1 /* $Id: tpqic02.c,v 1.10 1997/01/26 07:13:20 davem Exp $
3 * Driver for tape drive support for Linux-i386
5 * Copyright (c) 1992--1996 by H. H. Bergman. All rights reserved.
6 * Current e-mail address: hennus@cybercomm.nl
8 * Distribution of this program in executable form is only allowed if
9 * all of the corresponding source files are made available through the same
10 * medium at no extra cost.
12 * I will not accept any responsibility for damage caused directly or
13 * indirectly by this program, or code derived from this program.
15 * Use this code at your own risk. Don't blame me if it destroys your data!
16 * Make sure you have a backup before you try this code.
18 * If you make changes to my code and redistribute it in source or binary
19 * form you must make it clear to even casual users of your code that you
20 * have modified my code, clearly point out what the changes exactly are
21 * (preferably in the form of a context diff file), how to undo your changes,
22 * where the original can be obtained, and that complaints/requests about the
23 * modified code should be directed to you instead of me.
25 * This driver was partially inspired by the 'wt' driver in the 386BSD
26 * source distribution, which carries the following copyright notice:
28 * Copyright (c) 1991 The Regents of the University of California.
29 * All rights reserved.
31 * You are not allowed to change this line nor the text above.
33 * 1996/10/10 Emerald changes
35 * 1996/05/21 Misc changes+merges+cleanups + I/O reservations
37 * 1996/05/20 Module support patches submitted by Brian McCauley.
39 * 1994/05/03 Initial attempt at Mountain support for the Mountain 7150.
40 * Based on patches provided by Erik Jacobson. Still incomplete, I suppose.
42 * 1994/02/07 Archive changes & some cleanups by Eddy Olk.
44 * 1994/01/19 Speed measuring stuff moved from aperf.h to delay.h.
45 * BogoMips (tm) introduced by Linus.
47 * 1993/01/25 Kernel udelay. Eof fixups.
49 * 1992/09/19 Some changes based on patches by Eddy Olk to support
50 * Archive SC402/SC499R controller cards.
52 * 1992/05/27 First release.
54 * 1992/05/26 Initial version. Copyright H. H. Bergman 1992
57 /* After the legalese, now the important bits:
59 * This is a driver for the Wangtek 5150 tape drive with
60 * a QIC-02 controller for ISA-PC type computers.
61 * Hopefully it will work with other QIC-02 tape drives as well.
63 * Make sure your setup matches the configuration parameters.
64 * Also, be careful to avoid IO conflicts with other devices!
72 #define REALLY_SLOW_IO /* it sure is ... */
74 #include <linux/module.h>
76 #include <linux/config.h>
78 #include <linux/module.h>
79 #include <linux/sched.h>
80 #include <linux/timer.h>
82 #include <linux/kernel.h>
83 #include <linux/major.h>
84 #include <linux/errno.h>
85 #include <linux/mtio.h>
86 #include <linux/fcntl.h>
87 #include <linux/delay.h>
88 #include <linux/ioport.h>
89 #include <linux/tpqic02.h>
91 #include <linux/malloc.h>
92 #include <linux/init.h>
95 #include <asm/system.h>
97 #include <asm/uaccess.h>
99 /* check existence of required configuration parameters */
100 #if !defined(QIC02_CMD_PORT) || !defined(QIC02_TAPE_IRQ) || !defined(QIC02_TAPE_DMA)
101 # error qic02_tape configuration error
105 #define TPQIC02_NAME "tpqic02"
107 /* Linux outb() commands have (value,port) as parameters.
108 * One might expect (port,value) instead, so beware!
111 #ifdef CONFIG_QIC02_DYNCONF
112 /* This holds the dynamic configuration info for the interface
113 * card+drive info if runtime configuration has been selected.
116 static struct mtconfiginfo qic02_tape_dynconf
= /* user settable */
117 { 0, 0, BOGUS_IRQ
, 0, 0, TPQD_DEFAULT_FLAGS
, };
118 static struct qic02_ccb qic02_tape_ccb
= { 0, }; /* private stuff */
122 unsigned long qic02_tape_debug
= TPQD_DEFAULT_FLAGS
;
124 # if ((QIC02_TAPE_IFC!=WANGTEK) && (QIC02_TAPE_IFC!=ARCHIVE) && (QIC02_TAPE_IFC!=MOUNTAIN))
125 # error No valid interface card specified
127 #endif /* CONFIG_QIC02_DYNCONF */
129 static volatile int ctlbits
= 0; /* control reg bits for tape interface */
131 static struct wait_queue
*qic02_tape_transfer
= NULL
; /* sync rw with interrupts */
133 static volatile struct mtget ioctl_status
; /* current generic status */
135 static volatile struct tpstatus tperror
; /* last drive status */
137 static char rcs_revision
[] = "$Revision: 1.10 $";
138 static char rcs_date
[] = "$Date: 1997/01/26 07:13:20 $";
140 /* Flag bits for status and outstanding requests.
141 * (Could all be put in one bit-field-struct.)
142 * Some variables need `volatile' because they may be modified
145 static volatile flag status_dead
= YES
; /* device is legally dead until proven alive */
146 static flag status_zombie
= YES
; /* it's `zombie' until irq/dma allocated */
148 static volatile flag status_bytes_wr
= NO
; /* write FM at close or not */
149 static volatile flag status_bytes_rd
= NO
; /* (rd|wr) used for rewinding */
151 static volatile unsigned long status_cmd_pending
= 0; /* cmd in progress */
152 static volatile flag status_expect_int
= NO
; /* ready for interrupts */
153 static volatile flag status_timer_on
= NO
; /* using time-out */
154 static volatile int status_error
= 0; /* int handler may detect error */
155 static volatile flag status_eof_detected
= NO
; /* end of file */
156 static volatile flag status_eom_detected
= NO
; /* end of recorded media */
157 static volatile flag status_eot_detected
= NO
; /* end of tape */
158 static volatile flag doing_read
= NO
;
159 static volatile flag doing_write
= NO
;
161 static volatile unsigned long dma_bytes_todo
;
162 static volatile unsigned long dma_bytes_done
;
163 static volatile unsigned dma_mode
= 0; /* !=0 also means DMA in use */
164 static flag need_rewind
= YES
;
166 static kdev_t current_tape_dev
;
167 static int extra_blocks_left
= BLOCKS_BEYOND_EW
;
172 * YES: tell app EOF was reached (return 0).
174 * return_*_eof==YES && reported_*_eof==NO ==>
175 * return current buffer, next time(s) return EOF.
177 * return_*_eof==YES && reported_*_eof==YES ==>
178 * at EOF and application knows it, so we can
179 * move on to the next file.
182 static flag return_read_eof
= NO
; /* set to signal app EOF was reached */
183 static flag return_write_eof
= NO
;
184 static flag reported_read_eof
= NO
; /* set when we've done that */
185 static flag reported_write_eof
= NO
;
188 /* This is for doing `mt seek <blocknr>' */
189 static char seek_addr_buf
[AR_SEEK_BUF_SIZE
];
192 /* In write mode, we have to write a File Mark after the last block written,
193 * when the tape device is closed. Tape repositioning and reading in write
194 * mode is allowed as long as no actual writing has been done. After writing
195 * the File Mark, repositioning and reading are allowed again.
197 static int mode_access
; /* access mode: READ or WRITE */
199 static int qic02_get_resources(void);
200 static void qic02_release_resources(void);
202 /* This is a pointer to the actual kernel buffer where the interrupt routines
203 * read from/write to. It is needed because the DMA channels 1 and 3 cannot
204 * always access the user buffers. [The kernel buffer must reside in the
205 * lower 16MBytes of system memory because of the DMA controller.] The user
206 * must ensure that a large enough buffer is passed to the kernel, in order
207 * to reduce tape repositioning wear and tear.
209 static unsigned long buffaddr
= 0; /* physical address of buffer */
211 /* This translates minor numbers to the corresponding recording format: */
212 static const char *format_names
[] = {
213 "not set", /* for dumb drives unable to handle format selection */
218 "300", /* untested. */
219 "600" /* untested. */
223 /* `exception_list' is needed for exception status reporting.
224 * Exceptions 1..14 are defined by QIC-02 rev F.
225 * The drive status is matched sequentially to each entry,
226 * ignoring irrelevant bits, until a match is found. If no
227 * match is found, exception number 0 is used. (That should of
228 * course never happen...) The original table was based on the
229 * "Exception Status Summary" in QIC-02 rev F, but some changes
230 * were required to make it work with real-world drives.
232 * Exception 2 (CNI) is changed to also cover status 0x00e0 (mask USL),
233 * Exception 4 (EOM) is changed to also cover status 0x8288 (mask EOR),
234 * Exception 11 (FIL) is changed to also cover status 0x0089 (mask EOM).
235 * Exception 15 (EOR) is added for seek-to-end-of-data (catch EOR),
236 * Exception 16 (BOM) is added for beginning-of-media (catch BOM).
238 * Had to swap EXC_NDRV and EXC_NCART to ensure that extended EXC_NCART
239 * (because of the incorrect Wangtek status code) doesn't catch the
242 static struct exception_list_type
{
243 unsigned short mask
, code
;
245 /* EXC_nr attribute should match with tpqic02.h */
246 } exception_list
[] = {
248 "Unknown exception status code", /* extra: 0 */},
249 {~(0), TP_ST0
|TP_CNI
|TP_USL
|TP_WRP
,
250 "Drive not online" /* 1 */},
251 /* Drive presence goes before cartridge presence. */
252 {~(TP_WRP
|TP_USL
), TP_ST0
|TP_CNI
,
253 /* My Wangtek 5150EQ sometimes reports a status code
254 * of 0x00e0, which is not a valid exception code, but
255 * I think it should be recognized as "NO CARTRIDGE".
257 "Cartridge not in place" /* 2 */},
258 {(unsigned short) ~(TP_ST1
|TP_BOM
), (TP_ST0
|TP_WRP
),
259 "Write protected cartridge" /* 3 */},
260 {(unsigned short) ~(TP_ST1
|TP_EOR
), (TP_ST0
|TP_EOM
),
261 "End of media" /* 4 */},
262 {~TP_WRP
, TP_ST0
|TP_UDA
| TP_ST1
|TP_BOM
,
263 "Read or Write abort. Rewind tape." /* 5 */},
264 {~TP_WRP
, TP_ST0
|TP_UDA
,
265 "Read error. Bad block transferred." /* 6 */},
266 {~TP_WRP
, TP_ST0
|TP_UDA
|TP_BNL
,
267 "Read error. Filler block transferred." /* 7 */},
268 {~TP_WRP
, TP_ST0
|TP_UDA
|TP_BNL
|TP_ST1
|TP_NDT
,
269 "Read error. No data detected." /* 8 */},
270 {~TP_WRP
, TP_ST0
|TP_EOM
|TP_UDA
|TP_BNL
|TP_ST1
|TP_NDT
,
271 "Read error. No data detected. EOM." /* 9 */},
272 {~(TP_WRP
|TP_MBD
|TP_PAR
|TP_EOR
), TP_ST0
|TP_UDA
|TP_BNL
|TP_ST1
|TP_NDT
|TP_BOM
,
273 "Read error. No data detected. BOM." /* 10 */},
274 {~(TP_WRP
|TP_EOM
), TP_ST0
|TP_FIL
,
275 /* Status 0x0089 (EOM & FM) is viewed as an FM,
276 * because it can only happen during a read.
277 * EOM is checked separately for an FM condition.
279 "File mark detected" /* 11 */},
280 {~(TP_ST0
|TP_CNI
|TP_USL
|TP_WRP
|TP_BOM
), TP_ST1
|TP_ILL
,
281 "Illegal command" /* 12 */},
282 {~(TP_ST0
|TP_CNI
|TP_USL
|TP_WRP
|TP_BOM
), TP_ST1
|TP_POR
,
283 "Reset occurred" /* 13 */},
284 {~TP_WRP
, TP_ST0
|TP_FIL
|TP_MBD
, /* NOTE: ST1 not set! */
285 "Marginal block detected" /* 14 */},
286 {~(TP_ST0
|TP_WRP
|TP_EOM
|TP_UDA
|TP_BNL
|TP_FIL
|TP_NDT
), TP_ST1
|TP_EOR
,
287 /********** Is the extra TP_NDT really needed Eddy? **********/
288 "End of recorded media" /* extra: 15 */},
289 /* 15 is returned when SEEKEOD completes successfully */
290 {~(TP_WRP
|TP_ST0
), TP_ST1
|TP_BOM
,
291 "Beginning of media" /* extra: 16 */}
293 #define NR_OF_EXC (sizeof(exception_list)/sizeof(struct exception_list_type))
295 /* Compare expected struct size and actual struct size. This
296 * is useful to catch programs compiled with old #includes.
