comedi_pci.h revision d2f63f9c67ef1a627e7b0ccd5e236272db118ceb 
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 */
34static 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 */
54static inline void comedi_pci_disable(struct pci_dev *pdev)
55{
56	pci_release_regions(pdev);
57	pci_disable_device(pdev);
58}
59
60#endif
61