2 * wm8974.c -- WM8974 ALSA Soc Audio driver
4 * Copyright 2006-2009 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
18 #include <linux/i2c.h>
19 #include <linux/regmap.h>
20 #include <linux/slab.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25 #include <sound/initval.h>
26 #include <sound/tlv.h>
35 static const struct reg_default wm8974_reg_defaults[] = {
36 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 },
37 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 },
38 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
39 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
40 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
41 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
42 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
43 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
44 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
45 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
46 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
47 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
48 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
49 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
53 #define WM8974_POWER1_BIASEN 0x08
54 #define WM8974_POWER1_BUFIOEN 0x04
56 #define wm8974_reset(c) snd_soc_component_write(c, WM8974_RESET, 0)
58 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
59 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
60 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
61 static const char *wm8974_bw[] = {"Narrow", "Wide" };
62 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
63 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
64 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
65 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
66 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
67 static const char *wm8974_alc[] = {"ALC", "Limiter" };
69 static const struct soc_enum wm8974_enum[] = {
70 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
71 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
72 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
73 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
75 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
76 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
77 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
78 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
80 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
81 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
82 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
83 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
85 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
86 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
89 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
91 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
92 WM8974_INPUT, 3, wm8974_auxmode_text);
94 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
95 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
96 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
97 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
99 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
101 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
103 SOC_ENUM("DAC Companding", wm8974_enum[1]),
104 SOC_ENUM("ADC Companding", wm8974_enum[0]),
106 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
107 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
109 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
111 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
112 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
113 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
115 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
117 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
118 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
119 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
121 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
122 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
123 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
125 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
126 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
127 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
129 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
130 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
131 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
133 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
134 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
135 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
137 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
138 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
139 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
141 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
142 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
144 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
145 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
146 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
148 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
149 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
150 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
152 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
153 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
154 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
157 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
159 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
160 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
162 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
163 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
164 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
166 SOC_ENUM("Aux Mode", wm8974_auxmode),
168 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
169 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
171 /* DAC / ADC oversampling */
172 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
173 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
176 /* Speaker Output Mixer */
177 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
178 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
179 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
180 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
183 /* Mono Output Mixer */
184 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
186 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
187 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
191 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
196 static const struct snd_kcontrol_new wm8974_inpga[] = {
197 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
198 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
199 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
202 /* AUX Input boost vol */
203 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
204 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
206 /* Mic Input boost vol */
207 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
208 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
210 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
211 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
212 &wm8974_speaker_mixer_controls[0],
213 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
214 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
215 &wm8974_mono_mixer_controls[0],
216 ARRAY_SIZE(wm8974_mono_mixer_controls)),
217 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
218 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
219 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
220 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
221 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
222 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
224 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
225 ARRAY_SIZE(wm8974_inpga)),
226 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
227 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
229 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
231 SND_SOC_DAPM_INPUT("MICN"),
232 SND_SOC_DAPM_INPUT("MICP"),
233 SND_SOC_DAPM_INPUT("AUX"),
234 SND_SOC_DAPM_OUTPUT("MONOOUT"),
235 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
236 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
239 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
240 /* Mono output mixer */
241 {"Mono Mixer", "PCM Playback Switch", "DAC"},
242 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
243 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
245 /* Speaker output mixer */
246 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
247 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
248 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
251 {"Mono Out", NULL, "Mono Mixer"},
252 {"MONOOUT", NULL, "Mono Out"},
253 {"SpkN Out", NULL, "Speaker Mixer"},
254 {"SpkP Out", NULL, "Speaker Mixer"},
255 {"SPKOUTN", NULL, "SpkN Out"},
256 {"SPKOUTP", NULL, "SpkP Out"},
259 {"ADC", NULL, "Boost Mixer"},
260 {"Boost Mixer", "Aux Switch", "Aux Input"},
261 {"Boost Mixer", NULL, "Input PGA"},
262 {"Boost Mixer", NULL, "MICP"},
265 {"Input PGA", "Aux Switch", "Aux Input"},
266 {"Input PGA", "MicN Switch", "MICN"},
267 {"Input PGA", "MicP Switch", "MICP"},
270 {"Aux Input", NULL, "AUX"},
274 unsigned int pre_div:1;
279 /* The size in bits of the pll divide multiplied by 10
280 * to allow rounding later */
281 #define FIXED_PLL_SIZE ((1 << 24) * 10)
283 static void pll_factors(struct pll_ *pll_div,
284 unsigned int target, unsigned int source)
286 unsigned long long Kpart;
287 unsigned int K, Ndiv, Nmod;
289 /* There is a fixed divide by 4 in the output path */
292 Ndiv = target / source;
295 pll_div->pre_div = 1;
296 Ndiv = target / source;
298 pll_div->pre_div = 0;
300 if ((Ndiv < 6) || (Ndiv > 12))
302 "WM8974 N value %u outwith recommended range!\n",
306 Nmod = target % source;
307 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
309 do_div(Kpart, source);
311 K = Kpart & 0xFFFFFFFF;
313 /* Check if we need to round */
317 /* Move down to proper range now rounding is done */
323 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
324 int source, unsigned int freq_in, unsigned int freq_out)
326 struct snd_soc_component *component = codec_dai->component;
330 if (freq_in == 0 || freq_out == 0) {
331 /* Clock CODEC directly from MCLK */
332 reg = snd_soc_component_read32(component, WM8974_CLOCK);
333 snd_soc_component_write(component, WM8974_CLOCK, reg & 0x0ff);
336 reg = snd_soc_component_read32(component, WM8974_POWER1);
337 snd_soc_component_write(component, WM8974_POWER1, reg & 0x1df);
341 pll_factors(&pll_div, freq_out, freq_in);
343 snd_soc_component_write(component, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
344 snd_soc_component_write(component, WM8974_PLLK1, pll_div.k >> 18);
345 snd_soc_component_write(component, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
346 snd_soc_component_write(component, WM8974_PLLK3, pll_div.k & 0x1ff);
347 reg = snd_soc_component_read32(component, WM8974_POWER1);
348 snd_soc_component_write(component, WM8974_POWER1, reg | 0x020);
350 /* Run CODEC from PLL instead of MCLK */
351 reg = snd_soc_component_read32(component, WM8974_CLOCK);
352 snd_soc_component_write(component, WM8974_CLOCK, reg | 0x100);
358 * Configure WM8974 clock dividers.
