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>
28 #include <sound/tlv.h>
32 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
33 0x0000, 0x0000, 0x0000, 0x0000,
34 0x0050, 0x0000, 0x0140, 0x0000,
35 0x0000, 0x0000, 0x0000, 0x00ff,
36 0x0000, 0x0000, 0x0100, 0x00ff,
37 0x0000, 0x0000, 0x012c, 0x002c,
38 0x002c, 0x002c, 0x002c, 0x0000,
39 0x0032, 0x0000, 0x0000, 0x0000,
40 0x0000, 0x0000, 0x0000, 0x0000,
41 0x0038, 0x000b, 0x0032, 0x0000,
42 0x0008, 0x000c, 0x0093, 0x00e9,
43 0x0000, 0x0000, 0x0000, 0x0000,
44 0x0003, 0x0010, 0x0000, 0x0000,
45 0x0000, 0x0002, 0x0000, 0x0000,
46 0x0000, 0x0000, 0x0039, 0x0000,
50 #define WM8974_POWER1_BIASEN 0x08
51 #define WM8974_POWER1_BUFIOEN 0x10
54 struct snd_soc_codec codec;
55 u16 reg_cache[WM8974_CACHEREGNUM];
58 static struct snd_soc_codec *wm8974_codec;
61 * read wm8974 register cache
63 static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
66 u16 *cache = codec->reg_cache;
67 if (reg == WM8974_RESET)
69 if (reg >= WM8974_CACHEREGNUM)
75 * write wm8974 register cache
77 static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
78 u16 reg, unsigned int value)
80 u16 *cache = codec->reg_cache;
81 if (reg >= WM8974_CACHEREGNUM)
87 * write to the WM8974 register space
89 static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
95 * D15..D9 WM8974 register offset
96 * D8...D0 register data
98 data[0] = (reg << 1) | ((value >> 8) & 0x0001);
99 data[1] = value & 0x00ff;
101 wm8974_write_reg_cache(codec, reg, value);
102 if (codec->hw_write(codec->control_data, data, 2) == 2)
108 #define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
110 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
111 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
112 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
113 static const char *wm8974_bw[] = {"Narrow", "Wide" };
114 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
115 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
116 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
117 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
118 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
119 static const char *wm8974_alc[] = {"ALC", "Limiter" };
121 static const struct soc_enum wm8974_enum[] = {
122 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
123 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
124 SOC_ENUM_SINGLE(WM8974_DAC, 4, 4, wm8974_deemp),
125 SOC_ENUM_SINGLE(WM8974_EQ1, 8, 2, wm8974_eqmode),
127 SOC_ENUM_SINGLE(WM8974_EQ1, 5, 4, wm8974_eq1),
128 SOC_ENUM_SINGLE(WM8974_EQ2, 8, 2, wm8974_bw),
129 SOC_ENUM_SINGLE(WM8974_EQ2, 5, 4, wm8974_eq2),
130 SOC_ENUM_SINGLE(WM8974_EQ3, 8, 2, wm8974_bw),
132 SOC_ENUM_SINGLE(WM8974_EQ3, 5, 4, wm8974_eq3),
133 SOC_ENUM_SINGLE(WM8974_EQ4, 8, 2, wm8974_bw),
134 SOC_ENUM_SINGLE(WM8974_EQ4, 5, 4, wm8974_eq4),
135 SOC_ENUM_SINGLE(WM8974_EQ5, 8, 2, wm8974_bw),
137 SOC_ENUM_SINGLE(WM8974_EQ5, 5, 4, wm8974_eq5),
138 SOC_ENUM_SINGLE(WM8974_ALC3, 8, 2, wm8974_alc),
141 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
142 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
143 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
144 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
146 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
148 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
150 SOC_ENUM("DAC Companding", wm8974_enum[1]),
151 SOC_ENUM("ADC Companding", wm8974_enum[0]),
153 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
154 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
156 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
158 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
159 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
160 SOC_SINGLE("ADC Inversion Switch", WM8974_COMP, 0, 1, 0),
162 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
164 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
165 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
166 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
168 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
169 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
170 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
172 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
173 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
174 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
176 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
177 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
178 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
180 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
181 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
182 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
184 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
185 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
186 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
188 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
189 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
191 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
192 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
193 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
195 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
196 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
197 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
199 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
200 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
201 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
203 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
204 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
206 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
207 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
209 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
210 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
211 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 1, spk_tlv),
213 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
214 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 0),
