4852 lines
120 KiB
C
4852 lines
120 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2015-2017 Google, Inc
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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/jiffies.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/power_supply.h>
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#include <linux/proc_fs.h>
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#include <linux/property.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/pd.h>
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#include <linux/usb/pd_ado.h>
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#include <linux/usb/pd_bdo.h>
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#include <linux/usb/pd_ext_sdb.h>
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#include <linux/usb/pd_vdo.h>
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#include <linux/usb/role.h>
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#include <linux/usb/tcpm.h>
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#include <linux/usb/typec_altmode.h>
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#include <linux/workqueue.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_NEGOTIATE_PPS_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_SOURCE_OFF_CC_DEBOUNCED), \
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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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S(PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP), \
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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(SNK_TRY_WAIT_DEBOUNCE), \
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S(SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS), \
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S(SRC_TRYWAIT), \
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S(SRC_TRYWAIT_DEBOUNCE), \
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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_WAIT), \
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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(GET_STATUS_SEND), \
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S(GET_STATUS_SEND_TIMEOUT), \
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S(GET_PPS_STATUS_SEND), \
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S(GET_PPS_STATUS_SEND_TIMEOUT), \
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\
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S(ERROR_RECOVERY), \
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S(PORT_RESET), \
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S(PORT_RESET_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_CTRL_NOT_SUPP,
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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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#define ALTMODE_DISCOVERY_MAX (SVID_DISCOVERY_MAX * MODE_DISCOVERY_MAX)
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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[ALTMODE_DISCOVERY_MAX];
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};
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struct pd_pps_data {
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u32 min_volt;
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u32 max_volt;
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u32 max_curr;
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u32 out_volt;
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u32 op_curr;
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bool supported;
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bool active;
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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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struct usb_role_switch *role_sw;
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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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enum typec_port_type port_type;
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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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bool non_pd_role_swap;
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struct completion swap_complete;
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int swap_status;
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unsigned int negotiated_rev;
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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 operating_snk_mw;
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bool update_sink_caps;
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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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/* Used to export TA voltage and current */
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struct power_supply *psy;
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struct power_supply_desc psy_desc;
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enum power_supply_usb_type usb_type;
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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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/* PPS */
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struct pd_pps_data pps_data;
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struct completion pps_complete;
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bool pps_pending;
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int pps_status;
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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[ALTMODE_DISCOVERY_MAX];
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struct typec_altmode *port_altmode[ALTMODE_DISCOVERY_MAX];
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/* Deadline in jiffies to exit src_try_wait state */
