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|
/* Copyright 2019 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 "charge_state.h"
#include "common.h"
#include "console.h"
#include "hooks.h"
#include "system.h"
#include "task.h"
#include "tcpm.h"
#include "usb_common.h"
#include "usb_mux.h"
#include "usb_pd.h"
#include "usb_pd_dpm.h"
#include "usb_pe_sm.h"
#include "usb_prl_sm.h"
#include "usb_sm.h"
#include "usb_tc_sm.h"
#include "usbc_ppc.h"
#include "vboot.h"
/*
* USB Type-C DRP with Accessory and Try.SRC module
* See Figure 4-16 in Release 1.4 of USB Type-C Spec.
*/
#ifdef CONFIG_COMMON_RUNTIME
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
#else /* CONFIG_COMMON_RUNTIME */
#define CPRINTF(format, args...)
#define CPRINTS(format, args...)
#endif
#define CPRINTF_LX(x, format, args...) \
do { \
if (tc_debug_level >= x) \
CPRINTF(format, ## args); \
} while (0)
#define CPRINTF_L1(format, args...) CPRINTF_LX(1, format, ## args)
#define CPRINTF_L2(format, args...) CPRINTF_LX(2, format, ## args)
#define CPRINTF_L3(format, args...) CPRINTF_LX(3, format, ## args)
#define CPRINTS_LX(x, format, args...) \
do { \
if (tc_debug_level >= x) \
CPRINTS(format, ## args); \
} while (0)
#define CPRINTS_L1(format, args...) CPRINTS_LX(1, format, ## args)
#define CPRINTS_L2(format, args...) CPRINTS_LX(2, format, ## args)
#define CPRINTS_L3(format, args...) CPRINTS_LX(3, format, ## args)
/*
* Define DEBUG_PRINT_FLAG_AND_EVENT_NAMES to print flag names when set and
* cleared, and event names when handled by tc_event_check().
*/
#undef DEBUG_PRINT_FLAG_AND_EVENT_NAMES
#ifdef DEBUG_PRINT_FLAG_AND_EVENT_NAMES
void print_flag(int set_or_clear, int flag);
#define TC_SET_FLAG(port, flag) \
do { \
print_flag(1, flag); \
deprecated_atomic_or(&tc[port].flags, (flag)); \
} while (0)
#define TC_CLR_FLAG(port, flag) \
do { \
print_flag(0, flag); \
deprecated_atomic_clear_bits(&tc[port].flags, (flag)); \
} while (0)
#else
#define TC_SET_FLAG(port, flag) deprecated_atomic_or(&tc[port].flags, (flag))
#define TC_CLR_FLAG(port, flag) \
deprecated_atomic_clear_bits(&tc[port].flags, (flag))
#endif
#define TC_CHK_FLAG(port, flag) (tc[port].flags & (flag))
/* Type-C Layer Flags */
/* Flag to note we are sourcing VCONN */
#define TC_FLAGS_VCONN_ON BIT(0)
/* Flag to note port partner has Rp/Rp or Rd/Rd */
#define TC_FLAGS_TS_DTS_PARTNER BIT(1)
/* Flag to note VBus input has never been low */
#define TC_FLAGS_VBUS_NEVER_LOW BIT(2)
/* Flag to note Low Power Mode transition is currently happening */
#define TC_FLAGS_LPM_TRANSITION BIT(3)
/* Flag to note Low Power Mode is currently on */
#define TC_FLAGS_LPM_ENGAGED BIT(4)
/* Flag to note CVTPD has been detected */
#define TC_FLAGS_CTVPD_DETECTED BIT(5)
/* Flag to note request to swap to VCONN on */
#define TC_FLAGS_REQUEST_VC_SWAP_ON BIT(6)
/* Flag to note request to swap to VCONN off */
#define TC_FLAGS_REQUEST_VC_SWAP_OFF BIT(7)
/* Flag to note request to swap VCONN is being rejected */
#define TC_FLAGS_REJECT_VCONN_SWAP BIT(8)
/* Flag to note request to power role swap */
#define TC_FLAGS_REQUEST_PR_SWAP BIT(9)
/* Flag to note request to data role swap */
#define TC_FLAGS_REQUEST_DR_SWAP BIT(10)
/* Flag to note request to power off sink */
#define TC_FLAGS_POWER_OFF_SNK BIT(11)
/* Flag to note port partner has unconstrained power */
#define TC_FLAGS_PARTNER_UNCONSTRAINED BIT(12)
/* Flag to note port partner is Dual Role Data */
#define TC_FLAGS_PARTNER_DR_DATA BIT(13)
/* Flag to note port partner is Dual Role Power */
#define TC_FLAGS_PARTNER_DR_POWER BIT(14)
/* Flag to note port partner is Power Delivery capable */
#define TC_FLAGS_PARTNER_PD_CAPABLE BIT(15)
/* Flag to note hard reset has been requested */
#define TC_FLAGS_HARD_RESET_REQUESTED BIT(16)
/* Flag to note port partner is USB comms capable */
#define TC_FLAGS_PARTNER_USB_COMM BIT(17)
/* Flag to note we are currently performing PR Swap */
#define TC_FLAGS_PR_SWAP_IN_PROGRESS BIT(18)
/* Flag to note we are performing Discover Identity */
#define TC_FLAGS_DISC_IDENT_IN_PROGRESS BIT(19)
/* Flag to note we should check for connection */
#define TC_FLAGS_CHECK_CONNECTION BIT(20)
/* Flag to note pd_set_suspend SUSPEND state */
#define TC_FLAGS_SUSPEND BIT(21)
/*
* Clear all flags except TC_FLAGS_LPM_ENGAGED and TC_FLAGS_SUSPEND.
*/
#define CLR_ALL_BUT_LPM_FLAGS(port) TC_CLR_FLAG(port, \
~(TC_FLAGS_LPM_ENGAGED | TC_FLAGS_SUSPEND))
/* 100 ms is enough time for any TCPC transaction to complete. */
#define PD_LPM_DEBOUNCE_US (100 * MSEC)
/*
* This delay is not part of the USB Type-C specification or the USB port
* controller specification. Some TCPCs require extra time before the CC_STATUS
* register is updated when exiting low power mode.
*
* This delay can be possibly shortened or removed by checking VBUS state
* before trying to re-enter LPM.
*
* TODO(b/162347811): TCPMv2: Wait for debounce on Vbus and CC lines
*/
#define PD_LPM_EXIT_DEBOUNCE_US CONFIG_USB_PD_TCPC_LPM_EXIT_DEBOUNCE
/*
* The TypeC state machine uses this bit to disable/enable PD
* This bit corresponds to bit-0 of pd_disabled_mask
*/
#define PD_DISABLED_NO_CONNECTION BIT(0)
/*
* Console and Host commands use this bit to override the
* PD_DISABLED_NO_CONNECTION bit that was set by the TypeC
* state machine.
* This bit corresponds to bit-1 of pd_disabled_mask
*/
#define PD_DISABLED_BY_POLICY BIT(1)
/* Unreachable time in future */
#define TIMER_DISABLED 0xffffffffffffffff
enum ps_reset_sequence {
PS_STATE0,
PS_STATE1,
PS_STATE2,
};
/* List of all TypeC-level states */
enum usb_tc_state {
/* Super States */
TC_CC_OPEN,
TC_CC_RD,
TC_CC_RP,
/* Normal States */
TC_DISABLED,
TC_ERROR_RECOVERY,
TC_UNATTACHED_SNK,
TC_ATTACH_WAIT_SNK,
TC_ATTACHED_SNK,
TC_UNATTACHED_SRC,
TC_ATTACH_WAIT_SRC,
TC_ATTACHED_SRC,
TC_TRY_SRC,
TC_TRY_WAIT_SNK,
TC_DRP_AUTO_TOGGLE,
TC_LOW_POWER_MODE,
TC_CT_UNATTACHED_SNK,
TC_CT_ATTACHED_SNK,
TC_STATE_COUNT,
};
/* Forward declare the full list of states. This is indexed by usb_tc_state */
static const struct usb_state tc_states[];
/*
* Remove all of the states that aren't support at link time. This allows
* IS_ENABLED to work.
*/
#ifndef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
GEN_NOT_SUPPORTED(TC_DRP_AUTO_TOGGLE);
#define TC_DRP_AUTO_TOGGLE TC_DRP_AUTO_TOGGLE_NOT_SUPPORTED
#endif /* CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE */
#ifndef CONFIG_USB_PD_TCPC_LOW_POWER
GEN_NOT_SUPPORTED(TC_LOW_POWER_MODE);
#define TC_LOW_POWER_MODE TC_LOW_POWER_MODE_NOT_SUPPORTED
#endif /* CONFIG_USB_PD_TCPC_LOW_POWER */
#ifndef CONFIG_USB_PE_SM
GEN_NOT_SUPPORTED(TC_CT_UNATTACHED_SNK);
#define TC_CT_UNATTACHED_SNK TC_CT_UNATTACHED_SNK_NOT_SUPPORTED
GEN_NOT_SUPPORTED(TC_CT_ATTACHED_SNK);
#define TC_CT_ATTACHED_SNK TC_CT_ATTACHED_SNK_NOT_SUPPORTED
#endif /* CONFIG_USB_PE_SM */
/*
* We will use DEBUG LABELS if we will be able to print (COMMON RUNTIME)
* and either CONFIG_USB_PD_DEBUG_LEVEL is not defined (no override) or
* we are overriding and the level is not DISABLED.
*
* If we can't print or the CONFIG_USB_PD_DEBUG_LEVEL is defined to be 0
* then the DEBUG LABELS will be removed from the build.
*/
#if defined(CONFIG_COMMON_RUNTIME) && \
(!defined(CONFIG_USB_PD_DEBUG_LEVEL) || \
(CONFIG_USB_PD_DEBUG_LEVEL > 0))
#define USB_PD_DEBUG_LABELS
#endif
/*
* Helper Macro to determine if the machine is in state
* TC_ATTACHED_SRC
*/
#define IS_ATTACHED_SRC(port) (get_state_tc(port) == TC_ATTACHED_SRC)
/*
* Helper Macro to determine if the machine is in state
* TC_ATTACHED_SNK
*/
#define IS_ATTACHED_SNK(port) (get_state_tc(port) == TC_ATTACHED_SNK)
#ifdef USB_PD_DEBUG_LABELS
/* List of human readable state names for console debugging */
static const char * const tc_state_names[] = {
[TC_DISABLED] = "Disabled",
[TC_ERROR_RECOVERY] = "ErrorRecovery",
[TC_UNATTACHED_SNK] = "Unattached.SNK",
[TC_ATTACH_WAIT_SNK] = "AttachWait.SNK",
[TC_ATTACHED_SNK] = "Attached.SNK",
[TC_UNATTACHED_SRC] = "Unattached.SRC",
[TC_ATTACH_WAIT_SRC] = "AttachWait.SRC",
[TC_ATTACHED_SRC] = "Attached.SRC",
[TC_TRY_SRC] = "Try.SRC",
[TC_TRY_WAIT_SNK] = "TryWait.SNK",
#ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
[TC_DRP_AUTO_TOGGLE] = "DRPAutoToggle",
#endif
#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
[TC_LOW_POWER_MODE] = "LowPowerMode",
#endif
#ifdef CONFIG_USB_PE_SM
[TC_CT_UNATTACHED_SNK] = "CTUnattached.SNK",
[TC_CT_ATTACHED_SNK] = "CTAttached.SNK",
#endif
/* Super States */
[TC_CC_OPEN] = "SS:CC_OPEN",
[TC_CC_RD] = "SS:CC_RD",
[TC_CC_RP] = "SS:CC_RP",
[TC_STATE_COUNT] = "",
};
#else
/*
* Reference so IS_ENABLED section below that references the names
* will compile and the optimizer will remove it.
