ref: d916a4c3823f55227ffae35738c2497256e307b5
dir: /appl/cmd/mouse.b/
implement mouse;
# ported from plan 9's aux/mouse
include "sys.m";
sys: Sys;
sprint, fprint, sleep: import sys;
include "draw.m";
stderr: ref Sys->FD;
mouse: module {
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
Sleep500: con 500;
Sleep1000: con 1000;
Sleep2000: con 2000;
TIMEOUT: con 5000;
fail := "fail:";
usage()
{
fprint(stderr, "usage: mouse [type]\n");
raise fail+"usage";
}
write(fd: ref Sys->FD, buf: array of byte, n: int): int
{
if (debug) {
sys->fprint(stderr, "write(%d) ", fd.fd);
for (i := 0; i < len buf; i++) {
sys->fprint(stderr, "'%c' ", int buf[i]);
}
sys->fprint(stderr, "\n");
}
return sys->write(fd, buf, n);
}
speeds := array[] of {"b1200", "b2400", "b4800", "b9600"};
debug := 0;
can9600 := 0;
init(nil: ref Draw->Context, argv: list of string)
{
sys = load Sys Sys->PATH;
stderr = sys->fildes(2);
{
if (argv == nil)
usage();
argv = tl argv;
while (argv != nil && len (arg := hd argv) > 1 && arg[0] == '-') {
case arg[1] {
'D' =>
debug = 1;
* =>
usage();
}
argv = tl argv;
}
if (len argv > 1)
usage();
p: string;
if (argv == nil)
p = mouseprobe();
else
p = hd argv;
if (p != nil && !isnum(p)) {
mouseconfig(p);
return;
}
if (p == nil) {
serial("0");
serial("1");
fprint(stderr, "mouse: no mouse detected\n");
} else {
err := serial(p);
fprint(stderr, "mouse: %s\n", err);
}
}
exception{
# this could be taken out so the shell could
# get an indication that the command has failed.
"fail:*" =>
;
}
}
# probe for a serial mouse on port p;
# return some an error string if not found.
serial(p: string): string
{
baud := 0;
f := sys->sprint("/dev/eia%sctl", p);
if ((ctl := sys->open(f, Sys->ORDWR)) == nil)
return sprint("can't open %s - %r\n", f);
f = sys->sprint("/dev/eia%s", p);
if ((data := sys->open(f, Sys->ORDWR)) == nil)
return sprint("can't open %s - %r\n", f);
if(debug) fprint(stderr, "ctl=%d, data=%d\n", ctl.fd, data.fd);
if(debug) fprint(stderr, "MorW()\n");
mtype := MorW(ctl, data);
if (mtype == 0) {
if(debug) return "no mouse detected";
if(debug) fprint(stderr, "C()\n");
mtype = C(ctl, data);
}
if (mtype == 0)
return "no mouse detected on port "+p;
if(debug)fprint(stderr, "done eia setup\n");
mt := "serial " + p;
case mtype {
* =>
return "unknown mouse type";
'C' =>
if(debug) fprint(stderr, "Logitech 5 byte mouse\n");
Cbaud(ctl, data, baud);
'W' =>
if(debug) fprint(stderr, "Type W mouse\n");
Wbaud(ctl, data, baud);
'M' =>
if(debug) fprint(stderr, "Microsoft compatible mouse\n");
mt += " M";
}
mouseconfig(mt);
return nil;
}
mouseconfig(mt: string)
{
if ((conf := sys->open("/dev/mousectl", Sys->OWRITE)) == nil) {
fprint(stderr, "mouse: can't open mousectl - %r\n");
raise fail+"open mousectl";
}
if(debug) fprint(stderr, "opened mousectl\n");
if (write(conf, array of byte mt, len array of byte mt) < 0) {
fprint(stderr, "mouse: error setting mouse type - %r\n");
raise fail+"write conf";
}
fprint(stderr, "mouse: configured as '%s'\n", mt);
}
isnum(s: string): int
{
for (i := 0; i < len s; i++)
if (s[i] < '0' || s[i] > '9')
return 0;
return 1;
}
mouseprobe(): string
{
if ((probe := sys->open("/dev/mouseprobe", Sys->OREAD)) == nil) {
fprint(stderr, "mouse: can't open mouseprobe - %r\n");
return nil;
}
buf := array[64] of byte;
n := sys->read(probe, buf, len buf);
if (n <= 0)
return nil;
if (buf[n - 1] == byte '\n')
n--;
if(debug) fprint(stderr, "mouse probe detected mouse of type '%s'\n", string buf[0:n]);
return string buf[0:n];
}
readbyte(fd: ref Sys->FD): int
{
buf := array[1] of byte;
(n, err) := timedread(fd, buf, 1, 200);
if (n < 0) {
if (err == nil)
return -1;
fprint(stderr, "mouse: readbyte failed - %s\n", err);
raise fail+"read failed";
}
return int buf[0];
}
slowread(fd: ref Sys->FD, buf: array of byte, nbytes: int, msg: string): int
{
for (i := 0; i < nbytes; i++) {
if ((c := readbyte(fd)) == -1)
break;
buf[i] = byte c;
}
if(debug) dumpbuf(buf[0:i], msg);
return i;
}
dumpbuf(buf: array of byte, msg: string)
{
sys->fprint(stderr, "%s", msg);
