1 /*
2 * drivers/net/phy/ste10Xp.c
3 *
4 * Driver for STMicroelectronics STe10Xp PHYs
5 *
6 * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
7 *
8 * Copyright (c) 2008 STMicroelectronics Limited
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
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.h>
21 #include <linux/moduleparam.h>
22 #include <linux/interrupt.h>
23 #include <linux/netdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/mii.h>
26 #include <linux/phy.h>
27
28 #define MII_XCIIS 0x11 /* Configuration Info IRQ & Status Reg */
29 #define MII_XIE 0x12 /* Interrupt Enable Register */
30 #define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */
31
32 #define STE101P_PHY_ID 0x00061c50
33 #define STE100P_PHY_ID 0x1c040011
34
ste10Xp_config_init(struct phy_device * phydev)35 static int ste10Xp_config_init(struct phy_device *phydev)
36 {
37 int value, err;
38
39 /* Software Reset PHY */
40 value = phy_read(phydev, MII_BMCR);
41 if (value < 0)
42 return value;
43
44 value |= BMCR_RESET;
45 err = phy_write(phydev, MII_BMCR, value);
46 if (err < 0)
47 return err;
48
49 do {
50 value = phy_read(phydev, MII_BMCR);
51 } while (value & BMCR_RESET);
52
53 return 0;
54 }
55
ste10Xp_config_intr(struct phy_device * phydev)56 static int ste10Xp_config_intr(struct phy_device *phydev)
57 {
58 int err, value;
59
60 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
61 /* Enable all STe101P interrupts (PR12) */
62 err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
63 /* clear any pending interrupts */
64 if (err == 0) {
65 value = phy_read(phydev, MII_XCIIS);
66 if (value < 0)
67 err = value;
68 }
69 } else
70 err = phy_write(phydev, MII_XIE, 0);
71
72 return err;
73 }
74
ste10Xp_ack_interrupt(struct phy_device * phydev)75 static int ste10Xp_ack_interrupt(struct phy_device *phydev)
76 {
77 int err = phy_read(phydev, MII_XCIIS);
78 if (err < 0)
79 return err;
80
81 return 0;
82 }
83
84 static struct phy_driver ste101p_pdriver = {
85 .phy_id = STE101P_PHY_ID,
86 .phy_id_mask = 0xfffffff0,
87 .name = "STe101p",
88 .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
89 .flags = PHY_HAS_INTERRUPT,
90 .config_init = ste10Xp_config_init,
91 .config_aneg = genphy_config_aneg,
92 .read_status = genphy_read_status,
93 .ack_interrupt = ste10Xp_ack_interrupt,
94 .config_intr = ste10Xp_config_intr,
95 .suspend = genphy_suspend,
96 .resume = genphy_resume,
97 .driver = {.owner = THIS_MODULE,}
98 };
99
100 static struct phy_driver ste100p_pdriver = {
101 .phy_id = STE100P_PHY_ID,
102 .phy_id_mask = 0xffffffff,
103 .name = "STe100p",
104 .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
105 .flags = PHY_HAS_INTERRUPT,
106 .config_init = ste10Xp_config_init,
107 .config_aneg = genphy_config_aneg,
108 .read_status = genphy_read_status,
109 .ack_interrupt = ste10Xp_ack_interrupt,
110 .config_intr = ste10Xp_config_intr,
111 .suspend = genphy_suspend,
112 .resume = genphy_resume,
113 .driver = {.owner = THIS_MODULE,}
114 };
115
ste10Xp_init(void)116 static int __init ste10Xp_init(void)
117 {
118 int retval;
119
120 retval = phy_driver_register(&ste100p_pdriver);
121 if (retval < 0)
122 return retval;
123 return phy_driver_register(&ste101p_pdriver);
124 }
125
ste10Xp_exit(void)126 static void __exit ste10Xp_exit(void)
127 {
128 phy_driver_unregister(&ste100p_pdriver);
129 phy_driver_unregister(&ste101p_pdriver);
130 }
131
132 module_init(ste10Xp_init);
133 module_exit(ste10Xp_exit);
134
135 static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
136 { STE101P_PHY_ID, 0xfffffff0 },
137 { STE100P_PHY_ID, 0xffffffff },
138 { }
139 };
140
141 MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);
142
143 MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
144 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
145 MODULE_LICENSE("GPL");
146