[linux-2.6-block.git] / drivers / mtd / nand / denali_dt.c

/*
 * NAND Flash Controller Device Driver for DT
 *
 * Copyright © 2011, Picochip.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/slab.h>

#include "denali.h"

struct denali_dt {
	struct denali_nand_info	denali;
	struct clk		*clk;
};

static const struct of_device_id denali_nand_dt_ids[] = {
		{ .compatible = "denali,denali-nand-dt" },
		{ /* sentinel */ }
	};

MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);

static u64 denali_dma_mask;

static int denali_dt_probe(struct platform_device *ofdev)
{
	struct resource *denali_reg, *nand_data;
	struct denali_dt *dt;
	struct denali_nand_info *denali;
	int ret;
	const struct of_device_id *of_id;

	of_id = of_match_device(denali_nand_dt_ids, &ofdev->dev);
	if (of_id) {
		ofdev->id_entry = of_id->data;
	} else {
		pr_err("Failed to find the right device id.\n");
		return -ENOMEM;
	}

	dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL);
	if (!dt)
		return -ENOMEM;
	denali = &dt->denali;

	denali->platform = DT;
	denali->dev = &ofdev->dev;
	denali->irq = platform_get_irq(ofdev, 0);
	if (denali->irq < 0) {
		dev_err(&ofdev->dev, "no irq defined\n");
		return denali->irq;
	}

	denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg");
	denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg);
	if (IS_ERR(denali->flash_reg))
		return PTR_ERR(denali->flash_reg);

	nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data");
	denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data);
	if (IS_ERR(denali->flash_mem))
		return PTR_ERR(denali->flash_mem);

	if (!of_property_read_u32(ofdev->dev.of_node,
		"dma-mask", (u32 *)&denali_dma_mask)) {
		denali->dev->dma_mask = &denali_dma_mask;
	} else {
		denali->dev->dma_mask = NULL;
	}

	dt->clk = devm_clk_get(&ofdev->dev, NULL);
	if (IS_ERR(dt->clk)) {
		dev_err(&ofdev->dev, "no clk available\n");
		return PTR_ERR(dt->clk);
	}
	clk_prepare_enable(dt->clk);

	ret = denali_init(denali);
	if (ret)
		goto out_disable_clk;

	platform_set_drvdata(ofdev, dt);
	return 0;

out_disable_clk:
	clk_disable_unprepare(dt->clk);

	return ret;
}

static int denali_dt_remove(struct platform_device *ofdev)
{
	struct denali_dt *dt = platform_get_drvdata(ofdev);

	denali_remove(&dt->denali);
	clk_disable(dt->clk);

	return 0;
}

static struct platform_driver denali_dt_driver = {
	.probe		= denali_dt_probe,
	.remove		= denali_dt_remove,
	.driver		= {
		.name	= "denali-nand-dt",
		.of_match_table	= denali_nand_dt_ids,
	},
};

