2 * Driver for ICPlus PHYs
4 * Copyright (c) 2007 Freescale Semiconductor, Inc.
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.
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>
25 #include <linux/module.h>
26 #include <linux/mii.h>
27 #include <linux/ethtool.h>
28 #include <linux/phy.h>
32 #include <asm/uaccess.h>
34 MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
35 MODULE_AUTHOR("Michael Barkowski");
36 MODULE_LICENSE("GPL");
38 static int ip175c_config_init(struct phy_device *phydev)
41 static int full_reset_performed = 0;
43 if (full_reset_performed == 0) {
46 err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
50 /* ensure no bus delays overlap reset period */
51 err = phydev->bus->read(phydev->bus, 30, 0);
53 /* data sheet specifies reset period is 2 msec */
56 /* enable IP175C mode */
57 err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
61 /* Set MII0 speed and duplex (in PHY mode) */
62 err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
66 /* reset switch ports */
67 for (i = 0; i < 5; i++) {
68 err = phydev->bus->write(phydev->bus, i,
69 MII_BMCR, BMCR_RESET);
74 for (i = 0; i < 5; i++)
75 err = phydev->bus->read(phydev->bus, i, MII_BMCR);
79 full_reset_performed = 1;
82 if (phydev->addr != 4) {
83 phydev->state = PHY_RUNNING;
84 phydev->speed = SPEED_100;
85 phydev->duplex = DUPLEX_FULL;
87 netif_carrier_on(phydev->attached_dev);
93 static int ip175c_read_status(struct phy_device *phydev)
95 if (phydev->addr == 4) /* WAN port */
96 genphy_read_status(phydev);
98 /* Don't need to read status for switch ports */
99 phydev->irq = PHY_IGNORE_INTERRUPT;
104 static int ip175c_config_aneg(struct phy_device *phydev)
106 if (phydev->addr == 4) /* WAN port */
107 genphy_config_aneg(phydev);
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,},
123 static int __init ip175c_init(void)
125 return phy_driver_register(&ip175c_driver);
128 static void __exit ip175c_exit(void)
130 phy_driver_unregister(&ip175c_driver);
133 module_init(ip175c_init);
134 module_exit(ip175c_exit);