forked from Openwrt/openwrt
2f663cab46
Replace patches for MediaTek Ethernet driver SGMII/SerDes unit with their corresponding upstream patches. Not all of the patches in our tree went upstream as-is, some are slightly different implementations, and they require the phylink_pcs helpers now made available. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
104 lines
3.5 KiB
Diff
104 lines
3.5 KiB
Diff
From 6e933a804c7db8be64f367f33e63cd7dcc302ebb Mon Sep 17 00:00:00 2001
|
|
From: Daniel Golle <daniel@makrotopia.org>
|
|
Date: Tue, 14 Mar 2023 00:34:45 +0000
|
|
Subject: [PATCH 2/2] net: ethernet: mtk_eth_soc: only write values if needed
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Only restart auto-negotiation and write link timer if actually
|
|
necessary. This prevents losing the link in case of minor
|
|
changes.
|
|
|
|
Fixes: 7e538372694b ("net: ethernet: mediatek: Re-add support SGMII")
|
|
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>
|
|
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
---
|
|
drivers/net/ethernet/mediatek/mtk_sgmii.c | 24 +++++++++++------------
|
|
1 file changed, 12 insertions(+), 12 deletions(-)
|
|
|
|
--- a/drivers/net/ethernet/mediatek/mtk_sgmii.c
|
|
+++ b/drivers/net/ethernet/mediatek/mtk_sgmii.c
|
|
@@ -38,20 +38,16 @@ static int mtk_pcs_config(struct phylink
|
|
const unsigned long *advertising,
|
|
bool permit_pause_to_mac)
|
|
{
|
|
+ bool mode_changed = false, changed, use_an;
|
|
struct mtk_pcs *mpcs = pcs_to_mtk_pcs(pcs);
|
|
unsigned int rgc3, sgm_mode, bmcr;
|
|
int advertise, link_timer;
|
|
- bool changed, use_an;
|
|
|
|
advertise = phylink_mii_c22_pcs_encode_advertisement(interface,
|
|
advertising);
|
|
if (advertise < 0)
|
|
return advertise;
|
|
|
|
- link_timer = phylink_get_link_timer_ns(interface);
|
|
- if (link_timer < 0)
|
|
- return link_timer;
|
|
-
|
|
/* Clearing IF_MODE_BIT0 switches the PCS to BASE-X mode, and
|
|
* we assume that fixes it's speed at bitrate = line rate (in
|
|
* other words, 1000Mbps or 2500Mbps).
|
|
@@ -77,13 +73,16 @@ static int mtk_pcs_config(struct phylink
|
|
}
|
|
|
|
if (use_an) {
|
|
- /* FIXME: Do we need to set AN_RESTART here? */
|
|
- bmcr = SGMII_AN_RESTART | SGMII_AN_ENABLE;
|
|
+ bmcr = SGMII_AN_ENABLE;
|
|
} else {
|
|
bmcr = 0;
|
|
}
|
|
|
|
if (mpcs->interface != interface) {
|
|
+ link_timer = phylink_get_link_timer_ns(interface);
|
|
+ if (link_timer < 0)
|
|
+ return link_timer;
|
|
+
|
|
/* PHYA power down */
|
|
regmap_update_bits(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL,
|
|
SGMII_PHYA_PWD, SGMII_PHYA_PWD);
|
|
@@ -101,16 +100,17 @@ static int mtk_pcs_config(struct phylink
|
|
regmap_update_bits(mpcs->regmap, mpcs->ana_rgc3,
|
|
RG_PHY_SPEED_3_125G, rgc3);
|
|
|
|
+ /* Setup the link timer */
|
|
+ regmap_write(mpcs->regmap, SGMSYS_PCS_LINK_TIMER, link_timer / 2 / 8);
|
|
+
|
|
mpcs->interface = interface;
|
|
+ mode_changed = true;
|
|
}
|
|
|
|
/* Update the advertisement, noting whether it has changed */
|
|
regmap_update_bits_check(mpcs->regmap, SGMSYS_PCS_ADVERTISE,
|
|
SGMII_ADVERTISE, advertise, &changed);
|
|
|
|
- /* Setup the link timer and QPHY power up inside SGMIISYS */
|
|
- regmap_write(mpcs->regmap, SGMSYS_PCS_LINK_TIMER, link_timer / 2 / 8);
|
|
-
|
|
/* Update the sgmsys mode register */
|
|
regmap_update_bits(mpcs->regmap, SGMSYS_SGMII_MODE,
|
|
SGMII_REMOTE_FAULT_DIS | SGMII_SPEED_DUPLEX_AN |
|
|
@@ -118,7 +118,7 @@ static int mtk_pcs_config(struct phylink
|
|
|
|
/* Update the BMCR */
|
|
regmap_update_bits(mpcs->regmap, SGMSYS_PCS_CONTROL_1,
|
|
- SGMII_AN_RESTART | SGMII_AN_ENABLE, bmcr);
|
|
+ SGMII_AN_ENABLE, bmcr);
|
|
|
|
/* Release PHYA power down state
|
|
* Only removing bit SGMII_PHYA_PWD isn't enough.
|
|
@@ -132,7 +132,7 @@ static int mtk_pcs_config(struct phylink
|
|
usleep_range(50, 100);
|
|
regmap_write(mpcs->regmap, SGMSYS_QPHY_PWR_STATE_CTRL, 0);
|
|
|
|
- return changed;
|
|
+ return changed || mode_changed;
|
|
}
|
|
|
|
static void mtk_pcs_restart_an(struct phylink_pcs *pcs)
|