diff options
Diffstat (limited to 'sound/soc/codecs/ad1836.c')
-rw-r--r-- | sound/soc/codecs/ad1836.c | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/sound/soc/codecs/ad1836.c b/sound/soc/codecs/ad1836.c new file mode 100644 index 000000000000..c48485f2c55d --- /dev/null +++ b/sound/soc/codecs/ad1836.c | |||
@@ -0,0 +1,444 @@ | |||
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> | ||
20 | #include <linux/module.h> | ||
21 | #include <linux/kernel.h> | ||
22 | #include <linux/device.h> | ||
23 | #include <sound/core.h> | ||
24 | #include <sound/pcm.h> | ||
25 | #include <sound/pcm_params.h> | ||
26 | #include <sound/initval.h> | ||
27 | #include <sound/soc.h> | ||
28 | #include <sound/tlv.h> | ||
29 | #include <sound/soc-dapm.h> | ||
30 | #include <linux/spi/spi.h> | ||
31 | #include "ad1836.h" | ||
32 | |||
33 | /* codec private data */ | ||
34 | struct ad1836_priv { | ||
35 | struct snd_soc_codec codec; | ||
36 | u16 reg_cache[AD1836_NUM_REGS]; | ||
37 | }; | ||
38 | |||
39 | static struct snd_soc_codec *ad1836_codec; | ||
40 | struct snd_soc_codec_device soc_codec_dev_ad1836; | ||
41 | static int ad1836_register(struct ad1836_priv *ad1836); | ||
42 | static void ad1836_unregister(struct ad1836_priv *ad1836); | ||
43 | |||
44 | /* | ||
45 | * AD1836 volume/mute/de-emphasis etc. controls | ||
46 | */ | ||
47 | static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"}; | ||
48 | |||
49 | static const struct soc_enum ad1836_deemp_enum = | ||
50 | SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp); | ||
51 | |||
52 | static const struct snd_kcontrol_new ad1836_snd_controls[] = { | ||
53 | /* DAC volume control */ | ||
54 | SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL, | ||
55 | AD1836_DAC_R1_VOL, 0, 0x3FF, 0), | ||
56 | SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL, | ||
57 | AD1836_DAC_R2_VOL, 0, 0x3FF, 0), | ||
58 | SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL, | ||
59 | AD1836_DAC_R3_VOL, 0, 0x3FF, 0), | ||
60 | |||
61 | /* ADC switch control */ | ||
62 | SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE, | ||
63 | AD1836_ADCR1_MUTE, 1, 1), | ||
64 | SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE, | ||
65 | AD1836_ADCR2_MUTE, 1, 1), | ||
66 | |||
67 | /* DAC switch control */ | ||
68 | SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE, | ||
69 | AD1836_DACR1_MUTE, 1, 1), | ||
70 | SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE, | ||
71 | AD1836_DACR2_MUTE, 1, 1), | ||
72 | SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE, | ||
73 | AD1836_DACR3_MUTE, 1, 1), | ||
74 | |||
75 | /* ADC high-pass filter */ | ||
76 | SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1, | ||
77 | AD1836_ADC_HIGHPASS_FILTER, 1, 0), | ||
78 | |||
79 | /* DAC de-emphasis */ | ||
80 | SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum), | ||
81 | }; | ||
82 | |||
83 | static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = { | ||
84 | SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1, | ||
85 | AD1836_DAC_POWERDOWN, 1), | ||
86 | SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0), | ||
87 | SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1, | ||
88 | AD1836_ADC_POWERDOWN, 1, NULL, 0), | ||
89 | SND_SOC_DAPM_OUTPUT("DAC1OUT"), | ||
90 | SND_SOC_DAPM_OUTPUT("DAC2OUT"), | ||
91 | SND_SOC_DAPM_OUTPUT("DAC3OUT"), | ||
92 | SND_SOC_DAPM_INPUT("ADC1IN"), | ||
93 | SND_SOC_DAPM_INPUT("ADC2IN"), | ||
94 | }; | ||
95 | |||
96 | static const struct snd_soc_dapm_route audio_paths[] = { | ||
97 | { "DAC", NULL, "ADC_PWR" }, | ||
98 | { "ADC", NULL, "ADC_PWR" }, | ||
99 | { "DAC1OUT", "DAC1 Switch", "DAC" }, | ||
100 | { "DAC2OUT", "DAC2 Switch", "DAC" }, | ||
