1 /* $NetBSD: com_ebus.c,v 1.14 2008/03/14 15:09:10 cube Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: com_ebus.c,v 1.14 2008/03/14 15:09:10 cube Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/device.h> 45 #include <sys/termios.h> 46 47 #include <machine/bus.h> 48 #include <machine/autoconf.h> 49 #include <machine/intr.h> 50 51 #include <dev/ebus/ebusreg.h> 52 #include <dev/ebus/ebusvar.h> 53 54 #include <dev/ic/comreg.h> 55 #include <dev/ic/comvar.h> 56 57 struct com_ebus_softc { 58 struct com_softc ebsc_com; /* real "com" softc */ 59 60 /* this space for rent */ 61 }; 62 63 static int com_ebus_match(device_t, cfdata_t , void *); 64 static void com_ebus_attach(device_t, device_t, void *); 65 66 CFATTACH_DECL_NEW(com_ebus, sizeof(struct com_ebus_softc), 67 com_ebus_match, com_ebus_attach, NULL, NULL); 68 69 static int 70 com_ebus_match(device_t parent, cfdata_t cf, void *aux) 71 { 72 struct ebus_attach_args *ea = aux; 73 bus_space_handle_t ioh; 74 int match; 75 76 if (strcmp(ea->ea_name, "su") != 0) 77 return (0); 78 79 match = 0; 80 if (bus_space_map(ea->ea_bustag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]), 81 ea->ea_reg[0].size, 0, &ioh) == 0) 82 { 83 match = comprobe1(ea->ea_bustag, ioh); 84 bus_space_unmap(ea->ea_bustag, ioh, ea->ea_reg[0].size); 85 } 86 87 return (match); 88 } 89 90 static void 91 com_ebus_attach(device_t parent, device_t self, void *aux) 92 { 93 struct com_ebus_softc *ebsc = device_private(self); 94 struct com_softc *sc = &ebsc->ebsc_com; 95 struct ebus_attach_args *ea = aux; 96 bus_space_tag_t iot; 97 bus_space_handle_t ioh; 98 bus_addr_t iobase; 99 100 sc->sc_dev = self; 101 iot = ea->ea_bustag; 102 iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]); 103 sc->sc_frequency = COM_FREQ; 104 sc->sc_hwflags = COM_HW_NO_TXPRELOAD; 105 106 /* 107 * XXX: It would be nice to be able to split console input and 108 * output to different devices. For now switch to serial 109 * console if PROM stdin is on serial (so that we can use DDB). 110 */ 111 if (prom_instance_to_package(prom_stdin()) == ea->ea_node) 112 comcnattach(iot, iobase, B9600, sc->sc_frequency, 113 COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8)); 114 115 if (!com_is_console(iot, iobase, &ioh) 116 && bus_space_map(iot, iobase, ea->ea_reg[0].size, 117 0, &ioh) != 0) 118 { 119 aprint_error(": unable to map device registers\n"); 120 return; 121 } 122 123 COM_INIT_REGS(sc->sc_regs, iot, ioh, iobase); 124 125 com_attach_subr(sc); 126 127 if (ea->ea_nintr != 0) 128 (void)bus_intr_establish(iot, ea->ea_intr[0], IPL_SERIAL, 129 comintr, sc); 130 } 131