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1// SPDX-License-Identifier: GPL-2.0+2/*3 * drivers/net/phy/et1011c.c4 *5 * Driver for LSI ET1011C PHYs6 *7 * Author: Chaithrika U S8 *9 * Copyright (c) 2008 Texas Instruments10 */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 43MODULE_DESCRIPTION("LSI ET1011C PHY driver");44MODULE_AUTHOR("Chaithrika U S");45MODULE_LICENSE("GPL");46 47static 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 61static 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 86static 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 95module_phy_driver(et1011c_driver);96 97static struct mdio_device_id __maybe_unused et1011c_tbl[] = {98 { 0x0282f014, 0xfffffff0 },99 { }100};101 102MODULE_DEVICE_TABLE(mdio, et1011c_tbl);103