Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /*====================================================================== |
| 2 | |
| 3 | drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 4 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | Copyright (C) 2000 ARM Limited |
| 6 | Copyright (C) 2003 Deep Blue Solutions Ltd. |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 7 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 12 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 21 | |
| 22 | This is access code for flashes using ARM's flash partitioning |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | standards. |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | ======================================================================*/ |
| 26 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/module.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/ioport.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 32 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/init.h> |
| 34 | |
| 35 | #include <linux/mtd/mtd.h> |
| 36 | #include <linux/mtd/map.h> |
| 37 | #include <linux/mtd/partitions.h> |
| 38 | |
| 39 | #include <asm/mach/flash.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 40 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <asm/io.h> |
| 42 | #include <asm/system.h> |
| 43 | |
| 44 | #ifdef CONFIG_ARCH_P720T |
| 45 | #define FLASH_BASE (0x04000000) |
| 46 | #define FLASH_SIZE (64*1024*1024) |
| 47 | #endif |
| 48 | |
| 49 | struct armflash_info { |
| 50 | struct flash_platform_data *plat; |
| 51 | struct resource *res; |
| 52 | struct mtd_partition *parts; |
| 53 | struct mtd_info *mtd; |
| 54 | struct map_info map; |
| 55 | }; |
| 56 | |
| 57 | static void armflash_set_vpp(struct map_info *map, int on) |
| 58 | { |
| 59 | struct armflash_info *info = container_of(map, struct armflash_info, map); |
| 60 | |
| 61 | if (info->plat && info->plat->set_vpp) |
| 62 | info->plat->set_vpp(on); |
| 63 | } |
| 64 | |
| 65 | static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL }; |
| 66 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 67 | static int armflash_probe(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | struct flash_platform_data *plat = dev->dev.platform_data; |
| 70 | struct resource *res = dev->resource; |
| 71 | unsigned int size = res->end - res->start + 1; |
| 72 | struct armflash_info *info; |
| 73 | int err; |
| 74 | void __iomem *base; |
| 75 | |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 76 | info = kzalloc(sizeof(struct armflash_info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | if (!info) { |
| 78 | err = -ENOMEM; |
| 79 | goto out; |
| 80 | } |
| 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | info->plat = plat; |
| 83 | if (plat && plat->init) { |
| 84 | err = plat->init(); |
| 85 | if (err) |
| 86 | goto no_resource; |
| 87 | } |
| 88 | |
| 89 | info->res = request_mem_region(res->start, size, "armflash"); |
| 90 | if (!info->res) { |
| 91 | err = -EBUSY; |
| 92 | goto no_resource; |
| 93 | } |
| 94 | |
| 95 | base = ioremap(res->start, size); |
| 96 | if (!base) { |
| 97 | err = -ENOMEM; |
| 98 | goto no_mem; |
| 99 | } |
| 100 | |
| 101 | /* |
| 102 | * look for CFI based flash parts fitted to this board |
| 103 | */ |
| 104 | info->map.size = size; |
| 105 | info->map.bankwidth = plat->width; |
| 106 | info->map.phys = res->start; |
| 107 | info->map.virt = base; |
| 108 | info->map.name = dev->dev.bus_id; |
| 109 | info->map.set_vpp = armflash_set_vpp; |
| 110 | |
| 111 | simple_map_init(&info->map); |
| 112 | |
| 113 | /* |
| 114 | * Also, the CFI layer automatically works out what size |
| 115 | * of chips we have, and does the necessary identification |
| 116 | * for us automatically. |
| 117 | */ |
| 118 | info->mtd = do_map_probe(plat->map_name, &info->map); |
| 119 | if (!info->mtd) { |
| 120 | err = -ENXIO; |
| 121 | goto no_device; |
| 122 | } |
| 123 | |
| 124 | info->mtd->owner = THIS_MODULE; |
| 125 | |
| 126 | err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0); |
| 127 | if (err > 0) { |
| 128 | err = add_mtd_partitions(info->mtd, info->parts, err); |
| 129 | if (err) |
| 130 | printk(KERN_ERR |
| 131 | "mtd partition registration failed: %d\n", err); |
| 132 | } |
| 133 | |
| 134 | if (err == 0) |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 135 | platform_set_drvdata(dev, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
| 137 | /* |
| 138 | * If we got an error, free all resources. |
| 139 | */ |
| 140 | if (err < 0) { |
| 141 | if (info->mtd) { |
| 142 | del_mtd_partitions(info->mtd); |
| 143 | map_destroy(info->mtd); |
| 144 | } |
Jesper Juhl | fa67164 | 2005-11-07 01:01:27 -0800 | [diff] [blame] | 145 | kfree(info->parts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | no_device: |
| 148 | iounmap(base); |
| 149 | no_mem: |
| 150 | release_mem_region(res->start, size); |
| 151 | no_resource: |
| 152 | if (plat && plat->exit) |
| 153 | plat->exit(); |
| 154 | kfree(info); |
| 155 | } |
| 156 | out: |
| 157 | return err; |
| 158 | } |
| 159 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 160 | static int armflash_remove(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 162 | struct armflash_info *info = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 164 | platform_set_drvdata(dev, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
| 166 | if (info) { |
| 167 | if (info->mtd) { |
| 168 | del_mtd_partitions(info->mtd); |
| 169 | map_destroy(info->mtd); |
| 170 | } |
Jesper Juhl | fa67164 | 2005-11-07 01:01:27 -0800 | [diff] [blame] | 171 | kfree(info->parts); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | iounmap(info->map.virt); |
| 174 | release_resource(info->res); |
| 175 | kfree(info->res); |
| 176 | |
| 177 | if (info->plat && info->plat->exit) |
| 178 | info->plat->exit(); |
| 179 | |
| 180 | kfree(info); |
| 181 | } |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 186 | static struct platform_driver armflash_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | .probe = armflash_probe, |
| 188 | .remove = armflash_remove, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 189 | .driver = { |
| 190 | .name = "armflash", |
Kay Sievers | 41d867c | 2008-04-18 13:44:26 -0700 | [diff] [blame] | 191 | .owner = THIS_MODULE, |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 192 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
| 195 | static int __init armflash_init(void) |
| 196 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 197 | return platform_driver_register(&armflash_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static void __exit armflash_exit(void) |
| 201 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 202 | platform_driver_unregister(&armflash_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | module_init(armflash_init); |
| 206 | module_exit(armflash_exit); |
| 207 | |
| 208 | MODULE_AUTHOR("ARM Ltd"); |
| 209 | MODULE_DESCRIPTION("ARM Integrator CFI map driver"); |
| 210 | MODULE_LICENSE("GPL"); |
Kay Sievers | 41d867c | 2008-04-18 13:44:26 -0700 | [diff] [blame] | 211 | MODULE_ALIAS("platform:armflash"); |