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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 | ||
97 | switch (params_format(params)) { | |
98 | case SNDRV_PCM_FORMAT_S16_LE: | |
99 | break; | |
100 | case SNDRV_PCM_FORMAT_S20_3LE: | |
101 | dac |= 0x10; | |
102 | break; | |
103 | case SNDRV_PCM_FORMAT_S24_LE: | |
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: | |
ce6120cc | 173 | if (codec->dapm.bias_level == 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 | } | |
ce6120cc | 188 | codec->dapm.bias_level = level; |
71cfc902 MB |
189 | return 0; |
190 | } | |
191 | ||
192 | #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) | |
193 | ||
194 | #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
195 | SNDRV_PCM_FMTBIT_S24_LE) | |
196 | ||
85e7652d | 197 | static const struct snd_soc_dai_ops wm8728_dai_ops = { |
6335d055 EM |
198 | .hw_params = wm8728_hw_params, |
199 | .digital_mute = wm8728_mute, | |
200 | .set_fmt = wm8728_set_dai_fmt, | |
201 | }; | |
202 | ||
f0fba2ad LG |
203 | static struct snd_soc_dai_driver wm8728_dai = { |
204 | .name = "wm8728-hifi", | |
71cfc902 MB |
205 | .playback = { |
206 | .stream_name = "Playback", | |
207 | .channels_min = 2, | |
208 | .channels_max = 2, | |
209 | .rates = WM8728_RATES, | |
210 | .formats = WM8728_FORMATS, | |
211 | }, | |
6335d055 | 212 | .ops = &wm8728_dai_ops, |
71cfc902 | 213 | }; |
71cfc902 | 214 | |
84b315ee | 215 | static int wm8728_suspend(struct snd_soc_codec *codec) |
71cfc902 | 216 | { |
71cfc902 MB |
217 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
218 | ||
219 | return 0; | |
220 | } | |
221 | ||
f0fba2ad | 222 | static int wm8728_resume(struct snd_soc_codec *codec) |
71cfc902 | 223 | { |
29e189c2 | 224 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
71cfc902 MB |
225 | |
226 | return 0; | |
227 | } | |
228 | ||
f0fba2ad | 229 | static int wm8728_probe(struct snd_soc_codec *codec) |
71cfc902 | 230 | { |
71cfc902 MB |
231 | /* power on device */ |
232 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
233 | ||
5d6be5aa | 234 | return 0; |
71cfc902 MB |
235 | } |
236 | ||
f0fba2ad | 237 | static int wm8728_remove(struct snd_soc_codec *codec) |
71cfc902 | 238 | { |
f0fba2ad | 239 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
71cfc902 MB |
240 | return 0; |
241 | } | |
242 | ||
f0fba2ad LG |
243 | static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { |
244 | .probe = wm8728_probe, | |
245 | .remove = wm8728_remove, | |
246 | .suspend = wm8728_suspend, | |
247 | .resume = wm8728_resume, | |
248 | .set_bias_level = wm8728_set_bias_level, | |
e41d5a3b MB |
249 | .controls = wm8728_snd_controls, |
250 | .num_controls = ARRAY_SIZE(wm8728_snd_controls), | |
8428edf9 LG |
251 | .dapm_widgets = wm8728_dapm_widgets, |
252 | .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), | |
253 | .dapm_routes = wm8728_intercon, | |
254 | .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), | |
71cfc902 MB |
255 | }; |
256 | ||
45b4d043 MB |
257 | static const struct of_device_id wm8728_of_match[] = { |
258 | { .compatible = "wlf,wm8728", }, | |
259 | { } | |
260 | }; | |
261 | MODULE_DEVICE_TABLE(of, wm8728_of_match); | |
262 | ||
d16383ef MB |
263 | static const struct regmap_config wm8728_regmap = { |
264 | .reg_bits = 7, | |
265 | .val_bits = 9, | |
266 | .max_register = WM8728_IFCTL, | |
267 | ||
268 | .reg_defaults = wm8728_reg_defaults, | |
269 | .num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), | |
270 | .cache_type = REGCACHE_RBTREE, | |
271 | }; | |
272 | ||
71cfc902 | 273 | #if defined(CONFIG_SPI_MASTER) |
7a79e94e | 274 | static int wm8728_spi_probe(struct spi_device *spi) |
71cfc902 | 275 | { |
f0fba2ad | 276 | struct wm8728_priv *wm8728; |
71cfc902 MB |
277 | int ret; |
278 | ||
1a9585b0 MB |
279 | wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), |
280 | GFP_KERNEL); | |
f0fba2ad LG |
281 | if (wm8728 == NULL) |
282 | return -ENOMEM; | |
71cfc902 | 283 | |
d16383ef MB |
