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00db8189 AF |
1 | /* |
2 | * drivers/net/phy/mdio_bus.c | |
3 | * | |
4 | * MDIO Bus interface | |
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/config.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/delay.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/version.h> | |
33 | #include <linux/mii.h> | |
34 | #include <linux/ethtool.h> | |
35 | #include <linux/phy.h> | |
36 | ||
37 | #include <asm/io.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
e1393456 AF |
41 | /* mdiobus_register |
42 | * | |
43 | * description: Called by a bus driver to bring up all the PHYs | |
44 | * on a given bus, and attach them to the bus | |
45 | */ | |
46 | int mdiobus_register(struct mii_bus *bus) | |
47 | { | |
48 | int i; | |
49 | int err = 0; | |
50 | ||
51 | spin_lock_init(&bus->mdio_lock); | |
52 | ||
53 | if (NULL == bus || NULL == bus->name || | |
54 | NULL == bus->read || | |
55 | NULL == bus->write) | |
56 | return -EINVAL; | |
57 | ||
58 | if (bus->reset) | |
59 | bus->reset(bus); | |
60 | ||
61 | for (i = 0; i < PHY_MAX_ADDR; i++) { | |
62 | struct phy_device *phydev; | |
63 | ||
64 | phydev = get_phy_device(bus, i); | |
65 | ||
66 | if (IS_ERR(phydev)) | |
67 | return PTR_ERR(phydev); | |
68 | ||
69 | /* There's a PHY at this address | |
70 | * We need to set: | |
71 | * 1) IRQ | |
72 | * 2) bus_id | |
73 | * 3) parent | |
74 | * 4) bus | |
75 | * 5) mii_bus | |
76 | * And, we need to register it */ | |
77 | if (phydev) { | |
78 | phydev->irq = bus->irq[i]; | |
79 | ||
80 | phydev->dev.parent = bus->dev; | |
81 | phydev->dev.bus = &mdio_bus_type; | |
82 | sprintf(phydev->dev.bus_id, "phy%d:%d", bus->id, i); | |
83 | ||
84 | phydev->bus = bus; | |
85 | ||
86 | err = device_register(&phydev->dev); | |
87 | ||
88 | if (err) | |
89 | printk(KERN_ERR "phy %d failed to register\n", | |
90 | i); | |
91 | } | |
92 | ||
93 | bus->phy_map[i] = phydev; | |
94 | } | |
95 | ||
96 | pr_info("%s: probed\n", bus->name); | |
97 | ||
98 | return err; | |
99 | } | |
100 | EXPORT_SYMBOL(mdiobus_register); | |
101 | ||
102 | void mdiobus_unregister(struct mii_bus *bus) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i = 0; i < PHY_MAX_ADDR; i++) { | |
107 | if (bus->phy_map[i]) { | |
108 | device_unregister(&bus->phy_map[i]->dev); | |
109 | kfree(bus->phy_map[i]); | |
110 | } | |
111 | } | |
112 | } | |
113 | EXPORT_SYMBOL(mdiobus_unregister); | |
114 | ||
00db8189 AF |
115 | /* mdio_bus_match |
116 | * | |
117 | * description: Given a PHY device, and a PHY driver, return 1 if | |
118 | * the driver supports the device. Otherwise, return 0 | |
119 | */ | |
120 | static int mdio_bus_match(struct device *dev, struct device_driver *drv) | |
121 | { | |
122 | struct phy_device *phydev = to_phy_device(dev); | |
123 | struct phy_driver *phydrv = to_phy_driver(drv); | |
124 | ||
125 | return (phydrv->phy_id == (phydev->phy_id & phydrv->phy_id_mask)); | |
126 | } | |
127 | ||
128 | /* Suspend and resume. Copied from platform_suspend and | |
129 | * platform_resume | |
130 | */ | |
829ca9a3 | 131 | static int mdio_bus_suspend(struct device * dev, pm_message_t state) |
00db8189 AF |
132 | { |
133 | int ret = 0; | |
134 | struct device_driver *drv = dev->driver; | |
135 | ||
136 | if (drv && drv->suspend) { | |
137 | ret = drv->suspend(dev, state, SUSPEND_DISABLE); | |
138 | if (ret == 0) | |
139 | ret = drv->suspend(dev, state, SUSPEND_SAVE_STATE); | |
140 | if (ret == 0) | |
141 | ret = drv->suspend(dev, state, SUSPEND_POWER_DOWN); | |
142 | } | |
143 | return ret; | |
144 | } | |
145 | ||
146 | static int mdio_bus_resume(struct device * dev) | |
147 | { | |
148 | int ret = 0; | |
149 | struct device_driver *drv = dev->driver; | |
150 | ||
151 | if (drv && drv->resume) { | |
152 | ret = drv->resume(dev, RESUME_POWER_ON); | |
153 | if (ret == 0) | |
154 | ret = drv->resume(dev, RESUME_RESTORE_STATE); | |
155 | if (ret == 0) | |
156 | ret = drv->resume(dev, RESUME_ENABLE); | |
157 | } | |
158 | return ret; | |
159 | } | |
160 | ||
161 | struct bus_type mdio_bus_type = { | |
162 | .name = "mdio_bus", | |
163 | .match = mdio_bus_match, | |
164 | .suspend = mdio_bus_suspend, | |
165 | .resume = mdio_bus_resume, | |
166 | }; | |
167 | ||
67c4f3fa | 168 | int __init mdio_bus_init(void) |
00db8189 AF |
169 | { |
170 | return bus_register(&mdio_bus_type); | |
171 | } | |
172 | ||
e1393456 AF |
173 | void __exit mdio_bus_exit(void) |
174 | { | |
175 | bus_unregister(&mdio_bus_type); | |
176 | } |