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24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/kernel.h>
27#include <linux/init.h>
28#include <linux/delay.h>
29#include <linux/pm.h>
30#include <linux/i2c.h>
31#include <linux/regmap.h>
32#include <linux/slab.h>
33#include <sound/core.h>
34#include <sound/pcm.h>
35#include <sound/pcm_params.h>
36#include <sound/soc.h>
37#include <sound/initval.h>
38#include <sound/tlv.h>
39
40#include "wm8940.h"
41
42struct wm8940_priv {
43 unsigned int sysclk;
44 struct regmap *regmap;
45};
46
47static bool wm8940_volatile_register(struct device *dev, unsigned int reg)
48{
49 switch (reg) {
50 case WM8940_SOFTRESET:
51 return true;
52 default:
53 return false;
54 }
55}
56
57static bool wm8940_readable_register(struct device *dev, unsigned int reg)
58{
59 switch (reg) {
60 case WM8940_SOFTRESET:
61 case WM8940_POWER1:
62 case WM8940_POWER2:
63 case WM8940_POWER3:
64 case WM8940_IFACE:
65 case WM8940_COMPANDINGCTL:
66 case WM8940_CLOCK:
67 case WM8940_ADDCNTRL:
68 case WM8940_GPIO:
69 case WM8940_CTLINT:
70 case WM8940_DAC:
71 case WM8940_DACVOL:
72 case WM8940_ADC:
73 case WM8940_ADCVOL:
74 case WM8940_NOTCH1:
75 case WM8940_NOTCH2:
76 case WM8940_NOTCH3:
77 case WM8940_NOTCH4:
78 case WM8940_NOTCH5:
79 case WM8940_NOTCH6:
80 case WM8940_NOTCH7:
81 case WM8940_NOTCH8:
82 case WM8940_DACLIM1:
83 case WM8940_DACLIM2:
84 case WM8940_ALC1:
85 case WM8940_ALC2:
86 case WM8940_ALC3:
87 case WM8940_NOISEGATE:
88 case WM8940_PLLN:
89 case WM8940_PLLK1:
90 case WM8940_PLLK2:
91 case WM8940_PLLK3:
92 case WM8940_ALC4:
93 case WM8940_INPUTCTL:
94 case WM8940_PGAGAIN:
95 case WM8940_ADCBOOST:
96 case WM8940_OUTPUTCTL:
97 case WM8940_SPKMIX:
98 case WM8940_SPKVOL:
99 case WM8940_MONOMIX:
100 return true;
101 default:
102 return false;
103 }
104}
105
106static const struct reg_default wm8940_reg_defaults[] = {
107 { 0x1, 0x0000 },
108 { 0x2, 0x0000 },
109 { 0x3, 0x0000 },
110 { 0x4, 0x0010 },
111 { 0x5, 0x0000 },
112 { 0x6, 0x0140 },
113 { 0x7, 0x0000 },
114 { 0x8, 0x0000 },
115 { 0x9, 0x0002 },
116 { 0xa, 0x0000 },
117 { 0xb, 0x00FF },
118
119 { 0xe, 0x0100 },
120 { 0xf, 0x00FF },
121 { 0x10, 0x0000 },
122 { 0x11, 0x0000 },
123 { 0x12, 0x0000 },
124 { 0x13, 0x0000 },
125 { 0x14, 0x0000 },
126 { 0x15, 0x0000 },
127 { 0x16, 0x0000 },
128 { 0x17, 0x0000 },
129 { 0x18, 0x0032 },
130 { 0x19, 0x0000 },
131
132 { 0x20, 0x0038 },
133 { 0x21, 0x000B },
134 { 0x22, 0x0032 },
135 { 0x23, 0x0000 },
136 { 0x24, 0x0041 },
137 { 0x25, 0x000C },
138 { 0x26, 0x0093 },
139 { 0x27, 0x00E9 },
140
141 { 0x2a, 0x0030 },
142
143 { 0x2c, 0x0002 },
144 { 0x2d, 0x0050 },
145
146 { 0x2f, 0x0002 },
147
148 { 0x31, 0x0002 },
149 { 0x32, 0x0000 },
150
151 { 0x36, 0x0079 },
152
153 { 0x38, 0x0000 },
154};
155
156static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
157static SOC_ENUM_SINGLE_DECL(wm8940_adc_companding_enum,
158 WM8940_COMPANDINGCTL, 1, wm8940_companding);
159static SOC_ENUM_SINGLE_DECL(wm8940_dac_companding_enum,
160 WM8940_COMPANDINGCTL, 3, wm8940_companding);
161
162static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
163static SOC_ENUM_SINGLE_DECL(wm8940_alc_mode_enum,
164 WM8940_ALC3, 8, wm8940_alc_mode_text);
165
166static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
167static SOC_ENUM_SINGLE_DECL(wm8940_mic_bias_level_enum,
168 WM8940_INPUTCTL, 8, wm8940_mic_bias_level_text);
169
170static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
171static SOC_ENUM_SINGLE_DECL(wm8940_filter_mode_enum,
172 WM8940_ADC, 7, wm8940_filter_mode_text);
173
174static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
175static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
176static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
177static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
178static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
179static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
180static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
181static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
182static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
183static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
184
185static const struct snd_kcontrol_new wm8940_snd_controls[] = {
186 SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
187 6, 1, 0),
