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16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/init.h>
19#include <linux/delay.h>
20#include <linux/pm.h>
21#include <linux/i2c.h>
22#include <linux/slab.h>
23#include <linux/regmap.h>
24#include <linux/regulator/consumer.h>
25#include <linux/spi/spi.h>
26#include <linux/of_device.h>
27#include <linux/mutex.h>
28#include <linux/clk.h>
29#include <sound/core.h>
30#include <sound/pcm.h>
31#include <sound/pcm_params.h>
32#include <sound/soc.h>
33#include <sound/initval.h>
34#include <sound/tlv.h>
35
36#include "wm8731.h"
37
38#define WM8731_NUM_SUPPLIES 4
39static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
40 "AVDD",
41 "HPVDD",
42 "DCVDD",
43 "DBVDD",
44};
45
46
47struct wm8731_priv {
48 struct regmap *regmap;
49 struct clk *mclk;
50 struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
51 const struct snd_pcm_hw_constraint_list *constraints;
52 unsigned int sysclk;
53 int sysclk_type;
54 int playback_fs;
55 bool deemph;
56
57 struct mutex lock;
58};
59
60
61
62
63
64static const struct reg_default wm8731_reg_defaults[] = {
65 { 0, 0x0097 },
66 { 1, 0x0097 },
67 { 2, 0x0079 },
68 { 3, 0x0079 },
69 { 4, 0x000a },
70 { 5, 0x0008 },
71 { 6, 0x009f },
72 { 7, 0x000a },
73 { 8, 0x0000 },
74 { 9, 0x0000 },
75};
76
77static bool wm8731_volatile(struct device *dev, unsigned int reg)
78{
79 return reg == WM8731_RESET;
80}
81
82#define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0)
83
84static const char *wm8731_input_select[] = {"Line In", "Mic"};
85
86static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
87 WM8731_APANA, 2, wm8731_input_select);
88
89static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
90
91static int wm8731_set_deemph(struct snd_soc_codec *codec)
92{
93 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
94 int val, i, best;
95
96
97
98
99 if (wm8731->deemph) {
100 best = 1;
101 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
102 if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
103 abs(wm8731_deemph[best] - wm8731->playback_fs))
104 best = i;
105 }
106
107 val = best << 1;
108 } else {
109 best = 0;
110 val = 0;
111 }
112
113 dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
114 best, wm8731_deemph[best]);
115
116 return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
117}
118
119static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
120 struct snd_ctl_elem_value *ucontrol)
121{
122 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
123 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
124
125 ucontrol->value.integer.value[0] = wm8731->deemph;
126
127 return 0;
128}
129
130static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
131 struct snd_ctl_elem_value *ucontrol)
132{
133 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
134 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
135 unsigned int deemph = ucontrol->value.integer.value[0];
136 int ret = 0;
137
138 if (deemph > 1)
139 return -EINVAL;
140
141 mutex_lock(&wm8731->lock);
142 if (wm8731->deemph != deemph) {
143 wm8731->deemph = deemph;
144
145 wm8731_set_deemph(codec);
146
147 ret = 1;
148 }
149 mutex_unlock(&wm8731->lock);
150
151 return ret;
152}
153
154static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
155static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
156static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
157static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
158
159static const struct snd_kcontrol_new wm8731_snd_controls[] = {
160
161SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
162 0, 127, 0, out_tlv),
163SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
164 7, 1, 0),
165
166SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
167 in_tlv),
168SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
169
170SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
171SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
172
173SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
174 sidetone_tlv),
175
176SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
177SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
178
179SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
