[deliverable/linux.git] / drivers / mtd / maps / edb7312.c

/*
 * Handle mapping of the NOR flash on Cogent EDB7312 boards
 *
 * Copyright 2002 SYSGO Real-Time Solutions GmbH
 *
 * 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/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>

#define WINDOW_ADDR 0x00000000      /* physical properties of flash */
#define WINDOW_SIZE 0x01000000
#define BUSWIDTH    2
#define FLASH_BLOCKSIZE_MAIN	0x20000
#define FLASH_NUMBLOCKS_MAIN	128
/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
#define PROBETYPES { "cfi_probe", NULL }

#define MSG_PREFIX "EDB7312-NOR:"   /* prefix for our printk()'s */
#define MTDID      "edb7312-nor"    /* for mtdparts= partitioning */

static struct mtd_info *mymtd;

struct map_info edb7312nor_map = {
	.name = "NOR flash on EDB7312",
	.size = WINDOW_SIZE,
	.bankwidth = BUSWIDTH,
	.phys = WINDOW_ADDR,
};

/*
 * MTD partitioning stuff
 */
static struct mtd_partition static_partitions[3] =
{
	{
		.name = "ARMboot",
		.size = 0x40000,
		.offset = 0
	},
	{
		.name = "Kernel",
		.size = 0x200000,
		.offset = 0x40000
	},
	{
		.name = "RootFS",
		.size = 0xDC0000,
		.offset = 0x240000
	},
};

static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };

static int                   mtd_parts_nb = 0;
static struct mtd_partition *mtd_parts    = 0;

static int __init init_edb7312nor(void)
{
	static const char *rom_probe_types[] = PROBETYPES;
	const char **type;
	const char *part_type = 0;

       	printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n",
	       WINDOW_SIZE, WINDOW_ADDR);
	edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);

	if (!edb7312nor_map.virt) {
		printk(MSG_PREFIX "failed to ioremap\n");
		return -EIO;
	}

	simple_map_init(&edb7312nor_map);

	mymtd = 0;
	type = rom_probe_types;
	for(; !mymtd && *type; type++) {
		mymtd = do_map_probe(*type, &edb7312nor_map);
	}
	if (mymtd) {
		mymtd->owner = THIS_MODULE;

		mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID);
		if (mtd_parts_nb > 0)
			part_type = "detected";

		if (mtd_parts_nb == 0) {
			mtd_parts = static_partitions;
			mtd_parts_nb = ARRAY_SIZE(static_partitions);
			part_type = "static";
		}

		if (mtd_parts_nb == 0)
			printk(KERN_NOTICE MSG_PREFIX "no partition info available\n");
		else
			printk(KERN_NOTICE MSG_PREFIX
			       "using %s partition definition\n", part_type);
		/* Register the whole device first. */
		mtd_device_register(mymtd, NULL, 0);
		mtd_device_register(mymtd, mtd_parts, mtd_parts_nb);
		return 0;
	}

	iounmap((void *)edb7312nor_map.virt);
	return -ENXIO;
}

static void __exit cleanup_edb7312nor(void)
{
	if (mymtd) {
		mtd_device_unregister(mymtd);
		map_destroy(mymtd);
	}
	if (edb7312nor_map.virt) {
		iounmap((void *)edb7312nor_map.virt);
		edb7312nor_map.virt = 0;
	}
}

