| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2006 Uwe Hermann <uwe@hermann-uwe.de> |
| * |
| * Copyright (C) 2007 AMD |
| * Written by Yinghai Lu <yinghai.lu@amd.com> for AMD. |
| * |
| * 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 |
| */ |
| |
| #include <arch/io.h> |
| #include "it8716f.h" |
| |
| /* The base address is 0x2e or 0x4e, depending on config bytes. */ |
| #define SIO_BASE 0x2e |
| #define SIO_INDEX SIO_BASE |
| #define SIO_DATA (SIO_BASE + 1) |
| |
| /* Global configuration registers. */ |
| #define IT8716F_CONFIG_REG_CC 0x02 /* Configure Control (write-only). */ |
| #define IT8716F_CONFIG_REG_LDN 0x07 /* Logical Device Number. */ |
| #define IT8716F_CONFIG_REG_CONFIGSEL 0x22 /* Configuration Select. */ |
| #define IT8716F_CONFIG_REG_CLOCKSEL 0x23 /* Clock Selection. */ |
| #define IT8716F_CONFIG_REG_SWSUSP 0x24 /* Software Suspend, Flash I/F. */ |
| |
| static void pnp_enter_ext_func_mode(device_t dev) |
| { |
| u16 port = dev >> 8; |
| |
| outb(0x87, port); |
| outb(0x01, port); |
| outb(0x55, port); |
| outb((port == 0x4e) ? 0xaa : 0x55, port); |
| } |
| |
| static void pnp_exit_ext_func_mode(device_t dev) |
| { |
| pnp_write_config(dev, IT8716F_CONFIG_REG_CC, 0x02); |
| } |
| |
| void it8716f_enable_serial(device_t dev, u16 iobase) |
| { |
| pnp_enter_ext_func_mode(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_ext_func_mode(dev); |
| } |