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 #define SIS_SUSPEND_PAGES       4
  94
  95 struct sis7019 {
  96         unsigned long ioport;
  97         void __iomem *ioaddr;
  98         int irq;
  99         int codecs_present;
 100
 101         struct pci_dev *pci;
 102         struct snd_pcm *pcm;
 103         struct snd_card *card;
 104         struct snd_ac97 *ac97[3];
 105
 106         /* Protect against more than one thread hitting the AC97
 107          * registers (in a more polite manner than pounding the hardware
 108          * semaphore)
 109          */
 110         struct mutex ac97_mutex;
 111
 112         /* voice_lock protects allocation/freeing of the voice descriptions
 113          */
 114         spinlock_t voice_lock;
 115
 116         struct voice voices[64];
 117         struct voice capture_voice;
 118
 119         /* Allocate pages to store the internal wave state during
 120          * suspends. When we're operating, this can be used as a silence
 121          * buffer for a timing channel.
 122          */
 123         void *suspend_state[SIS_SUSPEND_PAGES];
 124
 125         int silence_users;
 126         dma_addr_t silence_dma_addr;
 127 };
 128
 129 /* These values are also used by the module param 'codecs' to indicate
 130  * which codecs should be present.
 131  */
 132 #define SIS_PRIMARY_CODEC_PRESENT       0x0001
 133 #define SIS_SECONDARY_CODEC_PRESENT     0x0002
 134 #define SIS_TERTIARY_CODEC_PRESENT      0x0004
 135
 136 /* The HW offset parameters (Loop End, Stop Sample, End Sample) have a
 137  * documented range of 8-0xfff8 samples. Given that they are 0-based,
 138  * that places our period/buffer range at 9-0xfff9 samples. That makes the
 139  * max buffer size 0xfff9 samples * 2 channels * 2 bytes per sample, and
 140  * max samples / min samples gives us the max periods in a buffer.
 141  *
 142  * We'll add a constraint upon open that limits the period and buffer sample
 143  * size to values that are legal for the hardware.
 144  */
 145 static const struct snd_pcm_hardware sis_playback_hw_info = {
 146         .info = (SNDRV_PCM_INFO_MMAP |
 147                  SNDRV_PCM_INFO_MMAP_VALID |
 148                  SNDRV_PCM_INFO_INTERLEAVED |
 149                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 150                  SNDRV_PCM_INFO_SYNC_START |
 151                  SNDRV_PCM_INFO_RESUME),
 152         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 153                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 154         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS,
 155         .rate_min = 4000,
 156         .rate_max = 48000,
 157         .channels_min = 1,
 158         .channels_max = 2,
 159         .buffer_bytes_max = (0xfff9 * 4),
 160         .period_bytes_min = 9,
 161         .period_bytes_max = (0xfff9 * 4),
 162         .periods_min = 1,
 163         .periods_max = (0xfff9 / 9),
 164 };
 165
 166 static const struct snd_pcm_hardware sis_capture_hw_info = {
 167         .info = (SNDRV_PCM_INFO_MMAP |
 168                  SNDRV_PCM_INFO_MMAP_VALID |
 169                  SNDRV_PCM_INFO_INTERLEAVED |
 170                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 171                  SNDRV_PCM_INFO_SYNC_START |
 172                  SNDRV_PCM_INFO_RESUME),
 173         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 174                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 175         .rates = SNDRV_PCM_RATE_48000,
 176         .rate_min = 4000,
 177         .rate_max = 48000,
 178         .channels_min = 1,
 179         .channels_max = 2,
 180         .buffer_bytes_max = (0xfff9 * 4),
 181         .period_bytes_min = 9,
 182         .period_bytes_max = (0xfff9 * 4),
 183         .periods_min = 1,
 184         .periods_max = (0xfff9 / 9),
 185 };
 186
 187 static void sis_update_sso(struct voice *voice, u16 period)
 188 {
 189         void __iomem *base = voice->ctrl_base;
 190
 191         voice->sso += period;
 192         if (voice->sso >= voice->buffer_size)
 193                 voice->sso -= voice->buffer_size;
 194
 195         /* Enforce the documented hardware minimum offset */
 196         if (voice->sso < 8)
 197                 voice->sso = 8;
 198
 199         /* The SSO is in the upper 16 bits of the register. */
 200         writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);
 201 }
 202
 203 static void sis_update_voice(struct voice *voice)
 204 {
 205         if (voice->flags & VOICE_SSO_TIMING) {
 206                 sis_update_sso(voice, voice->period_size);
 207         } else if (voice->flags & VOICE_SYNC_TIMING) {
 208                 int sync;
 209
 210                 /* If we've not hit the end of the virtual period, update
 211                  * our records and keep going.
 212                  */
 213                 if (voice->vperiod > voice->period_size) {
 214                         voice->vperiod -= voice->period_size;
 215                         if (voice->vperiod < voice->period_size)
 216                                 sis_update_sso(voice, voice->vperiod);
 217                         else
 218                                 sis_update_sso(voice, voice->period_size);
 219                         return;
 220                 }
 221
 222                 /* Calculate our relative offset between the target and
 223                  * the actual CSO value. Since we're operating in a loop,
 224                  * if the value is more than half way around, we can
 225                  * consider ourselves wrapped.
 226                  */
 227                 sync = voice->sync_cso;
 228                 sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 229                 if (sync > (voice->sync_buffer_size / 2))
 230                         sync -= voice->sync_buffer_size;
 231
 232                 /* If sync is positive, then we interrupted too early, and
 233                  * we'll need to come back in a few samples and try again.
 234                  * There's a minimum wait, as it takes some time for the DMA
 235                  * engine to startup, etc...
 236                  */
 237                 if (sync > 0) {
 238                         if (sync < 16)
 239                                 sync = 16;
 240                         sis_update_sso(voice, sync);
 241                         return;
 242                 }
 243
 244                 /* Ok, we interrupted right on time, or (hopefully) just
 245                  * a bit late. We'll adjst our next waiting period based
 246                  * on how close we got.