180 wm8731_get_deemph, wm8731_put_deemph),
181};
182
183
184static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
185SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
186SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
187SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
188};
189
190
191static const struct snd_kcontrol_new wm8731_input_mux_controls =
192SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
193
194static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
195SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
196SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
197SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
198 &wm8731_output_mixer_controls[0],
199 ARRAY_SIZE(wm8731_output_mixer_controls)),
200SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
201SND_SOC_DAPM_OUTPUT("LOUT"),
202SND_SOC_DAPM_OUTPUT("LHPOUT"),
203SND_SOC_DAPM_OUTPUT("ROUT"),
204SND_SOC_DAPM_OUTPUT("RHPOUT"),
205SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
206SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
207SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
208SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
209SND_SOC_DAPM_INPUT("MICIN"),
210SND_SOC_DAPM_INPUT("RLINEIN"),
211SND_SOC_DAPM_INPUT("LLINEIN"),
212};
213
214static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
215 struct snd_soc_dapm_widget *sink)
216{
217 struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
218 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
219
220 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
221}
222
223static const struct snd_soc_dapm_route wm8731_intercon[] = {
224 {"DAC", NULL, "OSC", wm8731_check_osc},
225 {"ADC", NULL, "OSC", wm8731_check_osc},
226 {"DAC", NULL, "ACTIVE"},
227 {"ADC", NULL, "ACTIVE"},
228
229
230 {"Output Mixer", "Line Bypass Switch", "Line Input"},
231 {"Output Mixer", "HiFi Playback Switch", "DAC"},
232 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
233
234
235 {"RHPOUT", NULL, "Output Mixer"},
236 {"ROUT", NULL, "Output Mixer"},
237 {"LHPOUT", NULL, "Output Mixer"},
238 {"LOUT", NULL, "Output Mixer"},
239
240
241 {"Input Mux", "Line In", "Line Input"},
242 {"Input Mux", "Mic", "Mic Bias"},
243 {"ADC", NULL, "Input Mux"},
244
245
246 {"Line Input", NULL, "LLINEIN"},
247 {"Line Input", NULL, "RLINEIN"},
248 {"Mic Bias", NULL, "MICIN"},
249};
250
251struct _coeff_div {
252 u32 mclk;
253 u32 rate;
254 u16 fs;
255 u8 sr:4;
256 u8 bosr:1;
257 u8 usb:1;
258};
259
260
261static const struct _coeff_div coeff_div[] = {
262
263 {12288000, 48000, 256, 0x0, 0x0, 0x0},
264 {18432000, 48000, 384, 0x0, 0x1, 0x0},
265 {12000000, 48000, 250, 0x0, 0x0, 0x1},
266
267
268 {12288000, 32000, 384, 0x6, 0x0, 0x0},
269 {18432000, 32000, 576, 0x6, 0x1, 0x0},
270 {12000000, 32000, 375, 0x6, 0x0, 0x1},
271
272
273 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
274 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
275 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
276 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
277 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
278
279
280 {12288000, 96000, 128, 0x7, 0x0, 0x0},
281 {18432000, 96000, 192, 0x7, 0x1, 0x0},
282 {12000000, 96000, 125, 0x7, 0x0, 0x1},
283
284
285 {11289600, 44100, 256, 0x8, 0x0, 0x0},
286 {16934400, 44100, 384, 0x8, 0x1, 0x0},
287 {12000000, 44100, 272, 0x8, 0x1, 0x1},
288
289
290 {11289600, 88200, 128, 0xf, 0x0, 0x0},
291 {16934400, 88200, 192, 0xf, 0x1, 0x0},
292 {12000000, 88200, 136, 0xf, 0x1, 0x1},
293};
294
295
296static const unsigned int wm8731_rates_12000000[] = {
297 8000, 32000, 44100, 48000, 96000, 88200,
298};
299
300static const unsigned int wm8731_rates_12288000_18432000[] = {
301 8000, 32000, 48000, 96000,
302};
303
304static const unsigned int wm8731_rates_11289600_16934400[] = {
305 8000, 44100, 88200,
306};
307
308static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
309 .list = wm8731_rates_12000000,
310 .count = ARRAY_SIZE(wm8731_rates_12000000),
311};
312
313static const
314struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
315 .list = wm8731_rates_12288000_18432000,
316 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
317};
318
319static const
320struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
