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/slab.h>
21 #include <linux/module.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>
34 /* codec private data */
36 enum snd_soc_control_type control_type
;
41 * AD1836 volume/mute/de-emphasis etc. controls
43 static const char *ad1836_deemp
[] = {"None", "44.1kHz", "32kHz", "48kHz"};
45 static const struct soc_enum ad1836_deemp_enum
=
46 SOC_ENUM_SINGLE(AD1836_DAC_CTRL1
, 8, 4, ad1836_deemp
);
48 static const struct snd_kcontrol_new ad1836_snd_controls
[] = {
49 /* DAC volume control */
50 SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL
,
51 AD1836_DAC_R1_VOL
, 0, 0x3FF, 0),
52 SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL
,
53 AD1836_DAC_R2_VOL
, 0, 0x3FF, 0),
54 SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL
,
55 AD1836_DAC_R3_VOL
, 0, 0x3FF, 0),
57 /* ADC switch control */
58 SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2
, AD1836_ADCL1_MUTE
,
59 AD1836_ADCR1_MUTE
, 1, 1),
60 SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2
, AD1836_ADCL2_MUTE
,
61 AD1836_ADCR2_MUTE
, 1, 1),
63 /* DAC switch control */
64 SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2
, AD1836_DACL1_MUTE
,
65 AD1836_DACR1_MUTE
, 1, 1),
66 SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2
, AD1836_DACL2_MUTE
,
67 AD1836_DACR2_MUTE
, 1, 1),
68 SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2
, AD1836_DACL3_MUTE
,
69 AD1836_DACR3_MUTE
, 1, 1),
71 /* ADC high-pass filter */
72 SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1
,
73 AD1836_ADC_HIGHPASS_FILTER
, 1, 0),
76 SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum
),
79 static const struct snd_soc_dapm_widget ad1836_dapm_widgets
[] = {
80 SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1
,
81 AD1836_DAC_POWERDOWN
, 1),
82 SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM
, 0, 0),
83 SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1
,
84 AD1836_ADC_POWERDOWN
, 1, NULL
, 0),
85 SND_SOC_DAPM_OUTPUT("DAC1OUT"),
86 SND_SOC_DAPM_OUTPUT("DAC2OUT"),
87 SND_SOC_DAPM_OUTPUT("DAC3OUT"),
88 SND_SOC_DAPM_INPUT("ADC1IN"),
89 SND_SOC_DAPM_INPUT("ADC2IN"),
92 static const struct snd_soc_dapm_route audio_paths
[] = {
93 { "DAC", NULL
, "ADC_PWR" },
94 { "ADC", NULL
, "ADC_PWR" },
95 { "DAC1OUT", "DAC1 Switch", "DAC" },
96 { "DAC2OUT", "DAC2 Switch", "DAC" },
97 { "DAC3OUT", "DAC3 Switch", "DAC" },
98 { "ADC", "ADC1 Switch", "ADC1IN" },
99 { "ADC", "ADC2 Switch", "ADC2IN" },
106 static int ad1836_set_dai_fmt(struct snd_soc_dai
*codec_dai
,
109 switch (fmt
& SND_SOC_DAIFMT_FORMAT_MASK
) {
110 /* at present, we support adc aux mode to interface with
111 * blackfin sport tdm mode
113 case SND_SOC_DAIFMT_DSP_A
:
119 switch (fmt
& SND_SOC_DAIFMT_INV_MASK
) {
120 case SND_SOC_DAIFMT_IB_IF
:
126 switch (fmt
& SND_SOC_DAIFMT_MASTER_MASK
) {
127 /* ALCLK,ABCLK are both output, AD1836 can only be master */
128 case SND_SOC_DAIFMT_CBM_CFM
:
137 static int ad1836_hw_params(struct snd_pcm_substream
*substream
,
138 struct snd_pcm_hw_params
*params
,
139 struct snd_soc_dai
*dai
)
143 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
144 struct snd_soc_codec
*codec
= rtd
->codec
;
147 switch (params_format(params
)) {
148 case SNDRV_PCM_FORMAT_S16_LE
:
151 case SNDRV_PCM_FORMAT_S20_3LE
:
154 case SNDRV_PCM_FORMAT_S24_LE
:
155 case SNDRV_PCM_FORMAT_S32_LE
:
160 snd_soc_update_bits(codec
, AD1836_DAC_CTRL1
,
161 AD1836_DAC_WORD_LEN_MASK
, word_len
);
163 snd_soc_update_bits(codec
, AD1836_ADC_CTRL2
,
164 AD1836_ADC_WORD_LEN_MASK
, word_len
);
170 static int ad1836_soc_suspend(struct snd_soc_codec
*codec
,
173 /* reset clock control mode */
174 u16 adc_ctrl2
= snd_soc_read(codec
, AD1836_ADC_CTRL2
);
175 adc_ctrl2
&= ~AD1836_ADC_SERFMT_MASK
;
177 return snd_soc_write(codec
, AD1836_ADC_CTRL2
, adc_ctrl2
);
180 static int ad1836_soc_resume(struct snd_soc_codec
*codec
)
182 /* restore clock control mode */
183 u16 adc_ctrl2
= snd_soc_read(codec
