1// SPDX-License-Identifier: GPL-2.0-only
2/* sound/soc/rockchip/rockchip_i2s.c
3 *
4 * ALSA SoC Audio Layer - Rockchip I2S Controller driver
5 *
6 * Copyright (c) 2014 Rockchip Electronics Co. Ltd.
7 * Author: Jianqun <jay.xu@rock-chips.com>
8 */
9
10#include <linux/module.h>
11#include <linux/mfd/syscon.h>
12#include <linux/delay.h>
13#include <linux/of.h>
14#include <linux/clk.h>
15#include <linux/pinctrl/consumer.h>
16#include <linux/pm_runtime.h>
17#include <linux/regmap.h>
18#include <linux/spinlock.h>
19#include <sound/pcm_params.h>
20#include <sound/dmaengine_pcm.h>
21
22#include "rockchip_i2s.h"
23
24#define DRV_NAME "rockchip-i2s"
25
26struct rk_i2s_pins {
27 u32 reg_offset;
28 u32 shift;
29};
30
31struct rk_i2s_dev {
32 struct device *dev;
33
34 struct clk *hclk;
35 struct clk *mclk;
36
37 struct snd_dmaengine_dai_dma_data capture_dma_data;
38 struct snd_dmaengine_dai_dma_data playback_dma_data;
39
40 struct regmap *regmap;
41 struct regmap *grf;
42
43 bool has_capture;
44 bool has_playback;
45
46/*
47 * Used to indicate the tx/rx status.
48 * I2S controller hopes to start the tx and rx together,
49 * also to stop them when they are both try to stop.
50*/
51 bool tx_start;
52 bool rx_start;
53 bool is_master_mode;
54 const struct rk_i2s_pins *pins;
55 unsigned int bclk_ratio;
56 spinlock_t lock; /* tx/rx lock */
57 struct pinctrl *pinctrl;
58 struct pinctrl_state *bclk_on;
59 struct pinctrl_state *bclk_off;
60};
61
62static int i2s_pinctrl_select_bclk_on(struct rk_i2s_dev *i2s)
63{
64 int ret = 0;
65
66 if (!IS_ERR(ptr: i2s->pinctrl) && !IS_ERR_OR_NULL(ptr: i2s->bclk_on))
67 ret = pinctrl_select_state(p: i2s->pinctrl, s: i2s->bclk_on);
68
69 if (ret)
70 dev_err(i2s->dev, "bclk enable failed %d\n", ret);
71
72 return ret;
73}
74
75static int i2s_pinctrl_select_bclk_off(struct rk_i2s_dev *i2s)
76{
77
78 int ret = 0;
79
80 if (!IS_ERR(ptr: i2s->pinctrl) && !IS_ERR_OR_NULL(ptr: i2s->bclk_off))
81 ret = pinctrl_select_state(p: i2s->pinctrl, s: i2s->bclk_off);
82
83 if (ret)
84 dev_err(i2s->dev, "bclk disable failed %d\n", ret);
85
86 return ret;
87}
88
89static int i2s_runtime_suspend(struct device *dev)
90{
91 struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
92
93 regcache_cache_only(map: i2s->regmap, enable: true);
94 clk_disable_unprepare(clk: i2s->mclk);
95
96 return 0;
97}
98
99static int i2s_runtime_resume(struct device *dev)
100{
101 struct rk_i2s_dev *i2s = dev_get_drvdata(dev);
102 int ret;
103
104 ret = clk_prepare_enable(clk: i2s->mclk);
105 if (ret) {
106 dev_err(i2s->dev, "clock enable failed %d\n", ret);
107 return ret;
108 }
109
110 regcache_cache_only(map: i2s->regmap, enable: false);
111 regcache_mark_dirty(map: i2s->regmap);
112
113 ret = regcache_sync(map: i2s->regmap);
114 if (ret)
115 clk_disable_unprepare(clk: i2s->mclk);
116
117 return ret;
118}
119
120static inline struct rk_i2s_dev *to_info(struct snd_soc_dai *dai)
121{
122 return snd_soc_dai_get_drvdata(dai);
