xref: /linux/drivers/net/phy/davicom.c (revision 26b0d14106954ae46d2f4f7eec3481828a210f7d)
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
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 
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 
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 	return phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
138 }
139 
140 static int dm9161_ack_interrupt(struct phy_device *phydev)
141 {
142 	int err = phy_read(phydev, MII_DM9161_INTR);
143 
144 	return (err < 0) ? err : 0;
145 }
146 
147 static struct phy_driver dm9161e_driver = {
148 	.phy_id		= 0x0181b880,
149 	.name		= "Davicom DM9161E",
150 	.phy_id_mask	= 0x0ffffff0,
151 	.features	= PHY_BASIC_FEATURES,
152 	.config_init	= dm9161_config_init,
153 	.config_aneg	= dm9161_config_aneg,
154 	.read_status	= genphy_read_status,
155 	.driver		= { .owner = THIS_MODULE,},
156 };
157 
158 static struct phy_driver dm9161a_driver = {
159 	.phy_id		= 0x0181b8a0,
160 	.name		= "Davicom DM9161A",
161 	.phy_id_mask	= 0x0ffffff0,
162 	.features	= PHY_BASIC_FEATURES,
163 	.config_init	= dm9161_config_init,
164 	.config_aneg	= dm9161_config_aneg,
165 	.read_status	= genphy_read_status,
166 	.driver		= { .owner = THIS_MODULE,},
167 };
168 
169 static struct phy_driver dm9131_driver = {
170 	.phy_id		= 0x00181b80,
171 	.name		= "Davicom DM9131",
172 	.phy_id_mask	= 0x0ffffff0,
173 	.features	= PHY_BASIC_FEATURES,
174 	.flags		= PHY_HAS_INTERRUPT,
175 	.config_aneg	= genphy_config_aneg,
176 	.read_status	= genphy_read_status,
177 	.ack_interrupt	= dm9161_ack_interrupt,
178 	.config_intr	= dm9161_config_intr,
179 	.driver		= { .owner = THIS_MODULE,},
180 };
181 
182 static int __init davicom_init(void)
183 {
184 	int ret;
185 
186 	ret = phy_driver_register(&dm9161e_driver);
187 	if (ret)
188 		goto err1;
189 
190 	ret = phy_driver_register(&dm9161a_driver);
191 	if (ret)
192 		goto err2;
193 
194 	ret = phy_driver_register(&dm9131_driver);
195 	if (ret)
196 		goto err3;
197 	return 0;
198 
199  err3:
200 	phy_driver_unregister(&dm9161a_driver);
201  err2:
202 	phy_driver_unregister(&dm9161e_driver);
203  err1:
204 	return ret;
205 }
206 
207 static void __exit davicom_exit(void)
208 {
209 	phy_driver_unregister(&dm9161e_driver);
210 	phy_driver_unregister(&dm9161a_driver);
211 	phy_driver_unregister(&dm9131_driver);
212 }
213 
214 module_init(davicom_init);
215 module_exit(davicom_exit);
216 
217 static struct mdio_device_id __maybe_unused davicom_tbl[] = {
218 	{ 0x0181b880, 0x0ffffff0 },
219 	{ 0x0181b8a0, 0x0ffffff0 },
220 	{ 0x00181b80, 0x0ffffff0 },
221 	{ }
222 };
223 
224 MODULE_DEVICE_TABLE(mdio, davicom_tbl);
225