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phoenix |
/*
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* $Id: mbx860.c,v 1.1.1.1 2004-04-15 01:51:52 phoenix 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 <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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__u8 mbx_read8(struct map_info *map, unsigned long ofs)
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{
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return readb(map->map_priv_1 + ofs);
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}
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__u16 mbx_read16(struct map_info *map, unsigned long ofs)
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{
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return readw(map->map_priv_1 + ofs);
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}
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__u32 mbx_read32(struct map_info *map, unsigned long ofs)
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{
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return readl(map->map_priv_1 + ofs);
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}
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void mbx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
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}
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void mbx_write8(struct map_info *map, __u8 d, unsigned long adr)
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{
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writeb(d, map->map_priv_1 + adr);
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}
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void mbx_write16(struct map_info *map, __u16 d, unsigned long adr)
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{
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writew(d, map->map_priv_1 + adr);
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}
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void mbx_write32(struct map_info *map, __u32 d, unsigned long adr)
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{
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writel(d, map->map_priv_1 + adr);
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}
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void mbx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
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{
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memcpy_toio((void *)(map->map_priv_1 + to), from, len);
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}
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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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buswidth: 4,
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read8: mbx_read8,
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read16: mbx_read16,
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read32: mbx_read32,
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copy_from: mbx_copy_from,
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write8: mbx_write8,
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write16: mbx_write16,
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write32: mbx_write32,
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copy_to: mbx_copy_to
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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: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
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mbx_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
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if (!mbx_map.map_priv_1) {
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printk("Failed to ioremap\n");
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return -EIO;
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}
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mymtd = do_map_probe("jedec_probe", &mbx_map);
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if (mymtd) {
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mymtd->module = 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.map_priv_1);
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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.map_priv_1) {
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iounmap((void *)mbx_map.map_priv_1);
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mbx_map.map_priv_1 = 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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