136 lines
4.1 KiB
C
136 lines
4.1 KiB
C
/* $NetBSD: com_mainbus.c,v 1.14 2006/07/13 22:56:00 gdamore Exp $ */
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/*
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* Copyright (c) 2000 Soren S. Jorvang. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: com_mainbus.c,v 1.14 2006/07/13 22:56:00 gdamore Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/termios.h>
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#include <machine/autoconf.h>
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#include <machine/intr.h>
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#include <machine/bus.h>
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#include <machine/nvram.h>
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#include <machine/bootinfo.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#include <cobalt/dev/com_mainbusvar.h>
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extern int console_present;
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struct com_mainbus_softc {
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struct com_softc sc_com;
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void *sc_ih;
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};
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#define COM_MAINBUS_FREQ (COM_FREQ * 10)
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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static int com_mainbus_probe(struct device *, struct cfdata *, void *);
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static void com_mainbus_attach(struct device *, struct device *, void *);
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CFATTACH_DECL(com_mainbus, sizeof(struct com_mainbus_softc),
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com_mainbus_probe, com_mainbus_attach, NULL, NULL);
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int
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com_mainbus_probe(struct device *parent, struct cfdata *match, void *aux)
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{
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switch (cobalt_id) {
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case COBALT_ID_RAQ:
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case COBALT_ID_QUBE2:
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case COBALT_ID_RAQ2:
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return 1;
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}
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return 0;
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}
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void
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com_mainbus_attach(struct device *parent, struct device *self, void *aux)
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{
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struct com_mainbus_softc *msc = (void *)self;
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struct com_softc *sc = &msc->sc_com;
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struct mainbus_attach_args *maa = aux;
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bus_space_handle_t ioh;
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if (!com_is_console(maa->ma_iot, maa->ma_addr, &ioh) &&
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bus_space_map(maa->ma_iot, maa->ma_addr, COM_NPORTS, 0, &ioh)) {
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printf(": can't map i/o space\n");
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return;
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}
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COM_INIT_REGS(sc->sc_regs, maa->ma_iot, ioh, maa->ma_addr);
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sc->sc_frequency = COM_MAINBUS_FREQ;
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com_attach_subr(sc);
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cpu_intr_establish(maa->ma_level, IPL_SERIAL, comintr, sc);
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return;
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}
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void
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com_mainbus_cnprobe(struct consdev *cn)
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{
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struct btinfo_flags *bi_flags;
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/*
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* Linux code has a comment that serial console must be probed
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* early, otherwise the value which allows to detect serial port
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* could be overwritten. Okay, probe here and record the result
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* for the future use.
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*
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* Note that if the kernel was booted with a boot loader,
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* the latter *has* to provide a flag indicating whether console
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* is present or not because the value might be overwritten by
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* the loaded kernel.
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*/
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if ((bi_flags = lookup_bootinfo(BTINFO_FLAGS)) == NULL) {
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/* No boot information, probe console now */
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console_present = *(volatile uint32_t *)
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MIPS_PHYS_TO_KSEG1(0x0020001c);
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} else {
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/* Get the value determined by the boot loader. */
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console_present = bi_flags->bi_flags & BI_SERIAL_CONSOLE;
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}
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cn->cn_pri = (console_present != 0) ? CN_NORMAL : CN_DEAD;
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}
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void
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com_mainbus_cninit(struct consdev *cn)
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{
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comcnattach(0, 0x1c800000, 115200, COM_MAINBUS_FREQ, COM_TYPE_NORMAL,
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CONMODE);
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}
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