Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm...
[sfrench/cifs-2.6.git] / 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 <linux/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
38
39 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
40 static int awacs_freqs[8] = {
41         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
42 };
43 /* fixed frequency table for tumbler */
44 static int tumbler_freqs[1] = {
45         44100
46 };
47
48
49 /*
50  * we will allocate a single 'emergency' dbdma cmd block to use if the
51  * tx status comes up "DEAD".  This happens on some PowerComputing Pmac
52  * clones, either owing to a bug in dbdma or some interaction between
53  * IDE and sound.  However, this measure would deal with DEAD status if
54  * it appeared elsewhere.
55  */
56 static struct pmac_dbdma emergency_dbdma;
57 static int emergency_in_use;
58
59
60 /*
61  * allocate DBDMA command arrays
62  */
63 static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
64 {
65         unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
66
67         rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
68                                         &rec->dma_base, GFP_KERNEL);
69         if (rec->space == NULL)
70                 return -ENOMEM;
71         rec->size = size;
72         memset(rec->space, 0, rsize);
73         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
74         rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
75
76         return 0;
77 }
78
79 static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
80 {
81         if (rec->space) {
82                 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
83
84                 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
85         }
86 }
87
88
89 /*
90  * pcm stuff
91  */
92
93 /*
94  * look up frequency table
95  */
96
97 unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
98 {
99         int i, ok, found;
100
101         ok = rec->cur_freqs;
102         if (rate > chip->freq_table[0])
103                 return 0;
104         found = 0;
105         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
106                 if (! (ok & 1)) continue;
107                 found = i;
108                 if (rate >= chip->freq_table[i])
109                         break;
110         }
111         return found;
112 }
113
114 /*
115  * check whether another stream is active
116  */
117 static inline int another_stream(int stream)
118 {
119         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
120                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
121 }
122
123 /*
124  * allocate buffers
125  */
126 static int snd_pmac_pcm_hw_params(struct snd_pcm_substream *subs,
127                                   struct snd_pcm_hw_params *hw_params)
128 {
129         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
130 }
131
132 /*
133  * release buffers
134  */
135 static int snd_pmac_pcm_hw_free(struct snd_pcm_substream *subs)
136 {
137         snd_pcm_lib_free_pages(subs);
138         return 0;
139 }
140
141 /*
142  * get a stream of the opposite direction
143  */
144 static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
145 {
146         switch (stream) {
147         case SNDRV_PCM_STREAM_PLAYBACK:
148                 return &chip->playback;
149         case SNDRV_PCM_STREAM_CAPTURE:
150                 return &chip->capture;
151         default:
152                 snd_BUG();
153                 return NULL;
154         }
155 }
156
157 /*
158  * wait while run status is on
159  */
160 static inline void
161 snd_pmac_wait_ack(struct pmac_stream *rec)
162 {
163         int timeout = 50000;
164         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
165                 udelay(1);
166 }
167
168 /*
169  * set the format and rate to the chip.
170  * call the lowlevel function if defined (e.g. for AWACS).
171  */
172 static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
173 {
174         /* set up frequency and format */
175         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
176         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
177         if (chip->set_format)
178                 chip->set_format(chip);
179 }
180
181 /*
182  * stop the DMA transfer
183  */
184 static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
185 {
186         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
187         snd_pmac_wait_ack(rec);
188 }
189
190 /*
191  * set the command pointer address
192  */
193 static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
194 {
195         out_le32(&rec->dma->cmdptr, cmd->addr);
196 }
197
198 /*
199  * start the DMA
200  */
201 static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
202 {
203         out_le32(&rec->dma->control, status | (status << 16));
204 }
205
206
207 /*
208  * prepare playback/capture stream
209  */
210 static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
211 {
212         int i;
213         volatile struct dbdma_cmd __iomem *cp;
214         struct snd_pcm_runtime *runtime = subs->runtime;
215         int rate_index;
216         long offset;
217         struct pmac_stream *astr;
218
219         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
220         rec->period_size = snd_pcm_lib_period_bytes(subs);
221         rec->nperiods = rec->dma_size / rec->period_size;
222         rec->cur_period = 0;
223         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
224
225         /* set up constraints */
226         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
227         if (! astr)
228                 return -EINVAL;
229         astr->cur_freqs = 1 << rate_index;
230         astr->cur_formats = 1 << runtime->format;
231         chip->rate_index = rate_index;
232         chip->format = runtime->format;
233
234         /* We really want to execute a DMA stop command, after the AWACS
235          * is initialized.
236          * For reasons I don't understand, it stops the hissing noise
237          * common to many PowerBook G3 systems and random noise otherwise
238          * captured on iBook2's about every third time. -ReneR
239          */
240         spin_lock_irq(&chip->reg_lock);
241         snd_pmac_dma_stop(rec);
242         chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
243         snd_pmac_dma_set_command(rec, &chip->extra_dma);
244         snd_pmac_dma_run(rec, RUN);
245         spin_unlock_irq(&chip->reg_lock);
246         mdelay(5);
247         spin_lock_irq(&chip->reg_lock);
248         /* continuous DMA memory type doesn't provide the physical address,
249          * so we need to resolve the address here...
