2 * wm8974.c -- WM8974 ALSA Soc Audio driver
4 * Copyright 2006 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/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 #define AUDIO_NAME "wm8974"
32 #define WM8974_VERSION "0.6"
34 struct snd_soc_codec_device soc_codec_dev_wm8974;
37 * wm8974 register cache
38 * We can't read the WM8974 register space when we are
39 * using 2 wire for device control, so we cache them instead.
41 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
42 0x0000, 0x0000, 0x0000, 0x0000,
43 0x0050, 0x0000, 0x0140, 0x0000,
44 0x0000, 0x0000, 0x0000, 0x00ff,
45 0x0000, 0x0000, 0x0100, 0x00ff,
46 0x0000, 0x0000, 0x012c, 0x002c,
47 0x002c, 0x002c, 0x002c, 0x0000,
48 0x0032, 0x0000, 0x0000, 0x0000,
49 0x0000, 0x0000, 0x0000, 0x0000,
50 0x0038, 0x000b, 0x0032, 0x0000,
51 0x0008, 0x000c, 0x0093, 0x00e9,
52 0x0000, 0x0000, 0x0000, 0x0000,
53 0x0003, 0x0010, 0x0000, 0x0000,
54 0x0000, 0x0002, 0x0000, 0x0000,
55 0x0000, 0x0000, 0x0039, 0x0000,
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 /* add non dapm controls */
212 static int wm8974_add_controls(struct snd_soc_codec *codec)
216 for (i = 0; i < ARRAY_SIZE(wm8974_snd_controls); i++) {
217 err = snd_ctl_add(codec->card,
218 snd_soc_cnew(&wm8974_snd_controls[i],codec, NULL));
226 /* Speaker Output Mixer */
227 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
228 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
229 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
230 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
233 /* Mono Output Mixer */
234 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
235 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
236 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
237 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 1),
240 /* AUX Input boost vol */
241 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
242 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
244 /* Mic Input boost vol */
245 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
246 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
248 /* Capture boost switch */
249 static const struct snd_kcontrol_new wm8974_capture_boost_controls =
250 SOC_DAPM_SINGLE("Capture Boost Switch", WM8974_INPPGA, 6, 1, 0);
253 static const struct snd_kcontrol_new wm8974_aux_capture_boost_controls =
254 SOC_DAPM_SINGLE("Aux Capture Boost Switch", WM8974_INPPGA, 2, 1, 0);
256 /* Mic P In to PGA */
257 static const struct snd_kcontrol_new wm8974_micp_capture_boost_controls =
258 SOC_DAPM_SINGLE("Mic P Capture Boost Switch", WM8974_INPPGA, 0, 1, 0);
260 /* Mic N In to PGA */
261 static const struct snd_kcontrol_new wm8974_micn_capture_boost_controls =
262 SOC_DAPM_SINGLE("Mic N Capture Boost Switch", WM8974_INPPGA, 1, 1, 0);
264 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
265 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
266 &wm8974_speaker_mixer_controls[0],
267 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
268 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
269 &wm8974_mono_mixer_controls[0],
270 ARRAY_SIZE(wm8974_mono_mixer_controls)),
271 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
272 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER3, 0, 0),
273 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
274 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
