/* * 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. */ #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. * @dev: comedi_device struct */ int comedi_pci_enable(struct comedi_device *dev) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); int rc; if (!pcidev) return -ENODEV; rc = pci_enable_device(pcidev); if (rc < 0) return rc; rc = pci_request_regions(pcidev, dev->board_name); if (rc < 0) pci_disable_device(pcidev); else dev->ioenabled = true; return rc; } EXPORT_SYMBOL_GPL(comedi_pci_enable); /** * comedi_pci_disable() - Release the regions and disable the PCI device. * @dev: comedi_device struct */ void comedi_pci_disable(struct comedi_device *dev) { struct pci_dev *pcidev = comedi_to_pci_dev(dev); if (pcidev && dev->ioenabled) { pci_release_regions(pcidev); pci_disable_device(pcidev); } dev->ioenabled = false; } EXPORT_SYMBOL_GPL(comedi_pci_disable); /** * comedi_pci_auto_config() - Configure/probe a comedi PCI driver. * @pcidev: pci_dev struct * @driver: comedi_driver struct * @context: driver specific data, passed to comedi_auto_config() * * Typically called from the pci_driver (*probe) function. */ int comedi_pci_auto_config(struct pci_dev *pcidev, struct comedi_driver *driver, unsigned long context) { return comedi_auto_config(&pcidev->dev, driver, context); } 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);