123}
124
125static int rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on)
126{
127 unsigned int val = 0;
128 int ret = 0;
129
130 spin_lock(lock: &i2s->lock);
131 if (on) {
132 ret = regmap_update_bits(map: i2s->regmap, I2S_DMACR,
133 I2S_DMACR_TDE_ENABLE,
134 I2S_DMACR_TDE_ENABLE);
135 if (ret < 0)
136 goto end;
137 ret = regmap_update_bits(map: i2s->regmap, I2S_XFER,
138 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
139 I2S_XFER_TXS_START | I2S_XFER_RXS_START);
140 if (ret < 0)
141 goto end;
142 i2s->tx_start = true;
143 } else {
144 i2s->tx_start = false;
145
146 ret = regmap_update_bits(map: i2s->regmap, I2S_DMACR,
147 I2S_DMACR_TDE_ENABLE,
148 I2S_DMACR_TDE_DISABLE);
149 if (ret < 0)
150 goto end;
151
152 if (!i2s->rx_start) {
153 ret = regmap_update_bits(map: i2s->regmap, I2S_XFER,
154 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
155 I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
156 if (ret < 0)
157 goto end;
158 udelay(usec: 150);
159 ret = regmap_update_bits(map: i2s->regmap, I2S_CLR,
160 I2S_CLR_TXC | I2S_CLR_RXC,
161 I2S_CLR_TXC | I2S_CLR_RXC);
162 if (ret < 0)
163 goto end;
164 ret = regmap_read_poll_timeout_atomic(i2s->regmap,
165 I2S_CLR,
166 val,
167 val == 0,
168 20,
169 200);
170 if (ret < 0)
171 dev_warn(i2s->dev, "fail to clear: %d\n", ret);
172 }
173 }
174end:
175 spin_unlock(lock: &i2s->lock);
176 if (ret < 0)
177 dev_err(i2s->dev, "lrclk update failed\n");
178
179 return ret;
180}
181
182static int rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on)
183{
184 unsigned int val = 0;
185 int ret = 0;
186
187 spin_lock(lock: &i2s->lock);
188 if (on) {
189 ret = regmap_update_bits(map: i2s->regmap, I2S_DMACR,
190 I2S_DMACR_RDE_ENABLE,
191 I2S_DMACR_RDE_ENABLE);
192 if (ret < 0)
193 goto end;
194
195 ret = regmap_update_bits(map: i2s->regmap, I2S_XFER,
196 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
197 I2S_XFER_TXS_START | I2S_XFER_RXS_START);
198 if (ret < 0)
199 goto end;
200 i2s->rx_start = true;
201 } else {
202 i2s->rx_start = false;
203
204 ret = regmap_update_bits(map: i2s->regmap, I2S_DMACR,
205 I2S_DMACR_RDE_ENABLE,
206 I2S_DMACR_RDE_DISABLE);
207 if (ret < 0)
208 goto end;
209
210 if (!i2s->tx_start) {
211 ret = regmap_update_bits(map: i2s->regmap, I2S_XFER,
212 I2S_XFER_TXS_START | I2S_XFER_RXS_START,
213 I2S_XFER_TXS_STOP | I2S_XFER_RXS_STOP);
214 if (ret < 0)
215 goto end;
216 udelay(usec: 150);
217 ret = regmap_update_bits(map: i2s->regmap, I2S_CLR,
218 I2S_CLR_TXC | I2S_CLR_RXC,
219 I2S_CLR_TXC | I2S_CLR_RXC);
220 if (ret < 0)
221 goto end;
222 ret = regmap_read_poll_timeout_atomic(i2s->regmap,
223 I2S_CLR,
224 val,
225 val == 0,
226 20,
227 200);
228 if (ret < 0)
229 dev_warn(i2s->dev, "fail to clear: %d\n", ret);
230 }
231 }
232end:
233 spin_unlock(lock: &i2s->lock);
234 if (ret < 0)
235 dev_err(i2s->dev, "lrclk update failed\n");
236
237 return ret;
238}
239
