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7#include <linux/clk.h>
8#include <linux/dmaengine.h>
9#include <linux/module.h>
10#include <linux/of_irq.h>
11#include <linux/of_platform.h>
12#include <linux/pm_runtime.h>
13#include <sound/dmaengine_pcm.h>
14#include <sound/pcm_params.h>
15
16#include "fsl_esai.h"
17#include "imx-pcm.h"
18
19#define FSL_ESAI_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
20 SNDRV_PCM_FMTBIT_S16_LE | \
21 SNDRV_PCM_FMTBIT_S20_3LE | \
22 SNDRV_PCM_FMTBIT_S24_LE)
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46struct fsl_esai {
47 struct snd_dmaengine_dai_dma_data dma_params_rx;
48 struct snd_dmaengine_dai_dma_data dma_params_tx;
49 struct platform_device *pdev;
50 struct regmap *regmap;
51 struct clk *coreclk;
52 struct clk *extalclk;
53 struct clk *fsysclk;
54 struct clk *spbaclk;
55 u32 fifo_depth;
56 u32 slot_width;
57 u32 slots;
58 u32 tx_mask;
59 u32 rx_mask;
60 u32 hck_rate[2];
61 u32 sck_rate[2];
62 bool hck_dir[2];
63 bool sck_div[2];
64 bool slave_mode;
65 bool synchronous;
66 char name[32];
67};
68
69static irqreturn_t esai_isr(int irq, void *devid)
70{
71 struct fsl_esai *esai_priv = (struct fsl_esai *)devid;
72 struct platform_device *pdev = esai_priv->pdev;
73 u32 esr;
74
75 regmap_read(esai_priv->regmap, REG_ESAI_ESR, &esr);
76
77 if (esr & ESAI_ESR_TINIT_MASK)
78 dev_dbg(&pdev->dev, "isr: Transmission Initialized\n");
79
80 if (esr & ESAI_ESR_RFF_MASK)
81 dev_warn(&pdev->dev, "isr: Receiving overrun\n");
82
83 if (esr & ESAI_ESR_TFE_MASK)
84 dev_warn(&pdev->dev, "isr: Transmission underrun\n");
85
86 if (esr & ESAI_ESR_TLS_MASK)
87 dev_dbg(&pdev->dev, "isr: Just transmitted the last slot\n");
88
89 if (esr & ESAI_ESR_TDE_MASK)
90 dev_dbg(&pdev->dev, "isr: Transmission data exception\n");
91
92 if (esr & ESAI_ESR_TED_MASK)
93 dev_dbg(&pdev->dev, "isr: Transmitting even slots\n");
94
95 if (esr & ESAI_ESR_TD_MASK)
96 dev_dbg(&pdev->dev, "isr: Transmitting data\n");
97
98 if (esr & ESAI_ESR_RLS_MASK)
99 dev_dbg(&pdev->dev, "isr: Just received the last slot\n");
100
101 if (esr & ESAI_ESR_RDE_MASK)
102 dev_dbg(&pdev->dev, "isr: Receiving data exception\n");
103
104 if (esr & ESAI_ESR_RED_MASK)
105 dev_dbg(&pdev->dev, "isr: Receiving even slots\n");
106
107 if (esr & ESAI_ESR_RD_MASK)
108 dev_dbg(&pdev->dev, "isr: Receiving data\n");
109
110 return IRQ_HANDLED;
111}
112
113
114
115
116
117
118
119
120
121
122static int fsl_esai_divisor_cal(struct snd_soc_dai *dai, bool tx, u32 ratio,
123 bool usefp, u32 fp)
124{
125 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
126 u32 psr, pm = 999, maxfp, prod, sub, savesub, i, j;
127
128 maxfp = usefp ? 16 : 1;
129
130 if (usefp && fp)
131 goto out_fp;
132
133 if (ratio > 2 * 8 * 256 * maxfp || ratio < 2) {
134 dev_err(dai->dev, "the ratio is out of range (2 ~ %d)\n",
135 2 * 8 * 256 * maxfp);
136 return -EINVAL;
137 } else if (ratio % 2) {
138 dev_err(dai->dev, "the raio must be even if using upper divider\n");
139 return -EINVAL;
140 }
141
142 ratio /= 2;
143
144 psr = ratio <= 256 * maxfp ? ESAI_xCCR_xPSR_BYPASS : ESAI_xCCR_xPSR_DIV8;
145
146
147 if (ratio <= 256) {
148 pm = ratio;
149 fp = 1;
150 goto out;
151 }
152
153
154 savesub = (psr ? 1 : 8) * 256 * maxfp / 1000;
155
156
157 for (i = 1; i <= 256; i++) {
158 for (j = 1; j <= maxfp; j++) {
159
160 prod = (psr ? 1 : 8) * i * j;
161
162 if (prod == ratio)
163 sub = 0;
164 else if (prod / ratio == 1)
165 sub = prod - ratio;
166 else if (ratio / prod == 1)
167 sub = ratio - prod;
168 else
169 continue;
170
171
