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13#include <linux/clk.h>
14#include <linux/delay.h>
15#include <linux/i2c.h>
16#include <linux/slab.h>
17#include <linux/of_device.h>
18#include <linux/module.h>
19#include <linux/regmap.h>
20#include <sound/soc.h>
21#include <sound/pcm_params.h>
22#include <sound/tlv.h>
23
24#define PW_MGMT1 0x00
25#define PW_MGMT2 0x01
26#define PW_MGMT3 0x02
27#define CTRL1 0x03
28#define CTRL2 0x04
29#define DEMP1 0x05
30#define DEMP2 0x06
31#define OFD 0x07
32#define ZRD 0x08
33#define ICTRL 0x09
34#define OCTRL 0x0a
35#define LOUT1 0x0b
36#define ROUT1 0x0c
37#define LOUT2 0x0d
38#define ROUT2 0x0e
39#define LOUT3 0x0f
40#define ROUT3 0x10
41#define LOUT4 0x11
42#define ROUT4 0x12
43#define LOUT5 0x13
44#define ROUT5 0x14
45#define LOUT6 0x15
46#define ROUT6 0x16
47
48
49#define RSTN BIT(0)
50#define PMDAC BIT(1)
51#define PMADC BIT(2)
52#define PMVR BIT(3)
53
54
55#define PMAD_ALL 0x7
56
57
58#define PMDA_ALL 0x3f
59
60
61#define DIF0 BIT(3)
62#define DIF1 BIT(4)
63#define DIF2 BIT(5)
64#define TDM0 BIT(6)
65#define TDM1 BIT(7)
66#define NO_FMT (0xff)
67#define FMT_MASK (0xf8)
68
69
70#define DFS_MASK (3 << 2)
71#define DFS_NORMAL_SPEED (0 << 2)
72#define DFS_DOUBLE_SPEED (1 << 2)
73#define DFS_QUAD_SPEED (2 << 2)
74
75
76#define ICTRL_MASK (0x3)
77
78
79#define OCTRL_MASK (0x3F)
80
81struct ak4613_formats {
82 unsigned int width;
83 unsigned int fmt;
84};
85
86struct ak4613_interface {
87 struct ak4613_formats capture;
88 struct ak4613_formats playback;
89};
90
91struct ak4613_priv {
92 struct mutex lock;
93 const struct ak4613_interface *iface;
94 struct snd_pcm_hw_constraint_list constraint;
95 struct work_struct dummy_write_work;
96 struct snd_soc_component *component;
97 unsigned int rate;
98 unsigned int sysclk;
99
100 unsigned int fmt;
101 u8 oc;
102 u8 ic;
103 int cnt;
104};
105
106
107
108
109
110
111
112
113
114static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);
115
116static const struct snd_kcontrol_new ak4613_snd_controls[] = {
117 SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
118 0, 0xFF, 1, out_tlv),
119 SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
120 0, 0xFF, 1, out_tlv),
121 SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
122 0, 0xFF, 1, out_tlv),
123 SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
124 0, 0xFF, 1, out_tlv),
125 SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
126 0, 0xFF, 1, out_tlv),
127 SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
128 0, 0xFF, 1, out_tlv),
129};
130
131static const struct reg_default ak4613_reg[] = {
132 { 0x0, 0x0f }, { 0x1, 0x07 }, { 0x2, 0x3f }, { 0x3, 0x20 },
133 { 0x4, 0x20 }, { 0x5, 0x55 }, { 0x6, 0x05 }, { 0x7, 0x07 },
134 { 0x8, 0x0f }, { 0x9, 0x07 }, { 0xa, 0x3f }, { 0xb, 0x00 },
135 { 0xc, 0x00 }, { 0xd, 0x00 }, { 0xe, 0x00 }, { 0xf, 0x00 },
136 { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
137 { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
138};
139
140#define AUDIO_IFACE_TO_VAL(fmts) ((fmts - ak4613_iface) << 3)
141#define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
142static const struct ak4613_interface ak4613_iface[] = {
143
144
145 [3] = { AUDIO_IFACE(24, LEFT_J), AUDIO_IFACE(24, LEFT_J) },
146 [4] = { AUDIO_IFACE(24, I2S), AUDIO_IFACE(24, I2S) },
147};
148
149static const struct regmap_config ak4613_regmap_cfg = {
