[PATCH] Stop snd-powermac oopsing on non-pmac hardware.
[linux-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 <sound/driver.h>
24 #include <asm/io.h>
25 #include <asm/irq.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/slab.h>
29 #include <linux/interrupt.h>
30 #include <linux/pci.h>
31 #include <linux/dma-mapping.h>
32 #include <sound/core.h>
33 #include "pmac.h"
34 #include <sound/pcm_params.h>
35 #include <asm/pmac_feature.h>
36 #include <asm/pci-bridge.h>
37
38
39 #ifdef CONFIG_PM
40 static int snd_pmac_register_sleep_notifier(pmac_t *chip);
41 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip);
42 static int snd_pmac_suspend(snd_card_t *card, pm_message_t state);
43 static int snd_pmac_resume(snd_card_t *card);
44 #endif
45
46
47 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
48 static int awacs_freqs[8] = {
49         44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
50 };
51 /* fixed frequency table for tumbler */
52 static int tumbler_freqs[1] = {
53         44100
54 };
55
56 /*
57  * allocate DBDMA command arrays
58  */
59 static int snd_pmac_dbdma_alloc(pmac_t *chip, pmac_dbdma_t *rec, int size)
60 {
61         unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
62
63         rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
64                                         &rec->dma_base, GFP_KERNEL);
65         if (rec->space == NULL)
66                 return -ENOMEM;
67         rec->size = size;
68         memset(rec->space, 0, rsize);
69         rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
70         rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
71
72         return 0;
73 }
74
75 static void snd_pmac_dbdma_free(pmac_t *chip, pmac_dbdma_t *rec)
76 {
77         if (rec) {
78                 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
79
80                 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
81         }
82 }
83
84
85 /*
86  * pcm stuff
87  */
88
89 /*
90  * look up frequency table
91  */
92
93 unsigned int snd_pmac_rate_index(pmac_t *chip, pmac_stream_t *rec, unsigned int rate)
94 {
95         int i, ok, found;
96
97         ok = rec->cur_freqs;
98         if (rate > chip->freq_table[0])
99                 return 0;
100         found = 0;
101         for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
102                 if (! (ok & 1)) continue;
103                 found = i;
104                 if (rate >= chip->freq_table[i])
105                         break;
106         }
107         return found;
108 }
109
110 /*
111  * check whether another stream is active
112  */
113 static inline int another_stream(int stream)
114 {
115         return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
116                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
117 }
118
119 /*
120  * allocate buffers
121  */
122 static int snd_pmac_pcm_hw_params(snd_pcm_substream_t *subs,
123                                   snd_pcm_hw_params_t *hw_params)
124 {
125         return snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw_params));
126 }
127
128 /*
129  * release buffers
130  */
131 static int snd_pmac_pcm_hw_free(snd_pcm_substream_t *subs)
132 {
133         snd_pcm_lib_free_pages(subs);
134         return 0;
135 }
136
137 /*
138  * get a stream of the opposite direction
139  */
140 static pmac_stream_t *snd_pmac_get_stream(pmac_t *chip, int stream)
141 {
142         switch (stream) {
143         case SNDRV_PCM_STREAM_PLAYBACK:
144                 return &chip->playback;
145         case SNDRV_PCM_STREAM_CAPTURE:
146                 return &chip->capture;
147         default:
148                 snd_BUG();
149                 return NULL;
150         }
151 }
152
153 /*
154  * wait while run status is on
155  */
156 static inline void
157 snd_pmac_wait_ack(pmac_stream_t *rec)
158 {
159         int timeout = 50000;
160         while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
161                 udelay(1);
162 }
163
164 /*
165  * set the format and rate to the chip.
166  * call the lowlevel function if defined (e.g. for AWACS).
167  */
168 static void snd_pmac_pcm_set_format(pmac_t *chip)
169 {
170         /* set up frequency and format */
171         out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
172         out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
173         if (chip->set_format)
174                 chip->set_format(chip);
175 }
176
177 /*
178  * stop the DMA transfer
179  */
180 static inline void snd_pmac_dma_stop(pmac_stream_t *rec)
181 {
182         out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
183         snd_pmac_wait_ack(rec);
184 }
185
186 /*
187  * set the command pointer address
188  */
189 static inline void snd_pmac_dma_set_command(pmac_stream_t *rec, pmac_dbdma_t *cmd)
190 {
191         out_le32(&rec->dma->cmdptr, cmd->addr);
192 }
193
194 /*
195  * start the DMA
196  */
197 static inline void snd_pmac_dma_run(pmac_stream_t *rec, int status)
198 {
199         out_le32(&rec->dma->control, status | (status << 16));
200 }
201
202
203 /*
204  * prepare playback/capture stream
205  */
206 static int snd_pmac_pcm_prepare(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
207 {
208         int i;
209         volatile struct dbdma_cmd __iomem *cp;
210         snd_pcm_runtime_t *runtime = subs->runtime;
211         int rate_index;
212         long offset;
213         pmac_stream_t *astr;
214         
215         rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
216         rec->period_size = snd_pcm_lib_period_bytes(subs);
217         rec->nperiods = rec->dma_size / rec->period_size;
218         rec->cur_period = 0;
219         rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
220
221         /* set up constraints */
222         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
223         snd_runtime_check(astr, return -EINVAL);
224         astr->cur_freqs = 1 << rate_index;
225         astr->cur_formats = 1 << runtime->format;
226         chip->rate_index = rate_index;
227         chip->format = runtime->format;
228
229         /* We really want to execute a DMA stop command, after the AWACS
230          * is initialized.
231          * For reasons I don't understand, it stops the hissing noise
232          * common to many PowerBook G3 systems and random noise otherwise
233          * captured on iBook2's about every third time. -ReneR
234          */
235         spin_lock_irq(&chip->reg_lock);
236         snd_pmac_dma_stop(rec);
237         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
238         snd_pmac_dma_set_command(rec, &chip->extra_dma);
239         snd_pmac_dma_run(rec, RUN);
240         spin_unlock_irq(&chip->reg_lock);
241         mdelay(5);
242         spin_lock_irq(&chip->reg_lock);
243         /* continuous DMA memory type doesn't provide the physical address,
244          * so we need to resolve the address here...
