1 /* 2 * Driver for Vitesse PHYs 3 * 4 * Author: Kriston Carson 5 * 6 * Copyright (c) 2005, 2009 Freescale Semiconductor, Inc. 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License as published by the 10 * Free Software Foundation; either version 2 of the License, or (at your 11 * option) any later version. 12 * 13 */ 14 15 #include <linux/kernel.h> 16 #include <linux/module.h> 17 #include <linux/mii.h> 18 #include <linux/ethtool.h> 19 #include <linux/phy.h> 20 21 /* Vitesse Extended Control Register 1 */ 22 #define MII_VSC8244_EXT_CON1 0x17 23 #define MII_VSC8244_EXTCON1_INIT 0x0000 24 #define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00 25 #define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300 26 #define MII_VSC8244_EXTCON1_TX_SKEW 0x0800 27 #define MII_VSC8244_EXTCON1_RX_SKEW 0x0200 28 29 /* Vitesse Interrupt Mask Register */ 30 #define MII_VSC8244_IMASK 0x19 31 #define MII_VSC8244_IMASK_IEN 0x8000 32 #define MII_VSC8244_IMASK_SPEED 0x4000 33 #define MII_VSC8244_IMASK_LINK 0x2000 34 #define MII_VSC8244_IMASK_DUPLEX 0x1000 35 #define MII_VSC8244_IMASK_MASK 0xf000 36 37 #define MII_VSC8221_IMASK_MASK 0xa000 38 39 /* Vitesse Interrupt Status Register */ 40 #define MII_VSC8244_ISTAT 0x1a 41 #define MII_VSC8244_ISTAT_STATUS 0x8000 42 #define MII_VSC8244_ISTAT_SPEED 0x4000 43 #define MII_VSC8244_ISTAT_LINK 0x2000 44 #define MII_VSC8244_ISTAT_DUPLEX 0x1000 45 46 /* Vitesse Auxiliary Control/Status Register */ 47 #define MII_VSC8244_AUX_CONSTAT 0x1c 48 #define MII_VSC8244_AUXCONSTAT_INIT 0x0000 49 #define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020 50 #define MII_VSC8244_AUXCONSTAT_SPEED 0x0018 51 #define MII_VSC8244_AUXCONSTAT_GBIT 0x0010 52 #define MII_VSC8244_AUXCONSTAT_100 0x0008 53 54 #define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */ 55 #define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004 56 57 #define PHY_ID_VSC8244 0x000fc6c0 58 #define PHY_ID_VSC8221 0x000fc550 59 60 MODULE_DESCRIPTION("Vitesse PHY driver"); 61 MODULE_AUTHOR("Kriston Carson"); 62 MODULE_LICENSE("GPL"); 63 64 int vsc824x_add_skew(struct phy_device *phydev) 65 { 66 int err; 67 int extcon; 68 69 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1); 70 71 if (extcon < 0) 72 return extcon; 73 74 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK | 75 MII_VSC8244_EXTCON1_RX_SKEW_MASK); 76 77 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW | 78 MII_VSC8244_EXTCON1_RX_SKEW); 79 80 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon); 81 82 return err; 83 } 84 EXPORT_SYMBOL(vsc824x_add_skew); 85 86 static int vsc824x_config_init(struct phy_device *phydev) 87 { 88 int err; 89 90 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT, 91 MII_VSC8244_AUXCONSTAT_INIT); 92 if (err < 0) 93 return err; 94 95 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) 96 err = vsc824x_add_skew(phydev); 97 98 return err; 99 } 100 101 static int vsc824x_ack_interrupt(struct phy_device *phydev) 102 { 103 int err = 0; 104 105 /* 106 * Don't bother to ACK the interrupts if interrupts 107 * are disabled. The 824x cannot clear the interrupts 108 * if they are disabled. 109 */ 110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 111 err = phy_read(phydev, MII_VSC8244_ISTAT); 112 113 return (err < 0) ? err : 0; 114 } 115 116 static int vsc82xx_config_intr(struct phy_device *phydev) 117 { 118 int err; 119 120 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) 121 err = phy_write(phydev, MII_VSC8244_IMASK, 122 phydev->drv->phy_id == PHY_ID_VSC8244 ? 123 MII_VSC8244_IMASK_MASK : 124 MII_VSC8221_IMASK_MASK); 125 else { 126 /* 127 * The Vitesse PHY cannot clear the interrupt 128 * once it has disabled them, so we clear them first 129 */ 130 err = phy_read(phydev, MII_VSC8244_ISTAT); 131 132 if (err < 0) 133 return err; 134 135 err = phy_write(phydev, MII_VSC8244_IMASK, 0); 136 } 137 138 return err; 139 } 140 141 static int vsc8221_config_init(struct phy_device *phydev) 142 { 143 int err; 144 145 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT, 146 MII_VSC8221_AUXCONSTAT_INIT); 147 return err; 148 149 /* Perhaps we should set EXT_CON1 based on the interface? 150 Options are 802.3Z SerDes or SGMII */ 151 } 152 153 /* Vitesse 824x */ 154 static struct phy_driver vsc82xx_driver[] = { 155 { 156 .phy_id = PHY_ID_VSC8244, 157 .name = "Vitesse VSC8244", 158 .phy_id_mask = 0x000fffc0, 159 .features = PHY_GBIT_FEATURES, 160 .flags = PHY_HAS_INTERRUPT, 161 .config_init = &vsc824x_config_init, 162 .config_aneg = &genphy_config_aneg, 163 .read_status = &genphy_read_status, 164 .ack_interrupt = &vsc824x_ack_interrupt, 165 .config_intr = &vsc82xx_config_intr, 166 .driver = { .owner = THIS_MODULE,}, 167 }, { 168 /* Vitesse 8221 */ 169 .phy_id = PHY_ID_VSC8221, 170 .phy_id_mask = 0x000ffff0, 171 .name = "Vitesse VSC8221", 172 .features = PHY_GBIT_FEATURES, 173 .flags = PHY_HAS_INTERRUPT, 174 .config_init = &vsc8221_config_init, 175 .config_aneg = &genphy_config_aneg, 176 .read_status = &genphy_read_status, 177 .ack_interrupt = &vsc824x_ack_interrupt, 178 .config_intr = &vsc82xx_config_intr, 179 .driver = { .owner = THIS_MODULE,}, 180 } }; 181 182 static int __init vsc82xx_init(void) 183 { 184 return phy_drivers_register(vsc82xx_driver, 185 ARRAY_SIZE(vsc82xx_driver)); 186 } 187 188 static void __exit vsc82xx_exit(void) 189 { 190 return phy_drivers_unregister(vsc82xx_driver, 191 ARRAY_SIZE(vsc82xx_driver)); 192 } 193 194 module_init(vsc82xx_init); 195 module_exit(vsc82xx_exit); 196 197 static struct mdio_device_id __maybe_unused vitesse_tbl[] = { 198 { PHY_ID_VSC8244, 0x000fffc0 }, 199 { PHY_ID_VSC8221, 0x000ffff0 }, 200 { } 201 }; 202 203 MODULE_DEVICE_TABLE(mdio, vitesse_tbl); 204