1/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
6 * Copyright (c) 2005 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute  it and/or modify it
9 * under  the terms of  the GNU General  Public License as published by the
10 * Free Software Foundation;  either version 2 of the  License, or (at your
11 * option) any later version.
12 *
13 */
14
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mii.h>
18#include <linux/ethtool.h>
19#include <linux/phy.h>
20
21/* Vitesse Extended Control Register 1 */
22#define MII_VSC8244_EXT_CON1           0x17
23#define MII_VSC8244_EXTCON1_INIT       0x0000
24
25/* Vitesse Interrupt Mask Register */
26#define MII_VSC8244_IMASK		0x19
27#define MII_VSC8244_IMASK_IEN		0x8000
28#define MII_VSC8244_IMASK_SPEED		0x4000
29#define MII_VSC8244_IMASK_LINK		0x2000
30#define MII_VSC8244_IMASK_DUPLEX	0x1000
31#define MII_VSC8244_IMASK_MASK		0xf000
32
33/* Vitesse Interrupt Status Register */
34#define MII_VSC8244_ISTAT		0x1a
35#define MII_VSC8244_ISTAT_STATUS	0x8000
36#define MII_VSC8244_ISTAT_SPEED		0x4000
37#define MII_VSC8244_ISTAT_LINK		0x2000
38#define MII_VSC8244_ISTAT_DUPLEX	0x1000
39
40/* Vitesse Auxiliary Control/Status Register */
41#define MII_VSC8244_AUX_CONSTAT        	0x1c
42#define MII_VSC8244_AUXCONSTAT_INIT    	0x0004
43#define MII_VSC8244_AUXCONSTAT_DUPLEX  	0x0020
44#define MII_VSC8244_AUXCONSTAT_SPEED   	0x0018
45#define MII_VSC8244_AUXCONSTAT_GBIT    	0x0010
46#define MII_VSC8244_AUXCONSTAT_100     	0x0008
47
48MODULE_DESCRIPTION("Vitesse PHY driver");
49MODULE_AUTHOR("Kriston Carson");
50MODULE_LICENSE("GPL");
51
52static int vsc824x_config_init(struct phy_device *phydev)
53{
54	int err;
55
56	err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
57			MII_VSC8244_AUXCONSTAT_INIT);
58	if (err < 0)
59		return err;
60
61	err = phy_write(phydev, MII_VSC8244_EXT_CON1,
62			MII_VSC8244_EXTCON1_INIT);
63	return err;
64}
65
66static int vsc824x_ack_interrupt(struct phy_device *phydev)
67{
68	int err = phy_read(phydev, MII_VSC8244_ISTAT);
69
70	return (err < 0) ? err : 0;
71}
72
73static int vsc824x_config_intr(struct phy_device *phydev)
74{
75	int err;
76
77	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
78		err = phy_write(phydev, MII_VSC8244_IMASK,
79				MII_VSC8244_IMASK_MASK);
80	else
81		err = phy_write(phydev, MII_VSC8244_IMASK, 0);
82	return err;
83}
84
85/* Vitesse 824x */
86static struct phy_driver vsc8244_driver = {
87	.phy_id		= 0x000fc6c0,
88	.name		= "Vitesse VSC8244",
89	.phy_id_mask	= 0x000fffc0,
90	.features	= PHY_GBIT_FEATURES,
91	.flags		= PHY_HAS_INTERRUPT,
92	.config_init	= &vsc824x_config_init,
93	.config_aneg	= &genphy_config_aneg,
94	.read_status	= &genphy_read_status,
95	.ack_interrupt	= &vsc824x_ack_interrupt,
96	.config_intr	= &vsc824x_config_intr,
97	.driver 	= { .owner = THIS_MODULE,},
98};
99
100static int __init vsc8244_init(void)
101{
102	return phy_driver_register(&vsc8244_driver);
103}
104
105static void __exit vsc8244_exit(void)
106{
107	phy_driver_unregister(&vsc8244_driver);
108}
109
110module_init(vsc8244_init);
111module_exit(vsc8244_exit);
112