ref: 887ae1a17b54babf6a0946872bf6faaac1427be1
dir: /sys/src/cmd/aux/mouse.c/
#include <u.h>
#include <libc.h>
enum
{
Sleep500 = 500,
Sleep1000 = 1000,
Sleep2000 = 2000,
TIMEOUT = 5000, /* timeout for writes */
};
char *speeds[] =
{
"b1200",
"b2400",
"b4800",
"b9600",
0,
};
int button2;
#define DEBUG if(debug)
int can9600; /* true if type W mouse can be set to 9600 */
int debug;
int dontset; /* true if we shouldn't try to set the mouse type */
static void
usage(void)
{
fprint(2, "%s: usage: %s [device]\n", argv0, argv0);
exits("usage");
}
static void
catch(void *a, char *msg)
{
USED(a, msg);
if(strstr(msg, "alarm"))
noted(NCONT);
noted(NDFLT);
}
static void
dumpbuf(char *buf, int nbytes, char *s)
{
print(s);
while(nbytes-- > 0)
print("#%ux ", *buf++ & 0xFF);
print("\n");
}
static long
timedwrite(int fd, void *p, int n)
{
long rv;
alarm(TIMEOUT);
rv = write(fd, p, n);
alarm(0);
if(rv < 0){
fprint(2, "%s: timed out\n", argv0);
exits("timeout");
}
return rv;
}
static int
readbyte(int fd)
{
uchar c;
char buf[ERRMAX];
alarm(200);
if(read(fd, &c, sizeof(c)) == -1){
alarm(0);
errstr(buf, sizeof buf);
if(strcmp(buf, "interrupted") == 0)
return -1;
fprint(2, "%s: readbyte failed - %s\n", argv0, buf);
exits("read");
}
alarm(0);
return c;
}
static int
slowread(int fd, char *buf, int nbytes, char *msg)
{
char *p;
int c;
for(p = buf; nbytes > 1 && (c = readbyte(fd)) != -1; *p++ = c, nbytes--)
;
*p = 0;
DEBUG dumpbuf(buf, p-buf, msg);
return p-buf;
}
static void
toggleRTS(int fd)
{
/*
*
* reset the mouse (toggle RTS)
* must be >100mS
*/
timedwrite(fd, "d1", 2);
timedwrite(fd, "r1", 2);
sleep(Sleep500);
timedwrite(fd, "d0", 2);
timedwrite(fd, "r0", 2);
sleep(Sleep500);
timedwrite(fd, "d1", 2);
timedwrite(fd, "r1", 2);
sleep(Sleep500);
}
static void
setupeia(int fd, char *baud, char *bits)
{
alarm(TIMEOUT);
/*
* set the speed to 1200/2400/4800/9600 baud,
* 7/8-bit data, one stop bit and no parity
*/
DEBUG print("setupeia(%s,%s)\n", baud, bits);
timedwrite(fd, baud, strlen(baud));
timedwrite(fd, bits, strlen(bits));
timedwrite(fd, "s1", 2);
timedwrite(fd, "pn", 2);
timedwrite(fd, "i1", 2);
alarm(0);
}
/*
* check for a types M, M3, & W
*
* we talk to all these mice using 1200 baud
*/
int
MorW(int ctl, int data)
{
char buf[256];
int c;
/*
* set up for type M, V or W
* flush any pending data
*/
setupeia(ctl, "b1200", "l7");
toggleRTS(ctl);
while(slowread(data, buf, sizeof(buf), "flush: ") > 0)
;
toggleRTS(ctl);
/*
* see if there's any data from the mouse
* (type M, V and W mice)
*/
c = slowread(data, buf, sizeof(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, "*?".
*
* the second check is a kludge for some type W mice on next's
* that send a garbage character back before the "M3".
*/
if((c > 0 && buf[0] == 'M') || (c > 1 && buf[1] == 'M')){
timedwrite(data, "*?", 2);
c = slowread(data, buf, sizeof(buf), "check W: ");
/*
* 4 bytes back
* indicates a type W mouse
*/
if(c == 4){
if(buf[1] & (1<<4))
can9600 = 1;
setupeia(ctl, "b1200", "l8");
timedwrite(data, "*U", 2);
slowread(data, buf, sizeof(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.
