Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Flash on Cirrus CDB89712 |
| 3 | * |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 4 | * $Id: cdb89712.c,v 1.11 2005/11/07 11:14:26 gleixner Exp $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/ioport.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <asm/io.h> |
| 13 | #include <asm/arch/hardware.h> |
| 14 | #include <linux/mtd/mtd.h> |
| 15 | #include <linux/mtd/map.h> |
| 16 | #include <linux/mtd/partitions.h> |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 21 | static struct mtd_info *flash_mtd; |
| 22 | |
| 23 | struct map_info cdb89712_flash_map = { |
| 24 | .name = "flash", |
| 25 | .size = FLASH_SIZE, |
| 26 | .bankwidth = FLASH_WIDTH, |
| 27 | .phys = FLASH_START, |
| 28 | }; |
| 29 | |
| 30 | struct resource cdb89712_flash_resource = { |
| 31 | .name = "Flash", |
| 32 | .start = FLASH_START, |
| 33 | .end = FLASH_START + FLASH_SIZE - 1, |
| 34 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 35 | }; |
| 36 | |
| 37 | static int __init init_cdb89712_flash (void) |
| 38 | { |
| 39 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | if (request_resource (&ioport_resource, &cdb89712_flash_resource)) { |
| 42 | printk(KERN_NOTICE "Failed to reserve Cdb89712 FLASH space\n"); |
| 43 | err = -EBUSY; |
| 44 | goto out; |
| 45 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | cdb89712_flash_map.virt = ioremap(FLASH_START, FLASH_SIZE); |
| 48 | if (!cdb89712_flash_map.virt) { |
| 49 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 FLASH space\n"); |
| 50 | err = -EIO; |
| 51 | goto out_resource; |
| 52 | } |
| 53 | simple_map_init(&cdb89712_flash_map); |
| 54 | flash_mtd = do_map_probe("cfi_probe", &cdb89712_flash_map); |
| 55 | if (!flash_mtd) { |
| 56 | flash_mtd = do_map_probe("map_rom", &cdb89712_flash_map); |
| 57 | if (flash_mtd) |
| 58 | flash_mtd->erasesize = 0x10000; |
| 59 | } |
| 60 | if (!flash_mtd) { |
| 61 | printk("FLASH probe failed\n"); |
| 62 | err = -ENXIO; |
| 63 | goto out_ioremap; |
| 64 | } |
| 65 | |
| 66 | flash_mtd->owner = THIS_MODULE; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | if (add_mtd_device(flash_mtd)) { |
| 69 | printk("FLASH device addition failed\n"); |
| 70 | err = -ENOMEM; |
| 71 | goto out_probe; |
| 72 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 73 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | return 0; |
| 75 | |
| 76 | out_probe: |
| 77 | map_destroy(flash_mtd); |
| 78 | flash_mtd = 0; |
| 79 | out_ioremap: |
| 80 | iounmap((void *)cdb89712_flash_map.virt); |
| 81 | out_resource: |
| 82 | release_resource (&cdb89712_flash_resource); |
| 83 | out: |
| 84 | return err; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | |
| 89 | |
| 90 | |
| 91 | static struct mtd_info *sram_mtd; |
| 92 | |
| 93 | struct map_info cdb89712_sram_map = { |
| 94 | .name = "SRAM", |
| 95 | .size = SRAM_SIZE, |
| 96 | .bankwidth = SRAM_WIDTH, |
| 97 | .phys = SRAM_START, |
| 98 | }; |
| 99 | |
| 100 | struct resource cdb89712_sram_resource = { |
| 101 | .name = "SRAM", |
| 102 | .start = SRAM_START, |
| 103 | .end = SRAM_START + SRAM_SIZE - 1, |
| 104 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 105 | }; |
| 106 | |
| 107 | static int __init init_cdb89712_sram (void) |
| 108 | { |
| 109 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | if (request_resource (&ioport_resource, &cdb89712_sram_resource)) { |
| 112 | printk(KERN_NOTICE "Failed to reserve Cdb89712 SRAM space\n"); |
| 113 | err = -EBUSY; |
| 114 | goto out; |
| 115 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | cdb89712_sram_map.virt = ioremap(SRAM_START, SRAM_SIZE); |
| 118 | if (!cdb89712_sram_map.virt) { |
| 119 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 SRAM space\n"); |
| 120 | err = -EIO; |
| 121 | goto out_resource; |
| 122 | } |
| 123 | simple_map_init(&cdb89712_sram_map); |
| 124 | sram_mtd = do_map_probe("map_ram", &cdb89712_sram_map); |
| 125 | if (!sram_mtd) { |
| 126 | printk("SRAM probe failed\n"); |
| 127 | err = -ENXIO; |
| 128 | goto out_ioremap; |
| 129 | } |
| 130 | |
| 131 | sram_mtd->owner = THIS_MODULE; |
| 132 | sram_mtd->erasesize = 16; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | if (add_mtd_device(sram_mtd)) { |
| 135 | printk("SRAM device addition failed\n"); |
| 136 | err = -ENOMEM; |
