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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_pe_sm.h"
#include "usb_prl_sm.h"
#include "usb_sm.h"
#include "usb_tc_sm.h"
#include "usbc_ppc.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_HOOK, format, ## args)
#define CPRINTS(format, args...) cprints(CC_HOOK, format, ## args)
#else /* CONFIG_COMMON_RUNTIME */
#define CPRINTF(format, args...)
#define CPRINTS(format, args...)
#endif
/* Type-C Layer Flags */
#define TC_FLAGS_VCONN_ON BIT(0)
#define TC_FLAGS_TS_DTS_PARTNER BIT(1)
#define TC_FLAGS_VBUS_NEVER_LOW BIT(2)
#define TC_FLAGS_LPM_TRANSITION BIT(3)
#define TC_FLAGS_LPM_ENGAGED BIT(4)
#define TC_FLAGS_LPM_REQUESTED BIT(5)
#define TC_FLAGS_CTVPD_DETECTED BIT(6)
#define TC_FLAGS_REQUEST_VC_SWAP_ON BIT(7)
#define TC_FLAGS_REQUEST_VC_SWAP_OFF BIT(8)
#define TC_FLAGS_REJECT_VCONN_SWAP BIT(9)
#define TC_FLAGS_REQUEST_PR_SWAP BIT(10)
#define TC_FLAGS_REQUEST_DR_SWAP BIT(11)
#define TC_FLAGS_POWER_OFF_SNK BIT(12)
#define TC_FLAGS_PARTNER_EXTPOWER BIT(13)
#define TC_FLAGS_PARTNER_DR_DATA BIT(14)
#define TC_FLAGS_PARTNER_DR_POWER BIT(15)
#define TC_FLAGS_PARTNER_PD_CAPABLE BIT(16)
#define TC_FLAGS_HARD_RESET BIT(17)
#define TC_FLAGS_PARTNER_USB_COMM BIT(18)
#define TC_FLAGS_PR_SWAP_IN_PROGRESS BIT(19)
#define TC_FLAGS_DO_PR_SWAP BIT(20)
#define TC_FLAGS_DISC_IDENT_IN_PROGRESS BIT(21)
enum ps_reset_sequence {
PS_STATE0,
PS_STATE1,
PS_STATE2,
PS_STATE3
};
/* List of all TypeC-level states */
enum usb_tc_state {
/* Normal States */
TC_DISABLED,
TC_ERROR_RECOVERY,
TC_UNATTACHED_SNK,
TC_ATTACH_WAIT_SNK,
TC_ATTACHED_SNK,
TC_UNORIENTED_DBG_ACC_SRC,
TC_DBG_ACC_SNK,
TC_UNATTACHED_SRC,
TC_ATTACH_WAIT_SRC,
TC_ATTACHED_SRC,
TC_TRY_SRC,
TC_TRY_WAIT_SNK,
#ifdef CONFIG_USB_PE_SM
TC_CT_UNATTACHED_SNK,
TC_CT_ATTACHED_SNK,
#endif
/* Super States */
TC_CC_OPEN,
TC_CC_RD,
TC_CC_RP,
TC_UNATTACHED,
};
/* Forward declare the full list of states. This is indexed by usb_tc_state */
static const struct usb_state tc_states[];
#ifdef CONFIG_COMMON_RUNTIME
/* 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_UNORIENTED_DBG_ACC_SRC] = "UnorientedDebugAccessory.SRC",
[TC_DBG_ACC_SNK] = "DebugAccessory.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",
};
#endif
/* Generate a compiler error if invalid states are referenced */
#ifndef CONFIG_USB_PD_TRY_SRC
extern int TC_TRY_SRC_UNDEFINED;
#define TC_TRY_SRC TC_TRY_SRC_UNDEFINED
extern int TC_TRY_WAIT_SNK_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 true. */
uint8_t pd_enable;
#ifdef CONFIG_USB_PE_SM
/* Power supply reset sequence during a hard reset */
enum ps_reset_sequence ps_reset_state;
#endif
/* Port polarity : 0 => CC1 is CC line, 1 => CC2 is CC line */
uint8_t polarity;
/* port flags, see TC_FLAGS_* */
uint32_t flags;
/* Role toggle timer */
uint64_t next_role_swap;
/* Generic timer */
uint64_t timeout;
/* Time to enter low power mode */
uint64_t low_power_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;
/* The last time the cc1 or cc2 line changed. */
uint64_t cc_last_change;
/* Current voltage on CC pins */
enum tcpc_cc_voltage_status cc1, cc2;
/* Interpreted PD state of above cc1 and cc2 lines */
enum pd_cc_states cc_state;
/* Type-C current */
typec_current_t typec_curr;
/* Type-C current change */
typec_current_t typec_curr_change;
/* Attached ChromeOS device id, RW hash, and current RO / RW image */
uint16_t dev_id;
uint32_t dev_rw_hash[PD_RW_HASH_SIZE/4];
enum ec_current_image current_image;
} tc[CONFIG_USB_PD_PORT_COUNT];
/* Port dual-role state */
static __maybe_unused
enum pd_dual_role_states drp_state[CONFIG_USB_PD_PORT_COUNT] = {
[0 ... (CONFIG_USB_PD_PORT_COUNT - 1)] =
CONFIG_USB_PD_INITIAL_DRP_STATE};
#ifdef CONFIG_USBC_VCONN
static void set_vconn(int port, int enable);
#endif
/* Forward declare common, private functions */
static void exit_low_power_mode(int port);
static void handle_device_access(int port);
static void handle_new_power_state(int port);
static int reset_device_and_notify(int port);
static void pd_update_dual_role_config(int port);
static int pd_device_in_low_power(int port);
static void pd_wait_for_wakeup(int port);
/* Tracker for which task is waiting on sysjump prep to finish */
static volatile task_id_t sysjump_task_waiting = TASK_ID_INVALID;
#ifdef CONFIG_USB_PE_SM
/*
* 4 entry rw_hash table of type-C devices that AP has firmware updates for.
