1/* 2 * Mapping for Ocotea user flash 3 * 4 * Matt Porter <mporter@kernel.crashing.org> 5 * 6 * Copyright 2002-2004 MontaVista Software Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 */ 13 14#include <linux/module.h> 15#include <linux/types.h> 16#include <linux/kernel.h> 17#include <linux/init.h> 18#include <linux/mtd/mtd.h> 19#include <linux/mtd/map.h> 20#include <linux/mtd/partitions.h> 21#include <asm/io.h> 22#include <asm/ibm44x.h> 23#include <platforms/4xx/ocotea.h> 24 25static struct mtd_info *flash; 26 27static struct map_info ocotea_small_map = { 28 .name = "Ocotea small flash", 29 .size = OCOTEA_SMALL_FLASH_SIZE, 30 .buswidth = 1, 31}; 32 33static struct map_info ocotea_large_map = { 34 .name = "Ocotea large flash", 35 .size = OCOTEA_LARGE_FLASH_SIZE, 36 .buswidth = 1, 37}; 38 39static struct mtd_partition ocotea_small_partitions[] = { 40 { 41 .name = "pibs", 42 .offset = 0x0, 43 .size = 0x100000, 44 } 45}; 46 47static struct mtd_partition ocotea_large_partitions[] = { 48 { 49 .name = "fs", 50 .offset = 0, 51 .size = 0x300000, 52 }, 53 { 54 .name = "firmware", 55 .offset = 0x300000, 56 .size = 0x100000, 57 } 58}; 59 60int __init init_ocotea(void) 61{ 62 u8 fpga0_reg; 63 u8 *fpga0_adr; 64 unsigned long long small_flash_base, large_flash_base; 65 66 fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16); 67 if (!fpga0_adr) 68 return -ENOMEM; 69 70 fpga0_reg = readb((unsigned long)fpga0_adr); 71 iounmap(fpga0_adr); 72 73 if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) { 74 small_flash_base = OCOTEA_SMALL_FLASH_HIGH; 75 large_flash_base = OCOTEA_LARGE_FLASH_LOW; 76 } 77 else { 78 small_flash_base = OCOTEA_SMALL_FLASH_LOW; 79 large_flash_base = OCOTEA_LARGE_FLASH_HIGH; 80 } 81 82 ocotea_small_map.phys = small_flash_base; 83 ocotea_small_map.virt = ioremap64(small_flash_base, 84 ocotea_small_map.size); 85 86 if (!ocotea_small_map.virt) { 87 printk("Failed to ioremap flash\n"); 88 return -EIO; 89 } 90 91 simple_map_init(&ocotea_small_map); 92 93 flash = do_map_probe("map_rom", &ocotea_small_map); 94 if (flash) { 95 flash->owner = THIS_MODULE; 96 add_mtd_partitions(flash, ocotea_small_partitions, 97 ARRAY_SIZE(ocotea_small_partitions)); 98 } else { 99 printk("map probe failed for flash\n"); 100 iounmap(ocotea_small_map.virt); 101 return -ENXIO; 102 } 103 104 ocotea_large_map.phys = large_flash_base; 105 ocotea_large_map.virt = ioremap64(large_flash_base, 106 ocotea_large_map.size); 107 108 if (!ocotea_large_map.virt) { 109 printk("Failed to ioremap flash\n"); 110 iounmap(ocotea_small_map.virt); 111 return -EIO; 112 } 113 114 simple_map_init(&ocotea_large_map); 115 116 flash = do_map_probe("cfi_probe", &ocotea_large_map); 117 if (flash) { 118 flash->owner = THIS_MODULE; 119 add_mtd_partitions(flash, ocotea_large_partitions, 120 ARRAY_SIZE(ocotea_large_partitions)); 121 } else { 122 printk("map probe failed for flash\n"); 123 iounmap(ocotea_small_map.virt); 124 iounmap(ocotea_large_map.virt); 125 return -ENXIO; 126 } 127 128 return 0; 129} 130 131static void __exit cleanup_ocotea(void) 132{ 133 if (flash) { 134 del_mtd_partitions(flash); 135 map_destroy(flash); 136 } 137 138 if (ocotea_small_map.virt) { 139 iounmap((void *)ocotea_small_map.virt); 140 ocotea_small_map.virt = 0; 141 } 142 143 if (ocotea_large_map.virt) { 144 iounmap((void *)ocotea_large_map.virt); 145 ocotea_large_map.virt = 0; 146 } 147} 148 149module_init(init_ocotea); 150module_exit(cleanup_ocotea); 151 152MODULE_LICENSE("GPL"); 153MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); 154MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards"); 155