate_min = 44100,
  66         .rate_max = 44100,
  67         .channels_min = 2,
  68         .channels_max = 2,
  69         .buffer_bytes_max = 32768,
  70         .period_bytes_min = 4096,
  71         .period_bytes_max = 32768,
  72         .periods_min = 1,
  73         .periods_max = 1024,
  74 };
  75
  76 struct aw2_pcm_device {
  77         struct snd_pcm *pcm;
  78         unsigned int stream_number;
  79         struct aw2 *chip;
  80 };
  81
  82 struct aw2 {
  83         struct snd_aw2_saa7146 saa7146;
  84
  85         struct pci_dev *pci;
  86         int irq;
  87         spinlock_t reg_lock;
  88         struct mutex mtx;
  89
  90         unsigned long iobase_phys;
  91         void __iomem *iobase_virt;
  92
  93         struct snd_card *card;
  94
  95         struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
  96         struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
  97 };
  98
  99 /*********************************
 100  * FUNCTION DECLARATIONS
 101  ********************************/
 102 static int snd_aw2_dev_free(struct snd_device *device);
 103 static int snd_aw2_create(struct snd_card *card,
 104                           struct pci_dev *pci, struct aw2 **rchip);
 105 static int snd_aw2_probe(struct pci_dev *pci,
 106                          const struct pci_device_id *pci_id);
 107 static void snd_aw2_remove(struct pci_dev *pci);
 108 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
 109 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
 110 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
 111 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
 112 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
 113 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
 114 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
 115                                         int cmd);
 116 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
 117                                        int cmd);
 118 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
 119                                                       *substream);
 120 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
 121                                                      *substream);
 122 static int snd_aw2_new_pcm(struct aw2 *chip);
 123
 124 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
 125                                                struct snd_ctl_elem_info *uinfo);
 126 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
 127                                               struct snd_ctl_elem_value
 128                                               *ucontrol);
 129 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
 130                                               struct snd_ctl_elem_value
 131                                               *ucontrol);
 132
 133 /*********************************
 134  * VARIABLES
 135  ********************************/
 136 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 137 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 138 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 139
 140 module_param_array(index, int, NULL, 0444);
 141 MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
 142 module_param_array(id, charp, NULL, 0444);
 143 MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
 144 module_param_array(enable, bool, NULL, 0444);
 145 MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
 146
 147 static const struct pci_device_id snd_aw2_ids[] = {
 148         {PCI_VENDOR_ID_PHILIPS, PCI_DEVICE_ID_PHILIPS_SAA7146, 0, 0,
 149          0, 0, 0},
 150         {0}
 151 };
 152
 153 MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
 154
 155 /* pci_driver definition */
 156 static struct pci_driver aw2_driver = {
 157         .name = KBUILD_MODNAME,
 158         .id_table = snd_aw2_ids,
 159         .probe = snd_aw2_probe,
 160         .remove = snd_aw2_remove,
 161 };
 162
 163 module_pci_driver(aw2_driver);
 164
 165 /* operators for playback PCM alsa interface */
 166 static const struct snd_pcm_ops snd_aw2_playback_ops = {
 167         .open = snd_aw2_pcm_playback_open,
 168         .close = snd_aw2_pcm_playback_close,
 169         .prepare = snd_aw2_pcm_prepare_playback,
 170         .trigger = snd_aw2_pcm_trigger_playback,
 171         .pointer = snd_aw2_pcm_pointer_playback,
 172 };
 173
 174 /* operators for capture PCM alsa interface */
 175 static const struct snd_pcm_ops snd_aw2_capture_ops = {
 176         .open = snd_aw2_pcm_capture_open,
 177         .close = snd_aw2_pcm_capture_close,
 178         .prepare = snd_aw2_pcm_prepare_capture,
 179         .trigger = snd_aw2_pcm_trigger_capture,
 180         .pointer = snd_aw2_pcm_pointer_capture,
 181 };
 182
 183 static const struct snd_kcontrol_new aw2_control = {
 184         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 185         .name = "PCM Capture Route",
 186         .index = 0,
 187         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 188         .private_value = 0xffff,
 189         .info = snd_aw2_control_switch_capture_info,
