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71cfc902 MB |
1 | /* |
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> | |
d16383ef | 20 | #include <linux/regmap.h> |
71cfc902 | 21 | #include <linux/spi/spi.h> |
5a0e3ad6 | 22 | #include <linux/slab.h> |
45b4d043 | 23 | #include <linux/of_device.h> |
71cfc902 MB |
24 | #include <sound/core.h> |
25 | #include <sound/pcm.h> | |
26 | #include <sound/pcm_params.h> | |
27 | #include <sound/soc.h> | |
71cfc902 MB |
28 | #include <sound/initval.h> |
29 | #include <sound/tlv.h> | |
30 | ||
31 | #include "wm8728.h" | |
32 | ||
71cfc902 MB |
33 | /* |
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 | */ | |
d16383ef MB |
39 | static const struct reg_default wm8728_reg_defaults[] = { |
40 | { 0, 0x1ff }, | |
41 | { 1, 0x1ff }, | |
42 | { 2, 0x001 }, | |
43 | { 3, 0x100 }, | |
71cfc902 MB |
44 | }; |
45 | ||
f0fba2ad LG |
46 | /* codec private data */ |
47 | struct wm8728_priv { | |
d16383ef | 48 | struct regmap *regmap; |
f0fba2ad LG |
49 | }; |
50 | ||
71cfc902 MB |
51 | static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); |
52 | ||
53 | static const struct snd_kcontrol_new wm8728_snd_controls[] = { | |
54 | ||
55 | SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, | |
56 | 0, 255, 0, wm8728_tlv), | |
57 | ||
58 | SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), | |
59 | }; | |
60 | ||
71cfc902 MB |
61 | /* |
62 | * DAPM controls. | |
63 | */ | |
64 | static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { | |
65 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), | |
66 | SND_SOC_DAPM_OUTPUT("VOUTL"), | |
67 | SND_SOC_DAPM_OUTPUT("VOUTR"), | |
68 | }; | |
69 | ||
8428edf9 | 70 | static const struct snd_soc_dapm_route wm8728_intercon[] = { |
71cfc902 MB |
71 | {"VOUTL", NULL, "DAC"}, |
72 | {"VOUTR", NULL, "DAC"}, | |
73 | }; | |
74 | ||
71cfc902 MB |
75 | static int wm8728_mute(struct snd_soc_dai *dai, int mute) |
76 | { | |
77 | struct snd_soc_codec *codec = dai->codec; | |
17a52fd6 | 78 | u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
79 | |
80 | if (mute) | |
17a52fd6 | 81 | snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); |
71cfc902 | 82 | else |
17a52fd6 | 83 | snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); |
71cfc902 MB |
84 | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static int wm8728_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
89 | struct snd_pcm_hw_params *params, |
90 | struct snd_soc_dai *dai) | |
71cfc902 | 91 | { |
e6968a17 | 92 | struct snd_soc_codec *codec = dai->codec; |
17a52fd6 | 93 | u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
94 | |
95 | dac &= ~0x18; | |
96 | ||
9fbad31a MB |
97 | switch (params_width(params)) { |
98 | case 16: | |
71cfc902 | 99 | break; |
9fbad31a | 100 | case 20: |
71cfc902 MB |
101 | dac |= 0x10; |
102 | break; | |
9fbad31a | 103 | case 24: |
71cfc902 MB |
104 | dac |= 0x08; |
105 | break; | |
106 | default: | |
107 | return -EINVAL; | |
108 | } | |
109 | ||
17a52fd6 | 110 | snd_soc_write(codec, WM8728_DACCTL, dac); |
71cfc902 MB |
111 | |
112 | return 0; | |
113 | } | |
114 | ||
115 | static 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; | |
17a52fd6 | 119 | u16 iface = snd_soc_read(codec, WM8728_IFCTL); |
71cfc902 MB |
120 | |
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 | ||
17a52fd6 | 159 | snd_soc_write(codec, WM8728_IFCTL, iface); |
71cfc902 MB |
160 | return 0; |
161 | } | |
162 | ||
163 | static int wm8728_set_bias_level(struct snd_soc_codec *codec, | |
164 | enum snd_soc_bias_level level) | |
