git.oblomov.eu Git - linux-2.6/blob - sound/pci/aw2/aw2-alsa.c

   1 /*****************************************************************************
   2  *
   3  * Copyright (C) 2008 Cedric Bregardis <cedric.bregardis@free.fr> and
   4  * Jean-Christian Hassler <jhassler@free.fr>
   5  *
   6  * This file is part of the Audiowerk2 ALSA driver
   7  *
   8  * The Audiowerk2 ALSA driver is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2.
  11  *
  12  * The Audiowerk2 ALSA driver 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 the Audiowerk2 ALSA driver; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  20  * USA.
  21  *
  22  *****************************************************************************/
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/slab.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/delay.h>
  29 #include <asm/io.h>
  30 #include <sound/core.h>
  31 #include <sound/initval.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/control.h>
  35
  36 #include "saa7146.h"
  37 #include "aw2-saa7146.h"
  38
  39 MODULE_AUTHOR("Cedric Bregardis <cedric.bregardis@free.fr>, "
  40               "Jean-Christian Hassler <jhassler@free.fr>");
  41 MODULE_DESCRIPTION("Emagic Audiowerk 2 sound driver");
  42 MODULE_LICENSE("GPL");
  43
  44 /*********************************
  45  * DEFINES
  46  ********************************/
  47 #define PCI_VENDOR_ID_SAA7146             0x1131
  48 #define PCI_DEVICE_ID_SAA7146             0x7146
  49
  50 #define CTL_ROUTE_ANALOG 0
  51 #define CTL_ROUTE_DIGITAL 1
  52
  53 /*********************************
  54  * TYPEDEFS
  55  ********************************/
  56   /* hardware definition */
  57 static struct snd_pcm_hardware snd_aw2_playback_hw = {
  58         .info = (SNDRV_PCM_INFO_MMAP |
  59                  SNDRV_PCM_INFO_INTERLEAVED |
  60                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
  61         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  62         .rates = SNDRV_PCM_RATE_44100,
  63         .rate_min = 44100,
  64         .rate_max = 44100,
  65         .channels_min = 2,
  66         .channels_max = 4,
  67         .buffer_bytes_max = 32768,
  68         .period_bytes_min = 4096,
  69         .period_bytes_max = 32768,
  70         .periods_min = 1,
  71         .periods_max = 1024,
  72 };
  73
  74 static struct snd_pcm_hardware snd_aw2_capture_hw = {
  75         .info = (SNDRV_PCM_INFO_MMAP |
  76                  SNDRV_PCM_INFO_INTERLEAVED |
  77                  SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP_VALID),
  78         .formats = SNDRV_PCM_FMTBIT_S16_LE,
  79         .rates = SNDRV_PCM_RATE_44100,
  80         .rate_min = 44100,
  81         .rate_max = 44100,
  82         .channels_min = 2,
  83         .channels_max = 2,
  84         .buffer_bytes_max = 32768,
  85         .period_bytes_min = 4096,
  86         .period_bytes_max = 32768,
  87         .periods_min = 1,
  88         .periods_max = 1024,
  89 };
  90
  91 struct aw2_pcm_device {
  92         struct snd_pcm *pcm;
  93         unsigned int stream_number;
  94         struct aw2 *chip;
  95 };
  96
  97 struct aw2 {
  98         struct snd_aw2_saa7146 saa7146;
  99
 100         struct pci_dev *pci;
 101         int irq;
 102         spinlock_t reg_lock;
 103         struct mutex mtx;
 104
 105         unsigned long iobase_phys;
 106         void __iomem *iobase_virt;
 107
 108         struct snd_card *card;
 109
 110         struct aw2_pcm_device device_playback[NB_STREAM_PLAYBACK];
 111         struct aw2_pcm_device device_capture[NB_STREAM_CAPTURE];
 112 };
 113
 114 /*********************************
 115  * FUNCTION DECLARATIONS
 116  ********************************/
 117 static int __init alsa_card_aw2_init(void);
 118 static void __exit alsa_card_aw2_exit(void);
 119 static int snd_aw2_dev_free(struct snd_device *device);
 120 static int __devinit snd_aw2_create(struct snd_card *card,
 121                                     struct pci_dev *pci, struct aw2 **rchip);
 122 static int __devinit snd_aw2_probe(struct pci_dev *pci,
 123                                    const struct pci_device_id *pci_id);
 124 static void __devexit snd_aw2_remove(struct pci_dev *pci);
 125 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream);
 126 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream);
 127 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream);
 128 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream);
