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/initval.h>
39 #include <sound/tlv.h>
45 enum snd_soc_control_type control_type;
49 static u16 wm8940_reg_defaults[] = {
50 0x8940, /* Soft Reset */
54 0x0010, /* Interface Control */
55 0x0000, /* Companding Control */
56 0x0140, /* Clock Control */
57 0x0000, /* Additional Controls */
58 0x0000, /* GPIO Control */
59 0x0002, /* Auto Increment Control */
60 0x0000, /* DAC Control */
61 0x00FF, /* DAC Volume */
64 0x0100, /* ADC Control */
65 0x00FF, /* ADC Volume */
66 0x0000, /* Notch Filter 1 Control 1 */
67 0x0000, /* Notch Filter 1 Control 2 */
68 0x0000, /* Notch Filter 2 Control 1 */
69 0x0000, /* Notch Filter 2 Control 2 */
70 0x0000, /* Notch Filter 3 Control 1 */
71 0x0000, /* Notch Filter 3 Control 2 */
72 0x0000, /* Notch Filter 4 Control 1 */
73 0x0000, /* Notch Filter 4 Control 2 */
74 0x0032, /* DAC Limit Control 1 */
75 0x0000, /* DAC Limit Control 2 */
82 0x0038, /* ALC Control 1 */
83 0x000B, /* ALC Control 2 */
84 0x0032, /* ALC Control 3 */
85 0x0000, /* Noise Gate */
92 0x0030, /* ALC Control 4 */
94 0x0002, /* Input Control */
95 0x0050, /* PGA Gain */
97 0x0002, /* ADC Boost Control */
99 0x0002, /* Output Control */
100 0x0000, /* Speaker Mixer Control */
104 0x0079, /* Speaker Volume */
106 0x0000, /* Mono Mixer Control */
109 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
110 static const struct soc_enum wm8940_adc_companding_enum
111 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
112 static const struct soc_enum wm8940_dac_companding_enum
113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
115 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
116 static const struct soc_enum wm8940_alc_mode_enum
117 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
119 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
120 static const struct soc_enum wm8940_mic_bias_level_enum
121 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
123 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
124 static const struct soc_enum wm8940_filter_mode_enum
125 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
127 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
128 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
129 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
130 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
131 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
132 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
133 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
134 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
135 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
136 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
138 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
139 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
141 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
142 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
144 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
145 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
146 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
147 3, 7, 1, wm8940_alc_max_tlv),
148 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
149 0, 7, 0, wm8940_alc_min_tlv),
150 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
151 0, 14, 0, wm8940_alc_tar_tlv),
152 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
153 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
154 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
155 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
156 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
161 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
162 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
163 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
164 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
165 4, 9, 1, wm8940_lim_thresh_tlv),
166 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
167 0, 12, 0, wm8940_lim_boost_tlv),
169 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
170 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
171 0, 63, 0, wm8940_pga_vol_tlv),
172 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
173 0, 255, 0, wm8940_adc_tlv),
174 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
175 0, 255, 0, wm8940_adc_tlv),
176 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
177 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
178 8, 1, 0, wm8940_capture_boost_vol_tlv),
179 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
180 0, 63, 0, wm8940_spk_vol_tlv),
181 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
183 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
184 8, 1, 1, wm8940_att_tlv),
185 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
187 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
188 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
189 7, 1, 1, wm8940_att_tlv),
191 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
192 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
193 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
194 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
195 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
196 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
197 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
200 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
201 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
202 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
203 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
206 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
207 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
208 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
209 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
212 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
213 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
214 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
215 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
216 0, 7, 0, wm8940_boost_vol_tlv),
