1// SPDX-License-Identifier: GPL-2.0
2//
3// ak4613.c -- Asahi Kasei ALSA Soc Audio driver
4//
5// Copyright (C) 2015 Renesas Electronics Corporation
6// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7//
8// Based on ak4642.c by Kuninori Morimoto
9// Based on wm8731.c by Richard Purdie
10// Based on ak4535.c by Richard Purdie
11// Based on wm8753.c by Liam Girdwood
12
13/*
14 * +-------+
15 * |AK4613 |
16 * SDTO1 <-| |
17 * | |
18 * SDTI1 ->| |
19 * SDTI2 ->| |
20 * SDTI3 ->| |
21 * +-------+
22 *
23 * +---+
24 * clk | |___________________________________________...
25 *
26 * [TDM512]
27 * SDTO1 [L1][R1][L2][R2]
28 * SDTI1 [L1][R1][L2][R2][L3][R3][L4][R4][L5][R5][L6][R6]
29 *
30 * [TDM256]
31 * SDTO1 [L1][R1][L2][R2]
32 * SDTI1 [L1][R1][L2][R2][L3][R3][L4][R4]
33 * SDTI2 [L5][R5][L6][R6]
34 *
35 * [TDM128]
36 * SDTO1 [L1][R1][L2][R2]
37 * SDTI1 [L1][R1][L2][R2]
38 * SDTI2 [L3][R3][L4][R4]
39 * SDTI3 [L5][R5][L6][R6]
40 *
41 * [STEREO]
42 * Playback 2ch : SDTI1
43 * Capture 2ch : SDTO1
44 *
45 * [TDM512]
46 * Playback 12ch : SDTI1
47 * Capture 4ch : SDTO1
48 *
49 * [TDM256]
50 * Playback 12ch : SDTI1 + SDTI2
51 * Playback 8ch : SDTI1
52 * Capture 4ch : SDTO1
53 *
54 * [TDM128]
55 * Playback 12ch : SDTI1 + SDTI2 + SDTI3
56 * Playback 8ch : SDTI1 + SDTI2
57 * Playback 4ch : SDTI1
58 * Capture 4ch : SDTO1
59 *
60 *
61 * !!! NOTE !!!
62 *
63 * Renesas is the only user of ak4613 on upstream so far,
64 * but the chip connection is like below.
65 * Thus, Renesas can't test all connection case.
66 * Tested TDM is very limited.
67 *
68 * +-----+ +-----------+
69 * | SoC | | AK4613 |
70 * | |<-----|SDTO1 IN1|<-- Mic
71 * | | | IN2|
72 * | | | |
73 * | |----->|SDTI1 OUT1|--> Headphone
74 * +-----+ |SDTI2 OUT2|
75 * |SDTI3 OUT3|
76 * | OUT4|
77 * | OUT5|
78 * | OUT6|
79 * +-----------+
80 *
81 * Renesas SoC can handle [2, 6,8] channels.
82 * Ak4613 can handle [2,4, 8,12] channels.
83 *
84 * Because of above HW connection and available channels number,
85 * Renesas could test are ...
86 *
87 * [STEREO] Playback 2ch : SDTI1
88 * Capture 2ch : SDTO1
89 * [TDM256] Playback 8ch : SDTI1 (*)
90 *
91 * (*) it used 8ch data between SoC <-> AK4613 on TDM256 mode,
92 * but could confirm is only first 2ch because only 1
93 * Headphone is connected.
94 *
95 * see
96 * AK4613_ENABLE_TDM_TEST
97 */
98#include <linux/clk.h>
99#include <linux/delay.h>
100#include <linux/i2c.h>
101#include <linux/slab.h>
102#include <linux/of.h>
103#include <linux/of_graph.h>
104#include <linux/module.h>
105#include <linux/regmap.h>
106#include <sound/soc.h>
107#include <sound/pcm_params.h>
108#include <sound/tlv.h>
109
110#define PW_MGMT1 0x00 /* Power Management 1 */
111#define PW_MGMT2 0x01 /* Power Management 2 */
112#define PW_MGMT3 0x02 /* Power Management 3 */
113#define CTRL1 0x03 /* Control 1 */
114#define CTRL2 0x04 /* Control 2 */
115#define DEMP1 0x05 /* De-emphasis1 */
116#define DEMP2 0x06 /* De-emphasis2 */
117#define OFD 0x07 /* Overflow Detect */
118#define ZRD 0x08 /* Zero Detect */
119#define ICTRL 0x09 /* Input Control */
120#define OCTRL 0x0a /* Output Control */
121#define LOUT1 0x0b /* LOUT1 Volume Control */
122#define ROUT1 0x0c /* ROUT1 Volume Control */
123#define LOUT2 0x0d /* LOUT2 Volume Control */
124#define ROUT2 0x0e /* ROUT2 Volume Control */
125#define LOUT3 0x0f /* LOUT3 Volume Control */
126#define ROUT3 0x10 /* ROUT3 Volume Control */
127#define LOUT4 0x11 /* LOUT4 Volume Control */
128#define ROUT4 0x12 /* ROUT4 Volume Control */
129#define LOUT5 0x13 /* LOUT5 Volume Control */
130#define ROUT5 0x14 /* ROUT5 Volume Control */
131#define LOUT6 0x15 /* LOUT6 Volume Control */
132#define ROUT6 0x16 /* ROUT6 Volume Control */
133
134/* PW_MGMT1 */
135#define RSTN BIT(0)
136#define PMDAC BIT(1)
137#define PMADC BIT(2)
138#define PMVR BIT(3)
139
140/* PW_MGMT2 */
141#define PMAD_ALL 0x7
142
143/* PW_MGMT3 */
144#define PMDA_ALL 0x3f
145
146/* CTRL1 */
147#define DIF0 BIT(3)
148#define DIF1 BIT(4)
149#define DIF2 BIT(5)
150#define TDM0 BIT(6)
151#define TDM1 BIT(7)
152#define NO_FMT (0xff)
153#define FMT_MASK (0xf8)
154
155/* CTRL2 */
156#define DFS_MASK (3 << 2)
157#define DFS_NORMAL_SPEED (0 << 2)
158#define DFS_DOUBLE_SPEED (1 << 2)
159#define DFS_QUAD_SPEED (2 << 2)
160
161/* ICTRL */
162#define ICTRL_MASK (0x3)
163
164/* OCTRL */
165#define OCTRL_MASK (0x3F)
166
167/*
168 * configs
169 *
170 * 0x000000BA
171 *
172 * B : AK4613_CONFIG_SDTI_x
173 * A : AK4613_CONFIG_MODE_x
174 */
175#define AK4613_CONFIG_SET(priv, x) priv->configs |= AK4613_CONFIG_##x
176#define AK4613_CONFIG_GET(priv, x) (priv->configs & AK4613_CONFIG_##x##_MASK)
177
178/*
179 * AK4613_CONFIG_SDTI_x
180 *
181 * It indicates how many SDTIx is connected.
182 */
183#define AK4613_CONFIG_SDTI_MASK (0xF << 4)
184#define AK4613_CONFIG_SDTI(x) (((x) & 0xF) << 4)
185#define AK4613_CONFIG_SDTI_set(priv, x) AK4613_CONFIG_SET(priv, SDTI(x))
186#define AK4613_CONFIG_SDTI_get(priv) ((AK4613_CONFIG_GET(priv, SDTI) >> 4) & 0xF)
187
188/*
189 * AK4613_CONFIG_MODE_x
190 *
191 * Same as Ctrl1 :: TDM1/TDM0
192 * No shift is requested
193 * see
194 * AK4613_CTRL1_TO_MODE()
195 * Table 11/12/13/14
196 */
197#define AK4613_CONFIG_MODE_MASK (0xF)
198#define AK4613_CONFIG_MODE_STEREO (0x0)
199#define AK4613_CONFIG_MODE_TDM512 (0x1)
200#define AK4613_CONFIG_MODE_TDM256 (0x2)
201#define AK4613_CONFIG_MODE_TDM128 (0x3)
202
203/*
204 * !!!! FIXME !!!!
205 *
206 * Because of testable HW limitation, TDM256 8ch TDM was only tested.
207 * This driver uses AK4613_ENABLE_TDM_TEST instead of new DT property so far.
