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 <linux/pci.h>
  31 #include <linux/dma-mapping.h>
  32 #include <sound/core.h>
  33 #include "pmac.h"
  34 #include <sound/pcm_params.h>
  35 #include <asm/pmac_feature.h>
  36 #include <asm/pci-bridge.h>
  37
  38
  39 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  40 static int awacs_freqs[8] = {
  41         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  42 };
  43 /* fixed frequency table for tumbler */
  44 static int tumbler_freqs[1] = {
  45         44100
  46 };
  47
  48 /*
  49  * allocate DBDMA command arrays
  50  */
  51 static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
  52 {
  53         unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
  54
  55         rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
  56                                         &rec->dma_base, GFP_KERNEL);
  57         if (rec->space == NULL)
  58                 return -ENOMEM;
  59         rec->size = size;
  60         memset(rec->space, 0, rsize);
  61         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
  62         rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
  63
  64         return 0;
  65 }
  66
  67 static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
  68 {
  69         if (rec->space) {
  70                 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
  71
  72                 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
  73         }
  74 }
  75
  76
  77 /*
  78  * pcm stuff
  79  */
  80
  81 /*
  82  * look up frequency table
  83  */
  84
  85 unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
  86 {
  87         int i, ok, found;
  88
  89         ok = rec->cur_freqs;
  90         if (rate > chip->freq_table[0])
  91                 return 0;
  92         found = 0;
  93         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
  94                 if (! (ok & 1)) continue;
  95                 found = i;
  96                 if (rate >= chip->freq_table[i])
  97                         break;
  98         }
  99         return found;
 100 }
 101
 102 /*
 103  * check whether another stream is active
 104  */
 105 static inline int another_stream(int stream)
 106 {
 107         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 108                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 109 }
 110
 111 /*
 112  * allocate buffers
 113  */
 114 static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
 115                                   struct snd_pcm_hw_params *hw_params)
 116 {
 117         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 118 }
 119
 120 /*
 121  * release buffers
 122  */
 123 static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
 124 {
 125         snd_pcm_lib_free_pages(subs);
 126         return 0;
 127 }
 128
 129 /*
 130  * get a stream of the opposite direction
 131  */
 132 static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
 133 {
 134         switch (stream) {
 135         case SNDRV_PCM_STREAM_PLAYBACK:
 136                 return &chip->playback;
 137         case SNDRV_PCM_STREAM_CAPTURE:
 138                 return &chip->capture;
 139         default:
 140                 snd_BUG();
 141                 return NULL;
 142         }
 143 }
 144
 145 /*
 146  * wait while run status is on
 147  */
 148 static inline void
 149 snd_pmac_wait_ack(struct pmac_stream *rec)
 150 {
 151         int timeout = 50000;
 152         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 153                 udelay(1);
 154 }
 155
 156 /*
 157  * set the format and rate to the chip.
 158  * call the lowlevel function if defined (e.g. for AWACS).
 159  */
 160 static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
 161 {
 162         /* set up frequency and format */
 163         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 164         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 165         if (chip->set_format)
 166                 chip->set_format(chip);
 167 }
 168
 169 /*
 170  * stop the DMA transfer
 171  */
 172 static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
 173 {
 174         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 175         snd_pmac_wait_ack(rec);
 176 }
 177
 178 /*
 179  * set the command pointer address
 180  */
 181 static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
 182 {
 183         out_le32(&rec->dma->cmdptr, cmd->addr);
 184 }
 185
 186 /*
 187  * start the DMA
 188  */
 189 static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
 190 {
 191         out_le32(&rec->dma->control, status | (status << 16));
 192 }
 193
 194
 195 /*
 196  * prepare playback/capture stream
 197  */
 198 static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
 199 {
 200         int i;
 201         volatile struct dbdma_cmd __iomem *cp;
 202         struct snd_pcm_runtime *runtime = subs->runtime;
 203         int rate_index;
 204         long offset;
 205         struct pmac_stream *astr;
 206
 207         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 208         rec->period_size = snd_pcm_lib_period_bytes(subs);
 209         rec->nperiods = rec->dma_size / rec->period_size;
 210         rec->cur_period = 0;
 211         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 212
 213         /* set up constraints */
 214         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 215         if (! astr)
 216                 return -EINVAL;
 217         astr->cur_freqs = 1 << rate_index;
 218         astr->cur_formats = 1 << runtime->format;
 219         chip->rate_index = rate_index;
 220         chip->format = runtime->format;
 221
 222         /* We really want to execute a DMA stop command, after the AWACS
 223          * is initialized.