 129 static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
 130                                  struct snd_pcm_hw_params *hw_params);
 131 static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream);
 132 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream);
 133 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream);
 134 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
 135                                         int cmd);
 136 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
 137                                        int cmd);
 138 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
 139                                                       *substream);
 140 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
 141                                                      *substream);
 142 static int __devinit snd_aw2_new_pcm(struct aw2 *chip);
 143
 144 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
 145                                                struct snd_ctl_elem_info *uinfo);
 146 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
 147                                               struct snd_ctl_elem_value
 148                                               *ucontrol);
 149 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
 150                                               struct snd_ctl_elem_value
 151                                               *ucontrol);
 152
 153 /*********************************
 154  * VARIABLES
 155  ********************************/
 156 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
 157 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
 158 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
 159
 160 module_param_array(index, int, NULL, 0444);
 161 MODULE_PARM_DESC(index, "Index value for Audiowerk2 soundcard.");
 162 module_param_array(id, charp, NULL, 0444);
 163 MODULE_PARM_DESC(id, "ID string for the Audiowerk2 soundcard.");
 164 module_param_array(enable, bool, NULL, 0444);
 165 MODULE_PARM_DESC(enable, "Enable Audiowerk2 soundcard.");
 166
 167 static struct pci_device_id snd_aw2_ids[] = {
 168         {PCI_VENDOR_ID_SAA7146, PCI_DEVICE_ID_SAA7146, PCI_ANY_ID, PCI_ANY_ID,
 169          0, 0, 0},
 170         {0}
 171 };
 172
 173 MODULE_DEVICE_TABLE(pci, snd_aw2_ids);
 174
 175 /* pci_driver definition */
 176 static struct pci_driver driver = {
 177         .name = "Emagic Audiowerk 2",
 178         .id_table = snd_aw2_ids,
 179         .probe = snd_aw2_probe,
 180         .remove = __devexit_p(snd_aw2_remove),
 181 };
 182
 183 /* operators for playback PCM alsa interface */
 184 static struct snd_pcm_ops snd_aw2_playback_ops = {
 185         .open = snd_aw2_pcm_playback_open,
 186         .close = snd_aw2_pcm_playback_close,
 187         .ioctl = snd_pcm_lib_ioctl,
 188         .hw_params = snd_aw2_pcm_hw_params,
 189         .hw_free = snd_aw2_pcm_hw_free,
 190         .prepare = snd_aw2_pcm_prepare_playback,
 191         .trigger = snd_aw2_pcm_trigger_playback,
 192         .pointer = snd_aw2_pcm_pointer_playback,
 193 };
 194
 195 /* operators for capture PCM alsa interface */
 196 static struct snd_pcm_ops snd_aw2_capture_ops = {
 197         .open = snd_aw2_pcm_capture_open,
 198         .close = snd_aw2_pcm_capture_close,
 199         .ioctl = snd_pcm_lib_ioctl,
 200         .hw_params = snd_aw2_pcm_hw_params,
 201         .hw_free = snd_aw2_pcm_hw_free,
 202         .prepare = snd_aw2_pcm_prepare_capture,
 203         .trigger = snd_aw2_pcm_trigger_capture,
 204         .pointer = snd_aw2_pcm_pointer_capture,
 205 };
 206
 207 static struct snd_kcontrol_new aw2_control __devinitdata = {
 208         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 209         .name = "PCM Capture Route",
 210         .index = 0,
 211         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 212         .private_value = 0xffff,
 213         .info = snd_aw2_control_switch_capture_info,
 214         .get = snd_aw2_control_switch_capture_get,
 215         .put = snd_aw2_control_switch_capture_put
 216 };
 217
 218 /*********************************
 219  * FUNCTION IMPLEMENTATIONS
 220  ********************************/
 221
 222 /* initialization of the module */
 223 static int __init alsa_card_aw2_init(void)
 224 {
 225         snd_printdd(KERN_DEBUG "aw2: Load aw2 module\n");
 226         return pci_register_driver(&driver);
 227 }
 228
 229 /* clean up the module */
 230 static void __exit alsa_card_aw2_exit(void)