101 | { "DAC3OUT", "DAC3 Switch", "DAC" }, | ||
102 | { "ADC", "ADC1 Switch", "ADC1IN" }, | ||
103 | { "ADC", "ADC2 Switch", "ADC2IN" }, | ||
104 | }; | ||
105 | |||
106 | /* | ||
107 | * DAI ops entries | ||
108 | */ | ||
109 | |||
110 | static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai, | ||
111 | unsigned int fmt) | ||
112 | { | ||
113 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | ||
114 | /* at present, we support adc aux mode to interface with | ||
115 | * blackfin sport tdm mode | ||
116 | */ | ||
117 | case SND_SOC_DAIFMT_DSP_A: | ||
118 | break; | ||
119 | default: | ||
120 | return -EINVAL; | ||
121 | } | ||
122 | |||
123 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | ||
124 | case SND_SOC_DAIFMT_IB_IF: | ||
125 | break; | ||
126 | default: | ||
127 | return -EINVAL; | ||
128 | } | ||
129 | |||
130 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | ||
131 | /* ALCLK,ABCLK are both output, AD1836 can only be master */ | ||
132 | case SND_SOC_DAIFMT_CBM_CFM: | ||
133 | break; | ||
134 | default: | ||
135 | return -EINVAL; | ||
136 | } | ||
137 | |||
138 | return 0; | ||
139 | } | ||
140 | |||
141 | static int ad1836_hw_params(struct snd_pcm_substream *substream, | ||
142 | struct snd_pcm_hw_params *params, | ||
143 | struct snd_soc_dai *dai) | ||
144 | { | ||
145 | int word_len = 0; | ||
146 | |||
147 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
148 | struct snd_soc_device *socdev = rtd->socdev; | ||
149 | struct snd_soc_codec *codec = socdev->card->codec; | ||
150 | |||
151 | /* bit size */ | ||
152 | switch (params_format(params)) { | ||
153 | case SNDRV_PCM_FORMAT_S16_LE: | ||
154 | word_len = 3; | ||
155 | break; | ||
156 | case SNDRV_PCM_FORMAT_S20_3LE: | ||
157 | word_len = 1; | ||
158 | break; | ||
159 | case SNDRV_PCM_FORMAT_S24_LE: | ||
160 | case SNDRV_PCM_FORMAT_S32_LE: | ||
161 | word_len = 0; | ||
162 | break; | ||
163 | } | ||
164 | |||
165 | snd_soc_update_bits(codec, AD1836_DAC_CTRL1, | ||
166 | AD1836_DAC_WORD_LEN_MASK, word_len); | ||
167 | |||
168 | snd_soc_update_bits(codec, AD1836_ADC_CTRL2, | ||
169 | AD1836_ADC_WORD_LEN_MASK, word_len); | ||
170 | |||
171 | return 0; | ||
172 | } | ||
173 | |||
174 | |||
175 | /* | ||
176 | * interface to read/write ad1836 register | ||
177 | */ | ||
178 | #define AD1836_SPI_REG_SHFT 12 | ||
179 | #define AD1836_SPI_READ (1 << 11) | ||
180 | #define AD1836_SPI_VAL_MSK 0x3FF | ||
181 | |||
182 | /* | ||
183 | * write to the ad1836 register space | ||
184 | */ | ||
185 | |||
186 | static int ad1836_write_reg(struct snd_soc_codec *codec, unsigned int reg, | ||
187 | unsigned int value) | ||
188 | { | ||
189 | u16 *reg_cache = codec->reg_cache; | ||
190 | int ret = 0; | ||
191 | |||
192 | if (value != reg_cache[reg]) { | ||
193 | unsigned short buf; | ||
194 | struct spi_transfer t = { | ||
195 | .tx_buf = &buf, | ||
196 | .len = 2, | ||
197 | }; | ||
198 | struct spi_message m; | ||
199 | |||
200 | buf = (reg << AD1836_SPI_REG_SHFT) | | ||
201 | (value & AD1836_SPI_VAL_MSK); | ||
202 | spi_message_init(&m); | ||
203 | spi_message_add_tail(&t, &m); | ||
204 | ret = spi_sync(codec->control_data, &m); | ||
205 | if (ret == 0) | ||
206 | reg_cache[reg] = value; | ||
207 | } | ||
208 | |||
209 | return ret; | ||
210 | } | ||
211 | |||
212 | /* | ||
213 | * read from the ad1836 register space cache | ||
214 | */ | ||
215 | static unsigned int ad1836_read_reg_cache(struct snd_soc_codec *codec, | ||
216 | unsigned int reg) | ||
217 | { | ||
218 | u16 *reg_cache = codec->reg_cache; | ||
219 | |||
220 | if (reg >= codec->reg_cache_size) | ||
221 | return -EINVAL; | ||
222 | |||
223 | return reg_cache[reg]; | ||
224 | } | ||
225 | |||
