net: stmmac: Add dwmac-intel-plat for GBE driver (9efc9b2b) · Commits · 戴 / test

drivers/net/ethernet/stmicro/stmmac/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -209,6 +209,16 @@ config DWMAC_IMX8
		device driver. This driver is used for i.MX8 series like
		iMX8MP/iMX8DXL GMAC ethernet controller.

		config DWMAC_INTEL_PLAT
		tristate "Intel dwmac support"
		depends on OF && COMMON_CLK
		depends on STMMAC_ETH
		help
		Support for ethernet controllers on Intel SoCs

		This selects the Intel platform specific glue layer support for
		the stmmac device driver. This driver is used for the Intel Keem Bay
		SoC.
		endif

		config DWMAC_INTEL

drivers/net/ethernet/stmicro/stmmac/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -26,6 +26,7 @@ obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
		obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o
		obj-$(CONFIG_DWMAC_SUN8I) += dwmac-sun8i.o
		obj-$(CONFIG_DWMAC_DWC_QOS_ETH) += dwmac-dwc-qos-eth.o
		obj-$(CONFIG_DWMAC_INTEL_PLAT) += dwmac-intel-plat.o
		obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o
		obj-$(CONFIG_DWMAC_IMX8) += dwmac-imx.o
		stmmac-platform-objs:= stmmac_platform.o

drivers/net/ethernet/stmicro/stmmac/dwmac-intel-plat.c

0 → 100644

+191 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0
		/* Intel DWMAC platform driver
		*
		* Copyright(C) 2020 Intel Corporation
		*/

		#include <linux/ethtool.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/of_device.h>
		#include <linux/platform_device.h>
		#include <linux/stmmac.h>

		#include "stmmac.h"
		#include "stmmac_platform.h"

		struct intel_dwmac {
		struct device *dev;
		struct clk *tx_clk;
		const struct intel_dwmac_data *data;
		};

		struct intel_dwmac_data {
		void (fix_mac_speed)(void priv, unsigned int speed);
		unsigned long ptp_ref_clk_rate;
		unsigned long tx_clk_rate;
		bool tx_clk_en;
		};

		static void kmb_eth_fix_mac_speed(void *priv, unsigned int speed)
		{
		struct intel_dwmac *dwmac = priv;
		unsigned long rate;
		int ret;

		rate = clk_get_rate(dwmac->tx_clk);

		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\n");
		break;
		}

		ret = clk_set_rate(dwmac->tx_clk, rate);
		if (ret)
		dev_err(dwmac->dev, "Failed to configure tx clock rate\n");
		}

		static const struct intel_dwmac_data kmb_data = {
		.fix_mac_speed = kmb_eth_fix_mac_speed,
		.ptp_ref_clk_rate = 200000000,
		.tx_clk_rate = 125000000,
		.tx_clk_en = true,
		};

		static const struct of_device_id intel_eth_plat_match[] = {
		{ .compatible = "intel,keembay-dwmac", .data = &kmb_data },
		{ }
		};
		MODULE_DEVICE_TABLE(of, intel_eth_plat_match);

		static int intel_eth_plat_probe(struct platform_device *pdev)
		{
		struct net_device *ndev = platform_get_drvdata(pdev);
		struct stmmac_priv *priv = netdev_priv(ndev);
		struct plat_stmmacenet_data *plat_dat;
		struct stmmac_resources stmmac_res;
		const struct of_device_id *match;
		struct intel_dwmac *dwmac;
		unsigned long rate;
		int ret;

		plat_dat = priv->plat;
		ret = stmmac_get_platform_resources(pdev, &stmmac_res);
		if (ret)
		return ret;

		plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
		if (IS_ERR(plat_dat)) {
		dev_err(&pdev->dev, "dt configuration failed\n");
		return PTR_ERR(plat_dat);
		}

		dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
		if (!dwmac) {
		ret = -ENOMEM;
		goto err_remove_config_dt;
		}

		dwmac->dev = &pdev->dev;
		dwmac->tx_clk = NULL;

		match = of_match_device(intel_eth_plat_match, &pdev->dev);
		if (match && match->data) {
		dwmac->data = (const struct intel_dwmac_data *)match->data;

		if (dwmac->data->fix_mac_speed)
		plat_dat->fix_mac_speed = dwmac->data->fix_mac_speed;

		/* Enable TX clock */
		if (dwmac->data->tx_clk_en) {
		dwmac->tx_clk = devm_clk_get(&pdev->dev, "tx_clk");
		if (IS_ERR(dwmac->tx_clk))
		goto err_remove_config_dt;

		clk_prepare_enable(dwmac->tx_clk);

		/* Check and configure TX clock rate */
		rate = clk_get_rate(dwmac->tx_clk);
		if (dwmac->data->tx_clk_rate &&
		rate != dwmac->data->tx_clk_rate) {
		rate = dwmac->data->tx_clk_rate;
		ret = clk_set_rate(dwmac->tx_clk, rate);
		if (ret) {
		dev_err(&pdev->dev,
		"Failed to set tx_clk\n");
		return ret;
		}
		}
		}

		/* Check and configure PTP ref clock rate */
		rate = clk_get_rate(plat_dat->clk_ptp_ref);
		if (dwmac->data->ptp_ref_clk_rate &&
		rate != dwmac->data->ptp_ref_clk_rate) {
		rate = dwmac->data->ptp_ref_clk_rate;
		ret = clk_set_rate(plat_dat->clk_ptp_ref, rate);
		if (ret) {
		dev_err(&pdev->dev,
		"Failed to set clk_ptp_ref\n");
		return ret;
		}
		}
		}

		plat_dat->bsp_priv = dwmac;

		ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
		if (ret) {
		if (dwmac->tx_clk)
		clk_disable_unprepare(dwmac->tx_clk);

		goto err_remove_config_dt;
		}

		return 0;

		err_remove_config_dt:
		stmmac_remove_config_dt(pdev, plat_dat);

		return ret;
		}

		static int intel_eth_plat_remove(struct platform_device *pdev)
		{
		struct intel_dwmac *dwmac = get_stmmac_bsp_priv(&pdev->dev);
		int ret;

		ret = stmmac_pltfr_remove(pdev);

		if (dwmac->tx_clk)
		clk_disable_unprepare(dwmac->tx_clk);

		return ret;
		}

		static struct platform_driver intel_eth_plat_driver = {
		.probe = intel_eth_plat_probe,
		.remove = intel_eth_plat_remove,
		.driver = {
		.name = "intel-eth-plat",
		.pm = &stmmac_pltfr_pm_ops,
		.of_match_table = intel_eth_plat_match,
		},
		};
		module_platform_driver(intel_eth_plat_driver);

		MODULE_LICENSE("GPL v2");
		MODULE_DESCRIPTION("Intel DWMAC platform driver");

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