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authorGabor Juhos <juhosg@openwrt.org>2008-11-17 09:47:03 +0000
committerGabor Juhos <juhosg@openwrt.org>2008-11-17 09:47:03 +0000
commit2aaf71e42f0a08b5c0056a09a3f5df5ddb2c830a (patch)
tree363116fb06dd8d81ba8e34f742250b20954db3f4 /target/linux/adm5120/files/drivers
parent300d8bea55aa679cce4b571f30ce705c27973594 (diff)
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update MyLoader partition parser, add support of named partitions
SVN-Revision: 13255
Diffstat (limited to 'target/linux/adm5120/files/drivers')
-rw-r--r--target/linux/adm5120/files/drivers/mtd/myloader.c100
1 files changed, 57 insertions, 43 deletions
diff --git a/target/linux/adm5120/files/drivers/mtd/myloader.c b/target/linux/adm5120/files/drivers/mtd/myloader.c
index 22d076b..60ebe22 100644
--- a/target/linux/adm5120/files/drivers/mtd/myloader.c
+++ b/target/linux/adm5120/files/drivers/mtd/myloader.c
@@ -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");