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Mark Brown71cfc902008-11-13 14:33:14 +00001/*
2 * wm8728.c -- WM8728 ALSA SoC Audio driver
3 *
4 * Copyright 2008 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
13#include <linux/module.h>
14#include <linux/moduleparam.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/pm.h>
18#include <linux/i2c.h>
19#include <linux/platform_device.h>
Mark Brownd16383e2012-09-12 12:30:01 +080020#include <linux/regmap.h>
Mark Brown71cfc902008-11-13 14:33:14 +000021#include <linux/spi/spi.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090022#include <linux/slab.h>
Mark Brown45b4d042011-08-03 16:53:02 +090023#include <linux/of_device.h>
Mark Brown71cfc902008-11-13 14:33:14 +000024#include <sound/core.h>
25#include <sound/pcm.h>
26#include <sound/pcm_params.h>
27#include <sound/soc.h>
Mark Brown71cfc902008-11-13 14:33:14 +000028#include <sound/initval.h>
29#include <sound/tlv.h>
30
31#include "wm8728.h"
32
Mark Brown71cfc902008-11-13 14:33:14 +000033/*
34 * We can't read the WM8728 register space so we cache them instead.
35 * Note that the defaults here aren't the physical defaults, we latch
36 * the volume update bits, mute the output and enable infinite zero
37 * detect.
38 */
Mark Brownd16383e2012-09-12 12:30:01 +080039static const struct reg_default wm8728_reg_defaults[] = {
40 { 0, 0x1ff },
41 { 1, 0x1ff },
42 { 2, 0x001 },
43 { 3, 0x100 },
Mark Brown71cfc902008-11-13 14:33:14 +000044};
45
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000046/* codec private data */
47struct wm8728_priv {
Mark Brownd16383e2012-09-12 12:30:01 +080048 struct regmap *regmap;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +000049};
50
Mark Brown71cfc902008-11-13 14:33:14 +000051static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1);
52
53static const struct snd_kcontrol_new wm8728_snd_controls[] = {
54
55SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL,
56 0, 255, 0, wm8728_tlv),
57
58SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0),
59};
60
Mark Brown71cfc902008-11-13 14:33:14 +000061/*
62 * DAPM controls.
63 */
64static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = {
65SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0),
66SND_SOC_DAPM_OUTPUT("VOUTL"),
67SND_SOC_DAPM_OUTPUT("VOUTR"),
68};
69
Lu Guanqun8428edf2011-03-30 21:53:14 +080070static const struct snd_soc_dapm_route wm8728_intercon[] = {
Mark Brown71cfc902008-11-13 14:33:14 +000071 {"VOUTL", NULL, "DAC"},
72 {"VOUTR", NULL, "DAC"},
73};
74
Mark Brown71cfc902008-11-13 14:33:14 +000075static int wm8728_mute(struct snd_soc_dai *dai, int mute)
76{
77 struct snd_soc_codec *codec = dai->codec;
Mark Brown17a52fd2009-07-05 17:24:50 +010078 u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
Mark Brown71cfc902008-11-13 14:33:14 +000079
80 if (mute)
Mark Brown17a52fd2009-07-05 17:24:50 +010081 snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
Mark Brown71cfc902008-11-13 14:33:14 +000082 else
Mark Brown17a52fd2009-07-05 17:24:50 +010083 snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1);
Mark Brown71cfc902008-11-13 14:33:14 +000084
85 return 0;
86}
87
88static int wm8728_hw_params(struct snd_pcm_substream *substream,
Mark Browndee89c42008-11-18 22:11:38 +000089 struct snd_pcm_hw_params *params,
90 struct snd_soc_dai *dai)
Mark Brown71cfc902008-11-13 14:33:14 +000091{
Mark Browne6968a12012-04-04 15:58:16 +010092 struct snd_soc_codec *codec = dai->codec;
Mark Brown17a52fd2009-07-05 17:24:50 +010093 u16 dac = snd_soc_read(codec, WM8728_DACCTL);