245          */
246         offset = runtime->dma_addr;
247         for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
248                 st_le32(&cp->phy_addr, offset);
249                 st_le16(&cp->req_count, rec->period_size);
250                 /*st_le16(&cp->res_count, 0);*/
251                 st_le16(&cp->xfer_status, 0);
252                 offset += rec->period_size;
253         }
254         /* make loop */
255         st_le16(&cp->command, DBDMA_NOP + BR_ALWAYS);
256         st_le32(&cp->cmd_dep, rec->cmd.addr);
257
258         snd_pmac_dma_stop(rec);
259         snd_pmac_dma_set_command(rec, &rec->cmd);
260         spin_unlock_irq(&chip->reg_lock);
261
262         return 0;
263 }
264
265
266 /*
267  * PCM trigger/stop
268  */
269 static int snd_pmac_pcm_trigger(pmac_t *chip, pmac_stream_t *rec,
270                                 snd_pcm_substream_t *subs, int cmd)
271 {
272         volatile struct dbdma_cmd __iomem *cp;
273         int i, command;
274
275         switch (cmd) {
276         case SNDRV_PCM_TRIGGER_START:
277         case SNDRV_PCM_TRIGGER_RESUME:
278                 if (rec->running)
279                         return -EBUSY;
280                 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
281                            OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
282                 spin_lock(&chip->reg_lock);
283                 snd_pmac_beep_stop(chip);
284                 snd_pmac_pcm_set_format(chip);
285                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
286                         out_le16(&cp->command, command);
287                 snd_pmac_dma_set_command(rec, &rec->cmd);
288                 (void)in_le32(&rec->dma->status);
289                 snd_pmac_dma_run(rec, RUN|WAKE);
290                 rec->running = 1;
291                 spin_unlock(&chip->reg_lock);
292                 break;
293
294         case SNDRV_PCM_TRIGGER_STOP:
295         case SNDRV_PCM_TRIGGER_SUSPEND:
296                 spin_lock(&chip->reg_lock);
297                 rec->running = 0;
298                 /*printk("stopped!!\n");*/
299                 snd_pmac_dma_stop(rec);
300                 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
301                         out_le16(&cp->command, DBDMA_STOP);
302                 spin_unlock(&chip->reg_lock);
303                 break;
304
305         default:
306                 return -EINVAL;
307         }
308
309         return 0;
310 }
311
312 /*
313  * return the current pointer
314  */
315 inline
316 static snd_pcm_uframes_t snd_pmac_pcm_pointer(pmac_t *chip, pmac_stream_t *rec,
317                                               snd_pcm_substream_t *subs)
318 {
319         int count = 0;
320
321 #if 1 /* hmm.. how can we get the current dma pointer?? */
322         int stat;
323         volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
324         stat = ld_le16(&cp->xfer_status);
325         if (stat & (ACTIVE|DEAD)) {
326                 count = in_le16(&cp->res_count);
327                 if (count)
328                         count = rec->period_size - count;
329         }
330 #endif
331         count += rec->cur_period * rec->period_size;
332         /*printk("pointer=%d\n", count);*/
333         return bytes_to_frames(subs->runtime, count);
334 }
335
336 /*
337  * playback
338  */
339
340 static int snd_pmac_playback_prepare(snd_pcm_substream_t *subs)
341 {
342         pmac_t *chip = snd_pcm_substream_chip(subs);
343         return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
344 }
345
346 static int snd_pmac_playback_trigger(snd_pcm_substream_t *subs,
347                                      int cmd)
348 {
349         pmac_t *chip = snd_pcm_substream_chip(subs);
350         return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
351 }
352
353 static snd_pcm_uframes_t snd_pmac_playback_pointer(snd_pcm_substream_t *subs)
354 {
355         pmac_t *chip = snd_pcm_substream_chip(subs);
356         return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
357 }
358
359
360 /*
361  * capture
362  */
363
364 static int snd_pmac_capture_prepare(snd_pcm_substream_t *subs)
365 {
366         pmac_t *chip = snd_pcm_substream_chip(subs);
367         return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
368 }
369
370 static int snd_pmac_capture_trigger(snd_pcm_substream_t *subs,
371                                     int cmd)
372 {
373         pmac_t *chip = snd_pcm_substream_chip(subs);
374         return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
375 }
376
377 static snd_pcm_uframes_t snd_pmac_capture_pointer(snd_pcm_substream_t *subs)
378 {
379         pmac_t *chip = snd_pcm_substream_chip(subs);
380         return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
381 }
382
383
384 /*
385  * update playback/capture pointer from interrupts
386  */
387 static void snd_pmac_pcm_update(pmac_t *chip, pmac_stream_t *rec)
388 {
389         volatile struct dbdma_cmd __iomem *cp;
390         int c;
391         int stat;
392
393         spin_lock(&chip->reg_lock);
394         if (rec->running) {
395                 cp = &rec->cmd.cmds[rec->cur_period];
396                 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
397                         stat = ld_le16(&cp->xfer_status);
398                         if (! (stat & ACTIVE))
399                                 break;
400                         /*printk("update frag %d\n", rec->cur_period);*/
401                         st_le16(&cp->xfer_status, 0);
402                         st_le16(&cp->req_count, rec->period_size);
403                         /*st_le16(&cp->res_count, 0);*/
404                         rec->cur_period++;
405                         if (rec->cur_period >= rec->nperiods) {
406                                 rec->cur_period = 0;
407                                 cp = rec->cmd.cmds;
408                         } else
409                                 cp++;
