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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011-2012 The ChromiumOS Authors. All rights reserved.
*
* 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; version 2 of the License.
*
* 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
*/
#include <console/console.h>
#include <string.h>
#include <vendorcode/google/chromeos/chromeos.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pci.h>
#include <southbridge/intel/bd82x6x/pch.h>
#include <ec/compal/ene932/ec.h>
#include "ec.h"
#define ACTIVE_LOW 0
#define ACTIVE_HIGH 1
#ifndef __PRE_RAM__
#include <boot/coreboot_tables.h>
#define GPIO_COUNT 6
void fill_lb_gpios(struct lb_gpios *gpios)
{
device_t dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
u16 gpio_base = pci_read_config32(dev, GPIOBASE) & 0xfffe;
u16 gen_pmcon_1 = pci_read_config32(dev, GEN_PMCON_1);
if (!gpio_base)
return;
u32 gp_lvl = inl(gpio_base + GP_LVL);
u32 gp_lvl3 = inl(gpio_base + GP_LVL3);
gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio));
gpios->count = GPIO_COUNT;
/* Write Protect: GPIO70 active high */
gpios->gpios[0].port = 70;
gpios->gpios[0].polarity = ACTIVE_LOW;
gpios->gpios[0].value = (gp_lvl3 >> (70 - 64)) & 1;
strncpy((char *)gpios->gpios[0].name,"write protect", GPIO_MAX_NAME_LENGTH);
/* Recovery: Virtual GPIO in the EC (Servo GPIO68 active low) */
gpios->gpios[1].port = -1;
gpios->gpios[1].polarity = ACTIVE_HIGH;
gpios->gpios[1].value = get_recovery_mode_switch();
strncpy((char *)gpios->gpios[1].name,"recovery", GPIO_MAX_NAME_LENGTH);
/* Developer: Virtual GPIO in the EC ( Servo GPIO17 active low) */
gpios->gpios[2].port = -1;
gpios->gpios[2].polarity = ACTIVE_HIGH;
gpios->gpios[2].value = get_developer_mode_switch();
strncpy((char *)gpios->gpios[2].name,"developer", GPIO_MAX_NAME_LENGTH);
/* Lid switch GPIO active high (open). */
gpios->gpios[3].port = 15;
gpios->gpios[3].polarity = ACTIVE_HIGH;
gpios->gpios[3].value = ((gp_lvl >> 15) & 1);;
strncpy((char *)gpios->gpios[3].name,"lid", GPIO_MAX_NAME_LENGTH);
/* Power Button */
gpios->gpios[4].port = 101;
gpios->gpios[4].polarity = ACTIVE_LOW;
gpios->gpios[4].value = (gen_pmcon_1 >> 9) & 1;
strncpy((char *)gpios->gpios[4].name,"power", GPIO_MAX_NAME_LENGTH);
/* Did we load the VGA Option ROM? */
gpios->gpios[5].port = -1; /* Indicate that this is a pseudo GPIO */
gpios->gpios[5].polarity = ACTIVE_HIGH;
gpios->gpios[5].value = oprom_is_loaded;
strncpy((char *)gpios->gpios[5].name,"oprom", GPIO_MAX_NAME_LENGTH);
}
#endif
int get_developer_mode_switch(void)
{
device_t dev;
#ifdef __PRE_RAM__
dev = PCI_DEV(0, 0x1f, 0);
#else
dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
#endif
u16 gpio_base = pci_read_config32(dev, GPIOBASE) & 0xfffe;
if (!gpio_base)
return(0);
/*
* Dev mode is controled by EC and uboot stores a flag in TPM. This GPIO is only
* for the debug header. It is AND'd to the EC request.
*/
u32 gp_lvl = inl(gpio_base + GP_LVL);
printk(BIOS_DEBUG,"DEV MODE GPIO 17: %x\n", !((gp_lvl >> 17) & 1));
/* GPIO17, active low -- return active high reading and let
* it be inverted by the caller if needed. */
return !((gp_lvl >> 17) & 1);
}
int get_recovery_mode_switch(void)
{
u8 rec_mode;
device_t dev;
#ifdef __PRE_RAM__
dev = PCI_DEV(0, 0x1f, 0);
#else
dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
#endif
u16 gpio_base = pci_read_config32(dev, GPIOBASE) & 0xfffe;
if (!gpio_base)
return(0);
/* GPIO68, active low. For Servo support
* Treat as active high and let the caller invert if needed. */
u32 gp_lvl3 = inl(gpio_base + GP_LVL3);
rec_mode = !((gp_lvl3 >> (68 - 64)) & 1);
printk(BIOS_DEBUG,"REC MODE GPIO 68: %x\n", rec_mode);
return (rec_mode);
}
int parrot_ec_running_ro(void)
{
device_t dev;
#ifdef __PRE_RAM__
dev = PCI_DEV(0, 0x1f, 0);
#else
dev = dev_find_slot(0, PCI_DEVFN(0x1f,0));
#endif
u16 gpio_base = pci_read_config32(dev, GPIOBASE) & 0xfffe;
if (!gpio_base)
return(0);
/* GPIO68 EC_RW is active low.
* Treat as active high and let the caller invert if needed. */
u32 gp_lvl3 = inl(gpio_base + GP_LVL3);
return !((gp_lvl3 >> (68 - 64)) & 1);
}
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