WebSVN – HelenOS – Diff – /trunk/kernel/genarch/src/kbd/key.c

 /*
  * Copyright (C) 2001-2004 Jakub Jermar
  * All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
+ *
  * - Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  * - Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  * - The name of the author may not be used to endorse or promote products
  *   derived from this software without specific prior written permission.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 /** @addtogroup genarch
  * @{
  */
 /**
  * @file
  * @brief   i8042 processor driver.
+ *
  * It takes care of low-level keyboard functions.
  */
 #include <genarch/i8042/i8042.h>
 #include <arch/drivers/i8042.h>
 #include <arch/interrupt.h>
 #include <cpu.h>
 #include <arch/asm.h>
 #include <arch.h>
 #include <synch/spinlock.h>
 #include <typedefs.h>
 #include <console/chardev.h>
 #include <console/console.h>
 #include <macros.h>
 #include <interrupt.h>
 /* Keyboard commands. */
 #define KBD_ENABLE  0xf4
 #define KBD_DISABLE 0xf5
 #define KBD_ACK     0xfa
 /*
  * 60  Write 8042 Command Byte: next data byte written to port 60h is
  *     placed in 8042 command register. Format:
+ *
  *    |7|6|5|4|3|2|1|0|8042 Command Byte
  *     | | | | | | | `---- 1=enable output register full interrupt
  *     | | | | | | `----- should be 0
  *     | | | | | `------ 1=set status register system, 0=clear
  *     | | | | `------- 1=override keyboard inhibit, 0=allow inhibit
  *     | | | `-------- disable keyboard I/O by driving clock line low
  *     | | `--------- disable auxiliary device, drives clock line low
  *     | `---------- IBM scancode translation 0=AT, 1=PC/XT
  *     `----------- reserved, should be 0
  */
 #define i8042_SET_COMMAND   0x60
 #define i8042_COMMAND       0x69
 #define i8042_BUFFER_FULL_MASK  0x01
 #define i8042_WAIT_MASK     0x02
 #define i8042_MOUSE_DATA        0x20
-#define SPECIAL     '?'
 #define KEY_RELEASE 0x80
 /**
  * These codes read from i8042 data register are silently ignored.
  */
 #define IGNORE_CODE 0x7f
 static void key_released(uint8_t sc);
 static void key_pressed(uint8_t sc);
 static char key_read(chardev_t *d);
 #define PRESSED_SHIFT       (1<<0)
 #define PRESSED_CAPSLOCK    (1<<1)
 #define LOCKED_CAPSLOCK     (1<<0)
 #define ACTIVE_READ_BUFF_SIZE 16    /* Must be power of 2 */
 static uint8_t active_read_buff[ACTIVE_READ_BUFF_SIZE];
 SPINLOCK_INITIALIZE(keylock);       /**< keylock protects keyflags and lockflags. */
 static volatile int keyflags;       /**< Tracking of multiple keypresses. */
 static volatile int lockflags;      /**< Tracking of multiple keys lockings. */
 static void i8042_suspend(chardev_t *);
 static void i8042_resume(chardev_t *);
 static chardev_t kbrd;
 static chardev_operations_t ops = {
     .suspend = i8042_suspend,
     .resume = i8042_resume,
     .read = key_read
 };
-/** Primary meaning of scancodes. */
-static char sc_primary_map[] = {
-    SPECIAL, /* 0x00 */
-    SPECIAL, /* 0x01 - Esc */
-    '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
-    '\b', /* 0x0e - Backspace */
-    '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', '\n',
-    SPECIAL, /* 0x1d - LCtrl */
-    'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'',
-    '`',
-    SPECIAL, /* 0x2a - LShift */
-    '\\',
