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14#include <linux/clk.h>
15#include <linux/dmaengine.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/platform_device.h>
19#include <linux/pm_runtime.h>
20#include <linux/regmap.h>
21#include <linux/reset.h>
22
23#include <sound/dmaengine_pcm.h>
24#include <sound/pcm_params.h>
25#include <sound/soc.h>
26#include <sound/soc-dai.h>
27
28#define SUN4I_I2S_CTRL_REG 0x00
29#define SUN4I_I2S_CTRL_SDO_EN_MASK GENMASK(11, 8)
30#define SUN4I_I2S_CTRL_SDO_EN(sdo) BIT(8 + (sdo))
31#define SUN4I_I2S_CTRL_MODE_MASK BIT(5)
32#define SUN4I_I2S_CTRL_MODE_SLAVE (1 << 5)
33#define SUN4I_I2S_CTRL_MODE_MASTER (0 << 5)
34#define SUN4I_I2S_CTRL_TX_EN BIT(2)
35#define SUN4I_I2S_CTRL_RX_EN BIT(1)
36#define SUN4I_I2S_CTRL_GL_EN BIT(0)
37
38#define SUN4I_I2S_FMT0_REG 0x04
39#define SUN4I_I2S_FMT0_LRCLK_POLARITY_MASK BIT(7)
40#define SUN4I_I2S_FMT0_LRCLK_POLARITY_INVERTED (1 << 7)
41#define SUN4I_I2S_FMT0_LRCLK_POLARITY_NORMAL (0 << 7)
42#define SUN4I_I2S_FMT0_BCLK_POLARITY_MASK BIT(6)
43#define SUN4I_I2S_FMT0_BCLK_POLARITY_INVERTED (1 << 6)
44#define SUN4I_I2S_FMT0_BCLK_POLARITY_NORMAL (0 << 6)
45#define SUN4I_I2S_FMT0_SR_MASK GENMASK(5, 4)
46#define SUN4I_I2S_FMT0_SR(sr) ((sr) << 4)
47#define SUN4I_I2S_FMT0_WSS_MASK GENMASK(3, 2)
48#define SUN4I_I2S_FMT0_WSS(wss) ((wss) << 2)
49#define SUN4I_I2S_FMT0_FMT_MASK GENMASK(1, 0)
50#define SUN4I_I2S_FMT0_FMT_RIGHT_J (2 << 0)
51#define SUN4I_I2S_FMT0_FMT_LEFT_J (1 << 0)
52#define SUN4I_I2S_FMT0_FMT_I2S (0 << 0)
53#define SUN4I_I2S_FMT0_POLARITY_INVERTED (1)
54#define SUN4I_I2S_FMT0_POLARITY_NORMAL (0)
55
56#define SUN4I_I2S_FMT1_REG 0x08
57#define SUN4I_I2S_FIFO_TX_REG 0x0c
58#define SUN4I_I2S_FIFO_RX_REG 0x10
59
60#define SUN4I_I2S_FIFO_CTRL_REG 0x14
61#define SUN4I_I2S_FIFO_CTRL_FLUSH_TX BIT(25)
62#define SUN4I_I2S_FIFO_CTRL_FLUSH_RX BIT(24)
63#define SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK BIT(2)
64#define SUN4I_I2S_FIFO_CTRL_TX_MODE(mode) ((mode) << 2)
65#define SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK GENMASK(1, 0)
66#define SUN4I_I2S_FIFO_CTRL_RX_MODE(mode) (mode)
67
68#define SUN4I_I2S_FIFO_STA_REG 0x18
69
70#define SUN4I_I2S_DMA_INT_CTRL_REG 0x1c
71#define SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN BIT(7)
72#define SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN BIT(3)
73
74#define SUN4I_I2S_INT_STA_REG 0x20
75
76#define SUN4I_I2S_CLK_DIV_REG 0x24
77#define SUN4I_I2S_CLK_DIV_MCLK_EN BIT(7)
78#define SUN4I_I2S_CLK_DIV_BCLK_MASK GENMASK(6, 4)
79#define SUN4I_I2S_CLK_DIV_BCLK(bclk) ((bclk) << 4)
80#define SUN4I_I2S_CLK_DIV_MCLK_MASK GENMASK(3, 0)
81#define SUN4I_I2S_CLK_DIV_MCLK(mclk) ((mclk) << 0)
82
83#define SUN4I_I2S_RX_CNT_REG 0x28
84#define SUN4I_I2S_TX_CNT_REG 0x2c
85
86#define SUN4I_I2S_TX_CHAN_SEL_REG 0x30
87#define SUN4I_I2S_CHAN_SEL(num_chan) (((num_chan) - 1) << 0)
88
89#define SUN4I_I2S_TX_CHAN_MAP_REG 0x34
90#define SUN4I_I2S_TX_CHAN_MAP(chan, sample) ((sample) << (chan << 2))
91
92#define SUN4I_I2S_RX_CHAN_SEL_REG 0x38
93#define SUN4I_I2S_RX_CHAN_MAP_REG 0x3c
94
95
96#define SUN8I_I2S_CTRL_BCLK_OUT BIT(18)
97#define SUN8I_I2S_CTRL_LRCK_OUT BIT(17)
98
99#define SUN8I_I2S_FMT0_LRCK_PERIOD_MASK GENMASK(17, 8)
100#define SUN8I_I2S_FMT0_LRCK_PERIOD(period) ((period - 1) << 8)
101
102#define SUN8I_I2S_INT_STA_REG 0x0c
103#define SUN8I_I2S_FIFO_TX_REG 0x20
104
105#define SUN8I_I2S_CHAN_CFG_REG 0x30
106#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK GENMASK(6, 4)
107#define SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(chan) (chan - 1)
108#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK GENMASK(2, 0)
109#define SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(chan) (chan - 1)
110
111#define SUN8I_I2S_TX_CHAN_MAP_REG 0x44
112#define SUN8I_I2S_TX_CHAN_SEL_REG 0x34
113#define SUN8I_I2S_TX_CHAN_OFFSET_MASK GENMASK(13, 11)
114#define SUN8I_I2S_TX_CHAN_OFFSET(offset) (offset << 12)
115#define SUN8I_I2S_TX_CHAN_EN_MASK GENMASK(11, 4)
