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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 "battery.h"
#include "battery_smart.h"
#include "board.h"
#include "charge_manager.h"
#include "charge_state.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "ec_commands.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "registers.h"
#include "system.h"
#include "task.h"
#include "timer.h"
#include "tcpm.h"
#include "util.h"
#include "usb_charge.h"
#include "usb_mux.h"
#include "usb_pd.h"
#include "usb_pe_sm.h"
#include "usb_prl_sm.h"
#include "usb_tc_sm.h"
#include "usb_emsg.h"
#include "usb_sm.h"
#include "vpd_api.h"
#include "version.h"
/* Protocol Layer Flags */
#define PRL_FLAGS_TX_COMPLETE BIT(0)
#define PRL_FLAGS_START_AMS BIT(1)
#define PRL_FLAGS_END_AMS BIT(2)
#define PRL_FLAGS_TX_ERROR BIT(3)
#define PRL_FLAGS_PE_HARD_RESET BIT(4)
#define PRL_FLAGS_HARD_RESET_COMPLETE BIT(5)
#define PRL_FLAGS_PORT_PARTNER_HARD_RESET BIT(6)
#define PRL_FLAGS_MSG_XMIT BIT(7)
#define PRL_FLAGS_MSG_RECEIVED BIT(8)
#define PRL_FLAGS_ABORT BIT(9)
#define PRL_FLAGS_CHUNKING BIT(10)
/* PD counter definitions */
#define PD_MESSAGE_ID_COUNT 7
#define RCH_OBJ(port) (SM_OBJ(rch[port]))
#define TCH_OBJ(port) (SM_OBJ(tch[port]))
#define PRL_TX_OBJ(port) (SM_OBJ(prl_tx[port]))
#define PRL_HR_OBJ(port) (SM_OBJ(prl_hr[port]))
#define RCH_TEST_OBJ(port) (SM_OBJ(rch[(port)].obj))
#define TCH_TEST_OBJ(port) (SM_OBJ(tch[(port)].obj))
#define PRL_TX_TEST_OBJ(port) (SM_OBJ(prl_tx[(port)].obj))
#define PRL_HR_TEST_OBJ(port) (SM_OBJ(prl_hr[(port)].obj))
static enum sm_local_state local_state[CONFIG_USB_PD_PORT_COUNT] = {SM_INIT};
/* Chunked Rx State Machine Object */
static struct rx_chunked {
/* struct sm_obj must be first. */
struct sm_obj obj;
/* state id */
enum rch_state_id state_id;
/* PRL_FLAGS */
uint32_t flags;
/* protocol timer */
uint64_t chunk_sender_response_timer;
} rch[CONFIG_USB_PD_PORT_COUNT];
/* Chunked Tx State Machine Object */
static struct tx_chunked {
/* struct sm_obj must be first. */
struct sm_obj obj;
/* state id */
enum tch_state_id state_id;
/* state machine flags */
uint32_t flags;
/* protocol timer */
uint64_t chunk_sender_request_timer;
} tch[CONFIG_USB_PD_PORT_COUNT];
/* Message Reception State Machine Object */
static struct protocol_layer_rx {
/* message ids for all valid port partners */
int msg_id[NUM_XMIT_TYPES];
} prl_rx[CONFIG_USB_PD_PORT_COUNT];
/* Message Transmission State Machine Object */
static struct protocol_layer_tx {
/* struct sm_obj must be first. */
struct sm_obj obj;
/* state id */
enum prl_tx_state_id state_id;
/* state machine flags */
uint32_t flags;
/* protocol timer */
uint64_t sink_tx_timer;
/* tcpc transmit timeout */
uint64_t tcpc_tx_timeout;
/* Last SOP* we transmitted to */
uint8_t sop;
/* message id counters for all 6 port partners */
uint32_t msg_id_counter[NUM_XMIT_TYPES];
/* message retry counter */
uint32_t retry_counter;
/* transmit status */
int xmit_status;
} prl_tx[CONFIG_USB_PD_PORT_COUNT];
/* Hard Reset State Machine Object */
static struct protocol_hard_reset {
/* struct sm_obj must be first. */
struct sm_obj obj;
/* state id */
enum prl_hr_state_id state_id;
/* state machine flags */
uint32_t flags;
/* protocol timer */
uint64_t hard_reset_complete_timer;
} prl_hr[CONFIG_USB_PD_PORT_COUNT];
/* Chunking Message Object */
static struct pd_message {
/* message status flags */
uint32_t status_flags;
/* SOP* */
enum tcpm_transmit_type xmit_type;
/* type of message */
uint8_t msg_type;
/* extended message */
uint8_t ext;
/* PD revision */
enum pd_rev_type rev;
/* Number of 32-bit objects in chk_buf */
uint16_t data_objs;
/* temp chunk buffer */
uint32_t chk_buf[7];
uint32_t chunk_number_expected;
uint32_t num_bytes_received;
uint32_t chunk_number_to_send;
uint32_t send_offset;
} pdmsg[CONFIG_USB_PD_PORT_COUNT];
struct extended_msg emsg[CONFIG_USB_PD_PORT_COUNT];
/* Protocol Layer States */
/* Common Protocol Layer Message Transmission */
static void prl_tx_construct_message(int port);
DECLARE_STATE(prl, tx_phy_layer_reset, NOOP_EXIT);
DECLARE_STATE(prl, tx_wait_for_message_request, NOOP_EXIT);
DECLARE_STATE(prl, tx_layer_reset_for_transmit, NOOP_EXIT);
DECLARE_STATE(prl, tx_wait_for_phy_response, WITH_EXIT);
DECLARE_STATE(prl, tx_src_source_tx, NOOP_EXIT);
DECLARE_STATE(prl, tx_snk_start_ams, NOOP_EXIT);
/* Source Protocol Layser Message Transmission */
DECLARE_STATE(prl, tx_src_pending, NOOP_EXIT);
/* Sink Protocol Layer Message Transmission */
DECLARE_STATE(prl, tx_snk_pending, NOOP_EXIT);
DECLARE_STATE(prl, tx_discard_message, NOOP_EXIT);
/* Protocol Layer Message Reception */
static unsigned int prl_rx_wait_for_phy_message(int port, int evt);
/* Hard Reset Operation */
DECLARE_STATE(prl, hr_wait_for_request, NOOP_EXIT);
DECLARE_STATE(prl, hr_reset_layer, NOOP_EXIT);
DECLARE_STATE(prl, hr_wait_for_phy_hard_reset_complete, NOOP_EXIT);
DECLARE_STATE(prl, hr_wait_for_pe_hard_reset_complete, WITH_EXIT);
/* Chunked Rx */
DECLARE_STATE(rch, wait_for_message_from_protocol_layer, NOOP_EXIT);
DECLARE_STATE(rch, processing_extended_message, NOOP_EXIT);
DECLARE_STATE(rch, requesting_chunk, NOOP_EXIT);
DECLARE_STATE(rch, waiting_chunk, NOOP_EXIT);
DECLARE_STATE(rch, report_error, NOOP_EXIT);
/* Chunked Tx */
