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TOMOYO Linux Cross Reference
Linux/sound/soc/codecs/wm8776.c

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  1 /*
  2  * wm8776.c  --  WM8776 ALSA SoC Audio driver
  3  *
  4  * Copyright 2009-12 Wolfson Microelectronics plc
  5  *
  6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  7  *
  8  * This program is free software; you can redistribute it and/or modify
  9  * it under the terms of the GNU General Public License version 2 as
 10  * published by the Free Software Foundation.
 11  *
 12  * TODO: Input ALC/limiter support
 13  */
 14 
 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/of_device.h>
 22 #include <linux/regmap.h>
 23 #include <linux/spi/spi.h>
 24 #include <linux/slab.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/initval.h>
 30 #include <sound/tlv.h>
 31 
 32 #include "wm8776.h"
 33 
 34 enum wm8776_chip_type {
 35         WM8775 = 1,
 36         WM8776,
 37 };
 38 
 39 /* codec private data */
 40 struct wm8776_priv {
 41         struct regmap *regmap;
 42         int sysclk[2];
 43 };
 44 
 45 static const struct reg_default wm8776_reg_defaults[] = {
 46         {  0, 0x79 },
 47         {  1, 0x79 },
 48         {  2, 0x79 },
 49         {  3, 0xff },
 50         {  4, 0xff },
 51         {  5, 0xff },
 52         {  6, 0x00 },
 53         {  7, 0x90 },
 54         {  8, 0x00 },
 55         {  9, 0x00 },
 56         { 10, 0x22 },
 57         { 11, 0x22 },
 58         { 12, 0x22 },
 59         { 13, 0x08 },
 60         { 14, 0xcf },
 61         { 15, 0xcf },
 62         { 16, 0x7b },
 63         { 17, 0x00 },
 64         { 18, 0x32 },
 65         { 19, 0x00 },
 66         { 20, 0xa6 },
 67         { 21, 0x01 },
 68         { 22, 0x01 },
 69 };
 70 
 71 static bool wm8776_volatile(struct device *dev, unsigned int reg)
 72 {
 73         switch (reg) {
 74         case WM8776_RESET:
 75                 return true;
 76         default:
 77                 return false;
 78         }
 79 }
 80 
 81 static int wm8776_reset(struct snd_soc_codec *codec)
 82 {
 83         return snd_soc_write(codec, WM8776_RESET, 0);
 84 }
 85 
 86 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
 87 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
 88 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
 89 
 90 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
 91 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
 92                  0, 127, 0, hp_tlv),
 93 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
 94                  0, 255, 0, dac_tlv),
 95 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
 96 
 97 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
 98 
 99 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
100                  0, 255, 0, adc_tlv),
101 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
102 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
103 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
104 };
105 
106 static const struct snd_kcontrol_new inmix_controls[] = {
107 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
108 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
109 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
110 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
111 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
112 };
113 
114 static const struct snd_kcontrol_new outmix_controls[] = {
115 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
116 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
117 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
118 };
119 
120 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
121 SND_SOC_DAPM_INPUT("AUX"),
122 
123 SND_SOC_DAPM_INPUT("AIN1"),
124 SND_SOC_DAPM_INPUT("AIN2"),
125 SND_SOC_DAPM_INPUT("AIN3"),
126 SND_SOC_DAPM_INPUT("AIN4"),
127 SND_SOC_DAPM_INPUT("AIN5"),
128 
129 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
130                    inmix_controls, ARRAY_SIZE(inmix_controls)),
131 
132 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
133 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
134 
135 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
136                    outmix_controls, ARRAY_SIZE(outmix_controls)),
137 
138 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
139 
140 SND_SOC_DAPM_OUTPUT("VOUT"),
141 
142 SND_SOC_DAPM_OUTPUT("HPOUTL"),
143 SND_SOC_DAPM_OUTPUT("HPOUTR"),
144 };
145 
146 static const struct snd_soc_dapm_route routes[] = {
147         { "Input Mixer", "AIN1 Switch", "AIN1" },
148         { "Input Mixer", "AIN2 Switch", "AIN2" },
149         { "Input Mixer", "AIN3 Switch", "AIN3" },
150         { "Input Mixer", "AIN4 Switch", "AIN4" },
151         { "Input Mixer", "AIN5 Switch", "AIN5" },
152 
153         { "ADC", NULL, "Input Mixer" },
154 
155         { "Output Mixer", "DAC Switch", "DAC" },
156         { "Output Mixer", "AUX Switch", "AUX" },
157         { "Output Mixer", "Bypass Switch", "Input Mixer" },
158 
159         { "VOUT", NULL, "Output Mixer" },
160 
