Add support for Gigabit Ethernet on Nuvoton MA35 series using dwmac driver. Reviewed-by: Andrew Lunn Signed-off-by: Joey Lu --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 12 ++ drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../ethernet/stmicro/stmmac/dwmac-nuvoton.c | 136 ++++++++++++++++++ 3 files changed, 149 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index d3a6ab7383fc..c2cb530fd0a2 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -132,6 +132,18 @@ config DWMAC_MESON the stmmac device driver. This driver is used for Meson6, Meson8, Meson8b and GXBB SoCs. +config DWMAC_NUVOTON + tristate "Nuvoton MA35 dwmac support" + default ARCH_MA35 + depends on OF && (ARCH_MA35 || COMPILE_TEST) + select MFD_SYSCON + help + Support for Ethernet controller on Nuvoton MA35 series SoC. + + This selects the Nuvoton MA35 series SoC glue layer support + for the stmmac device driver. The nuvoton-dwmac driver is + used for MA35 series SoCs. + config DWMAC_QCOM_ETHQOS tristate "Qualcomm ETHQOS support" default ARCH_QCOM diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 945c5354eced..a1cea2f57252 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_DWMAC_IPQ806X) += dwmac-ipq806x.o obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o obj-$(CONFIG_DWMAC_MEDIATEK) += dwmac-mediatek.o obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o dwmac-meson8b.o +obj-$(CONFIG_DWMAC_NUVOTON) += dwmac-nuvoton.o obj-$(CONFIG_DWMAC_QCOM_ETHQOS) += dwmac-qcom-ethqos.o obj-$(CONFIG_DWMAC_RENESAS_GBETH) += dwmac-renesas-gbeth.o obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c new file mode 100644 index 000000000000..e2240b68ad98 --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-nuvoton.c @@ -0,0 +1,136 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Nuvoton DWMAC specific glue layer + * + * Copyright (C) 2025 Nuvoton Technology Corp. + * + * Author: Joey Lu + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "stmmac_platform.h" + +#define NVT_REG_SYS_GMAC0MISCR 0x108 +#define NVT_REG_SYS_GMAC1MISCR 0x10C + +#define NVT_MISCR_RMII BIT(0) + +/* Two thousand picoseconds are evenly mapped to a 4-bit field, + * resulting in each step being 2000/15 picoseconds. + */ +#define NVT_PATH_DELAY_STEP 134 +#define NVT_TX_DELAY_MASK GENMASK(19, 16) +#define NVT_RX_DELAY_MASK GENMASK(23, 20) + +struct nvt_priv_data { + struct device *dev; + struct regmap *regmap; + u32 macid; +}; + +static int nvt_gmac_get_delay(struct device *dev, const char *property) +{ + u32 arg; + + if (of_property_read_u32(dev->of_node, property, &arg)) + return 0; + + if (arg > 2000) + return -EINVAL; + + if (arg == 2000) + return 15; + + return arg / NVT_PATH_DELAY_STEP; +} + +static int nvt_set_phy_intf_sel(void *bsp_priv, u8 phy_intf_sel) +{ + struct nvt_priv_data *priv = bsp_priv; + u32 reg, val; + int ret; + + if (phy_intf_sel == PHY_INTF_SEL_RGMII) { + ret = nvt_gmac_get_delay(priv->dev, "rx-internal-delay-ps"); + if (ret < 0) + return ret; + val = FIELD_PREP(NVT_RX_DELAY_MASK, ret); + + ret = nvt_gmac_get_delay(priv->dev, "tx-internal-delay-ps"); + if (ret < 0) + return ret; + val |= FIELD_PREP(NVT_TX_DELAY_MASK, ret); + } else if (phy_intf_sel == PHY_INTF_SEL_RMII) { + val = NVT_MISCR_RMII; + } else { + return -EINVAL; + } + + reg = (priv->macid == 0) ? NVT_REG_SYS_GMAC0MISCR : NVT_REG_SYS_GMAC1MISCR; + regmap_update_bits(priv->regmap, reg, + NVT_RX_DELAY_MASK | NVT_TX_DELAY_MASK | NVT_MISCR_RMII, val); + + return 0; +} + +static int nvt_gmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct device *dev = &pdev->dev; + struct nvt_priv_data *priv; + int ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return dev_err_probe(dev, ret, "Failed to get platform resources\n"); + + plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac); + if (IS_ERR(plat_dat)) + return dev_err_probe(dev, PTR_ERR(plat_dat), "Failed to get platform data\n"); + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return dev_err_probe(dev, -ENOMEM, "Failed to allocate private data\n"); + + priv->regmap = syscon_regmap_lookup_by_phandle_args(dev->of_node, "nuvoton,sys", + 1, &priv->macid); + if (IS_ERR(priv->regmap)) + return dev_err_probe(dev, PTR_ERR(priv->regmap), "Failed to get sys register\n"); + + if (priv->macid > 1) + return dev_err_probe(dev, -EINVAL, "Invalid sys arguments\n"); + + plat_dat->bsp_priv = priv; + plat_dat->set_phy_intf_sel = nvt_set_phy_intf_sel; + + return stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res); +} + +static const struct of_device_id nvt_dwmac_match[] = { + { .compatible = "nuvoton,ma35d1-dwmac"}, + { } +}; +MODULE_DEVICE_TABLE(of, nvt_dwmac_match); + +static struct platform_driver nvt_dwmac_driver = { + .probe = nvt_gmac_probe, + .remove = stmmac_pltfr_remove, + .driver = { + .name = "nuvoton-dwmac", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = nvt_dwmac_match, + }, +}; +module_platform_driver(nvt_dwmac_driver); + +MODULE_AUTHOR("Joey Lu "); +MODULE_DESCRIPTION("Nuvoton DWMAC specific glue layer"); +MODULE_LICENSE("GPL"); -- 2.43.0