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/platform_device.h>
32 #include <linux/spi/spi.h>
33 #include <linux/slab.h>
34 #include <sound/core.h>
35 #include <sound/pcm.h>
36 #include <sound/pcm_params.h>
37 #include <sound/soc.h>
38 #include <sound/soc-dapm.h>
39 #include <sound/initval.h>
40 #include <sound/tlv.h>
46 u16 reg_cache[WM8940_CACHEREGNUM];
47 struct snd_soc_codec codec;
50 static u16 wm8940_reg_defaults[] = {
51 0x8940, /* Soft Reset */
55 0x0010, /* Interface Control */
56 0x0000, /* Companding Control */
57 0x0140, /* Clock Control */
58 0x0000, /* Additional Controls */
59 0x0000, /* GPIO Control */
60 0x0002, /* Auto Increment Control */
61 0x0000, /* DAC Control */
62 0x00FF, /* DAC Volume */
65 0x0100, /* ADC Control */
66 0x00FF, /* ADC Volume */
67 0x0000, /* Notch Filter 1 Control 1 */
68 0x0000, /* Notch Filter 1 Control 2 */
69 0x0000, /* Notch Filter 2 Control 1 */
70 0x0000, /* Notch Filter 2 Control 2 */
71 0x0000, /* Notch Filter 3 Control 1 */
72 0x0000, /* Notch Filter 3 Control 2 */
73 0x0000, /* Notch Filter 4 Control 1 */
74 0x0000, /* Notch Filter 4 Control 2 */
75 0x0032, /* DAC Limit Control 1 */
76 0x0000, /* DAC Limit Control 2 */
83 0x0038, /* ALC Control 1 */
84 0x000B, /* ALC Control 2 */
85 0x0032, /* ALC Control 3 */
86 0x0000, /* Noise Gate */
93 0x0030, /* ALC Control 4 */
95 0x0002, /* Input Control */
96 0x0050, /* PGA Gain */
98 0x0002, /* ADC Boost Control */
100 0x0002, /* Output Control */
101 0x0000, /* Speaker Mixer Control */
105 0x0079, /* Speaker Volume */
107 0x0000, /* Mono Mixer Control */
110 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
111 static const struct soc_enum wm8940_adc_companding_enum
112 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
113 static const struct soc_enum wm8940_dac_companding_enum
114 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
116 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
117 static const struct soc_enum wm8940_alc_mode_enum
118 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
120 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
121 static const struct soc_enum wm8940_mic_bias_level_enum
122 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
124 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
125 static const struct soc_enum wm8940_filter_mode_enum
126 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
128 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
129 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
130 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
131 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
132 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
133 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
134 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
135 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
136 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
137 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
139 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
140 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
142 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
143 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
145 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
146 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
147 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
148 3, 7, 1, wm8940_alc_max_tlv),
149 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
150 0, 7, 0, wm8940_alc_min_tlv),
151 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
152 0, 14, 0, wm8940_alc_tar_tlv),
153 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
154 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
155 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
156 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
157 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
159 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
162 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
163 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
164 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
165 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
166 4, 9, 1, wm8940_lim_thresh_tlv),
167 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
168 0, 12, 0, wm8940_lim_boost_tlv),
170 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
171 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
172 0, 63, 0, wm8940_pga_vol_tlv),
173 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
174 0, 255, 0, wm8940_adc_tlv),
175 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
176 0, 255, 0, wm8940_adc_tlv),
177 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
178 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
179 8, 1, 0, wm8940_capture_boost_vol_tlv),
180 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
181 0, 63, 0, wm8940_spk_vol_tlv),
182 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
184 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
185 8, 1, 1, wm8940_att_tlv),
186 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
188 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
189 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
190 7, 1, 1, wm8940_att_tlv),
192 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
