3 * Driver for Prism II devices that have a direct PCI interface
4 * (i.e., not in a Pcmcia or PLX bridge)
6 * Specifically here we're talking about the Linksys WMP11
8 * Current maintainers (as of 29 September 2003) are:
9 * Pavel Roskin <proski AT gnu.org>
10 * and David Gibson <hermes AT gibson.dropbear.id.au>
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.
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/
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.
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.
45 * Theory of operation...
47 * Maybe you had a look in orinoco_plx. Well, this is totally different...
49 * The card contains only one PCI region, which contains all the usual
52 * The driver will memory map this region in normal memory. Because
53 * the hermes registers are mapped in normal memory and not in ISA I/O
54 * post space, we can't use the usual inw/outw macros and we need to
56 * This slight difference force us to compile our own version of
57 * hermes.c with the register access macro changed. That's a bit
58 * hackish but works fine.
60 * Note that the PCI region is pretty big (4K). That's much more than
61 * the usual set of hermes register (0x0 -> 0x3E). I've got a strong
62 * suspicion that the whole memory space of the adapter is in fact in
63 * this region. Accessing directly the adapter memory instead of going
64 * through the usual register would speed up significantely the
67 * Finally, the card looks like this :
68 -----------------------
69 Bus 0, device 14, function 0:
70 Network controller: PCI device 1260:3873 (Harris Semiconductor) (rev 1).
72 Master Capable. Latency=248.
73 Prefetchable 32 bit memory at 0xffbcc000 [0xffbccfff].
74 -----------------------
75 00:0e.0 Network controller: Harris Semiconductor: Unknown device 3873 (rev 01)
76 Subsystem: Unknown device 1737:3874
77 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
78 Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
79 Latency: 248 set, cache line size 08
80 Interrupt: pin A routed to IRQ 11
81 Region 0: Memory at ffbcc000 (32-bit, prefetchable) [size=4K]
82 Capabilities: [dc] Power Management version 2
83 Flags: PMEClk- AuxPwr- DSI- D1+ D2+ PME+
84 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
85 -----------------------
92 #define DRIVER_NAME "orinoco_pci"
93 #define PFX DRIVER_NAME ": "
95 #include <linux/config.h>
97 #include <linux/module.h>
98 #include <linux/kernel.h>
99 #include <linux/init.h>
100 #include <linux/sched.h>
101 #include <linux/ptrace.h>
102 #include <linux/slab.h>
103 #include <linux/string.h>
104 #include <linux/timer.h>
105 #include <linux/ioport.h>
106 #include <linux/netdevice.h>
107 #include <linux/if_arp.h>
108 #include <linux/etherdevice.h>
109 #include <linux/list.h>
110 #include <linux/pci.h>
111 #include <linux/fcntl.h>
113 #include <asm/uaccess.h>
115 #include <asm/system.h>
120 /* All the magic there is from wlan-ng */
121 /* Magic offset of the reset register of the PCI card */
122 #define HERMES_PCI_COR (0x26)
123 /* Magic bitmask to reset the card */
124 #define HERMES_PCI_COR_MASK (0x0080)
125 /* Magic timeouts for doing the reset.
126 * Those times are straight from wlan-ng, and it is claimed that they
127 * are necessary. Alan will kill me. Take your time and grab a coffee. */
128 #define HERMES_PCI_COR_ONT (250) /* ms */
129 #define HERMES_PCI_COR_OFFT (500) /* ms */
130 #define HERMES_PCI_COR_BUSYT (500) /* ms */
132 /* Orinoco PCI specific data */
133 struct orinoco_pci_card {
134 void __iomem *pci_ioaddr;
138 * Do a soft reset of the PCI card using the Configuration Option Register
139 * We need this to get going...
140 * This is the part of the code that is strongly inspired from wlan-ng
142 * Note : This code is done with irq enabled. This mean that many
143 * interrupts will occur while we are there. This is why we use the
144 * jiffies to regulate time instead of a straight mdelay(). Usually we
145 * need only around 245 iteration of the loop to do 250 ms delay.
147 * Note bis : Don't try to access HERMES_CMD during the reset phase.
148 * It just won't work !
151 orinoco_pci_cor_reset(struct orinoco_private *priv)
153 hermes_t *hw = &priv->hw;
154 unsigned long timeout;
157 /* Assert the reset until the card notice */
158 hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
159 mdelay(HERMES_PCI_COR_ONT);
161 /* Give time for the card to recover from this hard effort */
162 hermes_write_regn(hw, PCI_COR, 0x0000);
163 mdelay(HERMES_PCI_COR_OFFT);
165 /* The card is ready when it's no longer busy */
166 timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
167 reg = hermes_read_regn(hw, CMD);
168 while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
170 reg = hermes_read_regn(hw, CMD);
174 if (reg & HERMES_CMD_BUSY) {
175 printk(KERN_ERR PFX "Busy timeout\n");
183 * Initialise a card. Mostly similar to PLX code.
