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-rw-r--r--sound/ppc/pmac.c1328
1 files changed, 1328 insertions, 0 deletions
diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c
new file mode 100644
index 000000000000..6c4ed90f490e
--- /dev/null
+++ b/sound/ppc/pmac.c
@@ -0,0 +1,1328 @@
1/*
2 * PMac DBDMA lowlevel functions
3 *
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 * code based on dmasound.c.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22
23#include <sound/driver.h>
24#include <asm/io.h>
25#include <asm/irq.h>
26#include <linux/init.h>
27#include <linux/delay.h>
28#include <linux/slab.h>
29#include <linux/interrupt.h>
30#include <sound/core.h>
31#include "pmac.h"
32#include <sound/pcm_params.h>
33#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
34#include <asm/pmac_feature.h>
35#else
36#include <asm/feature.h>
37#endif
38
39
40#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
41static int snd_pmac_register_sleep_notifier(pmac_t *chip);
42static int snd_pmac_unregister_sleep_notifier(pmac_t *chip);
43static int snd_pmac_suspend(snd_card_t *card, pm_message_t state);
44static int snd_pmac_resume(snd_card_t *card);
45#endif
46
47
48/* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
49static int awacs_freqs[8] = {
50 44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
51};
52/* fixed frequency table for tumbler */
53static int tumbler_freqs[1] = {
54 44100
55};
56
57/*
58 * allocate DBDMA command arrays
59 */
60static int snd_pmac_dbdma_alloc(pmac_dbdma_t *rec, int size)
61{
62 rec->space = kmalloc(sizeof(struct dbdma_cmd) * (size + 1), GFP_KERNEL);
63 if (rec->space == NULL)
64 return -ENOMEM;
65 rec->size = size;
66 memset(rec->space, 0, sizeof(struct dbdma_cmd) * (size + 1));
67 rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
68 rec->addr = virt_to_bus(rec->cmds);
69 return 0;
70}
71
72static void snd_pmac_dbdma_free(pmac_dbdma_t *rec)
73{
74 if (rec)
75 kfree(rec->space);
76}
77
78
79/*
80 * pcm stuff
81 */
82
83/*
84 * look up frequency table
85 */
86
87unsigned int snd_pmac_rate_index(pmac_t *chip, pmac_stream_t *rec, unsigned int rate)
88{
89 int i, ok, found;
90
91 ok = rec->cur_freqs;
92 if (rate > chip->freq_table[0])
93 return 0;
94 found = 0;
95 for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
96 if (! (ok & 1)) continue;
97 found = i;
98 if (rate >= chip->freq_table[i])
99 break;
100 }
101 return found;
102}
103
104/*
105 * check whether another stream is active
106 */
107static inline int another_stream(int stream)
108{
109 return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
110 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
111}
112
113/*
114 * allocate buffers
115 */
116static int snd_pmac_pcm_hw_params(snd_pcm_substream_t *subs,
117 snd_pcm_hw_params_t *hw_params)
118{
119 return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
120}
121
122/*
123 * release buffers
124 */
125static int snd_pmac_pcm_hw_free(snd_pcm_substream_t *subs)
126{
127 snd_pcm_lib_free_pages(subs);
128 return 0;
129}
130
131/*
132 * get a stream of the opposite direction
133 */
134static pmac_stream_t *snd_pmac_get_stream(pmac_t *chip, int stream)
135{
136 switch (stream) {
137 case SNDRV_PCM_STREAM_PLAYBACK:
138 return &chip->playback;
139 case SNDRV_PCM_STREAM_CAPTURE:
140 return &chip->capture;
141 default:
142 snd_BUG();
143 return NULL;
144 }
145}
146
147/*
148 * wait while run status is on
149 */
150inline static void
151snd_pmac_wait_ack(pmac_stream_t *rec)
152{
153 int timeout = 50000;
154 while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
155 udelay(1);
156}
157
158/*
159 * set the format and rate to the chip.
160 * call the lowlevel function if defined (e.g. for AWACS).
161 */
162static void snd_pmac_pcm_set_format(pmac_t *chip)
163{
164 /* set up frequency and format */
165 out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
166 out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
167 if (chip->set_format)
168 chip->set_format(chip);
169}
170
171/*
172 * stop the DMA transfer
173 */
174inline static void snd_pmac_dma_stop(pmac_stream_t *rec)
175{
176 out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
177 snd_pmac_wait_ack(rec);
178}
179
180/*
181 * set the command pointer address
182 */
183inline static void snd_pmac_dma_set_command(pmac_stream_t *rec, pmac_dbdma_t *cmd)
184{
185 out_le32(&rec->dma->cmdptr, cmd->addr);
186}
187
188/*
189 * start the DMA
190 */
191inline static void snd_pmac_dma_run(pmac_stream_t *rec, int status)
192{
193 out_le32(&rec->dma->control, status | (status << 16));
194}
195
196
197/*
198 * prepare playback/capture stream
199 */
200static int snd_pmac_pcm_prepare(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
201{
202 int i;
203 volatile struct dbdma_cmd __iomem *cp;
204 snd_pcm_runtime_t *runtime = subs->runtime;
205 int rate_index;
206 long offset;
207 pmac_stream_t *astr;
208
209 rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
210 rec->period_size = snd_pcm_lib_period_bytes(subs);
211 rec->nperiods = rec->dma_size / rec->period_size;
212 rec->cur_period = 0;
213 rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
214
215 /* set up constraints */
216 astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
217 snd_runtime_check(astr, return -EINVAL);
218 astr->cur_freqs = 1 << rate_index;
219 astr->cur_formats = 1 << runtime->format;
220 chip->rate_index = rate_index;
221 chip->format = runtime->format;
222
223 /* We really want to execute a DMA stop command, after the AWACS
224 * is initialized.