208 * Don't hesitate to update driver, you don't need to care compatible
209 * with Renesas.
210 *
211 * #define AK4613_ENABLE_TDM_TEST
212 */
213
214struct ak4613_interface {
215 unsigned int width;
216 unsigned int fmt;
217 u8 dif;
218};
219
220struct ak4613_priv {
221 struct mutex lock;
222 struct snd_pcm_hw_constraint_list constraint_rates;
223 struct snd_pcm_hw_constraint_list constraint_channels;
224 struct work_struct dummy_write_work;
225 struct snd_soc_component *component;
226 unsigned int rate;
227 unsigned int sysclk;
228
229 unsigned int fmt;
230 unsigned int configs;
231 int cnt;
232 u8 ctrl1;
233 u8 oc;
234 u8 ic;
235};
236
237/*
238 * Playback Volume
239 *
240 * max : 0x00 : 0 dB
241 * ( 0.5 dB step )
242 * min : 0xFE : -127.0 dB
243 * mute: 0xFF
244 */
245static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);
246
247static const struct snd_kcontrol_new ak4613_snd_controls[] = {
248 SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
249 0, 0xFF, 1, out_tlv),
250 SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
251 0, 0xFF, 1, out_tlv),
252 SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
253 0, 0xFF, 1, out_tlv),
254 SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
255 0, 0xFF, 1, out_tlv),
256 SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
257 0, 0xFF, 1, out_tlv),
258 SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
259 0, 0xFF, 1, out_tlv),
260};
261
262static const struct reg_default ak4613_reg[] = {
263 { 0x0, 0x0f }, { 0x1, 0x07 }, { 0x2, 0x3f }, { 0x3, 0x20 },
264 { 0x4, 0x20 }, { 0x5, 0x55 }, { 0x6, 0x05 }, { 0x7, 0x07 },
265 { 0x8, 0x0f }, { 0x9, 0x07 }, { 0xa, 0x3f }, { 0xb, 0x00 },
266 { 0xc, 0x00 }, { 0xd, 0x00 }, { 0xe, 0x00 }, { 0xf, 0x00 },
267 { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
268 { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
269};
270
271/*
272 * CTRL1 register
273 * see
274 * Table 11/12/13/14
275 */
276#define AUDIO_IFACE(_dif, _width, _fmt) \
277 { \
278 .dif = _dif, \
279 .width = _width, \
280 .fmt = SND_SOC_DAIFMT_##_fmt,\
281 }
282static const struct ak4613_interface ak4613_iface[] = {
283 /* It doesn't support asymmetric format */
284
285 AUDIO_IFACE(0x03, 24, LEFT_J),
286 AUDIO_IFACE(0x04, 24, I2S),
287};
288#define AK4613_CTRL1_TO_MODE(priv) ((priv)->ctrl1 >> 6) /* AK4613_CONFIG_MODE_x */
289
290static const struct regmap_config ak4613_regmap_cfg = {
291 .reg_bits = 8,
292 .val_bits = 8,
293 .max_register = 0x16,
294 .reg_defaults = ak4613_reg,
295 .num_reg_defaults = ARRAY_SIZE(ak4613_reg),
296 .cache_type = REGCACHE_RBTREE,
297};
298
299static const struct of_device_id ak4613_of_match[] = {
300 { .compatible = "asahi-kasei,ak4613", .data = &ak4613_regmap_cfg },
301 {},
302};
303MODULE_DEVICE_TABLE(of, ak4613_of_match);
304
305static const struct i2c_device_id ak4613_i2c_id[] = {
306 { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
307 { }
308};
309MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);
310
311static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {
312
313 /* Outputs */
314 SND_SOC_DAPM_OUTPUT("LOUT1"),
315 SND_SOC_DAPM_OUTPUT("LOUT2"),
316 SND_SOC_DAPM_OUTPUT("LOUT3"),
317 SND_SOC_DAPM_OUTPUT("LOUT4"),
318 SND_SOC_DAPM_OUTPUT("LOUT5"),
319 SND_SOC_DAPM_OUTPUT("LOUT6"),
320
321 SND_SOC_DAPM_OUTPUT("ROUT1"),
322 SND_SOC_DAPM_OUTPUT("ROUT2"),
323 SND_SOC_DAPM_OUTPUT("ROUT3"),
324 SND_SOC_DAPM_OUTPUT("ROUT4"),
325 SND_SOC_DAPM_OUTPUT("ROUT5"),
326 SND_SOC_DAPM_OUTPUT("ROUT6"),
327
328 /* Inputs */
