1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001 by Thomas Moestl <[email protected]>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 23 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 38 #include <dev/ofw/ofw_bus.h> 39 40 #include <machine/bus.h> 41 #include <sys/rman.h> 42 #include <machine/resource.h> 43 #include <machine/ver.h> 44 45 #include <dev/uart/uart.h> 46 #include <dev/uart/uart_bus.h> 47 #include <dev/uart/uart_cpu.h> 48 49 static int uart_ebus_probe(device_t dev); 50 51 static device_method_t uart_ebus_methods[] = { 52 /* Device interface */ 53 DEVMETHOD(device_probe, uart_ebus_probe), 54 DEVMETHOD(device_attach, uart_bus_attach), 55 DEVMETHOD(device_detach, uart_bus_detach), 56 { 0, 0 } 57 }; 58 59 static driver_t uart_ebus_driver = { 60 uart_driver_name, 61 uart_ebus_methods, 62 sizeof(struct uart_softc), 63 }; 64 65 static int 66 uart_ebus_probe(device_t dev) 67 { 68 const char *nm, *cmpt; 69 struct uart_softc *sc; 70 struct uart_devinfo dummy; 71 72 sc = device_get_softc(dev); 73 sc->sc_class = NULL; 74 75 nm = ofw_bus_get_name(dev); 76 cmpt = ofw_bus_get_compat(dev); 77 if (cmpt == NULL) 78 cmpt = ""; 79 if (!strcmp(nm, "lom-console") || !strcmp(nm, "su") || 80 !strcmp(nm, "su_pnp") || !strcmp(cmpt, "rsc-console") || 81 !strcmp(cmpt, "rsc-control") || !strcmp(cmpt, "su") || 82 !strcmp(cmpt, "su16550") || !strcmp(cmpt, "su16552")) { 83 /* 84 * On AXi and AXmp boards the NS16550 (used to connect 85 * keyboard/mouse) share their IRQ lines with the i8042. 86 * Any IRQ activity (typically during attach) of the 87 * NS16550 used to connect the keyboard when actually the 88 * PS/2 keyboard is selected in OFW causes interaction 89 * with the OBP i8042 driver resulting in a hang and vice 90 * versa. As RS232 keyboards and mice obviously aren't 91 * meant to be used in parallel with PS/2 ones on these 92 * boards don't attach to the NS16550 in case the RS232 93 * keyboard isn't selected in order to prevent such hangs. 94 */ 95 if ((!strcmp(sparc64_model, "SUNW,UltraAX-MP") || 96 !strcmp(sparc64_model, "SUNW,UltraSPARC-IIi-Engine")) && 97 uart_cpu_getdev(UART_DEV_KEYBOARD, &dummy)) { 98 device_disable(dev); 99 return (ENXIO); 100 } 101 sc->sc_class = &uart_ns8250_class; 102 return (uart_bus_probe(dev, 0, 0, 0, 0, 0)); 103 } 104 105 return (ENXIO); 106 } 107 108 DRIVER_MODULE(uart, ebus, uart_ebus_driver, uart_devclass, 0, 0); 109