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