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15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/init.h>
18#include <linux/delay.h>
19#include <linux/pm.h>
20#include <linux/i2c.h>
21#include <linux/regmap.h>
22#include <linux/spi/spi.h>
23#include <linux/slab.h>
24#include <linux/of_device.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/pcm_params.h>
28#include <sound/soc.h>
29#include <sound/tlv.h>
30#include <sound/initval.h>
31
32#include "wm8711.h"
33
34
35struct wm8711_priv {
36 struct regmap *regmap;
37 unsigned int sysclk;
38};
39
40
41
42
43
44
45
46static const struct reg_default wm8711_reg_defaults[] = {
47 { 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
48 { 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
49};
50
51static bool wm8711_volatile(struct device *dev, unsigned int reg)
52{
53 switch (reg) {
54 case WM8711_RESET:
55 return true;
56 default:
57 return false;
58 }
59}
60
61#define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0)
62
63static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
64
65static const struct snd_kcontrol_new wm8711_snd_controls[] = {
66
67SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
68 0, 127, 0, out_tlv),
69SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
70 7, 1, 0),
71
72};
73
74
75static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
76SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
77SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
78};
79
80static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
81SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
82 &wm8711_output_mixer_controls[0],
83 ARRAY_SIZE(wm8711_output_mixer_controls)),
84SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
85SND_SOC_DAPM_OUTPUT("LOUT"),
86SND_SOC_DAPM_OUTPUT("LHPOUT"),
87SND_SOC_DAPM_OUTPUT("ROUT"),
88SND_SOC_DAPM_OUTPUT("RHPOUT"),
89};
90
91static const struct snd_soc_dapm_route wm8711_intercon[] = {
92
93 {"Output Mixer", "Line Bypass Switch", "Line Input"},
94 {"Output Mixer", "HiFi Playback Switch", "DAC"},
95
96
97 {"RHPOUT", NULL, "Output Mixer"},
98 {"ROUT", NULL, "Output Mixer"},
99 {"LHPOUT", NULL, "Output Mixer"},
100 {"LOUT", NULL, "Output Mixer"},
101};
102
103struct _coeff_div {
104 u32 mclk;
105 u32 rate;
106 u16 fs;
107 u8 sr:4;
108 u8 bosr:1;
109 u8 usb:1;
110};
111
112
113static const struct _coeff_div coeff_div[] = {
114
115 {12288000, 48000, 256, 0x0, 0x0, 0x0},
116 {18432000, 48000, 384, 0x0, 0x1, 0x0},
117 {12000000, 48000, 250, 0x0, 0x0, 0x1},
118
119
120 {12288000, 32000, 384, 0x6, 0x0, 0x0},
121 {18432000, 32000, 576, 0x6, 0x1, 0x0},
122 {12000000, 32000, 375, 0x6, 0x0, 0x1},
123
124
125 {12288000, 8000, 1536, 0x3, 0x0, 0x0},
126 {18432000, 8000, 2304, 0x3, 0x1, 0x0},
127 {11289600, 8000, 1408, 0xb, 0x0, 0x0},
128 {16934400, 8000, 2112, 0xb, 0x1, 0x0},
129 {12000000, 8000, 1500, 0x3, 0x0, 0x1},
130
131
132 {12288000, 96000, 128, 0x7, 0x0, 0x0},
133 {18432000, 96000, 192, 0x7, 0x1, 0x0},
134 {12000000, 96000, 125, 0x7, 0x0, 0x1},
135
136
137 {11289600, 44100, 256, 0x8, 0x0, 0x0},
138 {16934400, 44100, 384, 0x8, 0x1, 0x0},
139 {12000000, 44100, 272, 0x8, 0x1, 0x1},
140
141
142 {11289600, 88200, 128, 0xf, 0x0, 0x0},
143 {16934400, 88200, 192, 0xf, 0x1, 0x0},
144 {12000000, 88200, 136, 0xf, 0x1, 0x1},
145};
146
147static inline int get_coeff(int mclk, int rate)
148{
149 int i;
150
151 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
152 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
153 return i;
154 }
155 return 0;
156}
157
158static int wm8711_hw_params(struct snd_pcm_substream *substream,
159 struct snd_pcm_hw_params *params,
160 struct snd_soc_dai *dai)
161{
162 struct snd_soc_codec *codec = dai->codec;
163 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
164 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfff3;
165 int i = get_coeff(wm8711->sysclk, params_rate(params));
166 u16 srate = (coeff_div[i].sr << 2) |
167 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
168
169 snd_soc_write(codec, WM8711_SRATE, srate);
170
171
172 switch (params_format(params)) {
173 case SNDRV_PCM_FORMAT_S16_LE:
174 break;
175 case SNDRV_PCM_FORMAT_S20_3LE:
176 iface |= 0x0004;
177 break;
178 case SNDRV_PCM_FORMAT_S24_LE:
179 iface |= 0x0008;
180 break;
181 }
182
183 snd_soc_write(codec, WM8711_IFACE, iface);
184 return 0;
185}
186
187static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
188 struct snd_soc_dai *dai)
189{
190 struct snd_soc_codec *codec = dai->codec;
191
192
193 snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
194
195 return 0;
196}
197
198static void wm8711_shutdown(struct snd_pcm_substream *substream,
199 struct snd_soc_dai *dai)
200{
201 struct snd_soc_codec *codec = dai->codec;
202
203
204 if (!codec->active) {
205 udelay(50);
206 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
207 }
208}
209
210static int wm8711_mute(struct snd_soc_dai *dai, int mute)
211{
212 struct snd_soc_codec *codec = dai->codec;
213 u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
214
215 if (mute)
216 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
217 else
218 snd_soc_write(codec, WM8711_APDIGI, mute_reg);
219
220 return 0;
221}
222
223static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
224 int clk_id, unsigned int freq, int dir)
225{
226 struct snd_soc_codec *codec = codec_dai->codec;
227 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
228
229 switch (freq) {
230 case 11289600:
231 case 12000000:
232 case 12288000:
233 case 16934400:
234 case 18432000:
235 wm8711->sysclk = freq;
236 return 0;
237 }
238 return -EINVAL;
239}
240
241static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
242 unsigned int fmt)
243{
244 struct snd_soc_codec *codec = codec_dai->codec;
245 u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0x000c;
246
247
248 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
249 case SND_SOC_DAIFMT_CBM_CFM:
250 iface |= 0x0040;
251 break;
252 case SND_SOC_DAIFMT_CBS_CFS:
253 break;
254 default:
255 return -EINVAL;
256 }
257
258
259 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
260 case SND_SOC_DAIFMT_I2S:
261 iface |= 0x0002;
262 break;
263 case SND_SOC_DAIFMT_RIGHT_J:
264 break;
265 case SND_SOC_DAIFMT_LEFT_J:
266 iface |= 0x0001;
267 break;
268 case SND_SOC_DAIFMT_DSP_A:
269 iface |= 0x0003;
270 break;
271 case SND_SOC_DAIFMT_DSP_B:
272 iface |= 0x0013;
273 break;
274 default:
275 return -EINVAL;
276 }
277
278
279 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
280 case SND_SOC_DAIFMT_NB_NF:
281 break;
282 case SND_SOC_DAIFMT_IB_IF:
283 iface |= 0x0090;
284 break;
285 case SND_SOC_DAIFMT_IB_NF:
286 iface |= 0x0080;
287 break;
288 case SND_SOC_DAIFMT_NB_IF:
289 iface |= 0x0010;
290 break;
291 default:
292 return -EINVAL;
293 }
294
295
296 snd_soc_write(codec, WM8711_IFACE, iface);
297 return 0;
298}
299
300static int wm8711_set_bias_level(struct snd_soc_codec *codec,
301 enum snd_soc_bias_level level)
302{
303 struct wm8711_priv *wm8711 = snd_soc_codec_get_drvdata(codec);
304 u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
305
306 switch (level) {
307 case SND_SOC_BIAS_ON:
308 snd_soc_write(codec, WM8711_PWR, reg);
309 break;
310 case SND_SOC_BIAS_PREPARE:
311 break;
312 case SND_SOC_BIAS_STANDBY:
313 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
314 regcache_sync(wm8711->regmap);
315
316 snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
317 break;
318 case SND_SOC_BIAS_OFF:
319 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
320 snd_soc_write(codec, WM8711_PWR, 0xffff);
321 break;
322 }
323 codec->dapm.bias_level = level;
324 return 0;
325}
326
327#define WM8711_RATES SNDRV_PCM_RATE_8000_96000
328
329#define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
330 SNDRV_PCM_FMTBIT_S24_LE)
331
332static const struct snd_soc_dai_ops wm8711_ops = {
333 .prepare = wm8711_pcm_prepare,
334 .hw_params = wm8711_hw_params,
335 .shutdown = wm8711_shutdown,
336 .digital_mute = wm8711_mute,
337 .set_sysclk = wm8711_set_dai_sysclk,
338 .set_fmt = wm8711_set_dai_fmt,
339};
340
341static struct snd_soc_dai_driver wm8711_dai = {
342 .name = "wm8711-hifi",
343 .playback = {
344 .stream_name = "Playback",
345 .channels_min = 1,
346 .channels_max = 2,
347 .rates = WM8711_RATES,
348 .formats = WM8711_FORMATS,
349 },
350 .ops = &wm8711_ops,
351};
352
353static int wm8711_suspend(struct snd_soc_codec *codec)
354{
355 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
356 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
357 return 0;
358}
359
360static int wm8711_resume(struct snd_soc_codec *codec)
361{
362 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
363 return 0;
364}
365
366static int wm8711_probe(struct snd_soc_codec *codec)
367{
368 int ret;
369
370 ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
371 if (ret < 0) {
372 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
373 return ret;
374 }
375
376 ret = wm8711_reset(codec);
