1 /* $NetBSD: com_mainbus.c,v 1.14 2006/07/13 22:56:00 gdamore Exp $ */ 2 3 /* 4 * Copyright (c) 2000 Soren S. Jorvang. All rights reserved. 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: com_mainbus.c,v 1.14 2006/07/13 22:56:00 gdamore Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/systm.h> 33 #include <sys/device.h> 34 #include <sys/termios.h> 35 36 #include <machine/autoconf.h> 37 #include <machine/intr.h> 38 #include <machine/bus.h> 39 #include <machine/nvram.h> 40 #include <machine/bootinfo.h> 41 42 #include <dev/ic/comreg.h> 43 #include <dev/ic/comvar.h> 44 45 #include <cobalt/dev/com_mainbusvar.h> 46 47 extern int console_present; 48 49 struct com_mainbus_softc { 50 struct com_softc sc_com; 51 void *sc_ih; 52 }; 53 54 #define COM_MAINBUS_FREQ (COM_FREQ * 10) 55 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 56 57 static int com_mainbus_probe(struct device *, struct cfdata *, void *); 58 static void com_mainbus_attach(struct device *, struct device *, void *); 59 60 CFATTACH_DECL(com_mainbus, sizeof(struct com_mainbus_softc), 61 com_mainbus_probe, com_mainbus_attach, NULL, NULL); 62 63 int 64 com_mainbus_probe(struct device *parent, struct cfdata *match, void *aux) 65 { 66 67 switch (cobalt_id) { 68 case COBALT_ID_RAQ: 69 case COBALT_ID_QUBE2: 70 case COBALT_ID_RAQ2: 71 return 1; 72 } 73 74 return 0; 75 } 76 77 void 78 com_mainbus_attach(struct device *parent, struct device *self, void *aux) 79 { 80 struct com_mainbus_softc *msc = (void *)self; 81 struct com_softc *sc = &msc->sc_com; 82 struct mainbus_attach_args *maa = aux; 83 bus_space_handle_t ioh; 84 85 if (!com_is_console(maa->ma_iot, maa->ma_addr, &ioh) && 86 bus_space_map(maa->ma_iot, maa->ma_addr, COM_NPORTS, 0, &ioh)) { 87 printf(": can't map i/o space\n"); 88 return; 89 } 90 COM_INIT_REGS(sc->sc_regs, maa->ma_iot, ioh, maa->ma_addr); 91 92 sc->sc_frequency = COM_MAINBUS_FREQ; 93 94 com_attach_subr(sc); 95 96 cpu_intr_establish(maa->ma_level, IPL_SERIAL, comintr, sc); 97 98 return; 99 } 100 101 void 102 com_mainbus_cnprobe(struct consdev *cn) 103 { 104 struct btinfo_flags *bi_flags; 105 106 /* 107 * Linux code has a comment that serial console must be probed 108 * early, otherwise the value which allows to detect serial port 109 * could be overwritten. Okay, probe here and record the result 110 * for the future use. 111 * 112 * Note that if the kernel was booted with a boot loader, 113 * the latter *has* to provide a flag indicating whether console 114 * is present or not because the value might be overwritten by 115 * the loaded kernel. 116 */ 117 if ((bi_flags = lookup_bootinfo(BTINFO_FLAGS)) == NULL) { 118 /* No boot information, probe console now */ 119 console_present = *(volatile uint32_t *) 120 MIPS_PHYS_TO_KSEG1(0x0020001c); 121 } else { 122 /* Get the value determined by the boot loader. */ 123 console_present = bi_flags->bi_flags & BI_SERIAL_CONSOLE; 124 } 125 126 cn->cn_pri = (console_present != 0) ? CN_NORMAL : CN_DEAD; 127 } 128 129 void 130 com_mainbus_cninit(struct consdev *cn) 131 { 132 133 comcnattach(0, 0x1c800000, 115200, COM_MAINBUS_FREQ, COM_TYPE_NORMAL, 134 CONMODE); 135 } 136