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/*
* 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/module.h>
#include <linux/interrupt.h>
#include "comedi_pci.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_detach() - A generic (*detach) function for PCI drivers.
* @dev: comedi_device struct
*/
void comedi_pci_detach(struct comedi_device *dev)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
if (!pcidev || !dev->ioenabled)
return;
if (dev->irq) {
free_irq(dev->irq, dev);
dev->irq = 0;
}
if (dev->mmio) {
iounmap(dev->mmio);
dev->mmio = NULL;
}
comedi_pci_disable(dev);
}
EXPORT_SYMBOL_GPL(comedi_pci_detach);
/**
* 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);
static int __init comedi_pci_init(void)
{
return 0;
}
module_init(comedi_pci_init);
static void __exit comedi_pci_exit(void)
{
}
module_exit(comedi_pci_exit);
MODULE_AUTHOR("http://www.comedi.org");
MODULE_DESCRIPTION("Comedi PCI interface module");
MODULE_LICENSE("GPL");
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