1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Sound driver for Silicon Graphics O2 Workstations A/V board audio.
4 *
5 * Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>
6 * Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
7 * Mxier part taken from mace_audio.c:
8 * Copyright 2007 Thorben Jändling <tj.trevelyan@gmail.com>
9 */
10
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/spinlock.h>
14 #include <linux/interrupt.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/platform_device.h>
17 #include <linux/io.h>
18 #include <linux/slab.h>
19 #include <linux/module.h>
20
21 #include <asm/ip32/ip32_ints.h>
22 #include <asm/ip32/mace.h>
23
24 #include <sound/core.h>
25 #include <sound/control.h>
26 #include <sound/pcm.h>
27 #define SNDRV_GET_ID
28 #include <sound/initval.h>
29 #include <sound/ad1843.h>
30
31
32 MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>");
33 MODULE_DESCRIPTION("SGI O2 Audio");
34 MODULE_LICENSE("GPL");
35
36 static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
37 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
38
39 module_param(index, int, 0444);
40 MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard.");
41 module_param(id, charp, 0444);
42 MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard.");
43
44
45 #define AUDIO_CONTROL_RESET BIT(0) /* 1: reset audio interface */
46 #define AUDIO_CONTROL_CODEC_PRESENT BIT(1) /* 1: codec detected */
47
48 #define CODEC_CONTROL_WORD_SHIFT 0
49 #define CODEC_CONTROL_READ BIT(16)
50 #define CODEC_CONTROL_ADDRESS_SHIFT 17
51
52 #define CHANNEL_CONTROL_RESET BIT(10) /* 1: reset channel */
53 #define CHANNEL_DMA_ENABLE BIT(9) /* 1: enable DMA transfer */
54 #define CHANNEL_INT_THRESHOLD_DISABLED (0 << 5) /* interrupt disabled */
55 #define CHANNEL_INT_THRESHOLD_25 (1 << 5) /* int on buffer >25% full */
56 #define CHANNEL_INT_THRESHOLD_50 (2 << 5) /* int on buffer >50% full */
57 #define CHANNEL_INT_THRESHOLD_75 (3 << 5) /* int on buffer >75% full */
58 #define CHANNEL_INT_THRESHOLD_EMPTY (4 << 5) /* int on buffer empty */
59 #define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */
60 #define CHANNEL_INT_THRESHOLD_FULL (6 << 5) /* int on buffer empty */
61 #define CHANNEL_INT_THRESHOLD_NOT_FULL (7 << 5) /* int on buffer !empty */
62
63 #define CHANNEL_RING_SHIFT 12
64 #define CHANNEL_RING_SIZE (1 << CHANNEL_RING_SHIFT)
65 #define CHANNEL_RING_MASK (CHANNEL_RING_SIZE - 1)
66
67 #define CHANNEL_LEFT_SHIFT 40
68 #define CHANNEL_RIGHT_SHIFT 8
69
70 struct snd_sgio2audio_chan {
71 int idx;
72 struct snd_pcm_substream *substream;
73 int pos;
74 snd_pcm_uframes_t size;
75 spinlock_t lock;
76 };
77
78 /* definition of the chip-specific record */
79 struct snd_sgio2audio {
80 struct snd_card *card;
81
82 /* codec */
83 struct snd_ad1843 ad1843;
84 spinlock_t ad1843_lock;
85
86 /* channels */
87 struct snd_sgio2audio_chan channel[3];
88
89 /* resources */
90 void *ring_base;
91 dma_addr_t ring_base_dma;
92 };
93
94 /* AD1843 access */
95
96 /*
97 * read_ad1843_reg returns the current contents of a 16 bit AD1843 register.
98 *
99 * Returns unsigned register value on success, -errno on failure.
