aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/airport.c
blob: b4f4bd7956a24f18e1873c129b942391af158b9c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
/* airport.c
 *
 * A driver for "Hermes" chipset based Apple Airport wireless
 * card.
 *
 * Copyright notice & release notes in file orinoco.c
 * 
 * Note specific to airport stub:
 * 
 *  0.05 : first version of the new split driver
 *  0.06 : fix possible hang on powerup, add sleep support
 */

#define DRIVER_NAME "airport"
#define PFX DRIVER_NAME ": "

#include <linux/config.h>

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>

#include <asm/io.h>
#include <asm/system.h>
#include <asm/current.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

#include "orinoco.h"

#define AIRPORT_IO_LEN	(0x1000)	/* one page */

struct airport {
	struct macio_dev *mdev;
	void __iomem *vaddr;
	int irq_requested;
	int ndev_registered;
};

static int
airport_suspend(struct macio_dev *mdev, pm_message_t state)
{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport entering sleep mode\n", dev->name);

	err = orinoco_lock(priv, &flags);
	if (err) {
		printk(KERN_ERR "%s: hw_unavailable on PBOOK_SLEEP_NOW\n",
		       dev->name);
		return 0;
	}

	err = __orinoco_down(dev);
	if (err)
		printk(KERN_WARNING "%s: PBOOK_SLEEP_NOW: Error %d downing interface\n",
		       dev->name, err);

	netif_device_detach(dev);

	priv->hw_unavailable++;

	orinoco_unlock(priv, &flags);

	disable_irq(dev->irq);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 0);

	return 0;
}

static int
airport_resume(struct macio_dev *mdev)
{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	unsigned long flags;
	int err;

	printk(KERN_DEBUG "%s: Airport waking up\n", dev->name);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 1);
	msleep(200);

	enable_irq(dev->irq);

	err = orinoco_reinit_firmware(dev);
	if (err) {
		printk(KERN_ERR "%s: Error %d re-initializing firmware on PBOOK_WAKE\n",
		       dev->name, err);
		return 0;
	}

	spin_lock_irqsave(&priv->lock, flags);

	netif_device_attach(dev);

	priv->hw_unavailable--;

	if (priv->open && (! priv->hw_unavailable)) {
		err = __orinoco_up(dev);
		if (err)
			printk(KERN_ERR "%s: Error %d restarting card on PBOOK_WAKE\n",
			       dev->name, err);
	}


	spin_unlock_irqrestore(&priv->lock, flags);

	return 0;
}

static int
airport_detach(struct macio_dev *mdev)
{
	struct net_device *dev = dev_get_drvdata(&mdev->ofdev.dev);
	struct orinoco_private *priv = netdev_priv(dev);
	struct airport *card = priv->card;

	if (card->ndev_registered)
		unregister_netdev(dev);
	card->ndev_registered = 0;

	if (card->irq_requested)
		free_irq(dev->irq, dev);
	card->irq_requested = 0;

	if (card->vaddr)
		iounmap(card->vaddr);
	card->vaddr = NULL;

	macio_release_resource(mdev, 0);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 0);
	ssleep(1);

	macio_set_drvdata(mdev, NULL);
	free_orinocodev(dev);

	return 0;
}

static int airport_hard_reset(struct orinoco_private *priv)
{
	/* It would be nice to power cycle the Airport for a real hard
	 * reset, but for some reason although it appears to
	 * re-initialize properly, it falls in a screaming heap
	 * shortly afterwards. */
#if 0
	struct net_device *dev = priv->ndev;
	struct airport *card = priv->card;

	/* Vitally important.  If we don't do this it seems we get an
	 * interrupt somewhere during the power cycle, since
	 * hw_unavailable is already set it doesn't get ACKed, we get
	 * into an interrupt loop and the the PMU decides to turn us
	 * off. */
	disable_irq(dev->irq);

	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(card->mdev), 0, 0);
	ssleep(1);
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(card->mdev), 0, 1);
	ssleep(1);

	enable_irq(dev->irq);
	ssleep(1);
#endif

	return 0;
}

static int
airport_attach(struct macio_dev *mdev, const struct of_match *match)
{
	struct orinoco_private *priv;
	struct net_device *dev;
	struct airport *card;
	unsigned long phys_addr;
	hermes_t *hw;

	if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
		printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
		return -ENODEV;
	}

	/* Allocate space for private device-specific data */
	dev = alloc_orinocodev(sizeof(*card), airport_hard_reset);
	if (! dev) {
		printk(KERN_ERR PFX "Cannot allocate network device\n");
		return -ENODEV;
	}
	priv = netdev_priv(dev);
	card = priv->card;

	hw = &priv->hw;
	card->mdev = mdev;

	if (macio_request_resource(mdev, 0, "airport")) {
		printk(KERN_ERR PFX "can't request IO resource !\n");
		free_orinocodev(dev);
		return -EBUSY;
	}

	SET_MODULE_OWNER(dev);
	SET_NETDEV_DEV(dev, &mdev->ofdev.dev);

	macio_set_drvdata(mdev, dev);

	/* Setup interrupts & base address */
	dev->irq = macio_irq(mdev, 0);
	phys_addr = macio_resource_start(mdev, 0);  /* Physical address */
	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
	dev->base_addr = phys_addr;
	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
	if (!card->vaddr) {
		printk(KERN_ERR PFX "ioremap() failed\n");
		goto failed;
	}

	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);
		
	/* Power up card */
	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 1);
	ssleep(1);

	/* Reset it before we get the interrupt */
	hermes_init(hw);

	if (request_irq(dev->irq, orinoco_interrupt, 0, dev->name, dev)) {
		printk(KERN_ERR PFX "Couldn't get IRQ %d\n", dev->irq);
		goto failed;
	}
	card->irq_requested = 1;

	/* Tell the stack we exist */
	if (register_netdev(dev) != 0) {
		printk(KERN_ERR PFX "register_netdev() failed\n");
		goto failed;
	}
	printk(KERN_DEBUG PFX "Card registered for interface %s\n", dev->name);
	card->ndev_registered = 1;
	return 0;
 failed:
	airport_detach(mdev);
	return -ENODEV;
}				/* airport_attach */


static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
MODULE_LICENSE("Dual MPL/GPL");

static struct of_match airport_match[] = 
{
	{
	.name 		= "radio",
	.type		= OF_ANY_MATCH,
	.compatible	= OF_ANY_MATCH
	},
	{},
};

static struct macio_driver airport_driver = 
{
	.name 		= DRIVER_NAME,
	.match_table	= airport_match,
	.probe		= airport_attach,
	.remove		= airport_detach,
	.suspend	= airport_suspend,
	.resume		= airport_resume,
};

static int __init
init_airport(void)
{
	printk(KERN_DEBUG "%s\n", version);

	return macio_register_driver(&airport_driver);
}

static void __exit
exit_airport(void)
{
	return macio_unregister_driver(&airport_driver);
}

module_init(init_airport);
module_exit(exit_airport);