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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 irq_ownership_t dsrlnin_claim(irq_t *irq)
  44. {
  45.     return IRQ_ACCEPT;
  46. }
  47.  
  48. static void dsrlnin_irq_handler(irq_t *irq)
  49. {
  50.     dsrlnin_instance_t *instance = irq->instance;
  51.     dsrlnin_t *dev = instance->dsrlnin;
  52.    
  53.     indev_push_character(instance->srlnin, pio_read_8(&dev->data));
  54. }
  55.  
  56. dsrlnin_instance_t *dsrlnin_init(dsrlnin_t *dev, inr_t inr)
  57. {
  58.     dsrlnin_instance_t *instance
  59.         = malloc(sizeof(dsrlnin_instance_t), FRAME_ATOMIC);
  60.     if (instance) {
  61.         instance->dsrlnin = dev;
  62.         instance->srlnin = NULL;
  63.        
  64.         irq_initialize(&instance->irq);
  65.         instance->irq.devno = device_assign_devno();
  66.         instance->irq.inr = inr;
  67.         instance->irq.claim = dsrlnin_claim;
  68.         instance->irq.handler = dsrlnin_irq_handler;
  69.         instance->irq.instance = instance;
  70.     }
  71.    
  72.     return instance;
  73. }
  74.  
  75. void dsrlnin_wire(dsrlnin_instance_t *instance, indev_t *srlnin)
  76. {
  77.     ASSERT(instance);
  78.     ASSERT(srlnin);
  79.    
  80.     instance->srlnin = srlnin;
  81.     irq_register(&instance->irq);
  82. }
  83.  
  84. /** @}
  85.  */
  86.