text: /* Copyright 2021 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 "battery_smart.h"
  #include "charge_manager.h"
  #include "charger.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)
  {
  	if (port != 0)
  		return;
  
  	/* 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 != 0)
  		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;
  }
  
  int pd_snk_is_vbus_provided(int port)
  {
  	return pd_check_vbus_level(port, VBUS_PRESENT);
  }
  