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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/wm8974.c

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  1 /*
  2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
  3  *
  4  * Copyright 2006-2009 Wolfson Microelectronics PLC.
  5  *
  6  * Author: Liam Girdwood <Liam.Girdwood@wolfsonmicro.com>
  7  *
  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.
 11  */
 12 
 13 #include <linux/module.h>
 14 #include <linux/moduleparam.h>
 15 #include <linux/kernel.h>
 16 #include <linux/init.h>
 17 #include <linux/delay.h>
 18 #include <linux/pm.h>
 19 #include <linux/i2c.h>
 20 #include <linux/regmap.h>
 21 #include <linux/slab.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/initval.h>
 27 #include <sound/tlv.h>
 28 
 29 #include "wm8974.h"
 30 
 31 static const struct reg_default wm8974_reg_defaults[] = {
 32         {  0, 0x0000 }, {  1, 0x0000 }, {  2, 0x0000 }, {  3, 0x0000 },
 33         {  4, 0x0050 }, {  5, 0x0000 }, {  6, 0x0140 }, {  7, 0x0000 },
 34         {  8, 0x0000 }, {  9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
 35         { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
 36         { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
 37         { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
 38         { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
 39         { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
 40         { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
 41         { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
 42         { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
 43         { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
 44         { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
 45         { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
 46         { 56, 0x0000 },
 47 };
 48 
 49 #define WM8974_POWER1_BIASEN  0x08
 50 #define WM8974_POWER1_BUFIOEN 0x04
 51 
 52 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 53 
 54 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 55 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 56 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 57 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 58 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 59 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 60 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 61 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 62 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 63 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 64 
 65 static const struct soc_enum wm8974_enum[] = {
 66         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 67         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 68         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 69         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 70 
 71         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 72         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 73         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 74         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 75 
 76         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 77         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 78         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 79         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 80 
 81         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 82         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 83 };
 84 
 85 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
 86 
 87 static const struct soc_enum wm8974_auxmode =
 88         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
 89 
 90 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
 91 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 92 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 93 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 94 
 95 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 96 
 97 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 98 
 99 SOC_ENUM("DAC Companding", wm8974_enum[1]),
100 SOC_ENUM("ADC Companding", wm8974_enum[0]),
101 
102 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
103 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
104 
105 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
106 
107 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
108 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
109 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
110 
111 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
112 
113 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
114 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
115 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
116 
117 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
118 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
119 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
120 
121 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
122 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
123 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
124 
125 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
126 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
127 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
128 
129 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
130 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
131 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
132 
133 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
134 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
135 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
136 
137 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
138 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
139 
140 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
141 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
142 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
143 
144 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
145 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
146 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
147 
148 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
149 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
150 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
151 
152 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
153 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
154 
155 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
156 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
157 
158 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
159 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
160 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
161 
162 SOC_ENUM("Aux Mode", wm8974_auxmode),
163 
164 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
165 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