 247                  *
 248                  * We need to stay just behind the actual channel to ensure
 249                  * it really is past a period when we get our interrupt --
 250                  * otherwise we'll fall into the early code above and have
 251                  * a minimum wait time, which makes us quite late here,
 252                  * eating into the user's time to refresh the buffer, esp.
 253                  * if using small periods.
 254                  *
 255                  * If we're less than 9 samples behind, we're on target.
 256                  * Otherwise, shorten the next vperiod by the amount we've
 257                  * been delayed.
 258                  */
 259                 if (sync > -9)
 260                         voice->vperiod = voice->sync_period_size + 1;
 261                 else
 262                         voice->vperiod = voice->sync_period_size + sync + 10;
 263
 264                 if (voice->vperiod < voice->buffer_size) {
 265                         sis_update_sso(voice, voice->vperiod);
 266                         voice->vperiod = 0;
 267                 } else
 268                         sis_update_sso(voice, voice->period_size);
 269
 270                 sync = voice->sync_cso + voice->sync_period_size;
 271                 if (sync >= voice->sync_buffer_size)
 272                         sync -= voice->sync_buffer_size;
 273                 voice->sync_cso = sync;
 274         }
 275
 276         snd_pcm_period_elapsed(voice->substream);
 277 }
 278
 279 static void sis_voice_irq(u32 status, struct voice *voice)
 280 {
 281         int bit;
 282
 283         while (status) {
 284                 bit = __ffs(status);
 285                 status >>= bit + 1;
 286                 voice += bit;
 287                 sis_update_voice(voice);
 288                 voice++;
 289         }
 290 }
 291
 292 static irqreturn_t sis_interrupt(int irq, void *dev)
 293 {
 294         struct sis7019 *sis = dev;
 295         unsigned long io = sis->ioport;
 296         struct voice *voice;
 297         u32 intr, status;
 298
 299         /* We only use the DMA interrupts, and we don't enable any other
 300          * source of interrupts. But, it is possible to see an interrupt
 301          * status that didn't actually interrupt us, so eliminate anything
 302          * we're not expecting to avoid falsely claiming an IRQ, and an
 303          * ensuing endless loop.
 304          */
 305         intr = inl(io + SIS_GISR);
 306         intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 307                 SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 308         if (!intr)
 309                 return IRQ_NONE;
 310
 311         do {
 312                 status = inl(io + SIS_PISR_A);
 313                 if (status) {
 314                         sis_voice_irq(status, sis->voices);
 315                         outl(status, io + SIS_PISR_A);
 316                 }
 317
 318                 status = inl(io + SIS_PISR_B);
 319                 if (status) {
 320                         sis_voice_irq(status, &sis->voices[32]);
 321                         outl(status, io + SIS_PISR_B);
 322                 }
 323
 324                 status = inl(io + SIS_RISR);
 325                 if (status) {
 326                         voice = &sis->capture_voice;
 327                         if (!voice->timing)
 328                                 snd_pcm_period_elapsed(voice->substream);
 329
 330                         outl(status, io + SIS_RISR);
 331                 }
 332
 333                 outl(intr, io + SIS_GISR);
 334                 intr = inl(io + SIS_GISR);
 335                 intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 336                         SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 337         } while (intr);
 338
 339         return IRQ_HANDLED;
 340 }
 341
 342 static u32 sis_rate_to_delta(unsigned int rate)
 343 {
 344         u32 delta;
 345
 346         /* This was copied from the trident driver, but it seems its gotten
 347          * around a bit... nevertheless, it works well.
 348          *
 349          * We special case 44100 and 8000 since rounding with the equation
 350          * does not give us an accurate enough value. For 11025 and 22050
 351          * the equation gives us the best answer. All other frequencies will
 352          * also use the equation. JDW
 353          */
 354         if (rate == 44100)
 355                 delta = 0xeb3;
 356         else if (rate == 8000)
 357                 delta = 0x2ab;
 358         else if (rate == 48000)
 359                 delta = 0x1000;
 360         else
 361                 delta = DIV_ROUND_CLOSEST(rate << 12, 48000) & 0x0000ffff;
 362         return delta;
 363 }
 364
 365 static void __sis_map_silence(struct sis7019 *sis)
 366 {
 367         /* Helper function: must hold sis->voice_lock on entry */
 368         if (!sis->silence_users)
 369                 sis->silence_dma_addr = dma_map_single(&sis->pci->dev,
 370                                                 sis->suspend_state[0],
 371                                                 4096, DMA_TO_DEVICE);
 372         sis->silence_users++;
 373 }
 374
 375 static void __sis_unmap_silence(struct sis7019 *sis)
 376 {
 377         /* Helper function: must hold sis->voice_lock on entry */
 378         sis->silence_users--;
 379         if (!sis->silence_users)
 380                 dma_unmap_single(&sis->pci->dev, sis->silence_dma_addr, 4096,
 381                                         DMA_TO_DEVICE);
 382 }
 383
 384 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)
 385 {
 386         unsigned long flags;
 387
 388         spin_lock_irqsave(&sis->voice_lock, flags);
 389         if (voice->timing) {
 390                 __sis_unmap_silence(sis);
 391                 voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |
 392                                                 VOICE_SYNC_TIMING);
 393                 voice->timing = NULL;
 394         }
 395         voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);
 396         spin_unlock_irqrestore(&sis->voice_lock, flags);
 397 }
 398
 399 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)
 400 {
 401         /* Must hold the voice_lock on entry */
 402         struct voice *voice;
 403         int i;
 404
 405         for (i = 0; i < 64; i++) {
 406                 voice = &sis->voices[i];
 407                 if (voice->flags & VOICE_IN_USE)
 408                         continue;
 409                 voice->flags |= VOICE_IN_USE;
 410                 goto found_one;
 411         }
 412         voice = NULL;
 413
 414 found_one:
 415         return voice;
 416 }
 417
 418 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)
 419 {
 420         struct voice *voice;
 421         unsigned long flags;
 422
 423         spin_lock_irqsave(&sis->voice_lock, flags);
 424         voice = __sis_alloc_playback_voice(sis);
 425         spin_unlock_irqrestore(&sis->voice_lock, flags);
 426
 427         return voice;
 428 }
 429
 430 static int sis_alloc_timing_voice(struct snd_pcm_substream *substream,
 431                                         struct snd_pcm_hw_params *hw_params)
 432 {
 433         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 434         struct snd_pcm_runtime *runtime = substream->runtime;
 435         struct voice *voice = runtime->private_data;
 436         unsigned int period_size, buffer_size;
 437         unsigned long flags;
 438         int needed;
 439
 440         /* If there are one or two periods per buffer, we don't need a
 441          * timing voice, as we can use the capture channel's interrupts
 442          * to clock out the periods.
