bcm63xx: switch to upstream CFE detection patch

This patch has been merged in linux 5.9.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/target/linux/bcm63xx/patches-5.4/033-v5.9-mtd-parsers-bcm63xx-simplify-CFE-detection.patch b/target/linux/bcm63xx/patches-5.4/033-v5.9-mtd-parsers-bcm63xx-simplify-CFE-detection.patch
new file mode 100644
index 0000000000..ff1f30cb9b
--- /dev/null
+++ b/target/linux/bcm63xx/patches-5.4/033-v5.9-mtd-parsers-bcm63xx-simplify-CFE-detection.patch
@@ -0,0 +1,78 @@
+From 91e81150d38842b58133ce1a5d70c88e8f1cf7c1 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
+Date: Mon, 15 Jun 2020 11:17:40 +0200
+Subject: [PATCH] mtd: parsers: bcm63xx: simplify CFE detection
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Instead of trying to parse CFE version string, which is customized by some
+vendors, let's just check that "CFE1" was passed on argument 3.
+
+Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+Link: https://lore.kernel.org/linux-mtd/20200615091740.2958303-1-noltari@gmail.com
+---
+ drivers/mtd/parsers/bcm63xxpart.c | 32 ++++++++++++-------------------
+ 1 file changed, 12 insertions(+), 20 deletions(-)
+
+--- a/drivers/mtd/parsers/bcm63xxpart.c
++++ b/drivers/mtd/parsers/bcm63xxpart.c
+@@ -22,6 +22,11 @@
+ #include <linux/mtd/partitions.h>
+ #include <linux/of.h>
+ 
++#ifdef CONFIG_MIPS
++#include <asm/bootinfo.h>
++#include <asm/fw/cfe/cfe_api.h>
++#endif /* CONFIG_MIPS */
++
+ #define BCM963XX_CFE_BLOCK_SIZE		SZ_64K	/* always at least 64KiB */
+ 
+ #define BCM963XX_CFE_MAGIC_OFFSET	0x4e0
+@@ -32,28 +37,15 @@
+ #define STR_NULL_TERMINATE(x) \
+ 	do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
+ 
+-static int bcm63xx_detect_cfe(struct mtd_info *master)
++static inline int bcm63xx_detect_cfe(void)
+ {
+-	char buf[9];
+-	int ret;
+-	size_t retlen;
+-
+-	ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
+-		       (void *)buf);
+-	buf[retlen] = 0;
+-
+-	if (ret)
+-		return ret;
+-
+-	if (strncmp("cfe-v", buf, 5) == 0)
+-		return 0;
++	int ret = 0;
+ 
+-	/* very old CFE's do not have the cfe-v string, so check for magic */
+-	ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen,
+-		       (void *)buf);
+-	buf[retlen] = 0;
++#ifdef CONFIG_MIPS
++	ret = (fw_arg3 == CFE_EPTSEAL);
++#endif /* CONFIG_MIPS */
+ 
+-	return strncmp("CFE1CFE1", buf, 8);
++	return ret;
+ }
+ 
+ static int bcm63xx_read_nvram(struct mtd_info *master,
+@@ -138,7 +130,7 @@ static int bcm63xx_parse_cfe_partitions(
+ 	struct bcm963xx_nvram *nvram = NULL;
+ 	int ret;
+ 
+-	if (bcm63xx_detect_cfe(master))
++	if (!bcm63xx_detect_cfe())
+ 		return -EINVAL;
+ 
+ 	nvram = vzalloc(sizeof(*nvram));