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
  40 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
  41 static int snd_pmac_register_sleep_notifier(pmac_t *chip);
  42 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip);
  43 static int snd_pmac_suspend(snd_card_t *card, unsigned int state);
  44 static int snd_pmac_resume(snd_card_t *card, unsigned int state);
  45 #endif
  46
  47
  48 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  49 static int awacs_freqs[8] = {
  50         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  51 };
  52 /* fixed frequency table for tumbler */
  53 static int tumbler_freqs[1] = {
  54         44100
  55 };
  56
  57 /*
  58  * allocate DBDMA command arrays
  59  */
  60 static int snd_pmac_dbdma_alloc(pmac_dbdma_t *rec, int size)
  61 {
  62         rec->space = kmalloc(sizeof(struct dbdma_cmd) * (size + 1), GFP_KERNEL);
  63         if (rec->space == NULL)
  64                 return -ENOMEM;
  65         rec->size = size;
  66         memset(rec->space, 0, sizeof(struct dbdma_cmd) * (size + 1));
  67         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
  68         rec->addr = virt_to_bus(rec->cmds);
  69         return 0;
  70 }
  71
  72 static void snd_pmac_dbdma_free(pmac_dbdma_t *rec)
  73 {
  74         if (rec)
  75                 kfree(rec->space);
  76 }
  77
  78
  79 /*
  80  * pcm stuff
  81  */
  82
  83 /*
  84  * look up frequency table
  85  */
  86
  87 unsigned int snd_pmac_rate_index(pmac_t *chip, pmac_stream_t *rec, unsigned int rate)
  88 {
  89         int i, ok, found;
  90
  91         ok = rec->cur_freqs;
  92         if (rate > chip->freq_table[0])
  93                 return 0;
  94         found = 0;
  95         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
  96                 if (! (ok & 1)) continue;
  97                 found = i;
  98                 if (rate >= chip->freq_table[i])
  99                         break;
 100         }
 101         return found;
 102 }
 103
 104 /*
 105  * check whether another stream is active
 106  */
 107 static inline int another_stream(int stream)
 108 {
 109         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 110                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 111 }
 112
 113 /*
 114  * allocate buffers
 115  */
 116 static int snd_pmac_pcm_hw_params(snd_pcm_substream_t *subs,
 117                                   snd_pcm_hw_params_t *hw_params)
 118 {
 119         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 120 }
 121
 122 /*
 123  * release buffers
 124  */
 125 static int snd_pmac_pcm_hw_free(snd_pcm_substream_t *subs)
 126 {
 127         snd_pcm_lib_free_pages(subs);
 128         return 0;
 129 }
 130
 131 /*
 132  * get a stream of the opposite direction
 133  */
 134 static pmac_stream_t *snd_pmac_get_stream(pmac_t *chip, int stream)
 135 {
 136         switch (stream) {
 137         case SNDRV_PCM_STREAM_PLAYBACK:
 138                 return &chip->playback;
 139         case SNDRV_PCM_STREAM_CAPTURE:
 140                 return &chip->capture;
 141         default:
 142                 snd_BUG();
 143                 return NULL;
 144         }
 145 }
 146
 147 /*
 148  * wait while run status is on
 149  */
 150 inline static void
 151 snd_pmac_wait_ack(pmac_stream_t *rec)
 152 {
 153         int timeout = 50000;
 154         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 155                 udelay(1);
 156 }
 157
 158 /*
 159  * set the format and rate to the chip.
 160  * call the lowlevel function if defined (e.g. for AWACS).
 161  */
 162 static void snd_pmac_pcm_set_format(pmac_t *chip)
 163 {
 164         /* set up frequency and format */
 165         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 166         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 167         if (chip->set_format)
 168                 chip->set_format(chip);
 169 }
 170
 171 /*
 172  * stop the DMA transfer
 173  */
 174 inline static void snd_pmac_dma_stop(pmac_stream_t *rec)
 175 {
 176         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 177         snd_pmac_wait_ack(rec);
 178 }
 179
 180 /*
 181  * set the command pointer address
 182  */
 183 inline static void snd_pmac_dma_set_command(pmac_stream_t *rec, pmac_dbdma_t *cmd)
 184 {
 185         out_le32(&rec->dma->cmdptr, cmd->addr);
 186 }
 187
 188 /*
 189  * start the DMA
 190  */
 191 inline static void snd_pmac_dma_run(pmac_stream_t *rec, int status)
 192 {
 193         out_le32(&rec->dma->control, status | (status << 16));
 194 }
 195
 196
 197 /*
 198  * prepare playback/capture stream
 199  */
 200 static int snd_pmac_pcm_prepare(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 201 {
 202         int i;
 203         volatile struct dbdma_cmd __iomem *cp;
 204         snd_pcm_runtime_t *runtime = subs->runtime;
 205         int rate_index;
 206         long offset;
 207         pmac_stream_t *astr;
 208
 209         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 210         rec->period_size = snd_pcm_lib_period_bytes(subs);
 211         rec->nperiods = rec->dma_size / rec->period_size;
 212         rec->cur_period = 0;
 213         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 214
 215         /* set up constraints */
 216         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 217         snd_runtime_check(astr, return -EINVAL);
 218         astr->cur_freqs = 1 << rate_index;
 219         astr->cur_formats = 1 << runtime->format;
 220         chip->rate_index = rate_index;
 221         chip->format = runtime->format;
 222
 223         /* We really want to execute a DMA stop command, after the AWACS
 224          * is initialized.
