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/* Copyright 2016 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "console.h"
#include "device_state.h"
#include "hooks.h"
#define CPRINTS(format, args...) cprints(CC_SYSTEM, format, ## args)
/**
* Return text description for a state
*
* @param state State
* @return String describing that state
*/
static const char *state_desc(enum device_state state)
{
return state == DEVICE_STATE_ON ? "on" :
state == DEVICE_STATE_OFF ? "off" : "unknown";
}
enum device_state device_get_state(enum device_type device)
{
return device_states[device].state;
}
int device_set_state(enum device_type device, enum device_state state)
{
struct device_config *dc = device_states + device;
/*
* It'd be handy for debugging if we could print to the console when
* device_set_state() is called. But unfortunately, it'll be called a
* LOT when debouncing UART activity on DETECT_EC or DETECT_AP. So
* only print when the last known state changes below.
*/
dc->state = state;
if (state != DEVICE_STATE_UNKNOWN && dc->last_known_state != state) {
dc->last_known_state = state;
CPRINTS("DEV %s -> %s", dc->name, state_desc(state));
return 1;
}
return 0;
}
/**
* Periodic check of device states.
*
* The board does all the work.
*
* Note that device states can change outside of this context as well, for
* example, from a GPIO interrupt handler.
*/
static void check_device_state(void)
{
int i;
for (i = 0; i < DEVICE_COUNT; i++)
board_update_device_state(i);
}
DECLARE_HOOK(HOOK_SECOND, check_device_state, HOOK_PRIO_DEFAULT);
static int command_devices(int argc, char **argv)
{
const struct device_config *dc = device_states;
int i;
ccprintf("Device State LastKnown\n");
for (i = 0; i < DEVICE_COUNT; i++, dc++)
ccprintf("%-9s %-7s %s\n", dc->name, state_desc(dc->state),
state_desc(dc->last_known_state));
return EC_SUCCESS;
}
DECLARE_SAFE_CONSOLE_COMMAND(devices, command_devices,
"",
"Get the device states");
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