*/
int
C(int ctl, int data)
{
char **s;
int c;
char buf[256];
sleep(100);
for(s = speeds; *s; s++){
DEBUG print("%s\n", *s);
setupeia(ctl, *s, "l8");
timedwrite(data, "s", 1);
c = slowread(data, buf, sizeof(buf), "check C: ");
if(c >= 1 && (*buf & 0xBF) == 0x0F){
sleep(100);
timedwrite(data, "*n", 2);
sleep(100);
setupeia(ctl, "b1200", "l8");
timedwrite(data, "s", 1);
c = slowread(data, buf, sizeof(buf), "recheck C: ");
if(c >= 1 && (*buf & 0xBF) == 0x0F){
timedwrite(data, "U", 1);
return 'C';
}
}
sleep(100);
}
return 0;
}
char *bauderr = "mouse: can't set baud rate, mouse at 1200\n";
void
Cbaud(int ctl, int data, int baud)
{
char buf[32];
switch(baud){
case 0:
case 1200:
return;
case 2400:
buf[1] = 'o';
break;
case 4800:
buf[1] = 'p';
break;
case 9600:
buf[1] = 'q';
break;
default:
fprint(2, bauderr);
return;
}
buf[0] = '*';
buf[2] = 0;
sleep(100);
timedwrite(data, buf, 2);
sleep(100);
timedwrite(data, buf, 2);
sprint(buf, "b%d", baud);
setupeia(ctl, buf, "l8");
}
void
Wbaud(int ctl, int data, int baud)
{
char buf[32];
switch(baud){
case 0:
case 1200:
return;
case 9600:
if(can9600)
break;
/* fall through */
default:
fprint(2, bauderr);
return;
}
timedwrite(data, "*q", 2);
setupeia(ctl, "b9600", "l8");
slowread(data, buf, sizeof(buf), "setbaud: ");
}
void
main(int argc, char *argv[])
{
char *p;
int baud;
int tries, conf, ctl, data, def, type;
char buf[256];
def = 0;
baud = 0;
ARGBEGIN{
case 'b':
baud = atoi(ARGF());
break;
case 'd':
p = ARGF();
def = *p;
break;
case 'n':
dontset = 1;
break;
case 'D':
debug = 1;
break;
default:
usage();
}ARGEND
p = "0";
if(argc)
p = *argv;
if((conf = open("/dev/mousectl", OWRITE)) == -1){
fprint(2, "%s: can't open /dev/mousectl - %r\n", argv0);
if(dontset == 0)
exits("open /dev/mousectl");
}
if(strncmp(p, "ps2", 3) == 0){
if(write(conf, p, strlen(p)) < 0){
fprint(2, "%s: error setting mouse type - %r\n", argv0);
exits("write conf");
}
exits(0);
}
type = 0;
for(tries = 0; type == 0 && tries < 6; tries++){
if(tries)
fprint(2, "%s: Unknown mouse type, retrying...\n", argv0);
sprint(buf, "#t/eia%sctl", p);
if((ctl = open(buf, ORDWR)) == -1){
fprint(2, "%s: can't open %s - %r\n", argv0, buf);
exits("open ctl");
}
sprint(buf, "#t/eia%s", p);
if((data = open(buf, ORDWR)) == -1){
fprint(2, "%s: can't open %s - %r\n", argv0, buf);
exits("open data");
}
notify(catch);
type = MorW(ctl, data);
if(type == 0)
type = C(ctl, data);
if(type == 0){
/* with the default we can't assume anything */
baud = 0;
/* try the default */
switch(def){
case 'C':
setupeia(ctl, "b1200", "l8");
break;
case 'M':
setupeia(ctl, "b1200", "l7");
break;
}
type = def;
}
sprint(buf, "serial %s", p);
switch(type){
case 0:
close(data);
close(ctl);
continue;
case 'C':
DEBUG print("Logitech 5 byte mouse\n");
Cbaud(ctl, data, baud);
break;
case 'W':
DEBUG print("Type W mouse\n");
Wbaud(ctl, data, baud);
break;
case 'M':
DEBUG print("Microsoft compatible mouse\n");
strcat(buf, " M");
break;
}
}
if(type == 0){
fprint(2, "%s: Unknown mouse type, giving up\n", argv0);
exits("no mouse");
}
DEBUG fprint(2, "mouse configured as '%s'\n", buf);
if(dontset == 0 && write(conf, buf, strlen(buf)) < 0){
fprint(2, "%s: error setting mouse type - %r\n", argv0);
exits("write conf");
}
exits(0);
}