225 * For reasons I don't understand, it stops the hissing noise
226 * common to many PowerBook G3 systems and random noise otherwise
227 * captured on iBook2's about every third time. -ReneR
228 */
229 spin_lock_irq(&chip->reg_lock);
230 snd_pmac_dma_stop(rec);
231 st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
232 snd_pmac_dma_set_command(rec, &chip->extra_dma);
233 snd_pmac_dma_run(rec, RUN);
234 spin_unlock_irq(&chip->reg_lock);
235 mdelay(5);
236 spin_lock_irq(&chip->reg_lock);
237 /* continuous DMA memory type doesn't provide the physical address,
238 * so we need to resolve the address here...
239 */
240 offset = virt_to_bus(runtime->dma_area);
241 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
242 st_le32(&cp->phy_addr, offset);
243 st_le16(&cp->req_count, rec->period_size);
244 /*st_le16(&cp->res_count, 0);*/
245 st_le16(&cp->xfer_status, 0);
246 offset += rec->period_size;
247 }
248 /* make loop */
249 st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
250 st_le32(&cp->cmd_dep, rec->cmd.addr);
251
252 snd_pmac_dma_stop(rec);
253 snd_pmac_dma_set_command(rec, &rec->cmd);
254 spin_unlock_irq(&chip->reg_lock);
255
256 return 0;
257}
258
259
260/*
261 * PCM trigger/stop
262 */
263static int snd_pmac_pcm_trigger(pmac_t *chip, pmac_stream_t *rec,
264 snd_pcm_substream_t *subs, int cmd)
265{
266 volatile struct dbdma_cmd __iomem *cp;
267 int i, command;
268
269 switch (cmd) {
270 case SNDRV_PCM_TRIGGER_START:
271 case SNDRV_PCM_TRIGGER_RESUME:
272 if (rec->running)
273 return -EBUSY;
274 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
275 OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
276 spin_lock(&chip->reg_lock);
277 snd_pmac_beep_stop(chip);
278 snd_pmac_pcm_set_format(chip);
279 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
280 out_le16(&cp->command, command);
281 snd_pmac_dma_set_command(rec, &rec->cmd);
282 (void)in_le32(&rec->dma->status);
283 snd_pmac_dma_run(rec, RUN|WAKE);
284 rec->running = 1;
285 spin_unlock(&chip->reg_lock);
286 break;
287
288 case SNDRV_PCM_TRIGGER_STOP:
289 case SNDRV_PCM_TRIGGER_SUSPEND:
290 spin_lock(&chip->reg_lock);
291 rec->running = 0;
292 /*printk("stopped!!\n");*/
293 snd_pmac_dma_stop(rec);
294 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
295 out_le16(&cp->command, DBDMA_STOP);
296 spin_unlock(&chip->reg_lock);
297 break;
298
299 default:
300 return -EINVAL;
301 }
302
303 return 0;
304}
305
306/*
307 * return the current pointer
308 */
309inline
310static snd_pcm_uframes_t snd_pmac_pcm_pointer(pmac_t *chip, pmac_stream_t *rec,
311 snd_pcm_substream_t *subs)
312{
313 int count = 0;
314
315#if 1 /* hmm.. how can we get the current dma pointer?? */
316 int stat;
317 volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
318 stat = ld_le16(&cp->xfer_status);
319 if (stat & (ACTIVE|DEAD)) {
320 count = in_le16(&cp->res_count);
321 if (count)
322 count = rec->period_size - count;
323 }
324#endif
325 count += rec->cur_period * rec->period_size;
326 /*printk("pointer=%d\n", count);*/
327 return bytes_to_frames(subs->runtime, count);
328}
329
330/*
331 * playback
332 */
333
334static int snd_pmac_playback_prepare(snd_pcm_substream_t *subs)
335{
336 pmac_t *chip = snd_pcm_substream_chip(subs);
337 return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
338}
339
340static int snd_pmac_playback_trigger(snd_pcm_substream_t *subs,
341 int cmd)
342{
343 pmac_t *chip = snd_pcm_substream_chip(subs);
344 return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
345}
346
347static snd_pcm_uframes_t snd_pmac_playback_pointer(snd_pcm_substream_t *subs)
348{
349 pmac_t *chip = snd_pcm_substream_chip(subs);
350 return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
351}
352
353
354/*
355 * capture
356 */
357
358static int snd_pmac_capture_prepare(snd_pcm_substream_t *subs)
359{
360 pmac_t *chip = snd_pcm_substream_chip(subs);
361 return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
362}
363
364static int snd_pmac_capture_trigger(snd_pcm_substream_t *subs,
365 int cmd)
366{
367 pmac_t *chip = snd_pcm_substream_chip(subs);
368 return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
369}
370
371static snd_pcm_uframes_t snd_pmac_capture_pointer(snd_pcm_substream_t *subs)
372{
373 pmac_t *chip = snd_pcm_substream_chip(subs);
374 return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
375}
376
377
378/*
379 * update playback/capture pointer from interrupts
380 */
381static void snd_pmac_pcm_update(pmac_t *chip, pmac_stream_t *rec)
382{
383 volatile struct dbdma_cmd __iomem *cp;
384 int c;
385 int stat;
386
387 spin_lock(&chip->reg_lock);
388 if (rec->running) {
389 cp = &rec->cmd.cmds[rec->cur_period];
390 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
391 stat = ld_le16(&cp->xfer_status);