329 SND_SOC_DAPM_INPUT("LIN1"),
330 SND_SOC_DAPM_INPUT("LIN2"),
331
332 SND_SOC_DAPM_INPUT("RIN1"),
333 SND_SOC_DAPM_INPUT("RIN2"),
334
335 /* DAC */
336 SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
337 SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
338 SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
339 SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
340 SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
341 SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),
342
343 /* ADC */
344 SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
345 SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
346};
347
348static const struct snd_soc_dapm_route ak4613_intercon[] = {
349 {"LOUT1", NULL, "DAC1"},
350 {"LOUT2", NULL, "DAC2"},
351 {"LOUT3", NULL, "DAC3"},
352 {"LOUT4", NULL, "DAC4"},
353 {"LOUT5", NULL, "DAC5"},
354 {"LOUT6", NULL, "DAC6"},
355
356 {"ROUT1", NULL, "DAC1"},
357 {"ROUT2", NULL, "DAC2"},
358 {"ROUT3", NULL, "DAC3"},
359 {"ROUT4", NULL, "DAC4"},
360 {"ROUT5", NULL, "DAC5"},
361 {"ROUT6", NULL, "DAC6"},
362
363 {"DAC1", NULL, "Playback"},
364 {"DAC2", NULL, "Playback"},
365 {"DAC3", NULL, "Playback"},
366 {"DAC4", NULL, "Playback"},
367 {"DAC5", NULL, "Playback"},
368 {"DAC6", NULL, "Playback"},
369
370 {"Capture", NULL, "ADC1"},
371 {"Capture", NULL, "ADC2"},
372
373 {"ADC1", NULL, "LIN1"},
374 {"ADC2", NULL, "LIN2"},
375
376 {"ADC1", NULL, "RIN1"},
377 {"ADC2", NULL, "RIN2"},
378};
379
380static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
381 struct snd_soc_dai *dai)
382{
383 struct snd_soc_component *component = dai->component;
384 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
385 struct device *dev = component->dev;
386
387 mutex_lock(&priv->lock);
388 priv->cnt--;
389 if (priv->cnt < 0) {
390 dev_err(dev, "unexpected counter error\n");
391 priv->cnt = 0;
392 }
393 if (!priv->cnt)
394 priv->ctrl1 = 0;
395 mutex_unlock(lock: &priv->lock);
396}
397
398static void ak4613_hw_constraints(struct ak4613_priv *priv,
399 struct snd_pcm_substream *substream)
400{
401 struct snd_pcm_runtime *runtime = substream->runtime;
402 static const unsigned int ak4613_rates[] = {
403 32000,
404 44100,
405 48000,
406 64000,
407 88200,
408 96000,
409 176400,
410 192000,
411 };
412#define AK4613_CHANNEL_2 0
413#define AK4613_CHANNEL_4 1
414#define AK4613_CHANNEL_8 2
415#define AK4613_CHANNEL_12 3
416#define AK4613_CHANNEL_NONE -1
417 static const unsigned int ak4613_channels[] = {
418 [AK4613_CHANNEL_2] = 2,
419 [AK4613_CHANNEL_4] = 4,
420 [AK4613_CHANNEL_8] = 8,
421 [AK4613_CHANNEL_12] = 12,
422 };
423#define MODE_MAX 4
424#define SDTx_MAX 4
425#define MASK(x) (1 << AK4613_CHANNEL_##x)
426 static const int mask_list[MODE_MAX][SDTx_MAX] = {
427 /* SDTO SDTIx1 SDTIx2 SDTIx3 */
428 [AK4613_CONFIG_MODE_STEREO] = { MASK(2), MASK(2), MASK(2), MASK(2)},
429 [AK4613_CONFIG_MODE_TDM512] = { MASK(4), MASK(12), MASK(12), MASK(12)},
430 [AK4613_CONFIG_MODE_TDM256] = { MASK(4), MASK(8), MASK(8)|MASK(12), MASK(8)|MASK(12)},
431 [AK4613_CONFIG_MODE_TDM128] = { MASK(4), MASK(4), MASK(4)|MASK(8), MASK(4)|MASK(8)|MASK(12)},
432 };
433 struct snd_pcm_hw_constraint_list *constraint;
434 unsigned int mask;
435 unsigned int mode;
436 unsigned int fs;
437 int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
438 int sdti_num;
439 int i;
440
441 constraint = &priv->constraint_rates;
442 constraint->list = ak4613_rates;
443 constraint->mask = 0;
444 constraint->count = 0;
445
446 /*
447 * Slave Mode
