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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 kbd_port
  31.  * @ingroup kbd
  32.  * @{
  33.  */
  34. /** @file
  35.  * @brief i8042 port driver.
  36.  */
  37.  
  38. #include <ipc/ipc.h>
  39. #include <async.h>
  40. #include <unistd.h>
  41. #include <sysinfo.h>
  42. #include <kbd_port.h>
  43. #include <kbd.h>
  44. #include "i8042.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. static irq_cmd_t i8042_cmds[2] = {
  67.     { CMD_PORT_READ_1, (void *) 0x64, 0, 1 },
  68.     { CMD_PORT_READ_1, (void *) 0x60, 0, 2 }
  69. };
  70.  
  71. static irq_code_t i8042_kbd = {
  72.     2,
  73.     i8042_cmds
  74. };
  75.  
  76. static void wait_ready(void) {
  77.     while (i8042_status_read() & i8042_INPUT_FULL)
  78.         ;
  79. }
  80.  
  81. static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call);
  82.  
  83. int kbd_port_init(void)
  84. {
  85. //  int i;
  86.     int mouseenabled = 0;
  87.  
  88.     async_set_interrupt_received(i8042_irq_handler);
  89.     iospace_enable(task_get_id(), (void *) i8042_DATA, 5);
  90.  
  91.     /* Disable kbd, enable mouse */
  92.     i8042_command_write(i8042_CMD_KBD);
  93.     wait_ready();
  94.     i8042_command_write(i8042_CMD_KBD);
  95.     wait_ready();
  96.     i8042_data_write(i8042_KBD_DISABLE);
  97.     wait_ready();
  98.  
  99.     /* Flush all current IO */
  100.     while (i8042_status_read() & i8042_OUTPUT_FULL)
  101.         i8042_data_read();
  102.    
  103.     /* Initialize mouse */
  104. /*  i8042_command_write(i8042_CMD_MOUSE);
  105.     wait_ready();
  106.     i8042_data_write(MOUSE_OUT_INIT);
  107.     wait_ready();
  108.    
  109.     int mouseanswer = 0;
  110.     for (i=0;i < 1000; i++) {
  111.         int status = i8042_status_read();
  112.         if (status & i8042_OUTPUT_FULL) {
  113.             int data = i8042_data_read();
  114.             if (status & i8042_MOUSE_DATA) {
  115.                 mouseanswer = data;
  116.                 break;
  117.             }
  118.         }
  119.         usleep(1000);
  120.     }*/
  121. //  if (mouseanswer == MOUSE_ACK) {
  122. //      /* enable mouse */
  123. //      mouseenabled = 1;
  124. //     
  125. //      ipc_register_irq(sysinfo_value("mouse.inr"), sysinfo_value("mouse.devno"), 0, &i8042_kbd);
  126. //  }
  127.  
  128.     /* Enable kbd */
  129.     ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"), 0, &i8042_kbd);
  130.  
  131.     int newcontrol = i8042_KBD_IE | i8042_KBD_TRANSLATE;
  132.     if (mouseenabled)
  133.         newcontrol |= i8042_MOUSE_IE;
  134.    
  135.     i8042_command_write(i8042_CMD_KBD);
  136.     wait_ready();
  137.     i8042_data_write(newcontrol);
  138.     wait_ready();
  139.    
  140.     return 0;
  141. }
  142.  
  143. static void i8042_irq_handler(ipc_callid_t iid, ipc_call_t *call)
  144. {
  145.     int status = IPC_GET_ARG1(*call);
  146.  
  147.     if ((status & i8042_MOUSE_DATA))
  148.         return 0;
  149.  
  150.     int scan_code = IPC_GET_ARG2(*call);
  151.  
  152.     kbd_push_scancode(scan_code);
  153.     return 1;
  154. }
  155.  
  156. /**
  157.  * @}
  158.  */
  159.