Commit | Line | Data |
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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 | ||
77 | snd_soc_dapm_new_widgets(codec); | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | static int wm8728_mute(struct snd_soc_dai *dai, int mute) | |
83 | { | |
84 | struct snd_soc_codec *codec = dai->codec; | |
17a52fd6 | 85 | u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
86 | |
87 | if (mute) | |
17a52fd6 | 88 | snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1); |
71cfc902 | 89 | else |
17a52fd6 | 90 | snd_soc_write(codec, WM8728_DACCTL, mute_reg & ~1); |
71cfc902 MB |
91 | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int wm8728_hw_params(struct snd_pcm_substream *substream, | |
dee89c4d MB |
96 | struct snd_pcm_hw_params *params, |
97 | struct snd_soc_dai *dai) | |
71cfc902 MB |
98 | { |
99 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
100 | struct snd_soc_device *socdev = rtd->socdev; | |
6627a653 | 101 | struct snd_soc_codec *codec = socdev->card->codec; |
17a52fd6 | 102 | u16 dac = snd_soc_read(codec, WM8728_DACCTL); |
71cfc902 MB |
103 | |
104 | dac &= ~0x18; | |
105 | ||
106 | switch (params_format(params)) { | |
107 | case SNDRV_PCM_FORMAT_S16_LE: | |
108 | break; | |
109 | case SNDRV_PCM_FORMAT_S20_3LE: | |
110 | dac |= 0x10; | |
111 | break; | |
112 | case SNDRV_PCM_FORMAT_S24_LE: | |
113 | dac |= 0x08; | |
114 | break; | |
115 | default: | |
116 | return -EINVAL; | |
117 | } | |
118 | ||
17a52fd6 | 119 | snd_soc_write(codec, WM8728_DACCTL, dac); |
71cfc902 MB |
120 | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
125 | unsigned int fmt) | |
126 | { | |
127 | struct snd_soc_codec *codec = codec_dai->codec; | |
17a52fd6 | 128 | u16 iface = snd_soc_read(codec, WM8728_IFCTL); |
71cfc902 MB |
129 | |
130 | /* Currently only I2S is supported by the driver, though the | |
131 | * hardware is more flexible. | |
132 | */ | |
133 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
134 | case SND_SOC_DAIFMT_I2S: | |
135 | iface |= 1; | |
136 | break; | |
137 | default: | |
138 | return -EINVAL; | |
139 | } | |
140 | ||
141 | /* The hardware only support full slave mode */ | |
142 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
143 | case SND_SOC_DAIFMT_CBS_CFS: | |
144 | break; | |
145 | default: | |
146 | return -EINVAL; | |
147 | } | |
148 | ||
149 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
150 | case SND_SOC_DAIFMT_NB_NF: | |
151 | iface &= ~0x22; | |
152 | break; | |
153 | case SND_SOC_DAIFMT_IB_NF: | |
154 | iface |= 0x20; | |
155 | iface &= ~0x02; | |
156 | break; | |
157 | case SND_SOC_DAIFMT_NB_IF: | |
158 | iface |= 0x02; | |
159 | iface &= ~0x20; | |
160 | break; | |
161 | case SND_SOC_DAIFMT_IB_IF: | |
162 | iface |= 0x22; | |
163 | break; | |
164 | default: | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
17a52fd6 | 168 | snd_soc_write(codec, WM8728_IFCTL, iface); |
71cfc902 MB |
169 | return 0; |
170 | } | |
171 | ||
172 | static int wm8728_set_bias_level(struct snd_soc_codec *codec, | |
173 | enum snd_soc_bias_level level) | |
174 | { | |
175 | u16 reg; | |
176 | int i; | |
177 | ||
178 | switch (level) { | |
179 | case SND_SOC_BIAS_ON: | |
180 | case SND_SOC_BIAS_PREPARE: | |
181 | case SND_SOC_BIAS_STANDBY: | |
182 | if (codec->bias_level == SND_SOC_BIAS_OFF) { | |
183 | /* Power everything up... */ | |
17a52fd6 MB |
184 | reg = snd_soc_read(codec, WM8728_DACCTL); |
185 | snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4); | |
71cfc902 MB |
186 | |
