sound/pci/sis7019.c

   1 /*
   2  *  Driver for SiS7019 Audio Accelerator
   3  *
   4  *  Copyright (C) 2004-2007, David Dillow
   5  *  Written by David Dillow <dave@thedillows.org>
   6  *  Inspired by the Trident 4D-WaveDX/NX driver.
   7  *
   8  *  All rights reserved.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation, version 2.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/pci.h>
  26 #include <linux/time.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/delay.h>
  30 #include <sound/core.h>
  31 #include <sound/ac97_codec.h>
  32 #include <sound/initval.h>
  33 #include "sis7019.h"
  34
  35 MODULE_AUTHOR("David Dillow <dave@thedillows.org>");
  36 MODULE_DESCRIPTION("SiS7019");
  37 MODULE_LICENSE("GPL");
  38 MODULE_SUPPORTED_DEVICE("{{SiS,SiS7019 Audio Accelerator}}");
  39
  40 static int index = SNDRV_DEFAULT_IDX1;  /* Index 0-MAX */
  41 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  42 static int enable = 1;
  43
  44 module_param(index, int, 0444);
  45 MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
  46 module_param(id, charp, 0444);
  47 MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
  48 module_param(enable, bool, 0444);
  49 MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
  50
  51 static struct pci_device_id snd_sis7019_ids[] = {
  52         { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
  53         { 0, }
  54 };
  55
  56 MODULE_DEVICE_TABLE(pci, snd_sis7019_ids);
  57
  58 /* There are three timing modes for the voices.
  59  *
  60  * For both playback and capture, when the buffer is one or two periods long,
  61  * we use the hardware's built-in Mid-Loop Interrupt and End-Loop Interrupt
  62  * to let us know when the periods have ended.
  63  *
  64  * When performing playback with more than two periods per buffer, we set
  65  * the "Stop Sample Offset" and tell the hardware to interrupt us when we
  66  * reach it. We then update the offset and continue on until we are
  67  * interrupted for the next period.
  68  *
  69  * Capture channels do not have a SSO, so we allocate a playback channel to
  70  * use as a timer for the capture periods. We use the SSO on the playback
  71  * channel to clock out virtual periods, and adjust the virtual period length
  72  * to maintain synchronization. This algorithm came from the Trident driver.
  73  *
  74  * FIXME: It'd be nice to make use of some of the synth features in the
  75  * hardware, but a woeful lack of documentation is a significant roadblock.
  76  */
  77 struct voice {
  78         u16 flags;
  79 #define         VOICE_IN_USE            1
  80 #define         VOICE_CAPTURE           2
  81 #define         VOICE_SSO_TIMING        4
  82 #define         VOICE_SYNC_TIMING       8
  83         u16 sync_cso;
  84         u16 period_size;
  85         u16 buffer_size;
  86         u16 sync_period_size;
  87         u16 sync_buffer_size;
  88         u32 sso;
  89         u32 vperiod;
  90         struct snd_pcm_substream *substream;
  91         struct voice *timing;
  92         void __iomem *ctrl_base;
  93         void __iomem *wave_base;
  94         void __iomem *sync_base;
  95         int num;
  96 };
  97
  98 /* We need four pages to store our wave parameters during a suspend. If
  99  * we're not doing power management, we still need to allocate a page
 100  * for the silence buffer.
 101  */
 102 #ifdef CONFIG_PM
 103 #define SIS_SUSPEND_PAGES       4
 104 #else
 105 #define SIS_SUSPEND_PAGES       1
 106 #endif
 107
 108 struct sis7019 {
 109         unsigned long ioport;
 110         void __iomem *ioaddr;
 111         int irq;
 112         int codecs_present;
 113
 114         struct pci_dev *pci;
 115         struct snd_pcm *pcm;
 116         struct snd_card *card;
 117         struct snd_ac97 *ac97[3];
 118
 119         /* Protect against more than one thread hitting the AC97
 120          * registers (in a more polite manner than pounding the hardware
 121          * semaphore)
 122          */
 123         struct mutex ac97_mutex;
 124
 125         /* voice_lock protects allocation/freeing of the voice descriptions
 126          */
 127         spinlock_t voice_lock;
 128
 129         struct voice voices[64];
 130         struct voice capture_voice;
 131
 132         /* Allocate pages to store the internal wave state during
 133          * suspends. When we're operating, this can be used as a silence
 134          * buffer for a timing channel.
 135          */
 136         void *suspend_state[SIS_SUSPEND_PAGES];
 137
 138         int silence_users;
 139         dma_addr_t silence_dma_addr;
 140 };
 141
 142 #define SIS_PRIMARY_CODEC_PRESENT       0x0001
 143 #define SIS_SECONDARY_CODEC_PRESENT     0x0002
 144 #define SIS_TERTIARY_CODEC_PRESENT      0x0004
 145
 146 /* The HW offset parameters (Loop End, Stop Sample, End Sample) have a
 147  * documented range of 8-0xfff8 samples. Given that they are 0-based,
 148  * that places our period/buffer range at 9-0xfff9 samples. That makes the
 149  * max buffer size 0xfff9 samples * 2 channels * 2 bytes per sample, and
 150  * max samples / min samples gives us the max periods in a buffer.
 151  *
 152  * We'll add a constraint upon open that limits the period and buffer sample
 153  * size to values that are legal for the hardware.
