/*
 * arch/arm/mach-ns9xxx/plat-uio.c
 *
 * Copyright (C) 2008 by Digi International Inc.
 * 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 as published by
 * the Free Software Foundation.
 */
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/uio_driver.h>

#include <asm/mach-types.h>

#include "clock.h"

#define DRIVER_NAME "uio"

struct ns9xxx_uio_platdata {
	struct uio_info uioinfo;
	struct clk clk;
};

static struct platform_device *__init ns9xxx_plat_uio_alloc(
		struct ns9xxx_uio_platdata **pdata)
{
	struct platform_device *pdev;
	static int id;

	BUG_ON(!pdata);

	pdev = platform_device_alloc(DRIVER_NAME, id);
	if (!pdev)
		goto err;

	*pdata = kzalloc(sizeof(**pdata), GFP_KERNEL);
	if (!*pdata) {
err:
		platform_device_put(pdev);
		return ERR_PTR(-ENOMEM);
	}

	(*pdata)->clk.owner = THIS_MODULE;
	(*pdata)->clk.name = DRIVER_NAME;
	(*pdata)->clk.id = id;

	pdev->dev.platform_data = *pdata;

	++id;

	return pdev;
}

static int __init ns9xxx_plat_uio_inc20otter_init(void)
{
	struct ns9xxx_uio_platdata *uninitialized_var(pdata);
	struct platform_device *pdev = ns9xxx_plat_uio_alloc(&pdata);
	struct resource res[] = {
		{
			.start = 0x70000000,
			.end = 0x70001fff,
			.flags = IORESOURCE_MEM,
		}, {
			.start = 0xa0700000,
			.end = 0xa070027b,
			.flags = IORESOURCE_MEM,
		}
	};
	int ret;

	if (IS_ERR(pdev)) {
		ret = PTR_ERR(pdev);
		pr_debug("%s: err_alloc_pdev -> %d\n", __func__, ret);
		goto err_alloc_pdev;
	}

	ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
	if (ret) {
		pr_debug("%s: err_add_resources -> %d\n", __func__, ret);
		goto err_add_resources;
	}

	ret = clk_register(&pdata->clk);
	if (ret) {
		pr_debug("%s: err_clk_register -> %d", __func__, ret);
		goto err_clk_register;
	}

	pdata->uioinfo.name = "inc20otter CS3";
	pdata->uioinfo.version = "0.0a";
	pdata->uioinfo.irq = UIO_IRQ_NONE;

	ret = platform_device_add(pdev);
	if (ret) {

		clk_unregister(&pdata->clk);
err_clk_register:
err_add_resources:

		/* this kfrees pdata, too */
		platform_device_put(pdev);
err_alloc_pdev:
		return ret;
	}

	return 0;
}


static int __init ns9xxx_plat_uio_init(void)
{
	if (machine_is_inc20otter())
		ns9xxx_plat_uio_inc20otter_init();

	return 0;
}

arch_initcall(ns9xxx_plat_uio_init);