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/* Copyright 2018 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 "charge_manager.h"
#include "console.h"
#include "gpio.h"
#include "pi3usb9281.h"
#include "system.h"
#include "usb_mux.h"
#include "usbc_ppc.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
int pd_check_vconn_swap(int port)
{
/* TODO(waihong): Check any case we do not allow. */
return 1;
}
__override void pd_execute_data_swap(int port,
enum pd_data_role data_role)
{
int enable = (data_role == PD_ROLE_UFP);
int type;
/*
* Exclude the PD charger, in which the "USB Communications Capable"
* bit is unset in the Fixed Supply PDO.
*/
if (pd_capable(port))
enable = enable && pd_get_partner_usb_comm_capable(port);
/*
* The hub behind the BC1.2 chip may advertise a BC1.2 type. So
* disconnect the switch when getting the charger type to ensure
* the detected type is from external.
*/
usb_charger_set_switches(port, USB_SWITCH_DISCONNECT);
type = pi3usb9281_get_device_type(port);
usb_charger_set_switches(port, USB_SWITCH_RESTORE);
/* Exclude the BC1.2 charger, which is not detected as CDP or SDP. */
enable = enable && (type & (PI3USB9281_TYPE_CDP | PI3USB9281_TYPE_SDP));
/* Only mux one port to AP. If already muxed, return. */
if (enable && (!gpio_get_level(GPIO_USB_C0_HS_MUX_SEL) ||
gpio_get_level(GPIO_USB_C1_HS_MUX_SEL)))
return;
/* Port-0 and port-1 have different polarities. */
if (port == 0)
gpio_set_level(GPIO_USB_C0_HS_MUX_SEL, enable ? 0 : 1);
else if (port == 1)
gpio_set_level(GPIO_USB_C1_HS_MUX_SEL, enable ? 1 : 0);
}
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};
static void board_vbus_update_source_current(int port)
{
if (port == 0) {
/*
* Port 0 is controlled by a USB-C PPC SN5S330.
*/
ppc_set_vbus_source_current_limit(port, vbus_rp[port]);
ppc_vbus_source_enable(port, vbus_en[port]);
} else if (port == 1) {
/*
* Port 1 is controlled by a USB-C current-limited power
* switch, NX5P3290. Change the GPIO driving the load switch.
*
* 1.5 vs 3.0 A limit is controlled by a dedicated gpio.
* If the GPIO is asserted, it shorts a n-MOSFET to put a
* 16.5k resistance (2x 33k in parallel) on the NX5P3290 load
* switch ILIM pin, setting a minimum OCP current of 3100 mA.
* If the GPIO is deasserted, the n-MOSFET is open that makes
* a single 33k resistor on ILIM, setting a minimum OCP
* current of 1505 mA.
*/
gpio_set_level(GPIO_EN_USB_C1_3A,
vbus_rp[port] == TYPEC_RP_3A0 ? 1 : 0);
gpio_set_level(GPIO_EN_USB_C1_5V_OUT, vbus_en[port]);
}
}
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);
#ifdef CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT
/* Give back the current quota we are no longer using */
charge_manager_source_port(port, 0);
#endif /* defined(CONFIG_USB_PD_MAX_SINGLE_SOURCE_CURRENT) */
/* notify host of power info change */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
}
int pd_set_power_supply_ready(int port)
{
/* Disable charging */
board_vbus_sink_enable(port, 0);
pd_set_vbus_discharge(port, 0);
/* Provide VBUS */
vbus_en[port] = 1;
board_vbus_update_source_current(port);
/* Ensure we advertise the proper available current quota */
charge_manager_source_port(port, 1);
/* notify host of power info change */
pd_send_host_event(PD_EVENT_POWER_CHANGE);
return EC_SUCCESS; /* we are ready */
}
int board_vbus_source_enabled(int port)
{
return vbus_en[port];
}
__override void typec_set_source_current_limit(int port, enum tcpc_rp_value rp)
{
vbus_rp[port] = rp;
board_vbus_update_source_current(port);
}
int pd_snk_is_vbus_provided(int port)
{
return !gpio_get_level(port ? GPIO_USB_C1_VBUS_DET_L :
GPIO_USB_C0_VBUS_DET_L);
}
/* ----------------- Vendor Defined Messages ------------------ */
/**
* Is the port fine to be muxed its DisplayPort lines?
*
* Only one port can be muxed to DisplayPort at a time.
*
* @param port Port number of TCPC.
* @return 1 is fine; 0 is bad as other port is already muxed;
*/
static int is_dp_muxable(int port)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
if (i != port) {
if (usb_mux_get(i) & USB_PD_MUX_DP_ENABLED)
return 0;
}
return 1;
}
extern uint32_t dp_status[CONFIG_USB_PD_PORT_MAX_COUNT];
__override int svdm_dp_attention(int port, uint32_t *payload)
{
int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
int mf_pref = PD_VDO_DPSTS_MF_PREF(payload[1]);
const struct usb_mux *mux = &usb_muxes[port];
dp_status[port] = payload[1];
mux->hpd_update(port, lvl, irq);
if (lvl && is_dp_muxable(port)) {
/*
* The GPIO USBC_MUX_CONF1 enables the mux of the DP redriver
* for the port 1.
*/
gpio_set_level(GPIO_USBC_MUX_CONF1, port == 1);
usb_mux_set(port, mf_pref ? TYPEC_MUX_DOCK : TYPEC_MUX_DP,
USB_SWITCH_CONNECT, pd_get_polarity(port));
} else {
usb_mux_set(port, mf_pref ? TYPEC_MUX_USB : TYPEC_MUX_NONE,
USB_SWITCH_CONNECT, pd_get_polarity(port));
}
/* ack */
return 1;
}
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