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/*
* $Id: redwood.c,v 1.11 2005/11/07 11:14:28 gleixner Exp $
*
* drivers/mtd/maps/redwood.c
*
* FLASH map for the IBM Redwood 4/5/6 boards.
*
* Author: MontaVista Software, Inc. <source@mvista.com>
*
* 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/config.h>
#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 <asm/io.h>
#if !defined (CONFIG_REDWOOD_6)
#define WINDOW_ADDR 0xffc00000
#define WINDOW_SIZE 0x00400000
#define RW_PART0_OF 0
#define RW_PART0_SZ 0x10000
#define RW_PART1_OF RW_PART0_SZ
#define RW_PART1_SZ 0x200000 - 0x10000
#define RW_PART2_OF 0x200000
#define RW_PART2_SZ 0x10000
#define RW_PART3_OF 0x210000
#define RW_PART3_SZ 0x200000 - (0x10000 + 0x20000)
#define RW_PART4_OF 0x3e0000
#define RW_PART4_SZ 0x20000
static struct mtd_partition redwood_flash_partitions[] = {
{
.name = "Redwood OpenBIOS Vital Product Data",
.offset = RW_PART0_OF,
.size = RW_PART0_SZ,
.mask_flags = MTD_WRITEABLE /* force read-only */
},
{
.name = "Redwood kernel",
.offset = RW_PART1_OF,
.size = RW_PART1_SZ
},
{
.name = "Redwood OpenBIOS non-volatile storage",
.offset = RW_PART2_OF,
.size = RW_PART2_SZ,
.mask_flags = MTD_WRITEABLE /* force read-only */
},
{
.name = "Redwood filesystem",
.offset = RW_PART3_OF,
.size = RW_PART3_SZ
},
{
.name = "Redwood OpenBIOS",
.offset = RW_PART4_OF,
.size = RW_PART4_SZ,
.mask_flags = MTD_WRITEABLE /* force read-only */
}
};
#else /* CONFIG_REDWOOD_6 */
/* FIXME: the window is bigger - armin */
#define WINDOW_ADDR 0xff800000
#define WINDOW_SIZE 0x00800000
#define RW_PART0_OF 0
#define RW_PART0_SZ 0x400000 /* 4 MiB data */
#define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ
#define RW_PART1_SZ 0x10000 /* 64K VPD */
#define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ
#define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000)
#define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ
#define RW_PART3_SZ 0x20000
static struct mtd_partition redwood_flash_partitions[] = {
{
.name = "Redwood filesystem",
.offset = RW_PART0_OF,
.size = RW_PART0_SZ
},
{
.name = "Redwood OpenBIOS Vital Product Data",
.offset = RW_PART1_OF,
.size = RW_PART1_SZ,
.mask_flags = MTD_WRITEABLE /* force read-only */
},
{
.name = "Redwood kernel",
.offset = RW_PART2_OF,
.size = RW_PART2_SZ
},
{
.name = "Redwood OpenBIOS",
.offset = RW_PART3_OF,
.size = RW_PART3_SZ,
.mask_flags = MTD_WRITEABLE /* force read-only */
}
};
#endif /* CONFIG_REDWOOD_6 */
struct map_info redwood_flash_map = {
.name = "IBM Redwood",
.size = WINDOW_SIZE,
.bankwidth = 2,
.phys = WINDOW_ADDR,
};
#define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
static struct mtd_info *redwood_mtd;
int __init init_redwood_flash(void)
{
printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
WINDOW_SIZE, WINDOW_ADDR);
redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!redwood_flash_map.virt) {
printk("init_redwood_flash: failed to ioremap\n");
return -EIO;
}
simple_map_init(&redwood_flash_map);
redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
if (redwood_mtd) {
redwood_mtd->owner = THIS_MODULE;
return add_mtd_partitions(redwood_mtd,
redwood_flash_partitions,
NUM_REDWOOD_FLASH_PARTITIONS);
}
return -ENXIO;
}
static void __exit cleanup_redwood_flash(void)
{
if (redwood_mtd) {
del_mtd_partitions(redwood_mtd);
/* moved iounmap after map_destroy - armin */
map_destroy(redwood_mtd);
iounmap((void *)redwood_flash_map.virt);
}
}
module_init(init_redwood_flash);
module_exit(cleanup_redwood_flash);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");
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