*/
#ifdef CONFIG_COMMON_RUNTIME
#define RW_HASH_ENTRIES 4
static struct ec_params_usb_pd_rw_hash_entry rw_hash_table[RW_HASH_ENTRIES];
#endif
#endif /* CONFIG_USB_PE_SM */
/* 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);
/* Enable variable for Try.SRC states */
STATIC_IF(CONFIG_USB_PD_TRY_SRC) uint8_t pd_try_src_enable;
STATIC_IF(CONFIG_USB_PD_TRY_SRC) void pd_update_try_source(void);
static void sink_stop_drawing_current(int port);
/*
* 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 */
}
void pd_set_vbus_discharge(int port, int enable)
{
/* DO NOTHING */
}
uint16_t pd_get_identity_vid(int port)
{
/* DO NOTHING */
return 0;
}
#endif /* !CONFIG_USB_PRL_SM */
void pd_update_contract(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
/* Must be in Attached.SRC when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SRC)
pe_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);
/* Must be in Attached.SNK when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SNK)
pe_dpm_request(port, DPM_REQUEST_NEW_POWER_LEVEL);
else
TC_SET_FLAG(port, TC_FLAGS_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)
pe_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)
pe_dpm_request(port, DPM_REQUEST_NEW_POWER_LEVEL);
}
}
void pd_request_power_swap(int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
/*
* Must be in Attached.SRC or Attached.SNK when this function
* is called
*/
if (get_state_tc(port) == TC_ATTACHED_SRC ||
get_state_tc(port) == TC_ATTACHED_SNK) {
TC_SET_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS);
}
}
}
#ifdef CONFIG_USB_PE_SM
void pd_set_dual_role(int port, enum pd_dual_role_states state)
{
drp_state[port] = state;
if (IS_ENABLED(CONFIG_USB_PD_TRY_SRC))
pd_update_try_source();
}
int 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[port].pd_enable;
}
void pd_send_vdm(int port, uint32_t vid, int cmd, const uint32_t *data,
int count)
{
pe_send_vdm(port, vid, cmd, data, count);
}
void pd_request_data_swap(int port)
{
/*
* Must be in Attached.SRC or Attached.SNK when this function
* is called
*/
if (get_state_tc(port) == TC_ATTACHED_SRC ||
get_state_tc(port) == TC_ATTACHED_SNK) {
TC_SET_FLAG(port, TC_FLAGS_REQUEST_DR_SWAP);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
}
/*
* 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. */
int 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.
*/
int 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];
}
int pd_dev_store_rw_hash(int port, uint16_t dev_id, uint32_t *rw_hash,
uint32_t current_image)
{
int i;
tc[port].dev_id = dev_id;
memcpy(tc[port].dev_rw_hash, rw_hash, PD_RW_HASH_SIZE);
#ifdef CONFIG_CMD_PD_DEV_DUMP_INFO
if (debug_level >= 2)
pd_dev_dump_info(dev_id, (uint8_t *)rw_hash);
#endif
tc[port].current_image = current_image;
/* Search table for matching device / hash */
for (i = 0; i < RW_HASH_ENTRIES; i++)
if (dev_id == rw_hash_table[i].dev_id)
return !memcmp(rw_hash,
rw_hash_table[i].dev_rw_hash,
PD_RW_HASH_SIZE);
return 0;
}
void pd_got_frs_signal(int port)
{
pe_got_frs_signal(port);
}
int tc_is_attached_src(int port)
{
return get_state_tc(port) == TC_ATTACHED_SRC;
}
int tc_is_attached_snk(int port)
{
return get_state_tc(port) == TC_ATTACHED_SNK;
}
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_extpower(int port, int en)
{
if (en)
TC_SET_FLAG(port, TC_FLAGS_PARTNER_EXTPOWER);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_EXTPOWER);
}
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);
else
TC_CLR_FLAG(port, TC_FLAGS_PARTNER_PD_CAPABLE);
}
void tc_ctvpd_detected(int port)
{
TC_SET_FLAG(port, TC_FLAGS_CTVPD_DETECTED);
}
void tc_vconn_on(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)
{
TC_CLR_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS);
}
void tc_prs_src_snk_assert_rd(int port)
{
/* Must be in Attached.SRC when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SRC) {
/* Transition to Attached.SNK to assert Rd */
TC_SET_FLAG(port, TC_FLAGS_DO_PR_SWAP);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
}
void tc_prs_snk_src_assert_rp(int port)
{
/* Must be in Attached.SNK when this function is called */
if (get_state_tc(port) == TC_ATTACHED_SNK) {
/* Transition to Attached.SRC to assert Rp */
TC_SET_FLAG(port, TC_FLAGS_DO_PR_SWAP);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
}
void tc_hard_reset(int port)
{
TC_SET_FLAG(port, TC_FLAGS_HARD_RESET);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
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);
}
#endif /* CONFIG_USB_PE_SM */
void tc_snk_power_off(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SNK) {
TC_SET_FLAG(port, TC_FLAGS_POWER_OFF_SNK);
sink_stop_drawing_current(port);
}
}
int tc_src_power_on(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SRC)
return pd_set_power_supply_ready(port);
return 0;
}
void tc_src_power_off(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SRC) {
/* Remove VBUS */
pd_power_supply_reset(port);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_set_ceil(port, CEIL_REQUESTOR_PD,
CHARGE_CEIL_NONE);
}
}
void pd_set_suspend(int port, int enable)
{
if (pd_is_port_enabled(port) == !enable)
return;
set_state_tc(port,
enable ? TC_DISABLED : TC_UNATTACHED_SNK);
}
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;
}
int pd_get_polarity(int port)
{
return tc[port].polarity;
}
int pd_get_role(int port)
{
return tc[port].data_role;
}
int pd_is_vbus_present(int port)
{
if (IS_ENABLED(CONFIG_USB_PD_VBUS_DETECT_TCPC))
return tcpm_get_vbus_level(port);
else
return pd_snk_is_vbus_provided(port);
}
void pd_vbus_low(int port)
{
TC_CLR_FLAG(port, TC_FLAGS_VBUS_NEVER_LOW);
}
int pd_is_connected(int port)
{
return (get_state_tc(port) == TC_ATTACHED_SNK) ||
(get_state_tc(port) == TC_ATTACHED_SRC);
}
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
void pd_prepare_sysjump(void)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
int i;
/*
* Exit modes before sysjump so we can cleanly enter again
* later
*/
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
/*
* We can't be in an alternate mode if PD comm is
* disabled, so no need to send the event
*/
if (!pd_comm_is_enabled(i))
continue;
sysjump_task_waiting = task_get_current();
task_set_event(PD_PORT_TO_TASK_ID(i),
PD_EVENT_SYSJUMP, 0);
task_wait_event_mask(TASK_EVENT_SYSJUMP_READY, -1);
sysjump_task_waiting = TASK_ID_INVALID;
}
}
}
#endif
void tc_start_error_recovery(int port)
{
/*
* Async. function call:
* 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 = 0;
res = tc_restart_tcpc(port);
CPRINTS("TCPC p%d init %s", port, res ? "failed" : "ready");
/* 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);
tcpm_select_rp_value(port, CONFIG_USB_PD_PULLUP);
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);
}
tc[port].flags = 0;
#ifdef CONFIG_USB_PE_SM
tc[port].pd_enable = 0;
tc[port].ps_reset_state = PS_STATE0;
#endif
}
void tc_state_init(int port)
{
/* Unattached.SNK is the default starting state. */
restart_tc_sm(port, TC_UNATTACHED_SNK);
}
enum pd_power_role tc_get_power_role(int port)
{
return tc[port].power_role;
}
enum pd_data_role tc_get_data_role(int port)
{
return tc[port].data_role;
}
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;
}
uint8_t tc_get_polarity(int port)
{
return tc[port].polarity;
}
uint8_t tc_get_pd_enabled(int port)
{
return tc[port].pd_enable;
}
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)
{
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)
{
return tc[port].ctx.current - &tc_states[0];
}
static void print_current_state(const int port)
{
CPRINTS("C%d: %s", port, tc_state_names[get_state_tc(port)]);
}
/* This is only called from the PD tasks that owns the port. */
static void exit_low_power_mode(int port)
{
if (!IS_ENABLED(CONFIG_USB_PE_SM) &&
!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return;
if (TC_CHK_FLAG(port, TC_FLAGS_LPM_ENGAGED))
reset_device_and_notify(port);
else
TC_CLR_FLAG(port, TC_FLAGS_LPM_REQUESTED);
}
void tc_event_check(int port, int evt)
{
/* Update the cc variables if there was a change */
if (evt & PD_EVENT_CC) {
enum tcpc_cc_voltage_status cc1, cc2;
tcpm_get_cc(port, &cc1, &cc2);
if (cc1 != tc[port].cc1 || cc2 != tc[port].cc2) {
tc[port].cc_state = pd_get_cc_state(cc1, cc2);
tc[port].cc1 = cc1;
tc[port].cc2 = cc2;
tc[port].cc_last_change = get_time().val;
}
}
if (!IS_ENABLED(CONFIG_USB_PE_SM))
return;
if (IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER)) {
if (evt & PD_EXIT_LOW_POWER_EVENT_MASK)
exit_low_power_mode(port);
if (evt & PD_EVENT_DEVICE_ACCESSED)
handle_device_access(port);
}
if (IS_ENABLED(CONFIG_POWER_COMMON)) {
if (evt & PD_EVENT_POWER_STATE_CHANGE)
handle_new_power_state(port);
}
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
if (evt & PD_EVENT_SYSJUMP) {
pe_exit_dp_mode(port);
notify_sysjump_ready(&sysjump_task_waiting);
}
}
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);
/* 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
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
static void pd_update_try_source(void)
{
int i;
int try_src = 0;
int batt_soc = usb_get_battery_soc();
try_src = 0;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++)
try_src |= drp_state[i] == PD_DRP_TOGGLE_ON;
/*
* Enable try source when dual-role toggling AND battery is present
* and at some minimum percentage.
