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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 struct wm8974_priv {
 32         unsigned int mclk;
 33         unsigned int fs;
 34 };
 35 
 36 static const struct reg_default wm8974_reg_defaults[] = {
 37         {  0, 0x0000 }, {  1, 0x0000 }, {  2, 0x0000 }, {  3, 0x0000 },
 38         {  4, 0x0050 }, {  5, 0x0000 }, {  6, 0x0140 }, {  7, 0x0000 },
 39         {  8, 0x0000 }, {  9, 0x0000 }, { 10, 0x0000 }, { 11, 0x00ff },
 40         { 12, 0x0000 }, { 13, 0x0000 }, { 14, 0x0100 }, { 15, 0x00ff },
 41         { 16, 0x0000 }, { 17, 0x0000 }, { 18, 0x012c }, { 19, 0x002c },
 42         { 20, 0x002c }, { 21, 0x002c }, { 22, 0x002c }, { 23, 0x0000 },
 43         { 24, 0x0032 }, { 25, 0x0000 }, { 26, 0x0000 }, { 27, 0x0000 },
 44         { 28, 0x0000 }, { 29, 0x0000 }, { 30, 0x0000 }, { 31, 0x0000 },
 45         { 32, 0x0038 }, { 33, 0x000b }, { 34, 0x0032 }, { 35, 0x0000 },
 46         { 36, 0x0008 }, { 37, 0x000c }, { 38, 0x0093 }, { 39, 0x00e9 },
 47         { 40, 0x0000 }, { 41, 0x0000 }, { 42, 0x0000 }, { 43, 0x0000 },
 48         { 44, 0x0003 }, { 45, 0x0010 }, { 46, 0x0000 }, { 47, 0x0000 },
 49         { 48, 0x0000 }, { 49, 0x0002 }, { 50, 0x0000 }, { 51, 0x0000 },
 50         { 52, 0x0000 }, { 53, 0x0000 }, { 54, 0x0039 }, { 55, 0x0000 },
 51         { 56, 0x0000 },
 52 };
 53 
 54 #define WM8974_POWER1_BIASEN  0x08
 55 #define WM8974_POWER1_BUFIOEN 0x04
 56 
 57 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 58 
 59 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 60 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 61 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 62 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 63 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 64 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 65 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 66 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 67 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 68 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 69 
 70 static const struct soc_enum wm8974_enum[] = {
 71         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 72         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 73         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 74         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 75 
 76         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 77         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 78         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 79         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 80 
 81         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 82         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 83         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 84         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 85 
 86         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 87         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 88 };
 89 
 90 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
 91 
 92 static SOC_ENUM_SINGLE_DECL(wm8974_auxmode,
 93                             WM8974_INPUT,  3, wm8974_auxmode_text);
 94 
 95 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
 96 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 97 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 98 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 99 
100 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
101 
102 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
103 
104 SOC_ENUM("DAC Companding", wm8974_enum[1]),
105 SOC_ENUM("ADC Companding", wm8974_enum[0]),
106 
107 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
108 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
109 
110 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
111 
112 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
113 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
114 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
115 
116 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
117 
118 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
119 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
120 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
121 
122 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
123 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
124 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
125 
126 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
127 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
128 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
129 
130 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
131 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
132 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
133 
134 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
135 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
136 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
137 
138 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
139 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
140 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
141 
142 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
143 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
144 
145 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
146 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
147 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
148 
149 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
150 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
151 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
152 
153 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
154 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
155 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
156 
157 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
158 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
159 
160 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
161 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
162 
163 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
164 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
165 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
166 
167 SOC_ENUM("Aux Mode", wm8974_auxmode),
168 
169 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
170 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
171 
172 /* DAC / ADC oversampling */
173 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
174 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
175 };
176 
177 /* Speaker Output Mixer */
178 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