250          */
251         offset = runtime->dma_addr;
252         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
253                 cp->phy_addr = cpu_to_le32(offset);
254                 cp->req_count = cpu_to_le16(rec->period_size);
255                 /*cp->res_count = cpu_to_le16(0);*/
256                 cp->xfer_status = cpu_to_le16(0);
257                 offset += rec->period_size;
258         }
259         /* make loop */
260         cp->command = cpu_to_le16(DBDMA_NOP + BR_ALWAYS);
261         cp->cmd_dep = cpu_to_le32(rec->cmd.addr);
262
263         snd_pmac_dma_stop(rec);
264         snd_pmac_dma_set_command(rec, &rec->cmd);
265         spin_unlock_irq(&chip->reg_lock);
266
267         return 0;
268 }
269
270
271 /*
272  * PCM trigger/stop
273  */
274 static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
275                                 struct snd_pcm_substream *subs, int cmd)
276 {
277         volatile struct dbdma_cmd __iomem *cp;
278         int i, command;
279
280         switch (cmd) {
281         case SNDRV_PCM_TRIGGER_START:
282         case SNDRV_PCM_TRIGGER_RESUME:
283                 if (rec->running)
284                         return -EBUSY;
285                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
286                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
287                 spin_lock(&chip->reg_lock);
288                 snd_pmac_beep_stop(chip);
289                 snd_pmac_pcm_set_format(chip);
290                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
291                         out_le16(&cp->command, command);
292                 snd_pmac_dma_set_command(rec, &rec->cmd);
293                 (void)in_le32(&rec->dma->status);
294                 snd_pmac_dma_run(rec, RUN|WAKE);
295                 rec->running = 1;
296                 spin_unlock(&chip->reg_lock);
297                 break;
298
299         case SNDRV_PCM_TRIGGER_STOP:
300         case SNDRV_PCM_TRIGGER_SUSPEND:
301                 spin_lock(&chip->reg_lock);
302                 rec->running = 0;
303                 /*printk(KERN_DEBUG "stopped!!\n");*/
304                 snd_pmac_dma_stop(rec);
305                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
306                         out_le16(&cp->command, DBDMA_STOP);
307                 spin_unlock(&chip->reg_lock);
308                 break;
309
310         default:
311                 return -EINVAL;
312         }
313
314         return 0;
315 }
316
317 /*
318  * return the current pointer
319  */
320 inline
321 static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
322                                               struct pmac_stream *rec,
323                                               struct snd_pcm_substream *subs)
324 {
325         int count = 0;
326
327 #if 1 /* hmm.. how can we get the current dma pointer?? */
328         int stat;
329         volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
330         stat = le16_to_cpu(cp->xfer_status);
331         if (stat & (ACTIVE|DEAD)) {
332                 count = in_le16(&cp->res_count);
333                 if (count)
334                         count = rec->period_size - count;
335         }
336 #endif
337         count += rec->cur_period * rec->period_size;
338         /*printk(KERN_DEBUG "pointer=%d\n", count);*/
339         return bytes_to_frames(subs->runtime, count);
340 }
341
342 /*
343  * playback
344  */
345
346 static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
347 {
348         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
349         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
350 }
351
352 static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
353                                      int cmd)
354 {
355         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
356         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
357 }
358
359 static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
360 {
361         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
362         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
363 }
364
365
366 /*
367  * capture
368  */
369
370 static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
371 {
372         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
373         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
374 }
375
376 static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
377                                     int cmd)
378 {
379         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
380         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
381 }
382
383 static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
384 {
385         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
386         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
387 }
388
389
390 /*
391  * Handle DEAD DMA transfers:
392  * if the TX status comes up "DEAD" - reported on some Power Computing machines
393  * we need to re-start the dbdma - but from a different physical start address
394  * and with a different transfer length.  It would get very messy to do this
395  * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
396  * addresses each time.  So, we will keep a single dbdma_cmd block which can be
397  * fiddled with.
398  * When DEAD status is first reported the content of the faulted dbdma block is
399  * copied into the emergency buffer and we note that the buffer is in use.
400  * we then bump the start physical address by the amount that was successfully
401  * output before it died.
402  * On any subsequent DEAD result we just do the bump-ups (we know that we are
403  * already using the emergency dbdma_cmd).
404  * CHECK: this just tries to "do it".  It is possible that we should abandon
405  * xfers when the number of residual bytes gets below a certain value - I can
406  * see that this might cause a loop-forever if a too small transfer causes
407  * DEAD status.  However this is a TODO for now - we'll see what gets reported.
408  * When we get a successful transfer result with the emergency buffer we just
409  * pretend that it completed using the original dmdma_cmd and carry on.  The
410  * 'next_cmd' field will already point back to the original loop of blocks.
