sound/pci/sis7019.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Driver for SiS7019 Audio Accelerator
   4  *
   5  *  Copyright (C) 2004-2007, David Dillow
   6  *  Written by David Dillow <dave@thedillows.org>
   7  *  Inspired by the Trident 4D-WaveDX/NX driver.
   8  *
   9  *  All rights reserved.
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/pci.h>
  14 #include <linux/time.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/delay.h>
  19 #include <sound/core.h>
  20 #include <sound/ac97_codec.h>
  21 #include <sound/initval.h>
  22 #include "sis7019.h"
  23
  24 MODULE_AUTHOR("David Dillow <dave@thedillows.org>");
  25 MODULE_DESCRIPTION("SiS7019");
  26 MODULE_LICENSE("GPL");
  27
  28 static int index = SNDRV_DEFAULT_IDX1;  /* Index 0-MAX */
  29 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  30 static bool enable = 1;
  31 static int codecs = 1;
  32
  33 module_param(index, int, 0444);
  34 MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
  35 module_param(id, charp, 0444);
  36 MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
  37 module_param(enable, bool, 0444);
  38 MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
  39 module_param(codecs, int, 0444);
  40 MODULE_PARM_DESC(codecs, "Set bit to indicate that codec number is expected to be present (default 1)");
  41
  42 static const struct pci_device_id snd_sis7019_ids[] = {
  43         { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
  44         { 0, }
  45 };
  46
  47 MODULE_DEVICE_TABLE(pci, snd_sis7019_ids);
  48
  49 /* There are three timing modes for the voices.
  50  *
  51  * For both playback and capture, when the buffer is one or two periods long,
  52  * we use the hardware's built-in Mid-Loop Interrupt and End-Loop Interrupt
  53  * to let us know when the periods have ended.
  54  *
  55  * When performing playback with more than two periods per buffer, we set
  56  * the "Stop Sample Offset" and tell the hardware to interrupt us when we
  57  * reach it. We then update the offset and continue on until we are
  58  * interrupted for the next period.
  59  *
  60  * Capture channels do not have a SSO, so we allocate a playback channel to
  61  * use as a timer for the capture periods. We use the SSO on the playback
  62  * channel to clock out virtual periods, and adjust the virtual period length
  63  * to maintain synchronization. This algorithm came from the Trident driver.
  64  *
  65  * FIXME: It'd be nice to make use of some of the synth features in the
  66  * hardware, but a woeful lack of documentation is a significant roadblock.
  67  */
  68 struct voice {
  69         u16 flags;
  70 #define         VOICE_IN_USE            1
  71 #define         VOICE_CAPTURE           2
  72 #define         VOICE_SSO_TIMING        4
  73 #define         VOICE_SYNC_TIMING       8
  74         u16 sync_cso;
  75         u16 period_size;
  76         u16 buffer_size;
  77         u16 sync_period_size;
  78         u16 sync_buffer_size;
  79         u32 sso;
  80         u32 vperiod;
  81         struct snd_pcm_substream *substream;
  82         struct voice *timing;
  83         void __iomem *ctrl_base;
  84         void __iomem *wave_base;
  85         void __iomem *sync_base;
  86         int num;
  87 };
  88
  89 /* We need four pages to store our wave parameters during a suspend. If
  90  * we're not doing power management, we still need to allocate a page
  91  * for the silence buffer.
  92  */
  93 #ifdef CONFIG_PM_SLEEP
  94 #define SIS_SUSPEND_PAGES       4
  95 #else
  96 #define SIS_SUSPEND_PAGES       1
  97 #endif
  98
  99 struct sis7019 {
 100         unsigned long ioport;
 101         void __iomem *ioaddr;
 102         int irq;
 103         int codecs_present;
 104
 105         struct pci_dev *pci;
 106         struct snd_pcm *pcm;
 107         struct snd_card *card;
 108         struct snd_ac97 *ac97[3];
 109
 110         /* Protect against more than one thread hitting the AC97
 111          * registers (in a more polite manner than pounding the hardware
 112          * semaphore)
 113          */
 114         struct mutex ac97_mutex;
 115
 116         /* voice_lock protects allocation/freeing of the voice descriptions
 117          */
 118         spinlock_t voice_lock;
 119
 120         struct voice voices[64];
 121         struct voice capture_voice;
 122
 123         /* Allocate pages to store the internal wave state during
 124          * suspends. When we're operating, this can be used as a silence
 125          * buffer for a timing channel.
 126          */
 127         void *suspend_state[SIS_SUSPEND_PAGES];
 128
 129         int silence_users;
 130         dma_addr_t silence_dma_addr;
 131 };
 132
 133 /* These values are also used by the module param 'codecs' to indicate
 134  * which codecs should be present.
 135  */
 136 #define SIS_PRIMARY_CODEC_PRESENT       0x0001
 137 #define SIS_SECONDARY_CODEC_PRESENT     0x0002
 138 #define SIS_TERTIARY_CODEC_PRESENT      0x0004
 139
 140 /* The HW offset parameters (Loop End, Stop Sample, End Sample) have a
 141  * documented range of 8-0xfff8 samples. Given that they are 0-based,
 142  * that places our period/buffer range at 9-0xfff9 samples. That makes the
 143  * max buffer size 0xfff9 samples * 2 channels * 2 bytes per sample, and
 144  * max samples / min samples gives us the max periods in a buffer.
 145  *
 146  * We'll add a constraint upon open that limits the period and buffer sample
 147  * size to values that are legal for the hardware.
