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

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Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * wm8974.c  --  WM8974 ALSA Soc Audio driver
  3  *
  4  * Copyright 2006-2009 Wolfson Microelectronics PLC.
  5  *
  6  * Author: Liam Girdwood <linux@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/platform_device.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/soc-dapm.h>
 26 #include <sound/initval.h>
 27 #include <sound/tlv.h>
 28 
 29 #include "wm8974.h"
 30 
 31 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
 32         0x0000, 0x0000, 0x0000, 0x0000,
 33         0x0050, 0x0000, 0x0140, 0x0000,
 34         0x0000, 0x0000, 0x0000, 0x00ff,
 35         0x0000, 0x0000, 0x0100, 0x00ff,
 36         0x0000, 0x0000, 0x012c, 0x002c,
 37         0x002c, 0x002c, 0x002c, 0x0000,
 38         0x0032, 0x0000, 0x0000, 0x0000,
 39         0x0000, 0x0000, 0x0000, 0x0000,
 40         0x0038, 0x000b, 0x0032, 0x0000,
 41         0x0008, 0x000c, 0x0093, 0x00e9,
 42         0x0000, 0x0000, 0x0000, 0x0000,
 43         0x0003, 0x0010, 0x0000, 0x0000,
 44         0x0000, 0x0002, 0x0000, 0x0000,
 45         0x0000, 0x0000, 0x0039, 0x0000,
 46         0x0000,
 47 };
 48 
 49 #define WM8974_POWER1_BIASEN  0x08
 50 #define WM8974_POWER1_BUFIOEN 0x04
 51 
 52 struct wm8974_priv {
 53         struct snd_soc_codec codec;
 54         u16 reg_cache[WM8974_CACHEREGNUM];
 55 };
 56 
 57 static struct snd_soc_codec *wm8974_codec;
 58 
 59 #define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
 60 
 61 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
 62 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
 63 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
 64 static const char *wm8974_bw[] = {"Narrow", "Wide" };
 65 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
 66 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
 67 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
 68 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
 69 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
 70 static const char *wm8974_alc[] = {"ALC", "Limiter" };
 71 
 72 static const struct soc_enum wm8974_enum[] = {
 73         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
 74         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
 75         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
 76         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
 77 
 78         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
 79         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
 80         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
 81         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
 82 
 83         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
 84         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
 85         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
 86         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
 87 
 88         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
 89         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
 90 };
 91 
 92 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
 93 
 94 static const struct soc_enum wm8974_auxmode =
 95         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
 96 
 97 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
 98 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
 99 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
100 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
101 
102 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
103 
104 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
105 
106 SOC_ENUM("DAC Companding", wm8974_enum[1]),
107 SOC_ENUM("ADC Companding", wm8974_enum[0]),
108 
109 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
110 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
111 
112 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
113 
114 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
115 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
116 SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
117 
118 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
119 
120 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
121 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
122 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
123 
124 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
125 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
126 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
127 
128 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
129 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
130 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
131 
132 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
133 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
134 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
135 
136 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
137 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
138 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
139 
140 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
141 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
142 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
143 
144 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
145 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
146 
147 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
148 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
149 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
150 
151 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
152 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
153 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
154 
155 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
156 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
157 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
158 
159 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
160 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
161 
162 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
163 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
164 
165 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
166 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
167 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
168 
169 SOC_ENUM("Aux Mode", wm8974_auxmode),
170 
171 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
172 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
173 };
174 
175 /* Speaker Output Mixer */
176 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
177 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
178 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
179 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