298 #define CHECK_IOC_SIZE(structure) \
299 if (_IOC_SIZE(iocmd) != sizeof(struct structure)) { \
300 tpqputs(TPQD_ALWAYS, "sizeof(struct " #structure \
301 ") does not match!"); \
305 static void tpqputs(unsigned long flags, const char *s)
307 if ((flags
& TPQD_ALWAYS
) || (flags
& QIC02_TAPE_DEBUG
))
308 printk(TPQIC02_NAME
": %s\n", s
);
312 /* Perform byte order swapping for a 16-bit word.
314 * [FIXME] This should probably be in include/asm/
315 * ([FIXME] i486 can do this faster)
317 static inline void byte_swap_w(volatile unsigned short * w
)
321 *w
= (t
>>8) | ((t
& 0xff)<<8);
326 /* Init control register bits on interface card.
327 * For Archive, interrupts must be enabled explicitly.
328 * Wangtek interface card requires ONLINE to be set, Archive SC402/SC499R
329 * cards keep it active all the time.
331 static void ifc_init(void)
333 if (QIC02_TAPE_IFC
== WANGTEK
) /* || (QIC02_TAPE_IFC == EVEREX) */
335 ctlbits
= WT_CTL_ONLINE
; /* online */
336 outb_p(ctlbits
, QIC02_CTL_PORT
);
338 else if (QIC02_TAPE_IFC
== ARCHIVE
)
340 ctlbits
= 0; /* no interrupts yet */
341 outb_p(ctlbits
, QIC02_CTL_PORT
);
342 outb_p(0, AR_RESET_DMA_PORT
); /* dummy write to reset DMA */
346 ctlbits
= MTN_CTL_ONLINE
; /* online, and logic enabled */
347 outb_p(ctlbits
, QIC02_CTL_PORT
);
352 static void report_qic_exception(unsigned n
)
356 tpqputs(TPQD_ALWAYS
, "Oops -- report_qic_exception");
359 if (TPQDBG(SENSE_TEXT
) || n
==0)
361 printk(TPQIC02_NAME
": sense: %s\n", exception_list
[n
].msg
);
363 } /* report_qic_exception */
366 /* Try to map the drive-exception bits `s' to a predefined "exception number",
367 * by comparing the significant exception bits for each entry in the
368 * exception table (`exception_list[]').
369 * It is assumed that s!=0.
371 static int decode_qic_exception_nr(unsigned s
)
375 for (i
=1; i
<NR_OF_EXC
; i
++)
377 if ((s
& exception_list
[i
].mask
)==exception_list
[i
].code
)
382 printk(TPQIC02_NAME
": decode_qic_exception_nr: exception(%x) not recognized\n", s
);
384 } /* decode_qic_exception_nr */
388 /* Perform appropriate action for certain exceptions.
389 * should return a value to indicate stop/continue (in case of bad blocks)
391 static void handle_qic_exception(int exnr
, int exbits
)
395 /* Cartridge was changed. Redo sense().
396 * EXC_NCART should be handled in open().
397 * It is not permitted to remove the tape while
398 * the tape driver has open files.
401 status_eof_detected
= NO
;
402 status_eom_detected
= NO
;
404 else if (exnr
==EXC_XFILLER
)
406 tpqputs(TPQD_ALWAYS
, "[Bad block -- filler data transferred.]");
408 else if (exnr
==EXC_XBAD
)
410 tpqputs(TPQD_ALWAYS
, "[CRC failed!]");
412 else if (exnr
==EXC_MARGINAL
)
414 /* A marginal block behaves much like a FM.
415 * User may continue reading, if desired.
417 tpqputs(TPQD_ALWAYS
, "[Marginal block]");
420 else if (exnr
==EXC_FM
)
424 } /* handle_qic_exception */
427 static inline int is_exception(void)
429 return (inb(QIC02_STAT_PORT
) & QIC02_STAT_EXCEPTION
) == 0;
433 /* Reset the tape drive and controller.
434 * When reset fails, it marks the drive as dead and all
435 * requests (except reset) are to be ignored (ENXIO).
437 static int tape_reset(int verbose
)
439 ifc_init(); /* reset interface card */
442 if (QIC02_TAPE_IFC
== MOUNTAIN
)
444 outb_p(ctlbits
& ~MTN_QIC02_CTL_RESET_NOT
, QIC02_CTL_PORT
);
446 else /* WANGTEK, ARCHIVE */
448 outb_p(ctlbits
| QIC02_CTL_RESET
, QIC02_CTL_PORT
);
451 /* Next, we need to wait >=25 usec. */
454 /* after reset, we will be at BOT (modulo an automatic rewind) */
455 status_eof_detected
= NO
;
456 status_eom_detected
= NO
;
457 status_cmd_pending
= 0;
459 doing_read
= doing_write
= NO
;
460 ioctl_status
.mt_fileno
= ioctl_status
.mt_blkno
= 0;
462 /* de-assert reset */
463 if (QIC02_TAPE_IFC
== MOUNTAIN
)
465 outb_p(ctlbits
| MTN_QIC02_CTL_RESET_NOT
, QIC02_CTL_PORT
);
469 outb_p(ctlbits
& ~QIC02_CTL_RESET
, QIC02_CTL_PORT
);
472 /* KLUDGE FOR G++ BUG */
473 { int stat
= inb_p(QIC02_STAT_PORT
);
474 status_dead
= ((stat
& QIC02_STAT_RESETMASK
) != QIC02_STAT_RESETVAL
); }
475 /* if successful, inb(STAT) returned RESETVAL */
476 if (status_dead
== YES
)
478 printk(TPQIC02_NAME
": reset failed!\n");
482 printk(TPQIC02_NAME
": reset successful\n");
485 return (status_dead
== YES
)? TE_DEAD
: TE_OK
;
490 /* Notify tape drive of a new command. It only waits for the
491 * command to be accepted, not for the actual command to complete.
493 * Before calling this routine, QIC02_CMD_PORT must have been loaded
494 * with the command to be executed.
495 * After this routine, the exception bit must be checked.
496 * This routine is also used by rdstatus(), so in that case, any exception
497 * must be ignored (`ignore_ex' flag).
499 static int notify_cmd(char cmd
, short ignore_ex
)
503 outb_p(cmd
, QIC02_CMD_PORT
); /* output the command */
505 /* wait 1 usec before asserting /REQUEST */
508 if ((!ignore_ex
) && is_exception()) {
509 tpqputs(TPQD_ALWAYS
, "*** exception detected in notify_cmd");
510 /** force a reset here **/
511 if (tape_reset(1)==TE_DEAD
)
513 if (is_exception()) {
514 tpqputs(TPQD_ALWAYS
, "exception persists after reset.");
515 tpqputs(TPQD_ALWAYS
, " ^ exception ignored.");
519 outb_p(ctlbits
| QIC02_CTL_REQUEST
, QIC02_CTL_PORT
); /* set request bit */
520 i
= TAPE_NOTIFY_TIMEOUT
;
521 /* The specs say this takes about 500 usec, but there is no upper limit!
522 * If the drive were busy retensioning or something like that,
523 * it could be *much* longer!
525 while ((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_READY
) && (--i
>0))
526 /*skip*/; /* wait for ready */
528 tpqputs(TPQD_ALWAYS
, "timed out waiting for ready in notify_cmd");
533 outb_p(ctlbits
& ~QIC02_CTL_REQUEST
, QIC02_CTL_PORT
); /* reset request bit */
534 i
= TAPE_NOTIFY_TIMEOUT
;
535 /* according to the specs this one should never time-out */
536 while (((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_READY
) == 0) && (--i
>0))
537 /*skip*/; /* wait for not ready */
539 tpqputs(TPQD_ALWAYS
, "timed out waiting for !ready in notify_cmd");
543 /* command accepted */
549 /* Wait for a command to complete, with timeout */
550 static int wait_for_ready(time_t timeout
)
555 /* Wait for ready or exception, without driving the loadavg up too much.
556 * In most cases, the tape drive already has READY asserted,
557 * so optimize for that case.
559 * First, busy wait a few usec:
562 while (((stat
= inb_p(QIC02_STAT_PORT
) & QIC02_STAT_MASK
) == QIC02_STAT_MASK
) && (--spin_t
>0))
564 if ((stat
& QIC02_STAT_READY
) == 0)
565 return TE_OK
; /* covers 99.99% of all calls */
567 /* Then use schedule() a few times */
568 spin_t
= 3; /* max 0.03 sec busy waiting */
569 if (spin_t
> timeout
)
574 while (((stat
= inb_p(QIC02_STAT_PORT
) & QIC02_STAT_MASK
) == QIC02_STAT_MASK
) && (jiffies
<spin_t
))
575 schedule(); /* don't waste all the CPU time */
576 if ((stat
& QIC02_STAT_READY
) == 0)
579 /* If we reach this point, we probably need to wait much longer, or
580 * an exception occurred. Either case is not very time-critical.
581 * Check the status port only a few times every second.
582 * A interval of less than 0.10 sec will not be noticed by the user,
583 * more than 0.40 sec may give noticeable delays.
586 TPQDEB({printk("wait_for_ready: additional timeout: %d\n", spin_t
);})
588 /* not ready and no exception && timeout not expired yet */
589 while (((stat
= inb_p(QIC02_STAT_PORT
) & QIC02_STAT_MASK
) == QIC02_STAT_MASK
) && (jiffies
<spin_t
)) {
590 /* be `nice` to other processes on long operations... */
591 current
->timeout
= jiffies
+ 3*HZ
/10; /* nap 0.30 sec between checks, */
592 current
->state
= TASK_INTERRUPTIBLE
;
593 schedule(); /* but could be woken up earlier by signals... */
596 /* don't use jiffies for this test because it may have changed by now */
597 if ((stat
& QIC02_STAT_MASK
) == QIC02_STAT_MASK
) {
598 tpqputs(TPQD_ALWAYS
, "wait_for_ready() timed out");
602 if ((stat
& QIC02_STAT_EXCEPTION
) == 0) {
603 tpqputs(TPQD_ALWAYS
, "exception detected after waiting_for_ready");
608 } /* wait_for_ready */
612 /* Send some data to the drive */
613 static int send_qic02_data(char sb
[], unsigned size
, int ignore_ex
)
617 for (i
=0; i
<size
; i
++) {
619 stat
= wait_for_ready(TIM_S
);
623 stat
= notify_cmd(sb
[i
], ignore_ex
);
629 } /* send_qic02_data */
632 /* Send a QIC-02 command (`cmd') to the tape drive, with
633 * a time-out (`timeout').
634 * This one is also used by tp_sense(), so we must have
635 * a flag to disable exception checking (`ignore_ex').
637 * On entry, the controller is supposed to be READY.
639 static int send_qic02_cmd(int cmd
, time_t timeout
, int ignore_ex
)
643 stat
= inb_p(QIC02_STAT_PORT
);
644 if ((stat
& QIC02_STAT_EXCEPTION
) == 0) { /* if exception */
645 tpqputs(TPQD_ALWAYS
, "send_qic02_cmd: Exception!");
648 if (stat
& QIC02_STAT_READY
) { /* if not ready */
649 tpqputs(TPQD_ALWAYS
, "send_qic02_cmd: not Ready!");
653 /* assert(ready & !exception) */
655 /* Remember current command for later re-use with dma transfers.
656 * (For reading/writing multiple blocks.)
658 status_cmd_pending
= cmd
;
660 stat
= notify_cmd(cmd
, ignore_ex
); /* tell drive new command was loaded, */
661 /* inherit exception check. */
662 if (TP_HAVE_SEEK
&& (cmd
== AR_QCMDV_SEEK_BLK
)) {
663 /* This one needs to send 3 more bytes, MSB first */
664 stat
= send_qic02_data(seek_addr_buf
, sizeof(seek_addr_buf
), ignore_ex
);
668 tpqputs(TPQD_ALWAYS
, "send_qic02_cmd failed");
671 } /* send_qic02_cmd */
675 /* Get drive status. Assume drive is ready or has exception set.
676 * (or will be in <1000 usec.)
677 * Extra parameters added because of 'Read Extended Status 3' command.
679 static int rdstatus(char *stp
, unsigned size
, char qcmd
)
684 /* Try to busy-wait a few (700) usec, after that de-schedule.
686 * The problem is, if we don't de-schedule, performance will
687 * drop to zero when the drive is not responding and if we
688 * de-schedule immediately, we waste a lot of time because a
689 * task switch is much longer than we usually have to wait here.
