Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * drivers/mtd/maps/redwood.c |
| 3 | * |
| 4 | * FLASH map for the IBM Redwood 4/5/6 boards. |
| 5 | * |
| 6 | * Author: MontaVista Software, Inc. <source@mvista.com> |
| 7 | * |
| 8 | * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under |
| 9 | * the terms of the GNU General Public License version 2. This program |
| 10 | * is licensed "as is" without any warranty of any kind, whether express |
| 11 | * or implied. |
| 12 | */ |
| 13 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/init.h> |
| 18 | |
| 19 | #include <linux/mtd/mtd.h> |
| 20 | #include <linux/mtd/map.h> |
| 21 | #include <linux/mtd/partitions.h> |
| 22 | |
| 23 | #include <asm/io.h> |
| 24 | |
| 25 | #if !defined (CONFIG_REDWOOD_6) |
| 26 | |
| 27 | #define WINDOW_ADDR 0xffc00000 |
| 28 | #define WINDOW_SIZE 0x00400000 |
| 29 | |
| 30 | #define RW_PART0_OF 0 |
| 31 | #define RW_PART0_SZ 0x10000 |
| 32 | #define RW_PART1_OF RW_PART0_SZ |
| 33 | #define RW_PART1_SZ 0x200000 - 0x10000 |
| 34 | #define RW_PART2_OF 0x200000 |
| 35 | #define RW_PART2_SZ 0x10000 |
| 36 | #define RW_PART3_OF 0x210000 |
| 37 | #define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000) |
| 38 | #define RW_PART4_OF 0x3e0000 |
| 39 | #define RW_PART4_SZ 0x20000 |
| 40 | |
| 41 | static struct mtd_partition redwood_flash_partitions[] = { |
| 42 | { |
| 43 | .name = "Redwood OpenBIOS Vital Product Data", |
| 44 | .offset = RW_PART0_OF, |
| 45 | .size = RW_PART0_SZ, |
| 46 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 47 | }, |
| 48 | { |
| 49 | .name = "Redwood kernel", |
| 50 | .offset = RW_PART1_OF, |
| 51 | .size = RW_PART1_SZ |
| 52 | }, |
| 53 | { |
| 54 | .name = "Redwood OpenBIOS non-volatile storage", |
| 55 | .offset = RW_PART2_OF, |
| 56 | .size = RW_PART2_SZ, |
| 57 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 58 | }, |
| 59 | { |
| 60 | .name = "Redwood filesystem", |
| 61 | .offset = RW_PART3_OF, |
| 62 | .size = RW_PART3_SZ |
| 63 | }, |
| 64 | { |
| 65 | .name = "Redwood OpenBIOS", |
| 66 | .offset = RW_PART4_OF, |
| 67 | .size = RW_PART4_SZ, |
| 68 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 69 | } |
| 70 | }; |
| 71 | |
| 72 | #else /* CONFIG_REDWOOD_6 */ |
| 73 | /* FIXME: the window is bigger - armin */ |
| 74 | #define WINDOW_ADDR 0xff800000 |
| 75 | #define WINDOW_SIZE 0x00800000 |
| 76 | |
| 77 | #define RW_PART0_OF 0 |
| 78 | #define RW_PART0_SZ 0x400000 /* 4 MiB data */ |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 79 | #define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #define RW_PART1_SZ 0x10000 /* 64K VPD */ |
| 81 | #define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ |
| 82 | #define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000) |
| 83 | #define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ |
| 84 | #define RW_PART3_SZ 0x20000 |
| 85 | |
| 86 | static struct mtd_partition redwood_flash_partitions[] = { |
| 87 | { |
| 88 | .name = "Redwood filesystem", |
| 89 | .offset = RW_PART0_OF, |
| 90 | .size = RW_PART0_SZ |
| 91 | }, |
| 92 | { |
| 93 | .name = "Redwood OpenBIOS Vital Product Data", |
| 94 | .offset = RW_PART1_OF, |
| 95 | .size = RW_PART1_SZ, |
| 96 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 97 | }, |
| 98 | { |
| 99 | .name = "Redwood kernel", |
| 100 | .offset = RW_PART2_OF, |
| 101 | .size = RW_PART2_SZ |
| 102 | }, |
| 103 | { |
| 104 | .name = "Redwood OpenBIOS", |
| 105 | .offset = RW_PART3_OF, |
| 106 | .size = RW_PART3_SZ, |
| 107 | .mask_flags = MTD_WRITEABLE /* force read-only */ |
| 108 | } |
| 109 | }; |
| 110 | |
| 111 | #endif /* CONFIG_REDWOOD_6 */ |
| 112 | |
| 113 | struct map_info redwood_flash_map = { |
| 114 | .name = "IBM Redwood", |
| 115 | .size = WINDOW_SIZE, |
| 116 | .bankwidth = 2, |
| 117 | .phys = WINDOW_ADDR, |
| 118 | }; |
| 119 | |
| 120 | |
Tobias Klauser | 87d10f3 | 2006-03-31 02:29:45 -0800 | [diff] [blame] | 121 | #define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | static struct mtd_info *redwood_mtd; |
| 124 | |
Dmitri Vorobiev | 9a2b397 | 2008-11-25 02:55:04 +0200 | [diff] [blame] | 125 | static int __init init_redwood_flash(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | { |
Amol Lad | 76a5027 | 2006-10-02 09:48:23 +0100 | [diff] [blame] | 127 | int err; |
Amol Lad | 25f0c65 | 2006-09-21 18:12:43 +0530 | [diff] [blame] | 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n", |
| 130 | WINDOW_SIZE, WINDOW_ADDR); |
| 131 | |
| 132 | redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); |
| 133 | |
| 134 | if (!redwood_flash_map.virt) { |
| 135 | printk("init_redwood_flash: failed to ioremap\n"); |
| 136 | return -EIO; |
| 137 | } |
| 138 | simple_map_init(&redwood_flash_map); |
| 139 | |
| 140 | redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map); |
| 141 | |
| 142 | if (redwood_mtd) { |
| 143 | redwood_mtd->owner = THIS_MODULE; |
Amol Lad | 25f0c65 | 2006-09-21 18:12:43 +0530 | [diff] [blame] | 144 | err = add_mtd_partitions(redwood_mtd, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | redwood_flash_partitions, |
| 146 | NUM_REDWOOD_FLASH_PARTITIONS); |
Amol Lad | 25f0c65 | 2006-09-21 18:12:43 +0530 | [diff] [blame] | 147 | if (err) { |
| 148 | printk("init_redwood_flash: add_mtd_partitions failed\n"); |
| 149 | iounmap(redwood_flash_map.virt); |
| 150 | } |
| 151 | return err; |
| 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Amol Lad | 25f0c65 | 2006-09-21 18:12:43 +0530 | [diff] [blame] | 155 | iounmap(redwood_flash_map.virt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | return -ENXIO; |
| 157 | } |
| 158 | |
| 159 | static void __exit cleanup_redwood_flash(void) |
| 160 | { |
| 161 | if (redwood_mtd) { |
| 162 | del_mtd_partitions(redwood_mtd); |
| 163 | /* moved iounmap after map_destroy - armin */ |
| 164 | map_destroy(redwood_mtd); |
| 165 | iounmap((void *)redwood_flash_map.virt); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | module_init(init_redwood_flash); |
| 170 | module_exit(cleanup_redwood_flash); |
| 171 | |
| 172 | MODULE_LICENSE("GPL"); |
| 173 | MODULE_AUTHOR("MontaVista Software <source@mvista.com>"); |
| 174 | MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards"); |