projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
[linux-block.git] / sound / mips / sgio2audio.c
CommitLineData
1a59d1b8 1// SPDX-License-Identifier: GPL-2.0-or-later
862c2c0a
TB		 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>
862c2c0a
TB		 9 */
10
11#include <linux/init.h>
12#include <linux/delay.h>
13#include <linux/spinlock.h>
862c2c0a
TB		 14#include <linux/interrupt.h>
15#include <linux/dma-mapping.h>
16#include <linux/platform_device.h>
17#include <linux/io.h>
5a0e3ad6 18#include <linux/slab.h>
da155d5b 19#include <linux/module.h>
862c2c0a
TB		 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
32MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>");
33MODULE_DESCRIPTION("SGI O2 Audio");
34MODULE_LICENSE("GPL");
35MODULE_SUPPORTED_DEVICE("{{Silicon Graphics, O2 Audio}}");
36
37static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
38static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */
39
40module_param(index, int, 0444);
41MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard.");
42module_param(id, charp, 0444);
43MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard.");
44
45
46#define AUDIO_CONTROL_RESET BIT(0) /* 1: reset audio interface */
47#define AUDIO_CONTROL_CODEC_PRESENT BIT(1) /* 1: codec detected */
48
49#define CODEC_CONTROL_WORD_SHIFT 0
50#define CODEC_CONTROL_READ BIT(16)
51#define CODEC_CONTROL_ADDRESS_SHIFT 17
52
53#define CHANNEL_CONTROL_RESET BIT(10) /* 1: reset channel */
54#define CHANNEL_DMA_ENABLE BIT(9) /* 1: enable DMA transfer */
55#define CHANNEL_INT_THRESHOLD_DISABLED (0 << 5) /* interrupt disabled */
56#define CHANNEL_INT_THRESHOLD_25 (1 << 5) /* int on buffer >25% full */
57#define CHANNEL_INT_THRESHOLD_50 (2 << 5) /* int on buffer >50% full */
58#define CHANNEL_INT_THRESHOLD_75 (3 << 5) /* int on buffer >75% full */
59#define CHANNEL_INT_THRESHOLD_EMPTY (4 << 5) /* int on buffer empty */
60#define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */
61#define CHANNEL_INT_THRESHOLD_FULL (6 << 5) /* int on buffer empty */
62#define CHANNEL_INT_THRESHOLD_NOT_FULL (7 << 5) /* int on buffer !empty */
63
64#define CHANNEL_RING_SHIFT 12
65#define CHANNEL_RING_SIZE (1 << CHANNEL_RING_SHIFT)
66#define CHANNEL_RING_MASK (CHANNEL_RING_SIZE - 1)
67
68#define CHANNEL_LEFT_SHIFT 40
69#define CHANNEL_RIGHT_SHIFT 8
70
71struct snd_sgio2audio_chan {
72 int idx;
73 struct snd_pcm_substream *substream;
74 int pos;
75 snd_pcm_uframes_t size;
76 spinlock_t lock;
77};
78
79/* definition of the chip-specific record */
80struct snd_sgio2audio {
81 struct snd_card *card;
82
83 /* codec */
84 struct snd_ad1843 ad1843;
85 spinlock_t ad1843_lock;
86
87 /* channels */
88 struct snd_sgio2audio_chan channel[3];
89
90 /* resources */
91 void *ring_base;
92 dma_addr_t ring_base_dma;
93};
94
95/* AD1843 access */
96
97/*
98 * read_ad1843_reg returns the current contents of a 16 bit AD1843 register.
99 *
100 * Returns unsigned register value on success, -errno on failure.
101 */
102static int read_ad1843_reg(void *priv, int reg)
103{
104 struct snd_sgio2audio *chip = priv;
105 int val;
106 unsigned long flags;
107
108 spin_lock_irqsave(&chip->ad1843_lock, flags);
109
110 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
111 CODEC_CONTROL_READ, &mace->perif.audio.codec_control);
112 wmb();
113 val = readq(&mace->perif.audio.codec_control); /* flush bus */
114 udelay(200);
115
116 val = readq(&mace->perif.audio.codec_read);
117
118 spin_unlock_irqrestore(&chip->ad1843_lock, flags);
119 return val;
120}
121
122/*
123 * write_ad1843_reg writes the specified value to a 16 bit AD1843 register.