150 .reg_bits = 8,
151 .val_bits = 8,
152 .max_register = 0x16,
153 .reg_defaults = ak4613_reg,
154 .num_reg_defaults = ARRAY_SIZE(ak4613_reg),
155 .cache_type = REGCACHE_RBTREE,
156};
157
158static const struct of_device_id ak4613_of_match[] = {
159 { .compatible = "asahi-kasei,ak4613", .data = &ak4613_regmap_cfg },
160 {},
161};
162MODULE_DEVICE_TABLE(of, ak4613_of_match);
163
164static const struct i2c_device_id ak4613_i2c_id[] = {
165 { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
166 { }
167};
168MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);
169
170static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {
171
172
173 SND_SOC_DAPM_OUTPUT("LOUT1"),
174 SND_SOC_DAPM_OUTPUT("LOUT2"),
175 SND_SOC_DAPM_OUTPUT("LOUT3"),
176 SND_SOC_DAPM_OUTPUT("LOUT4"),
177 SND_SOC_DAPM_OUTPUT("LOUT5"),
178 SND_SOC_DAPM_OUTPUT("LOUT6"),
179
180 SND_SOC_DAPM_OUTPUT("ROUT1"),
181 SND_SOC_DAPM_OUTPUT("ROUT2"),
182 SND_SOC_DAPM_OUTPUT("ROUT3"),
183 SND_SOC_DAPM_OUTPUT("ROUT4"),
184 SND_SOC_DAPM_OUTPUT("ROUT5"),
185 SND_SOC_DAPM_OUTPUT("ROUT6"),
186
187
188 SND_SOC_DAPM_INPUT("LIN1"),
189 SND_SOC_DAPM_INPUT("LIN2"),
190
191 SND_SOC_DAPM_INPUT("RIN1"),
192 SND_SOC_DAPM_INPUT("RIN2"),
193
194
195 SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
196 SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
197 SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
198 SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
199 SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
200 SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),
201
202
203 SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
204 SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
205};
206
207static const struct snd_soc_dapm_route ak4613_intercon[] = {
208 {"LOUT1", NULL, "DAC1"},
209 {"LOUT2", NULL, "DAC2"},
210 {"LOUT3", NULL, "DAC3"},
211 {"LOUT4", NULL, "DAC4"},
212 {"LOUT5", NULL, "DAC5"},
213 {"LOUT6", NULL, "DAC6"},
214
215 {"ROUT1", NULL, "DAC1"},
216 {"ROUT2", NULL, "DAC2"},
217 {"ROUT3", NULL, "DAC3"},
218 {"ROUT4", NULL, "DAC4"},
219 {"ROUT5", NULL, "DAC5"},
220 {"ROUT6", NULL, "DAC6"},
221
222 {"DAC1", NULL, "Playback"},
223 {"DAC2", NULL, "Playback"},
224 {"DAC3", NULL, "Playback"},
225 {"DAC4", NULL, "Playback"},
226 {"DAC5", NULL, "Playback"},
227 {"DAC6", NULL, "Playback"},
228
229 {"Capture", NULL, "ADC1"},
230 {"Capture", NULL, "ADC2"},
231
232 {"ADC1", NULL, "LIN1"},
233 {"ADC2", NULL, "LIN2"},
234
235 {"ADC1", NULL, "RIN1"},
236 {"ADC2", NULL, "RIN2"},
237};
238
239static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
240 struct snd_soc_dai *dai)
241{
242 struct snd_soc_component *component = dai->component;
243 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
244 struct device *dev = component->dev;
245
246 mutex_lock(&priv->lock);
247 priv->cnt--;
248 if (priv->cnt < 0) {
249 dev_err(dev, "unexpected counter error\n");
250 priv->cnt = 0;
251 }
252 if (!priv->cnt)
253 priv->iface = NULL;
254 mutex_unlock(&priv->lock);
255}
256
257static void ak4613_hw_constraints(struct ak4613_priv *priv,
258 struct snd_pcm_runtime *runtime)
259{
260 static const unsigned int ak4613_rates[] = {
261 32000,
262 44100,
263 48000,
264 64000,
265 88200,
266 96000,
267 176400,
268 192000,
269 };
270 struct snd_pcm_hw_constraint_list *constraint = &priv->constraint;