*/
extern const char **tc_state_names;
#endif
/* Debug log level - higher number == more log */
#ifdef CONFIG_USB_PD_DEBUG_LEVEL
static const enum debug_level tc_debug_level = CONFIG_USB_PD_DEBUG_LEVEL;
#else
static enum debug_level tc_debug_level = DEBUG_LEVEL_1;
#endif
#ifdef DEBUG_PRINT_FLAG_AND_EVENT_NAMES
struct bit_name {
int value;
const char *name;
};
static struct bit_name flag_bit_names[] = {
{ TC_FLAGS_VCONN_ON, "VCONN_ON" },
{ TC_FLAGS_TS_DTS_PARTNER, "TS_DTS_PARTNER" },
{ TC_FLAGS_VBUS_NEVER_LOW, "VBUS_NEVER_LOW" },
{ TC_FLAGS_LPM_TRANSITION, "LPM_TRANSITION" },
{ TC_FLAGS_LPM_ENGAGED, "LPM_ENGAGED" },
{ TC_FLAGS_CTVPD_DETECTED, "CTVPD_DETECTED" },
{ TC_FLAGS_REQUEST_VC_SWAP_ON, "REQUEST_VC_SWAP_ON" },
{ TC_FLAGS_REQUEST_VC_SWAP_OFF, "REQUEST_VC_SWAP_OFF" },
{ TC_FLAGS_REJECT_VCONN_SWAP, "REJECT_VCONN_SWAP" },
{ TC_FLAGS_REQUEST_PR_SWAP, "REQUEST_PR_SWAP" },
{ TC_FLAGS_REQUEST_DR_SWAP, "REQUEST_DR_SWAP" },
{ TC_FLAGS_POWER_OFF_SNK, "POWER_OFF_SNK" },
{ TC_FLAGS_PARTNER_UNCONSTRAINED, "PARTNER_UNCONSTRAINED" },
{ TC_FLAGS_PARTNER_DR_DATA, "PARTNER_DR_DATA" },
{ TC_FLAGS_PARTNER_DR_POWER, "PARTNER_DR_POWER" },
{ TC_FLAGS_PARTNER_PD_CAPABLE, "PARTNER_PD_CAPABLE" },
{ TC_FLAGS_HARD_RESET_REQUESTED, "HARD_RESET_REQUESTED" },
{ TC_FLAGS_PARTNER_USB_COMM, "PARTNER_USB_COMM" },
{ TC_FLAGS_PR_SWAP_IN_PROGRESS, "PR_SWAP_IN_PROGRESS" },
{ TC_FLAGS_DISC_IDENT_IN_PROGRESS, "DISC_IDENT_IN_PROGRESS" },
{ TC_FLAGS_CHECK_CONNECTION, "CHECK_CONNECTION" },
{ TC_FLAGS_SUSPEND, "SUSPEND" },
};
static struct bit_name event_bit_names[] = {
{ TASK_EVENT_SYSJUMP_READY, "SYSJUMP_READY" },
{ TASK_EVENT_IPC_READY, "IPC_READY" },
{ TASK_EVENT_PD_AWAKE, "PD_AWAKE" },
{ TASK_EVENT_PECI_DONE, "PECI_DONE" },
{ TASK_EVENT_I2C_IDLE, "I2C_IDLE" },
{ TASK_EVENT_PS2_DONE, "PS2_DONE" },
{ TASK_EVENT_DMA_TC, "DMA_TC" },
{ TASK_EVENT_ADC_DONE, "ADC_DONE" },
{ TASK_EVENT_RESET_DONE, "RESET_DONE" },
{ TASK_EVENT_WAKE, "WAKE" },
{ TASK_EVENT_MUTEX, "MUTEX" },
{ TASK_EVENT_TIMER, "TIMER" },
{ PD_EVENT_TX, "TX" },
{ PD_EVENT_CC, "CC" },
{ PD_EVENT_TCPC_RESET, "TCPC_RESET" },
{ PD_EVENT_UPDATE_DUAL_ROLE, "UPDATE_DUAL_ROLE" },
{ PD_EVENT_DEVICE_ACCESSED, "DEVICE_ACCESSED" },
{ PD_EVENT_POWER_STATE_CHANGE, "POWER_STATE_CHANGE" },
{ PD_EVENT_SEND_HARD_RESET, "SEND_HARD_RESET" },
{ PD_EVENT_SYSJUMP, "SYSJUMP" },
};
static void print_bits(const char *desc, int value,
struct bit_name *names, int names_size)
{
int i;
CPRINTF("%s 0x%x : ", desc, value);
for (i = 0; i < names_size; i++) {
if (value & names[i].value)
CPRINTF("%s | ", names[i].name);
value &= ~names[i].value;
}
if (value != 0)
CPRINTF("0x%x", value);
CPRINTF("\n");
}
void print_flag(int set_or_clear, int flag)
{
print_bits(set_or_clear ? "Set" : "Clr", flag, flag_bit_names,
ARRAY_SIZE(flag_bit_names));
}
#endif /* DEBUG_PRINT_FLAG_AND_EVENT_NAMES */
/* Generate a compiler error if invalid states are referenced */
#ifndef CONFIG_USB_PD_TRY_SRC
#define TC_TRY_SRC TC_TRY_SRC_UNDEFINED
#define TC_TRY_WAIT_SNK TC_TRY_WAIT_SNK_UNDEFINED
#endif
static struct type_c {
/* state machine context */
struct sm_ctx ctx;
/* current port power role (SOURCE or SINK) */
enum pd_power_role power_role;
/* current port data role (DFP or UFP) */
enum pd_data_role data_role;
/*
* Higher-level power deliver state machines are enabled if false,
* else they're disabled if bits PD_DISABLED_NO_CONNECTION or
* PD_DISABLED_BY_POLICY are set.
*/
uint32_t pd_disabled_mask;
/*
* Timer for handling TOGGLE_OFF/FORCE_SINK mode when auto-toggle
* enabled. See drp_auto_toggle_next_state() for details.
*/
uint64_t drp_sink_time;
#ifdef CONFIG_USB_PE_SM
/* Power supply reset sequence during a hard reset */
enum ps_reset_sequence ps_reset_state;
#endif
/* Port polarity */
enum tcpc_cc_polarity polarity;
/* port flags, see TC_FLAGS_* */
uint32_t flags;
/* Time a port shall wait before it can determine it is attached */
uint64_t cc_debounce;
/*
* Time a Sink port shall wait before it can determine it is detached
* due to the potential for USB PD signaling on CC as described in
* the state definitions.
*/
uint64_t pd_debounce;
/*
* Time to ignore Vbus absence due to external IC debounce detection
* logic immediately after a power role swap.
*/
uint64_t vbus_debounce_time;
#ifdef CONFIG_USB_PD_TRY_SRC
/*
* Time a port shall wait before it can determine it is
* re-attached during the try-wait process.
*/
uint64_t try_wait_debounce;
#endif
/* The cc state */
enum pd_cc_states cc_state;
/* Role toggle timer */
uint64_t next_role_swap;
/* Generic timer */
uint64_t timeout;
/* Time to enter low power mode */
uint64_t low_power_time;
/* Time to debounce exit low power mode */
uint64_t low_power_exit_time;
/* Tasks to notify after TCPC has been reset */
int tasks_waiting_on_reset;
/* Tasks preventing TCPC from entering low power mode */
int tasks_preventing_lpm;
/* Voltage on CC pin */
enum tcpc_cc_voltage_status cc_voltage;
/* Type-C current */
typec_current_t typec_curr;
/* Type-C current change */
typec_current_t typec_curr_change;
/* Selected TCPC CC/Rp values */
enum tcpc_cc_pull select_cc_pull;
enum tcpc_rp_value select_current_limit_rp;
enum tcpc_rp_value select_collision_rp;
} tc[CONFIG_USB_PD_PORT_MAX_COUNT];
/* Port dual-role state */
static volatile __maybe_unused
enum pd_dual_role_states drp_state[CONFIG_USB_PD_PORT_MAX_COUNT] = {
[0 ... (CONFIG_USB_PD_PORT_MAX_COUNT - 1)] =
CONFIG_USB_PD_INITIAL_DRP_STATE};
static void set_vconn(int port, int enable);
/* Forward declare common, private functions */
static __maybe_unused int reset_device_and_notify(int port);
static __maybe_unused void check_drp_connection(const int port);
static void sink_power_sub_states(int port);
#ifdef CONFIG_POWER_COMMON
static void handle_new_power_state(int port);
#endif /* CONFIG_POWER_COMMON */
static void pd_update_dual_role_config(int port);
/* Forward declare common, private functions */
static void set_state_tc(const int port, const enum usb_tc_state new_state);
test_export_static enum usb_tc_state get_state_tc(const int port);
#ifdef CONFIG_USB_PD_TRY_SRC
/* Enable variable for Try.SRC states */
static uint32_t pd_try_src;
static volatile enum try_src_override_t pd_try_src_override;
static void pd_update_try_source(void);
#endif
static void sink_stop_drawing_current(int port);
#ifdef CONFIG_USB_PD_TRY_SRC
static bool is_try_src_enabled(int port)
{
return IS_ENABLED(CONFIG_USB_PD_TRY_SRC) &&
((pd_try_src_override == TRY_SRC_OVERRIDE_ON) ||
(pd_try_src_override == TRY_SRC_NO_OVERRIDE && pd_try_src));
}
#endif
/*
* Public Functions
*
* NOTE: Functions prefixed with pd_ are defined in usb_pd.h
* Functions prefixed with tc_ are defined int usb_tc_sm.h
*/
#ifndef CONFIG_USB_PRL_SM
/*
* These pd_ functions are implemented in common/usb_prl_sm.c
*/
void pd_transmit_complete(int port, int status)
{
/* DO NOTHING */
}
void pd_execute_hard_reset(int port)
{
/* DO NOTHING */
}
__overridable void pd_set_vbus_discharge(int port, int enable)
{
/* DO NOTHING */
}
#endif /* !CONFIG_USB_PRL_SM */
void pd_update_contract(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
if (IS_ATTACHED_SRC(port))
pd_dpm_request(port, DPM_REQUEST_SRC_CAP_CHANGE);
}
}
void pd_request_source_voltage(int port, int mv)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
pd_set_max_voltage(mv);
if (IS_ATTACHED_SNK(port))
pd_dpm_request(port, DPM_REQUEST_NEW_POWER_LEVEL);
else
pd_dpm_request(port, DPM_REQUEST_PR_SWAP);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
void pd_set_external_voltage_limit(int port, int mv)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
pd_set_max_voltage(mv);
/* Must be in Attached.SNK when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SNK)
pd_dpm_request(port, DPM_REQUEST_NEW_POWER_LEVEL);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
void pd_set_new_power_request(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
/* Must be in Attached.SNK when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SNK)
pd_dpm_request(port, DPM_REQUEST_NEW_POWER_LEVEL);
}
}
void tc_request_power_swap(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
/*
* Must be in Attached.SRC or Attached.SNK
*/
if (IS_ATTACHED_SRC(port) || IS_ATTACHED_SNK(port)) {
TC_SET_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS);
/* Let tc_pr_swap_complete start the Vbus debounce */
tc[port].vbus_debounce_time = TIMER_DISABLED;
}
/*
* TCPCI Rev2 V1.1 4.4.5.4.4
* Disconnect Detection by the Sink TCPC during a Connection
*
* Upon reception of or prior to transmitting a PR_Swap
* message, the TCPM acting as a Sink shall disable the Sink
* disconnect detection to retain PD message delivery when
* Power Role Swap happens. Disable AutoDischargeDisconnect.
*/
if (IS_ATTACHED_SNK(port))
tcpm_enable_auto_discharge_disconnect(port, 0);
}
}
/* Flag to indicate PD comm is disabled on init */
static int pd_disabled_on_init;
static void pd_update_pd_comm(void)
{
int i;
/*
* Some batteries take much longer time to report its SOC.
* The init function disabled PD comm on startup. Need this
* hook to enable PD comm when the battery level is enough.
*/
if (pd_disabled_on_init &&
usb_get_battery_soc() >= CONFIG_USB_PD_TRY_SRC_MIN_BATT_SOC) {
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++)
pd_comm_enable(i, 1);
pd_disabled_on_init = 0;
}
}
DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE, pd_update_pd_comm, HOOK_PRIO_DEFAULT);
static bool pd_comm_allowed_by_policy(void)
{
if (system_is_in_rw())
return true;
if (vboot_allow_usb_pd())
return true;
/*
* If enable PD in RO on a non-EFS2 device, a hard reset will be issued
* when sysjump to RW that makes the device brownout on the dead-battery
* case. Disable PD for this special case as a workaround.
*/
if (IS_ENABLED(CONFIG_SYSTEM_UNLOCKED)) {
if (IS_ENABLED(CONFIG_VBOOT_EFS2))
return true;
if (usb_get_battery_soc() >= CONFIG_USB_PD_TRY_SRC_MIN_BATT_SOC)
return true;
pd_disabled_on_init = 1;
}
return false;
}
static void tc_policy_pd_enable(int port, int en)
{
if (en)
deprecated_atomic_clear_bits(&tc[port].pd_disabled_mask,
PD_DISABLED_BY_POLICY);
else
deprecated_atomic_or(&tc[port].pd_disabled_mask,
PD_DISABLED_BY_POLICY);
CPRINTS("C%d: PD comm policy %sabled", port, en ? "en" : "dis");
}
static void tc_enable_pd(int port, int en)
{
if (en)
deprecated_atomic_clear_bits(&tc[port].pd_disabled_mask,
PD_DISABLED_NO_CONNECTION);
else
deprecated_atomic_or(&tc[port].pd_disabled_mask,
PD_DISABLED_NO_CONNECTION);
}
#ifdef CONFIG_USB_PD_TRY_SRC
static void tc_enable_try_src(int en)
{
if (en)
deprecated_atomic_or(&pd_try_src, 1);
else
deprecated_atomic_clear_bits(&pd_try_src, 1);
}
#endif
static void tc_detached(int port)
{
TC_CLR_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
hook_notify(HOOK_USB_PD_DISCONNECT);
tc_pd_connection(port, 0);
tcpm_debug_accessory(port, 0);
}
static inline void pd_set_dual_role_and_event(int port,
enum pd_dual_role_states state, uint32_t event)
{
drp_state[port] = state;
#ifdef CONFIG_USB_PD_TRY_SRC
if (IS_ENABLED(CONFIG_USB_PD_TRY_SRC))
pd_update_try_source();
#endif
if (event != 0)
task_set_event(PD_PORT_TO_TASK_ID(port), event, 0);
}
void pd_set_dual_role(int port, enum pd_dual_role_states state)
{
pd_set_dual_role_and_event(port, state, PD_EVENT_UPDATE_DUAL_ROLE);
}
bool pd_get_partner_data_swap_capable(int port)
{
/* return data swap capable status of port partner */
return !!TC_CHK_FLAG(port, TC_FLAGS_PARTNER_DR_DATA);
}
int pd_comm_is_enabled(int port)
{
return tc_get_pd_enabled(port);
}
void pd_request_data_swap(int port)
{
/*
* Must be in Attached.SRC, Attached.SNK, DebugAccessory.SNK,
* or UnorientedDebugAccessory.SRC when this function
* is called
*/
if (IS_ATTACHED_SRC(port) || IS_ATTACHED_SNK(port)) {
TC_SET_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
/*
* Return true if partner port is a DTS or TS capable of entering debug
* mode (eg. is presenting Rp/Rp or Rd/Rd).
*/
int pd_ts_dts_plugged(int port)
{
return TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
}
/* Return true if partner port is known to be PD capable. */
bool pd_capable(int port)
{
return !!TC_CHK_FLAG(port, TC_FLAGS_PARTNER_PD_CAPABLE);
}
/*
* Return true if partner port is capable of communication over USB data
* lines.