410                         spin_unlock(&chip->reg_lock);
411                         snd_pcm_period_elapsed(rec->substream);
412                         spin_lock(&chip->reg_lock);
413                 }
414         }
415         spin_unlock(&chip->reg_lock);
416 }
417
418
419 /*
420  * hw info
421  */
422
423 static snd_pcm_hardware_t snd_pmac_playback =
424 {
425         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
426                                  SNDRV_PCM_INFO_MMAP |
427                                  SNDRV_PCM_INFO_MMAP_VALID |
428                                  SNDRV_PCM_INFO_RESUME),
429         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
430         .rates =                SNDRV_PCM_RATE_8000_44100,
431         .rate_min =             7350,
432         .rate_max =             44100,
433         .channels_min =         2,
434         .channels_max =         2,
435         .buffer_bytes_max =     131072,
436         .period_bytes_min =     256,
437         .period_bytes_max =     16384,
438         .periods_min =          3,
439         .periods_max =          PMAC_MAX_FRAGS,
440 };
441
442 static snd_pcm_hardware_t snd_pmac_capture =
443 {
444         .info =                 (SNDRV_PCM_INFO_INTERLEAVED |
445                                  SNDRV_PCM_INFO_MMAP |
446                                  SNDRV_PCM_INFO_MMAP_VALID |
447                                  SNDRV_PCM_INFO_RESUME),
448         .formats =              SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
449         .rates =                SNDRV_PCM_RATE_8000_44100,
450         .rate_min =             7350,
451         .rate_max =             44100,
452         .channels_min =         2,
453         .channels_max =         2,
454         .buffer_bytes_max =     131072,
455         .period_bytes_min =     256,
456         .period_bytes_max =     16384,
457         .periods_min =          3,
458         .periods_max =          PMAC_MAX_FRAGS,
459 };
460
461
462 #if 0 // NYI
463 static int snd_pmac_hw_rule_rate(snd_pcm_hw_params_t *params,
464                                  snd_pcm_hw_rule_t *rule)
465 {
466         pmac_t *chip = rule->private;
467         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
468         int i, freq_table[8], num_freqs;
469
470         snd_runtime_check(rec, return -EINVAL);
471         num_freqs = 0;
472         for (i = chip->num_freqs - 1; i >= 0; i--) {
473                 if (rec->cur_freqs & (1 << i))
474                         freq_table[num_freqs++] = chip->freq_table[i];
475         }
476
477         return snd_interval_list(hw_param_interval(params, rule->var),
478                                  num_freqs, freq_table, 0);
479 }
480
481 static int snd_pmac_hw_rule_format(snd_pcm_hw_params_t *params,
482                                    snd_pcm_hw_rule_t *rule)
483 {
484         pmac_t *chip = rule->private;
485         pmac_stream_t *rec = snd_pmac_get_stream(chip, rule->deps[0]);
486
487         snd_runtime_check(rec, return -EINVAL);
488         return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
489                                    rec->cur_formats);
490 }
491 #endif // NYI
492
493 static int snd_pmac_pcm_open(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
494 {
495         snd_pcm_runtime_t *runtime = subs->runtime;
496         int i, j, fflags;
497         static int typical_freqs[] = {
498                 44100,
499                 22050,
500                 11025,
501                 0,
502         };
503         static int typical_freq_flags[] = {
504                 SNDRV_PCM_RATE_44100,
505                 SNDRV_PCM_RATE_22050,
506                 SNDRV_PCM_RATE_11025,
507                 0,
508         };
509
510         /* look up frequency table and fill bit mask */
511         runtime->hw.rates = 0;
512         fflags = chip->freqs_ok;
513         for (i = 0; typical_freqs[i]; i++) {
514                 for (j = 0; j < chip->num_freqs; j++) {
515                         if ((chip->freqs_ok & (1 << j)) &&
516                             chip->freq_table[j] == typical_freqs[i]) {
517                                 runtime->hw.rates |= typical_freq_flags[i];
518                                 fflags &= ~(1 << j);
519                                 break;
520                         }
521                 }
522         }
523         if (fflags) /* rest */
524                 runtime->hw.rates |= SNDRV_PCM_RATE_KNOT;
525
526         /* check for minimum and maximum rates */
527         for (i = 0; i < chip->num_freqs; i++) {
528                 if (chip->freqs_ok & (1 << i)) {
529                         runtime->hw.rate_max = chip->freq_table[i];
530                         break;
531                 }
532         }
533         for (i = chip->num_freqs - 1; i >= 0; i--) {
534                 if (chip->freqs_ok & (1 << i)) {
535                         runtime->hw.rate_min = chip->freq_table[i];
536                         break;
537                 }
538         }
539         runtime->hw.formats = chip->formats_ok;
540         if (chip->can_capture) {
541                 if (! chip->can_duplex)
542                         runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
543                 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
544         }
545         runtime->private_data = rec;
546         rec->substream = subs;
547
548 #if 0 /* FIXME: still under development.. */
549         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
550                             snd_pmac_hw_rule_rate, chip, rec->stream, -1);
551         snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
552                             snd_pmac_hw_rule_format, chip, rec->stream, -1);
553 #endif
554
555         runtime->hw.periods_max = rec->cmd.size - 1;
556
557         if (chip->can_duplex)
558                 snd_pcm_set_sync(subs);
559
560         /* constraints to fix choppy sound */