321 .list = wm8731_rates_11289600_16934400,
322 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
323};
324
325static inline int get_coeff(int mclk, int rate)
326{
327 int i;
328
329 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
330 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
331 return i;
332 }
333 return 0;
334}
335
336static int wm8731_hw_params(struct snd_pcm_substream *substream,
337 struct snd_pcm_hw_params *params,
338 struct snd_soc_dai *dai)
339{
340 struct snd_soc_codec *codec = dai->codec;
341 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
342 u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
343 int i = get_coeff(wm8731->sysclk, params_rate(params));
344 u16 srate = (coeff_div[i].sr << 2) |
345 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
346
347 wm8731->playback_fs = params_rate(params);
348
349 snd_soc_write(codec, WM8731_SRATE, srate);
350
351
352 switch (params_width(params)) {
353 case 16:
354 break;
355 case 20:
356 iface |= 0x0004;
357 break;
358 case 24:
359 iface |= 0x0008;
360 break;
361 }
362
363 wm8731_set_deemph(codec);
364
365 snd_soc_write(codec, WM8731_IFACE, iface);
366 return 0;
367}
368
369static int wm8731_mute(struct snd_soc_dai *dai, int mute)
370{
371 struct snd_soc_codec *codec = dai->codec;
372 u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
373
374 if (mute)
375 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
376 else
377 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
378 return 0;
379}
380
381static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
382 int clk_id, unsigned int freq, int dir)
383{
384 struct snd_soc_codec *codec = codec_dai->codec;
385 struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
386 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
387
388 switch (clk_id) {
389 case WM8731_SYSCLK_XTAL:
390 case WM8731_SYSCLK_MCLK:
391 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
392 return -EINVAL;
393 wm8731->sysclk_type = clk_id;
394 break;
395 default:
396 return -EINVAL;
397 }
398
399 switch (freq) {
400 case 0:
401 wm8731->constraints = NULL;
402 break;
403 case 12000000:
404 wm8731->constraints = &wm8731_constraints_12000000;
405 break;
406 case 12288000:
407 case 18432000:
408 wm8731->constraints = &wm8731_constraints_12288000_18432000;
409 break;
410 case 16934400:
411 case 11289600:
412 wm8731->constraints = &wm8731_constraints_11289600_16934400;
413 break;
414 default:
415 return -EINVAL;
416 }
417
418 wm8731->sysclk = freq;
419
420 snd_soc_dapm_sync(dapm);
421
422 return 0;
423}
424
425
426static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
427 unsigned int fmt)
428{
429 struct snd_soc_codec *codec = codec_dai->codec;
430 u16 iface = 0;
431
432
433 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
434 case SND_SOC_DAIFMT_CBM_CFM:
435 iface |= 0x0040;
436 break;
437 case SND_SOC_DAIFMT_CBS_CFS:
438 break;
439 default:
440 return -EINVAL;
441 }
442
443
444 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
445 case SND_SOC_DAIFMT_I2S:
446 iface |= 0x0002;
447 break;
448 case SND_SOC_DAIFMT_RIGHT_J:
449 break;
450 case SND_SOC_DAIFMT_LEFT_J:
451 iface |= 0x0001;
452 break;
453 case SND_SOC_DAIFMT_DSP_A:
454 iface |= 0x0013;
455 break;
456 case SND_SOC_DAIFMT_DSP_B:
457 iface |= 0x0003;
458 break;
459 default:
460 return -EINVAL;
461 }
462
463
464 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
465 case SND_SOC_DAIFMT_NB_NF:
466 break;
467 case SND_SOC_DAIFMT_IB_IF:
468 iface |= 0x0090;
469 break;
470 case SND_SOC_DAIFMT_IB_NF:
471 iface |= 0x0080;
472 break;
473 case SND_SOC_DAIFMT_NB_IF:
474 iface |= 0x0010;
475 break;
476 default:
477 return -EINVAL;
478 }
479
480
481 snd_soc_write(codec, WM8731_IFACE, iface);
482 return 0;
483}
484
485static int wm8731_set_bias_level(struct snd_soc_codec *codec,
486 enum snd_soc_bias_level level)
487{
488 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
489 int ret;
490 u16 reg;
491
492 switch (level) {
493 case SND_SOC_BIAS_ON:
494 if (wm8731->mclk) {
495 ret = clk_prepare_enable(wm8731->mclk);
496 if (ret)
497 return ret;
498 }
499 break;
500 case SND_SOC_BIAS_PREPARE:
501 break;
502 case SND_SOC_BIAS_STANDBY:
