1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * wm8776.c -- WM8776 ALSA SoC Audio driver
4 *
5 * Copyright 2009-12 Wolfson Microelectronics plc
6 *
7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 *
9 * TODO: Input ALC/limiter support
10 */
11
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pm.h>
17 #include <linux/i2c.h>
18 #include <linux/of_device.h>
19 #include <linux/regmap.h>
20 #include <linux/spi/spi.h>
21 #include <linux/slab.h>
22 #include <sound/core.h>
23 #include <sound/pcm.h>
24 #include <sound/pcm_params.h>
25 #include <sound/soc.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28
29 #include "wm8776.h"
30
31 enum wm8776_chip_type {
32 WM8775 = 1,
33 WM8776,
34 };
35
36 /* codec private data */
37 struct wm8776_priv {
38 struct regmap *regmap;
39 int sysclk[2];
40 };
41
42 static const struct reg_default wm8776_reg_defaults[] = {
43 { 0, 0x79 },
44 { 1, 0x79 },
45 { 2, 0x79 },
46 { 3, 0xff },
47 { 4, 0xff },
48 { 5, 0xff },
49 { 6, 0x00 },
50 { 7, 0x90 },
51 { 8, 0x00 },
52 { 9, 0x00 },
53 { 10, 0x22 },
54 { 11, 0x22 },
55 { 12, 0x22 },
56 { 13, 0x08 },
57 { 14, 0xcf },
58 { 15, 0xcf },
59 { 16, 0x7b },
60 { 17, 0x00 },
61 { 18, 0x32 },
62 { 19, 0x00 },
63 { 20, 0xa6 },
64 { 21, 0x01 },
65 { 22, 0x01 },
66 };
67
wm8776_volatile(struct device * dev,unsigned int reg)68 static bool wm8776_volatile(struct device *dev, unsigned int reg)
69 {
70 switch (reg) {
71 case WM8776_RESET:
72 return true;
73 default:
74 return false;
75 }
76 }
77
wm8776_reset(struct snd_soc_component * component)78 static int wm8776_reset(struct snd_soc_component *component)
79 {
80 return snd_soc_component_write(component, WM8776_RESET, 0);
81 }
82
83 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
84 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
85 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
86
87 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
88 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
89 0, 127, 0, hp_tlv),
90 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
91 0, 255, 0, dac_tlv),
92 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
93
94 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
95
96 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
97 0, 255, 0, adc_tlv),
98 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
99 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
100 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
101 };
102
103 static const struct snd_kcontrol_new inmix_controls[] = {
104 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
105 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
106 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
107 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
108 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
109 };
110
111 static const struct snd_kcontrol_new outmix_controls[] = {
112 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
113 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
114 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
115 };
116
117 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
118 SND_SOC_DAPM_INPUT("AUX"),
119
120 SND_SOC_DAPM_INPUT("AIN1"),
121 SND_SOC_DAPM_INPUT("AIN2"),
122 SND_SOC_DAPM_INPUT("AIN3"),
123 SND_SOC_DAPM_INPUT("AIN4"),
124 SND_SOC_DAPM_INPUT("AIN5"),
125
126 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
127 inmix_controls, ARRAY_SIZE(inmix_controls)),
128
129 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
130 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
131
132 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
133 outmix_controls, ARRAY_SIZE(outmix_controls)),
134
135 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
136
137 SND_SOC_DAPM_OUTPUT("VOUT"),
138