 225          * For reasons I don't understand, it stops the hissing noise
 226          * common to many PowerBook G3 systems and random noise otherwise
 227          * captured on iBook2's about every third time. -ReneR
 228          */
 229         spin_lock_irq(&chip->reg_lock);
 230         snd_pmac_dma_stop(rec);
 231         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 232         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 233         snd_pmac_dma_run(rec, RUN);
 234         spin_unlock_irq(&chip->reg_lock);
 235         mdelay(5);
 236         spin_lock_irq(&chip->reg_lock);
 237         /* continuous DMA memory type doesn't provide the physical address,
 238          * so we need to resolve the address here...
 239          */
 240         offset = virt_to_bus(runtime->dma_area);
 241         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 242                 st_le32(&cp->phy_addr, offset);
 243                 st_le16(&cp->req_count, rec->period_size);
 244                 /*st_le16(&cp->res_count, 0);*/
 245                 st_le16(&cp->xfer_status, 0);
 246                 offset += rec->period_size;
 247         }
 248         /* make loop */
 249         st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
 250         st_le32(&cp->cmd_dep, rec->cmd.addr);
 251
 252         snd_pmac_dma_stop(rec);
 253         snd_pmac_dma_set_command(rec, &rec->cmd);
 254         spin_unlock_irq(&chip->reg_lock);
 255
 256         return 0;
 257 }
 258
 259
 260 /*
 261  * PCM trigger/stop
 262  */
 263 static int snd_pmac_pcm_trigger(pmac_t *chip, pmac_stream_t *rec,
 264                                 snd_pcm_substream_t *subs, int cmd)
 265 {
 266         volatile struct dbdma_cmd __iomem *cp;
 267         int i, command;
 268
 269         switch (cmd) {
 270         case SNDRV_PCM_TRIGGER_START:
 271         case SNDRV_PCM_TRIGGER_RESUME:
 272                 if (rec->running)
 273                         return -EBUSY;
 274                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 275                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 276                 spin_lock(&chip->reg_lock);
 277                 snd_pmac_beep_stop(chip);
 278                 snd_pmac_pcm_set_format(chip);
 279                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 280                         out_le16(&cp->command, command);
 281                 snd_pmac_dma_set_command(rec, &rec->cmd);
 282                 (void)in_le32(&rec->dma->status);
 283                 snd_pmac_dma_run(rec, RUN|WAKE);
 284                 rec->running = 1;
 285                 spin_unlock(&chip->reg_lock);
 286                 break;
 287
 288         case SNDRV_PCM_TRIGGER_STOP:
 289         case SNDRV_PCM_TRIGGER_SUSPEND:
 290                 spin_lock(&chip->reg_lock);
 291                 rec->running = 0;
 292                 /*printk("stopped!!\n");*/
 293                 snd_pmac_dma_stop(rec);
 294                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 295                         out_le16(&cp->command, DBDMA_STOP);
 296                 spin_unlock(&chip->reg_lock);
 297                 break;
 298
 299         default:
 300                 return -EINVAL;
 301         }
 302
 303         return 0;
 304 }
 305
 306 /*
 307  * return the current pointer
 308  */
 309 inline
 310 static snd_pcm_uframes_t snd_pmac_pcm_pointer(pmac_t *chip, pmac_stream_t *rec,
 311                                               snd_pcm_substream_t *subs)
 312 {
 313         int count = 0;
 314
 315 #if 1 /* hmm.. how can we get the current dma pointer?? */
 316         int stat;
 317         volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
 318         stat = ld_le16(&cp->xfer_status);
 319         if (stat & (ACTIVE|DEAD)) {
 320                 count = in_le16(&cp->res_count);
 321                 if (count)
 322                         count = rec->period_size - count;
 323         }
 324 #endif
 325         count += rec->cur_period * rec->period_size;
 326         /*printk("pointer=%d\n", count);*/
 327         return bytes_to_frames(subs->runtime, count);
 328 }
 329
 330 /*
 331  * playback
 332  */
 333
 334 static int snd_pmac_playback_prepare(snd_pcm_substream_t *subs)
 335 {
 336         pmac_t *chip = snd_pcm_substream_chip(subs);
 337         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
 338 }
 339
 340 static int snd_pmac_playback_trigger(snd_pcm_substream_t *subs,
 341                                      int cmd)
 342 {
 343         pmac_t *chip = snd_pcm_substream_chip(subs);
 344         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
 345 }
 346
 347 static snd_pcm_uframes_t snd_pmac_playback_pointer(snd_pcm_substream_t *subs)
 348 {
 349         pmac_t *chip = snd_pcm_substream_chip(subs);
 350         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
 351 }
 352
 353
 354 /*
 355  * capture
 356  */
 357
 358 static int snd_pmac_capture_prepare(snd_pcm_substream_t *subs)
 359 {
 360         pmac_t *chip = snd_pcm_substream_chip(subs);
 361         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
 362 }
 363
 364 static int snd_pmac_capture_trigger(snd_pcm_substream_t *subs,
 365                                     int cmd)
 366 {
 367         pmac_t *chip = snd_pcm_substream_chip(subs);
 368         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
 369 }
 370
 371 static snd_pcm_uframes_t snd_pmac_capture_pointer(snd_pcm_substream_t *subs)
 372 {
 373         pmac_t *chip = snd_pcm_substream_chip(subs);
 374         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
 375 }
 376
 377
 378 /*
 379  * update playback/capture pointer from interrupts
 380  */
 381 static void snd_pmac_pcm_update(pmac_t *chip, pmac_stream_t *rec)
 382 {
 383         volatile struct dbdma_cmd __iomem *cp;
 384         int c;
 385         int stat;
 386
 387         spin_lock(&chip->reg_lock);
 388         if (rec->running) {
 389                 cp = &rec->cmd.cmds[rec->cur_period];
 390                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
