davinci-evm.c

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/*
 * ASoC driver for TI DAVINCI EVM platform
 *
 * Author:      Vladimir Barinov, <[email protected]>
 * Copyright:   (C) 2007 MontaVista Software, Inc., <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>

#include <asm/dma.h>
#include <asm/mach-types.h>

#include "davinci-pcm.h"
#include "davinci-i2s.h"
#include "davinci-mcasp.h"

#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \
        SND_SOC_DAIFMT_CBM_CFM | SND_SOC_DAIFMT_IB_NF)
static int evm_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 = 0;
    unsigned sysclk;

    /* ASP1 on DM355 EVM is clocked by an external oscillator */
    if (machine_is_davinci_dm355_evm() || machine_is_davinci_dm6467_evm() ||
        machine_is_davinci_dm365_evm())
        sysclk = 27000000;

    /* ASP0 in DM6446 EVM is clocked by U55, as configured by
     * board-dm644x-evm.c using GPIOs from U18.  There are six
     * options; here we "know" we use a 48 KHz sample rate.
     */
    else if (machine_is_davinci_evm())
        sysclk = 12288000;

    else if (machine_is_davinci_da830_evm() ||
                machine_is_davinci_da850_evm())
        sysclk = 24576000;

    else
        return -EINVAL;

    /* set codec DAI configuration */
    ret = snd_soc_dai_set_fmt(codec_dai, AUDIO_FORMAT);
    if (ret < 0)
        return ret;

    /* set cpu DAI configuration */
    ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
    if (ret < 0)
        return ret;

    /* set the codec system clock */
    ret = snd_soc_dai_set_sysclk(codec_dai, 0, sysclk, SND_SOC_CLOCK_OUT);
    if (ret < 0)
        return ret;

    return 0;
}

static int evm_spdif_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 *cpu_dai = rtd->cpu_dai;

    /* set cpu DAI configuration */
    return snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT);
}

static struct snd_soc_ops evm_ops = {
    .hw_params = evm_hw_params,
};

static struct snd_soc_ops evm_spdif_ops = {
    .hw_params = evm_spdif_hw_params,
};

/* davinci-evm machine dapm widgets */
static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Headphone Jack", NULL),
    SND_SOC_DAPM_LINE("Line Out", NULL),
    SND_SOC_DAPM_MIC("Mic Jack", NULL),
    SND_SOC_DAPM_LINE("Line In", NULL),
};

/* davinci-evm machine audio_mapnections to the codec pins */
static const struct snd_soc_dapm_route audio_map[] = {
    /* Headphone connected to HPLOUT, HPROUT */
    {"Headphone Jack", NULL, "HPLOUT"},
    {"Headphone Jack", NULL, "HPROUT"},

    /* Line Out connected to LLOUT, RLOUT */
    {"Line Out", NULL, "LLOUT"},
    {"Line Out", NULL, "RLOUT"},

    /* Mic connected to (MIC3L | MIC3R) */
    {"MIC3L", NULL, "Mic Bias 2V"},
    {"MIC3R", NULL, "Mic Bias 2V"},
    {"Mic Bias 2V", NULL, "Mic Jack"},

    /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
    {"LINE1L", NULL, "Line In"},
    {"LINE2L", NULL, "Line In"},
    {"LINE1R", NULL, "Line In"},
    {"LINE2R", NULL, "Line In"},
};

/* Logic for a aic3x as connected on a davinci-evm */
static int evm_aic3x_init(struct snd_soc_pcm_runtime *rtd)
{
    struct snd_soc_codec *codec = rtd->codec;
    struct snd_soc_dapm_context *dapm = &codec->dapm;

    /* Add davinci-evm specific widgets */
    snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
                  ARRAY_SIZE(aic3x_dapm_widgets));

    /* Set up davinci-evm specific audio path audio_map */
    snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

    /* not connected */
    snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
    snd_soc_dapm_disable_pin(dapm, "HPLCOM");
    snd_soc_dapm_disable_pin(dapm, "HPRCOM");

    /* always connected */
    snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
    snd_soc_dapm_enable_pin(dapm, "Line Out");
    snd_soc_dapm_enable_pin(dapm, "Mic Jack");
    snd_soc_dapm_enable_pin(dapm, "Line In");

    return 0;
}

/* davinci-evm digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link dm6446_evm_dai = {
    .name = "TLV320AIC3X",
    .stream_name = "AIC3X",
    .cpu_dai_name = "davinci-mcbsp",
    .codec_dai_name = "tlv320aic3x-hifi",
    .codec_name = "tlv320aic3x-codec.1-001b",
    .platform_name = "davinci-mcbsp",
    .init = evm_aic3x_init,
    .ops = &evm_ops,
};

static struct snd_soc_dai_link dm355_evm_dai = {
    .name = "TLV320AIC3X",
    .stream_name = "AIC3X",
    .cpu_dai_name = "davinci-mcbsp.1",
    .codec_dai_name = "tlv320aic3x-hifi",
    .codec_name = "tlv320aic3x-codec.1-001b",
    .platform_name = "davinci-mcbsp.1",
    .init = evm_aic3x_init,
    .ops = &evm_ops,
};

