Home | History | Annotate | Line # | Download | only in acpi 
      1 /* $NetBSD: mpu_acpi.c,v 1.16 2021/01/29 15:49:55 thorpej 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 1.16 2021/01/29 15:49:55 thorpej 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 #include <dev/acpi/acpi_intr.h>
     41 
     42 #include <dev/ic/mpuvar.h>
     43 
     44 #include <dev/isa/isadmavar.h>
     45 
     46 static int	mpu_acpi_match(device_t, cfdata_t, void *);
     47 static void	mpu_acpi_attach(device_t, device_t, void *);
     48 
     49 struct mpu_acpi_softc {
     50 	struct mpu_softc sc_mpu;
     51 	kmutex_t sc_lock;
     52 };
     53 
     54 CFATTACH_DECL_NEW(mpu_acpi, sizeof(struct mpu_acpi_softc), mpu_acpi_match,
     55     mpu_acpi_attach, NULL, NULL);
     56 
     57 /*
     58  * Supported device IDs
     59  */
     60 
     61 static const struct device_compatible_entry compat_data[] = {
     62 	{ .compat = "PNPB006" }, /* Roland MPU-401 (compatible) MIDI UART */
     63 	DEVICE_COMPAT_EOL
     64 };
     65 
     66 /*
     67  * mpu_acpi_match: autoconf(9) match routine
     68  */
     69 static int
     70 mpu_acpi_match(device_t parent, cfdata_t match, void *aux)
     71 {
     72 	struct acpi_attach_args *aa = aux;
     73 
     74 	return acpi_compatible_match(aa, compat_data);
     75 }
     76 
     77 /*
     78  * mpu_acpi_attach: autoconf(9) attach routine
     79  */
     80 static void
     81 mpu_acpi_attach(device_t parent, device_t self, void *aux)
     82 {
     83 	struct mpu_acpi_softc *asc = device_private(self);
     84 	struct mpu_softc *sc = &asc->sc_mpu;
     85 	struct acpi_attach_args *aa = aux;
     86 	struct acpi_resources res;
     87 	struct acpi_io *io;
     88 	ACPI_STATUS rv;
     89 
     90 	/* parse resources */
     91 	rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS",
     92 	    &res, &acpi_resource_parse_ops_default);
     93 	if (ACPI_FAILURE(rv))
     94 		return;
     95 
     96 	/* find our i/o registers */
     97 	io = acpi_res_io(&res, 0);
     98 	if (io == NULL) {
     99 		aprint_error_dev(self,
    100 		    "unable to find i/o register resource\n");
    101 		goto out;
    102 	}
    103 
    104 	sc->iot = aa->aa_iot;
    105 	if (bus_space_map(sc->iot, io->ar_base, io->ar_length, 0, &sc->ioh)) {
    106 		aprint_error_dev(self, "can't map i/o space\n");
    107 		goto out;
    108 	}
    109 
    110 	sc->model = "Roland MPU-401 MIDI UART";
    111 	sc->sc_dev = self;
    112 	sc->lock = &asc->sc_lock;
    113 	mutex_init(&asc->sc_lock, MUTEX_DEFAULT, IPL_AUDIO);
    114 	mpu_attach(sc);
    115 
    116 	sc->arg = acpi_intr_establish(self,
    117 	    (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
    118 	    IPL_AUDIO, true, mpu_intr, sc, device_xname(self));
    119 	if (sc->arg == NULL) {
    120 		aprint_error_dev(self, "unable to establish interrupt\n");
    121 		goto out;
    122 	}
    123 
    124  out:
    125 	acpi_resource_cleanup(&res);
    126 }
    127