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         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296) },
  53         {0}
  54 };
  55
  56 MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);
  57
  58 struct adl_pci7296_private {
  59         int data;
  60         struct pci_dev *pci_dev;
  61 };
  62
  63 #define devpriv ((struct adl_pci7296_private *)dev->private)
  64
  65 static int adl_pci7296_attach(struct comedi_device *dev,
  66                               struct comedi_devconfig *it);
  67 static int adl_pci7296_detach(struct comedi_device *dev);
  68 static struct comedi_driver driver_adl_pci7296 = {
  69         .driver_name = "adl_pci7296",
  70         .module = THIS_MODULE,
  71         .attach = adl_pci7296_attach,
  72         .detach = adl_pci7296_detach,
  73 };
  74
  75 static int adl_pci7296_attach(struct comedi_device *dev,
  76                               struct comedi_devconfig *it)
  77 {
  78         struct pci_dev *pcidev = NULL;
  79         struct comedi_subdevice *s;
  80         int bus, slot;
  81         int ret;
  82
  83         printk(KERN_INFO "comedi%d: attach adl_pci7432\n", dev->minor);
  84
  85         dev->board_name = "pci7432";
  86         bus = it->options[0];
  87         slot = it->options[1];
  88
  89         if (alloc_private(dev, sizeof(struct adl_pci7296_private)) < 0)
  90                 return -ENOMEM;
  91
  92         if (alloc_subdevices(dev, 4) < 0)
  93                 return -ENOMEM;
  94
  95         for_each_pci_dev(pcidev) {
  96                 if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
  97                     pcidev->device == PCI_DEVICE_ID_PCI7296) {
  98                         if (bus || slot) {
  99                                 /* requested particular bus/slot */
 100                                 if (pcidev->bus->number != bus
 101                                     || PCI_SLOT(pcidev->devfn) != slot) {
 102                                         continue;
 103                                 }
 104                         }
 105                         devpriv->pci_dev = pcidev;
 106                         if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
 107                                 printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
 108                                      dev->minor);
 109                                 return -EIO;
 110                         }
 111
 112                         dev->iobase = pci_resource_start(pcidev, 2);
 113                         printk(KERN_INFO "comedi: base addr %4lx\n",
 114                                 dev->iobase);
 115
 116                         /*  four 8255 digital io subdevices */
 117                         s = dev->subdevices + 0;
 118                         subdev_8255_init(dev, s, NULL,
 119                                          (unsigned long)(dev->iobase));
 120
 121                         s = dev->subdevices + 1;
 122                         ret = subdev_8255_init(dev, s, NULL,
 123                                                (unsigned long)(dev->iobase +
 124                                                                PORT2A));
 125                         if (ret < 0)
 126                                 return ret;
 127
 128                         s = dev->subdevices + 2;
 129                         ret = subdev_8255_init(dev, s, NULL,
 130                                                (unsigned long)(dev->iobase +
 131                                                                PORT3A));
 132                         if (ret < 0)
 133                                 return ret;
 134
 135                         s = dev->subdevices + 3;
 136                         ret = subdev_8255_init(dev, s, NULL,
 137                                                (unsigned long)(dev->iobase +
 138                                                                PORT4A));
 139                         if (ret < 0)
 140                                 return ret;
 141
 142                         printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n",
 143                                 dev->minor);
 144
 145                         return 1;
 146                 }
 147         }
 148
 149         printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
 150                dev->minor, bus, slot);
 151         return -EIO;
 152 }
 153
 154 static int adl_pci7296_detach(struct comedi_device *dev)
 155 {
 156         printk(KERN_INFO "comedi%d: pci7432: remove\n", dev->minor);
 157
 158         if (devpriv && devpriv->pci_dev) {
 159                 if (dev->iobase)
 160                         comedi_pci_disable(devpriv->pci_dev);
 161                 pci_dev_put(devpriv->pci_dev);
 162         }
 163         /*  detach four 8255 digital io subdevices */
 164         if (dev->subdevices) {
 165                 subdev_8255_cleanup(dev, dev->subdevices + 0);
 166                 subdev_8255_cleanup(dev, dev->subdevices + 1);
 167                 subdev_8255_cleanup(dev, dev->subdevices + 2);
 168                 subdev_8255_cleanup(dev, dev->subdevices + 3);
 169
 170         }
 171
 172         return 0;
 173 }
 174
 175 static int __devinit driver_adl_pci7296_pci_probe(struct pci_dev *dev,
 176                                                   const struct pci_device_id
 177                                                   *ent)
 178 {
 179         return comedi_pci_auto_config(dev, driver_adl_pci7296.driver_name);
 180 }
 181
 182 static void __devexit driver_adl_pci7296_pci_remove(struct pci_dev *dev)
 183 {
 184         comedi_pci_auto_unconfig(dev);
 185 }
 186
 187 static struct pci_driver driver_adl_pci7296_pci_driver = {
 188         .id_table = adl_pci7296_pci_table,
 189         .probe = &driver_adl_pci7296_pci_probe,
 190         .remove = __devexit_p(&driver_adl_pci7296_pci_remove)
 191 };
 192
 193 static int __init driver_adl_pci7296_init_module(void)
 194 {
 195         int retval;
 196
 197         retval = comedi_driver_register(&driver_adl_pci7296);
 198         if (retval < 0)
 199                 return retval;
 200
 201         driver_adl_pci7296_pci_driver.name =
 202             (char *)driver_adl_pci7296.driver_name;
 203         return pci_register_driver(&driver_adl_pci7296_pci_driver);
 204 }
 205
 206 static void __exit driver_adl_pci7296_cleanup_module(void)
 207 {
 208         pci_unregister_driver(&driver_adl_pci7296_pci_driver);
 209         comedi_driver_unregister(&driver_adl_pci7296);
 210 }
 211
 212 module_init(driver_adl_pci7296_init_module);
 213 module_exit(driver_adl_pci7296_cleanup_module);
 214
 215 MODULE_AUTHOR("Comedi http://www.comedi.org");
 216 MODULE_DESCRIPTION("Comedi low-level driver");
 217 MODULE_LICENSE("GPL");