src/mainboard/google/chell/chromeos.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2015 Google Inc.
   5  * Copyright (C) 2015 Intel Corporation
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <arch/io.h>
  18 #include <console/console.h>
  19 #include <device/device.h>
  20 #include <device/pci.h>
  21 #include <rules.h>
  22 #include <gpio.h>
  23 #include <soc/gpio.h>
  24 #include <string.h>
  25 #include <ec/google/chromeec/ec.h>
  26 #include <vendorcode/google/chromeos/chromeos.h>
  27
  28 #include "gpio.h"
  29 #include "ec.h"
  30
  31 #if ENV_RAMSTAGE
  32 #include <boot/coreboot_tables.h>
  33
  34 void fill_lb_gpios(struct lb_gpios *gpios)
  35 {
  36         struct lb_gpio *start_gpio = gpios->gpios;
  37         struct lb_gpio *gpio = start_gpio;
  38
  39         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "write protect",
  40                      get_write_protect_state());
  41         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "recovery",
  42                      get_recovery_mode_switch());
  43         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "developer",
  44                      get_developer_mode_switch());
  45         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "lid",
  46                      get_lid_switch());
  47         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "power", 0);
  48         fill_lb_gpio(gpio++, -1, ACTIVE_HIGH, "oprom", gfx_get_init_done());
  49         fill_lb_gpio(gpio++, GPIO_EC_IN_RW, ACTIVE_HIGH, "EC in RW",
  50                      gpio_get(GPIO_EC_IN_RW));
  51
  52         gpios->count = gpio - start_gpio;
  53         gpios->size = sizeof(*gpios) + (gpios->count * sizeof(*gpio));
  54 }
  55 #endif /* ENV_RAMSTAGE */
  56
  57 int get_lid_switch(void)
  58 {
  59         /* Read lid switch state from the EC. */
  60         return !!(google_chromeec_get_switches() & EC_SWITCH_LID_OPEN);
  61 }
  62
  63 int get_developer_mode_switch(void)
  64 {
  65         /* No physical developer mode switch. */
  66         return 0;
  67 }
  68
  69 int get_recovery_mode_switch(void)
  70 {
  71         /* Check for dedicated recovery switch first. */
  72         if (google_chromeec_get_switches() & EC_SWITCH_DEDICATED_RECOVERY)
  73                 return 1;
  74
  75         /* Otherwise check if the EC has posted the keyboard recovery event. */
  76         return !!(google_chromeec_get_events_b() &
  77                   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
  78 }
  79
  80 int clear_recovery_mode_switch(void)
  81 {
  82         /* Clear keyboard recovery event. */
  83         return google_chromeec_clear_events_b(
  84                 EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
  85 }
  86
  87 int get_write_protect_state(void)
  88 {
  89         /* Read PCH_WP GPIO. */
  90         return gpio_get(GPIO_PCH_WP);
  91 }