 443          */
 444         period_size = params_period_size(hw_params);
 445         buffer_size = params_buffer_size(hw_params);
 446         needed = (period_size != buffer_size &&
 447                         period_size != (buffer_size / 2));
 448
 449         if (needed && !voice->timing) {
 450                 spin_lock_irqsave(&sis->voice_lock, flags);
 451                 voice->timing = __sis_alloc_playback_voice(sis);
 452                 if (voice->timing)
 453                         __sis_map_silence(sis);
 454                 spin_unlock_irqrestore(&sis->voice_lock, flags);
 455                 if (!voice->timing)
 456                         return -ENOMEM;
 457                 voice->timing->substream = substream;
 458         } else if (!needed && voice->timing) {
 459                 sis_free_voice(sis, voice);
 460                 voice->timing = NULL;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static int sis_playback_open(struct snd_pcm_substream *substream)
 467 {
 468         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 469         struct snd_pcm_runtime *runtime = substream->runtime;
 470         struct voice *voice;
 471
 472         voice = sis_alloc_playback_voice(sis);
 473         if (!voice)
 474                 return -EAGAIN;
 475
 476         voice->substream = substream;
 477         runtime->private_data = voice;
 478         runtime->hw = sis_playback_hw_info;
 479         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 480                                                 9, 0xfff9);
 481         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 482                                                 9, 0xfff9);
 483         snd_pcm_set_sync(substream);
 484         return 0;
 485 }
 486
 487 static int sis_substream_close(struct snd_pcm_substream *substream)
 488 {
 489         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 490         struct snd_pcm_runtime *runtime = substream->runtime;
 491         struct voice *voice = runtime->private_data;
 492
 493         sis_free_voice(sis, voice);
 494         return 0;
 495 }
 496
 497 static int sis_pcm_playback_prepare(struct snd_pcm_substream *substream)
 498 {
 499         struct snd_pcm_runtime *runtime = substream->runtime;
 500         struct voice *voice = runtime->private_data;
 501         void __iomem *ctrl_base = voice->ctrl_base;
 502         void __iomem *wave_base = voice->wave_base;
 503         u32 format, dma_addr, control, sso_eso, delta, reg;
 504         u16 leo;
 505
 506         /* We rely on the PCM core to ensure that the parameters for this
 507          * substream do not change on us while we're programming the HW.
 508          */
 509         format = 0;
 510         if (snd_pcm_format_width(runtime->format) == 8)
 511                 format |= SIS_PLAY_DMA_FORMAT_8BIT;
 512         if (!snd_pcm_format_signed(runtime->format))
 513                 format |= SIS_PLAY_DMA_FORMAT_UNSIGNED;
 514         if (runtime->channels == 1)
 515                 format |= SIS_PLAY_DMA_FORMAT_MONO;
 516
 517         /* The baseline setup is for a single period per buffer, and
 518          * we add bells and whistles as needed from there.
 519          */
 520         dma_addr = runtime->dma_addr;
 521         leo = runtime->buffer_size - 1;
 522         control = leo | SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_LEO;
 523         sso_eso = leo;
 524
 525         if (runtime->period_size == (runtime->buffer_size / 2)) {
 526                 control |= SIS_PLAY_DMA_INTR_AT_MLP;
 527         } else if (runtime->period_size != runtime->buffer_size) {
 528                 voice->flags |= VOICE_SSO_TIMING;
 529                 voice->sso = runtime->period_size - 1;
 530                 voice->period_size = runtime->period_size;
 531                 voice->buffer_size = runtime->buffer_size;
 532
 533                 control &= ~SIS_PLAY_DMA_INTR_AT_LEO;
 534                 control |= SIS_PLAY_DMA_INTR_AT_SSO;
 535                 sso_eso |= (runtime->period_size - 1) << 16;
 536         }
 537
 538         delta = sis_rate_to_delta(runtime->rate);
 539
 540         /* Ok, we're ready to go, set up the channel.
 541          */
 542         writel(format, ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 543         writel(dma_addr, ctrl_base + SIS_PLAY_DMA_BASE);
 544         writel(control, ctrl_base + SIS_PLAY_DMA_CONTROL);
 545         writel(sso_eso, ctrl_base + SIS_PLAY_DMA_SSO_ESO);
 546
 547         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 548                 writel(0, wave_base + reg);
 549
 550         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 551         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 552         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 553                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 554                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 555                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 556
 557         /* Force PCI writes to post. */
 558         readl(ctrl_base);
 559
 560         return 0;
 561 }
 562
 563 static int sis_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 564 {
 565         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 566         unsigned long io = sis->ioport;
 567         struct snd_pcm_substream *s;
 568         struct voice *voice;
 569         void *chip;
 570         int starting;
 571         u32 record = 0;
 572         u32 play[2] = { 0, 0 };
 573
 574         /* No locks needed, as the PCM core will hold the locks on the
 575          * substreams, and the HW will only start/stop the indicated voices
 576          * without changing the state of the others.