275 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
276 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
277 SND_SOC_DAPM_PGA("Mic PGA", WM8974_POWER2, 2, 0, NULL, 0),
279 SND_SOC_DAPM_PGA("Aux Boost", SND_SOC_NOPM, 0, 0,
280 &wm8974_aux_boost_controls, 1),
281 SND_SOC_DAPM_PGA("Mic Boost", SND_SOC_NOPM, 0, 0,
282 &wm8974_mic_boost_controls, 1),
283 SND_SOC_DAPM_SWITCH("Capture Boost", SND_SOC_NOPM, 0, 0,
284 &wm8974_capture_boost_controls),
286 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0, NULL, 0),
288 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
290 SND_SOC_DAPM_INPUT("MICN"),
291 SND_SOC_DAPM_INPUT("MICP"),
292 SND_SOC_DAPM_INPUT("AUX"),
293 SND_SOC_DAPM_OUTPUT("MONOOUT"),
294 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
295 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
298 static const struct snd_soc_dapm_route audio_map[] = {
299 /* Mono output mixer */
300 {"Mono Mixer", "PCM Playback Switch", "DAC"},
301 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
302 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
304 /* Speaker output mixer */
305 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
306 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
307 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
310 {"Mono Out", NULL, "Mono Mixer"},
311 {"MONOOUT", NULL, "Mono Out"},
312 {"SpkN Out", NULL, "Speaker Mixer"},
313 {"SpkP Out", NULL, "Speaker Mixer"},
314 {"SPKOUTN", NULL, "SpkN Out"},
315 {"SPKOUTP", NULL, "SpkP Out"},
318 {"Boost Mixer", NULL, "ADC"},
319 {"Capture Boost Switch", "Aux Capture Boost Switch", "AUX"},
320 {"Aux Boost", "Aux Volume", "Boost Mixer"},
321 {"Capture Boost", "Capture Switch", "Boost Mixer"},
322 {"Mic Boost", "Mic Volume", "Boost Mixer"},
325 {"MICP", NULL, "Mic Boost"},
326 {"MICN", NULL, "Mic PGA"},
327 {"Mic PGA", NULL, "Capture Boost"},
328 {"AUX", NULL, "Aux Input"},
331 static int wm8974_add_widgets(struct snd_soc_codec *codec)
333 snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
334 ARRAY_SIZE(wm8974_dapm_widgets));
336 snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
338 snd_soc_dapm_new_widgets(codec);
343 unsigned int in_hz, out_hz;
344 unsigned int pre:4; /* prescale - 1 */
349 static struct pll_ pll[] = {
350 {12000000, 11289600, 0, 7, 0x86c220},
351 {12000000, 12288000, 0, 8, 0x3126e8},
352 {13000000, 11289600, 0, 6, 0xf28bd4},
353 {13000000, 12288000, 0, 7, 0x8fd525},
354 {12288000, 11289600, 0, 7, 0x59999a},
355 {11289600, 12288000, 0, 8, 0x80dee9},
356 /* liam - add more entries */
359 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
360 int pll_id, unsigned int freq_in, unsigned int freq_out)
362 struct snd_soc_codec *codec = codec_dai->codec;
366 if(freq_in == 0 || freq_out == 0) {
367 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
368 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
372 for(i = 0; i < ARRAY_SIZE(pll); i++) {
373 if (freq_in == pll[i].in_hz && freq_out == pll[i].out_hz) {
374 wm8974_write(codec, WM8974_PLLN, (pll[i].pre << 4) | pll[i].n);
375 wm8974_write(codec, WM8974_PLLK1, pll[i].k >> 18);
376 wm8974_write(codec, WM8974_PLLK2, (pll[i].k >> 9) & 0x1ff);
377 wm8974_write(codec, WM8974_PLLK3, pll[i].k & 0x1ff);
378 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
379 wm8974_write(codec, WM8974_POWER1, reg | 0x020);
387 * Configure WM8974 clock dividers.
