drivers/staging/meilhaus/me8100_do.h

   1 /**
   2  * @file me8100_do.h
   3  *
   4  * @brief ME-8100 digital 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 _ME8100_DO_H_
  28 #define _ME8100_DO_H_
  29
  30 #include "mesubdevice.h"
  31
  32 #ifdef __KERNEL__
  33
  34 /**
  35  * @brief The template subdevice class.
  36  */
  37 typedef struct me8100_do_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 the #ctrl_reg. */
  44
  45         unsigned int do_idx;
  46
  47         uint16_t port_reg_mirror;               /**< Mirror used to store current port register setting which is write only. */
  48
  49         unsigned long port_reg;                 /**< Register holding the port status. */
  50         unsigned long ctrl_reg;                 /**< Control register. */
  51 #ifdef MEDEBUG_DEBUG_REG
  52         unsigned long reg_base;
  53 #endif
  54 } me8100_do_subdevice_t;
  55
  56 /**
  57  * @brief The constructor to generate a ME-8100 digital output subdevice instance.
  58  *
  59  * @param reg_base The register base address of the device as returned by the PCI BIOS.
  60  * @param do_idx The index of the digital output subdevice on this device.
  61  *
  62  * @return Pointer to new instance on success.\n
  63  * NULL on error.
  64  */
  65 me8100_do_subdevice_t *me8100_do_constructor(uint32_t reg_base,
  66                                              unsigned int do_idx,
  67                                              spinlock_t * ctrl_reg_lock);
  68
  69 #endif
  70 #endif