ASoC: WM8974 DAPM cleanups
[pandora-kernel.git] / sound / soc / codecs / wm8974.c
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/version.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/pm.h>
20 #include <linux/i2c.h>
21 #include <linux/platform_device.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/soc-dapm.h>
27 #include <sound/initval.h>
28 #include <sound/tlv.h>
29
30 #include "wm8974.h"
31
32 static const u16 wm8974_reg[WM8974_CACHEREGNUM] = {
33         0x0000, 0x0000, 0x0000, 0x0000,
34         0x0050, 0x0000, 0x0140, 0x0000,
35         0x0000, 0x0000, 0x0000, 0x00ff,
36         0x0000, 0x0000, 0x0100, 0x00ff,
37         0x0000, 0x0000, 0x012c, 0x002c,
38         0x002c, 0x002c, 0x002c, 0x0000,
39         0x0032, 0x0000, 0x0000, 0x0000,
40         0x0000, 0x0000, 0x0000, 0x0000,
41         0x0038, 0x000b, 0x0032, 0x0000,
42         0x0008, 0x000c, 0x0093, 0x00e9,
43         0x0000, 0x0000, 0x0000, 0x0000,
44         0x0003, 0x0010, 0x0000, 0x0000,
45         0x0000, 0x0002, 0x0000, 0x0000,
46         0x0000, 0x0000, 0x0039, 0x0000,
47         0x0000,
48 };
49
50 #define WM8974_POWER1_BIASEN  0x08
51 #define WM8974_POWER1_BUFIOEN 0x10
52
53 struct wm8974_priv {
54         struct snd_soc_codec codec;
55         u16 reg_cache[WM8974_CACHEREGNUM];
56 };
57
58 static struct snd_soc_codec *wm8974_codec;
59
60 /*
61  * read wm8974 register cache
62  */
63 static inline unsigned int wm8974_read_reg_cache(struct snd_soc_codec *codec,
64         unsigned int reg)
65 {
66         u16 *cache = codec->reg_cache;
67         if (reg == WM8974_RESET)
68                 return 0;
69         if (reg >= WM8974_CACHEREGNUM)
70                 return -1;
71         return cache[reg];
72 }
73
74 /*
75  * write wm8974 register cache
76  */
77 static inline void wm8974_write_reg_cache(struct snd_soc_codec *codec,
78         u16 reg, unsigned int value)
79 {
80         u16 *cache = codec->reg_cache;
81         if (reg >= WM8974_CACHEREGNUM)
82                 return;
83         cache[reg] = value;
84 }
85
86 /*
87  * write to the WM8974 register space
88  */
89 static int wm8974_write(struct snd_soc_codec *codec, unsigned int reg,
90         unsigned int value)
91 {
92         u8 data[2];
93
94         /* data is
95          *   D15..D9 WM8974 register offset
96          *   D8...D0 register data
97          */
98         data[0] = (reg << 1) | ((value >> 8) & 0x0001);
99         data[1] = value & 0x00ff;
100
101         wm8974_write_reg_cache(codec, reg, value);
102         if (codec->hw_write(codec->control_data, data, 2) == 2)
103                 return 0;
104         else
105                 return -EIO;
106 }
107
108 #define wm8974_reset(c) wm8974_write(c, WM8974_RESET, 0)
109
110 static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
111 static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
112 static const char *wm8974_eqmode[] = {"Capture", "Playback" };
113 static const char *wm8974_bw[] = {"Narrow", "Wide" };
114 static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
115 static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
116 static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
117 static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
118 static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
119 static const char *wm8974_alc[] = {"ALC", "Limiter" };
120
121 static const struct soc_enum wm8974_enum[] = {
122         SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding), /* adc */
123         SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding), /* dac */
124         SOC_ENUM_SINGLE(WM8974_DAC,  4, 4, wm8974_deemp),
125         SOC_ENUM_SINGLE(WM8974_EQ1,  8, 2, wm8974_eqmode),
126
127         SOC_ENUM_SINGLE(WM8974_EQ1,  5, 4, wm8974_eq1),
128         SOC_ENUM_SINGLE(WM8974_EQ2,  8, 2, wm8974_bw),
129         SOC_ENUM_SINGLE(WM8974_EQ2,  5, 4, wm8974_eq2),
130         SOC_ENUM_SINGLE(WM8974_EQ3,  8, 2, wm8974_bw),
131
132         SOC_ENUM_SINGLE(WM8974_EQ3,  5, 4, wm8974_eq3),
133         SOC_ENUM_SINGLE(WM8974_EQ4,  8, 2, wm8974_bw),
134         SOC_ENUM_SINGLE(WM8974_EQ4,  5, 4, wm8974_eq4),
135         SOC_ENUM_SINGLE(WM8974_EQ5,  8, 2, wm8974_bw),
136
137         SOC_ENUM_SINGLE(WM8974_EQ5,  5, 4, wm8974_eq5),
138         SOC_ENUM_SINGLE(WM8974_ALC3,  8, 2, wm8974_alc),
