ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /os/js/kbd.c/
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"
#include "../port/error.h"
enum
{
Data= 0x60, /* data port */
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 */
Parity= 0x80,
Cmd= 0x64, /* command port (write only) */
CTdata= 0x0, /* chips & Technologies ps2 data port */
CTstatus= 0x1, /* chips & Technologies ps2 status port */
Enable= 1<<7,
Clear= 1<<6,
Error= 1<<5,
Intenable= 1<<4,
Reset= 1<<3,
Tready= 1<<2,
Rready= 1<<1,
Idle= 1<<0,
Spec= 0x80,
PF= Spec|0x20, /* num pad function key */
View= Spec|0x00, /* view (shift window up) */
KF= Spec|0x40, /* function key */
Shift= Spec|0x60,
Break= Spec|0x61,
Ctrl= Spec|0x62,
Latin= Spec|0x63,
Caps= Spec|0x64,
Num= Spec|0x65,
Middle= Spec|0x66,
No= 0x00, /* peter */
Home= KF|13,
Up= KF|14,
Pgup= KF|15,
Print= KF|16,
Left= View,
Right= View,
End= '\r',
Down= View,
Pgdown= View,
Ins= KF|20,
Del= 0x7F,
Rbutton=4,
Mbutton=2,
Lbutton=1,
};
uchar
kbtab[] = {
[0x00] No, 0x1b, '1', '2', '3', '4', '5', '6',
[0x08] '7', '8', '9', '0', '-', '=', '\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',
[0x30] 'b', 'n', 'm', ',', '.', '/', Shift, '*',
[0x38] Latin, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, KF|12, '7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', No, No, No, KF|11,
[0x58] KF|12, No, No, No, No, No, No, No,
};
uchar
kbtabshift[] = {
[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',
[0x30] 'B', 'N', 'M', '<', '>', '?', Shift, '*',
[0x38] Latin, ' ', Ctrl, KF|1, KF|2, KF|3, KF|4, KF|5,
[0x40] KF|6, KF|7, KF|8, KF|9, KF|10, Num, KF|12, '7',
[0x48] '8', '9', '-', '4', '5', '6', '+', '1',
[0x50] '2', '3', '0', '.', No, No, No, KF|11,
[0x58] KF|12, No, No, No, No, No, No, No,
};
uchar
kbtabesc1[] = {
[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,
[0x18] No, No, No, No, '\n', Ctrl, No, No,
[0x20] No, No, No, No, No, No, No, No,
[0x28] No, No, Shift, No, No, No, No, No,
[0x30] No, No, No, No, No, '/', No, Print,
[0x38] Latin, No, No, No, No, No, No, No,
[0x40] No, No, No, No, No, No, Break, Home,
[0x48] Up, Pgup, No, Left, No, Right, No, End,
[0x50] Down, Pgdown, Ins, Del, No, No, No, No,
[0x58] No, No, No, No, No, No, No, No,
};
static int keybuttons;
static uchar ccc;
static int shift;
enum
{
/* controller command byte */
Cscs1= (1<<6), /* scan code set 1 */
Cmousedis= (1<<5), /* mouse disable */
Ckbddis= (1<<4), /* kbd disable */
Csf= (1<<2), /* system flag */
Cmouseint= (1<<1), /* mouse interrupt enable */
Ckbdint= (1<<0), /* kbd interrupt enable */
};
/*
* wait for output no longer busy
*/
static int
outready(void)
{
int tries;
for(tries = 0; (superio_readctl() & Outbusy); tries++){
if(tries > 500)
return -1;
microdelay(2);
}
return 0;
}
/*
* wait for input
*/
static int
inready(void)
{
int tries;
for(tries = 0; !(superio_readctl() & Inready); tries++){
if(tries > 500)
return -1;
microdelay(2);
}
return 0;
}
/*
* send a command to the mouse
*/
static int
mousecmd(int cmd)
{
unsigned int c;
int tries;
c = 0;
tries = 0;
do{
if(tries++ > 2)
break;
if(outready() < 0)
break;
superio_writectl(0xD4);
if(outready() < 0)
break;
superio_writedata(cmd);
if(outready() < 0)
break;
if(inready() < 0)
break;
c = superio_readdata();
} while(c == 0xFE || c == 0);
if(c != 0xFA){
print("mouse returns %2.2ux to the %2.2ux command\n", c, cmd);
return -1;
}
return 0;
}
/*
* ask 8042 to enable the use of address bit 20
*/
void
i8042a20(void)
{
outready();
superio_writectl(0xD1);
outready();
superio_writedata(0xDF);