165 | { | |
d16383ef | 166 | struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec); |
71cfc902 | 167 | u16 reg; |
71cfc902 MB |
168 | |
169 | switch (level) { | |
170 | case SND_SOC_BIAS_ON: | |
171 | case SND_SOC_BIAS_PREPARE: | |
172 | case SND_SOC_BIAS_STANDBY: | |
5e80bb92 | 173 | if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) { |
71cfc902 | 174 | /* Power everything up... */ |
17a52fd6 MB |
175 | reg = snd_soc_read(codec, WM8728_DACCTL); |
176 | snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); | |
71cfc902 MB |
177 | |
178 | /* ..then sync in the register cache. */ | |
d16383ef | 179 | regcache_sync(wm8728->regmap); |
71cfc902 MB |
180 | } |
181 | break; | |
182 | ||
183 | case SND_SOC_BIAS_OFF: | |
17a52fd6 MB |
184 | reg = snd_soc_read(codec, WM8728_DACCTL); |
185 | snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); | |
71cfc902 MB |
186 | break; |
187 | } | |
71cfc902 MB |
188 | 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 | ||
85e7652d | 196 | static const struct snd_soc_dai_ops wm8728_dai_ops = { |
6335d055 EM |
197 | .hw_params = wm8728_hw_params, |
198 | .digital_mute = wm8728_mute, | |
199 | .set_fmt = wm8728_set_dai_fmt, | |
200 | }; | |
201 | ||
f0fba2ad LG |
202 | static struct snd_soc_dai_driver wm8728_dai = { |
203 | .name = "wm8728-hifi", | |
71cfc902 MB |
204 | .playback = { |
205 | .stream_name = "Playback", | |
206 | .channels_min = 2, | |
207 | .channels_max = 2, | |
208 | .rates = WM8728_RATES, | |
209 | .formats = WM8728_FORMATS, | |
210 | }, | |
6335d055 | 211 | .ops = &wm8728_dai_ops, |
71cfc902 | 212 | }; |
71cfc902 | 213 | |
f0fba2ad | 214 | static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { |
f0fba2ad | 215 | .set_bias_level = wm8728_set_bias_level, |
d4d41436 LPC |
216 | .suspend_bias_off = true, |
217 | ||
e41d5a3b MB |
218 | .controls = wm8728_snd_controls, |
219 | .num_controls = ARRAY_SIZE(wm8728_snd_controls), | |
8428edf9 LG |
220 | .dapm_widgets = wm8728_dapm_widgets, |
221 | .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), | |
222 | .dapm_routes = wm8728_intercon, | |
223 | .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), | |
71cfc902 MB |
224 | }; |
225 | ||
45b4d043 MB |
226 | static const struct of_device_id wm8728_of_match[] = { |
227 | { .compatible = "wlf,wm8728", }, | |
228 | { } | |
229 | }; | |
230 | MODULE_DEVICE_TABLE(of, wm8728_of_match); | |
231 | ||
d16383ef MB |
232 | static const struct regmap_config wm8728_regmap = { |
233 | .reg_bits = 7, | |
234 | .val_bits = 9, | |
235 | .max_register = WM8728_IFCTL, | |
236 | ||
237 | .reg_defaults = wm8728_reg_defaults, | |
238 | .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), | |
239 | .cache_type = REGCACHE_RBTREE, | |
240 | }; | |
241 | ||
71cfc902 | 242 | #if defined(CONFIG_SPI_MASTER) |
7a79e94e | 243 | static int wm8728_spi_probe(struct spi_device *spi) |
71cfc902 | 244 | { |
f0fba2ad | 245 | struct wm8728_priv *wm8728; |
71cfc902 MB |
246 | int ret; |
247 | ||
1a9585b0 MB |
248 | wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), |
249 | GFP_KERNEL); | |
f0fba2ad LG |
250 | if (wm8728 == NULL) |
251 | return -ENOMEM; | |
71cfc902 | 252 | |
d16383ef MB |
253 | wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); |
254 | if (IS_ERR(wm8728->regmap)) | |
255 | return PTR_ERR(wm8728->regmap); | |
256 | ||
f0fba2ad | 257 | spi_set_drvdata(spi, wm8728); |
71cfc902 | 258 | |
f0fba2ad LG |
259 | ret = snd_soc_register_codec(&spi->dev, |
260 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
1a9585b0 | 261 | |
71cfc902 MB |
