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/moduleparam.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
19 #include <linux/i2c.h>
20 #include <linux/regmap.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>
36 static const struct reg_default wm8974_reg_defaults[] = {
37 { 0, 0x0000 }, { 1, 0x0000 }, { 2, 0x0000 }, { 3, 0x0000 },
38 { 4, 0x0050 }, { 5, 0x0000 }, { 6, 0x0140 }, { 7, 0x0000 },
39 { 8, 0x0000 }, { 9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
40 { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
41 { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
42 { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
43 { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
44 { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
45 { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
46 { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
47 { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
48 { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
49 { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
50 { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
54 #define WM8974_POWER1_BIASEN 0x08
55 #define WM8974_POWER1_BUFIOEN 0x04
57 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
59 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
60 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
61 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
62 static const char *wm8974_bw[] = {"Narrow", "Wide" };
63 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
64 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
65 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
66 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
67 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
68 static const char *wm8974_alc[] = {"ALC", "Limiter" };
70 static const struct soc_enum wm8974_enum[] = {
71 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
72 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
73 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
74 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
76 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
77 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
78 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
79 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
81 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
82 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
83 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
84 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
86 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
87 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
90 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
92 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
93 WM8974_INPUT, 3, wm8974_auxmode_text);
95 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
96 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
97 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
98 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
100 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
102 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
104 SOC_ENUM("DAC Companding", wm8974_enum[1]),
105 SOC_ENUM("ADC Companding", wm8974_enum[0]),
107 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
108 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
110 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
112 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
113 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
114 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
116 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
118 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
119 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
120 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
122 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
123 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
124 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
126 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
127 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
128 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
130 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
131 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
132 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
134 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
135 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
136 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
138 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
139 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
140 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
142 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
143 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
145 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
146 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
147 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
149 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
150 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
151 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
153 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
154 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
155 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
157 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
160 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
161 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
163 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
164 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
165 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
167 SOC_ENUM("Aux Mode", wm8974_auxmode),
169 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
170 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
172 /* DAC / ADC oversampling */
173 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
174 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
177 /* Speaker Output Mixer */
