| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2013 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. |
| */ |
| |
| #include <string.h> |
| #include <bootmode.h> |
| #include <arch/io.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <console/console.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <ec/google/chromeec/ec_commands.h> |
| #include <soc/gpio.h> |
| |
| |
| /* SPI Write protect is GPIO 16 */ |
| #define CROS_WP_GPIO 16 |
| |
| #ifndef __PRE_RAM__ |
| #include <boot/coreboot_tables.h> |
| |
| void fill_lb_gpios(struct lb_gpios *gpios) |
| { |
| struct lb_gpio chromeos_gpios[] = { |
| {CROS_WP_GPIO, ACTIVE_HIGH, 0, "write protect"}, |
| {-1, ACTIVE_HIGH, get_recovery_mode_switch(), "recovery"}, |
| {-1, ACTIVE_HIGH, get_developer_mode_switch(), "developer"}, |
| {-1, ACTIVE_HIGH, get_lid_switch(), "lid"}, |
| {-1, ACTIVE_HIGH, 0, "power"}, |
| {-1, ACTIVE_HIGH, gfx_get_init_done(), "oprom"}, |
| }; |
| lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios)); |
| } |
| #endif |
| |
| int get_lid_switch(void) |
| { |
| u8 ec_switches = inb(EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SWITCHES); |
| |
| return !!(ec_switches & EC_SWITCH_LID_OPEN); |
| } |
| |
| /* 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 clear_recovery_mode_switch(void) |
| { |
| const uint32_t kb_rec_mask = |
| EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY); |
| |
| /* Unconditionally clear the EC recovery request. */ |
| return google_chromeec_clear_events_b(kb_rec_mask); |
| } |
| |
| int get_write_protect_state(void) |
| { |
| return get_gpio(CROS_WP_GPIO); |
| } |