| /* |
| * 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/kernel.h> |
| |
| #include <pcmcia/cistpl.h> |
| #include <pcmcia/ds.h> |
| |
| #include "comedidev.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); |