projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f411a616 ADKR |
1 | /* Xilinx GMII2RGMII Converter driver |
| 2 | * | |
| 3 | * Copyright (C) 2016 Xilinx, Inc. | |
| 4 | * | |
| 5 | * Author: Kedareswara rao Appana <appanad@xilinx.com> | |
| 6 | * | |
| 7 | * Description: | |
| 8 | * This driver is developed for Xilinx GMII2RGMII Converter | |
| 9 | * | |
| 10 | * This program is free software: you can redistribute it and/or modify | |
| 11 | * it under the terms of the GNU General Public License as published by | |
| 12 | * the Free Software Foundation, either version 2 of the License, or | |
| 13 | * (at your option) any later version. | |
| 14 | * | |
| 15 | * This program is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | * GNU General Public License for more details. | |
| 19 | */ | |
| 20 | #include <linux/module.h> | |
| 21 | #include <linux/kernel.h> | |
| 22 | #include <linux/mii.h> | |
| 23 | #include <linux/mdio.h> | |
| 24 | #include <linux/phy.h> | |
| 25 | #include <linux/of_mdio.h> | |
| 26 | ||
| 27 | #define XILINX_GMII2RGMII_REG 0x10 | |
| 28 | #define XILINX_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 | BMCR_SPEED100) | |
| 29 | ||
| 30 | struct gmii2rgmii { | |
| 31 | struct phy_device *phy_dev; | |
| 32 | struct phy_driver *phy_drv; | |
| 33 | struct phy_driver conv_phy_drv; | |
| 34 | int addr; | |
| 35 | }; | |
| 36 | ||
| 37 | static int xgmiitorgmii_read_status(struct phy_device *phydev) | |
| 38 | { | |
| 39 | struct gmii2rgmii *priv = phydev->priv; | |
| 40 | u16 val = 0; | |
| 41 | ||
| 42 | priv->phy_drv->read_status(phydev); | |
| 43 | ||
| 44 | val = mdiobus_read(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG); | |
| 45 | val &= XILINX_GMII2RGMII_SPEED_MASK; | |
| 46 | ||
| 47 | if (phydev->speed == SPEED_1000) | |
| 48 | val |= BMCR_SPEED1000; | |
| 49 | else if (phydev->speed == SPEED_100) | |
| 50 | val |= BMCR_SPEED100; | |
| 51 | else | |
| 52 | val |= BMCR_SPEED10; | |
| 53 | ||
| 54 | mdiobus_write(phydev->mdio.bus, priv->addr, XILINX_GMII2RGMII_REG, val); | |
| 55 | ||
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 59 | int xgmiitorgmii_probe(struct mdio_device *mdiodev) | |
| 60 | { | |
| 61 | struct device *dev = &mdiodev->dev; | |
| 62 | struct device_node *np = dev->of_node, *phy_node; | |
| 63 | struct gmii2rgmii *priv; | |
| 64 | ||
| 65 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); | |
| 66 | if (!priv) | |
| 67 | return -ENOMEM; | |
| 68 | ||
| 69 | phy_node = of_parse_phandle(np, "phy-handle", 0); | |
| 64721094 | 70 | if (!phy_node) { |
| f411a616 ADKR |
71 | dev_err(dev, "Couldn't parse phy-handle\n"); |
| 72 | return -ENODEV; | |
| 73 | } | |
| 74 | ||
| 75 | priv->phy_dev = of_phy_find_device(phy_node); | |
| 76 | if (!priv->phy_dev) { | |
| 77 | dev_info(dev, "Couldn't find phydev\n"); | |
| 78 | return -EPROBE_DEFER; | |
| 79 | } | |
| 80 | ||
| 81 | priv->addr = mdiodev->addr; | |
| 82 | priv->phy_drv = priv->phy_dev->drv; | |
| 83 | memcpy(&priv->conv_phy_drv, priv->phy_dev->drv, | |
| 84 | sizeof(struct phy_driver)); | |
| 85 | priv->conv_phy_drv.read_status = xgmiitorgmii_read_status; | |
| 86 | priv->phy_dev->priv = priv; | |
| 87 | priv->phy_dev->drv = &priv->conv_phy_drv; | |
| 88 | ||
| 89 | return 0; | |
| 90 | } | |
| 91 | ||
| 92 | static const struct of_device_id xgmiitorgmii_of_match[] = { | |
| 93 | { .compatible = "xlnx,gmii-to-rgmii-1.0" }, | |
| 94 | {}, | |
| 95 | }; | |
| 96 | MODULE_DEVICE_TABLE(of, xgmiitorgmii_of_match); | |
| 97 | ||
| 98 | static struct mdio_driver xgmiitorgmii_driver = { | |
| 99 | .probe = xgmiitorgmii_probe, | |
| 100 | .mdiodrv.driver = { | |
| 101 | .name = "xgmiitorgmii", | |
| 102 | .of_match_table = xgmiitorgmii_of_match, | |
| 103 | }, | |
| 104 | }; | |
| 105 | ||
| 106 | mdio_module_driver(xgmiitorgmii_driver); | |
| 107 | ||
| 108 | MODULE_DESCRIPTION("Xilinx GMII2RGMII converter driver"); | |
| 109 | MODULE_LICENSE("GPL"); |