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  1. /*
  2.  * Copyright (c) 2009 Martin Decky
  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 genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief Dummy serial line input.
  35.  */
  36.  
  37. #include <genarch/drivers/dsrln/dsrlnin.h>
  38. #include <console/chardev.h>
  39. #include <mm/slab.h>
  40. #include <arch/asm.h>
  41. #include <ddi/device.h>
  42.  
  43. static indev_operations_t kbrdin_ops = {
  44.     .poll = NULL
  45. };
  46.  
  47. static irq_ownership_t dsrlnin_claim(irq_t *irq)
  48. {
  49.     return IRQ_ACCEPT;
  50. }
  51.  
  52. static void dsrlnin_irq_handler(irq_t *irq)
  53. {
  54.     dsrlnin_instance_t *instance = irq->instance;
  55.     dsrlnin_t *dev = instance->dsrlnin;
  56.    
  57.     indev_push_character(&instance->kbrdin, pio_read_8(&dev->data));
  58. }
  59.  
  60. indev_t *dsrlnin_init(dsrlnin_t *dev, inr_t inr)
  61. {
  62.     dsrlnin_instance_t *instance
  63.         = malloc(sizeof(dsrlnin_instance_t), FRAME_ATOMIC);
  64.     if (!instance)
  65.         return NULL;
  66.    
  67.     indev_initialize("dsrlnin", &instance->kbrdin, &kbrdin_ops);
  68.    
  69.     instance->dsrlnin = dev;
  70.    
  71.     irq_initialize(&instance->irq);
  72.     instance->irq.devno = device_assign_devno();
  73.     instance->irq.inr = inr;
  74.     instance->irq.claim = dsrlnin_claim;
  75.     instance->irq.handler = dsrlnin_irq_handler;
  76.     instance->irq.instance = instance;
  77.     irq_register(&instance->irq);
  78.    
  79.     return &instance->kbrdin;
  80. }
  81.  
  82. /** @}
  83.  */
  84.