*/
bool pd_get_partner_usb_comm_capable(int port)
{
return !!TC_CHK_FLAG(port, TC_FLAGS_PARTNER_USB_COMM);
}
enum pd_dual_role_states pd_get_dual_role(int port)
{
return drp_state[port];
}
#ifdef CONFIG_CMD_PD_DEV_DUMP_INFO
static inline void pd_dev_dump_info(uint16_t dev_id, uint32_t *hash)
{
int j;
ccprintf("DevId:%d.%d Hash:", HW_DEV_ID_MAJ(dev_id),
HW_DEV_ID_MIN(dev_id));
for (j = 0; j < PD_RW_HASH_SIZE / 4; j++)
ccprintf(" %08x ", hash[i]);
ccprintf("\n");
}
#endif /* CONFIG_CMD_PD_DEV_DUMP_INFO */
const char *tc_get_current_state(int port)
{
if (IS_ENABLED(USB_PD_DEBUG_LABELS))
return tc_state_names[get_state_tc(port)];
else
return "";
}
uint32_t tc_get_flags(int port)
{
return tc[port].flags;
}
int tc_is_attached_src(int port)
{
return IS_ATTACHED_SRC(port);
}
int tc_is_attached_snk(int port)
{
return IS_ATTACHED_SNK(port);
}
void tc_partner_dr_power(int port, int en)
{
if (en)
TC_SET_FLAG(port, TC_FLAGS_PARTNER_DR_POWER);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_DR_POWER);
}
void tc_partner_unconstrainedpower(int port, int en)
{
if (en)
TC_SET_FLAG(port, TC_FLAGS_PARTNER_UNCONSTRAINED);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_UNCONSTRAINED);
}
void tc_partner_usb_comm(int port, int en)
{
if (en)
TC_SET_FLAG(port, TC_FLAGS_PARTNER_USB_COMM);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_USB_COMM);
}
void tc_partner_dr_data(int port, int en)
{
if (en)
TC_SET_FLAG(port, TC_FLAGS_PARTNER_DR_DATA);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_DR_DATA);
}
void tc_pd_connection(int port, int en)
{
if (en) {
TC_SET_FLAG(port, TC_FLAGS_PARTNER_PD_CAPABLE);
/* If a PD device is attached then disable deep sleep */
if (IS_ENABLED(CONFIG_LOW_POWER_IDLE) &&
!IS_ENABLED(CONFIG_USB_PD_TCPC_ON_CHIP)) {
disable_sleep(SLEEP_MASK_USB_PD);
}
} else {
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_PD_CAPABLE);
/* If a PD device isn't attached then enable deep sleep */
if (IS_ENABLED(CONFIG_LOW_POWER_IDLE) &&
!IS_ENABLED(CONFIG_USB_PD_TCPC_ON_CHIP)) {
int i;
/* If all ports are not connected, allow the sleep */
for (i = 0; i < board_get_usb_pd_port_count(); i++) {
if (pd_capable(i))
break;
}
if (i == board_get_usb_pd_port_count())
enable_sleep(SLEEP_MASK_USB_PD);
}
}
}
void tc_ctvpd_detected(int port)
{
TC_SET_FLAG(port, TC_FLAGS_CTVPD_DETECTED);
}
void pd_try_vconn_src(int port)
{
set_vconn(port, 1);
}
int tc_check_vconn_swap(int port)
{
#ifdef CONFIG_USBC_VCONN
if (TC_CHK_FLAG(port, TC_FLAGS_REJECT_VCONN_SWAP))
return 0;
return pd_check_vconn_swap(port);
#else
return 0;
#endif
}
void tc_pr_swap_complete(int port, bool success)
{
if (IS_ATTACHED_SNK(port)) {
/*
* Give the ADCs in the TCPC or PPC time to react following
* a PS_RDY message received during a SRC to SNK swap.
* Note: This is empirically determined, not strictly
* part of the USB PD spec.
* Note: Swap in progress should not be cleared until the
* debounce is completed.
*/
tc[port].vbus_debounce_time = get_time().val + PD_T_DEBOUNCE;
} else {
/* PR Swap is no longer in progress */
TC_CLR_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS);
/*
* AutoDischargeDisconnect was turned off near the SNK->SRC
* PR-Swap message. If the swap was a success, Vbus should be
* valid, so re-enable AutoDischargeDisconnect
*/
if (success)
tcpm_enable_auto_discharge_disconnect(port, 1);
}
}
void tc_prs_src_snk_assert_rd(int port)
{
/*
* Must be in Attached.SRC or UnorientedDebugAccessory.SRC
* when this function is called
*/
if (IS_ATTACHED_SRC(port)) {
/*
* Transition to Attached.SNK to
* DebugAccessory.SNK assert Rd
*/
TC_SET_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
void tc_prs_snk_src_assert_rp(int port)
{
/*
* Must be in Attached.SNK or DebugAccessory.SNK
* when this function is called
*/
if (IS_ATTACHED_SNK(port)) {
/*
* Transition to Attached.SRC or
* UnorientedDebugAccessory.SRC to assert Rp
*/
TC_SET_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
/*
* Hard Reset is being requested. This should not allow a TC connection
* to go to an unattached state until the connection is recovered from
* the hard reset. It is possible for a Hard Reset to cause a timeout
* in trying to recover and an additional Hard Reset would be issued.
* During this entire process it is important that the TC is not allowed
* to go to an unattached state.
*
* Type-C Spec Rev 2.0 section 4.5.2.2.5.2
* Exiting from Attached.SNK State
* A port that is not a V CONN-Powered USB Device and is not in the
* process of a USB PD PR_Swap or a USB PD Hard Reset or a USB PD
* FR_Swap shall transition to Unattached.SNK
*/
void tc_hard_reset_request(int port)
{
TC_SET_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
task_wake(PD_PORT_TO_TASK_ID(port));
}
void tc_disc_ident_in_progress(int port)
{
TC_SET_FLAG(port, TC_FLAGS_DISC_IDENT_IN_PROGRESS);
}
void tc_disc_ident_complete(int port)
{
TC_CLR_FLAG(port, TC_FLAGS_DISC_IDENT_IN_PROGRESS);
}
#ifdef CONFIG_USB_PD_TRY_SRC
void tc_try_src_override(enum try_src_override_t ov)
{
if (IS_ENABLED(CONFIG_USB_PD_TRY_SRC)) {
switch (ov) {
case TRY_SRC_OVERRIDE_OFF: /* 0 */
pd_try_src_override = TRY_SRC_OVERRIDE_OFF;
break;
case TRY_SRC_OVERRIDE_ON: /* 1 */
pd_try_src_override = TRY_SRC_OVERRIDE_ON;
break;
default:
pd_try_src_override = TRY_SRC_NO_OVERRIDE;
}
}
}
enum try_src_override_t tc_get_try_src_override(void)
{
return pd_try_src_override;
}
#endif
void tc_snk_power_off(int port)
{
if (IS_ATTACHED_SNK(port)) {
TC_SET_FLAG(port, TC_FLAGS_POWER_OFF_SNK);
sink_stop_drawing_current(port);
}
}
int tc_src_power_on(int port)
{
if (IS_ATTACHED_SRC(port))
return pd_set_power_supply_ready(port);
return 0;
}
void tc_src_power_off(int port)
{
/* Remove VBUS */
pd_power_supply_reset(port);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_set_ceil(port, CEIL_REQUESTOR_PD,
CHARGE_CEIL_NONE);
}
/*
* Depending on the load on the processor and the tasks running
* it can take a while for the task associated with this port
* to run. So build in 1ms delays, for up to 300ms, to wait for
* the suspend to actually happen.
*/
#define SUSPEND_SLEEP_DELAY 1
#define SUSPEND_SLEEP_RETRIES 300
void pd_set_suspend(int port, int suspend)
{
if (pd_is_port_enabled(port) == !suspend)
return;
/* Track if we are suspended or not */
if (suspend) {
int wait = 0;
TC_SET_FLAG(port, TC_FLAGS_SUSPEND);
/*
* Avoid deadlock when running from task
* which we are going to suspend
*/
if (PD_PORT_TO_TASK_ID(port) == task_get_current())
return;
task_wake(PD_PORT_TO_TASK_ID(port));
/* Sleep this task if we are not suspended */
while (pd_is_port_enabled(port)) {
if (++wait > SUSPEND_SLEEP_RETRIES) {
CPRINTS("C%d: NOT SUSPENDED after %dms",
port, wait * SUSPEND_SLEEP_DELAY);
return;
}
msleep(SUSPEND_SLEEP_DELAY);
}
} else {
TC_CLR_FLAG(port, TC_FLAGS_SUSPEND);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
int pd_is_port_enabled(int port)
{
return get_state_tc(port) != TC_DISABLED;
}
int pd_fetch_acc_log_entry(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM))
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_GET_LOG, NULL, 0);
return EC_RES_SUCCESS;
}
enum tcpc_cc_polarity pd_get_polarity(int port)
{
return tc[port].polarity;
}
enum pd_data_role pd_get_data_role(int port)
{
return tc[port].data_role;
}
enum pd_power_role pd_get_power_role(int port)
{
return tc[port].power_role;
}
enum pd_cc_states pd_get_task_cc_state(int port)
{
return tc[port].cc_state;
}
uint8_t pd_get_task_state(int port)
{
return get_state_tc(port);
}
bool pd_get_vconn_state(int port)
{
return !!TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON);
}
bool pd_get_partner_dual_role_power(int port)
{
return !!TC_CHK_FLAG(port, TC_FLAGS_PARTNER_DR_POWER);
}
bool pd_get_partner_unconstr_power(int port)
{
return !!TC_CHK_FLAG(port, TC_FLAGS_PARTNER_UNCONSTRAINED);
}
const char *pd_get_task_state_name(int port)
{
return tc_get_current_state(port);
}
void pd_vbus_low(int port)
{
TC_CLR_FLAG(port, TC_FLAGS_VBUS_NEVER_LOW);
}
int pd_is_connected(int port)
{
return (IS_ATTACHED_SRC(port) ||
#ifdef CONFIG_USB_PE_SM
(get_state_tc(port) == TC_CT_ATTACHED_SNK) ||
#endif
IS_ATTACHED_SNK(port));
}
bool pd_is_disconnected(int port)
{
return !pd_is_connected(port);
}
static __maybe_unused void bc12_role_change_handler(int port)
{
int event;
int task_id = USB_CHG_PORT_TO_TASK_ID(port);
/* Get the data role of our device */
switch (pd_get_data_role(port)) {
case PD_ROLE_UFP:
event = USB_CHG_EVENT_DR_UFP;
break;
case PD_ROLE_DFP:
event = USB_CHG_EVENT_DR_DFP;
break;
case PD_ROLE_DISCONNECTED:
event = USB_CHG_EVENT_CC_OPEN;
break;
default:
return;
}
task_set_event(task_id, event, 0);
}
/*
* TCPC CC/Rp management
*/
static void typec_select_pull(int port, enum tcpc_cc_pull pull)
{
tc[port].select_cc_pull = pull;
}
void typec_select_src_current_limit_rp(int port, enum tcpc_rp_value rp)
{
tc[port].select_current_limit_rp = rp;
}
void typec_select_src_collision_rp(int port, enum tcpc_rp_value rp)
{
tc[port].select_collision_rp = rp;
}
static enum tcpc_rp_value typec_get_active_select_rp(int port)
{
/* Explicit contract will use the collision Rp */
if (IS_ENABLED(CONFIG_USB_PD_REV30) &&
pe_is_explicit_contract(port))
return tc[port].select_collision_rp;
return tc[port].select_current_limit_rp;
}
int typec_update_cc(int port)
{
int rv;
enum tcpc_cc_pull pull = tc[port].select_cc_pull;
enum tcpc_rp_value rp = typec_get_active_select_rp(port);
rv = tcpm_select_rp_value(port, rp);
if (rv)
return rv;
return tcpm_set_cc(port, pull);
}
#ifdef CONFIG_USB_PE_SM
/*
* This function performs a source hard reset. It should be called
* repeatedly until a true value is returned, signaling that the
* source hard reset is complete. A false value is returned otherwise.
*/
static bool tc_perform_src_hard_reset(int port)
{
switch (tc[port].ps_reset_state) {
case PS_STATE0:
/* Remove VBUS */
tc_src_power_off(port);
/* Turn off VCONN */
set_vconn(port, 0);
/* Set role to DFP */
tc_set_data_role(port, PD_ROLE_DFP);
tc[port].ps_reset_state = PS_STATE1;
tc[port].timeout = get_time().val + PD_T_SRC_RECOVER;
return false;
case PS_STATE1:
/* Enable VBUS */
tc_src_power_on(port);
/* Update the Rp Value */
typec_update_cc(port);
/* Turn off VCONN */
set_vconn(port, 1);
tc[port].ps_reset_state = PS_STATE2;
tc[port].timeout = get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY;
return false;
case PS_STATE2:
/* Tell Policy Engine Hard Reset is complete */
pe_ps_reset_complete(port);
tc[port].ps_reset_state = PS_STATE0;
return true;
}
/*
* This return is added to appease the compiler. It should
* never be reached because the switch handles all possible
* cases of the enum ps_reset_sequence type.
*/
return true;
}
/*
* Wait for recovery after a hard reset. Call repeatedly until true is
* returned, signaling that the hard reset is complete.
*/
static bool tc_perform_snk_hard_reset(int port)
{
switch (tc[port].ps_reset_state) {
case PS_STATE0:
/* Shutting off power, Disable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 0);
/* Hard reset sets us back to default data role */
tc_set_data_role(port, PD_ROLE_UFP);
/* Clear the input current limit */
sink_stop_drawing_current(port);
/*
* When VCONN is supported, the Hard Reset Shall cause
* the Port with the Rd resistor asserted to turn off
* VCONN.