 577          */
 578         switch (cmd) {
 579         case SNDRV_PCM_TRIGGER_START:
 580         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 581         case SNDRV_PCM_TRIGGER_RESUME:
 582                 starting = 1;
 583                 break;
 584         case SNDRV_PCM_TRIGGER_STOP:
 585         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 586         case SNDRV_PCM_TRIGGER_SUSPEND:
 587                 starting = 0;
 588                 break;
 589         default:
 590                 return -EINVAL;
 591         }
 592
 593         snd_pcm_group_for_each_entry(s, substream) {
 594                 /* Make sure it is for us... */
 595                 chip = snd_pcm_substream_chip(s);
 596                 if (chip != sis)
 597                         continue;
 598
 599                 voice = s->runtime->private_data;
 600                 if (voice->flags & VOICE_CAPTURE) {
 601                         record |= 1 << voice->num;
 602                         voice = voice->timing;
 603                 }
 604
 605                 /* voice could be NULL if this a recording stream, and it
 606                  * doesn't have an external timing channel.
 607                  */
 608                 if (voice)
 609                         play[voice->num / 32] |= 1 << (voice->num & 0x1f);
 610
 611                 snd_pcm_trigger_done(s, substream);
 612         }
 613
 614         if (starting) {
 615                 if (record)
 616                         outl(record, io + SIS_RECORD_START_REG);
 617                 if (play[0])
 618                         outl(play[0], io + SIS_PLAY_START_A_REG);
 619                 if (play[1])
 620                         outl(play[1], io + SIS_PLAY_START_B_REG);
 621         } else {
 622                 if (record)
 623                         outl(record, io + SIS_RECORD_STOP_REG);
 624                 if (play[0])
 625                         outl(play[0], io + SIS_PLAY_STOP_A_REG);
 626                 if (play[1])
 627                         outl(play[1], io + SIS_PLAY_STOP_B_REG);
 628         }
 629         return 0;
 630 }
 631
 632 static snd_pcm_uframes_t sis_pcm_pointer(struct snd_pcm_substream *substream)
 633 {
 634         struct snd_pcm_runtime *runtime = substream->runtime;
 635         struct voice *voice = runtime->private_data;
 636         u32 cso;
 637
 638         cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 639         cso &= 0xffff;
 640         return cso;
 641 }
 642
 643 static int sis_capture_open(struct snd_pcm_substream *substream)
 644 {
 645         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 646         struct snd_pcm_runtime *runtime = substream->runtime;
 647         struct voice *voice = &sis->capture_voice;
 648         unsigned long flags;
 649
 650         /* FIXME: The driver only supports recording from one channel
 651          * at the moment, but it could support more.
 652          */
 653         spin_lock_irqsave(&sis->voice_lock, flags);
 654         if (voice->flags & VOICE_IN_USE)
 655                 voice = NULL;
 656         else
 657                 voice->flags |= VOICE_IN_USE;
 658         spin_unlock_irqrestore(&sis->voice_lock, flags);
 659
 660         if (!voice)
 661                 return -EAGAIN;
 662
 663         voice->substream = substream;
 664         runtime->private_data = voice;
 665         runtime->hw = sis_capture_hw_info;
 666         runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
 667         snd_pcm_limit_hw_rates(runtime);
 668         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 669                                                 9, 0xfff9);
 670         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 671                                                 9, 0xfff9);
 672         snd_pcm_set_sync(substream);
 673         return 0;
 674 }
 675
 676 static int sis_capture_hw_params(struct snd_pcm_substream *substream,
 677                                         struct snd_pcm_hw_params *hw_params)
 678 {
 679         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 680         int rc;
 681
 682         rc = snd_ac97_set_rate(sis->ac97[0], AC97_PCM_LR_ADC_RATE,
 683                                                 params_rate(hw_params));
 684         if (rc)
 685                 goto out;
 686
 687         rc = sis_alloc_timing_voice(substream, hw_params);
 688
 689 out:
 690         return rc;
 691 }
 692
 693 static void sis_prepare_timing_voice(struct voice *voice,
 694                                         struct snd_pcm_substream *substream)
 695 {
 696         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 697         struct snd_pcm_runtime *runtime = substream->runtime;
 698         struct voice *timing = voice->timing;
 699         void __iomem *play_base = timing->ctrl_base;
 700         void __iomem *wave_base = timing->wave_base;
 701         u16 buffer_size, period_size;
 702         u32 format, control, sso_eso, delta;
 703         u32 vperiod, sso, reg;
 704
 705         /* Set our initial buffer and period as large as we can given a
 706          * single page of silence.
 707          */
 708         buffer_size = 4096 / runtime->channels;
 709         buffer_size /= snd_pcm_format_size(runtime->format, 1);
 710         period_size = buffer_size;
 711
 712         /* Initially, we want to interrupt just a bit behind the end of
 713          * the period we're clocking out. 12 samples seems to give a good
 714          * delay.
 715          *
 716          * We want to spread our interrupts throughout the virtual period,
 717          * so that we don't end up with two interrupts back to back at the
 718          * end -- this helps minimize the effects of any jitter. Adjust our
 719          * clocking period size so that the last period is at least a fourth
 720          * of a full period.
 721          *
 722          * This is all moot if we don't need to use virtual periods.
 723          */
 724         vperiod = runtime->period_size + 12;
 725         if (vperiod > period_size) {
 726                 u16 tail = vperiod % period_size;
 727                 u16 quarter_period = period_size / 4;
 728
 729                 if (tail && tail < quarter_period) {
 730                         u16 loops = vperiod / period_size;
 731
 732                         tail = quarter_period - tail;
 733                         tail += loops - 1;
 734                         tail /= loops;
 735                         period_size -= tail;
 736                 }
 737
 738                 sso = period_size - 1;
 739         } else {
 740                 /* The initial period will fit inside the buffer, so we
 741                  * don't need to use virtual periods -- disable them.
