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