summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/prism54/islpci_hotplug.c
blob: bfa0cc319a098717ed6f7712e2ed35ccabed07eb (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
/*
 *  
 *  Copyright (C) 2002 Intersil Americas Inc.
 *  Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/init.h> /* For __init, __exit */
#include <linux/dma-mapping.h>

#include "prismcompat.h"
#include "islpci_dev.h"
#include "islpci_mgt.h"		/* for pc_debug */
#include "isl_oid.h"

#define DRV_NAME	"prism54"
#define DRV_VERSION	"1.2"

MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Development Team <prism54-devel@prism54.org>");
MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
MODULE_LICENSE("GPL");

static int	init_pcitm = 0;
module_param(init_pcitm, int, 0);

/* In this order: vendor, device, subvendor, subdevice, class, class_mask,
 * driver_data 
 * If you have an update for this please contact prism54-devel@prism54.org 
 * The latest list can be found at http://prism54.org/supported_cards.php */
static const struct pci_device_id prism54_id_tbl[] = {
	/* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
	{
	 0x1260, 0x3890,
	 PCI_ANY_ID, PCI_ANY_ID,
	 0, 0, 0
	},

	/* 3COM 3CRWE154G72 Wireless LAN adapter */
	{
	 0x10b7, 0x6001,
	 PCI_ANY_ID, PCI_ANY_ID,
	 0, 0, 0
	},

	/* Intersil PRISM Indigo Wireless LAN adapter */
	{
	 0x1260, 0x3877,
	 PCI_ANY_ID, PCI_ANY_ID,
	 0, 0, 0
	},

	/* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
	{
	 0x1260, 0x3886,
	 PCI_ANY_ID, PCI_ANY_ID,
	 0, 0, 0
	},

	/* End of list */
	{0,0,0,0,0,0,0}
};

/* register the device with the Hotplug facilities of the kernel */
MODULE_DEVICE_TABLE(pci, prism54_id_tbl);

static int prism54_probe(struct pci_dev *, const struct pci_device_id *);
static void prism54_remove(struct pci_dev *);
static int prism54_suspend(struct pci_dev *, pm_message_t state);
static int prism54_resume(struct pci_dev *);

static struct pci_driver prism54_driver = {
	.name = DRV_NAME,
	.id_table = prism54_id_tbl,
	.probe = prism54_probe,
	.remove = prism54_remove,
	.suspend = prism54_suspend,
	.resume = prism54_resume,
	/* .enable_wake ; we don't support this yet */
};

/******************************************************************************
    Module initialization functions
******************************************************************************/

int
prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct net_device *ndev;
	u8 latency_tmr;
	u32 mem_addr;
	islpci_private *priv;
	int rvalue;

	/* Enable the pci device */
	if (pci_enable_device(pdev)) {
		printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME);
		return -ENODEV;
	}

	/* check whether the latency timer is set correctly */
	pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr);
#if VERBOSE > SHOW_ERROR_MESSAGES
	DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr);
#endif
	if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) {
		/* set the latency timer */
		pci_write_config_byte(pdev, PCI_LATENCY_TIMER,
				      PCIDEVICE_LATENCY_TIMER_VAL);
	}

	/* enable PCI DMA */
	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
		printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME);
		goto do_pci_disable_device;
        }

	/* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT)
	 * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT)
	 * 	The RETRY_TIMEOUT is used to set the number of retries that the core, as a
	 * 	Master, will perform before abandoning a cycle. The default value for
	 * 	RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new
	 * 	devices. A write of zero to the RETRY_TIMEOUT register disables this
	 * 	function to allow use with any non-compliant legacy devices that may
	 * 	execute more retries.
	 *
	 * 	Writing zero to both these two registers will disable both timeouts and
	 * 	*can* solve problems caused by devices that are slow to respond.
	 *	Make this configurable - MSW
	 */
	if ( init_pcitm >= 0 ) {
		pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
		pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
	} else {
		printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
	}

	/* request the pci device I/O regions */
	rvalue = pci_request_regions(pdev, DRV_NAME);
	if (rvalue) {
		printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n",
		       DRV_NAME, rvalue);
		goto do_pci_disable_device;
	}

	/* check if the memory window is indeed set */
	rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr);
	if (rvalue || !mem_addr) {
		printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n",
		       DRV_NAME);
		goto do_pci_release_regions;
	}

	/* enable PCI bus-mastering */
	DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
	pci_set_master(pdev);

	/* enable MWI */
	pci_set_mwi(pdev);

