trimslice.c

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/*
 * trimslice.c - TrimSlice machine ASoC driver
 *
 * Copyright (C) 2011 - CompuLab, Ltd.
 * Author: Mike Rapoport <[email protected]>
 *
 * Based on code copyright/by:
 * Author: Stephen Warren <[email protected]>
 * Copyright (C) 2010-2011 - NVIDIA, Inc.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <asm/mach-types.h>

#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <sound/core.h>
#include <sound/jack.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "../codecs/tlv320aic23.h"

#include "tegra_asoc_utils.h"

#define DRV_NAME "tegra-snd-trimslice"

struct tegra_trimslice {
    struct tegra_asoc_utils_data util_data;
};

static int trimslice_asoc_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_codec *codec = codec_dai->codec;
    struct snd_soc_card *card = codec->card;
    struct tegra_trimslice *trimslice = snd_soc_card_get_drvdata(card);
    int srate, mclk;
    int err;

    srate = params_rate(params);
    mclk = 128 * srate;

    err = tegra_asoc_utils_set_rate(&trimslice->util_data, srate, mclk);
    if (err < 0) {
        dev_err(card->dev, "Can't configure clocks\n");
        return err;
    }

    err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
                    SND_SOC_CLOCK_IN);
    if (err < 0) {
        dev_err(card->dev, "codec_dai clock not set\n");
        return err;
    }

    return 0;
}

static struct snd_soc_ops trimslice_asoc_ops = {
    .hw_params = trimslice_asoc_hw_params,
};

static const struct snd_soc_dapm_widget trimslice_dapm_widgets[] = {
    SND_SOC_DAPM_HP("Line Out", NULL),
    SND_SOC_DAPM_LINE("Line In", NULL),
};

static const struct snd_soc_dapm_route trimslice_audio_map[] = {
    {"Line Out", NULL, "LOUT"},
    {"Line Out", NULL, "ROUT"},

    {"LLINEIN", NULL, "Line In"},
    {"RLINEIN", NULL, "Line In"},
};

static struct snd_soc_dai_link trimslice_tlv320aic23_dai = {
    .name = "TLV320AIC23",
    .stream_name = "AIC23",
    .codec_name = "tlv320aic23-codec.2-001a",
    .platform_name = "tegra20-i2s.0",
    .cpu_dai_name = "tegra20-i2s.0",
    .codec_dai_name = "tlv320aic23-hifi",
    .ops = &trimslice_asoc_ops,
    .dai_fmt = SND_SOC_DAIFMT_I2S |
           SND_SOC_DAIFMT_NB_NF |
           SND_SOC_DAIFMT_CBS_CFS,
};

static struct snd_soc_card snd_soc_trimslice = {
    .name = "tegra-trimslice",
    .owner = THIS_MODULE,
    .dai_link = &trimslice_tlv320aic23_dai,
    .num_links = 1,

    .dapm_widgets = trimslice_dapm_widgets,
    .num_dapm_widgets = ARRAY_SIZE(trimslice_dapm_widgets),
    .dapm_routes = trimslice_audio_map,
    .num_dapm_routes = ARRAY_SIZE(trimslice_audio_map),
    .fully_routed = true,
};

static __devinit int tegra_snd_trimslice_probe(struct platform_device *pdev)
{
    struct snd_soc_card *card = &snd_soc_trimslice;
    struct tegra_trimslice *trimslice;
    int ret;

    trimslice = devm_kzalloc(&pdev->dev, sizeof(struct tegra_trimslice),
                 GFP_KERNEL);
    if (!trimslice) {
        dev_err(&pdev->dev, "Can't allocate tegra_trimslice\n");
        ret = -ENOMEM;
        goto err;
    }

    if (pdev->dev.of_node) {
        trimslice_tlv320aic23_dai.codec_name = NULL;
        trimslice_tlv320aic23_dai.codec_of_node = of_parse_phandle(
                pdev->dev.of_node, "nvidia,audio-codec", 0);
        if (!trimslice_tlv320aic23_dai.codec_of_node) {
            dev_err(&pdev->dev,
                "Property 'nvidia,audio-codec' missing or invalid\n");
            ret = -EINVAL;
            goto err;
        }

        trimslice_tlv320aic23_dai.cpu_dai_name = NULL;
        trimslice_tlv320aic23_dai.cpu_of_node = of_parse_phandle(
                pdev->dev.of_node, "nvidia,i2s-controller", 0);
        if (!trimslice_tlv320aic23_dai.cpu_of_node) {
            dev_err(&pdev->dev,
                "Property 'nvidia,i2s-controller' missing or invalid\n");
            ret = -EINVAL;
            goto err;
        }

        trimslice_tlv320aic23_dai.platform_name = NULL;
        trimslice_tlv320aic23_dai.platform_of_node =
                trimslice_tlv320aic23_dai.cpu_of_node;
    }

    ret = tegra_asoc_utils_init(&trimslice->util_data, &pdev->dev);
    if (ret)
        goto err;

    card->dev = &pdev->dev;
    platform_set_drvdata(pdev, card);
    snd_soc_card_set_drvdata(card, trimslice);

    ret = snd_soc_register_card(card);
    if (ret) {
        dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
            ret);
        goto err_fini_utils;
    }

    return 0;

err_fini_utils:
    tegra_asoc_utils_fini(&trimslice->util_data);
err:
    return ret;
}

static int __devexit tegra_snd_trimslice_remove(struct platform_device *pdev)
{
    struct snd_soc_card *card = platform_get_drvdata(pdev);
    struct tegra_trimslice *trimslice = snd_soc_card_get_drvdata(card);

    snd_soc_unregister_card(card);

    tegra_asoc_utils_fini(&trimslice->util_data);

    return 0;
}

static const struct of_device_id trimslice_of_match[] __devinitconst = {
    { .compatible = "nvidia,tegra-audio-trimslice", },
    {},
};
MODULE_DEVICE_TABLE(of, trimslice_of_match);

static struct platform_driver tegra_snd_trimslice_driver = {
    .driver = {
        .name = DRV_NAME,
        .owner = THIS_MODULE,
        .of_match_table = trimslice_of_match,
    },
    .probe = tegra_snd_trimslice_probe,
    .remove = __devexit_p(tegra_snd_trimslice_remove),
};
module_platform_driver(tegra_snd_trimslice_driver);

MODULE_AUTHOR("Mike Rapoport <[email protected]>");
MODULE_DESCRIPTION("Trimslice machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);