text: /* Copyright 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.
   */
  
  #include "atomic.h"
  #include "charge_manager.h"
  #include "common.h"
  #include "console.h"
  #include "gpio.h"
  #include "hooks.h"
  #include "host_command.h"
  #include "registers.h"
  #include "system.h"
  #include "task.h"
  #include "timer.h"
  #include "util.h"
  #include "usb_mux.h"
  #include "usb_pd.h"
  
  #define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
  #define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
  
  /* Define typical operating power and max power */
  #define OPERATING_POWER_MW 15000
  #define MAX_POWER_MW       60000
  #define MAX_CURRENT_MA     3000
  
  /*
   * Do not request any voltage within this deadband region, where
   * we're not sure whether or not the boost or the bypass will be on.
   */
  #define INPUT_VOLTAGE_DEADBAND_MIN 9700
  #define INPUT_VOLTAGE_DEADBAND_MAX 11999
  
  #define PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |\
  			 PDO_FIXED_COMM_CAP)
  
  const uint32_t pd_src_pdo[] = {
  		PDO_FIXED(5000,   900, PDO_FIXED_FLAGS),
  };
  const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo);
  
  const uint32_t pd_snk_pdo[] = {
  		PDO_FIXED(5000, 500, PDO_FIXED_FLAGS),
  		PDO_BATT(4750, 21000, 15000),
  		PDO_VAR(4750, 21000, 3000),
  };
  const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
  
  __override int pd_is_valid_input_voltage(int mv)
  {
  	/* Allow any voltage not in the boost bypass deadband */
  	return  (mv < INPUT_VOLTAGE_DEADBAND_MIN) ||
  		(mv > INPUT_VOLTAGE_DEADBAND_MAX);
  }
  
  int pd_set_power_supply_ready(int port)
  {
  	/* provide VBUS */
  	gpio_set_level(port ? GPIO_USB_C1_5V_EN : GPIO_USB_C0_5V_EN, 1);
  
  	/* notify host of power info change */
  	pd_send_host_event(PD_EVENT_POWER_CHANGE);
  
  	return EC_SUCCESS; /* we are ready */
  }
  
  void pd_power_supply_reset(int port)
  {
  	/* Kill VBUS */
  	gpio_set_level(port ? GPIO_USB_C1_5V_EN : GPIO_USB_C0_5V_EN, 0);
  
  	/* notify host of power info change */
  	pd_send_host_event(PD_EVENT_POWER_CHANGE);
  }
  
  int pd_snk_is_vbus_provided(int port)
  {
  	return gpio_get_level(port ? GPIO_USB_C1_VBUS_WAKE :
  				     GPIO_USB_C0_VBUS_WAKE);
  }
  
  int pd_check_vconn_swap(int port)
  {
  	/* in S5, do not allow vconn swap since pp5000 rail is off */
  	return gpio_get_level(GPIO_PCH_SLP_S5_L);
  }
  
  /* ----------------- Vendor Defined Messages ------------------ */
  #define PORT_TO_HPD(port) ((port) ? GPIO_USB_C1_DP_HPD : GPIO_USB_C0_DP_HPD)
  __override void svdm_dp_post_config(int port)
  {
  	dp_flags[port] |= DP_FLAGS_DP_ON;
  	if (!(dp_flags[port] & DP_FLAGS_HPD_HI_PENDING))
  		return;
  
  	gpio_set_level(PORT_TO_HPD(port), 1);
  }
  
  static void hpd0_irq_deferred(void)
  {
  	gpio_set_level(GPIO_USB_C0_DP_HPD, 1);
  }
  
  static void hpd1_irq_deferred(void)
  {
  	gpio_set_level(GPIO_USB_C1_DP_HPD, 1);
  }
  
  DECLARE_DEFERRED(hpd0_irq_deferred);
  DECLARE_DEFERRED(hpd1_irq_deferred);
  #define PORT_TO_HPD_IRQ_DEFERRED(port) ((port) ?			\
  					&hpd1_irq_deferred_data :	\
  					&hpd0_irq_deferred_data)
  
  __override int svdm_dp_attention(int port, uint32_t *payload)
  {
  	int cur_lvl;
  	int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
  	int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
  	enum gpio_signal hpd = PORT_TO_HPD(port);
  	cur_lvl = gpio_get_level(hpd);
  
  	dp_status[port] = payload[1];
  
  	/* Its initial DP status message prior to config */
  	if (!(dp_flags[port] & DP_FLAGS_DP_ON)) {
  		if (lvl)
  			dp_flags[port] |= DP_FLAGS_HPD_HI_PENDING;
  		return 1;
  	}
  
  	if (irq & cur_lvl) {
  		gpio_set_level(hpd, 0);
  		hook_call_deferred(PORT_TO_HPD_IRQ_DEFERRED(port),
  				   HPD_DSTREAM_DEBOUNCE_IRQ);
  	} else if (irq & !cur_lvl) {
  		CPRINTF("ERR:HPD:IRQ&LOW\n");
  		return 0; /* nak */
  	} else {
  		gpio_set_level(hpd, lvl);
  	}
  	/* ack */
  	return 1;
  }
  
  __override void svdm_exit_dp_mode(int port)
  {
  	gpio_set_level(PORT_TO_HPD(port), 0);
  }
  