C++ (Cpp) w_seek Examples

Example #1

File: wavelan.c Project: tusharsoni/Inferno

static int
w_write(Ctlr* ctlr, int type, int off, void* buf, ulong len)
{
    int tries;

    for (tries=0; tries < WTmOut; tries++) {
        if(w_seek(ctlr, type, off, 0)) {
            DEBUG("wavelan: w_write: seek failed\n");
            return 0;
        }

        csr_outss(ctlr, WR_Data0, buf, len/2);

        csr_outs(ctlr, WR_Data0, 0xdead);
        csr_outs(ctlr, WR_Data0, 0xbeef);
        if(w_seek(ctlr, type, off + len, 0)) {
            DEBUG("wavelan: write seek failed\n");
            return 0;
        }
        if(csr_ins(ctlr, WR_Data0) == 0xdead)
            if(csr_ins(ctlr, WR_Data0) == 0xbeef)
                return len;
        DEBUG("wavelan: Hermes bug byte.\n");
        return 0;
    }
    DEBUG("wavelan: tx timeout\n");
    return 0;
}

Example #2

File: wavelan.c Project: Nurb432/plan9front

int
w_inltv(Ctlr* ctlr, Wltv* ltv)
{
	int len;
	ushort code;

	if(w_cmd(ctlr, WCmdAccRd, ltv->type)){
		DEBUG("wavelan: access read failed\n");
		return -1;
	}
	if(w_seek(ctlr,ltv->type,0,1)){
		DEBUG("wavelan: seek failed\n");
		return -1;
	}
	len = csr_ins(ctlr, WR_Data1);
	if(len > ltv->len)
		return -1;
	ltv->len = len;
	if((code=csr_ins(ctlr, WR_Data1)) != ltv->type){
		USED(code);
		DEBUG("wavelan: type %x != code %x\n",ltv->type,code);
		return -1;
	}
	if(ltv->len > 0)
		csr_inss(ctlr, WR_Data1, &ltv->val, ltv->len-1);

	return 0;
}

Example #3

File: wavelan.c Project: Nurb432/plan9front

static void
w_outltv(Ctlr* ctlr, Wltv* ltv)
{
	if(w_seek(ctlr,ltv->type, 0, 1))
		return;
	csr_outss(ctlr, WR_Data1, ltv, ltv->len+1);
	w_cmd(ctlr, WCmdAccWr, ltv->type);
}

Example #4

File: wavelan.c Project: Nurb432/plan9front

static int
w_read(Ctlr* ctlr, int type, int off, void* buf, ulong len)
{
	if(w_seek(ctlr, type, off, 1)){
		DEBUG("wavelan: w_read: seek failed");
		return 0;
	}
	csr_inss(ctlr, WR_Data1, buf, len/2);

	return len;
}

Example #5

File: wavelan.c Project: Nurb432/plan9front

static int
w_alloc(Ctlr* ctlr, int len)
{
	int rc;
	int i,j;

	if(w_cmd(ctlr, WCmdMalloc, len)==0)
		for (i = 0; i<WTmOut; i++)
			if(csr_ins(ctlr, WR_EvSts) & WAllocEv){
				csr_ack(ctlr, WAllocEv);
				rc=csr_ins(ctlr, WR_Alloc);
				if(w_seek(ctlr, rc, 0, 0))
					return -1;
				len = len/2;
				for (j=0; j<len; j++)
					csr_outs(ctlr, WR_Data0, 0);
				return rc;
			}
	return -1;
}