int ftape_init_drive(int *formatted)
{
TRACE_FUN(5, "ftape_init_drive");
int result = 0;
int status;
result = ftape_report_raw_drive_status(&status);
if (result >= 0 && (status & QIC_STATUS_CARTRIDGE_PRESENT)) {
if (!(status & QIC_STATUS_AT_BOT)) {
/* Antique drives will get here after a soft reset,
* modern ones only if the driver is loaded when the
* tape wasn't rewound properly.
*/
ftape_seek_to_bot();
}
if (!(status & QIC_STATUS_REFERENCED)) {
TRACE(5, "starting seek_load_point");
result = ftape_command_wait(QIC_SEEK_LOAD_POINT,
timeout.reset, &status);
if (result < 0) {
TRACE(1, "seek_load_point failed (command)");
}
}
}
if (result >= 0) {
int rate;
*formatted = (status & QIC_STATUS_REFERENCED);
if (!*formatted) {
TRACE(1, "Warning: tape is not formatted !");
}
/* Select highest rate supported by both fdc and drive.
* Start with highest rate supported by the fdc.
*/
if (fdc.type >= i82078_1)
rate = 0;
else if (fdc.type >= i82077)
rate = 1;
else
rate = 2;
do {
result = ftape_set_data_rate(rate);
if (result >= 0) {
ftape_calc_timeouts();
break;
}
++rate;
} while (rate < 4);
if (result < 0) {
result = -EIO;
}
}
if (result >= 0) {
/* Tape should be at bot if new cartridge ! */
ftape_new_cartridge();
}
init_drive_needed = 0;
TRACE_EXIT;
return result;
}
static int ft_check_cmd_restrictions(qic117_cmd_t command)
{
int status = -1;
TRACE_FUN(ft_t_any);
TRACE(ft_t_flow, "%s", qic117_cmds[command].name);
/* A new motion command during an uninterruptible (motion)
* command requires a ready status before the new command can
* be issued. Otherwise a new motion command needs to be
* checked against required status.
*/
if (qic117_cmds[command].cmd_type == motion &&
qic117_cmds[ftape_current_command].non_intr) {
ftape_report_raw_drive_status(&status);
if ((status & QIC_STATUS_READY) == 0) {
TRACE(ft_t_noise,
"motion cmd (%d) during non-intr cmd (%d)",
command, ftape_current_command);
TRACE(ft_t_noise, "waiting until drive gets ready");
ftape_ready_wait(ftape_timeout.seek,
&status);
}
}
if (qic117_cmds[command].mask != 0) {
__u8 difference;
/* Some commands do require a certain status:
*/
if (status == -1) { /* not yet set */
ftape_report_raw_drive_status(&status);
}
difference = ((status ^ qic117_cmds[command].state) &
qic117_cmds[command].mask);
/* Wait until the drive gets
* ready. This may last forever if
* the drive never gets ready...
*/
while ((difference & QIC_STATUS_READY) != 0) {
TRACE(ft_t_noise, "command %d issued while not ready",
command);
TRACE(ft_t_noise, "waiting until drive gets ready");
if (ftape_ready_wait(ftape_timeout.seek,
&status) == -EINTR) {
/* Bail out on signal !
*/
TRACE_ABORT(-EINTR, ft_t_warn,
"interrupted by non-blockable signal");
}
difference = ((status ^ qic117_cmds[command].state) &
qic117_cmds[command].mask);
}
while ((difference & QIC_STATUS_ERROR) != 0) {
int err;
qic117_cmd_t cmd;
TRACE(ft_t_noise,
"command %d issued while error pending",
command);
TRACE(ft_t_noise, "clearing error status");
ftape_report_error(&err, &cmd, 1);
ftape_report_raw_drive_status(&status);
difference = ((status ^ qic117_cmds[command].state) &
qic117_cmds[command].mask);
if ((difference & QIC_STATUS_ERROR) != 0) {
/* Bail out on fatal signal !
*/
FT_SIGNAL_EXIT(_NEVER_BLOCK);
}
}
if (difference) {
/* Any remaining difference can't be solved
* here.
*/
if (difference & (QIC_STATUS_CARTRIDGE_PRESENT |
QIC_STATUS_NEW_CARTRIDGE |
QIC_STATUS_REFERENCED)) {
TRACE(ft_t_warn,
"Fatal: tape removed or reinserted !");
ft_failure = 1;
} else {
TRACE(ft_t_err, "wrong state: 0x%02x should be: 0x%02x",
status & qic117_cmds[command].mask,
qic117_cmds[command].state);
}
TRACE_EXIT -EIO;
}
if (~status & QIC_STATUS_READY & qic117_cmds[command].mask) {
TRACE_ABORT(-EBUSY, ft_t_err, "Bad: still busy!");
}
}
TRACE_EXIT 0;
}
