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OpenCellular/common/usb_pd_protocol.c
Alec Berg e3cd6444aa pd: implement TCPC RX Detect register to enable/disable TCPC RX 
Implement the TCPC RX Detect register and use it for the TCPM to
enable and disable PD communication. When no type-C connection,
disable TCPC RX so that we don't send goodCRC when we are not
ready. Once TCPM establishes a type-C connection, enable TCPC RX.

BUG=none
BRANCH=none
TEST=tested on glados and on samus. On glados, without this change,
sometimes when you plug in zinger, we get into a hard reset loop
because TCPC is sending goodCRC to source cap while TCPM is still
debouncing CC and is not ready. With this change, we reliably form
PD contract.

Also tested enabling and disabling PD comms from the TCPM console
with "pd enable 0|1".

Change-Id: I8c9e696f2597978436f6ceccfe06ffb021c95ea3
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/274811
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
2015-06-03 03:50:06 +00:00

3129 lines
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/* Copyright (c) 2014 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 "board.h"
#include "case_closed_debug.h"
#include "charge_manager.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 "util.h"
#include "usb_pd.h"
#include "usb_pd_tcpm.h"
#include "version.h"
#ifdef CONFIG_COMMON_RUNTIME
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
/*
* Debug log level - higher number == more log
* Level 0: Log state transitions
* Level 1: Level 0, plus packet info
* Level 2: Level 1, plus ping packet and packet dump on error
*
* Note that higher log level causes timing changes and thus may affect
* performance.
*/
static int debug_level;
/*
* PD communication enabled flag. When false, PD state machine still
* detects source/sink connection and disconnection, and will still
* provide VBUS, but never sends any PD communication.
*/
static uint8_t pd_comm_enabled = CONFIG_USB_PD_COMM_ENABLED;
#else
#define CPRINTF(format, args...)
static const int debug_level;
static const uint8_t pd_comm_enabled = 1;
#endif
#ifdef CONFIG_USB_PD_DUAL_ROLE
#define DUAL_ROLE_IF_ELSE(port, sink_clause, src_clause) \
(pd[port].power_role == PD_ROLE_SINK ? (sink_clause) : (src_clause))
#else
#define DUAL_ROLE_IF_ELSE(port, sink_clause, src_clause) (src_clause)
#endif
#define READY_RETURN_STATE(port) DUAL_ROLE_IF_ELSE(port, PD_STATE_SNK_READY, \
PD_STATE_SRC_READY)
/* Type C supply voltage (mV) */
#define TYPE_C_VOLTAGE 5000 /* mV */
/* PD counter definitions */
#define PD_MESSAGE_ID_COUNT 7
#define PD_HARD_RESET_COUNT 2
#define PD_CAPS_COUNT 50
enum vdm_states {
VDM_STATE_ERR_BUSY = -3,
VDM_STATE_ERR_SEND = -2,
VDM_STATE_ERR_TMOUT = -1,
VDM_STATE_DONE = 0,
/* Anything >0 represents an active state */
VDM_STATE_READY = 1,
VDM_STATE_BUSY = 2,
VDM_STATE_WAIT_RSP_BUSY = 3,
};
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Port dual-role state */
enum pd_dual_role_states drp_state = PD_DRP_TOGGLE_OFF;
/* Last received source cap */
static uint32_t pd_src_caps[CONFIG_USB_PD_PORT_COUNT][PDO_MAX_OBJECTS];
static int pd_src_cap_cnt[CONFIG_USB_PD_PORT_COUNT];
#endif
static struct pd_protocol {
/* current port power role (SOURCE or SINK) */
uint8_t power_role;
/* current port data role (DFP or UFP) */
uint8_t data_role;
/* port flags, see PD_FLAGS_* */
uint16_t flags;
/* 3-bit rolling message ID counter */
uint8_t msg_id;
/* Port polarity : 0 => CC1 is CC line, 1 => CC2 is CC line */
uint8_t polarity;
/* PD state for port */
enum pd_states task_state;
/* PD state when we run state handler the last time */
enum pd_states last_state;
/* The state to go to after timeout */
enum pd_states timeout_state;
/* Timeout for the current state. Set to 0 for no timeout. */
uint64_t timeout;
/* Time for source recovery after hard reset */
uint64_t src_recover;
/* Time for CC debounce end */
uint64_t cc_debounce;
/* The cc state */
enum pd_cc_states cc_state;
/* status of last transmit */
uint8_t tx_status;
/* last requested voltage PDO index */
int requested_idx;
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Current limit / voltage based on the last request message */
uint32_t curr_limit;
uint32_t supply_voltage;
/* Signal charging update that affects the port */
int new_power_request;
/* Store previously requested voltage request */
int prev_request_mv;
#endif
/* PD state for Vendor Defined Messages */
enum vdm_states vdm_state;
/* Timeout for the current vdm state. Set to 0 for no timeout. */
timestamp_t vdm_timeout;
/* next Vendor Defined Message to send */
uint32_t vdo_data[VDO_MAX_SIZE];
uint8_t vdo_count;
/* VDO to retry if UFP responder replied busy. */
uint32_t vdo_retry;
/* 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;
} pd[CONFIG_USB_PD_PORT_COUNT];
#ifdef CONFIG_COMMON_RUNTIME
static const char * const pd_state_names[] = {
"DISABLED", "SUSPENDED",
#ifdef CONFIG_USB_PD_DUAL_ROLE
"SNK_DISCONNECTED", "SNK_DISCONNECTED_DEBOUNCE",
"SNK_HARD_RESET_RECOVER",
"SNK_DISCOVERY", "SNK_REQUESTED", "SNK_TRANSITION", "SNK_READY",
"SNK_SWAP_INIT", "SNK_SWAP_SNK_DISABLE",
"SNK_SWAP_SRC_DISABLE", "SNK_SWAP_STANDBY", "SNK_SWAP_COMPLETE",
#endif /* CONFIG_USB_PD_DUAL_ROLE */
"SRC_DISCONNECTED", "SRC_DISCONNECTED_DEBOUNCE", "SRC_ACCESSORY",
"SRC_HARD_RESET_RECOVER", "SRC_STARTUP",
"SRC_DISCOVERY", "SRC_NEGOCIATE", "SRC_ACCEPTED", "SRC_POWERED",
"SRC_TRANSITION", "SRC_READY", "SRC_GET_SNK_CAP", "DR_SWAP",
#ifdef CONFIG_USB_PD_DUAL_ROLE
"SRC_SWAP_INIT", "SRC_SWAP_SNK_DISABLE", "SRC_SWAP_SRC_DISABLE",
"SRC_SWAP_STANDBY",
#ifdef CONFIG_USBC_VCONN_SWAP
"VCONN_SWAP_SEND", "VCONN_SWAP_INIT", "VCONN_SWAP_READY",
#endif /* CONFIG_USBC_VCONN_SWAP */
#endif /* CONFIG_USB_PD_DUAL_ROLE */
"SOFT_RESET", "HARD_RESET_SEND", "HARD_RESET_EXECUTE", "BIST_RX",
"BIST_TX",
};
BUILD_ASSERT(ARRAY_SIZE(pd_state_names) == PD_STATE_COUNT);
#endif
/*
* 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
static inline void set_state_timeout(int port,
uint64_t timeout,
enum pd_states timeout_state)
{
pd[port].timeout = timeout;
pd[port].timeout_state = timeout_state;
}
/* Return flag for pd state is connected */
int pd_is_connected(int port)
{
if (pd[port].task_state == PD_STATE_DISABLED)
return 0;
return DUAL_ROLE_IF_ELSE(port,
/* sink */
pd[port].task_state != PD_STATE_SNK_DISCONNECTED &&
pd[port].task_state != PD_STATE_SNK_DISCONNECTED_DEBOUNCE,
/* source */
pd[port].task_state != PD_STATE_SRC_DISCONNECTED &&
pd[port].task_state != PD_STATE_SRC_DISCONNECTED_DEBOUNCE &&
pd[port].task_state != PD_STATE_SRC_ACCESSORY);
}
static inline void set_state(int port, enum pd_states next_state)
{
enum pd_states last_state = pd[port].task_state;
#ifdef CONFIG_LOW_POWER_IDLE
int i;
#endif
set_state_timeout(port, 0, 0);
pd[port].task_state = next_state;
if (last_state == next_state)
return;
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Ignore dual-role toggling between sink and source */
if ((last_state == PD_STATE_SNK_DISCONNECTED &&
next_state == PD_STATE_SRC_DISCONNECTED) ||
(last_state == PD_STATE_SRC_DISCONNECTED &&
next_state == PD_STATE_SNK_DISCONNECTED))
return;
#endif
#ifdef CONFIG_USB_PD_DUAL_ROLE
if (next_state == PD_STATE_SRC_DISCONNECTED ||
next_state == PD_STATE_SNK_DISCONNECTED) {
/* Clear the input current limit */
pd_set_input_current_limit(port, 0, 0);
#ifdef CONFIG_CHARGE_MANAGER
typec_set_input_current_limit(port, 0, 0);
charge_manager_set_ceil(port, CHARGE_CEIL_NONE);
#endif
#else /* CONFIG_USB_PD_DUAL_ROLE */
if (next_state == PD_STATE_SRC_DISCONNECTED) {
#endif
pd[port].dev_id = 0;
pd[port].flags &= ~PD_FLAGS_RESET_ON_DISCONNECT_MASK;
#ifdef CONFIG_CHARGE_MANAGER
charge_manager_update_dualrole(port, CAP_UNKNOWN);
#endif
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
pd_dfp_exit_mode(port, 0, 0);
#endif
#ifdef CONFIG_USBC_SS_MUX
board_set_usb_mux(port, TYPEC_MUX_NONE, USB_SWITCH_DISCONNECT,
pd[port].polarity);
#endif
#ifdef CONFIG_USBC_VCONN
tcpm_set_vconn(port, 0);
#endif
/* Disable TCPC RX */
tcpm_set_rx_enable(port, 0);
}
#ifdef CONFIG_LOW_POWER_IDLE
/* If any PD port is connected, then disable deep sleep */
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
if (pd_is_connected(i))
break;
}
if (i == CONFIG_USB_PD_PORT_COUNT)
enable_sleep(SLEEP_MASK_USB_PD);
else
disable_sleep(SLEEP_MASK_USB_PD);
#endif
CPRINTF("C%d st%d\n", port, next_state);
}
/* increment message ID counter */
static void inc_id(int port)
{
pd[port].msg_id = (pd[port].msg_id + 1) & PD_MESSAGE_ID_COUNT;
}
static void pd_transmit_complete(int port, int status)
{
if (status & TCPC_REG_ALERT1_TX_SUCCESS)
inc_id(port);
pd[port].tx_status = status;
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_TX, 0);
}
static int pd_transmit(int port, enum tcpm_transmit_type type,
uint16_t header, const uint32_t *data)
{
int evt;
/* If comms are disabled, do not transmit, return error */
if (!pd_comm_enabled)
return -1;
tcpm_transmit(port, type, header, data);
/* Wait until TX is complete */
do {
evt = task_wait_event(PD_T_TCPC_TX_TIMEOUT);
} while (!(evt & (TASK_EVENT_TIMER | PD_EVENT_TX)));
if (evt & TASK_EVENT_TIMER)
return -1;
/* TODO: give different error condition for failed vs discarded */
return pd[port].tx_status & TCPC_REG_ALERT1_TX_SUCCESS ? 1 : -1;
}
static void pd_update_roles(int port)
{
/* Notify TCPC of role update */
tcpm_set_msg_header(port, pd[port].power_role, pd[port].data_role);
}
static int send_control(int port, int type)
{
int bit_len;
uint16_t header = PD_HEADER(type, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, 0);
bit_len = pd_transmit(port, TRANSMIT_SOP, header, NULL);
if (debug_level >= 1)
CPRINTF("CTRL[%d]>%d\n", type, bit_len);
return bit_len;
}
static int send_source_cap(int port)
{
int bit_len;
#ifdef CONFIG_USB_PD_DYNAMIC_SRC_CAP
const uint32_t *src_pdo;
const int src_pdo_cnt = pd_get_source_pdo(&src_pdo);
#else
const uint32_t *src_pdo = pd_src_pdo;
const int src_pdo_cnt = pd_src_pdo_cnt;
#endif
uint16_t header;
if (src_pdo_cnt == 0)
/* No source capabilities defined, sink only */
header = PD_HEADER(PD_CTRL_REJECT, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, 0);
else
header = PD_HEADER(PD_DATA_SOURCE_CAP, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, src_pdo_cnt);
bit_len = pd_transmit(port, TRANSMIT_SOP, header, src_pdo);
if (debug_level >= 1)
CPRINTF("srcCAP>%d\n", bit_len);
return bit_len;
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
static void send_sink_cap(int port)
{
int bit_len;
uint16_t header = PD_HEADER(PD_DATA_SINK_CAP, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, pd_snk_pdo_cnt);
bit_len = pd_transmit(port, TRANSMIT_SOP, header, pd_snk_pdo);
if (debug_level >= 1)
CPRINTF("snkCAP>%d\n", bit_len);
}
static int send_request(int port, uint32_t rdo)
{
int bit_len;
uint16_t header = PD_HEADER(PD_DATA_REQUEST, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, 1);
bit_len = pd_transmit(port, TRANSMIT_SOP, header, &rdo);
if (debug_level >= 1)
CPRINTF("REQ%d>\n", bit_len);
return bit_len;
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */
#ifdef CONFIG_COMMON_RUNTIME
static int send_bist_cmd(int port)
{
/* currently only support sending bist carrier 2 */
uint32_t bdo = BDO(BDO_MODE_CARRIER2, 0);
int bit_len;
uint16_t header = PD_HEADER(PD_DATA_BIST, pd[port].power_role,
pd[port].data_role, pd[port].msg_id, 1);
bit_len = pd_transmit(port, TRANSMIT_SOP, header, &bdo);
CPRINTF("BIST>%d\n", bit_len);
return bit_len;
}
#endif
static void queue_vdm(int port, uint32_t *header, const uint32_t *data,
int data_cnt)
{
pd[port].vdo_count = data_cnt + 1;
pd[port].vdo_data[0] = header[0];
memcpy(&pd[port].vdo_data[1], data, sizeof(uint32_t) * data_cnt);
/* Set ready, pd task will actually send */
pd[port].vdm_state = VDM_STATE_READY;
}
static void handle_vdm_request(int port, int cnt, uint32_t *payload)
{
int rlen = 0;
uint32_t *rdata;
if (pd[port].vdm_state == VDM_STATE_BUSY) {
/* If UFP responded busy retry after timeout */
if (PD_VDO_CMDT(payload[0]) == CMDT_RSP_BUSY) {
pd[port].vdm_timeout.val = get_time().val +
PD_T_VDM_BUSY;
pd[port].vdm_state = VDM_STATE_WAIT_RSP_BUSY;
pd[port].vdo_retry = (payload[0] & ~VDO_CMDT_MASK) |
CMDT_INIT;
return;
} else {
pd[port].vdm_state = VDM_STATE_DONE;
}
}
if (PD_VDO_SVDM(payload[0]))
rlen = pd_svdm(port, cnt, payload, &rdata);
else
rlen = pd_custom_vdm(port, cnt, payload, &rdata);
if (rlen > 0) {
queue_vdm(port, rdata, &rdata[1], rlen - 1);
return;
}
if (debug_level >= 1)
CPRINTF("Unhandled VDM VID %04x CMD %04x\n",
PD_VDO_VID(payload[0]), payload[0] & 0xFFFF);
}
static void execute_hard_reset(int port)
{
if (pd[port].last_state == PD_STATE_HARD_RESET_SEND)
CPRINTF("C%d HARD RST TX\n", port);
else
CPRINTF("C%d HARD RST RX\n", port);
pd[port].msg_id = 0;
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
pd_dfp_exit_mode(port, 0, 0);
#endif
/*
* Fake set last state to hard reset to make sure that the next
* state to run knows that we just did a hard reset.