503 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
504 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
505 wm8731->supplies);
506 if (ret != 0)
507 return ret;
508
509 regcache_sync(wm8731->regmap);
510 }
511
512
513 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
514 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
515 break;
516 case SND_SOC_BIAS_OFF:
517 if (wm8731->mclk)
518 clk_disable_unprepare(wm8731->mclk);
519 snd_soc_write(codec, WM8731_PWR, 0xffff);
520 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
521 wm8731->supplies);
522 regcache_mark_dirty(wm8731->regmap);
523 break;
524 }
525 return 0;
526}
527
528static int wm8731_startup(struct snd_pcm_substream *substream,
529 struct snd_soc_dai *dai)
530{
531 struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
532
533 if (wm8731->constraints)
534 snd_pcm_hw_constraint_list(substream->runtime, 0,
535 SNDRV_PCM_HW_PARAM_RATE,
536 wm8731->constraints);
537
538 return 0;
539}
540
541#define WM8731_RATES SNDRV_PCM_RATE_8000_96000
542
543#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
544 SNDRV_PCM_FMTBIT_S24_LE)
545
546static const struct snd_soc_dai_ops wm8731_dai_ops = {
547 .startup = wm8731_startup,
548 .hw_params = wm8731_hw_params,
549 .digital_mute = wm8731_mute,
550 .set_sysclk = wm8731_set_dai_sysclk,
551 .set_fmt = wm8731_set_dai_fmt,
552};
553
554static struct snd_soc_dai_driver wm8731_dai = {
555 .name = "wm8731-hifi",
556 .playback = {
557 .stream_name = "Playback",
558 .channels_min = 1,
559 .channels_max = 2,
560 .rates = WM8731_RATES,
561 .formats = WM8731_FORMATS,},
562 .capture = {
563 .stream_name = "Capture",
564 .channels_min = 1,
565 .channels_max = 2,
566 .rates = WM8731_RATES,
567 .formats = WM8731_FORMATS,},
568 .ops = &wm8731_dai_ops,
569 .symmetric_rates = 1,
570};
571
572static int wm8731_request_supplies(struct device *dev,
573 struct wm8731_priv *wm8731)
574{
575 int ret = 0, i;
576
577 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
578 wm8731->supplies[i].supply = wm8731_supply_names[i];
579
580 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
581 wm8731->supplies);
582 if (ret != 0) {
583 dev_err(dev, "Failed to request supplies: %d\n", ret);
584 return ret;
585 }
586
587 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
588 wm8731->supplies);
589 if (ret != 0) {
590 dev_err(dev, "Failed to enable supplies: %d\n", ret);
591 return ret;
592 }
593
594 return 0;
595}
596
597static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
598{
599 int ret = 0;
600
601 ret = wm8731_reset(wm8731->regmap);
602 if (ret < 0) {
603 dev_err(dev, "Failed to issue reset: %d\n", ret);
604 goto err_regulator_enable;
605 }
606
607
608 regmap_write(wm8731->regmap, WM8731_PWR, 0x7f);
609
610
611 regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0);
612 regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0);
613 regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0);
614 regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0);
615
616
617 regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0);
618
619 regcache_mark_dirty(wm8731->regmap);
620
621err_regulator_enable:
622
623 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
624
625 return ret;
626}
627
628static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
629 .set_bias_level = wm8731_set_bias_level,
630 .suspend_bias_off = true,
631
632 .dapm_widgets = wm8731_dapm_widgets,
633 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
634 .dapm_routes = wm8731_intercon,
635 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
636 .controls = wm8731_snd_controls,
637 .num_controls = ARRAY_SIZE(wm8731_snd_controls),
638};
639
640static const struct of_device_id wm8731_of_match[] = {
641 { .compatible = "wlf,wm8731", },
642 { }
643};
644
645MODULE_DEVICE_TABLE(of, wm8731_of_match);
646
647static const struct regmap_config wm8731_regmap = {
648 .reg_bits = 7,
649 .val_bits = 9,
650
651 .max_register = WM8731_RESET,
652 .volatile_reg = wm8731_volatile,
653
654 .cache_type = REGCACHE_RBTREE,
655 .reg_defaults = wm8731_reg_defaults,
656 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
657};
658
659#if defined(CONFIG_SPI_MASTER)
660static int wm8731_spi_probe(struct spi_device *spi)