185 static int orinoco_pci_init_one(struct pci_dev *pdev,
186 const struct pci_device_id *ent)
189 unsigned long pci_iorange;
190 u16 __iomem *pci_ioaddr = NULL;
191 unsigned long pci_iolen;
192 struct orinoco_private *priv = NULL;
193 struct orinoco_pci_card *card;
194 struct net_device *dev = NULL;
196 err = pci_enable_device(pdev);
198 printk(KERN_ERR PFX "Cannot enable PCI device\n");
202 err = pci_request_regions(pdev, DRIVER_NAME);
204 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
208 /* Resource 0 is mapped to the hermes registers */
209 pci_iorange = pci_resource_start(pdev, 0);
210 pci_iolen = pci_resource_len(pdev, 0);
211 pci_ioaddr = ioremap(pci_iorange, pci_iolen);
213 printk(KERN_ERR PFX "Cannot remap hardware registers\n");
217 /* Allocate network device */
218 dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
224 priv = netdev_priv(dev);
226 card->pci_ioaddr = pci_ioaddr;
227 dev->mem_start = pci_iorange;
228 dev->mem_end = pci_iorange + pci_iolen - 1;
229 SET_MODULE_OWNER(dev);
230 SET_NETDEV_DEV(dev, &pdev->dev);
232 hermes_struct_init(&priv->hw, pci_ioaddr, HERMES_32BIT_REGSPACING);
234 printk(KERN_DEBUG PFX "Detected device %s, mem:0x%lx-0x%lx, irq %d\n",
235 pci_name(pdev), dev->mem_start, dev->mem_end, pdev->irq);
237 err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
240 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
244 dev->irq = pdev->irq;
246 /* Perform a COR reset to start the card */
247 err = orinoco_pci_cor_reset(priv);
249 printk(KERN_ERR PFX "Initial reset failed\n");
253 err = register_netdev(dev);
255 printk(KERN_ERR PFX "Failed to register net device\n");
259 pci_set_drvdata(pdev, dev);
264 free_irq(pdev->irq, dev);
267 pci_set_drvdata(pdev, NULL);
268 free_orinocodev(dev);
274 pci_release_regions(pdev);
277 pci_disable_device(pdev);
282 static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
284 struct net_device *dev = pci_get_drvdata(pdev);
285 struct orinoco_private *priv = netdev_priv(dev);
286 struct orinoco_pci_card *card = priv->card;
288 unregister_netdev(dev);
289 free_irq(dev->irq, dev);
290 pci_set_drvdata(pdev, NULL);
291 free_orinocodev(dev);
292 iounmap(card->pci_ioaddr);
293 pci_release_regions(pdev);
294 pci_disable_device(pdev);
297 static int orinoco_pci_suspend(struct pci_dev *pdev, pm_message_t state)
299 struct net_device *dev = pci_get_drvdata(pdev);
300 struct orinoco_private *priv = netdev_priv(dev);
304 printk(KERN_DEBUG "%s: Orinoco-PCI entering sleep mode (state=%d)\n",
307 err = orinoco_lock(priv, &flags);
309 printk(KERN_ERR "%s: hw_unavailable on orinoco_pci_suspend\n",
314 err = __orinoco_down(dev);
316 printk(KERN_WARNING "%s: orinoco_pci_suspend(): Error %d downing interface\n",
319 netif_device_detach(dev);
321 priv->hw_unavailable++;
323 orinoco_unlock(priv, &flags);
325 pci_save_state(pdev);
326 pci_set_power_state(pdev, PCI_D3hot);
331 static int orinoco_pci_resume(struct pci_dev *pdev)
333 struct net_device *dev = pci_get_drvdata(pdev);
334 struct orinoco_private *priv = netdev_priv(dev);
338 printk(KERN_DEBUG "%s: Orinoco-PCI waking up\n", dev->name);
340 pci_set_power_state(pdev, 0);
341 pci_restore_state(pdev);
343 err = orinoco_reinit_firmware(dev);
345 printk(KERN_ERR "%s: Error %d re-initializing firmware on orinoco_pci_resume()\n",
350 spin_lock_irqsave(&priv->lock, flags);
352 netif_device_attach(dev);
354 priv->hw_unavailable--;
356 if (priv->open && (! priv->hw_unavailable)) {
357 err = __orinoco_up(dev);
359 printk(KERN_ERR "%s: Error %d restarting card on orinoco_pci_resume()\n",
363 spin_unlock_irqrestore(&priv->lock, flags);
368 static struct pci_device_id orinoco_pci_pci_id_table[] = {
369 /* Intersil Prism 3 */
370 {0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
371 /* Intersil Prism 2.5 */
372 {0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
373 /* Samsung MagicLAN SWL-2210P */
374 {0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
378 MODULE_DEVICE_TABLE(pci, orinoco_pci_pci_id_table);
380 static struct pci_driver orinoco_pci_driver = {
382 .id_table = orinoco_pci_pci_id_table,
383 .probe = orinoco_pci_init_one,
384 .remove = __devexit_p(orinoco_pci_remove_one),
385 .suspend = orinoco_pci_suspend,
386 .resume = orinoco_pci_resume,
389 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
390 " (Pavel Roskin <proski@gnu.org>,"
391 " David Gibson <hermes@gibson.dropbear.id.au> &"
392 " Jean Tourrilhes <jt@hpl.hp.com>)";
393 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & David Gibson <hermes@gibson.dropbear.id.au>");
394 MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
395 MODULE_LICENSE("Dual MPL/GPL");
397 static int __init orinoco_pci_init(void)
399 printk(KERN_DEBUG "%s\n", version);
400 return pci_module_init(&orinoco_pci_driver);
403 static void __exit orinoco_pci_exit(void)
405 pci_unregister_driver(&orinoco_pci_driver);
408 module_init(orinoco_pci_init);
409 module_exit(orinoco_pci_exit);