1/*
2 * drivers/net/phy/lxt.c
3 *
4 * Driver for Intel LXT PHYs
5 *
6 * Author: Andy Fleming
7 *
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
9 *
10 * This program is free software; you can redistribute  it and/or modify it
11 * under  the terms of  the GNU General  Public License as published by the
12 * Free Software Foundation;  either version 2 of the  License, or (at your
13 * option) any later version.
14 *
15 */
16#include <linux/kernel.h>
17#include <linux/string.h>
18#include <linux/errno.h>
19#include <linux/unistd.h>
20#include <linux/slab.h>
21#include <linux/interrupt.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/skbuff.h>
27#include <linux/spinlock.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/phy.h>
33
34#include <asm/io.h>
35#include <asm/irq.h>
36#include <asm/uaccess.h>
37
38/* The Level one LXT970 is used by many boards				     */
39
40#define MII_LXT970_IER       17  /* Interrupt Enable Register */
41
42#define MII_LXT970_IER_IEN	0x0002
43
44#define MII_LXT970_ISR       18  /* Interrupt Status Register */
45
46#define MII_LXT970_CONFIG    19  /* Configuration Register    */
47
48/* ------------------------------------------------------------------------- */
49/* The Level one LXT971 is used on some of my custom boards                  */
50
51/* register definitions for the 971 */
52#define MII_LXT971_IER		18  /* Interrupt Enable Register */
53#define MII_LXT971_IER_IEN	0x00f2
54
55#define MII_LXT971_ISR		19  /* Interrupt Status Register */
56
57
58MODULE_DESCRIPTION("Intel LXT PHY driver");
59MODULE_AUTHOR("Andy Fleming");
60MODULE_LICENSE("GPL");
61
62static int lxt970_ack_interrupt(struct phy_device *phydev)
63{
64	int err;
65
66	err = phy_read(phydev, MII_BMSR);
67
68	if (err < 0)
69		return err;
70
71	err = phy_read(phydev, MII_LXT970_ISR);
72
73	if (err < 0)
74		return err;
75
76	return 0;
77}
78
79static int lxt970_config_intr(struct phy_device *phydev)
80{
81	int err;
82
83	if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
84		err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
85	else
86		err = phy_write(phydev, MII_LXT970_IER, 0);
87
88	return err;
89}
90
91static int lxt970_config_init(struct phy_device *phydev)
92{
93	int err;
94
95	err = phy_write(phydev, MII_LXT970_CONFIG, 0);
96
97	return err;
98}
99
100
101static int lxt971_ack_interrupt(struct phy_device *phydev)
102{
103	int err = phy_read(phydev, MII_LXT971_ISR);
104
105	if (err < 0)
106		return err;
107
108	return 0;
109}
110
111static int lxt971_config_intr(struct phy_device *phydev)
112{
113	int err;
114
115	if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
116		err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
117	else
118		err = phy_write(phydev, MII_LXT971_IER, 0);
119
120	return err;
121}
122
123static struct phy_driver lxt970_driver = {
124	.phy_id		= 0x78100000,
125	.name		= "LXT970",
126	.phy_id_mask	= 0xfffffff0,
127	.features	= PHY_BASIC_FEATURES,
128	.flags		= PHY_HAS_INTERRUPT,
129	.config_init	= lxt970_config_init,
130	.config_aneg	= genphy_config_aneg,
131	.read_status	= genphy_read_status,
132	.ack_interrupt	= lxt970_ack_interrupt,
133	.config_intr	= lxt970_config_intr,
134	.driver 	= { .owner = THIS_MODULE,},
135};
136
137static struct phy_driver lxt971_driver = {
138	.phy_id		= 0x001378e0,
139	.name		= "LXT971",
140	.phy_id_mask	= 0xfffffff0,
141	.features	= PHY_BASIC_FEATURES,
142	.flags		= PHY_HAS_INTERRUPT,
143	.config_aneg	= genphy_config_aneg,
144	.read_status	= genphy_read_status,
145	.ack_interrupt	= lxt971_ack_interrupt,
146	.config_intr	= lxt971_config_intr,
147	.driver 	= { .owner = THIS_MODULE,},
148};
149
150static int __init lxt_init(void)
151{
152	int ret;
153
154	ret = phy_driver_register(&lxt970_driver);
155	if (ret)
156		goto err1;
157
158	ret = phy_driver_register(&lxt971_driver);
159	if (ret)
160		goto err2;
161	return 0;
162
163 err2:
164	phy_driver_unregister(&lxt970_driver);
165 err1:
166	return ret;
167}
168
169static void __exit lxt_exit(void)
170{
171	phy_driver_unregister(&lxt970_driver);
172	phy_driver_unregister(&lxt971_driver);
173}
174
175module_init(lxt_init);
176module_exit(lxt_exit);
177