1 /* airport.c
2 *
3 * A driver for "Hermes" chipset based Apple Airport wireless
4 * card.
5 *
6 * Copyright notice & release notes in file orinoco.c
7 *
8 * Note specific to airport stub:
9 *
10 * 0.05 : first version of the new split driver
11 * 0.06 : fix possible hang on powerup, add sleep support
12 */
13
14 #define DRIVER_NAME "airport"
15 #define PFX DRIVER_NAME ": "
16
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/init.h>
20 #include <linux/delay.h>
21 #include <asm/pmac_feature.h>
22
23 #include "orinoco.h"
24
25 #define AIRPORT_IO_LEN (0x1000) /* one page */
26
27 struct airport {
28 struct macio_dev *mdev;
29 void __iomem *vaddr;
30 int irq_requested;
31 int ndev_registered;
32 };
33
34 static int
airport_suspend(struct macio_dev * mdev,pm_message_t state)35 airport_suspend(struct macio_dev *mdev, pm_message_t state)
36 {
37 struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
38 struct orinoco_private *priv = netdev_priv(dev);
39 unsigned long flags;
40 int err;
41
42 printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);
43
44 err = orinoco_lock(priv, &flags);
45 if (err) {
46 printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
47 dev->name);
48 return 0;
49 }
50
51 err = __orinoco_down(dev);
52 if (err)
53 printk(KERN_WARNING "%s: PBOOK_SLEEP_NOW: Error %d downing interface\n",
54 dev->name, err);
55
56 netif_device_detach(dev);
57
58 priv->hw_unavailable++;
59
60 orinoco_unlock(priv, &flags);
61
62 disable_irq(dev->irq);
63 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 0);
64
65 return 0;
66 }
67
68 static int
airport_resume(struct macio_dev * mdev)69 airport_resume(struct macio_dev *mdev)
70 {
71 struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
72 struct orinoco_private *priv = netdev_priv(dev);
73 unsigned long flags;
74 int err;
75
76 printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);
77
78 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 1);
79 msleep(200);
80
81 enable_irq(dev->irq);
82
83 err = orinoco_reinit_firmware(dev);
84 if (err) {
85 printk(KERN_ERR "%s: Error %d re-initializing firmware on PBOOK_WAKE\n",
86 dev->name, err);
87 return 0;
88 }
89
90 spin_lock_irqsave(&priv->lock, flags);
91
92 netif_device_attach(dev);
93
94 priv->hw_unavailable--;
95
96 if (priv->open && (! priv->hw_unavailable)) {
97 err = __orinoco_up(dev);
98 if (err)
99 printk(KERN_ERR "%s: Error %d restarting card on PBOOK_WAKE\n",
100 dev->name, err);
101 }
102
103
104 spin_unlock_irqrestore(&priv->lock, flags);
105
106 return 0;
107 }
108
109 static int
airport_detach(struct macio_dev * mdev)110 airport_detach(struct macio_dev *mdev)
111 {
112 struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
113 struct orinoco_private *priv = netdev_priv(dev);
114 struct airport *card = priv->card;
115
116 if (card->ndev_registered)
117 unregister_netdev(dev);
118 card->ndev_registered = 0;
119
120 if (card->irq_requested)
121 free_irq(dev->irq, dev);
122 card->irq_requested = 0;
123
124 if (card->vaddr)
125 iounmap(card->vaddr);
126 card->vaddr = NULL;
127
128 macio_release_resource(mdev, 0);
129
130 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 0);
131 ssleep(1);
132
133 macio_set_drvdata(mdev, NULL);
134 free_orinocodev(dev);
135
136 return 0;
137 }
138
airport_hard_reset(struct orinoco_private * priv)139 static int airport_hard_reset(struct orinoco_private *priv)
140 {
141 /* It would be nice to power cycle the Airport for a real hard
142 * reset, but for some reason although it appears to
143 * re-initialize properly, it falls in a screaming heap
144 * shortly afterwards. */
145 #if 0
146 struct net_device *dev = priv->ndev;
147 struct airport *card = priv->card;
148
149 /* Vitally important. If we don't do this it seems we get an
150 * interrupt somewhere during the power cycle, since
