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/moduleparam.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 int enable = 1;
  44
  45 module_param(index, int, 0444);
  46 MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
  47 module_param(id, charp, 0444);
  48 MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
  49 module_param(enable, bool, 0444);
  50 MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
  51
  52 static DEFINE_PCI_DEVICE_TABLE(snd_sis7019_ids) = {
  53         { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
  54         { 0, }
  55 };
  56
  57 MODULE_DEVICE_TABLE(pci, snd_sis7019_ids);
  58
  59 /* There are three timing modes for the voices.
  60  *
  61  * For both playback and capture, when the buffer is one or two periods long,
  62  * we use the hardware's built-in Mid-Loop Interrupt and End-Loop Interrupt
  63  * to let us know when the periods have ended.
  64  *
  65  * When performing playback with more than two periods per buffer, we set
  66  * the "Stop Sample Offset" and tell the hardware to interrupt us when we
  67  * reach it. We then update the offset and continue on until we are
  68  * interrupted for the next period.
  69  *
  70  * Capture channels do not have a SSO, so we allocate a playback channel to
  71  * use as a timer for the capture periods. We use the SSO on the playback
  72  * channel to clock out virtual periods, and adjust the virtual period length
  73  * to maintain synchronization. This algorithm came from the Trident driver.
  74  *
  75  * FIXME: It'd be nice to make use of some of the synth features in the
  76  * hardware, but a woeful lack of documentation is a significant roadblock.
  77  */
  78 struct voice {
  79         u16 flags;
  80 #define         VOICE_IN_USE            1
  81 #define         VOICE_CAPTURE           2
  82 #define         VOICE_SSO_TIMING        4
  83 #define         VOICE_SYNC_TIMING       8
  84         u16 sync_cso;
  85         u16 period_size;
  86         u16 buffer_size;
  87         u16 sync_period_size;
  88         u16 sync_buffer_size;
  89         u32 sso;
  90         u32 vperiod;
  91         struct snd_pcm_substream *substream;
  92         struct voice *timing;
  93         void __iomem *ctrl_base;
  94         void __iomem *wave_base;
  95         void __iomem *sync_base;
  96         int num;
  97 };
  98
  99 /* We need four pages to store our wave parameters during a suspend. If
 100  * we're not doing power management, we still need to allocate a page
 101  * for the silence buffer.
 102  */
 103 #ifdef CONFIG_PM
 104 #define SIS_SUSPEND_PAGES       4
 105 #else
 106 #define SIS_SUSPEND_PAGES       1
 107 #endif
 108
 109 struct sis7019 {
 110         unsigned long ioport;
 111         void __iomem *ioaddr;
 112         int irq;
 113         int codecs_present;
 114
 115         struct pci_dev *pci;
 116         struct snd_pcm *pcm;
 117         struct snd_card *card;
 118         struct snd_ac97 *ac97[3];
 119
 120         /* Protect against more than one thread hitting the AC97
 121          * registers (in a more polite manner than pounding the hardware
 122          * semaphore)
 123          */
 124         struct mutex ac97_mutex;
 125
 126         /* voice_lock protects allocation/freeing of the voice descriptions
 127          */
 128         spinlock_t voice_lock;
 129
 130         struct voice voices[64];
 131         struct voice capture_voice;
 132
 133         /* Allocate pages to store the internal wave state during
 134          * suspends. When we're operating, this can be used as a silence
 135          * buffer for a timing channel.
 136          */
 137         void *suspend_state[SIS_SUSPEND_PAGES];
 138
 139         int silence_users;
 140         dma_addr_t silence_dma_addr;
 141 };
 142
 143 #define SIS_PRIMARY_CODEC_PRESENT       0x0001
 144 #define SIS_SECONDARY_CODEC_PRESENT     0x0002
 145 #define SIS_TERTIARY_CODEC_PRESENT      0x0004
 146
 147 /* The HW offset parameters (Loop End, Stop Sample, End Sample) have a
 148  * documented range of 8-0xfff8 samples. Given that they are 0-based,
 149  * that places our period/buffer range at 9-0xfff9 samples. That makes the
 150  * max buffer size 0xfff9 samples * 2 channels * 2 bytes per sample, and
 151  * max samples / min samples gives us the max periods in a buffer.
 152  *
 153  * We'll add a constraint upon open that limits the period and buffer sample
 154  * size to values that are legal for the hardware.
 155  */
 156 static struct snd_pcm_hardware sis_playback_hw_info = {
 157         .info = (SNDRV_PCM_INFO_MMAP |
 158                  SNDRV_PCM_INFO_MMAP_VALID |
 159                  SNDRV_PCM_INFO_INTERLEAVED |
 160                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 161                  SNDRV_PCM_INFO_SYNC_START |
 162                  SNDRV_PCM_INFO_RESUME),
 163         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 164                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 165         .rates = SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_CONTINUOUS,
 166         .rate_min = 4000,
 167         .rate_max = 48000,
 168         .channels_min = 1,
 169         .channels_max = 2,
 170         .buffer_bytes_max = (0xfff9 * 4),
 171         .period_bytes_min = 9,
 172         .period_bytes_max = (0xfff9 * 4),
 173         .periods_min = 1,
 174         .periods_max = (0xfff9 / 9),
 175 };
 176
 177 static struct snd_pcm_hardware sis_capture_hw_info = {
 178         .info = (SNDRV_PCM_INFO_MMAP |
 179                  SNDRV_PCM_INFO_MMAP_VALID |
 180                  SNDRV_PCM_INFO_INTERLEAVED |
 181                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 182                  SNDRV_PCM_INFO_SYNC_START |
 183                  SNDRV_PCM_INFO_RESUME),
 184         .formats = (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
 185                     SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE),
 186         .rates = SNDRV_PCM_RATE_48000,
 187         .rate_min = 4000,
 188         .rate_max = 48000,
 189         .channels_min = 1,
 190         .channels_max = 2,
 191         .buffer_bytes_max = (0xfff9 * 4),
 192         .period_bytes_min = 9,
 193         .period_bytes_max = (0xfff9 * 4),
 194         .periods_min = 1,
 195         .periods_max = (0xfff9 / 9),
 196 };
 197
 198 static void sis_update_sso(struct voice *voice, u16 period)
 199 {
 200         void __iomem *base = voice->ctrl_base;
 201
 202         voice->sso += period;
 203         if (voice->sso >= voice->buffer_size)
 204                 voice->sso -= voice->buffer_size;
 205
 206         /* Enforce the documented hardware minimum offset */
 207         if (voice->sso < 8)
 208                 voice->sso = 8;
 209
 210         /* The SSO is in the upper 16 bits of the register. */
 211         writew(voice->sso & 0xffff, base + SIS_PLAY_DMA_SSO_ESO + 2);
 212 }
 213
 214 static void sis_update_voice(struct voice *voice)
 215 {
 216         if (voice->flags & VOICE_SSO_TIMING) {
 217                 sis_update_sso(voice, voice->period_size);
 218         } else if (voice->flags & VOICE_SYNC_TIMING) {
 219                 int sync;
 220
 221                 /* If we've not hit the end of the virtual period, update
 222                  * our records and keep going.
