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13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/pm.h>
18#include <linux/i2c.h>
19#include <linux/of_device.h>
20#include <linux/spi/spi.h>
21#include <linux/regmap.h>
22#include <linux/regulator/consumer.h>
23#include <linux/slab.h>
24#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/soc.h>
28#include <sound/initval.h>
29#include <sound/tlv.h>
30
31#include "wm8804.h"
32
33#define WM8804_NUM_SUPPLIES 2
34static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
35 "PVDD",
36 "DVDD"
37};
38
39static const struct reg_default wm8804_reg_defaults[] = {
40 { 3, 0x21 },
41 { 4, 0xFD },
42 { 5, 0x36 },
43 { 6, 0x07 },
44 { 7, 0x16 },
45 { 8, 0x18 },
46 { 9, 0xFF },
47 { 10, 0x00 },
48 { 18, 0x00 },
49 { 19, 0x00 },
50 { 20, 0x00 },
51 { 21, 0x71 },
52 { 22, 0x0B },
53 { 23, 0x70 },
54 { 24, 0x57 },
55 { 26, 0x42 },
56 { 27, 0x06 },
57 { 28, 0x06 },
58 { 29, 0x80 },
59 { 30, 0x07 },
60};
61
62struct wm8804_priv {
63 struct regmap *regmap;
64 struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
65 struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
66};
67
68static int txsrc_get(struct snd_kcontrol *kcontrol,
69 struct snd_ctl_elem_value *ucontrol);
70
71static int txsrc_put(struct snd_kcontrol *kcontrol,
72 struct snd_ctl_elem_value *ucontrol);
73
74
75
76
77
78
79#define WM8804_REGULATOR_EVENT(n) \
80static int wm8804_regulator_event_##n(struct notifier_block *nb, \
81 unsigned long event, void *data) \
82{ \
83 struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
84 disable_nb[n]); \
85 if (event & REGULATOR_EVENT_DISABLE) { \
86 regcache_mark_dirty(wm8804->regmap); \
87 } \
88 return 0; \
89}
90
91WM8804_REGULATOR_EVENT(0)
92WM8804_REGULATOR_EVENT(1)
93
94static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
95static const SOC_ENUM_SINGLE_EXT_DECL(txsrc, txsrc_text);
96
97static const struct snd_kcontrol_new wm8804_snd_controls[] = {
98 SOC_ENUM_EXT("Input Source", txsrc, txsrc_get, txsrc_put),
99 SOC_SINGLE("TX Playback Switch", WM8804_PWRDN, 2, 1, 1),
100 SOC_SINGLE("AIF Playback Switch", WM8804_PWRDN, 4, 1, 1)
101};
102
103static int txsrc_get(struct snd_kcontrol *kcontrol,
104 struct snd_ctl_elem_value *ucontrol)
105{
106 struct snd_soc_codec *codec;
107 unsigned int src;
108
109 codec = snd_kcontrol_chip(kcontrol);
110 src = snd_soc_read(codec, WM8804_SPDTX4);
111 if (src & 0x40)
112 ucontrol->value.integer.value[0] = 1;
113 else
114 ucontrol->value.integer.value[0] = 0;
115
116 return 0;
117}
118
119static int txsrc_put(struct snd_kcontrol *kcontrol,
120 struct snd_ctl_elem_value *ucontrol)
121{
122 struct snd_soc_codec *codec;
123 unsigned int src, txpwr;
124
125 codec = snd_kcontrol_chip(kcontrol);
126
127 if (ucontrol->value.integer.value[0] != 0
128 && ucontrol->value.integer.value[0] != 1)
129 return -EINVAL;
130
131 src = snd_soc_read(codec, WM8804_SPDTX4);
132 switch ((src & 0x40) >> 6) {
133 case 0:
134 if (!ucontrol->value.integer.value[0])
135 return 0;
136 break;
137 case 1:
138 if (ucontrol->value.integer.value[1])
139 return 0;
140 break;
141 }
142
143
144 txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
145
146 snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
147
148 snd_soc_update_bits(codec, WM8804_SPDTX4, 0x40,
149 ucontrol->value.integer.value[0] << 6);
150
151 if (ucontrol->value.integer.value[0]) {
152
153 snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0x2);
154
155 snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0);
156 } else {
157
158
159 snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0);
160 }
161
162
163 snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
164
165 return 0;
166}
167
168static bool wm8804_volatile(struct device *dev, unsigned int reg)
169{
170 switch (reg) {
171 case WM8804_RST_DEVID1:
172 case WM8804_DEVID2:
173 case WM8804_DEVREV:
174 case WM8804_INTSTAT:
175 case WM8804_SPDSTAT:
176 case WM8804_RXCHAN1:
177 case WM8804_RXCHAN2:
178 case WM8804_RXCHAN3:
179 case WM8804_RXCHAN4:
180 case WM8804_RXCHAN5:
181 return true;
182 default:
183 return false;
184 }
185}
186
187static int wm8804_reset(struct snd_soc_codec *codec)
188{
189 return snd_soc_write(codec, WM8804_RST_DEVID1, 0x0);
190}
191
192static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
193{
194 struct snd_soc_codec *codec;
195 u16 format, master, bcp, lrp;
196
197 codec = dai->codec;
198
199 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
200 case SND_SOC_DAIFMT_I2S:
201 format = 0x2;
202 break;
203 case SND_SOC_DAIFMT_RIGHT_J:
204 format = 0x0;
205 break;
206 case SND_SOC_DAIFMT_LEFT_J:
207 format = 0x1;
208 break;
209 case SND_SOC_DAIFMT_DSP_A:
210 case SND_SOC_DAIFMT_DSP_B:
211 format = 0x3;
212 break;
213 default:
214 dev_err(dai->dev, "Unknown dai format\n");
215 return -EINVAL;
216 }
217
218
219 snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
220 snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
221
222 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
223 case SND_SOC_DAIFMT_CBM_CFM:
224 master = 1;
225 break;
226 case SND_SOC_DAIFMT_CBS_CFS:
227 master = 0;
228 break;
229 default:
230 dev_err(dai->dev, "Unknown master/slave configuration\n");
231 return -EINVAL;
232 }
233
234
235 snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
236
237 bcp = lrp = 0;
238 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
239 case SND_SOC_DAIFMT_NB_NF:
240 break;
241 case SND_SOC_DAIFMT_IB_IF:
242 bcp = lrp = 1;
243 break;
244 case SND_SOC_DAIFMT_IB_NF:
245 bcp = 1;
246 break;
247 case SND_SOC_DAIFMT_NB_IF:
248 lrp = 1;
249 break;
250 default:
251 dev_err(dai->dev, "Unknown polarity configuration\n");
252 return -EINVAL;
253 }
254
255
256 snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
257 (bcp << 4) | (lrp << 5));
258 snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
259 (bcp << 4) | (lrp << 5));
260 return 0;
261}
262
263static int wm8804_hw_params(struct snd_pcm_substream *substream,
264 struct snd_pcm_hw_params *params,
265 struct snd_soc_dai *dai)
266{
267 struct snd_soc_codec *codec;
268 u16 blen;
269
270 codec = dai->codec;
271
272 switch (params_format(params)) {
273 case SNDRV_PCM_FORMAT_S16_LE:
274 blen = 0x0;
275 break;
276 case SNDRV_PCM_FORMAT_S20_3LE:
277 blen = 0x1;
278 break;
279 case SNDRV_PCM_FORMAT_S24_LE:
280 blen = 0x2;
281 break;
282 default:
283 dev_err(dai->dev, "Unsupported word length: %u\n",
284 params_format(params));
285 return -EINVAL;
286 }
287
288
289 snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
290 snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
291
292 return 0;
293}
294
295struct pll_div {
296 u32 prescale:1;
297 u32 mclkdiv:1;
298 u32 freqmode:2;
299 u32 n:4;
300 u32 k:22;
301};
302
303
304static struct {
305 unsigned int div;
306 unsigned int freqmode;
307 unsigned int mclkdiv;
308} post_table[] = {
309 { 2, 0, 0 },
310 { 4, 0, 1 },
311 { 4, 1, 0 },
312 { 8, 1, 1 },
313 { 8, 2, 0 },
314 { 16, 2, 1 },
315 { 12, 3, 0 },
316 { 24, 3, 1 }
317};
318
319#define FIXED_PLL_SIZE ((1ULL << 22) * 10)
320static int pll_factors(struct pll_div *pll_div, unsigned int target,
321 unsigned int source)
322{
323 u64 Kpart;
324 unsigned long int K, Ndiv, Nmod, tmp;
325 int i;
326
327
328
329
330
331 for (i = 0; i < ARRAY_SIZE(post_table); i++) {
332 tmp = target * post_table[i].div;
333 if (tmp >= 90000000 && tmp <= 100000000) {
334 pll_div->freqmode = post_table[i].freqmode;
335 pll_div->mclkdiv = post_table[i].mclkdiv;
336 target *= post_table[i].div;
337 break;
338 }
339 }
340
341 if (i == ARRAY_SIZE(post_table)) {
342 pr_err("%s: Unable to scale output frequency: %uHz\n",
343 __func__, target);
344 return -EINVAL;
345 }
346
347 pll_div->prescale = 0;
348 Ndiv = target / source;
349 if (Ndiv < 5) {
350 source >>= 1;
351 pll_div->prescale = 1;
352 Ndiv = target / source;
353 }
354
355 if (Ndiv < 5 || Ndiv > 13) {
356 pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
357 __func__, Ndiv);
