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 Bandwith", 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 Bandwith", 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 Bandwith", 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 Bandwith", 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
pll_factors(struct pll_ * pll_div,unsigned int target,unsigned int source)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
wm8974_set_dai_pll(struct snd_soc_dai * codec_dai,int pll_id,int source,unsigned int freq_in,unsigned int freq_out)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 */
wm8974_set_dai_clkdiv(struct snd_soc_dai * codec_dai,int div_id,int div)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
wm8974_set_dai_fmt(struct snd_soc_dai * codec_dai,unsigned int fmt)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
wm8974_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)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
wm8974_mute(struct snd_soc_dai * dai,int mute)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 */
wm8974_set_bias_level(struct snd_soc_codec * codec,enum snd_soc_bias_level level)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
wm8974_suspend(struct snd_soc_codec * codec)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
wm8974_resume(struct snd_soc_codec * codec)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
wm8974_probe(struct snd_soc_codec * codec)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 */
wm8974_remove(struct snd_soc_codec * codec)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
wm8974_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)628 static __devinit 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
wm8974_i2c_remove(struct i2c_client * client)639 static __devexit 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 = __devexit_p(wm8974_i2c_remove),
659 .id_table = wm8974_i2c_id,
660 };
661
wm8974_modinit(void)662 static int __init wm8974_modinit(void)
663 {
664 int ret = 0;
665 ret = i2c_add_driver(&wm8974_i2c_driver);
666 if (ret != 0) {
667 printk(KERN_ERR "Failed to register wm8974 I2C driver: %d\n",
668 ret);
669 }
670 return ret;
671 }
672 module_init(wm8974_modinit);
673
wm8974_exit(void)674 static void __exit wm8974_exit(void)
675 {
676 i2c_del_driver(&wm8974_i2c_driver);
677 }
678 module_exit(wm8974_exit);
679
680 MODULE_DESCRIPTION("ASoC WM8974 driver");
681 MODULE_AUTHOR("Liam Girdwood");
682 MODULE_LICENSE("GPL");
683