text: /* Copyright 2020 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.
   */
  
  /* Type-C port manager for Fairchild's FUSB307 */
  
  #include "console.h"
  #include "fusb307.h"
  #include "hooks.h"
  #include "task.h"
  #include "tcpm/tcpci.h"
  #include "tcpm/tcpm.h"
  #include "timer.h"
  #include "util.h"
  
  #define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
  #define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
  
  int fusb307_power_supply_reset(int port)
  {
  	return tcpc_write(port, TCPC_REG_COMMAND, 0x66);
  }
  
  static int fusb307_tcpm_init(int port)
  {
  	int rv;
  
  	rv = tcpci_tcpm_init(port);
  
  	rv = tcpci_set_role_ctrl(port, TYPEC_DRP, TYPEC_RP_USB, TYPEC_CC_RD);
  	pd_set_dual_role(port, PD_DRP_TOGGLE_ON);
  
  	return rv;
  }
  
  int fusb307_tcpm_set_polarity(int port, enum tcpc_cc_polarity polarity)
  {
  	int rv;
  	enum tcpc_cc_voltage_status cc1, cc2;
  
  	rv = tcpci_tcpm_set_polarity(port, polarity);
  
  	tcpm_get_cc(port, &cc1, &cc2);
  	if (cc1) {
  		if (pd_get_power_role(port) == PD_ROLE_SINK) {
  			int role = TCPC_REG_ROLE_CTRL_SET(0,
  			tcpci_get_cached_rp(port), TYPEC_CC_RD, TYPEC_CC_OPEN);
  
  			tcpc_write(port, TCPC_REG_ROLE_CTRL, role);
  		} else {
  			int role = TCPC_REG_ROLE_CTRL_SET(0,
  			tcpci_get_cached_rp(port), TYPEC_CC_RP, TYPEC_CC_OPEN);
  
  			tcpc_write(port, TCPC_REG_ROLE_CTRL, role);
  		}
  	} else if (cc2) {
  		if (pd_get_power_role(port) == PD_ROLE_SINK) {
  			int role = TCPC_REG_ROLE_CTRL_SET(0,
  			tcpci_get_cached_rp(port), TYPEC_CC_OPEN, TYPEC_CC_RD);
  
  			tcpc_write(port, TCPC_REG_ROLE_CTRL, role);
  		} else {
  			int role = TCPC_REG_ROLE_CTRL_SET(0,
  			tcpci_get_cached_rp(port), TYPEC_CC_OPEN, TYPEC_CC_RP);
  
  			tcpc_write(port, TCPC_REG_ROLE_CTRL, role);
  		}
  	} else {
  		if (pd_get_power_role(port) == PD_ROLE_SINK)
  			tcpci_tcpm_set_cc(port, TYPEC_CC_RD);
  		else
  			tcpci_tcpm_set_cc(port, TYPEC_CC_RP);
  	}
  
  	return rv;
  }
  
  const struct tcpm_drv fusb307_tcpm_drv = {
  	.init			= &fusb307_tcpm_init,
  	.release		= &tcpci_tcpm_release,
  	.get_cc			= &tcpci_tcpm_get_cc,
  #ifdef CONFIG_USB_PD_VBUS_DETECT_TCPC
  	.check_vbus_level	= &tcpci_tcpm_check_vbus_level,
  #endif
  	.select_rp_value	= &tcpci_tcpm_select_rp_value,
  	.set_cc			= &tcpci_tcpm_set_cc,
  	.set_polarity		= &fusb307_tcpm_set_polarity,
  	.set_vconn		= &tcpci_tcpm_set_vconn,
  	.set_msg_header		= &tcpci_tcpm_set_msg_header,
  	.set_rx_enable		= &tcpci_tcpm_set_rx_enable,
  	.get_message_raw	= &tcpci_tcpm_get_message_raw,
  	.transmit		= &tcpci_tcpm_transmit,
  	.tcpc_alert		= &tcpci_tcpc_alert,
  	.tcpc_enable_auto_discharge_disconnect =
  				  &tcpci_tcpc_enable_auto_discharge_disconnect,
  	.get_chip_info		= &tcpci_get_chip_info,
  #if defined(CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE)
  	.drp_toggle		= &tcpci_tcpc_drp_toggle,
  #endif
  	.set_bist_test_mode	= &tcpci_set_bist_test_mode,
  };
  