*/
#ifdef CONFIG_USBC_VCONN
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
#endif
/* Wait tSafe0V + tSrcRecover, then check for Vbus presence */
tc[port].ps_reset_state = PS_STATE1;
tc[port].timeout = get_time().val + PD_T_SAFE_0V +
PD_T_SRC_RECOVER_MAX;
return false;
case PS_STATE1:
if (get_time().val < tc[port].timeout)
return false;
/* Watch for Vbus to return */
tc[port].ps_reset_state = PS_STATE2;
tc[port].timeout = get_time().val + PD_T_SRC_TURN_ON;
return false;
case PS_STATE2:
if (pd_is_vbus_present(port)) {
/*
* Inform policy engine that power supply
* reset is complete
*/
tc[port].ps_reset_state = PS_STATE0;
pe_ps_reset_complete(port);
/*
* Now that VBUS is back, let's notify charge manager
* regarding the source's current capabilities.
* sink_power_sub_states() reacts to changes in CC
* terminations, however during a HardReset, the
* terminations of a non-PD port partner will not
* change. Therefore, set the debounce time to right
* now, such that we'll actually reset the correct input
* current limit.
*/
tc[port].cc_debounce = get_time().val;
sink_power_sub_states(port);
/* Power is back, Enable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 1);
return true;
}
/*
* If Vbus isn't back after wait + tSrcTurnOn, go unattached
*/
if (get_time().val > tc[port].timeout) {
tc[port].ps_reset_state = PS_STATE0;
set_state_tc(port, TC_UNATTACHED_SNK);
return true;
}
}
return false;
}
#endif /* CONFIG_USB_PE_SM */
void tc_start_error_recovery(int port)
{
assert(port == TASK_ID_TO_PD_PORT(task_get_current()));
/*
* The port should transition to the ErrorRecovery state
* from any other state when directed.
*/
set_state_tc(port, TC_ERROR_RECOVERY);
}
static void restart_tc_sm(int port, enum usb_tc_state start_state)
{
int res;
/* Clear flags before we transitions states */
tc[port].flags = 0;
res = tcpm_init(port);
CPRINTS("C%d: TCPC init %s", port, res ? "failed" : "ready");
/*
* Update the Rp Value. We don't need to update CC lines though as that
* happens in below set_state transition.
*/
typec_select_src_current_limit_rp(port, CONFIG_USB_PD_PULLUP);
/* Disable if restart failed, otherwise start in default state. */
set_state_tc(port, res ? TC_DISABLED : start_state);
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
/* Initialize USB mux to its default state */
usb_mux_init(port);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/*
* Wait to initialize the PPC after tcpc, which sets
* the correct Rd values; otherwise the TCPC might
* not be pulling the CC lines down when the PPC connects the
* CC lines from the USB connector to the TCPC cause the source
* to drop Vbus causing a brown out.
*/
ppc_init(port);
}
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
/* Initialize PD and type-C supplier current limits to 0 */
pd_set_input_current_limit(port, 0, 0);
typec_set_input_current_limit(port, 0, 0);
charge_manager_update_dualrole(port, CAP_UNKNOWN);
}
#ifdef CONFIG_USB_PE_SM
tc_enable_pd(port, 0);
tc[port].ps_reset_state = PS_STATE0;
#endif
}
void tc_state_init(int port)
{
enum usb_tc_state first_state;
/* For test builds, replicate static initialization */
if (IS_ENABLED(TEST_BUILD)) {
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; ++i) {
memset(&tc[i], 0, sizeof(tc[i]));
drp_state[i] = CONFIG_USB_PD_INITIAL_DRP_STATE;
}
}
/* If port is not available, there is nothing to initialize */
if (port >= board_get_usb_pd_port_count()) {
tc_enable_pd(port, 0);
tc_pause_event_loop(port);
TC_SET_FLAG(port, TC_FLAGS_SUSPEND);
return;
}
#ifdef CONFIG_USB_PD_TRY_SRC
/* Allow system to set try src enable */
tc_try_src_override(TRY_SRC_NO_OVERRIDE);
#endif
/*
* Set initial PD communication policy.
*/
tc_policy_pd_enable(port, pd_comm_allowed_by_policy());
/* Set dual-role state based on chipset power state */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
pd_set_dual_role_and_event(port, PD_DRP_FORCE_SINK, 0);
else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
pd_set_dual_role_and_event(port, pd_get_drp_state_in_suspend(), 0);
else /* CHIPSET_STATE_ON */
pd_set_dual_role_and_event(port, PD_DRP_TOGGLE_ON, 0);
/*
* If we just lost power, don't apply CC open. Otherwise we would boot
* loop, and if this is a fresh power on, then we know there isn't any
* stale PD state as well.
*/
if (system_get_reset_flags() &
(EC_RESET_FLAG_BROWNOUT | EC_RESET_FLAG_POWER_ON)) {
first_state = TC_UNATTACHED_SNK;
/* Turn off any previous sourcing */
tc_src_power_off(port);
set_vconn(port, 0);
} else {
first_state = TC_ERROR_RECOVERY;
}
#ifdef CONFIG_USB_PD_TCPC_BOARD_INIT
/* Board specific TCPC init */
board_tcpc_init();
#endif
/*
* Start with ErrorRecovery state if we can to put us in
* a clean state from any previous boots.
*/
restart_tc_sm(port, first_state);
}
enum pd_cable_plug tc_get_cable_plug(int port)
{
/*
* Messages sent by this state machine are always from a DFP/UFP,
* i.e. the chromebook.
*/
return PD_PLUG_FROM_DFP_UFP;
}
void pd_comm_enable(int port, int en)
{
tc_policy_pd_enable(port, en);
}
uint8_t tc_get_polarity(int port)
{
return tc[port].polarity;
}
uint8_t tc_get_pd_enabled(int port)
{
return !tc[port].pd_disabled_mask;
}
bool pd_alt_mode_capable(int port)
{
return IS_ENABLED(CONFIG_USB_PE_SM) && tc_get_pd_enabled(port);
}
void tc_set_power_role(int port, enum pd_power_role role)
{
tc[port].power_role = role;
}
/*
* Private Functions
*/
/* Set the TypeC state machine to a new state. */
static void set_state_tc(const int port, const enum usb_tc_state new_state)
{
assert(port == TASK_ID_TO_PD_PORT(task_get_current()));
set_state(port, &tc[port].ctx, &tc_states[new_state]);
}
/* Get the current TypeC state. */
test_export_static enum usb_tc_state get_state_tc(const int port)
{
/* Default to returning TC_STATE_COUNT if no state has been set */
if (tc[port].ctx.current == NULL)
return TC_STATE_COUNT;
else
return tc[port].ctx.current - &tc_states[0];
}
/* Get the previous TypeC state. */
static enum usb_tc_state get_last_state_tc(const int port)
{
return tc[port].ctx.previous - &tc_states[0];
}
static void print_current_state(const int port)
{
if (IS_ENABLED(USB_PD_DEBUG_LABELS))
CPRINTS_L1("C%d: %s", port, tc_state_names[get_state_tc(port)]);
else
CPRINTS("C%d: tc-st%d", port, get_state_tc(port));
}
static void handle_device_access(int port)
{
tc[port].low_power_time = get_time().val + PD_LPM_DEBOUNCE_US;
}
void tc_event_check(int port, int evt)
{
#ifdef DEBUG_PRINT_FLAG_AND_EVENT_NAMES
if (evt != TASK_EVENT_TIMER)
print_bits("Event", evt, event_bit_names,
ARRAY_SIZE(event_bit_names));
#endif
if (evt & PD_EXIT_LOW_POWER_EVENT_MASK)
TC_SET_FLAG(port, TC_FLAGS_CHECK_CONNECTION);
if (evt & PD_EVENT_DEVICE_ACCESSED)
handle_device_access(port);
if (evt & PD_EVENT_TCPC_RESET)
reset_device_and_notify(port);
if (evt & PD_EVENT_RX_HARD_RESET)
pd_execute_hard_reset(port);
if (evt & PD_EVENT_SEND_HARD_RESET)
tc_hard_reset_request(port);
#ifdef CONFIG_POWER_COMMON
if (IS_ENABLED(CONFIG_POWER_COMMON)) {
if (evt & PD_EVENT_POWER_STATE_CHANGE)
handle_new_power_state(port);
}
#endif /* CONFIG_POWER_COMMON */
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
{
int i;
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
/*
* Notify all ports of sysjump
*/
if (evt & PD_EVENT_SYSJUMP) {
for (i = 0; i <
CONFIG_USB_PD_PORT_MAX_COUNT; i++)
dpm_set_mode_exit_request(i);
notify_sysjump_ready();
}
}
}
#endif
if (evt & PD_EVENT_UPDATE_DUAL_ROLE)
pd_update_dual_role_config(port);
}
/*
* CC values for regular sources and Debug sources (aka DTS)
*
* Source type Mode of Operation CC1 CC2
* ---------------------------------------------
* Regular Default USB Power RpUSB Open
* Regular USB-C @ 1.5 A Rp1A5 Open
* Regular USB-C @ 3 A Rp3A0 Open
* DTS Default USB Power Rp3A0 Rp1A5
* DTS USB-C @ 1.5 A Rp1A5 RpUSB
* DTS USB-C @ 3 A Rp3A0 RpUSB
*/
void tc_set_data_role(int port, enum pd_data_role role)
{
tc[port].data_role = role;
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
set_usb_mux_with_current_data_role(port);
/*
* Run any board-specific code for role swap (e.g. setting OTG signals
* to SoC).
*/
pd_execute_data_swap(port, role);
/*
* For BC1.2 detection that is triggered on data role change events
* instead of VBUS changes, need to set an event to wake up the USB_CHG
* task and indicate the current data role.
*/
if (IS_ENABLED(CONFIG_BC12_DETECT_DATA_ROLE_TRIGGER))
bc12_role_change_handler(port);
/* Notify TCPC of role update */
tcpm_set_msg_header(port, tc[port].power_role, tc[port].data_role);
}
static void sink_stop_drawing_current(int port)
{
pd_set_input_current_limit(port, 0, 0);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
typec_set_input_current_limit(port, 0, 0);
charge_manager_set_ceil(port,
CEIL_REQUESTOR_PD, CHARGE_CEIL_NONE);
}
}
#ifdef CONFIG_USB_PD_TRY_SRC
static void pd_update_try_source(void)
{
tc_enable_try_src(pd_is_try_source_capable());
}
DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE, pd_update_try_source, HOOK_PRIO_DEFAULT);
#endif /* CONFIG_USB_PD_TRY_SRC */
static void set_vconn(int port, int enable)
{
if (enable)
TC_SET_FLAG(port, TC_FLAGS_VCONN_ON);
else
TC_CLR_FLAG(port, TC_FLAGS_VCONN_ON);
/*
* Disable PPC Vconn first then TCPC in case the voltage feeds back
* to TCPC and damages.
*/
if (IS_ENABLED(CONFIG_USBC_PPC_VCONN) && !enable)
ppc_set_vconn(port, 0);
/*
* We always need to tell the TCPC to enable Vconn first, otherwise some
* TCPCs get confused and think the CC line is in over voltage mode and
* immediately disconnects. If there is a PPC, both devices will
* potentially source Vconn, but that should be okay since Vconn has
* "make before break" electrical requirements when swapping anyway.
*/
tcpm_set_vconn(port, enable);
if (IS_ENABLED(CONFIG_USBC_PPC_VCONN) && enable)
ppc_set_vconn(port, 1);
}
/* This must only be called from the PD task */
static void pd_update_dual_role_config(int port)
{
if (tc[port].power_role == PD_ROLE_SOURCE &&
((drp_state[port] == PD_DRP_FORCE_SINK &&
!pd_ts_dts_plugged(port)) ||
(drp_state[port] == PD_DRP_TOGGLE_OFF &&
get_state_tc(port) == TC_UNATTACHED_SRC))) {
/*
* Change to sink if port is currently a source AND (new DRP
* state is force sink OR new DRP state is either toggle off
* or debug accessory toggle only and we are in the source
* disconnected state).
*/
set_state_tc(port, TC_UNATTACHED_SNK);
} else if (tc[port].power_role == PD_ROLE_SINK &&
drp_state[port] == PD_DRP_FORCE_SOURCE) {
/*
* Change to source if port is currently a sink and the
* new DRP state is force source.
*/
set_state_tc(port, TC_UNATTACHED_SRC);
}
}
#ifdef CONFIG_POWER_COMMON
static void handle_new_power_state(int port)
{
if (IS_ENABLED(CONFIG_POWER_COMMON) &&
IS_ENABLED(CONFIG_USB_PE_SM)) {
if (chipset_in_or_transitioning_to_state(
CHIPSET_STATE_ANY_OFF)) {
/*
* The SoC will negotiate alternate mode again when it
* boots up
*/
dpm_set_mode_exit_request(port);
/*
* The following function will disconnect both USB and
* DP mux, as the chipset is transitioning to OFF.
*/
set_usb_mux_with_current_data_role(port);
}
}
}
#endif /* CONFIG_POWER_COMMON */
#if defined(CONFIG_USB_PD_ALT_MODE) && !defined(CONFIG_USB_PD_ALT_MODE_DFP)
void pd_send_hpd(int port, enum hpd_event hpd)
{
uint32_t data[1];
int opos = pd_alt_mode(port, TCPC_TX_SOP, USB_SID_DISPLAYPORT);
if (!opos)
return;
data[0] = VDO_DP_STATUS((hpd == hpd_irq), /* IRQ_HPD */
(hpd != hpd_low), /* HPD_HI|LOW */
0, /* request exit DP */
0, /* request exit USB */
0, /* MF pref */
1, /* enabled */
0, /* power low */
0x2);
pd_send_vdm(port, USB_SID_DISPLAYPORT, VDO_OPOS(opos) | CMD_ATTENTION,
data, 1);
}
#endif
#ifdef CONFIG_USBC_VCONN_SWAP
void pd_request_vconn_swap_off(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SRC ||
get_state_tc(port) == TC_ATTACHED_SNK) {
TC_SET_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_OFF);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
void pd_request_vconn_swap_on(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SRC ||
get_state_tc(port) == TC_ATTACHED_SNK) {
TC_SET_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_ON);
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
void pd_request_vconn_swap(int port)
{
pd_dpm_request(port, DPM_REQUEST_VCONN_SWAP);
}
#endif
int tc_is_vconn_src(int port)
{
if (IS_ENABLED(CONFIG_USBC_VCONN))
return TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON);
else
return 0;
}
static __maybe_unused int reset_device_and_notify(int port)
{
int rv;
int task, waiting_tasks;
/* This should only be called from the PD task */
assert(port == TASK_ID_TO_PD_PORT(task_get_current()));
TC_SET_FLAG(port, TC_FLAGS_LPM_TRANSITION);
rv = tcpm_init(port);
TC_CLR_FLAG(port, TC_FLAGS_LPM_TRANSITION);
TC_CLR_FLAG(port, TC_FLAGS_LPM_ENGAGED);
tc_start_event_loop(port);
if (rv == EC_SUCCESS)
CPRINTS("C%d: TCPC init ready", port);
else
CPRINTS("C%d: TCPC init failed!", port);
/*
* Before getting the other tasks that are waiting, clear the reset
* event from this PD task to prevent multiple reset/init events
* occurring.
