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      1 /*	$NetBSD: auxio_sbus.c,v 1.2 2023/12/20 05:33:58 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2000, 2001, 2015 Matthew R. Green
      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 ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * 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 
     29 /*
     30  * AUXIO registers support on the sbus & ebus2, used for the floppy driver
     31  * and to control the system LED, for the BLINK option.
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 __KERNEL_RCSID(0, "$NetBSD: auxio_sbus.c,v 1.2 2023/12/20 05:33:58 thorpej Exp $");
     36 
     37 #include "opt_auxio.h"
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/kernel.h>
     42 #include <sys/callout.h>
     43 #include <sys/errno.h>
     44 #include <sys/device.h>
     45 
     46 #include <machine/autoconf.h>
     47 #include <machine/cpu.h>
     48 
     49 #include <dev/ebus/ebusreg.h>
     50 #include <dev/ebus/ebusvar.h>
     51 #include <dev/sbus/sbusvar.h>
     52 #include <sparc64/dev/auxioreg.h>
     53 #include <sparc64/dev/auxiovar.h>
     54 
     55 static int	auxio_sbus_match(device_t, cfdata_t, void *);
     56 static void	auxio_sbus_attach(device_t, device_t, void *);
     57 
     58 CFATTACH_DECL_NEW(auxio_sbus, sizeof(struct auxio_softc),
     59     auxio_sbus_match, auxio_sbus_attach, NULL, NULL);
     60 
     61 static int
     62 auxio_sbus_match(device_t parent, cfdata_t cf, void *aux)
     63 {
     64 	struct sbus_attach_args *sa = aux;
     65 
     66 	return strcmp(AUXIO_ROM_NAME, sa->sa_name) == 0;
     67 }
     68 
     69 static void
     70 auxio_sbus_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct auxio_softc *sc = device_private(self);
     73 	struct sbus_attach_args *sa = aux;
     74 
     75 	sc->sc_dev = self;
     76 	sc->sc_tag = sa->sa_bustag;
     77 
     78 	if (sa->sa_nreg < 1) {
     79 		printf(": no registers??\n");
     80 		return;
     81 	}
     82 
     83 	if (sa->sa_nreg != 1) {
     84 		printf(": not 1 (%d/%d) registers??", sa->sa_nreg,
     85 		    sa->sa_npromvaddrs);
     86 		return;
     87 	}
     88 
     89 	/* sbus auxio only has one set of registers */
     90 	sc->sc_flags = AUXIO_LEDONLY;
     91 	if (sa->sa_npromvaddrs > 0) {
     92 		sbus_promaddr_to_handle(sc->sc_tag,
     93 			sa->sa_promvaddr, &sc->sc_led);
     94 	} else {
     95 		sbus_bus_map(sc->sc_tag, sa->sa_slot, sa->sa_offset,
     96 			sa->sa_size, 0, &sc->sc_led);
     97 	}
     98 
     99 	auxio_attach_common(sc);
    100 }
    101