126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
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/*
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* $Id: physmap.c,v 1.37 2004/11/28 09:40:40 dwmw2 Exp $
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*
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* Normal mappings of chips in physical memory
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*
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* Copyright (C) 2003 MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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*
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* 031022 - [jsun] add run-time configure and partition setup
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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 <linux/slab.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/config.h>
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#include <linux/mtd/partitions.h>
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static struct mtd_info *mymtd;
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struct map_info physmap_map = {
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.name = "phys_mapped_flash",
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.phys = CONFIG_MTD_PHYSMAP_START,
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.size = CONFIG_MTD_PHYSMAP_LEN,
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.bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH,
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};
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#ifdef CONFIG_MTD_PARTITIONS
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static struct mtd_partition *mtd_parts;
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static int mtd_parts_nb;
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static int num_physmap_partitions;
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static struct mtd_partition *physmap_partitions;
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static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
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void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
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{
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physmap_partitions=parts;
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num_physmap_partitions=num_parts;
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}
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#endif /* CONFIG_MTD_PARTITIONS */
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static int __init init_physmap(void)
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{
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static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
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const char **type;
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printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys);
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physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size);
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if (!physmap_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(&physmap_map);
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mymtd = NULL;
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type = rom_probe_types;
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for(; !mymtd && *type; type++) {
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mymtd = do_map_probe(*type, &physmap_map);
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}
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if (mymtd) {
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mymtd->owner = THIS_MODULE;
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#ifdef CONFIG_MTD_PARTITIONS
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mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes,
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&mtd_parts, 0);
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if (mtd_parts_nb > 0)
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{
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add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
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return 0;
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}
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if (num_physmap_partitions != 0)
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{
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printk(KERN_NOTICE
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"Using physmap partition definition\n");
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add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions);
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return 0;
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}
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#endif
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add_mtd_device(mymtd);
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return 0;
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}
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iounmap(physmap_map.virt);
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return -ENXIO;
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}
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static void __exit cleanup_physmap(void)
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{
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#ifdef CONFIG_MTD_PARTITIONS
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if (mtd_parts_nb) {
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del_mtd_partitions(mymtd);
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kfree(mtd_parts);
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} else if (num_physmap_partitions) {
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del_mtd_partitions(mymtd);
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} else {
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del_mtd_device(mymtd);
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}
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#else
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del_mtd_device(mymtd);
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#endif
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map_destroy(mymtd);
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iounmap(physmap_map.virt);
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physmap_map.virt = NULL;
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}
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module_init(init_physmap);
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module_exit(cleanup_physmap);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
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MODULE_DESCRIPTION("Generic configurable MTD map driver");
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