drivers/net/wireless/orinoco_tmd.c

   1 /* orinoco_tmd.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 TMD7160.
   5  *
   6  * Copyright (C) 2003 Joerg Dorchain <joerg AT dorchain.net>
   7  * based heavily upon orinoco_plx.c Copyright (C) 2001 Daniel Barlow
   8  *
   9  * The contents of this file are subject to the Mozilla Public License
  10  * Version 1.1 (the "License"); you may not use this file except in
  11  * compliance with the License. You may obtain a copy of the License
  12  * at http://www.mozilla.org/MPL/
  13  *
  14  * Software distributed under the License is distributed on an "AS IS"
  15  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  16  * the License for the specific language governing rights and
  17  * limitations under the License.
  18  *
  19  * Alternatively, the contents of this file may be used under the
  20  * terms of the GNU General Public License version 2 (the "GPL"), in
  21  * which case the provisions of the GPL are applicable instead of the
  22  * above.  If you wish to allow the use of your version of this file
  23  * only under the terms of the GPL and not to allow others to use your
  24  * version of this file under the MPL, indicate your decision by
  25  * deleting the provisions above and replace them with the notice and
  26  * other provisions required by the GPL.  If you do not delete the
  27  * provisions above, a recipient may use your version of this file
  28  * under either the MPL or the GPL.
  29  *
  30  * The actual driving is done by orinoco.c, this is just resource
  31  * allocation stuff.
  32  *
  33  * This driver is modeled after the orinoco_plx driver. The main
  34  * difference is that the TMD chip has only IO port ranges and doesn't
  35  * provide access to the PCMCIA attribute space.
  36  *
  37  * Pheecom sells cards with the TMD chip as "ASIC version"
  38  */
  39
  40 #define DRIVER_NAME "orinoco_tmd"
  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_VALUE       (COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */
  54 #define COR_RESET     (0x80)    /* reset bit in the COR register */
  55 #define TMD_RESET_TIME  (500)   /* milliseconds */
  56
  57 /*
  58  * Do a soft reset of the card using the Configuration Option Register
  59  */
  60 static int orinoco_tmd_cor_reset(struct orinoco_private *priv)
  61 {
  62         hermes_t *hw = &priv->hw;
  63         struct orinoco_pci_card *card = priv->card;
  64         unsigned long timeout;
  65         u16 reg;
  66
  67         iowrite8(COR_VALUE | COR_RESET, card->bridge_io);
  68         mdelay(1);
  69
  70         iowrite8(COR_VALUE, card->bridge_io);
  71         mdelay(1);
  72
  73         /* Just in case, wait more until the card is no longer busy */
  74         timeout = jiffies + (TMD_RESET_TIME * HZ / 1000);
  75         reg = hermes_read_regn(hw, CMD);
  76         while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
  77                 mdelay(1);
  78                 reg = hermes_read_regn(hw, CMD);
  79         }
  80
  81         /* Still busy? */
  82         if (reg & HERMES_CMD_BUSY) {
  83                 printk(KERN_ERR PFX "Busy timeout\n");
  84                 return -ETIMEDOUT;
  85         }
  86
  87         return 0;
  88 }
  89
  90
  91 static int orinoco_tmd_init_one(struct pci_dev *pdev,
  92                                 const struct pci_device_id *ent)
  93 {
  94         int err;
  95         struct orinoco_private *priv;
  96         struct orinoco_pci_card *card;
  97         struct net_device *dev;
  98         void __iomem *hermes_io, *bridge_io;
  99
 100         err = pci_enable_device(pdev);
 101         if (err) {
 102                 printk(KERN_ERR PFX "Cannot enable PCI device\n");
 103                 return err;
 104         }
 105
 106         err = pci_request_regions(pdev, DRIVER_NAME);
 107         if (err) {
 108                 printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
 109                 goto fail_resources;
 110         }
 111
 112         bridge_io = pci_iomap(pdev, 1, 0);
 113         if (!bridge_io) {
 114                 printk(KERN_ERR PFX "Cannot map bridge registers\n");
 115                 err = -EIO;