180 };
181 
182 /* Mono Output Mixer */
183 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
184 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
185 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
186 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
187 };
188 
189 /* Boost mixer */
190 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
191 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
192 };
193 
194 /* Input PGA */
195 static const struct snd_kcontrol_new wm8974_inpga[] = {
196 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
197 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
198 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
199 };
200 
201 /* AUX Input boost vol */
202 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
203 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
204 
205 /* Mic Input boost vol */
206 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
207 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
208 
209 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
210 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
211         &wm8974_speaker_mixer_controls[0],
212         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
213 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
214         &wm8974_mono_mixer_controls[0],
215         ARRAY_SIZE(wm8974_mono_mixer_controls)),
216 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
217 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
218 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
219 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
220 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
221 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
222 
223 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
224                    ARRAY_SIZE(wm8974_inpga)),
225 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
226                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
227 
228 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
229 
230 SND_SOC_DAPM_INPUT("MICN"),
231 SND_SOC_DAPM_INPUT("MICP"),
232 SND_SOC_DAPM_INPUT("AUX"),
233 SND_SOC_DAPM_OUTPUT("MONOOUT"),
234 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
235 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
236 };
237 
238 static const struct snd_soc_dapm_route audio_map[] = {
239         /* Mono output mixer */
240         {"Mono Mixer", "PCM Playback Switch", "DAC"},
241         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
242         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
243 
244         /* Speaker output mixer */
245         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
246         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
247         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
248 
249         /* Outputs */
250         {"Mono Out", NULL, "Mono Mixer"},
251         {"MONOOUT", NULL, "Mono Out"},
252         {"SpkN Out", NULL, "Speaker Mixer"},
253         {"SpkP Out", NULL, "Speaker Mixer"},
254         {"SPKOUTN", NULL, "SpkN Out"},
255         {"SPKOUTP", NULL, "SpkP Out"},
256 
257         /* Boost Mixer */
258         {"ADC", NULL, "Boost Mixer"},
259         {"Boost Mixer", "Aux Switch", "Aux Input"},
260         {"Boost Mixer", NULL, "Input PGA"},
261         {"Boost Mixer", NULL, "MICP"},
262 
263         /* Input PGA */
264         {"Input PGA", "Aux Switch", "Aux Input"},
265         {"Input PGA", "MicN Switch", "MICN"},
266         {"Input PGA", "MicP Switch", "MICP"},
267 
268         /* Inputs */
269         {"Aux Input", NULL, "AUX"},
270 };
271 
272 static int wm8974_add_widgets(struct snd_soc_codec *codec)
273 {
274         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
275                                   ARRAY_SIZE(wm8974_dapm_widgets));
276 
277         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
278 
279         snd_soc_dapm_new_widgets(codec);
280         return 0;
281 }
282 
283 struct pll_ {
284         unsigned int pre_div:4; /* prescale - 1 */
285         unsigned int n:4;
286         unsigned int k;
287 };
288 
289 static struct pll_ pll_div;
290 
291 /* The size in bits of the pll divide multiplied by 10
292  * to allow rounding later */
293 #define FIXED_PLL_SIZE ((1 << 24) * 10)
294 
295 static void pll_factors(unsigned int target, unsigned int source)
296 {
297         unsigned long long Kpart;
298         unsigned int K, Ndiv, Nmod;
299 
300         Ndiv = target / source;
301         if (Ndiv < 6) {
302                 source >>= 1;
303                 pll_div.pre_div = 1;
304                 Ndiv = target / source;
305         } else
306                 pll_div.pre_div = 0;
307 
308         if ((Ndiv < 6) || (Ndiv > 12))
309                 printk(KERN_WARNING
310                         "WM8974 N value %u outwith recommended range!\n",
311                         Ndiv);
312 
313         pll_div.n = Ndiv;
314         Nmod = target % source;
315         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
316 
317         do_div(Kpart, source);
318 
319         K = Kpart & 0xFFFFFFFF;
320 
321         /* Check if we need to round */
322         if ((K % 10) >= 5)
323                 K += 5;
324 
325         /* Move down to proper range now rounding is done */
326         K /= 10;
327 
328         pll_div.k = K;
329 }
330 
331 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
332                 int pll_id, unsigned int freq_in, unsigned int freq_out)
333 {
334         struct snd_soc_codec *codec = codec_dai->codec;
335         u16 reg;
336 
337         if (freq_in == 0 || freq_out == 0) {
338                 /* Clock CODEC directly from MCLK */
339                 reg = snd_soc_read(codec, WM8974_CLOCK);
340                 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
341 
342                 /* Turn off PLL */
343                 reg = snd_soc_read(codec, WM8974_POWER1);
344                 snd_soc_write(codec, WM8974_POWER1, reg & 0x1df);
345                 return 0;
346         }
347 
348         pll_factors(freq_out*4, freq_in);
349 
350         snd_soc_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
351         snd_soc_write(codec, WM8974_PLLK1, pll_div.k >> 18);
352         snd_soc_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
353         snd_soc_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
354         reg = snd_soc_read(codec, WM8974_POWER1);
355         snd_soc_write(codec, WM8974_POWER1, reg | 0x020);
356 
357         /* Run CODEC from PLL instead of MCLK */
358         reg = snd_soc_read(codec, WM8974_CLOCK);
359         snd_soc_write(codec, WM8974_CLOCK, reg | 0x100);
360 
361         return 0;
362 }
363 
364 /*
365  * Configure WM8974 clock dividers.