*/
pd_try_src_enable = try_src &&
batt_soc >= CONFIG_USB_PD_TRY_SRC_MIN_BATT_SOC;
#ifdef CONFIG_BATTERY_REVIVE_DISCONNECT
/*
* Don't attempt Try.Src if the battery is in the disconnect state. The
* discharge FET may not be enabled and so attempting Try.Src may cut
* off our only power source at the time.
*/
pd_try_src_enable &= (battery_get_disconnect_state() ==
BATTERY_NOT_DISCONNECTED);
#elif defined(CONFIG_BATTERY_PRESENT_CUSTOM) || \
defined(CONFIG_BATTERY_PRESENT_GPIO)
/*
* When battery is cutoff in ship mode it may not be reliable to
* check if battery is present with its state of charge.
* Also check if battery is initialized and ready to provide power.
*/
pd_try_src_enable &= (battery_is_present() == BP_YES);
#endif /* CONFIG_BATTERY_PRESENT_[CUSTOM|GPIO] */
}
DECLARE_HOOK(HOOK_BATTERY_SOC_CHANGE, pd_update_try_source, HOOK_PRIO_DEFAULT);
#endif /* CONFIG_USB_PD_TRY_SRC */
#ifdef CONFIG_CMD_PD_DEV_DUMP_INFO
static inline void pd_dev_dump_info(uint16_t dev_id, uint8_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; j += 4) {
ccprintf(" 0x%02x%02x%02x%02x", hash[j + 3], hash[j + 2],
hash[j + 1], hash[j]);
}
ccprintf("\n");
}
#endif /* CONFIG_CMD_PD_DEV_DUMP_INFO */
static void set_vconn(int port, int enable)
{
if (enable == TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
return;
if (enable)
TC_SET_FLAG(port, TC_FLAGS_VCONN_ON);
else
TC_CLR_FLAG(port, TC_FLAGS_VCONN_ON);
/*
* 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))
ppc_set_vconn(port, enable);
}
#ifdef CONFIG_USB_PD_TCPM_TCPCI
static uint32_t pd_ports_to_resume;
static void resume_pd_port(void)
{
uint32_t port;
uint32_t suspended_ports = atomic_read_clear(&pd_ports_to_resume);
while (suspended_ports) {
port = __builtin_ctz(suspended_ports);
suspended_ports &= ~(1 << port);
pd_set_suspend(port, 0);
}
}
DECLARE_DEFERRED(resume_pd_port);
void pd_deferred_resume(int port)
{
atomic_or(&pd_ports_to_resume, 1 << port);
hook_call_deferred(&resume_pd_port_data, SECOND);
}
#endif /* CONFIG_USB_PD_DEFERRED_RESUME */
/* This must only be called from the PD task */
static void pd_update_dual_role_config(int port)
{
/*
* 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).
*/
if (!IS_ENABLED(CONFIG_USB_PE_SM))
return;
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))) {
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);
}
}
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 negotiated DP mode again when it
* boots up
*/
pe_exit_dp_mode(port);
/* Ensure mux is set properly after chipset transition */
set_usb_mux_with_current_data_role(port);
}
}
#ifdef CONFIG_USB_PE_SM
/*
* HOST COMMANDS
*/
#ifdef HAS_TASK_HOSTCMD
static enum ec_status hc_pd_ports(struct host_cmd_handler_args *args)
{
struct ec_response_usb_pd_ports *r = args->response;
r->num_ports = CONFIG_USB_PD_PORT_COUNT;
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_PORTS,
hc_pd_ports,
EC_VER_MASK(0));
static const enum pd_dual_role_states dual_role_map[USB_PD_CTRL_ROLE_COUNT] = {
[USB_PD_CTRL_ROLE_TOGGLE_ON] = PD_DRP_TOGGLE_ON,
[USB_PD_CTRL_ROLE_TOGGLE_OFF] = PD_DRP_TOGGLE_OFF,
[USB_PD_CTRL_ROLE_FORCE_SINK] = PD_DRP_FORCE_SINK,
[USB_PD_CTRL_ROLE_FORCE_SOURCE] = PD_DRP_FORCE_SOURCE,
[USB_PD_CTRL_ROLE_FREEZE] = PD_DRP_FREEZE,
};
#ifdef CONFIG_USBC_SS_MUX
static const enum typec_mux typec_mux_map[USB_PD_CTRL_MUX_COUNT] = {
[USB_PD_CTRL_MUX_NONE] = TYPEC_MUX_NONE,
[USB_PD_CTRL_MUX_USB] = TYPEC_MUX_USB,
[USB_PD_CTRL_MUX_AUTO] = TYPEC_MUX_DP,
[USB_PD_CTRL_MUX_DP] = TYPEC_MUX_DP,
[USB_PD_CTRL_MUX_DOCK] = TYPEC_MUX_DOCK,
};
#endif
__overridable uint8_t board_get_dp_pin_mode(int port)
{
return 0;
}
/*
* TODO(b/142911453): Move this function to a common/usb_common.c to avoid
* duplicate code
*/
static enum ec_status hc_usb_pd_control(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_pd_control *p = args->params;
struct ec_response_usb_pd_control_v2 *r_v2 = args->response;
struct ec_response_usb_pd_control *r = args->response;
if (p->port >= CONFIG_USB_PD_PORT_COUNT)
return EC_RES_INVALID_PARAM;
if (p->role >= USB_PD_CTRL_ROLE_COUNT ||
p->mux >= USB_PD_CTRL_MUX_COUNT)
return EC_RES_INVALID_PARAM;
if (p->role != USB_PD_CTRL_ROLE_NO_CHANGE)
pd_set_dual_role(p->port, dual_role_map[p->role]);
#ifdef CONFIG_USBC_SS_MUX
if (p->mux != USB_PD_CTRL_MUX_NO_CHANGE)
usb_mux_set(p->port, typec_mux_map[p->mux],
typec_mux_map[p->mux] == TYPEC_MUX_NONE ?
