Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
34MODULE_DESCRIPTION("ICPlus IP175C PHY driver");
35MODULE_AUTHOR("Michael Barkowski");
36MODULE_LICENSE("GPL");
37
38static 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
93static 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
104static 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
112static 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
123static int __init ip175c_init(void)
124{
125 return phy_driver_register(&ip175c_driver);
126}
127
128static void __exit ip175c_exit(void)
129{
130 phy_driver_unregister(&ip175c_driver);
131}
132
133module_init(ip175c_init);
134module_exit(ip175c_exit);