diff options
| -rw-r--r-- | target/brcm/patches/nvram.patch | 145 |
1 files changed, 141 insertions, 4 deletions
diff --git a/target/brcm/patches/nvram.patch b/target/brcm/patches/nvram.patch index 6b8e307fa..aef378634 100644 --- a/target/brcm/patches/nvram.patch +++ b/target/brcm/patches/nvram.patch @@ -1,5 +1,3 @@ -diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile -index 35294b1..7465e8a 100644 --- a/arch/mips/bcm47xx/Makefile +++ b/arch/mips/bcm47xx/Makefile @@ -3,4 +3,4 @@ @@ -8,8 +6,107 @@ index 35294b1..7465e8a 100644 -obj-y := gpio.o irq.o prom.o serial.o setup.o time.o wgt634u.o +obj-y := gpio.o irq.o nvram.o prom.o serial.o setup.o time.o wgt634u.o -diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c -index d442e11..01e1661 100644 +--- /dev/null ++++ b/arch/mips/bcm47xx/nvram.c +@@ -0,0 +1,98 @@ ++/* ++ * BCM947xx nvram variable access ++ * ++ * Copyright 2005, Broadcom Corporation ++ * Copyright 2006, Felix Fietkau <nbd@openwrt.org> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ */ ++ ++#include <linux/init.h> ++#include <linux/module.h> ++#include <linux/ssb/ssb.h> ++#include <linux/kernel.h> ++#include <linux/string.h> ++#include <linux/interrupt.h> ++#include <linux/spinlock.h> ++#include <linux/slab.h> ++#include <asm/byteorder.h> ++#include <asm/bootinfo.h> ++#include <asm/addrspace.h> ++#include <asm/io.h> ++#include <asm/uaccess.h> ++#include <asm/mach-bcm47xx/nvram.h> ++#include <asm/mach-bcm47xx/bcm47xx.h> ++ ++static char nvram_buf[NVRAM_SPACE]; ++ ++/* Probe for NVRAM header */ ++static void __init early_nvram_init(void) ++{ ++ struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore; ++ struct nvram_header *header; ++ int i; ++ u32 base, lim, off; ++ u32 *src, *dst; ++ ++ base = mcore->flash_window; ++ lim = mcore->flash_window_size; ++ ++ off = 0x20000; ++ while (off <= lim) { ++ /* Windowed flash access */ ++ header = (struct nvram_header *) KSEG1ADDR(base + off - NVRAM_SPACE); ++ if (header->magic == NVRAM_HEADER) ++ goto found; ++ off <<= 1; ++ } ++ ++ /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */ ++ header = (struct nvram_header *) KSEG1ADDR(base + 4096); ++ if (header->magic == NVRAM_HEADER) ++ goto found; ++ ++ header = (struct nvram_header *) KSEG1ADDR(base + 1024); ++ if (header->magic == NVRAM_HEADER) ++ goto found; ++ ++ return; ++ ++found: ++ src = (u32 *) header; ++ dst = (u32 *) nvram_buf; ++ for (i = 0; i < sizeof(struct nvram_header); i += 4) ++ *dst++ = *src++; ++ for (; i < header->len && i < NVRAM_SPACE; i += 4) ++ *dst++ = le32_to_cpu(*src++); ++} ++ ++char *nvram_get(const char *name) ++{ ++ char *var, *value, *end, *eq; ++ ++ if (!name) ++ return NULL; ++ ++ if (!nvram_buf[0]) ++ early_nvram_init(); ++ ++ /* Look for name=value and return value */ ++ var = &nvram_buf[sizeof(struct nvram_header)]; ++ end = nvram_buf + sizeof(nvram_buf) - 2; ++ end[0] = end[1] = '\0'; ++ for (; *var; var = value + strlen(value) + 1) { ++ if (!(eq = strchr(var, '='))) ++ break; ++ value = eq + 1; ++ if ((eq - var) == strlen(name) && ++ strncmp(var, name, (eq - var)) == 0) ++ return value; ++ } ++ ++ return NULL; ++} ++ ++EXPORT_SYMBOL(nvram_get); --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -33,6 +33,7 @@ @@ -84,3 +181,43 @@ index d442e11..01e1661 100644 return 0; } +--- /dev/null ++++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h +@@ -0,0 +1,37 @@ ++/* ++ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> ++ * ++ * This program is free software; you can redistribute it and/or modify it ++ * under the terms of the GNU General Public License as published by the ++ * Free Software Foundation; either version 2 of the License, or (at your ++ * option) any later version. ++ */ ++ ++#ifndef __NVRAM_H ++#define __NVRAM_H ++ ++struct nvram_header { ++ u32 magic; ++ u32 len; ++ u32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */ ++ u32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */ ++ u32 config_ncdl; /* ncdl values for memc */ ++}; ++ ++struct nvram_tuple { ++ char *name; ++ char *value; ++ struct nvram_tuple *next; ++}; ++ ++#define NVRAM_HEADER 0x48534C46 /* 'FLSH' */ ++#define NVRAM_VERSION 1 ++#define NVRAM_HEADER_SIZE 20 ++#define NVRAM_SPACE 0x8000 ++ ++#define NVRAM_MAX_VALUE_LEN 255 ++#define NVRAM_MAX_PARAM_LEN 64 ++ ++char *nvram_get(const char *name); ++ ++#endif |