2 * wm8940.c -- WM8940 ALSA Soc Audio driver
4 * Author: Jonathan Cameron <jic23@cam.ac.uk>
7 * Copyright 2006 Wolfson Microelectronics PLC.
8 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * Not currently handled:
15 * Notch filter control
16 * AUXMode (inverting vs mixer)
17 * No means to obtain current gain if alc enabled.
19 * Fast VMID discharge for power down
21 * DLR and ALR Swaps not enabled
22 * Digital Sidetone not supported
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/kernel.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
30 #include <linux/i2c.h>
31 #include <linux/spi/spi.h>
32 #include <linux/slab.h>
33 #include <sound/core.h>
34 #include <sound/pcm.h>
35 #include <sound/pcm_params.h>
36 #include <sound/soc.h>
37 #include <sound/initval.h>
38 #include <sound/tlv.h>
44 enum snd_soc_control_type control_type;
47 static int wm8940_volatile_register(struct snd_soc_codec *codec,
51 case WM8940_SOFTRESET:
58 static u16 wm8940_reg_defaults[] = {
59 0x8940, /* Soft Reset */
63 0x0010, /* Interface Control */
64 0x0000, /* Companding Control */
65 0x0140, /* Clock Control */
66 0x0000, /* Additional Controls */
67 0x0000, /* GPIO Control */
68 0x0002, /* Auto Increment Control */
69 0x0000, /* DAC Control */
70 0x00FF, /* DAC Volume */
73 0x0100, /* ADC Control */
74 0x00FF, /* ADC Volume */
75 0x0000, /* Notch Filter 1 Control 1 */
76 0x0000, /* Notch Filter 1 Control 2 */
77 0x0000, /* Notch Filter 2 Control 1 */
78 0x0000, /* Notch Filter 2 Control 2 */
79 0x0000, /* Notch Filter 3 Control 1 */
80 0x0000, /* Notch Filter 3 Control 2 */
81 0x0000, /* Notch Filter 4 Control 1 */
82 0x0000, /* Notch Filter 4 Control 2 */
83 0x0032, /* DAC Limit Control 1 */
84 0x0000, /* DAC Limit Control 2 */
91 0x0038, /* ALC Control 1 */
92 0x000B, /* ALC Control 2 */
93 0x0032, /* ALC Control 3 */
94 0x0000, /* Noise Gate */
101 0x0030, /* ALC Control 4 */
103 0x0002, /* Input Control */
104 0x0050, /* PGA Gain */
106 0x0002, /* ADC Boost Control */
108 0x0002, /* Output Control */
109 0x0000, /* Speaker Mixer Control */
113 0x0079, /* Speaker Volume */
115 0x0000, /* Mono Mixer Control */
118 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
119 static const struct soc_enum wm8940_adc_companding_enum
120 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
121 static const struct soc_enum wm8940_dac_companding_enum
122 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
124 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
125 static const struct soc_enum wm8940_alc_mode_enum
126 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
128 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
129 static const struct soc_enum wm8940_mic_bias_level_enum
130 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
132 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
133 static const struct soc_enum wm8940_filter_mode_enum
134 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
136 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
137 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
138 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
139 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
140 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
141 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
142 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
143 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
144 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
145 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
147 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
148 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
150 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
151 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
153 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
154 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
155 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
156 3, 7, 1, wm8940_alc_max_tlv),
157 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
158 0, 7, 0, wm8940_alc_min_tlv),
159 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
160 0, 14, 0, wm8940_alc_tar_tlv),
161 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
162 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
163 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
164 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
165 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
167 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
170 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
171 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
172 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
173 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
174 4, 9, 1, wm8940_lim_thresh_tlv),
175 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
176 0, 12, 0, wm8940_lim_boost_tlv),
