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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> | |
20 | #include <linux/spi/spi.h> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
71cfc902 MB |
22 | #include <sound/core.h> |
23 | #include <sound/pcm.h> | |
24 | #include <sound/pcm_params.h> | |
25 | #include <sound/soc.h> | |
71cfc902 MB |
26 | #include <sound/initval.h> |
27 | #include <sound/tlv.h> | |
28 | ||
29 | #include "wm8728.h" | |
30 | ||
71cfc902 MB |
31 | /* |
32 | * We can't read the WM8728 register space so we cache them instead. | |
33 | * Note that the defaults here aren't the physical defaults, we latch | |
34 | * the volume update bits, mute the output and enable infinite zero | |
35 | * detect. | |
36 | */ | |
37 | static const u16 wm8728_reg_defaults[] = { | |
38 | 0x1ff, | |
39 | 0x1ff, | |
40 | 0x001, | |
41 | 0x100, | |
42 | }; | |
43 | ||
f0fba2ad LG |
44 | /* codec private data */ |
45 | struct wm8728_priv { | |
46 | enum snd_soc_control_type control_type; | |
f0fba2ad LG |
47 | }; |
48 | ||
71cfc902 MB |
49 | static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); |
50 | ||
51 | static const struct snd_kcontrol_new wm8728_snd_controls[] = { | |
52 | ||
53 | SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, | |
54 | 0, 255, 0, wm8728_tlv), | |
55 | ||
56 | SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), | |
57 | }; | |
58 | ||
71cfc902 MB |
59 | /* |
60 | * DAPM controls. | |
61 | */ | |
62 | static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { | |
63 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), | |
64 | SND_SOC_DAPM_OUTPUT("VOUTL"), | |
65 | SND_SOC_DAPM_OUTPUT("VOUTR"), | |
66 | }; | |
67 | ||
8428edf9 | 68 | static const struct snd_soc_dapm_route wm8728_intercon[] = { |
71cfc902 MB |
69 | {"VOUTL", NULL, "DAC"}, |
70 | {"VOUTR", NULL, "DAC"}, | |
71 | }; | |
72 | ||
71cfc902 MB |
73 | static int wm8728_mute(struct snd_soc_dai *dai, int mute) |
74 | { | |
75 | struct snd_soc_codec *codec = dai->codec; | |
17a52fd6 | 76 | u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
77 | |
78 | if (mute) | |
17a52fd6 | 79 | snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); |
71cfc902 | 80 | else |
17a52fd6 | 81 | snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); |
71cfc902 MB |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
86 | static int wm8728_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
87 | struct snd_pcm_hw_params *params, |
88 | struct snd_soc_dai *dai) | |
71cfc902 MB |
89 | { |
90 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 91 | struct snd_soc_codec *codec = rtd->codec; |
17a52fd6 | 92 | u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
93 | |
94 | dac &= ~0x18; | |
95 | ||
96 | switch (params_format(params)) { | |
97 | case SNDRV_PCM_FORMAT_S16_LE: | |
98 | break; | |
99 | case SNDRV_PCM_FORMAT_S20_3LE: | |
100 | dac |= 0x10; | |
101 | break; | |
102 | case SNDRV_PCM_FORMAT_S24_LE: | |
103 | dac |= 0x08; | |
104 | break; | |
105 | default: | |
106 | return -EINVAL; | |
107 | } | |
108 | ||
17a52fd6 | 109 | snd_soc_write(codec, WM8728_DACCTL, dac); |
71cfc902 MB |
110 | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
115 | unsigned int fmt) | |
116 | { | |
117 | struct snd_soc_codec *codec = codec_dai->codec; | |
17a52fd6 | 118 | u16 iface = snd_soc_read(codec, WM8728_IFCTL); |
71cfc902 MB |
119 | |
120 | /* Currently only I2S is supported by the driver, though the | |
121 | * hardware is more flexible. | |
122 | */ | |
123 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
124 | case SND_SOC_DAIFMT_I2S: | |
125 | iface |= 1; | |
126 | break; | |
127 | default: | |
128 | return -EINVAL; | |
129 | } | |
130 | ||
131 | /* The hardware only support full slave mode */ | |
132 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
133 | case SND_SOC_DAIFMT_CBS_CFS: | |
134 | break; | |
135 | default: | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
140 | case SND_SOC_DAIFMT_NB_NF: | |
141 | iface &= ~0x22; | |
142 | break; | |
143 | case SND_SOC_DAIFMT_IB_NF: | |
144 | iface |= 0x20; | |
145 | iface &= ~0x02; | |
146 | break; | |
147 | case SND_SOC_DAIFMT_NB_IF: | |
148 | iface |= 0x02; | |
149 | iface &= ~0x20; | |
