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;
 494
 495         /* look up frequency table and fill bit mask */
 496         runtime->hw.rates = 0;
 497         for (i = 0; i < chip->num_freqs; i++)
 498                 if (chip->freqs_ok & (1 << i))
 499                         runtime->hw.rates |=
 500                                 snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
 501
 502         /* check for minimum and maximum rates */
 503         for (i = 0; i < chip->num_freqs; i++) {
 504                 if (chip->freqs_ok & (1 << i)) {
 505                         runtime->hw.rate_max = chip->freq_table[i];
 506                         break;
 507                 }
 508         }
 509         for (i = chip->num_freqs - 1; i >= 0; i--) {
 510                 if (chip->freqs_ok & (1 << i)) {
 511                         runtime->hw.rate_min = chip->freq_table[i];
 512                         break;
 513                 }
 514         }
 515         runtime->hw.formats = chip->formats_ok;
 516         if (chip->can_capture) {
 517                 if (! chip->can_duplex)
 518                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 519                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 520         }
 521         runtime->private_data = rec;
 522         rec->substream = subs;
 523
 524 #if 0 /* FIXME: still under development.. */
 525         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 526                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 527         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 528                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
 529 #endif
 530
 531         runtime->hw.periods_max = rec->cmd.size - 1;
 532
 533         /* constraints to fix choppy sound */
 534         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 535         return 0;
 536 }
 537
 538 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
 539                               struct snd_pcm_substream *subs)
 540 {
 541         struct pmac_stream *astr;
 542
 543         snd_pmac_dma_stop(rec);
 544
 545         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 546         if (! astr)
 547                 return -EINVAL;
 548
 549         /* reset constraints */
 550         astr->cur_freqs = chip->freqs_ok;
 551         astr->cur_formats = chip->formats_ok;
 552
 553         return 0;
 554 }
 555
 556 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
 557 {
 558         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 559
 560         subs->runtime->hw = snd_pmac_playback;
 561         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 562 }
 563
 564 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
 565 {
 566         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 567
 568         subs->runtime->hw = snd_pmac_capture;
 569         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 570 }
 571
 572 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
 573 {
 574         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 575
 576         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 577 }
 578
 579 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
 580 {
 581         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 582
 583         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 584 }
 585
 586 /*
 587  */
 588
 589 static struct snd_pcm_ops snd_pmac_playback_ops = {
 590         .open =         snd_pmac_playback_open,
 591         .close =        snd_pmac_playback_close,
 592         .ioctl =        snd_pcm_lib_ioctl,
 593         .hw_params =    snd_pmac_pcm_hw_params,
 594         .hw_free =      snd_pmac_pcm_hw_free,
 595         .prepare =      snd_pmac_playback_prepare,
 596         .trigger =      snd_pmac_playback_trigger,
 597         .pointer =      snd_pmac_playback_pointer,
 598 };
 599
 600 static struct snd_pcm_ops snd_pmac_capture_ops = {
 601         .open =         snd_pmac_capture_open,
 602         .close =        snd_pmac_capture_close,
 603         .ioctl =        snd_pcm_lib_ioctl,
 604         .hw_params =    snd_pmac_pcm_hw_params,
 605         .hw_free =      snd_pmac_pcm_hw_free,
 606         .prepare =      snd_pmac_capture_prepare,
 607         .trigger =      snd_pmac_capture_trigger,
 608         .pointer =      snd_pmac_capture_pointer,
 609 };
 610
 611 int __init snd_pmac_pcm_new(struct snd_pmac *chip)
 612 {
 613         struct snd_pcm *pcm;
 614         int err;
 615         int num_captures = 1;
 616
 617         if (! chip->can_capture)
