1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PMac DBDMA lowlevel functions
4 *
5 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
6 * code based on dmasound.c.
7 */
8
9
10 #include <linux/io.h>
11 #include <asm/irq.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/pci.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/of_address.h>
19 #include <linux/of_irq.h>
20 #include <sound/core.h>
21 #include "pmac.h"
22 #include <sound/pcm_params.h>
23 #include <asm/pmac_feature.h>
24
25
26 /* fixed frequency table for awacs, screamer, burgundy, DACA (44100 max) */
27 static const int awacs_freqs[8] = {
28 44100, 29400, 22050, 17640, 14700, 11025, 8820, 7350
29 };
30 /* fixed frequency table for tumbler */
31 static const int tumbler_freqs[1] = {
32 44100
33 };
34
35
36 /*
37 * we will allocate a single 'emergency' dbdma cmd block to use if the
38 * tx status comes up "DEAD". This happens on some PowerComputing Pmac
39 * clones, either owing to a bug in dbdma or some interaction between
40 * IDE and sound. However, this measure would deal with DEAD status if
41 * it appeared elsewhere.
42 */
43 static struct pmac_dbdma emergency_dbdma;
44 static int emergency_in_use;
45
46
47 /*
48 * allocate DBDMA command arrays
49 */
50 static int snd_pmac_dbdma_alloc(struct snd_pmac *chip, struct pmac_dbdma *rec, int size)
51 {
52 unsigned int rsize = sizeof(struct dbdma_cmd) * (size + 1);
53
54 rec->space = dma_alloc_coherent(&chip->pdev->dev, rsize,
55 &rec->dma_base, GFP_KERNEL);
56 if (rec->space == NULL)
57 return -ENOMEM;
58 rec->size = size;
59 memset(rec->space, 0, rsize);
60 rec->cmds = (void __iomem *)DBDMA_ALIGN(rec->space);
61 rec->addr = rec->dma_base + (unsigned long)((char *)rec->cmds - (char *)rec->space);
62
63 return 0;
64 }
65
66 static void snd_pmac_dbdma_free(struct snd_pmac *chip, struct pmac_dbdma *rec)
67 {
68 if (rec->space) {
69 unsigned int rsize = sizeof(struct dbdma_cmd) * (rec->size + 1);
70
71 dma_free_coherent(&chip->pdev->dev, rsize, rec->space, rec->dma_base);
72 }
73 }
74
75
76 /*
77 * pcm stuff
78 */
79
80 /*
81 * look up frequency table
82 */
83
84 unsigned int snd_pmac_rate_index(struct snd_pmac *chip, struct pmac_stream *rec, unsigned int rate)
85 {
86 int i, ok, found;
87
88 ok = rec->cur_freqs;
89 if (rate > chip->freq_table[0])
90 return 0;
91 found = 0;
92 for (i = 0; i < chip->num_freqs; i++, ok >>= 1) {
93 if (! (ok & 1)) continue;
94 found = i;
95 if (rate >= chip->freq_table[i])
96 break;
97 }
98 return found;
99 }
100
101 /*
102 * check whether another stream is active
103 */
104 static inline int another_stream(int stream)
105 {
106 return (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
107 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
108 }
109
110 /*
111 * get a stream of the opposite direction
112 */
113 static struct pmac_stream *snd_pmac_get_stream(struct snd_pmac *chip, int stream)
114 {
115 switch (stream) {
116 case SNDRV_PCM_STREAM_PLAYBACK:
117 return &chip->playback;
118 case SNDRV_PCM_STREAM_CAPTURE:
119 return &chip->capture;
120 default:
121 snd_BUG();
122 return NULL;
123 }
124 }
125
126 /*
127 * wait while run status is on
128 */
129 static inline void
130 snd_pmac_wait_ack(struct pmac_stream *rec)
131 {
132 int timeout = 50000;
133 while ((in_le32(&rec->dma->status) & RUN) && timeout-- > 0)
134 udelay(1);
135 }
136
137 /*
138 * set the format and rate to the chip.
139 * call the lowlevel function if defined (e.g. for AWACS).
140 */
141 static void snd_pmac_pcm_set_format(struct snd_pmac *chip)
142 {
143 /* set up frequency and format */
144 out_le32(&chip->awacs->control, chip->control_mask | (chip->rate_index << 8));
145 out_le32(&chip->awacs->byteswap, chip->format == SNDRV_PCM_FORMAT_S16_LE ? 1 : 0);
146 if (chip->set_format)
147 chip->set_format(chip);
148 }
149
150 /*
151 * stop the DMA transfer
152 */
153 static inline void snd_pmac_dma_stop(struct pmac_stream *rec)
154 {
155 out_le32(&rec->dma->control, (RUN|WAKE|FLUSH|PAUSE) << 16);
156 snd_pmac_wait_ack(rec);
157 }
158
159 /*
160 * set the command pointer address
161 */
162 static inline void snd_pmac_dma_set_command(struct pmac_stream *rec, struct pmac_dbdma *cmd)
163 {
164 out_le32(&rec->dma->cmdptr, cmd->addr);
165 }
166
167 /*
168 * start the DMA
169 */
170 static inline void snd_pmac_dma_run(struct pmac_stream *rec, int status)
171 {
172 out_le32(&rec->dma->control, status | (status << 16));
173 }
174
175
176 /*
177 * prepare playback/capture stream
178 */
179 static int snd_pmac_pcm_prepare(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs)
180 {
181 int i;
182 volatile struct dbdma_cmd __iomem *cp;
183 struct snd_pcm_runtime *runtime = subs->runtime;
184 int rate_index;
185 long offset;
186 struct pmac_stream *astr;
187
188 rec->dma_size = snd_pcm_lib_buffer_bytes(subs);
189 rec->period_size = snd_pcm_lib_period_bytes(subs);
190 rec->nperiods = rec->dma_size / rec->period_size;
191 rec->cur_period = 0;
192 rate_index = snd_pmac_rate_index(chip, rec, runtime->rate);
193
194 /* set up constraints */
195 astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
196 if (! astr)
197 return -EINVAL;
198 astr->cur_freqs = 1 << rate_index;
199 astr->cur_formats = 1 << runtime->format;
200 chip->rate_index = rate_index;
201 chip->format = runtime->format;
202
203 /* We really want to execute a DMA stop command, after the AWACS
204 * is initialized.
