drivers/net/wireless/orinoco_nortel.c

   1 /* orinoco_nortel.c
   2  *
   3  * Driver for Prism II devices which would usually be driven by orinoco_cs,
   4  * but are connected to the PCI bus by a Nortel PCI-PCMCIA-Adapter.
   5  *
   6  * Copyright (C) 2002 Tobias Hoffmann
   7  *           (C) 2003 Christoph Jungegger <disdos@traum404.de>
   8  *
   9  * Some of this code is borrowed from orinoco_plx.c
  10  *      Copyright (C) 2001 Daniel Barlow
  11  * Some of this code is borrowed from orinoco_pci.c
  12  *  Copyright (C) 2001 Jean Tourrilhes
  13  * Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
  14  * has been copied from it. linux-wlan-ng-0.1.10 is originally :
  15  *      Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
  16  *
  17  * The contents of this file are subject to the Mozilla Public License
  18  * Version 1.1 (the "License"); you may not use this file except in
  19  * compliance with the License. You may obtain a copy of the License
  20  * at http://www.mozilla.org/MPL/
  21  *
  22  * Software distributed under the License is distributed on an "AS IS"
  23  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  24  * the License for the specific language governing rights and
  25  * limitations under the License.
  26  *
  27  * Alternatively, the contents of this file may be used under the
  28  * terms of the GNU General Public License version 2 (the "GPL"), in
  29  * which case the provisions of the GPL are applicable instead of the
  30  * above.  If you wish to allow the use of your version of this file
  31  * only under the terms of the GPL and not to allow others to use your
  32  * version of this file under the MPL, indicate your decision by
  33  * deleting the provisions above and replace them with the notice and
  34  * other provisions required by the GPL.  If you do not delete the
  35  * provisions above, a recipient may use your version of this file
  36  * under either the MPL or the GPL.
  37  */
  38
  39 #define DRIVER_NAME "orinoco_nortel"
  40 #define PFX DRIVER_NAME ": "
  41
  42 #include <linux/config.h>
  43 #include <linux/module.h>
  44 #include <linux/kernel.h>
  45 #include <linux/init.h>
  46 #include <linux/delay.h>
  47 #include <linux/pci.h>
  48 #include <pcmcia/cisreg.h>
  49
  50 #include "orinoco.h"
  51
  52 #define COR_OFFSET    (0xe0)    /* COR attribute offset of Prism2 PC card */
  53 #define COR_VALUE     (COR_LEVEL_REQ | COR_FUNC_ENA)    /* Enable PC card with interrupt in level trigger */
  54
  55
  56 /* Nortel specific data */
  57 struct nortel_pci_card {
  58         unsigned long iobase1;
  59         unsigned long iobase2;
  60 };
  61
  62 /*
  63  * Do a soft reset of the PCI card using the Configuration Option Register
  64  * We need this to get going...
  65  * This is the part of the code that is strongly inspired from wlan-ng
  66  *
  67  * Note bis : Don't try to access HERMES_CMD during the reset phase.
  68  * It just won't work !
