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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.
*/
/*
* Contains common USB functions shared between the old (i.e. usb_pd_protocol)
* and the new (i.e. usb_sm_*) USB-C PD stacks.
*/
#include "atomic.h"
#include "charge_state.h"
#include "chipset.h"
#include "common.h"
#include "console.h"
#include "hooks.h"
#include "system.h"
#include "task.h"
#include "usb_common.h"
#include "usb_mux.h"
#include "usb_pd.h"
#include "usb_pd_tcpm.h"
#include "usbc_ppc.h"
#include "util.h"
#ifdef CONFIG_COMMON_RUNTIME
#define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBPD, format, ## args)
#else
#define CPRINTS(format, args...)
#define CPRINTF(format, args...)
#endif
int usb_get_battery_soc(void)
{
#if defined(CONFIG_CHARGER)
return charge_get_percent();
#elif defined(CONFIG_BATTERY)
return board_get_battery_soc();
#else
return 0;
#endif
}
#if defined(CONFIG_USB_PD_PREFER_MV) && defined(PD_PREFER_LOW_VOLTAGE) + \
defined(PD_PREFER_HIGH_VOLTAGE) > 1
#error "PD preferred voltage strategy should be mutually exclusive."
#endif
STATIC_IF_NOT(CONFIG_USB_PD_PREFER_MV)
struct pd_pref_config_t __maybe_unused pd_pref_config;
/*
* CC values for regular sources and Debug sources (aka DTS)
*
* Source type Mode of Operation CC1 CC2
* ---------------------------------------------
* Regular Default USB Power RpUSB Open
* Regular USB-C @ 1.5 A Rp1A5 Open
* Regular USB-C @ 3 A Rp3A0 Open
* DTS Default USB Power Rp3A0 Rp1A5
* DTS USB-C @ 1.5 A Rp1A5 RpUSB
* DTS USB-C @ 3 A Rp3A0 RpUSB
*/
typec_current_t usb_get_typec_current_limit(enum pd_cc_polarity_type polarity,
enum tcpc_cc_voltage_status cc1, enum tcpc_cc_voltage_status cc2)
{
typec_current_t charge = 0;
enum tcpc_cc_voltage_status cc = polarity ? cc2 : cc1;
enum tcpc_cc_voltage_status cc_alt = polarity ? cc1 : cc2;
switch (cc) {
case TYPEC_CC_VOLT_RP_3_0:
if (!cc_is_rp(cc_alt) || cc_alt == TYPEC_CC_VOLT_RP_DEF)
charge = 3000;
else if (cc_alt == TYPEC_CC_VOLT_RP_1_5)
charge = 500;
break;
case TYPEC_CC_VOLT_RP_1_5:
charge = 1500;
break;
case TYPEC_CC_VOLT_RP_DEF:
charge = 500;
break;
default:
break;
}
if (IS_ENABLED(CONFIG_USBC_DISABLE_CHARGE_FROM_RP_DEF) && charge == 500)
charge = 0;
if (cc_is_rp(cc_alt))
charge |= TYPEC_CURRENT_DTS_MASK;
return charge;
}
enum pd_cc_polarity_type get_snk_polarity(enum tcpc_cc_voltage_status cc1,
enum tcpc_cc_voltage_status cc2)
{
/* The following assumes:
*
* TYPEC_CC_VOLT_RP_3_0 > TYPEC_CC_VOLT_RP_1_5
* TYPEC_CC_VOLT_RP_1_5 > TYPEC_CC_VOLT_RP_DEF
* TYPEC_CC_VOLT_RP_DEF > TYPEC_CC_VOLT_OPEN
*/
return cc2 > cc1;
}
enum pd_cc_states pd_get_cc_state(
enum tcpc_cc_voltage_status cc1, enum tcpc_cc_voltage_status cc2)
{
/* Port partner is a SNK */
if (cc_is_snk_dbg_acc(cc1, cc2))
return PD_CC_UFP_DEBUG_ACC;
if (cc_is_at_least_one_rd(cc1, cc2))
return PD_CC_UFP_ATTACHED;
if (cc_is_audio_acc(cc1, cc2))
return PD_CC_UFP_AUDIO_ACC;
/* Port partner is a SRC */
if (cc_is_rp(cc1) && cc_is_rp(cc2))
return PD_CC_DFP_DEBUG_ACC;
if (cc_is_rp(cc1) || cc_is_rp(cc2))
return PD_CC_DFP_ATTACHED;
/*
* 1) Both lines are Vopen or
* 2) Only an e-marked cabled without a partner on the other side
*/
return PD_CC_NONE;
}
/*
* Zinger implements a board specific usb policy that does not define
* PD_MAX_VOLTAGE_MV and PD_OPERATING_POWER_MW. And in turn, does not
* use the following functions.
