rpxlite.c

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/*
 * Handle mapping of the flash on the RPX Lite and CLLF boards
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>


#define WINDOW_ADDR 0xfe000000
#define WINDOW_SIZE 0x800000

static struct mtd_info *mymtd;

static struct map_info rpxlite_map = {
    .name = "RPX",
    .size = WINDOW_SIZE,
    .bankwidth = 4,
    .phys = WINDOW_ADDR,
};

static int __init init_rpxlite(void)
{
    printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
    rpxlite_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);

    if (!rpxlite_map.virt) {
        printk("Failed to ioremap\n");
        return -EIO;
    }
    simple_map_init(&rpxlite_map);
    mymtd = do_map_probe("cfi_probe", &rpxlite_map);
    if (mymtd) {
        mymtd->owner = THIS_MODULE;
        mtd_device_register(mymtd, NULL, 0);
        return 0;
    }

    iounmap((void *)rpxlite_map.virt);
    return -ENXIO;
}

static void __exit cleanup_rpxlite(void)
{
    if (mymtd) {
        mtd_device_unregister(mymtd);
        map_destroy(mymtd);
    }
    if (rpxlite_map.virt) {
        iounmap((void *)rpxlite_map.virt);
        rpxlite_map.virt = 0;
    }
}

module_init(init_rpxlite);
module_exit(cleanup_rpxlite);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Arnold Christensen <[email protected]>");
MODULE_DESCRIPTION("MTD map driver for RPX Lite and CLLF boards");