--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff