intersil/orinoco/orinoco_nortel.c

0001 /* orinoco_nortel.c
0002  *
0003  * Driver for Prism II devices which would usually be driven by orinoco_cs,
0004  * but are connected to the PCI bus by a PCI-to-PCMCIA adapter used in
0005  * Nortel emobility, Symbol LA-4113 and Symbol LA-4123.
0006  *
0007  * Copyright (C) 2002 Tobias Hoffmann
0008  *           (C) 2003 Christoph Jungegger <disdos@traum404.de>
0009  *
0010  * Some of this code is borrowed from orinoco_plx.c
0011  *  Copyright (C) 2001 Daniel Barlow
0012  * Some of this code is borrowed from orinoco_pci.c
0013  *  Copyright (C) 2001 Jean Tourrilhes
0014  * Some of this code is "inspired" by linux-wlan-ng-0.1.10, but nothing
0015  * has been copied from it. linux-wlan-ng-0.1.10 is originally :
0016  *  Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
0017  *
0018  * The contents of this file are subject to the Mozilla Public License
0019  * Version 1.1 (the "License"); you may not use this file except in
0020  * compliance with the License. You may obtain a copy of the License
0021  * at http://www.mozilla.org/MPL/
0022  *
0023  * Software distributed under the License is distributed on an "AS IS"
0024  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
0025  * the License for the specific language governing rights and
0026  * limitations under the License.
0027  *
0028  * Alternatively, the contents of this file may be used under the
0029  * terms of the GNU General Public License version 2 (the "GPL"), in
0030  * which case the provisions of the GPL are applicable instead of the
0031  * above.  If you wish to allow the use of your version of this file
0032  * only under the terms of the GPL and not to allow others to use your
0033  * version of this file under the MPL, indicate your decision by
0034  * deleting the provisions above and replace them with the notice and
0035  * other provisions required by the GPL.  If you do not delete the
0036  * provisions above, a recipient may use your version of this file
0037  * under either the MPL or the GPL.
0038  */
0039
0040 #define DRIVER_NAME "orinoco_nortel"
0041 #define PFX DRIVER_NAME ": "
0042
0043 #include <linux/module.h>
0044 #include <linux/kernel.h>
0045 #include <linux/init.h>
0046 #include <linux/delay.h>
0047 #include <linux/pci.h>
0048 #include <pcmcia/cisreg.h>
0049
0050 #include "orinoco.h"
0051 #include "orinoco_pci.h"
0052
0053 #define COR_OFFSET    (0xe0)    /* COR attribute offset of Prism2 PC card */
0054 #define COR_VALUE     (COR_LEVEL_REQ | COR_FUNC_ENA)    /* Enable PC card with interrupt in level trigger */
0055
0056
0057 /*
0058  * Do a soft reset of the card using the Configuration Option Register
0059  * We need this to get going...
0060  * This is the part of the code that is strongly inspired from wlan-ng
0061  *
0062  * Note bis : Don't try to access HERMES_CMD during the reset phase.
0063  * It just won't work !
