2 * wm8741.c -- WM8741 ALSA SoC Audio driver
4 * Copyright 2010-1 Wolfson Microelectronics plc
6 * Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
19 #include <linux/i2c.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 <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/initval.h>
30 #include <sound/tlv.h>
34 #define WM8741_NUM_SUPPLIES 2
35 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
40 /* codec private data */
42 struct wm8741_platform_data pdata;
43 struct regmap *regmap;
44 struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
46 const struct snd_pcm_hw_constraint_list *sysclk_constraints;
49 static const struct reg_default wm8741_reg_defaults[] = {
50 { 0, 0x0000 }, /* R0 - DACLLSB Attenuation */
51 { 1, 0x0000 }, /* R1 - DACLMSB Attenuation */
52 { 2, 0x0000 }, /* R2 - DACRLSB Attenuation */
53 { 3, 0x0000 }, /* R3 - DACRMSB Attenuation */
54 { 4, 0x0000 }, /* R4 - Volume Control */
55 { 5, 0x000A }, /* R5 - Format Control */
56 { 6, 0x0000 }, /* R6 - Filter Control */
57 { 7, 0x0000 }, /* R7 - Mode Control 1 */
58 { 8, 0x0002 }, /* R8 - Mode Control 2 */
59 { 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */
62 static int wm8741_reset(struct snd_soc_component *component)
64 return snd_soc_component_write(component, WM8741_RESET, 0);
67 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
68 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
70 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
71 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
72 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
73 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
74 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
77 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
78 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
79 1, 255, 1, dac_tlv_fine),
80 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
84 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
85 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
86 1, 255, 1, dac_tlv_fine),
87 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
91 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
92 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
93 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
94 SND_SOC_DAPM_OUTPUT("VOUTLP"),
95 SND_SOC_DAPM_OUTPUT("VOUTLN"),
96 SND_SOC_DAPM_OUTPUT("VOUTRP"),
97 SND_SOC_DAPM_OUTPUT("VOUTRN"),
100 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
101 { "VOUTLP", NULL, "DACL" },
102 { "VOUTLN", NULL, "DACL" },
103 { "VOUTRP", NULL, "DACR" },
104 { "VOUTRN", NULL, "DACR" },
107 static const unsigned int rates_11289[] = {
111 static const struct snd_pcm_hw_constraint_list constraints_11289 = {
112 .count = ARRAY_SIZE(rates_11289),
116 static const unsigned int rates_12288[] = {
120 static const struct snd_pcm_hw_constraint_list constraints_12288 = {
121 .count = ARRAY_SIZE(rates_12288),
125 static const unsigned int rates_16384[] = {
129 static const struct snd_pcm_hw_constraint_list constraints_16384 = {
130 .count = ARRAY_SIZE(rates_16384),
134 static const unsigned int rates_16934[] = {
138 static const struct snd_pcm_hw_constraint_list constraints_16934 = {
139 .count = ARRAY_SIZE(rates_16934),
143 static const unsigned int rates_18432[] = {
147 static const struct snd_pcm_hw_constraint_list constraints_18432 = {
148 .count = ARRAY_SIZE(rates_18432),
152 static const unsigned int rates_22579[] = {
156 static const struct snd_pcm_hw_constraint_list constraints_22579 = {
157 .count = ARRAY_SIZE(rates_22579),
161 static const unsigned int rates_24576[] = {
162 32000, 48000, 96000, 192000
165 static const struct snd_pcm_hw_constraint_list constraints_24576 = {
166 .count = ARRAY_SIZE(rates_24576),
170 static const unsigned int rates_36864[] = {
174 static const struct snd_pcm_hw_constraint_list constraints_36864 = {
175 .count = ARRAY_SIZE(rates_36864),
179 static int wm8741_startup(struct snd_pcm_substream *substream,
180 struct snd_soc_dai *dai)
182 struct snd_soc_component *component = dai->component;
183 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
186 snd_pcm_hw_constraint_list(substream->runtime, 0,
187 SNDRV_PCM_HW_PARAM_RATE,
188 wm8741->sysclk_constraints);
193 static int wm8741_hw_params(struct snd_pcm_substream *substream,
194 struct snd_pcm_hw_params *params,
195 struct snd_soc_dai *dai)
197 struct snd_soc_component *component = dai->component;
198 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
202 /* The set of sample rates that can be supported depends on the
203 * MCLK supplied to the CODEC - enforce this.
