1/* orinoco_nortel.c
2 *
3 * Driver for Prism II devices which would usually be driven by orinoco_cs,
4 * but are connected to the PCI bus by a PCI-to-PCMCIA adapter used in
5 * Nortel emobility, Symbol LA-4113 and Symbol LA-4123.
6 *
7 * Copyright (C) 2002 Tobias Hoffmann
8 *           (C) 2003 Christoph Jungegger <disdos@traum404.de>
9 *
10 * Some of this code is borrowed from orinoco_plx.c
11 *	Copyright (C) 2001 Daniel Barlow
12 * Some of this code is borrowed from orinoco_pci.c
13 *  Copyright (C) 2001 Jean Tourrilhes
14 * Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
15 * has been copied from it. linux-wlan-ng-0.1.10 is originally :
16 *	Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
17 *
18 * The contents of this file are subject to the Mozilla Public License
19 * Version 1.1 (the "License"); you may not use this file except in
20 * compliance with the License. You may obtain a copy of the License
21 * at http://www.mozilla.org/MPL/
22 *
23 * Software distributed under the License is distributed on an "AS IS"
24 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
25 * the License for the specific language governing rights and
26 * limitations under the License.
27 *
28 * Alternatively, the contents of this file may be used under the
29 * terms of the GNU General Public License version 2 (the "GPL"), in
30 * which case the provisions of the GPL are applicable instead of the
31 * above.  If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the MPL, indicate your decision by
34 * deleting the provisions above and replace them with the notice and
35 * other provisions required by the GPL.  If you do not delete the
36 * provisions above, a recipient may use your version of this file
37 * under either the MPL or the GPL.
38 */
39
40#define DRIVER_NAME "orinoco_nortel"
41#define PFX DRIVER_NAME ": "
42
43#include <linux/module.h>
44#include <linux/kernel.h>
45#include <linux/init.h>
46#include <linux/delay.h>
47#include <linux/pci.h>
48#include <pcmcia/cisreg.h>
49
50#include "orinoco.h"
51#include "orinoco_pci.h"
52
53#define COR_OFFSET    (0xe0)	/* COR attribute offset of Prism2 PC card */
54#define COR_VALUE     (COR_LEVEL_REQ | COR_FUNC_ENA)	/* Enable PC card with interrupt in level trigger */
55
56
57/*
58 * Do a soft reset of the card using the Configuration Option Register
59 * We need this to get going...
60 * This is the part of the code that is strongly inspired from wlan-ng
61 *
62 * Note bis : Don't try to access HERMES_CMD during the reset phase.
63 * It just won't work !
64 */
65static int orinoco_nortel_cor_reset(struct orinoco_private *priv)
66{
67	struct orinoco_pci_card *card = priv->card;
68
69	/* Assert the reset until the card notices */
70	iowrite16(8, card->bridge_io + 2);
71	ioread16(card->attr_io + COR_OFFSET);
72	iowrite16(0x80, card->attr_io + COR_OFFSET);
73	mdelay(1);
74
75	/* Give time for the card to recover from this hard effort */
76	iowrite16(0, card->attr_io + COR_OFFSET);
77	iowrite16(0, card->attr_io + COR_OFFSET);
78	mdelay(1);
79
80	/* Set COR as usual */
81	iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
82	iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
83	mdelay(1);
84
85	iowrite16(0x228, card->bridge_io + 2);
86
87	return 0;
88}
89
90static int orinoco_nortel_hw_init(struct orinoco_pci_card *card)
91{
92	int i;
93	u32 reg;
94
95	/* Setup bridge */
96	if (ioread16(card->bridge_io) & 1) {
97		printk(KERN_ERR PFX "brg1 answer1 wrong\n");
98		return -EBUSY;
99	}
100	iowrite16(0x118, card->bridge_io + 2);
101	iowrite16(0x108, card->bridge_io + 2);
102	mdelay(30);
103	iowrite16(0x8, card->bridge_io + 2);
104	for (i = 0; i < 30; i++) {
105		mdelay(30);
106		if (ioread16(card->bridge_io) & 0x10) {
107			break;
108		}
109	}
110	if (i == 30) {
111		printk(KERN_ERR PFX "brg1 timed out\n");
112		return -EBUSY;
113	}
114	if (ioread16(card->attr_io + COR_OFFSET) & 1) {
115		printk(KERN_ERR PFX "brg2 answer1 wrong\n");
116		return -EBUSY;
117	}
118	if (ioread16(card->attr_io + COR_OFFSET + 2) & 1) {
119		printk(KERN_ERR PFX "brg2 answer2 wrong\n");
120		return -EBUSY;
121	}
122	if (ioread16(card->attr_io + COR_OFFSET + 4) & 1) {
123		printk(KERN_ERR PFX "brg2 answer3 wrong\n");
124		return -EBUSY;
125	}
126
127	/* Set the PCMCIA COR register */
128	iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
129	mdelay(1);
130	reg = ioread16(card->attr_io + COR_OFFSET);
131	if (reg != COR_VALUE) {
132		printk(KERN_ERR PFX "Error setting COR value (reg=%x)\n",
133		       reg);
134		return -EBUSY;
135	}
136
137	/* Set LEDs */
138	iowrite16(1, card->bridge_io + 10);
139	return 0;
140}
141
142static int orinoco_nortel_init_one(struct pci_dev *pdev,
