2017-04-27 15:09:56 -06:00
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/*
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* Copyright 2015-2017 Google, Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* USB Power Delivery protocol stack.
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*/
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#include <linux/completion.h>
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#include <linux/debugfs.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/proc_fs.h>
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#include <linux/sched/clock.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/usb/typec.h>
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#include <linux/workqueue.h>
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#include "pd.h"
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#include "pd_vdo.h"
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#include "pd_bdo.h"
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#include "tcpm.h"
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#define FOREACH_STATE(S) \
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S(INVALID_STATE), \
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S(DRP_TOGGLING), \
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S(SRC_UNATTACHED), \
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S(SRC_ATTACH_WAIT), \
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S(SRC_ATTACHED), \
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S(SRC_STARTUP), \
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S(SRC_SEND_CAPABILITIES), \
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S(SRC_NEGOTIATE_CAPABILITIES), \
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S(SRC_TRANSITION_SUPPLY), \
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S(SRC_READY), \
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S(SRC_WAIT_NEW_CAPABILITIES), \
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\
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S(SNK_UNATTACHED), \
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S(SNK_ATTACH_WAIT), \
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S(SNK_DEBOUNCED), \
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S(SNK_ATTACHED), \
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S(SNK_STARTUP), \
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S(SNK_DISCOVERY), \
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S(SNK_DISCOVERY_DEBOUNCE), \
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S(SNK_DISCOVERY_DEBOUNCE_DONE), \
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S(SNK_WAIT_CAPABILITIES), \
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S(SNK_NEGOTIATE_CAPABILITIES), \
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S(SNK_TRANSITION_SINK), \
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S(SNK_TRANSITION_SINK_VBUS), \
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S(SNK_READY), \
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\
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S(ACC_UNATTACHED), \
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S(DEBUG_ACC_ATTACHED), \
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S(AUDIO_ACC_ATTACHED), \
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S(AUDIO_ACC_DEBOUNCE), \
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\
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S(HARD_RESET_SEND), \
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S(HARD_RESET_START), \
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S(SRC_HARD_RESET_VBUS_OFF), \
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S(SRC_HARD_RESET_VBUS_ON), \
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S(SNK_HARD_RESET_SINK_OFF), \
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S(SNK_HARD_RESET_WAIT_VBUS), \
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S(SNK_HARD_RESET_SINK_ON), \
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\
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S(SOFT_RESET), \
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S(SOFT_RESET_SEND), \
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\
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S(DR_SWAP_ACCEPT), \
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S(DR_SWAP_SEND), \
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S(DR_SWAP_SEND_TIMEOUT), \
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S(DR_SWAP_CANCEL), \
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S(DR_SWAP_CHANGE_DR), \
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\
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S(PR_SWAP_ACCEPT), \
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S(PR_SWAP_SEND), \
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S(PR_SWAP_SEND_TIMEOUT), \
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S(PR_SWAP_CANCEL), \
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S(PR_SWAP_START), \
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S(PR_SWAP_SRC_SNK_TRANSITION_OFF), \
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S(PR_SWAP_SRC_SNK_SOURCE_OFF), \
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S(PR_SWAP_SRC_SNK_SINK_ON), \
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S(PR_SWAP_SNK_SRC_SINK_OFF), \
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S(PR_SWAP_SNK_SRC_SOURCE_ON), \
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\
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S(VCONN_SWAP_ACCEPT), \
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S(VCONN_SWAP_SEND), \
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S(VCONN_SWAP_SEND_TIMEOUT), \
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S(VCONN_SWAP_CANCEL), \
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S(VCONN_SWAP_START), \
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S(VCONN_SWAP_WAIT_FOR_VCONN), \
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S(VCONN_SWAP_TURN_ON_VCONN), \
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S(VCONN_SWAP_TURN_OFF_VCONN), \
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\
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S(SNK_TRY), \
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S(SNK_TRY_WAIT), \
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S(SRC_TRYWAIT), \
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S(SRC_TRYWAIT_UNATTACHED), \
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\
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S(SRC_TRY), \
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S(SRC_TRY_DEBOUNCE), \
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S(SNK_TRYWAIT), \
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S(SNK_TRYWAIT_DEBOUNCE), \
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S(SNK_TRYWAIT_VBUS), \
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S(BIST_RX), \
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\
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S(ERROR_RECOVERY), \
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S(ERROR_RECOVERY_WAIT_OFF)
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#define GENERATE_ENUM(e) e
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#define GENERATE_STRING(s) #s
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enum tcpm_state {
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FOREACH_STATE(GENERATE_ENUM)
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};
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static const char * const tcpm_states[] = {
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FOREACH_STATE(GENERATE_STRING)
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};
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enum vdm_states {
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VDM_STATE_ERR_BUSY = -3,
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VDM_STATE_ERR_SEND = -2,
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VDM_STATE_ERR_TMOUT = -1,
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VDM_STATE_DONE = 0,
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/* Anything >0 represents an active state */
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VDM_STATE_READY = 1,
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VDM_STATE_BUSY = 2,
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VDM_STATE_WAIT_RSP_BUSY = 3,
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};
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enum pd_msg_request {
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PD_MSG_NONE = 0,
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PD_MSG_CTRL_REJECT,
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PD_MSG_CTRL_WAIT,
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PD_MSG_DATA_SINK_CAP,
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PD_MSG_DATA_SOURCE_CAP,
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};
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/* Events from low level driver */
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#define TCPM_CC_EVENT BIT(0)
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#define TCPM_VBUS_EVENT BIT(1)
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#define TCPM_RESET_EVENT BIT(2)
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#define LOG_BUFFER_ENTRIES 1024
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#define LOG_BUFFER_ENTRY_SIZE 128
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/* Alternate mode support */
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#define SVID_DISCOVERY_MAX 16
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struct pd_mode_data {
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int svid_index; /* current SVID index */
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int nsvids;
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u16 svids[SVID_DISCOVERY_MAX];
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int altmodes; /* number of alternate modes */
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struct typec_altmode_desc altmode_desc[SVID_DISCOVERY_MAX];
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};
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struct tcpm_port {
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struct device *dev;
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struct mutex lock; /* tcpm state machine lock */
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struct workqueue_struct *wq;
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struct typec_capability typec_caps;
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struct typec_port *typec_port;
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struct tcpc_dev *tcpc;
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enum typec_role vconn_role;
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enum typec_role pwr_role;
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enum typec_data_role data_role;
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enum typec_pwr_opmode pwr_opmode;
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struct usb_pd_identity partner_ident;
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struct typec_partner_desc partner_desc;
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struct typec_partner *partner;
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enum typec_cc_status cc_req;
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enum typec_cc_status cc1;
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enum typec_cc_status cc2;
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enum typec_cc_polarity polarity;
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bool attached;
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bool connected;
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bool vbus_present;
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bool vbus_never_low;
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bool vbus_source;
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bool vbus_charge;
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bool send_discover;
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bool op_vsafe5v;
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int try_role;
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int try_snk_count;
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int try_src_count;
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enum pd_msg_request queued_message;
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enum tcpm_state enter_state;
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enum tcpm_state prev_state;
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enum tcpm_state state;
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enum tcpm_state delayed_state;
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unsigned long delayed_runtime;
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unsigned long delay_ms;
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spinlock_t pd_event_lock;
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u32 pd_events;
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struct work_struct event_work;
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struct delayed_work state_machine;
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struct delayed_work vdm_state_machine;
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bool state_machine_running;
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struct completion tx_complete;
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enum tcpm_transmit_status tx_status;
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struct mutex swap_lock; /* swap command lock */
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bool swap_pending;
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struct completion swap_complete;
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int swap_status;
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unsigned int message_id;
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unsigned int caps_count;
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unsigned int hard_reset_count;
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bool pd_capable;
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bool explicit_contract;
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unsigned int rx_msgid;
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/* Partner capabilities/requests */
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u32 sink_request;
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u32 source_caps[PDO_MAX_OBJECTS];
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unsigned int nr_source_caps;
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u32 sink_caps[PDO_MAX_OBJECTS];
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unsigned int nr_sink_caps;
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/* Local capabilities */
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u32 src_pdo[PDO_MAX_OBJECTS];
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unsigned int nr_src_pdo;
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u32 snk_pdo[PDO_MAX_OBJECTS];
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unsigned int nr_snk_pdo;
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u32 snk_vdo[VDO_MAX_OBJECTS];
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unsigned int nr_snk_vdo;
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unsigned int max_snk_mv;
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unsigned int max_snk_ma;
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unsigned int max_snk_mw;
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unsigned int operating_snk_mw;
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/* Requested current / voltage */
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u32 current_limit;
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u32 supply_voltage;
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u32 bist_request;
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/* PD state for Vendor Defined Messages */
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enum vdm_states vdm_state;
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u32 vdm_retries;
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/* next Vendor Defined Message to send */
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u32 vdo_data[VDO_MAX_SIZE];
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u8 vdo_count;
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/* VDO to retry if UFP responder replied busy */
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u32 vdo_retry;
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/* Alternate mode data */
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struct pd_mode_data mode_data;
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struct typec_altmode *partner_altmode[SVID_DISCOVERY_MAX];
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struct typec_altmode *port_altmode[SVID_DISCOVERY_MAX];
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#ifdef CONFIG_DEBUG_FS
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struct dentry *dentry;
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struct mutex logbuffer_lock; /* log buffer access lock */
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int logbuffer_head;
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int logbuffer_tail;
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u8 *logbuffer[LOG_BUFFER_ENTRIES];
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#endif
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};
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struct pd_rx_event {
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struct work_struct work;
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struct tcpm_port *port;
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struct pd_message msg;
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};
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#define tcpm_cc_is_sink(cc) \
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((cc) == TYPEC_CC_RP_DEF || (cc) == TYPEC_CC_RP_1_5 || \
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(cc) == TYPEC_CC_RP_3_0)
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#define tcpm_port_is_sink(port) \
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((tcpm_cc_is_sink((port)->cc1) && !tcpm_cc_is_sink((port)->cc2)) || \
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(tcpm_cc_is_sink((port)->cc2) && !tcpm_cc_is_sink((port)->cc1)))
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#define tcpm_cc_is_source(cc) ((cc) == TYPEC_CC_RD)
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#define tcpm_cc_is_audio(cc) ((cc) == TYPEC_CC_RA)
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#define tcpm_cc_is_open(cc) ((cc) == TYPEC_CC_OPEN)
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#define tcpm_port_is_source(port) \
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((tcpm_cc_is_source((port)->cc1) && \
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!tcpm_cc_is_source((port)->cc2)) || \
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(tcpm_cc_is_source((port)->cc2) && \
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!tcpm_cc_is_source((port)->cc1)))
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#define tcpm_port_is_debug(port) \
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(tcpm_cc_is_source((port)->cc1) && tcpm_cc_is_source((port)->cc2))
|
|
|
|
|
|
|
|
|
|
#define tcpm_port_is_audio(port) \
|
|
|
|
|
(tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
|
|
|
|
|
|
|
|
|
|
#define tcpm_port_is_audio_detached(port) \
|
|
|
|
|
((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
|
|
|
|
|
(tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
|
|
|
|
|
|
|
|
|
|
#define tcpm_try_snk(port) \
|
|
|
|
|
((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK)
|
|
|
|
|
|
|
|
|
|
#define tcpm_try_src(port) \
|
|
|
|
|
((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE)
|
|
|
|
|
|
|
|
|
|
static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->try_role == TYPEC_SINK)
|
|
|
|
|
return SNK_UNATTACHED;
|
|
|
|
|
else if (port->try_role == TYPEC_SOURCE)
|
|
|
|
|
return SRC_UNATTACHED;
|
|
|
|
|
else if (port->tcpc->config->default_role == TYPEC_SINK)
|
|
|
|
|
return SNK_UNATTACHED;
|
|
|
|
|
return SRC_UNATTACHED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline
|
|
|
|
|
struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
|
|
|
|
|
{
|
|
|
|
|
return container_of(cap, struct tcpm_port, typec_caps);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool tcpm_port_is_disconnected(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
|
|
|
|
|
port->cc2 == TYPEC_CC_OPEN) ||
|
|
|
|
|
(port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
|
|
|
|
|
port->cc1 == TYPEC_CC_OPEN) ||
|
|
|
|
|
(port->polarity == TYPEC_POLARITY_CC2 &&
|
|
|
|
|
port->cc2 == TYPEC_CC_OPEN)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Logging
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
|
|
|
|
|
static bool tcpm_log_full(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
return port->logbuffer_tail ==
|
|
|
|
|
(port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
|
|
|
|
|
{
|
|
|
|
|
char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
|
|
|
|
|
u64 ts_nsec = local_clock();
|
|
|
|
|
unsigned long rem_nsec;
|
|
|
|
|
|
|
|
|
|
if (!port->logbuffer[port->logbuffer_head]) {
|
|
|
|
|
port->logbuffer[port->logbuffer_head] =
|
|
|
|
|
kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
|
|
|
|
|
if (!port->logbuffer[port->logbuffer_head])
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->logbuffer_lock);
|
|
|
|
|
|
|
|
|
|
if (tcpm_log_full(port)) {
|
|
|
|
|
port->logbuffer_head = max(port->logbuffer_head - 1, 0);
|
|
|
|
|
strcpy(tmpbuffer, "overflow");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (port->logbuffer_head < 0 ||
|
|
|
|
|
port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
|
|
|
|
|
dev_warn(port->dev,
|
|
|
|
|
"Bad log buffer index %d\n", port->logbuffer_head);
|
|
|
|
|
goto abort;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!port->logbuffer[port->logbuffer_head]) {
|
|
|
|
|
dev_warn(port->dev,
|
|
|
|
|
"Log buffer index %d is NULL\n", port->logbuffer_head);
|
|
|
|
|
goto abort;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
rem_nsec = do_div(ts_nsec, 1000000000);
|
|
|
|
|
scnprintf(port->logbuffer[port->logbuffer_head],
|
|
|
|
|
LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
|
|
|
|
|
(unsigned long)ts_nsec, rem_nsec / 1000,
|
|
|
|
|
tmpbuffer);
|
|
|
|
|
port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
|
|
|
|
|
|
|
|
|
|
abort:
|
|
|
|
|
mutex_unlock(&port->logbuffer_lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_log(struct tcpm_port *port, const char *fmt, ...)
|
|
|
|
|
{
|
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
|
|
/* Do not log while disconnected and unattached */
|
|
|
|
|
if (tcpm_port_is_disconnected(port) &&
|
|
|
|
|
(port->state == SRC_UNATTACHED || port->state == SNK_UNATTACHED ||
|
|
|
|
|
port->state == DRP_TOGGLING))
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
va_start(args, fmt);
|
|
|
|
|
_tcpm_log(port, fmt, args);
|
|
|
|
|
va_end(args);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...)
|
|
|
|
|
{
|
|
|
|
|
va_list args;
|
|
|
|
|
|
|
|
|
|
va_start(args, fmt);
|
|
|
|
|
_tcpm_log(port, fmt, args);
|
|
|
|
|
va_end(args);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_log_source_caps(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < port->nr_source_caps; i++) {
|
|
|
|
|
u32 pdo = port->source_caps[i];
|
|
|
|
|
enum pd_pdo_type type = pdo_type(pdo);
|
|
|
|
|
char msg[64];
|
|
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
|
case PDO_TYPE_FIXED:
|
|
|
|
|
scnprintf(msg, sizeof(msg),
|
|
|
|
|
"%u mV, %u mA [%s%s%s%s%s%s]",
|
|
|
|
|
pdo_fixed_voltage(pdo),
|
|
|
|
|
pdo_max_current(pdo),
|
|
|
|
|
(pdo & PDO_FIXED_DUAL_ROLE) ?
|
|
|
|
|
"R" : "",
|
|
|
|
|
(pdo & PDO_FIXED_SUSPEND) ?
|
|
|
|
|
"S" : "",
|
|
|
|
|
(pdo & PDO_FIXED_HIGHER_CAP) ?
