/* arch/arm/mach-msm/nand_partitions.c
 *
 * Code to extract partition information from ATAG set up by the
 * bootloader.
 *
 * Copyright (C) 2007 Google, Inc.
 * Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
 * Author: Brian Swetland <swetland@google.com>
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that 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/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>

#include <asm/mach/flash.h>
#include <linux/io.h>

#include <asm/setup.h>

#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>

#include <mach/msm_iomap.h>

#include <mach/board.h>


/* configuration tags specific to msm */

#define ATAG_MSM_PARTITION 0x4d534D70 /* MSMp */

struct msm_ptbl_entry {
	char name[16];
	__u32 offset;
	__u32 size;
	__u32 flags;
};

#define MSM_MAX_PARTITIONS 8

static struct mtd_partition msm_nand_partitions[MSM_MAX_PARTITIONS];
static char msm_nand_names[MSM_MAX_PARTITIONS * 16];

extern struct flash_platform_data msm_nand_data;

static int __init parse_tag_msm_partition(const struct tag *tag)
{
	struct mtd_partition *ptn = msm_nand_partitions;
	char *name = msm_nand_names;
	struct msm_ptbl_entry *entry = (void *) &tag->u;
	unsigned count, n;

	count = (tag->hdr.size - 2) /
		(sizeof(struct msm_ptbl_entry) / sizeof(__u32));

	if (count > MSM_MAX_PARTITIONS)
		count = MSM_MAX_PARTITIONS;

	for (n = 0; n < count; n++) {
		memcpy(name, entry->name, 15);
		name[15] = 0;

		ptn->name = name;
		ptn->offset = entry->offset;
		ptn->size = entry->size;

		name += 16;
		entry++;
		ptn++;
	}

	msm_nand_data.nr_parts = count;
	msm_nand_data.parts = msm_nand_partitions;

	return 0;
}

__tagtable(ATAG_MSM_PARTITION, parse_tag_msm_partition);