  69  */
  70 static int nortel_pci_cor_reset(struct orinoco_private *priv)
  71 {
  72         struct nortel_pci_card *card = priv->card;
  73
  74         /* Assert the reset until the card notice */
  75         outw_p(8, card->iobase1 + 2);
  76         inw(card->iobase2 + COR_OFFSET);
  77         outw_p(0x80, card->iobase2 + COR_OFFSET);
  78         mdelay(1);
  79
  80         /* Give time for the card to recover from this hard effort */
  81         outw_p(0, card->iobase2 + COR_OFFSET);
  82         outw_p(0, card->iobase2 + COR_OFFSET);
  83         mdelay(1);
  84
  85         /* set COR as usual */
  86         outw_p(COR_VALUE, card->iobase2 + COR_OFFSET);
  87         outw_p(COR_VALUE, card->iobase2 + COR_OFFSET);
  88         mdelay(1);
  89
  90         outw_p(0x228, card->iobase1 + 2);
  91
  92         return 0;
  93 }
  94
  95 int nortel_pci_hw_init(struct nortel_pci_card *card)
  96 {
  97         int i;
  98         u32 reg;
  99
 100         /* setup bridge */
 101         if (inw(card->iobase1) & 1) {
 102                 printk(KERN_ERR PFX "brg1 answer1 wrong\n");
 103                 return -EBUSY;
 104         }
 105         outw_p(0x118, card->iobase1 + 2);
 106         outw_p(0x108, card->iobase1 + 2);
 107         mdelay(30);
 108         outw_p(0x8, card->iobase1 + 2);
 109         for (i = 0; i < 30; i++) {
 110                 mdelay(30);
 111                 if (inw(card->iobase1) & 0x10) {
 112                         break;
 113                 }
 114         }
 115         if (i == 30) {
 116                 printk(KERN_ERR PFX "brg1 timed out\n");
 117                 return -EBUSY;
 118         }
 119         if (inw(card->iobase2 + 0xe0) & 1) {
 120                 printk(KERN_ERR PFX "brg2 answer1 wrong\n");
 121                 return -EBUSY;
 122         }
 123         if (inw(card->iobase2 + 0xe2) & 1) {
 124                 printk(KERN_ERR PFX "brg2 answer2 wrong\n");
 125                 return -EBUSY;
 126         }
 127         if (inw(card->iobase2 + 0xe4) & 1) {
 128                 printk(KERN_ERR PFX "brg2 answer3 wrong\n");
 129                 return -EBUSY;
 130         }
 131
 132         /* set the PCMCIA COR-Register */
 133         outw_p(COR_VALUE, card->iobase2 + COR_OFFSET);
 134         mdelay(1);
 135         reg = inw(card->iobase2 + COR_OFFSET);
 136         if (reg != COR_VALUE) {
 137                 printk(KERN_ERR PFX "Error setting COR value (reg=%x)\n",
 138                        reg);
 139                 return -EBUSY;
 140         }
 141
 142         /* set leds */
 143         outw_p(1, card->iobase1 + 10);
 144         return 0;
 145 }
 146
 147 static int nortel_pci_init_one(struct pci_dev *pdev,
 148                                const struct pci_device_id *ent)
 149 {
 150         int err;
 151         struct orinoco_private *priv;
 152         struct nortel_pci_card *card;
 153         struct net_device *dev;
 154         void __iomem *iomem;
 155
 156         err = pci_enable_device(pdev);
 157         if (err) {
 158                 printk(KERN_ERR PFX "Cannot enable PCI device\n");
 159                 return err;
 160         }
 161
 162         err = pci_request_regions(pdev, DRIVER_NAME);
 163         if (err != 0) {
 164                 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 165                 goto fail_resources;
 166         }
 167
 168         iomem = pci_iomap(pdev, 3, 0);
 169         if (!iomem) {
 170                 err = -ENOMEM;
 171                 goto fail_map_io;
 172         }
 173
 174         /* Allocate network device */
 175         dev = alloc_orinocodev(sizeof(*card), nortel_pci_cor_reset);
 176         if (!dev) {
 177                 printk(KERN_ERR PFX "Cannot allocate network device\n");
 178                 err = -ENOMEM;
 179                 goto fail_alloc;
 180         }
 181
 182         priv = netdev_priv(dev);
