diff options
Diffstat (limited to 'src/superio/smsc/dme1737/early_serial.c')
| -rw-r--r-- | src/superio/smsc/dme1737/early_serial.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/superio/smsc/dme1737/early_serial.c b/src/superio/smsc/dme1737/early_serial.c new file mode 100644 index 000000000000..f5b321e489ec --- /dev/null +++ b/src/superio/smsc/dme1737/early_serial.c @@ -0,0 +1,48 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2000 AG Electronics Ltd. + * Copyright (C) 2003-2004 Linux Networx + * Copyright (C) 2004 Tyan + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +#include <arch/io.h> +#include <device/pnp.h> +#include <stdint.h> +#include "lpc47b397.h" + +static void pnp_enter_conf_state(pnp_devfn_t dev) +{ + u16 port = dev >> 8; + outb(0x55, port); +} + +static void pnp_exit_conf_state(pnp_devfn_t dev) +{ + u16 port = dev >> 8; + outb(0xaa, port); +} + +void lpc47b397_enable_serial(pnp_devfn_t dev, u16 iobase) +{ + pnp_enter_conf_state(dev); + pnp_set_logical_device(dev); + pnp_set_enable(dev, 0); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + pnp_exit_conf_state(dev); +} |