src/mainboard/google/daisy/chromeos.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2013 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc.
  18  */
  19
  20 #include <boot/coreboot_tables.h>
  21 #include <console/console.h>
  22 #include <ec/google/chromeec/ec.h>
  23 #include <ec/google/chromeec/ec_commands.h>
  24 #include <soc/cpu.h>
  25 #include <soc/gpio.h>
  26 #include <string.h>
  27 #include <vendorcode/google/chromeos/chromeos.h>
  28 #include <bootmode.h>
  29
  30 void fill_lb_gpios(struct lb_gpios *gpios)
  31 {
  32         int count = 0;
  33
  34         /* Write Protect: active low */
  35         gpios->gpios[count].port = EXYNOS5_GPD1;
  36         gpios->gpios[count].polarity = ACTIVE_LOW;
  37         gpios->gpios[count].value = gpio_get_value(GPIO_D16); // WP_GPIO
  38         strncpy((char *)gpios->gpios[count].name, "write protect",
  39                 GPIO_MAX_NAME_LENGTH);
  40         count++;
  41
  42         /* Recovery: active low */
  43         gpios->gpios[count].port = -1;
  44         gpios->gpios[count].polarity = ACTIVE_HIGH;
  45         gpios->gpios[count].value = get_recovery_mode_switch();
  46         strncpy((char *)gpios->gpios[count].name, "recovery",
  47                 GPIO_MAX_NAME_LENGTH);
  48         count++;
  49
  50         /* Lid: active high */
  51         gpios->gpios[count].port = EXYNOS5_GPX3;
  52         gpios->gpios[count].polarity = ACTIVE_HIGH;
  53         gpios->gpios[count].value = gpio_get_value(GPIO_X35); // LID_GPIO
  54         strncpy((char *)gpios->gpios[count].name, "lid", GPIO_MAX_NAME_LENGTH);
  55         count++;
  56
  57         /* Power: virtual GPIO active low */
  58         gpios->gpios[count].port = EXYNOS5_GPX1;
  59         gpios->gpios[count].polarity = ACTIVE_LOW;
  60         gpios->gpios[count].value =
  61                 gpio_get_value(GPIO_X13); // POWER_GPIO
  62         strncpy((char *)gpios->gpios[count].name, "power",
  63                 GPIO_MAX_NAME_LENGTH);
  64         count++;
  65
  66         /* Developer: virtual GPIO active high */
  67         gpios->gpios[count].port = -1;
  68         gpios->gpios[count].polarity = ACTIVE_HIGH;
  69         gpios->gpios[count].value = get_developer_mode_switch();
  70         strncpy((char *)gpios->gpios[count].name, "developer",
  71                 GPIO_MAX_NAME_LENGTH);
  72         count++;
  73
  74         gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio));
  75         gpios->count = count;
  76
  77         printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size);
  78 }
  79
  80 int get_developer_mode_switch(void)
  81 {
  82         return 0;
  83 }
  84
  85 int get_recovery_mode_switch(void)
  86 {
  87         uint32_t ec_events;
  88
  89         /* The GPIO is active low. */
  90         if (!gpio_get_value(GPIO_Y10)) // RECMODE_GPIO
  91                 return 1;
  92
  93         ec_events = google_chromeec_get_events_b();
  94         return !!(ec_events &
  95                   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
  96 }
  97
  98 int get_write_protect_state(void)
  99 {
 100         return !gpio_get_value(GPIO_D16);
 101 }