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