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/string.h>
18#include <linux/errno.h>
19#include <linux/unistd.h>
20#include <linux/slab.h>
21#include <linux/interrupt.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/skbuff.h>
27#include <linux/spinlock.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/phy.h>
33
34#include <asm/io.h>
35#include <asm/irq.h>
36#include <asm/uaccess.h>
37
38#define MII_DM9161_SCR 0x10
39#define MII_DM9161_SCR_INIT 0x0610
40#define MII_DM9161_SCR_RMII 0x0100
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, temp;
108
109 /* Isolate the PHY */
110 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
111
112 if (err < 0)
113 return err;
114
115 switch (phydev->interface) {
116 case PHY_INTERFACE_MODE_MII:
117 temp = MII_DM9161_SCR_INIT;
118 break;
119 case PHY_INTERFACE_MODE_RMII:
120 temp = MII_DM9161_SCR_INIT | MII_DM9161_SCR_RMII;
121 break;
122 default:
123 return -EINVAL;
124 }
125
126 /* Do not bypass the scrambler/descrambler */
127 err = phy_write(phydev, MII_DM9161_SCR, temp);
128 if (err < 0)
129 return err;
130
131 /* Clear 10BTCSR to default */
132 err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
133
134 if (err < 0)
135 return err;
136
137 /* Reconnect the PHY, and enable Autonegotiation */
138 err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
139
140 if (err < 0)
141 return err;
142
143 return 0;
144}
145
146static int dm9161_ack_interrupt(struct phy_device *phydev)
147{
148 int err = phy_read(phydev, MII_DM9161_INTR);
149
150 return (err < 0) ? err : 0;
151}
152
153static struct phy_driver dm9161e_driver = {
154 .phy_id = 0x0181b880,
155 .name = "Davicom DM9161E",
156 .phy_id_mask = 0x0ffffff0,
157 .features = PHY_BASIC_FEATURES,
158 .config_init = dm9161_config_init,
159 .config_aneg = dm9161_config_aneg,
160 .read_status = genphy_read_status,
161 .driver = { .owner = THIS_MODULE,},
162};
163
164static struct phy_driver dm9161a_driver = {
165 .phy_id = 0x0181b8a0,
166 .name = "Davicom DM9161A",
167 .phy_id_mask = 0x0ffffff0,
168 .features = PHY_BASIC_FEATURES,
169 .config_init = dm9161_config_init,
170 .config_aneg = dm9161_config_aneg,
171 .read_status = genphy_read_status,
172 .driver = { .owner = THIS_MODULE,},
173};
174
175static struct phy_driver dm9131_driver = {
176 .phy_id = 0x00181b80,
177 .name = "Davicom DM9131",
178 .phy_id_mask = 0x0ffffff0,
179 .features = PHY_BASIC_FEATURES,
180 .flags = PHY_HAS_INTERRUPT,
181 .config_aneg = genphy_config_aneg,
182 .read_status = genphy_read_status,
183 .ack_interrupt = dm9161_ack_interrupt,
184 .config_intr = dm9161_config_intr,
185 .driver = { .owner = THIS_MODULE,},
186};
187
188static int __init davicom_init(void)
189{
190 int ret;
191
192 ret = phy_driver_register(&dm9161e_driver);
193 if (ret)
194 goto err1;
195
196 ret = phy_driver_register(&dm9161a_driver);
197 if (ret)
198 goto err2;
199
200 ret = phy_driver_register(&dm9131_driver);
201 if (ret)
202 goto err3;
203 return 0;
204
205 err3:
206 phy_driver_unregister(&dm9161a_driver);
207 err2:
208 phy_driver_unregister(&dm9161e_driver);
209 err1:
210 return ret;
211}
212
213static void __exit davicom_exit(void)
214{
215 phy_driver_unregister(&dm9161e_driver);
216 phy_driver_unregister(&dm9161a_driver);
217 phy_driver_unregister(&dm9131_driver);
218}
219
220module_init(davicom_init);
221module_exit(davicom_exit);