diff options
Diffstat (limited to 'kernel/sound/soc/qcom/apq8016_sbc.c')
| -rw-r--r-- | kernel/sound/soc/qcom/apq8016_sbc.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/kernel/sound/soc/qcom/apq8016_sbc.c b/kernel/sound/soc/qcom/apq8016_sbc.c new file mode 100644 index 000000000..1efdf0088 --- /dev/null +++ b/kernel/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"); |