sound/ppc/pmac.c

   1 /*
   2  * PMac DBDMA lowlevel functions
   3  *
   4  * Copyright (c) by Takashi Iwai <tiwai@suse.de>
   5  * code based on dmasound.c.
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22
  23 #include <sound/driver.h>
  24 #include <asm/io.h>
  25 #include <asm/irq.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/slab.h>
  29 #include <linux/interrupt.h>
  30 #include <sound/core.h>
  31 #include "pmac.h"
  32 #include <sound/pcm_params.h>
  33 #ifdef CONFIG_PPC_HAS_FEATURE_CALLS
  34 #include <asm/pmac_feature.h>
  35 #else
  36 #include <asm/feature.h>
  37 #endif
  38
  39 #define chip_t pmac_t
  40
  41
  42 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
  43 static int snd_pmac_register_sleep_notifier(pmac_t *chip);
  44 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip);
  45 static int snd_pmac_suspend(snd_card_t *card, unsigned int state);
  46 static int snd_pmac_resume(snd_card_t *card, unsigned int state);
  47 #endif
  48
  49
  50 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  51 static int awacs_freqs[8] = {
  52         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  53 };
  54 /* fixed frequency table for tumbler */
  55 static int tumbler_freqs[2] = {
  56         48000, 44100
  57 };
  58
  59 /*
  60  * allocate DBDMA command arrays
  61  */
  62 static int snd_pmac_dbdma_alloc(pmac_dbdma_t *rec, int size)
  63 {
  64         rec->space = kmalloc(sizeof(struct dbdma_cmd) * (size + 1), GFP_KERNEL);
  65         if (rec->space == NULL)
  66                 return -ENOMEM;
  67         rec->size = size;
  68         memset(rec->space, 0, sizeof(struct dbdma_cmd) * (size + 1));
  69         rec->cmds = (void*)DBDMA_ALIGN(rec->space);
  70         rec->addr = virt_to_bus(rec->cmds);
  71         return 0;
  72 }
  73
  74 static void snd_pmac_dbdma_free(pmac_dbdma_t *rec)
  75 {
  76         if (rec && rec->space)
  77                 kfree(rec->space);
  78 }
  79
  80
  81 /*
  82  * pcm stuff
  83  */
  84
  85 /*
  86  * look up frequency table
  87  */
  88
  89 static unsigned int snd_pmac_rate_index(pmac_t *chip, pmac_stream_t *rec, unsigned int rate)
  90 {
  91         int i, ok, found;
  92
  93         ok = rec->cur_freqs;
  94         if (rate > chip->freq_table[0])
  95                 return 0;
  96         found = 0;
  97         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
  98                 if (! (ok & 1)) continue;
  99                 found = i;
 100                 if (rate >= chip->freq_table[i])
 101                         break;
 102         }
 103         return found;
 104 }
 105
 106 /*
 107  * check whether another stream is active
 108  */
 109 static inline int another_stream(int stream)
 110 {
 111         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 112                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 113 }
 114
 115 /*
 116  * allocate buffers
 117  */
 118 static int snd_pmac_pcm_hw_params(snd_pcm_substream_t *subs,
 119                                   snd_pcm_hw_params_t *hw_params)
 120 {
 121         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 122 }
 123
 124 /*
 125  * release buffers
 126  */
 127 static int snd_pmac_pcm_hw_free(snd_pcm_substream_t *subs)
 128 {
 129         snd_pcm_lib_free_pages(subs);
 130         return 0;
 131 }
 132
 133 /*
 134  * get a stream of the opposite direction
 135  */
 136 static pmac_stream_t *snd_pmac_get_stream(pmac_t *chip, int stream)
 137 {
 138         switch (stream) {
 139         case SNDRV_PCM_STREAM_PLAYBACK:
 140                 return &chip->playback;
 141         case SNDRV_PCM_STREAM_CAPTURE:
 142                 return &chip->capture;
 143         default:
 144                 snd_BUG();
 145                 return NULL;
 146         }
 147 }
 148
 149 /*
 150  * wait while run status is on
 151  */
 152 inline static void
 153 snd_pmac_wait_ack(pmac_stream_t *rec)
 154 {
 155         int timeout = 50000;
 156         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 157                 udelay(1);
 158 }
 159
 160 /*
 161  * set the format and rate to the chip.
 162  * call the lowlevel function if defined (e.g. for AWACS).
 163  */
 164 static void snd_pmac_pcm_set_format(pmac_t *chip)
 165 {
 166         /* set up frequency and format */
 167         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 168         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 169         if (chip->set_format)
 170                 chip->set_format(chip);
 171 }
 172
 173 /*
 174  * stop the DMA transfer
 175  */
 176 inline static void snd_pmac_dma_stop(pmac_stream_t *rec)
 177 {
 178         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 179         snd_pmac_wait_ack(rec);
 180 }
 181
 182 /*
 183  * set the command pointer address
 184  */
 185 inline static void snd_pmac_dma_set_command(pmac_stream_t *rec, pmac_dbdma_t *cmd)
 186 {
 187         out_le32(&rec->dma->cmdptr, cmd->addr);
 188 }
 189
 190 /*
 191  * start the DMA
 192  */
 193 inline static void snd_pmac_dma_run(pmac_stream_t *rec, int status)
 194 {
 195         out_le32(&rec->dma->control, status | (status << 16));
 196 }
 197
 198
 199 /*
 200  * prepare playback/capture stream
 201  */
 202 static int snd_pmac_pcm_prepare(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 203 {
 204         int i;
 205         volatile struct dbdma_cmd *cp;
 206         unsigned long flags;
 207         snd_pcm_runtime_t *runtime = subs->runtime;
 208         int rate_index;
 209         long offset;
 210         pmac_stream_t *astr;
 211
 212         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 213         rec->period_size = snd_pcm_lib_period_bytes(subs);
 214         rec->nperiods = rec->dma_size / rec->period_size;
 215         rec->cur_period = 0;
 216         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 217
 218         /* set up constraints */
 219         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 220         snd_runtime_check(astr, return -EINVAL);
 221         astr->cur_freqs = 1 << rate_index;
 222         astr->cur_formats = 1 << runtime->format;
 223         chip->rate_index = rate_index;
 224         chip->format = runtime->format;
 225
 226         /* We really want to execute a DMA stop command, after the AWACS
 227          * is initialized.
