brcm63xx: add kernel 3.18 support

Add 3.18 support based on 3.18-rc6. Only netboot tested.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43461 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 120 insertions, 0 deletions

diff --git a/target/linux/brcm63xx/patches-3.18/417-MTD-bcm63xxpart-allow-passing-a-caldata-offset.patch b/target/linux/brcm63xx/patches-3.18/417-MTD-bcm63xxpart-allow-passing-a-caldata-offset.patch
new file mode 100644
index 0000000000..3b02c072cd
--- /dev/null
+++ b/target/linux/brcm63xx/patches-3.18/417-MTD-bcm63xxpart-allow-passing-a-caldata-offset.patch
@@ -0,0 +1,120 @@
+Allow bcm63xxpart to receive a caldata offset if calibration data is
+contained in flash.
+---
+ drivers/mtd/bcm63xxpart.c      |   51 ++++++++++++++++++++++++++++++++++++---
+ include/linux/mtd/partitions.h |    2 +
+ 2 files changed, 49 insertions(+), 4 deletions(-)
+
+--- a/drivers/mtd/bcm63xxpart.c
++++ b/drivers/mtd/bcm63xxpart.c
+@@ -53,10 +53,12 @@ static int bcm63xx_parse_cfe_partitions(
+ 	struct mtd_partition *parts;
+ 	int ret;
+ 	size_t retlen;
+-	unsigned int rootfsaddr, kerneladdr, spareaddr;
++	unsigned int rootfsaddr, kerneladdr, spareaddr, nvramaddr;
+ 	unsigned int rootfslen, kernellen, sparelen, totallen;
+ 	unsigned int cfelen, nvramlen;
+ 	unsigned int cfe_erasesize;
++	unsigned int caldatalen1 = 0, caldataaddr1 = 0;
++	unsigned int caldatalen2 = 0, caldataaddr2 = 0;
+ 	int i;
+ 	u32 computed_crc;
+ 	bool rootfs_first = false;
+@@ -70,6 +72,24 @@ static int bcm63xx_parse_cfe_partitions(
+ 	cfelen = cfe_erasesize;
+ 	nvramlen = bcm63xx_nvram_get_psi_size() * SZ_1K;
+ 	nvramlen = roundup(nvramlen, cfe_erasesize);
++	nvramaddr = master->size - nvramlen;
++
++	if (data) {
++		if (data->caldata[0]) {
++			caldatalen1 = cfe_erasesize;
++			caldataaddr1 = rounddown(data->caldata[0],
++						 cfe_erasesize);
++		}
++		if (data->caldata[1]) {
++			caldatalen2 = cfe_erasesize;
++			caldataaddr2 = rounddown(data->caldata[1],
++						 cfe_erasesize);
++		}
++		if (caldataaddr1 == caldataaddr2) {
++			caldataaddr2 = 0;
++			caldatalen2 = 0;
++		}
++	}
+ 
+ 	/* Allocate memory for buffer */
+ 	buf = vmalloc(sizeof(struct bcm_tag));
+@@ -121,7 +141,7 @@ static int bcm63xx_parse_cfe_partitions(
+ 		rootfsaddr = 0;
+ 		spareaddr = cfelen;
+ 	}
+-	sparelen = master->size - spareaddr - nvramlen;
++	sparelen = min_not_zero(nvramaddr, caldataaddr1) - spareaddr;
+ 
+ 	/* Determine number of partitions */
+ 	if (rootfslen > 0)
+@@ -130,6 +150,12 @@ static int bcm63xx_parse_cfe_partitions(
+ 	if (kernellen > 0)
+ 		nrparts++;
+ 
++	if (caldatalen1 > 0)
++		nrparts++;
++
++	if (caldatalen2 > 0)
++		nrparts++;
++
+ 	/* Ask kernel for more memory */
+ 	parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL);
+ 	if (!parts) {
+@@ -167,15 +193,32 @@ static int bcm63xx_parse_cfe_partitions(
+ 		curpart++;
+ 	}
+ 
++	if (caldatalen1 > 0) {
++		if (caldatalen2 > 0)
++			parts[curpart].name = "cal_data1";
++		else
++			parts[curpart].name = "cal_data";
++		parts[curpart].offset = caldataaddr1;
++		parts[curpart].size = caldatalen1;
++		curpart++;
++	}
++
++	if (caldatalen2 > 0) {
++		parts[curpart].name = "cal_data2";
++		parts[curpart].offset = caldataaddr2;
++		parts[curpart].size = caldatalen2;
++		curpart++;
++	}
++
+ 	parts[curpart].name = "nvram";
+-	parts[curpart].offset = master->size - nvramlen;
++	parts[curpart].offset = nvramaddr;
+ 	parts[curpart].size = nvramlen;
+ 	curpart++;
+ 
+ 	/* Global partition "linux" to make easy firmware upgrade */
+ 	parts[curpart].name = "linux";
+ 	parts[curpart].offset = cfelen;
+-	parts[curpart].size = master->size - cfelen - nvramlen;
++	parts[curpart].size = min_not_zero(nvramaddr, caldataaddr1) - cfelen;
+ 
+ 	for (i = 0; i < nrparts; i++)
+ 		pr_info("Partition %d is %s offset %llx and length %llx\n", i,
+--- a/include/linux/mtd/partitions.h
++++ b/include/linux/mtd/partitions.h
+@@ -56,10 +56,12 @@ struct device_node;
+ /**
+  * struct mtd_part_parser_data - used to pass data to MTD partition parsers.
+  * @origin: for RedBoot, start address of MTD device
++ * @caldata: for CFE, start address of wifi calibration data
+  * @of_node: for OF parsers, device node containing partitioning information
+  */
+ struct mtd_part_parser_data {
+ 	unsigned long origin;
++	unsigned long caldata[2];
+ 	struct device_node *of_node;
+ };
+