*/
pd[port].last_state = PD_STATE_HARD_RESET_EXECUTE;
#ifdef CONFIG_USB_PD_DUAL_ROLE
/*
* If we are swapping to a source and have changed to Rp, restore back
* to Rd and turn off vbus to match our power_role.
*/
if (pd[port].task_state == PD_STATE_SNK_SWAP_STANDBY ||
pd[port].task_state == PD_STATE_SNK_SWAP_COMPLETE) {
tcpm_set_cc(port, TYPEC_CC_RD);
pd_power_supply_reset(port);
}
if (pd[port].power_role == PD_ROLE_SINK) {
/* Clear the input current limit */
pd_set_input_current_limit(port, 0, 0);
#ifdef CONFIG_CHARGE_MANAGER
charge_manager_set_ceil(port, CHARGE_CEIL_NONE);
#endif /* CONFIG_CHARGE_MANAGER */
set_state(port, PD_STATE_SNK_HARD_RESET_RECOVER);
return;
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */
/* We are a source, cut power */
pd_power_supply_reset(port);
pd[port].src_recover = get_time().val + PD_T_SRC_RECOVER;
set_state(port, PD_STATE_SRC_HARD_RESET_RECOVER);
}
static void execute_soft_reset(int port)
{
pd[port].msg_id = 0;
set_state(port, DUAL_ROLE_IF_ELSE(port, PD_STATE_SNK_DISCOVERY,
PD_STATE_SRC_DISCOVERY));
#ifdef CONFIG_COMMON_RUNTIME
/* if flag to disable PD comms after soft reset, then disable comms */
if (pd[port].flags & PD_FLAGS_SFT_RST_DIS_COMM)
pd_comm_enable(0);
#endif
CPRINTF("C%d Soft Rst\n", port);
}
void pd_soft_reset(void)
{
int i;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; ++i)
if (pd_is_connected(i)) {
set_state(i, PD_STATE_SOFT_RESET);
task_wake(PD_PORT_TO_TASK_ID(i));
}
}
void pd_prepare_sysjump(void)
{
int i;
/*
* On sysjump, we are most definitely going to drop pings (if any)
* and lose all of our PD state. Instead of trying to remember all
* the states and deal with on-going transmission, let's send soft
* reset here and then disable PD communication until after sysjump
* is complete so that the communication starts over without dropping
* power.
*/
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; ++i)
if (pd_is_connected(i))
pd[i].flags |= PD_FLAGS_SFT_RST_DIS_COMM;
pd_soft_reset();
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
static void pd_store_src_cap(int port, int cnt, uint32_t *src_caps)
{
int i;
pd_src_cap_cnt[port] = cnt;
for (i = 0; i < cnt; i++)
pd_src_caps[port][i] = *src_caps++;
}
static void pd_send_request_msg(int port, int always_send_request)
{
uint32_t rdo, curr_limit, supply_voltage;
int res;
#ifdef CONFIG_CHARGE_MANAGER
int charging = (charge_manager_get_active_charge_port() == port);
#else
const int charging = 1;
#endif
#ifdef CONFIG_USB_PD_CHECK_MAX_REQUEST_ALLOWED
int max_request_allowed = pd_is_max_request_allowed();
#else
const int max_request_allowed = 1;
#endif
/* Clear new power request */
pd[port].new_power_request = 0;
/* Build and send request RDO */
/*
* If this port is not actively charging or we are not allowed to
* request the max voltage, then select vSafe5V
*/
res = pd_build_request(pd_src_cap_cnt[port], pd_src_caps[port],
&rdo, &curr_limit, &supply_voltage,
charging && max_request_allowed ?
PD_REQUEST_MAX : PD_REQUEST_VSAFE5V);
if (res != EC_SUCCESS)
/*
* If fail to choose voltage, do nothing, let source re-send
* source cap
*/
return;
/* Don't re-request the same voltage */
if (!always_send_request && pd[port].prev_request_mv == supply_voltage)
return;
CPRINTF("Req C%d [%d] %dmV %dmA", port, RDO_POS(rdo),
supply_voltage, curr_limit);
if (rdo & RDO_CAP_MISMATCH)
CPRINTF(" Mismatch");
CPRINTF("\n");
pd[port].curr_limit = curr_limit;
pd[port].supply_voltage = supply_voltage;
pd[port].prev_request_mv = supply_voltage;
res = send_request(port, rdo);
if (res >= 0)
set_state(port, PD_STATE_SNK_REQUESTED);
/* If fail send request, do nothing, let source re-send source cap */
}
#endif
static void pd_update_pdo_flags(int port, uint32_t pdo)
{
#ifdef CONFIG_CHARGE_MANAGER
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
int charge_whitelisted =
(pd[port].power_role == PD_ROLE_SINK &&
pd_charge_from_device(pd_get_identity_vid(port),
pd_get_identity_pid(port)));
#else
const int charge_whitelisted = 0;
#endif
#endif
/* can only parse PDO flags if type is fixed */
if ((pdo & PDO_TYPE_MASK) != PDO_TYPE_FIXED)
return;
#ifdef CONFIG_USB_PD_DUAL_ROLE
if (pdo & PDO_FIXED_DUAL_ROLE)
pd[port].flags |= PD_FLAGS_PARTNER_DR_POWER;
else
pd[port].flags &= ~PD_FLAGS_PARTNER_DR_POWER;
if (pdo & PDO_FIXED_EXTERNAL)
pd[port].flags |= PD_FLAGS_PARTNER_EXTPOWER;
else
pd[port].flags &= ~PD_FLAGS_PARTNER_EXTPOWER;
#endif
if (pdo & PDO_FIXED_DATA_SWAP)
pd[port].flags |= PD_FLAGS_PARTNER_DR_DATA;
else
pd[port].flags &= ~PD_FLAGS_PARTNER_DR_DATA;
#ifdef CONFIG_CHARGE_MANAGER
/*
* Treat device as a dedicated charger (meaning we should charge
* from it) if it does not support power swap, or if it is externally
* powered, or if we are a sink and the device identity matches a
* charging white-list.
*/
if (!(pd[port].flags & PD_FLAGS_PARTNER_DR_POWER) ||
(pd[port].flags & PD_FLAGS_PARTNER_EXTPOWER) ||
charge_whitelisted)
charge_manager_update_dualrole(port, CAP_DEDICATED);
else
charge_manager_update_dualrole(port, CAP_DUALROLE);
#endif
}
static void handle_data_request(int port, uint16_t head,
uint32_t *payload)
{
int type = PD_HEADER_TYPE(head);
int cnt = PD_HEADER_CNT(head);
switch (type) {
#ifdef CONFIG_USB_PD_DUAL_ROLE
case PD_DATA_SOURCE_CAP:
if ((pd[port].task_state == PD_STATE_SNK_DISCOVERY)
|| (pd[port].task_state == PD_STATE_SNK_TRANSITION)
#ifdef CONFIG_USB_PD_NO_VBUS_DETECT
|| (pd[port].task_state ==
PD_STATE_SNK_HARD_RESET_RECOVER)
#endif
|| (pd[port].task_state == PD_STATE_SNK_READY)) {
/* Port partner is now known to be PD capable */
pd[port].flags |= PD_FLAGS_PREVIOUS_PD_CONN;
pd_store_src_cap(port, cnt, payload);
/* src cap 0 should be fixed PDO */
pd_update_pdo_flags(port, payload[0]);
pd_process_source_cap(port, pd_src_cap_cnt[port],
pd_src_caps[port]);
pd_send_request_msg(port, 1);
}
break;
#endif /* CONFIG_USB_PD_DUAL_ROLE */
case PD_DATA_REQUEST:
if ((pd[port].power_role == PD_ROLE_SOURCE) && (cnt == 1))
if (!pd_check_requested_voltage(payload[0])) {
if (send_control(port, PD_CTRL_ACCEPT) < 0)
/*
* if we fail to send accept, do
* nothing and let sink timeout and
* send hard reset
*/
return;
/* explicit contract is now in place */
pd[port].flags |= PD_FLAGS_EXPLICIT_CONTRACT;
pd[port].requested_idx = payload[0] >> 28;
set_state(port, PD_STATE_SRC_ACCEPTED);
return;
}
/* the message was incorrect or cannot be satisfied */
send_control(port, PD_CTRL_REJECT);
/* keep last contract in place (whether implicit or explicit) */
set_state(port, PD_STATE_SRC_READY);
break;
case PD_DATA_BIST:
/* If not in READY state, then don't start BIST */
if (DUAL_ROLE_IF_ELSE(port,
pd[port].task_state == PD_STATE_SNK_READY,
pd[port].task_state == PD_STATE_SRC_READY)) {
/* currently only support sending bist carrier mode 2 */
if ((payload[0] >> 28) == 5) {
/* bist data object mode is 2 */
pd_transmit(port, TRANSMIT_BIST_MODE_2, 0,
NULL);
/* Set to appropriate port disconnected state */
set_state(port, DUAL_ROLE_IF_ELSE(port,
PD_STATE_SNK_DISCONNECTED,
PD_STATE_SRC_DISCONNECTED));
}
}
break;
case PD_DATA_SINK_CAP:
pd[port].flags |= PD_FLAGS_SNK_CAP_RECVD;
/* snk cap 0 should be fixed PDO */
pd_update_pdo_flags(port, payload[0]);
if (pd[port].task_state == PD_STATE_SRC_GET_SINK_CAP)
set_state(port, PD_STATE_SRC_READY);
break;
case PD_DATA_VENDOR_DEF:
handle_vdm_request(port, cnt, payload);
break;
default:
CPRINTF("Unhandled data message type %d\n", type);
}
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
void pd_request_power_swap(int port)
{
if (pd[port].task_state == PD_STATE_SRC_READY)
set_state(port, PD_STATE_SRC_SWAP_INIT);
else if (pd[port].task_state == PD_STATE_SNK_READY)
set_state(port, PD_STATE_SNK_SWAP_INIT);
task_wake(PD_PORT_TO_TASK_ID(port));
}
#endif
void pd_request_data_swap(int port)
{
if (DUAL_ROLE_IF_ELSE(port,
pd[port].task_state == PD_STATE_SNK_READY,
pd[port].task_state == PD_STATE_SRC_READY))
set_state(port, PD_STATE_DR_SWAP);
task_wake(PD_PORT_TO_TASK_ID(port));
}
static void pd_set_data_role(int port, int role)
{
pd[port].data_role = role;
pd_execute_data_swap(port, role);
#ifdef CONFIG_USBC_SS_MUX
#ifdef CONFIG_USBC_SS_MUX_DFP_ONLY
/*
* Need to connect SS mux for if new data role is DFP.
