a5a0b3f1d0
This patch has been merged in linux 5.9. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
79 lines
2.3 KiB
Diff
79 lines
2.3 KiB
Diff
From 91e81150d38842b58133ce1a5d70c88e8f1cf7c1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= <noltari@gmail.com>
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Date: Mon, 15 Jun 2020 11:17:40 +0200
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Subject: [PATCH] mtd: parsers: bcm63xx: simplify CFE detection
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Instead of trying to parse CFE version string, which is customized by some
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vendors, let's just check that "CFE1" was passed on argument 3.
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Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
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Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
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Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
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Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Link: https://lore.kernel.org/linux-mtd/20200615091740.2958303-1-noltari@gmail.com
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---
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drivers/mtd/parsers/bcm63xxpart.c | 32 ++++++++++++-------------------
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1 file changed, 12 insertions(+), 20 deletions(-)
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--- a/drivers/mtd/parsers/bcm63xxpart.c
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+++ b/drivers/mtd/parsers/bcm63xxpart.c
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@@ -22,6 +22,11 @@
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#include <linux/mtd/partitions.h>
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#include <linux/of.h>
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+#ifdef CONFIG_MIPS
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+#include <asm/bootinfo.h>
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+#include <asm/fw/cfe/cfe_api.h>
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+#endif /* CONFIG_MIPS */
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+
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#define BCM963XX_CFE_BLOCK_SIZE SZ_64K /* always at least 64KiB */
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#define BCM963XX_CFE_MAGIC_OFFSET 0x4e0
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@@ -32,28 +37,15 @@
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#define STR_NULL_TERMINATE(x) \
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do { char *_str = (x); _str[sizeof(x) - 1] = 0; } while (0)
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-static int bcm63xx_detect_cfe(struct mtd_info *master)
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+static inline int bcm63xx_detect_cfe(void)
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{
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- char buf[9];
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- int ret;
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- size_t retlen;
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-
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- ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
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- (void *)buf);
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- buf[retlen] = 0;
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-
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- if (ret)
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- return ret;
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-
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- if (strncmp("cfe-v", buf, 5) == 0)
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- return 0;
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+ int ret = 0;
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- /* very old CFE's do not have the cfe-v string, so check for magic */
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- ret = mtd_read(master, BCM963XX_CFE_MAGIC_OFFSET, 8, &retlen,
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- (void *)buf);
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- buf[retlen] = 0;
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+#ifdef CONFIG_MIPS
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+ ret = (fw_arg3 == CFE_EPTSEAL);
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+#endif /* CONFIG_MIPS */
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- return strncmp("CFE1CFE1", buf, 8);
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+ return ret;
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}
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static int bcm63xx_read_nvram(struct mtd_info *master,
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@@ -138,7 +130,7 @@ static int bcm63xx_parse_cfe_partitions(
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struct bcm963xx_nvram *nvram = NULL;
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int ret;
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- if (bcm63xx_detect_cfe(master))
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+ if (!bcm63xx_detect_cfe())
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return -EINVAL;
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nvram = vzalloc(sizeof(*nvram));
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