 154  */
 155 static struct snd_pcm_hardware sis_playback_hw_info = {
 156         .info = (SNDRV_PCM_INFO_MMAP |
 157                  SNDRV_PCM_INFO_MMAP_VALID |
 158                  SNDRV_PCM_INFO_INTERLEAVED |
 159                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 160                  SNDRV_PCM_INFO_SYNC_START |
 161                  SNDRV_PCM_INFO_RESUME),
 162         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 163                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 164         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS,
 165         .rate_min = 4000,
 166         .rate_max = 48000,
 167         .channels_min = 1,
 168         .channels_max = 2,
 169         .buffer_bytes_max = (0xfff9 * 4),
 170         .period_bytes_min = 9,
 171         .period_bytes_max = (0xfff9 * 4),
 172         .periods_min = 1,
 173         .periods_max = (0xfff9 / 9),
 174 };
 175
 176 static struct snd_pcm_hardware sis_capture_hw_info = {
 177         .info = (SNDRV_PCM_INFO_MMAP |
 178                  SNDRV_PCM_INFO_MMAP_VALID |
 179                  SNDRV_PCM_INFO_INTERLEAVED |
 180                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 181                  SNDRV_PCM_INFO_SYNC_START |
 182                  SNDRV_PCM_INFO_RESUME),
 183         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 184                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 185         .rates = SNDRV_PCM_RATE_48000,
 186         .rate_min = 4000,
 187         .rate_max = 48000,
 188         .channels_min = 1,
 189         .channels_max = 2,
 190         .buffer_bytes_max = (0xfff9 * 4),
 191         .period_bytes_min = 9,
 192         .period_bytes_max = (0xfff9 * 4),
 193         .periods_min = 1,
 194         .periods_max = (0xfff9 / 9),
 195 };
 196
 197 static void sis_update_sso(struct voice *voice, u16 period)
 198 {
 199         void __iomem *base = voice->ctrl_base;
 200
 201         voice->sso += period;
 202         if (voice->sso >= voice->buffer_size)
 203                 voice->sso -= voice->buffer_size;
 204
 205         /* Enforce the documented hardware minimum offset */
 206         if (voice->sso < 8)
 207                 voice->sso = 8;
 208
 209         /* The SSO is in the upper 16 bits of the register. */
 210         writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);
 211 }
 212
 213 static void sis_update_voice(struct voice *voice)
 214 {
 215         if (voice->flags & VOICE_SSO_TIMING) {
 216                 sis_update_sso(voice, voice->period_size);
 217         } else if (voice->flags & VOICE_SYNC_TIMING) {
 218                 int sync;
 219
 220                 /* If we've not hit the end of the virtual period, update
 221                  * our records and keep going.
 222                  */
 223                 if (voice->vperiod > voice->period_size) {
 224                         voice->vperiod -= voice->period_size;
 225                         if (voice->vperiod < voice->period_size)
 226                                 sis_update_sso(voice, voice->vperiod);
 227                         else
 228                                 sis_update_sso(voice, voice->period_size);
 229                         return;
 230                 }
 231
 232                 /* Calculate our relative offset between the target and
 233                  * the actual CSO value. Since we're operating in a loop,
 234                  * if the value is more than half way around, we can
 235                  * consider ourselves wrapped.
 236                  */
 237                 sync = voice->sync_cso;
 238                 sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 239                 if (sync > (voice->sync_buffer_size / 2))
 240                         sync -= voice->sync_buffer_size;
 241
 242                 /* If sync is positive, then we interrupted too early, and
 243                  * we'll need to come back in a few samples and try again.
 244                  * There's a minimum wait, as it takes some time for the DMA
 245                  * engine to startup, etc...
 246                  */
 247                 if (sync > 0) {
 248                         if (sync < 16)
 249                                 sync = 16;
 250                         sis_update_sso(voice, sync);
 251                         return;
 252                 }
 253
 254                 /* Ok, we interrupted right on time, or (hopefully) just
 255                  * a bit late. We'll adjst our next waiting period based
 256                  * on how close we got.
 257                  *
 258                  * We need to stay just behind the actual channel to ensure
 259                  * it really is past a period when we get our interrupt --
 260                  * otherwise we'll fall into the early code above and have
 261                  * a minimum wait time, which makes us quite late here,
 262                  * eating into the user's time to refresh the buffer, esp.
 263                  * if using small periods.
 264                  *
 265                  * If we're less than 9 samples behind, we're on target.
 266                  */
 267                 if (sync > -9)
 268                         voice->vperiod = voice->sync_period_size + 1;
 269                 else
 270                         voice->vperiod = voice->sync_period_size - 4;
 271
 272                 if (voice->vperiod < voice->buffer_size) {
 273                         sis_update_sso(voice, voice->vperiod);
 274                         voice->vperiod = 0;
 275                 } else
 276                         sis_update_sso(voice, voice->period_size);
 277
 278                 sync = voice->sync_cso + voice->sync_period_size;
 279                 if (sync >= voice->sync_buffer_size)
 280                         sync -= voice->sync_buffer_size;
 281                 voice->sync_cso = sync;
 282         }
 283
 284         snd_pcm_period_elapsed(voice->substream);
 285 }
 286
 287 static void sis_voice_irq(u32 status, struct voice *voice)
 288 {
 289         int bit;
 290
 291         while (status) {
 292                 bit = __ffs(status);
 293                 status >>= bit + 1;
 294                 voice += bit;
 295                 sis_update_voice(voice);
 296                 voice++;
 297         }
 298 }
 299
 300 static irqreturn_t sis_interrupt(int irq, void *dev)
 301 {
 302         struct sis7019 *sis = dev;
 303         unsigned long io = sis->ioport;
 304         struct voice *voice;
 305         u32 intr, status;
 306
 307         /* We only use the DMA interrupts, and we don't enable any other
 308          * source of interrupts. But, it is possible to see an interupt
 309          * status that didn't actually interrupt us, so eliminate anything
 310          * we're not expecting to avoid falsely claiming an IRQ, and an
 311          * ensuing endless loop.
 312          */
 313         intr = inl(io + SIS_GISR);
 314         intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 315                 SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 316         if (!intr)
 317                 return IRQ_NONE;
 318
 319         do {
 320                 status = inl(io + SIS_PISR_A);
 321                 if (status) {
 322                         sis_voice_irq(status, sis->voices);
 323                         outl(status, io + SIS_PISR_A);
 324                 }
 325
 326                 status = inl(io + SIS_PISR_B);
 327                 if (status) {
 328                         sis_voice_irq(status, &sis->voices[32]);
 329                         outl(status, io + SIS_PISR_B);
 330                 }
 331
 332                 status = inl(io + SIS_RISR);
 333                 if (status) {
 334                         voice = &sis->capture_voice;
 335                         if (!voice->timing)
 336                                 snd_pcm_period_elapsed(voice->substream);
 337
 338                         outl(status, io + SIS_RISR);
 339                 }
 340
 341                 outl(intr, io + SIS_GISR);
 342                 intr = inl(io + SIS_GISR);
 343                 intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 344                         SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 345         } while (intr);
 346
 347         return IRQ_HANDLED;
 348 }
 349
 350 static u32 sis_rate_to_delta(unsigned int rate)
 351 {
 352         u32 delta;
 353
 354         /* This was copied from the trident driver, but it seems its gotten
 355          * around a bit... nevertheless, it works well.