* If new data role is UFP, then disconnect the SS mux.
*/
if (role == PD_ROLE_DFP)
board_set_usb_mux(port, TYPEC_MUX_USB, USB_SWITCH_CONNECT,
pd[port].polarity);
else
board_set_usb_mux(port, TYPEC_MUX_NONE, USB_SWITCH_DISCONNECT,
pd[port].polarity);
#else
board_set_usb_mux(port, TYPEC_MUX_USB, USB_SWITCH_CONNECT,
pd[port].polarity);
#endif
#endif
pd_update_roles(port);
}
static void pd_dr_swap(int port)
{
pd_set_data_role(port, !pd[port].data_role);
pd[port].flags |= PD_FLAGS_DATA_SWAPPED;
}
static void handle_ctrl_request(int port, uint16_t head,
uint32_t *payload)
{
int type = PD_HEADER_TYPE(head);
int res;
switch (type) {
case PD_CTRL_GOOD_CRC:
/* should not get it */
break;
case PD_CTRL_PING:
/* Nothing else to do */
break;
case PD_CTRL_GET_SOURCE_CAP:
res = send_source_cap(port);
if ((res >= 0) &&
(pd[port].task_state == PD_STATE_SRC_DISCOVERY))
set_state(port, PD_STATE_SRC_NEGOCIATE);
break;
case PD_CTRL_GET_SINK_CAP:
#ifdef CONFIG_USB_PD_DUAL_ROLE
send_sink_cap(port);
#else
send_control(port, PD_CTRL_REJECT);
#endif
break;
#ifdef CONFIG_USB_PD_DUAL_ROLE
case PD_CTRL_GOTO_MIN:
break;
case PD_CTRL_PS_RDY:
if (pd[port].task_state == PD_STATE_SNK_SWAP_SRC_DISABLE) {
set_state(port, PD_STATE_SNK_SWAP_STANDBY);
} else if (pd[port].task_state == PD_STATE_SRC_SWAP_STANDBY) {
/* reset message ID and swap roles */
pd[port].msg_id = 0;
pd[port].power_role = PD_ROLE_SINK;
pd_update_roles(port);
set_state(port, PD_STATE_SNK_DISCOVERY);
#ifdef CONFIG_USBC_VCONN_SWAP
} else if (pd[port].task_state == PD_STATE_VCONN_SWAP_INIT) {
/*
* If VCONN is on, then this PS_RDY tells us it's
* ok to turn VCONN off
*/
if (pd[port].flags & PD_FLAGS_VCONN_ON)
set_state(port, PD_STATE_VCONN_SWAP_READY);
#endif
} else if (pd[port].task_state == PD_STATE_SNK_DISCOVERY) {
/* Don't know what power source is ready. Reset. */
set_state(port, PD_STATE_HARD_RESET_SEND);
} else if (pd[port].task_state == PD_STATE_SNK_SWAP_STANDBY) {
/* Do nothing, assume this is a redundant PD_RDY */
} else if (pd[port].power_role == PD_ROLE_SINK) {
set_state(port, PD_STATE_SNK_READY);
#ifdef CONFIG_CHARGE_MANAGER
/* Set ceiling based on what's negotiated */
charge_manager_set_ceil(port, pd[port].curr_limit);
#else
pd_set_input_current_limit(port, pd[port].curr_limit,
pd[port].supply_voltage);
#endif
}
break;
#endif
case PD_CTRL_REJECT:
case PD_CTRL_WAIT:
if (pd[port].task_state == PD_STATE_DR_SWAP)
set_state(port, READY_RETURN_STATE(port));
#ifdef CONFIG_USBC_VCONN_SWAP
else if (pd[port].task_state == PD_STATE_VCONN_SWAP_SEND)
set_state(port, READY_RETURN_STATE(port));
#endif
#ifdef CONFIG_USB_PD_DUAL_ROLE
else if (pd[port].task_state == PD_STATE_SRC_SWAP_INIT)
set_state(port, PD_STATE_SRC_READY);
else if (pd[port].task_state == PD_STATE_SNK_SWAP_INIT)
set_state(port, PD_STATE_SNK_READY);
else if (pd[port].task_state == PD_STATE_SNK_REQUESTED)
/* no explicit contract */
set_state(port, PD_STATE_SNK_READY);
#endif
break;
case PD_CTRL_ACCEPT:
if (pd[port].task_state == PD_STATE_SOFT_RESET) {
execute_soft_reset(port);
} else if (pd[port].task_state == PD_STATE_DR_SWAP) {
/* switch data role */
pd_dr_swap(port);
set_state(port, READY_RETURN_STATE(port));
#ifdef CONFIG_USB_PD_DUAL_ROLE
#ifdef CONFIG_USBC_VCONN_SWAP
} else if (pd[port].task_state == PD_STATE_VCONN_SWAP_SEND) {
/* switch vconn */
set_state(port, PD_STATE_VCONN_SWAP_INIT);
#endif
} else if (pd[port].task_state == PD_STATE_SRC_SWAP_INIT) {
/* explicit contract goes away for power swap */
pd[port].flags &= ~PD_FLAGS_EXPLICIT_CONTRACT;
set_state(port, PD_STATE_SRC_SWAP_SNK_DISABLE);
} else if (pd[port].task_state == PD_STATE_SNK_SWAP_INIT) {
/* explicit contract goes away for power swap */
pd[port].flags &= ~PD_FLAGS_EXPLICIT_CONTRACT;
set_state(port, PD_STATE_SNK_SWAP_SNK_DISABLE);
} else if (pd[port].task_state == PD_STATE_SNK_REQUESTED) {
/* explicit contract is now in place */
pd[port].flags |= PD_FLAGS_EXPLICIT_CONTRACT;
set_state(port, PD_STATE_SNK_TRANSITION);
#endif
}
break;
case PD_CTRL_SOFT_RESET:
execute_soft_reset(port);
/* We are done, acknowledge with an Accept packet */
send_control(port, PD_CTRL_ACCEPT);
break;
case PD_CTRL_PR_SWAP:
#ifdef CONFIG_USB_PD_DUAL_ROLE
if (pd_check_power_swap(port)) {
send_control(port, PD_CTRL_ACCEPT);
/*
* Clear flag for checking power role to avoid
* immediately requesting another swap.
*/
pd[port].flags &= ~PD_FLAGS_CHECK_PR_ROLE;
set_state(port,
DUAL_ROLE_IF_ELSE(port,
PD_STATE_SNK_SWAP_SNK_DISABLE,
PD_STATE_SRC_SWAP_SNK_DISABLE));
} else {
send_control(port, PD_CTRL_REJECT);
}
#else
send_control(port, PD_CTRL_REJECT);
#endif
break;
case PD_CTRL_DR_SWAP:
if (pd_check_data_swap(port, pd[port].data_role)) {
/*
* Accept switch and perform data swap. Clear
* flag for checking data role to avoid
* immediately requesting another swap.
*/
pd[port].flags &= ~PD_FLAGS_CHECK_DR_ROLE;
if (send_control(port, PD_CTRL_ACCEPT) >= 0)
pd_dr_swap(port);
} else {
send_control(port, PD_CTRL_REJECT);
}
break;
case PD_CTRL_VCONN_SWAP:
#ifdef CONFIG_USBC_VCONN_SWAP
if (pd[port].task_state == PD_STATE_SRC_READY ||
pd[port].task_state == PD_STATE_SNK_READY) {
if (pd_check_vconn_swap(port)) {
if (send_control(port, PD_CTRL_ACCEPT) > 0)
set_state(port,
PD_STATE_VCONN_SWAP_INIT);
} else {
send_control(port, PD_CTRL_REJECT);
}
}
#else
send_control(port, PD_CTRL_REJECT);
#endif
break;
default:
CPRINTF("Unhandled ctrl message type %d\n", type);
}
}
static void handle_request(int port, uint16_t head,
uint32_t *payload)
{
int cnt = PD_HEADER_CNT(head);
int p;
/* dump received packet content (only dump ping at debug level 2) */
if ((debug_level == 1 && PD_HEADER_TYPE(head) != PD_CTRL_PING) ||
debug_level >= 2) {
CPRINTF("RECV %04x/%d ", head, cnt);
for (p = 0; p < cnt; p++)
CPRINTF("[%d]%08x ", p, payload[p]);
CPRINTF("\n");
}
/*
* If we are in disconnected state, we shouldn't get a request. Do
* a hard reset if we get one.
*/
if (!pd_is_connected(port))
set_state(port, PD_STATE_HARD_RESET_SEND);
if (cnt)
handle_data_request(port, head, payload);
else
handle_ctrl_request(port, head, payload);
}
void pd_send_vdm(int port, uint32_t vid, int cmd, const uint32_t *data,
int count)
{
if (count > VDO_MAX_SIZE - 1) {
CPRINTF("VDM over max size\n");
return;
}
/* set VDM header with VID & CMD */
pd[port].vdo_data[0] = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
1 : (PD_VDO_CMD(cmd) < CMD_ATTENTION), cmd);
queue_vdm(port, pd[port].vdo_data, data, count);
task_wake(PD_PORT_TO_TASK_ID(port));
}
static inline int pdo_busy(int port)
{
/*
* Note, main PDO state machine (pd_task) uses READY state exclusively
* to denote port partners have successfully negociated a contract. All
* other protocol actions force state transitions.
*/
int rv = (pd[port].task_state != PD_STATE_SRC_READY);
#ifdef CONFIG_USB_PD_DUAL_ROLE
rv &= (pd[port].task_state != PD_STATE_SNK_READY);
#endif
return rv;
}
static uint64_t vdm_get_ready_timeout(uint32_t vdm_hdr)
{
uint64_t timeout;
int cmd = PD_VDO_CMD(vdm_hdr);
/* its not a structured VDM command */
if (!PD_VDO_SVDM(vdm_hdr))
return 500*MSEC;
switch (PD_VDO_CMDT(vdm_hdr)) {
case CMDT_INIT:
if ((cmd == CMD_ENTER_MODE) || (cmd == CMD_EXIT_MODE))
timeout = PD_T_VDM_WAIT_MODE_E;
else
timeout = PD_T_VDM_SNDR_RSP;
break;
default:
if ((cmd == CMD_ENTER_MODE) || (cmd == CMD_EXIT_MODE))
timeout = PD_T_VDM_E_MODE;
else
timeout = PD_T_VDM_RCVR_RSP;
break;
}
return timeout;
}
static void pd_vdm_send_state_machine(int port)
{
int res;
uint16_t header;
switch (pd[port].vdm_state) {
case VDM_STATE_READY:
/* Only transmit VDM if connected. */
if (!pd_is_connected(port)) {
pd[port].vdm_state = VDM_STATE_ERR_BUSY;
break;
}
/*
* if there's traffic or we're not in PDO ready state don't send
* a VDM.
