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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 | ||
68 | static const struct snd_soc_dapm_route intercon[] = { | |
69 | {"VOUTL", NULL, "DAC"}, | |
70 | {"VOUTR", NULL, "DAC"}, | |
71 | }; | |
72 | ||
73 | static int wm8728_add_widgets(struct snd_soc_codec *codec) | |
74 | { | |
ce6120cc | 75 | struct snd_soc_dapm_context *dapm = &codec->dapm; |
71cfc902 | 76 | |
ce6120cc LG |
77 | snd_soc_dapm_new_controls(dapm, wm8728_dapm_widgets, |
78 | ARRAY_SIZE(wm8728_dapm_widgets)); | |
79 | snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon)); | |
71cfc902 | 80 | |
71cfc902 MB |
81 | return 0; |
82 | } | |
83 | ||
84 | static int wm8728_mute(struct snd_soc_dai *dai, int mute) | |
85 | { | |
86 | struct snd_soc_codec *codec = dai->codec; | |
17a52fd6 | 87 | u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
88 | |
89 | if (mute) | |
17a52fd6 | 90 | snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); |
71cfc902 | 91 | else |
17a52fd6 | 92 | snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); |
71cfc902 MB |
93 | |
94 | return 0; | |
95 | } | |
96 | ||
97 | static int wm8728_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
98 | struct snd_pcm_hw_params *params, |
99 | struct snd_soc_dai *dai) | |
71cfc902 MB |
100 | { |
101 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 102 | struct snd_soc_codec *codec = rtd->codec; |
17a52fd6 | 103 | u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
104 | |
105 | dac &= ~0x18; | |
106 | ||
107 | switch (params_format(params)) { | |
108 | case SNDRV_PCM_FORMAT_S16_LE: | |
109 | break; | |
110 | case SNDRV_PCM_FORMAT_S20_3LE: | |
111 | dac |= 0x10; | |
112 | break; | |
113 | case SNDRV_PCM_FORMAT_S24_LE: | |
114 | dac |= 0x08; | |
115 | break; | |
116 | default: | |
117 | return -EINVAL; | |
118 | } | |
119 | ||
17a52fd6 | 120 | snd_soc_write(codec, WM8728_DACCTL, dac); |
71cfc902 MB |
121 | |
122 | return 0; | |
123 | } | |
124 | ||
125 | static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
126 | unsigned int fmt) | |
127 | { | |
128 | struct snd_soc_codec *codec = codec_dai->codec; | |
17a52fd6 | 129 | u16 iface = snd_soc_read(codec, WM8728_IFCTL); |
71cfc902 MB |
130 | |
131 | /* Currently only I2S is supported by the driver, though the | |
132 | * hardware is more flexible. | |
133 | */ | |
134 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
135 | case SND_SOC_DAIFMT_I2S: | |
136 | iface |= 1; | |
137 | break; | |
138 | default: | |
139 | return -EINVAL; | |
140 | } | |
141 | ||
142 | /* The hardware only support full slave mode */ | |
143 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
144 | case SND_SOC_DAIFMT_CBS_CFS: | |
145 | break; | |
146 | default: | |
147 | return -EINVAL; | |
148 | } | |
149 | ||
150 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
151 | case SND_SOC_DAIFMT_NB_NF: | |
152 | iface &= ~0x22; | |
153 | break; | |
154 | case SND_SOC_DAIFMT_IB_NF: | |
155 | iface |= 0x20; | |
156 | iface &= ~0x02; | |
157 | break; | |
158 | case SND_SOC_DAIFMT_NB_IF: | |
159 | iface |= 0x02; | |
160 | iface &= ~0x20; | |
161 | break; | |
162 | case SND_SOC_DAIFMT_IB_IF: | |
163 | iface |= 0x22; | |
164 | break; | |
165 | default: | |
166 | return -EINVAL; | |
167 | } | |
168 | ||
17a52fd6 | 169 | snd_soc_write(codec, WM8728_IFCTL, iface); |
71cfc902 MB |
170 | return 0; |
171 | } | |
172 | ||
173 | static int wm8728_set_bias_level(struct snd_soc_codec *codec, | |