205 * For reasons I don't understand, it stops the hissing noise
206 * common to many PowerBook G3 systems and random noise otherwise
207 * captured on iBook2's about every third time. -ReneR
208 */
209 spin_lock_irq(&chip->reg_lock);
210 snd_pmac_dma_stop(rec);
211 chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
212 snd_pmac_dma_set_command(rec, &chip->extra_dma);
213 snd_pmac_dma_run(rec, RUN);
214 spin_unlock_irq(&chip->reg_lock);
215 mdelay(5);
216 spin_lock_irq(&chip->reg_lock);
217 /* continuous DMA memory type doesn't provide the physical address,
218 * so we need to resolve the address here...
219 */
220 offset = runtime->dma_addr;
221 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++) {
222 cp->phy_addr = cpu_to_le32(offset);
223 cp->req_count = cpu_to_le16(rec->period_size);
224 /*cp->res_count = cpu_to_le16(0);*/
225 cp->xfer_status = cpu_to_le16(0);
226 offset += rec->period_size;
227 }
228 /* make loop */
229 cp->command = cpu_to_le16(DBDMA_NOP | BR_ALWAYS);
230 cp->cmd_dep = cpu_to_le32(rec->cmd.addr);
231
232 snd_pmac_dma_stop(rec);
233 snd_pmac_dma_set_command(rec, &rec->cmd);
234 spin_unlock_irq(&chip->reg_lock);
235
236 return 0;
237 }
238
239
240 /*
241 * PCM trigger/stop
242 */
243 static int snd_pmac_pcm_trigger(struct snd_pmac *chip, struct pmac_stream *rec,
244 struct snd_pcm_substream *subs, int cmd)
245 {
246 volatile struct dbdma_cmd __iomem *cp;
247 int i, command;
248
249 switch (cmd) {
250 case SNDRV_PCM_TRIGGER_START:
251 case SNDRV_PCM_TRIGGER_RESUME:
252 if (rec->running)
253 return -EBUSY;
254 command = (subs->stream == SNDRV_PCM_STREAM_PLAYBACK ?
255 OUTPUT_MORE : INPUT_MORE) + INTR_ALWAYS;
256 spin_lock(&chip->reg_lock);
257 snd_pmac_beep_stop(chip);
258 snd_pmac_pcm_set_format(chip);
259 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
260 out_le16(&cp->command, command);
261 snd_pmac_dma_set_command(rec, &rec->cmd);
262 (void)in_le32(&rec->dma->status);
263 snd_pmac_dma_run(rec, RUN|WAKE);
264 rec->running = 1;
265 spin_unlock(&chip->reg_lock);
266 break;
267
268 case SNDRV_PCM_TRIGGER_STOP:
269 case SNDRV_PCM_TRIGGER_SUSPEND:
270 spin_lock(&chip->reg_lock);
271 rec->running = 0;
272 /*printk(KERN_DEBUG "stopped!!\n");*/
273 snd_pmac_dma_stop(rec);
274 for (i = 0, cp = rec->cmd.cmds; i < rec->nperiods; i++, cp++)
275 out_le16(&cp->command, DBDMA_STOP);
276 spin_unlock(&chip->reg_lock);
277 break;
278
279 default:
280 return -EINVAL;
281 }
282
283 return 0;
284 }
285
286 /*
287 * return the current pointer
288 */
289 inline
290 static snd_pcm_uframes_t snd_pmac_pcm_pointer(struct snd_pmac *chip,
291 struct pmac_stream *rec,
292 struct snd_pcm_substream *subs)
293 {
294 int count = 0;
295
296 #if 1 /* hmm.. how can we get the current dma pointer?? */
297 int stat;
298 volatile struct dbdma_cmd __iomem *cp = &rec->cmd.cmds[rec->cur_period];
299 stat = le16_to_cpu(cp->xfer_status);
300 if (stat & (ACTIVE|DEAD)) {
301 count = in_le16(&cp->res_count);
302 if (count)
303 count = rec->period_size - count;
304 }
305 #endif
306 count += rec->cur_period * rec->period_size;
307 /*printk(KERN_DEBUG "pointer=%d\n", count);*/
308 return bytes_to_frames(subs->runtime, count);
309 }
310
311 /*
312 * playback
313 */
314
315 static int snd_pmac_playback_prepare(struct snd_pcm_substream *subs)
316 {
317 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
318 return snd_pmac_pcm_prepare(chip, &chip->playback, subs);
319 }
320
321 static int snd_pmac_playback_trigger(struct snd_pcm_substream *subs,
322 int cmd)
323 {
324 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
325 return snd_pmac_pcm_trigger(chip, &chip->playback, subs, cmd);
326 }
327
328 static snd_pcm_uframes_t snd_pmac_playback_pointer(struct snd_pcm_substream *subs)
329 {
330 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
331 return snd_pmac_pcm_pointer(chip, &chip->playback, subs);
332 }
333
334
335 /*
336 * capture
337 */
338
339 static int snd_pmac_capture_prepare(struct snd_pcm_substream *subs)
340 {
341 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
342 return snd_pmac_pcm_prepare(chip, &chip->capture, subs);
343 }
344
345 static int snd_pmac_capture_trigger(struct snd_pcm_substream *subs,
346 int cmd)
347 {
348 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
349 return snd_pmac_pcm_trigger(chip, &chip->capture, subs, cmd);
350 }
351
352 static snd_pcm_uframes_t snd_pmac_capture_pointer(struct snd_pcm_substream *subs)
353 {
354 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
355 return snd_pmac_pcm_pointer(chip, &chip->capture, subs);
356 }
357
358
359 /*
360 * Handle DEAD DMA transfers:
361 * if the TX status comes up "DEAD" - reported on some Power Computing machines
362 * we need to re-start the dbdma - but from a different physical start address
363 * and with a different transfer length. It would get very messy to do this
364 * with the normal dbdma_cmd blocks - we would have to re-write the buffer start
365 * addresses each time. So, we will keep a single dbdma_cmd block which can be
366 * fiddled with.
367 * When DEAD status is first reported the content of the faulted dbdma block is
368 * copied into the emergency buffer and we note that the buffer is in use.
