summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/hostap/hostap_pci.c
blob: c4f6020baa9ee7d12bde7e27ab3aebac4bc9f842 (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
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
#define PRISM2_PCI

/* Host AP driver's support for Intersil Prism2.5 PCI cards is based on
 * driver patches from Reyk Floeter <reyk@vantronix.net> and
 * Andy Warner <andyw@pobox.com> */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/if.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/workqueue.h>
#include <linux/wireless.h>
#include <net/iw_handler.h>

#include <linux/ioport.h>
#include <linux/pci.h>
#include <asm/io.h>

#include "hostap_wlan.h"


static char *version = PRISM2_VERSION " (Jouni Malinen <jkmaline@cc.hut.fi>)";
static char *dev_info = "hostap_pci";


MODULE_AUTHOR("Jouni Malinen");
MODULE_DESCRIPTION("Support for Intersil Prism2.5-based 802.11 wireless LAN "
		   "PCI cards.");
MODULE_SUPPORTED_DEVICE("Intersil Prism2.5-based WLAN PCI cards");
MODULE_LICENSE("GPL");
MODULE_VERSION(PRISM2_VERSION);


/* struct local_info::hw_priv */
struct hostap_pci_priv {
	void __iomem *mem_start;
};


/* FIX: do we need mb/wmb/rmb with memory operations? */


static struct pci_device_id prism2_pci_id_table[] __devinitdata = {
	/* Intersil Prism3 ISL3872 11Mb/s WLAN Controller */
	{ 0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID },
	/* Intersil Prism2.5 ISL3874 11Mb/s WLAN Controller */
	{ 0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID },
	/* Samsung MagicLAN SWL-2210P */
	{ 0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID },
	{ 0 }
};


#ifdef PRISM2_IO_DEBUG

static inline void hfa384x_outb_debug(struct net_device *dev, int a, u8 v)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	local_info_t *local;
	unsigned long flags;

	iface = netdev_priv(dev);
	local = iface->local;
	hw_priv = local->hw_priv;

	spin_lock_irqsave(&local->lock, flags);
	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTB, a, v);
	writeb(v, hw_priv->mem_start + a);
	spin_unlock_irqrestore(&local->lock, flags);
}

static inline u8 hfa384x_inb_debug(struct net_device *dev, int a)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	local_info_t *local;
	unsigned long flags;
	u8 v;

	iface = netdev_priv(dev);
	local = iface->local;
	hw_priv = local->hw_priv;

	spin_lock_irqsave(&local->lock, flags);
	v = readb(hw_priv->mem_start + a);
	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INB, a, v);
	spin_unlock_irqrestore(&local->lock, flags);
	return v;
}

static inline void hfa384x_outw_debug(struct net_device *dev, int a, u16 v)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	local_info_t *local;
	unsigned long flags;

	iface = netdev_priv(dev);
	local = iface->local;
	hw_priv = local->hw_priv;

	spin_lock_irqsave(&local->lock, flags);
	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_OUTW, a, v);
	writew(v, hw_priv->mem_start + a);
	spin_unlock_irqrestore(&local->lock, flags);
}

static inline u16 hfa384x_inw_debug(struct net_device *dev, int a)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	local_info_t *local;
	unsigned long flags;
	u16 v;

	iface = netdev_priv(dev);
	local = iface->local;
	hw_priv = local->hw_priv;

	spin_lock_irqsave(&local->lock, flags);
	v = readw(hw_priv->mem_start + a);
	prism2_io_debug_add(dev, PRISM2_IO_DEBUG_CMD_INW, a, v);
	spin_unlock_irqrestore(&local->lock, flags);
	return v;
}

#define HFA384X_OUTB(v,a) hfa384x_outb_debug(dev, (a), (v))
#define HFA384X_INB(a) hfa384x_inb_debug(dev, (a))
#define HFA384X_OUTW(v,a) hfa384x_outw_debug(dev, (a), (v))
#define HFA384X_INW(a) hfa384x_inw_debug(dev, (a))
#define HFA384X_OUTW_DATA(v,a) hfa384x_outw_debug(dev, (a), cpu_to_le16((v)))
#define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw_debug(dev, (a)))

#else /* PRISM2_IO_DEBUG */

static inline void hfa384x_outb(struct net_device *dev, int a, u8 v)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	iface = netdev_priv(dev);
	hw_priv = iface->local->hw_priv;
	writeb(v, hw_priv->mem_start + a);
}

static inline u8 hfa384x_inb(struct net_device *dev, int a)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	iface = netdev_priv(dev);
	hw_priv = iface->local->hw_priv;
	return readb(hw_priv->mem_start + a);
}

static inline void hfa384x_outw(struct net_device *dev, int a, u16 v)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	iface = netdev_priv(dev);
	hw_priv = iface->local->hw_priv;
	writew(v, hw_priv->mem_start + a);
}

static inline u16 hfa384x_inw(struct net_device *dev, int a)
{
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;
	iface = netdev_priv(dev);
	hw_priv = iface->local->hw_priv;
	return readw(hw_priv->mem_start + a);
}