174 | enum snd_soc_bias_level level) | |
175 | { | |
176 | u16 reg; | |
177 | int i; | |
178 | ||
179 | switch (level) { | |
180 | case SND_SOC_BIAS_ON: | |
181 | case SND_SOC_BIAS_PREPARE: | |
182 | case SND_SOC_BIAS_STANDBY: | |
ce6120cc | 183 | if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { |
71cfc902 | 184 | /* Power everything up... */ |
17a52fd6 MB |
185 | reg = snd_soc_read(codec, WM8728_DACCTL); |
186 | snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); | |
71cfc902 MB |
187 | |
188 | /* ..then sync in the register cache. */ | |
189 | for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) | |
17a52fd6 MB |
190 | snd_soc_write(codec, i, |
191 | snd_soc_read(codec, i)); | |
71cfc902 MB |
192 | } |
193 | break; | |
194 | ||
195 | case SND_SOC_BIAS_OFF: | |
17a52fd6 MB |
196 | reg = snd_soc_read(codec, WM8728_DACCTL); |
197 | snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); | |
71cfc902 MB |
198 | break; |
199 | } | |
ce6120cc | 200 | codec->dapm.bias_level = level; |
71cfc902 MB |
201 | return 0; |
202 | } | |
203 | ||
204 | #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) | |
205 | ||
206 | #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
207 | SNDRV_PCM_FMTBIT_S24_LE) | |
208 | ||
6335d055 EM |
209 | static struct snd_soc_dai_ops wm8728_dai_ops = { |
210 | .hw_params = wm8728_hw_params, | |
211 | .digital_mute = wm8728_mute, | |
212 | .set_fmt = wm8728_set_dai_fmt, | |
213 | }; | |
214 | ||
f0fba2ad LG |
215 | static struct snd_soc_dai_driver wm8728_dai = { |
216 | .name = "wm8728-hifi", | |
71cfc902 MB |
217 | .playback = { |
218 | .stream_name = "Playback", | |
219 | .channels_min = 2, | |
220 | .channels_max = 2, | |
221 | .rates = WM8728_RATES, | |
222 | .formats = WM8728_FORMATS, | |
223 | }, | |
6335d055 | 224 | .ops = &wm8728_dai_ops, |
71cfc902 | 225 | }; |
71cfc902 | 226 | |
f0fba2ad | 227 | static int wm8728_suspend(struct snd_soc_codec *codec, pm_message_t state) |
71cfc902 | 228 | { |
71cfc902 MB |
229 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
f0fba2ad | 234 | static int wm8728_resume(struct snd_soc_codec *codec) |
71cfc902 | 235 | { |
29e189c2 | 236 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); |
71cfc902 MB |
237 | |
238 | return 0; | |
239 | } | |
240 | ||
f0fba2ad | 241 | static int wm8728_probe(struct snd_soc_codec *codec) |
71cfc902 | 242 | { |
f0fba2ad LG |
243 | struct wm8728_priv *wm8728 = snd_soc_codec_get_drvdata(codec); |
244 | int ret; | |
71cfc902 | 245 | |
f0fba2ad | 246 | ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8728->control_type); |
17a52fd6 MB |
247 | if (ret < 0) { |
248 | printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", | |
249 | ret); | |
f0fba2ad | 250 | return ret; |
71cfc902 MB |
251 | } |
252 | ||
253 | /* power on device */ | |
254 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
255 | ||
3e8e1952 IM |
256 | snd_soc_add_controls(codec, wm8728_snd_controls, |
257 | ARRAY_SIZE(wm8728_snd_controls)); | |
71cfc902 | 258 | wm8728_add_widgets(codec); |
71cfc902 MB |
259 | |
260 | return ret; | |
71cfc902 MB |
261 | } |
262 | ||
f0fba2ad | 263 | static int wm8728_remove(struct snd_soc_codec *codec) |
71cfc902 | 264 | { |
f0fba2ad | 265 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); |
71cfc902 MB |
266 | return 0; |
267 | } | |
268 | ||
f0fba2ad LG |
269 | static struct snd_soc_codec_driver soc_codec_dev_wm8728 = { |