150 | break; | |
151 | case SND_SOC_DAIFMT_IB_IF: | |
152 | iface |= 0x22; | |
153 | break; | |
154 | default: | |
155 | return -EINVAL; | |
156 | } | |
157 | ||
17a52fd6 | 158 | snd_soc_write(codec, WM8728_IFCTL, iface); |
71cfc902 MB |
159 | return 0; |
160 | } | |
161 | ||
162 | static int wm8728_set_bias_level(struct snd_soc_codec *codec, | |
163 | enum snd_soc_bias_level level) | |
164 | { | |
165 | u16 reg; | |
166 | int i; | |
167 | ||
168 | switch (level) { | |
169 | case SND_SOC_BIAS_ON: | |
170 | case SND_SOC_BIAS_PREPARE: | |
171 | case SND_SOC_BIAS_STANDBY: | |
ce6120cc | 172 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { |
71cfc902 | 173 | /* Power everything up... */ |
17a52fd6 MB |
174 | reg = snd_soc_read(codec, WM8728_DACCTL); |
175 | snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); | |
71cfc902 MB |
176 | |
177 | /* ..then sync in the register cache. */ | |
178 | for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) | |
17a52fd6 MB |
179 | snd_soc_write(codec, i, |
180 | snd_soc_read(codec, i)); | |
71cfc902 MB |
181 | } |
182 | break; | |
183 | ||
184 | case SND_SOC_BIAS_OFF: | |
17a52fd6 MB |
185 | reg = snd_soc_read(codec, WM8728_DACCTL); |
186 | snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); | |
71cfc902 MB |
187 | break; |
188 | } | |
ce6120cc | 189 | codec->dapm.bias_level = level; |
71cfc902 MB |
190 | return 0; |
191 | } | |
192 | ||
193 | #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) | |
194 | ||
195 | #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
196 | SNDRV_PCM_FMTBIT_S24_LE) | |
197 | ||
6335d055 EM |
198 | static struct snd_soc_dai_ops wm8728_dai_ops = { |
199 | .hw_params = wm8728_hw_params, | |
200 | .digital_mute = wm8728_mute, | |
201 | .set_fmt = wm8728_set_dai_fmt, | |
202 | }; | |
203 | ||
f0fba2ad LG |
204 | static struct snd_soc_dai_driver wm8728_dai = { |
205 | .name = "wm8728-hifi", | |
71cfc902 MB |
206 | .playback = { |
207 | .stream_name = "Playback", | |
208 | .channels_min = 2, | |
209 | .channels_max = 2, | |
210 | .rates = WM8728_RATES, | |
211 | .formats = WM8728_FORMATS, | |
212 | }, | |
6335d055 | 213 | .ops = &wm8728_dai_ops, |
71cfc902 | 214 | }; |
71cfc902 | 215 | |
f0fba2ad | 216 | static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state) |
71cfc902 | 217 | { |
71cfc902 MB |
218 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
f0fba2ad | 223 | static int wm8728_resume(struct snd_soc_codec *codec) |
71cfc902 | 224 | { |
29e189c2 | 225 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
71cfc902 MB |
226 | |
227 | return 0; | |
228 | } | |
229 | ||
f0fba2ad | 230 | static int wm8728_probe(struct snd_soc_codec *codec) |
71cfc902 | 231 | { |
f0fba2ad LG |
232 | struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec); |
233 | int ret; | |
71cfc902 | 234 | |
f0fba2ad | 235 | ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type); |
17a52fd6 MB |
236 | if (ret < 0) { |
237 | printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", | |
238 | ret); | |
f0fba2ad | 239 | return ret; |
71cfc902 MB |
240 | } |
241 | ||
242 | /* power on device */ | |
243 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
244 | ||
3e8e1952 IM |
245 | snd_soc_add_controls(codec, wm8728_snd_controls, |
246 | ARRAY_SIZE(wm8728_snd_controls)); | |
71cfc902 MB |
247 | |
248 | return ret; | |
71cfc902 MB |
249 | } |
250 | ||
f0fba2ad | 251 | static int wm8728_remove(struct snd_soc_codec *codec) |
71cfc902 | 252 | { |
f0fba2ad | 253 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
71cfc902 MB |
254 | return 0; |
255 | } | |
256 | ||
f0fba2ad LG |
257 | static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { |
258 | .probe = wm8728_probe, | |
259 | .remove = wm8728_remove, | |
260 | .suspend = wm8728_suspend, | |
261 | .resume = wm8728_resume, | |
262 | .set_bias_level = wm8728_set_bias_level, | |
e5eec34c | 263 | .reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults), |
f0fba2ad LG |
264 | .reg_word_size = sizeof(u16), |
265 | .reg_cache_default = wm8728_reg_defaults, | |
8428edf9 LG |
266 | .dapm_widgets = wm8728_dapm_widgets, |
267 | .num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), | |
268 | .dapm_routes = wm8728_intercon, | |
