1/*
2 * drivers/net/phy/realtek.c
3 *
4 * Driver for Realtek PHYs
5 *
6 * Author: Johnson Leung <r58129@freescale.com>
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/phy.h>
17#include <linux/module.h>
18
19#define RTL821x_PHYSR		0x11
20#define RTL821x_PHYSR_DUPLEX	0x2000
21#define RTL821x_PHYSR_SPEED	0xc000
22#define RTL821x_INER		0x12
23#define RTL821x_INER_INIT	0x6400
24#define RTL821x_INSR		0x13
25
26MODULE_DESCRIPTION("Realtek PHY driver");
27MODULE_AUTHOR("Johnson Leung");
28MODULE_LICENSE("GPL");
29
30static int rtl821x_ack_interrupt(struct phy_device *phydev)
31{
32	int err;
33
34	err = phy_read(phydev, RTL821x_INSR);
35
36	return (err < 0) ? err : 0;
37}
38
39static int rtl821x_config_intr(struct phy_device *phydev)
40{
41	int err;
42
43	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
44		err = phy_write(phydev, RTL821x_INER,
45				RTL821x_INER_INIT);
46	else
47		err = phy_write(phydev, RTL821x_INER, 0);
48
49	return err;
50}
51
52/* RTL8211B */
53static struct phy_driver rtl821x_driver = {
54	.phy_id		= 0x001cc912,
55	.name		= "RTL821x Gigabit Ethernet",
56	.phy_id_mask	= 0x001fffff,
57	.features	= PHY_GBIT_FEATURES,
58	.flags		= PHY_HAS_INTERRUPT,
59	.config_aneg	= &genphy_config_aneg,
60	.read_status	= &genphy_read_status,
61	.ack_interrupt	= &rtl821x_ack_interrupt,
62	.config_intr	= &rtl821x_config_intr,
63	.driver		= { .owner = THIS_MODULE,},
64};
65
66static int __init realtek_init(void)
67{
68	int ret;
69
70	ret = phy_driver_register(&rtl821x_driver);
71
72	return ret;
73}
74
75static void __exit realtek_exit(void)
76{
77	phy_driver_unregister(&rtl821x_driver);
78}
79
80module_init(realtek_init);
81module_exit(realtek_exit);
82
83static struct mdio_device_id __maybe_unused realtek_tbl[] = {
84	{ 0x001cc912, 0x001fffff },
85	{ }
86};
87
88MODULE_DEVICE_TABLE(mdio, realtek_tbl);
89