mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-05 05:49:42 +02:00
5d27cef032
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16120 3c298f89-4303-0410-b956-a3cf2f4a3e73
191 lines
5.1 KiB
C
191 lines
5.1 KiB
C
/*
|
|
* Handle mapping of the flash memory access routines
|
|
* on Amazon based devices.
|
|
*
|
|
* Copyright(C) 2004 peng.liu@infineon.com
|
|
*
|
|
* This code is GPLed
|
|
*
|
|
*/
|
|
// 000005:fchang 2005/6/2 Modified by Bingtao to double check if the EBU is enabled/disabled
|
|
// 506231:tc.chen 2005/06/23 increase firmware partition size form 192KB to 256KB
|
|
// 050701:linmars 2005/07/01 fix flash size wrong alignment after increase firmware partition
|
|
// 165001:henryhsu 2005/8/18 Remove the support for Intel flash because of 2.1 not enough rootfs partition size
|
|
// 165001:henryhsu 2005/9/7 Rolback to support INtel flash
|
|
// 509071:tc.chen 2005/09/07 Reduced flash writing time
|
|
// 511046:linmars 2005/11/04 change bootloader size from 128 into 64
|
|
// 511241:linmars 2005/11/24 merge TaiChen's IRM patch
|
|
|
|
// copyright 2005 infineon
|
|
|
|
// copyright 2007 john crispin <blogic@openwrt.org>
|
|
// copyright 2007 felix fietkau <nbd@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 <linux/mutex.h>
|
|
#include <asm/amazon/amazon.h>
|
|
|
|
#define AMAZON_PCI_ARB_CTL_ALT 0xb100205c
|
|
#define AMAZON_MTD_REG32( addr ) (*(volatile u32 *)(addr))
|
|
|
|
|
|
static struct map_info amazon_map = {
|
|
.name = "AMAZON_FLASH",
|
|
.bankwidth = 2,
|
|
.size = 0x1000000,
|
|
};
|
|
|
|
static map_word amazon_read16(struct map_info * map, unsigned long ofs)
|
|
{
|
|
map_word temp;
|
|
ofs ^= 2;
|
|
temp.x[0] = *((__u16 *) (map->virt + ofs));
|
|
return temp;
|
|
}
|
|
|
|
static void amazon_write16(struct map_info *map, map_word d, unsigned long adr)
|
|
{
|
|
adr ^= 2;
|
|
*((__u16 *) (map->virt + adr)) = d.x[0];
|
|
}
|
|
|
|
void amazon_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
|
|
{
|
|
u8 *p;
|
|
u8 *to_8;
|
|
ssize_t l = len;
|
|
from = (unsigned long) (from + map->virt);
|
|
p = (u8 *) from;
|
|
to_8 = (u8 *) to;
|
|
while(len--){
|
|
*to_8++ = *p++;
|
|
}
|
|
}
|
|
|
|
void amazon_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++;
|
|
}
|
|
}
|
|
|
|
#define UBOOT_SIZE 0x40000
|
|
|
|
static struct mtd_partition amazon_partitions[3] = {
|
|
{
|
|
name:"U-Boot", /* U-Boot firmware */
|
|
offset:0x00000000,
|
|
size:UBOOT_SIZE , /* 128k */
|
|
},
|
|
{
|
|
name:"kernel", /* firmware */
|
|
offset:UBOOT_SIZE,
|
|
size:0x00100000, /* 192K */
|
|
},
|
|
{
|
|
name:"rootfs", /* default partition */
|
|
offset:0x00200000,
|
|
size:0x00200000,
|
|
},
|
|
};
|
|
|
|
|
|
unsigned long flash_start = 0x13000000;
|
|
unsigned long flash_size = 0x800000;
|
|
unsigned long uImage_size = 0x10000d;
|
|
|
|
int find_uImage_size(unsigned long start_offset)
|
|
{
|
|
unsigned long magic;
|
|
unsigned long temp;
|
|
amazon_copy_from(&amazon_map, &magic, start_offset, 4);
|
|
if (!(ntohl(magic) == 0x27051956)) {
|
|
printk(KERN_INFO "amazon_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", ntohl(magic), start_offset);
|
|
return 0;
|
|
}
|
|
amazon_copy_from(&amazon_map, &temp, start_offset + 12, 4);
|
|
printk(KERN_INFO "amazon_mtd: kernel size is %ld \n", temp + 0x40);
|
|
return temp + 0x40;
|
|
}
|
|
|
|
int __init init_amazon_mtd(void)
|
|
{
|
|
int ret = 0;
|
|
unsigned long uimage_size;
|
|
struct mtd_info *mymtd = NULL;
|
|
struct mtd_partition *parts = NULL;
|
|
|
|
*AMAZON_EBU_BUSCON0 = 0x1d7ff;
|
|
|
|
amazon_map.read = amazon_read16;
|
|
amazon_map.write = amazon_write16;
|
|
amazon_map.copy_from = amazon_copy_from;
|
|
amazon_map.copy_to = amazon_copy_to;
|
|
|
|
amazon_map.phys = flash_start;
|
|
amazon_map.virt = ioremap_nocache(flash_start, flash_size);
|
|
|
|
if (!amazon_map.virt) {
|
|
printk(KERN_WARNING "Failed to ioremap!\n");
|
|
return -EIO;
|
|
}
|
|
|
|
mymtd = (struct mtd_info *) do_map_probe("cfi_probe", &amazon_map);
|
|
if (!mymtd) {
|
|
iounmap(amazon_map.virt);
|
|
printk("probing failed\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
mymtd->owner = THIS_MODULE;
|
|
parts = &amazon_partitions[0];
|
|
|
|
/* Some Samsung devices are containing a 16 MB flash chip with a bigger U-Boot partition. */
|
|
if(mymtd->size == 0x01000000 && mymtd->erasesize == 0x00020000) {
|
|
printk(KERN_INFO "amazon_mtd: Found big flash chip!\n");
|
|
amazon_partitions[0].size = 0x60000;
|
|
amazon_partitions[1].offset = 0x60000;
|
|
uimage_size = find_uImage_size(amazon_partitions[1].offset);
|
|
amazon_partitions[1].size = uimage_size;
|
|
amazon_partitions[2].offset = 0x60000 + uimage_size;
|
|
amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - mymtd->erasesize;
|
|
} else {
|
|
printk(KERN_INFO "amazon_mtd: Found small flash chip!\n");
|
|
uimage_size = find_uImage_size(amazon_partitions[1].offset);
|
|
amazon_partitions[1].size = uimage_size;
|
|
amazon_partitions[2].offset = UBOOT_SIZE + uimage_size;
|
|
amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - (2 * mymtd->erasesize);
|
|
}
|
|
|
|
add_mtd_partitions(mymtd, parts, 3);
|
|
|
|
printk(KERN_INFO "amazon_mtd: added %s flash with %dMB\n",
|
|
amazon_map.name, mymtd->size >> 20);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit cleanup_amazon_mtd(void)
|
|
{
|
|
/* FIXME! */
|
|
}
|
|
|
|
module_init(init_amazon_mtd);
|
|
module_exit(cleanup_amazon_mtd);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("john crispin blogic@openwrt.org");
|
|
MODULE_DESCRIPTION("MTD map driver for AMAZON boards");
|