1 /* $NetBSD: com_acpi.c,v 1.40 2019/03/01 09:21:06 mlelstv Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Jared D. McNeill <jmcneill@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 1.40 2019/03/01 09:21:06 mlelstv Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/device.h> 33 #include <sys/systm.h> 34 #include <sys/termios.h> 35 36 #include <dev/acpi/acpivar.h> 37 #include <dev/acpi/acpi_intr.h> 38 39 #include <dev/ic/comvar.h> 40 41 static int com_acpi_match(device_t, cfdata_t , void *); 42 static void com_acpi_attach(device_t, device_t, void *); 43 44 struct com_acpi_softc { 45 struct com_softc sc_com; 46 void *sc_ih; 47 }; 48 49 CFATTACH_DECL_NEW(com_acpi, sizeof(struct com_acpi_softc), com_acpi_match, 50 com_acpi_attach, NULL, NULL); 51 52 /* 53 * Supported device IDs 54 */ 55 56 static const char * const com_acpi_ids[] = { 57 "PNP0500", /* Standard PC COM port */ 58 "PNP0501", /* 16550A-compatible COM port */ 59 "PNP0510", /* Generic IRDA-compatible device */ 60 "PNP0511", /* Generic IRDA-compatible device */ 61 "IBM0071", /* IBM ThinkPad IRDA device */ 62 "SMCF010", /* SMC SuperIO IRDA device */ 63 "NSC6001", /* NSC IRDA device */ 64 "FUJ02E6", /* Fujitsu Serial Pen Tablet */ 65 "HISI0031", /* Hisilicon UART */ 66 "8250dw", /* Designware APB UART */ 67 NULL 68 }; 69 70 /* 71 * Subset of supported device IDs of type COM_TYPE_DW_APB 72 */ 73 static const char * const com_acpi_dw_ids[] = { 74 "HISI0031", /* Hisilicon UART */ 75 "8250dw", /* Designware APB UART */ 76 NULL 77 }; 78 79 /* 80 * com_acpi_match: autoconf(9) match routine 81 */ 82 static int 83 com_acpi_match(device_t parent, cfdata_t match, void *aux) 84 { 85 struct acpi_attach_args *aa = aux; 86 87 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 88 return 0; 89 90 return acpi_match_hid(aa->aa_node->ad_devinfo, com_acpi_ids); 91 } 92 93 /* 94 * com_acpi_attach: autoconf(9) attach routine 95 */ 96 static void 97 com_acpi_attach(device_t parent, device_t self, void *aux) 98 { 99 struct com_acpi_softc *asc = device_private(self); 100 struct com_softc *sc = &asc->sc_com; 101 struct acpi_attach_args *aa = aux; 102 struct acpi_resources res; 103 struct acpi_io *io; 104 struct acpi_mem *mem; 105 struct acpi_irq *irq; 106 bus_space_tag_t iot; 107 bus_space_handle_t ioh; 108 bus_addr_t base; 109 bus_size_t size; 110 ACPI_STATUS rv; 111 ACPI_INTEGER clock_freq; 112 113 sc->sc_dev = self; 114 115 /* parse resources */ 116 rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 117 &res, &acpi_resource_parse_ops_default); 118 if (ACPI_FAILURE(rv)) 119 return; 120 121 /* find our i/o registers */ 122 io = acpi_res_io(&res, 0); 123 if (io != NULL) { 124 iot = aa->aa_iot; 125 base = io->ar_base; 126 size = io->ar_length; 127 } else { 128 mem = acpi_res_mem(&res, 0); 129 if (mem != NULL) { 130 iot = aa->aa_memt; 131 base = mem->ar_base; 132 size = mem->ar_length; 133 } else { 134 aprint_error_dev(self, "unable to find i/o register " 135 "and memory resource\n"); 136 goto out; 137 } 138 } 139 140 /* find our IRQ */ 141 irq = acpi_res_irq(&res, 0); 142 if (irq == NULL) { 143 aprint_error_dev(self, "unable to find irq resource\n"); 144 goto out; 145 } 146 147 if (!com_is_console(iot, base, &ioh)) 148 if (bus_space_map(iot, base, size, 0, &ioh)) { 149 aprint_error_dev(self, "can't map i/o space\n"); 150 goto out; 151 } 152 com_init_regs(&sc->sc_regs, iot, ioh, base); 153 154 aprint_normal("%s", device_xname(self)); 155 156 if (acpi_match_hid(aa->aa_node->ad_devinfo, com_acpi_dw_ids) != 0) { 157 sc->sc_type = COM_TYPE_DW_APB; 158 SET(sc->sc_hwflags, COM_HW_POLL); /* XXX */ 159 } else { 160 if (com_probe_subr(&sc->sc_regs) == 0) { 161 aprint_error(": com probe failed\n"); 162 goto out; 163 } 164 } 165 166 rv = acpi_dsd_integer(aa->aa_node->ad_handle, "clock-frequency", 167 &clock_freq); 168 if (ACPI_SUCCESS(rv)) 169 sc->sc_frequency = clock_freq; 170 else 171 sc->sc_frequency = 115200 * 16; 172 173 com_attach_subr(sc); 174 175 if (!ISSET(sc->sc_hwflags, COM_HW_POLL)) 176 asc->sc_ih = acpi_intr_establish(self, 177 (uint64_t)(uintptr_t)aa->aa_node->ad_handle, 178 IPL_SERIAL, true, comintr, sc, device_xname(self)); 179 180 if (!pmf_device_register(self, NULL, com_resume)) 181 aprint_error_dev(self, "couldn't establish a power handler\n"); 182 goto cleanup; 183 184 /* 185 * In case of irq resource or i/o space mapping error, just set 186 * a NULL power handler. This may allow us to sleep later on. 187 */ 188 out: 189 if (!pmf_device_register(self, NULL, NULL)) 190 aprint_error_dev(self, "couldn't establish a power handler\n"); 191 192 cleanup: 193 acpi_resource_cleanup(&res); 194 } 195