mirror of https://github.com/hak5/openwrt.git
42 lines
1.2 KiB
Diff
42 lines
1.2 KiB
Diff
From e892dea7229d56b75c46a76b9039f9e179584a91 Mon Sep 17 00:00:00 2001
|
|
From: Yunhui Cui <B56489@freescale.com>
|
|
Date: Mon, 1 Feb 2016 18:48:49 +0800
|
|
Subject: [PATCH 100/113] mtd:spi_nor: Disable Micron flash HW protection
|
|
|
|
For Micron family ,The status register write enable/disable bit,
|
|
provides hardware data protection for the device.
|
|
When the enable/disable bit is set to 1, the status register
|
|
nonvolatile bits become read-only and the WRITE STATUS REGISTER
|
|
operation will not execute.
|
|
|
|
Signed-off-by: Yunhui Cui <B56489@freescale.com>
|
|
---
|
|
drivers/mtd/spi-nor/spi-nor.c | 9 +++++++++
|
|
1 file changed, 9 insertions(+)
|
|
|
|
--- a/drivers/mtd/spi-nor/spi-nor.c
|
|
+++ b/drivers/mtd/spi-nor/spi-nor.c
|
|
@@ -39,6 +39,7 @@
|
|
|
|
#define SPI_NOR_MAX_ID_LEN 6
|
|
#define SPI_NOR_MAX_ADDR_WIDTH 4
|
|
+#define SPI_NOR_MICRON_WRITE_ENABLE 0x7f
|
|
|
|
struct flash_info {
|
|
char *name;
|
|
@@ -1238,6 +1239,14 @@ int spi_nor_scan(struct spi_nor *nor, co
|
|
if (ret)
|
|
return ret;
|
|
|
|
+ if (JEDEC_MFR(info) == SNOR_MFR_MICRON) {
|
|
+ ret = read_sr(nor);
|
|
+ ret &= SPI_NOR_MICRON_WRITE_ENABLE;
|
|
+
|
|
+ write_enable(nor);
|
|
+ write_sr(nor, ret);
|
|
+ }
|
|
+
|
|
if (!mtd->name)
|
|
mtd->name = dev_name(dev);
|
|
mtd->priv = nor;
|