*/
#if defined(PD_MAX_VOLTAGE_MV) && defined(PD_OPERATING_POWER_MW)
int pd_find_pdo_index(uint32_t src_cap_cnt, const uint32_t * const src_caps,
int max_mv, uint32_t *selected_pdo)
{
int i, uw, mv;
int ret = 0;
int cur_uw = 0;
int has_preferred_pdo;
int prefer_cur;
int desired_uw = 0;
const int prefer_mv = pd_pref_config.mv;
const int type = pd_pref_config.type;
int __attribute__((unused)) cur_mv = 0;
if (IS_ENABLED(CONFIG_USB_PD_PREFER_MV))
desired_uw = charge_get_plt_plus_bat_desired_mw() * 1000;
/* max voltage is always limited by this boards max request */
max_mv = MIN(max_mv, PD_MAX_VOLTAGE_MV);
/* Get max power that is under our max voltage input */
for (i = 0; i < src_cap_cnt; i++) {
/* its an unsupported Augmented PDO (PD3.0) */
if ((src_caps[i] & PDO_TYPE_MASK) == PDO_TYPE_AUGMENTED)
continue;
mv = ((src_caps[i] >> 10) & 0x3FF) * 50;
/* Skip invalid voltage */
if (!mv)
continue;
/* Skip any voltage not supported by this board */
if (!pd_is_valid_input_voltage(mv))
continue;
if ((src_caps[i] & PDO_TYPE_MASK) == PDO_TYPE_BATTERY) {
uw = 250000 * (src_caps[i] & 0x3FF);
} else {
int ma = (src_caps[i] & 0x3FF) * 10;
ma = MIN(ma, PD_MAX_CURRENT_MA);
uw = ma * mv;
}
if (mv > max_mv)
continue;
uw = MIN(uw, PD_MAX_POWER_MW * 1000);
prefer_cur = 0;
/* Apply special rules in favor of voltage */
if (IS_ENABLED(PD_PREFER_LOW_VOLTAGE)) {
if (uw == cur_uw && mv < cur_mv)
prefer_cur = 1;
} else if (IS_ENABLED(PD_PREFER_HIGH_VOLTAGE)) {
if (uw == cur_uw && mv > cur_mv)
prefer_cur = 1;
} else if (IS_ENABLED(CONFIG_USB_PD_PREFER_MV)) {
/* Pick if the PDO provides more than desired. */
if (uw >= desired_uw) {
/* pick if cur_uw is less than desired watt */
if (cur_uw < desired_uw)
prefer_cur = 1;
else if (type == PD_PREFER_BUCK) {
/*
* pick the smallest mV above prefer_mv
*/
if (mv >= prefer_mv && mv < cur_mv)
prefer_cur = 1;
/*
* pick if cur_mv is less than
* prefer_mv, and we have higher mV
*/
else if (cur_mv < prefer_mv &&
mv > cur_mv)
prefer_cur = 1;
} else if (type == PD_PREFER_BOOST) {
/*
* pick the largest mV below prefer_mv
*/
if (mv <= prefer_mv && mv > cur_mv)
prefer_cur = 1;
/*
* pick if cur_mv is larger than
* prefer_mv, and we have lower mV
*/
else if (cur_mv > prefer_mv &&
mv < cur_mv)
prefer_cur = 1;
}
/*
* pick the largest power if we don't see one staisfy
* desired power
*/
} else if (cur_uw == 0 || uw > cur_uw) {
prefer_cur = 1;
}
}
/* Prefer higher power, except for tiebreaker */
has_preferred_pdo =
prefer_cur ||
(!IS_ENABLED(CONFIG_USB_PD_PREFER_MV) && uw > cur_uw);
if (has_preferred_pdo) {
ret = i;
cur_uw = uw;
cur_mv = mv;
}
}
if (selected_pdo)
*selected_pdo = src_caps[ret];
return ret;
}
void pd_extract_pdo_power(uint32_t pdo, uint32_t *ma, uint32_t *mv)