 391                         stat = ld_le16(&cp->xfer_status);
 392                         if (! (stat & ACTIVE))
 393                                 break;
 394                         /*printk("update frag %d\n", rec->cur_period);*/
 395                         st_le16(&cp->xfer_status, 0);
 396                         st_le16(&cp->req_count, rec->period_size);
 397                         /*st_le16(&cp->res_count, 0);*/
 398                         rec->cur_period++;
 399                         if (rec->cur_period >= rec->nperiods) {
 400                                 rec->cur_period = 0;
 401                                 cp = rec->cmd.cmds;
 402                         } else
 403                                 cp++;
 404                         spin_unlock(&chip->reg_lock);
 405                         snd_pcm_period_elapsed(rec->substream);
 406                         spin_lock(&chip->reg_lock);
 407                 }
 408         }
 409         spin_unlock(&chip->reg_lock);
 410 }
 411
 412
 413 /*
 414  * hw info
 415  */
 416
 417 static snd_pcm_hardware_t snd_pmac_playback =
 418 {
 419         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 420                                  SNDRV_PCM_INFO_MMAP |
 421                                  SNDRV_PCM_INFO_MMAP_VALID |
 422                                  SNDRV_PCM_INFO_RESUME),
 423         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 424         .rates =                SNDRV_PCM_RATE_8000_44100,
 425         .rate_min =             7350,
 426         .rate_max =             44100,
 427         .channels_min =         2,
 428         .channels_max =         2,
 429         .buffer_bytes_max =     131072,
 430         .period_bytes_min =     256,
 431         .period_bytes_max =     16384,
 432         .periods_min =          3,
 433         .periods_max =          PMAC_MAX_FRAGS,
 434 };
 435
 436 static snd_pcm_hardware_t snd_pmac_capture =
 437 {
 438         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 439                                  SNDRV_PCM_INFO_MMAP |
 440                                  SNDRV_PCM_INFO_MMAP_VALID |
 441                                  SNDRV_PCM_INFO_RESUME),
 442         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 443         .rates =                SNDRV_PCM_RATE_8000_44100,
 444         .rate_min =             7350,
 445         .rate_max =             44100,
 446         .channels_min =         2,
 447         .channels_max =         2,
 448         .buffer_bytes_max =     131072,
 449         .period_bytes_min =     256,
 450         .period_bytes_max =     16384,
 451         .periods_min =          3,
 452         .periods_max =          PMAC_MAX_FRAGS,
 453 };
 454
 455
 456 #if 0 // NYI
 457 static int snd_pmac_hw_rule_rate(snd_pcm_hw_params_t *params,
 458                                  snd_pcm_hw_rule_t *rule)
 459 {
 460         pmac_t *chip = rule->private;
 461         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 462         int i, freq_table[8], num_freqs;
 463
 464         snd_runtime_check(rec, return -EINVAL);
 465         num_freqs = 0;
 466         for (i = chip->num_freqs - 1; i >= 0; i--) {
 467                 if (rec->cur_freqs & (1 << i))
 468                         freq_table[num_freqs++] = chip->freq_table[i];
 469         }
 470
 471         return snd_interval_list(hw_param_interval(params, rule->var),
 472                                  num_freqs, freq_table, 0);
 473 }
 474
 475 static int snd_pmac_hw_rule_format(snd_pcm_hw_params_t *params,
 476                                    snd_pcm_hw_rule_t *rule)
 477 {
 478         pmac_t *chip = rule->private;
 479         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 480
 481         snd_runtime_check(rec, return -EINVAL);
 482         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 483                                    rec->cur_formats);
 484 }
 485 #endif // NYI
 486
 487 static int snd_pmac_pcm_open(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 488 {
 489         snd_pcm_runtime_t *runtime = subs->runtime;
 490         int i, j, fflags;
 491         static int typical_freqs[] = {
 492                 44100,
 493                 22050,
 494                 11025,
 495                 0,
 496         };
 497         static int typical_freq_flags[] = {
 498                 SNDRV_PCM_RATE_44100,
 499                 SNDRV_PCM_RATE_22050,
 500                 SNDRV_PCM_RATE_11025,
 501                 0,
 502         };
 503
 504         /* look up frequency table and fill bit mask */
 505         runtime->hw.rates = 0;
 506         fflags = chip->freqs_ok;
 507         for (i = 0; typical_freqs[i]; i++) {
 508                 for (j = 0; j < chip->num_freqs; j++) {
 509                         if ((chip->freqs_ok & (1 << j)) &&
 510                             chip->freq_table[j] == typical_freqs[i]) {
 511                                 runtime->hw.rates |= typical_freq_flags[i];
 512                                 fflags &= ~(1 << j);
 513                                 break;
 514                         }
 515                 }
 516         }
 517         if (fflags) /* rest */
 518                 runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
 519
 520         /* check for minimum and maximum rates */
 521         for (i = 0; i < chip->num_freqs; i++) {
 522                 if (chip->freqs_ok & (1 << i)) {
 523                         runtime->hw.rate_max = chip->freq_table[i];
 524                         break;
 525                 }
 526         }
 527         for (i = chip->num_freqs - 1; i >= 0; i--) {
 528                 if (chip->freqs_ok & (1 << i)) {
 529                         runtime->hw.rate_min = chip->freq_table[i];
 530                         break;
 531                 }
 532         }
 533         runtime->hw.formats = chip->formats_ok;
 534         if (chip->can_capture) {
 535                 if (! chip->can_duplex)
