sound/pci/sis7019.c

   1 /*
   2  *  Driver for SiS7019 Audio Accelerator
   3  *
   4  *  Copyright (C) 2004-2007, David Dillow
   5  *  Written by David Dillow <dave@thedillows.org>
   6  *  Inspired by the Trident 4D-WaveDX/NX driver.
   7  *
   8  *  All rights reserved.
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation, version 2.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/pci.h>
  26 #include <linux/time.h>
  27 #include <linux/slab.h>
  28 #include <linux/module.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/delay.h>
  31 #include <sound/core.h>
  32 #include <sound/ac97_codec.h>
  33 #include <sound/initval.h>
  34 #include "sis7019.h"
  35
  36 MODULE_AUTHOR("David Dillow <dave@thedillows.org>");
  37 MODULE_DESCRIPTION("SiS7019");
  38 MODULE_LICENSE("GPL");
  39 MODULE_SUPPORTED_DEVICE("{{SiS,SiS7019 Audio Accelerator}}");
  40
  41 static int index = SNDRV_DEFAULT_IDX1;  /* Index 0-MAX */
  42 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  43 static bool enable = 1;
  44 static int codecs = 1;
  45
  46 module_param(index, int, 0444);
  47 MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
  48 module_param(id, charp, 0444);
  49 MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
  50 module_param(enable, bool, 0444);
  51 MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
  52 module_param(codecs, int, 0444);
  53 MODULE_PARM_DESC(codecs, "Set bit to indicate that codec number is expected to be present (default 1)");
  54
  55 static DEFINE_PCI_DEVICE_TABLE(snd_sis7019_ids) = {
  56         { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
  57         { 0, }
  58 };
  59
  60 MODULE_DEVICE_TABLE(pci, snd_sis7019_ids);
  61
  62 /* There are three timing modes for the voices.
  63  *
  64  * For both playback and capture, when the buffer is one or two periods long,
  65  * we use the hardware's built-in Mid-Loop Interrupt and End-Loop Interrupt
  66  * to let us know when the periods have ended.
  67  *
  68  * When performing playback with more than two periods per buffer, we set
  69  * the "Stop Sample Offset" and tell the hardware to interrupt us when we
  70  * reach it. We then update the offset and continue on until we are
  71  * interrupted for the next period.
  72  *
  73  * Capture channels do not have a SSO, so we allocate a playback channel to
  74  * use as a timer for the capture periods. We use the SSO on the playback
  75  * channel to clock out virtual periods, and adjust the virtual period length
  76  * to maintain synchronization. This algorithm came from the Trident driver.
  77  *
  78  * FIXME: It'd be nice to make use of some of the synth features in the
  79  * hardware, but a woeful lack of documentation is a significant roadblock.
  80  */
  81 struct voice {
  82         u16 flags;
  83 #define         VOICE_IN_USE            1
  84 #define         VOICE_CAPTURE           2
  85 #define         VOICE_SSO_TIMING        4
  86 #define         VOICE_SYNC_TIMING       8
  87         u16 sync_cso;
  88         u16 period_size;
  89         u16 buffer_size;
  90         u16 sync_period_size;
  91         u16 sync_buffer_size;
  92         u32 sso;
  93         u32 vperiod;
  94         struct snd_pcm_substream *substream;
  95         struct voice *timing;
  96         void __iomem *ctrl_base;
  97         void __iomem *wave_base;
  98         void __iomem *sync_base;
  99         int num;
 100 };
 101
 102 /* We need four pages to store our wave parameters during a suspend. If
 103  * we're not doing power management, we still need to allocate a page
 104  * for the silence buffer.
 105  */
 106 #ifdef CONFIG_PM_SLEEP
 107 #define SIS_SUSPEND_PAGES       4
 108 #else
 109 #define SIS_SUSPEND_PAGES       1
 110 #endif
 111
 112 struct sis7019 {
 113         unsigned long ioport;
 114         void __iomem *ioaddr;
 115         int irq;
 116         int codecs_present;
 117
 118         struct pci_dev *pci;
 119         struct snd_pcm *pcm;
 120         struct snd_card *card;
 121         struct snd_ac97 *ac97[3];
 122
 123         /* Protect against more than one thread hitting the AC97
 124          * registers (in a more polite manner than pounding the hardware
 125          * semaphore)
 126          */
 127         struct mutex ac97_mutex;
 128
 129         /* voice_lock protects allocation/freeing of the voice descriptions
 130          */
 131         spinlock_t voice_lock;
 132
 133         struct voice voices[64];
 134         struct voice capture_voice;
 135
 136         /* Allocate pages to store the internal wave state during
 137          * suspends. When we're operating, this can be used as a silence
 138          * buffer for a timing channel.
 139          */
 140         void *suspend_state[SIS_SUSPEND_PAGES];
 141
 142         int silence_users;
 143         dma_addr_t silence_dma_addr;
 144 };
 145
 146 /* These values are also used by the module param 'codecs' to indicate
 147  * which codecs should be present.
 148  */
 149 #define SIS_PRIMARY_CODEC_PRESENT       0x0001
 150 #define SIS_SECONDARY_CODEC_PRESENT     0x0002
 151 #define SIS_TERTIARY_CODEC_PRESENT      0x0004
 152
 153 /* The HW offset parameters (Loop End, Stop Sample, End Sample) have a
 154  * documented range of 8-0xfff8 samples. Given that they are 0-based,
 155  * that places our period/buffer range at 9-0xfff9 samples. That makes the
 156  * max buffer size 0xfff9 samples * 2 channels * 2 bytes per sample, and
 157  * max samples / min samples gives us the max periods in a buffer.
 158  *
 159  * We'll add a constraint upon open that limits the period and buffer sample
 160  * size to values that are legal for the hardware.