172 sub = sub * 1000 / ratio;
173 if (sub < savesub) {
174 savesub = sub;
175 pm = i;
176 fp = j;
177 }
178
179
180 if (savesub == 0)
181 goto out;
182 }
183 }
184
185 if (pm == 999) {
186 dev_err(dai->dev, "failed to calculate proper divisors\n");
187 return -EINVAL;
188 }
189
190out:
191 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
192 ESAI_xCCR_xPSR_MASK | ESAI_xCCR_xPM_MASK,
193 psr | ESAI_xCCR_xPM(pm));
194
195out_fp:
196
197 if (maxfp <= 1)
198 return 0;
199
200 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
201 ESAI_xCCR_xFP_MASK, ESAI_xCCR_xFP(fp));
202
203 return 0;
204}
205
206
207
208
209
210
211
212
213
214
215
216
217static int fsl_esai_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
218 unsigned int freq, int dir)
219{
220 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
221 struct clk *clksrc = esai_priv->extalclk;
222 bool tx = (clk_id <= ESAI_HCKT_EXTAL || esai_priv->synchronous);
223 bool in = dir == SND_SOC_CLOCK_IN;
224 u32 ratio, ecr = 0;
225 unsigned long clk_rate;
226 int ret;
227
228 if (freq == 0) {
229 dev_err(dai->dev, "%sput freq of HCK%c should not be 0Hz\n",
230 in ? "in" : "out", tx ? 'T' : 'R');
231 return -EINVAL;
232 }
233
234
235 if (freq == esai_priv->hck_rate[tx] && dir == esai_priv->hck_dir[tx])
236 return 0;
237
238
239 esai_priv->sck_div[tx] = true;
240
241
242 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCCR(tx),
243 ESAI_xCCR_xHCKD, in ? 0 : ESAI_xCCR_xHCKD);
244
245 if (in)
246 goto out;
247
248 switch (clk_id) {
249 case ESAI_HCKT_FSYS:
250 case ESAI_HCKR_FSYS:
251 clksrc = esai_priv->fsysclk;
252 break;
253 case ESAI_HCKT_EXTAL:
254 ecr |= ESAI_ECR_ETI;
255 break;
256 case ESAI_HCKR_EXTAL:
257 ecr |= esai_priv->synchronous ? ESAI_ECR_ETI : ESAI_ECR_ERI;
258 break;
259 default:
260 return -EINVAL;
261 }
262
263 if (IS_ERR(clksrc)) {
264 dev_err(dai->dev, "no assigned %s clock\n",
265 clk_id % 2 ? "extal" : "fsys");
266 return PTR_ERR(clksrc);
267 }
268 clk_rate = clk_get_rate(clksrc);
269
270 ratio = clk_rate / freq;
271 if (ratio * freq > clk_rate)
272 ret = ratio * freq - clk_rate;
273 else if (ratio * freq < clk_rate)
274 ret = clk_rate - ratio * freq;
275 else
276 ret = 0;
277
278
279 if (ret != 0 && clk_rate / ret < 1000) {
280 dev_err(dai->dev, "failed to derive required HCK%c rate\n",
281 tx ? 'T' : 'R');
282 return -EINVAL;
283 }
284
285
286 if (ratio == 1 && clksrc == esai_priv->extalclk) {
287
288 ecr |= tx ? ESAI_ECR_ETO : ESAI_ECR_ERO;
289 goto out;
290 } else if (ratio < 2) {
291
292 dev_err(dai->dev, "failed to derive required HCK%c rate\n",
293 tx ? 'T' : 'R');
294 return -EINVAL;
295 }
296
297 ret = fsl_esai_divisor_cal(dai, tx, ratio, false, 0);
298 if (ret)
299 return ret;
300
301 esai_priv->sck_div[tx] = false;
302
303out:
304 esai_priv->hck_dir[tx] = dir;
305 esai_priv->hck_rate[tx] = freq;
306
307 regmap_update_bits(esai_priv->regmap, REG_ESAI_ECR,
308 tx ? ESAI_ECR_ETI | ESAI_ECR_ETO :
309 ESAI_ECR_ERI | ESAI_ECR_ERO, ecr);
310
311 return 0;
312}
313
314
315
316
317static int fsl_esai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
318{
319 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
320 u32 hck_rate = esai_priv->hck_rate[tx];
321 u32 sub, ratio = hck_rate / freq;
322 int ret;
323
324
325 if (esai_priv->slave_mode || esai_priv->sck_rate[tx] == freq)
326 return 0;
327
328 if (ratio * freq > hck_rate)
329 sub = ratio * freq - hck_rate;
330 else if (ratio * freq < hck_rate)
331 sub = hck_rate - ratio * freq;
332 else
333 sub = 0;
334
335
336 if (sub != 0 && hck_rate / sub < 1000) {
