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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> | |
21 | #include <sound/core.h> | |
22 | #include <sound/pcm.h> | |
23 | #include <sound/pcm_params.h> | |
24 | #include <sound/soc.h> | |
25 | #include <sound/soc-dapm.h> | |
26 | #include <sound/initval.h> | |
27 | #include <sound/tlv.h> | |
28 | ||
29 | #include "wm8728.h" | |
30 | ||
31 | struct snd_soc_codec_device soc_codec_dev_wm8728; | |
32 | ||
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 | */ | |
39 | static const u16 wm8728_reg_defaults[] = { | |
40 | 0x1ff, | |
41 | 0x1ff, | |
42 | 0x001, | |
43 | 0x100, | |
44 | }; | |
45 | ||
71cfc902 MB |
46 | static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); |
47 | ||
48 | static const struct snd_kcontrol_new wm8728_snd_controls[] = { | |
49 | ||
50 | SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, | |
51 | 0, 255, 0, wm8728_tlv), | |
52 | ||
53 | SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), | |
54 | }; | |
55 | ||
71cfc902 MB |
56 | /* |
57 | * DAPM controls. | |
58 | */ | |
59 | static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { | |
60 | SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), | |
61 | SND_SOC_DAPM_OUTPUT("VOUTL"), | |
62 | SND_SOC_DAPM_OUTPUT("VOUTR"), | |
63 | }; | |
64 | ||
65 | static const struct snd_soc_dapm_route intercon[] = { | |
66 | {"VOUTL", NULL, "DAC"}, | |
67 | {"VOUTR", NULL, "DAC"}, | |
68 | }; | |
69 | ||
70 | static int wm8728_add_widgets(struct snd_soc_codec *codec) | |
71 | { | |
72 | snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets, | |
73 | ARRAY_SIZE(wm8728_dapm_widgets)); | |
74 | ||
75 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
76 | ||
71cfc902 MB |
77 | return 0; |
78 | } | |
79 | ||
80 | static int wm8728_mute(struct snd_soc_dai *dai, int mute) | |
81 | { | |
82 | struct snd_soc_codec *codec = dai->codec; | |
17a52fd6 | 83 | u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
84 | |
85 | if (mute) | |
17a52fd6 | 86 | snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); |
71cfc902 | 87 | else |
17a52fd6 | 88 | snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); |
71cfc902 MB |
89 | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int wm8728_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
94 | struct snd_pcm_hw_params *params, |
95 | struct snd_soc_dai *dai) | |
71cfc902 MB |
96 | { |
97 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
98 | struct snd_soc_device *socdev = rtd->socdev; | |
6627a653 | 99 | struct snd_soc_codec *codec = socdev->card->codec; |
17a52fd6 | 100 | u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
101 | |
102 | dac &= ~0x18; | |
103 | ||
104 | switch (params_format(params)) { | |
105 | case SNDRV_PCM_FORMAT_S16_LE: | |
106 | break; | |
107 | case SNDRV_PCM_FORMAT_S20_3LE: | |
108 | dac |= 0x10; | |
109 | break; | |
110 | case SNDRV_PCM_FORMAT_S24_LE: | |
111 | dac |= 0x08; | |
112 | break; | |
113 | default: | |
114 | return -EINVAL; | |
115 | } | |
116 | ||
17a52fd6 | 117 | snd_soc_write(codec, WM8728_DACCTL, dac); |
71cfc902 MB |
118 | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
123 | unsigned int fmt) | |
124 | { | |
125 | struct snd_soc_codec *codec = codec_dai->codec; | |
17a52fd6 | 126 | u16 iface = snd_soc_read(codec, WM8728_IFCTL); |
71cfc902 MB |
127 | |
128 | /* Currently only I2S is supported by the driver, though the | |
129 | * hardware is more flexible. | |
130 | */ | |
131 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
132 | case SND_SOC_DAIFMT_I2S: | |
133 | iface |= 1; | |
134 | break; | |
135 | default: | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | /* The hardware only support full slave mode */ | |
140 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
141 | case SND_SOC_DAIFMT_CBS_CFS: | |
142 | break; | |
