1
2
3
4
5
6
7
8
9#include <linux/clk.h>
10#include <linux/delay.h>
11#include <linux/dma-mapping.h>
12#include <linux/module.h>
13#include <linux/of_platform.h>
14#include <linux/platform_data/dma-imx.h>
15#include <linux/pm_runtime.h>
16#include <sound/dmaengine_pcm.h>
17#include <sound/pcm_params.h>
18
19#include "fsl_asrc.h"
20
21#define IDEAL_RATIO_DECIMAL_DEPTH 26
22
23#define pair_err(fmt, ...) \
24 dev_err(&asrc_priv->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__)
25
26#define pair_dbg(fmt, ...) \
27 dev_dbg(&asrc_priv->pdev->dev, "Pair %c: " fmt, 'A' + index, ##__VA_ARGS__)
28
29
30static const u8 process_option[][12][2] = {
31
32 {{0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},},
33 {{0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},},
34 {{0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},},
35 {{1, 2}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},},
36 {{1, 2}, {1, 2}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},},
37 {{1, 2}, {2, 1}, {2, 1}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0}, {0, 0},},
38 {{2, 2}, {2, 2}, {2, 1}, {2, 1}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0},},
39 {{2, 2}, {2, 2}, {2, 1}, {2, 1}, {0, 2}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0}, {0, 0},},
40 {{2, 2}, {2, 2}, {2, 2}, {2, 1}, {1, 2}, {0, 2}, {0, 2}, {0, 1}, {0, 1}, {0, 1}, {0, 1}, {0, 0},},
41 {{2, 2}, {2, 2}, {2, 2}, {2, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 1}, {1, 1}, {1, 1}, {1, 1}, {1, 1},},
42 {{2, 2}, {2, 2}, {2, 2}, {2, 2}, {1, 2}, {1, 2}, {1, 2}, {1, 1}, {1, 1}, {1, 1}, {1, 1}, {1, 1},},
43 {{2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 1}, {2, 1}, {2, 1}, {2, 1}, {2, 1},},
44 {{2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 2}, {2, 1}, {2, 1}, {2, 1}, {2, 1}, {2, 1},},
45};
46
47
48static int supported_input_rate[] = {
49 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200,
50 96000, 176400, 192000,
51};
52
53static int supported_asrc_rate[] = {
54 8000, 11025, 16000, 22050, 32000, 44100, 48000, 64000, 88200, 96000, 176400, 192000,
55};
56
57
58
59
60
61static unsigned char input_clk_map_imx35[] = {
62 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
63};
64
65static unsigned char output_clk_map_imx35[] = {
66 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
67};
68
69
70static unsigned char input_clk_map_imx53[] = {
71
72 0x0, 0x1, 0x2, 0x7, 0x4, 0x5, 0x6, 0x3, 0x8, 0x9, 0xa, 0xb, 0xc, 0xf, 0xe, 0xd,
73};
74
75static unsigned char output_clk_map_imx53[] = {
76
77 0x8, 0x9, 0xa, 0x7, 0xc, 0x5, 0x6, 0xb, 0x0, 0x1, 0x2, 0x3, 0x4, 0xf, 0xe, 0xd,
78};
79
80static unsigned char *clk_map[2];
81
82
83
84
85
86
87
88
89static int fsl_asrc_request_pair(int channels, struct fsl_asrc_pair *pair)
90{
91 enum asrc_pair_index index = ASRC_INVALID_PAIR;
92 struct fsl_asrc *asrc_priv = pair->asrc_priv;
93 struct device *dev = &asrc_priv->pdev->dev;
94 unsigned long lock_flags;
95 int i, ret = 0;
96
97 spin_lock_irqsave(&asrc_priv->lock, lock_flags);
98
99 for (i = ASRC_PAIR_A; i < ASRC_PAIR_MAX_NUM; i++) {
100 if (asrc_priv->pair[i] != NULL)
101 continue;
102
103 index = i;
104
105 if (i != ASRC_PAIR_B)
106 break;
107 }
108
109 if (index == ASRC_INVALID_PAIR) {
110 dev_err(dev, "all pairs are busy now\n");
111 ret = -EBUSY;
112 } else if (asrc_priv->channel_avail < channels) {
113 dev_err(dev, "can't afford required channels: %d\n", channels);
114 ret = -EINVAL;
115 } else {
116 asrc_priv->channel_avail -= channels;
117 asrc_priv->pair[index] = pair;
118 pair->channels = channels;