Mark Brown71cfc902008-11-13 14:33:14 +000094
95 dac &= ~0x18;
96
Mark Brown9fbad312014-07-31 12:51:26 +010097 switch (params_width(params)) {
98 case 16:
Mark Brown71cfc902008-11-13 14:33:14 +000099 break;
Mark Brown9fbad312014-07-31 12:51:26 +0100100 case 20:
Mark Brown71cfc902008-11-13 14:33:14 +0000101 dac |= 0x10;
102 break;
Mark Brown9fbad312014-07-31 12:51:26 +0100103 case 24:
Mark Brown71cfc902008-11-13 14:33:14 +0000104 dac |= 0x08;
105 break;
106 default:
107 return -EINVAL;
108 }
109
Mark Brown17a52fd2009-07-05 17:24:50 +0100110 snd_soc_write(codec, WM8728_DACCTL, dac);
Mark Brown71cfc902008-11-13 14:33:14 +0000111
112 return 0;
113}
114
115static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai,
116 unsigned int fmt)
117{
118 struct snd_soc_codec *codec = codec_dai->codec;
Mark Brown17a52fd2009-07-05 17:24:50 +0100119 u16 iface = snd_soc_read(codec, WM8728_IFCTL);
Mark Brown71cfc902008-11-13 14:33:14 +0000120
121 /* Currently only I2S is supported by the driver, though the
122 * hardware is more flexible.
123 */
124 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
125 case SND_SOC_DAIFMT_I2S:
126 iface |= 1;
127 break;
128 default:
129 return -EINVAL;
130 }
131
132 /* The hardware only support full slave mode */
133 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
134 case SND_SOC_DAIFMT_CBS_CFS:
135 break;
136 default:
137 return -EINVAL;
138 }
139
140 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
141 case SND_SOC_DAIFMT_NB_NF:
142 iface &= ~0x22;
143 break;
144 case SND_SOC_DAIFMT_IB_NF:
145 iface |= 0x20;
146 iface &= ~0x02;
147 break;
148 case SND_SOC_DAIFMT_NB_IF:
149 iface |= 0x02;
150 iface &= ~0x20;
151 break;
152 case SND_SOC_DAIFMT_IB_IF:
153 iface |= 0x22;
154 break;
155 default:
156 return -EINVAL;
157 }
158
Mark Brown17a52fd2009-07-05 17:24:50 +0100159 snd_soc_write(codec, WM8728_IFCTL, iface);
Mark Brown71cfc902008-11-13 14:33:14 +0000160 return 0;
161}
162
163static int wm8728_set_bias_level(struct snd_soc_codec *codec,
164 enum snd_soc_bias_level level)
165{
Mark Brownd16383e2012-09-12 12:30:01 +0800166 struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec);
Mark Brown71cfc902008-11-13 14:33:14 +0000167 u16 reg;
Mark Brown71cfc902008-11-13 14:33:14 +0000168
169 switch (level) {
170 case SND_SOC_BIAS_ON:
171 case SND_SOC_BIAS_PREPARE:
172 case SND_SOC_BIAS_STANDBY:
Lars-Peter Clausen5e80bb92015-06-01 10:10:35 +0200173 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
Mark Brown71cfc902008-11-13 14:33:14 +0000174 /* Power everything up... */
Mark Brown17a52fd2009-07-05 17:24:50 +0100175 reg = snd_soc_read(codec, WM8728_DACCTL);
176 snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
Mark Brown71cfc902008-11-13 14:33:14 +0000177
178 /* ..then sync in the register cache. */
Mark Brownd16383e2012-09-12 12:30:01 +0800179 regcache_sync(wm8728->regmap);
Mark Brown71cfc902008-11-13 14:33:14 +0000180 }
181 break;
182
183 case SND_SOC_BIAS_OFF:
Mark Brown17a52fd2009-07-05 17:24:50 +0100184 reg = snd_soc_read(codec, WM8728_DACCTL);
185 snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
Mark Brown71cfc902008-11-13 14:33:14 +0000186 break;
187 }
Mark Brown71cfc902008-11-13 14:33:14 +0000188 return 0;
189}
190
191#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000)
192
193#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
194 SNDRV_PCM_FMTBIT_S24_LE)
195
Lars-Peter Clausen85e76522011-11-23 11:40:40 +0100196static const struct snd_soc_dai_ops wm8728_dai_ops = {
Eric Miao6335d052009-03-03 09:41:00 +0800197 .hw_params = wm8728_hw_params,
198 .digital_mute = wm8728_mute,
