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Linux/sound/soc/codecs/wm8711.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * wm8711.c  --  WM8711 ALSA SoC Audio driver
  4  *
  5  * Copyright 2006 Wolfson Microelectronics
  6  *
  7  * Author: Mike Arthur <Mike.Arthur@wolfsonmicro.com>
  8  *
  9  * Based on wm8731.c by Richard Purdie
 10  */
 11 
 12 #include <linux/module.h>
 13 #include <linux/moduleparam.h>
 14 #include <linux/init.h>
 15 #include <linux/delay.h>
 16 #include <linux/pm.h>
 17 #include <linux/i2c.h>
 18 #include <linux/regmap.h>
 19 #include <linux/spi/spi.h>
 20 #include <linux/slab.h>
 21 #include <linux/of_device.h>
 22 #include <sound/core.h>
 23 #include <sound/pcm.h>
 24 #include <sound/pcm_params.h>
 25 #include <sound/soc.h>
 26 #include <sound/tlv.h>
 27 #include <sound/initval.h>
 28 
 29 #include "wm8711.h"
 30 
 31 /* codec private data */
 32 struct wm8711_priv {
 33         struct regmap *regmap;
 34         unsigned int sysclk;
 35 };
 36 
 37 /*
 38  * wm8711 register cache
 39  * We can't read the WM8711 register space when we are
 40  * using 2 wire for device control, so we cache them instead.
 41  * There is no point in caching the reset register
 42  */
 43 static const struct reg_default wm8711_reg_defaults[] = {
 44         { 0, 0x0079 }, { 1, 0x0079 }, { 2, 0x000a }, { 3, 0x0008 },
 45         { 4, 0x009f }, { 5, 0x000a }, { 6, 0x0000 }, { 7, 0x0000 },
 46 };
 47 
 48 static bool wm8711_volatile(struct device *dev, unsigned int reg)
 49 {
 50         switch (reg) {
 51         case WM8711_RESET:
 52                 return true;
 53         default:
 54                 return false;
 55         }
 56 }
 57 
 58 #define wm8711_reset(c) snd_soc_component_write(c, WM8711_RESET, 0)
 59 
 60 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 61 
 62 static const struct snd_kcontrol_new wm8711_snd_controls[] = {
 63 
 64 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
 65                  0, 127, 0, out_tlv),
 66 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
 67         7, 1, 0),
 68 
 69 };
 70 
 71 /* Output Mixer */
 72 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
 73 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
 74 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
 75 };
 76 
 77 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
 78 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
 79         &wm8711_output_mixer_controls[0],
 80         ARRAY_SIZE(wm8711_output_mixer_controls)),
 81 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
 82 SND_SOC_DAPM_OUTPUT("LOUT"),
 83 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 84 SND_SOC_DAPM_OUTPUT("ROUT"),
 85 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 86 };
 87 
 88 static const struct snd_soc_dapm_route wm8711_intercon[] = {
 89         /* output mixer */
 90         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 91         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 92 
 93         /* outputs */
 94         {"RHPOUT", NULL, "Output Mixer"},
 95         {"ROUT", NULL, "Output Mixer"},
 96         {"LHPOUT", NULL, "Output Mixer"},
 97         {"LOUT", NULL, "Output Mixer"},
 98 };
 99 
100 struct _coeff_div {
101         u32 mclk;
102         u32 rate;
103         u16 fs;
104         u8 sr:4;
105         u8 bosr:1;
106         u8 usb:1;
107 };
108 
109 /* codec mclk clock divider coefficients */
110 static const struct _coeff_div coeff_div[] = {
111         /* 48k */
112         {12288000, 48000, 256, 0x0, 0x0, 0x0},
113         {18432000, 48000, 384, 0x0, 0x1, 0x0},
114         {12000000, 48000, 250, 0x0, 0x0, 0x1},
115 
116         /* 32k */
117         {12288000, 32000, 384, 0x6, 0x0, 0x0},
118         {18432000, 32000, 576, 0x6, 0x1, 0x0},
119         {12000000, 32000, 375, 0x6, 0x0, 0x1},
120 
121         /* 8k */
122         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
123         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
124         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
125         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
126         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
127 
128         /* 96k */
129         {12288000, 96000, 128, 0x7, 0x0, 0x0},
