2002/0417/pc/kbd.c (diff list | history)

pc/kbd.c on 1991/0702
1991/0702		#include "u.h"
1992/0321		#include "../port/lib.h"
1991/0706		#include "mem.h"
1991/0702		#include "dat.h" #include "fns.h"
1991/0703		#include "io.h"
1992/1017		#include "../port/error.h"
1991/0702		enum {
1997/0327		Data= 0x60, /* data port */
1991/0702
1997/0327		Status= 0x64, /* status port */ Inready= 0x01, /* input character ready */ Outbusy= 0x02, /* output busy */ Sysflag= 0x04, /* system flag */ Cmddata= 0x08, /* cmd==0, data==1 */ Inhibit= 0x10, /* keyboard/mouse inhibited */ Minready= 0x20, /* mouse character ready */ Rtimeout= 0x40, /* general timeout */
1991/0731		Parity= 0x80,
1991/0702
1997/0327		Cmd= 0x64, /* command port (write only) */
1991/0730
1997/0327		Spec= 0x80,
1993/0915
1997/0327		PF= Spec|0x20, /* num pad function key */ View= Spec|0x00, /* view (shift window up) */
1999/1005		KF= 0xF000, /* function key (begin Unicode private space) */
1997/0327		Shift= Spec|0x60, Break= Spec|0x61, Ctrl= Spec|0x62, Latin= Spec|0x63, Caps= Spec|0x64, Num= Spec|0x65, Middle= Spec|0x66, No= 0x00, /* peter */
1991/0703
1997/0327		Home= KF|13, Up= KF|14, Pgup= KF|15, Print= KF|16,
1999/1005		Left= KF|17, Right= KF|18,
1997/0327		End= '\r', Down= View,
1999/1005		Pgdown= KF|19,
1997/0327		Ins= KF|20, Del= 0x7F,
1999/1207		Scroll= KF|21,
1991/0702		};
2000/0107		/* * The codes at 0x79 and 0x81 are produed by the PFU Happy Hacking keyboard. * A 'standard' keyboard doesn't produce anything above 0x58. */
1999/1005		Rune kbtab[] =
1991/0702		{
1991/0703		[0x00] No, 0x1b, '1', '2', '3', '4', '5', '6',
1991/0702		[0x08] '7', '8', '9', '0', '-', '=', '\b', '\t',
1991/0703		[0x10] 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', [0x18] 'o', 'p', '[', ']', '\n', Ctrl, 'a', 's', [0x20] 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', [0x28] '\'', '`', Shift, '\\', 'z', 'x', 'c', 'v',
1992/0806		[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, '*',
1991/0911		[0x38] Latin, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
1999/1207		[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
1992/0806		[0x48] '8', '9', '-', '4', '5', '6', '+', '1', [0x50] '2', '3', '0', '.', No, No, No, KF|11,
1991/0731		[0x58] KF|12, No, No, No, No, No, No, No,
1998/1006		[0x60] No, No, No, No, No, No, No, No, [0x68] No, No, No, No, No, No, No, No, [0x70] No, No, No, No, No, No, No, No,
2000/0107		[0x78] No, View, No, Up, No, No, No, No,
1991/0702		};
1999/1005		Rune kbtabshift[] =
1991/0703		{ [0x00] No, 0x1b, '!', '@', '#', '$', '%', '^', [0x08] '&', '*', '(', ')', '_', '+', '\b', '\t', [0x10] 'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', [0x18] 'O', 'P', '{', '}', '\n', Ctrl, 'A', 'S', [0x20] 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', [0x28] '"', '~', Shift, '|', 'Z', 'X', 'C', 'V',
1992/0806		[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, '*',
1991/0911		[0x38] Latin, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
1999/1207		[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, Scroll, '7',
1992/0806		[0x48] '8', '9', '-', '4', '5', '6', '+', '1', [0x50] '2', '3', '0', '.', No, No, No, KF|11,
1991/0731		[0x58] KF|12, No, No, No, No, No, No, No,
1998/1006		[0x60] No, No, No, No, No, No, No, No, [0x68] No, No, No, No, No, No, No, No, [0x70] No, No, No, No, No, No, No, No,
2000/0107		[0x78] No, Up, No, Up, No, No, No, No,
1991/0703		};
1999/1005		Rune kbtabesc1[] =