*
* The double reset event happens when the higher priority PD interrupt
* task gets an interrupt during the above tcpm_init function. When that
* occurs, the higher priority task waits correctly for us to finish
* waking the TCPC, but it has also set PD_EVENT_TCPC_RESET again, which
* would result in a second, unnecessary init.
*/
deprecated_atomic_clear_bits(task_get_event_bitmap(task_get_current()),
PD_EVENT_TCPC_RESET);
waiting_tasks =
deprecated_atomic_read_clear(&tc[port].tasks_waiting_on_reset);
/* Wake up all waiting tasks. */
while (waiting_tasks) {
task = __fls(waiting_tasks);
waiting_tasks &= ~BIT(task);
task_set_event(task, TASK_EVENT_PD_AWAKE, 0);
}
return rv;
}
#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
void pd_wait_exit_low_power(int port)
{
if (!TC_CHK_FLAG(port, TC_FLAGS_LPM_ENGAGED))
return;
if (port == TASK_ID_TO_PD_PORT(task_get_current())) {
if (!TC_CHK_FLAG(port, TC_FLAGS_LPM_TRANSITION))
reset_device_and_notify(port);
} else {
/* Otherwise, we need to wait for the TCPC reset to complete */
deprecated_atomic_or(&tc[port].tasks_waiting_on_reset,
1 << task_get_current());
/*
* NOTE: We could be sending the PD task the reset event while
* it is already processing the reset event. If that occurs,
* then we will reset the TCPC multiple times, which is
* undesirable but most likely benign. Empirically, this doesn't
* happen much, but it if starts occurring, we can add a guard
* to prevent/reduce it.
*/
task_set_event(PD_PORT_TO_TASK_ID(port),
PD_EVENT_TCPC_RESET, 0);
task_wait_event_mask(TASK_EVENT_PD_AWAKE, -1);
}
}
/*
* This can be called from any task. If we are in the PD task, we can handle
* immediately. Otherwise, we need to notify the PD task via event.
*/
void pd_device_accessed(int port)
{
if (port == TASK_ID_TO_PD_PORT(task_get_current()))
handle_device_access(port);
else
task_set_event(PD_PORT_TO_TASK_ID(port),
PD_EVENT_DEVICE_ACCESSED, 0);
}
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
void pd_prevent_low_power_mode(int port, int prevent)
{
const int current_task_mask = (1 << task_get_current());
if (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return;
if (prevent)
deprecated_atomic_or(&tc[port].tasks_preventing_lpm,
current_task_mask);
else
deprecated_atomic_clear_bits(&tc[port].tasks_preventing_lpm,
current_task_mask);
}
#endif /* CONFIG_USB_PD_TCPC_LOW_POWER */
static void sink_power_sub_states(int port)
{
enum tcpc_cc_voltage_status cc1, cc2, cc;
enum tcpc_cc_voltage_status new_cc_voltage;
tcpm_get_cc(port, &cc1, &cc2);
cc = tc[port].polarity ? cc2 : cc1;
if (cc == TYPEC_CC_VOLT_RP_DEF)
new_cc_voltage = TYPEC_CC_VOLT_RP_DEF;
else if (cc == TYPEC_CC_VOLT_RP_1_5)
new_cc_voltage = TYPEC_CC_VOLT_RP_1_5;
else if (cc == TYPEC_CC_VOLT_RP_3_0)
new_cc_voltage = TYPEC_CC_VOLT_RP_3_0;
else
new_cc_voltage = TYPEC_CC_VOLT_OPEN;
/* Debounce the cc state */
if (new_cc_voltage != tc[port].cc_voltage) {
tc[port].cc_voltage = new_cc_voltage;
tc[port].cc_debounce =
get_time().val + PD_T_RP_VALUE_CHANGE;
return;
}
if (tc[port].cc_debounce == 0 ||
get_time().val < tc[port].cc_debounce)
return;
tc[port].cc_debounce = 0;
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
tc[port].typec_curr = usb_get_typec_current_limit(
tc[port].polarity, cc1, cc2);
typec_set_input_current_limit(port,
tc[port].typec_curr, TYPE_C_VOLTAGE);
charge_manager_update_dualrole(port, CAP_DEDICATED);
}
}
/*
* TYPE-C State Implementations
*/
/**
* Disabled
*
* Super State Entry Actions:
* Remove the terminations from CC
* Set's VBUS and VCONN off
*/
static void tc_disabled_entry(const int port)
{
print_current_state(port);
}
static void tc_disabled_run(const int port)
{
/*
* If pd_set_suspend SUSPEND state changes to
* no longer be suspended then we need to exit
* our current state and go UNATTACHED_SNK
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_SUSPEND))
set_state_tc(port, TC_UNATTACHED_SNK);
task_wait_event(-1);
}
static void tc_disabled_exit(const int port)
{
if (!IS_ENABLED(CONFIG_USB_PD_TCPC)) {
if (tcpm_init(port) != 0) {
CPRINTS("C%d: TCPC restart failed!", port);
return;
}
}
CPRINTS("C%d: TCPC resumed!", port);
}
/**
* ErrorRecovery
*
* Super State Entry Actions:
* Remove the terminations from CC
* Set's VBUS and VCONN off
*/
static void tc_error_recovery_entry(const int port)
{
print_current_state(port);
tc[port].timeout = get_time().val + PD_T_ERROR_RECOVERY;
}
static void tc_error_recovery_run(const int port)
{
if (get_time().val < tc[port].timeout)
return;
/*
* If we transitioned to error recovery as the first state and we
* didn't brown out, we don't need to reinitialized the tc statemachine
* because we just did that. So transition to the state directly.
*/
if (tc[port].ctx.previous == NULL) {
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
/*
* If try src support is active (e.g. in S0). Then try to become the
* SRC, otherwise we should try to be the sink.
*/
#ifdef CONFIG_USB_PD_TRY_SRC
restart_tc_sm(port, is_try_src_enabled(port) ? TC_UNATTACHED_SRC :
TC_UNATTACHED_SNK);
#else
restart_tc_sm(port, TC_UNATTACHED_SNK);
#endif
}
/**
* Unattached.SNK
*/
static void tc_unattached_snk_entry(const int port)
{
if (get_last_state_tc(port) != TC_UNATTACHED_SRC) {
tc_detached(port);
print_current_state(port);
}
/*
* We are in an unattached state and considering to be a SNK
* searching for a SRC partner. We set the CC pull value to
* to indicate our intent to be SNK in hopes a partner SRC
* will is there to attach to.
*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rd.
*/
typec_select_pull(port, TYPEC_CC_RD);
typec_update_cc(port);
tc[port].data_role = PD_ROLE_DISCONNECTED;
/*
* When data role set events are used to enable BC1.2, then CC
* detach events are used to notify BC1.2 that it can be powered
* down.
*/
if (IS_ENABLED(CONFIG_BC12_DETECT_DATA_ROLE_TRIGGER))
bc12_role_change_handler(port);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_update_dualrole(port, CAP_UNKNOWN);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/* There is no source connected. */
ppc_dev_is_connected(port, PPC_DEV_DISCONNECTED);
/*
* Clear the overcurrent event counter
* since we've detected a disconnect.
*/
ppc_clear_oc_event_counter(port);
}
/*
* Indicate that the port is disconnected so the board
* can restore state from any previous data swap.
*/
pd_execute_data_swap(port, PD_ROLE_DISCONNECTED);
tc[port].next_role_swap = get_time().val + PD_T_DRP_SNK;
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
usb_mux_set(port, USB_PD_MUX_NONE,
USB_SWITCH_DISCONNECT, tc[port].polarity);
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
CLR_ALL_BUT_LPM_FLAGS(port);
tc_enable_pd(port, 0);
}
}
static void tc_unattached_snk_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
/*
* TODO(b/137498392): Add wait before sampling the CC
* status after role changes
*/
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
tc_set_data_role(port, PD_ROLE_UFP);
/* Inform Policy Engine that hard reset is complete */
pe_ps_reset_complete(port);
}
}
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
/*
* Attempt TCPC auto DRP toggle if it is
* not already auto toggling.
*/
if (IS_ENABLED(CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE) &&
drp_state[port] == PD_DRP_TOGGLE_ON &&
tcpm_auto_toggle_supported(port) && cc_is_open(cc1, cc2)) {
set_state_tc(port, TC_DRP_AUTO_TOGGLE);
return;
}
/*
* The port shall transition to AttachWait.SNK when a Source
* connection is detected, as indicated by the SNK.Rp state
* on at least one of its CC pins.
*
* A DRP shall transition to Unattached.SRC within tDRPTransition
* after the state of both CC pins is SNK.Open for
* tDRP − dcSRC.DRP ∙ tDRP.
*/
if (cc_is_rp(cc1) || cc_is_rp(cc2)) {
/* Connection Detected */
set_state_tc(port, TC_ATTACH_WAIT_SNK);
} else if (get_time().val > tc[port].next_role_swap &&
drp_state[port] == PD_DRP_TOGGLE_ON) {
/* DRP Toggle */
set_state_tc(port, TC_UNATTACHED_SRC);
} else if (IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER) &&
(drp_state[port] == PD_DRP_FORCE_SINK ||
drp_state[port] == PD_DRP_TOGGLE_OFF)) {
set_state_tc(port, TC_LOW_POWER_MODE);
}
}
/**
* AttachWait.SNK
*
* Super State Entry Actions:
* Vconn Off
* Place Rd on CC
* Set power role to SINK
*/
static void tc_attach_wait_snk_entry(const int port)
{
print_current_state(port);
tc[port].cc_state = PD_CC_UNSET;
}
static void tc_attach_wait_snk_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
enum pd_cc_states new_cc_state;
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
if (cc_is_rp(cc1) && cc_is_rp(cc2))
new_cc_state = PD_CC_DFP_DEBUG_ACC;
else if (cc_is_rp(cc1) || cc_is_rp(cc2))
new_cc_state = PD_CC_DFP_ATTACHED;
else
new_cc_state = PD_CC_NONE;
/* Debounce the cc state */
if (new_cc_state != tc[port].cc_state) {
tc[port].cc_debounce = get_time().val + PD_T_CC_DEBOUNCE;
tc[port].pd_debounce = get_time().val + PD_T_PD_DEBOUNCE;
tc[port].cc_state = new_cc_state;
return;
}
/*
* A DRP shall transition to Unattached.SRC when the state of both
* the CC1 and CC2 pins is SNK.Open for at least tPDDebounce, however
* when DRP state prevents switch to SRC the next state should be
* Unattached.SNK.
*/
if (new_cc_state == PD_CC_NONE &&
get_time().val > tc[port].pd_debounce) {
if (IS_ENABLED(CONFIG_USB_PE_SM) &&
IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
pd_dfp_exit_mode(port, TCPC_TX_SOP, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME_PRIME, 0, 0);
}
/* We are detached */
if (drp_state[port] == PD_DRP_TOGGLE_OFF
|| drp_state[port] == PD_DRP_FREEZE
|| drp_state[port] == PD_DRP_FORCE_SINK)
set_state_tc(port, TC_UNATTACHED_SNK);
else
set_state_tc(port, TC_UNATTACHED_SRC);
return;
}
/* Wait for CC debounce */
if (get_time().val < tc[port].cc_debounce)
return;
/*
* The port shall transition to Attached.SNK after the state of only
* one of the CC1 or CC2 pins is SNK.Rp for at least tCCDebounce and
* VBUS is detected.
*
* A DRP that strongly prefers the Source role may optionally
* transition to Try.SRC instead of Attached.SNK when the state of only
* one CC pin has been SNK.Rp for at least tCCDebounce and VBUS is
* detected.
*
* If the port supports Debug Accessory Mode, the port shall transition
* to DebugAccessory.SNK if the state of both the CC1 and CC2 pins is
* SNK.Rp for at least tCCDebounce and VBUS is detected.
*/
if (pd_is_vbus_present(port)) {
if (new_cc_state == PD_CC_DFP_ATTACHED) {
#ifdef CONFIG_USB_PD_TRY_SRC
if (is_try_src_enabled(port))
set_state_tc(port, TC_TRY_SRC);
else
#endif
set_state_tc(port, TC_ATTACHED_SNK);
} else {
/* new_cc_state is PD_CC_DFP_DEBUG_ACC */
CPRINTS("C%d: Debug accessory detected", port);
TC_SET_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
set_state_tc(port, TC_ATTACHED_SNK);
}
if (IS_ENABLED(CONFIG_USB_PE_SM) &&
IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
hook_call_deferred(&pd_usb_billboard_deferred_data,
PD_T_AME);
}
}
}
/**
* Attached.SNK, shared with Debug Accessory.SNK
*/
static void tc_attached_snk_entry(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
print_current_state(port);
/*
* Known state of attach is SNK. We need to apply this pull value
* to make it set in hardware at the correct time but set the common
* pull here.
*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rd.