module_platform_driver(denali_dt_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jamie Iles");
MODULE_DESCRIPTION("DT driver for Denali NAND controller");
Commit	Line	Data
30f9f2fb DN	1	/*
	2	* NAND Flash Controller Device Driver for DT
	3	*
	4	* Copyright © 2011, Picochip.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*/
	15	#include <linux/clk.h>
	16	#include <linux/err.h>
	17	#include <linux/io.h>
	18	#include <linux/ioport.h>
	19	#include <linux/kernel.h>
	20	#include <linux/module.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/of.h>
	23	#include <linux/of_device.h>
	24	#include <linux/slab.h>
	25
	26	#include "denali.h"
	27
	28	struct denali_dt {
	29	struct denali_nand_info denali;
	30	struct clk *clk;
	31	};
	32
30f9f2fb DN	33	static const struct of_device_id denali_nand_dt_ids[] = {
	34	{ .compatible = "denali,denali-nand-dt" },
	35	{ /* sentinel */ }
	36	};
	37
	38	MODULE_DEVICE_TABLE(of, denali_nand_dt_ids);
	39
	40	static u64 denali_dma_mask;
	41
06f25510	42	static int denali_dt_probe(struct platform_device *ofdev)
30f9f2fb DN	43	{
	44	struct resource denali_reg, nand_data;
	45	struct denali_dt *dt;
	46	struct denali_nand_info *denali;
	47	int ret;
	48	const struct of_device_id *of_id;
	49
	50	of_id = of_match_device(denali_nand_dt_ids, &ofdev->dev);
	51	if (of_id) {
	52	ofdev->id_entry = of_id->data;
	53	} else {
	54	pr_err("Failed to find the right device id.\n");
	55	return -ENOMEM;
	56	}
	57
	58	dt = devm_kzalloc(&ofdev->dev, sizeof(*dt), GFP_KERNEL);
	59	if (!dt)
	60	return -ENOMEM;
	61	denali = &dt->denali;
	62
30f9f2fb DN	63	denali->platform = DT;
	64	denali->dev = &ofdev->dev;
	65	denali->irq = platform_get_irq(ofdev, 0);
	66	if (denali->irq < 0) {
	67	dev_err(&ofdev->dev, "no irq defined\n");
2f2ff14c	68	return denali->irq;
30f9f2fb DN	69	}
30f9f2fb DN	70
7995204e JH	71	denali_reg = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "denali_reg");
	72	denali->flash_reg = devm_ioremap_resource(&ofdev->dev, denali_reg);
	73	if (IS_ERR(denali->flash_reg))
	74	return PTR_ERR(denali->flash_reg);
30f9f2fb	75
7995204e JH	76	nand_data = platform_get_resource_byname(ofdev, IORESOURCE_MEM, "nand_data");
	77	denali->flash_mem = devm_ioremap_resource(&ofdev->dev, nand_data);
	78	if (IS_ERR(denali->flash_mem))
	79	return PTR_ERR(denali->flash_mem);
30f9f2fb DN	80
	81	if (!of_property_read_u32(ofdev->dev.of_node,
	82	"dma-mask", (u32 *)&denali_dma_mask)) {
	83	denali->dev->dma_mask = &denali_dma_mask;
	84	} else {
	85	denali->dev->dma_mask = NULL;
	86	}
	87
2281f7b6	88	dt->clk = devm_clk_get(&ofdev->dev, NULL);
30f9f2fb DN	89	if (IS_ERR(dt->clk)) {
	90	dev_err(&ofdev->dev, "no clk available\n");
	91	return PTR_ERR(dt->clk);
	92	}
	93	clk_prepare_enable(dt->clk);
	94
	95	ret = denali_init(denali);
	96	if (ret)
	97	goto out_disable_clk;
	98
	99	platform_set_drvdata(ofdev, dt);
	100	return 0;
	101
	102	out_disable_clk:
	103	clk_disable_unprepare(dt->clk);
30f9f2fb DN	104
	105	return ret;
	106	}
	107
810b7e06	108	static int denali_dt_remove(struct platform_device *ofdev)
30f9f2fb DN	109	{
	110	struct denali_dt *dt = platform_get_drvdata(ofdev);
	111
	112	denali_remove(&dt->denali);
	113	clk_disable(dt->clk);
30f9f2fb DN	114
	115	return 0;
	116	}
	117
	118	static struct platform_driver denali_dt_driver = {
	119	.probe = denali_dt_probe,
5153b88c	120	.remove = denali_dt_remove,
30f9f2fb DN	121	.driver = {
30f9f2fb DN	122	.name = "denali-nand-dt",
ef54f873	123	.of_match_table = denali_nand_dt_ids,
30f9f2fb DN	124	},
	125	};
	126
82fc812c	127	module_platform_driver(denali_dt_driver);
30f9f2fb DN	128
	129	MODULE_LICENSE("GPL");
	130	MODULE_AUTHOR("Jamie Iles");
	131	MODULE_DESCRIPTION("DT driver for Denali NAND controller");