ASoC: qcom: add apq8016 sound card support

This patch adds apq8016 machine driver support. This patch is tested on
DB410c and msm8916-mtp board for both hdmi and analog audio
features.

Acked-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 209 insertions, 0 deletions

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 938144c59e2b..807fedfa1c76 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -32,3 +32,12 @@ 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_SBC
+        tristate "SoC Audio support for APQ8016 SBC 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 ac7630833fe5..79e5c50a8f71 100644
--- a/sound/soc/qcom/Makefile
+++ b/sound/soc/qcom/Makefile
@@ -11,5 +11,7 @@ obj-$(CONFIG_SND_SOC_LPASS_APQ8016) += snd-soc-lpass-apq8016.o
 
 # Machine
 snd-soc-storm-objs := storm.o
+snd-soc-apq8016-sbc-objs := apq8016_sbc.o
 
 obj-$(CONFIG_SND_SOC_STORM) += snd-soc-storm.o
+obj-$(CONFIG_SND_SOC_APQ8016_SBC) += snd-soc-apq8016-sbc.o
diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
new file mode 100644
index 000000000000..1efdf0088ecd
--- /dev/null
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -0,0 +1,198 @@
+/*
+ * 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>
+#include <dt-bindings/sound/apq8016-lpass.h>
+
+struct apq8016_sbc_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 apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+        struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+        struct snd_soc_card *card = rtd->card;
+        struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
+        int rval = 0;
+
+        switch (cpu_dai->id) {
+        case MI2S_PRIMARY:
+                writel(readl(pdata->spkr_iomux) | SPKR_CTL_PRI_WS_SLAVE_SEL_11,
+                        pdata->spkr_iomux);
+                break;
+
+        case MI2S_QUATERNARY:
+                /* 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);
+                break;
+
+        default:
+                dev_err(card->dev, "unsupported cpu dai configuration\n");
+                rval = -EINVAL;
+                break;
+
+        }
+
+        return rval;
+}
+
+static struct apq8016_sbc_data *apq8016_sbc_parse_of(struct snd_soc_card *card)
+{
+        struct device *dev = card->dev;
+        struct snd_soc_dai_link *link;
+        struct device_node *np, *codec, *cpu, *node  = dev->of_node;
+        struct apq8016_sbc_data *data;
+        int ret, num_links;
+
+        ret = snd_soc_of_parse_card_name(card, "qcom,model");
+        if (ret) {
+                dev_err(dev, "Error parsing card name: %d\n", ret);
+                return ERR_PTR(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(*link) * num_links,
+                            GFP_KERNEL);
+        if (!data)
+                return ERR_PTR(-ENOMEM);
+
+        card->dai_link  = &data->dai_link[0];
+        card->num_links = num_links;
+
+        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);
+                }
+
+                link->cpu_of_node = of_parse_phandle(cpu, "sound-dai", 0);
+                if (!link->cpu_of_node) {
+                        dev_err(card->dev, "error getting cpu phandle\n");
+                        return ERR_PTR(-EINVAL);
+                }
+
+                link->codec_of_node = of_parse_phandle(codec, "sound-dai", 0);
+                if (!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, &link->cpu_dai_name);
+                if (ret) {
+                        dev_err(card->dev, "error getting cpu dai name\n");
+                        return ERR_PTR(ret);
+                }
+
+                ret = snd_soc_of_get_dai_name(codec, &link->codec_dai_name);
+                if (ret) {
+                        dev_err(card->dev, "error getting codec dai name\n");
+                        return ERR_PTR(ret);
+                }
+
+                link->platform_of_node = link->cpu_of_node;
+                /* For now we only support playback */
+                link->playback_only = true;
+
+                ret = of_property_read_string(np, "link-name", &link->name);
+                if (ret) {
+                        dev_err(card->dev, "error getting codec dai_link name\n");
+                        return ERR_PTR(ret);
+                }
+
+                link->stream_name = link->name;
+                link->init = apq8016_sbc_dai_init;
+                link++;
+        }
+
+        return data;
+}
+
+static int apq8016_sbc_platform_probe(struct platform_device *pdev)
+{
+        struct device *dev = &pdev->dev;
+        struct snd_soc_card *card;
+        struct apq8016_sbc_data *data;
+        struct resource *res;
+
+        card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+        if (!card)
+                return -ENOMEM;
+
+        card->dev = dev;
+        data = apq8016_sbc_parse_of(card);
+        if (IS_ERR(data)) {
+                dev_err(&pdev->dev, "Error resolving dai links: %ld\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);
+
+        return devm_snd_soc_register_card(&pdev->dev, card);
+}
+
+static const struct of_device_id apq8016_sbc_device_id[]  = {
+        { .compatible = "qcom,apq8016-sbc-sndcard" },
+        {},
+};
+MODULE_DEVICE_TABLE(of, apq8016_sbc_device_id);
+
+static struct platform_driver apq8016_sbc_platform_driver = {
+        .driver = {
+                .name = "qcom-apq8016-sbc",
+                .of_match_table = of_match_ptr(apq8016_sbc_device_id),
+        },
+        .probe = apq8016_sbc_platform_probe,
+};
+module_platform_driver(apq8016_sbc_platform_driver);
+
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_DESCRIPTION("APQ8016 ASoC Machine Driver");
+MODULE_LICENSE("GPL v2");