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/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>
30 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
31 0x0000, 0x0000, 0x0000, 0x0000,
32 0x0050, 0x0000, 0x0140, 0x0000,
33 0x0000, 0x0000, 0x0000, 0x00ff,
34 0x0000, 0x0000, 0x0100, 0x00ff,
35 0x0000, 0x0000, 0x012c, 0x002c,
36 0x002c, 0x002c, 0x002c, 0x0000,
37 0x0032, 0x0000, 0x0000, 0x0000,
38 0x0000, 0x0000, 0x0000, 0x0000,
39 0x0038, 0x000b, 0x0032, 0x0000,
40 0x0008, 0x000c, 0x0093, 0x00e9,
41 0x0000, 0x0000, 0x0000, 0x0000,
42 0x0003, 0x0010, 0x0000, 0x0000,
43 0x0000, 0x0002, 0x0000, 0x0000,
44 0x0000, 0x0000, 0x0039, 0x0000,
48 #define WM8974_POWER1_BIASEN 0x08
49 #define WM8974_POWER1_BUFIOEN 0x04
51 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
53 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
54 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
55 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
56 static const char *wm8974_bw[] = {"Narrow", "Wide" };
57 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
58 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
59 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
60 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
61 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
62 static const char *wm8974_alc[] = {"ALC", "Limiter" };
64 static const struct soc_enum wm8974_enum[] = {
65 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
66 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
67 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
68 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
70 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
71 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
72 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
73 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
75 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
76 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
77 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
78 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
80 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
81 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
84 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
86 static const struct soc_enum wm8974_auxmode =
87 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text);
89 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
90 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
91 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
92 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
94 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
96 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
98 SOC_ENUM("DAC Companding", wm8974_enum[1]),
99 SOC_ENUM("ADC Companding", wm8974_enum[0]),
101 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
102 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
104 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
106 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
107 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
108 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
110 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
112 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
113 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
114 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
116 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
117 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
118 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
120 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
121 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
122 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
124 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
125 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
126 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
128 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
129 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
130 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
132 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
133 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
134 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
136 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
137 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
139 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
140 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
141 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
143 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
144 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
145 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
147 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
148 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
149 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
151 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
152 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
154 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
155 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
157 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
158 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
159 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
161 SOC_ENUM("Aux Mode", wm8974_auxmode),
163 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
164 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
166 /* DAC / ADC oversampling */
