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14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/init.h>
17#include <linux/delay.h>
18#include <linux/pm.h>
19#include <linux/i2c.h>
20#include <linux/spi/spi.h>
21#include <linux/regmap.h>
22#include <linux/regulator/consumer.h>
23#include <linux/slab.h>
24#include <linux/of_device.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include <sound/soc.h>
29#include <sound/initval.h>
30#include <sound/tlv.h>
31
32#include "wm8741.h"
33
34#define WM8741_NUM_SUPPLIES 2
35static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
36 "AVDD",
37 "DVDD",
38};
39
40#define WM8741_NUM_RATES 6
41
42
43struct wm8741_priv {
44 struct regmap *regmap;
45 struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
46 unsigned int sysclk;
47 const struct snd_pcm_hw_constraint_list *sysclk_constraints;
48};
49
50static const struct reg_default wm8741_reg_defaults[] = {
51 { 0, 0x0000 },
52 { 1, 0x0000 },
53 { 2, 0x0000 },
54 { 3, 0x0000 },
55 { 4, 0x0000 },
56 { 5, 0x000A },
57 { 6, 0x0000 },
58 { 7, 0x0000 },
59 { 8, 0x0002 },
60 { 32, 0x0002 },
61};
62
63static bool wm8741_readable(struct device *dev, unsigned int reg)
64{
65 switch (reg) {
66 case WM8741_DACLLSB_ATTENUATION:
67 case WM8741_DACLMSB_ATTENUATION:
68 case WM8741_DACRLSB_ATTENUATION:
69 case WM8741_DACRMSB_ATTENUATION:
70 case WM8741_VOLUME_CONTROL:
71 case WM8741_FORMAT_CONTROL:
72 case WM8741_FILTER_CONTROL:
73 case WM8741_MODE_CONTROL_1:
74 case WM8741_MODE_CONTROL_2:
75 case WM8741_ADDITIONAL_CONTROL_1:
76 return true;
77 default:
78 return false;
79 }
80}
81
82static int wm8741_reset(struct snd_soc_codec *codec)
83{
84 return snd_soc_write(codec, WM8741_RESET, 0);
85}
86
87static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
88static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
89
90static const struct snd_kcontrol_new wm8741_snd_controls[] = {
91SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
92 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
93SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
94 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
95};
96
97static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
98SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
99SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
100SND_SOC_DAPM_OUTPUT("VOUTLP"),
101SND_SOC_DAPM_OUTPUT("VOUTLN"),
102SND_SOC_DAPM_OUTPUT("VOUTRP"),
103SND_SOC_DAPM_OUTPUT("VOUTRN"),
104};
105
106static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
107 { "VOUTLP", NULL, "DACL" },
108 { "VOUTLN", NULL, "DACL" },
109 { "VOUTRP", NULL, "DACR" },
110 { "VOUTRN", NULL, "DACR" },
111};
112
113static struct {
114 int value;
115 int ratio;
116} lrclk_ratios[WM8741_NUM_RATES] = {
117 { 1, 128 },
118 { 2, 192 },
119 { 3, 256 },
120 { 4, 384 },
121 { 5, 512 },
122 { 6, 768 },
123};
124
125static const unsigned int rates_11289[] = {
126 44100, 88235,
127};
128
129static const struct snd_pcm_hw_constraint_list constraints_11289 = {
130 .count = ARRAY_SIZE(rates_11289),
131 .list = rates_11289,
132};
133
134static const unsigned int rates_12288[] = {
135 32000, 48000, 96000,
136};
137
138static const struct snd_pcm_hw_constraint_list constraints_12288 = {
139 .count = ARRAY_SIZE(rates_12288),
140 .list = rates_12288,
141};
142
143static const unsigned int rates_16384[] = {
144 32000,
145};
146
147static const struct snd_pcm_hw_constraint_list constraints_16384 = {
148 .count = ARRAY_SIZE(rates_16384),
149 .list = rates_16384,
150};
151
152static const unsigned int rates_16934[] = {
153 44100, 88235,
154};
155
156static const struct snd_pcm_hw_constraint_list constraints_16934 = {
157 .count = ARRAY_SIZE(rates_16934),
158 .list = rates_16934,
159};
160
161static const unsigned int rates_18432[] = {
162 48000, 96000,
163};
164
165static const struct snd_pcm_hw_constraint_list constraints_18432 = {
166 .count = ARRAY_SIZE(rates_18432),
167 .list = rates_18432,
168};
169
