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-rw-r--r--target/linux/brcm47xx/patches-3.3/080-MIPS-BCM47XX-rewrite-nvram-probing.patch183
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;