From c63ef048747629cde1be29cb9eda4b2c5b10ee93 Mon Sep 17 00:00:00 2001
From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Fri, 18 May 2012 16:04:10 +0000
Subject: [PATCH] brcm47xx: fix nvram read out on devices with serial flash
detect nvram on Linksys E3200
SVN-Revision: 31790
---
.../029-bcm47xx-read-nvram-from-sflash.patch | 53 ++++++++++---------
.../030-bcm47xx-bcma-nandflash.patch | 6 +--
...urn-number-of-written-bytes-in-nvram.patch | 2 +-
.../patches-3.3/400-arch-bcm47xx.patch | 2 +-
.../patches-3.3/820-wgt634u-nvram-fix.patch | 4 +-
5 files changed, 36 insertions(+), 31 deletions(-)
diff --git a/target/linux/brcm47xx/patches-3.3/029-bcm47xx-read-nvram-from-sflash.patch b/target/linux/brcm47xx/patches-3.3/029-bcm47xx-read-nvram-from-sflash.patch
index b3d13df39f..1a994d9037 100644
--- a/target/linux/brcm47xx/patches-3.3/029-bcm47xx-read-nvram-from-sflash.patch
+++ b/target/linux/brcm47xx/patches-3.3/029-bcm47xx-read-nvram-from-sflash.patch
@@ -24,7 +24,7 @@
base = bcma_cc->pflash.window;
lim = bcma_cc->pflash.window_size;
break;
-@@ -86,7 +84,110 @@ found:
+@@ -86,7 +84,115 @@ found:
for (i = 0; i < sizeof(struct nvram_header); i += 4)
*dst++ = *src++;
for (; i < header->len && i < NVRAM_SPACE; i += 4)
@@ -32,44 +32,49 @@
+ *dst++ = *src++;
+}
+
-+static int early_nvram_init_sflash(void)
++static int find_nvram_size(void)
+{
+ struct nvram_header header;
++ int nvram_sizes[] = {NVRAM_SPACE, 0xF000, 2 * NVRAM_SPACE};
++ int i;
++ int ret;
++
++ for (i = 0; i < sizeof(nvram_sizes); i++) {
++ ret = bcm47xx_sflash.read(&bcm47xx_sflash, bcm47xx_sflash.size - nvram_sizes[i], sizeof(header), (u8 *)&header);
++ if (ret != sizeof(header))
++ return ret;
++ if (header.magic == NVRAM_HEADER)
++ return nvram_sizes[i];
++ }
++ return -1;
++}
++
++static int early_nvram_init_sflash(void)
++{
+ u32 off;
+ int ret;
+ char *dst;
+ int len;
++ int size;
+
+ /* check if the struct is already initilized */
+ if (!bcm47xx_sflash.size)
+ return -1;
+
-+ off = FLASH_MIN;
-+ while (off <= bcm47xx_sflash.size) {
-+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - NVRAM_SPACE, sizeof(header), (u8 *)&header);
-+ if (ret != sizeof(header))
-+ return ret;
-+ if (header.magic == NVRAM_HEADER)
-+ goto found;
-+ off <<= 1;
-+ }
++ size = find_nvram_size();
++ if (size <= 0)
++ return size;
+
-+ off = FLASH_MIN;
-+ while (off <= bcm47xx_sflash.size) {
-+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), sizeof(header), (u8 *)&header);
-+ if (ret != sizeof(header))
-+ return ret;
-+ if (header.magic == NVRAM_HEADER)
-+ goto found;
-+ off <<= 1;
-+ }
-+ return -1;
-+
-+found:
+ len = NVRAM_SPACE;
+ dst = nvram_buf;
++ off = bcm47xx_sflash.size;
++ if (size > len) {
++ printk(KERN_WARNING "nvram on flash is bigger than the reserved"
++ " space in memory, will just copy the first %i bytes\n",
++ len);
++ }
+ while (len) {
-+ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - (2 * NVRAM_SPACE), len, dst);
++ ret = bcm47xx_sflash.read(&bcm47xx_sflash, off - size, len, dst);
+ if (ret < 0)
+ return ret;
+ off += ret;
diff --git a/target/linux/brcm47xx/patches-3.3/030-bcm47xx-bcma-nandflash.patch b/target/linux/brcm47xx/patches-3.3/030-bcm47xx-bcma-nandflash.patch
