ASoC: Add PCM3008 ALSA SoC driver
The PCM3008 is a 16-bit stereo audio codec. It accepts left-justified format for ADC, and right-justified format for DAC. Independent power-down modes for ADC and DAC are provided, as well as a digital de-emphasis filter (4 modes). [Merged Makefile & Kconfig, changed asm/gpio.h to linux/gpio.h -- broonie] Signed-off-by: Hugo Villeneuve <hugo@hugovil.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Hugo Villeneuve
Mark Brown
parent
ca3ea02e90
commit
1c0090c280
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@ -5,6 +5,7 @@ config SND_SOC_ALL_CODECS
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select SND_SOC_AD73311 if I2C
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select SND_SOC_AK4535 if I2C
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select SND_SOC_CS4270 if I2C
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select SND_SOC_PCM3008
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select SND_SOC_SSM2602 if I2C
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select SND_SOC_TLV320AIC23 if I2C
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select SND_SOC_TLV320AIC26 if SPI_MASTER
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@ -70,6 +71,9 @@ config SND_SOC_CS4270_VD33_ERRATA
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config SND_SOC_L3
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tristate
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config SND_SOC_PCM3008
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tristate
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config SND_SOC_SSM2602
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tristate
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@ -4,6 +4,7 @@ snd-soc-ad73311-objs := ad73311.o
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snd-soc-ak4535-objs := ak4535.o
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snd-soc-cs4270-objs := cs4270.o
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snd-soc-l3-objs := l3.o
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snd-soc-pcm3008-objs := pcm3008.o
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snd-soc-ssm2602-objs := ssm2602.o
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snd-soc-tlv320aic23-objs := tlv320aic23.o
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snd-soc-tlv320aic26-objs := tlv320aic26.o
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@ -30,6 +31,7 @@ obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
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obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o
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obj-$(CONFIG_SND_SOC_CS4270) += snd-soc-cs4270.o
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obj-$(CONFIG_SND_SOC_L3) += snd-soc-l3.o
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obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
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obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
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obj-$(CONFIG_SND_SOC_TLV320AIC23) += snd-soc-tlv320aic23.o
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obj-$(CONFIG_SND_SOC_TLV320AIC26) += snd-soc-tlv320aic26.o
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@ -0,0 +1,201 @@
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/*
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* ALSA Soc PCM3008 codec support
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*
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* Author: Hugo Villeneuve
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* Copyright (C) 2008 Lyrtech inc
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*
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* Based on AC97 Soc codec, original copyright follow:
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* Copyright 2005 Wolfson Microelectronics PLC.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Generic PCM3008 support.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include "pcm3008.h"
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#define PCM3008_VERSION "0.2"
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#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000)
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struct snd_soc_dai pcm3008_dai = {
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.name = "PCM3008 HiFi",
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.type = SND_SOC_DAI_I2S,
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.playback = {
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.stream_name = "PCM3008 Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = PCM3008_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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.capture = {
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.stream_name = "PCM3008 Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = PCM3008_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,
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},
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};
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EXPORT_SYMBOL_GPL(pcm3008_dai);
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static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
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{
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gpio_free(setup->dem0_pin);
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gpio_free(setup->dem1_pin);
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gpio_free(setup->pdad_pin);
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gpio_free(setup->pdda_pin);
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}
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static int pcm3008_soc_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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struct pcm3008_setup_data *setup = socdev->codec_data;
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int ret = 0;
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printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
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socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (!socdev->codec)
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return -ENOMEM;
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codec = socdev->codec;
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mutex_init(&codec->mutex);
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codec->name = "PCM3008";
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codec->owner = THIS_MODULE;
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codec->dai = &pcm3008_dai;
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codec->num_dai = 1;
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codec->write = NULL;
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codec->read = NULL;
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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/* Register PCMs. */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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printk(KERN_ERR "pcm3008: failed to create pcms\n");
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goto pcm_err;
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}
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/* Register Card. */
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ret = snd_soc_register_card(socdev);
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if (ret < 0) {
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printk(KERN_ERR "pcm3008: failed to register card\n");
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goto card_err;
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}
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/* DEM1 DEM0 DE-EMPHASIS_MODE
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* Low Low De-emphasis 44.1 kHz ON
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* Low High De-emphasis OFF
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* High Low De-emphasis 48 kHz ON
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* High High De-emphasis 32 kHz ON
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*/
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/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
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ret = gpio_request(setup->dem0_pin, "codec_dem0");
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if (ret == 0)
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ret = gpio_direction_output(setup->dem0_pin, 1);
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if (ret != 0)
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goto gpio_err;
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/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
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ret = gpio_request(setup->dem1_pin, "codec_dem1");
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if (ret == 0)
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ret = gpio_direction_output(setup->dem1_pin, 0);
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if (ret != 0)
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goto gpio_err;
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/* Configure PDAD GPIO. */
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ret = gpio_request(setup->pdad_pin, "codec_pdad");
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if (ret == 0)
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ret = gpio_direction_output(setup->pdad_pin, 1);
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if (ret != 0)
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goto gpio_err;
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/* Configure PDDA GPIO. */
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ret = gpio_request(setup->pdda_pin, "codec_pdda");
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if (ret == 0)
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ret = gpio_direction_output(setup->pdda_pin, 1);
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if (ret != 0)
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goto gpio_err;
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return ret;
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gpio_err:
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pcm3008_gpio_free(setup);
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card_err:
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snd_soc_free_pcms(socdev);
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pcm_err:
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kfree(socdev->codec);
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return ret;
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}
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static int pcm3008_soc_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->codec;
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struct pcm3008_setup_data *setup = socdev->codec_data;
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if (!codec)
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return 0;
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pcm3008_gpio_free(setup);
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snd_soc_free_pcms(socdev);
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kfree(socdev->codec);
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return 0;
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}
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#ifdef CONFIG_PM
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static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct pcm3008_setup_data *setup = socdev->codec_data;
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gpio_set_value(setup->pdad_pin, 0);
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gpio_set_value(setup->pdda_pin, 0);
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return 0;
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}
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static int pcm3008_soc_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct pcm3008_setup_data *setup = socdev->codec_data;
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gpio_set_value(setup->pdad_pin, 1);
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gpio_set_value(setup->pdda_pin, 1);
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return 0;
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}
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#else
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#define pcm3008_soc_suspend NULL
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#define pcm3008_soc_resume NULL
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#endif
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struct snd_soc_codec_device soc_codec_dev_pcm3008 = {
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.probe = pcm3008_soc_probe,
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.remove = pcm3008_soc_remove,
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.suspend = pcm3008_soc_suspend,
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.resume = pcm3008_soc_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);
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MODULE_DESCRIPTION("Soc PCM3008 driver");
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MODULE_AUTHOR("Hugo Villeneuve");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,25 @@
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/*
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* PCM3008 ALSA SoC Layer
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*
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* Author: Hugo Villeneuve
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* Copyright (C) 2008 Lyrtech inc
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __LINUX_SND_SOC_PCM3008_H
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#define __LINUX_SND_SOC_PCM3008_H
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struct pcm3008_setup_data {
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unsigned dem0_pin;
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unsigned dem1_pin;
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unsigned pdad_pin;
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unsigned pdda_pin;
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};
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extern struct snd_soc_codec_device soc_codec_dev_pcm3008;
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extern struct snd_soc_dai pcm3008_dai;
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#endif
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