199 .set_fmt = wm8728_set_dai_fmt,
200};
201
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000202static struct snd_soc_dai_driver wm8728_dai = {
203 .name = "wm8728-hifi",
Mark Brown71cfc902008-11-13 14:33:14 +0000204 .playback = {
205 .stream_name = "Playback",
206 .channels_min = 2,
207 .channels_max = 2,
208 .rates = WM8728_RATES,
209 .formats = WM8728_FORMATS,
210 },
Eric Miao6335d052009-03-03 09:41:00 +0800211 .ops = &wm8728_dai_ops,
Mark Brown71cfc902008-11-13 14:33:14 +0000212};
Mark Brown71cfc902008-11-13 14:33:14 +0000213
Julia Lawallf802d6c2016-08-31 23:52:27 +0200214static const struct snd_soc_codec_driver soc_codec_dev_wm8728 = {
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000215 .set_bias_level = wm8728_set_bias_level,
Lars-Peter Clausend4d41432014-11-23 13:37:23 +0100216 .suspend_bias_off = true,
217
Kuninori Morimoto298e17b2016-08-08 08:51:16 +0000218 .component_driver = {
219 .controls = wm8728_snd_controls,
220 .num_controls = ARRAY_SIZE(wm8728_snd_controls),
221 .dapm_widgets = wm8728_dapm_widgets,
222 .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets),
223 .dapm_routes = wm8728_intercon,
224 .num_dapm_routes = ARRAY_SIZE(wm8728_intercon),
225 },
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000226};
227
Mark Brown45b4d042011-08-03 16:53:02 +0900228static const struct of_device_id wm8728_of_match[] = {
229 { .compatible = "wlf,wm8728", },
230 { }
231};
232MODULE_DEVICE_TABLE(of, wm8728_of_match);
233
Mark Brownd16383e2012-09-12 12:30:01 +0800234static const struct regmap_config wm8728_regmap = {
235 .reg_bits = 7,
236 .val_bits = 9,
237 .max_register = WM8728_IFCTL,
238
239 .reg_defaults = wm8728_reg_defaults,
240 .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults),
241 .cache_type = REGCACHE_RBTREE,
242};
243
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000244#if defined(CONFIG_SPI_MASTER)
Bill Pemberton7a79e942012-12-07 09:26:37 -0500245static int wm8728_spi_probe(struct spi_device *spi)
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000246{
247 struct wm8728_priv *wm8728;
Mark Brown71cfc902008-11-13 14:33:14 +0000248 int ret;
249
Mark Brown1a9585b2012-09-12 09:26:25 +0800250 wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv),
251 GFP_KERNEL);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000252 if (wm8728 == NULL)
253 return -ENOMEM;
Mark Brown71cfc902008-11-13 14:33:14 +0000254
Mark Brownd16383e2012-09-12 12:30:01 +0800255 wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap);
256 if (IS_ERR(wm8728->regmap))
257 return PTR_ERR(wm8728->regmap);
258
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000259 spi_set_drvdata(spi, wm8728);
260
261 ret = snd_soc_register_codec(&spi->dev,
262 &soc_codec_dev_wm8728, &wm8728_dai, 1);
Mark Brown1a9585b2012-09-12 09:26:25 +0800263
Mark Brown71cfc902008-11-13 14:33:14 +0000264 return ret;
265}
266
Bill Pemberton7a79e942012-12-07 09:26:37 -0500267static int wm8728_spi_remove(struct spi_device *spi)
Mark Brown71cfc902008-11-13 14:33:14 +0000268{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000269 snd_soc_unregister_codec(&spi->dev);
Mark Brown1a9585b2012-09-12 09:26:25 +0800270
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000271 return 0;
272}
273
274static struct spi_driver wm8728_spi_driver = {
275 .driver = {
Mark Brown0473e612011-08-03 16:52:10 +0900276 .name = "wm8728",
Mark Brown45b4d042011-08-03 16:53:02 +0900277 .of_match_table = wm8728_of_match,
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000278 },
279 .probe = wm8728_spi_probe,