index 03dd321b16..00f3311a0d 100644
--- a/target/linux/brcm47xx/patches-3.3/030-bcm47xx-bcma-nandflash.patch
+++ b/target/linux/brcm47xx/patches-3.3/030-bcm47xx-bcma-nandflash.patch
@@ -46,7 +46,7 @@
static char nvram_buf[NVRAM_SPACE];
-@@ -134,6 +136,51 @@ found:
+@@ -139,6 +141,51 @@ static int early_nvram_init_sflash(void)
return 0;
}
@@ -64,7 +64,7 @@
+ /* check if the struct is already initilized */
+ if (!flash_size)
+ return -1;
-+
++
+ cfe_env = 0;
+
+ off = FLASH_MIN;
@@ -98,7 +98,7 @@
#ifdef CONFIG_BCM47XX_SSB
static void early_nvram_init_ssb(void)
{
-@@ -168,6 +215,11 @@ static void early_nvram_init_bcma(void)
+@@ -173,6 +220,11 @@ static void early_nvram_init_bcma(void)
if (err < 0)
printk(KERN_WARNING "can not read from flash: %i\n", err);
break;
diff --git a/target/linux/brcm47xx/patches-3.3/197-MIPS-BCM47XX-return-number-of-written-bytes-in-nvram.patch b/target/linux/brcm47xx/patches-3.3/197-MIPS-BCM47XX-return-number-of-written-bytes-in-nvram.patch
index 4c4507c2db..0a8c0a386f 100644
--- a/target/linux/brcm47xx/patches-3.3/197-MIPS-BCM47XX-return-number-of-written-bytes-in-nvram.patch
+++ b/target/linux/brcm47xx/patches-3.3/197-MIPS-BCM47XX-return-number-of-written-bytes-in-nvram.patch
@@ -1,7 +1,7 @@
--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
-@@ -263,8 +263,7 @@ int nvram_getenv(char *name, char *val,
+@@ -268,8 +268,7 @@ int nvram_getenv(char *name, char *val,
value = eq + 1;
if ((eq - var) == strlen(name) &&
strncmp(var, name, (eq - var)) == 0) {
diff --git a/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch b/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
index 796a98aa82..c3c7aea541 100644
--- a/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
+++ b/target/linux/brcm47xx/patches-3.3/400-arch-bcm47xx.patch
@@ -1,6 +1,6 @@
--- a/arch/mips/bcm47xx/nvram.c
+++ b/arch/mips/bcm47xx/nvram.c
-@@ -269,3 +269,30 @@ int nvram_getenv(char *name, char *val,
+@@ -274,3 +274,30 @@ int nvram_getenv(char *name, char *val,
return NVRAM_ERR_ENVNOTFOUND;
}
EXPORT_SYMBOL(nvram_getenv);
diff --git a/target/linux/brcm47xx/patches-3.3/820-wgt634u-nvram-fix.patch b/target/linux/brcm47xx/patches-3.3/820-wgt634u-nvram-fix.patch
index baf339dca5..933aad2966 100644
--- a/target/linux/brcm47xx/patches-3.3/820-wgt634u-nvram-fix.patch
+++ b/target/linux/brcm47xx/patches-3.3/820-wgt634u-nvram-fix.patch
@@ -280,7 +280,7 @@ out the configuration than the in kernel cfe config reader.
off = FLASH_MIN;
while (off <= lim) {
-@@ -252,6 +273,12 @@ int nvram_getenv(char *name, char *val,
+@@ -257,6 +278,12 @@ int nvram_getenv(char *name, char *val,
if (!nvram_buf[0])
early_nvram_init();
@@ -293,7 +293,7 @@ out the configuration than the in kernel cfe config reader.
/* Look for name=value and return value */
var = &nvram_buf[sizeof(struct nvram_header)];
end = nvram_buf + sizeof(nvram_buf) - 2;
-@@ -280,6 +307,9 @@ char *nvram_get(const char *name)
+@@ -285,6 +312,9 @@ char *nvram_get(const char *name)
if (!nvram_buf[0])
early_nvram_init();
--
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