139 };
140
141 static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
142
143 static const struct soc_enum wm8974_auxmode =
144         SOC_ENUM_SINGLE(WM8974_INPUT,  3, 2, wm8974_auxmode_text);
145
146 static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
147 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
148 static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
149 static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
150
151 static const struct snd_kcontrol_new wm8974_snd_controls[] = {
152
153 SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
154
155 SOC_ENUM("DAC Companding", wm8974_enum[1]),
156 SOC_ENUM("ADC Companding", wm8974_enum[0]),
157
158 SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
159 SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
160
161 SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
162
163 SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
164 SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
165 SOC_SINGLE("ADC Inversion Switch", WM8974_COMP, 0, 1, 0),
166
167 SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL,  0, 255, 0, digital_tlv),
168
169 SOC_ENUM("Equaliser Function", wm8974_enum[3]),
170 SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
171 SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1,  0, 24, 1, eq_tlv),
172
173 SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
174 SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
175 SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2,  0, 24, 1, eq_tlv),
176
177 SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
178 SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
179 SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3,  0, 24, 1, eq_tlv),
180
181 SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
182 SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
183 SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4,  0, 24, 1, eq_tlv),
184
185 SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
186 SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
187 SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5,  0, 24, 1, eq_tlv),
188
189 SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1,  8, 1, 0),
190 SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1,  4, 15, 0),
191 SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1,  0, 15, 0),
192
193 SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2,  4, 7, 0),
194 SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2,  0, 15, 0),
195
196 SOC_SINGLE("ALC Enable Switch", WM8974_ALC1,  8, 1, 0),
197 SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1,  3, 7, 0),
198 SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1,  0, 7, 0),
199
200 SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2,  8, 1, 0),
201 SOC_SINGLE("ALC Capture Hold", WM8974_ALC2,  4, 7, 0),
202 SOC_SINGLE("ALC Capture Target", WM8974_ALC2,  0, 15, 0),
203
204 SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
205 SOC_SINGLE("ALC Capture Decay", WM8974_ALC3,  4, 15, 0),
206 SOC_SINGLE("ALC Capture Attack", WM8974_ALC3,  0, 15, 0),
207
208 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE,  3, 1, 0),
209 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE,  0, 7, 0),
210
211 SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA,  7, 1, 0),
212 SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA,  0, 63, 0, inpga_tlv),
213
214 SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL,  7, 1, 0),
215 SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL,  6, 1, 1),
216 SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL,  0, 63, 0, spk_tlv),
217
218 SOC_ENUM("Aux Mode", wm8974_auxmode),
219
220 SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST,  8, 1, 0),
221 SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
222 };
223
224 /* Speaker Output Mixer */
225 static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
226 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
227 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
228 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
229 };
230
231 /* Mono Output Mixer */
232 static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
233 SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
