/*
   * Copyright (C) 2008-2014 Freescale Semiconductor, Inc. All Rights Reserved.
   */
  
  /*
   * The code contained herein is licensed under the GNU General Public
   * License. You may obtain a copy of the GNU General Public License
   * Version 2 or later at the following locations:
   *
   * http://www.opensource.org/licenses/gpl-license.html
   * http://www.gnu.org/copyleft/gpl.html
   */
  
  #include <linux/module.h>
  #include <linux/of_platform.h>
  #include <linux/i2c.h>
  #include <sound/soc.h>
  
  #include "imx-audmux.h"
  
  static int imx_audmux_config(int slave, int master)
  {
  	unsigned int ptcr, pdcr;
  	slave = slave - 1;
  	master = master - 1;
  
  	ptcr = IMX_AUDMUX_V2_PTCR_SYN |
  		IMX_AUDMUX_V2_PTCR_TFSDIR |
  		IMX_AUDMUX_V2_PTCR_TFSEL(slave) |
  		IMX_AUDMUX_V2_PTCR_TCLKDIR |
  		IMX_AUDMUX_V2_PTCR_TCSEL(slave);
  	pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(slave);
  	imx_audmux_v2_configure_port(master, ptcr, pdcr);
  
  	/*
  	 * According to RM, RCLKDIR and SYN should not be changed at same time.
  	 * So separate to two step for configuring this port.
  	 */
  	ptcr |= IMX_AUDMUX_V2_PTCR_RFSDIR |
  		IMX_AUDMUX_V2_PTCR_RFSEL(slave) |
  		IMX_AUDMUX_V2_PTCR_RCLKDIR |
  		IMX_AUDMUX_V2_PTCR_RCSEL(slave);
  	imx_audmux_v2_configure_port(master, ptcr, pdcr);
  
  	ptcr = IMX_AUDMUX_V2_PTCR_SYN;
  	pdcr = IMX_AUDMUX_V2_PDCR_RXDSEL(master);
  	imx_audmux_v2_configure_port(slave, ptcr, pdcr);
  
  	return 0;
  }
  
  static int imx_si476x_hw_params(struct snd_pcm_substream *substream,
  		struct snd_pcm_hw_params *params)
  {
  	struct snd_soc_pcm_runtime *rtd = substream->private_data;
  	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  	u32 channels = params_channels(params);
  	u32 rate = params_rate(params);
  	u32 bclk = rate * channels * 32;
  	int ret = 0;
  
  	/* set cpu DAI configuration */
  	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
  			| SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
  	if (ret) {
  		dev_err(cpu_dai->dev, "failed to set dai fmt
  ");
  		return ret;
  	}
  
  	ret = snd_soc_dai_set_tdm_slot(cpu_dai,
  			channels == 1 ? 0xfffffffe : 0xfffffffc,
  			channels == 1 ? 0xfffffffe : 0xfffffffc,
  			2, 32);
  	if (ret) {
  		dev_err(cpu_dai->dev, "failed to set dai tdm slot
  ");
  		return ret;
  	}
  
  	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, bclk, SND_SOC_CLOCK_OUT);
  	if (ret)
  		dev_err(cpu_dai->dev, "failed to set sysclk
  ");
  
  	return ret;
  }
  
  static struct snd_soc_ops imx_si476x_ops = {
  	.hw_params = imx_si476x_hw_params,
  };
  
  static struct snd_soc_dai_link imx_dai = {
  	.name = "imx-si476x",
  	.stream_name = "imx-si476x",
  	.codec_dai_name = "si476x-codec",
  	.ops = &imx_si476x_ops,
  };
  
  static struct snd_soc_card snd_soc_card_imx_3stack = {
  	.name = "imx-audio-si476x",
  	.dai_link = &imx_dai,
  	.num_links = 1,
  };
  
  static int imx_si476x_probe(struct platform_device *pdev)
  {
  	struct snd_soc_card *card = &snd_soc_card_imx_3stack;
  	struct device_node *ssi_np, *np = pdev->dev.of_node;
  	struct platform_device *ssi_pdev;
  	struct i2c_client *fm_dev;
  	struct device_node *fm_np;
  	int int_port, ext_port, ret;
  
  	ret = of_property_read_u32(np, "mux-int-port", &int_port);
  	if (ret) {
  		dev_err(&pdev->dev, "mux-int-port missing or invalid
  ");
  		return ret;
  	}
  
  	ret = of_property_read_u32(np, "mux-ext-port", &ext_port);
  	if (ret) {
  		dev_err(&pdev->dev, "mux-ext-port missing or invalid
  ");
  		return ret;
  	}
  
  	imx_audmux_config(int_port, ext_port);
  
  	ssi_np = of_parse_phandle(pdev->dev.of_node, "ssi-controller", 0);
  	if (!ssi_np) {
  		dev_err(&pdev->dev, "phandle missing or invalid
  ");
  		return -EINVAL;
  	}
  
  	ssi_pdev = of_find_device_by_node(ssi_np);
  	if (!ssi_pdev) {
  		dev_err(&pdev->dev, "failed to find SSI platform device
  ");
  		ret = -EINVAL;
  		goto end;
  	}
  
  	fm_np = of_parse_phandle(pdev->dev.of_node, "fm-controller", 0);
  	if (!fm_np) {
  		dev_err(&pdev->dev, "phandle missing or invalid
  ");
  		ret = -EINVAL;
  		goto end;
  	}
  
  	fm_dev = of_find_i2c_device_by_node(fm_np->parent);
  	if (!fm_dev || !fm_dev->dev.driver) {
  		dev_err(&pdev->dev, "failed to find FM platform device
  ");
  		ret = -EINVAL;
  		goto end;
  	}
  
  	card->dev = &pdev->dev;
  	card->dai_link->cpu_dai_name = dev_name(&ssi_pdev->dev);
  	card->dai_link->platform_of_node = ssi_np;
  	card->dai_link->codec_of_node = fm_np;
  
  	platform_set_drvdata(pdev, card);
  
  	ret = snd_soc_register_card(card);
  	if (ret)
  		dev_err(&pdev->dev, "Failed to register card: %d
  ", ret);
  
  end:
  	if (ssi_np)
  		of_node_put(ssi_np);
  	if (fm_np)
  		of_node_put(fm_np);
  
  	return ret;
  }
  
  static int imx_si476x_remove(struct platform_device *pdev)
  {
  	struct snd_soc_card *card = &snd_soc_card_imx_3stack;
  
  	snd_soc_unregister_card(card);
  
  	return 0;
  }
  
  static const struct of_device_id imx_si476x_dt_ids[] = {
  	{ .compatible = "fsl,imx-audio-si476x", },
  	{ /* sentinel */ }
  };
  MODULE_DEVICE_TABLE(of, imx_si476x_dt_ids);
  
  static struct platform_driver imx_si476x_driver = {
  	.driver = {
  		.name = "imx-tuner-si476x",
  		.owner = THIS_MODULE,
  		.pm = &snd_soc_pm_ops,
  		.of_match_table = imx_si476x_dt_ids,
  	},
  	.probe = imx_si476x_probe,
  	.remove = imx_si476x_remove,
  };
  
  module_platform_driver(imx_si476x_driver);
  
  /* Module information */
  MODULE_AUTHOR("Freescale Semiconductor, Inc.");
  MODULE_DESCRIPTION("ALSA SoC i.MX si476x");
  MODULE_LICENSE("GPL");
  MODULE_ALIAS("platform:imx-tuner-si476x");