 228          * For reasons I don't understand, it stops the hissing noise
 229          * common to many PowerBook G3 systems (like mine :-).
 230          */
 231         spin_lock_irqsave(&chip->reg_lock, flags);
 232         snd_pmac_dma_stop(rec);
 233         if (rec->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 234                 st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 235                 snd_pmac_dma_set_command(rec, &chip->extra_dma);
 236                 snd_pmac_dma_run(rec, RUN);
 237         }
 238         /* continuous DMA memory type doesn't provide the physical address,
 239          * so we need to resolve the address here...
 240          */
 241         offset = virt_to_bus(runtime->dma_area);
 242         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 243                 st_le32(&cp->phy_addr, offset);
 244                 st_le16(&cp->req_count, rec->period_size);
 245                 /*st_le16(&cp->res_count, 0);*/
 246                 st_le16(&cp->xfer_status, 0);
 247                 offset += rec->period_size;
 248         }
 249         /* make loop */
 250         st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
 251         st_le32(&cp->cmd_dep, rec->cmd.addr);
 252
 253         snd_pmac_dma_stop(rec);
 254         snd_pmac_dma_set_command(rec, &rec->cmd);
 255         spin_unlock_irqrestore(&chip->reg_lock, flags);
 256
 257         return 0;
 258 }
 259
 260
 261 /*
 262  * PCM trigger/stop
 263  */
 264 static int snd_pmac_pcm_trigger(pmac_t *chip, pmac_stream_t *rec,
 265                                 snd_pcm_substream_t *subs, int cmd)
 266 {
 267         unsigned long flags;
 268         volatile struct dbdma_cmd *cp;
 269         int i, command;
 270
 271         switch (cmd) {
 272         case SNDRV_PCM_TRIGGER_START:
 273         case SNDRV_PCM_TRIGGER_RESUME:
 274                 if (rec->running)
 275                         return -EBUSY;
 276                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 277                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 278                 spin_lock_irqsave(&chip->reg_lock, flags);
 279                 snd_pmac_beep_stop(chip);
 280                 snd_pmac_pcm_set_format(chip);
 281                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 282                         out_le16(&cp->command, command);
 283                 snd_pmac_dma_set_command(rec, &rec->cmd);
 284                 (void)in_le32(&rec->dma->status);
 285                 snd_pmac_dma_run(rec, RUN|WAKE);
 286                 rec->running = 1;
 287                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 288                 break;
 289
 290         case SNDRV_PCM_TRIGGER_STOP:
 291         case SNDRV_PCM_TRIGGER_SUSPEND:
 292                 spin_lock_irqsave(&chip->reg_lock, flags);
 293                 rec->running = 0;
 294                 /*printk("stopped!!\n");*/
 295                 snd_pmac_dma_stop(rec);
 296                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 297                         out_le16(&cp->command, DBDMA_STOP);
 298                 spin_unlock_irqrestore(&chip->reg_lock, flags);
 299                 break;
 300
 301         default:
 302                 return -EINVAL;
 303         }
 304
 305         return 0;
 306 }
 307
 308 /*
 309  * return the current pointer
 310  */
 311 inline
 312 static snd_pcm_uframes_t snd_pmac_pcm_pointer(pmac_t *chip, pmac_stream_t *rec,
 313                                               snd_pcm_substream_t *subs)
 314 {
 315         int count = 0;
 316
 317 #if 1 /* hmm.. how can we get the current dma pointer?? */
 318         int stat;
 319         volatile struct dbdma_cmd *cp = &rec->cmd.cmds[rec->cur_period];
 320         stat = ld_le16(&cp->xfer_status);
 321         if (stat & (ACTIVE|DEAD)) {
 322                 count = in_le16(&cp->res_count);
 323                 count = rec->period_size - count;
 324         }
 325 #endif
 326         count += rec->cur_period * rec->period_size;
 327         /*printk("pointer=%d\n", count);*/
 328         return bytes_to_frames(subs->runtime, count);
 329 }
 330
 331 /*
 332  * playback
 333  */
 334
 335 static int snd_pmac_playback_prepare(snd_pcm_substream_t *subs)
 336 {
 337         pmac_t *chip = snd_pcm_substream_chip(subs);
 338         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
 339 }
 340
 341 static int snd_pmac_playback_trigger(snd_pcm_substream_t *subs,
 342                                      int cmd)
 343 {
 344         pmac_t *chip = snd_pcm_substream_chip(subs);
 345         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
 346 }
 347
 348 static snd_pcm_uframes_t snd_pmac_playback_pointer(snd_pcm_substream_t *subs)
 349 {
 350         pmac_t *chip = snd_pcm_substream_chip(subs);
 351         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
 352 }
 353
 354
 355 /*
 356  * capture
 357  */
 358
 359 static int snd_pmac_capture_prepare(snd_pcm_substream_t *subs)
 360 {
 361         pmac_t *chip = snd_pcm_substream_chip(subs);
 362         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
 363 }
 364
 365 static int snd_pmac_capture_trigger(snd_pcm_substream_t *subs,
 366                                     int cmd)
 367 {
 368         pmac_t *chip = snd_pcm_substream_chip(subs);
 369         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
 370 }
 371
 372 static snd_pcm_uframes_t snd_pmac_capture_pointer(snd_pcm_substream_t *subs)
 373 {
 374         pmac_t *chip = snd_pcm_substream_chip(subs);
 375         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
 376 }
 377
 378
 379 /*
 380  * update playback/capture pointer from interrupts
 381  */
 382 static void snd_pmac_pcm_update(pmac_t *chip, pmac_stream_t *rec)
 383 {
 384         volatile struct dbdma_cmd *cp;