661{
662 struct wm8731_priv *wm8731;
663 int ret;
664
665 wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
666 if (wm8731 == NULL)
667 return -ENOMEM;
668
669 wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
670 if (IS_ERR(wm8731->mclk)) {
671 ret = PTR_ERR(wm8731->mclk);
672 if (ret == -ENOENT) {
673 wm8731->mclk = NULL;
674 dev_warn(&spi->dev, "Assuming static MCLK\n");
675 } else {
676 dev_err(&spi->dev, "Failed to get MCLK: %d\n",
677 ret);
678 return ret;
679 }
680 }
681
682 mutex_init(&wm8731->lock);
683
684 spi_set_drvdata(spi, wm8731);
685
686 ret = wm8731_request_supplies(&spi->dev, wm8731);
687 if (ret != 0)
688 return ret;
689
690 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
691 if (IS_ERR(wm8731->regmap)) {
692 ret = PTR_ERR(wm8731->regmap);
693 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
694 ret);
695 return ret;
696 }
697
698 ret = wm8731_hw_init(&spi->dev, wm8731);
699 if (ret != 0)
700 return ret;
701
702 ret = snd_soc_register_codec(&spi->dev,
703 &soc_codec_dev_wm8731, &wm8731_dai, 1);
704 if (ret != 0) {
705 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
706 return ret;
707 }
708
709 return 0;
710}
711
712static int wm8731_spi_remove(struct spi_device *spi)
713{
714 snd_soc_unregister_codec(&spi->dev);
715 return 0;
716}
717
718static struct spi_driver wm8731_spi_driver = {
719 .driver = {
720 .name = "wm8731",
721 .of_match_table = wm8731_of_match,
722 },
723 .probe = wm8731_spi_probe,
724 .remove = wm8731_spi_remove,
725};
726#endif
727
728#if IS_ENABLED(CONFIG_I2C)
729static int wm8731_i2c_probe(struct i2c_client *i2c,
730 const struct i2c_device_id *id)
731{
732 struct wm8731_priv *wm8731;
733 int ret;
734
735 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
736 GFP_KERNEL);
737 if (wm8731 == NULL)
738 return -ENOMEM;
739
740 wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
741 if (IS_ERR(wm8731->mclk)) {
742 ret = PTR_ERR(wm8731->mclk);
743 if (ret == -ENOENT) {
744 wm8731->mclk = NULL;
745 dev_warn(&i2c->dev, "Assuming static MCLK\n");
746 } else {
747 dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
748 ret);
749 return ret;
750 }
751 }
752
753 mutex_init(&wm8731->lock);
754
755 i2c_set_clientdata(i2c, wm8731);
756
757 ret = wm8731_request_supplies(&i2c->dev, wm8731);
758 if (ret != 0)
759 return ret;
760
761 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
762 if (IS_ERR(wm8731->regmap)) {
763 ret = PTR_ERR(wm8731->regmap);
764 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
765 ret);
766 return ret;
767 }
768
769 ret = wm8731_hw_init(&i2c->dev, wm8731);
770 if (ret != 0)
771 return ret;
772
773 ret = snd_soc_register_codec(&i2c->dev,
774 &soc_codec_dev_wm8731, &wm8731_dai, 1);
775 if (ret != 0) {
776 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
777 return ret;
778 }
779
780 return 0;
781}
782
783static int wm8731_i2c_remove(struct i2c_client *client)
784{
785 snd_soc_unregister_codec(&client->dev);
786 return 0;
787}
788
789static const struct i2c_device_id wm8731_i2c_id[] = {
790 { "wm8731", 0 },
791 { }
792};
793MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
794
795static struct i2c_driver wm8731_i2c_driver = {
796 .driver = {
797 .name = "wm8731",
798 .of_match_table = wm8731_of_match,
799 },
800 .probe = wm8731_i2c_probe,
801 .remove = wm8731_i2c_remove,
802 .id_table = wm8731_i2c_id,
803};
804#endif
805
806static int __init wm8731_modinit(void)
807{
808 int ret = 0;
809#if IS_ENABLED(CONFIG_I2C)
810 ret = i2c_add_driver(&wm8731_i2c_driver);
811 if (ret != 0) {
812 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
813 ret);
814 }
815#endif
816#if defined(CONFIG_SPI_MASTER)
817 ret = spi_register_driver(&wm8731_spi_driver);
818 if (ret != 0) {
819 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
820 ret);
821 }
822#endif
823 return ret;
824}
825module_init(wm8731_modinit);
826
827static void __exit wm8731_exit(void)
828{
829#if IS_ENABLED(CONFIG_I2C)
830 i2c_del_driver(&wm8731_i2c_driver);
831#endif
832#if defined(CONFIG_SPI_MASTER)
833 spi_unregister_driver(&wm8731_spi_driver);
834#endif
835}
836module_exit(wm8731_exit);
837
838MODULE_DESCRIPTION("ASoC WM8731 driver");
839MODULE_AUTHOR("Richard Purdie");
840MODULE_LICENSE("GPL");
841
