2 * wm8974.c -- WM8974 ALSA Soc Audio driver
4 * Copyright 2006 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/version.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.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/soc-dapm.h>
27 #include <sound/initval.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 0x10
53 struct snd_soc_codec codec;
54 u16 reg_cache[WM8974_CACHEREGNUM];
57 static struct snd_soc_codec *wm8974_codec;
60 * read wm8974 register cache
62 static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
65 u16 *cache = codec->reg_cache;
66 if (reg == WM8974_RESET)
68 if (reg >= WM8974_CACHEREGNUM)
74 * write wm8974 register cache
76 static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
77 u16 reg, unsigned int value)
79 u16 *cache = codec->reg_cache;
80 if (reg >= WM8974_CACHEREGNUM)
86 * write to the WM8974 register space
88 static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
94 * D15..D9 WM8974 register offset
95 * D8...D0 register data
97 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
98 data[1] = value & 0x00ff;
100 wm8974_write_reg_cache(codec, reg, value);
101 if (codec->hw_write(codec->control_data, data, 2) == 2)
107 #define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
109 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
110 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
111 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
112 static const char *wm8974_bw[] = {"Narrow", "Wide" };
113 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
114 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
115 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
116 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
117 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
118 static const char *wm8974_alc[] = {"ALC", "Limiter" };
120 static const struct soc_enum wm8974_enum[] = {
121 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
122 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
123 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
124 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
126 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
127 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
128 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
129 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
131 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
132 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
133 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
134 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
136 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
137 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
140 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
142 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
144 SOC_ENUM("DAC Companding", wm8974_enum[1]),
145 SOC_ENUM("ADC Companding", wm8974_enum[0]),
147 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
148 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
150 SOC_SINGLE("PCM Volume", WM8974_DACVOL, 0, 127, 0),
152 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
153 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
154 SOC_SINGLE("ADC Inversion Switch", WM8974_COMP, 0, 1, 0),
156 SOC_SINGLE("Capture Volume", WM8974_ADCVOL, 0, 127, 0),
158 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
159 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
160 SOC_SINGLE("EQ1 Volume", WM8974_EQ1, 0, 31, 1),
162 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
163 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
164 SOC_SINGLE("EQ2 Volume", WM8974_EQ2, 0, 31, 1),
166 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
167 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
168 SOC_SINGLE("EQ3 Volume", WM8974_EQ3, 0, 31, 1),
170 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
171 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
172 SOC_SINGLE("EQ4 Volume", WM8974_EQ4, 0, 31, 1),
174 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
175 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
176 SOC_SINGLE("EQ5 Volume", WM8974_EQ5, 0, 31, 1),
178 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
179 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
180 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
182 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
183 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
185 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
186 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
187 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
189 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
190 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
191 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
193 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
194 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
195 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
197 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
198 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
200 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
201 SOC_SINGLE("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0),
203 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
204 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
205 SOC_SINGLE("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0),
207 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
208 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 0),