*/
typec_select_pull(port, TYPEC_CC_RD);
/* Inform PPC that a source is connected. */
if (IS_ENABLED(CONFIG_USBC_PPC))
ppc_dev_is_connected(port, PPC_DEV_SRC);
#ifdef CONFIG_USB_PE_SM
if (TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
/* Flipping power role - Disable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 0);
/* Apply Rd */
typec_update_cc(port);
/* Change role to sink */
tc_set_power_role(port, PD_ROLE_SINK);
tcpm_set_msg_header(port, tc[port].power_role,
tc[port].data_role);
/*
* Maintain VCONN supply state, whether ON or OFF, and its
* data role / usb mux connections. Do not re-enable
* AutoDischargeDisconnect until the swap is completed
* and tc_pr_swap_complete is called.
*/
} else
#endif
{
/* Get connector orientation */
tcpm_get_cc(port, &cc1, &cc2);
tc[port].polarity = get_snk_polarity(cc1, cc2);
pd_set_polarity(port, tc[port].polarity);
tc_set_data_role(port, PD_ROLE_UFP);
hook_notify(HOOK_USB_PD_CONNECT);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
tc[port].typec_curr =
usb_get_typec_current_limit(tc[port].polarity,
cc1, cc2);
typec_set_input_current_limit(port,
tc[port].typec_curr, TYPE_C_VOLTAGE);
charge_manager_update_dualrole(port,
pd_is_port_partner_dualrole(port) ?
CAP_DUALROLE : CAP_DEDICATED);
}
/* Attached.SNK - enable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 1);
/* Apply Rd */
typec_update_cc(port);
}
tc[port].cc_debounce = 0;
/* Enable PD */
if (IS_ENABLED(CONFIG_USB_PE_SM))
tc_enable_pd(port, 1);
if (TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER))
tcpm_debug_accessory(port, 1);
}
static void tc_attached_snk_run(const int port)
{
#ifdef CONFIG_USB_PE_SM
/*
* Perform Hard Reset
*/
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
/*
* Wait to clear the hard reset request until Vbus has returned
* to default (or, if it didn't return, we transition to
* unattached)
*/
if (tc_perform_snk_hard_reset(port))
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
return;
}
/*
* From 4.5.2.2.5.2 Exiting from Attached.SNK State:
*
* "A port that is not a Vconn-Powered USB Device and is not in the
* process of a USB PD PR_Swap or a USB PD Hard Reset or a USB PD
* FR_Swap shall transition to Unattached.SNK within tSinkDisconnect
* when Vbus falls below vSinkDisconnect for Vbus operating at or
* below 5 V or below vSinkDisconnectPD when negotiated by USB PD
* to operate above 5 V."
*
* TODO(b/149530538): Use vSinkDisconnectPD when above 5V
*/
/*
* Debounce Vbus before we drop that we are doing a PR_Swap
*/
if (TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS) &&
tc[port].vbus_debounce_time < get_time().val) {
/* PR Swap is no longer in progress */
TC_CLR_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS);
/*
* AutoDischargeDisconnect was turned off when we
* hit Safe0V on SRC->SNK PR-Swap. We now are done
* with the swap and should have Vbus, so re-enable
* AutoDischargeDisconnect.
*/
if (!pd_check_vbus_level(port, VBUS_REMOVED))
tcpm_enable_auto_discharge_disconnect(port, 1);
}
/*
* The sink will be powered off during a power role swap but we don't
* want to trigger a disconnect.
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_POWER_OFF_SNK) &&
!TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
/*
* Detach detection
*/
if (pd_check_vbus_level(port, VBUS_REMOVED)) {
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
pd_dfp_exit_mode(port, TCPC_TX_SOP, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME_PRIME,
0, 0);
}
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
if (!pe_is_explicit_contract(port))
sink_power_sub_states(port);
}
/*
* PD swap commands
*/
if (tc_get_pd_enabled(port) && prl_is_running(port)) {
/*
* Power Role Swap
*/
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP)) {
/*
* We may want to verify partner is applying Rd before
* we swap. However, some TCPCs (such as TUSB422) will
* not report the correct CC status before VBUS falls to
* vSafe0V, so this will be problematic in the FRS case.
*/
set_state_tc(port, TC_ATTACHED_SRC);
return;
}
/*
* Data Role Swap
*/
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP);
/* Perform Data Role Swap */
tc_set_data_role(port,
tc[port].data_role == PD_ROLE_UFP ?
PD_ROLE_DFP : PD_ROLE_UFP);
}
#ifdef CONFIG_USBC_VCONN
/*
* VCONN Swap
* UnorientedDebugAccessory.SRC shall not drive Vconn
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER)) {
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_ON)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_ON);
set_vconn(port, 1);
/*
* Inform policy engine that vconn swap is
* complete
*/
pe_vconn_swap_complete(port);
} else if (TC_CHK_FLAG(port,
TC_FLAGS_REQUEST_VC_SWAP_OFF)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_OFF);
set_vconn(port, 0);
/*
* Inform policy engine that vconn swap is
* complete
*/
pe_vconn_swap_complete(port);
}
}
#endif
if (!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER)) {
/*
* If the port supports Charge-Through VCONN-Powered USB
* devices, and an explicit PD contract has failed to be
* negotiated, the port shall query the identity of the
* cable via USB PD on SOP’
*/
if (!pe_is_explicit_contract(port) &&
TC_CHK_FLAG(port, TC_FLAGS_CTVPD_DETECTED)) {
/*
* A port that via SOP’ has detected an
* attached Charge-Through VCONN-Powered USB
* device shall transition to Unattached.SRC
* if an explicit PD contract has failed to
* be negotiated.
*/
/* CTVPD detected */
set_state_tc(port, TC_UNATTACHED_SRC);
}
}
}
#else /* CONFIG_USB_PE_SM */
/* Detach detection */
if (pd_check_vbus_level(port, VBUS_REMOVED)) {
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
/* Run Sink Power Sub-State */
sink_power_sub_states(port);
#endif /* CONFIG_USB_PE_SM */
}
static void tc_attached_snk_exit(const int port)
{
if (!TC_CHK_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP)) {
/*
* If supplying VCONN, the port shall cease to supply
* it within tVCONNOFF of exiting Attached.SNK if not
* PR swapping.
*/
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
/*
* Attached.SNK exit - disable AutoDischargeDisconnect
* NOTE: This should not happen if we are suspending. It will
* happen in tc_cc_open_entry if that is the path we are
* taking.
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_SUSPEND))
tcpm_enable_auto_discharge_disconnect(port, 0);
}
/* Clear flags after checking Vconn status */
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP | TC_FLAGS_POWER_OFF_SNK);
/* Stop drawing power */
sink_stop_drawing_current(port);
}
/**
* Unattached.SRC
*/
static void tc_unattached_src_entry(const int port)
{
if (get_last_state_tc(port) != TC_UNATTACHED_SNK) {
tc_detached(port);
print_current_state(port);
}
/*
* We are in an unattached state and considering to be a SRC
* searching for a SNK partner. We set the CC pull value to
* to indicate our intent to be SRC in hopes a partner SNK
* will is there to attach to.
*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rp.
*/
typec_select_pull(port, TYPEC_CC_RP);
typec_select_src_current_limit_rp(port, CONFIG_USB_PD_PULLUP);
typec_update_cc(port);
tc[port].data_role = PD_ROLE_DISCONNECTED;
/*
* When data role set events are used to enable BC1.2, then CC
* detach events are used to notify BC1.2 that it can be powered
* down.
*/
if (IS_ENABLED(CONFIG_BC12_DETECT_DATA_ROLE_TRIGGER))
bc12_role_change_handler(port);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/* There is no sink connected. */
ppc_dev_is_connected(port, PPC_DEV_DISCONNECTED);
/*
* Clear the overcurrent event counter
* since we've detected a disconnect.
*/
ppc_clear_oc_event_counter(port);
}
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_update_dualrole(port, CAP_UNKNOWN);
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
CLR_ALL_BUT_LPM_FLAGS(port);
tc_enable_pd(port, 0);
}
tc[port].next_role_swap = get_time().val + PD_T_DRP_SRC;
}
static void tc_unattached_src_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
tc_set_data_role(port, PD_ROLE_DFP);
/* Inform Policy Engine that hard reset is complete */
pe_ps_reset_complete(port);
}
}
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/*
* If the port is latched off, just continue to
* monitor for a detach.
*/
if (ppc_is_port_latched_off(port))
return;
}
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
/*
* Transition to AttachWait.SRC when:
* 1) The SRC.Rd state is detected on either CC1 or CC2 pin or
* 2) The SRC.Ra state is detected on both the CC1 and CC2 pins.
*
* A DRP shall transition to Unattached.SNK within tDRPTransition
* after dcSRC.DRP ∙ tDRP
*/
if (cc_is_at_least_one_rd(cc1, cc2) || cc_is_audio_acc(cc1, cc2))
set_state_tc(port, TC_ATTACH_WAIT_SRC);
else if (get_time().val > tc[port].next_role_swap &&
drp_state[port] != PD_DRP_FORCE_SOURCE &&
drp_state[port] != PD_DRP_FREEZE)
set_state_tc(port, TC_UNATTACHED_SNK);
/*
* Attempt TCPC auto DRP toggle
*/
else if (IS_ENABLED(CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE) &&
drp_state[port] == PD_DRP_TOGGLE_ON &&
tcpm_auto_toggle_supported(port) && cc_is_open(cc1, cc2))
set_state_tc(port, TC_DRP_AUTO_TOGGLE);
else if (IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER) &&
(drp_state[port] == PD_DRP_FORCE_SOURCE ||
drp_state[port] == PD_DRP_TOGGLE_OFF))
set_state_tc(port, TC_LOW_POWER_MODE);
}
/**
* AttachWait.SRC
*
* Super State Entry Actions:
* Vconn Off
* Place Rp on CC
* Set power role to SOURCE
*/
static void tc_attach_wait_src_entry(const int port)
{
print_current_state(port);
tc[port].cc_state = PD_CC_UNSET;
}
static void tc_attach_wait_src_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
enum pd_cc_states new_cc_state;
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
/* Debug accessory */
if (cc_is_snk_dbg_acc(cc1, cc2)) {
/* Debug accessory */
new_cc_state = PD_CC_UFP_DEBUG_ACC;
} else if (cc_is_at_least_one_rd(cc1, cc2)) {
/* UFP attached */
new_cc_state = PD_CC_UFP_ATTACHED;
} else if (cc_is_audio_acc(cc1, cc2)) {
/* AUDIO Accessory not supported. Just ignore */
new_cc_state = PD_CC_UFP_AUDIO_ACC;
} else {
/* No UFP */
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
/* Debounce the cc state */
if (new_cc_state != tc[port].cc_state) {
tc[port].cc_debounce = get_time().val + PD_T_CC_DEBOUNCE;
tc[port].cc_state = new_cc_state;
return;
}
/* Wait for CC debounce */
if (get_time().val < tc[port].cc_debounce)
return;
/*
* The port shall transition to Attached.SRC when VBUS is at vSafe0V
* and the SRC.Rd state is detected on exactly one of the CC1 or CC2
* pins for at least tCCDebounce.
*
* If the port supports Debug Accessory Mode, it shall transition to
* UnorientedDebugAccessory.SRC when VBUS is at vSafe0V and the SRC.Rd
* state is detected on both the CC1 and CC2 pins for at least
* tCCDebounce.
*/
if (pd_check_vbus_level(port, VBUS_SAFE0V)) {
if (new_cc_state == PD_CC_UFP_ATTACHED) {
set_state_tc(port, TC_ATTACHED_SRC);
return;
} else if (new_cc_state == PD_CC_UFP_DEBUG_ACC) {
CPRINTS("C%d: Debug accessory detected", port);
TC_SET_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
set_state_tc(port, TC_ATTACHED_SRC);
return;
}
}
}
/**
* Attached.SRC, shared with UnorientedDebugAccessory.SRC
*/
static void tc_attached_src_entry(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
print_current_state(port);
/* Run function relies on timeout being 0 or meaningful */
tc[port].timeout = 0;
/*
* Known state of attach is SRC. We need to apply this pull value
* to make it set in hardware at the correct time but set the common
* pull here.
*
* Both CC1 and CC2 pins shall be independently terminated to
* pulled up through Rp.
*/
typec_select_pull(port, TYPEC_CC_RP);
typec_select_src_current_limit_rp(port, CONFIG_USB_PD_PULLUP);
#if defined(CONFIG_USB_PE_SM)
if (TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
/* Change role to source */
tc_set_power_role(port, PD_ROLE_SOURCE);
tcpm_set_msg_header(port,
tc[port].power_role, tc[port].data_role);
/* Enable VBUS */
tc_src_power_on(port);
/* Apply Rp */
typec_update_cc(port);
/*
* Maintain VCONN supply state, whether ON or OFF, and its
* data role / usb mux connections. Do not re-enable
* AutoDischargeDisconnect until the swap is completed
* and tc_pr_swap_complete is called.