193 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
194 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
195 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
196 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
197 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
198 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
201 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
202 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
203 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
204 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
207 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
208 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
209 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
210 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
213 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
214 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
215 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
216 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
217 0, 7, 0, wm8940_boost_vol_tlv),
218 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
219 4, 7, 0, wm8940_boost_vol_tlv),
222 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
223 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
224 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
225 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
228 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
229 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
230 &wm8940_speaker_mixer_controls[0],
231 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
232 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
233 &wm8940_mono_mixer_controls[0],
234 ARRAY_SIZE(wm8940_mono_mixer_controls)),
235 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
237 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
238 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
239 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
240 SND_SOC_DAPM_OUTPUT("MONOOUT"),
241 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
242 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
244 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
245 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
246 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
247 &wm8940_micpga_controls[0],
248 ARRAY_SIZE(wm8940_micpga_controls)),
249 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
250 &wm8940_input_boost_controls[0],
251 ARRAY_SIZE(wm8940_input_boost_controls)),
252 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
254 SND_SOC_DAPM_INPUT("MICN"),
255 SND_SOC_DAPM_INPUT("MICP"),
256 SND_SOC_DAPM_INPUT("AUX"),
259 static const struct snd_soc_dapm_route audio_map[] = {
260 /* Mono output mixer */
261 {"Mono Mixer", "PCM Playback Switch", "DAC"},
262 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
263 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
265 /* Speaker output mixer */
266 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
267 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
268 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
271 {"Mono Out", NULL, "Mono Mixer"},
272 {"MONOOUT", NULL, "Mono Out"},
273 {"SpkN Out", NULL, "Speaker Mixer"},
274 {"SpkP Out", NULL, "Speaker Mixer"},
275 {"SPKOUTN", NULL, "SpkN Out"},
276 {"SPKOUTP", NULL, "SpkP Out"},
279 {"Mic PGA", "MICN Switch", "MICN"},
280 {"Mic PGA", "MICP Switch", "MICP"},
281 {"Mic PGA", "AUX Switch", "AUX"},
284 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
285 {"Boost Mixer", "Mic Volume", "MICP"},
286 {"Boost Mixer", "Aux Volume", "Aux Input"},
288 {"ADC", NULL, "Boost Mixer"},
291 static int wm8940_add_widgets(struct snd_soc_codec *codec)
295 ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
296 ARRAY_SIZE(wm8940_dapm_widgets));
299 ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
307 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
309 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
312 struct snd_soc_codec *codec = codec_dai->codec;
313 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
314 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
316 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
317 case SND_SOC_DAIFMT_CBM_CFM:
320 case SND_SOC_DAIFMT_CBS_CFS:
325 snd_soc_write(codec, WM8940_CLOCK, clk);
327 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
328 case SND_SOC_DAIFMT_I2S:
331 case SND_SOC_DAIFMT_LEFT_J:
334 case SND_SOC_DAIFMT_RIGHT_J:
336 case SND_SOC_DAIFMT_DSP_A:
339 case SND_SOC_DAIFMT_DSP_B:
340 iface |= (3 << 3) | (1 << 7);
344 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
345 case SND_SOC_DAIFMT_NB_NF:
347 case SND_SOC_DAIFMT_NB_IF:
350 case SND_SOC_DAIFMT_IB_NF:
353 case SND_SOC_DAIFMT_IB_IF:
354 iface |= (1 << 8) | (1 << 7);
358 snd_soc_write(codec, WM8940_IFACE, iface);
363 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
364 struct snd_pcm_hw_params *params,
365 struct snd_soc_dai *dai)
367 struct snd_soc_pcm_runtime *rtd = substream->private_data;
368 struct snd_soc_device *socdev = rtd->socdev;
369 struct snd_soc_codec *codec = socdev->card->codec;
370 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
371 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
372 u16 companding = snd_soc_read(codec,
373 WM8940_COMPANDINGCTL) & 0xFFDF;
377 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