211 /* Speaker Output Mixer */
212 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
213 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
214 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
215 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
218 /* Mono Output Mixer */
219 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
220 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
221 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
222 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 1),
225 /* AUX Input boost vol */
226 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
227 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
229 /* Mic Input boost vol */
230 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
231 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
233 /* Capture boost switch */
234 static const struct snd_kcontrol_new wm8974_capture_boost_controls =
235 SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA, 6, 1, 0);
238 static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls =
239 SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA, 2, 1, 0);
241 /* Mic P In to PGA */
242 static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls =
243 SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA, 0, 1, 0);
245 /* Mic N In to PGA */
246 static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls =
247 SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA, 1, 1, 0);
249 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
250 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
251 &wm8974_speaker_mixer_controls[0],
252 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
253 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
254 &wm8974_mono_mixer_controls[0],
255 ARRAY_SIZE(wm8974_mono_mixer_controls)),
256 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
257 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER3, 0, 0),
258 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
259 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
260 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
261 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
262 SND_SOC_DAPM_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0),
264 SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0,
265 &wm8974_aux_boost_controls, 1),
266 SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0,
267 &wm8974_mic_boost_controls, 1),
268 SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0,
269 &wm8974_capture_boost_controls),
271 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0),
273 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
275 SND_SOC_DAPM_INPUT("MICN"),
276 SND_SOC_DAPM_INPUT("MICP"),
277 SND_SOC_DAPM_INPUT("AUX"),
278 SND_SOC_DAPM_OUTPUT("MONOOUT"),
279 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
280 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
283 static const struct snd_soc_dapm_route audio_map[] = {
284 /* Mono output mixer */
285 {"Mono Mixer", "PCM Playback Switch", "DAC"},
286 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
287 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
289 /* Speaker output mixer */
290 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
291 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
292 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
295 {"Mono Out", NULL, "Mono Mixer"},
296 {"MONOOUT", NULL, "Mono Out"},
297 {"SpkN Out", NULL, "Speaker Mixer"},
298 {"SpkP Out", NULL, "Speaker Mixer"},
299 {"SPKOUTN", NULL, "SpkN Out"},
300 {"SPKOUTP", NULL, "SpkP Out"},
303 {"Boost Mixer", NULL, "ADC"},
304 {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"},
305 {"Aux Boost", "Aux Volume", "Boost Mixer"},
306 {"Capture Boost", "Capture Switch", "Boost Mixer"},
307 {"Mic Boost", "Mic Volume", "Boost Mixer"},
310 {"MICP", NULL, "Mic Boost"},
311 {"MICN", NULL, "Mic PGA"},
312 {"Mic PGA", NULL, "Capture Boost"},
313 {"AUX", NULL, "Aux Input"},
316 static int wm8974_add_widgets(struct snd_soc_codec *codec)
318 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
319 ARRAY_SIZE(wm8974_dapm_widgets));
321 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
323 snd_soc_dapm_new_widgets(codec);
328 unsigned int in_hz, out_hz;
329 unsigned int pre:4; /* prescale - 1 */
334 static struct pll_ pll[] = {
335 { 12000000, 11289600, 0, 7, 0x86c220 },
336 { 12000000, 12288000, 0, 8, 0x3126e8 },
337 { 13000000, 11289600, 0, 6, 0xf28bd4 },
338 { 13000000, 12288000, 0, 7, 0x8fd525 },
339 { 12288000, 11289600, 0, 7, 0x59999a },
340 { 11289600, 12288000, 0, 8, 0x80dee9 },
341 { 25000000, 11289600, 1, 7, 0x39B024 },
342 { 25000000, 24576000, 1, 7, 0xdd4413 }
345 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
346 int pll_id, unsigned int freq_in, unsigned int freq_out)
348 struct snd_soc_codec *codec = codec_dai->codec;
352 if (freq_in == 0 || freq_out == 0) {
353 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
354 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
358 for (i = 0; i < ARRAY_SIZE(pll); i++) {
359 if (freq_in == pll[i].in_hz && freq_out == pll[i].out_hz) {
360 wm8974_write(codec, WM8974_PLLN,
361 (pll[i].pre << 4) | pll[i].n);
362 wm8974_write(codec, WM8974_PLLK1, pll[i].k >> 18);
363 wm8974_write(codec, WM8974_PLLK2,
364 (pll[i].k >> 9) & 0x1ff);
365 wm8974_write(codec, WM8974_PLLK3, pll[i].k & 0x1ff);
366 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
367 wm8974_write(codec, WM8974_POWER1, reg | 0x020);
376 * Configure WM8974 clock dividers.