 742                  */
 743                 period_size = runtime->period_size;
 744                 sso = vperiod - 1;
 745                 vperiod = 0;
 746         }
 747
 748         /* The interrupt handler implements the timing synchronization, so
 749          * setup its state.
 750          */
 751         timing->flags |= VOICE_SYNC_TIMING;
 752         timing->sync_base = voice->ctrl_base;
 753         timing->sync_cso = runtime->period_size;
 754         timing->sync_period_size = runtime->period_size;
 755         timing->sync_buffer_size = runtime->buffer_size;
 756         timing->period_size = period_size;
 757         timing->buffer_size = buffer_size;
 758         timing->sso = sso;
 759         timing->vperiod = vperiod;
 760
 761         /* Using unsigned samples with the all-zero silence buffer
 762          * forces the output to the lower rail, killing playback.
 763          * So ignore unsigned vs signed -- it doesn't change the timing.
 764          */
 765         format = 0;
 766         if (snd_pcm_format_width(runtime->format) == 8)
 767                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 768         if (runtime->channels == 1)
 769                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 770
 771         control = timing->buffer_size - 1;
 772         control |= SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_SSO;
 773         sso_eso = timing->buffer_size - 1;
 774         sso_eso |= timing->sso << 16;
 775
 776         delta = sis_rate_to_delta(runtime->rate);
 777
 778         /* We've done the math, now configure the channel.
 779          */
 780         writel(format, play_base + SIS_PLAY_DMA_FORMAT_CSO);
 781         writel(sis->silence_dma_addr, play_base + SIS_PLAY_DMA_BASE);
 782         writel(control, play_base + SIS_PLAY_DMA_CONTROL);
 783         writel(sso_eso, play_base + SIS_PLAY_DMA_SSO_ESO);
 784
 785         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 786                 writel(0, wave_base + reg);
 787
 788         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 789         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 790         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 791                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 792                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 793                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 794 }
 795
 796 static int sis_pcm_capture_prepare(struct snd_pcm_substream *substream)
 797 {
 798         struct snd_pcm_runtime *runtime = substream->runtime;
 799         struct voice *voice = runtime->private_data;
 800         void __iomem *rec_base = voice->ctrl_base;
 801         u32 format, dma_addr, control;
 802         u16 leo;
 803
 804         /* We rely on the PCM core to ensure that the parameters for this
 805          * substream do not change on us while we're programming the HW.
 806          */
 807         format = 0;
 808         if (snd_pcm_format_width(runtime->format) == 8)
 809                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 810         if (!snd_pcm_format_signed(runtime->format))
 811                 format |= SIS_CAPTURE_DMA_FORMAT_UNSIGNED;
 812         if (runtime->channels == 1)
 813                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 814
 815         dma_addr = runtime->dma_addr;
 816         leo = runtime->buffer_size - 1;
 817         control = leo | SIS_CAPTURE_DMA_LOOP;
 818
 819         /* If we've got more than two periods per buffer, then we have
 820          * use a timing voice to clock out the periods. Otherwise, we can
 821          * use the capture channel's interrupts.
 822          */
 823         if (voice->timing) {
 824                 sis_prepare_timing_voice(voice, substream);
 825         } else {
 826                 control |= SIS_CAPTURE_DMA_INTR_AT_LEO;
 827                 if (runtime->period_size != runtime->buffer_size)
 828                         control |= SIS_CAPTURE_DMA_INTR_AT_MLP;
 829         }
 830
 831         writel(format, rec_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 832         writel(dma_addr, rec_base + SIS_CAPTURE_DMA_BASE);
 833         writel(control, rec_base + SIS_CAPTURE_DMA_CONTROL);
 834
 835         /* Force the writes to post. */
 836         readl(rec_base);
 837
 838         return 0;
 839 }
 840
 841 static const struct snd_pcm_ops sis_playback_ops = {
 842         .open = sis_playback_open,
 843         .close = sis_substream_close,
 844         .prepare = sis_pcm_playback_prepare,
 845         .trigger = sis_pcm_trigger,
 846         .pointer = sis_pcm_pointer,
 847 };
 848
 849 static const struct snd_pcm_ops sis_capture_ops = {
 850         .open = sis_capture_open,
 851         .close = sis_substream_close,
 852         .hw_params = sis_capture_hw_params,
 853         .prepare = sis_pcm_capture_prepare,
 854         .trigger = sis_pcm_trigger,
 855         .pointer = sis_pcm_pointer,
 856 };
 857
 858 static int sis_pcm_create(struct sis7019 *sis)
 859 {
 860         struct snd_pcm *pcm;
 861         int rc;
 862
 863         /* We have 64 voices, and the driver currently records from
 864          * only one channel, though that could change in the future.
 865          */
 866         rc = snd_pcm_new(sis->card, "SiS7019", 0, 64, 1, &pcm);
 867         if (rc)
 868                 return rc;
 869
 870         pcm->private_data = sis;
 871         strcpy(pcm->name, "SiS7019");
 872         sis->pcm = pcm;
 873
 874         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &sis_playback_ops);
 875         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &sis_capture_ops);
 876
 877         /* Try to preallocate some memory, but it's not the end of the
 878          * world if this fails.
 879          */
 880         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
 881                                        &sis->pci->dev, 64*1024, 128*1024);
 882
 883         return 0;
 884 }
 885
 886 static unsigned short sis_ac97_rw(struct sis7019 *sis, int codec, u32 cmd)
 887 {
 888         unsigned long io = sis->ioport;
 889         unsigned short val = 0xffff;
 890         u16 status;
 891         u16 rdy;
 892         int count;
 893         static const u16 codec_ready[3] = {
 894                 SIS_AC97_STATUS_CODEC_READY,
 895                 SIS_AC97_STATUS_CODEC2_READY,
 896                 SIS_AC97_STATUS_CODEC3_READY,
 897         };
 898
 899         rdy = codec_ready[codec];
 900
 901
 902         /* Get the AC97 semaphore -- software first, so we don't spin
 903          * pounding out IO reads on the hardware semaphore...
