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7eaae41e BS |
1 | /* |
2 | * File: sound/soc/codecs/ad1836.c | |
3 | * Author: Barry Song <Barry.Song@analog.com> | |
4 | * | |
5 | * Created: Aug 04 2009 | |
6 | * Description: Driver for AD1836 sound chip | |
7 | * | |
8 | * Modified: | |
9 | * Copyright 2009 Analog Devices Inc. | |
10 | * | |
11 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | */ | |
18 | ||
19 | #include <linux/init.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
7eaae41e | 21 | #include <linux/module.h> |
7eaae41e BS |
22 | #include <linux/kernel.h> |
23 | #include <linux/device.h> | |
24 | #include <sound/core.h> | |
25 | #include <sound/pcm.h> | |
26 | #include <sound/pcm_params.h> | |
27 | #include <sound/initval.h> | |
28 | #include <sound/soc.h> | |
29 | #include <sound/tlv.h> | |
30 | #include <sound/soc-dapm.h> | |
31 | #include <linux/spi/spi.h> | |
32 | #include "ad1836.h" | |
33 | ||
34 | /* codec private data */ | |
35 | struct ad1836_priv { | |
36 | struct snd_soc_codec codec; | |
37 | u16 reg_cache[AD1836_NUM_REGS]; | |
38 | }; | |
39 | ||
40 | static struct snd_soc_codec *ad1836_codec; | |
41 | struct snd_soc_codec_device soc_codec_dev_ad1836; | |
42 | static int ad1836_register(struct ad1836_priv *ad1836); | |
43 | static void ad1836_unregister(struct ad1836_priv *ad1836); | |
44 | ||
45 | /* | |
46 | * AD1836 volume/mute/de-emphasis etc. controls | |
47 | */ | |
48 | static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"}; | |
49 | ||
50 | static const struct soc_enum ad1836_deemp_enum = | |
51 | SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp); | |
52 | ||
53 | static const struct snd_kcontrol_new ad1836_snd_controls[] = { | |
54 | /* DAC volume control */ | |
55 | SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL, | |
56 | AD1836_DAC_R1_VOL, 0, 0x3FF, 0), | |
57 | SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL, | |
58 | AD1836_DAC_R2_VOL, 0, 0x3FF, 0), | |
59 | SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL, | |
60 | AD1836_DAC_R3_VOL, 0, 0x3FF, 0), | |
61 | ||
62 | /* ADC switch control */ | |
63 | SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE, | |
64 | AD1836_ADCR1_MUTE, 1, 1), | |
65 | SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE, | |
66 | AD1836_ADCR2_MUTE, 1, 1), | |
67 | ||
68 | /* DAC switch control */ | |
69 | SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE, | |
70 | AD1836_DACR1_MUTE, 1, 1), | |
71 | SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE, | |
72 | AD1836_DACR2_MUTE, 1, 1), | |
73 | SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE, | |
74 | AD1836_DACR3_MUTE, 1, 1), | |
75 | ||
76 | /* ADC high-pass filter */ | |
77 | SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1, | |
78 | AD1836_ADC_HIGHPASS_FILTER, 1, 0), | |
79 | ||
80 | /* DAC de-emphasis */ | |
81 | SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum), | |
82 | }; | |
83 | ||
84 | static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = { | |
85 | SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1, | |
86 | AD1836_DAC_POWERDOWN, 1), | |
87 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), | |
88 | SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1, | |
89 | AD1836_ADC_POWERDOWN, 1, NULL, 0), | |
90 | SND_SOC_DAPM_OUTPUT("DAC1OUT"), | |
91 | SND_SOC_DAPM_OUTPUT("DAC2OUT"), | |
92 | SND_SOC_DAPM_OUTPUT("DAC3OUT"), | |
93 | SND_SOC_DAPM_INPUT("ADC1IN"), | |
94 | SND_SOC_DAPM_INPUT("ADC2IN"), | |
95 | }; | |
96 | ||
97 | static const struct snd_soc_dapm_route audio_paths[] = { | |
98 | { "DAC", NULL, "ADC_PWR" }, | |
