| /* |
| * 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 <soc/gpio.h> |
| #include <vendorcode/google/chromeos/chromeos.h> |
| |
| /* The WP status pin lives on GPIO_SSUS_6 which is pad 36 in the SUS well. */ |
| #define WP_STATUS_PAD 36 |
| |
| #ifndef __PRE_RAM__ |
| #include <boot/coreboot_tables.h> |
| |
| void fill_lb_gpios(struct lb_gpios *gpios) |
| { |
| struct lb_gpio chromeos_gpios[] = { |
| {-1, ACTIVE_HIGH, get_write_protect_state(), "write protect"}, |
| {-1, ACTIVE_HIGH, vboot_recovery_mode_enabled(), "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_write_protect_state(void) |
| { |
| /* |
| * The vboot loader queries this function in romstage. The GPIOs have |
| * not been set up yet as that configuration is done in ramstage. The |
| * hardware defaults to an input but there is a 20K pulldown. Externally |
| * there is a 10K pullup. Disable the internal pull in romstage so that |
| * there isn't any ambiguity in the reading. |
| */ |
| #if defined(__PRE_RAM__) |
| ssus_disable_internal_pull(WP_STATUS_PAD); |
| #endif |
| |
| /* WP is enabled when the pin is reading high. */ |
| return ssus_get_gpio(WP_STATUS_PAD); |
| } |
| |
| static const struct cros_gpio cros_gpios[] = { |
| CROS_GPIO_REC_AL(CROS_GPIO_VIRTUAL, CROS_GPIO_DEVICE_NAME), |
| CROS_GPIO_WP_AH(0x2006, CROS_GPIO_DEVICE_NAME), |
| }; |
| |
| void mainboard_chromeos_acpi_generate(void) |
| { |
| chromeos_acpi_gpio_generate(cros_gpios, ARRAY_SIZE(cros_gpios)); |
| } |