178 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
179 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
180 0, 63, 0, wm8940_pga_vol_tlv),
181 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
182 0, 255, 0, wm8940_adc_tlv),
183 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
184 0, 255, 0, wm8940_adc_tlv),
185 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
186 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
187 8, 1, 0, wm8940_capture_boost_vol_tlv),
188 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
189 0, 63, 0, wm8940_spk_vol_tlv),
190 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
192 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
193 8, 1, 1, wm8940_att_tlv),
194 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
196 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
197 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
198 7, 1, 1, wm8940_att_tlv),
200 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
201 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
202 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
203 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
204 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
205 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
206 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
209 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
210 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
211 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
212 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
215 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
216 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
217 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
218 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
221 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
222 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
223 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
224 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
225 0, 7, 0, wm8940_boost_vol_tlv),
226 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
227 4, 7, 0, wm8940_boost_vol_tlv),
230 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
231 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
232 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
233 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
236 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
237 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
238 &wm8940_speaker_mixer_controls[0],
239 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
240 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
241 &wm8940_mono_mixer_controls[0],
242 ARRAY_SIZE(wm8940_mono_mixer_controls)),
243 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
245 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
246 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
247 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
248 SND_SOC_DAPM_OUTPUT("MONOOUT"),
249 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
250 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
252 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
253 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
254 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
255 &wm8940_micpga_controls[0],
256 ARRAY_SIZE(wm8940_micpga_controls)),
257 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
258 &wm8940_input_boost_controls[0],
259 ARRAY_SIZE(wm8940_input_boost_controls)),
260 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
262 SND_SOC_DAPM_INPUT("MICN"),
263 SND_SOC_DAPM_INPUT("MICP"),
264 SND_SOC_DAPM_INPUT("AUX"),
267 static const struct snd_soc_dapm_route audio_map[] = {
268 /* Mono output mixer */
269 {"Mono Mixer", "PCM Playback Switch", "DAC"},
270 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
271 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
273 /* Speaker output mixer */
274 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
275 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
276 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
279 {"Mono Out", NULL, "Mono Mixer"},
280 {"MONOOUT", NULL, "Mono Out"},
281 {"SpkN Out", NULL, "Speaker Mixer"},
282 {"SpkP Out", NULL, "Speaker Mixer"},
283 {"SPKOUTN", NULL, "SpkN Out"},
284 {"SPKOUTP", NULL, "SpkP Out"},
287 {"Mic PGA", "MICN Switch", "MICN"},
288 {"Mic PGA", "MICP Switch", "MICP"},
289 {"Mic PGA", "AUX Switch", "AUX"},
292 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
293 {"Boost Mixer", "Mic Volume", "MICP"},
294 {"Boost Mixer", "Aux Volume", "Aux Input"},
296 {"ADC", NULL, "Boost Mixer"},
299 static int wm8940_add_widgets(struct snd_soc_codec *codec)
301 struct snd_soc_dapm_context *dapm = &codec->dapm;
304 ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
305 ARRAY_SIZE(wm8940_dapm_widgets));
