aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/phy/lxt.c
blob: 6d1e3fcc43e237b8076c2be6a2b5c41db5473d38 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
 * drivers/net/phy/lxt.c
 *
 * Driver for Intel LXT PHYs
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

/* The Level one LXT970 is used by many boards				     */

#define MII_LXT970_IER       17  /* Interrupt Enable Register */

#define MII_LXT970_IER_IEN	0x0002

#define MII_LXT970_ISR       18  /* Interrupt Status Register */

#define MII_LXT970_CONFIG    19  /* Configuration Register    */

/* ------------------------------------------------------------------------- */
/* The Level one LXT971 is used on some of my custom boards                  */

/* register definitions for the 971 */
#define MII_LXT971_IER		18  /* Interrupt Enable Register */
#define MII_LXT971_IER_IEN	0x00f2

#define MII_LXT971_ISR		19  /* Interrupt Status Register */

/* register definitions for the 973 */
#define MII_LXT973_PCR 16 /* Port Configuration Register */
#define PCR_FIBER_SELECT 1

MODULE_DESCRIPTION("Intel LXT PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");

static int lxt970_ack_interrupt(struct phy_device *phydev)
{
	int err;

	err = phy_read(phydev, MII_BMSR);

	if (err < 0)
		return err;

	err = phy_read(phydev, MII_LXT970_ISR);

	if (err < 0)
		return err;

	return 0;
}

static int lxt970_config_intr(struct phy_device *phydev)
{
	int err;

	if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
		err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
	else
		err = phy_write(phydev, MII_LXT970_IER, 0);

	return err;
}

static int lxt970_config_init(struct phy_device *phydev)
{
	int err;

	err = phy_write(phydev, MII_LXT970_CONFIG, 0);

	return err;
}


static int lxt971_ack_interrupt(struct phy_device *phydev)
{
	int err = phy_read(phydev, MII_LXT971_ISR);

	if (err < 0)
		return err;

	return 0;
}

static int lxt971_config_intr(struct phy_device *phydev)
{
	int err;

	if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
		err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
	else
		err = phy_write(phydev, MII_LXT971_IER, 0);

	return err;
}

static int lxt973_probe(struct phy_device *phydev)
{
	int val = phy_read(phydev, MII_LXT973_PCR);

	if (val & PCR_FIBER_SELECT) {
		/*
		 * If fiber is selected, then the only correct setting
		 * is 100Mbps, full duplex, and auto negotiation off.
		 */
		val = phy_read(phydev, MII_BMCR);
		val |= (BMCR_SPEED100 | BMCR_FULLDPLX);
		val &= ~BMCR_ANENABLE;
		phy_write(phydev, MII_BMCR, val);
		/* Remember that the port is in fiber mode. */
		phydev->priv = lxt973_probe;
	} else {
		phydev->priv = NULL;
	}
	return 0;
}

static int lxt973_config_aneg(struct phy_device *phydev)
{
	/* Do nothing if port is in fiber mode. */
	return phydev->priv ? 0 : genphy_config_aneg(phydev);
}

static struct phy_driver lxt97x_driver[] = {
{
	.phy_id		= 0x78100000,
	.name		= "LXT970",
	.phy_id_mask	= 0xfffffff0,
	.features	= PHY_BASIC_FEATURES,
	.flags		= PHY_HAS_INTERRUPT,
	.config_init	= lxt970_config_init,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= lxt970_ack_interrupt,
	.config_intr	= lxt970_config_intr,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= 0x001378e0,
	.name		= "LXT971",
	.phy_id_mask	= 0xfffffff0,
	.features	= PHY_BASIC_FEATURES,
	.flags		= PHY_HAS_INTERRUPT,
	.config_aneg	= genphy_config_aneg,
	.read_status	= genphy_read_status,
	.ack_interrupt	= lxt971_ack_interrupt,
	.config_intr	= lxt971_config_intr,
	.driver		= { .owner = THIS_MODULE,},
}, {
	.phy_id		= 0x00137a10,
	.name		= "LXT973",
	.phy_id_mask	= 0xfffffff0,
	.features	= PHY_BASIC_FEATURES,
	.flags		= 0,
	.probe		= lxt973_probe,
	.config_aneg	= lxt973_config_aneg,
	.read_status	= genphy_read_status,
	.driver		= { .owner = THIS_MODULE,},
} };

static int __init lxt_init(void)
{
	return phy_drivers_register(lxt97x_driver,
		ARRAY_SIZE(lxt97x_driver));
}

static void __exit lxt_exit(void)
{
	phy_drivers_unregister(lxt97x_driver,
		ARRAY_SIZE(lxt97x_driver));
}

module_init(lxt_init);
module_exit(lxt_exit);

static struct mdio_device_id __maybe_unused lxt_tbl[] = {
	{ 0x78100000, 0xfffffff0 },
	{ 0x001378e0, 0xfffffff0 },
	{ 0x00137a10, 0xfffffff0 },
	{ }
};

MODULE_DEVICE_TABLE(mdio, lxt_tbl);