1/* 2 * sharpsl-flash.c 3 * 4 * Copyright (C) 2001 Lineo Japan, Inc. 5 * Copyright (C) 2002 SHARP 6 * 7 * $Id: sharpsl-flash.c,v 1.1.1.1 2007/08/03 18:52:44 Exp $ 8 * 9 * based on rpxlite.c,v 1.15 2001/10/02 15:05:14 dwmw2 Exp 10 * Handle mapping of the flash on the RPX Lite and CLLF boards 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 */ 23 24#include <linux/module.h> 25#include <linux/types.h> 26#include <linux/kernel.h> 27#include <linux/mtd/mtd.h> 28#include <linux/mtd/map.h> 29#include <linux/mtd/partitions.h> 30#include <asm/io.h> 31#include <asm/mach-types.h> 32 33#define WINDOW_ADDR 0x00000000 34#define WINDOW_SIZE 0x00800000 35#define BANK_WIDTH 2 36 37static struct mtd_info *mymtd; 38 39struct map_info sharpsl_map = { 40 .name = "sharpsl-flash", 41 .size = WINDOW_SIZE, 42 .bankwidth = BANK_WIDTH, 43 .phys = WINDOW_ADDR 44}; 45 46static struct mtd_partition sharpsl_partitions[1] = { 47 { 48 name: "Boot PROM Filesystem", 49 } 50}; 51 52int __init init_sharpsl(void) 53{ 54 struct mtd_partition *parts; 55 int nb_parts = 0; 56 char *part_type = "static"; 57 58 printk(KERN_NOTICE "Sharp SL series flash device: %x at %x\n", 59 WINDOW_SIZE, WINDOW_ADDR); 60 sharpsl_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); 61 if (!sharpsl_map.virt) { 62 printk("Failed to ioremap\n"); 63 return -EIO; 64 } 65 66 simple_map_init(&sharpsl_map); 67 68 mymtd = do_map_probe("map_rom", &sharpsl_map); 69 if (!mymtd) { 70 iounmap(sharpsl_map.virt); 71 return -ENXIO; 72 } 73 74 mymtd->owner = THIS_MODULE; 75 76 if (machine_is_corgi() || machine_is_shepherd() || machine_is_husky() 77 || machine_is_poodle()) { 78 sharpsl_partitions[0].size=0x006d0000; 79 sharpsl_partitions[0].offset=0x00120000; 80 } else if (machine_is_tosa()) { 81 sharpsl_partitions[0].size=0x006a0000; 82 sharpsl_partitions[0].offset=0x00160000; 83 } else if (machine_is_spitz() || machine_is_akita() || machine_is_borzoi()) { 84 sharpsl_partitions[0].size=0x006b0000; 85 sharpsl_partitions[0].offset=0x00140000; 86 } else { 87 map_destroy(mymtd); 88 iounmap(sharpsl_map.virt); 89 return -ENODEV; 90 } 91 92 parts = sharpsl_partitions; 93 nb_parts = ARRAY_SIZE(sharpsl_partitions); 94 95 printk(KERN_NOTICE "Using %s partision definition\n", part_type); 96 add_mtd_partitions(mymtd, parts, nb_parts); 97 98 return 0; 99} 100 101static void __exit cleanup_sharpsl(void) 102{ 103 if (mymtd) { 104 del_mtd_partitions(mymtd); 105 map_destroy(mymtd); 106 } 107 if (sharpsl_map.virt) { 108 iounmap(sharpsl_map.virt); 109 sharpsl_map.virt = 0; 110 } 111} 112 113module_init(init_sharpsl); 114module_exit(cleanup_sharpsl); 115 116MODULE_LICENSE("GPL"); 117MODULE_AUTHOR("SHARP (Original: Arnold Christensen <AKC@pel.dk>)"); 118MODULE_DESCRIPTION("MTD map driver for SHARP SL series"); 119