100 */
101 static int read_ad1843_reg(void *priv, int reg)
102 {
103 struct snd_sgio2audio *chip = priv;
104 int val;
105 unsigned long flags;
106
107 spin_lock_irqsave(&chip->ad1843_lock, flags);
108
109 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
110 CODEC_CONTROL_READ, &mace->perif.audio.codec_control);
111 wmb();
112 val = readq(&mace->perif.audio.codec_control); /* flush bus */
113 udelay(200);
114
115 val = readq(&mace->perif.audio.codec_read);
116
117 spin_unlock_irqrestore(&chip->ad1843_lock, flags);
118 return val;
119 }
120
121 /*
122 * write_ad1843_reg writes the specified value to a 16 bit AD1843 register.
123 */
124 static int write_ad1843_reg(void *priv, int reg, int word)
125 {
126 struct snd_sgio2audio *chip = priv;
127 int val;
128 unsigned long flags;
129
130 spin_lock_irqsave(&chip->ad1843_lock, flags);
131
132 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
133 (word << CODEC_CONTROL_WORD_SHIFT),
134 &mace->perif.audio.codec_control);
135 wmb();
136 val = readq(&mace->perif.audio.codec_control); /* flush bus */
137 udelay(200);
138
139 spin_unlock_irqrestore(&chip->ad1843_lock, flags);
140 return 0;
141 }
142
143 static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol,
144 struct snd_ctl_elem_info *uinfo)
145 {
146 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
147
148 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
149 uinfo->count = 2;
150 uinfo->value.integer.min = 0;
151 uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843,
152 (int)kcontrol->private_value);
153 return 0;
154 }
155
156 static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol,
157 struct snd_ctl_elem_value *ucontrol)
158 {
159 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
160 int vol;
161
162 vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value);
163
164 ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF;
165 ucontrol->value.integer.value[1] = vol & 0xFF;
166
167 return 0;
168 }
169
170 static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol,
171 struct snd_ctl_elem_value *ucontrol)
172 {
173 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
174 int newvol, oldvol;
175
176 oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value);
177 newvol = (ucontrol->value.integer.value[0] << 8) |
178 ucontrol->value.integer.value[1];
179
180 newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value,
181 newvol);
182
183 return newvol != oldvol;
184 }
185
186 static int sgio2audio_source_info(struct snd_kcontrol *kcontrol,
187 struct snd_ctl_elem_info *uinfo)
188 {
189 static const char * const texts[3] = {
190 "Cam Mic", "Mic", "Line"
191 };
192 return snd_ctl_enum_info(uinfo, 1, 3, texts);
193 }
194
195 static int sgio2audio_source_get(struct snd_kcontrol *kcontrol,
196 struct snd_ctl_elem_value *ucontrol)
197 {
198 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
199
200 ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843);
201 return 0;
202 }
203
204 static int sgio2audio_source_put(struct snd_kcontrol *kcontrol,
205 struct snd_ctl_elem_value *ucontrol)
206 {
207 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
208 int newsrc, oldsrc;
209
210 oldsrc = ad1843_get_recsrc(&chip->ad1843);
211 newsrc = ad1843_set_recsrc(&chip->ad1843,
212 ucontrol->value.enumerated.item[0]);
213
214 return newsrc != oldsrc;
215 }
216
217 /* dac1/pcm0 mixer control */
218 static const struct snd_kcontrol_new sgio2audio_ctrl_pcm0 = {
219 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
220 .name = "PCM Playback Volume",
221 .index = 0,
222 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
223 .private_value = AD1843_GAIN_PCM_0,
224 .info = sgio2audio_gain_info,
225 .get = sgio2audio_gain_get,
226 .put = sgio2audio_gain_put,
227 };
228
229 /* dac2/pcm1 mixer control */
230 static const struct snd_kcontrol_new sgio2audio_ctrl_pcm1 = {
231 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
232 .name = "PCM Playback Volume",
233 .index = 1,
234 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
235 .private_value = AD1843_GAIN_PCM_1,
236 .info = sgio2audio_gain_info,
237 .get = sgio2audio_gain_get,
238 .put = sgio2audio_gain_put,
239 };
240
241 /* record level mixer control */
242 static const struct snd_kcontrol_new sgio2audio_ctrl_reclevel = {
243 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
244 .name = "Capture Volume",