378 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
381 struct snd_soc_codec *codec = codec_dai->codec;
385 case WM8974_OPCLKDIV:
386 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
387 wm8974_write(codec, WM8974_GPIO, reg | div);
390 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
391 wm8974_write(codec, WM8974_CLOCK, reg | div);
394 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
395 wm8974_write(codec, WM8974_ADC, reg | div);
398 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
399 wm8974_write(codec, WM8974_DAC, reg | div);
402 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
403 wm8974_write(codec, WM8974_CLOCK, reg | div);
412 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
415 struct snd_soc_codec *codec = codec_dai->codec;
417 u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
419 /* set master/slave audio interface */
420 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
421 case SND_SOC_DAIFMT_CBM_CFM:
424 case SND_SOC_DAIFMT_CBS_CFS:
430 /* interface format */
431 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
432 case SND_SOC_DAIFMT_I2S:
435 case SND_SOC_DAIFMT_RIGHT_J:
437 case SND_SOC_DAIFMT_LEFT_J:
440 case SND_SOC_DAIFMT_DSP_A:
447 /* clock inversion */
448 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
449 case SND_SOC_DAIFMT_NB_NF:
451 case SND_SOC_DAIFMT_IB_IF:
454 case SND_SOC_DAIFMT_IB_NF:
457 case SND_SOC_DAIFMT_NB_IF:
464 wm8974_write(codec, WM8974_IFACE, iface);
465 wm8974_write(codec, WM8974_CLOCK, clk);
469 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
470 struct snd_pcm_hw_params *params,
471 struct snd_soc_dai *dai)
473 struct snd_soc_codec *codec = dai->codec;
474 u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
475 u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
478 switch (params_format(params)) {
479 case SNDRV_PCM_FORMAT_S16_LE:
481 case SNDRV_PCM_FORMAT_S20_3LE:
484 case SNDRV_PCM_FORMAT_S24_LE:
487 case SNDRV_PCM_FORMAT_S32_LE:
492 /* filter coefficient */
493 switch (params_rate(params)) {
494 case SNDRV_PCM_RATE_8000:
497 case SNDRV_PCM_RATE_11025:
500 case SNDRV_PCM_RATE_16000:
503 case SNDRV_PCM_RATE_22050:
506 case SNDRV_PCM_RATE_32000:
509 case SNDRV_PCM_RATE_44100:
513 wm8974_write(codec, WM8974_IFACE, iface);
514 wm8974_write(codec, WM8974_ADD, adn);
518 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
520 struct snd_soc_codec *codec = dai->codec;
521 u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
524 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
526 wm8974_write(codec, WM8974_DAC, mute_reg);
530 /* liam need to make this lower power with dapm */
531 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
532 enum snd_soc_bias_level level)
534 u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
537 case SND_SOC_BIAS_ON:
538 case SND_SOC_BIAS_PREPARE:
539 power1 |= 0x1; /* VMID 50k */
540 wm8974_write(codec, WM8974_POWER1, power1);
543 case SND_SOC_BIAS_STANDBY:
544 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
546 if (codec->bias_level == SND_SOC_BIAS_OFF) {
547 /* Initial cap charge at VMID 5k */
548 wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
552 power1 |= 0x2; /* VMID 500k */
553 wm8974_write(codec, WM8974_POWER1, power1);
556 case SND_SOC_BIAS_OFF:
557 wm8974_write(codec, WM8974_POWER1, 0);
558 wm8974_write(codec, WM8974_POWER2, 0);
559 wm8974_write(codec, WM8974_POWER3, 0);
563 codec->bias_level = level;
567 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
569 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
570 SNDRV_PCM_FMTBIT_S24_LE)
572 static struct snd_soc_dai_ops wm8974_ops = {
573 .hw_params = wm8974_pcm_hw_params,
574 .digital_mute = wm8974_mute,
575 .set_fmt = wm8974_set_dai_fmt,
576 .set_clkdiv = wm8974_set_dai_clkdiv,
577 .set_pll = wm8974_set_dai_pll,
580 struct snd_soc_dai wm8974_dai = {
581 .name = "WM8974 HiFi",
583 .stream_name = "Playback",
586 .rates = WM8974_RATES,
587 .formats = WM8974_FORMATS,},
589 .stream_name = "Capture",
592 .rates = WM8974_RATES,
593 .formats = WM8974_FORMATS,},
596 EXPORT_SYMBOL_GPL(wm8974_dai);
598 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
600 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
601 struct snd_soc_codec *codec = socdev->card->codec;
603 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