124 */
125static int write_ad1843_reg(void *priv, int reg, int word)
126{
127 struct snd_sgio2audio *chip = priv;
128 int val;
129 unsigned long flags;
130
131 spin_lock_irqsave(&chip->ad1843_lock, flags);
132
133 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |
134 (word << CODEC_CONTROL_WORD_SHIFT),
135 &mace->perif.audio.codec_control);
136 wmb();
137 val = readq(&mace->perif.audio.codec_control); /* flush bus */
138 udelay(200);
139
140 spin_unlock_irqrestore(&chip->ad1843_lock, flags);
141 return 0;
142}
143
144static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol,
145 struct snd_ctl_elem_info *uinfo)
146{
147 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
148
149 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
150 uinfo->count = 2;
151 uinfo->value.integer.min = 0;
152 uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843,
153 (int)kcontrol->private_value);
154 return 0;
155}
156
157static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol,
158 struct snd_ctl_elem_value *ucontrol)
159{
160 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
161 int vol;
162
163 vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value);
164
165 ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF;
166 ucontrol->value.integer.value[1] = vol & 0xFF;
167
168 return 0;
169}
170
171static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
173{
174 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
175 int newvol, oldvol;
176
177 oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value);
178 newvol = (ucontrol->value.integer.value[0] << 8) |
179 ucontrol->value.integer.value[1];
180
181 newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value,
182 newvol);
183
184 return newvol != oldvol;
185}
186
187static int sgio2audio_source_info(struct snd_kcontrol *kcontrol,
188 struct snd_ctl_elem_info *uinfo)
189{
2a2085ab 190 static const char * const texts[3] = {
862c2c0a
TB		 191 "Cam Mic", "Mic", "Line"
192 };
2a2085ab 193 return snd_ctl_enum_info(uinfo, 1, 3, texts);
862c2c0a
TB		 194}
195
196static int sgio2audio_source_get(struct snd_kcontrol *kcontrol,
197 struct snd_ctl_elem_value *ucontrol)
198{
199 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
200
201 ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843);
202 return 0;
203}
204
205static int sgio2audio_source_put(struct snd_kcontrol *kcontrol,
206 struct snd_ctl_elem_value *ucontrol)
207{
208 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);
209 int newsrc, oldsrc;
210
211 oldsrc = ad1843_get_recsrc(&chip->ad1843);
212 newsrc = ad1843_set_recsrc(&chip->ad1843,
213 ucontrol->value.enumerated.item[0]);
214
215 return newsrc != oldsrc;
216}
217
218/* dac1/pcm0 mixer control */
905e46ac 219static const struct snd_kcontrol_new sgio2audio_ctrl_pcm0 = {
862c2c0a
TB		 220 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
221 .name = "PCM Playback Volume",
222 .index = 0,
223 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
224 .private_value = AD1843_GAIN_PCM_0,
225 .info = sgio2audio_gain_info,
226 .get = sgio2audio_gain_get,
227 .put = sgio2audio_gain_put,
228};
229
230/* dac2/pcm1 mixer control */
905e46ac 231static const struct snd_kcontrol_new sgio2audio_ctrl_pcm1 = {
862c2c0a
TB		 232 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
233 .name = "PCM Playback Volume",
234 .index = 1,
235 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
236 .private_value = AD1843_GAIN_PCM_1,
237 .info = sgio2audio_gain_info,
238 .get = sgio2audio_gain_get,
239 .put = sgio2audio_gain_put,
240};
241
242/* record level mixer control */
905e46ac 243static const struct snd_kcontrol_new sgio2audio_ctrl_reclevel = {
862c2c0a
TB		 244 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
245 .name = "Capture Volume",
246 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
247 .private_value = AD1843_GAIN_RECLEV,
248 .info = sgio2audio_gain_info,
249 .get = sgio2audio_gain_get,
250 .put = sgio2audio_gain_put,
251};
252
253/* record level source control */
905e46ac 254static const struct snd_kcontrol_new sgio2audio_ctrl_recsource = {
862c2c0a
TB		 255 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
256 .name = "Capture Source",
257 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
258 .info = sgio2audio_source_info,
259 .get = sgio2audio_source_get,
260 .put = sgio2audio_source_put,
261};
262
263/* line mixer control */
905e46ac 264static const struct snd_kcontrol_new sgio2audio_ctrl_line = {
862c2c0a