*/
} else {
/* Get connector orientation */
tcpm_get_cc(port, &cc1, &cc2);
tc[port].polarity = get_src_polarity(cc1, cc2);
pd_set_polarity(port, tc[port].polarity);
/*
* Initial data role for sink is DFP
* This also sets the usb mux
*/
tc_set_data_role(port, PD_ROLE_DFP);
/*
* Start sourcing Vconn before Vbus to ensure
* we are within USB Type-C Spec 1.4 tVconnON
*
* UnorientedDebugAccessory.SRC shall not drive Vconn
*/
if (IS_ENABLED(CONFIG_USBC_VCONN) &&
!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER))
set_vconn(port, 1);
/* Enable VBUS */
if (tc_src_power_on(port)) {
/* Stop sourcing Vconn if Vbus failed */
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 0);
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
usb_mux_set(port, USB_PD_MUX_NONE,
USB_SWITCH_DISCONNECT, tc[port].polarity);
}
/* Attached.SRC - enable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 1);
/* Apply Rp */
typec_update_cc(port);
tc_enable_pd(port, 0);
tc[port].timeout = get_time().val +
MAX(PD_POWER_SUPPLY_TURN_ON_DELAY, PD_T_VCONN_STABLE);
}
#else
/* Get connector orientation */
tcpm_get_cc(port, &cc1, &cc2);
tc[port].polarity = get_src_polarity(cc1, cc2);
pd_set_polarity(port, tc[port].polarity);
/*
* Initial data role for sink is DFP
* This also sets the usb mux
*/
tc_set_data_role(port, PD_ROLE_DFP);
/*
* Start sourcing Vconn before Vbus to ensure
* we are within USB Type-C Spec 1.4 tVconnON
*
* UnorientedDebugAccessory.SRC shall not drive Vconn
*/
if (IS_ENABLED(CONFIG_USBC_VCONN) &&
!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER))
set_vconn(port, 1);
/* Enable VBUS */
if (tc_src_power_on(port)) {
/* Stop sourcing Vconn if Vbus failed */
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 0);
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
usb_mux_set(port, USB_PD_MUX_NONE,
USB_SWITCH_DISCONNECT, tc[port].polarity);
}
/* Attached.SRC - enable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 1);
/* Apply Rp */
typec_update_cc(port);
#endif /* CONFIG_USB_PE_SM */
/* Inform PPC that a sink is connected. */
if (IS_ENABLED(CONFIG_USBC_PPC))
ppc_dev_is_connected(port, PPC_DEV_SNK);
/*
* Only notify if we're not performing a power role swap. During a
* power role swap, the port partner is not disconnecting/connecting.
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
hook_notify(HOOK_USB_PD_CONNECT);
}
if (TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER))
tcpm_debug_accessory(port, 1);
}
static void tc_attached_src_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
if (tc[port].polarity)
cc1 = cc2;
if (cc1 == TYPEC_CC_VOLT_OPEN)
tc[port].cc_state = PD_CC_NONE;
else
tc[port].cc_state = PD_CC_UFP_ATTACHED;
/*
* When the SRC.Open state is detected on the monitored CC pin, a DRP
* shall transition to Unattached.SNK unless it strongly prefers the
* Source role. In that case, it shall transition to TryWait.SNK.
* This transition to TryWait.SNK is needed so that two devices that
* both prefer the Source role do not loop endlessly between Source
* and Sink. In other words, a DRP that would enter Try.SRC from
* AttachWait.SNK shall enter TryWait.SNK for a Sink detach from
* Attached.SRC.
*/
if (tc[port].cc_state == PD_CC_NONE &&
!TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS) &&
!TC_CHK_FLAG(port, TC_FLAGS_DISC_IDENT_IN_PROGRESS)) {
#ifdef CONFIG_USB_PD_TRY_SRC
const bool tryWait = is_try_src_enabled(port) &&
!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
#endif
if (IS_ENABLED(CONFIG_USB_PE_SM))
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
pd_dfp_exit_mode(port, TCPC_TX_SOP, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME_PRIME,
0, 0);
}
#ifdef CONFIG_USB_PD_TRY_SRC
set_state_tc(port, tryWait ?
TC_TRY_WAIT_SNK : TC_UNATTACHED_SNK);
#else
set_state_tc(port, TC_UNATTACHED_SNK);
#endif
return;
}
#ifdef CONFIG_USB_PE_SM
/*
* Enable PD communications after power supply has fully
* turned on
*/
if (tc[port].timeout > 0 && get_time().val > tc[port].timeout) {
tc_enable_pd(port, 1);
tc[port].timeout = 0;
}
if (!tc_get_pd_enabled(port))
return;
/*
* Handle Hard Reset from Policy Engine
*/
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
/* Ignoring Hard Resets while the power supply is resetting.*/
if (get_time().val < tc[port].timeout)
return;
if (tc_perform_src_hard_reset(port))
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
return;
}
/*
* PD swap commands
*/
if (tc_get_pd_enabled(port) && prl_is_running(port)) {
/*
* Power Role Swap Request
*/
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP)) {
/* Clear TC_FLAGS_REQUEST_PR_SWAP on exit */
return set_state_tc(port, TC_ATTACHED_SNK);
}
/*
* Data Role Swap Request
*/
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP);
/* Perform Data Role Swap */
tc_set_data_role(port,
tc[port].data_role == PD_ROLE_DFP ?
PD_ROLE_UFP : PD_ROLE_DFP);
}
/*
* Vconn Swap Request
* UnorientedDebugAccessory.SRC shall not drive Vconn
*/
if (IS_ENABLED(CONFIG_USBC_VCONN) &&
!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER)) {
/*
* VCONN Swap Request
*/
if (TC_CHK_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_ON)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_ON);
set_vconn(port, 1);
pe_vconn_swap_complete(port);
} else if (TC_CHK_FLAG(port,
TC_FLAGS_REQUEST_VC_SWAP_OFF)) {
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_VC_SWAP_OFF);
set_vconn(port, 0);
pe_vconn_swap_complete(port);
}
}
/*
* A DRP that supports Charge-Through VCONN-Powered USB Devices
* shall transition to CTUnattached.SNK if the connected device
* identifies itself as a Charge-Through VCONN-Powered USB
* Device in its Discover Identity Command response.
*/
/*
* A DRP that supports Charge-Through VCONN-Powered USB Devices
* shall transition to CTUnattached.SNK if the connected device
* identifies itself as a Charge-Through VCONN-Powered USB
* Device in its Discover Identity Command response.
*
* If it detects that it is connected to a VCONN-Powered USB
* Device, the port may remove VBUS and discharge it to
* vSafe0V, while continuing to remain in this state with VCONN
* applied.
*/
if (!TC_CHK_FLAG(port, TC_FLAGS_TS_DTS_PARTNER) &&
TC_CHK_FLAG(port, TC_FLAGS_CTVPD_DETECTED)) {
TC_CLR_FLAG(port, TC_FLAGS_CTVPD_DETECTED);
/* Clear TC_FLAGS_DISC_IDENT_IN_PROGRESS */
TC_CLR_FLAG(port, TC_FLAGS_DISC_IDENT_IN_PROGRESS);
set_state_tc(port, TC_CT_UNATTACHED_SNK);
}
}
#endif
}
static void tc_attached_src_exit(const int port)
{
/*
* A port shall cease to supply VBUS within tVBUSOFF of exiting
* Attached.SRC.
*/
tc_src_power_off(port);
if (!TC_CHK_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP)) {
/* Attached.SRC exit - disable AutoDischargeDisconnect */
tcpm_enable_auto_discharge_disconnect(port, 0);
/* Disable VCONN if not power role swapping */
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
}
/* Clear PR swap flag after checking for Vconn */
TC_CLR_FLAG(port, TC_FLAGS_REQUEST_PR_SWAP);
}
static __maybe_unused void check_drp_connection(const int port)
{
enum pd_drp_next_states next_state;
enum tcpc_cc_voltage_status cc1, cc2;
TC_CLR_FLAG(port, TC_FLAGS_CHECK_CONNECTION);
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
tc[port].drp_sink_time = get_time().val;
/* Get the next toggle state */
next_state = drp_auto_toggle_next_state(&tc[port].drp_sink_time,
tc[port].power_role, drp_state[port], cc1, cc2,
tcpm_auto_toggle_supported(port));
if (next_state == DRP_TC_DEFAULT)
next_state = (PD_ROLE_DEFAULT(port) == PD_ROLE_SOURCE)
? DRP_TC_UNATTACHED_SRC
: DRP_TC_UNATTACHED_SNK;
switch (next_state) {
case DRP_TC_UNATTACHED_SNK:
set_state_tc(port, TC_UNATTACHED_SNK);
break;
case DRP_TC_ATTACHED_WAIT_SNK:
set_state_tc(port, TC_ATTACH_WAIT_SNK);
break;
case DRP_TC_UNATTACHED_SRC:
set_state_tc(port, TC_UNATTACHED_SRC);
break;
case DRP_TC_ATTACHED_WAIT_SRC:
set_state_tc(port, TC_ATTACH_WAIT_SRC);
break;
#ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
case DRP_TC_DRP_AUTO_TOGGLE:
set_state_tc(port, TC_DRP_AUTO_TOGGLE);
break;
#endif
default:
CPRINTS("C%d: Error: DRP next state %d", port, next_state);
break;
}
}
#ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
/**
* DrpAutoToggle
*/
static void tc_drp_auto_toggle_entry(const int port)
{
print_current_state(port);
/*
* We need to ensure that we are waiting in the previous Rd or Rp state
* for the minimum of DRP SNK or SRC so the first toggle cause by
* transition into auto toggle doesn't violate spec timing.
*/
tc[port].timeout = get_time().val + MAX(PD_T_DRP_SNK, PD_T_DRP_SRC);
}
static void tc_drp_auto_toggle_run(const int port)
{
/*
* A timer is running, but if a connection comes in while waiting
* then allow that to take higher priority.
*/
if (TC_CHK_FLAG(port, TC_FLAGS_CHECK_CONNECTION))
check_drp_connection(port);
else if (tc[port].timeout != TIMER_DISABLED) {
if (tc[port].timeout > get_time().val)
return;
tc[port].timeout = TIMER_DISABLED;
tcpm_enable_drp_toggle(port);
if (IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER)) {
set_state_tc(port, TC_LOW_POWER_MODE);
}
}
}
#endif /* CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE */
#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
static void tc_low_power_mode_entry(const int port)
{
print_current_state(port);
tc[port].low_power_time = get_time().val + PD_LPM_DEBOUNCE_US;
tc[port].low_power_exit_time = 0;
}
static void tc_low_power_mode_run(const int port)
{
if (TC_CHK_FLAG(port, TC_FLAGS_CHECK_CONNECTION)) {
uint64_t now = get_time().val;
tc_start_event_loop(port);
if (tc[port].low_power_exit_time == 0) {
tc[port].low_power_exit_time = now
+ PD_LPM_EXIT_DEBOUNCE_US;
} else if (now > tc[port].low_power_exit_time) {
CPRINTS("C%d: Exit Low Power Mode", port);
check_drp_connection(port);
}
return;
}
if (tc[port].tasks_preventing_lpm)
tc[port].low_power_time = get_time().val + PD_LPM_DEBOUNCE_US;
if (get_time().val > tc[port].low_power_time) {
CPRINTS("C%d: TCPC Enter Low Power Mode", port);
TC_SET_FLAG(port, TC_FLAGS_LPM_ENGAGED);
TC_SET_FLAG(port, TC_FLAGS_LPM_TRANSITION);
tcpm_enter_low_power_mode(port);
TC_CLR_FLAG(port, TC_FLAGS_LPM_TRANSITION);
tc_pause_event_loop(port);
tc[port].low_power_exit_time = 0;
}
}
#endif /* CONFIG_USB_PD_TCPC_LOW_POWER */
/**
* Try.SRC
*
* Super State Entry Actions:
* Vconn Off
* Place Rp on CC
* Set power role to SOURCE
*/
#ifdef CONFIG_USB_PD_TRY_SRC
static void tc_try_src_entry(const int port)
{
print_current_state(port);
tc[port].cc_state = PD_CC_UNSET;
tc[port].try_wait_debounce = get_time().val + PD_T_DRP_TRY;
tc[port].timeout = get_time().val + PD_T_TRY_TIMEOUT;
/*
* We are a SNK but would prefer to be a SRC. Set the pull to
* indicate we want to be a SRC and looking for a SNK.
*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rp.
*/
typec_select_pull(port, TYPEC_CC_RP);
typec_select_src_current_limit_rp(port, CONFIG_USB_PD_PULLUP);
/* Apply Rp */
typec_update_cc(port);
}
static void tc_try_src_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
enum pd_cc_states new_cc_state;
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
if ((cc1 == TYPEC_CC_VOLT_RD && cc2 != TYPEC_CC_VOLT_RD) ||
(cc1 != TYPEC_CC_VOLT_RD && cc2 == TYPEC_CC_VOLT_RD))
new_cc_state = PD_CC_UFP_ATTACHED;
else
new_cc_state = PD_CC_NONE;
/* Debounce the cc state */
if (new_cc_state != tc[port].cc_state) {
tc[port].cc_state = new_cc_state;
tc[port].cc_debounce = get_time().val + PD_T_CC_DEBOUNCE;
}
/*
* The port shall transition to Attached.SRC when the SRC.Rd state is
* detected on exactly one of the CC1 or CC2 pins for at least
* tTryCCDebounce.
*/
if (get_time().val > tc[port].cc_debounce &&
new_cc_state == PD_CC_UFP_ATTACHED)
set_state_tc(port, TC_ATTACHED_SRC);
/*
* The port shall transition to TryWait.SNK after tDRPTry and the
* SRC.Rd state has not been detected and VBUS is within vSafe0V,
* or after tTryTimeout and the SRC.Rd state has not been detected.
*/
if (new_cc_state == PD_CC_NONE) {
if ((get_time().val > tc[port].try_wait_debounce &&
pd_check_vbus_level(port, VBUS_SAFE0V)) ||
get_time().val > tc[port].timeout) {
set_state_tc(port, TC_TRY_WAIT_SNK);
}
}
}
/**
* TryWait.SNK
*
* Super State Entry Actions:
* Vconn Off
* Place Rd on CC
* Set power role to SINK
*/
static void tc_try_wait_snk_entry(const int port)
{
print_current_state(port);
tc_enable_pd(port, 0);
tc[port].cc_state = PD_CC_UNSET;
tc[port].try_wait_debounce = get_time().val + PD_T_CC_DEBOUNCE;
/*
* We were a SNK, tried to be a SRC and it didn't work out. Try to
* go back to being a SNK. Set the pull to indicate we want to be
* a SNK and looking for a SRC.
*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rd.
