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update MyLoader partition parser, add support of named partitions

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SVN-Revision: 13255
This commit is contained in:
Gabor Juhos 2008-11-17 09:47:03 +00:00
parent 300d8bea55
commit 2aaf71e42f
1 changed files with 57 additions and 43 deletions
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100
target/linux/adm5120/files/drivers/mtd/myloader.c
View file

@ -17,23 +17,24 @@
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/vmalloc.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/byteorder/generic.h>
#include <linux/myloader.h>
#include <prom/myloader.h>
#define NAME_LEN_MAX 20
#define NAME_MYLOADER "MyLoader"
#define NAME_PARTITION_TABLE "Partition Table"
#define BLOCK_LEN_MIN 0x10000
#define PART_NAME_LEN 32
int parse_myloader_partitions(struct mtd_info *master,
struct part_data {
struct mylo_partition_table tab;
char names[MYLO_MAX_PARTITIONS][PART_NAME_LEN];
};
int myloader_parse_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long origin)
{
struct part_data *buf;
struct mylo_partition_table *tab;
struct mylo_partition *part;
struct mtd_partition *mtd_parts;
@ -45,33 +46,42 @@ int parse_myloader_partitions(struct mtd_info *master,
unsigned long offset;
unsigned long blocklen;
tab = vmalloc(sizeof(*tab));
if (!tab) {
buf = vmalloc(sizeof(*buf));
if (!buf) {
return -ENOMEM;
goto out;
}
tab = &buf->tab;
blocklen = master->erasesize;
if (blocklen < BLOCK_LEN_MIN)
blocklen = BLOCK_LEN_MIN;
/* Partition Table is always located on the second erase block */
offset = blocklen;
printk(KERN_NOTICE "%s: searching for MyLoader partition table at "
"offset 0x%lx\n", master->name, offset);
ret = master->read(master, offset, sizeof(*tab), &retlen, (void *)tab);
if (ret)
goto out;
/* Find the partition table */
for (i = 0; i < 4; i++, offset += blocklen) {
printk(KERN_DEBUG "%s: searching for MyLoader partition table"
" at offset 0x%lx\n", master->name, offset);
ret = master->read(master, offset, sizeof(*buf), &retlen,
(void *)buf);
if (ret)
goto out_free_buf;
if (retlen != sizeof(*buf)) {
ret = -EIO;
goto out_free_buf;
}
/* Check for Partition Table magic number */
if (tab->magic == le32_to_cpu(MYLO_MAGIC_PARTITIONS))
break;
if (retlen != sizeof(*tab)) {
ret = -EIO;
goto out_free_buf;
}
/* Check for Partition Table magic number */
if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) {
printk(KERN_NOTICE "%s: no MyLoader partition table found\n",
printk(KERN_DEBUG "%s: no MyLoader partition table found\n",
master->name);
ret = 0;
goto out_free_buf;
@ -91,7 +101,7 @@ int parse_myloader_partitions(struct mtd_info *master,
}
mtd_parts = kzalloc((num_parts * sizeof(*mtd_part) +
num_parts * NAME_LEN_MAX), GFP_KERNEL);
num_parts * PART_NAME_LEN), GFP_KERNEL);
if (!mtd_parts) {
ret = -ENOMEM;
@ -101,21 +111,21 @@ int parse_myloader_partitions(struct mtd_info *master,
mtd_part = mtd_parts;
names = (char *)&mtd_parts[num_parts];
strncpy(names, NAME_MYLOADER, NAME_LEN_MAX-1);
strncpy(names, "myloader", PART_NAME_LEN);
mtd_part->name = names;
mtd_part->offset = 0;
mtd_part->size = blocklen;
mtd_part->size = offset;
mtd_part->mask_flags = MTD_WRITEABLE;
mtd_part++;
names += NAME_LEN_MAX;
names += PART_NAME_LEN;
strncpy(names, NAME_PARTITION_TABLE, NAME_LEN_MAX-1);
strncpy(names, "partition_table", PART_NAME_LEN);
mtd_part->name = names;
mtd_part->offset = blocklen;
mtd_part->offset = offset;
mtd_part->size = blocklen;
mtd_part->mask_flags = MTD_WRITEABLE;
mtd_part++;
names += NAME_LEN_MAX;
names += PART_NAME_LEN;
for (i = 0; i < MYLO_MAX_PARTITIONS; i++) {
part = &tab->partitions[i];
@ -123,41 +133,45 @@ int parse_myloader_partitions(struct mtd_info *master,
if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE)
continue;
sprintf(names, "partition%d", i);
if (buf->names[i][0])
strncpy(names, buf->names[i], PART_NAME_LEN);
else
snprintf(names, PART_NAME_LEN, "partition%d", i);
mtd_part->offset = le32_to_cpu(part->addr);
mtd_part->size = le32_to_cpu(part->size);
mtd_part->name = names;
mtd_part++;
names += NAME_LEN_MAX;
names += PART_NAME_LEN;
}
*pparts = mtd_parts;
ret = num_parts;
out_free_buf:
vfree(tab);
out:
out_free_buf:
vfree(buf);
out:
return ret;
}
static struct mtd_part_parser mylo_mtd_parser = {
.owner = THIS_MODULE,
.parse_fn = parse_myloader_partitions,
.name = NAME_MYLOADER,
static struct mtd_part_parser myloader_mtd_parser = {
.owner = THIS_MODULE,
.parse_fn = myloader_parse_partitions,
.name = "MyLoader",
};
static int __init mylo_mtd_parser_init(void)
static int __init myloader_mtd_parser_init(void)
{
return register_mtd_parser(&mylo_mtd_parser);
return register_mtd_parser(&myloader_mtd_parser);
}
static void __exit mylo_mtd_parser_exit(void)
static void __exit myloader_mtd_parser_exit(void)
{
deregister_mtd_parser(&mylo_mtd_parser);
deregister_mtd_parser(&myloader_mtd_parser);
}
module_init(mylo_mtd_parser_init);
module_exit(mylo_mtd_parser_exit);
module_init(myloader_mtd_parser_init);
module_exit(myloader_mtd_parser_exit);
MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
MODULE_DESCRIPTION("Parsing code for MyLoader partition tables");