1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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_component *component)
92{
93 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
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(component->dev, "Set deemphasis %d (%dHz)\n",
114 best, wm8731_deemph[best]);
115
116 return snd_soc_component_update_bits(component, 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_component *component = snd_soc_kcontrol_component(kcontrol);
123 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
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_component *component = snd_soc_kcontrol_component(kcontrol);
134 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
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(component);
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_component *component = snd_soc_dapm_to_component(source->dapm);
218 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
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_component *component = dai->component;
341 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
342 u16 iface = snd_soc_component_read32(component, 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_component_write(component, 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 case 32:
362 iface |= 0x000c;
363 break;
364 }
365
366 wm8731_set_deemph(component);
367
368 snd_soc_component_write(component, WM8731_IFACE, iface);
369 return 0;
370}
371
372static int wm8731_mute(struct snd_soc_dai *dai, int mute)
373{
374 struct snd_soc_component *component = dai->component;
375 u16 mute_reg = snd_soc_component_read32(component, WM8731_APDIGI) & 0xfff7;
376
377 if (mute)
378 snd_soc_component_write(component, WM8731_APDIGI, mute_reg | 0x8);
379 else
380 snd_soc_component_write(component, WM8731_APDIGI, mute_reg);
381 return 0;
382}
383
384static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
385 int clk_id, unsigned int freq, int dir)
386{
387 struct snd_soc_component *component = codec_dai->component;
388 struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
389 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
390
391 switch (clk_id) {
392 case WM8731_SYSCLK_XTAL:
393 case WM8731_SYSCLK_MCLK:
394 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
395 return -EINVAL;
396 wm8731->sysclk_type = clk_id;
397 break;
398 default:
399 return -EINVAL;
400 }
401
402 switch (freq) {
403 case 0:
404 wm8731->constraints = NULL;
405 break;
406 case 12000000:
407 wm8731->constraints = &wm8731_constraints_12000000;
408 break;
409 case 12288000:
410 case 18432000:
411 wm8731->constraints = &wm8731_constraints_12288000_18432000;
412 break;
413 case 16934400:
414 case 11289600:
415 wm8731->constraints = &wm8731_constraints_11289600_16934400;
416 break;
417 default:
418 return -EINVAL;
419 }
420
421 wm8731->sysclk = freq;
422
423 snd_soc_dapm_sync(dapm);
424
425 return 0;
426}
427
428
429static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
430 unsigned int fmt)
431{
432 struct snd_soc_component *component = codec_dai->component;
433 u16 iface = 0;
434
435
436 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
437 case SND_SOC_DAIFMT_CBM_CFM:
438 iface |= 0x0040;
439 break;
440 case SND_SOC_DAIFMT_CBS_CFS:
441 break;
442 default:
443 return -EINVAL;
444 }
445
446
447 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
448 case SND_SOC_DAIFMT_I2S:
449 iface |= 0x0002;
450 break;
451 case SND_SOC_DAIFMT_RIGHT_J:
452 break;
453 case SND_SOC_DAIFMT_LEFT_J:
454 iface |= 0x0001;
455 break;
456 case SND_SOC_DAIFMT_DSP_A:
457 iface |= 0x0013;
458 break;
459 case SND_SOC_DAIFMT_DSP_B:
460 iface |= 0x0003;
461 break;
462 default:
463 return -EINVAL;
464 }
465
466
467 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
468 case SND_SOC_DAIFMT_NB_NF:
469 break;
470 case SND_SOC_DAIFMT_IB_IF:
471 iface |= 0x0090;
472 break;
473 case SND_SOC_DAIFMT_IB_NF:
474 iface |= 0x0080;
475 break;
476 case SND_SOC_DAIFMT_NB_IF:
477 iface |= 0x0010;
478 break;
479 default:
480 return -EINVAL;
481 }
482
483
484 snd_soc_component_write(component, WM8731_IFACE, iface);
485 return 0;
486}
487
488static int wm8731_set_bias_level(struct snd_soc_component *component,
489 enum snd_soc_bias_level level)
490{
491 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
492 int ret;
493 u16 reg;
494
495 switch (level) {
496 case SND_SOC_BIAS_ON:
497 if (wm8731->mclk) {
498 ret = clk_prepare_enable(wm8731->mclk);
499 if (ret)
500 return ret;
501 }
502 break;
503 case SND_SOC_BIAS_PREPARE:
504 break;
505 case SND_SOC_BIAS_STANDBY:
506 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
507 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
508 wm8731->supplies);
509 if (ret != 0)
510 return ret;
511
512 regcache_sync(wm8731->regmap);
513 }
514
515
516 reg = snd_soc_component_read32(component, WM8731_PWR) & 0xff7f;
517 snd_soc_component_write(component, WM8731_PWR, reg | 0x0040);
518 break;
519 case SND_SOC_BIAS_OFF:
520 if (wm8731->mclk)
521 clk_disable_unprepare(wm8731->mclk);
522 snd_soc_component_write(component, WM8731_PWR, 0xffff);
523 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
524 wm8731->supplies);
525 regcache_mark_dirty(wm8731->regmap);
526 break;
527 }
528 return 0;
529}
530
531static int wm8731_startup(struct snd_pcm_substream *substream,
532 struct snd_soc_dai *dai)
533{
534 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(dai->component);
535
536 if (wm8731->constraints)
537 snd_pcm_hw_constraint_list(substream->runtime, 0,
538 SNDRV_PCM_HW_PARAM_RATE,
539 wm8731->constraints);
540
541 return 0;
542}
543
544#define WM8731_RATES SNDRV_PCM_RATE_8000_96000
545
546#define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
547 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
548
549static const struct snd_soc_dai_ops wm8731_dai_ops = {
550 .startup = wm8731_startup,
551 .hw_params = wm8731_hw_params,
552 .digital_mute = wm8731_mute,
553 .set_sysclk = wm8731_set_dai_sysclk,
554 .set_fmt = wm8731_set_dai_fmt,
555};
556
557static struct snd_soc_dai_driver wm8731_dai = {
558 .name = "wm8731-hifi",
559 .playback = {
560 .stream_name = "Playback",
561 .channels_min = 1,
562 .channels_max = 2,
563 .rates = WM8731_RATES,
564 .formats = WM8731_FORMATS,},
565 .capture = {
566 .stream_name = "Capture",
567 .channels_min = 1,
568 .channels_max = 2,
569 .rates = WM8731_RATES,
570 .formats = WM8731_FORMATS,},
571 .ops = &wm8731_dai_ops,
572 .symmetric_rates = 1,
573};
574
575static int wm8731_request_supplies(struct device *dev,
576 struct wm8731_priv *wm8731)
577{
578 int ret = 0, i;
579
580 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
581 wm8731->supplies[i].supply = wm8731_supply_names[i];
582
583 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
584 wm8731->supplies);
585 if (ret != 0) {
586 dev_err(dev, "Failed to request supplies: %d\n", ret);
587 return ret;
588 }
589
590 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
591 wm8731->supplies);
592 if (ret != 0) {
593 dev_err(dev, "Failed to enable supplies: %d\n", ret);
594 return ret;
595 }
596
597 return 0;
598}
599
600static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
601{
602 int ret = 0;
603
604 ret = wm8731_reset(wm8731->regmap);
605 if (ret < 0) {
606 dev_err(dev, "Failed to issue reset: %d\n", ret);
607 goto err_regulator_enable;
608 }
609
610
611 regmap_write(wm8731->regmap, WM8731_PWR, 0x7f);
612
613
614 regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0);
615 regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0);
616 regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0);
617 regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0);
618
619
620 regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0);
621
622 regcache_mark_dirty(wm8731->regmap);
623
624err_regulator_enable:
625
626 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
627
628 return ret;
629}
630
631static const struct snd_soc_component_driver soc_component_dev_wm8731 = {
632 .set_bias_level = wm8731_set_bias_level,
633 .controls = wm8731_snd_controls,
634 .num_controls = ARRAY_SIZE(wm8731_snd_controls),
635 .dapm_widgets = wm8731_dapm_widgets,
636 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
637 .dapm_routes = wm8731_intercon,
638 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
639 .suspend_bias_off = 1,
640 .idle_bias_on = 1,
641 .use_pmdown_time = 1,
642 .endianness = 1,
643 .non_legacy_dai_naming = 1,
644};
645
646static const struct of_device_id wm8731_of_match[] = {
647 { .compatible = "wlf,wm8731", },
648 { }
649};
650
651MODULE_DEVICE_TABLE(of, wm8731_of_match);
652
653static const struct regmap_config wm8731_regmap = {
654 .reg_bits = 7,
655 .val_bits = 9,
656
657 .max_register = WM8731_RESET,
658 .volatile_reg = wm8731_volatile,
659
