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com_acpi.c revision 1.27.4.2 
      1 /* $NetBSD: com_acpi.c,v 1.27.4.2 2009/07/18 14:52:59 yamt 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 1.27.4.2 2009/07/18 14:52:59 yamt 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 <sys/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 static int	com_acpi_match(device_t, cfdata_t , void *);
     52 static void	com_acpi_attach(device_t, device_t, void *);
     53 
     54 struct com_acpi_softc {
     55 	struct com_softc sc_com;
     56 	void *sc_ih;
     57 };
     58 
     59 CFATTACH_DECL_NEW(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match,
     60     com_acpi_attach, NULL, com_activate);
     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 	"IBM0071",	/* IBM ThinkPad IRDA device */
     72 	"SMCF010",	/* SMC SuperIO IRDA device */
     73 	"NSC6001",	/* NSC IRDA device */
     74 	"FUJ02E6",	/* Fujitsu Serial Pen Tablet */
     75 	NULL
     76 };
     77 
     78 /*
     79  * com_acpi_match: autoconf(9) match routine
     80  */
     81 static int
     82 com_acpi_match(device_t parent, cfdata_t match, void *aux)
     83 {
     84 	struct acpi_attach_args *aa = aux;
     85 
     86 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     87 		return 0;
     88 
     89 	return acpi_match_hid(aa->aa_node->ad_devinfo,com_acpi_ids);
     90 }
     91 
     92 /*
     93  * com_acpi_attach: autoconf(9) attach routine
     94  */
     95 static void
     96 com_acpi_attach(device_t parent, device_t self, void *aux)
     97 {
     98 	struct com_acpi_softc *asc = device_private(self);
     99 	struct com_softc *sc = &asc->sc_com;
    100 	struct acpi_attach_args *aa = aux;
    101 	struct acpi_resources res;
    102 	struct acpi_io *io;
    103 	struct acpi_mem *mem;
    104 	struct acpi_irq *irq;
    105 	bus_space_tag_t iot;
    106 	bus_space_handle_t ioh;
    107 	bus_addr_t base;
    108 	bus_size_t size;
    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 		iot = aa->aa_iot;
    123 		base = io->ar_base;
    124 		size = io->ar_length;
    125 	} else {
    126 		mem = acpi_res_mem(&res, 0);
    127 		if (mem != NULL) {
    128 			iot = aa->aa_memt;
    129 			base = mem->ar_base;
    130 			size = mem->ar_length;
    131 		} else {
    132 			aprint_error_dev(self,
    133 			    "unable to find i/o register and memory resource\n");
    134 			goto out;
    135 		}
    136 	}
    137 
    138 	/* find our IRQ */
    139 	irq = acpi_res_irq(&res, 0);
    140 	if (irq == NULL) {
    141 		aprint_error_dev(self, "unable to find irq resource\n");
    142 		goto out;
    143 	}
    144 
    145 	if (!com_is_console(iot, base, &ioh))
    146 		if (bus_space_map(iot, base, size, 0, &ioh)) {
    147 			aprint_error_dev(self, "can't map i/o space\n");
    148 			goto out;
    149 		}
    150 	COM_INIT_REGS(sc->sc_regs, iot, ioh, base);
    151 
    152 	aprint_normal("%s", device_xname(self));
    153 
    154 	if (com_probe_subr(&sc->sc_regs) == 0) {
    155 		aprint_error(": com probe failed\n");
    156 		goto out;
    157 	}
    158 
    159 	sc->sc_frequency = 115200 * 16;
    160 
    161 	com_attach_subr(sc);
    162 
    163 	asc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq,
    164 	    (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL,
    165 	    IPL_SERIAL, comintr, sc);
    166 
    167 	if (!pmf_device_register(self, NULL, com_resume))
    168 		aprint_error_dev(self, "couldn't establish a power handler\n");
    169 
    170  out:
    171 	acpi_resource_cleanup(&res);
    172 }
    173