358 return -EINVAL;
359 }
360 pll_div->n = Ndiv;
361
362 Nmod = target % source;
363 Kpart = FIXED_PLL_SIZE * (u64)Nmod;
364
365 do_div(Kpart, source);
366
367 K = Kpart & 0xffffffff;
368 if ((K % 10) >= 5)
369 K += 5;
370 K /= 10;
371 pll_div->k = K;
372
373 return 0;
374}
375
376static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
377 int source, unsigned int freq_in,
378 unsigned int freq_out)
379{
380 struct snd_soc_codec *codec;
381
382 codec = dai->codec;
383 if (!freq_in || !freq_out) {
384
385 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
386 return 0;
387 } else {
388 int ret;
389 struct pll_div pll_div;
390
391 ret = pll_factors(&pll_div, freq_out, freq_in);
392 if (ret)
393 return ret;
394
395
396 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
397
398
399 snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
400 pll_div.n | (pll_div.prescale << 4));
401
402 snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
403 pll_div.freqmode | (pll_div.mclkdiv << 3));
404
405 snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
406 snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
407 snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
408
409
410 snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
411 }
412
413 return 0;
414}
415
416static int wm8804_set_sysclk(struct snd_soc_dai *dai,
417 int clk_id, unsigned int freq, int dir)
418{
419 struct snd_soc_codec *codec;
420
421 codec = dai->codec;
422
423 switch (clk_id) {
424 case WM8804_TX_CLKSRC_MCLK:
425 if ((freq >= 10000000 && freq <= 14400000)
426 || (freq >= 16280000 && freq <= 27000000))
427 snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
428 else {
429 dev_err(dai->dev, "OSCCLOCK is not within the "
430 "recommended range: %uHz\n", freq);
431 return -EINVAL;
432 }
433 break;
434 case WM8804_TX_CLKSRC_PLL:
435 snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
436 break;
437 case WM8804_CLKOUT_SRC_CLK1:
438 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
439 break;
440 case WM8804_CLKOUT_SRC_OSCCLK:
441 snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
442 break;
443 default:
444 dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
445 return -EINVAL;
446 }
447
448 return 0;
449}
450
451static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
452 int div_id, int div)
453{
454 struct snd_soc_codec *codec;
455
456 codec = dai->codec;
457 switch (div_id) {
458 case WM8804_CLKOUT_DIV:
459 snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
460 (div & 0x3) << 4);
461 break;
462 default:
463 dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
464 return -EINVAL;
465 }
466 return 0;
467}
468
469static int wm8804_set_bias_level(struct snd_soc_codec *codec,
470 enum snd_soc_bias_level level)
471{
472 int ret;
473 struct wm8804_priv *wm8804;
474
475 wm8804 = snd_soc_codec_get_drvdata(codec);
476 switch (level) {
477 case SND_SOC_BIAS_ON:
478 break;
479 case SND_SOC_BIAS_PREPARE:
480
481 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
482 break;
483 case SND_SOC_BIAS_STANDBY:
484 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
485 ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
486 wm8804->supplies);
487 if (ret) {
488 dev_err(codec->dev,
489 "Failed to enable supplies: %d\n",
490 ret);
491 return ret;
492 }
493 regcache_sync(wm8804->regmap);
494 }
495
496 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
497 break;
498 case SND_SOC_BIAS_OFF:
499
500 snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
501 regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
502 wm8804->supplies);
503 break;
504 }
505
506 codec->dapm.bias_level = level;
507 return 0;
508}
509
510#ifdef CONFIG_PM
511static int wm8804_suspend(struct snd_soc_codec *codec)
512{
513 wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
514 return 0;
515}
516
517static int wm8804_resume(struct snd_soc_codec *codec)
518{
519 wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