691 n
= 1000; /* 500 is not enough on a 486/33 */
692 while ((n
>0) && ((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_MASK
) == QIC02_STAT_MASK
))
693 n
--; /* wait for ready or exception or timeout */
695 /* n (above) should be chosen such that on your machine
696 * you rarely ever see the message below, and it should
697 * be small enough to give reasonable response time.]
699 tpqputs(TPQD_ALWAYS
, "waiting looong in rdstatus() -- drive dead?");
700 while ((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_MASK
) == QIC02_STAT_MASK
)
702 tpqputs(TPQD_ALWAYS
, "finished waiting in rdstatus()");
705 (void) notify_cmd(qcmd
, 1); /* send read status command */
706 /* ignore return code -- should always be ok, STAT may contain
707 * exception flag from previous exception which we are trying to clear.
710 if (TP_DIAGS(current_tape_dev
))
711 printk(TPQIC02_NAME
": reading status bytes: ");
713 for (q
=stp
; q
<stp
+size
; q
++)
715 do s
= inb_p(QIC02_STAT_PORT
);
716 while ((s
& QIC02_STAT_MASK
) == QIC02_STAT_MASK
); /* wait for ready or exception */
718 if ((s
& QIC02_STAT_EXCEPTION
) == 0) { /* if exception */
719 tpqputs(TPQD_ALWAYS
, "rdstatus: exception error");
720 ioctl_status
.mt_erreg
= 0; /* dunno... */
721 return TE_NS
; /* error, shouldn't happen... */
724 *q
= inb_p(QIC02_DATA_PORT
); /* read status byte */
726 if (TP_DIAGS(current_tape_dev
))
727 printk("[%1d]=0x%x ", q
-stp
, (unsigned) (*q
) & 0xff);
729 outb_p(ctlbits
| QIC02_CTL_REQUEST
, QIC02_CTL_PORT
); /* set request */
731 while ((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_READY
) == 0); /* wait for not ready */
733 udelay(22); /* delay >20 usec */
735 outb_p(ctlbits
& ~QIC02_CTL_REQUEST
, QIC02_CTL_PORT
); /* un-set request */
739 /* Specs say we should wait for READY here.
740 * My drive doesn't seem to need it here yet, but others do?
742 while (inb_p(QIC02_STAT_PORT
) & QIC02_STAT_READY
)
743 /*skip*/; /* wait for ready */
745 if (TP_DIAGS(current_tape_dev
))
753 /* Get standard status (6 bytes).
754 * The `.dec' and `.urc' fields are in MSB-first byte-order,
755 * so they have to be swapped first.
757 static int get_status(volatile struct tpstatus
*stp
)
759 int stat
= rdstatus((char *) stp
, TPSTATSIZE
, QCMD_RD_STAT
);
760 #if defined(i386) || defined(i486)
761 byte_swap_w(&(stp
->dec
));
762 byte_swap_w(&(stp
->urc
));
764 /* should probably swap status bytes #definition */
771 /* This fails for my Wangtek drive */
772 /* get "Extended Status Register 3" (64 bytes)
774 * If the meaning of the returned bytes were known, the MT_TYPE
775 * identifier could be used to decode them, since they are
776 * "vendor unique". :-(
778 static int get_ext_status3(void)
780 char vus
[64]; /* vendor unique status */
783 tpqputs(TPQD_ALWAYS
, "Attempting to read Extended Status 3...");
784 stat
= rdstatus(vus
, sizeof(vus
), QCMD_RD_STAT_X3
);
788 tpqputs(TPQD_ALWAYS
, "Returned status bytes:");
789 for (i
=0; i
<sizeof(vus
); i
++) {
791 printk("\n" TPQIC02_NAME
": %2d:");
792 printk(" %2x", vus
[i
] & 0xff);
797 } /* get_ext_status3 */
801 /* Read drive status and set generic status too.
802 * NOTE: Once we do a tp_sense(), read/write transfers are killed.
804 static int tp_sense(int ignore
)
806 unsigned err
= 0, exnr
= 0, gs
= 0;
807 static void finish_rw(int cmd
);
809 if (TPQDBG(SENSE_TEXT
))
810 printk(TPQIC02_NAME
": tp_sense(ignore=0x%x) enter\n", ignore
);
812 /* sense() is not allowed during a read or write cycle */
813 if (doing_write
== YES
)
814 tpqputs(TPQD_ALWAYS
, "Warning: File Mark inserted because of sense() request");
815 /* The extra test is to avoid calling finish_rw during booting */
816 if ((doing_read
!=NO
) || (doing_write
!=NO
))
817 finish_rw(QCMD_RD_STAT
);
819 if (get_status(&tperror
) != TE_OK
) {
820 tpqputs(TPQD_ALWAYS
, "tp_sense: could not read tape drive status");
824 err
= tperror
.exs
; /* get exception status bits */
825 if (err
& (TP_ST0
|TP_ST1
))
826 printk(TPQIC02_NAME
": tp_sense: status: %x, error count: %d, underruns: %d\n",
827 tperror
.exs
, tperror
.dec
, tperror
.urc
);
828 else if ((tperror
.dec
!=0) || (tperror
.urc
!=0) || TPQDBG(SENSE_CNTS
))
829 printk(TPQIC02_NAME
": tp_sense: no hard errors, soft error count: %d, underruns: %d\n",
830 tperror
.dec
, tperror
.urc
);
832 /* Set generic status. HP-UX defines these, but some extra would
833 * be useful. Problem is to remain compatible. [Do we want to be
837 if (err
& TP_CNI
) /* no cartridge */
838 gs
|= GMT_DR_OPEN(-1);
839 if (status_dead
== NO
)
840 gs
|= GMT_ONLINE(-1); /* always online */
841 if (err
& TP_USL
) /* not online */
842 gs
&= ~GMT_ONLINE(-1);
844 gs
|= GMT_WR_PROT(-1);
845 if (err
& TP_EOM
) { /* end of media */
846 gs
|= GMT_EOT(-1); /* not sure this is correct for writes */
847 status_eom_detected
= YES
;
848 /* I don't know whether drive always reports EOF at or before EOM. */
849 status_eof_detected
= YES
;
851 /** if (err & TP_UDA) "Unrecoverable data error" **/
852 /** if (err & TP_BNL) "Bad block not located" **/
855 status_eof_detected
= YES
;
859 /** if (err & TP_ILL) "Illegal command" **/
860 /** if (err & TP_NDT) "No data detected" **/
861 /** if (err & TP_MBD) "Marginal block detected" **/
863 gs
|= GMT_BOT(-1); /* beginning of tape */
865 ioctl_status
.mt_gstat
= gs
;
866 ioctl_status
.mt_dsreg
= tperror
.exs
; /* "drive status" */
867 ioctl_status
.mt_erreg
= tperror
.dec
; /* "sense key error" */
869 if (err
& (TP_ST0
|TP_ST1
)) {
870 /* My Wangtek occasionally reports `status' 1212 which should be ignored. */
871 exnr
= decode_qic_exception_nr(err
);
872 handle_qic_exception(exnr
, err
); /* update driver state wrt drive status */
873 report_qic_exception(exnr
);
875 err
&= ~ignore
; /* mask unwanted errors -- not the correct way, use exception nrs?? */
876 if (((err
& TP_ST0
) && (err
& REPORT_ERR0
)) ||
877 ((err
& TP_ST1
) && (err
& REPORT_ERR1
)))
884 /* Wait for a wind or rewind operation to finish or
885 * to time-out. (May take very long).
887 static int wait_for_rewind(time_t timeout
)
891 stat
= inb(QIC02_STAT_PORT
) & QIC02_STAT_MASK
;
893 printk(TPQIC02_NAME
": Waiting for (re-)wind to finish: stat=0x%x\n", stat
);
895 stat
= wait_for_ready(timeout
);
898 tpqputs(TPQD_ALWAYS
, "(re-) winding failed\n");
901 } /* wait_for_rewind */
905 /* Perform a full QIC02 command, and wait for completion,
906 * check status when done. Complain about exceptions.
908 * This function should return an OS error code when
909 * something goes wrong, 0 otherwise.
911 static int ll_do_qic_cmd(int cmd
, time_t timeout
)
915 if (status_dead
== YES
) {
916 tpqputs(TPQD_ALWAYS
, "Drive is dead. Do a `mt reset`.");
917 return -ENXIO
; /* User should do an MTRESET. */
920 stat
= wait_for_ready(timeout
); /* wait for ready or exception */
922 if (tp_sense(TP_WRP
|TP_BOM
|TP_EOM
|TP_FIL
)!=TE_OK
)
924 /* else nothing to worry about, I hope */
928 printk(TPQIC02_NAME
": ll_do_qic_cmd(%x, %ld) failed\n", cmd
, (long) timeout
);
934 /* wait for ready since it may not be active immediately after reading status */
935 while ((inb_p(QIC02_STAT_PORT
) & QIC02_STAT_READY
) != 0);
938 stat
= send_qic02_cmd(cmd
, timeout
, 0); /* (checks for exceptions) */
940 if (cmd
==QCMD_RD_FM
) {
941 status_eof_detected
= NO
;
942 ioctl_status
.mt_fileno
++;
943 /* Should update block count as well, but can't.
944 * Can do a `read address' for some drives, when MTNOP is done.
946 } else if (cmd
==QCMD_WRT_FM
) {
947 status_eof_detected
= NO
;
948 ioctl_status
.mt_fileno
++;
949 } else if ((cmd
==QCMD_REWIND
) || (cmd
==QCMD_ERASE
) || (cmd
==QCMD_RETEN
)) {
950 status_eof_detected
= NO
;
951 status_eom_detected
= NO
;
952 status_eot_detected
= NO
;
954 ioctl_status
.mt_fileno
= ioctl_status
.mt_blkno
= 0;
955 extra_blocks_left
= BLOCKS_BEYOND_EW
;
956 return_write_eof
= NO
;
957 return_read_eof
= NO
;
958 reported_read_eof
= NO
;
959 reported_write_eof
= NO
;
961 /* sense() will set eof/eom as required */
963 if (tp_sense(TP_WRP
|TP_BOM
|TP_EOM
|TP_FIL
)!=TE_OK
) {
964 printk(TPQIC02_NAME
": Exception persist in ll_do_qic_cmd[1](%x, %ld)", cmd
, (long) timeout
);
967 /* if rdstatus fails too, we're in trouble */
970 else if (stat
!=TE_OK
) {
971 printk(TPQIC02_NAME
": ll_do_qic_cmd: send_qic02_cmd failed, stat = 0x%x\n", stat
);
972 return -EIO
; /*** -EIO is probably not always appropriate */
976 if (timeout
== TIM_R
)
977 stat
= wait_for_rewind(timeout
);
979 stat
= wait_for_ready(timeout
);
982 if (tp_sense((cmd
==QCMD_SEEK_EOD
? /*****************************/
983 TP_EOR
|TP_NDT
|TP_UDA
|TP_BNL
|TP_WRP
|TP_BOM
|TP_EOM
|TP_FIL
:
984 TP_WRP
|TP_BOM
|TP_EOM
|TP_FIL
))!=TE_OK
) {
985 printk(TPQIC02_NAME
": Exception persist in ll_do_qic_cmd[2](%x, %ld)\n", cmd
, (long) timeout
);
989 /* if rdstatus fails too, we're in trouble */
992 else if (stat
!=TE_OK
) {
993 printk(TPQIC02_NAME
": ll_do_qic_cmd %x: wait failed, stat == 0x%x\n", cmd
, stat
);
997 } /* ll_do_qic_cmd */
1001 * Problem: What to do when the user cancels a read/write operation
1004 * "Deactivating ONLINE during a READ also causes the"
1005 * "tape to be rewound to BOT." Ditto for WRITEs, except
1006 * a FM is written first. "The host may alternatively terminate
1007 * the READ/WRITE command by issuing a RFM/WFM command."
1010 * Neither option will leave the tape positioned where it was.
1011 * Another (better?) solution is to terminate the READ by two
1012 * subsequent sense() operations, the first to stop the current
1013 * READ cycle, the second to clear the `Illegal command' exception,
1014 * because the QIC-02 specs didn't anticipate this. This is
1015 * delayed until actually needed, so a tar listing can be aborted
1016 * by the user and continued later.
1017 * If anybody has a better solution, let me know! [Also, let me
1018 * know if your drive (mine is a Wangtek5150EQ) does not accept
1019 * this sequence for canceling the read-cycle.]
1021 * For WRITEs it's simple: Just do a WRITE_FM, leaving the tape
1022 * positioned after the FM.
1025 static void terminate_read(int cmd
)
1027 if (doing_read
== YES
) {
1029 if (cmd
!= QCMD_RD_FM
) {
1030 /* if the command is a RFM, there is no need to do this
1031 * because a RFM will legally terminate the read-cycle.
