LXR linux/drivers/net/wireless/intersil/orinoco/orinoco

   1/* orinoco_pci.c
   2 *
   3 * Driver for Prism 2.5/3 devices that have a direct PCI interface
   4 * (i.e. these are not PCMCIA cards in a PCMCIA-to-PCI bridge).
   5 * The card contains only one PCI region, which contains all the usual
   6 * hermes registers, as well as the COR register.
   7 *
   8 * Current maintainers are:
   9 *      Pavel Roskin <proski AT gnu.org>
  10 * and  David Gibson <hermes AT gibson.dropbear.id.au>
  11 *
  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.
  21 *
  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/
  26 *
  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.
  31 *
  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.
  42 */
  43
  44#define DRIVER_NAME "orinoco_pci"
  45#define PFX DRIVER_NAME ": "
  46
  47#include <linux/module.h>
  48#include <linux/kernel.h>
  49#include <linux/init.h>
  50#include <linux/delay.h>
  51#include <linux/pci.h>
  52
  53#include "orinoco.h"
  54#include "orinoco_pci.h"
  55
  56/* Offset of the COR register of the PCI card */
  57#define HERMES_PCI_COR          (0x26)
  58
  59/* Bitmask to reset the card */
  60#define HERMES_PCI_COR_MASK     (0x0080)
  61
  62/* Magic timeouts for doing the reset.
  63 * Those times are straight from wlan-ng, and it is claimed that they
  64 * are necessary. Alan will kill me. Take your time and grab a coffee. */
  65#define HERMES_PCI_COR_ONT      (250)           /* ms */
  66#define HERMES_PCI_COR_OFFT     (500)           /* ms */
  67#define HERMES_PCI_COR_BUSYT    (500)           /* ms */
  68
  69/*
  70 * Do a soft reset of the card using the Configuration Option Register
  71 * We need this to get going...
  72 * This is the part of the code that is strongly inspired from wlan-ng
  73 *
  74 * Note : This code is done with irq enabled. This mean that many
  75 * interrupts will occur while we are there. This is why we use the
  76 * jiffies to regulate time instead of a straight mdelay(). Usually we
  77 * need only around 245 iteration of the loop to do 250 ms delay.
  78 *
  79 * Note bis : Don't try to access HERMES_CMD during the reset phase.
  80 * It just won't work !
  81 */
  82static int orinoco_pci_cor_reset(struct orinoco_private *priv)
  83{
  84        struct hermes *hw = &priv->hw;
  85        unsigned long timeout;
  86        u16 reg;
  87
  88        /* Assert the reset until the card notices */
  89        hermes_write_regn(hw, PCI_COR, HERMES_PCI_COR_MASK);
  90        mdelay(HERMES_PCI_COR_ONT);
  91
  92        /* Give time for the card to recover from this hard effort */
  93        hermes_write_regn(hw, PCI_COR, 0x0000);
  94        mdelay(HERMES_PCI_COR_OFFT);
  95
  96        /* The card is ready when it's no longer busy */
  97        timeout = jiffies + msecs_to_jiffies(HERMES_PCI_COR_BUSYT);
  98        reg = hermes_read_regn(hw, CMD);
  99        while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
 100                mdelay(1);
 101                reg = hermes_read_regn(hw, CMD);
 102        }
 103
 104        /* Still busy? */
 105        if (reg & HERMES_CMD_BUSY) {
 106                printk(KERN_ERR PFX "Busy timeout\n");
 107                return -ETIMEDOUT;
 108        }
 109
 110        return 0;
 111}
 112
 113static int orinoco_pci_init_one(struct pci_dev *pdev,
 114                                const struct pci_device_id *ent)
 115{
 116        int err;
 117        struct orinoco_private *priv;
 118        struct orinoco_pci_card *card;
 119        void __iomem *hermes_io;
 120
 121        err = pci_enable_device(pdev);
 122        if (err) {
 123                printk(KERN_ERR PFX "Cannot enable PCI device\n");
 124                return err;
 125        }
 126
 127        err = pci_request_regions(pdev, DRIVER_NAME);
 128        if (err) {
 129                printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 130                goto fail_resources;
 131        }
 132
 133        hermes_io = pci_iomap(pdev, 0, 0);
