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");