116#define SUN8I_I2S_TX_CHAN_EN(num_chan) (((1 << num_chan) - 1) << 4)
117
118#define SUN8I_I2S_RX_CHAN_SEL_REG 0x54
119#define SUN8I_I2S_RX_CHAN_MAP_REG 0x58
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146struct sun4i_i2s_quirks {
147 bool has_reset;
148 bool has_slave_select_bit;
149 bool has_fmt_set_lrck_period;
150 bool has_chcfg;
151 bool has_chsel_tx_chen;
152 bool has_chsel_offset;
153 unsigned int reg_offset_txdata;
154 const struct regmap_config *sun4i_i2s_regmap;
155 unsigned int mclk_offset;
156 unsigned int bclk_offset;
157 unsigned int fmt_offset;
158
159
160 struct reg_field field_clkdiv_mclk_en;
161 struct reg_field field_fmt_wss;
162 struct reg_field field_fmt_sr;
163 struct reg_field field_fmt_bclk;
164 struct reg_field field_fmt_lrclk;
165 struct reg_field field_fmt_mode;
166 struct reg_field field_txchanmap;
167 struct reg_field field_rxchanmap;
168 struct reg_field field_txchansel;
169 struct reg_field field_rxchansel;
170};
171
172struct sun4i_i2s {
173 struct clk *bus_clk;
174 struct clk *mod_clk;
175 struct regmap *regmap;
176 struct reset_control *rst;
177
178 unsigned int mclk_freq;
179
180 struct snd_dmaengine_dai_dma_data capture_dma_data;
181 struct snd_dmaengine_dai_dma_data playback_dma_data;
182
183
184 struct regmap_field *field_clkdiv_mclk_en;
185 struct regmap_field *field_fmt_wss;
186 struct regmap_field *field_fmt_sr;
187 struct regmap_field *field_fmt_bclk;
188 struct regmap_field *field_fmt_lrclk;
189 struct regmap_field *field_fmt_mode;
190 struct regmap_field *field_txchanmap;
191 struct regmap_field *field_rxchanmap;
192 struct regmap_field *field_txchansel;
193 struct regmap_field *field_rxchansel;
194
195 const struct sun4i_i2s_quirks *variant;
196};
197
198struct sun4i_i2s_clk_div {
199 u8 div;
200 u8 val;
201};
202
203static const struct sun4i_i2s_clk_div sun4i_i2s_bclk_div[] = {
204 { .div = 2, .val = 0 },
205 { .div = 4, .val = 1 },
206 { .div = 6, .val = 2 },
207 { .div = 8, .val = 3 },
208 { .div = 12, .val = 4 },
209 { .div = 16, .val = 5 },
210
211};
212
213static const struct sun4i_i2s_clk_div sun4i_i2s_mclk_div[] = {
214 { .div = 1, .val = 0 },
215 { .div = 2, .val = 1 },
216 { .div = 4, .val = 2 },
217 { .div = 6, .val = 3 },
218 { .div = 8, .val = 4 },
219 { .div = 12, .val = 5 },
220 { .div = 16, .val = 6 },
221 { .div = 24, .val = 7 },
222
223};
224
225static int sun4i_i2s_get_bclk_div(struct sun4i_i2s *i2s,
226 unsigned int oversample_rate,
227 unsigned int word_size)
228{
229 int div = oversample_rate / word_size / 2;
230 int i;
231
232 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_bclk_div); i++) {
233 const struct sun4i_i2s_clk_div *bdiv = &sun4i_i2s_bclk_div[i];
234
235 if (bdiv->div == div)
236 return bdiv->val;
237 }
238
239 return -EINVAL;
240}
241
242static int sun4i_i2s_get_mclk_div(struct sun4i_i2s *i2s,
243 unsigned int oversample_rate,
244 unsigned int module_rate,
245 unsigned int sampling_rate)
246{
247 int div = module_rate / sampling_rate / oversample_rate;
248 int i;
249
250 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_mclk_div); i++) {
251 const struct sun4i_i2s_clk_div *mdiv = &sun4i_i2s_mclk_div[i];
252
253 if (mdiv->div == div)
254 return mdiv->val;
255 }
256
257 return -EINVAL;
258}
259
260static int sun4i_i2s_oversample_rates[] = { 128, 192, 256, 384, 512, 768 };
261static bool sun4i_i2s_oversample_is_valid(unsigned int oversample)
262{
263 int i;
264
265 for (i = 0; i < ARRAY_SIZE(sun4i_i2s_oversample_rates); i++)
266 if (sun4i_i2s_oversample_rates[i] == oversample)
267 return true;
268
269 return false;
270}
271
272static int sun4i_i2s_set_clk_rate(struct sun4i_i2s *i2s,
273 unsigned int rate,
274 unsigned int word_size)
275{
276 unsigned int oversample_rate, clk_rate;
277 int bclk_div, mclk_div;
278 int ret;
279
280 switch (rate) {
281 case 176400:
282 case 88200:
283 case 44100:
284 case 22050:
285 case 11025:
286 clk_rate = 22579200;
287 break;
288
289 case 192000:
290 case 128000:
291 case 96000:
292 case 64000:
