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