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    Subject[RFC PATCH 12/14] ASoC: qcom: add apq8016 sound card support
    Date
    This patch adds apq8016 machine driver support. This patch was tested on
    two apq8016-sbc and msm8916-mtp board for both hdmi and analog audio
    features.

    Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    ---
    sound/soc/qcom/Kconfig | 9 ++
    sound/soc/qcom/Makefile | 1 +
    sound/soc/qcom/apq8016.c | 214 +++++++++++++++++++++++++++++++++++++++++++++++
    3 files changed, 224 insertions(+)
    create mode 100644 sound/soc/qcom/apq8016.c

    diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
    index 2a06d1e..7227383 100644
    --- a/sound/soc/qcom/Kconfig
    +++ b/sound/soc/qcom/Kconfig
    @@ -35,3 +35,12 @@ config SND_SOC_STORM
    help
    Say Y or M if you want add support for SoC audio on the
    Qualcomm Technologies IPQ806X-based Storm board.
    +
    +config SND_SOC_APQ8016
    + tristate "SoC Audio support for APQ8016 based platforms"
    + depends on SND_SOC_QCOM || ARCH_QCOM || COMPILE_TEST
    + select SND_SOC_LPASS_APQ8016
    + help
    + Support for Qualcomm Technologies LPASS audio block in
    + APQ8016 SOC-based systems.
    + Say Y if you want to use audio devices on MI2S
    diff --git a/sound/soc/qcom/Makefile b/sound/soc/qcom/Makefile
    index ac76308..589ee9b 100644
    --- a/sound/soc/qcom/Makefile
    +++ b/sound/soc/qcom/Makefile
    @@ -13,3 +13,4 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
    snd-soc-storm-objs := storm.o

    obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
    +obj-$(CONFIG_SND_SOC_APQ8016) += apq8016.o
    diff --git a/sound/soc/qcom/apq8016.c b/sound/soc/qcom/apq8016.c
    new file mode 100644
    index 0000000..cfb6930
    --- /dev/null
    +++ b/sound/soc/qcom/apq8016.c
    @@ -0,0 +1,214 @@
    +/*
    + * Copyright (c) 2015 The Linux Foundation. All rights reserved.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 and
    + * only 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.
    + *
    + */
    +
    +#include <linux/device.h>
    +#include <linux/module.h>
    +#include <linux/kernel.h>
    +#include <linux/io.h>
    +#include <linux/of.h>
    +#include <linux/clk.h>
    +#include <linux/platform_device.h>
    +#include <sound/pcm.h>
    +#include <sound/pcm_params.h>
    +#include <sound/soc.h>
    +
    +struct apq8016_card_data {
    + void __iomem *mic_iomux;
    + void __iomem *spkr_iomux;
    + struct snd_soc_dai_link dai_link[]; /* dynamically allocated */
    +};
    +
    +#define MIC_CTRL_QUA_WS_SLAVE_SEL_10 BIT(17)
    +#define MIC_CTRL_TLMM_SCLK_EN BIT(1)
    +#define SPKR_CTL_PRI_WS_SLAVE_SEL_11 (BIT(17) | BIT(16))
    +
    +static int msm_ext_mi2s_snd_startup(struct snd_pcm_substream *substream)
    +{
    + struct snd_soc_pcm_runtime *rtd = substream->private_data;
    + struct snd_soc_card *card = rtd->card;
    + struct apq8016_card_data *pdata = snd_soc_card_get_drvdata(card);
    +
    + /* Configure the Quat MI2S to TLMM */
    + writel(readl(pdata->mic_iomux) |
    + MIC_CTRL_QUA_WS_SLAVE_SEL_10 |
    + MIC_CTRL_TLMM_SCLK_EN,
    + pdata->mic_iomux);
    +
    + return 0;
    +}
    +
    +static int msm_int_mi2s_snd_startup(struct snd_pcm_substream *substream)
    +{
    + struct snd_soc_pcm_runtime *rtd = substream->private_data;
    + struct snd_soc_card *card = rtd->card;
    + struct apq8016_card_data *pdata = snd_soc_card_get_drvdata(card);
    +
    + writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
    + pdata->spkr_iomux);
    +
    + return 0;
    +}
    +static struct snd_soc_ops qcom_internal_codec_soc_ops = {
    + .startup = msm_int_mi2s_snd_startup,
    +};
    +
    +static struct snd_soc_ops qcom_external_codec_soc_ops = {
    + .startup = msm_ext_mi2s_snd_startup,
    +};
    +
    +static struct snd_soc_card qcom_soc_card = {
    + .name = "apq8016",
    +};
    +
    +static struct apq8016_card_data *qcom_parse_of(struct snd_soc_card *card)
    +{
    + int num_links;
    + struct device *dev = card->dev;
    + struct snd_soc_dai_link *dai_link;
    + struct device_node *np, *codec, *cpu, *node = dev->of_node;
    + struct apq8016_card_data *data;
    + char *name;
    + int ret;
    +
    + /* Populate links */
    + num_links = of_get_child_count(node);
    +
    + /* Allocate the private data and the DAI link array */
    + data = devm_kzalloc(dev, sizeof(*data) + sizeof(*dai_link) * num_links,
    + GFP_KERNEL);
    + if (!data)
    + return ERR_PTR(-ENOMEM);
    +
    + card->dai_link = &data->dai_link[0];
    + card->num_links = num_links;
    +
    + dai_link = data->dai_link;
    +
    + for_each_child_of_node(node, np) {
    + cpu = of_get_child_by_name(np, "cpu");
    + codec = of_get_child_by_name(np, "codec");
    +
    + if (!cpu || !codec) {
    + dev_err(dev, "Can't find cpu/codec DT node\n");
    + return ERR_PTR(-EINVAL);
    + }
    +
    + dai_link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
    + if (!dai_link->cpu_of_node) {
    + dev_err(card->dev, "error getting cpu phandle\n");
    + return ERR_PTR(-EINVAL);
    + }
    +
    + dai_link->codec_of_node = of_parse_phandle(codec,
    + "sound-dai",
    + 0);
    + if (!dai_link->codec_of_node) {
    + dev_err(card->dev, "error getting codec phandle\n");
    + return ERR_PTR(-EINVAL);
    + }
    +
    + ret = snd_soc_of_get_dai_name(cpu, &dai_link->cpu_dai_name);
    + if (ret)
    + return ERR_PTR(ret);
    +
    + ret = snd_soc_of_get_dai_name(codec, &dai_link->codec_dai_name);
    + if (ret)
    + return ERR_PTR(ret);
    +
    + dai_link->platform_of_node = dai_link->cpu_of_node;
    + /* For now we only support playback */
    + dai_link->playback_only = true;
    +
    + if (of_property_read_bool(np, "external")) {
    + name = "HDMI";
    + dai_link->ops = &qcom_external_codec_soc_ops;
    +
    + } else {
    + name = "Headset";
    + dai_link->ops = &qcom_internal_codec_soc_ops;
    + }
    +
    + dai_link->name = dai_link->stream_name = name;
    +
    + dai_link++;
    + }
    +
    + return data;
    +}
    +
    +static int qcom_platform_probe(struct platform_device *pdev)
    +{
    + struct device *dev = &pdev->dev;
    + struct snd_soc_card *card = &qcom_soc_card;
    + struct apq8016_card_data *data;
    + struct resource *res;
    + int ret;
    +
    + card->dev = dev;
    + data = qcom_parse_of(card);
    + if (PTR_ERR(data)) {
    + dev_err(&pdev->dev, "Error resolving dai links: %d\n",
    + PTR_ERR(data));
    + return PTR_ERR(data);
    + }
    +
    + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mic-iomux");
    + data->mic_iomux = devm_ioremap_resource(dev, res);
    + if (IS_ERR(data->mic_iomux))
    + return PTR_ERR(data->mic_iomux);
    +
    + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "spkr-iomux");
    + data->spkr_iomux = devm_ioremap_resource(dev, res);
    + if (IS_ERR(data->spkr_iomux))
    + return PTR_ERR(data->spkr_iomux);
    +
    + platform_set_drvdata(pdev, data);
    + snd_soc_card_set_drvdata(card, data);
    +
    + ret = snd_soc_of_parse_card_name(card, "qcom,model");
    + if (ret) {
    + dev_err(&pdev->dev, "Error parsing card name: %d\n", ret);
    + return ret;
    + }
    +
    + ret = devm_snd_soc_register_card(&pdev->dev, card);
    + if (ret == -EPROBE_DEFER) {
    + card->dev = NULL;
    + return ret;
    + } else if (ret) {
    + dev_err(&pdev->dev, "Error registering soundcard: %d\n", ret);
    + return ret;
    + }
    +
    + return 0;
    +}
    +
    +static const struct of_device_id qcom_device_id[] = {
    + { .compatible = "qcom,apq8016-sndcard" },
    + {},
    +};
    +MODULE_DEVICE_TABLE(of, qcom_device_id);
    +
    +static struct platform_driver qcom_platform_driver = {
    + .driver = {
    + .name = "qcom-apq8016",
    + .of_match_table = of_match_ptr(qcom_device_id),
    + },
    + .probe = qcom_platform_probe,
    +};
    +module_platform_driver(qcom_platform_driver);
    +
    +MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
    +MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
    +MODULE_LICENSE("GPL v2");
    --
    1.9.1


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