forked from luck/tmp_suning_uos_patched
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
156 lines
4.1 KiB
C
156 lines
4.1 KiB
C
/*
|
|
* BRIEF MODULE DESCRIPTION
|
|
* Low level uart routines to directly access a TX[34]927 SIO.
|
|
*
|
|
* Copyright 2001 MontaVista Software Inc.
|
|
* Author: MontaVista Software, Inc.
|
|
* ahennessy@mvista.com or source@mvista.com
|
|
*
|
|
* Based on arch/mips/ddb5xxx/ddb5477/kgdb_io.c
|
|
*
|
|
* Copyright (C) 2000-2001 Toshiba Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/jmr3927/txx927.h>
|
|
#include <asm/jmr3927/tx3927.h>
|
|
#include <asm/jmr3927/jmr3927.h>
|
|
|
|
#define TIMEOUT 0xffffff
|
|
#define SLOW_DOWN
|
|
|
|
static const char digits[16] = "0123456789abcdef";
|
|
|
|
#ifdef SLOW_DOWN
|
|
#define slow_down() { int k; for (k=0; k<10000; k++); }
|
|
#else
|
|
#define slow_down()
|
|
#endif
|
|
|
|
static int remoteDebugInitialized = 0;
|
|
|
|
int putDebugChar(unsigned char c)
|
|
{
|
|
int i = 0;
|
|
|
|
if (!remoteDebugInitialized) {
|
|
remoteDebugInitialized = 1;
|
|
debugInit(38400);
|
|
}
|
|
|
|
do {
|
|
slow_down();
|
|
i++;
|
|
if (i>TIMEOUT) {
|
|
break;
|
|
}
|
|
} while (!(tx3927_sioptr(0)->cisr & TXx927_SICISR_TXALS));
|
|
tx3927_sioptr(0)->tfifo = c;
|
|
|
|
return 1;
|
|
}
|
|
|
|
unsigned char getDebugChar(void)
|
|
{
|
|
int i = 0;
|
|
int dicr;
|
|
char c;
|
|
|
|
if (!remoteDebugInitialized) {
|
|
remoteDebugInitialized = 1;
|
|
debugInit(38400);
|
|
}
|
|
|
|
/* diable RX int. */
|
|
dicr = tx3927_sioptr(0)->dicr;
|
|
tx3927_sioptr(0)->dicr = 0;
|
|
|
|
do {
|
|
slow_down();
|
|
i++;
|
|
if (i>TIMEOUT) {
|
|
break;
|
|
}
|
|
} while (tx3927_sioptr(0)->disr & TXx927_SIDISR_UVALID)
|
|
;
|
|
c = tx3927_sioptr(0)->rfifo;
|
|
|
|
/* clear RX int. status */
|
|
tx3927_sioptr(0)->disr &= ~TXx927_SIDISR_RDIS;
|
|
/* enable RX int. */
|
|
tx3927_sioptr(0)->dicr = dicr;
|
|
|
|
return c;
|
|
}
|
|
|
|
void debugInit(int baud)
|
|
{
|
|
/*
|
|
volatile unsigned long lcr;
|
|
volatile unsigned long dicr;
|
|
volatile unsigned long disr;
|
|
volatile unsigned long cisr;
|
|
volatile unsigned long fcr;
|
|
volatile unsigned long flcr;
|
|
volatile unsigned long bgr;
|
|
volatile unsigned long tfifo;
|
|
volatile unsigned long rfifo;
|
|
*/
|
|
|
|
tx3927_sioptr(0)->lcr = 0x020;
|
|
tx3927_sioptr(0)->dicr = 0;
|
|
tx3927_sioptr(0)->disr = 0x4100;
|
|
tx3927_sioptr(0)->cisr = 0x014;
|
|
tx3927_sioptr(0)->fcr = 0;
|
|
tx3927_sioptr(0)->flcr = 0x02;
|
|
tx3927_sioptr(0)->bgr = ((JMR3927_BASE_BAUD + baud / 2) / baud) |
|
|
TXx927_SIBGR_BCLK_T0;
|
|
#if 0
|
|
/*
|
|
* Reset the UART.
|
|
*/
|
|
tx3927_sioptr(0)->fcr = TXx927_SIFCR_SWRST;
|
|
while (tx3927_sioptr(0)->fcr & TXx927_SIFCR_SWRST)
|
|
;
|
|
|
|
/*
|
|
* and set the speed of the serial port
|
|
* (currently hardwired to 9600 8N1
|
|
*/
|
|
|
|
tx3927_sioptr(0)->lcr = TXx927_SILCR_UMODE_8BIT |
|
|
TXx927_SILCR_USBL_1BIT |
|
|
TXx927_SILCR_SCS_IMCLK_BG;
|
|
tx3927_sioptr(0)->bgr =
|
|
((JMR3927_BASE_BAUD + baud / 2) / baud) |
|
|
TXx927_SIBGR_BCLK_T0;
|
|
|
|
/* HW RTS/CTS control */
|
|
if (ser->flags & ASYNC_HAVE_CTS_LINE)
|
|
tx3927_sioptr(0)->flcr = TXx927_SIFLCR_RCS | TXx927_SIFLCR_TES |
|
|
TXx927_SIFLCR_RTSTL_MAX /* 15 */;
|
|
/* Enable RX/TX */
|
|
tx3927_sioptr(0)->flcr &= ~(TXx927_SIFLCR_RSDE | TXx927_SIFLCR_TSDE);
|
|
#endif
|
|
}
|