tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Driver for Vitesse PHYs
3 *
4 * Author: Kriston Carson
5 *
6 * Copyright (c) 2005, 2009 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
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>
20
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
28
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
37#define MII_VSC8221_IMASK_MASK 0xa000
38
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
45
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
53
54#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
60MODULE_DESCRIPTION("Vitesse PHY driver");
61MODULE_AUTHOR("Kriston Carson");
62MODULE_LICENSE("GPL");
63
64int vsc824x_add_skew(struct phy_device *phydev)
65{
66 int err;
67 int extcon;
68
69 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
70
71 if (extcon < 0)
72 return extcon;
73
74 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
75 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
76
77 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
78 MII_VSC8244_EXTCON1_RX_SKEW);
79
80 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
81
82 return err;
83}
84EXPORT_SYMBOL(vsc824x_add_skew);
85
86static int vsc824x_config_init(struct phy_device *phydev)
87{
88 int err;
89
90 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
91 MII_VSC8244_AUXCONSTAT_INIT);
92 if (err < 0)
93 return err;
94
95 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
96 err = vsc824x_add_skew(phydev);
97
98 return err;
99}
100
101static int vsc824x_ack_interrupt(struct phy_device *phydev)
102{
103 int err = 0;
104
105 /*
106 * Don't bother to ACK the interrupts if interrupts
107 * are disabled. The 824x cannot clear the interrupts
108 * if they are disabled.
109 */
110 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
111 err = phy_read(phydev, MII_VSC8244_ISTAT);
112
113 return (err < 0) ? err : 0;
114}
115
116static int vsc82xx_config_intr(struct phy_device *phydev)
117{
118 int err;
119
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);
125 else {
126 /*
127 * The Vitesse PHY cannot clear the interrupt
128 * once it has disabled them, so we clear them first
129 */
130 err = phy_read(phydev, MII_VSC8244_ISTAT);
131
132 if (err < 0)
133 return err;
134
135 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
136 }
137
138 return err;
139}
140
141/* Vitesse 824x */
142static struct phy_driver vsc8244_driver = {
143 .phy_id = PHY_ID_VSC8244,
144 .name = "Vitesse VSC8244",
145 .phy_id_mask = 0x000fffc0,
146 .features = PHY_GBIT_FEATURES,
147 .flags = PHY_HAS_INTERRUPT,
148 .config_init = &vsc824x_config_init,
149 .config_aneg = &genphy_config_aneg,
150 .read_status = &genphy_read_status,
151 .ack_interrupt = &vsc824x_ack_interrupt,
152 .config_intr = &vsc82xx_config_intr,
153 .driver = { .owner = THIS_MODULE,},
154};
155
156static int vsc8221_config_init(struct phy_device *phydev)
157{
158 int err;
159
160 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
161 MII_VSC8221_AUXCONSTAT_INIT);
162 return err;
163
164 /* Perhaps we should set EXT_CON1 based on the interface?
165 Options are 802.3Z SerDes or SGMII */
166}
167
168/* Vitesse 8221 */
169static struct phy_driver vsc8221_driver = {
170 .phy_id = PHY_ID_VSC8221,
171 .phy_id_mask = 0x000ffff0,
172 .name = "Vitesse VSC8221",
173 .features = PHY_GBIT_FEATURES,
174 .flags = PHY_HAS_INTERRUPT,
175 .config_init = &vsc8221_config_init,
176 .config_aneg = &genphy_config_aneg,
177 .read_status = &genphy_read_status,
178 .ack_interrupt = &vsc824x_ack_interrupt,
179 .config_intr = &vsc82xx_config_intr,
180 .driver = { .owner = THIS_MODULE,},
181};
182
183static int __init vsc82xx_init(void)
184{
185 int err;
186
187 err = phy_driver_register(&vsc8244_driver);
188 if (err < 0)
189 return err;
190 err = phy_driver_register(&vsc8221_driver);
191 if (err < 0)
192 phy_driver_unregister(&vsc8244_driver);
193 return err;
194}
195
196static void __exit vsc82xx_exit(void)
197{
198 phy_driver_unregister(&vsc8244_driver);
199 phy_driver_unregister(&vsc8221_driver);
200}
201
202module_init(vsc82xx_init);
203module_exit(vsc82xx_exit);
204
205static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
206 { PHY_ID_VSC8244, 0x000fffc0 },
207 { PHY_ID_VSC8221, 0x000ffff0 },
208 { }
209};
210
211MODULE_DEVICE_TABLE(mdio, vitesse_tbl);