 385         int c;
 386         int stat;
 387
 388         spin_lock(&chip->reg_lock);
 389         if (rec->running) {
 390                 cp = &rec->cmd.cmds[rec->cur_period];
 391                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
 392                         stat = ld_le16(&cp->xfer_status);
 393                         if (! (stat & ACTIVE))
 394                                 break;
 395                         /*printk("update frag %d\n", rec->cur_period);*/
 396                         st_le16(&cp->xfer_status, 0);
 397                         st_le16(&cp->req_count, rec->period_size);
 398                         /*st_le16(&cp->res_count, 0);*/
 399                         rec->cur_period++;
 400                         if (rec->cur_period >= rec->nperiods) {
 401                                 rec->cur_period = 0;
 402                                 cp = rec->cmd.cmds;
 403                         } else
 404                                 cp++;
 405                         spin_unlock(&chip->reg_lock);
 406                         snd_pcm_period_elapsed(rec->substream);
 407                         spin_lock(&chip->reg_lock);
 408                 }
 409         }
 410         spin_unlock(&chip->reg_lock);
 411 }
 412
 413
 414 /*
 415  * hw info
 416  */
 417
 418 static snd_pcm_hardware_t snd_pmac_playback =
 419 {
 420         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 421                                  SNDRV_PCM_INFO_MMAP |
 422                                  SNDRV_PCM_INFO_MMAP_VALID |
 423                                  SNDRV_PCM_INFO_RESUME),
 424         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 425         .rates =                SNDRV_PCM_RATE_8000_44100,
 426         .rate_min =             7350,
 427         .rate_max =             44100,
 428         .channels_min =         2,
 429         .channels_max =         2,
 430         .buffer_bytes_max =     32768,
 431         .period_bytes_min =     256,
 432         .period_bytes_max =     16384,
 433         .periods_min =          1,
 434         .periods_max =          PMAC_MAX_FRAGS,
 435 };
 436
 437 static snd_pcm_hardware_t snd_pmac_capture =
 438 {
 439         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 440                                  SNDRV_PCM_INFO_MMAP |
 441                                  SNDRV_PCM_INFO_MMAP_VALID |
 442                                  SNDRV_PCM_INFO_RESUME),
 443         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 444         .rates =                SNDRV_PCM_RATE_8000_44100,
 445         .rate_min =             7350,
 446         .rate_max =             44100,
 447         .channels_min =         2,
 448         .channels_max =         2,
 449         .buffer_bytes_max =     32768,
 450         .period_bytes_min =     256,
 451         .period_bytes_max =     16384,
 452         .periods_min =          1,
 453         .periods_max =          PMAC_MAX_FRAGS,
 454 };
 455
 456
 457 #if 0 // NYI
 458 static int snd_pmac_hw_rule_rate(snd_pcm_hw_params_t *params,
 459                                  snd_pcm_hw_rule_t *rule)
 460 {
 461         pmac_t *chip = rule->private;
 462         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 463         int i, freq_table[8], num_freqs;
 464
 465         snd_runtime_check(rec, return -EINVAL);
 466         num_freqs = 0;
 467         for (i = chip->num_freqs - 1; i >= 0; i--) {
 468                 if (rec->cur_freqs & (1 << i))
 469                         freq_table[num_freqs++] = chip->freq_table[i];
 470         }
 471
 472         return snd_interval_list(hw_param_interval(params, rule->var),
 473                                  num_freqs, freq_table, 0);
 474 }
 475
 476 static int snd_pmac_hw_rule_format(snd_pcm_hw_params_t *params,
 477                                    snd_pcm_hw_rule_t *rule)
 478 {
 479         pmac_t *chip = rule->private;
 480         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 481
 482         snd_runtime_check(rec, return -EINVAL);
 483         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 484                                    rec->cur_formats);
 485 }
 486 #endif // NYI
 487
 488 static int snd_pmac_pcm_open(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 489 {
 490         snd_pcm_runtime_t *runtime = subs->runtime;
 491         int i, j, fflags;
 492         static int typical_freqs[] = {
 493                 48000,
 494                 44100,
 495                 22050,
 496                 11025,
 497                 0,
 498         };
 499         static int typical_freq_flags[] = {
 500                 SNDRV_PCM_RATE_48000,
 501                 SNDRV_PCM_RATE_44100,
 502                 SNDRV_PCM_RATE_22050,
 503                 SNDRV_PCM_RATE_11025,
 504                 0,
 505         };
 506
 507         /* look up frequency table and fill bit mask */
 508         runtime->hw.rates = 0;
 509         fflags = chip->freqs_ok;
 510         for (i = 0; typical_freqs[i]; i++) {
 511                 for (j = 0; j < chip->num_freqs; j++) {
 512                         if ((chip->freqs_ok & (1 << j)) &&
 513                             chip->freq_table[j] == typical_freqs[i]) {
 514                                 runtime->hw.rates |= typical_freq_flags[i];
 515                                 fflags &= ~(1 << j);
 516                                 break;
 517                         }
 518                 }
 519         }
 520         if (fflags) /* rest */
 521                 runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
 522
 523         /* check for minimum and maximum rates */
 524         for (i = 0; i < chip->num_freqs; i++) {
 525                 if (chip->freqs_ok & (1 << i)) {
 526                         runtime->hw.rate_max = chip->freq_table[i];
