133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/* $NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file implement an Atheros dependent early console.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/termios.h>
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#include <dev/cons.h>
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#include <mips/cache.h>
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#include <mips/locore.h>
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#include <mips/cpuregs.h>
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#include <mips/atheros/include/platform.h>
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#include <mips/atheros/include/arbusvar.h>
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#include <mips/locore.h>
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#include "com.h"
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#include <dev/ic/ns16450reg.h>
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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void
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atheros_consinit(void)
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{
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/*
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* Everything related to console initialization is done
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* in mach_init().
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*/
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#if NCOM > 0
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/* Setup polled serial for early console I/O */
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/* XXX: pass in CONSPEED? */
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com_arbus_cnattach(platformsw->apsw_uart0_base,
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atheros_get_uart_freq());
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#else
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panic("Not configured to use serial console!\n");
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/* not going to see that message now, are we? */
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#endif
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}
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/*
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* Early console support.
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*/
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static void
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earlycons_putc(dev_t dev, int c)
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{
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volatile uint32_t * const uart =
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(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
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while (!(uart[com_lsr] & htobe32(LSR_TXRDY)))
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continue;
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uart[com_data] = htobe32(c);
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}
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static int
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earlycons_getc(dev_t dev)
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{
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volatile uint32_t * const uart =
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(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
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while (!(uart[com_lsr] & htobe32(LSR_RXRDY)))
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continue;
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return (uint8_t) be32toh(uart[com_data]);
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}
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static void
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earlycons_flush(dev_t dev)
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{
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volatile uint32_t * const uart =
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(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
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while (!(uart[com_lsr] & htobe32(LSR_TSRE)))
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continue;
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}
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void
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atheros_early_consinit(void)
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{
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static struct consdev earlycons_cn = {
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.cn_probe = NULL,
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.cn_init = NULL,
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.cn_getc = earlycons_getc,
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.cn_putc = earlycons_putc,
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.cn_pollc = nullcnpollc,
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.cn_bell = NULL,
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.cn_halt = NULL,
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.cn_flush = earlycons_flush,
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.cn_dev = makedev(0, 0),
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.cn_pri = CN_DEAD,
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};
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cn_tab = &earlycons_cn;
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}
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