 231 {
 232         snd_printdd(KERN_DEBUG "aw2: Unload aw2 module\n");
 233         pci_unregister_driver(&driver);
 234 }
 235
 236 module_init(alsa_card_aw2_init);
 237 module_exit(alsa_card_aw2_exit);
 238
 239 /* component-destructor */
 240 static int snd_aw2_dev_free(struct snd_device *device)
 241 {
 242         struct aw2 *chip = device->device_data;
 243
 244         /* Free hardware */
 245         snd_aw2_saa7146_free(&chip->saa7146);
 246
 247         /* release the irq */
 248         if (chip->irq >= 0)
 249                 free_irq(chip->irq, (void *)chip);
 250         /* release the i/o ports & memory */
 251         if (chip->iobase_virt)
 252                 iounmap(chip->iobase_virt);
 253
 254         pci_release_regions(chip->pci);
 255         /* disable the PCI entry */
 256         pci_disable_device(chip->pci);
 257         /* release the data */
 258         kfree(chip);
 259
 260         return 0;
 261 }
 262
 263 /* chip-specific constructor */
 264 static int __devinit snd_aw2_create(struct snd_card *card,
 265                                     struct pci_dev *pci, struct aw2 **rchip)
 266 {
 267         struct aw2 *chip;
 268         int err;
 269         static struct snd_device_ops ops = {
 270                 .dev_free = snd_aw2_dev_free,
 271         };
 272
 273         *rchip = NULL;
 274
 275         /* initialize the PCI entry */
 276         err = pci_enable_device(pci);
 277         if (err < 0)
 278                 return err;
 279         pci_set_master(pci);
 280
 281         /* check PCI availability (32bit DMA) */
 282         if ((pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0) ||
 283             (pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0)) {
 284                 printk(KERN_ERR "aw2: Impossible to set 32bit mask DMA\n");
 285                 pci_disable_device(pci);
 286                 return -ENXIO;
 287         }
 288         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 289         if (chip == NULL) {
 290                 pci_disable_device(pci);
 291                 return -ENOMEM;
 292         }
 293
 294         /* initialize the stuff */
 295         chip->card = card;
 296         chip->pci = pci;
 297         chip->irq = -1;
 298
 299         /* (1) PCI resource allocation */
 300         err = pci_request_regions(pci, "Audiowerk2");
 301         if (err < 0) {
 302                 pci_disable_device(pci);
 303                 kfree(chip);
 304                 return err;
 305         }
 306         chip->iobase_phys = pci_resource_start(pci, 0);
 307         chip->iobase_virt =
 308                 ioremap_nocache(chip->iobase_phys,
 309                                 pci_resource_len(pci, 0));
 310
 311         if (chip->iobase_virt == NULL) {
 312                 printk(KERN_ERR "aw2: unable to remap memory region");
 313                 pci_release_regions(pci);
 314                 pci_disable_device(pci);
 315                 kfree(chip);
 316                 return -ENOMEM;
 317         }
 318
 319
 320         if (request_irq(pci->irq, snd_aw2_saa7146_interrupt,
 321                         IRQF_SHARED, "Audiowerk2", chip)) {
 322                 printk(KERN_ERR "aw2: Cannot grab irq %d\n", pci->irq);
 323
 324                 iounmap(chip->iobase_virt);
 325                 pci_release_regions(chip->pci);
 326                 pci_disable_device(chip->pci);
 327                 kfree(chip);
 328                 return -EBUSY;
 329         }
 330         chip->irq = pci->irq;
 331
 332         /* (2) initialization of the chip hardware */
 333         snd_aw2_saa7146_setup(&chip->saa7146, chip->iobase_virt);
 334         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
 335         if (err < 0) {
 336                 free_irq(chip->irq, (void *)chip);
 337                 iounmap(chip->iobase_virt);
 338                 pci_release_regions(chip->pci);
 339                 pci_disable_device(chip->pci);
 340                 kfree(chip);
 341                 return err;
 342         }
 343
 344         snd_card_set_dev(card, &pci->dev);
 345         *rchip = chip;
 346
 347         printk(KERN_INFO
 348                "Audiowerk 2 sound card (saa7146 chipset) detected and "
 349                "managed\n");
 350         return 0;
 351 }
 352
 353 /* constructor */
 354 static int __devinit snd_aw2_probe(struct pci_dev *pci,
 355                                    const struct pci_device_id *pci_id)
 356 {