 148  */
 149 static const struct snd_pcm_hardware sis_playback_hw_info = {
 150         .info = (SNDRV_PCM_INFO_MMAP |
 151                  SNDRV_PCM_INFO_MMAP_VALID |
 152                  SNDRV_PCM_INFO_INTERLEAVED |
 153                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 154                  SNDRV_PCM_INFO_SYNC_START |
 155                  SNDRV_PCM_INFO_RESUME),
 156         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 157                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 158         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS,
 159         .rate_min = 4000,
 160         .rate_max = 48000,
 161         .channels_min = 1,
 162         .channels_max = 2,
 163         .buffer_bytes_max = (0xfff9 * 4),
 164         .period_bytes_min = 9,
 165         .period_bytes_max = (0xfff9 * 4),
 166         .periods_min = 1,
 167         .periods_max = (0xfff9 / 9),
 168 };
 169
 170 static const struct snd_pcm_hardware sis_capture_hw_info = {
 171         .info = (SNDRV_PCM_INFO_MMAP |
 172                  SNDRV_PCM_INFO_MMAP_VALID |
 173                  SNDRV_PCM_INFO_INTERLEAVED |
 174                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 175                  SNDRV_PCM_INFO_SYNC_START |
 176                  SNDRV_PCM_INFO_RESUME),
 177         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 178                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 179         .rates = SNDRV_PCM_RATE_48000,
 180         .rate_min = 4000,
 181         .rate_max = 48000,
 182         .channels_min = 1,
 183         .channels_max = 2,
 184         .buffer_bytes_max = (0xfff9 * 4),
 185         .period_bytes_min = 9,
 186         .period_bytes_max = (0xfff9 * 4),
 187         .periods_min = 1,
 188         .periods_max = (0xfff9 / 9),
 189 };
 190
 191 static void sis_update_sso(struct voice *voice, u16 period)
 192 {
 193         void __iomem *base = voice->ctrl_base;
 194
 195         voice->sso += period;
 196         if (voice->sso >= voice->buffer_size)
 197                 voice->sso -= voice->buffer_size;
 198
 199         /* Enforce the documented hardware minimum offset */
 200         if (voice->sso < 8)
 201                 voice->sso = 8;
 202
 203         /* The SSO is in the upper 16 bits of the register. */
 204         writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);
 205 }
 206
 207 static void sis_update_voice(struct voice *voice)
 208 {
 209         if (voice->flags & VOICE_SSO_TIMING) {
 210                 sis_update_sso(voice, voice->period_size);
 211         } else if (voice->flags & VOICE_SYNC_TIMING) {
 212                 int sync;
 213
 214                 /* If we've not hit the end of the virtual period, update
 215                  * our records and keep going.
 216                  */
 217                 if (voice->vperiod > voice->period_size) {
 218                         voice->vperiod -= voice->period_size;
 219                         if (voice->vperiod < voice->period_size)
 220                                 sis_update_sso(voice, voice->vperiod);
 221                         else
 222                                 sis_update_sso(voice, voice->period_size);
 223                         return;
 224                 }
 225
 226                 /* Calculate our relative offset between the target and
 227                  * the actual CSO value. Since we're operating in a loop,
 228                  * if the value is more than half way around, we can
 229                  * consider ourselves wrapped.
 230                  */
 231                 sync = voice->sync_cso;
 232                 sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 233                 if (sync > (voice->sync_buffer_size / 2))
 234                         sync -= voice->sync_buffer_size;
 235
 236                 /* If sync is positive, then we interrupted too early, and
 237                  * we'll need to come back in a few samples and try again.
 238                  * There's a minimum wait, as it takes some time for the DMA
 239                  * engine to startup, etc...
 240                  */
 241                 if (sync > 0) {
 242                         if (sync < 16)
 243                                 sync = 16;
 244                         sis_update_sso(voice, sync);
 245                         return;
 246                 }
 247
 248                 /* Ok, we interrupted right on time, or (hopefully) just
 249                  * a bit late. We'll adjst our next waiting period based
 250                  * on how close we got.
 251                  *
 252                  * We need to stay just behind the actual channel to ensure
 253                  * it really is past a period when we get our interrupt --
 254                  * otherwise we'll fall into the early code above and have
 255                  * a minimum wait time, which makes us quite late here,
 256                  * eating into the user's time to refresh the buffer, esp.
 257                  * if using small periods.
 258                  *
 259                  * If we're less than 9 samples behind, we're on target.
 260                  * Otherwise, shorten the next vperiod by the amount we've
 261                  * been delayed.
 262                  */
 263                 if (sync > -9)
 264                         voice->vperiod = voice->sync_period_size + 1;
 265                 else
 266                         voice->vperiod = voice->sync_period_size + sync + 10;
 267
 268                 if (voice->vperiod < voice->buffer_size) {
 269                         sis_update_sso(voice, voice->vperiod);
 270                         voice->vperiod = 0;
 271                 } else
 272                         sis_update_sso(voice, voice->period_size);
 273
 274                 sync = voice->sync_cso + voice->sync_period_size;
 275                 if (sync >= voice->sync_buffer_size)
 276                         sync -= voice->sync_buffer_size;
 277                 voice->sync_cso = sync;
 278         }
 279
 280         snd_pcm_period_elapsed(voice->substream);
 281 }
 282
 283 static void sis_voice_irq(u32 status, struct voice *voice)
 284 {
 285         int bit;
 286
 287         while (status) {
 288                 bit = __ffs(status);
 289                 status >>= bit + 1;
 290                 voice += bit;
 291                 sis_update_voice(voice);
 292                 voice++;
 293         }
 294 }
 295
 296 static irqreturn_t sis_interrupt(int irq, void *dev)
 297 {
 298         struct sis7019 *sis = dev;
 299         unsigned long io = sis->ioport;
 300         struct voice *voice;
 301         u32 intr, status;
 302
 303         /* We only use the DMA interrupts, and we don't enable any other
 304          * source of interrupts. But, it is possible to see an interrupt
 305          * status that didn't actually interrupt us, so eliminate anything
 306          * we're not expecting to avoid falsely claiming an IRQ, and an
 307          * ensuing endless loop.
 308          */
 309         intr = inl(io + SIS_GISR);
 310         intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 311                 SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 312         if (!intr)
 313                 return IRQ_NONE;
 314
 315         do {
 316                 status = inl(io + SIS_PISR_A);
 317                 if (status) {
 318                         sis_voice_irq(status, sis->voices);
 319                         outl(status, io + SIS_PISR_A);
 320                 }
 321
 322                 status = inl(io + SIS_PISR_B);
 323                 if (status) {
 324                         sis_voice_irq(status, &sis->voices[32]);
 325                         outl(status, io + SIS_PISR_B);
 326                 }
 327
 328                 status = inl(io + SIS_RISR);
 329                 if (status) {
 330                         voice = &sis->capture_voice;
 331                         if (!voice->timing)
 332                                 snd_pcm_period_elapsed(voice->substream);
 333
 334                         outl(status, io + SIS_RISR);
 335                 }
 336
 337                 outl(intr, io + SIS_GISR);
 338                 intr = inl(io + SIS_GISR);
 339                 intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 340                         SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 341         } while (intr);
 342
 343         return IRQ_HANDLED;
 344 }
 345
 346 static u32 sis_rate_to_delta(unsigned int rate)
 347 {
 348         u32 delta;
 349
 350         /* This was copied from the trident driver, but it seems its gotten
 351          * around a bit... nevertheless, it works well.
