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 enum snd_soc_control_type control_type;
51 static u16 wm8940_reg_defaults[] = {
52 0x8940, /* Soft Reset */
56 0x0010, /* Interface Control */
57 0x0000, /* Companding Control */
58 0x0140, /* Clock Control */
59 0x0000, /* Additional Controls */
60 0x0000, /* GPIO Control */
61 0x0002, /* Auto Increment Control */
62 0x0000, /* DAC Control */
63 0x00FF, /* DAC Volume */
66 0x0100, /* ADC Control */
67 0x00FF, /* ADC Volume */
68 0x0000, /* Notch Filter 1 Control 1 */
69 0x0000, /* Notch Filter 1 Control 2 */
70 0x0000, /* Notch Filter 2 Control 1 */
71 0x0000, /* Notch Filter 2 Control 2 */
72 0x0000, /* Notch Filter 3 Control 1 */
73 0x0000, /* Notch Filter 3 Control 2 */
74 0x0000, /* Notch Filter 4 Control 1 */
75 0x0000, /* Notch Filter 4 Control 2 */
76 0x0032, /* DAC Limit Control 1 */
77 0x0000, /* DAC Limit Control 2 */
84 0x0038, /* ALC Control 1 */
85 0x000B, /* ALC Control 2 */
86 0x0032, /* ALC Control 3 */
87 0x0000, /* Noise Gate */
94 0x0030, /* ALC Control 4 */
96 0x0002, /* Input Control */
97 0x0050, /* PGA Gain */
99 0x0002, /* ADC Boost Control */
101 0x0002, /* Output Control */
102 0x0000, /* Speaker Mixer Control */
106 0x0079, /* Speaker Volume */
108 0x0000, /* Mono Mixer Control */
111 static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
112 static const struct soc_enum wm8940_adc_companding_enum
113 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
114 static const struct soc_enum wm8940_dac_companding_enum
115 = SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
117 static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
118 static const struct soc_enum wm8940_alc_mode_enum
119 = SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
121 static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
122 static const struct soc_enum wm8940_mic_bias_level_enum
123 = SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
125 static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
126 static const struct soc_enum wm8940_filter_mode_enum
127 = SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
129 static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
130 static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
131 static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
132 static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
133 static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
134 static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
135 static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
136 static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
137 static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
138 static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
140 static const struct snd_kcontrol_new wm8940_snd_controls[] = {
141 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
143 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
144 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
146 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
147 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
148 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
149 3, 7, 1, wm8940_alc_max_tlv),
150 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
151 0, 7, 0, wm8940_alc_min_tlv),
152 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
153 0, 14, 0, wm8940_alc_tar_tlv),
154 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
155 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
156 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
157 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
158 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
163 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
164 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
165 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
166 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
167 4, 9, 1, wm8940_lim_thresh_tlv),
168 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
169 0, 12, 0, wm8940_lim_boost_tlv),
171 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
172 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
173 0, 63, 0, wm8940_pga_vol_tlv),
174 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
175 0, 255, 0, wm8940_adc_tlv),
176 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
177 0, 255, 0, wm8940_adc_tlv),
178 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
179 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
180 8, 1, 0, wm8940_capture_boost_vol_tlv),
181 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
182 0, 63, 0, wm8940_spk_vol_tlv),
183 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
185 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
186 8, 1, 1, wm8940_att_tlv),
187 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