 536                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 537                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 538         }
 539         runtime->private_data = rec;
 540         rec->substream = subs;
 541
 542 #if 0 /* FIXME: still under development.. */
 543         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 544                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 545         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 546                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
 547 #endif
 548
 549         runtime->hw.periods_max = rec->cmd.size - 1;
 550
 551         if (chip->can_duplex)
 552                 snd_pcm_set_sync(subs);
 553
 554         /* constraints to fix choppy sound */
 555         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 556         return 0;
 557 }
 558
 559 static int snd_pmac_pcm_close(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
 560 {
 561         pmac_stream_t *astr;
 562
 563         snd_pmac_dma_stop(rec);
 564
 565         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 566         snd_runtime_check(astr, return -EINVAL);
 567
 568         /* reset constraints */
 569         astr->cur_freqs = chip->freqs_ok;
 570         astr->cur_formats = chip->formats_ok;
 571
 572         return 0;
 573 }
 574
 575 static int snd_pmac_playback_open(snd_pcm_substream_t *subs)
 576 {
 577         pmac_t *chip = snd_pcm_substream_chip(subs);
 578
 579         subs->runtime->hw = snd_pmac_playback;
 580         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 581 }
 582
 583 static int snd_pmac_capture_open(snd_pcm_substream_t *subs)
 584 {
 585         pmac_t *chip = snd_pcm_substream_chip(subs);
 586
 587         subs->runtime->hw = snd_pmac_capture;
 588         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 589 }
 590
 591 static int snd_pmac_playback_close(snd_pcm_substream_t *subs)
 592 {
 593         pmac_t *chip = snd_pcm_substream_chip(subs);
 594
 595         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 596 }
 597
 598 static int snd_pmac_capture_close(snd_pcm_substream_t *subs)
 599 {
 600         pmac_t *chip = snd_pcm_substream_chip(subs);
 601
 602         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 603 }
 604
 605 /*
 606  */
 607
 608 static snd_pcm_ops_t snd_pmac_playback_ops = {
 609         .open =         snd_pmac_playback_open,
 610         .close =        snd_pmac_playback_close,
 611         .ioctl =        snd_pcm_lib_ioctl,
 612         .hw_params =    snd_pmac_pcm_hw_params,
 613         .hw_free =      snd_pmac_pcm_hw_free,
 614         .prepare =      snd_pmac_playback_prepare,
 615         .trigger =      snd_pmac_playback_trigger,
 616         .pointer =      snd_pmac_playback_pointer,
 617 };
 618
 619 static snd_pcm_ops_t snd_pmac_capture_ops = {
 620         .open =         snd_pmac_capture_open,
 621         .close =        snd_pmac_capture_close,
 622         .ioctl =        snd_pcm_lib_ioctl,
 623         .hw_params =    snd_pmac_pcm_hw_params,
 624         .hw_free =      snd_pmac_pcm_hw_free,
 625         .prepare =      snd_pmac_capture_prepare,
 626         .trigger =      snd_pmac_capture_trigger,
 627         .pointer =      snd_pmac_capture_pointer,
 628 };
 629
 630 static void pmac_pcm_free(snd_pcm_t *pcm)
 631 {
 632         snd_pcm_lib_preallocate_free_for_all(pcm);
 633 }
 634
 635 int __init snd_pmac_pcm_new(pmac_t *chip)
 636 {
 637         snd_pcm_t *pcm;
 638         int err;
 639         int num_captures = 1;
 640
 641         if (! chip->can_capture)
 642                 num_captures = 0;
 643         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 644         if (err < 0)
 645                 return err;
 646
 647         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 648         if (chip->can_capture)
 649                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 650
 651         pcm->private_data = chip;
 652         pcm->private_free = pmac_pcm_free;
 653         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 654         strcpy(pcm->name, chip->card->shortname);
 655         chip->pcm = pcm;
 656
 657         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 658         if (chip->can_byte_swap)
 659                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 660
 661         chip->playback.cur_formats = chip->formats_ok;
 662         chip->capture.cur_formats = chip->formats_ok;
 663         chip->playback.cur_freqs = chip->freqs_ok;
 664         chip->capture.cur_freqs = chip->freqs_ok;
 665
 666         /* preallocate 64k buffer */
 667         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
 668                                               snd_dma_continuous_data(GFP_KERNEL),
 669                                               64 * 1024, 64 * 1024);
 670
 671         return 0;
 672 }
 673
 674
 675 static void snd_pmac_dbdma_reset(pmac_t *chip)
 676 {
 677         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 678         snd_pmac_wait_ack(&chip->playback);
 679         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 680         snd_pmac_wait_ack(&chip->capture);
 681 }
 682
 683
 684 /*
 685  * handling beep
 686  */
 687 void snd_pmac_beep_dma_start(pmac_t *chip, int bytes, unsigned long addr, int speed)
 688 {
 689         pmac_stream_t *rec = &chip->playback;
 690
 691         snd_pmac_dma_stop(rec);
 692         st_le16(&chip->extra_dma.cmds->req_count, bytes);
 693         st_le16(&chip->extra_dma.cmds->xfer_status, 0);
 694         st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
 695         st_le32(&chip->extra_dma.cmds->phy_addr, addr);
 696         st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
 697         out_le32(&chip->awacs->control,
 698                  (in_le32(&chip->awacs->control) & ~0x1f00)
 699                  | (speed << 8));
 700         out_le32(&chip->awacs->byteswap, 0);
 701         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 702         snd_pmac_dma_run(rec, RUN);
 703 }
 704
 705 void snd_pmac_beep_dma_stop(pmac_t *chip)
 706 {