448 * Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
449 * Double: [64kHz, 96kHz] : 256fs
450 * Quad : [128kHz,192kHz]: 128fs
451 *
452 * Master mode
453 * Normal: [32kHz, 48kHz] : 256fs or 512fs
454 * Double: [64kHz, 96kHz] : 256fs
455 * Quad : [128kHz,192kHz]: 128fs
456 */
457 for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
458 /* minimum fs on each range */
459 fs = (ak4613_rates[i] <= 96000) ? 256 : 128;
460
461 if (priv->sysclk >= ak4613_rates[i] * fs)
462 constraint->count = i + 1;
463 }
464
465 snd_pcm_hw_constraint_list(runtime, cond: 0,
466 SNDRV_PCM_HW_PARAM_RATE, l: constraint);
467
468
469 sdti_num = AK4613_CONFIG_SDTI_get(priv);
470 if (WARN_ON(sdti_num >= SDTx_MAX))
471 return;
472
473 if (priv->cnt) {
474 /*
475 * If it was already working,
476 * the constraint is same as working mode.
477 */
478 mode = AK4613_CTRL1_TO_MODE(priv);
479 mask = 0; /* no default */
480 } else {
481 /*
482 * It is not yet working,
483 * the constraint is based on board configs.
484 * STEREO mask is default
485 */
486 mode = AK4613_CONFIG_GET(priv, MODE);
487 mask = mask_list[AK4613_CONFIG_MODE_STEREO][is_play * sdti_num];
488 }
489
490 if (WARN_ON(mode >= MODE_MAX))
491 return;
492
493 /* add each mode mask */
494 mask |= mask_list[mode][is_play * sdti_num];
495
496 constraint = &priv->constraint_channels;
497 constraint->list = ak4613_channels;
498 constraint->mask = mask;
499 constraint->count = sizeof(ak4613_channels);
500 snd_pcm_hw_constraint_list(runtime, cond: 0,
501 SNDRV_PCM_HW_PARAM_CHANNELS, l: constraint);
502}
503
504static int ak4613_dai_startup(struct snd_pcm_substream *substream,
505 struct snd_soc_dai *dai)
506{
507 struct snd_soc_component *component = dai->component;
508 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
509
510 mutex_lock(&priv->lock);
511 ak4613_hw_constraints(priv, substream);
512 priv->cnt++;
513 mutex_unlock(lock: &priv->lock);
514
515 return 0;
516}
517
518static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
519 int clk_id, unsigned int freq, int dir)
520{
521 struct snd_soc_component *component = codec_dai->component;
522 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
523
524 priv->sysclk = freq;
525
526 return 0;
527}
528
529static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int format)
530{
531 struct snd_soc_component *component = dai->component;
532 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
533 unsigned int fmt;
534
535 fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
536 switch (fmt) {
537 case SND_SOC_DAIFMT_LEFT_J:
538 case SND_SOC_DAIFMT_I2S:
539 priv->fmt = fmt;
540 break;
541 default:
542 return -EINVAL;
543 }
544
545 fmt = format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
546 switch (fmt) {
547 case SND_SOC_DAIFMT_CBC_CFC:
548 break;
549 default:
550 /*
551 * SUPPORTME
552 *
553 * "clock provider" is not yet supperted
554 */
555 return -EINVAL;
556 }
557
558 return 0;
559}
560
561static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
562 struct snd_pcm_hw_params *params,
563 struct snd_soc_dai *dai)
564{
565 struct snd_soc_component *component = dai->component;
566 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
567 struct device *dev = component->dev;
568 unsigned int width = params_width(p: params);
569 unsigned int fmt = priv->fmt;
570 unsigned int rate;
571 int i, ret;
572 u8 ctrl2;
573
574 rate = params_rate(p: params);
575 switch (rate) {
576 case 32000:
577 case 44100:
578 case 48000:
579 ctrl2 = DFS_NORMAL_SPEED;
