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>
96 #include <linux/module.h>
97 #include <linux/kernel.h>
98 #include <linux/init.h>
99 #include <linux/delay.h>
100 #include <linux/pci.h>
104 /* All the magic there is from wlan-ng */
105 /* Magic offset of the reset register of the PCI card */
106 #define HERMES_PCI_COR (0x26)
107 /* Magic bitmask to reset the card */
108 #define HERMES_PCI_COR_MASK (0x0080)
109 /* Magic timeouts for doing the reset.
110 * Those times are straight from wlan-ng, and it is claimed that they
111 * are necessary. Alan will kill me. Take your time and grab a coffee. */
112 #define HERMES_PCI_COR_ONT (250) /* ms */
113 #define HERMES_PCI_COR_OFFT (500) /* ms */
114 #define HERMES_PCI_COR_BUSYT (500) /* ms */
116 /* Orinoco PCI specific data */
117 struct orinoco_pci_card {
118 void __iomem *pci_ioaddr;
122 * Do a soft reset of the PCI card using the Configuration Option Register
123 * We need this to get going...
124 * This is the part of the code that is strongly inspired from wlan-ng
126 * Note : This code is done with irq enabled. This mean that many
127 * interrupts will occur while we are there. This is why we use the
128 * jiffies to regulate time instead of a straight mdelay(). Usually we
129 * need only around 245 iteration of the loop to do 250 ms delay.
131 * Note bis : Don't try to access HERMES_CMD during the reset phase.
132 * It just won't work !
135 orinoco_pci_cor_reset(struct orinoco_private *priv)
137 hermes_t *hw = &priv->hw;
138 unsigned long timeout;
141 /* Assert the reset until the card notice */
142 hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
143 mdelay(HERMES_PCI_COR_ONT);
145 /* Give time for the card to recover from this hard effort */
146 hermes_write_regn(hw, PCI_COR, 0x0000);
147 mdelay(HERMES_PCI_COR_OFFT);
149 /* The card is ready when it's no longer busy */
150 timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
151 reg = hermes_read_regn(hw, CMD);
152 while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
154 reg = hermes_read_regn(hw, CMD);
158 if (reg & HERMES_CMD_BUSY) {
159 printk(KERN_ERR PFX "Busy timeout\n");
167 * Initialise a card. Mostly similar to PLX code.
169 static int orinoco_pci_init_one(struct pci_dev *pdev,
170 const struct pci_device_id *ent)
173 unsigned long pci_iorange;
174 u16 __iomem *pci_ioaddr = NULL;
175 unsigned long pci_iolen;
176 struct orinoco_private *priv = NULL;
177 struct orinoco_pci_card *card;
178 struct net_device *dev = NULL;
180 err = pci_enable_device(pdev);
182 printk(KERN_ERR PFX "Cannot enable PCI device\n");
186 err = pci_request_regions(pdev, DRIVER_NAME);
188 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
192 /* Resource 0 is mapped to the hermes registers */
193 pci_iorange = pci_resource_start(pdev, 0);
194 pci_iolen = pci_resource_len(pdev, 0);
195 pci_ioaddr = ioremap(pci_iorange, pci_iolen);
197 printk(KERN_ERR PFX "Cannot remap hardware registers\n");
201 /* Allocate network device */
202 dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
208 priv = netdev_priv(dev);
210 card->pci_ioaddr = pci_ioaddr;
211 dev->mem_start = pci_iorange;
212 dev->mem_end = pci_iorange + pci_iolen - 1;
213 SET_MODULE_OWNER(dev);
214 SET_NETDEV_DEV(dev, &pdev->dev);
216 hermes_struct_init(&priv->hw, pci_ioaddr, HERMES_32BIT_REGSPACING);
218 printk(KERN_DEBUG PFX "Detected device %s, mem:0x%lx-0x%lx, irq %d\n",
219 pci_name(pdev), dev->mem_start, dev->mem_end, pdev->irq);
221 err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