217 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
218 4, 7, 0, wm8940_boost_vol_tlv),
221 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
222 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
223 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
224 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
227 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
228 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
229 &wm8940_speaker_mixer_controls[0],
230 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
231 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
232 &wm8940_mono_mixer_controls[0],
233 ARRAY_SIZE(wm8940_mono_mixer_controls)),
234 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
236 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
237 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
238 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
239 SND_SOC_DAPM_OUTPUT("MONOOUT"),
240 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
241 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
243 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
244 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
245 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
246 &wm8940_micpga_controls[0],
247 ARRAY_SIZE(wm8940_micpga_controls)),
248 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
249 &wm8940_input_boost_controls[0],
250 ARRAY_SIZE(wm8940_input_boost_controls)),
251 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
253 SND_SOC_DAPM_INPUT("MICN"),
254 SND_SOC_DAPM_INPUT("MICP"),
255 SND_SOC_DAPM_INPUT("AUX"),
258 static const struct snd_soc_dapm_route audio_map[] = {
259 /* Mono output mixer */
260 {"Mono Mixer", "PCM Playback Switch", "DAC"},
261 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
262 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
264 /* Speaker output mixer */
265 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
266 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
267 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
270 {"Mono Out", NULL, "Mono Mixer"},
271 {"MONOOUT", NULL, "Mono Out"},
272 {"SpkN Out", NULL, "Speaker Mixer"},
273 {"SpkP Out", NULL, "Speaker Mixer"},
274 {"SPKOUTN", NULL, "SpkN Out"},
275 {"SPKOUTP", NULL, "SpkP Out"},
278 {"Mic PGA", "MICN Switch", "MICN"},
279 {"Mic PGA", "MICP Switch", "MICP"},
280 {"Mic PGA", "AUX Switch", "AUX"},
283 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
284 {"Boost Mixer", "Mic Volume", "MICP"},
285 {"Boost Mixer", "Aux Volume", "Aux Input"},
287 {"ADC", NULL, "Boost Mixer"},
290 static int wm8940_add_widgets(struct snd_soc_codec *codec)
292 struct snd_soc_dapm_context *dapm = &codec->dapm;
295 ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
296 ARRAY_SIZE(wm8940_dapm_widgets));
299 ret = snd_soc_dapm_add_routes(dapm, 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_codec *codec = rtd->codec;
369 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
370 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
371 u16 companding = snd_soc_read(codec,
372 WM8940_COMPANDINGCTL) & 0xFFDF;
376 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
377 && params_channels(params) == 2)
380 switch (params_rate(params)) {
382 addcntrl |= (0x5 << 1);
385 addcntrl |= (0x4 << 1);
388 addcntrl |= (0x3 << 1);
391 addcntrl |= (0x2 << 1);
394 addcntrl |= (0x1 << 1);
400 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
404 switch (params_format(params)) {
405 case SNDRV_PCM_FORMAT_S8:
406 companding = companding | (1 << 5);
408 case SNDRV_PCM_FORMAT_S16_LE:
410 case SNDRV_PCM_FORMAT_S20_3LE:
413 case SNDRV_PCM_FORMAT_S24_LE:
416 case SNDRV_PCM_FORMAT_S32_LE:
420 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
423 ret = snd_soc_write(codec, WM8940_IFACE, iface);
429 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
431 struct snd_soc_codec *codec = dai->codec;
432 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
437 return snd_soc_write(codec, WM8940_DAC, mute_reg);
440 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
441 enum snd_soc_bias_level level)
444 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
448 case SND_SOC_BIAS_ON:
449 /* ensure bufioen and biasen */
450 pwr_reg |= (1 << 2) | (1 << 3);
451 /* Enable thermal shutdown */
452 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
453 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
456 /* set vmid to 75k */
457 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
459 case SND_SOC_BIAS_PREPARE:
460 /* ensure bufioen and biasen */
461 pwr_reg |= (1 << 2) | (1 << 3);
462 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
464 case SND_SOC_BIAS_STANDBY:
465 /* ensure bufioen and biasen */
466 pwr_reg |= (1 << 2) | (1 << 3);
467 /* set vmid to 300k for standby */
468 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
470 case SND_SOC_BIAS_OFF:
471 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
479 unsigned int pre_scale:2;
484 static struct pll_ pll_div;
486 /* The size in bits of the pll divide multiplied by 10
487 * to allow rounding later */
488 #define FIXED_PLL_SIZE ((1 << 24) * 10)
489 static void pll_factors(unsigned int target, unsigned int source)
491 unsigned long long Kpart;
492 unsigned int K, Ndiv, Nmod;
493 /* The left shift ist to avoid accuracy loss when right shifting */
494 Ndiv = target / source;
499 pll_div.pre_scale = 0;
500 Ndiv = target / source;
501 } else if (Ndiv < 3) {
504 pll_div.pre_scale = 3;
505 Ndiv = target / source;
506 } else if (Ndiv < 6) {
509 pll_div.pre_scale = 2;
510 Ndiv = target / source;
512 pll_div.pre_scale = 1;
514 if ((Ndiv < 6) || (Ndiv > 12))
516 "WM8940 N value %d outwith recommended range!d\n",
520 Nmod = target % source;
521 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
523 do_div(Kpart, source);
525 K = Kpart & 0xFFFFFFFF;
527 /* Check if we need to round */
531 /* Move down to proper range now rounding is done */
537 /* Untested at the moment */
538 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
