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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
31static 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 0x10
51
52struct wm8974_priv {
53 struct snd_soc_codec codec;
54 u16 reg_cache[WM8974_CACHEREGNUM];
55};
56
57static struct snd_soc_codec *wm8974_codec;
58
59#define wm8974_reset(c) snd_soc_write(c, WM8974_RESET, 0)
60
61static const char *wm8974_companding[] = {"Off", "NC", "u-law", "A-law" };
62static const char *wm8974_deemp[] = {"None", "32kHz", "44.1kHz", "48kHz" };
63static const char *wm8974_eqmode[] = {"Capture", "Playback" };
64static const char *wm8974_bw[] = {"Narrow", "Wide" };
65static const char *wm8974_eq1[] = {"80Hz", "105Hz", "135Hz", "175Hz" };
66static const char *wm8974_eq2[] = {"230Hz", "300Hz", "385Hz", "500Hz" };
67static const char *wm8974_eq3[] = {"650Hz", "850Hz", "1.1kHz", "1.4kHz" };
68static const char *wm8974_eq4[] = {"1.8kHz", "2.4kHz", "3.2kHz", "4.1kHz" };
69static const char *wm8974_eq5[] = {"5.3kHz", "6.9kHz", "9kHz", "11.7kHz" };
70static const char *wm8974_alc[] = {"ALC", "Limiter" };
71
72static const struct soc_enum wm8974_enum[] = {
73 SOC_ENUM_SINGLE(WM8974_COMP, 1, 4, wm8974_companding),
74 SOC_ENUM_SINGLE(WM8974_COMP, 3, 4, wm8974_companding),
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
92static const char *wm8974_auxmode_text[] = { "Buffer", "Mixer" };
93
94static const struct soc_enum wm8974_auxmode =
95 SOC_ENUM_SINGLE(WM8974_INPUT, 3, 2, wm8974_auxmode_text);
96
97static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
98static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
99static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
100static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
101
102static const struct snd_kcontrol_new wm8974_snd_controls[] = {
103
104SOC_SINGLE("Digital Loopback Switch", WM8974_COMP, 0, 1, 0),
105
106SOC_ENUM("DAC Companding", wm8974_enum[1]),
107SOC_ENUM("ADC Companding", wm8974_enum[0]),
108
109SOC_ENUM("Playback De-emphasis", wm8974_enum[2]),
110SOC_SINGLE("DAC Inversion Switch", WM8974_DAC, 0, 1, 0),
111
112SOC_SINGLE_TLV("PCM Volume", WM8974_DACVOL, 0, 255, 0, digital_tlv),
113
114SOC_SINGLE("High Pass Filter Switch", WM8974_ADC, 8, 1, 0),
115SOC_SINGLE("High Pass Cut Off", WM8974_ADC, 4, 7, 0),
116SOC_SINGLE("ADC Inversion Switch", WM8974_ADC, 0, 1, 0),
117
118SOC_SINGLE_TLV("Capture Volume", WM8974_ADCVOL, 0, 255, 0, digital_tlv),
119
120SOC_ENUM("Equaliser Function", wm8974_enum[3]),
121SOC_ENUM("EQ1 Cut Off", wm8974_enum[4]),
122SOC_SINGLE_TLV("EQ1 Volume", WM8974_EQ1, 0, 24, 1, eq_tlv),
123
124SOC_ENUM("Equaliser EQ2 Bandwith", wm8974_enum[5]),
125SOC_ENUM("EQ2 Cut Off", wm8974_enum[6]),
126SOC_SINGLE_TLV("EQ2 Volume", WM8974_EQ2, 0, 24, 1, eq_tlv),
127
128SOC_ENUM("Equaliser EQ3 Bandwith", wm8974_enum[7]),
129SOC_ENUM("EQ3 Cut Off", wm8974_enum[8]),
130SOC_SINGLE_TLV("EQ3 Volume", WM8974_EQ3, 0, 24, 1, eq_tlv),
131
132SOC_ENUM("Equaliser EQ4 Bandwith", wm8974_enum[9]),
133SOC_ENUM("EQ4 Cut Off", wm8974_enum[10]),
134SOC_SINGLE_TLV("EQ4 Volume", WM8974_EQ4, 0, 24, 1, eq_tlv),
135
136SOC_ENUM("Equaliser EQ5 Bandwith", wm8974_enum[11]),
137SOC_ENUM("EQ5 Cut Off", wm8974_enum[12]),
138SOC_SINGLE_TLV("EQ5 Volume", WM8974_EQ5, 0, 24, 1, eq_tlv),
139
140SOC_SINGLE("DAC Playback Limiter Switch", WM8974_DACLIM1, 8, 1, 0),
141SOC_SINGLE("DAC Playback Limiter Decay", WM8974_DACLIM1, 4, 15, 0),
142SOC_SINGLE("DAC Playback Limiter Attack", WM8974_DACLIM1, 0, 15, 0),
143
144SOC_SINGLE("DAC Playback Limiter Threshold", WM8974_DACLIM2, 4, 7, 0),
145SOC_SINGLE("DAC Playback Limiter Boost", WM8974_DACLIM2, 0, 15, 0),
146
147SOC_SINGLE("ALC Enable Switch", WM8974_ALC1, 8, 1, 0),
148SOC_SINGLE("ALC Capture Max Gain", WM8974_ALC1, 3, 7, 0),
149SOC_SINGLE("ALC Capture Min Gain", WM8974_ALC1, 0, 7, 0),
150
151SOC_SINGLE("ALC Capture ZC Switch", WM8974_ALC2, 8, 1, 0),
152SOC_SINGLE("ALC Capture Hold", WM8974_ALC2, 4, 7, 0),