 134        if (!hermes_io) {
 135                printk(KERN_ERR PFX "Cannot remap chipset registers\n");
 136                err = -EIO;
 137                goto fail_map_hermes;
 138        }
 139
 140        /* Allocate network device */
 141        priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
 142                                orinoco_pci_cor_reset, NULL);
 143        if (!priv) {
 144                printk(KERN_ERR PFX "Cannot allocate network device\n");
 145                err = -ENOMEM;
 146                goto fail_alloc;
 147        }
 148
 149        card = priv->card;
 150
 151        hermes_struct_init(&priv->hw, hermes_io, HERMES_32BIT_REGSPACING);
 152
 153        err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
 154                          DRIVER_NAME, priv);
 155        if (err) {
 156                printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 157                err = -EBUSY;
 158                goto fail_irq;
 159        }
 160
 161        err = orinoco_pci_cor_reset(priv);
 162        if (err) {
 163                printk(KERN_ERR PFX "Initial reset failed\n");
 164                goto fail;
 165        }
 166
 167        err = orinoco_init(priv);
 168        if (err) {
 169                printk(KERN_ERR PFX "orinoco_init() failed\n");
 170                goto fail;
 171        }
 172
 173        err = orinoco_if_add(priv, 0, 0, NULL);
 174        if (err) {
 175                printk(KERN_ERR PFX "orinoco_if_add() failed\n");
 176                goto fail_wiphy;
 177        }
 178
 179        pci_set_drvdata(pdev, priv);
 180
 181        return 0;
 182
 183 fail_wiphy:
 184        wiphy_unregister(priv_to_wiphy(priv));
 185 fail:
 186        free_irq(pdev->irq, priv);
 187
 188 fail_irq:
 189        free_orinocodev(priv);
 190
 191 fail_alloc:
 192        pci_iounmap(pdev, hermes_io);
 193
 194 fail_map_hermes:
 195        pci_release_regions(pdev);
 196
 197 fail_resources:
 198        pci_disable_device(pdev);
 199
 200        return err;
 201}
 202
 203static void orinoco_pci_remove_one(struct pci_dev *pdev)
 204{
 205        struct orinoco_private *priv = pci_get_drvdata(pdev);
 206
 207        orinoco_if_del(priv);
 208        wiphy_unregister(priv_to_wiphy(priv));
 209        free_irq(pdev->irq, priv);
 210        free_orinocodev(priv);
 211        pci_iounmap(pdev, priv->hw.iobase);
 212        pci_release_regions(pdev);
 213        pci_disable_device(pdev);
 214}
 215
 216static const struct pci_device_id orinoco_pci_id_table[] = {
 217        /* Intersil Prism 3 */
 218        {0x1260, 0x3872, PCI_ANY_ID, PCI_ANY_ID,},
 219        /* Intersil Prism 2.5 */
 220        {0x1260, 0x3873, PCI_ANY_ID, PCI_ANY_ID,},
 221        /* Samsung MagicLAN SWL-2210P */
 222        {0x167d, 0xa000, PCI_ANY_ID, PCI_ANY_ID,},
 223        {0,},
 224};
 225
 226MODULE_DEVICE_TABLE(pci, orinoco_pci_id_table);
 227
 228static struct pci_driver orinoco_pci_driver = {
 229        .name           = DRIVER_NAME,
 230        .id_table       = orinoco_pci_id_table,
 231        .probe          = orinoco_pci_init_one,
 232        .remove         = orinoco_pci_remove_one,
 233        .driver.pm      = &orinoco_pci_pm_ops,
 234};
 235
 236static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 237        " (Pavel Roskin <proski@gnu.org>,"
 238        " David Gibson <hermes@gibson.dropbear.id.au> &"
 239        " Jean Tourrilhes <jt@hpl.hp.com>)";
 240MODULE_AUTHOR("Pavel Roskin <proski@gnu.org> &"
 241              " David Gibson <hermes@gibson.dropbear.id.au>");
 242MODULE_DESCRIPTION("Driver for wireless LAN cards using direct PCI interface");
 243MODULE_LICENSE("Dual MPL/GPL");
 244
 245static int __init orinoco_pci_init(void)
 246{
 247        printk(KERN_DEBUG "%s\n", version);
 248        return pci_register_driver(&orinoco_pci_driver);
 249}
 250
 251static void __exit orinoco_pci_exit(void)
 252{
 253        pci_unregister_driver(&orinoco_pci_driver);
 254}
 255
 256module_init(orinoco_pci_init);
 257module_exit(orinoco_pci_exit);
 258