539 int source, unsigned int freq_in, unsigned int freq_out)
541 struct snd_soc_codec *codec = codec_dai->codec;
545 reg = snd_soc_read(codec, WM8940_POWER1);
546 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
548 if (freq_in == 0 || freq_out == 0) {
549 /* Clock CODEC directly from MCLK */
550 reg = snd_soc_read(codec, WM8940_CLOCK);
551 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
553 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
557 /* Pll is followed by a frequency divide by 4 */
558 pll_factors(freq_out*4, freq_in);
560 snd_soc_write(codec, WM8940_PLLN,
561 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
562 else /* No factional component */
563 snd_soc_write(codec, WM8940_PLLN,
564 (pll_div.pre_scale << 4) | pll_div.n);
565 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
566 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
567 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
569 reg = snd_soc_read(codec, WM8940_POWER1);
570 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
572 /* Run CODEC from PLL instead of MCLK */
573 reg = snd_soc_read(codec, WM8940_CLOCK);
574 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
579 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
580 int clk_id, unsigned int freq, int dir)
582 struct snd_soc_codec *codec = codec_dai->codec;
583 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
591 wm8940->sysclk = freq;
597 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
600 struct snd_soc_codec *codec = codec_dai->codec;
606 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
607 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
610 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
611 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
613 case WM8940_OPCLKDIV:
614 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
615 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
621 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
623 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
624 SNDRV_PCM_FMTBIT_S16_LE | \
625 SNDRV_PCM_FMTBIT_S20_3LE | \
626 SNDRV_PCM_FMTBIT_S24_LE | \
627 SNDRV_PCM_FMTBIT_S32_LE)
629 static struct snd_soc_dai_ops wm8940_dai_ops = {
630 .hw_params = wm8940_i2s_hw_params,
631 .set_sysclk = wm8940_set_dai_sysclk,
632 .digital_mute = wm8940_mute,
633 .set_fmt = wm8940_set_dai_fmt,
634 .set_clkdiv = wm8940_set_dai_clkdiv,
635 .set_pll = wm8940_set_dai_pll,
638 static struct snd_soc_dai_driver wm8940_dai = {
639 .name = "wm8940-hifi",
641 .stream_name = "Playback",
644 .rates = WM8940_RATES,
645 .formats = WM8940_FORMATS,
648 .stream_name = "Capture",
651 .rates = WM8940_RATES,
652 .formats = WM8940_FORMATS,
654 .ops = &wm8940_dai_ops,
655 .symmetric_rates = 1,
658 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
660 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
663 static int wm8940_resume(struct snd_soc_codec *codec)
668 u16 *cache = codec->reg_cache;
670 /* Sync reg_cache with the hardware
671 * Could use auto incremented writes to speed this up
673 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
675 data[1] = (cache[i] & 0xFF00) >> 8;
676 data[2] = cache[i] & 0x00FF;
677 ret = codec->hw_write(codec->control_data, data, 3);
685 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
693 static int wm8940_probe(struct snd_soc_codec *codec)
695 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
696 struct wm8940_setup_data *pdata = codec->dev->platform_data;
700 codec->control_data = wm8940->control_data;
701 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
703 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
707 ret = wm8940_reset(codec);
709 dev_err(codec->dev, "Failed to issue reset\n");
713 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
715 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
720 dev_warn(codec->dev, "No platform data supplied\n");
722 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
723 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
728 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
729 ARRAY_SIZE(wm8940_snd_controls));
732 ret = wm8940_add_widgets(codec);
739 static int wm8940_remove(struct snd_soc_codec *codec)
741 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
745 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
746 .probe = wm8940_probe,
747 .remove = wm8940_remove,
748 .suspend = wm8940_suspend,
749 .resume = wm8940_resume,
750 .set_bias_level = wm8940_set_bias_level,
751 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
752 .reg_word_size = sizeof(u16),
753 .reg_cache_default = wm8940_reg_defaults,
756 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
757 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
758 const struct i2c_device_id *id)
760 struct wm8940_priv *wm8940;
763 wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
767 i2c_set_clientdata(i2c, wm8940);
768 wm8940->control_data = i2c;
769 wm8940->control_type = SND_SOC_I2C;
771 ret = snd_soc_register_codec(&i2c->dev,
772 &soc_codec_dev_wm8940, &wm8940_dai, 1);
778 static __devexit int wm8940_i2c_remove(struct i2c_client *client)
780 snd_soc_unregister_codec(&client->dev);
781 kfree(i2c_get_clientdata(client));
785 static const struct i2c_device_id wm8940_i2c_id[] = {
789 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
791 static struct i2c_driver wm8940_i2c_driver = {
793 .name = "wm8940-codec",
794 .owner = THIS_MODULE,
796 .probe = wm8940_i2c_probe,
797 .remove = __devexit_p(wm8940_i2c_remove),
798 .id_table = wm8940_i2c_id,
802 static int __init wm8940_modinit(void)
805 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
806 ret = i2c_add_driver(&wm8940_i2c_driver);
808 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
814 module_init(wm8940_modinit);
816 static void __exit wm8940_exit(void)
818 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
819 i2c_del_driver(&wm8940_i2c_driver);
822 module_exit(wm8940_exit);
824 MODULE_DESCRIPTION("ASoC WM8940 driver");
825 MODULE_AUTHOR("Jonathan Cameron");
826 MODULE_LICENSE("GPL");