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15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/delay.h>
19#include <linux/pm.h>
20#include <linux/i2c.h>
21#include <linux/of_device.h>
22#include <linux/regmap.h>
23#include <linux/spi/spi.h>
24#include <linux/slab.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 "wm8776.h"
33
34enum wm8776_chip_type {
35 WM8775 = 1,
36 WM8776,
37};
38
39
40struct wm8776_priv {
41 struct regmap *regmap;
42 int sysclk[2];
43};
44
45static const struct reg_default wm8776_reg_defaults[] = {
46 { 0, 0x79 },
47 { 1, 0x79 },
48 { 2, 0x79 },
49 { 3, 0xff },
50 { 4, 0xff },
51 { 5, 0xff },
52 { 6, 0x00 },
53 { 7, 0x90 },
54 { 8, 0x00 },
55 { 9, 0x00 },
56 { 10, 0x22 },
57 { 11, 0x22 },
58 { 12, 0x22 },
59 { 13, 0x08 },
60 { 14, 0xcf },
61 { 15, 0xcf },
62 { 16, 0x7b },
63 { 17, 0x00 },
64 { 18, 0x32 },
65 { 19, 0x00 },
66 { 20, 0xa6 },
67 { 21, 0x01 },
68 { 22, 0x01 },
69};
70
71static bool wm8776_volatile(struct device *dev, unsigned int reg)
72{
73 switch (reg) {
74 case WM8776_RESET:
75 return true;
76 default:
77 return false;
78 }
79}
80
81static int wm8776_reset(struct snd_soc_codec *codec)
82{
83 return snd_soc_write(codec, WM8776_RESET, 0);
84}
85
86static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
87static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
88static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
89
90static const struct snd_kcontrol_new wm8776_snd_controls[] = {
91SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
92 0, 127, 0, hp_tlv),
93SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
94 0, 255, 0, dac_tlv),
95SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
96
97SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
98
99SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
100 0, 255, 0, adc_tlv),
101SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
102SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
103SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
104};
105
106static const struct snd_kcontrol_new inmix_controls[] = {
107SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
108SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
109SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
110SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
111SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
112};
113
114static const struct snd_kcontrol_new outmix_controls[] = {
115SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
116SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
117SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
118};
119
120static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
121SND_SOC_DAPM_INPUT("AUX"),
122
123SND_SOC_DAPM_INPUT("AIN1"),
124SND_SOC_DAPM_INPUT("AIN2"),
125SND_SOC_DAPM_INPUT("AIN3"),
126SND_SOC_DAPM_INPUT("AIN4"),
127SND_SOC_DAPM_INPUT("AIN5"),
128
129SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
130 inmix_controls, ARRAY_SIZE(inmix_controls)),
131
132SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
133SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
134
135SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
136 outmix_controls, ARRAY_SIZE(outmix_controls)),
137
138SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
139
140SND_SOC_DAPM_OUTPUT("VOUT"),
141
142SND_SOC_DAPM_OUTPUT("HPOUTL"),
143SND_SOC_DAPM_OUTPUT("HPOUTR"),
144};
145
146static const struct snd_soc_dapm_route routes[] = {
147 { "Input Mixer", "AIN1 Switch", "AIN1" },
148 { "Input Mixer", "AIN2 Switch", "AIN2" },
149 { "Input Mixer", "AIN3 Switch", "AIN3" },
150 { "Input Mixer", "AIN4 Switch", "AIN4" },
151 { "Input Mixer", "AIN5 Switch", "AIN5" },
152
153 { "ADC", NULL, "Input Mixer" },
154
155 { "Output Mixer", "DAC Switch", "DAC" },
156 { "Output Mixer", "AUX Switch", "AUX" },
157 { "Output Mixer", "Bypass Switch", "Input Mixer" },
158
159 { "VOUT", NULL, "Output Mixer" },
160
161 { "Headphone PGA", NULL, "Output Mixer" },
162
163 { "HPOUTL", NULL, "Headphone PGA" },
164 { "HPOUTR", NULL, "Headphone PGA" },
165};
166
167static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
168{
169 struct snd_soc_codec *codec = dai->codec;
170 int reg, iface, master;
171
172 switch (dai->driver->id) {
173 case WM8776_DAI_DAC:
174 reg = WM8776_DACIFCTRL;
175 master = 0x80;
176 break;
177 case WM8776_DAI_ADC:
178 reg = WM8776_ADCIFCTRL;
179 master = 0x100;
180 break;
181 default:
182 return -EINVAL;
183 }
184
185 iface = 0;
186
187 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
188 case SND_SOC_DAIFMT_CBM_CFM:
189 break;
190 case SND_SOC_DAIFMT_CBS_CFS:
191 master = 0;