 161  */
 162 static struct snd_pcm_hardware sis_playback_hw_info = {
 163         .info = (SNDRV_PCM_INFO_MMAP |
 164                  SNDRV_PCM_INFO_MMAP_VALID |
 165                  SNDRV_PCM_INFO_INTERLEAVED |
 166                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 167                  SNDRV_PCM_INFO_SYNC_START |
 168                  SNDRV_PCM_INFO_RESUME),
 169         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 170                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 171         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS,
 172         .rate_min = 4000,
 173         .rate_max = 48000,
 174         .channels_min = 1,
 175         .channels_max = 2,
 176         .buffer_bytes_max = (0xfff9 * 4),
 177         .period_bytes_min = 9,
 178         .period_bytes_max = (0xfff9 * 4),
 179         .periods_min = 1,
 180         .periods_max = (0xfff9 / 9),
 181 };
 182
 183 static struct snd_pcm_hardware sis_capture_hw_info = {
 184         .info = (SNDRV_PCM_INFO_MMAP |
 185                  SNDRV_PCM_INFO_MMAP_VALID |
 186                  SNDRV_PCM_INFO_INTERLEAVED |
 187                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 188                  SNDRV_PCM_INFO_SYNC_START |
 189                  SNDRV_PCM_INFO_RESUME),
 190         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 191                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 192         .rates = SNDRV_PCM_RATE_48000,
 193         .rate_min = 4000,
 194         .rate_max = 48000,
 195         .channels_min = 1,
 196         .channels_max = 2,
 197         .buffer_bytes_max = (0xfff9 * 4),
 198         .period_bytes_min = 9,
 199         .period_bytes_max = (0xfff9 * 4),
 200         .periods_min = 1,
 201         .periods_max = (0xfff9 / 9),
 202 };
 203
 204 static void sis_update_sso(struct voice *voice, u16 period)
 205 {
 206         void __iomem *base = voice->ctrl_base;
 207
 208         voice->sso += period;
 209         if (voice->sso >= voice->buffer_size)
 210                 voice->sso -= voice->buffer_size;
 211
 212         /* Enforce the documented hardware minimum offset */
 213         if (voice->sso < 8)
 214                 voice->sso = 8;
 215
 216         /* The SSO is in the upper 16 bits of the register. */
 217         writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);
 218 }
 219
 220 static void sis_update_voice(struct voice *voice)
 221 {
 222         if (voice->flags & VOICE_SSO_TIMING) {
 223                 sis_update_sso(voice, voice->period_size);
 224         } else if (voice->flags & VOICE_SYNC_TIMING) {
 225                 int sync;
 226
 227                 /* If we've not hit the end of the virtual period, update
 228                  * our records and keep going.
 229                  */
 230                 if (voice->vperiod > voice->period_size) {
 231                         voice->vperiod -= voice->period_size;
 232                         if (voice->vperiod < voice->period_size)
 233                                 sis_update_sso(voice, voice->vperiod);
 234                         else
 235                                 sis_update_sso(voice, voice->period_size);
 236                         return;
 237                 }
 238
 239                 /* Calculate our relative offset between the target and
 240                  * the actual CSO value. Since we're operating in a loop,
 241                  * if the value is more than half way around, we can
 242                  * consider ourselves wrapped.
 243                  */
 244                 sync = voice->sync_cso;
 245                 sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 246                 if (sync > (voice->sync_buffer_size / 2))
 247                         sync -= voice->sync_buffer_size;
 248
 249                 /* If sync is positive, then we interrupted too early, and
 250                  * we'll need to come back in a few samples and try again.
 251                  * There's a minimum wait, as it takes some time for the DMA
 252                  * engine to startup, etc...
 253                  */
 254                 if (sync > 0) {
 255                         if (sync < 16)
 256                                 sync = 16;
 257                         sis_update_sso(voice, sync);
 258                         return;
 259                 }
 260
 261                 /* Ok, we interrupted right on time, or (hopefully) just
 262                  * a bit late. We'll adjst our next waiting period based
 263                  * on how close we got.
 264                  *
 265                  * We need to stay just behind the actual channel to ensure
 266                  * it really is past a period when we get our interrupt --
 267                  * otherwise we'll fall into the early code above and have
 268                  * a minimum wait time, which makes us quite late here,
 269                  * eating into the user's time to refresh the buffer, esp.
 270                  * if using small periods.
 271                  *
 272                  * If we're less than 9 samples behind, we're on target.
 273                  * Otherwise, shorten the next vperiod by the amount we've
 274                  * been delayed.
 275                  */
 276                 if (sync > -9)
 277                         voice->vperiod = voice->sync_period_size + 1;
 278                 else
 279                         voice->vperiod = voice->sync_period_size + sync + 10;
 280
 281                 if (voice->vperiod < voice->buffer_size) {
 282                         sis_update_sso(voice, voice->vperiod);
 283                         voice->vperiod = 0;
 284                 } else
 285                         sis_update_sso(voice, voice->period_size);
 286
 287                 sync = voice->sync_cso + voice->sync_period_size;
 288                 if (sync >= voice->sync_buffer_size)
 289                         sync -= voice->sync_buffer_size;
 290                 voice->sync_cso = sync;
 291         }
 292
 293         snd_pcm_period_elapsed(voice->substream);
 294 }
 295
 296 static void sis_voice_irq(u32 status, struct voice *voice)
 297 {
 298         int bit;
 299
 300         while (status) {
 301                 bit = __ffs(status);
 302                 status >>= bit + 1;
 303                 voice += bit;
 304                 sis_update_voice(voice);
 305                 voice++;
 306         }
 307 }
 308
 309 static irqreturn_t sis_interrupt(int irq, void *dev)
 310 {
 311         struct sis7019 *sis = dev;
 312         unsigned long io = sis->ioport;
 313         struct voice *voice;
 314         u32 intr, status;
 315
 316         /* We only use the DMA interrupts, and we don't enable any other
 317          * source of interrupts. But, it is possible to see an interrupt
 318          * status that didn't actually interrupt us, so eliminate anything
 319          * we're not expecting to avoid falsely claiming an IRQ, and an
 320          * ensuing endless loop.
 321          */
 322         intr = inl(io + SIS_GISR);
 323         intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 324                 SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 325         if (!intr)
 326                 return IRQ_NONE;
 327
 328         do {
 329                 status = inl(io + SIS_PISR_A);
 330                 if (status) {
 331                         sis_voice_irq(status, sis->voices);
 332                         outl(status, io + SIS_PISR_A);
 333                 }
 334
 335                 status = inl(io + SIS_PISR_B);
 336                 if (status) {
 337                         sis_voice_irq(status, &sis->voices[32]);
 338                         outl(status, io + SIS_PISR_B);
 339                 }
 340
 341                 status = inl(io + SIS_RISR);
 342                 if (status) {
 343                         voice = &sis->capture_voice;
 344                         if (!voice->timing)
 345                                 snd_pcm_period_elapsed(voice->substream);
 346
 347                         outl(status, io + SIS_RISR);
 348                 }
 349
 350                 outl(intr, io + SIS_GISR);
 351                 intr = inl(io + SIS_GISR);
 352                 intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 353                         SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 354         } while (intr);
 355
 356         return IRQ_HANDLED;
 357 }
 358
 359 static u32 sis_rate_to_delta(unsigned int rate)
 360 {
 361         u32 delta;
 362
 363         /* This was copied from the trident driver, but it seems its gotten
 364          * around a bit... nevertheless, it works well.
