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  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/z8530.h>
  42. #include <arch/drivers/kbd.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_interrupt(int n, istate_t *istate);
  68. void z8530_wait(void);
  69.  
  70. /** Initialize keyboard and service interrupts using kernel routine */
  71. void z8530_grab(void)
  72. {
  73. }
  74. /** Resume the former interrupt vector */
  75. void z8530_release(void)
  76. {
  77. }
  78.  
  79. #include <print.h>
  80.  
  81. /** Initialize z8530. */
  82. void z8530_init(void)
  83. {
  84.     chardev_initialize("z8530_kbd", &kbrd, &ops);
  85.     stdin = &kbrd;
  86.  
  87.     z8530_write_a(WR1, WR1_IARCSC); /* interrupt on all characters */
  88.     z8530_write_a(WR2, 12);     /* FIXME: IRQ12 ??? */
  89.  
  90.     /* 8 bits per character and enable receiver */
  91.     z8530_write_a(WR3, WR3_RX8BITSCH | WR3_RX_ENABLE);
  92.    
  93.     z8530_write_a(WR9, WR9_MIE);    /* Master Interrupt Enable. */
  94. }
  95.  
  96. /** Process z8530 interrupt.
  97.  *
  98.  * @param n Interrupt vector.
  99.  * @param istate Interrupted state.
  100.  */
  101. void z8530_interrupt(int n, istate_t *istate)
  102. {
  103. }
  104.  
  105. /** Wait until the controller reads its data. */
  106. void z8530_wait(void) {
  107. }
  108.  
  109. /* Called from getc(). */
  110. void z8530_resume(chardev_t *d)
  111. {
  112. }
  113.  
  114. /* Called from getc(). */
  115. void z8530_suspend(chardev_t *d)
  116. {
  117. }
  118.  
  119. char key_read(chardev_t *d)
  120. {
  121.     char ch;   
  122.  
  123.     while(!(ch = active_read_buff_read())) {
  124.         uint8_t x;
  125.         while (!(z8530_read_a(RR0) & RR0_RCA))
  126.             ;
  127.         x = z8530_read_a(RR8);
  128.         if (x != IGNORE_CODE) {
  129.             if (x & KEY_RELEASE)
  130.                 key_released(x ^ KEY_RELEASE);
  131.             else
  132.                 active_read_key_pressed(x);
  133.         }
  134.     }
  135.     return ch;
  136. }
  137.  
  138. /** Poll for key press and release events.
  139.  *
  140.  * This function can be used to implement keyboard polling.
  141.  */
  142. void z8530_poll(void)
  143. {
  144.     uint8_t x;
  145.  
  146.     while (z8530_read_a(RR0) & RR0_RCA) {
  147.         x = z8530_read_a(RR8);
  148.         if (x != IGNORE_CODE) {
  149.             if (x & KEY_RELEASE)
  150.                 key_released(x ^ KEY_RELEASE);
  151.             else
  152.                 key_pressed(x);
  153.         }
  154.     }
  155. }
  156.  
  157. /** @}
  158.  */
  159.