 352          *
 353          * We special case 44100 and 8000 since rounding with the equation
 354          * does not give us an accurate enough value. For 11025 and 22050
 355          * the equation gives us the best answer. All other frequencies will
 356          * also use the equation. JDW
 357          */
 358         if (rate == 44100)
 359                 delta = 0xeb3;
 360         else if (rate == 8000)
 361                 delta = 0x2ab;
 362         else if (rate == 48000)
 363                 delta = 0x1000;
 364         else
 365                 delta = DIV_ROUND_CLOSEST(rate << 12, 48000) & 0x0000ffff;
 366         return delta;
 367 }
 368
 369 static void __sis_map_silence(struct sis7019 *sis)
 370 {
 371         /* Helper function: must hold sis->voice_lock on entry */
 372         if (!sis->silence_users)
 373                 sis->silence_dma_addr = dma_map_single(&sis->pci->dev,
 374                                                 sis->suspend_state[0],
 375                                                 4096, DMA_TO_DEVICE);
 376         sis->silence_users++;
 377 }
 378
 379 static void __sis_unmap_silence(struct sis7019 *sis)
 380 {
 381         /* Helper function: must hold sis->voice_lock on entry */
 382         sis->silence_users--;
 383         if (!sis->silence_users)
 384                 dma_unmap_single(&sis->pci->dev, sis->silence_dma_addr, 4096,
 385                                         DMA_TO_DEVICE);
 386 }
 387
 388 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)
 389 {
 390         unsigned long flags;
 391
 392         spin_lock_irqsave(&sis->voice_lock, flags);
 393         if (voice->timing) {
 394                 __sis_unmap_silence(sis);
 395                 voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |
 396                                                 VOICE_SYNC_TIMING);
 397                 voice->timing = NULL;
 398         }
 399         voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);
 400         spin_unlock_irqrestore(&sis->voice_lock, flags);
 401 }
 402
 403 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)
 404 {
 405         /* Must hold the voice_lock on entry */
 406         struct voice *voice;
 407         int i;
 408
 409         for (i = 0; i < 64; i++) {
 410                 voice = &sis->voices[i];
 411                 if (voice->flags & VOICE_IN_USE)
 412                         continue;
 413                 voice->flags |= VOICE_IN_USE;
 414                 goto found_one;
 415         }
 416         voice = NULL;
 417
 418 found_one:
 419         return voice;
 420 }
 421
 422 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)
 423 {
 424         struct voice *voice;
 425         unsigned long flags;
 426
 427         spin_lock_irqsave(&sis->voice_lock, flags);
 428         voice = __sis_alloc_playback_voice(sis);
 429         spin_unlock_irqrestore(&sis->voice_lock, flags);
 430
 431         return voice;
 432 }
 433
 434 static int sis_alloc_timing_voice(struct snd_pcm_substream *substream,
 435                                         struct snd_pcm_hw_params *hw_params)
 436 {
 437         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 438         struct snd_pcm_runtime *runtime = substream->runtime;
 439         struct voice *voice = runtime->private_data;
 440         unsigned int period_size, buffer_size;
 441         unsigned long flags;
 442         int needed;
 443
 444         /* If there are one or two periods per buffer, we don't need a
 445          * timing voice, as we can use the capture channel's interrupts
 446          * to clock out the periods.
 447          */
 448         period_size = params_period_size(hw_params);
 449         buffer_size = params_buffer_size(hw_params);
 450         needed = (period_size != buffer_size &&
 451                         period_size != (buffer_size / 2));
 452
 453         if (needed && !voice->timing) {
 454                 spin_lock_irqsave(&sis->voice_lock, flags);
 455                 voice->timing = __sis_alloc_playback_voice(sis);
 456                 if (voice->timing)
 457                         __sis_map_silence(sis);
 458                 spin_unlock_irqrestore(&sis->voice_lock, flags);
 459                 if (!voice->timing)
 460                         return -ENOMEM;
 461                 voice->timing->substream = substream;
 462         } else if (!needed && voice->timing) {
 463                 sis_free_voice(sis, voice);
 464                 voice->timing = NULL;
 465         }
 466
 467         return 0;
 468 }
 469
 470 static int sis_playback_open(struct snd_pcm_substream *substream)
 471 {
 472         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 473         struct snd_pcm_runtime *runtime = substream->runtime;
 474         struct voice *voice;
 475
 476         voice = sis_alloc_playback_voice(sis);
 477         if (!voice)
 478                 return -EAGAIN;
 479
 480         voice->substream = substream;
 481         runtime->private_data = voice;
 482         runtime->hw = sis_playback_hw_info;
 483         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 484                                                 9, 0xfff9);
 485         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 486                                                 9, 0xfff9);
 487         snd_pcm_set_sync(substream);
 488         return 0;
 489 }
 490
 491 static int sis_substream_close(struct snd_pcm_substream *substream)
 492 {
 493         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 494         struct snd_pcm_runtime *runtime = substream->runtime;
 495         struct voice *voice = runtime->private_data;
 496
 497         sis_free_voice(sis, voice);
 498         return 0;
 499 }
 500
 501 static int sis_pcm_playback_prepare(struct snd_pcm_substream *substream)
 502 {
 503         struct snd_pcm_runtime *runtime = substream->runtime;
 504         struct voice *voice = runtime->private_data;
 505         void __iomem *ctrl_base = voice->ctrl_base;
 506         void __iomem *wave_base = voice->wave_base;
 507         u32 format, dma_addr, control, sso_eso, delta, reg;
 508         u16 leo;
 509
 510         /* We rely on the PCM core to ensure that the parameters for this
 511          * substream do not change on us while we're programming the HW.
 512          */
 513         format = 0;
 514         if (snd_pcm_format_width(runtime->format) == 8)
 515                 format |= SIS_PLAY_DMA_FORMAT_8BIT;
 516         if (!snd_pcm_format_signed(runtime->format))
 517                 format |= SIS_PLAY_DMA_FORMAT_UNSIGNED;
 518         if (runtime->channels == 1)
 519                 format |= SIS_PLAY_DMA_FORMAT_MONO;
 520
 521         /* The baseline setup is for a single period per buffer, and
 522          * we add bells and whistles as needed from there.
