2 * wm8974.c -- WM8974 ALSA Soc Audio driver
4 * Copyright 2006-2009 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <linux@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/platform_device.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>
31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
32 0x0000, 0x0000, 0x0000, 0x0000,
33 0x0050, 0x0000, 0x0140, 0x0000,
34 0x0000, 0x0000, 0x0000, 0x00ff,
35 0x0000, 0x0000, 0x0100, 0x00ff,
36 0x0000, 0x0000, 0x012c, 0x002c,
37 0x002c, 0x002c, 0x002c, 0x0000,
38 0x0032, 0x0000, 0x0000, 0x0000,
39 0x0000, 0x0000, 0x0000, 0x0000,
40 0x0038, 0x000b, 0x0032, 0x0000,
41 0x0008, 0x000c, 0x0093, 0x00e9,
42 0x0000, 0x0000, 0x0000, 0x0000,
43 0x0003, 0x0010, 0x0000, 0x0000,
44 0x0000, 0x0002, 0x0000, 0x0000,
45 0x0000, 0x0000, 0x0039, 0x0000,
49 #define WM8974_POWER1_BIASEN 0x08
50 #define WM8974_POWER1_BUFIOEN 0x04
53 enum snd_soc_control_type control_type;
56 #define wm8974_reset(c) snd_soc_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 const struct soc_enum wm8974_auxmode =
92 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, 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 Bandwith", 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 Bandwith", 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 Bandwith", 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 Bandwith", 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_MICBIAS("Mic Bias", WM8974_POWER1, 4, 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 audio_map[] = {
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"},
273 static int wm8974_add_widgets(struct snd_soc_codec *codec)
275 struct snd_soc_dapm_context *dapm = &codec->dapm;
277 snd_soc_dapm_new_controls(dapm, wm8974_dapm_widgets,
278 ARRAY_SIZE(wm8974_dapm_widgets));
279 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
285 unsigned int pre_div:1;
290 /* The size in bits of the pll divide multiplied by 10
291 * to allow rounding later */
292 #define FIXED_PLL_SIZE ((1 << 24) * 10)
294 static void pll_factors(struct pll_ *pll_div,
295 unsigned int target, unsigned int source)
297 unsigned long long Kpart;
298 unsigned int K, Ndiv, Nmod;
300 /* There is a fixed divide by 4 in the output path */
303 Ndiv = target / source;
306 pll_div->pre_div = 1;
307 Ndiv = target / source;
309 pll_div->pre_div = 0;
311 if ((Ndiv < 6) || (Ndiv > 12))
313 "WM8974 N value %u outwith recommended range!\n",
317 Nmod = target % source;
318 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
320 do_div(Kpart, source);
322 K = Kpart & 0xFFFFFFFF;
324 /* Check if we need to round */
328 /* Move down to proper range now rounding is done */
334 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
335 int source, unsigned int freq_in, unsigned int freq_out)
337 struct snd_soc_codec *codec = codec_dai->codec;
341 if (freq_in == 0 || freq_out == 0) {
342 /* Clock CODEC directly from MCLK */
343 reg = snd_soc_read(codec, WM8974_CLOCK);
344 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
347 reg = snd_soc_read(codec, WM8974_POWER1);
348 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
352 pll_factors(&pll_div, freq_out, freq_in);
354 snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
355 snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
356 snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
357 snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
358 reg = snd_soc_read(codec, WM8974_POWER1);
359 snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
361 /* Run CODEC from PLL instead of MCLK */
362 reg = snd_soc_read(codec, WM8974_CLOCK);
363 snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
369 * Configure WM8974 clock dividers.