 357         static int dev;
 358         struct snd_card *card;
 359         struct aw2 *chip;
 360         int err;
 361
 362         /* (1) Continue if device is not enabled, else inc dev */
 363         if (dev >= SNDRV_CARDS)
 364                 return -ENODEV;
 365         if (!enable[dev]) {
 366                 dev++;
 367                 return -ENOENT;
 368         }
 369
 370         /* (2) Create card instance */
 371         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
 372         if (card == NULL)
 373                 return -ENOMEM;
 374
 375         /* (3) Create main component */
 376         err = snd_aw2_create(card, pci, &chip);
 377         if (err < 0) {
 378                 snd_card_free(card);
 379                 return err;
 380         }
 381
 382         /* initialize mutex */
 383         mutex_init(&chip->mtx);
 384         /* init spinlock */
 385         spin_lock_init(&chip->reg_lock);
 386         /* (4) Define driver ID and name string */
 387         strcpy(card->driver, "aw2");
 388         strcpy(card->shortname, "Audiowerk2");
 389
 390         sprintf(card->longname, "%s with SAA7146 irq %i",
 391                 card->shortname, chip->irq);
 392
 393         /* (5) Create other components */
 394         snd_aw2_new_pcm(chip);
 395
 396         /* (6) Register card instance */
 397         err = snd_card_register(card);
 398         if (err < 0) {
 399                 snd_card_free(card);
 400                 return err;
 401         }
 402
 403         /* (7) Set PCI driver data */
 404         pci_set_drvdata(pci, card);
 405
 406         dev++;
 407         return 0;
 408 }
 409
 410 /* destructor */
 411 static void __devexit snd_aw2_remove(struct pci_dev *pci)
 412 {
 413         snd_card_free(pci_get_drvdata(pci));
 414         pci_set_drvdata(pci, NULL);
 415 }
 416
 417 /* open callback */
 418 static int snd_aw2_pcm_playback_open(struct snd_pcm_substream *substream)
 419 {
 420         struct snd_pcm_runtime *runtime = substream->runtime;
 421
 422         snd_printdd(KERN_DEBUG "aw2: Playback_open \n");
 423         runtime->hw = snd_aw2_playback_hw;
 424         return 0;
 425 }
 426
 427 /* close callback */
 428 static int snd_aw2_pcm_playback_close(struct snd_pcm_substream *substream)
 429 {
 430         return 0;
 431
 432 }
 433
 434 static int snd_aw2_pcm_capture_open(struct snd_pcm_substream *substream)
 435 {
 436         struct snd_pcm_runtime *runtime = substream->runtime;
 437
 438         snd_printdd(KERN_DEBUG "aw2: Capture_open \n");
 439         runtime->hw = snd_aw2_capture_hw;
 440         return 0;
 441 }
 442
 443 /* close callback */
 444 static int snd_aw2_pcm_capture_close(struct snd_pcm_substream *substream)
 445 {
 446         /* TODO: something to do ? */
 447         return 0;
 448 }
 449
 450  /* hw_params callback */
 451 static int snd_aw2_pcm_hw_params(struct snd_pcm_substream *substream,
 452                                  struct snd_pcm_hw_params *hw_params)
 453 {
 454         return snd_pcm_lib_malloc_pages(substream,
 455                                         params_buffer_bytes(hw_params));
 456 }
 457
 458 /* hw_free callback */
 459 static int snd_aw2_pcm_hw_free(struct snd_pcm_substream *substream)
 460 {
 461         return snd_pcm_lib_free_pages(substream);
 462 }
 463
 464 /* prepare callback for playback */
 465 static int snd_aw2_pcm_prepare_playback(struct snd_pcm_substream *substream)
 466 {
 467         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 468         struct aw2 *chip = pcm_device->chip;
 469         struct snd_pcm_runtime *runtime = substream->runtime;
 470         unsigned long period_size, buffer_size;
 471
 472         mutex_lock(&chip->mtx);
 473
 474         period_size = snd_pcm_lib_period_bytes(substream);
 475         buffer_size = snd_pcm_lib_buffer_bytes(substream);
 476
 477         snd_aw2_saa7146_pcm_init_playback(&chip->saa7146,
 478                                           pcm_device->stream_number,
 479                                           runtime->dma_addr, period_size,
 480                                           buffer_size);
 481
 482         /* Define Interrupt callback */
 483         snd_aw2_saa7146_define_it_playback_callback(pcm_device->stream_number,
 484                                                     (snd_aw2_saa7146_it_cb)
 485                                                     snd_pcm_period_elapsed,
 486                                                     (void *)substream);
