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 PCI-to-PCMCIA adapter used in
   5  * Nortel emobility, Symbol LA-4113 and Symbol LA-4123.
   6  *
   7  * Copyright (C) 2002 Tobias Hoffmann
   8  *           (C) 2003 Christoph Jungegger <disdos@traum404.de>
   9  *
  10  * Some of this code is borrowed from orinoco_plx.c
  11  *      Copyright (C) 2001 Daniel Barlow
  12  * Some of this code is borrowed from orinoco_pci.c
  13  *  Copyright (C) 2001 Jean Tourrilhes
  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  *
  18  * The contents of this file are subject to the Mozilla Public License
  19  * Version 1.1 (the "License"); you may not use this file except in
  20  * compliance with the License. You may obtain a copy of the License
  21  * at http://www.mozilla.org/MPL/
  22  *
  23  * Software distributed under the License is distributed on an "AS IS"
  24  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  25  * the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * Alternatively, the contents of this file may be used under the
  29  * terms of the GNU General Public License version 2 (the "GPL"), in
  30  * which case the provisions of the GPL are applicable instead of the
  31  * above.  If you wish to allow the use of your version of this file
  32  * only under the terms of the GPL and not to allow others to use your
  33  * version of this file under the MPL, indicate your decision by
  34  * deleting the provisions above and replace them with the notice and
  35  * other provisions required by the GPL.  If you do not delete the
  36  * provisions above, a recipient may use your version of this file
  37  * under either the MPL or the GPL.
  38  */
  39
  40 #define DRIVER_NAME "orinoco_nortel"
  41 #define PFX DRIVER_NAME ": "
  42
  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 #include "orinoco_pci.h"
  52
  53 #define COR_OFFSET    (0xe0)    /* COR attribute offset of Prism2 PC card */
  54 #define COR_VALUE     (COR_LEVEL_REQ | COR_FUNC_ENA)    /* Enable PC card with interrupt in level trigger */
  55
  56
  57 /*
  58  * Do a soft reset of the card using the Configuration Option Register
  59  * We need this to get going...
  60  * This is the part of the code that is strongly inspired from wlan-ng
  61  *
  62  * Note bis : Don't try to access HERMES_CMD during the reset phase.
  63  * It just won't work !
  64  */
  65 static int orinoco_nortel_cor_reset(struct orinoco_private *priv)
  66 {
  67         struct orinoco_pci_card *card = priv->card;
  68
  69         /* Assert the reset until the card notices */
  70         iowrite16(8, card->bridge_io + 2);
  71         ioread16(card->attr_io + COR_OFFSET);
  72         iowrite16(0x80, card->attr_io + COR_OFFSET);
  73         mdelay(1);
  74
  75         /* Give time for the card to recover from this hard effort */
  76         iowrite16(0, card->attr_io + COR_OFFSET);
  77         iowrite16(0, card->attr_io + COR_OFFSET);
  78         mdelay(1);
  79
  80         /* Set COR as usual */
  81         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
  82         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
  83         mdelay(1);
  84
  85         iowrite16(0x228, card->bridge_io + 2);
  86
  87         return 0;
  88 }
  89
  90 static int orinoco_nortel_hw_init(struct orinoco_pci_card *card)
  91 {
  92         int i;
  93         u32 reg;
  94
  95         /* Setup bridge */
  96         if (ioread16(card->bridge_io) & 1) {
  97                 printk(KERN_ERR PFX "brg1 answer1 wrong\n");
  98                 return -EBUSY;
  99         }
 100         iowrite16(0x118, card->bridge_io + 2);
 101         iowrite16(0x108, card->bridge_io + 2);
 102         mdelay(30);