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
148 | case SND_SOC_DAIFMT_NB_NF: | |
149 | iface &= ~0x22; | |
150 | break; | |
151 | case SND_SOC_DAIFMT_IB_NF: | |
152 | iface |= 0x20; | |
153 | iface &= ~0x02; | |
154 | break; | |
155 | case SND_SOC_DAIFMT_NB_IF: | |
156 | iface |= 0x02; | |
157 | iface &= ~0x20; | |
158 | break; | |
159 | case SND_SOC_DAIFMT_IB_IF: | |
160 | iface |= 0x22; | |
161 | break; | |
162 | default: | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
17a52fd6 | 166 | snd_soc_write(codec, WM8728_IFCTL, iface); |
71cfc902 MB |
167 | return 0; |
168 | } | |
169 | ||
170 | static int wm8728_set_bias_level(struct snd_soc_codec *codec, | |
171 | enum snd_soc_bias_level level) | |
172 | { | |
173 | u16 reg; | |
174 | int i; | |
175 | ||
176 | switch (level) { | |
177 | case SND_SOC_BIAS_ON: | |
178 | case SND_SOC_BIAS_PREPARE: | |
179 | case SND_SOC_BIAS_STANDBY: | |
180 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
181 | /* Power everything up... */ | |
17a52fd6 MB |
182 | reg = snd_soc_read(codec, WM8728_DACCTL); |
183 | snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); | |
71cfc902 MB |
184 | |
185 | /* ..then sync in the register cache. */ | |
186 | for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) | |
17a52fd6 MB |
187 | snd_soc_write(codec, i, |
188 | snd_soc_read(codec, i)); | |
71cfc902 MB |
189 | } |
190 | break; | |
191 | ||
192 | case SND_SOC_BIAS_OFF: | |
17a52fd6 MB |
193 | reg = snd_soc_read(codec, WM8728_DACCTL); |
194 | snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); | |
71cfc902 MB |
195 | break; |
196 | } | |
197 | codec->bias_level = level; | |
198 | return 0; | |
199 | } | |
200 | ||
201 | #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) | |
202 | ||
203 | #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
204 | SNDRV_PCM_FMTBIT_S24_LE) | |
205 | ||
6335d055 EM |
206 | static struct snd_soc_dai_ops wm8728_dai_ops = { |
207 | .hw_params = wm8728_hw_params, | |
208 | .digital_mute = wm8728_mute, | |
209 | .set_fmt = wm8728_set_dai_fmt, | |
210 | }; | |
211 | ||
71cfc902 MB |
212 | struct snd_soc_dai wm8728_dai = { |
213 | .name = "WM8728", | |
214 | .playback = { | |
215 | .stream_name = "Playback", | |
216 | .channels_min = 2, | |
217 | .channels_max = 2, | |
218 | .rates = WM8728_RATES, | |
219 | .formats = WM8728_FORMATS, | |
220 | }, | |
6335d055 | 221 | .ops = &wm8728_dai_ops, |
71cfc902 MB |
222 | }; |
223 | EXPORT_SYMBOL_GPL(wm8728_dai); | |
224 | ||
225 | static int wm8728_suspend(struct platform_device *pdev, pm_message_t state) | |
226 | { | |
227 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 228 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
229 | |
230 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
231 | ||
232 | return 0; | |
233 | } | |
234 | ||
235 | static int wm8728_resume(struct platform_device *pdev) | |
236 | { | |
237 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 238 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
239 | |
240 | wm8728_set_bias_level(codec, codec->suspend_bias_level); | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | /* | |
246 | * initialise the WM8728 driver | |
247 | * register the mixer and dsp interfaces with the kernel | |
248 | */ | |
7084a42b MB |
249 | static int wm8728_init(struct snd_soc_device *socdev, |
250 | enum snd_soc_control_type control) | |
71cfc902 | 251 | { |
6627a653 | 252 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
253 | int ret = 0; |
254 | ||
255 | codec->name = "WM8728"; | |
256 | codec->owner = THIS_MODULE; | |
71cfc902 MB |
257 | codec->set_bias_level = wm8728_set_bias_level; |
258 | codec->dai = &wm8728_dai; | |
259 | codec->num_dai = 1; | |
260 | codec->bias_level = SND_SOC_BIAS_OFF; | |
261 | codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults); | |