234 SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
235 SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
236 };
237
238 /* Boost mixer */
239 static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
240 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
241 };
242
243 /* Input PGA */
244 static const struct snd_kcontrol_new wm8974_inpga[] = {
245 SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
246 SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
247 SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
248 };
249
250 /* AUX Input boost vol */
251 static const struct snd_kcontrol_new wm8974_aux_boost_controls =
252 SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
253
254 /* Mic Input boost vol */
255 static const struct snd_kcontrol_new wm8974_mic_boost_controls =
256 SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
257
258 static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
259 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
260         &wm8974_speaker_mixer_controls[0],
261         ARRAY_SIZE(wm8974_speaker_mixer_controls)),
262 SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
263         &wm8974_mono_mixer_controls[0],
264         ARRAY_SIZE(wm8974_mono_mixer_controls)),
265 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
266 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
267 SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
268 SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
269 SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
270 SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
271
272 SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
273                    ARRAY_SIZE(wm8974_inpga)),
274 SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
275                    wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
276
277 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
278
279 SND_SOC_DAPM_INPUT("MICN"),
280 SND_SOC_DAPM_INPUT("MICP"),
281 SND_SOC_DAPM_INPUT("AUX"),
282 SND_SOC_DAPM_OUTPUT("MONOOUT"),
283 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
284 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
285 };
286
287 static const struct snd_soc_dapm_route audio_map[] = {
288         /* Mono output mixer */
289         {"Mono Mixer", "PCM Playback Switch", "DAC"},
290         {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
291         {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
292
293         /* Speaker output mixer */
294         {"Speaker Mixer", "PCM Playback Switch", "DAC"},
295         {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
296         {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
297
298         /* Outputs */
299         {"Mono Out", NULL, "Mono Mixer"},
300         {"MONOOUT", NULL, "Mono Out"},
301         {"SpkN Out", NULL, "Speaker Mixer"},
302         {"SpkP Out", NULL, "Speaker Mixer"},
303         {"SPKOUTN", NULL, "SpkN Out"},
304         {"SPKOUTP", NULL, "SpkP Out"},
305
306         /* Boost Mixer */
307         {"ADC", NULL, "Boost Mixer"},
308         {"Boost Mixer", "Aux Switch", "Aux Input"},
309         {"Boost Mixer", NULL, "Input PGA"},
310         {"Boost Mixer", NULL, "MICP"},
311
312         /* Input PGA */
313         {"Input PGA", "Aux Switch", "Aux Input"},
314         {"Input PGA", "MicN Switch", "MICN"},
315         {"Input PGA", "MicP Switch", "MICP"},
316
317         /* Inputs */
318         {"Aux Input", NULL, "AUX"},
319 };
320
321 static int wm8974_add_widgets(struct snd_soc_codec *codec)
322 {
323         snd_soc_dapm_new_controls(codec, wm8974_dapm_widgets,
324                                   ARRAY_SIZE(wm8974_dapm_widgets));
325
326         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
327
328         snd_soc_dapm_new_widgets(codec);
329         return 0;
330 }
331
332 struct pll_ {
333         unsigned int pre_div:4; /* prescale - 1 */
334         unsigned int n:4;
335         unsigned int k;
336 };
337
338 static struct pll_ pll_div;
339
340 /* The size in bits of the pll divide multiplied by 10
341  * to allow rounding later */
342 #define FIXED_PLL_SIZE ((1 << 24) * 10)
343
344 static void pll_factors(unsigned int target, unsigned int source)
345 {
346         unsigned long long Kpart;