DECLARE_STATE(tch, wait_for_message_request_from_pe, NOOP_EXIT);
DECLARE_STATE(tch, wait_for_transmission_complete, NOOP_EXIT);
DECLARE_STATE(tch, construct_chunked_message, NOOP_EXIT);
DECLARE_STATE(tch, sending_chunked_message, NOOP_EXIT);
DECLARE_STATE(tch, wait_chunk_request, NOOP_EXIT);
DECLARE_STATE(tch, message_received, NOOP_EXIT);
void pd_transmit_complete(int port, int status)
{
prl_tx[port].xmit_status = status;
}
void pd_execute_hard_reset(int port)
{
/* Only allow async. function calls when state machine is running */
if (local_state[port] != SM_RUN)
return;
prl_hr[port].flags |= PRL_FLAGS_PORT_PARTNER_HARD_RESET;
set_state(port, PRL_HR_OBJ(port), prl_hr_reset_layer);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_execute_hard_reset(int port)
{
/* Only allow async. function calls when state machine is running */
if (local_state[port] != SM_RUN)
return;
prl_hr[port].flags |= PRL_FLAGS_PE_HARD_RESET;
set_state(port, PRL_HR_OBJ(port), prl_hr_reset_layer);
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_init(int port)
{
int i;
prl_tx[port].flags = 0;
prl_tx[port].xmit_status = TCPC_TX_UNSET;
tch[port].flags = 0;
rch[port].flags = 0;
/*
* Initialize to highest revision supported. If the port partner
* doesn't support this revision, the Protocol Engine will lower
* this value to the revision supported by the port partner.
*/
pdmsg[port].rev = PD_REV30;
pdmsg[port].status_flags = 0;
prl_hr[port].flags = 0;
for (i = 0; i < NUM_XMIT_TYPES; i++) {
prl_rx[port].msg_id[i] = -1;
prl_tx[port].msg_id_counter[i] = 0;
}
init_state(port, PRL_TX_OBJ(port), prl_tx_phy_layer_reset);
init_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
init_state(port, TCH_OBJ(port), tch_wait_for_message_request_from_pe);
init_state(port, PRL_HR_OBJ(port), prl_hr_wait_for_request);
}
enum rch_state_id get_rch_state_id(int port)
{
return rch[port].state_id;
}
enum tch_state_id get_tch_state_id(int port)
{
return tch[port].state_id;
}
enum prl_tx_state_id get_prl_tx_state_id(int port)
{
return prl_tx[port].state_id;
}
enum prl_hr_state_id get_prl_hr_state_id(int port)
{
return prl_hr[port].state_id;
}
void prl_start_ams(int port)
{
prl_tx[port].flags |= PRL_FLAGS_START_AMS;
}
void prl_end_ams(int port)
{
prl_tx[port].flags |= PRL_FLAGS_END_AMS;
}
void prl_hard_reset_complete(int port)
{
prl_hr[port].flags |= PRL_FLAGS_HARD_RESET_COMPLETE;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_send_ctrl_msg(int port,
enum tcpm_transmit_type type,
enum pd_ctrl_msg_type msg)
{
pdmsg[port].xmit_type = type;
pdmsg[port].msg_type = msg;
pdmsg[port].ext = 0;
emsg[port].len = 0;
tch[port].flags |= PRL_FLAGS_MSG_XMIT;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_send_data_msg(int port,
enum tcpm_transmit_type type,
enum pd_data_msg_type msg)
{
pdmsg[port].xmit_type = type;
pdmsg[port].msg_type = msg;
pdmsg[port].ext = 0;
tch[port].flags |= PRL_FLAGS_MSG_XMIT;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_send_ext_data_msg(int port,
enum tcpm_transmit_type type,
enum pd_ext_msg_type msg)
{
pdmsg[port].xmit_type = type;
pdmsg[port].msg_type = msg;
pdmsg[port].ext = 1;
tch[port].flags |= PRL_FLAGS_MSG_XMIT;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
}
void prl_reset(int port)
{
local_state[port] = SM_INIT;
}
void protocol_layer(int port, int evt, int en)
{
switch (local_state[port]) {
case SM_INIT:
prl_init(port);
local_state[port] = SM_RUN;
/* fall through */
case SM_RUN:
/* If disabling, wait until message is sent. */
if (!en && tch[port].state_id ==
TCH_WAIT_FOR_MESSAGE_REQUEST_FROM_PE) {
/* Disable RX */
#if defined(CONFIG_USB_TYPEC_CTVPD) || defined(CONFIG_USB_TYPEC_VPD)
vpd_rx_enable(0);
#else
tcpm_set_rx_enable(port, 0);
#endif
local_state[port] = SM_PAUSED;
break;
}
/* Run Protocol Layer Message Reception */
prl_rx_wait_for_phy_message(port, evt);
/* Run RX Chunked state machine */
exe_state(port, RCH_OBJ(port), RUN_SIG);
/* Run TX Chunked state machine */
exe_state(port, TCH_OBJ(port), RUN_SIG);
/* Run Protocol Layer Message Transmission state machine */
exe_state(port, PRL_TX_OBJ(port), RUN_SIG);
/* Run Protocol Layer Hard Reset state machine */
exe_state(port, PRL_HR_OBJ(port), RUN_SIG);
break;
case SM_PAUSED:
if (en)
local_state[port] = SM_INIT;
break;
}
}
enum sm_local_state prl_get_local_state(int port)
{
return local_state[port];
}
void prl_set_rev(int port, enum pd_rev_type rev)
{
pdmsg[port].rev = rev;
}
enum pd_rev_type prl_get_rev(int port)
{
return pdmsg[port].rev;
}
/* Common Protocol Layer Message Transmission */
static unsigned int prl_tx_phy_layer_reset(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_phy_layer_reset_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_phy_layer_reset_entry(int port)
{
prl_tx[port].state_id = PRL_TX_PHY_LAYER_RESET;
#if defined(CONFIG_USB_TYPEC_CTVPD) || defined(CONFIG_USB_TYPEC_VPD)
vpd_rx_enable(1);
#else
tcpm_init(port);
tcpm_set_rx_enable(port, 1);
#endif
return 0;
}
static unsigned int prl_tx_phy_layer_reset_run(int port)
{
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_message_request);
return 0;
}
static unsigned int prl_tx_wait_for_message_request(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_wait_for_message_request_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_wait_for_message_request_entry(int port)
