+++ /dev/null
-/*
- * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/magic.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/version.h>
-
-#define TPLINK_NUM_PARTS 5
-#define TPLINK_HEADER_V1 0x01000000
-#define TPLINK_HEADER_V2 0x02000000
-#define MD5SUM_LEN 16
-
-#define TPLINK_ART_LEN 0x10000
-#define TPLINK_KERNEL_OFFS 0x20000
-#define TPLINK_64K_KERNEL_OFFS 0x10000
-
-struct tplink_fw_header {
- uint32_t version; /* header version */
- char vendor_name[24];
- char fw_version[36];
- uint32_t hw_id; /* hardware id */
- uint32_t hw_rev; /* hardware revision */
- uint32_t unk1;
- uint8_t md5sum1[MD5SUM_LEN];
- uint32_t unk2;
- uint8_t md5sum2[MD5SUM_LEN];
- uint32_t unk3;
- uint32_t kernel_la; /* kernel load address */
- uint32_t kernel_ep; /* kernel entry point */
- uint32_t fw_length; /* total length of the firmware */
- uint32_t kernel_ofs; /* kernel data offset */
- uint32_t kernel_len; /* kernel data length */
- uint32_t rootfs_ofs; /* rootfs data offset */
- uint32_t rootfs_len; /* rootfs data length */
- uint32_t boot_ofs; /* bootloader data offset */
- uint32_t boot_len; /* bootloader data length */
- uint8_t pad[360];
-} __attribute__ ((packed));
-
-static struct tplink_fw_header *
-tplink_read_header(struct mtd_info *mtd, size_t offset)
-{
- struct tplink_fw_header *header;
- size_t header_len;
- size_t retlen;
- int ret;
- u32 t;
-
- header = vmalloc(sizeof(*header));
- if (!header)
- goto err;
-
- header_len = sizeof(struct tplink_fw_header);
- ret = mtd_read(mtd, offset, header_len, &retlen,
- (unsigned char *) header);
- if (ret)
- goto err_free_header;
-
- if (retlen != header_len)
- goto err_free_header;
-
- /* sanity checks */
- t = be32_to_cpu(header->version);
- if ((t != TPLINK_HEADER_V1) && (t != TPLINK_HEADER_V2))
- goto err_free_header;
-
- t = be32_to_cpu(header->kernel_ofs);
- if (t != header_len)
- goto err_free_header;
-
- return header;
-
-err_free_header:
- vfree(header);
-err:
- return NULL;
-}
-
-static int tplink_check_rootfs_magic(struct mtd_info *mtd, size_t offset)
-{
- u32 magic;
- size_t retlen;
- int ret;
-
- ret = mtd_read(mtd, offset, sizeof(magic), &retlen,
- (unsigned char *) &magic);
- if (ret)
- return ret;
-
- if (retlen != sizeof(magic))
- return -EIO;
-
- if (le32_to_cpu(magic) != SQUASHFS_MAGIC &&
- magic != 0x19852003)
- return -EINVAL;
-
- return 0;
-}
-
-static int tplink_parse_partitions_offset(struct mtd_info *master,
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
- struct mtd_partition **pparts,
-#else
- const struct mtd_partition **pparts,
-#endif
- struct mtd_part_parser_data *data,
- size_t offset)
-{
- struct mtd_partition *parts;
- struct tplink_fw_header *header;
- int nr_parts;
- size_t art_offset;
- size_t rootfs_offset;
- size_t squashfs_offset;
- int ret;
-
- nr_parts = TPLINK_NUM_PARTS;
- parts = kzalloc(nr_parts * sizeof(struct mtd_partition), GFP_KERNEL);
- if (!parts) {
- ret = -ENOMEM;
- goto err;
- }
-
- header = tplink_read_header(master, offset);
- if (!header) {
- pr_notice("%s: no TP-Link header found\n", master->name);
- ret = -ENODEV;
- goto err_free_parts;
- }
-
- squashfs_offset = offset + sizeof(struct tplink_fw_header) +
- be32_to_cpu(header->kernel_len);
-
- ret = tplink_check_rootfs_magic(master, squashfs_offset);
- if (ret == 0)
- rootfs_offset = squashfs_offset;
- else
- rootfs_offset = offset + be32_to_cpu(header->rootfs_ofs);
-
- art_offset = master->size - TPLINK_ART_LEN;
-
- parts[0].name = "u-boot";
- parts[0].offset = 0;
- parts[0].size = offset;
- parts[0].mask_flags = MTD_WRITEABLE;
-
- parts[1].name = "kernel";
- parts[1].offset = offset;
- parts[1].size = rootfs_offset - offset;
-
- parts[2].name = "rootfs";
- parts[2].offset = rootfs_offset;
- parts[2].size = art_offset - rootfs_offset;
-
- parts[3].name = "art";
- parts[3].offset = art_offset;
- parts[3].size = TPLINK_ART_LEN;
- parts[3].mask_flags = MTD_WRITEABLE;
-
- parts[4].name = "firmware";
- parts[4].offset = offset;
- parts[4].size = art_offset - offset;
-
- vfree(header);
-
- *pparts = parts;
- return nr_parts;
-
-err_free_parts:
- kfree(parts);
-err:
- *pparts = NULL;
- return ret;
-}
-
-static int tplink_parse_partitions(struct mtd_info *master,
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
- struct mtd_partition **pparts,
-#else
- const struct mtd_partition **pparts,
-#endif
- struct mtd_part_parser_data *data)
-{
- return tplink_parse_partitions_offset(master, pparts, data,
- TPLINK_KERNEL_OFFS);
-}
-
-static int tplink_parse_64k_partitions(struct mtd_info *master,
-#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
- struct mtd_partition **pparts,
-#else
- const struct mtd_partition **pparts,
-#endif
- struct mtd_part_parser_data *data)
-{
- return tplink_parse_partitions_offset(master, pparts, data,
- TPLINK_64K_KERNEL_OFFS);
-}
-
-static struct mtd_part_parser tplink_parser = {
- .owner = THIS_MODULE,
- .parse_fn = tplink_parse_partitions,
- .name = "tp-link",
-};
-
-static struct mtd_part_parser tplink_64k_parser = {
- .owner = THIS_MODULE,
- .parse_fn = tplink_parse_64k_partitions,
- .name = "tp-link-64k",
-};
-
-static int __init tplink_parser_init(void)
-{
- register_mtd_parser(&tplink_parser);
- register_mtd_parser(&tplink_64k_parser);
-
- return 0;
-}
-
-module_init(tplink_parser_init);
-
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
projects / openwrt / staging / hauke.git / blobdiff