226 | static int __devinit ad1836_spi_probe(struct spi_device *spi) | ||
227 | { | ||
228 | struct snd_soc_codec *codec; | ||
229 | struct ad1836_priv *ad1836; | ||
230 | |||
231 | ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL); | ||
232 | if (ad1836 == NULL) | ||
233 | return -ENOMEM; | ||
234 | |||
235 | codec = &ad1836->codec; | ||
236 | codec->control_data = spi; | ||
237 | codec->dev = &spi->dev; | ||
238 | |||
239 | dev_set_drvdata(&spi->dev, ad1836); | ||
240 | |||
241 | return ad1836_register(ad1836); | ||
242 | } | ||
243 | |||
244 | static int __devexit ad1836_spi_remove(struct spi_device *spi) | ||
245 | { | ||
246 | struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev); | ||
247 | |||
248 | ad1836_unregister(ad1836); | ||
249 | return 0; | ||
250 | } | ||
251 | |||
252 | static struct spi_driver ad1836_spi_driver = { | ||
253 | .driver = { | ||
254 | .name = "ad1836", | ||
255 | .owner = THIS_MODULE, | ||
256 | }, | ||
257 | .probe = ad1836_spi_probe, | ||
258 | .remove = __devexit_p(ad1836_spi_remove), | ||
259 | }; | ||
260 | |||
261 | static struct snd_soc_dai_ops ad1836_dai_ops = { | ||
262 | .hw_params = ad1836_hw_params, | ||
263 | .set_fmt = ad1836_set_dai_fmt, | ||
264 | }; | ||
265 | |||
266 | /* codec DAI instance */ | ||
267 | struct snd_soc_dai ad1836_dai = { | ||
268 | .name = "AD1836", | ||
269 | .playback = { | ||
270 | .stream_name = "Playback", | ||
271 | .channels_min = 2, | ||
272 | .channels_max = 6, | ||
273 | .rates = SNDRV_PCM_RATE_48000, | ||
274 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | ||
275 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | ||
276 | }, | ||
277 | .capture = { | ||
278 | .stream_name = "Capture", | ||
279 | .channels_min = 2, | ||
280 | .channels_max = 4, | ||
281 | .rates = SNDRV_PCM_RATE_48000, | ||
282 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | ||
283 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | ||
284 | }, | ||
285 | .ops = &ad1836_dai_ops, | ||
286 | }; | ||
287 | EXPORT_SYMBOL_GPL(ad1836_dai); | ||
288 | |||
289 | static int ad1836_register(struct ad1836_priv *ad1836) | ||
290 | { | ||
291 | int ret; | ||
292 | struct snd_soc_codec *codec = &ad1836->codec; | ||
293 | |||
294 | if (ad1836_codec) { | ||
295 | dev_err(codec->dev, "Another ad1836 is registered\n"); | ||
296 | return -EINVAL; | ||
297 | } | ||
298 | |||
299 | mutex_init(&codec->mutex); | ||
300 | INIT_LIST_HEAD(&codec->dapm_widgets); | ||
301 | INIT_LIST_HEAD(&codec->dapm_paths); | ||
302 | codec->private_data = ad1836; | ||
303 | codec->reg_cache = ad1836->reg_cache; | ||
304 | codec->reg_cache_size = AD1836_NUM_REGS; | ||
305 | codec->name = "AD1836"; | ||
306 | codec->owner = THIS_MODULE; | ||
307 | codec->dai = &ad1836_dai; | ||
308 | codec->num_dai = 1; | ||
309 | codec->write = ad1836_write_reg; | ||
310 | codec->read = ad1836_read_reg_cache; | ||
311 | INIT_LIST_HEAD(&codec->dapm_widgets); | ||
312 | INIT_LIST_HEAD(&codec->dapm_paths); | ||
313 | |||
314 | ad1836_dai.dev = codec->dev; | ||
315 | ad1836_codec = codec; | ||
316 | |||
317 | /* default setting for ad1836 */ | ||
318 | /* de-emphasis: 48kHz, power-on dac */ | ||
319 | codec->write(codec, AD1836_DAC_CTRL1, 0x300); | ||
320 | /* unmute dac channels */ | ||
321 | codec->write(codec, AD1836_DAC_CTRL2, 0x0); | ||
322 | /* high-pass filter enable, power-on adc */ | ||
323 | codec->write(codec, AD1836_ADC_CTRL1, 0x100); | ||
324 | /* unmute adc channles, adc aux mode */ | ||
325 | codec->write(codec, AD1836_ADC_CTRL2, 0x180); | ||
326 | /* left/right diff:PGA/MUX */ | ||
327 | codec->write(codec, AD1836_ADC_CTRL3, 0x3A); | ||
328 | /* volume */ | ||
329 | codec->write(codec, AD1836_DAC_L1_VOL, 0x3FF); | ||
