int ftape_wakeup_drive(wake_up_types method)
{
int status;
int motor_on = 0;
TRACE_FUN(ft_t_any);
switch (method) {
case wake_up_colorado:
TRACE_CATCH(ftape_command(QIC_PHANTOM_SELECT),);
TRACE_CATCH(ftape_parameter(0 /* ft_drive_sel ?? */),);
break;
case wake_up_mountain:
TRACE_CATCH(ftape_command(QIC_SOFT_SELECT),);
ftape_sleep(FT_MILLISECOND); /* NEEDED */
TRACE_CATCH(ftape_parameter(18),);
break;
case wake_up_insight:
ftape_sleep(100 * FT_MILLISECOND);
motor_on = 1;
fdc_motor(motor_on); /* enable is done by motor-on */
case no_wake_up:
break;
default:
TRACE_EXIT -ENODEV; /* unknown wakeup method */
break;
}
/* If wakeup succeeded we shouldn't get an error here..
*/
TRACE_CATCH(ftape_report_raw_drive_status(&status),
if (motor_on) {
fdc_motor(0);
});
/* Wait for the drive to get ready.
* timeout time in milli-seconds
* Returned status is valid if result != -EIO
*
* Should we allow to be killed by SIGINT? (^C)
* Would be nice at least for large timeouts.
*/
int ftape_ready_wait(unsigned int timeout, int *status)
{
unsigned long t0;
unsigned int poll_delay;
int signal_retries;
TRACE_FUN(ft_t_any);
/* the following ** REALLY ** reduces the system load when
* e.g. one simply rewinds or retensions. The tape is slow
* anyway. It is really not necessary to detect error
* conditions with 1/10 seconds granularity
*
* On my AMD 133MHZ 486: 100 ms: 23% system load
* 1 sec: 5%
* 5 sec: 0.6%, yeah
*/
if (timeout <= FT_SECOND) {
poll_delay = 100 * FT_MILLISECOND;
signal_retries = 20; /* two seconds */
} else if (timeout < 20 * FT_SECOND) {
TRACE(ft_t_flow, "setting poll delay to 1 second");
poll_delay = FT_SECOND;
signal_retries = 2; /* two seconds */
} else {
TRACE(ft_t_flow, "setting poll delay to 5 seconds");
poll_delay = 5 * FT_SECOND;
signal_retries = 1; /* five seconds */
}
for (;;) {
t0 = jiffies;
TRACE_CATCH(ftape_report_raw_drive_status(status),);
if (*status & QIC_STATUS_READY) {
TRACE_EXIT 0;
}
if (!signal_retries--) {
FT_SIGNAL_EXIT(_NEVER_BLOCK);
}
if ((int)timeout >= 0) {
/* this will fail when jiffies wraps around about
* once every year :-)
*/
timeout -= ((jiffies - t0) * FT_SECOND) / HZ;
if (timeout <= 0) {
TRACE_ABORT(-ETIME, ft_t_err, "timeout");
}
ftape_sleep(poll_delay);
timeout -= poll_delay;
} else {
ftape_sleep(poll_delay);
}
}
TRACE_EXIT -ETIME;
}
/* Called by modules package when installing the driver
* or by kernel during the initialization phase
*/
static int __init ftape_init(void)
{
TRACE_FUN(ft_t_flow);
#ifdef MODULE
#ifndef CONFIG_FT_NO_TRACE_AT_ALL
if (ft_tracing != -1) {
ftape_tracing = ft_tracing;
}
#endif
printk(KERN_INFO FTAPE_VERSION "\n");
if (TRACE_LEVEL >= ft_t_info) {
printk(
KERN_INFO "(c) 1993-1996 Bas Laarhoven ([email protected])\n"
KERN_INFO "(c) 1995-1996 Kai Harrekilde-Petersen ([email protected])\n"
KERN_INFO "(c) 1996-1997 Claus-Justus Heine ([email protected])\n"
KERN_INFO "QIC-117 driver for QIC-40/80/3010/3020 floppy tape drives\n"
KERN_INFO "Compiled for Linux version %s\n", UTS_RELEASE);
}
#else /* !MODULE */
/* print a short no-nonsense boot message */
printk(KERN_INFO FTAPE_VERSION " for Linux " UTS_RELEASE "\n");
#endif /* MODULE */
TRACE(ft_t_info, "installing QIC-117 floppy tape hardware drive ... ");
TRACE(ft_t_info, "ftape_init @ 0x%p", ftape_init);
/* Allocate the DMA buffers. They are deallocated at cleanup() time.
