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;
  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 (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
  98              pcidev != NULL;
  99              pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
 100
 101                 if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
 102                     pcidev->device == PCI_DEVICE_ID_PCI7296) {
 103                         if (bus || slot) {
 104                                 /* requested particular bus/slot */
 105                                 if (pcidev->bus->number != bus
 106                                     || PCI_SLOT(pcidev->devfn) != slot) {
 107                                         continue;
 108                                 }
 109                         }
 110                         devpriv->pci_dev = pcidev;
 111                         if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
 112                                 printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
 113                                      dev->minor);
 114                                 return -EIO;
 115                         }
 116
 117                         dev->iobase = pci_resource_start(pcidev, 2);
 118                         printk(KERN_INFO "comedi: base addr %4lx\n",
 119                                 dev->iobase);
 120
 121                         /*  four 8255 digital io subdevices */
 122                         s = dev->subdevices + 0;
 123                         subdev_8255_init(dev, s, NULL,
 124                                          (unsigned long)(dev->iobase));
 125
 126                         s = dev->subdevices + 1;
 127                         ret = subdev_8255_init(dev, s, NULL,
 128                                                (unsigned long)(dev->iobase +
 129                                                                PORT2A));
 130                         if (ret < 0)
 131                                 return ret;
 132
 133                         s = dev->subdevices + 2;
 134                         ret = subdev_8255_init(dev, s, NULL,
 135                                                (unsigned long)(dev->iobase +
 136                                                                PORT3A));
 137                         if (ret < 0)
 138                                 return ret;
 139
 140                         s = dev->subdevices + 3;
 141                         ret = subdev_8255_init(dev, s, NULL,
 142                                                (unsigned long)(dev->iobase +
 143                                                                PORT4A));
 144                         if (ret < 0)
 145                                 return ret;
 146
 147                         printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n",
 148                                 dev->minor);
 149
 150                         return 1;
 151                 }
 152         }
 153
 154         printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
 155                dev->minor, bus, slot);
 156         return -EIO;
 157 }
 158
 159 static int adl_pci7296_detach(struct comedi_device *dev)
 160 {
 161         printk(KERN_INFO "comedi%d: pci7432: remove\n", dev->minor);
 162
 163         if (devpriv && devpriv->pci_dev) {
 164                 if (dev->iobase)
 165                         comedi_pci_disable(devpriv->pci_dev);
 166                 pci_dev_put(devpriv->pci_dev);
 167         }
 168         /*  detach four 8255 digital io subdevices */
 169         if (dev->subdevices) {
 170                 subdev_8255_cleanup(dev, dev->subdevices + 0);
 171                 subdev_8255_cleanup(dev, dev->subdevices + 1);
 172                 subdev_8255_cleanup(dev, dev->subdevices + 2);
 173                 subdev_8255_cleanup(dev, dev->subdevices + 3);
 174
 175         }
 176
 177         return 0;
 178 }
 179
 180 static int __devinit driver_adl_pci7296_pci_probe(struct pci_dev *dev,
 181                                                   const struct pci_device_id
 182                                                   *ent)
 183 {
 184         return comedi_pci_auto_config(dev, driver_adl_pci7296.driver_name);
 185 }
 186
 187 static void __devexit driver_adl_pci7296_pci_remove(struct pci_dev *dev)
 188 {
 189         comedi_pci_auto_unconfig(dev);
 190 }
 191
 192 static struct pci_driver driver_adl_pci7296_pci_driver = {
 193         .id_table = adl_pci7296_pci_table,
 194         .probe = &driver_adl_pci7296_pci_probe,
 195         .remove = __devexit_p(&driver_adl_pci7296_pci_remove)
 196 };
 197
 198 static int __init driver_adl_pci7296_init_module(void)
 199 {
 200         int retval;
 201
 202         retval = comedi_driver_register(&driver_adl_pci7296);
 203         if (retval < 0)
 204                 return retval;
 205
 206         driver_adl_pci7296_pci_driver.name =
 207             (char *)driver_adl_pci7296.driver_name;
 208         return pci_register_driver(&driver_adl_pci7296_pci_driver);
 209 }
 210
 211 static void __exit driver_adl_pci7296_cleanup_module(void)
 212 {
 213         pci_unregister_driver(&driver_adl_pci7296_pci_driver);
 214         comedi_driver_unregister(&driver_adl_pci7296);
 215 }
 216
 217 module_init(driver_adl_pci7296_init_module);
 218 module_exit(driver_adl_pci7296_cleanup_module);
 219
 220 MODULE_AUTHOR("Comedi http://www.comedi.org");
 221 MODULE_DESCRIPTION("Comedi low-level driver");
 222 MODULE_LICENSE("GPL");