 223                  */
 224                 if (voice->vperiod > voice->period_size) {
 225                         voice->vperiod -= voice->period_size;
 226                         if (voice->vperiod < voice->period_size)
 227                                 sis_update_sso(voice, voice->vperiod);
 228                         else
 229                                 sis_update_sso(voice, voice->period_size);
 230                         return;
 231                 }
 232
 233                 /* Calculate our relative offset between the target and
 234                  * the actual CSO value. Since we're operating in a loop,
 235                  * if the value is more than half way around, we can
 236                  * consider ourselves wrapped.
 237                  */
 238                 sync = voice->sync_cso;
 239                 sync -= readw(voice->sync_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 240                 if (sync > (voice->sync_buffer_size / 2))
 241                         sync -= voice->sync_buffer_size;
 242
 243                 /* If sync is positive, then we interrupted too early, and
 244                  * we'll need to come back in a few samples and try again.
 245                  * There's a minimum wait, as it takes some time for the DMA
 246                  * engine to startup, etc...
 247                  */
 248                 if (sync > 0) {
 249                         if (sync < 16)
 250                                 sync = 16;
 251                         sis_update_sso(voice, sync);
 252                         return;
 253                 }
 254
 255                 /* Ok, we interrupted right on time, or (hopefully) just
 256                  * a bit late. We'll adjst our next waiting period based
 257                  * on how close we got.
 258                  *
 259                  * We need to stay just behind the actual channel to ensure
 260                  * it really is past a period when we get our interrupt --
 261                  * otherwise we'll fall into the early code above and have
 262                  * a minimum wait time, which makes us quite late here,
 263                  * eating into the user's time to refresh the buffer, esp.
 264                  * if using small periods.
 265                  *
 266                  * If we're less than 9 samples behind, we're on target.
 267                  * Otherwise, shorten the next vperiod by the amount we've
 268                  * been delayed.
 269                  */
 270                 if (sync > -9)
 271                         voice->vperiod = voice->sync_period_size + 1;
 272                 else
 273                         voice->vperiod = voice->sync_period_size + sync + 10;
 274
 275                 if (voice->vperiod < voice->buffer_size) {
 276                         sis_update_sso(voice, voice->vperiod);
 277                         voice->vperiod = 0;
 278                 } else
 279                         sis_update_sso(voice, voice->period_size);
 280
 281                 sync = voice->sync_cso + voice->sync_period_size;
 282                 if (sync >= voice->sync_buffer_size)
 283                         sync -= voice->sync_buffer_size;
 284                 voice->sync_cso = sync;
 285         }
 286
 287         snd_pcm_period_elapsed(voice->substream);
 288 }
 289
 290 static void sis_voice_irq(u32 status, struct voice *voice)
 291 {
 292         int bit;
 293
 294         while (status) {
 295                 bit = __ffs(status);
 296                 status >>= bit + 1;
 297                 voice += bit;
 298                 sis_update_voice(voice);
 299                 voice++;
 300         }
 301 }
 302
 303 static irqreturn_t sis_interrupt(int irq, void *dev)
 304 {
 305         struct sis7019 *sis = dev;
 306         unsigned long io = sis->ioport;
 307         struct voice *voice;
 308         u32 intr, status;
 309
 310         /* We only use the DMA interrupts, and we don't enable any other
 311          * source of interrupts. But, it is possible to see an interupt
 312          * status that didn't actually interrupt us, so eliminate anything
 313          * we're not expecting to avoid falsely claiming an IRQ, and an
 314          * ensuing endless loop.
 315          */
 316         intr = inl(io + SIS_GISR);
 317         intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 318                 SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 319         if (!intr)
 320                 return IRQ_NONE;
 321
 322         do {
 323                 status = inl(io + SIS_PISR_A);
 324                 if (status) {
 325                         sis_voice_irq(status, sis->voices);
 326                         outl(status, io + SIS_PISR_A);
 327                 }
 328
 329                 status = inl(io + SIS_PISR_B);
 330                 if (status) {
 331                         sis_voice_irq(status, &sis->voices[32]);
 332                         outl(status, io + SIS_PISR_B);
 333                 }
 334
 335                 status = inl(io + SIS_RISR);
 336                 if (status) {
 337                         voice = &sis->capture_voice;
 338                         if (!voice->timing)
 339                                 snd_pcm_period_elapsed(voice->substream);
 340
 341                         outl(status, io + SIS_RISR);
 342                 }
 343
 344                 outl(intr, io + SIS_GISR);
 345                 intr = inl(io + SIS_GISR);
 346                 intr &= SIS_GISR_AUDIO_PLAY_DMA_IRQ_STATUS |
 347                         SIS_GISR_AUDIO_RECORD_DMA_IRQ_STATUS;
 348         } while (intr);
 349
 350         return IRQ_HANDLED;
 351 }
 352
 353 static u32 sis_rate_to_delta(unsigned int rate)
 354 {
 355         u32 delta;
 356
 357         /* This was copied from the trident driver, but it seems its gotten
 358          * around a bit... nevertheless, it works well.