 365          *
 366          * We special case 44100 and 8000 since rounding with the equation
 367          * does not give us an accurate enough value. For 11025 and 22050
 368          * the equation gives us the best answer. All other frequencies will
 369          * also use the equation. JDW
 370          */
 371         if (rate == 44100)
 372                 delta = 0xeb3;
 373         else if (rate == 8000)
 374                 delta = 0x2ab;
 375         else if (rate == 48000)
 376                 delta = 0x1000;
 377         else
 378                 delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
 379         return delta;
 380 }
 381
 382 static void __sis_map_silence(struct sis7019 *sis)
 383 {
 384         /* Helper function: must hold sis->voice_lock on entry */
 385         if (!sis->silence_users)
 386                 sis->silence_dma_addr = pci_map_single(sis->pci,
 387                                                 sis->suspend_state[0],
 388                                                 4096, PCI_DMA_TODEVICE);
 389         sis->silence_users++;
 390 }
 391
 392 static void __sis_unmap_silence(struct sis7019 *sis)
 393 {
 394         /* Helper function: must hold sis->voice_lock on entry */
 395         sis->silence_users--;
 396         if (!sis->silence_users)
 397                 pci_unmap_single(sis->pci, sis->silence_dma_addr, 4096,
 398                                         PCI_DMA_TODEVICE);
 399 }
 400
 401 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)
 402 {
 403         unsigned long flags;
 404
 405         spin_lock_irqsave(&sis->voice_lock, flags);
 406         if (voice->timing) {
 407                 __sis_unmap_silence(sis);
 408                 voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |
 409                                                 VOICE_SYNC_TIMING);
 410                 voice->timing = NULL;
 411         }
 412         voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);
 413         spin_unlock_irqrestore(&sis->voice_lock, flags);
 414 }
 415
 416 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)
 417 {
 418         /* Must hold the voice_lock on entry */
 419         struct voice *voice;
 420         int i;
 421
 422         for (i = 0; i < 64; i++) {
 423                 voice = &sis->voices[i];
 424                 if (voice->flags & VOICE_IN_USE)
 425                         continue;
 426                 voice->flags |= VOICE_IN_USE;
 427                 goto found_one;
 428         }
 429         voice = NULL;
 430
 431 found_one:
 432         return voice;
 433 }
 434
 435 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)
 436 {
 437         struct voice *voice;
 438         unsigned long flags;
 439
 440         spin_lock_irqsave(&sis->voice_lock, flags);
 441         voice = __sis_alloc_playback_voice(sis);
 442         spin_unlock_irqrestore(&sis->voice_lock, flags);
 443
 444         return voice;
 445 }
 446
 447 static int sis_alloc_timing_voice(struct snd_pcm_substream *substream,
 448                                         struct snd_pcm_hw_params *hw_params)
 449 {
 450         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 451         struct snd_pcm_runtime *runtime = substream->runtime;
 452         struct voice *voice = runtime->private_data;
 453         unsigned int period_size, buffer_size;
 454         unsigned long flags;
 455         int needed;
 456
 457         /* If there are one or two periods per buffer, we don't need a
 458          * timing voice, as we can use the capture channel's interrupts
 459          * to clock out the periods.
 460          */
 461         period_size = params_period_size(hw_params);
 462         buffer_size = params_buffer_size(hw_params);
 463         needed = (period_size != buffer_size &&
 464                         period_size != (buffer_size / 2));
 465
 466         if (needed && !voice->timing) {
 467                 spin_lock_irqsave(&sis->voice_lock, flags);
 468                 voice->timing = __sis_alloc_playback_voice(sis);
 469                 if (voice->timing)
 470                         __sis_map_silence(sis);
 471                 spin_unlock_irqrestore(&sis->voice_lock, flags);
 472                 if (!voice->timing)
 473                         return -ENOMEM;
 474                 voice->timing->substream = substream;
 475         } else if (!needed && voice->timing) {
 476                 sis_free_voice(sis, voice);
 477                 voice->timing = NULL;
 478         }
 479
 480         return 0;
 481 }
 482
 483 static int sis_playback_open(struct snd_pcm_substream *substream)
 484 {
 485         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 486         struct snd_pcm_runtime *runtime = substream->runtime;
 487         struct voice *voice;
 488
 489         voice = sis_alloc_playback_voice(sis);
 490         if (!voice)
 491                 return -EAGAIN;
 492
 493         voice->substream = substream;
 494         runtime->private_data = voice;
 495         runtime->hw = sis_playback_hw_info;
 496         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 497                                                 9, 0xfff9);
 498         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 499                                                 9, 0xfff9);
 500         snd_pcm_set_sync(substream);
 501         return 0;
 502 }
 503
 504 static int sis_substream_close(struct snd_pcm_substream *substream)
 505 {
 506         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 507         struct snd_pcm_runtime *runtime = substream->runtime;
 508         struct voice *voice = runtime->private_data;
 509
 510         sis_free_voice(sis, voice);
 511         return 0;
 512 }
 513
 514 static int sis_playback_hw_params(struct snd_pcm_substream *substream,
 515                                         struct snd_pcm_hw_params *hw_params)
 516 {
 517         return snd_pcm_lib_malloc_pages(substream,
 518                                         params_buffer_bytes(hw_params));
 519 }
 520
 521 static int sis_hw_free(struct snd_pcm_substream *substream)
 522 {
 523         return snd_pcm_lib_free_pages(substream);
 524 }
 525
 526 static int sis_pcm_playback_prepare(struct snd_pcm_substream *substream)
 527 {
 528         struct snd_pcm_runtime *runtime = substream->runtime;
 529         struct voice *voice = runtime->private_data;
 530         void __iomem *ctrl_base = voice->ctrl_base;
 531         void __iomem *wave_base = voice->wave_base;
 532         u32 format, dma_addr, control, sso_eso, delta, reg;
 533         u16 leo;
 534
 535         /* We rely on the PCM core to ensure that the parameters for this
 536          * substream do not change on us while we're programming the HW.
 537          */
 538         format = 0;
 539         if (snd_pcm_format_width(runtime->format) == 8)
 540                 format |= SIS_PLAY_DMA_FORMAT_8BIT;
 541         if (!snd_pcm_format_signed(runtime->format))
 542                 format |= SIS_PLAY_DMA_FORMAT_UNSIGNED;
 543         if (runtime->channels == 1)
 544                 format |= SIS_PLAY_DMA_FORMAT_MONO;
 545
 546         /* The baseline setup is for a single period per buffer, and
 547          * we add bells and whistles as needed from there.