411  */
412 static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
413                                           volatile struct dbdma_cmd __iomem *cp)
414 {
415         unsigned short req, res ;
416         unsigned int phy ;
417
418         /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
419
420         /* to clear DEAD status we must first clear RUN
421            set it to quiescent to be on the safe side */
422         (void)in_le32(&rec->dma->status);
423         out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
424
425         if (!emergency_in_use) { /* new problem */
426                 memcpy((void *)emergency_dbdma.cmds, (void *)cp,
427                        sizeof(struct dbdma_cmd));
428                 emergency_in_use = 1;
429                 cp->xfer_status = cpu_to_le16(0);
430                 cp->req_count = cpu_to_le16(rec->period_size);
431                 cp = emergency_dbdma.cmds;
432         }
433
434         /* now bump the values to reflect the amount
435            we haven't yet shifted */
436         req = le16_to_cpu(cp->req_count);
437         res = le16_to_cpu(cp->res_count);
438         phy = le32_to_cpu(cp->phy_addr);
439         phy += (req - res);
440         cp->req_count = cpu_to_le16(res);
441         cp->res_count = cpu_to_le16(0);
442         cp->xfer_status = cpu_to_le16(0);
443         cp->phy_addr = cpu_to_le32(phy);
444
445         cp->cmd_dep = cpu_to_le32(rec->cmd.addr
446                 + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
447
448         cp->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
449
450         /* point at our patched up command block */
451         out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
452
453         /* we must re-start the controller */
454         (void)in_le32(&rec->dma->status);
455         /* should complete clearing the DEAD status */
456         out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
457 }
458
459 /*
460  * update playback/capture pointer from interrupts
461  */
462 static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
463 {
464         volatile struct dbdma_cmd __iomem *cp;
465         int c;
466         int stat;
467
468         spin_lock(&chip->reg_lock);
469         if (rec->running) {
470                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
471
472                         if (emergency_in_use)   /* already using DEAD xfer? */
473                                 cp = emergency_dbdma.cmds;
474                         else
475                                 cp = &rec->cmd.cmds[rec->cur_period];
476
477                         stat = le16_to_cpu(cp->xfer_status);
478
479                         if (stat & DEAD) {
480                                 snd_pmac_pcm_dead_xfer(rec, cp);
481                                 break; /* this block is still going */
482                         }
483
484                         if (emergency_in_use)
485                                 emergency_in_use = 0 ; /* done that */
486
487                         if (! (stat & ACTIVE))
488                                 break;
489
490                         /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
491                         cp->xfer_status = cpu_to_le16(0);
492                         cp->req_count = cpu_to_le16(rec->period_size);
493                         /*cp->res_count = cpu_to_le16(0);*/
494                         rec->cur_period++;
495                         if (rec->cur_period >= rec->nperiods) {
496                                 rec->cur_period = 0;
497                         }
498
499                         spin_unlock(&chip->reg_lock);
500                         snd_pcm_period_elapsed(rec->substream);
501                         spin_lock(&chip->reg_lock);
502                 }
503         }
504         spin_unlock(&chip->reg_lock);
505 }
506
507
508 /*
509  * hw info
510  */
511
512 static const struct snd_pcm_hardware snd_pmac_playback =
513 {
514         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
515                                  SNDRV_PCM_INFO_MMAP |
516                                  SNDRV_PCM_INFO_MMAP_VALID |
517                                  SNDRV_PCM_INFO_RESUME),
518         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
519         .rates =                SNDRV_PCM_RATE_8000_44100,
520         .rate_min =             7350,
521         .rate_max =             44100,
522         .channels_min =         2,
523         .channels_max =         2,
524         .buffer_bytes_max =     131072,
525         .period_bytes_min =     256,
526         .period_bytes_max =     16384,
527         .periods_min =          3,
528         .periods_max =          PMAC_MAX_FRAGS,
529 };
530
531 static const struct snd_pcm_hardware snd_pmac_capture =
532 {
533         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
534                                  SNDRV_PCM_INFO_MMAP |
535                                  SNDRV_PCM_INFO_MMAP_VALID |
536                                  SNDRV_PCM_INFO_RESUME),
537         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
538         .rates =                SNDRV_PCM_RATE_8000_44100,
539         .rate_min =             7350,
540         .rate_max =             44100,
541         .channels_min =         2,
542         .channels_max =         2,
543         .buffer_bytes_max =     131072,
544         .period_bytes_min =     256,
545         .period_bytes_max =     16384,
546         .periods_min =          3,
547         .periods_max =          PMAC_MAX_FRAGS,
548 };
549
550
551 #if 0 // NYI
552 static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
553                                  struct snd_pcm_hw_rule *rule)
554 {
555         struct snd_pmac *chip = rule->private;
556         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
557         int i, freq_table[8], num_freqs;
558
559         if (! rec)
560                 return -EINVAL;
561         num_freqs = 0;
562         for (i = chip->num_freqs - 1; i >= 0; i--) {
563                 if (rec->cur_freqs & (1 << i))
564                         freq_table[num_freqs++] = chip->freq_table[i];
565         }
566
567         return snd_interval_list(hw_param_interval(params, rule->var),
568                                  num_freqs, freq_table, 0);
569 }
570
571 static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
572                                    struct snd_pcm_hw_rule *rule)
573 {
574         struct snd_pmac *chip = rule->private;
575         struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
576
577         if (! rec)
578                 return -EINVAL;
579         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