 618                 num_captures = 0;
 619         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 620         if (err < 0)
 621                 return err;
 622
 623         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 624         if (chip->can_capture)
 625                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 626
 627         pcm->private_data = chip;
 628         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 629         strcpy(pcm->name, chip->card->shortname);
 630         chip->pcm = pcm;
 631
 632         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 633         if (chip->can_byte_swap)
 634                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 635
 636         chip->playback.cur_formats = chip->formats_ok;
 637         chip->capture.cur_formats = chip->formats_ok;
 638         chip->playback.cur_freqs = chip->freqs_ok;
 639         chip->capture.cur_freqs = chip->freqs_ok;
 640
 641         /* preallocate 64k buffer */
 642         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 643                                               &chip->pdev->dev,
 644                                               64 * 1024, 64 * 1024);
 645
 646         return 0;
 647 }
 648
 649
 650 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
 651 {
 652         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 653         snd_pmac_wait_ack(&chip->playback);
 654         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 655         snd_pmac_wait_ack(&chip->capture);
 656 }
 657
 658
 659 /*
 660  * handling beep
 661  */
 662 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
 663 {
 664         struct pmac_stream *rec = &chip->playback;
 665
 666         snd_pmac_dma_stop(rec);
 667         st_le16(&chip->extra_dma.cmds->req_count, bytes);
 668         st_le16(&chip->extra_dma.cmds->xfer_status, 0);
 669         st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
 670         st_le32(&chip->extra_dma.cmds->phy_addr, addr);
 671         st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
 672         out_le32(&chip->awacs->control,
 673                  (in_le32(&chip->awacs->control) & ~0x1f00)
 674                  | (speed << 8));
 675         out_le32(&chip->awacs->byteswap, 0);
 676         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 677         snd_pmac_dma_run(rec, RUN);
 678 }
 679
 680 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
 681 {
 682         snd_pmac_dma_stop(&chip->playback);
 683         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 684         snd_pmac_pcm_set_format(chip); /* reset format */
 685 }
 686
 687
 688 /*
 689  * interrupt handlers
 690  */
 691 static irqreturn_t
 692 snd_pmac_tx_intr(int irq, void *devid)
 693 {
 694         struct snd_pmac *chip = devid;
 695         snd_pmac_pcm_update(chip, &chip->playback);
 696         return IRQ_HANDLED;
 697 }
 698
 699
 700 static irqreturn_t
 701 snd_pmac_rx_intr(int irq, void *devid)
 702 {
 703         struct snd_pmac *chip = devid;
 704         snd_pmac_pcm_update(chip, &chip->capture);
 705         return IRQ_HANDLED;
 706 }
 707
 708
 709 static irqreturn_t
 710 snd_pmac_ctrl_intr(int irq, void *devid)
 711 {
 712         struct snd_pmac *chip = devid;
 713         int ctrl = in_le32(&chip->awacs->control);
 714
 715         /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
 716         if (ctrl & MASK_PORTCHG) {
 717                 /* do something when headphone is plugged/unplugged? */
 718                 if (chip->update_automute)
 719                         chip->update_automute(chip, 1);
 720         }
 721         if (ctrl & MASK_CNTLERR) {
 722                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 723                 if (err && chip->model <= PMAC_SCREAMER)
 724                         snd_printk(KERN_DEBUG "error %x\n", err);
 725         }
 726         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 727         out_le32(&chip->awacs->control, ctrl);
 728         return IRQ_HANDLED;
 729 }
 730
 731
 732 /*
 733  * a wrapper to feature call for compatibility
 734  */
 735 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
 736 {
 737         if (ppc_md.feature_call)
 738                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 739 }
 740
 741 /*
 742  * release resources
 743  */
 744
 745 static int snd_pmac_free(struct snd_pmac *chip)
 746 {
 747         /* stop sounds */
 748         if (chip->initialized) {
 749                 snd_pmac_dbdma_reset(chip);