 523          */
 524         dma_addr = runtime->dma_addr;
 525         leo = runtime->buffer_size - 1;
 526         control = leo | SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_LEO;
 527         sso_eso = leo;
 528
 529         if (runtime->period_size == (runtime->buffer_size / 2)) {
 530                 control |= SIS_PLAY_DMA_INTR_AT_MLP;
 531         } else if (runtime->period_size != runtime->buffer_size) {
 532                 voice->flags |= VOICE_SSO_TIMING;
 533                 voice->sso = runtime->period_size - 1;
 534                 voice->period_size = runtime->period_size;
 535                 voice->buffer_size = runtime->buffer_size;
 536
 537                 control &= ~SIS_PLAY_DMA_INTR_AT_LEO;
 538                 control |= SIS_PLAY_DMA_INTR_AT_SSO;
 539                 sso_eso |= (runtime->period_size - 1) << 16;
 540         }
 541
 542         delta = sis_rate_to_delta(runtime->rate);
 543
 544         /* Ok, we're ready to go, set up the channel.
 545          */
 546         writel(format, ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 547         writel(dma_addr, ctrl_base + SIS_PLAY_DMA_BASE);
 548         writel(control, ctrl_base + SIS_PLAY_DMA_CONTROL);
 549         writel(sso_eso, ctrl_base + SIS_PLAY_DMA_SSO_ESO);
 550
 551         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 552                 writel(0, wave_base + reg);
 553
 554         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 555         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 556         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 557                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 558                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 559                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 560
 561         /* Force PCI writes to post. */
 562         readl(ctrl_base);
 563
 564         return 0;
 565 }
 566
 567 static int sis_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 568 {
 569         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 570         unsigned long io = sis->ioport;
 571         struct snd_pcm_substream *s;
 572         struct voice *voice;
 573         void *chip;
 574         int starting;
 575         u32 record = 0;
 576         u32 play[2] = { 0, 0 };
 577
 578         /* No locks needed, as the PCM core will hold the locks on the
 579          * substreams, and the HW will only start/stop the indicated voices
 580          * without changing the state of the others.
 581          */
 582         switch (cmd) {
 583         case SNDRV_PCM_TRIGGER_START:
 584         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 585         case SNDRV_PCM_TRIGGER_RESUME:
 586                 starting = 1;
 587                 break;
 588         case SNDRV_PCM_TRIGGER_STOP:
 589         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 590         case SNDRV_PCM_TRIGGER_SUSPEND:
 591                 starting = 0;
 592                 break;
 593         default:
 594                 return -EINVAL;
 595         }
 596
 597         snd_pcm_group_for_each_entry(s, substream) {
 598                 /* Make sure it is for us... */
 599                 chip = snd_pcm_substream_chip(s);
 600                 if (chip != sis)
 601                         continue;
 602
 603                 voice = s->runtime->private_data;
 604                 if (voice->flags & VOICE_CAPTURE) {
 605                         record |= 1 << voice->num;
 606                         voice = voice->timing;
 607                 }
 608
 609                 /* voice could be NULL if this a recording stream, and it
 610                  * doesn't have an external timing channel.
 611                  */
 612                 if (voice)
 613                         play[voice->num / 32] |= 1 << (voice->num & 0x1f);
 614
 615                 snd_pcm_trigger_done(s, substream);
 616         }
 617
 618         if (starting) {
 619                 if (record)
 620                         outl(record, io + SIS_RECORD_START_REG);
 621                 if (play[0])
 622                         outl(play[0], io + SIS_PLAY_START_A_REG);
 623                 if (play[1])
 624                         outl(play[1], io + SIS_PLAY_START_B_REG);
 625         } else {
 626                 if (record)
 627                         outl(record, io + SIS_RECORD_STOP_REG);
 628                 if (play[0])
 629                         outl(play[0], io + SIS_PLAY_STOP_A_REG);
 630                 if (play[1])
 631                         outl(play[1], io + SIS_PLAY_STOP_B_REG);
 632         }
 633         return 0;
 634 }
 635
 636 static snd_pcm_uframes_t sis_pcm_pointer(struct snd_pcm_substream *substream)
 637 {
 638         struct snd_pcm_runtime *runtime = substream->runtime;
 639         struct voice *voice = runtime->private_data;
 640         u32 cso;
 641
 642         cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 643         cso &= 0xffff;
 644         return cso;
 645 }
 646
 647 static int sis_capture_open(struct snd_pcm_substream *substream)
 648 {
 649         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 650         struct snd_pcm_runtime *runtime = substream->runtime;
 651         struct voice *voice = &sis->capture_voice;
 652         unsigned long flags;
 653
 654         /* FIXME: The driver only supports recording from one channel
 655          * at the moment, but it could support more.
 656          */
 657         spin_lock_irqsave(&sis->voice_lock, flags);
 658         if (voice->flags & VOICE_IN_USE)
 659                 voice = NULL;
 660         else
 661                 voice->flags |= VOICE_IN_USE;
 662         spin_unlock_irqrestore(&sis->voice_lock, flags);
 663
 664         if (!voice)
 665                 return -EAGAIN;
 666
 667         voice->substream = substream;
 668         runtime->private_data = voice;
 669         runtime->hw = sis_capture_hw_info;
 670         runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
 671         snd_pcm_limit_hw_rates(runtime);
 672         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 673                                                 9, 0xfff9);
 674         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 675                                                 9, 0xfff9);
 676         snd_pcm_set_sync(substream);
 677         return 0;
 678 }
 679
 680 static int sis_capture_hw_params(struct snd_pcm_substream *substream,
 681                                         struct snd_pcm_hw_params *hw_params)
 682 {
 683         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 684         int rc;
 685
 686         rc = snd_ac97_set_rate(sis->ac97[0], AC97_PCM_LR_ADC_RATE,
 687                                                 params_rate(hw_params));
 688         if (rc)
 689                 goto out;
 690
 691         rc = sis_alloc_timing_voice(substream, hw_params);
 692
 693 out:
 694         return rc;
 695 }
 696
 697 static void sis_prepare_timing_voice(struct voice *voice,
 698                                         struct snd_pcm_substream *substream)
 699 {
 700         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 701         struct snd_pcm_runtime *runtime = substream->runtime;
 702         struct voice *timing = voice->timing;
 703         void __iomem *play_base = timing->ctrl_base;
 704         void __iomem *wave_base = timing->wave_base;
 705         u16 buffer_size, period_size;
 706         u32 format, control, sso_eso, delta;
 707         u32 vperiod, sso, reg;
 708
 709         /* Set our initial buffer and period as large as we can given a
 710          * single page of silence.