217 /* Speaker Output Mixer */
218 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
219 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
220 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
221 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
224 /* Mono Output Mixer */
225 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
226 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
227 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
228 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 1),
231 /* AUX Input boost vol */
232 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
233 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
235 /* Mic Input boost vol */
236 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
237 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
239 /* Capture boost switch */
240 static const struct snd_kcontrol_new wm8974_capture_boost_controls =
241 SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA, 6, 1, 0);
244 static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls =
245 SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA, 2, 1, 0);
247 /* Mic P In to PGA */
248 static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls =
249 SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA, 0, 1, 0);
251 /* Mic N In to PGA */
252 static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls =
253 SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA, 1, 1, 0);
255 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
256 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
257 &wm8974_speaker_mixer_controls[0],
258 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
259 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
260 &wm8974_mono_mixer_controls[0],
261 ARRAY_SIZE(wm8974_mono_mixer_controls)),
262 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
263 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER3, 0, 0),
264 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
265 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
266 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
267 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
268 SND_SOC_DAPM_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0),
270 SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0,
271 &wm8974_aux_boost_controls, 1),
272 SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0,
273 &wm8974_mic_boost_controls, 1),
274 SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0,
275 &wm8974_capture_boost_controls),
277 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0),
279 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
281 SND_SOC_DAPM_INPUT("MICN"),
282 SND_SOC_DAPM_INPUT("MICP"),
283 SND_SOC_DAPM_INPUT("AUX"),
284 SND_SOC_DAPM_OUTPUT("MONOOUT"),
285 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
286 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
289 static const struct snd_soc_dapm_route audio_map[] = {
290 /* Mono output mixer */
291 {"Mono Mixer", "PCM Playback Switch", "DAC"},
292 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
293 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
295 /* Speaker output mixer */
296 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
297 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
298 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
301 {"Mono Out", NULL, "Mono Mixer"},
302 {"MONOOUT", NULL, "Mono Out"},
303 {"SpkN Out", NULL, "Speaker Mixer"},
304 {"SpkP Out", NULL, "Speaker Mixer"},
305 {"SPKOUTN", NULL, "SpkN Out"},
306 {"SPKOUTP", NULL, "SpkP Out"},
309 {"Boost Mixer", NULL, "ADC"},
310 {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"},
311 {"Aux Boost", "Aux Volume", "Boost Mixer"},
312 {"Capture Boost", "Capture Switch", "Boost Mixer"},
313 {"Mic Boost", "Mic Volume", "Boost Mixer"},
316 {"MICP", NULL, "Mic Boost"},
317 {"MICN", NULL, "Mic PGA"},
318 {"Mic PGA", NULL, "Capture Boost"},
319 {"AUX", NULL, "Aux Input"},
322 static int wm8974_add_widgets(struct snd_soc_codec *codec)
324 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
325 ARRAY_SIZE(wm8974_dapm_widgets));
327 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
329 snd_soc_dapm_new_widgets(codec);
334 unsigned int pre_div:4; /* prescale - 1 */
339 static struct pll_ pll_div;
341 /* The size in bits of the pll divide multiplied by 10
342 * to allow rounding later */
343 #define FIXED_PLL_SIZE ((1 << 24) * 10)
345 static void pll_factors(unsigned int target, unsigned int source)
347 unsigned long long Kpart;
348 unsigned int K, Ndiv, Nmod;
350 Ndiv = target / source;
354 Ndiv = target / source;
358 if ((Ndiv < 6) || (Ndiv > 12))
360 "WM8974 N value %u outwith recommended range!d\n",
364 Nmod = target % source;
365 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
367 do_div(Kpart, source);
369 K = Kpart & 0xFFFFFFFF;
371 /* Check if we need to round */
375 /* Move down to proper range now rounding is done */
381 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
382 int pll_id, unsigned int freq_in, unsigned int freq_out)
384 struct snd_soc_codec *codec = codec_dai->codec;
387 if (freq_in == 0 || freq_out == 0) {
388 /* Clock CODEC directly from MCLK */
389 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
390 wm8974_write(codec, WM8974_CLOCK, reg & 0x0ff);
393 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
394 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
398 pll_factors(freq_out*4, freq_in);
400 wm8974_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
401 wm8974_write(codec, WM8974_PLLK1, pll_div.k >> 18);
402 wm8974_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
403 wm8974_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
404 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
405 wm8974_write(codec, WM8974_POWER1, reg | 0x020);
407 /* Run CODEC from PLL instead of MCLK */
408 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
409 wm8974_write(codec, WM8974_CLOCK, reg | 0x100);
415 * Configure WM8974 clock dividers.
