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
27struct airport {
28	struct macio_dev *mdev;
29	void __iomem *vaddr;
30	int irq_requested;
31	int ndev_registered;
32};
33
34static int
35airport_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
68static int
69airport_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
109static int
110airport_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
139static 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
146	return 0;
147}
148
149static int
150airport_attach(struct macio_dev *mdev, const struct of_device_id *match)
151{
152	struct orinoco_private *priv;
153	struct net_device *dev;
154	struct airport *card;
155	unsigned long phys_addr;
156	hermes_t *hw;
157
158	if (macio_resource_count(mdev) < 1 || macio_irq_count(mdev) < 1) {
159		printk(KERN_ERR PFX "Wrong interrupt/addresses in OF tree\n");
160		return -ENODEV;
161	}
162
163	/* Allocate space for private device-specific data */
164	dev = alloc_orinocodev(sizeof(*card), airport_hard_reset);
165	if (! dev) {
166		printk(KERN_ERR PFX "Cannot allocate network device\n");
167		return -ENODEV;
168	}
169	priv = netdev_priv(dev);
170	card = priv->card;
171
172	hw = &priv->hw;
173	card->mdev = mdev;
174
175	if (macio_request_resource(mdev, 0, "airport")) {
176		printk(KERN_ERR PFX "can't request IO resource !\n");
177		free_orinocodev(dev);
178		return -EBUSY;
179	}
180
181	SET_MODULE_OWNER(dev);
182	SET_NETDEV_DEV(dev, &mdev->ofdev.dev);
183
184	macio_set_drvdata(mdev, dev);
185
186	/* Setup interrupts & base address */
187	dev->irq = macio_irq(mdev, 0);
188	phys_addr = macio_resource_start(mdev, 0);  /* Physical address */
189	printk(KERN_DEBUG PFX "Physical address %lx\n", phys_addr);
190	dev->base_addr = phys_addr;
191	card->vaddr = ioremap(phys_addr, AIRPORT_IO_LEN);
192	if (!card->vaddr) {
193		printk(KERN_ERR PFX "ioremap() failed\n");
194		goto failed;
195	}
196
197	hermes_struct_init(hw, card->vaddr, HERMES_16BIT_REGSPACING);
198
199	/* Power up card */
200	pmac_call_feature(PMAC_FTR_AIRPORT_ENABLE, macio_get_of_node(mdev), 0, 1);
201	ssleep(1);
202
203	/* Reset it before we get the interrupt */
204	hermes_init(hw);
205
206	if (request_irq(dev->irq, orinoco_interrupt, 0, dev->name, dev)) {
207		printk(KERN_ERR PFX "Couldn't get IRQ %d\n", dev->irq);
208		goto failed;
209	}
210	card->irq_requested = 1;
211
212	/* Tell the stack we exist */
213	if (register_netdev(dev) != 0) {
214		printk(KERN_ERR PFX "register_netdev() failed\n");
215		goto failed;
216	}
217	printk(KERN_DEBUG PFX "Card registered for interface %s\n", dev->name);
218	card->ndev_registered = 1;
219	return 0;
220 failed:
221	airport_detach(mdev);
222	return -ENODEV;
223}				/* airport_attach */
224
225
226static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
227	" (Benjamin Herrenschmidt <benh@kernel.crashing.org>)";
228MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
229MODULE_DESCRIPTION("Driver for the Apple Airport wireless card.");
230MODULE_LICENSE("Dual MPL/GPL");
231
232static struct of_device_id airport_match[] =
233{
234	{
235	.name 		= "radio",
236	},
237	{},
238};
239
240MODULE_DEVICE_TABLE (of, airport_match);
241
242static struct macio_driver airport_driver =
243{
244	.name 		= DRIVER_NAME,
245	.match_table	= airport_match,
246	.probe		= airport_attach,
247	.remove		= airport_detach,
248	.suspend	= airport_suspend,
249	.resume		= airport_resume,
250};
251
252static int __init
253init_airport(void)
254{
255	printk(KERN_DEBUG "%s\n", version);
256
257	return macio_register_driver(&airport_driver);
258}
259
260static void __exit
261exit_airport(void)
262{
263	return macio_unregister_driver(&airport_driver);
264}
265
266module_init(init_airport);
267module_exit(exit_airport);
268