580 break;
581 case 64000:
582 case 88200:
583 case 96000:
584 ctrl2 = DFS_DOUBLE_SPEED;
585 break;
586 case 176400:
587 case 192000:
588 ctrl2 = DFS_QUAD_SPEED;
589 break;
590 default:
591 return -EINVAL;
592 }
593 priv->rate = rate;
594
595 /*
596 * FIXME
597 *
598 * It doesn't have full TDM suppert yet
599 */
600 ret = -EINVAL;
601
602 mutex_lock(&priv->lock);
603 if (priv->cnt > 1) {
604 /*
605 * If it was already working, use current priv->ctrl1
606 */
607 ret = 0;
608 } else {
609 /*
610 * It is not yet working,
611 */
612 unsigned int channel = params_channels(p: params);
613 u8 tdm;
614
615 /* STEREO or TDM */
616 if (channel == 2)
617 tdm = AK4613_CONFIG_MODE_STEREO;
618 else
619 tdm = AK4613_CONFIG_GET(priv, MODE);
620
621 for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
622 const struct ak4613_interface *iface = ak4613_iface + i;
623
624 if ((iface->fmt == fmt) && (iface->width == width)) {
625 /*
626 * Ctrl1
627 * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
628 * |TDM1|TDM0|DIF2|DIF1|DIF0|ATS1|ATS0|SMUTE|
629 * < tdm > < iface->dif >
630 */
631 priv->ctrl1 = (tdm << 6) | (iface->dif << 3);
632 ret = 0;
633 break;
634 }
635 }
636 }
637 mutex_unlock(lock: &priv->lock);
638
639 if (ret < 0)
640 goto hw_params_end;
641
642 snd_soc_component_update_bits(component, CTRL1, FMT_MASK, val: priv->ctrl1);
643 snd_soc_component_update_bits(component, CTRL2, DFS_MASK, val: ctrl2);
644
645 snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, val: priv->ic);
646 snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, val: priv->oc);
647
648hw_params_end:
649 if (ret < 0)
650 dev_warn(dev, "unsupported data width/format combination\n");
651
652 return ret;
653}
654
655static int ak4613_set_bias_level(struct snd_soc_component *component,
656 enum snd_soc_bias_level level)
657{
658 u8 mgmt1 = 0;
659
660 switch (level) {
661 case SND_SOC_BIAS_ON:
662 mgmt1 |= RSTN;
663 fallthrough;
664 case SND_SOC_BIAS_PREPARE:
665 mgmt1 |= PMADC | PMDAC;
666 fallthrough;
667 case SND_SOC_BIAS_STANDBY:
668 mgmt1 |= PMVR;
669 fallthrough;
670 case SND_SOC_BIAS_OFF:
671 default:
672 break;
673 }
674
675 snd_soc_component_write(component, PW_MGMT1, val: mgmt1);
676
677 return 0;
678}
679
680static void ak4613_dummy_write(struct work_struct *work)
681{
682 struct ak4613_priv *priv = container_of(work,
683 struct ak4613_priv,
684 dummy_write_work);
685 struct snd_soc_component *component = priv->component;
686 unsigned int mgmt1;
687 unsigned int mgmt3;
688
689 /*
690 * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
691 *
692 * Note
693 *
694 * To avoid extra delay, we want to avoid preemption here,
695 * but we can't. Because it uses I2C access which is using IRQ
696 * and sleep. Thus, delay might be more than 5 LR clocks
697 * see also
698 * ak4613_dai_trigger()
699 */
700 udelay(5000000 / priv->rate);
701
702 mgmt1 = snd_soc_component_read(component, PW_MGMT1);
703 mgmt3 = snd_soc_component_read(component, PW_MGMT3);
704
705 snd_soc_component_write(component, PW_MGMT1, val: mgmt1);
706 snd_soc_component_write(component, PW_MGMT3, val: mgmt3);
707}
708
709static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
710 struct snd_soc_dai *dai)
711{
712 struct snd_soc_component *component = dai->component;
713 struct ak4613_priv *priv = snd_soc_component_get_drvdata(c: component);
714
715 /*
716 * FIXME
717 *
718 * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
719 * from Power Down Release. Otherwise, Playback volume will be 0dB.