1033 tpqputs(TPQD_ALWAYS
, "terminating pending read-cycle");
1035 /* I'm not too sure about this part -- hhb */
1036 if (QIC02_TAPE_IFC
== MOUNTAIN
) {
1037 /* Mountain reference says can terminate by de-asserting online */
1038 ctlbits
&= ~MTN_QIC02_CTL_ONLINE
;
1041 if (tp_sense(TP_FIL
|TP_EOM
|TP_WRP
) != TE_OK
) {
1042 tpqputs(TPQD_ALWAYS
, "finish_rw[read1]: ignore the 2 lines above");
1043 if (is_exception()) {
1044 if (tp_sense(TP_ILL
|TP_FIL
|TP_EOM
|TP_WRP
) != TE_OK
)
1045 tpqputs(TPQD_ALWAYS
, "finish_rw[read2]: read cycle error");
1050 } /* terminate_read */
1053 static void terminate_write(int cmd
)
1057 if (doing_write
== YES
) {
1059 /* Finish writing by appending a FileMark at the end. */
1060 if (cmd
!= QCMD_WRT_FM
) {
1061 /* finish off write cycle */
1062 stat
= ll_do_qic_cmd(QCMD_WRT_FM
, TIM_M
);
1064 tpqputs(TPQD_ALWAYS
, "Couldn't finish write cycle properly");
1067 /* If there is an EOF token waiting to be returned to
1068 * the (writing) application, discard it now.
1069 * We could be at EOT, so don't reset return_write_eof.
1071 reported_write_eof
=YES
;
1073 } /* terminate_write */
1076 /* terminate read or write cycle because of command `cmd' */
1077 static void finish_rw(int cmd
)
1079 if (wait_for_ready(TIM_S
) != TE_OK
) {
1080 tpqputs(TPQD_ALWAYS
, "error: drive not ready in finish_rw() !");
1083 terminate_read(cmd
);
1084 terminate_write(cmd
);
1088 /* Perform a QIC command through ll_do_qic_cmd().
1089 * If necessary, rewind the tape first.
1090 * Return an OS error code if something goes wrong, 0 if all is well.
1092 static int do_qic_cmd(int cmd
, time_t timeout
)
1100 tpqputs(TPQD_REWIND
, "Rewinding tape...");
1101 stat
= ll_do_qic_cmd(QCMD_REWIND
, TIM_R
);
1103 printk(TPQIC02_NAME
": rewind failed in do_qic_cmd(). stat=0x%2x", stat
);
1107 if (cmd
==QCMD_REWIND
) /* don't wind beyond BOT ;-) */
1111 return ll_do_qic_cmd(cmd
, timeout
);
1115 /* Not all ioctls are supported for all drives. Some rely on
1116 * optional QIC-02 commands. Check tpqic02.h for configuration.
1117 * Some of these commands may require ONLINE to be active.
1119 static int do_ioctl_cmd(int cmd
)
1123 /* It is not permitted to read or wind the tape after bytes have
1124 * been written. It is not permitted to write the tape while in
1126 * We try to be kind and allow reading again after writing a FM...
1132 return (tape_reset(1)==TE_OK
)? 0 : -EIO
;
1135 tpqputs(TPQD_IOCTLS
, "MTFSF forward searching filemark");
1136 if ((mode_access
==WRITE
) && status_bytes_wr
)
1138 return do_qic_cmd(QCMD_RD_FM
, TIM_F
);
1142 tpqputs(TPQD_IOCTLS
, "MTBSF backward searching filemark -- optional command");
1143 if ((mode_access
==WRITE
) && status_bytes_wr
)
1145 stat
= do_qic_cmd(QCMD_RD_FM_BCK
, TIM_F
);
1149 status_eom_detected
= status_eof_detected
= NO
;
1153 if (TP_HAVE_FSR
) { /* This is an optional QIC-02 command */
1154 tpqputs(TPQD_IOCTLS
, "MTFSR forward space record");
1155 if ((mode_access
==WRITE
) && status_bytes_wr
)
1157 stat
= do_qic_cmd(QCMD_SPACE_FWD
, TIM_F
);
1159 /**** fake it by doing a read data block command? ******/
1160 tpqputs(TPQD_IOCTLS
, "MTFSR not supported");
1166 if (TP_HAVE_BSR
) { /* This is an optional QIC-02 command */
1167 /* we need this for appending files with GNU tar!! */
1168 tpqputs(TPQD_IOCTLS
, "MTFSR backward space record");
1169 if ((mode_access
==WRITE
) && status_bytes_wr
)
1171 stat
= do_qic_cmd(QCMD_SPACE_BCK
, TIM_F
);
1173 tpqputs(TPQD_IOCTLS
, "MTBSR not supported");
1176 status_eom_detected
= status_eof_detected
= NO
;
1180 tpqputs(TPQD_IOCTLS
, "MTWEOF write eof mark");
1181 /* Plain GNU mt(1) 2.2 uses read-only mode for writing FM. :-( */
1182 if (mode_access
==READ
)
1185 /* allow tape movement after writing FM */
1186 status_bytes_rd
= status_bytes_wr
; /* Kludge-O-Matic */
1187 status_bytes_wr
= NO
;
1188 return do_qic_cmd(QCMD_WRT_FM
, TIM_M
);
1189 /* not sure what to do with status_bytes when WFM should fail */
1192 tpqputs(TPQD_IOCTLS
, "MTREW rewinding tape");
1193 if ((mode_access
==WRITE
) && status_bytes_wr
)
1195 status_eom_detected
= status_eof_detected
= NO
;
1196 return do_qic_cmd(QCMD_REWIND
, TIM_R
);
1199 tpqputs(TPQD_IOCTLS
, "MTOFFL rewinding & going offline");
1200 /* Doing a drive select will clear (unlock) the current drive.
1201 * But that requires support for multiple drives and locking.
1203 if ((mode_access
==WRITE
) && status_bytes_wr
)
1205 status_eom_detected
= status_eof_detected
= NO
;
1206 /**** do rewind depending on minor bits??? ***/
1207 stat
= do_qic_cmd(QCMD_REWIND
, TIM_R
);
1211 tpqputs(TPQD_IOCTLS
, "MTNOP setting status only");
1212 /********** should do `read position' for drives that support it **********/
1213 return (tp_sense(-1)==TE_OK
)? 0 : -EIO
; /**** check return codes ****/
1216 tpqputs(TPQD_IOCTLS
, "MTRETEN retension tape");
1217 if ((mode_access
==WRITE
) && status_bytes_wr
)
1219 status_eom_detected
= status_eof_detected
= NO
;
1220 return do_qic_cmd(QCMD_RETEN
, TIM_R
);
1223 /* Think think is like MTBSF, except that
1224 * we shouldn't skip the FM. Tricky.
1225 * Maybe use RD_FM_BCK, then do a SPACE_FWD?
1227 tpqputs(TPQD_IOCTLS
, "MTBSFM not supported");
1228 if ((mode_access
==WRITE
) && status_bytes_wr
)
1233 /* I think this is like MTFSF, except that
1234 * we shouldn't skip the FM. Tricky.
1235 * Maybe use QCMD_RD_DATA until we get a TP_FIL exception?
1236 * But then the FM will have been skipped...
1237 * Maybe use RD_FM, then RD_FM_BCK, but not all
1238 * drives will support that!
1240 tpqputs(TPQD_IOCTLS
, "MTFSFM not supported");
1241 if ((mode_access
==WRITE
) && status_bytes_wr
)
1246 /* This should leave the tape ready for appending
1247 * another file to the end, such that it would append
1248 * after the last FM on tape.
1250 tpqputs(TPQD_IOCTLS
, "MTEOM search for End Of recorded Media");
1251 if ((mode_access
==WRITE
) && status_bytes_wr
)
1254 /* Use faster seeking when possible.
1255 * This requires the absence of data beyond the EOM.
1256 * It seems that my drive does not always perform the
1257 * SEEK_EOD correctly, unless it is preceded by a
1261 status_eom_detected
= status_eof_detected
= NO
;
1263 stat
= do_qic_cmd(QCMD_REWIND
, TIM_R
);
1266 stat
= do_qic_cmd(QCMD_SEEK_EOD
, TIM_F
);
1267 /* After a successful seek, TP_EOR should be returned */
1269 /* else just seek until the drive returns exception "No Data" */
1271 while ((stat
==0) && (!status_eom_detected
)) {
1272 stat
= do_qic_cmd(QCMD_RD_FM
, TIM_F
); /***** should use MTFSFM here???? ******/
1274 if (tperror
.exs
& TP_NDT
)
1280 tpqputs(TPQD_IOCTLS
, "MTERASE -- ERASE TAPE !");
1281 if ((tperror
.exs
& TP_ST0
) && (tperror
.exs
& TP_WRP
)) {
1282 tpqputs(TPQD_ALWAYS
, "Cartridge is write-protected.");
1287 /* Plain GNU mt(1) 2.2 erases a tape in O_RDONLY. :-( */
1288 if (mode_access
==READ
)
1291 /* give user a few seconds to pull out tape */
1292 while (jiffies
- t
< 4*HZ
)
1296 /* don't bother writing filemark first */
1297 status_eom_detected
= status_eof_detected
= NO
;
1298 return do_qic_cmd(QCMD_ERASE
, TIM_R
);
1302 tpqputs(TPQD_IOCTLS
, "MTRAS1: non-destructive self test");
1303 stat
= do_qic_cmd(QCMD_SELF_TST1
, TIM_R
);
1305 tpqputs(TPQD_ALWAYS
, "RAS1 failed");
1308 return (tp_sense(0)==TE_OK
)? 0 : -EIO
; /* get_ext_status3(); */
1310 tpqputs(TPQD_IOCTLS
, "RAS1 not supported");
1315 tpqputs(TPQD_IOCTLS
, "MTRAS2: destructive self test");
1316 stat
= do_qic_cmd(QCMD_SELF_TST2
, TIM_R
);
1318 tpqputs(TPQD_ALWAYS
, "RAS2 failed");
1321 return (tp_sense(0)==TE_OK
)? 0 : -EIO
; /* get_ext_status3(); */
1323 tpqputs(TPQD_IOCTLS
, "RAS2 not supported");
1327 if (TP_HAVE_SEEK
&& (QIC02_TAPE_IFC
==ARCHIVE
)) {
1328 tpqputs(TPQD_IOCTLS
, "MTSEEK seeking block");
1329 if ((mode_access
==WRITE
) && status_bytes_wr
)
1331 /* NOTE: address (24 bits) is in seek_addr_buf[] */
1332 return do_qic_cmd(AR_QCMDV_SEEK_BLK
, TIM_F
);
1340 } /* do_ioctl_cmd */
1343 /* dma_transfer(): This routine is called for every 512 bytes to be read
1344 * from/written to the tape controller. Speed is important here!
1345 * (There must be enough time left for the hd controller!)
1346 * When other devices use DMA they must ensure they use un-interruptible
1347 * double byte accesses to the DMA controller. Floppy.c is ok.
1348 * Must have interrupts disabled when this function is invoked,
1349 * otherwise, the double-byte transfers to the DMA controller will not
1350 * be atomic. That could lead to nasty problems when they are interrupted
1351 * by other DMA interrupt-routines.
1353 * This routine merely does the least possible to keep
1354 * the transfers going:
1355 * - set the DMA count register for the next 512 bytes
1356 * - adjust the DMA address and page registers
1357 * - adjust the timeout
1358 * - tell the tape controller to start transferring
1359 * We assume the dma address and mode are, and remain, valid.
1361 static inline void dma_transfer(void)
1364 if (QIC02_TAPE_IFC
== WANGTEK
) /* or EVEREX */
1365 outb_p(WT_CTL_ONLINE
, QIC02_CTL_PORT
); /* back to normal */
1366 else if (QIC02_TAPE_IFC
== ARCHIVE
)
1367 outb_p(0, AR_RESET_DMA_PORT
);
1368 else /* QIC02_TAPE_IFC == MOUNTAIN */
1369 outb_p(ctlbits
, QIC02_CTL_PORT
);
1372 clear_dma_ff(QIC02_TAPE_DMA
);
1373 set_dma_mode(QIC02_TAPE_DMA
, dma_mode
);
1374 set_dma_addr(QIC02_TAPE_DMA
, buffaddr
+dma_bytes_done
); /* full address */
1375 set_dma_count(QIC02_TAPE_DMA
, TAPE_BLKSIZE
);
1377 /* start tape DMA controller */
1378 if (QIC02_TAPE_IFC
== WANGTEK
) /* or EVEREX */
1379 outb_p(WT_CTL_DMA
| WT_CTL_ONLINE
, QIC02_CTL_PORT
); /* trigger DMA transfer */
1381 else if (QIC02_TAPE_IFC
== ARCHIVE
) {
1382 outb_p(AR_CTL_IEN
| AR_CTL_DNIEN
, QIC02_CTL_PORT
); /* enable interrupts again */
1383 outb_p(0, AR_START_DMA_PORT
); /* start DMA transfer */
1384 /* In dma_end() AR_RESET_DMA_PORT is written too. */
1386 } else /* QIC02_TAPE_IFC == MOUNTAIN */ {
1387 inb(MTN_R_DESELECT_DMA_PORT
);
1388 outb_p(ctlbits
| (MTN_CTL_EXC_IEN
| MTN_CTL_DNIEN
), QIC02_CTL_PORT
);
1389 outb_p(0, MTN_W_SELECT_DMA_PORT
); /* start DMA transfer */
1390 if (dma_mode
== DMA_MODE_WRITE
)
1391 outb_p(0, MTN_W_DMA_WRITE_PORT
); /* start DMA transfer */
1394 /* start computer DMA controller */
1395 enable_dma(QIC02_TAPE_DMA
);
1396 /* block transfer should start now, jumping to the
1397 * interrupt routine when done or an exception was detected.