377 if (ret < 0) {
378 dev_err(codec->dev, "Failed to issue reset\n");
379 return ret;
380 }
381
382 wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
383
384
385 snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100);
386 snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100);
387
388 return ret;
389
390}
391
392
393static int wm8711_remove(struct snd_soc_codec *codec)
394{
395 wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
396 return 0;
397}
398
399static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
400 .probe = wm8711_probe,
401 .remove = wm8711_remove,
402 .suspend = wm8711_suspend,
403 .resume = wm8711_resume,
404 .set_bias_level = wm8711_set_bias_level,
405 .controls = wm8711_snd_controls,
406 .num_controls = ARRAY_SIZE(wm8711_snd_controls),
407 .dapm_widgets = wm8711_dapm_widgets,
408 .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets),
409 .dapm_routes = wm8711_intercon,
410 .num_dapm_routes = ARRAY_SIZE(wm8711_intercon),
411};
412
413static const struct of_device_id wm8711_of_match[] = {
414 { .compatible = "wlf,wm8711", },
415 { }
416};
417MODULE_DEVICE_TABLE(of, wm8711_of_match);
418
419static const struct regmap_config wm8711_regmap = {
420 .reg_bits = 7,
421 .val_bits = 9,
422 .max_register = WM8711_RESET,
423
424 .reg_defaults = wm8711_reg_defaults,
425 .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
426 .cache_type = REGCACHE_RBTREE,
427
428 .volatile_reg = wm8711_volatile,
429};
430
431#if defined(CONFIG_SPI_MASTER)
432static int wm8711_spi_probe(struct spi_device *spi)
433{
434 struct wm8711_priv *wm8711;
435 int ret;
436
437 wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
438 GFP_KERNEL);
439 if (wm8711 == NULL)
440 return -ENOMEM;
441
442 wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
443 if (IS_ERR(wm8711->regmap))
444 return PTR_ERR(wm8711->regmap);
445
446 spi_set_drvdata(spi, wm8711);
447
448 ret = snd_soc_register_codec(&spi->dev,
449 &soc_codec_dev_wm8711, &wm8711_dai, 1);
450
451 return ret;
452}
453
454static int wm8711_spi_remove(struct spi_device *spi)
455{
456 snd_soc_unregister_codec(&spi->dev);
457
458 return 0;
459}
460
461static struct spi_driver wm8711_spi_driver = {
462 .driver = {
463 .name = "wm8711",
464 .owner = THIS_MODULE,
465 .of_match_table = wm8711_of_match,
466 },
467 .probe = wm8711_spi_probe,
468 .remove = wm8711_spi_remove,
469};
470#endif
471
472#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
473static int wm8711_i2c_probe(struct i2c_client *client,
474 const struct i2c_device_id *id)
475{
476 struct wm8711_priv *wm8711;
477 int ret;
478
479 wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
480 GFP_KERNEL);
481 if (wm8711 == NULL)
482 return -ENOMEM;
483
484 wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
485 if (IS_ERR(wm8711->regmap))
486 return PTR_ERR(wm8711->regmap);
487
488 i2c_set_clientdata(client, wm8711);
489
490 ret = snd_soc_register_codec(&client->dev,
491 &soc_codec_dev_wm8711, &wm8711_dai, 1);
492
493 return ret;
494}
495
496static int wm8711_i2c_remove(struct i2c_client *client)
497{
498 snd_soc_unregister_codec(&client->dev);
499 return 0;
500}
501
502static const struct i2c_device_id wm8711_i2c_id[] = {
503 { "wm8711", 0 },
504 { }
505};
506MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
507
508static struct i2c_driver wm8711_i2c_driver = {
509 .driver = {
510 .name = "wm8711",
511 .owner = THIS_MODULE,
512 .of_match_table = wm8711_of_match,
513 },
514 .probe = wm8711_i2c_probe,
515 .remove = wm8711_i2c_remove,
516 .id_table = wm8711_i2c_id,
517};
518#endif
519
520static int __init wm8711_modinit(void)
521{
522 int ret;
523#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
524 ret = i2c_add_driver(&wm8711_i2c_driver);
525 if (ret != 0) {
526 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
527 ret);
528 }
529#endif
530#if defined(CONFIG_SPI_MASTER)
531 ret = spi_register_driver(&wm8711_spi_driver);
532 if (ret != 0) {
533 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
534 ret);
535 }
536#endif
537 return 0;
538}
539module_init(wm8711_modinit);
540
541static void __exit wm8711_exit(void)
542{
543#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
544 i2c_del_driver(&wm8711_i2c_driver);
545#endif
546#if defined(CONFIG_SPI_MASTER)
547 spi_unregister_driver(&wm8711_spi_driver);
548#endif
549}
550module_exit(wm8711_exit);
551
552MODULE_DESCRIPTION("ASoC WM8711 driver");
553MODULE_AUTHOR("Mike Arthur");
554MODULE_LICENSE("GPL");
555