 359          *
 360          * We special case 44100 and 8000 since rounding with the equation
 361          * does not give us an accurate enough value. For 11025 and 22050
 362          * the equation gives us the best answer. All other frequencies will
 363          * also use the equation. JDW
 364          */
 365         if (rate == 44100)
 366                 delta = 0xeb3;
 367         else if (rate == 8000)
 368                 delta = 0x2ab;
 369         else if (rate == 48000)
 370                 delta = 0x1000;
 371         else
 372                 delta = (((rate << 12) + 24000) / 48000) & 0x0000ffff;
 373         return delta;
 374 }
 375
 376 static void __sis_map_silence(struct sis7019 *sis)
 377 {
 378         /* Helper function: must hold sis->voice_lock on entry */
 379         if (!sis->silence_users)
 380                 sis->silence_dma_addr = pci_map_single(sis->pci,
 381                                                 sis->suspend_state[0],
 382                                                 4096, PCI_DMA_TODEVICE);
 383         sis->silence_users++;
 384 }
 385
 386 static void __sis_unmap_silence(struct sis7019 *sis)
 387 {
 388         /* Helper function: must hold sis->voice_lock on entry */
 389         sis->silence_users--;
 390         if (!sis->silence_users)
 391                 pci_unmap_single(sis->pci, sis->silence_dma_addr, 4096,
 392                                         PCI_DMA_TODEVICE);
 393 }
 394
 395 static void sis_free_voice(struct sis7019 *sis, struct voice *voice)
 396 {
 397         unsigned long flags;
 398
 399         spin_lock_irqsave(&sis->voice_lock, flags);
 400         if (voice->timing) {
 401                 __sis_unmap_silence(sis);
 402                 voice->timing->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING |
 403                                                 VOICE_SYNC_TIMING);
 404                 voice->timing = NULL;
 405         }
 406         voice->flags &= ~(VOICE_IN_USE | VOICE_SSO_TIMING | VOICE_SYNC_TIMING);
 407         spin_unlock_irqrestore(&sis->voice_lock, flags);
 408 }
 409
 410 static struct voice *__sis_alloc_playback_voice(struct sis7019 *sis)
 411 {
 412         /* Must hold the voice_lock on entry */
 413         struct voice *voice;
 414         int i;
 415
 416         for (i = 0; i < 64; i++) {
 417                 voice = &sis->voices[i];
 418                 if (voice->flags & VOICE_IN_USE)
 419                         continue;
 420                 voice->flags |= VOICE_IN_USE;
 421                 goto found_one;
 422         }
 423         voice = NULL;
 424
 425 found_one:
 426         return voice;
 427 }
 428
 429 static struct voice *sis_alloc_playback_voice(struct sis7019 *sis)
 430 {
 431         struct voice *voice;
 432         unsigned long flags;
 433
 434         spin_lock_irqsave(&sis->voice_lock, flags);
 435         voice = __sis_alloc_playback_voice(sis);
 436         spin_unlock_irqrestore(&sis->voice_lock, flags);
 437
 438         return voice;
 439 }
 440
 441 static int sis_alloc_timing_voice(struct snd_pcm_substream *substream,
 442                                         struct snd_pcm_hw_params *hw_params)
 443 {
 444         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 445         struct snd_pcm_runtime *runtime = substream->runtime;
 446         struct voice *voice = runtime->private_data;
 447         unsigned int period_size, buffer_size;
 448         unsigned long flags;
 449         int needed;
 450
 451         /* If there are one or two periods per buffer, we don't need a
 452          * timing voice, as we can use the capture channel's interrupts
 453          * to clock out the periods.
 454          */
 455         period_size = params_period_size(hw_params);
 456         buffer_size = params_buffer_size(hw_params);
 457         needed = (period_size != buffer_size &&
 458                         period_size != (buffer_size / 2));
 459
 460         if (needed && !voice->timing) {
 461                 spin_lock_irqsave(&sis->voice_lock, flags);
 462                 voice->timing = __sis_alloc_playback_voice(sis);
 463                 if (voice->timing)
 464                         __sis_map_silence(sis);
 465                 spin_unlock_irqrestore(&sis->voice_lock, flags);
 466                 if (!voice->timing)
 467                         return -ENOMEM;
 468                 voice->timing->substream = substream;
 469         } else if (!needed && voice->timing) {
 470                 sis_free_voice(sis, voice);
 471                 voice->timing = NULL;
 472         }
 473
 474         return 0;
 475 }
 476
 477 static int sis_playback_open(struct snd_pcm_substream *substream)
 478 {
 479         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 480         struct snd_pcm_runtime *runtime = substream->runtime;
 481         struct voice *voice;
 482
 483         voice = sis_alloc_playback_voice(sis);
 484         if (!voice)
 485                 return -EAGAIN;
 486
 487         voice->substream = substream;
 488         runtime->private_data = voice;
 489         runtime->hw = sis_playback_hw_info;
 490         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 491                                                 9, 0xfff9);
 492         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 493                                                 9, 0xfff9);
 494         snd_pcm_set_sync(substream);
 495         return 0;
 496 }
 497
 498 static int sis_substream_close(struct snd_pcm_substream *substream)
 499 {
 500         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 501         struct snd_pcm_runtime *runtime = substream->runtime;
 502         struct voice *voice = runtime->private_data;
 503
 504         sis_free_voice(sis, voice);
 505         return 0;
 506 }
 507
 508 static int sis_playback_hw_params(struct snd_pcm_substream *substream,
 509                                         struct snd_pcm_hw_params *hw_params)
 510 {
 511         return snd_pcm_lib_malloc_pages(substream,
 512                                         params_buffer_bytes(hw_params));
 513 }
 514
 515 static int sis_hw_free(struct snd_pcm_substream *substream)
 516 {
 517         return snd_pcm_lib_free_pages(substream);
 518 }
 519
 520 static int sis_pcm_playback_prepare(struct snd_pcm_substream *substream)
 521 {
 522         struct snd_pcm_runtime *runtime = substream->runtime;
 523         struct voice *voice = runtime->private_data;
 524         void __iomem *ctrl_base = voice->ctrl_base;
 525         void __iomem *wave_base = voice->wave_base;
 526         u32 format, dma_addr, control, sso_eso, delta, reg;
 527         u16 leo;
 528
 529         /* We rely on the PCM core to ensure that the parameters for this
 530          * substream do not change on us while we're programming the HW.
 531          */
 532         format = 0;
 533         if (snd_pcm_format_width(runtime->format) == 8)
 534                 format |= SIS_PLAY_DMA_FORMAT_8BIT;
 535         if (!snd_pcm_format_signed(runtime->format))
 536                 format |= SIS_PLAY_DMA_FORMAT_UNSIGNED;
 537         if (runtime->channels == 1)
 538                 format |= SIS_PLAY_DMA_FORMAT_MONO;
 539
 540         /* The baseline setup is for a single period per buffer, and
 541          * we add bells and whistles as needed from there.
 542          */
 543         dma_addr = runtime->dma_addr;
 544         leo = runtime->buffer_size - 1;
 545         control = leo | SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_LEO;
 546         sso_eso = leo;
 547
 548         if (runtime->period_size == (runtime->buffer_size / 2)) {
 549                 control |= SIS_PLAY_DMA_INTR_AT_MLP;
 550         } else if (runtime->period_size != runtime->buffer_size) {
 551                 voice->flags |= VOICE_SSO_TIMING;
 552                 voice->sso = runtime->period_size - 1;
 553                 voice->period_size = runtime->period_size;
 554                 voice->buffer_size = runtime->buffer_size;
 555
 556                 control &= ~SIS_PLAY_DMA_INTR_AT_LEO;
 557                 control |= SIS_PLAY_DMA_INTR_AT_SSO;
 558                 sso_eso |= (runtime->period_size - 1) << 16;
 559         }
 560
 561         delta = sis_rate_to_delta(runtime->rate);
 562
 563         /* Ok, we're ready to go, set up the channel.
