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mpu_acpi.c revision 1.11 
      1 /* $NetBSD: mpu_acpi.c,v 1.11 2011/11/23 23:07:31 jmcneill Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2002 Jared D. McNeill <jmcneill (at) invisible.ca>
      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. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * ACPI mpu(4) attachment based in lpt_acpi.c by Jared D. McNeill.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: mpu_acpi.c,v 1.11 2011/11/23 23:07:31 jmcneill Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/device.h>
     37 #include <sys/systm.h>
     38 
     39 #include <dev/acpi/acpivar.h>
     40 
     41 #include <dev/ic/mpuvar.h>
     42 
     43 #include <dev/isa/isadmavar.h>
     44 
     45 static int	mpu_acpi_match(device_t, cfdata_t, void *);
     46 static void	mpu_acpi_attach(device_t, device_t, void *);
     47 
     48 struct mpu_acpi_softc {
     49 	struct mpu_softc sc_mpu;
     50 };
     51 
     52 CFATTACH_DECL_NEW(mpu_acpi, sizeof(struct mpu_acpi_softc), mpu_acpi_match,
     53     mpu_acpi_attach, NULL, NULL);
     54 
     55 /*
     56  * Supported device IDs
     57  */
     58 
     59 static const char * const mpu_acpi_ids[] = {
     60 	"PNPB006",	/* Roland MPU-401 (compatible) MIDI UART */
     61 	NULL
     62 };
     63 
     64 /*
     65  * mpu_acpi_match: autoconf(9) match routine
     66  */
     67 static int
     68 mpu_acpi_match(device_t parent, cfdata_t match, void *aux)
     69 {
     70 	struct acpi_attach_args *aa = aux;
     71 
     72 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     73 		return 0;
     74 
     75 	return acpi_match_hid(aa->aa_node->ad_devinfo, mpu_acpi_ids);
     76 }
     77 
     78 /*
     79  * mpu_acpi_attach: autoconf(9) attach routine
     80  */
     81 static void
     82 mpu_acpi_attach(device_t parent, device_t self, void *aux)
     83 {
     84 	struct mpu_acpi_softc *asc = device_private(self);
     85 	struct mpu_softc *sc = &asc->sc_mpu;
     86 	struct acpi_attach_args *aa = aux;
     87 	struct acpi_resources res;
     88 	struct acpi_io *io;
     89 	struct acpi_irq *irq;
     90 	ACPI_STATUS rv;
     91 
     92 	/* parse resources */
     93 	rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
     94 	    &res, &acpi_resource_parse_ops_default);
     95 	if (ACPI_FAILURE(rv))
     96 		return;
     97 
     98 	/* find our i/o registers */
     99 	io = acpi_res_io(&res, 0);
    100 	if (io == NULL) {
    101 		aprint_error_dev(self,
    102 		    "unable to find i/o register resource\n");
    103 		goto out;
    104 	}
    105 
    106 	/* find our IRQ */
    107 	irq = acpi_res_irq(&res, 0);
    108 	if (irq == NULL) {
    109 		aprint_error_dev(self, "unable to find irq resource\n");
    110 		goto out;
    111 	}
    112 
    113 	sc->iot = aa->aa_iot;
    114 	if (bus_space_map(sc->iot, io->ar_base, io->ar_length, 0, &sc->ioh)) {
    115 		aprint_error_dev(self, "can't map i/o space\n");
    116 		goto out;
    117 	}
    118 
    119 	sc->model = "Roland MPU-401 MIDI UART";
    120 	sc->sc_dev = self;
    121 	mpu_attach(sc);
    122 
    123 	sc->arg = isa_intr_establish(aa->aa_ic, irq->ar_irq,
    124 	    (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL,
    125 	    IPL_SCHED, mpu_intr, sc);
    126 
    127  out:
    128 	acpi_resource_cleanup(&res);
    129 }
    130