1 /* 2 * Copyright (C) 2013 Imagination Technologies 3 * Author: Paul Burton <paul.burton@imgtec.com> 4 * 5 * Setup code for the FDC37M817 super I/O controller 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <asm/io.h> 12 13 #define SIO_CONF_PORT 0x3f0 14 #define SIO_DATA_PORT 0x3f1 15 16 enum sio_conf_key { 17 SIOCONF_DEVNUM = 0x07, 18 SIOCONF_ACTIVATE = 0x30, 19 SIOCONF_ENTER_SETUP = 0x55, 20 SIOCONF_BASE_HIGH = 0x60, 21 SIOCONF_BASE_LOW = 0x61, 22 SIOCONF_PRIMARY_INT = 0x70, 23 SIOCONF_EXIT_SETUP = 0xaa, 24 SIOCONF_MODE = 0xf0, 25 }; 26 27 static struct { 28 u8 key; 29 u8 data; 30 } sio_config[] = { 31 /* tty0 */ 32 { SIOCONF_DEVNUM, 0x04 }, 33 { SIOCONF_BASE_HIGH, 0x03 }, 34 { SIOCONF_BASE_LOW, 0xf8 }, 35 { SIOCONF_MODE, 0x02 }, 36 { SIOCONF_PRIMARY_INT, 0x04 }, 37 { SIOCONF_ACTIVATE, 0x01 }, 38 39 /* tty1 */ 40 { SIOCONF_DEVNUM, 0x05 }, 41 { SIOCONF_BASE_HIGH, 0x02 }, 42 { SIOCONF_BASE_LOW, 0xf8 }, 43 { SIOCONF_MODE, 0x02 }, 44 { SIOCONF_PRIMARY_INT, 0x03 }, 45 { SIOCONF_ACTIVATE, 0x01 }, 46 }; 47 48 void malta_superio_init(void) 49 { 50 unsigned i; 51 52 /* enter config state */ 53 outb(SIOCONF_ENTER_SETUP, SIO_CONF_PORT); 54 55 /* configure peripherals */ 56 for (i = 0; i < ARRAY_SIZE(sio_config); i++) { 57 outb(sio_config[i].key, SIO_CONF_PORT); 58 outb(sio_config[i].data, SIO_DATA_PORT); 59 } 60 61 /* exit config state */ 62 outb(SIOCONF_EXIT_SETUP, SIO_CONF_PORT); 63 } 64