{
int max_ma, uw;
*mv = ((pdo >> 10) & 0x3FF) * 50;
if (*mv == 0) {
*ma = 0;
return;
}
if ((pdo & PDO_TYPE_MASK) == PDO_TYPE_BATTERY) {
uw = 250000 * (pdo & 0x3FF);
max_ma = 1000 * MIN(1000 * uw, PD_MAX_POWER_MW) / *mv;
} else {
max_ma = 10 * (pdo & 0x3FF);
max_ma = MIN(max_ma, PD_MAX_POWER_MW * 1000 / *mv);
}
*ma = MIN(max_ma, PD_MAX_CURRENT_MA);
}
void pd_build_request(uint32_t src_cap_cnt, const uint32_t * const src_caps,
int32_t vpd_vdo, uint32_t *rdo, uint32_t *ma,
uint32_t *mv, enum pd_request_type req_type,
uint32_t max_request_mv)
{
uint32_t pdo;
int pdo_index, flags = 0;
int uw;
int max_or_min_ma;
int max_or_min_mw;
int max_vbus;
int vpd_vbus_dcr;
int vpd_gnd_dcr;
if (req_type == PD_REQUEST_VSAFE5V) {
/* src cap 0 should be vSafe5V */
pdo_index = 0;
pdo = src_caps[0];
} else {
/* find pdo index for max voltage we can request */
pdo_index = pd_find_pdo_index(src_cap_cnt, src_caps,
max_request_mv, &pdo);
}
pd_extract_pdo_power(pdo, ma, mv);
/*
* Adjust VBUS current if CTVPD device was detected.
*/
if (vpd_vdo > 0) {
max_vbus = VPD_VDO_MAX_VBUS(vpd_vdo);
vpd_vbus_dcr = VPD_VDO_VBUS_IMP(vpd_vdo) << 1;
vpd_gnd_dcr = VPD_VDO_GND_IMP(vpd_vdo);
/*
* Valid max_vbus values:
* 00b - 20000 mV
* 01b - 30000 mV
* 10b - 40000 mV
* 11b - 50000 mV
*/
max_vbus = 20000 + max_vbus * 10000;
if (*mv > max_vbus)
*mv = max_vbus;
/*
* 5000 mA cable: 150 = 750000 / 50000
* 3000 mA cable: 250 = 750000 / 30000
*/
if (*ma > 3000)
*ma = 750000 / (150 + vpd_vbus_dcr + vpd_gnd_dcr);
else
*ma = 750000 / (250 + vpd_vbus_dcr + vpd_gnd_dcr);
}
uw = *ma * *mv;
/* Mismatch bit set if less power offered than the operating power */
if (uw < (1000 * PD_OPERATING_POWER_MW))
flags |= RDO_CAP_MISMATCH;
#ifdef CONFIG_USB_PD_GIVE_BACK
/* Tell source we are give back capable. */
flags |= RDO_GIVE_BACK;
/*
* BATTERY PDO: Inform the source that the sink will reduce
* power to this minimum level on receipt of a GotoMin Request.
*/
max_or_min_mw = PD_MIN_POWER_MW;
/*
* FIXED or VARIABLE PDO: Inform the source that the sink will
* reduce current to this minimum level on receipt of a GotoMin
* Request.
*/
max_or_min_ma = PD_MIN_CURRENT_MA;
#else
/*
* Can't give back, so set maximum current and power to
* operating level.
*/
max_or_min_ma = *ma;
max_or_min_mw = uw / 1000;
#endif
if ((pdo & PDO_TYPE_MASK) == PDO_TYPE_BATTERY) {
int mw = uw / 1000;
*rdo = RDO_BATT(pdo_index + 1, mw, max_or_min_mw, flags);
} else {
*rdo = RDO_FIXED(pdo_index + 1, *ma, max_or_min_ma, flags);
}
}
#endif
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
void notify_sysjump_ready(volatile const task_id_t * const sysjump_task_waiting)
{
/*
* If event was set from pd_prepare_sysjump, wake the
* task waiting on us to complete.
