From: Shangjuan Wei Add Ethernet controller support for Eswin's eic7700 SoC. The driver provides management and control of Ethernet signals for the eiC7700 series chips. Signed-off-by: Zhi Li Signed-off-by: Shangjuan Wei --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../ethernet/stmicro/stmmac/dwmac-eic7700.c | 257 ++++++++++++++++++ 3 files changed, 269 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-eic7700.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 67fa879b1e52..a13b15ce1abd 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -67,6 +67,17 @@ config DWMAC_ANARION This selects the Anarion SoC glue layer support for the stmmac driver. +config DWMAC_EIC7700 + tristate "Support for Eswin eic7700 ethernet driver" + select CRC32 + select MII + depends on OF && HAS_DMA && ARCH_ESWIN || COMPILE_TEST + help + This driver supports the Eswin EIC7700 Ethernet controller, + which integrates Synopsys DesignWare QoS features. It enables + high-speed networking with DMA acceleration and is optimized + for embedded systems. + config DWMAC_INGENIC tristate "Ingenic MAC support" default MACH_INGENIC diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index b591d93f8503..f4ec5fc16571 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -14,6 +14,7 @@ stmmac-$(CONFIG_STMMAC_SELFTESTS) += stmmac_selftests.o # Ordering matters. Generic driver must be last. obj-$(CONFIG_STMMAC_PLATFORM) += stmmac-platform.o obj-$(CONFIG_DWMAC_ANARION) += dwmac-anarion.o +obj-$(CONFIG_DWMAC_EIC7700) += dwmac-eic7700.o obj-$(CONFIG_DWMAC_INGENIC) += dwmac-ingenic.o obj-$(CONFIG_DWMAC_IPQ806X) += dwmac-ipq806x.o obj-$(CONFIG_DWMAC_LPC18XX) += dwmac-lpc18xx.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-eic7700.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-eic7700.c new file mode 100644 index 000000000000..000362e9987d --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-eic7700.c @@ -0,0 +1,257 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Eswin DWC Ethernet linux driver + * + * Copyright 2025, Beijing ESWIN Computing Technology Co., Ltd. + * + * Authors: + * Shuang Liang + * Shangjuan Wei + */ + +#include +#include +#include +#include +#include + +#include "stmmac_platform.h" + +/* eth_phy_ctrl_offset eth0:0x100; eth1:0x200 */ +#define EIC7700_ETH_TX_CLK_SEL BIT(16) +#define EIC7700_ETH_PHY_INTF_SELI BIT(0) + +/* eth_axi_lp_ctrl_offset eth0:0x108; eth1:0x208 */ +#define EIC7700_ETH_CSYSREQ_VAL BIT(0) + +/* hsp_aclk_ctrl_offset (0x148) */ +#define EIC7700_HSP_ACLK_CLKEN BIT(31) +#define EIC7700_HSP_ACLK_DIVSOR (0x2 << 4) + +/* hsp_cfg_ctrl_offset (0x14c) */ +#define EIC7700_HSP_CFG_CLKEN BIT(31) +#define EIC7700_SCU_HSP_PCLK_EN BIT(30) +#define EIC7700_HSP_CFG_CTRL_REGSET (EIC7700_HSP_CFG_CLKEN | EIC7700_SCU_HSP_PCLK_EN) + +/* TX/RX clock delay (unit: 0.1ns per bit) */ +#define EIC7700_ETH_TX_ADJ_DELAY GENMASK(14, 8) +#define EIC7700_ETH_RX_ADJ_DELAY GENMASK(30, 24) + +/* Default delay value*/ +#define EIC7700_DELAY_VALUE0 0x20202020 +#define EIC7700_DELAY_VALUE1 0x96205A20 + +struct eic7700_qos_priv { + struct device *dev; + struct regmap *crg_regmap; + struct regmap *hsp_regmap; + u32 tx_delay_ps; + u32 rx_delay_ps; + u32 dly_hsp_reg[3]; + u32 