TB		 265 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
266 .name = "Line Playback Volume",
267 .index = 0,
268 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
269 .private_value = AD1843_GAIN_LINE,
270 .info = sgio2audio_gain_info,
271 .get = sgio2audio_gain_get,
272 .put = sgio2audio_gain_put,
273};
274
275/* cd mixer control */
905e46ac 276static const struct snd_kcontrol_new sgio2audio_ctrl_cd = {
862c2c0a
TB		 277 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
278 .name = "Line Playback Volume",
279 .index = 1,
280 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
281 .private_value = AD1843_GAIN_LINE_2,
282 .info = sgio2audio_gain_info,
283 .get = sgio2audio_gain_get,
284 .put = sgio2audio_gain_put,
285};
286
287/* mic mixer control */
905e46ac 288static const struct snd_kcontrol_new sgio2audio_ctrl_mic = {
862c2c0a
TB		 289 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
290 .name = "Mic Playback Volume",
291 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
292 .private_value = AD1843_GAIN_MIC,
293 .info = sgio2audio_gain_info,
294 .get = sgio2audio_gain_get,
295 .put = sgio2audio_gain_put,
296};
297
298
e0f8cb5f 299static int snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip)
862c2c0a
TB		 300{
301 int err;
302
303 err = snd_ctl_add(chip->card,
304 snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip));
305 if (err < 0)
306 return err;
307
308 err = snd_ctl_add(chip->card,
309 snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip));
310 if (err < 0)
311 return err;
312
313 err = snd_ctl_add(chip->card,
314 snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip));
315 if (err < 0)
316 return err;
317
318 err = snd_ctl_add(chip->card,
319 snd_ctl_new1(&sgio2audio_ctrl_recsource, chip));
320 if (err < 0)
321 return err;
322 err = snd_ctl_add(chip->card,
323 snd_ctl_new1(&sgio2audio_ctrl_line, chip));
324 if (err < 0)
325 return err;
326
327 err = snd_ctl_add(chip->card,
328 snd_ctl_new1(&sgio2audio_ctrl_cd, chip));
329 if (err < 0)
330 return err;
331
332 err = snd_ctl_add(chip->card,
333 snd_ctl_new1(&sgio2audio_ctrl_mic, chip));
334 if (err < 0)
335 return err;
336
337 return 0;
338}
339
340/* low-level audio interface DMA */
341
342/* get data out of bounce buffer, count must be a multiple of 32 */
343/* returns 1 if a period has elapsed */
344static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip,
345 unsigned int ch, unsigned int count)
346{
347 int ret;
348 unsigned long src_base, src_pos, dst_mask;
349 unsigned char *dst_base;
350 int dst_pos;
351 u64 *src;
352 s16 *dst;
353 u64 x;
354 unsigned long flags;
355 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
356
357 spin_lock_irqsave(&chip->channel[ch].lock, flags);
358
359 src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT);
360 src_pos = readq(&mace->perif.audio.chan[ch].read_ptr);
361 dst_base = runtime->dma_area;
362 dst_pos = chip->channel[ch].pos;
363 dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
364
365 /* check if a period has elapsed */
366 chip->channel[ch].size += (count >> 3); /* in frames */
367 ret = chip->channel[ch].size >= runtime->period_size;
368 chip->channel[ch].size %= runtime->period_size;
369
370 while (count) {
371 src = (u64 *)(src_base + src_pos);
372 dst = (s16 *)(dst_base + dst_pos);
373
374 x = *src;
375 dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff;
376 dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff;
377
378 src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK;
379 dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask;
380 count -= sizeof(u64);
381 }
382
383 writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */
384 chip->channel[ch].pos = dst_pos;
385
386 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
387 return ret;
388}
389
390/* put some DMA data in bounce buffer, count must be a multiple of 32 */
391/* returns 1 if a period has elapsed */
392static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip,
393 unsigned int ch, unsigned int count)
394{
395 int ret;
396 s64 l, r;
397 unsigned long dst_base, dst_pos, src_mask;
398 unsigned char *src_base;
399 int src_pos;
400 u64 *dst;
401 s16 *src;
402 unsigned long flags;
403 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;
404
405 spin_lock_irqsave(&chip->channel[ch].lock, flags);
406
407 dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT);
408 dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr);
409 src_base = runtime->dma_area;
410 src_pos = chip->channel[ch].pos;