293 case 48000:
294 case 32000:
295 case 24000:
296 case 16000:
297 case 12000:
298 case 8000:
299 clk_rate = 24576000;
300 break;
301
302 default:
303 return -EINVAL;
304 }
305
306 ret = clk_set_rate(i2s->mod_clk, clk_rate);
307 if (ret)
308 return ret;
309
310 oversample_rate = i2s->mclk_freq / rate;
311 if (!sun4i_i2s_oversample_is_valid(oversample_rate))
312 return -EINVAL;
313
314 bclk_div = sun4i_i2s_get_bclk_div(i2s, oversample_rate,
315 word_size);
316 if (bclk_div < 0)
317 return -EINVAL;
318
319 mclk_div = sun4i_i2s_get_mclk_div(i2s, oversample_rate,
320 clk_rate, rate);
321 if (mclk_div < 0)
322 return -EINVAL;
323
324
325 bclk_div += i2s->variant->bclk_offset;
326 mclk_div += i2s->variant->mclk_offset;
327
328 regmap_write(i2s->regmap, SUN4I_I2S_CLK_DIV_REG,
329 SUN4I_I2S_CLK_DIV_BCLK(bclk_div) |
330 SUN4I_I2S_CLK_DIV_MCLK(mclk_div));
331
332 regmap_field_write(i2s->field_clkdiv_mclk_en, 1);
333
334
335 if (i2s->variant->has_fmt_set_lrck_period)
336 regmap_update_bits(i2s->regmap, SUN4I_I2S_FMT0_REG,
337 SUN8I_I2S_FMT0_LRCK_PERIOD_MASK,
338 SUN8I_I2S_FMT0_LRCK_PERIOD(32));
339
340 return 0;
341}
342
343static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream,
344 struct snd_pcm_hw_params *params,
345 struct snd_soc_dai *dai)
346{
347 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
348 int sr, wss, channels;
349 u32 width;
350
351 channels = params_channels(params);
352 if (channels != 2)
353 return -EINVAL;
354
355 if (i2s->variant->has_chcfg) {
356 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
357 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM_MASK,
358 SUN8I_I2S_CHAN_CFG_TX_SLOT_NUM(channels));
359 regmap_update_bits(i2s->regmap, SUN8I_I2S_CHAN_CFG_REG,
360 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM_MASK,
361 SUN8I_I2S_CHAN_CFG_RX_SLOT_NUM(channels));
362 }
363
364
365 regmap_field_write(i2s->field_txchanmap, 0x76543210);
366 regmap_field_write(i2s->field_rxchanmap, 0x00003210);
367
368
369 regmap_field_write(i2s->field_txchansel,
370 SUN4I_I2S_CHAN_SEL(params_channels(params)));
371
372 regmap_field_write(i2s->field_rxchansel,
373 SUN4I_I2S_CHAN_SEL(params_channels(params)));
374
375 if (i2s->variant->has_chsel_tx_chen)
376 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
377 SUN8I_I2S_TX_CHAN_EN_MASK,
378 SUN8I_I2S_TX_CHAN_EN(channels));
379
380 switch (params_physical_width(params)) {
381 case 16:
382 width = DMA_SLAVE_BUSWIDTH_2_BYTES;
383 break;
384 default:
385 return -EINVAL;
386 }
387 i2s->playback_dma_data.addr_width = width;
388
389 switch (params_width(params)) {
390 case 16:
391 sr = 0;
392 wss = 0;
393 break;
394
395 default:
396 return -EINVAL;
397 }
398
399 regmap_field_write(i2s->field_fmt_wss,
400 wss + i2s->variant->fmt_offset);
401 regmap_field_write(i2s->field_fmt_sr,
402 sr + i2s->variant->fmt_offset);
403
404 return sun4i_i2s_set_clk_rate(i2s, params_rate(params),
405 params_width(params));
406}
407
408static int sun4i_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
409{
410 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
411 u32 val;
412 u32 offset = 0;
413 u32 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
414 u32 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_NORMAL;
415
416
417 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
418 case SND_SOC_DAIFMT_I2S:
419 val = SUN4I_I2S_FMT0_FMT_I2S;
420 offset = 1;
421 break;
422 case SND_SOC_DAIFMT_LEFT_J:
423 val = SUN4I_I2S_FMT0_FMT_LEFT_J;
424 break;
425 case SND_SOC_DAIFMT_RIGHT_J:
426 val = SUN4I_I2S_FMT0_FMT_RIGHT_J;
427 break;
428 default:
429 return -EINVAL;
430 }
431
432 if (i2s->variant->has_chsel_offset) {
433
434
435
436
437
438
439 if (offset > 0)
440 val++;
441
442 regmap_update_bits(i2s->regmap, SUN8I_I2S_TX_CHAN_SEL_REG,
443 SUN8I_I2S_TX_CHAN_OFFSET_MASK,
444 SUN8I_I2S_TX_CHAN_OFFSET(offset));
445 }
446
447 regmap_field_write(i2s->field_fmt_mode, val);
448
449
450 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