720 * To avoid complex multiple delay/dummy_write method from
721 * ak4613_set_bias_level() / SND_SOC_DAPM_DAC_E("DACx", ...),
722 * call it once here.
723 *
724 * But, unfortunately, we can't "write" here because here is atomic
725 * context (It uses I2C access for writing).
726 * Thus, use schedule_work() to switching to normal context
727 * immediately.
728 *
729 * Note
730 *
731 * Calling ak4613_dummy_write() function might be delayed.
732 * In such case, ak4613 volume might be temporarily 0dB when
733 * beggining of playback.
734 * see also
735 * ak4613_dummy_write()
736 */
737
738 if ((cmd != SNDRV_PCM_TRIGGER_START) &&
739 (cmd != SNDRV_PCM_TRIGGER_RESUME))
740 return 0;
741
742 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
743 return 0;
744
745 priv->component = component;
746 schedule_work(work: &priv->dummy_write_work);
747
748 return 0;
749}
750
751/*
752 * Select below from Sound Card, not Auto
753 * SND_SOC_DAIFMT_CBC_CFC
754 * SND_SOC_DAIFMT_CBP_CFP
755 */
756static u64 ak4613_dai_formats =
757 SND_SOC_POSSIBLE_DAIFMT_I2S |
758 SND_SOC_POSSIBLE_DAIFMT_LEFT_J;
759
760static const struct snd_soc_dai_ops ak4613_dai_ops = {
761 .startup = ak4613_dai_startup,
762 .shutdown = ak4613_dai_shutdown,
763 .set_sysclk = ak4613_dai_set_sysclk,
764 .set_fmt = ak4613_dai_set_fmt,
765 .trigger = ak4613_dai_trigger,
766 .hw_params = ak4613_dai_hw_params,
767 .auto_selectable_formats = &ak4613_dai_formats,
768 .num_auto_selectable_formats = 1,
769};
770
771#define AK4613_PCM_RATE (SNDRV_PCM_RATE_32000 |\
772 SNDRV_PCM_RATE_44100 |\
773 SNDRV_PCM_RATE_48000 |\
774 SNDRV_PCM_RATE_64000 |\
775 SNDRV_PCM_RATE_88200 |\
776 SNDRV_PCM_RATE_96000 |\
777 SNDRV_PCM_RATE_176400 |\
778 SNDRV_PCM_RATE_192000)
779#define AK4613_PCM_FMTBIT (SNDRV_PCM_FMTBIT_S24_LE)
780
781static struct snd_soc_dai_driver ak4613_dai = {
782 .name = "ak4613-hifi",
783 .playback = {
784 .stream_name = "Playback",
785 .channels_min = 2,
786 .channels_max = 12,
787 .rates = AK4613_PCM_RATE,
788 .formats = AK4613_PCM_FMTBIT,
789 },
790 .capture = {
791 .stream_name = "Capture",
792 .channels_min = 2,
793 .channels_max = 4,
794 .rates = AK4613_PCM_RATE,
795 .formats = AK4613_PCM_FMTBIT,
796 },
797 .ops = &ak4613_dai_ops,
798 .symmetric_rate = 1,
799};
800
801static int ak4613_suspend(struct snd_soc_component *component)
802{
803 struct regmap *regmap = dev_get_regmap(dev: component->dev, NULL);
804
805 regcache_cache_only(map: regmap, enable: true);
806 regcache_mark_dirty(map: regmap);
807 return 0;
808}
809
810static int ak4613_resume(struct snd_soc_component *component)
811{
812 struct regmap *regmap = dev_get_regmap(dev: component->dev, NULL);
813
814 regcache_cache_only(map: regmap, enable: false);
815 return regcache_sync(map: regmap);
816}
817
818static const struct snd_soc_component_driver soc_component_dev_ak4613 = {
819 .suspend = ak4613_suspend,
820 .resume = ak4613_resume,
821 .set_bias_level = ak4613_set_bias_level,
822 .controls = ak4613_snd_controls,