337 dev_err(dai->dev, "failed to derive required SCK%c rate\n",
338 tx ? 'T' : 'R');
339 return -EINVAL;
340 }
341
342
343 if (!esai_priv->sck_div[tx] && (ratio > 16 || ratio == 0)) {
344 dev_err(dai->dev, "the ratio is out of range (1 ~ 16)\n");
345 return -EINVAL;
346 }
347
348 ret = fsl_esai_divisor_cal(dai, tx, ratio, true,
349 esai_priv->sck_div[tx] ? 0 : ratio);
350 if (ret)
351 return ret;
352
353
354 esai_priv->sck_rate[tx] = freq;
355
356 return 0;
357}
358
359static int fsl_esai_set_dai_tdm_slot(struct snd_soc_dai *dai, u32 tx_mask,
360 u32 rx_mask, int slots, int slot_width)
361{
362 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
363
364 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR,
365 ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(slots));
366
367 regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR,
368 ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(slots));
369
370 esai_priv->slot_width = slot_width;
371 esai_priv->slots = slots;
372 esai_priv->tx_mask = tx_mask;
373 esai_priv->rx_mask = rx_mask;
374
375 return 0;
376}
377
378static int fsl_esai_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
379{
380 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
381 u32 xcr = 0, xccr = 0, mask;
382
383
384 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
385 case SND_SOC_DAIFMT_I2S:
386
387 xcr |= ESAI_xCR_xFSR;
388 xccr |= ESAI_xCCR_xFSP | ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
389 break;
390 case SND_SOC_DAIFMT_LEFT_J:
391
392 xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
393 break;
394 case SND_SOC_DAIFMT_RIGHT_J:
395
396 xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
397 xcr |= ESAI_xCR_xWA;
398 break;
399 case SND_SOC_DAIFMT_DSP_A:
400
401 xcr |= ESAI_xCR_xFSL | ESAI_xCR_xFSR;
402 xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
403 break;
404 case SND_SOC_DAIFMT_DSP_B:
405
406 xcr |= ESAI_xCR_xFSL;
407 xccr |= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
408 break;
409 default:
410 return -EINVAL;
411 }
412
413
414 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
415 case SND_SOC_DAIFMT_NB_NF:
416
417 break;
418 case SND_SOC_DAIFMT_IB_NF:
419
420 xccr ^= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP;
421 break;
422 case SND_SOC_DAIFMT_NB_IF:
423
424 xccr ^= ESAI_xCCR_xFSP;
425 break;
426 case SND_SOC_DAIFMT_IB_IF:
427
428 xccr ^= ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP | ESAI_xCCR_xFSP;
429 break;
430 default:
431 return -EINVAL;
432 }
433
434 esai_priv->slave_mode = false;
435
436
437 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
438 case SND_SOC_DAIFMT_CBM_CFM:
439 esai_priv->slave_mode = true;
440 break;
441 case SND_SOC_DAIFMT_CBS_CFM:
442 xccr |= ESAI_xCCR_xCKD;
443 break;
444 case SND_SOC_DAIFMT_CBM_CFS:
445 xccr |= ESAI_xCCR_xFSD;
446 break;
447 case SND_SOC_DAIFMT_CBS_CFS:
448 xccr |= ESAI_xCCR_xFSD | ESAI_xCCR_xCKD;
449 break;
450 default:
451 return -EINVAL;
452 }
453
454 mask = ESAI_xCR_xFSL | ESAI_xCR_xFSR | ESAI_xCR_xWA;
455 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, mask, xcr);
456 regmap_update_bits(esai_priv->regmap, REG_ESAI_RCR, mask, xcr);
457
458 mask = ESAI_xCCR_xCKP | ESAI_xCCR_xHCKP | ESAI_xCCR_xFSP |
459 ESAI_xCCR_xFSD | ESAI_xCCR_xCKD;
460 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR, mask, xccr);
461 regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR, mask, xccr);
462
463 return 0;
464}
465
466static int fsl_esai_startup(struct snd_pcm_substream *substream,
467 struct snd_soc_dai *dai)
