187 lines
4.6 KiB
C
187 lines
4.6 KiB
C
/*
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* comedi_pci.c
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* Comedi PCI driver specific functions.
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include "comedidev.h"
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/**
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* comedi_to_pci_dev() - comedi_device pointer to pci_dev pointer.
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* @dev: comedi_device struct
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*/
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struct pci_dev *comedi_to_pci_dev(struct comedi_device *dev)
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{
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return dev->hw_dev ? to_pci_dev(dev->hw_dev) : NULL;
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}
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EXPORT_SYMBOL_GPL(comedi_to_pci_dev);
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/**
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* comedi_pci_enable() - Enable the PCI device and request the regions.
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* @dev: comedi_device struct
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*/
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int comedi_pci_enable(struct comedi_device *dev)
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{
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struct pci_dev *pcidev = comedi_to_pci_dev(dev);
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int rc;
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if (!pcidev)
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return -ENODEV;
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rc = pci_enable_device(pcidev);
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if (rc < 0)
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return rc;
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rc = pci_request_regions(pcidev, dev->board_name);
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if (rc < 0)
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pci_disable_device(pcidev);
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else
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dev->ioenabled = true;
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return rc;
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}
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EXPORT_SYMBOL_GPL(comedi_pci_enable);
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/**
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* comedi_pci_disable() - Release the regions and disable the PCI device.
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* @dev: comedi_device struct
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*/
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void comedi_pci_disable(struct comedi_device *dev)
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{
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struct pci_dev *pcidev = comedi_to_pci_dev(dev);
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if (pcidev && dev->ioenabled) {
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pci_release_regions(pcidev);
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pci_disable_device(pcidev);
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}
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dev->ioenabled = false;
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}
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EXPORT_SYMBOL_GPL(comedi_pci_disable);
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/**
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* comedi_pci_detach() - A generic (*detach) function for PCI drivers.
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* @dev: comedi_device struct
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*/
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void comedi_pci_detach(struct comedi_device *dev)
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{
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struct pci_dev *pcidev = comedi_to_pci_dev(dev);
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if (!pcidev || !dev->ioenabled)
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return;
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if (dev->irq) {
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free_irq(dev->irq, dev);
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dev->irq = 0;
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}
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if (dev->mmio) {
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iounmap(dev->mmio);
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dev->mmio = NULL;
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}
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comedi_pci_disable(dev);
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}
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EXPORT_SYMBOL_GPL(comedi_pci_detach);
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/**
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* comedi_pci_auto_config() - Configure/probe a comedi PCI driver.
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* @pcidev: pci_dev struct
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* @driver: comedi_driver struct
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* @context: driver specific data, passed to comedi_auto_config()
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*
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* Typically called from the pci_driver (*probe) function.
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*/
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int comedi_pci_auto_config(struct pci_dev *pcidev,
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struct comedi_driver *driver,
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unsigned long context)
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{
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return comedi_auto_config(&pcidev->dev, driver, context);
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}
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EXPORT_SYMBOL_GPL(comedi_pci_auto_config);
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/**
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* comedi_pci_auto_unconfig() - Unconfigure/remove a comedi PCI driver.
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* @pcidev: pci_dev struct
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*
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* Typically called from the pci_driver (*remove) function.
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*/
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void comedi_pci_auto_unconfig(struct pci_dev *pcidev)
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{
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comedi_auto_unconfig(&pcidev->dev);
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}
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EXPORT_SYMBOL_GPL(comedi_pci_auto_unconfig);
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/**
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* comedi_pci_driver_register() - Register a comedi PCI driver.
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* @comedi_driver: comedi_driver struct
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* @pci_driver: pci_driver struct
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*
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* This function is used for the module_init() of comedi PCI drivers.
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* Do not call it directly, use the module_comedi_pci_driver() helper
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* macro instead.
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*/
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int comedi_pci_driver_register(struct comedi_driver *comedi_driver,
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struct pci_driver *pci_driver)
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{
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int ret;
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ret = comedi_driver_register(comedi_driver);
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if (ret < 0)
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return ret;
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ret = pci_register_driver(pci_driver);
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if (ret < 0) {
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comedi_driver_unregister(comedi_driver);
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return ret;
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}
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return 0;
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}
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EXPORT_SYMBOL_GPL(comedi_pci_driver_register);
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/**
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* comedi_pci_driver_unregister() - Unregister a comedi PCI driver.
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* @comedi_driver: comedi_driver struct
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* @pci_driver: pci_driver struct
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*
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* This function is used for the module_exit() of comedi PCI drivers.
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* Do not call it directly, use the module_comedi_pci_driver() helper
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* macro instead.
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*/
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void comedi_pci_driver_unregister(struct comedi_driver *comedi_driver,
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struct pci_driver *pci_driver)
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{
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pci_unregister_driver(pci_driver);
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comedi_driver_unregister(comedi_driver);
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}
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EXPORT_SYMBOL_GPL(comedi_pci_driver_unregister);
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static int __init comedi_pci_init(void)
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{
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return 0;
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}
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module_init(comedi_pci_init);
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static void __exit comedi_pci_exit(void)
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{
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}
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module_exit(comedi_pci_exit);
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MODULE_AUTHOR("http://www.comedi.org");
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MODULE_DESCRIPTION("Comedi PCI interface module");
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MODULE_LICENSE("GPL");
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