119 pair->index = index;
120 }
121
122 spin_unlock_irqrestore(&asrc_priv->lock, lock_flags);
123
124 return ret;
125}
126
127
128
129
130
131
132static void fsl_asrc_release_pair(struct fsl_asrc_pair *pair)
133{
134 struct fsl_asrc *asrc_priv = pair->asrc_priv;
135 enum asrc_pair_index index = pair->index;
136 unsigned long lock_flags;
137
138
139 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
140 ASRCTR_ASRCEi_MASK(index), 0);
141
142 spin_lock_irqsave(&asrc_priv->lock, lock_flags);
143
144 asrc_priv->channel_avail += pair->channels;
145 asrc_priv->pair[index] = NULL;
146 pair->error = 0;
147
148 spin_unlock_irqrestore(&asrc_priv->lock, lock_flags);
149}
150
151
152
153
154static void fsl_asrc_set_watermarks(struct fsl_asrc_pair *pair, u32 in, u32 out)
155{
156 struct fsl_asrc *asrc_priv = pair->asrc_priv;
157 enum asrc_pair_index index = pair->index;
158
159 regmap_update_bits(asrc_priv->regmap, REG_ASRMCR(index),
160 ASRMCRi_EXTTHRSHi_MASK |
161 ASRMCRi_INFIFO_THRESHOLD_MASK |
162 ASRMCRi_OUTFIFO_THRESHOLD_MASK,
163 ASRMCRi_EXTTHRSHi |
164 ASRMCRi_INFIFO_THRESHOLD(in) |
165 ASRMCRi_OUTFIFO_THRESHOLD(out));
166}
167
168
169
170
171
172
173static u32 fsl_asrc_cal_asrck_divisor(struct fsl_asrc_pair *pair, u32 div)
174{
175 u32 ps;
176
177
178 for (ps = 0; div > 8; ps++)
179 div >>= 1;
180
181 return ((div - 1) << ASRCDRi_AxCPi_WIDTH) | ps;
182}
183
184
185
186
187
188
189static int fsl_asrc_set_ideal_ratio(struct fsl_asrc_pair *pair,
190 int inrate, int outrate)
191{
192 struct fsl_asrc *asrc_priv = pair->asrc_priv;
193 enum asrc_pair_index index = pair->index;
194 unsigned long ratio;
195 int i;
196
197 if (!outrate) {
198 pair_err("output rate should not be zero\n");
199 return -EINVAL;
200 }
201
202
203 ratio = (inrate / outrate) << IDEAL_RATIO_DECIMAL_DEPTH;
204
205
206 inrate %= outrate;
207
208 for (i = 1; i <= IDEAL_RATIO_DECIMAL_DEPTH; i++) {
209 inrate <<= 1;
210
211 if (inrate < outrate)
212 continue;
213
214 ratio |= 1 << (IDEAL_RATIO_DECIMAL_DEPTH - i);
215 inrate -= outrate;
216
217 if (!inrate)
218 break;
219 }
220
221 regmap_write(asrc_priv->regmap, REG_ASRIDRL(index), ratio);
222 regmap_write(asrc_priv->regmap, REG_ASRIDRH(index), ratio >> 24);
223
224 return 0;
225}
226
227
228
229
230
231
232
233
234static int fsl_asrc_config_pair(struct fsl_asrc_pair *pair)
235{
236 struct asrc_config *config = pair->config;
237 struct fsl_asrc *asrc_priv = pair->asrc_priv;
238 enum asrc_pair_index index = pair->index;
239 u32 inrate, outrate, indiv, outdiv;
240 u32 clk_index[2], div[2];
241 int in, out, channels;
242 struct clk *clk;
243 bool ideal;
244
245 if (!config) {
246 pair_err("invalid pair config\n");
247 return -EINVAL;
248 }
249
250
251 if (config->channel_num < 1 || config->channel_num > 10) {
252 pair_err("does not support %d channels\n", config->channel_num);
253 return -EINVAL;
254 }
255
256
257 if (config->output_word_width == ASRC_WIDTH_8_BIT) {
258 pair_err("does not support 8bit width output\n");
259 return -EINVAL;
260 }
261
262 inrate = config->input_sample_rate;
263 outrate = config->output_sample_rate;
264 ideal = config->inclk == INCLK_NONE;
265
266
267 for (in = 0; in < ARRAY_SIZE(supported_input_rate); in++)
268 if (inrate == supported_input_rate[in])
269 break;
270
271 if (in == ARRAY_SIZE(supported_input_rate)) {
272 pair_err("unsupported input sample rate: %dHz\n", inrate);
273 return -EINVAL;
274 }
275
276 for (out = 0; out < ARRAY_SIZE(supported_asrc_rate); out++)
277 if (outrate == supported_asrc_rate[out])
278 break;
279