 487
 488         mutex_unlock(&chip->mtx);
 489
 490         return 0;
 491 }
 492
 493 /* prepare callback for capture */
 494 static int snd_aw2_pcm_prepare_capture(struct snd_pcm_substream *substream)
 495 {
 496         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 497         struct aw2 *chip = pcm_device->chip;
 498         struct snd_pcm_runtime *runtime = substream->runtime;
 499         unsigned long period_size, buffer_size;
 500
 501         mutex_lock(&chip->mtx);
 502
 503         period_size = snd_pcm_lib_period_bytes(substream);
 504         buffer_size = snd_pcm_lib_buffer_bytes(substream);
 505
 506         snd_aw2_saa7146_pcm_init_capture(&chip->saa7146,
 507                                          pcm_device->stream_number,
 508                                          runtime->dma_addr, period_size,
 509                                          buffer_size);
 510
 511         /* Define Interrupt callback */
 512         snd_aw2_saa7146_define_it_capture_callback(pcm_device->stream_number,
 513                                                    (snd_aw2_saa7146_it_cb)
 514                                                    snd_pcm_period_elapsed,
 515                                                    (void *)substream);
 516
 517         mutex_unlock(&chip->mtx);
 518
 519         return 0;
 520 }
 521
 522 /* playback trigger callback */
 523 static int snd_aw2_pcm_trigger_playback(struct snd_pcm_substream *substream,
 524                                         int cmd)
 525 {
 526         int status = 0;
 527         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 528         struct aw2 *chip = pcm_device->chip;
 529         spin_lock(&chip->reg_lock);
 530         switch (cmd) {
 531         case SNDRV_PCM_TRIGGER_START:
 532                 snd_aw2_saa7146_pcm_trigger_start_playback(&chip->saa7146,
 533                                                            pcm_device->
 534                                                            stream_number);
 535                 break;
 536         case SNDRV_PCM_TRIGGER_STOP:
 537                 snd_aw2_saa7146_pcm_trigger_stop_playback(&chip->saa7146,
 538                                                           pcm_device->
 539                                                           stream_number);
 540                 break;
 541         default:
 542                 status = -EINVAL;
 543         }
 544         spin_unlock(&chip->reg_lock);
 545         return status;
 546 }
 547
 548 /* capture trigger callback */
 549 static int snd_aw2_pcm_trigger_capture(struct snd_pcm_substream *substream,
 550                                        int cmd)
 551 {
 552         int status = 0;
 553         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 554         struct aw2 *chip = pcm_device->chip;
 555         spin_lock(&chip->reg_lock);
 556         switch (cmd) {
 557         case SNDRV_PCM_TRIGGER_START:
 558                 snd_aw2_saa7146_pcm_trigger_start_capture(&chip->saa7146,
 559                                                           pcm_device->
 560                                                           stream_number);
 561                 break;
 562         case SNDRV_PCM_TRIGGER_STOP:
 563                 snd_aw2_saa7146_pcm_trigger_stop_capture(&chip->saa7146,
 564                                                          pcm_device->
 565                                                          stream_number);
 566                 break;
 567         default:
 568                 status = -EINVAL;
 569         }
 570         spin_unlock(&chip->reg_lock);
 571         return status;
 572 }
 573
 574 /* playback pointer callback */
 575 static snd_pcm_uframes_t snd_aw2_pcm_pointer_playback(struct snd_pcm_substream
 576                                                       *substream)
 577 {
 578         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 579         struct aw2 *chip = pcm_device->chip;
 580         unsigned int current_ptr;
 581
 582         /* get the current hardware pointer */
 583         struct snd_pcm_runtime *runtime = substream->runtime;
 584         current_ptr =
 585                 snd_aw2_saa7146_get_hw_ptr_playback(&chip->saa7146,
 586                                                     pcm_device->stream_number,
 587                                                     runtime->dma_area,
 588                                                     runtime->buffer_size);
 589
