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/interrupt.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/skbuff.h>
26 #include <linux/spinlock.h>
27 #include <linux/mm.h>
28 #include <linux/module.h>
29 #include <linux/mii.h>
30 #include <linux/ethtool.h>
31 #include <linux/phy.h>
32
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <asm/uaccess.h>
36
37 #define MII_DM9161_SCR 0x10
38 #define MII_DM9161_SCR_INIT 0x0610
39 #define MII_DM9161_SCR_RMII 0x0100
40
41 /* DM9161 Interrupt Register */
42 #define MII_DM9161_INTR 0x15
43 #define MII_DM9161_INTR_PEND 0x8000
44 #define MII_DM9161_INTR_DPLX_MASK 0x0800
45 #define MII_DM9161_INTR_SPD_MASK 0x0400
46 #define MII_DM9161_INTR_LINK_MASK 0x0200
47 #define MII_DM9161_INTR_MASK 0x0100
48 #define MII_DM9161_INTR_DPLX_CHANGE 0x0010
49 #define MII_DM9161_INTR_SPD_CHANGE 0x0008
50 #define MII_DM9161_INTR_LINK_CHANGE 0x0004
51 #define MII_DM9161_INTR_INIT 0x0000
52 #define MII_DM9161_INTR_STOP \
53 (MII_DM9161_INTR_DPLX_MASK | MII_DM9161_INTR_SPD_MASK \
54 | MII_DM9161_INTR_LINK_MASK | MII_DM9161_INTR_MASK)
55
56 /* DM9161 10BT Configuration/Status */
57 #define MII_DM9161_10BTCSR 0x12
58 #define MII_DM9161_10BTCSR_INIT 0x7800
59
60 MODULE_DESCRIPTION("Davicom PHY driver");
61 MODULE_AUTHOR("Andy Fleming");
62 MODULE_LICENSE("GPL");
63
64
65 #define DM9161_DELAY 1
dm9161_config_intr(struct phy_device * phydev)66 static int dm9161_config_intr(struct phy_device *phydev)
67 {
68 int temp;
69
70 temp = phy_read(phydev, MII_DM9161_INTR);
71
72 if (temp < 0)
73 return temp;
74
75 if(PHY_INTERRUPT_ENABLED == phydev->interrupts )
76 temp &= ~(MII_DM9161_INTR_STOP);
77 else
78 temp |= MII_DM9161_INTR_STOP;
79
80 temp = phy_write(phydev, MII_DM9161_INTR, temp);
81
82 return temp;
83 }
84
dm9161_config_aneg(struct phy_device * phydev)85 static int dm9161_config_aneg(struct phy_device *phydev)
86 {
87 int err;
88
89 /* Isolate the PHY */
90 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
91
92 if (err < 0)
93 return err;
94
95 /* Configure the new settings */
96 err = genphy_config_aneg(phydev);
97
98 if (err < 0)
99 return err;
100
101 return 0;
102 }
103
dm9161_config_init(struct phy_device * phydev)104 static int dm9161_config_init(struct phy_device *phydev)
105 {
106 int err, temp;
107
108 /* Isolate the PHY */
109 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
110
111 if (err < 0)
112 return err;
113
114 switch (phydev->interface) {
115 case PHY_INTERFACE_MODE_MII:
116 temp = MII_DM9161_SCR_INIT;
117 break;
118 case PHY_INTERFACE_MODE_RMII:
119 temp = MII_DM9161_SCR_INIT | MII_DM9161_SCR_RMII;
120 break;
121 default:
122 return -EINVAL;
123 }
124
125 /* Do not bypass the scrambler/descrambler */
126 err = phy_write(phydev, MII_DM9161_SCR, temp);
127 if (err < 0)
128 return err;
129
130 /* Clear 10BTCSR to default */
131 err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
132
133 if (err < 0)
134 return err;
135
136 /* Reconnect the PHY, and enable Autonegotiation */
137 err = phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
138
139 if (err < 0)
140 return err;
141
142 return 0;
143 }
144
dm9161_ack_interrupt(struct phy_device * phydev)145 static int dm9161_ack_interrupt(struct phy_device *phydev)
146 {
147 int err = phy_read(phydev, MII_DM9161_INTR);
148
149 return (err < 0) ? err : 0;
150 }
151
152 static struct phy_driver dm9161e_driver = {
153 .phy_id = 0x0181b880,
154 .name = "Davicom DM9161E",
155 .phy_id_mask = 0x0ffffff0,
156 .features = PHY_BASIC_FEATURES,
157 .config_init = dm9161_config_init,
158 .config_aneg = dm9161_config_aneg,
159 .read_status = genphy_read_status,
160 .driver = { .owner = THIS_MODULE,},
161 };
162
163 static struct phy_driver dm9161a_driver = {
164 .phy_id = 0x0181b8a0,
165 .name = "Davicom DM9161A",
166 .phy_id_mask = 0x0ffffff0,
167 .features = PHY_BASIC_FEATURES,
168 .config_init = dm9161_config_init,
169 .config_aneg = dm9161_config_aneg,
170 .read_status = genphy_read_status,
171 .driver = { .owner = THIS_MODULE,},
172 };
173
174 static struct phy_driver dm9131_driver = {
175 .phy_id = 0x00181b80,
176 .name = "Davicom DM9131",
177 .phy_id_mask = 0x0ffffff0,
178 .features = PHY_BASIC_FEATURES,
179 .flags = PHY_HAS_INTERRUPT,
180 .config_aneg = genphy_config_aneg,
181 .read_status = genphy_read_status,
182 .ack_interrupt = dm9161_ack_interrupt,
183 .config_intr = dm9161_config_intr,
184 .driver = { .owner = THIS_MODULE,},
185 };
186
davicom_init(void)187 static int __init davicom_init(void)
188 {
189 int ret;
190
191 ret = phy_driver_register(&dm9161e_driver);
192 if (ret)
193 goto err1;
194
195 ret = phy_driver_register(&dm9161a_driver);
196 if (ret)
197 goto err2;
198
199 ret = phy_driver_register(&dm9131_driver);
200 if (ret)
201 goto err3;
202 return 0;
203
204 err3:
205 phy_driver_unregister(&dm9161a_driver);
206 err2:
207 phy_driver_unregister(&dm9161e_driver);
208 err1:
209 return ret;
210 }
211
davicom_exit(void)212 static void __exit davicom_exit(void)
213 {
214 phy_driver_unregister(&dm9161e_driver);
215 phy_driver_unregister(&dm9161a_driver);
216 phy_driver_unregister(&dm9131_driver);
217 }
218
219 module_init(davicom_init);
220 module_exit(davicom_exit);
221
222 static struct mdio_device_id __maybe_unused davicom_tbl[] = {
223 { 0x0181b880, 0x0ffffff0 },
224 { 0x0181b8a0, 0x0ffffff0 },
225 { 0x00181b80, 0x0ffffff0 },
226 { }
227 };
228
229 MODULE_DEVICE_TABLE(mdio, davicom_tbl);
230