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/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 char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
143 static const struct soc_enum wm8974_auxmode =
144 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text);
146 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
147 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
148 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
149 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
151 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
153 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
155 SOC_ENUM("DAC Companding", wm8974_enum[1]),
156 SOC_ENUM("ADC Companding", wm8974_enum[0]),
158 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
159 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
161 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
163 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
164 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
165 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
167 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
169 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
170 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
171 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
173 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
174 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
175 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
177 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
178 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
179 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
181 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
182 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
183 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
185 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
186 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
187 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
189 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
190 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
191 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
193 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
194 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
196 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
197 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
198 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
200 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
201 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
202 SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
204 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
205 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
206 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
208 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
209 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
211 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
212 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
214 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
215 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
216 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
218 SOC_ENUM("Aux Mode", wm8974_auxmode),
220 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
221 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
224 /* Speaker Output Mixer */
225 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
226 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
227 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
228 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
231 /* Mono Output Mixer */
232 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
233 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
234 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
235 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
239 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
240 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
244 static const struct snd_kcontrol_new wm8974_inpga[] = {
245 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
246 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
247 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
250 /* AUX Input boost vol */
251 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
252 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
254 /* Mic Input boost vol */
255 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
256 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
258 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
259 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
260 &wm8974_speaker_mixer_controls[0],
261 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
262 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
263 &wm8974_mono_mixer_controls[0],
264 ARRAY_SIZE(wm8974_mono_mixer_controls)),
265 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
266 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
267 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
268 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
269 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
270 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
272 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
273 ARRAY_SIZE(wm8974_inpga)),
274 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
275 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
277 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
279 SND_SOC_DAPM_INPUT("MICN"),
280 SND_SOC_DAPM_INPUT("MICP"),
281 SND_SOC_DAPM_INPUT("AUX"),
282 SND_SOC_DAPM_OUTPUT("MONOOUT"),
283 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
284 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
287 static const struct snd_soc_dapm_route audio_map[] = {
288 /* Mono output mixer */
289 {"Mono Mixer", "PCM Playback Switch", "DAC"},
290 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
291 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
293 /* Speaker output mixer */
294 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
295 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
296 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
299 {"Mono Out", NULL, "Mono Mixer"},
300 {"MONOOUT", NULL, "Mono Out"},
301 {"SpkN Out", NULL, "Speaker Mixer"},
302 {"SpkP Out", NULL, "Speaker Mixer"},
303 {"SPKOUTN", NULL, "SpkN Out"},
304 {"SPKOUTP", NULL, "SpkP Out"},
307 {"ADC", NULL, "Boost Mixer"},
308 {"Boost Mixer", "Aux Switch", "Aux Input"},
309 {"Boost Mixer", NULL, "Input PGA"},
310 {"Boost Mixer", NULL, "MICP"},
313 {"Input PGA", "Aux Switch", "Aux Input"},
314 {"Input PGA", "MicN Switch", "MICN"},
315 {"Input PGA", "MicP Switch", "MICP"},
318 {"Aux Input", NULL, "AUX"},
321 static int wm8974_add_widgets(struct snd_soc_codec *codec)
323 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
324 ARRAY_SIZE(wm8974_dapm_widgets));
326 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
328 snd_soc_dapm_new_widgets(codec);
333 unsigned int pre_div:1;
338 /* The size in bits of the pll divide multiplied by 10
339 * to allow rounding later */
340 #define FIXED_PLL_SIZE ((1 << 24) * 10)
342 static void pll_factors(struct pll_ *pll_div,
343 unsigned int target, unsigned int source)
345 unsigned long long Kpart;
346 unsigned int K, Ndiv, Nmod;
348 /* There is a fixed divide by 4 in the output path */
351 Ndiv = target / source;
354 pll_div->pre_div = 1;
355 Ndiv = target / source;
357 pll_div->pre_div = 0;
359 if ((Ndiv < 6) || (Ndiv > 12))
361 "WM8974 N value %u outwith recommended range!\n",
365 Nmod = target % source;
366 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
368 do_div(Kpart, source);
370 K = Kpart & 0xFFFFFFFF;
372 /* Check if we need to round */
376 /* Move down to proper range now rounding is done */
382 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
383 int pll_id, unsigned int freq_in, unsigned int freq_out)
385 struct snd_soc_codec *codec = codec_dai->codec;
389 if (freq_in == 0 || freq_out == 0) {
390 /* Clock CODEC directly from MCLK */
391 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
392 wm8974_write(codec, WM8974_CLOCK, reg & 0x0ff);
395 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
396 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
400 pll_factors(&pll_div, freq_out, freq_in);
402 wm8974_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
403 wm8974_write(codec, WM8974_PLLK1, pll_div.k >> 18);
404 wm8974_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
405 wm8974_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
406 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
407 wm8974_write(codec, WM8974_POWER1, reg | 0x020);
409 /* Run CODEC from PLL instead of MCLK */
410 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
411 wm8974_write(codec, WM8974_CLOCK, reg | 0x100);
417 * Configure WM8974 clock dividers.