369 * we then bump the start physical address by the amount that was successfully
370 * output before it died.
371 * On any subsequent DEAD result we just do the bump-ups (we know that we are
372 * already using the emergency dbdma_cmd).
373 * CHECK: this just tries to "do it". It is possible that we should abandon
374 * xfers when the number of residual bytes gets below a certain value - I can
375 * see that this might cause a loop-forever if a too small transfer causes
376 * DEAD status. However this is a TODO for now - we'll see what gets reported.
377 * When we get a successful transfer result with the emergency buffer we just
378 * pretend that it completed using the original dmdma_cmd and carry on. The
379 * 'next_cmd' field will already point back to the original loop of blocks.
380 */
381 static inline void snd_pmac_pcm_dead_xfer(struct pmac_stream *rec,
382 volatile struct dbdma_cmd __iomem *cp)
383 {
384 unsigned short req, res ;
385 unsigned int phy ;
386
387 /* printk(KERN_WARNING "snd-powermac: DMA died - patching it up!\n"); */
388
389 /* to clear DEAD status we must first clear RUN
390 set it to quiescent to be on the safe side */
391 (void)in_le32(&rec->dma->status);
392 out_le32(&rec->dma->control, (RUN|PAUSE|FLUSH|WAKE) << 16);
393
394 if (!emergency_in_use) { /* new problem */
395 memcpy((void *)emergency_dbdma.cmds, (void *)cp,
396 sizeof(struct dbdma_cmd));
397 emergency_in_use = 1;
398 cp->xfer_status = cpu_to_le16(0);
399 cp->req_count = cpu_to_le16(rec->period_size);
400 cp = emergency_dbdma.cmds;
401 }
402
403 /* now bump the values to reflect the amount
404 we haven't yet shifted */
405 req = le16_to_cpu(cp->req_count);
406 res = le16_to_cpu(cp->res_count);
407 phy = le32_to_cpu(cp->phy_addr);
408 phy += (req - res);
409 cp->req_count = cpu_to_le16(res);
410 cp->res_count = cpu_to_le16(0);
411 cp->xfer_status = cpu_to_le16(0);
412 cp->phy_addr = cpu_to_le32(phy);
413
414 cp->cmd_dep = cpu_to_le32(rec->cmd.addr
415 + sizeof(struct dbdma_cmd)*((rec->cur_period+1)%rec->nperiods));
416
417 cp->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS | INTR_ALWAYS);
418
419 /* point at our patched up command block */
420 out_le32(&rec->dma->cmdptr, emergency_dbdma.addr);
421
422 /* we must re-start the controller */
423 (void)in_le32(&rec->dma->status);
424 /* should complete clearing the DEAD status */
425 out_le32(&rec->dma->control, ((RUN|WAKE) << 16) + (RUN|WAKE));
426 }
427
428 /*
429 * update playback/capture pointer from interrupts
430 */
431 static void snd_pmac_pcm_update(struct snd_pmac *chip, struct pmac_stream *rec)
432 {
433 volatile struct dbdma_cmd __iomem *cp;
434 int c;
435 int stat;
436
437 spin_lock(&chip->reg_lock);
438 if (rec->running) {
439 for (c = 0; c < rec->nperiods; c++) { /* at most all fragments */
440
441 if (emergency_in_use) /* already using DEAD xfer? */
442 cp = emergency_dbdma.cmds;
443 else
444 cp = &rec->cmd.cmds[rec->cur_period];
445
446 stat = le16_to_cpu(cp->xfer_status);
447
448 if (stat & DEAD) {
449 snd_pmac_pcm_dead_xfer(rec, cp);
450 break; /* this block is still going */
451 }
452
453 if (emergency_in_use)
454 emergency_in_use = 0 ; /* done that */
455
456 if (! (stat & ACTIVE))
457 break;
458
459 /*printk(KERN_DEBUG "update frag %d\n", rec->cur_period);*/
460 cp->xfer_status = cpu_to_le16(0);
461 cp->req_count = cpu_to_le16(rec->period_size);
462 /*cp->res_count = cpu_to_le16(0);*/
463 rec->cur_period++;
464 if (rec->cur_period >= rec->nperiods) {
465 rec->cur_period = 0;
466 }
467
468 spin_unlock(&chip->reg_lock);
469 snd_pcm_period_elapsed(rec->substream);
470 spin_lock(&chip->reg_lock);
471 }
472 }
473 spin_unlock(&chip->reg_lock);
474 }
475
476
477 /*
478 * hw info
479 */
480
481 static const struct snd_pcm_hardware snd_pmac_playback =
482 {
483 .info = (SNDRV_PCM_INFO_INTERLEAVED |
484 SNDRV_PCM_INFO_MMAP |
485 SNDRV_PCM_INFO_MMAP_VALID |
486 SNDRV_PCM_INFO_RESUME),
487 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
488 .rates = SNDRV_PCM_RATE_8000_44100,
489 .rate_min = 7350,
490 .rate_max = 44100,
491 .channels_min = 2,
492 .channels_max = 2,
493 .buffer_bytes_max = 131072,
494 .period_bytes_min = 256,
495 .period_bytes_max = 16384,
496 .periods_min = 3,
497 .periods_max = PMAC_MAX_FRAGS,
498 };
499
500 static const struct snd_pcm_hardware snd_pmac_capture =
501 {
502 .info = (SNDRV_PCM_INFO_INTERLEAVED |
503 SNDRV_PCM_INFO_MMAP |
504 SNDRV_PCM_INFO_MMAP_VALID |
505 SNDRV_PCM_INFO_RESUME),
506 .formats = SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_S16_LE,
507 .rates = SNDRV_PCM_RATE_8000_44100,
508 .rate_min = 7350,
509 .rate_max = 44100,
510 .channels_min = 2,
511 .channels_max = 2,
512 .buffer_bytes_max = 131072,
513 .period_bytes_min = 256,
514 .period_bytes_max = 16384,
515 .periods_min = 3,
516 .periods_max = PMAC_MAX_FRAGS,
517 };
518
519
520 #if 0 // NYI
521 static int snd_pmac_hw_rule_rate(struct snd_pcm_hw_params *params,
