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/* Copyright 2016 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 "extpower.h"
#include "charge_manager.h"
#include "common.h"
#include "console.h"
#include "driver/charger/bd9995x.h"
#include "driver/tcpm/anx74xx.h"
#include "driver/tcpm/ps8xxx.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"
#include "usb_pd_tcpm.h"
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
static uint8_t vbus_en[CONFIG_USB_PD_PORT_MAX_COUNT];
static uint8_t vbus_rp[CONFIG_USB_PD_PORT_MAX_COUNT] = {TYPEC_RP_1A5,
TYPEC_RP_1A5};
int board_vbus_source_enabled(int port)
{
return vbus_en[port];
}
static void board_vbus_update_source_current(int port)
{
enum gpio_signal gpio = port ? GPIO_USB_C1_5V_EN : GPIO_USB_C0_5V_EN;
int flags = (vbus_rp[port] == TYPEC_RP_1A5 && vbus_en[port]) ?
(GPIO_INPUT | GPIO_PULL_UP) : (GPIO_OUTPUT | GPIO_PULL_UP);
/*
* Driving USB_Cx_5V_EN high, actually put a 16.5k resistance
* (2x 33k in parallel) on the NX5P3290 load switch ILIM pin,
* setting a minimum OCP current of 3186 mA.
* Putting an internal pull-up on USB_Cx_5V_EN, effectively put a 33k
* resistor on ILIM, setting a minimum OCP current of 1505 mA.
*/
gpio_set_level(gpio, vbus_en[port]);
gpio_set_flags(gpio, flags);
}
__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp)
{
vbus_rp[port] = rp;
/* change the GPIO driving the load switch if needed */
board_vbus_update_source_current(port);
}
int pd_set_power_supply_ready(int port)
{
/* Ensure we're not charging from this port */
bd9995x_select_input_port(port, 0);
/* Ensure we advertise the proper available current quota */
charge_manager_source_port(port, 1);
pd_set_vbus_discharge(port, 0);
/* Provide VBUS */
vbus_en[port] = 1;
board_vbus_update_source_current(port);
/* 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)
{
int prev_en;
prev_en = vbus_en[port];
/* Disable VBUS */
vbus_en[port] = 0;
board_vbus_update_source_current(port);
/* Enable discharge if we were previously sourcing 5V */
if (prev_en)
pd_set_vbus_discharge(port, 1);
/* Give back the current quota we are no longer using */
charge_manager_source_port(port, 0);
/* notify host of power info change */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
}
int pd_check_vconn_swap(int port)
{
/* in G3, do not allow vconn swap since pp5000_A rail is off */
return gpio_get_level(GPIO_EN_PP5000);
}
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