devkbin.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10

    1 /*
    2  *  keyboard scan code input from outside the kernel.
    3  *  to avoid duplication of keyboard map processing for usb.
    4  */
    5 
    6 #include        "u.h"
    7 #include        "../port/lib.h"
    8 #include        "mem.h"
    9 #include        "dat.h"
   10 #include        "fns.h"
   11 #include        "../port/error.h"
   12 
   13 extern  void kbdputsc(int, int);
   14 
   15 enum {
   16         Qdir,
   17         Qkbd,
   18 };
   19 
   20 Dirtab kbintab[] = {
   21         ".",    {Qdir, 0, QTDIR},       0,      0555,
   22         "kbin", {Qkbd, 0},              0,      0200,
   23 };
   24 
   25 Lock    kbinlck;
   26 int     kbinbusy;
   27 
   28 static Chan *
   29 kbinattach(char *spec)
   30 {
   31         return devattach(L'Ι', spec);
   32 }
   33 
   34 static Walkqid*
   35 kbinwalk(Chan *c, Chan *nc, char **name, int nname)
   36 {
   37         return devwalk(c, nc, name, nname, kbintab, nelem(kbintab), devgen);
   38 }
   39 
   40 static int
   41 kbinstat(Chan *c, uchar *dp, int n)
   42 {
   43         return devstat(c, dp, n, kbintab, nelem(kbintab), devgen);
   44 }
   45 
   46 static Chan*
   47 kbinopen(Chan *c, int omode)
   48 {
   49         if(!iseve())
   50                 error(Eperm);
   51         if(c->qid.path == Qkbd){
   52                 lock(&kbinlck);
   53                 if(kbinbusy){
   54                         unlock(&kbinlck);
   55                         error(Einuse);
   56                 }
   57                 kbinbusy++;
   58                 unlock(&kbinlck);
   59         }
   60         return devopen(c, omode, kbintab, nelem(kbintab), devgen);
   61 }
   62 
   63 static void
   64 kbinclose(Chan *c)
   65 {
   66         if(c->aux){
   67                 free(c->aux);
   68                 c->aux = nil;
   69         }
   70         if(c->qid.path == Qkbd)
   71                 kbinbusy = 0;
   72 }
   73 
   74 static long
   75 kbinread(Chan *c, void *a, long n, vlong )
   76 {
   77         if(c->qid.type == QTDIR)
   78                 return devdirread(c, a, n, kbintab, nelem(kbintab), devgen);
   79         return 0;
   80 }
   81 
   82 static long
   83 kbinwrite(Chan *c, void *a, long n, vlong)
   84 {
   85         int i;
   86         uchar *p = a;
   87 
   88         if(c->qid.type == QTDIR)
   89                 error(Eisdir);
   90         switch((int)c->qid.path){
   91         case Qkbd:
   92                 for(i = 0; i < n; i++)
   93                         kbdputsc(*p++, 1);      /* external source */
   94                 break;
   95         default:
   96                 error(Egreg);
   97         }
   98         return n;
   99 }
  100 
  101 Dev kbindevtab = {
  102         L'Ι',
  103         "kbin",
  104 
  105         devreset,
  106         devinit,
  107         devshutdown,
  108         kbinattach,
  109         kbinwalk,
  110         kbinstat,
  111         kbinopen,
  112         devcreate,
  113         kbinclose,
  114         kbinread,
  115         devbread,
  116         kbinwrite,
  117         devbwrite,
  118         devremove,
  119         devwstat,
  120 };

Cache object: 899f93bfa288591c828d841f3d50b3d1

[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.

FreeBSD/Linux Kernel Cross Reference sys/pc/devkbin.c

FreeBSD/Linux Kernel Cross Reference
sys/pc/devkbin.c