347         unsigned int K, Ndiv, Nmod;
348
349         Ndiv = target / source;
350         if (Ndiv < 6) {
351                 source >>= 1;
352                 pll_div.pre_div = 1;
353                 Ndiv = target / source;
354         } else
355                 pll_div.pre_div = 0;
356
357         if ((Ndiv < 6) || (Ndiv > 12))
358                 printk(KERN_WARNING
359                         "WM8974 N value %u outwith recommended range!\n",
360                         Ndiv);
361
362         pll_div.n = Ndiv;
363         Nmod = target % source;
364         Kpart = FIXED_PLL_SIZE * (long long)Nmod;
365
366         do_div(Kpart, source);
367
368         K = Kpart & 0xFFFFFFFF;
369
370         /* Check if we need to round */
371         if ((K % 10) >= 5)
372                 K += 5;
373
374         /* Move down to proper range now rounding is done */
375         K /= 10;
376
377         pll_div.k = K;
378 }
379
380 static int wm8974_set_dai_pll(struct snd_soc_dai *codec_dai,
381                 int pll_id, unsigned int freq_in, unsigned int freq_out)
382 {
383         struct snd_soc_codec *codec = codec_dai->codec;
384         u16 reg;
385
386         if (freq_in == 0 || freq_out == 0) {
387                 /* Clock CODEC directly from MCLK */
388                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
389                 wm8974_write(codec, WM8974_CLOCK, reg & 0x0ff);
390
391                 /* Turn off PLL */
392                 reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
393                 wm8974_write(codec, WM8974_POWER1, reg & 0x1df);
394                 return 0;
395         }
396
397         pll_factors(freq_out*4, freq_in);
398
399         wm8974_write(codec, WM8974_PLLN, (pll_div.pre_div << 4) | pll_div.n);
400         wm8974_write(codec, WM8974_PLLK1, pll_div.k >> 18);
401         wm8974_write(codec, WM8974_PLLK2, (pll_div.k >> 9) & 0x1ff);
402         wm8974_write(codec, WM8974_PLLK3, pll_div.k & 0x1ff);
403         reg = wm8974_read_reg_cache(codec, WM8974_POWER1);
404         wm8974_write(codec, WM8974_POWER1, reg | 0x020);
405
406         /* Run CODEC from PLL instead of MCLK */
407         reg = wm8974_read_reg_cache(codec, WM8974_CLOCK);
408         wm8974_write(codec, WM8974_CLOCK, reg | 0x100);
409
410         return 0;
411 }
412
413 /*
414  * Configure WM8974 clock dividers.
415  */
416 static int wm8974_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
417                 int div_id, int div)
418 {
419         struct snd_soc_codec *codec = codec_dai->codec;
420         u16 reg;
421
422         switch (div_id) {
423         case WM8974_OPCLKDIV:
424                 reg = wm8974_read_reg_cache(codec, WM8974_GPIO) & 0x1cf;
425                 wm8974_write(codec, WM8974_GPIO, reg | div);
426                 break;
427         case WM8974_MCLKDIV:
428                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x11f;
429                 wm8974_write(codec, WM8974_CLOCK, reg | div);
430                 break;
431         case WM8974_ADCCLK:
432                 reg = wm8974_read_reg_cache(codec, WM8974_ADC) & 0x1f7;
433                 wm8974_write(codec, WM8974_ADC, reg | div);
434                 break;
435         case WM8974_DACCLK:
436                 reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0x1f7;
437                 wm8974_write(codec, WM8974_DAC, reg | div);
438                 break;
439         case WM8974_BCLKDIV:
440                 reg = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1e3;
441                 wm8974_write(codec, WM8974_CLOCK, reg | div);
442                 break;
443         default:
444                 return -EINVAL;
445         }
446
447         return 0;
448 }
449
450 static int wm8974_set_dai_fmt(struct snd_soc_dai *codec_dai,
451                 unsigned int fmt)
452 {
453         struct snd_soc_codec *codec = codec_dai->codec;
454         u16 iface = 0;
455         u16 clk = wm8974_read_reg_cache(codec, WM8974_CLOCK) & 0x1fe;
456
457         /* set master/slave audio interface */
458         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
459         case SND_SOC_DAIFMT_CBM_CFM:
460                 clk |= 0x0001;
461                 break;
462         case SND_SOC_DAIFMT_CBS_CFS:
