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 static int uart_acpi_probe(device_t dev); 48 49 static device_method_t uart_acpi_methods[] = { 50 /* Device interface */ 51 DEVMETHOD(device_probe, uart_acpi_probe), 52 DEVMETHOD(device_attach, uart_bus_attach), 53 DEVMETHOD(device_detach, uart_bus_detach), 54 DEVMETHOD(device_resume, uart_bus_resume), 55 { 0, 0 } 56 }; 57 58 static driver_t uart_acpi_driver = { 59 uart_driver_name, 60 uart_acpi_methods, 61 sizeof(struct uart_softc), 62 }; 63 64 static struct acpi_uart_compat_data * 65 uart_acpi_find_device(device_t dev) 66 { 67 struct acpi_uart_compat_data **cd, *cd_it; 68 ACPI_HANDLE h; 69 70 if ((h = acpi_get_handle(dev)) == NULL) 71 return (NULL); 72 73 SET_FOREACH(cd, uart_acpi_class_and_device_set) { 74 for (cd_it = *cd; cd_it->cd_hid != NULL; cd_it++) { 75 if (acpi_MatchHid(h, cd_it->cd_hid)) 76 return (cd_it); 77 } 78 } 79 80 return (NULL); 81 } 82 83 static int 84 uart_acpi_probe(device_t dev) 85 { 86 struct uart_softc *sc; 87 struct acpi_uart_compat_data *cd; 88 89 sc = device_get_softc(dev); 90 91 if ((cd = uart_acpi_find_device(dev)) != NULL) { 92 sc->sc_class = cd->cd_class; 93 if (cd->cd_desc != NULL) 94 device_set_desc(dev, cd->cd_desc); 95 return (uart_bus_probe(dev, cd->cd_regshft, cd->cd_regiowidth, 96 cd->cd_rclk, 0, 0, cd->cd_quirks)); 97 } 98 return (ENXIO); 99 } 100 101 DRIVER_MODULE(uart, acpi, uart_acpi_driver, 0, 0); 102