diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch b/target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch new file mode 100644 index 0000000000..a271876fa9 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch @@ -0,0 +1,183 @@ +--- a/arch/mips/bcm47xx/nvram.c ++++ b/arch/mips/bcm47xx/nvram.c +@@ -3,7 +3,7 @@ + * + * Copyright (C) 2005 Broadcom Corporation + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> +- * Copyright (C) 2010-2011 Hauke Mehrtens <hauke@hauke-m.de> ++ * 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 +@@ -23,69 +23,139 @@ + + 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 void early_nvram_init(void) ++static void early_nvram_init_fill(u32 base, u32 lim) + { +-#ifdef CONFIG_BCM47XX_SSB +- struct ssb_mipscore *mcore_ssb; +-#endif +-#ifdef CONFIG_BCM47XX_BCMA +- struct bcma_drv_cc *bcma_cc; +-#endif + struct nvram_header *header; + int i; +- u32 base = 0; +- u32 lim = 0; + u32 off; + u32 *src, *dst; ++ u32 size; + +- switch (bcm47xx_bus_type) { +-#ifdef CONFIG_BCM47XX_SSB +- case BCM47XX_BUS_TYPE_SSB: +- mcore_ssb = &bcm47xx_bus.ssb.mipscore; +- base = mcore_ssb->pflash.window; +- lim = mcore_ssb->pflash.window_size; +- break; +-#endif +-#ifdef CONFIG_BCM47XX_BCMA +- case BCM47XX_BUS_TYPE_BCMA: +- bcma_cc = &bcm47xx_bus.bcma.bus.drv_cc; +- base = bcma_cc->pflash.window; +- lim = bcma_cc->pflash.window_size; +- break; +-#endif +- } +- ++ /* TODO: when nvram is on nand flash check for bad blocks first. */ + off = FLASH_MIN; + while (off <= lim) { + /* Windowed flash access */ +- header = (struct nvram_header *) +- KSEG1ADDR(base + off - NVRAM_SPACE); +- if (header->magic == NVRAM_HEADER) ++ 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) ++ if (header->magic == NVRAM_HEADER) { ++ size = NVRAM_SPACE; + goto found; ++ } + + header = (struct nvram_header *) KSEG1ADDR(base + 1024); +- if (header->magic == NVRAM_HEADER) ++ if (header->magic == NVRAM_HEADER) { ++ size = NVRAM_SPACE; + goto found; ++ } + ++ pr_err("no nvram found\n"); + return; + + 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 += 4) ++ for (; i < header->len && i < NVRAM_SPACE && i < size; i += 4) + *dst++ = le32_to_cpu(*src++); + } + ++#ifdef CONFIG_BCM47XX_BCMA ++static void early_nvram_init_bcma(void) ++{ ++ struct bcma_drv_cc *cc = &bcm47xx_bus.bcma.bus.drv_cc; ++ u32 base = 0; ++ u32 lim = 0; ++ ++ if (cc->nflash.boot) { ++ base = BCMA_SOC_FLASH1; ++ lim = BCMA_SOC_FLASH1_SZ; ++ } else if (cc->pflash.present) { ++ base = cc->pflash.window; ++ lim = cc->pflash.window_size; ++ } else if (cc->sflash.present) { ++ base = cc->sflash.window; ++ lim = cc->sflash.size; ++ } else { ++ pr_err("No supported flash found\n"); ++ return; ++ } ++ ++ early_nvram_init_fill(base, lim); ++} ++#endif ++ ++#ifdef CONFIG_BCM47XX_SSB ++static void early_nvram_init_ssb(void) ++{ ++ struct ssb_mipscore *mcore = &bcm47xx_bus.ssb.mipscore; ++ struct ssb_chipcommon *chipco = &bcm47xx_bus.ssb.chipco; ++ u32 base = 0; ++ u32 lim = 0; ++ ++ if (mcore->pflash.present) { ++ base = mcore->pflash.window; ++ lim = mcore->pflash.window_size; ++ } else if (chipco->sflash.present) { ++ base = chipco->sflash.window; ++ lim = chipco->sflash.size; ++ } else { ++ pr_err("No supported flash found\n"); ++ return; ++ } ++ ++ early_nvram_init_fill(base, lim); ++} ++#endif ++ ++static void early_nvram_init(void) ++{ ++ switch (bcm47xx_bus_type) { ++#ifdef CONFIG_BCM47XX_SSB ++ case BCM47XX_BUS_TYPE_SSB: ++ early_nvram_init_ssb(); ++ break; ++#endif ++#ifdef CONFIG_BCM47XX_BCMA ++ case BCM47XX_BUS_TYPE_BCMA: ++ early_nvram_init_bcma(); ++ break; ++#endif ++ } ++} ++ + int nvram_getenv(char *name, char *val, size_t val_len) + { + char *var, *value, *end, *eq; |