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1 | /* |
2 | * Driver for ICPlus PHYs | |
3 | * | |
4 | * Copyright (c) 2007 Freescale Semiconductor, Inc. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | */ | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/unistd.h> | |
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16 | #include <linux/interrupt.h> |
17 | #include <linux/init.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/skbuff.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/mii.h> | |
26 | #include <linux/ethtool.h> | |
27 | #include <linux/phy.h> | |
28 | ||
29 | #include <asm/io.h> | |
30 | #include <asm/irq.h> | |
31 | #include <asm/uaccess.h> | |
32 | ||
33 | MODULE_DESCRIPTION("ICPlus IP175C PHY driver"); | |
34 | MODULE_AUTHOR("Michael Barkowski"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | static int ip175c_config_init(struct phy_device *phydev) | |
38 | { | |
39 | int err, i; | |
40 | static int full_reset_performed = 0; | |
41 | ||
42 | if (full_reset_performed == 0) { | |
43 | ||
44 | /* master reset */ | |
45 | err = phydev->bus->write(phydev->bus, 30, 0, 0x175c); | |
46 | if (err < 0) | |
47 | return err; | |
48 | ||
49 | /* ensure no bus delays overlap reset period */ | |
50 | err = phydev->bus->read(phydev->bus, 30, 0); | |
51 | ||
52 | /* data sheet specifies reset period is 2 msec */ | |
53 | mdelay(2); | |
54 | ||
55 | /* enable IP175C mode */ | |
56 | err = phydev->bus->write(phydev->bus, 29, 31, 0x175c); | |
57 | if (err < 0) | |
58 | return err; | |
59 | ||
60 | /* Set MII0 speed and duplex (in PHY mode) */ | |
61 | err = phydev->bus->write(phydev->bus, 29, 22, 0x420); | |
62 | if (err < 0) | |
63 | return err; | |
64 | ||
65 | /* reset switch ports */ | |
66 | for (i = 0; i < 5; i++) { | |
67 | err = phydev->bus->write(phydev->bus, i, | |
68 | MII_BMCR, BMCR_RESET); | |
69 | if (err < 0) | |
70 | return err; | |
71 | } | |
72 | ||
73 | for (i = 0; i < 5; i++) | |
74 | err = phydev->bus->read(phydev->bus, i, MII_BMCR); | |
75 | ||
76 | mdelay(2); | |
77 | ||
78 | full_reset_performed = 1; | |
79 | } | |
80 | ||
81 | if (phydev->addr != 4) { | |
82 | phydev->state = PHY_RUNNING; | |
83 | phydev->speed = SPEED_100; | |
84 | phydev->duplex = DUPLEX_FULL; | |
85 | phydev->link = 1; | |
86 | netif_carrier_on(phydev->attached_dev); | |
87 | } | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | static int ip175c_read_status(struct phy_device *phydev) | |
93 | { | |
94 | if (phydev->addr == 4) /* WAN port */ | |
95 | genphy_read_status(phydev); | |
96 | else | |
97 | /* Don't need to read status for switch ports */ | |
98 | phydev->irq = PHY_IGNORE_INTERRUPT; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int ip175c_config_aneg(struct phy_device *phydev) | |
104 | { | |
105 | if (phydev->addr == 4) /* WAN port */ | |
106 | genphy_config_aneg(phydev); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static struct phy_driver ip175c_driver = { | |
112 | .phy_id = 0x02430d80, | |
113 | .name = "ICPlus IP175C", | |
114 | .phy_id_mask = 0x0ffffff0, | |
115 | .features = PHY_BASIC_FEATURES, | |
116 | .config_init = &ip175c_config_init, | |
117 | .config_aneg = &ip175c_config_aneg, | |
118 | .read_status = &ip175c_read_status, | |
dab10863 GC |
119 | .suspend = genphy_suspend, |
120 | .resume = genphy_resume, | |
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121 | .driver = { .owner = THIS_MODULE,}, |
122 | }; | |
123 | ||
124 | static int __init ip175c_init(void) | |
125 | { | |
126 | return phy_driver_register(&ip175c_driver); | |
127 | } | |
128 | ||
129 | static void __exit ip175c_exit(void) | |
130 | { | |
131 | phy_driver_unregister(&ip175c_driver); | |
132 | } | |
133 | ||
134 | module_init(ip175c_init); | |
135 | module_exit(ip175c_exit); | |
4e4f10f6 | 136 | |
cf93c945 | 137 | static struct mdio_device_id __maybe_unused icplus_tbl[] = { |
4e4f10f6 DW |
138 | { 0x02430d80, 0x0ffffff0 }, |
139 | { } | |
140 | }; | |
141 | ||
142 | MODULE_DEVICE_TABLE(mdio, icplus_tbl); |