153SOC_SINGLE("ALC Capture Target", WM8974_ALC2, 0, 15, 0),
154
155SOC_ENUM("ALC Capture Mode", wm8974_enum[13]),
156SOC_SINGLE("ALC Capture Decay", WM8974_ALC3, 4, 15, 0),
157SOC_SINGLE("ALC Capture Attack", WM8974_ALC3, 0, 15, 0),
158
159SOC_SINGLE("ALC Capture Noise Gate Switch", WM8974_NGATE, 3, 1, 0),
160SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8974_NGATE, 0, 7, 0),
161
162SOC_SINGLE("Capture PGA ZC Switch", WM8974_INPPGA, 7, 1, 0),
163SOC_SINGLE_TLV("Capture PGA Volume", WM8974_INPPGA, 0, 63, 0, inpga_tlv),
164
165SOC_SINGLE("Speaker Playback ZC Switch", WM8974_SPKVOL, 7, 1, 0),
166SOC_SINGLE("Speaker Playback Switch", WM8974_SPKVOL, 6, 1, 1),
167SOC_SINGLE_TLV("Speaker Playback Volume", WM8974_SPKVOL, 0, 63, 0, spk_tlv),
168
169SOC_ENUM("Aux Mode", wm8974_auxmode),
170
171SOC_SINGLE("Capture Boost(+20dB)", WM8974_ADCBOOST, 8, 1, 0),
172SOC_SINGLE("Mono Playback Switch", WM8974_MONOMIX, 6, 1, 1),
173};
174
175
176static const struct snd_kcontrol_new wm8974_speaker_mixer_controls[] = {
177SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_SPKMIX, 1, 1, 0),
178SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_SPKMIX, 5, 1, 0),
179SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_SPKMIX, 0, 1, 1),
180};
181
182
183static const struct snd_kcontrol_new wm8974_mono_mixer_controls[] = {
184SOC_DAPM_SINGLE("Line Bypass Switch", WM8974_MONOMIX, 1, 1, 0),
185SOC_DAPM_SINGLE("Aux Playback Switch", WM8974_MONOMIX, 2, 1, 0),
186SOC_DAPM_SINGLE("PCM Playback Switch", WM8974_MONOMIX, 0, 1, 0),
187};
188
189
190static const struct snd_kcontrol_new wm8974_boost_mixer[] = {
191SOC_DAPM_SINGLE("Aux Switch", WM8974_INPPGA, 6, 1, 0),
192};
193
194
195static const struct snd_kcontrol_new wm8974_inpga[] = {
196SOC_DAPM_SINGLE("Aux Switch", WM8974_INPUT, 2, 1, 0),
197SOC_DAPM_SINGLE("MicN Switch", WM8974_INPUT, 1, 1, 0),
198SOC_DAPM_SINGLE("MicP Switch", WM8974_INPUT, 0, 1, 0),
199};
200
201
202static const struct snd_kcontrol_new wm8974_aux_boost_controls =
203SOC_DAPM_SINGLE("Aux Volume", WM8974_ADCBOOST, 0, 7, 0);
204
205
206static const struct snd_kcontrol_new wm8974_mic_boost_controls =
207SOC_DAPM_SINGLE("Mic Volume", WM8974_ADCBOOST, 4, 7, 0);
208
209static const struct snd_soc_dapm_widget wm8974_dapm_widgets[] = {
210SND_SOC_DAPM_MIXER("Speaker Mixer", WM8974_POWER3, 2, 0,
211 &wm8974_speaker_mixer_controls[0],
212 ARRAY_SIZE(wm8974_speaker_mixer_controls)),
213SND_SOC_DAPM_MIXER("Mono Mixer", WM8974_POWER3, 3, 0,
214 &wm8974_mono_mixer_controls[0],
215 ARRAY_SIZE(wm8974_mono_mixer_controls)),
216SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8974_POWER3, 0, 0),
217SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8974_POWER2, 0, 0),
218SND_SOC_DAPM_PGA("Aux Input", WM8974_POWER1, 6, 0, NULL, 0),
219SND_SOC_DAPM_PGA("SpkN Out", WM8974_POWER3, 5, 0, NULL, 0),
220SND_SOC_DAPM_PGA("SpkP Out", WM8974_POWER3, 6, 0, NULL, 0),
221SND_SOC_DAPM_PGA("Mono Out", WM8974_POWER3, 7, 0, NULL, 0),
222
223SND_SOC_DAPM_MIXER("Input PGA", WM8974_POWER2, 2, 0, wm8974_inpga,
224 ARRAY_SIZE(wm8974_inpga)),
225SND_SOC_DAPM_MIXER("Boost Mixer", WM8974_POWER2, 4, 0,
226 wm8974_boost_mixer, ARRAY_SIZE(wm8974_boost_mixer)),
227
228SND_SOC_DAPM_MICBIAS("Mic Bias", WM8974_POWER1, 4, 0),
229
230SND_SOC_DAPM_INPUT("MICN"),
231SND_SOC_DAPM_INPUT("MICP"),
232SND_SOC_DAPM_INPUT("AUX"),
233SND_SOC_DAPM_OUTPUT("MONOOUT"),
234SND_SOC_DAPM_OUTPUT("SPKOUTP"),
235SND_SOC_DAPM_OUTPUT("SPKOUTN"),
236};
237
238static const struct snd_soc_dapm_route audio_map[] = {
239
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
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
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
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
264 {"Input PGA", "Aux Switch", "Aux Input"},
265 {"Input PGA", "MicN Switch", "MICN"},
266 {"Input PGA", "MicP Switch", "MICP"},
267
268
269 {"Aux Input", NULL, "AUX"},
270};
271
