mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 13:44:29 +08:00
302 lines
8.7 KiB
C
302 lines
8.7 KiB
C
/***********************************************************************
|
|
*
|
|
* (C) Copyright 2004
|
|
* DENX Software Engineering
|
|
* Wolfgang Denk, wd@denx.de
|
|
* All rights reserved.
|
|
*
|
|
* Keyboard driver
|
|
*
|
|
***********************************************************************/
|
|
|
|
#include <common.h>
|
|
|
|
#include <devices.h>
|
|
#include <keyboard.h>
|
|
|
|
#undef KBG_DEBUG
|
|
|
|
#ifdef KBG_DEBUG
|
|
#define PRINTF(fmt,args...) printf (fmt ,##args)
|
|
#else
|
|
#define PRINTF(fmt,args...)
|
|
#endif
|
|
|
|
|
|
#define DEVNAME "kbd"
|
|
|
|
#define LED_SCR 0x01 /* scroll lock led */
|
|
#define LED_CAP 0x04 /* caps lock led */
|
|
#define LED_NUM 0x02 /* num lock led */
|
|
|
|
#define KBD_BUFFER_LEN 0x20 /* size of the keyboardbuffer */
|
|
|
|
#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
|
|
int ps2ser_check(void);
|
|
#endif
|
|
|
|
static volatile char kbd_buffer[KBD_BUFFER_LEN];
|
|
static volatile int in_pointer = 0;
|
|
static volatile int out_pointer = 0;
|
|
|
|
static unsigned char leds = 0;
|
|
static unsigned char num_lock = 0;
|
|
static unsigned char caps_lock = 0;
|
|
static unsigned char scroll_lock = 0;
|
|
static unsigned char shift = 0;
|
|
static unsigned char ctrl = 0;
|
|
static unsigned char alt = 0;
|
|
static unsigned char e0 = 0;
|
|
|
|
/******************************************************************
|
|
* Queue handling
|
|
******************************************************************/
|
|
|
|
/* puts character in the queue and sets up the in and out pointer */
|
|
static void kbd_put_queue(char data)
|
|
{
|
|
if((in_pointer+1)==KBD_BUFFER_LEN) {
|
|
if(out_pointer==0) {
|
|
return; /* buffer full */
|
|
} else{
|
|
in_pointer=0;
|
|
}
|
|
} else {
|
|
if((in_pointer+1)==out_pointer)
|
|
return; /* buffer full */
|
|
in_pointer++;
|
|
}
|
|
kbd_buffer[in_pointer]=data;
|
|
return;
|
|
}
|
|
|
|
/* test if a character is in the queue */
|
|
static int kbd_testc(void)
|
|
{
|
|
#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
|
|
/* no ISR is used, so received chars must be polled */
|
|
ps2ser_check();
|
|
#endif
|
|
if(in_pointer==out_pointer)
|
|
return(0); /* no data */
|
|
else
|
|
return(1);
|
|
}
|
|
|
|
/* gets the character from the queue */
|
|
static int kbd_getc(void)
|
|
{
|
|
char c;
|
|
while(in_pointer==out_pointer) {
|
|
#if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
|
|
/* no ISR is used, so received chars must be polled */
|
|
ps2ser_check();
|
|
#endif
|
|
;}
|
|
if((out_pointer+1)==KBD_BUFFER_LEN)
|
|
out_pointer=0;
|
|
else
|
|
out_pointer++;
|
|
c=kbd_buffer[out_pointer];
|
|
return (int)c;
|
|
|
|
}
|
|
|
|
/* Simple translation table for the keys */
|
|
|
|
static unsigned char kbd_plain_xlate[] = {
|
|
0xff,0x1b, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=','\b','\t', /* 0x00 - 0x0f */
|
|
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']','\r',0xff, 'a', 's', /* 0x10 - 0x1f */
|
|
'd', 'f', 'g', 'h', 'j', 'k', 'l', ';','\'', '`',0xff,'\\', 'z', 'x', 'c', 'v', /* 0x20 - 0x2f */
