diff options
Diffstat (limited to 'drivers/staging/comedi/comedi_pci.c')
-rw-r--r-- | drivers/staging/comedi/comedi_pci.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_pci.c b/drivers/staging/comedi/comedi_pci.c new file mode 100644 index 000000000000..37d2e4677360 --- /dev/null +++ b/drivers/staging/comedi/comedi_pci.c @@ -0,0 +1,140 @@ +/* + * comedi_pci.c + * Comedi PCI driver specific functions. + * + * COMEDI - Linux Control and Measurement Device Interface + * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/pci.h> + +#include "comedidev.h" + +/** + * comedi_to_pci_dev() - comedi_device pointer to pci_dev pointer. + * @dev: comedi_device struct + */ +struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev) +{ + return dev->hw_dev ? to_pci_dev(dev->hw_dev) : NULL; +} +EXPORT_SYMBOL_GPL(comedi_to_pci_dev); + +/** + * comedi_pci_enable() - Enable the PCI device and request the regions. + * @pcidev: pci_dev struct + * @res_name: name for the requested reqource + */ +int comedi_pci_enable(struct pci_dev *pcidev, const char *res_name) +{ + int rc; + + rc = pci_enable_device(pcidev); + if (rc < 0) + return rc; + + rc = pci_request_regions(pcidev, res_name); + if (rc < 0) + pci_disable_device(pcidev); + + return rc; +} +EXPORT_SYMBOL_GPL(comedi_pci_enable); + +/** + * comedi_pci_disable() - Release the regions and disable the PCI device. + * @pcidev: pci_dev struct + * + * This must be matched with a previous successful call to comedi_pci_enable(). + */ +void comedi_pci_disable(struct pci_dev *pcidev) +{ + pci_release_regions(pcidev); + pci_disable_device(pcidev); +} +EXPORT_SYMBOL_GPL(comedi_pci_disable); + +/** + * comedi_pci_auto_config() - Configure/probe a comedi PCI driver. + * @pcidev: pci_dev struct + * @driver: comedi_driver struct + * + * Typically called from the pci_driver (*probe) function. + */ +int comedi_pci_auto_config(struct pci_dev *pcidev, + struct comedi_driver *driver) +{ + return comedi_auto_config(&pcidev->dev, driver, 0); +} +EXPORT_SYMBOL_GPL(comedi_pci_auto_config); + +/** + * comedi_pci_auto_unconfig() - Unconfigure/remove a comedi PCI driver. + * @pcidev: pci_dev struct + * + * Typically called from the pci_driver (*remove) function. + */ +void comedi_pci_auto_unconfig(struct pci_dev *pcidev) +{ + comedi_auto_unconfig(&pcidev->dev); +} +EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig); + +/** + * comedi_pci_driver_register() - Register a comedi PCI driver. + * @comedi_driver: comedi_driver struct + * @pci_driver: pci_driver struct + * + * This function is used for the module_init() of comedi PCI drivers. + * Do not call it directly, use the module_comedi_pci_driver() helper + * macro instead. + */ +int comedi_pci_driver_register(struct comedi_driver *comedi_driver, + struct pci_driver *pci_driver) +{ + int ret; + + ret = comedi_driver_register(comedi_driver); + if (ret < 0) + return ret; + + ret = pci_register_driver(pci_driver); + if (ret < 0) { + comedi_driver_unregister(comedi_driver); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(comedi_pci_driver_register); + +/** + * comedi_pci_driver_unregister() - Unregister a comedi PCI driver. + * @comedi_driver: comedi_driver struct + * @pci_driver: pci_driver struct + * + * This function is used for the module_exit() of comedi PCI drivers. + * Do not call it directly, use the module_comedi_pci_driver() helper + * macro instead. + */ +void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver, + struct pci_driver *pci_driver) +{ + pci_unregister_driver(pci_driver); + comedi_driver_unregister(comedi_driver); +} +EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister); |