187 | /* ..then sync in the register cache. */ | |
188 | for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++) | |
17a52fd6 MB |
189 | snd_soc_write(codec, i, |
190 | snd_soc_read(codec, i)); | |
71cfc902 MB |
191 | } |
192 | break; | |
193 | ||
194 | case SND_SOC_BIAS_OFF: | |
17a52fd6 MB |
195 | reg = snd_soc_read(codec, WM8728_DACCTL); |
196 | snd_soc_write(codec, WM8728_DACCTL, reg | 0x4); | |
71cfc902 MB |
197 | break; |
198 | } | |
199 | codec->bias_level = level; | |
200 | return 0; | |
201 | } | |
202 | ||
203 | #define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) | |
204 | ||
205 | #define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
206 | SNDRV_PCM_FMTBIT_S24_LE) | |
207 | ||
6335d055 EM |
208 | static struct snd_soc_dai_ops wm8728_dai_ops = { |
209 | .hw_params = wm8728_hw_params, | |
210 | .digital_mute = wm8728_mute, | |
211 | .set_fmt = wm8728_set_dai_fmt, | |
212 | }; | |
213 | ||
71cfc902 MB |
214 | struct snd_soc_dai wm8728_dai = { |
215 | .name = "WM8728", | |
216 | .playback = { | |
217 | .stream_name = "Playback", | |
218 | .channels_min = 2, | |
219 | .channels_max = 2, | |
220 | .rates = WM8728_RATES, | |
221 | .formats = WM8728_FORMATS, | |
222 | }, | |
6335d055 | 223 | .ops = &wm8728_dai_ops, |
71cfc902 MB |
224 | }; |
225 | EXPORT_SYMBOL_GPL(wm8728_dai); | |
226 | ||
227 | static int wm8728_suspend(struct platform_device *pdev, pm_message_t state) | |
228 | { | |
229 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 230 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
231 | |
232 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | static int wm8728_resume(struct platform_device *pdev) | |
238 | { | |
239 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 240 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
241 | |
242 | wm8728_set_bias_level(codec, codec->suspend_bias_level); | |
243 | ||
244 | return 0; | |
245 | } | |
246 | ||
247 | /* | |
248 | * initialise the WM8728 driver | |
249 | * register the mixer and dsp interfaces with the kernel | |
250 | */ | |
7084a42b MB |
251 | static int wm8728_init(struct snd_soc_device *socdev, |
252 | enum snd_soc_control_type control) | |
71cfc902 | 253 | { |
6627a653 | 254 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
255 | int ret = 0; |
256 | ||
257 | codec->name = "WM8728"; | |
258 | codec->owner = THIS_MODULE; | |
71cfc902 MB |
259 | codec->set_bias_level = wm8728_set_bias_level; |
260 | codec->dai = &wm8728_dai; | |
261 | codec->num_dai = 1; | |
262 | codec->bias_level = SND_SOC_BIAS_OFF; | |
263 | codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults); | |
264 | codec->reg_cache = kmemdup(wm8728_reg_defaults, | |
265 | sizeof(wm8728_reg_defaults), | |
266 | GFP_KERNEL); | |
267 | if (codec->reg_cache == NULL) | |
268 | return -ENOMEM; | |
269 | ||
7084a42b | 270 | ret = snd_soc_codec_set_cache_io(codec, 7, 9, control); |
17a52fd6 MB |
271 | if (ret < 0) { |
272 | printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n", | |
273 | ret); | |
274 | goto err; | |
275 | } | |
276 | ||
71cfc902 MB |
277 | /* register pcms */ |
278 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
279 | if (ret < 0) { | |
280 | printk(KERN_ERR "wm8728: failed to create pcms\n"); | |
17a52fd6 | 281 | goto err; |
71cfc902 MB |
282 | } |
283 | ||
284 | /* power on device */ | |
285 | wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY); | |
286 | ||
3e8e1952 IM |
287 | snd_soc_add_controls(codec, wm8728_snd_controls, |
288 | ARRAY_SIZE(wm8728_snd_controls)); | |
71cfc902 | 289 | wm8728_add_widgets(codec); |
