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Linux/sound/soc/codecs/wm8711.c

  1 /*
  2  * wm8711.c  --  WM8711 ALSA SoC Audio driver
  3  *
  4  * Copyright 2006 Wolfson Microelectronics
  5  *
  6  * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
  7  *
  8  * Based on wm8731.c by Richard Purdie
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU General Public License version 2 as
 12  * published by the Free Software Foundation.
 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/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 /* codec private data */
 35 struct wm8711_priv {
 36         struct regmap *regmap;
 37         unsigned int sysclk;
 38 };
 39 
 40 /*
 41  * wm8711 register cache
 42  * We can't read the WM8711 register space when we are
 43  * using 2 wire for device control, so we cache them instead.
 44  * There is no point in caching the reset register
 45  */
 46 static 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 
 51 static 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 
 63 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 64 
 65 static const struct snd_kcontrol_new wm8711_snd_controls[] = {
 66 
 67 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
 68                  0, 127, 0, out_tlv),
 69 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
 70         7, 1, 0),
 71 
 72 };
 73 
 74 /* Output Mixer */
 75 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
 76 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
 77 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
 78 };
 79 
 80 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
 81 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
 82         &wm8711_output_mixer_controls[0],
 83         ARRAY_SIZE(wm8711_output_mixer_controls)),
 84 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
 85 SND_SOC_DAPM_OUTPUT("LOUT"),
 86 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 87 SND_SOC_DAPM_OUTPUT("ROUT"),
 88 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 89 };
 90 
 91 static const struct snd_soc_dapm_route wm8711_intercon[] = {
 92         /* output mixer */
 93         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 94         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 95 
 96         /* outputs */
 97         {"RHPOUT", NULL, "Output Mixer"},
 98         {"ROUT", NULL, "Output Mixer"},
 99         {"LHPOUT", NULL, "Output Mixer"},
100         {"LOUT", NULL, "Output Mixer"},
101 };
102 
103 struct _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 /* codec mclk clock divider coefficients */
113 static const struct _coeff_div coeff_div[] = {
114         /* 48k */
115         {12288000, 48000, 256, 0x0, 0x0, 0x0},
116         {18432000, 48000, 384, 0x0, 0x1, 0x0},
117         {12000000, 48000, 250, 0x0, 0x0, 0x1},
118 
119         /* 32k */
120         {12288000, 32000, 384, 0x6, 0x0, 0x0},
121         {18432000, 32000, 576, 0x6, 0x1, 0x0},
122         {12000000, 32000, 375, 0x6, 0x0, 0x1},
123 
124         /* 8k */
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         /* 96k */
132         {12288000, 96000, 128, 0x7, 0x0, 0x0},
133         {18432000, 96000, 192, 0x7, 0x1, 0x0},
134         {12000000, 96000, 125, 0x7, 0x0, 0x1},
135 
136         /* 44.1k */
137         {11289600, 44100, 256, 0x8, 0x0, 0x0},
138         {16934400, 44100, 384, 0x8, 0x1, 0x0},
139         {12000000, 44100, 272, 0x8, 0x1, 0x1},
140 
141         /* 88.2k */
142         {11289600, 88200, 128, 0xf, 0x0, 0x0},
143         {16934400, 88200, 192, 0xf, 0x1, 0x0},
144         {12000000, 88200, 136, 0xf, 0x1, 0x1},
145 };
146 
147 static 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 
158 static 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         /* bit size */
172         switch (params_width(params)) {
173         case 16:
174                 break;
175         case 20:
176                 iface |= 0x0004;
177                 break;
178         case 24:
179                 iface |= 0x0008;
180                 break;
181         }
182 
183         snd_soc_write(codec, WM8711_IFACE, iface);
184         return 0;
185 }
186 
187 static 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         /* set active */
193         snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
194 
195         return 0;
196 }
197 
198 static 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         /* deactivate */
204         if (!snd_soc_codec_is_active(codec)) {
205                 udelay(50);
206                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
207         }
208 }
209 
210 static 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 
223 static 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 
241 static 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         /* set master/slave audio interface */
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         /* interface format */
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         /* clock inversion */
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         /* set iface */
296         snd_soc_write(codec, WM8711_IFACE, iface);
297         return 0;
298 }
299 
300 static 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 
332 static 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 
341 static 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 
353 static 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 
360 static int wm8711_resume(struct snd_soc_codec *codec)
361 {
362         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
363         return 0;
364 }
365 
366 static int wm8711_probe(struct snd_soc_codec *codec)
