net: phy: Add gmiitorgmii converter support (f411a616) · Commits · 戴 / test

drivers/net/phy/Kconfig

+7 −0

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		@@ -312,6 +312,13 @@ config MICROSEMI_PHY
		---help---
		Currently supports the VSC8531 and VSC8541 PHYs

		config XILINX_GMII2RGMII
		tristate "Xilinx GMII2RGMII converter driver"
		---help---
		This driver support xilinx GMII to RGMII IP core it provides
		the Reduced Gigabit Media Independent Interface(RGMII) between
		Ethernet physical media devices and the Gigabit Ethernet controller.

		endif # PHYLIB

		config MICREL_KS8995MA

drivers/net/phy/Makefile

+1 −0

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		@@ -50,3 +50,4 @@ obj-$(CONFIG_MDIO_BCM_IPROC) += mdio-bcm-iproc.o
		obj-$(CONFIG_INTEL_XWAY_PHY) += intel-xway.o
		obj-$(CONFIG_MDIO_HISI_FEMAC) += mdio-hisi-femac.o
		obj-$(CONFIG_MDIO_XGENE) += mdio-xgene.o
		obj-$(CONFIG_XILINX_GMII2RGMII) += xilinx_gmii2rgmii.o

drivers/net/phy/xilinx_gmii2rgmii.c

0 → 100644

+109 −0

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		/* Xilinx GMII2RGMII Converter driver
		*
		* Copyright (C) 2016 Xilinx, Inc.
		*
		* Author: Kedareswara rao Appana <appanad@xilinx.com>
		*
		* Description:
		* This driver is developed for Xilinx GMII2RGMII Converter
		*
		* This program is free software: you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation, either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/
		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/mii.h>
		#include <linux/mdio.h>
		#include <linux/phy.h>
		#include <linux/of_mdio.h>

		#define XILINX_GMII2RGMII_REG 0x10
		#define XILINX_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 \| BMCR_SPEED100)

		struct gmii2rgmii {
		struct phy_device *phy_dev;
		struct phy_driver *phy_drv;
		struct phy_driver conv_phy_drv;
		int addr;
		};

		static int xgmiitorgmii_read_status(struct phy_device *phydev)
		{
		struct gmii2rgmii *priv = phydev->priv;
		u16 val = 0;

		priv->phy_drv->read_status(phydev);

		val = mdiobus_read(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG);
		val &= XILINX_GMII2RGMII_SPEED_MASK;

		if (phydev->speed == SPEED_1000)
		val \|= BMCR_SPEED1000;
		else if (phydev->speed == SPEED_100)
		val \|= BMCR_SPEED100;
		else
		val \|= BMCR_SPEED10;

		mdiobus_write(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG, val);

		return 0;
		}

		int xgmiitorgmii_probe(struct mdio_device *mdiodev)
		{
		struct device *dev = &mdiodev->dev;
		struct device_node np = dev->of_node, phy_node;
		struct gmii2rgmii *priv;

		priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
		if (!priv)
		return -ENOMEM;

		phy_node = of_parse_phandle(np, "phy-handle", 0);
		if (IS_ERR(phy_node)) {
		dev_err(dev, "Couldn't parse phy-handle\n");
		return -ENODEV;
		}

		priv->phy_dev = of_phy_find_device(phy_node);
		if (!priv->phy_dev) {
		dev_info(dev, "Couldn't find phydev\n");
		return -EPROBE_DEFER;
		}

		priv->addr = mdiodev->addr;
		priv->phy_drv = priv->phy_dev->drv;
		memcpy(&priv->conv_phy_drv, priv->phy_dev->drv,
		sizeof(struct phy_driver));
		priv->conv_phy_drv.read_status = xgmiitorgmii_read_status;
		priv->phy_dev->priv = priv;
		priv->phy_dev->drv = &priv->conv_phy_drv;

		return 0;
		}

		static const struct of_device_id xgmiitorgmii_of_match[] = {
		{ .compatible = "xlnx,gmii-to-rgmii-1.0" },
		{},
		};
		MODULE_DEVICE_TABLE(of, xgmiitorgmii_of_match);

		static struct mdio_driver xgmiitorgmii_driver = {
		.probe = xgmiitorgmii_probe,
		.mdiodrv.driver = {
		.name = "xgmiitorgmii",
		.of_match_table = xgmiitorgmii_of_match,
		},
		};

		mdio_module_driver(xgmiitorgmii_driver);

		MODULE_DESCRIPTION("Xilinx GMII2RGMII converter driver");
		MODULE_LICENSE("GPL");

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