161         { "Headphone PGA", NULL, "Output Mixer" },
162 
163         { "HPOUTL", NULL, "Headphone PGA" },
164         { "HPOUTR", NULL, "Headphone PGA" },
165 };
166 
167 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
168 {
169         struct snd_soc_codec *codec = dai->codec;
170         int reg, iface, master;
171 
172         switch (dai->driver->id) {
173         case WM8776_DAI_DAC:
174                 reg = WM8776_DACIFCTRL;
175                 master = 0x80;
176                 break;
177         case WM8776_DAI_ADC:
178                 reg = WM8776_ADCIFCTRL;
179                 master = 0x100;
180                 break;
181         default:
182                 return -EINVAL;
183         }
184 
185         iface = 0;
186 
187         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
188         case SND_SOC_DAIFMT_CBM_CFM:
189                 break;
190         case SND_SOC_DAIFMT_CBS_CFS:
191                 master = 0;
192                 break;
193         default:
194                 return -EINVAL;
195         }
196 
197         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
198         case SND_SOC_DAIFMT_I2S:
199                 iface |= 0x0002;
200                 break;
201         case SND_SOC_DAIFMT_RIGHT_J:
202                 break;
203         case SND_SOC_DAIFMT_LEFT_J:
204                 iface |= 0x0001;
205                 break;
206         default:
207                 return -EINVAL;
208         }
209 
210         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
211         case SND_SOC_DAIFMT_NB_NF:
212                 break;
213         case SND_SOC_DAIFMT_IB_IF:
214                 iface |= 0x00c;
215                 break;
216         case SND_SOC_DAIFMT_IB_NF:
217                 iface |= 0x008;
218                 break;
219         case SND_SOC_DAIFMT_NB_IF:
220                 iface |= 0x004;
221                 break;
222         default:
223                 return -EINVAL;
224         }
225 
226         /* Finally, write out the values */
227         snd_soc_update_bits(codec, reg, 0xf, iface);
228         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
229 
230         return 0;
231 }
232 
233 static int mclk_ratios[] = {
234         128,
235         192,
236         256,
237         384,
238         512,
239         768,
240 };
241 
242 static int wm8776_hw_params(struct snd_pcm_substream *substream,
243                             struct snd_pcm_hw_params *params,
244                             struct snd_soc_dai *dai)
245 {
246         struct snd_soc_codec *codec = dai->codec;
247         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
248         int iface_reg, iface;
249         int ratio_shift, master;
250         int i;
251 
252         switch (dai->driver->id) {
253         case WM8776_DAI_DAC:
254                 iface_reg = WM8776_DACIFCTRL;
255                 master = 0x80;
256                 ratio_shift = 4;
257                 break;
258         case WM8776_DAI_ADC:
259                 iface_reg = WM8776_ADCIFCTRL;
260                 master = 0x100;
261                 ratio_shift = 0;
262                 break;
263         default:
264                 return -EINVAL;
265         }
266 
267         /* Set word length */
268         switch (snd_pcm_format_width(params_format(params))) {
269         case 16:
270                 iface = 0;
271                 break;
272         case 20:
273                 iface = 0x10;
274                 break;
275         case 24:
276                 iface = 0x20;
277                 break;
278         case 32:
279                 iface = 0x30;
280                 break;
281         default:
282                 dev_err(codec->dev, "Unsupported sample size: %i\n",
283                         snd_pcm_format_width(params_format(params)));
284                 return -EINVAL;
285         }
286 
287         /* Only need to set MCLK/LRCLK ratio if we're master */
288         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
289                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
290                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
291                             == mclk_ratios[i])
292                                 break;
293                 }
294 
295                 if (i == ARRAY_SIZE(mclk_ratios)) {
296                         dev_err(codec->dev,
297                                 "Unable to configure MCLK ratio %d/%d\n",
298                                 wm8776->sysclk[dai->driver->id], params_rate(params));
299                         return -EINVAL;
300                 }
301 
302                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
303 
304                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
305                                     0x7 << ratio_shift, i << ratio_shift);
306         } else {
307                 dev_dbg(codec->dev, "DAI in slave mode\n");
308         }
309 
310         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
311 
312         return 0;
313 }
314 