 707         snd_pmac_dma_stop(&chip->playback);
 708         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 709         snd_pmac_pcm_set_format(chip); /* reset format */
 710 }
 711
 712
 713 /*
 714  * interrupt handlers
 715  */
 716 static irqreturn_t
 717 snd_pmac_tx_intr(int irq, void *devid, struct pt_regs *regs)
 718 {
 719         pmac_t *chip = devid;
 720         snd_pmac_pcm_update(chip, &chip->playback);
 721         return IRQ_HANDLED;
 722 }
 723
 724
 725 static irqreturn_t
 726 snd_pmac_rx_intr(int irq, void *devid, struct pt_regs *regs)
 727 {
 728         pmac_t *chip = devid;
 729         snd_pmac_pcm_update(chip, &chip->capture);
 730         return IRQ_HANDLED;
 731 }
 732
 733
 734 static irqreturn_t
 735 snd_pmac_ctrl_intr(int irq, void *devid, struct pt_regs *regs)
 736 {
 737         pmac_t *chip = devid;
 738         int ctrl = in_le32(&chip->awacs->control);
 739
 740         /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
 741         if (ctrl & MASK_PORTCHG) {
 742                 /* do something when headphone is plugged/unplugged? */
 743                 if (chip->update_automute)
 744                         chip->update_automute(chip, 1);
 745         }
 746         if (ctrl & MASK_CNTLERR) {
 747                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 748                 if (err && chip->model <= PMAC_SCREAMER)
 749                         snd_printk(KERN_DEBUG "error %x\n", err);
 750         }
 751         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 752         out_le32(&chip->awacs->control, ctrl);
 753         return IRQ_HANDLED;
 754 }
 755
 756
 757 /*
 758  * a wrapper to feature call for compatibility
 759  */
 760 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
 761 static void snd_pmac_sound_feature(pmac_t *chip, int enable)
 762 {
 763 #ifdef CONFIG_PPC_HAS_FEATURE_CALLS
 764         ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 765 #else
 766         if (chip->is_pbook_G3) {
 767                 pmu_suspend();
 768                 feature_clear(chip->node, FEATURE_Sound_power);
 769                 feature_clear(chip->node, FEATURE_Sound_CLK_enable);
 770                 big_mdelay(1000); /* XXX */
 771                 pmu_resume();
 772         }
 773         if (chip->is_pbook_3400) {
 774                 feature_set(chip->node, FEATURE_IOBUS_enable);
 775                 udelay(10);
 776         }
 777 #endif
 778 }
 779 #else /* CONFIG_PM && CONFIG_PMAC_PBOOK */
 780 #define snd_pmac_sound_feature(chip,enable) /**/
 781 #endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */
 782
 783 /*
 784  * release resources
 785  */
 786
 787 static int snd_pmac_free(pmac_t *chip)
 788 {
 789         int i;
 790
 791         /* stop sounds */
 792         if (chip->initialized) {
 793                 snd_pmac_dbdma_reset(chip);
 794                 /* disable interrupts from awacs interface */
 795                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 796         }
 797
 798         snd_pmac_sound_feature(chip, 0);
 799 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
 800         snd_pmac_unregister_sleep_notifier(chip);
 801 #endif
 802
 803         /* clean up mixer if any */
 804         if (chip->mixer_free)
 805                 chip->mixer_free(chip);
 806
 807         snd_pmac_detach_beep(chip);
 808
 809         /* release resources */
 810         if (chip->irq >= 0)
 811                 free_irq(chip->irq, (void*)chip);
 812         if (chip->tx_irq >= 0)
 813                 free_irq(chip->tx_irq, (void*)chip);
 814         if (chip->rx_irq >= 0)
 815                 free_irq(chip->rx_irq, (void*)chip);
 816         snd_pmac_dbdma_free(&chip->playback.cmd);
 817         snd_pmac_dbdma_free(&chip->capture.cmd);
 818         snd_pmac_dbdma_free(&chip->extra_dma);
 819         if (chip->macio_base)
 820                 iounmap(chip->macio_base);
 821         if (chip->latch_base)
 822                 iounmap(chip->latch_base);
 823         if (chip->awacs)
 824                 iounmap(chip->awacs);
 825         if (chip->playback.dma)
 826                 iounmap(chip->playback.dma);
 827         if (chip->capture.dma)
 828                 iounmap(chip->capture.dma);
 829         if (chip->node) {
 830                 for (i = 0; i < 3; i++) {
 831                         if (chip->of_requested & (1 << i))
 832                                 release_OF_resource(chip->node, i);
 833                 }
 834         }
 835         kfree(chip);
 836         return 0;
 837 }
 838
 839
 840 /*
 841  * free the device
 842  */
 843 static int snd_pmac_dev_free(snd_device_t *device)
 844 {
 845         pmac_t *chip = device->device_data;
 846         return snd_pmac_free(chip);
 847 }
 848
 849
 850 /*
 851  * check the machine support byteswap (little-endian)
 852  */
 853
 854 static void __init detect_byte_swap(pmac_t *chip)
 855 {
 856         struct device_node *mio;
 857
 858         /* if seems that Keylargo can't byte-swap  */
 859         for (mio = chip->node->parent; mio; mio = mio->parent) {
 860                 if (strcmp(mio->name, "mac-io") == 0) {
 861                         if (device_is_compatible(mio, "Keylargo"))
 862                                 chip->can_byte_swap = 0;
 863                         break;
 864                 }
 865         }
 866
 867         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 868         if (machine_is_compatible("PowerBook3,1") ||
 869             machine_is_compatible("PowerBook2,1"))
 870                 chip->can_byte_swap = 0 ;
 871
 872         if (machine_is_compatible("PowerBook2,1"))
 873                 chip->can_duplex = 0;
 874 }
 875
 876
 877 /*
 878  * detect a sound chip
 879  */
 880 static int __init snd_pmac_detect(pmac_t *chip)
 881 {
 882         struct device_node *sound;
 883         unsigned int *prop, l;
 884
 885         if (_machine != _MACH_Pmac)
 886                 return -ENODEV;
 887
 888         chip->subframe = 0;
 889         chip->revision = 0;
 890         chip->freqs_ok = 0xff; /* all ok */
