// SPDX-License-Identifier: GPL-2.0-or-later

  /*
   * DaVinci Voice Codec Core Interface for TI platforms
   *
   * Copyright (C) 2010 Texas Instruments, Inc
   *
   * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>

   */
  
  #include <linux/init.h>
  #include <linux/module.h>
  #include <linux/device.h>

  #include <linux/slab.h>

  #include <linux/delay.h>
  #include <linux/io.h>
  #include <linux/clk.h>

  #include <linux/regmap.h>

  
  #include <sound/pcm.h>
  
  #include <linux/mfd/davinci_voicecodec.h>

  static const struct regmap_config davinci_vc_regmap = {

  	.reg_bits = 32,
  	.val_bits = 32,
  };

  static int __init davinci_vc_probe(struct platform_device *pdev)
  {
  	struct davinci_vc *davinci_vc;

  	struct resource *res;

  	struct mfd_cell *cell = NULL;

  	dma_addr_t fifo_base;

  	int ret;

  	davinci_vc = devm_kzalloc(&pdev->dev,
  				  sizeof(struct davinci_vc), GFP_KERNEL);

  	if (!davinci_vc)

  		return -ENOMEM;

  	davinci_vc->clk = devm_clk_get(&pdev->dev, NULL);

  	if (IS_ERR(davinci_vc->clk)) {
  		dev_dbg(&pdev->dev,
  			    "could not get the clock for voice codec
  ");

  		return -ENODEV;

  	}
  	clk_enable(davinci_vc->clk);
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

  	fifo_base = (dma_addr_t)res->start;

  	davinci_vc->base = devm_ioremap_resource(&pdev->dev, res);
  	if (IS_ERR(davinci_vc->base)) {
  		ret = PTR_ERR(davinci_vc->base);
  		goto fail;

  	}

  	davinci_vc->regmap = devm_regmap_init_mmio(&pdev->dev,
  						   davinci_vc->base,
  						   &davinci_vc_regmap);
  	if (IS_ERR(davinci_vc->regmap)) {
  		ret = PTR_ERR(davinci_vc->regmap);
  		goto fail;
  	}

  	res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
  	if (!res) {
  		dev_err(&pdev->dev, "no DMA resource
  ");

  		ret = -ENXIO;

  		goto fail;

  	}
  
  	davinci_vc->davinci_vcif.dma_tx_channel = res->start;

  	davinci_vc->davinci_vcif.dma_tx_addr = fifo_base + DAVINCI_VC_WFIFO;

  
  	res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
  	if (!res) {
  		dev_err(&pdev->dev, "no DMA resource
  ");

  		ret = -ENXIO;

  		goto fail;

  	}
  
  	davinci_vc->davinci_vcif.dma_rx_channel = res->start;

  	davinci_vc->davinci_vcif.dma_rx_addr = fifo_base + DAVINCI_VC_RFIFO;

  
  	davinci_vc->dev = &pdev->dev;
  	davinci_vc->pdev = pdev;
  
  	/* Voice codec interface client */
  	cell = &davinci_vc->cells[DAVINCI_VC_VCIF_CELL];

  	cell->name = "davinci-vcif";

  	cell->platform_data = davinci_vc;
  	cell->pdata_size = sizeof(*davinci_vc);

  
  	/* Voice codec CQ93VC client */
  	cell = &davinci_vc->cells[DAVINCI_VC_CQ93VC_CELL];

  	cell->name = "cq93vc-codec";

  	cell->platform_data = davinci_vc;
  	cell->pdata_size = sizeof(*davinci_vc);

  
  	ret = mfd_add_devices(&pdev->dev, pdev->id, davinci_vc->cells,

  			      DAVINCI_VC_CELLS, NULL, 0, NULL);

  	if (ret != 0) {
  		dev_err(&pdev->dev, "fail to register client devices
  ");

  		goto fail;

  	}
  
  	return 0;

  fail:

  	clk_disable(davinci_vc->clk);

  
  	return ret;
  }

  static int davinci_vc_remove(struct platform_device *pdev)

  {
  	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
  
  	mfd_remove_devices(&pdev->dev);

  	clk_disable(davinci_vc->clk);

  	return 0;
  }
  
  static struct platform_driver davinci_vc_driver = {
  	.driver	= {
  		.name = "davinci_voicecodec",

  	},

  	.remove	= davinci_vc_remove,

  };

  module_platform_driver_probe(davinci_vc_driver, davinci_vc_probe);

  
  MODULE_AUTHOR("Miguel Aguilar");
  MODULE_DESCRIPTION("Texas Instruments DaVinci Voice Codec Core Interface");
  MODULE_LICENSE("GPL");