Bill Pemberton7a79e942012-12-07 09:26:37 -0500280 .remove = wm8728_spi_remove,
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000281};
282#endif /* CONFIG_SPI_MASTER */
283
Fabio Estevam5c153712013-11-20 15:37:47 -0200284#if IS_ENABLED(CONFIG_I2C)
Bill Pemberton7a79e942012-12-07 09:26:37 -0500285static int wm8728_i2c_probe(struct i2c_client *i2c,
286 const struct i2c_device_id *id)
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000287{
288 struct wm8728_priv *wm8728;
289 int ret;
290
Mark Brown1a9585b2012-09-12 09:26:25 +0800291 wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv),
292 GFP_KERNEL);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000293 if (wm8728 == NULL)
294 return -ENOMEM;
295
Mark Brownd16383e2012-09-12 12:30:01 +0800296 wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap);
297 if (IS_ERR(wm8728->regmap))
298 return PTR_ERR(wm8728->regmap);
299
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000300 i2c_set_clientdata(i2c, wm8728);
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000301
302 ret = snd_soc_register_codec(&i2c->dev,
303 &soc_codec_dev_wm8728, &wm8728_dai, 1);
Mark Brown1a9585b2012-09-12 09:26:25 +0800304
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000305 return ret;
306}
307
Bill Pemberton7a79e942012-12-07 09:26:37 -0500308static int wm8728_i2c_remove(struct i2c_client *client)
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000309{
310 snd_soc_unregister_codec(&client->dev);
Mark Brown71cfc902008-11-13 14:33:14 +0000311 return 0;
312}
313
314static const struct i2c_device_id wm8728_i2c_id[] = {
315 { "wm8728", 0 },
316 { }
317};
318MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id);
319
320static struct i2c_driver wm8728_i2c_driver = {
321 .driver = {
Mark Brown0473e612011-08-03 16:52:10 +0900322 .name = "wm8728",
Mark Brown45b4d042011-08-03 16:53:02 +0900323 .of_match_table = wm8728_of_match,
Mark Brown71cfc902008-11-13 14:33:14 +0000324 },
325 .probe = wm8728_i2c_probe,
Bill Pemberton7a79e942012-12-07 09:26:37 -0500326 .remove = wm8728_i2c_remove,
Mark Brown71cfc902008-11-13 14:33:14 +0000327 .id_table = wm8728_i2c_id,
328};
Mark Brown71cfc902008-11-13 14:33:14 +0000329#endif
330
Takashi Iwaic9b3a402008-12-10 07:47:22 +0100331static int __init wm8728_modinit(void)
Mark Brown64089b82008-12-08 19:17:58 +0000332{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000333 int ret = 0;
Fabio Estevam5c153712013-11-20 15:37:47 -0200334#if IS_ENABLED(CONFIG_I2C)
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000335 ret = i2c_add_driver(&wm8728_i2c_driver);
336 if (ret != 0) {
337 printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n",
338 ret);
339 }
340#endif
341#if defined(CONFIG_SPI_MASTER)
342 ret = spi_register_driver(&wm8728_spi_driver);
343 if (ret != 0) {
344 printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n",
345 ret);
346 }
347#endif
348 return ret;
Mark Brown64089b82008-12-08 19:17:58 +0000349}
350module_init(wm8728_modinit);
351
352static void __exit wm8728_exit(void)
353{
Fabio Estevam5c153712013-11-20 15:37:47 -0200354#if IS_ENABLED(CONFIG_I2C)
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000355 i2c_del_driver(&wm8728_i2c_driver);
356#endif
357#if defined(CONFIG_SPI_MASTER)
358 spi_unregister_driver(&wm8728_spi_driver);
359#endif
Mark Brown64089b82008-12-08 19:17:58 +0000360}
361module_exit(wm8728_exit);
362
Mark Brown71cfc902008-11-13 14:33:14 +0000363MODULE_DESCRIPTION("ASoC WM8728 driver");
364MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
365MODULE_LICENSE("GPL");