diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-4.1/031-08-mips-bcm47xx-allow-retrieval-of-complete-nvram-conte.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-4.1/031-08-mips-bcm47xx-allow-retrieval-of-complete-nvram-conte.patch | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-4.1/031-08-mips-bcm47xx-allow-retrieval-of-complete-nvram-conte.patch b/target/linux/brcm47xx/patches-4.1/031-08-mips-bcm47xx-allow-retrieval-of-complete-nvram-conte.patch new file mode 100644 index 0000000..105c651 --- /dev/null +++ b/target/linux/brcm47xx/patches-4.1/031-08-mips-bcm47xx-allow-retrieval-of-complete-nvram-conte.patch @@ -0,0 +1,157 @@ +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(-) + +--- a/arch/mips/bcm47xx/nvram.c ++++ b/arch/mips/bcm47xx/nvram.c +@@ -94,17 +94,22 @@ static int nvram_find_and_copy(void __io + 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 *n + 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); +--- 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 + { + 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 */ |