*/
#if TESTING
#ifdef MODULE
while (ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS) < 0) {
ftape_sleep(FT_SECOND/20);
if (signal_pending(current)) {
(void)ftape_set_nr_buffers(0);
TRACE(ft_t_bug,
"Killed by signal while allocating buffers.");
TRACE_ABORT(-EINTR,
ft_t_bug, "Free up memory and retry");
}
}
#else
TRACE_CATCH(ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS),
(void)ftape_set_nr_buffers(0));
#endif
#else
TRACE_CATCH(ftape_set_nr_buffers(CONFIG_FT_NR_BUFFERS),
(void)ftape_set_nr_buffers(0));
#endif
ft_drive_sel = -1;
ft_failure = 1; /* inhibit any operation but open */
ftape_udelay_calibrate(); /* must be before fdc_wait_calibrate ! */
fdc_wait_calibrate();
#if defined(CONFIG_PROC_FS) && defined(CONFIG_FT_PROC_FS)
(void)ftape_proc_init();
#endif
#ifdef CONFIG_ZFTAPE
(void)zft_init();
#endif
TRACE_EXIT 0;
}
/* send a command or parameter to the drive
* Generates # of step pulses.
*/
static inline int ft_send_to_drive(int arg)
{
/* Always wait for a command_timeout period to separate
* individuals commands and/or parameters.
*/
ftape_sleep(3 * FT_MILLISECOND);
/* Keep cylinder nr within range, step towards home if possible.
*/
if (ftape_current_cylinder >= arg) {
return fdc_seek(ftape_current_cylinder - arg);
} else {
return fdc_seek(ftape_current_cylinder + arg);
}
}
int ftape_report_operation(int *status,
qic117_cmd_t command,
int result_length)
{
int i, st3;
unsigned int t0;
unsigned int dt;
TRACE_FUN(ft_t_any);
TRACE_CATCH(ftape_command(command),);
t0 = ftape_timestamp();
i = 0;
do {
++i;
ftape_sleep(3 * FT_MILLISECOND); /* see remark below */
TRACE_CATCH(fdc_sense_drive_status(&st3),);
dt = ftape_timediff(t0, ftape_timestamp());
/* Ack should be asserted within Ttimout + Tack = 6 msec.
* Looks like some drives fail to do this so extend this
* period to 300 msec.
*/
} while (!(st3 & ST3_TRACK_0) && dt < 300000);
if (!(st3 & ST3_TRACK_0)) {
TRACE(ft_t_err,
"No acknowledge after %u msec. (%i iter)", dt / 1000, i);
TRACE_ABORT(-EIO, ft_t_err, "timeout on Acknowledge");
}
/* dt may be larger than expected because of other tasks
* scheduled while we were sleeping.
*/
if (i > 1 && dt > 6000) {
TRACE(ft_t_err, "Acknowledge after %u msec. (%i iter)",
dt / 1000, i);
}
*status = 0;
for (i = 0; i < result_length + 1; i++) {
TRACE_CATCH(ftape_command(QIC_REPORT_NEXT_BIT),);
TRACE_CATCH(fdc_sense_drive_status(&st3),);
if (i < result_length) {
*status |= ((st3 & ST3_TRACK_0) ? 1 : 0) << i;
} else if ((st3 & ST3_TRACK_0) == 0) {
TRACE_ABORT(-EIO, ft_t_err, "missing status stop bit");
}
}
/* this command will put track zero and index back into normal state */
(void)ftape_command(QIC_REPORT_NEXT_BIT);
TRACE_EXIT 0;
}
