talexander
/
freebsd_amp_hwpstate
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Submitted by: John Lind (john@starfire.mn.org) 

/*
+  * Code for MTERASE added by John Lind (john@starfire.mn.org) 95/09/02.
+  * This was very easy due to the excellent structure and clear coding
+  * of the original driver.
+  */
This commit is contained in:
Julian Elischer 1995-09-05 05:45:34 +00:00
parent b3aad5a729
commit 193e7834a5
1 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sys/i386/isa/wt.c
View File

@ -19,10 +19,16 @@
* the original CMU copyright notice.
*
* Version 1.3, Thu Nov 11 12:09:13 MSK 1993
* $Id: wt.c,v 1.16 1995/04/12 20:48:13 wollman Exp $
* $Id: wt.c,v 1.17 1995/05/30 08:03:22 rgrimes Exp $
*
*/
/*
* Code for MTERASE added by John Lind (john@starfire.mn.org) 95/09/02.
* This was very easy due to the excellent structure and clear coding
* of the original driver.
*/
/*
* Copyright (c) 1989 Carnegie-Mellon University.
* All rights reserved.
@ -488,6 +494,20 @@ int wtioctl (int dev, int cmd, void *arg, int mode)
if (error = wtwritefm (t))
return (error);
return (0);
case MTERASE: /* erase to EOM */
if (! (t->flags & TPWRITE) || (t->flags & TPWP))
return (EACCES);
if (error = wtwait (t, PCATCH, "wterase"))
return (error);
/* ERASE operations work like REWIND. */
/* Simulate the rewind operation here. */
t->flags &= ~(TPRO | TPWO | TPVOL);
if (! wtcmd (t, QIC_ERASE))
return (EIO);
t->flags |= TPSTART | TPREW;
t->flags |= TPWANY;
wtclock (t);
return (0);
}
return (EINVAL);
}