release/5.2.38/r8152-avoid-the-MCU-to-clear-the-lanwake.patch

From 05ee3af747a7019e321a7b1d78dd9d61a4a8c31c Mon Sep 17 00:00:00 2001
From: Hayes Wang <hayeswang@realtek.com>
Date: Wed, 22 Jan 2020 16:02:12 +0800
Subject: [PATCH] r8152: avoid the MCU to clear the lanwake

commit 19813162895a696c5814d76e5f8fb6203d70f6e0 upstream.

Avoid the MCU to clear the lanwake after suspending. It may cause the
WOL fail. Disable LANWAKE_CLR_EN before suspending. Besides,enable it
and reset the lanwake status when resuming or initializing.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 700a0914288a..881be35eba8d 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -59,6 +59,7 @@
 #define PLA_LED_FEATURE		0xdd92
 #define PLA_PHYAR		0xde00
 #define PLA_BOOT_CTRL		0xe004
+#define PLA_LWAKE_CTRL_REG	0xe007
 #define PLA_GPHY_INTR_IMR	0xe022
 #define PLA_EEE_CR		0xe040
 #define PLA_EEEP_CR		0xe080
@@ -86,6 +87,7 @@
 #define PLA_TALLYCNT		0xe890
 #define PLA_SFF_STS_7		0xe8de
 #define PLA_PHYSTATUS		0xe908
+#define PLA_CONFIG6		0xe90a /* CONFIG6 */
 #define PLA_BP_BA		0xfc26
 #define PLA_BP_0		0xfc28
 #define PLA_BP_1		0xfc2a
@@ -282,6 +284,9 @@
 #define LINK_ON_WAKE_EN		0x0010
 #define LINK_OFF_WAKE_EN	0x0008
 
+/* PLA_CONFIG6 */
+#define LANWAKE_CLR_EN		BIT(0)
+
 /* PLA_CONFIG5 */
 #define BWF_EN			0x0040
 #define MWF_EN			0x0020
@@ -338,6 +343,9 @@
 /* PLA_BOOT_CTRL */
 #define AUTOLOAD_DONE		0x0002
 
+/* PLA_LWAKE_CTRL_REG */
+#define LANWAKE_PIN		BIT(7)
+
 /* USB_USB2PHY */
 #define USB2PHY_SUSPEND		0x0001
 #define USB2PHY_L1		0x0002
@@ -3716,6 +3724,8 @@ static void rtl8152_down(struct r8152 *tp)
 
 static void rtl8153_up(struct r8152 *tp)
 {
+	u32 ocp_data;
+
 	if (test_bit(RTL8152_UNPLUG, &tp->flags))
 		return;
 
@@ -3723,6 +3733,15 @@ static void rtl8153_up(struct r8152 *tp)
 	r8153_u2p3en(tp, false);
 	r8153_aldps_en(tp, false);
 	r8153_first_init(tp);
+
+	ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6);
+	ocp_data |= LANWAKE_CLR_EN;
+	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6, ocp_data);
+
+	ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_LWAKE_CTRL_REG);
+	ocp_data &= ~LANWAKE_PIN;
+	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_LWAKE_CTRL_REG, ocp_data);
+
 	r8153_aldps_en(tp, true);
 
 	switch (tp->version) {
@@ -3741,11 +3760,17 @@ static void rtl8153_up(struct r8152 *tp)
 
 static void rtl8153_down(struct r8152 *tp)
 {
+	u32 ocp_data;
+
 	if (test_bit(RTL8152_UNPLUG, &tp->flags)) {
 		rtl_drop_queued_tx(tp);
 		return;
 	}
 
+	ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6);
+	ocp_data &= ~LANWAKE_CLR_EN;
+	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6, ocp_data);
+
 	r8153_u1u2en(tp, false);
 	r8153_u2p3en(tp, false);
 	r8153_power_cut_en(tp, false);
@@ -4172,6 +4197,14 @@ static void r8153_init(struct r8152 *tp)
 	r8153_mac_clk_spd(tp, false);
 	usb_enable_lpm(tp->udev);
 
+	ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6);
+	ocp_data |= LANWAKE_CLR_EN;
+	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CONFIG6, ocp_data);
+
+	ocp_data = ocp_read_byte(tp, MCU_TYPE_PLA, PLA_LWAKE_CTRL_REG);
+	ocp_data &= ~LANWAKE_PIN;
+	ocp_write_byte(tp, MCU_TYPE_PLA, PLA_LWAKE_CTRL_REG, ocp_data);
+
 	/* rx aggregation */
 	ocp_data = ocp_read_word(tp, MCU_TYPE_USB, USB_USB_CTRL);
 	ocp_data &= ~(RX_AGG_DISABLE | RX_ZERO_EN);
-- 
2.7.4