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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> | |
20 | #include <linux/module.h> | |
21 | #include <linux/version.h> | |
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 | ||
175 | ||
176 | /* | |
177 | * interface to read/write ad1836 register | |
178 | */ | |
179 | #define AD1836_SPI_REG_SHFT 12 | |
180 | #define AD1836_SPI_READ (1 << 11) | |
181 | #define AD1836_SPI_VAL_MSK 0x3FF | |
182 | ||
183 | /* | |
184 | * write to the ad1836 register space | |
185 | */ | |
186 | ||
187 | static int ad1836_write_reg(struct snd_soc_codec *codec, unsigned int reg, | |
188 | unsigned int value) | |
189 | { | |
190 | u16 *reg_cache = codec->reg_cache; | |
191 | int ret = 0; | |
192 | ||
193 | if (value != reg_cache[reg]) { | |
194 | unsigned short buf; | |
195 | struct spi_transfer t = { | |
196 | .tx_buf = &buf, | |
197 | .len = 2, | |
198 | }; | |
199 | struct spi_message m; | |
200 | ||
201 | buf = (reg << AD1836_SPI_REG_SHFT) | | |
202 | (value & AD1836_SPI_VAL_MSK); | |
203 | spi_message_init(&m); | |
204 | spi_message_add_tail(&t, &m); | |
205 | ret = spi_sync(codec->control_data, &m); | |
206 | if (ret == 0) | |
207 | reg_cache[reg] = value; | |
208 | } | |
209 | ||
210 | return ret; | |
211 | } | |
212 | ||
213 | /* | |
214 | * read from the ad1836 register space cache | |
215 | */ | |
216 | static unsigned int ad1836_read_reg_cache(struct snd_soc_codec *codec, | |
217 | unsigned int reg) | |
218 | { | |
219 | u16 *reg_cache = codec->reg_cache; | |
220 | ||
221 | if (reg >= codec->reg_cache_size) | |
222 | return -EINVAL; | |
223 | ||
224 | return reg_cache[reg]; | |
225 | } | |
226 | ||
227 | static int __devinit ad1836_spi_probe(struct spi_device *spi) | |
228 | { | |
229 | struct snd_soc_codec *codec; | |
230 | struct ad1836_priv *ad1836; | |
231 | ||
232 | ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL); | |
233 | if (ad1836 == NULL) | |
234 | return -ENOMEM; | |
235 | ||
236 | codec = &ad1836->codec; | |
237 | codec->control_data = spi; | |
238 | codec->dev = &spi->dev; | |
239 | ||
240 | dev_set_drvdata(&spi->dev, ad1836); | |
241 | ||
242 | return ad1836_register(ad1836); | |
243 | } | |
244 | ||
245 | static int __devexit ad1836_spi_remove(struct spi_device *spi) | |
246 | { | |
247 | struct ad1836_priv *ad1836 = dev_get_drvdata(&spi->dev); | |
248 | ||
249 | ad1836_unregister(ad1836); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static struct spi_driver ad1836_spi_driver = { | |
254 | .driver = { | |
255 | .name = "ad1836-spi", | |
256 | .bus = &spi_bus_type, | |
257 | .owner = THIS_MODULE, | |
258 | }, | |
259 | .probe = ad1836_spi_probe, | |
260 | .remove = __devexit_p(ad1836_spi_remove), | |
261 | }; | |
262 | ||
263 | static struct snd_soc_dai_ops ad1836_dai_ops = { | |
264 | .hw_params = ad1836_hw_params, | |
265 | .set_fmt = ad1836_set_dai_fmt, | |
266 | }; | |
267 | ||
268 | /* codec DAI instance */ | |
269 | struct snd_soc_dai ad1836_dai = { | |
270 | .name = "AD1836", | |
271 | .playback = { | |
272 | .stream_name = "Playback", | |
273 | .channels_min = 2, | |
274 | .channels_max = 6, | |
275 | .rates = SNDRV_PCM_RATE_48000, | |
276 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
277 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
278 | }, | |
279 | .capture = { | |
280 | .stream_name = "Capture", | |
281 | .channels_min = 2, | |
282 | .channels_max = 4, | |
283 | .rates = SNDRV_PCM_RATE_48000, | |
284 | .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE | | |
285 | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE, | |
286 | }, | |
287 | .ops = &ad1836_dai_ops, | |
288 | }; | |
289 | EXPORT_SYMBOL_GPL(ad1836_dai); | |
290 | ||
291 | static int ad1836_register(struct ad1836_priv *ad1836) | |
292 | { | |
293 | int ret; | |
294 | struct snd_soc_codec *codec = &ad1836->codec; | |
295 | ||
296 | if (ad1836_codec) { | |
297 | dev_err(codec->dev, "Another ad1836 is registered\n"); | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | mutex_init(&codec->mutex); | |
302 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
303 | INIT_LIST_HEAD(&codec->dapm_paths); | |
304 | codec->private_data = ad1836; | |
305 | codec->reg_cache = ad1836->reg_cache; | |
306 | codec->reg_cache_size = AD1836_NUM_REGS; | |
307 | codec->name = "AD1836"; | |
308 | codec->owner = THIS_MODULE; | |
309 | codec->dai = &ad1836_dai; | |
310 | codec->num_dai = 1; | |
311 | codec->write = ad1836_write_reg; | |
