2 * Driver for Vitesse PHYs
4 * Author: Kriston Carson
6 * Copyright (c) 2005 Freescale Semiconductor, Inc.
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.
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>
21 /* Vitesse Extended Control Register 1 */
22 #define MII_VSC8244_EXT_CON1 0x17
23 #define MII_VSC8244_EXTCON1_INIT 0x0000
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
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
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
48 MODULE_DESCRIPTION("Vitesse PHY driver");
49 MODULE_AUTHOR("Kriston Carson");
50 MODULE_LICENSE("GPL");
52 static int vsc824x_config_init(struct phy_device *phydev)
56 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
57 MII_VSC8244_AUXCONSTAT_INIT);
61 err = phy_write(phydev, MII_VSC8244_EXT_CON1,
62 MII_VSC8244_EXTCON1_INIT);
66 static int vsc824x_ack_interrupt(struct phy_device *phydev)
71 * Don't bother to ACK the interrupts if interrupts
72 * are disabled. The 824x cannot clear the interrupts
73 * if they are disabled.
75 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
76 err = phy_read(phydev, MII_VSC8244_ISTAT);
78 return (err < 0) ? err : 0;
81 static int vsc824x_config_intr(struct phy_device *phydev)
85 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
86 err = phy_write(phydev, MII_VSC8244_IMASK,
87 MII_VSC8244_IMASK_MASK);
90 * The Vitesse PHY cannot clear the interrupt
91 * once it has disabled them, so we clear them first
93 err = phy_read(phydev, MII_VSC8244_ISTAT);
98 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
105 static struct phy_driver vsc8244_driver = {
106 .phy_id = 0x000fc6c0,
107 .name = "Vitesse VSC8244",
108 .phy_id_mask = 0x000fffc0,
109 .features = PHY_GBIT_FEATURES,
110 .flags = PHY_HAS_INTERRUPT,
111 .config_init = &vsc824x_config_init,
112 .config_aneg = &genphy_config_aneg,
113 .read_status = &genphy_read_status,
114 .ack_interrupt = &vsc824x_ack_interrupt,
115 .config_intr = &vsc824x_config_intr,
116 .driver = { .owner = THIS_MODULE,},
119 static int __init vsc8244_init(void)
121 return phy_driver_register(&vsc8244_driver);
124 static void __exit vsc8244_exit(void)
126 phy_driver_unregister(&vsc8244_driver);
129 module_init(vsc8244_init);
130 module_exit(vsc8244_exit);