451 case SND_SOC_DAIFMT_IB_IF:
452
453 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
454 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
455 break;
456 case SND_SOC_DAIFMT_IB_NF:
457
458 bclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
459 break;
460 case SND_SOC_DAIFMT_NB_IF:
461
462 lrclk_polarity = SUN4I_I2S_FMT0_POLARITY_INVERTED;
463 break;
464 case SND_SOC_DAIFMT_NB_NF:
465 break;
466 default:
467 return -EINVAL;
468 }
469
470 regmap_field_write(i2s->field_fmt_bclk, bclk_polarity);
471 regmap_field_write(i2s->field_fmt_lrclk, lrclk_polarity);
472
473 if (i2s->variant->has_slave_select_bit) {
474
475 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
476 case SND_SOC_DAIFMT_CBS_CFS:
477
478 val = SUN4I_I2S_CTRL_MODE_MASTER;
479 break;
480 case SND_SOC_DAIFMT_CBM_CFM:
481
482 val = SUN4I_I2S_CTRL_MODE_SLAVE;
483 break;
484 default:
485 return -EINVAL;
486 }
487 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
488 SUN4I_I2S_CTRL_MODE_MASK,
489 val);
490 } else {
491
492
493
494
495
496 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
497 case SND_SOC_DAIFMT_CBS_CFS:
498
499 val = SUN8I_I2S_CTRL_BCLK_OUT |
500 SUN8I_I2S_CTRL_LRCK_OUT;
501 break;
502 case SND_SOC_DAIFMT_CBM_CFM:
503
504 val = 0;
505 break;
506 default:
507 return -EINVAL;
508 }
509 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
510 SUN8I_I2S_CTRL_BCLK_OUT |
511 SUN8I_I2S_CTRL_LRCK_OUT,
512 val);
513 }
514
515
516 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
517 SUN4I_I2S_FIFO_CTRL_TX_MODE_MASK |
518 SUN4I_I2S_FIFO_CTRL_RX_MODE_MASK,
519 SUN4I_I2S_FIFO_CTRL_TX_MODE(1) |
520 SUN4I_I2S_FIFO_CTRL_RX_MODE(1));
521 return 0;
522}
523
524static void sun4i_i2s_start_capture(struct sun4i_i2s *i2s)
525{
526
527 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
528 SUN4I_I2S_FIFO_CTRL_FLUSH_RX,
529 SUN4I_I2S_FIFO_CTRL_FLUSH_RX);
530
531
532 regmap_write(i2s->regmap, SUN4I_I2S_RX_CNT_REG, 0);
533
534
535 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
536 SUN4I_I2S_CTRL_RX_EN,
537 SUN4I_I2S_CTRL_RX_EN);
538
539
540 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
541 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
542 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN);
543}
544
545static void sun4i_i2s_start_playback(struct sun4i_i2s *i2s)
546{
547
548 regmap_update_bits(i2s->regmap, SUN4I_I2S_FIFO_CTRL_REG,
549 SUN4I_I2S_FIFO_CTRL_FLUSH_TX,
550 SUN4I_I2S_FIFO_CTRL_FLUSH_TX);
551
552
553 regmap_write(i2s->regmap, SUN4I_I2S_TX_CNT_REG, 0);
554
555
556 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
557 SUN4I_I2S_CTRL_TX_EN,
558 SUN4I_I2S_CTRL_TX_EN);
559
560
561 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
562 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
563 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN);
564}
565
566static void sun4i_i2s_stop_capture(struct sun4i_i2s *i2s)
567{
568
569 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
570 SUN4I_I2S_CTRL_RX_EN,
571 0);
572
573
574 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
575 SUN4I_I2S_DMA_INT_CTRL_RX_DRQ_EN,
576 0);
577}
578
579static void sun4i_i2s_stop_playback(struct sun4i_i2s *i2s)
580{
581
582 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
583 SUN4I_I2S_CTRL_TX_EN,
584 0);
585
586
587 regmap_update_bits(i2s->regmap, SUN4I_I2S_DMA_INT_CTRL_REG,
588 SUN4I_I2S_DMA_INT_CTRL_TX_DRQ_EN,
589 0);
590}
591
592static int sun4i_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
593 struct snd_soc_dai *dai)
594{
595 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
596
597 switch (cmd) {
598 case SNDRV_PCM_TRIGGER_START:
599 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
600 case SNDRV_PCM_TRIGGER_RESUME:
601 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
602 sun4i_i2s_start_playback(i2s);
603 else
604 sun4i_i2s_start_capture(i2s);
605 break;
606
607 case SNDRV_PCM_TRIGGER_STOP:
608 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
609 case SNDRV_PCM_TRIGGER_SUSPEND:
610 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
611 sun4i_i2s_stop_playback(i2s);
612 else
613 sun4i_i2s_stop_capture(i2s);
614 break;
615
616 default:
617 return -EINVAL;
618 }
619
620 return 0;
621}
622
623static int sun4i_i2s_startup(struct snd_pcm_substream *substream,
624 struct snd_soc_dai *dai)
625{
626 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
627
628
629 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
630 SUN4I_I2S_CTRL_GL_EN, SUN4I_I2S_CTRL_GL_EN);
631
632
633 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
634 SUN4I_I2S_CTRL_SDO_EN_MASK,
635 SUN4I_I2S_CTRL_SDO_EN(0));
636
637
638 return clk_prepare_enable(i2s->mod_clk);
639}
640
641static void sun4i_i2s_shutdown(struct snd_pcm_substream *substream,
642 struct snd_soc_dai *dai)
643{
644 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
645
646 clk_disable_unprepare(i2s->mod_clk);
647
648
649 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
650 SUN4I_I2S_CTRL_SDO_EN_MASK, 0);
651
652
653 regmap_update_bits(i2s->regmap, SUN4I_I2S_CTRL_REG,
654 SUN4I_I2S_CTRL_GL_EN, 0);
655}
656
657static int sun4i_i2s_set_sysclk(struct snd_soc_dai *dai, int clk_id,
658 unsigned int freq, int dir)
659{
660 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
661
662 if (clk_id != 0)
663 return -EINVAL;
664
665 i2s->mclk_freq = freq;
666
667 return 0;
668}
669
670static const struct snd_soc_dai_ops sun4i_i2s_dai_ops = {
671 .hw_params = sun4i_i2s_hw_params,
672 .set_fmt = sun4i_i2s_set_fmt,
673 .set_sysclk = sun4i_i2s_set_sysclk,
674 .shutdown = sun4i_i2s_shutdown,
675 .startup = sun4i_i2s_startup,
676 .trigger = sun4i_i2s_trigger,
677};
678
679static int sun4i_i2s_dai_probe(struct snd_soc_dai *dai)
680{
681 struct sun4i_i2s *i2s = snd_soc_dai_get_drvdata(dai);
682
683 snd_soc_dai_init_dma_data(dai,
684 &i2s->playback_dma_data,
685 &i2s->capture_dma_data);
686
687 snd_soc_dai_set_drvdata(dai, i2s);
688
689 return 0;
690}
691
692static struct snd_soc_dai_driver sun4i_i2s_dai = {
693 .probe = sun4i_i2s_dai_probe,
694 .capture = {
695 .stream_name = "Capture",
696 .channels_min = 2,
697 .channels_max = 2,
698 .rates = SNDRV_PCM_RATE_8000_192000,
699 .formats = SNDRV_PCM_FMTBIT_S16_LE,
700 },
701 .playback = {
702 .stream_name = "Playback",
703 .channels_min = 2,
704 .channels_max = 2,
705 .rates = SNDRV_PCM_RATE_8000_192000,
706 .formats = SNDRV_PCM_FMTBIT_S16_LE,
707 },
708 .ops = &sun4i_i2s_dai_ops,
709 .symmetric_rates = 1,
710};
711
712static const struct snd_soc_component_driver sun4i_i2s_component = {
713 .name = "sun4i-dai",
714};
715
716static bool sun4i_i2s_rd_reg(struct device *dev, unsigned int reg)
717{
718 switch (reg) {
719 case SUN4I_I2S_FIFO_TX_REG:
720 return false;
721
722 default:
723 return true;
724 }
725}
726
727static bool sun4i_i2s_wr_reg(struct device *dev, unsigned int reg)
728{
729 switch (reg) {
730 case SUN4I_I2S_FIFO_RX_REG:
731 case SUN4I_I2S_FIFO_STA_REG:
732 return false;
733
734 default:
735 return true;
736 }
737}
738
739static bool sun4i_i2s_volatile_reg(struct device *dev, unsigned int reg)
740{
741 switch (reg) {
742 case SUN4I_I2S_FIFO_RX_REG:
743 case SUN4I_I2S_INT_STA_REG:
744 case SUN4I_I2S_RX_CNT_REG:
745 case SUN4I_I2S_TX_CNT_REG:
746 return true;
747
748 default:
749 return false;
750 }
751}
752
753static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
754{
755 switch (reg) {
756 case SUN8I_I2S_FIFO_TX_REG:
757 return false;
758
759 default:
760 return true;
761 }
762}
763
764static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
765{
766 if (reg == SUN8I_I2S_INT_STA_REG)
767 return true;
768 if (reg == SUN8I_I2S_FIFO_TX_REG)
769 return false;
770
771 return sun4i_i2s_volatile_reg(dev, reg);
772}
773
774static const struct reg_default sun4i_i2s_reg_defaults[] = {
775 { SUN4I_I2S_CTRL_REG, 0x00000000 },
776 { SUN4I_I2S_FMT0_REG, 0x0000000c },
777 { SUN4I_I2S_FMT1_REG, 0x00004020 },
778 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
779 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