240static int rockchip_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
241 unsigned int fmt)
242{
243 struct rk_i2s_dev *i2s = to_info(dai: cpu_dai);
244 unsigned int mask = 0, val = 0;
245 int ret = 0;
246
247 pm_runtime_get_sync(dev: cpu_dai->dev);
248 mask = I2S_CKR_MSS_MASK;
249 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
250 case SND_SOC_DAIFMT_BP_FP:
251 /* Set source clock in Master mode */
252 val = I2S_CKR_MSS_MASTER;
253 i2s->is_master_mode = true;
254 break;
255 case SND_SOC_DAIFMT_BC_FC:
256 val = I2S_CKR_MSS_SLAVE;
257 i2s->is_master_mode = false;
258 break;
259 default:
260 ret = -EINVAL;
261 goto err_pm_put;
262 }
263
264 regmap_update_bits(map: i2s->regmap, I2S_CKR, mask, val);
265
266 mask = I2S_CKR_CKP_MASK | I2S_CKR_TLP_MASK | I2S_CKR_RLP_MASK;
267 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
268 case SND_SOC_DAIFMT_NB_NF:
269 val = I2S_CKR_CKP_NORMAL |
270 I2S_CKR_TLP_NORMAL |
271 I2S_CKR_RLP_NORMAL;
272 break;
273 case SND_SOC_DAIFMT_NB_IF:
274 val = I2S_CKR_CKP_NORMAL |
275 I2S_CKR_TLP_INVERTED |
276 I2S_CKR_RLP_INVERTED;
277 break;
278 case SND_SOC_DAIFMT_IB_NF:
279 val = I2S_CKR_CKP_INVERTED |
280 I2S_CKR_TLP_NORMAL |
281 I2S_CKR_RLP_NORMAL;
282 break;
283 case SND_SOC_DAIFMT_IB_IF:
284 val = I2S_CKR_CKP_INVERTED |
285 I2S_CKR_TLP_INVERTED |
286 I2S_CKR_RLP_INVERTED;
287 break;
288 default:
289 ret = -EINVAL;
290 goto err_pm_put;
291 }
292
293 regmap_update_bits(map: i2s->regmap, I2S_CKR, mask, val);
294
295 mask = I2S_TXCR_IBM_MASK | I2S_TXCR_TFS_MASK | I2S_TXCR_PBM_MASK;
296 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
297 case SND_SOC_DAIFMT_RIGHT_J:
298 val = I2S_TXCR_IBM_RSJM;
299 break;
300 case SND_SOC_DAIFMT_LEFT_J:
301 val = I2S_TXCR_IBM_LSJM;
302 break;
303 case SND_SOC_DAIFMT_I2S:
304 val = I2S_TXCR_IBM_NORMAL;
305 break;
306 case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
307 val = I2S_TXCR_TFS_PCM | I2S_TXCR_PBM_MODE(1);
308 break;
309 case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
310 val = I2S_TXCR_TFS_PCM;
311 break;
312 default:
313 ret = -EINVAL;
314 goto err_pm_put;
315 }
316
317 regmap_update_bits(map: i2s->regmap, I2S_TXCR, mask, val);
318
319 mask = I2S_RXCR_IBM_MASK | I2S_RXCR_TFS_MASK | I2S_RXCR_PBM_MASK;
320 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
321 case SND_SOC_DAIFMT_RIGHT_J:
322 val = I2S_RXCR_IBM_RSJM;
323 break;
324 case SND_SOC_DAIFMT_LEFT_J:
325 val = I2S_RXCR_IBM_LSJM;
326 break;
327 case SND_SOC_DAIFMT_I2S:
328 val = I2S_RXCR_IBM_NORMAL;
329 break;
330 case SND_SOC_DAIFMT_DSP_A: /* PCM delay 1 bit mode */
331 val = I2S_RXCR_TFS_PCM | I2S_RXCR_PBM_MODE(1);
332 break;
333 case SND_SOC_DAIFMT_DSP_B: /* PCM no delay mode */
334 val = I2S_RXCR_TFS_PCM;
335 break;
336 default:
337 ret = -EINVAL;
338 goto err_pm_put;
339 }
340
341 regmap_update_bits(map: i2s->regmap, I2S_RXCR, mask, val);
342
343err_pm_put:
344 pm_runtime_put(dev: cpu_dai->dev);
345
346 return ret;
347}
348
