/* * $Id: ebony.c,v 1.16 2005/11/07 11:14:26 gleixner Exp $ * * Mapping for Ebony user flash * * Matt Porter <mporter@kernel.crashing.org> * * Copyright 2002-2004 MontaVista Software Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/module.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/mtd/mtd.h> #include <linux/mtd/map.h> #include <linux/mtd/partitions.h> #include <linux/config.h> #include <asm/io.h> #include <asm/ibm44x.h> #include <platforms/4xx/ebony.h> static struct mtd_info *flash; static struct map_info ebony_small_map = { .name = "Ebony small flash", .size = EBONY_SMALL_FLASH_SIZE, .bankwidth = 1, }; static struct map_info ebony_large_map = { .name = "Ebony large flash", .size = EBONY_LARGE_FLASH_SIZE, .bankwidth = 1, }; static struct mtd_partition ebony_small_partitions[] = { { .name = "OpenBIOS", .offset = 0x0, .size = 0x80000, } }; static struct mtd_partition ebony_large_partitions[] = { { .name = "fs", .offset = 0, .size = 0x380000, }, { .name = "firmware", .offset = 0x380000, .size = 0x80000, } }; int __init init_ebony(void) { u8 fpga0_reg; u8 __iomem *fpga0_adr; unsigned long long small_flash_base, large_flash_base; fpga0_adr = ioremap64(EBONY_FPGA_ADDR, 16); if (!fpga0_adr) return -ENOMEM; fpga0_reg = readb(fpga0_adr); iounmap(fpga0_adr); if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && !EBONY_FLASH_SEL(fpga0_reg)) small_flash_base = EBONY_SMALL_FLASH_HIGH2; else if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && EBONY_FLASH_SEL(fpga0_reg)) small_flash_base = EBONY_SMALL_FLASH_HIGH1; else if (!EBONY_BOOT_SMALL_FLASH(fpga0_reg) && !EBONY_FLASH_SEL(fpga0_reg)) small_flash_base = EBONY_SMALL_FLASH_LOW2; else small_flash_base = EBONY_SMALL_FLASH_LOW1; if (EBONY_BOOT_SMALL_FLASH(fpga0_reg) && !EBONY_ONBRD_FLASH_EN(fpga0_reg)) large_flash_base = EBONY_LARGE_FLASH_LOW; else large_flash_base = EBONY_LARGE_FLASH_HIGH; ebony_small_map.phys = small_flash_base; ebony_small_map.virt = ioremap64(small_flash_base, ebony_small_map.size); if (!ebony_small_map.virt) { printk("Failed to ioremap flash\n"); return -EIO; } simple_map_init(&ebony_small_map); flash = do_map_probe("jedec_probe", &ebony_small_map); if (flash) { flash->owner = THIS_MODULE; add_mtd_partitions(flash, ebony_small_partitions, ARRAY_SIZE(ebony_small_partitions)); } else { printk("map probe failed for flash\n"); return -ENXIO; } ebony_large_map.phys = large_flash_base; ebony_large_map.virt = ioremap64(large_flash_base, ebony_large_map.size); if (!ebony_large_map.virt) { printk("Failed to ioremap flash\n"); return -EIO; } simple_map_init(&ebony_large_map); flash = do_map_probe("jedec_probe", &ebony_large_map); if (flash) { flash->owner = THIS_MODULE; add_mtd_partitions(flash, ebony_large_partitions, ARRAY_SIZE(ebony_large_partitions)); } else { printk("map probe failed for flash\n"); return -ENXIO; } return 0; } static void __exit cleanup_ebony(void) { if (flash) { del_mtd_partitions(flash); map_destroy(flash); } if (ebony_small_map.virt) { iounmap(ebony_small_map.virt); ebony_small_map.virt = NULL; } if (ebony_large_map.virt) { iounmap(ebony_large_map.virt); ebony_large_map.virt = NULL; } } module_init(init_ebony); module_exit(cleanup_ebony); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>"); MODULE_DESCRIPTION("MTD map and partitions for IBM 440GP Ebony boards");