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      1 /*	$NetBSD: ssc.c,v 1.5 2016/05/13 13:40:55 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 Doug Rabson
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  *	$FreeBSD$
     29  */
     30 
     31 #include <sys/param.h>
     32 
     33 #include <machine/ssc.h>
     34 
     35 #include <dev/cons.h>
     36 
     37 
     38 #define	SSC_POLL_HZ	50
     39 
     40 void sscconsattach(device_t, device_t, void *);
     41 
     42 void ssccnprobe(struct consdev *);
     43 void ssccninit(struct consdev *);
     44 void ssccnputc(dev_t, int);
     45 int ssccngetc(dev_t);
     46 void ssccnpollc(dev_t, int);
     47 
     48 
     49 __attribute__((__noinline__))
     50 uint64_t
     51 ssc(uint64_t in0, uint64_t in1, uint64_t in2, uint64_t in3, int which)
     52 {
     53 	register uint64_t ret0 __asm("r8");
     54 
     55 	__asm __volatile("mov r15=%1\n\t"
     56 			 "break 0x80001"
     57 			 : "=r"(ret0)
     58 			 : "r"(which), "r"(in0), "r"(in1), "r"(in2), "r"(in3));
     59 	return ret0;
     60 }
     61 
     62 
     63 void
     64 sscconsattach(device_t parent, device_t self, void *aux)
     65 {
     66 	/* not yet */
     67 }
     68 
     69 void
     70 ssccnprobe(struct consdev *cp)
     71 {
     72 
     73 	cp->cn_dev = ~NODEV;		/* XXXX: And already exists */
     74 	cp->cn_pri = CN_INTERNAL;
     75 }
     76 
     77 void
     78 ssccninit(struct consdev *cp)
     79 {
     80 	/* nothing */
     81 }
     82 
     83 void
     84 ssccnputc(dev_t dev, int c)
     85 {
     86 
     87 	ssc(c, 0, 0, 0, SSC_PUTCHAR);
     88 }
     89 
     90 int
     91 ssccngetc(dev_t dev)
     92 {
     93 	int c;
     94 
     95 	do {
     96 		c = ssc(0, 0, 0, 0, SSC_GETCHAR);
     97 	} while (c == 0);
     98 
     99 	return c;
    100 }
    101 
    102 void
    103 ssccnpollc(dev_t dev, int on)
    104 {
    105 	/* nothing */
    106 }
    107 
    108 /* XXX: integrate the rest of the ssc.c stuff from FreeBSD to plug into wsdisplay */
    109