340 строки
8.7 KiB
C
340 строки
8.7 KiB
C
/*
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* File: sound/soc/codecs/ad1836.c
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* Author: Barry Song <Barry.Song@analog.com>
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*
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* Created: Aug 04 2009
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* Description: Driver for AD1836 sound chip
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*
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* Modified:
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* Copyright 2009 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include <sound/tlv.h>
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#include <sound/soc-dapm.h>
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#include <linux/spi/spi.h>
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#include "ad1836.h"
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/* codec private data */
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struct ad1836_priv {
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enum snd_soc_control_type control_type;
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void *control_data;
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};
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/*
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* AD1836 volume/mute/de-emphasis etc. controls
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*/
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static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};
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static const struct soc_enum ad1836_deemp_enum =
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SOC_ENUM_SINGLE(AD1836_DAC_CTRL1, 8, 4, ad1836_deemp);
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static const struct snd_kcontrol_new ad1836_snd_controls[] = {
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/* DAC volume control */
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SOC_DOUBLE_R("DAC1 Volume", AD1836_DAC_L1_VOL,
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AD1836_DAC_R1_VOL, 0, 0x3FF, 0),
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SOC_DOUBLE_R("DAC2 Volume", AD1836_DAC_L2_VOL,
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AD1836_DAC_R2_VOL, 0, 0x3FF, 0),
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SOC_DOUBLE_R("DAC3 Volume", AD1836_DAC_L3_VOL,
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AD1836_DAC_R3_VOL, 0, 0x3FF, 0),
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/* ADC switch control */
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SOC_DOUBLE("ADC1 Switch", AD1836_ADC_CTRL2, AD1836_ADCL1_MUTE,
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AD1836_ADCR1_MUTE, 1, 1),
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SOC_DOUBLE("ADC2 Switch", AD1836_ADC_CTRL2, AD1836_ADCL2_MUTE,
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AD1836_ADCR2_MUTE, 1, 1),
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/* DAC switch control */
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SOC_DOUBLE("DAC1 Switch", AD1836_DAC_CTRL2, AD1836_DACL1_MUTE,
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AD1836_DACR1_MUTE, 1, 1),
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SOC_DOUBLE("DAC2 Switch", AD1836_DAC_CTRL2, AD1836_DACL2_MUTE,
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AD1836_DACR2_MUTE, 1, 1),
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SOC_DOUBLE("DAC3 Switch", AD1836_DAC_CTRL2, AD1836_DACL3_MUTE,
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AD1836_DACR3_MUTE, 1, 1),
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/* ADC high-pass filter */
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SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
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AD1836_ADC_HIGHPASS_FILTER, 1, 0),
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/* DAC de-emphasis */
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SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
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};
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static const struct snd_soc_dapm_widget ad1836_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
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AD1836_DAC_POWERDOWN, 1),
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SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
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AD1836_ADC_POWERDOWN, 1, NULL, 0),
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SND_SOC_DAPM_OUTPUT("DAC1OUT"),
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SND_SOC_DAPM_OUTPUT("DAC2OUT"),
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SND_SOC_DAPM_OUTPUT("DAC3OUT"),
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SND_SOC_DAPM_INPUT("ADC1IN"),
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SND_SOC_DAPM_INPUT("ADC2IN"),
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};
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static const struct snd_soc_dapm_route audio_paths[] = {
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{ "DAC", NULL, "ADC_PWR" },
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{ "ADC", NULL, "ADC_PWR" },
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{ "DAC1OUT", "DAC1 Switch", "DAC" },
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{ "DAC2OUT", "DAC2 Switch", "DAC" },
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{ "DAC3OUT", "DAC3 Switch", "DAC" },
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{ "ADC", "ADC1 Switch", "ADC1IN" },
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{ "ADC", "ADC2 Switch", "ADC2IN" },
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};
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/*
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* DAI ops entries
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*/
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static int ad1836_set_dai_fmt(struct snd_soc_dai *codec_dai,
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unsigned int fmt)
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{
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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/* at present, we support adc aux mode to interface with
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* blackfin sport tdm mode
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*/
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case SND_SOC_DAIFMT_DSP_A:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_IB_IF:
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break;
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default:
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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/* ALCLK,ABCLK are both output, AD1836 can only be master */
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case SND_SOC_DAIFMT_CBM_CFM:
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int ad1836_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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int word_len = 0;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_codec *codec = rtd->codec;
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/* bit size */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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word_len = 3;
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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word_len = 1;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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case SNDRV_PCM_FORMAT_S32_LE:
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word_len = 0;
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break;
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}
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snd_soc_update_bits(codec, AD1836_DAC_CTRL1,
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AD1836_DAC_WORD_LEN_MASK, word_len);
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snd_soc_update_bits(codec, AD1836_ADC_CTRL2,
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AD1836_ADC_WORD_LEN_MASK, word_len);
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return 0;
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}
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#ifdef CONFIG_PM
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static int ad1836_soc_suspend(struct snd_soc_codec *codec,
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pm_message_t state)
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{
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/* reset clock control mode */
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u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
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adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
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return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
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}
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static int ad1836_soc_resume(struct snd_soc_codec *codec)
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{
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/* restore clock control mode */
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u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
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adc_ctrl2 |= AD1836_ADC_AUX;
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return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