580                                    rec->cur_formats);
581 }
582 #endif // NYI
583
584 static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
585                              struct snd_pcm_substream *subs)
586 {
587         struct snd_pcm_runtime *runtime = subs->runtime;
588         int i;
589
590         /* look up frequency table and fill bit mask */
591         runtime->hw.rates = 0;
592         for (i = 0; i < chip->num_freqs; i++)
593                 if (chip->freqs_ok & (1 << i))
594                         runtime->hw.rates |=
595                                 snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
596
597         /* check for minimum and maximum rates */
598         for (i = 0; i < chip->num_freqs; i++) {
599                 if (chip->freqs_ok & (1 << i)) {
600                         runtime->hw.rate_max = chip->freq_table[i];
601                         break;
602                 }
603         }
604         for (i = chip->num_freqs - 1; i >= 0; i--) {
605                 if (chip->freqs_ok & (1 << i)) {
606                         runtime->hw.rate_min = chip->freq_table[i];
607                         break;
608                 }
609         }
610         runtime->hw.formats = chip->formats_ok;
611         if (chip->can_capture) {
612                 if (! chip->can_duplex)
613                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
614                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
615         }
616         runtime->private_data = rec;
617         rec->substream = subs;
618
619 #if 0 /* FIXME: still under development.. */
620         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
621                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
622         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
623                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
624 #endif
625
626         runtime->hw.periods_max = rec->cmd.size - 1;
627
628         /* constraints to fix choppy sound */
629         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
630         return 0;
631 }
632
633 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
634                               struct snd_pcm_substream *subs)
635 {
636         struct pmac_stream *astr;
637
638         snd_pmac_dma_stop(rec);
639
640         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
641         if (! astr)
642                 return -EINVAL;
643
644         /* reset constraints */
645         astr->cur_freqs = chip->freqs_ok;
646         astr->cur_formats = chip->formats_ok;
647
648         return 0;
649 }
650
651 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
652 {
653         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
654
655         subs->runtime->hw = snd_pmac_playback;
656         return snd_pmac_pcm_open(chip, &chip->playback, subs);
657 }
658
659 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
660 {
661         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
662
663         subs->runtime->hw = snd_pmac_capture;
664         return snd_pmac_pcm_open(chip, &chip->capture, subs);
665 }
666
667 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
668 {
669         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
670
671         return snd_pmac_pcm_close(chip, &chip->playback, subs);
672 }
673
674 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
675 {
676         struct snd_pmac *chip = snd_pcm_substream_chip(subs);
677
678         return snd_pmac_pcm_close(chip, &chip->capture, subs);
679 }
680
681 /*
682  */
683
684 static const struct snd_pcm_ops snd_pmac_playback_ops = {
685         .open =         snd_pmac_playback_open,
686         .close =        snd_pmac_playback_close,
687         .ioctl =        snd_pcm_lib_ioctl,
688         .hw_params =    snd_pmac_pcm_hw_params,
689         .hw_free =      snd_pmac_pcm_hw_free,
690         .prepare =      snd_pmac_playback_prepare,
691         .trigger =      snd_pmac_playback_trigger,
692         .pointer =      snd_pmac_playback_pointer,
693 };
694
695 static const struct snd_pcm_ops snd_pmac_capture_ops = {
696         .open =         snd_pmac_capture_open,
697         .close =        snd_pmac_capture_close,
698         .ioctl =        snd_pcm_lib_ioctl,
699         .hw_params =    snd_pmac_pcm_hw_params,
700         .hw_free =      snd_pmac_pcm_hw_free,
701         .prepare =      snd_pmac_capture_prepare,
702         .trigger =      snd_pmac_capture_trigger,
703         .pointer =      snd_pmac_capture_pointer,
704 };
705
706 int snd_pmac_pcm_new(struct snd_pmac *chip)
707 {
708         struct snd_pcm *pcm;
709         int err;
710         int num_captures = 1;
711
712         if (! chip->can_capture)
713                 num_captures = 0;
714         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
715         if (err < 0)
716                 return err;
717
718         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
719         if (chip->can_capture)
720                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
721
722         pcm->private_data = chip;
723         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
724         strcpy(pcm->name, chip->card->shortname);
725         chip->pcm = pcm;
726
727         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
728         if (chip->can_byte_swap)
729                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
730
731         chip->playback.cur_formats = chip->formats_ok;
732         chip->capture.cur_formats = chip->formats_ok;
733         chip->playback.cur_freqs = chip->freqs_ok;
734         chip->capture.cur_freqs = chip->freqs_ok;
735
736         /* preallocate 64k buffer */
737         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
738                                               &chip->pdev->dev,
739                                               64 * 1024, 64 * 1024);
740
741         return 0;
742 }
743
744
745 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
746 {
747         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
748         snd_pmac_wait_ack(&chip->playback);
749         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
750         snd_pmac_wait_ack(&chip->capture);
751 }
752
753
754 /*
755  * handling beep
756  */
757 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
758 {
759         struct pmac_stream *rec = &chip->playback;
760
761         snd_pmac_dma_stop(rec);
762         chip->extra_dma.cmds->req_count = cpu_to_le16(bytes);
763         chip->extra_dma.cmds->xfer_status = cpu_to_le16(0);
764         chip->extra_dma.cmds->cmd_dep = cpu_to_le32(chip->extra_dma.addr);
765         chip->extra_dma.cmds->phy_addr = cpu_to_le32(addr);
