Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / phy / davicom.c
blob5ee99b3b428c8177d16b5aded71afd3ca27e12a3
1 /*
2 * drivers/net/phy/davicom.c
4 * Driver for Davicom PHYs
6 * Author: Andy Fleming
8 * Copyright (c) 2004 Freescale Semiconductor, Inc.
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.
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>
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <linux/uaccess.h>
37 #define MII_DM9161_SCR 0x10
38 #define MII_DM9161_SCR_INIT 0x0610
39 #define MII_DM9161_SCR_RMII 0x0100
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)
56 /* DM9161 10BT Configuration/Status */
57 #define MII_DM9161_10BTCSR 0x12
58 #define MII_DM9161_10BTCSR_INIT 0x7800
60 MODULE_DESCRIPTION("Davicom PHY driver");
61 MODULE_AUTHOR("Andy Fleming");
62 MODULE_LICENSE("GPL");
65 #define DM9161_DELAY 1
66 static int dm9161_config_intr(struct phy_device *phydev)
68 int temp;
70 temp = phy_read(phydev, MII_DM9161_INTR);
72 if (temp < 0)
73 return temp;
75 if (PHY_INTERRUPT_ENABLED == phydev->interrupts)
76 temp &= ~(MII_DM9161_INTR_STOP);
77 else
78 temp |= MII_DM9161_INTR_STOP;
80 temp = phy_write(phydev, MII_DM9161_INTR, temp);
82 return temp;
85 static int dm9161_config_aneg(struct phy_device *phydev)
87 int err;
89 /* Isolate the PHY */
90 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
92 if (err < 0)
93 return err;
95 /* Configure the new settings */
96 err = genphy_config_aneg(phydev);
98 if (err < 0)
99 return err;
101 return 0;
104 static int dm9161_config_init(struct phy_device *phydev)
106 int err, temp;
108 /* Isolate the PHY */
109 err = phy_write(phydev, MII_BMCR, BMCR_ISOLATE);
111 if (err < 0)
112 return err;
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;
125 /* Do not bypass the scrambler/descrambler */
126 err = phy_write(phydev, MII_DM9161_SCR, temp);
127 if (err < 0)
128 return err;
130 /* Clear 10BTCSR to default */
131 err = phy_write(phydev, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
133 if (err < 0)
134 return err;
136 /* Reconnect the PHY, and enable Autonegotiation */
137 return phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
140 static int dm9161_ack_interrupt(struct phy_device *phydev)
142 int err = phy_read(phydev, MII_DM9161_INTR);
144 return (err < 0) ? err : 0;
147 static struct phy_driver dm91xx_driver[] = {
149 .phy_id = 0x0181b880,
150 .name = "Davicom DM9161E",
151 .phy_id_mask = 0x0ffffff0,
152 .features = PHY_BASIC_FEATURES,
153 .flags = PHY_HAS_INTERRUPT,
154 .config_init = dm9161_config_init,
155 .config_aneg = dm9161_config_aneg,
156 .ack_interrupt = dm9161_ack_interrupt,
157 .config_intr = dm9161_config_intr,
158 }, {
159 .phy_id = 0x0181b8b0,
160 .name = "Davicom DM9161B/C",
161 .phy_id_mask = 0x0ffffff0,
162 .features = PHY_BASIC_FEATURES,
163 .flags = PHY_HAS_INTERRUPT,
164 .config_init = dm9161_config_init,
165 .config_aneg = dm9161_config_aneg,
166 .ack_interrupt = dm9161_ack_interrupt,
167 .config_intr = dm9161_config_intr,
168 }, {
169 .phy_id = 0x0181b8a0,
170 .name = "Davicom DM9161A",
171 .phy_id_mask = 0x0ffffff0,
172 .features = PHY_BASIC_FEATURES,
173 .flags = PHY_HAS_INTERRUPT,
174 .config_init = dm9161_config_init,
175 .config_aneg = dm9161_config_aneg,
176 .ack_interrupt = dm9161_ack_interrupt,
177 .config_intr = dm9161_config_intr,
178 }, {
179 .phy_id = 0x00181b80,
180 .name = "Davicom DM9131",
181 .phy_id_mask = 0x0ffffff0,
182 .features = PHY_BASIC_FEATURES,
183 .flags = PHY_HAS_INTERRUPT,
184 .ack_interrupt = dm9161_ack_interrupt,
185 .config_intr = dm9161_config_intr,
186 } };
188 module_phy_driver(dm91xx_driver);
190 static struct mdio_device_id __maybe_unused davicom_tbl[] = {
191 { 0x0181b880, 0x0ffffff0 },
192 { 0x0181b8b0, 0x0ffffff0 },
193 { 0x0181b8a0, 0x0ffffff0 },
194 { 0x00181b80, 0x0ffffff0 },
198 MODULE_DEVICE_TABLE(mdio, davicom_tbl);