outready();
}
/*
* ask 8042 to reset the machine
*/
void
i8042reset(void)
{
ushort *s = (ushort*)(KZERO|0x472);
int i, x;
*s = 0x1234; /* BIOS warm-boot flag */
/*
* newer reset the machine command
*/
outready();
superio_writectl(0xFE);
outready();
/*
* Pulse it by hand (old somewhat reliable)
*/
x = 0xDF;
for(i = 0; i < 5; i++){
x ^= 1;
outready();
superio_writectl(0xD1);
outready();
superio_writedata(x); /* toggle reset */
microdelay(100);
}
}
/*
* ps/2 mouse message is three bytes
*
* byte 0 - 0 0 SDY SDX 1 M R L
* byte 1 - DX
* byte 2 - DY
*
* shift & left button is the same as middle button
*/
static int
ps2mouseputc(int c)
{
static short msg[3];
static int nb;
static uchar b[] = {0, 1, 4, 5, 2, 3, 6, 7, 0, 1, 2, 5, 2, 3, 6, 7 };
int buttons, dx, dy;
/*
* check byte 0 for consistency
*/
if(nb==0 && (c&0xc8)!=0x08)
return 0;
msg[nb] = c;
if(++nb == 3) {
nb = 0;
if(msg[0] & 0x10)
msg[1] |= 0xFF00;
if(msg[0] & 0x20)
msg[2] |= 0xFF00;
buttons = b[(msg[0]&7) | (shift ? 8 : 0)] | keybuttons;
dx = msg[1];
dy = -msg[2];
mousetrack(buttons, dx, dy, 1);
}
return 0;
}
/*
* keyboard interrupt
*/
void
kbdintr(void)
{
int s, c, i;
static int esc1, esc2;
static int caps;
static int ctl;
static int num;
static int collecting, nk;
static int alt;
static Rune kc[5];
int keyup;
/*
* get status
*/
s = superio_readctl();
if(!(s&Inready))
return;
/*
* get the character
*/
c = superio_readdata();
/*
* if it's the mouse...
*/
if(s & Minready) {
ps2mouseputc(c);
return;
}
/*
* e0's is the first of a 2 character sequence
*/
if(c == 0xe0){
esc1 = 1;
return;
} else if(c == 0xe1){
esc2 = 2;
return;
}
keyup = c&0x80;
c &= 0x7f;
if(c > sizeof kbtab){
/* print("unknown key %ux\n", c|keyup); */
return;
}
if(esc1){
c = kbtabesc1[c];
esc1 = 0;
} else if(esc2){
esc2--;
return;
} 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){
case Latin:
alt = 0;
break;
case Shift:
shift = 0;
break;
case Ctrl:
ctl = 0;
break;
}
return;
}
/*
* normal character
*/
if(!(c & Spec)){
if(ctl){
if(alt && c == Del)
exit(0);
c &= 0x1f;
}
if(!collecting){
kbdputc(kbdq, c);
return;
}
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;
return;
} else {
switch(c){
case Caps:
caps ^= 1;
return;
case Num:
num ^= 1;
return;
case Shift:
shift = 1;
return;
case Latin:
alt = 1;
collecting = 1;
nk = 0;
return;
case Ctrl:
ctl = 1;
return;
}
}
kbdputc(kbdq, c);
}
/*
* set up a ps2 mouse
*/
static void
ps2mouse(void)
{
int x;
/* enable kbd/mouse xfers and interrupts */
x = splhi();
ccc &= ~Cmousedis;
ccc |= Cmouseint;
if(outready() < 0)
print("mouse init failed\n");
superio_writectl(0x60);
if(outready() < 0)
print("mouse init failed\n");
superio_writedata(ccc);
if(outready() < 0)
print("mouse init failed\n");
superio_writectl(0xA8);
if(outready() < 0){
splx(x);
return;
}
/* make mouse streaming, enabled */
mousecmd(0xEA);
mousecmd(0xF4);
splx(x);
}
void
kbdinit(void)
{
int c;
kbdq = qopen(4*1024, 0, 0, 0);
qnoblock(kbdq, 1);
/* wait for a quiescent controller */
while((c = superio_readctl()) & (Outbusy | Inready))
if(c & Inready)
superio_readdata();
/* get current controller command byte */
superio_writectl(0x20);
if(inready() < 0){
print("kbdinit: can't read ccc\n");
ccc = 0;
} else
ccc = superio_readdata();
/* enable kbd xfers and interrupts */
/* disable mouse */
ccc &= ~Ckbddis;
ccc |= Csf | Ckbdint | Cscs1 | Cmousedis;
if(outready() < 0)
print("kbd init failed\n");
superio_writectl(0x60);
if(outready() < 0)
print("kbd init failed\n");
superio_writedata(ccc);
outready();
/* Assume ps2 mouse */
ps2mouse();
}