349static int rockchip_i2s_hw_params(struct snd_pcm_substream *substream,
350 struct snd_pcm_hw_params *params,
351 struct snd_soc_dai *dai)
352{
353 struct rk_i2s_dev *i2s = to_info(dai);
354 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
355 unsigned int val = 0;
356 unsigned int mclk_rate, bclk_rate, div_bclk, div_lrck;
357
358 if (i2s->is_master_mode) {
359 mclk_rate = clk_get_rate(clk: i2s->mclk);
360 bclk_rate = i2s->bclk_ratio * params_rate(p: params);
361 if (!bclk_rate)
362 return -EINVAL;
363
364 div_bclk = DIV_ROUND_CLOSEST(mclk_rate, bclk_rate);
365 div_lrck = bclk_rate / params_rate(p: params);
366 regmap_update_bits(map: i2s->regmap, I2S_CKR,
367 I2S_CKR_MDIV_MASK,
368 I2S_CKR_MDIV(div_bclk));
369
370 regmap_update_bits(map: i2s->regmap, I2S_CKR,
371 I2S_CKR_TSD_MASK |
372 I2S_CKR_RSD_MASK,
373 I2S_CKR_TSD(div_lrck) |
374 I2S_CKR_RSD(div_lrck));
375 }
376
377 switch (params_format(p: params)) {
378 case SNDRV_PCM_FORMAT_S8:
379 val |= I2S_TXCR_VDW(8);
380 break;
381 case SNDRV_PCM_FORMAT_S16_LE:
382 val |= I2S_TXCR_VDW(16);
383 break;
384 case SNDRV_PCM_FORMAT_S20_3LE:
385 val |= I2S_TXCR_VDW(20);
386 break;
387 case SNDRV_PCM_FORMAT_S24_LE:
388 val |= I2S_TXCR_VDW(24);
389 break;
390 case SNDRV_PCM_FORMAT_S32_LE:
391 val |= I2S_TXCR_VDW(32);
392 break;
393 default:
394 return -EINVAL;
395 }
396
397 switch (params_channels(p: params)) {
398 case 8:
399 val |= I2S_CHN_8;
400 break;
401 case 6:
402 val |= I2S_CHN_6;
403 break;
404 case 4:
405 val |= I2S_CHN_4;
406 break;
407 case 2:
408 val |= I2S_CHN_2;
409 break;
410 default:
411 dev_err(i2s->dev, "invalid channel: %d\n",
412 params_channels(params));
413 return -EINVAL;
414 }
415
416 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
417 regmap_update_bits(map: i2s->regmap, I2S_RXCR,
418 I2S_RXCR_VDW_MASK | I2S_RXCR_CSR_MASK,
419 val);
420 else
421 regmap_update_bits(map: i2s->regmap, I2S_TXCR,
422 I2S_TXCR_VDW_MASK | I2S_TXCR_CSR_MASK,
423 val);
424
425 if (!IS_ERR(ptr: i2s->grf) && i2s->pins) {
426 regmap_read(map: i2s->regmap, I2S_TXCR, val: &val);
427 val &= I2S_TXCR_CSR_MASK;
428
429 switch (val) {
430 case I2S_CHN_4:
431 val = I2S_IO_4CH_OUT_6CH_IN;
432 break;
433 case I2S_CHN_6:
434 val = I2S_IO_6CH_OUT_4CH_IN;
435 break;
436 case I2S_CHN_8:
437 val = I2S_IO_8CH_OUT_2CH_IN;
438 break;
439 default:
440 val = I2S_IO_2CH_OUT_8CH_IN;
441 break;
442 }
443
444 val <<= i2s->pins->shift;
445 val |= (I2S_IO_DIRECTION_MASK << i2s->pins->shift) << 16;
446 regmap_write(map: i2s->grf, reg: i2s->pins->reg_offset, val);
447 }
448
449 regmap_update_bits(map: i2s->regmap, I2S_DMACR, I2S_DMACR_TDL_MASK,
450 I2S_DMACR_TDL(16));
451 regmap_update_bits(map: i2s->regmap, I2S_DMACR, I2S_DMACR_RDL_MASK,
452 I2S_DMACR_RDL(16));
453
454 val = I2S_CKR_TRCM_TXRX;
455 if (dai->driver->symmetric_rate && rtd->dai_link->symmetric_rate)
456 val = I2S_CKR_TRCM_TXONLY;
457
458 regmap_update_bits(map: i2s->regmap, I2S_CKR,
459 I2S_CKR_TRCM_MASK,
460 val);
461 return 0;
462}
