text: /* Copyright 2015 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 "common.h"
  #include "anx7447.h"
  #include "console.h"
  #include "gpio.h"
  #include "hooks.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 PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP)
  
  /* Used to fake VBUS presence since no GPIO is available to read VBUS */
  static int vbus_present;
  
  const uint32_t pd_src_pdo[] = {
  		PDO_FIXED(5000, 3000, PDO_FIXED_FLAGS),
  };
  const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo);
  
  const uint32_t pd_snk_pdo[] = {
  		PDO_FIXED(5000, 900, PDO_FIXED_FLAGS),
  		PDO_BATT(5000, 21000, 30000),
  };
  const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
  
  #if defined(CONFIG_USB_PD_TCPM_MUX) && defined(CONFIG_USB_PD_TCPM_ANX7447)
  const struct usb_mux usb_muxes[CONFIG_USB_PD_PORT_MAX_COUNT] = {
  	{
  		.usb_port = 0,
  		.driver    = &anx7447_usb_mux_driver,
  	},
  };
  #endif
  
  #ifdef CONFIG_USB_PD_TCPM_ANX7447
  int pd_set_power_supply_ready(int port)
  {
  	/* Disable charging */
  	anx7447_board_charging_enable(port, 0);
  
  	/* Provide VBUS */
  	gpio_set_level(GPIO_VBUS_PMIC_CTRL, 1);
  	anx7447_set_power_supply_ready(port);
  
  	/* notify host of power info change */
  
  	CPRINTS("Enable VBUS, port%d", port);
  
  	return EC_SUCCESS;
  }
  
  void pd_power_supply_reset(int port)
  {
  	/* Disable VBUS */
  	anx7447_power_supply_reset(port);
  	gpio_set_level(GPIO_VBUS_PMIC_CTRL, 0);
  	CPRINTS("Disable VBUS, port%d", port);
  
  	/* Enable charging */
  	anx7447_board_charging_enable(port, 1);
  }
  #else
  int pd_set_power_supply_ready(int port)
  {
  	/* Turn on the "up" LED when we output VBUS */
  	gpio_set_level(GPIO_LED_U, 1);
  	CPRINTS("Power supply ready/%d", port);
  	return EC_SUCCESS; /* we are ready */
  }
  
  void pd_power_supply_reset(int port)
  {
  	/* Turn off the "up" LED when we shutdown VBUS */
  	gpio_set_level(GPIO_LED_U, 0);
  	/* Disable VBUS */
  	CPRINTS("Disable VBUS", port);
  }
  #endif /* CONFIG_USB_PD_TCPM_ANX7447 */
  
  void pd_set_input_current_limit(int port, uint32_t max_ma,
  				uint32_t supply_voltage)
  {
  	CPRINTS("USBPD current limit port %d max %d mA %d mV",
  		port, max_ma, supply_voltage);
  	/* do some LED coding of the power we can sink */
  	if (max_ma) {
  		if (supply_voltage > 6500)
  			gpio_set_level(GPIO_LED_R, 1);
  		else
  			gpio_set_level(GPIO_LED_L, 1);
  	} else {
  		gpio_set_level(GPIO_LED_L, 0);
  		gpio_set_level(GPIO_LED_R, 0);
  	}
  }
  
  __override void typec_set_input_current_limit(int port, uint32_t max_ma,
  					      uint32_t supply_voltage)
  {
  	CPRINTS("TYPEC current limit port %d max %d mA %d mV",
  		port, max_ma, supply_voltage);
  	gpio_set_level(GPIO_LED_R, !!max_ma);
  }
  
  void button_event(enum gpio_signal signal)
  {
  	vbus_present = !vbus_present;
  	CPRINTS("VBUS %d", vbus_present);
  }
  
  static int command_vbus_toggle(int argc, char **argv)
  {
  	vbus_present = !vbus_present;
  	CPRINTS("VBUS %d", vbus_present);
  
  	return EC_SUCCESS;
  }
  DECLARE_CONSOLE_COMMAND(vbus, command_vbus_toggle,
  			"",
  			"Toggle VBUS detected");
  
  int pd_snk_is_vbus_provided(int port)
  {
  	return vbus_present;
  }
  
  __override int pd_check_data_swap(int port,
  				  enum pd_data_role data_role)
  {
  	/* Always allow data swap */
  	return 1;
  }
  
  #ifdef CONFIG_USBC_VCONN_SWAP
  int pd_check_vconn_swap(int port)
  {
  	/*
  	 * Allow vconn swap as long as we are acting as a dual role device,
  	 * otherwise assume our role is fixed (not in S0 or console command
  	 * to fix our role).
  	 */
  	return pd_get_dual_role(port) == PD_DRP_TOGGLE_ON;
  }
  #endif
  
