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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/slab.h>
 21 #include <sound/core.h>
 22 #include <sound/pcm.h>
 23 #include <sound/pcm_params.h>
 24 #include <sound/soc.h>
 25 #include <sound/initval.h>
 26 #include <sound/tlv.h>
 27 
 28 #include "wm8974.h"
 29 
 30 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
 31         0x0000, 0x0000, 0x0000, 0x0000,
 32         0x0050, 0x0000, 0x0140, 0x0000,
 33         0x0000, 0x0000, 0x0000, 0x00ff,
 34         0x0000, 0x0000, 0x0100, 0x00ff,
 35         0x0000, 0x0000, 0x012c, 0x002c,
 36         0x002c, 0x002c, 0x002c, 0x0000,
 37         0x0032, 0x0000, 0x0000, 0x0000,
 38         0x0000, 0x0000, 0x0000, 0x0000,
 39         0x0038, 0x000b, 0x0032, 0x0000,
 40         0x0008, 0x000c, 0x0093, 0x00e9,
 41         0x0000, 0x0000, 0x0000, 0x0000,
 42         0x0003, 0x0010, 0x0000, 0x0000,
 43         0x0000, 0x0002, 0x0000, 0x0000,
 44         0x0000, 0x0000, 0x0039, 0x0000,
 45         0x0000,
 46 };
 47 
 48 #define WM8974_POWER1_BIASEN  0x08
 49 #define WM8974_POWER1_BUFIOEN 0x04
 50 
 51 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 52 
 53 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 54 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 55 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 56 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 57 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 58 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 59 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 60 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 61 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 62 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 63 
 64 static const struct soc_enum wm8974_enum[] = {
 65         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 66         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 67         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 68         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 69 
 70         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 71         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 72         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 73         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 74 
 75         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 76         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 77         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 78         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 79 
 80         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 81         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 82 };
 83 
 84 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
 85 
 86 static const struct soc_enum wm8974_auxmode =
 87         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
 88 
 89 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
 90 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 91 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
 92 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
 93 
 94 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
 95 
 96 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
 97 
 98 SOC_ENUM("DAC Companding", wm8974_enum[1]),
 99 SOC_ENUM("ADC Companding", wm8974_enum[0]),
100 
101 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
102 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
103 
104 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
105 
106 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
107 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
108 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
109 
110 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
111 
112 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
113 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
114 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
115 
116 SOC_ENUM("Equaliser EQ2 Bandwidth", wm8974_enum[5]),
117 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
118 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
119 
120 SOC_ENUM("Equaliser EQ3 Bandwidth", wm8974_enum[7]),
121 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
122 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
123 
124 SOC_ENUM("Equaliser EQ4 Bandwidth", wm8974_enum[9]),
125 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
126 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
127 
128 SOC_ENUM("Equaliser EQ5 Bandwidth", wm8974_enum[11]),
129 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
130 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
131 
132 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
133 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
134 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
135 
136 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
137 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
138 
139 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
140 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
141 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
142 
143 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
144 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
145 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
146 
147 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
148 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
149 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
150 
151 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
152 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
153 
154 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
155 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
156 
157 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
158 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
159 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
160 
161 SOC_ENUM("Aux Mode", wm8974_auxmode),
162 
163 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
164 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
165 
166 /* DAC / ADC oversampling */
167 SOC_SINGLE("DAC 128x Oversampling Switch", WM8974_DAC, 8, 1, 0),
168 SOC_SINGLE("ADC 128x Oversampling Switch", WM8974_ADC, 8, 1, 0),
169 };
170 
171 /* Speaker Output Mixer */
172 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
173 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
174 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
175 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 0),