 224          * For reasons I don't understand, it stops the hissing noise
 225          * common to many PowerBook G3 systems and random noise otherwise
 226          * captured on iBook2's about every third time. -ReneR
 227          */
 228         spin_lock_irq(&chip->reg_lock);
 229         snd_pmac_dma_stop(rec);
 230         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 231         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 232         snd_pmac_dma_run(rec, RUN);
 233         spin_unlock_irq(&chip->reg_lock);
 234         mdelay(5);
 235         spin_lock_irq(&chip->reg_lock);
 236         /* continuous DMA memory type doesn't provide the physical address,
 237          * so we need to resolve the address here...
 238          */
 239         offset = runtime->dma_addr;
 240         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 241                 st_le32(&cp->phy_addr, offset);
 242                 st_le16(&cp->req_count, rec->period_size);
 243                 /*st_le16(&cp->res_count, 0);*/
 244                 st_le16(&cp->xfer_status, 0);
 245                 offset += rec->period_size;
 246         }
 247         /* make loop */
 248         st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
 249         st_le32(&cp->cmd_dep, rec->cmd.addr);
 250
 251         snd_pmac_dma_stop(rec);
 252         snd_pmac_dma_set_command(rec, &rec->cmd);
 253         spin_unlock_irq(&chip->reg_lock);
 254
 255         return 0;
 256 }
 257
 258
 259 /*
 260  * PCM trigger/stop
 261  */
 262 static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
 263                                 struct snd_pcm_substream *subs, int cmd)
 264 {
 265         volatile struct dbdma_cmd __iomem *cp;
 266         int i, command;
 267
 268         switch (cmd) {
 269         case SNDRV_PCM_TRIGGER_START:
 270         case SNDRV_PCM_TRIGGER_RESUME:
 271                 if (rec->running)
 272                         return -EBUSY;
 273                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 274                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 275                 spin_lock(&chip->reg_lock);
 276                 snd_pmac_beep_stop(chip);
 277                 snd_pmac_pcm_set_format(chip);
 278                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 279                         out_le16(&cp->command, command);
 280                 snd_pmac_dma_set_command(rec, &rec->cmd);
 281                 (void)in_le32(&rec->dma->status);
 282                 snd_pmac_dma_run(rec, RUN|WAKE);
 283                 rec->running = 1;
 284                 spin_unlock(&chip->reg_lock);
 285                 break;
 286
 287         case SNDRV_PCM_TRIGGER_STOP:
 288         case SNDRV_PCM_TRIGGER_SUSPEND:
 289                 spin_lock(&chip->reg_lock);
 290                 rec->running = 0;
 291                 /*printk("stopped!!\n");*/
 292                 snd_pmac_dma_stop(rec);
 293                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 294                         out_le16(&cp->command, DBDMA_STOP);
 295                 spin_unlock(&chip->reg_lock);
 296                 break;
 297
 298         default:
 299                 return -EINVAL;
 300         }
 301
 302         return 0;
 303 }
 304
 305 /*
 306  * return the current pointer
 307  */
 308 inline
 309 static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
 310                                               struct pmac_stream *rec,
 311                                               struct snd_pcm_substream *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(struct snd_pcm_substream *subs)
 335 {
 336         struct snd_pmac *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(struct snd_pcm_substream *subs,
 341                                      int cmd)
 342 {
 343         struct snd_pmac *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(struct snd_pcm_substream *subs)
 348 {
 349         struct snd_pmac *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(struct snd_pcm_substream *subs)
 359 {
 360         struct snd_pmac *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(struct snd_pcm_substream *subs,
 365                                     int cmd)
 366 {
 367         struct snd_pmac *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(struct snd_pcm_substream *subs)
 372 {
 373         struct snd_pmac *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(struct snd_pmac *chip, struct pmac_stream *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 struct snd_pcm_hardware 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 struct snd_pcm_hardware 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(struct snd_pcm_hw_params *params,
 458                                  struct snd_pcm_hw_rule *rule)
 459 {
 460         struct snd_pmac *chip = rule->private;
 461         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 462         int i, freq_table[8], num_freqs;
 463
 464         if (! rec)
 465                 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(struct snd_pcm_hw_params *params,
 477                                    struct snd_pcm_hw_rule *rule)
 478 {
 479         struct snd_pmac *chip = rule->private;
 480         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 481
