Home | History | Annotate | Line # | Download | only in isa 
      1 /*	$NetBSD: tsdio.c,v 1.13 2021/08/07 16:19:12 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2005 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jesse Off
      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: tsdio.c,v 1.13 2021/08/07 16:19:12 thorpej 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/isa/isareg.h>
     43 #include <dev/isa/isavar.h>
     44 #include <dev/isa/isadmavar.h>
     45 #include <dev/isa/tsdiovar.h>
     46 
     47 int	tsdio_probe(device_t, cfdata_t, void *);
     48 void	tsdio_attach(device_t, device_t, void *);
     49 int	tsdio_search(device_t, cfdata_t, const int *, void *);
     50 int	tsdio_print(void *, const char *);
     51 
     52 CFATTACH_DECL_NEW(tsdio, sizeof(struct tsdio_softc),
     53     tsdio_probe, tsdio_attach, NULL, NULL);
     54 
     55 int
     56 tsdio_probe(device_t parent, cfdata_t cf, void *aux)
     57 {
     58 	struct isa_attach_args *ia = aux;
     59 	bus_space_tag_t iot = ia->ia_iot;
     60 	bus_space_handle_t dioh;
     61 	int rv = 0, have_io = 0;
     62 
     63 	if (ia->ia_nio < 1)
     64 		return (0);
     65 	if (ia->ia_nirq < 1)
     66 		return (0);
     67 
     68 	if (ISA_DIRECT_CONFIG(ia))
     69 		return (0);
     70 
     71 	/*
     72 	 * Disallow wildcarded I/O base.
     73 	 */
     74 	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
     75 		return (0);
     76 
     77 	/*
     78 	 * Map the I/O space.
     79 	 */
     80 	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8,
     81 	    0, &dioh))
     82 		goto out;
     83 	have_io = 1;
     84 
     85 	if (bus_space_read_1(ia->ia_iot, dioh, 0) != 0x54) {
     86 		goto out;
     87 	}
     88 
     89 	rv = 1;
     90 	ia->ia_nio = 1;
     91 	ia->ia_io[0].ir_size = 8;
     92 	ia->ia_niomem = 0;
     93 	ia->ia_nirq = 0;
     94 	ia->ia_ndrq = 0;
     95 
     96  out:
     97 	if (have_io)
     98 		bus_space_unmap(iot, dioh, 8);
     99 
    100 	return (rv);
    101 }
    102 
    103 void
    104 tsdio_attach(device_t parent, device_t self, void *aux)
    105 {
    106 	struct tsdio_softc *sc = device_private(self);
    107 	struct isa_attach_args *ia = aux;
    108 
    109 	sc->sc_iot = ia->ia_iot;
    110 
    111 	aprint_normal(": Technologic Systems TS-DIO24\n");
    112 
    113 	/*
    114 	 * Map the device.
    115 	 */
    116 	if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, 8,
    117 	    0, &sc->sc_ioh)) {
    118 		aprint_error_dev(self, "unable to map i/o space\n");
    119 		return;
    120 	}
    121 
    122 	/*
    123 	 *  Attach sub-devices
    124 	 */
    125 	config_search(self, NULL,
    126 	    CFARGS(.search = tsdio_search));
    127 }
    128 
    129 int
    130 tsdio_search(device_t parent, cfdata_t cf, const int *l, void *aux)
    131 {
    132 	struct tsdio_softc *sc = device_private(parent);
    133 	struct tsdio_attach_args sa;
    134 
    135 	sa.ta_iot = sc->sc_iot;
    136 	sa.ta_ioh = sc->sc_ioh;
    137 
    138 	if (config_probe(parent, cf, &sa))
    139 		config_attach(parent, cf, &sa, tsdio_print, CFARGS_NONE);
    140 
    141 	return (0);
    142 }
    143 
    144 int
    145 tsdio_print(void *aux, const char *name)
    146 {
    147 
    148 	return (UNCONF);
    149 }
    150