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/* mousemode.c
*
* A program for linux-pmac by jonh Tue Feb 18 00:46:10 EST 1997
* hacked mercilessly by warner@lothar.com: don't blame jonh for my bugs!
*
* which feeds the right things to /dev/adb to reconfigure
* Apple Desktop Bus mice. It sets a mouse's ADB register 3 to the
* command line argument, which tells the mouse to invoke a different
* handler. Handler 4 on my Logitech mouse says to return extended data.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/adb.h>
#include <linux/cuda.h>
int fd; /* put this here where everybody can see it. Hey, it's not so */
/* much a global as it is an "object variable," where this */
/* program is the object. Yeah, that's it! Ahem. */
void
send(unsigned char *y, int len)
{
int n;
#if 0
printf("send: ");
for (n=0; n < len; n++)
printf("0x%02x ",y[n]);
printf("\n");
#endif
n = write(fd, y, (size_t) len);
if (n < len) {
perror("writing /dev/adb");
close(fd);
exit (EXIT_FAILURE);
}
}
void
listen(unsigned char *y)
{
int n;
n = read(fd, y, 80);
#if 0
printf("%d: ",n);
if (n > 0) {
int i;
for (i=0; i < n; i++)
printf("0x%02x ",y[i]);
}
printf("\n");
#endif
if (n < 0) {
perror("reading /dev/adb");
close(fd);
exit(EXIT_FAILURE);
}
}
void
setmouse(int addr, int mode)
{
unsigned char y[15];
/* curious parties should read Inside Mac/Devices/ADB Manager, */
/* looking at page 5-11. Inside Mac is available as pdf files */
/* from Apple's site. */
/* CUDA device 0? (the clock seems to be at 1) */
y[0] = ADB_PACKET;
/* mouse (0x30) listen (0x08) reg 3 (0x03) */
y[1] = ADB_WRITEREG(addr, 3);
/* service request enable (0x20), device addr 3 (0x03) */
//y[2]=(char) 0x023;
y[2] = 0x20 + addr;
/* device handler ID == mode */
y[3]= mode;
send(y, 4);
listen(y);
}
int
showmouse(int addr)
{
unsigned char y[15];
y[0] = ADB_PACKET;
y[1] = ADB_READREG(addr, 3);
send(y, 2);
listen(y);
/* make sure reply is from: */
if (y[0] == ADB_READREG(addr, 3)) {
return (y[2]);
} else {
return -1;
}
}
int
main(int argc, char **argv)
{
int addr, mode;
// argc==2: 'mousemode <addr>'
// argc==3: 'mousemode <addr> <handler>'
if (argc < 2 || argc > 3) {
printf("usage: mousemode <addr> [<handler>]\n");
printf(" Configures mouse at ADB address <addr> to use <handler>\n");
printf(" without <handler>, print value of current handler\n");
exit(EXIT_FAILURE);
}
fd = open("/dev/adb", O_RDWR);
if (fd <= 0) {
perror("opening /dev/adb");
exit(EXIT_FAILURE);
}
addr = atoi(argv[1]);
if (argc == 3) {
mode = atoi(argv[2]);
printf("handler for addr %d was %d\n", addr, showmouse(addr));
printf("trying to set handler to %d...\n", mode);
setmouse(addr, mode);
printf("handler is now %d\n", showmouse(addr));
} else {
printf("handler for addr %d is %d\n", addr, showmouse(addr));
}
close(fd);
return 0;
}
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