392 if (! (stat & ACTIVE))
393 break;
394 /*printk("update frag %d\n", rec->cur_period);*/
395 st_le16(&cp->xfer_status, 0);
396 st_le16(&cp->req_count, rec->period_size);
397 /*st_le16(&cp->res_count, 0);*/
398 rec->cur_period++;
399 if (rec->cur_period >= rec->nperiods) {
400 rec->cur_period = 0;
401 cp = rec->cmd.cmds;
402 } else
403 cp++;
404 spin_unlock(&chip->reg_lock);
405 snd_pcm_period_elapsed(rec->substream);
406 spin_lock(&chip->reg_lock);
407 }
408 }
409 spin_unlock(&chip->reg_lock);
410}
411
412
413/*
414 * hw info
415 */
416
417static snd_pcm_hardware_t snd_pmac_playback =
418{
419 .info = (SNDRV_PCM_INFO_INTERLEAVED |
420 SNDRV_PCM_INFO_MMAP |
421 SNDRV_PCM_INFO_MMAP_VALID |
422 SNDRV_PCM_INFO_RESUME),
423 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
424 .rates = SNDRV_PCM_RATE_8000_44100,
425 .rate_min = 7350,
426 .rate_max = 44100,
427 .channels_min = 2,
428 .channels_max = 2,
429 .buffer_bytes_max = 131072,
430 .period_bytes_min = 256,
431 .period_bytes_max = 16384,
432 .periods_min = 3,
433 .periods_max = PMAC_MAX_FRAGS,
434};
435
436static snd_pcm_hardware_t snd_pmac_capture =
437{
438 .info = (SNDRV_PCM_INFO_INTERLEAVED |
439 SNDRV_PCM_INFO_MMAP |
440 SNDRV_PCM_INFO_MMAP_VALID |
441 SNDRV_PCM_INFO_RESUME),
442 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
443 .rates = SNDRV_PCM_RATE_8000_44100,
444 .rate_min = 7350,
445 .rate_max = 44100,
446 .channels_min = 2,
447 .channels_max = 2,
448 .buffer_bytes_max = 131072,
449 .period_bytes_min = 256,
450 .period_bytes_max = 16384,
451 .periods_min = 3,
452 .periods_max = PMAC_MAX_FRAGS,
453};
454
455
456#if 0 // NYI
457static int snd_pmac_hw_rule_rate(snd_pcm_hw_params_t *params,
458 snd_pcm_hw_rule_t *rule)
459{
460 pmac_t *chip = rule->private;
461 pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
462 int i, freq_table[8], num_freqs;
463
464 snd_runtime_check(rec, return -EINVAL);
465 num_freqs = 0;
466 for (i = chip->num_freqs - 1; i >= 0; i--) {
467 if (rec->cur_freqs & (1 << i))
468 freq_table[num_freqs++] = chip->freq_table[i];
469 }
470
471 return snd_interval_list(hw_param_interval(params, rule->var),
472 num_freqs, freq_table, 0);
473}
474
475static int snd_pmac_hw_rule_format(snd_pcm_hw_params_t *params,
476 snd_pcm_hw_rule_t *rule)
477{
478 pmac_t *chip = rule->private;
479 pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
480
481 snd_runtime_check(rec, return -EINVAL);
482 return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
483 rec->cur_formats);
484}
485#endif // NYI
486
487static int snd_pmac_pcm_open(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
488{
489 snd_pcm_runtime_t *runtime = subs->runtime;
490 int i, j, fflags;
491 static int typical_freqs[] = {
492 44100,
493 22050,
494 11025,
495 0,
496 };
497 static int typical_freq_flags[] = {
498 SNDRV_PCM_RATE_44100,
499 SNDRV_PCM_RATE_22050,
500 SNDRV_PCM_RATE_11025,
501 0,
502 };
503
504 /* look up frequency table and fill bit mask */
505 runtime->hw.rates = 0;
506 fflags = chip->freqs_ok;
507 for (i = 0; typical_freqs[i]; i++) {
508 for (j = 0; j < chip->num_freqs; j++) {
509 if ((chip->freqs_ok & (1 << j)) &&
510 chip->freq_table[j] == typical_freqs[i]) {
511 runtime->hw.rates |= typical_freq_flags[i];
512 fflags &= ~(1 << j);
513 break;
514 }
515 }
516 }
517 if (fflags) /* rest */
518 runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
519
520 /* check for minimum and maximum rates */
521 for (i = 0; i < chip->num_freqs; i++) {
522 if (chip->freqs_ok & (1 << i)) {
523 runtime->hw.rate_max = chip->freq_table[i];
524 break;
525 }
526 }
527 for (i = chip->num_freqs - 1; i >= 0; i--) {
528 if (chip->freqs_ok & (1 << i)) {
529 runtime->hw.rate_min = chip->freq_table[i];
530 break;
531 }
532 }
533 runtime->hw.formats = chip->formats_ok;
534 if (chip->can_capture) {
535 if (! chip->can_duplex)
536 runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
537 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
538 }
539 runtime->private_data = rec;
540 rec->substream = subs;
541
542#if 0 /* FIXME: still under development.. */
543 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
544 snd_pmac_hw_rule_rate, chip, rec->stream, -1);
545 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
546 snd_pmac_hw_rule_format, chip, rec->stream, -1);
547#endif
548
549 runtime->hw.periods_max = rec->cmd.size - 1;
550
551 if (chip->can_duplex)
552 snd_pcm_set_sync(subs);
553
554 /* constraints to fix choppy sound */
555 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
556 return 0;
557}
558
559static int snd_pmac_pcm_close(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
560{
561 pmac_stream_t *astr;
562
563 snd_pmac_dma_stop(rec);
564
565 astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