378 && params_channels(params) == 2)
381 switch (params_rate(params)) {
383 addcntrl |= (0x5 << 1);
386 addcntrl |= (0x4 << 1);
389 addcntrl |= (0x3 << 1);
392 addcntrl |= (0x2 << 1);
395 addcntrl |= (0x1 << 1);
401 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
405 switch (params_format(params)) {
406 case SNDRV_PCM_FORMAT_S8:
407 companding = companding | (1 << 5);
409 case SNDRV_PCM_FORMAT_S16_LE:
411 case SNDRV_PCM_FORMAT_S20_3LE:
414 case SNDRV_PCM_FORMAT_S24_LE:
417 case SNDRV_PCM_FORMAT_S32_LE:
421 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
424 ret = snd_soc_write(codec, WM8940_IFACE, iface);
430 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
432 struct snd_soc_codec *codec = dai->codec;
433 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
438 return snd_soc_write(codec, WM8940_DAC, mute_reg);
441 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
442 enum snd_soc_bias_level level)
445 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
449 case SND_SOC_BIAS_ON:
450 /* ensure bufioen and biasen */
451 pwr_reg |= (1 << 2) | (1 << 3);
452 /* Enable thermal shutdown */
453 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
454 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
457 /* set vmid to 75k */
458 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
460 case SND_SOC_BIAS_PREPARE:
461 /* ensure bufioen and biasen */
462 pwr_reg |= (1 << 2) | (1 << 3);
463 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
465 case SND_SOC_BIAS_STANDBY:
466 /* ensure bufioen and biasen */
467 pwr_reg |= (1 << 2) | (1 << 3);
468 /* set vmid to 300k for standby */
469 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
471 case SND_SOC_BIAS_OFF:
472 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
480 unsigned int pre_scale:2;
485 static struct pll_ pll_div;
487 /* The size in bits of the pll divide multiplied by 10
488 * to allow rounding later */
489 #define FIXED_PLL_SIZE ((1 << 24) * 10)
490 static void pll_factors(unsigned int target, unsigned int source)
492 unsigned long long Kpart;
493 unsigned int K, Ndiv, Nmod;
494 /* The left shift ist to avoid accuracy loss when right shifting */
495 Ndiv = target / source;
500 pll_div.pre_scale = 0;
501 Ndiv = target / source;
502 } else if (Ndiv < 3) {
505 pll_div.pre_scale = 3;
506 Ndiv = target / source;
507 } else if (Ndiv < 6) {
510 pll_div.pre_scale = 2;
511 Ndiv = target / source;
513 pll_div.pre_scale = 1;
515 if ((Ndiv < 6) || (Ndiv > 12))
517 "WM8940 N value %d outwith recommended range!d\n",
521 Nmod = target % source;
522 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
524 do_div(Kpart, source);
526 K = Kpart & 0xFFFFFFFF;
528 /* Check if we need to round */
532 /* Move down to proper range now rounding is done */
538 /* Untested at the moment */
539 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
540 int source, unsigned int freq_in, unsigned int freq_out)
542 struct snd_soc_codec *codec = codec_dai->codec;
546 reg = snd_soc_read(codec, WM8940_POWER1);
547 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
549 if (freq_in == 0 || freq_out == 0) {
550 /* Clock CODEC directly from MCLK */
551 reg = snd_soc_read(codec, WM8940_CLOCK);
552 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
554 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
558 /* Pll is followed by a frequency divide by 4 */
559 pll_factors(freq_out*4, freq_in);
561 snd_soc_write(codec, WM8940_PLLN,
562 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
563 else /* No factional component */
564 snd_soc_write(codec, WM8940_PLLN,
565 (pll_div.pre_scale << 4) | pll_div.n);
566 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
567 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
568 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
570 reg = snd_soc_read(codec, WM8940_POWER1);
571 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
573 /* Run CODEC from PLL instead of MCLK */
574 reg = snd_soc_read(codec, WM8940_CLOCK);
575 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
580 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
581 int clk_id, unsigned int freq, int dir)
583 struct snd_soc_codec *codec = codec_dai->codec;
584 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
592 wm8940->sysclk = freq;
598 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
601 struct snd_soc_codec *codec = codec_dai->codec;
607 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
608 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
611 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
612 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
614 case WM8940_OPCLKDIV:
615 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
616 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
622 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
624 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
625 SNDRV_PCM_FMTBIT_S16_LE | \
626 SNDRV_PCM_FMTBIT_S20_3LE | \
627 SNDRV_PCM_FMTBIT_S24_LE | \
628 SNDRV_PCM_FMTBIT_S32_LE)
630 static struct snd_soc_dai_ops wm8940_dai_ops = {
631 .hw_params = wm8940_i2s_hw_params,
632 .set_sysclk = wm8940_set_dai_sysclk,
633 .digital_mute = wm8940_mute,
634 .set_fmt = wm8940_set_dai_fmt,
635 .set_clkdiv = wm8940_set_dai_clkdiv,
636 .set_pll = wm8940_set_dai_pll,