|
|
|
|
|
"H" : "",
|
|
|
|
|
(pdo & PDO_FIXED_USB_COMM) ?
|
|
|
|
|
"U" : "",
|
|
|
|
|
(pdo & PDO_FIXED_DATA_SWAP) ?
|
|
|
|
|
"D" : "",
|
|
|
|
|
(pdo & PDO_FIXED_EXTPOWER) ?
|
|
|
|
|
"E" : "");
|
|
|
|
|
break;
|
|
|
|
|
case PDO_TYPE_VAR:
|
|
|
|
|
scnprintf(msg, sizeof(msg),
|
|
|
|
|
"%u-%u mV, %u mA",
|
|
|
|
|
pdo_min_voltage(pdo),
|
|
|
|
|
pdo_max_voltage(pdo),
|
|
|
|
|
pdo_max_current(pdo));
|
|
|
|
|
break;
|
|
|
|
|
case PDO_TYPE_BATT:
|
|
|
|
|
scnprintf(msg, sizeof(msg),
|
|
|
|
|
"%u-%u mV, %u mW",
|
|
|
|
|
pdo_min_voltage(pdo),
|
|
|
|
|
pdo_max_voltage(pdo),
|
|
|
|
|
pdo_max_power(pdo));
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
strcpy(msg, "undefined");
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
tcpm_log(port, " PDO %d: type %d, %s",
|
|
|
|
|
i, type, msg);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_seq_show(struct seq_file *s, void *v)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = (struct tcpm_port *)s->private;
|
|
|
|
|
int tail;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->logbuffer_lock);
|
|
|
|
|
tail = port->logbuffer_tail;
|
|
|
|
|
while (tail != port->logbuffer_head) {
|
|
|
|
|
seq_printf(s, "%s\n", port->logbuffer[tail]);
|
|
|
|
|
tail = (tail + 1) % LOG_BUFFER_ENTRIES;
|
|
|
|
|
}
|
|
|
|
|
if (!seq_has_overflowed(s))
|
|
|
|
|
port->logbuffer_tail = tail;
|
|
|
|
|
mutex_unlock(&port->logbuffer_lock);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_debug_open(struct inode *inode, struct file *file)
|
|
|
|
|
{
|
|
|
|
|
return single_open(file, tcpm_seq_show, inode->i_private);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static const struct file_operations tcpm_debug_operations = {
|
|
|
|
|
.open = tcpm_debug_open,
|
|
|
|
|
.llseek = seq_lseek,
|
|
|
|
|
.read = seq_read,
|
|
|
|
|
.release = single_release,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static struct dentry *rootdir;
|
|
|
|
|
|
|
|
|
|
static int tcpm_debugfs_init(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
mutex_init(&port->logbuffer_lock);
|
|
|
|
|
/* /sys/kernel/debug/tcpm/usbcX */
|
|
|
|
|
if (!rootdir) {
|
|
|
|
|
rootdir = debugfs_create_dir("tcpm", NULL);
|
|
|
|
|
if (!rootdir)
|
|
|
|
|
return -ENOMEM;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
port->dentry = debugfs_create_file(dev_name(port->dev),
|
|
|
|
|
S_IFREG | 0444, rootdir,
|
|
|
|
|
port, &tcpm_debug_operations);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_debugfs_exit(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
debugfs_remove(port->dentry);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
|
|
|
|
static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
|
|
|
|
|
static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
|
|
|
|
|
static void tcpm_log_source_caps(struct tcpm_port *port) { }
|
|
|
|
|
static int tcpm_debugfs_init(const struct tcpm_port *port) { return 0; }
|
|
|
|
|
static void tcpm_debugfs_exit(const struct tcpm_port *port) { }
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_transmit(struct tcpm_port *port,
|
|
|
|
|
enum tcpm_transmit_type type,
|
|
|
|
|
const struct pd_message *msg)
|
|
|
|
|
{
|
|
|
|
|
unsigned long timeout;
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (msg)
|
|
|
|
|
tcpm_log(port, "PD TX, header: %#x", le16_to_cpu(msg->header));
|
|
|
|
|
else
|
|
|
|
|
tcpm_log(port, "PD TX, type: %#x", type);
|
|
|
|
|
|
|
|
|
|
reinit_completion(&port->tx_complete);
|
|
|
|
|
ret = port->tcpc->pd_transmit(port->tcpc, type, msg);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
timeout = wait_for_completion_timeout(&port->tx_complete,
|
|
|
|
|
msecs_to_jiffies(PD_T_TCPC_TX_TIMEOUT));
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
if (!timeout)
|
|
|
|
|
return -ETIMEDOUT;
|
|
|
|
|
|
|
|
|
|
switch (port->tx_status) {
|
|
|
|
|
case TCPC_TX_SUCCESS:
|
|
|
|
|
port->message_id = (port->message_id + 1) & PD_HEADER_ID_MASK;
|
|
|
|
|
return 0;
|
|
|
|
|
case TCPC_TX_DISCARDED:
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
case TCPC_TX_FAILED:
|
|
|
|
|
default:
|
|
|
|
|
return -EIO;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void tcpm_pd_transmit_complete(struct tcpm_port *port,
|
|
|
|
|
enum tcpm_transmit_status status)
|
|
|
|
|
{
|
|
|
|
|
tcpm_log(port, "PD TX complete, status: %u", status);
|
|
|
|
|
port->tx_status = status;
|
|
|
|
|
complete(&port->tx_complete);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_pd_transmit_complete);
|
|
|
|
|
|
|
|
|
|
static int tcpm_mux_set(struct tcpm_port *port, enum tcpc_mux_mode mode,
|
|
|
|
|
enum tcpc_usb_switch config)
|
|
|
|
|
{
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Requesting mux mode %d, config %d, polarity %d",
|
|
|
|
|
mode, config, port->polarity);
|
|
|
|
|
|
|
|
|
|
if (port->tcpc->mux)
|
|
|
|
|
ret = port->tcpc->mux->set(port->tcpc->mux, mode, config,
|
|
|
|
|
port->polarity);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_polarity(struct tcpm_port *port,
|
|
|
|
|
enum typec_cc_polarity polarity)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "polarity %d", polarity);
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_polarity(port->tcpc, polarity);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->polarity = polarity;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_vconn(struct tcpm_port *port, bool enable)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "vconn:=%d", enable);
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_vconn(port->tcpc, enable);
|
|
|
|
|
if (!ret) {
|
|
|
|
|
port->vconn_role = enable ? TYPEC_SOURCE : TYPEC_SINK;
|
|
|
|
|
typec_set_vconn_role(port->typec_port, port->vconn_role);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static u32 tcpm_get_current_limit(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum typec_cc_status cc;
|
|
|
|
|
u32 limit;
|
|
|
|
|
|
|
|
|
|
cc = port->polarity ? port->cc2 : port->cc1;
|
|
|
|
|
switch (cc) {
|
|
|
|
|
case TYPEC_CC_RP_1_5:
|
|
|
|
|
limit = 1500;
|
|
|
|
|
break;
|
|
|
|
|
case TYPEC_CC_RP_3_0:
|
|
|
|
|
limit = 3000;
|
|
|
|
|
break;
|
|
|
|
|
case TYPEC_CC_RP_DEF:
|
|
|
|
|
default:
|
|
|
|
|
limit = 0;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return limit;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_current_limit(struct tcpm_port *port, u32 max_ma, u32 mv)
|
|
|
|
|
{
|
|
|
|
|
int ret = -EOPNOTSUPP;
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Setting voltage/current limit %u mV %u mA", mv, max_ma);
|
|
|
|
|
|
|
|
|
|
if (port->tcpc->set_current_limit)
|
|
|
|
|
ret = port->tcpc->set_current_limit(port->tcpc, max_ma, mv);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Determine RP value to set based on maximum current supported
|
|
|
|
|
* by a port if configured as source.
|
|
|
|
|
* Returns CC value to report to link partner.
|
|
|
|
|
*/
|
|
|
|
|
static enum typec_cc_status tcpm_rp_cc(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
const u32 *src_pdo = port->src_pdo;
|
|
|
|
|
int nr_pdo = port->nr_src_pdo;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Search for first entry with matching voltage.
|
|
|
|
|
* It should report the maximum supported current.
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < nr_pdo; i++) {
|
|
|
|
|
const u32 pdo = src_pdo[i];
|
|
|
|
|
|
|
|
|
|
if (pdo_type(pdo) == PDO_TYPE_FIXED &&
|
|
|
|
|
pdo_fixed_voltage(pdo) == 5000) {
|
|
|
|
|
unsigned int curr = pdo_max_current(pdo);
|
|
|
|
|
|
|
|
|
|
if (curr >= 3000)
|
|
|
|
|
return TYPEC_CC_RP_3_0;
|
|
|
|
|
else if (curr >= 1500)
|
|
|
|
|
return TYPEC_CC_RP_1_5;
|
|
|
|
|
return TYPEC_CC_RP_DEF;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return TYPEC_CC_RP_DEF;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_attached_state(struct tcpm_port *port, bool attached)
|
|
|
|
|
{
|
|
|
|
|
return port->tcpc->set_roles(port->tcpc, attached, port->pwr_role,
|
|
|
|
|
port->data_role);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_roles(struct tcpm_port *port, bool attached,
|
|
|
|
|
enum typec_role role, enum typec_data_role data)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (data == TYPEC_HOST)
|
|
|
|
|
ret = tcpm_mux_set(port, TYPEC_MUX_USB,
|
|
|
|
|
TCPC_USB_SWITCH_CONNECT);
|
|
|
|
|
else
|
|
|
|
|
ret = tcpm_mux_set(port, TYPEC_MUX_NONE,
|
|
|
|
|
TCPC_USB_SWITCH_DISCONNECT);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_roles(port->tcpc, attached, role, data);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->pwr_role = role;
|
|
|
|
|
port->data_role = data;
|
|
|
|
|
typec_set_data_role(port->typec_port, data);
|
|
|
|
|
typec_set_pwr_role(port->typec_port, role);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_pwr_role(struct tcpm_port *port, enum typec_role role)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_roles(port->tcpc, true, role,
|
|
|
|
|
port->data_role);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->pwr_role = role;
|
|
|
|
|
typec_set_pwr_role(port->typec_port, role);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_send_source_caps(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
struct pd_message msg;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
|
if (!port->nr_src_pdo) {
|
|
|
|
|
/* No source capabilities defined, sink only */
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id, 0);
|
|
|
|
|
} else {
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id,
|
|
|
|
|
port->nr_src_pdo);
|
|
|
|
|
}
|
|
|
|
|
for (i = 0; i < port->nr_src_pdo; i++)
|
|
|
|
|
msg.payload[i] = cpu_to_le32(port->src_pdo[i]);
|
|
|
|
|
|
|
|
|
|
return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_send_sink_caps(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
struct pd_message msg;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
|
if (!port->nr_snk_pdo) {
|
|
|
|
|
/* No sink capabilities defined, source only */
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_CTRL_REJECT,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id, 0);
|
|
|
|
|
} else {
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id,
|
|
|
|
|
port->nr_snk_pdo);
|
|
|
|
|
}
|
|
|
|
|
for (i = 0; i < port->nr_snk_pdo; i++)
|
|
|
|
|
msg.payload[i] = cpu_to_le32(port->snk_pdo[i]);
|
|
|
|
|
|
|
|
|
|
return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_set_state(struct tcpm_port *port, enum tcpm_state state,
|
|
|
|
|
unsigned int delay_ms)
|
|
|
|
|
{
|
|
|
|
|
if (delay_ms) {
|
|
|
|
|
tcpm_log(port, "pending state change %s -> %s @ %u ms",
|
|
|
|
|
tcpm_states[port->state], tcpm_states[state],
|
|
|
|
|
delay_ms);
|
|
|
|
|
port->delayed_state = state;
|
|
|
|
|
mod_delayed_work(port->wq, &port->state_machine,
|
|
|
|
|
msecs_to_jiffies(delay_ms));
|
|
|
|
|
port->delayed_runtime = jiffies + msecs_to_jiffies(delay_ms);
|
|
|
|
|
port->delay_ms = delay_ms;
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_log(port, "state change %s -> %s",
|
|
|
|
|
tcpm_states[port->state], tcpm_states[state]);
|
|
|
|
|
port->delayed_state = INVALID_STATE;
|
|
|
|
|
port->prev_state = port->state;
|
|
|
|
|
port->state = state;
|
|
|
|
|
/*
|
|
|
|
|
* Don't re-queue the state machine work item if we're currently
|
|
|
|
|
* in the state machine and we're immediately changing states.
|
|
|
|
|
* tcpm_state_machine_work() will continue running the state
|
|
|
|
|
* machine.