188 SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
189 SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
190
191 SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
192 SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
193 SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
194 3, 7, 1, wm8940_alc_max_tlv),
195 SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
196 0, 7, 0, wm8940_alc_min_tlv),
197 SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
198 0, 14, 0, wm8940_alc_tar_tlv),
199 SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
200 SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
201 SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
202 SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
203 SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
204 3, 1, 0),
205 SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
206 0, 7, 0),
207
208 SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
209 SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
210 SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
211 SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
212 4, 9, 1, wm8940_lim_thresh_tlv),
213 SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
214 0, 12, 0, wm8940_lim_boost_tlv),
215
216 SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
217 SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
218 0, 63, 0, wm8940_pga_vol_tlv),
219 SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
220 0, 255, 0, wm8940_adc_tlv),
221 SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
222 0, 255, 0, wm8940_adc_tlv),
223 SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
224 SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
225 8, 1, 0, wm8940_capture_boost_vol_tlv),
226 SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
227 0, 63, 0, wm8940_spk_vol_tlv),
228 SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
229
230 SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
231 8, 1, 1, wm8940_att_tlv),
232 SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
233
234 SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
235 SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
236 7, 1, 1, wm8940_att_tlv),
237
238 SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
239 SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
240 SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
241 SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
242 SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
243 SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
244 SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
245};
246
247static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
248 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
249 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
250 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
251};
252
253static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
254 SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
255 SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
256 SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
257};
258
259static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
260static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
261 SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
262 SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
263 0, 7, 0, wm8940_boost_vol_tlv),
264 SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
265 4, 7, 0, wm8940_boost_vol_tlv),
266};
267
268static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
269 SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
270 SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
271 SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
272};
273
274static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
275 SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
276 &wm8940_speaker_mixer_controls[0],
277 ARRAY_SIZE(wm8940_speaker_mixer_controls)),
278 SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
279 &wm8940_mono_mixer_controls[0],
280 ARRAY_SIZE(wm8940_mono_mixer_controls)),
281 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
282
283 SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
284 SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
285 SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