463
464static int rockchip_i2s_trigger(struct snd_pcm_substream *substream,
465 int cmd, struct snd_soc_dai *dai)
466{
467 struct rk_i2s_dev *i2s = to_info(dai);
468 int ret = 0;
469
470 switch (cmd) {
471 case SNDRV_PCM_TRIGGER_START:
472 case SNDRV_PCM_TRIGGER_RESUME:
473 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
474 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
475 ret = rockchip_snd_rxctrl(i2s, on: 1);
476 else
477 ret = rockchip_snd_txctrl(i2s, on: 1);
478 if (ret < 0)
479 return ret;
480 i2s_pinctrl_select_bclk_on(i2s);
481 break;
482 case SNDRV_PCM_TRIGGER_SUSPEND:
483 case SNDRV_PCM_TRIGGER_STOP:
484 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
485 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
486 if (!i2s->tx_start)
487 i2s_pinctrl_select_bclk_off(i2s);
488 ret = rockchip_snd_rxctrl(i2s, on: 0);
489 } else {
490 if (!i2s->rx_start)
491 i2s_pinctrl_select_bclk_off(i2s);
492 ret = rockchip_snd_txctrl(i2s, on: 0);
493 }
494 break;
495 default:
496 ret = -EINVAL;
497 break;
498 }
499
500 return ret;
501}
502
503static int rockchip_i2s_set_bclk_ratio(struct snd_soc_dai *dai,
504 unsigned int ratio)
505{
506 struct rk_i2s_dev *i2s = to_info(dai);
507
508 i2s->bclk_ratio = ratio;
509
510 return 0;
511}
512
513static int rockchip_i2s_set_sysclk(struct snd_soc_dai *cpu_dai, int clk_id,
514 unsigned int freq, int dir)
515{
516 struct rk_i2s_dev *i2s = to_info(dai: cpu_dai);
517 int ret;
518
519 if (freq == 0)
520 return 0;
521
522 ret = clk_set_rate(clk: i2s->mclk, rate: freq);
523 if (ret)
524 dev_err(i2s->dev, "Fail to set mclk %d\n", ret);
525
526 return ret;
527}
528
529static int rockchip_i2s_dai_probe(struct snd_soc_dai *dai)
530{
531 struct rk_i2s_dev *i2s = snd_soc_dai_get_drvdata(dai);
532
533 snd_soc_dai_init_dma_data(dai,
534 playback: i2s->has_playback ? &i2s->playback_dma_data : NULL,
535 capture: i2s->has_capture ? &i2s->capture_dma_data : NULL);
536
537 return 0;
538}
539
540static const struct snd_soc_dai_ops rockchip_i2s_dai_ops = {
541 .probe = rockchip_i2s_dai_probe,
542 .hw_params = rockchip_i2s_hw_params,
543 .set_bclk_ratio = rockchip_i2s_set_bclk_ratio,
544 .set_sysclk = rockchip_i2s_set_sysclk,
545 .set_fmt = rockchip_i2s_set_fmt,
546 .trigger = rockchip_i2s_trigger,
547};
548
549static struct snd_soc_dai_driver rockchip_i2s_dai = {
550 .ops = &rockchip_i2s_dai_ops,
551 .symmetric_rate = 1,
552};
553
554static const struct snd_soc_component_driver rockchip_i2s_component = {
555 .name = DRV_NAME,
556 .legacy_dai_naming = 1,
557};
558
559static bool rockchip_i2s_wr_reg(struct device *dev, unsigned int reg)
560{
561 switch (reg) {
562 case I2S_TXCR:
563 case I2S_RXCR:
564 case I2S_CKR:
565 case I2S_DMACR:
566 case I2S_INTCR:
567 case I2S_XFER:
568 case I2S_CLR:
569 case I2S_TXDR:
570 return true;
571 default:
572 return false;
573 }
574}
575
576static bool rockchip_i2s_rd_reg(struct device *dev, unsigned int reg)
577{
578 switch (reg) {
