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[adm5120] prepare trxsplit to support sysupgrade

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9085 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
juhosg
2007-10-01 09:51:32 +00:00
parent 6f924b0772
commit f6225af7d0
5 changed files with 99 additions and 52 deletions
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2
target/linux/adm5120/files/arch/mips/adm5120/Makefile
View File

@@ -9,5 +9,3 @@ obj-y += gpio.o
obj-y += platform.o
obj-y += reset.o
obj-y += time.o
obj-y += trxsplit.o

117
target/linux/adm5120/files/arch/mips/adm5120/trxsplit.c → target/linux/adm5120/files/drivers/mtd/trxsplit.c
View File

@@ -59,7 +59,9 @@ static int trx_nr_parts = 0;
static struct mtd_partition trx_parts[TRX_MAX_OFFSET];
static struct trx_header trx_hdr;
static int __init trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
static int trxsplit_refresh_partitions(struct mtd_info *mtd);
static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
{
size_t retlen;
int err;
@@ -98,18 +100,40 @@ err_out:
return -1;
}
static int __init trxsplit_create_partitions(void)
static void trxsplit_findtrx(struct mtd_info *mtd)
{
unsigned long offset;
unsigned long blocklen;
int err;
blocklen = mtd->erasesize;
if (blocklen < BLOCK_LEN_MIN)
blocklen = BLOCK_LEN_MIN;
printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
err = 0;
for (offset=0; offset < mtd->size; offset+=blocklen) {
err = trxsplit_checktrx(mtd, offset);
if (err == 0)
break;
}
if (err)
return;
printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
trx_mtd = mtd;
trx_offset = offset;
}
static void trxsplit_create_partitions(struct mtd_info *mtd)
{
struct mtd_partition *part = trx_parts;
int ret = 0;
int err;
int i;
if (trx_mtd == NULL)
goto out;
printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
for (i=0; i<TRX_MAX_OFFSET;i++) {
part = &trx_parts[i];
if (trx_hdr.offsets[i] == 0)
@@ -121,7 +145,7 @@ static int __init trxsplit_create_partitions(void)
for (i=0; i<trx_nr_parts-1; i++) {
trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset;
}
trx_parts[i].size = trx_mtd->size - trx_parts[i].offset;
trx_parts[i].size = mtd->size - trx_parts[i].offset;
i=0;
part = &trx_parts[i];
@@ -137,46 +161,38 @@ static int __init trxsplit_create_partitions(void)
part = &trx_parts[i];
part->name = "rootfs";
ret = add_mtd_partitions(trx_mtd, trx_parts, trx_nr_parts);
if (ret) {
printk(KERN_ALERT PFX "creating TRX partitions failed\n");
err = add_mtd_partitions(mtd, trx_parts, trx_nr_parts);
if (err) {
printk(KERN_ALERT PFX "adding TRX partitions failed\n");
return;
}
out:
return ret;
mtd->refresh_device = trxsplit_refresh_partitions;
}
static int trxsplit_refresh_partitions(struct mtd_info *mtd)
{
printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n",
mtd->name, MTD_BLOCK_MAJOR, mtd->index);
/* remove old partitions */
del_mtd_partitions(mtd);
trxsplit_findtrx(mtd);
if (!trx_mtd)
goto err;
trxsplit_create_partitions(trx_mtd);
return 1;
err:
return 0;
}
static void __init trxsplit_add_mtd(struct mtd_info *mtd)
{
unsigned long offset;
unsigned long blocklen;
int err;
if (trx_mtd)
return;
blocklen = mtd->erasesize;
if (blocklen < BLOCK_LEN_MIN)
blocklen = BLOCK_LEN_MIN;
printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
err = 0;
for (offset=0; offset < mtd->size; offset+=blocklen) {
err = trxsplit_checktrx(mtd, offset);
if (err == 0)
break;
}
if (err) {
printk(KERN_ALERT PFX "no TRX header found\n");
return;
}
printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset);
trx_mtd = mtd;
trx_offset = offset;
if (!trx_mtd)
trxsplit_findtrx(mtd);
}
static void __init trxsplit_remove_mtd(struct mtd_info *mtd)
@@ -189,7 +205,7 @@ static struct mtd_notifier trxsplit_notifier __initdata = {
.remove = trxsplit_remove_mtd,
};
static void __init trxsplit_find_trx(void)
static void __init trxsplit_scan(void)
{
register_mtd_user(&trxsplit_notifier);
unregister_mtd_user(&trxsplit_notifier);
@@ -197,12 +213,15 @@ static void __init trxsplit_find_trx(void)
static int __init trxsplit_init(void)
{
int ret;
trxsplit_scan();
trxsplit_find_trx();
if (trx_mtd) {
printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
trxsplit_create_partitions(trx_mtd);
}
ret = trxsplit_create_partitions();
return ret;
return 0;
}
late_initcall(trxsplit_init);