360 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
363 struct snd_soc_component *component = codec_dai->component;
367 case WM8974_OPCLKDIV:
368 reg = snd_soc_component_read32(component, WM8974_GPIO) & 0x1cf;
369 snd_soc_component_write(component, WM8974_GPIO, reg | div);
372 reg = snd_soc_component_read32(component, WM8974_CLOCK) & 0x11f;
373 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
376 reg = snd_soc_component_read32(component, WM8974_CLOCK) & 0x1e3;
377 snd_soc_component_write(component, WM8974_CLOCK, reg | div);
386 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
389 unsigned int ratio = 2 * f_in / f_out;
392 *mclkdiv = WM8974_MCLKDIV_1;
394 } else if (ratio == 3) {
395 *mclkdiv = WM8974_MCLKDIV_1_5;
396 } else if (ratio == 4) {
397 *mclkdiv = WM8974_MCLKDIV_2;
398 } else if (ratio <= 6) {
399 *mclkdiv = WM8974_MCLKDIV_3;
401 } else if (ratio <= 8) {
402 *mclkdiv = WM8974_MCLKDIV_4;
404 } else if (ratio <= 12) {
405 *mclkdiv = WM8974_MCLKDIV_6;
407 } else if (ratio <= 16) {
408 *mclkdiv = WM8974_MCLKDIV_8;
411 *mclkdiv = WM8974_MCLKDIV_12;
415 return f_out * ratio / 2;
418 static int wm8974_update_clocks(struct snd_soc_dai *dai)
420 struct snd_soc_component *component = dai->component;
421 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
423 unsigned int fpll = 0;
427 if (!priv->mclk || !priv->fs)
430 fs256 = 256 * priv->fs;
432 f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
434 if (f != priv->mclk) {
435 /* The PLL performs best around 90MHz */
436 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
439 wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
440 wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
445 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
446 unsigned int freq, int dir)
448 struct snd_soc_component *component = dai->component;
449 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
451 if (dir != SND_SOC_CLOCK_IN)
456 return wm8974_update_clocks(dai);
459 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
462 struct snd_soc_component *component = codec_dai->component;
464 u16 clk = snd_soc_component_read32(component, WM8974_CLOCK) & 0x1fe;
466 /* set master/slave audio interface */
467 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
468 case SND_SOC_DAIFMT_CBM_CFM:
471 case SND_SOC_DAIFMT_CBS_CFS:
477 /* interface format */
478 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
479 case SND_SOC_DAIFMT_I2S:
482 case SND_SOC_DAIFMT_RIGHT_J:
484 case SND_SOC_DAIFMT_LEFT_J:
487 case SND_SOC_DAIFMT_DSP_A:
494 /* clock inversion */
495 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
496 case SND_SOC_DAIFMT_NB_NF:
498 case SND_SOC_DAIFMT_IB_IF:
501 case SND_SOC_DAIFMT_IB_NF:
504 case SND_SOC_DAIFMT_NB_IF:
511 snd_soc_component_write(component, WM8974_IFACE, iface);
512 snd_soc_component_write(component, WM8974_CLOCK, clk);
516 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
517 struct snd_pcm_hw_params *params,
518 struct snd_soc_dai *dai)
520 struct snd_soc_component *component = dai->component;
521 struct wm8974_priv *priv = snd_soc_component_get_drvdata(component);
522 u16 iface = snd_soc_component_read32(component, WM8974_IFACE) & 0x19f;
523 u16 adn = snd_soc_component_read32(component, WM8974_ADD) & 0x1f1;
526 priv->fs = params_rate(params);
527 err = wm8974_update_clocks(dai);
532 switch (params_width(params)) {
546 /* filter coefficient */
547 switch (params_rate(params)) {
568 snd_soc_component_write(component, WM8974_IFACE, iface);
569 snd_soc_component_write(component, WM8974_ADD, adn);
573 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
575 struct snd_soc_component *component = dai->component;
576 u16 mute_reg = snd_soc_component_read32(component, WM8974_DAC) & 0xffbf;
579 snd_soc_component_write(component, WM8974_DAC, mute_reg | 0x40);