 190         .get = snd_aw2_control_switch_capture_get,
 191         .put = snd_aw2_control_switch_capture_put
 192 };
 193
 194 /*********************************
 195  * FUNCTION IMPLEMENTATIONS
 196  ********************************/
 197
 198 /* component-destructor */
 199 static int snd_aw2_dev_free(struct snd_device *device)
 200 {
 201         struct aw2 *chip = device->device_data;
 202
 203         /* Free hardware */
 204         snd_aw2_saa7146_free(&chip->saa7146);
 205
 206         /* release the irq */
 207         if (chip->irq >= 0)
 208                 free_irq(chip->irq, (void *)chip);
 209         /* release the i/o ports & memory */
 210         iounmap(chip->iobase_virt);
 211         pci_release_regions(chip->pci);
 212         /* disable the PCI entry */
 213         pci_disable_device(chip->pci);
 214         /* release the data */
 215         kfree(chip);
 216
 217         return 0;
 218 }
 219
 220 /* chip-specific constructor */
 221 static int snd_aw2_create(struct snd_card *card,
 222                           struct pci_dev *pci, struct aw2 **rchip)
 223 {
 224         struct aw2 *chip;
 225         int err;
 226         static struct snd_device_ops ops = {
 227                 .dev_free = snd_aw2_dev_free,
 228         };
 229
 230         *rchip = NULL;
 231
 232         /* initialize the PCI entry */
 233         err = pci_enable_device(pci);
 234         if (err < 0)
 235                 return err;
 236         pci_set_master(pci);
 237
 238         /* check PCI availability (32bit DMA) */
 239         if ((dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) ||
 240             (dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0)) {
 241                 dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
 242                 pci_disable_device(pci);
 243                 return -ENXIO;
 244         }
 245         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 246         if (chip == NULL) {
 247                 pci_disable_device(pci);
 248                 return -ENOMEM;
 249         }
 250
 251         /* initialize the stuff */
 252         chip->card = card;
 253         chip->pci = pci;
 254         chip->irq = -1;
 255
 256         /* (1) PCI resource allocation */
 257         err = pci_request_regions(pci, "Audiowerk2");
 258         if (err < 0) {
 259                 pci_disable_device(pci);
 260                 kfree(chip);
 261                 return err;
 262         }
 263         chip->iobase_phys = pci_resource_start(pci, 0);
 264         chip->iobase_virt =
 265                 ioremap_nocache(chip->iobase_phys,
 266                                 pci_resource_len(pci, 0));
 267
 268         if (chip->iobase_virt == NULL) {
 269                 dev_err(card->dev, "unable to remap memory region");
 270                 pci_release_regions(pci);
 271                 pci_disable_device(pci);
 272                 kfree(chip);
 273                 return -ENOMEM;
 274         }
 275
 276         /* (2) initialization of the chip hardware */
 277         snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
 278
 279         if (request_irq(pci->irq, snd_aw2_saa7146_interrupt,
 280                         IRQF_SHARED, KBUILD_MODNAME, chip)) {
 281                 dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
 282
 283                 iounmap(chip->iobase_virt);
 284                 pci_release_regions(chip->pci);
 285                 pci_disable_device(chip->pci);
 286                 kfree(chip);
 287                 return -EBUSY;
 288         }
 289         chip->irq = pci->irq;
 290         card->sync_irq = chip->irq;
 291
 292         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 293         if (err < 0) {
 294                 free_irq(chip->irq, (void *)chip);
 295                 iounmap(chip->iobase_virt);
 296                 pci_release_regions(chip->pci);
 297                 pci_disable_device(chip->pci);
 298                 kfree(chip);
 299                 return err;
 300         }
 301
 302         *rchip = chip;
 303
 304         dev_info(card->dev,
 305                  "Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
 306         return 0;
 307 }
 308
 309 /* constructor */
 310 static int snd_aw2_probe(struct pci_dev *pci,
 311                          const struct pci_device_id *pci_id)
 312 {
 313         static int dev;
 314         struct snd_card *card;
 315         struct aw2 *chip;
 316         int err;
 317
 318         /* (1) Continue if device is not enabled, else inc dev */
 319         if (dev >= SNDRV_CARDS)
 320                 return -ENODEV;
 321         if (!enable[dev]) {
 322                 dev++;
 323                 return -ENOENT;
 324         }
 325
 326         /* (2) Create card instance */
 327         err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
 328                            0, &card);
 329         if (err < 0)
 330                 return err;
 331
 332         /* (3) Create main component */