170static const unsigned int rates_22579[] = {
171 44100, 88235, 1764000
172};
173
174static const struct snd_pcm_hw_constraint_list constraints_22579 = {
175 .count = ARRAY_SIZE(rates_22579),
176 .list = rates_22579,
177};
178
179static const unsigned int rates_24576[] = {
180 32000, 48000, 96000, 192000
181};
182
183static const struct snd_pcm_hw_constraint_list constraints_24576 = {
184 .count = ARRAY_SIZE(rates_24576),
185 .list = rates_24576,
186};
187
188static const unsigned int rates_36864[] = {
189 48000, 96000, 19200
190};
191
192static const struct snd_pcm_hw_constraint_list constraints_36864 = {
193 .count = ARRAY_SIZE(rates_36864),
194 .list = rates_36864,
195};
196
197
198static int wm8741_startup(struct snd_pcm_substream *substream,
199 struct snd_soc_dai *dai)
200{
201 struct snd_soc_codec *codec = dai->codec;
202 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
203
204
205
206
207 if (!wm8741->sysclk) {
208 dev_err(codec->dev,
209 "No MCLK configured, call set_sysclk() on init\n");
210 return -EINVAL;
211 }
212
213 snd_pcm_hw_constraint_list(substream->runtime, 0,
214 SNDRV_PCM_HW_PARAM_RATE,
215 wm8741->sysclk_constraints);
216
217 return 0;
218}
219
220static int wm8741_hw_params(struct snd_pcm_substream *substream,
221 struct snd_pcm_hw_params *params,
222 struct snd_soc_dai *dai)
223{
224 struct snd_soc_codec *codec = dai->codec;
225 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
226 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
227 int i;
228
229
230 for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
231 if (wm8741->sysclk / params_rate(params) ==
232 lrclk_ratios[i].ratio)
233 break;
234 }
235
236
237 if (i == ARRAY_SIZE(lrclk_ratios)) {
238 dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
239 wm8741->sysclk / params_rate(params));
240 return -EINVAL;
241 }
242
243
244 switch (params_width(params)) {
245 case 16:
246 break;
247 case 20:
248 iface |= 0x0001;
249 break;
250 case 24:
251 iface |= 0x0002;
252 break;
253 case 32:
254 iface |= 0x0003;
255 break;
256 default:
257 dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
258 params_width(params));
259 return -EINVAL;
260 }
261
262 dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
263 params_width(params));
264
265 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
266 return 0;
267}
268
269static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
270 int clk_id, unsigned int freq, int dir)
271{
272 struct snd_soc_codec *codec = codec_dai->codec;
273 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
274
275 dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
276
277 switch (freq) {
278 case 11289600:
279 wm8741->sysclk_constraints = &constraints_11289;
280 wm8741->sysclk = freq;
281 return 0;
282
283 case 12288000:
284 wm8741->sysclk_constraints = &constraints_12288;
285 wm8741->sysclk = freq;
286 return 0;
287
288 case 16384000:
289 wm8741->sysclk_constraints = &constraints_16384;
290 wm8741->sysclk = freq;
291 return 0;
292
293 case 16934400:
294 wm8741->sysclk_constraints = &constraints_16934;
295 wm8741->sysclk = freq;
296 return 0;
297
298 case 18432000:
299 wm8741->sysclk_constraints = &constraints_18432;
300 wm8741->sysclk = freq;
301 return 0;
302
303 case 22579200:
304 case 33868800:
305 wm8741->sysclk_constraints = &constraints_22579;
306 wm8741->sysclk = freq;
307 return 0;
308
309 case 24576000:
310 wm8741->sysclk_constraints = &constraints_24576;
311 wm8741->sysclk = freq;
312 return 0;
313
314 case 36864000:
315 wm8741->sysclk_constraints = &constraints_36864;
316 wm8741->sysclk = freq;
317 return 0;
318 }
319 return -EINVAL;
320}
321
322static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
323 unsigned int fmt)
324{
325 struct snd_soc_codec *codec = codec_dai->codec;
326 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
327
328
329 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
330 case SND_SOC_DAIFMT_CBS_CFS:
331 break;
332 default:
333 return -EINVAL;
334 }
335
336
337 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
338 case SND_SOC_DAIFMT_I2S:
339 iface |= 0x0008;
340 break;
341 case SND_SOC_DAIFMT_RIGHT_J:
342 break;
343 case SND_SOC_DAIFMT_LEFT_J:
344 iface |= 0x0004;
345 break;
346 case SND_SOC_DAIFMT_DSP_A:
347 iface |= 0x000C;
348 break;
349 case SND_SOC_DAIFMT_DSP_B:
350 iface |= 0x001C;
351 break;
352 default:
353 return -EINVAL;
354 }
355
356
357 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
358 case SND_SOC_DAIFMT_NB_NF:
359 break;
360 case SND_SOC_DAIFMT_IB_IF:
361 iface |= 0x0010;
362 break;
363 case SND_SOC_DAIFMT_IB_NF:
364 iface |= 0x0020;
365 break;
366 case SND_SOC_DAIFMT_NB_IF:
367 iface |= 0x0030;
368 break;
369 default:
370 return -EINVAL;
371 }
372
373
374 dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
375 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
376 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
377
378 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
379 return 0;
380}
381
382#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
383 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
384 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
385 SNDRV_PCM_RATE_192000)
386
387#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
388 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
389
390static const struct snd_soc_dai_ops wm8741_dai_ops = {
391 .startup = wm8741_startup,
392 .hw_params = wm8741_hw_params,
393 .set_sysclk = wm8741_set_dai_sysclk,
394 .set_fmt = wm8741_set_dai_fmt,
395};
396
397static struct snd_soc_dai_driver wm8741_dai = {
398 .name = "wm8741",
399 .playback = {
400 .stream_name = "Playback",
401 .channels_min = 2,
402 .channels_max = 2,
403 .rates = WM8741_RATES,
404 .formats = WM8741_FORMATS,
405 },
406 .ops = &wm8741_dai_ops,
407};
408
409#ifdef CONFIG_PM
410static int wm8741_resume(struct snd_soc_codec *codec)
411{
412 snd_soc_cache_sync(codec);
413 return 0;
414}
415#else
416#define wm8741_resume NULL
417#endif
418
419static int wm8741_probe(struct snd_soc_codec *codec)
420{
421 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
422 int ret = 0;
423
424 ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
425 wm8741->supplies);
426 if (ret != 0) {
427 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
428 goto err_get;
429 }
430
431 ret = wm8741_reset(codec);
432 if (ret < 0) {
433 dev_err(codec->dev, "Failed to issue reset\n");
434 goto err_enable;
435 }
436
437
438 snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
439 WM8741_UPDATELL, WM8741_UPDATELL);
440 snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
441 WM8741_UPDATELM, WM8741_UPDATELM);
442 snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
443 WM8741_UPDATERL, WM8741_UPDATERL);
444 snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
445 WM8741_UPDATERM, WM8741_UPDATERM);
446
447 dev_dbg(codec->dev, "Successful registration\n");
448 return ret;
449
450err_enable:
451 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
452err_get:
453 return ret;
454}
455
456static int wm8741_remove(struct snd_soc_codec *codec)
457{
458 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
459
460 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
461
462 return 0;
463}
464
465static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
466 .probe = wm8741_probe,
467 .remove = wm8741_remove,
468 .resume = wm8741_resume,
469
470 .controls = wm8741_snd_controls,
471 .num_controls = ARRAY_SIZE(wm8741_snd_controls),
472 .dapm_widgets = wm8741_dapm_widgets,
473 .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
474 .dapm_routes = wm8741_dapm_routes,
475 .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
476};
477
478static const struct of_device_id wm8741_of_match[] = {
479 { .compatible = "wlf,wm8741", },
480 { }
481};
482MODULE_DEVICE_TABLE(of, wm8741_of_match);
483
484static const struct regmap_config wm8741_regmap = {
485 .reg_bits = 7,