463                 break;
464         default:
465                 return -EINVAL;
466         }
467
468         /* interface format */
469         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
470         case SND_SOC_DAIFMT_I2S:
471                 iface |= 0x0010;
472                 break;
473         case SND_SOC_DAIFMT_RIGHT_J:
474                 break;
475         case SND_SOC_DAIFMT_LEFT_J:
476                 iface |= 0x0008;
477                 break;
478         case SND_SOC_DAIFMT_DSP_A:
479                 iface |= 0x00018;
480                 break;
481         default:
482                 return -EINVAL;
483         }
484
485         /* clock inversion */
486         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
487         case SND_SOC_DAIFMT_NB_NF:
488                 break;
489         case SND_SOC_DAIFMT_IB_IF:
490                 iface |= 0x0180;
491                 break;
492         case SND_SOC_DAIFMT_IB_NF:
493                 iface |= 0x0100;
494                 break;
495         case SND_SOC_DAIFMT_NB_IF:
496                 iface |= 0x0080;
497                 break;
498         default:
499                 return -EINVAL;
500         }
501
502         wm8974_write(codec, WM8974_IFACE, iface);
503         wm8974_write(codec, WM8974_CLOCK, clk);
504         return 0;
505 }
506
507 static int wm8974_pcm_hw_params(struct snd_pcm_substream *substream,
508                                 struct snd_pcm_hw_params *params,
509                                 struct snd_soc_dai *dai)
510 {
511         struct snd_soc_codec *codec = dai->codec;
512         u16 iface = wm8974_read_reg_cache(codec, WM8974_IFACE) & 0x19f;
513         u16 adn = wm8974_read_reg_cache(codec, WM8974_ADD) & 0x1f1;
514
515         /* bit size */
516         switch (params_format(params)) {
517         case SNDRV_PCM_FORMAT_S16_LE:
518                 break;
519         case SNDRV_PCM_FORMAT_S20_3LE:
520                 iface |= 0x0020;
521                 break;
522         case SNDRV_PCM_FORMAT_S24_LE:
523                 iface |= 0x0040;
524                 break;
525         case SNDRV_PCM_FORMAT_S32_LE:
526                 iface |= 0x0060;
527                 break;
528         }
529
530         /* filter coefficient */
531         switch (params_rate(params)) {
532         case SNDRV_PCM_RATE_8000:
533                 adn |= 0x5 << 1;
534                 break;
535         case SNDRV_PCM_RATE_11025:
536                 adn |= 0x4 << 1;
537                 break;
538         case SNDRV_PCM_RATE_16000:
539                 adn |= 0x3 << 1;
540                 break;
541         case SNDRV_PCM_RATE_22050:
542                 adn |= 0x2 << 1;
543                 break;
544         case SNDRV_PCM_RATE_32000:
545                 adn |= 0x1 << 1;
546                 break;
547         case SNDRV_PCM_RATE_44100:
548         case SNDRV_PCM_RATE_48000:
549                 break;
550         }
551
552         wm8974_write(codec, WM8974_IFACE, iface);
553         wm8974_write(codec, WM8974_ADD, adn);
554         return 0;
555 }
556
557 static int wm8974_mute(struct snd_soc_dai *dai, int mute)
558 {
559         struct snd_soc_codec *codec = dai->codec;
560         u16 mute_reg = wm8974_read_reg_cache(codec, WM8974_DAC) & 0xffbf;
561
562         if (mute)
563                 wm8974_write(codec, WM8974_DAC, mute_reg | 0x40);
564         else
565                 wm8974_write(codec, WM8974_DAC, mute_reg);
566         return 0;
567 }
568
569 /* liam need to make this lower power with dapm */
570 static int wm8974_set_bias_level(struct snd_soc_codec *codec,
571         enum snd_soc_bias_level level)
572 {
573         u16 power1 = wm8974_read_reg_cache(codec, WM8974_POWER1) & ~0x3;
574
575         switch (level) {
576         case SND_SOC_BIAS_ON:
577         case SND_SOC_BIAS_PREPARE:
578                 power1 |= 0x1;  /* VMID 50k */
579                 wm8974_write(codec, WM8974_POWER1, power1);
580                 break;
581
582         case SND_SOC_BIAS_STANDBY:
583                 power1 |= WM8974_POWER1_BIASEN | WM8974_POWER1_BUFIOEN;
584
585                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
586                         /* Initial cap charge at VMID 5k */
587                         wm8974_write(codec, WM8974_POWER1, power1 | 0x3);