522 struct snd_pcm_hw_rule *rule)
523 {
524 struct snd_pmac *chip = rule->private;
525 struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
526 int i, freq_table[8], num_freqs;
527
528 if (! rec)
529 return -EINVAL;
530 num_freqs = 0;
531 for (i = chip->num_freqs - 1; i >= 0; i--) {
532 if (rec->cur_freqs & (1 << i))
533 freq_table[num_freqs++] = chip->freq_table[i];
534 }
535
536 return snd_interval_list(hw_param_interval(params, rule->var),
537 num_freqs, freq_table, 0);
538 }
539
540 static int snd_pmac_hw_rule_format(struct snd_pcm_hw_params *params,
541 struct snd_pcm_hw_rule *rule)
542 {
543 struct snd_pmac *chip = rule->private;
544 struct pmac_stream *rec = snd_pmac_get_stream(chip, rule->deps[0]);
545
546 if (! rec)
547 return -EINVAL;
548 return snd_mask_refine_set(hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT),
549 rec->cur_formats);
550 }
551 #endif // NYI
552
553 static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec,
554 struct snd_pcm_substream *subs)
555 {
556 struct snd_pcm_runtime *runtime = subs->runtime;
557 int i;
558
559 /* look up frequency table and fill bit mask */
560 runtime->hw.rates = 0;
561 for (i = 0; i < chip->num_freqs; i++)
562 if (chip->freqs_ok & (1 << i))
563 runtime->hw.rates |=
564 snd_pcm_rate_to_rate_bit(chip->freq_table[i]);
565
566 /* check for minimum and maximum rates */
567 for (i = 0; i < chip->num_freqs; i++) {
568 if (chip->freqs_ok & (1 << i)) {
569 runtime->hw.rate_max = chip->freq_table[i];
570 break;
571 }
572 }
573 for (i = chip->num_freqs - 1; i >= 0; i--) {
574 if (chip->freqs_ok & (1 << i)) {
575 runtime->hw.rate_min = chip->freq_table[i];
576 break;
577 }
578 }
579 runtime->hw.formats = chip->formats_ok;
580 if (chip->can_capture) {
581 if (! chip->can_duplex)
582 runtime->hw.info |= SNDRV_PCM_INFO_HALF_DUPLEX;
583 runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
584 }
585 runtime->private_data = rec;
586 rec->substream = subs;
587
588 #if 0 /* FIXME: still under development.. */
589 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
590 snd_pmac_hw_rule_rate, chip, rec->stream, -1);
591 snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
592 snd_pmac_hw_rule_format, chip, rec->stream, -1);
593 #endif
594
595 runtime->hw.periods_max = rec->cmd.size - 1;
596
597 /* constraints to fix choppy sound */
598 snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
599 return 0;
600 }
601
602 static int snd_pmac_pcm_close(struct snd_pmac *chip, struct pmac_stream *rec,
603 struct snd_pcm_substream *subs)
604 {
605 struct pmac_stream *astr;
606
607 snd_pmac_dma_stop(rec);
608
609 astr = snd_pmac_get_stream(chip, another_stream(rec->stream));
610 if (! astr)
611 return -EINVAL;
612
613 /* reset constraints */
614 astr->cur_freqs = chip->freqs_ok;
615 astr->cur_formats = chip->formats_ok;
616
617 return 0;
618 }
619
620 static int snd_pmac_playback_open(struct snd_pcm_substream *subs)
621 {
622 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
623
624 subs->runtime->hw = snd_pmac_playback;
625 return snd_pmac_pcm_open(chip, &chip->playback, subs);
626 }
627
628 static int snd_pmac_capture_open(struct snd_pcm_substream *subs)
629 {
630 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
631
632 subs->runtime->hw = snd_pmac_capture;
633 return snd_pmac_pcm_open(chip, &chip->capture, subs);
634 }
635
636 static int snd_pmac_playback_close(struct snd_pcm_substream *subs)
637 {
638 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
639
640 return snd_pmac_pcm_close(chip, &chip->playback, subs);
641 }
642
643 static int snd_pmac_capture_close(struct snd_pcm_substream *subs)
644 {
645 struct snd_pmac *chip = snd_pcm_substream_chip(subs);
646
647 return snd_pmac_pcm_close(chip, &chip->capture, subs);
648 }
649
650 /*
651 */
652
653 static const struct snd_pcm_ops snd_pmac_playback_ops = {
654 .open = snd_pmac_playback_open,
655 .close = snd_pmac_playback_close,
656 .prepare = snd_pmac_playback_prepare,
657 .trigger = snd_pmac_playback_trigger,
658 .pointer = snd_pmac_playback_pointer,
659 };
660
661 static const struct snd_pcm_ops snd_pmac_capture_ops = {
662 .open = snd_pmac_capture_open,
663 .close = snd_pmac_capture_close,
664 .prepare = snd_pmac_capture_prepare,
665 .trigger = snd_pmac_capture_trigger,
666 .pointer = snd_pmac_capture_pointer,
667 };
668
669 int snd_pmac_pcm_new(struct snd_pmac *chip)
670 {
671 struct snd_pcm *pcm;
672 int err;
673 int num_captures = 1;
674
675 if (! chip->can_capture)
676 num_captures = 0;
677 err = snd_pcm_new(chip->card, chip->card->driver, 0, 1, num_captures, &pcm);
678 if (err < 0)
679 return err;
680
681 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_pmac_playback_ops);
682 if (chip->can_capture)
683 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_pmac_capture_ops);
684
685 pcm->private_data = chip;
686 pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
687 strcpy(pcm->name, chip->card->shortname);