 750                 /* disable interrupts from awacs interface */
 751                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 752         }
 753
 754         if (chip->node)
 755                 snd_pmac_sound_feature(chip, 0);
 756
 757         /* clean up mixer if any */
 758         if (chip->mixer_free)
 759                 chip->mixer_free(chip);
 760
 761         snd_pmac_detach_beep(chip);
 762
 763         /* release resources */
 764         if (chip->irq >= 0)
 765                 free_irq(chip->irq, (void*)chip);
 766         if (chip->tx_irq >= 0)
 767                 free_irq(chip->tx_irq, (void*)chip);
 768         if (chip->rx_irq >= 0)
 769                 free_irq(chip->rx_irq, (void*)chip);
 770         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
 771         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
 772         snd_pmac_dbdma_free(chip, &chip->extra_dma);
 773         if (chip->macio_base)
 774                 iounmap(chip->macio_base);
 775         if (chip->latch_base)
 776                 iounmap(chip->latch_base);
 777         if (chip->awacs)
 778                 iounmap(chip->awacs);
 779         if (chip->playback.dma)
 780                 iounmap(chip->playback.dma);
 781         if (chip->capture.dma)
 782                 iounmap(chip->capture.dma);
 783
 784         if (chip->node) {
 785                 int i;
 786                 for (i = 0; i < 3; i++) {
 787                         if (chip->requested & (1 << i))
 788                                 release_mem_region(chip->rsrc[i].start,
 789                                                    chip->rsrc[i].end -
 790                                                    chip->rsrc[i].start + 1);
 791                 }
 792         }
 793
 794         if (chip->pdev)
 795                 pci_dev_put(chip->pdev);
 796         of_node_put(chip->node);
 797         kfree(chip);
 798         return 0;
 799 }
 800
 801
 802 /*
 803  * free the device
 804  */
 805 static int snd_pmac_dev_free(struct snd_device *device)
 806 {
 807         struct snd_pmac *chip = device->device_data;
 808         return snd_pmac_free(chip);
 809 }
 810
 811
 812 /*
 813  * check the machine support byteswap (little-endian)
 814  */
 815
 816 static void __init detect_byte_swap(struct snd_pmac *chip)
 817 {
 818         struct device_node *mio;
 819
 820         /* if seems that Keylargo can't byte-swap  */
 821         for (mio = chip->node->parent; mio; mio = mio->parent) {
 822                 if (strcmp(mio->name, "mac-io") == 0) {
 823                         if (of_device_is_compatible(mio, "Keylargo"))
 824                                 chip->can_byte_swap = 0;
 825                         break;
 826                 }
 827         }
 828
 829         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 830         if (machine_is_compatible("PowerBook3,1") ||
 831             machine_is_compatible("PowerBook2,1"))
 832                 chip->can_byte_swap = 0 ;
 833
 834         if (machine_is_compatible("PowerBook2,1"))
 835                 chip->can_duplex = 0;
 836 }
 837
 838
 839 /*
 840  * detect a sound chip
 841  */
 842 static int __init snd_pmac_detect(struct snd_pmac *chip)
 843 {
 844         struct device_node *sound;
 845         struct device_node *dn;
 846         const unsigned int *prop;
 847         unsigned int l;
 848         struct macio_chip* macio;
 849
 850         if (!machine_is(powermac))
 851                 return -ENODEV;
 852
 853         chip->subframe = 0;
 854         chip->revision = 0;
 855         chip->freqs_ok = 0xff; /* all ok */
 856         chip->model = PMAC_AWACS;
 857         chip->can_byte_swap = 1;
 858         chip->can_duplex = 1;
 859         chip->can_capture = 1;
 860         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 861         chip->freq_table = awacs_freqs;
 862         chip->pdev = NULL;
 863
 864         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 865
 866         /* check machine type */
 867         if (machine_is_compatible("AAPL,3400/2400")
 868             || machine_is_compatible("AAPL,3500"))
 869                 chip->is_pbook_3400 = 1;
 870         else if (machine_is_compatible("PowerBook1,1")
 871                  || machine_is_compatible("AAPL,PowerBook1998"))
 872                 chip->is_pbook_G3 = 1;
 873         chip->node = of_find_node_by_name(NULL, "awacs");
 874         sound = of_node_get(chip->node);
 875
 876         /*
 877          * powermac G3 models have a node called "davbus"
 878          * with a child called "sound".