	/* setup the network device interface and its structure */
	if (!(ndev = islpci_setup(pdev))) {
		/* error configuring the driver as a network device */
		printk(KERN_ERR "%s: could not configure network device\n",
		       DRV_NAME);
		goto do_pci_release_regions;
	}

	priv = netdev_priv(ndev);
	islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */

	/* card is in unknown state yet, might have some interrupts pending */
	isl38xx_disable_interrupts(priv->device_base);

	/* request for the interrupt before uploading the firmware */
	rvalue = request_irq(pdev->irq, &islpci_interrupt,
			     SA_SHIRQ, ndev->name, priv);

	if (rvalue) {
		/* error, could not hook the handler to the irq */
		printk(KERN_ERR "%s: could not install IRQ handler\n",
		       ndev->name);
		goto do_unregister_netdev;
	}

	/* firmware upload is triggered in islpci_open */

	return 0;

      do_unregister_netdev:
	unregister_netdev(ndev);
	islpci_free_memory(priv);
	pci_set_drvdata(pdev, NULL);
	free_netdev(ndev);
	priv = NULL;
      do_pci_release_regions:
	pci_release_regions(pdev);
      do_pci_disable_device:
	pci_disable_device(pdev);
	return -EIO;
}

/* set by cleanup_module */
static volatile int __in_cleanup_module = 0;

/* this one removes one(!!) instance only */
void
prism54_remove(struct pci_dev *pdev)
{
	struct net_device *ndev = pci_get_drvdata(pdev);
	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
	BUG_ON(!priv);

	if (!__in_cleanup_module) {
		printk(KERN_DEBUG "%s: hot unplug detected\n", ndev->name);
		islpci_set_state(priv, PRV_STATE_OFF);
	}

	printk(KERN_DEBUG "%s: removing device\n", ndev->name);

	unregister_netdev(ndev);

	/* free the interrupt request */

	if (islpci_get_state(priv) != PRV_STATE_OFF) {
		isl38xx_disable_interrupts(priv->device_base);
		islpci_set_state(priv, PRV_STATE_OFF);
		/* This bellow causes a lockup at rmmod time. It might be
		 * because some interrupts still linger after rmmod time, 
		 * see bug #17 */
		/* pci_set_power_state(pdev, 3);*/	/* try to power-off */
	}

	free_irq(pdev->irq, priv);

	/* free the PCI memory and unmap the remapped page */
	islpci_free_memory(priv);

	pci_set_drvdata(pdev, NULL);
	free_netdev(ndev);
	priv = NULL;

	pci_release_regions(pdev);

	pci_disable_device(pdev);
}

int
prism54_suspend(struct pci_dev *pdev, pm_message_t state)
{
	struct net_device *ndev = pci_get_drvdata(pdev);
	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
	BUG_ON(!priv);


	pci_save_state(pdev);

	/* tell the device not to trigger interrupts for now... */
	isl38xx_disable_interrupts(priv->device_base);

	/* from now on assume the hardware was already powered down
	   and don't touch it anymore */
	islpci_set_state(priv, PRV_STATE_OFF);

	netif_stop_queue(ndev);
	netif_device_detach(ndev);

	return 0;
}

int
prism54_resume(struct pci_dev *pdev)
{
	struct net_device *ndev = pci_get_drvdata(pdev);
	islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
	BUG_ON(!priv);

	pci_enable_device(pdev);

	printk(KERN_NOTICE "%s: got resume request\n", ndev->name);

	pci_restore_state(pdev);

	/* alright let's go into the PREBOOT state */
	islpci_reset(priv, 1);

	netif_device_attach(ndev);
	netif_start_queue(ndev);

	return 0;
}

static int __init
prism54_module_init(void)
{
	printk(KERN_INFO "Loaded %s driver, version %s\n",
	       DRV_NAME, DRV_VERSION);

	__bug_on_wrong_struct_sizes ();

	return pci_module_init(&prism54_driver);
}

/* by the time prism54_module_exit() terminates, as a postcondition
 * all instances will have been destroyed by calls to
 * prism54_remove() */
static void __exit
prism54_module_exit(void)
{
	__in_cleanup_module = 1;

	pci_unregister_driver(&prism54_driver);

	printk(KERN_INFO "Unloaded %s driver\n", DRV_NAME);

	__in_cleanup_module = 0;
}

/* register entry points */
module_init(prism54_module_init);
module_exit(prism54_module_exit);
/* EOF */