*/
if (pdo_busy(port))
break;
/* Prepare and send VDM */
header = PD_HEADER(PD_DATA_VENDOR_DEF, pd[port].power_role,
pd[port].data_role, pd[port].msg_id,
(int)pd[port].vdo_count);
res = pd_transmit(port, TRANSMIT_SOP, header,
pd[port].vdo_data);
if (res < 0) {
pd[port].vdm_state = VDM_STATE_ERR_SEND;
} else {
pd[port].vdm_state = VDM_STATE_BUSY;
pd[port].vdm_timeout.val = get_time().val +
vdm_get_ready_timeout(pd[port].vdo_data[0]);
}
break;
case VDM_STATE_WAIT_RSP_BUSY:
/* wait and then initiate request again */
if (get_time().val > pd[port].vdm_timeout.val) {
pd[port].vdo_data[0] = pd[port].vdo_retry;
pd[port].vdo_count = 1;
pd[port].vdm_state = VDM_STATE_READY;
}
break;
case VDM_STATE_BUSY:
/* Wait for VDM response or timeout */
if (pd[port].vdm_timeout.val &&
(get_time().val > pd[port].vdm_timeout.val)) {
pd[port].vdm_state = VDM_STATE_ERR_TMOUT;
}
break;
default:
break;
}
}
#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 */
int pd_dev_store_rw_hash(int port, uint16_t dev_id, uint32_t *rw_hash,
uint32_t current_image)
{
#ifdef CONFIG_COMMON_RUNTIME
int i;
#endif
pd[port].dev_id = dev_id;
memcpy(pd[port].dev_rw_hash, rw_hash, PD_RW_HASH_SIZE);
#ifdef CONFIG_CMD_PD_DEV_DUMP_INFO
if (debug_level >= 1)
pd_dev_dump_info(dev_id, (uint8_t *)rw_hash);
#endif
pd[port].current_image = current_image;
#ifdef CONFIG_COMMON_RUNTIME
/* 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);
#endif
return 0;
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
enum pd_dual_role_states pd_get_dual_role(void)
{
return drp_state;
}
void pd_set_dual_role(enum pd_dual_role_states state)
{
int i;
drp_state = state;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
/*
* Change to sink if port is currently a source AND (new DRP
* state is force sink OR new DRP state is toggle off and we
* are in the source disconnected state).
*/
if (pd[i].power_role == PD_ROLE_SOURCE &&
(drp_state == PD_DRP_FORCE_SINK ||
(drp_state == PD_DRP_TOGGLE_OFF
&& pd[i].task_state == PD_STATE_SRC_DISCONNECTED))) {
pd[i].power_role = PD_ROLE_SINK;
set_state(i, PD_STATE_SNK_DISCONNECTED);
tcpm_set_cc(i, TYPEC_CC_RD);
task_wake(PD_PORT_TO_TASK_ID(i));
}
/*
* Change to source if port is currently a sink and the
* new DRP state is force source.
*/
if (pd[i].power_role == PD_ROLE_SINK &&
drp_state == PD_DRP_FORCE_SOURCE) {
pd[i].power_role = PD_ROLE_SOURCE;
set_state(i, PD_STATE_SRC_DISCONNECTED);
tcpm_set_cc(i, TYPEC_CC_RP);
task_wake(PD_PORT_TO_TASK_ID(i));
}
}
}
int pd_get_role(int port)
{
return pd[port].power_role;
}
static int pd_is_power_swapping(int port)
{
/* return true if in the act of swapping power roles */
return pd[port].task_state == PD_STATE_SNK_SWAP_SNK_DISABLE ||
pd[port].task_state == PD_STATE_SNK_SWAP_SRC_DISABLE ||
pd[port].task_state == PD_STATE_SNK_SWAP_STANDBY ||
pd[port].task_state == PD_STATE_SNK_SWAP_COMPLETE ||
pd[port].task_state == PD_STATE_SRC_SWAP_SNK_DISABLE ||
pd[port].task_state == PD_STATE_SRC_SWAP_SRC_DISABLE ||
pd[port].task_state == PD_STATE_SRC_SWAP_STANDBY;
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */
int pd_get_polarity(int port)
{
return pd[port].polarity;
}
int pd_get_partner_data_swap_capable(int port)
{
/* return data swap capable status of port partner */
return pd[port].flags & PD_FLAGS_PARTNER_DR_DATA;
}
#ifdef CONFIG_COMMON_RUNTIME
void pd_comm_enable(int enable)
{
int i;
pd_comm_enabled = enable;
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
/* If type-C connection, then update the TCPC RX enable */
if (pd_is_connected(i))
tcpm_set_rx_enable(i, enable);
#ifdef CONFIG_USB_PD_DUAL_ROLE
/*
* If communications are enabled, start hard reset timer for
* any port in PD_SNK_DISCOVERY.
*/
if (enable && pd[i].task_state == PD_STATE_SNK_DISCOVERY)
set_state_timeout(i,
get_time().val + PD_T_SINK_WAIT_CAP,
PD_STATE_HARD_RESET_SEND);
#endif
}
}
#endif
void pd_ping_enable(int port, int enable)
{
if (enable)
pd[port].flags |= PD_FLAGS_PING_ENABLED;
else
pd[port].flags &= ~PD_FLAGS_PING_ENABLED;
}
#ifdef CONFIG_CHARGE_MANAGER
/**
* Returns type C current limit (mA) based upon cc_voltage (mV).
*/
static inline int get_typec_current_limit(int cc)
{
int charge;
/* Detect type C charger current limit based upon vbus voltage. */
if (cc == TYPEC_CC_VOLT_SNK_3_0)
charge = 3000;
else if (cc == TYPEC_CC_VOLT_SNK_1_5)
charge = 1500;
else
charge = 0;
return charge;
}
/**
* Signal power request to indicate a charger update that affects the port.
*/
void pd_set_new_power_request(int port)
{
pd[port].new_power_request = 1;
task_wake(PD_PORT_TO_TASK_ID(port));
}
#endif /* CONFIG_CHARGE_MANAGER */
#if defined(CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP) && defined(CONFIG_USBC_SS_MUX)
/*
* Backwards compatible DFP does not support USB SS because it applies VBUS
* before debouncing CC and setting USB SS muxes, but SS detection will fail
* before we are done debouncing CC.
*/
#error "Backwards compatible DFP does not support USB"
#endif
void pd_task(void)
{
int head;
int port = TASK_ID_TO_PD_PORT(task_get_current());
uint32_t payload[7];
int timeout = 10*MSEC;
int cc1, cc2;
int res, incoming_packet = 0;
int hard_reset_count = 0;
#ifdef CONFIG_USB_PD_DUAL_ROLE
uint64_t next_role_swap = PD_T_DRP_SNK;
#ifndef CONFIG_USB_PD_NO_VBUS_DETECT
int snk_hard_reset_vbus_off = 0;
#endif
#ifdef CONFIG_CHARGE_MANAGER
int typec_curr = 0, typec_curr_change = 0;
#endif /* CONFIG_CHARGE_MANAGER */
#endif /* CONFIG_USB_PD_DUAL_ROLE */
enum pd_states this_state;
enum pd_cc_states new_cc_state;
timestamp_t now;
int caps_count = 0, hard_reset_sent = 0;
int evt;
/* Ensure the power supply is in the default state */
pd_power_supply_reset(port);
#ifdef CONFIG_USB_PD_TCPC
/* Initialize port controller */
tcpc_init(port);
#endif
/* Disable TCPC RX until connection is established */
tcpm_set_rx_enable(port, 0);
/* Initialize PD protocol state variables for each port. */
pd[port].power_role = PD_ROLE_DEFAULT;
pd[port].vdm_state = VDM_STATE_DONE;
pd[port].flags = 0;
set_state(port, PD_DEFAULT_STATE);
tcpm_set_cc(port, PD_ROLE_DEFAULT == PD_ROLE_SOURCE ? TYPEC_CC_RP :
TYPEC_CC_RD);
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
/* Initialize PD Policy engine */
pd_dfp_pe_init(port);
#endif
#ifdef 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);
#endif
while (1) {
/* process VDM messages last */
pd_vdm_send_state_machine(port);
/* Verify board specific health status : current, voltages... */
res = pd_board_checks();
if (res != EC_SUCCESS) {
/* cut the power */
execute_hard_reset(port);
/* notify the other side of the issue */
pd_transmit(port, TRANSMIT_HARD_RESET, 0, NULL);
}
/* wait for next event/packet or timeout expiration */
evt = task_wait_event(timeout);
#ifdef CONFIG_USB_PD_TCPC
/*
* run port controller task to check CC and/or read incoming
* messages
*/
tcpc_run(port, evt);
#endif
/* process any potential incoming message */
incoming_packet = evt & PD_EVENT_RX;
if (incoming_packet) {
tcpm_get_message(port, payload, &head);
if (head > 0)
handle_request(port, head, payload);
}
/* if nothing to do, verify the state of the world in 500ms */
this_state = pd[port].task_state;
timeout = 500*MSEC;
switch (this_state) {
case PD_STATE_DISABLED:
/* Nothing to do */
break;
case PD_STATE_SRC_DISCONNECTED:
timeout = 10*MSEC;
tcpm_get_cc(port, &cc1, &cc2);
/* Vnc monitoring */
if ((TYPEC_CC_IS_RD(cc1) ||
TYPEC_CC_IS_RD(cc2)) ||
(cc1 == TYPEC_CC_VOLT_RA &&
cc2 == TYPEC_CC_VOLT_RA)) {
#ifdef CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP
/* Enable VBUS */
if (pd_set_power_supply_ready(port))
break;
#endif
pd[port].cc_state = PD_CC_NONE;
set_state(port,
PD_STATE_SRC_DISCONNECTED_DEBOUNCE);
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
/* Swap roles if time expired */
else if (drp_state != PD_DRP_FORCE_SOURCE &&
get_time().val >= next_role_swap) {
pd[port].power_role = PD_ROLE_SINK;
set_state(port, PD_STATE_SNK_DISCONNECTED);
tcpm_set_cc(port, TYPEC_CC_RD);
next_role_swap = get_time().val + PD_T_DRP_SNK;
/* Swap states quickly */
timeout = 2*MSEC;
}
#endif
break;
case PD_STATE_SRC_DISCONNECTED_DEBOUNCE:
timeout = 20*MSEC;
tcpm_get_cc(port, &cc1, &cc2);
if (TYPEC_CC_IS_RD(cc1) && TYPEC_CC_IS_RD(cc2)) {
/* Debug accessory */
new_cc_state = PD_CC_DEBUG_ACC;
} else if (TYPEC_CC_IS_RD(cc1) ||
TYPEC_CC_IS_RD(cc2)) {
/* UFP attached */
new_cc_state = PD_CC_UFP_ATTACHED;
} else if (cc1 == TYPEC_CC_VOLT_RA &&
cc2 == TYPEC_CC_VOLT_RA) {
/* Audio accessory */
new_cc_state = PD_CC_AUDIO_ACC;
} else {
/* No UFP */
#ifdef CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP
/* No connection any more, remove VBUS */
pd_power_supply_reset(port);
#endif
set_state(port, PD_STATE_SRC_DISCONNECTED);
timeout = 5*MSEC;
break;
}
/* Debounce the cc state */
if (new_cc_state != pd[port].cc_state) {
pd[port].cc_debounce = get_time().val +
PD_T_CC_DEBOUNCE;
pd[port].cc_state = new_cc_state;
break;
} else if (get_time().val < pd[port].cc_debounce) {
break;
}
/* Debounce complete */
/* UFP is attached */
if (new_cc_state == PD_CC_UFP_ATTACHED) {
pd[port].polarity = (TYPEC_CC_IS_RD(cc2));
tcpm_set_polarity(port, pd[port].polarity);
/* initial data role for source is DFP */
pd_set_data_role(port, PD_ROLE_DFP);
#ifndef CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP
/* Enable VBUS */
if (pd_set_power_supply_ready(port)) {
#ifdef CONFIG_USBC_SS_MUX
board_set_usb_mux(port, TYPEC_MUX_NONE,
USB_SWITCH_DISCONNECT,
pd[port].polarity);
#endif
break;
}
#endif
/* If PD comm is enabled, enable TCPC RX */
if (pd_comm_enabled)
tcpm_set_rx_enable(port, 1);
#ifdef CONFIG_USBC_VCONN
tcpm_set_vconn(port, 1);
pd[port].flags |= PD_FLAGS_VCONN_ON;
#endif
pd[port].flags |= PD_FLAGS_CHECK_PR_ROLE |
PD_FLAGS_CHECK_DR_ROLE;
hard_reset_count = 0;
timeout = 5*MSEC;
set_state(port, PD_STATE_SRC_STARTUP);
}
/* Accessory is attached */
else if (new_cc_state == PD_CC_AUDIO_ACC ||
new_cc_state == PD_CC_DEBUG_ACC) {
#ifdef CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP
/* Remove VBUS */
pd_power_supply_reset(port);
#endif
#ifdef CONFIG_USBC_SS_MUX
board_set_usb_mux(port, TYPEC_MUX_USB,
USB_SWITCH_CONNECT,
pd[port].polarity);
#endif
#ifdef CONFIG_CASE_CLOSED_DEBUG
if (new_cc_state == PD_CC_DEBUG_ACC)
ccd_set_mode(CCD_MODE_ENABLED);
#endif
set_state(port, PD_STATE_SRC_ACCESSORY);
}
break;
case PD_STATE_SRC_ACCESSORY:
/* Combined audio / debug accessory state */
timeout = 100*MSEC;
tcpm_get_cc(port, &cc1, &cc2);
/* If accessory becomes detached */
if ((pd[port].cc_state == PD_CC_AUDIO_ACC &&
(cc1 != TYPEC_CC_VOLT_RA ||
cc2 != TYPEC_CC_VOLT_RA)) ||
(pd[port].cc_state == PD_CC_DEBUG_ACC &&
(!TYPEC_CC_IS_RD(cc1) ||
!TYPEC_CC_IS_RD(cc2)))) {
set_state(port, PD_STATE_SRC_DISCONNECTED);
#ifdef CONFIG_CASE_CLOSED_DEBUG
ccd_set_mode(CCD_MODE_DISABLED);
#endif
timeout = 10*MSEC;
}
break;
case PD_STATE_SRC_HARD_RESET_RECOVER:
/* Do not continue until hard reset recovery time */
if (get_time().val < pd[port].src_recover) {
timeout = 50*MSEC;
break;
}
/* Enable VBUS */
timeout = 10*MSEC;
if (pd_set_power_supply_ready(port)) {
set_state(port, PD_STATE_SRC_DISCONNECTED);
break;
}
set_state(port, PD_STATE_SRC_STARTUP);
break;
case PD_STATE_SRC_STARTUP:
/* Wait for power source to enable */
if (pd[port].last_state != pd[port].task_state) {
/*
* fake set data role swapped flag so we send
* discover identity when we enter SRC_READY
*/
pd[port].flags |= PD_FLAGS_DATA_SWAPPED;
/* reset various counters */
caps_count = 0;
pd[port].msg_id = 0;
set_state_timeout(
port,
#ifdef CONFIG_USBC_BACKWARDS_COMPATIBLE_DFP
/*
* delay for power supply to start up.
