1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 M. Warner Losh. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 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, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/bus.h> 33 #include <sys/conf.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <machine/bus.h> 37 #include <sys/rman.h> 38 #include <machine/resource.h> 39 40 #include <isa/isavar.h> 41 42 #include <dev/uart/uart.h> 43 #include <dev/uart/uart_bus.h> 44 #include <dev/uart/uart_cpu_acpi.h> 45 46 #ifdef __aarch64__ 47 #include <contrib/dev/acpica/include/acpi.h> 48 #include <contrib/dev/acpica/include/accommon.h> 49 #include <dev/acpica/acpivar.h> 50 #endif 51 52 static int uart_acpi_probe(device_t dev); 53 54 static device_method_t uart_acpi_methods[] = { 55 /* Device interface */ 56 DEVMETHOD(device_probe, uart_acpi_probe), 57 DEVMETHOD(device_attach, uart_bus_attach), 58 DEVMETHOD(device_detach, uart_bus_detach), 59 DEVMETHOD(device_resume, uart_bus_resume), 60 { 0, 0 } 61 }; 62 63 static driver_t uart_acpi_driver = { 64 uart_driver_name, 65 uart_acpi_methods, 66 sizeof(struct uart_softc), 67 }; 68 69 #if defined(__i386__) || defined(__amd64__) 70 static struct isa_pnp_id acpi_ns8250_ids[] = { 71 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 72 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 73 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 74 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 75 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 76 {0x04f0235c, "Wacom Tablet PC Screen"}, /* WACF004 */ 77 {0x0ef0235c, "Wacom Tablet PC Screen 00e"}, /* WACF00e */ 78 {0xe502aa1a, "Wacom Tablet at FuS Lifebook T"}, /* FUJ02E5 */ 79 {0} 80 }; 81 #endif 82 83 #ifdef __aarch64__ 84 static struct uart_class * 85 uart_acpi_find_device(device_t dev) 86 { 87 struct acpi_uart_compat_data **cd; 88 ACPI_HANDLE h; 89 90 if ((h = acpi_get_handle(dev)) == NULL) 91 return (NULL); 92 93 SET_FOREACH(cd, uart_acpi_class_and_device_set) { 94 if (acpi_MatchHid(h, (*cd)->hid)) { 95 return ((*cd)->clas); 96 } 97 } 98 99 return (NULL); 100 } 101 #endif 102 103 static int 104 uart_acpi_probe(device_t dev) 105 { 106 struct uart_softc *sc; 107 108 sc = device_get_softc(dev); 109 110 #if defined(__i386__) || defined(__amd64__) 111 if (!ISA_PNP_PROBE(device_get_parent(dev), dev, acpi_ns8250_ids)) { 112 sc->sc_class = &uart_ns8250_class; 113 return (uart_bus_probe(dev, 0, 0, 0, 0, 0)); 114 } 115 116 /* Add checks for non-ns8250 IDs here. */ 117 #elif defined(__aarch64__) 118 if ((sc->sc_class = uart_acpi_find_device(dev)) != NULL) 119 return (uart_bus_probe(dev, 2, 0, 0, 0, 0)); 120 #endif 121 122 return (ENXIO); 123 } 124 125 DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0); 126