src/mainboard/google/gru/chromeos.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootmode.h>
   4 #include <boot/coreboot_tables.h>
   5 #include <drivers/tpm/cr50.h>
   6 #include <gpio.h>
   7
   8 #include "board.h"
   9
  10 static const uint32_t wp_polarity = CONFIG(GRU_BASEBOARD_SCARLET) ?
  11                                     ACTIVE_LOW : ACTIVE_HIGH;
  12
  13 int get_write_protect_state(void)
  14 {
  15         return gpio_get(GPIO_WP) ^ !wp_polarity;
  16 }
  17
  18 void fill_lb_gpios(struct lb_gpios *gpios)
  19 {
  20         struct lb_gpio chromeos_gpios[] = {
  21 #if CONFIG(GRU_BASEBOARD_SCARLET)
  22                 {GPIO_BACKLIGHT.raw, ACTIVE_HIGH, -1, "backlight"},
  23 #endif
  24                 {GPIO_EC_IN_RW.raw, ACTIVE_HIGH, -1, "EC in RW"},
  25                 {GPIO_EC_IRQ.raw, ACTIVE_LOW, -1, "EC interrupt"},
  26                 {GPIO_RESET.raw, ACTIVE_HIGH, -1, "reset"},
  27                 {GPIO_SPK_PA_EN.raw, ACTIVE_HIGH, -1, "speaker enable"},
  28 #if CONFIG(GRU_HAS_TPM2)
  29                 {GPIO_TPM_IRQ.raw, ACTIVE_HIGH, -1, "TPM interrupt"},
  30 #endif
  31         };
  32
  33         lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
  34 }
  35
  36 void setup_chromeos_gpios(void)
  37 {
  38         if (CONFIG(GRU_BASEBOARD_SCARLET))
  39                 gpio_input(GPIO_WP);
  40         else
  41                 gpio_input_pullup(GPIO_WP);
  42         gpio_input_pullup(GPIO_EC_IN_RW);
  43         gpio_input_pullup(GPIO_EC_IRQ);
  44 }
  45
  46 #if CONFIG(GRU_HAS_TPM2)
  47 int cr50_plat_irq_status(void)
  48 {
  49         return gpio_irq_status(GPIO_TPM_IRQ);
  50 }
  51 #endif
  52
  53 int get_ec_is_trusted(void)
  54 {
  55         /* EC is trusted if not in RW. */
  56         return !gpio_get(GPIO_EC_IN_RW);
  57 }