205 if (!wm8741->sysclk) {
206 dev_err(component->dev,
207 "No MCLK configured, call set_sysclk() on init or in hw_params\n");
211 /* Find a supported LRCLK rate */
212 for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
213 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
217 if (i == wm8741->sysclk_constraints->count) {
218 dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
219 params_rate(params), wm8741->sysclk);
224 switch (params_width(params)) {
238 dev_dbg(component->dev, "wm8741_hw_params: Unsupported bit size param = %d",
239 params_width(params));
243 dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d",
244 params_width(params), params_rate(params));
246 snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
252 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
253 int clk_id, unsigned int freq, int dir)
255 struct snd_soc_component *component = codec_dai->component;
256 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
258 dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
262 wm8741->sysclk_constraints = NULL;
265 wm8741->sysclk_constraints = &constraints_11289;
268 wm8741->sysclk_constraints = &constraints_12288;
271 wm8741->sysclk_constraints = &constraints_16384;
274 wm8741->sysclk_constraints = &constraints_16934;
277 wm8741->sysclk_constraints = &constraints_18432;
281 wm8741->sysclk_constraints = &constraints_22579;
284 wm8741->sysclk_constraints = &constraints_24576;
287 wm8741->sysclk_constraints = &constraints_36864;
293 wm8741->sysclk = freq;
297 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
300 struct snd_soc_component *component = codec_dai->component;
303 /* check master/slave audio interface */
304 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
305 case SND_SOC_DAIFMT_CBS_CFS:
311 /* interface format */
312 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
313 case SND_SOC_DAIFMT_I2S:
316 case SND_SOC_DAIFMT_RIGHT_J:
319 case SND_SOC_DAIFMT_LEFT_J:
322 case SND_SOC_DAIFMT_DSP_A:
325 case SND_SOC_DAIFMT_DSP_B:
332 /* clock inversion */
333 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
334 case SND_SOC_DAIFMT_NB_NF:
336 case SND_SOC_DAIFMT_NB_IF:
339 case SND_SOC_DAIFMT_IB_NF:
342 case SND_SOC_DAIFMT_IB_IF:
350 dev_dbg(component->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
351 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
352 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
354 snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
355 WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
361 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
362 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
363 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
364 SNDRV_PCM_RATE_192000)
366 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
367 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
369 static const struct snd_soc_dai_ops wm8741_dai_ops = {
370 .startup = wm8741_startup,
371 .hw_params = wm8741_hw_params,
372 .set_sysclk = wm8741_set_dai_sysclk,
373 .set_fmt = wm8741_set_dai_fmt,
376 static struct snd_soc_dai_driver wm8741_dai = {
379 .stream_name = "Playback",
382 .rates = WM8741_RATES,
383 .formats = WM8741_FORMATS,
385 .ops = &wm8741_dai_ops,
389 static int wm8741_resume(struct snd_soc_component *component)
391 snd_soc_component_cache_sync(component);
395 #define wm8741_resume NULL
398 static int wm8741_configure(struct snd_soc_component *component)
400 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
402 /* Configure differential mode */
403 switch (wm8741->pdata.diff_mode) {
404 case WM8741_DIFF_MODE_STEREO:
405 case WM8741_DIFF_MODE_STEREO_REVERSED:
406 case WM8741_DIFF_MODE_MONO_LEFT:
407 case WM8741_DIFF_MODE_MONO_RIGHT:
408 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
410 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
416 /* Change some default settings - latch VU */
417 snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
418 WM8741_UPDATELL, WM8741_UPDATELL);
419 snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
420 WM8741_UPDATELM, WM8741_UPDATELM);
421 snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
422 WM8741_UPDATERL, WM8741_UPDATERL);
423 snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
424 WM8741_UPDATERM, WM8741_UPDATERM);
429 static int wm8741_add_controls(struct snd_soc_component *component)
431 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
433 switch (wm8741->pdata.diff_mode) {
434 case WM8741_DIFF_MODE_STEREO:
435 case WM8741_DIFF_MODE_STEREO_REVERSED:
436 snd_soc_add_component_controls(component,
437 wm8741_snd_controls_stereo,
438 ARRAY_SIZE(wm8741_snd_controls_stereo));
440 case WM8741_DIFF_MODE_MONO_LEFT:
441 snd_soc_add_component_controls(component,
442 wm8741_snd_controls_mono_left,
443 ARRAY_SIZE(wm8741_snd_controls_mono_left));
445 case WM8741_DIFF_MODE_MONO_RIGHT:
446 snd_soc_add_component_controls(component,
447 wm8741_snd_controls_mono_right,
448 ARRAY_SIZE(wm8741_snd_controls_mono_right));
457 static int wm8741_probe(struct snd_soc_component *component)
459 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
462 ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
465 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
469 ret = wm8741_reset(component);
471 dev_err(component->dev, "Failed to issue reset\n");
475 ret = wm8741_configure(component);
477 dev_err(component->dev, "Failed to change default settings\n");
481 ret = wm8741_add_controls(component);
483 dev_err(component->dev, "Failed to add controls\n");
487 dev_dbg(component->dev, "Successful registration\n");
491 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
496 static void wm8741_remove(struct snd_soc_component *component)
498 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
500 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
503 static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
504 .probe = wm8741_probe,
505 .remove = wm8741_remove,
506 .resume = wm8741_resume,
507 .dapm_widgets = wm8741_dapm_widgets,
508 .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
509 .dapm_routes = wm8741_dapm_routes,
510 .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
512 .use_pmdown_time = 1,
514 .non_legacy_dai_naming = 1,
517 static const struct of_device_id wm8741_of_match[] = {
518 { .compatible = "wlf,wm8741", },
521 MODULE_DEVICE_TABLE(of, wm8741_of_match);
523 static const struct regmap_config wm8741_regmap = {
526 .max_register = WM8741_MAX_REGISTER,
528 .reg_defaults = wm8741_reg_defaults,
529 .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
530 .cache_type = REGCACHE_RBTREE,
533 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
535 const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
539 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
541 wm8741->pdata.diff_mode = diff_mode;
544 memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
550 #if IS_ENABLED(CONFIG_I2C)
551 static int wm8741_i2c_probe(struct i2c_client *i2c,
552 const struct i2c_device_id *id)
554 struct wm8741_priv *wm8741;
557 wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
562 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
563 wm8741->supplies[i].supply = wm8741_supply_names[i];
565 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
568 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
572 wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
573 if (IS_ERR(wm8741->regmap)) {
574 ret = PTR_ERR(wm8741->regmap);
575 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
579 ret = wm8741_set_pdata(&i2c->dev, wm8741);
581 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
585 i2c_set_clientdata(i2c, wm8741);
587 ret = devm_snd_soc_register_component(&i2c->dev,
588 &soc_component_dev_wm8741, &wm8741_dai, 1);
593 static const struct i2c_device_id wm8741_i2c_id[] = {
597 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
599 static struct i2c_driver wm8741_i2c_driver = {
602 .of_match_table = wm8741_of_match,
604 .probe = wm8741_i2c_probe,
605 .id_table = wm8741_i2c_id,
609 #if defined(CONFIG_SPI_MASTER)
610 static int wm8741_spi_probe(struct spi_device *spi)
612 struct wm8741_priv *wm8741;
615 wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
620 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
621 wm8741->supplies[i].supply = wm8741_supply_names[i];
623 ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
626 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
630 wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
631 if (IS_ERR(wm8741->regmap)) {
632 ret = PTR_ERR(wm8741->regmap);
633 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
637 ret = wm8741_set_pdata(&spi->dev, wm8741);
639 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
643 spi_set_drvdata(spi, wm8741);
645 ret = devm_snd_soc_register_component(&spi->dev,
646 &soc_component_dev_wm8741, &wm8741_dai, 1);
650 static struct spi_driver wm8741_spi_driver = {
653 .of_match_table = wm8741_of_match,
655 .probe = wm8741_spi_probe,
657 #endif /* CONFIG_SPI_MASTER */
659 static int __init wm8741_modinit(void)
663 #if IS_ENABLED(CONFIG_I2C)
664 ret = i2c_add_driver(&wm8741_i2c_driver);
666 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
668 #if defined(CONFIG_SPI_MASTER)
669 ret = spi_register_driver(&wm8741_spi_driver);
671 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
678 module_init(wm8741_modinit);
680 static void __exit wm8741_exit(void)
682 #if defined(CONFIG_SPI_MASTER)
683 spi_unregister_driver(&wm8741_spi_driver);
685 #if IS_ENABLED(CONFIG_I2C)
686 i2c_del_driver(&wm8741_i2c_driver);
689 module_exit(wm8741_exit);
691 MODULE_DESCRIPTION("ASoC WM8741 driver");
692 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
693 MODULE_LICENSE("GPL");