968a6025 | 290 | ret = snd_soc_init_card(socdev); |
71cfc902 MB |
291 | if (ret < 0) { |
292 | printk(KERN_ERR "wm8728: failed to register card\n"); | |
293 | goto card_err; | |
294 | } | |
295 | ||
296 | return ret; | |
297 | ||
298 | card_err: | |
299 | snd_soc_free_pcms(socdev); | |
300 | snd_soc_dapm_free(socdev); | |
17a52fd6 | 301 | err: |
71cfc902 MB |
302 | kfree(codec->reg_cache); |
303 | return ret; | |
304 | } | |
305 | ||
306 | static struct snd_soc_device *wm8728_socdev; | |
307 | ||
308 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
309 | ||
310 | /* | |
311 | * WM8728 2 wire address is determined by GPIO5 | |
312 | * state during powerup. | |
313 | * low = 0x1a | |
314 | * high = 0x1b | |
315 | */ | |
316 | ||
317 | static int wm8728_i2c_probe(struct i2c_client *i2c, | |
318 | const struct i2c_device_id *id) | |
319 | { | |
320 | struct snd_soc_device *socdev = wm8728_socdev; | |
6627a653 | 321 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
322 | int ret; |
323 | ||
324 | i2c_set_clientdata(i2c, codec); | |
325 | codec->control_data = i2c; | |
326 | ||
7084a42b | 327 | ret = wm8728_init(socdev, SND_SOC_I2C); |
71cfc902 MB |
328 | if (ret < 0) |
329 | pr_err("failed to initialise WM8728\n"); | |
330 | ||
331 | return ret; | |
332 | } | |
333 | ||
334 | static int wm8728_i2c_remove(struct i2c_client *client) | |
335 | { | |
336 | struct snd_soc_codec *codec = i2c_get_clientdata(client); | |
337 | kfree(codec->reg_cache); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static const struct i2c_device_id wm8728_i2c_id[] = { | |
342 | { "wm8728", 0 }, | |
343 | { } | |
344 | }; | |
345 | MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); | |
346 | ||
347 | static struct i2c_driver wm8728_i2c_driver = { | |
348 | .driver = { | |
349 | .name = "WM8728 I2C Codec", | |
350 | .owner = THIS_MODULE, | |
351 | }, | |
352 | .probe = wm8728_i2c_probe, | |
353 | .remove = wm8728_i2c_remove, | |
354 | .id_table = wm8728_i2c_id, | |
355 | }; | |
356 | ||
357 | static int wm8728_add_i2c_device(struct platform_device *pdev, | |
358 | const struct wm8728_setup_data *setup) | |
359 | { | |
360 | struct i2c_board_info info; | |
361 | struct i2c_adapter *adapter; | |
362 | struct i2c_client *client; | |
363 | int ret; | |
364 | ||
365 | ret = i2c_add_driver(&wm8728_i2c_driver); | |
366 | if (ret != 0) { | |
367 | dev_err(&pdev->dev, "can't add i2c driver\n"); | |
368 | return ret; | |
369 | } | |
370 | ||
371 | memset(&info, 0, sizeof(struct i2c_board_info)); | |
372 | info.addr = setup->i2c_address; | |
373 | strlcpy(info.type, "wm8728", I2C_NAME_SIZE); | |
374 | ||
375 | adapter = i2c_get_adapter(setup->i2c_bus); | |
376 | if (!adapter) { | |
377 | dev_err(&pdev->dev, "can't get i2c adapter %d\n", | |
378 | setup->i2c_bus); | |
379 | goto err_driver; | |
380 | } | |
381 | ||
382 | client = i2c_new_device(adapter, &info); | |
383 | i2c_put_adapter(adapter); | |
384 | if (!client) { | |
385 | dev_err(&pdev->dev, "can't add i2c device at 0x%x\n", | |
386 | (unsigned int)info.addr); | |
387 | goto err_driver; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | ||
392 | err_driver: | |
393 | i2c_del_driver(&wm8728_i2c_driver); | |
394 | return -ENODEV; | |
395 | } | |
396 | #endif | |
397 | ||
398 | #if defined(CONFIG_SPI_MASTER) | |
399 | static int __devinit wm8728_spi_probe(struct spi_device *spi) | |
400 | { | |
401 | struct snd_soc_device *socdev = wm8728_socdev; | |
6627a653 | 402 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
403 | int ret; |
404 | ||