262 | codec->reg_cache = kmemdup(wm8728_reg_defaults, | |
263 | sizeof(wm8728_reg_defaults), | |
264 | GFP_KERNEL); | |
265 | if (codec->reg_cache == NULL) | |
266 | return -ENOMEM; | |
267 | ||
7084a42b | 268 | ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); |
17a52fd6 MB |
269 | if (ret < 0) { |
270 | printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", | |
271 | ret); | |
272 | goto err; | |
273 | } | |
274 | ||
71cfc902 MB |
275 | /* register pcms */ |
276 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
277 | if (ret < 0) { | |
278 | printk(KERN_ERR "wm8728: failed to create pcms\n"); | |
17a52fd6 | 279 | goto err; |
71cfc902 MB |
280 | } |
281 | ||
282 | /* power on device */ | |
283 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
284 | ||
3e8e1952 IM |
285 | snd_soc_add_controls(codec, wm8728_snd_controls, |
286 | ARRAY_SIZE(wm8728_snd_controls)); | |
71cfc902 | 287 | wm8728_add_widgets(codec); |
71cfc902 MB |
288 | |
289 | return ret; | |
290 | ||
17a52fd6 | 291 | err: |
71cfc902 MB |
292 | kfree(codec->reg_cache); |
293 | return ret; | |
294 | } | |
295 | ||
296 | static struct snd_soc_device *wm8728_socdev; | |
297 | ||
298 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
299 | ||
300 | /* | |
301 | * WM8728 2 wire address is determined by GPIO5 | |
302 | * state during powerup. | |
303 | * low = 0x1a | |
304 | * high = 0x1b | |
305 | */ | |
306 | ||
307 | static int wm8728_i2c_probe(struct i2c_client *i2c, | |
308 | const struct i2c_device_id *id) | |
309 | { | |
310 | struct snd_soc_device *socdev = wm8728_socdev; | |
6627a653 | 311 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
312 | int ret; |
313 | ||
314 | i2c_set_clientdata(i2c, codec); | |
315 | codec->control_data = i2c; | |
316 | ||
7084a42b | 317 | ret = wm8728_init(socdev, SND_SOC_I2C); |
71cfc902 MB |
318 | if (ret < 0) |
319 | pr_err("failed to initialise WM8728\n"); | |
320 | ||
321 | return ret; | |
322 | } | |
323 | ||
324 | static int wm8728_i2c_remove(struct i2c_client *client) | |
325 | { | |
326 | struct snd_soc_codec *codec = i2c_get_clientdata(client); | |
327 | kfree(codec->reg_cache); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | static const struct i2c_device_id wm8728_i2c_id[] = { | |
332 | { "wm8728", 0 }, | |
333 | { } | |
334 | }; | |
335 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
336 | ||
337 | static struct i2c_driver wm8728_i2c_driver = { | |
338 | .driver = { | |
339 | .name = "WM8728 I2C Codec", | |
340 | .owner = THIS_MODULE, | |
341 | }, | |
342 | .probe = wm8728_i2c_probe, | |
343 | .remove = wm8728_i2c_remove, | |
344 | .id_table = wm8728_i2c_id, | |
345 | }; | |
346 | ||
347 | static int wm8728_add_i2c_device(struct platform_device *pdev, | |
348 | const struct wm8728_setup_data *setup) | |
349 | { | |
350 | struct i2c_board_info info; | |
351 | struct i2c_adapter *adapter; | |
352 | struct i2c_client *client; | |
353 | int ret; | |
354 | ||
355 | ret = i2c_add_driver(&wm8728_i2c_driver); | |
356 | if (ret != 0) { | |
357 | dev_err(&pdev->dev, "can't add i2c driver\n"); | |
358 | return ret; | |
359 | } | |
360 | ||
361 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
362 | info.addr = setup->i2c_address; | |
363 | strlcpy(info.type, "wm8728", I2C_NAME_SIZE); | |
364 | ||
365 | adapter = i2c_get_adapter(setup->i2c_bus); | |
366 | if (!adapter) { | |
367 | dev_err(&pdev->dev, "can't get i2c adapter %d\n", | |
368 | setup->i2c_bus); | |
369 | goto err_driver; | |
370 | } | |
371 | ||
372 | client = i2c_new_device(adapter, &info); | |
373 | i2c_put_adapter(adapter); | |
374 | if (!client) { | |
375 | dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", | |
376 | (unsigned int)info.addr); | |
377 | goto err_driver; | |
378 | } | |
379 | ||
380 | return 0; | |
381 | ||
382 | err_driver: | |
383 | i2c_del_driver(&wm8728_i2c_driver); | |