561         snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
562         return 0;
563 }
564
565 static int snd_pmac_pcm_close(pmac_t *chip, pmac_stream_t *rec, snd_pcm_substream_t *subs)
566 {
567         pmac_stream_t *astr;
568
569         snd_pmac_dma_stop(rec);
570
571         astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
572         snd_runtime_check(astr, return -EINVAL);
573
574         /* reset constraints */
575         astr->cur_freqs = chip->freqs_ok;
576         astr->cur_formats = chip->formats_ok;
577         
578         return 0;
579 }
580
581 static int snd_pmac_playback_open(snd_pcm_substream_t *subs)
582 {
583         pmac_t *chip = snd_pcm_substream_chip(subs);
584
585         subs->runtime->hw = snd_pmac_playback;
586         return snd_pmac_pcm_open(chip, &chip->playback, subs);
587 }
588
589 static int snd_pmac_capture_open(snd_pcm_substream_t *subs)
590 {
591         pmac_t *chip = snd_pcm_substream_chip(subs);
592
593         subs->runtime->hw = snd_pmac_capture;
594         return snd_pmac_pcm_open(chip, &chip->capture, subs);
595 }
596
597 static int snd_pmac_playback_close(snd_pcm_substream_t *subs)
598 {
599         pmac_t *chip = snd_pcm_substream_chip(subs);
600
601         return snd_pmac_pcm_close(chip, &chip->playback, subs);
602 }
603
604 static int snd_pmac_capture_close(snd_pcm_substream_t *subs)
605 {
606         pmac_t *chip = snd_pcm_substream_chip(subs);
607
608         return snd_pmac_pcm_close(chip, &chip->capture, subs);
609 }
610
611 /*
612  */
613
614 static snd_pcm_ops_t snd_pmac_playback_ops = {
615         .open =         snd_pmac_playback_open,
616         .close =        snd_pmac_playback_close,
617         .ioctl =        snd_pcm_lib_ioctl,
618         .hw_params =    snd_pmac_pcm_hw_params,
619         .hw_free =      snd_pmac_pcm_hw_free,
620         .prepare =      snd_pmac_playback_prepare,
621         .trigger =      snd_pmac_playback_trigger,
622         .pointer =      snd_pmac_playback_pointer,
623 };
624
625 static snd_pcm_ops_t snd_pmac_capture_ops = {
626         .open =         snd_pmac_capture_open,
627         .close =        snd_pmac_capture_close,
628         .ioctl =        snd_pcm_lib_ioctl,
629         .hw_params =    snd_pmac_pcm_hw_params,
630         .hw_free =      snd_pmac_pcm_hw_free,
631         .prepare =      snd_pmac_capture_prepare,
632         .trigger =      snd_pmac_capture_trigger,
633         .pointer =      snd_pmac_capture_pointer,
634 };
635
636 static void pmac_pcm_free(snd_pcm_t *pcm)
637 {
638         snd_pcm_lib_preallocate_free_for_all(pcm);
639 }
640
641 int __init snd_pmac_pcm_new(pmac_t *chip)
642 {
643         snd_pcm_t *pcm;
644         int err;
645         int num_captures = 1;
646
647         if (! chip->can_capture)
648                 num_captures = 0;
649         err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
650         if (err < 0)
651                 return err;
652
653         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
654         if (chip->can_capture)
655                 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
656
657         pcm->private_data = chip;
658         pcm->private_free = pmac_pcm_free;
659         pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
660         strcpy(pcm->name, chip->card->shortname);
661         chip->pcm = pcm;
662
663         chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
664         if (chip->can_byte_swap)
665                 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
666
667         chip->playback.cur_formats = chip->formats_ok;
668         chip->capture.cur_formats = chip->formats_ok;
669         chip->playback.cur_freqs = chip->freqs_ok;
670         chip->capture.cur_freqs = chip->freqs_ok;
671
672         /* preallocate 64k buffer */
673         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
674                                               &chip->pdev->dev,
675                                               64 * 1024, 64 * 1024);
676
677         return 0;
678 }
679
680
681 static void snd_pmac_dbdma_reset(pmac_t *chip)
682 {
683         out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
684         snd_pmac_wait_ack(&chip->playback);
685         out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
686         snd_pmac_wait_ack(&chip->capture);
687 }
688
689
690 /*
691  * handling beep
692  */
693 void snd_pmac_beep_dma_start(pmac_t *chip, int bytes, unsigned long addr, int speed)
694 {
695         pmac_stream_t *rec = &chip->playback;
696
697         snd_pmac_dma_stop(rec);
698         st_le16(&chip->extra_dma.cmds->req_count, bytes);
699         st_le16(&chip->extra_dma.cmds->xfer_status, 0);
700         st_le32(&chip->extra_dma.cmds->cmd_dep, chip->extra_dma.addr);
701         st_le32(&chip->extra_dma.cmds->phy_addr, addr);
702         st_le16(&chip->extra_dma.cmds->command, OUTPUT_MORE + BR_ALWAYS);
703         out_le32(&chip->awacs->control,
704                  (in_le32(&chip->awacs->control) & ~0x1f00)
705                  | (speed << 8));
706         out_le32(&chip->awacs->byteswap, 0);
707         snd_pmac_dma_set_command(rec, &chip->extra_dma);
708         snd_pmac_dma_run(rec, RUN);
709 }
710
711 void snd_pmac_beep_dma_stop(pmac_t *chip)
712 {
713         snd_pmac_dma_stop(&chip->playback);
714         st_le16(&chip->extra_dma.cmds->command, DBDMA_STOP);
715         snd_pmac_pcm_set_format(chip); /* reset format */
716 }
717
718
719 /*
720  * interrupt handlers
721  */
722 static irqreturn_t
723 snd_pmac_tx_intr(int irq, void *devid, struct pt_regs *regs)
724 {
725         pmac_t *chip = devid;
726         snd_pmac_pcm_update(chip, &chip->playback);
727         return IRQ_HANDLED;
728 }
729
730
731 static irqreturn_t
732 snd_pmac_rx_intr(int irq, void *devid, struct pt_regs *regs)
733 {
734         pmac_t *chip = devid;
735         snd_pmac_pcm_update(chip, &chip->capture);
736         return IRQ_HANDLED;
737 }
