WebSVN – HelenOS-historic – Diff – /kernel/trunk/arch/ia32/src/drivers/i8042.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.
  */
 #include <arch/i8042.h>
 #include <arch/i8259.h>
 #include <arch/interrupt.h>
 #include <cpu.h>
 #include <arch/asm.h>
 #include <arch.h>
 #include <print.h>
 #include <synch/spinlock.h>
 #include <typedefs.h>
 #include <console/chardev.h>
 #include <console/console.h>
 #include <macros.h>
 #include <interrupt.h>
 /**
  * i8042 processor driver.
  * It takes care of low-level keyboard functions.
  */
 #define i8042_DATA      0x60
 #define i8042_STATUS        0x64
+#define i8042_BUFFER_FULL_MASK      0x01
 /** Keyboard commands. */
 #define KBD_ENABLE  0xf4
 #define KBD_DISABLE 0xf5
 #define KBD_ACK     0xfa
 /*
   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 0x49
 #define i8042_WAIT_MASK 0x02
 #define SPECIAL     '?'
 #define KEY_RELEASE 0x80
 static void key_released(__u8 sc);
 static void key_pressed(__u8 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*/
+__u8 active_read_buff[ACTIVE_READ_BUFF_SIZE]={0};
 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
+    .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, void *stack);
 /** Initialize i8042. */
 void i8042_init(void)
+{
     exc_register(VECTOR_KBD, "i8042_interrupt", i8042_interrupt);
     while (inb(i8042_STATUS)&i8042_WAIT_MASK);     /*Wait*/
     outb(i8042_STATUS,i8042_SET_COMMAND);
     while (inb(i8042_STATUS)&i8042_WAIT_MASK);     /*Wait*/
     outb(i8042_DATA,i8042_COMMAND);
     trap_virtual_enable_irqs(1<<IRQ_KBD);
     chardev_initialize("i8042_kbd", &kbrd, &ops);
     stdin = &kbrd;
+}
 /** Process i8042 interrupt.
+ *
  * @param n Interrupt vector.
  * @param stack Interrupted stack.
  */
 void i8042_interrupt(int n, void *stack)
+{
     __u8 x;
     trap_virtual_eoi();
     x = inb(i8042_DATA);
     if (x & KEY_RELEASE)
         key_released(x ^ KEY_RELEASE);
     else
         key_pressed(x);
+}
 /** Process release of key.
+ *
  * @param sc Scancode of the key being released.
  */
 void key_released(__u8 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(__u8 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 __u8 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(__u8 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_readed_key_pressed(__u8 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()))
+    {
+        __u8 x;
+        while (!((x=inb(i8042_STATUS))&i8042_BUFFER_FULL_MASK));
+        x = inb(i8042_DATA);
+        if (x & KEY_RELEASE)
+            key_released(x ^ KEY_RELEASE);
+        else
+            active_readed_key_pressed(x);
+    }
+    return ch;
+}

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/arch/ia32/src/drivers/i8042.c – Rev 671 → 878