 548          */
 549         dma_addr = runtime->dma_addr;
 550         leo = runtime->buffer_size - 1;
 551         control = leo | SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_LEO;
 552         sso_eso = leo;
 553
 554         if (runtime->period_size == (runtime->buffer_size / 2)) {
 555                 control |= SIS_PLAY_DMA_INTR_AT_MLP;
 556         } else if (runtime->period_size != runtime->buffer_size) {
 557                 voice->flags |= VOICE_SSO_TIMING;
 558                 voice->sso = runtime->period_size - 1;
 559                 voice->period_size = runtime->period_size;
 560                 voice->buffer_size = runtime->buffer_size;
 561
 562                 control &= ~SIS_PLAY_DMA_INTR_AT_LEO;
 563                 control |= SIS_PLAY_DMA_INTR_AT_SSO;
 564                 sso_eso |= (runtime->period_size - 1) << 16;
 565         }
 566
 567         delta = sis_rate_to_delta(runtime->rate);
 568
 569         /* Ok, we're ready to go, set up the channel.
 570          */
 571         writel(format, ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 572         writel(dma_addr, ctrl_base + SIS_PLAY_DMA_BASE);
 573         writel(control, ctrl_base + SIS_PLAY_DMA_CONTROL);
 574         writel(sso_eso, ctrl_base + SIS_PLAY_DMA_SSO_ESO);
 575
 576         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 577                 writel(0, wave_base + reg);
 578
 579         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 580         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 581         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 582                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 583                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 584                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 585
 586         /* Force PCI writes to post. */
 587         readl(ctrl_base);
 588
 589         return 0;
 590 }
 591
 592 static int sis_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 593 {
 594         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 595         unsigned long io = sis->ioport;
 596         struct snd_pcm_substream *s;
 597         struct voice *voice;
 598         void *chip;
 599         int starting;
 600         u32 record = 0;
 601         u32 play[2] = { 0, 0 };
 602
 603         /* No locks needed, as the PCM core will hold the locks on the
 604          * substreams, and the HW will only start/stop the indicated voices
 605          * without changing the state of the others.
 606          */
 607         switch (cmd) {
 608         case SNDRV_PCM_TRIGGER_START:
 609         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 610         case SNDRV_PCM_TRIGGER_RESUME:
 611                 starting = 1;
 612                 break;
 613         case SNDRV_PCM_TRIGGER_STOP:
 614         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 615         case SNDRV_PCM_TRIGGER_SUSPEND:
 616                 starting = 0;
 617                 break;
 618         default:
 619                 return -EINVAL;
 620         }
 621
 622         snd_pcm_group_for_each_entry(s, substream) {
 623                 /* Make sure it is for us... */
 624                 chip = snd_pcm_substream_chip(s);
 625                 if (chip != sis)
 626                         continue;
 627
 628                 voice = s->runtime->private_data;
 629                 if (voice->flags & VOICE_CAPTURE) {
 630                         record |= 1 << voice->num;
 631                         voice = voice->timing;
 632                 }
 633
 634                 /* voice could be NULL if this a recording stream, and it
 635                  * doesn't have an external timing channel.
 636                  */
 637                 if (voice)
 638                         play[voice->num / 32] |= 1 << (voice->num & 0x1f);
 639
 640                 snd_pcm_trigger_done(s, substream);
 641         }
 642
 643         if (starting) {
 644                 if (record)
 645                         outl(record, io + SIS_RECORD_START_REG);
 646                 if (play[0])
 647                         outl(play[0], io + SIS_PLAY_START_A_REG);
 648                 if (play[1])
 649                         outl(play[1], io + SIS_PLAY_START_B_REG);
 650         } else {
 651                 if (record)
 652                         outl(record, io + SIS_RECORD_STOP_REG);
 653                 if (play[0])
 654                         outl(play[0], io + SIS_PLAY_STOP_A_REG);
 655                 if (play[1])
 656                         outl(play[1], io + SIS_PLAY_STOP_B_REG);
 657         }
 658         return 0;
 659 }
 660
 661 static snd_pcm_uframes_t sis_pcm_pointer(struct snd_pcm_substream *substream)
 662 {
 663         struct snd_pcm_runtime *runtime = substream->runtime;
 664         struct voice *voice = runtime->private_data;
 665         u32 cso;
 666
 667         cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 668         cso &= 0xffff;
 669         return cso;
 670 }
 671
 672 static int sis_capture_open(struct snd_pcm_substream *substream)
 673 {
 674         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 675         struct snd_pcm_runtime *runtime = substream->runtime;
 676         struct voice *voice = &sis->capture_voice;
 677         unsigned long flags;
 678
 679         /* FIXME: The driver only supports recording from one channel
 680          * at the moment, but it could support more.
 681          */
 682         spin_lock_irqsave(&sis->voice_lock, flags);
 683         if (voice->flags & VOICE_IN_USE)
 684                 voice = NULL;
 685         else
 686                 voice->flags |= VOICE_IN_USE;
 687         spin_unlock_irqrestore(&sis->voice_lock, flags);
 688
 689         if (!voice)
 690                 return -EAGAIN;
 691
 692         voice->substream = substream;
 693         runtime->private_data = voice;
 694         runtime->hw = sis_capture_hw_info;
 695         runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
 696         snd_pcm_limit_hw_rates(runtime);
 697         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 698                                                 9, 0xfff9);
 699         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 700                                                 9, 0xfff9);
 701         snd_pcm_set_sync(substream);
 702         return 0;
 703 }
 704
 705 static int sis_capture_hw_params(struct snd_pcm_substream *substream,
 706                                         struct snd_pcm_hw_params *hw_params)
 707 {
 708         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 709         int rc;
 710
 711         rc = snd_ac97_set_rate(sis->ac97[0], AC97_PCM_LR_ADC_RATE,
 712                                                 params_rate(hw_params));
 713         if (rc)
 714                 goto out;
 715
 716         rc = snd_pcm_lib_malloc_pages(substream,
 717                                         params_buffer_bytes(hw_params));
 718         if (rc < 0)
 719                 goto out;
 720
 721         rc = sis_alloc_timing_voice(substream, hw_params);
 722
 723 out:
 724         return rc;
 725 }
 726
 727 static void sis_prepare_timing_voice(struct voice *voice,
 728                                         struct snd_pcm_substream *substream)
 729 {
 730         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 731         struct snd_pcm_runtime *runtime = substream->runtime;
 732         struct voice *timing = voice->timing;
 733         void __iomem *play_base = timing->ctrl_base;
 734         void __iomem *wave_base = timing->wave_base;
 735         u16 buffer_size, period_size;
 736         u32 format, control, sso_eso, delta;
 737         u32 vperiod, sso, reg;
 738
 739         /* Set our initial buffer and period as large as we can given a
 740          * single page of silence.
 741          */
 742         buffer_size = 4096 / runtime->channels;
 743         buffer_size /= snd_pcm_format_size(runtime->format, 1);
 744         period_size = buffer_size;
 745
 746         /* Initially, we want to interrupt just a bit behind the end of
 747          * the period we're clocking out. 12 samples seems to give a good
 748          * delay.
