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usb_c: Transition to Sink Ready on sender response timeout

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Transition to pe_snk_ready state from pe_drs_send_swap_run,
on sender response timeout

Signed-off-by: Sam Hurst <sbh1187@gmail.com>
This commit is contained in:
Sam Hurst 2022-12-23 14:36:59 -08:00 committed by Carles Cufí
parent 24e18d46f1
commit 3af2752680
3 changed files with 39 additions and 6 deletions
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4
include/zephyr/usb_c/usbc.h
View file

@ -109,6 +109,10 @@ enum usbc_policy_notify_t {
POWER_CHANGE_1A5,
/** Sink SubPower state a 5V / 3A */
POWER_CHANGE_3A0,
/** Sender Response Timeout */
SENDER_RESPONSE_TIMEOUT,
/** Source Capabilities Received */
SOURCE_CAPABILITIES_RECEIVED,
};
/**

5
subsys/usb/usb_c/usbc_pe_common.c
View file

@ -702,10 +702,9 @@ void pe_drs_send_swap_run(void *obj)
return;
}
/* Transition to PE_SNK_READY on SenderResponseTimer timeout */
if (usbc_timer_expired(&pe->pd_t_sender_response)) {
/* Protocol Error */
policy_notify(dev, PROTOCOL_ERROR);
pe_send_soft_reset(dev, PD_PACKET_SOP);
pe_set_state(dev, PE_SNK_READY);
}
}

36
subsys/usb/usb_c/usbc_pe_snk_states.c
View file

@ -177,6 +177,9 @@ void pe_snk_evaluate_capability_entry(void *obj)
LOG_INF("PE_SNK_Evaluate_Capability");
/* Inform the DPM of the reception of the source capabilities */
policy_notify(dev, SOURCE_CAPABILITIES_RECEIVED);
header = prl_rx->emsg.header;
/* Reset Hard Reset counter to zero */
@ -606,7 +609,12 @@ void pe_snk_get_source_cap_entry(void *obj)
LOG_INF("PE_SNK_Get_Source_Cap");
/* Send a Get_Source_Cap Message */
/*
* On entry to the PE_SNK_Get_Source_Cap state the Policy Engine
* Shall request the Protocol Layer to send a get Source
* Capabilities message in order to retrieve the Source’s
* capabilities.
*/
pe_send_ctrl_msg(dev, PD_PACKET_SOP, PD_CTRL_GET_SOURCE_CAP);
}
@ -619,12 +627,34 @@ void pe_snk_get_source_cap_run(void *obj)
const struct device *dev = pe->dev;
struct usbc_port_data *data = dev->data;
struct protocol_layer_rx_t *prl_rx = data->prl_rx;
union pd_header header;
/* Wait until message is sent or dropped */
if (atomic_test_and_clear_bit(pe->flags, PE_FLAGS_TX_COMPLETE)) {
/* The Policy Engine Shall then start the SenderResponseTimer. */
usbc_timer_start(&pe->pd_t_sender_response);
}
/*
* The Policy Engine Shall transition to the PE_SNK_Evaluate_Capability
* State when:
* 1: In SPR Mode and SPR Source Capabilities were requested and
* a Source_Capabilities Message is received
*/
else if (atomic_test_and_clear_bit(pe->flags, PE_FLAGS_MSG_RECEIVED)) {
header = prl_rx->emsg.header;
if (received_control_message(dev, header, PD_DATA_SOURCE_CAP)) {
pe_set_state(dev, PE_SNK_EVALUATE_CAPABILITY);
}
}
/*
* The Policy Engine Shall transition to the PE_SNK_Ready state when:
* 1: The SenderResponseTimer times out.
*/
else if (usbc_timer_expired(&pe->pd_t_sender_response)) {
pe_set_state(dev, PE_SNK_READY);
} else if (atomic_test_and_clear_bit(pe->flags, PE_FLAGS_MSG_DISCARDED)) {
pe_send_soft_reset(dev, prl_rx->emsg.type);
/* Inform the DPM of the sender response timeout */
policy_notify(dev, SENDER_RESPONSE_TIMEOUT);
}
}