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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 <linux/types.h>
#include <linux/serial.h>
#include <linux/serialP.h>
#include <linux/serial_reg.h>
#include <linux/serial_ip3106.h>
#include <asm/serial.h>
#include <asm/io.h>
#include <uart.h>
static struct serial_state rs_table[IP3106_NR_PORTS] = {
};
static struct async_struct kdb_port_info = {0};
void rs_kgdb_hook(int tty_no)
{
struct serial_state *ser = &rs_table[tty_no];
kdb_port_info.state = ser;
kdb_port_info.magic = SERIAL_MAGIC;
kdb_port_info.port = tty_no;
kdb_port_info.flags = ser->flags;
/*
* Clear all interrupts
*/
/* Clear all the transmitter FIFO counters (pointer and status) */
ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_TX_RST;
/* Clear all the receiver FIFO counters (pointer and status) */
ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_RX_RST;
/* Clear all interrupts */
ip3106_iclr(UART_BASE, tty_no) = IP3106_UART_INT_ALLRX |
IP3106_UART_INT_ALLTX;
/*
* Now, initialize the UART
*/
ip3106_lcr(UART_BASE, tty_no) = IP3106_UART_LCR_8BIT;
ip3106_baud(UART_BASE, tty_no) = 5; // 38400 Baud
}
int putDebugChar(char c)
{
/* Wait until FIFO not full */
while (((ip3106_fifo(UART_BASE, kdb_port_info.port) & IP3106_UART_FIFO_TXFIFO) >> 16) >= 16)
;
/* Send one char */
ip3106_fifo(UART_BASE, kdb_port_info.port) = c;
return 1;
}
char getDebugChar(void)
{
char ch;
/* Wait until there is a char in the FIFO */
while (!((ip3106_fifo(UART_BASE, kdb_port_info.port) &
IP3106_UART_FIFO_RXFIFO) >> 8))
;
/* Read one char */
ch = ip3106_fifo(UART_BASE, kdb_port_info.port) &
IP3106_UART_FIFO_RBRTHR;
/* Advance the RX FIFO read pointer */
ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_NEXT;
return (ch);
}
void rs_disable_debug_interrupts(void)
{
ip3106_ien(UART_BASE, kdb_port_info.port) = 0; /* Disable all interrupts */
}
void rs_enable_debug_interrupts(void)
{
/* Clear all the transmitter FIFO counters (pointer and status) */
ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_TX_RST;
/* Clear all the receiver FIFO counters (pointer and status) */
ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_RST;
/* Clear all interrupts */
ip3106_iclr(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX |
IP3106_UART_INT_ALLTX;
ip3106_ien(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX; /* Enable RX interrupts */
}
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