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lpt_acpi.c revision 1.22 
      1 /* $NetBSD: lpt_acpi.c,v 1.22 2020/12/07 10:02:51 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: lpt_acpi.c,v 1.22 2020/12/07 10:02:51 jmcneill Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/device.h>
     33 #include <sys/termios.h>
     34 #include <sys/systm.h>
     35 
     36 #include <dev/acpi/acpivar.h>
     37 #include <dev/acpi/acpi_intr.h>
     38 
     39 #include <dev/ic/lptvar.h>
     40 
     41 #include <dev/isa/isadmavar.h>
     42 
     43 static int	lpt_acpi_match(device_t, cfdata_t, void *);
     44 static void	lpt_acpi_attach(device_t, device_t, void *);
     45 
     46 struct lpt_acpi_softc {
     47 	struct lpt_softc sc_lpt;
     48 };
     49 
     50 CFATTACH_DECL_NEW(lpt_acpi, sizeof(struct lpt_acpi_softc), lpt_acpi_match,
     51     lpt_acpi_attach, NULL, NULL);
     52 
     53 /*
     54  * Supported device IDs
     55  */
     56 
     57 static const char * const lpt_acpi_ids[] = {
     58 	"PNP04??",	/* Standard LPT printer port */
     59 	NULL
     60 };
     61 
     62 /*
     63  * lpt_acpi_match: autoconf(9) match routine
     64  */
     65 static int
     66 lpt_acpi_match(device_t parent, cfdata_t match, void *aux)
     67 {
     68 	struct acpi_attach_args *aa = aux;
     69 
     70 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     71 		return 0;
     72 
     73 	return acpi_match_hid(aa->aa_node->ad_devinfo, lpt_acpi_ids);
     74 }
     75 
     76 /*
     77  * lpt_acpi_attach: autoconf(9) attach routine
     78  */
     79 static void
     80 lpt_acpi_attach(device_t parent, device_t self, void *aux)
     81 {
     82 	struct lpt_acpi_softc *asc = device_private(self);
     83 	struct lpt_softc *sc = &asc->sc_lpt;
     84 	struct acpi_attach_args *aa = aux;
     85 	struct acpi_resources res;
     86 	struct acpi_io *io;
     87 	ACPI_STATUS rv;
     88 
     89 	sc->sc_dev = self;
     90 
     91 	if (!pmf_device_register(self, NULL, NULL))
     92 		aprint_error_dev(self, "couldn't establish power handler\n");
     93 
     94 	/* parse resources */
     95 	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
     96 	    &res, &acpi_resource_parse_ops_default);
     97 	if (ACPI_FAILURE(rv))
     98 		return;
     99 
    100 	/* find our i/o registers */
    101 	io = acpi_res_io(&res, 0);
    102 	if (io == NULL) {
    103 		aprint_error_dev(self,
    104 		    "unable to find i/o register resource\n");
    105 		goto out;
    106 	}
    107 
    108 	sc->sc_iot = aa->aa_iot;
    109 	if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
    110 		    0, &sc->sc_ioh)) {
    111 		aprint_error_dev(self, "can't map i/o space\n");
    112 		goto out;
    113 	}
    114 
    115 	lpt_attach_subr(sc);
    116 
    117 	sc->sc_ih = acpi_intr_establish(self,
    118 	    (uint64_t)(uintptr_t)aa->aa_node->ad_handle,
    119 	    IPL_TTY, false, lptintr, sc, device_xname(self));
    120 	if (sc->sc_ih == NULL) {
    121 		aprint_error_dev(self, "unable to establish interrupt\n");
    122 		goto out;
    123 	}
    124 
    125  out:
    126 	acpi_resource_cleanup(&res);
    127 }
    128