/* 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;
}
/* Issue a tape command:
*/
int ftape_command(qic117_cmd_t command)
{
int result = 0;
static int level;
TRACE_FUN(ft_t_any);
if ((unsigned int)command > NR_ITEMS(qic117_cmds)) {
/* This is a bug we'll want to know about too.
*/
TRACE_ABORT(-EIO, ft_t_bug, "bug - bad command: %d", command);
}
if (++level > 5) { /* This is a bug we'll want to know about. */
--level;
TRACE_ABORT(-EIO, ft_t_bug, "bug - recursion for command: %d",
command);
}
/* disable logging and restriction check for some commands,
* check all other commands that have a prescribed starting
* status.
*/
if (diagnostic_mode) {
TRACE(ft_t_flow, "diagnostic command %d", command);
} else if (command == QIC_REPORT_DRIVE_STATUS ||
command == QIC_REPORT_NEXT_BIT) {
TRACE(ft_t_any, "%s", qic117_cmds[command].name);
} else {
TRACE_CATCH(ft_check_cmd_restrictions(command), --level);
}
/* Now all conditions are met or result was < 0.
*/
result = ft_send_to_drive((unsigned int)command);
if (qic117_cmds[command].cmd_type == motion &&
command != QIC_LOGICAL_FORWARD && command != QIC_STOP_TAPE) {
ft_location.known = 0;
}
ftape_current_command = command;
--level;
TRACE_EXIT result;
}
int ftape_set_data_rate(unsigned int new_rate /* Kbps */, unsigned int qic_std)
{
int status;
int result = 0;
unsigned int data_rate = new_rate;
static int supported;
int rate_changed = 0;
qic_model dummy_model;
unsigned int dummy_qic_std, dummy_tape_len;
TRACE_FUN(ft_t_any);
if (ft_drive_max_rate == 0) { /* first time */
supported = ftape_set_rate_test(&ft_drive_max_rate);
}
if (supported) {
ftape_command(QIC_SELECT_RATE);
result = ftape_parameter_wait(qic_rate_code(new_rate),
1 * FT_SECOND, &status);
if (result >= 0 && !(status & QIC_STATUS_ERROR)) {
rate_changed = 1;
}
}
TRACE_CATCH(result = ftape_report_configuration(&dummy_model,
&data_rate,
&dummy_qic_std,
&dummy_tape_len),);
if (data_rate != new_rate) {
if (!supported) {
TRACE(ft_t_warn, "Rate change not supported!");
} else if (rate_changed) {
TRACE(ft_t_warn, "Requested: %d, got %d",
new_rate, data_rate);
} else {
TRACE(ft_t_warn, "Rate change failed!");
}
result = -EINVAL;
}
/*
* Set data rate and write precompensation as specified:
*
* | QIC-40/80 | QIC-3010/3020
* rate | precomp | precomp
* ----------+-------------+--------------
* 250 Kbps. | 250 ns. | 0 ns.
* 500 Kbps. | 125 ns. | 0 ns.
* 1 Mbps. | 42 ns. | 0 ns.
* 2 Mbps | N/A | 0 ns.
*/
if ((qic_std == QIC_TAPE_QIC40 && data_rate > 500) ||
(qic_std == QIC_TAPE_QIC80 && data_rate > 1000)) {
TRACE_ABORT(-EINVAL,
ft_t_warn, "Datarate too high for QIC-mode");
}
TRACE_CATCH(fdc_set_data_rate(data_rate),_res = -EINVAL);
ft_data_rate = data_rate;
if (qic_std == QIC_TAPE_QIC40 || qic_std == QIC_TAPE_QIC80) {
switch (data_rate) {
case 250:
fdc_set_write_precomp(250);
break;
default:
case 500:
fdc_set_write_precomp(125);
break;
case 1000:
fdc_set_write_precomp(42);
break;
}
} else {
fdc_set_write_precomp(0);
}
TRACE_EXIT result;
}
