1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001, 2002 Ralf Baechle
7 */
8#include <linux/init.h>
9#include <linux/console.h>
10#include <linux/kdev_t.h>
11#include <linux/major.h>
12#include <linux/serial.h>
13#include <asm/page.h>
14#include <asm/sn/addrs.h>
15#include <asm/sn/sn0/hub.h>
16#include <asm/sn/klconfig.h>
17#include <asm/sn/ioc3.h>
18#include <asm/sn/sn_private.h>
19
20#define IOC3_BAUD (22000000 / (3*16))
21#define IOC3_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
22
23static inline struct ioc3_uartregs *console_uart(void)
24{
25	struct ioc3 *ioc3;
26
27	ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(get_nasid())->memory_base;
28
29	return &ioc3->sregs.uarta;
30}
31
32void prom_putchar(char c)
33{
34	struct ioc3_uartregs *uart = console_uart();
35
36	while ((uart->iu_lsr & 0x20) == 0);
37	uart->iu_thr = c;
38}
39
40char __init prom_getchar(void)
41{
42	return 0;
43}
44
45static void inline ioc3_console_probe(void)
46{
47	struct serial_struct req;
48
49	/* Register to interrupt zero because we share the interrupt with
50	   the serial driver which we don't properly support yet.  */
51	memset(&req, 0, sizeof(req));
52	req.irq             = 0;
53	req.flags           = IOC3_COM_FLAGS;
54	req.io_type         = SERIAL_IO_MEM;
55	req.iomem_reg_shift = 0;
56	req.baud_base       = IOC3_BAUD;
57
58	req.iomem_base      = (unsigned char *) console_uart();
59	register_serial(&req);
60}
61
62__init void ip27_setup_console(void)
63{
64	ioc3_console_probe();
65}
66