1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2013 Imagination Technologies
4 * Author: Paul Burton <paul.burton@mips.com>
5 *
6 * Setup code for the FDC37M817 super I/O controller
7 */
8
9 #include <common.h>
10 #include <asm/io.h>
11
12 #define SIO_CONF_PORT 0x3f0
13 #define SIO_DATA_PORT 0x3f1
14
15 enum sio_conf_key {
16 SIOCONF_DEVNUM = 0x07,
17 SIOCONF_ACTIVATE = 0x30,
18 SIOCONF_ENTER_SETUP = 0x55,
19 SIOCONF_BASE_HIGH = 0x60,
20 SIOCONF_BASE_LOW = 0x61,
21 SIOCONF_PRIMARY_INT = 0x70,
22 SIOCONF_EXIT_SETUP = 0xaa,
23 SIOCONF_MODE = 0xf0,
24 };
25
26 static struct {
27 u8 key;
28 u8 data;
29 } sio_config[] = {
30 /* tty0 */
31 { SIOCONF_DEVNUM, 0x04 },
32 { SIOCONF_BASE_HIGH, 0x03 },
33 { SIOCONF_BASE_LOW, 0xf8 },
34 { SIOCONF_MODE, 0x02 },
35 { SIOCONF_PRIMARY_INT, 0x04 },
36 { SIOCONF_ACTIVATE, 0x01 },
37
38 /* tty1 */
39 { SIOCONF_DEVNUM, 0x05 },
40 { SIOCONF_BASE_HIGH, 0x02 },
41 { SIOCONF_BASE_LOW, 0xf8 },
42 { SIOCONF_MODE, 0x02 },
43 { SIOCONF_PRIMARY_INT, 0x03 },
44 { SIOCONF_ACTIVATE, 0x01 },
45 };
46
malta_superio_init(void)47 void malta_superio_init(void)
48 {
49 unsigned i;
50
51 /* enter config state */
52 outb(SIOCONF_ENTER_SETUP, SIO_CONF_PORT);
53
54 /* configure peripherals */
55 for (i = 0; i < ARRAY_SIZE(sio_config); i++) {
56 outb(sio_config[i].key, SIO_CONF_PORT);
57 outb(sio_config[i].data, SIO_DATA_PORT);
58 }
59
60 /* exit config state */
61 outb(SIOCONF_EXIT_SETUP, SIO_CONF_PORT);
62 }
63