143				   const struct pci_device_id *ent)
144{
145	int err;
146	struct orinoco_private *priv;
147	struct orinoco_pci_card *card;
148	struct net_device *dev;
149	void __iomem *hermes_io, *bridge_io, *attr_io;
150
151	err = pci_enable_device(pdev);
152	if (err) {
153		printk(KERN_ERR PFX "Cannot enable PCI device\n");
154		return err;
155	}
156
157	err = pci_request_regions(pdev, DRIVER_NAME);
158	if (err) {
159		printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
160		goto fail_resources;
161	}
162
163	bridge_io = pci_iomap(pdev, 0, 0);
164	if (!bridge_io) {
165		printk(KERN_ERR PFX "Cannot map bridge registers\n");
166		err = -EIO;
167		goto fail_map_bridge;
168	}
169
170	attr_io = pci_iomap(pdev, 1, 0);
171	if (!attr_io) {
172		printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n");
173		err = -EIO;
174		goto fail_map_attr;
175	}
176
177	hermes_io = pci_iomap(pdev, 2, 0);
178	if (!hermes_io) {
179		printk(KERN_ERR PFX "Cannot map chipset registers\n");
180		err = -EIO;
181		goto fail_map_hermes;
182	}
183
184	/* Allocate network device */
185	dev = alloc_orinocodev(sizeof(*card), orinoco_nortel_cor_reset);
186	if (!dev) {
187		printk(KERN_ERR PFX "Cannot allocate network device\n");
188		err = -ENOMEM;
189		goto fail_alloc;
190	}
191
192	priv = netdev_priv(dev);
193	card = priv->card;
194	card->bridge_io = bridge_io;
195	card->attr_io = attr_io;
196	SET_MODULE_OWNER(dev);
197	SET_NETDEV_DEV(dev, &pdev->dev);
198
199	hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
200
201	err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
202			  dev->name, dev);
203	if (err) {
204		printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
205		err = -EBUSY;
206		goto fail_irq;
207	}
208
209	err = orinoco_nortel_hw_init(card);
210	if (err) {
211		printk(KERN_ERR PFX "Hardware initialization failed\n");
212		goto fail;
213	}
214
215	err = orinoco_nortel_cor_reset(priv);
216	if (err) {
217		printk(KERN_ERR PFX "Initial reset failed\n");
218		goto fail;
219	}
220
221	err = register_netdev(dev);
222	if (err) {
223		printk(KERN_ERR PFX "Cannot register network device\n");
224		goto fail;
225	}
226
227	pci_set_drvdata(pdev, dev);
228	printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
229	       pci_name(pdev));
230
231	return 0;
232
233 fail:
234	free_irq(pdev->irq, dev);
235
236 fail_irq:
237	pci_set_drvdata(pdev, NULL);
238	free_orinocodev(dev);
239
240 fail_alloc:
241	pci_iounmap(pdev, hermes_io);
242
243 fail_map_hermes:
244	pci_iounmap(pdev, attr_io);
245
246 fail_map_attr:
247	pci_iounmap(pdev, bridge_io);
248
249 fail_map_bridge:
250	pci_release_regions(pdev);
251
252 fail_resources:
253	pci_disable_device(pdev);
254
255	return err;
256}
257
258static void __devexit orinoco_nortel_remove_one(struct pci_dev *pdev)
259{
260	struct net_device *dev = pci_get_drvdata(pdev);
261	struct orinoco_private *priv = netdev_priv(dev);
262	struct orinoco_pci_card *card = priv->card;
263
264	/* Clear LEDs */
265	iowrite16(0, card->bridge_io + 10);
266
267	unregister_netdev(dev);
268	free_irq(pdev->irq, dev);
269	pci_set_drvdata(pdev, NULL);
270	free_orinocodev(dev);
271	pci_iounmap(pdev, priv->hw.iobase);
272	pci_iounmap(pdev, card->attr_io);
273	pci_iounmap(pdev, card->bridge_io);
274	pci_release_regions(pdev);
275	pci_disable_device(pdev);
276}
277
278static struct pci_device_id orinoco_nortel_id_table[] = {
279	/* Nortel emobility PCI */
280	{0x126c, 0x8030, PCI_ANY_ID, PCI_ANY_ID,},
281	/* Symbol LA-4123 PCI */
282	{0x1562, 0x0001, PCI_ANY_ID, PCI_ANY_ID,},
283	{0,},
284};
285
286MODULE_DEVICE_TABLE(pci, orinoco_nortel_id_table);
287
288static struct pci_driver orinoco_nortel_driver = {
289	.name		= DRIVER_NAME,
290	.id_table	= orinoco_nortel_id_table,
291	.probe		= orinoco_nortel_init_one,
292	.remove		= __devexit_p(orinoco_nortel_remove_one),
293	.suspend	= orinoco_pci_suspend,
294	.resume		= orinoco_pci_resume,
295};
296
297static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
298	" (Tobias Hoffmann & Christoph Jungegger <disdos@traum404.de>)";
299MODULE_AUTHOR("Christoph Jungegger <disdos@traum404.de>");
300MODULE_DESCRIPTION
301    ("Driver for wireless LAN cards using the Nortel PCI bridge");
302MODULE_LICENSE("Dual MPL/GPL");
303
304static int __init orinoco_nortel_init(void)
305{
306	printk(KERN_DEBUG "%s\n", version);
307	return pci_register_driver(&orinoco_nortel_driver);
308}
309
310static void __exit orinoco_nortel_exit(void)
311{
312	pci_unregister_driver(&orinoco_nortel_driver);
313}
314
315module_init(orinoco_nortel_init);
316module_exit(orinoco_nortel_exit);
317
318/*
319 * Local variables:
320 *  c-indent-level: 8
321 *  c-basic-offset: 8
322 *  tab-width: 8
323 * End:
324 */
325