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