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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * Copyright (C) 2006 Josef Cejka
  4.  * All rights reserved.
  5.  *
  6.  * Redistribution and use in source and binary forms, with or without
  7.  * modification, are permitted provided that the following conditions
  8.  * are met:
  9.  *
  10.  * - Redistributions of source code must retain the above copyright
  11.  *   notice, this list of conditions and the following disclaimer.
  12.  * - Redistributions in binary form must reproduce the above copyright
  13.  *   notice, this list of conditions and the following disclaimer in the
  14.  *   documentation and/or other materials provided with the distribution.
  15.  * - The name of the author may not be used to endorse or promote products
  16.  *   derived from this software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28.  */
  29.  
  30. /** @addtogroup kbdia32 ia32
  31.  * @brief   HelenOS ia32 / amd64 arch dependent parts of uspace keyboard handler.
  32.  * @ingroup  kbd
  33.  * @{
  34.  */
  35. /** @file
  36.  * @ingroup kbdamd64
  37.  */
  38.  
  39. #include <arch/kbd.h>
  40. #include <ipc/ipc.h>
  41. #include <unistd.h>
  42. #include <kbd.h>
  43. #include <keys.h>
  44. #include <genarch/kbd.h>
  45.  
  46. /* Interesting bits for status register */
  47. #define i8042_OUTPUT_FULL  0x1
  48. #define i8042_INPUT_FULL   0x2
  49. #define i8042_MOUSE_DATA   0x20
  50.  
  51. /* Command constants */
  52. #define i8042_CMD_KBD 0x60
  53. #define i8042_CMD_MOUSE  0xd4
  54.  
  55. /* Keyboard cmd byte */
  56. #define i8042_KBD_IE        0x1
  57. #define i8042_MOUSE_IE      0x2
  58. #define i8042_KBD_DISABLE   0x10
  59. #define i8042_MOUSE_DISABLE 0x20
  60. #define i8042_KBD_TRANSLATE 0x40
  61.  
  62. /* Mouse constants */
  63. #define MOUSE_OUT_INIT  0xf4
  64. #define MOUSE_ACK       0xfa
  65.  
  66. #define KEY_RELEASE 0x80
  67.  
  68. static volatile int keyflags;       /**< Tracking of multiple keypresses. */
  69. static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
  70.  
  71. irq_cmd_t i8042_cmds[2] = {
  72.     { CMD_PORT_READ_1, (void *)0x64, 0, 1 },
  73.     { CMD_PORT_READ_1, (void *)0x60, 0, 2 }
  74. };
  75.  
  76. irq_code_t i8042_kbd = {
  77.     2,
  78.     i8042_cmds
  79. };
  80.  
  81. static void wait_ready(void) {
  82.     while (i8042_status_read() & i8042_INPUT_FULL)
  83.         ;
  84. }
  85.  
  86. /** Register uspace irq handler
  87.  * @return
  88.  */
  89. int kbd_arch_init(void)
  90. {
  91.     int i;
  92.     int mouseenabled = 0;
  93.  
  94.     iospace_enable(task_get_id(),(void *)i8042_DATA, 5);
  95.     /* Disable kbd, enable mouse */
  96.     i8042_command_write(i8042_CMD_KBD);
  97.     wait_ready();
  98.     i8042_command_write(i8042_CMD_KBD);
  99.     wait_ready();
  100.     i8042_data_write(i8042_KBD_DISABLE);
  101.     wait_ready();
  102.  
  103.     /* Flush all current IO */
  104.     while (i8042_status_read() & i8042_OUTPUT_FULL)
  105.         i8042_data_read();
  106.     /* Initialize mouse */
  107.     i8042_command_write(i8042_CMD_MOUSE);
  108.     wait_ready();
  109.     i8042_data_write(MOUSE_OUT_INIT);
  110.     wait_ready();
  111.    
  112.     int mouseanswer = 0;
  113.     for (i=0;i < 1000; i++) {
  114.         int status = i8042_status_read();
  115.         if (status & i8042_OUTPUT_FULL) {
  116.             int data = i8042_data_read();
  117.             if (status & i8042_MOUSE_DATA) {
  118.                 mouseanswer = data;
  119.                 break;
  120.             }
  121.         }
  122.         usleep(1000);
  123.     }
  124.     if (mouseanswer == MOUSE_ACK) {
  125.         /* enable mouse */
  126.         mouseenabled = 1;
  127.  
  128.         ipc_register_irq(MOUSE_IRQ, &i8042_kbd);
  129.     }
  130.     /* Enable kbd */
  131.     ipc_register_irq(KBD_IRQ, &i8042_kbd);
  132.     /* Register for irq restart */
  133.     ipc_register_irq(IPC_IRQ_KBDRESTART, NULL);
  134.  
  135.     int newcontrol = i8042_KBD_IE | i8042_KBD_TRANSLATE;
  136.     if (mouseenabled)
  137.         newcontrol |= i8042_MOUSE_IE;
  138.    
  139.     i8042_command_write(i8042_CMD_KBD);
  140.     wait_ready();
  141.     i8042_data_write(newcontrol);
  142.     wait_ready();
  143.    
  144.     return 0;
  145. }
  146.  
  147. /** Process keyboard & mouse events */
  148. int kbd_arch_process(keybuffer_t *keybuffer, ipc_call_t *call)
  149. {
  150.     int status = IPC_GET_ARG1(*call);
  151.  
  152.     if (IPC_GET_METHOD(*call) == IPC_IRQ_KBDRESTART) {
  153.         kbd_arch_init();
  154.         return 1;
  155.     }
  156.  
  157.     if ((status & i8042_MOUSE_DATA))
  158.         return 0;
  159.    
  160.     int scan_code = IPC_GET_ARG2(*call);
  161.    
  162.     if (scan_code & KEY_RELEASE)
  163.         key_released(keybuffer, scan_code ^ KEY_RELEASE);
  164.     else
  165.         key_pressed(keybuffer, scan_code);
  166.     return  1;
  167. }
  168.  
  169. /**
  170.  * @}
  171.  */
  172.