166 
167 /* DAC / ADC oversampling */
168 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
169 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
170 };
171 
172 /* Speaker Output Mixer */
173 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
174 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
175 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
176 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
177 };
178 
179 /* Mono Output Mixer */
180 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
181 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
182 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
183 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
184 };
185 
186 /* Boost mixer */
187 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
188 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
189 };
190 
191 /* Input PGA */
192 static const struct snd_kcontrol_new wm8974_inpga[] = {
193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
194 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
195 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
196 };
197 
198 /* AUX Input boost vol */
199 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
200 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
201 
202 /* Mic Input boost vol */
203 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
204 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
205 
206 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
207 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
208         &wm8974_speaker_mixer_controls[0],
209         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
210 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
211         &wm8974_mono_mixer_controls[0],
212         ARRAY_SIZE(wm8974_mono_mixer_controls)),
213 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
214 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
215 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
216 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
217 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
218 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
219 
220 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
221                    ARRAY_SIZE(wm8974_inpga)),
222 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
223                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
224 
225 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
226 
227 SND_SOC_DAPM_INPUT("MICN"),
228 SND_SOC_DAPM_INPUT("MICP"),
229 SND_SOC_DAPM_INPUT("AUX"),
230 SND_SOC_DAPM_OUTPUT("MONOOUT"),
231 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
232 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
233 };
234 
235 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
236         /* Mono output mixer */
237         {"Mono Mixer", "PCM Playback Switch", "DAC"},
238         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
239         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
240 
241         /* Speaker output mixer */
242         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
243         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
244         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
245 
246         /* Outputs */
247         {"Mono Out", NULL, "Mono Mixer"},
248         {"MONOOUT", NULL, "Mono Out"},
249         {"SpkN Out", NULL, "Speaker Mixer"},
250         {"SpkP Out", NULL, "Speaker Mixer"},
251         {"SPKOUTN", NULL, "SpkN Out"},
252         {"SPKOUTP", NULL, "SpkP Out"},
253 
254         /* Boost Mixer */
255         {"ADC", NULL, "Boost Mixer"},
256         {"Boost Mixer", "Aux Switch", "Aux Input"},
257         {"Boost Mixer", NULL, "Input PGA"},
258         {"Boost Mixer", NULL, "MICP"},
259 
260         /* Input PGA */
261         {"Input PGA", "Aux Switch", "Aux Input"},
262         {"Input PGA", "MicN Switch", "MICN"},
263         {"Input PGA", "MicP Switch", "MICP"},
264 
265         /* Inputs */
266         {"Aux Input", NULL, "AUX"},
267 };
268 
269 struct pll_ {
270         unsigned int pre_div:1;
271         unsigned int n:4;
272         unsigned int k;
273 };
274 
275 /* The size in bits of the pll divide multiplied by 10
276  * to allow rounding later */
277 #define FIXED_PLL_SIZE ((1 << 24) * 10)
278 
279 static void pll_factors(struct pll_ *pll_div,
280                         unsigned int target, unsigned int source)
281 {
282         unsigned long long Kpart;
283         unsigned int K, Ndiv, Nmod;
284 
285         /* There is a fixed divide by 4 in the output path */
286         target *= 4;
287 
288         Ndiv = target / source;
289         if (Ndiv < 6) {
290                 source /= 2;
291                 pll_div->pre_div = 1;
292                 Ndiv = target / source;
293         } else
294                 pll_div->pre_div = 0;
295 
296         if ((Ndiv < 6) || (Ndiv > 12))
297                 printk(KERN_WARNING
298                         "WM8974 N value %u outwith recommended range!\n",
299                         Ndiv);
300 
301         pll_div->n = Ndiv;
302         Nmod = target % source;
303         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
304 
305         do_div(Kpart, source);
306 
307         K = Kpart & 0xFFFFFFFF;
308 
309         /* Check if we need to round */
310         if ((K % 10) >= 5)
311                 K += 5;
312 
313         /* Move down to proper range now rounding is done */
314         K /= 10;
315 
316         pll_div->k = K;
317 }
318 
319 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
320                 int source, unsigned int freq_in, unsigned int freq_out)
321 {
322         struct snd_soc_codec *codec = codec_dai->codec;
323         struct pll_ pll_div;
324         u16 reg;
325 
326         if (freq_in == 0 || freq_out == 0) {
327                 /* Clock CODEC directly from MCLK */
328                 reg = snd_soc_read(codec, WM8974_CLOCK);
329                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
330 
331                 /* Turn off PLL */
332                 reg = snd_soc_read(codec, WM8974_POWER1);
333                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
334                 return 0;
335         }
336 
337         pll_factors(&pll_div, freq_out, freq_in);
338 
339         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
340         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
341         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
342         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
343         reg = snd_soc_read(codec, WM8974_POWER1);
344         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
345 
346         /* Run CODEC from PLL instead of MCLK */
347         reg = snd_soc_read(codec, WM8974_CLOCK);
348         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
349 
350         return 0;
351 }
352 
353 /*
354  * Configure WM8974 clock dividers.