0064  */
0065 static int orinoco_nortel_cor_reset(struct orinoco_private *priv)
0066 {
0067     struct orinoco_pci_card *card = priv->card;
0068
0069     /* Assert the reset until the card notices */
0070     iowrite16(8, card->bridge_io + 2);
0071     ioread16(card->attr_io + COR_OFFSET);
0072     iowrite16(0x80, card->attr_io + COR_OFFSET);
0073     mdelay(1);
0074
0075     /* Give time for the card to recover from this hard effort */
0076     iowrite16(0, card->attr_io + COR_OFFSET);
0077     iowrite16(0, card->attr_io + COR_OFFSET);
0078     mdelay(1);
0079
0080     /* Set COR as usual */
0081     iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
0082     iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
0083     mdelay(1);
0084
0085     iowrite16(0x228, card->bridge_io + 2);
0086
0087     return 0;
0088 }
0089
0090 static int orinoco_nortel_hw_init(struct orinoco_pci_card *card)
0091 {
0092     int i;
0093     u32 reg;
0094
0095     /* Setup bridge */
0096     if (ioread16(card->bridge_io) & 1) {
0097         printk(KERN_ERR PFX "brg1 answer1 wrong\n");
0098         return -EBUSY;
0099     }
0100     iowrite16(0x118, card->bridge_io + 2);
0101     iowrite16(0x108, card->bridge_io + 2);
0102     mdelay(30);
0103     iowrite16(0x8, card->bridge_io + 2);
0104     for (i = 0; i < 30; i++) {
0105         mdelay(30);
0106         if (ioread16(card->bridge_io) & 0x10)
0107             break;
0108     }
0109     if (i == 30) {
0110         printk(KERN_ERR PFX "brg1 timed out\n");
0111         return -EBUSY;
0112     }
0113     if (ioread16(card->attr_io + COR_OFFSET) & 1) {
0114         printk(KERN_ERR PFX "brg2 answer1 wrong\n");
0115         return -EBUSY;
0116     }
0117     if (ioread16(card->attr_io + COR_OFFSET + 2) & 1) {
0118         printk(KERN_ERR PFX "brg2 answer2 wrong\n");
0119         return -EBUSY;
0120     }
0121     if (ioread16(card->attr_io + COR_OFFSET + 4) & 1) {
0122         printk(KERN_ERR PFX "brg2 answer3 wrong\n");
0123         return -EBUSY;
0124     }
0125
0126     /* Set the PCMCIA COR register */
0127     iowrite16(COR_VALUE, card->attr_io + COR_OFFSET);
0128     mdelay(1);
0129     reg = ioread16(card->attr_io + COR_OFFSET);
0130     if (reg != COR_VALUE) {
0131         printk(KERN_ERR PFX "Error setting COR value (reg=%x)\n",
0132                reg);
0133         return -EBUSY;
0134     }
0135
0136     /* Set LEDs */
0137     iowrite16(1, card->bridge_io + 10);
0138     return 0;
0139 }
0140
0141 static int orinoco_nortel_init_one(struct pci_dev *pdev,
0142                    const struct pci_device_id *ent)
0143 {
0144     int err;
0145     struct orinoco_private *priv;
0146     struct orinoco_pci_card *card;
0147     void __iomem *hermes_io, *bridge_io, *attr_io;
0148
0149     err = pci_enable_device(pdev);
0150     if (err) {
0151         printk(KERN_ERR PFX "Cannot enable PCI device\n");
0152         return err;
0153     }
0154
0155     err = pci_request_regions(pdev, DRIVER_NAME);
0156     if (err) {
0157         printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
0158         goto fail_resources;
0159     }
0160
0161     bridge_io = pci_iomap(pdev, 0, 0);
0162     if (!bridge_io) {
0163         printk(KERN_ERR PFX "Cannot map bridge registers\n");
0164         err = -EIO;
0165         goto fail_map_bridge;
0166     }
0167
0168     attr_io = pci_iomap(pdev, 1, 0);
0169     if (!attr_io) {
0170         printk(KERN_ERR PFX "Cannot map PCMCIA attributes\n");
0171         err = -EIO;
0172         goto fail_map_attr;
0173     }
0174
0175     hermes_io = pci_iomap(pdev, 2, 0);
0176     if (!hermes_io) {
0177         printk(KERN_ERR PFX "Cannot map chipset registers\n");
0178         err = -EIO;
0179         goto fail_map_hermes;
0180     }
0181
0182     /* Allocate network device */
0183     priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