566 snd_runtime_check(astr, return -EINVAL);
567
568 /* reset constraints */
569 astr->cur_freqs = chip->freqs_ok;
570 astr->cur_formats = chip->formats_ok;
571
572 return 0;
573}
574
575static int snd_pmac_playback_open(snd_pcm_substream_t *subs)
576{
577 pmac_t *chip = snd_pcm_substream_chip(subs);
578
579 subs->runtime->hw = snd_pmac_playback;
580 return snd_pmac_pcm_open(chip, &chip->playback, subs);
581}
582
583static int snd_pmac_capture_open(snd_pcm_substream_t *subs)
584{
585 pmac_t *chip = snd_pcm_substream_chip(subs);
586
587 subs->runtime->hw = snd_pmac_capture;
588 return snd_pmac_pcm_open(chip, &chip->capture, subs);
589}
590
591static int snd_pmac_playback_close(snd_pcm_substream_t *subs)
592{
593 pmac_t *chip = snd_pcm_substream_chip(subs);
594
595 return snd_pmac_pcm_close(chip, &chip->playback, subs);
596}
597
598static int snd_pmac_capture_close(snd_pcm_substream_t *subs)
599{
600 pmac_t *chip = snd_pcm_substream_chip(subs);
601
602 return snd_pmac_pcm_close(chip, &chip->capture, subs);
603}
604
605/*
606 */
607
608static snd_pcm_ops_t snd_pmac_playback_ops = {
609 .open = snd_pmac_playback_open,
610 .close = snd_pmac_playback_close,
611 .ioctl = snd_pcm_lib_ioctl,
612 .hw_params = snd_pmac_pcm_hw_params,
613 .hw_free = snd_pmac_pcm_hw_free,
614 .prepare = snd_pmac_playback_prepare,
615 .trigger = snd_pmac_playback_trigger,
616 .pointer = snd_pmac_playback_pointer,
617};
618
619static snd_pcm_ops_t snd_pmac_capture_ops = {
620 .open = snd_pmac_capture_open,
621 .close = snd_pmac_capture_close,
622 .ioctl = snd_pcm_lib_ioctl,
623 .hw_params = snd_pmac_pcm_hw_params,
624 .hw_free = snd_pmac_pcm_hw_free,
625 .prepare = snd_pmac_capture_prepare,
626 .trigger = snd_pmac_capture_trigger,
627 .pointer = snd_pmac_capture_pointer,
628};
629
630static void pmac_pcm_free(snd_pcm_t *pcm)
631{
632 snd_pcm_lib_preallocate_free_for_all(pcm);
633}
634
635int __init snd_pmac_pcm_new(pmac_t *chip)
636{
637 snd_pcm_t *pcm;
638 int err;
639 int num_captures = 1;
640
641 if (! chip->can_capture)
642 num_captures = 0;
643 err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
644 if (err < 0)
645 return err;
646
647 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
648 if (chip->can_capture)
649 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
650
651 pcm->private_data = chip;
652 pcm->private_free = pmac_pcm_free;
653 pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
654 strcpy(pcm->name, chip->card->shortname);
655 chip->pcm = pcm;
656
657 chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
658 if (chip->can_byte_swap)
659 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
660
661 chip->playback.cur_formats = chip->formats_ok;
662 chip->capture.cur_formats = chip->formats_ok;
663 chip->playback.cur_freqs = chip->freqs_ok;
664 chip->capture.cur_freqs = chip->freqs_ok;
665
666 /* preallocate 64k buffer */
667 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
668 snd_dma_continuous_data(GFP_KERNEL),
669 64 * 1024, 64 * 1024);
670
671 return 0;
672}
673
674
675static void snd_pmac_dbdma_reset(pmac_t *chip)
676{
677 out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
678 snd_pmac_wait_ack(&chip->playback);
679 out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
680 snd_pmac_wait_ack(&chip->capture);
681}
682
683
684/*
685 * handling beep
686 */
687void snd_pmac_beep_dma_start(pmac_t *chip, int bytes, unsigned long addr, int speed)
688{
689 pmac_stream_t *rec = &chip->playback;
690
691 snd_pmac_dma_stop(rec);
692 st_le16(&chip->extra_dma.cmds->req_count, bytes);
693 st_le16(&chip->extra_dma.cmds->xfer_status, 0);
694 st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
695 st_le32(&chip->extra_dma.cmds->phy_addr, addr);
696 st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
697 out_le32(&chip->awacs->control,
698 (in_le32(&chip->awacs->control) & ~0x1f00)
699 | (speed << 8));
700 out_le32(&chip->awacs->byteswap, 0);
701 snd_pmac_dma_set_command(rec, &chip->extra_dma);
702 snd_pmac_dma_run(rec, RUN);
703}
704
705void snd_pmac_beep_dma_stop(pmac_t *chip)
706{
707 snd_pmac_dma_stop(&chip->playback);
708 st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
709 snd_pmac_pcm_set_format(chip); /* reset format */
710}
711
712
713/*
714 * interrupt handlers
715 */
716static irqreturn_t
717snd_pmac_tx_intr(int irq, void *devid, struct pt_regs *regs)
718{
719 pmac_t *chip = devid;
720 snd_pmac_pcm_update(chip, &chip->playback);
721 return IRQ_HANDLED;
722}
723
724
725static irqreturn_t
726snd_pmac_rx_intr(int irq, void *devid, struct pt_regs *regs)
727{
728 pmac_t *chip = devid;
729 snd_pmac_pcm_update(chip, &chip->capture);
730 return IRQ_HANDLED;
731}
732
733
734static irqreturn_t
735snd_pmac_ctrl_intr(int irq, void *devid, struct pt_regs *regs)