419 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
422 struct snd_soc_codec *codec = codec_dai->codec;
426 case WM8974_OPCLKDIV:
427 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
428 wm8974_write(codec, WM8974_GPIO, reg | div);
431 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
432 wm8974_write(codec, WM8974_CLOCK, reg | div);
435 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
436 wm8974_write(codec, WM8974_ADC, reg | div);
439 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
440 wm8974_write(codec, WM8974_DAC, reg | div);
443 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
444 wm8974_write(codec, WM8974_CLOCK, reg | div);
453 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
456 struct snd_soc_codec *codec = codec_dai->codec;
458 u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
460 /* set master/slave audio interface */
461 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
462 case SND_SOC_DAIFMT_CBM_CFM:
465 case SND_SOC_DAIFMT_CBS_CFS:
471 /* interface format */
472 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
473 case SND_SOC_DAIFMT_I2S:
476 case SND_SOC_DAIFMT_RIGHT_J:
478 case SND_SOC_DAIFMT_LEFT_J:
481 case SND_SOC_DAIFMT_DSP_A:
488 /* clock inversion */
489 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
490 case SND_SOC_DAIFMT_NB_NF:
492 case SND_SOC_DAIFMT_IB_IF:
495 case SND_SOC_DAIFMT_IB_NF:
498 case SND_SOC_DAIFMT_NB_IF:
505 wm8974_write(codec, WM8974_IFACE, iface);
506 wm8974_write(codec, WM8974_CLOCK, clk);
510 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
511 struct snd_pcm_hw_params *params,
512 struct snd_soc_dai *dai)
514 struct snd_soc_codec *codec = dai->codec;
515 u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
516 u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
519 switch (params_format(params)) {
520 case SNDRV_PCM_FORMAT_S16_LE:
522 case SNDRV_PCM_FORMAT_S20_3LE:
525 case SNDRV_PCM_FORMAT_S24_LE:
528 case SNDRV_PCM_FORMAT_S32_LE:
533 /* filter coefficient */
534 switch (params_rate(params)) {
535 case SNDRV_PCM_RATE_8000:
538 case SNDRV_PCM_RATE_11025:
541 case SNDRV_PCM_RATE_16000:
544 case SNDRV_PCM_RATE_22050:
547 case SNDRV_PCM_RATE_32000:
550 case SNDRV_PCM_RATE_44100:
551 case SNDRV_PCM_RATE_48000:
555 wm8974_write(codec, WM8974_IFACE, iface);
556 wm8974_write(codec, WM8974_ADD, adn);
560 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
562 struct snd_soc_codec *codec = dai->codec;
563 u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
566 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
568 wm8974_write(codec, WM8974_DAC, mute_reg);
572 /* liam need to make this lower power with dapm */
573 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
574 enum snd_soc_bias_level level)
576 u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
579 case SND_SOC_BIAS_ON:
580 case SND_SOC_BIAS_PREPARE:
581 power1 |= 0x1; /* VMID 50k */
582 wm8974_write(codec, WM8974_POWER1, power1);
585 case SND_SOC_BIAS_STANDBY:
586 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
588 if (codec->bias_level == SND_SOC_BIAS_OFF) {
589 /* Initial cap charge at VMID 5k */
590 wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
594 power1 |= 0x2; /* VMID 500k */
595 wm8974_write(codec, WM8974_POWER1, power1);
598 case SND_SOC_BIAS_OFF:
599 wm8974_write(codec, WM8974_POWER1, 0);
600 wm8974_write(codec, WM8974_POWER2, 0);
601 wm8974_write(codec, WM8974_POWER3, 0);
605 codec->bias_level = level;
609 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
611 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
612 SNDRV_PCM_FMTBIT_S24_LE)
614 static struct snd_soc_dai_ops wm8974_ops = {
615 .hw_params = wm8974_pcm_hw_params,
616 .digital_mute = wm8974_mute,
617 .set_fmt = wm8974_set_dai_fmt,
618 .set_clkdiv = wm8974_set_dai_clkdiv,
619 .set_pll = wm8974_set_dai_pll,
622 struct snd_soc_dai wm8974_dai = {
623 .name = "WM8974 HiFi",
625 .stream_name = "Playback",
627 .channels_max = 2, /* Only 1 channel of data */
628 .rates = WM8974_RATES,
629 .formats = WM8974_FORMATS,},
631 .stream_name = "Capture",
633 .channels_max = 2, /* Only 1 channel of data */
634 .rates = WM8974_RATES,
635 .formats = WM8974_FORMATS,},
637 .symmetric_rates = 1,
639 EXPORT_SYMBOL_GPL(wm8974_dai);
641 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
643 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