312 | codec->read = ad1836_read_reg_cache; | |
313 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
314 | INIT_LIST_HEAD(&codec->dapm_paths); | |
315 | ||
316 | ad1836_dai.dev = codec->dev; | |
317 | ad1836_codec = codec; | |
318 | ||
319 | /* default setting for ad1836 */ | |
320 | /* de-emphasis: 48kHz, power-on dac */ | |
321 | codec->write(codec, AD1836_DAC_CTRL1, 0x300); | |
322 | /* unmute dac channels */ | |
323 | codec->write(codec, AD1836_DAC_CTRL2, 0x0); | |
324 | /* high-pass filter enable, power-on adc */ | |
325 | codec->write(codec, AD1836_ADC_CTRL1, 0x100); | |
326 | /* unmute adc channles, adc aux mode */ | |
327 | codec->write(codec, AD1836_ADC_CTRL2, 0x180); | |
328 | /* left/right diff:PGA/MUX */ | |
329 | codec->write(codec, AD1836_ADC_CTRL3, 0x3A); | |
330 | /* volume */ | |
331 | codec->write(codec, AD1836_DAC_L1_VOL, 0x3FF); | |
332 | codec->write(codec, AD1836_DAC_R1_VOL, 0x3FF); | |
333 | codec->write(codec, AD1836_DAC_L2_VOL, 0x3FF); | |
334 | codec->write(codec, AD1836_DAC_R2_VOL, 0x3FF); | |
335 | codec->write(codec, AD1836_DAC_L3_VOL, 0x3FF); | |
336 | codec->write(codec, AD1836_DAC_R3_VOL, 0x3FF); | |
337 | ||
338 | ret = snd_soc_register_codec(codec); | |
339 | if (ret != 0) { | |
340 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
341 | kfree(ad1836); | |
342 | return ret; | |
343 | } | |
344 | ||
345 | ret = snd_soc_register_dai(&ad1836_dai); | |
346 | if (ret != 0) { | |
347 | dev_err(codec->dev, "Failed to register DAI: %d\n", ret); | |
348 | snd_soc_unregister_codec(codec); | |
349 | kfree(ad1836); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | static void ad1836_unregister(struct ad1836_priv *ad1836) | |
357 | { | |
358 | snd_soc_unregister_dai(&ad1836_dai); | |
359 | snd_soc_unregister_codec(&ad1836->codec); | |
360 | kfree(ad1836); | |
361 | ad1836_codec = NULL; | |
362 | } | |
363 | ||
364 | static int ad1836_probe(struct platform_device *pdev) | |
365 | { | |
366 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
367 | struct snd_soc_codec *codec; | |
368 | int ret = 0; | |
369 | ||
370 | if (ad1836_codec == NULL) { | |
371 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
372 | return -ENODEV; | |
373 | } | |
374 | ||
375 | socdev->card->codec = ad1836_codec; | |
376 | codec = ad1836_codec; | |
377 | ||
378 | /* register pcms */ | |
379 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
380 | if (ret < 0) { | |
381 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
382 | goto pcm_err; | |
383 | } | |
384 | ||
385 | snd_soc_add_controls(codec, ad1836_snd_controls, | |
386 | ARRAY_SIZE(ad1836_snd_controls)); | |
387 | snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets, | |
388 | ARRAY_SIZE(ad1836_dapm_widgets)); | |
389 | snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths)); | |
390 | snd_soc_dapm_new_widgets(codec); | |
391 | ||
392 | ret = snd_soc_init_card(socdev); | |
393 | if (ret < 0) { | |
394 | dev_err(codec->dev, "failed to register card: %d\n", ret); | |
395 | goto card_err; | |
396 | } | |
397 | ||
398 | return ret; | |
399 | ||
400 | card_err: | |
401 | snd_soc_free_pcms(socdev); | |
402 | snd_soc_dapm_free(socdev); | |
403 | pcm_err: | |
404 | return ret; | |
405 | } | |
406 | ||
407 | /* power down chip */ | |
408 | static int ad1836_remove(struct platform_device *pdev) | |
409 | { | |
410 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
411 | ||
412 | snd_soc_free_pcms(socdev); | |
413 | snd_soc_dapm_free(socdev); | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | struct snd_soc_codec_device soc_codec_dev_ad1836 = { | |
419 | .probe = ad1836_probe, | |
420 | .remove = ad1836_remove, | |
7eaae41e BS |
421 | }; |
422 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); | |
423 | ||
424 | static int __init ad1836_init(void) | |
425 | { | |
426 | int ret; | |
427 | ||
428 | ret = spi_register_driver(&ad1836_spi_driver); | |
429 | if (ret != 0) { | |
430 | printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", | |
431 | ret); | |
432 | } | |
433 | ||
434 | return ret; | |
435 | } | |
436 | module_init(ad1836_init); | |
437 | ||
438 | static void __exit ad1836_exit(void) | |
439 | { | |
440 | spi_unregister_driver(&ad1836_spi_driver); | |
441 | } | |
442 | module_exit(ad1836_exit); | |
443 | ||
444 | MODULE_DESCRIPTION("ASoC ad1836 driver"); | |
445 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); | |
446 | MODULE_LICENSE("GPL"); |