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