766         chip->extra_dma.cmds->command = cpu_to_le16(OUTPUT_MORE + BR_ALWAYS);
767         out_le32(&chip->awacs->control,
768                  (in_le32(&chip->awacs->control) & ~0x1f00)
769                  | (speed << 8));
770         out_le32(&chip->awacs->byteswap, 0);
771         snd_pmac_dma_set_command(rec, &chip->extra_dma);
772         snd_pmac_dma_run(rec, RUN);
773 }
774
775 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
776 {
777         snd_pmac_dma_stop(&chip->playback);
778         chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
779         snd_pmac_pcm_set_format(chip); /* reset format */
780 }
781
782
783 /*
784  * interrupt handlers
785  */
786 static irqreturn_t
787 snd_pmac_tx_intr(int irq, void *devid)
788 {
789         struct snd_pmac *chip = devid;
790         snd_pmac_pcm_update(chip, &chip->playback);
791         return IRQ_HANDLED;
792 }
793
794
795 static irqreturn_t
796 snd_pmac_rx_intr(int irq, void *devid)
797 {
798         struct snd_pmac *chip = devid;
799         snd_pmac_pcm_update(chip, &chip->capture);
800         return IRQ_HANDLED;
801 }
802
803
804 static irqreturn_t
805 snd_pmac_ctrl_intr(int irq, void *devid)
806 {
807         struct snd_pmac *chip = devid;
808         int ctrl = in_le32(&chip->awacs->control);
809
810         /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
811         if (ctrl & MASK_PORTCHG) {
812                 /* do something when headphone is plugged/unplugged? */
813                 if (chip->update_automute)
814                         chip->update_automute(chip, 1);
815         }
816         if (ctrl & MASK_CNTLERR) {
817                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
818                 if (err && chip->model <= PMAC_SCREAMER)
819                         snd_printk(KERN_DEBUG "error %x\n", err);
820         }
821         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
822         out_le32(&chip->awacs->control, ctrl);
823         return IRQ_HANDLED;
824 }
825
826
827 /*
828  * a wrapper to feature call for compatibility
829  */
830 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
831 {
832         if (ppc_md.feature_call)
833                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
834 }
835
836 /*
837  * release resources
838  */
839
840 static int snd_pmac_free(struct snd_pmac *chip)
841 {
842         /* stop sounds */
843         if (chip->initialized) {
844                 snd_pmac_dbdma_reset(chip);
845                 /* disable interrupts from awacs interface */
846                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
847         }
848
849         if (chip->node)
850                 snd_pmac_sound_feature(chip, 0);
851
852         /* clean up mixer if any */
853         if (chip->mixer_free)
854                 chip->mixer_free(chip);
855
856         snd_pmac_detach_beep(chip);
857
858         /* release resources */
859         if (chip->irq >= 0)
860                 free_irq(chip->irq, (void*)chip);
861         if (chip->tx_irq >= 0)
862                 free_irq(chip->tx_irq, (void*)chip);
863         if (chip->rx_irq >= 0)
864                 free_irq(chip->rx_irq, (void*)chip);
865         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
866         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
867         snd_pmac_dbdma_free(chip, &chip->extra_dma);
868         snd_pmac_dbdma_free(chip, &emergency_dbdma);
869         iounmap(chip->macio_base);
870         iounmap(chip->latch_base);
871         iounmap(chip->awacs);
872         iounmap(chip->playback.dma);
873         iounmap(chip->capture.dma);
874
875         if (chip->node) {
876                 int i;
877                 for (i = 0; i < 3; i++) {
878                         if (chip->requested & (1 << i))
879                                 release_mem_region(chip->rsrc[i].start,
880                                                    resource_size(&chip->rsrc[i]));
881                 }
882         }
883
884         pci_dev_put(chip->pdev);
885         of_node_put(chip->node);
886         kfree(chip);
887         return 0;
888 }
889
890
891 /*
892  * free the device
893  */
894 static int snd_pmac_dev_free(struct snd_device *device)
895 {
896         struct snd_pmac *chip = device->device_data;
897         return snd_pmac_free(chip);
898 }
899
900
901 /*
902  * check the machine support byteswap (little-endian)
903  */
904
905 static void detect_byte_swap(struct snd_pmac *chip)
906 {
907         struct device_node *mio;
908
909         /* if seems that Keylargo can't byte-swap  */
910         for (mio = chip->node->parent; mio; mio = mio->parent) {
911                 if (strcmp(mio->name, "mac-io") == 0) {
912                         if (of_device_is_compatible(mio, "Keylargo"))
913                                 chip->can_byte_swap = 0;
914                         break;
915                 }
916         }
917
918         /* it seems the Pismo & iBook can't byte-swap in hardware. */
919         if (of_machine_is_compatible("PowerBook3,1") ||
920             of_machine_is_compatible("PowerBook2,1"))
921                 chip->can_byte_swap = 0 ;
922
923         if (of_machine_is_compatible("PowerBook2,1"))
924                 chip->can_duplex = 0;
925 }
926
927
928 /*
929  * detect a sound chip
930  */
931 static int snd_pmac_detect(struct snd_pmac *chip)
932 {
933         struct device_node *sound;
934         struct device_node *dn;
935         const unsigned int *prop;
936         unsigned int l;
937         struct macio_chip* macio;
938
939         if (!machine_is(powermac))
940                 return -ENODEV;
941
942         chip->subframe = 0;
943         chip->revision = 0;
944         chip->freqs_ok = 0xff; /* all ok */
945         chip->model = PMAC_AWACS;
946         chip->can_byte_swap = 1;
947         chip->can_duplex = 1;
948         chip->can_capture = 1;
949         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
950         chip->freq_table = awacs_freqs;
951         chip->pdev = NULL;
952
953         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
954
955         /* check machine type */
956         if (of_machine_is_compatible("AAPL,3400/2400")
957             || of_machine_is_compatible("AAPL,3500"))
958                 chip->is_pbook_3400 = 1;
959         else if (of_machine_is_compatible("PowerBook1,1")
960                  || of_machine_is_compatible("AAPL,PowerBook1998"))
961                 chip->is_pbook_G3 = 1;
962         chip->node = of_find_node_by_name(NULL, "awacs");
963         sound = of_node_get(chip->node);
964
965         /*
966          * powermac G3 models have a node called "davbus"
967          * with a child called "sound".
