1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0+ 2dbb7a95dSChaithrika U S /* 3dbb7a95dSChaithrika U S * drivers/net/phy/et1011c.c 4dbb7a95dSChaithrika U S * 5dbb7a95dSChaithrika U S * Driver for LSI ET1011C PHYs 6dbb7a95dSChaithrika U S * 7dbb7a95dSChaithrika U S * Author: Chaithrika U S 8dbb7a95dSChaithrika U S * 9dbb7a95dSChaithrika U S * Copyright (c) 2008 Texas Instruments 10dbb7a95dSChaithrika U S */ 11dbb7a95dSChaithrika U S #include <linux/kernel.h> 12dbb7a95dSChaithrika U S #include <linux/string.h> 13dbb7a95dSChaithrika U S #include <linux/errno.h> 14dbb7a95dSChaithrika U S #include <linux/unistd.h> 15dbb7a95dSChaithrika U S #include <linux/interrupt.h> 16dbb7a95dSChaithrika U S #include <linux/init.h> 17dbb7a95dSChaithrika U S #include <linux/delay.h> 18dbb7a95dSChaithrika U S #include <linux/netdevice.h> 19dbb7a95dSChaithrika U S #include <linux/etherdevice.h> 20dbb7a95dSChaithrika U S #include <linux/skbuff.h> 21dbb7a95dSChaithrika U S #include <linux/spinlock.h> 22dbb7a95dSChaithrika U S #include <linux/mm.h> 23dbb7a95dSChaithrika U S #include <linux/module.h> 24dbb7a95dSChaithrika U S #include <linux/mii.h> 25dbb7a95dSChaithrika U S #include <linux/ethtool.h> 26dbb7a95dSChaithrika U S #include <linux/phy.h> 27dbb7a95dSChaithrika U S #include <linux/io.h> 28dbb7a95dSChaithrika U S #include <linux/uaccess.h> 29dbb7a95dSChaithrika U S #include <asm/irq.h> 30dbb7a95dSChaithrika U S 31dbb7a95dSChaithrika U S #define ET1011C_STATUS_REG (0x1A) 32dbb7a95dSChaithrika U S #define ET1011C_CONFIG_REG (0x16) 33dbb7a95dSChaithrika U S #define ET1011C_SPEED_MASK (0x0300) 34dbb7a95dSChaithrika U S #define ET1011C_GIGABIT_SPEED (0x0200) 35dbb7a95dSChaithrika U S #define ET1011C_TX_FIFO_MASK (0x3000) 36dbb7a95dSChaithrika U S #define ET1011C_TX_FIFO_DEPTH_8 (0x0000) 37dbb7a95dSChaithrika U S #define ET1011C_TX_FIFO_DEPTH_16 (0x1000) 38dbb7a95dSChaithrika U S #define ET1011C_INTERFACE_MASK (0x0007) 39dbb7a95dSChaithrika U S #define ET1011C_GMII_INTERFACE (0x0002) 40dbb7a95dSChaithrika U S #define ET1011C_SYS_CLK_EN (0x01 << 4) 41dbb7a95dSChaithrika U S 42dbb7a95dSChaithrika U S 43dbb7a95dSChaithrika U S MODULE_DESCRIPTION("LSI ET1011C PHY driver"); 44dbb7a95dSChaithrika U S MODULE_AUTHOR("Chaithrika U S"); 45dbb7a95dSChaithrika U S MODULE_LICENSE("GPL"); 46dbb7a95dSChaithrika U S 47dbb7a95dSChaithrika U S static int et1011c_config_aneg(struct phy_device *phydev) 48dbb7a95dSChaithrika U S { 49dbb7a95dSChaithrika U S int ctl = 0; 50dbb7a95dSChaithrika U S ctl = phy_read(phydev, MII_BMCR); 51dbb7a95dSChaithrika U S if (ctl < 0) 52dbb7a95dSChaithrika U S return ctl; 53dbb7a95dSChaithrika U S ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | 54dbb7a95dSChaithrika U S BMCR_ANENABLE); 55dbb7a95dSChaithrika U S /* First clear the PHY */ 56dbb7a95dSChaithrika U S phy_write(phydev, MII_BMCR, ctl | BMCR_RESET); 57dbb7a95dSChaithrika U S 58dbb7a95dSChaithrika U S return genphy_config_aneg(phydev); 59dbb7a95dSChaithrika U S } 60dbb7a95dSChaithrika U S 61dbb7a95dSChaithrika U S static int et1011c_read_status(struct phy_device *phydev) 62dbb7a95dSChaithrika U S { 63dbb7a95dSChaithrika U S int ret; 64dbb7a95dSChaithrika U S u32 val; 65dbb7a95dSChaithrika U S static int speed; 66dbb7a95dSChaithrika U S ret = genphy_read_status(phydev); 67dbb7a95dSChaithrika U S 68dbb7a95dSChaithrika U S if (speed != phydev->speed) { 69dbb7a95dSChaithrika U S speed = phydev->speed; 70dbb7a95dSChaithrika U S val = phy_read(phydev, ET1011C_STATUS_REG); 71dbb7a95dSChaithrika U S if ((val & ET1011C_SPEED_MASK) == 72dbb7a95dSChaithrika U S ET1011C_GIGABIT_SPEED) { 73dbb7a95dSChaithrika U S val = phy_read(phydev, ET1011C_CONFIG_REG); 74dbb7a95dSChaithrika U S val &= ~ET1011C_TX_FIFO_MASK; 75dbb7a95dSChaithrika U S phy_write(phydev, ET1011C_CONFIG_REG, val\ 76dbb7a95dSChaithrika U S | ET1011C_GMII_INTERFACE\ 77dbb7a95dSChaithrika U S | ET1011C_SYS_CLK_EN\ 78dbb7a95dSChaithrika U S | ET1011C_TX_FIFO_DEPTH_16); 79dbb7a95dSChaithrika U S 80dbb7a95dSChaithrika U S } 81dbb7a95dSChaithrika U S } 82dbb7a95dSChaithrika U S return ret; 83dbb7a95dSChaithrika U S } 84dbb7a95dSChaithrika U S 85116dffa0SJohan Hovold static struct phy_driver et1011c_driver[] = { { 86dbb7a95dSChaithrika U S .phy_id = 0x0282f014, 87dbb7a95dSChaithrika U S .name = "ET1011C", 88dbb7a95dSChaithrika U S .phy_id_mask = 0xfffffff0, 89dcdecdcfSHeiner Kallweit /* PHY_GBIT_FEATURES */ 90dbb7a95dSChaithrika U S .config_aneg = et1011c_config_aneg, 91dbb7a95dSChaithrika U S .read_status = et1011c_read_status, 92116dffa0SJohan Hovold } }; 93dbb7a95dSChaithrika U S 94116dffa0SJohan Hovold module_phy_driver(et1011c_driver); 954e4f10f6SDavid Woodhouse 96cf93c945SUwe Kleine-König static struct mdio_device_id __maybe_unused et1011c_tbl[] = { 974e4f10f6SDavid Woodhouse { 0x0282f014, 0xfffffff0 }, 984e4f10f6SDavid Woodhouse { } 994e4f10f6SDavid Woodhouse }; 1004e4f10f6SDavid Woodhouse 1014e4f10f6SDavid Woodhouse MODULE_DEVICE_TABLE(mdio, et1011c_tbl); 102