 527                         break;
 528                 }
 529         }
 530         for (i = chip->num_freqs - 1; i >= 0; i--) {
 531                 if (chip->freqs_ok & (1 << i)) {
 532                         runtime->hw.rate_min = chip->freq_table[i];
 533                         break;
 534                 }
 535         }
 536         runtime->hw.formats = chip->formats_ok;
 537         if (chip->can_capture) {
 538                 if (! chip->can_duplex)
 539                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 540                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 541         }
 542         runtime->private_data = rec;
 543         rec->substream = subs;
 544
 545 #if 0 /* FIXME: still under development.. */
 546         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 547                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 548         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 549                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
 550 #endif
 551
 552         runtime->hw.periods_max = rec->cmd.size - 1;
 553
 554         if (chip->can_duplex)
 555                 snd_pcm_set_sync(subs);
 556
 557         return 0;
 558 }
 559
 560 static int snd_pmac_pcm_close(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 561 {
 562         pmac_stream_t *astr;
 563
 564         snd_pmac_dma_stop(rec);
 565
 566         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 567         snd_runtime_check(astr, return -EINVAL);
 568
 569         /* reset constraints */
 570         astr->cur_freqs = chip->freqs_ok;
 571         astr->cur_formats = chip->formats_ok;
 572
 573         return 0;
 574 }
 575
 576 static int snd_pmac_playback_open(snd_pcm_substream_t *subs)
 577 {
 578         pmac_t *chip = snd_pcm_substream_chip(subs);
 579
 580         subs->runtime->hw = snd_pmac_playback;
 581         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 582 }
 583
 584 static int snd_pmac_capture_open(snd_pcm_substream_t *subs)
 585 {
 586         pmac_t *chip = snd_pcm_substream_chip(subs);
 587
 588         subs->runtime->hw = snd_pmac_capture;
 589         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 590 }
 591
 592 static int snd_pmac_playback_close(snd_pcm_substream_t *subs)
 593 {
 594         pmac_t *chip = snd_pcm_substream_chip(subs);
 595
 596         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 597 }
 598
 599 static int snd_pmac_capture_close(snd_pcm_substream_t *subs)
 600 {
 601         pmac_t *chip = snd_pcm_substream_chip(subs);
 602
 603         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 604 }
 605
 606 /*
 607  */
 608
 609 static snd_pcm_ops_t snd_pmac_playback_ops = {
 610         .open =         snd_pmac_playback_open,
 611         .close =        snd_pmac_playback_close,
 612         .ioctl =        snd_pcm_lib_ioctl,
 613         .hw_params =    snd_pmac_pcm_hw_params,
 614         .hw_free =      snd_pmac_pcm_hw_free,
 615         .prepare =      snd_pmac_playback_prepare,
 616         .trigger =      snd_pmac_playback_trigger,
 617         .pointer =      snd_pmac_playback_pointer,
 618 };
 619
 620 static snd_pcm_ops_t snd_pmac_capture_ops = {
 621         .open =         snd_pmac_capture_open,
 622         .close =        snd_pmac_capture_close,
 623         .ioctl =        snd_pcm_lib_ioctl,
 624         .hw_params =    snd_pmac_pcm_hw_params,
 625         .hw_free =      snd_pmac_pcm_hw_free,
 626         .prepare =      snd_pmac_capture_prepare,
 627         .trigger =      snd_pmac_capture_trigger,
 628         .pointer =      snd_pmac_capture_pointer,
 629 };
 630
 631 static void pmac_pcm_free(snd_pcm_t *pcm)
 632 {
 633         snd_pcm_lib_preallocate_free_for_all(pcm);
 634 }
 635
 636 int __init snd_pmac_pcm_new(pmac_t *chip)
 637 {
 638         snd_pcm_t *pcm;
 639         int err;
 640         int num_captures = 1;
 641
 642         if (! chip->can_capture)
 643                 num_captures = 0;
 644         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 645         if (err < 0)
 646                 return err;
 647
 648         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 649         if (chip->can_capture)
 650                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 651
 652         pcm->private_data = chip;
 653         pcm->private_free = pmac_pcm_free;
 654         pcm->info_flags = 0;
 655         strcpy(pcm->name, chip->card->shortname);
 656         chip->pcm = pcm;
 657
 658         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 659         if (chip->can_byte_swap)
 660                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 661
 662         chip->playback.cur_formats = chip->formats_ok;
 663         chip->capture.cur_formats = chip->formats_ok;
 664         chip->playback.cur_freqs = chip->freqs_ok;
 665         chip->capture.cur_freqs = chip->freqs_ok;
 666
 667         /* preallocate 64k buffer */
 668         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
 669                                               snd_dma_continuous_data(GFP_KERNEL),
 670                                               64 * 1024, 64 * 1024);
 671
 672         return 0;
 673 }
 674
 675
 676 static void snd_pmac_dbdma_reset(pmac_t *chip)
 677 {
 678         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 679         snd_pmac_wait_ack(&chip->playback);
 680         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 681         snd_pmac_wait_ack(&chip->capture);
 682 }
 683
 684
 685 /*
 686  * interrupt handlers
 687  */
 688 static irqreturn_t
 689 snd_pmac_tx_intr(int irq, void *devid, struct pt_regs *regs)
 690 {
 691         pmac_t *chip = snd_magic_cast(pmac_t, devid, return IRQ_NONE);
 692         snd_pmac_pcm_update(chip, &chip->playback);
