| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <bootmode.h> |
| #include <boot/coreboot_tables.h> |
| #include <soc/gpio.h> |
| #include <types.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 |
| |
| /* The EC_IN_RW lives on SCGPIO59 */ |
| #define EC_IN_RW_PAD 59 |
| |
| void fill_lb_gpios(struct lb_gpios *gpios) |
| { |
| struct lb_gpio chromeos_gpios[] = { |
| {-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)); |
| } |
| |
| 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 (ENV_ROMSTAGE) |
| ssus_disable_internal_pull(WP_STATUS_PAD); |
| |
| /* 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), |
| }; |
| |
| const struct cros_gpio *variant_cros_gpios(size_t *num) |
| { |
| *num = ARRAY_SIZE(cros_gpios); |
| return cros_gpios; |
| } |
| |
| int get_ec_is_trusted(void) |
| { |
| /* EC is trusted if not in RW. */ |
| return !score_get_gpio(EC_IN_RW_PAD); |
| } |