130         {18432000, 96000, 192, 0x7, 0x1, 0x0},
131         {12000000, 96000, 125, 0x7, 0x0, 0x1},
132 
133         /* 44.1k */
134         {11289600, 44100, 256, 0x8, 0x0, 0x0},
135         {16934400, 44100, 384, 0x8, 0x1, 0x0},
136         {12000000, 44100, 272, 0x8, 0x1, 0x1},
137 
138         /* 88.2k */
139         {11289600, 88200, 128, 0xf, 0x0, 0x0},
140         {16934400, 88200, 192, 0xf, 0x1, 0x0},
141         {12000000, 88200, 136, 0xf, 0x1, 0x1},
142 };
143 
144 static inline int get_coeff(int mclk, int rate)
145 {
146         int i;
147 
148         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
149                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
150                         return i;
151         }
152         return 0;
153 }
154 
155 static int wm8711_hw_params(struct snd_pcm_substream *substream,
156         struct snd_pcm_hw_params *params,
157         struct snd_soc_dai *dai)
158 {
159         struct snd_soc_component *component = dai->component;
160         struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);
161         u16 iface = snd_soc_component_read32(component, WM8711_IFACE) & 0xfff3;
162         int i = get_coeff(wm8711->sysclk, params_rate(params));
163         u16 srate = (coeff_div[i].sr << 2) |
164                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
165 
166         snd_soc_component_write(component, WM8711_SRATE, srate);
167 
168         /* bit size */
169         switch (params_width(params)) {
170         case 16:
171                 break;
172         case 20:
173                 iface |= 0x0004;
174                 break;
175         case 24:
176                 iface |= 0x0008;
177                 break;
178         }
179 
180         snd_soc_component_write(component, WM8711_IFACE, iface);
181         return 0;
182 }
183 
184 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
185                               struct snd_soc_dai *dai)
186 {
187         struct snd_soc_component *component = dai->component;
188 
189         /* set active */
190         snd_soc_component_write(component, WM8711_ACTIVE, 0x0001);
191 
192         return 0;
193 }
194 
195 static void wm8711_shutdown(struct snd_pcm_substream *substream,
196                             struct snd_soc_dai *dai)
197 {
198         struct snd_soc_component *component = dai->component;
199 
200         /* deactivate */
201         if (!snd_soc_component_is_active(component)) {
202                 udelay(50);
203                 snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
204         }
205 }
206 
207 static int wm8711_mute(struct snd_soc_dai *dai, int mute)
208 {
209         struct snd_soc_component *component = dai->component;
210         u16 mute_reg = snd_soc_component_read32(component, WM8711_APDIGI) & 0xfff7;
211 
212         if (mute)
213                 snd_soc_component_write(component, WM8711_APDIGI, mute_reg | 0x8);
214         else
215                 snd_soc_component_write(component, WM8711_APDIGI, mute_reg);
216 
217         return 0;
218 }
219 
220 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
221                 int clk_id, unsigned int freq, int dir)
222 {
223         struct snd_soc_component *component = codec_dai->component;
224         struct wm8711_priv *wm8711 =  snd_soc_component_get_drvdata(component);
225 
226         switch (freq) {
227         case 11289600:
228         case 12000000:
229         case 12288000:
230         case 16934400:
231         case 18432000:
232                 wm8711->sysclk = freq;
233                 return 0;
234         }
235         return -EINVAL;
236 }
237 
238 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
239                 unsigned int fmt)
240 {
241         struct snd_soc_component *component = codec_dai->component;
242         u16 iface = snd_soc_component_read32(component, WM8711_IFACE) & 0x000c;
243 
244         /* set master/slave audio interface */
245         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
246         case SND_SOC_DAIFMT_CBM_CFM:
247                 iface |= 0x0040;
248                 break;
249         case SND_SOC_DAIFMT_CBS_CFS:
250                 break;
251         default:
252                 return -EINVAL;
253         }
254 
