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/interrupt.h> 17 #include <linux/init.h> 18 #include <linux/delay.h> 19 #include <linux/netdevice.h> 20 #include <linux/etherdevice.h> 21 #include <linux/skbuff.h> 22 #include <linux/spinlock.h> 23 #include <linux/mm.h> 24 #include <linux/module.h> 25 #include <linux/mii.h> 26 #include <linux/ethtool.h> 27 #include <linux/phy.h> 28 29 #include <asm/io.h> 30 #include <asm/irq.h> 31 #include <asm/uaccess.h> 32 33 MODULE_DESCRIPTION("ICPlus IP175C PHY driver"); 34 MODULE_AUTHOR("Michael Barkowski"); 35 MODULE_LICENSE("GPL"); 36 37 static int ip175c_config_init(struct phy_device *phydev) 38 { 39 int err, i; 40 static int full_reset_performed = 0; 41 42 if (full_reset_performed == 0) { 43 44 /* master reset */ 45 err = phydev->bus->write(phydev->bus, 30, 0, 0x175c); 46 if (err < 0) 47 return err; 48 49 /* ensure no bus delays overlap reset period */ 50 err = phydev->bus->read(phydev->bus, 30, 0); 51 52 /* data sheet specifies reset period is 2 msec */ 53 mdelay(2); 54 55 /* enable IP175C mode */ 56 err = phydev->bus->write(phydev->bus, 29, 31, 0x175c); 57 if (err < 0) 58 return err; 59 60 /* Set MII0 speed and duplex (in PHY mode) */ 61 err = phydev->bus->write(phydev->bus, 29, 22, 0x420); 62 if (err < 0) 63 return err; 64 65 /* reset switch ports */ 66 for (i = 0; i < 5; i++) { 67 err = phydev->bus->write(phydev->bus, i, 68 MII_BMCR, BMCR_RESET); 69 if (err < 0) 70 return err; 71 } 72 73 for (i = 0; i < 5; i++) 74 err = phydev->bus->read(phydev->bus, i, MII_BMCR); 75 76 mdelay(2); 77 78 full_reset_performed = 1; 79 } 80 81 if (phydev->addr != 4) { 82 phydev->state = PHY_RUNNING; 83 phydev->speed = SPEED_100; 84 phydev->duplex = DUPLEX_FULL; 85 phydev->link = 1; 86 netif_carrier_on(phydev->attached_dev); 87 } 88 89 return 0; 90 } 91 92 static int ip175c_read_status(struct phy_device *phydev) 93 { 94 if (phydev->addr == 4) /* WAN port */ 95 genphy_read_status(phydev); 96 else 97 /* Don't need to read status for switch ports */ 98 phydev->irq = PHY_IGNORE_INTERRUPT; 99 100 return 0; 101 } 102 103 static int ip175c_config_aneg(struct phy_device *phydev) 104 { 105 if (phydev->addr == 4) /* WAN port */ 106 genphy_config_aneg(phydev); 107 108 return 0; 109 } 110 111 static struct phy_driver ip175c_driver = { 112 .phy_id = 0x02430d80, 113 .name = "ICPlus IP175C", 114 .phy_id_mask = 0x0ffffff0, 115 .features = PHY_BASIC_FEATURES, 116 .config_init = &ip175c_config_init, 117 .config_aneg = &ip175c_config_aneg, 118 .read_status = &ip175c_read_status, 119 .suspend = genphy_suspend, 120 .resume = genphy_resume, 121 .driver = { .owner = THIS_MODULE,}, 122 }; 123 124 static int __init ip175c_init(void) 125 { 126 return phy_driver_register(&ip175c_driver); 127 } 128 129 static void __exit ip175c_exit(void) 130 { 131 phy_driver_unregister(&ip175c_driver); 132 } 133 134 module_init(ip175c_init); 135 module_exit(ip175c_exit); 136 137 static struct mdio_device_id icplus_tbl[] = { 138 { 0x02430d80, 0x0ffffff0 }, 139 { } 140 }; 141 142 MODULE_DEVICE_TABLE(mdio, icplus_tbl); 143