96 lines
2 KiB
C
96 lines
2 KiB
C
/*
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* Flash memory access on 4G Systems MTX-1 boards
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*
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* $Id: mtx-1_flash.c,v 1.2 2005/11/07 11:14:27 gleixner Exp $
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*
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* (C) 2005 Bruno Randolf <bruno.randolf@4g-systems.biz>
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* (C) 2005 Jörn Engel <joern@wohnheim.fh-wedel.de>
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*
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.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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#include <asm/io.h>
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static struct map_info mtx1_map = {
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.name = "MTX-1 flash",
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.bankwidth = 4,
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.size = 0x2000000,
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.phys = 0x1E000000,
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};
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static struct mtd_partition mtx1_partitions[] = {
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{
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.name = "filesystem",
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.size = 0x01C00000,
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.offset = 0,
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},{
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.name = "yamon",
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.size = 0x00100000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE,
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},{
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.name = "kernel",
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.size = 0x002c0000,
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.offset = MTDPART_OFS_APPEND,
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},{
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.name = "yamon env",
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.size = 0x00040000,
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.offset = MTDPART_OFS_APPEND,
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}
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};
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static struct mtd_info *mtx1_mtd;
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int __init mtx1_mtd_init(void)
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{
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int ret = -ENXIO;
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simple_map_init(&mtx1_map);
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mtx1_map.virt = ioremap(mtx1_map.phys, mtx1_map.size);
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if (!mtx1_map.virt)
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return -EIO;
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mtx1_mtd = do_map_probe("cfi_probe", &mtx1_map);
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if (!mtx1_mtd)
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goto err;
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mtx1_mtd->owner = THIS_MODULE;
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ret = add_mtd_partitions(mtx1_mtd, mtx1_partitions,
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ARRAY_SIZE(mtx1_partitions));
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if (ret)
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goto err;
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return 0;
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err:
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iounmap(mtx1_map.virt);
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return ret;
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}
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static void __exit mtx1_mtd_cleanup(void)
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{
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if (mtx1_mtd) {
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del_mtd_partitions(mtx1_mtd);
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map_destroy(mtx1_mtd);
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}
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if (mtx1_map.virt)
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iounmap(mtx1_map.virt);
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}
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module_init(mtx1_mtd_init);
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module_exit(mtx1_mtd_cleanup);
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MODULE_AUTHOR("Bruno Randolf <bruno.randolf@4g-systems.biz>");
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MODULE_DESCRIPTION("MTX-1 flash map");
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MODULE_LICENSE("GPL");
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