660 .cache_type = REGCACHE_RBTREE,
661 .reg_defaults = wm8731_reg_defaults,
662 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
663};
664
665#if defined(CONFIG_SPI_MASTER)
666static int wm8731_spi_probe(struct spi_device *spi)
667{
668 struct wm8731_priv *wm8731;
669 int ret;
670
671 wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
672 if (wm8731 == NULL)
673 return -ENOMEM;
674
675 wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
676 if (IS_ERR(wm8731->mclk)) {
677 ret = PTR_ERR(wm8731->mclk);
678 if (ret == -ENOENT) {
679 wm8731->mclk = NULL;
680 dev_warn(&spi->dev, "Assuming static MCLK\n");
681 } else {
682 dev_err(&spi->dev, "Failed to get MCLK: %d\n",
683 ret);
684 return ret;
685 }
686 }
687
688 mutex_init(&wm8731->lock);
689
690 spi_set_drvdata(spi, wm8731);
691
692 ret = wm8731_request_supplies(&spi->dev, wm8731);
693 if (ret != 0)
694 return ret;
695
696 wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
697 if (IS_ERR(wm8731->regmap)) {
698 ret = PTR_ERR(wm8731->regmap);
699 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
700 ret);
701 return ret;
702 }
703
704 ret = wm8731_hw_init(&spi->dev, wm8731);
705 if (ret != 0)
706 return ret;
707
708 ret = devm_snd_soc_register_component(&spi->dev,
709 &soc_component_dev_wm8731, &wm8731_dai, 1);
710 if (ret != 0) {
711 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
712 return ret;
713 }
714
715 return 0;
716}
717
718static int wm8731_spi_remove(struct spi_device *spi)
719{
720 return 0;
721}
722
723static struct spi_driver wm8731_spi_driver = {
724 .driver = {
725 .name = "wm8731",
726 .of_match_table = wm8731_of_match,
727 },
728 .probe = wm8731_spi_probe,
729 .remove = wm8731_spi_remove,
730};
731#endif
732
733#if IS_ENABLED(CONFIG_I2C)
734static int wm8731_i2c_probe(struct i2c_client *i2c,
735 const struct i2c_device_id *id)
736{
737 struct wm8731_priv *wm8731;
738 int ret;
739
740 wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
741 GFP_KERNEL);
742 if (wm8731 == NULL)
743 return -ENOMEM;
744
745 wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
746 if (IS_ERR(wm8731->mclk)) {
747 ret = PTR_ERR(wm8731->mclk);
748 if (ret == -ENOENT) {
749 wm8731->mclk = NULL;
750 dev_warn(&i2c->dev, "Assuming static MCLK\n");
751 } else {
752 dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
753 ret);
754 return ret;
755 }
756 }
757
758 mutex_init(&wm8731->lock);
759
760 i2c_set_clientdata(i2c, wm8731);
761
762 ret = wm8731_request_supplies(&i2c->dev, wm8731);
763 if (ret != 0)
764 return ret;
765
766 wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
767 if (IS_ERR(wm8731->regmap)) {
768 ret = PTR_ERR(wm8731->regmap);
769 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
770 ret);
771 return ret;
772 }
773
774 ret = wm8731_hw_init(&i2c->dev, wm8731);
775 if (ret != 0)
776 return ret;
777
778 ret = devm_snd_soc_register_component(&i2c->dev,
779 &soc_component_dev_wm8731, &wm8731_dai, 1);
780 if (ret != 0) {
781 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
782 return ret;
783 }
784
785 return 0;
786}
787
788static int wm8731_i2c_remove(struct i2c_client *client)
789{
790 return 0;
791}
792
793static const struct i2c_device_id wm8731_i2c_id[] = {
794 { "wm8731", 0 },
795 { }
796};
797MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
798
799static struct i2c_driver wm8731_i2c_driver = {
800 .driver = {
801 .name = "wm8731",
802 .of_match_table = wm8731_of_match,
803 },
804 .probe = wm8731_i2c_probe,
805 .remove = wm8731_i2c_remove,
806 .id_table = wm8731_i2c_id,
807};
808#endif
809
810static int __init wm8731_modinit(void)
811{
812 int ret = 0;
813#if IS_ENABLED(CONFIG_I2C)
814 ret = i2c_add_driver(&wm8731_i2c_driver);
815 if (ret != 0) {
816 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
817 ret);
818 }
819#endif
820#if defined(CONFIG_SPI_MASTER)
821 ret = spi_register_driver(&wm8731_spi_driver);
822 if (ret != 0) {
823 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
824 ret);
825 }
826#endif
827 return ret;
828}
829module_init(wm8731_modinit);
830
831static void __exit wm8731_exit(void)
832{
833#if IS_ENABLED(CONFIG_I2C)
834 i2c_del_driver(&wm8731_i2c_driver);
835#endif
836#if defined(CONFIG_SPI_MASTER)
837 spi_unregister_driver(&wm8731_spi_driver);
838#endif
839}
840module_exit(wm8731_exit);
841
842MODULE_DESCRIPTION("ASoC WM8731 driver");
843MODULE_AUTHOR("Richard Purdie");
844MODULE_LICENSE("GPL");
845
