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/config.h>
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/init.h>
  47 #include <linux/delay.h>
  48 #include <linux/pci.h>
  49 #include <pcmcia/cisreg.h>
  50
  51 #include "orinoco.h"
  52 #include "orinoco_pci.h"
  53
  54 #define COR_OFFSET    (0xe0)    /* COR attribute offset of Prism2 PC card */
  55 #define COR_VALUE     (COR_LEVEL_REQ | COR_FUNC_ENA)    /* Enable PC card with interrupt in level trigger */
  56
  57
  58 /*
  59  * Do a soft reset of the card using the Configuration Option Register
  60  * We need this to get going...
  61  * This is the part of the code that is strongly inspired from wlan-ng
  62  *
  63  * Note bis : Don't try to access HERMES_CMD during the reset phase.
  64  * It just won't work !
  65  */
  66 static int orinoco_nortel_cor_reset(struct orinoco_private *priv)
  67 {
  68         struct orinoco_pci_card *card = priv->card;
  69
  70         /* Assert the reset until the card notices */
  71         iowrite16(8, card->bridge_io + 2);
  72         ioread16(card->attr_io + COR_OFFSET);
  73         iowrite16(0x80, card->attr_io + COR_OFFSET);
  74         mdelay(1);
  75
  76         /* Give time for the card to recover from this hard effort */
  77         iowrite16(0, card->attr_io + COR_OFFSET);
  78         iowrite16(0, card->attr_io + COR_OFFSET);
  79         mdelay(1);
  80
  81         /* Set COR as usual */
  82         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
  83         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
  84         mdelay(1);
  85
  86         iowrite16(0x228, card->bridge_io + 2);
  87
  88         return 0;
  89 }
  90
  91 static int orinoco_nortel_hw_init(struct orinoco_pci_card *card)
  92 {
  93         int i;
  94         u32 reg;
  95
  96         /* Setup bridge */
  97         if (ioread16(card->bridge_io) & 1) {
  98                 printk(KERN_ERR PFX "brg1 answer1 wrong\n");
  99                 return -EBUSY;
 100         }
 101         iowrite16(0x118, card->bridge_io + 2);
 102         iowrite16(0x108, card->bridge_io + 2);
 103         mdelay(30);
 104         iowrite16(0x8, card->bridge_io + 2);
 105         for (i = 0; i < 30; i++) {
 106                 mdelay(30);
 107                 if (ioread16(card->bridge_io) & 0x10) {
 108                         break;
 109                 }
 110         }
 111         if (i == 30) {
 112                 printk(KERN_ERR PFX "brg1 timed out\n");
 113                 return -EBUSY;
 114         }
 115         if (ioread16(card->attr_io + COR_OFFSET) & 1) {
 116                 printk(KERN_ERR PFX "brg2 answer1 wrong\n");
 117                 return -EBUSY;
 118         }
 119         if (ioread16(card->attr_io + COR_OFFSET + 2) & 1) {
 120                 printk(KERN_ERR PFX "brg2 answer2 wrong\n");
 121                 return -EBUSY;
 122         }
 123         if (ioread16(card->attr_io + COR_OFFSET + 4) & 1) {
 124                 printk(KERN_ERR PFX "brg2 answer3 wrong\n");
 125                 return -EBUSY;
 126         }
 127
 128         /* Set the PCMCIA COR register */
 129         iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
 130         mdelay(1);
 131         reg = ioread16(card->attr_io + COR_OFFSET);
 132         if (reg != COR_VALUE) {
 133                 printk(KERN_ERR PFX "Error setting COR value (reg=%x)\n",
 134                        reg);
 135                 return -EBUSY;
 136         }
 137
 138         /* Set LEDs */
 139         iowrite16(1, card->bridge_io + 10);
 140         return 0;
 141 }
 142
 143 static int orinoco_nortel_init_one(struct pci_dev *pdev,
 144                                    const struct pci_device_id *ent)
 145 {
 146         int err;
 147         struct orinoco_private *priv;
 148         struct orinoco_pci_card *card;
 149         struct net_device *dev;
 150         void __iomem *hermes_io, *bridge_io, *attr_io;
 151
 152         err = pci_enable_device(pdev);
 153         if (err) {
 154                 printk(KERN_ERR PFX "Cannot enable PCI device\n");
 155                 return err;
 156         }
 157
 158         err = pci_request_regions(pdev, DRIVER_NAME);
 159         if (err) {
 160                 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 161                 goto fail_resources;
 162         }
 163
 164         bridge_io = pci_iomap(pdev, 0, 0);
 165         if (!bridge_io) {
 166                 printk(KERN_ERR PFX "Cannot map bridge registers\n");
 167                 err = -EIO;
 168                 goto fail_map_bridge;
 169         }
 170
 171         attr_io = pci_iomap(pdev, 1, 0);
 172         if (!attr_io) {
 173                 printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n");
 174                 err = -EIO;
 175                 goto fail_map_attr;