USB_SWITCH_DISCONNECT :
USB_SWITCH_CONNECT,
pd_get_polarity(p->port));
#endif /* CONFIG_USBC_SS_MUX */
if (p->swap == USB_PD_CTRL_SWAP_DATA)
pd_request_data_swap(p->port);
else if (p->swap == USB_PD_CTRL_SWAP_POWER)
pd_request_power_swap(p->port);
#ifdef CONFIG_USBC_VCONN_SWAP
else if (p->swap == USB_PD_CTRL_SWAP_VCONN)
pe_dpm_request(p->port, DPM_REQUEST_VCONN_SWAP);
#endif
switch (args->version) {
case 0:
r->enabled = pd_comm_is_enabled(p->port);
r->role = tc[p->port].power_role;
r->polarity = tc[p->port].polarity;
r->state = get_state_tc(p->port);
args->response_size = sizeof(*r);
break;
case 1:
case 2:
if (sizeof(*r_v2) > args->response_max)
return EC_RES_INVALID_PARAM;
r_v2->enabled =
(pd_comm_is_enabled(p->port) ?
PD_CTRL_RESP_ENABLED_COMMS : 0) |
(pd_is_connected(p->port) ?
PD_CTRL_RESP_ENABLED_CONNECTED : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_PARTNER_PD_CAPABLE) ?
PD_CTRL_RESP_ENABLED_PD_CAPABLE : 0);
r_v2->role =
(tc[p->port].power_role ? PD_CTRL_RESP_ROLE_POWER : 0) |
(tc[p->port].data_role ? PD_CTRL_RESP_ROLE_DATA : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_VCONN_ON) ?
PD_CTRL_RESP_ROLE_VCONN : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_PARTNER_DR_POWER) ?
PD_CTRL_RESP_ROLE_DR_POWER : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_PARTNER_DR_DATA) ?
PD_CTRL_RESP_ROLE_DR_DATA : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_PARTNER_USB_COMM) ?
PD_CTRL_RESP_ROLE_USB_COMM : 0) |
(TC_CHK_FLAG(p->port, TC_FLAGS_PARTNER_EXTPOWER) ?
PD_CTRL_RESP_ROLE_EXT_POWERED : 0);
r_v2->polarity = tc[p->port].polarity;
r_v2->cc_state = tc[p->port].cc_state;
r_v2->dp_mode = board_get_dp_pin_mode(p->port);
r_v2->cable_type = get_usb_pd_mux_cable_type(p->port);
strzcpy(r_v2->state, tc_state_names[get_state_tc(p->port)],
sizeof(r_v2->state));
if (args->version == 1) {
/*
* ec_response_usb_pd_control_v2 (r_v2) is a
* strict superset of ec_response_usb_pd_control_v1
*/
args->response_size =
sizeof(struct ec_response_usb_pd_control_v1);
} else
args->response_size = sizeof(*r_v2);
break;
default:
return EC_RES_INVALID_PARAM;
}
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_CONTROL,
hc_usb_pd_control,
EC_VER_MASK(0) | EC_VER_MASK(1) | EC_VER_MASK(2));
static enum ec_status hc_remote_flash(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_pd_fw_update *p = args->params;
int port = p->port;
int rv = EC_RES_SUCCESS;
const uint32_t *data = &(p->size) + 1;
int i, size;
if (port >= CONFIG_USB_PD_PORT_COUNT)
return EC_RES_INVALID_PARAM;
if (p->size + sizeof(*p) > args->params_size)
return EC_RES_INVALID_PARAM;
#if defined(CONFIG_BATTERY_PRESENT_CUSTOM) || \
defined(CONFIG_BATTERY_PRESENT_GPIO)
/*
* Do not allow PD firmware update if no battery and this port
* is sinking power, because we will lose power.
*/
if (battery_is_present() != BP_YES &&
charge_manager_get_active_charge_port() == port)
return EC_RES_UNAVAILABLE;
#endif
switch (p->cmd) {
case USB_PD_FW_REBOOT:
pe_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_REBOOT, NULL, 0);
/*
* Return immediately to free pending i2c bus. Host needs to
* manage this delay.
*/
return EC_RES_SUCCESS;
case USB_PD_FW_FLASH_ERASE:
pe_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_FLASH_ERASE, NULL, 0);
/*
* Return immediately. Host needs to manage delays here which
* can be as long as 1.2 seconds on 64KB RW flash.