139 SND_SOC_DAPM_OUTPUT("HPOUTL"),
140 SND_SOC_DAPM_OUTPUT("HPOUTR"),
141 };
142
143 static const struct snd_soc_dapm_route routes[] = {
144 { "Input Mixer", "AIN1 Switch", "AIN1" },
145 { "Input Mixer", "AIN2 Switch", "AIN2" },
146 { "Input Mixer", "AIN3 Switch", "AIN3" },
147 { "Input Mixer", "AIN4 Switch", "AIN4" },
148 { "Input Mixer", "AIN5 Switch", "AIN5" },
149
150 { "ADC", NULL, "Input Mixer" },
151
152 { "Output Mixer", "DAC Switch", "DAC" },
153 { "Output Mixer", "AUX Switch", "AUX" },
154 { "Output Mixer", "Bypass Switch", "Input Mixer" },
155
156 { "VOUT", NULL, "Output Mixer" },
157
158 { "Headphone PGA", NULL, "Output Mixer" },
159
160 { "HPOUTL", NULL, "Headphone PGA" },
161 { "HPOUTR", NULL, "Headphone PGA" },
162 };
163
wm8776_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)164 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
165 {
166 struct snd_soc_component *component = dai->component;
167 int reg, iface, master;
168
169 switch (dai->driver->id) {
170 case WM8776_DAI_DAC:
171 reg = WM8776_DACIFCTRL;
172 master = 0x80;
173 break;
174 case WM8776_DAI_ADC:
175 reg = WM8776_ADCIFCTRL;
176 master = 0x100;
177 break;
178 default:
179 return -EINVAL;
180 }
181
182 iface = 0;
183
184 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
185 case SND_SOC_DAIFMT_CBM_CFM:
186 break;
187 case SND_SOC_DAIFMT_CBS_CFS:
188 master = 0;
189 break;
190 default:
191 return -EINVAL;
192 }
193
194 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
195 case SND_SOC_DAIFMT_I2S:
196 iface |= 0x0002;
197 break;
198 case SND_SOC_DAIFMT_RIGHT_J:
199 break;
200 case SND_SOC_DAIFMT_LEFT_J:
201 iface |= 0x0001;
202 break;
203 default:
204 return -EINVAL;
205 }
206
207 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
208 case SND_SOC_DAIFMT_NB_NF:
209 break;
210 case SND_SOC_DAIFMT_IB_IF:
211 iface |= 0x00c;
212 break;
213 case SND_SOC_DAIFMT_IB_NF:
214 iface |= 0x008;
215 break;
216 case SND_SOC_DAIFMT_NB_IF:
217 iface |= 0x004;
218 break;
219 default:
220 return -EINVAL;
221 }
222
223 /* Finally, write out the values */
224 snd_soc_component_update_bits(component, reg, 0xf, iface);
225 snd_soc_component_update_bits(component, WM8776_MSTRCTRL, 0x180, master);
226
227 return 0;
228 }
229
230 static int mclk_ratios[] = {
231 128,
232 192,
233 256,
234 384,
235 512,
236 768,
237 };
238
wm8776_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)239 static int wm8776_hw_params(struct snd_pcm_substream *substream,
240 struct snd_pcm_hw_params *params,
241 struct snd_soc_dai *dai)
242 {
243 struct snd_soc_component *component = dai->component;
244 struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
245 int iface_reg, iface;
246 int ratio_shift, master;
247 int i;
248
249 switch (dai->driver->id) {
250 case WM8776_DAI_DAC:
251 iface_reg = WM8776_DACIFCTRL;
252 master = 0x80;
253 ratio_shift = 4;
254 break;
255 case WM8776_DAI_ADC:
256 iface_reg = WM8776_ADCIFCTRL;
257 master = 0x100;
258 ratio_shift = 0;
259 break;
260 default:
261 return -EINVAL;
262 }
263
264 /* Set word length */
265 switch (params_width(params)) {
266 case 16:
267 iface = 0;
268 break;
269 case 20:
270 iface = 0x10;
271 break;
272 case 24:
273 iface = 0x20;
274 break;
275 case 32:
276 iface = 0x30;
277 break;
278 default:
279 dev_err(component->dev, "Unsupported sample size: %i\n",
280 params_width(params));
281 return -EINVAL;
282 }
283
284 /* Only need to set MCLK/LRCLK ratio if we're master */
285 if (snd_soc_component_read(component, WM8776_MSTRCTRL) & master) {
286 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
287 if (wm8776->sysclk[dai->driver->id] / params_rate(params)
288 == mclk_ratios[i])
289 break;
290 }
291
292 if (i == ARRAY_SIZE(mclk_ratios)) {
293 dev_err(component->dev,
294 "Unable to configure MCLK ratio %d/%d\n",