688 chip->pcm = pcm;
689
690 chip->formats_ok = SNDRV_PCM_FMTBIT_S16_BE;
691 if (chip->can_byte_swap)
692 chip->formats_ok |= SNDRV_PCM_FMTBIT_S16_LE;
693
694 chip->playback.cur_formats = chip->formats_ok;
695 chip->capture.cur_formats = chip->formats_ok;
696 chip->playback.cur_freqs = chip->freqs_ok;
697 chip->capture.cur_freqs = chip->freqs_ok;
698
699 /* preallocate 64k buffer */
700 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
701 &chip->pdev->dev,
702 64 * 1024, 64 * 1024);
703
704 return 0;
705 }
706
707
708 static void snd_pmac_dbdma_reset(struct snd_pmac *chip)
709 {
710 out_le32(&chip->playback.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
711 snd_pmac_wait_ack(&chip->playback);
712 out_le32(&chip->capture.dma->control, (RUN|PAUSE|FLUSH|WAKE|DEAD) << 16);
713 snd_pmac_wait_ack(&chip->capture);
714 }
715
716
717 /*
718 * handling beep
719 */
720 void snd_pmac_beep_dma_start(struct snd_pmac *chip, int bytes, unsigned long addr, int speed)
721 {
722 struct pmac_stream *rec = &chip->playback;
723
724 snd_pmac_dma_stop(rec);
725 chip->extra_dma.cmds->req_count = cpu_to_le16(bytes);
726 chip->extra_dma.cmds->xfer_status = cpu_to_le16(0);
727 chip->extra_dma.cmds->cmd_dep = cpu_to_le32(chip->extra_dma.addr);
728 chip->extra_dma.cmds->phy_addr = cpu_to_le32(addr);
729 chip->extra_dma.cmds->command = cpu_to_le16(OUTPUT_MORE | BR_ALWAYS);
730 out_le32(&chip->awacs->control,
731 (in_le32(&chip->awacs->control) & ~0x1f00)
732 | (speed << 8));
733 out_le32(&chip->awacs->byteswap, 0);
734 snd_pmac_dma_set_command(rec, &chip->extra_dma);
735 snd_pmac_dma_run(rec, RUN);
736 }
737
738 void snd_pmac_beep_dma_stop(struct snd_pmac *chip)
739 {
740 snd_pmac_dma_stop(&chip->playback);
741 chip->extra_dma.cmds->command = cpu_to_le16(DBDMA_STOP);
742 snd_pmac_pcm_set_format(chip); /* reset format */
743 }
744
745
746 /*
747 * interrupt handlers
748 */
749 static irqreturn_t
750 snd_pmac_tx_intr(int irq, void *devid)
751 {
752 struct snd_pmac *chip = devid;
753 snd_pmac_pcm_update(chip, &chip->playback);
754 return IRQ_HANDLED;
755 }
756
757
758 static irqreturn_t
759 snd_pmac_rx_intr(int irq, void *devid)
760 {
761 struct snd_pmac *chip = devid;
762 snd_pmac_pcm_update(chip, &chip->capture);
763 return IRQ_HANDLED;
764 }
765
766
767 static irqreturn_t
768 snd_pmac_ctrl_intr(int irq, void *devid)
769 {
770 struct snd_pmac *chip = devid;
771 int ctrl = in_le32(&chip->awacs->control);
772
773 /*printk(KERN_DEBUG "pmac: control interrupt.. 0x%x\n", ctrl);*/
774 if (ctrl & MASK_PORTCHG) {
775 /* do something when headphone is plugged/unplugged? */
776 if (chip->update_automute)
777 chip->update_automute(chip, 1);
778 }
779 if (ctrl & MASK_CNTLERR) {
780 int err = (in_le32(&chip->awacs->codec_stat) & MASK_ERRCODE) >> 16;
781 if (err && chip->model <= PMAC_SCREAMER)
782 snd_printk(KERN_DEBUG "error %x\n", err);
783 }
784 /* Writing 1s to the CNTLERR and PORTCHG bits clears them... */
785 out_le32(&chip->awacs->control, ctrl);
786 return IRQ_HANDLED;
787 }
788
789
790 /*
791 * a wrapper to feature call for compatibility
792 */
793 static void snd_pmac_sound_feature(struct snd_pmac *chip, int enable)
794 {
795 if (ppc_md.feature_call)
796 ppc_md.feature_call(PMAC_FTR_SOUND_CHIP_ENABLE, chip->node, 0, enable);
797 }
798
799 /*
800 * release resources
801 */
802
803 static int snd_pmac_free(struct snd_pmac *chip)
804 {
805 /* stop sounds */
806 if (chip->initialized) {
807 snd_pmac_dbdma_reset(chip);
808 /* disable interrupts from awacs interface */
809 out_le32(&chip->awacs->control, in_le32(&chip->awacs->control) & 0xfff);
810 }
811
812 if (chip->node)
813 snd_pmac_sound_feature(chip, 0);
814
815 /* clean up mixer if any */
816 if (chip->mixer_free)
817 chip->mixer_free(chip);
818
819 snd_pmac_detach_beep(chip);
820
821 /* release resources */
822 if (chip->irq >= 0)
823 free_irq(chip->irq, (void*)chip);
824 if (chip->tx_irq >= 0)
825 free_irq(chip->tx_irq, (void*)chip);
826 if (chip->rx_irq >= 0)
827 free_irq(chip->rx_irq, (void*)chip);
828 snd_pmac_dbdma_free(chip, &chip->playback.cmd);
829 snd_pmac_dbdma_free(chip, &chip->capture.cmd);
830 snd_pmac_dbdma_free(chip, &chip->extra_dma);
831 snd_pmac_dbdma_free(chip, &emergency_dbdma);
832 iounmap(chip->macio_base);
833 iounmap(chip->latch_base);
834 iounmap(chip->awacs);
835 iounmap(chip->playback.dma);
836 iounmap(chip->capture.dma);
837
838 if (chip->node) {
839 int i;
840 for (i = 0; i < 3; i++) {
841 if (chip->requested & (1 << i))
842 release_mem_region(chip->rsrc[i].start,
843 resource_size(&chip->rsrc[i]));
844 }
845 }
846
847 pci_dev_put(chip->pdev);
848 of_node_put(chip->node);
849 kfree(chip);
850 return 0;
851 }
852
853
854 /*
855 * free the device
856 */
857 static int snd_pmac_dev_free(struct snd_device *device)
858 {
859 struct snd_pmac *chip = device->device_data;
860 return snd_pmac_free(chip);
861 }
862
863
864 /*
865 * check the machine support byteswap (little-endian)
866 */