286 SND_SOC_DAPM_OUTPUT("MONOOUT"),
287 SND_SOC_DAPM_OUTPUT("SPKOUTP"),
288 SND_SOC_DAPM_OUTPUT("SPKOUTN"),
289
290 SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
291 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
292 SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
293 &wm8940_micpga_controls[0],
294 ARRAY_SIZE(wm8940_micpga_controls)),
295 SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
296 &wm8940_input_boost_controls[0],
297 ARRAY_SIZE(wm8940_input_boost_controls)),
298 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
299
300 SND_SOC_DAPM_INPUT("MICN"),
301 SND_SOC_DAPM_INPUT("MICP"),
302 SND_SOC_DAPM_INPUT("AUX"),
303};
304
305static const struct snd_soc_dapm_route wm8940_dapm_routes[] = {
306
307 {"Mono Mixer", "PCM Playback Switch", "DAC"},
308 {"Mono Mixer", "Aux Playback Switch", "Aux Input"},
309 {"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
310
311
312 {"Speaker Mixer", "PCM Playback Switch", "DAC"},
313 {"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
314 {"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
315
316
317 {"Mono Out", NULL, "Mono Mixer"},
318 {"MONOOUT", NULL, "Mono Out"},
319 {"SpkN Out", NULL, "Speaker Mixer"},
320 {"SpkP Out", NULL, "Speaker Mixer"},
321 {"SPKOUTN", NULL, "SpkN Out"},
322 {"SPKOUTP", NULL, "SpkP Out"},
323
324
325 {"Mic PGA", "MICN Switch", "MICN"},
326 {"Mic PGA", "MICP Switch", "MICP"},
327 {"Mic PGA", "AUX Switch", "AUX"},
328
329
330 {"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
331 {"Boost Mixer", "Mic Volume", "MICP"},
332 {"Boost Mixer", "Aux Volume", "Aux Input"},
333
334 {"ADC", NULL, "Boost Mixer"},
335};
336
337#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
338
339static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
340 unsigned int fmt)
341{
342 struct snd_soc_codec *codec = codec_dai->codec;
343 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
344 u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
345
346 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
347 case SND_SOC_DAIFMT_CBM_CFM:
348 clk |= 1;
349 break;
350 case SND_SOC_DAIFMT_CBS_CFS:
351 break;
352 default:
353 return -EINVAL;
354 }
355 snd_soc_write(codec, WM8940_CLOCK, clk);
356
357 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
358 case SND_SOC_DAIFMT_I2S:
359 iface |= (2 << 3);
360 break;
361 case SND_SOC_DAIFMT_LEFT_J:
362 iface |= (1 << 3);
363 break;
364 case SND_SOC_DAIFMT_RIGHT_J:
365 break;
366 case SND_SOC_DAIFMT_DSP_A:
367 iface |= (3 << 3);
368 break;
369 case SND_SOC_DAIFMT_DSP_B:
370 iface |= (3 << 3) | (1 << 7);
371 break;
372 }
373
374 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
375 case SND_SOC_DAIFMT_NB_NF:
376 break;
377 case SND_SOC_DAIFMT_NB_IF:
378 iface |= (1 << 7);
379 break;
380 case SND_SOC_DAIFMT_IB_NF:
381 iface |= (1 << 8);
382 break;
383 case SND_SOC_DAIFMT_IB_IF:
384 iface |= (1 << 8) | (1 << 7);
385 break;
386 }
387
388 snd_soc_write(codec, WM8940_IFACE, iface);
389
390 return 0;
391}
392
393static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
394 struct snd_pcm_hw_params *params,
395 struct snd_soc_dai *dai)
396{
397 struct snd_soc_codec *codec = dai->codec;
398 u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
399 u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
400 u16 companding = snd_soc_read(codec,
401 WM8940_COMPANDINGCTL) & 0xFFDF;
402 int ret;
403
404
405 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
406 && params_channels(params) == 2)
407 iface |= (1 << 9);
408
409 switch (params_rate(params)) {
410 case 8000:
411 addcntrl |= (0x5 << 1);
412 break;
413 case 11025:
414 addcntrl |= (0x4 << 1);
415 break;
416 case 16000:
417 addcntrl |= (0x3 << 1);
418 break;
419 case 22050:
420 addcntrl |= (0x2 << 1);
421 break;
422 case 32000:
423 addcntrl |= (0x1 << 1);
424 break;
425 case 44100:
426 case 48000:
427 break;
428 }
429 ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
430 if (ret)
431 goto error_ret;
432
433 switch (params_width(params)) {
434 case 8:
435 companding = companding | (1 << 5);
436 break;
437 case 16:
438 break;
439 case 20:
440 iface |= (1 << 5);
441 break;
442 case 24:
443 iface |= (2 << 5);
444 break;
445 case 32:
446 iface |= (3 << 5);
447 break;
448 }
449 ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
450 if (ret)
451 goto error_ret;
