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      1 /*	$NetBSD: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: dma_obio.c,v 1.13 2023/12/20 05:33:18 thorpej Exp $");
     34 
     35 #include <sys/types.h>
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/kernel.h>
     39 #include <sys/errno.h>
     40 #include <sys/device.h>
     41 
     42 #include <sys/bus.h>
     43 #include <machine/autoconf.h>
     44 #include <machine/cpu.h>
     45 
     46 #include <dev/sbus/sbusvar.h>
     47 
     48 #include <dev/ic/lsi64854reg.h>
     49 #include <dev/ic/lsi64854var.h>
     50 
     51 int	dmamatch_obio(device_t, cfdata_t, void *);
     52 void	dmaattach_obio(device_t, device_t, void *);
     53 
     54 CFATTACH_DECL_NEW(dma_obio, sizeof(struct lsi64854_softc),
     55     dmamatch_obio, dmaattach_obio, NULL, NULL);
     56 
     57 int
     58 dmamatch_obio(device_t parent, cfdata_t cf, void *aux)
     59 {
     60 	union obio_attach_args *uoba = aux;
     61 	struct obio4_attach_args *oba;
     62 
     63 	if (uoba->uoba_isobio4 == 0)
     64 		return 0;
     65 
     66 	oba = &uoba->uoba_oba4;
     67 	return bus_space_probe(oba->oba_bustag, oba->oba_paddr,
     68 				4,	/* probe size */
     69 				0,	/* offset */
     70 				0,	/* flags */
     71 				NULL, NULL);
     72 }
     73 
     74 
     75 void
     76 dmaattach_obio(device_t parent, device_t self, void *aux)
     77 {
     78 	struct lsi64854_softc *sc = device_private(self);
     79 	union obio_attach_args *uoba = aux;
     80 	struct obio4_attach_args *oba = &uoba->uoba_oba4;
     81 
     82 	sc->sc_dev = self;
     83 	sc->sc_bustag = oba->oba_bustag;
     84 	sc->sc_dmatag = oba->oba_dmatag;
     85 
     86 	if (bus_space_map(oba->oba_bustag, oba->oba_paddr,
     87 			  4 * sizeof(uint32_t),
     88 			  0, &sc->sc_regs) != 0) {
     89 		aprint_error(": cannot map registers\n");
     90 		return;
     91 	}
     92 
     93 	/* Any point in setting `sc_burst' to anything here? */
     94 	sc->sc_channel = L64854_CHANNEL_SCSI;
     95 	lsi64854_attach(sc);
     96 }
     97