 103         iowrite16(0x8, card->bridge_io + 2);
 104         for (i = 0; i < 30; i++) {
 105                 mdelay(30);
 106                 if (ioread16(card->bridge_io) & 0x10) {
 107                         break;
 108                 }
 109         }
 110         if (i == 30) {
 111                 printk(KERN_ERR PFX "brg1 timed out\n");
 112                 return -EBUSY;
 113         }
 114         if (ioread16(card->attr_io + COR_OFFSET) & 1) {
 115                 printk(KERN_ERR PFX "brg2 answer1 wrong\n");
 116                 return -EBUSY;
 117         }
 118         if (ioread16(card->attr_io + COR_OFFSET + 2) & 1) {
 119                 printk(KERN_ERR PFX "brg2 answer2 wrong\n");
 120                 return -EBUSY;
 121         }
 122         if (ioread16(card->attr_io + COR_OFFSET + 4) & 1) {
 123                 printk(KERN_ERR PFX "brg2 answer3 wrong\n");
 124                 return -EBUSY;
 125         }
 126
 127         /* Set the PCMCIA COR register */
 128         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
 129         mdelay(1);
 130         reg = ioread16(card->attr_io + COR_OFFSET);
 131         if (reg != COR_VALUE) {
 132                 printk(KERN_ERR PFX "Error setting COR value (reg=%x)\n",
 133                        reg);
 134                 return -EBUSY;
 135         }
 136
 137         /* Set LEDs */
 138         iowrite16(1, card->bridge_io + 10);
 139         return 0;
 140 }
 141
 142 static int orinoco_nortel_init_one(struct pci_dev *pdev,
 143                                    const struct pci_device_id *ent)
 144 {
 145         int err;
 146         struct orinoco_private *priv;
 147         struct orinoco_pci_card *card;
 148         struct net_device *dev;
 149         void __iomem *hermes_io, *bridge_io, *attr_io;
 150
 151         err = pci_enable_device(pdev);
 152         if (err) {
 153                 printk(KERN_ERR PFX "Cannot enable PCI device\n");
 154                 return err;
 155         }
 156
 157         err = pci_request_regions(pdev, DRIVER_NAME);
 158         if (err) {
 159                 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 160                 goto fail_resources;
 161         }
 162
 163         bridge_io = pci_iomap(pdev, 0, 0);
 164         if (!bridge_io) {
 165                 printk(KERN_ERR PFX "Cannot map bridge registers\n");
 166                 err = -EIO;
 167                 goto fail_map_bridge;
 168         }
 169
 170         attr_io = pci_iomap(pdev, 1, 0);
 171         if (!attr_io) {
 172                 printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n");
 173                 err = -EIO;
 174                 goto fail_map_attr;
 175         }
 176
 177         hermes_io = pci_iomap(pdev, 2, 0);
 178         if (!hermes_io) {
 179                 printk(KERN_ERR PFX "Cannot map chipset registers\n");
 180                 err = -EIO;
 181                 goto fail_map_hermes;
 182         }
 183
 184         /* Allocate network device */
 185         dev = alloc_orinocodev(sizeof(*card), orinoco_nortel_cor_reset);
 186         if (!dev) {
 187                 printk(KERN_ERR PFX "Cannot allocate network device\n");
 188                 err = -ENOMEM;
 189                 goto fail_alloc;
 190         }
 191
 192         priv = netdev_priv(dev);
 193         card = priv->card;
 194         card->bridge_io = bridge_io;
 195         card->attr_io = attr_io;
 196         SET_NETDEV_DEV(dev, &pdev->dev);
 197
 198         hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
 199
 200         err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
 201                           dev->name, dev);
 202         if (err) {
 203                 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 204                 err = -EBUSY;