 482         if (! rec)
 483                 return -EINVAL;
 484         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 485                                    rec->cur_formats);
 486 }
 487 #endif // NYI
 488
 489 static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
 490                              struct snd_pcm_substream *subs)
 491 {
 492         struct snd_pcm_runtime *runtime = subs->runtime;
 493         int i, j, fflags;
 494         static int typical_freqs[] = {
 495                 44100,
 496                 22050,
 497                 11025,
 498                 0,
 499         };
 500         static int typical_freq_flags[] = {
 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         /* constraints to fix choppy sound */
 558         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 559         return 0;
 560 }
 561
 562 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
 563                               struct snd_pcm_substream *subs)
 564 {
 565         struct pmac_stream *astr;
 566
 567         snd_pmac_dma_stop(rec);
 568
 569         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 570         if (! astr)
 571                 return -EINVAL;
 572
 573         /* reset constraints */
 574         astr->cur_freqs = chip->freqs_ok;
 575         astr->cur_formats = chip->formats_ok;
 576
 577         return 0;
 578 }
 579
 580 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
 581 {
 582         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 583
 584         subs->runtime->hw = snd_pmac_playback;
 585         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 586 }
 587
 588 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
 589 {
 590         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 591
 592         subs->runtime->hw = snd_pmac_capture;
 593         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 594 }
 595
 596 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
 597 {
 598         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 599
 600         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 601 }
 602
 603 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
 604 {
 605         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 606
 607         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 608 }
 609
 610 /*
 611  */
 612
 613 static struct snd_pcm_ops snd_pmac_playback_ops = {
 614         .open =         snd_pmac_playback_open,
 615         .close =        snd_pmac_playback_close,
 616         .ioctl =        snd_pcm_lib_ioctl,
 617         .hw_params =    snd_pmac_pcm_hw_params,
 618         .hw_free =      snd_pmac_pcm_hw_free,
 619         .prepare =      snd_pmac_playback_prepare,
 620         .trigger =      snd_pmac_playback_trigger,
 621         .pointer =      snd_pmac_playback_pointer,
 622 };
 623
 624 static struct snd_pcm_ops snd_pmac_capture_ops = {
 625         .open =         snd_pmac_capture_open,
 626         .close =        snd_pmac_capture_close,
 627         .ioctl =        snd_pcm_lib_ioctl,
 628         .hw_params =    snd_pmac_pcm_hw_params,
 629         .hw_free =      snd_pmac_pcm_hw_free,
 630         .prepare =      snd_pmac_capture_prepare,
 631         .trigger =      snd_pmac_capture_trigger,
 632         .pointer =      snd_pmac_capture_pointer,
 633 };
 634
 635 int __init snd_pmac_pcm_new(struct snd_pmac *chip)
 636 {
 637         struct snd_pcm *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->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 653         strcpy(pcm->name, chip->card->shortname);
 654         chip->pcm = pcm;
 655
 656         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 657         if (chip->can_byte_swap)
 658                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 659
 660         chip->playback.cur_formats = chip->formats_ok;
 661         chip->capture.cur_formats = chip->formats_ok;
 662         chip->playback.cur_freqs = chip->freqs_ok;
 663         chip->capture.cur_freqs = chip->freqs_ok;
 664
 665         /* preallocate 64k buffer */
 666         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 667                                               &chip->pdev->dev,
 668                                               64 * 1024, 64 * 1024);
 669
 670         return 0;
 671 }
 672
 673
 674 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
 675 {
 676         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 677         snd_pmac_wait_ack(&chip->playback);
 678         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 679         snd_pmac_wait_ack(&chip->capture);
 680 }
 681
 682
 683 /*
 684  * handling beep
 685  */
 686 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
 687 {
 688         struct pmac_stream *rec = &chip->playback;
 689
 690         snd_pmac_dma_stop(rec);
 691         st_le16(&chip->extra_dma.cmds->req_count, bytes);
 692         st_le16(&chip->extra_dma.cmds->xfer_status, 0);
 693         st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
 694         st_le32(&chip->extra_dma.cmds->phy_addr, addr);
 695         st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
 696         out_le32(&chip->awacs->control,
 697                  (in_le32(&chip->awacs->control) & ~0x1f00)
 698                  | (speed << 8));
