ar71xx: ag71xx: move link update function
[openwrt.git] / target / linux / ar71xx / files / 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         if (ag->phy_dev) {
48                 phy_start(ag->phy_dev);
49         } else {
50                 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
51
52                 ag->duplex = pdata->duplex;
53                 ag->speed = pdata->speed;
54                 ag->link = 1;
55                 ag71xx_link_adjust(ag);
56         }
57 }
58
59 void ag71xx_phy_stop(struct ag71xx *ag)
60 {
61         if (ag->phy_dev) {
62                 phy_stop(ag->phy_dev);
63         } else {
64                 ag->duplex = -1;
65                 ag->link = 0;
66                 ag->speed = 0;
67                 ag71xx_link_adjust(ag);
68         }
69 }
70
71 static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
72 {
73         struct net_device *dev = ag->dev;
74         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
75         int ret = 0;
76
77         /* use fixed settings */
78         switch (pdata->speed) {
79         case SPEED_10:
80         case SPEED_100:
81         case SPEED_1000:
82                 break;
83         default:
84                 printk(KERN_ERR "%s: invalid speed specified\n",
85                         dev->name);
86                 ret = -EINVAL;
87                 break;
88         }
89
90         return ret;
91 }
92
93 static int ag71xx_phy_connect_multi(struct ag71xx *ag)
94 {
95         struct net_device *dev = ag->dev;
96         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
97         struct phy_device *phydev = NULL;
98         int phy_count = 0;
99         int phy_addr;
100         int ret = 0;
101
102         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
103                 if (!(pdata->phy_mask & (1 << phy_addr)))
104                         continue;
105
106                 if (ag->mii_bus->phy_map[phy_addr] == NULL)
107                         continue;
108
109                 DBG("%s: PHY found at %s, uid=%08x\n",
110                         dev->name,
111                         dev_name(&ag->mii_bus->phy_map[phy_addr]->dev),
112                         ag->mii_bus->phy_map[phy_addr]->phy_id);
113
114                 if (phydev == NULL)
115                         phydev = ag->mii_bus->phy_map[phy_addr];
116
117                 phy_count++;
118         }
119
120         switch (phy_count) {
121         case 0:
122                 printk(KERN_ERR "%s: no PHY found with phy_mask=%08x\n",
123                         dev->name, pdata->phy_mask);
124                 ret = -ENODEV;
125                 break;
126         case 1:
127                 ag->phy_dev = phy_connect(dev, dev_name(&phydev->dev),
128                         &ag71xx_phy_link_adjust, 0, pdata->phy_if_mode);
129
130                 if (IS_ERR(ag->phy_dev)) {
131                         printk(KERN_ERR "%s: could not connect to PHY at %s\n",
132                                 dev->name, dev_name(&phydev->dev));
133                         return PTR_ERR(ag->phy_dev);
134                 }
135
136                 /* mask with MAC supported features */
137                 if (pdata->has_gbit)
138                         phydev->supported &= PHY_GBIT_FEATURES;
139                 else
140                         phydev->supported &= PHY_BASIC_FEATURES;
141
142                 phydev->advertising = phydev->supported;
143
144                 printk(KERN_DEBUG "%s: connected to PHY at %s "
145                         "[uid=%08x, driver=%s]\n",
146                         dev->name, dev_name(&phydev->dev),
147                         phydev->phy_id, phydev->drv->name);
148
149                 ag->link = 0;
150                 ag->speed = 0;
151                 ag->duplex = -1;
152                 break;
153
154         default:
155                 printk(KERN_DEBUG "%s: connected to %d PHYs\n",
156                         dev->name, phy_count);
157                 ret = ag71xx_phy_connect_fixed(ag);
158                 break;
159         }
160
161         return ret;
162 }
163
164 static int dev_is_class(struct device *dev, void *class)
165 {
166         if (dev->class != NULL && !strcmp(dev->class->name, class))
167                 return 1;
168
169         return 0;
170 }
171
172 static struct device *dev_find_class(struct device *parent, char *class)
173 {
174         if (dev_is_class(parent, class)) {
175                 get_device(parent);
176                 return parent;
177         }
178
179         return device_find_child(parent, class, dev_is_class);
180 }
181
182 static struct mii_bus *dev_to_mii_bus(struct device *dev)
183 {
184         struct device *d;
185
186         d = dev_find_class(dev, "mdio_bus");
187         if (d != NULL) {
188                 struct mii_bus *bus;
189
190                 bus = to_mii_bus(d);
191                 put_device(d);
192
193                 return bus;
194         }
195
196         return NULL;
197 }
198
199 int ag71xx_phy_connect(struct ag71xx *ag)
200 {
201         struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
202
203         ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
204         if (ag->mii_bus == NULL) {
205                 printk(KERN_ERR "%s: unable to find MII bus on device '%s'\n",
206                         ag->dev->name, dev_name(pdata->mii_bus_dev));
207                 return -ENODEV;
208         }
209
210         /* Reset the mdio bus explicitly */
211         if (ag->mii_bus->reset) {
212                 mutex_lock(&ag->mii_bus->mdio_lock);
213                 ag->mii_bus->reset(ag->mii_bus);
214                 mutex_unlock(&ag->mii_bus->mdio_lock);
215         }
216
217         if (pdata->phy_mask)
218                 return ag71xx_phy_connect_multi(ag);
219
220         return ag71xx_phy_connect_fixed(ag);
221 }
222
223 void ag71xx_phy_disconnect(struct ag71xx *ag)
224 {
225         if (ag->phy_dev)
226                 phy_disconnect(ag->phy_dev);
227 }