diff options
Diffstat (limited to 'src/superio/serverengines/pilot/early_serial.c')
-rw-r--r-- | src/superio/serverengines/pilot/early_serial.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/src/superio/serverengines/pilot/early_serial.c b/src/superio/serverengines/pilot/early_serial.c new file mode 100644 index 0000000000..a2bbec481e --- /dev/null +++ b/src/superio/serverengines/pilot/early_serial.c @@ -0,0 +1,57 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2009 University of Heidelberg + * Written by Mondrian Nuessle <nuessle@uni-heidelberg.de> for Univ. Heidelberg + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* PILOT Super I/O is only based on LPC observation done on factory system. */ + +#include <arch/romcc_io.h> +#include "pilot.h" + +/* Pilot uses 0x5A/0xA5 pattern to actiavte deactivate config access. */ +static void pnp_enter_ext_func_mode(device_t dev) +{ + u16 port = dev >> 8; + outb(0x5A, port); +} + +static void pnp_exit_ext_func_mode(device_t dev) +{ + u16 port = dev >> 8; + outb(0xA5, port); +} + +/* Serial config is a fairly standard procedure. */ +static void pilot_enable_serial(device_t dev, u16 iobase) +{ + pnp_enter_ext_func_mode(dev); + pnp_set_logical_device(dev); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + pnp_exit_ext_func_mode(dev); +} + +static void pilot_disable_serial(device_t dev) +{ + pnp_enter_ext_func_mode(dev); + pnp_set_logical_device(dev); + pnp_set_iobase(dev, PNP_IDX_IO0, 0x0000); + pnp_set_enable(dev, 0); + pnp_exit_ext_func_mode(dev); +} |