1/* 2 * $Id: lubbock-flash.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $ 3 * 4 * Map driver for the Lubbock developer platform. 5 * 6 * Author: Nicolas Pitre 7 * Copyright: (C) 2001 MontaVista Software Inc. 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#include <linux/module.h> 15#include <linux/types.h> 16#include <linux/kernel.h> 17#include <linux/init.h> 18#include <linux/slab.h> 19 20#include <linux/dma-mapping.h> 21#include <linux/mtd/mtd.h> 22#include <linux/mtd/map.h> 23#include <linux/mtd/partitions.h> 24 25#include <asm/io.h> 26#include <asm/hardware.h> 27#include <asm/arch/pxa-regs.h> 28#include <asm/arch/lubbock.h> 29 30 31#define ROM_ADDR 0x00000000 32#define FLASH_ADDR 0x04000000 33 34#define WINDOW_SIZE 64*1024*1024 35 36static void lubbock_map_inval_cache(struct map_info *map, unsigned long from, ssize_t len) 37{ 38 consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE); 39} 40 41static struct map_info lubbock_maps[2] = { { 42 .size = WINDOW_SIZE, 43 .phys = 0x00000000, 44 .inval_cache = lubbock_map_inval_cache, 45}, { 46 .size = WINDOW_SIZE, 47 .phys = 0x04000000, 48 .inval_cache = lubbock_map_inval_cache, 49} }; 50 51static struct mtd_partition lubbock_partitions[] = { 52 { 53 .name = "Bootloader", 54 .size = 0x00040000, 55 .offset = 0, 56 .mask_flags = MTD_WRITEABLE /* force read-only */ 57 },{ 58 .name = "Kernel", 59 .size = 0x00100000, 60 .offset = 0x00040000, 61 },{ 62 .name = "Filesystem", 63 .size = MTDPART_SIZ_FULL, 64 .offset = 0x00140000 65 } 66}; 67 68static struct mtd_info *mymtds[2]; 69static struct mtd_partition *parsed_parts[2]; 70static int nr_parsed_parts[2]; 71 72static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; 73 74static int __init init_lubbock(void) 75{ 76 int flashboot = (LUB_CONF_SWITCHES & 1); 77 int ret = 0, i; 78 79 lubbock_maps[0].bankwidth = lubbock_maps[1].bankwidth = 80 (BOOT_DEF & 1) ? 2 : 4; 81 82 /* Compensate for the nROMBT switch which swaps the flash banks */ 83 printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n", 84 flashboot?"Flash":"ROM", flashboot); 85 86 lubbock_maps[flashboot^1].name = "Lubbock Application Flash"; 87 lubbock_maps[flashboot].name = "Lubbock Boot ROM"; 88 89 for (i = 0; i < 2; i++) { 90 lubbock_maps[i].virt = ioremap(lubbock_maps[i].phys, WINDOW_SIZE); 91 if (!lubbock_maps[i].virt) { 92 printk(KERN_WARNING "Failed to ioremap %s\n", lubbock_maps[i].name); 93 if (!ret) 94 ret = -ENOMEM; 95 continue; 96 } 97 lubbock_maps[i].cached = ioremap_cached(lubbock_maps[i].phys, WINDOW_SIZE); 98 if (!lubbock_maps[i].cached) 99 printk(KERN_WARNING "Failed to ioremap cached %s\n", lubbock_maps[i].name); 100 simple_map_init(&lubbock_maps[i]); 101 102 printk(KERN_NOTICE "Probing %s at physical address 0x%08lx (%d-bit bankwidth)\n", 103 lubbock_maps[i].name, lubbock_maps[i].phys, 104 lubbock_maps[i].bankwidth * 8); 105 106 mymtds[i] = do_map_probe("cfi_probe", &lubbock_maps[i]); 107 108 if (!mymtds[i]) { 109 iounmap((void *)lubbock_maps[i].virt); 110 if (lubbock_maps[i].cached) 111 iounmap(lubbock_maps[i].cached); 112 if (!ret) 113 ret = -EIO; 114 continue; 115 } 116 mymtds[i]->owner = THIS_MODULE; 117 118 ret = parse_mtd_partitions(mymtds[i], probes, 119 &parsed_parts[i], 0); 120 121 if (ret > 0) 122 nr_parsed_parts[i] = ret; 123 } 124 125 if (!mymtds[0] && !mymtds[1]) 126 return ret; 127 128 for (i = 0; i < 2; i++) { 129 if (!mymtds[i]) { 130 printk(KERN_WARNING "%s is absent. Skipping\n", lubbock_maps[i].name); 131 } else if (nr_parsed_parts[i]) { 132 add_mtd_partitions(mymtds[i], parsed_parts[i], nr_parsed_parts[i]); 133 } else if (!i) { 134 printk("Using static partitions on %s\n", lubbock_maps[i].name); 135 add_mtd_partitions(mymtds[i], lubbock_partitions, ARRAY_SIZE(lubbock_partitions)); 136 } else { 137 printk("Registering %s as whole device\n", lubbock_maps[i].name); 138 add_mtd_device(mymtds[i]); 139 } 140 } 141 return 0; 142} 143 144static void __exit cleanup_lubbock(void) 145{ 146 int i; 147 for (i = 0; i < 2; i++) { 148 if (!mymtds[i]) 149 continue; 150 151 if (nr_parsed_parts[i] || !i) 152 del_mtd_partitions(mymtds[i]); 153 else 154 del_mtd_device(mymtds[i]); 155 156 map_destroy(mymtds[i]); 157 iounmap((void *)lubbock_maps[i].virt); 158 if (lubbock_maps[i].cached) 159 iounmap(lubbock_maps[i].cached); 160 161 kfree(parsed_parts[i]); 162 } 163} 164 165module_init(init_lubbock); 166module_exit(cleanup_lubbock); 167 168MODULE_LICENSE("GPL"); 169MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); 170MODULE_DESCRIPTION("MTD map driver for Intel Lubbock"); 171