Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Flash on Cirrus CDB89712 |
| 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/module.h> |
| 7 | #include <linux/types.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/ioport.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <asm/io.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame^] | 12 | #include <mach/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/mtd/mtd.h> |
| 14 | #include <linux/mtd/map.h> |
| 15 | #include <linux/mtd/partitions.h> |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | static struct mtd_info *flash_mtd; |
| 21 | |
| 22 | struct map_info cdb89712_flash_map = { |
| 23 | .name = "flash", |
| 24 | .size = FLASH_SIZE, |
| 25 | .bankwidth = FLASH_WIDTH, |
| 26 | .phys = FLASH_START, |
| 27 | }; |
| 28 | |
| 29 | struct resource cdb89712_flash_resource = { |
| 30 | .name = "Flash", |
| 31 | .start = FLASH_START, |
| 32 | .end = FLASH_START + FLASH_SIZE - 1, |
| 33 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 34 | }; |
| 35 | |
| 36 | static int __init init_cdb89712_flash (void) |
| 37 | { |
| 38 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | if (request_resource (&ioport_resource, &cdb89712_flash_resource)) { |
| 41 | printk(KERN_NOTICE "Failed to reserve Cdb89712 FLASH space\n"); |
| 42 | err = -EBUSY; |
| 43 | goto out; |
| 44 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | cdb89712_flash_map.virt = ioremap(FLASH_START, FLASH_SIZE); |
| 47 | if (!cdb89712_flash_map.virt) { |
| 48 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 FLASH space\n"); |
| 49 | err = -EIO; |
| 50 | goto out_resource; |
| 51 | } |
| 52 | simple_map_init(&cdb89712_flash_map); |
| 53 | flash_mtd = do_map_probe("cfi_probe", &cdb89712_flash_map); |
| 54 | if (!flash_mtd) { |
| 55 | flash_mtd = do_map_probe("map_rom", &cdb89712_flash_map); |
| 56 | if (flash_mtd) |
| 57 | flash_mtd->erasesize = 0x10000; |
| 58 | } |
| 59 | if (!flash_mtd) { |
| 60 | printk("FLASH probe failed\n"); |
| 61 | err = -ENXIO; |
| 62 | goto out_ioremap; |
| 63 | } |
| 64 | |
| 65 | flash_mtd->owner = THIS_MODULE; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | if (add_mtd_device(flash_mtd)) { |
| 68 | printk("FLASH device addition failed\n"); |
| 69 | err = -ENOMEM; |
| 70 | goto out_probe; |
| 71 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | return 0; |
| 74 | |
| 75 | out_probe: |
| 76 | map_destroy(flash_mtd); |
| 77 | flash_mtd = 0; |
| 78 | out_ioremap: |
| 79 | iounmap((void *)cdb89712_flash_map.virt); |
| 80 | out_resource: |
| 81 | release_resource (&cdb89712_flash_resource); |
| 82 | out: |
| 83 | return err; |
| 84 | } |
| 85 | |
| 86 | |
| 87 | |
| 88 | |
| 89 | |
| 90 | static struct mtd_info *sram_mtd; |
| 91 | |
| 92 | struct map_info cdb89712_sram_map = { |
| 93 | .name = "SRAM", |
| 94 | .size = SRAM_SIZE, |
| 95 | .bankwidth = SRAM_WIDTH, |
| 96 | .phys = SRAM_START, |
| 97 | }; |
| 98 | |
| 99 | struct resource cdb89712_sram_resource = { |
| 100 | .name = "SRAM", |
| 101 | .start = SRAM_START, |
| 102 | .end = SRAM_START + SRAM_SIZE - 1, |
| 103 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 104 | }; |
| 105 | |
| 106 | static int __init init_cdb89712_sram (void) |
| 107 | { |
| 108 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | if (request_resource (&ioport_resource, &cdb89712_sram_resource)) { |
| 111 | printk(KERN_NOTICE "Failed to reserve Cdb89712 SRAM space\n"); |
| 112 | err = -EBUSY; |
| 113 | goto out; |
| 114 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | cdb89712_sram_map.virt = ioremap(SRAM_START, SRAM_SIZE); |
| 117 | if (!cdb89712_sram_map.virt) { |
| 118 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 SRAM space\n"); |
| 119 | err = -EIO; |
| 120 | goto out_resource; |
| 121 | } |
| 122 | simple_map_init(&cdb89712_sram_map); |
| 123 | sram_mtd = do_map_probe("map_ram", &cdb89712_sram_map); |
| 124 | if (!sram_mtd) { |
| 125 | printk("SRAM probe failed\n"); |
| 126 | err = -ENXIO; |
| 127 | goto out_ioremap; |
| 128 | } |
| 129 | |
| 130 | sram_mtd->owner = THIS_MODULE; |
| 131 | sram_mtd->erasesize = 16; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | if (add_mtd_device(sram_mtd)) { |
| 134 | printk("SRAM device addition failed\n"); |
| 135 | err = -ENOMEM; |