179 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
180 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
181 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
182 };
183 
184 /* Mono Output Mixer */
185 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
186 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
187 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
188 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
189 };
190 
191 /* Boost mixer */
192 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
193 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
194 };
195 
196 /* Input PGA */
197 static const struct snd_kcontrol_new wm8974_inpga[] = {
198 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
199 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
200 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
201 };
202 
203 /* AUX Input boost vol */
204 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
205 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
206 
207 /* Mic Input boost vol */
208 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
209 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
210 
211 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
212 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
213         &wm8974_speaker_mixer_controls[0],
214         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
215 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
216         &wm8974_mono_mixer_controls[0],
217         ARRAY_SIZE(wm8974_mono_mixer_controls)),
218 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
219 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
220 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
221 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
222 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
223 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
224 
225 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
226                    ARRAY_SIZE(wm8974_inpga)),
227 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
228                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
229 
230 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
231 
232 SND_SOC_DAPM_INPUT("MICN"),
233 SND_SOC_DAPM_INPUT("MICP"),
234 SND_SOC_DAPM_INPUT("AUX"),
235 SND_SOC_DAPM_OUTPUT("MONOOUT"),
236 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
237 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
238 };
239 
240 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
241         /* Mono output mixer */
242         {"Mono Mixer", "PCM Playback Switch", "DAC"},
243         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
244         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
245 
246         /* Speaker output mixer */
247         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
248         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
249         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
250 
251         /* Outputs */
252         {"Mono Out", NULL, "Mono Mixer"},
253         {"MONOOUT", NULL, "Mono Out"},
254         {"SpkN Out", NULL, "Speaker Mixer"},
255         {"SpkP Out", NULL, "Speaker Mixer"},
256         {"SPKOUTN", NULL, "SpkN Out"},
257         {"SPKOUTP", NULL, "SpkP Out"},
258 
259         /* Boost Mixer */
260         {"ADC", NULL, "Boost Mixer"},
261         {"Boost Mixer", "Aux Switch", "Aux Input"},
262         {"Boost Mixer", NULL, "Input PGA"},
263         {"Boost Mixer", NULL, "MICP"},
264 
265         /* Input PGA */
266         {"Input PGA", "Aux Switch", "Aux Input"},
267         {"Input PGA", "MicN Switch", "MICN"},
268         {"Input PGA", "MicP Switch", "MICP"},
269 
270         /* Inputs */
271         {"Aux Input", NULL, "AUX"},
272 };
273 
274 struct pll_ {
275         unsigned int pre_div:1;
276         unsigned int n:4;
277         unsigned int k;
278 };
279 
280 /* The size in bits of the pll divide multiplied by 10
281  * to allow rounding later */
282 #define FIXED_PLL_SIZE ((1 << 24) * 10)
283 
284 static void pll_factors(struct pll_ *pll_div,
285                         unsigned int target, unsigned int source)
286 {
287         unsigned long long Kpart;
288         unsigned int K, Ndiv, Nmod;
289 
290         /* There is a fixed divide by 4 in the output path */
291         target *= 4;
292 
293         Ndiv = target / source;
294         if (Ndiv < 6) {
295                 source /= 2;
296                 pll_div->pre_div = 1;
297                 Ndiv = target / source;
298         } else
299                 pll_div->pre_div = 0;
300 
301         if ((Ndiv < 6) || (Ndiv > 12))
302                 printk(KERN_WARNING
303                         "WM8974 N value %u outwith recommended range!\n",
304                         Ndiv);
305 
306         pll_div->n = Ndiv;
307         Nmod = target % source;
308         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
309 
310         do_div(Kpart, source);
311 
312         K = Kpart & 0xFFFFFFFF;
313 
314         /* Check if we need to round */
315         if ((K % 10) >= 5)
316                 K += 5;
317 
318         /* Move down to proper range now rounding is done */
319         K /= 10;
320 
321         pll_div->k = K;
322 }
323 
324 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
325                 int source, unsigned int freq_in, unsigned int freq_out)
326 {
327         struct snd_soc_codec *codec = codec_dai->codec;
328         struct pll_ pll_div;
329         u16 reg;
330 
331         if (freq_in == 0 || freq_out == 0) {
332                 /* Clock CODEC directly from MCLK */
333                 reg = snd_soc_read(codec, WM8974_CLOCK);
334                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
335 
336                 /* Turn off PLL */
337                 reg = snd_soc_read(codec, WM8974_POWER1);
338                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
339                 return 0;
340         }
341 
342         pll_factors(&pll_div, freq_out, freq_in);
343 
344         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
345         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
346         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
347         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
348         reg = snd_soc_read(codec, WM8974_POWER1);
349         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
350 
351         /* Run CODEC from PLL instead of MCLK */
352         reg = snd_soc_read(codec, WM8974_CLOCK);
353         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
354 
355         return 0;
356 }
357 
358 /*
359  * Configure WM8974 clock dividers.