411 src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;
412
413 /* check if a period has elapsed */
414 chip->channel[ch].size += (count >> 3); /* in frames */
415 ret = chip->channel[ch].size >= runtime->period_size;
416 chip->channel[ch].size %= runtime->period_size;
417
418 while (count) {
419 src = (s16 *)(src_base + src_pos);
420 dst = (u64 *)(dst_base + dst_pos);
421
422 l = src[0]; /* sign extend */
423 r = src[1]; /* sign extend */
424
425 *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) |
426 ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT);
427
428 dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK;
429 src_pos = (src_pos + 2 * sizeof(s16)) & src_mask;
430 count -= sizeof(u64);
431 }
432
433 writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */
434 chip->channel[ch].pos = src_pos;
435
436 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
437 return ret;
438}
439
440static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream)
441{
442 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
443 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
444 int ch = chan->idx;
445
446 /* reset DMA channel */
447 writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control);
448 udelay(10);
449 writeq(0, &mace->perif.audio.chan[ch].control);
450
451 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
452 /* push a full buffer */
453 snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32);
454 }
455 /* set DMA to wake on 50% empty and enable interrupt */
456 writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50,
457 &mace->perif.audio.chan[ch].control);
458 return 0;
459}
460
461static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream)
462{
463 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
464
465 writeq(0, &mace->perif.audio.chan[chan->idx].control);
466 return 0;
467}
468
469static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id)
470{
471 struct snd_sgio2audio_chan *chan = dev_id;
472 struct snd_pcm_substream *substream;
473 struct snd_sgio2audio *chip;
474 int count, ch;
475
476 substream = chan->substream;
477 chip = snd_pcm_substream_chip(substream);
478 ch = chan->idx;
479
480 /* empty the ring */
481 count = CHANNEL_RING_SIZE -
482 readq(&mace->perif.audio.chan[ch].depth) - 32;
483 if (snd_sgio2audio_dma_pull_frag(chip, ch, count))
484 snd_pcm_period_elapsed(substream);
485
486 return IRQ_HANDLED;
487}
488
489static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id)
490{
491 struct snd_sgio2audio_chan *chan = dev_id;
492 struct snd_pcm_substream *substream;
493 struct snd_sgio2audio *chip;
494 int count, ch;
495
496 substream = chan->substream;
497 chip = snd_pcm_substream_chip(substream);
498 ch = chan->idx;
499 /* fill the ring */
500 count = CHANNEL_RING_SIZE -
501 readq(&mace->perif.audio.chan[ch].depth) - 32;
502 if (snd_sgio2audio_dma_push_frag(chip, ch, count))
503 snd_pcm_period_elapsed(substream);
504
505 return IRQ_HANDLED;
506}
507
508static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)
509{
510 struct snd_sgio2audio_chan *chan = dev_id;
511 struct snd_pcm_substream *substream;
512
513 substream = chan->substream;
514 snd_sgio2audio_dma_stop(substream);
515 snd_sgio2audio_dma_start(substream);
516 return IRQ_HANDLED;
517}
518
519/* PCM part */
520/* PCM hardware definition */
3068116f 521static const struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {
862c2c0a
TB		 522 .info = (SNDRV_PCM_INFO_MMAP |
523 SNDRV_PCM_INFO_MMAP_VALID |
524 SNDRV_PCM_INFO_INTERLEAVED |
525 SNDRV_PCM_INFO_BLOCK_TRANSFER),
526 .formats = SNDRV_PCM_FMTBIT_S16_BE,
527 .rates = SNDRV_PCM_RATE_8000_48000,
528 .rate_min = 8000,
529 .rate_max = 48000,
530 .channels_min = 2,
531 .channels_max = 2,
532 .buffer_bytes_max = 65536,
533 .period_bytes_min = 32768,
534 .period_bytes_max = 65536,
535 .periods_min = 1,
536 .periods_max = 1024,
537};
538
539/* PCM playback open callback */
540static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream)
541{
542 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
543 struct snd_pcm_runtime *runtime = substream->runtime;
544
545 runtime->hw = snd_sgio2audio_pcm_hw;
546 runtime->private_data = &chip->channel[1];
547 return 0;
548}
549
550static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream)
551{
552 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
553 struct snd_pcm_runtime *runtime = substream->runtime;
554
555 runtime->hw = snd_sgio2audio_pcm_hw;
556 runtime->private_data = &chip->channel[2];
