The GMAC IP on Spacemit K3 is almost a standard Synopsys DesignWare MAC (version 5.40a) with some extra clock. Add necessary compatible string for this device. Signed-off-by: Inochi Amaoto --- .../devicetree/bindings/net/snps,dwmac.yaml | 3 + .../bindings/net/spacemit,k3-dwmac.yaml | 103 ++++++++++++++++++ 2 files changed, 106 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml index dd3c72e8363e..3c2c6cb6b10b 100644 --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml @@ -34,6 +34,7 @@ select: - snps,dwmac-5.10a - snps,dwmac-5.20 - snps,dwmac-5.30a + - snps,dwmac-5.40a - snps,dwxgmac - snps,dwxgmac-2.10 @@ -108,6 +109,7 @@ properties: - snps,dwmac-5.10a - snps,dwmac-5.20 - snps,dwmac-5.30a + - snps,dwmac-5.40a - snps,dwxgmac - snps,dwxgmac-2.10 - sophgo,sg2042-dwmac @@ -653,6 +655,7 @@ allOf: - snps,dwmac-5.10a - snps,dwmac-5.20 - snps,dwmac-5.30a + - snps,dwmac-5.40a - snps,dwxgmac - snps,dwxgmac-2.10 - st,spear600-gmac diff --git a/Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml b/Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml new file mode 100644 index 000000000000..e69f3b60c51f --- /dev/null +++ b/Documentation/devicetree/bindings/net/spacemit,k3-dwmac.yaml @@ -0,0 +1,103 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/net/spacemit,k3-dwmac.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Spacemit K3 DWMAC glue layer + +maintainers: + - Inochi Amaoto + +select: + properties: + compatible: + contains: + const: spacemit,k3-dwmac + required: + - compatible + +properties: + compatible: + items: + - const: spacemit,k3-dwmac + - const: snps,dwmac-5.40a + + reg: + maxItems: 1 + + clocks: + items: + - description: GMAC main clock + - description: PTP clock + - description: TX clock + + clock-names: + items: + - const: stmmaceth + - const: ptp_ref + - const: tx + + interrupts: + minItems: 1 + items: + - description: MAC interrupt + - description: MAC wake interrupt + + interrupt-names: + minItems: 1 + items: + - const: macirq + - const: eth_wake_irq + + resets: + maxItems: 1 + + reset-names: + const: stmmaceth + + spacemit,apmu: + $ref: /schemas/types.yaml#/definitions/phandle-array + items: + - items: + - description: phandle to the syscon node which control the glue register + - description: offset of the control register + - description: offset of the dline register + + description: + A phandle to syscon with offset to control registers for this MAC + +required: + - compatible + - reg + - clocks + - clock-names + - interrupts + - interrupt-names + - resets + - reset-names + +allOf: + - $ref: snps,dwmac.yaml# + +unevaluatedProperties: false + +examples: + - | + #include + + eth0: ethernet@cac80000 { + compatible = "spacemit,k3-dwmac", "snps,dwmac-5.40a"; + reg = <0xcac80000 0x2000>; + clocks = <&syscon_apmu 66>, <&syscon_apmu 68>, + <&syscon_apmu 69>; + clock-names = "stmmaceth", "ptp_ref", "tx"; + interrupts = <131 IRQ_TYPE_LEVEL_HIGH>, <276 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "macirq", "eth_wake_irq"; + phy-mode = "rgmii-id"; + phy-handle = <&phy0>; + resets = <&syscon_apmu 67>; + reset-names = "stmmaceth"; + spacemit,apmu = <&syscon_apmu 0x384 0x38c>; + }; + -- 2.52.0 Add compatible string for 5.40a version that can avoid to define some platform data in the glue layer. Signed-off-by: Inochi Amaoto --- drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 8979a50b5507..54c7b1537ab9 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -396,6 +396,7 @@ static const char * const stmmac_gmac4_compats[] = { "snps,dwmac-5.10a", "snps,dwmac-5.20", "snps,dwmac-5.30a", + "snps,dwmac-5.40a", NULL }; -- 2.52.0 The etherenet controller on Spacemit K3 SoC is Synopsys DesignWare MAC (version 5.40a), with the following special point: 1. The rate of the tx clock line is auto changed when the mac speed rate is changed, and no need for changing the input tx clock. 