1399 } /* dma_transfer */
1402 /* start_dma() sets a DMA transfer up between the tape controller and
1403 * the kernel qic02_tape_buf buffer.
1404 * Normally bytes_todo==dma_bytes_done at the end of a DMA transfer. If not,
1405 * a filemark was read, or an attempt to write beyond the End Of Tape
1406 * was made. [Or some other bad thing happened.]
1407 * Must do a sense() before returning error.
1409 static int start_dma(short mode
, unsigned long bytes_todo
)
1410 /* assume 'bytes_todo'>0 */
1414 tpqputs(TPQD_DEBUG
, "start_dma() enter");
1415 TPQDEB({printk(TPQIC02_NAME
": doing_read==%d, doing_write==%d\n", doing_read
, doing_write
);})
1418 dma_bytes_todo
= bytes_todo
;
1420 /* dma_mode!=0 indicates that the dma controller is in use */
1421 dma_mode
= (mode
== WRITE
)? DMA_MODE_WRITE
: DMA_MODE_READ
;
1423 /* Only give READ/WRITE DATA command to tape drive if we haven't
1424 * done that already. Otherwise the drive will rewind to the beginning
1425 * of the current file on tape. Any QIC command given other than
1426 * R/W FM will break the read/write transfer cycle.
1427 * do_qic_cmd() will terminate doing_{read,write}
1429 if ((doing_read
== NO
) && (doing_write
== NO
)) {
1430 /* First, we have to clear the status -- maybe remove TP_FIL???
1434 /* Next dummy get status is to make sure CNI is valid,
1435 since we're only just starting a read/write it doesn't
1436 matter some exceptions are cleared by reading the status;
1437 we're only interested in CNI and WRP. -Eddy */
1438 get_status(&tperror
);
1440 /* TP_CNI should now be handled in open(). -Hennus */
1443 stat
= tp_sense(((mode
== WRITE
)? 0 : TP_WRP
) | TP_BOM
| TP_FIL
);
1448 /************* not needed iff rd_status() would wait for ready!!!!!! **********/
1449 if (wait_for_ready(TIM_S
) != TE_OK
) { /*** not sure this is needed ***/
1450 tpqputs(TPQD_ALWAYS
, "wait_for_ready failed in start_dma");
1455 if (QIC02_TAPE_IFC
== MOUNTAIN
) {
1456 /* Set control bits to select ONLINE during command */
1457 ctlbits
|= MTN_QIC02_CTL_ONLINE
;
1460 /* Tell the controller the data direction */
1462 /* r/w, timeout medium, check exceptions, sets status_cmd_pending. */
1463 stat
= send_qic02_cmd((mode
== WRITE
)? QCMD_WRT_DATA
: QCMD_RD_DATA
, TIM_M
, 0);
1465 printk(TPQIC02_NAME
": start_dma: init %s failed\n",
1466 (mode
== WRITE
)? "write" : "read");
1471 /* Do this last, because sense() will clear the doing_{read,write}
1472 * flags, causing trouble next time around.
1474 if (wait_for_ready(TIM_M
) != TE_OK
)
1484 printk(TPQIC02_NAME
": requested unknown mode %d\n", mode
);
1485 panic(TPQIC02_NAME
": invalid mode in start_dma()");
1488 } else if (is_exception()) {
1489 /* This is for Archive drives, to handle reads with 0 bytes
1490 * left for the last read request.
1492 * ******** this also affects EOF/EOT handling! ************
1494 tpqputs(TPQD_ALWAYS
, "detected exception in start_dma() while transfer in progress");
1500 status_expect_int
= YES
;
1502 /* This assumes tape is already positioned, but these
1503 * semi-'intelligent' drives are unpredictable...
1507 /* initiate first data block read from/write to the tape controller */
1513 TPQPUTS("start_dma() end");
1518 /* This cleans up after the dma transfer has completed
1519 * (or failed). If an exception occurred, a sense()
1520 * must be done. If the exception was caused by a FM,
1521 * sense() will set `status_eof_detected' and
1522 * `status_eom_detected', as required.
1524 static void end_dma(unsigned long * bytes_done
)
1530 TPQPUTS("end_dma() enter");
1532 disable_dma(QIC02_TAPE_DMA
);
1533 clear_dma_ff(QIC02_TAPE_DMA
);
1535 if (QIC02_TAPE_IFC
== WANGTEK
) /* or EVEREX */
1536 outb_p(WT_CTL_ONLINE
, QIC02_CTL_PORT
); /* back to normal */
1537 else if (QIC02_TAPE_IFC
== ARCHIVE
)
1538 outb_p(0, AR_RESET_DMA_PORT
);
1539 else /* QIC02_TAPE_IFC == MOUNTAIN */ {
1540 /* Clear control bits, de-select ONLINE during tp_sense */
1541 ctlbits
&= ~MTN_QIC02_CTL_ONLINE
;
1544 stat
= wait_for_ready(TIM_M
);
1545 if (status_error
|| (stat
!=TE_OK
)) {
1546 tpqputs(TPQD_DMAX
, "DMA transfer exception");
1547 stat
= tp_sense((dma_mode
==READ
)? TP_WRP
: 0);
1548 /* no return here -- got to clean up first! */
1549 } else /* if (QIC02_TAPE_IFC == MOUNTAIN) */ {
1550 outb_p(ctlbits
, QIC02_CTL_PORT
);
1553 if (QIC02_TAPE_IFC
== MOUNTAIN
)
1554 inb(MTN_R_DESELECT_DMA_PORT
);
1556 /* take the tape controller offline */
1558 /* finish off DMA stuff */
1562 /* Note: The drive is left on-line, ready for the next
1564 * If the next command to the drive does not continue
1565 * the pending cycle, it must do 2 sense()s first.
1568 *bytes_done
= dma_bytes_done
;
1569 status_expect_int
= NO
;
1570 ioctl_status
.mt_blkno
+= (dma_bytes_done
/ TAPE_BLKSIZE
);
1572 TPQPUTS("end_dma() exit");
1573 /*** could return stat here ***/
1576 /*********** Below are the (public) OS-interface procedures ***********/
1579 /* qic02_tape_times_out() is called when a DMA transfer doesn't complete
1580 * quickly enough. Usually this means there is something seriously wrong
1581 * with the hardware/software, but it could just be that the controller
1582 * has decided to do a long rewind, just when I didn't expect it.
1585 static void qic02_tape_times_out(void)
1587 printk("time-out in %s driver\n", TPQIC02_NAME
);
1588 if ((status_cmd_pending
>0) || dma_mode
) {
1589 /* takes tooo long, shut it down */
1591 status_cmd_pending
= 0;
1592 status_timer_on
= NO
;
1593 status_expect_int
= NO
;
1596 dma_mode
= 0; /* signal end to read/write routine */
1597 wake_up(&qic02_tape_transfer
);
1600 } /* qic02_tape_times_out */
1603 * Interrupt handling:
1605 * 1) Interrupt is generated iff at the end of
1606 * a 512-DMA-block transfer.
1607 * 2) EXCEPTION is not raised unless something
1608 * is wrong or EOT/FM is detected.
1609 * 3) FM EXCEPTION is set *after* the last byte has
1610 * been transferred by DMA. By the time the interrupt
1611 * is handled, the EXCEPTION may already be set.
1614 * 1) On EXCEPTION, assume data has been transferred, so
1615 * continue as usual, but set a flag to indicate the
1616 * exception was detected.
1617 * Do a sense status when the flag is found set.
1618 * 2) Do not attempt to continue a transfer after an exception.
1619 * [??? What about marginal blocks???????]
1623 /* qic02_tape_interrupt() is called when the tape controller completes
1625 * We are not allowed to sleep here!
1627 * Check if the transfer was successful, check if we need to transfer
1628 * more. If the buffer contains enough data/is empty enough, signal the
1629 * read/write() thread to copy to/from user space.
1630 * When we are finished, set flags to indicate end, disable timer.
1631 * NOTE: This *must* be fast!
1633 static void qic02_tape_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
1639 if (status_expect_int
) {
1640 #ifdef WANT_EXTRA_FULL_DEBUGGING
1641 if (TP_DIAGS(current_tape_dev
))
1644 stat
= inb(QIC02_STAT_PORT
); /* Knock, knock */
1645 if (QIC02_TAPE_IFC
== ARCHIVE
) { /* "Who's there?" */
1646 if (((stat
& (AR_STAT_DMADONE
)) == 0) &&
1647 ((stat
& (QIC02_STAT_EXCEPTION
)) != 0)) {
1649 return; /* "Linux with IRQ sharing" */
1653 if ((stat
& QIC02_STAT_EXCEPTION
) == 0) { /* exception occurred */
1654 /* Possible causes for an exception during a transfer:
1655 * - during a write-cycle: end of tape (EW) hole detected.
1656 * - during a read-cycle: filemark or EOD detected.
1657 * - something went wrong
1658 * So don't continue with the next block.
1660 tpqputs(TPQD_ALWAYS
, "isr: exception on tape controller");
1661 printk(" status %02x\n", stat
);
1662 status_error
= TE_EX
;
1664 dma_bytes_done
+= TAPE_BLKSIZE
;
1666 dma_mode
= 0; /* wake up rw() */
1667 status_expect_int
= NO
;
1668 wake_up(&qic02_tape_transfer
);
1671 /* return if tape controller not ready, or
1672 * if dma channel hasn't finished last byte yet.
1676 /* Skip next ready check for Archive controller because
1677 * it may be busy reading ahead. Weird. --hhb
1679 if (QIC02_TAPE_IFC
== WANGTEK
) /* I think this is a drive-dependency, not IFC -- hhb */
1680 if (stat
& QIC02_STAT_READY
) { /* not ready */
1681 tpqputs(TPQD_ALWAYS
, "isr: ? Tape controller not ready");
1685 if ( (i
= get_dma_residue(QIC02_TAPE_DMA
)) != 0 ) {
1686 printk(TPQIC02_NAME
": dma_residue == %x !!!\n", i
);
1687 r
= 1; /* big trouble, but can't do much about it... */
1693 /* finish DMA cycle */
1695 /* no errors detected, continue */
1696 dma_bytes_done
+= TAPE_BLKSIZE
;
1697 if (dma_bytes_done
>= dma_bytes_todo
) {
1698 /* finished! Wakeup rw() */
1700 status_expect_int
= NO
;
1701 TPQPUTS("isr: dma_bytes_done");
1702 wake_up(&qic02_tape_transfer
);
1704 /* start next transfer, account for track-switching time */
1705 timer_table
[QIC02_TAPE_TIMER
].expires
= jiffies
+ 6*HZ
;
1709 printk(TPQIC02_NAME
": Unexpected interrupt, stat == %x\n",
1710 inb(QIC02_STAT_PORT
));
1712 } /* qic02_tape_interrupt */
1715 static long long qic02_tape_lseek(struct file
* file
, long long offset
, int origin
)
1717 return -EINVAL
; /* not supported */
1718 } /* qic02_tape_lseek */
1721 /* read/write routines:
1722 * This code copies between a kernel buffer and a user buffer. The
1723 * actual data transfer is done using DMA and interrupts. Time-outs
1726 * When a filemark is read, we return '0 bytes read' and continue with the
1727 * next file after that.
1728 * When EOM is read, we return '0 bytes read' twice.
1729 * When the EOT marker is detected on writes, '0 bytes read' should be
1730 * returned twice. If user program does a MTNOP after that, 2 additional
1731 * blocks may be written. ------- FIXME: Implement this correctly *************************************************
1733 * Only read/writes in multiples of 512 bytes are accepted.