579 case I2S_TXCR:
580 case I2S_RXCR:
581 case I2S_CKR:
582 case I2S_DMACR:
583 case I2S_INTCR:
584 case I2S_XFER:
585 case I2S_CLR:
586 case I2S_TXDR:
587 case I2S_RXDR:
588 case I2S_FIFOLR:
589 case I2S_INTSR:
590 return true;
591 default:
592 return false;
593 }
594}
595
596static bool rockchip_i2s_volatile_reg(struct device *dev, unsigned int reg)
597{
598 switch (reg) {
599 case I2S_INTSR:
600 case I2S_CLR:
601 case I2S_FIFOLR:
602 case I2S_TXDR:
603 case I2S_RXDR:
604 return true;
605 default:
606 return false;
607 }
608}
609
610static bool rockchip_i2s_precious_reg(struct device *dev, unsigned int reg)
611{
612 switch (reg) {
613 case I2S_RXDR:
614 return true;
615 default:
616 return false;
617 }
618}
619
620static const struct reg_default rockchip_i2s_reg_defaults[] = {
621 {0x00, 0x0000000f},
622 {0x04, 0x0000000f},
623 {0x08, 0x00071f1f},
624 {0x10, 0x001f0000},
625 {0x14, 0x01f00000},
626};
627
628static const struct regmap_config rockchip_i2s_regmap_config = {
629 .reg_bits = 32,
630 .reg_stride = 4,
631 .val_bits = 32,
632 .max_register = I2S_RXDR,
633 .reg_defaults = rockchip_i2s_reg_defaults,
634 .num_reg_defaults = ARRAY_SIZE(rockchip_i2s_reg_defaults),
635 .writeable_reg = rockchip_i2s_wr_reg,
636 .readable_reg = rockchip_i2s_rd_reg,
637 .volatile_reg = rockchip_i2s_volatile_reg,
638 .precious_reg = rockchip_i2s_precious_reg,
639 .cache_type = REGCACHE_FLAT,
640};
641
642static const struct rk_i2s_pins rk3399_i2s_pins = {
643 .reg_offset = 0xe220,
644 .shift = 11,
645};
646
647static const struct of_device_id rockchip_i2s_match[] __maybe_unused = {
648 { .compatible = "rockchip,px30-i2s", },
649 { .compatible = "rockchip,rk1808-i2s", },
650 { .compatible = "rockchip,rk3036-i2s", },
651 { .compatible = "rockchip,rk3066-i2s", },
652 { .compatible = "rockchip,rk3128-i2s", },
653 { .compatible = "rockchip,rk3188-i2s", },
654 { .compatible = "rockchip,rk3228-i2s", },
655 { .compatible = "rockchip,rk3288-i2s", },
656 { .compatible = "rockchip,rk3308-i2s", },
657 { .compatible = "rockchip,rk3328-i2s", },
658 { .compatible = "rockchip,rk3366-i2s", },
659 { .compatible = "rockchip,rk3368-i2s", },
660 { .compatible = "rockchip,rk3399-i2s", .data = &rk3399_i2s_pins },
661 { .compatible = "rockchip,rk3588-i2s", },
662 { .compatible = "rockchip,rv1126-i2s", },
663 {},
664};
665
666static int rockchip_i2s_init_dai(struct rk_i2s_dev *i2s, struct resource *res,
667 struct snd_soc_dai_driver **dp)
668{
669 struct device_node *node = i2s->dev->of_node;
670 struct snd_soc_dai_driver *dai;
671 struct property *dma_names;
672 const char *dma_name;
673 unsigned int val;
674
675 of_property_for_each_string(node, "dma-names", dma_names, dma_name) {
676 if (!strcmp(dma_name, "tx"))
677 i2s->has_playback = true;
678 if (!strcmp(dma_name, "rx"))
679 i2s->has_capture = true;
680 }
681
682 dai = devm_kmemdup(dev: i2s->dev, src: &rockchip_i2s_dai,
683 len: sizeof(*dai), GFP_KERNEL);
684 if (!dai)
