1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * drivers/net/phy/ste10Xp.c 4 * 5 * Driver for STMicroelectronics STe10Xp PHYs 6 * 7 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com> 8 * 9 * Copyright (c) 2008 STMicroelectronics Limited 10 */ 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 0x00061c50 28 #define STE100P_PHY_ID 0x1c040011 29 30 static 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 51 static int ste10Xp_config_intr(struct phy_device *phydev) 52 { 53 int err, value; 54 55 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) { 56 /* Enable all STe101P interrupts (PR12) */ 57 err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK); 58 /* clear any pending interrupts */ 59 if (err == 0) { 60 value = phy_read(phydev, MII_XCIIS); 61 if (value < 0) 62 err = value; 63 } 64 } else 65 err = phy_write(phydev, MII_XIE, 0); 66 67 return err; 68 } 69 70 static int ste10Xp_ack_interrupt(struct phy_device *phydev) 71 { 72 int err = phy_read(phydev, MII_XCIIS); 73 if (err < 0) 74 return err; 75 76 return 0; 77 } 78 79 static struct phy_driver ste10xp_pdriver[] = { 80 { 81 .phy_id = STE101P_PHY_ID, 82 .phy_id_mask = 0xfffffff0, 83 .name = "STe101p", 84 /* PHY_BASIC_FEATURES */ 85 .config_init = ste10Xp_config_init, 86 .ack_interrupt = ste10Xp_ack_interrupt, 87 .config_intr = ste10Xp_config_intr, 88 .suspend = genphy_suspend, 89 .resume = genphy_resume, 90 }, { 91 .phy_id = STE100P_PHY_ID, 92 .phy_id_mask = 0xffffffff, 93 .name = "STe100p", 94 /* PHY_BASIC_FEATURES */ 95 .config_init = ste10Xp_config_init, 96 .ack_interrupt = ste10Xp_ack_interrupt, 97 .config_intr = ste10Xp_config_intr, 98 .suspend = genphy_suspend, 99 .resume = genphy_resume, 100 } }; 101 102 module_phy_driver(ste10xp_pdriver); 103 104 static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = { 105 { STE101P_PHY_ID, 0xfffffff0 }, 106 { STE100P_PHY_ID, 0xffffffff }, 107 { } 108 }; 109 110 MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl); 111 112 MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver"); 113 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 114 MODULE_LICENSE("GPL"); 115