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unsigned long max_wait;
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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))
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#define tcpm_port_is_audio(port) \
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(tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_audio((port)->cc2))
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#define tcpm_port_is_audio_detached(port) \
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((tcpm_cc_is_audio((port)->cc1) && tcpm_cc_is_open((port)->cc2)) || \
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(tcpm_cc_is_audio((port)->cc2) && tcpm_cc_is_open((port)->cc1)))
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#define tcpm_try_snk(port) \
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((port)->try_snk_count == 0 && (port)->try_role == TYPEC_SINK && \
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(port)->port_type == TYPEC_PORT_DRP)
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#define tcpm_try_src(port) \
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((port)->try_src_count == 0 && (port)->try_role == TYPEC_SOURCE && \
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(port)->port_type == TYPEC_PORT_DRP)
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static enum tcpm_state tcpm_default_state(struct tcpm_port *port)
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{
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if (port->port_type == TYPEC_PORT_DRP) {
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if (port->try_role == TYPEC_SINK)
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return SNK_UNATTACHED;
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else if (port->try_role == TYPEC_SOURCE)
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return SRC_UNATTACHED;
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else if (port->tcpc->config->default_role == TYPEC_SINK)
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return SNK_UNATTACHED;
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/* Fall through to return SRC_UNATTACHED */
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} else if (port->port_type == TYPEC_PORT_SNK) {
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return SNK_UNATTACHED;
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}
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return SRC_UNATTACHED;
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}
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static inline
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struct tcpm_port *typec_cap_to_tcpm(const struct typec_capability *cap)
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{
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return container_of(cap, struct tcpm_port, typec_caps);
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}
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static bool tcpm_port_is_disconnected(struct tcpm_port *port)
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{
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return (!port->attached && port->cc1 == TYPEC_CC_OPEN &&
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port->cc2 == TYPEC_CC_OPEN) ||
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(port->attached && ((port->polarity == TYPEC_POLARITY_CC1 &&
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port->cc1 == TYPEC_CC_OPEN) ||
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(port->polarity == TYPEC_POLARITY_CC2 &&
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port->cc2 == TYPEC_CC_OPEN)));
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}
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/*
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* Logging
|
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*/
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#ifdef CONFIG_DEBUG_FS
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static bool tcpm_log_full(struct tcpm_port *port)
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{
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return port->logbuffer_tail ==
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(port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
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}
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__printf(2, 0)
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static void _tcpm_log(struct tcpm_port *port, const char *fmt, va_list args)
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{
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char tmpbuffer[LOG_BUFFER_ENTRY_SIZE];
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u64 ts_nsec = local_clock();
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unsigned long rem_nsec;
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mutex_lock(&port->logbuffer_lock);
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if (!port->logbuffer[port->logbuffer_head]) {
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port->logbuffer[port->logbuffer_head] =
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kzalloc(LOG_BUFFER_ENTRY_SIZE, GFP_KERNEL);
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if (!port->logbuffer[port->logbuffer_head]) {
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mutex_unlock(&port->logbuffer_lock);
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return;
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}
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}
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vsnprintf(tmpbuffer, sizeof(tmpbuffer), fmt, args);
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if (tcpm_log_full(port)) {
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port->logbuffer_head = max(port->logbuffer_head - 1, 0);
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strcpy(tmpbuffer, "overflow");