269 | .num_dapm_routes = ARRAY_SIZE(wm8728_intercon), | |
71cfc902 MB |
270 | }; |
271 | ||
71cfc902 MB |
272 | #if defined(CONFIG_SPI_MASTER) |
273 | static int __devinit wm8728_spi_probe(struct spi_device *spi) | |
274 | { | |
f0fba2ad | 275 | struct wm8728_priv *wm8728; |
71cfc902 MB |
276 | int ret; |
277 | ||
f0fba2ad LG |
278 | wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL); |
279 | if (wm8728 == NULL) | |
280 | return -ENOMEM; | |
71cfc902 | 281 | |
f0fba2ad LG |
282 | wm8728->control_type = SND_SOC_SPI; |
283 | spi_set_drvdata(spi, wm8728); | |
71cfc902 | 284 | |
f0fba2ad LG |
285 | ret = snd_soc_register_codec(&spi->dev, |
286 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
287 | if (ret < 0) | |
288 | kfree(wm8728); | |
71cfc902 MB |
289 | return ret; |
290 | } | |
291 | ||
292 | static int __devexit wm8728_spi_remove(struct spi_device *spi) | |
293 | { | |
f0fba2ad LG |
294 | snd_soc_unregister_codec(&spi->dev); |
295 | kfree(spi_get_drvdata(spi)); | |
71cfc902 MB |
296 | return 0; |
297 | } | |
298 | ||
299 | static struct spi_driver wm8728_spi_driver = { | |
300 | .driver = { | |
f0fba2ad | 301 | .name = "wm8728-codec", |
71cfc902 MB |
302 | .owner = THIS_MODULE, |
303 | }, | |
304 | .probe = wm8728_spi_probe, | |
305 | .remove = __devexit_p(wm8728_spi_remove), | |
306 | }; | |
71cfc902 MB |
307 | #endif /* CONFIG_SPI_MASTER */ |
308 | ||
f0fba2ad LG |
309 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
310 | static __devinit int wm8728_i2c_probe(struct i2c_client *i2c, | |
311 | const struct i2c_device_id *id) | |
71cfc902 | 312 | { |
f0fba2ad LG |
313 | struct wm8728_priv *wm8728; |
314 | int ret; | |
71cfc902 | 315 | |
f0fba2ad LG |
316 | wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL); |
317 | if (wm8728 == NULL) | |
71cfc902 MB |
318 | return -ENOMEM; |
319 | ||
f0fba2ad | 320 | i2c_set_clientdata(i2c, wm8728); |
f0fba2ad LG |
321 | wm8728->control_type = SND_SOC_I2C; |
322 | ||
323 | ret = snd_soc_register_codec(&i2c->dev, | |
324 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
325 | if (ret < 0) | |
326 | kfree(wm8728); | |
327 | return ret; | |
328 | } | |
329 | ||
330 | static __devexit int wm8728_i2c_remove(struct i2c_client *client) | |
331 | { | |
332 | snd_soc_unregister_codec(&client->dev); | |
333 | kfree(i2c_get_clientdata(client)); | |
334 | return 0; | |
335 | } | |
71cfc902 | 336 | |
f0fba2ad LG |
337 | static const struct i2c_device_id wm8728_i2c_id[] = { |
338 | { "wm8728", 0 }, | |
339 | { } | |
340 | }; | |
341 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
342 | ||
343 | static struct i2c_driver wm8728_i2c_driver = { | |
344 | .driver = { | |
345 | .name = "wm8728-codec", | |
346 | .owner = THIS_MODULE, | |
347 | }, | |
348 | .probe = wm8728_i2c_probe, | |
349 | .remove = __devexit_p(wm8728_i2c_remove), | |
350 | .id_table = wm8728_i2c_id, | |
351 | }; | |
352 | #endif | |
71cfc902 | 353 | |
f0fba2ad LG |
354 | static int __init wm8728_modinit(void) |
355 | { | |
356 | int ret = 0; | |
71cfc902 | 357 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
f0fba2ad LG |
358 | ret = i2c_add_driver(&wm8728_i2c_driver); |
359 | if (ret != 0) { | |
360 | printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", | |
361 | ret); | |
71cfc902 MB |
362 | } |
363 | #endif | |
364 | #if defined(CONFIG_SPI_MASTER) | |
f0fba2ad LG |
365 | ret = spi_register_driver(&wm8728_spi_driver); |
366 | if (ret != 0) { | |
367 | printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", | |
368 | ret); | |
71cfc902 MB |
369 | } |
370 | #endif | |
71cfc902 MB |
371 | return ret; |
372 | } | |
f0fba2ad | 373 | module_init(wm8728_modinit); |
71cfc902 | 374 | |
f0fba2ad | 375 | static void __exit wm8728_exit(void) |
71cfc902 | 376 | { |
71cfc902 | 377 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
71cfc902 MB |
378 | i2c_del_driver(&wm8728_i2c_driver); |
379 | #endif | |
380 | #if defined(CONFIG_SPI_MASTER) | |
381 | spi_unregister_driver(&wm8728_spi_driver); | |
382 | #endif | |
64089b84 MB |
383 | } |
384 | module_exit(wm8728_exit); | |
385 | ||
71cfc902 MB |
386 | MODULE_DESCRIPTION("ASoC WM8728 driver"); |
387 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
388 | MODULE_LICENSE("GPL"); |