245 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
246 .private_value = AD1843_GAIN_RECLEV,
247 .info = sgio2audio_gain_info,
248 .get = sgio2audio_gain_get,
249 .put = sgio2audio_gain_put,
250 };
251
252 /* record level source control */
253 static const struct snd_kcontrol_new sgio2audio_ctrl_recsource = {
254 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
255 .name = "Capture Source",
256 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
257 .info = sgio2audio_source_info,
258 .get = sgio2audio_source_get,
259 .put = sgio2audio_source_put,
260 };
261
262 /* line mixer control */
263 static const struct snd_kcontrol_new sgio2audio_ctrl_line = {
264 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
265 .name = "Line Playback Volume",
266 .index = 0,
267 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
268 .private_value = AD1843_GAIN_LINE,
269 .info = sgio2audio_gain_info,
270 .get = sgio2audio_gain_get,
271 .put = sgio2audio_gain_put,
272 };
273
274 /* cd mixer control */
275 static const struct snd_kcontrol_new sgio2audio_ctrl_cd = {
276 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
277 .name = "Line Playback Volume",
278 .index = 1,
279 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
280 .private_value = AD1843_GAIN_LINE_2,
281 .info = sgio2audio_gain_info,
282 .get = sgio2audio_gain_get,
283 .put = sgio2audio_gain_put,
284 };
285
286 /* mic mixer control */
287 static const struct snd_kcontrol_new sgio2audio_ctrl_mic = {
288 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
289 .name = "Mic Playback Volume",
290 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
291 .private_value = AD1843_GAIN_MIC,
292 .info = sgio2audio_gain_info,
293 .get = sgio2audio_gain_get,
294 .put = sgio2audio_gain_put,
295 };
296
297
298 static int snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip)
299 {
300 int err;
301
302 err = snd_ctl_add(chip->card,
303 snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip));
304 if (err < 0)
305 return err;
306
307 err = snd_ctl_add(chip->card,
308 snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip));
309 if (err < 0)
310 return err;
311
312 err = snd_ctl_add(chip->card,
313 snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip));
314 if (err < 0)
315 return err;
316
317 err = snd_ctl_add(chip->card,
318 snd_ctl_new1(&sgio2audio_ctrl_recsource, chip));
319 if (err < 0)
320 return err;
321 err = snd_ctl_add(chip->card,
322 snd_ctl_new1(&sgio2audio_ctrl_line, chip));
323 if (err < 0)
324 return err;
325
326 err = snd_ctl_add(chip->card,
327 snd_ctl_new1(&sgio2audio_ctrl_cd, chip));
328 if (err < 0)
329 return err;
330
331 err = snd_ctl_add(chip->card,
332 snd_ctl_new1(&sgio2audio_ctrl_mic, chip));
333 if (err < 0)
334 return err;
335
336 return 0;
337 }
338
339 /* low-level audio interface DMA */
340
341 /* get data out of bounce buffer, count must be a multiple of 32 */
342 /* returns 1 if a period has elapsed */
343 static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip,
344 unsigned int ch, unsigned int count)
345 {
346 int ret;
347 unsigned long src_base, src_pos, dst_mask;
348 unsigned char *dst_base;
349 int dst_pos;
350 u64 *src;
351 s16 *dst;
352 u64 x;
353 unsigned long flags;
354 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
355
356 spin_lock_irqsave(&chip->channel[ch].lock, flags);
357
358 src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT);
359 src_pos = readq(&mace->perif.audio.chan[ch].read_ptr);
360 dst_base = runtime->dma_area;
361 dst_pos = chip->channel[ch].pos;
362 dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
363
364 /* check if a period has elapsed */
365 chip->channel[ch].size += (count >> 3); /* in frames */
366 ret = chip->channel[ch].size >= runtime->period_size;
367 chip->channel[ch].size %= runtime->period_size;
368
369 while (count) {
370 src = (u64 *)(src_base + src_pos);
371 dst = (s16 *)(dst_base + dst_pos);
372
373 x = *src;
374 dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff;
375 dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff;
376
377 src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK;
378 dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask;
379 count -= sizeof(u64);
380 }
381
382 writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */
383 chip->channel[ch].pos = dst_pos;
384