968          */
969         if (!chip->node)
970                 chip->node = of_find_node_by_name(NULL, "davbus");
971         /*
972          * if we didn't find a davbus device, try 'i2s-a' since
973          * this seems to be what iBooks have
974          */
975         if (! chip->node) {
976                 chip->node = of_find_node_by_name(NULL, "i2s-a");
977                 if (chip->node && chip->node->parent &&
978                     chip->node->parent->parent) {
979                         if (of_device_is_compatible(chip->node->parent->parent,
980                                                  "K2-Keylargo"))
981                                 chip->is_k2 = 1;
982                 }
983         }
984         if (! chip->node)
985                 return -ENODEV;
986
987         if (!sound) {
988                 for_each_node_by_name(sound, "sound")
989                         if (sound->parent == chip->node)
990                                 break;
991         }
992         if (! sound) {
993                 of_node_put(chip->node);
994                 chip->node = NULL;
995                 return -ENODEV;
996         }
997         prop = of_get_property(sound, "sub-frame", NULL);
998         if (prop && *prop < 16)
999                 chip->subframe = *prop;
1000         prop = of_get_property(sound, "layout-id", NULL);
1001         if (prop) {
1002                 /* partly deprecate snd-powermac, for those machines
1003                  * that have a layout-id property for now */
1004                 printk(KERN_INFO "snd-powermac no longer handles any "
1005                                  "machines with a layout-id property "
1006                                  "in the device-tree, use snd-aoa.\n");
1007                 of_node_put(sound);
1008                 of_node_put(chip->node);
1009                 chip->node = NULL;
1010                 return -ENODEV;
1011         }
1012         /* This should be verified on older screamers */
1013         if (of_device_is_compatible(sound, "screamer")) {
1014                 chip->model = PMAC_SCREAMER;
1015                 // chip->can_byte_swap = 0; /* FIXME: check this */
1016         }
1017         if (of_device_is_compatible(sound, "burgundy")) {
1018                 chip->model = PMAC_BURGUNDY;
1019                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1020         }
1021         if (of_device_is_compatible(sound, "daca")) {
1022                 chip->model = PMAC_DACA;
1023                 chip->can_capture = 0;  /* no capture */
1024                 chip->can_duplex = 0;
1025                 // chip->can_byte_swap = 0; /* FIXME: check this */
1026                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1027         }
1028         if (of_device_is_compatible(sound, "tumbler")) {
1029                 chip->model = PMAC_TUMBLER;
1030                 chip->can_capture = of_machine_is_compatible("PowerMac4,2")
1031                                 || of_machine_is_compatible("PowerBook3,2")
1032                                 || of_machine_is_compatible("PowerBook3,3")
1033                                 || of_machine_is_compatible("PowerBook4,1")
1034                                 || of_machine_is_compatible("PowerBook4,2")
1035                                 || of_machine_is_compatible("PowerBook4,3");
1036                 chip->can_duplex = 0;
1037                 // chip->can_byte_swap = 0; /* FIXME: check this */
1038                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1039                 chip->freq_table = tumbler_freqs;
1040                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1041         }
1042         if (of_device_is_compatible(sound, "snapper")) {
1043                 chip->model = PMAC_SNAPPER;
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         prop = of_get_property(sound, "device-id", NULL);
1050         if (prop)
1051                 chip->device_id = *prop;
1052         dn = of_find_node_by_name(NULL, "perch");
1053         chip->has_iic = (dn != NULL);
1054         of_node_put(dn);
1055
1056         /* We need the PCI device for DMA allocations, let's use a crude method
1057          * for now ...
