25f0c659fe
ioremap must be balanced by an iounmap and failing to do so can result in a memory leak. Tested (compilation only) with: - allmodconfig - Modifying drivers/mtd/maps/Kconfig and drivers/mtd/nand/Kconfig to make sure that the changed file is compiling without warning Signed-off-by: Amol Lad <amol@verismonetworks.com> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
155 lines
3.4 KiB
C
155 lines
3.4 KiB
C
/*
|
|
* Mapping for Ocotea 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 <asm/io.h>
|
|
#include <asm/ibm44x.h>
|
|
#include <platforms/4xx/ocotea.h>
|
|
|
|
static struct mtd_info *flash;
|
|
|
|
static struct map_info ocotea_small_map = {
|
|
.name = "Ocotea small flash",
|
|
.size = OCOTEA_SMALL_FLASH_SIZE,
|
|
.buswidth = 1,
|
|
};
|
|
|
|
static struct map_info ocotea_large_map = {
|
|
.name = "Ocotea large flash",
|
|
.size = OCOTEA_LARGE_FLASH_SIZE,
|
|
.buswidth = 1,
|
|
};
|
|
|
|
static struct mtd_partition ocotea_small_partitions[] = {
|
|
{
|
|
.name = "pibs",
|
|
.offset = 0x0,
|
|
.size = 0x100000,
|
|
}
|
|
};
|
|
|
|
static struct mtd_partition ocotea_large_partitions[] = {
|
|
{
|
|
.name = "fs",
|
|
.offset = 0,
|
|
.size = 0x300000,
|
|
},
|
|
{
|
|
.name = "firmware",
|
|
.offset = 0x300000,
|
|
.size = 0x100000,
|
|
}
|
|
};
|
|
|
|
int __init init_ocotea(void)
|
|
{
|
|
u8 fpga0_reg;
|
|
u8 *fpga0_adr;
|
|
unsigned long long small_flash_base, large_flash_base;
|
|
|
|
fpga0_adr = ioremap64(OCOTEA_FPGA_ADDR, 16);
|
|
if (!fpga0_adr)
|
|
return -ENOMEM;
|
|
|
|
fpga0_reg = readb((unsigned long)fpga0_adr);
|
|
iounmap(fpga0_adr);
|
|
|
|
if (OCOTEA_BOOT_LARGE_FLASH(fpga0_reg)) {
|
|
small_flash_base = OCOTEA_SMALL_FLASH_HIGH;
|
|
large_flash_base = OCOTEA_LARGE_FLASH_LOW;
|
|
}
|
|
else {
|
|
small_flash_base = OCOTEA_SMALL_FLASH_LOW;
|
|
large_flash_base = OCOTEA_LARGE_FLASH_HIGH;
|
|
}
|
|
|
|
ocotea_small_map.phys = small_flash_base;
|
|
ocotea_small_map.virt = ioremap64(small_flash_base,
|
|
ocotea_small_map.size);
|
|
|
|
if (!ocotea_small_map.virt) {
|
|
printk("Failed to ioremap flash\n");
|
|
return -EIO;
|
|
}
|
|
|
|
simple_map_init(&ocotea_small_map);
|
|
|
|
flash = do_map_probe("map_rom", &ocotea_small_map);
|
|
if (flash) {
|
|
flash->owner = THIS_MODULE;
|
|
add_mtd_partitions(flash, ocotea_small_partitions,
|
|
ARRAY_SIZE(ocotea_small_partitions));
|
|
} else {
|
|
printk("map probe failed for flash\n");
|
|
iounmap(ocotea_small_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
|
|
ocotea_large_map.phys = large_flash_base;
|
|
ocotea_large_map.virt = ioremap64(large_flash_base,
|
|
ocotea_large_map.size);
|
|
|
|
if (!ocotea_large_map.virt) {
|
|
printk("Failed to ioremap flash\n");
|
|
iounmap(ocotea_small_map.virt);
|
|
return -EIO;
|
|
}
|
|
|
|
simple_map_init(&ocotea_large_map);
|
|
|
|
flash = do_map_probe("cfi_probe", &ocotea_large_map);
|
|
if (flash) {
|
|
flash->owner = THIS_MODULE;
|
|
add_mtd_partitions(flash, ocotea_large_partitions,
|
|
ARRAY_SIZE(ocotea_large_partitions));
|
|
} else {
|
|
printk("map probe failed for flash\n");
|
|
iounmap(ocotea_small_map.virt);
|
|
iounmap(ocotea_large_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit cleanup_ocotea(void)
|
|
{
|
|
if (flash) {
|
|
del_mtd_partitions(flash);
|
|
map_destroy(flash);
|
|
}
|
|
|
|
if (ocotea_small_map.virt) {
|
|
iounmap((void *)ocotea_small_map.virt);
|
|
ocotea_small_map.virt = 0;
|
|
}
|
|
|
|
if (ocotea_large_map.virt) {
|
|
iounmap((void *)ocotea_large_map.virt);
|
|
ocotea_large_map.virt = 0;
|
|
}
|
|
}
|
|
|
|
module_init(init_ocotea);
|
|
module_exit(cleanup_ocotea);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Matt Porter <mporter@kernel.crashing.org>");
|
|
MODULE_DESCRIPTION("MTD map and partitions for IBM 440GX Ocotea boards");
|