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 <asm/io.h>
  24 #include <asm/irq.h>
  25 #include <linux/init.h>
  26 #include <linux/delay.h>
  27 #include <linux/slab.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/pci.h>
  30 #include <linux/dma-mapping.h>
  31 #include <sound/core.h>
  32 #include "pmac.h"
  33 #include <sound/pcm_params.h>
  34 #include <asm/pmac_feature.h>
  35 #include <asm/pci-bridge.h>
  36
  37
  38 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
  39 static int awacs_freqs[8] = {
  40         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
  41 };
  42 /* fixed frequency table for tumbler */
  43 static int tumbler_freqs[1] = {
  44         44100
  45 };
  46
  47
  48 /*
  49  * we will allocate a single 'emergency' dbdma cmd block to use if the
  50  * tx status comes up "DEAD".  This happens on some PowerComputing Pmac
  51  * clones, either owing to a bug in dbdma or some interaction between
  52  * IDE and sound.  However, this measure would deal with DEAD status if
  53  * it appeared elsewhere.
  54  */
  55 static struct pmac_dbdma emergency_dbdma;
  56 static int emergency_in_use;
  57
  58
  59 /*
  60  * allocate DBDMA command arrays
  61  */
  62 static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
  63 {
  64         unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
  65
  66         rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
  67                                         &rec->dma_base, GFP_KERNEL);
  68         if (rec->space == NULL)
  69                 return -ENOMEM;
  70         rec->size = size;
  71         memset(rec->space, 0, rsize);
  72         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
  73         rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
  74
  75         return 0;
  76 }
  77
  78 static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
  79 {
  80         if (rec->space) {
  81                 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
  82
  83                 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
  84         }
  85 }
  86
  87
  88 /*
  89  * pcm stuff
  90  */
  91
  92 /*
  93  * look up frequency table
  94  */
  95
  96 unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
  97 {
  98         int i, ok, found;
  99
 100         ok = rec->cur_freqs;
 101         if (rate > chip->freq_table[0])
 102                 return 0;
 103         found = 0;
 104         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
 105                 if (! (ok & 1)) continue;
 106                 found = i;
 107                 if (rate >= chip->freq_table[i])
 108                         break;
 109         }
 110         return found;
 111 }
 112
 113 /*
 114  * check whether another stream is active
 115  */
 116 static inline int another_stream(int stream)
 117 {
 118         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
 119                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 120 }
 121
 122 /*
 123  * allocate buffers
 124  */
 125 static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
 126                                   struct snd_pcm_hw_params *hw_params)
 127 {
 128         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
 129 }
 130
 131 /*
 132  * release buffers
 133  */
 134 static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
 135 {
 136         snd_pcm_lib_free_pages(subs);
 137         return 0;
 138 }
 139
 140 /*
 141  * get a stream of the opposite direction
 142  */
 143 static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
 144 {
 145         switch (stream) {
 146         case SNDRV_PCM_STREAM_PLAYBACK:
 147                 return &chip->playback;
 148         case SNDRV_PCM_STREAM_CAPTURE:
 149                 return &chip->capture;
 150         default:
 151                 snd_BUG();
 152                 return NULL;
 153         }
 154 }
 155
 156 /*
 157  * wait while run status is on
 158  */
 159 static inline void
 160 snd_pmac_wait_ack(struct pmac_stream *rec)
 161 {
 162         int timeout = 50000;
 163         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
 164                 udelay(1);
 165 }
 166
 167 /*
 168  * set the format and rate to the chip.
 169  * call the lowlevel function if defined (e.g. for AWACS).
 170  */
 171 static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
 172 {
 173         /* set up frequency and format */
 174         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
 175         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
 176         if (chip->set_format)
 177                 chip->set_format(chip);
 178 }
 179
 180 /*
 181  * stop the DMA transfer
 182  */
 183 static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
 184 {
 185         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
 186         snd_pmac_wait_ack(rec);
 187 }
 188
 189 /*
 190  * set the command pointer address
 191  */
 192 static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
 193 {
 194         out_le32(&rec->dma->cmdptr, cmd->addr);
 195 }
 196
 197 /*
 198  * start the DMA
 199  */
 200 static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
 201 {
 202         out_le32(&rec->dma->control, status | (status << 16));
 203 }
 204
 205
 206 /*
 207  * prepare playback/capture stream
 208  */
 209 static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
 210 {
 211         int i;
 212         volatile struct dbdma_cmd __iomem *cp;
 213         struct snd_pcm_runtime *runtime = subs->runtime;
 214         int rate_index;
 215         long offset;
 216         struct pmac_stream *astr;
 217
 218         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
 219         rec->period_size = snd_pcm_lib_period_bytes(subs);
 220         rec->nperiods = rec->dma_size / rec->period_size;
 221         rec->cur_period = 0;
 222         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
 223
 224         /* set up constraints */
 225         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 226         if (! astr)
 227                 return -EINVAL;
 228         astr->cur_freqs = 1 << rate_index;
 229         astr->cur_formats = 1 << runtime->format;
 230         chip->rate_index = rate_index;
 231         chip->format = runtime->format;
 232
 233         /* We really want to execute a DMA stop command, after the AWACS
 234          * is initialized.
 235          * For reasons I don't understand, it stops the hissing noise
 236          * common to many PowerBook G3 systems and random noise otherwise
 237          * captured on iBook2's about every third time. -ReneR
 238          */
 239         spin_lock_irq(&chip->reg_lock);
 240         snd_pmac_dma_stop(rec);
 241         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 242         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 243         snd_pmac_dma_run(rec, RUN);
 244         spin_unlock_irq(&chip->reg_lock);
 245         mdelay(5);
 246         spin_lock_irq(&chip->reg_lock);
 247         /* continuous DMA memory type doesn't provide the physical address,
 248          * so we need to resolve the address here...
