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
24 #define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
25 #define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
26 #define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
27 #define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
29 /* Vitesse Interrupt Mask Register */
30 #define MII_VSC8244_IMASK 0x19
31 #define MII_VSC8244_IMASK_IEN 0x8000
32 #define MII_VSC8244_IMASK_SPEED 0x4000
33 #define MII_VSC8244_IMASK_LINK 0x2000
34 #define MII_VSC8244_IMASK_DUPLEX 0x1000
35 #define MII_VSC8244_IMASK_MASK 0xf000
37 /* Vitesse Interrupt Status Register */
38 #define MII_VSC8244_ISTAT 0x1a
39 #define MII_VSC8244_ISTAT_STATUS 0x8000
40 #define MII_VSC8244_ISTAT_SPEED 0x4000
41 #define MII_VSC8244_ISTAT_LINK 0x2000
42 #define MII_VSC8244_ISTAT_DUPLEX 0x1000
44 /* Vitesse Auxiliary Control/Status Register */
45 #define MII_VSC8244_AUX_CONSTAT 0x1c
46 #define MII_VSC8244_AUXCONSTAT_INIT 0x0000
47 #define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
48 #define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
49 #define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
50 #define MII_VSC8244_AUXCONSTAT_100 0x0008
52 MODULE_DESCRIPTION("Vitesse PHY driver");
53 MODULE_AUTHOR("Kriston Carson");
54 MODULE_LICENSE("GPL");
56 static int vsc824x_config_init(struct phy_device *phydev)
61 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
62 MII_VSC8244_AUXCONSTAT_INIT);
66 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
71 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
72 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
74 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
75 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
76 MII_VSC8244_EXTCON1_RX_SKEW);
78 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
83 static int vsc824x_ack_interrupt(struct phy_device *phydev)
88 * Don't bother to ACK the interrupts if interrupts
89 * are disabled. The 824x cannot clear the interrupts
90 * if they are disabled.
92 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
93 err = phy_read(phydev, MII_VSC8244_ISTAT);
95 return (err < 0) ? err : 0;
98 static int vsc824x_config_intr(struct phy_device *phydev)
102 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
103 err = phy_write(phydev, MII_VSC8244_IMASK,
104 MII_VSC8244_IMASK_MASK);
107 * The Vitesse PHY cannot clear the interrupt
108 * once it has disabled them, so we clear them first
110 err = phy_read(phydev, MII_VSC8244_ISTAT);
115 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
122 static struct phy_driver vsc8244_driver = {
123 .phy_id = 0x000fc6c0,
124 .name = "Vitesse VSC8244",
125 .phy_id_mask = 0x000fffc0,
126 .features = PHY_GBIT_FEATURES,
127 .flags = PHY_HAS_INTERRUPT,
128 .config_init = &vsc824x_config_init,
129 .config_aneg = &genphy_config_aneg,
130 .read_status = &genphy_read_status,
131 .ack_interrupt = &vsc824x_ack_interrupt,
132 .config_intr = &vsc824x_config_intr,
133 .driver = { .owner = THIS_MODULE,},
136 static int __init vsc8244_init(void)
138 return phy_driver_register(&vsc8244_driver);
141 static void __exit vsc8244_exit(void)
143 phy_driver_unregister(&vsc8244_driver);
146 module_init(vsc8244_init);
147 module_exit(vsc8244_exit);