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- /*
- * 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");
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