2. This controller require a extra syscon device to configure the interface type, enable wake up interrupt and delay configuration if needed. Add Spacemit dwmac driver support on the Spacemit K3 SoC. Signed-off-by: Inochi Amaoto --- drivers/net/ethernet/stmicro/stmmac/Kconfig | 12 + drivers/net/ethernet/stmicro/stmmac/Makefile | 1 + .../ethernet/stmicro/stmmac/dwmac-spacemit.c | 221 ++++++++++++++++++ 3 files changed, 234 insertions(+) create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig index 907fe2e927f0..583a4692f5da 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Kconfig +++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig @@ -216,6 +216,18 @@ config DWMAC_SOPHGO for the stmmac device driver. This driver is used for the ethernet controllers on various Sophgo SoCs. +config DWMAC_SPACEMIT + tristate "Spacemit dwmac support" + depends on OF && (ARCH_SPACEMIT || COMPILE_TEST) + select MFD_SYSCON + default m if ARCH_SPACEMIT + help + Support for ethernet controllers on Spacemit RISC-V SoCs + + This selects the Spacemit platform specific glue layer support + for the stmmac device driver. This driver is used for the + Spacemit K3 ethernet controllers. + config DWMAC_STARFIVE tristate "StarFive dwmac support" depends on OF && (ARCH_STARFIVE || COMPILE_TEST) diff --git a/drivers/net/ethernet/stmicro/stmmac/Makefile b/drivers/net/ethernet/stmicro/stmmac/Makefile index 7bf528731034..9e32045631d8 100644 --- a/drivers/net/ethernet/stmicro/stmmac/Makefile +++ b/drivers/net/ethernet/stmicro/stmmac/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_DWMAC_RZN1) += dwmac-rzn1.o obj-$(CONFIG_DWMAC_S32) += dwmac-s32.o obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o obj-$(CONFIG_DWMAC_SOPHGO) += dwmac-sophgo.o +obj-$(CONFIG_DWMAC_SPACEMIT) += dwmac-spacemit.o obj-$(CONFIG_DWMAC_STARFIVE) += dwmac-starfive.o obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c new file mode 100644 index 000000000000..ca600c068aaa --- /dev/null +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-spacemit.c @@ -0,0 +1,221 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Spacemit DWMAC platform driver + * + * Copyright (C) 2026 Inochi Amaoto + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "stmmac_platform.h" + +/* ctrl register bits */ +#define PHY_INTF_RGMII BIT(3) +#define PHY_INTF_MII BIT(4) + +#define WAKE_IRQ_EN BIT(9) +#define PHY_IRQ_EN BIT(12) + +/* dline register bits */ +#define RGMII_RX_DLINE_EN BIT(0) +#define RGMII_RX_DLINE_STEP GENMASK(5, 4) +#define RGMII_RX_DLINE_CODE GENMASK(15, 8) +#define RGMII_TX_DLINE_EN BIT(16) +#define RGMII_TX_DLINE_STEP GENMASK(21, 20) +#define RGMII_TX_DLINE_CODE GENMASK(31, 24) + +#define MAX_DLINE_DELAY_CODE 0xff +#define MAX_WORKED_DELAY 2800 + +/* Note: the delay step value is at 0.1ps */ +static const unsigned int k3_delay_step_10x[4] = { + 367, 493, 559, 685 +}; + +static int spacemit_dwmac_set_delay(struct regmap *apmu, + unsigned int dline_offset, + unsigned int tx_code, unsigned int tx_config, + unsigned int rx_code, unsigned int rx_config) +{ + unsigned int mask, val; + + mask = RGMII_RX_DLINE_STEP | RGMII_TX_DLINE_CODE | RGMII_TX_DLINE_EN | + RGMII_TX_DLINE_STEP | RGMII_RX_DLINE_CODE | RGMII_RX_DLINE_EN; + val = FIELD_PREP(RGMII_TX_DLINE_STEP, tx_config) | + FIELD_PREP(RGMII_TX_DLINE_CODE, tx_code) | RGMII_TX_DLINE_EN | + FIELD_PREP(RGMII_RX_DLINE_STEP, rx_config) | + FIELD_PREP(RGMII_RX_DLINE_CODE, rx_code) | RGMII_RX_DLINE_EN; + + return regmap_update_bits(apmu, dline_offset, mask, val); +} + +static int spacemit_dwmac_detected_delay_value(unsigned int delay, + unsigned int *config) +{ + unsigned int best_delay = 0; + unsigned int best_config = 0; + int