 749          *
 750          * We want to spread our interrupts throughout the virtual period,
 751          * so that we don't end up with two interrupts back to back at the
 752          * end -- this helps minimize the effects of any jitter. Adjust our
 753          * clocking period size so that the last period is at least a fourth
 754          * of a full period.
 755          *
 756          * This is all moot if we don't need to use virtual periods.
 757          */
 758         vperiod = runtime->period_size + 12;
 759         if (vperiod > period_size) {
 760                 u16 tail = vperiod % period_size;
 761                 u16 quarter_period = period_size / 4;
 762
 763                 if (tail && tail < quarter_period) {
 764                         u16 loops = vperiod / period_size;
 765
 766                         tail = quarter_period - tail;
 767                         tail += loops - 1;
 768                         tail /= loops;
 769                         period_size -= tail;
 770                 }
 771
 772                 sso = period_size - 1;
 773         } else {
 774                 /* The initial period will fit inside the buffer, so we
 775                  * don't need to use virtual periods -- disable them.
 776                  */
 777                 period_size = runtime->period_size;
 778                 sso = vperiod - 1;
 779                 vperiod = 0;
 780         }
 781
 782         /* The interrupt handler implements the timing synchronization, so
 783          * setup its state.
 784          */
 785         timing->flags |= VOICE_SYNC_TIMING;
 786         timing->sync_base = voice->ctrl_base;
 787         timing->sync_cso = runtime->period_size;
 788         timing->sync_period_size = runtime->period_size;
 789         timing->sync_buffer_size = runtime->buffer_size;
 790         timing->period_size = period_size;
 791         timing->buffer_size = buffer_size;
 792         timing->sso = sso;
 793         timing->vperiod = vperiod;
 794
 795         /* Using unsigned samples with the all-zero silence buffer
 796          * forces the output to the lower rail, killing playback.
 797          * So ignore unsigned vs signed -- it doesn't change the timing.
 798          */
 799         format = 0;
 800         if (snd_pcm_format_width(runtime->format) == 8)
 801                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 802         if (runtime->channels == 1)
 803                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 804
 805         control = timing->buffer_size - 1;
 806         control |= SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_SSO;
 807         sso_eso = timing->buffer_size - 1;
 808         sso_eso |= timing->sso << 16;
 809
 810         delta = sis_rate_to_delta(runtime->rate);
 811
 812         /* We've done the math, now configure the channel.
 813          */
 814         writel(format, play_base + SIS_PLAY_DMA_FORMAT_CSO);
 815         writel(sis->silence_dma_addr, play_base + SIS_PLAY_DMA_BASE);
 816         writel(control, play_base + SIS_PLAY_DMA_CONTROL);
 817         writel(sso_eso, play_base + SIS_PLAY_DMA_SSO_ESO);
 818
 819         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 820                 writel(0, wave_base + reg);
 821
 822         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 823         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 824         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 825                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 826                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 827                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 828 }
 829
 830 static int sis_pcm_capture_prepare(struct snd_pcm_substream *substream)
 831 {
 832         struct snd_pcm_runtime *runtime = substream->runtime;
 833         struct voice *voice = runtime->private_data;
 834         void __iomem *rec_base = voice->ctrl_base;
 835         u32 format, dma_addr, control;
 836         u16 leo;
 837
 838         /* We rely on the PCM core to ensure that the parameters for this
 839          * substream do not change on us while we're programming the HW.
 840          */
 841         format = 0;
 842         if (snd_pcm_format_width(runtime->format) == 8)
 843                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 844         if (!snd_pcm_format_signed(runtime->format))
 845                 format |= SIS_CAPTURE_DMA_FORMAT_UNSIGNED;
 846         if (runtime->channels == 1)
 847                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 848
 849         dma_addr = runtime->dma_addr;
 850         leo = runtime->buffer_size - 1;
 851         control = leo | SIS_CAPTURE_DMA_LOOP;
 852
 853         /* If we've got more than two periods per buffer, then we have
 854          * use a timing voice to clock out the periods. Otherwise, we can
 855          * use the capture channel's interrupts.
 856          */
 857         if (voice->timing) {
 858                 sis_prepare_timing_voice(voice, substream);
 859         } else {
 860                 control |= SIS_CAPTURE_DMA_INTR_AT_LEO;
 861                 if (runtime->period_size != runtime->buffer_size)
 862                         control |= SIS_CAPTURE_DMA_INTR_AT_MLP;
 863         }
 864
 865         writel(format, rec_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 866         writel(dma_addr, rec_base + SIS_CAPTURE_DMA_BASE);
 867         writel(control, rec_base + SIS_CAPTURE_DMA_CONTROL);
 868
 869         /* Force the writes to post. */
 870         readl(rec_base);
 871
 872         return 0;
 873 }
 874
 875 static struct snd_pcm_ops sis_playback_ops = {
 876         .open = sis_playback_open,
 877         .close = sis_substream_close,
 878         .ioctl = snd_pcm_lib_ioctl,
 879         .hw_params = sis_playback_hw_params,
 880         .hw_free = sis_hw_free,
 881         .prepare = sis_pcm_playback_prepare,
 882         .trigger = sis_pcm_trigger,
 883         .pointer = sis_pcm_pointer,
 884 };
 885
 886 static struct snd_pcm_ops sis_capture_ops = {
 887         .open = sis_capture_open,
 888         .close = sis_substream_close,
 889         .ioctl = snd_pcm_lib_ioctl,
 890         .hw_params = sis_capture_hw_params,
 891         .hw_free = sis_hw_free,
 892         .prepare = sis_pcm_capture_prepare,
 893         .trigger = sis_pcm_trigger,
 894         .pointer = sis_pcm_pointer,
 895 };
 896
 897 static int sis_pcm_create(struct sis7019 *sis)
 898 {
 899         struct snd_pcm *pcm;
 900         int rc;
 901
 902         /* We have 64 voices, and the driver currently records from
 903          * only one channel, though that could change in the future.
 904          */
 905         rc = snd_pcm_new(sis->card, "SiS7019", 0, 64, 1, &pcm);
 906         if (rc)
 907                 return rc;
 908
 909         pcm->private_data = sis;
 910         strcpy(pcm->name, "SiS7019");
 911         sis->pcm = pcm;
 912
 913         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &sis_playback_ops);
 914         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &sis_capture_ops);
 915
 916         /* Try to preallocate some memory, but it's not the end of the
 917          * world if this fails.