452 ret = snd_soc_write(codec, WM8940_IFACE, iface);
453
454error_ret:
455 return ret;
456}
457
458static int wm8940_mute(struct snd_soc_dai *dai, int mute)
459{
460 struct snd_soc_codec *codec = dai->codec;
461 u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
462
463 if (mute)
464 mute_reg |= 0x40;
465
466 return snd_soc_write(codec, WM8940_DAC, mute_reg);
467}
468
469static int wm8940_set_bias_level(struct snd_soc_codec *codec,
470 enum snd_soc_bias_level level)
471{
472 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
473 u16 val;
474 u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
475 int ret = 0;
476
477 switch (level) {
478 case SND_SOC_BIAS_ON:
479
480 pwr_reg |= (1 << 2) | (1 << 3);
481
482 val = snd_soc_read(codec, WM8940_OUTPUTCTL);
483 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
484 if (ret)
485 break;
486
487 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
488 break;
489 case SND_SOC_BIAS_PREPARE:
490
491 pwr_reg |= (1 << 2) | (1 << 3);
492 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
493 break;
494 case SND_SOC_BIAS_STANDBY:
495 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
496 ret = regcache_sync(wm8940->regmap);
497 if (ret < 0) {
498 dev_err(codec->dev, "Failed to sync cache: %d\n", ret);
499 return ret;
500 }
501 }
502
503
504 pwr_reg |= (1 << 2) | (1 << 3);
505
506 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
507 break;
508 case SND_SOC_BIAS_OFF:
509 ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
510 break;
511 }
512
513 return ret;
514}
515
516struct pll_ {
517 unsigned int pre_scale:2;
518 unsigned int n:4;
519 unsigned int k;
520};
521
522static struct pll_ pll_div;
523
524
525
526#define FIXED_PLL_SIZE ((1 << 24) * 10)
527static void pll_factors(unsigned int target, unsigned int source)
528{
529 unsigned long long Kpart;
530 unsigned int K, Ndiv, Nmod;
531
532 Ndiv = target / source;
533
534 if (Ndiv > 12) {
535 source <<= 1;
536
537 pll_div.pre_scale = 0;
538 Ndiv = target / source;
539 } else if (Ndiv < 3) {
540 source >>= 2;
541
542 pll_div.pre_scale = 3;
543 Ndiv = target / source;
544 } else if (Ndiv < 6) {
545 source >>= 1;
546
547 pll_div.pre_scale = 2;
548 Ndiv = target / source;
549 } else
550 pll_div.pre_scale = 1;
551
552 if ((Ndiv < 6) || (Ndiv > 12))
553 printk(KERN_WARNING
554 "WM8940 N value %d outwith recommended range!d\n",
555 Ndiv);
556
557 pll_div.n = Ndiv;
558 Nmod = target % source;
559 Kpart = FIXED_PLL_SIZE * (long long)Nmod;
560
561 do_div(Kpart, source);
562
563 K = Kpart & 0xFFFFFFFF;
564
565
566 if ((K % 10) >= 5)
567 K += 5;
568
569
570 K /= 10;
571
572 pll_div.k = K;
573}
574
575
576static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
577 int source, unsigned int freq_in, unsigned int freq_out)
578{
579 struct snd_soc_codec *codec = codec_dai->codec;
580 u16 reg;
581
582
583 reg = snd_soc_read(codec, WM8940_POWER1);
584 snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
585
586 if (freq_in == 0 || freq_out == 0) {
587
588 reg = snd_soc_read(codec, WM8940_CLOCK);
589 snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
590
591 snd_soc_write(codec, WM8940_PLLN, (1 << 7));
592 return 0;
593 }
594
595
596 pll_factors(freq_out*4, freq_in);
597 if (pll_div.k)
598 snd_soc_write(codec, WM8940_PLLN,
599 (pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
600 else
601 snd_soc_write(codec, WM8940_PLLN,
602 (pll_div.pre_scale << 4) | pll_div.n);
603 snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
604 snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
605 snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
606
607 reg = snd_soc_read(codec, WM8940_POWER1);
608 snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
609
610
611 reg = snd_soc_read(codec, WM8940_CLOCK);
612 snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
613
614 return 0;
615}
616
617static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
618 int clk_id, unsigned int freq, int dir)
619{
620 struct snd_soc_codec *codec = codec_dai->codec;
621 struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
622
623 switch (freq) {
624 case 11289600:
625 case 12000000:
626 case 12288000:
627 case 16934400:
628 case 18432000:
629 wm8940->sysclk = freq;
630 return 0;
631 }
632 return -EINVAL;
633}
634
635static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
636 int div_id, int div)
