| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2014 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 <boardid.h> |
| #include <boot/coreboot_tables.h> |
| #include <console/console.h> |
| #include <ec/google/chromeec/ec.h> |
| #include <ec/google/chromeec/ec_commands.h> |
| #include <string.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| |
| #include "gpio.h" |
| |
| static inline uint32_t get_pwr_btn_polarity(void) |
| { |
| if (board_id() < BOARD_ID_PROTO_3) |
| return ACTIVE_HIGH; |
| |
| return ACTIVE_LOW; |
| } |
| |
| void fill_lb_gpios(struct lb_gpios *gpios) |
| { |
| int count = 0; |
| |
| /* Write Protect: active low */ |
| gpios->gpios[count].port = WRITE_PROTECT_L; |
| gpios->gpios[count].polarity = ACTIVE_LOW; |
| gpios->gpios[count].value = gpio_get(WRITE_PROTECT_L); |
| strncpy((char *)gpios->gpios[count].name, "write protect", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| /* Recovery: active high */ |
| gpios->gpios[count].port = -1; |
| gpios->gpios[count].polarity = ACTIVE_HIGH; |
| gpios->gpios[count].value = get_recovery_mode_switch(); |
| strncpy((char *)gpios->gpios[count].name, "recovery", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| /* TODO(adurbin): add lid switch */ |
| |
| /* Power: active low / high depending on board id */ |
| gpios->gpios[count].port = POWER_BUTTON; |
| gpios->gpios[count].polarity = get_pwr_btn_polarity(); |
| gpios->gpios[count].value = -1; |
| strncpy((char *)gpios->gpios[count].name, "power", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| /* Developer: virtual GPIO active high */ |
| gpios->gpios[count].port = -1; |
| gpios->gpios[count].polarity = ACTIVE_HIGH; |
| gpios->gpios[count].value = get_developer_mode_switch(); |
| strncpy((char *)gpios->gpios[count].name, "developer", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| /* EC in RW: active high */ |
| gpios->gpios[count].port = EC_IN_RW; |
| gpios->gpios[count].polarity = ACTIVE_HIGH; |
| gpios->gpios[count].value = -1; |
| strncpy((char *)gpios->gpios[count].name, "EC in RW", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| /* Reset: active low (output) */ |
| gpios->gpios[count].port = AP_SYS_RESET_L; |
| gpios->gpios[count].polarity = ACTIVE_LOW; |
| gpios->gpios[count].value = -1; |
| strncpy((char *)gpios->gpios[count].name, "reset", |
| GPIO_MAX_NAME_LENGTH); |
| count++; |
| |
| gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio)); |
| gpios->count = count; |
| |
| printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size); |
| } |
| |
| int get_developer_mode_switch(void) |
| { |
| return 0; |
| } |
| |
| int get_recovery_mode_switch(void) |
| { |
| uint32_t ec_events; |
| |
| ec_events = google_chromeec_get_events_b(); |
| return !!(ec_events & |
| EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY)); |
| } |
| |
| int get_write_protect_state(void) |
| { |
| return !gpio_get(WRITE_PROTECT_L); |
| } |