 356          *
 357          * We special case 44100 and 8000 since rounding with the equation
 358          * does not give us an accurate enough value. For 11025 and 22050
 359          * the equation gives us the best answer. All other frequencies will
 360          * also use the equation. JDW
 361          */
 362         if (rate == 44100)
 363                 delta = 0xeb3;
 364         else if (rate == 8000)
 365                 delta = 0x2ab;
 366         else if (rate == 48000)
 367                 delta = 0x1000;
 368         else
 369                 delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
 370         return delta;
 371 }
 372
 373 static void __sis_map_silence(struct sis7019 *sis)
 374 {
 375         /* Helper function: must hold sis->voice_lock on entry */
 376         if (!sis->silence_users)
 377                 sis->silence_dma_addr = pci_map_single(sis->pci,
 378                                                 sis->suspend_state[0],
 379                                                 4096, PCI_DMA_TODEVICE);
 380         sis->silence_users++;
 381 }
 382
 383 static void __sis_unmap_silence(struct sis7019 *sis)
 384 {
 385         /* Helper function: must hold sis->voice_lock on entry */
 386         sis->silence_users--;
 387         if (!sis->silence_users)
 388                 pci_unmap_single(sis->pci, sis->silence_dma_addr, 4096,
 389                                         PCI_DMA_TODEVICE);
 390 }
 391
 392 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)
 393 {
 394         unsigned long flags;
 395
 396         spin_lock_irqsave(&sis->voice_lock, flags);
 397         if (voice->timing) {
 398                 __sis_unmap_silence(sis);
 399                 voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |
 400                                                 VOICE_SYNC_TIMING);
 401                 voice->timing = NULL;
 402         }
 403         voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);
 404         spin_unlock_irqrestore(&sis->voice_lock, flags);
 405 }
 406
 407 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)
 408 {
 409         /* Must hold the voice_lock on entry */
 410         struct voice *voice;
 411         int i;
 412
 413         for (i = 0; i < 64; i++) {
 414                 voice = &sis->voices[i];
 415                 if (voice->flags & VOICE_IN_USE)
 416                         continue;
 417                 voice->flags |= VOICE_IN_USE;
 418                 goto found_one;
 419         }
 420         voice = NULL;
 421
 422 found_one:
 423         return voice;
 424 }
 425
 426 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)
 427 {
 428         struct voice *voice;
 429         unsigned long flags;
 430
 431         spin_lock_irqsave(&sis->voice_lock, flags);
 432         voice = __sis_alloc_playback_voice(sis);
 433         spin_unlock_irqrestore(&sis->voice_lock, flags);
 434
 435         return voice;
 436 }
 437
 438 static int sis_alloc_timing_voice(struct snd_pcm_substream *substream,
 439                                         struct snd_pcm_hw_params *hw_params)
 440 {
 441         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 442         struct snd_pcm_runtime *runtime = substream->runtime;
 443         struct voice *voice = runtime->private_data;
 444         unsigned int period_size, buffer_size;
 445         unsigned long flags;
 446         int needed;
 447
 448         /* If there are one or two periods per buffer, we don't need a
 449          * timing voice, as we can use the capture channel's interrupts
 450          * to clock out the periods.
 451          */
 452         period_size = params_period_size(hw_params);
 453         buffer_size = params_buffer_size(hw_params);
 454         needed = (period_size != buffer_size &&
 455                         period_size != (buffer_size / 2));
 456
 457         if (needed && !voice->timing) {
 458                 spin_lock_irqsave(&sis->voice_lock, flags);
 459                 voice->timing = __sis_alloc_playback_voice(sis);
 460                 if (voice->timing)
 461                         __sis_map_silence(sis);
 462                 spin_unlock_irqrestore(&sis->voice_lock, flags);
 463                 if (!voice->timing)
 464                         return -ENOMEM;
 465                 voice->timing->substream = substream;
 466         } else if (!needed && voice->timing) {
 467                 sis_free_voice(sis, voice);
 468                 voice->timing = NULL;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static int sis_playback_open(struct snd_pcm_substream *substream)
 475 {
 476         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 477         struct snd_pcm_runtime *runtime = substream->runtime;
 478         struct voice *voice;
 479
 480         voice = sis_alloc_playback_voice(sis);
 481         if (!voice)
 482                 return -EAGAIN;
 483
 484         voice->substream = substream;
 485         runtime->private_data = voice;
 486         runtime->hw = sis_playback_hw_info;
 487         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 488                                                 9, 0xfff9);
 489         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 490                                                 9, 0xfff9);
 491         snd_pcm_set_sync(substream);
 492         return 0;
 493 }
 494
 495 static int sis_substream_close(struct snd_pcm_substream *substream)
 496 {
 497         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 498         struct snd_pcm_runtime *runtime = substream->runtime;
 499         struct voice *voice = runtime->private_data;
 500
 501         sis_free_voice(sis, voice);
 502         return 0;
 503 }
 504
 505 static int sis_playback_hw_params(struct snd_pcm_substream *substream,
 506                                         struct snd_pcm_hw_params *hw_params)
 507 {
 508         return snd_pcm_lib_malloc_pages(substream,
 509                                         params_buffer_bytes(hw_params));
 510 }
 511
 512 static int sis_hw_free(struct snd_pcm_substream *substream)
 513 {
 514         return snd_pcm_lib_free_pages(substream);
 515 }
 516
 517 static int sis_pcm_playback_prepare(struct snd_pcm_substream *substream)
 518 {
 519         struct snd_pcm_runtime *runtime = substream->runtime;
 520         struct voice *voice = runtime->private_data;
 521         void __iomem *ctrl_base = voice->ctrl_base;
 522         void __iomem *wave_base = voice->wave_base;
 523         u32 format, dma_addr, control, sso_eso, delta, reg;
 524         u16 leo;
 525
 526         /* We rely on the PCM core to ensure that the parameters for this
 527          * substream do not change on us while we're programming the HW.
 528          */
 529         format = 0;
 530         if (snd_pcm_format_width(runtime->format) == 8)
 531                 format |= SIS_PLAY_DMA_FORMAT_8BIT;
 532         if (!snd_pcm_format_signed(runtime->format))
 533                 format |= SIS_PLAY_DMA_FORMAT_UNSIGNED;
 534         if (runtime->channels == 1)
 535                 format |= SIS_PLAY_DMA_FORMAT_MONO;
 536
 537         /* The baseline setup is for a single period per buffer, and
 538          * we add bells and whistles as needed from there.
