From a257f6263b51321ecacc69ac1effbcbe2158fe15 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Fri, 8 Nov 2013 11:18:49 +0000 Subject: malta: setup super I/O UARTs 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 --- board/imgtec/malta/superio.c | 63 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 board/imgtec/malta/superio.c (limited to 'board/imgtec/malta/superio.c') diff --git a/board/imgtec/malta/superio.c b/board/imgtec/malta/superio.c new file mode 100644 index 0000000..eaa14df --- /dev/null +++ b/board/imgtec/malta/superio.c @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2013 Imagination Technologies + * Author: Paul Burton + * + * Setup code for the FDC37M817 super I/O controller + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include + +#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); +} -- cgit v1.1