780 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
781 { SUN4I_I2S_TX_CHAN_SEL_REG, 0x00000001 },
782 { SUN4I_I2S_TX_CHAN_MAP_REG, 0x76543210 },
783 { SUN4I_I2S_RX_CHAN_SEL_REG, 0x00000001 },
784 { SUN4I_I2S_RX_CHAN_MAP_REG, 0x00003210 },
785};
786
787static const struct reg_default sun8i_i2s_reg_defaults[] = {
788 { SUN4I_I2S_CTRL_REG, 0x00060000 },
789 { SUN4I_I2S_FMT0_REG, 0x00000033 },
790 { SUN4I_I2S_FMT1_REG, 0x00000030 },
791 { SUN4I_I2S_FIFO_CTRL_REG, 0x000400f0 },
792 { SUN4I_I2S_DMA_INT_CTRL_REG, 0x00000000 },
793 { SUN4I_I2S_CLK_DIV_REG, 0x00000000 },
794 { SUN8I_I2S_CHAN_CFG_REG, 0x00000000 },
795 { SUN8I_I2S_TX_CHAN_SEL_REG, 0x00000000 },
796 { SUN8I_I2S_TX_CHAN_MAP_REG, 0x00000000 },
797 { SUN8I_I2S_RX_CHAN_SEL_REG, 0x00000000 },
798 { SUN8I_I2S_RX_CHAN_MAP_REG, 0x00000000 },
799};
800
801static const struct regmap_config sun4i_i2s_regmap_config = {
802 .reg_bits = 32,
803 .reg_stride = 4,
804 .val_bits = 32,
805 .max_register = SUN4I_I2S_RX_CHAN_MAP_REG,
806
807 .cache_type = REGCACHE_FLAT,
808 .reg_defaults = sun4i_i2s_reg_defaults,
809 .num_reg_defaults = ARRAY_SIZE(sun4i_i2s_reg_defaults),
810 .writeable_reg = sun4i_i2s_wr_reg,
811 .readable_reg = sun4i_i2s_rd_reg,
812 .volatile_reg = sun4i_i2s_volatile_reg,
813};
814
815static const struct regmap_config sun8i_i2s_regmap_config = {
816 .reg_bits = 32,
817 .reg_stride = 4,
818 .val_bits = 32,
819 .max_register = SUN8I_I2S_RX_CHAN_MAP_REG,
820 .cache_type = REGCACHE_FLAT,
821 .reg_defaults = sun8i_i2s_reg_defaults,
822 .num_reg_defaults = ARRAY_SIZE(sun8i_i2s_reg_defaults),
823 .writeable_reg = sun4i_i2s_wr_reg,
824 .readable_reg = sun8i_i2s_rd_reg,
825 .volatile_reg = sun8i_i2s_volatile_reg,
826};
827
828static int sun4i_i2s_runtime_resume(struct device *dev)
829{
830 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
831 int ret;
832
833 ret = clk_prepare_enable(i2s->bus_clk);
834 if (ret) {
835 dev_err(dev, "Failed to enable bus clock\n");
836 return ret;
837 }
838
839 regcache_cache_only(i2s->regmap, false);
840 regcache_mark_dirty(i2s->regmap);
841
842 ret = regcache_sync(i2s->regmap);
843 if (ret) {
844 dev_err(dev, "Failed to sync regmap cache\n");
845 goto err_disable_clk;
846 }
847
848 return 0;
849
850err_disable_clk:
851 clk_disable_unprepare(i2s->bus_clk);
852 return ret;
853}
854
855static int sun4i_i2s_runtime_suspend(struct device *dev)
856{
857 struct sun4i_i2s *i2s = dev_get_drvdata(dev);
858
859 regcache_cache_only(i2s->regmap, true);
860
861 clk_disable_unprepare(i2s->bus_clk);
862
863 return 0;
864}
865
866static const struct sun4i_i2s_quirks sun4i_a10_i2s_quirks = {
867 .has_reset = false,
868 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
869 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
870 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
871 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
872 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
873 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
874 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
875 .has_slave_select_bit = true,
876 .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
877 .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
878 .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
879 .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
880 .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
881};
882
883static const struct sun4i_i2s_quirks sun6i_a31_i2s_quirks = {
884 .has_reset = true,
885 .reg_offset_txdata = SUN4I_I2S_FIFO_TX_REG,
886 .sun4i_i2s_regmap = &sun4i_i2s_regmap_config,
887 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 7, 7),
888 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 2, 3),
889 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 5),
890 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 6, 6),
891 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
892 .has_slave_select_bit = true,
893 .field_fmt_mode = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 1),
