kernel/2.6.29.6-aldebaran-rt/drivers/staging/meilhaus/me6000_dio.h

   1 /**
   2  * @file me6000_dio.h
   3  *
   4  * @brief ME-6000 digital input/output subdevice class.
   5  * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
   6  * @author Guenter Gebhardt
   7  */
   8
   9 /*
  10  * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
  11  *
  12  * This file is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  */
  26
  27 #ifndef _ME6000_DIO_H_
  28 #define _ME6000_DIO_H_
  29
  30 #include "mesubdevice.h"
  31
  32 #ifdef __KERNEL__
  33
  34 /**
  35  * @brief The template subdevice class.
  36  */
  37 typedef struct me6000_dio_subdevice {
  38         /* Inheritance */
  39         me_subdevice_t base;                    /**< The subdevice base class. */
  40
  41         /* Attributes */
  42         spinlock_t subdevice_lock;              /**< Spin lock to protect the subdevice from concurrent access. */
  43         spinlock_t *ctrl_reg_lock;              /**< Spin lock to protect #ctrl_reg from concurrent access. */
  44         unsigned int dio_idx;                   /**< The index of the digital i/o on the device. */
  45
  46         unsigned long port_reg;                 /**< Register holding the port status. */
  47         unsigned long ctrl_reg;                 /**< Register to configure the port direction. */
  48 #ifdef MEDEBUG_DEBUG_REG
  49         unsigned long reg_base;
  50 #endif
  51 } me6000_dio_subdevice_t;
  52
  53 /**
  54  * @brief The constructor to generate a ME-6000 digital input/ouput subdevice instance.
  55  *
  56  * @param reg_base The register base address of the device as returned by the PCI BIOS.
  57  * @param dio_idx The index of the digital i/o port on the device.
  58  * @param ctrl_reg_lock Spin lock protecting the control register.
  59  *
  60  * @return Pointer to new instance on success.\n
  61  * NULL on error.
  62  */
  63 me6000_dio_subdevice_t *me6000_dio_constructor(uint32_t reg_base,
  64                                                unsigned int dio_idx,
  65                                                spinlock_t * ctrl_reg_lock);
  66
  67 #endif
  68 #endif