88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
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/*
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* PROM console for Cobalt Raq2
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
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* Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
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*
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*/
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/kdev_t.h>
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#include <linux/serial_reg.h>
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#include <asm/delay.h>
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#include <asm/serial.h>
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#include <asm/io.h>
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static unsigned long port = 0xc800000;
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static __inline__ void ns16550_cons_put_char(char ch, unsigned long ioaddr)
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{
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char lsr;
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do {
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lsr = inb(ioaddr + UART_LSR);
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} while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE));
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outb(ch, ioaddr + UART_TX);
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}
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static __inline__ char ns16550_cons_get_char(unsigned long ioaddr)
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{
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while ((inb(ioaddr + UART_LSR) & UART_LSR_DR) == 0)
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udelay(1);
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return inb(ioaddr + UART_RX);
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}
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void ns16550_console_write(struct console *co, const char *s, unsigned count)
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{
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char lsr, ier;
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unsigned i;
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ier = inb(port + UART_IER);
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outb(0x00, port + UART_IER);
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for (i=0; i < count; i++, s++) {
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if(*s == '\n')
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ns16550_cons_put_char('\r', port);
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ns16550_cons_put_char(*s, port);
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}
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do {
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lsr = inb(port + UART_LSR);
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} while ((lsr & (UART_LSR_TEMT | UART_LSR_THRE)) != (UART_LSR_TEMT | UART_LSR_THRE));
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outb(ier, port + UART_IER);
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}
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char getDebugChar(void)
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{
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return ns16550_cons_get_char(port);
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}
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void putDebugChar(char kgdb_char)
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{
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ns16550_cons_put_char(kgdb_char, port);
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}
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static struct console ns16550_console = {
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.name = "prom",
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.setup = NULL,
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.write = ns16550_console_write,
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.flags = CON_PRINTBUFFER,
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.index = -1,
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};
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static int __init ns16550_setup_console(void)
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{
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register_console(&ns16550_console);
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return 0;
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}
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console_initcall(ns16550_setup_console);
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