*/
if (*sysjump_task_waiting != TASK_ID_INVALID)
task_set_event(*sysjump_task_waiting,
TASK_EVENT_SYSJUMP_READY, 0);
}
#endif
__attribute__((weak)) uint8_t board_get_usb_pd_port_count(void)
{
return CONFIG_USB_PD_PORT_MAX_COUNT;
}
enum pd_drp_next_states drp_auto_toggle_next_state(
uint64_t *drp_sink_time,
enum pd_power_role power_role,
enum pd_dual_role_states drp_state,
enum tcpc_cc_voltage_status cc1,
enum tcpc_cc_voltage_status cc2)
{
/* Set to appropriate port state */
if (cc_is_open(cc1, cc2)) {
/*
* If nothing is attached then use drp_state to determine next
* state. If DRP auto toggle is still on, then remain in the
* DRP_AUTO_TOGGLE state. Otherwise, stop dual role toggling
* and go to a disconnected state.
*/
switch (drp_state) {
case PD_DRP_TOGGLE_OFF:
return DRP_TC_DEFAULT;
case PD_DRP_FREEZE:
if (power_role == PD_ROLE_SINK)
return DRP_TC_UNATTACHED_SNK;
else
return DRP_TC_UNATTACHED_SRC;
case PD_DRP_FORCE_SINK:
return DRP_TC_UNATTACHED_SNK;
case PD_DRP_FORCE_SOURCE:
return DRP_TC_UNATTACHED_SRC;
case PD_DRP_TOGGLE_ON:
default:
return DRP_TC_DRP_AUTO_TOGGLE;
}
} else if ((cc_is_rp(cc1) || cc_is_rp(cc2)) &&
drp_state != PD_DRP_FORCE_SOURCE) {
/* SNK allowed unless ForceSRC */
return DRP_TC_UNATTACHED_SNK;
} else if (cc_is_at_least_one_rd(cc1, cc2) ||
cc_is_audio_acc(cc1, cc2)) {
/*
* SRC allowed unless ForceSNK or Toggle Off
*
* Ideally we wouldn't use auto-toggle when drp_state is
* TOGGLE_OFF/FORCE_SINK, but for some TCPCs, auto-toggle can't
* be prevented in low power mode. Try being a sink in case the
* connected device is dual-role (this ensures reliable charging
* from a hub, b/72007056). 100 ms is enough time for a
* dual-role partner to switch from sink to source. If the
* connected device is sink-only, then we will attempt
* TC_UNATTACHED_SNK twice (due to debounce time), then return
* to low power mode (and stay there). After 200 ms, reset
* ready for a new connection.
*/
if (drp_state == PD_DRP_TOGGLE_OFF ||
drp_state == PD_DRP_FORCE_SINK) {
if (get_time().val > *drp_sink_time + 200*MSEC)
*drp_sink_time = get_time().val;
if (get_time().val < *drp_sink_time + 100*MSEC)
return DRP_TC_UNATTACHED_SNK;
else
return DRP_TC_DRP_AUTO_TOGGLE;
} else {
return DRP_TC_UNATTACHED_SRC;
}
} else {
/* Anything else, keep toggling */
return DRP_TC_DRP_AUTO_TOGGLE;
}
}
#ifdef CONFIG_USBC_PPC
static void pd_send_hard_reset(int port)
{
task_set_event(PD_PORT_TO_TASK_ID(port), PD_EVENT_SEND_HARD_RESET, 0);
}
static uint32_t port_oc_reset_req;
static void re_enable_ports(void)
{
uint32_t ports = atomic_read_clear(&port_oc_reset_req);
while (ports) {
int port = __fls(ports);
ports &= ~BIT(port);
/*
* Let the board know that the overcurrent is
* over since we're going to attempt re-enabling
* the port.
*/
board_overcurrent_event(port, 0);
pd_send_hard_reset(port);
/*
* TODO(b/117854867): PD3.0 to send an alert message
* indicating OCP after explicit contract.
