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 #define MII_VSC8221_IMASK_MASK 0xa000
39 /* Vitesse Interrupt Status Register */
40 #define MII_VSC8244_ISTAT 0x1a
41 #define MII_VSC8244_ISTAT_STATUS 0x8000
42 #define MII_VSC8244_ISTAT_SPEED 0x4000
43 #define MII_VSC8244_ISTAT_LINK 0x2000
44 #define MII_VSC8244_ISTAT_DUPLEX 0x1000
46 /* Vitesse Auxiliary Control/Status Register */
47 #define MII_VSC8244_AUX_CONSTAT 0x1c
48 #define MII_VSC8244_AUXCONSTAT_INIT 0x0000
49 #define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
50 #define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
51 #define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
52 #define MII_VSC8244_AUXCONSTAT_100 0x0008
54 #define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
55 #define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
57 #define PHY_ID_VSC8244 0x000fc6c0
58 #define PHY_ID_VSC8221 0x000fc550
60 MODULE_DESCRIPTION("Vitesse PHY driver");
61 MODULE_AUTHOR("Kriston Carson");
62 MODULE_LICENSE("GPL");
64 static int vsc824x_config_init(struct phy_device *phydev)
69 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
70 MII_VSC8244_AUXCONSTAT_INIT);
74 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
79 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
80 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
82 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
83 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
84 MII_VSC8244_EXTCON1_RX_SKEW);
86 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
91 static int vsc824x_ack_interrupt(struct phy_device *phydev)
96 * Don't bother to ACK the interrupts if interrupts
97 * are disabled. The 824x cannot clear the interrupts
98 * if they are disabled.
100 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
101 err = phy_read(phydev, MII_VSC8244_ISTAT);
103 return (err < 0) ? err : 0;
106 static int vsc82xx_config_intr(struct phy_device *phydev)
110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
111 err = phy_write(phydev, MII_VSC8244_IMASK,
112 phydev->drv->phy_id == PHY_ID_VSC8244 ?
113 MII_VSC8244_IMASK_MASK :
114 MII_VSC8221_IMASK_MASK);
117 * The Vitesse PHY cannot clear the interrupt
118 * once it has disabled them, so we clear them first
120 err = phy_read(phydev, MII_VSC8244_ISTAT);
125 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
132 static struct phy_driver vsc8244_driver = {
133 .phy_id = PHY_ID_VSC8244,
134 .name = "Vitesse VSC8244",
135 .phy_id_mask = 0x000fffc0,
136 .features = PHY_GBIT_FEATURES,
137 .flags = PHY_HAS_INTERRUPT,
138 .config_init = &vsc824x_config_init,
139 .config_aneg = &genphy_config_aneg,
140 .read_status = &genphy_read_status,
141 .ack_interrupt = &vsc824x_ack_interrupt,
142 .config_intr = &vsc82xx_config_intr,
143 .driver = { .owner = THIS_MODULE,},
146 static int vsc8221_config_init(struct phy_device *phydev)
150 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
151 MII_VSC8221_AUXCONSTAT_INIT);
154 /* Perhaps we should set EXT_CON1 based on the interface?
155 Options are 802.3Z SerDes or SGMII */
159 static struct phy_driver vsc8221_driver = {
160 .phy_id = PHY_ID_VSC8221,
161 .phy_id_mask = 0x000ffff0,
162 .name = "Vitesse VSC8221",
163 .features = PHY_GBIT_FEATURES,
164 .flags = PHY_HAS_INTERRUPT,
165 .config_init = &vsc8221_config_init,
166 .config_aneg = &genphy_config_aneg,
167 .read_status = &genphy_read_status,
168 .ack_interrupt = &vsc824x_ack_interrupt,
169 .config_intr = &vsc82xx_config_intr,
170 .driver = { .owner = THIS_MODULE,},
173 static int __init vsc82xx_init(void)
177 err = phy_driver_register(&vsc8244_driver);
180 err = phy_driver_register(&vsc8221_driver);
182 phy_driver_unregister(&vsc8244_driver);
186 static void __exit vsc82xx_exit(void)
188 phy_driver_unregister(&vsc8244_driver);
189 phy_driver_unregister(&vsc8221_driver);
192 module_init(vsc82xx_init);
193 module_exit(vsc82xx_exit);