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      1 /* $NetBSD: attimer_acpi.c,v 1.15 2021/01/29 15:49:55 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 Quentin Garnier.
      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 /*
     33  * Copyright (c) 2002 Jared D. McNeill <jmcneill (at) invisible.ca>
     34  * All rights reserved.
     35  *
     36  * Redistribution and use in source and binary forms, with or without
     37  * modification, are permitted provided that the following conditions
     38  * are met:
     39  * 1. Redistributions of source code must retain the above copyright
     40  *    notice, this list of conditions and the following disclaimer.
     41  * 2. The name of the author may not be used to endorse or promote products
     42  *    derived from this software without specific prior written permission.
     43  *
     44  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     45  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     46  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     47  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     48  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     49  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     50  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     51  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     52  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     54  * SUCH DAMAGE.
     55  */
     56 
     57 /*
     58  * ACPI attimer(4) attachment based on lpt_acpi.c by Jared D. McNeill.
     59  */
     60 
     61 #include <sys/cdefs.h>
     62 __KERNEL_RCSID(0, "$NetBSD: attimer_acpi.c,v 1.15 2021/01/29 15:49:55 thorpej Exp $");
     63 
     64 #include <sys/param.h>
     65 #include <sys/device.h>
     66 #include <sys/systm.h>
     67 
     68 #include <dev/acpi/acpivar.h>
     69 
     70 #include <dev/ic/attimervar.h>
     71 
     72 static int	attimer_acpi_match(device_t, cfdata_t, void *);
     73 static void	attimer_acpi_attach(device_t, device_t, void *);
     74 
     75 CFATTACH_DECL3_NEW(attimer_acpi, sizeof(struct attimer_softc),
     76     attimer_acpi_match, attimer_acpi_attach, attimer_detach, NULL, NULL, NULL,
     77     DVF_DETACH_SHUTDOWN);
     78 
     79 /*
     80  * Supported device IDs
     81  */
     82 
     83 static const struct device_compatible_entry compat_data[] = {
     84 	{ .compat = "PNP0100" },	/* AT Timer */
     85 	DEVICE_COMPAT_EOL
     86 };
     87 
     88 /*
     89  * attimer_acpi_match: autoconf(9) match routine
     90  */
     91 static int
     92 attimer_acpi_match(device_t parent, cfdata_t match, void *aux)
     93 {
     94 	struct acpi_attach_args *aa = aux;
     95 
     96 	return acpi_compatible_match(aa, compat_data);
     97 }
     98 
     99 /*
    100  * attimer_acpi_attach: autoconf(9) attach routine
    101  */
    102 static void
    103 attimer_acpi_attach(device_t parent, device_t self, void *aux)
    104 {
    105 	struct attimer_softc *sc = device_private(self);
    106 	struct acpi_attach_args *aa = aux;
    107 	struct acpi_resources res;
    108 	struct acpi_io *io;
    109 	ACPI_STATUS rv;
    110 
    111 	sc->sc_dev = self;
    112 
    113 	/* parse resources */
    114 	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
    115 	    &res, &acpi_resource_parse_ops_default);
    116 	if (ACPI_FAILURE(rv))
    117 		return;
    118 
    119 	/* find our i/o registers */
    120 	io = acpi_res_io(&res, 0);
    121 	if (io == NULL) {
    122 		aprint_error_dev(self,
    123 		    "unable to find i/o register resource\n");
    124 		goto out;
    125 	}
    126 
    127 	sc->sc_iot = aa->aa_iot;
    128 	sc->sc_size = io->ar_length;
    129 	if (bus_space_map(sc->sc_iot, io->ar_base, sc->sc_size,
    130 		    0, &sc->sc_ioh) != 0) {
    131 		aprint_error_dev(self, "can't map i/o space\n");
    132 		goto out;
    133 	}
    134 
    135 	attimer_attach(sc);
    136 
    137  out:
    138 	acpi_resource_cleanup(&res);
    139 }
    140