557 return 0;
558}
559
560/* PCM capture open callback */
561static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream)
562{
563 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
564 struct snd_pcm_runtime *runtime = substream->runtime;
565
566 runtime->hw = snd_sgio2audio_pcm_hw;
567 runtime->private_data = &chip->channel[0];
568 return 0;
569}
570
571/* PCM close callback */
572static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream)
573{
574 struct snd_pcm_runtime *runtime = substream->runtime;
575
576 runtime->private_data = NULL;
577 return 0;
578}
579
580
581/* hw_params callback */
582static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream,
583 struct snd_pcm_hw_params *hw_params)
584{
6cedf869
CL		 585 return snd_pcm_lib_alloc_vmalloc_buffer(substream,
586 params_buffer_bytes(hw_params));
862c2c0a
TB		 587}
588
589/* hw_free callback */
590static int snd_sgio2audio_pcm_hw_free(struct snd_pcm_substream *substream)
591{
6cedf869 592 return snd_pcm_lib_free_vmalloc_buffer(substream);
862c2c0a
TB		 593}
594
595/* prepare callback */
596static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)
597{
598 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
599 struct snd_pcm_runtime *runtime = substream->runtime;
600 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
601 int ch = chan->idx;
602 unsigned long flags;
603
604 spin_lock_irqsave(&chip->channel[ch].lock, flags);
605
606 /* Setup the pseudo-dma transfer pointers. */
607 chip->channel[ch].pos = 0;
608 chip->channel[ch].size = 0;
609 chip->channel[ch].substream = substream;
610
611 /* set AD1843 format */
612 /* hardware format is always S16_LE */
613 switch (substream->stream) {
614 case SNDRV_PCM_STREAM_PLAYBACK:
615 ad1843_setup_dac(&chip->ad1843,
616 ch - 1,
617 runtime->rate,
618 SNDRV_PCM_FORMAT_S16_LE,
619 runtime->channels);
620 break;
621 case SNDRV_PCM_STREAM_CAPTURE:
622 ad1843_setup_adc(&chip->ad1843,
623 runtime->rate,
624 SNDRV_PCM_FORMAT_S16_LE,
625 runtime->channels);
626 break;
627 }
628 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
629 return 0;
630}
631
632/* trigger callback */
633static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,
634 int cmd)
635{
636 switch (cmd) {
637 case SNDRV_PCM_TRIGGER_START:
638 /* start the PCM engine */
639 snd_sgio2audio_dma_start(substream);
640 break;
641 case SNDRV_PCM_TRIGGER_STOP:
642 /* stop the PCM engine */
643 snd_sgio2audio_dma_stop(substream);
644 break;
645 default:
646 return -EINVAL;
647 }
648 return 0;
649}
650
651/* pointer callback */
652static snd_pcm_uframes_t
653snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)
654{
655 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
656 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
657
658 /* get the current hardware pointer */
659 return bytes_to_frames(substream->runtime,
660 chip->channel[chan->idx].pos);
661}
662
862c2c0a 663/* operators */
915a38d3 664static const struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
862c2c0a
TB		 665 .open = snd_sgio2audio_playback1_open,
666 .close = snd_sgio2audio_pcm_close,
667 .ioctl = snd_pcm_lib_ioctl,
668 .hw_params = snd_sgio2audio_pcm_hw_params,
669 .hw_free = snd_sgio2audio_pcm_hw_free,
670 .prepare = snd_sgio2audio_pcm_prepare,
671 .trigger = snd_sgio2audio_pcm_trigger,
672 .pointer = snd_sgio2audio_pcm_pointer,
6cedf869 673 .page = snd_pcm_lib_get_vmalloc_page,
862c2c0a
TB		 674};
675
915a38d3 676static const struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
862c2c0a
TB		 677 .open = snd_sgio2audio_playback2_open,
678 .close = snd_sgio2audio_pcm_close,
679 .ioctl = snd_pcm_lib_ioctl,
680 .hw_params = snd_sgio2audio_pcm_hw_params,
681 .hw_free = snd_sgio2audio_pcm_hw_free,
682 .prepare = snd_sgio2audio_pcm_prepare,
683 .trigger = snd_sgio2audio_pcm_trigger,
684 .pointer = snd_sgio2audio_pcm_pointer,
6cedf869 685 .page = snd_pcm_lib_get_vmalloc_page,
862c2c0a
TB		 686};
687
915a38d3 688static const struct snd_pcm_ops snd_sgio2audio_capture_ops = {
862c2c0a
TB		 689 .open = snd_sgio2audio_capture_open,
690 .close = snd_sgio2audio_pcm_close,
691 .ioctl = snd_pcm_lib_ioctl,
692 .hw_params = snd_sgio2audio_pcm_hw_params,
693 .hw_free = snd_sgio2audio_pcm_hw_free,
694 .prepare = snd_sgio2audio_pcm_prepare,
695 .trigger = snd_sgio2audio_pcm_trigger,
696 .pointer = snd_sgio2audio_pcm_pointer,
6cedf869 697 .page = snd_pcm_lib_get_vmalloc_page,
862c2c0a
TB		 698};
699
700/*
701 * definitions of capture are omitted here...
