ar71xx: move arch specific files to files-2.6.39
[openwrt/svn-archive/archive.git] / target / linux / ar71xx / files-2.6.39 / drivers / net / ag71xx / ag71xx_phy.c
1 /*
2 * Atheros AR71xx built-in ethernet mac driver
3 *
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
6 *
7 * Based on Atheros' AG7100 driver
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
12 */
13
14 #include "ag71xx.h"
15
16 static void ag71xx_phy_link_adjust(struct net_device *dev)
17 {
18 struct ag71xx *ag = netdev_priv(dev);
19 struct phy_device *phydev = ag->phy_dev;
20 unsigned long flags;
21 int status_change = 0;
22
23 spin_lock_irqsave(&ag->lock, flags);
24
25 if (phydev->link) {
26 if (ag->duplex != phydev->duplex
27 || ag->speed != phydev->speed) {
28 status_change = 1;
29 }
30 }
31
32 if (phydev->link != ag->link)
33 status_change = 1;
34
35 ag->link = phydev->link;
36 ag->duplex = phydev->duplex;
37 ag->speed = phydev->speed;
38
39 if (status_change)
40 ag71xx_link_adjust(ag);
41
42 spin_unlock_irqrestore(&ag->lock, flags);
43 }
44
45 void ag71xx_phy_start(struct ag71xx *ag)
46 {
47 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
48
49 if (ag->phy_dev) {
50 phy_start(ag->phy_dev);
51 } else if (pdata->switch_data) {
52 ag71xx_ar7240_start(ag);
53 } else {
54 ag->link = 1;
55 ag71xx_link_adjust(ag);
56 }
57 }
58
59 void ag71xx_phy_stop(struct ag71xx *ag)
60 {
61 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
62 unsigned long flags;
63
64 if (ag->phy_dev)
65 phy_stop(ag->phy_dev);
66 else if (pdata->switch_data)
67 ag71xx_ar7240_stop(ag);
68
69 spin_lock_irqsave(&ag->lock, flags);
70 if (ag->link) {
71 ag->link = 0;
72 ag71xx_link_adjust(ag);
73 }
74 spin_unlock_irqrestore(&ag->lock, flags);
75 }
76
77 static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
78 {
79 struct net_device *dev = ag->dev;
80 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
81 int ret = 0;
82
83 /* use fixed settings */
84 switch (pdata->speed) {
85 case SPEED_10:
86 case SPEED_100:
87 case SPEED_1000:
88 break;
89 default:
90 printk(KERN_ERR "%s: invalid speed specified\n", dev->name);
91 ret = -EINVAL;
92 break;
93 }
94
95 printk(KERN_DEBUG "%s: using fixed link parameters\n", dev->name);
96
97 ag->duplex = pdata->duplex;
98 ag->speed = pdata->speed;
99
100 return ret;
101 }
102
103 static int ag71xx_phy_connect_multi(struct ag71xx *ag)
104 {
105 struct net_device *dev = ag->dev;
106 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
107 struct phy_device *phydev = NULL;
108 int phy_addr;
109 int ret = 0;
110
111 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
112 if (!(pdata->phy_mask & (1 << phy_addr)))
113 continue;
114
115 if (ag->mii_bus->phy_map[phy_addr] == NULL)
116 continue;
117
118 DBG("%s: PHY found at %s, uid=%08x\n",
119 dev->name,
120 dev_name(&ag->mii_bus->phy_map[phy_addr]->dev),
121 ag->mii_bus->phy_map[phy_addr]->phy_id);
122
123 if (phydev == NULL)
124 phydev = ag->mii_bus->phy_map[phy_addr];
125 }
126
127 if (!phydev) {
128 printk(KERN_ERR "%s: no PHY found with phy_mask=%08x\n",
129 dev->name, pdata->phy_mask);
130 return -ENODEV;
131 }
132
133 ag->phy_dev = phy_connect(dev, dev_name(&phydev->dev),
134 &ag71xx_phy_link_adjust, 0,
135 pdata->phy_if_mode);
136
137 if (IS_ERR(ag->phy_dev)) {
138 printk(KERN_ERR "%s: could not connect to PHY at %s\n",
139 dev->name, dev_name(&phydev->dev));
140 return PTR_ERR(ag->phy_dev);
141 }
142
143 /* mask with MAC supported features */
144 if (pdata->has_gbit)
145 phydev->supported &= PHY_GBIT_FEATURES;
146 else
147 phydev->supported &= PHY_BASIC_FEATURES;
148
149 phydev->advertising = phydev->supported;
150
151 printk(KERN_DEBUG "%s: connected to PHY at %s [uid=%08x, driver=%s]\n",
152 dev->name, dev_name(&phydev->dev),
153 phydev->phy_id, phydev->drv->name);
154
155 ag->link = 0;
156 ag->speed = 0;
157 ag->duplex = -1;
158
159 return ret;
160 }
161
162 static int dev_is_class(struct device *dev, void *class)
163 {
164 if (dev->class != NULL && !strcmp(dev->class->name, class))
165 return 1;
166
167 return 0;
168 }
169
170 static struct device *dev_find_class(struct device *parent, char *class)
171 {
172 if (dev_is_class(parent, class)) {
173 get_device(parent);
174 return parent;
175 }
176
177 return device_find_child(parent, class, dev_is_class);
178 }
179
180 static struct mii_bus *dev_to_mii_bus(struct device *dev)
181 {
182 struct device *d;
183
184 d = dev_find_class(dev, "mdio_bus");
185 if (d != NULL) {
186 struct mii_bus *bus;
187
188 bus = to_mii_bus(d);
189 put_device(d);
190
191 return bus;
192 }
193
194 return NULL;
195 }
196
197 int __devinit ag71xx_phy_connect(struct ag71xx *ag)
198 {
199 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
200
201 if (pdata->mii_bus_dev == NULL ||
202 pdata->mii_bus_dev->bus == NULL )
203 return ag71xx_phy_connect_fixed(ag);
204
205 ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
206 if (ag->mii_bus == NULL) {
207 printk(KERN_ERR "%s: unable to find MII bus on device '%s'\n",
208 ag->dev->name, dev_name(pdata->mii_bus_dev));
209 return -ENODEV;
210 }
211
212 /* Reset the mdio bus explicitly */
213 if (ag->mii_bus->reset) {
214 mutex_lock(&ag->mii_bus->mdio_lock);
215 ag->mii_bus->reset(ag->mii_bus);
216 mutex_unlock(&ag->mii_bus->mdio_lock);
217 }
218
219 if (pdata->switch_data)
220 return ag71xx_ar7240_init(ag);
221
222 if (pdata->phy_mask)
223 return ag71xx_phy_connect_multi(ag);
224
225 return ag71xx_phy_connect_fixed(ag);
226 }
227
228 void ag71xx_phy_disconnect(struct ag71xx *ag)
229 {
230 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
231
232 if (pdata->switch_data)
233 ag71xx_ar7240_cleanup(ag);
234 else if (ag->phy_dev)
235 phy_disconnect(ag->phy_dev);
236 }