 699         out_le32(&chip->awacs->byteswap, 0);
 700         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 701         snd_pmac_dma_run(rec, RUN);
 702 }
 703
 704 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
 705 {
 706         snd_pmac_dma_stop(&chip->playback);
 707         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 708         snd_pmac_pcm_set_format(chip); /* reset format */
 709 }
 710
 711
 712 /*
 713  * interrupt handlers
 714  */
 715 static irqreturn_t
 716 snd_pmac_tx_intr(int irq, void *devid, struct pt_regs *regs)
 717 {
 718         struct snd_pmac *chip = devid;
 719         snd_pmac_pcm_update(chip, &chip->playback);
 720         return IRQ_HANDLED;
 721 }
 722
 723
 724 static irqreturn_t
 725 snd_pmac_rx_intr(int irq, void *devid, struct pt_regs *regs)
 726 {
 727         struct snd_pmac *chip = devid;
 728         snd_pmac_pcm_update(chip, &chip->capture);
 729         return IRQ_HANDLED;
 730 }
 731
 732
 733 static irqreturn_t
 734 snd_pmac_ctrl_intr(int irq, void *devid, struct pt_regs *regs)
 735 {
 736         struct snd_pmac *chip = devid;
 737         int ctrl = in_le32(&chip->awacs->control);
 738
 739         /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
 740         if (ctrl & MASK_PORTCHG) {
 741                 /* do something when headphone is plugged/unplugged? */
 742                 if (chip->update_automute)
 743                         chip->update_automute(chip, 1);
 744         }
 745         if (ctrl & MASK_CNTLERR) {
 746                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 747                 if (err && chip->model <= PMAC_SCREAMER)
 748                         snd_printk(KERN_DEBUG "error %x\n", err);
 749         }
 750         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 751         out_le32(&chip->awacs->control, ctrl);
 752         return IRQ_HANDLED;
 753 }
 754
 755
 756 /*
 757  * a wrapper to feature call for compatibility
 758  */
 759 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
 760 {
 761         if (ppc_md.feature_call)
 762                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 763 }
 764
 765 /*
 766  * release resources
 767  */
 768
 769 static int snd_pmac_free(struct snd_pmac *chip)
 770 {
 771         /* stop sounds */
 772         if (chip->initialized) {
 773                 snd_pmac_dbdma_reset(chip);
 774                 /* disable interrupts from awacs interface */
 775                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 776         }
 777
 778         snd_pmac_sound_feature(chip, 0);
 779
 780         /* clean up mixer if any */
 781         if (chip->mixer_free)
 782                 chip->mixer_free(chip);
 783
 784         snd_pmac_detach_beep(chip);
 785
 786         /* release resources */
 787         if (chip->irq >= 0)
 788                 free_irq(chip->irq, (void*)chip);
 789         if (chip->tx_irq >= 0)
 790                 free_irq(chip->tx_irq, (void*)chip);
 791         if (chip->rx_irq >= 0)
 792                 free_irq(chip->rx_irq, (void*)chip);
 793         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
 794         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
 795         snd_pmac_dbdma_free(chip, &chip->extra_dma);
 796         if (chip->macio_base)
 797                 iounmap(chip->macio_base);
 798         if (chip->latch_base)
 799                 iounmap(chip->latch_base);
 800         if (chip->awacs)
 801                 iounmap(chip->awacs);
 802         if (chip->playback.dma)
 803                 iounmap(chip->playback.dma);
 804         if (chip->capture.dma)
 805                 iounmap(chip->capture.dma);
 806
 807         if (chip->node) {
 808                 int i;
 809                 for (i = 0; i < 3; i++) {
 810                         if (chip->requested & (1 << i))
 811                                 release_mem_region(chip->rsrc[i].start,
 812                                                    chip->rsrc[i].end -
 813                                                    chip->rsrc[i].start + 1);
 814                 }
 815         }
 816
 817         if (chip->pdev)
 818                 pci_dev_put(chip->pdev);
 819         kfree(chip);
 820         return 0;
 821 }
 822
 823
 824 /*
 825  * free the device
 826  */
 827 static int snd_pmac_dev_free(struct snd_device *device)
 828 {
 829         struct snd_pmac *chip = device->device_data;
 830         return snd_pmac_free(chip);
 831 }
 832
 833
 834 /*
 835  * check the machine support byteswap (little-endian)
 836  */
 837
 838 static void __init detect_byte_swap(struct snd_pmac *chip)
 839 {
 840         struct device_node *mio;
 841
 842         /* if seems that Keylargo can't byte-swap  */
 843         for (mio = chip->node->parent; mio; mio = mio->parent) {
 844                 if (strcmp(mio->name, "mac-io") == 0) {
 845                         if (device_is_compatible(mio, "Keylargo"))
 846                                 chip->can_byte_swap = 0;
 847                         break;
 848                 }
 849         }
 850
 851         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 852         if (machine_is_compatible("PowerBook3,1") ||
 853             machine_is_compatible("PowerBook2,1"))
 854                 chip->can_byte_swap = 0 ;
