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