2 * This file is part of the coreboot project.
4 * Copyright (C) 2000 AG Electronics Ltd.
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.
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.
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
21 #include <arch/romcc_io.h>
24 #define PM_DEV PNP_DEV(0x2e, PC97317_PM)
27 /* The PC97317 needs clocks to be set up before the serial port will operate. */
28 static void pc97317_enable_serial(device_t dev, u16 iobase)
30 /* Set base address of power management unit. */
31 pnp_set_logical_device(PM_DEV);
32 pnp_set_enable(dev, 0);
33 pnp_set_iobase(dev, PNP_IDX_IO0, PM_BASE);
34 pnp_set_enable(dev, 1);
36 /* Use on-chip clock multiplier. */
38 outb(inb(PM_BASE + 1) | 0x07, PM_BASE + 1);
40 /* Wait for the clock to stabilise. */
41 while(!(inb(PM_BASE + 1) & 0x80))
44 /* Set the base address of the port. */
45 pnp_set_logical_device(dev);
46 pnp_set_enable(dev, 0);
47 pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
48 pnp_set_enable(dev, 1);