 564          */
 565         writel(format, ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 566         writel(dma_addr, ctrl_base + SIS_PLAY_DMA_BASE);
 567         writel(control, ctrl_base + SIS_PLAY_DMA_CONTROL);
 568         writel(sso_eso, ctrl_base + SIS_PLAY_DMA_SSO_ESO);
 569
 570         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 571                 writel(0, wave_base + reg);
 572
 573         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 574         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 575         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 576                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 577                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 578                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 579
 580         /* Force PCI writes to post. */
 581         readl(ctrl_base);
 582
 583         return 0;
 584 }
 585
 586 static int sis_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 587 {
 588         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 589         unsigned long io = sis->ioport;
 590         struct snd_pcm_substream *s;
 591         struct voice *voice;
 592         void *chip;
 593         int starting;
 594         u32 record = 0;
 595         u32 play[2] = { 0, 0 };
 596
 597         /* No locks needed, as the PCM core will hold the locks on the
 598          * substreams, and the HW will only start/stop the indicated voices
 599          * without changing the state of the others.
 600          */
 601         switch (cmd) {
 602         case SNDRV_PCM_TRIGGER_START:
 603         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 604         case SNDRV_PCM_TRIGGER_RESUME:
 605                 starting = 1;
 606                 break;
 607         case SNDRV_PCM_TRIGGER_STOP:
 608         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 609         case SNDRV_PCM_TRIGGER_SUSPEND:
 610                 starting = 0;
 611                 break;
 612         default:
 613                 return -EINVAL;
 614         }
 615
 616         snd_pcm_group_for_each_entry(s, substream) {
 617                 /* Make sure it is for us... */
 618                 chip = snd_pcm_substream_chip(s);
 619                 if (chip != sis)
 620                         continue;
 621
 622                 voice = s->runtime->private_data;
 623                 if (voice->flags & VOICE_CAPTURE) {
 624                         record |= 1 << voice->num;
 625                         voice = voice->timing;
 626                 }
 627
 628                 /* voice could be NULL if this a recording stream, and it
 629                  * doesn't have an external timing channel.
 630                  */
 631                 if (voice)
 632                         play[voice->num / 32] |= 1 << (voice->num & 0x1f);
 633
 634                 snd_pcm_trigger_done(s, substream);
 635         }
 636
 637         if (starting) {
 638                 if (record)
 639                         outl(record, io + SIS_RECORD_START_REG);
 640                 if (play[0])
 641                         outl(play[0], io + SIS_PLAY_START_A_REG);
 642                 if (play[1])
 643                         outl(play[1], io + SIS_PLAY_START_B_REG);
 644         } else {
 645                 if (record)
 646                         outl(record, io + SIS_RECORD_STOP_REG);
 647                 if (play[0])
 648                         outl(play[0], io + SIS_PLAY_STOP_A_REG);
 649                 if (play[1])
 650                         outl(play[1], io + SIS_PLAY_STOP_B_REG);
 651         }
 652         return 0;
 653 }
 654
 655 static snd_pcm_uframes_t sis_pcm_pointer(struct snd_pcm_substream *substream)
 656 {
 657         struct snd_pcm_runtime *runtime = substream->runtime;
 658         struct voice *voice = runtime->private_data;
 659         u32 cso;
 660
 661         cso = readl(voice->ctrl_base + SIS_PLAY_DMA_FORMAT_CSO);
 662         cso &= 0xffff;
 663         return cso;
 664 }
 665
 666 static int sis_capture_open(struct snd_pcm_substream *substream)
 667 {
 668         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 669         struct snd_pcm_runtime *runtime = substream->runtime;
 670         struct voice *voice = &sis->capture_voice;
 671         unsigned long flags;
 672
 673         /* FIXME: The driver only supports recording from one channel
 674          * at the moment, but it could support more.
 675          */
 676         spin_lock_irqsave(&sis->voice_lock, flags);
 677         if (voice->flags & VOICE_IN_USE)
 678                 voice = NULL;
 679         else
 680                 voice->flags |= VOICE_IN_USE;
 681         spin_unlock_irqrestore(&sis->voice_lock, flags);
 682
 683         if (!voice)
 684                 return -EAGAIN;
 685
 686         voice->substream = substream;
 687         runtime->private_data = voice;
 688         runtime->hw = sis_capture_hw_info;
 689         runtime->hw.rates = sis->ac97[0]->rates[AC97_RATES_ADC];
 690         snd_pcm_limit_hw_rates(runtime);
 691         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
 692                                                 9, 0xfff9);
 693         snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 694                                                 9, 0xfff9);
 695         snd_pcm_set_sync(substream);
 696         return 0;
 697 }
 698
 699 static int sis_capture_hw_params(struct snd_pcm_substream *substream,
 700                                         struct snd_pcm_hw_params *hw_params)
 701 {
 702         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 703         int rc;
 704
 705         rc = snd_ac97_set_rate(sis->ac97[0], AC97_PCM_LR_ADC_RATE,
 706                                                 params_rate(hw_params));
 707         if (rc)
 708                 goto out;
 709
 710         rc = snd_pcm_lib_malloc_pages(substream,
 711                                         params_buffer_bytes(hw_params));
 712         if (rc < 0)
 713                 goto out;
 714
 715         rc = sis_alloc_timing_voice(substream, hw_params);
 716
 717 out:
 718         return rc;
 719 }
 720
 721 static void sis_prepare_timing_voice(struct voice *voice,
 722                                         struct snd_pcm_substream *substream)
 723 {
 724         struct sis7019 *sis = snd_pcm_substream_chip(substream);
 725         struct snd_pcm_runtime *runtime = substream->runtime;
 726         struct voice *timing = voice->timing;
 727         void __iomem *play_base = timing->ctrl_base;
 728         void __iomem *wave_base = timing->wave_base;
 729         u16 buffer_size, period_size;
 730         u32 format, control, sso_eso, delta;
 731         u32 vperiod, sso, reg;
 732
 733         /* Set our initial buffer and period as large as we can given a
 734          * single page of silence.
 735          */
 736         buffer_size = 4096 / runtime->channels;
 737         buffer_size /= snd_pcm_format_size(runtime->format, 1);
 738         period_size = buffer_size;
 739
 740         /* Initially, we want to interrupt just a bit behind the end of
 741          * the period we're clocking out. 12 samples seems to give a good
 742          * delay.
 743          *
 744          * We want to spread our interrupts throughout the virtual period,
 745          * so that we don't end up with two interrupts back to back at the
 746          * end -- this helps minimize the effects of any jitter. Adjust our
 747          * clocking period size so that the last period is at least a fourth
 748          * of a full period.
 749          *
 750          * This is all moot if we don't need to use virtual periods.