1991/0703		{ [0x00] No, No, No, No, No, No, No, No, [0x08] No, No, No, No, No, No, No, No, [0x10] No, No, No, No, No, No, No, No,
1992/0806		[0x18] No, No, No, No, '\n', Ctrl, No, No,
1991/0703		[0x20] No, No, No, No, No, No, No, No,
1992/0806		[0x28] No, No, Shift, No, No, No, No, No, [0x30] No, No, No, No, No, '/', No, Print,
1991/0703		[0x38] Latin, No, No, No, No, No, No, No, [0x40] No, No, No, No, No, No, Break, Home,
1992/0806		[0x48] Up, Pgup, No, Left, No, Right, No, End, [0x50] Down, Pgdown, Ins, Del, No, No, No, No,
1991/0703		[0x58] No, No, No, No, No, No, No, No,
1998/1006		[0x60] No, No, No, No, No, No, No, No, [0x68] No, No, No, No, No, No, No, No, [0x70] No, No, No, No, No, No, No, No,
2000/0107		[0x78] No, Up, No, No, No, No, No, No,
1991/0703		};
1992/0904		enum {
1992/1015		/* controller command byte */ Cscs1= (1<<6), /* scan code set 1 */
1997/0327		Cauxdis= (1<<5), /* mouse disable */
1992/1015		Ckbddis= (1<<4), /* kbd disable */ Csf= (1<<2), /* system flag */
1997/0327		Cauxint= (1<<1), /* mouse interrupt enable */
1992/1015		Ckbdint= (1<<0), /* kbd interrupt enable */
1992/0904		};
1991/0703
1997/0327		static Lock i8042lock; static uchar ccc; static void (*auxputc)(int, int);
1991/0803		/* * wait for output no longer busy */ static int outready(void)
1991/0731		{
1991/0803		int tries;
1992/1015		for(tries = 0; (inb(Status) & Outbusy); tries++){ if(tries > 500)
1991/0803		return -1;
1992/1015		delay(2); }
1991/0803		return 0; } /* * wait for input */ static int inready(void) { int tries;
1992/1015		for(tries = 0; !(inb(Status) & Inready); tries++){ if(tries > 500)
1991/0803		return -1;
1992/1015		delay(2); }
1991/0803		return 0; } /*
1992/0902		* ask 8042 to reset the machine */
1991/1210		void
1992/0902		i8042reset(void) {
1997/1101		ushort *s = KADDR(0x472);
1994/0923		int i, x;
1994/0826		*s = 0x1234; /* BIOS warm-boot flag */
1992/1013		/*
1997/0327		* newer reset the machine command
1992/1013		*/
1992/0902		outready();
1997/0327		outb(Cmd, 0xFE);
1992/1013		outready();
1994/0923
1992/1013		/*
1994/0923		* Pulse it by hand (old somewhat reliable)
1992/1013		*/
1994/0923		x = 0xDF; for(i = 0; i < 5; i++){ x ^= 1; outready(); outb(Cmd, 0xD1); outready(); outb(Data, x); /* toggle reset */ delay(100); }
1992/0902		}
1997/0327		int i8042auxcmd(int cmd)
1992/0904		{
1997/0327		unsigned int c; int tries;
1992/0811
1997/0327		c = 0; tries = 0;
1992/1020
1997/0327		ilock(&i8042lock); do{ if(tries++ > 2) break; if(outready() < 0) break; outb(Cmd, 0xD4); if(outready() < 0) break; outb(Data, cmd); if(outready() < 0) break; if(inready() < 0) break; c = inb(Data); } while(c == 0xFE || c == 0); iunlock(&i8042lock);
1992/0408
1997/0327		if(c != 0xFA){ print("i8042: %2.2ux returned to the %2.2ux command\n", c, cmd); return -1;
1993/1124		} return 0; }
1992/0904		/*
1993/1124		* keyboard interrupt
1992/0904		*/
1992/1017		static void
1997/0327		i8042intr(Ureg*, void*)
1992/0904		{
1994/0503		int s, c, i;
1991/0703		static int esc1, esc2;
1997/0327		static int alt, caps, ctl, num, shift;
1994/0503		static int collecting, nk;
1999/1005		static Rune kc[5];
1991/0703		int keyup;
1991/0702
1991/0703		/*
1991/0731		* get status
1991/0703		*/
1997/0327		lock(&i8042lock);
1991/0730		s = inb(Status);
1997/0327		if(!(s&Inready)){ unlock(&i8042lock);
1993/1124		return;
1997/0327		}
1991/0731		/* * get the character */
1991/0703		c = inb(Data);
1997/0327		unlock(&i8042lock);
1991/0730		/*
1997/0327		* if it's the aux port...
