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  1. /*
  2.  * Copyright (c) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup genericconsole
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_CHARDEV_H_
  36. #define KERN_CHARDEV_H_
  37.  
  38. #include <arch/types.h>
  39. #include <synch/waitq.h>
  40. #include <synch/spinlock.h>
  41.  
  42. #define INDEV_BUFLEN  512
  43.  
  44. struct indev;
  45.  
  46. /* Input character device operations interface. */
  47. typedef struct {
  48.     /** Read character directly from device, assume interrupts disabled. */
  49.     char (* poll)(struct indev *);
  50. } indev_operations_t;
  51.  
  52. /** Character input device. */
  53. typedef struct indev {
  54.     char *name;
  55.     waitq_t wq;
  56.    
  57.     /** Protects everything below. */
  58.     SPINLOCK_DECLARE(lock);
  59.     uint8_t buffer[INDEV_BUFLEN];
  60.     count_t counter;
  61.    
  62.     /** Implementation of indev operations. */
  63.     indev_operations_t *op;
  64.     index_t index;
  65.     void *data;
  66. } indev_t;
  67.  
  68.  
  69. struct outdev;
  70.  
  71. /* Output character device operations interface. */
  72. typedef struct {
  73.     /** Write character to output. */
  74.     void (* write)(struct outdev *, wchar_t c, bool silent);
  75. } outdev_operations_t;
  76.  
  77. /** Character input device. */
  78. typedef struct outdev {
  79.     char *name;
  80.    
  81.     /** Protects everything below. */
  82.     SPINLOCK_DECLARE(lock);
  83.    
  84.     /** Implementation of outdev operations. */
  85.     outdev_operations_t *op;
  86.     void *data;
  87. } outdev_t;
  88.  
  89. extern void indev_initialize(char *name, indev_t *indev,
  90.     indev_operations_t *op);
  91. extern void indev_push_character(indev_t *indev, uint8_t ch);
  92.  
  93. extern void outdev_initialize(char *name, outdev_t *outdev,
  94.     outdev_operations_t *op);
  95.  
  96. #endif /* KERN_CHARDEV_H_ */
  97.  
  98. /** @}
  99.  */
  100.