 176         }
 177
 178         hermes_io = pci_iomap(pdev, 2, 0);
 179         if (!hermes_io) {
 180                 printk(KERN_ERR PFX "Cannot map chipset registers\n");
 181                 err = -EIO;
 182                 goto fail_map_hermes;
 183         }
 184
 185         /* Allocate network device */
 186         dev = alloc_orinocodev(sizeof(*card), orinoco_nortel_cor_reset);
 187         if (!dev) {
 188                 printk(KERN_ERR PFX "Cannot allocate network device\n");
 189                 err = -ENOMEM;
 190                 goto fail_alloc;
 191         }
 192
 193         priv = netdev_priv(dev);
 194         card = priv->card;
 195         card->bridge_io = bridge_io;
 196         card->attr_io = attr_io;
 197         SET_MODULE_OWNER(dev);
 198         SET_NETDEV_DEV(dev, &pdev->dev);
 199
 200         hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
 201
 202         err = request_irq(pdev->irq, orinoco_interrupt, SA_SHIRQ,
 203                           dev->name, dev);
 204         if (err) {
 205                 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 206                 err = -EBUSY;
 207                 goto fail_irq;
 208         }
 209
 210         err = orinoco_nortel_hw_init(card);
 211         if (err) {
 212                 printk(KERN_ERR PFX "Hardware initialization failed\n");
 213                 goto fail;
 214         }
 215
 216         err = orinoco_nortel_cor_reset(priv);
 217         if (err) {
 218                 printk(KERN_ERR PFX "Initial reset failed\n");
 219                 goto fail;
 220         }
 221
 222         err = register_netdev(dev);
 223         if (err) {
 224                 printk(KERN_ERR PFX "Cannot register network device\n");
 225                 goto fail;
 226         }
 227
 228         pci_set_drvdata(pdev, dev);
 229         printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
 230                pci_name(pdev));
 231
 232         return 0;
 233
 234  fail:
 235         free_irq(pdev->irq, dev);
 236
 237  fail_irq:
 238         pci_set_drvdata(pdev, NULL);
 239         free_orinocodev(dev);
 240
 241  fail_alloc:
 242         pci_iounmap(pdev, hermes_io);
 243
 244  fail_map_hermes:
 245         pci_iounmap(pdev, attr_io);
 246
 247  fail_map_attr:
 248         pci_iounmap(pdev, bridge_io);
 249
 250  fail_map_bridge:
 251         pci_release_regions(pdev);
 252
 253  fail_resources:
 254         pci_disable_device(pdev);
 255
 256         return err;
 257 }
 258
 259 static void __devexit orinoco_nortel_remove_one(struct pci_dev *pdev)
 260 {
 261         struct net_device *dev = pci_get_drvdata(pdev);
 262         struct orinoco_private *priv = netdev_priv(dev);
 263         struct orinoco_pci_card *card = priv->card;
 264
 265         /* Clear LEDs */
 266         iowrite16(0, card->bridge_io + 10);
 267
 268         unregister_netdev(dev);
 269         free_irq(pdev->irq, dev);
 270         pci_set_drvdata(pdev, NULL);
 271         free_orinocodev(dev);
 272         pci_iounmap(pdev, priv->hw.iobase);
 273         pci_iounmap(pdev, card->attr_io);
 274         pci_iounmap(pdev, card->bridge_io);
 275         pci_release_regions(pdev);
 276         pci_disable_device(pdev);
 277 }
 278
 279 static struct pci_device_id orinoco_nortel_id_table[] = {
 280         /* Nortel emobility PCI */
 281         {0x126c, 0x8030, PCI_ANY_ID, PCI_ANY_ID,},
 282         /* Symbol LA-4123 PCI */
 283         {0x1562, 0x0001, PCI_ANY_ID, PCI_ANY_ID,},
 284         {0,},
 285 };
 286
 287 MODULE_DEVICE_TABLE(pci, orinoco_nortel_id_table);
 288
 289 static struct pci_driver orinoco_nortel_driver = {
 290         .name           = DRIVER_NAME,
 291         .id_table       = orinoco_nortel_id_table,
 292         .probe          = orinoco_nortel_init_one,
 293         .remove         = __devexit_p(orinoco_nortel_remove_one),
 294         .suspend        = orinoco_pci_suspend,
 295         .resume         = orinoco_pci_resume,
 296 };
 297
 298 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 299         " (Tobias Hoffmann & Christoph Jungegger <disdos@traum404.de>)";
 300 MODULE_AUTHOR("Christoph Jungegger <disdos@traum404.de>");
 301 MODULE_DESCRIPTION
 302     ("Driver for wireless LAN cards using the Nortel PCI bridge");
 303 MODULE_LICENSE("Dual MPL/GPL");
 304
 305 static int __init orinoco_nortel_init(void)
 306 {
 307         printk(KERN_DEBUG "%s\n", version);
 308         return pci_module_init(&orinoco_nortel_driver);
 309 }
 310
 311 static void __exit orinoco_nortel_exit(void)
 312 {
 313         pci_unregister_driver(&orinoco_nortel_driver);
 314 }
 315
 316 module_init(orinoco_nortel_init);
 317 module_exit(orinoco_nortel_exit);
 318
 319 /*
 320  * Local variables:
 321  *  c-indent-level: 8
 322  *  c-basic-offset: 8
 323  *  tab-width: 8
 324  * End:
 325  */