*/
typec_select_pull(port, TYPEC_CC_RD);
/* Apply Rd */
typec_update_cc(port);
}
static void tc_try_wait_snk_run(const int port)
{
enum tcpc_cc_voltage_status cc1, cc2;
enum pd_cc_states new_cc_state;
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
/* We only care about CCs being open */
if (cc1 == TYPEC_CC_VOLT_OPEN && cc2 == TYPEC_CC_VOLT_OPEN)
new_cc_state = PD_CC_NONE;
else
new_cc_state = PD_CC_UNSET;
/* Debounce the cc state */
if (new_cc_state != tc[port].cc_state) {
tc[port].cc_state = new_cc_state;
tc[port].pd_debounce = get_time().val + PD_T_PD_DEBOUNCE;
}
/*
* The port shall transition to Unattached.SNK when the state of both
* of the CC1 and CC2 pins is SNK.Open for at least tPDDebounce.
*/
if ((get_time().val > tc[port].pd_debounce) &&
(new_cc_state == PD_CC_NONE)) {
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
/*
* The port shall transition to Attached.SNK after tCCDebounce if or
* when VBUS is detected.
*/
if (get_time().val > tc[port].try_wait_debounce &&
pd_is_vbus_present(port))
set_state_tc(port, TC_ATTACHED_SNK);
}
#endif
#if defined(CONFIG_USB_PE_SM)
/*
* CTUnattached.SNK
*/
static void tc_ct_unattached_snk_entry(int port)
{
print_current_state(port);
/*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rd.
*/
typec_select_pull(port, TYPEC_CC_RD);
typec_select_src_current_limit_rp(port, CONFIG_USB_PD_PULLUP);
typec_update_cc(port);
tc[port].cc_state = PD_CC_UNSET;
/* Set power role to sink */
tc_set_power_role(port, PD_ROLE_SINK);
tcpm_set_msg_header(port, tc[port].power_role, tc[port].data_role);
/*
* The policy engine is in the disabled state. Disable PD and
* re-enable it
*/
tc_enable_pd(port, 0);
tc[port].timeout = get_time().val + PD_POWER_SUPPLY_TURN_ON_DELAY;
}
static void tc_ct_unattached_snk_run(int port)
{
enum tcpc_cc_voltage_status cc1;
enum tcpc_cc_voltage_status cc2;
enum pd_cc_states new_cc_state;
if (tc[port].timeout > 0 && get_time().val > tc[port].timeout) {
tc_enable_pd(port, 1);
tc[port].timeout = 0;
}
if (tc[port].timeout > 0)
return;
/* Wait until Protocol Layer is ready */
if (!prl_is_running(port))
return;
/*
* Hard Reset is sent when the PE layer is disabled due to a
* CTVPD connection.
*/
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
/* Nothing to do. Just signal hard reset completion */
pe_ps_reset_complete(port);
}
/* Check for connection */
tcpm_get_cc(port, &cc1, &cc2);
/* We only care about CCs being open */
if (cc1 == TYPEC_CC_VOLT_OPEN && cc2 == TYPEC_CC_VOLT_OPEN)
new_cc_state = PD_CC_NONE;
else
new_cc_state = PD_CC_UNSET;
/* Debounce the cc state */
if (new_cc_state != tc[port].cc_state) {
tc[port].cc_state = new_cc_state;
tc[port].cc_debounce = get_time().val + PD_T_VPDDETACH;
}
/*
* The port shall transition to Unattached.SNK if the state of
* the CC pin is SNK.Open for tVPDDetach after VBUS is vSafe0V.
*/
if (get_time().val > tc[port].cc_debounce) {
if (new_cc_state == PD_CC_NONE &&
pd_check_vbus_level(port, VBUS_SAFE0V)) {
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
pd_dfp_exit_mode(port, TCPC_TX_SOP, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME, 0, 0);
pd_dfp_exit_mode(port, TCPC_TX_SOP_PRIME_PRIME,
0, 0);
}
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
}
/*
* The port shall transition to CTAttached.SNK when VBUS is detected.
*/
if (pd_is_vbus_present(port))
set_state_tc(port, TC_CT_ATTACHED_SNK);
}
/**
* CTAttached.SNK
*/
static void tc_ct_attached_snk_entry(int port)
{
print_current_state(port);
/* The port shall reject a VCONN swap request. */
TC_SET_FLAG(port, TC_FLAGS_REJECT_VCONN_SWAP);
}
static void tc_ct_attached_snk_run(int port)
{
/*
* Hard Reset is sent when the PE layer is disabled due to a
* CTVPD connection.
*/
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET_REQUESTED);
/* Nothing to do. Just signal hard reset completion */
pe_ps_reset_complete(port);
}
/*
* A port that is not in the process of a USB PD Hard Reset shall
* transition to CTUnattached.SNK within tSinkDisconnect when VBUS
* falls below vSinkDisconnect
*/
if (pd_check_vbus_level(port, VBUS_REMOVED)) {
set_state_tc(port, TC_CT_UNATTACHED_SNK);
return;
}
/*
* The port shall operate in one of the Sink Power Sub-States
* and remain within the Sink Power Sub-States, until either VBUS is
* removed or a USB PD contract is established with the source.
*/
if (!pe_is_explicit_contract(port))
sink_power_sub_states(port);
}
static void tc_ct_attached_snk_exit(int port)
{
/* Stop drawing power */
sink_stop_drawing_current(port);
TC_CLR_FLAG(port, TC_FLAGS_REJECT_VCONN_SWAP);
}
#endif /* CONFIG_USB_PE_SM */
/**
* Super State CC_RD
*/
static void tc_cc_rd_entry(const int port)
{
/* Disable VCONN */
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 0);
/* Set power role to sink */
tc_set_power_role(port, PD_ROLE_SINK);
tcpm_set_msg_header(port, tc[port].power_role, tc[port].data_role);
}
/**
* Super State CC_RP
*/
static void tc_cc_rp_entry(const int port)
{
/* Disable VCONN */
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 0);
/* Set power role to source */
tc_set_power_role(port, PD_ROLE_SOURCE);
tcpm_set_msg_header(port, tc[port].power_role, tc[port].data_role);
}
/**
* Super State CC_OPEN
*/
static void tc_cc_open_entry(const int port)
{
/* Ensure we are not sourcing Vbus */
tc_src_power_off(port);
/* Disable VCONN */
set_vconn(port, 0);
/*
* Ensure we disable discharging before setting CC lines to open.
* If we were sourcing above, then we already drained Vbus. If partner
* is sourcing Vbus they will drain Vbus if they are PD-capable. This
* should only be done if a battery is present as a batteryless
* device will brown out when AutoDischargeDisconnect is disabled and
* we do not want this to happen until the set_cc open/open to make
* sure the TCPC has managed its internal states for disconnecting
* the only source of power it has.
*/
if (battery_is_present())
tcpm_enable_auto_discharge_disconnect(port, 0);
/* We may brown out after applying CC open, so flush console first. */
CPRINTS("C%d: Applying CC Open!", port);
cflush();
/* Remove terminations from CC */
typec_select_pull(port, TYPEC_CC_OPEN);
typec_update_cc(port);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/* There is no device connected. */
ppc_dev_is_connected(port, PPC_DEV_DISCONNECTED);
/*
* Clear the overcurrent event counter
* since we've detected a disconnect.
*/
ppc_clear_oc_event_counter(port);
}
}
void tc_set_debug_level(enum debug_level debug_level)
{
#ifndef CONFIG_USB_PD_DEBUG_LEVEL
tc_debug_level = debug_level;
#endif
}
void tc_run(const int port)
{
/*
* If pd_set_suspend SUSPEND state changes to
* be suspended then we need to go directly to
* DISABLED
*/
if (TC_CHK_FLAG(port, TC_FLAGS_SUSPEND)) {
#ifdef CONFIG_USB_PE_SM
/* Invalidate a contract, if there is one */
pe_invalidate_explicit_contract(port);
#endif
set_state_tc(port, TC_DISABLED);
}
run_state(port, &tc[port].ctx);
}
static void pd_chipset_resume(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
pd_set_dual_role_and_event(i,
PD_DRP_TOGGLE_ON,
PD_EVENT_UPDATE_DUAL_ROLE
| PD_EVENT_POWER_STATE_CHANGE);
}
CPRINTS("PD:S3->S0");
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, pd_chipset_resume, HOOK_PRIO_DEFAULT);
static void pd_chipset_suspend(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
pd_set_dual_role_and_event(i,
pd_get_drp_state_in_suspend(),
PD_EVENT_UPDATE_DUAL_ROLE
| PD_EVENT_POWER_STATE_CHANGE);
}
CPRINTS("PD:S0->S3");
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, pd_chipset_suspend, HOOK_PRIO_DEFAULT);
static void pd_chipset_startup(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
set_usb_mux_with_current_data_role(i);
pd_set_dual_role_and_event(i,
pd_get_drp_state_in_suspend(),
PD_EVENT_UPDATE_DUAL_ROLE
| PD_EVENT_POWER_STATE_CHANGE);
/*
* Request port discovery to restore any
* alt modes.
* TODO(b/158042116): Do not start port discovery if there
* is an existing connection.
*/
if (IS_ENABLED(CONFIG_USB_PE_SM))
pd_dpm_request(i, DPM_REQUEST_PORT_DISCOVERY);
}
CPRINTS("PD:S5->S3");
}
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, pd_chipset_startup, HOOK_PRIO_DEFAULT);
static void pd_chipset_shutdown(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_MAX_COUNT; i++) {
pd_set_dual_role_and_event(i,
PD_DRP_FORCE_SINK,
PD_EVENT_UPDATE_DUAL_ROLE
| PD_EVENT_POWER_STATE_CHANGE);
}
CPRINTS("PD:S3->S5");
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, pd_chipset_shutdown, HOOK_PRIO_DEFAULT);
/*
* Type-C State Hierarchy (Sub-States are listed inside the boxes)
*
* |TC_CC_RD --------------| |TC_CC_RP ------------------------|
* | | | |
* | TC_UNATTACHED_SNK | | TC_UNATTACHED_SRC |
* | TC_ATTACH_WAIT_SNK | | TC_ATTACH_WAIT_SRC |
* | TC_TRY_WAIT_SNK | | TC_TRY_SRC |
* |-----------------------| |---------------------------------|
*
* |TC_CC_OPEN -----------|
* | |
* | TC_DISABLED |
* | TC_ERROR_RECOVERY |
* |----------------------|
*
* TC_ATTACHED_SNK TC_ATTACHED_SRC TC_DRP_AUTO_TOGGLE TC_LOW_POWER_MODE
*
*/
static const struct usb_state tc_states[] = {
/* Super States */
[TC_CC_OPEN] = {
.entry = tc_cc_open_entry,
},
[TC_CC_RD] = {
.entry = tc_cc_rd_entry,
},
[TC_CC_RP] = {
.entry = tc_cc_rp_entry,
},
/* Normal States */
[TC_DISABLED] = {
.entry = tc_disabled_entry,
.run = tc_disabled_run,
.exit = tc_disabled_exit,
.parent = &tc_states[TC_CC_OPEN],
},
[TC_ERROR_RECOVERY] = {
.entry = tc_error_recovery_entry,
.run = tc_error_recovery_run,
.parent = &tc_states[TC_CC_OPEN],
},
[TC_UNATTACHED_SNK] = {
.entry = tc_unattached_snk_entry,
.run = tc_unattached_snk_run,
.parent = &tc_states[TC_CC_RD],
},
[TC_ATTACH_WAIT_SNK] = {
.entry = tc_attach_wait_snk_entry,
.run = tc_attach_wait_snk_run,
.parent = &tc_states[TC_CC_RD],
},
[TC_ATTACHED_SNK] = {
.entry = tc_attached_snk_entry,
.run = tc_attached_snk_run,
.exit = tc_attached_snk_exit,
},
[TC_UNATTACHED_SRC] = {
.entry = tc_unattached_src_entry,
.run = tc_unattached_src_run,
.parent = &tc_states[TC_CC_RP],
},
[TC_ATTACH_WAIT_SRC] = {
.entry = tc_attach_wait_src_entry,
.run = tc_attach_wait_src_run,
.parent = &tc_states[TC_CC_RP],
},
[TC_ATTACHED_SRC] = {
.entry = tc_attached_src_entry,
.run = tc_attached_src_run,
.exit = tc_attached_src_exit,
},
#ifdef CONFIG_USB_PD_TRY_SRC
[TC_TRY_SRC] = {
.entry = tc_try_src_entry,
.run = tc_try_src_run,
.parent = &tc_states[TC_CC_RP],
},
[TC_TRY_WAIT_SNK] = {
.entry = tc_try_wait_snk_entry,
.run = tc_try_wait_snk_run,
.parent = &tc_states[TC_CC_RD],
},
#endif /* CONFIG_USB_PD_TRY_SRC */
#ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE
[TC_DRP_AUTO_TOGGLE] = {
.entry = tc_drp_auto_toggle_entry,
.run = tc_drp_auto_toggle_run,
},
#endif /* CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE */
#ifdef CONFIG_USB_PD_TCPC_LOW_POWER
[TC_LOW_POWER_MODE] = {
.entry = tc_low_power_mode_entry,
.run = tc_low_power_mode_run,
},
#endif /* CONFIG_USB_PD_TCPC_LOW_POWER */
#ifdef CONFIG_USB_PE_SM
[TC_CT_UNATTACHED_SNK] = {
.entry = tc_ct_unattached_snk_entry,
.run = tc_ct_unattached_snk_run,
},
[TC_CT_ATTACHED_SNK] = {
.entry = tc_ct_attached_snk_entry,
.run = tc_ct_attached_snk_run,
.exit = tc_ct_attached_snk_exit,
},
#endif
};
#if defined(TEST_BUILD) && defined(USB_PD_DEBUG_LABELS)
const struct test_sm_data test_tc_sm_data[] = {
{
.base = tc_states,
.size = ARRAY_SIZE(tc_states),
.names = tc_state_names,
.names_size = ARRAY_SIZE(tc_state_names),
},
};
const int test_tc_sm_data_size = ARRAY_SIZE(test_tc_sm_data);
#endif
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