178 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
179 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
180 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
181 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
184 /* Mono Output Mixer */
185 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
186 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
187 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
188 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
192 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
197 static const struct snd_kcontrol_new wm8974_inpga[] = {
198 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
199 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
200 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
203 /* AUX Input boost vol */
204 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
205 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
207 /* Mic Input boost vol */
208 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
209 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
211 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
212 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
213 &wm8974_speaker_mixer_controls[0],
214 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
215 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
216 &wm8974_mono_mixer_controls[0],
217 ARRAY_SIZE(wm8974_mono_mixer_controls)),
218 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
219 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
220 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
221 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
222 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
223 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
225 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
226 ARRAY_SIZE(wm8974_inpga)),
227 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
228 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
230 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
232 SND_SOC_DAPM_INPUT("MICN"),
233 SND_SOC_DAPM_INPUT("MICP"),
234 SND_SOC_DAPM_INPUT("AUX"),
235 SND_SOC_DAPM_OUTPUT("MONOOUT"),
236 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
237 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
240 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
241 /* Mono output mixer */
242 {"Mono Mixer", "PCM Playback Switch", "DAC"},
243 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
244 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
246 /* Speaker output mixer */
247 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
248 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
249 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
252 {"Mono Out", NULL, "Mono Mixer"},
253 {"MONOOUT", NULL, "Mono Out"},
254 {"SpkN Out", NULL, "Speaker Mixer"},
255 {"SpkP Out", NULL, "Speaker Mixer"},
256 {"SPKOUTN", NULL, "SpkN Out"},
257 {"SPKOUTP", NULL, "SpkP Out"},
260 {"ADC", NULL, "Boost Mixer"},
261 {"Boost Mixer", "Aux Switch", "Aux Input"},
262 {"Boost Mixer", NULL, "Input PGA"},
263 {"Boost Mixer", NULL, "MICP"},
266 {"Input PGA", "Aux Switch", "Aux Input"},
267 {"Input PGA", "MicN Switch", "MICN"},
268 {"Input PGA", "MicP Switch", "MICP"},
271 {"Aux Input", NULL, "AUX"},
275 unsigned int pre_div:1;
280 /* The size in bits of the pll divide multiplied by 10
281 * to allow rounding later */
282 #define FIXED_PLL_SIZE ((1 << 24) * 10)
284 static void pll_factors(struct pll_ *pll_div,
285 unsigned int target, unsigned int source)
287 unsigned long long Kpart;
288 unsigned int K, Ndiv, Nmod;
290 /* There is a fixed divide by 4 in the output path */
293 Ndiv = target / source;
296 pll_div->pre_div = 1;
297 Ndiv = target / source;
299 pll_div->pre_div = 0;
301 if ((Ndiv < 6) || (Ndiv > 12))
303 "WM8974 N value %u outwith recommended range!\n",
307 Nmod = target % source;
308 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
310 do_div(Kpart, source);
312 K = Kpart & 0xFFFFFFFF;
314 /* Check if we need to round */
318 /* Move down to proper range now rounding is done */
324 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
325 int source, unsigned int freq_in, unsigned int freq_out)
327 struct snd_soc_codec *codec = codec_dai->codec;
331 if (freq_in == 0 || freq_out == 0) {
332 /* Clock CODEC directly from MCLK */
333 reg = snd_soc_read(codec, WM8974_CLOCK);
334 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
337 reg = snd_soc_read(codec, WM8974_POWER1);
338 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
342 pll_factors(&pll_div, freq_out, freq_in);
344 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
345 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
346 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
347 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
348 reg = snd_soc_read(codec, WM8974_POWER1);
349 snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
351 /* Run CODEC from PLL instead of MCLK */
352 reg = snd_soc_read(codec, WM8974_CLOCK);
353 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
359 * Configure WM8974 clock dividers.
361 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
364 struct snd_soc_codec *codec = codec_dai->codec;
368 case WM8974_OPCLKDIV:
369 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
370 snd_soc_write(codec, WM8974_GPIO, reg | div);
373 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
374 snd_soc_write(codec, WM8974_CLOCK, reg | div);
377 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
378 snd_soc_write(codec, WM8974_CLOCK, reg | div);
387 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
390 unsigned int ratio = 2 * f_in / f_out;
393 *mclkdiv = WM8974_MCLKDIV_1;
395 } else if (ratio == 3) {
396 *mclkdiv = WM8974_MCLKDIV_1_5;
397 } else if (ratio == 4) {
398 *mclkdiv = WM8974_MCLKDIV_2;
399 } else if (ratio <= 6) {
400 *mclkdiv = WM8974_MCLKDIV_3;
402 } else if (ratio <= 8) {
403 *mclkdiv = WM8974_MCLKDIV_4;
405 } else if (ratio <= 12) {
406 *mclkdiv = WM8974_MCLKDIV_6;
408 } else if (ratio <= 16) {