389 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
392 struct snd_soc_codec *codec = codec_dai->codec;
396 case WM8974_OPCLKDIV:
397 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
398 wm8974_write(codec, WM8974_GPIO, reg | div);
401 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
402 wm8974_write(codec, WM8974_CLOCK, reg | div);
405 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
406 wm8974_write(codec, WM8974_ADC, reg | div);
409 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
410 wm8974_write(codec, WM8974_DAC, reg | div);
413 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
414 wm8974_write(codec, WM8974_CLOCK, reg | div);
423 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
426 struct snd_soc_codec *codec = codec_dai->codec;
428 u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
430 /* set master/slave audio interface */
431 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
432 case SND_SOC_DAIFMT_CBM_CFM:
435 case SND_SOC_DAIFMT_CBS_CFS:
441 /* interface format */
442 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
443 case SND_SOC_DAIFMT_I2S:
446 case SND_SOC_DAIFMT_RIGHT_J:
448 case SND_SOC_DAIFMT_LEFT_J:
451 case SND_SOC_DAIFMT_DSP_A:
458 /* clock inversion */
459 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
460 case SND_SOC_DAIFMT_NB_NF:
462 case SND_SOC_DAIFMT_IB_IF:
465 case SND_SOC_DAIFMT_IB_NF:
468 case SND_SOC_DAIFMT_NB_IF:
475 wm8974_write(codec, WM8974_IFACE, iface);
476 wm8974_write(codec, WM8974_CLOCK, clk);
480 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
481 struct snd_pcm_hw_params *params,
482 struct snd_soc_dai *dai)
484 struct snd_soc_codec *codec = dai->codec;
485 u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
486 u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
489 switch (params_format(params)) {
490 case SNDRV_PCM_FORMAT_S16_LE:
492 case SNDRV_PCM_FORMAT_S20_3LE:
495 case SNDRV_PCM_FORMAT_S24_LE:
498 case SNDRV_PCM_FORMAT_S32_LE:
503 /* filter coefficient */
504 switch (params_rate(params)) {
505 case SNDRV_PCM_RATE_8000:
508 case SNDRV_PCM_RATE_11025:
511 case SNDRV_PCM_RATE_16000:
514 case SNDRV_PCM_RATE_22050:
517 case SNDRV_PCM_RATE_32000:
520 case SNDRV_PCM_RATE_44100:
524 wm8974_write(codec, WM8974_IFACE, iface);
525 wm8974_write(codec, WM8974_ADD, adn);
529 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
531 struct snd_soc_codec *codec = dai->codec;
532 u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
535 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
537 wm8974_write(codec, WM8974_DAC, mute_reg);
541 /* liam need to make this lower power with dapm */
542 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
543 enum snd_soc_bias_level level)
546 case SND_SOC_BIAS_ON:
547 wm8974_write(codec, WM8974_POWER1, 0x1ff);
548 wm8974_write(codec, WM8974_POWER2, 0x1ff);
549 wm8974_write(codec, WM8974_POWER3, 0x1ff);
551 case SND_SOC_BIAS_PREPARE:
553 case SND_SOC_BIAS_STANDBY:
555 case SND_SOC_BIAS_OFF:
556 wm8974_write(codec, WM8974_POWER1, 0x0);
557 wm8974_write(codec, WM8974_POWER2, 0x0);
558 wm8974_write(codec, WM8974_POWER3, 0x0);
561 codec->bias_level = level;
565 #define WM8974_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
566 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | \
567 SNDRV_PCM_RATE_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);
627 * initialise the WM8974 driver
628 * register the mixer and dsp interfaces with the kernel
630 static int wm8974_init(struct snd_soc_device *socdev)
632 struct snd_soc_codec *codec = socdev->card->codec;
635 codec->name = "WM8974";
636 codec->owner = THIS_MODULE;
637 codec->read = wm8974_read_reg_cache;
638 codec->write = wm8974_write;
639 codec->set_bias_level = wm8974_set_bias_level;
640 codec->dai = &wm8974_dai;
642 codec->reg_cache_size = ARRAY_SIZE(wm8974_reg);
643 codec->reg_cache = kmemdup(wm8974_reg, sizeof(wm8974_reg), GFP_KERNEL);
645 if (codec->reg_cache == NULL)
651 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