for (i := 0; i < len buf; i++)
sys->fprint(stderr, "#%ux ", int buf[i]);
sys->fprint(stderr, "\n");
}
toggleRTS(fd: ref Sys->FD)
{
# reset the mouse (toggle RTS)
# must be >100mS
writes(fd, "d0");
sleep(10);
writes(fd, "r0");
sleep(Sleep500);
writes(fd, "d1");
sleep(10);
writes(fd, "r1");
sleep(Sleep500);
}
setupeia(fd: ref Sys->FD, baud, bits: string)
{
# set the speed to 1200/2400/4800/9600 baud,
# 7/8-bit data, one stop bit and no parity
(abaud, abits) := (array of byte baud, array of byte bits);
if(debug)sys->fprint(stderr, "setupeia(%s,%s)\n", baud, bits);
write(fd, abaud, len abaud);
write(fd, abits, len abits);
writes(fd, "s1");
writes(fd, "pn");
}
# check for types M, M3 & W
#
# we talk to all these mice using 1200 baud
MorW(ctl, data: ref Sys->FD): int
{
# set up for type M, V or W
# flush any pending data
setupeia(ctl, "b1200", "l7");
toggleRTS(ctl);
if(debug)sys->fprint(stderr, "toggled RTS\n");
buf := array[256] of byte;
while (slowread(data, buf, len buf, "flush: ") > 0)
;
if(debug) sys->fprint(stderr, "done slowread\n");
toggleRTS(ctl);
# see if there's any data from the mouse
# (type M, V and W mice)
c := slowread(data, buf, len buf, "check M: ");
# type M, V and W mice return "M" or "M3" after reset.
# check for type W by sending a 'Send Standard Configuration'
# command, "*?".
if (c > 0 && int buf[0] == 'M') {
writes(data, "*?");
c = slowread(data, buf, len buf, "check W: ");
# 4 bytes back indicates a type W mouse
if (c == 4) {
if (int buf[1] & (1<<4))
can9600 = 1;
setupeia(ctl, "b1200", "l8");
writes(data, "*U");
slowread(data, buf, len buf, "check W: ");
return 'W';
}
return 'M';
}
return 0;
}
# check for type C by seeing if it responds to the status
# command "s". the mouse is at an unknown speed so we
# have to check all possible speeds.
C(ctl, data: ref Sys->FD): int
{
buf := array[256] of byte;
for (s := speeds; len s > 0; s = s[1:]) {
if (debug) sys->print("%s\n", s[0]);
setupeia(ctl, s[0], "l8");
writes(data, "s");
c := slowread(data, buf, len buf, "check C: ");
if (c >= 1 && (int buf[0] & 16rbf) == 16r0f) {
sleep(100);
writes(data, "*n");
sleep(100);
setupeia(ctl, "b1200", "l8");
writes(data, "s");
c = slowread(data, buf, len buf, "recheck C: ");
if (c >= 1 && (int buf[0] & 16rbf) == 16r0f) {
writes(data, "U");
return 'C';
}
}
sleep(100);
}
return 0;
}
Cbaud(ctl, data: ref Sys->FD, baud: int)
{
buf := array[2] of byte;
case baud {
0 or 1200 =>
return;
2400 =>
buf[1] = byte 'o';
4800 =>
buf[1] = byte 'p';
9600 =>
buf[1] = byte 'q';
* =>
fprint(stderr, "mouse: can't set baud rate, mouse at 1200\n");
return;
}
buf[0] = byte '*';
sleep(100);
write(data, buf, 2);
sleep(100);
write(data, buf, 2);
setupeia(ctl, sys->sprint("b%d", baud), "l8");
}
Wbaud(ctl, data: ref Sys->FD, baud: int)
{
case baud {
0 or 1200 =>
return;
* =>
if (baud == 9600 && can9600)
break;
fprint(stderr, "mouse: can't set baud rate, mouse at 1200\n");
return;
}
writes(data, "*q");
setupeia(ctl, "b9600", "l8");
slowread(data, array[32] of byte, 32, "setbaud: ");
}
readproc(fd: ref Sys->FD, buf: array of byte, n: int,
pidch: chan of int, ch: chan of (int, string))
{
s: string;
pidch <-= sys->pctl(0, nil);
n = sys->read(fd, buf, n);
if (n < 0)
s = sys->sprint("read: %r");
ch <-= (n, s);
}
sleepproc(t: int, pidch: chan of int, ch: chan of (int, string))
{
pidch <-= sys->pctl(0, nil);
sys->sleep(t);
ch <-= (-1, nil);
}
timedread(fd: ref Sys->FD, buf: array of byte, n: int, t: int): (int, string)
{
pidch := chan of int;
retch := chan of (int, string);
spawn readproc(fd, buf, n, pidch, retch);
wpid := <-pidch;
spawn sleepproc(t, pidch, retch);
spid := <-pidch;
(nr, err) := <-retch;
if (nr == -1 && err == nil)
kill(wpid);
else
kill(spid);
return (nr, err);
}
kill(pid: int)
{
if ((fd := sys->open("#p/"+string pid+"/ctl", Sys->OWRITE)) == nil) {
fprint(stderr, "couldn't kill %d: %r\n", pid);
return;
}
sys->write(fd, array of byte "kill", 4);
}
writes(fd: ref Sys->FD, s: string): int
{
a := array of byte s;
return write(fd, a, len a);
}