/*
* This routine is called when everything should be correctly set up
* for the transfer (ie floppy motor is on and the correct floppy is
* selected).
*/
static void transfer(void)
{
read_track = (command == FD_READ) && (CURRENT_ERRORS < 4) &&
(floppy->sect <= MAX_BUFFER_SECTORS);
if (cur_spec1 != floppy->spec1) {
cur_spec1 = floppy->spec1;
output_byte(FD_SPECIFY);
output_byte(cur_spec1); /* hut etc */
output_byte(6); /* Head load time =6ms, DMA */
}
if (cur_rate != floppy->rate) {
/* use bit 6 of floppy->rate to indicate perpendicular mode */
perpendicular_mode(floppy->rate);
outb_p(cur_rate = ((floppy->rate)) & ~0x40, FD_DCR);
}
if (reset) {
redo_fd_request();
return;
}
if (!seek) {
setup_rw_floppy();
return;
}
do_floppy = seek_interrupt;
output_byte(FD_SEEK);
if (read_track)
output_byte(current_drive);
else
output_byte((head<<2) | current_drive);
output_byte(seek_track);
if (reset)
redo_fd_request();
}
/*
* This has only been tested for the case fdc_version == FDC_TYPE_STD.
* In case you have a 82077 and want to test it, you'll have to compile
* with `FDC_FIFO_UNTESTED' defined. You may also want to add support for
* recognizing drives with vertical recording support.
*/
static void configure_fdc_mode(void)
{
if (need_configure && (fdc_version == FDC_TYPE_82077)) {
/* Enhanced version with FIFO & vertical recording. */
output_byte(FD_CONFIGURE);
output_byte(0);
output_byte(0x1A); /* FIFO on, polling off, 10 byte threshold */
output_byte(0); /* precompensation from track 0 upwards */
need_configure = 0;
printk(DEVICE_NAME ": FIFO enabled\n");
}
if (cur_spec1 != floppy->spec1) {
cur_spec1 = floppy->spec1;
output_byte(FD_SPECIFY);
output_byte(cur_spec1); /* hut etc */
output_byte(6); /* Head load time =6ms, DMA */
}
if (cur_rate != floppy->rate) {
/* use bit 6 of floppy->rate to indicate perpendicular mode */
perpendicular_mode(floppy->rate);
outb_p((cur_rate = (floppy->rate)) & ~0x40, FD_DCR);
}
} /* configure_fdc_mode */
