ralink: add 3.14 support

[openwrt/staging/yousong.git] / target / linux / ramips / patches-3.14 / 0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch

diff --git a/target/linux/ramips/patches-3.14/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch b/target/linux/ramips/patches-3.14/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch
new file mode 100644 (file)
index 0000000..88e0f52
--- /dev/null
+++ b/target/linux/ramips/patches-3.14/0004-MIPS-ralink-adds-a-bootrom-dumper-module.patch
@@ -0,0 +1,83 @@
+From af03898c74172ab16d610f3eeaa65f66401eb7db Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Tue, 21 May 2013 15:50:31 +0200
+Subject: [PATCH 04/57] MIPS: ralink: adds a bootrom dumper module
+
+This patch adds a trivial driver that allows userland to extract the bootrom of
+a SoC via debugfs.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ arch/mips/ralink/Makefile  |    2 ++
+ arch/mips/ralink/bootrom.c |   48 ++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 50 insertions(+)
+ create mode 100644 arch/mips/ralink/bootrom.c
+
+diff --git a/arch/mips/ralink/Makefile b/arch/mips/ralink/Makefile
+index 98ae349..584a8d9 100644
+--- a/arch/mips/ralink/Makefile
++++ b/arch/mips/ralink/Makefile
+@@ -17,4 +17,6 @@ obj-$(CONFIG_SOC_MT7620) += mt7620.o
+ 
+ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+ 
++obj-$(CONFIG_DEBUG_FS) += bootrom.o
++
+ obj-y += dts/
+diff --git a/arch/mips/ralink/bootrom.c b/arch/mips/ralink/bootrom.c
+new file mode 100644
+index 0000000..f926f6f
+--- /dev/null
++++ b/arch/mips/ralink/bootrom.c
+@@ -0,0 +1,48 @@
++/*
++ * 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.
++ *
++ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/debugfs.h>
++#include <linux/seq_file.h>
++
++#define BOOTROM_OFFSET        0x10118000
++#define BOOTROM_SIZE  0x8000
++
++static void __iomem *membase = (void __iomem*) KSEG1ADDR(BOOTROM_OFFSET);
++
++static int bootrom_show(struct seq_file *s, void *unused)
++{
++      seq_write(s, membase, BOOTROM_SIZE);
++
++      return 0;
++}
++
++static int bootrom_open(struct inode *inode, struct file *file)
++{
++      return single_open(file, bootrom_show, NULL);
++}
++
++static const struct file_operations bootrom_file_ops = {
++      .open           = bootrom_open,
++      .read           = seq_read,
++      .llseek         = seq_lseek,
++      .release        = single_release,
++};
++
++static int bootrom_setup(void)
++{
++      if (!debugfs_create_file("bootrom", 0444,
++                      NULL, NULL, &bootrom_file_ops)) {
++              pr_err("Failed to create bootrom debugfs file\n");
++
++              return -EINVAL;
++      }
++
++      return 0;
++}
++
++postcore_initcall(bootrom_setup);
+-- 
+1.7.10.4
+