 751          */
 752         vperiod = runtime->period_size + 12;
 753         if (vperiod > period_size) {
 754                 u16 tail = vperiod % period_size;
 755                 u16 quarter_period = period_size / 4;
 756
 757                 if (tail && tail < quarter_period) {
 758                         u16 loops = vperiod / period_size;
 759
 760                         tail = quarter_period - tail;
 761                         tail += loops - 1;
 762                         tail /= loops;
 763                         period_size -= tail;
 764                 }
 765
 766                 sso = period_size - 1;
 767         } else {
 768                 /* The initial period will fit inside the buffer, so we
 769                  * don't need to use virtual periods -- disable them.
 770                  */
 771                 period_size = runtime->period_size;
 772                 sso = vperiod - 1;
 773                 vperiod = 0;
 774         }
 775
 776         /* The interrupt handler implements the timing syncronization, so
 777          * setup its state.
 778          */
 779         timing->flags |= VOICE_SYNC_TIMING;
 780         timing->sync_base = voice->ctrl_base;
 781         timing->sync_cso = runtime->period_size;
 782         timing->sync_period_size = runtime->period_size;
 783         timing->sync_buffer_size = runtime->buffer_size;
 784         timing->period_size = period_size;
 785         timing->buffer_size = buffer_size;
 786         timing->sso = sso;
 787         timing->vperiod = vperiod;
 788
 789         /* Using unsigned samples with the all-zero silence buffer
 790          * forces the output to the lower rail, killing playback.
 791          * So ignore unsigned vs signed -- it doesn't change the timing.
 792          */
 793         format = 0;
 794         if (snd_pcm_format_width(runtime->format) == 8)
 795                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 796         if (runtime->channels == 1)
 797                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 798
 799         control = timing->buffer_size - 1;
 800         control |= SIS_PLAY_DMA_LOOP | SIS_PLAY_DMA_INTR_AT_SSO;
 801         sso_eso = timing->buffer_size - 1;
 802         sso_eso |= timing->sso << 16;
 803
 804         delta = sis_rate_to_delta(runtime->rate);
 805
 806         /* We've done the math, now configure the channel.
 807          */
 808         writel(format, play_base + SIS_PLAY_DMA_FORMAT_CSO);
 809         writel(sis->silence_dma_addr, play_base + SIS_PLAY_DMA_BASE);
 810         writel(control, play_base + SIS_PLAY_DMA_CONTROL);
 811         writel(sso_eso, play_base + SIS_PLAY_DMA_SSO_ESO);
 812
 813         for (reg = 0; reg < SIS_WAVE_SIZE; reg += 4)
 814                 writel(0, wave_base + reg);
 815
 816         writel(SIS_WAVE_GENERAL_WAVE_VOLUME, wave_base + SIS_WAVE_GENERAL);
 817         writel(delta << 16, wave_base + SIS_WAVE_GENERAL_ARTICULATION);
 818         writel(SIS_WAVE_CHANNEL_CONTROL_FIRST_SAMPLE |
 819                         SIS_WAVE_CHANNEL_CONTROL_AMP_ENABLE |
 820                         SIS_WAVE_CHANNEL_CONTROL_INTERPOLATE_ENABLE,
 821                         wave_base + SIS_WAVE_CHANNEL_CONTROL);
 822 }
 823
 824 static int sis_pcm_capture_prepare(struct snd_pcm_substream *substream)
 825 {
 826         struct snd_pcm_runtime *runtime = substream->runtime;
 827         struct voice *voice = runtime->private_data;
 828         void __iomem *rec_base = voice->ctrl_base;
 829         u32 format, dma_addr, control;
 830         u16 leo;
 831
 832         /* We rely on the PCM core to ensure that the parameters for this
 833          * substream do not change on us while we're programming the HW.
 834          */
 835         format = 0;
 836         if (snd_pcm_format_width(runtime->format) == 8)
 837                 format = SIS_CAPTURE_DMA_FORMAT_8BIT;
 838         if (!snd_pcm_format_signed(runtime->format))
 839                 format |= SIS_CAPTURE_DMA_FORMAT_UNSIGNED;
 840         if (runtime->channels == 1)
 841                 format |= SIS_CAPTURE_DMA_FORMAT_MONO;
 842
 843         dma_addr = runtime->dma_addr;
 844         leo = runtime->buffer_size - 1;
 845         control = leo | SIS_CAPTURE_DMA_LOOP;
 846
 847         /* If we've got more than two periods per buffer, then we have
 848          * use a timing voice to clock out the periods. Otherwise, we can
 849          * use the capture channel's interrupts.
 850          */
 851         if (voice->timing) {
 852                 sis_prepare_timing_voice(voice, substream);
 853         } else {
 854                 control |= SIS_CAPTURE_DMA_INTR_AT_LEO;
 855                 if (runtime->period_size != runtime->buffer_size)
 856                         control |= SIS_CAPTURE_DMA_INTR_AT_MLP;
 857         }
 858
 859         writel(format, rec_base + SIS_CAPTURE_DMA_FORMAT_CSO);
 860         writel(dma_addr, rec_base + SIS_CAPTURE_DMA_BASE);
 861         writel(control, rec_base + SIS_CAPTURE_DMA_CONTROL);
 862
 863         /* Force the writes to post. */
 864         readl(rec_base);
 865
 866         return 0;
 867 }
 868
 869 static struct snd_pcm_ops sis_playback_ops = {
 870         .open = sis_playback_open,
 871         .close = sis_substream_close,
 872         .ioctl = snd_pcm_lib_ioctl,
 873         .hw_params = sis_playback_hw_params,
 874         .hw_free = sis_hw_free,
 875         .prepare = sis_pcm_playback_prepare,
 876         .trigger = sis_pcm_trigger,
 877         .pointer = sis_pcm_pointer,
 878 };
 879
 880 static struct snd_pcm_ops sis_capture_ops = {
 881         .open = sis_capture_open,
 882         .close = sis_substream_close,
 883         .ioctl = snd_pcm_lib_ioctl,
 884         .hw_params = sis_capture_hw_params,
 885         .hw_free = sis_hw_free,
 886         .prepare = sis_pcm_capture_prepare,
 887         .trigger = sis_pcm_trigger,
 888         .pointer = sis_pcm_pointer,
 889 };
 890
 891 static int __devinit sis_pcm_create(struct sis7019 *sis)
 892 {
 893         struct snd_pcm *pcm;
 894         int rc;
 895
 896         /* We have 64 voices, and the driver currently records from
 897          * only one channel, though that could change in the future.
 898          */
 899         rc = snd_pcm_new(sis->card, "SiS7019", 0, 64, 1, &pcm);
 900         if (rc)
 901                 return rc;
 902
 903         pcm->private_data = sis;
 904         strcpy(pcm->name, "SiS7019");
 905         sis->pcm = pcm;
 906
 907         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &sis_playback_ops);
 908         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &sis_capture_ops);
 909
 910         /* Try to preallocate some memory, but it's not the end of the
 911          * world if this fails.