255         /* interface format */
256         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
257         case SND_SOC_DAIFMT_I2S:
258                 iface |= 0x0002;
259                 break;
260         case SND_SOC_DAIFMT_RIGHT_J:
261                 break;
262         case SND_SOC_DAIFMT_LEFT_J:
263                 iface |= 0x0001;
264                 break;
265         case SND_SOC_DAIFMT_DSP_A:
266                 iface |= 0x0003;
267                 break;
268         case SND_SOC_DAIFMT_DSP_B:
269                 iface |= 0x0013;
270                 break;
271         default:
272                 return -EINVAL;
273         }
274 
275         /* clock inversion */
276         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
277         case SND_SOC_DAIFMT_NB_NF:
278                 break;
279         case SND_SOC_DAIFMT_IB_IF:
280                 iface |= 0x0090;
281                 break;
282         case SND_SOC_DAIFMT_IB_NF:
283                 iface |= 0x0080;
284                 break;
285         case SND_SOC_DAIFMT_NB_IF:
286                 iface |= 0x0010;
287                 break;
288         default:
289                 return -EINVAL;
290         }
291 
292         /* set iface */
293         snd_soc_component_write(component, WM8711_IFACE, iface);
294         return 0;
295 }
296 
297 static int wm8711_set_bias_level(struct snd_soc_component *component,
298         enum snd_soc_bias_level level)
299 {
300         struct wm8711_priv *wm8711 = snd_soc_component_get_drvdata(component);
301         u16 reg = snd_soc_component_read32(component, WM8711_PWR) & 0xff7f;
302 
303         switch (level) {
304         case SND_SOC_BIAS_ON:
305                 snd_soc_component_write(component, WM8711_PWR, reg);
306                 break;
307         case SND_SOC_BIAS_PREPARE:
308                 break;
309         case SND_SOC_BIAS_STANDBY:
310                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF)
311                         regcache_sync(wm8711->regmap);
312 
313                 snd_soc_component_write(component, WM8711_PWR, reg | 0x0040);
314                 break;
315         case SND_SOC_BIAS_OFF:
316                 snd_soc_component_write(component, WM8711_ACTIVE, 0x0);
317                 snd_soc_component_write(component, WM8711_PWR, 0xffff);
318                 break;
319         }
320         return 0;
321 }
322 
323 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000
324 
325 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
326         SNDRV_PCM_FMTBIT_S24_LE)
327 
328 static const struct snd_soc_dai_ops wm8711_ops = {
329         .prepare = wm8711_pcm_prepare,
330         .hw_params = wm8711_hw_params,
331         .shutdown = wm8711_shutdown,
332         .digital_mute = wm8711_mute,
333         .set_sysclk = wm8711_set_dai_sysclk,
334         .set_fmt = wm8711_set_dai_fmt,
335 };
336 
337 static struct snd_soc_dai_driver wm8711_dai = {
338         .name = "wm8711-hifi",
339         .playback = {
340                 .stream_name = "Playback",
341                 .channels_min = 1,
342                 .channels_max = 2,
343                 .rates = WM8711_RATES,
344                 .formats = WM8711_FORMATS,
345         },
346         .ops = &wm8711_ops,
347 };
348 
349 static int wm8711_probe(struct snd_soc_component *component)
350 {
351         int ret;
352 
353         ret = wm8711_reset(component);
354         if (ret < 0) {
355                 dev_err(component->dev, "Failed to issue reset\n");
356                 return ret;
357         }
358 
359         /* Latch the update bits */
360         snd_soc_component_update_bits(component, WM8711_LOUT1V, 0x0100, 0x0100);
361         snd_soc_component_update_bits(component, WM8711_ROUT1V, 0x0100, 0x0100);
362 
363         return ret;
364 
365 }
366 
367 static const struct snd_soc_component_driver soc_component_dev_wm8711 = {
368         .probe                  = wm8711_probe,
369         .set_bias_level         = wm8711_set_bias_level,
370         .controls               = wm8711_snd_controls,
371         .num_controls           = ARRAY_SIZE(wm8711_snd_controls),
372         .dapm_widgets           = wm8711_dapm_widgets,
373         .num_dapm_widgets       = ARRAY_SIZE(wm8711_dapm_widgets),