 711          */
 712         buffer_size = 4096 / runtime->channels;
 713         buffer_size /= snd_pcm_format_size(runtime->format, 1);
 714         period_size = buffer_size;
 715
 716         /* Initially, we want to interrupt just a bit behind the end of
 717          * the period we're clocking out. 12 samples seems to give a good
 718          * delay.
 719          *
 720          * We want to spread our interrupts throughout the virtual period,
 721          * so that we don't end up with two interrupts back to back at the
 722          * end -- this helps minimize the effects of any jitter. Adjust our
 723          * clocking period size so that the last period is at least a fourth
 724          * of a full period.
 725          *
 726          * This is all moot if we don't need to use virtual periods.
 727          */
 728         vperiod = runtime->period_size + 12;
 729         if (vperiod > period_size) {
 730                 u16 tail = vperiod % period_size;
 731                 u16 quarter_period = period_size / 4;
 732
 733                 if (tail && tail < quarter_period) {
 734                         u16 loops = vperiod / period_size;
 735
 736                         tail = quarter_period - tail;
 737                         tail += loops - 1;
 738                         tail /= loops;
 739                         period_size -= tail;
 740                 }
 741
 742                 sso = period_size - 1;
 743         } else {
 744                 /* The initial period will fit inside the buffer, so we
 745                  * don't need to use virtual periods -- disable them.
 746                  */
 747                 period_size = runtime->period_size;
 748                 sso = vperiod - 1;
 749                 vperiod = 0;
 750         }
 751
 752         /* The interrupt handler implements the timing synchronization, so
 753          * setup its state.
 754          */
 755         timing->flags |= VOICE_SYNC_TIMING;
 756         timing->sync_base = voice->ctrl_base;
 757         timing->sync_cso = runtime->period_size;
 758         timing->sync_period_size = runtime->period_size;
 759         timing->sync_buffer_size = runtime->buffer_size;
 760         timing->period_size = period_size;
 761         timing->buffer_size = buffer_size;
 762         timing->sso = sso;
 763         timing->vperiod = vperiod;
 764
 765         /* Using unsigned samples with the all-zero silence buffer
 766          * forces the output to the lower rail, killing playback.
 767          * So ignore unsigned vs signed -- it doesn't change the timing.
 768          */
 769         format = 0;
 770         if (snd_pcm_format_width(runtime->format) == 8)
 771                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 772         if (runtime->channels == 1)
 773                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 774
 775         control = timing->buffer_size - 1;
 776         control |= SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_SSO;
 777         sso_eso = timing->buffer_size - 1;
 778         sso_eso |= timing->sso << 16;
 779
 780         delta = sis_rate_to_delta(runtime->rate);
 781
 782         /* We've done the math, now configure the channel.
 783          */
 784         writel(format, play_base + SIS_PLAY_DMA_FORMAT_CSO);
 785         writel(sis->silence_dma_addr, play_base + SIS_PLAY_DMA_BASE);
 786         writel(control, play_base + SIS_PLAY_DMA_CONTROL);
 787         writel(sso_eso, play_base + SIS_PLAY_DMA_SSO_ESO);
 788
 789         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 790                 writel(0, wave_base + reg);
 791
 792         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 793         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 794         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 795                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 796                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 797                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 798 }
 799
 800 static int sis_pcm_capture_prepare(struct snd_pcm_substream *substream)
 801 {
 802         struct snd_pcm_runtime *runtime = substream->runtime;
 803         struct voice *voice = runtime->private_data;
 804         void __iomem *rec_base = voice->ctrl_base;
 805         u32 format, dma_addr, control;
 806         u16 leo;
 807
 808         /* We rely on the PCM core to ensure that the parameters for this
 809          * substream do not change on us while we're programming the HW.
 810          */
 811         format = 0;
 812         if (snd_pcm_format_width(runtime->format) == 8)
 813                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 814         if (!snd_pcm_format_signed(runtime->format))
 815                 format |= SIS_CAPTURE_DMA_FORMAT_UNSIGNED;
 816         if (runtime->channels == 1)
 817                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 818
 819         dma_addr = runtime->dma_addr;
 820         leo = runtime->buffer_size - 1;
 821         control = leo | SIS_CAPTURE_DMA_LOOP;
 822
 823         /* If we've got more than two periods per buffer, then we have
 824          * use a timing voice to clock out the periods. Otherwise, we can
 825          * use the capture channel's interrupts.
 826          */
 827         if (voice->timing) {
 828                 sis_prepare_timing_voice(voice, substream);
 829         } else {
 830                 control |= SIS_CAPTURE_DMA_INTR_AT_LEO;
 831                 if (runtime->period_size != runtime->buffer_size)
 832                         control |= SIS_CAPTURE_DMA_INTR_AT_MLP;
 833         }
 834
 835         writel(format, rec_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 836         writel(dma_addr, rec_base + SIS_CAPTURE_DMA_BASE);
 837         writel(control, rec_base + SIS_CAPTURE_DMA_CONTROL);
 838
 839         /* Force the writes to post. */
 840         readl(rec_base);
 841
 842         return 0;
 843 }
 844
 845 static const struct snd_pcm_ops sis_playback_ops = {
 846         .open = sis_playback_open,
 847         .close = sis_substream_close,
 848         .prepare = sis_pcm_playback_prepare,
 849         .trigger = sis_pcm_trigger,
 850         .pointer = sis_pcm_pointer,
 851 };
 852
 853 static const struct snd_pcm_ops sis_capture_ops = {
 854         .open = sis_capture_open,
 855         .close = sis_substream_close,
 856         .hw_params = sis_capture_hw_params,
 857         .prepare = sis_pcm_capture_prepare,
 858         .trigger = sis_pcm_trigger,
 859         .pointer = sis_pcm_pointer,
 860 };
 861
 862 static int sis_pcm_create(struct sis7019 *sis)
 863 {
 864         struct snd_pcm *pcm;
 865         int rc;
 866
 867         /* We have 64 voices, and the driver currently records from
 868          * only one channel, though that could change in the future.