{
prl_tx[port].state_id = PRL_TX_WAIT_FOR_MESSAGE_REQUEST;
/* Reset RetryCounter */
prl_tx[port].retry_counter = 0;
return 0;
}
static unsigned int prl_tx_wait_for_message_request_run(int port)
{
if (prl_tx[port].flags & PRL_FLAGS_MSG_XMIT) {
prl_tx[port].flags &= ~PRL_FLAGS_MSG_XMIT;
/*
* Soft Reset Message Message pending
*/
if ((pdmsg[port].msg_type == PD_CTRL_SOFT_RESET) &&
(emsg[port].len == 0)) {
set_state(port, PRL_TX_OBJ(port),
prl_tx_layer_reset_for_transmit);
}
/*
* Message pending (except Soft Reset)
*/
else {
/* NOTE: PRL_TX_Construct_Message State embedded here */
prl_tx_construct_message(port);
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_phy_response);
}
return 0;
} else if ((pdmsg[port].rev == PD_REV30) &&
(prl_tx[port].flags &
(PRL_FLAGS_START_AMS | PRL_FLAGS_END_AMS))) {
if (tc_get_power_role(port) == PD_ROLE_SOURCE) {
/*
* Start of AMS notification received from
* Policy Engine
*/
if (prl_tx[port].flags & PRL_FLAGS_START_AMS) {
prl_tx[port].flags &= ~PRL_FLAGS_START_AMS;
set_state(port, PRL_TX_OBJ(port),
prl_tx_src_source_tx);
return 0;
}
/*
* End of AMS notification received from
* Policy Engine
*/
else if (prl_tx[port].flags & PRL_FLAGS_END_AMS) {
prl_tx[port].flags &= ~PRL_FLAGS_END_AMS;
/* Set Rp = SinkTxOk */
tcpm_select_rp_value(port, SINK_TX_OK);
tcpm_set_cc(port, TYPEC_CC_RP);
prl_tx[port].retry_counter = 0;
prl_tx[port].flags = 0;
}
} else {
if (prl_tx[port].flags & PRL_FLAGS_START_AMS) {
prl_tx[port].flags &= ~PRL_FLAGS_START_AMS;
/*
* First Message in AMS notification
* received from Policy Engine.
*/
set_state(port, PRL_TX_OBJ(port),
prl_tx_snk_start_ams);
return 0;
}
}
}
return RUN_SUPER;
}
static void increment_msgid_counter(int port)
{
prl_tx[port].msg_id_counter[prl_tx[port].sop] =
(prl_tx[port].msg_id_counter[prl_tx[port].sop] + 1) &
PD_MESSAGE_ID_COUNT;
}
/*
* PrlTxDiscard
*/
static unsigned int prl_tx_discard_message(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_discard_message_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_discard_message_entry(int port)
{
prl_tx[port].state_id = PRL_TX_DISCARD_MESSAGE;
/* Increment msgidCounter */
increment_msgid_counter(port);
set_state(port, PRL_TX_OBJ(port), prl_tx_phy_layer_reset);
return 0;
}
static unsigned int prl_tx_discard_message_run(int port)
{
return RUN_SUPER;
}
/*
* PrlTxSrcSourceTx
*/
static unsigned int prl_tx_src_source_tx(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_src_source_tx_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_src_source_tx_entry(int port)
{
prl_tx[port].state_id = PRL_TX_SRC_SOURCE_TX;
/* Set Rp = SinkTxNG */
tcpm_select_rp_value(port, SINK_TX_NG);
tcpm_set_cc(port, TYPEC_CC_RP);
return 0;
}
static unsigned int prl_tx_src_source_tx_run(int port)
{
if (prl_tx[port].flags & PRL_FLAGS_MSG_XMIT) {
prl_tx[port].flags &= ~PRL_FLAGS_MSG_XMIT;
set_state(port, PRL_TX_OBJ(port), prl_tx_src_pending);
}
return RUN_SUPER;
}
/*
* PrlTxSnkStartAms
*/
static unsigned int prl_tx_snk_start_ams(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_snk_start_ams_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_snk_start_ams_entry(int port)
{
prl_tx[port].state_id = PRL_TX_SNK_START_OF_AMS;
return 0;
}
static unsigned int prl_tx_snk_start_ams_run(int port)
{
if (prl_tx[port].flags & PRL_FLAGS_MSG_XMIT) {
prl_tx[port].flags &= ~PRL_FLAGS_MSG_XMIT;
set_state(port, PRL_TX_OBJ(port), prl_tx_snk_pending);
return 0;
}
return RUN_SUPER;
}
/*
* PrlTxLayerResetForTransmit
*/
static unsigned int prl_tx_layer_reset_for_transmit(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_layer_reset_for_transmit_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_layer_reset_for_transmit_entry(int port)
{
int i;
prl_tx[port].state_id = PRL_TX_LAYER_RESET_FOR_TRANSMIT;
/* Reset MessageIdCounters */
for (i = 0; i < NUM_XMIT_TYPES; i++)
prl_tx[port].msg_id_counter[i] = 0;
return 0;
}
static unsigned int prl_tx_layer_reset_for_transmit_run(int port)
{
/* NOTE: PRL_Tx_Construct_Message State embedded here */
prl_tx_construct_message(port);
set_state(port, PRL_TX_OBJ(port), prl_tx_wait_for_phy_response);
return 0;
}
static void prl_tx_construct_message(int port)
{
uint32_t header = PD_HEADER(
pdmsg[port].msg_type,
tc_get_power_role(port),
tc_get_data_role(port),
prl_tx[port].msg_id_counter[pdmsg[port].xmit_type],
pdmsg[port].data_objs,
pdmsg[port].rev,
pdmsg[port].ext);
/* Save SOP* so the correct msg_id_counter can be incremented */
prl_tx[port].sop = pdmsg[port].xmit_type;
/* Pass message to PHY Layer */
tcpm_transmit(port, pdmsg[port].xmit_type, header,
pdmsg[port].chk_buf);
}
/*
* PrlTxWaitForPhyResponse
*/
static unsigned int prl_tx_wait_for_phy_response(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_wait_for_phy_response_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_wait_for_phy_response_entry(int port)
{
prl_tx[port].state_id = PRL_TX_WAIT_FOR_PHY_RESPONSE;
prl_tx[port].tcpc_tx_timeout = get_time().val + PD_T_TCPC_TX_TIMEOUT;
return 0;
}
static unsigned int prl_tx_wait_for_phy_response_run(int port)
{
/* Wait until TX is complete */
/*
* NOTE: The TCPC will set xmit_status to TCPC_TX_COMPLETE_DISCARDED
* when a GoodCRC containing an incorrect MessageID is received.
