mirror of
https://github.com/torvalds/linux
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100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* $Id: mbx860.c,v 1.9 2005/11/07 11:14:27 gleixner Exp $
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*
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* Handle mapping of the flash on MBX860 boards
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*
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* Author: Anton Todorov
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* Copyright: (C) 2001 Emness Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/io.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/partitions.h>
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#define WINDOW_ADDR 0xfe000000
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#define WINDOW_SIZE 0x00200000
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/* Flash / Partition sizing */
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#define MAX_SIZE_KiB 8192
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#define BOOT_PARTITION_SIZE_KiB 512
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#define KERNEL_PARTITION_SIZE_KiB 5632
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#define APP_PARTITION_SIZE_KiB 2048
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#define NUM_PARTITIONS 3
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/* partition_info gives details on the logical partitions that the split the
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* single flash device into. If the size if zero we use up to the end of the
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* device. */
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static struct mtd_partition partition_info[]={
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{ .name = "MBX flash BOOT partition",
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.offset = 0,
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.size = BOOT_PARTITION_SIZE_KiB*1024 },
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{ .name = "MBX flash DATA partition",
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.offset = BOOT_PARTITION_SIZE_KiB*1024,
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.size = (KERNEL_PARTITION_SIZE_KiB)*1024 },
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{ .name = "MBX flash APPLICATION partition",
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.offset = (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
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};
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static struct mtd_info *mymtd;
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struct map_info mbx_map = {
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.name = "MBX flash",
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.size = WINDOW_SIZE,
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.phys = WINDOW_ADDR,
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.bankwidth = 4,
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};
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int __init init_mbx(void)
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{
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printk(KERN_NOTICE "Motorola MBX flash device: 0x%x at 0x%x\n", WINDOW_SIZE*4, WINDOW_ADDR);
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mbx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
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if (!mbx_map.virt) {
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printk("Failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&mbx_map);
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mymtd = do_map_probe("jedec_probe", &mbx_map);
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if (mymtd) {
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mymtd->owner = THIS_MODULE;
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add_mtd_device(mymtd);
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add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
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return 0;
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}
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iounmap((void *)mbx_map.virt);
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return -ENXIO;
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}
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static void __exit cleanup_mbx(void)
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{
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if (mymtd) {
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del_mtd_device(mymtd);
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map_destroy(mymtd);
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}
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if (mbx_map.virt) {
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iounmap((void *)mbx_map.virt);
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mbx_map.virt = 0;
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}
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}
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module_init(init_mbx);
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module_exit(cleanup_mbx);
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MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
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MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
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MODULE_LICENSE("GPL");
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