164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
/*
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* Mapping for Ebony 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 <asm/io.h>
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#include <asm/ibm44x.h>
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#include <platforms/4xx/ebony.h>
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static struct mtd_info *flash;
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static struct map_info ebony_small_map = {
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.name = "Ebony small flash",
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.size = EBONY_SMALL_FLASH_SIZE,
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.bankwidth = 1,
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};
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static struct map_info ebony_large_map = {
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.name = "Ebony large flash",
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.size = EBONY_LARGE_FLASH_SIZE,
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.bankwidth = 1,
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};
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static struct mtd_partition ebony_small_partitions[] = {
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{
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.name = "OpenBIOS",
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.offset = 0x0,
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.size = 0x80000,
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}
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};
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static struct mtd_partition ebony_large_partitions[] = {
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{
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.name = "fs",
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.offset = 0,
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.size = 0x380000,
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},
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{
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.name = "firmware",
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.offset = 0x380000,
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.size = 0x80000,
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}
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};
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int __init init_ebony(void)
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{
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u8 fpga0_reg;
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u8 __iomem *fpga0_adr;
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unsigned long long small_flash_base, large_flash_base;
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fpga0_adr = ioremap64(EBONY_FPGA_ADDR, 16);
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if (!fpga0_adr)
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return -ENOMEM;
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fpga0_reg = readb(fpga0_adr);
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iounmap(fpga0_adr);
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if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) &&
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!EBONY_FLASH_SEL(fpga0_reg))
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small_flash_base = EBONY_SMALL_FLASH_HIGH2;
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else if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) &&
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EBONY_FLASH_SEL(fpga0_reg))
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small_flash_base = EBONY_SMALL_FLASH_HIGH1;
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else if (!EBONY_BOOT_SMALL_FLASH(fpga0_reg) &&
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!EBONY_FLASH_SEL(fpga0_reg))
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small_flash_base = EBONY_SMALL_FLASH_LOW2;
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else
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small_flash_base = EBONY_SMALL_FLASH_LOW1;
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if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) &&
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!EBONY_ONBRD_FLASH_EN(fpga0_reg))
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large_flash_base = EBONY_LARGE_FLASH_LOW;
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else
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large_flash_base = EBONY_LARGE_FLASH_HIGH;
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ebony_small_map.phys = small_flash_base;
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ebony_small_map.virt = ioremap64(small_flash_base,
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ebony_small_map.size);
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if (!ebony_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(&ebony_small_map);
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flash = do_map_probe("jedec_probe", &ebony_small_map);
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if (flash) {
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flash->owner = THIS_MODULE;
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add_mtd_partitions(flash, ebony_small_partitions,
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ARRAY_SIZE(ebony_small_partitions));
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} else {
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printk("map probe failed for flash\n");
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iounmap(ebony_small_map.virt);
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return -ENXIO;
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}
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ebony_large_map.phys = large_flash_base;
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ebony_large_map.virt = ioremap64(large_flash_base,
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ebony_large_map.size);
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if (!ebony_large_map.virt) {
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printk("Failed to ioremap flash\n");
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iounmap(ebony_small_map.virt);
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return -EIO;
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}
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simple_map_init(&ebony_large_map);
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flash = do_map_probe("jedec_probe", &ebony_large_map);
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if (flash) {
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flash->owner = THIS_MODULE;
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add_mtd_partitions(flash, ebony_large_partitions,
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ARRAY_SIZE(ebony_large_partitions));
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} else {
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printk("map probe failed for flash\n");
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iounmap(ebony_small_map.virt);
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iounmap(ebony_large_map.virt);
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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_ebony(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 (ebony_small_map.virt) {
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iounmap(ebony_small_map.virt);
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ebony_small_map.virt = NULL;
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}
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if (ebony_large_map.virt) {
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iounmap(ebony_large_map.virt);
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ebony_large_map.virt = NULL;
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}
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}
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module_init(init_ebony);
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module_exit(cleanup_ebony);
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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 440GP Ebony boards");
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