 855
 856         if (machine_is_compatible("PowerBook2,1"))
 857                 chip->can_duplex = 0;
 858 }
 859
 860
 861 /*
 862  * detect a sound chip
 863  */
 864 static int __init snd_pmac_detect(struct snd_pmac *chip)
 865 {
 866         struct device_node *sound = NULL;
 867         unsigned int *prop, l;
 868         struct macio_chip* macio;
 869
 870         if (!machine_is(powermac))
 871                 return -ENODEV;
 872
 873         chip->subframe = 0;
 874         chip->revision = 0;
 875         chip->freqs_ok = 0xff; /* all ok */
 876         chip->model = PMAC_AWACS;
 877         chip->can_byte_swap = 1;
 878         chip->can_duplex = 1;
 879         chip->can_capture = 1;
 880         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 881         chip->freq_table = awacs_freqs;
 882         chip->pdev = NULL;
 883
 884         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 885
 886         /* check machine type */
 887         if (machine_is_compatible("AAPL,3400/2400")
 888             || machine_is_compatible("AAPL,3500"))
 889                 chip->is_pbook_3400 = 1;
 890         else if (machine_is_compatible("PowerBook1,1")
 891                  || machine_is_compatible("AAPL,PowerBook1998"))
 892                 chip->is_pbook_G3 = 1;
 893         chip->node = find_devices("awacs");
 894         if (chip->node)
 895                 sound = chip->node;
 896
 897         /*
 898          * powermac G3 models have a node called "davbus"
 899          * with a child called "sound".
 900          */
 901         if (!chip->node)
 902                 chip->node = find_devices("davbus");
 903         /*
 904          * if we didn't find a davbus device, try 'i2s-a' since
 905          * this seems to be what iBooks have
 906          */
 907         if (! chip->node) {
 908                 chip->node = find_devices("i2s-a");
 909                 if (chip->node && chip->node->parent &&
 910                     chip->node->parent->parent) {
 911                         if (device_is_compatible(chip->node->parent->parent,
 912                                                  "K2-Keylargo"))
 913                                 chip->is_k2 = 1;
 914                 }
 915         }
 916         if (! chip->node)
 917                 return -ENODEV;
 918
 919         if (!sound) {
 920                 sound = find_devices("sound");
 921                 while (sound && sound->parent != chip->node)
 922                         sound = sound->next;
 923         }
 924         if (! sound)
 925                 return -ENODEV;
 926         prop = (unsigned int *) get_property(sound, "sub-frame", NULL);
 927         if (prop && *prop < 16)
 928                 chip->subframe = *prop;
 929         prop = (unsigned int *) get_property(sound, "layout-id", NULL);
 930         if (prop) {
 931                 /* partly deprecate snd-powermac, for those machines
 932                  * that have a layout-id property for now */
 933                 printk(KERN_INFO "snd-powermac no longer handles any "
 934                                  "machines with a layout-id property "
 935                                  "in the device-tree, use snd-aoa.\n");
 936                 return -ENODEV;
 937         }
 938         /* This should be verified on older screamers */
 939         if (device_is_compatible(sound, "screamer")) {
 940                 chip->model = PMAC_SCREAMER;
 941                 // chip->can_byte_swap = 0; /* FIXME: check this */
 942         }
 943         if (device_is_compatible(sound, "burgundy")) {
 944                 chip->model = PMAC_BURGUNDY;
 945                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 946         }
 947         if (device_is_compatible(sound, "daca")) {
 948                 chip->model = PMAC_DACA;
 949                 chip->can_capture = 0;  /* no capture */
 950                 chip->can_duplex = 0;
 951                 // chip->can_byte_swap = 0; /* FIXME: check this */
 952                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 953         }
 954         if (device_is_compatible(sound, "tumbler")) {
 955                 chip->model = PMAC_TUMBLER;
 956                 chip->can_capture = 0;  /* no capture */
 957                 chip->can_duplex = 0;
 958                 // chip->can_byte_swap = 0; /* FIXME: check this */
 959                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 960                 chip->freq_table = tumbler_freqs;
 961                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 962         }
 963         if (device_is_compatible(sound, "snapper")) {
 964                 chip->model = PMAC_SNAPPER;
 965                 // chip->can_byte_swap = 0; /* FIXME: check this */
 966                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 967                 chip->freq_table = tumbler_freqs;
 968                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 969         }
 970         prop = (unsigned int *)get_property(sound, "device-id", NULL);
 971         if (prop)
 972                 chip->device_id = *prop;
 973         chip->has_iic = (find_devices("perch") != NULL);
 974
 975         /* We need the PCI device for DMA allocations, let's use a crude method
 976          * for now ...