736{
737 pmac_t *chip = devid;
738 int ctrl = in_le32(&chip->awacs->control);
739
740 /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
741 if (ctrl & MASK_PORTCHG) {
742 /* do something when headphone is plugged/unplugged? */
743 if (chip->update_automute)
744 chip->update_automute(chip, 1);
745 }
746 if (ctrl & MASK_CNTLERR) {
747 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
748 if (err && chip->model <= PMAC_SCREAMER)
749 snd_printk(KERN_DEBUG "error %x\n", err);
750 }
751 /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
752 out_le32(&chip->awacs->control, ctrl);
753 return IRQ_HANDLED;
754}
755
756
757/*
758 * a wrapper to feature call for compatibility
759 */
760#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
761static void snd_pmac_sound_feature(pmac_t *chip, int enable)
762{
763#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
764 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
765#else
766 if (chip->is_pbook_G3) {
767 pmu_suspend();
768 feature_clear(chip->node, FEATURE_Sound_power);
769 feature_clear(chip->node, FEATURE_Sound_CLK_enable);
770 big_mdelay(1000); /* XXX */
771 pmu_resume();
772 }
773 if (chip->is_pbook_3400) {
774 feature_set(chip->node, FEATURE_IOBUS_enable);
775 udelay(10);
776 }
777#endif
778}
779#else /* CONFIG_PM && CONFIG_PMAC_PBOOK */
780#define snd_pmac_sound_feature(chip,enable) /**/
781#endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */
782
783/*
784 * release resources
785 */
786
787static int snd_pmac_free(pmac_t *chip)
788{
789 int i;
790
791 /* stop sounds */
792 if (chip->initialized) {
793 snd_pmac_dbdma_reset(chip);
794 /* disable interrupts from awacs interface */
795 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
796 }
797
798 snd_pmac_sound_feature(chip, 0);
799#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
800 snd_pmac_unregister_sleep_notifier(chip);
801#endif
802
803 /* clean up mixer if any */
804 if (chip->mixer_free)
805 chip->mixer_free(chip);
806
807 snd_pmac_detach_beep(chip);
808
809 /* release resources */
810 if (chip->irq >= 0)
811 free_irq(chip->irq, (void*)chip);
812 if (chip->tx_irq >= 0)
813 free_irq(chip->tx_irq, (void*)chip);
814 if (chip->rx_irq >= 0)
815 free_irq(chip->rx_irq, (void*)chip);
816 snd_pmac_dbdma_free(&chip->playback.cmd);
817 snd_pmac_dbdma_free(&chip->capture.cmd);
818 snd_pmac_dbdma_free(&chip->extra_dma);
819 if (chip->macio_base)
820 iounmap(chip->macio_base);
821 if (chip->latch_base)
822 iounmap(chip->latch_base);
823 if (chip->awacs)
824 iounmap(chip->awacs);
825 if (chip->playback.dma)
826 iounmap(chip->playback.dma);
827 if (chip->capture.dma)
828 iounmap(chip->capture.dma);
829 if (chip->node) {
830 for (i = 0; i < 3; i++) {
831 if (chip->of_requested & (1 << i))
832 release_OF_resource(chip->node, i);
833 }
834 }
835 kfree(chip);
836 return 0;
837}
838
839
840/*
841 * free the device
842 */
843static int snd_pmac_dev_free(snd_device_t *device)
844{
845 pmac_t *chip = device->device_data;
846 return snd_pmac_free(chip);
847}
848
849
850/*
851 * check the machine support byteswap (little-endian)
852 */
853
854static void __init detect_byte_swap(pmac_t *chip)
855{
856 struct device_node *mio;
857
858 /* if seems that Keylargo can't byte-swap */
859 for (mio = chip->node->parent; mio; mio = mio->parent) {
860 if (strcmp(mio->name, "mac-io") == 0) {
861 if (device_is_compatible(mio, "Keylargo"))
862 chip->can_byte_swap = 0;
863 break;
864 }
865 }
866
867 /* it seems the Pismo & iBook can't byte-swap in hardware. */
868 if (machine_is_compatible("PowerBook3,1") ||
869 machine_is_compatible("PowerBook2,1"))
870 chip->can_byte_swap = 0 ;
871
872 if (machine_is_compatible("PowerBook2,1"))
873 chip->can_duplex = 0;
874}
875
876
877/*
878 * detect a sound chip
879 */
880static int __init snd_pmac_detect(pmac_t *chip)
881{
882 struct device_node *sound;
883 unsigned int *prop, l;
884
885 if (_machine != _MACH_Pmac)
886 return -ENODEV;
887
888 chip->subframe = 0;
889 chip->revision = 0;
890 chip->freqs_ok = 0xff; /* all ok */
891 chip->model = PMAC_AWACS;
892 chip->can_byte_swap = 1;
893 chip->can_duplex = 1;
894 chip->can_capture = 1;
895 chip->num_freqs = ARRAY_SIZE(awacs_freqs);
896 chip->freq_table = awacs_freqs;
897
898 chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
899
900 /* check machine type */
901 if (machine_is_compatible("AAPL,3400/2400")
902 || machine_is_compatible("AAPL,3500"))
903 chip->is_pbook_3400 = 1;
904 else if (machine_is_compatible("PowerBook1,1")
905 || machine_is_compatible("AAPL,PowerBook1998"))
906 chip->is_pbook_G3 = 1;
907 chip->node = find_devices("awacs");
908 if (chip->node)
909 return 0; /* ok */
910
911 /*
912 * powermac G3 models have a node called "davbus"
913 * with a child called "sound".
