146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/*
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* Copyright (C) 2015 Microchip Technology
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/microchipphy.h>
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#define DRIVER_AUTHOR "WOOJUNG HUH <woojung.huh@microchip.com>"
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#define DRIVER_DESC "Microchip LAN88XX PHY driver"
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struct lan88xx_priv {
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int chip_id;
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int chip_rev;
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__u32 wolopts;
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};
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static int lan88xx_phy_config_intr(struct phy_device *phydev)
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{
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int rc;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
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/* unmask all source and clear them before enable */
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rc = phy_write(phydev, LAN88XX_INT_MASK, 0x7FFF);
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rc = phy_read(phydev, LAN88XX_INT_STS);
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rc = phy_write(phydev, LAN88XX_INT_MASK,
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LAN88XX_INT_MASK_MDINTPIN_EN_ |
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LAN88XX_INT_MASK_LINK_CHANGE_);
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} else {
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rc = phy_write(phydev, LAN88XX_INT_MASK, 0);
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}
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return rc < 0 ? rc : 0;
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}
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static int lan88xx_phy_ack_interrupt(struct phy_device *phydev)
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{
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int rc = phy_read(phydev, LAN88XX_INT_STS);
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return rc < 0 ? rc : 0;
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}
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static int lan88xx_suspend(struct phy_device *phydev)
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{
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struct lan88xx_priv *priv = phydev->priv;
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/* do not power down PHY when WOL is enabled */
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if (!priv->wolopts)
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genphy_suspend(phydev);
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return 0;
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}
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static int lan88xx_probe(struct phy_device *phydev)
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{
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struct device *dev = &phydev->mdio.dev;
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struct lan88xx_priv *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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priv->wolopts = 0;
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/* these values can be used to identify internal PHY */
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priv->chip_id = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_ID, 3);
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priv->chip_rev = phy_read_mmd_indirect(phydev, LAN88XX_MMD3_CHIP_REV,
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3);
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phydev->priv = priv;
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return 0;
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}
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static void lan88xx_remove(struct phy_device *phydev)
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{
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struct device *dev = &phydev->mdio.dev;
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struct lan88xx_priv *priv = phydev->priv;
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if (priv)
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devm_kfree(dev, priv);
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}
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static int lan88xx_set_wol(struct phy_device *phydev,
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struct ethtool_wolinfo *wol)
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{
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struct lan88xx_priv *priv = phydev->priv;
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priv->wolopts = wol->wolopts;
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return 0;
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}
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static struct phy_driver microchip_phy_driver[] = {
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{
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.phy_id = 0x0007c130,
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.phy_id_mask = 0xfffffff0,
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.name = "Microchip LAN88xx",
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.features = (PHY_GBIT_FEATURES |
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SUPPORTED_Pause | SUPPORTED_Asym_Pause),
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.flags = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,
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.probe = lan88xx_probe,
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.remove = lan88xx_remove,
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.config_init = genphy_config_init,
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.config_aneg = genphy_config_aneg,
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.read_status = genphy_read_status,
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.ack_interrupt = lan88xx_phy_ack_interrupt,
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.config_intr = lan88xx_phy_config_intr,
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.suspend = lan88xx_suspend,
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.resume = genphy_resume,
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.set_wol = lan88xx_set_wol,
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} };
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module_phy_driver(microchip_phy_driver);
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static struct mdio_device_id __maybe_unused microchip_tbl[] = {
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{ 0x0007c130, 0xfffffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, microchip_tbl);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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