1734 * When no bytes are available, we sleep() until they are. The controller will
1735 * generate an interrupt, and we (should) get a wake_up() call.
1737 * Simple buffering is used. User program should ensure that a large enough
1738 * buffer is used. Usually the drive does some buffering as well (something
1741 * Scott S. Bertilson suggested to continue filling the user buffer, rather
1742 * than waste time on a context switch, when the kernel buffer fills up.
1746 * Problem: tar(1) doesn't always read the entire file. Sometimes the entire file
1747 * has been read, but the EOF token is never returned to tar(1), simply because
1748 * tar(1) knows it has already read all of the data it needs. So we must use
1749 * open/release to reset the `reported_read_eof' flag. If we don't, the next read
1750 * request would return the EOF flag for the previous file.
1753 static ssize_t
qic02_tape_read(struct file
* filp
, char * buf
, size_t count
, loff_t
*ppos
)
1756 kdev_t dev
= filp
->f_dentry
->d_inode
->i_rdev
;
1757 unsigned short flags
= filp
->f_flags
;
1758 unsigned long bytes_todo
, bytes_done
, total_bytes_done
= 0;
1761 if (status_zombie
==YES
)
1763 tpqputs(TPQD_ALWAYS
, "configs not set");
1767 if (TP_DIAGS(current_tape_dev
))
1768 /* can't print a ``long long'' (for filp->f_pos), so chop it */
1769 printk(TPQIC02_NAME
": request READ, minor=%x, buf=%p, count=%lx"
1770 ", pos=%lx, flags=%x\n",
1771 MINOR(dev
), buf
, (long) count
,
1772 (unsigned long) filp
->f_pos
, flags
);
1774 if (count
% TAPE_BLKSIZE
) /* Only allow mod 512 bytes at a time. */
1776 tpqputs(TPQD_BLKSZ
, "Wrong block size");
1780 /* Just assume everything is ok. Controller will scream if not. */
1782 if (status_bytes_wr
) /* Once written, no more reads, 'till after WFM. */
1787 /* This is rather ugly because it has to implement a finite state
1788 * machine in order to handle the EOF situations properly.
1790 while ((signed)count
>=0)
1793 /* see how much fits in the kernel buffer */
1794 bytes_todo
= TPQBUF_SIZE
;
1795 if (bytes_todo
>count
)
1800 /* Must ensure that user program sees exactly one EOF token (==0) */
1801 if (return_read_eof
==YES
)
1805 printk("read: return_read_eof==%d, reported_read_eof==%d, total_bytes_done==%lu\n", return_read_eof
, reported_read_eof
, total_bytes_done
);
1808 if (reported_read_eof
==NO
)
1810 /* have not yet returned EOF to user program */
1811 if (total_bytes_done
>0)
1813 return total_bytes_done
; /* next time return EOF */
1817 reported_read_eof
= YES
; /* move on next time */
1818 return 0; /* return EOF */
1823 /* Application program has already received EOF
1824 * (above), now continue with next file on tape,
1826 * When the FM is reached, EXCEPTION is set,
1827 * causing a sense(). Subsequent read/writes will
1828 * continue after the FM.
1830 /*********** ?????????? this should check for (EOD|NDT), not EOM, 'cause we can read past EW: ************/
1831 if (status_eom_detected
)
1833 /* If EOM, nothing left to read, so keep returning EOFs.
1834 *** should probably set some flag to avoid clearing
1835 *** status_eom_detected through ioctls or something
1841 /* just eof, there may be more files ahead... */
1842 return_read_eof
= NO
;
1843 reported_read_eof
= NO
;
1844 status_eof_detected
= NO
; /* reset this too */
1850 /*****************************/
1853 return total_bytes_done
;
1858 /* start reading data */
1859 if (is_exception()) /****************************************/
1861 tpqputs(TPQD_DMAX
, "is_exception() before start_dma()!");
1864 /******************************************************************
1865 ***** if start_dma() fails because the head is positioned 0 bytes
1866 ***** before the FM, (causing EXCEPTION to be set) return_read_eof should
1867 ***** be set to YES, and we should return total_bytes_done, rather than -ENXIO.
1868 ***** The app should recognize this as an EOF condition.
1869 ***************************************************************************/
1870 stat
= start_dma(READ
, bytes_todo
);
1873 /* Wait for transfer to complete, interrupt should wake us */
1874 while (dma_mode
!= 0)
1876 sleep_on(&qic02_tape_transfer
);
1880 return_read_eof
= YES
;
1884 else if (stat
!= TE_END
)
1886 /* should do sense() on error here */
1890 printk("Trouble: stat==%02x\n", stat
);
1891 return_read_eof
= YES
;
1892 /*************** check EOF/EOT handling!!!!!! **/
1895 end_dma(&bytes_done
);
1896 if (bytes_done
>bytes_todo
)
1898 tpqputs(TPQD_ALWAYS
, "read: Oops, read more bytes than requested");
1901 /* copy buffer to user-space in one go */
1904 err
= copy_to_user( (void *) buf
, (void *) bus_to_virt(buffaddr
), bytes_done
);
1911 /* Checks Ton's patch below */
1912 if ((return_read_eof
== NO
) && (status_eof_detected
== YES
))
1914 printk(TPQIC02_NAME
": read(): return_read_eof=%d, status_eof_detected=YES. return_read_eof:=YES\n", return_read_eof
);
1917 if ((bytes_todo
!= bytes_done
) || (status_eof_detected
== YES
))
1919 /* EOF or EOM detected. return EOF next time. */
1920 return_read_eof
= YES
;
1923 } /* else: ignore read request for 0 bytes */
1927 status_bytes_rd
= YES
;
1929 *ppos
+= bytes_done
;
1930 total_bytes_done
+= bytes_done
;
1931 count
-= bytes_done
;
1934 tpqputs(TPQD_ALWAYS
, "read request for <0 bytes");
1936 } /* qic02_tape_read */
1940 /* The drive detects near-EOT by means of the holes in the tape.
1941 * When the holes are detected, there is some space left. The drive
1942 * reports this as a TP_EOM exception. After clearing the exception,
1943 * the drive should accept two extra blocks.
1945 * It seems there are some archiver programs that would like to use the
1946 * extra space for writing a continuation marker. The driver should return
1947 * end-of-file to the user program on writes, when the holes are detected.
1948 * If the user-program wants to use the extra space, it should use the
1949 * MTNOP ioctl() to get the generic status register and may then continue
1950 * writing (max 1kB). ----------- doesn't work yet...............
1952 * EOF behaviour on writes:
1953 * If there is enough room, write all of the data.
1954 * If there is insufficient room, write as much as will fit and
1955 * return the amount written. If the requested amount differs from the
1956 * written amount, the application program should recognize that as the
1957 * end of file. Subsequent writes will return -ENOSPC.
1958 * Unless the minor bits specify a rewind-on-close, the tape will not
1959 * be rewound when it is full. The user-program should do that, if desired.
1960 * If the driver were to do that automatically, a user-program could be
1961 * confused about the EOT/BOT condition after re-opening the tape device.
1963 * Multiple volume support: Tar closes the tape device before prompting for
1964 * the next tape. The user may then insert a new tape and tar will open the
1965 * tape device again. The driver will detect an exception status in (No Cartridge)
1966 * and force a rewind. After that tar may continue writing.
1968 static ssize_t
qic02_tape_write( struct file
* filp
, const char * buf
,
1969 size_t count
, loff_t
*ppos
)
1972 kdev_t dev
= filp
->f_dentry
->d_inode
->i_rdev
;
1973 unsigned short flags
= filp
->f_flags
;
1974 unsigned long bytes_todo
, bytes_done
, total_bytes_done
= 0;
1976 if (status_zombie
==YES
)
1978 tpqputs(TPQD_ALWAYS
, "configs not set");
1982 if (TP_DIAGS(current_tape_dev
))
1984 /* can't print a ``long long'' (for filp->f_pos), so chop it */
1985 printk(TPQIC02_NAME
": request WRITE, minor=%x, buf=%p"
1986 ", count=%lx, pos=%lx, flags=%x\n",
1988 (long) count
, (unsigned long) filp
->f_pos
, flags
);
1991 if (count
% TAPE_BLKSIZE
) /* only allow mod 512 bytes at a time */
1993 tpqputs(TPQD_BLKSZ
, "Wrong block size");
1997 if (mode_access
==READ
)
1999 tpqputs(TPQD_ALWAYS
, "Not in write mode");
2003 /* open() does a sense() and we can assume the tape isn't changed
2004 * between open() and release(), so the tperror.exs bits will still
2007 if ((tperror
.exs
& TP_ST0
) && (tperror
.exs
& TP_WRP
))
2009 tpqputs(TPQD_ALWAYS
, "Cartridge is write-protected.");
2010 return -EACCES
; /* don't even try when write protected */
2013 if (doing_read
== YES
)
2018 while ((signed)count
>=0)
2020 /* see how much fits in the kernel buffer */
2022 bytes_todo
= TPQBUF_SIZE
;
2023 if (bytes_todo
>count
)
2028 if (return_write_eof
== YES
)
2030 /* return_write_eof should be reset on reverse tape movements. */
2032 if (reported_write_eof
==NO
)
2036 tpqputs(TPQD_ALWAYS
, "partial write");
2037 /* partial write signals EOF to user program */
2039 reported_write_eof
= YES
;
2040 return total_bytes_done
;
2044 return -ENOSPC
; /* return error */
2048 /* Quit when done. */
2051 return total_bytes_done
;
2054 /* copy from user to DMA buffer and initiate transfer. */
2057 err
= copy_from_user( (void *) bus_to_virt(buffaddr
), (const void *) buf
, bytes_todo
);
2063 /****************** similar problem with read() at FM could happen here at EOT.
2066 /***** if at EOT, 0 bytes can be written. start_dma() will
2067 ***** fail and write() will return ENXIO error
2069 if (start_dma(WRITE
, bytes_todo
) != TE_OK
)
2071 tpqputs(TPQD_ALWAYS
, "write: start_dma() failed");
2072 /* should do sense() on error here */
2073 return -ENXIO
; /*********** FIXTHIS **************/
2076 /* Wait for write to complete, interrupt should wake us. */
2077 while ((status_error
== 0) && (dma_mode
!= 0))
2079 sleep_on(&qic02_tape_transfer
);
2082 end_dma(&bytes_done
);
2083 if (bytes_done
>bytes_todo
)
2085 tpqputs(TPQD_ALWAYS
, "write: Oops, wrote more bytes than requested");
2088 /* If the dma-transfer was aborted because of an exception,
2089 * status_error will have been set in the interrupt handler.
2090 * Then end_dma() will do a sense().
2091 * If the exception was EXC_EOM, the EW-hole was encountered
2092 * and two more blocks could be written. For the time being we'll
2093 * just consider this to be the EOT.
2094 * Otherwise, something Bad happened, such as the maximum number
2095 * of block-rewrites was exceeded. [e.g. A very bad spot on tape was
2096 * encountered. Normally short dropouts are compensated for by
2097 * rewriting the block in error, up to 16 times. I'm not sure
2098 * QIC-24 drives can do this.]
2102 if (status_eom_detected
== YES
)
2104 tpqputs(TPQD_ALWAYS
, "write: EW detected");
2105 return_write_eof
= YES
;
2109 /* probably EXC_RWA */
2110 tpqputs(TPQD_ALWAYS
, "write: dma: error in writing");
2114 if (bytes_todo
!= bytes_done
)
2116 /* EOF or EOM detected. return EOT next time. */
2117 return_write_eof
= YES
;
2120 /* else: ignore write request for 0 bytes. */
2124 status_bytes_wr
= YES
;
2126 *ppos
+= bytes_done
;
2127 total_bytes_done
+= bytes_done
;
2128 count
-= bytes_done
;
2132 tpqputs(TPQD_ALWAYS
, "write request for <0 bytes");
2135 printk(TPQIC02_NAME
": status_bytes_wr %x, buf %p"
2136 ", total_bytes_done %lx, count %lx\n",
2137 status_bytes_wr
, buf
, total_bytes_done
, (long) count
);
2140 } /* qic02_tape_write */
2144 /* qic02_tape_open()
2145 * We allow the device to be opened, even if it is marked 'dead' because
2146 * we want to be able to reset the tape device without rebooting.
2147 * Only one open tape file at a time, except when minor=255.
2148 * Minor 255 is only allowed for resetting and always returns <0.
2150 * The density command is only allowed when TP_BOM is set. Thus, remember
2151 * the most recently used minor bits. When they are different from the
2152 * remembered values, rewind the tape and set the required density.
2153 * Don't rewind if the minor bits specify density 0.
