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/*
* comedi_pcmcia.c
* Comedi PCMCIA 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/kernel.h>
#include "comedi_pcmcia.h"
/**
* comedi_to_pcmcia_dev() - comedi_device pointer to pcmcia_device pointer.
* @dev: comedi_device struct
*/
struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *dev)
{
return dev->hw_dev ? to_pcmcia_dev(dev->hw_dev) : NULL;
}
EXPORT_SYMBOL_GPL(comedi_to_pcmcia_dev);
static int comedi_pcmcia_conf_check(struct pcmcia_device *link,
void *priv_data)
{
if (link->config_index == 0)
return -EINVAL;
return pcmcia_request_io(link);
}
/**
* comedi_pcmcia_enable() - Request the regions and enable the PCMCIA device.
* @dev: comedi_device struct
* @conf_check: optional callback to check the pcmcia_device configuration
*
* The comedi PCMCIA driver needs to set the link->config_flags, as
* appropriate for that driver, before calling this function in order
* to allow pcmcia_loop_config() to do its internal autoconfiguration.
*/
int comedi_pcmcia_enable(struct comedi_device *dev,
int (*conf_check)(struct pcmcia_device *, void *))
{
struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
int ret;
if (!link)
return -ENODEV;
if (!conf_check)
conf_check = comedi_pcmcia_conf_check;
ret = pcmcia_loop_config(link, conf_check, NULL);
if (ret)
return ret;
return pcmcia_enable_device(link);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_enable);
/**
* comedi_pcmcia_disable() - Disable the PCMCIA device and release the regions.
* @dev: comedi_device struct
*/
void comedi_pcmcia_disable(struct comedi_device *dev)
{
struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
if (link)
pcmcia_disable_device(link);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_disable);
/**
* comedi_pcmcia_auto_config() - Configure/probe a comedi PCMCIA driver.
* @link: pcmcia_device struct
* @driver: comedi_driver struct
*
* Typically called from the pcmcia_driver (*probe) function.
*/
int comedi_pcmcia_auto_config(struct pcmcia_device *link,
struct comedi_driver *driver)
{
return comedi_auto_config(&link->dev, driver, 0);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_config);
/**
* comedi_pcmcia_auto_unconfig() - Unconfigure/remove a comedi PCMCIA driver.
* @link: pcmcia_device struct
*
* Typically called from the pcmcia_driver (*remove) function.
*/
void comedi_pcmcia_auto_unconfig(struct pcmcia_device *link)
{
comedi_auto_unconfig(&link->dev);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_unconfig);
/**
* comedi_pcmcia_driver_register() - Register a comedi PCMCIA driver.
* @comedi_driver: comedi_driver struct
* @pcmcia_driver: pcmcia_driver struct
*
* This function is used for the module_init() of comedi USB drivers.
* Do not call it directly, use the module_comedi_pcmcia_driver() helper
* macro instead.
*/
int comedi_pcmcia_driver_register(struct comedi_driver *comedi_driver,
struct pcmcia_driver *pcmcia_driver)
{
int ret;
ret = comedi_driver_register(comedi_driver);
if (ret < 0)
return ret;
ret = pcmcia_register_driver(pcmcia_driver);
if (ret < 0) {
comedi_driver_unregister(comedi_driver);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_register);
/**
* comedi_pcmcia_driver_unregister() - Unregister a comedi PCMCIA driver.
* @comedi_driver: comedi_driver struct
* @pcmcia_driver: pcmcia_driver struct
*
* This function is used for the module_exit() of comedi PCMCIA drivers.
* Do not call it directly, use the module_comedi_pcmcia_driver() helper
* macro instead.
*/
void comedi_pcmcia_driver_unregister(struct comedi_driver *comedi_driver,
struct pcmcia_driver *pcmcia_driver)
{
pcmcia_unregister_driver(pcmcia_driver);
comedi_driver_unregister(comedi_driver);
}
EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_unregister);
static int __init comedi_pcmcia_init(void)
{
return 0;
}
module_init(comedi_pcmcia_init);
static void __exit comedi_pcmcia_exit(void)
{
}
module_exit(comedi_pcmcia_exit);
MODULE_AUTHOR("http://www.comedi.org");
MODULE_DESCRIPTION("Comedi PCMCIA interface module");
MODULE_LICENSE("GPL");
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