 918          */
 919         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 920                                 snd_dma_pci_data(sis->pci), 64*1024, 128*1024);
 921
 922         return 0;
 923 }
 924
 925 static unsigned short sis_ac97_rw(struct sis7019 *sis, int codec, u32 cmd)
 926 {
 927         unsigned long io = sis->ioport;
 928         unsigned short val = 0xffff;
 929         u16 status;
 930         u16 rdy;
 931         int count;
 932         static const u16 codec_ready[3] = {
 933                 SIS_AC97_STATUS_CODEC_READY,
 934                 SIS_AC97_STATUS_CODEC2_READY,
 935                 SIS_AC97_STATUS_CODEC3_READY,
 936         };
 937
 938         rdy = codec_ready[codec];
 939
 940
 941         /* Get the AC97 semaphore -- software first, so we don't spin
 942          * pounding out IO reads on the hardware semaphore...
 943          */
 944         mutex_lock(&sis->ac97_mutex);
 945
 946         count = 0xffff;
 947         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
 948                 udelay(1);
 949
 950         if (!count)
 951                 goto timeout;
 952
 953         /* ... and wait for any outstanding commands to complete ...
 954          */
 955         count = 0xffff;
 956         do {
 957                 status = inw(io + SIS_AC97_STATUS);
 958                 if ((status & rdy) && !(status & SIS_AC97_STATUS_BUSY))
 959                         break;
 960
 961                 udelay(1);
 962         } while (--count);
 963
 964         if (!count)
 965                 goto timeout_sema;
 966
 967         /* ... before sending our command and waiting for it to finish ...
 968          */
 969         outl(cmd, io + SIS_AC97_CMD);
 970         udelay(10);
 971
 972         count = 0xffff;
 973         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
 974                 udelay(1);
 975
 976         /* ... and reading the results (if any).
 977          */
 978         val = inl(io + SIS_AC97_CMD) >> 16;
 979
 980 timeout_sema:
 981         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
 982 timeout:
 983         mutex_unlock(&sis->ac97_mutex);
 984
 985         if (!count) {
 986                 dev_err(&sis->pci->dev, "ac97 codec %d timeout cmd 0x%08x\n",
 987                                         codec, cmd);
 988         }
 989
 990         return val;
 991 }
 992
 993 static void sis_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 994                                 unsigned short val)
 995 {
 996         static const u32 cmd[3] = {
 997                 SIS_AC97_CMD_CODEC_WRITE,
 998                 SIS_AC97_CMD_CODEC2_WRITE,
 999                 SIS_AC97_CMD_CODEC3_WRITE,
1000         };
1001         sis_ac97_rw(ac97->private_data, ac97->num,
1002                         (val << 16) | (reg << 8) | cmd[ac97->num]);
1003 }
1004
1005 static unsigned short sis_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
1006 {
1007         static const u32 cmd[3] = {
1008                 SIS_AC97_CMD_CODEC_READ,
1009                 SIS_AC97_CMD_CODEC2_READ,
1010                 SIS_AC97_CMD_CODEC3_READ,
1011         };
1012         return sis_ac97_rw(ac97->private_data, ac97->num,
1013                                         (reg << 8) | cmd[ac97->num]);
1014 }
1015
1016 static int sis_mixer_create(struct sis7019 *sis)
1017 {
1018         struct snd_ac97_bus *bus;
1019         struct snd_ac97_template ac97;
1020         static struct snd_ac97_bus_ops ops = {
1021                 .write = sis_ac97_write,
1022                 .read = sis_ac97_read,
1023         };
1024         int rc;
1025
1026         memset(&ac97, 0, sizeof(ac97));
1027         ac97.private_data = sis;
1028
1029         rc = snd_ac97_bus(sis->card, 0, &ops, NULL, &bus);
1030         if (!rc && sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1031                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[0]);
1032         ac97.num = 1;
1033         if (!rc && (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT))
1034                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[1]);
1035         ac97.num = 2;
1036         if (!rc && (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT))
1037                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[2]);
1038
1039         /* If we return an error here, then snd_card_free() should
1040          * free up any ac97 codecs that got created, as well as the bus.
1041          */
1042         return rc;
1043 }
1044
1045 static void sis_free_suspend(struct sis7019 *sis)
1046 {
1047         int i;
1048
1049         for (i = 0; i < SIS_SUSPEND_PAGES; i++)
1050                 kfree(sis->suspend_state[i]);
1051 }
1052
1053 static int sis_chip_free(struct sis7019 *sis)
1054 {
1055         /* Reset the chip, and disable all interrputs.
1056          */
1057         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
1058         udelay(25);
1059         outl(0, sis->ioport + SIS_GCR);
1060         outl(0, sis->ioport + SIS_GIER);
1061
1062         /* Now, free everything we allocated.
1063          */
1064         if (sis->irq >= 0)
1065                 free_irq(sis->irq, sis);
1066
1067         if (sis->ioaddr)
1068                 iounmap(sis->ioaddr);
1069
1070         pci_release_regions(sis->pci);
1071         pci_disable_device(sis->pci);
1072
1073         sis_free_suspend(sis);
1074         return 0;
1075 }
1076
1077 static int sis_dev_free(struct snd_device *dev)
1078 {
1079         struct sis7019 *sis = dev->device_data;
1080         return sis_chip_free(sis);
1081 }
1082
1083 static int sis_chip_init(struct sis7019 *sis)
1084 {
1085         unsigned long io = sis->ioport;
1086         void __iomem *ioaddr = sis->ioaddr;
1087         unsigned long timeout;
1088         u16 status;
1089         int count;
1090         int i;
1091
1092         /* Reset the audio controller
1093          */
1094         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
1095         udelay(25);
1096         outl(0, io + SIS_GCR);
1097
1098         /* Get the AC-link semaphore, and reset the codecs
1099          */
1100         count = 0xffff;
1101         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
1102                 udelay(1);
1103
1104         if (!count)
1105                 return -EIO;
1106
1107         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
1108         udelay(250);
1109
1110         count = 0xffff;
1111         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
1112                 udelay(1);
1113
1114         /* Command complete, we can let go of the semaphore now.
1115          */
1116         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
1117         if (!count)
1118                 return -EIO;
1119
1120         /* Now that we've finished the reset, find out what's attached.
1121          * There are some codec/board combinations that take an extremely
1122          * long time to come up. 350+ ms has been observed in the field,
1123          * so we'll give them up to 500ms.
1124          */
1125         sis->codecs_present = 0;
1126         timeout = msecs_to_jiffies(500) + jiffies;
1127         while (time_before_eq(jiffies, timeout)) {
1128                 status = inl(io + SIS_AC97_STATUS);
1129                 if (status & SIS_AC97_STATUS_CODEC_READY)
1130                         sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
1131                 if (status & SIS_AC97_STATUS_CODEC2_READY)
1132                         sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
1133                 if (status & SIS_AC97_STATUS_CODEC3_READY)
1134                         sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
1135
1136                 if (sis->codecs_present == codecs)
1137                         break;
1138
1139                 msleep(1);
1140         }
1141
1142         /* All done, check for errors.
