/**
* Update charge ceiling for a given port. The ceiling can be set independently
* for several requestors, and the min. ceil will be enforced.
*
* @param port Charge port to update.
* @param requestor Charge ceiling requestor.
* @param ceil Charge ceiling (mA).
*/
void charge_manager_set_ceil(int port, enum ceil_requestor requestor, int ceil)
{
ASSERT(port >= 0 && port < CONFIG_USB_PD_PORT_COUNT &&
requestor >= 0 && requestor < CEIL_REQUESTOR_COUNT);
if (charge_ceil[port][requestor] != ceil) {
charge_ceil[port][requestor] = ceil;
if (port == charge_port && charge_manager_is_seeded())
hook_call_deferred(charge_manager_refresh, 0);
}
}
/**
* Select an 'override port', a port which is always the preferred charge port.
* Returns EC_SUCCESS on success, ec_error_list status on failure.
*
* @param port Charge port to select as override, or
* OVERRIDE_OFF to select no override port,
* or OVERRIDE_DONT_CHARGE to specifc that no
* charge port should be selected.
*/
int charge_manager_set_override(int port)
{
int retval = EC_SUCCESS;
ASSERT(port >= OVERRIDE_DONT_CHARGE && port < CONFIG_USB_PD_PORT_COUNT);
CPRINTS("Charge Override: %d", port);
/* Supersede any pending delayed overrides. */
if (delayed_override_port != OVERRIDE_OFF) {
if (delayed_override_port != port)
charge_manager_cleanup_override_port(
delayed_override_port);
delayed_override_port = OVERRIDE_OFF;
hook_call_deferred(
charge_override_timeout, -1);
}
/* Set the override port if it's a sink. */
if (port < 0 || pd_get_role(port) == PD_ROLE_SINK) {
if (override_port != port) {
charge_manager_cleanup_override_port(override_port);
override_port = port;
if (charge_manager_is_seeded())
hook_call_deferred(charge_manager_refresh, 0);
}
}
/*
* If the attached device is capable of being a sink, request a
* power swap and set the delayed override for swap completion.
*/
else if (pd_get_role(port) != PD_ROLE_SINK &&
dualrole_capability[port] == CAP_DUALROLE) {
delayed_override_deadline.val = get_time().val +
POWER_SWAP_TIMEOUT;
delayed_override_port = port;
hook_call_deferred(
charge_override_timeout,
POWER_SWAP_TIMEOUT);
pd_request_power_swap(port);
/* Can't charge from requested port -- return error. */
} else
retval = EC_ERROR_INVAL;
return retval;
}
/**
* Select an 'override port', a port which is always the preferred charge port.
* Returns EC_SUCCESS on success, ec_error_list status on failure.
*
* @param port Charge port to select as override, or
* OVERRIDE_OFF to select no override port,
* or OVERRIDE_DONT_CHARGE to specifc that no
* charge port should be selected.
*/
int charge_manager_set_override(int port)
{
int retval = EC_SUCCESS;
ASSERT(port >= OVERRIDE_DONT_CHARGE && port < CONFIG_USB_PD_PORT_COUNT);
CPRINTS("Charge Override: %d", port);
/*
* If attempting to change the override port, then return
* error. Since we may be in the middle of a power swap on
* the original override port, it's too complicated to
* guarantee that the original override port is switched back
* to source.
*/
if (delayed_override_port != OVERRIDE_OFF)
return EC_ERROR_BUSY;
/* Set the override port if it's a sink. */
if (port < 0 || pd_get_role(port) == PD_ROLE_SINK) {
if (override_port != port) {
override_port = port;
if (charge_manager_is_seeded())
hook_call_deferred(charge_manager_refresh, 0);
}
}
/*
* If the attached device is capable of being a sink, request a
* power swap and set the delayed override for swap completion.
*/
else if (pd_get_role(port) != PD_ROLE_SINK &&
dualrole_capability[port] == CAP_DUALROLE) {
delayed_override_deadline.val = get_time().val +
POWER_SWAP_TIMEOUT;
delayed_override_port = port;
hook_call_deferred(
charge_override_timeout,
POWER_SWAP_TIMEOUT);
pd_request_power_swap(port);
/* Can't charge from requested port -- return error. */
} else
retval = EC_ERROR_INVAL;
return retval;
}
static void charge_manager_make_change(enum charge_manager_change_type change,
int supplier,
int port,
struct charge_port_info *charge)
{
int i;
int clear_override = 0;
/* Determine if this is a change which can affect charge status */
switch (change) {
case CHANGE_CHARGE:
/* Ignore changes where charge is identical */
if (available_charge[supplier][port].current ==
charge->current &&
available_charge[supplier][port].voltage ==
charge->voltage)
return;
if (charge->current > 0 &&
available_charge[supplier][port].current == 0)
clear_override = 1;
#ifdef CONFIG_USB_PD_LOGGING
save_log[port] = 1;
#endif
break;
case CHANGE_DUALROLE:
/*
* Ignore all except for transition to non-dualrole,
* which may occur some time after we see a charge
*/
#ifndef CONFIG_CHARGE_MANAGER_DRP_CHARGING
if (dualrole_capability[port] != CAP_DEDICATED)
#endif
return;
/* Clear override only if a charge is present on the port */
for (i = 0; i < CHARGE_SUPPLIER_COUNT; ++i)
if (available_charge[i][port].current > 0) {
clear_override = 1;
break;
}
/*
* If there is no charge present on the port, the dualrole
* change is meaningless to charge_manager.
*/
if (!clear_override)
return;
break;
}
/* Remove override when a charger is plugged */
if (clear_override && override_port != port
#ifndef CONFIG_CHARGE_MANAGER_DRP_CHARGING
/* only remove override when it's a dedicated charger */
&& dualrole_capability[port] == CAP_DEDICATED
#endif
) {
override_port = OVERRIDE_OFF;
if (delayed_override_port != OVERRIDE_OFF) {
delayed_override_port = OVERRIDE_OFF;
hook_call_deferred(
charge_override_timeout,
-1);
}
}
if (change == CHANGE_CHARGE) {
available_charge[supplier][port].current = charge->current;
available_charge[supplier][port].voltage = charge->voltage;
registration_time[port] = get_time();
/*
* If we have a charge on our delayed override port within
* the deadline, make it our override port.
*/
if (port == delayed_override_port && charge->current > 0 &&
pd_get_role(delayed_override_port) == PD_ROLE_SINK &&
get_time().val < delayed_override_deadline.val) {
delayed_override_port = OVERRIDE_OFF;
hook_call_deferred(charge_override_timeout, -1);
charge_manager_set_override(port);
}
}
/*
* Don't call charge_manager_refresh unless all ports +
* suppliers have reported in. We don't want to make changes
* to our charge port until we are certain we know what is
* attached.
*/
if (charge_manager_is_seeded())
hook_call_deferred(charge_manager_refresh, 0);
}