 912          */
 913         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 914                                 snd_dma_pci_data(sis->pci), 64*1024, 128*1024);
 915
 916         return 0;
 917 }
 918
 919 static unsigned short sis_ac97_rw(struct sis7019 *sis, int codec, u32 cmd)
 920 {
 921         unsigned long io = sis->ioport;
 922         unsigned short val = 0xffff;
 923         u16 status;
 924         u16 rdy;
 925         int count;
 926         static const u16 codec_ready[3] = {
 927                 SIS_AC97_STATUS_CODEC_READY,
 928                 SIS_AC97_STATUS_CODEC2_READY,
 929                 SIS_AC97_STATUS_CODEC3_READY,
 930         };
 931
 932         rdy = codec_ready[codec];
 933
 934
 935         /* Get the AC97 semaphore -- software first, so we don't spin
 936          * pounding out IO reads on the hardware semaphore...
 937          */
 938         mutex_lock(&sis->ac97_mutex);
 939
 940         count = 0xffff;
 941         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
 942                 udelay(1);
 943
 944         if (!count)
 945                 goto timeout;
 946
 947         /* ... and wait for any outstanding commands to complete ...
 948          */
 949         count = 0xffff;
 950         do {
 951                 status = inw(io + SIS_AC97_STATUS);
 952                 if ((status & rdy) && !(status & SIS_AC97_STATUS_BUSY))
 953                         break;
 954
 955                 udelay(1);
 956         } while (--count);
 957
 958         if (!count)
 959                 goto timeout_sema;
 960
 961         /* ... before sending our command and waiting for it to finish ...
 962          */
 963         outl(cmd, io + SIS_AC97_CMD);
 964         udelay(10);
 965
 966         count = 0xffff;
 967         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
 968                 udelay(1);
 969
 970         /* ... and reading the results (if any).
 971          */
 972         val = inl(io + SIS_AC97_CMD) >> 16;
 973
 974 timeout_sema:
 975         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
 976 timeout:
 977         mutex_unlock(&sis->ac97_mutex);
 978
 979         if (!count) {
 980                 printk(KERN_ERR "sis7019: ac97 codec %d timeout cmd 0x%08x\n",
 981                                         codec, cmd);
 982         }
 983
 984         return val;
 985 }
 986
 987 static void sis_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 988                                 unsigned short val)
 989 {
 990         static const u32 cmd[3] = {
 991                 SIS_AC97_CMD_CODEC_WRITE,
 992                 SIS_AC97_CMD_CODEC2_WRITE,
 993                 SIS_AC97_CMD_CODEC3_WRITE,
 994         };
 995         sis_ac97_rw(ac97->private_data, ac97->num,
 996                         (val << 16) | (reg << 8) | cmd[ac97->num]);
 997 }
 998
 999 static unsigned short sis_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
1000 {
1001         static const u32 cmd[3] = {
1002                 SIS_AC97_CMD_CODEC_READ,
1003                 SIS_AC97_CMD_CODEC2_READ,
1004                 SIS_AC97_CMD_CODEC3_READ,
1005         };
1006         return sis_ac97_rw(ac97->private_data, ac97->num,
1007                                         (reg << 8) | cmd[ac97->num]);
1008 }
1009
1010 static int __devinit sis_mixer_create(struct sis7019 *sis)
1011 {
1012         struct snd_ac97_bus *bus;
1013         struct snd_ac97_template ac97;
1014         static struct snd_ac97_bus_ops ops = {
1015                 .write = sis_ac97_write,
1016                 .read = sis_ac97_read,
1017         };
1018         int rc;
1019
1020         memset(&ac97, 0, sizeof(ac97));
1021         ac97.private_data = sis;
1022
1023         rc = snd_ac97_bus(sis->card, 0, &ops, NULL, &bus);
1024         if (!rc && sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1025                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[0]);
1026         ac97.num = 1;
1027         if (!rc && (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT))
1028                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[1]);
1029         ac97.num = 2;
1030         if (!rc && (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT))
1031                 rc = snd_ac97_mixer(bus, &ac97, &sis->ac97[2]);
1032
1033         /* If we return an error here, then snd_card_free() should
1034          * free up any ac97 codecs that got created, as well as the bus.
1035          */
1036         return rc;
1037 }
1038
1039 static void sis_free_suspend(struct sis7019 *sis)
1040 {
1041         int i;
1042
1043         for (i = 0; i < SIS_SUSPEND_PAGES; i++)
1044                 kfree(sis->suspend_state[i]);
1045 }
1046
1047 static int sis_chip_free(struct sis7019 *sis)
1048 {
1049         /* Reset the chip, and disable all interrputs.
1050          */
1051         outl(SIS_GCR_SOFTWARE_RESET, sis->ioport + SIS_GCR);
1052         udelay(25);
1053         outl(0, sis->ioport + SIS_GCR);
1054         outl(0, sis->ioport + SIS_GIER);
1055
1056         /* Now, free everything we allocated.
1057          */
1058         if (sis->irq >= 0)
1059                 free_irq(sis->irq, sis);
1060
1061         if (sis->ioaddr)
1062                 iounmap(sis->ioaddr);
1063
1064         pci_release_regions(sis->pci);
1065         pci_disable_device(sis->pci);
1066
1067         sis_free_suspend(sis);
1068         return 0;
1069 }
1070
1071 static int sis_dev_free(struct snd_device *dev)
1072 {
1073         struct sis7019 *sis = dev->device_data;
1074         return sis_chip_free(sis);
1075 }
1076
1077 static int sis_chip_init(struct sis7019 *sis)
1078 {
1079         unsigned long io = sis->ioport;
1080         void __iomem *ioaddr = sis->ioaddr;
1081         u16 status;
1082         int count;
1083         int i;
1084
1085         /* Reset the audio controller
1086          */
1087         outl(SIS_GCR_SOFTWARE_RESET, io + SIS_GCR);
1088         udelay(25);
1089         outl(0, io + SIS_GCR);
1090
1091         /* Get the AC-link semaphore, and reset the codecs
1092          */
1093         count = 0xffff;
1094         while ((inw(io + SIS_AC97_SEMA) & SIS_AC97_SEMA_BUSY) && --count)
1095                 udelay(1);
1096
1097         if (!count)
1098                 return -EIO;
1099
1100         outl(SIS_AC97_CMD_CODEC_COLD_RESET, io + SIS_AC97_CMD);
1101         udelay(250);
1102
1103         count = 0xffff;
1104         while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
1105                 udelay(1);
1106
1107         /* Now that we've finished the reset, find out what's attached.