 879          */
 880         if (!chip->node)
 881                 chip->node = of_find_node_by_name(NULL, "davbus");
 882         /*
 883          * if we didn't find a davbus device, try 'i2s-a' since
 884          * this seems to be what iBooks have
 885          */
 886         if (! chip->node) {
 887                 chip->node = of_find_node_by_name(NULL, "i2s-a");
 888                 if (chip->node && chip->node->parent &&
 889                     chip->node->parent->parent) {
 890                         if (of_device_is_compatible(chip->node->parent->parent,
 891                                                  "K2-Keylargo"))
 892                                 chip->is_k2 = 1;
 893                 }
 894         }
 895         if (! chip->node)
 896                 return -ENODEV;
 897
 898         if (!sound) {
 899                 sound = of_find_node_by_name(NULL, "sound");
 900                 while (sound && sound->parent != chip->node)
 901                         sound = of_find_node_by_name(sound, "sound");
 902         }
 903         if (! sound) {
 904                 of_node_put(chip->node);
 905                 chip->node = NULL;
 906                 return -ENODEV;
 907         }
 908         prop = of_get_property(sound, "sub-frame", NULL);
 909         if (prop && *prop < 16)
 910                 chip->subframe = *prop;
 911         prop = of_get_property(sound, "layout-id", NULL);
 912         if (prop) {
 913                 /* partly deprecate snd-powermac, for those machines
 914                  * that have a layout-id property for now */
 915                 printk(KERN_INFO "snd-powermac no longer handles any "
 916                                  "machines with a layout-id property "
 917                                  "in the device-tree, use snd-aoa.\n");
 918                 of_node_put(sound);
 919                 of_node_put(chip->node);
 920                 chip->node = NULL;
 921                 return -ENODEV;
 922         }
 923         /* This should be verified on older screamers */
 924         if (of_device_is_compatible(sound, "screamer")) {
 925                 chip->model = PMAC_SCREAMER;
 926                 // chip->can_byte_swap = 0; /* FIXME: check this */
 927         }
 928         if (of_device_is_compatible(sound, "burgundy")) {
 929                 chip->model = PMAC_BURGUNDY;
 930                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 931         }
 932         if (of_device_is_compatible(sound, "daca")) {
 933                 chip->model = PMAC_DACA;
 934                 chip->can_capture = 0;  /* no capture */
 935                 chip->can_duplex = 0;
 936                 // chip->can_byte_swap = 0; /* FIXME: check this */
 937                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 938         }
 939         if (of_device_is_compatible(sound, "tumbler")) {
 940                 chip->model = PMAC_TUMBLER;
 941                 chip->can_capture = 0;  /* no capture */
 942                 chip->can_duplex = 0;
 943                 // chip->can_byte_swap = 0; /* FIXME: check this */
 944                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 945                 chip->freq_table = tumbler_freqs;
 946                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 947         }
 948         if (of_device_is_compatible(sound, "snapper")) {
 949                 chip->model = PMAC_SNAPPER;
 950                 // chip->can_byte_swap = 0; /* FIXME: check this */
 951                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
 952                 chip->freq_table = tumbler_freqs;
 953                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
 954         }
 955         prop = of_get_property(sound, "device-id", NULL);
 956         if (prop)
 957                 chip->device_id = *prop;
 958         dn = of_find_node_by_name(NULL, "perch");
 959         chip->has_iic = (dn != NULL);
 960         of_node_put(dn);
 961
 962         /* We need the PCI device for DMA allocations, let's use a crude method
 963          * for now ...