224 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
228 dev->irq = pdev->irq;
230 /* Perform a COR reset to start the card */
231 err = orinoco_pci_cor_reset(priv);
233 printk(KERN_ERR PFX "Initial reset failed\n");
237 err = register_netdev(dev);
239 printk(KERN_ERR PFX "Failed to register net device\n");
243 pci_set_drvdata(pdev, dev);
248 free_irq(pdev->irq, dev);
251 pci_set_drvdata(pdev, NULL);
252 free_orinocodev(dev);
258 pci_release_regions(pdev);
261 pci_disable_device(pdev);
266 static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
268 struct net_device *dev = pci_get_drvdata(pdev);
269 struct orinoco_private *priv = netdev_priv(dev);
270 struct orinoco_pci_card *card = priv->card;
272 unregister_netdev(dev);
273 free_irq(dev->irq, dev);
274 pci_set_drvdata(pdev, NULL);
275 free_orinocodev(dev);
276 iounmap(card->pci_ioaddr);
277 pci_release_regions(pdev);
278 pci_disable_device(pdev);
281 static int orinoco_pci_suspend(struct pci_dev *pdev, pm_message_t state)
283 struct net_device *dev = pci_get_drvdata(pdev);
284 struct orinoco_private *priv = netdev_priv(dev);
289 err = orinoco_lock(priv, &flags);
291 printk(KERN_ERR "%s: hw_unavailable on orinoco_pci_suspend\n",
296 err = __orinoco_down(dev);
298 printk(KERN_WARNING "%s: orinoco_pci_suspend(): Error %d downing interface\n",
301 netif_device_detach(dev);
303 priv->hw_unavailable++;
305 orinoco_unlock(priv, &flags);
307 pci_save_state(pdev);
308 pci_set_power_state(pdev, PCI_D3hot);
313 static int orinoco_pci_resume(struct pci_dev *pdev)
315 struct net_device *dev = pci_get_drvdata(pdev);
316 struct orinoco_private *priv = netdev_priv(dev);
320 printk(KERN_DEBUG "%s: Orinoco-PCI waking up\n", dev->name);
322 pci_set_power_state(pdev, 0);
323 pci_restore_state(pdev);
325 err = orinoco_reinit_firmware(dev);
327 printk(KERN_ERR "%s: Error %d re-initializing firmware on orinoco_pci_resume()\n",
332 spin_lock_irqsave(&priv->lock, flags);
334 netif_device_attach(dev);
336 priv->hw_unavailable--;
338 if (priv->open && (! priv->hw_unavailable)) {
339 err = __orinoco_up(dev);
341 printk(KERN_ERR "%s: Error %d restarting card on orinoco_pci_resume()\n",
345 spin_unlock_irqrestore(&priv->lock, flags);
350 static struct pci_device_id orinoco_pci_pci_id_table[] = {
351 /* Intersil Prism 3 */
352 {0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
353 /* Intersil Prism 2.5 */
354 {0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
355 /* Samsung MagicLAN SWL-2210P */
356 {0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
360 MODULE_DEVICE_TABLE(pci, orinoco_pci_pci_id_table);
362 static struct pci_driver orinoco_pci_driver = {
364 .id_table = orinoco_pci_pci_id_table,
365 .probe = orinoco_pci_init_one,
366 .remove = __devexit_p(orinoco_pci_remove_one),
367 .suspend = orinoco_pci_suspend,
368 .resume = orinoco_pci_resume,
371 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
372 " (Pavel Roskin <proski@gnu.org>,"
373 " David Gibson <hermes@gibson.dropbear.id.au> &"
374 " Jean Tourrilhes <jt@hpl.hp.com>)";
375 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & David Gibson <hermes@gibson.dropbear.id.au>");
376 MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
377 MODULE_LICENSE("Dual MPL/GPL");
379 static int __init orinoco_pci_init(void)
381 printk(KERN_DEBUG "%s\n", version);
382 return pci_module_init(&orinoco_pci_driver);
385 static void __exit orinoco_pci_exit(void)
387 pci_unregister_driver(&orinoco_pci_driver);
390 module_init(orinoco_pci_init);
391 module_exit(orinoco_pci_exit);