* This condition satifies the PRL_Tx_Match_MessageID state
* requirement.
*/
if (get_time().val > prl_tx[port].tcpc_tx_timeout ||
prl_tx[port].xmit_status == TCPC_TX_COMPLETE_FAILED ||
prl_tx[port].xmit_status == TCPC_TX_COMPLETE_DISCARDED) {
/* NOTE: PRL_Tx_Check_RetryCounter State embedded here. */
/* Increment check RetryCounter */
prl_tx[port].retry_counter++;
/*
* (RetryCounter > nRetryCount) | Large Extended Message
*/
if (prl_tx[port].retry_counter > N_RETRY_COUNT ||
(pdmsg[port].ext &&
PD_EXT_HEADER_DATA_SIZE(GET_EXT_HEADER(
pdmsg[port].chk_buf[0]) > 26))) {
/*
* NOTE: PRL_Tx_Transmission_Error State embedded
* here.
*/
/*
* State tch_wait_for_transmission_complete will
* inform policy engine of error
*/
pdmsg[port].status_flags |= PRL_FLAGS_TX_ERROR;
/* Increment message id counter */
increment_msgid_counter(port);
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_message_request);
return 0;
}
/* Try to resend the message. */
/* NOTE: PRL_TX_Construct_Message State embedded here. */
prl_tx_construct_message(port);
return 0;
}
if (prl_tx[port].xmit_status == TCPC_TX_COMPLETE_SUCCESS) {
/* NOTE: PRL_TX_Message_Sent State embedded here. */
/* Increment messageId counter */
increment_msgid_counter(port);
/* Inform Policy Engine Message was sent */
pdmsg[port].status_flags |= PRL_FLAGS_TX_COMPLETE;
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_message_request);
return 0;
}
return RUN_SUPER;
}
static unsigned int prl_tx_wait_for_phy_response_exit(int port)
{
prl_tx[port].xmit_status = TCPC_TX_UNSET;
return 0;
}
/* Source Protocol Layer Message Transmission */
/*
* PrlTxSrcPending
*/
static unsigned int prl_tx_src_pending(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_src_pending_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_src_pending_entry(int port)
{
prl_tx[port].state_id = PRL_TX_SRC_PENDING;
/* Start SinkTxTimer */
prl_tx[port].sink_tx_timer = get_time().val + PD_T_SINK_TX;
return 0;
}
static unsigned int prl_tx_src_pending_run(int port)
{
if (get_time().val > prl_tx[port].sink_tx_timer) {
/*
* Soft Reset Message pending &
* SinkTxTimer timeout
*/
if ((emsg[port].len == 0) &&
(pdmsg[port].msg_type == PD_CTRL_SOFT_RESET)) {
set_state(port, PRL_TX_OBJ(port),
prl_tx_layer_reset_for_transmit);
}
/* Message pending (except Soft Reset) &
* SinkTxTimer timeout
*/
else {
prl_tx_construct_message(port);
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_phy_response);
}
return 0;
}
return RUN_SUPER;
}
/*
* PrlTxSnkPending
*/
static unsigned int prl_tx_snk_pending(int port, enum signal sig)
{
int ret;
ret = (*prl_tx_snk_pending_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_tx_snk_pending_entry(int port)
{
prl_tx[port].state_id = PRL_TX_SNK_PENDING;
return 0;
}
static unsigned int prl_tx_snk_pending_run(int port)
{
int cc1;
int cc2;
tcpm_get_cc(port, &cc1, &cc2);
if (cc1 == TYPEC_CC_VOLT_RP_3_0 || cc2 == TYPEC_CC_VOLT_RP_3_0) {
/*
* Soft Reset Message Message pending &
* Rp = SinkTxOk
*/
if ((pdmsg[port].msg_type == PD_CTRL_SOFT_RESET) &&
(emsg[port].len == 0)) {
set_state(port, PRL_TX_OBJ(port),
prl_tx_layer_reset_for_transmit);
}
/*
* Message pending (except Soft Reset) &
* Rp = SinkTxOk
*/
else {
prl_tx_construct_message(port);
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_phy_response);
}
return 0;
}
return RUN_SUPER;
}
/* Hard Reset Operation */
static unsigned int prl_hr_wait_for_request(int port, enum signal sig)
{
int ret;
ret = (*prl_hr_wait_for_request_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_hr_wait_for_request_entry(int port)
{
prl_hr[port].state_id = PRL_HR_WAIT_FOR_REQUEST;
prl_hr[port].flags = 0;
return 0;
}
static unsigned int prl_hr_wait_for_request_run(int port)
{
if (prl_hr[port].flags & PRL_FLAGS_PE_HARD_RESET ||
prl_hr[port].flags & PRL_FLAGS_PORT_PARTNER_HARD_RESET) {
set_state(port, PRL_HR_OBJ(port), prl_hr_reset_layer);
}
return 0;
}
/*
* PrlHrResetLayer
*/
static unsigned int prl_hr_reset_layer(int port, enum signal sig)
{
int ret;
ret = (*prl_hr_reset_layer_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_hr_reset_layer_entry(int port)
{
int i;
prl_hr[port].state_id = PRL_HR_RESET_LAYER;
/* reset messageIDCounters */
for (i = 0; i < NUM_XMIT_TYPES; i++)
prl_tx[port].msg_id_counter[i] = 0;
/*
* Protocol Layer message transmission transitions to
* PRL_Tx_Wait_For_Message_Request state.