1108          */
1109         status = inl(io + SIS_AC97_STATUS);
1110         if (status & SIS_AC97_STATUS_CODEC_READY)
1111                 sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
1112         if (status & SIS_AC97_STATUS_CODEC2_READY)
1113                 sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
1114         if (status & SIS_AC97_STATUS_CODEC3_READY)
1115                 sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
1116
1117         /* All done, let go of the semaphore, and check for errors
1118          */
1119         outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
1120         if (!sis->codecs_present || !count)
1121                 return -EIO;
1122
1123         /* Let the hardware know that the audio driver is alive,
1124          * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
1125          * record channels. We're going to want to use Variable Rate Audio
1126          * for recording, to avoid needlessly resampling from 48kHZ.
1127          */
1128         outl(SIS_AC97_CONF_AUDIO_ALIVE, io + SIS_AC97_CONF);
1129         outl(SIS_AC97_CONF_AUDIO_ALIVE | SIS_AC97_CONF_PCM_LR_ENABLE |
1130                 SIS_AC97_CONF_PCM_CAP_MIC_ENABLE |
1131                 SIS_AC97_CONF_PCM_CAP_LR_ENABLE |
1132                 SIS_AC97_CONF_CODEC_VRA_ENABLE, io + SIS_AC97_CONF);
1133
1134         /* All AC97 PCM slots should be sourced from sub-mixer 0.
1135          */
1136         outl(0, io + SIS_AC97_PSR);
1137
1138         /* There is only one valid DMA setup for a PCI environment.
1139          */
1140         outl(SIS_DMA_CSR_PCI_SETTINGS, io + SIS_DMA_CSR);
1141
1142         /* Reset the syncronization groups for all of the channels
1143          * to be asyncronous. If we start doing SPDIF or 5.1 sound, etc.
1144          * we'll need to change how we handle these. Until then, we just
1145          * assign sub-mixer 0 to all playback channels, and avoid any
1146          * attenuation on the audio.
1147          */
1148         outl(0, io + SIS_PLAY_SYNC_GROUP_A);
1149         outl(0, io + SIS_PLAY_SYNC_GROUP_B);
1150         outl(0, io + SIS_PLAY_SYNC_GROUP_C);
1151         outl(0, io + SIS_PLAY_SYNC_GROUP_D);
1152         outl(0, io + SIS_MIXER_SYNC_GROUP);
1153
1154         for (i = 0; i < 64; i++) {
1155                 writel(i, SIS_MIXER_START_ADDR(ioaddr, i));
1156                 writel(SIS_MIXER_RIGHT_NO_ATTEN | SIS_MIXER_LEFT_NO_ATTEN |
1157                                 SIS_MIXER_DEST_0, SIS_MIXER_ADDR(ioaddr, i));
1158         }
1159
1160         /* Don't attenuate any audio set for the wave amplifier.
1161          *
1162          * FIXME: Maximum attenuation is set for the music amp, which will
1163          * need to change if we start using the synth engine.
1164          */
1165         outl(0xffff0000, io + SIS_WEVCR);
1166
1167         /* Ensure that the wave engine is in normal operating mode.
1168          */
1169         outl(0, io + SIS_WECCR);
1170
1171         /* Go ahead and enable the DMA interrupts. They won't go live
1172          * until we start a channel.
1173          */
1174         outl(SIS_GIER_AUDIO_PLAY_DMA_IRQ_ENABLE |
1175                 SIS_GIER_AUDIO_RECORD_DMA_IRQ_ENABLE, io + SIS_GIER);
1176
1177         return 0;
1178 }
1179
1180 #ifdef CONFIG_PM
1181 static int sis_suspend(struct pci_dev *pci, pm_message_t state)
1182 {
1183         struct snd_card *card = pci_get_drvdata(pci);
1184         struct sis7019 *sis = card->private_data;
1185         void __iomem *ioaddr = sis->ioaddr;
1186         int i;
1187
1188         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1189         snd_pcm_suspend_all(sis->pcm);
1190         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1191                 snd_ac97_suspend(sis->ac97[0]);
1192         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1193                 snd_ac97_suspend(sis->ac97[1]);
1194         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1195                 snd_ac97_suspend(sis->ac97[2]);
1196
1197         /* snd_pcm_suspend_all() stopped all channels, so we're quiescent.
1198          */
1199         if (sis->irq >= 0) {
1200                 free_irq(sis->irq, sis);
1201                 sis->irq = -1;
1202         }
1203
1204         /* Save the internal state away
1205          */
1206         for (i = 0; i < 4; i++) {
1207                 memcpy_fromio(sis->suspend_state[i], ioaddr, 4096);
1208                 ioaddr += 4096;
1209         }
1210
1211         pci_disable_device(pci);
1212         pci_save_state(pci);
1213         pci_set_power_state(pci, pci_choose_state(pci, state));
1214         return 0;
1215 }
1216
1217 static int sis_resume(struct pci_dev *pci)
1218 {
1219         struct snd_card *card = pci_get_drvdata(pci);
1220         struct sis7019 *sis = card->private_data;
1221         void __iomem *ioaddr = sis->ioaddr;
1222         int i;
1223
1224         pci_set_power_state(pci, PCI_D0);
1225         pci_restore_state(pci);
1226
1227         if (pci_enable_device(pci) < 0) {
1228                 printk(KERN_ERR "sis7019: unable to re-enable device\n");
1229                 goto error;
1230         }
1231
1232         if (sis_chip_init(sis)) {
1233                 printk(KERN_ERR "sis7019: unable to re-init controller\n");
1234                 goto error;
1235         }
1236
1237         if (request_irq(pci->irq, sis_interrupt, IRQF_DISABLED|IRQF_SHARED,
1238                                 card->shortname, sis)) {
1239                 printk(KERN_ERR "sis7019: unable to regain IRQ %d\n", pci->irq);
1240                 goto error;
1241         }
1242
1243         /* Restore saved state, then clear out the page we use for the
1244          * silence buffer.
1245          */
1246         for (i = 0; i < 4; i++) {
1247                 memcpy_toio(ioaddr, sis->suspend_state[i], 4096);
1248                 ioaddr += 4096;
1249         }
1250
1251         memset(sis->suspend_state[0], 0, 4096);
1252
1253         sis->irq = pci->irq;
1254         pci_set_master(pci);
1255
1256         if (sis->codecs_present & SIS_PRIMARY_CODEC_PRESENT)
1257                 snd_ac97_resume(sis->ac97[0]);
1258         if (sis->codecs_present & SIS_SECONDARY_CODEC_PRESENT)
1259                 snd_ac97_resume(sis->ac97[1]);
1260         if (sis->codecs_present & SIS_TERTIARY_CODEC_PRESENT)
1261                 snd_ac97_resume(sis->ac97[2]);
1262
1263         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1264         return 0;
1265
1266 error:
1267         snd_card_disconnect(card);
1268         return -EIO;
1269 }
1270 #endif /* CONFIG_PM */
1271
1272 static int sis_alloc_suspend(struct sis7019 *sis)
1273 {
1274         int i;
1275
1276         /* We need 16K to store the internal wave engine state during a
1277          * suspend, but we don't need it to be contiguous, so play nice
1278          * with the memory system. We'll also use this area for a silence
1279          * buffer.
