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1// SPDX-License-Identifier: GPL-2.0+2/*3 * drivers/net/phy/ste10Xp.c4 *5 * Driver for STMicroelectronics STe10Xp PHYs6 *7 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>8 *9 * Copyright (c) 2008 STMicroelectronics Limited10 */11 12#include <linux/module.h>13#include <linux/init.h>14#include <linux/sched.h>15#include <linux/kernel.h>16#include <linux/moduleparam.h>17#include <linux/interrupt.h>18#include <linux/netdevice.h>19#include <linux/ethtool.h>20#include <linux/mii.h>21#include <linux/phy.h>22 23#define MII_XCIIS 0x11 /* Configuration Info IRQ & Status Reg */24#define MII_XIE 0x12 /* Interrupt Enable Register */25#define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */26 27#define STE101P_PHY_ID 0x00061c5028#define STE100P_PHY_ID 0x1c04001129 30static int ste10Xp_config_init(struct phy_device *phydev)31{32 int value, err;33 34 /* Software Reset PHY */35 value = phy_read(phydev, MII_BMCR);36 if (value < 0)37 return value;38 39 value |= BMCR_RESET;40 err = phy_write(phydev, MII_BMCR, value);41 if (err < 0)42 return err;43 44 do {45 value = phy_read(phydev, MII_BMCR);46 } while (value & BMCR_RESET);47 48 return 0;49}50 51static int ste10Xp_ack_interrupt(struct phy_device *phydev)52{53 int err = phy_read(phydev, MII_XCIIS);54 55 if (err < 0)56 return err;57 58 return 0;59}60 61static int ste10Xp_config_intr(struct phy_device *phydev)62{63 int err;64 65 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {66 /* clear any pending interrupts */67 err = ste10Xp_ack_interrupt(phydev);68 if (err)69 return err;70 71 /* Enable all STe101P interrupts (PR12) */72 err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);73 } else {74 err = phy_write(phydev, MII_XIE, 0);75 if (err)76 return err;77 78 err = ste10Xp_ack_interrupt(phydev);79 }80 81 return err;82}83 84static irqreturn_t ste10Xp_handle_interrupt(struct phy_device *phydev)85{86 int irq_status;87 88 irq_status = phy_read(phydev, MII_XCIIS);89 if (irq_status < 0) {90 phy_error(phydev);91 return IRQ_NONE;92 }93 94 if (!(irq_status & MII_XIE_DEFAULT_MASK))95 return IRQ_NONE;96 97 phy_trigger_machine(phydev);98 99 return IRQ_HANDLED;100}101 102static struct phy_driver ste10xp_pdriver[] = {103{104 .phy_id = STE101P_PHY_ID,105 .phy_id_mask = 0xfffffff0,106 .name = "STe101p",107 /* PHY_BASIC_FEATURES */108 .config_init = ste10Xp_config_init,109 .config_intr = ste10Xp_config_intr,110 .handle_interrupt = ste10Xp_handle_interrupt,111 .suspend = genphy_suspend,112 .resume = genphy_resume,113}, {114 .phy_id = STE100P_PHY_ID,115 .phy_id_mask = 0xffffffff,116 .name = "STe100p",117 /* PHY_BASIC_FEATURES */118 .config_init = ste10Xp_config_init,119 .config_intr = ste10Xp_config_intr,120 .handle_interrupt = ste10Xp_handle_interrupt,121 .suspend = genphy_suspend,122 .resume = genphy_resume,123} };124 125module_phy_driver(ste10xp_pdriver);126 127static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {128 { STE101P_PHY_ID, 0xfffffff0 },129 { STE100P_PHY_ID, 0xffffffff },130 { }131};132 133MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);134 135MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");136MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");137MODULE_LICENSE("GPL");138