271 unsigned int fs;
272 int i;
273
274 constraint->list = ak4613_rates;
275 constraint->mask = 0;
276 constraint->count = 0;
277
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287
288
289 for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
290
291 fs = (ak4613_rates[i] <= 96000) ? 256 : 128;
292
293 if (priv->sysclk >= ak4613_rates[i] * fs)
294 constraint->count = i + 1;
295 }
296
297 snd_pcm_hw_constraint_list(runtime, 0,
298 SNDRV_PCM_HW_PARAM_RATE, constraint);
299}
300
301static int ak4613_dai_startup(struct snd_pcm_substream *substream,
302 struct snd_soc_dai *dai)
303{
304 struct snd_soc_component *component = dai->component;
305 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
306
307 priv->cnt++;
308
309 ak4613_hw_constraints(priv, substream->runtime);
310
311 return 0;
312}
313
314static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
315 int clk_id, unsigned int freq, int dir)
316{
317 struct snd_soc_component *component = codec_dai->component;
318 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
319
320 priv->sysclk = freq;
321
322 return 0;
323}
324
325static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
326{
327 struct snd_soc_component *component = dai->component;
328 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
329
330 fmt &= SND_SOC_DAIFMT_FORMAT_MASK;
331
332 switch (fmt) {
333 case SND_SOC_DAIFMT_LEFT_J:
334 case SND_SOC_DAIFMT_I2S:
335 priv->fmt = fmt;
336 break;
337 default:
338 return -EINVAL;
339 }
340
341 return 0;
342}
343
344static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
345 int is_play,
346 unsigned int fmt, unsigned int width)
347{
348 const struct ak4613_formats *fmts;
349
350 fmts = (is_play) ? &iface->playback : &iface->capture;
351
352 if (fmts->fmt != fmt)
353 return false;
354
355 if (fmts->width != width)
356 return false;
357
358 return true;
359}
360
361static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
362 struct snd_pcm_hw_params *params,
363 struct snd_soc_dai *dai)
364{
365 struct snd_soc_component *component = dai->component;
366 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
367 const struct ak4613_interface *iface;
368 struct device *dev = component->dev;
369 unsigned int width = params_width(params);
370 unsigned int fmt = priv->fmt;
371 unsigned int rate;
372 int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
373 int i, ret;
374 u8 fmt_ctrl, ctrl2;
375
376 rate = params_rate(params);
377 switch (rate) {
378 case 32000:
379 case 44100:
380 case 48000:
381 ctrl2 = DFS_NORMAL_SPEED;
382 break;
383 case 64000:
384 case 88200:
385 case 96000:
386 ctrl2 = DFS_DOUBLE_SPEED;
387 break;
388 case 176400:
389 case 192000:
390 ctrl2 = DFS_QUAD_SPEED;
391 break;
392 default:
393 return -EINVAL;
394 }
395 priv->rate = rate;
396
397
398
399
400
401
402 fmt_ctrl = NO_FMT;
403 ret = -EINVAL;
404 iface = NULL;
405
406 mutex_lock(&priv->lock);
407 if (priv->iface) {
408 if (ak4613_dai_fmt_matching(priv->iface, is_play, fmt, width))
409 iface = priv->iface;
410 } else {
411 for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
412 if (!ak4613_dai_fmt_matching(ak4613_iface + i,
413 is_play,
414 fmt, width))
415 continue;
416 iface = ak4613_iface + i;
417 break;
418 }
419 }
420
421 if ((priv->iface == NULL) ||
422 (priv->iface == iface)) {
423 priv->iface = iface;
424 ret = 0;
