LXR linux/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
  17static struct mtd_info *mymtd;
  18
  19static struct map_info rpxlite_map = {
  20        .name = "RPX",
  21        .size = WINDOW_SIZE,
  22        .bankwidth = 4,
  23        .phys = WINDOW_ADDR,
  24};
  25
  26static 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
  47static 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
  59module_init(init_rpxlite);
  60module_exit(cleanup_rpxlite);
  61
  62MODULE_LICENSE("GPL");
  63MODULE_AUTHOR("Arnold Christensen <AKC@pel.dk>");
  64MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");
  65