 891         chip->model = PMAC_AWACS;
 892         chip->can_byte_swap = 1;
 893         chip->can_duplex = 1;
 894         chip->can_capture = 1;
 895         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 896         chip->freq_table = awacs_freqs;
 897
 898         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 899
 900         /* check machine type */
 901         if (machine_is_compatible("AAPL,3400/2400")
 902             || machine_is_compatible("AAPL,3500"))
 903                 chip->is_pbook_3400 = 1;
 904         else if (machine_is_compatible("PowerBook1,1")
 905                  || machine_is_compatible("AAPL,PowerBook1998"))
 906                 chip->is_pbook_G3 = 1;
 907         chip->node = find_devices("awacs");
 908         if (chip->node)
 909                 return 0; /* ok */
 910
 911         /*
 912          * powermac G3 models have a node called "davbus"
 913          * with a child called "sound".
 914          */
 915         chip->node = find_devices("davbus");
 916         /*
 917          * if we didn't find a davbus device, try 'i2s-a' since
 918          * this seems to be what iBooks have
 919          */
 920         if (! chip->node)
 921                 chip->node = find_devices("i2s-a");
 922         if (! chip->node)
 923                 return -ENODEV;
 924         sound = find_devices("sound");
 925         while (sound && sound->parent != chip->node)
 926                 sound = sound->next;
 927         if (! sound)
 928                 return -ENODEV;
 929         prop = (unsigned int *) get_property(sound, "sub-frame", NULL);
 930         if (prop && *prop < 16)
 931                 chip->subframe = *prop;
 932         /* This should be verified on older screamers */
 933         if (device_is_compatible(sound, "screamer")) {
 934                 chip->model = PMAC_SCREAMER;
 935                 // chip->can_byte_swap = 0; /* FIXME: check this */
 936         }
 937         if (device_is_compatible(sound, "burgundy")) {
 938                 chip->model = PMAC_BURGUNDY;
 939                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 940         }
 941         if (device_is_compatible(sound, "daca")) {
 942                 chip->model = PMAC_DACA;
 943                 chip->can_capture = 0;  /* no capture */
 944                 chip->can_duplex = 0;
 945                 // chip->can_byte_swap = 0; /* FIXME: check this */
 946                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 947         }
 948         if (device_is_compatible(sound, "tumbler")) {
 949                 chip->model = PMAC_TUMBLER;
 950                 chip->can_capture = 0;  /* no capture */
 951                 chip->can_duplex = 0;
 952                 // chip->can_byte_swap = 0; /* FIXME: check this */
 953                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 954                 chip->freq_table = tumbler_freqs;
 955                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 956         }
 957         if (device_is_compatible(sound, "snapper")) {
 958                 chip->model = PMAC_SNAPPER;
 959                 // chip->can_byte_swap = 0; /* FIXME: check this */
 960                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 961                 chip->freq_table = tumbler_freqs;
 962                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 963         }
 964         if (device_is_compatible(sound, "AOAKeylargo")) {
 965                 /* Seems to support the stock AWACS frequencies, but has
 966                    a snapper mixer */
 967                 chip->model = PMAC_SNAPPER;
 968                 // chip->can_byte_swap = 0; /* FIXME: check this */
 969                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 970         }
 971         prop = (unsigned int *)get_property(sound, "device-id", NULL);
 972         if (prop)
 973                 chip->device_id = *prop;
 974         chip->has_iic = (find_devices("perch") != NULL);
 975
 976         detect_byte_swap(chip);
 977
 978         /* look for a property saying what sample rates
 979            are available */
 980         prop = (unsigned int *) get_property(sound, "sample-rates", &l);
 981         if (! prop)
 982                 prop = (unsigned int *) get_property(sound, "output-frame-rates", &l);
 983         if (prop) {
 984                 int i;
 985                 chip->freqs_ok = 0;
 986                 for (l /= sizeof(int); l > 0; --l) {
 987                         unsigned int r = *prop++;
 988                         /* Apple 'Fixed' format */
 989                         if (r >= 0x10000)
 990                                 r >>= 16;
 991                         for (i = 0; i < chip->num_freqs; ++i) {
 992                                 if (r == chip->freq_table[i]) {
 993                                         chip->freqs_ok |= (1 << i);
 994                                         break;
 995                                 }
 996                         }
 997                 }
 998         } else {
 999                 /* assume only 44.1khz */
1000                 chip->freqs_ok = 1;
1001         }
1002
1003         return 0;
1004 }
1005
1006 /*
1007  * exported - boolean info callbacks for ease of programming
1008  */
1009 int snd_pmac_boolean_stereo_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1010 {
1011         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1012         uinfo->count = 2;
1013         uinfo->value.integer.min = 0;
1014         uinfo->value.integer.max = 1;
1015         return 0;
1016 }
1017
1018 int snd_pmac_boolean_mono_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1019 {
1020         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1021         uinfo->count = 1;
1022         uinfo->value.integer.min = 0;
1023         uinfo->value.integer.max = 1;
1024         return 0;
1025 }
1026
1027 #ifdef PMAC_SUPPORT_AUTOMUTE
1028 /*
1029  * auto-mute
1030  */
1031 static int pmac_auto_mute_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1032 {
