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  1. /*
  2.  * Copyright (c) 2009 Vineeth Pillai
  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   pl050 keyboard/mouse driver.
  35.  *
  36.  * It takes care of low-level keyboard functions.
  37.  */
  38.  
  39. #include <genarch/drivers/pl050/pl050.h>
  40. #include <arch/asm.h>
  41. #include <console/chardev.h>
  42. #include <mm/slab.h>
  43. #include <ddi/device.h>
  44.  
  45. #define PL050_KEY_RELEASE 0xF0
  46. #define PL050_ESC_KEY   0xE0
  47. #define PL050_CAPS_SCAN_CODE   0x58
  48.  
  49. /** Structure for pl050's IRQ. */
  50. static pl050_t *pl050;
  51.  
  52. static irq_ownership_t pl050_claim(irq_t *irq)
  53. {
  54.     uint8_t status;
  55.     if ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL)
  56.         return IRQ_ACCEPT;
  57.     else {
  58.         return IRQ_DECLINE;
  59.     }
  60. }
  61.  
  62. static void pl050_irq_handler(irq_t *irq)
  63. {
  64.     uint8_t data;
  65.     uint8_t status;
  66.     pl050_instance_t *instance = irq->instance;
  67.    
  68.     while ((status = pio_read_8(pl050->status)) & PL050_STAT_RXFULL) {
  69.         data = pio_read_8(pl050->data);
  70.         indev_push_character(instance->kbrdin, data);
  71.  
  72.     }
  73. }
  74.  
  75. /** Initialize pl050. */
  76. pl050_instance_t *pl050_init(pl050_t *dev, inr_t inr)
  77. {
  78.  
  79.     pl050_instance_t *instance =
  80.         malloc(sizeof(pl050_instance_t), FRAME_ATOMIC);
  81.  
  82.     pl050 = dev;
  83.  
  84.     if (instance) {
  85.         instance->pl050 = dev;
  86.         instance->kbrdin = NULL;
  87.  
  88.         irq_initialize(&instance->irq);
  89.         instance->irq.devno = device_assign_devno();
  90.         instance->irq.inr = inr;
  91.         instance->irq.claim = pl050_claim;
  92.         instance->irq.handler = pl050_irq_handler;
  93.         instance->irq.instance = instance;
  94.     }
  95.  
  96.     return instance;
  97. }
  98.  
  99. void pl050_wire(pl050_instance_t *instance, indev_t *kbrdin)
  100. {
  101.     uint8_t val;
  102.    
  103.     instance->kbrdin = kbrdin;
  104.     irq_register(&instance->irq);
  105.  
  106.     val = PL050_CR_RXINTR | PL050_CR_INTR;
  107.  
  108.     pio_write_8(pl050->ctrl, val);
  109.  
  110.     /* reset the data buffer */
  111.     pio_read_8(pl050->data);
  112.    
  113. }
  114.  
  115.  
  116. /** @}
  117.  */
  118.