195 lines
4.8 KiB
C
195 lines
4.8 KiB
C
/*
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* Copyright (C) 2008-2016 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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/*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/i2c.h>
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#include <sound/soc.h>
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#include "imx-audmux.h"
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static int imx_audmux_config(int slave, int master)
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{
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unsigned int ptcr, pdcr;
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slave = slave - 1;
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master = master - 1;
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ptcr = IMX_AUDMUX_V2_PTCR_SYN |
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IMX_AUDMUX_V2_PTCR_TFSDIR |
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IMX_AUDMUX_V2_PTCR_TFSEL(slave) |
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IMX_AUDMUX_V2_PTCR_TCLKDIR |
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IMX_AUDMUX_V2_PTCR_TCSEL(slave);
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pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(slave);
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imx_audmux_v2_configure_port(master, ptcr, pdcr);
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/*
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* According to RM, RCLKDIR and SYN should not be changed at same time.
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* So separate to two step for configuring this port.
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*/
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ptcr |= IMX_AUDMUX_V2_PTCR_RFSDIR |
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IMX_AUDMUX_V2_PTCR_RFSEL(slave) |
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IMX_AUDMUX_V2_PTCR_RCLKDIR |
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IMX_AUDMUX_V2_PTCR_RCSEL(slave);
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imx_audmux_v2_configure_port(master, ptcr, pdcr);
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ptcr = IMX_AUDMUX_V2_PTCR_SYN;
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pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(master);
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imx_audmux_v2_configure_port(slave, ptcr, pdcr);
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return 0;
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}
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static int imx_si476x_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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int ret = 0;
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/* set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
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| SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
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if (ret) {
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dev_err(cpu_dai->dev, "failed to set dai fmt\n");
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return ret;
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}
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return ret;
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}
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static struct snd_soc_ops imx_si476x_ops = {
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.hw_params = imx_si476x_hw_params,
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};
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SND_SOC_DAILINK_DEFS(hifi,
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DAILINK_COMP_ARRAY(COMP_EMPTY()),
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DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "si476x-codec")),
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DAILINK_COMP_ARRAY(COMP_EMPTY()));
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static struct snd_soc_dai_link imx_dai = {
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.name = "imx-si476x",
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.stream_name = "imx-si476x",
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.ops = &imx_si476x_ops,
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SND_SOC_DAILINK_REG(hifi),
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};
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static struct snd_soc_card snd_soc_card_imx_3stack = {
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.name = "imx-audio-si476x",
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.dai_link = &imx_dai,
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.num_links = 1,
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.owner = THIS_MODULE,
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};
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static int imx_si476x_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &snd_soc_card_imx_3stack;
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struct device_node *ssi_np, *np = pdev->dev.of_node;
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struct platform_device *ssi_pdev;
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struct i2c_client *fm_dev;
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struct device_node *fm_np = NULL;
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int int_port, ext_port, ret;
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ret = of_property_read_u32(np, "mux-int-port", &int_port);
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if (ret) {
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dev_err(&pdev->dev, "mux-int-port missing or invalid\n");
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return ret;
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}
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ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
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if (ret) {
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dev_err(&pdev->dev, "mux-ext-port missing or invalid\n");
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return ret;
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}
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imx_audmux_config(int_port, ext_port);
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ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
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if (!ssi_np) {
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dev_err(&pdev->dev, "phandle missing or invalid\n");
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return -EINVAL;
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}
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ssi_pdev = of_find_device_by_node(ssi_np);
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if (!ssi_pdev) {
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dev_err(&pdev->dev, "failed to find SSI platform device\n");
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ret = -EINVAL;
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goto end;
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}
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fm_np = of_parse_phandle(pdev->dev.of_node, "fm-controller", 0);
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if (!fm_np) {
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dev_err(&pdev->dev, "phandle missing or invalid\n");
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ret = -EINVAL;
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goto end;
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}
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fm_dev = of_find_i2c_device_by_node(fm_np->parent);
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if (!fm_dev || !fm_dev->dev.driver) {
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dev_err(&pdev->dev, "failed to find FM platform device\n");
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ret = -EINVAL;
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goto end;
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}
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card->dev = &pdev->dev;
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card->dai_link->cpus->dai_name = dev_name(&ssi_pdev->dev);
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card->dai_link->platforms->of_node = ssi_np;
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card->dai_link->codecs->of_node = fm_np;
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platform_set_drvdata(pdev, card);
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ret = snd_soc_register_card(card);
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if (ret)
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dev_err(&pdev->dev, "Failed to register card: %d\n", ret);
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end:
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if (ssi_np)
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of_node_put(ssi_np);
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if (fm_np)
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of_node_put(fm_np);
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return ret;
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}
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static int imx_si476x_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &snd_soc_card_imx_3stack;
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snd_soc_unregister_card(card);
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return 0;
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}
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static const struct of_device_id imx_si476x_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-si476x", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_si476x_dt_ids);
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static struct platform_driver imx_si476x_driver = {
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.driver = {
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.name = "imx-tuner-si476x",
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.pm = &snd_soc_pm_ops,
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.of_match_table = imx_si476x_dt_ids,
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},
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.probe = imx_si476x_probe,
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.remove = imx_si476x_remove,
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};
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module_platform_driver(imx_si476x_driver);
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/* Module information */
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MODULE_AUTHOR("Freescale Semiconductor, Inc.");
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MODULE_DESCRIPTION("ALSA SoC i.MX si476x");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:imx-tuner-si476x");
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