Adds Sophgo dwmac driver support on the Sophgo SG2044 SoC.
Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/Kconfig | 11 ++
drivers/net/ethernet/stmicro/stmmac/Makefile | 1 +
.../ethernet/stmicro/stmmac/dwmac-sophgo.c | 132 ++++++++++++++++++
3 files changed, 144 insertions(+)
create mode 100644 drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
diff --git a/drivers/net/ethernet/stmicro/stmmac/Kconfig b/drivers/net/ethernet/stmicro/stmmac/Kconfig
index 05cc07b8f48c..bc44b21c593f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Kconfig
+++ b/drivers/net/ethernet/stmicro/stmmac/Kconfig
@@ -169,6 +169,17 @@ config DWMAC_SOCFPGA
for the stmmac device driver. This driver is used for
arria5 and cyclone5 FPGA SoCs.
+config DWMAC_SOPHGO
+ tristate "Sophgo dwmac support"
+ depends on OF && (ARCH_SOPHGO || COMPILE_TEST)
+ default m if ARCH_SOPHGO
+ help
+ Support for ethernet controllers on Sophgo RISC-V SoCs
+
+ This selects the Sophgo SoC specific glue layer support
+ for the stmmac device driver. This driver is used for the
+ ethernet controllers on various Sophgo SoCs.
+
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 c2f0e91f6bf8..e1287b53047b 100644
--- a/drivers/net/ethernet/stmicro/stmmac/Makefile
+++ b/drivers/net/ethernet/stmicro/stmmac/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_DWMAC_QCOM_ETHQOS) += dwmac-qcom-ethqos.o
obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
obj-$(CONFIG_DWMAC_RZN1) += dwmac-rzn1.o
obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
+obj-$(CONFIG_DWMAC_SOPHGO) += dwmac-sophgo.o
obj-$(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-sophgo.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
new file mode 100644
index 000000000000..83c67c061182
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Sophgo DWMAC platform driver
+ *
+ * Copyright (C) 2024 Inochi Amaoto <inochiama@xxxxxxxxx>
+ *
+ */
+
+#include <linux/bits.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+
+#include "stmmac_platform.h"
+
+struct sophgo_dwmac {
+ struct device *dev;
+ struct clk *clk_tx;
+};
+
+#define DWMAC_SG2044_FLAG_USE_RX_DELAY BIT(16)
+
+static void sophgo_dwmac_fix_mac_speed(void *priv, unsigned int speed, unsigned int mode)
+{
+ struct sophgo_dwmac *dwmac = priv;
+ unsigned long rate;
+ int ret;
+
+ switch (speed) {
+ case SPEED_1000:
+ rate = 125000000;
+ break;
+ case SPEED_100:
+ rate = 25000000;
+ break;
+ case SPEED_10:
+ rate = 2500000;
+ break;
+ default:
+ dev_err(dwmac->dev, "invalid speed %u\n", speed);
+ break;
+ }
+
+ ret = clk_set_rate(dwmac->clk_tx, rate);
+ if (ret)
+ dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);
+}
+
+static int sophgo_sg2044_dwmac_init(struct platform_device *pdev,
+ struct plat_stmmacenet_data *plat_dat,
+ struct stmmac_resources *stmmac_res)
+{
+ struct sophgo_dwmac *dwmac;
+ struct regmap *regmap;
+ unsigned int args[2];
+ int ret;
+
+ dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
+ if (!dwmac)
+ return -ENOMEM;
+
+ dwmac->clk_tx = devm_clk_get_enabled(&pdev->dev, "tx");
+ if (IS_ERR(dwmac->clk_tx))
+ return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_tx),
+ "failed to get tx clock\n");
+
+ regmap = syscon_regmap_lookup_by_phandle_args(pdev->dev.of_node,
+ "sophgo,syscon",
+ 2, args);
+ if (IS_ERR(regmap))
+ return dev_err_probe(&pdev->dev, PTR_ERR(regmap),
+ "failed to get the regmap\n");
+
+ ret = regmap_set_bits(regmap, args[0], DWMAC_SG2044_FLAG_USE_RX_DELAY);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "failed to set the phy rx delay\n");
+
+ dwmac->dev = &pdev->dev;
+ plat_dat->bsp_priv = dwmac;
+ plat_dat->flags |= STMMAC_FLAG_SPH_DISABLE;
+ plat_dat->fix_mac_speed = sophgo_dwmac_fix_mac_speed;
+ plat_dat->multicast_filter_bins = 0;
+ plat_dat->unicast_filter_entries = 1;
+
+ return 0;
+}
+
+static int sophgo_dwmac_probe(struct platform_device *pdev)
+{
+ struct plat_stmmacenet_data *plat_dat;
+ struct stmmac_resources stmmac_res;
+ 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");
+
+ ret = sophgo_sg2044_dwmac_init(pdev, plat_dat, &stmmac_res);
+ if (ret)
+ return ret;
+
+ return stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
+}
+
+static const struct of_device_id sophgo_dwmac_match[] = {
+ { .compatible = "sophgo,sg2044-dwmac" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, sophgo_dwmac_match);
+
+static struct platform_driver sophgo_dwmac_driver = {
+ .probe = sophgo_dwmac_probe,
+ .remove_new = stmmac_pltfr_remove,
+ .driver = {
+ .name = "sophgo-dwmac",
+ .pm = &stmmac_pltfr_pm_ops,
+ .of_match_table = sophgo_dwmac_match,
+ },
+};
+module_platform_driver(sophgo_dwmac_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Sophgo DWMAC platform driver");
--
2.47.0
