1 /* orinoco_pci.c
2 *
3 * Driver for Prism 2.5/3 devices that have a direct PCI interface
4 * (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
5 * The card contains only one PCI region, which contains all the usual
6 * hermes registers, as well as the COR register.
7 *
8 * Current maintainers are:
9 * Pavel Roskin <proski AT gnu.org>
10 * and David Gibson <hermes AT gibson.dropbear.id.au>
11 *
12 * Some of this code is borrowed from orinoco_plx.c
13 * Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
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 * This file originally written by:
18 * Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
19 * And is now maintained by:
20 * (C) Copyright David Gibson, IBM Corp. 2002-2003.
21 *
22 * The contents of this file are subject to the Mozilla Public License
23 * Version 1.1 (the "License"); you may not use this file except in
24 * compliance with the License. You may obtain a copy of the License
25 * at http://www.mozilla.org/MPL/
26 *
27 * Software distributed under the License is distributed on an "AS IS"
28 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
29 * the License for the specific language governing rights and
30 * limitations under the License.
31 *
32 * Alternatively, the contents of this file may be used under the
33 * terms of the GNU General Public License version 2 (the "GPL"), in
34 * which case the provisions of the GPL are applicable instead of the
35 * above. If you wish to allow the use of your version of this file
36 * only under the terms of the GPL and not to allow others to use your
37 * version of this file under the MPL, indicate your decision by
38 * deleting the provisions above and replace them with the notice and
39 * other provisions required by the GPL. If you do not delete the
40 * provisions above, a recipient may use your version of this file
41 * under either the MPL or the GPL.
42 */
43
44 #define DRIVER_NAME "orinoco_pci"
45 #define PFX DRIVER_NAME ": "
46
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/pci.h>
52
53 #include "orinoco.h"
54 #include "orinoco_pci.h"
55
56 /* Offset of the COR register of the PCI card */
57 #define HERMES_PCI_COR (0x26)
58
59 /* Bitmask to reset the card */
60 #define HERMES_PCI_COR_MASK (0x0080)
61
62 /* Magic timeouts for doing the reset.
63 * Those times are straight from wlan-ng, and it is claimed that they
64 * are necessary. Alan will kill me. Take your time and grab a coffee. */
65 #define HERMES_PCI_COR_ONT (250) /* ms */
66 #define HERMES_PCI_COR_OFFT (500) /* ms */
67 #define HERMES_PCI_COR_BUSYT (500) /* ms */
68
69 /*
70 * Do a soft reset of the card using the Configuration Option Register
71 * We need this to get going...
72 * This is the part of the code that is strongly inspired from wlan-ng
73 *
74 * Note : This code is done with irq enabled. This mean that many
75 * interrupts will occur while we are there. This is why we use the
76 * jiffies to regulate time instead of a straight mdelay(). Usually we
77 * need only around 245 iteration of the loop to do 250 ms delay.
78 *
79 * Note bis : Don't try to access HERMES_CMD during the reset phase.
80 * It just won't work !
81 */
orinoco_pci_cor_reset(struct orinoco_private * priv)82 static int orinoco_pci_cor_reset(struct orinoco_private *priv)
83 {
84 struct hermes *hw = &priv->hw;
85 unsigned long timeout;
86 u16 reg;
87
88 /* Assert the reset until the card notices */
89 hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
90 mdelay(HERMES_PCI_COR_ONT);
91
92 /* Give time for the card to recover from this hard effort */
93 hermes_write_regn(hw, PCI_COR, 0x0000);
94 mdelay(HERMES_PCI_COR_OFFT);
95
96 /* The card is ready when it's no longer busy */
97 timeout = jiffies + msecs_to_jiffies(HERMES_PCI_COR_BUSYT);
98 reg = hermes_read_regn(hw, CMD);
99 while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
100 mdelay(1);
101 reg = hermes_read_regn(hw, CMD);
102 }
103
104 /* Still busy? */
105 if (reg & HERMES_CMD_BUSY) {
106 printk(KERN_ERR PFX "Busy timeout\n");
107 return -ETIMEDOUT;
108 }
109
110 return 0;
111 }
112