738
739
740 static irqreturn_t
741 snd_pmac_ctrl_intr(int irq, void *devid, struct pt_regs *regs)
742 {
743         pmac_t *chip = devid;
744         int ctrl = in_le32(&chip->awacs->control);
745
746         /*printk("pmac: control interrupt.. 0x%x\n", ctrl);*/
747         if (ctrl & MASK_PORTCHG) {
748                 /* do something when headphone is plugged/unplugged? */
749                 if (chip->update_automute)
750                         chip->update_automute(chip, 1);
751         }
752         if (ctrl & MASK_CNTLERR) {
753                 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
754                 if (err && chip->model <= PMAC_SCREAMER)
755                         snd_printk(KERN_DEBUG "error %x\n", err);
756         }
757         /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
758         out_le32(&chip->awacs->control, ctrl);
759         return IRQ_HANDLED;
760 }
761
762
763 /*
764  * a wrapper to feature call for compatibility
765  */
766 static void snd_pmac_sound_feature(pmac_t *chip, int enable)
767 {
768         if (ppc_md.feature_call)
769                 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
770 }
771
772 /*
773  * release resources
774  */
775
776 static int snd_pmac_free(pmac_t *chip)
777 {
778         /* stop sounds */
779         if (chip->initialized) {
780                 snd_pmac_dbdma_reset(chip);
781                 /* disable interrupts from awacs interface */
782                 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
783         }
784
785         snd_pmac_sound_feature(chip, 0);
786 #ifdef CONFIG_PM
787         snd_pmac_unregister_sleep_notifier(chip);
788 #endif
789
790         /* clean up mixer if any */
791         if (chip->mixer_free)
792                 chip->mixer_free(chip);
793
794         snd_pmac_detach_beep(chip);
795
796         /* release resources */
797         if (chip->irq >= 0)
798                 free_irq(chip->irq, (void*)chip);
799         if (chip->tx_irq >= 0)
800                 free_irq(chip->tx_irq, (void*)chip);
801         if (chip->rx_irq >= 0)
802                 free_irq(chip->rx_irq, (void*)chip);
803         snd_pmac_dbdma_free(chip, &chip->playback.cmd);
804         snd_pmac_dbdma_free(chip, &chip->capture.cmd);
805         snd_pmac_dbdma_free(chip, &chip->extra_dma);
806         if (chip->macio_base)
807                 iounmap(chip->macio_base);
808         if (chip->latch_base)
809                 iounmap(chip->latch_base);
810         if (chip->awacs)
811                 iounmap(chip->awacs);
812         if (chip->playback.dma)
813                 iounmap(chip->playback.dma);
814         if (chip->capture.dma)
815                 iounmap(chip->capture.dma);
816 #ifndef CONFIG_PPC64
817         if (chip->node) {
818                 int i;
819
820                 for (i = 0; i < 3; i++) {
821                         if (chip->of_requested & (1 << i)) {
822                                 if (chip->is_k2)
823                                         release_OF_resource(chip->node->parent,
824                                                             i);
825                                 else
826                                         release_OF_resource(chip->node, i);
827                         }
828                 }
829         }
830 #endif /* CONFIG_PPC64 */
831         if (chip->pdev)
832                 pci_dev_put(chip->pdev);
833         kfree(chip);
834         return 0;
835 }
836
837
838 /*
839  * free the device
840  */
841 static int snd_pmac_dev_free(snd_device_t *device)
842 {
843         pmac_t *chip = device->device_data;
844         return snd_pmac_free(chip);
845 }
846
847
848 /*
849  * check the machine support byteswap (little-endian)
850  */
851
852 static void __init detect_byte_swap(pmac_t *chip)
853 {
854         struct device_node *mio;
855
856         /* if seems that Keylargo can't byte-swap  */
857         for (mio = chip->node->parent; mio; mio = mio->parent) {
858                 if (strcmp(mio->name, "mac-io") == 0) {
859                         if (device_is_compatible(mio, "Keylargo"))
860                                 chip->can_byte_swap = 0;
861                         break;
862                 }
863         }
864
865         /* it seems the Pismo & iBook can't byte-swap in hardware. */
866         if (machine_is_compatible("PowerBook3,1") ||
867             machine_is_compatible("PowerBook2,1"))
868                 chip->can_byte_swap = 0 ;
869
870         if (machine_is_compatible("PowerBook2,1"))
871                 chip->can_duplex = 0;
872 }
873
874
875 /*
876  * detect a sound chip
877  */
878 static int __init snd_pmac_detect(pmac_t *chip)
879 {
880         struct device_node *sound = NULL;
881         unsigned int *prop, l;
882         struct macio_chip* macio;
883
884         u32 layout_id = 0;
885
886         if (_machine != _MACH_Pmac)
887                 return -ENODEV;
888
889         chip->subframe = 0;
890         chip->revision = 0;
891         chip->freqs_ok = 0xff; /* all ok */
892         chip->model = PMAC_AWACS;
893         chip->can_byte_swap = 1;
894         chip->can_duplex = 1;
895         chip->can_capture = 1;
896         chip->num_freqs = ARRAY_SIZE(awacs_freqs);
897         chip->freq_table = awacs_freqs;
898
899         chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
900
901         /* check machine type */
902         if (machine_is_compatible("AAPL,3400/2400")
903             || machine_is_compatible("AAPL,3500"))
904                 chip->is_pbook_3400 = 1;
905         else if (machine_is_compatible("PowerBook1,1")
906                  || machine_is_compatible("AAPL,PowerBook1998"))
907                 chip->is_pbook_G3 = 1;
908         chip->node = find_devices("awacs");
909         if (chip->node)
910                 sound = chip->node;
911
912         /*
913          * powermac G3 models have a node called "davbus"
914          * with a child called "sound".