 249          */
 250         offset = runtime->dma_addr;
 251         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
 252                 st_le32(&cp->phy_addr, offset);
 253                 st_le16(&cp->req_count, rec->period_size);
 254                 /*st_le16(&cp->res_count, 0);*/
 255                 st_le16(&cp->xfer_status, 0);
 256                 offset += rec->period_size;
 257         }
 258         /* make loop */
 259         st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
 260         st_le32(&cp->cmd_dep, rec->cmd.addr);
 261
 262         snd_pmac_dma_stop(rec);
 263         snd_pmac_dma_set_command(rec, &rec->cmd);
 264         spin_unlock_irq(&chip->reg_lock);
 265
 266         return 0;
 267 }
 268
 269
 270 /*
 271  * PCM trigger/stop
 272  */
 273 static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
 274                                 struct snd_pcm_substream *subs, int cmd)
 275 {
 276         volatile struct dbdma_cmd __iomem *cp;
 277         int i, command;
 278
 279         switch (cmd) {
 280         case SNDRV_PCM_TRIGGER_START:
 281         case SNDRV_PCM_TRIGGER_RESUME:
 282                 if (rec->running)
 283                         return -EBUSY;
 284                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 285                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
 286                 spin_lock(&chip->reg_lock);
 287                 snd_pmac_beep_stop(chip);
 288                 snd_pmac_pcm_set_format(chip);
 289                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 290                         out_le16(&cp->command, command);
 291                 snd_pmac_dma_set_command(rec, &rec->cmd);
 292                 (void)in_le32(&rec->dma->status);
 293                 snd_pmac_dma_run(rec, RUN|WAKE);
 294                 rec->running = 1;
 295                 spin_unlock(&chip->reg_lock);
 296                 break;
 297
 298         case SNDRV_PCM_TRIGGER_STOP:
 299         case SNDRV_PCM_TRIGGER_SUSPEND:
 300                 spin_lock(&chip->reg_lock);
 301                 rec->running = 0;
 302                 /*printk(KERN_DEBUG "stopped!!\n");*/
 303                 snd_pmac_dma_stop(rec);
 304                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
 305                         out_le16(&cp->command, DBDMA_STOP);
 306                 spin_unlock(&chip->reg_lock);
 307                 break;
 308
 309         default:
 310                 return -EINVAL;
 311         }
 312
 313         return 0;
 314 }
 315
 316 /*
 317  * return the current pointer
 318  */
 319 inline
 320 static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
 321                                               struct pmac_stream *rec,
 322                                               struct snd_pcm_substream *subs)
 323 {
 324         int count = 0;
 325
 326 #if 1 /* hmm.. how can we get the current dma pointer?? */
 327         int stat;
 328         volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
 329         stat = ld_le16(&cp->xfer_status);
 330         if (stat & (ACTIVE|DEAD)) {
 331                 count = in_le16(&cp->res_count);
 332                 if (count)
 333                         count = rec->period_size - count;
 334         }
 335 #endif
 336         count += rec->cur_period * rec->period_size;
 337         /*printk(KERN_DEBUG "pointer=%d\n", count);*/
 338         return bytes_to_frames(subs->runtime, count);
 339 }
 340
 341 /*
 342  * playback
 343  */
 344
 345 static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
 346 {
 347         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 348         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
 349 }
 350
 351 static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
 352                                      int cmd)
 353 {
 354         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 355         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
 356 }
 357
 358 static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
 359 {
 360         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 361         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
 362 }
 363
 364
 365 /*
 366  * capture
 367  */
 368
 369 static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
 370 {
 371         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 372         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
 373 }
 374
 375 static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
 376                                     int cmd)
 377 {
 378         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 379         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
 380 }
 381
 382 static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
 383 {
 384         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 385         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
 386 }
 387
 388
 389 /*
 390  * Handle DEAD DMA transfers:
 391  * if the TX status comes up "DEAD" - reported on some Power Computing machines
 392  * we need to re-start the dbdma - but from a different physical start address
 393  * and with a different transfer length.  It would get very messy to do this
 394  * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
 395  * addresses each time.  So, we will keep a single dbdma_cmd block which can be
 396  * fiddled with.
 397  * When DEAD status is first reported the content of the faulted dbdma block is
 398  * copied into the emergency buffer and we note that the buffer is in use.
 399  * we then bump the start physical address by the amount that was successfully
 400  * output before it died.
 401  * On any subsequent DEAD result we just do the bump-ups (we know that we are
 402  * already using the emergency dbdma_cmd).
 403  * CHECK: this just tries to "do it".  It is possible that we should abandon
 404  * xfers when the number of residual bytes gets below a certain value - I can
 405  * see that this might cause a loop-forever if a too small transfer causes
 406  * DEAD status.  However this is a TODO for now - we'll see what gets reported.
 407  * When we get a successful transfer result with the emergency buffer we just
 408  * pretend that it completed using the original dmdma_cmd and carry on.  The
 409  * 'next_cmd' field will already point back to the original loop of blocks.
