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/*
* 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);
}
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