384 | return -ENODEV; | |
385 | } | |
386 | #endif | |
387 | ||
388 | #if defined(CONFIG_SPI_MASTER) | |
389 | static int __devinit wm8728_spi_probe(struct spi_device *spi) | |
390 | { | |
391 | struct snd_soc_device *socdev = wm8728_socdev; | |
6627a653 | 392 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
393 | int ret; |
394 | ||
395 | codec->control_data = spi; | |
396 | ||
7084a42b | 397 | ret = wm8728_init(socdev, SND_SOC_SPI); |
71cfc902 MB |
398 | if (ret < 0) |
399 | dev_err(&spi->dev, "failed to initialise WM8728\n"); | |
400 | ||
401 | return ret; | |
402 | } | |
403 | ||
404 | static int __devexit wm8728_spi_remove(struct spi_device *spi) | |
405 | { | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static struct spi_driver wm8728_spi_driver = { | |
410 | .driver = { | |
411 | .name = "wm8728", | |
412 | .bus = &spi_bus_type, | |
413 | .owner = THIS_MODULE, | |
414 | }, | |
415 | .probe = wm8728_spi_probe, | |
416 | .remove = __devexit_p(wm8728_spi_remove), | |
417 | }; | |
71cfc902 MB |
418 | #endif /* CONFIG_SPI_MASTER */ |
419 | ||
420 | static int wm8728_probe(struct platform_device *pdev) | |
421 | { | |
422 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
423 | struct wm8728_setup_data *setup; | |
424 | struct snd_soc_codec *codec; | |
425 | int ret = 0; | |
426 | ||
427 | setup = socdev->codec_data; | |
428 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
429 | if (codec == NULL) | |
430 | return -ENOMEM; | |
431 | ||
6627a653 | 432 | socdev->card->codec = codec; |
71cfc902 MB |
433 | mutex_init(&codec->mutex); |
434 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
435 | INIT_LIST_HEAD(&codec->dapm_paths); | |
436 | ||
437 | wm8728_socdev = socdev; | |
438 | ret = -ENODEV; | |
439 | ||
440 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
441 | if (setup->i2c_address) { | |
71cfc902 MB |
442 | ret = wm8728_add_i2c_device(pdev, setup); |
443 | } | |
444 | #endif | |
445 | #if defined(CONFIG_SPI_MASTER) | |
446 | if (setup->spi) { | |
71cfc902 MB |
447 | ret = spi_register_driver(&wm8728_spi_driver); |
448 | if (ret != 0) | |
449 | printk(KERN_ERR "can't add spi driver"); | |
450 | } | |
451 | #endif | |
452 | ||
453 | if (ret != 0) | |
454 | kfree(codec); | |
455 | ||
456 | return ret; | |
457 | } | |
458 | ||
459 | /* power down chip */ | |
460 | static int wm8728_remove(struct platform_device *pdev) | |
461 | { | |
462 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 463 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
464 | |
465 | if (codec->control_data) | |
466 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
467 | ||
468 | snd_soc_free_pcms(socdev); | |
469 | snd_soc_dapm_free(socdev); | |
470 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
471 | i2c_unregister_device(codec->control_data); | |
472 | i2c_del_driver(&wm8728_i2c_driver); | |
473 | #endif | |
474 | #if defined(CONFIG_SPI_MASTER) | |
475 | spi_unregister_driver(&wm8728_spi_driver); | |
476 | #endif | |
477 | kfree(codec); | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
482 | struct snd_soc_codec_device soc_codec_dev_wm8728 = { | |
483 | .probe = wm8728_probe, | |
484 | .remove = wm8728_remove, | |
485 | .suspend = wm8728_suspend, | |
486 | .resume = wm8728_resume, | |
487 | }; | |
488 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728); | |
489 | ||
c9b3a40f | 490 | static int __init wm8728_modinit(void) |
64089b84 MB |
491 | { |
492 | return snd_soc_register_dai(&wm8728_dai); | |
493 | } | |
494 | module_init(wm8728_modinit); | |
495 | ||
496 | static void __exit wm8728_exit(void) | |
497 | { | |
498 | snd_soc_unregister_dai(&wm8728_dai); | |
499 | } | |
500 | module_exit(wm8728_exit); | |
501 | ||
71cfc902 MB |
502 | MODULE_DESCRIPTION("ASoC WM8728 driver"); |
503 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
504 | MODULE_LICENSE("GPL"); |