wt.c - version 1.3

from:
Sergey Ryzhkov, Serge Vakulenko
E-mail: <sir@kiae.su>, <vak@zebub.msk.su>

This is the streamer tape driver for 386bsd and FreeBSD, which
supports Wangtek and Archive compatible QIC-02/QIC-36 controllers.
It was developed as a replacement of the old Wangtek tape driver from CMU.

In comparison with the CMU driver, this version has the following enhancements:
1) Support for Archive SC402 and SC499 tape controllers added.
2) Support for up to three tape controllers on the same machine.
3) Support for BSD-style ioctls MTIOCGET, MTIOCTOP.
   Mt command now works adequately with this driver.
2) Asynchronous REWIND and FSF operations, close() will not wait
   until they finish.  The next open() will wait for it instead.
4) Use of WTQICMD ioctl is limited to ERASE and RETENS operations.
   This prevents the user from locking the tape driver by strange
   tape operations.
5) Tape density switching added.
6) The status of the process, blocked on the tape operation,
   is displayed at the WCHAN column of the `ps' command as:

	wtread    reading data from the tape
	wtwrite   writing data to the tape
	wtrfm     reading the tape marker
	wtwfm     writing the tape marker
	wtrew     rewinding the tape
	wterase   doing WTQICMD ERASE operation
	wtretens  doing WTQICMD RETENS operation
	wtorew    doing MTIOCTOP REW/OFFL operation
	wtorfm    doing MTIOCTOP FSF operation
	wtowfm    doing MTIOCTOP WEOF operation

7) It's possible to use the tape with "default density",
   useful for devices which don't support density switching
   or do automatic format determination.
8) Some controllers support only 1024 block length.
   Setting WT_BSIZE bit in device minor number turns on this mode.

Minor number structure:
	0bfffuuu
Fields:
	uuu   - Unit number. It's possible to install
		up to three tape controllers on the same machine,
		using DRQs 1..3.  Hence, unit number can lie
		in range 0..2.
	fff   - Tape format number:
		0 - /dev/rwt0  - default density (auto select)
		1 - /dev/rwt0a - QIC 11 (obsolete)
		2 - /dev/rwt0b - QIC 24 (60 megabytes)
		3 - /dev/rwt0c - QIC 120 (120 megabytes)
		4 - /dev/rwt0d - QIC 150 (150 megabytes)
		5 - /dev/rwt0e - QIC 300 (300 megabytes?)
		6 - /dev/rwt0f - QIC 600 (600 megabytes?)
	b     - Long block size flag.  With this bit set,
		the driver will perform all i/o operations
		with the controller using 1024-byte
		blocks, instead of 512 ones.
		Some controllers need it (CMS for example).
		If you Wangtek controller does not stream well,
		you can try to use /dev/rWt0 device instead
		of /dev/rwt0 (uncomment needed lines in /dev/MAKEDEV
		to create it).

Block interface (writing blocks less than 2048 bytes) is not functioning
pwoperly.  Use raw interface instead.

Thanks to all who helped to test it on the following hardware:

Controller           Drive            Volume    Interface     Thanks to
---------------------------------------------------------------------------
Archive SC-499       Archive 2150L    150 Meg   QIC-02        KIAE
CMS?                 ?                150 Meg   QIC-02        KIAE
Everex EV 831/833    ?                ?         QIC-36        Joergen Haegg
Wangtek ASSY         Wangtek          60 Meg    QIC-02        Ken Whedbee
Tecmar QT150i?       Wangtek 5150EQ   ?         QIC-02?       Marko Teiste
?                    Wangtek 5099EK   60 Meg    QIC-36        Robert Shien
Archive SC400S       ?                60 Meg    ?             Warren Toomey