 904          */
 905         mutex_lock(&sis->ac97_mutex);
 906
 907         count = 0xffff;
 908         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
 909                 udelay(1);
 910
 911         if (!count)
 912                 goto timeout;
 913
 914         /* ... and wait for any outstanding commands to complete ...
 915          */
 916         count = 0xffff;
 917         do {
 918                 status = inw(io + SIS_AC97_STATUS);
 919                 if ((status & rdy) && !(status & SIS_AC97_STATUS_BUSY))
 920                         break;
 921
 922                 udelay(1);
 923         } while (--count);
 924
 925         if (!count)
 926                 goto timeout_sema;
 927
 928         /* ... before sending our command and waiting for it to finish ...
 929          */
 930         outl(cmd, io + SIS_AC97_CMD);
 931         udelay(10);
 932
 933         count = 0xffff;
 934         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
 935                 udelay(1);
 936
 937         /* ... and reading the results (if any).
 938          */
 939         val = inl(io + SIS_AC97_CMD) >> 16;
 940
 941 timeout_sema:
 942         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
 943 timeout:
 944         mutex_unlock(&sis->ac97_mutex);
 945
 946         if (!count) {
 947                 dev_err(&sis->pci->dev, "ac97 codec %d timeout cmd 0x%08x\n",
 948                                         codec, cmd);
 949         }
 950
 951         return val;
 952 }
 953
 954 static void sis_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 955                                 unsigned short val)
 956 {
 957         static const u32 cmd[3] = {
 958                 SIS_AC97_CMD_CODEC_WRITE,
 959                 SIS_AC97_CMD_CODEC2_WRITE,
 960                 SIS_AC97_CMD_CODEC3_WRITE,
 961         };
 962         sis_ac97_rw(ac97->private_data, ac97->num,
 963                         (val << 16) | (reg << 8) | cmd[ac97->num]);
 964 }
 965
 966 static unsigned short sis_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
 967 {
 968         static const u32 cmd[3] = {
 969                 SIS_AC97_CMD_CODEC_READ,
 970                 SIS_AC97_CMD_CODEC2_READ,
 971                 SIS_AC97_CMD_CODEC3_READ,
 972         };
 973         return sis_ac97_rw(ac97->private_data, ac97->num,
 974                                         (reg << 8) | cmd[ac97->num]);
 975 }
 976
 977 static int sis_mixer_create(struct sis7019 *sis)
 978 {
 979         struct snd_ac97_bus *bus;
 980         struct snd_ac97_template ac97;
 981         static const struct snd_ac97_bus_ops ops = {
 982                 .write = sis_ac97_write,
 983                 .read = sis_ac97_read,
 984         };
 985         int rc;
 986
 987         memset(&ac97, 0, sizeof(ac97));
 988         ac97.private_data = sis;
 989
 990         rc = snd_ac97_bus(sis->card, 0, &ops, NULL, &bus);
 991         if (!rc && sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
 992                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[0]);
 993         ac97.num = 1;
 994         if (!rc && (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT))
 995                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[1]);
 996         ac97.num = 2;
 997         if (!rc && (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT))
 998                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[2]);
 999
1000         /* If we return an error here, then snd_card_free() should
1001          * free up any ac97 codecs that got created, as well as the bus.
1002          */
1003         return rc;
1004 }
1005
1006 static void sis_chip_free(struct snd_card *card)
1007 {
1008         struct sis7019 *sis = card->private_data;
1009
1010         /* Reset the chip, and disable all interrputs.
1011          */
1012         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
1013         udelay(25);
1014         outl(0, sis->ioport + SIS_GCR);
1015         outl(0, sis->ioport + SIS_GIER);
1016
1017         /* Now, free everything we allocated.
1018          */
1019         if (sis->irq >= 0)
1020                 free_irq(sis->irq, sis);
1021 }
1022
1023 static int sis_chip_init(struct sis7019 *sis)
1024 {
1025         unsigned long io = sis->ioport;
1026         void __iomem *ioaddr = sis->ioaddr;
1027         unsigned long timeout;
1028         u16 status;
1029         int count;
1030         int i;
1031
1032         /* Reset the audio controller
1033          */
1034         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
1035         udelay(25);
1036         outl(0, io + SIS_GCR);
1037
1038         /* Get the AC-link semaphore, and reset the codecs
1039          */
1040         count = 0xffff;
1041         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
1042                 udelay(1);
1043
1044         if (!count)
1045                 return -EIO;
1046
1047         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
1048         udelay(250);
1049
1050         count = 0xffff;
1051         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
1052                 udelay(1);
1053
1054         /* Command complete, we can let go of the semaphore now.
1055          */
1056         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
1057         if (!count)
1058                 return -EIO;
1059
1060         /* Now that we've finished the reset, find out what's attached.
1061          * There are some codec/board combinations that take an extremely
1062          * long time to come up. 350+ ms has been observed in the field,
1063          * so we'll give them up to 500ms.
1064          */
1065         sis->codecs_present = 0;
1066         timeout = msecs_to_jiffies(500) + jiffies;
1067         while (time_before_eq(jiffies, timeout)) {
1068                 status = inl(io + SIS_AC97_STATUS);
1069                 if (status & SIS_AC97_STATUS_CODEC_READY)
1070                         sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
1071                 if (status & SIS_AC97_STATUS_CODEC2_READY)
1072                         sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
1073                 if (status & SIS_AC97_STATUS_CODEC3_READY)
1074                         sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
1075
1076                 if (sis->codecs_present == codecs)
1077                         break;
1078
1079                 msleep(1);
1080         }
1081
1082         /* All done, check for errors.
