1 /*
2 *
3 * Copyright (C) 2002 Intersil Americas Inc.
4 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21 #include <linux/version.h>
22 #include <linux/module.h>
23 #include <linux/pci.h>
24 #include <linux/delay.h>
25 #include <linux/init.h> /* For __init, __exit */
26
27 #include "prismcompat.h"
28 #include "islpci_dev.h"
29 #include "islpci_mgt.h" /* for pc_debug */
30 #include "isl_oid.h"
31
32 #define DRV_NAME "prism54"
33 #define DRV_VERSION "1.2"
34
35 MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Development Team <prism54-devel@prism54.org>");
36 MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
37 MODULE_LICENSE("GPL");
38
39 static int init_pcitm = 0;
40 module_param(init_pcitm, int, 0);
41
42 /* In this order: vendor, device, subvendor, subdevice, class, class_mask,
43 * driver_data
44 * If you have an update for this please contact prism54-devel@prism54.org
45 * The latest list can be found at http://prism54.org/supported_cards.php */
46 static const struct pci_device_id prism54_id_tbl[] = {
47 /* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
48 {
49 0x1260, 0x3890,
50 PCI_ANY_ID, PCI_ANY_ID,
51 0, 0, 0
52 },
53
54 /* 3COM 3CRWE154G72 Wireless LAN adapter */
55 {
56 0x10b7, 0x6001,
57 PCI_ANY_ID, PCI_ANY_ID,
58 0, 0, 0
59 },
60
61 /* Intersil PRISM Indigo Wireless LAN adapter */
62 {
63 0x1260, 0x3877,
64 PCI_ANY_ID, PCI_ANY_ID,
65 0, 0, 0
66 },
67
68 /* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
69 {
70 0x1260, 0x3886,
71 PCI_ANY_ID, PCI_ANY_ID,
72 0, 0, 0
73 },
74
75 /* End of list */
76 {0,0,0,0,0,0,0}
77 };
78
79 /* register the device with the Hotplug facilities of the kernel */
80 MODULE_DEVICE_TABLE(pci, prism54_id_tbl);
81
82 static int prism54_probe(struct pci_dev *, const struct pci_device_id *);
83 static void prism54_remove(struct pci_dev *);
84 static int prism54_suspend(struct pci_dev *, u32 state);
85 static int prism54_resume(struct pci_dev *);
86
87 static struct pci_driver prism54_driver = {
88 .name = DRV_NAME,
89 .id_table = prism54_id_tbl,
90 .probe = prism54_probe,
91 .remove = prism54_remove,
92 .suspend = prism54_suspend,
93 .resume = prism54_resume,
94 /* .enable_wake ; we don't support this yet */
95 };
96
97 /******************************************************************************
98 Module initialization functions
99 ******************************************************************************/
100
101 int
102 prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
103 {
104 struct net_device *ndev;
105 u8 latency_tmr;
106 u32 mem_addr;
107 islpci_private *priv;
108 int rvalue;
109
110 /* Enable the pci device */
111 if (pci_enable_device(pdev)) {
112 printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME);
113 return -ENODEV;
114 }
115
116 /* check whether the latency timer is set correctly */
117 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr);
118 #if VERBOSE > SHOW_ERROR_MESSAGES
119 DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr);
120 #endif
121 if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) {
122 /* set the latency timer */
123 pci_write_config_byte(pdev, PCI_LATENCY_TIMER,
124 PCIDEVICE_LATENCY_TIMER_VAL);
125 }
126
127 /* enable PCI DMA */
128 if (pci_set_dma_mask(pdev, 0xffffffff)) {
129 printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME);
130 goto do_pci_disable_device;
131 }
132
133 /* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT)
134 * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT)
135 * The RETRY_TIMEOUT is used to set the number of retries that the core, as a
136 * Master, will perform before abandoning a cycle. The default value for
137 * RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new
138 * devices. A write of zero to the RETRY_TIMEOUT register disables this
139 * function to allow use with any non-compliant legacy devices that may
140 * execute more retries.
141 *
142 * Writing zero to both these two registers will disable both timeouts and
143 * *can* solve problems caused by devices that are slow to respond.