637{
638 struct snd_soc_codec *codec = codec_dai->codec;
639 u16 reg;
640 int ret = 0;
641
642 switch (div_id) {
643 case WM8940_BCLKDIV:
644 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFE3;
645 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
646 break;
647 case WM8940_MCLKDIV:
648 reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
649 ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
650 break;
651 case WM8940_OPCLKDIV:
652 reg = snd_soc_read(codec, WM8940_GPIO) & 0xFFCF;
653 ret = snd_soc_write(codec, WM8940_GPIO, reg | (div << 4));
654 break;
655 }
656 return ret;
657}
658
659#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
660
661#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
662 SNDRV_PCM_FMTBIT_S16_LE | \
663 SNDRV_PCM_FMTBIT_S20_3LE | \
664 SNDRV_PCM_FMTBIT_S24_LE | \
665 SNDRV_PCM_FMTBIT_S32_LE)
666
667static const struct snd_soc_dai_ops wm8940_dai_ops = {
668 .hw_params = wm8940_i2s_hw_params,
669 .set_sysclk = wm8940_set_dai_sysclk,
670 .digital_mute = wm8940_mute,
671 .set_fmt = wm8940_set_dai_fmt,
672 .set_clkdiv = wm8940_set_dai_clkdiv,
673 .set_pll = wm8940_set_dai_pll,
674};
675
676static struct snd_soc_dai_driver wm8940_dai = {
677 .name = "wm8940-hifi",
678 .playback = {
679 .stream_name = "Playback",
680 .channels_min = 1,
681 .channels_max = 2,
682 .rates = WM8940_RATES,
683 .formats = WM8940_FORMATS,
684 },
685 .capture = {
686 .stream_name = "Capture",
687 .channels_min = 1,
688 .channels_max = 2,
689 .rates = WM8940_RATES,
690 .formats = WM8940_FORMATS,
691 },
692 .ops = &wm8940_dai_ops,
693 .symmetric_rates = 1,
694};
695
696static int wm8940_probe(struct snd_soc_codec *codec)
697{
698 struct wm8940_setup_data *pdata = codec->dev->platform_data;
699 int ret;
700 u16 reg;
701
702 ret = wm8940_reset(codec);
703 if (ret < 0) {
704 dev_err(codec->dev, "Failed to issue reset\n");
705 return ret;
706 }
707
708 snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_STANDBY);
709
710 ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
711 if (ret < 0)
712 return ret;
713
714 if (!pdata)
715 dev_warn(codec->dev, "No platform data supplied\n");
716 else {
717 reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
718 ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
719 if (ret < 0)
720 return ret;
721 }
722
723 return ret;
724}
725
726static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
727 .probe = wm8940_probe,
728 .set_bias_level = wm8940_set_bias_level,
729 .suspend_bias_off = true,
730
731 .controls = wm8940_snd_controls,
732 .num_controls = ARRAY_SIZE(wm8940_snd_controls),
733 .dapm_widgets = wm8940_dapm_widgets,
734 .num_dapm_widgets = ARRAY_SIZE(wm8940_dapm_widgets),
735 .dapm_routes = wm8940_dapm_routes,
736 .num_dapm_routes = ARRAY_SIZE(wm8940_dapm_routes),
737};
738
739static const struct regmap_config wm8940_regmap = {
740 .reg_bits = 8,
741 .val_bits = 16,
742
743 .max_register = WM8940_MONOMIX,
744 .reg_defaults = wm8940_reg_defaults,
745 .num_reg_defaults = ARRAY_SIZE(wm8940_reg_defaults),
746
747 .readable_reg = wm8940_readable_register,
748 .volatile_reg = wm8940_volatile_register,
749};
750
751static int wm8940_i2c_probe(struct i2c_client *i2c,
752 const struct i2c_device_id *id)
753{
754 struct wm8940_priv *wm8940;
755 int ret;
756
757 wm8940 = devm_kzalloc(&i2c->dev, sizeof(struct wm8940_priv),
758 GFP_KERNEL);
759 if (wm8940 == NULL)
760 return -ENOMEM;
761
762 wm8940->regmap = devm_regmap_init_i2c(i2c, &wm8940_regmap);
763 if (IS_ERR(wm8940->regmap))
764 return PTR_ERR(wm8940->regmap);
765
766 i2c_set_clientdata(i2c, wm8940);
767
768 ret = snd_soc_register_codec(&i2c->dev,
769 &soc_codec_dev_wm8940, &wm8940_dai, 1);
770
771 return ret;
772}
773
774static int wm8940_i2c_remove(struct i2c_client *client)
775{
776 snd_soc_unregister_codec(&client->dev);
777
778 return 0;
779}
780
781static const struct i2c_device_id wm8940_i2c_id[] = {
782 { "wm8940", 0 },
783 { }
784};
785MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
786
787static struct i2c_driver wm8940_i2c_driver = {
788 .driver = {
789 .name = "wm8940",
790 },
791 .probe = wm8940_i2c_probe,
792 .remove = wm8940_i2c_remove,
793 .id_table = wm8940_i2c_id,
794};
795
796module_i2c_driver(wm8940_i2c_driver);
797
798MODULE_DESCRIPTION("ASoC WM8940 driver");
799MODULE_AUTHOR("Jonathan Cameron");
800MODULE_LICENSE("GPL");
801