*/
return EC_RES_SUCCESS;
case USB_PD_FW_ERASE_SIG:
pe_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_ERASE_SIG, NULL, 0);
break;
case USB_PD_FW_FLASH_WRITE:
/* Data size must be a multiple of 4 */
if (!p->size || p->size % 4)
return EC_RES_INVALID_PARAM;
size = p->size / 4;
for (i = 0; i < size; i += VDO_MAX_SIZE - 1) {
pe_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_FLASH_WRITE,
data + i, MIN(size - i, VDO_MAX_SIZE - 1));
}
return EC_RES_SUCCESS;
default:
return EC_RES_INVALID_PARAM;
}
return rv;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_FW_UPDATE,
hc_remote_flash,
EC_VER_MASK(0));
static enum ec_status
hc_remote_rw_hash_entry(struct host_cmd_handler_args *args)
{
int i, idx = 0, found = 0;
const struct ec_params_usb_pd_rw_hash_entry *p = args->params;
static int rw_hash_next_idx;
if (!p->dev_id)
return EC_RES_INVALID_PARAM;
for (i = 0; i < RW_HASH_ENTRIES; i++) {
if (p->dev_id == rw_hash_table[i].dev_id) {
idx = i;
found = 1;
break;
}
}
if (!found) {
idx = rw_hash_next_idx;
rw_hash_next_idx = rw_hash_next_idx + 1;
if (rw_hash_next_idx == RW_HASH_ENTRIES)
rw_hash_next_idx = 0;
}
memcpy(&rw_hash_table[idx], p, sizeof(*p));
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_RW_HASH_ENTRY,
hc_remote_rw_hash_entry,
EC_VER_MASK(0));
static enum ec_status hc_remote_pd_dev_info(struct host_cmd_handler_args *args)
{
const uint8_t *port = args->params;
struct ec_params_usb_pd_rw_hash_entry *r = args->response;
if (*port >= CONFIG_USB_PD_PORT_COUNT)
return EC_RES_INVALID_PARAM;
r->dev_id = tc[*port].dev_id;
if (r->dev_id)
memcpy(r->dev_rw_hash, tc[*port].dev_rw_hash, PD_RW_HASH_SIZE);
r->current_image = tc[*port].current_image;
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_DEV_INFO,
hc_remote_pd_dev_info,
EC_VER_MASK(0));
#ifndef CONFIG_USB_PD_TCPC
#ifdef CONFIG_EC_CMD_PD_CHIP_INFO
static enum ec_status hc_remote_pd_chip_info(struct host_cmd_handler_args *args)
{
const struct ec_params_pd_chip_info *p = args->params;
struct ec_response_pd_chip_info_v1 *info;
if (p->port >= CONFIG_USB_PD_PORT_COUNT)
return EC_RES_INVALID_PARAM;
if (tcpm_get_chip_info(p->port, p->live, &info))
return EC_RES_ERROR;
/*
* Take advantage of the fact that v0 and v1 structs have the
* same layout for v0 data. (v1 just appends data)
*/
args->response_size =
args->version ? sizeof(struct ec_response_pd_chip_info_v1)
: sizeof(struct ec_response_pd_chip_info);
memcpy(args->response, info, args->response_size);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_PD_CHIP_INFO,
hc_remote_pd_chip_info,
EC_VER_MASK(0) | EC_VER_MASK(1));
#endif /* CONFIG_EC_CMD_PD_CHIP_INFO */
#endif /* !CONFIG_USB_PD_TCPC */
#ifdef CONFIG_HOSTCMD_EVENTS
void pd_notify_dp_alt_mode_entry(void)
{
/*
* Note: EC_HOST_EVENT_PD_MCU may be a more appropriate host event to
* send, but we do not send that here because there are other cases
* where we send EC_HOST_EVENT_PD_MCU such as charger insertion or
* removal. Currently, those do not wake the system up, but
* EC_HOST_EVENT_MODE_CHANGE does. If we made the system wake up on
* EC_HOST_EVENT_PD_MCU, we would be turning the internal display on on
* every charger insertion/removal, which is not desired.
*/
CPRINTS("Notifying AP of DP Alt Mode Entry...");
host_set_single_event(EC_HOST_EVENT_MODE_CHANGE);
}
#endif /* CONFIG_HOSTCMD_EVENTS */
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
static enum ec_status hc_remote_pd_set_amode(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_pd_set_mode_request *p = args->params;
if ((p->port >= CONFIG_USB_PD_PORT_COUNT) || (!p->svid) || (!p->opos))
return EC_RES_INVALID_PARAM;
switch (p->cmd) {
case PD_EXIT_MODE:
if (pd_dfp_exit_mode(p->port, p->svid, p->opos))
pd_send_vdm(p->port, p->svid,
CMD_EXIT_MODE | VDO_OPOS(p->opos), NULL, 0);
else {
CPRINTF("Failed exit mode\n");
return EC_RES_ERROR;
}
break;
case PD_ENTER_MODE:
if (pd_dfp_enter_mode(p->port, p->svid, p->opos))
pd_send_vdm(p->port, p->svid, CMD_ENTER_MODE |
VDO_OPOS(p->opos), NULL, 0);
break;
default:
return EC_RES_INVALID_PARAM;
}
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_SET_AMODE,
hc_remote_pd_set_amode,
EC_VER_MASK(0));
#endif /* CONFIG_USB_PD_ALT_MODE_DFP */
#endif /* HAS_TASK_HOSTCMD */
#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, 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
#endif /* CONFIG_USB_PE_SM */
#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));
}
}
#endif
#ifdef CONFIG_USBC_VCONN
int tc_is_vconn_src(int port)
{
if (get_state_tc(port) == TC_ATTACHED_SRC ||
get_state_tc(port) == TC_ATTACHED_SNK)
return TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON);
else
return -1;
}
#endif
#ifdef CONFIG_USBC_PPC
static void pd_send_hard_reset(int port)
{
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SEND_HARD_RESET, 0);
}
static uint32_t port_oc_reset_req;
static void re_enable_ports(void)
{
uint32_t ports = atomic_read_clear(&port_oc_reset_req);
while (ports) {
int port = __fls(ports);
ports &= ~BIT(port);
/*
* Let the board know that the overcurrent is
* over since we're going to attempt re-enabling
* the port.
*/
board_overcurrent_event(port, 0);
pd_send_hard_reset(port);
/*
* TODO(b/117854867): PD3.0 to send an alert message
* indicating OCP after explicit contract.
*/
}
}
DECLARE_DEFERRED(re_enable_ports);
void pd_handle_overcurrent(int port)
{
/* Keep track of the overcurrent events. */
CPRINTS("C%d: overcurrent!", port);
if (IS_ENABLED(CONFIG_USB_PD_LOGGING))
pd_log_event(PD_EVENT_PS_FAULT, PD_LOG_PORT_SIZE(port, 0),
PS_FAULT_OCP, NULL);
ppc_add_oc_event(port);
/* Let the board specific code know about the OC event. */
board_overcurrent_event(port, 1);
/* Wait 1s before trying to re-enable the port. */
atomic_or(&port_oc_reset_req, BIT(port));
hook_call_deferred(&re_enable_ports_data, SECOND);
}
#endif /* defined(CONFIG_USBC_PPC) */
/* 10 ms is enough time for any TCPC transaction to complete. */
#define PD_LPM_DEBOUNCE_US (10 * MSEC)
/* This is only called from the PD tasks that owns the port. */
static void handle_device_access(int port)
{
if (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return;
/* This should only be called from the PD task */
assert(port == TASK_ID_TO_PD_PORT(task_get_current()));
tc[port].low_power_time = get_time().val + PD_LPM_DEBOUNCE_US;
if (TC_CHK_FLAG(port, TC_FLAGS_LPM_ENGAGED)) {
CPRINTS("TCPC p%d Exit Low Power Mode", port);
TC_CLR_FLAG(port, TC_FLAGS_LPM_ENGAGED |
TC_FLAGS_LPM_REQUESTED);
/*
* Wake to ensure we make another pass through the main task
* loop after clearing the flags.
*/
task_wake(PD_PORT_TO_TASK_ID(port));
}
}
static int pd_device_in_low_power(int port)
{
if (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return 0;
/*
* If we are actively waking the device up in the PD task, do not
* let TCPC operation wait or retry because we are in low power mode.
*/
if (port == TASK_ID_TO_PD_PORT(task_get_current()) &&
TC_CHK_FLAG(port, TC_FLAGS_LPM_TRANSITION))
return 0;
return TC_CHK_FLAG(port, TC_FLAGS_LPM_ENGAGED);
}
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
static int reset_device_and_notify(int port)
{
int rv;
int task, waiting_tasks;
if (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return 0;
/* 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);
if (rv == EC_SUCCESS)
CPRINTS("TCPC p%d init ready", port);
else
CPRINTS("TCPC p%d 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.
