release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/comedi/drivers/adl_pci7296.c

   1 /*
   2     comedi/drivers/adl_pci7296.c
   3
   4     COMEDI - Linux Control and Measurement Device Interface
   5     Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20
  21 */
  22 /*
  23 Driver: adl_pci7296
  24 Description: Driver for the Adlink PCI-7296 96 ch. digital io board
  25 Devices: [ADLink] PCI-7296 (adl_pci7296)
  26 Author: Jon Grierson <jd@renko.co.uk>
  27 Updated: Mon, 14 Apr 2008 15:05:56 +0100
  28 Status: testing
  29
  30 Configuration Options:
  31   [0] - PCI bus of device (optional)
  32   [1] - PCI slot of device (optional)
  33   If bus/slot is not specified, the first supported
  34   PCI device found will be used.
  35 */
  36
  37 #include "../comedidev.h"
  38 #include <linux/kernel.h>
  39
  40 #include "comedi_pci.h"
  41 #include "8255.h"
  42 /* #include "8253.h" */
  43
  44 #define PORT1A 0
  45 #define PORT2A 4
  46 #define PORT3A 8
  47 #define PORT4A 12
  48
  49 #define PCI_DEVICE_ID_PCI7296 0x7296
  50
  51 static DEFINE_PCI_DEVICE_TABLE(adl_pci7296_pci_table) = {
  52         {
  53         PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296, PCI_ANY_ID,
  54                     PCI_ANY_ID, 0, 0, 0}, {
  55         0}
  56 };
  57
  58 MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);
  59
  60 struct adl_pci7296_private {
  61         int data;
  62         struct pci_dev *pci_dev;
  63 };
  64
  65 #define devpriv ((struct adl_pci7296_private *)dev->private)
  66
  67 static int adl_pci7296_attach(struct comedi_device *dev,
  68                               struct comedi_devconfig *it);
  69 static int adl_pci7296_detach(struct comedi_device *dev);
  70 static struct comedi_driver driver_adl_pci7296 = {
  71         .driver_name = "adl_pci7296",
  72         .module = THIS_MODULE,
  73         .attach = adl_pci7296_attach,
  74         .detach = adl_pci7296_detach,
  75 };
  76
  77 static int adl_pci7296_attach(struct comedi_device *dev,
  78                               struct comedi_devconfig *it)
  79 {
  80         struct pci_dev *pcidev = NULL;
  81         struct comedi_subdevice *s;
  82         int bus, slot;
  83         int ret;
  84
  85         printk(KERN_INFO "comedi%d: attach adl_pci7432\n", dev->minor);
  86
  87         dev->board_name = "pci7432";
  88         bus = it->options[0];
  89         slot = it->options[1];
  90
  91         if (alloc_private(dev, sizeof(struct adl_pci7296_private)) < 0)
  92                 return -ENOMEM;
  93
  94         if (alloc_subdevices(dev, 4) < 0)
  95                 return -ENOMEM;
  96
  97         for_each_pci_dev(pcidev) {
  98                 if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
  99                     pcidev->device == PCI_DEVICE_ID_PCI7296) {
 100                         if (bus || slot) {
 101                                 /* requested particular bus/slot */
 102                                 if (pcidev->bus->number != bus
 103                                     || PCI_SLOT(pcidev->devfn) != slot) {
 104                                         continue;
 105                                 }
 106                         }
 107                         devpriv->pci_dev = pcidev;
 108                         if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
 109                                 printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
 110                                      dev->minor);
 111                                 return -EIO;
 112                         }
 113
 114                         dev->iobase = pci_resource_start(pcidev, 2);
 115                         printk(KERN_INFO "comedi: base addr %4lx\n",
 116                                 dev->iobase);
 117
 118                         /*  four 8255 digital io subdevices */
 119                         s = dev->subdevices + 0;
 120                         subdev_8255_init(dev, s, NULL,
 121                                          (unsigned long)(dev->iobase));
 122
 123                         s = dev->subdevices + 1;
 124                         ret = subdev_8255_init(dev, s, NULL,
 125                                                (unsigned long)(dev->iobase +
 126                                                                PORT2A));
 127                         if (ret < 0)
 128                                 return ret;
 129
 130                         s = dev->subdevices + 2;
 131                         ret = subdev_8255_init(dev, s, NULL,
 132                                                (unsigned long)(dev->iobase +
 133                                                                PORT3A));
 134                         if (ret < 0)
 135                                 return ret;
 136
 137                         s = dev->subdevices + 3;
 138                         ret = subdev_8255_init(dev, s, NULL,
 139                                                (unsigned long)(dev->iobase +
 140                                                                PORT4A));
 141                         if (ret < 0)
 142                                 return ret;
 143
 144                         printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n",
 145                                 dev->minor);
 146
 147                         return 1;
 148                 }
 149         }
 150
 151         printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
 152                dev->minor, bus, slot);
 153         return -EIO;
 154 }
 155
 156 static int adl_pci7296_detach(struct comedi_device *dev)
 157 {
 158         printk(KERN_INFO "comedi%d: pci7432: remove\n", dev->minor);
 159
 160         if (devpriv && devpriv->pci_dev) {
 161                 if (dev->iobase)
 162                         comedi_pci_disable(devpriv->pci_dev);
 163                 pci_dev_put(devpriv->pci_dev);
 164         }
 165         /*  detach four 8255 digital io subdevices */
 166         if (dev->subdevices) {
 167                 subdev_8255_cleanup(dev, dev->subdevices + 0);
 168                 subdev_8255_cleanup(dev, dev->subdevices + 1);
 169                 subdev_8255_cleanup(dev, dev->subdevices + 2);
 170                 subdev_8255_cleanup(dev, dev->subdevices + 3);
 171
 172         }
 173
 174         return 0;
 175 }
 176
 177 static int __devinit driver_adl_pci7296_pci_probe(struct pci_dev *dev,
 178                                                   const struct pci_device_id
 179                                                   *ent)
 180 {
 181         return comedi_pci_auto_config(dev, driver_adl_pci7296.driver_name);
 182 }
 183
 184 static void __devexit driver_adl_pci7296_pci_remove(struct pci_dev *dev)
 185 {
 186         comedi_pci_auto_unconfig(dev);
 187 }
 188
 189 static struct pci_driver driver_adl_pci7296_pci_driver = {
 190         .id_table = adl_pci7296_pci_table,
 191         .probe = &driver_adl_pci7296_pci_probe,
 192         .remove = __devexit_p(&driver_adl_pci7296_pci_remove)
 193 };
 194
 195 static int __init driver_adl_pci7296_init_module(void)
 196 {
 197         int retval;
 198
 199         retval = comedi_driver_register(&driver_adl_pci7296);
 200         if (retval < 0)
 201                 return retval;
 202
 203         driver_adl_pci7296_pci_driver.name =
 204             (char *)driver_adl_pci7296.driver_name;
 205         return pci_register_driver(&driver_adl_pci7296_pci_driver);
 206 }
 207
 208 static void __exit driver_adl_pci7296_cleanup_module(void)
 209 {
 210         pci_unregister_driver(&driver_adl_pci7296_pci_driver);
 211         comedi_driver_unregister(&driver_adl_pci7296);
 212 }
 213
 214 module_init(driver_adl_pci7296_init_module);
 215 module_exit(driver_adl_pci7296_cleanup_module);
 216
 217 MODULE_AUTHOR("Comedi http://www.comedi.org");
 218 MODULE_DESCRIPTION("Comedi low-level driver");
 219 MODULE_LICENSE("GPL");