| 136 | goto out_probe; |
| 137 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | return 0; |
| 140 | |
| 141 | out_probe: |
| 142 | map_destroy(sram_mtd); |
| 143 | sram_mtd = 0; |
| 144 | out_ioremap: |
| 145 | iounmap((void *)cdb89712_sram_map.virt); |
| 146 | out_resource: |
| 147 | release_resource (&cdb89712_sram_resource); |
| 148 | out: |
| 149 | return err; |
| 150 | } |
| 151 | |
| 152 | |
| 153 | |
| 154 | |
| 155 | |
| 156 | |
| 157 | |
| 158 | static struct mtd_info *bootrom_mtd; |
| 159 | |
| 160 | struct map_info cdb89712_bootrom_map = { |
| 161 | .name = "BootROM", |
| 162 | .size = BOOTROM_SIZE, |
| 163 | .bankwidth = BOOTROM_WIDTH, |
| 164 | .phys = BOOTROM_START, |
| 165 | }; |
| 166 | |
| 167 | struct resource cdb89712_bootrom_resource = { |
| 168 | .name = "BootROM", |
| 169 | .start = BOOTROM_START, |
| 170 | .end = BOOTROM_START + BOOTROM_SIZE - 1, |
| 171 | .flags = IORESOURCE_IO | IORESOURCE_BUSY, |
| 172 | }; |
| 173 | |
| 174 | static int __init init_cdb89712_bootrom (void) |
| 175 | { |
| 176 | int err; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | if (request_resource (&ioport_resource, &cdb89712_bootrom_resource)) { |
| 179 | printk(KERN_NOTICE "Failed to reserve Cdb89712 BOOTROM space\n"); |
| 180 | err = -EBUSY; |
| 181 | goto out; |
| 182 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | cdb89712_bootrom_map.virt = ioremap(BOOTROM_START, BOOTROM_SIZE); |
| 185 | if (!cdb89712_bootrom_map.virt) { |
| 186 | printk(KERN_NOTICE "Failed to ioremap Cdb89712 BootROM space\n"); |
| 187 | err = -EIO; |
| 188 | goto out_resource; |
| 189 | } |
| 190 | simple_map_init(&cdb89712_bootrom_map); |
| 191 | bootrom_mtd = do_map_probe("map_rom", &cdb89712_bootrom_map); |
| 192 | if (!bootrom_mtd) { |
| 193 | printk("BootROM probe failed\n"); |
| 194 | err = -ENXIO; |
| 195 | goto out_ioremap; |
| 196 | } |
| 197 | |
| 198 | bootrom_mtd->owner = THIS_MODULE; |
| 199 | bootrom_mtd->erasesize = 0x10000; |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | if (add_mtd_device(bootrom_mtd)) { |
| 202 | printk("BootROM device addition failed\n"); |
| 203 | err = -ENOMEM; |
| 204 | goto out_probe; |
| 205 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | return 0; |
| 208 | |
| 209 | out_probe: |
| 210 | map_destroy(bootrom_mtd); |
| 211 | bootrom_mtd = 0; |
| 212 | out_ioremap: |
| 213 | iounmap((void *)cdb89712_bootrom_map.virt); |
| 214 | out_resource: |
| 215 | release_resource (&cdb89712_bootrom_resource); |
| 216 | out: |
| 217 | return err; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | |
| 222 | |
| 223 | |
| 224 | static int __init init_cdb89712_maps(void) |
| 225 | { |
| 226 | |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 227 | 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] | 228 | FLASH_SIZE, FLASH_START, SRAM_SIZE, SRAM_START, BOOTROM_SIZE, BOOTROM_START); |
| 229 | |
| 230 | init_cdb89712_flash(); |
| 231 | init_cdb89712_sram(); |
| 232 | init_cdb89712_bootrom(); |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 233 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return 0; |
| 235 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | |
| 238 | static void __exit cleanup_cdb89712_maps(void) |
| 239 | { |
| 240 | if (sram_mtd) { |
| 241 | del_mtd_device(sram_mtd); |
| 242 | map_destroy(sram_mtd); |
| 243 | iounmap((void *)cdb89712_sram_map.virt); |
| 244 | release_resource (&cdb89712_sram_resource); |
| 245 | } |
Thomas Gleixner | 69f34c9 | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 246 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if (flash_mtd) { |
| 248 | del_mtd_device(flash_mtd); |
| 249 | map_destroy(flash_mtd); |
| 250 | iounmap((void *)cdb89712_flash_map.virt); |
| 251 | release_resource (&cdb89712_flash_resource); |
| 252 | } |
| 253 | |
| 254 | if (bootrom_mtd) { |
| 255 | del_mtd_device(bootrom_mtd); |
| 256 | map_destroy(bootrom_mtd); |
| 257 | iounmap((void *)cdb89712_bootrom_map.virt); |
| 258 | release_resource (&cdb89712_bootrom_resource); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | module_init(init_cdb89712_maps); |
| 263 | module_exit(cleanup_cdb89712_maps); |
| 264 | |
| 265 | MODULE_AUTHOR("Ray L"); |
| 266 | MODULE_DESCRIPTION("ARM CDB89712 map driver"); |
| 267 | MODULE_LICENSE("GPL"); |