823 .num_controls = ARRAY_SIZE(ak4613_snd_controls),
824 .dapm_widgets = ak4613_dapm_widgets,
825 .num_dapm_widgets = ARRAY_SIZE(ak4613_dapm_widgets),
826 .dapm_routes = ak4613_intercon,
827 .num_dapm_routes = ARRAY_SIZE(ak4613_intercon),
828 .idle_bias_on = 1,
829 .endianness = 1,
830};
831
832static void ak4613_parse_of(struct ak4613_priv *priv,
833 struct device *dev)
834{
835 struct device_node *np = dev->of_node;
836 char prop[32];
837 int sdti_num;
838 int i;
839
840 /* Input 1 - 2 */
841 for (i = 0; i < 2; i++) {
842 snprintf(buf: prop, size: sizeof(prop), fmt: "asahi-kasei,in%d-single-end", i + 1);
843 if (!of_get_property(node: np, name: prop, NULL))
844 priv->ic |= 1 << i;
845 }
846
847 /* Output 1 - 6 */
848 for (i = 0; i < 6; i++) {
849 snprintf(buf: prop, size: sizeof(prop), fmt: "asahi-kasei,out%d-single-end", i + 1);
850 if (!of_get_property(node: np, name: prop, NULL))
851 priv->oc |= 1 << i;
852 }
853
854 /*
855 * enable TDM256 test
856 *
857 * !!! FIXME !!!
858 *
859 * It should be configured by DT or other way
860 * if it was full supported.
861 * But it is using ifdef style for now for test
862 * purpose.
863 */
864#if defined(AK4613_ENABLE_TDM_TEST)
865 AK4613_CONFIG_SET(priv, MODE_TDM256);
866#endif
867
868 /*
869 * connected STDI
870 * TDM support is assuming it is probed via Audio-Graph-Card style here.
871 * Default is SDTIx1 if it was probed via Simple-Audio-Card for now.
872 */
873 sdti_num = of_graph_get_endpoint_count(np);
874 if ((sdti_num >= SDTx_MAX) || (sdti_num < 1))
875 sdti_num = 1;
876
877 AK4613_CONFIG_SDTI_set(priv, sdti_num);
878}
879
880static int ak4613_i2c_probe(struct i2c_client *i2c)
881{
882 struct device *dev = &i2c->dev;
883 const struct regmap_config *regmap_cfg;
884 struct regmap *regmap;
885 struct ak4613_priv *priv;
886
887 regmap_cfg = i2c_get_match_data(client: i2c);
888 if (!regmap_cfg)
889 return -EINVAL;
890
891 priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL);
892 if (!priv)
893 return -ENOMEM;
894
895 ak4613_parse_of(priv, dev);
896
897 priv->ctrl1 = 0;
898 priv->cnt = 0;
899 priv->sysclk = 0;
900 INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write);
901
902 mutex_init(&priv->lock);
903
904 i2c_set_clientdata(client: i2c, data: priv);
905
906 regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
907 if (IS_ERR(ptr: regmap))
908 return PTR_ERR(ptr: regmap);
909
910 return devm_snd_soc_register_component(dev, component_driver: &soc_component_dev_ak4613,
911 dai_drv: &ak4613_dai, num_dai: 1);
912}
913
914static struct i2c_driver ak4613_i2c_driver = {
915 .driver = {
916 .name = "ak4613-codec",
917 .of_match_table = ak4613_of_match,
918 },
919 .probe = ak4613_i2c_probe,
920 .id_table = ak4613_i2c_id,
921};
922
923module_i2c_driver(ak4613_i2c_driver);
924
925MODULE_DESCRIPTION("Soc AK4613 driver");
926MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
927MODULE_LICENSE("GPL v2");
928

source code of linux/sound/soc/codecs/ak4613.c