367 {
368         int ret;
369 
370         ret = wm8711_reset(codec);
371         if (ret < 0) {
372                 dev_err(codec->dev, "Failed to issue reset\n");
373                 return ret;
374         }
375 
376         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
377 
378         /* Latch the update bits */
379         snd_soc_update_bits(codec, WM8711_LOUT1V, 0x0100, 0x0100);
380         snd_soc_update_bits(codec, WM8711_ROUT1V, 0x0100, 0x0100);
381 
382         return ret;
383 
384 }
385 
386 /* power down chip */
387 static int wm8711_remove(struct snd_soc_codec *codec)
388 {
389         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
390         return 0;
391 }
392 
393 static struct snd_soc_codec_driver soc_codec_dev_wm8711 = {
394         .probe =        wm8711_probe,
395         .remove =       wm8711_remove,
396         .suspend =      wm8711_suspend,
397         .resume =       wm8711_resume,
398         .set_bias_level = wm8711_set_bias_level,
399         .controls = wm8711_snd_controls,
400         .num_controls = ARRAY_SIZE(wm8711_snd_controls),
401         .dapm_widgets = wm8711_dapm_widgets,
402         .num_dapm_widgets = ARRAY_SIZE(wm8711_dapm_widgets),
403         .dapm_routes = wm8711_intercon,
404         .num_dapm_routes = ARRAY_SIZE(wm8711_intercon),
405 };
406 
407 static const struct of_device_id wm8711_of_match[] = {
408         { .compatible = "wlf,wm8711", },
409         { }
410 };
411 MODULE_DEVICE_TABLE(of, wm8711_of_match);
412 
413 static const struct regmap_config wm8711_regmap = {
414         .reg_bits = 7,
415         .val_bits = 9,
416         .max_register = WM8711_RESET,
417 
418         .reg_defaults = wm8711_reg_defaults,
419         .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
420         .cache_type = REGCACHE_RBTREE,
421 
422         .volatile_reg = wm8711_volatile,
423 };
424 
425 #if defined(CONFIG_SPI_MASTER)
426 static int wm8711_spi_probe(struct spi_device *spi)
427 {
428         struct wm8711_priv *wm8711;
429         int ret;
430 
431         wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
432                               GFP_KERNEL);
433         if (wm8711 == NULL)
434                 return -ENOMEM;
435 
436         wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
437         if (IS_ERR(wm8711->regmap))
438                 return PTR_ERR(wm8711->regmap);
439 
440         spi_set_drvdata(spi, wm8711);
441 
442         ret = snd_soc_register_codec(&spi->dev,
443                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
444 
445         return ret;
446 }
447 
448 static int wm8711_spi_remove(struct spi_device *spi)
449 {
450         snd_soc_unregister_codec(&spi->dev);
451 
452         return 0;
453 }
454 
455 static struct spi_driver wm8711_spi_driver = {
456         .driver = {
457                 .name   = "wm8711",
458                 .owner  = THIS_MODULE,
459                 .of_match_table = wm8711_of_match,
460         },
461         .probe          = wm8711_spi_probe,
462         .remove         = wm8711_spi_remove,
463 };
464 #endif /* CONFIG_SPI_MASTER */
465 
466 #if IS_ENABLED(CONFIG_I2C)
467 static int wm8711_i2c_probe(struct i2c_client *client,
468                             const struct i2c_device_id *id)
469 {
470         struct wm8711_priv *wm8711;
471         int ret;
472 
473         wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
474                               GFP_KERNEL);
475         if (wm8711 == NULL)
476                 return -ENOMEM;
477 
478         wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
479         if (IS_ERR(wm8711->regmap))
480                 return PTR_ERR(wm8711->regmap);
481 
482         i2c_set_clientdata(client, wm8711);
483 
484         ret =  snd_soc_register_codec(&client->dev,
485                         &soc_codec_dev_wm8711, &wm8711_dai, 1);
486 
487         return ret;
488 }
489 
490 static int wm8711_i2c_remove(struct i2c_client *client)
491 {
492         snd_soc_unregister_codec(&client->dev);
493         return 0;
494 }
495 
496 static const struct i2c_device_id wm8711_i2c_id[] = {
497         { "wm8711", 0 },
498         { }
499 };
500 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
501 
502 static struct i2c_driver wm8711_i2c_driver = {
503         .driver = {
504                 .name = "wm8711",
505                 .owner = THIS_MODULE,
506                 .of_match_table = wm8711_of_match,
507         },
508         .probe =    wm8711_i2c_probe,
509         .remove =   wm8711_i2c_remove,
510         .id_table = wm8711_i2c_id,
511 };
512 #endif
513 
514 static int __init wm8711_modinit(void)
515 {
516         int ret;
517 #if IS_ENABLED(CONFIG_I2C)
518         ret = i2c_add_driver(&wm8711_i2c_driver);
519         if (ret != 0) {
520                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
521                        ret);
522         }
523 #endif
524 #if defined(CONFIG_SPI_MASTER)
525         ret = spi_register_driver(&wm8711_spi_driver);
526         if (ret != 0) {
527                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
528                        ret);
529         }
530 #endif
531         return 0;
532 }
533 module_init(wm8711_modinit);
534 
535 static void __exit wm8711_exit(void)
536 {
537 #if IS_ENABLED(CONFIG_I2C)
538         i2c_del_driver(&wm8711_i2c_driver);
539 #endif
540 #if defined(CONFIG_SPI_MASTER)
541         spi_unregister_driver(&wm8711_spi_driver);
542 #endif
543 }
544 module_exit(wm8711_exit);
545 
546 MODULE_DESCRIPTION("ASoC WM8711 driver");
547 MODULE_AUTHOR("Mike Arthur");
548 MODULE_LICENSE("GPL");
549 

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