/*
   * Toshiba TC6387XB support
   * Copyright (c) 2005 Ian Molton
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   * This file contains TC6387XB base support.
   *
   */
  
  #include <linux/module.h>
  #include <linux/platform_device.h>

  #include <linux/clk.h>

  #include <linux/err.h>
  #include <linux/mfd/core.h>
  #include <linux/mfd/tmio.h>
  #include <linux/mfd/tc6387xb.h>

  #include <linux/slab.h>

  enum {
  	TC6387XB_CELL_MMC,
  };

  struct tc6387xb {
  	void __iomem *scr;
  	struct clk *clk32k;
  	struct resource rscr;
  };
  
  static struct resource tc6387xb_mmc_resources[] = {
  	{
  		.start = 0x800,
  		.end   = 0x9ff,
  		.flags = IORESOURCE_MEM,
  	},
  	{
  		.start = 0,
  		.end   = 0,
  		.flags = IORESOURCE_IRQ,
  	},
  };
  
  /*--------------------------------------------------------------------------*/

  #ifdef CONFIG_PM
  static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
  {

  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);

  	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);

  
  	if (pdata && pdata->suspend)
  		pdata->suspend(dev);

  	clk_disable_unprepare(tc6387xb->clk32k);

  
  	return 0;
  }
  
  static int tc6387xb_resume(struct platform_device *dev)
  {

  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);

  	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);

  	clk_prepare_enable(tc6387xb->clk32k);

  	if (pdata && pdata->resume)
  		pdata->resume(dev);

  	tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
  		tc6387xb_mmc_resources[0].start & 0xfffe);

  	return 0;
  }
  #else
  #define tc6387xb_suspend  NULL
  #define tc6387xb_resume   NULL
  #endif
  
  /*--------------------------------------------------------------------------*/

  static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
  {
  	struct platform_device *dev = to_platform_device(mmc->dev.parent);
  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
  
  	tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
  }
  
  static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
  {
  	struct platform_device *dev = to_platform_device(mmc->dev.parent);
  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
  
  	tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
  }

  static int tc6387xb_mmc_enable(struct platform_device *mmc)
  {
  	struct platform_device *dev      = to_platform_device(mmc->dev.parent);

  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);

  	clk_prepare_enable(tc6387xb->clk32k);

  
  	tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
  		tc6387xb_mmc_resources[0].start & 0xfffe);

  
  	return 0;
  }
  
  static int tc6387xb_mmc_disable(struct platform_device *mmc)
  {
  	struct platform_device *dev      = to_platform_device(mmc->dev.parent);

  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);

  	clk_disable_unprepare(tc6387xb->clk32k);

  
  	return 0;
  }

  static struct tmio_mmc_data tc6387xb_mmc_data = {

  	.hclk = 24000000,

  	.set_pwr = tc6387xb_mmc_pwr,
  	.set_clk_div = tc6387xb_mmc_clk_div,

  };

  /*--------------------------------------------------------------------------*/

  static const struct mfd_cell tc6387xb_cells[] = {

  	[TC6387XB_CELL_MMC] = {

  		.name = "tmio-mmc",
  		.enable = tc6387xb_mmc_enable,
  		.disable = tc6387xb_mmc_disable,

  		.platform_data = &tc6387xb_mmc_data,
  		.pdata_size    = sizeof(tc6387xb_mmc_data),

  		.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
  		.resources = tc6387xb_mmc_resources,
  	},
  };

  static int tc6387xb_probe(struct platform_device *dev)

  {

  	struct tc6387xb_platform_data *pdata = dev_get_platdata(&dev->dev);

  	struct resource *iomem, *rscr;

  	struct clk *clk32k;

  	struct tc6387xb *tc6387xb;

  	int irq, ret;
  
  	iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);

  	if (!iomem)

  		return -EINVAL;

  	tc6387xb = kzalloc(sizeof(*tc6387xb), GFP_KERNEL);

  	if (!tc6387xb)
  		return -ENOMEM;

  	ret  = platform_get_irq(dev, 0);
  	if (ret >= 0)
  		irq = ret;
  	else

  		goto err_no_irq;

  	clk32k = clk_get(&dev->dev, "CLK_CK32K");
  	if (IS_ERR(clk32k)) {
  		ret = PTR_ERR(clk32k);

  		goto err_no_clk;
  	}
  
  	rscr = &tc6387xb->rscr;
  	rscr->name = "tc6387xb-core";
  	rscr->start = iomem->start;
  	rscr->end = iomem->start + 0xff;
  	rscr->flags = IORESOURCE_MEM;
  
  	ret = request_resource(iomem, rscr);
  	if (ret)

  		goto err_resource;

  	tc6387xb->scr = ioremap(rscr->start, resource_size(rscr));

  	if (!tc6387xb->scr) {
  		ret = -ENOMEM;
  		goto err_ioremap;

  	}

  
  	tc6387xb->clk32k = clk32k;
  	platform_set_drvdata(dev, tc6387xb);

  
  	if (pdata && pdata->enable)
  		pdata->enable(dev);

  	dev_info(&dev->dev, "Toshiba tc6387xb initialised
  ");

  	ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,

  			      ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL);

  
  	if (!ret)
  		return 0;

  	iounmap(tc6387xb->scr);

  err_ioremap:
  	release_resource(&tc6387xb->rscr);

  err_resource:

  	clk_put(clk32k);
  err_no_clk:
  err_no_irq:
  	kfree(tc6387xb);

  	return ret;
  }

  static int tc6387xb_remove(struct platform_device *dev)

  {

  	struct tc6387xb *tc6387xb = platform_get_drvdata(dev);

  	mfd_remove_devices(&dev->dev);

  	iounmap(tc6387xb->scr);
  	release_resource(&tc6387xb->rscr);

  	clk_disable_unprepare(tc6387xb->clk32k);

  	clk_put(tc6387xb->clk32k);

  	kfree(tc6387xb);

  
  	return 0;
  }
  
  
  static struct platform_driver tc6387xb_platform_driver = {
  	.driver = {
  		.name		= "tc6387xb",
  	},
  	.probe		= tc6387xb_probe,

  	.remove		= tc6387xb_remove,

  	.suspend        = tc6387xb_suspend,
  	.resume         = tc6387xb_resume,
  };

  module_platform_driver(tc6387xb_platform_driver);

  
  MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
  MODULE_LICENSE("GPL v2");
  MODULE_AUTHOR("Ian Molton");
  MODULE_ALIAS("platform:tc6387xb");