99 | { "ADC", NULL, "ADC_PWR" }, | |
100 | { "DAC1OUT", "DAC1 Switch", "DAC" }, | |
101 | { "DAC2OUT", "DAC2 Switch", "DAC" }, | |
102 | { "DAC3OUT", "DAC3 Switch", "DAC" }, | |
103 | { "ADC", "ADC1 Switch", "ADC1IN" }, | |
104 | { "ADC", "ADC2 Switch", "ADC2IN" }, | |
105 | }; | |
106 | ||
107 | /* | |
108 | * DAI ops entries | |
109 | */ | |
110 | ||
111 | static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
112 | unsigned int fmt) | |
113 | { | |
114 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
115 | /* at present, we support adc aux mode to interface with | |
116 | * blackfin sport tdm mode | |
117 | */ | |
118 | case SND_SOC_DAIFMT_DSP_A: | |
119 | break; | |
120 | default: | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
125 | case SND_SOC_DAIFMT_IB_IF: | |
126 | break; | |
127 | default: | |
128 | return -EINVAL; | |
129 | } | |
130 | ||
131 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
132 | /* ALCLK,ABCLK are both output, AD1836 can only be master */ | |
133 | case SND_SOC_DAIFMT_CBM_CFM: | |
134 | break; | |
135 | default: | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int ad1836_hw_params(struct snd_pcm_substream *substream, | |
143 | struct snd_pcm_hw_params *params, | |
144 | struct snd_soc_dai *dai) | |
145 | { | |
146 | int word_len = 0; | |
147 | ||
148 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
149 | struct snd_soc_device *socdev = rtd->socdev; | |
150 | struct snd_soc_codec *codec = socdev->card->codec; | |
151 | ||
152 | /* bit size */ | |
153 | switch (params_format(params)) { | |
154 | case SNDRV_PCM_FORMAT_S16_LE: | |
155 | word_len = 3; | |
156 | break; | |
157 | case SNDRV_PCM_FORMAT_S20_3LE: | |
158 | word_len = 1; | |
159 | break; | |
160 | case SNDRV_PCM_FORMAT_S24_LE: | |
161 | case SNDRV_PCM_FORMAT_S32_LE: | |
162 | word_len = 0; | |
163 | break; | |
164 | } | |
165 | ||
166 | snd_soc_update_bits(codec, AD1836_DAC_CTRL1, | |
167 | AD1836_DAC_WORD_LEN_MASK, word_len); | |
168 | ||
169 | snd_soc_update_bits(codec, AD1836_ADC_CTRL2, | |
170 | AD1836_ADC_WORD_LEN_MASK, word_len); | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
84549d23 BS |
175 | #ifdef CONFIG_PM |
176 | static int ad1836_soc_suspend(struct platform_device *pdev, | |
177 | pm_message_t state) | |
178 | { | |
179 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
180 | struct snd_soc_codec *codec = socdev->card->codec; | |
181 | ||
182 | /* reset clock control mode */ | |
63b62ab0 | 183 | u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); |
84549d23 BS |
184 | adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK; |
185 | ||
63b62ab0 | 186 | return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); |
84549d23 BS |
187 | } |
188 | ||
189 | static int ad1836_soc_resume(struct platform_device *pdev) | |
190 | { | |
191 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
192 | struct snd_soc_codec *codec = socdev->card->codec; | |
193 | ||
194 | /* restore clock control mode */ | |
63b62ab0 | 195 | u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2); |
84549d23 BS |
196 | adc_ctrl2 |= AD1836_ADC_AUX; |
197 | ||
63b62ab0 | 198 | return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2); |
84549d23 BS |
199 | } |
200 | #else | |
201 | #define ad1836_soc_suspend NULL | |
202 | #define ad1836_soc_resume NULL | |
203 | #endif | |
204 | ||
7eaae41e BS |
205 | static int __devinit ad1836_spi_probe(struct spi_device *spi) |
206 | { | |
207 | struct snd_soc_codec *codec; | |
208 | struct ad1836_priv *ad1836; | |
209 | ||
210 | ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL); | |