355  */
356 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
357                 int div_id, int div)
358 {
359         struct snd_soc_codec *codec = codec_dai->codec;
360         u16 reg;
361 
362         switch (div_id) {
363         case WM8974_OPCLKDIV:
364                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
365                 snd_soc_write(codec, WM8974_GPIO, reg | div);
366                 break;
367         case WM8974_MCLKDIV:
368                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
369                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
370                 break;
371         case WM8974_BCLKDIV:
372                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
373                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
374                 break;
375         default:
376                 return -EINVAL;
377         }
378 
379         return 0;
380 }
381 
382 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
383                 unsigned int fmt)
384 {
385         struct snd_soc_codec *codec = codec_dai->codec;
386         u16 iface = 0;
387         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
388 
389         /* set master/slave audio interface */
390         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
391         case SND_SOC_DAIFMT_CBM_CFM:
392                 clk |= 0x0001;
393                 break;
394         case SND_SOC_DAIFMT_CBS_CFS:
395                 break;
396         default:
397                 return -EINVAL;
398         }
399 
400         /* interface format */
401         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
402         case SND_SOC_DAIFMT_I2S:
403                 iface |= 0x0010;
404                 break;
405         case SND_SOC_DAIFMT_RIGHT_J:
406                 break;
407         case SND_SOC_DAIFMT_LEFT_J:
408                 iface |= 0x0008;
409                 break;
410         case SND_SOC_DAIFMT_DSP_A:
411                 iface |= 0x00018;
412                 break;
413         default:
414                 return -EINVAL;
415         }
416 
417         /* clock inversion */
418         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
419         case SND_SOC_DAIFMT_NB_NF:
420                 break;
421         case SND_SOC_DAIFMT_IB_IF:
422                 iface |= 0x0180;
423                 break;
424         case SND_SOC_DAIFMT_IB_NF:
425                 iface |= 0x0100;
426                 break;
427         case SND_SOC_DAIFMT_NB_IF:
428                 iface |= 0x0080;
429                 break;
430         default:
431                 return -EINVAL;
432         }
433 
434         snd_soc_write(codec, WM8974_IFACE, iface);
435         snd_soc_write(codec, WM8974_CLOCK, clk);
436         return 0;
437 }
438 
439 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
440                                 struct snd_pcm_hw_params *params,
441                                 struct snd_soc_dai *dai)
442 {
443         struct snd_soc_codec *codec = dai->codec;
444         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
445         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
446 
447         /* bit size */
448         switch (params_format(params)) {
449         case SNDRV_PCM_FORMAT_S16_LE:
450                 break;
451         case SNDRV_PCM_FORMAT_S20_3LE:
452                 iface |= 0x0020;
453                 break;
454         case SNDRV_PCM_FORMAT_S24_LE:
455                 iface |= 0x0040;
456                 break;
457         case SNDRV_PCM_FORMAT_S32_LE:
458                 iface |= 0x0060;
459                 break;
460         }
461 
462         /* filter coefficient */
463         switch (params_rate(params)) {
464         case 8000:
465                 adn |= 0x5 << 1;
466                 break;
467         case 11025:
468                 adn |= 0x4 << 1;
469                 break;
470         case 16000:
471                 adn |= 0x3 << 1;
472                 break;
473         case 22050:
474                 adn |= 0x2 << 1;
475                 break;
476         case 32000:
477                 adn |= 0x1 << 1;
478                 break;
479         case 44100:
480         case 48000:
481                 break;
482         }
483 
484         snd_soc_write(codec, WM8974_IFACE, iface);
485         snd_soc_write(codec, WM8974_ADD, adn);
486         return 0;
487 }
488 
489 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
490 {
491         struct snd_soc_codec *codec = dai->codec;
492         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
493 
494         if (mute)
495                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
496         else
497                 snd_soc_write(codec, WM8974_DAC, mute_reg);
498         return 0;
499 }
500 
501 /* liam need to make this lower power with dapm */
502 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
503         enum snd_soc_bias_level level)
504 {
505         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
506 
507         switch (level) {
508         case SND_SOC_BIAS_ON:
509         case SND_SOC_BIAS_PREPARE:
510                 power1 |= 0x1;  /* VMID 50k */
511                 snd_soc_write(codec, WM8974_POWER1, power1);
512                 break;
513 
514         case SND_SOC_BIAS_STANDBY:
515                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
516 
