1 /* 2 * drivers/net/phy/davicom.c 3 * 4 * Driver for Davicom 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/slab.h> 21 #include <linux/interrupt.h> 22 #include <linux/init.h> 23 #include <linux/delay.h> 24 #include <linux/netdevice.h> 25 #include <linux/etherdevice.h> 26 #include <linux/skbuff.h> 27 #include <linux/spinlock.h> 28 #include <linux/mm.h> 29 #include <linux/module.h> 30 #include <linux/mii.h> 31 #include <linux/ethtool.h> 32 #include <linux/phy.h> 33 34 #include <asm/io.h> 35 #include <asm/irq.h> 36 #include <asm/uaccess.h> 37 38 #define MII_DM9161_SCR 0x10 39 #define MII_DM9161_SCR_INIT 0x0610 40 41 /* DM9161 Interrupt Register */ 42 #define MII_DM9161_INTR 0x15 43 #define MII_DM9161_INTR_PEND 0x8000 44 #define MII_DM9161_INTR_DPLX_MASK 0x0800 45 #define MII_DM9161_INTR_SPD_MASK 0x0400 46 #define MII_DM9161_INTR_LINK_MASK 0x0200 47 #define MII_DM9161_INTR_MASK 0x0100 48 #define MII_DM9161_INTR_DPLX_CHANGE 0x0010 49 #define MII_DM9161_INTR_SPD_CHANGE 0x0008 50 #define MII_DM9161_INTR_LINK_CHANGE 0x0004 51 #define MII_DM9161_INTR_INIT 0x0000 52 #define MII_DM9161_INTR_STOP \ 53 (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \ 54 | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK) 55 56 /* DM9161 10BT Configuration/Status */ 57 #define MII_DM9161_10BTCSR 0x12 58 #define MII_DM9161_10BTCSR_INIT 0x7800 59 60 MODULE_DESCRIPTION("Davicom PHY driver"); 61 MODULE_AUTHOR("Andy Fleming"); 62 MODULE_LICENSE("GPL"); 63 64 65 #define DM9161_DELAY 1 66 static int dm9161_config_intr(struct phy_device *phydev) 67 { 68 int temp; 69 70 temp = phy_read(phydev, MII_DM9161_INTR); 71 72 if (temp < 0) 73 return temp; 74 75 if(PHY_INTERRUPT_ENABLED == phydev->interrupts ) 76 temp &= ~(MII_DM9161_INTR_STOP); 77 else 78 temp |= MII_DM9161_INTR_STOP; 79 80 temp = phy_write(phydev, MII_DM9161_INTR, temp); 81 82 return temp; 83 } 84 85 static int dm9161_config_aneg(struct phy_device *phydev) 86 { 87 int err; 88 89 /* Isolate the PHY */ 90 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE); 91 92 if (err < 0) 93 return err; 94 95 /* Configure the new settings */ 96 err = genphy_config_aneg(phydev); 97 98 if (err < 0) 99 return err; 100 101 return 0; 102 } 103 104 static int dm9161_config_init(struct phy_device *phydev) 105 { 106 int err; 107 108 /* Isolate the PHY */ 109 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE); 110 111 if (err < 0) 112 return err; 113 114 /* Do not bypass the scrambler/descrambler */ 115 err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT); 116 117 if (err < 0) 118 return err; 119 120 /* Clear 10BTCSR to default */ 121 err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT); 122 123 if (err < 0) 124 return err; 125 126 /* Reconnect the PHY, and enable Autonegotiation */ 127 err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE); 128 129 if (err < 0) 130 return err; 131 132 return 0; 133 } 134 135 static int dm9161_ack_interrupt(struct phy_device *phydev) 136 { 137 int err = phy_read(phydev, MII_DM9161_INTR); 138 139 return (err < 0) ? err : 0; 140 } 141 142 static struct phy_driver dm9161_driver = { 143 .phy_id = 0x0181b880, 144 .name = "Davicom DM9161E", 145 .phy_id_mask = 0x0ffffff0, 146 .features = PHY_BASIC_FEATURES, 147 .config_init = dm9161_config_init, 148 .config_aneg = dm9161_config_aneg, 149 .read_status = genphy_read_status, 150 .driver = { .owner = THIS_MODULE,}, 151 }; 152 153 static struct phy_driver dm9131_driver = { 154 .phy_id = 0x00181b80, 155 .name = "Davicom DM9131", 156 .phy_id_mask = 0x0ffffff0, 157 .features = PHY_BASIC_FEATURES, 158 .flags = PHY_HAS_INTERRUPT, 159 .config_aneg = genphy_config_aneg, 160 .read_status = genphy_read_status, 161 .ack_interrupt = dm9161_ack_interrupt, 162 .config_intr = dm9161_config_intr, 163 .driver = { .owner = THIS_MODULE,}, 164 }; 165 166 static int __init davicom_init(void) 167 { 168 int ret; 169 170 ret = phy_driver_register(&dm9161_driver); 171 if (ret) 172 goto err1; 173 174 ret = phy_driver_register(&dm9131_driver); 175 if (ret) 176 goto err2; 177 return 0; 178 179 err2: 180 phy_driver_unregister(&dm9161_driver); 181 err1: 182 return ret; 183 } 184 185 static void __exit davicom_exit(void) 186 { 187 phy_driver_unregister(&dm9161_driver); 188 phy_driver_unregister(&dm9131_driver); 189 } 190 191 module_init(davicom_init); 192 module_exit(davicom_exit); 193