| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2000 AG Electronics Ltd. |
| * |
| * 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. |
| */ |
| |
| #include <arch/io.h> |
| #include <device/pnp.h> |
| #include <stdint.h> |
| #include "pc97317.h" |
| |
| #define PM_DEV PNP_DEV(0x2e, PC97317_PM) |
| #define PM_BASE 0xe8 |
| |
| /* The PC97317 needs clocks to be set up before the serial port will operate. */ |
| void pc97317_enable_serial(pnp_devfn_t dev, u16 iobase) |
| { |
| /* Set base address of power management unit. */ |
| pnp_set_logical_device(PM_DEV); |
| pnp_set_enable(dev, 0); |
| pnp_set_iobase(dev, PNP_IDX_IO0, PM_BASE); |
| pnp_set_enable(dev, 1); |
| |
| /* Use on-chip clock multiplier. */ |
| outb(0x03, PM_BASE); |
| outb(inb(PM_BASE + 1) | 0x07, PM_BASE + 1); |
| |
| /* Wait for the clock to stabilise. */ |
| while(!(inb(PM_BASE + 1) & 0x80)) |
| ; |
| |
| /* Set the base address of the port. */ |
| pnp_set_logical_device(dev); |
| pnp_set_enable(dev, 0); |
| pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| pnp_set_enable(dev, 1); |
| } |