1 /* $NetBSD: com_acpi.c,v 1.44 2021/10/23 17:46:26 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: com_acpi.c,v 1.44 2021/10/23 17:46:26 jmcneill 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 struct device_compatible_entry compat_data[] = { 57 /* Standard PC COM port */ 58 { .compat = "PNP0500", .value = COM_TYPE_NORMAL }, 59 60 /* 16550A-compatible COM port */ 61 { .compat = "PNP0501", .value = COM_TYPE_NORMAL }, 62 63 /* Generic IRDA-compatible device */ 64 { .compat = "PNP0510", .value = COM_TYPE_NORMAL }, 65 66 /* Generic IRDA-compatible device */ 67 { .compat = "PNP0511", .value = COM_TYPE_NORMAL }, 68 69 /* IBM ThinkPad IRDA device */ 70 { .compat = "IBM0071", .value = COM_TYPE_NORMAL }, 71 72 /* SMC SuperIO IRDA device */ 73 { .compat = "SMCF010", .value = COM_TYPE_NORMAL }, 74 75 /* NSC IRDA device */ 76 { .compat = "NSC6001", .value = COM_TYPE_NORMAL }, 77 78 /* Fujitsu Serial Pen Tablet */ 79 { .compat = "FUJ02E6", .value = COM_TYPE_NORMAL }, 80 81 /* Hisilicon UART */ 82 { .compat = "HISI0031", .value = COM_TYPE_DW_APB }, 83 84 /* Designware APB UART */ 85 { .compat = "8250dw", .value = COM_TYPE_DW_APB }, 86 87 DEVICE_COMPAT_EOL 88 }; 89 90 /* 91 * com_acpi_match: autoconf(9) match routine 92 */ 93 static int 94 com_acpi_match(device_t parent, cfdata_t match, void *aux) 95 { 96 struct acpi_attach_args *aa = aux; 97 98 return acpi_compatible_match(aa, compat_data); 99 } 100 101 /* 102 * com_acpi_attach: autoconf(9) attach routine 103 */ 104 static void 105 com_acpi_attach(device_t parent, device_t self, void *aux) 106 { 107 struct com_acpi_softc *asc = device_private(self); 108 struct com_softc *sc = &asc->sc_com; 109 struct acpi_attach_args *aa = aux; 110 const struct device_compatible_entry *dce; 111 struct acpi_resources res; 112 struct acpi_io *io; 113 struct acpi_mem *mem; 114 struct acpi_irq *irq; 115 bus_space_tag_t iot; 116 bus_space_handle_t ioh; 117 bus_addr_t base; 118 bus_size_t size; 119 ACPI_STATUS rv; 120 ACPI_INTEGER clock_freq; 121 ACPI_INTEGER reg_shift; 122 123 sc->sc_dev = self; 124 125 /* parse resources */ 126 rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS", 127 &res, &acpi_resource_parse_ops_default); 128 if (ACPI_FAILURE(rv)) 129 return; 130 131 /* find our i/o registers */ 132 io = acpi_res_io(&res, 0); 133 if (io != NULL) { 134 iot = aa->aa_iot; 135 base = io->ar_base; 136 size = io->ar_length; 137 } else { 138 mem = acpi_res_mem(&res, 0); 139 if (mem != NULL) { 140 iot = aa->aa_memt; 141 base = mem->ar_base; 142 size = mem->ar_length; 143 } else { 144 aprint_error_dev(self, "unable to find i/o register " 145 "and memory resource\n"); 146 goto out; 147 } 148 } 149 150 /* find our IRQ */ 151 irq = acpi_res_irq(&res, 0); 152 if (irq == NULL) { 153 sc->sc_poll_ticks = 1; 154 } 155 156 if (!com_is_console(iot, base, &ioh)) 157 if (bus_space_map(iot, base, size, 0, &ioh)) { 158 aprint_error_dev(self, "can't map i/o space\n"); 159 goto out; 160 } 161 162 rv = acpi_dsd_integer(aa->aa_node->ad_handle, "reg-shift", 163 ®_shift); 164 if (ACPI_FAILURE(rv)) { 165 reg_shift = 0; 166 } 167 168 com_init_regs_stride(&sc->sc_regs, iot, ioh, base, reg_shift); 169 170 aprint_normal("%s", device_xname(self)); 171 172 dce = acpi_compatible_lookup(aa, compat_data); 173 KASSERT(dce != NULL); 174 175 sc->sc_type = dce->value; 176 177 if (com_probe_subr(&sc->sc_regs) == 0) { 178 aprint_error(": com probe failed\n"); 179 goto out; 180 } 181 182 rv = acpi_dsd_integer(aa->aa_node->ad_handle, "clock-frequency", 183 &clock_freq); 184 if (ACPI_SUCCESS(rv)) 185 sc->sc_frequency = clock_freq; 186 else 187 sc->sc_frequency = 115200 * 16; 188 189 com_attach_subr(sc); 190 191 if (sc->sc_poll_ticks == 0) { 192 asc->sc_ih = acpi_intr_establish(self, 193 (uint64_t)(uintptr_t)aa->aa_node->ad_handle, 194 IPL_SERIAL, true, comintr, sc, device_xname(self)); 195 } 196 197 if (!pmf_device_register(self, NULL, com_resume)) 198 aprint_error_dev(self, "couldn't establish a power handler\n"); 199 goto cleanup; 200 201 /* 202 * In case of irq resource or i/o space mapping error, just set 203 * a NULL power handler. This may allow us to sleep later on. 204 */ 205 out: 206 if (!pmf_device_register(self, NULL, NULL)) 207 aprint_error_dev(self, "couldn't establish a power handler\n"); 208 209 cleanup: 210 acpi_resource_cleanup(&res); 211 } 212
Indexes created Sat Sep 20 22:09:52 GMT 2025