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linux-next/drivers/net/wireless/orinoco_pci.c
Pavel Roskin 461c078c9c [PATCH] orinoco: don't put PCI resource data to the network device
The resource data in the network device is intended for ISA and other
older busses, but not for PCI.  Don't put PCI data there.  Don't (ab)use
the network device for keeping the IRQ number.

Retire orinoco_pci_setup_netdev(), and print some minimal information to
the kernel log instead, identifying the network device and the driver
mostly to identify problems at startup.  Scripts should rely on sysfs.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2006-05-05 17:10:41 -04:00

266 lines
7.5 KiB
C

/* orinoco_pci.c
*
* Driver for Prism 2.5/3 devices that have a direct PCI interface
* (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
* The card contains only one PCI region, which contains all the usual
* hermes registers, as well as the COR register.
*
* Current maintainers are:
* Pavel Roskin <proski AT gnu.org>
* and David Gibson <hermes AT gibson.dropbear.id.au>
*
* Some of this code is borrowed from orinoco_plx.c
* Copyright (C) 2001 Daniel Barlow <dan AT telent.net>
* Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
* has been copied from it. linux-wlan-ng-0.1.10 is originally :
* Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
* This file originally written by:
* Copyright (C) 2001 Jean Tourrilhes <jt AT hpl.hp.com>
* And is now maintained by:
* (C) Copyright David Gibson, IBM Corp. 2002-2003.
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License
* at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and
* limitations under the License.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License version 2 (the "GPL"), in
* which case the provisions of the GPL are applicable instead of the
* above. If you wish to allow the use of your version of this file
* only under the terms of the GPL and not to allow others to use your
* version of this file under the MPL, indicate your decision by
* deleting the provisions above and replace them with the notice and
* other provisions required by the GPL. If you do not delete the
* provisions above, a recipient may use your version of this file
* under either the MPL or the GPL.
*/
#define DRIVER_NAME "orinoco_pci"
#define PFX DRIVER_NAME ": "
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include "orinoco.h"
#include "orinoco_pci.h"
/* Offset of the COR register of the PCI card */
#define HERMES_PCI_COR (0x26)
/* Bitmask to reset the card */
#define HERMES_PCI_COR_MASK (0x0080)
/* Magic timeouts for doing the reset.
* Those times are straight from wlan-ng, and it is claimed that they
* are necessary. Alan will kill me. Take your time and grab a coffee. */
#define HERMES_PCI_COR_ONT (250) /* ms */
#define HERMES_PCI_COR_OFFT (500) /* ms */
#define HERMES_PCI_COR_BUSYT (500) /* ms */
/*
* Do a soft reset of the card using the Configuration Option Register
* We need this to get going...
* This is the part of the code that is strongly inspired from wlan-ng
*
* Note : This code is done with irq enabled. This mean that many
* interrupts will occur while we are there. This is why we use the
* jiffies to regulate time instead of a straight mdelay(). Usually we
* need only around 245 iteration of the loop to do 250 ms delay.
*
* Note bis : Don't try to access HERMES_CMD during the reset phase.
* It just won't work !
*/
static int orinoco_pci_cor_reset(struct orinoco_private *priv)
{
hermes_t *hw = &priv->hw;
unsigned long timeout;
u16 reg;
/* Assert the reset until the card notices */
hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
mdelay(HERMES_PCI_COR_ONT);
/* Give time for the card to recover from this hard effort */
hermes_write_regn(hw, PCI_COR, 0x0000);
mdelay(HERMES_PCI_COR_OFFT);
/* The card is ready when it's no longer busy */
timeout = jiffies + (HERMES_PCI_COR_BUSYT * HZ / 1000);
reg = hermes_read_regn(hw, CMD);
while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
mdelay(1);
reg = hermes_read_regn(hw, CMD);
}
/* Still busy? */
if (reg & HERMES_CMD_BUSY) {
printk(KERN_ERR PFX "Busy timeout\n");
return -ETIMEDOUT;
}
return 0;
}
static int orinoco_pci_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int err;
struct orinoco_private *priv;
struct orinoco_pci_card *card;
struct net_device *dev;
void __iomem *hermes_io;
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR PFX "Cannot enable PCI device\n");
return err;
}
err = pci_request_regions(pdev, DRIVER_NAME);
if (err) {
printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
goto fail_resources;
}
hermes_io = pci_iomap(pdev, 0, 0);
if (!hermes_io) {
printk(KERN_ERR PFX "Cannot remap chipset registers\n");
err = -EIO;
goto fail_map_hermes;
}
/* Allocate network device */
dev = alloc_orinocodev(sizeof(*card), orinoco_pci_cor_reset);
if (!dev) {
printk(KERN_ERR PFX "Cannot allocate network device\n");
err = -ENOMEM;
goto fail_alloc;
}
priv = netdev_priv(dev);
card = priv->card;
SET_MODULE_OWNER(dev);
SET_NETDEV_DEV(dev, &pdev->dev);
hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);
err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
dev->name, dev);
if (err) {
printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
err = -EBUSY;
goto fail_irq;
}
err = orinoco_pci_cor_reset(priv);
if (err) {
printk(KERN_ERR PFX "Initial reset failed\n");
goto fail;
}
err = register_netdev(dev);
if (err) {
printk(KERN_ERR PFX "Cannot register network device\n");
goto fail;
}
pci_set_drvdata(pdev, dev);
printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
pci_name(pdev));
return 0;
fail:
free_irq(pdev->irq, dev);
fail_irq:
pci_set_drvdata(pdev, NULL);
free_orinocodev(dev);
fail_alloc:
pci_iounmap(pdev, hermes_io);
fail_map_hermes:
pci_release_regions(pdev);
fail_resources:
pci_disable_device(pdev);
return err;
}
static void __devexit orinoco_pci_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct orinoco_private *priv = netdev_priv(dev);
unregister_netdev(dev);
free_irq(pdev->irq, dev);
pci_set_drvdata(pdev, NULL);
free_orinocodev(dev);
pci_iounmap(pdev, priv->hw.iobase);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static struct pci_device_id orinoco_pci_id_table[] = {
/* Intersil Prism 3 */
{0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
/* Intersil Prism 2.5 */
{0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
/* Samsung MagicLAN SWL-2210P */
{0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
{0,},
};
MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);
static struct pci_driver orinoco_pci_driver = {
.name = DRIVER_NAME,
.id_table = orinoco_pci_id_table,
.probe = orinoco_pci_init_one,
.remove = __devexit_p(orinoco_pci_remove_one),
.suspend = orinoco_pci_suspend,
.resume = orinoco_pci_resume,
};
static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
" (Pavel Roskin <proski@gnu.org>,"
" David Gibson <hermes@gibson.dropbear.id.au> &"
" Jean Tourrilhes <jt@hpl.hp.com>)";
MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> & David Gibson <hermes@gibson.dropbear.id.au>");
MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
MODULE_LICENSE("Dual MPL/GPL");
static int __init orinoco_pci_init(void)
{
printk(KERN_DEBUG "%s\n", version);
return pci_module_init(&orinoco_pci_driver);
}
static void __exit orinoco_pci_exit(void)
{
pci_unregister_driver(&orinoco_pci_driver);
}
module_init(orinoco_pci_init);
module_exit(orinoco_pci_exit);
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* tab-width: 8
* End:
*/