915          */
916         if (!chip->node)
917                 chip->node = find_devices("davbus");
918         /*
919          * if we didn't find a davbus device, try 'i2s-a' since
920          * this seems to be what iBooks have
921          */
922         if (! chip->node) {
923                 chip->node = find_devices("i2s-a");
924                 if (chip->node && chip->node->parent &&
925                     chip->node->parent->parent) {
926                         if (device_is_compatible(chip->node->parent->parent,
927                                                  "K2-Keylargo"))
928                                 chip->is_k2 = 1;
929                 }
930         }
931         if (! chip->node)
932                 return -ENODEV;
933
934         if (!sound) {
935                 sound = find_devices("sound");
936                 while (sound && sound->parent != chip->node)
937                         sound = sound->next;
938         }
939         if (! sound)
940                 return -ENODEV;
941         prop = (unsigned int *) get_property(sound, "sub-frame", NULL);
942         if (prop && *prop < 16)
943                 chip->subframe = *prop;
944         prop = (unsigned int *) get_property(sound, "layout-id", NULL);
945         if (prop)
946                 layout_id = *prop;
947         /* This should be verified on older screamers */
948         if (device_is_compatible(sound, "screamer")) {
949                 chip->model = PMAC_SCREAMER;
950                 // chip->can_byte_swap = 0; /* FIXME: check this */
951         }
952         if (device_is_compatible(sound, "burgundy")) {
953                 chip->model = PMAC_BURGUNDY;
954                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
955         }
956         if (device_is_compatible(sound, "daca")) {
957                 chip->model = PMAC_DACA;
958                 chip->can_capture = 0;  /* no capture */
959                 chip->can_duplex = 0;
960                 // chip->can_byte_swap = 0; /* FIXME: check this */
961                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
962         }
963         if (device_is_compatible(sound, "tumbler")) {
964                 chip->model = PMAC_TUMBLER;
965                 chip->can_capture = 0;  /* no capture */
966                 chip->can_duplex = 0;
967                 // chip->can_byte_swap = 0; /* FIXME: check this */
968                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
969                 chip->freq_table = tumbler_freqs;
970                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
971         }
972         if (device_is_compatible(sound, "snapper")) {
973                 chip->model = PMAC_SNAPPER;
974                 // chip->can_byte_swap = 0; /* FIXME: check this */
975                 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
976                 chip->freq_table = tumbler_freqs;
977                 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
978         }
979         if (device_is_compatible(sound, "AOAKeylargo") ||
980             device_is_compatible(sound, "AOAbase") ||
981             device_is_compatible(sound, "AOAK2")) {
982                 /* For now, only support very basic TAS3004 based machines with
983                  * single frequency until proper i2s control is implemented
984                  */
985                 switch(layout_id) {
986                 case 0x48:
987                 case 0x46:
988                 case 0x33:
989                 case 0x29:
990                 case 0x24:
991                         chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
992                         chip->model = PMAC_SNAPPER;
993                         chip->can_byte_swap = 0; /* FIXME: check this */
994                         chip->control_mask = MASK_IEPC | 0x11;/* disable IEE */
995                         break;
996                 case 0x3a:
997                         chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
998                         chip->model = PMAC_TOONIE;
999                         chip->can_byte_swap = 0; /* FIXME: check this */
1000                         chip->control_mask = MASK_IEPC | 0x11;/* disable IEE */
1001                         break;
1002                 }
1003         }
1004         prop = (unsigned int *)get_property(sound, "device-id", NULL);
1005         if (prop)
1006                 chip->device_id = *prop;
1007         chip->has_iic = (find_devices("perch") != NULL);
1008
1009         /* We need the PCI device for DMA allocations, let's use a crude method
1010          * for now ...
1011          */
1012         macio = macio_find(chip->node, macio_unknown);
1013         if (macio == NULL)
1014                 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1015         else {
1016                 struct pci_dev *pdev = NULL;
1017
1018                 for_each_pci_dev(pdev) {
1019                         struct device_node *np = pci_device_to_OF_node(pdev);
1020                         if (np && np == macio->of_node) {
1021                                 chip->pdev = pdev;
1022                                 break;
1023                         }
1024                 }
1025         }
1026         if (chip->pdev == NULL)
1027                 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1028                        " device !\n");
1029
1030         detect_byte_swap(chip);
1031
1032         /* look for a property saying what sample rates
1033            are available */
1034         prop = (unsigned int *) get_property(sound, "sample-rates", &l);
1035         if (! prop)
1036                 prop = (unsigned int *) get_property(sound,
1037                                                      "output-frame-rates", &l);
1038         if (prop) {
1039                 int i;
1040                 chip->freqs_ok = 0;
1041                 for (l /= sizeof(int); l > 0; --l) {
1042                         unsigned int r = *prop++;
1043                         /* Apple 'Fixed' format */
1044                         if (r >= 0x10000)
1045                                 r >>= 16;
1046                         for (i = 0; i < chip->num_freqs; ++i) {
1047                                 if (r == chip->freq_table[i]) {
1048                                         chip->freqs_ok |= (1 << i);
1049                                         break;
1050                                 }
1051                         }
1052                 }
1053         } else {
1054                 /* assume only 44.1khz */
1055                 chip->freqs_ok = 1;
1056         }
1057
1058         return 0;
1059 }
1060
1061 /*
1062  * exported - boolean info callbacks for ease of programming
1063  */
1064 int snd_pmac_boolean_stereo_info(snd_kcontrol_t *kcontrol,
1065                                  snd_ctl_elem_info_t *uinfo)
1066 {
1067         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1068         uinfo->count = 2;
1069         uinfo->value.integer.min = 0;
1070         uinfo->value.integer.max = 1;
1071         return 0;
1072 }
1073
1074 int snd_pmac_boolean_mono_info(snd_kcontrol_t *kcontrol,
1075                                snd_ctl_elem_info_t *uinfo)
1076 {
1077         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
1078         uinfo->count = 1;
1079         uinfo->value.integer.min = 0;
1080         uinfo->value.integer.max = 1;
1081         return 0;
1082 }
1083
1084 #ifdef PMAC_SUPPORT_AUTOMUTE
1085 /*
1086  * auto-mute
1087  */
1088 static int pmac_auto_mute_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1089 {