1058          */
1059         macio = macio_find(chip->node, macio_unknown);
1060         if (macio == NULL)
1061                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1062         else {
1063                 struct pci_dev *pdev = NULL;
1064
1065                 for_each_pci_dev(pdev) {
1066                         struct device_node *np = pci_device_to_OF_node(pdev);
1067                         if (np && np == macio->of_node) {
1068                                 chip->pdev = pdev;
1069                                 break;
1070                         }
1071                 }
1072         }
1073         if (chip->pdev == NULL)
1074                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1075                        " device !\n");
1076
1077         detect_byte_swap(chip);
1078
1079         /* look for a property saying what sample rates
1080            are available */
1081         prop = of_get_property(sound, "sample-rates", &l);
1082         if (! prop)
1083                 prop = of_get_property(sound, "output-frame-rates", &l);
1084         if (prop) {
1085                 int i;
1086                 chip->freqs_ok = 0;
1087                 for (l /= sizeof(int); l > 0; --l) {
1088                         unsigned int r = *prop++;
1089                         /* Apple 'Fixed' format */
1090                         if (r >= 0x10000)
1091                                 r >>= 16;
1092                         for (i = 0; i < chip->num_freqs; ++i) {
1093                                 if (r == chip->freq_table[i]) {
1094                                         chip->freqs_ok |= (1 << i);
1095                                         break;
1096                                 }
1097                         }
1098                 }
1099         } else {
1100                 /* assume only 44.1khz */
1101                 chip->freqs_ok = 1;
1102         }
1103
1104         of_node_put(sound);
1105         return 0;
1106 }
1107
1108 #ifdef PMAC_SUPPORT_AUTOMUTE
1109 /*
1110  * auto-mute
1111  */
1112 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1113                               struct snd_ctl_elem_value *ucontrol)
1114 {
1115         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1116         ucontrol->value.integer.value[0] = chip->auto_mute;
1117         return 0;
1118 }
1119
1120 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1121                               struct snd_ctl_elem_value *ucontrol)
1122 {
1123         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1124         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1125                 chip->auto_mute = !!ucontrol->value.integer.value[0];
1126                 if (chip->update_automute)
1127                         chip->update_automute(chip, 1);
1128                 return 1;
1129         }
1130         return 0;
1131 }
1132
1133 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1134                               struct snd_ctl_elem_value *ucontrol)
1135 {
1136         struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1137         if (chip->detect_headphone)
1138                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1139         else
1140                 ucontrol->value.integer.value[0] = 0;
1141         return 0;
1142 }
1143
1144 static struct snd_kcontrol_new auto_mute_controls[] = {
1145         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1146           .name = "Auto Mute Switch",
1147           .info = snd_pmac_boolean_mono_info,
1148           .get = pmac_auto_mute_get,
1149           .put = pmac_auto_mute_put,
1150         },
1151         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1152           .name = "Headphone Detection",
1153           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1154           .info = snd_pmac_boolean_mono_info,
1155           .get = pmac_hp_detect_get,
1156         },
1157 };
1158
1159 int snd_pmac_add_automute(struct snd_pmac *chip)
1160 {
1161         int err;
1162         chip->auto_mute = 1;
1163         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1164         if (err < 0) {
1165                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1166                 return err;
1167         }
1168         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1169         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1170 }
1171 #endif /* PMAC_SUPPORT_AUTOMUTE */
1172
1173 /*
1174  * create and detect a pmac chip record
1175  */
1176 int snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1177 {
1178         struct snd_pmac *chip;
1179         struct device_node *np;
1180         int i, err;
1181         unsigned int irq;
1182         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1183         static struct snd_device_ops ops = {
1184                 .dev_free =     snd_pmac_dev_free,
1185         };
1186
1187         *chip_return = NULL;
1188
1189         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1190         if (chip == NULL)
1191                 return -ENOMEM;
1192         chip->card = card;
1193
1194         spin_lock_init(&chip->reg_lock);
1195         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1196
1197         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1198         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1199
1200         if ((err = snd_pmac_detect(chip)) < 0)
1201                 goto __error;
1202
1203         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1204             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1205             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1206             snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1207                 err = -ENOMEM;
1208                 goto __error;
1209         }
1210
1211         np = chip->node;
1212         chip->requested = 0;
1213         if (chip->is_k2) {
1214                 static char *rnames[] = {
1215                         "Sound Control", "Sound DMA" };
1216                 for (i = 0; i < 2; i ++) {
1217                         if (of_address_to_resource(np->parent, i,
1218                                                    &chip->rsrc[i])) {
1219                                 printk(KERN_ERR "snd: can't translate rsrc "
1220                                        " %d (%s)\n", i, rnames[i]);
1221                                 err = -ENODEV;
1222                                 goto __error;
1223                         }
1224                         if (request_mem_region(chip->rsrc[i].start,
1225                                                resource_size(&chip->rsrc[i]),
1226                                                rnames[i]) == NULL) {
1227                                 printk(KERN_ERR "snd: can't request rsrc "
1228                                        " %d (%s: %pR)\n",
1229                                        i, rnames[i], &chip->rsrc[i]);
1230                                 err = -ENODEV;
1231                                 goto __error;
1232                         }
1233                         chip->requested |= (1 << i);
1234                 }
