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/mod_devicetable.h> |
13 | #include <linux/module.h> |
14 | #include <linux/moduleparam.h> |
15 | #include <linux/init.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/pm.h> |
18 | #include <linux/i2c.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 | |
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 | |
78 | static int wm8776_reset(struct snd_soc_component *component) |
79 | { |
80 | return snd_soc_component_write(component, WM8776_RESET, val: 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 | |
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, mask: 0xf, val: iface); |
225 | snd_soc_component_update_bits(component, WM8776_MSTRCTRL, mask: 0x180, val: 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 | |
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(c: 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(p: 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(p: 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 | mask: 0x7 << ratio_shift, val: i << ratio_shift); |
303 | } else { |
304 | dev_dbg(component->dev, "DAI in slave mode\n" ); |
305 | } |
306 | |
307 | snd_soc_component_update_bits(component, reg: iface_reg, mask: 0x30, val: iface); |
308 | |
309 | return 0; |
310 | } |
311 | |
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, val: !!mute); |
317 | } |
318 | |
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(c: 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 | |
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(c: 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(map: wm8776->regmap); |
346 | |
347 | /* Disable the global powerdown; DAPM does the rest */ |
348 | snd_soc_component_update_bits(component, WM8776_PWRDOWN, mask: 1, val: 0); |
349 | } |
350 | |
351 | break; |
352 | case SND_SOC_BIAS_OFF: |
353 | snd_soc_component_update_bits(component, WM8776_PWRDOWN, mask: 1, val: 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 | |
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, mask: 0x100, val: 0x100); |
421 | snd_soc_component_update_bits(component, WM8776_DACRVOL, mask: 0x100, val: 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_MAPLE, |
455 | |
456 | .volatile_reg = wm8776_volatile, |
457 | }; |
458 | |
459 | #if defined(CONFIG_SPI_MASTER) |
460 | static int wm8776_spi_probe(struct spi_device *spi) |
461 | { |
462 | struct wm8776_priv *wm8776; |
463 | int ret; |
464 | |
465 | wm8776 = devm_kzalloc(dev: &spi->dev, size: 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(ptr: wm8776->regmap)) |
472 | return PTR_ERR(ptr: wm8776->regmap); |
473 | |
474 | spi_set_drvdata(spi, data: wm8776); |
475 | |
476 | ret = devm_snd_soc_register_component(dev: &spi->dev, |
477 | component_driver: &soc_component_dev_wm8776, dai_drv: 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) |
492 | static int wm8776_i2c_probe(struct i2c_client *i2c) |
493 | { |
494 | struct wm8776_priv *wm8776; |
495 | int ret; |
496 | |
497 | wm8776 = devm_kzalloc(dev: &i2c->dev, size: 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(ptr: wm8776->regmap)) |
504 | return PTR_ERR(ptr: wm8776->regmap); |
505 | |
506 | i2c_set_clientdata(client: i2c, data: wm8776); |
507 | |
508 | ret = devm_snd_soc_register_component(dev: &i2c->dev, |
509 | component_driver: &soc_component_dev_wm8776, dai_drv: 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 = wm8776_i2c_probe, |
527 | .id_table = wm8776_i2c_id, |
528 | }; |
529 | #endif |
530 | |
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 | |
552 | static void __exit wm8776_exit(void) |
553 | { |
554 | #if IS_ENABLED(CONFIG_I2C) |
555 | i2c_del_driver(driver: &wm8776_i2c_driver); |
556 | #endif |
557 | #if defined(CONFIG_SPI_MASTER) |
558 | spi_unregister_driver(sdrv: &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 | |