520 return 0;
521}
522#else
523#define wm8804_suspend NULL
524#define wm8804_resume NULL
525#endif
526
527static int wm8804_remove(struct snd_soc_codec *codec)
528{
529 struct wm8804_priv *wm8804;
530 int i;
531
532 wm8804 = snd_soc_codec_get_drvdata(codec);
533 wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
534
535 for (i = 0; i < ARRAY_SIZE(wm8804->supplies); ++i)
536 regulator_unregister_notifier(wm8804->supplies[i].consumer,
537 &wm8804->disable_nb[i]);
538 regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
539 return 0;
540}
541
542static int wm8804_probe(struct snd_soc_codec *codec)
543{
544 struct wm8804_priv *wm8804;
545 int i, id1, id2, ret;
546
547 wm8804 = snd_soc_codec_get_drvdata(codec);
548
549 codec->control_data = wm8804->regmap;
550
551 ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
552 if (ret < 0) {
553 dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret);
554 return ret;
555 }
556
557 for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
558 wm8804->supplies[i].supply = wm8804_supply_names[i];
559
560 ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8804->supplies),
561 wm8804->supplies);
562 if (ret) {
563 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
564 return ret;
565 }
566
567 wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
568 wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
569
570
571 for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
572 ret = regulator_register_notifier(wm8804->supplies[i].consumer,
573 &wm8804->disable_nb[i]);
574 if (ret != 0) {
575 dev_err(codec->dev,
576 "Failed to register regulator notifier: %d\n",
577 ret);
578 }
579 }
580
581 ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
582 wm8804->supplies);
583 if (ret) {
584 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
585 goto err_reg_get;
586 }
587
588 id1 = snd_soc_read(codec, WM8804_RST_DEVID1);
589 if (id1 < 0) {
590 dev_err(codec->dev, "Failed to read device ID: %d\n", id1);
591 ret = id1;
592 goto err_reg_enable;
593 }
594
595 id2 = snd_soc_read(codec, WM8804_DEVID2);
596 if (id2 < 0) {
597 dev_err(codec->dev, "Failed to read device ID: %d\n", id2);
598 ret = id2;
599 goto err_reg_enable;
600 }
601
602 id2 = (id2 << 8) | id1;
603
604 if (id2 != 0x8805) {
605 dev_err(codec->dev, "Invalid device ID: %#x\n", id2);
606 ret = -EINVAL;
607 goto err_reg_enable;
608 }
609
610 ret = snd_soc_read(codec, WM8804_DEVREV);
611 if (ret < 0) {
612 dev_err(codec->dev, "Failed to read device revision: %d\n",
613 ret);
614 goto err_reg_enable;
615 }
616 dev_info(codec->dev, "revision %c\n", ret + 'A');
617
618 ret = wm8804_reset(codec);
619 if (ret < 0) {
620 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
621 goto err_reg_enable;
622 }
623
624 wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
625
626 return 0;
627
628err_reg_enable:
629 regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
630err_reg_get:
631 regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
632 return ret;
633}
634
635static const struct snd_soc_dai_ops wm8804_dai_ops = {
636 .hw_params = wm8804_hw_params,
637 .set_fmt = wm8804_set_fmt,
638 .set_sysclk = wm8804_set_sysclk,
639 .set_clkdiv = wm8804_set_clkdiv,
640 .set_pll = wm8804_set_pll
641};
642
643#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
644 SNDRV_PCM_FMTBIT_S24_LE)
645
646#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
647 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
648 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
649 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
650
651static struct snd_soc_dai_driver wm8804_dai = {
652 .name = "wm8804-spdif",
653 .playback = {
654 .stream_name = "Playback",
655 .channels_min = 2,
656 .channels_max = 2,
657 .rates = WM8804_RATES,
658 .formats = WM8804_FORMATS,
659 },
660 .capture = {
661 .stream_name = "Capture",
662 .channels_min = 2,
663 .channels_max = 2,
664 .rates = WM8804_RATES,
665 .formats = WM8804_FORMATS,
666 },
