forked from luck/tmp_suning_uos_patched
22b1d707ff
Move arch/mips/{jmr3927,tx4927,tx4938} into arch/mips/txx9/ tree.
This will help more code sharing and maintainance.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
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* BRIEF MODULE DESCRIPTION
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* Low level uart routines to directly access a TX[34]927 SIO.
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ahennessy@mvista.com or source@mvista.com
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*
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* Based on arch/mips/ddb5xxx/ddb5477/kgdb_io.c
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*
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* Copyright (C) 2000-2001 Toshiba Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR 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; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/txx9/jmr3927.h>
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#define TIMEOUT 0xffffff
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static int remoteDebugInitialized = 0;
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static void debugInit(int baud);
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int putDebugChar(unsigned char c)
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{
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int i = 0;
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if (!remoteDebugInitialized) {
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remoteDebugInitialized = 1;
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debugInit(38400);
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}
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do {
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slow_down();
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i++;
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if (i>TIMEOUT) {
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break;
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}
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} while (!(tx3927_sioptr(0)->cisr & TXx927_SICISR_TXALS));
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tx3927_sioptr(0)->tfifo = c;
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return 1;
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}
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unsigned char getDebugChar(void)
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{
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int i = 0;
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int dicr;
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char c;
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if (!remoteDebugInitialized) {
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remoteDebugInitialized = 1;
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debugInit(38400);
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}
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/* diable RX int. */
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dicr = tx3927_sioptr(0)->dicr;
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tx3927_sioptr(0)->dicr = 0;
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do {
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slow_down();
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i++;
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if (i>TIMEOUT) {
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break;
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}
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} while (tx3927_sioptr(0)->disr & TXx927_SIDISR_UVALID)
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;
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c = tx3927_sioptr(0)->rfifo;
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/* clear RX int. status */
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tx3927_sioptr(0)->disr &= ~TXx927_SIDISR_RDIS;
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/* enable RX int. */
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tx3927_sioptr(0)->dicr = dicr;
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return c;
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}
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static void debugInit(int baud)
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{
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tx3927_sioptr(0)->lcr = 0x020;
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tx3927_sioptr(0)->dicr = 0;
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tx3927_sioptr(0)->disr = 0x4100;
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tx3927_sioptr(0)->cisr = 0x014;
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tx3927_sioptr(0)->fcr = 0;
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tx3927_sioptr(0)->flcr = 0x02;
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tx3927_sioptr(0)->bgr = ((JMR3927_BASE_BAUD + baud / 2) / baud) |
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TXx927_SIBGR_BCLK_T0;
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}
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