98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
|
/*
|
||
|
|
* Carsten Langgaard, carstenl@mips.com
|
||
|
|
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can distribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License (Version 2) as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* 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.,
|
||
|
|
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||
|
|
*
|
||
|
|
* This is the interface to the remote debugger stub.
|
||
|
|
*/
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/mips-boards/atlas.h>
|
||
|
|
#include <asm/mips-boards/saa9730_uart.h>
|
||
|
|
|
||
|
|
#define INB(a) inb((unsigned long)a)
|
||
|
|
#define OUTB(x,a) outb(x,(unsigned long)a)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This is the interface to the remote debugger stub
|
||
|
|
* if the Philips part is used for the debug port,
|
||
|
|
* called from the platform setup code.
|
||
|
|
*/
|
||
|
|
void *saa9730_base = (void *)ATLAS_SAA9730_REG;
|
||
|
|
|
||
|
|
static int saa9730_kgdb_active = 0;
|
||
|
|
|
||
|
|
#define SAA9730_BAUDCLOCK(baud) (((ATLAS_SAA9730_BAUDCLOCK/(baud))/16)-1)
|
||
|
|
|
||
|
|
int saa9730_kgdb_hook(int speed)
|
||
|
|
{
|
||
|
|
int baudclock;
|
||
|
|
t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Clear all interrupts
|
||
|
|
*/
|
||
|
|
(void) INB(&kgdb_uart->Lsr);
|
||
|
|
(void) INB(&kgdb_uart->Msr);
|
||
|
|
(void) INB(&kgdb_uart->Thr_Rbr);
|
||
|
|
(void) INB(&kgdb_uart->Iir_Fcr);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Now, initialize the UART
|
||
|
|
*/
|
||
|
|
/* 8 data bits, one stop bit, no parity */
|
||
|
|
OUTB(SAA9730_LCR_DATA8, &kgdb_uart->Lcr);
|
||
|
|
|
||
|
|
baudclock = SAA9730_BAUDCLOCK(speed);
|
||
|
|
|
||
|
|
OUTB((baudclock >> 16) & 0xff, &kgdb_uart->BaudDivMsb);
|
||
|
|
OUTB( baudclock & 0xff, &kgdb_uart->BaudDivLsb);
|
||
|
|
|
||
|
|
/* Set RTS/DTR active */
|
||
|
|
OUTB(SAA9730_MCR_DTR | SAA9730_MCR_RTS, &kgdb_uart->Mcr);
|
||
|
|
saa9730_kgdb_active = 1;
|
||
|
|
|
||
|
|
return speed;
|
||
|
|
}
|
||
|
|
|
||
|
|
int saa9730_putDebugChar(char c)
|
||
|
|
{
|
||
|
|
t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
|
||
|
|
|
||
|
|
if (!saa9730_kgdb_active) { /* need to init device first */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_THRE))
|
||
|
|
;
|
||
|
|
OUTB(c, &kgdb_uart->Thr_Rbr);
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
char saa9730_getDebugChar(void)
|
||
|
|
{
|
||
|
|
t_uart_saa9730_regmap *kgdb_uart = (t_uart_saa9730_regmap *)(saa9730_base + SAA9730_UART_REGS_ADDR);
|
||
|
|
char c;
|
||
|
|
|
||
|
|
if (!saa9730_kgdb_active) { /* need to init device first */
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
while (!(INB(&kgdb_uart->Lsr) & SAA9730_LSR_DR))
|
||
|
|
;
|
||
|
|
|
||
|
|
c = INB(&kgdb_uart->Thr_Rbr);
|
||
|
|
return(c);
|
||
|
|
}
|