ref: b502a62da2ec6058923db94f87ecc2d29db2fa77
dir: /os/pc/mouse.c/
#include "u.h" #include "../port/lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "../port/error.h" #include "io.h" /* * mouse types */ enum { Mouseother= 0, Mouseserial= 1, MousePS2= 2, }; static int mousetype; /* * 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 void ps2mouseputc(int c, int shift) { 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; 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)]; dx = msg[1]; dy = -msg[2]; mousetrack(buttons, dx, dy, 1); } return; } /* * set up a ps2 mouse */ static void ps2mouse(void) { if(mousetype == MousePS2) return; i8042auxenable(ps2mouseputc); /* make mouse streaming, enabled */ i8042auxcmd(0xEA); i8042auxcmd(0xF4); mousetype = MousePS2; } void ps2mouselink(void) { /* * hack */ ps2mouse(); }