blob: 904208b95d4b81221fa96271492ee6fd85707cce [file] [log] [blame]
Michael Barkowski0cefeeb2007-05-11 18:24:51 -05001/*
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>
Michael Barkowski0cefeeb2007-05-11 18:24:51 -050016#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
33MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
34MODULE_AUTHOR("Michael Barkowski");
35MODULE_LICENSE("GPL");
36
37static 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
92static 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
103static 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
111static 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 .driver = { .owner = THIS_MODULE,},
120};
121
122static int __init ip175c_init(void)
123{
124 return phy_driver_register(&ip175c_driver);
125}
126
127static void __exit ip175c_exit(void)
128{
129 phy_driver_unregister(&ip175c_driver);
130}
131
132module_init(ip175c_init);
133module_exit(ip175c_exit);