diff --git a/arch/mips/bcm47xx/Makefile b/arch/mips/bcm47xx/Makefile index 35294b12d638..7465e8a72d9a 100644 --- a/arch/mips/bcm47xx/Makefile +++ b/arch/mips/bcm47xx/Makefile @@ -3,4 +3,4 @@ # under Linux. # -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/nvram.c b/arch/mips/bcm47xx/nvram.c new file mode 100644 index 000000000000..06e03b222f6d --- /dev/null +++ b/arch/mips/bcm47xx/nvram.c @@ -0,0 +1,94 @@ +/* + * BCM947xx nvram variable access + * + * Copyright (C) 2005 Broadcom Corporation + * Copyright (C) 2006 Felix Fietkau + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +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 = FLASH_MIN; + 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++); +} + +int nvram_getenv(char *name, char *val, size_t val_len) +{ + char *var, *value, *end, *eq; + + if (!name) + return 1; + + 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) { + eq = strchr(var, '='); + if (!eq) + break; + value = eq + 1; + if ((eq - var) == strlen(name) && + strncmp(var, name, (eq - var)) == 0) { + snprintf(val, val_len, "%s", value); + return 0; + } + } + return 1; +} +EXPORT_SYMBOL(nvram_getenv); diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index d442e11625fa..b1aee33efd11 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -1,8 +1,8 @@ /* * Copyright (C) 2004 Florian Schirmer - * Copyright (C) 2005 Waldemar Brodkorb * Copyright (C) 2006 Felix Fietkau * Copyright (C) 2006 Michael Buesch + * Copyright (C) 2010 Waldemar Brodkorb * * 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 @@ -33,6 +33,7 @@ #include #include #include +#include struct ssb_bus ssb_bcm47xx; EXPORT_SYMBOL(ssb_bcm47xx); @@ -81,28 +82,42 @@ static int bcm47xx_get_invariants(struct ssb_bus *bus, /* Fill boardinfo structure */ memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); - if (cfe_getenv("boardvendor", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardvendor", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardvendor", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardtype", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardtype", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardrev", buf, sizeof(buf)) >= 0) + if (cfe_getenv("boardrev", buf, sizeof(buf)) >= 0 || + nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) iv->boardinfo.rev = (u16)simple_strtoul(buf, NULL, 0); /* Fill sprom structure */ memset(&(iv->sprom), 0, sizeof(struct ssb_sprom)); iv->sprom.revision = 3; - if (cfe_getenv("et0macaddr", buf, sizeof(buf)) >= 0) + if (cfe_getenv("et0macaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et0mac); - if (cfe_getenv("et1macaddr", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et1macaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et1mac); - if (cfe_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et0mdcport", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et0phyaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) + iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 0); + + if (cfe_getenv("et1phyaddr", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) + iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 0); + + if (cfe_getenv("et0mdcport", buf, sizeof(buf)) >= 0 || + nvram_getenv("et0mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et0mdcport = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et1mdcport", buf, sizeof(buf)) >= 0) + + if (cfe_getenv("et1mdcport", buf, sizeof(buf)) >= 0 || + nvram_getenv("et1mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et1mdcport = simple_strtoul(buf, NULL, 10); return 0; diff --git a/arch/mips/include/asm/mach-bcm47xx/nvram.h b/arch/mips/include/asm/mach-bcm47xx/nvram.h new file mode 100644 index 000000000000..0d8cc146f7a4 --- /dev/null +++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) 2005, Broadcom Corporation + * Copyright (C) 2006, Felix Fietkau + * + * 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 + +#include + +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 */ +}; + +#define NVRAM_HEADER 0x48534C46 /* 'FLSH' */ +#define NVRAM_VERSION 1 +#define NVRAM_HEADER_SIZE 20 +#define NVRAM_SPACE 0x8000 + +#define FLASH_MIN 0x00020000 /* Minimum flash size */ + +#define NVRAM_MAX_VALUE_LEN 255 +#define NVRAM_MAX_PARAM_LEN 64 + +extern int nvram_getenv(char *name, char *val, size_t val_len); + +#endif