|
|
|
|
|
*/
|
|
|
|
|
if (!port->state_machine_running)
|
|
|
|
|
mod_delayed_work(port->wq, &port->state_machine, 0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_set_state_cond(struct tcpm_port *port, enum tcpm_state state,
|
|
|
|
|
unsigned int delay_ms)
|
|
|
|
|
{
|
|
|
|
|
if (port->enter_state == port->state)
|
|
|
|
|
tcpm_set_state(port, state, delay_ms);
|
|
|
|
|
else
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"skipped %sstate change %s -> %s [%u ms], context state %s",
|
|
|
|
|
delay_ms ? "delayed " : "",
|
|
|
|
|
tcpm_states[port->state], tcpm_states[state],
|
|
|
|
|
delay_ms, tcpm_states[port->enter_state]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_queue_message(struct tcpm_port *port,
|
|
|
|
|
enum pd_msg_request message)
|
|
|
|
|
{
|
|
|
|
|
port->queued_message = message;
|
|
|
|
|
mod_delayed_work(port->wq, &port->state_machine, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* VDM/VDO handling functions
|
|
|
|
|
*/
|
|
|
|
|
static void tcpm_queue_vdm(struct tcpm_port *port, const u32 header,
|
|
|
|
|
const u32 *data, int cnt)
|
|
|
|
|
{
|
|
|
|
|
port->vdo_count = cnt + 1;
|
|
|
|
|
port->vdo_data[0] = header;
|
|
|
|
|
memcpy(&port->vdo_data[1], data, sizeof(u32) * cnt);
|
|
|
|
|
/* Set ready, vdm state machine will actually send */
|
|
|
|
|
port->vdm_retries = 0;
|
|
|
|
|
port->vdm_state = VDM_STATE_READY;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void svdm_consume_identity(struct tcpm_port *port, const __le32 *payload,
|
|
|
|
|
int cnt)
|
|
|
|
|
{
|
|
|
|
|
u32 vdo = le32_to_cpu(payload[VDO_INDEX_IDH]);
|
|
|
|
|
u32 product = le32_to_cpu(payload[VDO_INDEX_PRODUCT]);
|
|
|
|
|
|
|
|
|
|
memset(&port->mode_data, 0, sizeof(port->mode_data));
|
|
|
|
|
|
|
|
|
|
#if 0 /* Not really a match */
|
|
|
|
|
switch (PD_IDH_PTYPE(vdo)) {
|
|
|
|
|
case IDH_PTYPE_UNDEF:
|
|
|
|
|
port->partner.type = TYPEC_PARTNER_NONE; /* no longer exists */
|
|
|
|
|
break;
|
|
|
|
|
case IDH_PTYPE_HUB:
|
|
|
|
|
break;
|
|
|
|
|
case IDH_PTYPE_PERIPH:
|
|
|
|
|
break;
|
|
|
|
|
case IDH_PTYPE_PCABLE:
|
|
|
|
|
break;
|
|
|
|
|
case IDH_PTYPE_ACABLE:
|
|
|
|
|
break;
|
|
|
|
|
case IDH_PTYPE_AMA:
|
|
|
|
|
port->partner.type = TYPEC_PARTNER_ALTMODE;
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
port->partner_ident.id_header = vdo;
|
|
|
|
|
port->partner_ident.cert_stat = le32_to_cpu(payload[VDO_INDEX_CSTAT]);
|
|
|
|
|
port->partner_ident.product = product;
|
|
|
|
|
|
|
|
|
|
typec_partner_set_identity(port->partner);
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Identity: %04x:%04x.%04x",
|
|
|
|
|
PD_IDH_VID(vdo),
|
|
|
|
|
PD_PRODUCT_PID(product), product & 0xffff);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool svdm_consume_svids(struct tcpm_port *port, const __le32 *payload,
|
|
|
|
|
int cnt)
|
|
|
|
|
{
|
|
|
|
|
struct pd_mode_data *pmdata = &port->mode_data;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 1; i < cnt; i++) {
|
|
|
|
|
u32 p = le32_to_cpu(payload[i]);
|
|
|
|
|
u16 svid;
|
|
|
|
|
|
|
|
|
|
svid = (p >> 16) & 0xffff;
|
|
|
|
|
if (!svid)
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
|
|
|
|
|
goto abort;
|
|
|
|
|
|
|
|
|
|
pmdata->svids[pmdata->nsvids++] = svid;
|
|
|
|
|
tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
|
|
|
|
|
|
|
|
|
|
svid = p & 0xffff;
|
|
|
|
|
if (!svid)
|
|
|
|
|
return false;
|
|
|
|
|
|
|
|
|
|
if (pmdata->nsvids >= SVID_DISCOVERY_MAX)
|
|
|
|
|
goto abort;
|
|
|
|
|
|
|
|
|
|
pmdata->svids[pmdata->nsvids++] = svid;
|
|
|
|
|
tcpm_log(port, "SVID %d: 0x%x", pmdata->nsvids, svid);
|
|
|
|
|
}
|
|
|
|
|
return true;
|
|
|
|
|
abort:
|
|
|
|
|
tcpm_log(port, "SVID_DISCOVERY_MAX(%d) too low!", SVID_DISCOVERY_MAX);
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void svdm_consume_modes(struct tcpm_port *port, const __le32 *payload,
|
|
|
|
|
int cnt)
|
|
|
|
|
{
|
|
|
|
|
struct pd_mode_data *pmdata = &port->mode_data;
|
|
|
|
|
struct typec_altmode_desc *paltmode;
|
|
|
|
|
struct typec_mode_desc *pmode;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
|
|
|
|
|
/* Already logged in svdm_consume_svids() */
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
paltmode = &pmdata->altmode_desc[pmdata->altmodes];
|
|
|
|
|
memset(paltmode, 0, sizeof(*paltmode));
|
|
|
|
|
|
|
|
|
|
paltmode->svid = pmdata->svids[pmdata->svid_index];
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, " Alternate mode %d: SVID 0x%04x",
|
|
|
|
|
pmdata->altmodes, paltmode->svid);
|
|
|
|
|
|
|
|
|
|
for (i = 1; i < cnt && paltmode->n_modes < ALTMODE_MAX_MODES; i++) {
|
|
|
|
|
pmode = &paltmode->modes[paltmode->n_modes];
|
|
|
|
|
memset(pmode, 0, sizeof(*pmode));
|
|
|
|
|
pmode->vdo = le32_to_cpu(payload[i]);
|
|
|
|
|
pmode->index = i - 1;
|
|
|
|
|
paltmode->n_modes++;
|
|
|
|
|
tcpm_log(port, " VDO %d: 0x%08x",
|
|
|
|
|
pmode->index, pmode->vdo);
|
|
|
|
|
}
|
|
|
|
|
port->partner_altmode[pmdata->altmodes] =
|
|
|
|
|
typec_partner_register_altmode(port->partner, paltmode);
|
|
|
|
|
if (port->partner_altmode[pmdata->altmodes] == NULL) {
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"Failed to register alternate modes for SVID 0x%04x",
|
|
|
|
|
paltmode->svid);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
pmdata->altmodes++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#define supports_modal(port) PD_IDH_MODAL_SUPP((port)->partner_ident.id_header)
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_svdm(struct tcpm_port *port, const __le32 *payload, int cnt,
|
|
|
|
|
u32 *response)
|
|
|
|
|
{
|
|
|
|
|
u32 p0 = le32_to_cpu(payload[0]);
|
|
|
|
|
int cmd_type = PD_VDO_CMDT(p0);
|
|
|
|
|
int cmd = PD_VDO_CMD(p0);
|
|
|
|
|
struct pd_mode_data *modep;
|
|
|
|
|
int rlen = 0;
|
|
|
|
|
u16 svid;
|
2017-05-09 10:04:58 -06:00
|
|
|
|
int i;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
|
|
|
|
|
p0, cmd_type, cmd, cnt);
|
|
|
|
|
|
|
|
|
|
modep = &port->mode_data;
|
|
|
|
|
|
|
|
|
|
switch (cmd_type) {
|
|
|
|
|
case CMDT_INIT:
|
|
|
|
|
switch (cmd) {
|
|
|
|
|
case CMD_DISCOVER_IDENT:
|
2017-05-09 10:04:58 -06:00
|
|
|
|
/* 6.4.4.3.1: Only respond as UFP (device) */
|
|
|
|
|
if (port->data_role == TYPEC_DEVICE &&
|
|
|
|
|
port->nr_snk_vdo) {
|
|
|
|
|
for (i = 0; i < port->nr_snk_vdo; i++)
|
|
|
|
|
response[i + 1]
|
|
|
|
|
= cpu_to_le32(port->snk_vdo[i]);
|
|
|
|
|
rlen = port->nr_snk_vdo + 1;
|
|
|
|
|
}
|
2017-04-27 15:09:56 -06:00
|
|
|
|
break;
|
|
|
|
|
case CMD_DISCOVER_SVID:
|
|
|
|
|
break;
|
|
|
|
|
case CMD_DISCOVER_MODES:
|
|
|
|
|
break;
|
|
|
|
|
case CMD_ENTER_MODE:
|
|
|
|
|
break;
|
|
|
|
|
case CMD_EXIT_MODE:
|
|
|
|
|
break;
|
|
|
|
|
case CMD_ATTENTION:
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (rlen >= 1) {
|
|
|
|
|
response[0] = p0 | VDO_CMDT(CMDT_RSP_ACK);
|
|
|
|
|
} else if (rlen == 0) {
|
|
|
|
|
response[0] = p0 | VDO_CMDT(CMDT_RSP_NAK);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
} else {
|
|
|
|
|
response[0] = p0 | VDO_CMDT(CMDT_RSP_BUSY);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case CMDT_RSP_ACK:
|
|
|
|
|
/* silently drop message if we are not connected */
|
|
|
|
|
if (!port->partner)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
|
case CMD_DISCOVER_IDENT:
|
|
|
|
|
/* 6.4.4.3.1 */
|
|
|
|
|
svdm_consume_identity(port, payload, cnt);
|
|
|
|
|
response[0] = VDO(USB_SID_PD, 1, CMD_DISCOVER_SVID);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
break;
|
|
|
|
|
case CMD_DISCOVER_SVID:
|
|
|
|
|
/* 6.4.4.3.2 */
|
|
|
|
|
if (svdm_consume_svids(port, payload, cnt)) {
|
|
|
|
|
response[0] = VDO(USB_SID_PD, 1,
|
|
|
|
|
CMD_DISCOVER_SVID);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
} else if (modep->nsvids && supports_modal(port)) {
|
|
|
|
|
response[0] = VDO(modep->svids[0], 1,
|
|
|
|
|
CMD_DISCOVER_MODES);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case CMD_DISCOVER_MODES:
|
|
|
|
|
/* 6.4.4.3.3 */
|
|
|
|
|
svdm_consume_modes(port, payload, cnt);
|
|
|
|
|
modep->svid_index++;
|
|
|
|
|
if (modep->svid_index < modep->nsvids) {
|
|
|
|
|
svid = modep->svids[modep->svid_index];
|
|
|
|
|
response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
|
|
|
|
|
rlen = 1;
|
|
|
|
|
} else {
|
|
|
|
|
#if 0
|
|
|
|
|
response[0] = pd_dfp_enter_mode(port, 0, 0);
|
|
|
|
|
if (response[0])
|
|
|
|
|
rlen = 1;
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case CMD_ENTER_MODE:
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return rlen;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_handle_vdm_request(struct tcpm_port *port,
|
|
|
|
|
const __le32 *payload, int cnt)
|
|
|
|
|
{
|
|
|
|
|
int rlen = 0;
|
|
|
|
|
u32 response[8] = { };
|
|
|
|
|
u32 p0 = le32_to_cpu(payload[0]);
|
|
|
|
|
|
|
|
|
|
if (port->vdm_state == VDM_STATE_BUSY) {
|
|
|
|
|
/* If UFP responded busy retry after timeout */
|
|
|
|
|
if (PD_VDO_CMDT(p0) == CMDT_RSP_BUSY) {
|
|
|
|
|
port->vdm_state = VDM_STATE_WAIT_RSP_BUSY;
|
|
|
|
|
port->vdo_retry = (p0 & ~VDO_CMDT_MASK) |
|
|
|
|
|
CMDT_INIT;
|
|
|
|
|
mod_delayed_work(port->wq, &port->vdm_state_machine,
|
|
|
|
|
msecs_to_jiffies(PD_T_VDM_BUSY));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
port->vdm_state = VDM_STATE_DONE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (PD_VDO_SVDM(p0))
|
|
|
|
|
rlen = tcpm_pd_svdm(port, payload, cnt, response);
|
|
|
|
|
#if 0
|
|
|
|
|
else
|
|
|
|
|
rlen = tcpm_pd_custom_vdm(port, cnt, payload, response);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (rlen > 0) {
|
|
|
|
|
tcpm_queue_vdm(port, response[0], &response[1], rlen - 1);
|
|
|
|
|
mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_send_vdm(struct tcpm_port *port, u32 vid, int cmd,
|
|
|
|
|
const u32 *data, int count)
|
|
|
|
|
{
|
|
|
|
|
u32 header;
|
|
|
|
|
|
|
|
|
|
if (WARN_ON(count > VDO_MAX_SIZE - 1))
|
|
|
|
|
count = VDO_MAX_SIZE - 1;
|
|
|
|
|
|
|
|
|
|
/* set VDM header with VID & CMD */
|
|
|
|
|
header = VDO(vid, ((vid & USB_SID_PD) == USB_SID_PD) ?
|
|
|
|
|
1 : (PD_VDO_CMD(cmd) <= CMD_ATTENTION), cmd);
|
|
|
|
|
tcpm_queue_vdm(port, header, data, count);
|
|
|
|
|
|
|
|
|
|
mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static unsigned int vdm_ready_timeout(u32 vdm_hdr)
|
|
|
|
|
{
|
|
|
|
|
unsigned int timeout;
|
|
|
|
|
int cmd = PD_VDO_CMD(vdm_hdr);
|
|
|
|
|
|
|
|
|
|
/* its not a structured VDM command */
|
|
|
|
|
if (!PD_VDO_SVDM(vdm_hdr))
|
|
|
|
|
return PD_T_VDM_UNSTRUCTURED;
|
|
|
|
|
|
|
|
|
|
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 vdm_run_state_machine(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
struct pd_message msg;
|
|
|
|
|
int i, res;
|
|
|
|
|
|
|
|
|
|
switch (port->vdm_state) {
|
|
|
|
|
case VDM_STATE_READY:
|
|
|
|
|
/* Only transmit VDM if attached */
|
|
|
|
|
if (!port->attached) {
|
|
|
|
|
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 (port->state != SRC_READY && port->state != SNK_READY)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Prepare and send VDM */
|
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_DATA_VENDOR_DEF,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id, port->vdo_count);
|
|
|
|
|
for (i = 0; i < port->vdo_count; i++)
|
|
|
|
|
msg.payload[i] = cpu_to_le32(port->vdo_data[i]);
|
|
|
|
|
res = tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
|
|
|
|
if (res < 0) {
|
|
|
|
|
port->vdm_state = VDM_STATE_ERR_SEND;
|
|
|
|
|
} else {
|
|
|
|
|
unsigned long timeout;
|
|
|
|
|
|
|
|
|
|
port->vdm_retries = 0;
|
|
|
|
|
port->vdm_state = VDM_STATE_BUSY;
|
|
|
|
|
timeout = vdm_ready_timeout(port->vdo_data[0]);
|
|
|
|
|
mod_delayed_work(port->wq, &port->vdm_state_machine,
|
|
|
|
|
timeout);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case VDM_STATE_WAIT_RSP_BUSY:
|
|
|
|
|
port->vdo_data[0] = port->vdo_retry;
|
|
|
|
|
port->vdo_count = 1;
|
|
|
|
|
port->vdm_state = VDM_STATE_READY;
|
|
|
|
|
break;
|
|
|
|
|
case VDM_STATE_BUSY:
|
|
|
|
|
port->vdm_state = VDM_STATE_ERR_TMOUT;
|
|
|
|
|
break;
|
|
|
|
|
case VDM_STATE_ERR_SEND:
|
|
|
|
|
/*
|
|
|
|
|
* A partner which does not support USB PD will not reply,
|
|
|
|
|
* so this is not a fatal error. At the same time, some
|
|
|
|
|
* devices may not return GoodCRC under some circumstances,
|
|
|
|
|
* so we need to retry.
|
|
|
|
|
*/
|
|
|
|
|
if (port->vdm_retries < 3) {
|
|
|
|
|
tcpm_log(port, "VDM Tx error, retry");
|
|
|
|
|
port->vdm_retries++;
|
|
|
|
|
port->vdm_state = VDM_STATE_READY;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void vdm_state_machine_work(struct work_struct *work)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = container_of(work, struct tcpm_port,
|
|
|
|
|
vdm_state_machine.work);
|
|
|
|
|
enum vdm_states prev_state;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Continue running as long as the port is not busy and there was
|
|
|
|
|
* a state change.
|
|
|
|
|
*/
|
|
|
|
|
do {
|
|
|
|
|
prev_state = port->vdm_state;
|
|
|
|
|
vdm_run_state_machine(port);
|
|
|
|
|
} while (port->vdm_state != prev_state &&
|
|
|
|
|
port->vdm_state != VDM_STATE_BUSY);
|
|
|
|
|
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* PD (data, control) command handling functions
|
|
|
|
|
*/
|
|
|
|
|
static void tcpm_pd_data_request(struct tcpm_port *port,
|
|
|
|
|
const struct pd_message *msg)
|
|
|
|
|
{
|
|
|
|
|
enum pd_data_msg_type type = pd_header_type_le(msg->header);
|
|
|
|
|
unsigned int cnt = pd_header_cnt_le(msg->header);
|
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
|
case PD_DATA_SOURCE_CAP:
|
|
|
|
|
if (port->pwr_role != TYPEC_SINK)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < cnt; i++)
|
|
|
|
|
port->source_caps[i] = le32_to_cpu(msg->payload[i]);
|
|
|
|
|
|
|
|
|
|
port->nr_source_caps = cnt;
|
|
|
|
|
|
|
|
|
|
tcpm_log_source_caps(port);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This message may be received even if VBUS is not
|
|
|
|
|
* present. This is quite unexpected; see USB PD
|
|
|
|
|
* specification, sections 8.3.3.6.3.1 and 8.3.3.6.3.2.
|
|
|
|
|
* However, at the same time, we must be ready to
|
|
|
|
|
* receive this message and respond to it 15ms after
|
|
|
|
|
* receiving PS_RDY during power swap operations, no matter
|
|
|
|
|
* if VBUS is available or not (USB PD specification,
|
|
|
|
|
* section 6.5.9.2).
