1 From d0d5dff525d921a7200d4919ea46c51fce27b7fb Mon Sep 17 00:00:00 2001
2 From: John Crispin <blogic@openwrt.org>
3 Date: Tue, 21 May 2013 15:50:31 +0200
4 Subject: [PATCH 50/79] MIPS: ralink: adds a bootrom dumper module
6 This patch adds a trivial driver that allows userland to extract the bootrom of
9 Signed-off-by: John Crispin <blogic@openwrt.org>
11 arch/mips/ralink/Makefile | 2 ++
12 arch/mips/ralink/bootrom.c | 48 ++++++++++++++++++++++++++++++++++++++++++++
13 2 files changed, 50 insertions(+)
14 create mode 100644 arch/mips/ralink/bootrom.c
16 diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
17 index cae7d88..5fa6129 100644
18 --- a/arch/mips/ralink/Makefile
19 +++ b/arch/mips/ralink/Makefile
20 @@ -15,4 +15,6 @@ obj-$(CONFIG_SOC_MT7620) += mt7620.o
22 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
24 +obj-$(CONFIG_DEBUG_FS) += bootrom.o
27 diff --git a/arch/mips/ralink/bootrom.c b/arch/mips/ralink/bootrom.c
29 index 0000000..f926f6f
31 +++ b/arch/mips/ralink/bootrom.c
34 + * This program is free software; you can redistribute it and/or modify it
35 + * under the terms of the GNU General Public License version 2 as published
36 + * by the Free Software Foundation.
38 + * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
41 +#include <linux/debugfs.h>
42 +#include <linux/seq_file.h>
44 +#define BOOTROM_OFFSET 0x10118000
45 +#define BOOTROM_SIZE 0x8000
47 +static void __iomem *membase = (void __iomem*) KSEG1ADDR(BOOTROM_OFFSET);
49 +static int bootrom_show(struct seq_file *s, void *unused)
51 + seq_write(s, membase, BOOTROM_SIZE);
56 +static int bootrom_open(struct inode *inode, struct file *file)
58 + return single_open(file, bootrom_show, NULL);
61 +static const struct file_operations bootrom_file_ops = {
62 + .open = bootrom_open,
64 + .llseek = seq_lseek,
65 + .release = single_release,
68 +static int bootrom_setup(void)
70 + if (!debugfs_create_file("bootrom", 0444,
71 + NULL, NULL, &bootrom_file_ops)) {
72 + pr_err("Failed to create bootrom debugfs file\n");
80 +postcore_initcall(bootrom_setup);