+++ /dev/null
-/*
- * AudioCodes AC49x PSPBoot-based flash partition table
- * Copyright 2012 Daniel Golle <daniel.golle@gmail.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 St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/bootmem.h>
-#include <linux/magic.h>
-#include <linux/module.h>
-
-#include <asm/mach-ar7/prom.h>
-
-#define AC49X_MAXENVPARTS 8
-
-#define AC49X_PARTTYPE_LOADER 0
-#define AC49X_PARTTYPE_BOOTENV 1
-#define AC49X_PARTTYPE_LINUX 2
-#define AC49X_PARTTYPE_ROOTFS 3
-#define AC49X_PARTTYPE_UNKNOWN 4
-#define AC49X_NUM_PARTTYPES 5
-
-#define AC49X_FLASH_ADDRMASK 0x00FFFFFF
-
-#define AC49X_LOADER_MAGIC 0x40809000
-#define AC49X_LINUX_MAGIC 0x464c457f /* ELF */
-#define AC49X_BOOTENV_MAGIC 0x4578614d /* MaxE */
-
-#define ROOTFS_MIN_OFFSET 0xC0000
-
-int parse_partvar(const unsigned char *partvar, struct mtd_partition *part)
-{
- unsigned int partstart, partend;
- unsigned int pnum;
-
- pnum = sscanf(partvar, "0x%x,0x%x", &partstart, &partend);
- if (pnum != 2)
- return 1;
-
- part->offset = partstart & AC49X_FLASH_ADDRMASK;
- part->size = partend - partstart;
-
- return 0;
-}
-
-int detect_parttype(struct mtd_info *master, struct mtd_partition part)
-{
- unsigned int magic;
- size_t len;
-
- if (part.size < 4)
- return -1;
-
- mtd_read(master, part.offset, sizeof(magic), &len,
- (uint8_t *)&magic);
-
- if (len != sizeof(magic))
- return -1;
-
- switch (magic) {
- case AC49X_LOADER_MAGIC:
- return AC49X_PARTTYPE_LOADER;
- case AC49X_LINUX_MAGIC:
- return AC49X_PARTTYPE_LINUX;
- case SQUASHFS_MAGIC:
- case CRAMFS_MAGIC:
- case CRAMFS_MAGIC_WEND:
- return AC49X_PARTTYPE_ROOTFS;
- case AC49X_BOOTENV_MAGIC:
- return AC49X_PARTTYPE_BOOTENV;
- default:
- switch (magic & 0xFF) {
- case JFFS2_SUPER_MAGIC:
- return AC49X_PARTTYPE_ROOTFS;
- }
- switch (magic >> 8) {
- case JFFS2_SUPER_MAGIC:
- return AC49X_PARTTYPE_ROOTFS;
- }
- return AC49X_PARTTYPE_UNKNOWN;
- }
-}
-
-const char *partnames[] = {
- "loader",
- "config",
- "linux",
- "rootfs",
- "data"
-};
-
-void gen_partname(unsigned int type,
- unsigned int *typenumeration,
- struct mtd_partition *part)
-{
- char *s = kzalloc(sizeof(char) * 8, GFP_KERNEL);
-
- (typenumeration[type])++;
- if (typenumeration[type] == 1)
- sprintf(s, "%s", partnames[type]);
- else
- sprintf(s, "%s%d", partnames[type], typenumeration[type]);
-
- part->name = s;
-}
-
-static int create_mtd_partitions(struct mtd_info *master,
- struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
-{
- unsigned int envpartnum = 0, linuxpartnum = 0;
- unsigned int typenumeration[5] = { 0, 0, 0, 0, 0 };
- unsigned char evn[5];
- const unsigned char *partvar = NULL;
-
- struct mtd_partition *ac49x_parts;
-
- ac49x_parts = kzalloc(sizeof(*ac49x_parts) * AC49X_MAXENVPARTS,
- GFP_KERNEL);
-
- if (!ac49x_parts)
- return -ENOMEM;
-
- linuxpartnum = 0;
- for (envpartnum = 0; envpartnum < AC49X_MAXENVPARTS; envpartnum++) {
- struct mtd_partition parsepart;
- unsigned int offset, size, type;
- int err;
- sprintf(evn, "mtd%d", envpartnum);
- partvar = prom_getenv(evn);
- if (!partvar)
- continue;
- err = parse_partvar(partvar, &parsepart);
- if (err)
- continue;
- offset = parsepart.offset;
- size = parsepart.size;
- type = detect_parttype(master, parsepart);
- gen_partname(type, typenumeration, &parsepart);
- /* protect loader */
- if (type == AC49X_PARTTYPE_LOADER)
- parsepart.mask_flags = MTD_WRITEABLE;
- else
- parsepart.mask_flags = 0;
-
- memcpy(&(ac49x_parts[linuxpartnum]), &parsepart,
- sizeof(struct mtd_partition));
-
- /* scan for contained rootfs */
- if (type == AC49X_PARTTYPE_LINUX) {
- parsepart.offset += ROOTFS_MIN_OFFSET &
- ~(master->erasesize - 1);
- parsepart.size -= ROOTFS_MIN_OFFSET &
- ~(master->erasesize - 1);
- do {
- unsigned int size, offset;
- size = parsepart.size;
- offset = parsepart.offset;
-
- type = detect_parttype(master, parsepart);
- if (type == AC49X_PARTTYPE_ROOTFS) {
- gen_partname(type, typenumeration,
- &parsepart);
- printk(KERN_INFO
- "%s %s: 0x%08x@0x%08x\n",
- "detected sub-partition",
- parsepart.name,
- (unsigned int)parsepart.size,
- (unsigned int)parsepart.offset);
- linuxpartnum++;
- memcpy(&(ac49x_parts[linuxpartnum]),
- &parsepart,
- sizeof(struct mtd_partition));
- break;
- }
- parsepart.offset += master->erasesize;
- parsepart.size -= master->erasesize;
- } while (parsepart.size >= master->erasesize);
- }
- linuxpartnum++;
- }
-
- *pparts = ac49x_parts;
- return linuxpartnum;
-}
-
-static struct mtd_part_parser ac49x_parser = {
- .owner = THIS_MODULE,
- .parse_fn = create_mtd_partitions,
- .name = "ac49xpart",
-};
-
-static int __init ac49x_parser_init(void)
-{
- return register_mtd_parser(&ac49x_parser);
-}
-
-module_init(ac49x_parser_init);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Daniel Golle <daniel.golle@gmail.com>");
-MODULE_DESCRIPTION("MTD partitioning for AudioCodes AC49x");
projects / openwrt / svn-archive / archive.git / blobdiff