1090         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1091         ucontrol->value.integer.value[0] = chip->auto_mute;
1092         return 0;
1093 }
1094
1095 static int pmac_auto_mute_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1096 {
1097         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1098         if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1099                 chip->auto_mute = ucontrol->value.integer.value[0];
1100                 if (chip->update_automute)
1101                         chip->update_automute(chip, 1);
1102                 return 1;
1103         }
1104         return 0;
1105 }
1106
1107 static int pmac_hp_detect_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
1108 {
1109         pmac_t *chip = snd_kcontrol_chip(kcontrol);
1110         if (chip->detect_headphone)
1111                 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1112         else
1113                 ucontrol->value.integer.value[0] = 0;
1114         return 0;
1115 }
1116
1117 static snd_kcontrol_new_t auto_mute_controls[] __initdata = {
1118         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1119           .name = "Auto Mute Switch",
1120           .info = snd_pmac_boolean_mono_info,
1121           .get = pmac_auto_mute_get,
1122           .put = pmac_auto_mute_put,
1123         },
1124         { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1125           .name = "Headphone Detection",
1126           .access = SNDRV_CTL_ELEM_ACCESS_READ,
1127           .info = snd_pmac_boolean_mono_info,
1128           .get = pmac_hp_detect_get,
1129         },
1130 };
1131
1132 int __init snd_pmac_add_automute(pmac_t *chip)
1133 {
1134         int err;
1135         chip->auto_mute = 1;
1136         err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1137         if (err < 0) {
1138                 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1139                 return err;
1140         }
1141         chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1142         return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1143 }
1144 #endif /* PMAC_SUPPORT_AUTOMUTE */
1145
1146 /*
1147  * create and detect a pmac chip record
1148  */
1149 int __init snd_pmac_new(snd_card_t *card, pmac_t **chip_return)
1150 {
1151         pmac_t *chip;
1152         struct device_node *np;
1153         int i, err;
1154         unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1155         static snd_device_ops_t ops = {
1156                 .dev_free =     snd_pmac_dev_free,
1157         };
1158
1159         snd_runtime_check(chip_return, return -EINVAL);
1160         *chip_return = NULL;
1161
1162         chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
1163         if (chip == NULL)
1164                 return -ENOMEM;
1165         chip->card = card;
1166
1167         spin_lock_init(&chip->reg_lock);
1168         chip->irq = chip->tx_irq = chip->rx_irq = -1;
1169
1170         chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1171         chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1172
1173         if ((err = snd_pmac_detect(chip)) < 0)
1174                 goto __error;
1175
1176         if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1177             snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1178             snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0) {
1179                 err = -ENOMEM;
1180                 goto __error;
1181         }
1182
1183         np = chip->node;
1184         if (chip->is_k2) {
1185                 if (np->parent->n_addrs < 2 || np->n_intrs < 3) {
1186                         err = -ENODEV;
1187                         goto __error;
1188                 }
1189                 for (i = 0; i < 2; i++) {
1190 #ifndef CONFIG_PPC64
1191                         static char *name[2] = { "- Control", "- DMA" };
1192                         if (! request_OF_resource(np->parent, i, name[i])) {
1193                                 snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
1194                                 err = -ENODEV;
1195                                 goto __error;
1196                         }
1197                         chip->of_requested |= (1 << i);
1198 #endif /* CONFIG_PPC64 */
1199                         ctrl_addr = np->parent->addrs[0].address;
1200                         txdma_addr = np->parent->addrs[1].address;
1201                         rxdma_addr = txdma_addr + 0x100;
1202                 }
1203
1204         } else {
1205                 if (np->n_addrs < 3 || np->n_intrs < 3) {
1206                         err = -ENODEV;
1207                         goto __error;
1208                 }
1209
1210                 for (i = 0; i < 3; i++) {
1211 #ifndef CONFIG_PPC64
1212                         static char *name[3] = { "- Control", "- Tx DMA", "- Rx DMA" };
1213                         if (! request_OF_resource(np, i, name[i])) {
1214                                 snd_printk(KERN_ERR "pmac: can't request resource %d!\n", i);
1215                                 err = -ENODEV;
1216                                 goto __error;
1217                         }
1218                         chip->of_requested |= (1 << i);
1219 #endif /* CONFIG_PPC64 */
1220                         ctrl_addr = np->addrs[0].address;
1221                         txdma_addr = np->addrs[1].address;
1222                         rxdma_addr = np->addrs[2].address;
1223                 }
1224         }
1225
1226         chip->awacs = ioremap(ctrl_addr, 0x1000);
1227         chip->playback.dma = ioremap(txdma_addr, 0x100);
1228         chip->capture.dma = ioremap(rxdma_addr, 0x100);
1229         if (chip->model <= PMAC_BURGUNDY) {
1230                 if (request_irq(np->intrs[0].line, snd_pmac_ctrl_intr, 0,
1231                                 "PMac", (void*)chip)) {
1232                         snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[0].line);
1233                         err = -EBUSY;
1234                         goto __error;
1235                 }
1236                 chip->irq = np->intrs[0].line;
1237         }
1238         if (request_irq(np->intrs[1].line, snd_pmac_tx_intr, 0,
1239                         "PMac Output", (void*)chip)) {
1240                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[1].line);
1241                 err = -EBUSY;
1242                 goto __error;
1243         }
1244         chip->tx_irq = np->intrs[1].line;
1245         if (request_irq(np->intrs[2].line, snd_pmac_rx_intr, 0,
1246                         "PMac Input", (void*)chip)) {
1247                 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", np->intrs[2].line);
1248                 err = -EBUSY;
1249                 goto __error;
1250         }
1251         chip->rx_irq = np->intrs[2].line;
1252
1253         snd_pmac_sound_feature(chip, 1);
1254
1255         /* reset */
1256         if (chip->model == PMAC_AWACS)
1257                 out_le32(&chip->awacs->control, 0x11);
1258
1259         /* Powerbooks have odd ways of enabling inputs such as
1260            an expansion-bay CD or sound from an internal modem
1261            or a PC-card modem. */
1262         if (chip->is_pbook_3400) {
1263                 /* Enable CD and PC-card sound inputs. */
1264                 /* This is done by reading from address
1265                  * f301a000, + 0x10 to enable the expansion-bay
1266                  * CD sound input, + 0x80 to enable the PC-card
1267                  * sound input.  The 0x100 enables the SCSI bus
1268                  * terminator power.
