det@hawkmoon.MN.ORG (Derek E. Terveer) (01/15/91)
Here is the power sequencing patch for the recently posted st-01 beta driver
(posted by mike@cimcor.mn.org) This power sequencing code works for me on my
esix 5.3.2-d system running a wren iv. Your milage may vary. If anyone can
tell me why i can't get the power down code at shutdown time to work, please
let me know! (i'm no scsi expert, you see)
*** scsi.c.old Sun Jan 13 20:53:57 1991
--- scsi.c Tue Jan 15 02:28:03 1991
***************
*** 25,34 ****
#include <sys/proc.h>
#include <sys/strlog.h>
#include <sys/vtoc.h>
#include "st01.h"
#include "scommands.h"
! #define COPYRIGHT "scsi disk driver V2.0"
#define ASM /* use certain routines coded in assembly */
#define TICKSPERSECOND HZ /* system timer ticks per second */
--- 25,42 ----
#include <sys/proc.h>
#include <sys/strlog.h>
#include <sys/vtoc.h>
+ #include <sys/scsi.h>
#include "st01.h"
#include "scommands.h"
! #define then
! #define FALSE 0
! #define FAIL 0
! #define TRUE 1
! #define SUCCESS 1
! char *pid="st01: "; /* this program's identification */
+ #define COPYRIGHT "scsi disk driver V2.1"
+
#define ASM /* use certain routines coded in assembly */
#define TICKSPERSECOND HZ /* system timer ticks per second */
***************
*** 1183,1188 ****
--- 1191,1265 ----
return 1;
}
+ /*******************************************************************************
+ * *
+ * start_unit() *
+ * *
+ ******************************************************************************/
+
+
+ /* This starts/stops the motor on a drive.
+ */
+
+ static int
+ start_unit(unit,start)
+
+ int unit;
+ int start; /* true if start, else stop */
+
+ {
+ int cc;
+ char cmd[6];
+
+ #if defined(DEBUG)
+ printf("start_unit(%d,st%s)\n",unit,start?"art":"op");
+ #endif
+
+ cmd[0]=SS_ST_SP;
+ cmd[1]=unit<<5 + start?0:1; /* return status immediately if stop */
+ cmd[2]=0;
+ cmd[3]=0;
+ cmd[4]=start?1:0; /* turn motor on or off */
+ cmd[5]=0;
+
+ cc=doscsicmd(unit,cmd,NULL,0,start?250:10,2,0,0,0,NULL);
+ if (cc!=COK && cc!=CDISCONNECT) {
+ printf("%scouldn't st%s unit %d! (%d)\n",pid,start?"art":"op",unit,cc);
+ return(FAIL);
+ }
+ return(SUCCESS);
+ } /* start_unit */
+
+ /*******************************************************************************
+ * *
+ * scsihalt() *
+ * *
+ * This routine is *not* called during reboot operations, i.e., init 5 or init *
+ * 6. Only when init 0 is invoked. *
+ * *
+ ******************************************************************************/
+
+
+ extern
+ scsihalt()
+
+ { long l;
+ int unit;
+
+ /* stop all drives
+ */
+
+ #if defined(DEBUG)
+ printf("scsihalt()\n");
+ #endif
+
+ for (unit=0; unit<SCSIMAXDRIVES; ++unit)
+ {if (d[unit].blocksize) start_unit(unit,FALSE); /* spin drive down */
+ } /* each drive */
+ return(SUCCESS);
+ } /* scsihalt */
+
+
/* This is used to initialize the drive at system startup time */
static initdrive(unit)
***************
*** 1199,1204 ****
--- 1276,1309 ----
d[unit].nparts=0;
d[unit].nomsgs=0;
+ #if !defined(OLD_START)
+ {int newline=FALSE;
+ a=!COK;
+ for (bs=2; bs && a!=COK; --bs)
+ {a=testready(unit);
+ if (a == COK)
+ then break;
+ else
+ {if (a!=CERROR && a!=CBUSY) return FAIL; /* no point in waiting */
+ start_unit(unit,TRUE);
+ if (testready(unit)!=COK) {
+ printf("\tWaiting for unit %d powerup",unit);
+ newline=TRUE;
+ for (l=0;l<10000000l;l++)
+ if (l % 100000l == 0) {
+ printf(".");
+ a=testready(unit);
+ if (a == COK) break;
+ } /* test again, every so often */