 333         err = snd_aw2_create(card, pci, &chip);
 334         if (err < 0) {
 335                 snd_card_free(card);
 336                 return err;
 337         }
 338
 339         /* initialize mutex */
 340         mutex_init(&chip->mtx);
 341         /* init spinlock */
 342         spin_lock_init(&chip->reg_lock);
 343         /* (4) Define driver ID and name string */
 344         strcpy(card->driver, "aw2");
 345         strcpy(card->shortname, "Audiowerk2");
 346
 347         sprintf(card->longname, "%s with SAA7146 irq %i",
 348                 card->shortname, chip->irq);
 349
 350         /* (5) Create other components */
 351         snd_aw2_new_pcm(chip);
 352
 353         /* (6) Register card instance */
 354         err = snd_card_register(card);
 355         if (err < 0) {
 356                 snd_card_free(card);
 357                 return err;
 358         }
 359
 360         /* (7) Set PCI driver data */
 361         pci_set_drvdata(pci, card);
 362
 363         dev++;
 364         return 0;
 365 }
 366
 367 /* destructor */
 368 static void snd_aw2_remove(struct pci_dev *pci)
 369 {
 370         snd_card_free(pci_get_drvdata(pci));
 371 }
 372
 373 /* open callback */
 374 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
 375 {
 376         struct snd_pcm_runtime *runtime = substream->runtime;
 377
 378         dev_dbg(substream->pcm->card->dev, "Playback_open\n");
 379         runtime->hw = snd_aw2_playback_hw;
 380         return 0;
 381 }
 382
 383 /* close callback */
 384 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
 385 {
 386         return 0;
 387
 388 }
 389
 390 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
 391 {
 392         struct snd_pcm_runtime *runtime = substream->runtime;
 393
 394         dev_dbg(substream->pcm->card->dev, "Capture_open\n");
 395         runtime->hw = snd_aw2_capture_hw;
 396         return 0;
 397 }
 398
 399 /* close callback */
 400 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
 401 {
 402         /* TODO: something to do ? */
 403         return 0;
 404 }
 405
 406 /* prepare callback for playback */
 407 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
 408 {
 409         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 410         struct aw2 *chip = pcm_device->chip;
 411         struct snd_pcm_runtime *runtime = substream->runtime;
 412         unsigned long period_size, buffer_size;
 413
 414         mutex_lock(&chip->mtx);
 415
 416         period_size = snd_pcm_lib_period_bytes(substream);
 417         buffer_size = snd_pcm_lib_buffer_bytes(substream);
 418
 419         snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
 420                                           pcm_device->stream_number,
 421                                           runtime->dma_addr, period_size,
 422                                           buffer_size);
 423
 424         /* Define Interrupt callback */
 425         snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
 426                                                     (snd_aw2_saa7146_it_cb)
 427                                                     snd_pcm_period_elapsed,
 428                                                     (void *)substream);
 429
 430         mutex_unlock(&chip->mtx);
 431
 432         return 0;
 433 }
 434
 435 /* prepare callback for capture */
 436 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
 437 {
 438         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 439         struct aw2 *chip = pcm_device->chip;
 440         struct snd_pcm_runtime *runtime = substream->runtime;
 441         unsigned long period_size, buffer_size;
 442
 443         mutex_lock(&chip->mtx);
 444
 445         period_size = snd_pcm_lib_period_bytes(substream);
 446         buffer_size = snd_pcm_lib_buffer_bytes(substream);
 447
 448         snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
 449                                          pcm_device->stream_number,
 450                                          runtime->dma_addr, period_size,
 451                                          buffer_size);
 452
 453         /* Define Interrupt callback */
 454         snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
 455                                                    (snd_aw2_saa7146_it_cb)
 456                                                    snd_pcm_period_elapsed,
 457                                                    (void *)substream);
 458
 459         mutex_unlock(&chip->mtx);
 460
 461         return 0;
 462 }
 463
 464 /* playback trigger callback */
 465 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
 466                                         int cmd)
 467 {
 468         int status = 0;
 469         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 470         struct aw2 *chip = pcm_device->chip;
 471         spin_lock(&chip->reg_lock);
 472         switch (cmd) {
 473         case SNDRV_PCM_TRIGGER_START:
 474                 snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