167 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
168 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
171 /* Speaker Output Mixer */
172 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
173 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
174 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
175 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
178 /* Mono Output Mixer */
179 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
186 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
187 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
191 static const struct snd_kcontrol_new wm8974_inpga[] = {
192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
193 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
194 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
197 /* AUX Input boost vol */
198 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
199 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
201 /* Mic Input boost vol */
202 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
203 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
205 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
206 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
207 &wm8974_speaker_mixer_controls[0],
208 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
209 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
210 &wm8974_mono_mixer_controls[0],
211 ARRAY_SIZE(wm8974_mono_mixer_controls)),
212 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
213 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
214 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
215 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
216 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
217 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
219 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
220 ARRAY_SIZE(wm8974_inpga)),
221 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
222 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
224 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
226 SND_SOC_DAPM_INPUT("MICN"),
227 SND_SOC_DAPM_INPUT("MICP"),
228 SND_SOC_DAPM_INPUT("AUX"),
229 SND_SOC_DAPM_OUTPUT("MONOOUT"),
230 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
231 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
234 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
235 /* Mono output mixer */
236 {"Mono Mixer", "PCM Playback Switch", "DAC"},
237 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
238 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
240 /* Speaker output mixer */
241 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
242 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
243 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
246 {"Mono Out", NULL, "Mono Mixer"},
247 {"MONOOUT", NULL, "Mono Out"},
248 {"SpkN Out", NULL, "Speaker Mixer"},
249 {"SpkP Out", NULL, "Speaker Mixer"},
250 {"SPKOUTN", NULL, "SpkN Out"},
251 {"SPKOUTP", NULL, "SpkP Out"},
254 {"ADC", NULL, "Boost Mixer"},
255 {"Boost Mixer", "Aux Switch", "Aux Input"},
256 {"Boost Mixer", NULL, "Input PGA"},
257 {"Boost Mixer", NULL, "MICP"},
260 {"Input PGA", "Aux Switch", "Aux Input"},
261 {"Input PGA", "MicN Switch", "MICN"},
262 {"Input PGA", "MicP Switch", "MICP"},
265 {"Aux Input", NULL, "AUX"},
269 unsigned int pre_div:1;
274 /* The size in bits of the pll divide multiplied by 10
275 * to allow rounding later */
276 #define FIXED_PLL_SIZE ((1 << 24) * 10)
278 static void pll_factors(struct pll_ *pll_div,
279 unsigned int target, unsigned int source)
281 unsigned long long Kpart;
282 unsigned int K, Ndiv, Nmod;
284 /* There is a fixed divide by 4 in the output path */
287 Ndiv = target / source;
290 pll_div->pre_div = 1;
291 Ndiv = target / source;
293 pll_div->pre_div = 0;
295 if ((Ndiv < 6) || (Ndiv > 12))
297 "WM8974 N value %u outwith recommended range!\n",
301 Nmod = target % source;
302 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
304 do_div(Kpart, source);
306 K = Kpart & 0xFFFFFFFF;
308 /* Check if we need to round */
312 /* Move down to proper range now rounding is done */
318 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
319 int source, unsigned int freq_in, unsigned int freq_out)
321 struct snd_soc_codec *codec = codec_dai->codec;
325 if (freq_in == 0 || freq_out == 0) {
326 /* Clock CODEC directly from MCLK */
327 reg = snd_soc_read(codec, WM8974_CLOCK);
328 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
331 reg = snd_soc_read(codec, WM8974_POWER1);
332 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
336 pll_factors(&pll_div, freq_out, freq_in);
338 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
339 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
340 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
341 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
342 reg = snd_soc_read(codec, WM8974_POWER1);
343 snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
345 /* Run CODEC from PLL instead of MCLK */
346 reg = snd_soc_read(codec, WM8974_CLOCK);
347 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
353 * Configure WM8974 clock dividers.
355 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
358 struct snd_soc_codec *codec = codec_dai->codec;
362 case WM8974_OPCLKDIV:
363 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
364 snd_soc_write(codec, WM8974_GPIO, reg | div);
367 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
368 snd_soc_write(codec, WM8974_CLOCK, reg | div);