 183         card = priv->card;
 184         card->iobase1 = pci_resource_start(pdev, 0);
 185         card->iobase2 = pci_resource_start(pdev, 1);
 186         dev->base_addr = pci_resource_start(pdev, 2);
 187         SET_MODULE_OWNER(dev);
 188         SET_NETDEV_DEV(dev, &pdev->dev);
 189
 190         hermes_struct_init(&priv->hw, iomem, HERMES_16BIT_REGSPACING);
 191
 192         printk(KERN_DEBUG PFX "Detected Nortel PCI device at %s irq:%d, "
 193                "io addr:0x%lx\n", pci_name(pdev), pdev->irq, dev->base_addr);
 194
 195         err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
 196                           dev->name, dev);
 197         if (err) {
 198                 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 199                 err = -EBUSY;
 200                 goto fail_irq;
 201         }
 202         dev->irq = pdev->irq;
 203
 204         err = nortel_pci_hw_init(card);
 205         if (err) {
 206                 printk(KERN_ERR PFX "Hardware initialization failed\n");
 207                 goto fail;
 208         }
 209
 210         err = nortel_pci_cor_reset(priv);
 211         if (err) {
 212                 printk(KERN_ERR PFX "Initial reset failed\n");
 213                 goto fail;
 214         }
 215
 216
 217         err = register_netdev(dev);
 218         if (err) {
 219                 printk(KERN_ERR PFX "Cannot register network device\n");
 220                 goto fail;
 221         }
 222
 223         pci_set_drvdata(pdev, dev);
 224
 225         return 0;
 226
 227  fail:
 228         free_irq(pdev->irq, dev);
 229
 230  fail_irq:
 231         pci_set_drvdata(pdev, NULL);
 232         free_orinocodev(dev);
 233
 234  fail_alloc:
 235         pci_iounmap(pdev, iomem);
 236
 237  fail_map_io:
 238         pci_release_regions(pdev);
 239
 240  fail_resources:
 241         pci_disable_device(pdev);
 242
 243         return err;
 244 }
 245
 246 static void __devexit nortel_pci_remove_one(struct pci_dev *pdev)
 247 {
 248         struct net_device *dev = pci_get_drvdata(pdev);
 249         struct orinoco_private *priv = netdev_priv(dev);
 250         struct nortel_pci_card *card = priv->card;
 251
 252         /* clear leds */
 253         outw_p(0, card->iobase1 + 10);
 254
 255         unregister_netdev(dev);
 256         free_irq(dev->irq, dev);
 257         pci_set_drvdata(pdev, NULL);
 258         free_orinocodev(dev);
 259         pci_iounmap(pdev, priv->hw.iobase);
 260         pci_release_regions(pdev);
 261         pci_disable_device(pdev);
 262 }
 263
 264
 265 static struct pci_device_id nortel_pci_id_table[] = {
 266         /* Nortel emobility PCI */
 267         {0x126c, 0x8030, PCI_ANY_ID, PCI_ANY_ID,},
 268         {0,},
 269 };
 270
 271 MODULE_DEVICE_TABLE(pci, nortel_pci_id_table);
 272
 273 static struct pci_driver nortel_pci_driver = {
 274         .name = DRIVER_NAME,
 275         .id_table = nortel_pci_id_table,
 276         .probe = nortel_pci_init_one,
 277         .remove = __devexit_p(nortel_pci_remove_one),
 278 };
 279
 280 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 281         " (Tobias Hoffmann & Christoph Jungegger <disdos@traum404.de>)";
 282 MODULE_AUTHOR("Christoph Jungegger <disdos@traum404.de>");
 283 MODULE_DESCRIPTION
 284     ("Driver for wireless LAN cards using the Nortel PCI bridge");
 285 MODULE_LICENSE("Dual MPL/GPL");
 286
 287 static int __init nortel_pci_init(void)
 288 {
 289         printk(KERN_DEBUG "%s\n", version);
 290         return pci_module_init(&nortel_pci_driver);
 291 }
 292
 293 static void __exit nortel_pci_exit(void)
 294 {
 295         pci_unregister_driver(&nortel_pci_driver);
 296         ssleep(1);
 297 }
 298
 299 module_init(nortel_pci_init);
 300 module_exit(nortel_pci_exit);
 301
 302 /*
 303  * Local variables:
 304  *  c-indent-level: 8
 305  *  c-basic-offset: 8
 306  *  tab-width: 8
 307  * End:
 308  */