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From 8ab86c5dc38ad4de1442e50e0adbc354d9184d71 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Tue, 1 May 2012 14:38:41 +0200
Subject: [PATCH 68/79] MTD: bcm63xxpart: allow passing a caldata offset
Allow bcm63xxpart to receive a caldata offset if calibration data is
contained in flash.
---
drivers/mtd/bcm63xxpart.c | 47 ++++++++++++++++++++++++++++++++++++++--
include/linux/mtd/partitions.h | 2 ++
2 files changed, 47 insertions(+), 2 deletions(-)
--- a/drivers/mtd/bcm63xxpart.c
+++ b/drivers/mtd/bcm63xxpart.c
@@ -80,6 +80,8 @@ static int bcm63xx_parse_cfe_partitions(
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;
@@ -94,6 +96,23 @@ static int bcm63xx_parse_cfe_partitions(
nvramlen = bcm63xx_nvram_get_psi_size() * 1024;
nvramlen = roundup(nvramlen, cfe_erasesize);
+ 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));
if (!buf)
@@ -144,7 +163,7 @@ static int bcm63xx_parse_cfe_partitions(
rootfsaddr = 0;
spareaddr = cfelen;
}
- sparelen = master->size - spareaddr - nvramlen;
+ sparelen = master->size - spareaddr - nvramlen - caldatalen1 - caldatalen2;
/* Determine number of partitions */
if (rootfslen > 0)
@@ -153,6 +172,12 @@ 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) {
@@ -190,6 +215,23 @@ 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].size = nvramlen;
@@ -198,7 +240,8 @@ static int bcm63xx_parse_cfe_partitions(
/* 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 = master->size - cfelen - nvramlen
+ - caldatalen1 - caldatalen2;
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
@@ -58,10 +58,12 @@ 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;
};
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