1 /*- 2 * Copyright (c) 2001 M. Warner Losh. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD$"); 27 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/bus.h> 31 #include <sys/conf.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <machine/bus.h> 35 #include <sys/rman.h> 36 #include <machine/resource.h> 37 38 #include <isa/isavar.h> 39 40 #include <dev/uart/uart.h> 41 #include <dev/uart/uart_bus.h> 42 #include <dev/uart/uart_cpu_acpi.h> 43 44 #include <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <dev/acpica/acpivar.h> 47 48 static int uart_acpi_probe(device_t dev); 49 50 static device_method_t uart_acpi_methods[] = { 51 /* Device interface */ 52 DEVMETHOD(device_probe, uart_acpi_probe), 53 DEVMETHOD(device_attach, uart_bus_attach), 54 DEVMETHOD(device_detach, uart_bus_detach), 55 DEVMETHOD(device_resume, uart_bus_resume), 56 { 0, 0 } 57 }; 58 59 static driver_t uart_acpi_driver = { 60 uart_driver_name, 61 uart_acpi_methods, 62 sizeof(struct uart_softc), 63 }; 64 65 #if defined(__i386__) || defined(__amd64__) 66 static struct isa_pnp_id acpi_ns8250_ids[] = { 67 {0x0005d041, "Standard PC COM port"}, /* PNP0500 */ 68 {0x0105d041, "16550A-compatible COM port"}, /* PNP0501 */ 69 {0x0205d041, "Multiport serial device (non-intelligent 16550)"}, /* PNP0502 */ 70 {0x1005d041, "Generic IRDA-compatible device"}, /* PNP0510 */ 71 {0x1105d041, "Generic IRDA-compatible device"}, /* PNP0511 */ 72 {0x04f0235c, "Wacom Tablet PC Screen"}, /* WACF004 */ 73 {0xe502aa1a, "Wacom Tablet at FuS Lifebook T"}, /* FUJ02E5 */ 74 {0} 75 }; 76 #endif 77 78 #ifdef __aarch64__ 79 static struct uart_class * 80 uart_acpi_find_device(device_t dev) 81 { 82 struct acpi_uart_compat_data **cd; 83 ACPI_HANDLE h; 84 85 if ((h = acpi_get_handle(dev)) == NULL) 86 return (NULL); 87 88 SET_FOREACH(cd, uart_acpi_class_and_device_set) { 89 if (acpi_MatchHid(h, (*cd)->hid)) { 90 return ((*cd)->clas); 91 } 92 } 93 94 return (NULL); 95 } 96 #endif 97 98 static int 99 uart_acpi_probe(device_t dev) 100 { 101 struct uart_softc *sc; 102 device_t parent; 103 104 parent = device_get_parent(dev); 105 sc = device_get_softc(dev); 106 107 #if defined(__i386__) || defined(__amd64__) 108 if (!ISA_PNP_PROBE(parent, dev, acpi_ns8250_ids)) { 109 sc->sc_class = &uart_ns8250_class; 110 return (uart_bus_probe(dev, 0, 0, 0, 0)); 111 } 112 113 /* Add checks for non-ns8250 IDs here. */ 114 #elif defined(__aarch64__) 115 if ((sc->sc_class = uart_acpi_find_device(dev)) != NULL) 116 return (uart_bus_probe(dev, 2, 0, 0, 0)); 117 #endif 118 119 return (ENXIO); 120 } 121 122 DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0); 123