176 };
177 
178 /* Mono Output Mixer */
179 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
180 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
181 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
182 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
183 };
184 
185 /* Boost mixer */
186 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
187 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
188 };
189 
190 /* Input PGA */
191 static const struct snd_kcontrol_new wm8974_inpga[] = {
192 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
193 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
194 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
195 };
196 
197 /* AUX Input boost vol */
198 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
199 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
200 
201 /* Mic Input boost vol */
202 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
203 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
204 
205 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
206 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
207         &wm8974_speaker_mixer_controls[0],
208         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
209 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
210         &wm8974_mono_mixer_controls[0],
211         ARRAY_SIZE(wm8974_mono_mixer_controls)),
212 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
213 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
214 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
215 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
216 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
217 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
218 
219 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
220                    ARRAY_SIZE(wm8974_inpga)),
221 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
222                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
223 
224 SND_SOC_DAPM_SUPPLY("Mic Bias", WM8974_POWER1, 4, 0, NULL, 0),
225 
226 SND_SOC_DAPM_INPUT("MICN"),
227 SND_SOC_DAPM_INPUT("MICP"),
228 SND_SOC_DAPM_INPUT("AUX"),
229 SND_SOC_DAPM_OUTPUT("MONOOUT"),
230 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
231 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
232 };
233 
234 static const struct snd_soc_dapm_route wm8974_dapm_routes[] = {
235         /* Mono output mixer */
236         {"Mono Mixer", "PCM Playback Switch", "DAC"},
237         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
238         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
239 
240         /* Speaker output mixer */
241         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
242         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
243         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
244 
245         /* Outputs */
246         {"Mono Out", NULL, "Mono Mixer"},
247         {"MONOOUT", NULL, "Mono Out"},
248         {"SpkN Out", NULL, "Speaker Mixer"},
249         {"SpkP Out", NULL, "Speaker Mixer"},
250         {"SPKOUTN", NULL, "SpkN Out"},
251         {"SPKOUTP", NULL, "SpkP Out"},
252 
253         /* Boost Mixer */
254         {"ADC", NULL, "Boost Mixer"},
255         {"Boost Mixer", "Aux Switch", "Aux Input"},
256         {"Boost Mixer", NULL, "Input PGA"},
257         {"Boost Mixer", NULL, "MICP"},
258 
259         /* Input PGA */
260         {"Input PGA", "Aux Switch", "Aux Input"},
261         {"Input PGA", "MicN Switch", "MICN"},
262         {"Input PGA", "MicP Switch", "MICP"},
263 
264         /* Inputs */
265         {"Aux Input", NULL, "AUX"},
266 };
267 
268 struct pll_ {
269         unsigned int pre_div:1;
270         unsigned int n:4;
271         unsigned int k;
272 };
273 
274 /* The size in bits of the pll divide multiplied by 10
275  * to allow rounding later */
276 #define FIXED_PLL_SIZE ((1 << 24) * 10)
277 
278 static void pll_factors(struct pll_ *pll_div,
279                         unsigned int target, unsigned int source)
280 {
281         unsigned long long Kpart;
282         unsigned int K, Ndiv, Nmod;
283 
284         /* There is a fixed divide by 4 in the output path */
285         target *= 4;
286 
287         Ndiv = target / source;
288         if (Ndiv < 6) {
289                 source /= 2;
290                 pll_div->pre_div = 1;
291                 Ndiv = target / source;
292         } else
293                 pll_div->pre_div = 0;
294 
295         if ((Ndiv < 6) || (Ndiv > 12))
296                 printk(KERN_WARNING
297                         "WM8974 N value %u outwith recommended range!\n",
298                         Ndiv);
299 
300         pll_div->n = Ndiv;
301         Nmod = target % source;
302         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
303 
304         do_div(Kpart, source);
305 
306         K = Kpart & 0xFFFFFFFF;
307 
308         /* Check if we need to round */
309         if ((K % 10) >= 5)
310                 K += 5;
311 
312         /* Move down to proper range now rounding is done */
313         K /= 10;
314 
315         pll_div->k = K;
316 }
317 
318 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
319                 int source, unsigned int freq_in, unsigned int freq_out)
320 {
321         struct snd_soc_codec *codec = codec_dai->codec;
322         struct pll_ pll_div;
323         u16 reg;
324 
325         if (freq_in == 0 || freq_out == 0) {
326                 /* Clock CODEC directly from MCLK */
327                 reg = snd_soc_read(codec, WM8974_CLOCK);
328                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
329 
330                 /* Turn off PLL */
331                 reg = snd_soc_read(codec, WM8974_POWER1);
332                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
333                 return 0;
334         }
335 
336         pll_factors(&pll_div, freq_out, freq_in);
337 
338         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
339         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
340         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
341         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
342         reg = snd_soc_read(codec, WM8974_POWER1);
343         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
344 
345         /* Run CODEC from PLL instead of MCLK */
346         reg = snd_soc_read(codec, WM8974_CLOCK);
347         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
348 
349         return 0;
350 }
351 
352 /*
353  * Configure WM8974 clock dividers.
