1/* $NetBSD: plcom_acpi.c,v 1.4 2023/01/24 06:56:40 mlelstv 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@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 1.4 2023/01/24 06:56:40 mlelstv 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 48static int plcom_acpi_match(device_t, cfdata_t, void *); 49static void plcom_acpi_attach(device_t, device_t, void *); 50 51CFATTACH_DECL_NEW(plcom_acpi, sizeof(struct plcom_softc), plcom_acpi_match, plcom_acpi_attach, NULL, NULL); 52 53enum plcom_acpi_variant { 54 PLCOM_ACPI_GENERIC, 55 PLCOM_ACPI_PL011, 56 PLCOM_ACPI_BCM2837 57}; 58 59static const struct device_compatible_entry compat_data[] = { 60 { .compat = "BCM2837", .value = PLCOM_ACPI_BCM2837 }, 61 { .compat = "ARMH0011", .value = PLCOM_ACPI_PL011 }, 62 { .compat = "ARMHB000", .value = PLCOM_ACPI_GENERIC }, 63 DEVICE_COMPAT_EOL 64}; 65 66static int 67plcom_acpi_match(device_t parent, cfdata_t cf, void *aux) 68{ 69 struct acpi_attach_args *aa = aux; 70 71 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 72 return 0; 73 74 return acpi_compatible_match(aa, compat_data); 75} 76 77static void 78plcom_acpi_attach(device_t parent, device_t self, void *aux) 79{ 80 struct plcom_softc * const sc = device_private(self); 81 struct acpi_attach_args *aa = aux; 82 struct acpi_resources res; 83 struct acpi_mem *mem; 84 struct acpi_irq *irq; 85 ACPI_STATUS rv; 86 void *ih; 87 88 sc->sc_dev = self; 89 90 rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 91 &res, &acpi_resource_parse_ops_default); 92 if (ACPI_FAILURE(rv)) 93 return; 94 95 mem = acpi_res_mem(&res, 0); 96 if (mem == NULL) { 97 aprint_error(": couldn't find mem resource\n"); 98 goto done; 99 } 100 101 irq = acpi_res_irq(&res, 0); 102 if (irq == NULL) { 103 aprint_error(": couldn't find irq resource\n"); 104 goto done; 105 } 106 107 sc->sc_hwflags = 0; 108 sc->sc_swflags = 0; 109 sc->sc_fifolen = 0; 110 sc->sc_pi.pi_type = PLCOM_TYPE_PL011; 111 sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS; 112 113 switch (acpi_compatible_lookup(aa, compat_data)->value) { 114 case PLCOM_ACPI_BCM2837: 115 sc->sc_fifolen = 16; 116 break; 117 case PLCOM_ACPI_GENERIC: 118 sc->sc_pi.pi_type = PLCOM_TYPE_GENERIC_UART; 119 break; 120 } 121 122 sc->sc_pi.pi_iot = aa->aa_memt; 123 sc->sc_pi.pi_iobase = mem->ar_base; 124 if (bus_space_map(aa->aa_memt, mem->ar_base, mem->ar_length, 0, &sc->sc_pi.pi_ioh) != 0) { 125 aprint_error(": couldn't map registers\n"); 126 goto done; 127 } 128 129 plcom_attach_subr(sc); 130 131 ih = acpi_intr_establish(self, (uint64_t)aa->aa_node->ad_handle, 132 IPL_SERIAL, true, plcomintr, sc, device_xname(self)); 133 if (ih == NULL) { 134 aprint_error_dev(self, "couldn't install interrupt handler\n"); 135 return; 136 } 137 138done: 139 acpi_resource_cleanup(&res); 140} 141