static void check_change(unsigned long dummy)
{
static int drive = 0;
unsigned long flags;
int stat;
if (fdc_busy)
return; /* Don't start poking about if the fdc is busy */
return; /* let's just forget it for the mo DAG */
if (++drive > 1 || !unit[drive].connected)
drive = 0;
save_flags(flags);
cli();
if (!stdma_islocked()) {
stat = !!(FDC1772_READ(FDC1772REG_STATUS) & FDC1772STAT_WPROT);
/* The idea here is that if the write protect line has changed then
the disc must have changed */
if (stat != unit[drive].wpstat) {
DPRINT(("wpstat[%d] = %d\n", drive, stat));
unit[drive].wpstat = stat;
set_bit(drive, &changed_floppies);
}
}
restore_flags(flags);
START_CHECK_CHANGE_TIMER(CHECK_CHANGE_DELAY);
}
static void fd_rwsec(void)
{
unsigned long paddr, flags;
unsigned int rwflag, old_motoron;
unsigned int track;
DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n", ReqSector, ReqCmd == WRITE ? 'w' : 'r'));
if (ReqCmd == WRITE) {
/*cache_push( (unsigned long)ReqData, 512 ); */
paddr = (unsigned long) ReqData;
rwflag = 0x100;
} else {
#ifdef TRACKBUFFER
if (read_track)
paddr = (unsigned long)PhysTrackBuffer;
else
paddr =(unsigned long)PhysDMABuffer;
#else
paddr = (unsigned long)PhysDMABuffer;
#endif
rwflag = 0;
}
DPRINT(("fd_rwsec() before sidesel rwflag=%d sec=%d trk=%d\n", rwflag,
ReqSector, FDC1772_READ(FDC1772REG_TRACK)));
fd_select_side(ReqSide);
/*DPRINT(("fd_rwsec() before start sector \n")); */
/* Start sector of this operation */
#ifdef TRACKBUFFER
FDC1772_WRITE( FDC1772REG_SECTOR, !read_track ? ReqSector : 1 );
#else
FDC1772_WRITE( FDC1772REG_SECTOR, ReqSector );
#endif
/* Cheat for track if stretch != 0 */
if (unit[SelectedDrive].disktype->stretch) {
track = FDC1772_READ(FDC1772REG_TRACK);
FDC1772_WRITE(FDC1772REG_TRACK, track >>
unit[SelectedDrive].disktype->stretch);
}
static void fd_motor_off_timer(unsigned long dummy)
{
unsigned long flags;
unsigned char status;
int delay;
del_timer(&motor_off_timer);
if (SelectedDrive < 0)
/* no drive selected, needn't deselect anyone */
return;
save_flags(flags);
cli();
if (fdc_busy) /* was stdma_islocked */
goto retry;
status = FDC1772_READ(FDC1772REG_STATUS);
if (!(status & 0x80)) {
/*
* motor already turned off by FDC1772 -> deselect drives
* In actual fact its this deselection which turns the motor
* off on the Arc, since the motor control is actually on
* Latch A
*/
DPRINT(("fdc1772: deselecting in fd_motor_off_timer\n"));
fd_deselect();
MotorOn = 0;
restore_flags(flags);
return;
}
/* not yet off, try again */
retry:
restore_flags(flags);
/* Test again later; if tested too often, it seems there is no disk
* in the drive and the FDC1772 will leave the motor on forever (or,
* at least until a disk is inserted). So we'll test only twice
* per second from then on...
*/
delay = (MotorOffTrys < FD_MOTOR_OFF_MAXTRY) ?
(++MotorOffTrys, HZ / 20) : HZ / 2;
START_MOTOR_OFF_TIMER(delay);
}