295 wm8776->sysclk[dai->driver->id], params_rate(params));
296 return -EINVAL;
297 }
298
299 dev_dbg(component->dev, "MCLK is %dfs\n", mclk_ratios[i]);
300
301 snd_soc_component_update_bits(component, WM8776_MSTRCTRL,
302 0x7 << ratio_shift, i << ratio_shift);
303 } else {
304 dev_dbg(component->dev, "DAI in slave mode\n");
305 }
306
307 snd_soc_component_update_bits(component, iface_reg, 0x30, iface);
308
309 return 0;
310 }
311
wm8776_mute(struct snd_soc_dai * dai,int mute,int direction)312 static int wm8776_mute(struct snd_soc_dai *dai, int mute, int direction)
313 {
314 struct snd_soc_component *component = dai->component;
315
316 return snd_soc_component_write(component, WM8776_DACMUTE, !!mute);
317 }
318
wm8776_set_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)319 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
320 int clk_id, unsigned int freq, int dir)
321 {
322 struct snd_soc_component *component = dai->component;
323 struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
324
325 if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
326 return -EINVAL;
327
328 wm8776->sysclk[dai->driver->id] = freq;
329
330 return 0;
331 }
332
wm8776_set_bias_level(struct snd_soc_component * component,enum snd_soc_bias_level level)333 static int wm8776_set_bias_level(struct snd_soc_component *component,
334 enum snd_soc_bias_level level)
335 {
336 struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
337
338 switch (level) {
339 case SND_SOC_BIAS_ON:
340 break;
341 case SND_SOC_BIAS_PREPARE:
342 break;
343 case SND_SOC_BIAS_STANDBY:
344 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
345 regcache_sync(wm8776->regmap);
346
347 /* Disable the global powerdown; DAPM does the rest */
348 snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 0);
349 }
350
351 break;
352 case SND_SOC_BIAS_OFF:
353 snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 1);
354 break;
355 }
356
357 return 0;
358 }
359
360 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
361 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
362
363 static const struct snd_soc_dai_ops wm8776_dac_ops = {
364 .mute_stream = wm8776_mute,
365 .hw_params = wm8776_hw_params,
366 .set_fmt = wm8776_set_fmt,
367 .set_sysclk = wm8776_set_sysclk,
368 .no_capture_mute = 1,
369 };
370
371 static const struct snd_soc_dai_ops wm8776_adc_ops = {
372 .hw_params = wm8776_hw_params,
373 .set_fmt = wm8776_set_fmt,
374 .set_sysclk = wm8776_set_sysclk,
375 };
376
377 static struct snd_soc_dai_driver wm8776_dai[] = {
378 {
379 .name = "wm8776-hifi-playback",
380 .id = WM8776_DAI_DAC,
381 .playback = {
382 .stream_name = "Playback",
383 .channels_min = 2,
384 .channels_max = 2,
385 .rates = SNDRV_PCM_RATE_CONTINUOUS,
386 .rate_min = 32000,
387 .rate_max = 192000,
388 .formats = WM8776_FORMATS,
389 },
390 .ops = &wm8776_dac_ops,
391 },
392 {
393 .name = "wm8776-hifi-capture",
394 .id = WM8776_DAI_ADC,
395 .capture = {
396 .stream_name = "Capture",
397 .channels_min = 2,
398 .channels_max = 2,
399 .rates = SNDRV_PCM_RATE_CONTINUOUS,
400 .rate_min = 32000,
401 .rate_max = 96000,
402 .formats = WM8776_FORMATS,
403 },
404 .ops = &wm8776_adc_ops,
405 },
406 };
407
wm8776_probe(struct snd_soc_component * component)408 static int wm8776_probe(struct snd_soc_component *component)
409 {
410 int ret = 0;
411
412 ret = wm8776_reset(component);
413 if (ret < 0) {
414 dev_err(component->dev, "Failed to issue reset: %d\n", ret);
415 return ret;
416 }
417
418 /* Latch the update bits; right channel only since we always
419 * update both. */
420 snd_soc_component_update_bits(component, WM8776_HPRVOL, 0x100, 0x100);
421 snd_soc_component_update_bits(component, WM8776_DACRVOL, 0x100, 0x100);
422
423 return ret;
424 }
425