 693         return IRQ_HANDLED;
 694 }
 695
 696
 697 static irqreturn_t
 698 snd_pmac_rx_intr(int irq, void *devid, struct pt_regs *regs)
 699 {
 700         pmac_t *chip = snd_magic_cast(pmac_t, devid, return IRQ_NONE);
 701         snd_pmac_pcm_update(chip, &chip->capture);
 702         return IRQ_HANDLED;
 703 }
 704
 705
 706 static irqreturn_t
 707 snd_pmac_ctrl_intr(int irq, void *devid, struct pt_regs *regs)
 708 {
 709         pmac_t *chip = snd_magic_cast(pmac_t, devid, return IRQ_NONE);
 710         int ctrl = in_le32(&chip->awacs->control);
 711
 712         /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
 713         if (ctrl & MASK_PORTCHG) {
 714                 /* do something when headphone is plugged/unplugged? */
 715                 if (chip->update_automute)
 716                         chip->update_automute(chip, 1);
 717         }
 718         if (ctrl & MASK_CNTLERR) {
 719                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 720                 if (err && chip->model <= PMAC_SCREAMER)
 721                         snd_printk(KERN_DEBUG "error %x\n", err);
 722         }
 723         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 724         out_le32(&chip->awacs->control, ctrl);
 725         return IRQ_HANDLED;
 726 }
 727
 728
 729 /*
 730  * a wrapper to feature call for compatibility
 731  */
 732 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
 733 static void snd_pmac_sound_feature(pmac_t *chip, int enable)
 734 {
 735 #ifdef CONFIG_PPC_HAS_FEATURE_CALLS
 736         ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 737 #else
 738         if (chip->is_pbook_G3) {
 739                 pmu_suspend();
 740                 feature_clear(chip->node, FEATURE_Sound_power);
 741                 feature_clear(chip->node, FEATURE_Sound_CLK_enable);
 742                 big_mdelay(1000); /* XXX */
 743                 pmu_resume();
 744         }
 745         if (chip->is_pbook_3400) {
 746                 feature_set(chip->node, FEATURE_IOBUS_enable);
 747                 udelay(10);
 748         }
 749 #endif
 750 }
 751 #else /* CONFIG_PM && CONFIG_PMAC_PBOOK */
 752 #define snd_pmac_sound_feature(chip,enable) /**/
 753 #endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */
 754
 755 /*
 756  * release resources
 757  */
 758
 759 static int snd_pmac_free(pmac_t *chip)
 760 {
 761         int i;
 762
 763         /* stop sounds */
 764         if (chip->initialized) {
 765                 snd_pmac_dbdma_reset(chip);
 766                 /* disable interrupts from awacs interface */
 767                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 768         }
 769
 770         snd_pmac_sound_feature(chip, 0);
 771 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
 772         snd_pmac_unregister_sleep_notifier(chip);
 773 #endif
 774
 775         /* clean up mixer if any */
 776         if (chip->mixer_free)
 777                 chip->mixer_free(chip);
 778
 779         /* release resources */
 780         if (chip->irq >= 0)
 781                 free_irq(chip->irq, (void*)chip);
 782         if (chip->tx_irq >= 0)
 783                 free_irq(chip->tx_irq, (void*)chip);
 784         if (chip->rx_irq >= 0)
 785                 free_irq(chip->rx_irq, (void*)chip);
 786         snd_pmac_dbdma_free(&chip->playback.cmd);
 787         snd_pmac_dbdma_free(&chip->capture.cmd);
 788         snd_pmac_dbdma_free(&chip->extra_dma);
 789         if (chip->macio_base)
 790                 iounmap(chip->macio_base);
 791         if (chip->latch_base)
 792                 iounmap(chip->latch_base);
 793         if (chip->awacs)
 794                 iounmap((void*)chip->awacs);
 795         if (chip->playback.dma)
 796                 iounmap((void*)chip->playback.dma);
 797         if (chip->capture.dma)
 798                 iounmap((void*)chip->capture.dma);
 799         if (chip->node) {
 800                 for (i = 0; i < 3; i++) {
 801                         if (chip->of_requested & (1 << i))
 802                                 release_OF_resource(chip->node, i);
 803                 }
 804         }
 805         snd_magic_kfree(chip);
 806         return 0;
 807 }
 808
 809
 810 /*
 811  * free the device
 812  */
 813 static int snd_pmac_dev_free(snd_device_t *device)
 814 {
 815         pmac_t *chip = snd_magic_cast(pmac_t, device->device_data, return -ENXIO);
 816         return snd_pmac_free(chip);
 817 }
 818
 819
 820 /*
 821  * check the machine support byteswap (little-endian)
 822  */
 823
 824 static void __init detect_byte_swap(pmac_t *chip)
 825 {
 826         struct device_node *mio;
 827
 828         /* if seems that Keylargo can't byte-swap  */
 829         for (mio = chip->node->parent; mio; mio = mio->parent) {
 830                 if (strcmp(mio->name, "mac-io") == 0) {
 831                         if (device_is_compatible(mio, "Keylargo"))
 832                                 chip->can_byte_swap = 0;
 833                         break;
 834                 }
 835         }
 836
 837         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 838         if (machine_is_compatible("PowerBook3,1") ||
 839             machine_is_compatible("PowerBook2,1"))
 840                 chip->can_byte_swap = 0 ;
 841
 842         if (machine_is_compatible("PowerBook2,1"))
 843                 chip->can_duplex = 0;
 844 }
 845
 846
 847 /*
 848  * detect a sound chip
 849  */
 850 static int __init snd_pmac_detect(pmac_t *chip)
 851 {
 852         struct device_node *sound;
 853         unsigned int *prop, l;
 854
 855         if (_machine != _MACH_Pmac)
 856                 return -ENODEV;
 857
 858         chip->subframe = 0;
 859         chip->revision = 0;
 860         chip->freqs_ok = 0xff; /* all ok */
 861         chip->model = PMAC_AWACS;
 862         chip->can_byte_swap = 1;