-    'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
-    SPECIAL, /* 0x36 - RShift */
-    '*',
-    SPECIAL, /* 0x38 - LAlt */
-    ' ',
-    SPECIAL, /* 0x3a - CapsLock */
-    SPECIAL, /* 0x3b - F1 */
-    SPECIAL, /* 0x3c - F2 */
-    SPECIAL, /* 0x3d - F3 */
-    SPECIAL, /* 0x3e - F4 */
-    SPECIAL, /* 0x3f - F5 */
-    SPECIAL, /* 0x40 - F6 */
-    SPECIAL, /* 0x41 - F7 */
-    SPECIAL, /* 0x42 - F8 */
-    SPECIAL, /* 0x43 - F9 */
-    SPECIAL, /* 0x44 - F10 */
-    SPECIAL, /* 0x45 - NumLock */
-    SPECIAL, /* 0x46 - ScrollLock */
-    '7', '8', '9', '-',
-    '4', '5', '6', '+',
-    '1', '2', '3',
-    '0', '.',
-    SPECIAL, /* 0x54 - Alt-SysRq */
-    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
-    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
-    SPECIAL, /* 0x57 - F11 */
-    SPECIAL, /* 0x58 - F12 */
-    SPECIAL, /* 0x59 */
-    SPECIAL, /* 0x5a */
-    SPECIAL, /* 0x5b */
-    SPECIAL, /* 0x5c */
-    SPECIAL, /* 0x5d */
-    SPECIAL, /* 0x5e */
-    SPECIAL, /* 0x5f */
-    SPECIAL, /* 0x60 */
-    SPECIAL, /* 0x61 */
-    SPECIAL, /* 0x62 */
-    SPECIAL, /* 0x63 */
-    SPECIAL, /* 0x64 */
-    SPECIAL, /* 0x65 */
-    SPECIAL, /* 0x66 */
-    SPECIAL, /* 0x67 */
-    SPECIAL, /* 0x68 */
-    SPECIAL, /* 0x69 */
-    SPECIAL, /* 0x6a */
-    SPECIAL, /* 0x6b */
-    SPECIAL, /* 0x6c */
-    SPECIAL, /* 0x6d */
-    SPECIAL, /* 0x6e */
-    SPECIAL, /* 0x6f */
-    SPECIAL, /* 0x70 */
-    SPECIAL, /* 0x71 */
-    SPECIAL, /* 0x72 */
-    SPECIAL, /* 0x73 */
-    SPECIAL, /* 0x74 */
-    SPECIAL, /* 0x75 */
-    SPECIAL, /* 0x76 */
-    SPECIAL, /* 0x77 */
-    SPECIAL, /* 0x78 */
-    SPECIAL, /* 0x79 */
-    SPECIAL, /* 0x7a */
-    SPECIAL, /* 0x7b */
-    SPECIAL, /* 0x7c */
-    SPECIAL, /* 0x7d */
-    SPECIAL, /* 0x7e */
-    SPECIAL, /* 0x7f */
-};
-/** Secondary meaning of scancodes. */
-static char sc_secondary_map[] = {
-    SPECIAL, /* 0x00 */
-    SPECIAL, /* 0x01 - Esc */
-    '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
-    SPECIAL, /* 0x0e - Backspace */
-    '\t', 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', '\n',
-    SPECIAL, /* 0x1d - LCtrl */
-    'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"',
-    '~',
-    SPECIAL, /* 0x2a - LShift */
-    '|',
-    'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?',
-    SPECIAL, /* 0x36 - RShift */
-    '*',
-    SPECIAL, /* 0x38 - LAlt */
-    ' ',
-    SPECIAL, /* 0x3a - CapsLock */
-    SPECIAL, /* 0x3b - F1 */
-    SPECIAL, /* 0x3c - F2 */
-    SPECIAL, /* 0x3d - F3 */
-    SPECIAL, /* 0x3e - F4 */
-    SPECIAL, /* 0x3f - F5 */
-    SPECIAL, /* 0x40 - F6 */
-    SPECIAL, /* 0x41 - F7 */
-    SPECIAL, /* 0x42 - F8 */
-    SPECIAL, /* 0x43 - F9 */
-    SPECIAL, /* 0x44 - F10 */
-    SPECIAL, /* 0x45 - NumLock */
-    SPECIAL, /* 0x46 - ScrollLock */
-    '7', '8', '9', '-',
-    '4', '5', '6', '+',
-    '1', '2', '3',
-    '0', '.',
-    SPECIAL, /* 0x54 - Alt-SysRq */
-    SPECIAL, /* 0x55 - F11/F12/PF1/FN */
-    SPECIAL, /* 0x56 - unlabelled key next to LAlt */
-    SPECIAL, /* 0x57 - F11 */
-    SPECIAL, /* 0x58 - F12 */
-    SPECIAL, /* 0x59 */
-    SPECIAL, /* 0x5a */
-    SPECIAL, /* 0x5b */
-    SPECIAL, /* 0x5c */
-    SPECIAL, /* 0x5d */
-    SPECIAL, /* 0x5e */
-    SPECIAL, /* 0x5f */