* subtract out debounce time if coming
* from debounce state since vbus is
* on during debounce.
*/
get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY -
(pd[port].last_state ==
PD_STATE_SRC_DISCONNECTED_DEBOUNCE
? PD_T_CC_DEBOUNCE : 0),
#else
get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY,
#endif
PD_STATE_SRC_DISCOVERY);
}
break;
case PD_STATE_SRC_DISCOVERY:
if (pd[port].last_state != pd[port].task_state) {
/*
* If we have had PD connection with this port
* partner, then start NoResponseTimer.
*/
if (pd[port].flags & PD_FLAGS_PREVIOUS_PD_CONN)
set_state_timeout(port,
get_time().val +
PD_T_NO_RESPONSE,
hard_reset_count <
PD_HARD_RESET_COUNT ?
PD_STATE_HARD_RESET_SEND :
PD_STATE_SRC_DISCONNECTED);
}
/* Send source cap some minimum number of times */
if (caps_count < PD_CAPS_COUNT) {
/* Query capabilites of the other side */
res = send_source_cap(port);
/* packet was acked => PD capable device) */
if (res >= 0) {
set_state(port,
PD_STATE_SRC_NEGOCIATE);
timeout = 10*MSEC;
hard_reset_count = 0;
caps_count = 0;
/* Port partner is PD capable */
pd[port].flags |=
PD_FLAGS_PREVIOUS_PD_CONN;
} else { /* failed, retry later */
timeout = PD_T_SEND_SOURCE_CAP;
caps_count++;
}
}
break;
case PD_STATE_SRC_NEGOCIATE:
/* wait for a "Request" message */
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
PD_STATE_HARD_RESET_SEND);
break;
case PD_STATE_SRC_ACCEPTED:
/* Accept sent, wait for enabling the new voltage */
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(
port,
get_time().val +
PD_T_SINK_TRANSITION,
PD_STATE_SRC_POWERED);
break;
case PD_STATE_SRC_POWERED:
/* Switch to the new requested voltage */
if (pd[port].last_state != pd[port].task_state) {
pd_transition_voltage(pd[port].requested_idx);
set_state_timeout(
port,
get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY,
PD_STATE_SRC_TRANSITION);
}
break;
case PD_STATE_SRC_TRANSITION:
/* the voltage output is good, notify the source */
res = send_control(port, PD_CTRL_PS_RDY);
if (res >= 0) {
timeout = 10*MSEC;
/* it'a time to ping regularly the sink */
set_state(port, PD_STATE_SRC_READY);
} else {
/* The sink did not ack, cut the power... */
pd_power_supply_reset(port);
set_state(port, PD_STATE_SRC_DISCONNECTED);
}
break;
case PD_STATE_SRC_READY:
timeout = PD_T_SOURCE_ACTIVITY;
if (pd[port].last_state != pd[port].task_state)
pd[port].flags |= PD_FLAGS_GET_SNK_CAP_SENT;
/*
* Don't send any PD traffic if we woke up due to
* incoming packet or if VDO response pending to avoid
* collisions.
*/
if (incoming_packet ||
(pd[port].vdm_state == VDM_STATE_BUSY))
break;
/* Send get sink cap if haven't received it yet */
if ((pd[port].flags & PD_FLAGS_GET_SNK_CAP_SENT) &&
!(pd[port].flags & PD_FLAGS_SNK_CAP_RECVD)) {
/* Get sink cap to know if dual-role device */
send_control(port, PD_CTRL_GET_SINK_CAP);
set_state(port, PD_STATE_SRC_GET_SINK_CAP);
pd[port].flags &= ~PD_FLAGS_GET_SNK_CAP_SENT;
break;
}
/* Check power role policy, which may trigger a swap */
if (pd[port].flags & PD_FLAGS_CHECK_PR_ROLE) {
pd_check_pr_role(port, PD_ROLE_SOURCE,
pd[port].flags);
pd[port].flags &= ~PD_FLAGS_CHECK_PR_ROLE;
break;
}
/* Check data role policy, which may trigger a swap */
if (pd[port].flags & PD_FLAGS_CHECK_DR_ROLE) {
pd_check_dr_role(port, pd[port].data_role,
pd[port].flags);
pd[port].flags &= ~PD_FLAGS_CHECK_DR_ROLE;
break;
}
/* Send discovery SVDMs last */
if (pd[port].data_role == PD_ROLE_DFP &&
(pd[port].flags & PD_FLAGS_DATA_SWAPPED)) {
#ifndef CONFIG_USB_PD_SIMPLE_DFP
pd_send_vdm(port, USB_SID_PD,
CMD_DISCOVER_IDENT, NULL, 0);
#endif
pd[port].flags &= ~PD_FLAGS_DATA_SWAPPED;
break;
}
if (!(pd[port].flags & PD_FLAGS_PING_ENABLED))
break;
/* Verify that the sink is alive */
res = send_control(port, PD_CTRL_PING);
if (res >= 0)
break;
/* Ping dropped. Try soft reset. */
set_state(port, PD_STATE_SOFT_RESET);
timeout = 10 * MSEC;
break;
case PD_STATE_SRC_GET_SINK_CAP:
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
PD_STATE_SRC_READY);
break;
case PD_STATE_DR_SWAP:
if (pd[port].last_state != pd[port].task_state) {
res = send_control(port, PD_CTRL_DR_SWAP);
if (res < 0) {
timeout = 10*MSEC;
/*
* If failed to get goodCRC, send
* soft reset, otherwise ignore
* failure.
*/
set_state(port, res == -1 ?
PD_STATE_SOFT_RESET :
READY_RETURN_STATE(port));
break;
}
/* Wait for accept or reject */
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
READY_RETURN_STATE(port));
}
break;
#ifdef CONFIG_USB_PD_DUAL_ROLE
case PD_STATE_SRC_SWAP_INIT:
if (pd[port].last_state != pd[port].task_state) {
res = send_control(port, PD_CTRL_PR_SWAP);
if (res < 0) {
timeout = 10*MSEC;
/*
* If failed to get goodCRC, send
* soft reset, otherwise ignore
* failure.
*/
set_state(port, res == -1 ?
PD_STATE_SOFT_RESET :
PD_STATE_SRC_READY);
break;
}
/* Wait for accept or reject */
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
PD_STATE_SRC_READY);
}
break;
case PD_STATE_SRC_SWAP_SNK_DISABLE:
/* Give time for sink to stop drawing current */
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port,
get_time().val +
PD_T_SINK_TRANSITION,
PD_STATE_SRC_SWAP_SRC_DISABLE);
break;
case PD_STATE_SRC_SWAP_SRC_DISABLE:
/* Turn power off */
if (pd[port].last_state != pd[port].task_state) {
pd_power_supply_reset(port);
set_state_timeout(port,
get_time().val +
PD_POWER_SUPPLY_TURN_OFF_DELAY,
PD_STATE_SRC_SWAP_STANDBY);
}
break;
case PD_STATE_SRC_SWAP_STANDBY:
/* Send PS_RDY to let sink know our power is off */
if (pd[port].last_state != pd[port].task_state) {
/* Send PS_RDY */
res = send_control(port, PD_CTRL_PS_RDY);
if (res < 0) {
timeout = 10*MSEC;
set_state(port,
PD_STATE_SRC_DISCONNECTED);
break;
}
/* Switch to Rd and swap roles to sink */
tcpm_set_cc(port, TYPEC_CC_RD);
pd[port].power_role = PD_ROLE_SINK;
/* Wait for PS_RDY from new source */
set_state_timeout(port,
get_time().val +
PD_T_PS_SOURCE_ON,
PD_STATE_SNK_DISCONNECTED);
}
break;
case PD_STATE_SUSPENDED:
/*
* TODO: Suspend state only supported if we are also
* the TCPC.
*/
#ifdef CONFIG_USB_PD_TCPC
pd_rx_disable_monitoring(port);
pd_hw_release(port);
pd_power_supply_reset(port);
/* Wait for resume */
while (pd[port].task_state == PD_STATE_SUSPENDED)
task_wait_event(-1);
pd_hw_init(port, PD_ROLE_DEFAULT);
#endif
break;
case PD_STATE_SNK_DISCONNECTED:
timeout = 10*MSEC;
tcpm_get_cc(port, &cc1, &cc2);
/* Source connection monitoring */
if (cc1 != TYPEC_CC_VOLT_OPEN ||
cc2 != TYPEC_CC_VOLT_OPEN) {
pd[port].cc_state = PD_CC_NONE;
hard_reset_count = 0;
new_cc_state = PD_CC_DFP_ATTACHED;
pd[port].cc_debounce = get_time().val +
PD_T_CC_DEBOUNCE;
set_state(port,
PD_STATE_SNK_DISCONNECTED_DEBOUNCE);
break;
}
/*
* If no source detected, check for role toggle.
* Do not toggle if VBUS is present.