385 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
386 return ret;
387 }
388
389 /* put some DMA data in bounce buffer, count must be a multiple of 32 */
390 /* returns 1 if a period has elapsed */
391 static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip,
392 unsigned int ch, unsigned int count)
393 {
394 int ret;
395 s64 l, r;
396 unsigned long dst_base, dst_pos, src_mask;
397 unsigned char *src_base;
398 int src_pos;
399 u64 *dst;
400 s16 *src;
401 unsigned long flags;
402 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
403
404 spin_lock_irqsave(&chip->channel[ch].lock, flags);
405
406 dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT);
407 dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr);
408 src_base = runtime->dma_area;
409 src_pos = chip->channel[ch].pos;
410 src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
411
412 /* check if a period has elapsed */
413 chip->channel[ch].size += (count >> 3); /* in frames */
414 ret = chip->channel[ch].size >= runtime->period_size;
415 chip->channel[ch].size %= runtime->period_size;
416
417 while (count) {
418 src = (s16 *)(src_base + src_pos);
419 dst = (u64 *)(dst_base + dst_pos);
420
421 l = src[0]; /* sign extend */
422 r = src[1]; /* sign extend */
423
424 *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) |
425 ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT);
426
427 dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK;
428 src_pos = (src_pos + 2 * sizeof(s16)) & src_mask;
429 count -= sizeof(u64);
430 }
431
432 writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */
433 chip->channel[ch].pos = src_pos;
434
435 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
436 return ret;
437 }
438
439 static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream)
440 {
441 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
442 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
443 int ch = chan->idx;
444
445 /* reset DMA channel */
446 writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control);
447 udelay(10);
448 writeq(0, &mace->perif.audio.chan[ch].control);
449
450 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
451 /* push a full buffer */
452 snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32);
453 }
454 /* set DMA to wake on 50% empty and enable interrupt */
455 writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50,
456 &mace->perif.audio.chan[ch].control);
457 return 0;
458 }
459
460 static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream)
461 {
462 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
463
464 writeq(0, &mace->perif.audio.chan[chan->idx].control);
465 return 0;
466 }
467
468 static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id)
469 {
470 struct snd_sgio2audio_chan *chan = dev_id;
471 struct snd_pcm_substream *substream;
472 struct snd_sgio2audio *chip;
473 int count, ch;
474
475 substream = chan->substream;
476 chip = snd_pcm_substream_chip(substream);
477 ch = chan->idx;
478
479 /* empty the ring */
480 count = CHANNEL_RING_SIZE -
481 readq(&mace->perif.audio.chan[ch].depth) - 32;
482 if (snd_sgio2audio_dma_pull_frag(chip, ch, count))
483 snd_pcm_period_elapsed(substream);
484
485 return IRQ_HANDLED;
486 }
487
488 static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id)
489 {
490 struct snd_sgio2audio_chan *chan = dev_id;
491 struct snd_pcm_substream *substream;
492 struct snd_sgio2audio *chip;
493 int count, ch;
494
495 substream = chan->substream;
496 chip = snd_pcm_substream_chip(substream);
497 ch = chan->idx;
498 /* fill the ring */
499 count = CHANNEL_RING_SIZE -
500 readq(&mace->perif.audio.chan[ch].depth) - 32;
501 if (snd_sgio2audio_dma_push_frag(chip, ch, count))
502 snd_pcm_period_elapsed(substream);
503
504 return IRQ_HANDLED;
505 }
506
507 static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)
508 {
509 struct snd_sgio2audio_chan *chan = dev_id;
510 struct snd_pcm_substream *substream;
511
512 substream = chan->substream;
513 snd_sgio2audio_dma_stop(substream);
514 snd_sgio2audio_dma_start(substream);
515 return IRQ_HANDLED;
516 }
517
518 /* PCM part */
519 /* PCM hardware definition */
520 static const struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
521 .info = (SNDRV_PCM_INFO_MMAP |
522 SNDRV_PCM_INFO_MMAP_VALID |
523 SNDRV_PCM_INFO_INTERLEAVED |
524 SNDRV_PCM_INFO_BLOCK_TRANSFER),