315 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
316 {
317         struct snd_soc_codec *codec = dai->codec;
318 
319         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
320 }
321 
322 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
323                              int clk_id, unsigned int freq, int dir)
324 {
325         struct snd_soc_codec *codec = dai->codec;
326         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
327 
328         BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
329 
330         wm8776->sysclk[dai->driver->id] = freq;
331 
332         return 0;
333 }
334 
335 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
336                                  enum snd_soc_bias_level level)
337 {
338         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
339 
340         switch (level) {
341         case SND_SOC_BIAS_ON:
342                 break;
343         case SND_SOC_BIAS_PREPARE:
344                 break;
345         case SND_SOC_BIAS_STANDBY:
346                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
347                         regcache_sync(wm8776->regmap);
348 
349                         /* Disable the global powerdown; DAPM does the rest */
350                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
351                 }
352 
353                 break;
354         case SND_SOC_BIAS_OFF:
355                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
356                 break;
357         }
358 
359         codec->dapm.bias_level = level;
360         return 0;
361 }
362 
363 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
364                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
365 
366 static const struct snd_soc_dai_ops wm8776_dac_ops = {
367         .digital_mute   = wm8776_mute,
368         .hw_params      = wm8776_hw_params,
369         .set_fmt        = wm8776_set_fmt,
370         .set_sysclk     = wm8776_set_sysclk,
371 };
372 
373 static const struct snd_soc_dai_ops wm8776_adc_ops = {
374         .hw_params      = wm8776_hw_params,
375         .set_fmt        = wm8776_set_fmt,
376         .set_sysclk     = wm8776_set_sysclk,
377 };
378 
379 static struct snd_soc_dai_driver wm8776_dai[] = {
380         {
381                 .name = "wm8776-hifi-playback",
382                 .id     = WM8776_DAI_DAC,
383                 .playback = {
384                         .stream_name = "Playback",
385                         .channels_min = 2,
386                         .channels_max = 2,
387                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
388                         .rate_min = 32000,
389                         .rate_max = 192000,
390                         .formats = WM8776_FORMATS,
391                 },
392                 .ops = &wm8776_dac_ops,
393         },
394         {
395                 .name = "wm8776-hifi-capture",
396                 .id     = WM8776_DAI_ADC,
397                 .capture = {
398                         .stream_name = "Capture",
399                         .channels_min = 2,
400                         .channels_max = 2,
401                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
402                         .rate_min = 32000,
403                         .rate_max = 96000,
404                         .formats = WM8776_FORMATS,
405                 },
406                 .ops = &wm8776_adc_ops,
407         },
408 };
409 
410 #ifdef CONFIG_PM
411 static int wm8776_suspend(struct snd_soc_codec *codec)
412 {
413         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
414 
415         return 0;
416 }
417 
418 static int wm8776_resume(struct snd_soc_codec *codec)
419 {
420         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
421         return 0;
422 }
423 #else
424 #define wm8776_suspend NULL
425 #define wm8776_resume NULL
426 #endif
427 
428 static int wm8776_probe(struct snd_soc_codec *codec)
429 {
430         int ret = 0;
431 
432         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
433         if (ret < 0) {
434                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
435                 return ret;
436         }
437 
438         ret = wm8776_reset(codec);
439         if (ret < 0) {
440                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
441                 return ret;
442         }
443 
444         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
445 
446         /* Latch the update bits; right channel only since we always
447          * update both. */
448         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
449         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
450 
451         return ret;
452 }
453 
454 /* power down chip */
455 static int wm8776_remove(struct snd_soc_codec *codec)
456 {
457         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
458         return 0;
459 }
460 
461 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
462         .probe =        wm8776_probe,