280 if (out == ARRAY_SIZE(supported_asrc_rate)) {
281 pair_err("unsupported output sample rate: %dHz\n", outrate);
282 return -EINVAL;
283 }
284
285 if ((outrate >= 8000 && outrate <= 30000) &&
286 (outrate > 24 * inrate || inrate > 8 * outrate)) {
287 pair_err("exceed supported ratio range [1/24, 8] for \
288 inrate/outrate: %d/%d\n", inrate, outrate);
289 return -EINVAL;
290 }
291
292
293 clk_index[IN] = clk_map[IN][config->inclk];
294 clk_index[OUT] = clk_map[OUT][config->outclk];
295
296
297 clk = asrc_priv->asrck_clk[clk_index[ideal ? OUT : IN]];
298
299 div[IN] = clk_get_rate(clk) / inrate;
300 if (div[IN] == 0) {
301 pair_err("failed to support input sample rate %dHz by asrck_%x\n",
302 inrate, clk_index[ideal ? OUT : IN]);
303 return -EINVAL;
304 }
305
306 clk = asrc_priv->asrck_clk[clk_index[OUT]];
307
308
309 if (ideal)
310 div[OUT] = clk_get_rate(clk) / IDEAL_RATIO_RATE;
311 else
312 div[OUT] = clk_get_rate(clk) / outrate;
313
314 if (div[OUT] == 0) {
315 pair_err("failed to support output sample rate %dHz by asrck_%x\n",
316 outrate, clk_index[OUT]);
317 return -EINVAL;
318 }
319
320
321 channels = config->channel_num;
322
323 if (asrc_priv->channel_bits < 4)
324 channels /= 2;
325
326
327 regmap_update_bits(asrc_priv->regmap, REG_ASRCNCR,
328 ASRCNCR_ANCi_MASK(index, asrc_priv->channel_bits),
329 ASRCNCR_ANCi(index, channels, asrc_priv->channel_bits));
330
331
332 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
333 ASRCTR_ATSi_MASK(index), ASRCTR_ATS(index));
334 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
335 ASRCTR_USRi_MASK(index), 0);
336
337
338 regmap_update_bits(asrc_priv->regmap, REG_ASRCSR,
339 ASRCSR_AICSi_MASK(index) | ASRCSR_AOCSi_MASK(index),
340 ASRCSR_AICS(index, clk_index[IN]) |
341 ASRCSR_AOCS(index, clk_index[OUT]));
342
343
344 indiv = fsl_asrc_cal_asrck_divisor(pair, div[IN]);
345 outdiv = fsl_asrc_cal_asrck_divisor(pair, div[OUT]);
346
347
348 regmap_update_bits(asrc_priv->regmap, REG_ASRCDR(index),
349 ASRCDRi_AOCPi_MASK(index) | ASRCDRi_AICPi_MASK(index) |
350 ASRCDRi_AOCDi_MASK(index) | ASRCDRi_AICDi_MASK(index),
351 ASRCDRi_AOCP(index, outdiv) | ASRCDRi_AICP(index, indiv));
352
353
354 regmap_update_bits(asrc_priv->regmap, REG_ASRMCR1(index),
355 ASRMCR1i_OW16_MASK | ASRMCR1i_IWD_MASK,
356 ASRMCR1i_OW16(config->output_word_width) |
357 ASRMCR1i_IWD(config->input_word_width));
358
359
360 regmap_update_bits(asrc_priv->regmap, REG_ASRMCR(index),
361 ASRMCRi_BUFSTALLi_MASK, ASRMCRi_BUFSTALLi);
362
363
364 fsl_asrc_set_watermarks(pair, ASRC_INPUTFIFO_THRESHOLD,
365 ASRC_INPUTFIFO_THRESHOLD);
366
367
368 if (!ideal)
369 return 0;
370
371
372 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
373 ASRCTR_ATSi_MASK(index), 0);
374
375
376 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
377 ASRCTR_IDRi_MASK(index) | ASRCTR_USRi_MASK(index),
378 ASRCTR_IDR(index) | ASRCTR_USR(index));
379
380
381 regmap_update_bits(asrc_priv->regmap, REG_ASRCFG,
382 ASRCFG_PREMODi_MASK(index) | ASRCFG_POSTMODi_MASK(index),
383 ASRCFG_PREMOD(index, process_option[in][out][0]) |
384 ASRCFG_POSTMOD(index, process_option[in][out][1]));
385
386 return fsl_asrc_set_ideal_ratio(pair, inrate, outrate);
387}
388
389
390
391
392
393
394static void fsl_asrc_start_pair(struct fsl_asrc_pair *pair)
395{
396 struct fsl_asrc *asrc_priv = pair->asrc_priv;
397 enum asrc_pair_index index = pair->index;
398 int reg, retry = 10, i;
399
400
401 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
402 ASRCTR_ASRCEi_MASK(index), ASRCTR_ASRCE(index));
403
404
405 do {
406 udelay(5);