, AD1836_ADC_CTRL2
);
184 adc_ctrl2
|= AD1836_ADC_AUX
;
186 return snd_soc_write(codec
, AD1836_ADC_CTRL2
, adc_ctrl2
);
189 #define ad1836_soc_suspend NULL
190 #define ad1836_soc_resume NULL
193 static struct snd_soc_dai_ops ad1836_dai_ops
= {
194 .hw_params
= ad1836_hw_params
,
195 .set_fmt
= ad1836_set_dai_fmt
,
198 /* codec DAI instance */
199 static struct snd_soc_dai_driver ad1836_dai
= {
200 .name
= "ad1836-hifi",
202 .stream_name
= "Playback",
205 .rates
= SNDRV_PCM_RATE_48000
,
206 .formats
= SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S16_LE
|
207 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S24_LE
,
210 .stream_name
= "Capture",
213 .rates
= SNDRV_PCM_RATE_48000
,
214 .formats
= SNDRV_PCM_FMTBIT_S32_LE
| SNDRV_PCM_FMTBIT_S16_LE
|
215 SNDRV_PCM_FMTBIT_S20_3LE
| SNDRV_PCM_FMTBIT_S24_LE
,
217 .ops
= &ad1836_dai_ops
,
220 static int ad1836_probe(struct snd_soc_codec
*codec
)
222 struct ad1836_priv
*ad1836
= snd_soc_codec_get_drvdata(codec
);
225 codec
->control_data
= ad1836
->control_data
;
226 ret
= snd_soc_codec_set_cache_io(codec
, 4, 12, SND_SOC_SPI
);
228 dev_err(codec
->dev
, "failed to set cache I/O: %d\n",
234 /* default setting for ad1836 */
235 /* de-emphasis: 48kHz, power-on dac */
236 snd_soc_write(codec
, AD1836_DAC_CTRL1
, 0x300);
237 /* unmute dac channels */
238 snd_soc_write(codec
, AD1836_DAC_CTRL2
, 0x0);
239 /* high-pass filter enable, power-on adc */
240 snd_soc_write(codec
, AD1836_ADC_CTRL1
, 0x100);
241 /* unmute adc channles, adc aux mode */
242 snd_soc_write(codec
, AD1836_ADC_CTRL2
, 0x180);
243 /* left/right diff:PGA/MUX */
244 snd_soc_write(codec
, AD1836_ADC_CTRL3
, 0x3A);
246 snd_soc_write(codec
, AD1836_DAC_L1_VOL
, 0x3FF);
247 snd_soc_write(codec
, AD1836_DAC_R1_VOL
, 0x3FF);
248 snd_soc_write(codec
, AD1836_DAC_L2_VOL
, 0x3FF);
249 snd_soc_write(codec
, AD1836_DAC_R2_VOL
, 0x3FF);
250 snd_soc_write(codec
, AD1836_DAC_L3_VOL
, 0x3FF);
251 snd_soc_write(codec
, AD1836_DAC_R3_VOL
, 0x3FF);
253 snd_soc_add_controls(codec
, ad1836_snd_controls
,
254 ARRAY_SIZE(ad1836_snd_controls
));
255 snd_soc_dapm_new_controls(codec
, ad1836_dapm_widgets
,
256 ARRAY_SIZE(ad1836_dapm_widgets
));
257 snd_soc_dapm_add_routes(codec
, audio_paths
, ARRAY_SIZE(audio_paths
));
262 /* power down chip */
263 static int ad1836_remove(struct snd_soc_codec
*codec
)
265 /* reset clock control mode */
266 u16 adc_ctrl2
= snd_soc_read(codec
, AD1836_ADC_CTRL2
);
267 adc_ctrl2
&= ~AD1836_ADC_SERFMT_MASK
;
269 return snd_soc_write(codec
, AD1836_ADC_CTRL2
, adc_ctrl2
);
272 static struct snd_soc_codec_driver soc_codec_dev_ad1836
= {
273 .probe
= ad1836_probe
,
274 .remove
= ad1836_remove
,
275 .suspend
= ad1836_soc_suspend
,
276 .resume
= ad1836_soc_resume
,
277 .reg_cache_size
= AD1836_NUM_REGS
,
278 .reg_word_size
= sizeof(u16
),
281 static int __devinit
ad1836_spi_probe(struct spi_device
*spi
)
283 struct ad1836_priv
*ad1836
;
286 ad1836
= kzalloc(sizeof(struct ad1836_priv
), GFP_KERNEL
);
290 spi_set_drvdata(spi
, ad1836
);
291 ad1836
->control_data
= spi
;
292 ad1836
->control_type
= SND_SOC_SPI
;
294 ret
= snd_soc_register_codec(&spi
->dev
,
295 &soc_codec_dev_ad1836
, &ad1836_dai
, 1);
301 static int __devexit
ad1836_spi_remove(struct spi_device
*spi
)
303 snd_soc_unregister_codec(&spi
->dev
);
304 kfree(spi_get_drvdata(spi
));
308 static struct spi_driver ad1836_spi_driver
= {
310 .name
= "ad1836-codec",
311 .owner
= THIS_MODULE
,
313 .probe
= ad1836_spi_probe
,
314 .remove
= __devexit_p(ad1836_spi_remove
),
317 static int __init
ad1836_init(void)
321 ret
= spi_register_driver(&ad1836_spi_driver
);
323 printk(KERN_ERR
"Failed to register ad1836 SPI driver: %d\n",
329 module_init(ad1836_init
);
331 static void __exit
ad1836_exit(void)
333 spi_unregister_driver(&ad1836_spi_driver
);
335 module_exit(ad1836_exit
);
337 MODULE_DESCRIPTION("ASoC ad1836 driver");
338 MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
339 MODULE_LICENSE("GPL");