144 * Make this configurable - MSW
145 */
146 if ( init_pcitm >= 0 ) {
147 pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
148 pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
149 } else {
150 printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
151 }
152
153 /* request the pci device I/O regions */
154 rvalue = pci_request_regions(pdev, DRV_NAME);
155 if (rvalue) {
156 printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n",
157 DRV_NAME, rvalue);
158 goto do_pci_disable_device;
159 }
160
161 /* check if the memory window is indeed set */
162 rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr);
163 if (rvalue || !mem_addr) {
164 printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n",
165 DRV_NAME);
166 goto do_pci_release_regions;
167 }
168
169 /* enable PCI bus-mastering */
170 DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
171 pci_set_master(pdev);
172
173 /* enable MWI */
174 pci_set_mwi(pdev);
175
176 /* setup the network device interface and its structure */
177 if (!(ndev = islpci_setup(pdev))) {
178 /* error configuring the driver as a network device */
179 printk(KERN_ERR "%s: could not configure network device\n",
180 DRV_NAME);
181 goto do_pci_release_regions;
182 }
183
184 priv = netdev_priv(ndev);
185 islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */
186
187 /* card is in unknown state yet, might have some interrupts pending */
188 isl38xx_disable_interrupts(priv->device_base);
189
190 /* request for the interrupt before uploading the firmware */
191 rvalue = request_irq(pdev->irq, &islpci_interrupt,
192 SA_SHIRQ, ndev->name, priv);
193
194 if (rvalue) {
195 /* error, could not hook the handler to the irq */
196 printk(KERN_ERR "%s: could not install IRQ handler\n",
197 ndev->name);
198 goto do_unregister_netdev;
199 }
200
201 /* firmware upload is triggered in islpci_open */
202
203 return 0;
204
205 do_unregister_netdev:
206 unregister_netdev(ndev);
207 islpci_free_memory(priv);
208 pci_set_drvdata(pdev, NULL);
209 free_netdev(ndev);
210 priv = NULL;
211 do_pci_release_regions:
212 pci_release_regions(pdev);
213 do_pci_disable_device:
214 pci_disable_device(pdev);
215 return -EIO;
216 }
217
218 /* set by cleanup_module */
219 static volatile int __in_cleanup_module = 0;
220
221 /* this one removes one(!!) instance only */
222 void
223 prism54_remove(struct pci_dev *pdev)
224 {
225 struct net_device *ndev = pci_get_drvdata(pdev);
226 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
227 BUG_ON(!priv);
228
229 if (!__in_cleanup_module) {
230 printk(KERN_DEBUG "%s: hot unplug detected\n", ndev->name);
231 islpci_set_state(priv, PRV_STATE_OFF);
232 }
233
234 printk(KERN_DEBUG "%s: removing device\n", ndev->name);
235
236 unregister_netdev(ndev);
237
238 /* free the interrupt request */
239
240 if (islpci_get_state(priv) != PRV_STATE_OFF) {
241 isl38xx_disable_interrupts(priv->device_base);
242 islpci_set_state(priv, PRV_STATE_OFF);
243 /* This bellow causes a lockup at rmmod time. It might be
244 * because some interrupts still linger after rmmod time,
245 * see bug #17 */
246 /* pci_set_power_state(pdev, 3);*/ /* try to power-off */
247 }
248
249 free_irq(pdev->irq, priv);
250
251 /* free the PCI memory and unmap the remapped page */
252 islpci_free_memory(priv);
253
254 pci_set_drvdata(pdev, NULL);
255 free_netdev(ndev);
256 priv = NULL;
257
258 pci_release_regions(pdev);
259
260 pci_disable_device(pdev);
261 }
262
263 int
264 prism54_suspend(struct pci_dev *pdev, u32 state)
265 {
266 struct net_device *ndev = pci_get_drvdata(pdev);
267 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
268 BUG_ON(!priv);
269
270 printk(KERN_NOTICE "%s: got suspend request (state %d)\n",
271 ndev->name, state);
272
273 pci_save_state(pdev);
274
275 /* tell the device not to trigger interrupts for now... */
276 isl38xx_disable_interrupts(priv->device_base);
277
278 /* from now on assume the hardware was already powered down
279 and don't touch it anymore */
280 islpci_set_state(priv, PRV_STATE_OFF);
281
282 netif_stop_queue(ndev);
283 netif_device_detach(ndev);
284
285 return 0;
286 }
287
288 int
289 prism54_resume(struct pci_dev *pdev)
290 {
291 struct net_device *ndev = pci_get_drvdata(pdev);
292 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
293 BUG_ON(!priv);
294
295 pci_enable_device(pdev);
296
297 printk(KERN_NOTICE "%s: got resume request\n", ndev->name);
298
299 pci_restore_state(pdev);
300
301 /* alright let's go into the PREBOOT state */
302 islpci_reset(priv, 1);
303
304 netif_device_attach(ndev);
305 netif_start_queue(ndev);
306
307 return 0;
308 }
309
310 static int __init
311 prism54_module_init(void)
312 {
313 printk(KERN_INFO "Loaded %s driver, version %s\n",
314 DRV_NAME, DRV_VERSION);
315
316 __bug_on_wrong_struct_sizes ();
317
318 return pci_module_init(&prism54_driver);
319 }
320
321 /* by the time prism54_module_exit() terminates, as a postcondition
322 * all instances will have been destroyed by calls to
323 * prism54_remove() */
324 static void __exit
325 prism54_module_exit(void)
326 {
327 __in_cleanup_module = 1;
328
329 pci_unregister_driver(&prism54_driver);
330
331 printk(KERN_INFO "Unloaded %s driver\n", DRV_NAME);
332
333 __in_cleanup_module = 0;
334 }
335
336 /* register entry points */
337 module_init(prism54_module_init);
338 module_exit(prism54_module_exit);
339 /* EOF */
340
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