100 lines
2.6 KiB
C
100 lines
2.6 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/*
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* Count bytes within runes, if it fits in a uint64_t, and other things.
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*/
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#include <u.h>
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#include <lib9.h>
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static int packetsize = 3;
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void
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main(int argc, char *argv[])
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{
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int intellimouse = 0;
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int shift = 0;
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int ps2fd;
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int mousefd;
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char c;
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static short msg[4];
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static int nb;
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static uint8_t b[] = {0, 1, 4, 5, 2, 3, 6, 7, 0, 1, 2, 3, 2, 3, 6, 7 };
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int buttons, dx, dy;
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ps2fd = open("#P/ps2mouse", OREAD);
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if (ps2fd < 0) {
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print("#P/ps2mouse: %r");
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exits("can't open #P/ps2mouse");
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}
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mousefd = open("/dev/mousein", OWRITE);
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if (mousefd < 0) {
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print("/dev/mousein: %r");
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exits("can't open /dev/mouse");
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}
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while (read(ps2fd, &c, 1) > 0) {
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/*
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* non-ps2 keyboards might not set shift
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* but still set mouseshifted.
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*/
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//shift |= mouseshifted;
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/*
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* check byte 0 for consistency
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*/
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if(nb==0 && (c&0xc8)!=0x08)
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if(intellimouse && (c==0x00 || c==0x01 || c==0xFF)){
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/* last byte of 4-byte packet */
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packetsize = 4;
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continue;
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}
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msg[nb] = c;
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if(++nb == packetsize){
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nb = 0;
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if(msg[0] & 0x10)
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msg[1] |= 0xFF00;
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if(msg[0] & 0x20)
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msg[2] |= 0xFF00;
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buttons = b[(msg[0]&7) | (shift ? 8 : 0)];
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if(intellimouse && packetsize==4){
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if((msg[3]&0xc8) == 0x08){
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/* first byte of 3-byte packet */
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packetsize = 3;
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msg[0] = msg[3];
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nb = 1;
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/* fall through to emit previous packet */
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}else{
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/* The AccuPoint on the Toshiba 34[48]0CT
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* encodes extra buttons as 4 and 5. They repeat
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* and don't release, however, so user-level
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* timing code is required. Furthermore,
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* intellimice with 3buttons + scroll give a
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* two's complement number in the lower 4 bits
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* (bit 4 is sign extension) that describes
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* the amount the scroll wheel has moved during
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* the last sample. Here we use only the sign to
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* decide whether the wheel is moving up or down
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* and generate a single button 4 or 5 click
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* accordingly.
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*/
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if((msg[3] >> 3) & 1)
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buttons |= 1<<3;
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else if(msg[3] & 0x7)
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buttons |= 1<<4;
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}
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}
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dx = msg[1];
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dy = -msg[2];
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//mousetrack(dx, dy, buttons, TK2MS(MACHP(0)->ticks));
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fprint(mousefd,"m %#x %#x %#x\n", dx, dy, buttons);
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}
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}
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exits(nil);
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}
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