581 snd_soc_component_write(component, WM8974_DAC, mute_reg);
585 /* liam need to make this lower power with dapm */
586 static int wm8974_set_bias_level(struct snd_soc_component *component,
587 enum snd_soc_bias_level level)
589 u16 power1 = snd_soc_component_read32(component, WM8974_POWER1) & ~0x3;
592 case SND_SOC_BIAS_ON:
593 case SND_SOC_BIAS_PREPARE:
594 power1 |= 0x1; /* VMID 50k */
595 snd_soc_component_write(component, WM8974_POWER1, power1);
598 case SND_SOC_BIAS_STANDBY:
599 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
601 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
602 regcache_sync(dev_get_regmap(component->dev, NULL));
604 /* Initial cap charge at VMID 5k */
605 snd_soc_component_write(component, WM8974_POWER1, power1 | 0x3);
609 power1 |= 0x2; /* VMID 500k */
610 snd_soc_component_write(component, WM8974_POWER1, power1);
613 case SND_SOC_BIAS_OFF:
614 snd_soc_component_write(component, WM8974_POWER1, 0);
615 snd_soc_component_write(component, WM8974_POWER2, 0);
616 snd_soc_component_write(component, WM8974_POWER3, 0);
623 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
625 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
626 SNDRV_PCM_FMTBIT_S24_LE)
628 static const struct snd_soc_dai_ops wm8974_ops = {
629 .hw_params = wm8974_pcm_hw_params,
630 .digital_mute = wm8974_mute,
631 .set_fmt = wm8974_set_dai_fmt,
632 .set_clkdiv = wm8974_set_dai_clkdiv,
633 .set_pll = wm8974_set_dai_pll,
634 .set_sysclk = wm8974_set_dai_sysclk,
637 static struct snd_soc_dai_driver wm8974_dai = {
638 .name = "wm8974-hifi",
640 .stream_name = "Playback",
642 .channels_max = 2, /* Only 1 channel of data */
643 .rates = WM8974_RATES,
644 .formats = WM8974_FORMATS,},
646 .stream_name = "Capture",
648 .channels_max = 2, /* Only 1 channel of data */
649 .rates = WM8974_RATES,
650 .formats = WM8974_FORMATS,},
652 .symmetric_rates = 1,
655 static const struct regmap_config wm8974_regmap = {
659 .max_register = WM8974_MONOMIX,
660 .reg_defaults = wm8974_reg_defaults,
661 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
662 .cache_type = REGCACHE_FLAT,
665 static int wm8974_probe(struct snd_soc_component *component)
669 ret = wm8974_reset(component);
671 dev_err(component->dev, "Failed to issue reset\n");
678 static const struct snd_soc_component_driver soc_component_dev_wm8974 = {
679 .probe = wm8974_probe,
680 .set_bias_level = wm8974_set_bias_level,
681 .controls = wm8974_snd_controls,
682 .num_controls = ARRAY_SIZE(wm8974_snd_controls),
683 .dapm_widgets = wm8974_dapm_widgets,
684 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
685 .dapm_routes = wm8974_dapm_routes,
686 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
687 .suspend_bias_off = 1,
689 .use_pmdown_time = 1,
691 .non_legacy_dai_naming = 1,
694 static int wm8974_i2c_probe(struct i2c_client *i2c,
695 const struct i2c_device_id *id)
697 struct wm8974_priv *priv;
698 struct regmap *regmap;
701 priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
705 i2c_set_clientdata(i2c, priv);
707 regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
709 return PTR_ERR(regmap);
711 ret = devm_snd_soc_register_component(&i2c->dev,
712 &soc_component_dev_wm8974, &wm8974_dai, 1);
717 static const struct i2c_device_id wm8974_i2c_id[] = {
721 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
723 static const struct of_device_id wm8974_of_match[] = {
724 { .compatible = "wlf,wm8974", },
727 MODULE_DEVICE_TABLE(of, wm8974_of_match);
729 static struct i2c_driver wm8974_i2c_driver = {
732 .of_match_table = wm8974_of_match,
734 .probe = wm8974_i2c_probe,
735 .id_table = wm8974_i2c_id,
738 module_i2c_driver(wm8974_i2c_driver);
740 MODULE_DESCRIPTION("ASoC WM8974 driver");
741 MODULE_AUTHOR("Liam Girdwood");
742 MODULE_LICENSE("GPL");