*/
}
}
DECLARE_DEFERRED(re_enable_ports);
void pd_handle_overcurrent(int port)
{
/* Keep track of the overcurrent events. */
CPRINTS("C%d: overcurrent!", port);
if (IS_ENABLED(CONFIG_USB_PD_LOGGING))
pd_log_event(PD_EVENT_PS_FAULT, PD_LOG_PORT_SIZE(port, 0),
PS_FAULT_OCP, NULL);
ppc_add_oc_event(port);
/* Let the board specific code know about the OC event. */
board_overcurrent_event(port, 1);
/* Wait 1s before trying to re-enable the port. */
atomic_or(&port_oc_reset_req, BIT(port));
hook_call_deferred(&re_enable_ports_data, SECOND);
}
void pd_handle_cc_overvoltage(int port)
{
pd_send_hard_reset(port);
}
#endif /* CONFIG_USBC_PPC */
__overridable int pd_board_checks(void)
{
return EC_SUCCESS;
}
__overridable int pd_check_data_swap(int port, int data_role)
{
/* Allow data swap if we are a UFP, otherwise don't allow. */
return (data_role == PD_ROLE_UFP) ? 1 : 0;
}
__overridable void pd_check_dr_role(int port, int dr_role, int flags)
{
/* If UFP, try to switch to DFP */
if ((flags & PD_FLAGS_PARTNER_DR_DATA) && dr_role == PD_ROLE_UFP)
pd_request_data_swap(port);
}
__overridable int pd_check_power_swap(int port)
{
/*
* Allow power swap if we are acting as a dual role device. If we are
* not acting as dual role (ex. suspended), then only allow power swap
* if we are sourcing when we could be sinking.
*/
if (pd_get_dual_role(port) == PD_DRP_TOGGLE_ON)
return 1;
else if (pd_get_role(port) == PD_ROLE_SOURCE)
return 1;
return 0;
}
__overridable void pd_check_pr_role(int port, int pr_role, int flags)
{
/*
* If partner is dual-role power and dualrole toggling is on, consider
* if a power swap is necessary.
*/
if ((flags & PD_FLAGS_PARTNER_DR_POWER) &&
pd_get_dual_role(port) == PD_DRP_TOGGLE_ON) {
/*
* If we are a sink and partner is not externally powered, then
* swap to become a source. If we are source and partner is
* externally powered, swap to become a sink.
*/
int partner_extpower = flags & PD_FLAGS_PARTNER_EXTPOWER;
if ((!partner_extpower && pr_role == PD_ROLE_SINK) ||
(partner_extpower && pr_role == PD_ROLE_SOURCE))
pd_request_power_swap(port);
}
}
__overridable void pd_execute_data_swap(int port, int data_role)
{
}
__overridable int pd_is_valid_input_voltage(int mv)
{
return 1;
}
__overridable void pd_transition_voltage(int idx)
{
/* Most devices are fixed 5V output. */
}
__overridable void typec_set_source_current_limit(int p, enum tcpc_rp_value rp)
{
if (IS_ENABLED(CONFIG_USBC_PPC))
ppc_set_vbus_source_current_limit(p, rp);
}
/* ---------------- Power Data Objects (PDOs) ----------------- */
#ifndef CONFIG_USB_PD_CUSTOM_PDO
#define PDO_FIXED_FLAGS (PDO_FIXED_DUAL_ROLE | PDO_FIXED_DATA_SWAP |\
PDO_FIXED_COMM_CAP)
const uint32_t pd_src_pdo[] = {
PDO_FIXED(5000, 1500, PDO_FIXED_FLAGS),
};
const int pd_src_pdo_cnt = ARRAY_SIZE(pd_src_pdo);
const uint32_t pd_src_pdo_max[] = {
PDO_FIXED(5000, 3000, PDO_FIXED_FLAGS),
};
const int pd_src_pdo_max_cnt = ARRAY_SIZE(pd_src_pdo_max);
const uint32_t pd_snk_pdo[] = {