  __override void pd_check_pr_role(int port,
  				 enum pd_power_role pr_role,
  				 int flags)
  {
  }
  
  __override void pd_check_dr_role(int port,
  				 enum pd_data_role dr_role,
  				 int flags)
  {
  }
  /* ----------------- Vendor Defined Messages ------------------ */
  const uint32_t vdo_idh = VDO_IDH(1, /* data caps as USB host */
  				 0, /* data caps as USB device */
  				 IDH_PTYPE_PERIPH,
  				 0, /* supports alt modes */
  				 0x0000);
  
  const uint32_t vdo_product = VDO_PRODUCT(0x0000, 0x0000);
  
  static int svdm_response_identity(int port, uint32_t *payload)
  {
  	payload[VDO_I(IDH)] = vdo_idh;
  	payload[VDO_I(CSTAT)] = VDO_CSTAT(0);
  	payload[VDO_I(PRODUCT)] = vdo_product;
  	return VDO_I(PRODUCT) + 1;
  }
  
  __override const struct svdm_response svdm_rsp = {
  	.identity = &svdm_response_identity,
  	.svids = NULL,
  	.modes = NULL,
  };
  
  #ifdef CONFIG_USB_PD_ALT_MODE_DFP
  __override void svdm_safe_dp_mode(int port)
  {
  	/* make DP interface safe until configure */
  	dp_flags[port] = 0;
  	/* board_set_usb_mux(port, USB_PD_MUX_NONE, pd_get_polarity(port)); */
  }
  
  __override int svdm_dp_config(int port, uint32_t *payload)
  {
  	int opos = pd_alt_mode(port, TCPC_TX_SOP, USB_SID_DISPLAYPORT);
  	int pin_mode = pd_dfp_dp_get_pin_mode(port, dp_status[port]);
  #if defined(CONFIG_USB_PD_TCPM_MUX) && defined(CONFIG_USB_PD_TCPM_ANX7447)
  	const struct usb_mux *mux = &usb_muxes[port];
  #endif
  
  #ifdef CONFIG_USB_PD_TCPM_ANX7447
  	mux_state_t mux_state = USB_PD_MUX_NONE;
  	if (pd_get_polarity(port))
  		mux_state |= USB_PD_MUX_POLARITY_INVERTED;
  #endif
  
  	CPRINTS("pin_mode = %d", pin_mode);
  	if (!pin_mode)
  		return 0;
  
  #if defined(CONFIG_USB_PD_TCPM_MUX) && defined(CONFIG_USB_PD_TCPM_ANX7447)
  	switch (pin_mode) {
  	case MODE_DP_PIN_A:
  	case MODE_DP_PIN_C:
  	case MODE_DP_PIN_E:
  		mux_state |= USB_PD_MUX_DP_ENABLED;
  		mux->driver->set(mux, mux_state);
  		break;
  	case MODE_DP_PIN_B:
  	case MODE_DP_PIN_D:
  	case MODE_DP_PIN_F:
  		mux_state |= USB_PD_MUX_DOCK;
  		mux->driver->set(mux, mux_state);
  		break;
  	}
  #endif
  
  	/*
  	 * board_set_usb_mux(port, USB_PD_MUX_DP_ENABLED,
  	 * pd_get_polarity(port));
  	 */
  	payload[0] = VDO(USB_SID_DISPLAYPORT, 1,
  			 CMD_DP_CONFIG | VDO_OPOS(opos));
  	payload[1] = VDO_DP_CFG(pin_mode, /* pin mode */
  				1,             /* DPv1.3 signaling */
  				2);            /* UFP connected */
  	return 2;
  }
  
  __override void svdm_dp_post_config(int port)
  {
  	const struct usb_mux *mux = &usb_muxes[port];
  
  	dp_flags[port] |= DP_FLAGS_DP_ON;
  	if (!(dp_flags[port] & DP_FLAGS_HPD_HI_PENDING))
  		return;
  
  	if (IS_ENABLED(CONFIG_USB_PD_TCPM_ANX7447))
  		anx7447_tcpc_update_hpd_status(mux, 1, 0);
  }
  
  __override int svdm_dp_attention(int port, uint32_t *payload)
  {
  #ifdef CONFIG_USB_PD_TCPM_ANX7447
  	int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
  	int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
  	const struct usb_mux *mux = &usb_muxes[port];
  
  	CPRINTS("Attention: 0x%x", payload[1]);
  	anx7447_tcpc_update_hpd_status(mux, lvl, irq);
  #endif
  	dp_status[port] = payload[1];
  
  	/* ack */
  	return 1;
  }
  
  __override void svdm_exit_dp_mode(int port)
  {
  	svdm_safe_dp_mode(port);
  #ifdef CONFIG_USB_PD_TCPM_ANX7447
  	anx7447_tcpc_clear_hpd_status(port);
  #endif
  }
  #endif /* CONFIG_USB_PD_ALT_MODE_DFP */
  