-    SPECIAL, /* 0x60 */
-    SPECIAL, /* 0x61 */
-    SPECIAL, /* 0x62 */
-    SPECIAL, /* 0x63 */
-    SPECIAL, /* 0x64 */
-    SPECIAL, /* 0x65 */
-    SPECIAL, /* 0x66 */
-    SPECIAL, /* 0x67 */
-    SPECIAL, /* 0x68 */
-    SPECIAL, /* 0x69 */
-    SPECIAL, /* 0x6a */
-    SPECIAL, /* 0x6b */
-    SPECIAL, /* 0x6c */
-    SPECIAL, /* 0x6d */
-    SPECIAL, /* 0x6e */
-    SPECIAL, /* 0x6f */
-    SPECIAL, /* 0x70 */
-    SPECIAL, /* 0x71 */
-    SPECIAL, /* 0x72 */
-    SPECIAL, /* 0x73 */
-    SPECIAL, /* 0x74 */
-    SPECIAL, /* 0x75 */
-    SPECIAL, /* 0x76 */
-    SPECIAL, /* 0x77 */
-    SPECIAL, /* 0x78 */
-    SPECIAL, /* 0x79 */
-    SPECIAL, /* 0x7a */
-    SPECIAL, /* 0x7b */
-    SPECIAL, /* 0x7c */
-    SPECIAL, /* 0x7d */
-    SPECIAL, /* 0x7e */
-    SPECIAL, /* 0x7f */
-};
 static void i8042_interrupt(int n, istate_t *istate);
 static void i8042_wait(void);
 static iroutine oldvector;
 /** Initialize keyboard and service interrupts using kernel routine */
 void i8042_grab(void)
+{
     oldvector = exc_register(VECTOR_KBD, "i8042_interrupt", (iroutine) i8042_interrupt);
     i8042_wait();
     i8042_command_write(i8042_SET_COMMAND);
     i8042_wait();
     i8042_data_write(i8042_COMMAND);
     i8042_wait();
+}
 /** Resume the former interrupt vector */
 void i8042_release(void)
+{
     if (oldvector)
         exc_register(VECTOR_KBD, "user_interrupt", oldvector);
+}
 /** Initialize i8042. */
 void i8042_init(void)
+{
     int i;
     i8042_grab();
         /* Prevent user from accidentaly releasing calling i8042_resume
      * and disabling keyboard
      */
     oldvector = NULL;
     trap_virtual_enable_irqs(1<<IRQ_KBD);
     chardev_initialize("i8042_kbd", &kbrd, &ops);
     stdin = &kbrd;
     /*
      * Clear input buffer.
      * Number of iterations is limited to prevent infinite looping.
      */
     for (i = 0; (i8042_status_read() & i8042_BUFFER_FULL_MASK) && i < 100; i++) {
         i8042_data_read();
+    }
+}
 /** Process i8042 interrupt.
+ *
  * @param n Interrupt vector.
  * @param istate Interrupted state.
  */
 void i8042_interrupt(int n, istate_t *istate)
+{
     uint8_t x;
     uint8_t status;
     while (((status=i8042_status_read()) & i8042_BUFFER_FULL_MASK)) {
         x = i8042_data_read();
         if ((status & i8042_MOUSE_DATA))
             continue;
         if (x & KEY_RELEASE)
             key_released(x ^ KEY_RELEASE);
         else
             key_pressed(x);
+    }
     trap_virtual_eoi();
+}
 /** Wait until the controller reads its data. */
 void i8042_wait(void) {
     while (i8042_status_read() & i8042_WAIT_MASK) {
         /* wait */
+    }
+}
 /** Process release of key.
+ *
  * @param sc Scancode of the key being released.
  */
 void key_released(uint8_t sc)
+{
     spinlock_lock(&keylock);
     switch (sc) {
         case SC_LSHIFT:
         case SC_RSHIFT:
         keyflags &= ~PRESSED_SHIFT;
         break;
         case SC_CAPSLOCK:
         keyflags &= ~PRESSED_CAPSLOCK;
         if (lockflags & LOCKED_CAPSLOCK)
             lockflags &= ~LOCKED_CAPSLOCK;
         else
             lockflags |= LOCKED_CAPSLOCK;
         break;
         default:
         break;
+    }
     spinlock_unlock(&keylock);
+}
 /** Process keypress.
+ *
  * @param sc Scancode of the key being pressed.
