src/mainboard/google/nyan/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
  16 #include <boot/coreboot_tables.h>
  17 #include <bootmode.h>
  18 #include <console/console.h>
  19 #include <ec/google/chromeec/ec.h>
  20 #include <ec/google/chromeec/ec_commands.h>
  21 #include <gpio.h>
  22 #include <string.h>
  23 #include <vendorcode/google/chromeos/chromeos.h>
  24
  25 void fill_lb_gpios(struct lb_gpios *gpios)
  26 {
  27         int count = 0;
  28
  29         /* Write Protect: active low */
  30         gpios->gpios[count].port = GPIO(R1);
  31         gpios->gpios[count].polarity = ACTIVE_LOW;
  32         gpios->gpios[count].value = gpio_get(GPIO(R1));
  33         strncpy((char *)gpios->gpios[count].name, "write protect",
  34                 GPIO_MAX_NAME_LENGTH);
  35         count++;
  36
  37         /* Recovery: active high */
  38         gpios->gpios[count].port = -1;
  39         gpios->gpios[count].polarity = ACTIVE_HIGH;
  40         gpios->gpios[count].value = get_recovery_mode_switch();
  41         strncpy((char *)gpios->gpios[count].name, "recovery",
  42                 GPIO_MAX_NAME_LENGTH);
  43         count++;
  44
  45         /* Lid: active high */
  46         gpios->gpios[count].port = GPIO(R4);
  47         gpios->gpios[count].polarity = ACTIVE_HIGH;
  48         gpios->gpios[count].value = -1;
  49         strncpy((char *)gpios->gpios[count].name, "lid", GPIO_MAX_NAME_LENGTH);
  50         count++;
  51
  52         /* Power: active low */
  53         gpios->gpios[count].port = GPIO(Q0);
  54         gpios->gpios[count].polarity = ACTIVE_LOW;
  55         gpios->gpios[count].value = -1;
  56         strncpy((char *)gpios->gpios[count].name, "power",
  57                 GPIO_MAX_NAME_LENGTH);
  58         count++;
  59
  60         /* Developer: virtual GPIO active high */
  61         gpios->gpios[count].port = -1;
  62         gpios->gpios[count].polarity = ACTIVE_HIGH;
  63         gpios->gpios[count].value = get_developer_mode_switch();
  64         strncpy((char *)gpios->gpios[count].name, "developer",
  65                 GPIO_MAX_NAME_LENGTH);
  66         count++;
  67
  68         /* EC in RW: active high */
  69         gpios->gpios[count].port = GPIO(U4);
  70         gpios->gpios[count].polarity = ACTIVE_HIGH;
  71         gpios->gpios[count].value = -1;
  72         strncpy((char *)gpios->gpios[count].name, "EC in RW",
  73                 GPIO_MAX_NAME_LENGTH);
  74         count++;
  75
  76         /* Reset: active low (output) */
  77         gpios->gpios[count].port = GPIO(I5);
  78         gpios->gpios[count].polarity = ACTIVE_LOW;
  79         gpios->gpios[count].value = -1;
  80         strncpy((char *)gpios->gpios[count].name, "reset",
  81                 GPIO_MAX_NAME_LENGTH);
  82         count++;
  83
  84         gpios->size = sizeof(*gpios) + (count * sizeof(struct lb_gpio));
  85         gpios->count = count;
  86
  87         printk(BIOS_ERR, "Added %d GPIOS size %d\n", count, gpios->size);
  88 }
  89
  90 int get_developer_mode_switch(void)
  91 {
  92         return 0;
  93 }
  94
  95 int get_recovery_mode_switch(void)
  96 {
  97         uint32_t ec_events;
  98
  99         ec_events = google_chromeec_get_events_b();
 100         return !!(ec_events &
 101                   EC_HOST_EVENT_MASK(EC_HOST_EVENT_KEYBOARD_RECOVERY));
 102 }
 103
 104 int get_write_protect_state(void)
 105 {
 106         return !gpio_get(GPIO(R1));
 107 }