 977          */
 978         macio = macio_find(chip->node, macio_unknown);
 979         if (macio == NULL)
 980                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
 981         else {
 982                 struct pci_dev *pdev = NULL;
 983
 984                 for_each_pci_dev(pdev) {
 985                         struct device_node *np = pci_device_to_OF_node(pdev);
 986                         if (np && np == macio->of_node) {
 987                                 chip->pdev = pdev;
 988                                 break;
 989                         }
 990                 }
 991         }
 992         if (chip->pdev == NULL)
 993                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
 994                        " device !\n");
 995
 996         detect_byte_swap(chip);
 997
 998         /* look for a property saying what sample rates
 999            are available */
1000         prop = (unsigned int *) get_property(sound, "sample-rates", &l);
1001         if (! prop)
1002                 prop = (unsigned int *) get_property(sound,
1003                                                      "output-frame-rates", &l);
1004         if (prop) {
1005                 int i;
1006                 chip->freqs_ok = 0;
1007                 for (l /= sizeof(int); l > 0; --l) {
1008                         unsigned int r = *prop++;
1009                         /* Apple 'Fixed' format */
1010                         if (r >= 0x10000)
1011                                 r >>= 16;
1012                         for (i = 0; i < chip->num_freqs; ++i) {
1013                                 if (r == chip->freq_table[i]) {
1014                                         chip->freqs_ok |= (1 << i);
1015                                         break;
1016                                 }
1017                         }
1018                 }
1019         } else {
1020                 /* assume only 44.1khz */
1021                 chip->freqs_ok = 1;
1022         }
1023
1024         return 0;
1025 }
1026
1027 /*
1028  * exported - boolean info callbacks for ease of programming
1029  */
1030 int snd_pmac_boolean_stereo_info(struct snd_kcontrol *kcontrol,
1031                                  struct snd_ctl_elem_info *uinfo)
1032 {
1033         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1034         uinfo->count = 2;
1035         uinfo->value.integer.min = 0;
1036         uinfo->value.integer.max = 1;
1037         return 0;
1038 }
1039
1040 int snd_pmac_boolean_mono_info(struct snd_kcontrol *kcontrol,
1041                                struct snd_ctl_elem_info *uinfo)
1042 {
1043         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1044         uinfo->count = 1;
1045         uinfo->value.integer.min = 0;
1046         uinfo->value.integer.max = 1;
1047         return 0;
1048 }
1049
1050 #ifdef PMAC_SUPPORT_AUTOMUTE
1051 /*
1052  * auto-mute
1053  */
1054 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1055                               struct snd_ctl_elem_value *ucontrol)
1056 {
1057         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1058         ucontrol->value.integer.value[0] = chip->auto_mute;
1059         return 0;
1060 }
1061
1062 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1063                               struct snd_ctl_elem_value *ucontrol)
1064 {
1065         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1066         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1067                 chip->auto_mute = ucontrol->value.integer.value[0];
1068                 if (chip->update_automute)
1069                         chip->update_automute(chip, 1);
1070                 return 1;
1071         }
1072         return 0;
1073 }
1074
1075 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1076                               struct snd_ctl_elem_value *ucontrol)
1077 {
1078         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1079         if (chip->detect_headphone)
1080                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1081         else
1082                 ucontrol->value.integer.value[0] = 0;
1083         return 0;
1084 }
1085
1086 static struct snd_kcontrol_new auto_mute_controls[] __initdata = {
1087         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1088           .name = "Auto Mute Switch",
1089           .info = snd_pmac_boolean_mono_info,
1090           .get = pmac_auto_mute_get,
1091           .put = pmac_auto_mute_put,
1092         },
1093         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1094           .name = "Headphone Detection",
1095           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1096           .info = snd_pmac_boolean_mono_info,
1097           .get = pmac_hp_detect_get,
1098         },
1099 };
1100
1101 int __init snd_pmac_add_automute(struct snd_pmac *chip)
1102 {
1103         int err;
1104         chip->auto_mute = 1;
1105         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1106         if (err < 0) {
1107                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1108                 return err;
1109         }
1110         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1111         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1112 }
1113 #endif /* PMAC_SUPPORT_AUTOMUTE */
1114
1115 /*
1116  * create and detect a pmac chip record
1117  */
1118 int __init snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1119 {
1120         struct snd_pmac *chip;
1121         struct device_node *np;
1122         int i, err;
1123         unsigned int irq;
1124         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1125         static struct snd_device_ops ops = {
1126                 .dev_free =     snd_pmac_dev_free,
1127         };
1128
1129         *chip_return = NULL;
1130
1131         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1132         if (chip == NULL)
1133                 return -ENOMEM;
1134         chip->card = card;
1135
1136         spin_lock_init(&chip->reg_lock);
1137         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1138