189 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
190 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
191 7, 1, 1, wm8940_att_tlv),
193 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
194 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
195 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
196 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
197 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
198 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
199 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
202 static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
203 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
204 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
205 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
208 static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
209 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
210 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
211 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
214 static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
215 static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
216 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
217 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
218 0, 7, 0, wm8940_boost_vol_tlv),
219 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
220 4, 7, 0, wm8940_boost_vol_tlv),
223 static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
224 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
225 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
226 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
229 static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
230 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
231 &wm8940_speaker_mixer_controls[0],
232 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
233 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
234 &wm8940_mono_mixer_controls[0],
235 ARRAY_SIZE(wm8940_mono_mixer_controls)),
236 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
238 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
239 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
240 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
241 SND_SOC_DAPM_OUTPUT("MONOOUT"),
242 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
243 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
245 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
246 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
247 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
248 &wm8940_micpga_controls[0],
249 ARRAY_SIZE(wm8940_micpga_controls)),
250 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
251 &wm8940_input_boost_controls[0],
252 ARRAY_SIZE(wm8940_input_boost_controls)),
253 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
255 SND_SOC_DAPM_INPUT("MICN"),
256 SND_SOC_DAPM_INPUT("MICP"),
257 SND_SOC_DAPM_INPUT("AUX"),
260 static const struct snd_soc_dapm_route audio_map[] = {
261 /* Mono output mixer */
262 {"Mono Mixer", "PCM Playback Switch", "DAC"},
263 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
264 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
266 /* Speaker output mixer */
267 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
268 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
269 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
272 {"Mono Out", NULL, "Mono Mixer"},
273 {"MONOOUT", NULL, "Mono Out"},
274 {"SpkN Out", NULL, "Speaker Mixer"},
275 {"SpkP Out", NULL, "Speaker Mixer"},
276 {"SPKOUTN", NULL, "SpkN Out"},
277 {"SPKOUTP", NULL, "SpkP Out"},
280 {"Mic PGA", "MICN Switch", "MICN"},
281 {"Mic PGA", "MICP Switch", "MICP"},
282 {"Mic PGA", "AUX Switch", "AUX"},
285 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
286 {"Boost Mixer", "Mic Volume", "MICP"},
287 {"Boost Mixer", "Aux Volume", "Aux Input"},
289 {"ADC", NULL, "Boost Mixer"},
292 static int wm8940_add_widgets(struct snd_soc_codec *codec)
294 struct snd_soc_dapm_context *dapm = &codec->dapm;
297 ret = snd_soc_dapm_new_controls(dapm, wm8940_dapm_widgets,
298 ARRAY_SIZE(wm8940_dapm_widgets));
301 ret = snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
309 #define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
311 static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
314 struct snd_soc_codec *codec = codec_dai->codec;
315 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
316 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
318 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
319 case SND_SOC_DAIFMT_CBM_CFM:
322 case SND_SOC_DAIFMT_CBS_CFS:
327 snd_soc_write(codec, WM8940_CLOCK, clk);
329 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
330 case SND_SOC_DAIFMT_I2S:
333 case SND_SOC_DAIFMT_LEFT_J:
336 case SND_SOC_DAIFMT_RIGHT_J:
338 case SND_SOC_DAIFMT_DSP_A:
341 case SND_SOC_DAIFMT_DSP_B:
