diff mbox series

[net-next,v12,06/18] net: ethernet: mtk_eth_soc: reset PCS state

Message ID 0105ba8db974bca74846d605b18dcf948a7ab3d9.1678201958.git.daniel@makrotopia.org (mailing list archive)
State New, archived
Headers show
Series net: ethernet: mtk_eth_soc: various enhancements | expand

Commit Message

Daniel Golle March 7, 2023, 3:53 p.m. UTC 
Reset the internal PCS state machine when changing interface mode.
This prevents confusing the state machine when changing interface
modes, e.g. from SGMII to 2500Base-X or vice-versa.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.h | 4 ++++
 drivers/net/ethernet/mediatek/mtk_sgmii.c   | 4 ++++
 2 files changed, 8 insertions(+)

Comments

Frank Wunderlich March 7, 2023, 6:49 p.m. UTC | #1 
> Gesendet: Dienstag, 07. März 2023 um 16:53 Uhr
> Von: "Daniel Golle" <daniel@makrotopia.org>
>
> Reset the internal PCS state machine when changing interface mode.
> This prevents confusing the state machine when changing interface
> modes, e.g. from SGMII to 2500Base-X or vice-versa.
> 
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> Tested-by: Bjørn Mork <bjorn@mork.no>
> Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Hi,

have tested Parts 1-12 this on bananapi-r3 (mt7986) with 1G Fiber SFP (no 2g5 available yet) on gmac1 and lan4 (mt7531 p5)

Tested-by: Frank Wunderlich <frank-w@public-files.de>

Thx Daniel for working on SFP support :)

regards Frank
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 7014c02ba2d4..142def8629c8 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -548,6 +548,10 @@ 
 #define SGMII_SEND_AN_ERROR_EN		BIT(11)
 #define SGMII_IF_MODE_MASK		GENMASK(5, 1)
 
+/* Register to reset SGMII design */
+#define SGMII_RESERVED_0	0x34
+#define SGMII_SW_RESET		BIT(0)
+
 /* Register to set SGMII speed, ANA RG_ Control Signals III*/
 #define SGMSYS_ANA_RG_CS3	0x2028
 #define RG_PHY_SPEED_MASK	(BIT(2) | BIT(3))
diff --git a/drivers/net/ethernet/mediatek/mtk_sgmii.c b/drivers/net/ethernet/mediatek/mtk_sgmii.c
index d7ffaaeaf9ab..d7e7352041a4 100644
--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
@@ -88,6 +88,10 @@  static int mtk_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
 		regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL,
 				   SGMII_PHYA_PWD, SGMII_PHYA_PWD);
 
+		/* Reset SGMII PCS state */
+		regmap_update_bits(mpcs->regmap, SGMII_RESERVED_0,
+				   SGMII_SW_RESET, SGMII_SW_RESET);
+
 		if (mpcs->flags & MTK_SGMII_FLAG_PN_SWAP)
 			regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_WRAP_CTRL,
 					   SGMII_PN_SWAP_MASK,