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[amazon] Detect 16MB flash chips

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16120 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hauke 2009-05-27 18:28:07 +00:00
parent e7b7d5aed1
commit 5d27cef032
1 changed files with 32 additions and 8 deletions
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40
target/linux/amazon/files/drivers/mtd/maps/amazon.c
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@ -41,7 +41,7 @@
static struct map_info amazon_map = {
.name = "AMAZON_FLASH",
.bankwidth = 2,
.size = 0x400000,
.size = 0x1000000,
};
static map_word amazon_read16(struct map_info * map, unsigned long ofs)
@ -107,18 +107,24 @@ unsigned long flash_start = 0x13000000;
unsigned long flash_size = 0x800000;
unsigned long uImage_size = 0x10000d;
int find_uImage_size(unsigned long start_offset){
int find_uImage_size(unsigned long start_offset)
{
unsigned long magic;
unsigned long temp;
printk("trying to find uImage and its size\n");
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("kernel size is %d \n", temp + 0x40);
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;
@ -146,10 +152,28 @@ int __init init_amazon_mtd(void)
mymtd->owner = THIS_MODULE;
parts = &amazon_partitions[0];
amazon_partitions[2].offset = UBOOT_SIZE + find_uImage_size(amazon_partitions[1].offset);
amazon_partitions[1].size = mymtd->size - amazon_partitions[1].offset - (2 * mymtd->erasesize);
amazon_partitions[2].size = mymtd->size - amazon_partitions[2].offset - (2 * mymtd->erasesize);
/* 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;
}