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/IC1001 PHY drivers"); 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 ip1001_config_init(struct phy_device *phydev) 93 { 94 int err, value; 95 96 /* Software Reset PHY */ 97 value = phy_read(phydev, MII_BMCR); 98 value |= BMCR_RESET; 99 err = phy_write(phydev, MII_BMCR, value); 100 if (err < 0) 101 return err; 102 103 do { 104 value = phy_read(phydev, MII_BMCR); 105 } while (value & BMCR_RESET); 106 107 /* Additional delay (2ns) used to adjust RX clock phase 108 * at GMII/ RGMII interface */ 109 value = phy_read(phydev, 16); 110 value |= 0x3; 111 112 err = phy_write(phydev, 16, value); 113 if (err < 0) 114 return err; 115 116 return err; 117 } 118 119 static int ip175c_read_status(struct phy_device *phydev) 120 { 121 if (phydev->addr == 4) /* WAN port */ 122 genphy_read_status(phydev); 123 else 124 /* Don't need to read status for switch ports */ 125 phydev->irq = PHY_IGNORE_INTERRUPT; 126 127 return 0; 128 } 129 130 static int ip175c_config_aneg(struct phy_device *phydev) 131 { 132 if (phydev->addr == 4) /* WAN port */ 133 genphy_config_aneg(phydev); 134 135 return 0; 136 } 137 138 static struct phy_driver ip175c_driver = { 139 .phy_id = 0x02430d80, 140 .name = "ICPlus IP175C", 141 .phy_id_mask = 0x0ffffff0, 142 .features = PHY_BASIC_FEATURES, 143 .config_init = &ip175c_config_init, 144 .config_aneg = &ip175c_config_aneg, 145 .read_status = &ip175c_read_status, 146 .suspend = genphy_suspend, 147 .resume = genphy_resume, 148 .driver = { .owner = THIS_MODULE,}, 149 }; 150 151 static struct phy_driver ip1001_driver = { 152 .phy_id = 0x02430d90, 153 .name = "ICPlus IP1001", 154 .phy_id_mask = 0x0ffffff0, 155 .features = PHY_GBIT_FEATURES | SUPPORTED_Pause | 156 SUPPORTED_Asym_Pause, 157 .config_init = &ip1001_config_init, 158 .config_aneg = &genphy_config_aneg, 159 .read_status = &genphy_read_status, 160 .suspend = genphy_suspend, 161 .resume = genphy_resume, 162 .driver = { .owner = THIS_MODULE,}, 163 }; 164 165 static int __init icplus_init(void) 166 { 167 int ret = 0; 168 169 ret = phy_driver_register(&ip1001_driver); 170 if (ret < 0) 171 return -ENODEV; 172 173 return phy_driver_register(&ip175c_driver); 174 } 175 176 static void __exit icplus_exit(void) 177 { 178 phy_driver_unregister(&ip1001_driver); 179 phy_driver_unregister(&ip175c_driver); 180 } 181 182 module_init(icplus_init); 183 module_exit(icplus_exit); 184 185 static struct mdio_device_id __maybe_unused icplus_tbl[] = { 186 { 0x02430d80, 0x0ffffff0 }, 187 { 0x02430d90, 0x0ffffff0 }, 188 { } 189 }; 190 191 MODULE_DEVICE_TABLE(mdio, icplus_tbl); 192