653 printk(KERN_ERR "wm8974: failed to create pcms\n");
657 /* power on device */
658 wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
659 wm8974_add_controls(codec);
660 wm8974_add_widgets(codec);
661 ret = snd_soc_init_card(socdev);
663 printk(KERN_ERR "wm8974: failed to register card\n");
669 snd_soc_free_pcms(socdev);
670 snd_soc_dapm_free(socdev);
672 kfree(codec->reg_cache);
676 static struct snd_soc_device *wm8974_socdev;
678 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
681 * WM8974 2 wire address is 0x1a
683 #define I2C_DRIVERID_WM8974 0xfefe /* liam - need a proper id */
685 static unsigned short normal_i2c[] = { 0, I2C_CLIENT_END };
687 /* Magic definition of all other variables and things */
690 static struct i2c_driver wm8974_i2c_driver;
691 static struct i2c_client client_template;
693 /* If the i2c layer weren't so broken, we could pass this kind of data
696 static int wm8974_codec_probe(struct i2c_adapter *adap, int addr, int kind)
698 struct snd_soc_device *socdev = wm8974_socdev;
699 struct wm8974_setup_data *setup = socdev->codec_data;
700 struct snd_soc_codec *codec = socdev->card->codec;
701 struct i2c_client *i2c;
704 if (addr != setup->i2c_address)
707 client_template.adapter = adap;
708 client_template.addr = addr;
710 i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
715 i2c_set_clientdata(i2c, codec);
716 codec->control_data = i2c;
718 ret = i2c_attach_client(i2c);
720 pr_err("failed to attach codec at addr %x\n", addr);
724 ret = wm8974_init(socdev);
726 pr_err("failed to initialise WM8974\n");
737 static int wm8974_i2c_detach(struct i2c_client *client)
739 struct snd_soc_codec *codec = i2c_get_clientdata(client);
740 i2c_detach_client(client);
741 kfree(codec->reg_cache);
746 static int wm8974_i2c_attach(struct i2c_adapter *adap)
748 return i2c_probe(adap, &addr_data, wm8974_codec_probe);
751 /* corgi i2c codec control layer */
752 static struct i2c_driver wm8974_i2c_driver = {
754 .name = "WM8974 I2C Codec",
755 .owner = THIS_MODULE,
757 .id = I2C_DRIVERID_WM8974,
758 .attach_adapter = wm8974_i2c_attach,
759 .detach_client = wm8974_i2c_detach,
763 static struct i2c_client client_template = {
765 .driver = &wm8974_i2c_driver,
769 static int wm8974_probe(struct platform_device *pdev)
771 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
772 struct wm8974_setup_data *setup;
773 struct snd_soc_codec *codec;
776 pr_info("WM8974 Audio Codec %s", WM8974_VERSION);
778 setup = socdev->codec_data;
779 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
783 socdev->card->codec = codec;
784 mutex_init(&codec->mutex);
785 INIT_LIST_HEAD(&codec->dapm_widgets);
786 INIT_LIST_HEAD(&codec->dapm_paths);
788 wm8974_socdev = socdev;
789 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
790 if (setup->i2c_address) {
791 normal_i2c[0] = setup->i2c_address;
792 codec->hw_write = (hw_write_t)i2c_master_send;
793 ret = i2c_add_driver(&wm8974_i2c_driver);
795 printk(KERN_ERR "can't add i2c driver");
798 /* Add other interfaces here */
803 /* power down chip */
804 static int wm8974_remove(struct platform_device *pdev)
806 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
807 struct snd_soc_codec *codec = socdev->card->codec;
809 if (codec->control_data)
810 wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
812 snd_soc_free_pcms(socdev);
813 snd_soc_dapm_free(socdev);
814 #if defined (CONFIG_I2C) || defined (CONFIG_I2C_MODULE)
815 i2c_del_driver(&wm8974_i2c_driver);
822 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
823 .probe = wm8974_probe,
824 .remove = wm8974_remove,
825 .suspend = wm8974_suspend,
826 .resume = wm8974_resume,
828 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
830 static int __init wm8974_modinit(void)
832 return snd_soc_register_dai(&wm8974_dai);
834 module_init(wm8974_modinit);
836 static void __exit wm8974_exit(void)
838 snd_soc_unregister_dai(&wm8974_dai);
840 module_exit(wm8974_exit);
842 MODULE_DESCRIPTION("ASoC WM8974 driver");
843 MODULE_AUTHOR("Liam Girdwood");
844 MODULE_LICENSE("GPL");