linux-kernel - [PATCH] MIPS: BCM63xx: improve CFE version detection

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Date:   Mon,  8 Jun 2020 11:28:35 +0200
From:   Álvaro Fernández Rojas 
        <noltari@...il.com>
To:     tsbogend@...ha.franken.de, f.fainelli@...il.com,
        jonas.gorski@...il.com, bcm-kernel-feedback-list@...adcom.com,
        linux-mips@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     Álvaro Fernández Rojas 
        <noltari@...il.com>
Subject: [PATCH] MIPS: BCM63xx: improve CFE version detection

There are some CFE variants that start with 'cfe-vd' instead of 'cfe-v', such
as the one used in the Huawei HG556a: "cfe-vd081.5003". In this case, the CFE
version is stored as is (string vs number bytes).

Some newer devices have an additional version number, such as the Comtrend
VR-3032u: "1.0.38-112.118-11".

Finally, print the string as is if the version doesn't start with "cfe-v" or
"cfe-vd", but starts with "cfe-".

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 arch/mips/bcm63xx/boards/board_bcm963xx.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/arch/mips/bcm63xx/boards/board_bcm963xx.c b/arch/mips/bcm63xx/boards/board_bcm963xx.c
index 36ec3dc2c999..38f812383998 100644
--- a/arch/mips/bcm63xx/boards/board_bcm963xx.c
+++ b/arch/mips/bcm63xx/boards/board_bcm963xx.c
@@ -763,11 +763,25 @@ void __init board_prom_init(void)
 
 	/* dump cfe version */
 	cfe = boot_addr + BCM963XX_CFE_VERSION_OFFSET;
-	if (!memcmp(cfe, "cfe-v", 5))
-		snprintf(cfe_version, sizeof(cfe_version), "%u.%u.%u-%u.%u",
-			 cfe[5], cfe[6], cfe[7], cfe[8], cfe[9]);
-	else
+	if (strstarts(cfe, "cfe-")) {
+		if(cfe[4] == 'v') {
+			if(cfe[5] == 'd')
+				snprintf(cfe_version, 11, "%s",
+					 (char *) &cfe[5]);
+			else if (cfe[10] > 0)
+				snprintf(cfe_version, sizeof(cfe_version),
+					 "%u.%u.%u-%u.%u-%u", cfe[5], cfe[6],
+					 cfe[7], cfe[8], cfe[9], cfe[10]);
+			else
+				snprintf(cfe_version, sizeof(cfe_version),
+					 "%u.%u.%u-%u.%u", cfe[5], cfe[6],
+					 cfe[7], cfe[8], cfe[9]);
+		} else {
+			snprintf(cfe_version, 12, "%s", (char *) &cfe[4]);
+		}
+	} else {
 		strcpy(cfe_version, "unknown");
+	}
 	pr_info("CFE version: %s\n", cfe_version);
 
 	bcm63xx_nvram_init(boot_addr + BCM963XX_NVRAM_OFFSET);
-- 
2.26.2