211 | if (ad1836 == NULL) | |
212 | return -ENOMEM; | |
213 | ||
214 | codec = &ad1836->codec; | |
215 | codec->control_data = spi; | |
216 | codec->dev = &spi->dev; | |
217 | ||
218 | dev_set_drvdata(&spi->dev, ad1836); | |
219 | ||
220 | return ad1836_register(ad1836); | |
221 | } | |
222 | ||
223 | static int __devexit ad1836_spi_remove(struct spi_device *spi) | |
224 | { | |
225 | struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev); | |
226 | ||
227 | ad1836_unregister(ad1836); | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static struct spi_driver ad1836_spi_driver = { | |
232 | .driver = { | |
98235a4b | 233 | .name = "ad1836", |
7eaae41e BS |
234 | .owner = THIS_MODULE, |
235 | }, | |
236 | .probe = ad1836_spi_probe, | |
237 | .remove = __devexit_p(ad1836_spi_remove), | |
238 | }; | |
239 | ||
240 | static struct snd_soc_dai_ops ad1836_dai_ops = { | |
241 | .hw_params = ad1836_hw_params, | |
242 | .set_fmt = ad1836_set_dai_fmt, | |
243 | }; | |
244 | ||
245 | /* codec DAI instance */ | |
246 | struct snd_soc_dai ad1836_dai = { | |
247 | .name = "AD1836", | |
248 | .playback = { | |
249 | .stream_name = "Playback", | |
250 | .channels_min = 2, | |
251 | .channels_max = 6, | |
252 | .rates = SNDRV_PCM_RATE_48000, | |
253 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
254 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
255 | }, | |
256 | .capture = { | |
257 | .stream_name = "Capture", | |
258 | .channels_min = 2, | |
259 | .channels_max = 4, | |
260 | .rates = SNDRV_PCM_RATE_48000, | |
261 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
262 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
263 | }, | |
264 | .ops = &ad1836_dai_ops, | |
265 | }; | |
266 | EXPORT_SYMBOL_GPL(ad1836_dai); | |
267 | ||
268 | static int ad1836_register(struct ad1836_priv *ad1836) | |
269 | { | |
270 | int ret; | |
271 | struct snd_soc_codec *codec = &ad1836->codec; | |
272 | ||
273 | if (ad1836_codec) { | |
274 | dev_err(codec->dev, "Another ad1836 is registered\n"); | |
275 | return -EINVAL; | |
276 | } | |
277 | ||
278 | mutex_init(&codec->mutex); | |
279 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
280 | INIT_LIST_HEAD(&codec->dapm_paths); | |
281 | codec->private_data = ad1836; | |
282 | codec->reg_cache = ad1836->reg_cache; | |
283 | codec->reg_cache_size = AD1836_NUM_REGS; | |
284 | codec->name = "AD1836"; | |
285 | codec->owner = THIS_MODULE; | |
286 | codec->dai = &ad1836_dai; | |
287 | codec->num_dai = 1; | |
7eaae41e BS |
288 | INIT_LIST_HEAD(&codec->dapm_widgets); |
289 | INIT_LIST_HEAD(&codec->dapm_paths); | |
290 | ||
291 | ad1836_dai.dev = codec->dev; | |
292 | ad1836_codec = codec; | |
293 | ||
63b62ab0 BS |
294 | ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI); |
295 | if (ret < 0) { | |
296 | dev_err(codec->dev, "failed to set cache I/O: %d\n", | |
297 | ret); | |
298 | kfree(ad1836); | |
299 | return ret; | |
300 | } | |
301 | ||
7eaae41e BS |
302 | /* default setting for ad1836 */ |
303 | /* de-emphasis: 48kHz, power-on dac */ | |
63b62ab0 | 304 | snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300); |
7eaae41e | 305 | /* unmute dac channels */ |
63b62ab0 | 306 | snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0); |
7eaae41e | 307 | /* high-pass filter enable, power-on adc */ |
63b62ab0 | 308 | snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100); |
7eaae41e | 309 | /* unmute adc channles, adc aux mode */ |
63b62ab0 | 310 | snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180); |
7eaae41e | 311 | /* left/right diff:PGA/MUX */ |