284 | wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); |
285 | if (IS_ERR(wm8728->regmap)) | |
286 | return PTR_ERR(wm8728->regmap); | |
287 | ||
f0fba2ad | 288 | spi_set_drvdata(spi, wm8728); |
71cfc902 | 289 | |
f0fba2ad LG |
290 | ret = snd_soc_register_codec(&spi->dev, |
291 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
1a9585b0 | 292 | |
71cfc902 MB |
293 | return ret; |
294 | } | |
295 | ||
7a79e94e | 296 | static int wm8728_spi_remove(struct spi_device *spi) |
71cfc902 | 297 | { |
f0fba2ad | 298 | snd_soc_unregister_codec(&spi->dev); |
1a9585b0 | 299 | |
71cfc902 MB |
300 | return 0; |
301 | } | |
302 | ||
303 | static struct spi_driver wm8728_spi_driver = { | |
304 | .driver = { | |
0473e61b | 305 | .name = "wm8728", |
71cfc902 | 306 | .owner = THIS_MODULE, |
45b4d043 | 307 | .of_match_table = wm8728_of_match, |
71cfc902 MB |
308 | }, |
309 | .probe = wm8728_spi_probe, | |
7a79e94e | 310 | .remove = wm8728_spi_remove, |
71cfc902 | 311 | }; |
71cfc902 MB |
312 | #endif /* CONFIG_SPI_MASTER */ |
313 | ||
5c153716 | 314 | #if IS_ENABLED(CONFIG_I2C) |
7a79e94e BP |
315 | static int wm8728_i2c_probe(struct i2c_client *i2c, |
316 | const struct i2c_device_id *id) | |
71cfc902 | 317 | { |
f0fba2ad LG |
318 | struct wm8728_priv *wm8728; |
319 | int ret; | |
71cfc902 | 320 | |
1a9585b0 MB |
321 | wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), |
322 | GFP_KERNEL); | |
f0fba2ad | 323 | if (wm8728 == NULL) |
71cfc902 MB |
324 | return -ENOMEM; |
325 | ||
d16383ef MB |
326 | wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); |
327 | if (IS_ERR(wm8728->regmap)) | |
328 | return PTR_ERR(wm8728->regmap); | |
329 | ||
f0fba2ad | 330 | i2c_set_clientdata(i2c, wm8728); |
f0fba2ad LG |
331 | |
332 | ret = snd_soc_register_codec(&i2c->dev, | |
333 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
1a9585b0 | 334 | |
f0fba2ad LG |
335 | return ret; |
336 | } | |
337 | ||
7a79e94e | 338 | static int wm8728_i2c_remove(struct i2c_client *client) |
f0fba2ad LG |
339 | { |
340 | snd_soc_unregister_codec(&client->dev); | |
f0fba2ad LG |
341 | return 0; |
342 | } | |
71cfc902 | 343 | |
f0fba2ad LG |
344 | static const struct i2c_device_id wm8728_i2c_id[] = { |
345 | { "wm8728", 0 }, | |
346 | { } | |
347 | }; | |
348 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
349 | ||
350 | static struct i2c_driver wm8728_i2c_driver = { | |
351 | .driver = { | |
0473e61b | 352 | .name = "wm8728", |
f0fba2ad | 353 | .owner = THIS_MODULE, |
45b4d043 | 354 | .of_match_table = wm8728_of_match, |
f0fba2ad LG |
355 | }, |
356 | .probe = wm8728_i2c_probe, | |
7a79e94e | 357 | .remove = wm8728_i2c_remove, |
f0fba2ad LG |
358 | .id_table = wm8728_i2c_id, |
359 | }; | |
360 | #endif | |
71cfc902 | 361 | |
f0fba2ad LG |
362 | static int __init wm8728_modinit(void) |
363 | { | |
364 | int ret = 0; | |
5c153716 | 365 | #if IS_ENABLED(CONFIG_I2C) |
f0fba2ad LG |
366 | ret = i2c_add_driver(&wm8728_i2c_driver); |
367 | if (ret != 0) { | |
368 | printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", | |
369 | ret); | |
71cfc902 MB |
370 | } |
371 | #endif | |
372 | #if defined(CONFIG_SPI_MASTER) | |
f0fba2ad LG |
373 | ret = spi_register_driver(&wm8728_spi_driver); |
374 | if (ret != 0) { | |
375 | printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", | |
376 | ret); | |
71cfc902 MB |
377 | } |
378 | #endif | |
71cfc902 MB |
379 | return ret; |
380 | } | |
f0fba2ad | 381 | module_init(wm8728_modinit); |
71cfc902 | 382 | |
f0fba2ad | 383 | static void __exit wm8728_exit(void) |
71cfc902 | 384 | { |
5c153716 | 385 | #if IS_ENABLED(CONFIG_I2C) |
71cfc902 MB |
386 | i2c_del_driver(&wm8728_i2c_driver); |
387 | #endif | |
388 | #if defined(CONFIG_SPI_MASTER) | |
389 | spi_unregister_driver(&wm8728_spi_driver); | |
390 | #endif | |
64089b84 MB |
391 | } |
392 | module_exit(wm8728_exit); | |
393 | ||
71cfc902 MB |
394 | MODULE_DESCRIPTION("ASoC WM8728 driver"); |
395 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
396 | MODULE_LICENSE("GPL"); |