308 ret = snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
314 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
316 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
319 struct snd_soc_codec *codec = codec_dai->codec;
320 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
321 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
323 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
324 case SND_SOC_DAIFMT_CBM_CFM:
327 case SND_SOC_DAIFMT_CBS_CFS:
332 snd_soc_write(codec, WM8940_CLOCK, clk);
334 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
335 case SND_SOC_DAIFMT_I2S:
338 case SND_SOC_DAIFMT_LEFT_J:
341 case SND_SOC_DAIFMT_RIGHT_J:
343 case SND_SOC_DAIFMT_DSP_A:
346 case SND_SOC_DAIFMT_DSP_B:
347 iface |= (3 << 3) | (1 << 7);
351 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
352 case SND_SOC_DAIFMT_NB_NF:
354 case SND_SOC_DAIFMT_NB_IF:
357 case SND_SOC_DAIFMT_IB_NF:
360 case SND_SOC_DAIFMT_IB_IF:
361 iface |= (1 << 8) | (1 << 7);
365 snd_soc_write(codec, WM8940_IFACE, iface);
370 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
371 struct snd_pcm_hw_params *params,
372 struct snd_soc_dai *dai)
374 struct snd_soc_codec *codec = dai->codec;
375 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
376 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
377 u16 companding = snd_soc_read(codec,
378 WM8940_COMPANDINGCTL) & 0xFFDF;
382 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
383 && params_channels(params) == 2)
386 switch (params_rate(params)) {
388 addcntrl |= (0x5 << 1);
391 addcntrl |= (0x4 << 1);
394 addcntrl |= (0x3 << 1);
397 addcntrl |= (0x2 << 1);
400 addcntrl |= (0x1 << 1);
406 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
410 switch (params_format(params)) {
411 case SNDRV_PCM_FORMAT_S8:
412 companding = companding | (1 << 5);
414 case SNDRV_PCM_FORMAT_S16_LE:
416 case SNDRV_PCM_FORMAT_S20_3LE:
419 case SNDRV_PCM_FORMAT_S24_LE:
422 case SNDRV_PCM_FORMAT_S32_LE:
426 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
429 ret = snd_soc_write(codec, WM8940_IFACE, iface);
435 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
437 struct snd_soc_codec *codec = dai->codec;
438 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
443 return snd_soc_write(codec, WM8940_DAC, mute_reg);
446 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
447 enum snd_soc_bias_level level)
450 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
454 case SND_SOC_BIAS_ON:
455 /* ensure bufioen and biasen */
456 pwr_reg |= (1 << 2) | (1 << 3);
457 /* Enable thermal shutdown */
458 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
459 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
462 /* set vmid to 75k */
463 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
465 case SND_SOC_BIAS_PREPARE:
466 /* ensure bufioen and biasen */
467 pwr_reg |= (1 << 2) | (1 << 3);
468 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
470 case SND_SOC_BIAS_STANDBY:
471 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
472 ret = snd_soc_cache_sync(codec);
474 dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
479 /* ensure bufioen and biasen */
480 pwr_reg |= (1 << 2) | (1 << 3);
481 /* set vmid to 300k for standby */
482 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
484 case SND_SOC_BIAS_OFF:
485 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
489 codec->dapm.bias_level = level;
495 unsigned int pre_scale:2;
500 static struct pll_ pll_div;
502 /* The size in bits of the pll divide multiplied by 10
503 * to allow rounding later */
504 #define FIXED_PLL_SIZE ((1 << 24) * 10)
505 static void pll_factors(unsigned int target, unsigned int source)
507 unsigned long long Kpart;
508 unsigned int K, Ndiv, Nmod;
509 /* The left shift ist to avoid accuracy loss when right shifting */
510 Ndiv = target / source;
515 pll_div.pre_scale = 0;
516 Ndiv = target / source;
517 } else if (Ndiv < 3) {
520 pll_div.pre_scale = 3;
521 Ndiv = target / source;
522 } else if (Ndiv < 6) {
525 pll_div.pre_scale = 2;
526 Ndiv = target / source;
528 pll_div.pre_scale = 1;
530 if ((Ndiv < 6) || (Ndiv > 12))
532 "WM8940 N value %d outwith recommended range!d\n",
536 Nmod = target % source;
537 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
539 do_div(Kpart, source);
541 K = Kpart & 0xFFFFFFFF;
543 /* Check if we need to round */
547 /* Move down to proper range now rounding is done */
553 /* Untested at the moment */
554 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
555 int source, unsigned int freq_in, unsigned int freq_out)
557 struct snd_soc_codec *codec = codec_dai->codec;
561 reg = snd_soc_read(codec, WM8940_POWER1);
562 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
564 if (freq_in == 0 || freq_out == 0) {
565 /* Clock CODEC directly from MCLK */
566 reg = snd_soc_read(codec, WM8940_CLOCK);