425 }
426 mutex_unlock(&priv->lock);
427
428 if (ret < 0)
429 goto hw_params_end;
430
431 fmt_ctrl = AUDIO_IFACE_TO_VAL(iface);
432
433 snd_soc_component_update_bits(component, CTRL1, FMT_MASK, fmt_ctrl);
434 snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2);
435
436 snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic);
437 snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc);
438
439hw_params_end:
440 if (ret < 0)
441 dev_warn(dev, "unsupported data width/format combination\n");
442
443 return ret;
444}
445
446static int ak4613_set_bias_level(struct snd_soc_component *component,
447 enum snd_soc_bias_level level)
448{
449 u8 mgmt1 = 0;
450
451 switch (level) {
452 case SND_SOC_BIAS_ON:
453 mgmt1 |= RSTN;
454 fallthrough;
455 case SND_SOC_BIAS_PREPARE:
456 mgmt1 |= PMADC | PMDAC;
457 fallthrough;
458 case SND_SOC_BIAS_STANDBY:
459 mgmt1 |= PMVR;
460 fallthrough;
461 case SND_SOC_BIAS_OFF:
462 default:
463 break;
464 }
465
466 snd_soc_component_write(component, PW_MGMT1, mgmt1);
467
468 return 0;
469}
470
471static void ak4613_dummy_write(struct work_struct *work)
472{
473 struct ak4613_priv *priv = container_of(work,
474 struct ak4613_priv,
475 dummy_write_work);
476 struct snd_soc_component *component = priv->component;
477 unsigned int mgmt1;
478 unsigned int mgmt3;
479
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489
490
491 udelay(5000000 / priv->rate);
492
493 mgmt1 = snd_soc_component_read(component, PW_MGMT1);
494 mgmt3 = snd_soc_component_read(component, PW_MGMT3);
495
496 snd_soc_component_write(component, PW_MGMT1, mgmt1);
497 snd_soc_component_write(component, PW_MGMT3, mgmt3);
498}
499
500static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
501 struct snd_soc_dai *dai)
502{
503 struct snd_soc_component *component = dai->component;
504 struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
505
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527
528
529 if ((cmd != SNDRV_PCM_TRIGGER_START) &&
530 (cmd != SNDRV_PCM_TRIGGER_RESUME))
531 return 0;
532
533 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
534 return 0;
535
536 priv->component = component;
537 schedule_work(&priv->dummy_write_work);
538
539 return 0;
540}
541
542
543
544
545
546
547static u64 ak4613_dai_formats =
548 SND_SOC_POSSIBLE_DAIFMT_I2S |
549 SND_SOC_POSSIBLE_DAIFMT_LEFT_J;
550
551static const struct snd_soc_dai_ops ak4613_dai_ops = {
552 .startup = ak4613_dai_startup,
553 .shutdown = ak4613_dai_shutdown,
554 .set_sysclk = ak4613_dai_set_sysclk,
555 .set_fmt = ak4613_dai_set_fmt,
556 .trigger = ak4613_dai_trigger,
557 .hw_params = ak4613_dai_hw_params,
558 .auto_selectable_formats = &ak4613_dai_formats,
559 .num_auto_selectable_formats = 1,
560};
561
562#define AK4613_PCM_RATE (SNDRV_PCM_RATE_32000 |\
563 SNDRV_PCM_RATE_44100 |\
564 SNDRV_PCM_RATE_48000 |\
565 SNDRV_PCM_RATE_64000 |\
566 SNDRV_PCM_RATE_88200 |\
567 SNDRV_PCM_RATE_96000 |\
568 SNDRV_PCM_RATE_176400 |\
569 SNDRV_PCM_RATE_192000)
570#define AK4613_PCM_FMTBIT (SNDRV_PCM_FMTBIT_S24_LE)
571
572static struct snd_soc_dai_driver ak4613_dai = {
573 .name = "ak4613-hifi",
574 .playback = {
575 .stream_name = "Playback",
576 .channels_min = 2,
577 .channels_max = 2,
578 .rates = AK4613_PCM_RATE,
579 .formats = AK4613_PCM_FMTBIT,
580 },
581 .capture = {
582 .stream_name = "Capture",
583 .channels_min = 2,
