2 * Driver for Vitesse PHYs
4 * Author: Kriston Carson
6 * Copyright (c) 2005, 2009 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 int vsc824x_add_skew(struct phy_device *phydev)
69 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
74 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
75 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
77 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
78 MII_VSC8244_EXTCON1_RX_SKEW);
80 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
84 EXPORT_SYMBOL(vsc824x_add_skew);
86 static int vsc824x_config_init(struct phy_device *phydev)
90 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
91 MII_VSC8244_AUXCONSTAT_INIT);
95 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
96 err = vsc824x_add_skew(phydev);
101 static int vsc824x_ack_interrupt(struct phy_device *phydev)
106 * Don't bother to ACK the interrupts if interrupts
107 * are disabled. The 824x cannot clear the interrupts
108 * if they are disabled.
110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
111 err = phy_read(phydev, MII_VSC8244_ISTAT);
113 return (err < 0) ? err : 0;
116 static int vsc82xx_config_intr(struct phy_device *phydev)
120 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
121 err = phy_write(phydev, MII_VSC8244_IMASK,
122 phydev->drv->phy_id == PHY_ID_VSC8244 ?
123 MII_VSC8244_IMASK_MASK :
124 MII_VSC8221_IMASK_MASK);
127 * The Vitesse PHY cannot clear the interrupt
128 * once it has disabled them, so we clear them first
130 err = phy_read(phydev, MII_VSC8244_ISTAT);
135 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
141 static int vsc8221_config_init(struct phy_device *phydev)
145 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
146 MII_VSC8221_AUXCONSTAT_INIT);
149 /* Perhaps we should set EXT_CON1 based on the interface?
150 Options are 802.3Z SerDes or SGMII */
154 static struct phy_driver vsc82xx_driver[] = {
156 .phy_id = PHY_ID_VSC8244,
157 .name = "Vitesse VSC8244",
158 .phy_id_mask = 0x000fffc0,
159 .features = PHY_GBIT_FEATURES,
160 .flags = PHY_HAS_INTERRUPT,
161 .config_init = &vsc824x_config_init,
162 .config_aneg = &genphy_config_aneg,
163 .read_status = &genphy_read_status,
164 .ack_interrupt = &vsc824x_ack_interrupt,
165 .config_intr = &vsc82xx_config_intr,
166 .driver = { .owner = THIS_MODULE,},
169 .phy_id = PHY_ID_VSC8221,
170 .phy_id_mask = 0x000ffff0,
171 .name = "Vitesse VSC8221",
172 .features = PHY_GBIT_FEATURES,
173 .flags = PHY_HAS_INTERRUPT,
174 .config_init = &vsc8221_config_init,
175 .config_aneg = &genphy_config_aneg,
176 .read_status = &genphy_read_status,
177 .ack_interrupt = &vsc824x_ack_interrupt,
178 .config_intr = &vsc82xx_config_intr,
179 .driver = { .owner = THIS_MODULE,},
182 static int __init vsc82xx_init(void)
184 return phy_drivers_register(vsc82xx_driver,
185 ARRAY_SIZE(vsc82xx_driver));
188 static void __exit vsc82xx_exit(void)
190 return phy_drivers_unregister(vsc82xx_driver,
191 ARRAY_SIZE(vsc82xx_driver));
194 module_init(vsc82xx_init);
195 module_exit(vsc82xx_exit);
197 static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
198 { PHY_ID_VSC8244, 0x000fffc0 },
199 { PHY_ID_VSC8221, 0x000ffff0 },
203 MODULE_DEVICE_TABLE(mdio, vitesse_tbl);