 869          */
 870         rc = snd_pcm_new(sis->card, "SiS7019", 0, 64, 1, &pcm);
 871         if (rc)
 872                 return rc;
 873
 874         pcm->private_data = sis;
 875         strcpy(pcm->name, "SiS7019");
 876         sis->pcm = pcm;
 877
 878         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &sis_playback_ops);
 879         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &sis_capture_ops);
 880
 881         /* Try to preallocate some memory, but it's not the end of the
 882          * world if this fails.
 883          */
 884         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 885                                        &sis->pci->dev, 64*1024, 128*1024);
 886
 887         return 0;
 888 }
 889
 890 static unsigned short sis_ac97_rw(struct sis7019 *sis, int codec, u32 cmd)
 891 {
 892         unsigned long io = sis->ioport;
 893         unsigned short val = 0xffff;
 894         u16 status;
 895         u16 rdy;
 896         int count;
 897         static const u16 codec_ready[3] = {
 898                 SIS_AC97_STATUS_CODEC_READY,
 899                 SIS_AC97_STATUS_CODEC2_READY,
 900                 SIS_AC97_STATUS_CODEC3_READY,
 901         };
 902
 903         rdy = codec_ready[codec];
 904
 905
 906         /* Get the AC97 semaphore -- software first, so we don't spin
 907          * pounding out IO reads on the hardware semaphore...
 908          */
 909         mutex_lock(&sis->ac97_mutex);
 910
 911         count = 0xffff;
 912         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
 913                 udelay(1);
 914
 915         if (!count)
 916                 goto timeout;
 917
 918         /* ... and wait for any outstanding commands to complete ...
 919          */
 920         count = 0xffff;
 921         do {
 922                 status = inw(io + SIS_AC97_STATUS);
 923                 if ((status & rdy) && !(status & SIS_AC97_STATUS_BUSY))
 924                         break;
 925
 926                 udelay(1);
 927         } while (--count);
 928
 929         if (!count)
 930                 goto timeout_sema;
 931
 932         /* ... before sending our command and waiting for it to finish ...
 933          */
 934         outl(cmd, io + SIS_AC97_CMD);
 935         udelay(10);
 936
 937         count = 0xffff;
 938         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
 939                 udelay(1);
 940
 941         /* ... and reading the results (if any).
 942          */
 943         val = inl(io + SIS_AC97_CMD) >> 16;
 944
 945 timeout_sema:
 946         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
 947 timeout:
 948         mutex_unlock(&sis->ac97_mutex);
 949
 950         if (!count) {
 951                 dev_err(&sis->pci->dev, "ac97 codec %d timeout cmd 0x%08x\n",
 952                                         codec, cmd);
 953         }
 954
 955         return val;
 956 }
 957
 958 static void sis_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 959                                 unsigned short val)
 960 {
 961         static const u32 cmd[3] = {
 962                 SIS_AC97_CMD_CODEC_WRITE,
 963                 SIS_AC97_CMD_CODEC2_WRITE,
 964                 SIS_AC97_CMD_CODEC3_WRITE,
 965         };
 966         sis_ac97_rw(ac97->private_data, ac97->num,
 967                         (val << 16) | (reg << 8) | cmd[ac97->num]);
 968 }
 969
 970 static unsigned short sis_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
 971 {
 972         static const u32 cmd[3] = {
 973                 SIS_AC97_CMD_CODEC_READ,
 974                 SIS_AC97_CMD_CODEC2_READ,
 975                 SIS_AC97_CMD_CODEC3_READ,
 976         };
 977         return sis_ac97_rw(ac97->private_data, ac97->num,
 978                                         (reg << 8) | cmd[ac97->num]);
 979 }
 980
 981 static int sis_mixer_create(struct sis7019 *sis)
 982 {
 983         struct snd_ac97_bus *bus;
 984         struct snd_ac97_template ac97;
 985         static const struct snd_ac97_bus_ops ops = {
 986                 .write = sis_ac97_write,
 987                 .read = sis_ac97_read,
 988         };
 989         int rc;
 990
 991         memset(&ac97, 0, sizeof(ac97));
 992         ac97.private_data = sis;
 993
 994         rc = snd_ac97_bus(sis->card, 0, &ops, NULL, &bus);
 995         if (!rc && sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
 996                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[0]);
 997         ac97.num = 1;
 998         if (!rc && (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT))
 999                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[1]);
1000         ac97.num = 2;
1001         if (!rc && (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT))
1002                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[2]);
1003
1004         /* If we return an error here, then snd_card_free() should
1005          * free up any ac97 codecs that got created, as well as the bus.
1006          */
1007         return rc;
1008 }
1009
1010 static void sis_chip_free(struct snd_card *card)
1011 {
1012         struct sis7019 *sis = card->private_data;
1013
1014         /* Reset the chip, and disable all interrputs.
1015          */
1016         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
1017         udelay(25);
1018         outl(0, sis->ioport + SIS_GCR);
1019         outl(0, sis->ioport + SIS_GIER);
1020
1021         /* Now, free everything we allocated.
1022          */
1023         if (sis->irq >= 0)
1024                 free_irq(sis->irq, sis);
1025 }
1026
1027 static int sis_chip_init(struct sis7019 *sis)
1028 {
1029         unsigned long io = sis->ioport;
1030         void __iomem *ioaddr = sis->ioaddr;
1031         unsigned long timeout;
1032         u16 status;
1033         int count;
1034         int i;
1035
1036         /* Reset the audio controller
1037          */
1038         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
1039         udelay(25);
1040         outl(0, io + SIS_GCR);
1041
1042         /* Get the AC-link semaphore, and reset the codecs
1043          */
1044         count = 0xffff;
1045         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
1046                 udelay(1);
1047
1048         if (!count)
1049                 return -EIO;
1050
1051         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
1052         udelay(250);
1053
1054         count = 0xffff;
1055         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
1056                 udelay(1);
1057
1058         /* Command complete, we can let go of the semaphore now.
1059          */
1060         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
1061         if (!count)
1062                 return -EIO;
1063
1064         /* Now that we've finished the reset, find out what's attached.