1280          */
1281         for (i = 0; i < SIS_SUSPEND_PAGES; i++) {
1282                 sis->suspend_state[i] = kmalloc(4096, GFP_KERNEL);
1283                 if (!sis->suspend_state[i])
1284                         return -ENOMEM;
1285         }
1286         memset(sis->suspend_state[0], 0, 4096);
1287
1288         return 0;
1289 }
1290
1291 static int __devinit sis_chip_create(struct snd_card *card,
1292                                         struct pci_dev *pci)
1293 {
1294         struct sis7019 *sis = card->private_data;
1295         struct voice *voice;
1296         static struct snd_device_ops ops = {
1297                 .dev_free = sis_dev_free,
1298         };
1299         int rc;
1300         int i;
1301
1302         rc = pci_enable_device(pci);
1303         if (rc)
1304                 goto error_out;
1305
1306         if (pci_set_dma_mask(pci, DMA_BIT_MASK(30)) < 0) {
1307                 printk(KERN_ERR "sis7019: architecture does not support "
1308                                         "30-bit PCI busmaster DMA");
1309                 goto error_out_enabled;
1310         }
1311
1312         memset(sis, 0, sizeof(*sis));
1313         mutex_init(&sis->ac97_mutex);
1314         spin_lock_init(&sis->voice_lock);
1315         sis->card = card;
1316         sis->pci = pci;
1317         sis->irq = -1;
1318         sis->ioport = pci_resource_start(pci, 0);
1319
1320         rc = pci_request_regions(pci, "SiS7019");
1321         if (rc) {
1322                 printk(KERN_ERR "sis7019: unable request regions\n");
1323                 goto error_out_enabled;
1324         }
1325
1326         rc = -EIO;
1327         sis->ioaddr = ioremap_nocache(pci_resource_start(pci, 1), 0x4000);
1328         if (!sis->ioaddr) {
1329                 printk(KERN_ERR "sis7019: unable to remap MMIO, aborting\n");
1330                 goto error_out_cleanup;
1331         }
1332
1333         rc = sis_alloc_suspend(sis);
1334         if (rc < 0) {
1335                 printk(KERN_ERR "sis7019: unable to allocate state storage\n");
1336                 goto error_out_cleanup;
1337         }
1338
1339         rc = sis_chip_init(sis);
1340         if (rc)
1341                 goto error_out_cleanup;
1342
1343         if (request_irq(pci->irq, sis_interrupt, IRQF_DISABLED|IRQF_SHARED,
1344                                 card->shortname, sis)) {
1345                 printk(KERN_ERR "unable to allocate irq %d\n", sis->irq);
1346                 goto error_out_cleanup;
1347         }
1348
1349         sis->irq = pci->irq;
1350         pci_set_master(pci);
1351
1352         for (i = 0; i < 64; i++) {
1353                 voice = &sis->voices[i];
1354                 voice->num = i;
1355                 voice->ctrl_base = SIS_PLAY_DMA_ADDR(sis->ioaddr, i);
1356                 voice->wave_base = SIS_WAVE_ADDR(sis->ioaddr, i);
1357         }
1358
1359         voice = &sis->capture_voice;
1360         voice->flags = VOICE_CAPTURE;
1361         voice->num = SIS_CAPTURE_CHAN_AC97_PCM_IN;
1362         voice->ctrl_base = SIS_CAPTURE_DMA_ADDR(sis->ioaddr, voice->num);
1363
1364         rc = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sis, &ops);
1365         if (rc)
1366                 goto error_out_cleanup;
1367
1368         snd_card_set_dev(card, &pci->dev);
1369
1370         return 0;
1371
1372 error_out_cleanup:
1373         sis_chip_free(sis);
1374
1375 error_out_enabled:
1376         pci_disable_device(pci);
1377
1378 error_out:
1379         return rc;
1380 }
1381
1382 static int __devinit snd_sis7019_probe(struct pci_dev *pci,
1383                                         const struct pci_device_id *pci_id)
1384 {
1385         struct snd_card *card;
1386         struct sis7019 *sis;
1387         int rc;
1388
1389         rc = -ENOENT;
1390         if (!enable)
1391                 goto error_out;
1392
1393         rc = snd_card_create(index, id, THIS_MODULE, sizeof(*sis), &card);
1394         if (rc < 0)
1395                 goto error_out;
1396
1397         strcpy(card->driver, "SiS7019");
1398         strcpy(card->shortname, "SiS7019");
1399         rc = sis_chip_create(card, pci);
1400         if (rc)
1401                 goto card_error_out;
1402
1403         sis = card->private_data;
1404
1405         rc = sis_mixer_create(sis);
1406         if (rc)
1407                 goto card_error_out;
1408
1409         rc = sis_pcm_create(sis);
1410         if (rc)
1411                 goto card_error_out;
1412
1413         snprintf(card->longname, sizeof(card->longname),
1414                         "%s Audio Accelerator with %s at 0x%lx, irq %d",
1415                         card->shortname, snd_ac97_get_short_name(sis->ac97[0]),
1416                         sis->ioport, sis->irq);
1417
1418         rc = snd_card_register(card);
1419         if (rc)
1420                 goto card_error_out;
1421
1422         pci_set_drvdata(pci, card);
1423         return 0;
1424
1425 card_error_out:
1426         snd_card_free(card);
1427
1428 error_out:
1429         return rc;
1430 }
1431
1432 static void __devexit snd_sis7019_remove(struct pci_dev *pci)
1433 {
1434         snd_card_free(pci_get_drvdata(pci));
1435         pci_set_drvdata(pci, NULL);
1436 }
1437
1438 static struct pci_driver sis7019_driver = {
1439         .name = "SiS7019",
1440         .id_table = snd_sis7019_ids,
1441         .probe = snd_sis7019_probe,
1442         .remove = __devexit_p(snd_sis7019_remove),
1443
1444 #ifdef CONFIG_PM
1445         .suspend = sis_suspend,
1446         .resume = sis_resume,
1447 #endif
1448 };
1449
1450 static int __init sis7019_init(void)
1451 {
1452         return pci_register_driver(&sis7019_driver);
1453 }
1454
1455 static void __exit sis7019_exit(void)
1456 {
1457         pci_unregister_driver(&sis7019_driver);
1458 }
1459
1460 module_init(sis7019_init);
1461 module_exit(sis7019_exit);