195 lines
4.3 KiB
C
195 lines
4.3 KiB
C
/*
|
|
* Driver for DANUBE flashmap
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Copyright (C) 2004 Liu Peng Infineon IFAP DC COM CPE
|
|
* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <asm/io.h>
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/map.h>
|
|
#include <linux/mtd/partitions.h>
|
|
#include <linux/mtd/cfi.h>
|
|
#include <asm/danube/danube.h>
|
|
#include <linux/magic.h>
|
|
|
|
static struct map_info
|
|
danube_map = {
|
|
.name = "DANUBE_FLASH",
|
|
.bankwidth = 2,
|
|
.size = 0x400000,
|
|
};
|
|
|
|
static map_word
|
|
danube_read16 (struct map_info * map, unsigned long adr)
|
|
{
|
|
map_word temp;
|
|
|
|
adr ^= 2;
|
|
temp.x[0] = *((__u16 *) (map->virt + adr));
|
|
|
|
return temp;
|
|
}
|
|
|
|
static void
|
|
danube_write16 (struct map_info *map, map_word d, unsigned long adr)
|
|
{
|
|
adr ^= 2;
|
|
*((__u16 *) (map->virt + adr)) = d.x[0];
|
|
}
|
|
|
|
void
|
|
danube_copy_from (struct map_info *map, void *to, unsigned long from, ssize_t len)
|
|
{
|
|
u8 *p;
|
|
u8 *to_8;
|
|
|
|
from = (unsigned long) (from + map->virt);
|
|
p = (u8 *) from;
|
|
to_8 = (u8 *) to;
|
|
while(len--){
|
|
*to_8++ = *p++;
|
|
}
|
|
}
|
|
|
|
void
|
|
danube_copy_to (struct map_info *map, unsigned long to, const void *from, ssize_t len)
|
|
{
|
|
u8 *p = (u8*) from;
|
|
u8 *to_8;
|
|
|
|
to += (unsigned long) map->virt;
|
|
to_8 = (u8*)to;
|
|
while(len--){
|
|
*p++ = *to_8++;
|
|
}
|
|
}
|
|
|
|
static struct mtd_partition
|
|
danube_partitions[4] = {
|
|
{
|
|
name:"U-Boot",
|
|
offset:0x00000000,
|
|
size:0x00020000,
|
|
},
|
|
{
|
|
name:"U-Boot-Env",
|
|
offset:0x00020000,
|
|
size:0x00010000,
|
|
},
|
|
{
|
|
name:"kernel",
|
|
offset:0x00030000,
|
|
size:0x0,
|
|
},
|
|
{
|
|
name:"rootfs",
|
|
offset:0x0,
|
|
size:0x0,
|
|
},
|
|
};
|
|
|
|
#define DANUBE_FLASH_START 0x10000000
|
|
#define DANUBE_FLASH_MAX 0x2000000
|
|
|
|
int
|
|
find_uImage_size (unsigned long start_offset){
|
|
unsigned long temp;
|
|
|
|
danube_copy_from(&danube_map, &temp, start_offset + 12, 4);
|
|
printk("kernel size is %ld \n", temp + 0x40);
|
|
return temp + 0x40;
|
|
}
|
|
|
|
int
|
|
detect_squashfs_partition (unsigned long start_offset){
|
|
unsigned long temp;
|
|
|
|
danube_copy_from(&danube_map, &temp, start_offset, 4);
|
|
|
|
return (temp == SQUASHFS_MAGIC);
|
|
}
|
|
|
|
int __init
|
|
init_danube_mtd (void)
|
|
{
|
|
struct mtd_info *danube_mtd = NULL;
|
|
struct mtd_partition *parts = NULL;
|
|
unsigned long uimage_size;
|
|
|
|
writel(0x1d7ff, DANUBE_EBU_BUSCON0);
|
|
|
|
danube_map.read = danube_read16;
|
|
danube_map.write = danube_write16;
|
|
danube_map.copy_from = danube_copy_from;
|
|
danube_map.copy_to = danube_copy_to;
|
|
|
|
danube_map.phys = DANUBE_FLASH_START;
|
|
danube_map.virt = ioremap_nocache(DANUBE_FLASH_START, DANUBE_FLASH_MAX);
|
|
danube_map.size = DANUBE_FLASH_MAX;
|
|
if (!danube_map.virt) {
|
|
printk(KERN_WARNING "Failed to ioremap!\n");
|
|
return -EIO;
|
|
}
|
|
|
|
danube_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &danube_map);
|
|
if (!danube_mtd) {
|
|
iounmap(danube_map.virt);
|
|
printk("probing failed\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
danube_mtd->owner = THIS_MODULE;
|
|
|
|
uimage_size = find_uImage_size(danube_partitions[2].offset);
|
|
|
|
if(detect_squashfs_partition(danube_partitions[2].offset + uimage_size)){
|
|
printk("Found a squashfs following the uImage\n");
|
|
} else {
|
|
uimage_size &= ~0xffff;
|
|
uimage_size += 0x10000;
|
|
}
|
|
|
|
danube_partitions[2].size = uimage_size;
|
|
danube_partitions[3].offset = danube_partitions[2].offset + danube_partitions[2].size;
|
|
danube_partitions[3].size = ((danube_mtd->size >> 20) * 1024 * 1024) - danube_partitions[3].offset;
|
|
|
|
parts = &danube_partitions[0];
|
|
add_mtd_partitions(danube_mtd, parts, 4);
|
|
|
|
printk("Added danube flash with %dMB\n", danube_mtd->size >> 20);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
__exit
|
|
cleanup_danube_mtd (void)
|
|
{
|
|
}
|
|
|
|
module_init (init_danube_mtd);
|
|
module_exit (cleanup_danube_mtd);
|
|
|
|
MODULE_LICENSE ("GPL");
|
|
MODULE_AUTHOR ("John Crispin <blogic@openwrt.org>");
|
|
MODULE_DESCRIPTION ("MTD map driver for DANUBE boards");
|