468{
469 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
470
471 if (!dai->active) {
472
473 regmap_update_bits(esai_priv->regmap, REG_ESAI_SAICR,
474 ESAI_SAICR_SYNC, esai_priv->synchronous ?
475 ESAI_SAICR_SYNC : 0);
476
477
478 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCCR,
479 ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(2));
480 regmap_update_bits(esai_priv->regmap, REG_ESAI_RCCR,
481 ESAI_xCCR_xDC_MASK, ESAI_xCCR_xDC(2));
482 }
483
484 return 0;
485
486}
487
488static int fsl_esai_hw_params(struct snd_pcm_substream *substream,
489 struct snd_pcm_hw_params *params,
490 struct snd_soc_dai *dai)
491{
492 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
493 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
494 u32 width = params_width(params);
495 u32 channels = params_channels(params);
496 u32 pins = DIV_ROUND_UP(channels, esai_priv->slots);
497 u32 slot_width = width;
498 u32 bclk, mask, val;
499 int ret;
500
501
502 if (esai_priv->slot_width)
503 slot_width = esai_priv->slot_width;
504
505 bclk = params_rate(params) * slot_width * esai_priv->slots;
506
507 ret = fsl_esai_set_bclk(dai, esai_priv->synchronous || tx, bclk);
508 if (ret)
509 return ret;
510
511 mask = ESAI_xCR_xSWS_MASK;
512 val = ESAI_xCR_xSWS(slot_width, width);
513
514 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), mask, val);
515
516 if (!tx && esai_priv->synchronous)
517 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR, mask, val);
518
519
520 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
521 ESAI_xCR_xMOD_MASK, params_channels(params) > 1 ?
522 ESAI_xCR_xMOD_NETWORK : 0);
523
524 regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
525 ESAI_xFCR_xFR_MASK, ESAI_xFCR_xFR);
526
527 mask = ESAI_xFCR_xFR_MASK | ESAI_xFCR_xWA_MASK | ESAI_xFCR_xFWM_MASK |
528 (tx ? ESAI_xFCR_TE_MASK | ESAI_xFCR_TIEN : ESAI_xFCR_RE_MASK);
529 val = ESAI_xFCR_xWA(width) | ESAI_xFCR_xFWM(esai_priv->fifo_depth) |
530 (tx ? ESAI_xFCR_TE(pins) | ESAI_xFCR_TIEN : ESAI_xFCR_RE(pins));
531
532 regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), mask, val);
533
534 if (tx)
535 regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
536 ESAI_xCR_PADC, ESAI_xCR_PADC);
537
538
539 regmap_update_bits(esai_priv->regmap, REG_ESAI_PRRC,
540 ESAI_PRRC_PDC_MASK, ESAI_PRRC_PDC(ESAI_GPIO));
541 regmap_update_bits(esai_priv->regmap, REG_ESAI_PCRC,
542 ESAI_PCRC_PC_MASK, ESAI_PCRC_PC(ESAI_GPIO));
543 return 0;
544}
545
546static int fsl_esai_trigger(struct snd_pcm_substream *substream, int cmd,
547 struct snd_soc_dai *dai)
548{
549 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
550 bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
551 u8 i, channels = substream->runtime->channels;
552 u32 pins = DIV_ROUND_UP(channels, esai_priv->slots);
553 u32 mask;
554
555 switch (cmd) {
556 case SNDRV_PCM_TRIGGER_START:
557 case SNDRV_PCM_TRIGGER_RESUME:
558 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
559 regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
560 ESAI_xFCR_xFEN_MASK, ESAI_xFCR_xFEN);
561
562
563 for (i = 0; tx && i < channels; i++)