1139         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1140         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1141
1142         if ((err = snd_pmac_detect(chip)) < 0)
1143                 goto __error;
1144
1145         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1146             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1147             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0) {
1148                 err = -ENOMEM;
1149                 goto __error;
1150         }
1151
1152         np = chip->node;
1153         chip->requested = 0;
1154         if (chip->is_k2) {
1155                 static char *rnames[] = {
1156                         "Sound Control", "Sound DMA" };
1157                 for (i = 0; i < 2; i ++) {
1158                         if (of_address_to_resource(np->parent, i,
1159                                                    &chip->rsrc[i])) {
1160                                 printk(KERN_ERR "snd: can't translate rsrc "
1161                                        " %d (%s)\n", i, rnames[i]);
1162                                 err = -ENODEV;
1163                                 goto __error;
1164                         }
1165                         if (request_mem_region(chip->rsrc[i].start,
1166                                                chip->rsrc[i].end -
1167                                                chip->rsrc[i].start + 1,
1168                                                rnames[i]) == NULL) {
1169                                 printk(KERN_ERR "snd: can't request rsrc "
1170                                        " %d (%s: 0x%016llx:%016llx)\n",
1171                                        i, rnames[i],
1172                                        (unsigned long long)chip->rsrc[i].start,
1173                                        (unsigned long long)chip->rsrc[i].end);
1174                                 err = -ENODEV;
1175                                 goto __error;
1176                         }
1177                         chip->requested |= (1 << i);
1178                 }
1179                 ctrl_addr = chip->rsrc[0].start;
1180                 txdma_addr = chip->rsrc[1].start;
1181                 rxdma_addr = txdma_addr + 0x100;
1182         } else {
1183                 static char *rnames[] = {
1184                         "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1185                 for (i = 0; i < 3; i ++) {
1186                         if (of_address_to_resource(np, i,
1187                                                    &chip->rsrc[i])) {
1188                                 printk(KERN_ERR "snd: can't translate rsrc "
1189                                        " %d (%s)\n", i, rnames[i]);
1190                                 err = -ENODEV;
1191                                 goto __error;
1192                         }
1193                         if (request_mem_region(chip->rsrc[i].start,
1194                                                chip->rsrc[i].end -
1195                                                chip->rsrc[i].start + 1,
1196                                                rnames[i]) == NULL) {
1197                                 printk(KERN_ERR "snd: can't request rsrc "
1198                                        " %d (%s: 0x%016llx:%016llx)\n",
1199                                        i, rnames[i],
1200                                        (unsigned long long)chip->rsrc[i].start,
1201                                        (unsigned long long)chip->rsrc[i].end);
1202                                 err = -ENODEV;
1203                                 goto __error;
1204                         }
1205                         chip->requested |= (1 << i);
1206                 }
1207                 ctrl_addr = chip->rsrc[0].start;
1208                 txdma_addr = chip->rsrc[1].start;
1209                 rxdma_addr = chip->rsrc[2].start;
1210         }
1211
1212         chip->awacs = ioremap(ctrl_addr, 0x1000);
1213         chip->playback.dma = ioremap(txdma_addr, 0x100);
1214         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1215         if (chip->model <= PMAC_BURGUNDY) {
1216                 irq = irq_of_parse_and_map(np, 0);
1217                 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1218                                 "PMac", (void*)chip)) {
1219                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1220                                    irq);
1221                         err = -EBUSY;
1222                         goto __error;
1223                 }
1224                 chip->irq = irq;
1225         }
1226         irq = irq_of_parse_and_map(np, 1);
1227         if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1228                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1229                 err = -EBUSY;
1230                 goto __error;
1231         }
1232         chip->tx_irq = irq;
1233         irq = irq_of_parse_and_map(np, 2);
1234         if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1235                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1236                 err = -EBUSY;
1237                 goto __error;
1238         }
1239         chip->rx_irq = irq;
1240
1241         snd_pmac_sound_feature(chip, 1);
1242
1243         /* reset */
1244         if (chip->model == PMAC_AWACS)
1245                 out_le32(&chip->awacs->control, 0x11);
1246
1247         /* Powerbooks have odd ways of enabling inputs such as
1248            an expansion-bay CD or sound from an internal modem
1249            or a PC-card modem. */
1250         if (chip->is_pbook_3400) {
1251                 /* Enable CD and PC-card sound inputs. */
1252                 /* This is done by reading from address
1253                  * f301a000, + 0x10 to enable the expansion-bay
1254                  * CD sound input, + 0x80 to enable the PC-card
1255                  * sound input.  The 0x100 enables the SCSI bus
1256                  * terminator power.