|
|
|
|
|
* So we need to accept the message either way,
|
|
|
|
|
* but be prepared to keep waiting for VBUS after it was
|
|
|
|
|
* handled.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PD_DATA_REQUEST:
|
|
|
|
|
if (port->pwr_role != TYPEC_SOURCE ||
|
|
|
|
|
cnt != 1) {
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
port->sink_request = le32_to_cpu(msg->payload[0]);
|
|
|
|
|
tcpm_set_state(port, SRC_NEGOTIATE_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PD_DATA_SINK_CAP:
|
|
|
|
|
/* We don't do anything with this at the moment... */
|
|
|
|
|
for (i = 0; i < cnt; i++)
|
|
|
|
|
port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
|
|
|
|
|
port->nr_sink_caps = cnt;
|
|
|
|
|
break;
|
|
|
|
|
case PD_DATA_VENDOR_DEF:
|
|
|
|
|
tcpm_handle_vdm_request(port, msg->payload, cnt);
|
|
|
|
|
break;
|
|
|
|
|
case PD_DATA_BIST:
|
|
|
|
|
if (port->state == SRC_READY || port->state == SNK_READY) {
|
|
|
|
|
port->bist_request = le32_to_cpu(msg->payload[0]);
|
|
|
|
|
tcpm_set_state(port, BIST_RX, 0);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_log(port, "Unhandled data message type %#x", type);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_pd_ctrl_request(struct tcpm_port *port,
|
|
|
|
|
const struct pd_message *msg)
|
|
|
|
|
{
|
|
|
|
|
enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
|
|
|
|
|
enum tcpm_state next_state;
|
|
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
|
case PD_CTRL_GOOD_CRC:
|
|
|
|
|
case PD_CTRL_PING:
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_GET_SOURCE_CAP:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_DATA_SOURCE_CAP);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_GET_SINK_CAP:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_DATA_SINK_CAP);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_GOTO_MIN:
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_PS_RDY:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_TRANSITION_SINK:
|
|
|
|
|
if (port->vbus_present) {
|
|
|
|
|
tcpm_set_current_limit(port,
|
|
|
|
|
port->current_limit,
|
|
|
|
|
port->supply_voltage);
|
|
|
|
|
tcpm_set_state(port, SNK_READY, 0);
|
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* Seen after power swap. Keep waiting for VBUS
|
|
|
|
|
* in a transitional state.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
SNK_TRANSITION_SINK_VBUS, 0);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SRC_SNK_SOURCE_OFF:
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SRC_SNK_SINK_ON, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SNK_SRC_SINK_OFF:
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON, 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_WAIT_FOR_VCONN:
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_TURN_OFF_VCONN, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_REJECT:
|
|
|
|
|
case PD_CTRL_WAIT:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
/* USB PD specification, Figure 8-43 */
|
|
|
|
|
if (port->explicit_contract)
|
|
|
|
|
next_state = SNK_READY;
|
|
|
|
|
else
|
|
|
|
|
next_state = SNK_WAIT_CAPABILITIES;
|
|
|
|
|
tcpm_set_state(port, next_state, 0);
|
|
|
|
|
break;
|
|
|
|
|
case DR_SWAP_SEND:
|
|
|
|
|
port->swap_status = (type == PD_CTRL_WAIT ?
|
|
|
|
|
-EAGAIN : -EOPNOTSUPP);
|
|
|
|
|
tcpm_set_state(port, DR_SWAP_CANCEL, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SEND:
|
|
|
|
|
port->swap_status = (type == PD_CTRL_WAIT ?
|
|
|
|
|
-EAGAIN : -EOPNOTSUPP);
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_CANCEL, 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_SEND:
|
|
|
|
|
port->swap_status = (type == PD_CTRL_WAIT ?
|
|
|
|
|
-EAGAIN : -EOPNOTSUPP);
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_CANCEL, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_ACCEPT:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SOFT_RESET_SEND:
|
|
|
|
|
port->message_id = 0;
|
2017-05-09 10:04:56 -06:00
|
|
|
|
port->rx_msgid = -1;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
next_state = SRC_SEND_CAPABILITIES;
|
|
|
|
|
else
|
|
|
|
|
next_state = SNK_WAIT_CAPABILITIES;
|
|
|
|
|
tcpm_set_state(port, next_state, 0);
|
|
|
|
|
break;
|
|
|
|
|
case DR_SWAP_SEND:
|
|
|
|
|
tcpm_set_state(port, DR_SWAP_CHANGE_DR, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SEND:
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_START, 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_SEND:
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_START, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_SOFT_RESET:
|
|
|
|
|
tcpm_set_state(port, SOFT_RESET, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_DR_SWAP:
|
|
|
|
|
if (port->typec_caps.type != TYPEC_PORT_DRP) {
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
* XXX
|
|
|
|
|
* 6.3.9: If an alternate mode is active, a request to swap
|
|
|
|
|
* alternate modes shall trigger a port reset.
|
|
|
|
|
*/
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
tcpm_set_state(port, DR_SWAP_ACCEPT, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_PR_SWAP:
|
|
|
|
|
if (port->typec_caps.type != TYPEC_PORT_DRP) {
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_ACCEPT, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case PD_CTRL_VCONN_SWAP:
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_ACCEPT, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
tcpm_log(port, "Unhandled ctrl message type %#x", type);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_pd_rx_handler(struct work_struct *work)
|
|
|
|
|
{
|
|
|
|
|
struct pd_rx_event *event = container_of(work,
|
|
|
|
|
struct pd_rx_event, work);
|
|
|
|
|
const struct pd_message *msg = &event->msg;
|
|
|
|
|
unsigned int cnt = pd_header_cnt_le(msg->header);
|
|
|
|
|
struct tcpm_port *port = event->port;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "PD RX, header: %#x [%d]", le16_to_cpu(msg->header),
|
|
|
|
|
port->attached);
|
|
|
|
|
|
|
|
|
|
if (port->attached) {
|
2017-05-09 10:04:56 -06:00
|
|
|
|
enum pd_ctrl_msg_type type = pd_header_type_le(msg->header);
|
|
|
|
|
unsigned int msgid = pd_header_msgid_le(msg->header);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* USB PD standard, 6.6.1.2:
|
|
|
|
|
* "... if MessageID value in a received Message is the
|
|
|
|
|
* same as the stored value, the receiver shall return a
|
|
|
|
|
* GoodCRC Message with that MessageID value and drop
|
|
|
|
|
* the Message (this is a retry of an already received
|
|
|
|
|
* Message). Note: this shall not apply to the Soft_Reset
|
|
|
|
|
* Message which always has a MessageID value of zero."
|
|
|
|
|
*/
|
|
|
|
|
if (msgid == port->rx_msgid && type != PD_CTRL_SOFT_RESET)
|
|
|
|
|
goto done;
|
|
|
|
|
port->rx_msgid = msgid;
|
|
|
|
|
|
2017-04-27 15:09:56 -06:00
|
|
|
|
/*
|
|
|
|
|
* If both ends believe to be DFP/host, we have a data role
|
|
|
|
|
* mismatch.
|
|
|
|
|
*/
|
|
|
|
|
if (!!(le16_to_cpu(msg->header) & PD_HEADER_DATA_ROLE) ==
|
|
|
|
|
(port->data_role == TYPEC_HOST)) {
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"Data role mismatch, initiating error recovery");
|
|
|
|
|
tcpm_set_state(port, ERROR_RECOVERY, 0);
|
|
|
|
|
} else {
|
|
|
|
|
if (cnt)
|
|
|
|
|
tcpm_pd_data_request(port, msg);
|
|
|
|
|
else
|
|
|
|
|
tcpm_pd_ctrl_request(port, msg);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 10:04:56 -06:00
|
|
|
|
done:
|
2017-04-27 15:09:56 -06:00
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
kfree(event);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void tcpm_pd_receive(struct tcpm_port *port, const struct pd_message *msg)
|
|
|
|
|
{
|
|
|
|
|
struct pd_rx_event *event;
|
|
|
|
|
|
|
|
|
|
event = kzalloc(sizeof(*event), GFP_ATOMIC);
|
|
|
|
|
if (!event)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
INIT_WORK(&event->work, tcpm_pd_rx_handler);
|
|
|
|
|
event->port = port;
|
|
|
|
|
memcpy(&event->msg, msg, sizeof(*msg));
|
|
|
|
|
queue_work(port->wq, &event->work);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_pd_receive);
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_send_control(struct tcpm_port *port,
|
|
|
|
|
enum pd_ctrl_msg_type type)
|
|
|
|
|
{
|
|
|
|
|
struct pd_message msg;
|
|
|
|
|
|
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
|
msg.header = PD_HEADER_LE(type, port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id, 0);
|
|
|
|
|
|
|
|
|
|
return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Send queued message without affecting state.
|
|
|
|
|
* Return true if state machine should go back to sleep,
|
|
|
|
|
* false otherwise.
|
|
|
|
|
*/
|
|
|
|
|
static bool tcpm_send_queued_message(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum pd_msg_request queued_message;
|
|
|
|
|
|
|
|
|
|
do {
|
|
|
|
|
queued_message = port->queued_message;
|
|
|
|
|
port->queued_message = PD_MSG_NONE;
|
|
|
|
|
|
|
|
|
|
switch (queued_message) {
|
|
|
|
|
case PD_MSG_CTRL_WAIT:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_WAIT);
|
|
|
|
|
break;
|
|
|
|
|
case PD_MSG_CTRL_REJECT:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_REJECT);
|
|
|
|
|
break;
|
|
|
|
|
case PD_MSG_DATA_SINK_CAP:
|
|
|
|
|
tcpm_pd_send_sink_caps(port);
|
|
|
|
|
break;
|
|
|
|
|
case PD_MSG_DATA_SOURCE_CAP:
|
|
|
|
|
tcpm_pd_send_source_caps(port);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
} while (port->queued_message != PD_MSG_NONE);
|
|
|
|
|
|
|
|
|
|
if (port->delayed_state != INVALID_STATE) {
|
|
|
|
|
if (time_is_after_jiffies(port->delayed_runtime)) {
|
|
|
|
|
mod_delayed_work(port->wq, &port->state_machine,
|
|
|
|
|
port->delayed_runtime - jiffies);
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
port->delayed_state = INVALID_STATE;
|
|
|
|
|
}
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_check_request(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
u32 pdo, rdo = port->sink_request;
|
|
|
|
|
unsigned int max, op, pdo_max, index;
|
|
|
|
|
enum pd_pdo_type type;
|
|
|
|
|
|
|
|
|
|
index = rdo_index(rdo);
|
|
|
|
|
if (!index || index > port->nr_src_pdo)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
pdo = port->src_pdo[index - 1];
|
|
|
|
|
type = pdo_type(pdo);
|
|
|
|
|
switch (type) {
|
|
|
|
|
case PDO_TYPE_FIXED:
|
|
|
|
|
case PDO_TYPE_VAR:
|
|
|
|
|
max = rdo_max_current(rdo);
|
|
|
|
|
op = rdo_op_current(rdo);
|
|
|
|
|
pdo_max = pdo_max_current(pdo);
|
|
|
|
|
|
|
|
|
|
if (op > pdo_max)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
if (type == PDO_TYPE_FIXED)
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"Requested %u mV, %u mA for %u / %u mA",
|
|
|
|
|
pdo_fixed_voltage(pdo), pdo_max, op, max);
|
|
|
|
|
else
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"Requested %u -> %u mV, %u mA for %u / %u mA",
|
|
|
|
|
pdo_min_voltage(pdo), pdo_max_voltage(pdo),
|
|
|
|
|
pdo_max, op, max);
|
|
|
|
|
break;
|
|
|
|
|
case PDO_TYPE_BATT:
|
|
|
|
|
max = rdo_max_power(rdo);
|
|
|
|
|
op = rdo_op_power(rdo);
|
|
|
|
|
pdo_max = pdo_max_power(pdo);
|
|
|
|
|
|
|
|
|
|
if (op > pdo_max)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
if (max > pdo_max && !(rdo & RDO_CAP_MISMATCH))
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"Requested %u -> %u mV, %u mW for %u / %u mW",
|
|
|
|
|
pdo_min_voltage(pdo), pdo_max_voltage(pdo),
|
|
|
|
|
pdo_max, op, max);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
port->op_vsafe5v = index == 1;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_select_pdo(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
unsigned int i, max_mw = 0, max_mv = 0;
|
|
|
|
|
int ret = -EINVAL;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Select the source PDO providing the most power while staying within
|
|
|
|
|
* the board's voltage limits. Prefer PDO providing exp
|
|
|
|
|
*/
|
|
|
|
|
for (i = 0; i < port->nr_source_caps; i++) {
|
|
|
|
|
u32 pdo = port->source_caps[i];
|
|
|
|
|
enum pd_pdo_type type = pdo_type(pdo);
|
|
|
|
|
unsigned int mv, ma, mw;
|
|
|
|
|
|
|
|
|
|
if (type == PDO_TYPE_FIXED)
|
|
|
|
|
mv = pdo_fixed_voltage(pdo);
|
|
|
|
|
else
|
|
|
|
|
mv = pdo_min_voltage(pdo);
|
|
|
|
|
|
|
|
|
|
if (type == PDO_TYPE_BATT) {
|
|
|
|
|
mw = pdo_max_power(pdo);
|
|
|
|
|
} else {
|
|
|
|
|
ma = min(pdo_max_current(pdo),
|
|
|
|
|
port->max_snk_ma);
|
|
|
|
|
mw = ma * mv / 1000;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Perfer higher voltages if available */
|
|
|
|
|
if ((mw > max_mw || (mw == max_mw && mv > max_mv)) &&
|
|
|
|
|
mv <= port->max_snk_mv) {
|
|
|
|
|
ret = i;
|
|
|
|
|
max_mw = mw;
|
|
|
|
|
max_mv = mv;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_build_request(struct tcpm_port *port, u32 *rdo)
|
|
|
|
|
{
|
|
|
|
|
unsigned int mv, ma, mw, flags;
|
|
|
|
|
unsigned int max_ma, max_mw;
|
|
|
|
|
enum pd_pdo_type type;
|
|
|
|
|
int index;
|
|
|
|
|
u32 pdo;
|
|
|
|
|
|
|
|
|
|
index = tcpm_pd_select_pdo(port);
|
|
|
|
|
if (index < 0)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
pdo = port->source_caps[index];
|
|
|
|
|
type = pdo_type(pdo);
|
|
|
|
|
|
|
|
|
|
if (type == PDO_TYPE_FIXED)
|
|
|
|
|
mv = pdo_fixed_voltage(pdo);
|
|
|
|
|
else
|
|
|
|
|
mv = pdo_min_voltage(pdo);
|
|
|
|
|
|
|
|
|
|
/* Select maximum available current within the board's power limit */
|
|
|
|
|
if (type == PDO_TYPE_BATT) {
|
|
|
|
|
mw = pdo_max_power(pdo);
|
|
|
|
|
ma = 1000 * min(mw, port->max_snk_mw) / mv;
|
|
|
|
|
} else {
|
|
|
|
|
ma = min(pdo_max_current(pdo),
|
|
|
|
|
1000 * port->max_snk_mw / mv);
|
|
|
|
|
}
|
|
|
|
|
ma = min(ma, port->max_snk_ma);
|
|
|
|
|
|
2017-05-09 10:04:57 -06:00
|
|
|
|
flags = RDO_USB_COMM | RDO_NO_SUSPEND;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
|
|
|
|
|
/* Set mismatch bit if offered power is less than operating power */
|
|
|
|
|
mw = ma * mv / 1000;
|
|
|
|
|
max_ma = ma;
|
|
|
|
|
max_mw = mw;
|
|
|
|
|
if (mw < port->operating_snk_mw) {
|
|
|
|
|
flags |= RDO_CAP_MISMATCH;
|
|
|
|
|
max_mw = port->operating_snk_mw;
|
|
|
|
|
max_ma = max_mw * 1000 / mv;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "cc=%d cc1=%d cc2=%d vbus=%d vconn=%s polarity=%d",
|
|
|
|
|
port->cc_req, port->cc1, port->cc2, port->vbus_source,
|
|
|
|
|
port->vconn_role == TYPEC_SOURCE ? "source" : "sink",
|
|
|
|
|
port->polarity);
|
|
|
|
|
|
|
|
|
|
if (type == PDO_TYPE_BATT) {
|
|
|
|
|
*rdo = RDO_BATT(index + 1, mw, max_mw, flags);
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
|
|
|
|
|
index, mv, mw,
|
|
|
|
|
flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
|
|
|
|
|
} else {
|
|
|
|
|
*rdo = RDO_FIXED(index + 1, ma, max_ma, flags);
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
|
|
|
|
|
index, mv, ma,
|
|
|
|
|
flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
port->current_limit = ma;
|
|
|
|
|
port->supply_voltage = mv;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pd_send_request(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
struct pd_message msg;
|
|
|
|
|
int ret;
|
|
|
|
|
u32 rdo;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_pd_build_request(port, &rdo);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
|
msg.header = PD_HEADER_LE(PD_DATA_REQUEST,
|
|
|
|
|
port->pwr_role,
|
|
|
|
|
port->data_role,
|
|
|
|
|
port->message_id, 1);
|
|
|
|
|
msg.payload[0] = cpu_to_le32(rdo);
|
|
|
|
|
|
|
|
|
|
return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_vbus(struct tcpm_port *port, bool enable)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (enable && port->vbus_charge)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "vbus:=%d charge=%d", enable, port->vbus_charge);
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_vbus(port->tcpc, enable, port->vbus_charge);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->vbus_source = enable;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_set_charge(struct tcpm_port *port, bool charge)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (charge && port->vbus_source)
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
|
|
if (charge != port->vbus_charge) {
|
|
|
|
|
tcpm_log(port, "vbus=%d charge:=%d", port->vbus_source, charge);
|
|
|
|
|
ret = port->tcpc->set_vbus(port->tcpc, port->vbus_source,
|
|
|
|
|
charge);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
port->vbus_charge = charge;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static bool tcpm_start_drp_toggling(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (port->tcpc->start_drp_toggling &&
|
|
|
|
|
port->typec_caps.type == TYPEC_PORT_DRP) {
|
|
|
|
|
tcpm_log_force(port, "Start DRP toggling");
|
|
|
|
|
ret = port->tcpc->start_drp_toggling(port->tcpc,
|
|
|
|
|
tcpm_rp_cc(port));
|
|
|
|
|
if (!ret)
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_set_cc(struct tcpm_port *port, enum typec_cc_status cc)
|
|
|
|
|
{
|
|
|
|
|
tcpm_log(port, "cc:=%d", cc);
|
|
|
|
|
port->cc_req = cc;
|
|
|
|
|
port->tcpc->set_cc(port->tcpc, cc);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_init_vbus(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_vbus(port->tcpc, false, false);
|
|
|
|
|
port->vbus_source = false;
|
|
|
|
|
port->vbus_charge = false;
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_init_vconn(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_vconn(port->tcpc, false);
|
|
|
|
|
port->vconn_role = TYPEC_SINK;
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_typec_connect(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (!port->connected) {
|
|
|
|
|
/* Make sure we don't report stale identity information */
|
|
|
|
|
memset(&port->partner_ident, 0, sizeof(port->partner_ident));
|
|
|
|
|
port->partner_desc.usb_pd = port->pd_capable;
|
|
|
|
|
if (tcpm_port_is_debug(port))
|
|
|
|
|
port->partner_desc.accessory = TYPEC_ACCESSORY_DEBUG;
|
|
|
|
|
else if (tcpm_port_is_audio(port))
|
|
|
|
|
port->partner_desc.accessory = TYPEC_ACCESSORY_AUDIO;
|
|
|
|
|
else
|
|
|
|
|
port->partner_desc.accessory = TYPEC_ACCESSORY_NONE;
|
|
|
|
|
port->partner = typec_register_partner(port->typec_port,
|
|
|
|
|
&port->partner_desc);
|
|
|
|
|
port->connected = true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_src_attach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum typec_cc_polarity polarity =
|
|
|
|
|
port->cc2 == TYPEC_CC_RD ? TYPEC_POLARITY_CC2
|
|
|
|
|
: TYPEC_POLARITY_CC1;
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (port->attached)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_polarity(port, polarity);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
ret = port->tcpc->set_pd_rx(port->tcpc, true);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
goto out_disable_mux;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* USB Type-C specification, version 1.2,
|
|
|
|
|
* chapter 4.5.2.2.8.1 (Attached.SRC Requirements)
|
|
|
|
|
* Enable VCONN only if the non-RD port is set to RA.
