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/*
* 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");
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