linux-kernel - [PATCH] r8152: Add support for MAC address pass through on RTL8153-BD

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Message-Id: <20190216091642.21388-1-david0813@gmail.com>
Date:   Sat, 16 Feb 2019 17:16:42 +0800
From:   David Chen <david0813@...il.com>
To:     linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net, hayeswang@...ltek.com,
        mario.limonciello@...l.com, bigeasy@...utronix.de,
        edumazet@...gle.com, jslaby@...e.cz, f.fainelli@...il.com,
        david.chen7@...l.com, kai.heng.feng@...onical.com,
        zhongjiang@...wei.com
Subject: [PATCH] r8152: Add support for MAC address pass through on RTL8153-BD

From: David Chen <david.chen7@...l.com>

RTL8153-BD is used in Dell DA300 type-C dongle.
It should be added to the whitelist of devices to activate MAC address
pass through.

Per confirming with Realtek all devices containing RTL8153-BD should
activate MAC pass through and there won't use pass through bit on efuse
like in RTL8153-AD.

Signed-off-by: David Chen <david.chen7@...l.com>
---
 drivers/net/usb/r8152.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 60dd1ec1665f..ada6baf8847a 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -557,6 +557,7 @@ enum spd_duplex {
 /* MAC PASSTHRU */
 #define AD_MASK			0xfee0
 #define BND_MASK		0x0004
+#define BD_MASK			0x0001
 #define EFUSE			0xcfdb
 #define PASS_THRU_MASK		0x1
 
@@ -1176,9 +1177,9 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa)
 			return -ENODEV;
 		}
 	} else {
-		/* test for RTL8153-BND */
+		/* test for RTL8153-BND and RTL8153-BD */
 		ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_MISC_1);
-		if ((ocp_data & BND_MASK) == 0) {
+		if ((ocp_data & BND_MASK) == 0 && (ocp_data & BD_MASK)) {
 			netif_dbg(tp, probe, tp->netdev,
 				  "Invalid variant for MAC pass through\n");
 			return -ENODEV;
-- 
2.19.1