667 .ops = &wm8804_dai_ops,
668 .symmetric_rates = 1
669};
670
671static struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
672 .probe = wm8804_probe,
673 .remove = wm8804_remove,
674 .suspend = wm8804_suspend,
675 .resume = wm8804_resume,
676 .set_bias_level = wm8804_set_bias_level,
677 .idle_bias_off = true,
678
679 .controls = wm8804_snd_controls,
680 .num_controls = ARRAY_SIZE(wm8804_snd_controls),
681};
682
683static const struct of_device_id wm8804_of_match[] = {
684 { .compatible = "wlf,wm8804", },
685 { }
686};
687MODULE_DEVICE_TABLE(of, wm8804_of_match);
688
689static struct regmap_config wm8804_regmap_config = {
690 .reg_bits = 8,
691 .val_bits = 8,
692
693 .max_register = WM8804_MAX_REGISTER,
694 .volatile_reg = wm8804_volatile,
695
696 .cache_type = REGCACHE_RBTREE,
697 .reg_defaults = wm8804_reg_defaults,
698 .num_reg_defaults = ARRAY_SIZE(wm8804_reg_defaults),
699};
700
701#if defined(CONFIG_SPI_MASTER)
702static int wm8804_spi_probe(struct spi_device *spi)
703{
704 struct wm8804_priv *wm8804;
705 int ret;
706
707 wm8804 = devm_kzalloc(&spi->dev, sizeof *wm8804, GFP_KERNEL);
708 if (!wm8804)
709 return -ENOMEM;
710
711 wm8804->regmap = devm_regmap_init_spi(spi, &wm8804_regmap_config);
712 if (IS_ERR(wm8804->regmap)) {
713 ret = PTR_ERR(wm8804->regmap);
714 return ret;
715 }
716
717 spi_set_drvdata(spi, wm8804);
718
719 ret = snd_soc_register_codec(&spi->dev,
720 &soc_codec_dev_wm8804, &wm8804_dai, 1);
721
722 return ret;
723}
724
725static int wm8804_spi_remove(struct spi_device *spi)
726{
727 snd_soc_unregister_codec(&spi->dev);
728 return 0;
729}
730
731static struct spi_driver wm8804_spi_driver = {
732 .driver = {
733 .name = "wm8804",
734 .owner = THIS_MODULE,
735 .of_match_table = wm8804_of_match,
736 },
737 .probe = wm8804_spi_probe,
738 .remove = wm8804_spi_remove
739};
740#endif
741
742#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
743static int wm8804_i2c_probe(struct i2c_client *i2c,
744 const struct i2c_device_id *id)
745{
746 struct wm8804_priv *wm8804;
747 int ret;
748
749 wm8804 = devm_kzalloc(&i2c->dev, sizeof *wm8804, GFP_KERNEL);
750 if (!wm8804)
751 return -ENOMEM;
752
753 wm8804->regmap = devm_regmap_init_i2c(i2c, &wm8804_regmap_config);
754 if (IS_ERR(wm8804->regmap)) {
755 ret = PTR_ERR(wm8804->regmap);
756 return ret;
757 }
758
759 i2c_set_clientdata(i2c, wm8804);
760
761 ret = snd_soc_register_codec(&i2c->dev,
762 &soc_codec_dev_wm8804, &wm8804_dai, 1);
763 return ret;
764}
765
766static int wm8804_i2c_remove(struct i2c_client *i2c)
767{
768 snd_soc_unregister_codec(&i2c->dev);
769 return 0;
770}
771
772static const struct i2c_device_id wm8804_i2c_id[] = {
773 { "wm8804", 0 },
774 { }
775};
776MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id);
777
778static struct i2c_driver wm8804_i2c_driver = {
779 .driver = {
780 .name = "wm8804",
781 .owner = THIS_MODULE,
782 .of_match_table = wm8804_of_match,
783 },
784 .probe = wm8804_i2c_probe,
785 .remove = wm8804_i2c_remove,
786 .id_table = wm8804_i2c_id
787};
788#endif
789
790static int __init wm8804_modinit(void)
791{
792 int ret = 0;
793
794#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
795 ret = i2c_add_driver(&wm8804_i2c_driver);
796 if (ret) {
797 printk(KERN_ERR "Failed to register wm8804 I2C driver: %d\n",
798 ret);
799 }
800#endif
801#if defined(CONFIG_SPI_MASTER)
802 ret = spi_register_driver(&wm8804_spi_driver);
803 if (ret != 0) {
804 printk(KERN_ERR "Failed to register wm8804 SPI driver: %d\n",
805 ret);
806 }
807#endif
808 return ret;
809}
810module_init(wm8804_modinit);
811
812static void __exit wm8804_exit(void)
813{
814#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
815 i2c_del_driver(&wm8804_i2c_driver);
816#endif
817#if defined(CONFIG_SPI_MASTER)
818 spi_unregister_driver(&wm8804_spi_driver);
819#endif
820}
821module_exit(wm8804_exit);
822
823MODULE_DESCRIPTION("ASoC WM8804 driver");
824MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
825MODULE_LICENSE("GPL");
826