 410  */
 411 static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
 412                                           volatile struct dbdma_cmd __iomem *cp)
 413 {
 414         unsigned short req, res ;
 415         unsigned int phy ;
 416
 417         /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
 418
 419         /* to clear DEAD status we must first clear RUN
 420            set it to quiescent to be on the safe side */
 421         (void)in_le32(&rec->dma->status);
 422         out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
 423
 424         if (!emergency_in_use) { /* new problem */
 425                 memcpy((void *)emergency_dbdma.cmds, (void *)cp,
 426                        sizeof(struct dbdma_cmd));
 427                 emergency_in_use = 1;
 428                 st_le16(&cp->xfer_status, 0);
 429                 st_le16(&cp->req_count, rec->period_size);
 430                 cp = emergency_dbdma.cmds;
 431         }
 432
 433         /* now bump the values to reflect the amount
 434            we haven't yet shifted */
 435         req = ld_le16(&cp->req_count);
 436         res = ld_le16(&cp->res_count);
 437         phy = ld_le32(&cp->phy_addr);
 438         phy += (req - res);
 439         st_le16(&cp->req_count, res);
 440         st_le16(&cp->res_count, 0);
 441         st_le16(&cp->xfer_status, 0);
 442         st_le32(&cp->phy_addr, phy);
 443
 444         st_le32(&cp->cmd_dep, rec->cmd.addr
 445                 + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
 446
 447         st_le16(&cp->command, OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
 448
 449         /* point at our patched up command block */
 450         out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
 451
 452         /* we must re-start the controller */
 453         (void)in_le32(&rec->dma->status);
 454         /* should complete clearing the DEAD status */
 455         out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
 456 }
 457
 458 /*
 459  * update playback/capture pointer from interrupts
 460  */
 461 static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
 462 {
 463         volatile struct dbdma_cmd __iomem *cp;
 464         int c;
 465         int stat;
 466
 467         spin_lock(&chip->reg_lock);
 468         if (rec->running) {
 469                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
 470
 471                         if (emergency_in_use)   /* already using DEAD xfer? */
 472                                 cp = emergency_dbdma.cmds;
 473                         else
 474                                 cp = &rec->cmd.cmds[rec->cur_period];
 475
 476                         stat = ld_le16(&cp->xfer_status);
 477
 478                         if (stat & DEAD) {
 479                                 snd_pmac_pcm_dead_xfer(rec, cp);
 480                                 break; /* this block is still going */
 481                         }
 482
 483                         if (emergency_in_use)
 484                                 emergency_in_use = 0 ; /* done that */
 485
 486                         if (! (stat & ACTIVE))
 487                                 break;
 488
 489                         /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
 490                         st_le16(&cp->xfer_status, 0);
 491                         st_le16(&cp->req_count, rec->period_size);
 492                         /*st_le16(&cp->res_count, 0);*/
 493                         rec->cur_period++;
 494                         if (rec->cur_period >= rec->nperiods) {
 495                                 rec->cur_period = 0;
 496                         }
 497
 498                         spin_unlock(&chip->reg_lock);
 499                         snd_pcm_period_elapsed(rec->substream);
 500                         spin_lock(&chip->reg_lock);
 501                 }
 502         }
 503         spin_unlock(&chip->reg_lock);
 504 }
 505
 506
 507 /*
 508  * hw info
 509  */
 510
 511 static struct snd_pcm_hardware snd_pmac_playback =
 512 {
 513         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 514                                  SNDRV_PCM_INFO_MMAP |
 515                                  SNDRV_PCM_INFO_MMAP_VALID |
 516                                  SNDRV_PCM_INFO_RESUME),
 517         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 518         .rates =                SNDRV_PCM_RATE_8000_44100,
 519         .rate_min =             7350,
 520         .rate_max =             44100,
 521         .channels_min =         2,
 522         .channels_max =         2,
 523         .buffer_bytes_max =     131072,
 524         .period_bytes_min =     256,
 525         .period_bytes_max =     16384,
 526         .periods_min =          3,
 527         .periods_max =          PMAC_MAX_FRAGS,
 528 };
 529
 530 static struct snd_pcm_hardware snd_pmac_capture =
 531 {
 532         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
 533                                  SNDRV_PCM_INFO_MMAP |
 534                                  SNDRV_PCM_INFO_MMAP_VALID |
 535                                  SNDRV_PCM_INFO_RESUME),
 536         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
 537         .rates =                SNDRV_PCM_RATE_8000_44100,
 538         .rate_min =             7350,
 539         .rate_max =             44100,
 540         .channels_min =         2,
 541         .channels_max =         2,
 542         .buffer_bytes_max =     131072,
 543         .period_bytes_min =     256,
 544         .period_bytes_max =     16384,
 545         .periods_min =          3,
 546         .periods_max =          PMAC_MAX_FRAGS,
 547 };
 548
 549
 550 #if 0 // NYI
 551 static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
 552                                  struct snd_pcm_hw_rule *rule)
 553 {
 554         struct snd_pmac *chip = rule->private;
 555         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 556         int i, freq_table[8], num_freqs;
 557
 558         if (! rec)
 559                 return -EINVAL;
 560         num_freqs = 0;
 561         for (i = chip->num_freqs - 1; i >= 0; i--) {
 562                 if (rec->cur_freqs & (1 << i))
 563                         freq_table[num_freqs++] = chip->freq_table[i];
 564         }
 565
 566         return snd_interval_list(hw_param_interval(params, rule->var),
 567                                  num_freqs, freq_table, 0);
 568 }
 569
 570 static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
 571                                    struct snd_pcm_hw_rule *rule)
 572 {
 573         struct snd_pmac *chip = rule->private;
 574         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
 575
 576         if (! rec)
 577                 return -EINVAL;
 578         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
 579                                    rec->cur_formats);
 580 }
 581 #endif // NYI
 582
 583 static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
 584                              struct snd_pcm_substream *subs)
 585 {
 586         struct snd_pcm_runtime *runtime = subs->runtime;
 587         int i;
 588
 589         /* look up frequency table and fill bit mask */
 590         runtime->hw.rates = 0;
 591         for (i = 0; i < chip->num_freqs; i++)
 592                 if (chip->freqs_ok & (1 << i))
 593                         runtime->hw.rates |=
 594                                 snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
 595
 596         /* check for minimum and maximum rates */
 597         for (i = 0; i < chip->num_freqs; i++) {
 598                 if (chip->freqs_ok & (1 << i)) {
 599                         runtime->hw.rate_max = chip->freq_table[i];
 600                         break;
 601                 }
 602         }
 603         for (i = chip->num_freqs - 1; i >= 0; i--) {
 604                 if (chip->freqs_ok & (1 << i)) {
 605                         runtime->hw.rate_min = chip->freq_table[i];
 606                         break;
 607                 }
 608         }
 609         runtime->hw.formats = chip->formats_ok;
 610         if (chip->can_capture) {
 611                 if (! chip->can_duplex)
 612                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
 613                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 614         }
 615         runtime->private_data = rec;
 616         rec->substream = subs;
 617
 618 #if 0 /* FIXME: still under development.. */
 619         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 620                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
 621         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
 622                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
 623 #endif
 624
 625         runtime->hw.periods_max = rec->cmd.size - 1;
 626
 627         /* constraints to fix choppy sound */
 628         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 629         return 0;
 630 }
 631
 632 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
 633                               struct snd_pcm_substream *subs)
 634 {
 635         struct pmac_stream *astr;
 636
 637         snd_pmac_dma_stop(rec);
 638
 639         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
 640         if (! astr)
 641                 return -EINVAL;
 642
 643         /* reset constraints */
 644         astr->cur_freqs = chip->freqs_ok;
 645         astr->cur_formats = chip->formats_ok;
 646
 647         return 0;
 648 }
 649
 650 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
 651 {
 652         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 653
 654         subs->runtime->hw = snd_pmac_playback;
 655         return snd_pmac_pcm_open(chip, &chip->playback, subs);
 656 }
 657
 658 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
 659 {
 660         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 661
 662         subs->runtime->hw = snd_pmac_capture;
 663         return snd_pmac_pcm_open(chip, &chip->capture, subs);
 664 }
 665
 666 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
 667 {
 668         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 669
 670         return snd_pmac_pcm_close(chip, &chip->playback, subs);
 671 }
 672
 673 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
 674 {
 675         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
 676
 677         return snd_pmac_pcm_close(chip, &chip->capture, subs);
 678 }
 679
 680 /*
 681  */
 682
 683 static struct snd_pcm_ops snd_pmac_playback_ops = {
 684         .open =         snd_pmac_playback_open,
 685         .close =        snd_pmac_playback_close,
 686         .ioctl =        snd_pcm_lib_ioctl,
 687         .hw_params =    snd_pmac_pcm_hw_params,
 688         .hw_free =      snd_pmac_pcm_hw_free,
 689         .prepare =      snd_pmac_playback_prepare,
 690         .trigger =      snd_pmac_playback_trigger,
 691         .pointer =      snd_pmac_playback_pointer,
 692 };
 693
 694 static struct snd_pcm_ops snd_pmac_capture_ops = {
 695         .open =         snd_pmac_capture_open,
 696         .close =        snd_pmac_capture_close,
 697         .ioctl =        snd_pcm_lib_ioctl,
 698         .hw_params =    snd_pmac_pcm_hw_params,
 699         .hw_free =      snd_pmac_pcm_hw_free,
 700         .prepare =      snd_pmac_capture_prepare,
 701         .trigger =      snd_pmac_capture_trigger,
 702         .pointer =      snd_pmac_capture_pointer,
 703 };
 704
 705 int __devinit snd_pmac_pcm_new(struct snd_pmac *chip)
 706 {
 707         struct snd_pcm *pcm;
 708         int err;
 709         int num_captures = 1;
 710
 711         if (! chip->can_capture)
 712                 num_captures = 0;
 713         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
 714         if (err < 0)
 715                 return err;
 716
 717         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
 718         if (chip->can_capture)
 719                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
 720
 721         pcm->private_data = chip;
 722         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
 723         strcpy(pcm->name, chip->card->shortname);
 724         chip->pcm = pcm;
 725
 726         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
 727         if (chip->can_byte_swap)
 728                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
 729
 730         chip->playback.cur_formats = chip->formats_ok;
 731         chip->capture.cur_formats = chip->formats_ok;
 732         chip->playback.cur_freqs = chip->freqs_ok;
 733         chip->capture.cur_freqs = chip->freqs_ok;
 734
 735         /* preallocate 64k buffer */
 736         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 737                                               &chip->pdev->dev,
 738                                               64 * 1024, 64 * 1024);
 739
 740         return 0;
 741 }
 742
 743
 744 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
 745 {
 746         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 747         snd_pmac_wait_ack(&chip->playback);
 748         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
 749         snd_pmac_wait_ack(&chip->capture);
 750 }
 751
 752
 753 /*
 754  * handling beep
 755  */
 756 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
 757 {
 758         struct pmac_stream *rec = &chip->playback;
 759
 760         snd_pmac_dma_stop(rec);
 761         st_le16(&chip->extra_dma.cmds->req_count, bytes);
 762         st_le16(&chip->extra_dma.cmds->xfer_status, 0);
 763         st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
 764         st_le32(&chip->extra_dma.cmds->phy_addr, addr);
 765         st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
 766         out_le32(&chip->awacs->control,
 767                  (in_le32(&chip->awacs->control) & ~0x1f00)
 768                  | (speed << 8));
 769         out_le32(&chip->awacs->byteswap, 0);
 770         snd_pmac_dma_set_command(rec, &chip->extra_dma);
 771         snd_pmac_dma_run(rec, RUN);
 772 }
 773
 774 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
 775 {
 776         snd_pmac_dma_stop(&chip->playback);
 777         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
 778         snd_pmac_pcm_set_format(chip); /* reset format */
 779 }
 780
 781
 782 /*
 783  * interrupt handlers
 784  */
 785 static irqreturn_t
 786 snd_pmac_tx_intr(int irq, void *devid)
 787 {
 788         struct snd_pmac *chip = devid;
 789         snd_pmac_pcm_update(chip, &chip->playback);
 790         return IRQ_HANDLED;
 791 }
 792
 793
 794 static irqreturn_t
 795 snd_pmac_rx_intr(int irq, void *devid)
 796 {
 797         struct snd_pmac *chip = devid;
 798         snd_pmac_pcm_update(chip, &chip->capture);
 799         return IRQ_HANDLED;
 800 }
 801
 802
 803 static irqreturn_t
 804 snd_pmac_ctrl_intr(int irq, void *devid)
 805 {
 806         struct snd_pmac *chip = devid;
 807         int ctrl = in_le32(&chip->awacs->control);
 808
 809         /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
 810         if (ctrl & MASK_PORTCHG) {
 811                 /* do something when headphone is plugged/unplugged? */
 812                 if (chip->update_automute)
 813                         chip->update_automute(chip, 1);
 814         }
 815         if (ctrl & MASK_CNTLERR) {
 816                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
 817                 if (err && chip->model <= PMAC_SCREAMER)
 818                         snd_printk(KERN_DEBUG "error %x\n", err);
 819         }
 820         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
 821         out_le32(&chip->awacs->control, ctrl);
 822         return IRQ_HANDLED;
 823 }
 824
 825
 826 /*
 827  * a wrapper to feature call for compatibility
 828  */
 829 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
 830 {
 831         if (ppc_md.feature_call)
 832                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
 833 }
 834
 835 /*
 836  * release resources
 837  */
 838
 839 static int snd_pmac_free(struct snd_pmac *chip)
 840 {
 841         /* stop sounds */
 842         if (chip->initialized) {
 843                 snd_pmac_dbdma_reset(chip);
 844                 /* disable interrupts from awacs interface */
 845                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
 846         }
 847
 848         if (chip->node)
 849                 snd_pmac_sound_feature(chip, 0);
 850
 851         /* clean up mixer if any */
 852         if (chip->mixer_free)
 853                 chip->mixer_free(chip);
 854
 855         snd_pmac_detach_beep(chip);
 856
 857         /* release resources */
 858         if (chip->irq >= 0)
 859                 free_irq(chip->irq, (void*)chip);
 860         if (chip->tx_irq >= 0)
 861                 free_irq(chip->tx_irq, (void*)chip);
 862         if (chip->rx_irq >= 0)
 863                 free_irq(chip->rx_irq, (void*)chip);
 864         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
 865         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
 866         snd_pmac_dbdma_free(chip, &chip->extra_dma);
 867         snd_pmac_dbdma_free(chip, &emergency_dbdma);
 868         if (chip->macio_base)
 869                 iounmap(chip->macio_base);
 870         if (chip->latch_base)
 871                 iounmap(chip->latch_base);
 872         if (chip->awacs)
 873                 iounmap(chip->awacs);
 874         if (chip->playback.dma)
 875                 iounmap(chip->playback.dma);
 876         if (chip->capture.dma)
 877                 iounmap(chip->capture.dma);
 878
 879         if (chip->node) {
 880                 int i;
 881                 for (i = 0; i < 3; i++) {
 882                         if (chip->requested & (1 << i))
 883                                 release_mem_region(chip->rsrc[i].start,
 884                                                    chip->rsrc[i].end -
 885                                                    chip->rsrc[i].start + 1);
 886                 }
 887         }
 888
 889         if (chip->pdev)
 890                 pci_dev_put(chip->pdev);
 891         of_node_put(chip->node);
 892         kfree(chip);
 893         return 0;
 894 }
 895
 896
 897 /*
 898  * free the device
 899  */
 900 static int snd_pmac_dev_free(struct snd_device *device)
 901 {
 902         struct snd_pmac *chip = device->device_data;
 903         return snd_pmac_free(chip);
 904 }
 905
 906
 907 /*
 908  * check the machine support byteswap (little-endian)
 909  */
 910
 911 static void __devinit detect_byte_swap(struct snd_pmac *chip)
 912 {
 913         struct device_node *mio;
 914
 915         /* if seems that Keylargo can't byte-swap  */
 916         for (mio = chip->node->parent; mio; mio = mio->parent) {
 917                 if (strcmp(mio->name, "mac-io") == 0) {
 918                         if (of_device_is_compatible(mio, "Keylargo"))
 919                                 chip->can_byte_swap = 0;
 920                         break;
 921                 }
 922         }
 923
 924         /* it seems the Pismo & iBook can't byte-swap in hardware. */
 925         if (of_machine_is_compatible("PowerBook3,1") ||
 926             of_machine_is_compatible("PowerBook2,1"))
 927                 chip->can_byte_swap = 0 ;
 928
 929         if (of_machine_is_compatible("PowerBook2,1"))
 930                 chip->can_duplex = 0;
 931 }
 932
 933
 934 /*
 935  * detect a sound chip
 936  */
 937 static int __devinit snd_pmac_detect(struct snd_pmac *chip)
 938 {
 939         struct device_node *sound;
 940         struct device_node *dn;
 941         const unsigned int *prop;
 942         unsigned int l;
 943         struct macio_chip* macio;
 944
 945         if (!machine_is(powermac))
 946                 return -ENODEV;
 947
 948         chip->subframe = 0;
 949         chip->revision = 0;
 950         chip->freqs_ok = 0xff; /* all ok */
 951         chip->model = PMAC_AWACS;
 952         chip->can_byte_swap = 1;
 953         chip->can_duplex = 1;
 954         chip->can_capture = 1;
 955         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
 956         chip->freq_table = awacs_freqs;
 957         chip->pdev = NULL;
 958
 959         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
 960
 961         /* check machine type */
 962         if (of_machine_is_compatible("AAPL,3400/2400")
 963             || of_machine_is_compatible("AAPL,3500"))
 964                 chip->is_pbook_3400 = 1;
 965         else if (of_machine_is_compatible("PowerBook1,1")
 966                  || of_machine_is_compatible("AAPL,PowerBook1998"))
 967                 chip->is_pbook_G3 = 1;
 968         chip->node = of_find_node_by_name(NULL, "awacs");
 969         sound = of_node_get(chip->node);
 970
 971         /*
 972          * powermac G3 models have a node called "davbus"
 973          * with a child called "sound".
 974          */
 975         if (!chip->node)
 976                 chip->node = of_find_node_by_name(NULL, "davbus");
 977         /*
 978          * if we didn't find a davbus device, try 'i2s-a' since
 979          * this seems to be what iBooks have
 980          */
 981         if (! chip->node) {
 982                 chip->node = of_find_node_by_name(NULL, "i2s-a");
 983                 if (chip->node && chip->node->parent &&
 984                     chip->node->parent->parent) {
 985                         if (of_device_is_compatible(chip->node->parent->parent,
 986                                                  "K2-Keylargo"))
 987                                 chip->is_k2 = 1;
 988                 }
 989         }
 990         if (! chip->node)
 991                 return -ENODEV;
 992
 993         if (!sound) {
 994                 sound = of_find_node_by_name(NULL, "sound");
 995                 while (sound && sound->parent != chip->node)
 996                         sound = of_find_node_by_name(sound, "sound");
 997         }
 998         if (! sound) {
 999                 of_node_put(chip->node);
1000                 chip->node = NULL;
1001                 return -ENODEV;
1002         }
1003         prop = of_get_property(sound, "sub-frame", NULL);
1004         if (prop && *prop < 16)
1005                 chip->subframe = *prop;
1006         prop = of_get_property(sound, "layout-id", NULL);
1007         if (prop) {
1008                 /* partly deprecate snd-powermac, for those machines
1009                  * that have a layout-id property for now */
1010                 printk(KERN_INFO "snd-powermac no longer handles any "
1011                                  "machines with a layout-id property "
1012                                  "in the device-tree, use snd-aoa.\n");
1013                 of_node_put(sound);
1014                 of_node_put(chip->node);
1015                 chip->node = NULL;
1016                 return -ENODEV;
1017         }
1018         /* This should be verified on older screamers */
1019         if (of_device_is_compatible(sound, "screamer")) {
1020                 chip->model = PMAC_SCREAMER;
1021                 // chip->can_byte_swap = 0; /* FIXME: check this */
1022         }
1023         if (of_device_is_compatible(sound, "burgundy")) {
1024                 chip->model = PMAC_BURGUNDY;
1025                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1026         }
1027         if (of_device_is_compatible(sound, "daca")) {
1028                 chip->model = PMAC_DACA;
1029                 chip->can_capture = 0;  /* no capture */
1030                 chip->can_duplex = 0;
1031                 // chip->can_byte_swap = 0; /* FIXME: check this */
1032                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1033         }
1034         if (of_device_is_compatible(sound, "tumbler")) {
1035                 chip->model = PMAC_TUMBLER;
1036                 chip->can_capture = of_machine_is_compatible("PowerMac4,2")
1037                                 || of_machine_is_compatible("PowerBook4,1");
1038                 chip->can_duplex = 0;
1039                 // chip->can_byte_swap = 0; /* FIXME: check this */
1040                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1041                 chip->freq_table = tumbler_freqs;
1042                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1043         }
1044         if (of_device_is_compatible(sound, "snapper")) {
1045                 chip->model = PMAC_SNAPPER;
1046                 // chip->can_byte_swap = 0; /* FIXME: check this */
1047                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1048                 chip->freq_table = tumbler_freqs;
1049                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1050         }
1051         prop = of_get_property(sound, "device-id", NULL);
1052         if (prop)
1053                 chip->device_id = *prop;
1054         dn = of_find_node_by_name(NULL, "perch");
1055         chip->has_iic = (dn != NULL);
1056         of_node_put(dn);
1057
1058         /* We need the PCI device for DMA allocations, let's use a crude method
1059          * for now ...
1060          */
1061         macio = macio_find(chip->node, macio_unknown);
1062         if (macio == NULL)
1063                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1064         else {
1065                 struct pci_dev *pdev = NULL;
1066
1067                 for_each_pci_dev(pdev) {
1068                         struct device_node *np = pci_device_to_OF_node(pdev);
1069                         if (np && np == macio->of_node) {
1070                                 chip->pdev = pdev;
1071                                 break;
1072                         }
1073                 }
1074         }
1075         if (chip->pdev == NULL)
1076                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1077                        " device !\n");
1078
1079         detect_byte_swap(chip);
1080
1081         /* look for a property saying what sample rates
1082            are available */
1083         prop = of_get_property(sound, "sample-rates", &l);
1084         if (! prop)
1085                 prop = of_get_property(sound, "output-frame-rates", &l);
1086         if (prop) {
1087                 int i;
1088                 chip->freqs_ok = 0;
1089                 for (l /= sizeof(int); l > 0; --l) {
1090                         unsigned int r = *prop++;
1091                         /* Apple 'Fixed' format */
1092                         if (r >= 0x10000)
1093                                 r >>= 16;
1094                         for (i = 0; i < chip->num_freqs; ++i) {
1095                                 if (r == chip->freq_table[i]) {
1096                                         chip->freqs_ok |= (1 << i);
1097                                         break;
1098                                 }
1099                         }
1100                 }
1101         } else {
1102                 /* assume only 44.1khz */
1103                 chip->freqs_ok = 1;
1104         }
1105
1106         of_node_put(sound);
1107         return 0;
1108 }
1109
1110 #ifdef PMAC_SUPPORT_AUTOMUTE
1111 /*
1112  * auto-mute
1113  */
1114 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1115                               struct snd_ctl_elem_value *ucontrol)
1116 {
1117         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1118         ucontrol->value.integer.value[0] = chip->auto_mute;
1119         return 0;
1120 }
1121
1122 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1123                               struct snd_ctl_elem_value *ucontrol)
1124 {
1125         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1126         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1127                 chip->auto_mute = !!ucontrol->value.integer.value[0];
1128                 if (chip->update_automute)
1129                         chip->update_automute(chip, 1);
1130                 return 1;
1131         }
1132         return 0;
1133 }
1134
1135 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1136                               struct snd_ctl_elem_value *ucontrol)
1137 {
1138         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1139         if (chip->detect_headphone)
1140                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1141         else
1142                 ucontrol->value.integer.value[0] = 0;
1143         return 0;
1144 }
1145
1146 static struct snd_kcontrol_new auto_mute_controls[] __devinitdata = {
1147         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1148           .name = "Auto Mute Switch",
1149           .info = snd_pmac_boolean_mono_info,
1150           .get = pmac_auto_mute_get,
1151           .put = pmac_auto_mute_put,
1152         },
1153         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1154           .name = "Headphone Detection",
1155           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1156           .info = snd_pmac_boolean_mono_info,
1157           .get = pmac_hp_detect_get,
1158         },
1159 };
1160
1161 int __devinit snd_pmac_add_automute(struct snd_pmac *chip)
1162 {
1163         int err;
1164         chip->auto_mute = 1;
1165         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1166         if (err < 0) {
1167                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1168                 return err;
1169         }
1170         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1171         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1172 }
1173 #endif /* PMAC_SUPPORT_AUTOMUTE */
1174
1175 /*
1176  * create and detect a pmac chip record
1177  */
1178 int __devinit snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1179 {
1180         struct snd_pmac *chip;
1181         struct device_node *np;
1182         int i, err;
1183         unsigned int irq;
1184         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1185         static struct snd_device_ops ops = {
1186                 .dev_free =     snd_pmac_dev_free,
1187         };
1188
1189         *chip_return = NULL;
1190
1191         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1192         if (chip == NULL)
1193                 return -ENOMEM;
1194         chip->card = card;
1195
1196         spin_lock_init(&chip->reg_lock);
1197         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1198
1199         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1200         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1201
1202         if ((err = snd_pmac_detect(chip)) < 0)
1203                 goto __error;
1204
1205         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1206             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1207             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1208             snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1209                 err = -ENOMEM;
1210                 goto __error;
1211         }
1212
1213         np = chip->node;
1214         chip->requested = 0;
1215         if (chip->is_k2) {
1216                 static char *rnames[] = {
1217                         "Sound Control", "Sound DMA" };
1218                 for (i = 0; i < 2; i ++) {
1219                         if (of_address_to_resource(np->parent, i,
1220                                                    &chip->rsrc[i])) {
1221                                 printk(KERN_ERR "snd: can't translate rsrc "
1222                                        " %d (%s)\n", i, rnames[i]);
1223                                 err = -ENODEV;
1224                                 goto __error;
1225                         }
1226                         if (request_mem_region(chip->rsrc[i].start,
1227                                                chip->rsrc[i].end -
1228                                                chip->rsrc[i].start + 1,
1229                                                rnames[i]) == NULL) {
1230                                 printk(KERN_ERR "snd: can't request rsrc "
1231                                        " %d (%s: 0x%016llx:%016llx)\n",
1232                                        i, rnames[i],
1233                                        (unsigned long long)chip->rsrc[i].start,
1234                                        (unsigned long long)chip->rsrc[i].end);
1235                                 err = -ENODEV;
1236                                 goto __error;
1237                         }
1238                         chip->requested |= (1 << i);
1239                 }
1240                 ctrl_addr = chip->rsrc[0].start;
1241                 txdma_addr = chip->rsrc[1].start;
1242                 rxdma_addr = txdma_addr + 0x100;
1243         } else {
1244                 static char *rnames[] = {
1245                         "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1246                 for (i = 0; i < 3; i ++) {
1247                         if (of_address_to_resource(np, i,
1248                                                    &chip->rsrc[i])) {
1249                                 printk(KERN_ERR "snd: can't translate rsrc "
1250                                        " %d (%s)\n", i, rnames[i]);
1251                                 err = -ENODEV;
1252                                 goto __error;
1253                         }
1254                         if (request_mem_region(chip->rsrc[i].start,
1255                                                chip->rsrc[i].end -
1256                                                chip->rsrc[i].start + 1,
1257                                                rnames[i]) == NULL) {
1258                                 printk(KERN_ERR "snd: can't request rsrc "
1259                                        " %d (%s: 0x%016llx:%016llx)\n",
1260                                        i, rnames[i],
1261                                        (unsigned long long)chip->rsrc[i].start,
1262                                        (unsigned long long)chip->rsrc[i].end);
1263                                 err = -ENODEV;
1264                                 goto __error;
1265                         }
1266                         chip->requested |= (1 << i);
1267                 }
1268                 ctrl_addr = chip->rsrc[0].start;
1269                 txdma_addr = chip->rsrc[1].start;
1270                 rxdma_addr = chip->rsrc[2].start;
1271         }
1272
1273         chip->awacs = ioremap(ctrl_addr, 0x1000);
1274         chip->playback.dma = ioremap(txdma_addr, 0x100);
1275         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1276         if (chip->model <= PMAC_BURGUNDY) {
1277                 irq = irq_of_parse_and_map(np, 0);
1278                 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1279                                 "PMac", (void*)chip)) {
1280                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1281                                    irq);
1282                         err = -EBUSY;
1283                         goto __error;
1284                 }
1285                 chip->irq = irq;
1286         }
1287         irq = irq_of_parse_and_map(np, 1);
1288         if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1289                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1290                 err = -EBUSY;
1291                 goto __error;
1292         }
1293         chip->tx_irq = irq;
1294         irq = irq_of_parse_and_map(np, 2);
1295         if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1296                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1297                 err = -EBUSY;
1298                 goto __error;
1299         }
1300         chip->rx_irq = irq;
1301
1302         snd_pmac_sound_feature(chip, 1);
1303
1304         /* reset & enable interrupts */
1305         if (chip->model <= PMAC_BURGUNDY)
1306                 out_le32(&chip->awacs->control, chip->control_mask);
1307
1308         /* Powerbooks have odd ways of enabling inputs such as
1309            an expansion-bay CD or sound from an internal modem
1310            or a PC-card modem. */
1311         if (chip->is_pbook_3400) {
1312                 /* Enable CD and PC-card sound inputs. */
1313                 /* This is done by reading from address
1314                  * f301a000, + 0x10 to enable the expansion-bay
1315                  * CD sound input, + 0x80 to enable the PC-card
1316                  * sound input.  The 0x100 enables the SCSI bus
1317                  * terminator power.
1318                  */
1319                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1320                 in_8(chip->latch_base + 0x190);
1321         } else if (chip->is_pbook_G3) {
1322                 struct device_node* mio;
1323                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1324                         if (strcmp(mio->name, "mac-io") == 0) {
1325                                 struct resource r;
1326                                 if (of_address_to_resource(mio, 0, &r) == 0)
1327                                         chip->macio_base =
1328                                                 ioremap(r.start, 0x40);
1329                                 break;
1330                         }
1331                 }
1332                 /* Enable CD sound input. */
1333                 /* The relevant bits for writing to this byte are 0x8f.
1334                  * I haven't found out what the 0x80 bit does.
1335                  * For the 0xf bits, writing 3 or 7 enables the CD
1336                  * input, any other value disables it.  Values
1337                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1338                  * 4, 6, 8 - f enable the input from the modem.
1339                  */
1340                 if (chip->macio_base)
1341                         out_8(chip->macio_base + 0x37, 3);
1342         }
1343
1344         /* Reset dbdma channels */
1345         snd_pmac_dbdma_reset(chip);
1346
1347         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1348                 goto __error;
1349
1350         *chip_return = chip;
1351         return 0;
1352
1353  __error:
1354         snd_pmac_free(chip);
1355         return err;
1356 }
1357
1358
1359 /*
1360  * sleep notify for powerbook
1361  */
1362
1363 #ifdef CONFIG_PM
1364
1365 /*
1366  * Save state when going to sleep, restore it afterwards.
1367  */
1368
1369 void snd_pmac_suspend(struct snd_pmac *chip)
1370 {
1371         unsigned long flags;
1372
1373         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1374         if (chip->suspend)
1375                 chip->suspend(chip);
1376         snd_pcm_suspend_all(chip->pcm);
1377         spin_lock_irqsave(&chip->reg_lock, flags);
1378         snd_pmac_beep_stop(chip);
1379         spin_unlock_irqrestore(&chip->reg_lock, flags);
1380         if (chip->irq >= 0)
1381                 disable_irq(chip->irq);
1382         if (chip->tx_irq >= 0)
1383                 disable_irq(chip->tx_irq);
1384         if (chip->rx_irq >= 0)
1385                 disable_irq(chip->rx_irq);
1386         snd_pmac_sound_feature(chip, 0);
1387 }
1388
1389 void snd_pmac_resume(struct snd_pmac *chip)
1390 {
1391         snd_pmac_sound_feature(chip, 1);
1392         if (chip->resume)
1393                 chip->resume(chip);
1394         /* enable CD sound input */
1395         if (chip->macio_base && chip->is_pbook_G3)
1396                 out_8(chip->macio_base + 0x37, 3);
1397         else if (chip->is_pbook_3400)
1398                 in_8(chip->latch_base + 0x190);
1399
1400         snd_pmac_pcm_set_format(chip);
1401
1402         if (chip->irq >= 0)
1403                 enable_irq(chip->irq);
1404         if (chip->tx_irq >= 0)
1405                 enable_irq(chip->tx_irq);
1406         if (chip->rx_irq >= 0)
1407                 enable_irq(chip->rx_irq);
1408
1409         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1410 }
1411
1412 #endif /* CONFIG_PM */
1413