2156 static int qic02_tape_open(struct inode
* inode
, struct file
* filp
)
2158 static int qic02_tape_open_no_use_count(struct inode
*, struct file
*);
2161 open_error
= qic02_tape_open_no_use_count(inode
, filp
);
2169 static int qic02_tape_open_no_use_count(struct inode
* inode
, struct file
* filp
)
2171 kdev_t dev
= inode
->i_rdev
;
2172 unsigned short flags
= filp
->f_flags
;
2173 unsigned short dens
= 0;
2179 printk("qic02_tape_open: dev=%s, flags=%x ",
2180 kdevname(dev
), flags
);
2183 if (MINOR(dev
)==255) /* special case for resetting */
2187 return (tape_reset(1)==TE_OK
) ? -EAGAIN
: -ENXIO
;
2195 if (status_dead
==YES
)
2197 /* Allow `mt reset' ioctl() even when already open()ed. */
2201 /* Only one at a time from here on... */
2202 if (filp
->f_count
>1) /* filp->f_count==1 for the first open() */
2207 if (status_zombie
==YES
)
2209 /* no irq/dma/port stuff allocated yet, no reset done
2210 * yet, so return until MTSETCONFIG has been done.
2215 status_bytes_rd
= NO
;
2216 status_bytes_wr
= NO
;
2218 return_read_eof
= NO
; /********????????????????*****/
2219 return_write_eof
= (status_eot_detected
)? YES
: NO
;
2221 /* Clear this in case user app close()d before reading EOF token */
2222 status_eof_detected
= NO
;
2224 reported_read_eof
= NO
;
2225 reported_write_eof
= NO
;
2228 switch (flags
& O_ACCMODE
)
2233 case O_WRONLY
: /* Fallthru... Strictly speaking this is not correct... */
2234 case O_RDWR
: /* Reads are allowed as long as nothing is written */
2235 mode_access
= WRITE
;
2239 /* This is to avoid tape-changed problems (TP_CNI exception).
2241 * Since removing the cartridge will not raise an exception,
2242 * we always do a tp_sense() to make sure we have the proper
2243 * CNI status, the 2150L may need an additional sense.... - Eddy
2245 s
= tp_sense(TP_WRP
|TP_EOM
|TP_BOM
|TP_CNI
|TP_EOR
);
2249 /* Try to clear cartridge-changed status for Archive-2150L */
2250 if ((tperror
.exs
& TP_ST0
) && (tperror
.exs
& TP_CNI
))
2252 s
= tp_sense(TP_WRP
|TP_EOM
|TP_BOM
|TP_CNI
|TP_EOR
);
2258 tpqputs(TPQD_ALWAYS
, "open: sense() failed");
2262 /* exception bits should be up-to-date now, so check for
2263 * tape presence and exit if absent.
2264 * Even `mt stat' will fail without a tape.
2266 if ((tperror
.exs
& TP_ST0
) && (tperror
.exs
& TP_CNI
))
2268 tpqputs(TPQD_ALWAYS
, "No tape present.");
2272 /* At this point we can assume that a tape is present and
2273 * that it will remain present until release() is called.
2276 /* not allowed to do QCMD_DENS_* unless tape is rewound */
2277 if ((TP_DENS(dev
)!=0) && (TP_DENS(current_tape_dev
) != TP_DENS(dev
)))
2279 /* force rewind if minor bits have changed,
2280 * i.e. user wants to use tape in different format.
2281 * [assuming single drive operation]
2285 tpqputs(TPQD_REWIND
, "Density minor bits have changed. Forcing rewind.");
2291 /* density bits still the same, but TP_DIAGS bit
2294 current_tape_dev
= dev
;
2297 if (need_rewind
== YES
) /***************** CHECK THIS!!!!!!!! **********/
2299 s
= do_qic_cmd(QCMD_REWIND
, TIM_R
);
2302 tpqputs(TPQD_ALWAYS
, "open: rewind failed");
2308 /* Note: After a reset command, the controller will rewind the tape
2309 * just before performing any tape movement operation! ************ SO SET need_rewind flag!!!!!
2311 if (status_dead
==YES
)
2313 tpqputs(TPQD_ALWAYS
, "open: tape dead, attempting reset");
2314 if (tape_reset(1)!=TE_OK
)
2321 if (tp_sense(~(TP_ST1
|TP_ILL
)) != TE_OK
)
2323 tpqputs(TPQD_ALWAYS
, "open: tp_sense() failed\n");
2324 status_dead
= YES
; /* try reset next time */
2330 /* things should be ok, once we get here */
2333 /* set density: only allowed when TP_BOM status bit is set,
2334 * so we must have done a rewind by now. If not, just skip over.
2335 * Only give set density command when minor bits have changed.
2337 if (TP_DENS(current_tape_dev
) == TP_DENS(dev
) )
2342 current_tape_dev
= dev
;
2346 dens
= TP_DENS(dev
);
2349 if (dens
< sizeof(format_names
)/sizeof(char *))
2351 printk(TPQIC02_NAME
": format: %s%s\n", (dens
!=0)? "QIC-" : "", format_names
[dens
]);
2355 tpqputs(TPQD_REWIND
, "Wait for retensioning...");
2358 switch (TP_DENS(dev
))
2360 case 0: /* Minor 0 is for drives without set-density support */
2364 s
= do_qic_cmd(QCMD_DENS_11
, TIM_S
);
2367 s
= do_qic_cmd(QCMD_DENS_24
, TIM_S
);
2370 s
= do_qic_cmd(QCMD_DENS_120
, TIM_S
);
2373 s
= do_qic_cmd(QCMD_DENS_150
, TIM_S
);
2376 s
= do_qic_cmd(QCMD_DENS_300
, TIM_S
);
2379 s
= do_qic_cmd(QCMD_DENS_600
, TIM_S
);
2381 default: /* otherwise do a retension before anything else */
2382 s
= do_qic_cmd(QCMD_RETEN
, TIM_R
);
2386 status_dead
= YES
; /* force reset */
2387 current_tape_dev
= 0; /* earlier 0xff80 */
2392 } /* qic02_tape_open */
2395 static int qic02_tape_release(struct inode
* inode
, struct file
* filp
)
2397 kdev_t dev
= inode
->i_rdev
;
2401 printk("qic02_tape_release: dev=%s\n", kdevname(dev
));
2404 if (status_zombie
==NO
) /* don't rewind in zombie mode */
2406 /* Terminate any pending write cycle. Terminating the read-cycle
2407 * is delayed until it is required to do so for a new command.
2409 terminate_write(-1);
2411 if (status_dead
==YES
)
2413 tpqputs(TPQD_ALWAYS
, "release: device dead!?");
2416 /* Rewind only if minor number requires it AND
2417 * read/writes have been done. ************* IS THIS CORRECT??????????
2419 if ((TP_REWCLOSE(dev
)) && (status_bytes_rd
| status_bytes_wr
))
2421 tpqputs(TPQD_REWIND
, "release: Doing rewind...");
2422 (void) do_qic_cmd(QCMD_REWIND
, TIM_R
);
2429 } /* qic02_tape_release */
2432 #ifdef CONFIG_QIC02_DYNCONF
2433 /* Set masks etc. based on the interface card type. */
2434 static int update_ifc_masks(int ifc
)
2436 QIC02_TAPE_IFC
= ifc
;
2438 if ((QIC02_TAPE_IFC
== WANGTEK
) || (QIC02_TAPE_IFC
== EVEREX
))
2440 QIC02_STAT_PORT
= QIC02_TAPE_PORT
;
2441 QIC02_CTL_PORT
= QIC02_TAPE_PORT
;
2442 QIC02_CMD_PORT
= QIC02_TAPE_PORT
+1;
2443 QIC02_DATA_PORT
= QIC02_TAPE_PORT
+1;
2444 QIC02_STAT_READY
= WT_QIC02_STAT_READY
;
2445 QIC02_STAT_EXCEPTION
= WT_QIC02_STAT_EXCEPTION
;
2446 QIC02_STAT_MASK
= WT_QIC02_STAT_MASK
;
2448 QIC02_STAT_RESETMASK
= WT_QIC02_STAT_RESETMASK
;
2449 QIC02_STAT_RESETVAL
= WT_QIC02_STAT_RESETVAL
;
2451 QIC02_CTL_RESET
= WT_QIC02_CTL_RESET
;
2452 QIC02_CTL_REQUEST
= WT_QIC02_CTL_REQUEST
;
2454 if (QIC02_TAPE_DMA
== 3)
2456 WT_CTL_DMA
= WT_CTL_DMA3
;
2458 else if (QIC02_TAPE_DMA
== 1)
2460 WT_CTL_DMA
= WT_CTL_DMA1
;
2464 tpqputs(TPQD_ALWAYS
, "Unsupported or incorrect DMA channel");
2468 if (QIC02_TAPE_IFC
== EVEREX
)
2470 /* Everex is a special case for Wangtek (actually
2471 * it's the other way 'round, but I saw Wangtek first)
2473 if (QIC02_TAPE_DMA
==3)
2475 WT_CTL_DMA
= WT_CTL_DMA1
;
2478 /* Fixup the kernel copy of the IFC type to that
2479 * we don't have to distinguish between Wangtek and
2480 * and Everex at runtime.
2482 QIC02_TAPE_IFC
= WANGTEK
;
2485 else if (QIC02_TAPE_IFC
== ARCHIVE
)
2487 QIC02_STAT_PORT
= QIC02_TAPE_PORT
+1;
2488 QIC02_CTL_PORT
= QIC02_TAPE_PORT
+1;
2489 QIC02_CMD_PORT
= QIC02_TAPE_PORT
;
2490 QIC02_DATA_PORT
= QIC02_TAPE_PORT
;
2491 QIC02_STAT_READY
= AR_QIC02_STAT_READY
;
2492 QIC02_STAT_EXCEPTION
= AR_QIC02_STAT_EXCEPTION
;
2493 QIC02_STAT_MASK
= AR_QIC02_STAT_MASK
;
2495 QIC02_STAT_RESETMASK
= AR_QIC02_STAT_RESETMASK
;
2496 QIC02_STAT_RESETVAL
= AR_QIC02_STAT_RESETVAL
;
2498 QIC02_CTL_RESET
= AR_QIC02_CTL_RESET
;
2499 QIC02_CTL_REQUEST
= AR_QIC02_CTL_REQUEST
;
2501 if (QIC02_TAPE_DMA
> 3)
2503 tpqputs(TPQD_ALWAYS
, "Unsupported or incorrect DMA channel");
2507 else if (QIC02_TAPE_IFC
== MOUNTAIN
)
2509 QIC02_STAT_PORT
= QIC02_TAPE_PORT
+1;
2510 QIC02_CTL_PORT
= QIC02_TAPE_PORT
+1;
2511 QIC02_CMD_PORT
= QIC02_TAPE_PORT
;
2512 QIC02_DATA_PORT
= QIC02_TAPE_PORT
;
2514 QIC02_STAT_READY
= MTN_QIC02_STAT_READY
;
2515 QIC02_STAT_EXCEPTION
= MTN_QIC02_STAT_EXCEPTION
;
2516 QIC02_STAT_MASK
= MTN_QIC02_STAT_MASK
;
2518 QIC02_STAT_RESETMASK
= MTN_QIC02_STAT_RESETMASK
;
2519 QIC02_STAT_RESETVAL
= MTN_QIC02_STAT_RESETVAL
;
2521 QIC02_CTL_RESET
= MTN_QIC02_CTL_RESET
;
2522 QIC02_CTL_REQUEST
= MTN_QIC02_CTL_REQUEST
;
2524 if (QIC02_TAPE_DMA
> 3)
2526 tpqputs(TPQD_ALWAYS
, "Unsupported or incorrect DMA channel");
2532 tpqputs(TPQD_ALWAYS
, "Invalid interface type");
2535 return qic02_get_resources();
2536 } /* update_ifc_masks */
2540 /* ioctl allows user programs to rewind the tape and stuff like that */
2541 static int qic02_tape_ioctl(struct inode
* inode
, struct file
* filp
,
2542 unsigned int iocmd
, unsigned long ioarg
)
2545 int dev_maj
= MAJOR(inode
->i_rdev
);
2547 struct mtop operation
;
2548 unsigned char blk_addr
[6];
2549 struct mtpos ioctl_tell
;
2552 if (TP_DIAGS(current_tape_dev
))
2554 printk(TPQIC02_NAME
": ioctl(%4x, %4x, %4lx)\n", dev_maj
, iocmd
, ioarg
);
2557 if (!inode
|| !ioarg
)
2562 /* check iocmd first */
2564 if (dev_maj
!= QIC02_TAPE_MAJOR
)
2566 printk(TPQIC02_NAME
": Oops! Wrong device?\n");
2567 /* A panic() would be appropriate here */
2573 #ifdef CONFIG_QIC02_DYNCONF
2574 if (c
== _IOC_NR(MTIOCGETCONFIG
))
2576 CHECK_IOC_SIZE(mtconfiginfo
);
2578 if (copy_to_user((char *) ioarg
, (char *) &qic02_tape_dynconf
, sizeof(qic02_tape_dynconf
)))
2585 else if (c
== _IOC_NR(MTIOCSETCONFIG
))
2587 /* One should always do a MTIOCGETCONFIG first, then update
2588 * user-settings, then write back with MTIOCSETCONFIG.