639 struct snd_soc_dai wm8940_dai = {
642 .stream_name = "Playback",
645 .rates = WM8940_RATES,
646 .formats = WM8940_FORMATS,
649 .stream_name = "Capture",
652 .rates = WM8940_RATES,
653 .formats = WM8940_FORMATS,
655 .ops = &wm8940_dai_ops,
656 .symmetric_rates = 1,
658 EXPORT_SYMBOL_GPL(wm8940_dai);
660 static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
662 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
663 struct snd_soc_codec *codec = socdev->card->codec;
665 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
668 static int wm8940_resume(struct platform_device *pdev)
670 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
671 struct snd_soc_codec *codec = socdev->card->codec;
675 u16 *cache = codec->reg_cache;
677 /* Sync reg_cache with the hardware
678 * Could use auto incremented writes to speed this up
680 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
682 data[1] = (cache[i] & 0xFF00) >> 8;
683 data[2] = cache[i] & 0x00FF;
684 ret = codec->hw_write(codec->control_data, data, 3);
692 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
700 static struct snd_soc_codec *wm8940_codec;
702 static int wm8940_probe(struct platform_device *pdev)
704 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
705 struct snd_soc_codec *codec;
709 if (wm8940_codec == NULL) {
710 dev_err(&pdev->dev, "Codec device not registered\n");
714 socdev->card->codec = wm8940_codec;
715 codec = wm8940_codec;
717 mutex_init(&codec->mutex);
719 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
721 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
725 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
726 ARRAY_SIZE(wm8940_snd_controls));
728 goto error_free_pcms;
729 ret = wm8940_add_widgets(codec);
731 goto error_free_pcms;
736 snd_soc_free_pcms(socdev);
737 snd_soc_dapm_free(socdev);
742 static int wm8940_remove(struct platform_device *pdev)
744 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
746 snd_soc_free_pcms(socdev);
747 snd_soc_dapm_free(socdev);
752 struct snd_soc_codec_device soc_codec_dev_wm8940 = {
753 .probe = wm8940_probe,
754 .remove = wm8940_remove,
755 .suspend = wm8940_suspend,
756 .resume = wm8940_resume,
758 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
760 static int wm8940_register(struct wm8940_priv *wm8940,
761 enum snd_soc_control_type control)
763 struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
764 struct snd_soc_codec *codec = &wm8940->codec;
768 dev_err(codec->dev, "Another WM8940 is registered\n");
772 INIT_LIST_HEAD(&codec->dapm_widgets);
773 INIT_LIST_HEAD(&codec->dapm_paths);
775 snd_soc_codec_set_drvdata(codec, wm8940);
776 codec->name = "WM8940";
777 codec->owner = THIS_MODULE;
778 codec->bias_level = SND_SOC_BIAS_OFF;
779 codec->set_bias_level = wm8940_set_bias_level;
780 codec->dai = &wm8940_dai;
782 codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
783 codec->reg_cache = &wm8940->reg_cache;
785 ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
787 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
791 memcpy(codec->reg_cache, wm8940_reg_defaults,
792 sizeof(wm8940_reg_defaults));
794 ret = wm8940_reset(codec);
796 dev_err(codec->dev, "Failed to issue reset\n");
800 wm8940_dai.dev = codec->dev;
802 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
804 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
809 dev_warn(codec->dev, "No platform data supplied\n");
811 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
812 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
818 wm8940_codec = codec;
820 ret = snd_soc_register_codec(codec);
822 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
826 ret = snd_soc_register_dai(&wm8940_dai);
828 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
829 snd_soc_unregister_codec(codec);
836 static void wm8940_unregister(struct wm8940_priv *wm8940)
838 wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
839 snd_soc_unregister_dai(&wm8940_dai);
840 snd_soc_unregister_codec(&wm8940->codec);
845 static int wm8940_i2c_probe(struct i2c_client *i2c,
846 const struct i2c_device_id *id)
849 struct wm8940_priv *wm8940;
850 struct snd_soc_codec *codec;
852 wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
856 codec = &wm8940->codec;
857 codec->hw_write = (hw_write_t)i2c_master_send;
858 i2c_set_clientdata(i2c, wm8940);
859 codec->control_data = i2c;
860 codec->dev = &i2c->dev;
862 ret = wm8940_register(wm8940, SND_SOC_I2C);
869 static int __devexit wm8940_i2c_remove(struct i2c_client *client)
871 struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
873 wm8940_unregister(wm8940);
878 static const struct i2c_device_id wm8940_i2c_id[] = {
882 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
884 static struct i2c_driver wm8940_i2c_driver = {
886 .name = "WM8940 I2C Codec",
887 .owner = THIS_MODULE,
889 .probe = wm8940_i2c_probe,
890 .remove = __devexit_p(wm8940_i2c_remove),
891 .id_table = wm8940_i2c_id,
894 static int __init wm8940_modinit(void)
898 ret = i2c_add_driver(&wm8940_i2c_driver);
900 printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
904 module_init(wm8940_modinit);
906 static void __exit wm8940_exit(void)
908 i2c_del_driver(&wm8940_i2c_driver);
910 module_exit(wm8940_exit);
912 MODULE_DESCRIPTION("ASoC WM8940 driver");
913 MODULE_AUTHOR("Jonathan Cameron");
914 MODULE_LICENSE("GPL");