262 | return ret; |
263 | } | |
264 | ||
7a79e94e | 265 | static int wm8728_spi_remove(struct spi_device *spi) |
71cfc902 | 266 | { |
f0fba2ad | 267 | snd_soc_unregister_codec(&spi->dev); |
1a9585b0 | 268 | |
71cfc902 MB |
269 | return 0; |
270 | } | |
271 | ||
272 | static struct spi_driver wm8728_spi_driver = { | |
273 | .driver = { | |
0473e61b | 274 | .name = "wm8728", |
45b4d043 | 275 | .of_match_table = wm8728_of_match, |
71cfc902 MB |
276 | }, |
277 | .probe = wm8728_spi_probe, | |
7a79e94e | 278 | .remove = wm8728_spi_remove, |
71cfc902 | 279 | }; |
71cfc902 MB |
280 | #endif /* CONFIG_SPI_MASTER */ |
281 | ||
5c153716 | 282 | #if IS_ENABLED(CONFIG_I2C) |
7a79e94e BP |
283 | static int wm8728_i2c_probe(struct i2c_client *i2c, |
284 | const struct i2c_device_id *id) | |
71cfc902 | 285 | { |
f0fba2ad LG |
286 | struct wm8728_priv *wm8728; |
287 | int ret; | |
71cfc902 | 288 | |
1a9585b0 MB |
289 | wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), |
290 | GFP_KERNEL); | |
f0fba2ad | 291 | if (wm8728 == NULL) |
71cfc902 MB |
292 | return -ENOMEM; |
293 | ||
d16383ef MB |
294 | wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); |
295 | if (IS_ERR(wm8728->regmap)) | |
296 | return PTR_ERR(wm8728->regmap); | |
297 | ||
f0fba2ad | 298 | i2c_set_clientdata(i2c, wm8728); |
f0fba2ad LG |
299 | |
300 | ret = snd_soc_register_codec(&i2c->dev, | |
301 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
1a9585b0 | 302 | |
f0fba2ad LG |
303 | return ret; |
304 | } | |
305 | ||
7a79e94e | 306 | static int wm8728_i2c_remove(struct i2c_client *client) |
f0fba2ad LG |
307 | { |
308 | snd_soc_unregister_codec(&client->dev); | |
f0fba2ad LG |
309 | return 0; |
310 | } | |
71cfc902 | 311 | |
f0fba2ad LG |
312 | static const struct i2c_device_id wm8728_i2c_id[] = { |
313 | { "wm8728", 0 }, | |
314 | { } | |
315 | }; | |
316 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
317 | ||
318 | static struct i2c_driver wm8728_i2c_driver = { | |
319 | .driver = { | |
0473e61b | 320 | .name = "wm8728", |
45b4d043 | 321 | .of_match_table = wm8728_of_match, |
f0fba2ad LG |
322 | }, |
323 | .probe = wm8728_i2c_probe, | |
7a79e94e | 324 | .remove = wm8728_i2c_remove, |
f0fba2ad LG |
325 | .id_table = wm8728_i2c_id, |
326 | }; | |
327 | #endif | |
71cfc902 | 328 | |
f0fba2ad LG |
329 | static int __init wm8728_modinit(void) |
330 | { | |
331 | int ret = 0; | |
5c153716 | 332 | #if IS_ENABLED(CONFIG_I2C) |
f0fba2ad LG |
333 | ret = i2c_add_driver(&wm8728_i2c_driver); |
334 | if (ret != 0) { | |
335 | printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", | |
336 | ret); | |
71cfc902 MB |
337 | } |
338 | #endif | |
339 | #if defined(CONFIG_SPI_MASTER) | |
f0fba2ad LG |
340 | ret = spi_register_driver(&wm8728_spi_driver); |
341 | if (ret != 0) { | |
342 | printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", | |
343 | ret); | |
71cfc902 MB |
344 | } |
345 | #endif | |
71cfc902 MB |
346 | return ret; |
347 | } | |
f0fba2ad | 348 | module_init(wm8728_modinit); |
71cfc902 | 349 | |
f0fba2ad | 350 | static void __exit wm8728_exit(void) |
71cfc902 | 351 | { |
5c153716 | 352 | #if IS_ENABLED(CONFIG_I2C) |
71cfc902 MB |
353 | i2c_del_driver(&wm8728_i2c_driver); |
354 | #endif | |
355 | #if defined(CONFIG_SPI_MASTER) | |
356 | spi_unregister_driver(&wm8728_spi_driver); | |
357 | #endif | |
64089b84 MB |
358 | } |
359 | module_exit(wm8728_exit); | |
360 | ||
71cfc902 MB |
361 | MODULE_DESCRIPTION("ASoC WM8728 driver"); |
362 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
363 | MODULE_LICENSE("GPL"); |