 539          */
 540         dma_addr = runtime->dma_addr;
 541         leo = runtime->buffer_size - 1;
 542         control = leo | SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_LEO;
 543         sso_eso = leo;
 544
 545         if (runtime->period_size == (runtime->buffer_size / 2)) {
 546                 control |= SIS_PLAY_DMA_INTR_AT_MLP;
 547         } else if (runtime->period_size != runtime->buffer_size) {
 548                 voice->flags |= VOICE_SSO_TIMING;
 549                 voice->sso = runtime->period_size - 1;
 550                 voice->period_size = runtime->period_size;
 551                 voice->buffer_size = runtime->buffer_size;
 552
 553                 control &= ~SIS_PLAY_DMA_INTR_AT_LEO;
 554                 control |= SIS_PLAY_DMA_INTR_AT_SSO;
 555                 sso_eso |= (runtime->period_size - 1) << 16;
 556         }
 557
 558         delta = sis_rate_to_delta(runtime->rate);
 559
 560         /* Ok, we're ready to go, set up the channel.
 561          */
 562         writel(format, ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 563         writel(dma_addr, ctrl_base + SIS_PLAY_DMA_BASE);
 564         writel(control, ctrl_base + SIS_PLAY_DMA_CONTROL);
 565         writel(sso_eso, ctrl_base + SIS_PLAY_DMA_SSO_ESO);
 566
 567         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 568                 writel(0, wave_base + reg);
 569
 570         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 571         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 572         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 573                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 574                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 575                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 576
 577         /* Force PCI writes to post. */
 578         readl(ctrl_base);
 579
 580         return 0;
 581 }
 582
 583 static int sis_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 584 {
 585         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 586         unsigned long io = sis->ioport;
 587         struct snd_pcm_substream *s;
 588         struct voice *voice;
 589         void *chip;
 590         int starting;
 591         u32 record = 0;
 592         u32 play[2] = { 0, 0 };
 593
 594         /* No locks needed, as the PCM core will hold the locks on the
 595          * substreams, and the HW will only start/stop the indicated voices
 596          * without changing the state of the others.
 597          */
 598         switch (cmd) {
 599         case SNDRV_PCM_TRIGGER_START:
 600         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 601         case SNDRV_PCM_TRIGGER_RESUME:
 602                 starting = 1;
 603                 break;
 604         case SNDRV_PCM_TRIGGER_STOP:
 605         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 606         case SNDRV_PCM_TRIGGER_SUSPEND:
 607                 starting = 0;
 608                 break;
 609         default:
 610                 return -EINVAL;
 611         }
 612
 613         snd_pcm_group_for_each_entry(s, substream) {
 614                 /* Make sure it is for us... */
 615                 chip = snd_pcm_substream_chip(s);
 616                 if (chip != sis)
 617                         continue;
 618
 619                 voice = s->runtime->private_data;
 620                 if (voice->flags & VOICE_CAPTURE) {
 621                         record |= 1 << voice->num;
 622                         voice = voice->timing;
 623                 }
 624
 625                 /* voice could be NULL if this a recording stream, and it
 626                  * doesn't have an external timing channel.
 627                  */
 628                 if (voice)
 629                         play[voice->num / 32] |= 1 << (voice->num & 0x1f);
 630
 631                 snd_pcm_trigger_done(s, substream);
 632         }
 633
 634         if (starting) {
 635                 if (record)
 636                         outl(record, io + SIS_RECORD_START_REG);
 637                 if (play[0])
 638                         outl(play[0], io + SIS_PLAY_START_A_REG);
 639                 if (play[1])
 640                         outl(play[1], io + SIS_PLAY_START_B_REG);
 641         } else {
 642                 if (record)
 643                         outl(record, io + SIS_RECORD_STOP_REG);
 644                 if (play[0])
 645                         outl(play[0], io + SIS_PLAY_STOP_A_REG);
 646                 if (play[1])
 647                         outl(play[1], io + SIS_PLAY_STOP_B_REG);
 648         }
 649         return 0;
 650 }
 651
 652 static snd_pcm_uframes_t sis_pcm_pointer(struct snd_pcm_substream *substream)
 653 {
 654         struct snd_pcm_runtime *runtime = substream->runtime;
 655         struct voice *voice = runtime->private_data;
 656         u32 cso;
 657
 658         cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 659         cso &= 0xffff;
 660         return cso;
 661 }
 662
 663 static int sis_capture_open(struct snd_pcm_substream *substream)
 664 {
 665         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 666         struct snd_pcm_runtime *runtime = substream->runtime;
 667         struct voice *voice = &sis->capture_voice;
 668         unsigned long flags;
 669
 670         /* FIXME: The driver only supports recording from one channel
 671          * at the moment, but it could support more.
 672          */
 673         spin_lock_irqsave(&sis->voice_lock, flags);
 674         if (voice->flags & VOICE_IN_USE)
 675                 voice = NULL;
 676         else
 677                 voice->flags |= VOICE_IN_USE;
 678         spin_unlock_irqrestore(&sis->voice_lock, flags);
 679
 680         if (!voice)
 681                 return -EAGAIN;
 682
 683         voice->substream = substream;
 684         runtime->private_data = voice;
 685         runtime->hw = sis_capture_hw_info;
 686         runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
 687         snd_pcm_limit_hw_rates(runtime);
 688         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 689                                                 9, 0xfff9);
 690         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 691                                                 9, 0xfff9);
 692         snd_pcm_set_sync(substream);
 693         return 0;
 694 }
 695
 696 static int sis_capture_hw_params(struct snd_pcm_substream *substream,
 697                                         struct snd_pcm_hw_params *hw_params)
 698 {
 699         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 700         int rc;
 701
 702         rc = snd_ac97_set_rate(sis->ac97[0], AC97_PCM_LR_ADC_RATE,
 703                                                 params_rate(hw_params));
 704         if (rc)
 705                 goto out;
 706
 707         rc = snd_pcm_lib_malloc_pages(substream,
 708                                         params_buffer_bytes(hw_params));
 709         if (rc < 0)
 710                 goto out;
 711
 712         rc = sis_alloc_timing_voice(substream, hw_params);
 713
 714 out:
 715         return rc;
 716 }
 717
 718 static void sis_prepare_timing_voice(struct voice *voice,
 719                                         struct snd_pcm_substream *substream)
 720 {
 721         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 722         struct snd_pcm_runtime *runtime = substream->runtime;
 723         struct voice *timing = voice->timing;
 724         void __iomem *play_base = timing->ctrl_base;
 725         void __iomem *wave_base = timing->wave_base;
 726         u16 buffer_size, period_size;
 727         u32 format, control, sso_eso, delta;
 728         u32 vperiod, sso, reg;
 729
 730         /* Set our initial buffer and period as large as we can given a
 731          * single page of silence.