1 files changed, 26 insertions, 12 deletions

diff --git a/sys/i386/isa/wtreg.h b/sys/i386/isa/wtreg.h
index d7658f3..e45e514 100644
--- a/sys/i386/isa/wtreg.h
+++ b/sys/i386/isa/wtreg.h
@@ -1,12 +1,12 @@
 /*
  * Streamer tape driver for 386bsd and FreeBSD.
- * Supports Archive QIC-02 and Wangtek QIC-02/QIC-36 boards.
+ * Supports Archive and Wangtek compatible QIC-02/QIC-36 boards.
  *
  * Copyright (C) 1993 by:
  *      Sergey Ryzhkov       <sir@kiae.su>
  *      Serge Vakulenko      <vak@zebub.msk.su>
  *
- * Placed in the public domain with NO WARRANTIES, not even the implied
+ * This software is distributed with NO WARRANTIES, not even the implied
  * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  *
  * Authors grant any other persons or organisations permission to use
@@ -18,8 +18,9 @@
  * Authors thank Robert Baron, CMU and Intel and retain here
  * the original CMU copyright notice.
  *
- *	from: Version 1.1, Fri Sep 24 02:14:42 MSD 1993
- *	$Id$
+ * Version 1.3, Thu Nov 11 12:09:13 MSK 1993
+ * $Id$
+ *
  */
 
 /*
@@ -53,8 +54,8 @@
 #define WTQICMD         _IO('W', 0)
 
 /* QIC-02 commands allowed for WTQICMD */
-#define QIC_ERASE       0x22
-#define QIC_RETENS      0x24
+#define QIC_ERASE       0x22    /* erase the tape */
+#define QIC_RETENS      0x24    /* retension the tape */
 
 /* internal QIC-02 commands */
 #define QIC_RDDATA      0x80    /* read data */
@@ -67,6 +68,8 @@
 #define QIC_FMT24       0x27    /* set format QIC-24 */
 #define QIC_FMT120      0x28    /* set format QIC-120 */
 #define QIC_FMT150      0x29    /* set format QIC-150 */
+#define QIC_FMT300      0x2a    /* set format QIC-300/QIC-2100 */
+#define QIC_FMT600      0x2b    /* set format QIC-600/QIC-2200 */
 
 /* tape driver flags */
 #define TPINUSE         0x0001  /* tape is already open */
@@ -97,15 +100,26 @@
 #define TP_ST0          0x0080  /* Status byte 0 bits */
 #define TP_ST0MASK      0x00ff  /* Status byte 0 mask */
 #define TP_POR          0x0100  /* Power on/reset occurred */
-#define TP_RES1         0x0200  /* Reserved for end of media */
-#define TP_RES2         0x0400  /* Reserved for bus parity */
+#define TP_ERM          0x0200  /* Reserved for end of recorded media */
+#define TP_BPE          0x0400  /* Reserved for bus parity error */
 #define TP_BOM          0x0800  /* Beginning of media */
-#define	TP_MBD		0x1000	/* Marginal block detected */
-#define	TP_NDT		0x2000	/* No data detected */
+#define TP_MBD          0x1000  /* Marginal block detected */
+#define TP_NDT          0x2000  /* No data detected */
 #define TP_ILL          0x4000  /* Illegal command - should not happen! */
-#define	TP_ST1		0x8000	/* Status byte 1 bits */
+#define TP_ST1          0x8000  /* Status byte 1 bits */
 #define TP_ST1MASK      0xff00  /* Status byte 1 mask */
 
 /* formats for printing flags and error values */
 #define WTDS_BITS "\20\1inuse\2read\3write\4start\5rmark\6wmark\7rew\10excep\11vol\12wo\13ro\14wany\15rany\16wp\17timer\20active"
-#define WTER_BITS "\20\1eof\2bnl\3uda\4eom\5wrp\6usl\7cni\11por\12res1\13res2\14bom\15mbd\16ndt\17ill"
+#define WTER_BITS "\20\1eof\2bnl\3uda\4eom\5wrp\6usl\7cni\11por\12erm\13bpe\14bom\15mbd\16ndt\17ill"
+
+/* device minor number */
+#define WT_BSIZE        0100    /* long block flag */
+#define WT_DENSEL       0070    /* density select mask */
+#define WT_DENSDFLT     0000    /* default density */
+#define WT_QIC11        0010    /* 11 megabytes? */
+#define WT_QIC24        0020    /* 60 megabytes */
+#define WT_QIC120       0030    /* 120 megabytes */
+#define WT_QIC150       0040    /* 150 megabytes */
+#define WT_QIC300       0050    /* 300 megabytes? */
+#define WT_QIC600       0060    /* 600 megabytes? */