*/
if (drp_state == PD_DRP_TOGGLE_ON &&
get_time().val >= next_role_swap &&
!pd_snk_is_vbus_provided(port)) {
/* Swap roles to source */
pd[port].power_role = PD_ROLE_SOURCE;
set_state(port, PD_STATE_SRC_DISCONNECTED);
tcpm_set_cc(port, TYPEC_CC_RP);
next_role_swap = get_time().val + PD_T_DRP_SRC;
/* Swap states quickly */
timeout = 2*MSEC;
}
break;
case PD_STATE_SNK_DISCONNECTED_DEBOUNCE:
tcpm_get_cc(port, &cc1, &cc2);
if (cc1 == TYPEC_CC_VOLT_OPEN &&
cc2 == TYPEC_CC_VOLT_OPEN) {
/* No connection any more */
set_state(port, PD_STATE_SNK_DISCONNECTED);
timeout = 5*MSEC;
break;
}
timeout = 20*MSEC;
/* Wait for CC debounce and VBUS present */
if (get_time().val < pd[port].cc_debounce ||
!pd_snk_is_vbus_provided(port))
break;
/* We are attached */
pd[port].polarity = (cc2 != TYPEC_CC_VOLT_OPEN);
tcpm_set_polarity(port, pd[port].polarity);
/* reset message ID on connection */
pd[port].msg_id = 0;
/* initial data role for sink is UFP */
pd_set_data_role(port, PD_ROLE_UFP);
#ifdef CONFIG_CHARGE_MANAGER
typec_curr = get_typec_current_limit(
pd[port].polarity ? cc2 : cc1);
typec_set_input_current_limit(
port, typec_curr, TYPE_C_VOLTAGE);
#endif
/* If PD comm is enabled, enable TCPC RX */
if (pd_comm_enabled)
tcpm_set_rx_enable(port, 1);
/*
* fake set data role swapped flag so we send
* discover identity when we enter SRC_READY
*/
pd[port].flags |= PD_FLAGS_CHECK_PR_ROLE |
PD_FLAGS_CHECK_DR_ROLE |
PD_FLAGS_DATA_SWAPPED;
set_state(port, PD_STATE_SNK_DISCOVERY);
timeout = 10*MSEC;
hook_call_deferred(
pd_usb_billboard_deferred,
PD_T_AME);
break;
case PD_STATE_SNK_HARD_RESET_RECOVER:
if (pd[port].last_state != pd[port].task_state)
pd[port].flags |= PD_FLAGS_DATA_SWAPPED;
#ifdef CONFIG_USB_PD_NO_VBUS_DETECT
/*
* Can't measure vbus state so this is the maximum
* recovery time for the source.
*/
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port, get_time().val +
PD_T_SAFE_0V +
PD_T_SRC_RECOVER_MAX +
PD_T_SRC_TURN_ON,
PD_STATE_SNK_DISCONNECTED);
#else
/* Wait for VBUS to go low and then high*/
if (pd[port].last_state != pd[port].task_state) {
snk_hard_reset_vbus_off = 0;
set_state_timeout(port,
get_time().val +
PD_T_SAFE_0V,
hard_reset_count <
PD_HARD_RESET_COUNT ?
PD_STATE_HARD_RESET_SEND :
PD_STATE_SNK_DISCOVERY);
}
if (!pd_snk_is_vbus_provided(port) &&
!snk_hard_reset_vbus_off) {
/* VBUS has gone low, reset timeout */
snk_hard_reset_vbus_off = 1;
set_state_timeout(port,
get_time().val +
PD_T_SRC_RECOVER_MAX +
PD_T_SRC_TURN_ON,
PD_STATE_SNK_DISCONNECTED);
}
if (pd_snk_is_vbus_provided(port) &&
snk_hard_reset_vbus_off) {
/* VBUS went high again */
set_state(port, PD_STATE_SNK_DISCOVERY);
timeout = 10*MSEC;
}
/*
* Don't need to set timeout because VBUS changing
* will trigger an interrupt and wake us up.
*/
#endif
break;
case PD_STATE_SNK_DISCOVERY:
/* Wait for source cap expired only if we are enabled */
if ((pd[port].last_state != pd[port].task_state)
&& pd_comm_enabled) {
/*
* If we haven't passed hard reset counter,
* start SinkWaitCapTimer, otherwise start
* NoResponseTimer.
*/
if (hard_reset_count < PD_HARD_RESET_COUNT)
set_state_timeout(port,
get_time().val +
PD_T_SINK_WAIT_CAP,
PD_STATE_HARD_RESET_SEND);
else if (pd[port].flags &
PD_FLAGS_PREVIOUS_PD_CONN)
/* ErrorRecovery */
set_state_timeout(port,
get_time().val +
PD_T_NO_RESPONSE,
PD_STATE_SNK_DISCONNECTED);
#ifdef CONFIG_CHARGE_MANAGER
/*
* If we didn't come from disconnected, must
* have come from some path that did not set
* typec current limit. So, set to 0 so that
* we guarantee this is revised below.
*/
if (pd[port].last_state !=
PD_STATE_SNK_DISCONNECTED_DEBOUNCE)
typec_curr = 0;
#endif
}
#ifdef CONFIG_CHARGE_MANAGER
timeout = PD_T_SINK_ADJ - PD_T_DEBOUNCE;
/* Check if CC pull-up has changed */
tcpm_get_cc(port, &cc1, &cc2);
if (pd[port].polarity)
cc1 = cc2;
if (typec_curr != get_typec_current_limit(cc1)) {
/* debounce signal by requiring two reads */
if (typec_curr_change) {
/* set new input current limit */
typec_curr = get_typec_current_limit(
cc1);
typec_set_input_current_limit(
port, typec_curr, TYPE_C_VOLTAGE);
} else {
/* delay for debounce */
timeout = PD_T_DEBOUNCE;
}
typec_curr_change = !typec_curr_change;
} else {
typec_curr_change = 0;
}
#endif
break;
case PD_STATE_SNK_REQUESTED:
/* Wait for ACCEPT or REJECT */
if (pd[port].last_state != pd[port].task_state) {
hard_reset_count = 0;
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
PD_STATE_HARD_RESET_SEND);
}
break;
case PD_STATE_SNK_TRANSITION:
/* Wait for PS_RDY */
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port,
get_time().val +
PD_T_PS_TRANSITION,
PD_STATE_HARD_RESET_SEND);
break;
case PD_STATE_SNK_READY:
timeout = 20*MSEC;
/*
* Don't send any PD traffic if we woke up due to
* incoming packet or if VDO response pending to avoid
* collisions.
*/
if (incoming_packet ||
(pd[port].vdm_state == VDM_STATE_BUSY))
break;
/* Check for new power to request */
if (pd[port].new_power_request) {
pd_send_request_msg(port, 0);
break;
}
/* Check power role policy, which may trigger a swap */
if (pd[port].flags & PD_FLAGS_CHECK_PR_ROLE) {
pd_check_pr_role(port, PD_ROLE_SINK,
pd[port].flags);
pd[port].flags &= ~PD_FLAGS_CHECK_PR_ROLE;
break;
}
/* Check data role policy, which may trigger a swap */
if (pd[port].flags & PD_FLAGS_CHECK_DR_ROLE) {
pd_check_dr_role(port, pd[port].data_role,
pd[port].flags);
pd[port].flags &= ~PD_FLAGS_CHECK_DR_ROLE;
break;
}
/* If DFP, send discovery SVDMs */
if (pd[port].data_role == PD_ROLE_DFP &&
(pd[port].flags & PD_FLAGS_DATA_SWAPPED)) {
pd_send_vdm(port, USB_SID_PD,
CMD_DISCOVER_IDENT, NULL, 0);
pd[port].flags &= ~PD_FLAGS_DATA_SWAPPED;
break;
}
/* Sent all messages, don't need to wake very often */
timeout = 200*MSEC;
break;
case PD_STATE_SNK_SWAP_INIT:
if (pd[port].last_state != pd[port].task_state) {
res = send_control(port, PD_CTRL_PR_SWAP);
if (res < 0) {
timeout = 10*MSEC;
/*
* If failed to get goodCRC, send
* soft reset, otherwise ignore
* failure.
*/
set_state(port, res == -1 ?
PD_STATE_SOFT_RESET :
PD_STATE_SNK_READY);
break;
}
/* Wait for accept or reject */
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
PD_STATE_SNK_READY);
}
break;
case PD_STATE_SNK_SWAP_SNK_DISABLE:
/* Stop drawing power */
pd_set_input_current_limit(port, 0, 0);
#ifdef CONFIG_CHARGE_MANAGER
typec_set_input_current_limit(port, 0, 0);
charge_manager_set_ceil(port, CHARGE_CEIL_NONE);
#endif
set_state(port, PD_STATE_SNK_SWAP_SRC_DISABLE);
timeout = 10*MSEC;
break;
case PD_STATE_SNK_SWAP_SRC_DISABLE:
/* Wait for PS_RDY */
if (pd[port].last_state != pd[port].task_state)
set_state_timeout(port,
get_time().val +
PD_T_PS_SOURCE_OFF,
PD_STATE_HARD_RESET_SEND);
break;
case PD_STATE_SNK_SWAP_STANDBY:
if (pd[port].last_state != pd[port].task_state) {
/* Switch to Rp and enable power supply */
tcpm_set_cc(port, TYPEC_CC_RP);
if (pd_set_power_supply_ready(port)) {
/* Restore Rd */
tcpm_set_cc(port, TYPEC_CC_RD);
timeout = 10*MSEC;
set_state(port,
PD_STATE_SNK_DISCONNECTED);
break;
}
/* Wait for power supply to turn on */
set_state_timeout(
port,
get_time().val +
PD_POWER_SUPPLY_TURN_ON_DELAY,
PD_STATE_SNK_SWAP_COMPLETE);
}
break;
case PD_STATE_SNK_SWAP_COMPLETE:
/* Send PS_RDY and change to source role */
res = send_control(port, PD_CTRL_PS_RDY);
if (res < 0) {
/* Restore Rd */
tcpm_set_cc(port, TYPEC_CC_RD);
pd_power_supply_reset(port);
timeout = 10 * MSEC;
set_state(port, PD_STATE_SNK_DISCONNECTED);
break;
}
caps_count = 0;
pd[port].msg_id = 0;
pd[port].power_role = PD_ROLE_SOURCE;
pd_update_roles(port);
set_state(port, PD_STATE_SRC_DISCOVERY);
timeout = 10*MSEC;
break;
#ifdef CONFIG_USBC_VCONN_SWAP
case PD_STATE_VCONN_SWAP_SEND:
if (pd[port].last_state != pd[port].task_state) {
res = send_control(port, PD_CTRL_VCONN_SWAP);
if (res < 0) {
timeout = 10*MSEC;
/*
* If failed to get goodCRC, send
* soft reset, otherwise ignore
* failure.
*/
set_state(port, res == -1 ?
PD_STATE_SOFT_RESET :
READY_RETURN_STATE(port));
break;
}
/* Wait for accept or reject */
set_state_timeout(port,
get_time().val +
PD_T_SENDER_RESPONSE,
READY_RETURN_STATE(port));
}
break;
case PD_STATE_VCONN_SWAP_INIT:
if (pd[port].last_state != pd[port].task_state) {
if (!(pd[port].flags & PD_FLAGS_VCONN_ON)) {
/* Turn VCONN on and wait for it */
tcpm_set_vconn(port, 1);
set_state_timeout(port,
get_time().val + PD_VCONN_SWAP_DELAY,
PD_STATE_VCONN_SWAP_READY);
} else {
set_state_timeout(port,
get_time().val + PD_T_VCONN_SOURCE_ON,
READY_RETURN_STATE(port));
}
}
break;
case PD_STATE_VCONN_SWAP_READY:
if (pd[port].last_state != pd[port].task_state) {
if (!(pd[port].flags & PD_FLAGS_VCONN_ON)) {
/* VCONN is now on, send PS_RDY */
pd[port].flags |= PD_FLAGS_VCONN_ON;
res = send_control(port,
PD_CTRL_PS_RDY);
if (res == -1) {
timeout = 10*MSEC;
/*
* If failed to get goodCRC,
* send soft reset
*/
set_state(port,
PD_STATE_SOFT_RESET);
break;
}
set_state(port,
READY_RETURN_STATE(port));
} else {
/* Turn VCONN off and wait for it */
tcpm_set_vconn(port, 0);
pd[port].flags &= ~PD_FLAGS_VCONN_ON;
set_state_timeout(port,
get_time().val + PD_VCONN_SWAP_DELAY,
READY_RETURN_STATE(port));
}
}
break;
#endif /* CONFIG_USBC_VCONN_SWAP */
#endif /* CONFIG_USB_PD_DUAL_ROLE */
case PD_STATE_SOFT_RESET:
if (pd[port].last_state != pd[port].task_state) {
res = send_control(port, PD_CTRL_SOFT_RESET);
/* if soft reset failed, try hard reset. */
if (res < 0) {
set_state(port,
PD_STATE_HARD_RESET_SEND);
timeout = 5*MSEC;
break;
}
set_state_timeout(
port,
get_time().val + PD_T_SENDER_RESPONSE,
PD_STATE_HARD_RESET_SEND);
}
break;
case PD_STATE_HARD_RESET_SEND:
hard_reset_count++;
if (pd[port].last_state != pd[port].task_state)
hard_reset_sent = 0;
#ifdef CONFIG_CHARGE_MANAGER
if (pd[port].last_state == PD_STATE_SNK_DISCOVERY) {
/*
* If discovery timed out, assume that we
* have a dedicated charger attached. This
* may not be a correct assumption according
* to the specification, but it generally
* works in practice and the harmful
* effects of a wrong assumption here
* are minimal.
