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com_acpi.c revision 1.5 
      1 /* $NetBSD: com_acpi.c,v 1.5 2002/12/28 08:14:39 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 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: com_acpi.c,v 1.5 2002/12/28 08:14:39 jmcneill Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/systm.h>
     33 #include <sys/errno.h>
     34 #include <sys/ioctl.h>
     35 #include <sys/syslog.h>
     36 #include <sys/device.h>
     37 #include <sys/proc.h>
     38 #include <sys/termios.h>
     39 
     40 #include <machine/bus.h>
     41 
     42 #include <dev/isa/isavar.h>
     43 #include <dev/isa/isadmavar.h>
     44 
     45 #include <dev/acpi/acpica.h>
     46 #include <dev/acpi/acpireg.h>
     47 #include <dev/acpi/acpivar.h>
     48 
     49 #include <dev/ic/comvar.h>
     50 
     51 int	com_acpi_match(struct device *, struct cfdata *, void *);
     52 void	com_acpi_attach(struct device *, struct device *, void *);
     53 
     54 struct com_acpi_softc {
     55 	struct com_softc sc_com;
     56 	void *sc_ih;
     57 };
     58 
     59 CFATTACH_DECL(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match,
     60     com_acpi_attach, NULL, NULL);
     61 
     62 /*
     63  * Supported device IDs
     64  */
     65 
     66 static const char * const com_acpi_ids[] = {
     67 	"PNP0500",	/* Standard PC COM port */
     68 	"PNP0501",	/* 16550A-compatible COM port */
     69 	"PNP0510",	/* Generic IRDA-compatible device */
     70 	"PNP0511",	/* Generic IRDA-compatible device */
     71 	NULL
     72 };
     73 
     74 /*
     75  * com_acpi_match: autoconf(9) match routine
     76  */
     77 int
     78 com_acpi_match(struct device *parent, struct cfdata *match, void *aux)
     79 {
     80 	struct acpi_attach_args *aa = aux;
     81 	const char *id;
     82 	int i;
     83 
     84 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     85 		return 0;
     86 
     87 	for (i = 0; (id = com_acpi_ids[i]) != NULL; ++i) {
     88 		if (strcmp(aa->aa_node->ad_devinfo.HardwareId, id) == 0)
     89 			return 1;
     90 	}
     91 
     92 	/* No matches found */
     93 	return 0;
     94 }
     95 
     96 /*
     97  * com_acpi_attach: autoconf(9) attach routine
     98  */
     99 void
    100 com_acpi_attach(struct device *parent, struct device *self, void *aux)
    101 {
    102 	struct com_acpi_softc *asc = (struct com_acpi_softc *)self;
    103 	struct com_softc *sc = &asc->sc_com;
    104 	struct acpi_attach_args *aa = aux;
    105 	struct acpi_resources res;
    106 	struct acpi_io *io;
    107 	struct acpi_irq *irq;
    108 	ACPI_STATUS rv;
    109 
    110 	printf("\n");
    111 
    112 	/* parse resources */
    113 	rv = acpi_resource_parse(&sc->sc_dev, aa->aa_node, &res,
    114 	    &acpi_resource_parse_ops_default);
    115 	if (rv != AE_OK) {
    116 		printf("%s: unable to parse resources\n", sc->sc_dev.dv_xname);
    117 		return;
    118 	}
    119 
    120 	/* find our i/o registers */
    121 	io = acpi_res_io(&res, 0);
    122 	if (io == NULL) {
    123 		printf("%s: unable to find i/o register resource\n",
    124 		    sc->sc_dev.dv_xname);
    125 		return;
    126 	}
    127 
    128 	/* find our IRQ */
    129 	irq = acpi_res_irq(&res, 0);
    130 	if (irq == NULL) {
    131 		printf("%s: unable to find irq resource\n",
    132 		    sc->sc_dev.dv_xname);
    133 		return;
    134 	}
    135 
    136 	sc->sc_iot = aa->aa_iot;
    137 	if (!com_is_console(aa->aa_iot, io->ar_base, &sc->sc_ioh)) {
    138 		if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
    139 		    0, &sc->sc_ioh)) {
    140 			printf("%s: can't map i/o space\n",
    141 			    sc->sc_dev.dv_xname);
    142 			return;
    143 		}
    144 	}
    145 	sc->sc_iobase = io->ar_base;
    146 
    147 	printf("%s", sc->sc_dev.dv_xname);
    148 
    149 	if (comprobe1(sc->sc_iot, sc->sc_ioh) == 0) {
    150 		printf(": com probe failed\n");
    151 		return;
    152 	}
    153 
    154 	sc->sc_frequency = 115200 * 16;
    155 
    156 	com_attach_subr(sc);
    157 
    158 	asc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq, 0,
    159 					IPL_SERIAL, comintr, sc);
    160 }
    161