|
|
|
|
|
*/
|
|
|
|
|
if ((polarity == TYPEC_POLARITY_CC1 && port->cc2 == TYPEC_CC_RA) ||
|
|
|
|
|
(polarity == TYPEC_POLARITY_CC2 && port->cc1 == TYPEC_CC_RA)) {
|
|
|
|
|
ret = tcpm_set_vconn(port, true);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
goto out_disable_pd;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_vbus(port, true);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
goto out_disable_vconn;
|
|
|
|
|
|
|
|
|
|
port->pd_capable = false;
|
|
|
|
|
|
|
|
|
|
port->partner = NULL;
|
|
|
|
|
|
|
|
|
|
port->attached = true;
|
|
|
|
|
port->send_discover = true;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
out_disable_vconn:
|
|
|
|
|
tcpm_set_vconn(port, false);
|
|
|
|
|
out_disable_pd:
|
|
|
|
|
port->tcpc->set_pd_rx(port->tcpc, false);
|
|
|
|
|
out_disable_mux:
|
|
|
|
|
tcpm_mux_set(port, TYPEC_MUX_NONE, TCPC_USB_SWITCH_DISCONNECT);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_typec_disconnect(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->connected) {
|
|
|
|
|
typec_unregister_partner(port->partner);
|
|
|
|
|
port->partner = NULL;
|
|
|
|
|
port->connected = false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_unregister_altmodes(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
struct pd_mode_data *modep = &port->mode_data;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < modep->altmodes; i++) {
|
|
|
|
|
typec_unregister_altmode(port->partner_altmode[i]);
|
|
|
|
|
port->partner_altmode[i] = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
memset(modep, 0, sizeof(*modep));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_reset_port(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
tcpm_unregister_altmodes(port);
|
|
|
|
|
tcpm_typec_disconnect(port);
|
|
|
|
|
port->attached = false;
|
|
|
|
|
port->pd_capable = false;
|
|
|
|
|
|
2017-05-09 10:04:56 -06:00
|
|
|
|
/*
|
|
|
|
|
* First Rx ID should be 0; set this to a sentinel of -1 so that
|
|
|
|
|
* we can check tcpm_pd_rx_handler() if we had seen it before.
|
|
|
|
|
*/
|
|
|
|
|
port->rx_msgid = -1;
|
|
|
|
|
|
2017-04-27 15:09:56 -06:00
|
|
|
|
port->tcpc->set_pd_rx(port->tcpc, false);
|
|
|
|
|
tcpm_init_vbus(port); /* also disables charging */
|
|
|
|
|
tcpm_init_vconn(port);
|
|
|
|
|
tcpm_set_current_limit(port, 0, 0);
|
|
|
|
|
tcpm_set_polarity(port, TYPEC_POLARITY_CC1);
|
|
|
|
|
tcpm_set_attached_state(port, false);
|
|
|
|
|
port->try_src_count = 0;
|
|
|
|
|
port->try_snk_count = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_detach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (!port->attached)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
port->hard_reset_count = 0;
|
|
|
|
|
|
|
|
|
|
tcpm_reset_port(port);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_src_detach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
tcpm_detach(port);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_snk_attach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (port->attached)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_polarity(port, port->cc2 != TYPEC_CC_OPEN ?
|
|
|
|
|
TYPEC_POLARITY_CC2 : TYPEC_POLARITY_CC1);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_roles(port, true, TYPEC_SINK, TYPEC_DEVICE);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->pd_capable = false;
|
|
|
|
|
|
|
|
|
|
port->partner = NULL;
|
|
|
|
|
|
|
|
|
|
port->attached = true;
|
|
|
|
|
port->send_discover = true;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_snk_detach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
tcpm_detach(port);
|
|
|
|
|
|
|
|
|
|
/* XXX: (Dis)connect SuperSpeed mux? */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_acc_attach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
if (port->attached)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
ret = tcpm_set_roles(port, true, TYPEC_SOURCE, TYPEC_HOST);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
|
|
port->partner = NULL;
|
|
|
|
|
|
|
|
|
|
tcpm_typec_connect(port);
|
|
|
|
|
|
|
|
|
|
port->attached = true;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_acc_detach(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
tcpm_detach(port);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline enum tcpm_state hard_reset_state(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)
|
|
|
|
|
return HARD_RESET_SEND;
|
|
|
|
|
if (port->pd_capable)
|
|
|
|
|
return ERROR_RECOVERY;
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
return SRC_UNATTACHED;
|
|
|
|
|
if (port->state == SNK_WAIT_CAPABILITIES)
|
|
|
|
|
return SNK_READY;
|
|
|
|
|
return SNK_UNATTACHED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline enum tcpm_state ready_state(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
return SRC_READY;
|
|
|
|
|
else
|
|
|
|
|
return SNK_READY;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static inline enum tcpm_state unattached_state(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
return SRC_UNATTACHED;
|
|
|
|
|
else
|
|
|
|
|
return SNK_UNATTACHED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_check_send_discover(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
if (port->data_role == TYPEC_HOST && port->send_discover &&
|
|
|
|
|
port->pd_capable) {
|
|
|
|
|
tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
|
|
|
|
|
port->send_discover = false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_swap_complete(struct tcpm_port *port, int result)
|
|
|
|
|
{
|
|
|
|
|
if (port->swap_pending) {
|
|
|
|
|
port->swap_status = result;
|
|
|
|
|
port->swap_pending = false;
|
|
|
|
|
complete(&port->swap_complete);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void run_state_machine(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
port->enter_state = port->state;
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case DRP_TOGGLING:
|
|
|
|
|
break;
|
|
|
|
|
/* SRC states */
|
|
|
|
|
case SRC_UNATTACHED:
|
|
|
|
|
tcpm_swap_complete(port, -ENOTCONN);
|
|
|
|
|
tcpm_src_detach(port);
|
|
|
|
|
if (tcpm_start_drp_toggling(port)) {
|
|
|
|
|
tcpm_set_state(port, DRP_TOGGLING, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
if (port->typec_caps.type == TYPEC_PORT_DRP)
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, PD_T_DRP_SNK);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_ATTACH_WAIT:
|
|
|
|
|
if (tcpm_port_is_debug(port))
|
|
|
|
|
tcpm_set_state(port, DEBUG_ACC_ATTACHED,
|
|
|
|
|
PD_T_CC_DEBOUNCE);
|
|
|
|
|
else if (tcpm_port_is_audio(port))
|
|
|
|
|
tcpm_set_state(port, AUDIO_ACC_ATTACHED,
|
|
|
|
|
PD_T_CC_DEBOUNCE);
|
|
|
|
|
else if (tcpm_port_is_source(port))
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
tcpm_try_snk(port) ? SNK_TRY
|
|
|
|
|
: SRC_ATTACHED,
|
|
|
|
|
PD_T_CC_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_TRY:
|
|
|
|
|
port->try_snk_count++;
|
|
|
|
|
/*
|
|
|
|
|
* Requirements:
|
|
|
|
|
* - Do not drive vconn or vbus
|
|
|
|
|
* - Terminate CC pins (both) to Rd
|
|
|
|
|
* Action:
|
|
|
|
|
* - Wait for tDRPTry (PD_T_DRP_TRY).
|
|
|
|
|
* Until then, ignore any state changes.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_cc(port, TYPEC_CC_RD);
|
|
|
|
|
tcpm_set_state(port, SNK_TRY_WAIT, PD_T_DRP_TRY);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRY_WAIT:
|
|
|
|
|
if (port->vbus_present && tcpm_port_is_sink(port)) {
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (!tcpm_port_is_sink(port)) {
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT,
|
|
|
|
|
PD_T_PD_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/* No vbus, cc state is sink or open */
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED, PD_T_DRP_TRYWAIT);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRYWAIT:
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
if (!port->vbus_present && tcpm_port_is_source(port))
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
|
|
|
|
|
PD_T_DRP_TRY);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRYWAIT_UNATTACHED:
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SRC_ATTACHED:
|
|
|
|
|
ret = tcpm_src_attach(port);
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED,
|
|
|
|
|
ret < 0 ? 0 : PD_T_PS_SOURCE_ON);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_STARTUP:
|
|
|
|
|
typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_USB);
|
|
|
|
|
port->pwr_opmode = TYPEC_PWR_MODE_USB;
|
|
|
|
|
port->caps_count = 0;
|
|
|
|
|
port->message_id = 0;
|
2017-05-09 10:04:56 -06:00
|
|
|
|
port->rx_msgid = -1;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
port->explicit_contract = false;
|
|
|
|
|
tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_SEND_CAPABILITIES:
|
|
|
|
|
port->caps_count++;
|
|
|
|
|
if (port->caps_count > PD_N_CAPS_COUNT) {
|
|
|
|
|
tcpm_set_state(port, SRC_READY, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
ret = tcpm_pd_send_source_caps(port);
|
|
|
|
|
if (ret < 0) {
|
|
|
|
|
tcpm_set_state(port, SRC_SEND_CAPABILITIES,
|
|
|
|
|
PD_T_SEND_SOURCE_CAP);
|
|
|
|
|
} else {
|
|
|
|
|
/*
|
|
|
|
|
* Per standard, we should clear the reset counter here.
|
|
|
|
|
* However, that can result in state machine hang-ups.
|
|
|
|
|
* Reset it only in READY state to improve stability.
|
|
|
|
|
*/
|
|
|
|
|
/* port->hard_reset_count = 0; */
|
|
|
|
|
port->caps_count = 0;
|
|
|
|
|
port->pd_capable = true;
|
|
|
|
|
tcpm_set_state_cond(port, hard_reset_state(port),
|
|
|
|
|
PD_T_SEND_SOURCE_CAP);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case SRC_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
ret = tcpm_pd_check_request(port);
|
|
|
|
|
if (ret < 0) {
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_REJECT);
|
|
|
|
|
if (!port->explicit_contract) {
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
SRC_WAIT_NEW_CAPABILITIES, 0);
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_set_state(port, SRC_READY, 0);
|
|
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
|
|
|
|
|
tcpm_set_state(port, SRC_TRANSITION_SUPPLY,
|
|
|
|
|
PD_T_SRC_TRANSITION);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRANSITION_SUPPLY:
|
|
|
|
|
/* XXX: regulator_set_voltage(vbus, ...) */
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
|
|
|
|
|
port->explicit_contract = true;
|
|
|
|
|
typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
|
|
|
|
|
port->pwr_opmode = TYPEC_PWR_MODE_PD;
|
|
|
|
|
tcpm_set_state_cond(port, SRC_READY, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
#if 1
|
|
|
|
|
port->hard_reset_count = 0;
|
|
|
|
|
#endif
|
|
|
|
|
port->try_src_count = 0;
|
|
|
|
|
|
|
|
|
|
tcpm_typec_connect(port);
|
|
|
|
|
|
|
|
|
|
tcpm_check_send_discover(port);
|
|
|
|
|
/*
|
|
|
|
|
* 6.3.5
|
|
|
|
|
* Sending ping messages is not necessary if
|
|
|
|
|
* - the source operates at vSafe5V
|
|
|
|
|
* or
|
|
|
|
|
* - The system is not operating in PD mode
|
|
|
|
|
* or
|
|
|
|
|
* - Both partners are connected using a Type-C connector
|
|
|
|
|
* XXX How do we know that ?