*/
atomic_clear(task_get_event_bitmap(task_get_current()),
PD_EVENT_TCPC_RESET);
waiting_tasks = atomic_read_clear(&tc[port].tasks_waiting_on_reset);
/*
* Now that we are done waking up the device, handle device access
* manually because we ignored it while waking up device.
*/
handle_device_access(port);
/* Clear SW LPM state; the state machine will set it again if needed */
TC_CLR_FLAG(port, TC_FLAGS_LPM_REQUESTED);
/* 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;
}
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
static void pd_wait_for_wakeup(int port)
{
if (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return;
if (port == TASK_ID_TO_PD_PORT(task_get_current())) {
/* If we are in the PD task, we can directly reset */
reset_device_and_notify(port);
} else {
/* Otherwise, we need to wait for the TCPC reset to complete */
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);
}
}
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
void pd_wait_exit_low_power(int port)
{
if (pd_device_in_low_power(port))
pd_wait_for_wakeup(port);
}
/*
* TODO(b/137493121): Move this function to a separate file that's shared
* between the this and the original stack.
*/
/*
* 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 (!IS_ENABLED(CONFIG_USB_PD_TCPC_LOW_POWER))
return;
if (port == TASK_ID_TO_PD_PORT(task_get_current())) {
/* Ignore any access to device while it is waking up */
if (TC_CHK_FLAG(port, TC_FLAGS_LPM_TRANSITION))
return;
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)
atomic_or(&tc[port].tasks_preventing_lpm, current_task_mask);
else
atomic_clear(&tc[port].tasks_preventing_lpm, current_task_mask);
}
static void sink_power_sub_states(int port)
{
/* Debounce cc lines for at least Rp value change timer */
if (get_time().val < tc[port].cc_last_change + PD_T_RP_VALUE_CHANGE)
return;
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
tc[port].typec_curr = usb_get_typec_current_limit(
tc[port].polarity, tc[port].cc1, tc[port].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)
{
task_wait_event(-1);
}
static void tc_disabled_exit(const int port)
{
if (!IS_ENABLED(CONFIG_USB_PD_TCPC)) {
if (tc_restart_tcpc(port) != 0) {
CPRINTS("TCPC p%d restart failed!", port);
return;
}
}
CPRINTS("TCPC p%d 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 (tc[port].timeout > 0 && get_time().val > tc[port].timeout) {
tc[port].timeout = 0;
restart_tc_sm(port, TC_UNATTACHED_SRC);
}
}
/* Set the CC resistors to Rd and update the TCPC power role header */
static void set_rd(const int port)
{
/*
* Both CC1 and CC2 pins shall be independently terminated to
* ground through Rd. Reset last cc change time.
*/
tcpm_set_cc(port, TYPEC_CC_RD);
tc[port].cc_last_change = get_time().val;
/* 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);
}
/**
* Unattached.SNK
*
* Super State is Unattached state
*/
static void tc_unattached_snk_entry(const int port)
{
/* Set Rd since we are not in the Rd superstate */
set_rd(port);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_update_dualrole(port, CAP_UNKNOWN);
tc[port].next_role_swap = get_time().val + PD_T_DRP_SNK;
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
tc[port].flags = 0;
tc[port].pd_enable = 0;
}
}
static void tc_unattached_snk_run(const int port)
{
/*
* 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)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
tc_set_data_role(port, PD_ROLE_UFP);
/* Inform Policy Engine that hard reset is complete */
pe_ps_reset_complete(port);
}
}
/*
* 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 (tc[port].cc_state == PD_CC_DFP_DEBUG_ACC ||
tc[port].cc_state == PD_CC_DFP_ATTACHED)
/* Connection Detected */
set_state_tc(port, TC_ATTACH_WAIT_SNK);
else if (get_time().val > tc[port].next_role_swap)
/* DRP Toggle */
set_state_tc(port, TC_UNATTACHED_SRC);
}
/**
* 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);
}
static void tc_attach_wait_snk_run(const int port)
{
/*
* A DRP shall transition to Unattached.SNK when the state of both
* the CC1 and CC2 pins is SNK.Open for at least tPDDebounce.
*/
if (get_time().val > tc[port].cc_last_change + PD_T_PD_DEBOUNCE &&
tc[port].cc_state == PD_CC_NONE) {
if (IS_ENABLED(CONFIG_USB_PE_SM) &&
IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP))
pd_dfp_exit_mode(port, 0, 0);
/* We are detached */
set_state_tc(port, TC_UNATTACHED_SRC);
return;
}
/* Wait for CC debounce */
if (get_time().val < tc[port].cc_last_change + PD_T_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 (tc[port].cc_state == PD_CC_DFP_ATTACHED) {
if (IS_ENABLED(CONFIG_USB_PD_TRY_SRC) &&
pd_try_src_enable)
set_state_tc(port, TC_TRY_SRC);
else
set_state_tc(port, TC_ATTACHED_SNK);
} else {
/* cc_state is PD_CC_DFP_DEBUG_ACC */
TC_SET_FLAG(port, TC_FLAGS_TS_DTS_PARTNER);
set_state_tc(port, TC_DBG_ACC_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
*/
static void tc_attached_snk_entry(const int port)
{
print_current_state(port);
if (!TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
/* Get connector orientation */
tc[port].polarity = get_snk_polarity(
tc[port].cc1, tc[port].cc2);
set_polarity(port, tc[port].polarity);
/*
* Initial data role for sink is UFP
* This also sets the usb mux
*/
tc_set_data_role(port, PD_ROLE_UFP);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER)) {
tc[port].typec_curr =
usb_get_typec_current_limit(
tc[port].polarity, tc[port].cc1, tc[port].cc2);
typec_set_input_current_limit(
port, tc[port].typec_curr, TYPE_C_VOLTAGE);
charge_manager_update_dualrole(port, CAP_DEDICATED);
}
}
/* Enable PD */
if (IS_ENABLED(CONFIG_USB_PE_SM))
tc[port].pd_enable = 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)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
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.
*/
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
/*
* Inform policy engine that power supply
* reset is complete
*/
pe_ps_reset_complete(port);
}
/*
* 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_is_vbus_present(port)) {
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP))
pd_dfp_exit_mode(port, 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[port].pd_enable && prl_is_running(port)) {
/*
* Power Role Swap
*/
if (TC_CHK_FLAG(port, TC_FLAGS_DO_PR_SWAP)) {
/* Clear PR_SWAP flag in exit */
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
*/
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 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_is_vbus_present(port)) {
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 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) &&
!TC_CHK_FLAG(port, TC_FLAGS_DO_PR_SWAP))
set_vconn(port, 0);
/* Clear flags after checking Vconn status */
TC_CLR_FLAG(port, TC_FLAGS_DO_PR_SWAP | TC_FLAGS_POWER_OFF_SNK);
/* Stop drawing power */
sink_stop_drawing_current(port);
}
/**
* UnorientedDebugAccessory.SRC
*
* Super State Entry Actions:
* Vconn Off
* Place Rp on CC
* Set power role to SOURCE
*/
static void tc_unoriented_dbg_acc_src_entry(const int port)
{
print_current_state(port);
/* Enable VBUS */
pd_set_power_supply_ready(port);
/* Any board specific unoriented debug setup should be added below */
}
static void tc_unoriented_dbg_acc_src_run(const int port)
{
/*
* A DRP, the port shall transition to Unattached.SNK when the
* SRC.Open state is detected on either the CC1 or CC2 pin.
