mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-22 00:40:03 +00:00
![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 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 version 2 as published by the free software foundation 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
129 lines
2.7 KiB
C
129 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Parser for TRX format partitions
|
|
*
|
|
* Copyright (C) 2012 - 2017 Rafał Miłecki <rafal@milecki.pl>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#define TRX_PARSER_MAX_PARTS 4
|
|
|
|
/* Magics */
|
|
#define TRX_MAGIC 0x30524448
|
|
#define UBI_EC_MAGIC 0x23494255 /* UBI# */
|
|
|
|
struct trx_header {
|
|
uint32_t magic;
|
|
uint32_t length;
|
|
uint32_t crc32;
|
|
uint16_t flags;
|
|
uint16_t version;
|
|
uint32_t offset[3];
|
|
} __packed;
|
|
|
|
static const char *parser_trx_data_part_name(struct mtd_info *master,
|
|
size_t offset)
|
|
{
|
|
uint32_t buf;
|
|
size_t bytes_read;
|
|
int err;
|
|
|
|
err = mtd_read(master, offset, sizeof(buf), &bytes_read,
|
|
(uint8_t *)&buf);
|
|
if (err && !mtd_is_bitflip(err)) {
|
|
pr_err("mtd_read error while parsing (offset: 0x%zX): %d\n",
|
|
offset, err);
|
|
goto out_default;
|
|
}
|
|
|
|
if (buf == UBI_EC_MAGIC)
|
|
return "ubi";
|
|
|
|
out_default:
|
|
return "rootfs";
|
|
}
|
|
|
|
static int parser_trx_parse(struct mtd_info *mtd,
|
|
const struct mtd_partition **pparts,
|
|
struct mtd_part_parser_data *data)
|
|
{
|
|
struct mtd_partition *parts;
|
|
struct mtd_partition *part;
|
|
struct trx_header trx;
|
|
size_t bytes_read;
|
|
uint8_t curr_part = 0, i = 0;
|
|
int err;
|
|
|
|
parts = kcalloc(TRX_PARSER_MAX_PARTS, sizeof(struct mtd_partition),
|
|
GFP_KERNEL);
|
|
if (!parts)
|
|
return -ENOMEM;
|
|
|
|
err = mtd_read(mtd, 0, sizeof(trx), &bytes_read, (uint8_t *)&trx);
|
|
if (err) {
|
|
pr_err("MTD reading error: %d\n", err);
|
|
kfree(parts);
|
|
return err;
|
|
}
|
|
|
|
if (trx.magic != TRX_MAGIC) {
|
|
kfree(parts);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* We have LZMA loader if there is address in offset[2] */
|
|
if (trx.offset[2]) {
|
|
part = &parts[curr_part++];
|
|
part->name = "loader";
|
|
part->offset = trx.offset[i];
|
|
i++;
|
|
}
|
|
|
|
if (trx.offset[i]) {
|
|
part = &parts[curr_part++];
|
|
part->name = "linux";
|
|
part->offset = trx.offset[i];
|
|
i++;
|
|
}
|
|
|
|
if (trx.offset[i]) {
|
|
part = &parts[curr_part++];
|
|
part->name = parser_trx_data_part_name(mtd, trx.offset[i]);
|
|
part->offset = trx.offset[i];
|
|
i++;
|
|
}
|
|
|
|
/*
|
|
* Assume that every partition ends at the beginning of the one it is
|
|
* followed by.
|
|
*/
|
|
for (i = 0; i < curr_part; i++) {
|
|
u64 next_part_offset = (i < curr_part - 1) ?
|
|
parts[i + 1].offset : mtd->size;
|
|
|
|
parts[i].size = next_part_offset - parts[i].offset;
|
|
}
|
|
|
|
*pparts = parts;
|
|
return i;
|
|
};
|
|
|
|
static const struct of_device_id mtd_parser_trx_of_match_table[] = {
|
|
{ .compatible = "brcm,trx" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mtd_parser_trx_of_match_table);
|
|
|
|
static struct mtd_part_parser mtd_parser_trx = {
|
|
.parse_fn = parser_trx_parse,
|
|
.name = "trx",
|
|
.of_match_table = mtd_parser_trx_of_match_table,
|
|
};
|
|
module_mtd_part_parser(mtd_parser_trx);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("Parser for TRX format partitions");
|