PDO_FIXED(5000, 500, PDO_FIXED_FLAGS),
PDO_BATT(4750, PD_MAX_VOLTAGE_MV, PD_OPERATING_POWER_MW),
PDO_VAR(4750, PD_MAX_VOLTAGE_MV, PD_MAX_CURRENT_MA),
};
const int pd_snk_pdo_cnt = ARRAY_SIZE(pd_snk_pdo);
#endif /* CONFIG_USB_PD_CUSTOM_PDO */
/* ----------------- Vendor Defined Messages ------------------ */
__overridable int pd_custom_vdm(int port, int cnt, uint32_t *payload,
uint32_t **rpayload)
{
int cmd = PD_VDO_CMD(payload[0]);
uint16_t dev_id = 0;
int is_rw, is_latest;
/* make sure we have some payload */
if (cnt == 0)
return 0;
switch (cmd) {
case VDO_CMD_VERSION:
/* guarantee last byte of payload is null character */
*(payload + cnt - 1) = 0;
CPRINTF("version: %s\n", (char *)(payload+1));
break;
case VDO_CMD_READ_INFO:
case VDO_CMD_SEND_INFO:
/* copy hash */
if (cnt == 7) {
dev_id = VDO_INFO_HW_DEV_ID(payload[6]);
is_rw = VDO_INFO_IS_RW(payload[6]);
is_latest = pd_dev_store_rw_hash(port,
dev_id,
payload + 1,
is_rw ?
SYSTEM_IMAGE_RW :
SYSTEM_IMAGE_RO);
/*
* Send update host event unless our RW hash is
* already known to be the latest update RW.
*/
if (!is_rw || !is_latest)
pd_send_host_event(PD_EVENT_UPDATE_DEVICE);
CPRINTF("DevId:%d.%d SW:%d RW:%d\n",
HW_DEV_ID_MAJ(dev_id),
HW_DEV_ID_MIN(dev_id),
VDO_INFO_SW_DBG_VER(payload[6]),
is_rw);
} else if (cnt == 6) {
/* really old devices don't have last byte */
pd_dev_store_rw_hash(port, dev_id, payload + 1,
SYSTEM_IMAGE_UNKNOWN);
}
break;
case VDO_CMD_CURRENT:
CPRINTF("Current: %dmA\n", payload[1]);
break;
case VDO_CMD_FLIP:
if (IS_ENABLED(CONFIG_USBC_SS_MUX))
usb_mux_flip(port);
break;
#ifdef CONFIG_USB_PD_LOGGING
case VDO_CMD_GET_LOG:
pd_log_recv_vdm(port, cnt, payload);
break;
#endif /* CONFIG_USB_PD_LOGGING */
}
return 0;
}
#ifdef CONFIG_USB_PD_ALT_MODE_DFP
__overridable const struct svdm_response svdm_rsp = {
.identity = NULL,
.svids = NULL,
.modes = NULL,
};
int dp_flags[CONFIG_USB_PD_PORT_MAX_COUNT];
uint32_t dp_status[CONFIG_USB_PD_PORT_MAX_COUNT];
__overridable void svdm_safe_dp_mode(int port)
{
/* make DP interface safe until configure */
dp_flags[port] = 0;
dp_status[port] = 0;
usb_mux_set(port, IS_ENABLED(CONFIG_USB_MUX_VIRTUAL) ?
TYPEC_MUX_SAFE : TYPEC_MUX_NONE,
USB_SWITCH_CONNECT, pd_get_polarity(port));
/* Isolate the SBU lines. */
if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
ppc_set_sbu(port, 0);
}
__overridable int svdm_enter_dp_mode(int port, uint32_t mode_caps)
{
/*
* Don't enter the mode if the SoC is off.
*
* There's no need to enter the mode while the SoC is off; we'll
* actually enter the mode on the chipset resume hook. Entering DP Alt
* Mode twice will confuse some monitors and require and unplug/replug
* to get them to work again. The DP Alt Mode on USB-C spec says that
* if we don't need to maintain HPD connectivity info in a low power
* mode, then we shall exit DP Alt Mode. (This is why we don't enter
* when the SoC is off as opposed to suspend where adding a display
* could cause a wake up.)