1033         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1034         ucontrol->value.integer.value[0] = chip->auto_mute;
1035         return 0;
1036 }
1037
1038 static int pmac_auto_mute_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1039 {
1040         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1041         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1042                 chip->auto_mute = ucontrol->value.integer.value[0];
1043                 if (chip->update_automute)
1044                         chip->update_automute(chip, 1);
1045                 return 1;
1046         }
1047         return 0;
1048 }
1049
1050 static int pmac_hp_detect_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1051 {
1052         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1053         if (chip->detect_headphone)
1054                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1055         else
1056                 ucontrol->value.integer.value[0] = 0;
1057         return 0;
1058 }
1059
1060 static snd_kcontrol_new_t auto_mute_controls[] __initdata = {
1061         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1062           .name = "Auto Mute Switch",
1063           .info = snd_pmac_boolean_mono_info,
1064           .get = pmac_auto_mute_get,
1065           .put = pmac_auto_mute_put,
1066         },
1067         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1068           .name = "Headphone Detection",
1069           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1070           .info = snd_pmac_boolean_mono_info,
1071           .get = pmac_hp_detect_get,
1072         },
1073 };
1074
1075 int __init snd_pmac_add_automute(pmac_t *chip)
1076 {
1077         int err;
1078         chip->auto_mute = 1;
1079         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1080         if (err < 0)
1081                 return err;
1082         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1083         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1084 }
1085 #endif /* PMAC_SUPPORT_AUTOMUTE */
1086
1087 /*
1088  * create and detect a pmac chip record
1089  */
1090 int __init snd_pmac_new(snd_card_t *card, pmac_t **chip_return)
1091 {
1092         pmac_t *chip;
1093         struct device_node *np;
1094         int i, err;
1095         static snd_device_ops_t ops = {
1096                 .dev_free =     snd_pmac_dev_free,
1097         };
1098
1099         snd_runtime_check(chip_return, return -EINVAL);
1100         *chip_return = NULL;
1101
1102         chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
1103         if (chip == NULL)
1104                 return -ENOMEM;
1105         chip->card = card;
1106
1107         spin_lock_init(&chip->reg_lock);
1108         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1109
1110         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1111         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1112
1113         if ((err = snd_pmac_detect(chip)) < 0)
1114                 goto __error;
1115
1116         if (snd_pmac_dbdma_alloc(&chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1117             snd_pmac_dbdma_alloc(&chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1118             snd_pmac_dbdma_alloc(&chip->extra_dma, 2) < 0) {
1119                 err = -ENOMEM;
1120                 goto __error;
1121         }
1122
1123         np = chip->node;
1124         if (np->n_addrs < 3 || np->n_intrs < 3) {
1125                 err = -ENODEV;
1126                 goto __error;
1127         }
1128
1129         for (i = 0; i < 3; i++) {
1130                 static char *name[3] = { NULL, "- Tx DMA", "- Rx DMA" };
1131                 if (! request_OF_resource(np, i, name[i])) {
1132                         snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
1133                         err = -ENODEV;
1134                         goto __error;
1135                 }
1136                 chip->of_requested |= (1 << i);
1137         }
1138
1139         chip->awacs = ioremap(np->addrs[0].address, 0x1000);
1140         chip->playback.dma = ioremap(np->addrs[1].address, 0x100);
1141         chip->capture.dma = ioremap(np->addrs[2].address, 0x100);
1142         if (chip->model <= PMAC_BURGUNDY) {
1143                 if (request_irq(np->intrs[0].line, snd_pmac_ctrl_intr, 0,
1144                                 "PMac", (void*)chip)) {
1145                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[0].line);
1146                         err = -EBUSY;
1147                         goto __error;
1148                 }
1149                 chip->irq = np->intrs[0].line;
1150         }
1151         if (request_irq(np->intrs[1].line, snd_pmac_tx_intr, 0,
1152                         "PMac Output", (void*)chip)) {
1153                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[1].line);
1154                 err = -EBUSY;
1155                 goto __error;
1156         }
1157         chip->tx_irq = np->intrs[1].line;
1158         if (request_irq(np->intrs[2].line, snd_pmac_rx_intr, 0,
1159                         "PMac Input", (void*)chip)) {
1160                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[2].line);
1161                 err = -EBUSY;
1162                 goto __error;
1163         }
1164         chip->rx_irq = np->intrs[2].line;
1165
1166         snd_pmac_sound_feature(chip, 1);
1167
1168         /* reset */
1169         out_le32(&chip->awacs->control, 0x11);
1170
1171         /* Powerbooks have odd ways of enabling inputs such as
1172            an expansion-bay CD or sound from an internal modem
1173            or a PC-card modem. */
1174         if (chip->is_pbook_3400) {
1175                 /* Enable CD and PC-card sound inputs. */
1176                 /* This is done by reading from address
1177                  * f301a000, + 0x10 to enable the expansion-bay
1178                  * CD sound input, + 0x80 to enable the PC-card
1179                  * sound input.  The 0x100 enables the SCSI bus
1180                  * terminator power.