867
868 static void detect_byte_swap(struct snd_pmac *chip)
869 {
870 struct device_node *mio;
871
872 /* if seems that Keylargo can't byte-swap */
873 for (mio = chip->node->parent; mio; mio = mio->parent) {
874 if (of_node_name_eq(mio, "mac-io")) {
875 if (of_device_is_compatible(mio, "Keylargo"))
876 chip->can_byte_swap = 0;
877 break;
878 }
879 }
880
881 /* it seems the Pismo & iBook can't byte-swap in hardware. */
882 if (of_machine_is_compatible("PowerBook3,1") ||
883 of_machine_is_compatible("PowerBook2,1"))
884 chip->can_byte_swap = 0 ;
885
886 if (of_machine_is_compatible("PowerBook2,1"))
887 chip->can_duplex = 0;
888 }
889
890
891 /*
892 * detect a sound chip
893 */
894 static int snd_pmac_detect(struct snd_pmac *chip)
895 {
896 struct device_node *sound;
897 struct device_node *dn;
898 const unsigned int *prop;
899 unsigned int l;
900 struct macio_chip* macio;
901
902 if (!machine_is(powermac))
903 return -ENODEV;
904
905 chip->subframe = 0;
906 chip->revision = 0;
907 chip->freqs_ok = 0xff; /* all ok */
908 chip->model = PMAC_AWACS;
909 chip->can_byte_swap = 1;
910 chip->can_duplex = 1;
911 chip->can_capture = 1;
912 chip->num_freqs = ARRAY_SIZE(awacs_freqs);
913 chip->freq_table = awacs_freqs;
914 chip->pdev = NULL;
915
916 chip->control_mask = MASK_IEPC | MASK_IEE | 0x11; /* default */
917
918 /* check machine type */
919 if (of_machine_is_compatible("AAPL,3400/2400")
920 || of_machine_is_compatible("AAPL,3500"))
921 chip->is_pbook_3400 = 1;
922 else if (of_machine_is_compatible("PowerBook1,1")
923 || of_machine_is_compatible("AAPL,PowerBook1998"))
924 chip->is_pbook_G3 = 1;
925 chip->node = of_find_node_by_name(NULL, "awacs");
926 sound = of_node_get(chip->node);
927
928 /*
929 * powermac G3 models have a node called "davbus"
930 * with a child called "sound".
931 */
932 if (!chip->node)
933 chip->node = of_find_node_by_name(NULL, "davbus");
934 /*
935 * if we didn't find a davbus device, try 'i2s-a' since
936 * this seems to be what iBooks have
937 */
938 if (! chip->node) {
939 chip->node = of_find_node_by_name(NULL, "i2s-a");
940 if (chip->node && chip->node->parent &&
941 chip->node->parent->parent) {
942 if (of_device_is_compatible(chip->node->parent->parent,
943 "K2-Keylargo"))
944 chip->is_k2 = 1;
945 }
946 }
947 if (! chip->node)
948 return -ENODEV;
949
950 if (!sound) {
951 for_each_node_by_name(sound, "sound")
952 if (sound->parent == chip->node)
953 break;
954 }
955 if (! sound) {
956 of_node_put(chip->node);
957 chip->node = NULL;
958 return -ENODEV;
959 }
960 prop = of_get_property(sound, "sub-frame", NULL);
961 if (prop && *prop < 16)
962 chip->subframe = *prop;
963 prop = of_get_property(sound, "layout-id", NULL);
964 if (prop) {
965 /* partly deprecate snd-powermac, for those machines
966 * that have a layout-id property for now */
967 printk(KERN_INFO "snd-powermac no longer handles any "
968 "machines with a layout-id property "
969 "in the device-tree, use snd-aoa.\n");
970 of_node_put(sound);
971 of_node_put(chip->node);
972 chip->node = NULL;
973 return -ENODEV;
974 }
975 /* This should be verified on older screamers */
976 if (of_device_is_compatible(sound, "screamer")) {
977 chip->model = PMAC_SCREAMER;
978 // chip->can_byte_swap = 0; /* FIXME: check this */
979 }
980 if (of_device_is_compatible(sound, "burgundy")) {
981 chip->model = PMAC_BURGUNDY;
982 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
983 }
984 if (of_device_is_compatible(sound, "daca")) {
985 chip->model = PMAC_DACA;
986 chip->can_capture = 0; /* no capture */
987 chip->can_duplex = 0;
988 // chip->can_byte_swap = 0; /* FIXME: check this */
989 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
990 }
991 if (of_device_is_compatible(sound, "tumbler")) {
992 chip->model = PMAC_TUMBLER;
993 chip->can_capture = of_machine_is_compatible("PowerMac4,2")
994 || of_machine_is_compatible("PowerBook3,2")
995 || of_machine_is_compatible("PowerBook3,3")
996 || of_machine_is_compatible("PowerBook4,1")
997 || of_machine_is_compatible("PowerBook4,2")
998 || of_machine_is_compatible("PowerBook4,3");
999 chip->can_duplex = 0;
1000 // chip->can_byte_swap = 0; /* FIXME: check this */
1001 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1002 chip->freq_table = tumbler_freqs;
1003 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1004 }
1005 if (of_device_is_compatible(sound, "snapper")) {
1006 chip->model = PMAC_SNAPPER;
1007 // chip->can_byte_swap = 0; /* FIXME: check this */
1008 chip->num_freqs = ARRAY_SIZE(tumbler_freqs);
1009 chip->freq_table = tumbler_freqs;
1010 chip->control_mask = MASK_IEPC | 0x11; /* disable IEE */
1011 }
1012 prop = of_get_property(sound, "device-id", NULL);
1013 if (prop)
1014 chip->device_id = *prop;
1015 dn = of_find_node_by_name(NULL, "perch");
1016 chip->has_iic = (dn != NULL);
1017 of_node_put(dn);
1018
1019 /* We need the PCI device for DMA allocations, let's use a crude method
1020 * for now ...