192 break;
193 default:
194 return -EINVAL;
195 }
196
197 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
198 case SND_SOC_DAIFMT_I2S:
199 iface |= 0x0002;
200 break;
201 case SND_SOC_DAIFMT_RIGHT_J:
202 break;
203 case SND_SOC_DAIFMT_LEFT_J:
204 iface |= 0x0001;
205 break;
206 default:
207 return -EINVAL;
208 }
209
210 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
211 case SND_SOC_DAIFMT_NB_NF:
212 break;
213 case SND_SOC_DAIFMT_IB_IF:
214 iface |= 0x00c;
215 break;
216 case SND_SOC_DAIFMT_IB_NF:
217 iface |= 0x008;
218 break;
219 case SND_SOC_DAIFMT_NB_IF:
220 iface |= 0x004;
221 break;
222 default:
223 return -EINVAL;
224 }
225
226
227 snd_soc_update_bits(codec, reg, 0xf, iface);
228 snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
229
230 return 0;
231}
232
233static int mclk_ratios[] = {
234 128,
235 192,
236 256,
237 384,
238 512,
239 768,
240};
241
242static int wm8776_hw_params(struct snd_pcm_substream *substream,
243 struct snd_pcm_hw_params *params,
244 struct snd_soc_dai *dai)
245{
246 struct snd_soc_codec *codec = dai->codec;
247 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
248 int iface_reg, iface;
249 int ratio_shift, master;
250 int i;
251
252 switch (dai->driver->id) {
253 case WM8776_DAI_DAC:
254 iface_reg = WM8776_DACIFCTRL;
255 master = 0x80;
256 ratio_shift = 4;
257 break;
258 case WM8776_DAI_ADC:
259 iface_reg = WM8776_ADCIFCTRL;
260 master = 0x100;
261 ratio_shift = 0;
262 break;
263 default:
264 return -EINVAL;
265 }
266
267
268 switch (params_width(params)) {
269 case 16:
270 iface = 0;
271 break;
272 case 20:
273 iface = 0x10;
274 break;
275 case 24:
276 iface = 0x20;
277 break;
278 case 32:
279 iface = 0x30;
280 break;
281 default:
282 dev_err(codec->dev, "Unsupported sample size: %i\n",
283 params_width(params));
284 return -EINVAL;
285 }
286
287
288 if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
289 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
290 if (wm8776->sysclk[dai->driver->id] / params_rate(params)
291 == mclk_ratios[i])
292 break;
293 }
294
295 if (i == ARRAY_SIZE(mclk_ratios)) {
296 dev_err(codec->dev,
297 "Unable to configure MCLK ratio %d/%d\n",
298 wm8776->sysclk[dai->driver->id], params_rate(params));
299 return -EINVAL;
300 }
301
302 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
303
304 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
305 0x7 << ratio_shift, i << ratio_shift);
306 } else {
307 dev_dbg(codec->dev, "DAI in slave mode\n");
308 }
309
310 snd_soc_update_bits(codec, iface_reg, 0x30, iface);
311
312 return 0;
313}
314
315static int wm8776_mute(struct snd_soc_dai *dai, int mute)
316{
317 struct snd_soc_codec *codec = dai->codec;
318
319 return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
320}
321
322static int wm8776_set_sysclk(struct snd_soc_dai *dai,
323 int clk_id, unsigned int freq, int dir)
324{
325 struct snd_soc_codec *codec = dai->codec;
326 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
327
328 if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
329 return -EINVAL;
330
331 wm8776->sysclk[dai->driver->id] = freq;
332
333 return 0;
334}
335
336static int wm8776_set_bias_level(struct snd_soc_codec *codec,
337 enum snd_soc_bias_level level)
338{
339 struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
340
341 switch (level) {
342 case SND_SOC_BIAS_ON:
343 break;
344 case SND_SOC_BIAS_PREPARE:
345 break;
346 case SND_SOC_BIAS_STANDBY:
347 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
348 regcache_sync(wm8776->regmap);
349
350
351 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
352 }
353
354 break;
355 case SND_SOC_BIAS_OFF:
356 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
357 break;
358 }
359
360 return 0;
361}
362
363#define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
364 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
365
366static const struct snd_soc_dai_ops wm8776_dac_ops = {
367 .digital_mute = wm8776_mute,
368 .hw_params = wm8776_hw_params,
369 .set_fmt = wm8776_set_fmt,
370 .set_sysclk = wm8776_set_sysclk,
371};
372
373static const struct snd_soc_dai_ops wm8776_adc_ops = {
374 .hw_params = wm8776_hw_params,
375 .set_fmt = wm8776_set_fmt,
376 .set_sysclk = wm8776_set_sysclk,
377};
378
379static struct snd_soc_dai_driver wm8776_dai[] = {
380 {
381 .name = "wm8776-hifi-playback",
382 .id = WM8776_DAI_DAC,
383 .playback = {
384 .stream_name = "Playback",
385 .channels_min = 2,
386 .channels_max = 2,
387 .rates = SNDRV_PCM_RATE_CONTINUOUS,
388 .rate_min = 32000,
389 .rate_max = 192000,
390 .formats = WM8776_FORMATS,
391 },
392 .ops = &wm8776_dac_ops,
