| Uwe Hermann | 3fa1363 | 2007-07-12 13:13:56 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the LinuxBIOS project. |
| 3 | * |
| 4 | * Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | #include <arch/romcc_io.h> |
| 22 | |
| 23 | /* All known/supported SMSC Super I/Os have the same logical device IDs |
| 24 | * for the serial ports (COM1, COM2). |
| 25 | */ |
| 26 | #define SMSCSUPERIO_SP1 4 /* Com1 */ |
| 27 | #define SMSCSUPERIO_SP2 5 /* Com2 */ |
| 28 | |
| 29 | /** |
| 30 | * Enable the specified serial port. |
| 31 | * |
| 32 | * @param dev The device to use. |
| 33 | * @param dev The I/O base of the serial port (usually 0x3f8/0x2f8). |
| 34 | */ |
| 35 | static inline void smscsuperio_enable_serial(device_t dev, uint16_t iobase) |
| 36 | { |
| 37 | uint16_t port = dev >> 8; |
| 38 | |
| 39 | outb(0x55, port); /* Enter the configuration state. */ |
| 40 | pnp_set_logical_device(dev); |
| 41 | pnp_set_enable(dev, 0); |
| 42 | pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| 43 | pnp_set_enable(dev, 1); |
| 44 | outb(0xaa, port); /* Exit the configuration state. */ |
| 45 | } |