1991/0730		*/ if(s & Minready){
1997/0327		if(auxputc != nil) auxputc(c, shift);
1993/1124		return;
1991/0730		}
1991/0703		/* * e0's is the first of a 2 character sequence */ if(c == 0xe0){ esc1 = 1;
1993/1124		return;
1991/0703		} else if(c == 0xe1){ esc2 = 2;
1993/1124		return;
1991/0703		}
1991/0822		keyup = c&0x80; c &= 0x7f; if(c > sizeof kbtab){
1998/0207		c |= keyup; if(c != 0xFF) /* these come fairly often: CAPSLOCK U Y */ print("unknown key %ux\n", c);
1993/1124		return;
1991/0822		}
1991/0703		if(esc1){ c = kbtabesc1[c]; esc1 = 0; } else if(esc2){ esc2--;
1993/1124		return;
1991/0703		} else if(shift) c = kbtabshift[c]; else c = kbtab[c]; if(caps && c<='z' && c>='a') c += 'A' - 'a'; /* * keyup only important for shifts */ if(keyup){ switch(c){
1995/0330		case Latin: alt = 0; break;
1991/0703		case Shift:
1997/0327		shift = 0;
1991/0703		break; case Ctrl: ctl = 0; break; }
1993/1124		return;
1991/0703		} /* * normal character */
1999/1005		if(!(c & (Spec|KF))){
1995/0330		if(ctl){ if(alt && c == Del) exit(0);
1991/0703		c &= 0x1f;
1995/0330		}
1994/0503		if(!collecting){
1993/1113		kbdputc(kbdq, c);
1994/0503		return;
1991/0703		}
1994/0503		kc[nk++] = c; c = latin1(kc, nk); if(c < -1) /* need more keystrokes */ return; if(c != -1) /* valid sequence */ kbdputc(kbdq, c); else /* dump characters */ for(i=0; i<nk; i++) kbdputc(kbdq, kc[i]); nk = 0; collecting = 0;
1993/1124		return;
1991/0703		} else { switch(c){ case Caps: caps ^= 1;
1993/1124		return;
1991/0703		case Num: num ^= 1;
1993/1124		return;
1991/0703		case Shift:
1997/0327		shift = 1;
1993/1124		return;
1991/0703		case Latin:
1995/0330		alt = 1;
2002/0417		/* * VMware uses Ctl-Alt as the key combination * to make the VM give up keyboard and mouse focus. * This has the unfortunate side effect that when you * come back into focus, Plan 9 thinks you want to type * a compose sequence (you just typed alt). * * As a clusmy hack around this, we look for ctl-alt * and don't treat it as the start of a compose sequence. */ if(!ctl){ collecting = 1; nk = 0; }
1993/1124		return;
1991/0703		case Ctrl:
2002/0417		collecting = 0; nk = 0;
1991/0703		ctl = 1;
1993/1124		return;
1991/0703		} }
1993/1113		kbdputc(kbdq, c);
1992/0222		}
1997/0327		void i8042auxenable(void (*putc)(int, int))
1993/1124		{
1997/0327		char *err = "i8042: aux init failed\n";
1993/1124
1997/0327		/* enable kbd/aux xfers and interrupts */ ccc &= ~Cauxdis; ccc |= Cauxint;
1993/1124
1997/0327		ilock(&i8042lock);
1993/1124		if(outready() < 0)
1997/0327		print(err); outb(Cmd, 0x60); /* write control register */
1993/1124		if(outready() < 0)
1997/0327		print(err);
1993/1124		outb(Data, ccc); if(outready() < 0)
1997/0327		print(err); outb(Cmd, 0xA8); /* auxilliary device enable */
1994/0317		if(outready() < 0){
1997/0327		iunlock(&i8042lock);
1994/0317		return; }
1997/0327		auxputc = putc;
1999/0819		intrenable(IrqAUX, i8042intr, 0, BUSUNKNOWN, "kbdaux");
1997/0327		iunlock(&i8042lock);
1993/1124		}
1992/0222		void
1993/1124		kbdinit(void)
1993/0915		{
1993/1124		int c;
1993/0915
1993/1124		/* wait for a quiescent controller */ while((c = inb(Status)) & (Outbusy | Inready)) if(c & Inready) inb(Data); /* get current controller command byte */ outb(Cmd, 0x20); if(inready() < 0){ print("kbdinit: can't read ccc\n"); ccc = 0; } else ccc = inb(Data); /* enable kbd xfers and interrupts */
1994/0322		/* disable mouse */
1993/1124		ccc &= ~Ckbddis;
1997/0327		ccc |= Csf | Ckbdint | Cscs1;
1993/1124		if(outready() < 0) print("kbd init failed\n"); outb(Cmd, 0x60); if(outready() < 0) print("kbd init failed\n"); outb(Data, ccc); outready();
2002/0411		} void kbdenable(void) { kbdq = qopen(4*1024, 0, 0, 0); if(kbdq == nil) panic("kbdinit"); qnoblock(kbdq, 1); ioalloc(Data, 1, 0, "kbd"); ioalloc(Cmd, 1, 0, "kbd"); intrenable(IrqKBD, i8042intr, 0, BUSUNKNOWN, "kbd");
1991/0703		}