354  */
355 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
356                 int div_id, int div)
357 {
358         struct snd_soc_codec *codec = codec_dai->codec;
359         u16 reg;
360 
361         switch (div_id) {
362         case WM8974_OPCLKDIV:
363                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
364                 snd_soc_write(codec, WM8974_GPIO, reg | div);
365                 break;
366         case WM8974_MCLKDIV:
367                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
368                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
369                 break;
370         case WM8974_BCLKDIV:
371                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
372                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
373                 break;
374         default:
375                 return -EINVAL;
376         }
377 
378         return 0;
379 }
380 
381 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
382                 unsigned int fmt)
383 {
384         struct snd_soc_codec *codec = codec_dai->codec;
385         u16 iface = 0;
386         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
387 
388         /* set master/slave audio interface */
389         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
390         case SND_SOC_DAIFMT_CBM_CFM:
391                 clk |= 0x0001;
392                 break;
393         case SND_SOC_DAIFMT_CBS_CFS:
394                 break;
395         default:
396                 return -EINVAL;
397         }
398 
399         /* interface format */
400         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
401         case SND_SOC_DAIFMT_I2S:
402                 iface |= 0x0010;
403                 break;
404         case SND_SOC_DAIFMT_RIGHT_J:
405                 break;
406         case SND_SOC_DAIFMT_LEFT_J:
407                 iface |= 0x0008;
408                 break;
409         case SND_SOC_DAIFMT_DSP_A:
410                 iface |= 0x00018;
411                 break;
412         default:
413                 return -EINVAL;
414         }
415 
416         /* clock inversion */
417         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
418         case SND_SOC_DAIFMT_NB_NF:
419                 break;
420         case SND_SOC_DAIFMT_IB_IF:
421                 iface |= 0x0180;
422                 break;
423         case SND_SOC_DAIFMT_IB_NF:
424                 iface |= 0x0100;
425                 break;
426         case SND_SOC_DAIFMT_NB_IF:
427                 iface |= 0x0080;
428                 break;
429         default:
430                 return -EINVAL;
431         }
432 
433         snd_soc_write(codec, WM8974_IFACE, iface);
434         snd_soc_write(codec, WM8974_CLOCK, clk);
435         return 0;
436 }
437 
438 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
439                                 struct snd_pcm_hw_params *params,
440                                 struct snd_soc_dai *dai)
441 {
442         struct snd_soc_codec *codec = dai->codec;
443         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
444         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
445 
446         /* bit size */
447         switch (params_format(params)) {
448         case SNDRV_PCM_FORMAT_S16_LE:
449                 break;
450         case SNDRV_PCM_FORMAT_S20_3LE:
451                 iface |= 0x0020;
452                 break;
453         case SNDRV_PCM_FORMAT_S24_LE:
454                 iface |= 0x0040;
455                 break;
456         case SNDRV_PCM_FORMAT_S32_LE:
457                 iface |= 0x0060;
458                 break;
459         }
460 
461         /* filter coefficient */
462         switch (params_rate(params)) {
463         case 8000:
464                 adn |= 0x5 << 1;
465                 break;
466         case 11025:
467                 adn |= 0x4 << 1;
468                 break;
469         case 16000:
470                 adn |= 0x3 << 1;
471                 break;
472         case 22050:
473                 adn |= 0x2 << 1;
474                 break;
475         case 32000:
476                 adn |= 0x1 << 1;
477                 break;
478         case 44100:
479         case 48000:
480                 break;
481         }
482 
483         snd_soc_write(codec, WM8974_IFACE, iface);
484         snd_soc_write(codec, WM8974_ADD, adn);
485         return 0;
486 }
487 
488 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
489 {
490         struct snd_soc_codec *codec = dai->codec;
491         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
492 
493         if (mute)
494                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
495         else
496                 snd_soc_write(codec, WM8974_DAC, mute_reg);
497         return 0;
498 }
499 
500 /* liam need to make this lower power with dapm */
501 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
502         enum snd_soc_bias_level level)
503 {
504         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
505 
506         switch (level) {
507         case SND_SOC_BIAS_ON:
508         case SND_SOC_BIAS_PREPARE:
509                 power1 |= 0x1;  /* VMID 50k */