*/
set_state(port, PRL_TX_OBJ(port),
prl_tx_wait_for_message_request);
return 0;
}
static unsigned int prl_hr_reset_layer_run(int port)
{
/*
* Protocol Layer reset Complete &
* Hard Reset was initiated by Policy Engine
*/
if (prl_hr[port].flags & PRL_FLAGS_PE_HARD_RESET) {
/* Request PHY to perform a Hard Reset */
prl_send_ctrl_msg(port, TCPC_TX_HARD_RESET, 0);
set_state(port, PRL_HR_OBJ(port),
prl_hr_wait_for_phy_hard_reset_complete);
}
/*
* Protocol Layer reset complete &
* Hard Reset was initiated by Port Partner
*/
else {
/* Inform Policy Engine of the Hard Reset */
pe_got_hard_reset(port);
set_state(port, PRL_HR_OBJ(port),
prl_hr_wait_for_pe_hard_reset_complete);
}
return 0;
}
/*
* PrlHrWaitForPhyHardResetComplete
*/
static unsigned int
prl_hr_wait_for_phy_hard_reset_complete(int port, enum signal sig)
{
int ret;
ret = (*prl_hr_wait_for_phy_hard_reset_complete_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_hr_wait_for_phy_hard_reset_complete_entry(int port)
{
prl_hr[port].state_id = PRL_HR_WAIT_FOR_PHY_HARD_RESET_COMPLETE;
/* Start HardResetCompleteTimer */
prl_hr[port].hard_reset_complete_timer =
get_time().val + PD_T_PS_HARD_RESET;
return 0;
}
static unsigned int prl_hr_wait_for_phy_hard_reset_complete_run(int port)
{
/*
* Wait for hard reset from PHY
* or timeout
*/
if ((pdmsg[port].status_flags & PRL_FLAGS_TX_COMPLETE) ||
(get_time().val > prl_hr[port].hard_reset_complete_timer)) {
/* PRL_HR_PHY_Hard_Reset_Requested */
/* Inform Policy Engine Hard Reset was sent */
pe_hard_reset_sent(port);
set_state(port, PRL_HR_OBJ(port),
prl_hr_wait_for_pe_hard_reset_complete);
return 0;
}
return RUN_SUPER;
}
/*
* PrlHrWaitForPeHardResetComplete
*/
static unsigned int
prl_hr_wait_for_pe_hard_reset_complete(int port, enum signal sig)
{
int ret;
ret = (*prl_hr_wait_for_pe_hard_reset_complete_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int prl_hr_wait_for_pe_hard_reset_complete_entry(int port)
{
prl_hr[port].state_id = PRL_HR_WAIT_FOR_PE_HARD_RESET_COMPLETE;
return 0;
}
static unsigned int prl_hr_wait_for_pe_hard_reset_complete_run(int port)
{
/*
* Wait for Hard Reset complete indication from Policy Engine
*/
if (prl_hr[port].flags & PRL_FLAGS_HARD_RESET_COMPLETE)
set_state(port, PRL_HR_OBJ(port), prl_hr_wait_for_request);
return RUN_SUPER;
}
static unsigned int prl_hr_wait_for_pe_hard_reset_complete_exit(int port)
{
/* Exit from Hard Reset */
set_state(port, PRL_TX_OBJ(port), prl_tx_phy_layer_reset);
set_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
set_state(port, TCH_OBJ(port), tch_wait_for_message_request_from_pe);
return 0;
}
static void copy_chunk_to_ext(int port)
{
/* Calculate number of bytes */
pdmsg[port].num_bytes_received = (PD_HEADER_CNT(emsg[port].header) * 4);
/* Copy chunk into extended message */
memcpy((uint8_t *)emsg[port].buf, (uint8_t *)pdmsg[port].chk_buf,
pdmsg[port].num_bytes_received);
/* Set extended message length */
emsg[port].len = pdmsg[port].num_bytes_received;
}
/*
* Chunked Rx State Machine
*/
static unsigned int
rch_wait_for_message_from_protocol_layer(int port, enum signal sig)
{
int ret;
ret = (*rch_wait_for_message_from_protocol_layer_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static inline void rch_clear_abort_set_chunking(int port)
{
/* Clear Abort flag */
pdmsg[port].status_flags &= ~PRL_FLAGS_ABORT;
/* All Messages are chunked */
rch[port].flags = PRL_FLAGS_CHUNKING;
}
static unsigned int rch_wait_for_message_from_protocol_layer_entry(int port)
{
rch[port].state_id = RCH_WAIT_FOR_MESSAGE_FROM_PROTOCOL_LAYER;
rch_clear_abort_set_chunking(port);
return 0;
}
static unsigned int rch_wait_for_message_from_protocol_layer_run(int port)
{
if (rch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
rch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
/*
* Are we communicating with a PD3.0 device and is
* this an extended message?
*/
if (pdmsg[port].rev == PD_REV30 &&
PD_HEADER_EXT(emsg[port].header)) {
uint16_t exhdr = GET_EXT_HEADER(*pdmsg[port].chk_buf);
uint8_t chunked = PD_EXT_HEADER_CHUNKED(exhdr);
/*
* Received Extended Message &
* (Chunking = 1 & Chunked = 1)
*/
if ((rch[port].flags & PRL_FLAGS_CHUNKING) &&
chunked) {
set_state(port, RCH_OBJ(port),
rch_processing_extended_message);
return 0;
}
/*
* (Received Extended Message &
* (Chunking = 0 & Chunked = 0))
*/
else if (!(rch[port].flags &
PRL_FLAGS_CHUNKING) && !chunked) {
/* Copy chunk to extended buffer */
copy_chunk_to_ext(port);
/* Pass Message to Policy Engine */
pe_pass_up_message(port);
/* Clear Abort flag and set Chunking */
rch_clear_abort_set_chunking(port);
}
/*
* Chunked != Chunking
*/
else {
set_state(port, RCH_OBJ(port),
rch_report_error);
return 0;
}
}
/*
* Received Non-Extended Message
*/
else if (!PD_HEADER_EXT(emsg[port].header)) {
/* Copy chunk to extended buffer */
copy_chunk_to_ext(port);
/* Pass Message to Policy Engine */
pe_pass_up_message(port);
/* Clear Abort flag and set Chunking */
rch_clear_abort_set_chunking(port);
}
/*
* Received an Extended Message while communicating at a
* revision lower than PD3.0
*/
else {
set_state(port, RCH_OBJ(port),
rch_report_error);
return 0;
}
}
return RUN_SUPER;
}
/*
* RchProcessingExtendedMessage
*/
static unsigned int rch_processing_extended_message(int port, enum signal sig)
{
int ret;