#define HFA384X_OUTB(v,a) hfa384x_outb(dev, (a), (v))
#define HFA384X_INB(a) hfa384x_inb(dev, (a))
#define HFA384X_OUTW(v,a) hfa384x_outw(dev, (a), (v))
#define HFA384X_INW(a) hfa384x_inw(dev, (a))
#define HFA384X_OUTW_DATA(v,a) hfa384x_outw(dev, (a), cpu_to_le16((v)))
#define HFA384X_INW_DATA(a) (u16) le16_to_cpu(hfa384x_inw(dev, (a)))

#endif /* PRISM2_IO_DEBUG */


static int hfa384x_from_bap(struct net_device *dev, u16 bap, void *buf,
			    int len)
{
	u16 d_off;
	u16 *pos;

	d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
	pos = (u16 *) buf;

	for ( ; len > 1; len -= 2)
		*pos++ = HFA384X_INW_DATA(d_off);

	if (len & 1)
		*((char *) pos) = HFA384X_INB(d_off);

	return 0;
}


static int hfa384x_to_bap(struct net_device *dev, u16 bap, void *buf, int len)
{
	u16 d_off;
	u16 *pos;

	d_off = (bap == 1) ? HFA384X_DATA1_OFF : HFA384X_DATA0_OFF;
	pos = (u16 *) buf;

	for ( ; len > 1; len -= 2)
		HFA384X_OUTW_DATA(*pos++, d_off);

	if (len & 1)
		HFA384X_OUTB(*((char *) pos), d_off);

	return 0;
}


/* FIX: This might change at some point.. */
#include "hostap_hw.c"

static void prism2_pci_cor_sreset(local_info_t *local)
{
	struct net_device *dev = local->dev;
	u16 reg;

	reg = HFA384X_INB(HFA384X_PCICOR_OFF);
	printk(KERN_DEBUG "%s: Original COR value: 0x%0x\n", dev->name, reg);

	/* linux-wlan-ng uses extremely long hold and settle times for
	 * COR sreset. A comment in the driver code mentions that the long
	 * delays appear to be necessary. However, at least IBM 22P6901 seems
	 * to work fine with shorter delays.
	 *
	 * Longer delays can be configured by uncommenting following line: */
/* #define PRISM2_PCI_USE_LONG_DELAYS */

#ifdef PRISM2_PCI_USE_LONG_DELAYS
	int i;

	HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
	mdelay(250);

	HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
	mdelay(500);

	/* Wait for f/w to complete initialization (CMD:BUSY == 0) */
	i = 2000000 / 10;
	while ((HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) && --i)
		udelay(10);

#else /* PRISM2_PCI_USE_LONG_DELAYS */

	HFA384X_OUTW(reg | 0x0080, HFA384X_PCICOR_OFF);
	mdelay(2);
	HFA384X_OUTW(reg & ~0x0080, HFA384X_PCICOR_OFF);
	mdelay(2);

#endif /* PRISM2_PCI_USE_LONG_DELAYS */

	if (HFA384X_INW(HFA384X_CMD_OFF) & HFA384X_CMD_BUSY) {
		printk(KERN_DEBUG "%s: COR sreset timeout\n", dev->name);
	}
}


static void prism2_pci_genesis_reset(local_info_t *local, int hcr)
{
	struct net_device *dev = local->dev;

	HFA384X_OUTW(0x00C5, HFA384X_PCICOR_OFF);
	mdelay(10);
	HFA384X_OUTW(hcr, HFA384X_PCIHCR_OFF);
	mdelay(10);
	HFA384X_OUTW(0x0045, HFA384X_PCICOR_OFF);
	mdelay(10);
}


static struct prism2_helper_functions prism2_pci_funcs =
{
	.card_present	= NULL,
	.cor_sreset	= prism2_pci_cor_sreset,
	.genesis_reset	= prism2_pci_genesis_reset,
	.hw_type	= HOSTAP_HW_PCI,
};


static int prism2_pci_probe(struct pci_dev *pdev,
			    const struct pci_device_id *id)
{
	unsigned long phymem;
	void __iomem *mem = NULL;
	local_info_t *local = NULL;
	struct net_device *dev = NULL;
	static int cards_found /* = 0 */;
	int irq_registered = 0;
	struct hostap_interface *iface;
	struct hostap_pci_priv *hw_priv;

	hw_priv = kzalloc(sizeof(*hw_priv), GFP_KERNEL);
	if (hw_priv == NULL)
		return -ENOMEM;

