eukrea-tlv320.c

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/*
 * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
 *
 * Copyright 2010 Eric Bénard, Eukréa Electromatique <[email protected]>
 *
 * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
 * which is Copyright 2009 Simtec Electronics
 * and on sound/soc/imx/phycore-ac97.c which is
 * Copyright 2009 Sascha Hauer, Pengutronix <[email protected]>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>

#include "../codecs/tlv320aic23.h"
#include "imx-ssi.h"
#include "imx-audmux.h"

#define CODEC_CLOCK 12000000

static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
                struct snd_pcm_hw_params *params)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;
    struct snd_soc_dai *codec_dai = rtd->codec_dai;
    struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
    int ret;

    ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
                  SND_SOC_DAIFMT_NB_NF |
                  SND_SOC_DAIFMT_CBM_CFM);
    if (ret) {
        pr_err("%s: failed set cpu dai format\n", __func__);
        return ret;
    }

    ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
                  SND_SOC_DAIFMT_NB_NF |
                  SND_SOC_DAIFMT_CBM_CFM);
    if (ret) {
        pr_err("%s: failed set codec dai format\n", __func__);
        return ret;
    }

    ret = snd_soc_dai_set_sysclk(codec_dai, 0,
                     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
    if (ret) {
        pr_err("%s: failed setting codec sysclk\n", __func__);
        return ret;
    }
    snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);

    ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
                SND_SOC_CLOCK_IN);
    if (ret) {
        pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
        return ret;
    }

    return 0;
}

static struct snd_soc_ops eukrea_tlv320_snd_ops = {
    .hw_params  = eukrea_tlv320_hw_params,
};

static struct snd_soc_dai_link eukrea_tlv320_dai = {
    .name       = "tlv320aic23",
    .stream_name    = "TLV320AIC23",
    .codec_dai_name = "tlv320aic23-hifi",
    .platform_name  = "imx-fiq-pcm-audio.0",
    .codec_name = "tlv320aic23-codec.0-001a",
    .cpu_dai_name   = "imx-ssi.0",
    .ops        = &eukrea_tlv320_snd_ops,
};

static struct snd_soc_card eukrea_tlv320 = {
    .name       = "cpuimx-audio",
    .owner      = THIS_MODULE,
    .dai_link   = &eukrea_tlv320_dai,
    .num_links  = 1,
};

static int __devinit eukrea_tlv320_probe(struct platform_device *pdev)
{
    int ret;
    int int_port = 0, ext_port;

    if (machine_is_eukrea_cpuimx27()) {
        imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR1_SSI0,
            IMX_AUDMUX_V1_PCR_SYN |
            IMX_AUDMUX_V1_PCR_TFSDIR |
            IMX_AUDMUX_V1_PCR_TCLKDIR |
            IMX_AUDMUX_V1_PCR_RFSDIR |
            IMX_AUDMUX_V1_PCR_RCLKDIR |
            IMX_AUDMUX_V1_PCR_TFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
            IMX_AUDMUX_V1_PCR_RFCSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4) |
            IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR3_SSI_PINS_4)
        );
        imx_audmux_v1_configure_port(MX27_AUDMUX_HPCR3_SSI_PINS_4,
            IMX_AUDMUX_V1_PCR_SYN |
            IMX_AUDMUX_V1_PCR_RXDSEL(MX27_AUDMUX_HPCR1_SSI0)
        );
    } else if (machine_is_eukrea_cpuimx25sd() ||
           machine_is_eukrea_cpuimx35sd() ||
           machine_is_eukrea_cpuimx51sd()) {
        ext_port = machine_is_eukrea_cpuimx25sd() ? 4 : 3;
        imx_audmux_v2_configure_port(int_port,
            IMX_AUDMUX_V2_PTCR_SYN |
            IMX_AUDMUX_V2_PTCR_TFSDIR |
            IMX_AUDMUX_V2_PTCR_TFSEL(ext_port) |
            IMX_AUDMUX_V2_PTCR_TCLKDIR |
            IMX_AUDMUX_V2_PTCR_TCSEL(ext_port),
            IMX_AUDMUX_V2_PDCR_RXDSEL(ext_port)
        );
        imx_audmux_v2_configure_port(ext_port,
            IMX_AUDMUX_V2_PTCR_SYN,
            IMX_AUDMUX_V2_PDCR_RXDSEL(int_port)
        );
    } else {
        /* return happy. We might run on a totally different machine */
        return 0;
    }

    eukrea_tlv320.dev = &pdev->dev;
    ret = snd_soc_register_card(&eukrea_tlv320);
    if (ret)
        dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);

    return ret;
}

static int __devexit eukrea_tlv320_remove(struct platform_device *pdev)
{
    snd_soc_unregister_card(&eukrea_tlv320);

    return 0;
}

static struct platform_driver eukrea_tlv320_driver = {
    .driver = {
        .name = "eukrea_tlv320",
        .owner = THIS_MODULE,
    },
    .probe = eukrea_tlv320_probe,
    .remove = __devexit_p(eukrea_tlv320_remove),};

module_platform_driver(eukrea_tlv320_driver);

MODULE_AUTHOR("Eric Bénard <[email protected]>");
MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:eukrea_tlv320");