564 regmap_write(esai_priv->regmap, REG_ESAI_ETDR, 0x0);
565
566
567
568
569
570
571
572
573
574
575
576
577
578 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
579 tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK,
580 tx ? ESAI_xCR_TE(pins) : ESAI_xCR_RE(pins));
581 mask = tx ? esai_priv->tx_mask : esai_priv->rx_mask;
582
583 regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx),
584 ESAI_xSMB_xS_MASK, ESAI_xSMB_xS(mask));
585 regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx),
586 ESAI_xSMA_xS_MASK, ESAI_xSMA_xS(mask));
587
588 break;
589 case SNDRV_PCM_TRIGGER_SUSPEND:
590 case SNDRV_PCM_TRIGGER_STOP:
591 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
592 regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
593 tx ? ESAI_xCR_TE_MASK : ESAI_xCR_RE_MASK, 0);
594 regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMA(tx),
595 ESAI_xSMA_xS_MASK, 0);
596 regmap_update_bits(esai_priv->regmap, REG_ESAI_xSMB(tx),
597 ESAI_xSMB_xS_MASK, 0);
598
599
600 regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
601 ESAI_xFCR_xFR | ESAI_xFCR_xFEN, ESAI_xFCR_xFR);
602 regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx),
603 ESAI_xFCR_xFR, 0);
604 break;
605 default:
606 return -EINVAL;
607 }
608
609 return 0;
610}
611
612static const struct snd_soc_dai_ops fsl_esai_dai_ops = {
613 .startup = fsl_esai_startup,
614 .trigger = fsl_esai_trigger,
615 .hw_params = fsl_esai_hw_params,
616 .set_sysclk = fsl_esai_set_dai_sysclk,
617 .set_fmt = fsl_esai_set_dai_fmt,
618 .set_tdm_slot = fsl_esai_set_dai_tdm_slot,
619};
620
621static int fsl_esai_dai_probe(struct snd_soc_dai *dai)
622{
623 struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
624
625 snd_soc_dai_init_dma_data(dai, &esai_priv->dma_params_tx,
626 &esai_priv->dma_params_rx);
627
628 return 0;
629}
630
631static struct snd_soc_dai_driver fsl_esai_dai = {
632 .probe = fsl_esai_dai_probe,
633 .playback = {
634 .stream_name = "CPU-Playback",
635 .channels_min = 1,
636 .channels_max = 12,
637 .rates = SNDRV_PCM_RATE_8000_192000,
638 .formats = FSL_ESAI_FORMATS,
639 },
640 .capture = {
641 .stream_name = "CPU-Capture",
642 .channels_min = 1,
643 .channels_max = 8,
644 .rates = SNDRV_PCM_RATE_8000_192000,
645 .formats = FSL_ESAI_FORMATS,
646 },
647 .ops = &fsl_esai_dai_ops,
648};
649
650static const struct snd_soc_component_driver fsl_esai_component = {
651 .name = "fsl-esai",
652};
653
654static const struct reg_default fsl_esai_reg_defaults[] = {
655 {REG_ESAI_ETDR, 0x00000000},
656 {REG_ESAI_ECR, 0x00000000},
657 {REG_ESAI_TFCR, 0x00000000},
658 {REG_ESAI_RFCR, 0x00000000},
659 {REG_ESAI_TX0, 0x00000000},
660 {REG_ESAI_TX1, 0x00000000},
661 {REG_ESAI_TX2, 0x00000000},
662 {REG_ESAI_TX3, 0x00000000},
663 {REG_ESAI_TX4, 0x00000000},
664 {REG_ESAI_TX5, 0x00000000},
665 {REG_ESAI_TSR, 0x00000000},
666 {REG_ESAI_SAICR, 0x00000000},
667 {REG_ESAI_TCR, 0x00000000},
668 {REG_ESAI_TCCR, 0x00000000},
669 {REG_ESAI_RCR, 0x00000000},
670 {REG_ESAI_RCCR, 0x00000000},
671 {REG_ESAI_TSMA, 0x0000ffff},
672 {REG_ESAI_TSMB, 0x0000ffff},
673 {REG_ESAI_RSMA, 0x0000ffff},