ret = (*rch_processing_extended_message_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int rch_processing_extended_message_entry(int port)
{
uint32_t header = emsg[port].header;
uint16_t exhdr = GET_EXT_HEADER(pdmsg[port].chk_buf[0]);
uint8_t chunk_num = PD_EXT_HEADER_CHUNK_NUM(exhdr);
rch[port].state_id = RCH_PROCESSING_EXTENDED_MESSAGE;
/*
* If first chunk:
* Set Chunk_number_expected = 0 and
* Num_Bytes_Received = 0
*/
if (chunk_num == 0) {
pdmsg[port].chunk_number_expected = 0;
pdmsg[port].num_bytes_received = 0;
pdmsg[port].msg_type = PD_HEADER_TYPE(header);
}
return 0;
}
static unsigned int rch_processing_extended_message_run(int port)
{
uint16_t exhdr = GET_EXT_HEADER(pdmsg[port].chk_buf[0]);
uint8_t chunk_num = PD_EXT_HEADER_CHUNK_NUM(exhdr);
uint32_t data_size = PD_EXT_HEADER_DATA_SIZE(exhdr);
uint32_t byte_num;
/*
* Abort Flag Set
*/
if (pdmsg[port].status_flags & PRL_FLAGS_ABORT) {
set_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
}
/*
* If expected Chunk Number:
* Append data to Extended_Message_Buffer
* Increment Chunk_number_Expected
* Adjust Num Bytes Received
*/
else if (chunk_num == pdmsg[port].chunk_number_expected) {
byte_num = data_size - pdmsg[port].num_bytes_received;
if (byte_num > 25)
byte_num = 26;
/* Make sure extended message buffer does not overflow */
if (pdmsg[port].num_bytes_received +
byte_num > EXTENDED_BUFFER_SIZE) {
set_state(port, RCH_OBJ(port), rch_report_error);
return 0;
}
/* Append data */
/* Add 2 to chk_buf to skip over extended message header */
memcpy(((uint8_t *)emsg[port].buf +
pdmsg[port].num_bytes_received),
(uint8_t *)pdmsg[port].chk_buf + 2, byte_num);
/* increment chunk number expected */
pdmsg[port].chunk_number_expected++;
/* adjust num bytes received */
pdmsg[port].num_bytes_received += byte_num;
/* Was that the last chunk? */
if (pdmsg[port].num_bytes_received >= data_size) {
emsg[port].len = pdmsg[port].num_bytes_received;
/* Pass Message to Policy Engine */
pe_pass_up_message(port);
set_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
}
/*
* Message not Complete
*/
else
set_state(port, RCH_OBJ(port), rch_requesting_chunk);
}
/*
* Unexpected Chunk Number
*/
else
set_state(port, RCH_OBJ(port), rch_report_error);
return 0;
}
/*
* RchRequestingChunk
*/
static unsigned int rch_requesting_chunk(int port, enum signal sig)
{
int ret;
ret = (*rch_requesting_chunk_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int rch_requesting_chunk_entry(int port)
{
rch[port].state_id = RCH_REQUESTING_CHUNK;
/*
* Send Chunk Request to Protocol Layer
* with chunk number = Chunk_Number_Expected
*/
pdmsg[port].chk_buf[0] = PD_EXT_HEADER(
pdmsg[port].chunk_number_expected,
1, /* Request Chunk */
0 /* Data Size */
);
pdmsg[port].data_objs = 1;
pdmsg[port].ext = 1;
prl_tx[port].flags |= PRL_FLAGS_MSG_XMIT;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_TX, 0);
return 0;
}
static unsigned int rch_requesting_chunk_run(int port)
{
/*
* Transmission Error from Protocol Layer or
* Message Received From Protocol Layer
*/
if (rch[port].flags & PRL_FLAGS_MSG_RECEIVED ||
pdmsg[port].status_flags & PRL_FLAGS_TX_ERROR) {
/*
* Leave PRL_FLAGS_MSG_RECEIVED flag set. It'll be
* cleared in rch_report_error state
*/
set_state(port, RCH_OBJ(port), rch_report_error);
}
/*
* Message Transmitted received from Protocol Layer
*/
else if (pdmsg[port].status_flags & PRL_FLAGS_TX_COMPLETE) {
pdmsg[port].status_flags &= ~PRL_FLAGS_TX_COMPLETE;
set_state(port, RCH_OBJ(port), rch_waiting_chunk);
} else
return RUN_SUPER;
return 0;
}
/*
* RchWaitingChunk
*/
static unsigned int rch_waiting_chunk(int port, enum signal sig)
{
int ret;
ret = (*rch_waiting_chunk_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int rch_waiting_chunk_entry(int port)
{
rch[port].state_id = RCH_WAITING_CHUNK;
/*
* Start ChunkSenderResponseTimer
*/
rch[port].chunk_sender_response_timer =
get_time().val + PD_T_CHUNK_SENDER_RESPONSE;
return 0;
}
static unsigned int rch_waiting_chunk_run(int port)
{
if ((rch[port].flags & PRL_FLAGS_MSG_RECEIVED)) {
/*
* Leave PRL_FLAGS_MSG_RECEIVED flag set just in case an error
* is detected. If an error is detected, PRL_FLAGS_MSG_RECEIVED
* will be cleared in rch_report_error state.
*/
if (PD_HEADER_EXT(emsg[port].header)) {
uint16_t exhdr = GET_EXT_HEADER(pdmsg[port].chk_buf[0]);
/*
* Other Message Received from Protocol Layer
*/
if (PD_EXT_HEADER_REQ_CHUNK(exhdr) ||
!PD_EXT_HEADER_CHUNKED(exhdr)) {
set_state(port, RCH_OBJ(port),
rch_report_error);
}
/*
* Chunk response Received from Protocol Layer
*/
else {
/*
* No error wad detected, so clear
* PRL_FLAGS_MSG_RECEIVED flag.
*/
rch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
set_state(port, RCH_OBJ(port),
rch_processing_extended_message);
}
return 0;
}
}
/*
* ChunkSenderResponseTimer Timeout
*/
else if (get_time().val > rch[port].chunk_sender_response_timer) {
set_state(port, RCH_OBJ(port), rch_report_error);
return 0;
}
return RUN_SUPER;
}
/*
* RchReportError
*/
static unsigned int rch_report_error(int port, enum signal sig)
{
int ret;
ret = (*rch_report_error_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int rch_report_error_entry(int port)
{
rch[port].state_id = RCH_REPORT_ERROR;
/*
* If the state was entered because a message was received,
* this message is passed to the Policy Engine.