*/
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
return -1;
/* Only enter mode if device is DFP_D capable */
if (mode_caps & MODE_DP_SNK) {
svdm_safe_dp_mode(port);
if (IS_ENABLED(CONFIG_MKBP_EVENT) &&
chipset_in_state(CHIPSET_STATE_ANY_SUSPEND))
/*
* Wake the system up since we're entering DP AltMode.
*/
pd_notify_dp_alt_mode_entry();
return 0;
}
return -1;
}
__overridable int svdm_dp_status(int port, uint32_t *payload)
{
int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT);
payload[0] = VDO(USB_SID_DISPLAYPORT, 1,
CMD_DP_STATUS | VDO_OPOS(opos));
payload[1] = VDO_DP_STATUS(0, /* HPD IRQ ... not applicable */
0, /* HPD level ... not applicable */
0, /* exit DP? ... no */
0, /* usb mode? ... no */
0, /* multi-function ... no */
(!!(dp_flags[port] & DP_FLAGS_DP_ON)),
0, /* power low? ... no */
(!!DP_FLAGS_DP_ON));
return 2;
};
__overridable int svdm_dp_config(int port, uint32_t *payload)
{
int opos = pd_alt_mode(port, USB_SID_DISPLAYPORT);
int mf_pref = PD_VDO_DPSTS_MF_PREF(dp_status[port]);
int pin_mode = pd_dfp_dp_get_pin_mode(port, dp_status[port]);
enum typec_mux mux_mode;
if (!pin_mode)
return 0;
/*
* Multi-function operation is only allowed if that pin config is
* supported.
*/
mux_mode = ((pin_mode & MODE_DP_PIN_MF_MASK) && mf_pref) ?
TYPEC_MUX_DOCK : TYPEC_MUX_DP;
CPRINTS("pin_mode: %x, mf: %d, mux: %d", pin_mode, mf_pref, mux_mode);
/* Connect the SBU and USB lines to the connector. */
if (IS_ENABLED(CONFIG_USBC_PPC_SBU))
ppc_set_sbu(port, 1);
usb_mux_set(port, mux_mode, USB_SWITCH_CONNECT, pd_get_polarity(port));
payload[0] = VDO(USB_SID_DISPLAYPORT, 1,
CMD_DP_CONFIG | VDO_OPOS(opos));
payload[1] = VDO_DP_CFG(pin_mode, /* pin mode */
1, /* DPv1.3 signaling */
2); /* UFP connected */
return 2;
};
/*
* timestamp of the next possible toggle to ensure the 2-ms spacing
* between IRQ_HPD.
*/
STATIC_IF(CONFIG_USB_PD_DP_HPD_GPIO)
uint64_t hpd_deadline[CONFIG_USB_PD_PORT_MAX_COUNT];
#ifndef PORT_TO_HPD
#define PORT_TO_HPD(port) ((port) ? GPIO_USB_C1_DP_HPD : GPIO_USB_C0_DP_HPD)
#endif /* PORT_TO_HPD */
__overridable void svdm_dp_post_config(int port)
{
const struct usb_mux *mux = &usb_muxes[port];
dp_flags[port] |= DP_FLAGS_DP_ON;
if (!(dp_flags[port] & DP_FLAGS_HPD_HI_PENDING))
return;
#ifdef CONFIG_USB_PD_DP_HPD_GPIO
gpio_set_level(PORT_TO_HPD(port), 1);
/* set the minimum time delay (2ms) for the next HPD IRQ */
hpd_deadline[port] = get_time().val + HPD_USTREAM_DEBOUNCE_LVL;
#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
if (mux->hpd_update)
mux->hpd_update(port, 1, 0);
#ifdef USB_PD_PORT_TCPC_MST
if (port == USB_PD_PORT_TCPC_MST)
baseboard_mst_enable_control(port, 1);
#endif
}
__overridable int svdm_dp_attention(int port, uint32_t *payload)
{
int lvl = PD_VDO_DPSTS_HPD_LVL(payload[1]);
int irq = PD_VDO_DPSTS_HPD_IRQ(payload[1]);
const struct usb_mux *mux = &usb_muxes[port];
#ifdef CONFIG_USB_PD_DP_HPD_GPIO
enum gpio_signal hpd = PORT_TO_HPD(port);
int cur_lvl = gpio_get_level(hpd);
#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
dp_status[port] = payload[1];
if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND) &&
(irq || lvl))
/*
* Wake up the AP. IRQ or level high indicates a DP sink is now
* present.
