tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * drivers/net/phy/davicom.c
3 *
4 * Driver for Davicom PHYs
5 *
6 * Author: Andy Fleming
7 *
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 */
16#include <linux/config.h>
17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/string.h>
20#include <linux/errno.h>
21#include <linux/unistd.h>
22#include <linux/slab.h>
23#include <linux/interrupt.h>
24#include <linux/init.h>
25#include <linux/delay.h>
26#include <linux/netdevice.h>
27#include <linux/etherdevice.h>
28#include <linux/skbuff.h>
29#include <linux/spinlock.h>
30#include <linux/mm.h>
31#include <linux/module.h>
32#include <linux/mii.h>
33#include <linux/ethtool.h>
34#include <linux/phy.h>
35
36#include <asm/io.h>
37#include <asm/irq.h>
38#include <asm/uaccess.h>
39
40#define MII_DM9161_SCR 0x10
41#define MII_DM9161_SCR_INIT 0x0610
42
43/* DM9161 Interrupt Register */
44#define MII_DM9161_INTR 0x15
45#define MII_DM9161_INTR_PEND 0x8000
46#define MII_DM9161_INTR_DPLX_MASK 0x0800
47#define MII_DM9161_INTR_SPD_MASK 0x0400
48#define MII_DM9161_INTR_LINK_MASK 0x0200
49#define MII_DM9161_INTR_MASK 0x0100
50#define MII_DM9161_INTR_DPLX_CHANGE 0x0010
51#define MII_DM9161_INTR_SPD_CHANGE 0x0008
52#define MII_DM9161_INTR_LINK_CHANGE 0x0004
53#define MII_DM9161_INTR_INIT 0x0000
54#define MII_DM9161_INTR_STOP \
55(MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
56 | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
57
58/* DM9161 10BT Configuration/Status */
59#define MII_DM9161_10BTCSR 0x12
60#define MII_DM9161_10BTCSR_INIT 0x7800
61
62MODULE_DESCRIPTION("Davicom PHY driver");
63MODULE_AUTHOR("Andy Fleming");
64MODULE_LICENSE("GPL");
65
66
67#define DM9161_DELAY 1
68static int dm9161_config_intr(struct phy_device *phydev)
69{
70 int temp;
71
72 temp = phy_read(phydev, MII_DM9161_INTR);
73
74 if (temp < 0)
75 return temp;
76
77 if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
78 temp &= ~(MII_DM9161_INTR_STOP);
79 else
80 temp |= MII_DM9161_INTR_STOP;
81
82 temp = phy_write(phydev, MII_DM9161_INTR, temp);
83
84 return temp;
85}
86
87static int dm9161_config_aneg(struct phy_device *phydev)
88{
89 int err;
90
91 /* Isolate the PHY */
92 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
93
94 if (err < 0)
95 return err;
96
97 /* Configure the new settings */
98 err = genphy_config_aneg(phydev);
99
100 if (err < 0)
101 return err;
102
103 return 0;
104}
105
106static int dm9161_config_init(struct phy_device *phydev)
107{
108 int err;
109
110 /* Isolate the PHY */
111 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
112
113 if (err < 0)
114 return err;
115
116 /* Do not bypass the scrambler/descrambler */
117 err = phy_write(phydev, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
118
119 if (err < 0)
120 return err;
121
122 /* Clear 10BTCSR to default */
123 err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
124
125 if (err < 0)
126 return err;
127
128 /* Reconnect the PHY, and enable Autonegotiation */
129 err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
130
131 if (err < 0)
132 return err;
133
134 return 0;
135}
136
137static int dm9161_ack_interrupt(struct phy_device *phydev)
138{
139 int err = phy_read(phydev, MII_DM9161_INTR);
140
141 return (err < 0) ? err : 0;
142}
143
144static struct phy_driver dm9161_driver = {
145 .phy_id = 0x0181b880,
146 .name = "Davicom DM9161E",
147 .phy_id_mask = 0x0ffffff0,
148 .features = PHY_BASIC_FEATURES,
149 .config_init = dm9161_config_init,
150 .config_aneg = dm9161_config_aneg,
151 .read_status = genphy_read_status,
152 .driver = { .owner = THIS_MODULE,},
153};
154
155static struct phy_driver dm9131_driver = {
156 .phy_id = 0x00181b80,
157 .name = "Davicom DM9131",
158 .phy_id_mask = 0x0ffffff0,
159 .features = PHY_BASIC_FEATURES,
160 .flags = PHY_HAS_INTERRUPT,
161 .config_aneg = genphy_config_aneg,
162 .read_status = genphy_read_status,
163 .ack_interrupt = dm9161_ack_interrupt,
164 .config_intr = dm9161_config_intr,
165 .driver = { .owner = THIS_MODULE,},
166};
167
168static int __init davicom_init(void)
169{
170 int ret;
171
172 ret = phy_driver_register(&dm9161_driver);
173 if (ret)
174 goto err1;
175
176 ret = phy_driver_register(&dm9131_driver);
177 if (ret)
178 goto err2;
179 return 0;
180
181 err2:
182 phy_driver_unregister(&dm9161_driver);
183 err1:
184 return ret;
185}
186
187static void __exit davicom_exit(void)
188{
189 phy_driver_unregister(&dm9161_driver);
190 phy_driver_unregister(&dm9131_driver);
191}
192
193module_init(davicom_init);
194module_exit(davicom_exit);