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malta: setup super I/O UARTs

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On a real Malta the Super I/O needs to be configured before we are able
to access the UARTs. This patch performs that configuration, setting up
the UARTs in the same way that YAMON would.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
This commit is contained in:
Paul Burton 2013-11-08 11:18:49 +00:00 committed by Daniel Schwierzeck
parent 7a9d109b00
commit a257f6263b
4 changed files with 89 additions and 0 deletions
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1
board/imgtec/malta/Makefile
View file

@ -7,3 +7,4 @@
obj-y = malta.o
obj-y += lowlevel_init.o
obj-y += superio.o

10
board/imgtec/malta/malta.c
View file

@ -12,6 +12,8 @@
#include <asm/malta.h>
#include <pci_gt64120.h>
#include "superio.h"
phys_size_t initdram(int board_type)
{
return CONFIG_SYS_MEM_SIZE;
@ -36,6 +38,14 @@ void _machine_restart(void)
__raw_writel(GORESET, reset_base);
}
int board_early_init_f(void)
{
/* setup FDC37M817 super I/O controller */
malta_superio_init((void *)CKSEG1ADDR(MALTA_IO_PORT_BASE));
return 0;
}
void pci_init_board(void)
{
set_io_port_base(CKSEG1ADDR(MALTA_IO_PORT_BASE));

63
board/imgtec/malta/superio.c Normal file
View file

@ -0,0 +1,63 @@
/*
* Copyright (C) 2013 Imagination Technologies
* Author: Paul Burton <paul.burton@imgtec.com>
*
* Setup code for the FDC37M817 super I/O controller
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#define SIO_CONF_PORT 0x3f0
#define SIO_DATA_PORT 0x3f1
enum sio_conf_key {
SIOCONF_DEVNUM = 0x07,
SIOCONF_ACTIVATE = 0x30,
SIOCONF_ENTER_SETUP = 0x55,
SIOCONF_BASE_HIGH = 0x60,
SIOCONF_BASE_LOW = 0x61,
SIOCONF_PRIMARY_INT = 0x70,
SIOCONF_EXIT_SETUP = 0xaa,
SIOCONF_MODE = 0xf0,
};
static struct {
u8 key;
u8 data;
} sio_config[] = {
/* tty0 */
{ SIOCONF_DEVNUM, 0x04 },
{ SIOCONF_BASE_HIGH, 0x03 },
{ SIOCONF_BASE_LOW, 0xf8 },
{ SIOCONF_MODE, 0x02 },
{ SIOCONF_PRIMARY_INT, 0x04 },
{ SIOCONF_ACTIVATE, 0x01 },
/* tty1 */
{ SIOCONF_DEVNUM, 0x05 },
{ SIOCONF_BASE_HIGH, 0x02 },
{ SIOCONF_BASE_LOW, 0xf8 },
{ SIOCONF_MODE, 0x02 },
{ SIOCONF_PRIMARY_INT, 0x03 },
{ SIOCONF_ACTIVATE, 0x01 },
};
void malta_superio_init(void *io_base)
{
unsigned i;
/* enter config state */
writeb(SIOCONF_ENTER_SETUP, io_base + SIO_CONF_PORT);
/* configure peripherals */
for (i = 0; i < ARRAY_SIZE(sio_config); i++) {
writeb(sio_config[i].key, io_base + SIO_CONF_PORT);
writeb(sio_config[i].data, io_base + SIO_DATA_PORT);
}
/* exit config state */
writeb(SIOCONF_EXIT_SETUP, io_base + SIO_CONF_PORT);
}

15
board/imgtec/malta/superio.h Normal file
View file

@ -0,0 +1,15 @@
/*
* Copyright (C) 2013 Imagination Technologies
* Author: Paul Burton <paul.burton@imgtec.com>
*
* Setup code for the FDC37M817 super I/O controller
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __BOARD_MALTA_SUPERIO_H__
#define __BOARD_MALTA_SUPERIO_H__
extern void malta_superio_init(void *io_base);
#endif /* __BOARD_MALTA_SUPERIO_H__ */