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superio/intel: Add i8900 device 

The Intel i8900 Super I/O is similar to the previously
supported i3100.

Change-Id: I9a5b651cab35991c3c3e09fc4668d35ca2d221ba
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/12169
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: York Yang <york.yang@intel.com>
This commit is contained in:
Marc Jones 2015-09-23 16:19:11 -06:00 committed by Martin Roth
parent 31f4d00c95
commit cb492da913
6 changed files with 245 additions and 0 deletions
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3
src/superio/intel/Kconfig
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@ -15,3 +15,6 @@
config SUPERIO_INTEL_I3100
bool
config SUPERIO_INTEL_I8900
bool

1
src/superio/intel/Makefile.inc
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@ -14,3 +14,4 @@
##
subdirs-y += i3100
subdirs-y += i8900

22
src/superio/intel/i8900/Makefile.inc Normal file
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@ -0,0 +1,22 @@
##
## This file is part of the coreboot project.
##
## Copyright (C) 2008 Arastra, Inc.
##
## 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.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc.
##
romstage-$(CONFIG_SUPERIO_INTEL_I8900) += early_serial.c
ramstage-$(CONFIG_SUPERIO_INTEL_I8900) += superio.c

69
src/superio/intel/i8900/early_serial.c Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Arastra, Inc.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <arch/io.h>
#include <device/pnp.h>
#include "i8900.h"
static void pnp_enter_ext_func_mode(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(0x80, port);
outb(0x86, port);
}
static void pnp_exit_ext_func_mode(pnp_devfn_t dev)
{
u16 port = dev >> 8;
outb(0x68, port);
outb(0x08, port);
}
/* Enable device interrupts, set UART_CLK predivide. */
void i8900_configure_uart_clk(pnp_devfn_t dev, u8 predivide)
{
pnp_enter_ext_func_mode(dev);
pnp_write_config(dev, I8900_SIW_CONFIGURATION,
(predivide << 2) | I8900_ENABLE_SIRQ);
pnp_exit_ext_func_mode(dev);
}
void i8900_enable_serial(pnp_devfn_t dev, u16 iobase)
{
pnp_enter_ext_func_mode(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
pnp_exit_ext_func_mode(dev);
}
void i8900_enable_wdt(pnp_devfn_t dev, u16 iobase)
{
/* Enable WDT */
pnp_enter_ext_func_mode(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_enable(dev, 1);
pnp_exit_ext_func_mode(dev);
}

60
src/superio/intel/i8900/i8900.h Normal file
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@ -0,0 +1,60 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Arastra, Inc.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef SUPERIO_INTEL_I8900_I8900_H
#define SUPERIO_INTEL_I8900_I8900_H
/*
* The SIW ("Serial I/O and Watchdog Timer") integrated into the i8900 is
* very similar to a Super I/O, both in functionality and config mechanism.
*
* The SIW contains:
* - UART(s)
* - Serial interrupt controller
* - Watchdog timer (WDT)
* - LPC interface
*/
/* Logical device numbers (LDNs). */
#define I8900_SP1 0x04 /* Com1 */
#define I8900_SP2 0x05 /* Com2 */
#define I8900_WDT 0x06 /* Watchdog timer */
/* Registers and bit definitions: */
#define I8900_SIW_CONFIGURATION 0x29
/*
* SIW_CONFIGURATION[3:2] = UART_CLK predivide
* 00: divide by 1
* 01: divide by 8
* 10: divide by 26
* 11: reserved
*/
#define I8900_UART_CLK_PREDIVIDE_1 0x00
#define I8900_UART_CLK_PREDIVIDE_8 0x01
#define I8900_UART_CLK_PREDIVIDE_26 0x02
#define I8900_ENABLE_SIRQ 0x01
void i8900_configure_uart_clk(device_t dev, u8 predivide);
void i8900_enable_serial(device_t dev, u16 iobase);
void i8900_enable_wdt(device_t dev, u16 iobase);
#endif

90
src/superio/intel/i8900/superio.c Normal file
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@ -0,0 +1,90 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008 Arastra, Inc.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc.
*/
#include <stdlib.h>
#include <device/device.h>
#include <device/pnp.h>
#include <drivers/uart/uart8250reg.h>
#include "i8900.h"
#include <arch/io.h>
static void pnp_enter_ext_func_mode(struct device *dev)
{
outb(0x80, dev->path.pnp.port);
outb(0x86, dev->path.pnp.port);
}
static void pnp_exit_ext_func_mode(struct device *dev)
{
outb(0x68, dev->path.pnp.port);
outb(0x08, dev->path.pnp.port);
}
static void i8900_init(struct device *dev)
{
if (!dev->enabled)
return;
}
static void i8900_pnp_set_resources(struct device *dev)
{
pnp_enter_ext_func_mode(dev);
pnp_set_resources(dev);
pnp_exit_ext_func_mode(dev);
}
static void i8900_pnp_enable_resources(struct device *dev)
{
pnp_enter_ext_func_mode(dev);
pnp_enable_resources(dev);
pnp_exit_ext_func_mode(dev);
}
static void i8900_pnp_enable(struct device *dev)
{
pnp_enter_ext_func_mode(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, !!dev->enabled);
pnp_exit_ext_func_mode(dev);
}
static struct device_operations ops = {
.read_resources = pnp_read_resources,
.set_resources = i8900_pnp_set_resources,
.enable_resources = i8900_pnp_enable_resources,
.enable = i8900_pnp_enable,
.init = i8900_init,
};
static struct pnp_info pnp_dev_info[] = {
{ &ops, I8900_SP1, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, },
{ &ops, I8900_SP2, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, },
{ &ops, I8900_WDT, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, },
};
static void enable_dev(struct device *dev)
{
pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
}
struct chip_operations superio_intel_i8900_ops = {
CHIP_NAME("Intel 8900 Super I/O")
.enable_dev = enable_dev,
};