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_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 61 static 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 84 static 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 } 101 102 static 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 } }; 124 125 module_phy_driver(ste10xp_pdriver); 126 127 static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = { 128 { STE101P_PHY_ID, 0xfffffff0 }, 129 { STE100P_PHY_ID, 0xffffffff }, 130 { } 131 }; 132 133 MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl); 134 135 MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver"); 136 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>"); 137 MODULE_LICENSE("GPL"); 138