From d7f1b59655efb5a285d227c8f9853a98eab5c2fd Mon Sep 17 00:00:00 2001
From: Hayes Wang <hayeswang@realtek.com>
Date: Wed, 22 Jan 2020 16:02:10 +0800
Subject: [PATCH] r8152: disable test IO for RTL8153B
Git-commit: d7f1b59655efb5a285d227c8f9853a98eab5c2fd
Patch-mainline: v5.5
References: git-fixes
For RTL8153B with QFN32, disable test IO. Otherwise, it may cause
abnormal behavior for the device randomly.
Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/net/usb/r8152.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -298,6 +298,7 @@
/* PLA_PHY_PWR */
#define TX_10M_IDLE_EN 0x0080
#define PFM_PWM_SWITCH 0x0040
+#define TEST_IO_OFF BIT(4)
/* PLA_MAC_PWR_CTRL */
#define D3_CLK_GATED_EN 0x00004000
@@ -4426,6 +4427,15 @@ static void r8153b_init(struct r8152 *tp
ocp_data &= ~PLA_MCU_SPDWN_EN;
ocp_write_word(tp, MCU_TYPE_PLA, PLA_MAC_PWR_CTRL3, ocp_data);
+ if (tp->version == RTL_VER_09) {
+ /* Disable Test IO for 32QFN */
+ if (ocp_read_byte(tp, MCU_TYPE_PLA, 0xdc00) & BIT(5)) {
+ ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR);
+ ocp_data |= TEST_IO_OFF;
+ ocp_write_word(tp, MCU_TYPE_PLA, PLA_PHY_PWR, ocp_data);
+ }
+ }
+
set_bit(GREEN_ETHERNET, &tp->flags);
/* rx aggregation */