1083          */
1084         if (!sis->codecs_present) {
1085                 dev_err(&sis->pci->dev, "could not find any codecs\n");
1086                 return -EIO;
1087         }
1088
1089         if (sis->codecs_present != codecs) {
1090                 dev_warn(&sis->pci->dev, "missing codecs, found %0x, expected %0x\n",
1091                                          sis->codecs_present, codecs);
1092         }
1093
1094         /* Let the hardware know that the audio driver is alive,
1095          * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
1096          * record channels. We're going to want to use Variable Rate Audio
1097          * for recording, to avoid needlessly resampling from 48kHZ.
1098          */
1099         outl(SIS_AC97_CONF_AUDIO_ALIVE, io + SIS_AC97_CONF);
1100         outl(SIS_AC97_CONF_AUDIO_ALIVE | SIS_AC97_CONF_PCM_LR_ENABLE |
1101                 SIS_AC97_CONF_PCM_CAP_MIC_ENABLE |
1102                 SIS_AC97_CONF_PCM_CAP_LR_ENABLE |
1103                 SIS_AC97_CONF_CODEC_VRA_ENABLE, io + SIS_AC97_CONF);
1104
1105         /* All AC97 PCM slots should be sourced from sub-mixer 0.
1106          */
1107         outl(0, io + SIS_AC97_PSR);
1108
1109         /* There is only one valid DMA setup for a PCI environment.
1110          */
1111         outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
1112
1113         /* Reset the synchronization groups for all of the channels
1114          * to be asynchronous. If we start doing SPDIF or 5.1 sound, etc.
1115          * we'll need to change how we handle these. Until then, we just
1116          * assign sub-mixer 0 to all playback channels, and avoid any
1117          * attenuation on the audio.
1118          */
1119         outl(0, io + SIS_PLAY_SYNC_GROUP_A);
1120         outl(0, io + SIS_PLAY_SYNC_GROUP_B);
1121         outl(0, io + SIS_PLAY_SYNC_GROUP_C);
1122         outl(0, io + SIS_PLAY_SYNC_GROUP_D);
1123         outl(0, io + SIS_MIXER_SYNC_GROUP);
1124
1125         for (i = 0; i < 64; i++) {
1126                 writel(i, SIS_MIXER_START_ADDR(ioaddr, i));
1127                 writel(SIS_MIXER_RIGHT_NO_ATTEN | SIS_MIXER_LEFT_NO_ATTEN |
1128                                 SIS_MIXER_DEST_0, SIS_MIXER_ADDR(ioaddr, i));
1129         }
1130
1131         /* Don't attenuate any audio set for the wave amplifier.
1132          *
1133          * FIXME: Maximum attenuation is set for the music amp, which will
1134          * need to change if we start using the synth engine.
1135          */
1136         outl(0xffff0000, io + SIS_WEVCR);
1137
1138         /* Ensure that the wave engine is in normal operating mode.
1139          */
1140         outl(0, io + SIS_WECCR);
1141
1142         /* Go ahead and enable the DMA interrupts. They won't go live
1143          * until we start a channel.
1144          */
1145         outl(SIS_GIER_AUDIO_PLAY_DMA_IRQ_ENABLE |
1146                 SIS_GIER_AUDIO_RECORD_DMA_IRQ_ENABLE, io + SIS_GIER);
1147
1148         return 0;
1149 }
1150
1151 static int sis_suspend(struct device *dev)
1152 {
1153         struct snd_card *card = dev_get_drvdata(dev);
1154         struct sis7019 *sis = card->private_data;
1155         void __iomem *ioaddr = sis->ioaddr;
1156         int i;
1157
1158         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1159         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1160                 snd_ac97_suspend(sis->ac97[0]);
1161         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1162                 snd_ac97_suspend(sis->ac97[1]);
1163         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1164                 snd_ac97_suspend(sis->ac97[2]);
1165
1166         /* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
1167          */
1168         if (sis->irq >= 0) {
1169                 free_irq(sis->irq, sis);
1170                 sis->irq = -1;
1171         }
1172
1173         /* Save the internal state away
1174          */
1175         for (i = 0; i < 4; i++) {
1176                 memcpy_fromio(sis->suspend_state[i], ioaddr, 4096);
1177                 ioaddr += 4096;
1178         }
1179
1180         return 0;
1181 }
1182
1183 static int sis_resume(struct device *dev)
1184 {
1185         struct pci_dev *pci = to_pci_dev(dev);
1186         struct snd_card *card = dev_get_drvdata(dev);
1187         struct sis7019 *sis = card->private_data;
1188         void __iomem *ioaddr = sis->ioaddr;
1189         int i;
1190
1191         if (sis_chip_init(sis)) {
1192                 dev_err(&pci->dev, "unable to re-init controller\n");
1193                 goto error;
1194         }
1195
1196         if (request_irq(pci->irq, sis_interrupt, IRQF_SHARED,
1197                         KBUILD_MODNAME, sis)) {
1198                 dev_err(&pci->dev, "unable to regain IRQ %d\n", pci->irq);
1199                 goto error;
1200         }
1201
1202         /* Restore saved state, then clear out the page we use for the
1203          * silence buffer.
1204          */
1205         for (i = 0; i < 4; i++) {
1206                 memcpy_toio(ioaddr, sis->suspend_state[i], 4096);
1207                 ioaddr += 4096;
1208         }
1209
1210         memset(sis->suspend_state[0], 0, 4096);
1211
1212         sis->irq = pci->irq;
1213
1214         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1215                 snd_ac97_resume(sis->ac97[0]);
1216         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1217                 snd_ac97_resume(sis->ac97[1]);
1218         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1219                 snd_ac97_resume(sis->ac97[2]);
1220
1221         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1222         return 0;
1223
1224 error:
1225         snd_card_disconnect(card);
1226         return -EIO;
1227 }
1228
1229 static DEFINE_SIMPLE_DEV_PM_OPS(sis_pm, sis_suspend, sis_resume);
1230
1231 static int sis_alloc_suspend(struct sis7019 *sis)
1232 {
1233         int i;
1234
1235         /* We need 16K to store the internal wave engine state during a
1236          * suspend, but we don't need it to be contiguous, so play nice
1237          * with the memory system. We'll also use this area for a silence
1238          * buffer.