342 iface |= (3 << 3) | (1 << 7);
346 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
347 case SND_SOC_DAIFMT_NB_NF:
349 case SND_SOC_DAIFMT_NB_IF:
352 case SND_SOC_DAIFMT_IB_NF:
355 case SND_SOC_DAIFMT_IB_IF:
356 iface |= (1 << 8) | (1 << 7);
360 snd_soc_write(codec, WM8940_IFACE, iface);
365 static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
366 struct snd_pcm_hw_params *params,
367 struct snd_soc_dai *dai)
369 struct snd_soc_pcm_runtime *rtd = substream->private_data;
370 struct snd_soc_codec *codec = rtd->codec;
371 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
372 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
373 u16 companding = snd_soc_read(codec,
374 WM8940_COMPANDINGCTL) & 0xFFDF;
378 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
379 && params_channels(params) == 2)
382 switch (params_rate(params)) {
384 addcntrl |= (0x5 << 1);
387 addcntrl |= (0x4 << 1);
390 addcntrl |= (0x3 << 1);
393 addcntrl |= (0x2 << 1);
396 addcntrl |= (0x1 << 1);
402 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
406 switch (params_format(params)) {
407 case SNDRV_PCM_FORMAT_S8:
408 companding = companding | (1 << 5);
410 case SNDRV_PCM_FORMAT_S16_LE:
412 case SNDRV_PCM_FORMAT_S20_3LE:
415 case SNDRV_PCM_FORMAT_S24_LE:
418 case SNDRV_PCM_FORMAT_S32_LE:
422 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
425 ret = snd_soc_write(codec, WM8940_IFACE, iface);
431 static int wm8940_mute(struct snd_soc_dai *dai, int mute)
433 struct snd_soc_codec *codec = dai->codec;
434 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
439 return snd_soc_write(codec, WM8940_DAC, mute_reg);
442 static int wm8940_set_bias_level(struct snd_soc_codec *codec,
443 enum snd_soc_bias_level level)
446 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
450 case SND_SOC_BIAS_ON:
451 /* ensure bufioen and biasen */
452 pwr_reg |= (1 << 2) | (1 << 3);
453 /* Enable thermal shutdown */
454 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
455 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
458 /* set vmid to 75k */
459 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
461 case SND_SOC_BIAS_PREPARE:
462 /* ensure bufioen and biasen */
463 pwr_reg |= (1 << 2) | (1 << 3);
464 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
466 case SND_SOC_BIAS_STANDBY:
467 /* ensure bufioen and biasen */
468 pwr_reg |= (1 << 2) | (1 << 3);
469 /* set vmid to 300k for standby */
470 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
472 case SND_SOC_BIAS_OFF:
473 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
481 unsigned int pre_scale:2;
486 static struct pll_ pll_div;
488 /* The size in bits of the pll divide multiplied by 10
489 * to allow rounding later */
490 #define FIXED_PLL_SIZE ((1 << 24) * 10)
491 static void pll_factors(unsigned int target, unsigned int source)
493 unsigned long long Kpart;
494 unsigned int K, Ndiv, Nmod;
495 /* The left shift ist to avoid accuracy loss when right shifting */
496 Ndiv = target / source;
501 pll_div.pre_scale = 0;
502 Ndiv = target / source;
503 } else if (Ndiv < 3) {
506 pll_div.pre_scale = 3;
507 Ndiv = target / source;
508 } else if (Ndiv < 6) {
511 pll_div.pre_scale = 2;
512 Ndiv = target / source;
514 pll_div.pre_scale = 1;
516 if ((Ndiv < 6) || (Ndiv > 12))
518 "WM8940 N value %d outwith recommended range!d\n",
522 Nmod = target % source;
523 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
525 do_div(Kpart, source);
527 K = Kpart & 0xFFFFFFFF;
529 /* Check if we need to round */
533 /* Move down to proper range now rounding is done */
539 /* Untested at the moment */
540 static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
541 int source, unsigned int freq_in, unsigned int freq_out)
543 struct snd_soc_codec *codec = codec_dai->codec;
547 reg = snd_soc_read(codec, WM8940_POWER1);
548 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
550 if (freq_in == 0 || freq_out == 0) {
551 /* Clock CODEC directly from MCLK */
552 reg = snd_soc_read(codec, WM8940_CLOCK);
553 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
555 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
559 /* Pll is followed by a frequency divide by 4 */
560 pll_factors(freq_out*4, freq_in);
562 snd_soc_write(codec, WM8940_PLLN,
563 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
564 else /* No factional component */
565 snd_soc_write(codec, WM8940_PLLN,
566 (pll_div.pre_scale << 4) | pll_div.n);
567 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
568 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
569 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
571 reg = snd_soc_read(codec, WM8940_POWER1);
572 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
574 /* Run CODEC from PLL instead of MCLK */
575 reg = snd_soc_read(codec, WM8940_CLOCK);
576 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
