1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * drivers/net/phy/et1011c.c 4 * 5 * Driver for LSI ET1011C PHYs 6 * 7 * Author: Chaithrika U S 8 * 9 * Copyright (c) 2008 Texas Instruments 10 */ 11 #include <linux/kernel.h> 12 #include <linux/string.h> 13 #include <linux/errno.h> 14 #include <linux/unistd.h> 15 #include <linux/interrupt.h> 16 #include <linux/init.h> 17 #include <linux/delay.h> 18 #include <linux/netdevice.h> 19 #include <linux/etherdevice.h> 20 #include <linux/skbuff.h> 21 #include <linux/spinlock.h> 22 #include <linux/mm.h> 23 #include <linux/module.h> 24 #include <linux/mii.h> 25 #include <linux/ethtool.h> 26 #include <linux/phy.h> 27 #include <linux/io.h> 28 #include <linux/uaccess.h> 29 #include <asm/irq.h> 30 31 #define ET1011C_STATUS_REG (0x1A) 32 #define ET1011C_CONFIG_REG (0x16) 33 #define ET1011C_SPEED_MASK (0x0300) 34 #define ET1011C_GIGABIT_SPEED (0x0200) 35 #define ET1011C_TX_FIFO_MASK (0x3000) 36 #define ET1011C_TX_FIFO_DEPTH_8 (0x0000) 37 #define ET1011C_TX_FIFO_DEPTH_16 (0x1000) 38 #define ET1011C_INTERFACE_MASK (0x0007) 39 #define ET1011C_GMII_INTERFACE (0x0002) 40 #define ET1011C_SYS_CLK_EN (0x01 << 4) 41 42 43 MODULE_DESCRIPTION("LSI ET1011C PHY driver"); 44 MODULE_AUTHOR("Chaithrika U S"); 45 MODULE_LICENSE("GPL"); 46 47 static int et1011c_config_aneg(struct phy_device *phydev) 48 { 49 int ctl = phy_read(phydev, MII_BMCR); 50 51 if (ctl < 0) 52 return ctl; 53 ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | 54 BMCR_ANENABLE); 55 /* First clear the PHY */ 56 phy_write(phydev, MII_BMCR, ctl | BMCR_RESET); 57 58 return genphy_config_aneg(phydev); 59 } 60 61 static int et1011c_read_status(struct phy_device *phydev) 62 { 63 static int speed; 64 int ret; 65 u32 val; 66 67 ret = genphy_read_status(phydev); 68 69 if (speed != phydev->speed) { 70 speed = phydev->speed; 71 val = phy_read(phydev, ET1011C_STATUS_REG); 72 if ((val & ET1011C_SPEED_MASK) == 73 ET1011C_GIGABIT_SPEED) { 74 val = phy_read(phydev, ET1011C_CONFIG_REG); 75 val &= ~ET1011C_TX_FIFO_MASK; 76 phy_write(phydev, ET1011C_CONFIG_REG, val | 77 ET1011C_GMII_INTERFACE | 78 ET1011C_SYS_CLK_EN | 79 ET1011C_TX_FIFO_DEPTH_16); 80 81 } 82 } 83 return ret; 84 } 85 86 static struct phy_driver et1011c_driver[] = { { 87 .phy_id = 0x0282f014, 88 .name = "ET1011C", 89 .phy_id_mask = 0xfffffff0, 90 /* PHY_GBIT_FEATURES */ 91 .config_aneg = et1011c_config_aneg, 92 .read_status = et1011c_read_status, 93 } }; 94 95 module_phy_driver(et1011c_driver); 96 97 static struct mdio_device_id __maybe_unused et1011c_tbl[] = { 98 { 0x0282f014, 0xfffffff0 }, 99 { } 100 }; 101 102 MODULE_DEVICE_TABLE(mdio, et1011c_tbl); 103