 590         return bytes_to_frames(substream->runtime, current_ptr);
 591 }
 592
 593 /* capture pointer callback */
 594 static snd_pcm_uframes_t snd_aw2_pcm_pointer_capture(struct snd_pcm_substream
 595                                                      *substream)
 596 {
 597         struct aw2_pcm_device *pcm_device = snd_pcm_substream_chip(substream);
 598         struct aw2 *chip = pcm_device->chip;
 599         unsigned int current_ptr;
 600
 601         /* get the current hardware pointer */
 602         struct snd_pcm_runtime *runtime = substream->runtime;
 603         current_ptr =
 604                 snd_aw2_saa7146_get_hw_ptr_capture(&chip->saa7146,
 605                                                    pcm_device->stream_number,
 606                                                    runtime->dma_area,
 607                                                    runtime->buffer_size);
 608
 609         return bytes_to_frames(substream->runtime, current_ptr);
 610 }
 611
 612 /* create a pcm device */
 613 static int __devinit snd_aw2_new_pcm(struct aw2 *chip)
 614 {
 615         struct snd_pcm *pcm_playback_ana;
 616         struct snd_pcm *pcm_playback_num;
 617         struct snd_pcm *pcm_capture;
 618         struct aw2_pcm_device *pcm_device;
 619         int err = 0;
 620
 621         /* Create new Alsa PCM device */
 622
 623         err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
 624                           &pcm_playback_ana);
 625         if (err < 0) {
 626                 printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
 627                 return err;
 628         }
 629
 630         /* Creation ok */
 631         pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
 632
 633         /* Set PCM device name */
 634         strcpy(pcm_playback_ana->name, "Analog playback");
 635         /* Associate private data to PCM device */
 636         pcm_playback_ana->private_data = pcm_device;
 637         /* set operators of PCM device */
 638         snd_pcm_set_ops(pcm_playback_ana, SNDRV_PCM_STREAM_PLAYBACK,
 639                         &snd_aw2_playback_ops);
 640         /* store PCM device */
 641         pcm_device->pcm = pcm_playback_ana;
 642         /* give base chip pointer to our internal pcm device
 643            structure */
 644         pcm_device->chip = chip;
 645         /* Give stream number to PCM device */
 646         pcm_device->stream_number = NUM_STREAM_PLAYBACK_ANA;
 647
 648         /* pre-allocation of buffers */
 649         /* Preallocate continuous pages. */
 650         err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_ana,
 651                                                     SNDRV_DMA_TYPE_DEV,
 652                                                     snd_dma_pci_data
 653                                                     (chip->pci),
 654                                                     64 * 1024, 64 * 1024);
 655         if (err)
 656                 printk(KERN_ERR "aw2: snd_pcm_lib_preallocate_pages_for_all "
 657                        "error (0x%X)\n", err);
 658
 659         err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
 660                           &pcm_playback_num);
 661
 662         if (err < 0) {
 663                 printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
 664                 return err;
 665         }
 666         /* Creation ok */
 667         pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
 668
 669         /* Set PCM device name */
 670         strcpy(pcm_playback_num->name, "Digital playback");
 671         /* Associate private data to PCM device */
 672         pcm_playback_num->private_data = pcm_device;
 673         /* set operators of PCM device */
 674         snd_pcm_set_ops(pcm_playback_num, SNDRV_PCM_STREAM_PLAYBACK,
 675                         &snd_aw2_playback_ops);
 676         /* store PCM device */
 677         pcm_device->pcm = pcm_playback_num;
 678         /* give base chip pointer to our internal pcm device
 679            structure */
 680         pcm_device->chip = chip;
 681         /* Give stream number to PCM device */
 682         pcm_device->stream_number = NUM_STREAM_PLAYBACK_DIG;
 683
 684         /* pre-allocation of buffers */
 685         /* Preallocate continuous pages. */
 686         err = snd_pcm_lib_preallocate_pages_for_all(pcm_playback_num,
 687                                                     SNDRV_DMA_TYPE_DEV,
 688                                                     snd_dma_pci_data
