drivers/mtd/maps/cdb89712.c

   1 /*
   2  * Flash on Cirrus CDB89712
   3  *
   4  * $Id: cdb89712.c,v 1.11 2005/11/07 11:14:26 gleixner Exp $
   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;
  40
  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         }
  46
  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;
  67
  68         if (add_mtd_device(flash_mtd)) {
  69                 printk("FLASH device addition failed\n");
  70                 err = -ENOMEM;
  71                 goto out_probe;
  72         }
  73
  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;
 110
 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         }
 116
 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;
 133
 134         if (add_mtd_device(sram_mtd)) {
 135                 printk("SRAM device addition failed\n");
 136                 err = -ENOMEM;
 137                 goto out_probe;
 138         }
 139
 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;
 178
 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         }
 184
 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;
 201
 202         if (add_mtd_device(bootrom_mtd)) {
 203                 printk("BootROM device addition failed\n");
 204                 err = -ENOMEM;
 205                 goto out_probe;
 206         }
 207
 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
 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",
 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();
 234
 235         return 0;
 236 }
 237
 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         }
 247
 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");