1235                 ctrl_addr = chip->rsrc[0].start;
1236                 txdma_addr = chip->rsrc[1].start;
1237                 rxdma_addr = txdma_addr + 0x100;
1238         } else {
1239                 static char *rnames[] = {
1240                         "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1241                 for (i = 0; i < 3; i ++) {
1242                         if (of_address_to_resource(np, i,
1243                                                    &chip->rsrc[i])) {
1244                                 printk(KERN_ERR "snd: can't translate rsrc "
1245                                        " %d (%s)\n", i, rnames[i]);
1246                                 err = -ENODEV;
1247                                 goto __error;
1248                         }
1249                         if (request_mem_region(chip->rsrc[i].start,
1250                                                resource_size(&chip->rsrc[i]),
1251                                                rnames[i]) == NULL) {
1252                                 printk(KERN_ERR "snd: can't request rsrc "
1253                                        " %d (%s: %pR)\n",
1254                                        i, rnames[i], &chip->rsrc[i]);
1255                                 err = -ENODEV;
1256                                 goto __error;
1257                         }
1258                         chip->requested |= (1 << i);
1259                 }
1260                 ctrl_addr = chip->rsrc[0].start;
1261                 txdma_addr = chip->rsrc[1].start;
1262                 rxdma_addr = chip->rsrc[2].start;
1263         }
1264
1265         chip->awacs = ioremap(ctrl_addr, 0x1000);
1266         chip->playback.dma = ioremap(txdma_addr, 0x100);
1267         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1268         if (chip->model <= PMAC_BURGUNDY) {
1269                 irq = irq_of_parse_and_map(np, 0);
1270                 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1271                                 "PMac", (void*)chip)) {
1272                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1273                                    irq);
1274                         err = -EBUSY;
1275                         goto __error;
1276                 }
1277                 chip->irq = irq;
1278         }
1279         irq = irq_of_parse_and_map(np, 1);
1280         if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1281                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1282                 err = -EBUSY;
1283                 goto __error;
1284         }
1285         chip->tx_irq = irq;
1286         irq = irq_of_parse_and_map(np, 2);
1287         if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1288                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1289                 err = -EBUSY;
1290                 goto __error;
1291         }
1292         chip->rx_irq = irq;
1293
1294         snd_pmac_sound_feature(chip, 1);
1295
1296         /* reset & enable interrupts */
1297         if (chip->model <= PMAC_BURGUNDY)
1298                 out_le32(&chip->awacs->control, chip->control_mask);
1299
1300         /* Powerbooks have odd ways of enabling inputs such as
1301            an expansion-bay CD or sound from an internal modem
1302            or a PC-card modem. */
1303         if (chip->is_pbook_3400) {
1304                 /* Enable CD and PC-card sound inputs. */
1305                 /* This is done by reading from address
1306                  * f301a000, + 0x10 to enable the expansion-bay
1307                  * CD sound input, + 0x80 to enable the PC-card
1308                  * sound input.  The 0x100 enables the SCSI bus
1309                  * terminator power.
1310                  */
1311                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1312                 in_8(chip->latch_base + 0x190);
1313         } else if (chip->is_pbook_G3) {
1314                 struct device_node* mio;
1315                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1316                         if (strcmp(mio->name, "mac-io") == 0) {
1317                                 struct resource r;
1318                                 if (of_address_to_resource(mio, 0, &r) == 0)
1319                                         chip->macio_base =
1320                                                 ioremap(r.start, 0x40);
1321                                 break;
1322                         }
1323                 }
1324                 /* Enable CD sound input. */
1325                 /* The relevant bits for writing to this byte are 0x8f.
1326                  * I haven't found out what the 0x80 bit does.
1327                  * For the 0xf bits, writing 3 or 7 enables the CD
1328                  * input, any other value disables it.  Values
1329                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1330                  * 4, 6, 8 - f enable the input from the modem.
1331                  */
1332                 if (chip->macio_base)
1333                         out_8(chip->macio_base + 0x37, 3);
1334         }
1335
1336         /* Reset dbdma channels */
1337         snd_pmac_dbdma_reset(chip);
1338
1339         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1340                 goto __error;
1341
1342         *chip_return = chip;
1343         return 0;
1344
1345  __error:
1346         snd_pmac_free(chip);
1347         return err;
1348 }
1349
1350
1351 /*
1352  * sleep notify for powerbook
1353  */
1354
1355 #ifdef CONFIG_PM
1356
1357 /*
1358  * Save state when going to sleep, restore it afterwards.
1359  */
1360
1361 void snd_pmac_suspend(struct snd_pmac *chip)
1362 {
1363         unsigned long flags;
1364
1365         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1366         if (chip->suspend)
1367                 chip->suspend(chip);
1368         snd_pcm_suspend_all(chip->pcm);
1369         spin_lock_irqsave(&chip->reg_lock, flags);
1370         snd_pmac_beep_stop(chip);
1371         spin_unlock_irqrestore(&chip->reg_lock, flags);
1372         if (chip->irq >= 0)
1373                 disable_irq(chip->irq);
1374         if (chip->tx_irq >= 0)
1375                 disable_irq(chip->tx_irq);
1376         if (chip->rx_irq >= 0)
1377                 disable_irq(chip->rx_irq);
1378         snd_pmac_sound_feature(chip, 0);
1379 }
1380
1381 void snd_pmac_resume(struct snd_pmac *chip)
1382 {
1383         snd_pmac_sound_feature(chip, 1);
1384         if (chip->resume)
1385                 chip->resume(chip);
1386         /* enable CD sound input */
1387         if (chip->macio_base && chip->is_pbook_G3)
1388                 out_8(chip->macio_base + 0x37, 3);
1389         else if (chip->is_pbook_3400)
1390                 in_8(chip->latch_base + 0x190);
1391
1392         snd_pmac_pcm_set_format(chip);
1393
1394         if (chip->irq >= 0)
1395                 enable_irq(chip->irq);
1396         if (chip->tx_irq >= 0)
1397                 enable_irq(chip->tx_irq);
1398         if (chip->rx_irq >= 0)
1399                 enable_irq(chip->rx_irq);
1400
1401         snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1402 }
1403
1404 #endif /* CONFIG_PM */
1405