1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 M. Warner Losh <imp@FreeBSD.org> 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 <dev/uart/uart.h> 41 #include <dev/uart/uart_bus.h> 42 #include <dev/uart/uart_cpu_acpi.h> 43 #include <contrib/dev/acpica/include/acpi.h> 44 #include <contrib/dev/acpica/include/accommon.h> 45 #include <dev/acpica/acpivar.h> 46 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 static struct acpi_uart_compat_data * 66 uart_acpi_find_device(device_t dev) 67 { 68 struct acpi_uart_compat_data **cd, *cd_it; 69 ACPI_HANDLE h; 70 71 if ((h = acpi_get_handle(dev)) == NULL) 72 return (NULL); 73 74 SET_FOREACH(cd, uart_acpi_class_and_device_set) { 75 for (cd_it = *cd; cd_it->cd_hid != NULL; cd_it++) { 76 if (acpi_MatchHid(h, cd_it->cd_hid)) 77 return (cd_it); 78 } 79 } 80 81 return (NULL); 82 } 83 84 static int 85 uart_acpi_probe(device_t dev) 86 { 87 struct uart_softc *sc; 88 struct acpi_uart_compat_data *cd; 89 90 sc = device_get_softc(dev); 91 92 if ((cd = uart_acpi_find_device(dev)) != NULL) { 93 sc->sc_class = cd->cd_class; 94 if (cd->cd_desc != NULL) 95 device_set_desc(dev, cd->cd_desc); 96 return (uart_bus_probe(dev, cd->cd_regshft, cd->cd_regiowidth, 97 cd->cd_rclk, 0, 0, cd->cd_quirks)); 98 } 99 return (ENXIO); 100 } 101 102 DRIVER_MODULE(uart, acpi, uart_acpi_driver, uart_devclass, 0, 0); 103