1143          */
1144         if (!sis->codecs_present) {
1145                 dev_err(&sis->pci->dev, "could not find any codecs\n");
1146                 return -EIO;
1147         }
1148
1149         if (sis->codecs_present != codecs) {
1150                 dev_warn(&sis->pci->dev, "missing codecs, found %0x, expected %0x\n",
1151                                          sis->codecs_present, codecs);
1152         }
1153
1154         /* Let the hardware know that the audio driver is alive,
1155          * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
1156          * record channels. We're going to want to use Variable Rate Audio
1157          * for recording, to avoid needlessly resampling from 48kHZ.
1158          */
1159         outl(SIS_AC97_CONF_AUDIO_ALIVE, io + SIS_AC97_CONF);
1160         outl(SIS_AC97_CONF_AUDIO_ALIVE | SIS_AC97_CONF_PCM_LR_ENABLE |
1161                 SIS_AC97_CONF_PCM_CAP_MIC_ENABLE |
1162                 SIS_AC97_CONF_PCM_CAP_LR_ENABLE |
1163                 SIS_AC97_CONF_CODEC_VRA_ENABLE, io + SIS_AC97_CONF);
1164
1165         /* All AC97 PCM slots should be sourced from sub-mixer 0.
1166          */
1167         outl(0, io + SIS_AC97_PSR);
1168
1169         /* There is only one valid DMA setup for a PCI environment.
1170          */
1171         outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
1172
1173         /* Reset the synchronization groups for all of the channels
1174          * to be asynchronous. If we start doing SPDIF or 5.1 sound, etc.
1175          * we'll need to change how we handle these. Until then, we just
1176          * assign sub-mixer 0 to all playback channels, and avoid any
1177          * attenuation on the audio.
1178          */
1179         outl(0, io + SIS_PLAY_SYNC_GROUP_A);
1180         outl(0, io + SIS_PLAY_SYNC_GROUP_B);
1181         outl(0, io + SIS_PLAY_SYNC_GROUP_C);
1182         outl(0, io + SIS_PLAY_SYNC_GROUP_D);
1183         outl(0, io + SIS_MIXER_SYNC_GROUP);
1184
1185         for (i = 0; i < 64; i++) {
1186                 writel(i, SIS_MIXER_START_ADDR(ioaddr, i));
1187                 writel(SIS_MIXER_RIGHT_NO_ATTEN | SIS_MIXER_LEFT_NO_ATTEN |
1188                                 SIS_MIXER_DEST_0, SIS_MIXER_ADDR(ioaddr, i));
1189         }
1190
1191         /* Don't attenuate any audio set for the wave amplifier.
1192          *
1193          * FIXME: Maximum attenuation is set for the music amp, which will
1194          * need to change if we start using the synth engine.
1195          */
1196         outl(0xffff0000, io + SIS_WEVCR);
1197
1198         /* Ensure that the wave engine is in normal operating mode.
1199          */
1200         outl(0, io + SIS_WECCR);
1201
1202         /* Go ahead and enable the DMA interrupts. They won't go live
1203          * until we start a channel.
1204          */
1205         outl(SIS_GIER_AUDIO_PLAY_DMA_IRQ_ENABLE |
1206                 SIS_GIER_AUDIO_RECORD_DMA_IRQ_ENABLE, io + SIS_GIER);
1207
1208         return 0;
1209 }
1210
1211 #ifdef CONFIG_PM_SLEEP
1212 static int sis_suspend(struct device *dev)
1213 {
1214         struct pci_dev *pci = to_pci_dev(dev);
1215         struct snd_card *card = dev_get_drvdata(dev);
1216         struct sis7019 *sis = card->private_data;
1217         void __iomem *ioaddr = sis->ioaddr;
1218         int i;
1219
1220         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1221         snd_pcm_suspend_all(sis->pcm);
1222         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1223                 snd_ac97_suspend(sis->ac97[0]);
1224         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1225                 snd_ac97_suspend(sis->ac97[1]);
1226         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1227                 snd_ac97_suspend(sis->ac97[2]);
1228
1229         /* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
1230          */
1231         if (sis->irq >= 0) {
1232                 free_irq(sis->irq, sis);
1233                 sis->irq = -1;
1234         }
1235
1236         /* Save the internal state away
1237          */
1238         for (i = 0; i < 4; i++) {
1239                 memcpy_fromio(sis->suspend_state[i], ioaddr, 4096);
1240                 ioaddr += 4096;
1241         }
1242
1243         pci_disable_device(pci);
1244         pci_save_state(pci);
1245         pci_set_power_state(pci, PCI_D3hot);
1246         return 0;
1247 }
1248
1249 static int sis_resume(struct device *dev)
1250 {
1251         struct pci_dev *pci = to_pci_dev(dev);
1252         struct snd_card *card = dev_get_drvdata(dev);
1253         struct sis7019 *sis = card->private_data;
1254         void __iomem *ioaddr = sis->ioaddr;
1255         int i;
1256
1257         pci_set_power_state(pci, PCI_D0);
1258         pci_restore_state(pci);
1259
1260         if (pci_enable_device(pci) < 0) {
1261                 dev_err(&pci->dev, "unable to re-enable device\n");
1262                 goto error;
1263         }
1264
1265         if (sis_chip_init(sis)) {
1266                 dev_err(&pci->dev, "unable to re-init controller\n");
1267                 goto error;
1268         }
1269
1270         if (request_irq(pci->irq, sis_interrupt, IRQF_SHARED,
1271                         KBUILD_MODNAME, sis)) {
1272                 dev_err(&pci->dev, "unable to regain IRQ %d\n", pci->irq);
1273                 goto error;
1274         }
1275
1276         /* Restore saved state, then clear out the page we use for the
1277          * silence buffer.
1278          */
1279         for (i = 0; i < 4; i++) {
1280                 memcpy_toio(ioaddr, sis->suspend_state[i], 4096);
1281                 ioaddr += 4096;
1282         }
1283
1284         memset(sis->suspend_state[0], 0, 4096);
1285
1286         sis->irq = pci->irq;
1287         pci_set_master(pci);
1288
1289         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1290                 snd_ac97_resume(sis->ac97[0]);
1291         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1292                 snd_ac97_resume(sis->ac97[1]);
1293         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1294                 snd_ac97_resume(sis->ac97[2]);
1295
1296         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1297         return 0;
1298
1299 error:
1300         snd_card_disconnect(card);
1301         return -EIO;
1302 }
1303
1304 static SIMPLE_DEV_PM_OPS(sis_pm, sis_suspend, sis_resume);
1305 #define SIS_PM_OPS      &sis_pm
1306 #else
1307 #define SIS_PM_OPS      NULL
1308 #endif /* CONFIG_PM_SLEEP */
1309
1310 static int sis_alloc_suspend(struct sis7019 *sis)
1311 {
1312         int i;
1313
1314         /* We need 16K to store the internal wave engine state during a
1315          * suspend, but we don't need it to be contiguous, so play nice
1316          * with the memory system. We'll also use this area for a silence
1317          * buffer.