*/
if (rch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
rch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
/* Copy chunk to extended buffer */
copy_chunk_to_ext(port);
/* Pass Message to Policy Engine */
pe_pass_up_message(port);
/* Report error */
pe_report_error(port, ERR_RCH_MSG_REC);
} else {
/* Report error */
pe_report_error(port, ERR_RCH_CHUNKED);
}
return 0;
}
static unsigned int rch_report_error_run(int port)
{
set_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
return 0;
}
/*
* Chunked Tx State Machine
*/
static unsigned int
tch_wait_for_message_request_from_pe(int port, enum signal sig)
{
int ret;
ret = (*tch_wait_for_message_request_from_pe_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static inline void tch_clear_abort_set_chunking(int port)
{
/* Clear Abort flag */
pdmsg[port].status_flags &= ~PRL_FLAGS_ABORT;
/* All Messages are chunked */
tch[port].flags = PRL_FLAGS_CHUNKING;
}
static unsigned int tch_wait_for_message_request_from_pe_entry(int port)
{
tch[port].state_id = TCH_WAIT_FOR_MESSAGE_REQUEST_FROM_PE;
tch_clear_abort_set_chunking(port);
return 0;
}
static unsigned int tch_wait_for_message_request_from_pe_run(int port)
{
/*
* Any message received and not in state TCH_Wait_Chunk_Request
*/
if (tch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
tch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
set_state(port, TCH_OBJ(port), tch_message_received);
return 0;
} else if (tch[port].flags & PRL_FLAGS_MSG_XMIT) {
tch[port].flags &= ~PRL_FLAGS_MSG_XMIT;
/*
* Rx Chunking State != RCH_Wait_For_Message_From_Protocol_Layer
* & Abort Supported
*
* Discard the Message
*/
if (rch[port].state_id !=
RCH_WAIT_FOR_MESSAGE_FROM_PROTOCOL_LAYER) {
/* Report Error To Policy Engine */
pe_report_error(port, ERR_TCH_XMIT);
tch_clear_abort_set_chunking(port);
} else {
/*
* Extended Message Request & Chunking
*/
if ((pdmsg[port].rev == PD_REV30) && pdmsg[port].ext &&
(tch[port].flags & PRL_FLAGS_CHUNKING)) {
pdmsg[port].send_offset = 0;
pdmsg[port].chunk_number_to_send = 0;
set_state(port, TCH_OBJ(port),
tch_construct_chunked_message);
} else
/*
* Non-Extended Message Request
*/
{
/* Make sure buffer doesn't overflow */
if (emsg[port].len > BUFFER_SIZE) {
/* Report Error To Policy Engine */
pe_report_error(port, ERR_TCH_XMIT);
tch_clear_abort_set_chunking(port);
return 0;
}
/* Copy message to chunked buffer */
memset((uint8_t *)pdmsg[port].chk_buf,
0, BUFFER_SIZE);
memcpy((uint8_t *)pdmsg[port].chk_buf,
(uint8_t *)emsg[port].buf,
emsg[port].len);
/*
* Pad length to 4-byte boundery and
* convert to number of 32-bit objects.
* Since the value is shifted right by 2,
* no need to explicitly clear the lower
* 2-bits.
*/
pdmsg[port].data_objs =
(emsg[port].len + 3) >> 2;
/* Pass Message to Protocol Layer */
prl_tx[port].flags |= PRL_FLAGS_MSG_XMIT;
set_state(port, TCH_OBJ(port),
tch_wait_for_transmission_complete);
}
return 0;
}
}
return RUN_SUPER;
}
/*
* TchWaitForTransmissionComplete
*/
static unsigned int
tch_wait_for_transmission_complete(int port, enum signal sig)
{
int ret;
ret = (*tch_wait_for_transmission_complete_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int tch_wait_for_transmission_complete_entry(int port)
{
tch[port].state_id = TCH_WAIT_FOR_TRANSMISSION_COMPLETE;
return 0;
}
static unsigned int tch_wait_for_transmission_complete_run(int port)
{
/*
* Any message received and not in state TCH_Wait_Chunk_Request
*/
if (tch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
tch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
set_state(port, TCH_OBJ(port), tch_message_received);
return 0;
}
/*
* Inform Policy Engine that Message was sent.
*/
if (pdmsg[port].status_flags & PRL_FLAGS_TX_COMPLETE) {
pdmsg[port].status_flags &= ~PRL_FLAGS_TX_COMPLETE;
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
/* Tell PE message was sent */
pe_message_sent(port);
}
/*
* Inform Policy Engine of Tx Error
*/
else if (pdmsg[port].status_flags & PRL_FLAGS_TX_ERROR) {
pdmsg[port].status_flags &= ~PRL_FLAGS_TX_ERROR;
/* Tell PE an error occurred */
pe_report_error(port, ERR_TCH_XMIT);
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
}
return 0;
}
/*
* TchConstructChunkedMessage
*/
static unsigned int tch_construct_chunked_message(int port, enum signal sig)
{
int ret;
ret = (*tch_construct_chunked_message_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int tch_construct_chunked_message_entry(int port)
{
uint16_t *ext_hdr;
uint8_t *data;
uint16_t num;
tch[port].state_id = TCH_CONSTRUCT_CHUNKED_MESSAGE;
/*
* Any message received and not in state TCH_Wait_Chunk_Request
*/
if (tch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
tch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
set_state(port, TCH_OBJ(port), tch_message_received);
return 0;
}
/* Prepare to copy chunk into chk_buf */
ext_hdr = (uint16_t *)pdmsg[port].chk_buf;
data = ((uint8_t *)pdmsg[port].chk_buf + 2);
num = emsg[port].len - pdmsg[port].send_offset;
if (num > 26)
num = 26;
/* Set the chunks extended header */
*ext_hdr = PD_EXT_HEADER(pdmsg[port].chunk_number_to_send,
0, /* Chunk Request */
emsg[port].len);
/* Copy the message chunk into chk_buf */
memset(data, 0, 28);
memcpy(data, emsg[port].buf + pdmsg[port].send_offset, num);
pdmsg[port].send_offset += num;
/*
* Add in 2 bytes for extended header
* pad out to 4-byte boundary
* convert to number of 4-byte words
* Since the value is shifted right by 2,
* no need to explicitly clear the lower
* 2-bits.
