75 lines
1.2 KiB
C
75 lines
1.2 KiB
C
/*
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** dynamically loadable clk driver
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**
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** william robertson <rob@agate.berkeley.edu>
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*/
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#include <sys/types.h>
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#include <sys/conf.h>
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#include <sys/errno.h>
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#include <sys/stream.h>
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#include <sys/syslog.h>
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#include <sun/openprom.h>
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#include <sun/vddrv.h>
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extern int findmod(); /* os/str_io.c */
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extern struct streamtab clkinfo;
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struct vdldrv vd = {
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VDMAGIC_USER,
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"clk"
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};
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int
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xxxinit(function_code, vdp, vdi, vds)
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unsigned int function_code;
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struct vddrv *vdp;
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addr_t vdi;
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struct vdstat *vds;
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{
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register int i = 0;
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register int j;
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switch (function_code) {
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case VDLOAD:
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if (findmod("clk") >= 0) {
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log(LOG_ERR, "clk stream module already loaded\n");
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return (EADDRINUSE);
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}
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i = findmod("\0");
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if (i == -1 || fmodsw[i].f_name[0] != '\0')
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return(-1);
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for (j = 0; vd.Drv_name[j] != '\0'; j++) /* XXX check bounds */
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fmodsw[i].f_name[j] = vd.Drv_name[j];
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fmodsw[i].f_name[j] = '\0';
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fmodsw[i].f_str = &clkinfo;
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vdp->vdd_vdtab = (struct vdlinkage *) &vd;
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return(0);
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case VDUNLOAD:
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if ((i = findmod(vd.Drv_name)) == -1)
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return(-1);
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fmodsw[i].f_name[0] = '\0';
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fmodsw[i].f_str = 0;
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return(0);
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case VDSTAT:
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return(0);
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default:
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return(EIO);
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}
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}
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