// SPDX-License-Identifier: GPL-2.0
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// Copyright (C) 2018 Microchip Technology
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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/phy.h>
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/* Interrupt Source Register */
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#define LAN87XX_INTERRUPT_SOURCE (0x18)
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/* Interrupt Mask Register */
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#define LAN87XX_INTERRUPT_MASK (0x19)
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#define LAN87XX_MASK_LINK_UP (0x0004)
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#define LAN87XX_MASK_LINK_DOWN (0x0002)
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#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
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#define DRIVER_DESC "Microchip LAN87XX T1 PHY driver"
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static int lan87xx_phy_config_intr(struct phy_device *phydev)
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{
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int rc, val = 0;
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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, LAN87XX_INTERRUPT_MASK, 0x7FFF);
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rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
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val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN;
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}
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rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val);
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return rc < 0 ? rc : 0;
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}
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static int lan87xx_phy_ack_interrupt(struct phy_device *phydev)
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{
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int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE);
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return rc < 0 ? rc : 0;
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}
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static struct phy_driver microchip_t1_phy_driver[] = {
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{
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.phy_id = 0x0007c150,
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.phy_id_mask = 0xfffffff0,
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.name = "Microchip LAN87xx T1",
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.features = SUPPORTED_100baseT_Full,
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.flags = PHY_HAS_INTERRUPT,
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.config_init = genphy_config_init,
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.config_aneg = genphy_config_aneg,
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.ack_interrupt = lan87xx_phy_ack_interrupt,
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.config_intr = lan87xx_phy_config_intr,
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.suspend = genphy_suspend,
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.resume = genphy_resume,
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}
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};
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module_phy_driver(microchip_t1_phy_driver);
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static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
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{ 0x0007c150, 0xfffffff0 },
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{ }
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};
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MODULE_DEVICE_TABLE(mdio, microchip_t1_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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