diff options
| author | Choong Yong Liang <yong.liang.choong@linux.intel.com> | 2025-02-27 20:15:18 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-03-05 19:02:47 -0800 |
| commit | 065d3cef99a10385d1c82919a612722dfdac90cc (patch) | |
| tree | cab6266561fdb875f1ec8ade1429be3d6848780d | |
| parent | b63263555eaafbf9ab1a82f2020bbee872d83759 (diff) | |
net: pcs: xpcs: re-initiate clause 37 Auto-negotiation
The xpcs_switch_interface_mode function was introduced to handle
interface switching.
According to the XPCS datasheet, a soft reset is required to initiate
Clause 37 auto-negotiation when the XPCS switches interface modes.
When the interface mode switches from 2500BASE-X to SGMII,
re-initiating Clause 37 auto-negotiation is required for the SGMII
interface mode to function properly.
Signed-off-by: Choong Yong Liang <yong.liang.choong@linux.intel.com>
Link: https://patch.msgid.link/20250227121522.1802832-3-yong.liang.choong@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/pcs/pcs-xpcs.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c index e32dec4b812e..3d1bd5aac093 100644 --- a/drivers/net/pcs/pcs-xpcs.c +++ b/drivers/net/pcs/pcs-xpcs.c @@ -602,12 +602,33 @@ static void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces) __set_bit(compat->interface, interfaces); } +static int xpcs_switch_interface_mode(struct dw_xpcs *xpcs, + phy_interface_t interface) +{ + int ret = 0; + + if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { + ret = txgbe_xpcs_switch_mode(xpcs, interface); + } else if (xpcs->interface != interface) { + if (interface == PHY_INTERFACE_MODE_SGMII) + xpcs->need_reset = true; + xpcs->interface = interface; + } + + return ret; +} + static void xpcs_pre_config(struct phylink_pcs *pcs, phy_interface_t interface) { struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs); const struct dw_xpcs_compat *compat; int ret; + ret = xpcs_switch_interface_mode(xpcs, interface); + if (ret) + dev_err(&xpcs->mdiodev->dev, "switch interface failed: %pe\n", + ERR_PTR(ret)); + if (!xpcs->need_reset) return; @@ -799,10 +820,6 @@ static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface, return -ENODEV; if (xpcs->info.pma == WX_TXGBE_XPCS_PMA_10G_ID) { - ret = txgbe_xpcs_switch_mode(xpcs, interface); - if (ret) - return ret; - /* Wangxun devices need backplane CL37 AN enabled for * SGMII and 1000base-X */ |