| Marc Jones | cb492da | 2015-09-23 16:19:11 -0600 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2008 Arastra, Inc. |
| 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. |
| 19 | */ |
| 20 | |
| 21 | #include <arch/io.h> |
| 22 | #include <device/pnp.h> |
| 23 | #include "i8900.h" |
| 24 | |
| 25 | static void pnp_enter_ext_func_mode(pnp_devfn_t dev) |
| 26 | { |
| 27 | u16 port = dev >> 8; |
| 28 | |
| 29 | outb(0x80, port); |
| 30 | outb(0x86, port); |
| 31 | } |
| 32 | |
| 33 | static void pnp_exit_ext_func_mode(pnp_devfn_t dev) |
| 34 | { |
| 35 | u16 port = dev >> 8; |
| 36 | |
| 37 | outb(0x68, port); |
| 38 | outb(0x08, port); |
| 39 | } |
| 40 | |
| 41 | /* Enable device interrupts, set UART_CLK predivide. */ |
| 42 | void i8900_configure_uart_clk(pnp_devfn_t dev, u8 predivide) |
| 43 | { |
| 44 | pnp_enter_ext_func_mode(dev); |
| 45 | pnp_write_config(dev, I8900_SIW_CONFIGURATION, |
| 46 | (predivide << 2) | I8900_ENABLE_SIRQ); |
| 47 | pnp_exit_ext_func_mode(dev); |
| 48 | } |
| 49 | |
| 50 | void i8900_enable_serial(pnp_devfn_t dev, u16 iobase) |
| 51 | { |
| 52 | pnp_enter_ext_func_mode(dev); |
| 53 | pnp_set_logical_device(dev); |
| 54 | pnp_set_enable(dev, 0); |
| 55 | pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| 56 | pnp_set_enable(dev, 1); |
| 57 | pnp_exit_ext_func_mode(dev); |
| 58 | } |
| 59 | |
| 60 | void i8900_enable_wdt(pnp_devfn_t dev, u16 iobase) |
| 61 | { |
| 62 | /* Enable WDT */ |
| 63 | pnp_enter_ext_func_mode(dev); |
| 64 | pnp_set_logical_device(dev); |
| 65 | pnp_set_enable(dev, 0); |
| 66 | pnp_set_iobase(dev, PNP_IDX_IO0, iobase); |
| 67 | pnp_set_enable(dev, 1); |
| 68 | pnp_exit_ext_func_mode(dev); |
| 69 | } |