static struct snd_soc_dai_link dm365_evm_dai = {
#ifdef CONFIG_SND_DM365_AIC3X_CODEC
    .name = "TLV320AIC3X",
    .stream_name = "AIC3X",
    .cpu_dai_name = "davinci-mcbsp",
    .codec_dai_name = "tlv320aic3x-hifi",
    .init = evm_aic3x_init,
    .codec_name = "tlv320aic3x-codec.1-0018",
    .ops = &evm_ops,
    .platform_name = "davinci-mcbsp",
#elif defined(CONFIG_SND_DM365_VOICE_CODEC)
    .name = "Voice Codec - CQ93VC",
    .stream_name = "CQ93",
    .cpu_dai_name = "davinci-vcif",
    .codec_dai_name = "cq93vc-hifi",
    .codec_name = "cq93vc-codec",
    .platform_name = "davinci-vcif",
#endif
};

static struct snd_soc_dai_link dm6467_evm_dai[] = {
    {
        .name = "TLV320AIC3X",
        .stream_name = "AIC3X",
        .cpu_dai_name= "davinci-mcasp.0",
        .codec_dai_name = "tlv320aic3x-hifi",
        .platform_name = "davinci-mcasp.0",
        .codec_name = "tlv320aic3x-codec.0-001a",
        .init = evm_aic3x_init,
        .ops = &evm_ops,
    },
    {
        .name = "McASP",
        .stream_name = "spdif",
        .cpu_dai_name= "davinci-mcasp.1",
        .codec_dai_name = "dit-hifi",
        .codec_name = "spdif_dit",
        .platform_name = "davinci-mcasp.1",
        .ops = &evm_spdif_ops,
    },
};

static struct snd_soc_dai_link da830_evm_dai = {
    .name = "TLV320AIC3X",
    .stream_name = "AIC3X",
    .cpu_dai_name = "davinci-mcasp.1",
    .codec_dai_name = "tlv320aic3x-hifi",
    .codec_name = "tlv320aic3x-codec.1-0018",
    .platform_name = "davinci-mcasp.1",
    .init = evm_aic3x_init,
    .ops = &evm_ops,
};

static struct snd_soc_dai_link da850_evm_dai = {
    .name = "TLV320AIC3X",
    .stream_name = "AIC3X",
    .cpu_dai_name= "davinci-mcasp.0",
    .codec_dai_name = "tlv320aic3x-hifi",
    .codec_name = "tlv320aic3x-codec.1-0018",
    .platform_name = "davinci-mcasp.0",
    .init = evm_aic3x_init,
    .ops = &evm_ops,
};

/* davinci dm6446 evm audio machine driver */
static struct snd_soc_card dm6446_snd_soc_card_evm = {
    .name = "DaVinci DM6446 EVM",
    .owner = THIS_MODULE,
    .dai_link = &dm6446_evm_dai,
    .num_links = 1,
};

/* davinci dm355 evm audio machine driver */
static struct snd_soc_card dm355_snd_soc_card_evm = {
    .name = "DaVinci DM355 EVM",
    .owner = THIS_MODULE,
    .dai_link = &dm355_evm_dai,
    .num_links = 1,
};

/* davinci dm365 evm audio machine driver */
static struct snd_soc_card dm365_snd_soc_card_evm = {
    .name = "DaVinci DM365 EVM",
    .owner = THIS_MODULE,
    .dai_link = &dm365_evm_dai,
    .num_links = 1,
};

/* davinci dm6467 evm audio machine driver */
static struct snd_soc_card dm6467_snd_soc_card_evm = {
    .name = "DaVinci DM6467 EVM",
    .owner = THIS_MODULE,
    .dai_link = dm6467_evm_dai,
    .num_links = ARRAY_SIZE(dm6467_evm_dai),
};

static struct snd_soc_card da830_snd_soc_card = {
    .name = "DA830/OMAP-L137 EVM",
    .owner = THIS_MODULE,
    .dai_link = &da830_evm_dai,
    .num_links = 1,
};

static struct snd_soc_card da850_snd_soc_card = {
    .name = "DA850/OMAP-L138 EVM",
    .owner = THIS_MODULE,
    .dai_link = &da850_evm_dai,
    .num_links = 1,
};

static struct platform_device *evm_snd_device;

static int __init evm_init(void)
{
    struct snd_soc_card *evm_snd_dev_data;
    int index;
    int ret;

    if (machine_is_davinci_evm()) {
        evm_snd_dev_data = &dm6446_snd_soc_card_evm;
        index = 0;
    } else if (machine_is_davinci_dm355_evm()) {
        evm_snd_dev_data = &dm355_snd_soc_card_evm;
        index = 1;
    } else if (machine_is_davinci_dm365_evm()) {
        evm_snd_dev_data = &dm365_snd_soc_card_evm;
        index = 0;
    } else if (machine_is_davinci_dm6467_evm()) {
        evm_snd_dev_data = &dm6467_snd_soc_card_evm;
        index = 0;
    } else if (machine_is_davinci_da830_evm()) {
        evm_snd_dev_data = &da830_snd_soc_card;
        index = 1;
    } else if (machine_is_davinci_da850_evm()) {
        evm_snd_dev_data = &da850_snd_soc_card;
        index = 0;
    } else
        return -EINVAL;

    evm_snd_device = platform_device_alloc("soc-audio", index);
    if (!evm_snd_device)
        return -ENOMEM;

    platform_set_drvdata(evm_snd_device, evm_snd_dev_data);
    ret = platform_device_add(evm_snd_device);
    if (ret)
        platform_device_put(evm_snd_device);

    return ret;
}

static void __exit evm_exit(void)
{
    platform_device_unregister(evm_snd_device);
}

module_init(evm_init);
module_exit(evm_exit);

MODULE_AUTHOR("Vladimir Barinov");
MODULE_DESCRIPTION("TI DAVINCI EVM ASoC driver");
MODULE_LICENSE("GPL");