dly_param_1000m[3]; + u32 dly_param_100m[3]; + u32 dly_param_10m[3]; +}; + +static inline void eic7700_set_delay(u32 rx_ps, u32 tx_ps, u32 *reg) +{ + u32 rx_val = rx_ps / 100; + + if (rx_val > 0x7F) + rx_val = 0x7F; + + *reg &= ~EIC7700_ETH_RX_ADJ_DELAY; + *reg |= (rx_val << 24) & EIC7700_ETH_RX_ADJ_DELAY; + + u32 tx_val = tx_ps / 100; + + if (tx_val > 0x7F) + tx_val = 0x7F; + + *reg &= ~EIC7700_ETH_TX_ADJ_DELAY; + *reg |= (tx_val << 8) & EIC7700_ETH_TX_ADJ_DELAY; +} + +static void eic7700_qos_fix_speed(void *priv, int speed, u32 mode) +{ + struct eic7700_qos_priv *dwc_priv = priv; + int i; + + switch (speed) { + case SPEED_1000: + for (i = 0; i < 3; i++) + regmap_write(dwc_priv->hsp_regmap, + dwc_priv->dly_hsp_reg[i], + dwc_priv->dly_param_1000m[i]); + break; + case SPEED_100: + for (i = 0; i < 3; i++) { + regmap_write(dwc_priv->hsp_regmap, + dwc_priv->dly_hsp_reg[i], + dwc_priv->dly_param_100m[i]); + } + break; + case SPEED_10: + for (i = 0; i < 3; i++) { + regmap_write(dwc_priv->hsp_regmap, + dwc_priv->dly_hsp_reg[i], + dwc_priv->dly_param_10m[i]); + } + break; + default: + dev_err(dwc_priv->dev, "invalid speed %u\n", speed); + break; + } +} + +static int eic7700_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct eic7700_qos_priv *dwc_priv; + u32 hsp_aclk_ctrl_offset; + u32 hsp_aclk_ctrl_regset; + u32 hsp_cfg_ctrl_offset; + u32 eth_axi_lp_ctrl_offset; + u32 eth_phy_ctrl_offset; + u32 eth_phy_ctrl_regset; + bool has_rx_dly = false; + bool has_tx_dly = false; + int ret; + + ret = stmmac_get_platform_resources(pdev, &stmmac_res); + if (ret) + return dev_err_probe(&pdev->dev, ret, + "failed to get resources\n"); + + plat_dat = devm_stmmac_probe_config_dt(pdev, stmmac_res.mac); + if (IS_ERR(plat_dat)) + return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat), + "dt configuration failed\n"); + + dwc_priv = devm_kzalloc(&pdev->dev, sizeof(*dwc_priv), GFP_KERNEL); + if (!dwc_priv) + return -ENOMEM; + + dwc_priv->dev = &pdev->dev; + dwc_priv->dly_param_1000m[0] = EIC7700_DELAY_VALUE0; + dwc_priv->dly_param_1000m[1] = EIC7700_DELAY_VALUE1; + dwc_priv->dly_param_1000m[2] = EIC7700_DELAY_VALUE0; + dwc_priv->dly_param_100m[0] = EIC7700_DELAY_VALUE0; + dwc_priv->dly_param_100m[1] = EIC7700_DELAY_VALUE1; + dwc_priv->dly_param_100m[2] = EIC7700_DELAY_VALUE0; + dwc_priv->dly_param_10m[0] = 0x0; + dwc_priv->dly_param_10m[1] = 0x0; + dwc_priv->dly_param_10m[2] = 0x0; + + ret = of_property_read_u32(pdev->dev.of_node, "rx-internal-delay-ps", + &dwc_priv->rx_delay_ps); + if (ret) + dev_dbg(&pdev->dev, "can't get rx-internal-delay-ps, ret(%d).", ret); + else + has_rx_dly = true; + + ret = of_property_read_u32(pdev->dev.of_node, "tx-internal-delay-ps", + &dwc_priv->tx_delay_ps); + if (ret) + dev_dbg(&pdev->dev, "can't get tx-internal-delay-ps, ret(%d).", ret); + else + has_tx_dly = true; + if (has_rx_dly && has_tx_dly) { + eic7700_set_delay(dwc_priv->rx_delay_ps, dwc_priv->tx_delay_ps, + &dwc_priv->dly_param_1000m[1]); + eic7700_set_delay(dwc_priv->rx_delay_ps, dwc_priv->tx_delay_ps, + &dwc_priv->dly_param_100m[1]); + eic7700_set_delay(dwc_priv->rx_delay_ps, dwc_priv->tx_delay_ps, + &dwc_priv->dly_param_10m[1]); + } else { + dev_dbg(&pdev->dev, " use default dly\n"); + } + + ret = of_property_read_variable_u32_array(pdev->dev.of_node, "eswin,dly_hsp_reg", + &dwc_priv->dly_hsp_reg[0], 3, 0); + if (ret != 3) { + dev_err(&pdev->dev, "can't get delay hsp reg.ret(%d)\n", ret); + return ret; + } + + dwc_priv->crg_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "eswin,syscrg_csr"); + if (IS_ERR(dwc_priv->crg_regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(dwc_priv->crg_regmap), + "Failed to get syscrg_csr regmap\n"); + + ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr", 1, + &hsp_aclk_ctrl_offset); + if (ret) + return dev_err_probe(&pdev->dev, ret, "can't get hsp_aclk_ctrl_offset\n"); + + regmap_read(dwc_priv->crg_regmap, hsp_aclk_ctrl_offset, &hsp_aclk_ctrl_regset); + hsp_aclk_ctrl_regset |= (EIC7700_HSP_ACLK_CLKEN | EIC7700_HSP_ACLK_DIVSOR); + regmap_write(dwc_priv->crg_regmap, hsp_aclk_ctrl_offset, hsp_aclk_ctrl_regset); + + ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,syscrg_csr", 2, + &hsp_cfg_ctrl_offset); + if (ret) + return dev_err_probe(&pdev->dev, ret, "can't get hsp_cfg_ctrl_offset\n"); + + regmap_write(dwc_priv->crg_regmap, hsp_cfg_ctrl_offset, EIC7700_HSP_CFG_CTRL_REGSET); + + dwc_priv->hsp_regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "eswin,hsp_sp_csr"); + if (IS_ERR(dwc_priv->hsp_regmap)) + return dev_err_probe(&pdev->dev, PTR_ERR(dwc_priv->hsp_regmap), + "Failed to get hsp_sp_csr regmap\n"); + + ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr", 2, + ð_phy_ctrl_offset); + if (ret) + return dev_err_probe(&pdev->dev, ret, "can't get eth_phy_ctrl_offset\n"); + + regmap_read(dwc_priv->hsp_regmap, eth_phy_ctrl_offset, ð_phy_ctrl_regset); + eth_phy_ctrl_regset |= (EIC7700_ETH_TX_CLK_SEL | EIC7700_ETH_PHY_INTF_SELI); + regmap_write(dwc_priv->hsp_regmap, eth_phy_ctrl_offset, eth_phy_ctrl_regset); + + ret = of_property_read_u32_index(pdev->dev.of_node, "eswin,hsp_sp_csr", 3, + ð_axi_lp_ctrl_offset); + if (ret) + return dev_err_probe(&pdev->dev, ret, "can't get eth_axi_lp_ctrl_offset\n"); + + regmap_write(dwc_priv->hsp_regmap, eth_axi_lp_ctrl_offset, EIC7700_ETH_CSYSREQ_VAL); + + plat_dat->clk_tx_i = devm_clk_get_enabled(&pdev->dev, "tx"); + if (IS_ERR(plat_dat->clk_tx_i)) + return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat->clk_tx_i), + "error getting tx clock\n"); + + plat_dat->fix_mac_speed = eic7700_qos_fix_speed; + plat_dat->set_clk_tx_rate = stmmac_set_clk_tx_rate; + plat_dat->bsp_priv = dwc_priv; + + ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res); + if (ret) + return dev_err_probe(&pdev->dev, ret, "Failed to driver probe\n"); + + return ret; +} + +static const struct of_device_id eic7700_dwmac_match[] = { + { .compatible = "eswin,eic7700-qos-eth" }, + { } +}; +MODULE_DEVICE_TABLE(of, eic7700_dwmac_match); + +static struct platform_driver eic7700_dwmac_driver = { + .probe = eic7700_dwmac_probe, + .remove = stmmac_pltfr_remove, + .driver = { + .name = "eic7700-eth-dwmac", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = eic7700_dwmac_match, + }, +}; +module_platform_driver(eic7700_dwmac_driver); + +MODULE_AUTHOR("Eswin"); +MODULE_AUTHOR("Shuang Liang "); +MODULE_AUTHOR("Shangjuan Wei "); +MODULE_DESCRIPTION("Eswin eic7700 qos ethernet driver"); +MODULE_LICENSE("GPL"); -- 2.17.1