 732          */
 733         buffer_size = 4096 / runtime->channels;
 734         buffer_size /= snd_pcm_format_size(runtime->format, 1);
 735         period_size = buffer_size;
 736
 737         /* Initially, we want to interrupt just a bit behind the end of
 738          * the period we're clocking out. 10 samples seems to give a good
 739          * delay.
 740          *
 741          * We want to spread our interrupts throughout the virtual period,
 742          * so that we don't end up with two interrupts back to back at the
 743          * end -- this helps minimize the effects of any jitter. Adjust our
 744          * clocking period size so that the last period is at least a fourth
 745          * of a full period.
 746          *
 747          * This is all moot if we don't need to use virtual periods.
 748          */
 749         vperiod = runtime->period_size + 10;
 750         if (vperiod > period_size) {
 751                 u16 tail = vperiod % period_size;
 752                 u16 quarter_period = period_size / 4;
 753
 754                 if (tail && tail < quarter_period) {
 755                         u16 loops = vperiod / period_size;
 756
 757                         tail = quarter_period - tail;
 758                         tail += loops - 1;
 759                         tail /= loops;
 760                         period_size -= tail;
 761                 }
 762
 763                 sso = period_size - 1;
 764         } else {
 765                 /* The initial period will fit inside the buffer, so we
 766                  * don't need to use virtual periods -- disable them.
 767                  */
 768                 period_size = runtime->period_size;
 769                 sso = vperiod - 1;
 770                 vperiod = 0;
 771         }
 772
 773         /* The interrupt handler implements the timing syncronization, so
 774          * setup its state.
 775          */
 776         timing->flags |= VOICE_SYNC_TIMING;
 777         timing->sync_base = voice->ctrl_base;
 778         timing->sync_cso = runtime->period_size - 1;
 779         timing->sync_period_size = runtime->period_size;
 780         timing->sync_buffer_size = runtime->buffer_size;
 781         timing->period_size = period_size;
 782         timing->buffer_size = buffer_size;
 783         timing->sso = sso;
 784         timing->vperiod = vperiod;
 785
 786         /* Using unsigned samples with the all-zero silence buffer
 787          * forces the output to the lower rail, killing playback.
 788          * So ignore unsigned vs signed -- it doesn't change the timing.
 789          */
 790         format = 0;
 791         if (snd_pcm_format_width(runtime->format) == 8)
 792                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 793         if (runtime->channels == 1)
 794                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 795
 796         control = timing->buffer_size - 1;
 797         control |= SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_SSO;
 798         sso_eso = timing->buffer_size - 1;
 799         sso_eso |= timing->sso << 16;
 800
 801         delta = sis_rate_to_delta(runtime->rate);
 802
 803         /* We've done the math, now configure the channel.
 804          */
 805         writel(format, play_base + SIS_PLAY_DMA_FORMAT_CSO);
 806         writel(sis->silence_dma_addr, play_base + SIS_PLAY_DMA_BASE);
 807         writel(control, play_base + SIS_PLAY_DMA_CONTROL);
 808         writel(sso_eso, play_base + SIS_PLAY_DMA_SSO_ESO);
 809
 810         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 811                 writel(0, wave_base + reg);
 812
 813         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 814         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 815         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 816                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 817                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 818                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 819 }
 820
 821 static int sis_pcm_capture_prepare(struct snd_pcm_substream *substream)
 822 {
 823         struct snd_pcm_runtime *runtime = substream->runtime;
 824         struct voice *voice = runtime->private_data;
 825         void __iomem *rec_base = voice->ctrl_base;
 826         u32 format, dma_addr, control;
 827         u16 leo;
 828
 829         /* We rely on the PCM core to ensure that the parameters for this
 830          * substream do not change on us while we're programming the HW.
 831          */
 832         format = 0;
 833         if (snd_pcm_format_width(runtime->format) == 8)
 834                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 835         if (!snd_pcm_format_signed(runtime->format))
 836                 format |= SIS_CAPTURE_DMA_FORMAT_UNSIGNED;
 837         if (runtime->channels == 1)
 838                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 839
 840         dma_addr = runtime->dma_addr;
 841         leo = runtime->buffer_size - 1;
 842         control = leo | SIS_CAPTURE_DMA_LOOP;
 843
 844         /* If we've got more than two periods per buffer, then we have
 845          * use a timing voice to clock out the periods. Otherwise, we can
 846          * use the capture channel's interrupts.
 847          */
 848         if (voice->timing) {
 849                 sis_prepare_timing_voice(voice, substream);
 850         } else {
 851                 control |= SIS_CAPTURE_DMA_INTR_AT_LEO;
 852                 if (runtime->period_size != runtime->buffer_size)
 853                         control |= SIS_CAPTURE_DMA_INTR_AT_MLP;
 854         }
 855
 856         writel(format, rec_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 857         writel(dma_addr, rec_base + SIS_CAPTURE_DMA_BASE);
 858         writel(control, rec_base + SIS_CAPTURE_DMA_CONTROL);
 859
 860         /* Force the writes to post. */
 861         readl(rec_base);
 862
 863         return 0;
 864 }
 865
 866 static struct snd_pcm_ops sis_playback_ops = {
 867         .open = sis_playback_open,
 868         .close = sis_substream_close,
 869         .ioctl = snd_pcm_lib_ioctl,
 870         .hw_params = sis_playback_hw_params,
 871         .hw_free = sis_hw_free,
 872         .prepare = sis_pcm_playback_prepare,
 873         .trigger = sis_pcm_trigger,
 874         .pointer = sis_pcm_pointer,
 875 };
 876
 877 static struct snd_pcm_ops sis_capture_ops = {
 878         .open = sis_capture_open,
 879         .close = sis_substream_close,
 880         .ioctl = snd_pcm_lib_ioctl,
 881         .hw_params = sis_capture_hw_params,
 882         .hw_free = sis_hw_free,
 883         .prepare = sis_pcm_capture_prepare,
 884         .trigger = sis_pcm_trigger,
 885         .pointer = sis_pcm_pointer,
 886 };
 887
 888 static int __devinit sis_pcm_create(struct sis7019 *sis)
 889 {
 890         struct snd_pcm *pcm;
 891         int rc;
 892
 893         /* We have 64 voices, and the driver currently records from
 894          * only one channel, though that could change in the future.
