[mirror_ubuntu-eoan-kernel.git] / drivers / mtd / maps / impa7.c

/*
 * Handle mapping of the NOR flash on implementa A7 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_ADDR0 0x00000000      /* physical properties of flash */
#define WINDOW_SIZE0 0x00800000
#define WINDOW_ADDR1 0x10000000      /* physical properties of flash */
#define WINDOW_SIZE1 0x00800000
#define NUM_FLASHBANKS 2
#define BUSWIDTH     4

#define MSG_PREFIX "impA7:"   /* prefix for our printk()'s */
#define MTDID      "impa7-%d"  /* for mtdparts= partitioning */

static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];

static const char * const rom_probe_types[] = { "jedec_probe", NULL };

static struct map_info impa7_map[NUM_FLASHBANKS] = {
	{
		.name = "impA7 NOR Flash Bank #0",
		.size = WINDOW_SIZE0,
		.bankwidth = BUSWIDTH,
	},
	{
		.name = "impA7 NOR Flash Bank #1",
		.size = WINDOW_SIZE1,
		.bankwidth = BUSWIDTH,
	},
};

/*
 * MTD partitioning stuff
 */
static struct mtd_partition partitions[] =
{
	{
		.name = "FileSystem",
		.size = 0x800000,
		.offset = 0x00000000
	},
};

static int __init init_impa7(void)
{
	const char * const *type;
	int i;
	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
	  { WINDOW_ADDR0, WINDOW_SIZE0 },
	  { WINDOW_ADDR1, WINDOW_SIZE1 },
        };
	int devicesfound = 0;

	for(i=0; i<NUM_FLASHBANKS; i++)
	{
		printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
		       pt[i].size, pt[i].addr);

		impa7_map[i].phys = pt[i].addr;
		impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
		if (!impa7_map[i].virt) {
			printk(MSG_PREFIX "failed to ioremap\n");
			return -EIO;
		}
		simple_map_init(&impa7_map[i]);

		impa7_mtd[i] = NULL;
		type = rom_probe_types;
		for(; !impa7_mtd[i] && *type; type++) {
			impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
		}

		if (impa7_mtd[i]) {
			impa7_mtd[i]->owner = THIS_MODULE;
			devicesfound++;
			mtd_device_parse_register(impa7_mtd[i], NULL, NULL,
						  partitions,
						  ARRAY_SIZE(partitions));
		} else {
			iounmap((void __iomem *)impa7_map[i].virt);
		}
	}
	return devicesfound == 0 ? -ENXIO : 0;
}

static void __exit cleanup_impa7(void)
{
	int i;
	for (i=0; i<NUM_FLASHBANKS; i++) {
		if (impa7_mtd[i]) {
			mtd_device_unregister(impa7_mtd[i]);
			map_destroy(impa7_mtd[i]);
			iounmap((void __iomem *)impa7_map[i].virt);
			impa7_map[i].virt = NULL;
		}
	}
}

module_init(init_impa7);
module_exit(cleanup_impa7);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
MODULE_DESCRIPTION("MTD map driver for implementa impA7");
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2	* Handle mapping of the NOR flash on implementa A7 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_ADDR0 0x00000000 /* physical properties of flash */
	21	#define WINDOW_SIZE0 0x00800000
	22	#define WINDOW_ADDR1 0x10000000 /* physical properties of flash */
	23	#define WINDOW_SIZE1 0x00800000
	24	#define NUM_FLASHBANKS 2
	25	#define BUSWIDTH 4
	26
1da177e4 LT	27	#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
	28	#define MTDID "impa7-%d" /* for mtdparts= partitioning */
	29
	30	static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
	31
0984c891	32	static const char * const rom_probe_types[] = { "jedec_probe", NULL };
1da177e4 LT	33
	34	static struct map_info impa7_map[NUM_FLASHBANKS] = {
	35	{
	36	.name = "impA7 NOR Flash Bank #0",
	37	.size = WINDOW_SIZE0,
	38	.bankwidth = BUSWIDTH,
	39	},
	40	{
	41	.name = "impA7 NOR Flash Bank #1",
	42	.size = WINDOW_SIZE1,
	43	.bankwidth = BUSWIDTH,
	44	},
	45	};
	46
1da177e4	47	/*
69f34c98	48	* MTD partitioning stuff
1da177e4	49	*/
5003403b	50	static struct mtd_partition partitions[] =
1da177e4 LT	51	{
	52	{
	53	.name = "FileSystem",
	54	.size = 0x800000,
	55	.offset = 0x00000000
	56	},
	57	};
	58
4f8f3af2	59	static int __init init_impa7(void)
1da177e4	60	{
0984c891	61	const char * const *type;
1da177e4 LT	62	int i;
	63	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
	64	{ WINDOW_ADDR0, WINDOW_SIZE0 },
	65	{ WINDOW_ADDR1, WINDOW_SIZE1 },
	66	};
	67	int devicesfound = 0;
	68
	69	for(i=0; i<NUM_FLASHBANKS; i++)
	70	{
	71	printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
	72	pt[i].size, pt[i].addr);
	73
	74	impa7_map[i].phys = pt[i].addr;
	75	impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
	76	if (!impa7_map[i].virt) {
	77	printk(MSG_PREFIX "failed to ioremap\n");
	78	return -EIO;
	79	}
	80	simple_map_init(&impa7_map[i]);
	81
d1d90c99	82	impa7_mtd[i] = NULL;
1da177e4 LT	83	type = rom_probe_types;
	84	for(; !impa7_mtd[i] && *type; type++) {
	85	impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
	86	}
	87
	88	if (impa7_mtd[i]) {
	89	impa7_mtd[i]->owner = THIS_MODULE;
	90	devicesfound++;
42d7fbe2	91	mtd_device_parse_register(impa7_mtd[i], NULL, NULL,
5003403b DES	92	partitions,
5003403b DES	93	ARRAY_SIZE(partitions));
d1d90c99 JH	94	} else {
d1d90c99 JH	95	iounmap((void __iomem *)impa7_map[i].virt);
1da177e4	96	}
1da177e4 LT	97	}
	98	return devicesfound == 0 ? -ENXIO : 0;
	99	}
	100
	101	static void __exit cleanup_impa7(void)
	102	{
	103	int i;
	104	for (i=0; i<NUM_FLASHBANKS; i++) {
	105	if (impa7_mtd[i]) {
96b639fd	106	mtd_device_unregister(impa7_mtd[i]);
1da177e4	107	map_destroy(impa7_mtd[i]);
d1d90c99 JH	108	iounmap((void __iomem *)impa7_map[i].virt);
d1d90c99 JH	109	impa7_map[i].virt = NULL;
1da177e4 LT	110	}
	111	}
	112	}
	113
	114	module_init(init_impa7);
	115	module_exit(cleanup_impa7);
	116
	117	MODULE_LICENSE("GPL");
	118	MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
	119	MODULE_DESCRIPTION("MTD map driver for implementa impA7");