best_code = 0; + int i; + + if (delay == 0) + return 0; + + if (delay > MAX_WORKED_DELAY) + return -EINVAL; + + for (i = 0; i < ARRAY_SIZE(k3_delay_step_10x); i++) { + unsigned int step = k3_delay_step_10x[i]; + int code = DIV_ROUND_CLOSEST(delay * 10 * 10, step * 9); + unsigned int tmp = code * step * 9 / 10 / 10; + + if (abs(tmp - delay) < abs(best_delay - delay)) { + best_code = code; + best_delay = tmp; + best_config = i; + } + } + + *config = best_config; + + return best_code; +} + +static int spacemit_dwmac_fix_delay(struct plat_stmmacenet_data *plat_dat, + struct regmap *apmu, + unsigned int dline_offset, + unsigned int tx_delay, unsigned int rx_delay) +{ + bool mac_rxid = rx_delay != 0; + bool mac_txid = tx_delay != 0; + unsigned int rx_config = 0; + unsigned int tx_config = 0; + int rx_code; + int tx_code; + + plat_dat->phy_interface = phy_fix_phy_mode_for_mac_delays(plat_dat->phy_interface, + mac_txid, + mac_rxid); + + if (plat_dat->phy_interface == PHY_INTERFACE_MODE_NA) + return -EINVAL; + + rx_code = spacemit_dwmac_detected_delay_value(rx_delay, &rx_config); + if (rx_code < 0) + return rx_code; + + tx_code = spacemit_dwmac_detected_delay_value(tx_delay, &tx_config); + if (tx_code < 0) + return tx_code; + + return spacemit_dwmac_set_delay(apmu, dline_offset, + tx_code, tx_config, + rx_code, rx_config); +} + +static int spacemit_dwmac_update_ifconfig(struct plat_stmmacenet_data *plat_dat, + struct stmmac_resources *stmmac_res, + struct regmap *apmu, + unsigned int ctrl_offset) +{ + unsigned int mask = PHY_INTF_MII | PHY_INTF_RGMII | WAKE_IRQ_EN; + unsigned int val = 0; + + switch (plat_dat->phy_interface) { + case PHY_INTERFACE_MODE_MII: + val = PHY_INTF_MII; + break; + + case PHY_INTERFACE_MODE_RMII: + break; + + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + val = PHY_INTF_RGMII; + break; + + default: + return -EOPNOTSUPP; + } + + if (stmmac_res->wol_irq >= 0) + val |= WAKE_IRQ_EN; + + return regmap_update_bits(apmu, ctrl_offset, mask, val); +} + +static int spacemit_dwmac_probe(struct platform_device *pdev) +{ + struct plat_stmmacenet_data *plat_dat; + struct stmmac_resources stmmac_res; + struct device *dev = &pdev->dev; + unsigned int offset[2]; + struct regmap *apmu; + u32 rx_delay = 0; + u32 tx_delay = 0; + 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 parse DT parameters\n"); + + 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), + "failed to get tx clock\n"); + + apmu = syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node, "spacemit,apmu", 2, offset); + if (IS_ERR(apmu)) + return dev_err_probe(dev, PTR_ERR(apmu), + "Failed to get apmu regmap\n"); + + ret = spacemit_dwmac_update_ifconfig(plat_dat, &stmmac_res, + apmu, offset[0]); + if (ret) + return dev_err_probe(dev, ret, "Failed to configure ifconfig\n"); + + of_property_read_u32(pdev->dev.of_node, "tx-internal-delay-ps", &tx_delay); + of_property_read_u32(pdev->dev.of_node, "rx-internal-delay-ps", &rx_delay); + + ret = spacemit_dwmac_fix_delay(plat_dat, apmu, offset[1], tx_delay, rx_delay); + if (ret) + return dev_err_probe(dev, ret, "Failed to configure delay\n"); + + return stmmac_dvr_probe(dev, plat_dat, &stmmac_res); +} + +static const struct of_device_id spacemit_dwmac_match[] = { + { .compatible = "spacemit,k3-dwmac" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, spacemit_dwmac_match); + +static struct platform_driver spacemit_dwmac_driver = { + .probe = spacemit_dwmac_probe, + .remove = stmmac_pltfr_remove, + .driver = { + .name = "spacemit-dwmac", + .pm = &stmmac_pltfr_pm_ops, + .of_match_table = spacemit_dwmac_match, + }, +}; +module_platform_driver(spacemit_dwmac_driver); + +MODULE_AUTHOR("Inochi Amaoto "); +MODULE_DESCRIPTION("Spacemit DWMAC platform driver"); +MODULE_LICENSE("GPL"); -- 2.52.0