|
|
'b', 'n', 'm', ',', '.', '/',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
|
|
0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
|
|
'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
|
|
'\r',0xff,0xff
|
|
};
|
|
|
|
static unsigned char kbd_shift_xlate[] = {
|
|
0xff,0x1b, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+','\b','\t', /* 0x00 - 0x0f */
|
|
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}','\r',0xff, 'A', 'S', /* 0x10 - 0x1f */
|
|
'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',0xff, '|', 'Z', 'X', 'C', 'V', /* 0x20 - 0x2f */
|
|
'B', 'N', 'M', '<', '>', '?',0xff,0xff,0xff, ' ',0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
|
|
0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
|
|
'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
|
|
'\r',0xff,0xff
|
|
};
|
|
|
|
static unsigned char kbd_ctrl_xlate[] = {
|
|
0xff,0x1b, '1',0x00, '3', '4', '5',0x1E, '7', '8', '9', '0',0x1F, '=','\b','\t', /* 0x00 - 0x0f */
|
|
0x11,0x17,0x05,0x12,0x14,0x18,0x15,0x09,0x0f,0x10,0x1b,0x1d,'\n',0xff,0x01,0x13, /* 0x10 - 0x1f */
|
|
0x04,0x06,0x08,0x09,0x0a,0x0b,0x0c, ';','\'', '~',0x00,0x1c,0x1a,0x18,0x03,0x16, /* 0x20 - 0x2f */
|
|
0x02,0x0e,0x0d, '<', '>', '?',0xff,0xff,0xff,0x00,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x30 - 0x3f */
|
|
0xff,0xff,0xff,0xff,0xff,0xff,0xff, '7', '8', '9', '-', '4', '5', '6', '+', '1', /* 0x40 - 0x4f */
|
|
'2', '3', '0', '.',0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0x50 - 0x5F */
|
|
'\r',0xff,0xff
|
|
};
|
|
|
|
|
|
void handle_scancode(unsigned char scancode)
|
|
{
|
|
unsigned char keycode;
|
|
|
|
/* Convert scancode to keycode */
|
|
PRINTF("scancode %x\n",scancode);
|
|
if(scancode==0xe0) {
|
|
e0=1; /* special charakters */
|
|
return;
|
|
}
|
|
if(e0==1) {
|
|
e0=0; /* delete flag */
|
|
if(!( ((scancode&0x7F)==0x38)|| /* the right ctrl key */
|
|
((scancode&0x7F)==0x1D)|| /* the right alt key */
|
|
((scancode&0x7F)==0x35)|| /* the right '/' key */
|
|
((scancode&0x7F)==0x1C) )) /* the right enter key */
|
|
/* we swallow unknown e0 codes */
|
|
return;
|
|
}
|
|
/* special cntrl keys */
|
|
switch(scancode) {
|
|
case 0x2A:
|
|
case 0x36: /* shift pressed */
|
|
shift=1;
|
|
return; /* do nothing else */
|
|
case 0xAA:
|
|
case 0xB6: /* shift released */
|
|
shift=0;
|
|
return; /* do nothing else */
|
|
case 0x38: /* alt pressed */
|
|
alt=1;
|
|
return; /* do nothing else */
|
|
case 0xB8: /* alt released */
|
|
alt=0;
|
|
return; /* do nothing else */
|
|
case 0x1d: /* ctrl pressed */
|
|
ctrl=1;
|
|
return; /* do nothing else */
|
|
case 0x9d: /* ctrl released */
|
|
ctrl=0;
|
|
return; /* do nothing else */
|
|
case 0x46: /* scrollock pressed */
|
|
scroll_lock=~scroll_lock;
|
|
if(scroll_lock==0)
|
|
leds&=~LED_SCR; /* switch LED off */
|
|
else
|
|
leds|=LED_SCR; /* switch on LED */
|
|
pckbd_leds(leds);
|
|
return; /* do nothing else */
|
|
case 0x3A: /* capslock pressed */
|
|
caps_lock=~caps_lock;
|
|
if(caps_lock==0)
|
|
leds&=~LED_CAP; /* switch caps_lock off */
|
|
else
|
|
leds|=LED_CAP; /* switch on LED */
|
|
pckbd_leds(leds);
|
|
return;
|
|