581 static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
582 int clk_id, unsigned int freq, int dir)
584 struct snd_soc_codec *codec = codec_dai->codec;
585 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
593 wm8940->sysclk = freq;
599 static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
602 struct snd_soc_codec *codec = codec_dai->codec;
608 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
609 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
612 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
613 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
615 case WM8940_OPCLKDIV:
616 reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
617 ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
623 #define WM8940_RATES SNDRV_PCM_RATE_8000_48000
625 #define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
626 SNDRV_PCM_FMTBIT_S16_LE | \
627 SNDRV_PCM_FMTBIT_S20_3LE | \
628 SNDRV_PCM_FMTBIT_S24_LE | \
629 SNDRV_PCM_FMTBIT_S32_LE)
631 static struct snd_soc_dai_ops wm8940_dai_ops = {
632 .hw_params = wm8940_i2s_hw_params,
633 .set_sysclk = wm8940_set_dai_sysclk,
634 .digital_mute = wm8940_mute,
635 .set_fmt = wm8940_set_dai_fmt,
636 .set_clkdiv = wm8940_set_dai_clkdiv,
637 .set_pll = wm8940_set_dai_pll,
640 static struct snd_soc_dai_driver wm8940_dai = {
641 .name = "wm8940-hifi",
643 .stream_name = "Playback",
646 .rates = WM8940_RATES,
647 .formats = WM8940_FORMATS,
650 .stream_name = "Capture",
653 .rates = WM8940_RATES,
654 .formats = WM8940_FORMATS,
656 .ops = &wm8940_dai_ops,
657 .symmetric_rates = 1,
660 static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
662 return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
665 static int wm8940_resume(struct snd_soc_codec *codec)
670 u16 *cache = codec->reg_cache;
672 /* Sync reg_cache with the hardware
673 * Could use auto incremented writes to speed this up
675 for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
677 data[1] = (cache[i] & 0xFF00) >> 8;
678 data[2] = cache[i] & 0x00FF;
679 ret = codec->hw_write(codec->control_data, data, 3);
687 ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
695 static int wm8940_probe(struct snd_soc_codec *codec)
697 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
698 struct wm8940_setup_data *pdata = codec->dev->platform_data;
702 codec->control_data = wm8940->control_data;
703 ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
705 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
709 ret = wm8940_reset(codec);
711 dev_err(codec->dev, "Failed to issue reset\n");
715 wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
717 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
722 dev_warn(codec->dev, "No platform data supplied\n");
724 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
725 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
730 ret = snd_soc_add_controls(codec, wm8940_snd_controls,
731 ARRAY_SIZE(wm8940_snd_controls));
734 ret = wm8940_add_widgets(codec);
742 static int wm8940_remove(struct snd_soc_codec *codec)
744 wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
748 static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
749 .probe = wm8940_probe,
750 .remove = wm8940_remove,
751 .suspend = wm8940_suspend,
752 .resume = wm8940_resume,
753 .set_bias_level = wm8940_set_bias_level,
754 .reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults),
755 .reg_word_size = sizeof(u16),
756 .reg_cache_default = wm8940_reg_defaults,
759 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
760 static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
761 const struct i2c_device_id *id)
763 struct wm8940_priv *wm8940;
766 wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
770 i2c_set_clientdata(i2c, wm8940);
771 wm8940->control_data = i2c;
773 ret = snd_soc_register_codec(&i2c->dev,
774 &soc_codec_dev_wm8940, &wm8940_dai, 1);
780 static __devexit int wm8940_i2c_remove(struct i2c_client *client)
782 snd_soc_unregister_codec(&client->dev);
783 kfree(i2c_get_clientdata(client));
787 static const struct i2c_device_id wm8940_i2c_id[] = {
791 MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
793 static struct i2c_driver wm8940_i2c_driver = {
795 .name = "wm8940-codec",
796 .owner = THIS_MODULE,
798 .probe = wm8940_i2c_probe,
799 .remove = __devexit_p(wm8940_i2c_remove),
800 .id_table = wm8940_i2c_id,
804 static int __init wm8940_modinit(void)
807 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
808 ret = i2c_add_driver(&wm8940_i2c_driver);
810 printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
816 module_init(wm8940_modinit);
818 static void __exit wm8940_exit(void)
820 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
821 i2c_del_driver(&wm8940_i2c_driver);
824 module_exit(wm8940_exit);
826 MODULE_DESCRIPTION("ASoC WM8940 driver");
827 MODULE_AUTHOR("Jonathan Cameron");
828 MODULE_LICENSE("GPL");