 895          */
 896         rc = snd_pcm_new(sis->card, "SiS7019", 0, 64, 1, &pcm);
 897         if (rc)
 898                 return rc;
 899
 900         pcm->private_data = sis;
 901         strcpy(pcm->name, "SiS7019");
 902         sis->pcm = pcm;
 903
 904         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &sis_playback_ops);
 905         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &sis_capture_ops);
 906
 907         /* Try to preallocate some memory, but it's not the end of the
 908          * world if this fails.
 909          */
 910         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 911                                 snd_dma_pci_data(sis->pci), 64*1024, 128*1024);
 912
 913         return 0;
 914 }
 915
 916 static unsigned short sis_ac97_rw(struct sis7019 *sis, int codec, u32 cmd)
 917 {
 918         unsigned long io = sis->ioport;
 919         unsigned short val = 0xffff;
 920         u16 status;
 921         u16 rdy;
 922         int count;
 923         static const u16 codec_ready[3] = {
 924                 SIS_AC97_STATUS_CODEC_READY,
 925                 SIS_AC97_STATUS_CODEC2_READY,
 926                 SIS_AC97_STATUS_CODEC3_READY,
 927         };
 928
 929         rdy = codec_ready[codec];
 930
 931
 932         /* Get the AC97 semaphore -- software first, so we don't spin
 933          * pounding out IO reads on the hardware semaphore...
 934          */
 935         mutex_lock(&sis->ac97_mutex);
 936
 937         count = 0xffff;
 938         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
 939                 udelay(1);
 940
 941         if (!count)
 942                 goto timeout;
 943
 944         /* ... and wait for any outstanding commands to complete ...
 945          */
 946         count = 0xffff;
 947         do {
 948                 status = inw(io + SIS_AC97_STATUS);
 949                 if ((status & rdy) && !(status & SIS_AC97_STATUS_BUSY))
 950                         break;
 951
 952                 udelay(1);
 953         } while (--count);
 954
 955         if (!count)
 956                 goto timeout_sema;
 957
 958         /* ... before sending our command and waiting for it to finish ...
 959          */
 960         outl(cmd, io + SIS_AC97_CMD);
 961         udelay(10);
 962
 963         count = 0xffff;
 964         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
 965                 udelay(1);
 966
 967         /* ... and reading the results (if any).
 968          */
 969         val = inl(io + SIS_AC97_CMD) >> 16;
 970
 971 timeout_sema:
 972         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
 973 timeout:
 974         mutex_unlock(&sis->ac97_mutex);
 975
 976         if (!count) {
 977                 printk(KERN_ERR "sis7019: ac97 codec %d timeout cmd 0x%08x\n",
 978                                         codec, cmd);
 979         }
 980
 981         return val;
 982 }
 983
 984 static void sis_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 985                                 unsigned short val)
 986 {
 987         static const u32 cmd[3] = {
 988                 SIS_AC97_CMD_CODEC_WRITE,
 989                 SIS_AC97_CMD_CODEC2_WRITE,
 990                 SIS_AC97_CMD_CODEC3_WRITE,
 991         };
 992         sis_ac97_rw(ac97->private_data, ac97->num,
 993                         (val << 16) | (reg << 8) | cmd[ac97->num]);
 994 }
 995
 996 static unsigned short sis_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
 997 {
 998         static const u32 cmd[3] = {
 999                 SIS_AC97_CMD_CODEC_READ,
1000                 SIS_AC97_CMD_CODEC2_READ,
1001                 SIS_AC97_CMD_CODEC3_READ,
1002         };
1003         return sis_ac97_rw(ac97->private_data, ac97->num,
1004                                         (reg << 8) | cmd[ac97->num]);
1005 }
1006
1007 static int __devinit sis_mixer_create(struct sis7019 *sis)
1008 {
1009         struct snd_ac97_bus *bus;
1010         struct snd_ac97_template ac97;
1011         static struct snd_ac97_bus_ops ops = {
1012                 .write = sis_ac97_write,
1013                 .read = sis_ac97_read,
1014         };
1015         int rc;
1016
1017         memset(&ac97, 0, sizeof(ac97));
1018         ac97.private_data = sis;
1019
1020         rc = snd_ac97_bus(sis->card, 0, &ops, NULL, &bus);
1021         if (!rc && sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1022                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[0]);
1023         ac97.num = 1;
1024         if (!rc && (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT))
1025                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[1]);
1026         ac97.num = 2;
1027         if (!rc && (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT))
1028                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[2]);
1029
1030         /* If we return an error here, then snd_card_free() should
1031          * free up any ac97 codecs that got created, as well as the bus.
1032          */
1033         return rc;
1034 }
1035
1036 static void sis_free_suspend(struct sis7019 *sis)
1037 {
1038         int i;
1039
1040         for (i = 0; i < SIS_SUSPEND_PAGES; i++)
1041                 kfree(sis->suspend_state[i]);
1042 }
1043
1044 static int sis_chip_free(struct sis7019 *sis)
1045 {
1046         /* Reset the chip, and disable all interrputs.
1047          */
1048         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
1049         udelay(10);
1050         outl(0, sis->ioport + SIS_GCR);
1051         outl(0, sis->ioport + SIS_GIER);
1052
1053         /* Now, free everything we allocated.
1054          */
1055         if (sis->irq >= 0)
1056                 free_irq(sis->irq, sis);
1057
1058         if (sis->ioaddr)
1059                 iounmap(sis->ioaddr);
1060
1061         pci_release_regions(sis->pci);
1062         pci_disable_device(sis->pci);
1063
1064         sis_free_suspend(sis);
1065         return 0;
1066 }
1067
1068 static int sis_dev_free(struct snd_device *dev)
1069 {
1070         struct sis7019 *sis = dev->device_data;
1071         return sis_chip_free(sis);
1072 }
1073
1074 static int sis_chip_init(struct sis7019 *sis)
1075 {
1076         unsigned long io = sis->ioport;
1077         void __iomem *ioaddr = sis->ioaddr;
1078         u16 status;
1079         int count;
1080         int i;
1081
1082         /* Reset the audio controller
1083          */
1084         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
1085         udelay(10);
1086         outl(0, io + SIS_GCR);
1087
1088         /* Get the AC-link semaphore, and reset the codecs
1089          */
1090         count = 0xffff;
1091         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
1092                 udelay(1);
1093
1094         if (!count)
1095                 return -EIO;
1096
1097         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
1098         udelay(10);
1099
1100         count = 0xffff;
1101         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
1102                 udelay(1);
1103
1104         /* Now that we've finished the reset, find out what's attached.
