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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> | |
7eaae41e BS |
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 = { | |
98235a4b | 254 | .name = "ad1836", |
7eaae41e BS |
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)); | |
7eaae41e | 388 | |
7eaae41e BS |
389 | pcm_err: |
390 | return ret; | |
391 | } | |
392 | ||
393 | /* power down chip */ | |
394 | static int ad1836_remove(struct platform_device *pdev) | |
395 | { | |
396 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
397 | ||
398 | snd_soc_free_pcms(socdev); | |
399 | snd_soc_dapm_free(socdev); | |
400 | ||
401 | return 0; | |
402 | } | |
403 | ||
404 | struct snd_soc_codec_device soc_codec_dev_ad1836 = { | |
405 | .probe = ad1836_probe, | |
406 | .remove = ad1836_remove, | |
7eaae41e BS |
407 | }; |
408 | EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836); | |
409 | ||
410 | static int __init ad1836_init(void) | |
411 | { | |
412 | int ret; | |
413 | ||
414 | ret = spi_register_driver(&ad1836_spi_driver); | |
415 | if (ret != 0) { | |
416 | printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n", | |
417 | ret); | |
418 | } | |
419 | ||
420 | return ret; | |
421 | } | |
422 | module_init(ad1836_init); | |
423 | ||
424 | static void __exit ad1836_exit(void) | |
425 | { | |
426 | spi_unregister_driver(&ad1836_spi_driver); | |
427 | } | |
428 | module_exit(ad1836_exit); | |
429 | ||
430 | MODULE_DESCRIPTION("ASoC ad1836 driver"); | |
431 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); | |
432 | MODULE_LICENSE("GPL"); |