674 {REG_ESAI_RSMB, 0x0000ffff},
675 {REG_ESAI_PRRC, 0x00000000},
676 {REG_ESAI_PCRC, 0x00000000},
677};
678
679static bool fsl_esai_readable_reg(struct device *dev, unsigned int reg)
680{
681 switch (reg) {
682 case REG_ESAI_ERDR:
683 case REG_ESAI_ECR:
684 case REG_ESAI_ESR:
685 case REG_ESAI_TFCR:
686 case REG_ESAI_TFSR:
687 case REG_ESAI_RFCR:
688 case REG_ESAI_RFSR:
689 case REG_ESAI_RX0:
690 case REG_ESAI_RX1:
691 case REG_ESAI_RX2:
692 case REG_ESAI_RX3:
693 case REG_ESAI_SAISR:
694 case REG_ESAI_SAICR:
695 case REG_ESAI_TCR:
696 case REG_ESAI_TCCR:
697 case REG_ESAI_RCR:
698 case REG_ESAI_RCCR:
699 case REG_ESAI_TSMA:
700 case REG_ESAI_TSMB:
701 case REG_ESAI_RSMA:
702 case REG_ESAI_RSMB:
703 case REG_ESAI_PRRC:
704 case REG_ESAI_PCRC:
705 return true;
706 default:
707 return false;
708 }
709}
710
711static bool fsl_esai_volatile_reg(struct device *dev, unsigned int reg)
712{
713 switch (reg) {
714 case REG_ESAI_ERDR:
715 case REG_ESAI_ESR:
716 case REG_ESAI_TFSR:
717 case REG_ESAI_RFSR:
718 case REG_ESAI_RX0:
719 case REG_ESAI_RX1:
720 case REG_ESAI_RX2:
721 case REG_ESAI_RX3:
722 case REG_ESAI_SAISR:
723 return true;
724 default:
725 return false;
726 }
727}
728
729static bool fsl_esai_writeable_reg(struct device *dev, unsigned int reg)
730{
731 switch (reg) {
732 case REG_ESAI_ETDR:
733 case REG_ESAI_ECR:
734 case REG_ESAI_TFCR:
735 case REG_ESAI_RFCR:
736 case REG_ESAI_TX0:
737 case REG_ESAI_TX1:
738 case REG_ESAI_TX2:
739 case REG_ESAI_TX3:
740 case REG_ESAI_TX4:
741 case REG_ESAI_TX5:
742 case REG_ESAI_TSR:
743 case REG_ESAI_SAICR:
744 case REG_ESAI_TCR:
745 case REG_ESAI_TCCR:
746 case REG_ESAI_RCR:
747 case REG_ESAI_RCCR:
748 case REG_ESAI_TSMA:
749 case REG_ESAI_TSMB:
750 case REG_ESAI_RSMA:
751 case REG_ESAI_RSMB:
752 case REG_ESAI_PRRC:
753 case REG_ESAI_PCRC:
754 return true;
755 default:
756 return false;
757 }
758}
759
760static const struct regmap_config fsl_esai_regmap_config = {
761 .reg_bits = 32,
762 .reg_stride = 4,
763 .val_bits = 32,
764
765 .max_register = REG_ESAI_PCRC,
766 .reg_defaults = fsl_esai_reg_defaults,
767 .num_reg_defaults = ARRAY_SIZE(fsl_esai_reg_defaults),
768 .readable_reg = fsl_esai_readable_reg,
769 .volatile_reg = fsl_esai_volatile_reg,
770 .writeable_reg = fsl_esai_writeable_reg,
771 .cache_type = REGCACHE_FLAT,
772};
773
774static int fsl_esai_probe(struct platform_device *pdev)
775{
776 struct device_node *np = pdev->dev.of_node;
777 struct fsl_esai *esai_priv;
778 struct resource *res;
779 const __be32 *iprop;
780 void __iomem *regs;
781 int irq, ret;
782
783 esai_priv = devm_kzalloc(&pdev->dev, sizeof(*esai_priv), GFP_KERNEL);
784 if (!esai_priv)
785 return -ENOMEM;
786
787 esai_priv->pdev = pdev;
788 snprintf(esai_priv->name, sizeof(esai_priv->name), "%pOFn", np);
789
790
791 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
792 regs = devm_ioremap_resource(&pdev->dev, res);
793 if (IS_ERR(regs))
794 return PTR_ERR(regs);
795
796 esai_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
797 "core", regs, &fsl_esai_regmap_config);
798 if (IS_ERR(esai_priv->regmap)) {
799 dev_err(&pdev->dev, "failed to init regmap: %ld\n",
