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/* Copyright (c) 2014 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.
*/
/* Host command module for PD MCU */
#include "charge_state.h"
#include "common.h"
#include "console.h"
#include "host_command.h"
#include "task.h"
#include "timer.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_PD_HOST_CMD, format, ## args)
#define TASK_EVENT_EXCHANGE_PD_STATUS TASK_EVENT_CUSTOM(1)
void host_command_pd_send_status(void)
{
task_set_event(TASK_ID_PDCMD, TASK_EVENT_EXCHANGE_PD_STATUS, 0);
}
void pd_exchange_status(int *charge_port)
{
struct ec_params_pd_status ec_status;
struct ec_response_pd_status pd_status = {
/* default for when the PD isn't cooperating */
.active_charge_port = -1,
};
int rv = 0;
/* Send battery state of charge */
if (charge_get_flags() & CHARGE_FLAG_BATT_RESPONSIVE)
ec_status.batt_soc = charge_get_percent();
else
ec_status.batt_soc = -1;
rv = pd_host_command(EC_CMD_PD_EXCHANGE_STATUS, 0, &ec_status,
sizeof(struct ec_params_pd_status), &pd_status,
sizeof(struct ec_response_pd_status));
if (charge_port)
*charge_port = pd_status.active_charge_port;
if (rv < 0) {
CPRINTS("Host command to PD MCU failed");
return;
}
/* Set input current limit */
rv = charge_set_input_current_limit(MAX(pd_status.curr_lim_ma,
CONFIG_CHARGER_INPUT_CURRENT));
if (rv < 0)
CPRINTS("Failed to set input current limit from PD MCU");
/* If PD is signalling host event, then pass it up to AP */
if (pd_status.status & PD_STATUS_HOST_EVENT)
host_set_single_event(EC_HOST_EVENT_PD_MCU);
}
void pd_command_task(void)
{
/* On startup exchange status with the PD */
pd_exchange_status(0);
while (1) {
/* Wait for the next command event */
int evt = task_wait_event(-1);
/* Process event to send status to PD */
if (evt & TASK_EVENT_EXCHANGE_PD_STATUS)
pd_exchange_status(0);
}
}
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