mbx860.c
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- /*
- * $Id: mbx860.c,v 1.1 2001/11/18 19:43:09 dwmw2 Exp $
- *
- * Handle mapping of the flash on MBX860 boards
- *
- * Author: Anton Todorov
- * Copyright: (C) 2001 Emness Technology
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <asm/io.h>
- #include <linux/mtd/mtd.h>
- #include <linux/mtd/map.h>
- #include <linux/mtd/partitions.h>
- #define WINDOW_ADDR 0xfe000000
- #define WINDOW_SIZE 0x00200000
- /* Flash / Partition sizing */
- #define MAX_SIZE_KiB 8192
- #define BOOT_PARTITION_SIZE_KiB 512
- #define KERNEL_PARTITION_SIZE_KiB 5632
- #define APP_PARTITION_SIZE_KiB 2048
- #define NUM_PARTITIONS 3
- /* partition_info gives details on the logical partitions that the split the
- * single flash device into. If the size if zero we use up to the end of the
- * device. */
- static struct mtd_partition partition_info[]={
- { name: "MBX flash BOOT partition",
- offset: 0,
- size: BOOT_PARTITION_SIZE_KiB*1024 },
- { name: "MBX flash DATA partition",
- offset: BOOT_PARTITION_SIZE_KiB*1024,
- size: (KERNEL_PARTITION_SIZE_KiB)*1024 },
- { name: "MBX flash APPLICATION partition",
- offset: (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
- };
-
- static struct mtd_info *mymtd;
- __u8 mbx_read8(struct map_info *map, unsigned long ofs)
- {
- return readb(map->map_priv_1 + ofs);
- }
- __u16 mbx_read16(struct map_info *map, unsigned long ofs)
- {
- return readw(map->map_priv_1 + ofs);
- }
- __u32 mbx_read32(struct map_info *map, unsigned long ofs)
- {
- return readl(map->map_priv_1 + ofs);
- }
- void mbx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
- {
- memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
- }
- void mbx_write8(struct map_info *map, __u8 d, unsigned long adr)
- {
- writeb(d, map->map_priv_1 + adr);
- }
- void mbx_write16(struct map_info *map, __u16 d, unsigned long adr)
- {
- writew(d, map->map_priv_1 + adr);
- }
- void mbx_write32(struct map_info *map, __u32 d, unsigned long adr)
- {
- writel(d, map->map_priv_1 + adr);
- }
- void mbx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
- {
- memcpy_toio((void *)(map->map_priv_1 + to), from, len);
- }
- struct map_info mbx_map = {
- name: "MBX flash",
- size: WINDOW_SIZE,
- buswidth: 4,
- read8: mbx_read8,
- read16: mbx_read16,
- read32: mbx_read32,
- copy_from: mbx_copy_from,
- write8: mbx_write8,
- write16: mbx_write16,
- write32: mbx_write32,
- copy_to: mbx_copy_to
- };
- int __init init_mbx(void)
- {
- printk(KERN_NOTICE "Motorola MBX flash device: %x at %xn", WINDOW_SIZE*4, WINDOW_ADDR);
- mbx_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
- if (!mbx_map.map_priv_1) {
- printk("Failed to ioremapn");
- return -EIO;
- }
- mymtd = do_map_probe("jedec_probe", &mbx_map);
- if (mymtd) {
- mymtd->module = THIS_MODULE;
- add_mtd_device(mymtd);
- add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
- return 0;
- }
- iounmap((void *)mbx_map.map_priv_1);
- return -ENXIO;
- }
- static void __exit cleanup_mbx(void)
- {
- if (mymtd) {
- del_mtd_device(mymtd);
- map_destroy(mymtd);
- }
- if (mbx_map.map_priv_1) {
- iounmap((void *)mbx_map.map_priv_1);
- mbx_map.map_priv_1 = 0;
- }
- }
- module_init(init_mbx);
- module_exit(cleanup_mbx);
- MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
- MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
- MODULE_LICENSE("GPL");