| 137 | goto out_probe; |
| 138 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 139 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | return 0; |
| 141 | |
| 142 | out_probe: |
| 143 | map_destroy(sram_mtd); |
| 144 | sram_mtd = 0; |
| 145 | out_ioremap: |
| 146 | iounmap((void *)cdb89712_sram_map.virt); |
| 147 | out_resource: |
| 148 | release_resource (&cdb89712_sram_resource); |
| 149 | out: |
| 150 | return err; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | |
| 155 | |
| 156 | |
| 157 | |
| 158 | |
| 159 | static struct mtd_info *bootrom_mtd; |
| 160 | |
| 161 | struct map_info cdb89712_bootrom_map = { |
| 162 | .name = "BootROM", |
| 163 | .size = BOOTROM_SIZE, |
| 164 | .bankwidth = BOOTROM_WIDTH, |
| 165 | .phys = BOOTROM_START, |
| 166 | }; |
| 167 | |
| 168 | struct resource cdb89712_bootrom_resource = { |
| 169 | .name = "BootROM", |
| 170 | .start = BOOTROM_START, |
| 171 | .end = BOOTROM_START + BOOTROM_SIZE - 1, |
| 172 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 173 | }; |
| 174 | |
| 175 | static int __init init_cdb89712_bootrom (void) |
| 176 | { |
| 177 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | if (request_resource (&ioport_resource, &cdb89712_bootrom_resource)) { |
| 180 | printk(KERN_NOTICE "Failed to reserve Cdb89712 BOOTROM space\n"); |
| 181 | err = -EBUSY; |
| 182 | goto out; |
| 183 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | cdb89712_bootrom_map.virt = ioremap(BOOTROM_START, BOOTROM_SIZE); |
| 186 | if (!cdb89712_bootrom_map.virt) { |
| 187 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 BootROM space\n"); |
| 188 | err = -EIO; |
| 189 | goto out_resource; |
| 190 | } |
| 191 | simple_map_init(&cdb89712_bootrom_map); |
| 192 | bootrom_mtd = do_map_probe("map_rom", &cdb89712_bootrom_map); |
| 193 | if (!bootrom_mtd) { |
| 194 | printk("BootROM probe failed\n"); |
| 195 | err = -ENXIO; |
| 196 | goto out_ioremap; |
| 197 | } |
| 198 | |
| 199 | bootrom_mtd->owner = THIS_MODULE; |
| 200 | bootrom_mtd->erasesize = 0x10000; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 201 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | if (add_mtd_device(bootrom_mtd)) { |
| 203 | printk("BootROM device addition failed\n"); |
| 204 | err = -ENOMEM; |
| 205 | goto out_probe; |
| 206 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | return 0; |
| 209 | |
| 210 | out_probe: |
| 211 | map_destroy(bootrom_mtd); |
| 212 | bootrom_mtd = 0; |
| 213 | out_ioremap: |
| 214 | iounmap((void *)cdb89712_bootrom_map.virt); |
| 215 | out_resource: |
| 216 | release_resource (&cdb89712_bootrom_resource); |
| 217 | out: |
| 218 | return err; |
| 219 | } |
| 220 | |
| 221 | |
| 222 | |
| 223 | |
| 224 | |
| 225 | static int __init init_cdb89712_maps(void) |
| 226 | { |
| 227 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 228 | printk(KERN_INFO "Cirrus CDB89712 MTD mappings:\n Flash 0x%x at 0x%x\n SRAM 0x%x at 0x%x\n BootROM 0x%x at 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | FLASH_SIZE, FLASH_START, SRAM_SIZE, SRAM_START, BOOTROM_SIZE, BOOTROM_START); |
| 230 | |
| 231 | init_cdb89712_flash(); |
| 232 | init_cdb89712_sram(); |
| 233 | init_cdb89712_bootrom(); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | return 0; |
| 236 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | static void __exit cleanup_cdb89712_maps(void) |
| 240 | { |
| 241 | if (sram_mtd) { |
| 242 | del_mtd_device(sram_mtd); |
| 243 | map_destroy(sram_mtd); |
| 244 | iounmap((void *)cdb89712_sram_map.virt); |
| 245 | release_resource (&cdb89712_sram_resource); |
| 246 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | if (flash_mtd) { |
| 249 | del_mtd_device(flash_mtd); |
| 250 | map_destroy(flash_mtd); |
| 251 | iounmap((void *)cdb89712_flash_map.virt); |
| 252 | release_resource (&cdb89712_flash_resource); |
| 253 | } |
| 254 | |
| 255 | if (bootrom_mtd) { |
| 256 | del_mtd_device(bootrom_mtd); |
| 257 | map_destroy(bootrom_mtd); |
| 258 | iounmap((void *)cdb89712_bootrom_map.virt); |
| 259 | release_resource (&cdb89712_bootrom_resource); |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | module_init(init_cdb89712_maps); |
| 264 | module_exit(cleanup_cdb89712_maps); |
| 265 | |
| 266 | MODULE_AUTHOR("Ray L"); |
| 267 | MODULE_DESCRIPTION("ARM CDB89712 map driver"); |
| 268 | MODULE_LICENSE("GPL"); |