63b62ab0 | 312 | snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A); |
7eaae41e | 313 | /* volume */ |
63b62ab0 BS |
314 | snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF); |
315 | snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF); | |
316 | snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF); | |
317 | snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF); | |
318 | snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF); | |
319 | snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF); | |
7eaae41e BS |
320 | |
321 | ret = snd_soc_register_codec(codec); | |
322 | if (ret != 0) { | |
323 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
324 | kfree(ad1836); | |
325 | return ret; | |
326 | } | |
327 | ||
328 | ret = snd_soc_register_dai(&ad1836_dai); | |
329 | if (ret != 0) { | |
330 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
331 | snd_soc_unregister_codec(codec); | |
332 | kfree(ad1836); | |
333 | return ret; | |
334 | } | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static void ad1836_unregister(struct ad1836_priv *ad1836) | |
340 | { | |
341 | snd_soc_unregister_dai(&ad1836_dai); | |
342 | snd_soc_unregister_codec(&ad1836->codec); | |
343 | kfree(ad1836); | |
344 | ad1836_codec = NULL; | |
345 | } | |
346 | ||
347 | static int ad1836_probe(struct platform_device *pdev) | |
348 | { | |
349 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
350 | struct snd_soc_codec *codec; | |
351 | int ret = 0; | |
352 | ||
353 | if (ad1836_codec == NULL) { | |
354 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
355 | return -ENODEV; | |
356 | } | |
357 | ||
358 | socdev->card->codec = ad1836_codec; | |
359 | codec = ad1836_codec; | |
360 | ||
361 | /* register pcms */ | |
362 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
363 | if (ret < 0) { | |
364 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
365 | goto pcm_err; | |
366 | } | |
367 | ||
368 | snd_soc_add_controls(codec, ad1836_snd_controls, | |
369 | ARRAY_SIZE(ad1836_snd_controls)); | |
370 | snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets, | |
371 | ARRAY_SIZE(ad1836_dapm_widgets)); | |
372 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); | |
7eaae41e | 373 | |
7eaae41e BS |
374 | pcm_err: |
375 | return ret; | |
376 | } | |
377 | ||
378 | /* power down chip */ | |
379 | static int ad1836_remove(struct platform_device *pdev) | |
380 | { | |
381 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
382 | ||
383 | snd_soc_free_pcms(socdev); | |
384 | snd_soc_dapm_free(socdev); | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | struct snd_soc_codec_device soc_codec_dev_ad1836 = { | |
390 | .probe = ad1836_probe, | |
391 | .remove = ad1836_remove, | |
84549d23 BS |
392 | .suspend = ad1836_soc_suspend, |
393 | .resume = ad1836_soc_resume, | |
7eaae41e BS |
394 | }; |
395 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); | |
396 | ||
397 | static int __init ad1836_init(void) | |
398 | { | |
399 | int ret; | |
400 | ||
401 | ret = spi_register_driver(&ad1836_spi_driver); | |
402 | if (ret != 0) { | |
403 | printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", | |
404 | ret); | |
405 | } | |
406 | ||
407 | return ret; | |
408 | } | |
409 | module_init(ad1836_init); | |
410 | ||
411 | static void __exit ad1836_exit(void) | |
412 | { | |
413 | spi_unregister_driver(&ad1836_spi_driver); | |
414 | } | |
415 | module_exit(ad1836_exit); | |
416 | ||
417 | MODULE_DESCRIPTION("ASoC ad1836 driver"); | |
418 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); | |
419 | MODULE_LICENSE("GPL"); |