1181                  */
1182                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1183                 in_8(chip->latch_base + 0x190);
1184         } else if (chip->is_pbook_G3) {
1185                 struct device_node* mio;
1186                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1187                         if (strcmp(mio->name, "mac-io") == 0
1188                             && mio->n_addrs > 0) {
1189                                 chip->macio_base = ioremap(mio->addrs[0].address, 0x40);
1190                                 break;
1191                         }
1192                 }
1193                 /* Enable CD sound input. */
1194                 /* The relevant bits for writing to this byte are 0x8f.
1195                  * I haven't found out what the 0x80 bit does.
1196                  * For the 0xf bits, writing 3 or 7 enables the CD
1197                  * input, any other value disables it.  Values
1198                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1199                  * 4, 6, 8 - f enable the input from the modem.
1200                  */
1201                 if (chip->macio_base)
1202                         out_8(chip->macio_base + 0x37, 3);
1203         }
1204
1205         /* Reset dbdma channels */
1206         snd_pmac_dbdma_reset(chip);
1207
1208 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1209         /* add sleep notifier */
1210         if (! snd_pmac_register_sleep_notifier(chip))
1211                 snd_card_set_pm_callback(chip->card, snd_pmac_suspend, snd_pmac_resume, chip);
1212 #endif
1213
1214         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1215                 goto __error;
1216
1217         *chip_return = chip;
1218         return 0;
1219
1220  __error:
1221         snd_pmac_free(chip);
1222         return err;
1223 }
1224
1225
1226 /*
1227  * sleep notify for powerbook
1228  */
1229
1230 #if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1231
1232 /*
1233  * Save state when going to sleep, restore it afterwards.
1234  */
1235
1236 static int snd_pmac_suspend(snd_card_t *card, unsigned int state)
1237 {
1238         pmac_t *chip = card->pm_private_data;
1239         unsigned long flags;
1240
1241         if (chip->suspend)
1242                 chip->suspend(chip);
1243         snd_pcm_suspend_all(chip->pcm);
1244         spin_lock_irqsave(&chip->reg_lock, flags);
1245         snd_pmac_beep_stop(chip);
1246         spin_unlock_irqrestore(&chip->reg_lock, flags);
1247         if (chip->irq >= 0)
1248                 disable_irq(chip->irq);
1249         if (chip->tx_irq >= 0)
1250                 disable_irq(chip->tx_irq);
1251         if (chip->rx_irq >= 0)
1252                 disable_irq(chip->rx_irq);
1253         snd_pmac_sound_feature(chip, 0);
1254         return 0;
1255 }
1256
1257 static int snd_pmac_resume(snd_card_t *card, unsigned int state)
1258 {
1259         pmac_t *chip = card->pm_private_data;
1260
1261         snd_pmac_sound_feature(chip, 1);
1262         if (chip->resume)
1263                 chip->resume(chip);
1264         /* enable CD sound input */
1265         if (chip->macio_base && chip->is_pbook_G3) {
1266                 out_8(chip->macio_base + 0x37, 3);
1267         } else if (chip->is_pbook_3400) {
1268                 in_8(chip->latch_base + 0x190);
1269         }
1270
1271         snd_pmac_pcm_set_format(chip);
1272
1273         if (chip->irq >= 0)
1274                 enable_irq(chip->irq);
1275         if (chip->tx_irq >= 0)
1276                 enable_irq(chip->tx_irq);
1277         if (chip->rx_irq >= 0)
1278                 enable_irq(chip->rx_irq);
1279
1280         return 0;
1281 }
1282
1283 /* the chip is stored statically by snd_pmac_register_sleep_notifier
1284  * because we can't have any private data for notify callback.
1285  */
1286 static pmac_t *sleeping_pmac = NULL;
1287
1288 static int snd_pmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
1289 {
1290         pmac_t *chip;
1291
1292         chip = sleeping_pmac;
1293         snd_runtime_check(chip, return 0);
1294
1295         switch (when) {
1296         case PBOOK_SLEEP_NOW:
1297                 snd_pmac_suspend(chip->card, 0);
1298                 break;
1299         case PBOOK_WAKE:
1300                 snd_pmac_resume(chip->card, 0);
1301                 break;
1302         }
1303         return PBOOK_SLEEP_OK;
1304 }
1305
1306 static struct pmu_sleep_notifier snd_pmac_sleep_notifier = {
1307         snd_pmac_sleep_notify, SLEEP_LEVEL_SOUND,
1308 };
1309
1310 static int __init snd_pmac_register_sleep_notifier(pmac_t *chip)
1311 {
1312         /* should be protected here.. */
1313         snd_assert(! sleeping_pmac, return -EBUSY);
1314         sleeping_pmac = chip;
1315         pmu_register_sleep_notifier(&snd_pmac_sleep_notifier);
1316         return 0;
1317 }
1318
1319 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip)
1320 {
1321         /* should be protected here.. */
1322         snd_assert(sleeping_pmac == chip, return -ENODEV);
1323         pmu_unregister_sleep_notifier(&snd_pmac_sleep_notifier);
1324         sleeping_pmac = NULL;
1325         return 0;
1326 }
1327
1328 #endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */