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Linux/sound/ppc/pmac.c

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Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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

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