 863         chip->can_duplex = 1;
 864         chip->can_capture = 1;
 865         chip->num_freqs = 8;
 866         chip->freq_table = awacs_freqs;
 867
 868         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 869
 870         /* check machine type */
 871         if (machine_is_compatible("AAPL,3400/2400")
 872             || machine_is_compatible("AAPL,3500"))
 873                 chip->is_pbook_3400 = 1;
 874         else if (machine_is_compatible("PowerBook1,1")
 875                  || machine_is_compatible("AAPL,PowerBook1998"))
 876                 chip->is_pbook_G3 = 1;
 877         chip->node = find_devices("awacs");
 878         if (chip->node)
 879                 return 0; /* ok */
 880
 881         /*
 882          * powermac G3 models have a node called "davbus"
 883          * with a child called "sound".
 884          */
 885         chip->node = find_devices("davbus");
 886         /*
 887          * if we didn't find a davbus device, try 'i2s-a' since
 888          * this seems to be what iBooks have
 889          */
 890         if (! chip->node)
 891                 chip->node = find_devices("i2s-a");
 892         if (! chip->node)
 893                 return -ENODEV;
 894         sound = find_devices("sound");
 895         while (sound && sound->parent != chip->node)
 896                 sound = sound->next;
 897         if (! sound)
 898                 return -ENODEV;
 899         prop = (unsigned int *) get_property(sound, "sub-frame", 0);
 900         if (prop && *prop < 16)
 901                 chip->subframe = *prop;
 902         /* This should be verified on older screamers */
 903         if (device_is_compatible(sound, "screamer")) {
 904                 chip->model = PMAC_SCREAMER;
 905                 // chip->can_byte_swap = 0; /* FIXME: check this */
 906         }
 907         if (device_is_compatible(sound, "burgundy")) {
 908                 chip->model = PMAC_BURGUNDY;
 909                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 910         }
 911         if (device_is_compatible(sound, "daca")) {
 912                 chip->model = PMAC_DACA;
 913                 chip->can_capture = 0;  /* no capture */
 914                 chip->can_duplex = 0;
 915                 // chip->can_byte_swap = 0; /* FIXME: check this */
 916                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 917         }
 918         if (device_is_compatible(sound, "tumbler")) {
 919                 chip->model = PMAC_TUMBLER;
 920                 chip->can_capture = 0;  /* no capture */
 921                 chip->can_duplex = 0;
 922                 // chip->can_byte_swap = 0; /* FIXME: check this */
 923                 chip->num_freqs = 2;
 924                 chip->freq_table = tumbler_freqs;
 925                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 926         }
 927         if (device_is_compatible(sound, "snapper")) {
 928                 chip->model = PMAC_SNAPPER;
 929                 // chip->can_byte_swap = 0; /* FIXME: check this */
 930                 chip->num_freqs = 2;
 931                 chip->freq_table = tumbler_freqs;
 932                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 933         }
 934         prop = (unsigned int *)get_property(sound, "device-id", 0);
 935         if (prop)
 936                 chip->device_id = *prop;
 937         chip->has_iic = (find_devices("perch") != NULL);
 938
 939         detect_byte_swap(chip);
 940
 941         /* look for a property saying what sample rates
 942            are available */
 943         prop = (unsigned int *) get_property(sound, "sample-rates", &l);
 944         if (! prop)
 945                 prop = (unsigned int *) get_property(sound, "output-frame-rates", &l);
 946         if (prop) {
 947                 int i;
 948                 chip->freqs_ok = 0;
 949                 for (l /= sizeof(int); l > 0; --l) {
 950                         unsigned int r = *prop++;
 951                         /* Apple 'Fixed' format */
 952                         if (r >= 0x10000)
 953                                 r >>= 16;
 954                         for (i = 0; i < chip->num_freqs; ++i) {
 955                                 if (r == chip->freq_table[i]) {
 956                                         chip->freqs_ok |= (1 << i);
 957                                         break;
 958                                 }
 959                         }
 960                 }
 961         } else {
 962                 /* assume only 44.1khz */
 963                 chip->freqs_ok = 1;
 964         }
 965
 966         return 0;
 967 }
 968
 969 /*
 970  * exported - boolean info callbacks for ease of programming
 971  */
 972 int snd_pmac_boolean_stereo_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
 973 {
 974         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 975         uinfo->count = 2;
 976         uinfo->value.integer.min = 0;
 977         uinfo->value.integer.max = 1;
 978         return 0;
 979 }
 980
 981 int snd_pmac_boolean_mono_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
 982 {
 983         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 984         uinfo->count = 1;
 985         uinfo->value.integer.min = 0;
 986         uinfo->value.integer.max = 1;
 987         return 0;
 988 }
 989
 990 #ifdef PMAC_SUPPORT_AUTOMUTE
 991 /*
 992  * auto-mute
 993  */
 994 static int pmac_auto_mute_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
 995 {
 996         pmac_t *chip = snd_kcontrol_chip(kcontrol);
 997         ucontrol->value.integer.value[0] = chip->auto_mute;
 998         return 0;
 999 }
1000
1001 static int pmac_auto_mute_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1002 {