*/
charge_manager_update_dualrole(port,
CAP_DEDICATED);
}
#endif
/* try sending hard reset until it succeeds */
if (!hard_reset_sent) {
if (pd_transmit(port, TRANSMIT_HARD_RESET,
0, NULL) < 0) {
timeout = 10*MSEC;
break;
}
/* successfully sent hard reset */
hard_reset_sent = 1;
/*
* If we are source, delay before cutting power
* to allow sink time to get hard reset.
*/
if (pd[port].power_role == PD_ROLE_SOURCE) {
set_state_timeout(port,
get_time().val + PD_T_PS_HARD_RESET,
PD_STATE_HARD_RESET_EXECUTE);
} else {
set_state(port,
PD_STATE_HARD_RESET_EXECUTE);
timeout = 10*MSEC;
}
}
break;
case PD_STATE_HARD_RESET_EXECUTE:
#ifdef CONFIG_USB_PD_DUAL_ROLE
/*
* If hard reset while in the last stages of power
* swap, then we need to restore our CC resistor.
*/
if (pd[port].last_state == PD_STATE_SNK_SWAP_STANDBY)
tcpm_set_cc(port, TYPEC_CC_RD);
#endif
/* reset our own state machine */
execute_hard_reset(port);
timeout = 10*MSEC;
break;
#ifdef CONFIG_COMMON_RUNTIME
case PD_STATE_BIST_RX:
send_bist_cmd(port);
/* Delay at least enough for partner to finish BIST */
timeout = PD_T_BIST_RECEIVE + 20*MSEC;
/* Set to appropriate port disconnected state */
set_state(port, DUAL_ROLE_IF_ELSE(port,
PD_STATE_SNK_DISCONNECTED,
PD_STATE_SRC_DISCONNECTED));
break;
case PD_STATE_BIST_TX:
pd_transmit(port, TRANSMIT_BIST_MODE_2, 0, NULL);
/* Delay at least enough to finish sending BIST */
timeout = PD_T_BIST_TRANSMIT + 20*MSEC;
/* Set to appropriate port disconnected state */
set_state(port, DUAL_ROLE_IF_ELSE(port,
PD_STATE_SNK_DISCONNECTED,
PD_STATE_SRC_DISCONNECTED));
break;
#endif
default:
break;
}
pd[port].last_state = this_state;
/*
* Check for state timeout, and if not check if need to adjust
* timeout value to wake up on the next state timeout.
*/
now = get_time();
if (pd[port].timeout) {
if (now.val >= pd[port].timeout) {
set_state(port, pd[port].timeout_state);
/* On a state timeout, run next state soon */
timeout = timeout < 10*MSEC ? timeout : 10*MSEC;
} else if (pd[port].timeout - now.val < timeout) {
timeout = pd[port].timeout - now.val;
}
}
/* Check for disconnection */
#ifdef CONFIG_USB_PD_DUAL_ROLE
if (!pd_is_connected(port) || pd_is_power_swapping(port))
continue;
#endif
if (pd[port].power_role == PD_ROLE_SOURCE) {
/* Source: detect disconnect by monitoring CC */
tcpm_get_cc(port, &cc1, &cc2);
if (pd[port].polarity)
cc1 = cc2;
if (cc1 == TYPEC_CC_VOLT_OPEN) {
pd_power_supply_reset(port);
set_state(port, PD_STATE_SRC_DISCONNECTED);
/* Debouncing */
timeout = 10*MSEC;
}
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
/*
* Sink disconnect if VBUS is low and we are not recovering
* a hard reset.
*/
if (pd[port].power_role == PD_ROLE_SINK &&
!pd_snk_is_vbus_provided(port) &&
pd[port].task_state != PD_STATE_SNK_HARD_RESET_RECOVER &&
pd[port].task_state != PD_STATE_HARD_RESET_EXECUTE) {
/* Sink: detect disconnect by monitoring VBUS */
set_state(port, PD_STATE_SNK_DISCONNECTED);
/* set timeout small to reconnect fast */
timeout = 5*MSEC;
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */
}
}
void tcpc_alert(void)
{
int status, i;
/* loop over ports and check alert status */
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
tcpm_alert_status(i, TCPC_REG_ALERT1, (uint8_t *)&status);
if (status & TCPC_REG_ALERT1_CC_STATUS) {
/* CC status changed, wake task */
task_set_event(PD_PORT_TO_TASK_ID(i), PD_EVENT_CC, 0);
}
if (status & TCPC_REG_ALERT1_RX_STATUS) {
/* message received */
/*
* If TCPC is compiled in, then we will have already
* received PD_EVENT_RX from phy layer in
* pd_rx_event(), so we don't need to set another
* event. If TCPC is not running on this MCU, then
* this needs to wake the PD task.
*/
#ifndef CONFIG_USB_PD_TCPC
task_set_event(PD_PORT_TO_TASK_ID(i), PD_EVENT_RX, 0);
#endif
}
if (status & TCPC_REG_ALERT1_RX_HARD_RST) {
/* hard reset received */
execute_hard_reset(i);
task_wake(PD_PORT_TO_TASK_ID(i));
}
if (status & TCPC_REG_ALERT1_TX_COMPLETE) {
/* transmit complete */
pd_transmit_complete(i, status);
}
}
}
#ifndef CONFIG_USB_PD_TCPC
DECLARE_DEFERRED(tcpc_alert);
#endif
#ifdef CONFIG_USB_PD_DUAL_ROLE
static void dual_role_on(void)
{
int i;
pd_set_dual_role(PD_DRP_TOGGLE_ON);
CPRINTS("chipset -> S0");
for (i = 0; i < CONFIG_USB_PD_PORT_COUNT; i++) {
#ifdef CONFIG_CHARGE_MANAGER
if (charge_manager_get_active_charge_port() != i)
#endif
pd[i].flags |= PD_FLAGS_CHECK_PR_ROLE |
PD_FLAGS_CHECK_DR_ROLE;
}
}
DECLARE_HOOK(HOOK_CHIPSET_RESUME, dual_role_on, HOOK_PRIO_DEFAULT);
static void dual_role_off(void)
{
pd_set_dual_role(PD_DRP_TOGGLE_OFF);
CPRINTS("chipset -> S3");
}
DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, dual_role_off, HOOK_PRIO_DEFAULT);
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, dual_role_off, HOOK_PRIO_DEFAULT);
static void dual_role_force_sink(void)
{
pd_set_dual_role(PD_DRP_FORCE_SINK);
CPRINTS("chipset -> S5");
}
DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, dual_role_force_sink, HOOK_PRIO_DEFAULT);
#ifdef HAS_TASK_CHIPSET
static void dual_role_init(void)
{
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
dual_role_force_sink();
else if (chipset_in_state(CHIPSET_STATE_SUSPEND))
dual_role_off();
else /* CHIPSET_STATE_ON */
dual_role_on();
}
DECLARE_HOOK(HOOK_INIT, dual_role_init, HOOK_PRIO_DEFAULT);
#endif /* HAS_TASK_CHIPSET */
#endif /* CONFIG_USB_PD_DUAL_ROLE */
#ifdef CONFIG_COMMON_RUNTIME
void pd_set_suspend(int port, int enable)
{
set_state(port, enable ? PD_STATE_SUSPENDED : PD_DEFAULT_STATE);
task_wake(PD_PORT_TO_TASK_ID(port));
}
#if defined(CONFIG_CMD_PD) && defined(CONFIG_CMD_PD_FLASH)
static int hex8tou32(char *str, uint32_t *val)
{
char *ptr = str;
uint32_t tmp = 0;
while (*ptr) {
char c = *ptr++;
if (c >= '0' && c <= '9')
tmp = (tmp << 4) + (c - '0');
else if (c >= 'A' && c <= 'F')
tmp = (tmp << 4) + (c - 'A' + 10);
else if (c >= 'a' && c <= 'f')
tmp = (tmp << 4) + (c - 'a' + 10);
else
return EC_ERROR_INVAL;
}
if (ptr != str + 8)
return EC_ERROR_INVAL;
*val = tmp;
return EC_SUCCESS;
}
static int remote_flashing(int argc, char **argv)
{
int port, cnt, cmd;
uint32_t data[VDO_MAX_SIZE-1];
char *e;
static int flash_offset[CONFIG_USB_PD_PORT_COUNT];
if (argc < 4 || argc > (VDO_MAX_SIZE + 4 - 1))
return EC_ERROR_PARAM_COUNT;
port = strtoi(argv[1], &e, 10);
if (*e || port >= CONFIG_USB_PD_PORT_COUNT)
return EC_ERROR_PARAM2;
cnt = 0;
if (!strcasecmp(argv[3], "erase")) {
cmd = VDO_CMD_FLASH_ERASE;
flash_offset[port] = 0;
ccprintf("ERASE ...");
} else if (!strcasecmp(argv[3], "reboot")) {
cmd = VDO_CMD_REBOOT;
ccprintf("REBOOT ...");
} else if (!strcasecmp(argv[3], "signature")) {
cmd = VDO_CMD_ERASE_SIG;
ccprintf("ERASE SIG ...");
} else if (!strcasecmp(argv[3], "info")) {
cmd = VDO_CMD_READ_INFO;
ccprintf("INFO...");
} else if (!strcasecmp(argv[3], "version")) {
cmd = VDO_CMD_VERSION;
ccprintf("VERSION...");
} else {
int i;
argc -= 3;
for (i = 0; i < argc; i++)
if (hex8tou32(argv[i+3], data + i))
return EC_ERROR_INVAL;
cmd = VDO_CMD_FLASH_WRITE;
cnt = argc;
ccprintf("WRITE %d @%04x ...", argc * 4,
flash_offset[port]);
flash_offset[port] += argc * 4;
}
pd_send_vdm(port, USB_VID_GOOGLE, cmd, data, cnt);
/* Wait until VDM is done */
while (pd[port].vdm_state > 0)
task_wait_event(100*MSEC);
ccprintf("DONE %d\n", pd[port].vdm_state);
return EC_SUCCESS;
}
#endif /* defined(CONFIG_CMD_PD) && defined(CONFIG_CMD_PD_FLASH) */
#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);
/* Wait until VDM is done. */
while (pd[0].vdm_state > 0)
task_wait_event(USB_PD_RX_TMOUT_US * (PD_RETRY_COUNT + 1));
}
#endif
int pd_fetch_acc_log_entry(int port)
{
timestamp_t timeout;
/* Cannot send a VDM now, the host should retry */
if (pd[port].vdm_state > 0)
return pd[port].vdm_state == VDM_STATE_BUSY ?