486 .val_bits = 9,
487 .max_register = WM8741_MAX_REGISTER,
488
489 .reg_defaults = wm8741_reg_defaults,
490 .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
491 .cache_type = REGCACHE_RBTREE,
492
493 .readable_reg = wm8741_readable,
494};
495
496#if IS_ENABLED(CONFIG_I2C)
497static int wm8741_i2c_probe(struct i2c_client *i2c,
498 const struct i2c_device_id *id)
499{
500 struct wm8741_priv *wm8741;
501 int ret, i;
502
503 wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
504 GFP_KERNEL);
505 if (wm8741 == NULL)
506 return -ENOMEM;
507
508 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
509 wm8741->supplies[i].supply = wm8741_supply_names[i];
510
511 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
512 wm8741->supplies);
513 if (ret != 0) {
514 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
515 return ret;
516 }
517
518 wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
519 if (IS_ERR(wm8741->regmap)) {
520 ret = PTR_ERR(wm8741->regmap);
521 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
522 return ret;
523 }
524
525 i2c_set_clientdata(i2c, wm8741);
526
527 ret = snd_soc_register_codec(&i2c->dev,
528 &soc_codec_dev_wm8741, &wm8741_dai, 1);
529
530 return ret;
531}
532
533static int wm8741_i2c_remove(struct i2c_client *client)
534{
535 snd_soc_unregister_codec(&client->dev);
536 return 0;
537}
538
539static const struct i2c_device_id wm8741_i2c_id[] = {
540 { "wm8741", 0 },
541 { }
542};
543MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
544
545static struct i2c_driver wm8741_i2c_driver = {
546 .driver = {
547 .name = "wm8741",
548 .owner = THIS_MODULE,
549 .of_match_table = wm8741_of_match,
550 },
551 .probe = wm8741_i2c_probe,
552 .remove = wm8741_i2c_remove,
553 .id_table = wm8741_i2c_id,
554};
555#endif
556
557#if defined(CONFIG_SPI_MASTER)
558static int wm8741_spi_probe(struct spi_device *spi)
559{
560 struct wm8741_priv *wm8741;
561 int ret, i;
562
563 wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
564 GFP_KERNEL);
565 if (wm8741 == NULL)
566 return -ENOMEM;
567
568 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
569 wm8741->supplies[i].supply = wm8741_supply_names[i];
570
571 ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
572 wm8741->supplies);
573 if (ret != 0) {
574 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
575 return ret;
576 }
577
578 wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
579 if (IS_ERR(wm8741->regmap)) {
580 ret = PTR_ERR(wm8741->regmap);
581 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
582 return ret;
583 }
584
585 spi_set_drvdata(spi, wm8741);
586
587 ret = snd_soc_register_codec(&spi->dev,
588 &soc_codec_dev_wm8741, &wm8741_dai, 1);
589 return ret;
590}
591
592static int wm8741_spi_remove(struct spi_device *spi)
593{
594 snd_soc_unregister_codec(&spi->dev);
595 return 0;
596}
597
598static struct spi_driver wm8741_spi_driver = {
599 .driver = {
600 .name = "wm8741",
601 .owner = THIS_MODULE,
602 .of_match_table = wm8741_of_match,
603 },
604 .probe = wm8741_spi_probe,
605 .remove = wm8741_spi_remove,
606};
607#endif
608
609static int __init wm8741_modinit(void)
610{
611 int ret = 0;
612
613#if IS_ENABLED(CONFIG_I2C)
614 ret = i2c_add_driver(&wm8741_i2c_driver);
615 if (ret != 0)
616 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
617#endif
618#if defined(CONFIG_SPI_MASTER)
619 ret = spi_register_driver(&wm8741_spi_driver);
620 if (ret != 0) {
621 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
622 ret);
623 }
624#endif
625
626 return ret;
627}
628module_init(wm8741_modinit);
629
630static void __exit wm8741_exit(void)
631{
632#if defined(CONFIG_SPI_MASTER)
633 spi_unregister_driver(&wm8741_spi_driver);
634#endif
635#if IS_ENABLED(CONFIG_I2C)
636 i2c_del_driver(&wm8741_i2c_driver);
637#endif
638}
639module_exit(wm8741_exit);
640
641MODULE_DESCRIPTION("ASoC WM8741 driver");
642MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
643MODULE_LICENSE("GPL");
644