407 regmap_read(asrc_priv->regmap, REG_ASRCFG, ®);
408 reg &= ASRCFG_INIRQi_MASK(index);
409 } while (!reg && --retry);
410
411
412 regmap_read(asrc_priv->regmap, REG_ASRCNCR, ®);
413 for (i = 0; i < pair->channels * 4; i++)
414 regmap_write(asrc_priv->regmap, REG_ASRDI(index), 0);
415
416
417 regmap_write(asrc_priv->regmap, REG_ASRIER, ASRIER_AOLIE);
418}
419
420
421
422
423static void fsl_asrc_stop_pair(struct fsl_asrc_pair *pair)
424{
425 struct fsl_asrc *asrc_priv = pair->asrc_priv;
426 enum asrc_pair_index index = pair->index;
427
428
429 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
430 ASRCTR_ASRCEi_MASK(index), 0);
431}
432
433
434
435
436struct dma_chan *fsl_asrc_get_dma_channel(struct fsl_asrc_pair *pair, bool dir)
437{
438 struct fsl_asrc *asrc_priv = pair->asrc_priv;
439 enum asrc_pair_index index = pair->index;
440 char name[4];
441
442 sprintf(name, "%cx%c", dir == IN ? 'r' : 't', index + 'a');
443
444 return dma_request_slave_channel(&asrc_priv->pdev->dev, name);
445}
446EXPORT_SYMBOL_GPL(fsl_asrc_get_dma_channel);
447
448static int fsl_asrc_dai_startup(struct snd_pcm_substream *substream,
449 struct snd_soc_dai *dai)
450{
451 struct fsl_asrc *asrc_priv = snd_soc_dai_get_drvdata(dai);
452
453
454 if (asrc_priv->channel_bits == 3)
455 snd_pcm_hw_constraint_step(substream->runtime, 0,
456 SNDRV_PCM_HW_PARAM_CHANNELS, 2);
457
458 return 0;
459}
460
461static int fsl_asrc_dai_hw_params(struct snd_pcm_substream *substream,
462 struct snd_pcm_hw_params *params,
463 struct snd_soc_dai *dai)
464{
465 struct fsl_asrc *asrc_priv = snd_soc_dai_get_drvdata(dai);
466 int width = params_width(params);
467 struct snd_pcm_runtime *runtime = substream->runtime;
468 struct fsl_asrc_pair *pair = runtime->private_data;
469 unsigned int channels = params_channels(params);
470 unsigned int rate = params_rate(params);
471 struct asrc_config config;
472 int word_width, ret;
473
474 ret = fsl_asrc_request_pair(channels, pair);
475 if (ret) {
476 dev_err(dai->dev, "fail to request asrc pair\n");
477 return ret;
478 }
479
480 pair->config = &config;
481
482 if (width == 16)
483 width = ASRC_WIDTH_16_BIT;
484 else
485 width = ASRC_WIDTH_24_BIT;
486
487 if (asrc_priv->asrc_width == 16)
488 word_width = ASRC_WIDTH_16_BIT;
489 else
490 word_width = ASRC_WIDTH_24_BIT;
491
492 config.pair = pair->index;
493 config.channel_num = channels;
494 config.inclk = INCLK_NONE;
495 config.outclk = OUTCLK_ASRCK1_CLK;
496
497 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
498 config.input_word_width = width;
499 config.output_word_width = word_width;
500 config.input_sample_rate = rate;
501 config.output_sample_rate = asrc_priv->asrc_rate;
502 } else {
503 config.input_word_width = word_width;
504 config.output_word_width = width;
505 config.input_sample_rate = asrc_priv->asrc_rate;
506 config.output_sample_rate = rate;
507 }
508
509 ret = fsl_asrc_config_pair(pair);
510 if (ret) {
511 dev_err(dai->dev, "fail to config asrc pair\n");
512 return ret;
513 }
514
515 return 0;
516}
517
518static int fsl_asrc_dai_hw_free(struct snd_pcm_substream *substream,
519 struct snd_soc_dai *dai)
520{
521 struct snd_pcm_runtime *runtime = substream->runtime;
522 struct fsl_asrc_pair *pair = runtime->private_data;
523
524 if (pair)
525 fsl_asrc_release_pair(pair);
526
527 return 0;
528}
529
530static int fsl_asrc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
531 struct snd_soc_dai *dai)
532{
533 struct snd_pcm_runtime *runtime = substream->runtime;
534 struct fsl_asrc_pair *pair = runtime->private_data;
