2 * Copyright (C) 2002 Intersil Americas Inc.
3 * Copyright (C) 2003 Herbert Valerio Riedel <hvr@gnu.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/module.h>
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/init.h> /* For __init, __exit */
24 #include <linux/dma-mapping.h>
26 #include "prismcompat.h"
27 #include "islpci_dev.h"
28 #include "islpci_mgt.h" /* for pc_debug */
31 MODULE_AUTHOR("[Intersil] R.Bastings and W.Termorshuizen, The prism54.org Development Team <prism54-devel@prism54.org>");
32 MODULE_DESCRIPTION("The Prism54 802.11 Wireless LAN adapter");
33 MODULE_LICENSE("GPL");
35 static int init_pcitm = 0;
36 module_param(init_pcitm, int, 0);
38 /* In this order: vendor, device, subvendor, subdevice, class, class_mask,
40 * If you have an update for this please contact prism54-devel@prism54.org
41 * The latest list can be found at http://prism54.org/supported_cards.php */
42 static const struct pci_device_id prism54_id_tbl[] = {
43 /* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
46 PCI_ANY_ID, PCI_ANY_ID,
50 /* 3COM 3CRWE154G72 Wireless LAN adapter */
53 PCI_ANY_ID, PCI_ANY_ID,
57 /* Intersil PRISM Indigo Wireless LAN adapter */
60 PCI_ANY_ID, PCI_ANY_ID,
64 /* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
67 PCI_ANY_ID, PCI_ANY_ID,
75 /* register the device with the Hotplug facilities of the kernel */
76 MODULE_DEVICE_TABLE(pci, prism54_id_tbl);
78 static int prism54_probe(struct pci_dev *, const struct pci_device_id *);
79 static void prism54_remove(struct pci_dev *);
80 static int prism54_suspend(struct pci_dev *, pm_message_t state);
81 static int prism54_resume(struct pci_dev *);
83 static struct pci_driver prism54_driver = {
85 .id_table = prism54_id_tbl,
86 .probe = prism54_probe,
87 .remove = prism54_remove,
88 .suspend = prism54_suspend,
89 .resume = prism54_resume,
92 /******************************************************************************
93 Module initialization functions
94 ******************************************************************************/
97 prism54_probe(struct pci_dev *pdev, const struct pci_device_id *id)
99 struct net_device *ndev;
102 islpci_private *priv;
105 /* Enable the pci device */
106 if (pci_enable_device(pdev)) {
107 printk(KERN_ERR "%s: pci_enable_device() failed.\n", DRV_NAME);
111 /* check whether the latency timer is set correctly */
112 pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency_tmr);
113 #if VERBOSE > SHOW_ERROR_MESSAGES
114 DEBUG(SHOW_TRACING, "latency timer: %x\n", latency_tmr);
116 if (latency_tmr < PCIDEVICE_LATENCY_TIMER_MIN) {
117 /* set the latency timer */
118 pci_write_config_byte(pdev, PCI_LATENCY_TIMER,
119 PCIDEVICE_LATENCY_TIMER_VAL);
123 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
124 printk(KERN_ERR "%s: 32-bit PCI DMA not supported", DRV_NAME);
125 goto do_pci_disable_device;
128 /* 0x40 is the programmable timer to configure the response timeout (TRDY_TIMEOUT)
129 * 0x41 is the programmable timer to configure the retry timeout (RETRY_TIMEOUT)
130 * The RETRY_TIMEOUT is used to set the number of retries that the core, as a
131 * Master, will perform before abandoning a cycle. The default value for
132 * RETRY_TIMEOUT is 0x80, which far exceeds the PCI 2.1 requirement for new
133 * devices. A write of zero to the RETRY_TIMEOUT register disables this
134 * function to allow use with any non-compliant legacy devices that may
135 * execute more retries.
137 * Writing zero to both these two registers will disable both timeouts and
138 * *can* solve problems caused by devices that are slow to respond.