270 | .probe = wm8728_probe, | |
271 | .remove = wm8728_remove, | |
272 | .suspend = wm8728_suspend, | |
273 | .resume = wm8728_resume, | |
274 | .set_bias_level = wm8728_set_bias_level, | |
e5eec34c | 275 | .reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults), |
f0fba2ad LG |
276 | .reg_word_size = sizeof(u16), |
277 | .reg_cache_default = wm8728_reg_defaults, | |
71cfc902 MB |
278 | }; |
279 | ||
71cfc902 MB |
280 | #if defined(CONFIG_SPI_MASTER) |
281 | static int __devinit wm8728_spi_probe(struct spi_device *spi) | |
282 | { | |
f0fba2ad | 283 | struct wm8728_priv *wm8728; |
71cfc902 MB |
284 | int ret; |
285 | ||
f0fba2ad LG |
286 | wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL); |
287 | if (wm8728 == NULL) | |
288 | return -ENOMEM; | |
71cfc902 | 289 | |
f0fba2ad LG |
290 | wm8728->control_type = SND_SOC_SPI; |
291 | spi_set_drvdata(spi, wm8728); | |
71cfc902 | 292 | |
f0fba2ad LG |
293 | ret = snd_soc_register_codec(&spi->dev, |
294 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
295 | if (ret < 0) | |
296 | kfree(wm8728); | |
71cfc902 MB |
297 | return ret; |
298 | } | |
299 | ||
300 | static int __devexit wm8728_spi_remove(struct spi_device *spi) | |
301 | { | |
f0fba2ad LG |
302 | snd_soc_unregister_codec(&spi->dev); |
303 | kfree(spi_get_drvdata(spi)); | |
71cfc902 MB |
304 | return 0; |
305 | } | |
306 | ||
307 | static struct spi_driver wm8728_spi_driver = { | |
308 | .driver = { | |
f0fba2ad | 309 | .name = "wm8728-codec", |
71cfc902 MB |
310 | .owner = THIS_MODULE, |
311 | }, | |
312 | .probe = wm8728_spi_probe, | |
313 | .remove = __devexit_p(wm8728_spi_remove), | |
314 | }; | |
71cfc902 MB |
315 | #endif /* CONFIG_SPI_MASTER */ |
316 | ||
f0fba2ad LG |
317 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
318 | static __devinit int wm8728_i2c_probe(struct i2c_client *i2c, | |
319 | const struct i2c_device_id *id) | |
71cfc902 | 320 | { |
f0fba2ad LG |
321 | struct wm8728_priv *wm8728; |
322 | int ret; | |
71cfc902 | 323 | |
f0fba2ad LG |
324 | wm8728 = kzalloc(sizeof(struct wm8728_priv), GFP_KERNEL); |
325 | if (wm8728 == NULL) | |
71cfc902 MB |
326 | return -ENOMEM; |
327 | ||
f0fba2ad | 328 | i2c_set_clientdata(i2c, wm8728); |
f0fba2ad LG |
329 | wm8728->control_type = SND_SOC_I2C; |
330 | ||
331 | ret = snd_soc_register_codec(&i2c->dev, | |
332 | &soc_codec_dev_wm8728, &wm8728_dai, 1); | |
333 | if (ret < 0) | |
334 | kfree(wm8728); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | static __devexit int wm8728_i2c_remove(struct i2c_client *client) | |
339 | { | |
340 | snd_soc_unregister_codec(&client->dev); | |
341 | kfree(i2c_get_clientdata(client)); | |
342 | return 0; | |
343 | } | |
71cfc902 | 344 | |
f0fba2ad LG |
345 | static const struct i2c_device_id wm8728_i2c_id[] = { |
346 | { "wm8728", 0 }, | |
347 | { } | |
348 | }; | |
349 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
350 | ||
351 | static struct i2c_driver wm8728_i2c_driver = { | |
352 | .driver = { | |
353 | .name = "wm8728-codec", | |
354 | .owner = THIS_MODULE, | |
355 | }, | |
356 | .probe = wm8728_i2c_probe, | |
357 | .remove = __devexit_p(wm8728_i2c_remove), | |
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; | |
71cfc902 | 365 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
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 | { |
71cfc902 | 385 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
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"); |