644 struct snd_soc_codec *codec = socdev->card->codec;
646 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
650 static int wm8974_resume(struct platform_device *pdev)
652 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
653 struct snd_soc_codec *codec = socdev->card->codec;
656 u16 *cache = codec->reg_cache;
658 /* Sync reg_cache with the hardware */
659 for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
660 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
661 data[1] = cache[i] & 0x00ff;
662 codec->hw_write(codec->control_data, data, 2);
664 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
665 wm8974_set_bias_level(codec, codec->suspend_bias_level);
669 static int wm8974_probe(struct platform_device *pdev)
671 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
672 struct snd_soc_codec *codec;
675 if (wm8974_codec == NULL) {
676 dev_err(&pdev->dev, "Codec device not registered\n");
680 socdev->card->codec = wm8974_codec;
681 codec = wm8974_codec;
684 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
686 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
690 snd_soc_add_controls(codec, wm8974_snd_controls,
691 ARRAY_SIZE(wm8974_snd_controls));
692 wm8974_add_widgets(codec);
693 ret = snd_soc_init_card(socdev);
695 dev_err(codec->dev, "failed to register card: %d\n", ret);
702 snd_soc_free_pcms(socdev);
703 snd_soc_dapm_free(socdev);
708 /* power down chip */
709 static int wm8974_remove(struct platform_device *pdev)
711 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
713 snd_soc_free_pcms(socdev);
714 snd_soc_dapm_free(socdev);
719 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
720 .probe = wm8974_probe,
721 .remove = wm8974_remove,
722 .suspend = wm8974_suspend,
723 .resume = wm8974_resume,
725 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
727 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
730 struct snd_soc_codec *codec = &wm8974->codec;
733 dev_err(codec->dev, "Another WM8974 is registered\n");
737 mutex_init(&codec->mutex);
738 INIT_LIST_HEAD(&codec->dapm_widgets);
739 INIT_LIST_HEAD(&codec->dapm_paths);
741 codec->private_data = wm8974;
742 codec->name = "WM8974";
743 codec->owner = THIS_MODULE;
744 codec->read = wm8974_read_reg_cache;
745 codec->write = wm8974_write;
746 codec->bias_level = SND_SOC_BIAS_OFF;
747 codec->set_bias_level = wm8974_set_bias_level;
748 codec->dai = &wm8974_dai;
750 codec->reg_cache_size = WM8974_CACHEREGNUM;
751 codec->reg_cache = &wm8974->reg_cache;
753 memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
755 ret = wm8974_reset(codec);
757 dev_err(codec->dev, "Failed to issue reset\n");
761 wm8974_dai.dev = codec->dev;
763 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
765 wm8974_codec = codec;
767 ret = snd_soc_register_codec(codec);
769 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
773 ret = snd_soc_register_dai(&wm8974_dai);
775 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
776 snd_soc_unregister_codec(codec);
783 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
785 wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
786 snd_soc_unregister_dai(&wm8974_dai);
787 snd_soc_unregister_codec(&wm8974->codec);
792 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
793 const struct i2c_device_id *id)
795 struct wm8974_priv *wm8974;
796 struct snd_soc_codec *codec;
798 wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
802 codec = &wm8974->codec;
803 codec->hw_write = (hw_write_t)i2c_master_send;
805 i2c_set_clientdata(i2c, wm8974);
806 codec->control_data = i2c;
808 codec->dev = &i2c->dev;
810 return wm8974_register(wm8974);
813 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
815 struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
816 wm8974_unregister(wm8974);
820 static const struct i2c_device_id wm8974_i2c_id[] = {
824 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
826 static struct i2c_driver wm8974_i2c_driver = {
829 .owner = THIS_MODULE,
831 .probe = wm8974_i2c_probe,
832 .remove = __devexit_p(wm8974_i2c_remove),
833 .id_table = wm8974_i2c_id,
836 static int __init wm8974_modinit(void)
838 return i2c_add_driver(&wm8974_i2c_driver);
840 module_init(wm8974_modinit);
842 static void __exit wm8974_exit(void)
844 i2c_del_driver(&wm8974_i2c_driver);
846 module_exit(wm8974_exit);
848 MODULE_DESCRIPTION("ASoC WM8974 driver");
849 MODULE_AUTHOR("Liam Girdwood");
850 MODULE_LICENSE("GPL");