|
|
|
|
|
*/
|
|
|
|
|
if (port->pwr_opmode == TYPEC_PWR_MODE_PD &&
|
|
|
|
|
!port->op_vsafe5v) {
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_PING);
|
|
|
|
|
tcpm_set_state_cond(port, SRC_READY,
|
|
|
|
|
PD_T_SOURCE_ACTIVITY);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case SRC_WAIT_NEW_CAPABILITIES:
|
|
|
|
|
/* Nothing to do... */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* SNK states */
|
|
|
|
|
case SNK_UNATTACHED:
|
|
|
|
|
tcpm_swap_complete(port, -ENOTCONN);
|
|
|
|
|
tcpm_snk_detach(port);
|
|
|
|
|
if (tcpm_start_drp_toggling(port)) {
|
|
|
|
|
tcpm_set_state(port, DRP_TOGGLING, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
tcpm_set_cc(port, TYPEC_CC_RD);
|
|
|
|
|
if (port->typec_caps.type == TYPEC_PORT_DRP)
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED, PD_T_DRP_SRC);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_ATTACH_WAIT:
|
|
|
|
|
if ((port->cc1 == TYPEC_CC_OPEN &&
|
|
|
|
|
port->cc2 != TYPEC_CC_OPEN) ||
|
|
|
|
|
(port->cc1 != TYPEC_CC_OPEN &&
|
|
|
|
|
port->cc2 == TYPEC_CC_OPEN))
|
|
|
|
|
tcpm_set_state(port, SNK_DEBOUNCED,
|
|
|
|
|
PD_T_CC_DEBOUNCE);
|
|
|
|
|
else if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED,
|
|
|
|
|
PD_T_PD_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DEBOUNCED:
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED,
|
|
|
|
|
PD_T_PD_DEBOUNCE);
|
|
|
|
|
else if (port->vbus_present)
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
tcpm_try_src(port) ? SRC_TRY
|
|
|
|
|
: SNK_ATTACHED,
|
|
|
|
|
0);
|
|
|
|
|
else
|
|
|
|
|
/* Wait for VBUS, but not forever */
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SRC_TRY:
|
|
|
|
|
port->try_src_count++;
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
tcpm_set_state(port, SNK_TRYWAIT, PD_T_DRP_TRY);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRY_DEBOUNCE:
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACHED, PD_T_PD_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT:
|
|
|
|
|
tcpm_set_cc(port, TYPEC_CC_RD);
|
|
|
|
|
tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, PD_T_CC_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT_DEBOUNCE:
|
|
|
|
|
if (port->vbus_present) {
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (tcpm_port_is_disconnected(port)) {
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED,
|
|
|
|
|
PD_T_PD_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (tcpm_port_is_source(port))
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACHED, 0);
|
|
|
|
|
/* XXX Are we supposed to stay in this state ? */
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT_VBUS:
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, PD_T_CC_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_ATTACHED:
|
|
|
|
|
ret = tcpm_snk_attach(port);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, 0);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, SNK_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_STARTUP:
|
|
|
|
|
/* XXX: callback into infrastructure */
|
|
|
|
|
typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_USB);
|
|
|
|
|
port->pwr_opmode = TYPEC_PWR_MODE_USB;
|
|
|
|
|
port->message_id = 0;
|
2017-05-09 10:04:56 -06:00
|
|
|
|
port->rx_msgid = -1;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
port->explicit_contract = false;
|
|
|
|
|
tcpm_set_state(port, SNK_DISCOVERY, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DISCOVERY:
|
|
|
|
|
if (port->vbus_present) {
|
|
|
|
|
tcpm_set_current_limit(port,
|
|
|
|
|
tcpm_get_current_limit(port),
|
|
|
|
|
5000);
|
|
|
|
|
tcpm_set_charge(port, true);
|
|
|
|
|
tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
* For DRP, timeouts differ. Also, handling is supposed to be
|
|
|
|
|
* different and much more complex (dead battery detection;
|
|
|
|
|
* see USB power delivery specification, section 8.3.3.6.1.5.1).
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port, hard_reset_state(port),
|
|
|
|
|
port->typec_caps.type == TYPEC_PORT_DRP ?
|
|
|
|
|
PD_T_DB_DETECT : PD_T_NO_RESPONSE);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DISCOVERY_DEBOUNCE:
|
|
|
|
|
tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE_DONE,
|
|
|
|
|
PD_T_CC_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DISCOVERY_DEBOUNCE_DONE:
|
|
|
|
|
if (!tcpm_port_is_disconnected(port) &&
|
|
|
|
|
tcpm_port_is_sink(port) &&
|
|
|
|
|
time_is_after_jiffies(port->delayed_runtime)) {
|
|
|
|
|
tcpm_set_state(port, SNK_DISCOVERY,
|
|
|
|
|
port->delayed_runtime - jiffies);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
tcpm_set_state(port, unattached_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_WAIT_CAPABILITIES:
|
|
|
|
|
ret = port->tcpc->set_pd_rx(port->tcpc, true);
|
|
|
|
|
if (ret < 0) {
|
|
|
|
|
tcpm_set_state(port, SNK_READY, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/*
|
|
|
|
|
* If VBUS has never been low, and we time out waiting
|
|
|
|
|
* for source cap, try a soft reset first, in case we
|
|
|
|
|
* were already in a stable contract before this boot.
|
|
|
|
|
* Do this only once.
|
|
|
|
|
*/
|
|
|
|
|
if (port->vbus_never_low) {
|
|
|
|
|
port->vbus_never_low = false;
|
|
|
|
|
tcpm_set_state(port, SOFT_RESET_SEND,
|
|
|
|
|
PD_T_SINK_WAIT_CAP);
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_set_state(port, hard_reset_state(port),
|
|
|
|
|
PD_T_SINK_WAIT_CAP);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case SNK_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
port->pd_capable = true;
|
|
|
|
|
port->hard_reset_count = 0;
|
|
|
|
|
ret = tcpm_pd_send_request(port);
|
|
|
|
|
if (ret < 0) {
|
|
|
|
|
/* Let the Source send capabilities again. */
|
|
|
|
|
tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_set_state_cond(port, hard_reset_state(port),
|
|
|
|
|
PD_T_SENDER_RESPONSE);
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRANSITION_SINK:
|
|
|
|
|
case SNK_TRANSITION_SINK_VBUS:
|
|
|
|
|
tcpm_set_state(port, hard_reset_state(port),
|
|
|
|
|
PD_T_PS_TRANSITION);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
port->try_snk_count = 0;
|
|
|
|
|
port->explicit_contract = true;
|
|
|
|
|
typec_set_pwr_opmode(port->typec_port, TYPEC_PWR_MODE_PD);
|
|
|
|
|
port->pwr_opmode = TYPEC_PWR_MODE_PD;
|
|
|
|
|
|
|
|
|
|
tcpm_typec_connect(port);
|
|
|
|
|
|
|
|
|
|
tcpm_check_send_discover(port);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Accessory states */
|
|
|
|
|
case ACC_UNATTACHED:
|
|
|
|
|
tcpm_acc_detach(port);
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
case DEBUG_ACC_ATTACHED:
|
|
|
|
|
case AUDIO_ACC_ATTACHED:
|
|
|
|
|
ret = tcpm_acc_attach(port);
|
|
|
|
|
if (ret < 0)
|
|
|
|
|
tcpm_set_state(port, ACC_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
case AUDIO_ACC_DEBOUNCE:
|
|
|
|
|
tcpm_set_state(port, ACC_UNATTACHED, PD_T_CC_DEBOUNCE);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Hard_Reset states */
|
|
|
|
|
case HARD_RESET_SEND:
|
|
|
|
|
tcpm_pd_transmit(port, TCPC_TX_HARD_RESET, NULL);
|
|
|
|
|
tcpm_set_state(port, HARD_RESET_START, 0);
|
|
|
|
|
break;
|
|
|
|
|
case HARD_RESET_START:
|
|
|
|
|
port->hard_reset_count++;
|
|
|
|
|
port->tcpc->set_pd_rx(port->tcpc, false);
|
|
|
|
|
tcpm_unregister_altmodes(port);
|
|
|
|
|
port->send_discover = true;
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
tcpm_set_state(port, SRC_HARD_RESET_VBUS_OFF,
|
|
|
|
|
PD_T_PS_HARD_RESET);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_HARD_RESET_VBUS_OFF:
|
|
|
|
|
tcpm_set_vconn(port, true);
|
|
|
|
|
tcpm_set_vbus(port, false);
|
|
|
|
|
tcpm_set_roles(port, false, TYPEC_SOURCE, TYPEC_HOST);
|
|
|
|
|
tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_HARD_RESET_VBUS_ON:
|
|
|
|
|
tcpm_set_vbus(port, true);
|
|
|
|
|
port->tcpc->set_pd_rx(port->tcpc, true);
|
|
|
|
|
tcpm_set_attached_state(port, true);
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED, PD_T_PS_SOURCE_ON);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_HARD_RESET_SINK_OFF:
|
|
|
|
|
tcpm_set_vconn(port, false);
|
|
|
|
|
tcpm_set_charge(port, false);
|
|
|
|
|
tcpm_set_roles(port, false, TYPEC_SINK, TYPEC_DEVICE);
|
|
|
|
|
/*
|
|
|
|
|
* VBUS may or may not toggle, depending on the adapter.
|
|
|
|
|
* If it doesn't toggle, transition to SNK_HARD_RESET_SINK_ON
|
|
|
|
|
* directly after timeout.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, PD_T_SAFE_0V);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_HARD_RESET_WAIT_VBUS:
|
|
|
|
|
/* Assume we're disconnected if VBUS doesn't come back. */
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED,
|
|
|
|
|
PD_T_SRC_RECOVER_MAX + PD_T_SRC_TURN_ON);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_HARD_RESET_SINK_ON:
|
|
|
|
|
/* Note: There is no guarantee that VBUS is on in this state */
|
|
|
|
|
/*
|
|
|
|
|
* XXX:
|
|
|
|
|
* The specification suggests that dual mode ports in sink
|
|
|
|
|
* mode should transition to state PE_SRC_Transition_to_default.
|
|
|
|
|
* See USB power delivery specification chapter 8.3.3.6.1.3.
|
|
|
|
|
* This would mean to to
|
|
|
|
|
* - turn off VCONN, reset power supply
|
|
|
|
|
* - request hardware reset
|
|
|
|
|
* - turn on VCONN
|
|
|
|
|
* - Transition to state PE_Src_Startup
|
|
|
|
|
* SNK only ports shall transition to state Snk_Startup
|
|
|
|
|
* (see chapter 8.3.3.3.8).
|
|
|
|
|
* Similar, dual-mode ports in source mode should transition
|
|
|
|
|
* to PE_SNK_Transition_to_default.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_attached_state(port, true);
|
|
|
|
|
tcpm_set_state(port, SNK_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* Soft_Reset states */
|
|
|
|
|
case SOFT_RESET:
|
|
|
|
|
port->message_id = 0;
|
2017-05-09 10:04:56 -06:00
|
|
|
|
port->rx_msgid = -1;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, SNK_WAIT_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SOFT_RESET_SEND:
|
|
|
|
|
port->message_id = 0;
|
2017-05-09 10:04:56 -06:00
|
|
|
|
port->rx_msgid = -1;
|
2017-04-27 15:09:56 -06:00
|
|
|
|
if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
|
|
|
|
|
tcpm_set_state_cond(port, hard_reset_state(port), 0);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state_cond(port, hard_reset_state(port),
|
|
|
|
|
PD_T_SENDER_RESPONSE);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* DR_Swap states */
|
|
|
|
|
case DR_SWAP_SEND:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_DR_SWAP);
|
|
|
|
|
tcpm_set_state_cond(port, DR_SWAP_SEND_TIMEOUT,
|
|
|
|
|
PD_T_SENDER_RESPONSE);
|
|
|
|
|
break;
|
|
|
|
|
case DR_SWAP_ACCEPT:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
|
|
|
|
|
tcpm_set_state_cond(port, DR_SWAP_CHANGE_DR, 0);
|
|
|
|
|
break;
|
|
|
|
|
case DR_SWAP_SEND_TIMEOUT:
|
|
|
|
|
tcpm_swap_complete(port, -ETIMEDOUT);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case DR_SWAP_CHANGE_DR:
|
|
|
|
|
if (port->data_role == TYPEC_HOST) {
|
|
|
|
|
tcpm_unregister_altmodes(port);
|
|
|
|
|
tcpm_set_roles(port, true, port->pwr_role,
|
|
|
|
|
TYPEC_DEVICE);
|
|
|
|
|
} else {
|
|
|
|
|
tcpm_set_roles(port, true, port->pwr_role,
|
|
|
|
|
TYPEC_HOST);
|
|
|
|
|
port->send_discover = true;
|
|
|
|
|
}
|
|
|
|
|
tcpm_swap_complete(port, 0);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
/* PR_Swap states */
|
|
|
|
|
case PR_SWAP_ACCEPT:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_START, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SEND:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_PR_SWAP);
|
|
|
|
|
tcpm_set_state_cond(port, PR_SWAP_SEND_TIMEOUT,
|
|
|
|
|
PD_T_SENDER_RESPONSE);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SEND_TIMEOUT:
|
|
|
|
|
tcpm_swap_complete(port, -ETIMEDOUT);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_START:
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SRC_SNK_TRANSITION_OFF,
|
|
|
|
|
PD_T_SRC_TRANSITION);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SNK_SRC_SINK_OFF, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SRC_SNK_TRANSITION_OFF:
|
|
|
|
|
tcpm_set_vbus(port, false);
|
|
|
|
|
port->explicit_contract = false;
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
|
|
|
|
|
PD_T_PS_SOURCE_OFF);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SRC_SNK_SOURCE_OFF:
|
|
|
|
|
tcpm_set_cc(port, TYPEC_CC_RD);
|
2017-05-09 10:04:59 -06:00
|
|
|
|
/*
|
|
|
|
|
* USB-PD standard, 6.2.1.4, Port Power Role:
|
|
|
|
|
* "During the Power Role Swap Sequence, for the initial Source
|
|
|
|
|
* Port, the Port Power Role field shall be set to Sink in the
|
|
|
|
|
* PS_RDY Message indicating that the initial Source’s power
|
|
|
|
|
* supply is turned off"
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_pwr_role(port, TYPEC_SINK);
|
2017-04-27 15:09:56 -06:00
|
|
|
|
if (tcpm_pd_send_control(port, PD_CTRL_PS_RDY)) {
|
|
|
|
|
tcpm_set_state(port, ERROR_RECOVERY, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
tcpm_set_state_cond(port, SNK_UNATTACHED, PD_T_PS_SOURCE_ON);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SRC_SNK_SINK_ON:
|
|
|
|
|
tcpm_swap_complete(port, 0);
|
|
|
|
|
tcpm_set_state(port, SNK_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SNK_SRC_SINK_OFF:
|
|
|
|
|
tcpm_set_charge(port, false);
|
|
|
|
|
tcpm_set_state(port, hard_reset_state(port),
|
|
|
|
|
PD_T_PS_SOURCE_OFF);
|
|
|
|
|
break;
|
|
|
|
|
case PR_SWAP_SNK_SRC_SOURCE_ON:
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
tcpm_set_vbus(port, true);
|
2017-05-09 10:04:59 -06:00
|
|
|
|
/*
|
|
|
|
|
* USB PD standard, 6.2.1.4:
|
|
|
|
|
* "Subsequent Messages initiated by the Policy Engine,
|
|
|
|
|
* such as the PS_RDY Message sent to indicate that Vbus
|
|
|
|
|
* is ready, will have the Port Power Role field set to
|
|
|
|
|
* Source."