1021 */
1022 macio = macio_find(chip->node, macio_unknown);
1023 if (macio == NULL)
1024 printk(KERN_WARNING "snd-powermac: can't locate macio !\n");
1025 else {
1026 struct pci_dev *pdev = NULL;
1027
1028 for_each_pci_dev(pdev) {
1029 struct device_node *np = pci_device_to_OF_node(pdev);
1030 if (np && np == macio->of_node) {
1031 chip->pdev = pdev;
1032 break;
1033 }
1034 }
1035 }
1036 if (chip->pdev == NULL)
1037 printk(KERN_WARNING "snd-powermac: can't locate macio PCI"
1038 " device !\n");
1039
1040 detect_byte_swap(chip);
1041
1042 /* look for a property saying what sample rates
1043 are available */
1044 prop = of_get_property(sound, "sample-rates", &l);
1045 if (! prop)
1046 prop = of_get_property(sound, "output-frame-rates", &l);
1047 if (prop) {
1048 int i;
1049 chip->freqs_ok = 0;
1050 for (l /= sizeof(int); l > 0; --l) {
1051 unsigned int r = *prop++;
1052 /* Apple 'Fixed' format */
1053 if (r >= 0x10000)
1054 r >>= 16;
1055 for (i = 0; i < chip->num_freqs; ++i) {
1056 if (r == chip->freq_table[i]) {
1057 chip->freqs_ok |= (1 << i);
1058 break;
1059 }
1060 }
1061 }
1062 } else {
1063 /* assume only 44.1khz */
1064 chip->freqs_ok = 1;
1065 }
1066
1067 of_node_put(sound);
1068 return 0;
1069 }
1070
1071 #ifdef PMAC_SUPPORT_AUTOMUTE
1072 /*
1073 * auto-mute
1074 */
1075 static int pmac_auto_mute_get(struct snd_kcontrol *kcontrol,
1076 struct snd_ctl_elem_value *ucontrol)
1077 {
1078 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1079 ucontrol->value.integer.value[0] = chip->auto_mute;
1080 return 0;
1081 }
1082
1083 static int pmac_auto_mute_put(struct snd_kcontrol *kcontrol,
1084 struct snd_ctl_elem_value *ucontrol)
1085 {
1086 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1087 if (ucontrol->value.integer.value[0] != chip->auto_mute) {
1088 chip->auto_mute = !!ucontrol->value.integer.value[0];
1089 if (chip->update_automute)
1090 chip->update_automute(chip, 1);
1091 return 1;
1092 }
1093 return 0;
1094 }
1095
1096 static int pmac_hp_detect_get(struct snd_kcontrol *kcontrol,
1097 struct snd_ctl_elem_value *ucontrol)
1098 {
1099 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
1100 if (chip->detect_headphone)
1101 ucontrol->value.integer.value[0] = chip->detect_headphone(chip);
1102 else
1103 ucontrol->value.integer.value[0] = 0;
1104 return 0;
1105 }
1106
1107 static const struct snd_kcontrol_new auto_mute_controls[] = {
1108 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1109 .name = "Auto Mute Switch",
1110 .info = snd_pmac_boolean_mono_info,
1111 .get = pmac_auto_mute_get,
1112 .put = pmac_auto_mute_put,
1113 },
1114 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1115 .name = "Headphone Detection",
1116 .access = SNDRV_CTL_ELEM_ACCESS_READ,
1117 .info = snd_pmac_boolean_mono_info,
1118 .get = pmac_hp_detect_get,
1119 },
1120 };
1121
1122 int snd_pmac_add_automute(struct snd_pmac *chip)
1123 {
1124 int err;
1125 chip->auto_mute = 1;
1126 err = snd_ctl_add(chip->card, snd_ctl_new1(&auto_mute_controls[0], chip));
1127 if (err < 0) {
1128 printk(KERN_ERR "snd-powermac: Failed to add automute control\n");
1129 return err;
1130 }
1131 chip->hp_detect_ctl = snd_ctl_new1(&auto_mute_controls[1], chip);
1132 return snd_ctl_add(chip->card, chip->hp_detect_ctl);
1133 }
1134 #endif /* PMAC_SUPPORT_AUTOMUTE */
1135
1136 /*
1137 * create and detect a pmac chip record
1138 */
1139 int snd_pmac_new(struct snd_card *card, struct snd_pmac **chip_return)
1140 {
1141 struct snd_pmac *chip;
1142 struct device_node *np;
1143 int i, err;
1144 unsigned int irq;
1145 unsigned long ctrl_addr, txdma_addr, rxdma_addr;
1146 static const struct snd_device_ops ops = {
1147 .dev_free = snd_pmac_dev_free,
1148 };
1149
1150 *chip_return = NULL;
1151
1152 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1153 if (chip == NULL)
1154 return -ENOMEM;
1155 chip->card = card;
1156
1157 spin_lock_init(&chip->reg_lock);
1158 chip->irq = chip->tx_irq = chip->rx_irq = -1;
1159
1160 chip->playback.stream = SNDRV_PCM_STREAM_PLAYBACK;
1161 chip->capture.stream = SNDRV_PCM_STREAM_CAPTURE;
1162
1163 err = snd_pmac_detect(chip);
1164 if (err < 0)
1165 goto __error;
1166
1167 if (snd_pmac_dbdma_alloc(chip, &chip->playback.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1168 snd_pmac_dbdma_alloc(chip, &chip->capture.cmd, PMAC_MAX_FRAGS + 1) < 0 ||
1169 snd_pmac_dbdma_alloc(chip, &chip->extra_dma, 2) < 0 ||
1170 snd_pmac_dbdma_alloc(chip, &emergency_dbdma, 2) < 0) {
1171 err = -ENOMEM;
1172 goto __error;
1173 }
1174
1175 np = chip->node;
1176 chip->requested = 0;
1177 if (chip->is_k2) {
1178 static const char * const rnames[] = {
1179 "Sound Control", "Sound DMA" };
1180 for (i = 0; i < 2; i ++) {
1181 if (of_address_to_resource(np->parent, i,
1182 &chip->rsrc[i])) {
1183 printk(KERN_ERR "snd: can't translate rsrc "
1184 " %d (%s)\n", i, rnames[i]);
1185 err = -ENODEV;
1186 goto __error;
1187 }
1188 if (request_mem_region(chip->rsrc[i].start,
1189 resource_size(&chip->rsrc[i]),
1190 rnames[i]) == NULL) {
1191 printk(KERN_ERR "snd: can't request rsrc "