360  */
361 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
362                 int div_id, int div)
363 {
364         struct snd_soc_codec *codec = codec_dai->codec;
365         u16 reg;
366 
367         switch (div_id) {
368         case WM8974_OPCLKDIV:
369                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
370                 snd_soc_write(codec, WM8974_GPIO, reg | div);
371                 break;
372         case WM8974_MCLKDIV:
373                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
374                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
375                 break;
376         case WM8974_BCLKDIV:
377                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
378                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
379                 break;
380         default:
381                 return -EINVAL;
382         }
383 
384         return 0;
385 }
386 
387 static unsigned int wm8974_get_mclkdiv(unsigned int f_in, unsigned int f_out,
388                                        int *mclkdiv)
389 {
390         unsigned int ratio = 2 * f_in / f_out;
391 
392         if (ratio <= 2) {
393                 *mclkdiv = WM8974_MCLKDIV_1;
394                 ratio = 2;
395         } else if (ratio == 3) {
396                 *mclkdiv = WM8974_MCLKDIV_1_5;
397         } else if (ratio == 4) {
398                 *mclkdiv = WM8974_MCLKDIV_2;
399         } else if (ratio <= 6) {
400                 *mclkdiv = WM8974_MCLKDIV_3;
401                 ratio = 6;
402         } else if (ratio <= 8) {
403                 *mclkdiv = WM8974_MCLKDIV_4;
404                 ratio = 8;
405         } else if (ratio <= 12) {
406                 *mclkdiv = WM8974_MCLKDIV_6;
407                 ratio = 12;
408         } else if (ratio <= 16) {
409                 *mclkdiv = WM8974_MCLKDIV_8;
410                 ratio = 16;
411         } else {
412                 *mclkdiv = WM8974_MCLKDIV_12;
413                 ratio = 24;
414         }
415 
416         return f_out * ratio / 2;
417 }
418 
419 static int wm8974_update_clocks(struct snd_soc_dai *dai)
420 {
421         struct snd_soc_codec *codec = dai->codec;
422         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
423         unsigned int fs256;
424         unsigned int fpll = 0;
425         unsigned int f;
426         int mclkdiv;
427 
428         if (!priv->mclk || !priv->fs)
429                 return 0;
430 
431         fs256 = 256 * priv->fs;
432 
433         f = wm8974_get_mclkdiv(priv->mclk, fs256, &mclkdiv);
434 
435         if (f != priv->mclk) {
436                 /* The PLL performs best around 90MHz */
437                 fpll = wm8974_get_mclkdiv(22500000, fs256, &mclkdiv);
438         }
439 
440         wm8974_set_dai_pll(dai, 0, 0, priv->mclk, fpll);
441         wm8974_set_dai_clkdiv(dai, WM8974_MCLKDIV, mclkdiv);
442 
443         return 0;
444 }
445 
446 static int wm8974_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
447                                  unsigned int freq, int dir)
448 {
449         struct snd_soc_codec *codec = dai->codec;
450         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
451 
452         if (dir != SND_SOC_CLOCK_IN)
453                 return -EINVAL;
454 
455         priv->mclk = freq;
456 
457         return wm8974_update_clocks(dai);
458 }
459 
460 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
461                 unsigned int fmt)
462 {
463         struct snd_soc_codec *codec = codec_dai->codec;
464         u16 iface = 0;
465         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
466 
467         /* set master/slave audio interface */
468         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
469         case SND_SOC_DAIFMT_CBM_CFM:
470                 clk |= 0x0001;
471                 break;
472         case SND_SOC_DAIFMT_CBS_CFS:
473                 break;
474         default:
475                 return -EINVAL;
476         }
477 
478         /* interface format */
479         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
480         case SND_SOC_DAIFMT_I2S:
481                 iface |= 0x0010;
482                 break;
483         case SND_SOC_DAIFMT_RIGHT_J:
484                 break;
485         case SND_SOC_DAIFMT_LEFT_J:
486                 iface |= 0x0008;
487                 break;