0184                 orinoco_nortel_cor_reset, NULL);
0185     if (!priv) {
0186         printk(KERN_ERR PFX "Cannot allocate network device\n");
0187         err = -ENOMEM;
0188         goto fail_alloc;
0189     }
0190
0191     card = priv->card;
0192     card->bridge_io = bridge_io;
0193     card->attr_io = attr_io;
0194
0195     hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
0196
0197     err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
0198               DRIVER_NAME, priv);
0199     if (err) {
0200         printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
0201         err = -EBUSY;
0202         goto fail_irq;
0203     }
0204
0205     err = orinoco_nortel_hw_init(card);
0206     if (err) {
0207         printk(KERN_ERR PFX "Hardware initialization failed\n");
0208         goto fail;
0209     }
0210
0211     err = orinoco_nortel_cor_reset(priv);
0212     if (err) {
0213         printk(KERN_ERR PFX "Initial reset failed\n");
0214         goto fail;
0215     }
0216
0217     err = orinoco_init(priv);
0218     if (err) {
0219         printk(KERN_ERR PFX "orinoco_init() failed\n");
0220         goto fail;
0221     }
0222
0223     err = orinoco_if_add(priv, 0, 0, NULL);
0224     if (err) {
0225         printk(KERN_ERR PFX "orinoco_if_add() failed\n");
0226         goto fail_wiphy;
0227     }
0228
0229     pci_set_drvdata(pdev, priv);
0230
0231     return 0;
0232
0233  fail_wiphy:
0234     wiphy_unregister(priv_to_wiphy(priv));
0235  fail:
0236     free_irq(pdev->irq, priv);
0237
0238  fail_irq:
0239     free_orinocodev(priv);
0240
0241  fail_alloc:
0242     pci_iounmap(pdev, hermes_io);
0243
0244  fail_map_hermes:
0245     pci_iounmap(pdev, attr_io);
0246
0247  fail_map_attr:
0248     pci_iounmap(pdev, bridge_io);
0249
0250  fail_map_bridge:
0251     pci_release_regions(pdev);
0252
0253  fail_resources:
0254     pci_disable_device(pdev);
0255
0256     return err;
0257 }
0258
0259 static void orinoco_nortel_remove_one(struct pci_dev *pdev)
0260 {
0261     struct orinoco_private *priv = pci_get_drvdata(pdev);
0262     struct orinoco_pci_card *card = priv->card;
0263
0264     /* Clear LEDs */
0265     iowrite16(0, card->bridge_io + 10);
0266
0267     orinoco_if_del(priv);
0268     wiphy_unregister(priv_to_wiphy(priv));
0269     free_irq(pdev->irq, priv);
0270     free_orinocodev(priv);
0271     pci_iounmap(pdev, priv->hw.iobase);
0272     pci_iounmap(pdev, card->attr_io);
0273     pci_iounmap(pdev, card->bridge_io);
0274     pci_release_regions(pdev);
0275     pci_disable_device(pdev);
0276 }
0277
0278 static const struct pci_device_id orinoco_nortel_id_table[] = {
0279     /* Nortel emobility PCI */
0280     {0x126c, 0x8030, PCI_ANY_ID, PCI_ANY_ID,},
0281     /* Symbol LA-4123 PCI */
0282     {0x1562, 0x0001, PCI_ANY_ID, PCI_ANY_ID,},
0283     {0,},
0284 };
0285
0286 MODULE_DEVICE_TABLE(pci, orinoco_nortel_id_table);
0287
0288 static struct pci_driver orinoco_nortel_driver = {
0289     .name       = DRIVER_NAME,
0290     .id_table   = orinoco_nortel_id_table,
0291     .probe      = orinoco_nortel_init_one,
0292     .remove     = orinoco_nortel_remove_one,
0293     .driver.pm  = &orinoco_pci_pm_ops,
0294 };
0295
0296 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
0297     " (Tobias Hoffmann & Christoph Jungegger <disdos@traum404.de>)";
0298 MODULE_AUTHOR("Christoph Jungegger <disdos@traum404.de>");
0299 MODULE_DESCRIPTION("Driver for wireless LAN cards using the Nortel PCI bridge");
0300 MODULE_LICENSE("Dual MPL/GPL");
0301
0302 static int __init orinoco_nortel_init(void)
0303 {
0304     printk(KERN_DEBUG "%s\n", version);
0305     return pci_register_driver(&orinoco_nortel_driver);
0306 }
0307
0308 static void __exit orinoco_nortel_exit(void)
0309 {
0310     pci_unregister_driver(&orinoco_nortel_driver);
0311 }
0312
0313 module_init(orinoco_nortel_init);
0314 module_exit(orinoco_nortel_exit);