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Ryan's IMPS/2 mouse fix

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%4060
This commit is contained in:
Sam Lantinga 2001-06-11 15:48:32 +00:00
parent 254c4d997c
commit 24b54aa981
1 changed files with 59 additions and 15 deletions
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74
src/video/fbcon/SDL_fbevents.c
View file

@ -397,21 +397,64 @@ static int gpm_available(void)
return available;
}
/* rcg06112001 Set up IMPS/2 mode, if possible. This gives
* us access to the mousewheel, etc. Returns zero if
* writes to device failed, but you still need to query the
* device to see which mode it's actually in.
*/
static int set_imps2_mode(int fd)
{
/* If you wanted to control the mouse mode (and we do :) ) ...
Set IMPS/2 protocol:
{0xf3,200,0xf3,100,0xf3,80}
Reset mouse device:
{0xFF}
*/
Uint8 set_imps2[] = {0xf3, 200, 0xf3, 100, 0xf3, 80};
Uint8 reset = 0xff;
fd_set fdset;
struct timeval tv;
int retval = 0;
if ( write(fd, &set_imps2, sizeof(set_imps2)) == sizeof(set_imps2) ) {
if (write(fd, &reset, sizeof (reset)) == sizeof (reset) ) {
retval = 1;
}
}
/* Get rid of any chatter from the above */
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
tv.tv_sec = 0;
tv.tv_usec = 0;
while ( select(fd+1, &fdset, 0, 0, &tv) > 0 ) {
char temp[32];
read(fd, temp, sizeof(temp));
}
return retval;
}
/* Returns true if the mouse uses the IMPS/2 protocol */
static int detect_imps2(int fd)
{
int imps2;
imps2 = 0;
/* rcg06112001 Attempt to set IMPS/2 mode first, even with envr var... */
set_imps2_mode(fd);
if ( getenv("SDL_MOUSEDEV_IMPS2") ) {
imps2 = 1;
}
if ( ! imps2 ) {
unsigned char query_ps2 = 0xF2;
Uint8 query_ps2 = 0xF2;
fd_set fdset;
struct timeval tv;
/* Get rid of any mouse motion noise */
FD_ZERO(&fdset);
FD_SET(fd, &fdset);
@ -422,16 +465,10 @@ static int detect_imps2(int fd)
read(fd, temp, sizeof(temp));
}
/* Query for the type of mouse protocol */
if ( write(fd, &query_ps2, 1) == 1 ) {
unsigned char ch = 0;
/* Query for the type of mouse protocol */
if ( write(fd, &query_ps2, sizeof (query_ps2)) == sizeof (query_ps2)) {
Uint8 ch = 0;
/* If you wanted to control the mouse mode:
Set IMPS/2 protocol:
{0xf3,200,0xf3,100,0xf3,80}
Reset mouse device:
{0xFF}
*/
/* Get the mouse protocol response */
do {
FD_ZERO(&fdset);
@ -441,7 +478,7 @@ static int detect_imps2(int fd)
if ( select(fd+1, &fdset, 0, 0, &tv) < 1 ) {
break;
}
} while ( (read(fd, &ch, 1) == 1) &&
} while ( (read(fd, &ch, sizeof (ch)) == sizeof (ch)) &&
((ch == 0xFA) || (ch == 0xAA)) );
/* Experimental values (Logitech wheelmouse) */
@ -502,9 +539,16 @@ fprintf(stderr, "Using GPM mouse\n");
}
/* Now try to use the new HID unified mouse device */
if ( mouse_fd < 0 ) {
mouse_fd = open("/dev/input/mice", O_RDONLY, 0);
if ( mouse_fd >= 0 ) {
mouse_drv = MOUSE_IMPS2;
mouse_fd = open("/dev/input/mice", O_RDWR, 0);
if (mouse_fd < 0) {
mouse_fd = open("/dev/input/mice", O_RDONLY, 0);
}
if (mouse_fd >= 0) {
if (detect_imps2(mouse_fd)) {
mouse_drv = MOUSE_IMPS2;
} else {
mouse_drv = MOUSE_PS2;
}
}
}
/* Now try to use a modern PS/2 port mouse */