1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * ET1011C PHY driver 4 * 5 * Derived from Linux kernel driver by Chaithrika U S 6 * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/ 7 */ 8 #include <config.h> 9 #include <phy.h> 10 11 #define ET1011C_CONFIG_REG (0x16) 12 #define ET1011C_TX_FIFO_MASK (0x3 << 12) 13 #define ET1011C_TX_FIFO_DEPTH_8 (0x0 << 12) 14 #define ET1011C_TX_FIFO_DEPTH_16 (0x1 << 12) 15 #define ET1011C_INTERFACE_MASK (0x7 << 0) 16 #define ET1011C_GMII_INTERFACE (0x2 << 0) 17 #define ET1011C_SYS_CLK_EN (0x1 << 4) 18 #define ET1011C_TX_CLK_EN (0x1 << 5) 19 20 #define ET1011C_STATUS_REG (0x1A) 21 #define ET1011C_DUPLEX_STATUS (0x1 << 7) 22 #define ET1011C_SPEED_MASK (0x3 << 8) 23 #define ET1011C_SPEED_1000 (0x2 << 8) 24 #define ET1011C_SPEED_100 (0x1 << 8) 25 #define ET1011C_SPEED_10 (0x0 << 8) 26 27 static int et1011c_config(struct phy_device *phydev) 28 { 29 int ctl = 0; 30 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); 31 if (ctl < 0) 32 return ctl; 33 ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | 34 BMCR_ANENABLE); 35 /* First clear the PHY */ 36 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl | BMCR_RESET); 37 38 return genphy_config_aneg(phydev); 39 } 40 41 static int et1011c_parse_status(struct phy_device *phydev) 42 { 43 int mii_reg; 44 int speed; 45 46 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_STATUS_REG); 47 48 if (mii_reg & ET1011C_DUPLEX_STATUS) 49 phydev->duplex = DUPLEX_FULL; 50 else 51 phydev->duplex = DUPLEX_HALF; 52 53 speed = mii_reg & ET1011C_SPEED_MASK; 54 switch (speed) { 55 case ET1011C_SPEED_1000: 56 phydev->speed = SPEED_1000; 57 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG); 58 mii_reg &= ~ET1011C_TX_FIFO_MASK; 59 phy_write(phydev, MDIO_DEVAD_NONE, ET1011C_CONFIG_REG, 60 mii_reg | 61 ET1011C_GMII_INTERFACE | 62 ET1011C_SYS_CLK_EN | 63 #ifdef CONFIG_PHY_ET1011C_TX_CLK_FIX 64 ET1011C_TX_CLK_EN | 65 #endif 66 ET1011C_TX_FIFO_DEPTH_16); 67 break; 68 case ET1011C_SPEED_100: 69 phydev->speed = SPEED_100; 70 break; 71 case ET1011C_SPEED_10: 72 phydev->speed = SPEED_10; 73 break; 74 } 75 76 return 0; 77 } 78 79 static int et1011c_startup(struct phy_device *phydev) 80 { 81 int ret; 82 83 ret = genphy_update_link(phydev); 84 if (ret) 85 return ret; 86 87 return et1011c_parse_status(phydev); 88 } 89 90 static struct phy_driver et1011c_driver = { 91 .name = "ET1011C", 92 .uid = 0x0282f014, 93 .mask = 0xfffffff0, 94 .features = PHY_GBIT_FEATURES, 95 .config = &et1011c_config, 96 .startup = &et1011c_startup, 97 }; 98 99 int phy_et1011c_init(void) 100 { 101 phy_register(&et1011c_driver); 102 103 return 0; 104 } 105