525 .formats = SNDRV_PCM_FMTBIT_S16_BE,
526 .rates = SNDRV_PCM_RATE_8000_48000,
527 .rate_min = 8000,
528 .rate_max = 48000,
529 .channels_min = 2,
530 .channels_max = 2,
531 .buffer_bytes_max = 65536,
532 .period_bytes_min = 32768,
533 .period_bytes_max = 65536,
534 .periods_min = 1,
535 .periods_max = 1024,
536 };
537
538 /* PCM playback open callback */
539 static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream)
540 {
541 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
542 struct snd_pcm_runtime *runtime = substream->runtime;
543
544 runtime->hw = snd_sgio2audio_pcm_hw;
545 runtime->private_data = &chip->channel[1];
546 return 0;
547 }
548
549 static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream)
550 {
551 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
552 struct snd_pcm_runtime *runtime = substream->runtime;
553
554 runtime->hw = snd_sgio2audio_pcm_hw;
555 runtime->private_data = &chip->channel[2];
556 return 0;
557 }
558
559 /* PCM capture open callback */
560 static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream)
561 {
562 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
563 struct snd_pcm_runtime *runtime = substream->runtime;
564
565 runtime->hw = snd_sgio2audio_pcm_hw;
566 runtime->private_data = &chip->channel[0];
567 return 0;
568 }
569
570 /* PCM close callback */
571 static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream)
572 {
573 struct snd_pcm_runtime *runtime = substream->runtime;
574
575 runtime->private_data = NULL;
576 return 0;
577 }
578
579 /* prepare callback */
580 static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)
581 {
582 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
583 struct snd_pcm_runtime *runtime = substream->runtime;
584 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
585 int ch = chan->idx;
586 unsigned long flags;
587
588 spin_lock_irqsave(&chip->channel[ch].lock, flags);
589
590 /* Setup the pseudo-dma transfer pointers. */
591 chip->channel[ch].pos = 0;
592 chip->channel[ch].size = 0;
593 chip->channel[ch].substream = substream;
594
595 /* set AD1843 format */
596 /* hardware format is always S16_LE */
597 switch (substream->stream) {
598 case SNDRV_PCM_STREAM_PLAYBACK:
599 ad1843_setup_dac(&chip->ad1843,
600 ch - 1,
601 runtime->rate,
602 SNDRV_PCM_FORMAT_S16_LE,
603 runtime->channels);
604 break;
605 case SNDRV_PCM_STREAM_CAPTURE:
606 ad1843_setup_adc(&chip->ad1843,
607 runtime->rate,
608 SNDRV_PCM_FORMAT_S16_LE,
609 runtime->channels);
610 break;
611 }
612 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
613 return 0;
614 }
615
616 /* trigger callback */
617 static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,
618 int cmd)
619 {
620 switch (cmd) {
621 case SNDRV_PCM_TRIGGER_START:
622 /* start the PCM engine */
623 snd_sgio2audio_dma_start(substream);
624 break;
625 case SNDRV_PCM_TRIGGER_STOP:
626 /* stop the PCM engine */
627 snd_sgio2audio_dma_stop(substream);
628 break;
629 default:
630 return -EINVAL;
631 }
632 return 0;
633 }
634
635 /* pointer callback */
636 static snd_pcm_uframes_t
637 snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)
638 {
639 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
640 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
641
642 /* get the current hardware pointer */
643 return bytes_to_frames(substream->runtime,
644 chip->channel[chan->idx].pos);
645 }
646
647 /* operators */
648 static const struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
649 .open = snd_sgio2audio_playback1_open,
650 .close = snd_sgio2audio_pcm_close,
651 .prepare = snd_sgio2audio_pcm_prepare,
652 .trigger = snd_sgio2audio_pcm_trigger,
653 .pointer = snd_sgio2audio_pcm_pointer,
654 };
655
656 static const struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
657 .open = snd_sgio2audio_playback2_open,
658 .close = snd_sgio2audio_pcm_close,
659 .prepare = snd_sgio2audio_pcm_prepare,
660 .trigger = snd_sgio2audio_pcm_trigger,
661 .pointer = snd_sgio2audio_pcm_pointer,
662 };
663
664 static const struct snd_pcm_ops snd_sgio2audio_capture_ops = {
665 .open = snd_sgio2audio_capture_open,
666 .close = snd_sgio2audio_pcm_close,
667 .prepare = snd_sgio2audio_pcm_prepare,
668 .trigger = snd_sgio2audio_pcm_trigger,
669 .pointer = snd_sgio2audio_pcm_pointer,
670 };
671
672 /*
673 * definitions of capture are omitted here...
