parent
fc7fb29bae
commit
514b1167c9
@ -0,0 +1,165 @@ |
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/*
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* Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 as published |
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* by the Free Software Foundation. |
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* |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/slab.h> |
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#include <linux/vmalloc.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/partitions.h> |
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#define TPLINK_NUM_PARTS 5 |
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#define TPLINK_HEADER_V1 0x01000000 |
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#define MD5SUM_LEN 16 |
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#define TPLINK_ART_LEN 0x10000 |
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#define TPLINK_KERNEL_OFFS 0x20000 |
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struct tplink_fw_header { |
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uint32_t version; /* header version */ |
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char vendor_name[24]; |
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char fw_version[36]; |
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uint32_t hw_id; /* hardware id */ |
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uint32_t hw_rev; /* hardware revision */ |
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uint32_t unk1; |
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uint8_t md5sum1[MD5SUM_LEN]; |
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uint32_t unk2; |
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uint8_t md5sum2[MD5SUM_LEN]; |
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uint32_t unk3; |
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uint32_t kernel_la; /* kernel load address */ |
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uint32_t kernel_ep; /* kernel entry point */ |
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uint32_t fw_length; /* total length of the firmware */ |
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uint32_t kernel_ofs; /* kernel data offset */ |
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uint32_t kernel_len; /* kernel data length */ |
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uint32_t rootfs_ofs; /* rootfs data offset */ |
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uint32_t rootfs_len; /* rootfs data length */ |
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uint32_t boot_ofs; /* bootloader data offset */ |
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uint32_t boot_len; /* bootloader data length */ |
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uint8_t pad[360]; |
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} __attribute__ ((packed)); |
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static struct tplink_fw_header * |
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tplink_read_header(struct mtd_info *mtd, size_t offset) |
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{ |
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struct tplink_fw_header *header; |
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size_t header_len; |
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size_t retlen; |
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int ret; |
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u32 t; |
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header = vmalloc(sizeof(*header)); |
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if (!header) |
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goto err; |
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header_len = sizeof(struct tplink_fw_header); |
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ret = mtd->read(mtd, offset, header_len, &retlen, |
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(unsigned char *) header); |
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if (ret) |
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goto err_free_header; |
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if (retlen != header_len) |
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goto err_free_header; |
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/* sanity checks */ |
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t = be32_to_cpu(header->version); |
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if (t != TPLINK_HEADER_V1) |
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goto err_free_header; |
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t = be32_to_cpu(header->kernel_ofs); |
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if (t != header_len) |
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goto err_free_header; |
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return header; |
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err_free_header: |
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vfree(header); |
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err: |
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return NULL; |
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} |
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static int tplink_parse_partitions(struct mtd_info *master, |
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struct mtd_partition **pparts, |
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unsigned long origin) |
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{ |
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struct mtd_partition *parts; |
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struct tplink_fw_header *header; |
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int nr_parts; |
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size_t offset; |
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size_t art_offset; |
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size_t rootfs_offset; |
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int ret; |
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nr_parts = TPLINK_NUM_PARTS; |
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parts = kzalloc(nr_parts * sizeof(struct mtd_partition), GFP_KERNEL); |
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if (!parts) { |
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ret = -ENOMEM; |
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goto err; |
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} |
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offset = TPLINK_KERNEL_OFFS; |
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header = tplink_read_header(master, offset); |
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if (!header) { |
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pr_notice("%s: no TP-Link header found\n", master->name); |
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ret = -ENODEV; |
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goto err_free_parts; |
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} |
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rootfs_offset = offset + be32_to_cpu(header->rootfs_ofs); |
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art_offset = master->size - TPLINK_ART_LEN; |
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parts[0].name = "u-boot"; |
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parts[0].offset = 0; |
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parts[0].size = offset; |
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parts[0].mask_flags = MTD_WRITEABLE; |
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parts[1].name = "kernel"; |
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parts[1].offset = offset; |
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parts[1].size = rootfs_offset - offset; |
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parts[2].name = "rootfs"; |
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parts[2].offset = rootfs_offset; |
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parts[2].size = art_offset - rootfs_offset; |
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parts[3].name = "art"; |
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parts[3].offset = art_offset; |
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parts[3].size = TPLINK_ART_LEN; |
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parts[3].mask_flags = MTD_WRITEABLE; |
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parts[4].name = "firmware"; |
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parts[4].offset = offset; |
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parts[4].size = art_offset - offset; |
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vfree(header); |
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*pparts = parts; |
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return nr_parts; |
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err_free_parts: |
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kfree(parts); |
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err: |
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*pparts = NULL; |
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return ret; |
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} |
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static struct mtd_part_parser tplink_parser = { |
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.owner = THIS_MODULE, |
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.parse_fn = tplink_parse_partitions, |
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.name = "tp-link", |
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}; |
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static int __init tplink_parser_init(void) |
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{ |
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return register_mtd_parser(&tplink_parser); |
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} |
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module_init(tplink_parser_init); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); |
@ -0,0 +1,25 @@ |
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--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -198,6 +198,12 @@ config MTD_MYLOADER_PARTS
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You will still need the parsing functions to be called by the driver
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for your particular device. It won't happen automatically.
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+config MTD_TPLINK_PARTS
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+ tristate "TP-Link AR7XXX/AR9XXX partitioning support"
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+ depends on MTD_PARTITIONS && ATHEROS_AR71XX
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+ ---help---
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+ TBD.
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+
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comment "User Modules And Translation Layers"
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config MTD_CHAR
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--- a/drivers/mtd/Makefile
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+++ b/drivers/mtd/Makefile
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@@ -14,6 +14,7 @@ obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
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obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
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obj-$(CONFIG_MTD_WRT160NL_PARTS) += wrt160nl_part.o
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obj-$(CONFIG_MTD_MYLOADER_PARTS) += myloader.o
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+obj-$(CONFIG_MTD_TPLINK_PARTS) += tplinkpart.o
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# 'Users' - code which presents functionality to userspace.
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obj-$(CONFIG_MTD_CHAR) += mtdchar.o
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