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bcm47xx: make WGT634U NVRAM patch apply again

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Fixes: 1c48eee5b2 ("kernel: backport Broadcom NVRAM driver cleanups")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit 9530b9bb78)
This commit is contained in:
Rafał Miłecki 2021-03-12 21:08:24 +01:00
parent 20fe0e66f3
commit 761df5c4cf
1 changed files with 9 additions and 19 deletions
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28
target/linux/bcm47xx/patches-5.4/820-wgt634u-nvram-fix.patch
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@ -250,28 +250,18 @@ out the configuration than the in kernel cfe config reader.
+static int cfe_env;
+extern char *cfe_env_get(char *nv_buf, const char *name);
static u32 find_nvram_size(void __iomem *end)
{
@@ -52,7 +54,9 @@ static u32 find_nvram_size(void __iomem
static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
{
struct nvram_header __iomem *header;
+ int i;
u32 off;
+ u32 *src, *dst;
u32 size;
if (nvram_len) {
@@ -60,6 +64,26 @@ static int nvram_find_and_copy(void __io
/**
* bcm47xx_nvram_is_valid - check for a valid NVRAM at specified memory
@@ -80,6 +82,26 @@ static int bcm47xx_nvram_find_and_copy(v
return -EEXIST;
}
+ cfe_env = 0;
+
+ /* XXX: hack for supporting the CFE environment stuff on WGT634U */
+ if (lim >= 8 * 1024 * 1024) {
+ src = (u32 *)(iobase + 8 * 1024 * 1024 - 0x2000);
+ dst = (u32 *)nvram_buf;
+ if (res_size >= 8 * 1024 * 1024) {
+ u32 *src = (u32 *)(flash_start + 8 * 1024 * 1024 - 0x2000);
+ u32 *dst = (u32 *)nvram_buf;
+
+ if ((*src & 0xff00ff) == 0x000001) {
+ printk("early_nvram_init: WGT634U NVRAM found.\n");
@ -287,9 +277,9 @@ out the configuration than the in kernel cfe config reader.
+ }
+
/* TODO: when nvram is on nand flash check for bad blocks first. */
off = FLASH_MIN;
while (off <= lim) {
@@ -170,6 +194,13 @@ int bcm47xx_nvram_getenv(const char *nam
/* Try every possible flash size and check for NVRAM at its end */
@@ -172,6 +194,13 @@ int bcm47xx_nvram_getenv(const char *nam
if (!name)
return -EINVAL;