1065          * There are some codec/board combinations that take an extremely
1066          * long time to come up. 350+ ms has been observed in the field,
1067          * so we'll give them up to 500ms.
1068          */
1069         sis->codecs_present = 0;
1070         timeout = msecs_to_jiffies(500) + jiffies;
1071         while (time_before_eq(jiffies, timeout)) {
1072                 status = inl(io + SIS_AC97_STATUS);
1073                 if (status & SIS_AC97_STATUS_CODEC_READY)
1074                         sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
1075                 if (status & SIS_AC97_STATUS_CODEC2_READY)
1076                         sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
1077                 if (status & SIS_AC97_STATUS_CODEC3_READY)
1078                         sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
1079
1080                 if (sis->codecs_present == codecs)
1081                         break;
1082
1083                 msleep(1);
1084         }
1085
1086         /* All done, check for errors.
1087          */
1088         if (!sis->codecs_present) {
1089                 dev_err(&sis->pci->dev, "could not find any codecs\n");
1090                 return -EIO;
1091         }
1092
1093         if (sis->codecs_present != codecs) {
1094                 dev_warn(&sis->pci->dev, "missing codecs, found %0x, expected %0x\n",
1095                                          sis->codecs_present, codecs);
1096         }
1097
1098         /* Let the hardware know that the audio driver is alive,
1099          * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
1100          * record channels. We're going to want to use Variable Rate Audio
1101          * for recording, to avoid needlessly resampling from 48kHZ.
1102          */
1103         outl(SIS_AC97_CONF_AUDIO_ALIVE, io + SIS_AC97_CONF);
1104         outl(SIS_AC97_CONF_AUDIO_ALIVE | SIS_AC97_CONF_PCM_LR_ENABLE |
1105                 SIS_AC97_CONF_PCM_CAP_MIC_ENABLE |
1106                 SIS_AC97_CONF_PCM_CAP_LR_ENABLE |
1107                 SIS_AC97_CONF_CODEC_VRA_ENABLE, io + SIS_AC97_CONF);
1108
1109         /* All AC97 PCM slots should be sourced from sub-mixer 0.
1110          */
1111         outl(0, io + SIS_AC97_PSR);
1112
1113         /* There is only one valid DMA setup for a PCI environment.
1114          */
1115         outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
1116
1117         /* Reset the synchronization groups for all of the channels
1118          * to be asynchronous. If we start doing SPDIF or 5.1 sound, etc.
1119          * we'll need to change how we handle these. Until then, we just
1120          * assign sub-mixer 0 to all playback channels, and avoid any
1121          * attenuation on the audio.
1122          */
1123         outl(0, io + SIS_PLAY_SYNC_GROUP_A);
1124         outl(0, io + SIS_PLAY_SYNC_GROUP_B);
1125         outl(0, io + SIS_PLAY_SYNC_GROUP_C);
1126         outl(0, io + SIS_PLAY_SYNC_GROUP_D);
1127         outl(0, io + SIS_MIXER_SYNC_GROUP);
1128
1129         for (i = 0; i < 64; i++) {
1130                 writel(i, SIS_MIXER_START_ADDR(ioaddr, i));
1131                 writel(SIS_MIXER_RIGHT_NO_ATTEN | SIS_MIXER_LEFT_NO_ATTEN |
1132                                 SIS_MIXER_DEST_0, SIS_MIXER_ADDR(ioaddr, i));
1133         }
1134
1135         /* Don't attenuate any audio set for the wave amplifier.
1136          *
1137          * FIXME: Maximum attenuation is set for the music amp, which will
1138          * need to change if we start using the synth engine.
1139          */
1140         outl(0xffff0000, io + SIS_WEVCR);
1141
1142         /* Ensure that the wave engine is in normal operating mode.
1143          */
1144         outl(0, io + SIS_WECCR);
1145
1146         /* Go ahead and enable the DMA interrupts. They won't go live
1147          * until we start a channel.
1148          */
1149         outl(SIS_GIER_AUDIO_PLAY_DMA_IRQ_ENABLE |
1150                 SIS_GIER_AUDIO_RECORD_DMA_IRQ_ENABLE, io + SIS_GIER);
1151
1152         return 0;
1153 }
1154
1155 #ifdef CONFIG_PM_SLEEP
1156 static int sis_suspend(struct device *dev)
1157 {
1158         struct snd_card *card = dev_get_drvdata(dev);
1159         struct sis7019 *sis = card->private_data;
1160         void __iomem *ioaddr = sis->ioaddr;
1161         int i;
1162
1163         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1164         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1165                 snd_ac97_suspend(sis->ac97[0]);
1166         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1167                 snd_ac97_suspend(sis->ac97[1]);
1168         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1169                 snd_ac97_suspend(sis->ac97[2]);
1170
1171         /* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
1172          */
1173         if (sis->irq >= 0) {
1174                 free_irq(sis->irq, sis);
1175                 sis->irq = -1;
1176         }
1177
1178         /* Save the internal state away
1179          */
1180         for (i = 0; i < 4; i++) {
1181                 memcpy_fromio(sis->suspend_state[i], ioaddr, 4096);
1182                 ioaddr += 4096;
1183         }
1184
1185         return 0;
1186 }
1187
1188 static int sis_resume(struct device *dev)
1189 {
1190         struct pci_dev *pci = to_pci_dev(dev);
1191         struct snd_card *card = dev_get_drvdata(dev);
1192         struct sis7019 *sis = card->private_data;
1193         void __iomem *ioaddr = sis->ioaddr;
1194         int i;
1195
1196         if (sis_chip_init(sis)) {
1197                 dev_err(&pci->dev, "unable to re-init controller\n");
1198                 goto error;
1199         }
1200
1201         if (request_irq(pci->irq, sis_interrupt, IRQF_SHARED,
1202                         KBUILD_MODNAME, sis)) {
1203                 dev_err(&pci->dev, "unable to regain IRQ %d\n", pci->irq);
1204                 goto error;
1205         }
1206
1207         /* Restore saved state, then clear out the page we use for the
1208          * silence buffer.