702 */
703
704/* create a pcm device */
e0f8cb5f 705static int snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)
862c2c0a
TB		 706{
707 struct snd_pcm *pcm;
708 int err;
709
710 /* create first pcm device with one outputs and one input */
711 err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);
712 if (err < 0)
713 return err;
714
715 pcm->private_data = chip;
716 strcpy(pcm->name, "SGI O2 DAC1");
717
718 /* set operators */
719 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
720 &snd_sgio2audio_playback1_ops);
721 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
722 &snd_sgio2audio_capture_ops);
723
724 /* create second pcm device with one outputs and no input */
725 err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);
726 if (err < 0)
727 return err;
728
729 pcm->private_data = chip;
730 strcpy(pcm->name, "SGI O2 DAC2");
731
732 /* set operators */
733 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
734 &snd_sgio2audio_playback2_ops);
735
736 return 0;
737}
738
739static struct {
740 int idx;
741 int irq;
742 irqreturn_t (*isr)(int, void *);
743 const char *desc;
744} snd_sgio2_isr_table[] = {
745 {
746 .idx = 0,
747 .irq = MACEISA_AUDIO1_DMAT_IRQ,
748 .isr = snd_sgio2audio_dma_in_isr,
749 .desc = "Capture DMA Channel 0"
750 }, {
751 .idx = 0,
752 .irq = MACEISA_AUDIO1_OF_IRQ,
753 .isr = snd_sgio2audio_error_isr,
754 .desc = "Capture Overflow"
755 }, {
756 .idx = 1,
757 .irq = MACEISA_AUDIO2_DMAT_IRQ,
758 .isr = snd_sgio2audio_dma_out_isr,
759 .desc = "Playback DMA Channel 1"
760 }, {
761 .idx = 1,
762 .irq = MACEISA_AUDIO2_MERR_IRQ,
763 .isr = snd_sgio2audio_error_isr,
764 .desc = "Memory Error Channel 1"
765 }, {
766 .idx = 2,
767 .irq = MACEISA_AUDIO3_DMAT_IRQ,
768 .isr = snd_sgio2audio_dma_out_isr,
769 .desc = "Playback DMA Channel 2"
770 }, {
771 .idx = 2,
772 .irq = MACEISA_AUDIO3_MERR_IRQ,
773 .isr = snd_sgio2audio_error_isr,
774 .desc = "Memory Error Channel 2"
775 }
776};
777
778/* ALSA driver */
779
780static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
781{
782 int i;
783
784 /* reset interface */
785 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
786 udelay(1);
787 writeq(0, &mace->perif.audio.control);
788
789 /* release IRQ's */
790 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
791 free_irq(snd_sgio2_isr_table[i].irq,
792 &chip->channel[snd_sgio2_isr_table[i].idx]);
793
6a8125c3 794 dma_free_coherent(chip->card->dev, MACEISA_RINGBUFFERS_SIZE,
862c2c0a
TB		 795 chip->ring_base, chip->ring_base_dma);
796
797 /* release card data */
798 kfree(chip);
799 return 0;
800}
801
802static int snd_sgio2audio_dev_free(struct snd_device *device)
803{
804 struct snd_sgio2audio *chip = device->device_data;
805
806 return snd_sgio2audio_free(chip);
807}
808
809static struct snd_device_ops ops = {
810 .dev_free = snd_sgio2audio_dev_free,
811};
812
e0f8cb5f
BP		 813static int snd_sgio2audio_create(struct snd_card *card,
814 struct snd_sgio2audio **rchip)
862c2c0a
TB		 815{
816 struct snd_sgio2audio *chip;
817 int i, err;
818
819 *rchip = NULL;
820
821 /* check if a codec is attached to the interface */
822 /* (Audio or Audio/Video board present) */
823 if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))
824 return -ENOENT;
825
cdc4398b 826 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
862c2c0a