393 },
394 {
395 .name = "wm8776-hifi-capture",
396 .id = WM8776_DAI_ADC,
397 .capture = {
398 .stream_name = "Capture",
399 .channels_min = 2,
400 .channels_max = 2,
401 .rates = SNDRV_PCM_RATE_CONTINUOUS,
402 .rate_min = 32000,
403 .rate_max = 96000,
404 .formats = WM8776_FORMATS,
405 },
406 .ops = &wm8776_adc_ops,
407 },
408};
409
410static int wm8776_probe(struct snd_soc_codec *codec)
411{
412 int ret = 0;
413
414 ret = wm8776_reset(codec);
415 if (ret < 0) {
416 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
417 return ret;
418 }
419
420
421
422 snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
423 snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
424
425 return ret;
426}
427
428static const struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
429 .probe = wm8776_probe,
430 .set_bias_level = wm8776_set_bias_level,
431 .suspend_bias_off = true,
432
433 .component_driver = {
434 .controls = wm8776_snd_controls,
435 .num_controls = ARRAY_SIZE(wm8776_snd_controls),
436 .dapm_widgets = wm8776_dapm_widgets,
437 .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
438 .dapm_routes = routes,
439 .num_dapm_routes = ARRAY_SIZE(routes),
440 },
441};
442
443static const struct of_device_id wm8776_of_match[] = {
444 { .compatible = "wlf,wm8776", },
445 { }
446};
447MODULE_DEVICE_TABLE(of, wm8776_of_match);
448
449static const struct regmap_config wm8776_regmap = {
450 .reg_bits = 7,
451 .val_bits = 9,
452 .max_register = WM8776_RESET,
453
454 .reg_defaults = wm8776_reg_defaults,
455 .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
456 .cache_type = REGCACHE_RBTREE,
457
458 .volatile_reg = wm8776_volatile,
459};
460
461#if defined(CONFIG_SPI_MASTER)
462static int wm8776_spi_probe(struct spi_device *spi)
463{
464 struct wm8776_priv *wm8776;
465 int ret;
466
467 wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
468 GFP_KERNEL);
469 if (wm8776 == NULL)
470 return -ENOMEM;
471
472 wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
473 if (IS_ERR(wm8776->regmap))
474 return PTR_ERR(wm8776->regmap);
475
476 spi_set_drvdata(spi, wm8776);
477
478 ret = snd_soc_register_codec(&spi->dev,
479 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
480
481 return ret;
482}
483
484static int wm8776_spi_remove(struct spi_device *spi)
485{
486 snd_soc_unregister_codec(&spi->dev);
487 return 0;
488}
489
490static struct spi_driver wm8776_spi_driver = {
491 .driver = {
492 .name = "wm8776",
493 .of_match_table = wm8776_of_match,
494 },
495 .probe = wm8776_spi_probe,
496 .remove = wm8776_spi_remove,
497};
498#endif
499
500#if IS_ENABLED(CONFIG_I2C)
501static int wm8776_i2c_probe(struct i2c_client *i2c,
502 const struct i2c_device_id *id)
503{
504 struct wm8776_priv *wm8776;
505 int ret;
506
507 wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
508 GFP_KERNEL);
509 if (wm8776 == NULL)
510 return -ENOMEM;
511
512 wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
513 if (IS_ERR(wm8776->regmap))
514 return PTR_ERR(wm8776->regmap);
515
516 i2c_set_clientdata(i2c, wm8776);
517
518 ret = snd_soc_register_codec(&i2c->dev,
519 &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
520
521 return ret;
522}
523
524static int wm8776_i2c_remove(struct i2c_client *client)
525{
526 snd_soc_unregister_codec(&client->dev);
527 return 0;
528}
529
530static const struct i2c_device_id wm8776_i2c_id[] = {
531 { "wm8775", WM8775 },
532 { "wm8776", WM8776 },
533 { }
534};
535MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
536
537static struct i2c_driver wm8776_i2c_driver = {
538 .driver = {
539 .name = "wm8776",
540 .of_match_table = wm8776_of_match,
541 },
542 .probe = wm8776_i2c_probe,
543 .remove = wm8776_i2c_remove,
544 .id_table = wm8776_i2c_id,
545};
546#endif
547
548static int __init wm8776_modinit(void)
549{
550 int ret = 0;
551#if IS_ENABLED(CONFIG_I2C)
552 ret = i2c_add_driver(&wm8776_i2c_driver);
553 if (ret != 0) {
554 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
555 ret);
556 }
557#endif
558#if defined(CONFIG_SPI_MASTER)
559 ret = spi_register_driver(&wm8776_spi_driver);
560 if (ret != 0) {
561 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
562 ret);
563 }
564#endif
565 return ret;
566}
567module_init(wm8776_modinit);
568
569static void __exit wm8776_exit(void)
570{
571#if IS_ENABLED(CONFIG_I2C)
572 i2c_del_driver(&wm8776_i2c_driver);
573#endif
574#if defined(CONFIG_SPI_MASTER)
575 spi_unregister_driver(&wm8776_spi_driver);
576#endif
577}
578module_exit(wm8776_exit);
579
580MODULE_DESCRIPTION("ASoC WM8776 driver");
581MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
582MODULE_LICENSE("GPL");
583
