Home | History | Annotate | Line # | Download | only in acpi
plcom_acpi.c revision 1.3 
      1 /* $NetBSD: plcom_acpi.c,v 1.3 2020/04/25 21:34:26 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jared McNeill <jmcneill (at) invisible.ca>.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 __KERNEL_RCSID(0, "$NetBSD: plcom_acpi.c,v 1.3 2020/04/25 21:34:26 jmcneill Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/bus.h>
     37 #include <sys/cpu.h>
     38 #include <sys/device.h>
     39 #include <sys/termios.h>
     40 
     41 #include <dev/acpi/acpireg.h>
     42 #include <dev/acpi/acpivar.h>
     43 #include <dev/acpi/acpi_intr.h>
     44 
     45 #include <evbarm/dev/plcomreg.h>
     46 #include <evbarm/dev/plcomvar.h>
     47 
     48 static int	plcom_acpi_match(device_t, cfdata_t, void *);
     49 static void	plcom_acpi_attach(device_t, device_t, void *);
     50 
     51 CFATTACH_DECL_NEW(plcom_acpi, sizeof(struct plcom_softc), plcom_acpi_match, plcom_acpi_attach, NULL, NULL);
     52 
     53 static const char * const compatible[] = {
     54 	"ARMH0011",
     55 	NULL
     56 };
     57 
     58 static int
     59 plcom_acpi_match(device_t parent, cfdata_t cf, void *aux)
     60 {
     61 	struct acpi_attach_args *aa = aux;
     62 
     63 	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
     64 		return 0;
     65 
     66 	return acpi_match_hid(aa->aa_node->ad_devinfo, compatible);
     67 }
     68 
     69 static void
     70 plcom_acpi_attach(device_t parent, device_t self, void *aux)
     71 {
     72 	struct plcom_softc * const sc = device_private(self);
     73 	struct acpi_attach_args *aa = aux;
     74 	struct acpi_resources res;
     75 	struct acpi_mem *mem;
     76 	struct acpi_irq *irq;
     77 	ACPI_STATUS rv;
     78 	void *ih;
     79 
     80 	sc->sc_dev = self;
     81 
     82 	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
     83 	    &res, &acpi_resource_parse_ops_default);
     84 	if (ACPI_FAILURE(rv))
     85 		return;
     86 
     87 	mem = acpi_res_mem(&res, 0);
     88 	if (mem == NULL) {
     89 		aprint_error(": couldn't find mem resource\n");
     90 		goto done;
     91 	}
     92 
     93 	irq = acpi_res_irq(&res, 0);
     94 	if (irq == NULL) {
     95 		aprint_error(": couldn't find irq resource\n");
     96 		goto done;
     97 	}
     98 
     99 	sc->sc_hwflags = 0;
    100 	sc->sc_swflags = 0;
    101 
    102 	sc->sc_pi.pi_type = PLCOM_TYPE_PL011;
    103 	sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
    104 	sc->sc_pi.pi_iot = aa->aa_memt;
    105 	sc->sc_pi.pi_iobase = mem->ar_base;
    106 	if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, &sc->sc_pi.pi_ioh) != 0) {
    107 		aprint_error(": couldn't map registers\n");
    108 		goto done;
    109 	}
    110 
    111 	plcom_attach_subr(sc);
    112 
    113 	ih = acpi_intr_establish(self, (uint64_t)aa->aa_node->ad_handle,
    114 	    IPL_SERIAL, true, plcomintr, sc, device_xname(self));
    115 	if (ih == NULL) {
    116 		aprint_error_dev(self, "couldn't install interrupt handler\n");
    117 		return;
    118 	}
    119 
    120 done:
    121 	acpi_resource_cleanup(&res);
    122 }
    123