85836c2215
The romstage component of Super I/O support is in fact written around
passing a lower and upper half packed integer. We currently have two
typedef's for this, 'device_t' and 'pnp_devfn_t'. We wish to make use of
'pnp_devfn_t' over 'device_t' as 'device_t' changes it's typedef in the
ramstage context and so is really a conflicting definition. This helps
solve problems down the road to having the 'real' 'device_t' definition
usable in romstage later.
This follows on from the rational given in:
c2956e7 device/pci_early.c: Mixes up variants of a typedefs to 'u32'
Change-Id: Ia9f238ebb944f9fe7b274621ee0c09a6de288a76
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6231
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2008 Arastra, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <arch/io.h>
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#include "i3100.h"
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static void pnp_enter_ext_func_mode(pnp_devfn_t dev)
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{
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u16 port = dev >> 8;
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outb(0x80, port);
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outb(0x86, port);
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}
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static void pnp_exit_ext_func_mode(pnp_devfn_t dev)
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{
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u16 port = dev >> 8;
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outb(0x68, port);
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outb(0x08, port);
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}
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/* Enable device interrupts, set UART_CLK predivide. */
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static void i3100_configure_uart_clk(pnp_devfn_t dev, u8 predivide)
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{
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pnp_enter_ext_func_mode(dev);
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pnp_write_config(dev, I3100_SIW_CONFIGURATION, (predivide << 2) | 1);
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pnp_exit_ext_func_mode(dev);
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}
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static void i3100_enable_serial(pnp_devfn_t dev, u16 iobase)
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{
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pnp_enter_ext_func_mode(dev);
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pnp_set_logical_device(dev);
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pnp_set_enable(dev, 0);
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pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
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pnp_set_enable(dev, 1);
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pnp_exit_ext_func_mode(dev);
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}
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