You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
165 lines
5.1 KiB
Diff
165 lines
5.1 KiB
Diff
From 2536295c2aeafc769215a6b2883126fa94c90b9a Mon Sep 17 00:00:00 2001
|
|
From: Hante Meuleman <meuleman@broadcom.com>
|
|
Date: Thu, 21 May 2015 15:27:23 +0200
|
|
Subject: [PATCH] mips: bcm47xx: allow retrieval of complete nvram contents
|
|
|
|
Host platforms such as routers supported by OpenWrt can
|
|
support NVRAM reading directly from internal NVRAM store.
|
|
The brcmfmac for one requires the complete nvram contents
|
|
to select what needs to be sent to wireless device.
|
|
|
|
Signed-off-by: Arend van Spriel <arend@broadcom.com>
|
|
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
|
|
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
|
|
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
|
|
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
|
|
Reviewed-by: Daniel (Deognyoun) Kim <dekim@broadcom.com>
|
|
Cc: linux-mips@linux-mips.org
|
|
Patchwork: https://patchwork.linux-mips.org/patch/10093/
|
|
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
|
|
---
|
|
arch/mips/bcm47xx/nvram.c | 60 ++++++++++++++++++++++++++++++++-----------
|
|
include/linux/bcm47xx_nvram.h | 15 +++++++++++
|
|
2 files changed, 60 insertions(+), 15 deletions(-)
|
|
|
|
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c
|
|
index 95d028c..2ed762e 100644
|
|
--- a/arch/mips/bcm47xx/nvram.c
|
|
+++ b/arch/mips/bcm47xx/nvram.c
|
|
@@ -94,17 +94,22 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
|
|
return -ENXIO;
|
|
|
|
found:
|
|
- if (header->len > size)
|
|
- pr_err("The nvram size accoridng to the header seems to be bigger than the partition on flash\n");
|
|
- if (header->len > NVRAM_SPACE)
|
|
- pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
|
|
- header->len, NVRAM_SPACE - 1);
|
|
-
|
|
src = (u32 *)header;
|
|
dst = (u32 *)nvram_buf;
|
|
for (i = 0; i < sizeof(struct nvram_header); i += 4)
|
|
*dst++ = __raw_readl(src++);
|
|
- for (; i < header->len && i < NVRAM_SPACE && i < size; i += 4)
|
|
+ header = (struct nvram_header *)nvram_buf;
|
|
+ if (header->len > size) {
|
|
+ pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
|
|
+ header->len = size;
|
|
+ }
|
|
+ if (header->len >= NVRAM_SPACE) {
|
|
+ pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
|
|
+ header->len, NVRAM_SPACE - 1);
|
|
+ header->len = NVRAM_SPACE - 1;
|
|
+ }
|
|
+ /* proceed reading data after header */
|
|
+ for (; i < header->len; i += 4)
|
|
*dst++ = readl(src++);
|
|
nvram_buf[NVRAM_SPACE - 1] = '\0';
|
|
|
|
@@ -139,6 +144,7 @@ static int nvram_init(void)
|
|
#ifdef CONFIG_MTD
|
|
struct mtd_info *mtd;
|
|
struct nvram_header header;
|
|
+ struct nvram_header *pheader;
|
|
size_t bytes_read;
|
|
int err;
|
|
|
|
@@ -147,20 +153,21 @@ static int nvram_init(void)
|
|
return -ENODEV;
|
|
|
|
err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
|
|
- if (!err && header.magic == NVRAM_MAGIC) {
|
|
- u8 *dst = (uint8_t *)nvram_buf;
|
|
- size_t len = header.len;
|
|
-
|
|
- if (len >= NVRAM_SPACE) {
|
|
- len = NVRAM_SPACE - 1;
|
|
+ if (!err && header.magic == NVRAM_MAGIC &&
|
|
+ header.len > sizeof(header)) {
|
|
+ if (header.len >= NVRAM_SPACE) {
|
|
pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
|
|
- header.len, len);
|
|
+ header.len, NVRAM_SPACE);
|
|
+ header.len = NVRAM_SPACE - 1;
|
|
}
|
|
|
|
- err = mtd_read(mtd, 0, len, &bytes_read, dst);
|
|
+ err = mtd_read(mtd, 0, header.len, &bytes_read,
|
|
+ (u8 *)nvram_buf);
|
|
if (err)
|
|
return err;
|
|
|
|
+ pheader = (struct nvram_header *)nvram_buf;
|
|
+ pheader->len = header.len;
|
|
return 0;
|
|
}
|
|
#endif
|
|
@@ -219,3 +226,26 @@ int bcm47xx_nvram_gpio_pin(const char *name)
|
|
return -ENOENT;
|
|
}
|
|
EXPORT_SYMBOL(bcm47xx_nvram_gpio_pin);
|
|
+
|
|
+char *bcm47xx_nvram_get_contents(size_t *nvram_size)
|
|
+{
|
|
+ int err;
|
|
+ char *nvram;
|
|
+ struct nvram_header *header;
|
|
+
|
|
+ if (!nvram_buf[0]) {
|
|
+ err = nvram_init();
|
|
+ if (err)
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ header = (struct nvram_header *)nvram_buf;
|
|
+ *nvram_size = header->len - sizeof(struct nvram_header);
|
|
+ nvram = vmalloc(*nvram_size);
|
|
+ if (!nvram)
|
|
+ return NULL;
|
|
+ memcpy(nvram, &nvram_buf[sizeof(struct nvram_header)], *nvram_size);
|
|
+
|
|
+ return nvram;
|
|
+}
|
|
+EXPORT_SYMBOL(bcm47xx_nvram_get_contents);
|
|
diff --git a/include/linux/bcm47xx_nvram.h b/include/linux/bcm47xx_nvram.h
|
|
index b12b07e..c73927c 100644
|
|
--- a/include/linux/bcm47xx_nvram.h
|
|
+++ b/include/linux/bcm47xx_nvram.h
|
|
@@ -10,11 +10,17 @@
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
+#include <linux/vmalloc.h>
|
|
|
|
#ifdef CONFIG_BCM47XX
|
|
int bcm47xx_nvram_init_from_mem(u32 base, u32 lim);
|
|
int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len);
|
|
int bcm47xx_nvram_gpio_pin(const char *name);
|
|
+char *bcm47xx_nvram_get_contents(size_t *val_len);
|
|
+static inline void bcm47xx_nvram_release_contents(char *nvram)
|
|
+{
|
|
+ vfree(nvram);
|
|
+};
|
|
#else
|
|
static inline int bcm47xx_nvram_init_from_mem(u32 base, u32 lim)
|
|
{
|
|
@@ -29,6 +35,15 @@ static inline int bcm47xx_nvram_gpio_pin(const char *name)
|
|
{
|
|
return -ENOTSUPP;
|
|
};
|
|
+
|
|
+static inline char *bcm47xx_nvram_get_contents(size_t *val_len)
|
|
+{
|
|
+ return NULL;
|
|
+};
|
|
+
|
|
+static inline void bcm47xx_nvram_release_contents(char *nvram)
|
|
+{
|
|
+};
|
|
#endif
|
|
|
|
#endif /* __BCM47XX_NVRAM_H */
|
|
--
|
|
1.8.4.5
|
|
|