374         .dapm_routes            = wm8711_intercon,
375         .num_dapm_routes        = ARRAY_SIZE(wm8711_intercon),
376         .suspend_bias_off       = 1,
377         .idle_bias_on           = 1,
378         .use_pmdown_time        = 1,
379         .endianness             = 1,
380         .non_legacy_dai_naming  = 1,
381 };
382 
383 static const struct of_device_id wm8711_of_match[] = {
384         { .compatible = "wlf,wm8711", },
385         { }
386 };
387 MODULE_DEVICE_TABLE(of, wm8711_of_match);
388 
389 static const struct regmap_config wm8711_regmap = {
390         .reg_bits = 7,
391         .val_bits = 9,
392         .max_register = WM8711_RESET,
393 
394         .reg_defaults = wm8711_reg_defaults,
395         .num_reg_defaults = ARRAY_SIZE(wm8711_reg_defaults),
396         .cache_type = REGCACHE_RBTREE,
397 
398         .volatile_reg = wm8711_volatile,
399 };
400 
401 #if defined(CONFIG_SPI_MASTER)
402 static int wm8711_spi_probe(struct spi_device *spi)
403 {
404         struct wm8711_priv *wm8711;
405         int ret;
406 
407         wm8711 = devm_kzalloc(&spi->dev, sizeof(struct wm8711_priv),
408                               GFP_KERNEL);
409         if (wm8711 == NULL)
410                 return -ENOMEM;
411 
412         wm8711->regmap = devm_regmap_init_spi(spi, &wm8711_regmap);
413         if (IS_ERR(wm8711->regmap))
414                 return PTR_ERR(wm8711->regmap);
415 
416         spi_set_drvdata(spi, wm8711);
417 
418         ret = devm_snd_soc_register_component(&spi->dev,
419                         &soc_component_dev_wm8711, &wm8711_dai, 1);
420 
421         return ret;
422 }
423 
424 static struct spi_driver wm8711_spi_driver = {
425         .driver = {
426                 .name   = "wm8711",
427                 .of_match_table = wm8711_of_match,
428         },
429         .probe          = wm8711_spi_probe,
430 };
431 #endif /* CONFIG_SPI_MASTER */
432 
433 #if IS_ENABLED(CONFIG_I2C)
434 static int wm8711_i2c_probe(struct i2c_client *client,
435                             const struct i2c_device_id *id)
436 {
437         struct wm8711_priv *wm8711;
438         int ret;
439 
440         wm8711 = devm_kzalloc(&client->dev, sizeof(struct wm8711_priv),
441                               GFP_KERNEL);
442         if (wm8711 == NULL)
443                 return -ENOMEM;
444 
445         wm8711->regmap = devm_regmap_init_i2c(client, &wm8711_regmap);
446         if (IS_ERR(wm8711->regmap))
447                 return PTR_ERR(wm8711->regmap);
448 
449         i2c_set_clientdata(client, wm8711);
450 
451         ret = devm_snd_soc_register_component(&client->dev,
452                         &soc_component_dev_wm8711, &wm8711_dai, 1);
453 
454         return ret;
455 }
456 
457 static const struct i2c_device_id wm8711_i2c_id[] = {
458         { "wm8711", 0 },
459         { }
460 };
461 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
462 
463 static struct i2c_driver wm8711_i2c_driver = {
464         .driver = {
465                 .name = "wm8711",
466                 .of_match_table = wm8711_of_match,
467         },
468         .probe =    wm8711_i2c_probe,
469         .id_table = wm8711_i2c_id,
470 };
471 #endif
472 
473 static int __init wm8711_modinit(void)
474 {
475         int ret;
476 #if IS_ENABLED(CONFIG_I2C)
477         ret = i2c_add_driver(&wm8711_i2c_driver);
478         if (ret != 0) {
479                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
480                        ret);
481         }
482 #endif
483 #if defined(CONFIG_SPI_MASTER)
484         ret = spi_register_driver(&wm8711_spi_driver);
485         if (ret != 0) {
486                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
487                        ret);
488         }
489 #endif
490         return 0;
491 }
492 module_init(wm8711_modinit);
493 
494 static void __exit wm8711_exit(void)
495 {
496 #if IS_ENABLED(CONFIG_I2C)
497         i2c_del_driver(&wm8711_i2c_driver);
498 #endif
499 #if defined(CONFIG_SPI_MASTER)
500         spi_unregister_driver(&wm8711_spi_driver);
501 #endif
502 }
503 module_exit(wm8711_exit);
504 
505 MODULE_DESCRIPTION("ASoC WM8711 driver");
506 MODULE_AUTHOR("Mike Arthur");
507 MODULE_LICENSE("GPL");
508 

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