2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
5 * ########################################################################
7 * This program is free software; you can distribute it and/or modify it
8 * under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
20 * ########################################################################
22 * This is the interface to the remote debugger stub.
25 #include <linux/types.h>
26 #include <linux/serial.h>
27 #include <linux/serialP.h>
28 #include <linux/serial_reg.h>
29 #include <linux/serial_ip3106.h>
31 #include <asm/serial.h>
36 static struct serial_state rs_table[IP3106_NR_PORTS] = {
38 static struct async_struct kdb_port_info = {0};
40 void rs_kgdb_hook(int tty_no)
42 struct serial_state *ser = &rs_table[tty_no];
44 kdb_port_info.state = ser;
45 kdb_port_info.magic = SERIAL_MAGIC;
46 kdb_port_info.port = tty_no;
47 kdb_port_info.flags = ser->flags;
50 * Clear all interrupts
52 /* Clear all the transmitter FIFO counters (pointer and status) */
53 ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_TX_RST;
54 /* Clear all the receiver FIFO counters (pointer and status) */
55 ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_RX_RST;
56 /* Clear all interrupts */
57 ip3106_iclr(UART_BASE, tty_no) = IP3106_UART_INT_ALLRX |
58 IP3106_UART_INT_ALLTX;
61 * Now, initialize the UART
63 ip3106_lcr(UART_BASE, tty_no) = IP3106_UART_LCR_8BIT;
64 ip3106_baud(UART_BASE, tty_no) = 5; // 38400 Baud
67 int putDebugChar(char c)
69 /* Wait until FIFO not full */
70 while (((ip3106_fifo(UART_BASE, kdb_port_info.port) & IP3106_UART_FIFO_TXFIFO) >> 16) >= 16)
73 ip3106_fifo(UART_BASE, kdb_port_info.port) = c;
78 char getDebugChar(void)
82 /* Wait until there is a char in the FIFO */
83 while (!((ip3106_fifo(UART_BASE, kdb_port_info.port) &
84 IP3106_UART_FIFO_RXFIFO) >> 8))
87 ch = ip3106_fifo(UART_BASE, kdb_port_info.port) &
88 IP3106_UART_FIFO_RBRTHR;
89 /* Advance the RX FIFO read pointer */
90 ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_NEXT;
94 void rs_disable_debug_interrupts(void)
96 ip3106_ien(UART_BASE, kdb_port_info.port) = 0; /* Disable all interrupts */
99 void rs_enable_debug_interrupts(void)
101 /* Clear all the transmitter FIFO counters (pointer and status) */
102 ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_TX_RST;
103 /* Clear all the receiver FIFO counters (pointer and status) */
104 ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_RST;
105 /* Clear all interrupts */
106 ip3106_iclr(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX |
107 IP3106_UART_INT_ALLTX;
108 ip3106_ien(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX; /* Enable RX interrupts */