371 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
374 struct snd_soc_codec *codec = codec_dai->codec;
378 case WM8974_OPCLKDIV:
379 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
380 snd_soc_write(codec, WM8974_GPIO, reg | div);
383 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
384 snd_soc_write(codec, WM8974_CLOCK, reg | div);
387 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
388 snd_soc_write(codec, WM8974_CLOCK, reg | div);
397 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
400 struct snd_soc_codec *codec = codec_dai->codec;
402 u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
404 /* set master/slave audio interface */
405 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
406 case SND_SOC_DAIFMT_CBM_CFM:
409 case SND_SOC_DAIFMT_CBS_CFS:
415 /* interface format */
416 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
417 case SND_SOC_DAIFMT_I2S:
420 case SND_SOC_DAIFMT_RIGHT_J:
422 case SND_SOC_DAIFMT_LEFT_J:
425 case SND_SOC_DAIFMT_DSP_A:
432 /* clock inversion */
433 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
434 case SND_SOC_DAIFMT_NB_NF:
436 case SND_SOC_DAIFMT_IB_IF:
439 case SND_SOC_DAIFMT_IB_NF:
442 case SND_SOC_DAIFMT_NB_IF:
449 snd_soc_write(codec, WM8974_IFACE, iface);
450 snd_soc_write(codec, WM8974_CLOCK, clk);
454 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
455 struct snd_pcm_hw_params *params,
456 struct snd_soc_dai *dai)
458 struct snd_soc_codec *codec = dai->codec;
459 u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
460 u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
463 switch (params_format(params)) {
464 case SNDRV_PCM_FORMAT_S16_LE:
466 case SNDRV_PCM_FORMAT_S20_3LE:
469 case SNDRV_PCM_FORMAT_S24_LE:
472 case SNDRV_PCM_FORMAT_S32_LE:
477 /* filter coefficient */
478 switch (params_rate(params)) {
499 snd_soc_write(codec, WM8974_IFACE, iface);
500 snd_soc_write(codec, WM8974_ADD, adn);
504 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
506 struct snd_soc_codec *codec = dai->codec;
507 u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
510 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
512 snd_soc_write(codec, WM8974_DAC, mute_reg);
516 /* liam need to make this lower power with dapm */
517 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
518 enum snd_soc_bias_level level)
520 u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
523 case SND_SOC_BIAS_ON:
524 case SND_SOC_BIAS_PREPARE:
525 power1 |= 0x1; /* VMID 50k */
526 snd_soc_write(codec, WM8974_POWER1, power1);
529 case SND_SOC_BIAS_STANDBY:
530 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
532 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
533 /* Initial cap charge at VMID 5k */
534 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
538 power1 |= 0x2; /* VMID 500k */
539 snd_soc_write(codec, WM8974_POWER1, power1);
542 case SND_SOC_BIAS_OFF:
543 snd_soc_write(codec, WM8974_POWER1, 0);
544 snd_soc_write(codec, WM8974_POWER2, 0);
545 snd_soc_write(codec, WM8974_POWER3, 0);
549 codec->dapm.bias_level = level;
553 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
555 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
556 SNDRV_PCM_FMTBIT_S24_LE)
558 static struct snd_soc_dai_ops wm8974_ops = {
559 .hw_params = wm8974_pcm_hw_params,
560 .digital_mute = wm8974_mute,
561 .set_fmt = wm8974_set_dai_fmt,
562 .set_clkdiv = wm8974_set_dai_clkdiv,
563 .set_pll = wm8974_set_dai_pll,
566 static struct snd_soc_dai_driver wm8974_dai = {
567 .name = "wm8974-hifi",
569 .stream_name = "Playback",
571 .channels_max = 2, /* Only 1 channel of data */
572 .rates = WM8974_RATES,
573 .formats = WM8974_FORMATS,},
575 .stream_name = "Capture",
577 .channels_max = 2, /* Only 1 channel of data */
578 .rates = WM8974_RATES,
579 .formats = WM8974_FORMATS,},
581 .symmetric_rates = 1,
584 static int wm8974_suspend(struct snd_soc_codec *codec, pm_message_t state)
586 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
590 static int wm8974_resume(struct snd_soc_codec *codec)
594 u16 *cache = codec->reg_cache;
596 /* Sync reg_cache with the hardware */
597 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
598 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
599 data[1] = cache[i] & 0x00ff;
600 codec->hw_write(codec->control_data, data, 2);
602 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
607 static int wm8974_probe(struct snd_soc_codec *codec)
611 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
613 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
617 ret = wm8974_reset(codec);
619 dev_err(codec->dev, "Failed to issue reset\n");
623 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
624 snd_soc_add_controls(codec, wm8974_snd_controls,
625 ARRAY_SIZE(wm8974_snd_controls));
626 wm8974_add_widgets(codec);
631 /* power down chip */
632 static int wm8974_remove(struct snd_soc_codec *codec)
634 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
638 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
639 .probe = wm8974_probe,
640 .remove = wm8974_remove,
641 .suspend = wm8974_suspend,
642 .resume = wm8974_resume,
643 .set_bias_level = wm8974_set_bias_level,
644 .reg_cache_size = ARRAY_SIZE(wm8974_reg),
645 .reg_word_size = sizeof(u16),
646 .reg_cache_default = wm8974_reg,
649 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
650 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
651 const struct i2c_device_id *id)
653 struct wm8974_priv *wm8974;
656 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
660 i2c_set_clientdata(i2c, wm8974);
662 ret = snd_soc_register_codec(&i2c->dev,
663 &soc_codec_dev_wm8974, &wm8974_dai, 1);
669 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
671 snd_soc_unregister_codec(&client->dev);
672 kfree(i2c_get_clientdata(client));
676 static const struct i2c_device_id wm8974_i2c_id[] = {
680 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
682 static struct i2c_driver wm8974_i2c_driver = {
684 .name = "wm8974-codec",
685 .owner = THIS_MODULE,
687 .probe = wm8974_i2c_probe,
688 .remove = __devexit_p(wm8974_i2c_remove),
689 .id_table = wm8974_i2c_id,
693 static int __init wm8974_modinit(void)
696 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
697 ret = i2c_add_driver(&wm8974_i2c_driver);
699 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n",
705 module_init(wm8974_modinit);
707 static void __exit wm8974_exit(void)
709 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
710 i2c_del_driver(&wm8974_i2c_driver);
713 module_exit(wm8974_exit);
715 MODULE_DESCRIPTION("ASoC WM8974 driver");
716 MODULE_AUTHOR("Liam Girdwood");
717 MODULE_LICENSE("GPL");