685 return -ENOMEM;
686
687 if (i2s->has_playback) {
688 dai->playback.stream_name = "Playback";
689 dai->playback.channels_min = 2;
690 dai->playback.channels_max = 8;
691 dai->playback.rates = SNDRV_PCM_RATE_8000_192000;
692 dai->playback.formats = SNDRV_PCM_FMTBIT_S8 |
693 SNDRV_PCM_FMTBIT_S16_LE |
694 SNDRV_PCM_FMTBIT_S20_3LE |
695 SNDRV_PCM_FMTBIT_S24_LE |
696 SNDRV_PCM_FMTBIT_S32_LE;
697
698 i2s->playback_dma_data.addr = res->start + I2S_TXDR;
699 i2s->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
700 i2s->playback_dma_data.maxburst = 8;
701
702 if (!of_property_read_u32(np: node, propname: "rockchip,playback-channels", out_value: &val)) {
703 if (val >= 2 && val <= 8)
704 dai->playback.channels_max = val;
705 }
706 }
707
708 if (i2s->has_capture) {
709 dai->capture.stream_name = "Capture";
710 dai->capture.channels_min = 2;
711 dai->capture.channels_max = 8;
712 dai->capture.rates = SNDRV_PCM_RATE_8000_192000;
713 dai->capture.formats = SNDRV_PCM_FMTBIT_S8 |
714 SNDRV_PCM_FMTBIT_S16_LE |
715 SNDRV_PCM_FMTBIT_S20_3LE |
716 SNDRV_PCM_FMTBIT_S24_LE |
717 SNDRV_PCM_FMTBIT_S32_LE;
718
719 i2s->capture_dma_data.addr = res->start + I2S_RXDR;
720 i2s->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
721 i2s->capture_dma_data.maxburst = 8;
722
723 if (!of_property_read_u32(np: node, propname: "rockchip,capture-channels", out_value: &val)) {
724 if (val >= 2 && val <= 8)
725 dai->capture.channels_max = val;
726 }
727 }
728
729 if (dp)
730 *dp = dai;
731
732 return 0;
733}
734
735static int rockchip_i2s_probe(struct platform_device *pdev)
736{
737 struct device_node *node = pdev->dev.of_node;
738 struct rk_i2s_dev *i2s;
739 struct snd_soc_dai_driver *dai;
740 struct resource *res;
741 void __iomem *regs;
742 int ret;
743
744 i2s = devm_kzalloc(dev: &pdev->dev, size: sizeof(*i2s), GFP_KERNEL);
745 if (!i2s)
746 return -ENOMEM;
747
748 spin_lock_init(&i2s->lock);
749 i2s->dev = &pdev->dev;
750
751 i2s->grf = syscon_regmap_lookup_by_phandle(np: node, property: "rockchip,grf");
752 if (!IS_ERR(ptr: i2s->grf)) {
753 i2s->pins = device_get_match_data(dev: &pdev->dev);
754 if (!i2s->pins)
755 return -EINVAL;
756
757 }
758
759 /* try to prepare related clocks */
760 i2s->hclk = devm_clk_get(dev: &pdev->dev, id: "i2s_hclk");
761 if (IS_ERR(ptr: i2s->hclk)) {
762 dev_err(&pdev->dev, "Can't retrieve i2s bus clock\n");
763 return PTR_ERR(ptr: i2s->hclk);
764 }
765 ret = clk_prepare_enable(clk: i2s->hclk);
766 if (ret) {
767 dev_err(i2s->dev, "hclock enable failed %d\n", ret);
768 return ret;
769 }
770
771 i2s->mclk = devm_clk_get(dev: &pdev->dev, id: "i2s_clk");
772 if (IS_ERR(ptr: i2s->mclk)) {
773 dev_err(&pdev->dev, "Can't retrieve i2s master clock\n");
774 ret = PTR_ERR(ptr: i2s->mclk);
775 goto err_clk;
776 }
777
778 regs = devm_platform_get_and_ioremap_resource(pdev, index: 0, res: &res);
779 if (IS_ERR(ptr: regs)) {
780 ret = PTR_ERR(ptr: regs);
781 goto err_clk;
782 }
783