1257                  */
1258                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1259                 in_8(chip->latch_base + 0x190);
1260         } else if (chip->is_pbook_G3) {
1261                 struct device_node* mio;
1262                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1263                         if (strcmp(mio->name, "mac-io") == 0) {
1264                                 struct resource r;
1265                                 if (of_address_to_resource(mio, 0, &r) == 0)
1266                                         chip->macio_base =
1267                                                 ioremap(r.start, 0x40);
1268                                 break;
1269                         }
1270                 }
1271                 /* Enable CD sound input. */
1272                 /* The relevant bits for writing to this byte are 0x8f.
1273                  * I haven't found out what the 0x80 bit does.
1274                  * For the 0xf bits, writing 3 or 7 enables the CD
1275                  * input, any other value disables it.  Values
1276                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1277                  * 4, 6, 8 - f enable the input from the modem.
1278                  */
1279                 if (chip->macio_base)
1280                         out_8(chip->macio_base + 0x37, 3);
1281         }
1282
1283         /* Reset dbdma channels */
1284         snd_pmac_dbdma_reset(chip);
1285
1286         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1287                 goto __error;
1288
1289         *chip_return = chip;
1290         return 0;
1291
1292  __error:
1293         if (chip->pdev)
1294                 pci_dev_put(chip->pdev);
1295         snd_pmac_free(chip);
1296         return err;
1297 }
1298
1299
1300 /*
1301  * sleep notify for powerbook
1302  */
1303
1304 #ifdef CONFIG_PM
1305
1306 /*
1307  * Save state when going to sleep, restore it afterwards.
1308  */
1309
1310 void snd_pmac_suspend(struct snd_pmac *chip)
1311 {
1312         unsigned long flags;
1313
1314         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1315         if (chip->suspend)
1316                 chip->suspend(chip);
1317         snd_pcm_suspend_all(chip->pcm);
1318         spin_lock_irqsave(&chip->reg_lock, flags);
1319         snd_pmac_beep_stop(chip);
1320         spin_unlock_irqrestore(&chip->reg_lock, flags);
1321         if (chip->irq >= 0)
1322                 disable_irq(chip->irq);
1323         if (chip->tx_irq >= 0)
1324                 disable_irq(chip->tx_irq);
1325         if (chip->rx_irq >= 0)
1326                 disable_irq(chip->rx_irq);
1327         snd_pmac_sound_feature(chip, 0);
1328 }
1329
1330 void snd_pmac_resume(struct snd_pmac *chip)
1331 {
1332         snd_pmac_sound_feature(chip, 1);
1333         if (chip->resume)
1334                 chip->resume(chip);
1335         /* enable CD sound input */
1336         if (chip->macio_base && chip->is_pbook_G3)
1337                 out_8(chip->macio_base + 0x37, 3);
1338         else if (chip->is_pbook_3400)
1339                 in_8(chip->latch_base + 0x190);
1340
1341         snd_pmac_pcm_set_format(chip);
1342
1343         if (chip->irq >= 0)
1344                 enable_irq(chip->irq);
1345         if (chip->tx_irq >= 0)
1346                 enable_irq(chip->tx_irq);
1347         if (chip->rx_irq >= 0)
1348                 enable_irq(chip->rx_irq);
1349
1350         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1351 }
1352
1353 #endif /* CONFIG_PM */
1354