1105          */
1106         status = inl(io + SIS_AC97_STATUS);
1107         if (status & SIS_AC97_STATUS_CODEC_READY)
1108                 sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
1109         if (status & SIS_AC97_STATUS_CODEC2_READY)
1110                 sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
1111         if (status & SIS_AC97_STATUS_CODEC3_READY)
1112                 sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
1113
1114         /* All done, let go of the semaphore, and check for errors
1115          */
1116         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
1117         if (!sis->codecs_present || !count)
1118                 return -EIO;
1119
1120         /* Let the hardware know that the audio driver is alive,
1121          * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
1122          * record channels. We're going to want to use Variable Rate Audio
1123          * for recording, to avoid needlessly resampling from 48kHZ.
1124          */
1125         outl(SIS_AC97_CONF_AUDIO_ALIVE, io + SIS_AC97_CONF);
1126         outl(SIS_AC97_CONF_AUDIO_ALIVE | SIS_AC97_CONF_PCM_LR_ENABLE |
1127                 SIS_AC97_CONF_PCM_CAP_MIC_ENABLE |
1128                 SIS_AC97_CONF_PCM_CAP_LR_ENABLE |
1129                 SIS_AC97_CONF_CODEC_VRA_ENABLE, io + SIS_AC97_CONF);
1130
1131         /* All AC97 PCM slots should be sourced from sub-mixer 0.
1132          */
1133         outl(0, io + SIS_AC97_PSR);
1134
1135         /* There is only one valid DMA setup for a PCI environment.
1136          */
1137         outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
1138
1139         /* Reset the syncronization groups for all of the channels
1140          * to be asyncronous. If we start doing SPDIF or 5.1 sound, etc.
1141          * we'll need to change how we handle these. Until then, we just
1142          * assign sub-mixer 0 to all playback channels, and avoid any
1143          * attenuation on the audio.
1144          */
1145         outl(0, io + SIS_PLAY_SYNC_GROUP_A);
1146         outl(0, io + SIS_PLAY_SYNC_GROUP_B);
1147         outl(0, io + SIS_PLAY_SYNC_GROUP_C);
1148         outl(0, io + SIS_PLAY_SYNC_GROUP_D);
1149         outl(0, io + SIS_MIXER_SYNC_GROUP);
1150
1151         for (i = 0; i < 64; i++) {
1152                 writel(i, SIS_MIXER_START_ADDR(ioaddr, i));
1153                 writel(SIS_MIXER_RIGHT_NO_ATTEN | SIS_MIXER_LEFT_NO_ATTEN |
1154                                 SIS_MIXER_DEST_0, SIS_MIXER_ADDR(ioaddr, i));
1155         }
1156
1157         /* Don't attenuate any audio set for the wave amplifier.
1158          *
1159          * FIXME: Maximum attenuation is set for the music amp, which will
1160          * need to change if we start using the synth engine.
1161          */
1162         outl(0xffff0000, io + SIS_WEVCR);
1163
1164         /* Ensure that the wave engine is in normal operating mode.
1165          */
1166         outl(0, io + SIS_WECCR);
1167
1168         /* Go ahead and enable the DMA interrupts. They won't go live
1169          * until we start a channel.
1170          */
1171         outl(SIS_GIER_AUDIO_PLAY_DMA_IRQ_ENABLE |
1172                 SIS_GIER_AUDIO_RECORD_DMA_IRQ_ENABLE, io + SIS_GIER);
1173
1174         return 0;
1175 }
1176
1177 #ifdef CONFIG_PM
1178 static int sis_suspend(struct pci_dev *pci, pm_message_t state)
1179 {
1180         struct snd_card *card = pci_get_drvdata(pci);
1181         struct sis7019 *sis = card->private_data;
1182         void __iomem *ioaddr = sis->ioaddr;
1183         int i;
1184
1185         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1186         snd_pcm_suspend_all(sis->pcm);
1187         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1188                 snd_ac97_suspend(sis->ac97[0]);
1189         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1190                 snd_ac97_suspend(sis->ac97[1]);
1191         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1192                 snd_ac97_suspend(sis->ac97[2]);
1193
1194         /* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
1195          */
1196         if (sis->irq >= 0) {
1197                 free_irq(sis->irq, sis);
1198                 sis->irq = -1;
1199         }
1200
1201         /* Save the internal state away
1202          */
1203         for (i = 0; i < 4; i++) {
1204                 memcpy_fromio(sis->suspend_state[i], ioaddr, 4096);
1205                 ioaddr += 4096;
1206         }
1207
1208         pci_disable_device(pci);
1209         pci_save_state(pci);
1210         pci_set_power_state(pci, pci_choose_state(pci, state));
1211         return 0;
1212 }
1213
1214 static int sis_resume(struct pci_dev *pci)
1215 {
1216         struct snd_card *card = pci_get_drvdata(pci);
1217         struct sis7019 *sis = card->private_data;
1218         void __iomem *ioaddr = sis->ioaddr;
1219         int i;
1220
1221         pci_set_power_state(pci, PCI_D0);
1222         pci_restore_state(pci);
1223
1224         if (pci_enable_device(pci) < 0) {
1225                 printk(KERN_ERR "sis7019: unable to re-enable device\n");
1226                 goto error;
1227         }
1228
1229         if (sis_chip_init(sis)) {
1230                 printk(KERN_ERR "sis7019: unable to re-init controller\n");
1231                 goto error;
1232         }
1233
1234         if (request_irq(pci->irq, sis_interrupt, IRQF_DISABLED|IRQF_SHARED,
1235                                 card->shortname, sis)) {
1236                 printk(KERN_ERR "sis7019: unable to regain IRQ %d\n", pci->irq);
1237                 goto error;
1238         }
1239
1240         /* Restore saved state, then clear out the page we use for the
1241          * silence buffer.
1242          */
1243         for (i = 0; i < 4; i++) {
1244                 memcpy_toio(ioaddr, sis->suspend_state[i], 4096);
1245                 ioaddr += 4096;
1246         }
1247
1248         memset(sis->suspend_state[0], 0, 4096);
1249
1250         sis->irq = pci->irq;
1251         pci_set_master(pci);
1252
1253         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1254                 snd_ac97_resume(sis->ac97[0]);
1255         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1256                 snd_ac97_resume(sis->ac97[1]);
1257         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1258                 snd_ac97_resume(sis->ac97[2]);
1259
1260         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1261         return 0;
1262
1263 error:
1264         snd_card_disconnect(card);
1265         return -EIO;
1266 }
1267 #endif /* CONFIG_PM */
1268
1269 static int sis_alloc_suspend(struct sis7019 *sis)
1270 {
1271         int i;
1272
1273         /* We need 16K to store the internal wave engine state during a
1274          * suspend, but we don't need it to be contiguous, so play nice
1275          * with the memory system. We'll also use this area for a silence
1276          * buffer.
1277          */
1278         for (i = 0; i < SIS_SUSPEND_PAGES; i++) {
1279                 sis->suspend_state[i] = kmalloc(4096, GFP_KERNEL);
1280                 if (!sis->suspend_state[i])
1281                         return -ENOMEM;
1282         }
1283         memset(sis->suspend_state[0], 0, 4096);
1284
1285         return 0;
1286 }
1287
1288 static int __devinit sis_chip_create(struct snd_card *card,
1289                                         struct pci_dev *pci)
1290 {
1291         struct sis7019 *sis = card->private_data;
1292         struct voice *voice;
1293         static struct snd_device_ops ops = {
1294                 .dev_free = sis_dev_free,
1295         };
1296         int rc;
1297         int i;
1298
1299         rc = pci_enable_device(pci);
1300         if (rc)
1301                 goto error_out;
1302
1303         if (pci_set_dma_mask(pci, DMA_BIT_MASK(30)) < 0) {
1304                 printk(KERN_ERR "sis7019: architecture does not support "
1305                                         "30-bit PCI busmaster DMA");
1306                 goto error_out_enabled;
1307         }
1308
1309         memset(sis, 0, sizeof(*sis));
1310         mutex_init(&sis->ac97_mutex);
1311         spin_lock_init(&sis->voice_lock);
1312         sis->card = card;
1313         sis->pci = pci;
1314         sis->irq = -1;
1315         sis->ioport = pci_resource_start(pci, 0);
1316
1317         rc = pci_request_regions(pci, "SiS7019");
1318         if (rc) {
1319                 printk(KERN_ERR "sis7019: unable request regions\n");
1320                 goto error_out_enabled;
1321         }
1322
1323         rc = -EIO;
1324         sis->ioaddr = ioremap_nocache(pci_resource_start(pci, 1), 0x4000);
1325         if (!sis->ioaddr) {
1326                 printk(KERN_ERR "sis7019: unable to remap MMIO, aborting\n");
1327                 goto error_out_cleanup;
1328         }
1329
1330         rc = sis_alloc_suspend(sis);
1331         if (rc < 0) {
1332                 printk(KERN_ERR "sis7019: unable to allocate state storage\n");
1333                 goto error_out_cleanup;
1334         }
1335
1336         rc = sis_chip_init(sis);
1337         if (rc)
1338                 goto error_out_cleanup;
1339
1340         if (request_irq(pci->irq, sis_interrupt, IRQF_DISABLED|IRQF_SHARED,
1341                                 card->shortname, sis)) {
1342                 printk(KERN_ERR "unable to allocate irq %d\n", sis->irq);
1343                 goto error_out_cleanup;
1344         }
1345
1346         sis->irq = pci->irq;
1347         pci_set_master(pci);
1348
1349         for (i = 0; i < 64; i++) {
1350                 voice = &sis->voices[i];
1351                 voice->num = i;
1352                 voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);
1353                 voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);
1354         }
1355
1356         voice = &sis->capture_voice;
1357         voice->flags = VOICE_CAPTURE;
1358         voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;
1359         voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);
1360
1361         rc = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sis, &ops);
1362         if (rc)
1363                 goto error_out_cleanup;
1364
1365         snd_card_set_dev(card, &pci->dev);
1366
1367         return 0;
1368
1369 error_out_cleanup:
1370         sis_chip_free(sis);
1371
1372 error_out_enabled:
1373         pci_disable_device(pci);
1374
1375 error_out:
1376         return rc;
1377 }
1378
1379 static int __devinit snd_sis7019_probe(struct pci_dev *pci,
1380                                         const struct pci_device_id *pci_id)
1381 {
1382         struct snd_card *card;
1383         struct sis7019 *sis;
1384         int rc;
1385
1386         rc = -ENOENT;
1387         if (!enable)
1388                 goto error_out;
1389
1390         rc = snd_card_create(index, id, THIS_MODULE, sizeof(*sis), &card);
1391         if (rc < 0)
1392                 goto error_out;
1393
1394         strcpy(card->driver, "SiS7019");
1395         strcpy(card->shortname, "SiS7019");
1396         rc = sis_chip_create(card, pci);
1397         if (rc)
1398                 goto card_error_out;
1399
1400         sis = card->private_data;
1401
1402         rc = sis_mixer_create(sis);
1403         if (rc)
1404                 goto card_error_out;
1405
1406         rc = sis_pcm_create(sis);
1407         if (rc)
1408                 goto card_error_out;
1409
1410         snprintf(card->longname, sizeof(card->longname),
1411                         "%s Audio Accelerator with %s at 0x%lx, irq %d",
1412                         card->shortname, snd_ac97_get_short_name(sis->ac97[0]),
1413                         sis->ioport, sis->irq);
1414
1415         rc = snd_card_register(card);
1416         if (rc)
1417                 goto card_error_out;
1418
1419         pci_set_drvdata(pci, card);
1420         return 0;
1421
1422 card_error_out:
1423         snd_card_free(card);
1424
1425 error_out:
1426         return rc;
1427 }
1428
1429 static void __devexit snd_sis7019_remove(struct pci_dev *pci)
1430 {
1431         snd_card_free(pci_get_drvdata(pci));
1432         pci_set_drvdata(pci, NULL);
1433 }
1434
1435 static struct pci_driver sis7019_driver = {
1436         .name = "SiS7019",
1437         .id_table = snd_sis7019_ids,
1438         .probe = snd_sis7019_probe,
1439         .remove = __devexit_p(snd_sis7019_remove),
1440
1441 #ifdef CONFIG_PM
1442         .suspend = sis_suspend,
1443         .resume = sis_resume,
1444 #endif
1445 };
1446
1447 static int __init sis7019_init(void)
1448 {
1449         return pci_register_driver(&sis7019_driver);
1450 }
1451
1452 static void __exit sis7019_exit(void)
1453 {
1454         pci_unregister_driver(&sis7019_driver);
1455 }
1456
1457 module_init(sis7019_init);
1458 module_exit(sis7019_exit);