*/
if (tc[port].cc1 == TYPEC_CC_VOLT_OPEN ||
tc[port].cc2 == TYPEC_CC_VOLT_OPEN) {
/* Remove VBUS */
pd_power_supply_reset(port);
if (IS_ENABLED(CONFIG_CHARGE_MANAGER))
charge_manager_set_ceil(port, CEIL_REQUESTOR_PD,
CHARGE_CEIL_NONE);
set_state_tc(port, TC_UNATTACHED_SNK);
}
}
/**
* Debug Accessory.SNK
*
* Super State Entry Actions:
* Vconn Off
* Place Rd on CC
* Set power role to SINK
*/
static void tc_dbg_acc_snk_entry(const int port)
{
print_current_state(port);
/*
* TODO(b/137759869): Board specific debug accessory setup should
* be add here.
*/
}
static void tc_dbg_acc_snk_run(const int port)
{
if (!pd_is_vbus_present(port)) {
if (IS_ENABLED(CONFIG_USB_PE_SM) &&
IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP)) {
pd_dfp_exit_mode(port, 0, 0);
}
set_state_tc(port, TC_UNATTACHED_SNK);
}
}
/* Set the CC resistors to Rp and update the TCPC power role header */
static void set_rp(const int port)
{
/*
* Both CC1 and CC2 pins shall be independently pulled
* up through Rp. Reset last cc change time.
*/
tcpm_select_rp_value(port, CONFIG_USB_PD_PULLUP);
tcpm_set_cc(port, TYPEC_CC_RP);
tc[port].cc_last_change = get_time().val;
/* 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);
}
/**
* Unattached.SRC
*
* Super State is Unattached state
*/
static void tc_unattached_src_entry(const int port)
{
/* Set Rd since we are not in the Rd superstate */
set_rp(port);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/* There is no sink connected. */
ppc_sink_is_connected(port, 0);
/*
* 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)) {
tc[port].flags = 0;
tc[port].pd_enable = 0;
}
tc[port].next_role_swap = get_time().val + PD_T_DRP_SRC;
}
static void tc_unattached_src_run(const int port)
{
if (IS_ENABLED(CONFIG_USB_PE_SM)) {
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
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;
}
/*
* Transition to AttachWait.SRC when VBUS is vSafe0V and:
* 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(tc[port].cc1, tc[port].cc2) ||
cc_is_audio_acc(tc[port].cc1, tc[port].cc2))
set_state_tc(port, TC_ATTACH_WAIT_SRC);
else if (get_time().val > tc[port].next_role_swap)
set_state_tc(port, TC_UNATTACHED_SNK);
}
/**
* 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);
}
static void tc_attach_wait_src_run(const int port)
{
/* Immediate transition without debounce if we detect Vopen */
if (tc[port].cc_state == PD_CC_NONE) {
set_state_tc(port, TC_UNATTACHED_SNK);
return;
}
/* Wait for CC debounce */
if (get_time().val < tc[port].cc_last_change + PD_T_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_is_vbus_present(port)) {
if (tc[port].cc_state == PD_CC_UFP_ATTACHED)
set_state_tc(port, TC_ATTACHED_SRC);
else if (tc[port].cc_state == PD_CC_UFP_DEBUG_ACC)
set_state_tc(port, TC_UNORIENTED_DBG_ACC_SRC);
}
}
/**
* Attached.SRC
*/
static void tc_attached_src_entry(const int port)
{
print_current_state(port);
/* Run function relies on timeout being 0 or meaningful */
tc[port].timeout = 0;
if (TC_CHK_FLAG(port, TC_FLAGS_PR_SWAP_IN_PROGRESS)) {
/* Enable VBUS */
pd_set_power_supply_ready(port);
/*
* Maintain VCONN supply state, whether ON or OFF, and its
* data role / usb mux connections.
*/
} else {
/*
* Start sourcing Vconn before Vbus to ensure
* we are within USB Type-C Spec 1.4 tVconnON
*/
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 1);
/* Enable VBUS */
if (pd_set_power_supply_ready(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, TYPEC_MUX_NONE,
USB_SWITCH_DISCONNECT, tc[port].polarity);
}
tc[port].polarity = (tc[port].cc1 != TYPEC_CC_VOLT_RD);
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);
tc[port].pd_enable = 0;
tc[port].timeout = get_time().val +
MAX(PD_POWER_SUPPLY_TURN_ON_DELAY, PD_T_VCONN_STABLE);
}
/* Inform PPC that a sink is connected. */
if (IS_ENABLED(CONFIG_USBC_PPC))
ppc_sink_is_connected(port, 1);
}
static void tc_attached_src_run(const int port)
{
#ifdef CONFIG_USB_PE_SM
/* Enable PD communications after power supply has fully turned on */
if (tc[port].pd_enable == 0 && get_time().val > tc[port].timeout) {
tc[port].pd_enable = 1;
tc[port].timeout = 0;
}
if (tc[port].pd_enable == 0)
return;
/*
* Handle Hard Reset from Policy Engine
*/
if (TC_CHK_FLAG(port, TC_FLAGS_HARD_RESET)) {
if (get_time().val < tc[port].timeout)
return;
switch (tc[port].ps_reset_state) {
case PS_STATE0:
/* Remove VBUS */
tc_src_power_off(port);
/* Set role to DFP */
tc_set_data_role(port, PD_ROLE_DFP);
/* Turn off VCONN */
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
/* Remove Rp */
tcpm_set_cc(port, TYPEC_CC_OPEN);
tc[port].ps_reset_state = PS_STATE1;
tc[port].timeout = get_time().val + PD_T_SRC_RECOVER;
return;
case PS_STATE1:
/* Turn VCONN on before Vbus to meet tVconnON */
if (IS_ENABLED(CONFIG_USBC_VCONN))
set_vconn(port, 1);
tc[port].ps_reset_state = PS_STATE2;
return;
case PS_STATE2:
/* Enable VBUS */
pd_set_power_supply_ready(port);
/* Apply Rp */
tcpm_set_cc(port, TYPEC_CC_RP);
tc[port].ps_reset_state = PS_STATE3;
tc[port].timeout = get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY;
return;
case PS_STATE3:
/* Tell Policy Engine Hard Reset is complete */
pe_ps_reset_complete(port);
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
tc[port].ps_reset_state = PS_STATE0;
return;
}
}
#endif
/*
* 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)) {
if (IS_ENABLED(CONFIG_USB_PE_SM))
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP))
pd_dfp_exit_mode(port, 0, 0);
tc[port].pd_enable = 0;
set_state_tc(port, IS_ENABLED(CONFIG_USB_PD_TRY_SRC) ?