417 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
420 struct snd_soc_codec *codec = codec_dai->codec;
424 case WM8974_OPCLKDIV:
425 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
426 wm8974_write(codec, WM8974_GPIO, reg | div);
429 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
430 wm8974_write(codec, WM8974_CLOCK, reg | div);
433 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
434 wm8974_write(codec, WM8974_ADC, reg | div);
437 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
438 wm8974_write(codec, WM8974_DAC, reg | div);
441 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
442 wm8974_write(codec, WM8974_CLOCK, reg | div);
451 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
454 struct snd_soc_codec *codec = codec_dai->codec;
456 u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
458 /* set master/slave audio interface */
459 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
460 case SND_SOC_DAIFMT_CBM_CFM:
463 case SND_SOC_DAIFMT_CBS_CFS:
469 /* interface format */
470 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
471 case SND_SOC_DAIFMT_I2S:
474 case SND_SOC_DAIFMT_RIGHT_J:
476 case SND_SOC_DAIFMT_LEFT_J:
479 case SND_SOC_DAIFMT_DSP_A:
486 /* clock inversion */
487 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
488 case SND_SOC_DAIFMT_NB_NF:
490 case SND_SOC_DAIFMT_IB_IF:
493 case SND_SOC_DAIFMT_IB_NF:
496 case SND_SOC_DAIFMT_NB_IF:
503 wm8974_write(codec, WM8974_IFACE, iface);
504 wm8974_write(codec, WM8974_CLOCK, clk);
508 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
509 struct snd_pcm_hw_params *params,
510 struct snd_soc_dai *dai)
512 struct snd_soc_codec *codec = dai->codec;
513 u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
514 u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
517 switch (params_format(params)) {
518 case SNDRV_PCM_FORMAT_S16_LE:
520 case SNDRV_PCM_FORMAT_S20_3LE:
523 case SNDRV_PCM_FORMAT_S24_LE:
526 case SNDRV_PCM_FORMAT_S32_LE:
531 /* filter coefficient */
532 switch (params_rate(params)) {
533 case SNDRV_PCM_RATE_8000:
536 case SNDRV_PCM_RATE_11025:
539 case SNDRV_PCM_RATE_16000:
542 case SNDRV_PCM_RATE_22050:
545 case SNDRV_PCM_RATE_32000:
548 case SNDRV_PCM_RATE_44100:
552 wm8974_write(codec, WM8974_IFACE, iface);
553 wm8974_write(codec, WM8974_ADD, adn);
557 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
559 struct snd_soc_codec *codec = dai->codec;
560 u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
563 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
565 wm8974_write(codec, WM8974_DAC, mute_reg);
569 /* liam need to make this lower power with dapm */
570 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
571 enum snd_soc_bias_level level)
573 u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
576 case SND_SOC_BIAS_ON:
577 case SND_SOC_BIAS_PREPARE:
578 power1 |= 0x1; /* VMID 50k */
579 wm8974_write(codec, WM8974_POWER1, power1);
582 case SND_SOC_BIAS_STANDBY:
583 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
585 if (codec->bias_level == SND_SOC_BIAS_OFF) {
586 /* Initial cap charge at VMID 5k */
587 wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
591 power1 |= 0x2; /* VMID 500k */
592 wm8974_write(codec, WM8974_POWER1, power1);
595 case SND_SOC_BIAS_OFF:
596 wm8974_write(codec, WM8974_POWER1, 0);
597 wm8974_write(codec, WM8974_POWER2, 0);
598 wm8974_write(codec, WM8974_POWER3, 0);
602 codec->bias_level = level;
606 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
608 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
609 SNDRV_PCM_FMTBIT_S24_LE)
611 static struct snd_soc_dai_ops wm8974_ops = {
612 .hw_params = wm8974_pcm_hw_params,
613 .digital_mute = wm8974_mute,
614 .set_fmt = wm8974_set_dai_fmt,
615 .set_clkdiv = wm8974_set_dai_clkdiv,
616 .set_pll = wm8974_set_dai_pll,
619 struct snd_soc_dai wm8974_dai = {
620 .name = "WM8974 HiFi",
622 .stream_name = "Playback",
624 .channels_max = 2, /* Only 1 channel of data */
625 .rates = WM8974_RATES,
626 .formats = WM8974_FORMATS,},
628 .stream_name = "Capture",
630 .channels_max = 2, /* Only 1 channel of data */
631 .rates = WM8974_RATES,
632 .formats = WM8974_FORMATS,},
635 EXPORT_SYMBOL_GPL(wm8974_dai);
637 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
639 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
640 struct snd_soc_codec *codec = socdev->card->codec;
