1/* 2 * $Id: mbx860.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $ 3 * 4 * Handle mapping of the flash on MBX860 boards 5 * 6 * Author: Anton Todorov 7 * Copyright: (C) 2001 Emness Technology 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 */ 14 15#include <linux/module.h> 16#include <linux/types.h> 17#include <linux/kernel.h> 18#include <linux/init.h> 19#include <asm/io.h> 20#include <linux/mtd/mtd.h> 21#include <linux/mtd/map.h> 22#include <linux/mtd/partitions.h> 23 24 25#define WINDOW_ADDR 0xfe000000 26#define WINDOW_SIZE 0x00200000 27 28/* Flash / Partition sizing */ 29#define MAX_SIZE_KiB 8192 30#define BOOT_PARTITION_SIZE_KiB 512 31#define KERNEL_PARTITION_SIZE_KiB 5632 32#define APP_PARTITION_SIZE_KiB 2048 33 34#define NUM_PARTITIONS 3 35 36/* partition_info gives details on the logical partitions that the split the 37 * single flash device into. If the size if zero we use up to the end of the 38 * device. */ 39static struct mtd_partition partition_info[]={ 40 { .name = "MBX flash BOOT partition", 41 .offset = 0, 42 .size = BOOT_PARTITION_SIZE_KiB*1024 }, 43 { .name = "MBX flash DATA partition", 44 .offset = BOOT_PARTITION_SIZE_KiB*1024, 45 .size = (KERNEL_PARTITION_SIZE_KiB)*1024 }, 46 { .name = "MBX flash APPLICATION partition", 47 .offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 } 48}; 49 50 51static struct mtd_info *mymtd; 52 53struct map_info mbx_map = { 54 .name = "MBX flash", 55 .size = WINDOW_SIZE, 56 .phys = WINDOW_ADDR, 57 .bankwidth = 4, 58}; 59 60int __init init_mbx(void) 61{ 62 printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR); 63 mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4); 64 65 if (!mbx_map.virt) { 66 printk("Failed to ioremap\n"); 67 return -EIO; 68 } 69 simple_map_init(&mbx_map); 70 71 mymtd = do_map_probe("jedec_probe", &mbx_map); 72 if (mymtd) { 73 mymtd->owner = THIS_MODULE; 74 add_mtd_device(mymtd); 75 add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS); 76 return 0; 77 } 78 79 iounmap((void *)mbx_map.virt); 80 return -ENXIO; 81} 82 83static void __exit cleanup_mbx(void) 84{ 85 if (mymtd) { 86 del_mtd_device(mymtd); 87 map_destroy(mymtd); 88 } 89 if (mbx_map.virt) { 90 iounmap((void *)mbx_map.virt); 91 mbx_map.virt = 0; 92 } 93} 94 95module_init(init_mbx); 96module_exit(cleanup_mbx); 97 98MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>"); 99MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board"); 100MODULE_LICENSE("GPL"); 101