TC_TRY_WAIT_SNK : TC_UNATTACHED_SNK);
return;
}
#ifdef CONFIG_USB_PE_SM
/*
* PD swap commands
*/
if (tc[port].pd_enable && prl_is_running(port)) {
/*
* Power Role Swap Request
*/
if (TC_CHK_FLAG(port, TC_FLAGS_DO_PR_SWAP)) {
/* Clear PR_SWAP flag in exit */
set_state_tc(port, TC_ATTACHED_SNK);
return;
}
/*
* 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);
}
if (IS_ENABLED(CONFIG_USBC_VCONN)) {
/*
* 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_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);
/* Disable VCONN if not power role swapping */
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON) &&
!TC_CHK_FLAG(port, TC_FLAGS_DO_PR_SWAP))
set_vconn(port, 0);
/* Clear PR swap flag after checking for Vconn */
TC_CLR_FLAG(port, TC_FLAGS_DO_PR_SWAP);
}
/**
* 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].timeout = get_time().val + PD_T_TRY_TIMEOUT;
}
static void tc_try_src_run(const int port)
{
const uint64_t now = get_time().val;
/*
* 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 (now > tc[port].cc_last_change + PD_T_TRY_CC_DEBOUNCE &&
tc[port].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.
*/
else if (now > tc[port].cc_last_change + PD_T_DRP_TRY &&
!pd_is_vbus_present(port))
set_state_tc(port, TC_TRY_WAIT_SNK);
else if (now > 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);
}
static void tc_try_wait_snk_run(const int port)
{
const uint64_t now = get_time().val;
/*
* The port shall transition to Attached.SNK after tCCDebounce if or
* when VBUS is detected.
*/
if (now > tc[port].cc_last_change + PD_T_CC_DEBOUNCE &&
pd_is_vbus_present(port))
set_state_tc(port, TC_ATTACHED_SNK);
/*
* 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.
*/
else if (now > tc[port].cc_last_change + PD_T_PD_DEBOUNCE &&
tc[port].cc_state == PD_CC_NONE)
set_state_tc(port, TC_UNATTACHED_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. Reset last cc change time.
*/
tcpm_select_rp_value(port, CONFIG_USB_PD_PULLUP);
tcpm_set_cc(port, TYPEC_CC_RD);
tc[port].cc_last_change = get_time().val;
/* 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[port].pd_enable = 0;
tc[port].timeout = get_time().val + PD_POWER_SUPPLY_TURN_ON_DELAY;
}
static void tc_ct_unattached_snk_run(int port)
{
if (tc[port].timeout > 0 && get_time().val > tc[port].timeout) {
tc[port].pd_enable = 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)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
/* Nothing to do. Just signal hard reset completion */
pe_ps_reset_complete(port);
}
/*
* 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);
/*
* The port shall transition to Unattached.SNK if the state of
* the CC pin is SNK.Open for tVPDDetach after VBUS is vSafe0V.
*/
} else if (get_time().val > tc[port].cc_last_change + PD_T_VPDDETACH &&
tc[port].cc_state == PD_CC_NONE) {
if (IS_ENABLED(CONFIG_USB_PD_ALT_MODE_DFP))
pd_dfp_exit_mode(port, 0, 0);
set_state_tc(port, TC_UNATTACHED_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)) {
TC_CLR_FLAG(port, TC_FLAGS_HARD_RESET);
/* 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_is_vbus_present(port)) {
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_OPEN
*/
static void tc_cc_open_entry(const int port)
{
/* Disable VBUS */
pd_power_supply_reset(port);
/* Disable VCONN */
if (TC_CHK_FLAG(port, TC_FLAGS_VCONN_ON))
set_vconn(port, 0);
/* Remove terminations from CC */
tcpm_set_cc(port, TYPEC_CC_OPEN);
if (IS_ENABLED(CONFIG_USBC_PPC)) {
/* There is no sink connected. */
ppc_sink_is_connected(port, 0);
/*
* Clear the overcurrent event counter
* since we've detected a disconnect.
*/
ppc_clear_oc_event_counter(port);
}
}
/**
* Super State CC_RD
*/
static void tc_cc_rd_entry(const int port)
{
set_rd(port);
}
/**
* Super State CC_RP
*/
static void tc_cc_rp_entry(const int port)
{
set_rp(port);
}
/**
* Super State Unattached
*
* Ensures that any time we unattached we can perform an action without
* repeating it during DRP toggle
*/
static void tc_unattached_entry(const int port)
{
/* This only prints the first time we enter a unattached state */
print_current_state(port);
/* This disables the mux when we disconnect on a port */
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
set_usb_mux_with_current_data_role(port);
}
void tc_run(const int port)
{
run_state(port, &tc[port].ctx);
}
/**
* This function checks the current CC status of the port partner
* and returns true if the attached partner is UFP.
*/
int pd_partner_is_ufp(int port)
{
return tc[port].cc_state == PD_CC_UFP_ATTACHED ||
tc[port].cc_state == PD_CC_UFP_DEBUG_ACC ||
tc[port].cc_state == PD_CC_UFP_AUDIO_ACC;
}
int pd_is_debug_acc(int port)
{
return tc[port].cc_state == PD_CC_UFP_DEBUG_ACC ||
tc[port].cc_state == PD_CC_DFP_DEBUG_ACC;
}
/*
* Type-C State Hierarchy (Sub-States are listed inside the boxes)
*
* |TC_UNATTACHED ---------|
* | |
* | TC_UNATTACHED_SNK |
* | TC_UNATTACHED_SRC |
* |-----------------------|
*
* |TC_CC_RD --------------| |TC_CC_RP ------------------------|
* | | | |
* | TC_ATTACH_WAIT_SNK | | TC_ATTACH_WAIT_SRC |
* | TC_TRY_WAIT_SNK | | TC_TRY_SRC |
* | TC_DBG_ACC_SNK | | TC_UNORIENTED_DBG_ACC_SRC |
* | TC_ATTACHED_SNK | | TC_ATTACHED_SRC |
* |-----------------------| |---------------------------------|
*
* |TC_CC_OPEN -----------|
* | |
* | TC_DISABLED |
* | TC_ERROR_RECOVERY |
* |----------------------|
*
*/
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,
},
[TC_UNATTACHED] = {
.entry = tc_unattached_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_UNATTACHED],
},
[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,
.parent = &tc_states[TC_CC_RD],
},
[TC_UNORIENTED_DBG_ACC_SRC] = {
.entry = tc_unoriented_dbg_acc_src_entry,
.run = tc_unoriented_dbg_acc_src_run,
.parent = &tc_states[TC_CC_RP],
},
[TC_DBG_ACC_SNK] = {
.entry = tc_dbg_acc_snk_entry,
.run = tc_dbg_acc_snk_run,
.parent = &tc_states[TC_CC_RD],
},
[TC_UNATTACHED_SRC] = {
.entry = tc_unattached_src_entry,
.run = tc_unattached_src_run,
.parent = &tc_states[TC_UNATTACHED],
},
[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,
.parent = &tc_states[TC_CC_RP],
},
#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_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
};
#ifdef TEST_BUILD
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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