366  */
367 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
368                 int div_id, int div)
369 {
370         struct snd_soc_codec *codec = codec_dai->codec;
371         u16 reg;
372 
373         switch (div_id) {
374         case WM8974_OPCLKDIV:
375                 reg = snd_soc_read(codec, WM8974_GPIO) & 0x1cf;
376                 snd_soc_write(codec, WM8974_GPIO, reg | div);
377                 break;
378         case WM8974_MCLKDIV:
379                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x11f;
380                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
381                 break;
382         case WM8974_ADCCLK:
383                 reg = snd_soc_read(codec, WM8974_ADC) & 0x1f7;
384                 snd_soc_write(codec, WM8974_ADC, reg | div);
385                 break;
386         case WM8974_DACCLK:
387                 reg = snd_soc_read(codec, WM8974_DAC) & 0x1f7;
388                 snd_soc_write(codec, WM8974_DAC, reg | div);
389                 break;
390         case WM8974_BCLKDIV:
391                 reg = snd_soc_read(codec, WM8974_CLOCK) & 0x1e3;
392                 snd_soc_write(codec, WM8974_CLOCK, reg | div);
393                 break;
394         default:
395                 return -EINVAL;
396         }
397 
398         return 0;
399 }
400 
401 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
402                 unsigned int fmt)
403 {
404         struct snd_soc_codec *codec = codec_dai->codec;
405         u16 iface = 0;
406         u16 clk = snd_soc_read(codec, WM8974_CLOCK) & 0x1fe;
407 
408         /* set master/slave audio interface */
409         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
410         case SND_SOC_DAIFMT_CBM_CFM:
411                 clk |= 0x0001;
412                 break;
413         case SND_SOC_DAIFMT_CBS_CFS:
414                 break;
415         default:
416                 return -EINVAL;
417         }
418 
419         /* interface format */
420         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
421         case SND_SOC_DAIFMT_I2S:
422                 iface |= 0x0010;
423                 break;
424         case SND_SOC_DAIFMT_RIGHT_J:
425                 break;
426         case SND_SOC_DAIFMT_LEFT_J:
427                 iface |= 0x0008;
428                 break;
429         case SND_SOC_DAIFMT_DSP_A:
430                 iface |= 0x00018;
431                 break;
432         default:
433                 return -EINVAL;
434         }
435 
436         /* clock inversion */
437         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
438         case SND_SOC_DAIFMT_NB_NF:
439                 break;
440         case SND_SOC_DAIFMT_IB_IF:
441                 iface |= 0x0180;
442                 break;
443         case SND_SOC_DAIFMT_IB_NF:
444                 iface |= 0x0100;
445                 break;
446         case SND_SOC_DAIFMT_NB_IF:
447                 iface |= 0x0080;
448                 break;
449         default:
450                 return -EINVAL;
451         }
452 
453         snd_soc_write(codec, WM8974_IFACE, iface);
454         snd_soc_write(codec, WM8974_CLOCK, clk);
455         return 0;
456 }
457 
458 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
459                                 struct snd_pcm_hw_params *params,
460                                 struct snd_soc_dai *dai)
461 {
462         struct snd_soc_codec *codec = dai->codec;
463         u16 iface = snd_soc_read(codec, WM8974_IFACE) & 0x19f;
464         u16 adn = snd_soc_read(codec, WM8974_ADD) & 0x1f1;
465 
466         /* bit size */
467         switch (params_format(params)) {
468         case SNDRV_PCM_FORMAT_S16_LE:
469                 break;
470         case SNDRV_PCM_FORMAT_S20_3LE:
471                 iface |= 0x0020;
472                 break;
473         case SNDRV_PCM_FORMAT_S24_LE:
474                 iface |= 0x0040;
475                 break;
476         case SNDRV_PCM_FORMAT_S32_LE:
477                 iface |= 0x0060;
478                 break;
479         }
480 
481         /* filter coefficient */
482         switch (params_rate(params)) {
483         case 8000:
484                 adn |= 0x5 << 1;
485                 break;
486         case 11025:
487                 adn |= 0x4 << 1;
488                 break;
489         case 16000:
490                 adn |= 0x3 << 1;
491                 break;
492         case 22050:
493                 adn |= 0x2 << 1;
494                 break;
495         case 32000:
496                 adn |= 0x1 << 1;
497                 break;
498         case 44100:
499         case 48000:
500                 break;
501         }
502 
503         snd_soc_write(codec, WM8974_IFACE, iface);
504         snd_soc_write(codec, WM8974_ADD, adn);
505         return 0;
506 }
507 
508 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
509 {
510         struct snd_soc_codec *codec = dai->codec;