 205                 goto fail_irq;
 206         }
 207
 208         err = orinoco_nortel_hw_init(card);
 209         if (err) {
 210                 printk(KERN_ERR PFX "Hardware initialization failed\n");
 211                 goto fail;
 212         }
 213
 214         err = orinoco_nortel_cor_reset(priv);
 215         if (err) {
 216                 printk(KERN_ERR PFX "Initial reset failed\n");
 217                 goto fail;
 218         }
 219
 220         err = register_netdev(dev);
 221         if (err) {
 222                 printk(KERN_ERR PFX "Cannot register network device\n");
 223                 goto fail;
 224         }
 225
 226         pci_set_drvdata(pdev, dev);
 227         printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
 228                pci_name(pdev));
 229
 230         return 0;
 231
 232  fail:
 233         free_irq(pdev->irq, dev);
 234
 235  fail_irq:
 236         pci_set_drvdata(pdev, NULL);
 237         free_orinocodev(dev);
 238
 239  fail_alloc:
 240         pci_iounmap(pdev, hermes_io);
 241
 242  fail_map_hermes:
 243         pci_iounmap(pdev, attr_io);
 244
 245  fail_map_attr:
 246         pci_iounmap(pdev, bridge_io);
 247
 248  fail_map_bridge:
 249         pci_release_regions(pdev);
 250
 251  fail_resources:
 252         pci_disable_device(pdev);
 253
 254         return err;
 255 }
 256
 257 static void __devexit orinoco_nortel_remove_one(struct pci_dev *pdev)
 258 {
 259         struct net_device *dev = pci_get_drvdata(pdev);
 260         struct orinoco_private *priv = netdev_priv(dev);
 261         struct orinoco_pci_card *card = priv->card;
 262
 263         /* Clear LEDs */
 264         iowrite16(0, card->bridge_io + 10);
 265
 266         unregister_netdev(dev);
 267         free_irq(pdev->irq, dev);
 268         pci_set_drvdata(pdev, NULL);
 269         free_orinocodev(dev);
 270         pci_iounmap(pdev, priv->hw.iobase);
 271         pci_iounmap(pdev, card->attr_io);
 272         pci_iounmap(pdev, card->bridge_io);
 273         pci_release_regions(pdev);
 274         pci_disable_device(pdev);
 275 }
 276
 277 static struct pci_device_id orinoco_nortel_id_table[] = {
 278         /* Nortel emobility PCI */
 279         {0x126c, 0x8030, PCI_ANY_ID, PCI_ANY_ID,},
 280         /* Symbol LA-4123 PCI */
 281         {0x1562, 0x0001, PCI_ANY_ID, PCI_ANY_ID,},
 282         {0,},
 283 };
 284
 285 MODULE_DEVICE_TABLE(pci, orinoco_nortel_id_table);
 286
 287 static struct pci_driver orinoco_nortel_driver = {
 288         .name           = DRIVER_NAME,
 289         .id_table       = orinoco_nortel_id_table,
 290         .probe          = orinoco_nortel_init_one,
 291         .remove         = __devexit_p(orinoco_nortel_remove_one),
 292         .suspend        = orinoco_pci_suspend,
 293         .resume         = orinoco_pci_resume,
 294 };
 295
 296 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 297         " (Tobias Hoffmann & Christoph Jungegger <disdos@traum404.de>)";
 298 MODULE_AUTHOR("Christoph Jungegger <disdos@traum404.de>");
 299 MODULE_DESCRIPTION
 300     ("Driver for wireless LAN cards using the Nortel PCI bridge");
 301 MODULE_LICENSE("Dual MPL/GPL");
 302
 303 static int __init orinoco_nortel_init(void)
 304 {
 305         printk(KERN_DEBUG "%s\n", version);
 306         return pci_register_driver(&orinoco_nortel_driver);
 307 }
 308
 309 static void __exit orinoco_nortel_exit(void)
 310 {
 311         pci_unregister_driver(&orinoco_nortel_driver);
 312 }
 313
 314 module_init(orinoco_nortel_init);
 315 module_exit(orinoco_nortel_exit);
 316
 317 /*
 318  * Local variables:
 319  *  c-indent-level: 8
 320  *  c-basic-offset: 8
 321  *  tab-width: 8
 322  * End:
 323  */