894 .field_txchanmap = REG_FIELD(SUN4I_I2S_TX_CHAN_MAP_REG, 0, 31),
895 .field_rxchanmap = REG_FIELD(SUN4I_I2S_RX_CHAN_MAP_REG, 0, 31),
896 .field_txchansel = REG_FIELD(SUN4I_I2S_TX_CHAN_SEL_REG, 0, 2),
897 .field_rxchansel = REG_FIELD(SUN4I_I2S_RX_CHAN_SEL_REG, 0, 2),
898};
899
900static const struct sun4i_i2s_quirks sun8i_h3_i2s_quirks = {
901 .has_reset = true,
902 .reg_offset_txdata = SUN8I_I2S_FIFO_TX_REG,
903 .sun4i_i2s_regmap = &sun8i_i2s_regmap_config,
904 .mclk_offset = 1,
905 .bclk_offset = 2,
906 .fmt_offset = 3,
907 .has_fmt_set_lrck_period = true,
908 .has_chcfg = true,
909 .has_chsel_tx_chen = true,
910 .has_chsel_offset = true,
911 .field_clkdiv_mclk_en = REG_FIELD(SUN4I_I2S_CLK_DIV_REG, 8, 8),
912 .field_fmt_wss = REG_FIELD(SUN4I_I2S_FMT0_REG, 0, 2),
913 .field_fmt_sr = REG_FIELD(SUN4I_I2S_FMT0_REG, 4, 6),
914 .field_fmt_bclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 7, 7),
915 .field_fmt_lrclk = REG_FIELD(SUN4I_I2S_FMT0_REG, 19, 19),
916 .field_fmt_mode = REG_FIELD(SUN4I_I2S_CTRL_REG, 4, 5),
917 .field_txchanmap = REG_FIELD(SUN8I_I2S_TX_CHAN_MAP_REG, 0, 31),
918 .field_rxchanmap = REG_FIELD(SUN8I_I2S_RX_CHAN_MAP_REG, 0, 31),
919 .field_txchansel = REG_FIELD(SUN8I_I2S_TX_CHAN_SEL_REG, 0, 2),
920 .field_rxchansel = REG_FIELD(SUN8I_I2S_RX_CHAN_SEL_REG, 0, 2),
921};
922
923static int sun4i_i2s_init_regmap_fields(struct device *dev,
924 struct sun4i_i2s *i2s)
925{
926 i2s->field_clkdiv_mclk_en =
927 devm_regmap_field_alloc(dev, i2s->regmap,
928 i2s->variant->field_clkdiv_mclk_en);
929 if (IS_ERR(i2s->field_clkdiv_mclk_en))
930 return PTR_ERR(i2s->field_clkdiv_mclk_en);
931
932 i2s->field_fmt_wss =
933 devm_regmap_field_alloc(dev, i2s->regmap,
934 i2s->variant->field_fmt_wss);
935 if (IS_ERR(i2s->field_fmt_wss))
936 return PTR_ERR(i2s->field_fmt_wss);
937
938 i2s->field_fmt_sr =
939 devm_regmap_field_alloc(dev, i2s->regmap,
940 i2s->variant->field_fmt_sr);
941 if (IS_ERR(i2s->field_fmt_sr))
942 return PTR_ERR(i2s->field_fmt_sr);
943
944 i2s->field_fmt_bclk =
945 devm_regmap_field_alloc(dev, i2s->regmap,
946 i2s->variant->field_fmt_bclk);
947 if (IS_ERR(i2s->field_fmt_bclk))
948 return PTR_ERR(i2s->field_fmt_bclk);
949
950 i2s->field_fmt_lrclk =
951 devm_regmap_field_alloc(dev, i2s->regmap,
952 i2s->variant->field_fmt_lrclk);
953 if (IS_ERR(i2s->field_fmt_lrclk))
954 return PTR_ERR(i2s->field_fmt_lrclk);
955
956 i2s->field_fmt_mode =
957 devm_regmap_field_alloc(dev, i2s->regmap,
958 i2s->variant->field_fmt_mode);
959 if (IS_ERR(i2s->field_fmt_mode))
960 return PTR_ERR(i2s->field_fmt_mode);
961
962 i2s->field_txchanmap =
963 devm_regmap_field_alloc(dev, i2s->regmap,
964 i2s->variant->field_txchanmap);
965 if (IS_ERR(i2s->field_txchanmap))
966 return PTR_ERR(i2s->field_txchanmap);
967
968 i2s->field_rxchanmap =
969 devm_regmap_field_alloc(dev, i2s->regmap,
970 i2s->variant->field_rxchanmap);
971 if (IS_ERR(i2s->field_rxchanmap))
972 return PTR_ERR(i2s->field_rxchanmap);
973
974 i2s->field_txchansel =
975 devm_regmap_field_alloc(dev, i2s->regmap,
976 i2s->variant->field_txchansel);
977 if (IS_ERR(i2s->field_txchansel))
978 return PTR_ERR(i2s->field_txchansel);
979
980 i2s->field_rxchansel =
981 devm_regmap_field_alloc(dev, i2s->regmap,
982 i2s->variant->field_rxchansel);
983 return PTR_ERR_OR_ZERO(i2s->field_rxchansel);
984}
985
986static int sun4i_i2s_probe(struct platform_device *pdev)
987{
988 struct sun4i_i2s *i2s;
989 struct resource *res;
990 void __iomem *regs;
991 int irq, ret;
992
993 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
994 if (!i2s)
995 return -ENOMEM;
996 platform_set_drvdata(pdev, i2s);
997
998 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
999 regs = devm_ioremap_resource(&pdev->dev, res);
1000 if (IS_ERR(regs))
1001 return PTR_ERR(regs);
1002
1003 irq = platform_get_irq(pdev, 0);
1004 if (irq < 0) {
1005 dev_err(&pdev->dev, "Can't retrieve our interrupt\n");
1006 return irq;
1007 }
1008
1009 i2s->variant = of_device_get_match_data(&pdev->dev);