511         u16 mute_reg = snd_soc_read(codec, WM8974_DAC) & 0xffbf;
512 
513         if (mute)
514                 snd_soc_write(codec, WM8974_DAC, mute_reg | 0x40);
515         else
516                 snd_soc_write(codec, WM8974_DAC, mute_reg);
517         return 0;
518 }
519 
520 /* liam need to make this lower power with dapm */
521 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
522         enum snd_soc_bias_level level)
523 {
524         u16 power1 = snd_soc_read(codec, WM8974_POWER1) & ~0x3;
525 
526         switch (level) {
527         case SND_SOC_BIAS_ON:
528         case SND_SOC_BIAS_PREPARE:
529                 power1 |= 0x1;  /* VMID 50k */
530                 snd_soc_write(codec, WM8974_POWER1, power1);
531                 break;
532 
533         case SND_SOC_BIAS_STANDBY:
534                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
535 
536                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
537                         /* Initial cap charge at VMID 5k */
538                         snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
539                         mdelay(100);
540                 }
541 
542                 power1 |= 0x2;  /* VMID 500k */
543                 snd_soc_write(codec, WM8974_POWER1, power1);
544                 break;
545 
546         case SND_SOC_BIAS_OFF:
547                 snd_soc_write(codec, WM8974_POWER1, 0);
548                 snd_soc_write(codec, WM8974_POWER2, 0);
549                 snd_soc_write(codec, WM8974_POWER3, 0);
550                 break;
551         }
552 
553         codec->bias_level = level;
554         return 0;
555 }
556 
557 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
558 
559 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
560         SNDRV_PCM_FMTBIT_S24_LE)
561 
562 static struct snd_soc_dai_ops wm8974_ops = {
563         .hw_params = wm8974_pcm_hw_params,
564         .digital_mute = wm8974_mute,
565         .set_fmt = wm8974_set_dai_fmt,
566         .set_clkdiv = wm8974_set_dai_clkdiv,
567         .set_pll = wm8974_set_dai_pll,
568 };
569 
570 struct snd_soc_dai wm8974_dai = {
571         .name = "WM8974 HiFi",
572         .playback = {
573                 .stream_name = "Playback",
574                 .channels_min = 1,
575                 .channels_max = 2,   /* Only 1 channel of data */
576                 .rates = WM8974_RATES,
577                 .formats = WM8974_FORMATS,},
578         .capture = {
579                 .stream_name = "Capture",
580                 .channels_min = 1,
581                 .channels_max = 2,   /* Only 1 channel of data */
582                 .rates = WM8974_RATES,
583                 .formats = WM8974_FORMATS,},
584         .ops = &wm8974_ops,
585         .symmetric_rates = 1,
586 };
587 EXPORT_SYMBOL_GPL(wm8974_dai);
588 
589 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
590 {
591         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
592         struct snd_soc_codec *codec = socdev->card->codec;
593 
594         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
595         return 0;
596 }
597 
598 static int wm8974_resume(struct platform_device *pdev)
599 {
600         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
601         struct snd_soc_codec *codec = socdev->card->codec;
602         int i;
603         u8 data[2];
604         u16 *cache = codec->reg_cache;
605 
606         /* Sync reg_cache with the hardware */
607         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
608                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
609                 data[1] = cache[i] & 0x00ff;
610                 codec->hw_write(codec->control_data, data, 2);
611         }
612         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
613         wm8974_set_bias_level(codec, codec->suspend_bias_level);
614         return 0;
615 }
616 
617 static int wm8974_probe(struct platform_device *pdev)
618 {
619         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
620         struct snd_soc_codec *codec;
621         int ret = 0;
622 
623         if (wm8974_codec == NULL) {
624                 dev_err(&pdev->dev, "Codec device not registered\n");
625                 return -ENODEV;
626         }
627 
628         socdev->card->codec = wm8974_codec;
629         codec = wm8974_codec;
630 
631         /* register pcms */
632         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
633         if (ret < 0) {
634                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
635                 goto pcm_err;
636         }
637 
638         snd_soc_add_controls(codec, wm8974_snd_controls,
639                              ARRAY_SIZE(wm8974_snd_controls));
640         wm8974_add_widgets(codec);
641         ret = snd_soc_init_card(socdev);
642         if (ret < 0) {
643                 dev_err(codec->dev, "failed to register card: %d\n", ret);
644                 goto card_err;
