1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (C) 2018 Microchip Technology 3 4 #include <linux/kernel.h> 5 #include <linux/module.h> 6 #include <linux/mii.h> 7 #include <linux/phy.h> 8 9 /* Interrupt Source Register */ 10 #define LAN87XX_INTERRUPT_SOURCE (0x18) 11 12 /* Interrupt Mask Register */ 13 #define LAN87XX_INTERRUPT_MASK (0x19) 14 #define LAN87XX_MASK_LINK_UP (0x0004) 15 #define LAN87XX_MASK_LINK_DOWN (0x0002) 16 17 #define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>" 18 #define DRIVER_DESC "Microchip LAN87XX T1 PHY driver" 19 20 static int lan87xx_phy_config_intr(struct phy_device *phydev) 21 { 22 int rc, val = 0; 23 24 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { 25 /* unmask all source and clear them before enable */ 26 rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, 0x7FFF); 27 rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE); 28 val = LAN87XX_MASK_LINK_UP | LAN87XX_MASK_LINK_DOWN; 29 } 30 31 rc = phy_write(phydev, LAN87XX_INTERRUPT_MASK, val); 32 33 return rc < 0 ? rc : 0; 34 } 35 36 static int lan87xx_phy_ack_interrupt(struct phy_device *phydev) 37 { 38 int rc = phy_read(phydev, LAN87XX_INTERRUPT_SOURCE); 39 40 return rc < 0 ? rc : 0; 41 } 42 43 static struct phy_driver microchip_t1_phy_driver[] = { 44 { 45 .phy_id = 0x0007c150, 46 .phy_id_mask = 0xfffffff0, 47 .name = "Microchip LAN87xx T1", 48 49 .features = PHY_BASIC_T1_FEATURES, 50 51 .config_init = genphy_config_init, 52 .config_aneg = genphy_config_aneg, 53 54 .ack_interrupt = lan87xx_phy_ack_interrupt, 55 .config_intr = lan87xx_phy_config_intr, 56 57 .suspend = genphy_suspend, 58 .resume = genphy_resume, 59 } 60 }; 61 62 module_phy_driver(microchip_t1_phy_driver); 63 64 static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = { 65 { 0x0007c150, 0xfffffff0 }, 66 { } 67 }; 68 69 MODULE_DEVICE_TABLE(mdio, microchip_t1_tbl); 70 71 MODULE_AUTHOR(DRIVER_AUTHOR); 72 MODULE_DESCRIPTION(DRIVER_DESC); 73 MODULE_LICENSE("GPL"); 74