brcm47xx: add support for kernel 3.6

This is based on the patch by Peter Wagner.

SVN-Revision: 34252

1 files changed, 183 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.6/080-MIPS-BCM47XX-rewrite-nvram-probing.patch b/target/linux/brcm47xx/patches-3.6/080-MIPS-BCM47XX-rewrite-nvram-probing.patch
new file mode 100644
index 0000000..a271876
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.6/080-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;