588                         mdelay(100);
589                 }
590
591                 power1 |= 0x2;  /* VMID 500k */
592                 wm8974_write(codec, WM8974_POWER1, power1);
593                 break;
594
595         case SND_SOC_BIAS_OFF:
596                 wm8974_write(codec, WM8974_POWER1, 0);
597                 wm8974_write(codec, WM8974_POWER2, 0);
598                 wm8974_write(codec, WM8974_POWER3, 0);
599                 break;
600         }
601
602         codec->bias_level = level;
603         return 0;
604 }
605
606 #define WM8974_RATES (SNDRV_PCM_RATE_8000_48000)
607
608 #define WM8974_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
609         SNDRV_PCM_FMTBIT_S24_LE)
610
611 static struct snd_soc_dai_ops wm8974_ops = {
612         .hw_params = wm8974_pcm_hw_params,
613         .digital_mute = wm8974_mute,
614         .set_fmt = wm8974_set_dai_fmt,
615         .set_clkdiv = wm8974_set_dai_clkdiv,
616         .set_pll = wm8974_set_dai_pll,
617 };
618
619 struct snd_soc_dai wm8974_dai = {
620         .name = "WM8974 HiFi",
621         .playback = {
622                 .stream_name = "Playback",
623                 .channels_min = 1,
624                 .channels_max = 2,   /* Only 1 channel of data */
625                 .rates = WM8974_RATES,
626                 .formats = WM8974_FORMATS,},
627         .capture = {
628                 .stream_name = "Capture",
629                 .channels_min = 1,
630                 .channels_max = 2,   /* Only 1 channel of data */
631                 .rates = WM8974_RATES,
632                 .formats = WM8974_FORMATS,},
633         .ops = &wm8974_ops,
634         .symmetric_rates = 1,
635 };
636 EXPORT_SYMBOL_GPL(wm8974_dai);
637
638 static int wm8974_suspend(struct platform_device *pdev, pm_message_t state)
639 {
640         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
641         struct snd_soc_codec *codec = socdev->card->codec;
642
643         wm8974_set_bias_level(codec, SND_SOC_BIAS_OFF);
644         return 0;
645 }
646
647 static int wm8974_resume(struct platform_device *pdev)
648 {
649         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
650         struct snd_soc_codec *codec = socdev->card->codec;
651         int i;
652         u8 data[2];
653         u16 *cache = codec->reg_cache;
654
655         /* Sync reg_cache with the hardware */
656         for (i = 0; i < ARRAY_SIZE(wm8974_reg); i++) {
657                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
658                 data[1] = cache[i] & 0x00ff;
659                 codec->hw_write(codec->control_data, data, 2);
660         }
661         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
662         wm8974_set_bias_level(codec, codec->suspend_bias_level);
663         return 0;
664 }
665
666 static int wm8974_probe(struct platform_device *pdev)
667 {
668         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
669         struct snd_soc_codec *codec;
670         int ret = 0;
671
672         if (wm8974_codec == NULL) {
673                 dev_err(&pdev->dev, "Codec device not registered\n");
674                 return -ENODEV;
675         }
676
677         socdev->card->codec = wm8974_codec;
678         codec = wm8974_codec;
679
680         /* register pcms */
681         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
682         if (ret < 0) {
683                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
684                 goto pcm_err;
685         }
686
687         snd_soc_add_controls(codec, wm8974_snd_controls,
688                              ARRAY_SIZE(wm8974_snd_controls));
689         wm8974_add_widgets(codec);
690         ret = snd_soc_init_card(socdev);
691         if (ret < 0) {
692                 dev_err(codec->dev, "failed to register card: %d\n", ret);
693                 goto card_err;
694         }
695
696         return ret;
697
698 card_err:
699         snd_soc_free_pcms(socdev);
700         snd_soc_dapm_free(socdev);
701 pcm_err:
702         return ret;
703 }
704
705 /* power down chip */
706 static int wm8974_remove(struct platform_device *pdev)
707 {
708         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
709
710         snd_soc_free_pcms(socdev);
