From a374a959b9125e5771a7b82a98444c300a04bb22 Mon Sep 17 00:00:00 2001 From: Birger Koblitz Date: Sun, 24 Apr 2022 22:01:31 +0200 Subject: [PATCH] realtek: do not reset SerDes on link change Do not reset the RTL930x SerDes on link changes, instead set up the SDS with internal PHYs for the SFP+ ports only. This fixes the 8 1GBit ports on the Zyxel XGS1250 which do not work without this patch. A complete SerDes reset was performed on all SerDes links. For copper 1Gbit ports, this is commonly a single XGMII link to an RTL8218D. There is however no support for setting up the XGMII link on RTL9300/RTL9310, thereby wiping the (RX/TX) setup done by u-boot and breaking the 1GBit ports. No SerDes reset should be done for these links. The handling of SGMII/HiSGMII, 1000BX or 10GR links is actually entirely different. All these modes need to be suitably RX calibrated and the pre- main and post- amplifiers set up properly for TX. The 10GBit SFP+ fiber links are recalibrated instead of reset, which e.g. is necessary when someone pulls a module out and puts another in. This makes swapping out 10GBit fiber modules possible. 1GBit modules are not yet supported, nor any modules with an internal phy. Tested-by: Stijn Segers Signed-off-by: Birger Koblitz [rewrite commit message based on discussion] Link: http://lists.infradead.org/pipermail/openwrt-devel/2022-May/038623.html Signed-off-by: Sander Vanheule (cherry picked from commit d1b824650f1ee694ec2dbdd2f4f9ec64e650cf86) --- target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c | 3 ++- .../linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl83xx.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c index 2e3ab4a805..f54fdd298a 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/dsa.c @@ -817,7 +817,8 @@ static void rtl93xx_phylink_mac_config(struct dsa_switch *ds, int port, __func__, phy_modes(state->interface)); return; } - rtl9300_sds_rst(sds_num, sds_mode); + if (state->interface == PHY_INTERFACE_MODE_10GBASER) + rtl9300_serdes_setup(sds_num, state->interface); } reg = sw_r32(priv->r->mac_force_mode_ctrl(port)); diff --git a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl83xx.h b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl83xx.h index 0bb11f9b8b..107016469c 100644 --- a/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl83xx.h +++ b/target/linux/realtek/files-5.10/drivers/net/dsa/rtl83xx/rtl83xx.h @@ -121,6 +121,7 @@ irqreturn_t rtl839x_switch_irq(int irq, void *dev_id); void rtl930x_vlan_profile_dump(int index); int rtl9300_sds_power(int mac, int val); void rtl9300_sds_rst(int sds_num, u32 mode); +int rtl9300_serdes_setup(int sds_num, phy_interface_t phy_mode); void rtl930x_print_matrix(void); /* RTL931x-specific */ -- 2.30.2