case 0x45: /* numlock pressed */
|
|
num_lock=~num_lock;
|
|
if(num_lock==0)
|
|
leds&=~LED_NUM; /* switch LED off */
|
|
else
|
|
leds|=LED_NUM; /* switch on LED */
|
|
pckbd_leds(leds);
|
|
return;
|
|
case 0xC6: /* scroll lock released */
|
|
case 0xC5: /* num lock released */
|
|
case 0xBA: /* caps lock released */
|
|
return; /* just swallow */
|
|
}
|
|
#if 1
|
|
if((scancode&0x80)==0x80) /* key released */
|
|
return;
|
|
#else
|
|
if((scancode&0x80)==0x00) /* key pressed */
|
|
return;
|
|
scancode &= ~0x80;
|
|
#endif
|
|
/* now, decide which table we need */
|
|
if(scancode > (sizeof(kbd_plain_xlate)/sizeof(kbd_plain_xlate[0]))) { /* scancode not in list */
|
|
PRINTF("unkown scancode %X\n",scancode);
|
|
return; /* swallow it */
|
|
}
|
|
/* setup plain code first */
|
|
keycode=kbd_plain_xlate[scancode];
|
|
if(caps_lock==1) { /* caps_lock is pressed, overwrite plain code */
|
|
if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
|
|
PRINTF("unkown caps-locked scancode %X\n",scancode);
|
|
return; /* swallow it */
|
|
}
|
|
keycode=kbd_shift_xlate[scancode];
|
|
if(keycode<'A') { /* we only want the alphas capital */
|
|
keycode=kbd_plain_xlate[scancode];
|
|
}
|
|
}
|
|
if(shift==1) { /* shift overwrites caps_lock */
|
|
if(scancode > (sizeof(kbd_shift_xlate)/sizeof(kbd_shift_xlate[0]))) { /* scancode not in list */
|
|
PRINTF("unkown shifted scancode %X\n",scancode);
|
|
return; /* swallow it */
|
|
}
|
|
keycode=kbd_shift_xlate[scancode];
|
|
}
|
|
if(ctrl==1) { /* ctrl overwrites caps_lock and shift */
|
|
if(scancode > (sizeof(kbd_ctrl_xlate)/sizeof(kbd_ctrl_xlate[0]))) { /* scancode not in list */
|
|
PRINTF("unkown ctrl scancode %X\n",scancode);
|
|
return; /* swallow it */
|
|
}
|
|
keycode=kbd_ctrl_xlate[scancode];
|
|
}
|
|
/* check if valid keycode */
|
|
if(keycode==0xff) {
|
|
PRINTF("unkown scancode %X\n",scancode);
|
|
return; /* swallow unknown codes */
|
|
}
|
|
|
|
kbd_put_queue(keycode);
|
|
PRINTF("%x\n",keycode);
|
|
}
|
|
|
|
/******************************************************************
|
|
* Init
|
|
******************************************************************/
|
|
|
|
#ifdef CFG_CONSOLE_OVERWRITE_ROUTINE
|
|
extern int overwrite_console (void);
|
|
#define OVERWRITE_CONSOLE overwrite_console ()
|
|
#else
|
|
#define OVERWRITE_CONSOLE 0
|
|
#endif /* CFG_CONSOLE_OVERWRITE_ROUTINE */
|
|
|
|
int kbd_init (void)
|
|
{
|
|
int error;
|
|
device_t kbddev ;
|
|
char *stdinname = getenv ("stdin");
|
|
|
|
if(kbd_init_hw()==-1)
|
|
return -1;
|
|
memset (&kbddev, 0, sizeof(kbddev));
|
|
strcpy(kbddev.name, DEVNAME);
|
|
kbddev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_SYSTEM;
|
|
kbddev.putc = NULL ;
|
|
kbddev.puts = NULL ;
|
|
kbddev.getc = kbd_getc ;
|
|
kbddev.tstc = kbd_testc ;
|
|
|
|
error = device_register (&kbddev);
|
|
if(error==0) {
|
|
/* check if this is the standard input device */
|
|
if(strcmp(stdinname,DEVNAME)==0) {
|
|
/* reassign the console */
|
|
if(OVERWRITE_CONSOLE) {
|
|
return 1;
|
|
}
|
|
error=console_assign(stdin,DEVNAME);
|
|
if(error==0)
|
|
return 1;
|
|
else
|
|
return error;
|
|
}
|
|
return 1;
|
|
}
|
|
return error;
|
|
}
|