914 */
915 chip->node = find_devices("davbus");
916 /*
917 * if we didn't find a davbus device, try 'i2s-a' since
918 * this seems to be what iBooks have
919 */
920 if (! chip->node)
921 chip->node = find_devices("i2s-a");
922 if (! chip->node)
923 return -ENODEV;
924 sound = find_devices("sound");
925 while (sound && sound->parent != chip->node)
926 sound = sound->next;
927 if (! sound)
928 return -ENODEV;
929 prop = (unsigned int *) get_property(sound, "sub-frame", NULL);
930 if (prop && *prop < 16)
931 chip->subframe = *prop;
932 /* This should be verified on older screamers */
933 if (device_is_compatible(sound, "screamer")) {
934 chip->model = PMAC_SCREAMER;
935 // chip->can_byte_swap = 0; /* FIXME: check this */
936 }
937 if (device_is_compatible(sound, "burgundy")) {
938 chip->model = PMAC_BURGUNDY;
939 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
940 }
941 if (device_is_compatible(sound, "daca")) {
942 chip->model = PMAC_DACA;
943 chip->can_capture = 0; /* no capture */
944 chip->can_duplex = 0;
945 // chip->can_byte_swap = 0; /* FIXME: check this */
946 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
947 }
948 if (device_is_compatible(sound, "tumbler")) {
949 chip->model = PMAC_TUMBLER;
950 chip->can_capture = 0; /* no capture */
951 chip->can_duplex = 0;
952 // chip->can_byte_swap = 0; /* FIXME: check this */
953 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
954 chip->freq_table = tumbler_freqs;
955 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
956 }
957 if (device_is_compatible(sound, "snapper")) {
958 chip->model = PMAC_SNAPPER;
959 // chip->can_byte_swap = 0; /* FIXME: check this */
960 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
961 chip->freq_table = tumbler_freqs;
962 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
963 }
964 if (device_is_compatible(sound, "AOAKeylargo")) {
965 /* Seems to support the stock AWACS frequencies, but has
966 a snapper mixer */
967 chip->model = PMAC_SNAPPER;
968 // chip->can_byte_swap = 0; /* FIXME: check this */
969 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
970 }
971 prop = (unsigned int *)get_property(sound, "device-id", NULL);
972 if (prop)
973 chip->device_id = *prop;
974 chip->has_iic = (find_devices("perch") != NULL);
975
976 detect_byte_swap(chip);
977
978 /* look for a property saying what sample rates
979 are available */
980 prop = (unsigned int *) get_property(sound, "sample-rates", &l);
981 if (! prop)
982 prop = (unsigned int *) get_property(sound, "output-frame-rates", &l);
983 if (prop) {
984 int i;
985 chip->freqs_ok = 0;
986 for (l /= sizeof(int); l > 0; --l) {
987 unsigned int r = *prop++;
988 /* Apple 'Fixed' format */
989 if (r >= 0x10000)
990 r >>= 16;
991 for (i = 0; i < chip->num_freqs; ++i) {
992 if (r == chip->freq_table[i]) {
993 chip->freqs_ok |= (1 << i);
994 break;
995 }
996 }
997 }
998 } else {
999 /* assume only 44.1khz */
1000 chip->freqs_ok = 1;
1001 }
1002
1003 return 0;
1004}
1005
1006/*
1007 * exported - boolean info callbacks for ease of programming
1008 */
1009int snd_pmac_boolean_stereo_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1010{
1011 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1012 uinfo->count = 2;
1013 uinfo->value.integer.min = 0;
1014 uinfo->value.integer.max = 1;
1015 return 0;
1016}
1017
1018int snd_pmac_boolean_mono_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
1019{
1020 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1021 uinfo->count = 1;
1022 uinfo->value.integer.min = 0;
1023 uinfo->value.integer.max = 1;
1024 return 0;
1025}
1026
1027#ifdef PMAC_SUPPORT_AUTOMUTE
1028/*
1029 * auto-mute
1030 */
1031static int pmac_auto_mute_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1032{
1033 pmac_t *chip = snd_kcontrol_chip(kcontrol);
1034 ucontrol->value.integer.value[0] = chip->auto_mute;
1035 return 0;
1036}
1037
1038static int pmac_auto_mute_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1039{
1040 pmac_t *chip = snd_kcontrol_chip(kcontrol);
1041 if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1042 chip->auto_mute = ucontrol->value.integer.value[0];
1043 if (chip->update_automute)
1044 chip->update_automute(chip, 1);
1045 return 1;
1046 }