674 */
675
676 /* create a pcm device */
677 static int snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)
678 {
679 struct snd_pcm *pcm;
680 int err;
681
682 /* create first pcm device with one outputs and one input */
683 err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);
684 if (err < 0)
685 return err;
686
687 pcm->private_data = chip;
688 strcpy(pcm->name, "SGI O2 DAC1");
689
690 /* set operators */
691 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
692 &snd_sgio2audio_playback1_ops);
693 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
694 &snd_sgio2audio_capture_ops);
695 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
696
697 /* create second pcm device with one outputs and no input */
698 err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);
699 if (err < 0)
700 return err;
701
702 pcm->private_data = chip;
703 strcpy(pcm->name, "SGI O2 DAC2");
704
705 /* set operators */
706 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
707 &snd_sgio2audio_playback2_ops);
708 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
709
710 return 0;
711 }
712
713 static struct {
714 int idx;
715 int irq;
716 irqreturn_t (*isr)(int, void *);
717 const char *desc;
718 } snd_sgio2_isr_table[] = {
719 {
720 .idx = 0,
721 .irq = MACEISA_AUDIO1_DMAT_IRQ,
722 .isr = snd_sgio2audio_dma_in_isr,
723 .desc = "Capture DMA Channel 0"
724 }, {
725 .idx = 0,
726 .irq = MACEISA_AUDIO1_OF_IRQ,
727 .isr = snd_sgio2audio_error_isr,
728 .desc = "Capture Overflow"
729 }, {
730 .idx = 1,
731 .irq = MACEISA_AUDIO2_DMAT_IRQ,
732 .isr = snd_sgio2audio_dma_out_isr,
733 .desc = "Playback DMA Channel 1"
734 }, {
735 .idx = 1,
736 .irq = MACEISA_AUDIO2_MERR_IRQ,
737 .isr = snd_sgio2audio_error_isr,
738 .desc = "Memory Error Channel 1"
739 }, {
740 .idx = 2,
741 .irq = MACEISA_AUDIO3_DMAT_IRQ,
742 .isr = snd_sgio2audio_dma_out_isr,
743 .desc = "Playback DMA Channel 2"
744 }, {
745 .idx = 2,
746 .irq = MACEISA_AUDIO3_MERR_IRQ,
747 .isr = snd_sgio2audio_error_isr,
748 .desc = "Memory Error Channel 2"
749 }
750 };
751
752 /* ALSA driver */
753
754 static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
755 {
756 int i;
757
758 /* reset interface */
759 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
760 udelay(1);
761 writeq(0, &mace->perif.audio.control);
762
763 /* release IRQ's */
764 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
765 free_irq(snd_sgio2_isr_table[i].irq,
766 &chip->channel[snd_sgio2_isr_table[i].idx]);
767
768 dma_free_coherent(chip->card->dev, MACEISA_RINGBUFFERS_SIZE,
769 chip->ring_base, chip->ring_base_dma);
770
771 /* release card data */
772 kfree(chip);
773 return 0;
774 }
775
776 static int snd_sgio2audio_dev_free(struct snd_device *device)
777 {
778 struct snd_sgio2audio *chip = device->device_data;
779
780 return snd_sgio2audio_free(chip);
781 }
782
783 static const struct snd_device_ops ops = {
784 .dev_free = snd_sgio2audio_dev_free,
785 };
786
787 static int snd_sgio2audio_create(struct snd_card *card,
788 struct snd_sgio2audio **rchip)
789 {
790 struct snd_sgio2audio *chip;
791 int i, err;
792
793 *rchip = NULL;
794
795 /* check if a codec is attached to the interface */
796 /* (Audio or Audio/Video board present) */
797 if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))