405 | codec->control_data = spi; | |
406 | ||
7084a42b | 407 | ret = wm8728_init(socdev, SND_SOC_SPI); |
71cfc902 MB |
408 | if (ret < 0) |
409 | dev_err(&spi->dev, "failed to initialise WM8728\n"); | |
410 | ||
411 | return ret; | |
412 | } | |
413 | ||
414 | static int __devexit wm8728_spi_remove(struct spi_device *spi) | |
415 | { | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static struct spi_driver wm8728_spi_driver = { | |
420 | .driver = { | |
421 | .name = "wm8728", | |
422 | .bus = &spi_bus_type, | |
423 | .owner = THIS_MODULE, | |
424 | }, | |
425 | .probe = wm8728_spi_probe, | |
426 | .remove = __devexit_p(wm8728_spi_remove), | |
427 | }; | |
71cfc902 MB |
428 | #endif /* CONFIG_SPI_MASTER */ |
429 | ||
430 | static int wm8728_probe(struct platform_device *pdev) | |
431 | { | |
432 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
433 | struct wm8728_setup_data *setup; | |
434 | struct snd_soc_codec *codec; | |
435 | int ret = 0; | |
436 | ||
437 | setup = socdev->codec_data; | |
438 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
439 | if (codec == NULL) | |
440 | return -ENOMEM; | |
441 | ||
6627a653 | 442 | socdev->card->codec = codec; |
71cfc902 MB |
443 | mutex_init(&codec->mutex); |
444 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
445 | INIT_LIST_HEAD(&codec->dapm_paths); | |
446 | ||
447 | wm8728_socdev = socdev; | |
448 | ret = -ENODEV; | |
449 | ||
450 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
451 | if (setup->i2c_address) { | |
71cfc902 MB |
452 | ret = wm8728_add_i2c_device(pdev, setup); |
453 | } | |
454 | #endif | |
455 | #if defined(CONFIG_SPI_MASTER) | |
456 | if (setup->spi) { | |
71cfc902 MB |
457 | ret = spi_register_driver(&wm8728_spi_driver); |
458 | if (ret != 0) | |
459 | printk(KERN_ERR "can't add spi driver"); | |
460 | } | |
461 | #endif | |
462 | ||
463 | if (ret != 0) | |
464 | kfree(codec); | |
465 | ||
466 | return ret; | |
467 | } | |
468 | ||
469 | /* power down chip */ | |
470 | static int wm8728_remove(struct platform_device *pdev) | |
471 | { | |
472 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 473 | struct snd_soc_codec *codec = socdev->card->codec; |
71cfc902 MB |
474 | |
475 | if (codec->control_data) | |
476 | wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF); | |
477 | ||
478 | snd_soc_free_pcms(socdev); | |
479 | snd_soc_dapm_free(socdev); | |
480 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
481 | i2c_unregister_device(codec->control_data); | |
482 | i2c_del_driver(&wm8728_i2c_driver); | |
483 | #endif | |
484 | #if defined(CONFIG_SPI_MASTER) | |
485 | spi_unregister_driver(&wm8728_spi_driver); | |
486 | #endif | |
487 | kfree(codec); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | struct snd_soc_codec_device soc_codec_dev_wm8728 = { | |
493 | .probe = wm8728_probe, | |
494 | .remove = wm8728_remove, | |
495 | .suspend = wm8728_suspend, | |
496 | .resume = wm8728_resume, | |
497 | }; | |
498 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728); | |
499 | ||
c9b3a40f | 500 | static int __init wm8728_modinit(void) |
64089b84 MB |
501 | { |
502 | return snd_soc_register_dai(&wm8728_dai); | |
503 | } | |
504 | module_init(wm8728_modinit); | |
505 | ||
506 | static void __exit wm8728_exit(void) | |
507 | { | |
508 | snd_soc_unregister_dai(&wm8728_dai); | |
509 | } | |
510 | module_exit(wm8728_exit); | |
511 | ||
71cfc902 MB |
512 | MODULE_DESCRIPTION("ASoC WM8728 driver"); |
513 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); | |
514 | MODULE_LICENSE("GPL"); |