lkml.org 
[lkml]   [2020]   [Jun]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4] mtd: parsers: bcm63xx: simplify CFE detection
Date
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>
---
v4: shorten conditional compilation part as suggested by Miquèl.
v3: keep COMPILE_TEST compatibility by adding a new function that only checks
fw_arg3 when CONFIG_MIPS is defined.
v2: use CFE_EPTSEAL definition and avoid using an additional function.

drivers/mtd/parsers/bcm63xxpart.c | 32 ++++++++++++-------------------
1 file changed, 12 insertions(+), 20 deletions(-)

diff --git a/drivers/mtd/parsers/bcm63xxpart.c b/drivers/mtd/parsers/bcm63xxpart.c
index 78f90c6c18fd..b15bdadaedb5 100644
--- 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;
+ int ret = 0;

- ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen,
- (void *)buf);
- buf[retlen] = 0;
+#ifdef CONFIG_MIPS
+ ret = (fw_arg3 == CFE_EPTSEAL);
+#endif /* CONFIG_MIPS */

- if (ret)
- return ret;
-
- if (strncmp("cfe-v", buf, 5) == 0)
- return 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;
-
- 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 mtd_info *master,
struct bcm963xx_nvram *nvram = NULL;
int ret;

- if (bcm63xx_detect_cfe(master))
+ if (!bcm63xx_detect_cfe())
return -EINVAL;

nvram = vzalloc(sizeof(*nvram));
--
2.27.0
\
 
 \ /
  Last update: 2020-06-15 11:18    [W:0.260 / U:0.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site