*/
pdmsg[port].data_objs = (num + 2 + 3) >> 2;
/* Pass message chunk to Protocol Layer */
prl_tx[port].flags |= PRL_FLAGS_MSG_XMIT;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
return 0;
}
static unsigned int tch_construct_chunked_message_run(int port)
{
if (pdmsg[port].status_flags & PRL_FLAGS_ABORT)
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
else
set_state(port, TCH_OBJ(port),
tch_sending_chunked_message);
return 0;
}
/*
* TchSendingChunkedMessage
*/
static unsigned int tch_sending_chunked_message(int port, enum signal sig)
{
int ret;
ret = (*tch_sending_chunked_message_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int tch_sending_chunked_message_entry(int port)
{
tch[port].state_id = TCH_SENDING_CHUNKED_MESSAGE;
return 0;
}
static unsigned int tch_sending_chunked_message_run(int port)
{
/*
* Any message received and not in state TCH_Wait_Chunk_Request
*/
if (tch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
tch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
set_state(port, TCH_OBJ(port), tch_message_received);
return 0;
}
/*
* Transmission Error
*/
if (pdmsg[port].status_flags & PRL_FLAGS_TX_ERROR) {
pe_report_error(port, ERR_TCH_XMIT);
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
}
/*
* Message Transmitted from Protocol Layer &
* Last Chunk
*/
else if (emsg[port].len == pdmsg[port].send_offset) {
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
/* Tell PE message was sent */
pe_message_sent(port);
}
/*
* Message Transmitted from Protocol Layer &
* Not Last Chunk
*/
else
set_state(port, TCH_OBJ(port), tch_wait_chunk_request);
return 0;
}
/*
* TchWaitChunkRequest
*/
static unsigned int tch_wait_chunk_request(int port, enum signal sig)
{
int ret;
ret = (*tch_wait_chunk_request_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int tch_wait_chunk_request_entry(int port)
{
tch[port].state_id = TCH_WAIT_CHUNK_REQUEST;
/* Increment Chunk Number to Send */
pdmsg[port].chunk_number_to_send++;
/* Start Chunk Sender Request Timer */
tch[port].chunk_sender_request_timer =
get_time().val + PD_T_CHUNK_SENDER_REQUEST;
return 0;
}
static unsigned int tch_wait_chunk_request_run(int port)
{
if (tch[port].flags & PRL_FLAGS_MSG_RECEIVED) {
tch[port].flags &= ~PRL_FLAGS_MSG_RECEIVED;
if (PD_HEADER_EXT(emsg[port].header)) {
uint16_t exthdr;
exthdr = GET_EXT_HEADER(pdmsg[port].chk_buf[0]);
if (PD_EXT_HEADER_REQ_CHUNK(exthdr)) {
/*
* Chunk Request Received &
* Chunk Number = Chunk Number to Send
*/
if (PD_EXT_HEADER_CHUNK_NUM(exthdr) ==
pdmsg[port].chunk_number_to_send) {
set_state(port, TCH_OBJ(port),
tch_construct_chunked_message);
}
/*
* Chunk Request Received &
* Chunk Number != Chunk Number to Send
*/
else {
pe_report_error(port, ERR_TCH_CHUNKED);
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
}
return 0;
}
}
/*
* Other message received
*/
set_state(port, TCH_OBJ(port), tch_message_received);
}
/*
* ChunkSenderRequestTimer timeout
*/
else if (get_time().val >=
tch[port].chunk_sender_request_timer) {
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
/* Tell PE message was sent */
pe_message_sent(port);
}
return 0;
}
/*
* TchMessageReceived
*/
static unsigned int tch_message_received(int port, enum signal sig)
{
int ret;
ret = (*tch_message_received_sig[sig])(port);
return SUPER(ret, sig, 0);
}
static unsigned int tch_message_received_entry(int port)
{
tch[port].state_id = TCH_MESSAGE_RECEIVED;
/* Pass message to chunked Rx */
rch[port].flags |= PRL_FLAGS_MSG_RECEIVED;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SM, 0);
return 0;
}
static unsigned int tch_message_received_run(int port)
{
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
return 0;
}
/*
* Protocol Layer Message Reception State Machine
*/
static unsigned int prl_rx_wait_for_phy_message(int port, int evt)
{
uint32_t header;
uint8_t type;
uint8_t cnt;
uint8_t sop;
int8_t msid;
int ret;
/* process any potential incoming message */
if (tcpm_has_pending_message(port)) {
ret = tcpm_dequeue_message(port, pdmsg[port].chk_buf, &header);
if (ret == 0) {
emsg[port].header = header;
type = PD_HEADER_TYPE(header);
cnt = PD_HEADER_CNT(header);
msid = PD_HEADER_ID(header);
sop = PD_HEADER_GET_SOP(header);
if (cnt == 0 && type == PD_CTRL_SOFT_RESET) {
int i;
for (i = 0; i < NUM_XMIT_TYPES; i++) {
/* Clear MessageIdCounter */
prl_tx[port].msg_id_counter[i] = 0;
/* Clear stored MessageID value */
prl_rx[port].msg_id[i] = -1;
}
/* Inform Policy Engine of Soft Reset */
pe_got_soft_reset(port);
/* Soft Reset occurred */
set_state(port, PRL_TX_OBJ(port),
prl_tx_phy_layer_reset);
set_state(port, RCH_OBJ(port),
rch_wait_for_message_from_protocol_layer);
set_state(port, TCH_OBJ(port),
tch_wait_for_message_request_from_pe);
}
/*
* Ignore if this is a duplicate message.
*/
if (prl_rx[port].msg_id[sop] != msid) {
/*
* Discard any pending tx message if this is
* not a ping message
*/
if ((pdmsg[port].rev == PD_REV30) &&
(cnt == 0) && type != PD_CTRL_PING) {
if (prl_tx[port].state_id ==
PRL_TX_SRC_PENDING ||
prl_tx[port].state_id ==
PRL_TX_SNK_PENDING) {
set_state(port,
PRL_TX_OBJ(port),
prl_tx_discard_message);
}
}
/* Store Message Id */
prl_rx[port].msg_id[sop] = msid;
/* RTR Chunked Message Router States. */
/*
* Received Ping from Protocol Layer
*/
if (cnt == 0 && type == PD_CTRL_PING) {
/* NOTE: RTR_PING State embedded
* here.
*/
emsg[port].len = 0;
pe_pass_up_message(port);
return 0;
}
/*
* Message (not Ping) Received from
* Protocol Layer & Doing Tx Chunks
*/
else if (tch[port].state_id !=
TCH_WAIT_FOR_MESSAGE_REQUEST_FROM_PE) {
/* NOTE: RTR_TX_CHUNKS State embedded
* here.
*/
/*
* Send Message to Tx Chunk
* Chunk State Machine
*/
tch[port].flags |=
PRL_FLAGS_MSG_RECEIVED;
}
/*
* Message (not Ping) Received from
* Protocol Layer & Not Doing Tx Chunks
*/
else {
/*
* NOTE: RTR_RX_CHUNKS State embedded
* here.
*/
/*
* Send Message to Rx
* Chunk State Machine
*/
rch[port].flags |=
PRL_FLAGS_MSG_RECEIVED;
}
task_set_event(PD_PORT_TO_TASK_ID(port),
PD_EVENT_SM, 0);
}
}
}
return 0;
}
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