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Add myloader partition table parser

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SVN-Revision: 6736
This commit is contained in:
Florian Fainelli 2007-03-28 08:35:10 +00:00
parent 7f409744a4
commit d8bf22859b
3 changed files with 217 additions and 4 deletions
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6
target/linux/adm5120-2.6/config/default
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@ -226,6 +226,7 @@ CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MTDRAM is not set
CONFIG_MTD_MYLOADER_PARTS=y
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_ECC_SMC is not set
@ -240,10 +241,7 @@ CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_PLATRAM is not set
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_RAM is not set
CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-1
CONFIG_MTD_REDBOOT_PARTS=m
CONFIG_MTD_REDBOOT_PARTS_READONLY=y
CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED=y
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_NETFILTER_XTABLES is not set

178
target/linux/adm5120-2.6/files/drivers/mtd/myloader.c Normal file
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@ -0,0 +1,178 @@
/*
* Parse MyLoader-style flash partition tables and produce a Linux partition
* array to match.
*
* Copyright (C) 2007 OpenWrt.org
* Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
*
* This file was based on drivers/mtd/redboot.c
* Author: Red Hat, Inc. - David Woodhouse <dwmw2@cambridge.redhat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <linux/kernel.h>
#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 <asm/mach-adm5120/myloader.h>
#define NAME_LEN_MAX 20
#define NAME_MYLOADER "MyLoader"
#define NAME_PARTITION_TABLE "Partition Table"
#define BLOCK_LEN_MIN 0x10000
static int parse_myloader_partitions(struct mtd_info *master,
struct mtd_partition **pparts,
unsigned long origin)
{
struct mylo_partition_table *tab;
struct mylo_partition *part;
struct mtd_partition *mtd_parts;
struct mtd_partition *mtd_part;
int num_parts;
int ret, i;
size_t retlen;
size_t parts_len;
char *names;
unsigned long offset;
unsigned long blocklen;
tab = vmalloc(sizeof(*tab));
if (!tab) {
return -ENOMEM;
goto out;
}
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 "Searching for MyLoader partition table "
"in %s at offset 0x%lx\n", master->name, offset);
ret = master->read(master, offset, sizeof(*tab), &retlen,
(void *)tab);
if (ret)
goto out;
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 "No MyLoader partition table detected "
"in %s\n", master->name);
ret = 0;
goto out_free_buf;
}
/* The MyLoader and the Partition Table is always present */
num_parts = 2;
/* Detect number of used partitions */
for (i = 0; i < MYLO_MAX_PARTITIONS; i++) {
part = &tab->partitions[i];
if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE)
continue;
num_parts++;
}
mtd_parts = kzalloc((num_parts*sizeof(*mtd_part) + num_parts*NAME_LEN_MAX),
GFP_KERNEL);
if (!mtd_parts) {
ret = -ENOMEM;
goto out_free_buf;
}
mtd_part = mtd_parts;
names = (char *)&mtd_parts[num_parts];
strcpy(NAME_MYLOADER, names);
mtd_part->name = names;
mtd_part->offset = 0;
mtd_part->size = blocklen;
mtd_part++;
names += NAME_LEN_MAX;
strcpy(NAME_PARTITION_TABLE, names);
mtd_part->name = names;
mtd_part->offset = blocklen;
mtd_part->size = blocklen;
mtd_part++;
names += NAME_LEN_MAX;
for (i = 0; i < MYLO_MAX_PARTITIONS; i++) {
part = &tab->partitions[i];
if (le16_to_cpu(part->type) == PARTITION_TYPE_FREE)
continue;
sprintf(names, "partition%d", i);
mtd_part->name = names;
mtd_part->offset = le32_to_cpu(part->addr);
mtd_part->size = le32_to_cpu(part->size);
mtd_part++;
names += NAME_LEN_MAX;
}
*pparts = mtd_parts;
ret = num_parts;
out_free_buf:
vfree(tab);
out:
return ret;
}
static struct mtd_part_parser mylo_mtd_parser = {
.owner = THIS_MODULE,
.parse_fn = parse_myloader_partitions,
.name = NAME_MYLOADER,
};
static int __init mylo_mtd_parser_init(void)
{
return register_mtd_parser(&mylo_mtd_parser);
}
static void __exit mylo_mtd_parser_exit(void)
{
deregister_mtd_parser(&mylo_mtd_parser);
}
module_init(mylo_mtd_parser_init);
module_exit(mylo_mtd_parser_exit);
EXPORT_SYMBOL_GPL(parse_myloader_partitions);
MODULE_AUTHOR("Gabor Juhos <juhosg@freemail.hu>");
MODULE_DESCRIPTION("Parsing code for MyLoader partition tables");
MODULE_LICENSE("GPL");

37
target/linux/adm5120-2.6/patches/100-mtd-myloder-partition-parser.patch Normal file
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@ -0,0 +1,37 @@
diff -Nur linux-2.6.19.2/drivers/mtd/Kconfig.old linux-2.6.19.2/drivers/mtd/Kconfig
--- linux-2.6.19.2/drivers/mtd/Kconfig.old 2007-03-25 08:13:02.000000000 +0200
+++ linux-2.6.19.2/drivers/mtd/Kconfig 2007-03-26 13:37:47.000000000 +0200
@@ -157,6 +157,22 @@
for your particular device. It won't happen automatically. The
'armflash' map driver (CONFIG_MTD_ARMFLASH) does this, for example.
+config MTD_MYLOADER_PARTS
+ tristate "MyLoader partition parsing"
+ depends on MIPS_ADM5120 && MTD_PARTITIONS
+ ---help---
+ MyLoader is a bootloader which allows the user to define partitions
+ in flash devices, by putting a table in the second erase block
+ on the device, similar to a partition table. This table gives the
+ offsets and lengths of the user defined partitions.
+
+ If you need code which can detect and parse these tables, and
+ register MTD 'partitions' corresponding to each image detected,
+ enable this option.
+
+ You will still need the parsing functions to be called by the driver
+ for your particular device. It won't happen automatically.
+
comment "User Modules And Translation Layers"
depends on MTD
diff -Nur linux-2.6.19.2/drivers/mtd/Makefile.old linux-2.6.19.2/drivers/mtd/Makefile
--- linux-2.6.19.2/drivers/mtd/Makefile.old 2007-01-10 20:10:37.000000000 +0100
+++ linux-2.6.19.2/drivers/mtd/Makefile 2007-03-26 13:28:23.000000000 +0200
@@ -12,6 +12,7 @@
obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
+obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
# 'Users' - code which presents functionality to userspace.
obj-$(CONFIG_MTD_CHAR) += mtdchar.o