TB		 827 if (chip == NULL)
828 return -ENOMEM;
829
830 chip->card = card;
831
6a8125c3
CH		 832 chip->ring_base = dma_alloc_coherent(card->dev,
833 MACEISA_RINGBUFFERS_SIZE,
834 &chip->ring_base_dma, GFP_KERNEL);
862c2c0a
TB		 835 if (chip->ring_base == NULL) {
836 printk(KERN_ERR
837 "sgio2audio: could not allocate ring buffers\n");
838 kfree(chip);
839 return -ENOMEM;
840 }
841
842 spin_lock_init(&chip->ad1843_lock);
843
844 /* initialize channels */
845 for (i = 0; i < 3; i++) {
846 spin_lock_init(&chip->channel[i].lock);
847 chip->channel[i].idx = i;
848 }
849
850 /* allocate IRQs */
851 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {
852 if (request_irq(snd_sgio2_isr_table[i].irq,
853 snd_sgio2_isr_table[i].isr,
854 0,
855 snd_sgio2_isr_table[i].desc,
856 &chip->channel[snd_sgio2_isr_table[i].idx])) {
857 snd_sgio2audio_free(chip);
858 printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
859 snd_sgio2_isr_table[i].irq);
860 return -EBUSY;
861 }
862 }
863
864 /* reset the interface */
865 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
866 udelay(1);
867 writeq(0, &mace->perif.audio.control);
868 msleep_interruptible(1); /* give time to recover */
869
870 /* set ring base */
871 writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);
872
873 /* attach the AD1843 codec */
874 chip->ad1843.read = read_ad1843_reg;
875 chip->ad1843.write = write_ad1843_reg;
876 chip->ad1843.chip = chip;
877
878 /* initialize the AD1843 codec */
879 err = ad1843_init(&chip->ad1843);
880 if (err < 0) {
881 snd_sgio2audio_free(chip);
882 return err;
883 }
884
885 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
886 if (err < 0) {
887 snd_sgio2audio_free(chip);
888 return err;
889 }
890 *rchip = chip;
891 return 0;
892}
893
e0f8cb5f 894static int snd_sgio2audio_probe(struct platform_device *pdev)
862c2c0a
TB		 895{
896 struct snd_card *card;
897 struct snd_sgio2audio *chip;
898 int err;
899
bee1bb19 900 err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card);
bd7dd77c
TI		 901 if (err < 0)
902 return err;
862c2c0a
TB		 903
904 err = snd_sgio2audio_create(card, &chip);
905 if (err < 0) {
906 snd_card_free(card);
907 return err;
908 }
862c2c0a
TB		 909
910 err = snd_sgio2audio_new_pcm(chip);
911 if (err < 0) {
912 snd_card_free(card);
913 return err;
914 }
915 err = snd_sgio2audio_new_mixer(chip);
916 if (err < 0) {
917 snd_card_free(card);
918 return err;
919 }
920
921 strcpy(card->driver, "SGI O2 Audio");
922 strcpy(card->shortname, "SGI O2 Audio");
923 sprintf(card->longname, "%s irq %i-%i",
924 card->shortname,
925 MACEISA_AUDIO1_DMAT_IRQ,
926 MACEISA_AUDIO3_MERR_IRQ);
927
928 err = snd_card_register(card);
929 if (err < 0) {
930 snd_card_free(card);
931 return err;
932 }
933 platform_set_drvdata(pdev, card);
934 return 0;
935}
936
e0f8cb5f 937static int snd_sgio2audio_remove(struct platform_device *pdev)
862c2c0a
TB		 938{
939 struct snd_card *card = platform_get_drvdata(pdev);
940
941 snd_card_free(card);
862c2c0a
TB		 942 return 0;
943}
944
945static struct platform_driver sgio2audio_driver = {
946 .probe = snd_sgio2audio_probe,
e0f8cb5f 947 .remove = snd_sgio2audio_remove,
862c2c0a
TB		 948 .driver = {
949 .name = "sgio2audio",
862c2c0a
TB		 950 }
951};
952
51451b8d 953module_platform_driver(sgio2audio_driver);
Linux 6.x block layer and io_uring tree(s)