2 * File: sound/soc/codecs/ad1836.c
3 * Author: Barry Song <Barry.Song@analog.com>
6 * Description: Driver for AD1836 sound chip
9 * Copyright 2009 Analog Devices Inc.
11 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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>
33 /* codec private data */
35 struct snd_soc_codec codec
;
36 u16 reg_cache
[AD1836_NUM_REGS
];
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
);
45 * AD1836 volume/mute/de-emphasis etc. controls
47 static const char *ad1836_deemp
[] = {"None", "44.1kHz", "32kHz", "48kHz"};
49 static const struct soc_enum ad1836_deemp_enum
=
50 SOC_ENUM_SINGLE(AD1836_DAC_CTRL1
, 8, 4, ad1836_deemp
);
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),
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),
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),
75 /* ADC high-pass filter */
76 SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1
,
77 AD1836_ADC_HIGHPASS_FILTER
, 1, 0),
80 SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum
),
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"),
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" },
110 static int ad1836_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
113 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
114 /* at present, we support adc aux mode to interface with
115 * blackfin sport tdm mode
117 case SND_SOC_DAIFMT_DSP_A
:
123 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
124 case SND_SOC_DAIFMT_IB_IF
:
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
:
141 static int ad1836_hw_params(struct snd_pcm_substream
*substream
,
142 struct snd_pcm_hw_params
*params
,
143 struct snd_soc_dai
*dai
)
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
;
152 switch (params_format(params
)) {
153 case SNDRV_PCM_FORMAT_S16_LE
:
156 case SNDRV_PCM_FORMAT_S20_3LE
:
159 case SNDRV_PCM_FORMAT_S24_LE
:
160 case SNDRV_PCM_FORMAT_S32_LE
:
165 snd_soc_update_bits(codec
, AD1836_DAC_CTRL1
,
166 AD1836_DAC_WORD_LEN_MASK
, word_len
);
168 snd_soc_update_bits(codec
, AD1836_ADC_CTRL2
,
169 AD1836_ADC_WORD_LEN_MASK
, word_len
);
175 static int ad1836_soc_suspend(struct platform_device
*pdev
,
178 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
179 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
181 /* reset clock control mode */
182 u16 adc_ctrl2
= snd_soc_read(codec
, AD1836_ADC_CTRL2
);
183 adc_ctrl2
&= ~AD1836_ADC_SERFMT_MASK
;
185 return snd_soc_write(codec
, AD1836_ADC_CTRL2
, adc_ctrl2
);
188 static int ad1836_soc_resume(struct platform_device
*pdev
)
190 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
191 struct snd_soc_codec
*codec
= socdev
->card
->codec
;
193 /* restore clock control mode */
194 u16 adc_ctrl2
= snd_soc_read(codec
, AD1836_ADC_CTRL2
);
195 adc_ctrl2
|= AD1836_ADC_AUX
;
197 return snd_soc_write(codec
, AD1836_ADC_CTRL2
, adc_ctrl2
);
200 #define ad1836_soc_suspend NULL
201 #define ad1836_soc_resume NULL
204 static int __devinit
ad1836_spi_probe(struct spi_device
*spi
)
206 struct snd_soc_codec
*codec
;
207 struct ad1836_priv
*ad1836
;
209 ad1836
= kzalloc(sizeof(struct ad1836_priv
), GFP_KERNEL
);
213 codec
= &ad1836
->codec
;
214 codec
->control_data
= spi
;
215 codec
->dev
= &spi
->dev
;
217 dev_set_drvdata(&spi
->dev
, ad1836
);
219 return ad1836_register(ad1836
);
222 static int __devexit
ad1836_spi_remove(struct spi_device
*spi
)
224 struct ad1836_priv
*ad1836
= dev_get_drvdata(&spi
->dev
);
226 ad1836_unregister(ad1836
);
230 static struct spi_driver ad1836_spi_driver
= {
233 .owner
= THIS_MODULE
,
235 .probe
= ad1836_spi_probe
,
236 .remove
= __devexit_p(ad1836_spi_remove
),
239 static struct snd_soc_dai_ops ad1836_dai_ops
= {
240 .hw_params
= ad1836_hw_params
,
241 .set_fmt
= ad1836_set_dai_fmt
,
244 /* codec DAI instance */
245 struct snd_soc_dai ad1836_dai
= {
248 .stream_name
= "Playback",
251 .rates
= SNDRV_PCM_RATE_48000
,
252 .formats
= SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S16_LE
|
