101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/* Handle mapping of the flash on the ASB2303 board
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#define ASB2303_PROM_ADDR 0xA0000000 /* Boot PROM */
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#define ASB2303_PROM_SIZE (2 * 1024 * 1024)
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#define ASB2303_FLASH_ADDR 0xA4000000 /* System Flash */
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#define ASB2303_FLASH_SIZE (32 * 1024 * 1024)
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#define ASB2303_CONFIG_ADDR 0xA6000000 /* System Config EEPROM */
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#define ASB2303_CONFIG_SIZE (8 * 1024)
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/*
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* default MTD partition table for both main flash devices, expected to be
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* overridden by RedBoot
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*/
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static struct mtd_partition asb2303_partitions[] = {
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{
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.name = "Bootloader",
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.size = 0x00040000,
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.offset = 0,
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.mask_flags = MTD_CAP_ROM /* force read-only */
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}, {
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.name = "Kernel",
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.size = 0x00400000,
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.offset = 0x00040000,
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}, {
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.name = "Filesystem",
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.size = MTDPART_SIZ_FULL,
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.offset = 0x00440000
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}
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};
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/*
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* the ASB2303 Boot PROM definition
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*/
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static struct physmap_flash_data asb2303_bootprom_data = {
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.width = 2,
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.nr_parts = 1,
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.parts = asb2303_partitions,
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};
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static struct resource asb2303_bootprom_resource = {
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.start = ASB2303_PROM_ADDR,
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.end = ASB2303_PROM_ADDR + ASB2303_PROM_SIZE,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device asb2303_bootprom = {
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.name = "physmap-flash",
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.id = 0,
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.dev.platform_data = &asb2303_bootprom_data,
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.num_resources = 1,
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.resource = &asb2303_bootprom_resource,
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};
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/*
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* the ASB2303 System Flash definition
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*/
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static struct physmap_flash_data asb2303_sysflash_data = {
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.width = 4,
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.nr_parts = 1,
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.parts = asb2303_partitions,
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};
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static struct resource asb2303_sysflash_resource = {
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.start = ASB2303_FLASH_ADDR,
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.end = ASB2303_FLASH_ADDR + ASB2303_FLASH_SIZE,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device asb2303_sysflash = {
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.name = "physmap-flash",
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.id = 1,
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.dev.platform_data = &asb2303_sysflash_data,
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.num_resources = 1,
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.resource = &asb2303_sysflash_resource,
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};
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/*
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* register the ASB2303 flashes
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*/
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static int __init asb2303_mtd_init(void)
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{
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platform_device_register(&asb2303_bootprom);
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platform_device_register(&asb2303_sysflash);
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return 0;
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}
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module_init(asb2303_mtd_init);
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