1/* 2 * Handle mapping of the flash on MBX860 boards 3 * 4 * Author: Anton Todorov 5 * Copyright: (C) 2001 Emness Technology 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 * 11 */ 12 13#include <linux/module.h> 14#include <linux/types.h> 15#include <linux/kernel.h> 16#include <linux/init.h> 17#include <asm/io.h> 18#include <linux/mtd/mtd.h> 19#include <linux/mtd/map.h> 20#include <linux/mtd/partitions.h> 21 22 23#define WINDOW_ADDR 0xfe000000 24#define WINDOW_SIZE 0x00200000 25 26/* Flash / Partition sizing */ 27#define MAX_SIZE_KiB 8192 28#define BOOT_PARTITION_SIZE_KiB 512 29#define KERNEL_PARTITION_SIZE_KiB 5632 30#define APP_PARTITION_SIZE_KiB 2048 31 32#define NUM_PARTITIONS 3 33 34/* partition_info gives details on the logical partitions that the split the 35 * single flash device into. If the size if zero we use up to the end of the 36 * device. */ 37static struct mtd_partition partition_info[]={ 38 { .name = "MBX flash BOOT partition", 39 .offset = 0, 40 .size = BOOT_PARTITION_SIZE_KiB*1024 }, 41 { .name = "MBX flash DATA partition", 42 .offset = BOOT_PARTITION_SIZE_KiB*1024, 43 .size = (KERNEL_PARTITION_SIZE_KiB)*1024 }, 44 { .name = "MBX flash APPLICATION partition", 45 .offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 } 46}; 47 48 49static struct mtd_info *mymtd; 50 51struct map_info mbx_map = { 52 .name = "MBX flash", 53 .size = WINDOW_SIZE, 54 .phys = WINDOW_ADDR, 55 .bankwidth = 4, 56}; 57 58static int __init init_mbx(void) 59{ 60 printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR); 61 mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4); 62 63 if (!mbx_map.virt) { 64 printk("Failed to ioremap\n"); 65 return -EIO; 66 } 67 simple_map_init(&mbx_map); 68 69 mymtd = do_map_probe("jedec_probe", &mbx_map); 70 if (mymtd) { 71 mymtd->owner = THIS_MODULE; 72 add_mtd_device(mymtd); 73 add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS); 74 return 0; 75 } 76 77 iounmap((void *)mbx_map.virt); 78 return -ENXIO; 79} 80 81static void __exit cleanup_mbx(void) 82{ 83 if (mymtd) { 84 del_mtd_device(mymtd); 85 map_destroy(mymtd); 86 } 87 if (mbx_map.virt) { 88 iounmap((void *)mbx_map.virt); 89 mbx_map.virt = 0; 90 } 91} 92 93module_init(init_mbx); 94module_exit(cleanup_mbx); 95 96MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>"); 97MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board"); 98MODULE_LICENSE("GPL"); 99