535
536 switch (cmd) {
537 case SNDRV_PCM_TRIGGER_START:
538 case SNDRV_PCM_TRIGGER_RESUME:
539 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
540 fsl_asrc_start_pair(pair);
541 break;
542 case SNDRV_PCM_TRIGGER_STOP:
543 case SNDRV_PCM_TRIGGER_SUSPEND:
544 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
545 fsl_asrc_stop_pair(pair);
546 break;
547 default:
548 return -EINVAL;
549 }
550
551 return 0;
552}
553
554static const struct snd_soc_dai_ops fsl_asrc_dai_ops = {
555 .startup = fsl_asrc_dai_startup,
556 .hw_params = fsl_asrc_dai_hw_params,
557 .hw_free = fsl_asrc_dai_hw_free,
558 .trigger = fsl_asrc_dai_trigger,
559};
560
561static int fsl_asrc_dai_probe(struct snd_soc_dai *dai)
562{
563 struct fsl_asrc *asrc_priv = snd_soc_dai_get_drvdata(dai);
564
565 snd_soc_dai_init_dma_data(dai, &asrc_priv->dma_params_tx,
566 &asrc_priv->dma_params_rx);
567
568 return 0;
569}
570
571#define FSL_ASRC_RATES SNDRV_PCM_RATE_8000_192000
572#define FSL_ASRC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \
573 SNDRV_PCM_FMTBIT_S16_LE | \
574 SNDRV_PCM_FMTBIT_S20_3LE)
575
576static struct snd_soc_dai_driver fsl_asrc_dai = {
577 .probe = fsl_asrc_dai_probe,
578 .playback = {
579 .stream_name = "ASRC-Playback",
580 .channels_min = 1,
581 .channels_max = 10,
582 .rates = FSL_ASRC_RATES,
583 .formats = FSL_ASRC_FORMATS,
584 },
585 .capture = {
586 .stream_name = "ASRC-Capture",
587 .channels_min = 1,
588 .channels_max = 10,
589 .rates = FSL_ASRC_RATES,
590 .formats = FSL_ASRC_FORMATS,
591 },
592 .ops = &fsl_asrc_dai_ops,
593};
594
595static bool fsl_asrc_readable_reg(struct device *dev, unsigned int reg)
596{
597 switch (reg) {
598 case REG_ASRCTR:
599 case REG_ASRIER:
600 case REG_ASRCNCR:
601 case REG_ASRCFG:
602 case REG_ASRCSR:
603 case REG_ASRCDR1:
604 case REG_ASRCDR2:
605 case REG_ASRSTR:
606 case REG_ASRPM1:
607 case REG_ASRPM2:
608 case REG_ASRPM3:
609 case REG_ASRPM4:
610 case REG_ASRPM5:
611 case REG_ASRTFR1:
612 case REG_ASRCCR:
613 case REG_ASRDOA:
614 case REG_ASRDOB:
615 case REG_ASRDOC:
616 case REG_ASRIDRHA:
617 case REG_ASRIDRLA:
618 case REG_ASRIDRHB:
619 case REG_ASRIDRLB:
620 case REG_ASRIDRHC:
621 case REG_ASRIDRLC:
622 case REG_ASR76K:
623 case REG_ASR56K:
624 case REG_ASRMCRA:
625 case REG_ASRFSTA:
626 case REG_ASRMCRB:
627 case REG_ASRFSTB:
628 case REG_ASRMCRC:
629 case REG_ASRFSTC:
630 case REG_ASRMCR1A:
631 case REG_ASRMCR1B:
632 case REG_ASRMCR1C:
633 return true;
634 default:
635 return false;
636 }
637}
638
639static bool fsl_asrc_volatile_reg(struct device *dev, unsigned int reg)
640{
641 switch (reg) {
642 case REG_ASRSTR:
643 case REG_ASRDIA:
644 case REG_ASRDIB:
645 case REG_ASRDIC:
646 case REG_ASRDOA:
647 case REG_ASRDOB:
648 case REG_ASRDOC:
649 case REG_ASRFSTA:
650 case REG_ASRFSTB:
651 case REG_ASRFSTC:
652 case REG_ASRCFG:
653 return true;
654 default:
655 return false;
656 }
657}
658
659static bool fsl_asrc_writeable_reg(struct device *dev, unsigned int reg)
660{
661 switch (reg) {
662 case REG_ASRCTR:
663 case REG_ASRIER:
664 case REG_ASRCNCR:
665 case REG_ASRCFG:
666 case REG_ASRCSR:
667 case REG_ASRCDR1:
668 case REG_ASRCDR2:
669 case REG_ASRSTR:
670 case REG_ASRPM1:
671 case REG_ASRPM2:
672 case REG_ASRPM3:
673 case REG_ASRPM4:
674 case REG_ASRPM5:
675 case REG_ASRTFR1:
676 case REG_ASRCCR:
677 case REG_ASRDIA:
678 case REG_ASRDIB:
679 case REG_ASRDIC:
680 case REG_ASRIDRHA:
681 case REG_ASRIDRLA:
682 case REG_ASRIDRHB:
683 case REG_ASRIDRLB:
684 case REG_ASRIDRHC:
685 case REG_ASRIDRLC:
686 case REG_ASR76K:
687 case REG_ASR56K:
688 case REG_ASRMCRA:
689 case REG_ASRMCRB:
690 case REG_ASRMCRC:
691 case REG_ASRMCR1A:
692 case REG_ASRMCR1B:
693 case REG_ASRMCR1C:
694 return true;
695 default:
696 return false;
697 }
698}
699
700static struct reg_default fsl_asrc_reg[] = {
701 { REG_ASRCTR, 0x0000 }, { REG_ASRIER, 0x0000 },
702 { REG_ASRCNCR, 0x0000 }, { REG_ASRCFG, 0x0000 },
703 { REG_ASRCSR, 0x0000 }, { REG_ASRCDR1, 0x0000 },
704 { REG_ASRCDR2, 0x0000 }, { REG_ASRSTR, 0x0000 },
705 { REG_ASRRA, 0x0000 }, { REG_ASRRB, 0x0000 },
706 { REG_ASRRC, 0x0000 }, { REG_ASRPM1, 0x0000 },
707 { REG_ASRPM2, 0x0000 }, { REG_ASRPM3, 0x0000 },
708 { REG_ASRPM4, 0x0000 }, { REG_ASRPM5, 0x0000 },
709 { REG_ASRTFR1, 0x0000 }, { REG_ASRCCR, 0x0000 },
710 { REG_ASRDIA, 0x0000 }, { REG_ASRDOA, 0x0000 },
711 { REG_ASRDIB, 0x0000 }, { REG_ASRDOB, 0x0000 },
712 { REG_ASRDIC, 0x0000 }, { REG_ASRDOC, 0x0000 },
713 { REG_ASRIDRHA, 0x0000 }, { REG_ASRIDRLA, 0x0000 },
714 { REG_ASRIDRHB, 0x0000 }, { REG_ASRIDRLB, 0x0000 },
715 { REG_ASRIDRHC, 0x0000 }, { REG_ASRIDRLC, 0x0000 },
716 { REG_ASR76K, 0x0A47 }, { REG_ASR56K, 0x0DF3 },
717 { REG_ASRMCRA, 0x0000 }, { REG_ASRFSTA, 0x0000 },
718 { REG_ASRMCRB, 0x0000 }, { REG_ASRFSTB, 0x0000 },
719 { REG_ASRMCRC, 0x0000 }, { REG_ASRFSTC, 0x0000 },
720 { REG_ASRMCR1A, 0x0000 }, { REG_ASRMCR1B, 0x0000 },
721 { REG_ASRMCR1C, 0x0000 },
722};
723
724static const struct regmap_config fsl_asrc_regmap_config = {
725 .reg_bits = 32,
726 .reg_stride = 4,
727 .val_bits = 32,
728
729 .max_register = REG_ASRMCR1C,
730 .reg_defaults = fsl_asrc_reg,
731 .num_reg_defaults = ARRAY_SIZE(fsl_asrc_reg),
732 .readable_reg = fsl_asrc_readable_reg,
733 .volatile_reg = fsl_asrc_volatile_reg,
734 .writeable_reg = fsl_asrc_writeable_reg,
735 .cache_type = REGCACHE_FLAT,
736};
737
738
739
740
741static int fsl_asrc_init(struct fsl_asrc *asrc_priv)
742{
743
744 regmap_write(asrc_priv->regmap, REG_ASRCTR, ASRCTR_ASRCEN);
745
746
747 regmap_write(asrc_priv->regmap, REG_ASRIER, 0x0);
748
749
750 regmap_write(asrc_priv->regmap, REG_ASRPM1, 0x7fffff);
751 regmap_write(asrc_priv->regmap, REG_ASRPM2, 0x255555);
752 regmap_write(asrc_priv->regmap, REG_ASRPM3, 0xff7280);
753 regmap_write(asrc_priv->regmap, REG_ASRPM4, 0xff7280);
754 regmap_write(asrc_priv->regmap, REG_ASRPM5, 0xff7280);
755
756
757 regmap_update_bits(asrc_priv->regmap, REG_ASRTFR1,
758 ASRTFR1_TF_BASE_MASK, ASRTFR1_TF_BASE(0xfc));
759
760
761 regmap_write(asrc_priv->regmap, REG_ASR76K, 0x06D6);
762
763
764 return regmap_write(asrc_priv->regmap, REG_ASR56K, 0x0947);
765}
766
767
768
769
770static irqreturn_t fsl_asrc_isr(int irq, void *dev_id)
771{
772 struct fsl_asrc *asrc_priv = (struct fsl_asrc *)dev_id;
773 struct device *dev = &asrc_priv->pdev->dev;
774 enum asrc_pair_index index;
775 u32 status;
776
777 regmap_read(asrc_priv->regmap, REG_ASRSTR, &status);
778
779
780 regmap_write(asrc_priv->regmap, REG_ASRSTR, ASRSTR_AOLE);
781
782
783
784
785
786
787 for (index = ASRC_PAIR_A; index < ASRC_PAIR_MAX_NUM; index++) {
788 if (!asrc_priv->pair[index])
789 continue;
790
791 if (status & ASRSTR_ATQOL) {
792 asrc_priv->pair[index]->error |= ASRC_TASK_Q_OVERLOAD;
793 dev_dbg(dev, "ASRC Task Queue FIFO overload\n");
794 }
795
796 if (status & ASRSTR_AOOL(index)) {
797 asrc_priv->pair[index]->error |= ASRC_OUTPUT_TASK_OVERLOAD;
798 pair_dbg("Output Task Overload\n");
799 }
800
801 if (status & ASRSTR_AIOL(index)) {
802 asrc_priv->pair[index]->error |= ASRC_INPUT_TASK_OVERLOAD;
803 pair_dbg("Input Task Overload\n");
804 }
805
806 if (status & ASRSTR_AODO(index)) {
