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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 50 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091649.499889647@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright © 2007 Eugene Konev <ejka@openwrt.org>
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*
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* TI AR7 flash partition table.
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* Based on ar7 map by Felix Fietkau <nbd@openwrt.org>
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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/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/memblock.h>
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#include <linux/module.h>
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#include <uapi/linux/magic.h>
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#define AR7_PARTS 4
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#define ROOT_OFFSET 0xe0000
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#define LOADER_MAGIC1 le32_to_cpu(0xfeedfa42)
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#define LOADER_MAGIC2 le32_to_cpu(0xfeed1281)
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struct ar7_bin_rec {
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unsigned int checksum;
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unsigned int length;
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unsigned int address;
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};
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static int create_mtd_partitions(struct mtd_info *master,
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const struct mtd_partition **pparts,
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struct mtd_part_parser_data *data)
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{
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struct ar7_bin_rec header;
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unsigned int offset;
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size_t len;
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unsigned int pre_size = master->erasesize, post_size = 0;
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unsigned int root_offset = ROOT_OFFSET;
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int retries = 10;
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struct mtd_partition *ar7_parts;
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ar7_parts = kcalloc(AR7_PARTS, sizeof(*ar7_parts), GFP_KERNEL);
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if (!ar7_parts)
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return -ENOMEM;
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ar7_parts[0].name = "loader";
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ar7_parts[0].offset = 0;
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ar7_parts[0].size = master->erasesize;
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ar7_parts[0].mask_flags = MTD_WRITEABLE;
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ar7_parts[1].name = "config";
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ar7_parts[1].offset = 0;
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ar7_parts[1].size = master->erasesize;
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ar7_parts[1].mask_flags = 0;
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do { /* Try 10 blocks starting from master->erasesize */
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offset = pre_size;
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mtd_read(master, offset, sizeof(header), &len,
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(uint8_t *)&header);
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if (!strncmp((char *)&header, "TIENV0.8", 8))
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ar7_parts[1].offset = pre_size;
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if (header.checksum == LOADER_MAGIC1)
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break;
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if (header.checksum == LOADER_MAGIC2)
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break;
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pre_size += master->erasesize;
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} while (retries--);
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pre_size = offset;
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if (!ar7_parts[1].offset) {
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ar7_parts[1].offset = master->size - master->erasesize;
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post_size = master->erasesize;
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}
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switch (header.checksum) {
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case LOADER_MAGIC1:
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while (header.length) {
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offset += sizeof(header) + header.length;
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mtd_read(master, offset, sizeof(header), &len,
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(uint8_t *)&header);
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}
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root_offset = offset + sizeof(header) + 4;
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break;
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case LOADER_MAGIC2:
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while (header.length) {
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offset += sizeof(header) + header.length;
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mtd_read(master, offset, sizeof(header), &len,
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(uint8_t *)&header);
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}
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root_offset = offset + sizeof(header) + 4 + 0xff;
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root_offset &= ~(uint32_t)0xff;
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break;
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default:
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printk(KERN_WARNING "Unknown magic: %08x\n", header.checksum);
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break;
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}
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mtd_read(master, root_offset, sizeof(header), &len, (u8 *)&header);
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if (header.checksum != SQUASHFS_MAGIC) {
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root_offset += master->erasesize - 1;
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root_offset &= ~(master->erasesize - 1);
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}
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ar7_parts[2].name = "linux";
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ar7_parts[2].offset = pre_size;
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ar7_parts[2].size = master->size - pre_size - post_size;
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ar7_parts[2].mask_flags = 0;
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ar7_parts[3].name = "rootfs";
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ar7_parts[3].offset = root_offset;
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ar7_parts[3].size = master->size - root_offset - post_size;
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ar7_parts[3].mask_flags = 0;
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*pparts = ar7_parts;
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return AR7_PARTS;
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}
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static struct mtd_part_parser ar7_parser = {
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.parse_fn = create_mtd_partitions,
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.name = "ar7part",
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};
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module_mtd_part_parser(ar7_parser);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR( "Felix Fietkau <nbd@openwrt.org>, "
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"Eugene Konev <ejka@openwrt.org>");
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MODULE_DESCRIPTION("MTD partitioning for TI AR7");
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