kernel-ark/arch/mips/sgi-ip27/ip27-console.c
Ralf Baechle 01d42abdf3 Using get_nasid() to find the console node will blow up nicely if
called on a another node than the console node, so use the master_nasid
instead and in the unlikely case that one isn't initialized yet, fall
back to get_nasid().

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2005-10-29 19:31:31 +01:00

79 lines
1.7 KiB
C

/*
* 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) 2001, 2002 Ralf Baechle
*/
#include <linux/init.h>
#include <linux/console.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/termios.h>
#include <linux/sched.h>
#include <linux/tty.h>
#include <asm/page.h>
#include <asm/semaphore.h>
#include <asm/sn/addrs.h>
#include <asm/sn/sn0/hub.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/ioc3.h>
#include <asm/sn/sn_private.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#define IOC3_CLK (22000000 / 3)
#define IOC3_FLAGS (0)
static inline struct ioc3_uartregs *console_uart(void)
{
struct ioc3 *ioc3;
nasid_t nasid;
nasid = (master_nasid == INVALID_NASID) ? get_nasid() : master_nasid;
ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(nasid)->memory_base;
return &ioc3->sregs.uarta;
}
void prom_putchar(char c)
{
struct ioc3_uartregs *uart = console_uart();
while ((uart->iu_lsr & 0x20) == 0);
uart->iu_thr = c;
}
char __init prom_getchar(void)
{
return 0;
}
static void inline ioc3_console_probe(void)
{
struct uart_port up;
/*
* Register to interrupt zero because we share the interrupt with
* the serial driver which we don't properly support yet.
*/
memset(&up, 0, sizeof(up));
up.membase = (unsigned char *) console_uart();
up.irq = 0;
up.uartclk = IOC3_CLK;
up.regshift = 0;
up.iotype = UPIO_MEM;
up.flags = IOC3_FLAGS;
up.line = 0;
if (early_serial_setup(&up))
printk(KERN_ERR "Early serial init of port 0 failed\n");
}
__init void ip27_setup_console(void)
{
ioc3_console_probe();
}