1003         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1004         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1005                 chip->auto_mute = ucontrol->value.integer.value[0];
1006                 if (chip->update_automute)
1007                         chip->update_automute(chip, 1);
1008                 return 1;
1009         }
1010         return 0;
1011 }
1012
1013 static int pmac_hp_detect_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1014 {
1015         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1016         if (chip->detect_headphone)
1017                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1018         else
1019                 ucontrol->value.integer.value[0] = 0;
1020         return 0;
1021 }
1022
1023 static snd_kcontrol_new_t auto_mute_controls[] __initdata = {
1024         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1025           .name = "Auto Mute Switch",
1026           .info = snd_pmac_boolean_mono_info,
1027           .get = pmac_auto_mute_get,
1028           .put = pmac_auto_mute_put,
1029         },
1030         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1031           .name = "Headphone Detection",
1032           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1033           .info = snd_pmac_boolean_mono_info,
1034           .get = pmac_hp_detect_get,
1035         },
1036 };
1037
1038 int __init snd_pmac_add_automute(pmac_t *chip)
1039 {
1040         int err;
1041         chip->auto_mute = 1;
1042         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1043         if (err < 0)
1044                 return err;
1045         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1046         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1047 }
1048 #endif /* PMAC_SUPPORT_AUTOMUTE */
1049
1050 /*
1051  * create and detect a pmac chip record
1052  */
1053 int __init snd_pmac_new(snd_card_t *card, pmac_t **chip_return)
1054 {
1055         pmac_t *chip;
1056         struct device_node *np;
1057         int i, err;
1058         static snd_device_ops_t ops = {
1059                 .dev_free =     snd_pmac_dev_free,
1060         };
1061
1062         snd_runtime_check(chip_return, return -EINVAL);
1063         *chip_return = NULL;
1064
1065         chip = snd_magic_kcalloc(pmac_t, 0, GFP_KERNEL);
1066         if (chip == NULL)
1067                 return -ENOMEM;
1068         chip->card = card;
1069
1070         spin_lock_init(&chip->reg_lock);
1071         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1072
1073         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1074         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1075
1076         if ((err = snd_pmac_detect(chip)) < 0)
1077                 goto __error;
1078
1079         if (snd_pmac_dbdma_alloc(&chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1080             snd_pmac_dbdma_alloc(&chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1081             snd_pmac_dbdma_alloc(&chip->extra_dma, 2) < 0) {
1082                 err = -ENOMEM;
1083                 goto __error;
1084         }
1085
1086         np = chip->node;
1087         if (np->n_addrs < 3 || np->n_intrs < 3) {
1088                 err = -ENODEV;
1089                 goto __error;
1090         }
1091
1092         for (i = 0; i < 3; i++) {
1093                 static char *name[3] = { NULL, "- Tx DMA", "- Rx DMA" };
1094                 if (! request_OF_resource(np, i, name[i])) {
1095                         snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
1096                         err = -ENODEV;
1097                         goto __error;
1098                 }
1099                 chip->of_requested |= (1 << i);
1100         }
1101
1102         chip->awacs = (volatile struct awacs_regs *) ioremap(np->addrs[0].address, 0x1000);
1103         chip->playback.dma = (volatile struct dbdma_regs *) ioremap(np->addrs[1].address, 0x100);
1104         chip->capture.dma = (volatile struct dbdma_regs *) ioremap(np->addrs[2].address, 0x100);
1105         if (chip->model <= PMAC_BURGUNDY) {
1106                 if (request_irq(np->intrs[0].line, snd_pmac_ctrl_intr, 0,
1107                                 "PMac", (void*)chip)) {
1108                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[0].line);
1109                         err = -EBUSY;
1110                         goto __error;
1111                 }
1112                 chip->irq = np->intrs[0].line;
1113         }
1114         if (request_irq(np->intrs[1].line, snd_pmac_tx_intr, 0,
1115                         "PMac Output", (void*)chip)) {
1116                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[1].line);
1117                 err = -EBUSY;
1118                 goto __error;
1119         }
1120         chip->tx_irq = np->intrs[1].line;
1121         if (request_irq(np->intrs[2].line, snd_pmac_rx_intr, 0,
1122                         "PMac Input", (void*)chip)) {
1123                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[2].line);
1124                 err = -EBUSY;
1125                 goto __error;
1126         }
1127         chip->rx_irq = np->intrs[2].line;
1128
1129         snd_pmac_sound_feature(chip, 1);
1130
1131         /* reset */
1132         out_le32(&chip->awacs->control, 0x11);
1133
1134         /* Powerbooks have odd ways of enabling inputs such as
1135            an expansion-bay CD or sound from an internal modem
1136            or a PC-card modem. */
1137         if (chip->is_pbook_3400) {
1138                 /* Enable CD and PC-card sound inputs. */
1139                 /* This is done by reading from address
1140                  * f301a000, + 0x10 to enable the expansion-bay
1141                  * CD sound input, + 0x80 to enable the PC-card
1142                  * sound input.  The 0x100 enables the SCSI bus
1143                  * terminator power.