510                 snd_soc_write(codec, WM8974_POWER1, power1);
511                 break;
512 
513         case SND_SOC_BIAS_STANDBY:
514                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
515 
516                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
517                         snd_soc_cache_sync(codec);
518 
519                         /* Initial cap charge at VMID 5k */
520                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
521                         mdelay(100);
522                 }
523 
524                 power1 |= 0x2;  /* VMID 500k */
525                 snd_soc_write(codec, WM8974_POWER1, power1);
526                 break;
527 
528         case SND_SOC_BIAS_OFF:
529                 snd_soc_write(codec, WM8974_POWER1, 0);
530                 snd_soc_write(codec, WM8974_POWER2, 0);
531                 snd_soc_write(codec, WM8974_POWER3, 0);
532                 break;
533         }
534 
535         codec->dapm.bias_level = level;
536         return 0;
537 }
538 
539 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
540 
541 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
542         SNDRV_PCM_FMTBIT_S24_LE)
543 
544 static const struct snd_soc_dai_ops wm8974_ops = {
545         .hw_params = wm8974_pcm_hw_params,
546         .digital_mute = wm8974_mute,
547         .set_fmt = wm8974_set_dai_fmt,
548         .set_clkdiv = wm8974_set_dai_clkdiv,
549         .set_pll = wm8974_set_dai_pll,
550 };
551 
552 static struct snd_soc_dai_driver wm8974_dai = {
553         .name = "wm8974-hifi",
554         .playback = {
555                 .stream_name = "Playback",
556                 .channels_min = 1,
557                 .channels_max = 2,   /* Only 1 channel of data */
558                 .rates = WM8974_RATES,
559                 .formats = WM8974_FORMATS,},
560         .capture = {
561                 .stream_name = "Capture",
562                 .channels_min = 1,
563                 .channels_max = 2,   /* Only 1 channel of data */
564                 .rates = WM8974_RATES,
565                 .formats = WM8974_FORMATS,},
566         .ops = &wm8974_ops,
567         .symmetric_rates = 1,
568 };
569 
570 static int wm8974_suspend(struct snd_soc_codec *codec)
571 {
572         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
573         return 0;
574 }
575 
576 static int wm8974_resume(struct snd_soc_codec *codec)
577 {
578         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
579         return 0;
580 }
581 
582 static int wm8974_probe(struct snd_soc_codec *codec)
583 {
584         int ret = 0;
585 
586         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
587         if (ret < 0) {
588                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
589                 return ret;
590         }
591 
592         ret = wm8974_reset(codec);
593         if (ret < 0) {
594                 dev_err(codec->dev, "Failed to issue reset\n");
595                 return ret;
596         }
597 
598         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
599 
600         return ret;
601 }
602 
603 /* power down chip */
604 static int wm8974_remove(struct snd_soc_codec *codec)
605 {
606         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
607         return 0;
608 }
609 
610 static struct snd_soc_codec_driver soc_codec_dev_wm8974 = {
611         .probe =        wm8974_probe,
612         .remove =       wm8974_remove,
613         .suspend =      wm8974_suspend,
614         .resume =       wm8974_resume,
615         .set_bias_level = wm8974_set_bias_level,
616         .reg_cache_size = ARRAY_SIZE(wm8974_reg),
617         .reg_word_size = sizeof(u16),
618         .reg_cache_default = wm8974_reg,
619 
620         .controls = wm8974_snd_controls,
621         .num_controls = ARRAY_SIZE(wm8974_snd_controls),
622         .dapm_widgets = wm8974_dapm_widgets,
623         .num_dapm_widgets = ARRAY_SIZE(wm8974_dapm_widgets),
624         .dapm_routes = wm8974_dapm_routes,
625         .num_dapm_routes = ARRAY_SIZE(wm8974_dapm_routes),
626 };
627 
628 static int wm8974_i2c_probe(struct i2c_client *i2c,
629                             const struct i2c_device_id *id)
630 {
631         int ret;
632 
633         ret = snd_soc_register_codec(&i2c->dev,
634                         &soc_codec_dev_wm8974, &wm8974_dai, 1);
635 
636         return ret;
637 }
638 
639 static int wm8974_i2c_remove(struct i2c_client *client)
640 {
641         snd_soc_unregister_codec(&client->dev);
642 
643         return 0;
644 }
645 
646 static const struct i2c_device_id wm8974_i2c_id[] = {
647         { "wm8974", 0 },
648         { }
649 };
650 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
651 
652 static struct i2c_driver wm8974_i2c_driver = {
653         .driver = {
654                 .name = "wm8974",
655                 .owner = THIS_MODULE,
656         },
657         .probe =    wm8974_i2c_probe,
658         .remove =   wm8974_i2c_remove,
659         .id_table = wm8974_i2c_id,
660 };
661 
662 module_i2c_driver(wm8974_i2c_driver);
663 
664 MODULE_DESCRIPTION("ASoC WM8974 driver");
665 MODULE_AUTHOR("Liam Girdwood");
666 MODULE_LICENSE("GPL");
667 

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