1 /* 2 * drivers/net/phy/lxt.c 3 * 4 * Driver for Intel LXT PHYs 5 * 6 * Author: Andy Fleming 7 * 8 * Copyright (c) 2004 Freescale Semiconductor, Inc. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 */ 16 #include <linux/kernel.h> 17 #include <linux/string.h> 18 #include <linux/errno.h> 19 #include <linux/unistd.h> 20 #include <linux/interrupt.h> 21 #include <linux/init.h> 22 #include <linux/delay.h> 23 #include <linux/netdevice.h> 24 #include <linux/etherdevice.h> 25 #include <linux/skbuff.h> 26 #include <linux/spinlock.h> 27 #include <linux/mm.h> 28 #include <linux/module.h> 29 #include <linux/mii.h> 30 #include <linux/ethtool.h> 31 #include <linux/phy.h> 32 33 #include <asm/io.h> 34 #include <asm/irq.h> 35 #include <asm/uaccess.h> 36 37 /* The Level one LXT970 is used by many boards */ 38 39 #define MII_LXT970_IER 17 /* Interrupt Enable Register */ 40 41 #define MII_LXT970_IER_IEN 0x0002 42 43 #define MII_LXT970_ISR 18 /* Interrupt Status Register */ 44 45 #define MII_LXT970_CONFIG 19 /* Configuration Register */ 46 47 /* ------------------------------------------------------------------------- */ 48 /* The Level one LXT971 is used on some of my custom boards */ 49 50 /* register definitions for the 971 */ 51 #define MII_LXT971_IER 18 /* Interrupt Enable Register */ 52 #define MII_LXT971_IER_IEN 0x00f2 53 54 #define MII_LXT971_ISR 19 /* Interrupt Status Register */ 55 56 /* register definitions for the 973 */ 57 #define MII_LXT973_PCR 16 /* Port Configuration Register */ 58 #define PCR_FIBER_SELECT 1 59 60 MODULE_DESCRIPTION("Intel LXT PHY driver"); 61 MODULE_AUTHOR("Andy Fleming"); 62 MODULE_LICENSE("GPL"); 63 64 static int lxt970_ack_interrupt(struct phy_device *phydev) 65 { 66 int err; 67 68 err = phy_read(phydev, MII_BMSR); 69 70 if (err < 0) 71 return err; 72 73 err = phy_read(phydev, MII_LXT970_ISR); 74 75 if (err < 0) 76 return err; 77 78 return 0; 79 } 80 81 static int lxt970_config_intr(struct phy_device *phydev) 82 { 83 int err; 84 85 if(phydev->interrupts == PHY_INTERRUPT_ENABLED) 86 err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN); 87 else 88 err = phy_write(phydev, MII_LXT970_IER, 0); 89 90 return err; 91 } 92 93 static int lxt970_config_init(struct phy_device *phydev) 94 { 95 int err; 96 97 err = phy_write(phydev, MII_LXT970_CONFIG, 0); 98 99 return err; 100 } 101 102 103 static int lxt971_ack_interrupt(struct phy_device *phydev) 104 { 105 int err = phy_read(phydev, MII_LXT971_ISR); 106 107 if (err < 0) 108 return err; 109 110 return 0; 111 } 112 113 static int lxt971_config_intr(struct phy_device *phydev) 114 { 115 int err; 116 117 if(phydev->interrupts == PHY_INTERRUPT_ENABLED) 118 err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN); 119 else 120 err = phy_write(phydev, MII_LXT971_IER, 0); 121 122 return err; 123 } 124 125 static int lxt973_probe(struct phy_device *phydev) 126 { 127 int val = phy_read(phydev, MII_LXT973_PCR); 128 129 if (val & PCR_FIBER_SELECT) { 130 /* 131 * If fiber is selected, then the only correct setting 132 * is 100Mbps, full duplex, and auto negotiation off. 133 */ 134 val = phy_read(phydev, MII_BMCR); 135 val |= (BMCR_SPEED100 | BMCR_FULLDPLX); 136 val &= ~BMCR_ANENABLE; 137 phy_write(phydev, MII_BMCR, val); 138 /* Remember that the port is in fiber mode. */ 139 phydev->priv = lxt973_probe; 140 } else { 141 phydev->priv = NULL; 142 } 143 return 0; 144 } 145 146 static int lxt973_config_aneg(struct phy_device *phydev) 147 { 148 /* Do nothing if port is in fiber mode. */ 149 return phydev->priv ? 0 : genphy_config_aneg(phydev); 150 } 151 152 static struct phy_driver lxt970_driver = { 153 .phy_id = 0x78100000, 154 .name = "LXT970", 155 .phy_id_mask = 0xfffffff0, 156 .features = PHY_BASIC_FEATURES, 157 .flags = PHY_HAS_INTERRUPT, 158 .config_init = lxt970_config_init, 159 .config_aneg = genphy_config_aneg, 160 .read_status = genphy_read_status, 161 .ack_interrupt = lxt970_ack_interrupt, 162 .config_intr = lxt970_config_intr, 163 .driver = { .owner = THIS_MODULE,}, 164 }; 165 166 static struct phy_driver lxt971_driver = { 167 .phy_id = 0x001378e0, 168 .name = "LXT971", 169 .phy_id_mask = 0xfffffff0, 170 .features = PHY_BASIC_FEATURES, 171 .flags = PHY_HAS_INTERRUPT, 172 .config_aneg = genphy_config_aneg, 173 .read_status = genphy_read_status, 174 .ack_interrupt = lxt971_ack_interrupt, 175 .config_intr = lxt971_config_intr, 176 .driver = { .owner = THIS_MODULE,}, 177 }; 178 179 static struct phy_driver lxt973_driver = { 180 .phy_id = 0x00137a10, 181 .name = "LXT973", 182 .phy_id_mask = 0xfffffff0, 183 .features = PHY_BASIC_FEATURES, 184 .flags = 0, 185 .probe = lxt973_probe, 186 .config_aneg = lxt973_config_aneg, 187 .read_status = genphy_read_status, 188 .driver = { .owner = THIS_MODULE,}, 189 }; 190 191 static int __init lxt_init(void) 192 { 193 int ret; 194 195 ret = phy_driver_register(&lxt970_driver); 196 if (ret) 197 goto err1; 198 199 ret = phy_driver_register(&lxt971_driver); 200 if (ret) 201 goto err2; 202 203 ret = phy_driver_register(&lxt973_driver); 204 if (ret) 205 goto err3; 206 return 0; 207 208 err3: 209 phy_driver_unregister(&lxt971_driver); 210 err2: 211 phy_driver_unregister(&lxt970_driver); 212 err1: 213 return ret; 214 } 215 216 static void __exit lxt_exit(void) 217 { 218 phy_driver_unregister(&lxt970_driver); 219 phy_driver_unregister(&lxt971_driver); 220 phy_driver_unregister(&lxt973_driver); 221 } 222 223 module_init(lxt_init); 224 module_exit(lxt_exit); 225 226 static struct mdio_device_id lxt_tbl[] = { 227 { 0x78100000, 0xfffffff0 }, 228 { 0x001378e0, 0xfffffff0 }, 229 { 0x00137a10, 0xfffffff0 }, 230 { } 231 }; 232 233 MODULE_DEVICE_TABLE(mdio, lxt_tbl); 234