module_init(init_edb7312nor);
module_exit(cleanup_edb7312nor);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Handle mapping of the NOR flash on Cogent EDB7312 boards
	3	*
	4	* Copyright 2002 SYSGO Real-Time Solutions GmbH
69f34c98	5	*
1da177e4 LT	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/types.h>
	13	#include <linux/kernel.h>
	14	#include <linux/init.h>
	15	#include <asm/io.h>
	16	#include <linux/mtd/mtd.h>
	17	#include <linux/mtd/map.h>
1da177e4	18	#include <linux/mtd/partitions.h>
1da177e4 LT	19
	20	#define WINDOW_ADDR 0x00000000 /* physical properties of flash */
	21	#define WINDOW_SIZE 0x01000000
	22	#define BUSWIDTH 2
	23	#define FLASH_BLOCKSIZE_MAIN 0x20000
	24	#define FLASH_NUMBLOCKS_MAIN 128
	25	/* can be "cfi_probe", "jedec_probe", "map_rom", NULL }; */
	26	#define PROBETYPES { "cfi_probe", NULL }
	27
	28	#define MSG_PREFIX "EDB7312-NOR:" /* prefix for our printk()'s */
	29	#define MTDID "edb7312-nor" /* for mtdparts= partitioning */
	30
	31	static struct mtd_info *mymtd;
	32
	33	struct map_info edb7312nor_map = {
	34	.name = "NOR flash on EDB7312",
	35	.size = WINDOW_SIZE,
	36	.bankwidth = BUSWIDTH,
	37	.phys = WINDOW_ADDR,
	38	};
	39
1da177e4	40	/*
69f34c98	41	* MTD partitioning stuff
1da177e4 LT	42	*/
	43	static struct mtd_partition static_partitions[3] =
	44	{
	45	{
	46	.name = "ARMboot",
	47	.size = 0x40000,
	48	.offset = 0
	49	},
	50	{
	51	.name = "Kernel",
	52	.size = 0x200000,
	53	.offset = 0x40000
	54	},
	55	{
	56	.name = "RootFS",
	57	.size = 0xDC0000,
	58	.offset = 0x240000
	59	},
	60	};
	61
	62	static const char *probes[] = { "RedBoot", "cmdlinepart", NULL };
	63
1da177e4 LT	64	static int mtd_parts_nb = 0;
	65	static struct mtd_partition *mtd_parts = 0;
	66
d8156adb	67	static int __init init_edb7312nor(void)
1da177e4 LT	68	{
	69	static const char *rom_probe_types[] = PROBETYPES;
	70	const char **type;
	71	const char *part_type = 0;
	72
69f34c98	73	printk(KERN_NOTICE MSG_PREFIX "0x%08x at 0x%08x\n",
1da177e4 LT	74	WINDOW_SIZE, WINDOW_ADDR);
	75	edb7312nor_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
	76
	77	if (!edb7312nor_map.virt) {
	78	printk(MSG_PREFIX "failed to ioremap\n");
	79	return -EIO;
	80	}
69f34c98	81
1da177e4 LT	82	simple_map_init(&edb7312nor_map);
	83
	84	mymtd = 0;
	85	type = rom_probe_types;
	86	for(; !mymtd && *type; type++) {
	87	mymtd = do_map_probe(*type, &edb7312nor_map);
	88	}
	89	if (mymtd) {
	90	mymtd->owner = THIS_MODULE;
	91
1da177e4 LT	92	mtd_parts_nb = parse_mtd_partitions(mymtd, probes, &mtd_parts, MTDID);
1da177e4 LT	93	if (mtd_parts_nb > 0)
5af3aa24	94	part_type = "detected";
1da177e4	95
5af3aa24	96	if (mtd_parts_nb == 0) {
1da177e4 LT	97	mtd_parts = static_partitions;
	98	mtd_parts_nb = ARRAY_SIZE(static_partitions);
	99	part_type = "static";
	100	}
5af3aa24	101
1da177e4	102	if (mtd_parts_nb == 0)
5af3aa24	103	printk(KERN_NOTICE MSG_PREFIX "no partition info available\n");
1da177e4	104	else
1da177e4 LT	105	printk(KERN_NOTICE MSG_PREFIX
1da177e4 LT	106	"using %s partition definition\n", part_type);
5af3aa24 JI	107	/* Register the whole device first. */
	108	mtd_device_register(mymtd, NULL, 0);
	109	mtd_device_register(mymtd, mtd_parts, mtd_parts_nb);
1da177e4 LT	110	return 0;
	111	}
	112
	113	iounmap((void *)edb7312nor_map.virt);
	114	return -ENXIO;
	115	}
	116
	117	static void __exit cleanup_edb7312nor(void)
	118	{
	119	if (mymtd) {
5af3aa24	120	mtd_device_unregister(mymtd);
1da177e4 LT	121	map_destroy(mymtd);
	122	}
	123	if (edb7312nor_map.virt) {
	124	iounmap((void *)edb7312nor_map.virt);
	125	edb7312nor_map.virt = 0;
	126	}
	127	}
	128
	129	module_init(init_edb7312nor);
	130	module_exit(cleanup_edb7312nor);
	131
	132	MODULE_LICENSE("GPL");
	133	MODULE_AUTHOR("Marius Groeger <mag@sysgo.de>");
	134	MODULE_DESCRIPTION("Generic configurable MTD map driver");