1209          */
1210         for (i = 0; i < 4; i++) {
1211                 memcpy_toio(ioaddr, sis->suspend_state[i], 4096);
1212                 ioaddr += 4096;
1213         }
1214
1215         memset(sis->suspend_state[0], 0, 4096);
1216
1217         sis->irq = pci->irq;
1218
1219         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1220                 snd_ac97_resume(sis->ac97[0]);
1221         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1222                 snd_ac97_resume(sis->ac97[1]);
1223         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1224                 snd_ac97_resume(sis->ac97[2]);
1225
1226         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1227         return 0;
1228
1229 error:
1230         snd_card_disconnect(card);
1231         return -EIO;
1232 }
1233
1234 static SIMPLE_DEV_PM_OPS(sis_pm, sis_suspend, sis_resume);
1235 #define SIS_PM_OPS      &sis_pm
1236 #else
1237 #define SIS_PM_OPS      NULL
1238 #endif /* CONFIG_PM_SLEEP */
1239
1240 static int sis_alloc_suspend(struct sis7019 *sis)
1241 {
1242         int i;
1243
1244         /* We need 16K to store the internal wave engine state during a
1245          * suspend, but we don't need it to be contiguous, so play nice
1246          * with the memory system. We'll also use this area for a silence
1247          * buffer.
1248          */
1249         for (i = 0; i < SIS_SUSPEND_PAGES; i++) {
1250                 sis->suspend_state[i] = devm_kmalloc(&sis->pci->dev, 4096,
1251                                                      GFP_KERNEL);
1252                 if (!sis->suspend_state[i])
1253                         return -ENOMEM;
1254         }
1255         memset(sis->suspend_state[0], 0, 4096);
1256
1257         return 0;
1258 }
1259
1260 static int sis_chip_create(struct snd_card *card,
1261                            struct pci_dev *pci)
1262 {
1263         struct sis7019 *sis = card->private_data;
1264         struct voice *voice;
1265         int rc;
1266         int i;
1267
1268         rc = pcim_enable_device(pci);
1269         if (rc)
1270                 return rc;
1271
1272         rc = dma_set_mask(&pci->dev, DMA_BIT_MASK(30));
1273         if (rc < 0) {
1274                 dev_err(&pci->dev, "architecture does not support 30-bit PCI busmaster DMA");
1275                 return -ENXIO;
1276         }
1277
1278         mutex_init(&sis->ac97_mutex);
1279         spin_lock_init(&sis->voice_lock);
1280         sis->card = card;
1281         sis->pci = pci;
1282         sis->irq = -1;
1283         sis->ioport = pci_resource_start(pci, 0);
1284
1285         rc = pci_request_regions(pci, "SiS7019");
1286         if (rc) {
1287                 dev_err(&pci->dev, "unable request regions\n");
1288                 return rc;
1289         }
1290
1291         sis->ioaddr = devm_ioremap(&pci->dev, pci_resource_start(pci, 1), 0x4000);
1292         if (!sis->ioaddr) {
1293                 dev_err(&pci->dev, "unable to remap MMIO, aborting\n");
1294                 return -EIO;
1295         }
1296
1297         rc = sis_alloc_suspend(sis);
1298         if (rc < 0) {
1299                 dev_err(&pci->dev, "unable to allocate state storage\n");
1300                 return rc;
1301         }
1302
1303         rc = sis_chip_init(sis);
1304         if (rc)
1305                 return rc;
1306         card->private_free = sis_chip_free;
1307
1308         rc = request_irq(pci->irq, sis_interrupt, IRQF_SHARED, KBUILD_MODNAME,
1309                          sis);
1310         if (rc) {
1311                 dev_err(&pci->dev, "unable to allocate irq %d\n", sis->irq);
1312                 return rc;
1313         }
1314
1315         sis->irq = pci->irq;
1316         card->sync_irq = sis->irq;
1317         pci_set_master(pci);
1318
1319         for (i = 0; i < 64; i++) {
1320                 voice = &sis->voices[i];
1321                 voice->num = i;
1322                 voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);
1323                 voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);
1324         }
1325
1326         voice = &sis->capture_voice;
1327         voice->flags = VOICE_CAPTURE;
1328         voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;
1329         voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);
1330
1331         return 0;
1332 }
1333
1334 static int snd_sis7019_probe(struct pci_dev *pci,
1335                              const struct pci_device_id *pci_id)
1336 {
1337         struct snd_card *card;
1338         struct sis7019 *sis;
1339         int rc;
1340
1341         if (!enable)
1342                 return -ENOENT;
1343
1344         /* The user can specify which codecs should be present so that we
1345          * can wait for them to show up if they are slow to recover from
1346          * the AC97 cold reset. We default to a single codec, the primary.
1347          *
1348          * We assume that SIS_PRIMARY_*_PRESENT matches bits 0-2.
1349          */
1350         codecs &= SIS_PRIMARY_CODEC_PRESENT | SIS_SECONDARY_CODEC_PRESENT |
1351                   SIS_TERTIARY_CODEC_PRESENT;
1352         if (!codecs)
1353                 codecs = SIS_PRIMARY_CODEC_PRESENT;
1354
1355         rc = snd_card_new(&pci->dev, index, id, THIS_MODULE,
1356                           sizeof(*sis), &card);
1357         if (rc < 0)
1358                 return rc;
1359
1360         strcpy(card->driver, "SiS7019");
1361         strcpy(card->shortname, "SiS7019");
1362         rc = sis_chip_create(card, pci);
1363         if (rc)
1364                 return rc;
1365
1366         sis = card->private_data;
1367
1368         rc = sis_mixer_create(sis);
1369         if (rc)
1370                 return rc;
1371
1372         rc = sis_pcm_create(sis);
1373         if (rc)
1374                 return rc;
1375
1376         snprintf(card->longname, sizeof(card->longname),
1377                         "%s Audio Accelerator with %s at 0x%lx, irq %d",
1378                         card->shortname, snd_ac97_get_short_name(sis->ac97[0]),
1379                         sis->ioport, sis->irq);
1380
1381         rc = snd_card_register(card);
1382         if (rc)
1383                 return rc;
1384
1385         pci_set_drvdata(pci, card);
1386         return 0;
1387 }
1388
1389 static struct pci_driver sis7019_driver = {
1390         .name = KBUILD_MODNAME,
1391         .id_table = snd_sis7019_ids,
1392         .probe = snd_sis7019_probe,
1393         .driver = {
1394                 .pm = SIS_PM_OPS,
1395         },
1396 };
1397
1398 module_pci_driver(sis7019_driver);