 964          */
 965         macio = macio_find(chip->node, macio_unknown);
 966         if (macio == NULL)
 967                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
 968         else {
 969                 struct pci_dev *pdev = NULL;
 970
 971                 for_each_pci_dev(pdev) {
 972                         struct device_node *np = pci_device_to_OF_node(pdev);
 973                         if (np && np == macio->of_node) {
 974                                 chip->pdev = pdev;
 975                                 break;
 976                         }
 977                 }
 978         }
 979         if (chip->pdev == NULL)
 980                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
 981                        " device !\n");
 982
 983         detect_byte_swap(chip);
 984
 985         /* look for a property saying what sample rates
 986            are available */
 987         prop = of_get_property(sound, "sample-rates", &l);
 988         if (! prop)
 989                 prop = of_get_property(sound, "output-frame-rates", &l);
 990         if (prop) {
 991                 int i;
 992                 chip->freqs_ok = 0;
 993                 for (l /= sizeof(int); l > 0; --l) {
 994                         unsigned int r = *prop++;
 995                         /* Apple 'Fixed' format */
 996                         if (r >= 0x10000)
 997                                 r >>= 16;
 998                         for (i = 0; i < chip->num_freqs; ++i) {
 999                                 if (r == chip->freq_table[i]) {
1000                                         chip->freqs_ok |= (1 << i);
1001                                         break;
1002                                 }
1003                         }
1004                 }
1005         } else {
1006                 /* assume only 44.1khz */
1007                 chip->freqs_ok = 1;
1008         }
1009
1010         of_node_put(sound);
1011         return 0;
1012 }
1013
1014 #ifdef PMAC_SUPPORT_AUTOMUTE
1015 /*
1016  * auto-mute
1017  */
1018 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1019                               struct snd_ctl_elem_value *ucontrol)
1020 {
1021         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1022         ucontrol->value.integer.value[0] = chip->auto_mute;
1023         return 0;
1024 }
1025
1026 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1027                               struct snd_ctl_elem_value *ucontrol)
1028 {
1029         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1030         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1031                 chip->auto_mute = ucontrol->value.integer.value[0];
1032                 if (chip->update_automute)
1033                         chip->update_automute(chip, 1);
1034                 return 1;
1035         }
1036         return 0;
1037 }
1038
1039 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1040                               struct snd_ctl_elem_value *ucontrol)
1041 {
1042         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1043         if (chip->detect_headphone)
1044                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1045         else
1046                 ucontrol->value.integer.value[0] = 0;
1047         return 0;
1048 }
1049
1050 static struct snd_kcontrol_new auto_mute_controls[] __initdata = {
1051         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1052           .name = "Auto Mute Switch",
1053           .info = snd_pmac_boolean_mono_info,
1054           .get = pmac_auto_mute_get,
1055           .put = pmac_auto_mute_put,
1056         },
1057         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1058           .name = "Headphone Detection",
1059           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1060           .info = snd_pmac_boolean_mono_info,
1061           .get = pmac_hp_detect_get,
1062         },
1063 };
1064
1065 int __init snd_pmac_add_automute(struct snd_pmac *chip)
1066 {
1067         int err;
1068         chip->auto_mute = 1;
1069         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1070         if (err < 0) {
1071                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1072                 return err;
1073         }
1074         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1075         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1076 }
1077 #endif /* PMAC_SUPPORT_AUTOMUTE */
1078
1079 /*
1080  * create and detect a pmac chip record
1081  */
1082 int __init snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1083 {
1084         struct snd_pmac *chip;
1085         struct device_node *np;
1086         int i, err;
1087         unsigned int irq;
1088         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1089         static struct snd_device_ops ops = {
1090                 .dev_free =     snd_pmac_dev_free,
1091         };
1092
1093         *chip_return = NULL;
1094
1095         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1096         if (chip == NULL)
1097                 return -ENOMEM;
1098         chip->card = card;
1099
1100         spin_lock_init(&chip->reg_lock);
1101         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1102
1103         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1104         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1105
1106         if ((err = snd_pmac_detect(chip)) < 0)
1107                 goto __error;
1108
1109         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1110             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1111             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0) {