1047 return 0;
1048}
1049
1050static int pmac_hp_detect_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1051{
1052 pmac_t *chip = snd_kcontrol_chip(kcontrol);
1053 if (chip->detect_headphone)
1054 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1055 else
1056 ucontrol->value.integer.value[0] = 0;
1057 return 0;
1058}
1059
1060static snd_kcontrol_new_t auto_mute_controls[] __initdata = {
1061 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1062 .name = "Auto Mute Switch",
1063 .info = snd_pmac_boolean_mono_info,
1064 .get = pmac_auto_mute_get,
1065 .put = pmac_auto_mute_put,
1066 },
1067 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1068 .name = "Headphone Detection",
1069 .access = SNDRV_CTL_ELEM_ACCESS_READ,
1070 .info = snd_pmac_boolean_mono_info,
1071 .get = pmac_hp_detect_get,
1072 },
1073};
1074
1075int __init snd_pmac_add_automute(pmac_t *chip)
1076{
1077 int err;
1078 chip->auto_mute = 1;
1079 err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1080 if (err < 0)
1081 return err;
1082 chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1083 return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1084}
1085#endif /* PMAC_SUPPORT_AUTOMUTE */
1086
1087/*
1088 * create and detect a pmac chip record
1089 */
1090int __init snd_pmac_new(snd_card_t *card, pmac_t **chip_return)
1091{
1092 pmac_t *chip;
1093 struct device_node *np;
1094 int i, err;
1095 static snd_device_ops_t ops = {
1096 .dev_free = snd_pmac_dev_free,
1097 };
1098
1099 snd_runtime_check(chip_return, return -EINVAL);
1100 *chip_return = NULL;
1101
1102 chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
1103 if (chip == NULL)
1104 return -ENOMEM;
1105 chip->card = card;
1106
1107 spin_lock_init(&chip->reg_lock);
1108 chip->irq = chip->tx_irq = chip->rx_irq = -1;
1109
1110 chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1111 chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1112
1113 if ((err = snd_pmac_detect(chip)) < 0)
1114 goto __error;
1115
1116 if (snd_pmac_dbdma_alloc(&chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1117 snd_pmac_dbdma_alloc(&chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1118 snd_pmac_dbdma_alloc(&chip->extra_dma, 2) < 0) {
1119 err = -ENOMEM;
1120 goto __error;
1121 }
1122
1123 np = chip->node;
1124 if (np->n_addrs < 3 || np->n_intrs < 3) {
1125 err = -ENODEV;
1126 goto __error;
1127 }
1128
1129 for (i = 0; i < 3; i++) {
1130 static char *name[3] = { NULL, "- Tx DMA", "- Rx DMA" };
1131 if (! request_OF_resource(np, i, name[i])) {
1132 snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
1133 err = -ENODEV;
1134 goto __error;
1135 }
1136 chip->of_requested |= (1 << i);
1137 }
1138
1139 chip->awacs = ioremap(np->addrs[0].address, 0x1000);
1140 chip->playback.dma = ioremap(np->addrs[1].address, 0x100);
1141 chip->capture.dma = ioremap(np->addrs[2].address, 0x100);
1142 if (chip->model <= PMAC_BURGUNDY) {
1143 if (request_irq(np->intrs[0].line, snd_pmac_ctrl_intr, 0,
1144 "PMac", (void*)chip)) {
1145 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[0].line);
1146 err = -EBUSY;
1147 goto __error;
1148 }
1149 chip->irq = np->intrs[0].line;
1150 }
1151 if (request_irq(np->intrs[1].line, snd_pmac_tx_intr, 0,
1152 "PMac Output", (void*)chip)) {
1153 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[1].line);
1154 err = -EBUSY;
1155 goto __error;
1156 }
1157 chip->tx_irq = np->intrs[1].line;
1158 if (request_irq(np->intrs[2].line, snd_pmac_rx_intr, 0,
1159 "PMac Input", (void*)chip)) {
1160 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[2].line);
1161 err = -EBUSY;
1162 goto __error;
1163 }
1164 chip->rx_irq = np->intrs[2].line;
1165
1166 snd_pmac_sound_feature(chip, 1);
1167
1168 /* reset */
1169 out_le32(&chip->awacs->control, 0x11);
1170
1171 /* Powerbooks have odd ways of enabling inputs such as
1172 an expansion-bay CD or sound from an internal modem
1173 or a PC-card modem. */
1174 if (chip->is_pbook_3400) {
1175 /* Enable CD and PC-card sound inputs. */
1176 /* This is done by reading from address
1177 * f301a000, + 0x10 to enable the expansion-bay
1178 * CD sound input, + 0x80 to enable the PC-card
1179 * sound input. The 0x100 enables the SCSI bus
1180 * terminator power.