253 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S24_LE
,
256 .stream_name
= "Capture",
259 .rates
= SNDRV_PCM_RATE_48000
,
260 .formats
= SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S16_LE
|
261 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S24_LE
,
263 .ops
= &ad1836_dai_ops
,
265 EXPORT_SYMBOL_GPL(ad1836_dai
);
267 static int ad1836_register(struct ad1836_priv
*ad1836
)
270 struct snd_soc_codec
*codec
= &ad1836
->codec
;
273 dev_err(codec
->dev
, "Another ad1836 is registered\n");
277 mutex_init(&codec
->mutex
);
278 INIT_LIST_HEAD(&codec
->dapm_widgets
);
279 INIT_LIST_HEAD(&codec
->dapm_paths
);
280 codec
->private_data
= ad1836
;
281 codec
->reg_cache
= ad1836
->reg_cache
;
282 codec
->reg_cache_size
= AD1836_NUM_REGS
;
283 codec
->name
= "AD1836";
284 codec
->owner
= THIS_MODULE
;
285 codec
->dai
= &ad1836_dai
;
287 INIT_LIST_HEAD(&codec
->dapm_widgets
);
288 INIT_LIST_HEAD(&codec
->dapm_paths
);
290 ad1836_dai
.dev
= codec
->dev
;
291 ad1836_codec
= codec
;
293 ret
= snd_soc_codec_set_cache_io(codec
, 4, 12, SND_SOC_SPI
);
295 dev_err(codec
->dev
, "failed to set cache I/O: %d\n",
301 /* default setting for ad1836 */
302 /* de-emphasis: 48kHz, power-on dac */
303 snd_soc_write(codec
, AD1836_DAC_CTRL1
, 0x300);
304 /* unmute dac channels */
305 snd_soc_write(codec
, AD1836_DAC_CTRL2
, 0x0);
306 /* high-pass filter enable, power-on adc */
307 snd_soc_write(codec
, AD1836_ADC_CTRL1
, 0x100);
308 /* unmute adc channles, adc aux mode */
309 snd_soc_write(codec
, AD1836_ADC_CTRL2
, 0x180);
310 /* left/right diff:PGA/MUX */
311 snd_soc_write(codec
, AD1836_ADC_CTRL3
, 0x3A);
313 snd_soc_write(codec
, AD1836_DAC_L1_VOL
, 0x3FF);
314 snd_soc_write(codec
, AD1836_DAC_R1_VOL
, 0x3FF);
315 snd_soc_write(codec
, AD1836_DAC_L2_VOL
, 0x3FF);
316 snd_soc_write(codec
, AD1836_DAC_R2_VOL
, 0x3FF);
317 snd_soc_write(codec
, AD1836_DAC_L3_VOL
, 0x3FF);
318 snd_soc_write(codec
, AD1836_DAC_R3_VOL
, 0x3FF);
320 ret
= snd_soc_register_codec(codec
);
322 dev_err(codec
->dev
, "Failed to register codec: %d\n", ret
);
327 ret
= snd_soc_register_dai(&ad1836_dai
);
329 dev_err(codec
->dev
, "Failed to register DAI: %d\n", ret
);
330 snd_soc_unregister_codec(codec
);
338 static void ad1836_unregister(struct ad1836_priv
*ad1836
)
340 snd_soc_unregister_dai(&ad1836_dai
);
341 snd_soc_unregister_codec(&ad1836
->codec
);
346 static int ad1836_probe(struct platform_device
*pdev
)
348 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
349 struct snd_soc_codec
*codec
;
352 if (ad1836_codec
== NULL
) {
353 dev_err(&pdev
->dev
, "Codec device not registered\n");
357 socdev
->card
->codec
= ad1836_codec
;
358 codec
= ad1836_codec
;
361 ret
= snd_soc_new_pcms(socdev
, SNDRV_DEFAULT_IDX1
, SNDRV_DEFAULT_STR1
);
363 dev_err(codec
->dev
, "failed to create pcms: %d\n", ret
);
367 snd_soc_add_controls(codec
, ad1836_snd_controls
,
368 ARRAY_SIZE(ad1836_snd_controls
));
369 snd_soc_dapm_new_controls(codec
, ad1836_dapm_widgets
,
370 ARRAY_SIZE(ad1836_dapm_widgets
));
371 snd_soc_dapm_add_routes(codec
, audio_paths
, ARRAY_SIZE(audio_paths
));
377 /* power down chip */
378 static int ad1836_remove(struct platform_device
*pdev
)
380 struct snd_soc_device
*socdev
= platform_get_drvdata(pdev
);
382 snd_soc_free_pcms(socdev
);
383 snd_soc_dapm_free(socdev
);
388 struct snd_soc_codec_device soc_codec_dev_ad1836
= {
389 .probe
= ad1836_probe
,
390 .remove
= ad1836_remove
,
391 .suspend
= ad1836_soc_suspend
,
392 .resume
= ad1836_soc_resume
,
394 EXPORT_SYMBOL_GPL(soc_codec_dev_ad1836
);
396 static int __init
ad1836_init(void)
400 ret
= spi_register_driver(&ad1836_spi_driver
);
402 printk(KERN_ERR
"Failed to register ad1836 SPI driver: %d\n",
408 module_init(ad1836_init
);
410 static void __exit
ad1836_exit(void)
412 spi_unregister_driver(&ad1836_spi_driver
);
414 module_exit(ad1836_exit
);
416 MODULE_DESCRIPTION("ASoC ad1836 driver");
417 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
418 MODULE_LICENSE("GPL");