|
|
|
|
|
*/
|
2017-04-27 15:09:56 -06:00
|
|
|
|
tcpm_set_pwr_role(port, TYPEC_SOURCE);
|
2017-05-09 10:04:59 -06:00
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
|
2017-04-27 15:09:56 -06:00
|
|
|
|
tcpm_swap_complete(port, 0);
|
|
|
|
|
tcpm_set_state(port, SRC_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case VCONN_SWAP_ACCEPT:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_START, 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_SEND:
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_VCONN_SWAP);
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_SEND_TIMEOUT,
|
|
|
|
|
PD_T_SENDER_RESPONSE);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_SEND_TIMEOUT:
|
|
|
|
|
tcpm_swap_complete(port, -ETIMEDOUT);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_START:
|
|
|
|
|
if (port->vconn_role == TYPEC_SOURCE)
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_WAIT_FOR_VCONN, 0);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_TURN_ON_VCONN, 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_WAIT_FOR_VCONN:
|
|
|
|
|
tcpm_set_state(port, hard_reset_state(port),
|
|
|
|
|
PD_T_VCONN_SOURCE_ON);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_TURN_ON_VCONN:
|
|
|
|
|
tcpm_set_vconn(port, true);
|
|
|
|
|
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
|
|
|
|
|
tcpm_swap_complete(port, 0);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case VCONN_SWAP_TURN_OFF_VCONN:
|
|
|
|
|
tcpm_set_vconn(port, false);
|
|
|
|
|
tcpm_swap_complete(port, 0);
|
|
|
|
|
tcpm_set_state(port, ready_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case DR_SWAP_CANCEL:
|
|
|
|
|
case PR_SWAP_CANCEL:
|
|
|
|
|
case VCONN_SWAP_CANCEL:
|
|
|
|
|
tcpm_swap_complete(port, port->swap_status);
|
|
|
|
|
if (port->pwr_role == TYPEC_SOURCE)
|
|
|
|
|
tcpm_set_state(port, SRC_READY, 0);
|
|
|
|
|
else
|
|
|
|
|
tcpm_set_state(port, SNK_READY, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case BIST_RX:
|
|
|
|
|
switch (BDO_MODE_MASK(port->bist_request)) {
|
|
|
|
|
case BDO_MODE_CARRIER2:
|
|
|
|
|
tcpm_pd_transmit(port, TCPC_TX_BIST_MODE_2, NULL);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/* Always switch to unattached state */
|
|
|
|
|
tcpm_set_state(port, unattached_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
case ERROR_RECOVERY:
|
|
|
|
|
tcpm_swap_complete(port, -EPROTO);
|
|
|
|
|
tcpm_reset_port(port);
|
|
|
|
|
|
|
|
|
|
tcpm_set_cc(port, TYPEC_CC_OPEN);
|
|
|
|
|
tcpm_set_state(port, ERROR_RECOVERY_WAIT_OFF,
|
|
|
|
|
PD_T_ERROR_RECOVERY);
|
|
|
|
|
break;
|
|
|
|
|
case ERROR_RECOVERY_WAIT_OFF:
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
tcpm_default_state(port),
|
|
|
|
|
port->vbus_present ? PD_T_PS_SOURCE_OFF : 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
WARN(1, "Unexpected port state %d\n", port->state);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_state_machine_work(struct work_struct *work)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = container_of(work, struct tcpm_port,
|
|
|
|
|
state_machine.work);
|
|
|
|
|
enum tcpm_state prev_state;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
port->state_machine_running = true;
|
|
|
|
|
|
|
|
|
|
if (port->queued_message && tcpm_send_queued_message(port))
|
|
|
|
|
goto done;
|
|
|
|
|
|
|
|
|
|
/* If we were queued due to a delayed state change, update it now */
|
|
|
|
|
if (port->delayed_state) {
|
|
|
|
|
tcpm_log(port, "state change %s -> %s [delayed %ld ms]",
|
|
|
|
|
tcpm_states[port->state],
|
|
|
|
|
tcpm_states[port->delayed_state], port->delay_ms);
|
|
|
|
|
port->prev_state = port->state;
|
|
|
|
|
port->state = port->delayed_state;
|
|
|
|
|
port->delayed_state = INVALID_STATE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Continue running as long as we have (non-delayed) state changes
|
|
|
|
|
* to make.
|
|
|
|
|
*/
|
|
|
|
|
do {
|
|
|
|
|
prev_state = port->state;
|
|
|
|
|
run_state_machine(port);
|
|
|
|
|
if (port->queued_message)
|
|
|
|
|
tcpm_send_queued_message(port);
|
|
|
|
|
} while (port->state != prev_state && !port->delayed_state);
|
|
|
|
|
|
|
|
|
|
done:
|
|
|
|
|
port->state_machine_running = false;
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void _tcpm_cc_change(struct tcpm_port *port, enum typec_cc_status cc1,
|
|
|
|
|
enum typec_cc_status cc2)
|
|
|
|
|
{
|
|
|
|
|
enum typec_cc_status old_cc1, old_cc2;
|
|
|
|
|
enum tcpm_state new_state;
|
|
|
|
|
|
|
|
|
|
old_cc1 = port->cc1;
|
|
|
|
|
old_cc2 = port->cc2;
|
|
|
|
|
port->cc1 = cc1;
|
|
|
|
|
port->cc2 = cc2;
|
|
|
|
|
|
|
|
|
|
tcpm_log_force(port,
|
|
|
|
|
"CC1: %u -> %u, CC2: %u -> %u [state %s, polarity %d, %s]",
|
|
|
|
|
old_cc1, cc1, old_cc2, cc2, tcpm_states[port->state],
|
|
|
|
|
port->polarity,
|
|
|
|
|
tcpm_port_is_disconnected(port) ? "disconnected"
|
|
|
|
|
: "connected");
|
|
|
|
|
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case DRP_TOGGLING:
|
|
|
|
|
if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
|
|
|
|
|
tcpm_port_is_source(port))
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
|
|
|
|
|
else if (tcpm_port_is_sink(port))
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_UNATTACHED:
|
|
|
|
|
case ACC_UNATTACHED:
|
|
|
|
|
if (tcpm_port_is_debug(port) || tcpm_port_is_audio(port) ||
|
|
|
|
|
tcpm_port_is_source(port))
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_ATTACH_WAIT:
|
|
|
|
|
if (tcpm_port_is_disconnected(port) ||
|
|
|
|
|
tcpm_port_is_audio_detached(port))
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED, 0);
|
|
|
|
|
else if (cc1 != old_cc1 || cc2 != old_cc2)
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACH_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_ATTACHED:
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, SRC_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_UNATTACHED:
|
|
|
|
|
if (tcpm_port_is_sink(port))
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_ATTACH_WAIT:
|
|
|
|
|
if ((port->cc1 == TYPEC_CC_OPEN &&
|
|
|
|
|
port->cc2 != TYPEC_CC_OPEN) ||
|
|
|
|
|
(port->cc1 != TYPEC_CC_OPEN &&
|
|
|
|
|
port->cc2 == TYPEC_CC_OPEN))
|
|
|
|
|
new_state = SNK_DEBOUNCED;
|
|
|
|
|
else if (tcpm_port_is_disconnected(port))
|
|
|
|
|
new_state = SNK_UNATTACHED;
|
|
|
|
|
else
|
|
|
|
|
break;
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACH_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DEBOUNCED:
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
new_state = SNK_UNATTACHED;
|
|
|
|
|
else if (port->vbus_present)
|
|
|
|
|
new_state = tcpm_try_src(port) ? SRC_TRY : SNK_ATTACHED;
|
|
|
|
|
else
|
|
|
|
|
new_state = SNK_UNATTACHED;
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SNK_DEBOUNCED, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, unattached_state(port), 0);
|
|
|
|
|
else if (!port->pd_capable &&
|
|
|
|
|
(cc1 != old_cc1 || cc2 != old_cc2))
|
|
|
|
|
tcpm_set_current_limit(port,
|
|
|
|
|
tcpm_get_current_limit(port),
|
|
|
|
|
5000);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case AUDIO_ACC_ATTACHED:
|
|
|
|
|
if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
|
|
|
|
|
tcpm_set_state(port, AUDIO_ACC_DEBOUNCE, 0);
|
|
|
|
|
break;
|
|
|
|
|
case AUDIO_ACC_DEBOUNCE:
|
|
|
|
|
if (tcpm_port_is_audio(port))
|
|
|
|
|
tcpm_set_state(port, AUDIO_ACC_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case DEBUG_ACC_ATTACHED:
|
|
|
|
|
if (cc1 == TYPEC_CC_OPEN || cc2 == TYPEC_CC_OPEN)
|
|
|
|
|
tcpm_set_state(port, ACC_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_TRY:
|
|
|
|
|
/* Do nothing, waiting for timeout */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_DISCOVERY:
|
|
|
|
|
/* CC line is unstable, wait for debounce */
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, SNK_DISCOVERY_DEBOUNCE, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DISCOVERY_DEBOUNCE:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SRC_TRYWAIT:
|
|
|
|
|
/* Hand over to state machine if needed */
|
|
|
|
|
if (!port->vbus_present && tcpm_port_is_source(port))
|
|
|
|
|
new_state = SRC_ATTACHED;
|
|
|
|
|
else
|
|
|
|
|
new_state = SRC_TRYWAIT_UNATTACHED;
|
|
|
|
|
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRY_WAIT:
|
|
|
|
|
if (port->vbus_present && tcpm_port_is_sink(port)) {
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (!tcpm_port_is_sink(port))
|
|
|
|
|
new_state = SRC_TRYWAIT;
|
|
|
|
|
else
|
|
|
|
|
new_state = SRC_TRYWAIT_UNATTACHED;
|
|
|
|
|
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SNK_TRY_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SRC_TRY:
|
|
|
|
|
tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRY_DEBOUNCE:
|
|
|
|
|
tcpm_set_state(port, SRC_TRY, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT_DEBOUNCE:
|
|
|
|
|
if (port->vbus_present) {
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (tcpm_port_is_source(port)) {
|
|
|
|
|
tcpm_set_state(port, SRC_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (tcpm_port_is_disconnected(port) &&
|
|
|
|
|
port->delayed_state != SNK_UNATTACHED)
|
|
|
|
|
tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PR_SWAP_SNK_SRC_SINK_OFF:
|
|
|
|
|
case PR_SWAP_SRC_SNK_TRANSITION_OFF:
|
|
|
|
|
case PR_SWAP_SRC_SNK_SOURCE_OFF:
|
|
|
|
|
/*
|
|
|
|
|
* CC state change is expected here; we just turned off power.
|
|
|
|
|
* Ignore it.
|
|
|
|
|
*/
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
if (tcpm_port_is_disconnected(port))
|
|
|
|
|
tcpm_set_state(port, unattached_state(port), 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void _tcpm_pd_vbus_on(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum tcpm_state new_state;
|
|
|
|
|
|
|
|
|
|
tcpm_log_force(port, "VBUS on");
|
|
|
|
|
port->vbus_present = true;
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_TRANSITION_SINK_VBUS:
|
|
|
|
|
tcpm_set_state(port, SNK_READY, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_DISCOVERY:
|
|
|
|
|
tcpm_set_state(port, SNK_DISCOVERY, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_DEBOUNCED:
|
|
|
|
|
tcpm_set_state(port, tcpm_try_src(port) ? SRC_TRY
|
|
|
|
|
: SNK_ATTACHED,
|
|
|
|
|
0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_HARD_RESET_WAIT_VBUS:
|
|
|
|
|
tcpm_set_state(port, SNK_HARD_RESET_SINK_ON, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_ATTACHED:
|
|
|
|
|
tcpm_set_state(port, SRC_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_HARD_RESET_VBUS_ON:
|
|
|
|
|
tcpm_set_state(port, SRC_STARTUP, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_TRY:
|
|
|
|
|
/* Do nothing, waiting for timeout */
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRYWAIT:
|
|
|
|
|
/* Hand over to state machine if needed */
|
|
|
|
|
if (port->delayed_state != SRC_TRYWAIT_UNATTACHED)
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRY_WAIT:
|
|
|
|
|
if (tcpm_port_is_sink(port)) {
|
|
|
|
|
tcpm_set_state(port, SNK_ATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (!tcpm_port_is_sink(port))
|
|
|
|
|
new_state = SRC_TRYWAIT;
|
|
|
|
|
else
|
|
|
|
|
new_state = SRC_TRYWAIT_UNATTACHED;
|
|
|
|
|
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SNK_TRY_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT:
|
|
|
|
|
tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void _tcpm_pd_vbus_off(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum tcpm_state new_state;
|
|
|
|
|
|
|
|
|
|
tcpm_log_force(port, "VBUS off");
|
|
|
|
|
port->vbus_present = false;
|
|
|
|
|
port->vbus_never_low = false;
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_HARD_RESET_SINK_OFF:
|
|
|
|
|
tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SRC_HARD_RESET_VBUS_OFF:
|
|
|
|
|
tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
|
|
|
|
|
break;
|
|
|
|
|
case HARD_RESET_SEND:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_TRY:
|
|
|
|
|
/* Do nothing, waiting for timeout */
|
|
|
|
|
break;
|
|
|
|
|
case SRC_TRYWAIT:
|
|
|
|
|
/* Hand over to state machine if needed */
|
|
|
|
|
if (tcpm_port_is_source(port))
|
|
|
|
|
new_state = SRC_ATTACHED;
|
|
|
|
|
else
|
|
|
|
|
new_state = SRC_TRYWAIT_UNATTACHED;
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRY_WAIT:
|
|
|
|
|
if (!tcpm_port_is_sink(port))
|
|
|
|
|
new_state = SRC_TRYWAIT;
|
|
|
|
|
else
|
|
|
|
|
new_state = SRC_TRYWAIT_UNATTACHED;
|
|
|
|
|
|
|
|
|
|
if (new_state != port->delayed_state)
|
|
|
|
|
tcpm_set_state(port, SNK_TRY_WAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
case SNK_TRYWAIT_VBUS:
|
|
|
|
|
tcpm_set_state(port, SNK_TRYWAIT, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_ATTACH_WAIT:
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case SNK_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PR_SWAP_SRC_SNK_TRANSITION_OFF:
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF, 0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case PR_SWAP_SNK_SRC_SINK_OFF:
|
|
|
|
|
/* Do nothing, expected */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case ERROR_RECOVERY_WAIT_OFF:
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
port->pwr_role == TYPEC_SOURCE ?
|
|
|
|
|
SRC_UNATTACHED : SNK_UNATTACHED,
|
|
|
|
|
0);
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
if (port->pwr_role == TYPEC_SINK &&
|
|
|
|
|
port->attached)
|
|
|
|
|
tcpm_set_state(port, SNK_UNATTACHED, 0);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void _tcpm_pd_hard_reset(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
tcpm_log_force(port, "Received hard reset");
|
|
|
|
|
/*
|
|
|
|
|
* If we keep receiving hard reset requests, executing the hard reset
|
|
|
|
|
* must have failed. Revert to error recovery if that happens.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port,
|
|
|
|
|
port->hard_reset_count < PD_N_HARD_RESET_COUNT ?
