Commit | Line | Data |
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0cefeeba MB |
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> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/interrupt.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/netdevice.h> | |
21 | #include <linux/etherdevice.h> | |
22 | #include <linux/skbuff.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/mii.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/phy.h> | |
29 | ||
30 | #include <asm/io.h> | |
31 | #include <asm/irq.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | MODULE_DESCRIPTION("ICPlus IP175C PHY driver"); | |
35 | MODULE_AUTHOR("Michael Barkowski"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
38 | static int ip175c_config_init(struct phy_device *phydev) | |
39 | { | |
40 | int err, i; | |
41 | static int full_reset_performed = 0; | |
42 | ||
43 | if (full_reset_performed == 0) { | |
44 | ||
45 | /* master reset */ | |
46 | err = phydev->bus->write(phydev->bus, 30, 0, 0x175c); | |
47 | if (err < 0) | |
48 | return err; | |
49 | ||
50 | /* ensure no bus delays overlap reset period */ | |
51 | err = phydev->bus->read(phydev->bus, 30, 0); | |
52 | ||
53 | /* data sheet specifies reset period is 2 msec */ | |
54 | mdelay(2); | |
55 | ||
56 | /* enable IP175C mode */ | |
57 | err = phydev->bus->write(phydev->bus, 29, 31, 0x175c); | |
58 | if (err < 0) | |
59 | return err; | |
60 | ||
61 | /* Set MII0 speed and duplex (in PHY mode) */ | |
62 | err = phydev->bus->write(phydev->bus, 29, 22, 0x420); | |
63 | if (err < 0) | |
64 | return err; | |
65 | ||
66 | /* reset switch ports */ | |
67 | for (i = 0; i < 5; i++) { | |
68 | err = phydev->bus->write(phydev->bus, i, | |
69 | MII_BMCR, BMCR_RESET); | |
70 | if (err < 0) | |
71 | return err; | |
72 | } | |
73 | ||
74 | for (i = 0; i < 5; i++) | |
75 | err = phydev->bus->read(phydev->bus, i, MII_BMCR); | |
76 | ||
77 | mdelay(2); | |
78 | ||
79 | full_reset_performed = 1; | |
80 | } | |
81 | ||
82 | if (phydev->addr != 4) { | |
83 | phydev->state = PHY_RUNNING; | |
84 | phydev->speed = SPEED_100; | |
85 | phydev->duplex = DUPLEX_FULL; | |
86 | phydev->link = 1; | |
87 | netif_carrier_on(phydev->attached_dev); | |
88 | } | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | static int ip175c_read_status(struct phy_device *phydev) | |
94 | { | |
95 | if (phydev->addr == 4) /* WAN port */ | |
96 | genphy_read_status(phydev); | |
97 | else | |
98 | /* Don't need to read status for switch ports */ | |
99 | phydev->irq = PHY_IGNORE_INTERRUPT; | |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
104 | static int ip175c_config_aneg(struct phy_device *phydev) | |
105 | { | |
106 | if (phydev->addr == 4) /* WAN port */ | |
107 | genphy_config_aneg(phydev); | |
108 | ||
109 | return 0; | |
110 | } | |
111 | ||
112 | static struct phy_driver ip175c_driver = { | |
113 | .phy_id = 0x02430d80, | |
114 | .name = "ICPlus IP175C", | |
115 | .phy_id_mask = 0x0ffffff0, | |
116 | .features = PHY_BASIC_FEATURES, | |
117 | .config_init = &ip175c_config_init, | |
118 | .config_aneg = &ip175c_config_aneg, | |
119 | .read_status = &ip175c_read_status, | |
120 | .driver = { .owner = THIS_MODULE,}, | |
121 | }; | |
122 | ||
123 | static int __init ip175c_init(void) | |
124 | { | |
125 | return phy_driver_register(&ip175c_driver); | |
126 | } | |
127 | ||
128 | static void __exit ip175c_exit(void) | |
129 | { | |
130 | phy_driver_unregister(&ip175c_driver); | |
131 | } | |
132 | ||
133 | module_init(ip175c_init); | |
134 | module_exit(ip175c_exit); |