1144                  */
1145                 chip->latch_base = (unsigned char *) ioremap (0xf301a000, 0x1000);
1146                 in_8(chip->latch_base + 0x190);
1147         } else if (chip->is_pbook_G3) {
1148                 struct device_node* mio;
1149                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1150                         if (strcmp(mio->name, "mac-io") == 0
1151                             && mio->n_addrs > 0) {
1152                                 chip->macio_base = (unsigned char *) ioremap
1153                                         (mio->addrs[0].address, 0x40);
1154                                 break;
1155                         }
1156                 }
1157                 /* Enable CD sound input. */
1158                 /* The relevant bits for writing to this byte are 0x8f.
1159                  * I haven't found out what the 0x80 bit does.
1160                  * For the 0xf bits, writing 3 or 7 enables the CD
1161                  * input, any other value disables it.  Values
1162                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1163                  * 4, 6, 8 - f enable the input from the modem.
1164                  */
1165                 if (chip->macio_base)
1166                         out_8(chip->macio_base + 0x37, 3);
1167         }
1168
1169         /* Reset dbdma channels */
1170         snd_pmac_dbdma_reset(chip);
1171
1172 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1173         /* add sleep notifier */
1174         if (! snd_pmac_register_sleep_notifier(chip))
1175                 snd_card_set_pm_callback(chip->card, snd_pmac_suspend, snd_pmac_resume, chip);
1176 #endif
1177
1178         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1179                 goto __error;
1180
1181         *chip_return = chip;
1182         return 0;
1183
1184  __error:
1185         snd_pmac_free(chip);
1186         return err;
1187 }
1188
1189
1190 /*
1191  * sleep notify for powerbook
1192  */
1193
1194 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1195
1196 /*
1197  * Save state when going to sleep, restore it afterwards.
1198  */
1199
1200 static int snd_pmac_suspend(snd_card_t *card, unsigned int state)
1201 {
1202         pmac_t *chip = snd_magic_cast(pmac_t, card->pm_private_data, return -EINVAL);
1203         unsigned long flags;
1204
1205         if (chip->suspend)
1206                 chip->suspend(chip);
1207         snd_pcm_suspend_all(chip->pcm);
1208         spin_lock_irqsave(&chip->reg_lock, flags);
1209         snd_pmac_beep_stop(chip);
1210         spin_unlock_irqrestore(&chip->reg_lock, flags);
1211         if (chip->irq >= 0)
1212                 disable_irq(chip->irq);
1213         if (chip->tx_irq >= 0)
1214                 disable_irq(chip->tx_irq);
1215         if (chip->rx_irq >= 0)
1216                 disable_irq(chip->rx_irq);
1217         snd_pmac_sound_feature(chip, 0);
1218         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1219         return 0;
1220 }
1221
1222 static int snd_pmac_resume(snd_card_t *card, unsigned int state)
1223 {
1224         pmac_t *chip = snd_magic_cast(pmac_t, card->pm_private_data, return -EINVAL);
1225
1226         snd_pmac_sound_feature(chip, 1);
1227         if (chip->resume)
1228                 chip->resume(chip);
1229         /* enable CD sound input */
1230         if (chip->macio_base && chip->is_pbook_G3) {
1231                 out_8(chip->macio_base + 0x37, 3);
1232         } else if (chip->is_pbook_3400) {
1233                 in_8(chip->latch_base + 0x190);
1234         }
1235
1236         snd_pmac_pcm_set_format(chip);
1237
1238         if (chip->irq >= 0)
1239                 enable_irq(chip->irq);
1240         if (chip->tx_irq >= 0)
1241                 enable_irq(chip->tx_irq);
1242         if (chip->rx_irq >= 0)
1243                 enable_irq(chip->rx_irq);
1244
1245         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1246         return 0;
1247 }
1248
1249 /* the chip is stored statically by snd_pmac_register_sleep_notifier
1250  * because we can't have any private data for notify callback.
1251  */
1252 static pmac_t *sleeping_pmac = NULL;
1253
1254 static int snd_pmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
1255 {
1256         pmac_t *chip;
1257
1258         chip = sleeping_pmac;
1259         snd_runtime_check(chip, return 0);
1260
1261         switch (when) {
1262         case PBOOK_SLEEP_NOW:
1263                 snd_pmac_suspend(chip->card, 0);
1264                 break;
1265         case PBOOK_WAKE:
1266                 snd_pmac_resume(chip->card, 0);
1267                 break;
1268         }
1269         return PBOOK_SLEEP_OK;
1270 }
1271
1272 static struct pmu_sleep_notifier snd_pmac_sleep_notifier = {
1273         snd_pmac_sleep_notify, SLEEP_LEVEL_SOUND,
1274 };
1275
1276 static int __init snd_pmac_register_sleep_notifier(pmac_t *chip)
1277 {
1278         /* should be protected here.. */
1279         snd_assert(! sleeping_pmac, return -EBUSY);
1280         sleeping_pmac = chip;
1281         pmu_register_sleep_notifier(&snd_pmac_sleep_notifier);
1282         return 0;
1283 }
1284
1285 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip)
1286 {
1287         /* should be protected here.. */
1288         snd_assert(sleeping_pmac == chip, return -ENODEV);
1289         pmu_unregister_sleep_notifier(&snd_pmac_sleep_notifier);
1290         sleeping_pmac = NULL;
1291         return 0;
1292 }
1293
1294 #endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */