/* $NetBSD: com.c,v 1.4 2008/04/28 20:23:21 martin Exp $ */
/*-
* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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.
*/
/*
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)com.c 7.5 (Berkeley) 5/16/91
*/
#include <sys/param.h>
#include <lib/libsa/stand.h>
#include <hpcmips/vr/vripreg.h>
#include <hpcmips/vr/cmureg.h>
#include <dev/ic/comreg.h>
#include <dev/ic/ns16550reg.h>
#include <dev/ic/st16650reg.h>
#define com_lcr com_cfcr
#include "extern.h"
#if 0
#define VRCOM_FREQ 18432000 /* 18.432kHz */
#endif
int
iskey(void)
{
return ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_RXRDY);
}
int
getchar(void)
{
u_int8_t stat;
u_int8_t c;
/* block until a character becomes available */
while (!ISKEY)
;
c = REGREAD_1(VR4181_SIU_ADDR, com_data);
stat = REGREAD_1(VR4181_SIU_ADDR, com_iir);
return c;
}
static void
comcnputc(int c)
{
int timo;
/* wait for any pending transmission to finish */
timo = 150000;
while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY)
&& --timo)
continue;
REGWRITE_1(VR4181_SIU_ADDR, com_data, c);
/* wait for this transmission to complete */
timo = 1500000;
while (!ISSET(REGREAD_1(VR4181_SIU_ADDR, com_lsr), LSR_TXRDY)
&& --timo)
continue;
}
void
putchar(int c)
{
if (c == '\n')
comcnputc('\r');
comcnputc(c);
}
/*
* Initialize UART for use as console or KGDB line.
*/
void
comcninit(void)
{
int rate;
/* enable divisor latch access and set bit rate */
REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_DLAB);
rate = 10; /* 115200bps with VRCOM_FREQ */
REGWRITE_1(VR4181_SIU_ADDR, com_dlbl, rate);
REGWRITE_1(VR4181_SIU_ADDR, com_dlbh, rate >> 8);
/*
* disable divisor latch access and,
* set "8bit non-parity 1 stop bit"
*/
REGWRITE_1(VR4181_SIU_ADDR, com_lcr, LCR_8BITS);
/* disable all interrupt */
REGWRITE_1(VR4181_SIU_ADDR, com_ier, 0);
/* enable FIFO */
REGWRITE_1(VR4181_SIU_ADDR, com_fifo,
FIFO_ENABLE | FIFO_RCV_RST | FIFO_XMT_RST | FIFO_TRIGGER_1);
/* set DTR and RTS low */
REGWRITE_1(VR4181_SIU_ADDR, com_mcr, MCR_DTR | MCR_RTS);
}