807 asrc_priv->pair[index]->error |= ASRC_OUTPUT_BUFFER_OVERFLOW;
808 pair_dbg("Output Data Buffer has overflowed\n");
809 }
810
811 if (status & ASRSTR_AIDU(index)) {
812 asrc_priv->pair[index]->error |= ASRC_INPUT_BUFFER_UNDERRUN;
813 pair_dbg("Input Data Buffer has underflowed\n");
814 }
815 }
816
817 return IRQ_HANDLED;
818}
819
820static int fsl_asrc_probe(struct platform_device *pdev)
821{
822 struct device_node *np = pdev->dev.of_node;
823 struct fsl_asrc *asrc_priv;
824 struct resource *res;
825 void __iomem *regs;
826 int irq, ret, i;
827 char tmp[16];
828
829 asrc_priv = devm_kzalloc(&pdev->dev, sizeof(*asrc_priv), GFP_KERNEL);
830 if (!asrc_priv)
831 return -ENOMEM;
832
833 asrc_priv->pdev = pdev;
834
835
836 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
837 regs = devm_ioremap_resource(&pdev->dev, res);
838 if (IS_ERR(regs))
839 return PTR_ERR(regs);
840
841 asrc_priv->paddr = res->start;
842
843 asrc_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "mem", regs,
844 &fsl_asrc_regmap_config);
845 if (IS_ERR(asrc_priv->regmap)) {
846 dev_err(&pdev->dev, "failed to init regmap\n");
847 return PTR_ERR(asrc_priv->regmap);
848 }
849
850 irq = platform_get_irq(pdev, 0);
851 if (irq < 0) {
852 dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
853 return irq;
854 }
855
856 ret = devm_request_irq(&pdev->dev, irq, fsl_asrc_isr, 0,
857 dev_name(&pdev->dev), asrc_priv);
858 if (ret) {
859 dev_err(&pdev->dev, "failed to claim irq %u: %d\n", irq, ret);
860 return ret;
861 }
862
863 asrc_priv->mem_clk = devm_clk_get(&pdev->dev, "mem");
864 if (IS_ERR(asrc_priv->mem_clk)) {
865 dev_err(&pdev->dev, "failed to get mem clock\n");
866 return PTR_ERR(asrc_priv->mem_clk);
867 }
868
869 asrc_priv->ipg_clk = devm_clk_get(&pdev->dev, "ipg");
870 if (IS_ERR(asrc_priv->ipg_clk)) {
871 dev_err(&pdev->dev, "failed to get ipg clock\n");
872 return PTR_ERR(asrc_priv->ipg_clk);
873 }
874
875 asrc_priv->spba_clk = devm_clk_get(&pdev->dev, "spba");
876 if (IS_ERR(asrc_priv->spba_clk))
877 dev_warn(&pdev->dev, "failed to get spba clock\n");
878
879 for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
880 sprintf(tmp, "asrck_%x", i);
881 asrc_priv->asrck_clk[i] = devm_clk_get(&pdev->dev, tmp);
882 if (IS_ERR(asrc_priv->asrck_clk[i])) {
883 dev_err(&pdev->dev, "failed to get %s clock\n", tmp);
884 return PTR_ERR(asrc_priv->asrck_clk[i]);
885 }
886 }
887
888 if (of_device_is_compatible(np, "fsl,imx35-asrc")) {
889 asrc_priv->channel_bits = 3;
890 clk_map[IN] = input_clk_map_imx35;
891 clk_map[OUT] = output_clk_map_imx35;
892 } else {
893 asrc_priv->channel_bits = 4;
894 clk_map[IN] = input_clk_map_imx53;
895 clk_map[OUT] = output_clk_map_imx53;
896 }
897
898 ret = fsl_asrc_init(asrc_priv);
899 if (ret) {
900 dev_err(&pdev->dev, "failed to init asrc %d\n", ret);
901 return ret;
902 }
903
904 asrc_priv->channel_avail = 10;
905
906 ret = of_property_read_u32(np, "fsl,asrc-rate",
907 &asrc_priv->asrc_rate);
908 if (ret) {
909 dev_err(&pdev->dev, "failed to get output rate\n");
910 return ret;
911 }
912
913 ret = of_property_read_u32(np, "fsl,asrc-width",
914 &asrc_priv->asrc_width);
915 if (ret) {
916 dev_err(&pdev->dev, "failed to get output width\n");
917 return ret;
918 }
919
920 if (asrc_priv->asrc_width != 16 && asrc_priv->asrc_width != 24) {
921 dev_warn(&pdev->dev, "unsupported width, switching to 24bit\n");
922 asrc_priv->asrc_width = 24;
923 }
924
925 platform_set_drvdata(pdev, asrc_priv);
926 pm_runtime_enable(&pdev->dev);
927 spin_lock_init(&asrc_priv->lock);
928
929 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_asrc_component,
