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Jon Loeligeref82a302006-06-17 17:52:55 -05001/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
6 * Copyright (c) 2005 Freescale Semiconductor, Inc.
7 *
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.
12 *
13 */
14
Jon Loeligeref82a302006-06-17 17:52:55 -050015#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mii.h>
18#include <linux/ethtool.h>
19#include <linux/phy.h>
20
21/* Vitesse Extended Control Register 1 */
22#define MII_VSC8244_EXT_CON1 0x17
23#define MII_VSC8244_EXTCON1_INIT 0x0000
Andy Flemingaf2d9402007-07-11 11:42:35 -050024#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
Jon Loeligeref82a302006-06-17 17:52:55 -050028
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
36
Trent Piepho11c6dd22008-11-25 01:00:47 -080037#define MII_VSC8221_IMASK_MASK 0xa000
38
Jon Loeligeref82a302006-06-17 17:52:55 -050039/* 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
45
46/* Vitesse Auxiliary Control/Status Register */
47#define MII_VSC8244_AUX_CONSTAT 0x1c
Andy Flemingaf2d9402007-07-11 11:42:35 -050048#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
Jon Loeligeref82a302006-06-17 17:52:55 -050049#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
53
Trent Piepho11c6dd22008-11-25 01:00:47 -080054#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
55#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
56
57#define PHY_ID_VSC8244 0x000fc6c0
58#define PHY_ID_VSC8221 0x000fc550
59
Jon Loeligeref82a302006-06-17 17:52:55 -050060MODULE_DESCRIPTION("Vitesse PHY driver");
61MODULE_AUTHOR("Kriston Carson");
62MODULE_LICENSE("GPL");
63
64static int vsc824x_config_init(struct phy_device *phydev)
65{
Andy Flemingaf2d9402007-07-11 11:42:35 -050066 int extcon;
Jon Loeligeref82a302006-06-17 17:52:55 -050067 int err;
68
69 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
70 MII_VSC8244_AUXCONSTAT_INIT);
71 if (err < 0)
72 return err;
73
Andy Flemingaf2d9402007-07-11 11:42:35 -050074 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
75
76 if (extcon < 0)
77 return err;
78
79 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
80 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
81
82 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
83 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
84 MII_VSC8244_EXTCON1_RX_SKEW);
85
86 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
87
Jon Loeligeref82a302006-06-17 17:52:55 -050088 return err;
89}
90
91static int vsc824x_ack_interrupt(struct phy_device *phydev)
92{
Andy Fleming1d5e83a2007-07-10 16:42:04 -050093 int err = 0;
94
95 /*
96 * Don't bother to ACK the interrupts if interrupts
97 * are disabled. The 824x cannot clear the interrupts
98 * if they are disabled.
99 */
100 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
101 err = phy_read(phydev, MII_VSC8244_ISTAT);
Jon Loeligeref82a302006-06-17 17:52:55 -0500102
103 return (err < 0) ? err : 0;
104}
105
Trent Piepho11c6dd22008-11-25 01:00:47 -0800106static int vsc82xx_config_intr(struct phy_device *phydev)
Jon Loeligeref82a302006-06-17 17:52:55 -0500107{
108 int err;
109
110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
111 err = phy_write(phydev, MII_VSC8244_IMASK,
Trent Piepho11c6dd22008-11-25 01:00:47 -0800112 phydev->drv->phy_id == PHY_ID_VSC8244 ?
113 MII_VSC8244_IMASK_MASK :
114 MII_VSC8221_IMASK_MASK);
Andy Fleming1d5e83a2007-07-10 16:42:04 -0500115 else {
116 /*
117 * The Vitesse PHY cannot clear the interrupt
118 * once it has disabled them, so we clear them first
119 */
120 err = phy_read(phydev, MII_VSC8244_ISTAT);
121
Andy Fleming52cb1c22007-07-18 01:06:28 -0500122 if (err < 0)
Andy Fleming1d5e83a2007-07-10 16:42:04 -0500123 return err;
124
Jon Loeligeref82a302006-06-17 17:52:55 -0500125 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
Andy Fleming1d5e83a2007-07-10 16:42:04 -0500126 }
127
Jon Loeligeref82a302006-06-17 17:52:55 -0500128 return err;
129}
130
131/* Vitesse 824x */
132static struct phy_driver vsc8244_driver = {
Trent Piepho11c6dd22008-11-25 01:00:47 -0800133 .phy_id = PHY_ID_VSC8244,
Jon Loeligeref82a302006-06-17 17:52:55 -0500134 .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,
Trent Piepho11c6dd22008-11-25 01:00:47 -0800142 .config_intr = &vsc82xx_config_intr,
Jon Loeligeref82a302006-06-17 17:52:55 -0500143 .driver = { .owner = THIS_MODULE,},
144};
145
Trent Piepho11c6dd22008-11-25 01:00:47 -0800146static int vsc8221_config_init(struct phy_device *phydev)
Jon Loeligeref82a302006-06-17 17:52:55 -0500147{
Trent Piepho11c6dd22008-11-25 01:00:47 -0800148 int err;
149
150 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
151 MII_VSC8221_AUXCONSTAT_INIT);
152 return err;
153
154 /* Perhaps we should set EXT_CON1 based on the interface?
155 Options are 802.3Z SerDes or SGMII */
Jon Loeligeref82a302006-06-17 17:52:55 -0500156}
157
Trent Piepho11c6dd22008-11-25 01:00:47 -0800158/* Vitesse 8221 */
159static 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,},
171};
172
173static int __init vsc82xx_init(void)
174{
175 int err;
176
177 err = phy_driver_register(&vsc8244_driver);
178 if (err < 0)
179 return err;
180 err = phy_driver_register(&vsc8221_driver);
181 if (err < 0)
182 phy_driver_unregister(&vsc8244_driver);
183 return err;
184}
185
186static void __exit vsc82xx_exit(void)
Jon Loeligeref82a302006-06-17 17:52:55 -0500187{
188 phy_driver_unregister(&vsc8244_driver);
Trent Piepho11c6dd22008-11-25 01:00:47 -0800189 phy_driver_unregister(&vsc8221_driver);
Jon Loeligeref82a302006-06-17 17:52:55 -0500190}
191
Trent Piepho11c6dd22008-11-25 01:00:47 -0800192module_init(vsc82xx_init);
193module_exit(vsc82xx_exit);
David Woodhouse4e4f10f2010-04-02 01:05:56 +0000194
Uwe Kleine-Königcf93c942010-10-03 23:43:32 +0000195static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
David Woodhouse4e4f10f2010-04-02 01:05:56 +0000196 { PHY_ID_VSC8244, 0x000fffc0 },
197 { PHY_ID_VSC8221, 0x000ffff0 },
198 { }
199};
200
201MODULE_DEVICE_TABLE(mdio, vitesse_tbl);