1269                  */
1270                 chip->latch_base = ioremap (0xf301a000, 0x1000);
1271                 in_8(chip->latch_base + 0x190);
1272         } else if (chip->is_pbook_G3) {
1273                 struct device_node* mio;
1274                 for (mio = chip->node->parent; mio; mio = mio->parent) {
1275                         if (strcmp(mio->name, "mac-io") == 0
1276                             && mio->n_addrs > 0) {
1277                                 chip->macio_base = ioremap(mio->addrs[0].address, 0x40);
1278                                 break;
1279                         }
1280                 }
1281                 /* Enable CD sound input. */
1282                 /* The relevant bits for writing to this byte are 0x8f.
1283                  * I haven't found out what the 0x80 bit does.
1284                  * For the 0xf bits, writing 3 or 7 enables the CD
1285                  * input, any other value disables it.  Values
1286                  * 1, 3, 5, 7 enable the microphone.  Values 0, 2,
1287                  * 4, 6, 8 - f enable the input from the modem.
1288                  */
1289                 if (chip->macio_base)
1290                         out_8(chip->macio_base + 0x37, 3);
1291         }
1292
1293         /* Reset dbdma channels */
1294         snd_pmac_dbdma_reset(chip);
1295
1296 #ifdef CONFIG_PM
1297         /* add sleep notifier */
1298         if (! snd_pmac_register_sleep_notifier(chip))
1299                 snd_card_set_pm_callback(chip->card, snd_pmac_suspend, snd_pmac_resume, chip);
1300 #endif
1301
1302         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
1303                 goto __error;
1304
1305         *chip_return = chip;
1306         return 0;
1307
1308  __error:
1309         if (chip->pdev)
1310                 pci_dev_put(chip->pdev);
1311         snd_pmac_free(chip);
1312         return err;
1313 }
1314
1315
1316 /*
1317  * sleep notify for powerbook
1318  */
1319
1320 #ifdef CONFIG_PM
1321
1322 /*
1323  * Save state when going to sleep, restore it afterwards.
1324  */
1325
1326 static int snd_pmac_suspend(snd_card_t *card, pm_message_t state)
1327 {
1328         pmac_t *chip = card->pm_private_data;
1329         unsigned long flags;
1330
1331         if (chip->suspend)
1332                 chip->suspend(chip);
1333         snd_pcm_suspend_all(chip->pcm);
1334         spin_lock_irqsave(&chip->reg_lock, flags);
1335         snd_pmac_beep_stop(chip);
1336         spin_unlock_irqrestore(&chip->reg_lock, flags);
1337         if (chip->irq >= 0)
1338                 disable_irq(chip->irq);
1339         if (chip->tx_irq >= 0)
1340                 disable_irq(chip->tx_irq);
1341         if (chip->rx_irq >= 0)
1342                 disable_irq(chip->rx_irq);
1343         snd_pmac_sound_feature(chip, 0);
1344         return 0;
1345 }
1346
1347 static int snd_pmac_resume(snd_card_t *card)
1348 {
1349         pmac_t *chip = card->pm_private_data;
1350
1351         snd_pmac_sound_feature(chip, 1);
1352         if (chip->resume)
1353                 chip->resume(chip);
1354         /* enable CD sound input */
1355         if (chip->macio_base && chip->is_pbook_G3) {
1356                 out_8(chip->macio_base + 0x37, 3);
1357         } else if (chip->is_pbook_3400) {
1358                 in_8(chip->latch_base + 0x190);
1359         }
1360
1361         snd_pmac_pcm_set_format(chip);
1362
1363         if (chip->irq >= 0)
1364                 enable_irq(chip->irq);
1365         if (chip->tx_irq >= 0)
1366                 enable_irq(chip->tx_irq);
1367         if (chip->rx_irq >= 0)
1368                 enable_irq(chip->rx_irq);
1369
1370         return 0;
1371 }
1372
1373 /* the chip is stored statically by snd_pmac_register_sleep_notifier
1374  * because we can't have any private data for notify callback.
1375  */
1376 static pmac_t *sleeping_pmac = NULL;
1377
1378 static int snd_pmac_sleep_notify(struct pmu_sleep_notifier *self, int when)
1379 {
1380         pmac_t *chip;
1381
1382         chip = sleeping_pmac;
1383         snd_runtime_check(chip, return 0);
1384
1385         switch (when) {
1386         case PBOOK_SLEEP_NOW:
1387                 snd_pmac_suspend(chip->card, PMSG_SUSPEND);
1388                 break;
1389         case PBOOK_WAKE:
1390                 snd_pmac_resume(chip->card);
1391                 break;
1392         }
1393         return PBOOK_SLEEP_OK;
1394 }
1395
1396 static struct pmu_sleep_notifier snd_pmac_sleep_notifier = {
1397         snd_pmac_sleep_notify, SLEEP_LEVEL_SOUND,
1398 };
1399
1400 static int __init snd_pmac_register_sleep_notifier(pmac_t *chip)
1401 {
1402         /* should be protected here.. */
1403         snd_assert(! sleeping_pmac, return -EBUSY);
1404         sleeping_pmac = chip;
1405         pmu_register_sleep_notifier(&snd_pmac_sleep_notifier);
1406         return 0;
1407 }
1408                                                     
1409 static int snd_pmac_unregister_sleep_notifier(pmac_t *chip)
1410 {
1411         /* should be protected here.. */
1412         snd_assert(sleeping_pmac == chip, return -ENODEV);
1413         pmu_unregister_sleep_notifier(&snd_pmac_sleep_notifier);
1414         sleeping_pmac = NULL;
1415         return 0;
1416 }
1417
1418 #endif /* CONFIG_PM */
1419