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}
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#else
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#define ad1836_soc_suspend NULL
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#define ad1836_soc_resume NULL
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#endif
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static struct snd_soc_dai_ops ad1836_dai_ops = {
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.hw_params = ad1836_hw_params,
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.set_fmt = ad1836_set_dai_fmt,
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};
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/* codec DAI instance */
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static struct snd_soc_dai_driver ad1836_dai = {
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.name = "ad1836-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 6,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
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},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 2,
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.channels_max = 4,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
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},
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.ops = &ad1836_dai_ops,
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};
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static int ad1836_probe(struct snd_soc_codec *codec)
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{
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struct ad1836_priv *ad1836 = snd_soc_codec_get_drvdata(codec);
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int ret = 0;
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codec->control_data = ad1836->control_data;
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ret = snd_soc_codec_set_cache_io(codec, 4, 12, SND_SOC_SPI);
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if (ret < 0) {
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dev_err(codec->dev, "failed to set cache I/O: %d\n",
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ret);
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kfree(ad1836);
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return ret;
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}
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/* default setting for ad1836 */
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/* de-emphasis: 48kHz, power-on dac */
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snd_soc_write(codec, AD1836_DAC_CTRL1, 0x300);
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/* unmute dac channels */
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snd_soc_write(codec, AD1836_DAC_CTRL2, 0x0);
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/* high-pass filter enable, power-on adc */
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snd_soc_write(codec, AD1836_ADC_CTRL1, 0x100);
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/* unmute adc channles, adc aux mode */
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snd_soc_write(codec, AD1836_ADC_CTRL2, 0x180);
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/* left/right diff:PGA/MUX */
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snd_soc_write(codec, AD1836_ADC_CTRL3, 0x3A);
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/* volume */
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snd_soc_write(codec, AD1836_DAC_L1_VOL, 0x3FF);
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snd_soc_write(codec, AD1836_DAC_R1_VOL, 0x3FF);
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snd_soc_write(codec, AD1836_DAC_L2_VOL, 0x3FF);
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snd_soc_write(codec, AD1836_DAC_R2_VOL, 0x3FF);
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snd_soc_write(codec, AD1836_DAC_L3_VOL, 0x3FF);
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snd_soc_write(codec, AD1836_DAC_R3_VOL, 0x3FF);
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snd_soc_add_controls(codec, ad1836_snd_controls,
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ARRAY_SIZE(ad1836_snd_controls));
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snd_soc_dapm_new_controls(codec, ad1836_dapm_widgets,
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ARRAY_SIZE(ad1836_dapm_widgets));
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snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
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return ret;
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}
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/* power down chip */
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static int ad1836_remove(struct snd_soc_codec *codec)
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{
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/* reset clock control mode */
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u16 adc_ctrl2 = snd_soc_read(codec, AD1836_ADC_CTRL2);
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adc_ctrl2 &= ~AD1836_ADC_SERFMT_MASK;
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return snd_soc_write(codec, AD1836_ADC_CTRL2, adc_ctrl2);
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}
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static struct snd_soc_codec_driver soc_codec_dev_ad1836 = {
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.probe = ad1836_probe,
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.remove = ad1836_remove,
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.suspend = ad1836_soc_suspend,
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.resume = ad1836_soc_resume,
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.reg_cache_size = AD1836_NUM_REGS,
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.reg_word_size = sizeof(u16),
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};
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static int __devinit ad1836_spi_probe(struct spi_device *spi)
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{
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struct ad1836_priv *ad1836;
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int ret;
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ad1836 = kzalloc(sizeof(struct ad1836_priv), GFP_KERNEL);
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if (ad1836 == NULL)
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return -ENOMEM;
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spi_set_drvdata(spi, ad1836);
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ad1836->control_data = spi;
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ad1836->control_type = SND_SOC_SPI;
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ret = snd_soc_register_codec(&spi->dev,
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&soc_codec_dev_ad1836, &ad1836_dai, 1);
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if (ret < 0)
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kfree(ad1836);
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return ret;
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}
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static int __devexit ad1836_spi_remove(struct spi_device *spi)
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{
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snd_soc_unregister_codec(&spi->dev);
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kfree(spi_get_drvdata(spi));
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return 0;
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}
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static struct spi_driver ad1836_spi_driver = {
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.driver = {
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.name = "ad1836-codec",
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.owner = THIS_MODULE,
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},
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.probe = ad1836_spi_probe,
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.remove = __devexit_p(ad1836_spi_remove),
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};
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static int __init ad1836_init(void)
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{
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int ret;
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ret = spi_register_driver(&ad1836_spi_driver);
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if (ret != 0) {
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printk(KERN_ERR "Failed to register ad1836 SPI driver: %d\n",
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ret);
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}
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return ret;
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}
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module_init(ad1836_init);
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static void __exit ad1836_exit(void)
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{
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spi_unregister_driver(&ad1836_spi_driver);
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}
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module_exit(ad1836_exit);
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MODULE_DESCRIPTION("ASoC ad1836 driver");
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_LICENSE("GPL");
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