1239          */
1240         for (i = 0; i < SIS_SUSPEND_PAGES; i++) {
1241                 sis->suspend_state[i] = devm_kmalloc(&sis->pci->dev, 4096,
1242                                                      GFP_KERNEL);
1243                 if (!sis->suspend_state[i])
1244                         return -ENOMEM;
1245         }
1246         memset(sis->suspend_state[0], 0, 4096);
1247
1248         return 0;
1249 }
1250
1251 static int sis_chip_create(struct snd_card *card,
1252                            struct pci_dev *pci)
1253 {
1254         struct sis7019 *sis = card->private_data;
1255         struct voice *voice;
1256         int rc;
1257         int i;
1258
1259         rc = pcim_enable_device(pci);
1260         if (rc)
1261                 return rc;
1262
1263         rc = dma_set_mask(&pci->dev, DMA_BIT_MASK(30));
1264         if (rc < 0) {
1265                 dev_err(&pci->dev, "architecture does not support 30-bit PCI busmaster DMA");
1266                 return -ENXIO;
1267         }
1268
1269         mutex_init(&sis->ac97_mutex);
1270         spin_lock_init(&sis->voice_lock);
1271         sis->card = card;
1272         sis->pci = pci;
1273         sis->irq = -1;
1274         sis->ioport = pci_resource_start(pci, 0);
1275
1276         rc = pci_request_regions(pci, "SiS7019");
1277         if (rc) {
1278                 dev_err(&pci->dev, "unable request regions\n");
1279                 return rc;
1280         }
1281
1282         sis->ioaddr = devm_ioremap(&pci->dev, pci_resource_start(pci, 1), 0x4000);
1283         if (!sis->ioaddr) {
1284                 dev_err(&pci->dev, "unable to remap MMIO, aborting\n");
1285                 return -EIO;
1286         }
1287
1288         rc = sis_alloc_suspend(sis);
1289         if (rc < 0) {
1290                 dev_err(&pci->dev, "unable to allocate state storage\n");
1291                 return rc;
1292         }
1293
1294         rc = sis_chip_init(sis);
1295         if (rc)
1296                 return rc;
1297         card->private_free = sis_chip_free;
1298
1299         rc = request_irq(pci->irq, sis_interrupt, IRQF_SHARED, KBUILD_MODNAME,
1300                          sis);
1301         if (rc) {
1302                 dev_err(&pci->dev, "unable to allocate irq %d\n", sis->irq);
1303                 return rc;
1304         }
1305
1306         sis->irq = pci->irq;
1307         card->sync_irq = sis->irq;
1308         pci_set_master(pci);
1309
1310         for (i = 0; i < 64; i++) {
1311                 voice = &sis->voices[i];
1312                 voice->num = i;
1313                 voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);
1314                 voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);
1315         }
1316
1317         voice = &sis->capture_voice;
1318         voice->flags = VOICE_CAPTURE;
1319         voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;
1320         voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);
1321
1322         return 0;
1323 }
1324
1325 static int __snd_sis7019_probe(struct pci_dev *pci,
1326                                const struct pci_device_id *pci_id)
1327 {
1328         struct snd_card *card;
1329         struct sis7019 *sis;
1330         int rc;
1331
1332         if (!enable)
1333                 return -ENOENT;
1334
1335         /* The user can specify which codecs should be present so that we
1336          * can wait for them to show up if they are slow to recover from
1337          * the AC97 cold reset. We default to a single codec, the primary.
1338          *
1339          * We assume that SIS_PRIMARY_*_PRESENT matches bits 0-2.
1340          */
1341         codecs &= SIS_PRIMARY_CODEC_PRESENT | SIS_SECONDARY_CODEC_PRESENT |
1342                   SIS_TERTIARY_CODEC_PRESENT;
1343         if (!codecs)
1344                 codecs = SIS_PRIMARY_CODEC_PRESENT;
1345
1346         rc = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
1347                                sizeof(*sis), &card);
1348         if (rc < 0)
1349                 return rc;
1350
1351         strcpy(card->driver, "SiS7019");
1352         strcpy(card->shortname, "SiS7019");
1353         rc = sis_chip_create(card, pci);
1354         if (rc)
1355                 return rc;
1356
1357         sis = card->private_data;
1358
1359         rc = sis_mixer_create(sis);
1360         if (rc)
1361                 return rc;
1362
1363         rc = sis_pcm_create(sis);
1364         if (rc)
1365                 return rc;
1366
1367         snprintf(card->longname, sizeof(card->longname),
1368                         "%s Audio Accelerator with %s at 0x%lx, irq %d",
1369                         card->shortname, snd_ac97_get_short_name(sis->ac97[0]),
1370                         sis->ioport, sis->irq);
1371
1372         rc = snd_card_register(card);
1373         if (rc)
1374                 return rc;
1375
1376         pci_set_drvdata(pci, card);
1377         return 0;
1378 }
1379
1380 static int snd_sis7019_probe(struct pci_dev *pci,
1381                              const struct pci_device_id *pci_id)
1382 {
1383         return snd_card_free_on_error(&pci->dev, __snd_sis7019_probe(pci, pci_id));
1384 }
1385
1386 static struct pci_driver sis7019_driver = {
1387         .name = KBUILD_MODNAME,
1388         .id_table = snd_sis7019_ids,
1389         .probe = snd_sis7019_probe,
1390         .driver = {
1391                 .pm = &sis_pm,
1392         },
1393 };
1394
1395 module_pci_driver(sis7019_driver);