168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
/* $NetBSD: ar5312_console.c,v 1.1 2006/09/26 06:37:32 gdamore Exp $ */
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/*
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* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
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* Copyright (c) 2006 Garrett D'Amore.
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* All rights reserved.
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*
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* Portions of this code were written by Garrett D'Amore for the
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* Champaign-Urbana Community Wireless Network Project.
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgements:
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* This product includes software developed by the Urbana-Champaign
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* Independent Media Center.
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* This product includes software developed by Garrett D'Amore.
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* 4. Urbana-Champaign Independent Media Center's name and Garrett
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* D'Amore's name may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
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* MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* 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
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* This file includes a implementation specific console for AR5312.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ar5312_console.c,v 1.1 2006/09/26 06:37:32 gdamore Exp $");
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#include "opt_ddb.h"
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#include "opt_kgdb.h"
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#include "opt_memsize.h"
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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/buf.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/ar5312reg.h>
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#include <mips/atheros/include/ar531xvar.h>
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#include <mips/atheros/include/arbusvar.h>
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#include "com.h"
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void
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ar531x_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(AR5312_UART0_BASE, ar531x_bus_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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#define STRIDE(x) ((x*4) + MIPS_PHYS_TO_KSEG1(AR5312_UART0_BASE + 3))
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#define THR STRIDE(0)
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#define RHR STRIDE(0)
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#define DLBL STRIDE(0)
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#define DLBH STRIDE(1)
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#define IER STRIDE(1)
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#define FCR STRIDE(2)
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#define LCR STRIDE(3)
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#define MCR STRIDE(4)
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#define LSR STRIDE(5)
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#define MSR STRIDE(6)
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#define SCRATCH STRIDE(7)
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#define INB(x) (*(volatile char *)(x))
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#define OUTB(x, v) (*(volatile char *)(x) = (v))
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/* line status register */
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#define LSR_RCV_FIFO 0x80
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#define LSR_TSRE 0x40 /* Transmitter empty: byte sent */
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#define LSR_TXRDY 0x20 /* Transmitter buffer empty */
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#define LSR_BI 0x10 /* Break detected */
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#define LSR_FE 0x08 /* Framing error: bad stop bit */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_OE 0x02 /* Overrun, lost incoming byte */
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#define LSR_RXRDY 0x01 /* Byte ready in Receive Buffer */
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#define LSR_RCV_MASK 0x1f /* Mask for incoming data or error */
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static void
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ar5312_putc(dev_t dev, int c)
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{
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unsigned char lsr = 0;
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while (!(lsr & LSR_TXRDY)) {
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lsr = INB(LSR);
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}
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OUTB(THR, (char)c);
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}
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static int
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ar5312_getc(dev_t dev)
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{
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unsigned char lsr = 0, dat;
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while (!(lsr & LSR_RXRDY)) {
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lsr = INB(LSR);
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}
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dat = INB(RHR);
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return (dat);
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}
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static void
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ar5312_flush(dev_t dev)
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{
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unsigned char lsr = 0;
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while (!(lsr & LSR_TSRE)) {
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lsr = INB(LSR);
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}
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}
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void
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ar531x_early_console(void)
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{
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static struct consdev promcn = {
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.cn_probe = NULL,
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.cn_init = NULL,
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.cn_getc = ar5312_getc,
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.cn_putc = ar5312_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 = ar5312_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 = &promcn;
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}
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