orinoco_pci_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)113 static int orinoco_pci_init_one(struct pci_dev *pdev,
114 const struct pci_device_id *ent)
115 {
116 int err;
117 struct orinoco_private *priv;
118 struct orinoco_pci_card *card;
119 void __iomem *hermes_io;
120
121 err = pci_enable_device(pdev);
122 if (err) {
123 printk(KERN_ERR PFX "Cannot enable PCI device\n");
124 return err;
125 }
126
127 err = pci_request_regions(pdev, DRIVER_NAME);
128 if (err) {
129 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
130 goto fail_resources;
131 }
132
133 hermes_io = pci_iomap(pdev, 0, 0);
134 if (!hermes_io) {
135 printk(KERN_ERR PFX "Cannot remap chipset registers\n");
136 err = -EIO;
137 goto fail_map_hermes;
138 }
139
140 /* Allocate network device */
141 priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
142 orinoco_pci_cor_reset, NULL);
143 if (!priv) {
144 printk(KERN_ERR PFX "Cannot allocate network device\n");
145 err = -ENOMEM;
146 goto fail_alloc;
147 }
148
149 card = priv->card;
150
151 hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);
152
153 err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
154 DRIVER_NAME, priv);
155 if (err) {
156 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
157 err = -EBUSY;
158 goto fail_irq;
159 }
160
161 err = orinoco_pci_cor_reset(priv);
162 if (err) {
163 printk(KERN_ERR PFX "Initial reset failed\n");
164 goto fail;
165 }
166
167 err = orinoco_init(priv);
168 if (err) {
169 printk(KERN_ERR PFX "orinoco_init() failed\n");
170 goto fail;
171 }
172
173 err = orinoco_if_add(priv, 0, 0, NULL);
174 if (err) {
175 printk(KERN_ERR PFX "orinoco_if_add() failed\n");
176 goto fail_wiphy;
177 }
178
179 pci_set_drvdata(pdev, priv);
180
181 return 0;
182
183 fail_wiphy:
184 wiphy_unregister(priv_to_wiphy(priv));
185 fail:
186 free_irq(pdev->irq, priv);
187
188 fail_irq:
189 free_orinocodev(priv);
190
191 fail_alloc:
192 pci_iounmap(pdev, hermes_io);
193
194 fail_map_hermes:
195 pci_release_regions(pdev);
196
197 fail_resources:
198 pci_disable_device(pdev);
199
200 return err;
201 }
202
orinoco_pci_remove_one(struct pci_dev * pdev)203 static void orinoco_pci_remove_one(struct pci_dev *pdev)
204 {
205 struct orinoco_private *priv = pci_get_drvdata(pdev);
206
207 orinoco_if_del(priv);
208 wiphy_unregister(priv_to_wiphy(priv));
209 free_irq(pdev->irq, priv);
210 free_orinocodev(priv);
211 pci_iounmap(pdev, priv->hw.iobase);
212 pci_release_regions(pdev);
213 pci_disable_device(pdev);
214 }
215
216 static const struct pci_device_id orinoco_pci_id_table[] = {
217 /* Intersil Prism 3 */
218 {0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
219 /* Intersil Prism 2.5 */
220 {0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
221 /* Samsung MagicLAN SWL-2210P */
222 {0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
223 {0,},
224 };
225
226 MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);
227
228 static struct pci_driver orinoco_pci_driver = {
229 .name = DRIVER_NAME,
230 .id_table = orinoco_pci_id_table,
231 .probe = orinoco_pci_init_one,
232 .remove = orinoco_pci_remove_one,
233 .suspend = orinoco_pci_suspend,
234 .resume = orinoco_pci_resume,
235 };
236
237 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
238 " (Pavel Roskin <proski@gnu.org>,"
239 " David Gibson <hermes@gibson.dropbear.id.au> &"
240 " Jean Tourrilhes <jt@hpl.hp.com>)";
241 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> &"
242 " David Gibson <hermes@gibson.dropbear.id.au>");
243 MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
244 MODULE_LICENSE("Dual MPL/GPL");
245
orinoco_pci_init(void)246 static int __init orinoco_pci_init(void)
247 {
248 printk(KERN_DEBUG "%s\n", version);
249 return pci_register_driver(&orinoco_pci_driver);
250 }
251
orinoco_pci_exit(void)252 static void __exit orinoco_pci_exit(void)
253 {
254 pci_unregister_driver(&orinoco_pci_driver);
255 }
256
257 module_init(orinoco_pci_init);
258 module_exit(orinoco_pci_exit);
259
260 /*
261 * Local variables:
262 * c-indent-level: 8
263 * c-basic-offset: 8
264 * tab-width: 8
265 * End:
266 */
267
