--- /dev/null
+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
+
projects / openwrt / staging / wigyori.git / blobdiff