151 * hw_unavailable is already set it doesn't get ACKed, we get
152 * into an interrupt loop and the PMU decides to turn us
153 * off. */
154 disable_irq(dev->irq);
155
156 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(card->mdev), 0, 0);
157 ssleep(1);
158 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(card->mdev), 0, 1);
159 ssleep(1);
160
161 enable_irq(dev->irq);
162 ssleep(1);
163 #endif
164
165 return 0;
166 }
167
168 static int
airport_attach(struct macio_dev * mdev,const struct of_device_id * match)169 airport_attach(struct macio_dev *mdev, const struct of_device_id *match)
170 {
171 struct orinoco_private *priv;
172 struct net_device *dev;
173 struct airport *card;
174 unsigned long phys_addr;
175 hermes_t *hw;
176
177 if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
178 printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
179 return -ENODEV;
180 }
181
182 /* Allocate space for private device-specific data */
183 dev = alloc_orinocodev(sizeof(*card), &mdev->ofdev.dev,
184 airport_hard_reset, NULL);
185 if (! dev) {
186 printk(KERN_ERR PFX "Cannot allocate network device\n");
187 return -ENODEV;
188 }
189 priv = netdev_priv(dev);
190 card = priv->card;
191
192 hw = &priv->hw;
193 card->mdev = mdev;
194
195 if (macio_request_resource(mdev, 0, "airport")) {
196 printk(KERN_ERR PFX "can't request IO resource !\n");
197 free_orinocodev(dev);
198 return -EBUSY;
199 }
200
201 SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
202
203 macio_set_drvdata(mdev, dev);
204
205 /* Setup interrupts & base address */
206 dev->irq = macio_irq(mdev, 0);
207 phys_addr = macio_resource_start(mdev, 0); /* Physical address */
208 printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
209 dev->base_addr = phys_addr;
210 card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
211 if (!card->vaddr) {
212 printk(KERN_ERR PFX "ioremap() failed\n");
213 goto failed;
214 }
215
216 hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);
217
218 /* Power up card */
219 pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 1);
220 ssleep(1);
221
222 /* Reset it before we get the interrupt */
223 hermes_init(hw);
224
225 if (request_irq(dev->irq, orinoco_interrupt, 0, dev->name, dev)) {
226 printk(KERN_ERR PFX "Couldn't get IRQ %d\n", dev->irq);
227 goto failed;
228 }
229 card->irq_requested = 1;
230
231 /* Tell the stack we exist */
232 if (register_netdev(dev) != 0) {
233 printk(KERN_ERR PFX "register_netdev() failed\n");
234 goto failed;
235 }
236 printk(KERN_DEBUG PFX "Card registered for interface %s\n", dev->name);
237 card->ndev_registered = 1;
238 return 0;
239 failed:
240 airport_detach(mdev);
241 return -ENODEV;
242 } /* airport_attach */
243
244
245 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
246 " (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
247 MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
248 MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
249 MODULE_LICENSE("Dual MPL/GPL");
250
251 static struct of_device_id airport_match[] =
252 {
253 {
254 .name = "radio",
255 },
256 {},
257 };
258
259 MODULE_DEVICE_TABLE (of, airport_match);
260
261 static struct macio_driver airport_driver =
262 {
263 .name = DRIVER_NAME,
264 .match_table = airport_match,
265 .probe = airport_attach,
266 .remove = airport_detach,
267 .suspend = airport_suspend,
268 .resume = airport_resume,
269 };
270
271 static int __init
init_airport(void)272 init_airport(void)
273 {
274 printk(KERN_DEBUG "%s\n", version);
275
276 return macio_register_driver(&airport_driver);
277 }
278
279 static void __exit
exit_airport(void)280 exit_airport(void)
281 {
282 macio_unregister_driver(&airport_driver);
283 }
284
285 module_init(init_airport);
286 module_exit(exit_airport);
287