Nico Pitre | cbec19a | 2005-07-01 23:55:24 +0100 | [diff] [blame] | 1 | /* |
| 2 | * $Id: $ |
| 3 | * |
| 4 | * Map driver for the Mainstone 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/dma-mapping.h> |
| 19 | #include <linux/mtd/mtd.h> |
| 20 | #include <linux/mtd/map.h> |
| 21 | #include <linux/mtd/partitions.h> |
| 22 | #include <asm/io.h> |
| 23 | #include <asm/hardware.h> |
| 24 | #include <asm/arch/pxa-regs.h> |
| 25 | #include <asm/arch/mainstone.h> |
| 26 | |
| 27 | |
| 28 | #define ROM_ADDR 0x00000000 |
| 29 | #define FLASH_ADDR 0x04000000 |
| 30 | |
| 31 | #define WINDOW_SIZE 0x04000000 |
| 32 | |
| 33 | static void mainstone_map_inval_cache(struct map_info *map, unsigned long from, |
| 34 | ssize_t len) |
| 35 | { |
| 36 | consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE); |
| 37 | } |
| 38 | |
| 39 | static struct map_info mainstone_maps[2] = { { |
| 40 | .size = WINDOW_SIZE, |
| 41 | .phys = PXA_CS0_PHYS, |
| 42 | .inval_cache = mainstone_map_inval_cache, |
| 43 | }, { |
| 44 | .size = WINDOW_SIZE, |
| 45 | .phys = PXA_CS1_PHYS, |
| 46 | .inval_cache = mainstone_map_inval_cache, |
| 47 | } }; |
| 48 | |
| 49 | static struct mtd_partition mainstone_partitions[] = { |
| 50 | { |
| 51 | .name = "Bootloader", |
| 52 | .size = 0x00040000, |
| 53 | .offset = 0, |
| 54 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 55 | },{ |
| 56 | .name = "Kernel", |
| 57 | .size = 0x00400000, |
| 58 | .offset = 0x00040000, |
| 59 | },{ |
| 60 | .name = "Filesystem", |
| 61 | .size = MTDPART_SIZ_FULL, |
| 62 | .offset = 0x00440000 |
| 63 | } |
| 64 | }; |
| 65 | |
| 66 | static struct mtd_info *mymtds[2]; |
| 67 | static struct mtd_partition *parsed_parts[2]; |
| 68 | static int nr_parsed_parts[2]; |
| 69 | |
| 70 | static const char *probes[] = { "RedBoot", "cmdlinepart", NULL }; |
| 71 | |
| 72 | static int __init init_mainstone(void) |
| 73 | { |
| 74 | int SW7 = 0; /* FIXME: get from SCR (Mst doc section 3.2.1.1) */ |
| 75 | int ret = 0, i; |
| 76 | |
| 77 | mainstone_maps[0].bankwidth = (BOOT_DEF & 1) ? 2 : 4; |
| 78 | mainstone_maps[1].bankwidth = 4; |
| 79 | |
| 80 | /* Compensate for SW7 which swaps the flash banks */ |
| 81 | mainstone_maps[SW7].name = "processor flash"; |
| 82 | mainstone_maps[SW7 ^ 1].name = "main board flash"; |
| 83 | |
| 84 | printk(KERN_NOTICE "Mainstone configured to boot from %s\n", |
| 85 | mainstone_maps[0].name); |
| 86 | |
| 87 | for (i = 0; i < 2; i++) { |
| 88 | mainstone_maps[i].virt = ioremap(mainstone_maps[i].phys, |
| 89 | WINDOW_SIZE); |
| 90 | if (!mainstone_maps[i].virt) { |
| 91 | printk(KERN_WARNING "Failed to ioremap %s\n", |
| 92 | mainstone_maps[i].name); |
| 93 | if (!ret) |
| 94 | ret = -ENOMEM; |
| 95 | continue; |
| 96 | } |
| 97 | mainstone_maps[i].cached = |
| 98 | ioremap_cached(mainstone_maps[i].phys, WINDOW_SIZE); |
| 99 | if (!mainstone_maps[i].cached) |
| 100 | printk(KERN_WARNING "Failed to ioremap cached %s\n", |
| 101 | mainstone_maps[i].name); |
| 102 | simple_map_init(&mainstone_maps[i]); |
| 103 | |
| 104 | printk(KERN_NOTICE |
| 105 | "Probing %s at physical address 0x%08lx" |
| 106 | " (%d-bit bankwidth)\n", |
| 107 | mainstone_maps[i].name, mainstone_maps[i].phys, |
| 108 | mainstone_maps[i].bankwidth * 8); |
| 109 | |
| 110 | mymtds[i] = do_map_probe("cfi_probe", &mainstone_maps[i]); |
| 111 | |
| 112 | if (!mymtds[i]) { |
| 113 | iounmap((void *)mainstone_maps[i].virt); |
| 114 | if (mainstone_maps[i].cached) |
| 115 | iounmap(mainstone_maps[i].cached); |
| 116 | if (!ret) |
| 117 | ret = -EIO; |
| 118 | continue; |
| 119 | } |
| 120 | mymtds[i]->owner = THIS_MODULE; |
| 121 | |
| 122 | ret = parse_mtd_partitions(mymtds[i], probes, |
| 123 | &parsed_parts[i], 0); |
| 124 | |
| 125 | if (ret > 0) |
| 126 | nr_parsed_parts[i] = ret; |
| 127 | } |
| 128 | |
| 129 | if (!mymtds[0] && !mymtds[1]) |
| 130 | return ret; |
| 131 | |
| 132 | for (i = 0; i < 2; i++) { |
| 133 | if (!mymtds[i]) { |
| 134 | printk(KERN_WARNING "%s is absent. Skipping\n", |
| 135 | mainstone_maps[i].name); |
| 136 | } else if (nr_parsed_parts[i]) { |
| 137 | add_mtd_partitions(mymtds[i], parsed_parts[i], |
| 138 | nr_parsed_parts[i]); |
| 139 | } else if (!i) { |
| 140 | printk("Using static partitions on %s\n", |
| 141 | mainstone_maps[i].name); |
| 142 | add_mtd_partitions(mymtds[i], mainstone_partitions, |
| 143 | ARRAY_SIZE(mainstone_partitions)); |
| 144 | } else { |
| 145 | printk("Registering %s as whole device\n", |
| 146 | mainstone_maps[i].name); |
| 147 | add_mtd_device(mymtds[i]); |
| 148 | } |
| 149 | } |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static void __exit cleanup_mainstone(void) |
| 154 | { |
| 155 | int i; |
| 156 | for (i = 0; i < 2; i++) { |
| 157 | if (!mymtds[i]) |
| 158 | continue; |
| 159 | |
| 160 | if (nr_parsed_parts[i] || !i) |
| 161 | del_mtd_partitions(mymtds[i]); |
| 162 | else |
| 163 | del_mtd_device(mymtds[i]); |
| 164 | |
| 165 | map_destroy(mymtds[i]); |
| 166 | iounmap((void *)mainstone_maps[i].virt); |
| 167 | if (mainstone_maps[i].cached) |
| 168 | iounmap(mainstone_maps[i].cached); |
| 169 | kfree(parsed_parts[i]); |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | module_init(init_mainstone); |
| 174 | module_exit(cleanup_mainstone); |
| 175 | |
| 176 | MODULE_LICENSE("GPL"); |
| 177 | MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>"); |
| 178 | MODULE_DESCRIPTION("MTD map driver for Intel Mainstone"); |