607 static int wm8974_resume(struct platform_device *pdev)
609 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
610 struct snd_soc_codec *codec = socdev->card->codec;
613 u16 *cache = codec->reg_cache;
615 /* Sync reg_cache with the hardware */
616 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
617 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
618 data[1] = cache[i] & 0x00ff;
619 codec->hw_write(codec->control_data, data, 2);
621 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
622 wm8974_set_bias_level(codec, codec->suspend_bias_level);
626 static int wm8974_probe(struct platform_device *pdev)
628 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
629 struct snd_soc_codec *codec;
632 if (wm8974_codec == NULL) {
633 dev_err(&pdev->dev, "Codec device not registered\n");
637 socdev->card->codec = wm8974_codec;
638 codec = wm8974_codec;
641 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
643 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
647 snd_soc_add_controls(codec, wm8974_snd_controls,
648 ARRAY_SIZE(wm8974_snd_controls));
649 wm8974_add_widgets(codec);
650 ret = snd_soc_init_card(socdev);
652 dev_err(codec->dev, "failed to register card: %d\n", ret);
659 snd_soc_free_pcms(socdev);
660 snd_soc_dapm_free(socdev);
665 /* power down chip */
666 static int wm8974_remove(struct platform_device *pdev)
668 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
670 snd_soc_free_pcms(socdev);
671 snd_soc_dapm_free(socdev);
676 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
677 .probe = wm8974_probe,
678 .remove = wm8974_remove,
679 .suspend = wm8974_suspend,
680 .resume = wm8974_resume,
682 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
684 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
687 struct snd_soc_codec *codec = &wm8974->codec;
690 dev_err(codec->dev, "Another WM8974 is registered\n");
694 mutex_init(&codec->mutex);
695 INIT_LIST_HEAD(&codec->dapm_widgets);
696 INIT_LIST_HEAD(&codec->dapm_paths);
698 codec->private_data = wm8974;
699 codec->name = "WM8974";
700 codec->owner = THIS_MODULE;
701 codec->read = wm8974_read_reg_cache;
702 codec->write = wm8974_write;
703 codec->bias_level = SND_SOC_BIAS_OFF;
704 codec->set_bias_level = wm8974_set_bias_level;
705 codec->dai = &wm8974_dai;
707 codec->reg_cache_size = WM8974_CACHEREGNUM;
708 codec->reg_cache = &wm8974->reg_cache;
710 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
712 ret = wm8974_reset(codec);
714 dev_err(codec->dev, "Failed to issue reset\n");
718 wm8974_dai.dev = codec->dev;
720 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
722 wm8974_codec = codec;
724 ret = snd_soc_register_codec(codec);
726 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
730 ret = snd_soc_register_dai(&wm8974_dai);
732 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
733 snd_soc_unregister_codec(codec);
740 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
742 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
743 snd_soc_unregister_dai(&wm8974_dai);
744 snd_soc_unregister_codec(&wm8974->codec);
749 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
750 const struct i2c_device_id *id)
752 struct wm8974_priv *wm8974;
753 struct snd_soc_codec *codec;
755 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
759 codec = &wm8974->codec;
760 codec->hw_write = (hw_write_t)i2c_master_send;
762 i2c_set_clientdata(i2c, wm8974);
763 codec->control_data = i2c;
765 codec->dev = &i2c->dev;
767 return wm8974_register(wm8974);
770 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
772 struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
773 wm8974_unregister(wm8974);
777 static const struct i2c_device_id wm8974_i2c_id[] = {
781 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
783 static struct i2c_driver wm8974_i2c_driver = {
785 .name = "WM8974 I2C Codec",
786 .owner = THIS_MODULE,
788 .probe = wm8974_i2c_probe,
789 .remove = __devexit_p(wm8974_i2c_remove),
790 .id_table = wm8974_i2c_id,
793 static int __init wm8974_modinit(void)
795 return i2c_add_driver(&wm8974_i2c_driver);
797 module_init(wm8974_modinit);
799 static void __exit wm8974_exit(void)
801 i2c_del_driver(&wm8974_i2c_driver);
803 module_exit(wm8974_exit);
805 MODULE_DESCRIPTION("ASoC WM8974 driver");
806 MODULE_AUTHOR("Liam Girdwood");
807 MODULE_LICENSE("GPL");