	if (pci_enable_device(pdev))
		goto err_out_free;

	phymem = pci_resource_start(pdev, 0);

	if (!request_mem_region(phymem, pci_resource_len(pdev, 0), "Prism2")) {
		printk(KERN_ERR "prism2: Cannot reserve PCI memory region\n");
		goto err_out_disable;
	}

	mem = ioremap(phymem, pci_resource_len(pdev, 0));
	if (mem == NULL) {
		printk(KERN_ERR "prism2: Cannot remap PCI memory region\n") ;
		goto fail;
	}

	dev = prism2_init_local_data(&prism2_pci_funcs, cards_found,
				     &pdev->dev);
	if (dev == NULL)
		goto fail;
	iface = netdev_priv(dev);
	local = iface->local;
	local->hw_priv = hw_priv;
	cards_found++;

        dev->irq = pdev->irq;
        hw_priv->mem_start = mem;

	prism2_pci_cor_sreset(local);

	pci_set_drvdata(pdev, dev);

	if (request_irq(dev->irq, prism2_interrupt, IRQF_SHARED, dev->name,
			dev)) {
		printk(KERN_WARNING "%s: request_irq failed\n", dev->name);
		goto fail;
	} else
		irq_registered = 1;

	if (!local->pri_only && prism2_hw_config(dev, 1)) {
		printk(KERN_DEBUG "%s: hardware initialization failed\n",
		       dev_info);
		goto fail;
	}

	printk(KERN_INFO "%s: Intersil Prism2.5 PCI: "
	       "mem=0x%lx, irq=%d\n", dev->name, phymem, dev->irq);

	return hostap_hw_ready(dev);

 fail:
	if (irq_registered && dev)
		free_irq(dev->irq, dev);

	if (mem)
		iounmap(mem);

	release_mem_region(phymem, pci_resource_len(pdev, 0));

 err_out_disable:
	pci_disable_device(pdev);
	prism2_free_local_data(dev);

 err_out_free:
	kfree(hw_priv);

	return -ENODEV;
}


static void prism2_pci_remove(struct pci_dev *pdev)
{
	struct net_device *dev;
	struct hostap_interface *iface;
	void __iomem *mem_start;
	struct hostap_pci_priv *hw_priv;

	dev = pci_get_drvdata(pdev);
	iface = netdev_priv(dev);
	hw_priv = iface->local->hw_priv;

	/* Reset the hardware, and ensure interrupts are disabled. */
	prism2_pci_cor_sreset(iface->local);
	hfa384x_disable_interrupts(dev);

	if (dev->irq)
		free_irq(dev->irq, dev);

	mem_start = hw_priv->mem_start;
	prism2_free_local_data(dev);
	kfree(hw_priv);

	iounmap(mem_start);

	release_mem_region(pci_resource_start(pdev, 0),
			   pci_resource_len(pdev, 0));
	pci_disable_device(pdev);
}


#ifdef CONFIG_PM
static int prism2_pci_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *dev = pci_get_drvdata(pdev);

	if (netif_running(dev)) {
		netif_stop_queue(dev);
		netif_device_detach(dev);
	}
	prism2_suspend(dev);
	pci_save_state(pdev);
	pci_disable_device(pdev);
	pci_set_power_state(pdev, PCI_D3hot);

	return 0;
}

static int prism2_pci_resume(struct pci_dev *pdev)
{
	struct net_device *dev = pci_get_drvdata(pdev);
	int err;

	err = pci_enable_device(pdev);
	if (err) {
		printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
		       dev->name);
		return err;
	}
	pci_restore_state(pdev);
	prism2_hw_config(dev, 0);
	if (netif_running(dev)) {
		netif_device_attach(dev);
		netif_start_queue(dev);
	}

	return 0;
}
#endif /* CONFIG_PM */


MODULE_DEVICE_TABLE(pci, prism2_pci_id_table);

static struct pci_driver prism2_pci_drv_id = {
	.name		= "hostap_pci",
	.id_table	= prism2_pci_id_table,
	.probe		= prism2_pci_probe,
	.remove		= prism2_pci_remove,
#ifdef CONFIG_PM
	.suspend	= prism2_pci_suspend,
	.resume		= prism2_pci_resume,
#endif /* CONFIG_PM */
	/* Linux 2.4.6 added save_state and enable_wake that are not used here
	 */
};


static int __init init_prism2_pci(void)
{
	printk(KERN_INFO "%s: %s\n", dev_info, version);

	return pci_register_driver(&prism2_pci_drv_id);
}


static void __exit exit_prism2_pci(void)
{
	pci_unregister_driver(&prism2_pci_drv_id);
	printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
}


module_init(init_prism2_pci);
module_exit(exit_prism2_pci);