  */
 void key_pressed(uint8_t sc)
+{
     char *map = sc_primary_map;
     char ascii = sc_primary_map[sc];
     bool shift, capslock;
     bool letter = false;
     spinlock_lock(&keylock);
     switch (sc) {
     case SC_LSHIFT:
     case SC_RSHIFT:
             keyflags |= PRESSED_SHIFT;
         break;
     case SC_CAPSLOCK:
         keyflags |= PRESSED_CAPSLOCK;
         break;
     case SC_SPEC_ESCAPE:
         break;
     case SC_LEFTARR:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x5b);
         chardev_push_character(&kbrd, 0x44);
         break;
     case SC_RIGHTARR:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x5b);
         chardev_push_character(&kbrd, 0x43);
         break;
     case SC_UPARR:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x5b);
         chardev_push_character(&kbrd, 0x41);
         break;
     case SC_DOWNARR:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x5b);
         chardev_push_character(&kbrd, 0x42);
         break;
     case SC_HOME:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x4f);
         chardev_push_character(&kbrd, 0x48);
         break;
     case SC_END:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x4f);
         chardev_push_character(&kbrd, 0x46);
         break;
     case SC_DELETE:
         chardev_push_character(&kbrd, 0x1b);
         chardev_push_character(&kbrd, 0x5b);
         chardev_push_character(&kbrd, 0x33);
         chardev_push_character(&kbrd, 0x7e);
         break;
     default:
             letter = is_lower(ascii);
         capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
         shift = keyflags & PRESSED_SHIFT;
         if (letter && capslock)
             shift = !shift;
         if (shift)
             map = sc_secondary_map;
         chardev_push_character(&kbrd, map[sc]);
         break;
+    }
     spinlock_unlock(&keylock);
+}
 /* Called from getc(). */
 void i8042_resume(chardev_t *d)
+{
+}
 /* Called from getc(). */
 void i8042_suspend(chardev_t *d)
+{
+}
 static uint8_t active_read_buff_read(void)
+{
     static int i=0;
     i &= (ACTIVE_READ_BUFF_SIZE-1);
     if(!active_read_buff[i]) {
         return 0;
+    }
     return active_read_buff[i++];
+}
 static void active_read_buff_write(uint8_t ch)
+{
     static int i=0;
     active_read_buff[i] = ch;
     i++;
     i &= (ACTIVE_READ_BUFF_SIZE-1);
     active_read_buff[i]=0;
+}
 static void active_read_key_pressed(uint8_t sc)
+{
     char *map = sc_primary_map;
     char ascii = sc_primary_map[sc];
     bool shift, capslock;
     bool letter = false;
     /*spinlock_lock(&keylock);*/
     switch (sc) {
     case SC_LSHIFT:
     case SC_RSHIFT:
             keyflags |= PRESSED_SHIFT;
         break;
     case SC_CAPSLOCK:
         keyflags |= PRESSED_CAPSLOCK;
         break;
     case SC_SPEC_ESCAPE:
         break;
     case SC_LEFTARR:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x5b);
         active_read_buff_write(0x44);
         break;
     case SC_RIGHTARR:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x5b);
         active_read_buff_write(0x43);
         break;
     case SC_UPARR:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x5b);
         active_read_buff_write(0x41);
         break;
     case SC_DOWNARR:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x5b);
         active_read_buff_write(0x42);
         break;
     case SC_HOME:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x4f);
         active_read_buff_write(0x48);
         break;
     case SC_END:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x4f);
         active_read_buff_write(0x46);
         break;
     case SC_DELETE:
         active_read_buff_write(0x1b);
         active_read_buff_write(0x5b);
         active_read_buff_write(0x33);
         active_read_buff_write(0x7e);
         break;
     default:
             letter = is_lower(ascii);
         capslock = (keyflags & PRESSED_CAPSLOCK) || (lockflags & LOCKED_CAPSLOCK);
         shift = keyflags & PRESSED_SHIFT;
         if (letter && capslock)
             shift = !shift;
         if (shift)
             map = sc_secondary_map;
         active_read_buff_write(map[sc]);
         break;
+    }
     /*spinlock_unlock(&keylock);*/
+}
 static char key_read(chardev_t *d)
+{
     char ch;
     while(!(ch = active_read_buff_read())) {
         uint8_t x;
         while (!(i8042_status_read() & i8042_BUFFER_FULL_MASK))
+            ;
         x = i8042_data_read();
         if (x != IGNORE_CODE) {
             if (x & KEY_RELEASE)
                 key_released(x ^ KEY_RELEASE);
             else
                 active_read_key_pressed(x);
+        }
+    }
     return ch;
+}
 /** Poll for key press and release events.
+ *
  * This function can be used to implement keyboard polling.
  */
 void i8042_poll(void)
+{
     uint8_t x;
     while (((x = i8042_status_read() & i8042_BUFFER_FULL_MASK))) {
         x = i8042_data_read();
         if (x != IGNORE_CODE) {
             if (x & KEY_RELEASE)
                 key_released(x ^ KEY_RELEASE);
             else
                 key_pressed(x);
+        }
+    }
+}
 /** @}
  */

Subversion Repositories HelenOS

(root)/trunk/kernel/genarch/src/kbd/key.c @ 2114 – Rev 1787 → 1838