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/* $NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This file implement an Atheros dependent early console.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ar_console.c,v 1.2 2011/07/10 06:26:02 matt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/termios.h>
#include <dev/cons.h>
#include <mips/cache.h>
#include <mips/locore.h>
#include <mips/cpuregs.h>
#include <mips/atheros/include/platform.h>
#include <mips/atheros/include/arbusvar.h>
#include <mips/locore.h>
#include "com.h"
#include <dev/ic/ns16450reg.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>
void
atheros_consinit(void)
{
/*
* Everything related to console initialization is done
* in mach_init().
*/
#if NCOM > 0
/* Setup polled serial for early console I/O */
/* XXX: pass in CONSPEED? */
com_arbus_cnattach(platformsw->apsw_uart0_base,
atheros_get_uart_freq());
#else
panic("Not configured to use serial console!\n");
/* not going to see that message now, are we? */
#endif
}
/*
* Early console support.
*/
static void
earlycons_putc(dev_t dev, int c)
{
volatile uint32_t * const uart =
(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
while (!(uart[com_lsr] & htobe32(LSR_TXRDY)))
continue;
uart[com_data] = htobe32(c);
}
static int
earlycons_getc(dev_t dev)
{
volatile uint32_t * const uart =
(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
while (!(uart[com_lsr] & htobe32(LSR_RXRDY)))
continue;
return (uint8_t) be32toh(uart[com_data]);
}
static void
earlycons_flush(dev_t dev)
{
volatile uint32_t * const uart =
(volatile uint32_t *)MIPS_PHYS_TO_KSEG1(platformsw->apsw_uart0_base);
while (!(uart[com_lsr] & htobe32(LSR_TSRE)))
continue;
}
void
atheros_early_consinit(void)
{
static struct consdev earlycons_cn = {
.cn_probe = NULL,
.cn_init = NULL,
.cn_getc = earlycons_getc,
.cn_putc = earlycons_putc,
.cn_pollc = nullcnpollc,
.cn_bell = NULL,
.cn_halt = NULL,
.cn_flush = earlycons_flush,
.cn_dev = makedev(0, 0),
.cn_pri = CN_DEAD,
};
cn_tab = &earlycons_cn;
}
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