488         case SND_SOC_DAIFMT_DSP_A:
489                 iface |= 0x00018;
490                 break;
491         default:
492                 return -EINVAL;
493         }
494 
495         /* clock inversion */
496         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
497         case SND_SOC_DAIFMT_NB_NF:
498                 break;
499         case SND_SOC_DAIFMT_IB_IF:
500                 iface |= 0x0180;
501                 break;
502         case SND_SOC_DAIFMT_IB_NF:
503                 iface |= 0x0100;
504                 break;
505         case SND_SOC_DAIFMT_NB_IF:
506                 iface |= 0x0080;
507                 break;
508         default:
509                 return -EINVAL;
510         }
511 
512         snd_soc_write(codec, WM8974_IFACE, iface);
513         snd_soc_write(codec, WM8974_CLOCK, clk);
514         return 0;
515 }
516 
517 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
518                                 struct snd_pcm_hw_params *params,
519                                 struct snd_soc_dai *dai)
520 {
521         struct snd_soc_codec *codec = dai->codec;
522         struct wm8974_priv *priv = snd_soc_codec_get_drvdata(codec);
523         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
524         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
525         int err;
526 
527         priv->fs = params_rate(params);
528         err = wm8974_update_clocks(dai);
529         if (err)
530                 return err;
531 
532         /* bit size */
533         switch (params_width(params)) {
534         case 16:
535                 break;
536         case 20:
537                 iface |= 0x0020;
538                 break;
539         case 24:
540                 iface |= 0x0040;
541                 break;
542         case 32:
543                 iface |= 0x0060;
544                 break;
545         }
546 
547         /* filter coefficient */
548         switch (params_rate(params)) {
549         case 8000:
550                 adn |= 0x5 << 1;
551                 break;
552         case 11025:
553                 adn |= 0x4 << 1;
554                 break;
555         case 16000:
556                 adn |= 0x3 << 1;
557                 break;
558         case 22050:
559                 adn |= 0x2 << 1;
560                 break;
561         case 32000:
562                 adn |= 0x1 << 1;
563                 break;
564         case 44100:
565         case 48000:
566                 break;
567         }
568 
569         snd_soc_write(codec, WM8974_IFACE, iface);
570         snd_soc_write(codec, WM8974_ADD, adn);
571         return 0;
572 }
573 
574 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
575 {
576         struct snd_soc_codec *codec = dai->codec;
577         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
578 
579         if (mute)
580                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
581         else
582                 snd_soc_write(codec, WM8974_DAC, mute_reg);
583         return 0;
584 }
585 
586 /* liam need to make this lower power with dapm */
587 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
588         enum snd_soc_bias_level level)
589 {
590         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
591 
592         switch (level) {
593         case SND_SOC_BIAS_ON:
594         case SND_SOC_BIAS_PREPARE:
595                 power1 |= 0x1;  /* VMID 50k */
596                 snd_soc_write(codec, WM8974_POWER1, power1);
597                 break;
598 
599         case SND_SOC_BIAS_STANDBY:
600                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
601 
602                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
603                         regcache_sync(dev_get_regmap(codec->dev, NULL));
604 
605                         /* Initial cap charge at VMID 5k */
606                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
607                         mdelay(100);
608                 }
609 
610                 power1 |= 0x2;  /* VMID 500k */
611                 snd_soc_write(codec, WM8974_POWER1, power1);
612                 break;
613 
614         case SND_SOC_BIAS_OFF:
615                 snd_soc_write(codec, WM8974_POWER1, 0);
616                 snd_soc_write(codec, WM8974_POWER2, 0);
617                 snd_soc_write(codec, WM8974_POWER3, 0);
618                 break;
