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151 lines
3.3 KiB
151 lines
3.3 KiB
/*
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* Mapping for Ocotea user flash
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*
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* Copyright 2002-2004 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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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/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 <linux/config.h>
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#include <asm/io.h>
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#include <asm/ibm44x.h>
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#include <platforms/4xx/ocotea.h>
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static struct mtd_info *flash;
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static struct map_info ocotea_small_map = {
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.name = "Ocotea small flash",
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.size = OCOTEA_SMALL_FLASH_SIZE,
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.buswidth = 1,
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};
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static struct map_info ocotea_large_map = {
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.name = "Ocotea large flash",
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.size = OCOTEA_LARGE_FLASH_SIZE,
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.buswidth = 1,
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};
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static struct mtd_partition ocotea_small_partitions[] = {
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{
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.name = "pibs",
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.offset = 0x0,
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.size = 0x100000,
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}
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};
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static struct mtd_partition ocotea_large_partitions[] = {
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{
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.name = "fs",
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.offset = 0,
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.size = 0x300000,
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},
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{
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.name = "firmware",
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.offset = 0x300000,
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.size = 0x100000,
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}
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};
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int __init init_ocotea(void)
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{
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u8 fpga0_reg;
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u8 *fpga0_adr;
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unsigned long long small_flash_base, large_flash_base;
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fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16);
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if (!fpga0_adr)
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return -ENOMEM;
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fpga0_reg = readb((unsigned long)fpga0_adr);
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iounmap(fpga0_adr);
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if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) {
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small_flash_base = OCOTEA_SMALL_FLASH_HIGH;
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large_flash_base = OCOTEA_LARGE_FLASH_LOW;
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}
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else {
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small_flash_base = OCOTEA_SMALL_FLASH_LOW;
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large_flash_base = OCOTEA_LARGE_FLASH_HIGH;
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}
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ocotea_small_map.phys = small_flash_base;
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ocotea_small_map.virt = ioremap64(small_flash_base,
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ocotea_small_map.size);
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if (!ocotea_small_map.virt) {
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printk("Failed to ioremap flash\n");
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return -EIO;
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}
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simple_map_init(&ocotea_small_map);
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flash = do_map_probe("map_rom", &ocotea_small_map);
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if (flash) {
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flash->owner = THIS_MODULE;
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add_mtd_partitions(flash, ocotea_small_partitions,
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ARRAY_SIZE(ocotea_small_partitions));
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} else {
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printk("map probe failed for flash\n");
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return -ENXIO;
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}
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ocotea_large_map.phys = large_flash_base;
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ocotea_large_map.virt = ioremap64(large_flash_base,
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ocotea_large_map.size);
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if (!ocotea_large_map.virt) {
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printk("Failed to ioremap flash\n");
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return -EIO;
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}
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simple_map_init(&ocotea_large_map);
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flash = do_map_probe("cfi_probe", &ocotea_large_map);
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if (flash) {
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flash->owner = THIS_MODULE;
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add_mtd_partitions(flash, ocotea_large_partitions,
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ARRAY_SIZE(ocotea_large_partitions));
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} else {
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printk("map probe failed for flash\n");
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return -ENXIO;
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}
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return 0;
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}
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static void __exit cleanup_ocotea(void)
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{
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if (flash) {
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del_mtd_partitions(flash);
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map_destroy(flash);
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}
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if (ocotea_small_map.virt) {
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iounmap((void *)ocotea_small_map.virt);
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ocotea_small_map.virt = 0;
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}
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if (ocotea_large_map.virt) {
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iounmap((void *)ocotea_large_map.virt);
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ocotea_large_map.virt = 0;
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}
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}
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module_init(init_ocotea);
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module_exit(cleanup_ocotea);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
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MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards");
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