642 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
646 static int wm8974_resume(struct platform_device *pdev)
648 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
649 struct snd_soc_codec *codec = socdev->card->codec;
652 u16 *cache = codec->reg_cache;
654 /* Sync reg_cache with the hardware */
655 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
656 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
657 data[1] = cache[i] & 0x00ff;
658 codec->hw_write(codec->control_data, data, 2);
660 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
661 wm8974_set_bias_level(codec, codec->suspend_bias_level);
665 static int wm8974_probe(struct platform_device *pdev)
667 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
668 struct snd_soc_codec *codec;
671 if (wm8974_codec == NULL) {
672 dev_err(&pdev->dev, "Codec device not registered\n");
676 socdev->card->codec = wm8974_codec;
677 codec = wm8974_codec;
680 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
682 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
686 snd_soc_add_controls(codec, wm8974_snd_controls,
687 ARRAY_SIZE(wm8974_snd_controls));
688 wm8974_add_widgets(codec);
689 ret = snd_soc_init_card(socdev);
691 dev_err(codec->dev, "failed to register card: %d\n", ret);
698 snd_soc_free_pcms(socdev);
699 snd_soc_dapm_free(socdev);
704 /* power down chip */
705 static int wm8974_remove(struct platform_device *pdev)
707 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
709 snd_soc_free_pcms(socdev);
710 snd_soc_dapm_free(socdev);
715 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
716 .probe = wm8974_probe,
717 .remove = wm8974_remove,
718 .suspend = wm8974_suspend,
719 .resume = wm8974_resume,
721 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
723 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
726 struct snd_soc_codec *codec = &wm8974->codec;
729 dev_err(codec->dev, "Another WM8974 is registered\n");
733 mutex_init(&codec->mutex);
734 INIT_LIST_HEAD(&codec->dapm_widgets);
735 INIT_LIST_HEAD(&codec->dapm_paths);
737 codec->private_data = wm8974;
738 codec->name = "WM8974";
739 codec->owner = THIS_MODULE;
740 codec->read = wm8974_read_reg_cache;
741 codec->write = wm8974_write;
742 codec->bias_level = SND_SOC_BIAS_OFF;
743 codec->set_bias_level = wm8974_set_bias_level;
744 codec->dai = &wm8974_dai;
746 codec->reg_cache_size = WM8974_CACHEREGNUM;
747 codec->reg_cache = &wm8974->reg_cache;
749 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
751 ret = wm8974_reset(codec);
753 dev_err(codec->dev, "Failed to issue reset\n");
757 wm8974_dai.dev = codec->dev;
759 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
761 wm8974_codec = codec;
763 ret = snd_soc_register_codec(codec);
765 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
769 ret = snd_soc_register_dai(&wm8974_dai);
771 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
772 snd_soc_unregister_codec(codec);
779 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
781 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
782 snd_soc_unregister_dai(&wm8974_dai);
783 snd_soc_unregister_codec(&wm8974->codec);
788 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
789 const struct i2c_device_id *id)
791 struct wm8974_priv *wm8974;
792 struct snd_soc_codec *codec;
794 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
798 codec = &wm8974->codec;
799 codec->hw_write = (hw_write_t)i2c_master_send;
801 i2c_set_clientdata(i2c, wm8974);
802 codec->control_data = i2c;
804 codec->dev = &i2c->dev;
806 return wm8974_register(wm8974);
809 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
811 struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
812 wm8974_unregister(wm8974);
816 static const struct i2c_device_id wm8974_i2c_id[] = {
820 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
822 static struct i2c_driver wm8974_i2c_driver = {
824 .name = "WM8974 I2C Codec",
825 .owner = THIS_MODULE,
827 .probe = wm8974_i2c_probe,
828 .remove = __devexit_p(wm8974_i2c_remove),
829 .id_table = wm8974_i2c_id,
832 static int __init wm8974_modinit(void)
834 return i2c_add_driver(&wm8974_i2c_driver);
836 module_init(wm8974_modinit);
838 static void __exit wm8974_exit(void)
840 i2c_del_driver(&wm8974_i2c_driver);
842 module_exit(wm8974_exit);
844 MODULE_DESCRIPTION("ASoC WM8974 driver");
845 MODULE_AUTHOR("Liam Girdwood");
846 MODULE_LICENSE("GPL");