1 /* 2 * Driver for ICPlus PHYs 3 * 4 * Copyright (c) 2007 Freescale Semiconductor, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 */ 12 #include <linux/kernel.h> 13 #include <linux/string.h> 14 #include <linux/errno.h> 15 #include <linux/unistd.h> 16 #include <linux/slab.h> 17 #include <linux/interrupt.h> 18 #include <linux/init.h> 19 #include <linux/delay.h> 20 #include <linux/netdevice.h> 21 #include <linux/etherdevice.h> 22 #include <linux/skbuff.h> 23 #include <linux/spinlock.h> 24 #include <linux/mm.h> 25 #include <linux/module.h> 26 #include <linux/mii.h> 27 #include <linux/ethtool.h> 28 #include <linux/phy.h> 29 30 #include <asm/io.h> 31 #include <asm/irq.h> 32 #include <asm/uaccess.h> 33 34 MODULE_DESCRIPTION("ICPlus IP175C PHY driver"); 35 MODULE_AUTHOR("Michael Barkowski"); 36 MODULE_LICENSE("GPL"); 37 38 static int ip175c_config_init(struct phy_device *phydev) 39 { 40 int err, i; 41 static int full_reset_performed = 0; 42 43 if (full_reset_performed == 0) { 44 45 /* master reset */ 46 err = phydev->bus->write(phydev->bus, 30, 0, 0x175c); 47 if (err < 0) 48 return err; 49 50 /* ensure no bus delays overlap reset period */ 51 err = phydev->bus->read(phydev->bus, 30, 0); 52 53 /* data sheet specifies reset period is 2 msec */ 54 mdelay(2); 55 56 /* enable IP175C mode */ 57 err = phydev->bus->write(phydev->bus, 29, 31, 0x175c); 58 if (err < 0) 59 return err; 60 61 /* Set MII0 speed and duplex (in PHY mode) */ 62 err = phydev->bus->write(phydev->bus, 29, 22, 0x420); 63 if (err < 0) 64 return err; 65 66 /* reset switch ports */ 67 for (i = 0; i < 5; i++) { 68 err = phydev->bus->write(phydev->bus, i, 69 MII_BMCR, BMCR_RESET); 70 if (err < 0) 71 return err; 72 } 73 74 for (i = 0; i < 5; i++) 75 err = phydev->bus->read(phydev->bus, i, MII_BMCR); 76 77 mdelay(2); 78 79 full_reset_performed = 1; 80 } 81 82 if (phydev->addr != 4) { 83 phydev->state = PHY_RUNNING; 84 phydev->speed = SPEED_100; 85 phydev->duplex = DUPLEX_FULL; 86 phydev->link = 1; 87 netif_carrier_on(phydev->attached_dev); 88 } 89 90 return 0; 91 } 92 93 static int ip175c_read_status(struct phy_device *phydev) 94 { 95 if (phydev->addr == 4) /* WAN port */ 96 genphy_read_status(phydev); 97 else 98 /* Don't need to read status for switch ports */ 99 phydev->irq = PHY_IGNORE_INTERRUPT; 100 101 return 0; 102 } 103 104 static int ip175c_config_aneg(struct phy_device *phydev) 105 { 106 if (phydev->addr == 4) /* WAN port */ 107 genphy_config_aneg(phydev); 108 109 return 0; 110 } 111 112 static struct phy_driver ip175c_driver = { 113 .phy_id = 0x02430d80, 114 .name = "ICPlus IP175C", 115 .phy_id_mask = 0x0ffffff0, 116 .features = PHY_BASIC_FEATURES, 117 .config_init = &ip175c_config_init, 118 .config_aneg = &ip175c_config_aneg, 119 .read_status = &ip175c_read_status, 120 .driver = { .owner = THIS_MODULE,}, 121 }; 122 123 static int __init ip175c_init(void) 124 { 125 return phy_driver_register(&ip175c_driver); 126 } 127 128 static void __exit ip175c_exit(void) 129 { 130 phy_driver_unregister(&ip175c_driver); 131 } 132 133 module_init(ip175c_init); 134 module_exit(ip175c_exit); 135