diff options
Diffstat (limited to 'arch/mips/bcm47xx/nvram.c')
| -rw-r--r-- | arch/mips/bcm47xx/nvram.c | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c deleted file mode 100644 index cc40b74940f5..000000000000 --- a/arch/mips/bcm47xx/nvram.c +++ /dev/null @@ -1,192 +0,0 @@ -/* - * BCM947xx nvram variable access - * - * Copyright (C) 2005 Broadcom Corporation - * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> - * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de> - * - * 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/types.h> -#include <linux/module.h> -#include <linux/ssb/ssb.h> -#include <linux/kernel.h> -#include <linux/string.h> -#include <asm/addrspace.h> -#include <bcm47xx_nvram.h> -#include <asm/mach-bcm47xx/bcm47xx.h> - -static char nvram_buf[NVRAM_SPACE]; - -static u32 find_nvram_size(u32 end) -{ - struct nvram_header *header; - u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000}; - int i; - - for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) { - header = (struct nvram_header *)KSEG1ADDR(end - nvram_sizes[i]); - if (header->magic == NVRAM_HEADER) - return nvram_sizes[i]; - } - - return 0; -} - -/* Probe for NVRAM header */ -static int nvram_find_and_copy(u32 base, u32 lim) -{ - struct nvram_header *header; - int i; - u32 off; - u32 *src, *dst; - u32 size; - - /* TODO: when nvram is on nand flash check for bad blocks first. */ - off = FLASH_MIN; - while (off <= lim) { - /* Windowed flash access */ - size = find_nvram_size(base + off); - if (size) { - header = (struct nvram_header *)KSEG1ADDR(base + off - - size); - 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) { - size = NVRAM_SPACE; - goto found; - } - - header = (struct nvram_header *) KSEG1ADDR(base + 1024); - if (header->magic == NVRAM_HEADER) { - size = NVRAM_SPACE; - goto found; - } - - pr_err("no nvram found\n"); - 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); - - 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 < size; i += 4) - *dst++ = le32_to_cpu(*src++); - memset(dst, 0x0, NVRAM_SPACE - i); - - return 0; -} - -#ifdef CONFIG_BCM47XX_SSB -static int nvram_init_ssb(void) -{ - struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore; - u32 base; - u32 lim; - - if (mcore->pflash.present) { - base = mcore->pflash.window; - lim = mcore->pflash.window_size; - } else { - pr_err("Couldn't find supported flash memory\n"); - return -ENXIO; - } - - return nvram_find_and_copy(base, lim); -} -#endif - -#ifdef CONFIG_BCM47XX_BCMA -static int nvram_init_bcma(void) -{ - struct bcma_drv_cc *cc = &bcm47xx_bus.bcma.bus.drv_cc; - u32 base; - u32 lim; - -#ifdef CONFIG_BCMA_NFLASH - if (cc->nflash.boot) { - base = BCMA_SOC_FLASH1; - lim = BCMA_SOC_FLASH1_SZ; - } else -#endif - if (cc->pflash.present) { - base = cc->pflash.window; - lim = cc->pflash.window_size; -#ifdef CONFIG_BCMA_SFLASH - } else if (cc->sflash.present) { - base = cc->sflash.window; - lim = cc->sflash.size; -#endif - } else { - pr_err("Couldn't find supported flash memory\n"); - return -ENXIO; - } - - return nvram_find_and_copy(base, lim); -} -#endif - -static int nvram_init(void) -{ - switch (bcm47xx_bus_type) { -#ifdef CONFIG_BCM47XX_SSB - case BCM47XX_BUS_TYPE_SSB: - return nvram_init_ssb(); -#endif -#ifdef CONFIG_BCM47XX_BCMA - case BCM47XX_BUS_TYPE_BCMA: - return nvram_init_bcma(); -#endif - } - return -ENXIO; -} - -int bcm47xx_nvram_getenv(char *name, char *val, size_t val_len) -{ - char *var, *value, *end, *eq; - int err; - - if (!name) - return -EINVAL; - - if (!nvram_buf[0]) { - err = nvram_init(); - if (err) - return err; - } - - /* 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) { - return snprintf(val, val_len, "%s", value); - } - } - return -ENOENT; -} -EXPORT_SYMBOL(bcm47xx_nvram_getenv); |