This patch adds support for configuring the ethernet MAC mode independently from the PHY mode on our SoC FPGA board. Specifically, this is necessary for a scenario where the ethernet controller MAC is connected to the FPGA HVIO with a different GMII interface, and the FPGA output is routed to the PHY using a RGMII interface.
To support this configuration, a mechanism is introduced to handle separate MAC mode settings, ensuring that the MAC controller and PHY can operate correctly with their respective interface modes. If mac-mode is not defined, the MAC mode will default to the PHY mode, ensuring compatibility and proper operation between the MAC and PHY. Signed-off-by: Boon Khai Ng <[email protected]> --- drivers/net/dwc_eth_xgmac_socfpga.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/net/dwc_eth_xgmac_socfpga.c b/drivers/net/dwc_eth_xgmac_socfpga.c index 87fb7e887e..07315f289d 100644 --- a/drivers/net/dwc_eth_xgmac_socfpga.c +++ b/drivers/net/dwc_eth_xgmac_socfpga.c @@ -29,6 +29,25 @@ #define SOCFPGA_XGMAC_SYSCON_ARG_COUNT 2 +phy_interface_t dwxgmac_of_get_mac_mode(struct udevice *dev) +{ + const char *mac_mode; + int i; + + debug("%s(dev=%p):\n", __func__, dev); + mac_mode = dev_read_string(dev, "mac-mode"); + if (!mac_mode) + return PHY_INTERFACE_MODE_NA; + + if (mac_mode) { + for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) { + if (!strcmp(mac_mode, phy_interface_strings[i])) + return i; + } + } + return PHY_INTERFACE_MODE_NA; +} + static int dwxgmac_socfpga_do_setphy(struct udevice *dev, u32 modereg) { struct xgmac_priv *xgmac = dev_get_priv(dev); @@ -66,12 +85,17 @@ static int xgmac_probe_resources_socfpga(struct udevice *dev) struct ofnode_phandle_args args; void *range; phy_interface_t interface; + phy_interface_t mac_mode; int ret; u32 modereg; interface = xgmac->config->interface(dev); + mac_mode = dwxgmac_of_get_mac_mode(dev); + + if (mac_mode == PHY_INTERFACE_MODE_NA) + mac_mode = interface; - switch (interface) { + switch (mac_mode) { case PHY_INTERFACE_MODE_MII: case PHY_INTERFACE_MODE_GMII: modereg = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII; -- 2.26.2