409 *mclkdiv = WM8974_MCLKDIV_8;
412 *mclkdiv = WM8974_MCLKDIV_12;
416 return f_out * ratio / 2;
419 static int wm8974_update_clocks(struct snd_soc_dai *dai)
421 struct snd_soc_codec *codec = dai->codec;
422 struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
424 unsigned int fpll = 0;
428 if (!priv->mclk || !priv->fs)
431 fs256 = 256 * priv->fs;
433 f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
435 if (f != priv->mclk) {
436 /* The PLL performs best around 90MHz */
437 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
440 wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
441 wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
446 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
447 unsigned int freq, int dir)
449 struct snd_soc_codec *codec = dai->codec;
450 struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
452 if (dir != SND_SOC_CLOCK_IN)
457 return wm8974_update_clocks(dai);
460 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
463 struct snd_soc_codec *codec = codec_dai->codec;
465 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
467 /* set master/slave audio interface */
468 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
469 case SND_SOC_DAIFMT_CBM_CFM:
472 case SND_SOC_DAIFMT_CBS_CFS:
478 /* interface format */
479 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
480 case SND_SOC_DAIFMT_I2S:
483 case SND_SOC_DAIFMT_RIGHT_J:
485 case SND_SOC_DAIFMT_LEFT_J:
488 case SND_SOC_DAIFMT_DSP_A:
495 /* clock inversion */
496 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
497 case SND_SOC_DAIFMT_NB_NF:
499 case SND_SOC_DAIFMT_IB_IF:
502 case SND_SOC_DAIFMT_IB_NF:
505 case SND_SOC_DAIFMT_NB_IF:
512 snd_soc_write(codec, WM8974_IFACE, iface);
513 snd_soc_write(codec, WM8974_CLOCK, clk);
517 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
518 struct snd_pcm_hw_params *params,
519 struct snd_soc_dai *dai)
521 struct snd_soc_codec *codec = dai->codec;
522 struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
523 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
524 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
527 priv->fs = params_rate(params);
528 err = wm8974_update_clocks(dai);
533 switch (params_width(params)) {
547 /* filter coefficient */
548 switch (params_rate(params)) {
569 snd_soc_write(codec, WM8974_IFACE, iface);
570 snd_soc_write(codec, WM8974_ADD, adn);
574 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
576 struct snd_soc_codec *codec = dai->codec;
577 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
580 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
582 snd_soc_write(codec, WM8974_DAC, mute_reg);
586 /* liam need to make this lower power with dapm */
587 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
588 enum snd_soc_bias_level level)
590 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
593 case SND_SOC_BIAS_ON:
594 case SND_SOC_BIAS_PREPARE:
595 power1 |= 0x1; /* VMID 50k */
596 snd_soc_write(codec, WM8974_POWER1, power1);
599 case SND_SOC_BIAS_STANDBY:
600 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
602 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
603 regcache_sync(dev_get_regmap(codec->dev, NULL));
605 /* Initial cap charge at VMID 5k */
606 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
610 power1 |= 0x2; /* VMID 500k */
611 snd_soc_write(codec, WM8974_POWER1, power1);
614 case SND_SOC_BIAS_OFF:
615 snd_soc_write(codec, WM8974_POWER1, 0);
616 snd_soc_write(codec, WM8974_POWER2, 0);
617 snd_soc_write(codec, WM8974_POWER3, 0);
624 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
626 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
627 SNDRV_PCM_FMTBIT_S24_LE)
629 static const struct snd_soc_dai_ops wm8974_ops = {
630 .hw_params = wm8974_pcm_hw_params,
631 .digital_mute = wm8974_mute,
632 .set_fmt = wm8974_set_dai_fmt,
633 .set_clkdiv = wm8974_set_dai_clkdiv,
634 .set_pll = wm8974_set_dai_pll,
635 .set_sysclk = wm8974_set_dai_sysclk,
638 static struct snd_soc_dai_driver wm8974_dai = {
639 .name = "wm8974-hifi",
641 .stream_name = "Playback",
643 .channels_max = 2, /* Only 1 channel of data */
644 .rates = WM8974_RATES,
645 .formats = WM8974_FORMATS,},
647 .stream_name = "Capture",
649 .channels_max = 2, /* Only 1 channel of data */
650 .rates = WM8974_RATES,
651 .formats = WM8974_FORMATS,},
653 .symmetric_rates = 1,
656 static const struct regmap_config wm8974_regmap = {
660 .max_register = WM8974_MONOMIX,
661 .reg_defaults = wm8974_reg_defaults,
662 .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
663 .cache_type = REGCACHE_FLAT,
666 static int wm8974_probe(struct snd_soc_codec *codec)
670 ret = wm8974_reset(codec);
672 dev_err(codec->dev, "Failed to issue reset\n");
679 static const struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
680 .probe = wm8974_probe,
681 .set_bias_level = wm8974_set_bias_level,
682 .suspend_bias_off = true,
684 .component_driver = {
685 .controls = wm8974_snd_controls,
686 .num_controls = ARRAY_SIZE(wm8974_snd_controls),
687 .dapm_widgets = wm8974_dapm_widgets,
688 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
689 .dapm_routes = wm8974_dapm_routes,
690 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
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 = snd_soc_register_codec(&i2c->dev,
712 &soc_codec_dev_wm8974, &wm8974_dai, 1);
717 static int wm8974_i2c_remove(struct i2c_client *client)
719 snd_soc_unregister_codec(&client->dev);
724 static const struct i2c_device_id wm8974_i2c_id[] = {
728 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
730 static const struct of_device_id wm8974_of_match[] = {
731 { .compatible = "wlf,wm8974", },
734 MODULE_DEVICE_TABLE(of, wm8974_of_match);
736 static struct i2c_driver wm8974_i2c_driver = {
739 .of_match_table = wm8974_of_match,
741 .probe = wm8974_i2c_probe,
742 .remove = wm8974_i2c_remove,
743 .id_table = wm8974_i2c_id,
746 module_i2c_driver(wm8974_i2c_driver);
748 MODULE_DESCRIPTION("ASoC WM8974 driver");
749 MODULE_AUTHOR("Liam Girdwood");
750 MODULE_LICENSE("GPL");