517                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
518                         regcache_sync(dev_get_regmap(codec->dev, NULL));
519 
520                         /* Initial cap charge at VMID 5k */
521                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
522                         mdelay(100);
523                 }
524 
525                 power1 |= 0x2;  /* VMID 500k */
526                 snd_soc_write(codec, WM8974_POWER1, power1);
527                 break;
528 
529         case SND_SOC_BIAS_OFF:
530                 snd_soc_write(codec, WM8974_POWER1, 0);
531                 snd_soc_write(codec, WM8974_POWER2, 0);
532                 snd_soc_write(codec, WM8974_POWER3, 0);
533                 break;
534         }
535 
536         codec->dapm.bias_level = level;
537         return 0;
538 }
539 
540 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
541 
542 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
543         SNDRV_PCM_FMTBIT_S24_LE)
544 
545 static const struct snd_soc_dai_ops wm8974_ops = {
546         .hw_params = wm8974_pcm_hw_params,
547         .digital_mute = wm8974_mute,
548         .set_fmt = wm8974_set_dai_fmt,
549         .set_clkdiv = wm8974_set_dai_clkdiv,
550         .set_pll = wm8974_set_dai_pll,
551 };
552 
553 static struct snd_soc_dai_driver wm8974_dai = {
554         .name = "wm8974-hifi",
555         .playback = {
556                 .stream_name = "Playback",
557                 .channels_min = 1,
558                 .channels_max = 2,   /* Only 1 channel of data */
559                 .rates = WM8974_RATES,
560                 .formats = WM8974_FORMATS,},
561         .capture = {
562                 .stream_name = "Capture",
563                 .channels_min = 1,
564                 .channels_max = 2,   /* Only 1 channel of data */
565                 .rates = WM8974_RATES,
566                 .formats = WM8974_FORMATS,},
567         .ops = &wm8974_ops,
568         .symmetric_rates = 1,
569 };
570 
571 static int wm8974_suspend(struct snd_soc_codec *codec)
572 {
573         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
574         return 0;
575 }
576 
577 static int wm8974_resume(struct snd_soc_codec *codec)
578 {
579         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
580         return 0;
581 }
582 
583 static const struct regmap_config wm8974_regmap = {
584         .reg_bits = 7,
585         .val_bits = 9,
586 
587         .max_register = WM8974_MONOMIX,
588         .reg_defaults = wm8974_reg_defaults,
589         .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
590         .cache_type = REGCACHE_FLAT,
591 };
592 
593 static int wm8974_probe(struct snd_soc_codec *codec)
594 {
595         int ret = 0;
596 
597         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
598         if (ret < 0) {
599                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
600                 return ret;
601         }
602 
603         ret = wm8974_reset(codec);
604         if (ret < 0) {
605                 dev_err(codec->dev, "Failed to issue reset\n");
606                 return ret;
607         }
608 
609         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
610 
611         return ret;
612 }
613 
614 /* power down chip */
615 static int wm8974_remove(struct snd_soc_codec *codec)
616 {
617         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
618         return 0;
619 }
620 
621 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
622         .probe =        wm8974_probe,
623         .remove =       wm8974_remove,
624         .suspend =      wm8974_suspend,
625         .resume =       wm8974_resume,
626         .set_bias_level = wm8974_set_bias_level,
627 
628         .controls = wm8974_snd_controls,
629         .num_controls = ARRAY_SIZE(wm8974_snd_controls),
630         .dapm_widgets = wm8974_dapm_widgets,
631         .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
632         .dapm_routes = wm8974_dapm_routes,
633         .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
634 };
635 
636 static int wm8974_i2c_probe(struct i2c_client *i2c,
637                             const struct i2c_device_id *id)
638 {
639         struct regmap *regmap;
640         int ret;
641 
642         regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
643         if (IS_ERR(regmap))
644                 return PTR_ERR(regmap);
645 
646         ret = snd_soc_register_codec(&i2c->dev,
647                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
648 
649         return ret;
650 }
651 
652 static int wm8974_i2c_remove(struct i2c_client *client)
653 {
654         snd_soc_unregister_codec(&client->dev);
655 
656         return 0;
657 }
658 
659 static const struct i2c_device_id wm8974_i2c_id[] = {
660         { "wm8974", 0 },
661         { }
662 };
663 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
664 
665 static struct i2c_driver wm8974_i2c_driver = {
666         .driver = {
667                 .name = "wm8974",
668                 .owner = THIS_MODULE,
669         },
670         .probe =    wm8974_i2c_probe,
671         .remove =   wm8974_i2c_remove,
672         .id_table = wm8974_i2c_id,
673 };
674 
675 module_i2c_driver(wm8974_i2c_driver);
676 
677 MODULE_DESCRIPTION("ASoC WM8974 driver");
678 MODULE_AUTHOR("Liam Girdwood");
679 MODULE_LICENSE("GPL");
680 

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