|
|
|
|
|
HARD_RESET_START : ERROR_RECOVERY,
|
|
|
|
|
0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_pd_event_handler(struct work_struct *work)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = container_of(work, struct tcpm_port,
|
|
|
|
|
event_work);
|
|
|
|
|
u32 events;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
spin_lock(&port->pd_event_lock);
|
|
|
|
|
while (port->pd_events) {
|
|
|
|
|
events = port->pd_events;
|
|
|
|
|
port->pd_events = 0;
|
|
|
|
|
spin_unlock(&port->pd_event_lock);
|
|
|
|
|
if (events & TCPM_RESET_EVENT)
|
|
|
|
|
_tcpm_pd_hard_reset(port);
|
|
|
|
|
if (events & TCPM_VBUS_EVENT) {
|
|
|
|
|
bool vbus;
|
|
|
|
|
|
|
|
|
|
vbus = port->tcpc->get_vbus(port->tcpc);
|
|
|
|
|
if (vbus)
|
|
|
|
|
_tcpm_pd_vbus_on(port);
|
|
|
|
|
else
|
|
|
|
|
_tcpm_pd_vbus_off(port);
|
|
|
|
|
}
|
|
|
|
|
if (events & TCPM_CC_EVENT) {
|
|
|
|
|
enum typec_cc_status cc1, cc2;
|
|
|
|
|
|
|
|
|
|
if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
|
|
|
|
|
_tcpm_cc_change(port, cc1, cc2);
|
|
|
|
|
}
|
|
|
|
|
spin_lock(&port->pd_event_lock);
|
|
|
|
|
}
|
|
|
|
|
spin_unlock(&port->pd_event_lock);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void tcpm_cc_change(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
spin_lock(&port->pd_event_lock);
|
|
|
|
|
port->pd_events |= TCPM_CC_EVENT;
|
|
|
|
|
spin_unlock(&port->pd_event_lock);
|
|
|
|
|
queue_work(port->wq, &port->event_work);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_cc_change);
|
|
|
|
|
|
|
|
|
|
void tcpm_vbus_change(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
spin_lock(&port->pd_event_lock);
|
|
|
|
|
port->pd_events |= TCPM_VBUS_EVENT;
|
|
|
|
|
spin_unlock(&port->pd_event_lock);
|
|
|
|
|
queue_work(port->wq, &port->event_work);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_vbus_change);
|
|
|
|
|
|
|
|
|
|
void tcpm_pd_hard_reset(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
spin_lock(&port->pd_event_lock);
|
|
|
|
|
port->pd_events = TCPM_RESET_EVENT;
|
|
|
|
|
spin_unlock(&port->pd_event_lock);
|
|
|
|
|
queue_work(port->wq, &port->event_work);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
|
|
|
|
|
|
|
|
|
|
static int tcpm_dr_set(const struct typec_capability *cap,
|
|
|
|
|
enum typec_data_role data)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = typec_cap_to_tcpm(cap);
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->swap_lock);
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
if (port->typec_caps.type != TYPEC_PORT_DRP || !port->pd_capable) {
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
if (port->state != SRC_READY && port->state != SNK_READY) {
|
|
|
|
|
ret = -EAGAIN;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (port->data_role == data) {
|
|
|
|
|
ret = 0;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* XXX
|
|
|
|
|
* 6.3.9: If an alternate mode is active, a request to swap
|
|
|
|
|
* alternate modes shall trigger a port reset.
|
|
|
|
|
* Reject data role swap request in this case.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
port->swap_status = 0;
|
|
|
|
|
port->swap_pending = true;
|
|
|
|
|
reinit_completion(&port->swap_complete);
|
|
|
|
|
tcpm_set_state(port, DR_SWAP_SEND, 0);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
|
|
|
|
|
wait_for_completion(&port->swap_complete);
|
|
|
|
|
|
|
|
|
|
ret = port->swap_status;
|
|
|
|
|
goto swap_unlock;
|
|
|
|
|
|
|
|
|
|
port_unlock:
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
swap_unlock:
|
|
|
|
|
mutex_unlock(&port->swap_lock);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_pr_set(const struct typec_capability *cap,
|
|
|
|
|
enum typec_role role)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = typec_cap_to_tcpm(cap);
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->swap_lock);
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
if (port->typec_caps.type != TYPEC_PORT_DRP) {
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
if (port->state != SRC_READY && port->state != SNK_READY) {
|
|
|
|
|
ret = -EAGAIN;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (role == port->pwr_role) {
|
|
|
|
|
ret = 0;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!port->pd_capable) {
|
|
|
|
|
/*
|
|
|
|
|
* If the partner is not PD capable, reset the port to
|
|
|
|
|
* trigger a role change. This can only work if a preferred
|
|
|
|
|
* role is configured, and if it matches the requested role.
|
|
|
|
|
*/
|
|
|
|
|
if (port->try_role == TYPEC_NO_PREFERRED_ROLE ||
|
|
|
|
|
port->try_role == port->pwr_role) {
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
tcpm_set_state(port, HARD_RESET_SEND, 0);
|
|
|
|
|
ret = 0;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
port->swap_status = 0;
|
|
|
|
|
port->swap_pending = true;
|
|
|
|
|
reinit_completion(&port->swap_complete);
|
|
|
|
|
tcpm_set_state(port, PR_SWAP_SEND, 0);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
|
|
|
|
|
wait_for_completion(&port->swap_complete);
|
|
|
|
|
|
|
|
|
|
ret = port->swap_status;
|
|
|
|
|
goto swap_unlock;
|
|
|
|
|
|
|
|
|
|
port_unlock:
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
swap_unlock:
|
|
|
|
|
mutex_unlock(&port->swap_lock);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_vconn_set(const struct typec_capability *cap,
|
|
|
|
|
enum typec_role role)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = typec_cap_to_tcpm(cap);
|
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->swap_lock);
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
|
|
|
|
|
if (port->state != SRC_READY && port->state != SNK_READY) {
|
|
|
|
|
ret = -EAGAIN;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (role == port->vconn_role) {
|
|
|
|
|
ret = 0;
|
|
|
|
|
goto port_unlock;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
port->swap_status = 0;
|
|
|
|
|
port->swap_pending = true;
|
|
|
|
|
reinit_completion(&port->swap_complete);
|
|
|
|
|
tcpm_set_state(port, VCONN_SWAP_SEND, 0);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
|
|
|
|
|
wait_for_completion(&port->swap_complete);
|
|
|
|
|
|
|
|
|
|
ret = port->swap_status;
|
|
|
|
|
goto swap_unlock;
|
|
|
|
|
|
|
|
|
|
port_unlock:
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
swap_unlock:
|
|
|
|
|
mutex_unlock(&port->swap_lock);
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int tcpm_try_role(const struct typec_capability *cap, int role)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port = typec_cap_to_tcpm(cap);
|
|
|
|
|
struct tcpc_dev *tcpc = port->tcpc;
|
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
if (tcpc->try_role)
|
|
|
|
|
ret = tcpc->try_role(tcpc, role);
|
|
|
|
|
if (!ret && !tcpc->config->try_role_hw)
|
|
|
|
|
port->try_role = role;
|
|
|
|
|
port->try_src_count = 0;
|
|
|
|
|
port->try_snk_count = 0;
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void tcpm_init(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
enum typec_cc_status cc1, cc2;
|
|
|
|
|
|
|
|
|
|
port->tcpc->init(port->tcpc);
|
|
|
|
|
|
|
|
|
|
tcpm_reset_port(port);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* XXX
|
|
|
|
|
* Should possibly wait for VBUS to settle if it was enabled locally
|
|
|
|
|
* since tcpm_reset_port() will disable VBUS.
|
|
|
|
|
*/
|
|
|
|
|
port->vbus_present = port->tcpc->get_vbus(port->tcpc);
|
|
|
|
|
if (port->vbus_present)
|
|
|
|
|
port->vbus_never_low = true;
|
|
|
|
|
|
|
|
|
|
tcpm_set_state(port, tcpm_default_state(port), 0);
|
|
|
|
|
|
|
|
|
|
if (port->tcpc->get_cc(port->tcpc, &cc1, &cc2) == 0)
|
|
|
|
|
_tcpm_cc_change(port, cc1, cc2);
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Some adapters need a clean slate at startup, and won't recover
|
|
|
|
|
* otherwise. So do not try to be fancy and force a clean disconnect.
|
|
|
|
|
*/
|
|
|
|
|
tcpm_set_state(port, ERROR_RECOVERY, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void tcpm_tcpc_reset(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
/* XXX: Maintain PD connection if possible? */
|
|
|
|
|
tcpm_init(port);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_tcpc_reset);
|
|
|
|
|
|
|
|
|
|
static int tcpm_copy_pdos(u32 *dest_pdo, const u32 *src_pdo,
|
|
|
|
|
unsigned int nr_pdo)
|
|
|
|
|
{
|
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
|
|
if (nr_pdo > PDO_MAX_OBJECTS)
|
|
|
|
|
nr_pdo = PDO_MAX_OBJECTS;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nr_pdo; i++)
|
|
|
|
|
dest_pdo[i] = src_pdo[i];
|
|
|
|
|
|
|
|
|
|
return nr_pdo;
|
|
|
|
|
}
|
|
|
|
|
|
2017-05-09 10:04:58 -06:00
|
|
|
|
static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
|
|
|
|
|
unsigned int nr_vdo)
|
|
|
|
|
{
|
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
|
|
if (nr_vdo > VDO_MAX_OBJECTS)
|
|
|
|
|
nr_vdo = VDO_MAX_OBJECTS;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < nr_vdo; i++)
|
|
|
|
|
dest_vdo[i] = src_vdo[i];
|
|
|
|
|
|
|
|
|
|
return nr_vdo;
|
|
|
|
|
}
|
|
|
|
|
|
2017-04-27 15:09:56 -06:00
|
|
|
|
void tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
|
|
|
|
|
unsigned int nr_pdo)
|
|
|
|
|
{
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, pdo, nr_pdo);
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SRC_UNATTACHED:
|
|
|
|
|
case SRC_ATTACH_WAIT:
|
|
|
|
|
case SRC_TRYWAIT:
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
break;
|
|
|
|
|
case SRC_SEND_CAPABILITIES:
|
|
|
|
|
case SRC_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
case SRC_READY:
|
|
|
|
|
case SRC_WAIT_NEW_CAPABILITIES:
|
|
|
|
|
tcpm_set_cc(port, tcpm_rp_cc(port));
|
|
|
|
|
tcpm_set_state(port, SRC_SEND_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
|
|
|
|
|
|
|
|
|
|
void tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
|
|
|
|
|
unsigned int nr_pdo,
|
|
|
|
|
unsigned int max_snk_mv,
|
|
|
|
|
unsigned int max_snk_ma,
|
|
|
|
|
unsigned int max_snk_mw,
|
|
|
|
|
unsigned int operating_snk_mw)
|
|
|
|
|
{
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
|
|
|
|
|
port->max_snk_mv = max_snk_mv;
|
|
|
|
|
port->max_snk_ma = max_snk_ma;
|
|
|
|
|
port->max_snk_mw = max_snk_mw;
|
|
|
|
|
port->operating_snk_mw = operating_snk_mw;
|
|
|
|
|
|
|
|
|
|
switch (port->state) {
|
|
|
|
|
case SNK_NEGOTIATE_CAPABILITIES:
|
|
|
|
|
case SNK_READY:
|
|
|
|
|
case SNK_TRANSITION_SINK:
|
|
|
|
|
case SNK_TRANSITION_SINK_VBUS:
|
|
|
|
|
tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
|
|
|
|
|
|
|
|
|
|
struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
|
|
|
|
|
{
|
|
|
|
|
struct tcpm_port *port;
|
|
|
|
|
int i, err;
|
|
|
|
|
|
|
|
|
|
if (!dev || !tcpc || !tcpc->config ||
|
|
|
|
|
!tcpc->get_vbus || !tcpc->set_cc || !tcpc->get_cc ||
|
|
|
|
|
!tcpc->set_polarity || !tcpc->set_vconn || !tcpc->set_vbus ||
|
|
|
|
|
!tcpc->set_pd_rx || !tcpc->set_roles || !tcpc->pd_transmit)
|
|
|
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
|
|
|
|
|
|
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
|
|
|
|
|
if (!port)
|
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
|
|
|
|
|
port->dev = dev;
|
|
|
|
|
port->tcpc = tcpc;
|
|
|
|
|
|
|
|
|
|
mutex_init(&port->lock);
|
|
|
|
|
mutex_init(&port->swap_lock);
|
|
|
|
|
|
|
|
|
|
port->wq = create_singlethread_workqueue(dev_name(dev));
|
|
|
|
|
if (!port->wq)
|
|
|
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
|
INIT_DELAYED_WORK(&port->state_machine, tcpm_state_machine_work);
|
|
|
|
|
INIT_DELAYED_WORK(&port->vdm_state_machine, vdm_state_machine_work);
|
|
|
|
|
INIT_WORK(&port->event_work, tcpm_pd_event_handler);
|
|
|
|
|
|
|
|
|
|
spin_lock_init(&port->pd_event_lock);
|
|
|
|
|
|
|
|
|
|
init_completion(&port->tx_complete);
|
|
|
|
|
init_completion(&port->swap_complete);
|
|
|
|
|
|
|
|
|
|
port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcpc->config->src_pdo,
|
|
|
|
|
tcpc->config->nr_src_pdo);
|
|
|
|
|
port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcpc->config->snk_pdo,
|
|
|
|
|
tcpc->config->nr_snk_pdo);
|
2017-05-09 10:04:58 -06:00
|
|
|
|
port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcpc->config->snk_vdo,
|
|
|
|
|
tcpc->config->nr_snk_vdo);
|
2017-04-27 15:09:56 -06:00
|
|
|
|
|
|
|
|
|
port->max_snk_mv = tcpc->config->max_snk_mv;
|
|
|
|
|
port->max_snk_ma = tcpc->config->max_snk_ma;
|
|
|
|
|
port->max_snk_mw = tcpc->config->max_snk_mw;
|
|
|
|
|
port->operating_snk_mw = tcpc->config->operating_snk_mw;
|
|
|
|
|
if (!tcpc->config->try_role_hw)
|
|
|
|
|
port->try_role = tcpc->config->default_role;
|
|
|
|
|
else
|
|
|
|
|
port->try_role = TYPEC_NO_PREFERRED_ROLE;
|
|
|
|
|
|
|
|
|
|
port->typec_caps.prefer_role = tcpc->config->default_role;
|
|
|
|
|
port->typec_caps.type = tcpc->config->type;
|
|
|
|
|
port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
|
|
|
|
|
port->typec_caps.pd_revision = 0x0200; /* USB-PD spec release 2.0 */
|
|
|
|
|
port->typec_caps.dr_set = tcpm_dr_set;
|
|
|
|
|
port->typec_caps.pr_set = tcpm_pr_set;
|
|
|
|
|
port->typec_caps.vconn_set = tcpm_vconn_set;
|
|
|
|
|
port->typec_caps.try_role = tcpm_try_role;
|
|
|
|
|
|
|
|
|
|
port->partner_desc.identity = &port->partner_ident;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* TODO:
|
|
|
|
|
* - alt_modes, set_alt_mode
|
|
|
|
|
* - {debug,audio}_accessory
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
port->typec_port = typec_register_port(port->dev, &port->typec_caps);
|
|
|
|
|
if (!port->typec_port) {
|
|
|
|
|
err = -ENOMEM;
|
|
|
|
|
goto out_destroy_wq;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (tcpc->config->alt_modes) {
|
|
|
|
|
struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
|
|
|
|
|
|
|
|
|
|
i = 0;
|
|
|
|
|
while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
|
|
|
|
|
port->port_altmode[i] =
|
|
|
|
|
typec_port_register_altmode(port->typec_port,
|
|
|
|
|
paltmode);
|
|
|
|
|
if (!port->port_altmode[i]) {
|
|
|
|
|
tcpm_log(port,
|
|
|
|
|
"%s: failed to register port alternate mode 0x%x",
|
|
|
|
|
dev_name(dev), paltmode->svid);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
i++;
|
|
|
|
|
paltmode++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
tcpm_debugfs_init(port);
|
|
|
|
|
mutex_lock(&port->lock);
|
|
|
|
|
tcpm_init(port);
|
|
|
|
|
mutex_unlock(&port->lock);
|
|
|
|
|
|
|
|
|
|
tcpm_log(port, "%s: registered", dev_name(dev));
|
|
|
|
|
return port;
|
|
|
|
|
|
|
|
|
|
out_destroy_wq:
|
|
|
|
|
destroy_workqueue(port->wq);
|
|
|
|
|
return ERR_PTR(err);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_register_port);
|
|
|
|
|
|
|
|
|
|
void tcpm_unregister_port(struct tcpm_port *port)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
|
|
|
|
|
typec_unregister_altmode(port->port_altmode[i]);
|
|
|
|
|
typec_unregister_port(port->typec_port);
|
|
|
|
|
tcpm_debugfs_exit(port);
|
|
|
|
|
destroy_workqueue(port->wq);
|
|
|
|
|
}
|
|
|
|
|
EXPORT_SYMBOL_GPL(tcpm_unregister_port);
|
|
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Guenter Roeck <groeck@chromium.org>");
|
|
|
|
|
MODULE_DESCRIPTION("USB Type-C Port Manager");
|
|
|
|
|
MODULE_LICENSE("GPL");
|