/*********************************************************************** * * (C) Copyright 2004 * DENX Software Engineering * Wolfgang Denk, wd@denx.de * All rights reserved. * * Keyboard driver * ***********************************************************************/ #include <common.h> #include <stdio_dev.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 CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE extern int overwrite_console (void); #define OVERWRITE_CONSOLE overwrite_console () #else #define OVERWRITE_CONSOLE 0 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */ int kbd_init (void) { int error; struct stdio_dev 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 = stdio_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; }