ar71xx: rename ethernet pdata->builtin_switch to use_flow_control
[openwrt/openwrt.git] / target / linux / ar71xx / files / drivers / net / ethernet / atheros / 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->mii_bus_dev && 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->mii_bus_dev && 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 device *dev = &ag->pdev->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 dev_err(dev, "invalid speed specified\n");
91 ret = -EINVAL;
92 break;
93 }
94
95 dev_dbg(dev, "using fixed link parameters\n");
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 device *dev = &ag->pdev->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(dev),
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 dev_err(dev, "no PHY found with phy_mask=%08x\n",
129 pdata->phy_mask);
130 return -ENODEV;
131 }
132
133 ag->phy_dev = phy_connect(ag->dev, dev_name(&phydev->dev),
134 &ag71xx_phy_link_adjust,
135 pdata->phy_if_mode);
136
137 if (IS_ERR(ag->phy_dev)) {
138 dev_err(dev, "could not connect to PHY at %s\n",
139 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 dev_info(dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
152 dev_name(&phydev->dev), phydev->phy_id, phydev->drv->name);
153
154 ag->link = 0;
155 ag->speed = 0;
156 ag->duplex = -1;
157
158 return ret;
159 }
160
161 static int dev_is_class(struct device *dev, void *class)
162 {
163 if (dev->class != NULL && !strcmp(dev->class->name, class))
164 return 1;
165
166 return 0;
167 }
168
169 static struct device *dev_find_class(struct device *parent, char *class)
170 {
171 if (dev_is_class(parent, class)) {
172 get_device(parent);
173 return parent;
174 }
175
176 return device_find_child(parent, class, dev_is_class);
177 }
178
179 static struct mii_bus *dev_to_mii_bus(struct device *dev)
180 {
181 struct device *d;
182
183 d = dev_find_class(dev, "mdio_bus");
184 if (d != NULL) {
185 struct mii_bus *bus;
186
187 bus = to_mii_bus(d);
188 put_device(d);
189
190 return bus;
191 }
192
193 return NULL;
194 }
195
196 int ag71xx_phy_connect(struct ag71xx *ag)
197 {
198 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
199
200 if (pdata->mii_bus_dev == NULL ||
201 pdata->mii_bus_dev->bus == NULL )
202 return ag71xx_phy_connect_fixed(ag);
203
204 ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
205 if (ag->mii_bus == NULL) {
206 dev_err(&ag->pdev->dev, "unable to find MII bus on device '%s'\n",
207 dev_name(pdata->mii_bus_dev));
208 return -ENODEV;
209 }
210
211 /* Reset the mdio bus explicitly */
212 if (ag->mii_bus->reset) {
213 mutex_lock(&ag->mii_bus->mdio_lock);
214 ag->mii_bus->reset(ag->mii_bus);
215 mutex_unlock(&ag->mii_bus->mdio_lock);
216 }
217
218 if (pdata->switch_data)
219 return ag71xx_ar7240_init(ag);
220
221 if (pdata->phy_mask)
222 return ag71xx_phy_connect_multi(ag);
223
224 return ag71xx_phy_connect_fixed(ag);
225 }
226
227 void ag71xx_phy_disconnect(struct ag71xx *ag)
228 {
229 struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
230
231 if (pdata->switch_data)
232 ag71xx_ar7240_cleanup(ag);
233 else if (ag->phy_dev)
234 phy_disconnect(ag->phy_dev);
235 }