+ if (a != COK) printf("\n%sPowerup timeout on drive %d",pid,unit);
+ } /* not ready after start */
+ } /* not ready */
+ } /* try twice */
+ if (newline) printf("\n");
+ } /* scope of newline */
+ if (a!=COK) return FAIL;
+
+ #else
a=testready(unit);
if (a != COK)
{
***************
*** 1218,1223 ****
--- 1323,1330 ----
return 0;
}
}
+ #endif
+
a=requestsense(unit,buf,sizeof(buf),1);
if (a == CNOCONNECT || a == CBUSBUSY)
return 0;
***************
*** 1355,1361 ****
scsiclose()
{
#ifdef DEBUG0
! strlog(0, unit, 0, SL_ERROR, "scsiclose called\n");
#endif
/* do nothing */
}
--- 1462,1468 ----
scsiclose()
{
#ifdef DEBUG0
! strlog(0, 0, 0, SL_ERROR, "scsiclose called\n");
#endif
/* do nothing */
}
***************
*** 1364,1370 ****
scsiprint()
{
#ifdef DEBUG
! strlog(0, unit, 0, SL_ERROR, "scsiprint called\n");
#endif
/* do nothing */
}
--- 1471,1477 ----
scsiprint()
{
#ifdef DEBUG
! strlog(0, 0, 0, SL_ERROR, "scsiprint called\n");
#endif
/* do nothing */
}
*** README1.old Mon Jan 14 03:36:21 1991
--- README1 Tue Jan 15 03:35:17 1991
***************
*** 42,44 ****
--- 42,65 ----
Many of the hd(7) ioctls are now supported including support
for the ESIX/BSD fast file system.
+ ** Motor start option added by det@hawkmoon.mn.org **
+ This patched version of the heavily modified st-01 driver (mike@cimcor.mn.org)
+ will attempt to start the drives' motors if initial access attempts fail at boot
+ time. If the drive is already started you will see no difference in the
+ driver's operation. Obviously, this attempt will only work for drives that
+ have a motor start option (like most (all?) Wren SCSI drives have). This code
+ has only been tested on a Wren IV. If the drive does not have a motor start
+ option and the drive is not on, the code will eventually time out on the
+ attempt to access the drive, just like the original code -- so no hard should
+ come from having this code in the driver. If however, you don't wish to
+ incorporate the motor start option code, simply add the "-DOLD_START" flag to
+ CFLAGS in the Makefile.
+
+ What is the advantage in this? This provides power sequencing of the drives at
+ boot time. Instead of having all of your drives starting at the same time and
+ drawing a large amount of current, each drive is started and initialized before
+ the next drive. The code is also supposed to power down the drives when a
+ system shut down is performed, i.e., "init 0", not just a reboot (e.g., init 5).
+ However, it doesn't appear to be shutting down the drives... sigh. (:-(
+ To enable the (attempted) drive power-down at shut down time, add the "h" to
+ the second column in the /etc/conf/cf.d/mdevice for the "scsi" driver.
*** Makefile.old Mon Jan 14 03:37:13 1991
--- Makefile Mon Jan 14 04:31:00 1991
***************
*** 6,12 ****
#
#
! CFLAGS = -O #-DDEBUG # -DDEBUG0
all: scsi.o scsiasm.o scsipart verify
ld -r -o Driver.o scsi.o scsiasm.o
--- 6,13 ----
#
#
! CFLAGS = -O #-DDEBUG #-DDEBUG0 # -DOLD_START
! CC=/bin/cc
all: scsi.o scsiasm.o scsipart verify
ld -r -o Driver.o scsi.o scsiasm.o
*** Master.old Mon Jan 14 03:36:40 1991
--- Master Sun Jan 13 21:51:01 1991
***************
*** 1 ****
! scsi Iiocrw ibHc scsi 0 0 1 15 -1
--- 1 ----
! scsi Iiocrwh ibHc scsi 0 0 1 15 -1
--
Derek "Tigger" Terveer det@hawkmoon.MN.ORG - MNFHA, NCS - UMN Women's Lax, MWD
I am the way and the truth and the light, I know all the answers; don't need
your advice. -- "I am the way and the truth and the light" -- The Legendary Pink Dots