784 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
785 &rockchip_i2s_regmap_config);
786 if (IS_ERR(ptr: i2s->regmap)) {
787 dev_err(&pdev->dev,
788 "Failed to initialise managed register map\n");
789 ret = PTR_ERR(ptr: i2s->regmap);
790 goto err_clk;
791 }
792
793 i2s->bclk_ratio = 64;
794 i2s->pinctrl = devm_pinctrl_get(dev: &pdev->dev);
795 if (!IS_ERR(ptr: i2s->pinctrl)) {
796 i2s->bclk_on = pinctrl_lookup_state(p: i2s->pinctrl, name: "bclk_on");
797 if (!IS_ERR_OR_NULL(ptr: i2s->bclk_on)) {
798 i2s->bclk_off = pinctrl_lookup_state(p: i2s->pinctrl, name: "bclk_off");
799 if (IS_ERR_OR_NULL(ptr: i2s->bclk_off)) {
800 dev_err(&pdev->dev, "failed to find i2s bclk_off\n");
801 ret = -EINVAL;
802 goto err_clk;
803 }
804 }
805 } else {
806 dev_dbg(&pdev->dev, "failed to find i2s pinctrl\n");
807 }
808
809 i2s_pinctrl_select_bclk_off(i2s);
810
811 dev_set_drvdata(dev: &pdev->dev, data: i2s);
812
813 pm_runtime_enable(dev: &pdev->dev);
814 if (!pm_runtime_enabled(dev: &pdev->dev)) {
815 ret = i2s_runtime_resume(dev: &pdev->dev);
816 if (ret)
817 goto err_pm_disable;
818 }
819
820 ret = rockchip_i2s_init_dai(i2s, res, dp: &dai);
821 if (ret)
822 goto err_pm_disable;
823
824 ret = devm_snd_soc_register_component(dev: &pdev->dev,
825 component_driver: &rockchip_i2s_component,
826 dai_drv: dai, num_dai: 1);
827
828 if (ret) {
829 dev_err(&pdev->dev, "Could not register DAI\n");
830 goto err_suspend;
831 }
832
833 ret = devm_snd_dmaengine_pcm_register(dev: &pdev->dev, NULL, flags: 0);
834 if (ret) {
835 dev_err(&pdev->dev, "Could not register PCM\n");
836 goto err_suspend;
837 }
838
839 return 0;
840
841err_suspend:
842 if (!pm_runtime_status_suspended(dev: &pdev->dev))
843 i2s_runtime_suspend(dev: &pdev->dev);
844err_pm_disable:
845 pm_runtime_disable(dev: &pdev->dev);
846err_clk:
847 clk_disable_unprepare(clk: i2s->hclk);
848 return ret;
849}
850
851static void rockchip_i2s_remove(struct platform_device *pdev)
852{
853 struct rk_i2s_dev *i2s = dev_get_drvdata(dev: &pdev->dev);
854
855 pm_runtime_disable(dev: &pdev->dev);
856 if (!pm_runtime_status_suspended(dev: &pdev->dev))
857 i2s_runtime_suspend(dev: &pdev->dev);
858
859 clk_disable_unprepare(clk: i2s->hclk);
860}
861
862static const struct dev_pm_ops rockchip_i2s_pm_ops = {
863 RUNTIME_PM_OPS(i2s_runtime_suspend, i2s_runtime_resume, NULL)
864};
865
866static struct platform_driver rockchip_i2s_driver = {
867 .probe = rockchip_i2s_probe,
868 .remove = rockchip_i2s_remove,
869 .driver = {
870 .name = DRV_NAME,
871 .of_match_table = of_match_ptr(rockchip_i2s_match),
872 .pm = pm_ptr(&rockchip_i2s_pm_ops),
873 },
874};
875module_platform_driver(rockchip_i2s_driver);
876
877MODULE_DESCRIPTION("ROCKCHIP IIS ASoC Interface");
878MODULE_AUTHOR("jianqun <jay.xu@rock-chips.com>");
879MODULE_LICENSE("GPL v2");
880MODULE_ALIAS("platform:" DRV_NAME);
881MODULE_DEVICE_TABLE(of, rockchip_i2s_match);
882

source code of linux/sound/soc/rockchip/rockchip_i2s.c