1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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/param.h> 28 #include <sys/systm.h> 29 #include <sys/bus.h> 30 #include <sys/conf.h> 31 #include <sys/kernel.h> 32 #include <sys/module.h> 33 #include <machine/bus.h> 34 #include <sys/rman.h> 35 #include <machine/resource.h> 36 37 #include <dev/uart/uart.h> 38 #include <dev/uart/uart_bus.h> 39 #include <dev/uart/uart_cpu_acpi.h> 40 #include <contrib/dev/acpica/include/acpi.h> 41 #include <contrib/dev/acpica/include/accommon.h> 42 #include <dev/acpica/acpivar.h> 43 44 static int uart_acpi_probe(device_t dev); 45 46 static device_method_t uart_acpi_methods[] = { 47 /* Device interface */ 48 DEVMETHOD(device_probe, uart_acpi_probe), 49 DEVMETHOD(device_attach, uart_bus_attach), 50 DEVMETHOD(device_detach, uart_bus_detach), 51 DEVMETHOD(device_resume, uart_bus_resume), 52 { 0, 0 } 53 }; 54 55 static driver_t uart_acpi_driver = { 56 uart_driver_name, 57 uart_acpi_methods, 58 sizeof(struct uart_softc), 59 }; 60 61 static struct acpi_uart_compat_data * 62 uart_acpi_find_device(device_t dev) 63 { 64 struct acpi_uart_compat_data **cd, *cd_it; 65 ACPI_HANDLE h; 66 67 if ((h = acpi_get_handle(dev)) == NULL) 68 return (NULL); 69 70 SET_FOREACH(cd, uart_acpi_class_and_device_set) { 71 for (cd_it = *cd; cd_it->cd_hid != NULL; cd_it++) { 72 if (acpi_MatchHid(h, cd_it->cd_hid)) 73 return (cd_it); 74 } 75 } 76 77 return (NULL); 78 } 79 80 static int 81 uart_acpi_probe(device_t dev) 82 { 83 struct acpi_uart_compat_data *cd; 84 struct uart_softc *sc; 85 uint32_t rclk; 86 ssize_t size; 87 88 sc = device_get_softc(dev); 89 rclk = 0; 90 91 cd = uart_acpi_find_device(dev); 92 if (cd == NULL) 93 return (ENXIO); 94 95 sc->sc_class = cd->cd_class; 96 if (cd->cd_desc != NULL) 97 device_set_desc(dev, cd->cd_desc); 98 99 size = device_get_property(dev, "clock-frequency", &rclk, 100 sizeof(rclk), DEVICE_PROP_UINT32); 101 if (size < 0 || rclk == 0) 102 rclk = cd->cd_rclk; 103 104 return (uart_bus_probe(dev, cd->cd_regshft, cd->cd_regiowidth, 105 rclk, 0, 0, cd->cd_quirks)); 106 } 107 108 DRIVER_MODULE(uart, acpi, uart_acpi_driver, 0, 0); 109