EC_RES_BUSY : EC_RES_UNAVAILABLE;
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_GET_LOG, NULL, 0);
timeout.val = get_time().val + 500*MSEC;
/* Wait until VDM is done */
while ((pd[port].vdm_state > 0) &&
(get_time().val < timeout.val))
task_wait_event(10*MSEC);
if (pd[port].vdm_state > 0)
return EC_RES_TIMEOUT;
else if (pd[port].vdm_state < 0)
return EC_RES_ERROR;
return EC_RES_SUCCESS;
}
#ifdef CONFIG_USB_PD_DUAL_ROLE
void pd_request_source_voltage(int port, int mv)
{
pd_set_max_voltage(mv);
if (pd[port].task_state == PD_STATE_SNK_READY ||
pd[port].task_state == PD_STATE_SNK_TRANSITION) {
/* Set flag to send new power request in pd_task */
pd[port].new_power_request = 1;
} else {
pd[port].power_role = PD_ROLE_SINK;
tcpm_set_cc(port, TYPEC_CC_RD);
set_state(port, PD_STATE_SNK_DISCONNECTED);
}
task_wake(PD_PORT_TO_TASK_ID(port));
}
#endif /* CONFIG_USB_PD_DUAL_ROLE */
static int command_pd(int argc, char **argv)
{
int port;
char *e;
if (argc < 2)
return EC_ERROR_PARAM_COUNT;
#if defined(CONFIG_CMD_PD) && defined(CONFIG_USB_PD_DUAL_ROLE)
/* command: pd <subcmd> <args> */
if (!strcasecmp(argv[1], "dualrole")) {
if (argc < 3) {
ccprintf("dual-role toggling: ");
switch (drp_state) {
case PD_DRP_TOGGLE_ON:
ccprintf("on\n");
break;
case PD_DRP_TOGGLE_OFF:
ccprintf("off\n");
break;
case PD_DRP_FORCE_SINK:
ccprintf("force sink\n");
break;
case PD_DRP_FORCE_SOURCE:
ccprintf("force source\n");
break;
}
} else {
if (!strcasecmp(argv[2], "on"))
pd_set_dual_role(PD_DRP_TOGGLE_ON);
else if (!strcasecmp(argv[2], "off"))
pd_set_dual_role(PD_DRP_TOGGLE_OFF);
else if (!strcasecmp(argv[2], "sink"))
pd_set_dual_role(PD_DRP_FORCE_SINK);
else if (!strcasecmp(argv[2], "source"))
pd_set_dual_role(PD_DRP_FORCE_SOURCE);
else
return EC_ERROR_PARAM3;
}
return EC_SUCCESS;
} else
#endif
if (!strcasecmp(argv[1], "dump")) {
int level;
if (argc < 3)
ccprintf("dump level: %d\n", debug_level);
else {
level = strtoi(argv[2], &e, 10);
if (*e)
return EC_ERROR_PARAM2;
debug_level = level;
}
return EC_SUCCESS;
}
#ifdef CONFIG_CMD_PD
else if (!strcasecmp(argv[1], "enable")) {
int enable;
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
enable = strtoi(argv[2], &e, 10);
if (*e)
return EC_ERROR_PARAM3;
pd_comm_enable(enable);
ccprintf("Ports %s\n", enable ? "enabled" : "disabled");
return EC_SUCCESS;
}
#ifdef CONFIG_CMD_PD_DEV_DUMP_INFO
else if (!strncasecmp(argv[1], "rwhashtable", 3)) {
int i;
struct ec_params_usb_pd_rw_hash_entry *p;
for (i = 0; i < RW_HASH_ENTRIES; i++) {
p = &rw_hash_table[i];
pd_dev_dump_info(p->dev_id, p->dev_rw_hash);
}
return EC_SUCCESS;
}
#endif /* CONFIG_CMD_PD_DEV_DUMP_INFO */
#endif
/* command: pd <port> <subcmd> [args] */
port = strtoi(argv[1], &e, 10);
if (argc < 3)
return EC_ERROR_PARAM_COUNT;
if (*e || port >= CONFIG_USB_PD_PORT_COUNT)
return EC_ERROR_PARAM2;
#if defined(CONFIG_CMD_PD) && defined(CONFIG_USB_PD_DUAL_ROLE)
if (!strcasecmp(argv[2], "tx")) {
set_state(port, PD_STATE_SNK_DISCOVERY);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strcasecmp(argv[2], "bist_rx")) {
set_state(port, PD_STATE_BIST_RX);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strcasecmp(argv[2], "bist_tx")) {
if (*e)
return EC_ERROR_PARAM3;
set_state(port, PD_STATE_BIST_TX);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strcasecmp(argv[2], "charger")) {
pd[port].power_role = PD_ROLE_SOURCE;
tcpm_set_cc(port, TYPEC_CC_RP);
set_state(port, PD_STATE_SRC_DISCONNECTED);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strncasecmp(argv[2], "dev", 3)) {
int max_volt;
if (argc >= 4)
max_volt = strtoi(argv[3], &e, 10) * 1000;
else
max_volt = pd_get_max_voltage();
pd_request_source_voltage(port, max_volt);
ccprintf("max req: %dmV\n", max_volt);
} else if (!strncasecmp(argv[2], "hard", 4)) {
set_state(port, PD_STATE_HARD_RESET_SEND);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strncasecmp(argv[2], "info", 4)) {
int i;
ccprintf("Hash ");
for (i = 0; i < PD_RW_HASH_SIZE / 4; i++)
ccprintf("%08x ", pd[port].dev_rw_hash[i]);
ccprintf("\nImage %s\n", system_image_copy_t_to_string(
pd[port].current_image));
} else if (!strncasecmp(argv[2], "soft", 4)) {
set_state(port, PD_STATE_SOFT_RESET);
task_wake(PD_PORT_TO_TASK_ID(port));
} else if (!strncasecmp(argv[2], "swap", 4)) {
if (argc < 4)
return EC_ERROR_PARAM_COUNT;
if (!strncasecmp(argv[3], "power", 5)) {
pd_request_power_swap(port);
} else if (!strncasecmp(argv[3], "data", 4)) {
pd_request_data_swap(port);
#ifdef CONFIG_USBC_VCONN_SWAP
} else if (!strncasecmp(argv[3], "vconn", 5)) {
set_state(port, PD_STATE_VCONN_SWAP_SEND);
task_wake(PD_PORT_TO_TASK_ID(port));
#endif
} else {
return EC_ERROR_PARAM3;
}
} else if (!strncasecmp(argv[2], "ping", 4)) {
int enable;
if (argc > 3) {
enable = strtoi(argv[3], &e, 10);
if (*e)
return EC_ERROR_PARAM3;
pd_ping_enable(port, enable);
}
ccprintf("Pings %s\n",
(pd[port].flags & PD_FLAGS_PING_ENABLED) ?
"on" : "off");
} else if (!strncasecmp(argv[2], "vdm", 3)) {
if (argc < 4)
return EC_ERROR_PARAM_COUNT;
if (!strncasecmp(argv[3], "ping", 4)) {
uint32_t enable;
if (argc < 5)
return EC_ERROR_PARAM_COUNT;
enable = strtoi(argv[4], &e, 10);
if (*e)
return EC_ERROR_PARAM4;
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_PING_ENABLE,
&enable, 1);
} else if (!strncasecmp(argv[3], "curr", 4)) {
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_CURRENT,
NULL, 0);
} else if (!strncasecmp(argv[3], "vers", 4)) {
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_VERSION,
NULL, 0);
} else {
return EC_ERROR_PARAM_COUNT;
}
#if defined(CONFIG_CMD_PD) && defined(CONFIG_CMD_PD_FLASH)
} else if (!strncasecmp(argv[2], "flash", 4)) {
return remote_flashing(argc, argv);
#endif
} else
#endif
if (!strncasecmp(argv[2], "state", 5)) {
ccprintf("Port C%d, %s - Role: %s-%s%s Polarity: CC%d "
"Flags: 0x%04x, State: %s\n",
port, pd_comm_enabled ? "Ena" : "Dis",
pd[port].power_role == PD_ROLE_SOURCE ? "SRC" : "SNK",
pd[port].data_role == PD_ROLE_DFP ? "DFP" : "UFP",
(pd[port].flags & PD_FLAGS_VCONN_ON) ? "-VC" : "",
pd[port].polarity + 1,
pd[port].flags,
pd_state_names[pd[port].task_state]);
} else {
return EC_ERROR_PARAM1;
}
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(pd, command_pd,
"dualrole|dump|enable [0|1]|rwhashtable|\n\t<port> "
"[tx|bist_rx|bist_tx|charger|clock|dev"
"|soft|hash|hard|ping|state|swap [power|data]|"
"vdm [ping | curr | vers]]",
"USB PD",
NULL);
#ifdef CONFIG_USBC_SS_MUX
#ifdef CONFIG_CMD_TYPEC
static int command_typec(int argc, char **argv)
{
const char * const mux_name[] = {"none", "usb", "dp", "dock"};
char *e;
int port;
enum typec_mux mux = TYPEC_MUX_NONE;
int i;
if (argc < 2)
return EC_ERROR_PARAM_COUNT;
port = strtoi(argv[1], &e, 10);
if (*e || port >= CONFIG_USB_PD_PORT_COUNT)
return EC_ERROR_PARAM1;
if (argc < 3) {
const char *dp_str, *usb_str;
ccprintf("Port C%d: polarity:CC%d\n",
port, pd_get_polarity(port) + 1);
if (board_get_usb_mux(port, &dp_str, &usb_str))
ccprintf("Superspeed %s%s%s\n",
dp_str ? dp_str : "",
dp_str && usb_str ? "+" : "",
usb_str ? usb_str : "");
else
ccprintf("No Superspeed connection\n");
return EC_SUCCESS;
}
for (i = 0; i < ARRAY_SIZE(mux_name); i++)
if (!strcasecmp(argv[2], mux_name[i]))
mux = i;
board_set_usb_mux(port, mux, mux == TYPEC_MUX_NONE ?
USB_SWITCH_DISCONNECT :
USB_SWITCH_CONNECT,
pd_get_polarity(port));
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(typec, command_typec,
"<port> [none|usb|dp|dock]",
"Control type-C connector muxing",
NULL);
#endif /* CONFIG_CMD_TYPEC */
#endif /* CONFIG_USBC_SS_MUX */
#ifdef HAS_TASK_HOSTCMD
static int 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,
};
#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
static int 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_v1 *r_v1 = 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(dual_role_map[p->role]);
#ifdef CONFIG_USBC_SS_MUX
if (p->mux != USB_PD_CTRL_MUX_NO_CHANGE)
board_set_usb_mux(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 (args->version == 0) {
r->enabled = pd_comm_enabled;
r->role = pd[p->port].power_role;
r->polarity = pd[p->port].polarity;
r->state = pd[p->port].task_state;
args->response_size = sizeof(*r);
} else {
r_v1->enabled = pd_comm_enabled |
(pd_is_connected(p->port) << 1);
r_v1->role = pd[p->port].power_role |
(pd[p->port].data_role << 1);
r_v1->polarity = pd[p->port].polarity;
strzcpy(r_v1->state,
pd_state_names[pd[p->port].task_state],
sizeof(r_v1->state));
args->response_size = sizeof(*r_v1);
}
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_CONTROL,
hc_usb_pd_control,
EC_VER_MASK(0) | EC_VER_MASK(1));
static int hc_remote_flash(struct host_cmd_handler_args *args)
{
const struct ec_params_usb_pd_fw_update *p = args->params;
int port = p->port;
const uint32_t *data = &(p->size) + 1;
int i, size, rv = EC_RES_SUCCESS;
timestamp_t timeout;
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
/*
* Busy still with a VDM that host likely generated. 1 deep VDM queue
* so just return for retry logic on host side to deal with.
*/
if (pd[port].vdm_state > 0)
return EC_RES_BUSY;
switch (p->cmd) {
case USB_PD_FW_REBOOT:
pd_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:
pd_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:
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_ERASE_SIG, NULL, 0);
timeout.val = get_time().val + 500*MSEC;
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) {
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_FLASH_WRITE,
data + i, MIN(size - i, VDO_MAX_SIZE - 1));
timeout.val = get_time().val + 500*MSEC;
/* Wait until VDM is done */
while ((pd[port].vdm_state > 0) &&
(get_time().val < timeout.val))
task_wait_event(10*MSEC);
if (pd[port].vdm_state > 0)
return EC_RES_TIMEOUT;
}
return EC_RES_SUCCESS;
default:
return EC_RES_INVALID_PARAM;
break;
}
/* Wait until VDM is done or timeout */
while ((pd[port].vdm_state > 0) && (get_time().val < timeout.val))
task_wait_event(50*MSEC);
if ((pd[port].vdm_state > 0) ||
(pd[port].vdm_state == VDM_STATE_ERR_TMOUT))
rv = EC_RES_TIMEOUT;
else if (pd[port].vdm_state < 0)
rv = EC_RES_ERROR;
return rv;
}
DECLARE_HOST_COMMAND(EC_CMD_USB_PD_FW_UPDATE,
hc_remote_flash,
EC_VER_MASK(0));
static int 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 int 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 = pd[*port].dev_id;
if (r->dev_id) {
memcpy(r->dev_rw_hash, pd[*port].dev_rw_hash,
PD_RW_HASH_SIZE);
}
r->current_image = pd[*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));
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
static int 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 */
#endif /* CONFIG_COMMON_RUNTIME */
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