930 &fsl_asrc_dai, 1);
931 if (ret) {
932 dev_err(&pdev->dev, "failed to register ASoC DAI\n");
933 return ret;
934 }
935
936 return 0;
937}
938
939#ifdef CONFIG_PM
940static int fsl_asrc_runtime_resume(struct device *dev)
941{
942 struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
943 int i, ret;
944
945 ret = clk_prepare_enable(asrc_priv->mem_clk);
946 if (ret)
947 return ret;
948 ret = clk_prepare_enable(asrc_priv->ipg_clk);
949 if (ret)
950 goto disable_mem_clk;
951 if (!IS_ERR(asrc_priv->spba_clk)) {
952 ret = clk_prepare_enable(asrc_priv->spba_clk);
953 if (ret)
954 goto disable_ipg_clk;
955 }
956 for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
957 ret = clk_prepare_enable(asrc_priv->asrck_clk[i]);
958 if (ret)
959 goto disable_asrck_clk;
960 }
961
962 return 0;
963
964disable_asrck_clk:
965 for (i--; i >= 0; i--)
966 clk_disable_unprepare(asrc_priv->asrck_clk[i]);
967 if (!IS_ERR(asrc_priv->spba_clk))
968 clk_disable_unprepare(asrc_priv->spba_clk);
969disable_ipg_clk:
970 clk_disable_unprepare(asrc_priv->ipg_clk);
971disable_mem_clk:
972 clk_disable_unprepare(asrc_priv->mem_clk);
973 return ret;
974}
975
976static int fsl_asrc_runtime_suspend(struct device *dev)
977{
978 struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
979 int i;
980
981 for (i = 0; i < ASRC_CLK_MAX_NUM; i++)
982 clk_disable_unprepare(asrc_priv->asrck_clk[i]);
983 if (!IS_ERR(asrc_priv->spba_clk))
984 clk_disable_unprepare(asrc_priv->spba_clk);
985 clk_disable_unprepare(asrc_priv->ipg_clk);
986 clk_disable_unprepare(asrc_priv->mem_clk);
987
988 return 0;
989}
990#endif
991
992#ifdef CONFIG_PM_SLEEP
993static int fsl_asrc_suspend(struct device *dev)
994{
995 struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
996
997 regmap_read(asrc_priv->regmap, REG_ASRCFG,
998 &asrc_priv->regcache_cfg);
999
1000 regcache_cache_only(asrc_priv->regmap, true);
1001 regcache_mark_dirty(asrc_priv->regmap);
1002
1003 return 0;
1004}
1005
1006static int fsl_asrc_resume(struct device *dev)
1007{
1008 struct fsl_asrc *asrc_priv = dev_get_drvdata(dev);
1009 u32 asrctr;
1010
1011
1012 regmap_read(asrc_priv->regmap, REG_ASRCTR, &asrctr);
1013 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
1014 ASRCTR_ASRCEi_ALL_MASK, 0);
1015
1016
1017 regcache_cache_only(asrc_priv->regmap, false);
1018 regcache_sync(asrc_priv->regmap);
1019
1020 regmap_update_bits(asrc_priv->regmap, REG_ASRCFG,
1021 ASRCFG_NDPRi_ALL_MASK | ASRCFG_POSTMODi_ALL_MASK |
1022 ASRCFG_PREMODi_ALL_MASK, asrc_priv->regcache_cfg);
1023
1024
1025 regmap_update_bits(asrc_priv->regmap, REG_ASRCTR,
1026 ASRCTR_ASRCEi_ALL_MASK, asrctr);
1027
1028 return 0;
1029}
1030#endif
1031
1032static const struct dev_pm_ops fsl_asrc_pm = {
1033 SET_RUNTIME_PM_OPS(fsl_asrc_runtime_suspend, fsl_asrc_runtime_resume, NULL)
1034 SET_SYSTEM_SLEEP_PM_OPS(fsl_asrc_suspend, fsl_asrc_resume)
1035};
1036
1037static const struct of_device_id fsl_asrc_ids[] = {
1038 { .compatible = "fsl,imx35-asrc", },
1039 { .compatible = "fsl,imx53-asrc", },
1040 {}
1041};
1042MODULE_DEVICE_TABLE(of, fsl_asrc_ids);
1043
1044static struct platform_driver fsl_asrc_driver = {
1045 .probe = fsl_asrc_probe,
1046 .driver = {
1047 .name = "fsl-asrc",
1048 .of_match_table = fsl_asrc_ids,
1049 .pm = &fsl_asrc_pm,
1050 },
1051};
1052module_platform_driver(fsl_asrc_driver);
1053
1054MODULE_DESCRIPTION("Freescale ASRC ASoC driver");
1055MODULE_AUTHOR("Nicolin Chen <nicoleotsuka@gmail.com>");
1056MODULE_ALIAS("platform:fsl-asrc");
1057MODULE_LICENSE("GPL v2");
1058
