drivers/staging/comedi/drivers/comedi_pci.h

   1 /*
   2     comedi/drivers/comedi_pci.h
   3     Various PCI functions for drivers.
   4
   5     Copyright (C) 2007 MEV Ltd. <http://www.mev.co.uk/>
   6
   7     COMEDI - Linux Control and Measurement Device Interface
   8     Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   9
  10     This program is free software; you can redistribute it and/or modify
  11     it under the terms of the GNU General Public License as published by
  12     the Free Software Foundation; either version 2 of the License, or
  13     (at your option) any later version.
  14
  15     This program is distributed in the hope that it will be useful,
  16     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18     GNU General Public License for more details.
  19
  20     You should have received a copy of the GNU General Public License
  21     along with this program; if not, write to the Free Software
  22     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 */
  25
  26 #ifndef _COMEDI_PCI_H_
  27 #define _COMEDI_PCI_H_
  28
  29 #include <linux/pci.h>
  30
  31 /*
  32  * Enable the PCI device and request the regions.
  33  */
  34 static inline int comedi_pci_enable(struct pci_dev *pdev, const char *res_name)
  35 {
  36         int rc;
  37
  38         rc = pci_enable_device(pdev);
  39         if (rc < 0)
  40                 return rc;
  41
  42         rc = pci_request_regions(pdev, res_name);
  43         if (rc < 0)
  44                 pci_disable_device(pdev);
  45
  46         return rc;
  47 }
  48
  49 /*
  50  * Release the regions and disable the PCI device.
  51  *
  52  * This must be matched with a previous successful call to comedi_pci_enable().
  53  */
  54 static inline void comedi_pci_disable(struct pci_dev *pdev)
  55 {
  56         pci_release_regions(pdev);
  57         pci_disable_device(pdev);
  58 }
  59
  60 #endif