371 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
372 snd_soc_write(codec, WM8974_CLOCK, reg | div);
381 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
384 struct snd_soc_codec *codec = codec_dai->codec;
386 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
388 /* set master/slave audio interface */
389 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
390 case SND_SOC_DAIFMT_CBM_CFM:
393 case SND_SOC_DAIFMT_CBS_CFS:
399 /* interface format */
400 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
401 case SND_SOC_DAIFMT_I2S:
404 case SND_SOC_DAIFMT_RIGHT_J:
406 case SND_SOC_DAIFMT_LEFT_J:
409 case SND_SOC_DAIFMT_DSP_A:
416 /* clock inversion */
417 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
418 case SND_SOC_DAIFMT_NB_NF:
420 case SND_SOC_DAIFMT_IB_IF:
423 case SND_SOC_DAIFMT_IB_NF:
426 case SND_SOC_DAIFMT_NB_IF:
433 snd_soc_write(codec, WM8974_IFACE, iface);
434 snd_soc_write(codec, WM8974_CLOCK, clk);
438 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
439 struct snd_pcm_hw_params *params,
440 struct snd_soc_dai *dai)
442 struct snd_soc_codec *codec = dai->codec;
443 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
444 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
447 switch (params_format(params)) {
448 case SNDRV_PCM_FORMAT_S16_LE:
450 case SNDRV_PCM_FORMAT_S20_3LE:
453 case SNDRV_PCM_FORMAT_S24_LE:
456 case SNDRV_PCM_FORMAT_S32_LE:
461 /* filter coefficient */
462 switch (params_rate(params)) {
483 snd_soc_write(codec, WM8974_IFACE, iface);
484 snd_soc_write(codec, WM8974_ADD, adn);
488 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
490 struct snd_soc_codec *codec = dai->codec;
491 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
494 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
496 snd_soc_write(codec, WM8974_DAC, mute_reg);
500 /* liam need to make this lower power with dapm */
501 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
502 enum snd_soc_bias_level level)
504 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
507 case SND_SOC_BIAS_ON:
508 case SND_SOC_BIAS_PREPARE:
509 power1 |= 0x1; /* VMID 50k */
510 snd_soc_write(codec, WM8974_POWER1, power1);
513 case SND_SOC_BIAS_STANDBY:
514 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
516 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
517 snd_soc_cache_sync(codec);
519 /* Initial cap charge at VMID 5k */
520 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
524 power1 |= 0x2; /* VMID 500k */
525 snd_soc_write(codec, WM8974_POWER1, power1);
528 case SND_SOC_BIAS_OFF:
529 snd_soc_write(codec, WM8974_POWER1, 0);
530 snd_soc_write(codec, WM8974_POWER2, 0);
531 snd_soc_write(codec, WM8974_POWER3, 0);
535 codec->dapm.bias_level = level;
539 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
541 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
542 SNDRV_PCM_FMTBIT_S24_LE)
544 static const struct snd_soc_dai_ops wm8974_ops = {
545 .hw_params = wm8974_pcm_hw_params,
546 .digital_mute = wm8974_mute,
547 .set_fmt = wm8974_set_dai_fmt,
548 .set_clkdiv = wm8974_set_dai_clkdiv,
549 .set_pll = wm8974_set_dai_pll,
552 static struct snd_soc_dai_driver wm8974_dai = {
553 .name = "wm8974-hifi",
555 .stream_name = "Playback",
557 .channels_max = 2, /* Only 1 channel of data */
558 .rates = WM8974_RATES,
559 .formats = WM8974_FORMATS,},
561 .stream_name = "Capture",
563 .channels_max = 2, /* Only 1 channel of data */
564 .rates = WM8974_RATES,
565 .formats = WM8974_FORMATS,},
567 .symmetric_rates = 1,
570 static int wm8974_suspend(struct snd_soc_codec *codec)
572 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
576 static int wm8974_resume(struct snd_soc_codec *codec)
578 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
582 static int wm8974_probe(struct snd_soc_codec *codec)
586 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
588 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
592 ret = wm8974_reset(codec);
594 dev_err(codec->dev, "Failed to issue reset\n");
598 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
603 /* power down chip */
604 static int wm8974_remove(struct snd_soc_codec *codec)
606 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
610 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
611 .probe = wm8974_probe,
612 .remove = wm8974_remove,
613 .suspend = wm8974_suspend,
614 .resume = wm8974_resume,
615 .set_bias_level = wm8974_set_bias_level,
616 .reg_cache_size = ARRAY_SIZE(wm8974_reg),
617 .reg_word_size = sizeof(u16),
618 .reg_cache_default = wm8974_reg,
620 .controls = wm8974_snd_controls,
621 .num_controls = ARRAY_SIZE(wm8974_snd_controls),
622 .dapm_widgets = wm8974_dapm_widgets,
623 .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
624 .dapm_routes = wm8974_dapm_routes,
625 .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
628 static int wm8974_i2c_probe(struct i2c_client *i2c,
629 const struct i2c_device_id *id)
633 ret = snd_soc_register_codec(&i2c->dev,
634 &soc_codec_dev_wm8974, &wm8974_dai, 1);
639 static int wm8974_i2c_remove(struct i2c_client *client)
641 snd_soc_unregister_codec(&client->dev);
646 static const struct i2c_device_id wm8974_i2c_id[] = {
650 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
652 static struct i2c_driver wm8974_i2c_driver = {
655 .owner = THIS_MODULE,
657 .probe = wm8974_i2c_probe,
658 .remove = wm8974_i2c_remove,
659 .id_table = wm8974_i2c_id,
662 module_i2c_driver(wm8974_i2c_driver);
664 MODULE_DESCRIPTION("ASoC WM8974 driver");
665 MODULE_AUTHOR("Liam Girdwood");
666 MODULE_LICENSE("GPL");