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Diffstat (limited to 'src/mainboard/google/bolt/chromeos.c')
| -rw-r--r-- | src/mainboard/google/bolt/chromeos.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/src/mainboard/google/bolt/chromeos.c b/src/mainboard/google/bolt/chromeos.c new file mode 100644 index 0000000000..76f2c313c8 --- /dev/null +++ b/src/mainboard/google/bolt/chromeos.c @@ -0,0 +1,117 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Google 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; 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 <string.h> +#include <vendorcode/google/chromeos/chromeos.h> +#include <arch/io.h> +#include <device/device.h> +#include <device/pci.h> +#include <southbridge/intel/lynxpoint/pch.h> + +#if CONFIG_EC_GOOGLE_CHROMEEC +#include "ec.h" +#include <ec/google/chromeec/ec.h> +#endif + +/* SPI Write protect is GPIO 16 */ +#define CROS_WP_GPIO 16 + +#ifndef __PRE_RAM__ +#include <boot/coreboot_tables.h> + +#define GPIO_COUNT 6 +#define ACTIVE_LOW 0 +#define ACTIVE_HIGH 1 + +static int get_lid_switch(void) +{ +#if CONFIG_EC_GOOGLE_CHROMEEC + u8 ec_switches = inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); + + return !!(ec_switches & EC_SWITCH_LID_OPEN); +#else + return 0; +#endif +} + +static void fill_lb_gpio(struct lb_gpio *gpio, int num, + int polarity, const char *name, int force) +{ + memset(gpio, 0, sizeof(*gpio)); + gpio->port = num; + gpio->polarity = polarity; + if (force >= 0) + gpio->value = force; + else if (num >= 0) + gpio->value = get_gpio(num); + strncpy((char *)gpio->name, name, GPIO_MAX_NAME_LENGTH); +} + +void fill_lb_gpios(struct lb_gpios *gpios) +{ + struct lb_gpio *gpio; + + gpios->size = sizeof(*gpios) + (GPIO_COUNT * sizeof(struct lb_gpio)); + gpios->count = GPIO_COUNT; + + gpio = gpios->gpios; + fill_lb_gpio(gpio++, CROS_WP_GPIO, ACTIVE_HIGH, "write protect", 0); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "recovery", + get_recovery_mode_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "developer", + get_developer_mode_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "lid", + get_lid_switch()); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "power", 0); + fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "oprom", oprom_is_loaded); +} +#endif + +/* The dev-switch is virtual */ +int get_developer_mode_switch(void) +{ + return 0; +} + +/* There are actually two recovery switches. One is the magic keyboard chord, + * the other is driven by Servo. */ +int get_recovery_mode_switch(void) +{ +#if CONFIG_EC_GOOGLE_CHROMEEC + u8 ec_switches = inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); + u32 ec_events; + + /* If a switch is set, we don't need to look at events. */ + if (ec_switches & (EC_SWITCH_DEDICATED_RECOVERY)) + return 1; + + /* Else check if the EC has posted the keyboard recovery event. */ + ec_events = google_chromeec_get_events_b(); + + return !!(ec_events & + EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)); +#else + return 0; +#endif +} + +int get_write_protect_state(void) +{ + return get_gpio(CROS_WP_GPIO); +} |