711         snd_soc_dapm_free(socdev);
712
713         return 0;
714 }
715
716 struct snd_soc_codec_device soc_codec_dev_wm8974 = {
717         .probe =        wm8974_probe,
718         .remove =       wm8974_remove,
719         .suspend =      wm8974_suspend,
720         .resume =       wm8974_resume,
721 };
722 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
723
724 static __devinit int wm8974_register(struct wm8974_priv *wm8974)
725 {
726         int ret;
727         struct snd_soc_codec *codec = &wm8974->codec;
728
729         if (wm8974_codec) {
730                 dev_err(codec->dev, "Another WM8974 is registered\n");
731                 return -EINVAL;
732         }
733
734         mutex_init(&codec->mutex);
735         INIT_LIST_HEAD(&codec->dapm_widgets);
736         INIT_LIST_HEAD(&codec->dapm_paths);
737
738         codec->private_data = wm8974;
739         codec->name = "WM8974";
740         codec->owner = THIS_MODULE;
741         codec->read = wm8974_read_reg_cache;
742         codec->write = wm8974_write;
743         codec->bias_level = SND_SOC_BIAS_OFF;
744         codec->set_bias_level = wm8974_set_bias_level;
745         codec->dai = &wm8974_dai;
746         codec->num_dai = 1;
747         codec->reg_cache_size = WM8974_CACHEREGNUM;
748         codec->reg_cache = &wm8974->reg_cache;
749
750         memcpy(codec->reg_cache, wm8974_reg, sizeof(wm8974_reg));
751
752         ret = wm8974_reset(codec);
753         if (ret < 0) {
754                 dev_err(codec->dev, "Failed to issue reset\n");
755                 return ret;
756         }
757
758         wm8974_dai.dev = codec->dev;
759
760         wm8974_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
761
762         wm8974_codec = codec;
763
764         ret = snd_soc_register_codec(codec);
765         if (ret != 0) {
766                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
767                 return ret;
768         }
769
770         ret = snd_soc_register_dai(&wm8974_dai);
771         if (ret != 0) {
772                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
773                 snd_soc_unregister_codec(codec);
774                 return ret;
775         }
776
777         return 0;
778 }
779
780 static __devexit void wm8974_unregister(struct wm8974_priv *wm8974)
781 {
782         wm8974_set_bias_level(&wm8974->codec, SND_SOC_BIAS_OFF);
783         snd_soc_unregister_dai(&wm8974_dai);
784         snd_soc_unregister_codec(&wm8974->codec);
785         kfree(wm8974);
786         wm8974_codec = NULL;
787 }
788
789 static __devinit int wm8974_i2c_probe(struct i2c_client *i2c,
790                                       const struct i2c_device_id *id)
791 {
792         struct wm8974_priv *wm8974;
793         struct snd_soc_codec *codec;
794
795         wm8974 = kzalloc(sizeof(struct wm8974_priv), GFP_KERNEL);
796         if (wm8974 == NULL)
797                 return -ENOMEM;
798
799         codec = &wm8974->codec;
800         codec->hw_write = (hw_write_t)i2c_master_send;
801
802         i2c_set_clientdata(i2c, wm8974);
803         codec->control_data = i2c;
804
805         codec->dev = &i2c->dev;
806
807         return wm8974_register(wm8974);
808 }
809
810 static __devexit int wm8974_i2c_remove(struct i2c_client *client)
811 {
812         struct wm8974_priv *wm8974 = i2c_get_clientdata(client);
813         wm8974_unregister(wm8974);
814         return 0;
815 }
816
817 static const struct i2c_device_id wm8974_i2c_id[] = {
818         { "wm8974", 0 },
819         { }
820 };
821 MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
822
823 static struct i2c_driver wm8974_i2c_driver = {
824         .driver = {
825                 .name = "WM8974",
826                 .owner = THIS_MODULE,
827         },
828         .probe =    wm8974_i2c_probe,
829         .remove =   __devexit_p(wm8974_i2c_remove),
830         .id_table = wm8974_i2c_id,
831 };
832
833 static int __init wm8974_modinit(void)
834 {
835         return i2c_add_driver(&wm8974_i2c_driver);
836 }
837 module_init(wm8974_modinit);
838
839 static void __exit wm8974_exit(void)
840 {
841         i2c_del_driver(&wm8974_i2c_driver);
842 }
843 module_exit(wm8974_exit);
844
845 MODULE_DESCRIPTION("ASoC WM8974 driver");
846 MODULE_AUTHOR("Liam Girdwood");
847 MODULE_LICENSE("GPL");