*/
if (IS_ENABLED(CONFIG_MKBP_EVENT))
pd_notify_dp_alt_mode_entry();
/* Its initial DP status message prior to config */
if (!(dp_flags[port] & DP_FLAGS_DP_ON)) {
if (lvl)
dp_flags[port] |= DP_FLAGS_HPD_HI_PENDING;
return 1;
}
#ifdef CONFIG_USB_PD_DP_HPD_GPIO
if (irq & cur_lvl) {
uint64_t now = get_time().val;
/* wait for the minimum spacing between IRQ_HPD if needed */
if (now < hpd_deadline[port])
usleep(hpd_deadline[port] - now);
/* generate IRQ_HPD pulse */
gpio_set_level(hpd, 0);
usleep(HPD_DSTREAM_DEBOUNCE_IRQ);
gpio_set_level(hpd, 1);
/* set the minimum time delay (2ms) for the next HPD IRQ */
hpd_deadline[port] = get_time().val + HPD_USTREAM_DEBOUNCE_LVL;
} else if (irq & !lvl) {
/*
* IRQ can only be generated when the level is high, because
* the IRQ is signaled by a short low pulse from the high level.
*/
CPRINTF("ERR:HPD:IRQ&LOW\n");
return 0; /* nak */
} else {
gpio_set_level(hpd, lvl);
/* set the minimum time delay (2ms) for the next HPD IRQ */
hpd_deadline[port] = get_time().val + HPD_USTREAM_DEBOUNCE_LVL;
}
#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
if (mux->hpd_update)
mux->hpd_update(port, lvl, irq);
#ifdef USB_PD_PORT_TCPC_MST
if (port == USB_PD_PORT_TCPC_MST)
baseboard_mst_enable_control(port, lvl);
#endif
/* ack */
return 1;
}
__overridable void svdm_exit_dp_mode(int port)
{
const struct usb_mux *mux = &usb_muxes[port];
svdm_safe_dp_mode(port);
#ifdef CONFIG_USB_PD_DP_HPD_GPIO
gpio_set_level(PORT_TO_HPD(port), 0);
#endif /* CONFIG_USB_PD_DP_HPD_GPIO */
if (mux->hpd_update)
mux->hpd_update(port, 0, 0);
#ifdef USB_PD_PORT_TCPC_MST
if (port == USB_PD_PORT_TCPC_MST)
baseboard_mst_enable_control(port, 0);
#endif
}
__overridable int svdm_enter_gfu_mode(int port, uint32_t mode_caps)
{
/* Always enter GFU mode */
return 0;
}
__overridable void svdm_exit_gfu_mode(int port)
{
}
__overridable int svdm_gfu_status(int port, uint32_t *payload)
{
/*
* This is called after enter mode is successful, send unstructured
* VDM to read info.
*/
pd_send_vdm(port, USB_VID_GOOGLE, VDO_CMD_READ_INFO, NULL, 0);
return 0;
}
__overridable int svdm_gfu_config(int port, uint32_t *payload)
{
return 0;
}
__overridable int svdm_gfu_attention(int port, uint32_t *payload)
{
return 0;
}
const struct svdm_amode_fx supported_modes[] = {
{
.svid = USB_SID_DISPLAYPORT,
.enter = &svdm_enter_dp_mode,
.status = &svdm_dp_status,
.config = &svdm_dp_config,
.post_config = &svdm_dp_post_config,
.attention = &svdm_dp_attention,
.exit = &svdm_exit_dp_mode,
},
{
.svid = USB_VID_GOOGLE,
.enter = &svdm_enter_gfu_mode,
.status = &svdm_gfu_status,
.config = &svdm_gfu_config,
.attention = &svdm_gfu_attention,
.exit = &svdm_exit_gfu_mode,
}
};
const int supported_modes_cnt = ARRAY_SIZE(supported_modes);
#endif /* CONFIG_USB_PD_ALT_MODE_DFP */
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