 475                                                            pcm_device->
 476                                                            stream_number);
 477                 break;
 478         case SNDRV_PCM_TRIGGER_STOP:
 479                 snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
 480                                                           pcm_device->
 481                                                           stream_number);
 482                 break;
 483         default:
 484                 status = -EINVAL;
 485         }
 486         spin_unlock(&chip->reg_lock);
 487         return status;
 488 }
 489
 490 /* capture trigger callback */
 491 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
 492                                        int cmd)
 493 {
 494         int status = 0;
 495         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 496         struct aw2 *chip = pcm_device->chip;
 497         spin_lock(&chip->reg_lock);
 498         switch (cmd) {
 499         case SNDRV_PCM_TRIGGER_START:
 500                 snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
 501                                                           pcm_device->
 502                                                           stream_number);
 503                 break;
 504         case SNDRV_PCM_TRIGGER_STOP:
 505                 snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
 506                                                          pcm_device->
 507                                                          stream_number);
 508                 break;
 509         default:
 510                 status = -EINVAL;
 511         }
 512         spin_unlock(&chip->reg_lock);
 513         return status;
 514 }
 515
 516 /* playback pointer callback */
 517 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
 518                                                       *substream)
 519 {
 520         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 521         struct aw2 *chip = pcm_device->chip;
 522         unsigned int current_ptr;
 523
 524         /* get the current hardware pointer */
 525         struct snd_pcm_runtime *runtime = substream->runtime;
 526         current_ptr =
 527                 snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
 528                                                     pcm_device->stream_number,
 529                                                     runtime->dma_area,
 530                                                     runtime->buffer_size);
 531
 532         return bytes_to_frames(substream->runtime, current_ptr);
 533 }
 534
 535 /* capture pointer callback */
 536 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
 537                                                      *substream)
 538 {
 539         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 540         struct aw2 *chip = pcm_device->chip;
 541         unsigned int current_ptr;
 542
 543         /* get the current hardware pointer */
 544         struct snd_pcm_runtime *runtime = substream->runtime;
 545         current_ptr =
 546                 snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
 547                                                    pcm_device->stream_number,
 548                                                    runtime->dma_area,
 549                                                    runtime->buffer_size);
 550
 551         return bytes_to_frames(substream->runtime, current_ptr);
 552 }
 553
 554 /* create a pcm device */
 555 static int snd_aw2_new_pcm(struct aw2 *chip)
 556 {
 557         struct snd_pcm *pcm_playback_ana;
 558         struct snd_pcm *pcm_playback_num;
 559         struct snd_pcm *pcm_capture;
 560         struct aw2_pcm_device *pcm_device;
 561         int err = 0;
 562
 563         /* Create new Alsa PCM device */
 564
 565         err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
 566                           &pcm_playback_ana);
 567         if (err < 0) {
 568                 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
 569                 return err;
 570         }
 571
 572         /* Creation ok */
 573         pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
 574
 575         /* Set PCM device name */
 576         strcpy(pcm_playback_ana->name, "Analog playback");
 577         /* Associate private data to PCM device */
 578         pcm_playback_ana->private_data = pcm_device;
 579         /* set operators of PCM device */
 580         snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
 581                         &snd_aw2_playback_ops);
 582         /* store PCM device */
 583         pcm_device->pcm = pcm_playback_ana;
 584         /* give base chip pointer to our internal pcm device
 585            structure */
 586         pcm_device->chip = chip;
 587         /* Give stream number to PCM device */
 588         pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
 589
 590         /* pre-allocation of buffers */
 591         /* Preallocate continuous pages. */
