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140 lines
3.3 KiB
140 lines
3.3 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* Xilinx GMII2RGMII Converter driver |
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* |
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* Copyright (C) 2016 Xilinx, Inc. |
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* Copyright (C) 2016 Andrew Lunn <[email protected]> |
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* |
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* Author: Andrew Lunn <[email protected]> |
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* Author: Kedareswara rao Appana <[email protected]> |
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* |
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* Description: |
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* This driver is developed for Xilinx GMII2RGMII Converter |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/mii.h> |
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#include <linux/mdio.h> |
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#include <linux/phy.h> |
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#include <linux/of_mdio.h> |
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#define XILINX_GMII2RGMII_REG 0x10 |
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#define XILINX_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 | BMCR_SPEED100) |
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struct gmii2rgmii { |
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struct phy_device *phy_dev; |
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struct phy_driver *phy_drv; |
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struct phy_driver conv_phy_drv; |
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struct mdio_device *mdio; |
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}; |
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static void xgmiitorgmii_configure(struct gmii2rgmii *priv, int speed) |
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{ |
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struct mii_bus *bus = priv->mdio->bus; |
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int addr = priv->mdio->addr; |
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u16 val; |
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val = mdiobus_read(bus, addr, XILINX_GMII2RGMII_REG); |
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val &= ~XILINX_GMII2RGMII_SPEED_MASK; |
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if (speed == SPEED_1000) |
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val |= BMCR_SPEED1000; |
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else if (speed == SPEED_100) |
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val |= BMCR_SPEED100; |
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else |
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val |= BMCR_SPEED10; |
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mdiobus_write(bus, addr, XILINX_GMII2RGMII_REG, val); |
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} |
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static int xgmiitorgmii_read_status(struct phy_device *phydev) |
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{ |
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struct gmii2rgmii *priv = mdiodev_get_drvdata(&phydev->mdio); |
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int err; |
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if (priv->phy_drv->read_status) |
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err = priv->phy_drv->read_status(phydev); |
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else |
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err = genphy_read_status(phydev); |
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if (err < 0) |
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return err; |
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xgmiitorgmii_configure(priv, phydev->speed); |
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return 0; |
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} |
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static int xgmiitorgmii_set_loopback(struct phy_device *phydev, bool enable) |
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{ |
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struct gmii2rgmii *priv = mdiodev_get_drvdata(&phydev->mdio); |
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int err; |
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if (priv->phy_drv->set_loopback) |
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err = priv->phy_drv->set_loopback(phydev, enable); |
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else |
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err = genphy_loopback(phydev, enable); |
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if (err < 0) |
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return err; |
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xgmiitorgmii_configure(priv, phydev->speed); |
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return 0; |
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} |
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static int xgmiitorgmii_probe(struct mdio_device *mdiodev) |
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{ |
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struct device *dev = &mdiodev->dev; |
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struct device_node *np = dev->of_node, *phy_node; |
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struct gmii2rgmii *priv; |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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phy_node = of_parse_phandle(np, "phy-handle", 0); |
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if (!phy_node) { |
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dev_err(dev, "Couldn't parse phy-handle\n"); |
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return -ENODEV; |
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} |
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priv->phy_dev = of_phy_find_device(phy_node); |
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of_node_put(phy_node); |
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if (!priv->phy_dev) { |
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dev_info(dev, "Couldn't find phydev\n"); |
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return -EPROBE_DEFER; |
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} |
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if (!priv->phy_dev->drv) { |
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dev_info(dev, "Attached phy not ready\n"); |
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return -EPROBE_DEFER; |
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} |
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priv->mdio = mdiodev; |
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priv->phy_drv = priv->phy_dev->drv; |
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memcpy(&priv->conv_phy_drv, priv->phy_dev->drv, |
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sizeof(struct phy_driver)); |
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priv->conv_phy_drv.read_status = xgmiitorgmii_read_status; |
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priv->conv_phy_drv.set_loopback = xgmiitorgmii_set_loopback; |
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mdiodev_set_drvdata(&priv->phy_dev->mdio, priv); |
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priv->phy_dev->drv = &priv->conv_phy_drv; |
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return 0; |
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} |
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static const struct of_device_id xgmiitorgmii_of_match[] = { |
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{ .compatible = "xlnx,gmii-to-rgmii-1.0" }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, xgmiitorgmii_of_match); |
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static struct mdio_driver xgmiitorgmii_driver = { |
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.probe = xgmiitorgmii_probe, |
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.mdiodrv.driver = { |
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.name = "xgmiitorgmii", |
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.of_match_table = xgmiitorgmii_of_match, |
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}, |
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}; |
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mdio_module_driver(xgmiitorgmii_driver); |
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MODULE_DESCRIPTION("Xilinx GMII2RGMII converter driver"); |
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MODULE_LICENSE("GPL");
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