Subversion Repositories HelenOS

Rev

Rev 1848 | Go to most recent revision | Blame | Last modification | View Log | Download | RSS feed

  1. /*
  2.  * Copyright (C) 2001-2004 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 genarch
  30.  * @{
  31.  */
  32. /**
  33.  * @file
  34.  * @brief   Zilog 8530 serial port / keyboard driver.
  35.  */
  36.  
  37. #include <genarch/kbd/z8530.h>
  38. #include <genarch/kbd/key.h>
  39. #include <genarch/kbd/scanc.h>
  40. #include <genarch/kbd/scanc_sun.h>
  41. #include <arch/drivers/fhc.h>
  42. #include <arch/drivers/z8530.h>
  43. #include <arch/interrupt.h>
  44. #include <cpu.h>
  45. #include <arch/asm.h>
  46. #include <arch.h>
  47. #include <typedefs.h>
  48. #include <console/chardev.h>
  49. #include <console/console.h>
  50. #include <interrupt.h>
  51.  
  52. /*
  53.  * These codes read from z8530 data register are silently ignored.
  54.  */
  55. #define IGNORE_CODE 0x7f        /* all keys up */
  56.  
  57. static void z8530_suspend(chardev_t *);
  58. static void z8530_resume(chardev_t *);
  59.  
  60. chardev_t kbrd;
  61. static chardev_operations_t ops = {
  62.     .suspend = z8530_suspend,
  63.     .resume = z8530_resume,
  64.     .read = key_read
  65. };
  66.  
  67. void z8530_wait(void);
  68.  
  69. /** Initialize keyboard and service interrupts using kernel routine */
  70. void z8530_grab(void)
  71. {
  72. }
  73.  
  74. /** Resume the former interrupt vector */
  75. void z8530_release(void)
  76. {
  77. }
  78.  
  79. /** Initialize z8530. */
  80. void z8530_init(void)
  81. {
  82.     chardev_initialize("z8530_kbd", &kbrd, &ops);
  83.     stdin = &kbrd;
  84.  
  85.     (void) z8530_read_a(RR8);
  86.  
  87.     z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */
  88.  
  89.     /* 8 bits per character and enable receiver */
  90.     z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
  91.    
  92.     z8530_write_a(WR9, WR9_MIE);    /* Master Interrupt Enable. */
  93.    
  94.     /*
  95.      * We need to initialize the FireHose Controller,
  96.      * to which is this z8530 attached. Otherwise
  97.      * interrupts generated by the z8530 would not
  98.      * be forwarded to the CPU.
  99.      */
  100.     fhc_init();
  101. }
  102.  
  103. /** Process z8530 interrupt.
  104.  *
  105.  * @param n Interrupt vector.
  106.  * @param istate Interrupted state.
  107.  */
  108. void z8530_interrupt(void)
  109. {
  110.     z8530_poll();
  111. }
  112.  
  113. /** Wait until the controller reads its data. */
  114. void z8530_wait(void) {
  115. }
  116.  
  117. /* Called from getc(). */
  118. void z8530_resume(chardev_t *d)
  119. {
  120. }
  121.  
  122. /* Called from getc(). */
  123. void z8530_suspend(chardev_t *d)
  124. {
  125. }
  126.  
  127. char key_read(chardev_t *d)
  128. {
  129.     char ch;   
  130.  
  131.     while(!(ch = active_read_buff_read())) {
  132.         uint8_t x;
  133.         while (!(z8530_read_a(RR0) & RR0_RCA))
  134.             ;
  135.         x = z8530_read_a(RR8);
  136.         if (x != IGNORE_CODE) {
  137.             if (x & KEY_RELEASE)
  138.                 key_released(x ^ KEY_RELEASE);
  139.             else
  140.                 active_read_key_pressed(x);
  141.         }
  142.     }
  143.     return ch;
  144. }
  145.  
  146. /** Poll for key press and release events.
  147.  *
  148.  * This function can be used to implement keyboard polling.
  149.  */
  150. void z8530_poll(void)
  151. {
  152.     uint8_t x;
  153.  
  154.     while (z8530_read_a(RR0) & RR0_RCA) {
  155.         x = z8530_read_a(RR8);
  156.         if (x != IGNORE_CODE) {
  157.             if (x & KEY_RELEASE)
  158.                 key_released(x ^ KEY_RELEASE);
  159.             else
  160.                 key_pressed(x);
  161.         }
  162.     }
  163. }
  164.  
  165. /** @}
  166.  */
  167.