release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/mtd/maps/rpxlite.c

   1 /*
   2  * Handle mapping of the flash on the RPX Lite and CLLF boards
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/types.h>
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9 #include <asm/io.h>
  10 #include <linux/mtd/mtd.h>
  11 #include <linux/mtd/map.h>
  12
  13
  14 #define WINDOW_ADDR 0xfe000000
  15 #define WINDOW_SIZE 0x800000
  16
  17 static struct mtd_info *mymtd;
  18
  19 static struct map_info rpxlite_map = {
  20         .name = "RPX",
  21         .size = WINDOW_SIZE,
  22         .bankwidth = 4,
  23         .phys = WINDOW_ADDR,
  24 };
  25
  26 static int __init init_rpxlite(void)
  27 {
  28         printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
  29         rpxlite_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
  30
  31         if (!rpxlite_map.virt) {
  32                 printk("Failed to ioremap\n");
  33                 return -EIO;
  34         }
  35         simple_map_init(&rpxlite_map);
  36         mymtd = do_map_probe("cfi_probe", &rpxlite_map);
  37         if (mymtd) {
  38                 mymtd->owner = THIS_MODULE;
  39                 add_mtd_device(mymtd);
  40                 return 0;
  41         }
  42
  43         iounmap((void *)rpxlite_map.virt);
  44         return -ENXIO;
  45 }
  46
  47 static void __exit cleanup_rpxlite(void)
  48 {
  49         if (mymtd) {
  50                 del_mtd_device(mymtd);
  51                 map_destroy(mymtd);
  52         }
  53         if (rpxlite_map.virt) {
  54                 iounmap((void *)rpxlite_map.virt);
  55                 rpxlite_map.virt = 0;
  56         }
  57 }
  58
  59 module_init(init_rpxlite);
  60 module_exit(cleanup_rpxlite);
  61
  62 MODULE_LICENSE("GPL");
  63 MODULE_AUTHOR("Arnold Christensen <AKC@pel.dk>");
  64 MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");