2 * BRIEF MODULE DESCRIPTION
3 * Low level uart routines to directly access a TX[34]927 SIO.
5 * Copyright 2001 MontaVista Software Inc.
6 * Author: MontaVista Software, Inc.
7 * ahennessy@mvista.com or source@mvista.com
9 * Based on arch/mips/ddb5xxx/ddb5477/kgdb_io.c
11 * Copyright (C) 2000-2001 Toshiba Corporation
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
21 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * You should have received a copy of the GNU General Public License along
30 * with this program; if not, write to the Free Software Foundation, Inc.,
31 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include <asm/txx9/jmr3927.h>
36 #define TIMEOUT 0xffffff
38 static int remoteDebugInitialized = 0;
39 static void debugInit(int baud);
41 int putDebugChar(unsigned char c)
45 if (!remoteDebugInitialized) {
46 remoteDebugInitialized = 1;
56 } while (!(tx3927_sioptr(0)->cisr & TXx927_SICISR_TXALS));
57 tx3927_sioptr(0)->tfifo = c;
62 unsigned char getDebugChar(void)
68 if (!remoteDebugInitialized) {
69 remoteDebugInitialized = 1;
74 dicr = tx3927_sioptr(0)->dicr;
75 tx3927_sioptr(0)->dicr = 0;
83 } while (tx3927_sioptr(0)->disr & TXx927_SIDISR_UVALID)
85 c = tx3927_sioptr(0)->rfifo;
87 /* clear RX int. status */
88 tx3927_sioptr(0)->disr &= ~TXx927_SIDISR_RDIS;
90 tx3927_sioptr(0)->dicr = dicr;
95 static void debugInit(int baud)
97 tx3927_sioptr(0)->lcr = 0x020;
98 tx3927_sioptr(0)->dicr = 0;
99 tx3927_sioptr(0)->disr = 0x4100;
100 tx3927_sioptr(0)->cisr = 0x014;
101 tx3927_sioptr(0)->fcr = 0;
102 tx3927_sioptr(0)->flcr = 0x02;
103 tx3927_sioptr(0)->bgr = ((JMR3927_BASE_BAUD + baud / 2) / baud) |
104 TXx927_SIBGR_BCLK_T0;