619         }
620 
621         return 0;
622 }
623 
624 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
625 
626 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
627         SNDRV_PCM_FMTBIT_S24_LE)
628 
629 static const struct snd_soc_dai_ops wm8974_ops = {
630         .hw_params = wm8974_pcm_hw_params,
631         .digital_mute = wm8974_mute,
632         .set_fmt = wm8974_set_dai_fmt,
633         .set_clkdiv = wm8974_set_dai_clkdiv,
634         .set_pll = wm8974_set_dai_pll,
635         .set_sysclk = wm8974_set_dai_sysclk,
636 };
637 
638 static struct snd_soc_dai_driver wm8974_dai = {
639         .name = "wm8974-hifi",
640         .playback = {
641                 .stream_name = "Playback",
642                 .channels_min = 1,
643                 .channels_max = 2,   /* Only 1 channel of data */
644                 .rates = WM8974_RATES,
645                 .formats = WM8974_FORMATS,},
646         .capture = {
647                 .stream_name = "Capture",
648                 .channels_min = 1,
649                 .channels_max = 2,   /* Only 1 channel of data */
650                 .rates = WM8974_RATES,
651                 .formats = WM8974_FORMATS,},
652         .ops = &wm8974_ops,
653         .symmetric_rates = 1,
654 };
655 
656 static const struct regmap_config wm8974_regmap = {
657         .reg_bits = 7,
658         .val_bits = 9,
659 
660         .max_register = WM8974_MONOMIX,
661         .reg_defaults = wm8974_reg_defaults,
662         .num_reg_defaults = ARRAY_SIZE(wm8974_reg_defaults),
663         .cache_type = REGCACHE_FLAT,
664 };
665 
666 static int wm8974_probe(struct snd_soc_codec *codec)
667 {
668         int ret = 0;
669 
670         ret = wm8974_reset(codec);
671         if (ret < 0) {
672                 dev_err(codec->dev, "Failed to issue reset\n");
673                 return ret;
674         }
675 
676         return 0;
677 }
678 
679 static const struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
680         .probe =        wm8974_probe,
681         .set_bias_level = wm8974_set_bias_level,
682         .suspend_bias_off = true,
683 
684         .component_driver = {
685                 .controls               = wm8974_snd_controls,
686                 .num_controls           = ARRAY_SIZE(wm8974_snd_controls),
687                 .dapm_widgets           = wm8974_dapm_widgets,
688                 .num_dapm_widgets       = ARRAY_SIZE(wm8974_dapm_widgets),
689                 .dapm_routes            = wm8974_dapm_routes,
690                 .num_dapm_routes        = ARRAY_SIZE(wm8974_dapm_routes),
691         },
692 };
693 
694 static int wm8974_i2c_probe(struct i2c_client *i2c,
695                             const struct i2c_device_id *id)
696 {
697         struct wm8974_priv *priv;
698         struct regmap *regmap;
699         int ret;
700 
701         priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
702         if (!priv)
703                 return -ENOMEM;
704 
705         i2c_set_clientdata(i2c, priv);
706 
707         regmap = devm_regmap_init_i2c(i2c, &wm8974_regmap);
708         if (IS_ERR(regmap))
709                 return PTR_ERR(regmap);
710 
711         ret = snd_soc_register_codec(&i2c->dev,
712                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
713 
714         return ret;
715 }
716 
717 static int wm8974_i2c_remove(struct i2c_client *client)
718 {
719         snd_soc_unregister_codec(&client->dev);
720 
721         return 0;
722 }
723 
724 static const struct i2c_device_id wm8974_i2c_id[] = {
725         { "wm8974", 0 },
726         { }
727 };
728 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
729 
730 static const struct of_device_id wm8974_of_match[] = {
731        { .compatible = "wlf,wm8974", },
732        { }
733 };
734 MODULE_DEVICE_TABLE(of, wm8974_of_match);
735 
736 static struct i2c_driver wm8974_i2c_driver = {
737         .driver = {
738                 .name = "wm8974",
739                 .of_match_table = wm8974_of_match,
740         },
741         .probe =    wm8974_i2c_probe,
742         .remove =   wm8974_i2c_remove,
743         .id_table = wm8974_i2c_id,
744 };
745 
746 module_i2c_driver(wm8974_i2c_driver);
747 
748 MODULE_DESCRIPTION("ASoC WM8974 driver");
749 MODULE_AUTHOR("Liam Girdwood");
750 MODULE_LICENSE("GPL");
751 

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