| /* |
| * 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); |