drivers/mtd/maps/rpxlite.c

   1 /*
   2  * $Id: rpxlite.c,v 1.22 2004/11/04 13:24:15 gleixner Exp $
   3  *
   4  * Handle mapping of the flash on the RPX Lite and CLLF boards
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <asm/io.h>
  12 #include <linux/mtd/mtd.h>
  13 #include <linux/mtd/map.h>
  14
  15
  16 #define WINDOW_ADDR 0xfe000000
  17 #define WINDOW_SIZE 0x800000
  18
  19 static struct mtd_info *mymtd;
  20
  21 static struct map_info rpxlite_map = {
  22         .name = "RPX",
  23         .size = WINDOW_SIZE,
  24         .bankwidth = 4,
  25         .phys = WINDOW_ADDR,
  26 };
  27
  28 int __init init_rpxlite(void)
  29 {
  30         printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
  31         rpxlite_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
  32
  33         if (!rpxlite_map.virt) {
  34                 printk("Failed to ioremap\n");
  35                 return -EIO;
  36         }
  37         simple_map_init(&rpxlite_map);
  38         mymtd = do_map_probe("cfi_probe", &rpxlite_map);
  39         if (mymtd) {
  40                 mymtd->owner = THIS_MODULE;
  41                 add_mtd_device(mymtd);
  42                 return 0;
  43         }
  44
  45         iounmap((void *)rpxlite_map.virt);
  46         return -ENXIO;
  47 }
  48
  49 static void __exit cleanup_rpxlite(void)
  50 {
  51         if (mymtd) {
  52                 del_mtd_device(mymtd);
  53                 map_destroy(mymtd);
  54         }
  55         if (rpxlite_map.virt) {
  56                 iounmap((void *)rpxlite_map.virt);
  57                 rpxlite_map.virt = 0;
  58         }
  59 }
  60
  61 module_init(init_rpxlite);
  62 module_exit(cleanup_rpxlite);
  63
  64 MODULE_LICENSE("GPL");
  65 MODULE_AUTHOR("Arnold Christensen <AKC@pel.dk>");
  66 MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");