board/sasukette/usb_pd_policy.c

/* Copyright 2021 The ChromiumOS Authors
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "charge_manager.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "driver/charger/isl923x_public.h"
#include "driver/tcpm/tcpci.h"
#include "usb_pd.h"

#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ##args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ##args)

int pd_check_vconn_swap(int port)
{
	/* Allow VCONN swaps if the AP is on. */
	return chipset_in_state(CHIPSET_STATE_ANY_SUSPEND | CHIPSET_STATE_ON);
}

void pd_power_supply_reset(int port)
{
	/* Disable VBUS */
	tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_LOW);

	/* Notify host of power info change. */
	pd_send_host_event(PD_EVENT_POWER_CHANGE);
}

int pd_set_power_supply_ready(int port)
{
	int rv;

	if (port >= board_get_usb_pd_port_count())
		return EC_ERROR_INVAL;

	/* Disable charging. */
	rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SNK_CTRL_LOW);
	if (rv)
		return rv;

	/* Our policy is not to source VBUS when the AP is off. */
	if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
		return EC_ERROR_NOT_POWERED;

	/* Provide Vbus. */
	rv = tcpc_write(port, TCPC_REG_COMMAND, TCPC_REG_COMMAND_SRC_CTRL_HIGH);
	if (rv)
		return rv;

	rv = raa489000_enable_asgate(port, true);
	if (rv)
		return rv;

	/* Notify host of power info change. */
	pd_send_host_event(PD_EVENT_POWER_CHANGE);

	return EC_SUCCESS;
}