798 return -ENOENT;
799
800 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
801 if (chip == NULL)
802 return -ENOMEM;
803
804 chip->card = card;
805
806 chip->ring_base = dma_alloc_coherent(card->dev,
807 MACEISA_RINGBUFFERS_SIZE,
808 &chip->ring_base_dma, GFP_KERNEL);
809 if (chip->ring_base == NULL) {
810 printk(KERN_ERR
811 "sgio2audio: could not allocate ring buffers\n");
812 kfree(chip);
813 return -ENOMEM;
814 }
815
816 spin_lock_init(&chip->ad1843_lock);
817
818 /* initialize channels */
819 for (i = 0; i < 3; i++) {
820 spin_lock_init(&chip->channel[i].lock);
821 chip->channel[i].idx = i;
822 }
823
824 /* allocate IRQs */
825 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {
826 if (request_irq(snd_sgio2_isr_table[i].irq,
827 snd_sgio2_isr_table[i].isr,
828 0,
829 snd_sgio2_isr_table[i].desc,
830 &chip->channel[snd_sgio2_isr_table[i].idx])) {
831 snd_sgio2audio_free(chip);
832 printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
833 snd_sgio2_isr_table[i].irq);
834 return -EBUSY;
835 }
836 }
837
838 /* reset the interface */
839 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
840 udelay(1);
841 writeq(0, &mace->perif.audio.control);
842 msleep_interruptible(1); /* give time to recover */
843
844 /* set ring base */
845 writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);
846
847 /* attach the AD1843 codec */
848 chip->ad1843.read = read_ad1843_reg;
849 chip->ad1843.write = write_ad1843_reg;
850 chip->ad1843.chip = chip;
851
852 /* initialize the AD1843 codec */
853 err = ad1843_init(&chip->ad1843);
854 if (err < 0) {
855 snd_sgio2audio_free(chip);
856 return err;
857 }
858
859 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
860 if (err < 0) {
861 snd_sgio2audio_free(chip);
862 return err;
863 }
864 *rchip = chip;
865 return 0;
866 }
867
868 static int snd_sgio2audio_probe(struct platform_device *pdev)
869 {
870 struct snd_card *card;
871 struct snd_sgio2audio *chip;
872 int err;
873
874 err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card);
875 if (err < 0)
876 return err;
877
878 err = snd_sgio2audio_create(card, &chip);
879 if (err < 0) {
880 snd_card_free(card);
881 return err;
882 }
883
884 err = snd_sgio2audio_new_pcm(chip);
885 if (err < 0) {
886 snd_card_free(card);
887 return err;
888 }
889 err = snd_sgio2audio_new_mixer(chip);
890 if (err < 0) {
891 snd_card_free(card);
892 return err;
893 }
894
895 strcpy(card->driver, "SGI O2 Audio");
896 strcpy(card->shortname, "SGI O2 Audio");
897 sprintf(card->longname, "%s irq %i-%i",
898 card->shortname,
899 MACEISA_AUDIO1_DMAT_IRQ,
900 MACEISA_AUDIO3_MERR_IRQ);
901
902 err = snd_card_register(card);
903 if (err < 0) {
904 snd_card_free(card);
905 return err;
906 }
907 platform_set_drvdata(pdev, card);
908 return 0;
909 }
910
911 static void snd_sgio2audio_remove(struct platform_device *pdev)
912 {
913 struct snd_card *card = platform_get_drvdata(pdev);
914
915 snd_card_free(card);
916 }
917
918 static struct platform_driver sgio2audio_driver = {
919 .probe = snd_sgio2audio_probe,
920 .remove_new = snd_sgio2audio_remove,
921 .driver = {
922 .name = "sgio2audio",
923 }
924 };
925
926 module_platform_driver(sgio2audio_driver);
927
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