1318          */
1319         for (i = 0; i < SIS_SUSPEND_PAGES; i++) {
1320                 sis->suspend_state[i] = kmalloc(4096, GFP_KERNEL);
1321                 if (!sis->suspend_state[i])
1322                         return -ENOMEM;
1323         }
1324         memset(sis->suspend_state[0], 0, 4096);
1325
1326         return 0;
1327 }
1328
1329 static int sis_chip_create(struct snd_card *card,
1330                            struct pci_dev *pci)
1331 {
1332         struct sis7019 *sis = card->private_data;
1333         struct voice *voice;
1334         static struct snd_device_ops ops = {
1335                 .dev_free = sis_dev_free,
1336         };
1337         int rc;
1338         int i;
1339
1340         rc = pci_enable_device(pci);
1341         if (rc)
1342                 goto error_out;
1343
1344         rc = pci_set_dma_mask(pci, DMA_BIT_MASK(30));
1345         if (rc < 0) {
1346                 dev_err(&pci->dev, "architecture does not support 30-bit PCI busmaster DMA");
1347                 goto error_out_enabled;
1348         }
1349
1350         memset(sis, 0, sizeof(*sis));
1351         mutex_init(&sis->ac97_mutex);
1352         spin_lock_init(&sis->voice_lock);
1353         sis->card = card;
1354         sis->pci = pci;
1355         sis->irq = -1;
1356         sis->ioport = pci_resource_start(pci, 0);
1357
1358         rc = pci_request_regions(pci, "SiS7019");
1359         if (rc) {
1360                 dev_err(&pci->dev, "unable request regions\n");
1361                 goto error_out_enabled;
1362         }
1363
1364         rc = -EIO;
1365         sis->ioaddr = ioremap_nocache(pci_resource_start(pci, 1), 0x4000);
1366         if (!sis->ioaddr) {
1367                 dev_err(&pci->dev, "unable to remap MMIO, aborting\n");
1368                 goto error_out_cleanup;
1369         }
1370
1371         rc = sis_alloc_suspend(sis);
1372         if (rc < 0) {
1373                 dev_err(&pci->dev, "unable to allocate state storage\n");
1374                 goto error_out_cleanup;
1375         }
1376
1377         rc = sis_chip_init(sis);
1378         if (rc)
1379                 goto error_out_cleanup;
1380
1381         rc = request_irq(pci->irq, sis_interrupt, IRQF_SHARED, KBUILD_MODNAME,
1382                          sis);
1383         if (rc) {
1384                 dev_err(&pci->dev, "unable to allocate irq %d\n", sis->irq);
1385                 goto error_out_cleanup;
1386         }
1387
1388         sis->irq = pci->irq;
1389         pci_set_master(pci);
1390
1391         for (i = 0; i < 64; i++) {
1392                 voice = &sis->voices[i];
1393                 voice->num = i;
1394                 voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);
1395                 voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);
1396         }
1397
1398         voice = &sis->capture_voice;
1399         voice->flags = VOICE_CAPTURE;
1400         voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;
1401         voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);
1402
1403         rc = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sis, &ops);
1404         if (rc)
1405                 goto error_out_cleanup;
1406
1407         snd_card_set_dev(card, &pci->dev);
1408
1409         return 0;
1410
1411 error_out_cleanup:
1412         sis_chip_free(sis);
1413
1414 error_out_enabled:
1415         pci_disable_device(pci);
1416
1417 error_out:
1418         return rc;
1419 }
1420
1421 static int snd_sis7019_probe(struct pci_dev *pci,
1422                              const struct pci_device_id *pci_id)
1423 {
1424         struct snd_card *card;
1425         struct sis7019 *sis;
1426         int rc;
1427
1428         rc = -ENOENT;
1429         if (!enable)
1430                 goto error_out;
1431
1432         /* The user can specify which codecs should be present so that we
1433          * can wait for them to show up if they are slow to recover from
1434          * the AC97 cold reset. We default to a single codec, the primary.
1435          *
1436          * We assume that SIS_PRIMARY_*_PRESENT matches bits 0-2.
1437          */
1438         codecs &= SIS_PRIMARY_CODEC_PRESENT | SIS_SECONDARY_CODEC_PRESENT |
1439                   SIS_TERTIARY_CODEC_PRESENT;
1440         if (!codecs)
1441                 codecs = SIS_PRIMARY_CODEC_PRESENT;
1442
1443         rc = snd_card_create(index, id, THIS_MODULE, sizeof(*sis), &card);
1444         if (rc < 0)
1445                 goto error_out;
1446
1447         strcpy(card->driver, "SiS7019");
1448         strcpy(card->shortname, "SiS7019");
1449         rc = sis_chip_create(card, pci);
1450         if (rc)
1451                 goto card_error_out;
1452
1453         sis = card->private_data;
1454
1455         rc = sis_mixer_create(sis);
1456         if (rc)
1457                 goto card_error_out;
1458
1459         rc = sis_pcm_create(sis);
1460         if (rc)
1461                 goto card_error_out;
1462
1463         snprintf(card->longname, sizeof(card->longname),
1464                         "%s Audio Accelerator with %s at 0x%lx, irq %d",
1465                         card->shortname, snd_ac97_get_short_name(sis->ac97[0]),
1466                         sis->ioport, sis->irq);
1467
1468         rc = snd_card_register(card);
1469         if (rc)
1470                 goto card_error_out;
1471
1472         pci_set_drvdata(pci, card);
1473         return 0;
1474
1475 card_error_out:
1476         snd_card_free(card);
1477
1478 error_out:
1479         return rc;
1480 }
1481
1482 static void snd_sis7019_remove(struct pci_dev *pci)
1483 {
1484         snd_card_free(pci_get_drvdata(pci));
1485 }
1486
1487 static struct pci_driver sis7019_driver = {
1488         .name = KBUILD_MODNAME,
1489         .id_table = snd_sis7019_ids,
1490         .probe = snd_sis7019_probe,
1491         .remove = snd_sis7019_remove,
1492         .driver = {
1493                 .pm = SIS_PM_OPS,
1494         },
1495 };
1496
1497 module_pci_driver(sis7019_driver);