 592         snd_pcm_set_managed_buffer_all(pcm_playback_ana,
 593                                        SNDRV_DMA_TYPE_DEV,
 594                                        &chip->pci->dev,
 595                                        64 * 1024, 64 * 1024);
 596
 597         err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
 598                           &pcm_playback_num);
 599
 600         if (err < 0) {
 601                 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
 602                 return err;
 603         }
 604         /* Creation ok */
 605         pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
 606
 607         /* Set PCM device name */
 608         strcpy(pcm_playback_num->name, "Digital playback");
 609         /* Associate private data to PCM device */
 610         pcm_playback_num->private_data = pcm_device;
 611         /* set operators of PCM device */
 612         snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
 613                         &snd_aw2_playback_ops);
 614         /* store PCM device */
 615         pcm_device->pcm = pcm_playback_num;
 616         /* give base chip pointer to our internal pcm device
 617            structure */
 618         pcm_device->chip = chip;
 619         /* Give stream number to PCM device */
 620         pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
 621
 622         /* pre-allocation of buffers */
 623         /* Preallocate continuous pages. */
 624         snd_pcm_set_managed_buffer_all(pcm_playback_num,
 625                                        SNDRV_DMA_TYPE_DEV,
 626                                        &chip->pci->dev,
 627                                        64 * 1024, 64 * 1024);
 628
 629         err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
 630                           &pcm_capture);
 631
 632         if (err < 0) {
 633                 dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
 634                 return err;
 635         }
 636
 637         /* Creation ok */
 638         pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
 639
 640         /* Set PCM device name */
 641         strcpy(pcm_capture->name, "Capture");
 642         /* Associate private data to PCM device */
 643         pcm_capture->private_data = pcm_device;
 644         /* set operators of PCM device */
 645         snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
 646                         &snd_aw2_capture_ops);
 647         /* store PCM device */
 648         pcm_device->pcm = pcm_capture;
 649         /* give base chip pointer to our internal pcm device
 650            structure */
 651         pcm_device->chip = chip;
 652         /* Give stream number to PCM device */
 653         pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
 654
 655         /* pre-allocation of buffers */
 656         /* Preallocate continuous pages. */
 657         snd_pcm_set_managed_buffer_all(pcm_capture,
 658                                        SNDRV_DMA_TYPE_DEV,
 659                                        &chip->pci->dev,
 660                                        64 * 1024, 64 * 1024);
 661
 662         /* Create control */
 663         err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
 664         if (err < 0) {
 665                 dev_err(chip->card->dev, "snd_ctl_add error (0x%X)\n", err);
 666                 return err;
 667         }
 668
 669         return 0;
 670 }
 671
 672 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
 673                                                struct snd_ctl_elem_info *uinfo)
 674 {
 675         static const char * const texts[2] = {
 676                 "Analog", "Digital"
 677         };
 678         return snd_ctl_enum_info(uinfo, 1, 2, texts);
 679 }
 680
 681 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
 682                                               struct snd_ctl_elem_value
 683                                               *ucontrol)
 684 {
 685         struct aw2 *chip = snd_kcontrol_chip(kcontrol);
 686         if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
 687                 ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
 688         else
 689                 ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
 690         return 0;
 691 }
 692
 693 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
 694                                               struct snd_ctl_elem_value
 695                                               *ucontrol)
 696 {
 697         struct aw2 *chip = snd_kcontrol_chip(kcontrol);
 698         int changed = 0;
 699         int is_disgital =
 700             snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
 701
 702         if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
 703              && !is_disgital)
 704             || ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
 705                 && is_disgital)) {
 706                 snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
 707                 changed = 1;
 708         }
 709         return changed;
 710 }