1112                 err = -ENOMEM;
1113                 goto __error;
1114         }
1115
1116         np = chip->node;
1117         chip->requested = 0;
1118         if (chip->is_k2) {
1119                 static char *rnames[] = {
1120                         "Sound Control", "Sound DMA" };
1121                 for (i = 0; i < 2; i ++) {
1122                         if (of_address_to_resource(np->parent, i,
1123                                                    &chip->rsrc[i])) {
1124                                 printk(KERN_ERR "snd: can't translate rsrc "
1125                                        " %d (%s)\n", i, rnames[i]);
1126                                 err = -ENODEV;
1127                                 goto __error;
1128                         }
1129                         if (request_mem_region(chip->rsrc[i].start,
1130                                                chip->rsrc[i].end -
1131                                                chip->rsrc[i].start + 1,
1132                                                rnames[i]) == NULL) {
1133                                 printk(KERN_ERR "snd: can't request rsrc "
1134                                        " %d (%s: 0x%016llx:%016llx)\n",
1135                                        i, rnames[i],
1136                                        (unsigned long long)chip->rsrc[i].start,
1137                                        (unsigned long long)chip->rsrc[i].end);
1138                                 err = -ENODEV;
1139                                 goto __error;
1140                         }
1141                         chip->requested |= (1 << i);
1142                 }
1143                 ctrl_addr = chip->rsrc[0].start;
1144                 txdma_addr = chip->rsrc[1].start;
1145                 rxdma_addr = txdma_addr + 0x100;
1146         } else {
1147                 static char *rnames[] = {
1148                         "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1149                 for (i = 0; i < 3; i ++) {
1150                         if (of_address_to_resource(np, i,
1151                                                    &chip->rsrc[i])) {
1152                                 printk(KERN_ERR "snd: can't translate rsrc "
1153                                        " %d (%s)\n", i, rnames[i]);
1154                                 err = -ENODEV;
1155                                 goto __error;
1156                         }
1157                         if (request_mem_region(chip->rsrc[i].start,
1158                                                chip->rsrc[i].end -
1159                                                chip->rsrc[i].start + 1,
1160                                                rnames[i]) == NULL) {
1161                                 printk(KERN_ERR "snd: can't request rsrc "
1162                                        " %d (%s: 0x%016llx:%016llx)\n",
1163                                        i, rnames[i],
1164                                        (unsigned long long)chip->rsrc[i].start,
1165                                        (unsigned long long)chip->rsrc[i].end);
1166                                 err = -ENODEV;
1167                                 goto __error;
1168                         }
1169                         chip->requested |= (1 << i);
1170                 }
1171                 ctrl_addr = chip->rsrc[0].start;
1172                 txdma_addr = chip->rsrc[1].start;
1173                 rxdma_addr = chip->rsrc[2].start;
1174         }
1175
1176         chip->awacs = ioremap(ctrl_addr, 0x1000);
1177         chip->playback.dma = ioremap(txdma_addr, 0x100);
1178         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1179         if (chip->model <= PMAC_BURGUNDY) {
1180                 irq = irq_of_parse_and_map(np, 0);
1181                 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1182                                 "PMac", (void*)chip)) {
1183                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1184                                    irq);
1185                         err = -EBUSY;
1186                         goto __error;
1187                 }
1188                 chip->irq = irq;
1189         }
1190         irq = irq_of_parse_and_map(np, 1);
1191         if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1192                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1193                 err = -EBUSY;
1194                 goto __error;
1195         }
1196         chip->tx_irq = irq;
1197         irq = irq_of_parse_and_map(np, 2);
1198         if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1199                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1200                 err = -EBUSY;
1201                 goto __error;
1202         }
1203         chip->rx_irq = irq;
1204
1205         snd_pmac_sound_feature(chip, 1);
1206
1207         /* reset */
1208         if (chip->model == PMAC_AWACS)
1209                 out_le32(&chip->awacs->control, 0x11);
1210
1211         /* Powerbooks have odd ways of enabling inputs such as
1212            an expansion-bay CD or sound from an internal modem
1213            or a PC-card modem. */
1214         if (chip->is_pbook_3400) {
1215                 /* Enable CD and PC-card sound inputs. */
1216                 /* This is done by reading from address
1217                  * f301a000, + 0x10 to enable the expansion-bay
1218                  * CD sound input, + 0x80 to enable the PC-card
1219                  * sound input.  The 0x100 enables the SCSI bus
1220                  * terminator power.
