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authorHauke Mehrtens <hauke@hauke-m.de>2009-05-27 18:28:07 +0000
committerHauke Mehrtens <hauke@hauke-m.de>2009-05-27 18:28:07 +0000
commit4d9d62eadac086d1e1482473bf292c06a3f4ff6e (patch)
tree4b5e85e4aaebce96869a14714ed47648c80c6979 /target/linux/amazon/files/drivers
parentf2fa4d7035a3aeedf7526438cbc4a5a9c0ba4d98 (diff)
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Detect 16MB flash chips
SVN-Revision: 16120
Diffstat (limited to 'target/linux/amazon/files/drivers')
-rw-r--r--target/linux/amazon/files/drivers/mtd/maps/amazon.c40
1 files changed, 32 insertions, 8 deletions
diff --git a/target/linux/amazon/files/drivers/mtd/maps/amazon.c b/target/linux/amazon/files/drivers/mtd/maps/amazon.c
index 3e7dc4f..8c31141 100644
--- a/target/linux/amazon/files/drivers/mtd/maps/amazon.c
+++ b/target/linux/amazon/files/drivers/mtd/maps/amazon.c
@@ -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;
}