584 .channels_max = 2,
585 .rates = AK4613_PCM_RATE,
586 .formats = AK4613_PCM_FMTBIT,
587 },
588 .ops = &ak4613_dai_ops,
589 .symmetric_rate = 1,
590};
591
592static int ak4613_suspend(struct snd_soc_component *component)
593{
594 struct regmap *regmap = dev_get_regmap(component->dev, NULL);
595
596 regcache_cache_only(regmap, true);
597 regcache_mark_dirty(regmap);
598 return 0;
599}
600
601static int ak4613_resume(struct snd_soc_component *component)
602{
603 struct regmap *regmap = dev_get_regmap(component->dev, NULL);
604
605 regcache_cache_only(regmap, false);
606 return regcache_sync(regmap);
607}
608
609static const struct snd_soc_component_driver soc_component_dev_ak4613 = {
610 .suspend = ak4613_suspend,
611 .resume = ak4613_resume,
612 .set_bias_level = ak4613_set_bias_level,
613 .controls = ak4613_snd_controls,
614 .num_controls = ARRAY_SIZE(ak4613_snd_controls),
615 .dapm_widgets = ak4613_dapm_widgets,
616 .num_dapm_widgets = ARRAY_SIZE(ak4613_dapm_widgets),
617 .dapm_routes = ak4613_intercon,
618 .num_dapm_routes = ARRAY_SIZE(ak4613_intercon),
619 .idle_bias_on = 1,
620 .endianness = 1,
621 .non_legacy_dai_naming = 1,
622};
623
624static void ak4613_parse_of(struct ak4613_priv *priv,
625 struct device *dev)
626{
627 struct device_node *np = dev->of_node;
628 char prop[32];
629 int i;
630
631
632 for (i = 0; i < 2; i++) {
633 snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1);
634 if (!of_get_property(np, prop, NULL))
635 priv->ic |= 1 << i;
636 }
637
638
639 for (i = 0; i < 6; i++) {
640 snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1);
641 if (!of_get_property(np, prop, NULL))
642 priv->oc |= 1 << i;
643 }
644}
645
646static int ak4613_i2c_probe(struct i2c_client *i2c,
647 const struct i2c_device_id *id)
648{
649 struct device *dev = &i2c->dev;
650 struct device_node *np = dev->of_node;
651 const struct regmap_config *regmap_cfg;
652 struct regmap *regmap;
653 struct ak4613_priv *priv;
654
655 regmap_cfg = NULL;
656 if (np) {
657 const struct of_device_id *of_id;
658
659 of_id = of_match_device(ak4613_of_match, dev);
660 if (of_id)
661 regmap_cfg = of_id->data;
662 } else {
663 regmap_cfg = (const struct regmap_config *)id->driver_data;
664 }
665
666 if (!regmap_cfg)
667 return -EINVAL;
668
669 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
670 if (!priv)
671 return -ENOMEM;
672
673 ak4613_parse_of(priv, dev);
674
675 priv->iface = NULL;
676 priv->cnt = 0;
677 priv->sysclk = 0;
678 INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write);
679
680 mutex_init(&priv->lock);
681
682 i2c_set_clientdata(i2c, priv);
683
684 regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
685 if (IS_ERR(regmap))
686 return PTR_ERR(regmap);
687
688 return devm_snd_soc_register_component(dev, &soc_component_dev_ak4613,
689 &ak4613_dai, 1);
690}
691
692static int ak4613_i2c_remove(struct i2c_client *client)
693{
694 return 0;
695}
696
697static struct i2c_driver ak4613_i2c_driver = {
698 .driver = {
699 .name = "ak4613-codec",
700 .of_match_table = ak4613_of_match,
701 },
702 .probe = ak4613_i2c_probe,
703 .remove = ak4613_i2c_remove,
704 .id_table = ak4613_i2c_id,
705};
706
707module_i2c_driver(ak4613_i2c_driver);
708
709MODULE_DESCRIPTION("Soc AK4613 driver");
710MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
711MODULE_LICENSE("GPL v2");
712