463         .remove =       wm8776_remove,
464         .suspend =      wm8776_suspend,
465         .resume =       wm8776_resume,
466         .set_bias_level = wm8776_set_bias_level,
467 
468         .controls = wm8776_snd_controls,
469         .num_controls = ARRAY_SIZE(wm8776_snd_controls),
470         .dapm_widgets = wm8776_dapm_widgets,
471         .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
472         .dapm_routes = routes,
473         .num_dapm_routes = ARRAY_SIZE(routes),
474 };
475 
476 static const struct of_device_id wm8776_of_match[] = {
477         { .compatible = "wlf,wm8776", },
478         { }
479 };
480 MODULE_DEVICE_TABLE(of, wm8776_of_match);
481 
482 static const struct regmap_config wm8776_regmap = {
483         .reg_bits = 7,
484         .val_bits = 9,
485         .max_register = WM8776_RESET,
486 
487         .reg_defaults = wm8776_reg_defaults,
488         .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
489         .cache_type = REGCACHE_RBTREE,
490 
491         .volatile_reg = wm8776_volatile,
492 };
493 
494 #if defined(CONFIG_SPI_MASTER)
495 static int __devinit wm8776_spi_probe(struct spi_device *spi)
496 {
497         struct wm8776_priv *wm8776;
498         int ret;
499 
500         wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
501                               GFP_KERNEL);
502         if (wm8776 == NULL)
503                 return -ENOMEM;
504 
505         wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
506         if (IS_ERR(wm8776->regmap))
507                 return PTR_ERR(wm8776->regmap);
508 
509         spi_set_drvdata(spi, wm8776);
510 
511         ret = snd_soc_register_codec(&spi->dev,
512                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
513 
514         return ret;
515 }
516 
517 static int __devexit wm8776_spi_remove(struct spi_device *spi)
518 {
519         snd_soc_unregister_codec(&spi->dev);
520         return 0;
521 }
522 
523 static struct spi_driver wm8776_spi_driver = {
524         .driver = {
525                 .name   = "wm8776",
526                 .owner  = THIS_MODULE,
527                 .of_match_table = wm8776_of_match,
528         },
529         .probe          = wm8776_spi_probe,
530         .remove         = __devexit_p(wm8776_spi_remove),
531 };
532 #endif /* CONFIG_SPI_MASTER */
533 
534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
535 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
536                                       const struct i2c_device_id *id)
537 {
538         struct wm8776_priv *wm8776;
539         int ret;
540 
541         wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
542                               GFP_KERNEL);
543         if (wm8776 == NULL)
544                 return -ENOMEM;
545 
546         wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
547         if (IS_ERR(wm8776->regmap))
548                 return PTR_ERR(wm8776->regmap);
549 
550         i2c_set_clientdata(i2c, wm8776);
551 
552         ret =  snd_soc_register_codec(&i2c->dev,
553                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
554 
555         return ret;
556 }
557 
558 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
559 {
560         snd_soc_unregister_codec(&client->dev);
561         return 0;
562 }
563 
564 static const struct i2c_device_id wm8776_i2c_id[] = {
565         { "wm8775", WM8775 },
566         { "wm8776", WM8776 },
567         { }
568 };
569 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
570 
571 static struct i2c_driver wm8776_i2c_driver = {
572         .driver = {
573                 .name = "wm8776",
574                 .owner = THIS_MODULE,
575                 .of_match_table = wm8776_of_match,
576         },
577         .probe =    wm8776_i2c_probe,
578         .remove =   __devexit_p(wm8776_i2c_remove),
579         .id_table = wm8776_i2c_id,
580 };
581 #endif
582 
583 static int __init wm8776_modinit(void)
584 {
585         int ret = 0;
586 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
587         ret = i2c_add_driver(&wm8776_i2c_driver);
588         if (ret != 0) {
589                 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
590                        ret);
591         }
592 #endif
593 #if defined(CONFIG_SPI_MASTER)
594         ret = spi_register_driver(&wm8776_spi_driver);
595         if (ret != 0) {
596                 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
597                        ret);
598         }
599 #endif
600         return ret;
601 }
602 module_init(wm8776_modinit);
603 
604 static void __exit wm8776_exit(void)
605 {
606 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
607         i2c_del_driver(&wm8776_i2c_driver);
608 #endif
609 #if defined(CONFIG_SPI_MASTER)
610         spi_unregister_driver(&wm8776_spi_driver);
611 #endif
612 }
613 module_exit(wm8776_exit);
614 
615 MODULE_DESCRIPTION("ASoC WM8776 driver");
616 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
617 MODULE_LICENSE("GPL");
618 

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