272static 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
283struct pll_ {
284 unsigned int pre_div:4;
285 unsigned int n:4;
286 unsigned int k;
287};
288
289static struct pll_ pll_div;
290
291
292
293#define FIXED_PLL_SIZE ((1 << 24) * 10)
294
295static 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
322 if ((K % 10) >= 5)
323 K += 5;
324
325
326 K /= 10;
327
328 pll_div.k = K;
329}
330
331static 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
339 reg = snd_soc_read(codec, WM8974_CLOCK);
340 snd_soc_write(codec, WM8974_CLOCK, reg & 0x0ff);
341
342
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
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
366
367static 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
401static 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
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
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
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
458static 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
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
482 switch (params_rate(params)) {
483 case SNDRV_PCM_RATE_8000:
484 adn |= 0x5 << 1;
485 break;
486 case SNDRV_PCM_RATE_11025:
487 adn |= 0x4 << 1;
488 break;
489 case SNDRV_PCM_RATE_16000:
490 adn |= 0x3 << 1;
491 break;
492 case SNDRV_PCM_RATE_22050:
493 adn |= 0x2 << 1;
494 break;
495 case SNDRV_PCM_RATE_32000:
496 adn |= 0x1 << 1;
497 break;
498 case SNDRV_PCM_RATE_44100:
499 case SNDRV_PCM_RATE_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
508static 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
521static 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;
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
538 snd_soc_write(codec, WM8974_POWER1, power1 | 0x3);
539 mdelay(100);
540 }
541
542 power1 |= 0x2;
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
562static 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
570struct snd_soc_dai wm8974_dai = {
571 .name = "WM8974 HiFi",
572 .playback = {
573 .stream_name = "Playback",
574 .channels_min = 1,
575 .channels_max = 2,
576 .rates = WM8974_RATES,
577 .formats = WM8974_FORMATS,},
578 .capture = {
579 .stream_name = "Capture",
580 .channels_min = 1,
581 .channels_max = 2,
582 .rates = WM8974_RATES,
583 .formats = WM8974_FORMATS,},
584 .ops = &wm8974_ops,
585 .symmetric_rates = 1,
586};
587EXPORT_SYMBOL_GPL(wm8974_dai);
588
589static 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
598static 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
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
617static 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
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
649card_err:
650 snd_soc_free_pcms(socdev);
651 snd_soc_dapm_free(socdev);
652pcm_err:
653 return ret;
654}
655
656
657static 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
667struct 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};
673EXPORT_SYMBOL_GPL(soc_codec_dev_wm8974);
674
675static __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
733err_codec:
734 snd_soc_unregister_codec(codec);
735err:
736 kfree(wm8974);
737 return ret;
738}
739
740static __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
749static __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
770static __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
777static const struct i2c_device_id wm8974_i2c_id[] = {
778 { "wm8974", 0 },
779 { }
780};
781MODULE_DEVICE_TABLE(i2c, wm8974_i2c_id);
782
783static 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
793static int __init wm8974_modinit(void)
794{
795 return i2c_add_driver(&wm8974_i2c_driver);
796}
797module_init(wm8974_modinit);
798
799static void __exit wm8974_exit(void)
800{
801 i2c_del_driver(&wm8974_i2c_driver);
802}
803module_exit(wm8974_exit);
804
805MODULE_DESCRIPTION("ASoC WM8974 driver");
806MODULE_AUTHOR("Liam Girdwood");
807MODULE_LICENSE("GPL");
808
