xref: /openbmc/linux/drivers/net/phy/realtek.c (revision e23feb16)
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 
26 #define	RTL8211E_INER_LINK_STATUS	0x400
27 
28 MODULE_DESCRIPTION("Realtek PHY driver");
29 MODULE_AUTHOR("Johnson Leung");
30 MODULE_LICENSE("GPL");
31 
32 static int rtl821x_ack_interrupt(struct phy_device *phydev)
33 {
34 	int err;
35 
36 	err = phy_read(phydev, RTL821x_INSR);
37 
38 	return (err < 0) ? err : 0;
39 }
40 
41 static int rtl8211b_config_intr(struct phy_device *phydev)
42 {
43 	int err;
44 
45 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
46 		err = phy_write(phydev, RTL821x_INER,
47 				RTL821x_INER_INIT);
48 	else
49 		err = phy_write(phydev, RTL821x_INER, 0);
50 
51 	return err;
52 }
53 
54 static int rtl8211e_config_intr(struct phy_device *phydev)
55 {
56 	int err;
57 
58 	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
59 		err = phy_write(phydev, RTL821x_INER,
60 				RTL8211E_INER_LINK_STATUS);
61 	else
62 		err = phy_write(phydev, RTL821x_INER, 0);
63 
64 	return err;
65 }
66 
67 /* RTL8211B */
68 static struct phy_driver rtl8211b_driver = {
69 	.phy_id		= 0x001cc912,
70 	.name		= "RTL8211B Gigabit Ethernet",
71 	.phy_id_mask	= 0x001fffff,
72 	.features	= PHY_GBIT_FEATURES,
73 	.flags		= PHY_HAS_INTERRUPT,
74 	.config_aneg	= &genphy_config_aneg,
75 	.read_status	= &genphy_read_status,
76 	.ack_interrupt	= &rtl821x_ack_interrupt,
77 	.config_intr	= &rtl8211b_config_intr,
78 	.driver		= { .owner = THIS_MODULE,},
79 };
80 
81 /* RTL8211E */
82 static struct phy_driver rtl8211e_driver = {
83 	.phy_id		= 0x001cc915,
84 	.name		= "RTL8211E Gigabit Ethernet",
85 	.phy_id_mask	= 0x001fffff,
86 	.features	= PHY_GBIT_FEATURES,
87 	.flags		= PHY_HAS_INTERRUPT,
88 	.config_aneg	= &genphy_config_aneg,
89 	.read_status	= &genphy_read_status,
90 	.ack_interrupt	= &rtl821x_ack_interrupt,
91 	.config_intr	= &rtl8211e_config_intr,
92 	.suspend	= genphy_suspend,
93 	.resume		= genphy_resume,
94 	.driver		= { .owner = THIS_MODULE,},
95 };
96 
97 static int __init realtek_init(void)
98 {
99 	int ret;
100 
101 	ret = phy_driver_register(&rtl8211b_driver);
102 	if (ret < 0)
103 		return -ENODEV;
104 	return phy_driver_register(&rtl8211e_driver);
105 }
106 
107 static void __exit realtek_exit(void)
108 {
109 	phy_driver_unregister(&rtl8211b_driver);
110 	phy_driver_unregister(&rtl8211e_driver);
111 }
112 
113 module_init(realtek_init);
114 module_exit(realtek_exit);
115 
116 static struct mdio_device_id __maybe_unused realtek_tbl[] = {
117 	{ 0x001cc912, 0x001fffff },
118 	{ 0x001cc915, 0x001fffff },
119 	{ }
120 };
121 
122 MODULE_DEVICE_TABLE(mdio, realtek_tbl);
123