1221                  */
1222                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1223                 in_8(chip->latch_base + 0x190);
1224         } else if (chip->is_pbook_G3) {
1225                 struct device_node* mio;
1226                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1227                         if (strcmp(mio->name, "mac-io") == 0) {
1228                                 struct resource r;
1229                                 if (of_address_to_resource(mio, 0, &r) == 0)
1230                                         chip->macio_base =
1231                                                 ioremap(r.start, 0x40);
1232                                 break;
1233                         }
1234                 }
1235                 /* Enable CD sound input. */
1236                 /* The relevant bits for writing to this byte are 0x8f.
1237                  * I haven't found out what the 0x80 bit does.
1238                  * For the 0xf bits, writing 3 or 7 enables the CD
1239                  * input, any other value disables it.  Values
1240                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1241                  * 4, 6, 8 - f enable the input from the modem.
1242                  */
1243                 if (chip->macio_base)
1244                         out_8(chip->macio_base + 0x37, 3);
1245         }
1246
1247         /* Reset dbdma channels */
1248         snd_pmac_dbdma_reset(chip);
1249
1250         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1251                 goto __error;
1252
1253         *chip_return = chip;
1254         return 0;
1255
1256  __error:
1257         snd_pmac_free(chip);
1258         return err;
1259 }
1260
1261
1262 /*
1263  * sleep notify for powerbook
1264  */
1265
1266 #ifdef CONFIG_PM
1267
1268 /*
1269  * Save state when going to sleep, restore it afterwards.
1270  */
1271
1272 void snd_pmac_suspend(struct snd_pmac *chip)
1273 {
1274         unsigned long flags;
1275
1276         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1277         if (chip->suspend)
1278                 chip->suspend(chip);
1279         snd_pcm_suspend_all(chip->pcm);
1280         spin_lock_irqsave(&chip->reg_lock, flags);
1281         snd_pmac_beep_stop(chip);
1282         spin_unlock_irqrestore(&chip->reg_lock, flags);
1283         if (chip->irq >= 0)
1284                 disable_irq(chip->irq);
1285         if (chip->tx_irq >= 0)
1286                 disable_irq(chip->tx_irq);
1287         if (chip->rx_irq >= 0)
1288                 disable_irq(chip->rx_irq);
1289         snd_pmac_sound_feature(chip, 0);
1290 }
1291
1292 void snd_pmac_resume(struct snd_pmac *chip)
1293 {
1294         snd_pmac_sound_feature(chip, 1);
1295         if (chip->resume)
1296                 chip->resume(chip);
1297         /* enable CD sound input */
1298         if (chip->macio_base && chip->is_pbook_G3)
1299                 out_8(chip->macio_base + 0x37, 3);
1300         else if (chip->is_pbook_3400)
1301                 in_8(chip->latch_base + 0x190);
1302
1303         snd_pmac_pcm_set_format(chip);
1304
1305         if (chip->irq >= 0)
1306                 enable_irq(chip->irq);
1307         if (chip->tx_irq >= 0)
1308                 enable_irq(chip->tx_irq);
1309         if (chip->rx_irq >= 0)
1310                 enable_irq(chip->rx_irq);
1311
1312         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1313 }
1314
1315 #endif /* CONFIG_PM */
1316