645         }
646 
647         return ret;
648 
649 card_err:
650         snd_soc_free_pcms(socdev);
651         snd_soc_dapm_free(socdev);
652 pcm_err:
653         return ret;
654 }
655 
656 /* power down chip */
657 static int wm8974_remove(struct platform_device *pdev)
658 {
659         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
660 
661         snd_soc_free_pcms(socdev);
662         snd_soc_dapm_free(socdev);
663 
664         return 0;
665 }
666 
667 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
668         .probe =        wm8974_probe,
669         .remove =       wm8974_remove,
670         .suspend =      wm8974_suspend,
671         .resume =       wm8974_resume,
672 };
673 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
674 
675 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
676 {
677         int ret;
678         struct snd_soc_codec *codec = &wm8974->codec;
679 
680         if (wm8974_codec) {
681                 dev_err(codec->dev, "Another WM8974 is registered\n");
682                 return -EINVAL;
683         }
684 
685         mutex_init(&codec->mutex);
686         INIT_LIST_HEAD(&codec->dapm_widgets);
687         INIT_LIST_HEAD(&codec->dapm_paths);
688 
689         codec->private_data = wm8974;
690         codec->name = "WM8974";
691         codec->owner = THIS_MODULE;
692         codec->bias_level = SND_SOC_BIAS_OFF;
693         codec->set_bias_level = wm8974_set_bias_level;
694         codec->dai = &wm8974_dai;
695         codec->num_dai = 1;
696         codec->reg_cache_size = WM8974_CACHEREGNUM;
697         codec->reg_cache = &wm8974->reg_cache;
698 
699         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_I2C);
700         if (ret < 0) {
701                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
702                 goto err;
703         }
704 
705         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
706 
707         ret = wm8974_reset(codec);
708         if (ret < 0) {
709                 dev_err(codec->dev, "Failed to issue reset\n");
710                 goto err;
711         }
712 
713         wm8974_dai.dev = codec->dev;
714 
715         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
716 
717         wm8974_codec = codec;
718 
719         ret = snd_soc_register_codec(codec);
720         if (ret != 0) {
721                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
722                 goto err;
723         }
724 
725         ret = snd_soc_register_dai(&wm8974_dai);
726         if (ret != 0) {
727                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
728                 goto err_codec;
729         }
730 
731         return 0;
732 
733 err_codec:
734         snd_soc_unregister_codec(codec);
735 err:
736         kfree(wm8974);
737         return ret;
738 }
739 
740 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
741 {
742         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
743         snd_soc_unregister_dai(&wm8974_dai);
744         snd_soc_unregister_codec(&wm8974->codec);
745         kfree(wm8974);
746         wm8974_codec = NULL;
747 }
748 
749 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
750                                       const struct i2c_device_id *id)
751 {
752         struct wm8974_priv *wm8974;
753         struct snd_soc_codec *codec;
754 
755         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
756         if (wm8974 == NULL)
757                 return -ENOMEM;
758 
759         codec = &wm8974->codec;
760         codec->hw_write = (hw_write_t)i2c_master_send;
761 
762         i2c_set_clientdata(i2c, wm8974);
763         codec->control_data = i2c;
764 
765         codec->dev = &i2c->dev;
766 
767         return wm8974_register(wm8974);
768 }
769 
770 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
771 {
772         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
773         wm8974_unregister(wm8974);
774         return 0;
775 }
776 
777 static const struct i2c_device_id wm8974_i2c_id[] = {
778         { "wm8974", 0 },
779         { }
780 };
781 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
782 
783 static struct i2c_driver wm8974_i2c_driver = {
784         .driver = {
785                 .name = "WM8974",
786                 .owner = THIS_MODULE,
787         },
788         .probe =    wm8974_i2c_probe,
789         .remove =   __devexit_p(wm8974_i2c_remove),
790         .id_table = wm8974_i2c_id,
791 };
792 
793 static int __init wm8974_modinit(void)
794 {
795         return i2c_add_driver(&wm8974_i2c_driver);
796 }
797 module_init(wm8974_modinit);
798 
799 static void __exit wm8974_exit(void)
800 {
801         i2c_del_driver(&wm8974_i2c_driver);
802 }
803 module_exit(wm8974_exit);
804 
805 MODULE_DESCRIPTION("ASoC WM8974 driver");
806 MODULE_AUTHOR("Liam Girdwood");
807 MODULE_LICENSE("GPL");
808 

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