 116                 goto fail_map_bridge;
 117         }
 118
 119         hermes_io = pci_iomap(pdev, 2, 0);
 120         if (!hermes_io) {
 121                 printk(KERN_ERR PFX "Cannot map chipset registers\n");
 122                 err = -EIO;
 123                 goto fail_map_hermes;
 124         }
 125
 126         /* Allocate network device */
 127         dev = alloc_orinocodev(sizeof(*card), orinoco_tmd_cor_reset);
 128         if (!dev) {
 129                 printk(KERN_ERR PFX "Cannot allocate network device\n");
 130                 err = -ENOMEM;
 131                 goto fail_alloc;
 132         }
 133
 134         priv = netdev_priv(dev);
 135         card = priv->card;
 136         card->bridge_io = bridge_io;
 137         SET_NETDEV_DEV(dev, &pdev->dev);
 138
 139         hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);
 140
 141         err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
 142                           dev->name, dev);
 143         if (err) {
 144                 printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
 145                 err = -EBUSY;
 146                 goto fail_irq;
 147         }
 148
 149         err = orinoco_tmd_cor_reset(priv);
 150         if (err) {
 151                 printk(KERN_ERR PFX "Initial reset failed\n");
 152                 goto fail;
 153         }
 154
 155         err = register_netdev(dev);
 156         if (err) {
 157                 printk(KERN_ERR PFX "Cannot register network device\n");
 158                 goto fail;
 159         }
 160
 161         pci_set_drvdata(pdev, dev);
 162         printk(KERN_DEBUG "%s: " DRIVER_NAME " at %s\n", dev->name,
 163                pci_name(pdev));
 164
 165         return 0;
 166
 167  fail:
 168         free_irq(pdev->irq, dev);
 169
 170  fail_irq:
 171         pci_set_drvdata(pdev, NULL);
 172         free_orinocodev(dev);
 173
 174  fail_alloc:
 175         pci_iounmap(pdev, hermes_io);
 176
 177  fail_map_hermes:
 178         pci_iounmap(pdev, bridge_io);
 179
 180  fail_map_bridge:
 181         pci_release_regions(pdev);
 182
 183  fail_resources:
 184         pci_disable_device(pdev);
 185
 186         return err;
 187 }
 188
 189 static void __devexit orinoco_tmd_remove_one(struct pci_dev *pdev)
 190 {
 191         struct net_device *dev = pci_get_drvdata(pdev);
 192         struct orinoco_private *priv = netdev_priv(dev);
 193         struct orinoco_pci_card *card = priv->card;
 194
 195         unregister_netdev(dev);
 196         free_irq(pdev->irq, dev);
 197         pci_set_drvdata(pdev, NULL);
 198         free_orinocodev(dev);
 199         pci_iounmap(pdev, priv->hw.iobase);
 200         pci_iounmap(pdev, card->bridge_io);
 201         pci_release_regions(pdev);
 202         pci_disable_device(pdev);
 203 }
 204
 205 static struct pci_device_id orinoco_tmd_id_table[] = {
 206         {0x15e8, 0x0131, PCI_ANY_ID, PCI_ANY_ID,},      /* NDC and OEMs, e.g. pheecom */
 207         {0,},
 208 };
 209
 210 MODULE_DEVICE_TABLE(pci, orinoco_tmd_id_table);
 211
 212 static struct pci_driver orinoco_tmd_driver = {
 213         .name           = DRIVER_NAME,
 214         .id_table       = orinoco_tmd_id_table,
 215         .probe          = orinoco_tmd_init_one,
 216         .remove         = __devexit_p(orinoco_tmd_remove_one),
 217         .suspend        = orinoco_pci_suspend,
 218         .resume         = orinoco_pci_resume,
 219 };
 220
 221 static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
 222         " (Joerg Dorchain <joerg@dorchain.net>)";
 223 MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
 224 MODULE_DESCRIPTION("Driver for wireless LAN cards using the TMD7160 PCI bridge");
 225 MODULE_LICENSE("Dual MPL/GPL");
 226
 227 static int __init orinoco_tmd_init(void)
 228 {
 229         printk(KERN_DEBUG "%s\n", version);
 230         return pci_register_driver(&orinoco_tmd_driver);
 231 }
 232
 233 static void __exit orinoco_tmd_exit(void)
 234 {
 235         pci_unregister_driver(&orinoco_tmd_driver);
 236 }
 237
 238 module_init(orinoco_tmd_init);
 239 module_exit(orinoco_tmd_exit);
 240
 241 /*
 242  * Local variables:
 243  *  c-indent-level: 8
 244  *  c-basic-offset: 8
 245  *  tab-width: 8
 246  * End:
 247  */