330 | codec->write(codec, AD1836_DAC_R1_VOL, 0x3FF); | ||
331 | codec->write(codec, AD1836_DAC_L2_VOL, 0x3FF); | ||
332 | codec->write(codec, AD1836_DAC_R2_VOL, 0x3FF); | ||
333 | codec->write(codec, AD1836_DAC_L3_VOL, 0x3FF); | ||
334 | codec->write(codec, AD1836_DAC_R3_VOL, 0x3FF); | ||
335 | |||
336 | ret = snd_soc_register_codec(codec); | ||
337 | if (ret != 0) { | ||
338 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | ||
339 | kfree(ad1836); | ||
340 | return ret; | ||
341 | } | ||
342 | |||
343 | ret = snd_soc_register_dai(&ad1836_dai); | ||
344 | if (ret != 0) { | ||
345 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | ||
346 | snd_soc_unregister_codec(codec); | ||
347 | kfree(ad1836); | ||
348 | return ret; | ||
349 | } | ||
350 | |||
351 | return 0; | ||
352 | } | ||
353 | |||
354 | static void ad1836_unregister(struct ad1836_priv *ad1836) | ||
355 | { | ||
356 | snd_soc_unregister_dai(&ad1836_dai); | ||
357 | snd_soc_unregister_codec(&ad1836->codec); | ||
358 | kfree(ad1836); | ||
359 | ad1836_codec = NULL; | ||
360 | } | ||
361 | |||
362 | static int ad1836_probe(struct platform_device *pdev) | ||
363 | { | ||
364 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | ||
365 | struct snd_soc_codec *codec; | ||
366 | int ret = 0; | ||
367 | |||
368 | if (ad1836_codec == NULL) { | ||
369 | dev_err(&pdev->dev, "Codec device not registered\n"); | ||
370 | return -ENODEV; | ||
371 | } | ||
372 | |||
373 | socdev->card->codec = ad1836_codec; | ||
374 | codec = ad1836_codec; | ||
375 | |||
376 | /* register pcms */ | ||
377 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | ||
378 | if (ret < 0) { | ||
379 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | ||
380 | goto pcm_err; | ||
381 | } | ||
382 | |||
383 | snd_soc_add_controls(codec, ad1836_snd_controls, | ||
384 | ARRAY_SIZE(ad1836_snd_controls)); | ||
385 | snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets, | ||
386 | ARRAY_SIZE(ad1836_dapm_widgets)); | ||
387 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); | ||
388 | snd_soc_dapm_new_widgets(codec); | ||
389 | |||
390 | ret = snd_soc_init_card(socdev); | ||
391 | if (ret < 0) { | ||
392 | dev_err(codec->dev, "failed to register card: %d\n", ret); | ||
393 | goto card_err; | ||
394 | } | ||
395 | |||
396 | return ret; | ||
397 | |||
398 | card_err: | ||
399 | snd_soc_free_pcms(socdev); | ||
400 | snd_soc_dapm_free(socdev); | ||
401 | pcm_err: | ||
402 | return ret; | ||
403 | } | ||
404 | |||
405 | /* power down chip */ | ||
406 | static int ad1836_remove(struct platform_device *pdev) | ||
407 | { | ||
408 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | ||
409 | |||
410 | snd_soc_free_pcms(socdev); | ||
411 | snd_soc_dapm_free(socdev); | ||
412 | |||
413 | return 0; | ||
414 | } | ||
415 | |||
416 | struct snd_soc_codec_device soc_codec_dev_ad1836 = { | ||
417 | .probe = ad1836_probe, | ||
418 | .remove = ad1836_remove, | ||
419 | }; | ||
420 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); | ||
421 | |||
422 | static int __init ad1836_init(void) | ||
423 | { | ||
424 | int ret; | ||
425 | |||
426 | ret = spi_register_driver(&ad1836_spi_driver); | ||
427 | if (ret != 0) { | ||
428 | printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", | ||
429 | ret); | ||
430 | } | ||
431 | |||
432 | return ret; | ||
433 | } | ||
434 | module_init(ad1836_init); | ||
435 | |||
436 | static void __exit ad1836_exit(void) | ||
437 | { | ||
438 | spi_unregister_driver(&ad1836_spi_driver); | ||
439 | } | ||
440 | module_exit(ad1836_exit); | ||
441 | |||
442 | MODULE_DESCRIPTION("ASoC ad1836 driver"); | ||
443 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); | ||
444 | MODULE_LICENSE("GPL"); | ||