1 /* 2 * drivers/net/phy/marvell.c 3 * 4 * Driver for Marvell 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/config.h> 17 #include <linux/kernel.h> 18 #include <linux/sched.h> 19 #include <linux/string.h> 20 #include <linux/errno.h> 21 #include <linux/unistd.h> 22 #include <linux/slab.h> 23 #include <linux/interrupt.h> 24 #include <linux/init.h> 25 #include <linux/delay.h> 26 #include <linux/netdevice.h> 27 #include <linux/etherdevice.h> 28 #include <linux/skbuff.h> 29 #include <linux/spinlock.h> 30 #include <linux/mm.h> 31 #include <linux/module.h> 32 #include <linux/mii.h> 33 #include <linux/ethtool.h> 34 #include <linux/phy.h> 35 36 #include <asm/io.h> 37 #include <asm/irq.h> 38 #include <asm/uaccess.h> 39 40 #define MII_M1011_IEVENT 0x13 41 #define MII_M1011_IEVENT_CLEAR 0x0000 42 43 #define MII_M1011_IMASK 0x12 44 #define MII_M1011_IMASK_INIT 0x6400 45 #define MII_M1011_IMASK_CLEAR 0x0000 46 47 MODULE_DESCRIPTION("Marvell PHY driver"); 48 MODULE_AUTHOR("Andy Fleming"); 49 MODULE_LICENSE("GPL"); 50 51 static int marvell_ack_interrupt(struct phy_device *phydev) 52 { 53 int err; 54 55 /* Clear the interrupts by reading the reg */ 56 err = phy_read(phydev, MII_M1011_IEVENT); 57 58 if (err < 0) 59 return err; 60 61 return 0; 62 } 63 64 static int marvell_config_intr(struct phy_device *phydev) 65 { 66 int err; 67 68 if(phydev->interrupts == PHY_INTERRUPT_ENABLED) 69 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_INIT); 70 else 71 err = phy_write(phydev, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR); 72 73 return err; 74 } 75 76 static int marvell_config_aneg(struct phy_device *phydev) 77 { 78 int err; 79 80 /* The Marvell PHY has an errata which requires 81 * that certain registers get written in order 82 * to restart autonegotiation */ 83 err = phy_write(phydev, MII_BMCR, BMCR_RESET); 84 85 if (err < 0) 86 return err; 87 88 err = phy_write(phydev, 0x1d, 0x1f); 89 if (err < 0) 90 return err; 91 92 err = phy_write(phydev, 0x1e, 0x200c); 93 if (err < 0) 94 return err; 95 96 err = phy_write(phydev, 0x1d, 0x5); 97 if (err < 0) 98 return err; 99 100 err = phy_write(phydev, 0x1e, 0); 101 if (err < 0) 102 return err; 103 104 err = phy_write(phydev, 0x1e, 0x100); 105 if (err < 0) 106 return err; 107 108 109 err = genphy_config_aneg(phydev); 110 111 return err; 112 } 113 114 115 static struct phy_driver m88e1101_driver = { 116 .phy_id = 0x01410c00, 117 .phy_id_mask = 0xffffff00, 118 .name = "Marvell 88E1101", 119 .features = PHY_GBIT_FEATURES, 120 .flags = PHY_HAS_INTERRUPT, 121 .config_aneg = &marvell_config_aneg, 122 .read_status = &genphy_read_status, 123 .ack_interrupt = &marvell_ack_interrupt, 124 .config_intr = &marvell_config_intr, 125 .driver = { .owner = THIS_MODULE,}, 126 }; 127 128 static int __init marvell_init(void) 129 { 130 return phy_driver_register(&m88e1101_driver); 131 } 132 133 static void __exit marvell_exit(void) 134 { 135 phy_driver_unregister(&m88e1101_driver); 136 } 137 138 module_init(marvell_init); 139 module_exit(marvell_exit); 140