800 PTR_ERR(esai_priv->regmap));
801 return PTR_ERR(esai_priv->regmap);
802 }
803
804 esai_priv->coreclk = devm_clk_get(&pdev->dev, "core");
805 if (IS_ERR(esai_priv->coreclk)) {
806 dev_err(&pdev->dev, "failed to get core clock: %ld\n",
807 PTR_ERR(esai_priv->coreclk));
808 return PTR_ERR(esai_priv->coreclk);
809 }
810
811 esai_priv->extalclk = devm_clk_get(&pdev->dev, "extal");
812 if (IS_ERR(esai_priv->extalclk))
813 dev_warn(&pdev->dev, "failed to get extal clock: %ld\n",
814 PTR_ERR(esai_priv->extalclk));
815
816 esai_priv->fsysclk = devm_clk_get(&pdev->dev, "fsys");
817 if (IS_ERR(esai_priv->fsysclk))
818 dev_warn(&pdev->dev, "failed to get fsys clock: %ld\n",
819 PTR_ERR(esai_priv->fsysclk));
820
821 esai_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
822 if (IS_ERR(esai_priv->spbaclk))
823 dev_warn(&pdev->dev, "failed to get spba clock: %ld\n",
824 PTR_ERR(esai_priv->spbaclk));
825
826 irq = platform_get_irq(pdev, 0);
827 if (irq < 0) {
828 dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
829 return irq;
830 }
831
832 ret = devm_request_irq(&pdev->dev, irq, esai_isr, 0,
833 esai_priv->name, esai_priv);
834 if (ret) {
835 dev_err(&pdev->dev, "failed to claim irq %u\n", irq);
836 return ret;
837 }
838
839
840 esai_priv->slots = 2;
841
842
843 esai_priv->slave_mode = true;
844
845
846 iprop = of_get_property(np, "fsl,fifo-depth", NULL);
847 if (iprop)
848 esai_priv->fifo_depth = be32_to_cpup(iprop);
849 else
850 esai_priv->fifo_depth = 64;
851
852 esai_priv->dma_params_tx.maxburst = 16;
853 esai_priv->dma_params_rx.maxburst = 16;
854 esai_priv->dma_params_tx.addr = res->start + REG_ESAI_ETDR;
855 esai_priv->dma_params_rx.addr = res->start + REG_ESAI_ERDR;
856
857 esai_priv->synchronous =
858 of_property_read_bool(np, "fsl,esai-synchronous");
859
860
861 if (esai_priv->synchronous) {
862 fsl_esai_dai.symmetric_rates = 1;
863 fsl_esai_dai.symmetric_channels = 1;
864 fsl_esai_dai.symmetric_samplebits = 1;
865 }
866
867 dev_set_drvdata(&pdev->dev, esai_priv);
868
869
870 ret = regmap_write(esai_priv->regmap, REG_ESAI_ECR, ESAI_ECR_ERST);
871 if (ret) {
872 dev_err(&pdev->dev, "failed to reset ESAI: %d\n", ret);
873 return ret;
874 }
875
876
877
878
879
880 ret = regmap_write(esai_priv->regmap, REG_ESAI_ECR, ESAI_ECR_ESAIEN);
881 if (ret) {
882 dev_err(&pdev->dev, "failed to enable ESAI: %d\n", ret);
883 return ret;
884 }
885
886 esai_priv->tx_mask = 0xFFFFFFFF;
887 esai_priv->rx_mask = 0xFFFFFFFF;
888
889
890 regmap_write(esai_priv->regmap, REG_ESAI_TSMA, 0);
891 regmap_write(esai_priv->regmap, REG_ESAI_TSMB, 0);
892 regmap_write(esai_priv->regmap, REG_ESAI_RSMA, 0);
893 regmap_write(esai_priv->regmap, REG_ESAI_RSMB, 0);
894
895 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_esai_component,
896 &fsl_esai_dai, 1);
897 if (ret) {
898 dev_err(&pdev->dev, "failed to register DAI: %d\n", ret);
899 return ret;
900 }
901
902 pm_runtime_enable(&pdev->dev);
903
904 regcache_cache_only(esai_priv->regmap, true);
905
906 ret = imx_pcm_dma_init(pdev, IMX_ESAI_DMABUF_SIZE);
907 if (ret)