1010 if (!i2s->variant) {
1011 dev_err(&pdev->dev, "Failed to determine the quirks to use\n");
1012 return -ENODEV;
1013 }
1014
1015 i2s->bus_clk = devm_clk_get(&pdev->dev, "apb");
1016 if (IS_ERR(i2s->bus_clk)) {
1017 dev_err(&pdev->dev, "Can't get our bus clock\n");
1018 return PTR_ERR(i2s->bus_clk);
1019 }
1020
1021 i2s->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
1022 i2s->variant->sun4i_i2s_regmap);
1023 if (IS_ERR(i2s->regmap)) {
1024 dev_err(&pdev->dev, "Regmap initialisation failed\n");
1025 return PTR_ERR(i2s->regmap);
1026 }
1027
1028 i2s->mod_clk = devm_clk_get(&pdev->dev, "mod");
1029 if (IS_ERR(i2s->mod_clk)) {
1030 dev_err(&pdev->dev, "Can't get our mod clock\n");
1031 return PTR_ERR(i2s->mod_clk);
1032 }
1033
1034 if (i2s->variant->has_reset) {
1035 i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
1036 if (IS_ERR(i2s->rst)) {
1037 dev_err(&pdev->dev, "Failed to get reset control\n");
1038 return PTR_ERR(i2s->rst);
1039 }
1040 }
1041
1042 if (!IS_ERR(i2s->rst)) {
1043 ret = reset_control_deassert(i2s->rst);
1044 if (ret) {
1045 dev_err(&pdev->dev,
1046 "Failed to deassert the reset control\n");
1047 return -EINVAL;
1048 }
1049 }
1050
1051 i2s->playback_dma_data.addr = res->start +
1052 i2s->variant->reg_offset_txdata;
1053 i2s->playback_dma_data.maxburst = 8;
1054
1055 i2s->capture_dma_data.addr = res->start + SUN4I_I2S_FIFO_RX_REG;
1056 i2s->capture_dma_data.maxburst = 8;
1057
1058 pm_runtime_enable(&pdev->dev);
1059 if (!pm_runtime_enabled(&pdev->dev)) {
1060 ret = sun4i_i2s_runtime_resume(&pdev->dev);
1061 if (ret)
1062 goto err_pm_disable;
1063 }
1064
1065 ret = devm_snd_soc_register_component(&pdev->dev,
1066 &sun4i_i2s_component,
1067 &sun4i_i2s_dai, 1);
1068 if (ret) {
1069 dev_err(&pdev->dev, "Could not register DAI\n");
1070 goto err_suspend;
1071 }
1072
1073 ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
1074 if (ret) {
1075 dev_err(&pdev->dev, "Could not register PCM\n");
1076 goto err_suspend;
1077 }
1078
1079 ret = sun4i_i2s_init_regmap_fields(&pdev->dev, i2s);
1080 if (ret) {
1081 dev_err(&pdev->dev, "Could not initialise regmap fields\n");
1082 goto err_suspend;
1083 }
1084
1085 return 0;
1086
1087err_suspend:
1088 if (!pm_runtime_status_suspended(&pdev->dev))
1089 sun4i_i2s_runtime_suspend(&pdev->dev);
1090err_pm_disable:
1091 pm_runtime_disable(&pdev->dev);
1092 if (!IS_ERR(i2s->rst))
1093 reset_control_assert(i2s->rst);
1094
1095 return ret;
1096}
1097
1098static int sun4i_i2s_remove(struct platform_device *pdev)
1099{
1100 struct sun4i_i2s *i2s = dev_get_drvdata(&pdev->dev);
1101
1102 snd_dmaengine_pcm_unregister(&pdev->dev);
1103
1104 pm_runtime_disable(&pdev->dev);
1105 if (!pm_runtime_status_suspended(&pdev->dev))
1106 sun4i_i2s_runtime_suspend(&pdev->dev);
1107
1108 if (!IS_ERR(i2s->rst))
1109 reset_control_assert(i2s->rst);
1110
1111 return 0;
1112}
1113
1114static const struct of_device_id sun4i_i2s_match[] = {
1115 {
1116 .compatible = "allwinner,sun4i-a10-i2s",
1117 .data = &sun4i_a10_i2s_quirks,
1118 },
1119 {
1120 .compatible = "allwinner,sun6i-a31-i2s",
1121 .data = &sun6i_a31_i2s_quirks,
1122 },
1123 {
1124 .compatible = "allwinner,sun8i-h3-i2s",
1125 .data = &sun8i_h3_i2s_quirks,
1126 },
1127 {}
1128};
1129MODULE_DEVICE_TABLE(of, sun4i_i2s_match);
1130
1131static const struct dev_pm_ops sun4i_i2s_pm_ops = {
1132 .runtime_resume = sun4i_i2s_runtime_resume,
1133 .runtime_suspend = sun4i_i2s_runtime_suspend,
1134};
1135
1136static struct platform_driver sun4i_i2s_driver = {
1137 .probe = sun4i_i2s_probe,
1138 .remove = sun4i_i2s_remove,
1139 .driver = {
1140 .name = "sun4i-i2s",
1141 .of_match_table = sun4i_i2s_match,
1142 .pm = &sun4i_i2s_pm_ops,
1143 },
1144};
1145module_platform_driver(sun4i_i2s_driver);
1146
1147MODULE_AUTHOR("Andrea Venturi <be17068@iperbole.bo.it>");
1148MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
1149MODULE_DESCRIPTION("Allwinner A10 I2S driver");
1150MODULE_LICENSE("GPL");
1151