2589 * The qic02conf program should re-open() the device before actual
2590 * use, to make sure everything is initialized.
2593 CHECK_IOC_SIZE(mtconfiginfo
);
2600 if ((doing_read
!=NO
) || (doing_write
!=NO
))
2605 if (status_zombie
==NO
)
2607 qic02_release_resources(); /* and go zombie */
2610 /* copy struct from user space to kernel space */
2611 if (copy_from_user((char *) &qic02_tape_dynconf
, (char *) ioarg
, sizeof(qic02_tape_dynconf
)))
2615 return update_ifc_masks(qic02_tape_dynconf
.ifc_type
);
2617 if (status_zombie
==YES
)
2619 tpqputs(TPQD_ALWAYS
, "Configs not set");
2623 if (c
== _IOC_NR(MTIOCTOP
))
2625 CHECK_IOC_SIZE(mtop
);
2627 /* copy mtop struct from user space to kernel space */
2628 if (copy_from_user((char *) &operation
, (char *) ioarg
, sizeof(operation
)))
2633 /* ---note: mt_count is signed, negative seeks must be
2634 * --- translated to seeks in opposite direction!
2635 * (only needed for Sun-programs, I think.)
2637 /* ---note: MTFSF with count 0 should position the
2638 * --- tape at the beginning of the current file.
2641 if (TP_DIAGS(current_tape_dev
))
2643 printk("OP op=%4x, count=%4x\n", operation
.mt_op
, operation
.mt_count
);
2646 if (operation
.mt_count
< 0)
2648 tpqputs(TPQD_ALWAYS
, "Warning: negative mt_count ignored");
2651 ioctl_status
.mt_resid
= operation
.mt_count
;
2652 if (operation
.mt_op
== MTSEEK
)
2659 seek_addr_buf
[0] = (operation
.mt_count
>>16)&0xff;
2660 seek_addr_buf
[1] = (operation
.mt_count
>>8)&0xff;
2661 seek_addr_buf
[2] = (operation
.mt_count
)&0xff;
2662 if (operation
.mt_count
>>24)
2666 if ((error
= do_ioctl_cmd(operation
.mt_op
)) != 0)
2671 ioctl_status
.mt_resid
= 0;
2675 while (operation
.mt_count
> 0)
2677 operation
.mt_count
--;
2678 if ((error
= do_ioctl_cmd(operation
.mt_op
)) != 0)
2683 ioctl_status
.mt_resid
= operation
.mt_count
;
2689 else if (c
== _IOC_NR(MTIOCGET
))
2691 if (TP_DIAGS(current_tape_dev
))
2696 CHECK_IOC_SIZE(mtget
);
2698 /* It appears (gmt(1)) that it is normal behaviour to
2699 * first set the status with MTNOP, and then to read
2700 * it out with MTIOCGET
2703 /* copy results to user space */
2704 if (copy_to_user((char *) ioarg
, (char *) &ioctl_status
, sizeof(ioctl_status
)))
2710 else if (TP_HAVE_TELL
&& (c
== _IOC_NR(MTIOCPOS
)))
2712 if (TP_DIAGS(current_tape_dev
))
2717 CHECK_IOC_SIZE(mtpos
);
2719 tpqputs(TPQD_IOCTLS
, "MTTELL reading block address");
2720 if ((doing_read
==YES
) || (doing_write
==YES
))
2722 finish_rw(AR_QCMDV_TELL_BLK
);
2725 c
= rdstatus((char *) blk_addr
, sizeof(blk_addr
), AR_QCMDV_TELL_BLK
);
2731 ioctl_tell
.mt_blkno
= (blk_addr
[3] << 16) | (blk_addr
[4] << 8) | blk_addr
[5];
2733 /* copy results to user space */
2734 if (copy_to_user((char *) ioarg
, (char *) &ioctl_tell
, sizeof(ioctl_tell
)))
2743 return -ENOTTY
; /* Other cmds not supported. */
2745 } /* qic02_tape_ioctl */
2749 /* These are (most) of the interface functions: */
2750 static struct file_operations qic02_tape_fops
= {
2751 qic02_tape_lseek
, /* not allowed */
2752 qic02_tape_read
, /* read */
2753 qic02_tape_write
, /* write */
2754 NULL
, /* readdir not allowed */
2755 NULL
, /* poll ??? */
2756 qic02_tape_ioctl
, /* ioctl */
2757 NULL
, /* mmap not allowed */
2758 qic02_tape_open
, /* open */
2759 qic02_tape_release
, /* release */
2762 NULL
, /* check_media_change */
2763 NULL
/* revalidate */
2767 /* Why is this not is one place? */
2768 /* Pure 2^n version of get_order */
2769 static inline int __get_order(unsigned long size
)
2773 size
= (size
-1) >> (PAGE_SHIFT
-1);
2784 static void qic02_release_resources(void)
2786 free_irq(QIC02_TAPE_IRQ
, NULL
);
2787 free_dma(QIC02_TAPE_DMA
);
2788 release_region(QIC02_TAPE_PORT
, QIC02_TAPE_PORT_RANGE
);
2791 free_pages(buffaddr
, __get_order(TPQBUF_SIZE
));
2793 buffaddr
= 0; /* Better to cause a panic than overwite someone else */
2794 status_zombie
= YES
;
2795 } /* qic02_release_resources */
2798 static int qic02_get_resources(void)
2800 /* First perform some checks. If one of them fails,
2801 * the tape driver will not be registered to the system.
2803 if (QIC02_TAPE_IRQ
>16)
2805 tpqputs(TPQD_ALWAYS
, "Bogus interrupt number.");
2809 /* for DYNCONF, allocating IO, DMA and IRQ should not be done until
2810 * the config parameters have been set using MTSETCONFIG.
2813 if (check_region(QIC02_TAPE_PORT
, QIC02_TAPE_PORT_RANGE
))
2815 printk(TPQIC02_NAME
": IO space at 0x%x [%d ports] already reserved\n",
2816 QIC02_TAPE_PORT
, QIC02_TAPE_PORT_RANGE
);
2821 if (request_irq(QIC02_TAPE_IRQ
, qic02_tape_interrupt
, SA_INTERRUPT
, "QIC-02", NULL
))
2823 printk(TPQIC02_NAME
": can't allocate IRQ%d for QIC-02 tape\n",
2828 /* After IRQ, allocate DMA channel */
2829 if (request_dma(QIC02_TAPE_DMA
,"QIC-02"))
2831 printk(TPQIC02_NAME
": can't allocate DMA%d for QIC-02 tape\n",
2833 free_irq(QIC02_TAPE_IRQ
, NULL
);
2837 /* Grab the IO region. We already made sure it's available. */
2838 request_region(QIC02_TAPE_PORT
, QIC02_TAPE_PORT_RANGE
, TPQIC02_NAME
);
2840 /* Setup the page-address for the dma transfer. */
2842 /*** TODO: does _get_dma_pages() really return the physical address?? ****/
2843 buffaddr
= __get_dma_pages(GFP_KERNEL
,__get_order(TPQBUF_SIZE
));
2847 qic02_release_resources();
2848 return -EBUSY
; /* Not ideal, EAGAIN perhaps? */
2851 memset( (void*) buffaddr
, 0, TPQBUF_SIZE
);
2853 printk(TPQIC02_NAME
": Settings: IRQ %d, DMA %d, IO 0x%x, IFC %s\n",
2854 QIC02_TAPE_IRQ
, QIC02_TAPE_DMA
,
2855 ((QIC02_TAPE_IFC
==ARCHIVE
) || (QIC02_TAPE_IFC
==MOUNTAIN
))?
2856 QIC02_CMD_PORT
: QIC02_STAT_PORT
,
2857 (QIC02_TAPE_IFC
==MOUNTAIN
)? "Mountain" :
2858 ((QIC02_TAPE_IFC
==ARCHIVE
)? "Archive" : "Wangtek"));
2860 if (tape_reset(0)!=TE_OK
|| tp_sense(TP_WRP
|TP_POR
|TP_CNI
)!=TE_OK
)
2862 /* No drive detected, so vanish */
2863 tpqputs(TPQD_ALWAYS
, "No drive detected -- releasing IO/IRQ/DMA.");
2865 qic02_release_resources();
2869 /* All should be ok now */
2872 } /* qic02_get_resources */
2874 __initfunc(int qic02_tape_init(void))
2876 if (TPSTATSIZE
!= 6)
2878 printk(TPQIC02_NAME
": internal error: tpstatus struct incorrect!\n");
2881 if ((TPQBUF_SIZE
<512) || (TPQBUF_SIZE
>=0x10000))
2883 printk(TPQIC02_NAME
": internal error: DMA buffer size out of range\n");
2887 current_tape_dev
= MKDEV(QIC02_TAPE_MAJOR
, 0);
2889 #ifndef CONFIG_QIC02_DYNCONF
2890 printk(TPQIC02_NAME
": IRQ %d, DMA %d, IO 0x%x, IFC %s, %s, %s\n",
2891 QIC02_TAPE_IRQ
, QIC02_TAPE_DMA
,
2892 # if QIC02_TAPE_IFC == WANGTEK
2893 QIC02_STAT_PORT
, "Wangtek",
2894 # elif QIC02_TAPE_IFC == ARCHIVE
2895 QIC02_CMD_PORT
, "Archive",
2896 # elif QIC02_TAPE_IFC == MOUNTAIN
2897 QIC02_CMD_PORT
, "Mountain",
2901 rcs_revision
, rcs_date
);
2902 if (qic02_get_resources())
2907 printk(TPQIC02_NAME
": Runtime config, %s, %s\n",
2908 rcs_revision
, rcs_date
);
2910 printk(TPQIC02_NAME
": DMA buffers: %u blocks\n", NR_BLK_BUF
);
2911 /* If we got this far, install driver functions */
2912 if (register_chrdev(QIC02_TAPE_MAJOR
, TPQIC02_NAME
, &qic02_tape_fops
))
2914 printk(TPQIC02_NAME
": Unable to get chrdev major %d\n", QIC02_TAPE_MAJOR
);
2915 #ifndef CONFIG_QIC02_DYNCONF
2916 qic02_release_resources();
2923 timer_table
[QIC02_TAPE_TIMER
].expires
= 0;
2924 timer_table
[QIC02_TAPE_TIMER
].fn
= qic02_tape_times_out
;
2926 #ifndef CONFIG_QIC02_DYNCONF
2927 if (tape_reset(0)!=TE_OK
|| tp_sense(TP_WRP
|TP_POR
|TP_CNI
)!=TE_OK
)
2929 /* No drive detected, so vanish */
2930 tpqputs(TPQD_ALWAYS
, "No drive detected -- driver going on vacation...");
2931 qic02_release_resources();
2939 tpqputs(TPQD_ALWAYS
, "exception detected\n");
2940 (void) tp_sense(TP_WRP
|TP_POR
|TP_CNI
);
2945 /* initialize generic status for ioctl requests */
2947 ioctl_status
.mt_type
= QIC02_TAPE_DRIVE
; /* MT_IS* id nr */
2949 ioctl_status
.mt_resid
= 0; /* ---residual count */
2950 ioctl_status
.mt_gstat
= 0; /* ---generic status */
2951 ioctl_status
.mt_erreg
= 0; /* not used */
2952 ioctl_status
.mt_fileno
= 0; /* number of current file on tape */
2953 ioctl_status
.mt_blkno
= 0; /* number of current (logical) block */
2956 } /* qic02_tape_init */
2960 void cleanup_module(void)
2962 if (status_zombie
== NO
)
2964 qic02_release_resources();
2966 unregister_chrdev(QIC02_TAPE_MAJOR
, TPQIC02_NAME
);
2969 int init_module(void)
2972 retval
=qic02_tape_init();
2973 # ifdef CONFIG_QIC02_DYNCONF
2974 /* This allows the dynamic config program to setup the card
2975 * by presetting qic02_tape_dynconf via insmod
2977 if (!retval
&& qic02_tape_dynconf
.ifc_type
)
2979 retval
=update_ifc_masks(qic02_tape_dynconf
.ifc_type
);