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      1 /*	$NetBSD: aha_isa.c,v 1.30 2014/10/18 08:33:28 snj 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 Charles M. Hannum.
      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: aha_isa.c,v 1.30 2014/10/18 08:33:28 snj Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/device.h>
     38 
     39 #include <sys/bus.h>
     40 #include <sys/intr.h>
     41 
     42 #include <dev/scsipi/scsi_all.h>
     43 #include <dev/scsipi/scsipi_all.h>
     44 #include <dev/scsipi/scsiconf.h>
     45 
     46 #include <dev/isa/isavar.h>
     47 #include <dev/isa/isadmavar.h>
     48 
     49 #include <dev/ic/ahareg.h>
     50 #include <dev/ic/ahavar.h>
     51 
     52 #define	AHA_ISA_IOSIZE	4
     53 
     54 static int	aha_isa_probe(device_t, cfdata_t, void *);
     55 static void	aha_isa_attach(device_t, device_t, void *);
     56 
     57 CFATTACH_DECL_NEW(aha_isa, sizeof(struct aha_softc),
     58     aha_isa_probe, aha_isa_attach, NULL, NULL);
     59 
     60 /*
     61  * Check the slots looking for a board we recognise
     62  * If we find one, note its address (slot) and call
     63  * the actual probe routine to check it out.
     64  */
     65 int
     66 aha_isa_probe(device_t parent, cfdata_t match, void *aux)
     67 {
     68 	struct isa_attach_args *ia = aux;
     69 	bus_space_tag_t iot = ia->ia_iot;
     70 	bus_space_handle_t ioh;
     71 	struct aha_probe_data apd;
     72 	int rv;
     73 
     74 	if (ia->ia_nio < 1)
     75 		return (0);
     76 	if (ia->ia_nirq < 1)
     77 		return (0);
     78 	if (ia->ia_ndrq < 1)
     79 		return (0);
     80 
     81 	if (ISA_DIRECT_CONFIG(ia))
     82 		return (0);
     83 
     84 	/* Disallow wildcarded i/o address. */
     85 	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
     86 		return (0);
     87 
     88 	if (bus_space_map(iot, ia->ia_io[0].ir_addr, AHA_ISA_IOSIZE, 0, &ioh))
     89 		return (0);
     90 
     91 	rv = aha_find(iot, ioh, &apd);
     92 
     93 	bus_space_unmap(iot, ioh, AHA_ISA_IOSIZE);
     94 
     95 	if (rv) {
     96 		if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
     97 		    ia->ia_irq[0].ir_irq != apd.sc_irq)
     98 			return (0);
     99 		if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ &&
    100 		    ia->ia_drq[0].ir_drq != apd.sc_drq)
    101 			return (0);
    102 
    103 		ia->ia_nio = 1;
    104 		ia->ia_io[0].ir_size = AHA_ISA_IOSIZE;
    105 
    106 		ia->ia_nirq = 1;
    107 		ia->ia_irq[0].ir_irq = apd.sc_irq;
    108 
    109 		ia->ia_ndrq = 1;
    110 		ia->ia_drq[0].ir_drq = apd.sc_drq;
    111 
    112 		ia->ia_niomem = 0;
    113 	}
    114 	return (rv);
    115 }
    116 
    117 /*
    118  * Attach all the sub-devices we can find
    119  */
    120 void
    121 aha_isa_attach(device_t parent, device_t self, void *aux)
    122 {
    123 	struct isa_attach_args *ia = aux;
    124 	struct aha_softc *sc = device_private(self);
    125 	bus_space_tag_t iot = ia->ia_iot;
    126 	bus_space_handle_t ioh;
    127 	struct aha_probe_data apd;
    128 	isa_chipset_tag_t ic = ia->ia_ic;
    129 	int error;
    130 
    131 	sc->sc_dev = self;
    132 
    133 	printf("\n");
    134 
    135 	if (bus_space_map(iot, ia->ia_io[0].ir_addr, AHA_ISA_IOSIZE, 0, &ioh)) {
    136 		aprint_error_dev(self, "can't map i/o space\n");
    137 		return;
    138 	}
    139 
    140 	sc->sc_iot = iot;
    141 	sc->sc_ioh = ioh;
    142 	sc->sc_dmat = ia->ia_dmat;
    143 	if (!aha_find(iot, ioh, &apd)) {
    144 		aprint_error_dev(self, "aha_find failed\n");
    145 		return;
    146 	}
    147 
    148 	if (apd.sc_drq != -1) {
    149 		if ((error = isa_dmacascade(ic, apd.sc_drq)) != 0) {
    150 			aprint_error_dev(self,
    151 			    "unable to cascade DRQ, error = %d\n", error);
    152 			return;
    153 		}
    154 	}
    155 
    156 	sc->sc_ih = isa_intr_establish(ic, apd.sc_irq, IST_EDGE, IPL_BIO,
    157 	    aha_intr, sc);
    158 	if (sc->sc_ih == NULL) {
    159 		aprint_error_dev(self, "couldn't establish interrupt\n");
    160 		return;
    161 	}
    162 
    163 	aha_attach(sc, &apd);
    164 }
    165