[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

/* can be { "cfi_probe", "jedec_probe", "map_rom", NULL } */
#define PROBETYPES { "jedec_probe", NULL }

#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 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 static_partitions[] =
{
	{
		.name = "FileSystem",
		.size = 0x800000,
		.offset = 0x00000000
	},
};

static int mtd_parts_nb[NUM_FLASHBANKS];
static struct mtd_partition *mtd_parts[NUM_FLASHBANKS];


static int __init init_impa7(void)
{
	static const char *rom_probe_types[] = PROBETYPES;
	const char **type;
	const char *part_type = 0;
	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] = 0;
		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_parts_nb[i] = parse_mtd_partitions(impa7_mtd[i],
							       NULL,
							       &mtd_parts[i],
							       0);
			if (mtd_parts_nb[i] > 0) {
				part_type = "command line";
			} else {
				mtd_parts[i] = static_partitions;
				mtd_parts_nb[i] = ARRAY_SIZE(static_partitions);
				part_type = "static";
			}

			printk(KERN_NOTICE MSG_PREFIX
			       "using %s partition definition\n",
			       part_type);
			mtd_device_register(impa7_mtd[i],
					    mtd_parts[i], mtd_parts_nb[i]);
		}
		else
			iounmap((void *)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 *)impa7_map[i].virt);
			impa7_map[i].virt = 0;
		}
	}
}

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
	27	/* can be { "cfi_probe", "jedec_probe", "map_rom", NULL } */
	28	#define PROBETYPES { "jedec_probe", NULL }
	29
	30	#define MSG_PREFIX "impA7:" /* prefix for our printk()'s */
	31	#define MTDID "impa7-%d" /* for mtdparts= partitioning */
	32
	33	static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
	34
	35
	36	static struct map_info impa7_map[NUM_FLASHBANKS] = {
	37	{
	38	.name = "impA7 NOR Flash Bank #0",
	39	.size = WINDOW_SIZE0,
	40	.bankwidth = BUSWIDTH,
	41	},
	42	{
	43	.name = "impA7 NOR Flash Bank #1",
	44	.size = WINDOW_SIZE1,
	45	.bankwidth = BUSWIDTH,
	46	},
	47	};
	48
1da177e4	49	/*
69f34c98	50	* MTD partitioning stuff
1da177e4 LT	51	*/
	52	static struct mtd_partition static_partitions[] =
	53	{
	54	{
	55	.name = "FileSystem",
	56	.size = 0x800000,
	57	.offset = 0x00000000
	58	},
	59	};
	60
	61	static int mtd_parts_nb[NUM_FLASHBANKS];
	62	static struct mtd_partition *mtd_parts[NUM_FLASHBANKS];
	63
1da177e4	64
4f8f3af2	65	static int __init init_impa7(void)
1da177e4 LT	66	{
	67	static const char *rom_probe_types[] = PROBETYPES;
	68	const char **type;
	69	const char *part_type = 0;
	70	int i;
	71	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
	72	{ WINDOW_ADDR0, WINDOW_SIZE0 },
	73	{ WINDOW_ADDR1, WINDOW_SIZE1 },
	74	};
	75	int devicesfound = 0;
	76
	77	for(i=0; i<NUM_FLASHBANKS; i++)
	78	{
	79	printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
	80	pt[i].size, pt[i].addr);
	81
	82	impa7_map[i].phys = pt[i].addr;
	83	impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
	84	if (!impa7_map[i].virt) {
	85	printk(MSG_PREFIX "failed to ioremap\n");
	86	return -EIO;
	87	}
	88	simple_map_init(&impa7_map[i]);
	89
	90	impa7_mtd[i] = 0;
	91	type = rom_probe_types;
	92	for(; !impa7_mtd[i] && *type; type++) {
	93	impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
	94	}
	95
	96	if (impa7_mtd[i]) {
	97	impa7_mtd[i]->owner = THIS_MODULE;
	98	devicesfound++;
69f34c98	99	mtd_parts_nb[i] = parse_mtd_partitions(impa7_mtd[i],
cec25c72	100	NULL,
69f34c98	101	&mtd_parts[i],
1da177e4 LT	102	0);
	103	if (mtd_parts_nb[i] > 0) {
	104	part_type = "command line";
	105	} else {
	106	mtd_parts[i] = static_partitions;
	107	mtd_parts_nb[i] = ARRAY_SIZE(static_partitions);
	108	part_type = "static";
	109	}
	110
	111	printk(KERN_NOTICE MSG_PREFIX
69f34c98	112	"using %s partition definition\n",
1da177e4	113	part_type);
96b639fd JI	114	mtd_device_register(impa7_mtd[i],
96b639fd JI	115	mtd_parts[i], mtd_parts_nb[i]);
1da177e4	116	}
69f34c98	117	else
1da177e4 LT	118	iounmap((void *)impa7_map[i].virt);
	119	}
	120	return devicesfound == 0 ? -ENXIO : 0;
	121	}
	122
	123	static void __exit cleanup_impa7(void)
	124	{
	125	int i;
	126	for (i=0; i<NUM_FLASHBANKS; i++) {
	127	if (impa7_mtd[i]) {
96b639fd	128	mtd_device_unregister(impa7_mtd[i]);
1da177e4 LT	129	map_destroy(impa7_mtd[i]);
	130	iounmap((void *)impa7_map[i].virt);
	131	impa7_map[i].virt = 0;
	132	}
	133	}
	134	}
	135
	136	module_init(init_impa7);
	137	module_exit(cleanup_impa7);
	138
	139	MODULE_LICENSE("GPL");
	140	MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
	141	MODULE_DESCRIPTION("MTD map driver for implementa impA7");