netdev - [PATCH 2/2] r8169: reinstate internal ASPM and clock request settings

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Date:   Wed, 15 Nov 2017 04:00:19 -0500
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     nic_swsd@...ltek.com
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Francois Romieu <romieu@...zoreil.com>,
        Hayes Wang <hayeswang@...ltek.com>,
        Jörg Otte <jrg.otte@...il.com>
Subject: [PATCH 2/2] r8169: reinstate internal ASPM and clock request settings

Commit ("r8169: enable internal ASPM and clock request settings") caused
a regression on RTL8168evl/8111evl [1], so it got reverted.

Instead of reverting the whole commit, let's reinstate ASPM for all
models other than RTL8168evl/8111evl.

[1] https://lkml.org/lkml/2013/1/5/36

Cc: Francois Romieu <romieu@...zoreil.com>
Cc: Hayes Wang <hayeswang@...ltek.com>
Cc: Jörg Otte <jrg.otte@...il.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
 drivers/net/ethernet/realtek/r8169.c | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 54bb9b15d541..6d6f3079320a 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -510,6 +510,7 @@ enum rtl8168_registers {
 #define PWM_EN				(1 << 22)
 #define RXDV_GATED_EN			(1 << 19)
 #define EARLY_TALLY_EN			(1 << 16)
+#define FORCE_CLK			(1 << 15) /* force clock request */
 };
 
 enum rtl_register_content {
@@ -5992,6 +5993,11 @@ static void rtl_hw_start_8168e_2(struct rtl8169_private *tp)
 
 	RTL_W8(DLLPR, RTL_R8(DLLPR) | PFM_EN);
 	RTL_W32(MISC, RTL_R32(MISC) | PWM_EN);
+
+	/* Don't enable ASPM for RTL8168evl/8111evl.
+	 * https://lkml.org/lkml/2013/1/5/36
+	 */
+
 	RTL_W8(Config5, RTL_R8(Config5) & ~Spi_en);
 }
 
@@ -6017,13 +6023,12 @@ static void rtl_hw_start_8168f(struct rtl8169_private *tp)
 
 	RTL_W8(MaxTxPacketSize, EarlySize);
 
-	rtl_disable_clock_request(pdev);
-
 	RTL_W32(TxConfig, RTL_R32(TxConfig) | TXCFG_AUTO_FIFO);
 	RTL_W8(MCU, RTL_R8(MCU) & ~NOW_IS_OOB);
 	RTL_W8(DLLPR, RTL_R8(DLLPR) | PFM_EN);
-	RTL_W32(MISC, RTL_R32(MISC) | PWM_EN);
-	RTL_W8(Config5, RTL_R8(Config5) & ~Spi_en);
+	RTL_W32(MISC, RTL_R32(MISC) | PWM_EN | FORCE_CLK);
+	RTL_W8(Config5, (RTL_R8(Config5) & ~Spi_en) | ASPM_en);
+	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
 }
 
 static void rtl_hw_start_8168f_1(struct rtl8169_private *tp)
@@ -6083,8 +6088,10 @@ static void rtl_hw_start_8168g(struct rtl8169_private *tp)
 	rtl_w0w1_eri(tp, 0xdc, ERIAR_MASK_0001, 0x01, 0x00, ERIAR_EXGMAC);
 	rtl_eri_write(tp, 0x2f8, ERIAR_MASK_0011, 0x1d8f, ERIAR_EXGMAC);
 
-	RTL_W32(MISC, RTL_R32(MISC) & ~RXDV_GATED_EN);
+	RTL_W32(MISC, (RTL_R32(MISC) | FORCE_CLK) & ~RXDV_GATED_EN);
 	RTL_W8(MaxTxPacketSize, EarlySize);
+	RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
+	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
 
 	rtl_eri_write(tp, 0xc0, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
 	rtl_eri_write(tp, 0xb8, ERIAR_MASK_0011, 0x0000, ERIAR_EXGMAC);
@@ -6594,6 +6601,9 @@ static void rtl_hw_start_8105e_1(struct rtl8169_private *tp)
 
 	RTL_W8(MCU, RTL_R8(MCU) | EN_NDP | EN_OOB_RESET);
 	RTL_W8(DLLPR, RTL_R8(DLLPR) | PFM_EN);
+	RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
+	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
+	RTL_W32(MISC, RTL_R32(MISC) | FORCE_CLK);
 
 	rtl_ephy_init(tp, e_info_8105e_1, ARRAY_SIZE(e_info_8105e_1));
 
@@ -6621,6 +6631,9 @@ static void rtl_hw_start_8402(struct rtl8169_private *tp)
 
 	RTL_W32(TxConfig, RTL_R32(TxConfig) | TXCFG_AUTO_FIFO);
 	RTL_W8(MCU, RTL_R8(MCU) & ~NOW_IS_OOB);
+	RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
+	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
+	RTL_W32(MISC, RTL_R32(MISC) | FORCE_CLK);
 
 	rtl_ephy_init(tp, e_info_8402, ARRAY_SIZE(e_info_8402));
 
@@ -6644,7 +6657,10 @@ static void rtl_hw_start_8106(struct rtl8169_private *tp)
 	/* Force LAN exit from ASPM if Rx/Tx are not idle */
 	RTL_W32(FuncEvent, RTL_R32(FuncEvent) | 0x002800);
 
-	RTL_W32(MISC, (RTL_R32(MISC) | DISABLE_LAN_EN) & ~EARLY_TALLY_EN);
+	RTL_W32(MISC,
+		(RTL_R32(MISC) | DISABLE_LAN_EN | FORCE_CLK) & ~EARLY_TALLY_EN);
+	RTL_W8(Config5, RTL_R8(Config5) | ASPM_en);
+	RTL_W8(Config2, RTL_R8(Config2) | ClkReqEn);
 	RTL_W8(MCU, RTL_R8(MCU) | EN_NDP | EN_OOB_RESET);
 	RTL_W8(DLLPR, RTL_R8(DLLPR) & ~PFM_EN);
 
-- 
2.14.1