567 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
569 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
573 /* Pll is followed by a frequency divide by 4 */
574 pll_factors(freq_out*4, freq_in);
576 snd_soc_write(codec, WM8940_PLLN,
577 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
578 else /* No factional component */
579 snd_soc_write(codec, WM8940_PLLN,
580 (pll_div.pre_scale << 4) | pll_div.n);
581 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
582 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
583 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
585 reg = snd_soc_read(codec, WM8940_POWER1);
586 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
588 /* Run CODEC from PLL instead of MCLK */
589 reg = snd_soc_read(codec, WM8940_CLOCK);
590 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
595 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
596 int clk_id, unsigned int freq, int dir)
598 struct snd_soc_codec *codec = codec_dai->codec;
599 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
607 wm8940->sysclk = freq;
613 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
616 struct snd_soc_codec *codec = codec_dai->codec;
622 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFE3;
623 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
626 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
627 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
629 case WM8940_OPCLKDIV:
630 reg = snd_soc_read(codec, WM8940_GPIO) & 0xFFCF;
631 ret = snd_soc_write(codec, WM8940_GPIO, reg | (div << 4));
637 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
639 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
640 SNDRV_PCM_FMTBIT_S16_LE | \
641 SNDRV_PCM_FMTBIT_S20_3LE | \
642 SNDRV_PCM_FMTBIT_S24_LE | \
643 SNDRV_PCM_FMTBIT_S32_LE)
645 static const struct snd_soc_dai_ops wm8940_dai_ops = {
646 .hw_params = wm8940_i2s_hw_params,
647 .set_sysclk = wm8940_set_dai_sysclk,
648 .digital_mute = wm8940_mute,
649 .set_fmt = wm8940_set_dai_fmt,
650 .set_clkdiv = wm8940_set_dai_clkdiv,
651 .set_pll = wm8940_set_dai_pll,
654 static struct snd_soc_dai_driver wm8940_dai = {
655 .name = "wm8940-hifi",
657 .stream_name = "Playback",
660 .rates = WM8940_RATES,
661 .formats = WM8940_FORMATS,
664 .stream_name = "Capture",
667 .rates = WM8940_RATES,
668 .formats = WM8940_FORMATS,
670 .ops = &wm8940_dai_ops,
671 .symmetric_rates = 1,
674 static int wm8940_suspend(struct snd_soc_codec *codec)
676 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
679 static int wm8940_resume(struct snd_soc_codec *codec)
681 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
685 static int wm8940_probe(struct snd_soc_codec *codec)
687 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
688 struct wm8940_setup_data *pdata = codec->dev->platform_data;
692 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
694 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
698 ret = wm8940_reset(codec);
700 dev_err(codec->dev, "Failed to issue reset\n");
704 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
706 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
711 dev_warn(codec->dev, "No platform data supplied\n");
713 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
714 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
719 ret = snd_soc_add_codec_controls(codec, wm8940_snd_controls,
720 ARRAY_SIZE(wm8940_snd_controls));
723 ret = wm8940_add_widgets(codec);
727 static int wm8940_remove(struct snd_soc_codec *codec)
729 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
733 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
734 .probe = wm8940_probe,
735 .remove = wm8940_remove,
736 .suspend = wm8940_suspend,
737 .resume = wm8940_resume,
738 .set_bias_level = wm8940_set_bias_level,
739 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
740 .reg_word_size = sizeof(u16),
741 .reg_cache_default = wm8940_reg_defaults,
742 .volatile_register = wm8940_volatile_register,
745 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
746 const struct i2c_device_id *id)
748 struct wm8940_priv *wm8940;
751 wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
756 i2c_set_clientdata(i2c, wm8940);
757 wm8940->control_type = SND_SOC_I2C;
759 ret = snd_soc_register_codec(&i2c->dev,
760 &soc_codec_dev_wm8940, &wm8940_dai, 1);
765 static __devexit int wm8940_i2c_remove(struct i2c_client *client)
767 snd_soc_unregister_codec(&client->dev);
772 static const struct i2c_device_id wm8940_i2c_id[] = {
776 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
778 static struct i2c_driver wm8940_i2c_driver = {
781 .owner = THIS_MODULE,
783 .probe = wm8940_i2c_probe,
784 .remove = __devexit_p(wm8940_i2c_remove),
785 .id_table = wm8940_i2c_id,
788 module_i2c_driver(wm8940_i2c_driver);
790 MODULE_DESCRIPTION("ASoC WM8940 driver");
791 MODULE_AUTHOR("Jonathan Cameron");
792 MODULE_LICENSE("GPL");