139 * Make this configurable - MSW
141 if ( init_pcitm >= 0 ) {
142 pci_write_config_byte(pdev, 0x40, (u8)init_pcitm);
143 pci_write_config_byte(pdev, 0x41, (u8)init_pcitm);
145 printk(KERN_INFO "PCI TRDY/RETRY unchanged\n");
148 /* request the pci device I/O regions */
149 rvalue = pci_request_regions(pdev, DRV_NAME);
151 printk(KERN_ERR "%s: pci_request_regions failure (rc=%d)\n",
153 goto do_pci_disable_device;
156 /* check if the memory window is indeed set */
157 rvalue = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &mem_addr);
158 if (rvalue || !mem_addr) {
159 printk(KERN_ERR "%s: PCI device memory region not configured; fix your BIOS or CardBus bridge/drivers\n",
161 goto do_pci_release_regions;
164 /* enable PCI bus-mastering */
165 DEBUG(SHOW_TRACING, "%s: pci_set_master(pdev)\n", DRV_NAME);
166 pci_set_master(pdev);
169 pci_try_set_mwi(pdev);
171 /* setup the network device interface and its structure */
172 if (!(ndev = islpci_setup(pdev))) {
173 /* error configuring the driver as a network device */
174 printk(KERN_ERR "%s: could not configure network device\n",
176 goto do_pci_clear_mwi;
179 priv = netdev_priv(ndev);
180 islpci_set_state(priv, PRV_STATE_PREBOOT); /* we are attempting to boot */
182 /* card is in unknown state yet, might have some interrupts pending */
183 isl38xx_disable_interrupts(priv->device_base);
185 /* request for the interrupt before uploading the firmware */
186 rvalue = request_irq(pdev->irq, &islpci_interrupt,
187 IRQF_SHARED, ndev->name, priv);
190 /* error, could not hook the handler to the irq */
191 printk(KERN_ERR "%s: could not install IRQ handler\n",
193 goto do_unregister_netdev;
196 /* firmware upload is triggered in islpci_open */
200 do_unregister_netdev:
201 unregister_netdev(ndev);
202 islpci_free_memory(priv);
203 pci_set_drvdata(pdev, NULL);
208 do_pci_release_regions:
209 pci_release_regions(pdev);
210 do_pci_disable_device:
211 pci_disable_device(pdev);
215 /* set by cleanup_module */
216 static volatile int __in_cleanup_module = 0;
218 /* this one removes one(!!) instance only */
220 prism54_remove(struct pci_dev *pdev)
222 struct net_device *ndev = pci_get_drvdata(pdev);
223 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
226 if (!__in_cleanup_module) {
227 printk(KERN_DEBUG "%s: hot unplug detected\n", ndev->name);
228 islpci_set_state(priv, PRV_STATE_OFF);
231 printk(KERN_DEBUG "%s: removing device\n", ndev->name);
233 unregister_netdev(ndev);
235 /* free the interrupt request */
237 if (islpci_get_state(priv) != PRV_STATE_OFF) {
238 isl38xx_disable_interrupts(priv->device_base);
239 islpci_set_state(priv, PRV_STATE_OFF);
240 /* This bellow causes a lockup at rmmod time. It might be
241 * because some interrupts still linger after rmmod time,
243 /* pci_set_power_state(pdev, 3);*/ /* try to power-off */
246 free_irq(pdev->irq, priv);
248 /* free the PCI memory and unmap the remapped page */
249 islpci_free_memory(priv);
251 pci_set_drvdata(pdev, NULL);
257 pci_release_regions(pdev);
259 pci_disable_device(pdev);
263 prism54_suspend(struct pci_dev *pdev, pm_message_t state)
265 struct net_device *ndev = pci_get_drvdata(pdev);
266 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
270 pci_save_state(pdev);
272 /* tell the device not to trigger interrupts for now... */
273 isl38xx_disable_interrupts(priv->device_base);
275 /* from now on assume the hardware was already powered down
276 and don't touch it anymore */
277 islpci_set_state(priv, PRV_STATE_OFF);
279 netif_stop_queue(ndev);
280 netif_device_detach(ndev);
286 prism54_resume(struct pci_dev *pdev)
288 struct net_device *ndev = pci_get_drvdata(pdev);
289 islpci_private *priv = ndev ? netdev_priv(ndev) : NULL;
294 printk(KERN_NOTICE "%s: got resume request\n", ndev->name);
296 err = pci_enable_device(pdev);
298 printk(KERN_ERR "%s: pci_enable_device failed on resume\n",
303 pci_restore_state(pdev);
305 /* alright let's go into the PREBOOT state */
306 islpci_reset(priv, 1);
308 netif_device_attach(ndev);
309 netif_start_queue(ndev);
315 prism54_module_init(void)
317 printk(KERN_INFO "Loaded %s driver, version %s\n",
318 DRV_NAME, DRV_VERSION);
320 __bug_on_wrong_struct_sizes ();
322 return pci_register_driver(&prism54_driver);
325 /* by the time prism54_module_exit() terminates, as a postcondition
326 * all instances will have been destroyed by calls to
327 * prism54_remove() */
329 prism54_module_exit(void)
331 __in_cleanup_module = 1;
333 pci_unregister_driver(&prism54_driver);
335 printk(KERN_INFO "Unloaded %s driver\n", DRV_NAME);
337 __in_cleanup_module = 0;
340 /* register entry points */
341 module_init(prism54_module_init);
342 module_exit(prism54_module_exit);