908 dev_err(&pdev->dev, "failed to init imx pcm dma: %d\n", ret);
909
910 return ret;
911}
912
913static int fsl_esai_remove(struct platform_device *pdev)
914{
915 pm_runtime_disable(&pdev->dev);
916
917 return 0;
918}
919
920static const struct of_device_id fsl_esai_dt_ids[] = {
921 { .compatible = "fsl,imx35-esai", },
922 { .compatible = "fsl,vf610-esai", },
923 {}
924};
925MODULE_DEVICE_TABLE(of, fsl_esai_dt_ids);
926
927#ifdef CONFIG_PM
928static int fsl_esai_runtime_resume(struct device *dev)
929{
930 struct fsl_esai *esai = dev_get_drvdata(dev);
931 int ret;
932
933
934
935
936
937 ret = clk_prepare_enable(esai->coreclk);
938 if (ret)
939 return ret;
940 if (!IS_ERR(esai->spbaclk)) {
941 ret = clk_prepare_enable(esai->spbaclk);
942 if (ret)
943 goto err_spbaclk;
944 }
945 if (!IS_ERR(esai->extalclk)) {
946 ret = clk_prepare_enable(esai->extalclk);
947 if (ret)
948 goto err_extalclk;
949 }
950 if (!IS_ERR(esai->fsysclk)) {
951 ret = clk_prepare_enable(esai->fsysclk);
952 if (ret)
953 goto err_fsysclk;
954 }
955
956 regcache_cache_only(esai->regmap, false);
957
958
959 regmap_update_bits(esai->regmap, REG_ESAI_TFCR,
960 ESAI_xFCR_xFR, ESAI_xFCR_xFR);
961 regmap_update_bits(esai->regmap, REG_ESAI_RFCR,
962 ESAI_xFCR_xFR, ESAI_xFCR_xFR);
963
964 ret = regcache_sync(esai->regmap);
965 if (ret)
966 goto err_regcache_sync;
967
968
969 regmap_update_bits(esai->regmap, REG_ESAI_TFCR, ESAI_xFCR_xFR, 0);
970 regmap_update_bits(esai->regmap, REG_ESAI_RFCR, ESAI_xFCR_xFR, 0);
971
972 return 0;
973
974err_regcache_sync:
975 if (!IS_ERR(esai->fsysclk))
976 clk_disable_unprepare(esai->fsysclk);
977err_fsysclk:
978 if (!IS_ERR(esai->extalclk))
979 clk_disable_unprepare(esai->extalclk);
980err_extalclk:
981 if (!IS_ERR(esai->spbaclk))
982 clk_disable_unprepare(esai->spbaclk);
983err_spbaclk:
984 clk_disable_unprepare(esai->coreclk);
985
986 return ret;
987}
988
989static int fsl_esai_runtime_suspend(struct device *dev)
990{
991 struct fsl_esai *esai = dev_get_drvdata(dev);
992
993 regcache_cache_only(esai->regmap, true);
994 regcache_mark_dirty(esai->regmap);
995
996 if (!IS_ERR(esai->fsysclk))
997 clk_disable_unprepare(esai->fsysclk);
998 if (!IS_ERR(esai->extalclk))
999 clk_disable_unprepare(esai->extalclk);
1000 if (!IS_ERR(esai->spbaclk))
1001 clk_disable_unprepare(esai->spbaclk);
1002 clk_disable_unprepare(esai->coreclk);
1003
1004 return 0;
1005}
1006#endif
1007
1008static const struct dev_pm_ops fsl_esai_pm_ops = {
1009 SET_RUNTIME_PM_OPS(fsl_esai_runtime_suspend,
1010 fsl_esai_runtime_resume,
1011 NULL)
1012 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1013 pm_runtime_force_resume)
1014};
1015
1016static struct platform_driver fsl_esai_driver = {
1017 .probe = fsl_esai_probe,
1018 .remove = fsl_esai_remove,
1019 .driver = {
1020 .name = "fsl-esai-dai",
1021 .pm = &fsl_esai_pm_ops,
1022 .of_match_table = fsl_esai_dt_ids,
1023 },
1024};
1025
1026module_platform_driver(fsl_esai_driver);
1027
1028MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1029MODULE_DESCRIPTION("Freescale ESAI CPU DAI driver");
1030MODULE_LICENSE("GPL v2");
1031MODULE_ALIAS("platform:fsl-esai-dai");
1032