1181 */
1182 chip->latch_base = ioremap (0xf301a000, 0x1000);
1183 in_8(chip->latch_base + 0x190);
1184 } else if (chip->is_pbook_G3) {
1185 struct device_node* mio;
1186 for (mio = chip->node->parent; mio; mio = mio->parent) {
1187 if (strcmp(mio->name, "mac-io") == 0
1188 && mio->n_addrs > 0) {
1189 chip->macio_base = ioremap(mio->addrs[0].address, 0x40);
1190 break;
1191 }
1192 }
1193 /* Enable CD sound input. */
1194 /* The relevant bits for writing to this byte are 0x8f.
1195 * I haven't found out what the 0x80 bit does.
1196 * For the 0xf bits, writing 3 or 7 enables the CD
1197 * input, any other value disables it. Values
1198 * 1, 3, 5, 7 enable the microphone. Values 0, 2,
1199 * 4, 6, 8 - f enable the input from the modem.
1200 */
1201 if (chip->macio_base)
1202 out_8(chip->macio_base + 0x37, 3);
1203 }
1204
1205 /* Reset dbdma channels */
1206 snd_pmac_dbdma_reset(chip);
1207
1208#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1209 /* add sleep notifier */
1210 if (! snd_pmac_register_sleep_notifier(chip))
1211 snd_card_set_pm_callback(chip->card, snd_pmac_suspend, snd_pmac_resume, chip);
1212#endif
1213
1214 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1215 goto __error;
1216
1217 *chip_return = chip;
1218 return 0;
1219
1220 __error:
1221 snd_pmac_free(chip);
1222 return err;
1223}
1224
1225
1226/*
1227 * sleep notify for powerbook
1228 */
1229
1230#if defined(CONFIG_PM) && defined(CONFIG_PMAC_PBOOK)
1231
1232/*
1233 * Save state when going to sleep, restore it afterwards.
1234 */
1235
1236static int snd_pmac_suspend(snd_card_t *card, pm_message_t state)
1237{
1238 pmac_t *chip = card->pm_private_data;
1239 unsigned long flags;
1240
1241 if (chip->suspend)
1242 chip->suspend(chip);
1243 snd_pcm_suspend_all(chip->pcm);
1244 spin_lock_irqsave(&chip->reg_lock, flags);
1245 snd_pmac_beep_stop(chip);
1246 spin_unlock_irqrestore(&chip->reg_lock, flags);
1247 if (chip->irq >= 0)
1248 disable_irq(chip->irq);
1249 if (chip->tx_irq >= 0)
1250 disable_irq(chip->tx_irq);
1251 if (chip->rx_irq >= 0)
1252 disable_irq(chip->rx_irq);
1253 snd_pmac_sound_feature(chip, 0);
1254 return 0;
1255}
1256
1257static int snd_pmac_resume(snd_card_t *card)
1258{
1259 pmac_t *chip = card->pm_private_data;
1260
1261 snd_pmac_sound_feature(chip, 1);
1262 if (chip->resume)
1263 chip->resume(chip);
1264 /* enable CD sound input */
1265 if (chip->macio_base && chip->is_pbook_G3) {
1266 out_8(chip->macio_base + 0x37, 3);
1267 } else if (chip->is_pbook_3400) {
1268 in_8(chip->latch_base + 0x190);
1269 }
1270
1271 snd_pmac_pcm_set_format(chip);
1272
1273 if (chip->irq >= 0)
1274 enable_irq(chip->irq);
1275 if (chip->tx_irq >= 0)
1276 enable_irq(chip->tx_irq);
1277 if (chip->rx_irq >= 0)
1278 enable_irq(chip->rx_irq);
1279
1280 return 0;
1281}
1282
1283/* the chip is stored statically by snd_pmac_register_sleep_notifier
1284 * because we can't have any private data for notify callback.
1285 */
1286static pmac_t *sleeping_pmac = NULL;
1287
1288static int snd_pmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
1289{
1290 pmac_t *chip;
1291
1292 chip = sleeping_pmac;
1293 snd_runtime_check(chip, return 0);
1294
1295 switch (when) {
1296 case PBOOK_SLEEP_NOW:
1297 snd_pmac_suspend(chip->card, PMSG_SUSPEND);
1298 break;
1299 case PBOOK_WAKE:
1300 snd_pmac_resume(chip->card);
1301 break;
1302 }
1303 return PBOOK_SLEEP_OK;
1304}
1305
1306static struct pmu_sleep_notifier snd_pmac_sleep_notifier = {
1307 snd_pmac_sleep_notify, SLEEP_LEVEL_SOUND,
1308};
1309
1310static int __init snd_pmac_register_sleep_notifier(pmac_t *chip)
1311{
1312 /* should be protected here.. */
1313 snd_assert(! sleeping_pmac, return -EBUSY);
1314 sleeping_pmac = chip;
1315 pmu_register_sleep_notifier(&snd_pmac_sleep_notifier);
1316 return 0;
1317}
1318
1319static int snd_pmac_unregister_sleep_notifier(pmac_t *chip)
1320{
1321 /* should be protected here.. */
1322 snd_assert(sleeping_pmac == chip, return -ENODEV);
1323 pmu_unregister_sleep_notifier(&snd_pmac_sleep_notifier);
1324 sleeping_pmac = NULL;
1325 return 0;
1326}
1327
1328#endif /* CONFIG_PM && CONFIG_PMAC_PBOOK */