 689                                                     (chip->pci),
 690                                                     64 * 1024, 64 * 1024);
 691         if (err)
 692                 printk(KERN_ERR
 693                        "aw2: snd_pcm_lib_preallocate_pages_for_all error "
 694                        "(0x%X)\n", err);
 695
 696
 697
 698         err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
 699                           &pcm_capture);
 700
 701         if (err < 0) {
 702                 printk(KERN_ERR "aw2: snd_pcm_new error (0x%X)\n", err);
 703                 return err;
 704         }
 705
 706         /* Creation ok */
 707         pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
 708
 709         /* Set PCM device name */
 710         strcpy(pcm_capture->name, "Capture");
 711         /* Associate private data to PCM device */
 712         pcm_capture->private_data = pcm_device;
 713         /* set operators of PCM device */
 714         snd_pcm_set_ops(pcm_capture, SNDRV_PCM_STREAM_CAPTURE,
 715                         &snd_aw2_capture_ops);
 716         /* store PCM device */
 717         pcm_device->pcm = pcm_capture;
 718         /* give base chip pointer to our internal pcm device
 719            structure */
 720         pcm_device->chip = chip;
 721         /* Give stream number to PCM device */
 722         pcm_device->stream_number = NUM_STREAM_CAPTURE_ANA;
 723
 724         /* pre-allocation of buffers */
 725         /* Preallocate continuous pages. */
 726         err = snd_pcm_lib_preallocate_pages_for_all(pcm_capture,
 727                                                     SNDRV_DMA_TYPE_DEV,
 728                                                     snd_dma_pci_data
 729                                                     (chip->pci),
 730                                                     64 * 1024, 64 * 1024);
 731         if (err)
 732                 printk(KERN_ERR
 733                        "aw2: snd_pcm_lib_preallocate_pages_for_all error "
 734                        "(0x%X)\n", err);
 735
 736
 737         /* Create control */
 738         err = snd_ctl_add(chip->card, snd_ctl_new1(&aw2_control, chip));
 739         if (err < 0) {
 740                 printk(KERN_ERR "aw2: snd_ctl_add error (0x%X)\n", err);
 741                 return err;
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
 748                                                struct snd_ctl_elem_info *uinfo)
 749 {
 750         static char *texts[2] = {
 751                 "Analog", "Digital"
 752         };
 753         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 754         uinfo->count = 1;
 755         uinfo->value.enumerated.items = 2;
 756         if (uinfo->value.enumerated.item >= uinfo->value.enumerated.items) {
 757                 uinfo->value.enumerated.item =
 758                     uinfo->value.enumerated.items - 1;
 759         }
 760         strcpy(uinfo->value.enumerated.name,
 761                texts[uinfo->value.enumerated.item]);
 762         return 0;
 763 }
 764
 765 static int snd_aw2_control_switch_capture_get(struct snd_kcontrol *kcontrol,
 766                                               struct snd_ctl_elem_value
 767                                               *ucontrol)
 768 {
 769         struct aw2 *chip = snd_kcontrol_chip(kcontrol);
 770         if (snd_aw2_saa7146_is_using_digital_input(&chip->saa7146))
 771                 ucontrol->value.enumerated.item[0] = CTL_ROUTE_DIGITAL;
 772         else
 773                 ucontrol->value.enumerated.item[0] = CTL_ROUTE_ANALOG;
 774         return 0;
 775 }
 776
 777 static int snd_aw2_control_switch_capture_put(struct snd_kcontrol *kcontrol,
 778                                               struct snd_ctl_elem_value
 779                                               *ucontrol)
 780 {
 781         struct aw2 *chip = snd_kcontrol_chip(kcontrol);
 782         int changed = 0;
 783         int is_disgital =
 784             snd_aw2_saa7146_is_using_digital_input(&chip->saa7146);
 785
 786         if (((ucontrol->value.integer.value[0] == CTL_ROUTE_DIGITAL)
 787              && !is_disgital)
 788             || ((ucontrol->value.integer.value[0] == CTL_ROUTE_ANALOG)
 789                 && is_disgital)) {
 790                 snd_aw2_saa7146_use_digital_input(&chip->saa7146, !is_disgital);
 791                 changed = 1;
 792         }
 793         return changed;
 794 }