426 static const struct snd_soc_component_driver soc_component_dev_wm8776 = {
427 .probe = wm8776_probe,
428 .set_bias_level = wm8776_set_bias_level,
429 .controls = wm8776_snd_controls,
430 .num_controls = ARRAY_SIZE(wm8776_snd_controls),
431 .dapm_widgets = wm8776_dapm_widgets,
432 .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
433 .dapm_routes = routes,
434 .num_dapm_routes = ARRAY_SIZE(routes),
435 .suspend_bias_off = 1,
436 .idle_bias_on = 1,
437 .use_pmdown_time = 1,
438 .endianness = 1,
439 };
440
441 static const struct of_device_id wm8776_of_match[] = {
442 { .compatible = "wlf,wm8776", },
443 { }
444 };
445 MODULE_DEVICE_TABLE(of, wm8776_of_match);
446
447 static const struct regmap_config wm8776_regmap = {
448 .reg_bits = 7,
449 .val_bits = 9,
450 .max_register = WM8776_RESET,
451
452 .reg_defaults = wm8776_reg_defaults,
453 .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
454 .cache_type = REGCACHE_RBTREE,
455
456 .volatile_reg = wm8776_volatile,
457 };
458
459 #if defined(CONFIG_SPI_MASTER)
wm8776_spi_probe(struct spi_device * spi)460 static int wm8776_spi_probe(struct spi_device *spi)
461 {
462 struct wm8776_priv *wm8776;
463 int ret;
464
465 wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
466 GFP_KERNEL);
467 if (wm8776 == NULL)
468 return -ENOMEM;
469
470 wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
471 if (IS_ERR(wm8776->regmap))
472 return PTR_ERR(wm8776->regmap);
473
474 spi_set_drvdata(spi, wm8776);
475
476 ret = devm_snd_soc_register_component(&spi->dev,
477 &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
478
479 return ret;
480 }
481
482 static struct spi_driver wm8776_spi_driver = {
483 .driver = {
484 .name = "wm8776",
485 .of_match_table = wm8776_of_match,
486 },
487 .probe = wm8776_spi_probe,
488 };
489 #endif /* CONFIG_SPI_MASTER */
490
491 #if IS_ENABLED(CONFIG_I2C)
wm8776_i2c_probe(struct i2c_client * i2c)492 static int wm8776_i2c_probe(struct i2c_client *i2c)
493 {
494 struct wm8776_priv *wm8776;
495 int ret;
496
497 wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
498 GFP_KERNEL);
499 if (wm8776 == NULL)
500 return -ENOMEM;
501
502 wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
503 if (IS_ERR(wm8776->regmap))
504 return PTR_ERR(wm8776->regmap);
505
506 i2c_set_clientdata(i2c, wm8776);
507
508 ret = devm_snd_soc_register_component(&i2c->dev,
509 &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
510
511 return ret;
512 }
513
514 static const struct i2c_device_id wm8776_i2c_id[] = {
515 { "wm8775", WM8775 },
516 { "wm8776", WM8776 },
517 { }
518 };
519 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
520
521 static struct i2c_driver wm8776_i2c_driver = {
522 .driver = {
523 .name = "wm8776",
524 .of_match_table = wm8776_of_match,
525 },
526 .probe_new = wm8776_i2c_probe,
527 .id_table = wm8776_i2c_id,
528 };
529 #endif
530
wm8776_modinit(void)531 static int __init wm8776_modinit(void)
532 {
533 int ret = 0;
534 #if IS_ENABLED(CONFIG_I2C)
535 ret = i2c_add_driver(&wm8776_i2c_driver);
536 if (ret != 0) {
537 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
538 ret);
539 }
540 #endif
541 #if defined(CONFIG_SPI_MASTER)
542 ret = spi_register_driver(&wm8776_spi_driver);
543 if (ret != 0) {
544 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
545 ret);
546 }
547 #endif
548 return ret;
549 }
550 module_init(wm8776_modinit);
551
wm8776_exit(void)552 static void __exit wm8776_exit(void)
553 {
554 #if IS_ENABLED(CONFIG_I2C)
555 i2c_del_driver(&wm8776_i2c_driver);
556 #endif
557 #if defined(CONFIG_SPI_MASTER)
558 spi_unregister_driver(&wm8776_spi_driver);
559 #endif
560 }
561 module_exit(wm8776_exit);
562
563 MODULE_DESCRIPTION("ASoC WM8776 driver");
564 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
565 MODULE_LICENSE("GPL");
566