1192 " %d (%s: %pR)\n",
1193 i, rnames[i], &chip->rsrc[i]);
1194 err = -ENODEV;
1195 goto __error;
1196 }
1197 chip->requested |= (1 << i);
1198 }
1199 ctrl_addr = chip->rsrc[0].start;
1200 txdma_addr = chip->rsrc[1].start;
1201 rxdma_addr = txdma_addr + 0x100;
1202 } else {
1203 static const char * const rnames[] = {
1204 "Sound Control", "Sound Tx DMA", "Sound Rx DMA" };
1205 for (i = 0; i < 3; i ++) {
1206 if (of_address_to_resource(np, i,
1207 &chip->rsrc[i])) {
1208 printk(KERN_ERR "snd: can't translate rsrc "
1209 " %d (%s)\n", i, rnames[i]);
1210 err = -ENODEV;
1211 goto __error;
1212 }
1213 if (request_mem_region(chip->rsrc[i].start,
1214 resource_size(&chip->rsrc[i]),
1215 rnames[i]) == NULL) {
1216 printk(KERN_ERR "snd: can't request rsrc "
1217 " %d (%s: %pR)\n",
1218 i, rnames[i], &chip->rsrc[i]);
1219 err = -ENODEV;
1220 goto __error;
1221 }
1222 chip->requested |= (1 << i);
1223 }
1224 ctrl_addr = chip->rsrc[0].start;
1225 txdma_addr = chip->rsrc[1].start;
1226 rxdma_addr = chip->rsrc[2].start;
1227 }
1228
1229 chip->awacs = ioremap(ctrl_addr, 0x1000);
1230 chip->playback.dma = ioremap(txdma_addr, 0x100);
1231 chip->capture.dma = ioremap(rxdma_addr, 0x100);
1232 if (chip->model <= PMAC_BURGUNDY) {
1233 irq = irq_of_parse_and_map(np, 0);
1234 if (request_irq(irq, snd_pmac_ctrl_intr, 0,
1235 "PMac", (void*)chip)) {
1236 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n",
1237 irq);
1238 err = -EBUSY;
1239 goto __error;
1240 }
1241 chip->irq = irq;
1242 }
1243 irq = irq_of_parse_and_map(np, 1);
1244 if (request_irq(irq, snd_pmac_tx_intr, 0, "PMac Output", (void*)chip)){
1245 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1246 err = -EBUSY;
1247 goto __error;
1248 }
1249 chip->tx_irq = irq;
1250 irq = irq_of_parse_and_map(np, 2);
1251 if (request_irq(irq, snd_pmac_rx_intr, 0, "PMac Input", (void*)chip)) {
1252 snd_printk(KERN_ERR "pmac: unable to grab IRQ %d\n", irq);
1253 err = -EBUSY;
1254 goto __error;
1255 }
1256 chip->rx_irq = irq;
1257
1258 snd_pmac_sound_feature(chip, 1);
1259
1260 /* reset & enable interrupts */
1261 if (chip->model <= PMAC_BURGUNDY)
1262 out_le32(&chip->awacs->control, chip->control_mask);
1263
1264 /* Powerbooks have odd ways of enabling inputs such as
1265 an expansion-bay CD or sound from an internal modem
1266 or a PC-card modem. */
1267 if (chip->is_pbook_3400) {
1268 /* Enable CD and PC-card sound inputs. */
1269 /* This is done by reading from address
1270 * f301a000, + 0x10 to enable the expansion-bay
1271 * CD sound input, + 0x80 to enable the PC-card
1272 * sound input. The 0x100 enables the SCSI bus
1273 * terminator power.
1274 */
1275 chip->latch_base = ioremap (0xf301a000, 0x1000);
1276 in_8(chip->latch_base + 0x190);
1277 } else if (chip->is_pbook_G3) {
1278 struct device_node* mio;
1279 for (mio = chip->node->parent; mio; mio = mio->parent) {
1280 if (of_node_name_eq(mio, "mac-io")) {
1281 struct resource r;
1282 if (of_address_to_resource(mio, 0, &r) == 0)
1283 chip->macio_base =
1284 ioremap(r.start, 0x40);
1285 break;
1286 }
1287 }
1288 /* Enable CD sound input. */
1289 /* The relevant bits for writing to this byte are 0x8f.
1290 * I haven't found out what the 0x80 bit does.
1291 * For the 0xf bits, writing 3 or 7 enables the CD
1292 * input, any other value disables it. Values
1293 * 1, 3, 5, 7 enable the microphone. Values 0, 2,
1294 * 4, 6, 8 - f enable the input from the modem.
1295 */
1296 if (chip->macio_base)
1297 out_8(chip->macio_base + 0x37, 3);
1298 }
1299
1300 /* Reset dbdma channels */
1301 snd_pmac_dbdma_reset(chip);
1302
1303 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
1304 if (err < 0)
1305 goto __error;
1306
1307 *chip_return = chip;
1308 return 0;
1309
1310 __error:
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 void snd_pmac_suspend(struct snd_pmac *chip)
1327 {
1328 unsigned long flags;
1329
1330 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
1331 if (chip->suspend)
1332 chip->suspend(chip);
1333 spin_lock_irqsave(&chip->reg_lock, flags);
1334 snd_pmac_beep_stop(chip);
1335 spin_unlock_irqrestore(&chip->reg_lock, flags);
1336 if (chip->irq >= 0)
1337 disable_irq(chip->irq);
1338 if (chip->tx_irq >= 0)
1339 disable_irq(chip->tx_irq);
1340 if (chip->rx_irq >= 0)
1341 disable_irq(chip->rx_irq);
1342 snd_pmac_sound_feature(chip, 0);
1343 }
1344
1345 void snd_pmac_resume(struct snd_pmac *chip)
1346 {
1347 snd_pmac_sound_feature(chip, 1);
1348 if (chip->resume)
1349 chip->resume(chip);
1350 /* enable CD sound input */
1351 if (chip->macio_base && chip->is_pbook_G3)
1352 out_8(chip->macio_base + 0x37, 3);
1353 else if (chip->is_pbook_3400)
1354 in_8(chip->latch_base + 0x190);
1355
1356 snd_pmac_pcm_set_format(chip);
1357
1358 if (chip->irq >= 0)
1359 enable_irq(chip->irq);
1360 if (chip->tx_irq >= 0)
1361 enable_irq(chip->tx_irq);
1362 if (chip->rx_irq >= 0)
1363 enable_irq(chip->rx_irq);
1364
1365 snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
1366 }
1367
1368 #endif /* CONFIG_PM */
1369
1370
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.