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}
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if (port->logbuffer_head < 0 ||
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port->logbuffer_head >= LOG_BUFFER_ENTRIES) {
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dev_warn(port->dev,
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"Bad log buffer index %d\n", port->logbuffer_head);
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goto abort;
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}
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if (!port->logbuffer[port->logbuffer_head]) {
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dev_warn(port->dev,
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"Log buffer index %d is NULL\n", port->logbuffer_head);
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goto abort;
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}
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rem_nsec = do_div(ts_nsec, 1000000000);
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scnprintf(port->logbuffer[port->logbuffer_head],
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LOG_BUFFER_ENTRY_SIZE, "[%5lu.%06lu] %s",
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(unsigned long)ts_nsec, rem_nsec / 1000,
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tmpbuffer);
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port->logbuffer_head = (port->logbuffer_head + 1) % LOG_BUFFER_ENTRIES;
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|
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abort:
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mutex_unlock(&port->logbuffer_lock);
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}
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|
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__printf(2, 3)
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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))
|
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return;
|
||
|
||
va_start(args, fmt);
|
||
_tcpm_log(port, fmt, args);
|
||
va_end(args);
|
||
}
|
||
|
||
__printf(2, 3)
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||
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;
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo) == APDO_TYPE_PPS)
|
||
scnprintf(msg, sizeof(msg),
|
||
"%u-%u mV, %u mA",
|
||
pdo_pps_apdo_min_voltage(pdo),
|
||
pdo_pps_apdo_max_voltage(pdo),
|
||
pdo_pps_apdo_max_current(pdo));
|
||
else
|
||
strcpy(msg, "undefined APDO");
|
||
break;
|
||
default:
|
||
strcpy(msg, "undefined");
|
||
break;
|
||
}
|
||
tcpm_log(port, " PDO %d: type %d, %s",
|
||
i, type, msg);
|
||
}
|
||
}
|
||
|
||
static int tcpm_debug_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;
|
||
}
|
||
DEFINE_SHOW_ATTRIBUTE(tcpm_debug);
|
||
|
||
static struct dentry *rootdir;
|
||
|
||
static void 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);
|
||
|
||
port->dentry = debugfs_create_file(dev_name(port->dev),
|
||
S_IFREG | 0444, rootdir,
|
||
port, &tcpm_debug_fops);
|
||
}
|
||
|
||
static void tcpm_debugfs_exit(struct tcpm_port *port)
|
||
{
|
||
debugfs_remove(port->dentry);
|
||
}
|
||
|
||
#else
|
||
|
||
__printf(2, 3)
|
||
static void tcpm_log(const struct tcpm_port *port, const char *fmt, ...) { }
|
||
__printf(2, 3)
|
||
static void tcpm_log_force(struct tcpm_port *port, const char *fmt, ...) { }
|
||
static void tcpm_log_source_caps(struct tcpm_port *port) { }
|
||
static void tcpm_debugfs_init(const struct tcpm_port *port) { }
|
||
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, int state,
|
||
enum usb_role usb_role,
|
||
enum typec_orientation orientation)
|
||
{
|
||
int ret;
|
||
|
||
tcpm_log(port, "Requesting mux state %d, usb-role %d, orientation %d",
|
||
state, usb_role, orientation);
|
||
|
||
ret = typec_set_orientation(port->typec_port, orientation);
|
||
if (ret)
|
||
return ret;
|
||
|
||
if (port->role_sw) {
|
||
ret = usb_role_switch_set_role(port->role_sw, usb_role);
|
||
if (ret)
|
||
return ret;
|
||
}
|
||
|
||
return typec_set_mode(port->typec_port, state);
|
||
}
|
||
|
||
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:
|
||
if (port->tcpc->get_current_limit)
|
||
limit = port->tcpc->get_current_limit(port->tcpc);
|
||
else
|
||
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);
|
||
|
||
port->supply_voltage = mv;
|
||
port->current_limit = 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)
|
||
{
|
||
enum typec_orientation orientation;
|
||
enum usb_role usb_role;
|
||
int ret;
|
||
|
||
if (port->polarity == TYPEC_POLARITY_CC1)
|
||
orientation = TYPEC_ORIENTATION_NORMAL;
|
||
else
|
||
orientation = TYPEC_ORIENTATION_REVERSE;
|
||
|
||
if (data == TYPEC_HOST)
|
||
usb_role = USB_ROLE_HOST;
|
||
else
|
||
usb_role = USB_ROLE_DEVICE;
|
||
|
||
ret = tcpm_mux_set(port, TYPEC_STATE_USB, usb_role, orientation);
|
||
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->negotiated_rev,
|
||
port->message_id, 0);
|
||
} else {
|
||
msg.header = PD_HEADER_LE(PD_DATA_SOURCE_CAP,
|
||
port->pwr_role,
|
||
port->data_role,
|
||
port->negotiated_rev,
|
||
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->negotiated_rev,
|
||
port->message_id, 0);
|
||
} else {
|
||
msg.header = PD_HEADER_LE(PD_DATA_SINK_CAP,
|
||
port->pwr_role,
|
||
port->data_role,
|
||
port->negotiated_rev,
|
||
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));
|
||
|
||
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;
|
||
int i;
|
||
|
||
if (pmdata->altmodes >= ARRAY_SIZE(port->partner_altmode)) {
|
||
/* Already logged in svdm_consume_svids() */
|
||
return;
|
||
}
|
||
|
||
for (i = 1; i < cnt; i++) {
|
||
paltmode = &pmdata->altmode_desc[pmdata->altmodes];
|
||
memset(paltmode, 0, sizeof(*paltmode));
|
||
|
||
paltmode->svid = pmdata->svids[pmdata->svid_index];
|
||
paltmode->mode = i;
|
||
paltmode->vdo = le32_to_cpu(payload[i]);
|
||
|
||
tcpm_log(port, " Alternate mode %d: SVID 0x%04x, VDO %d: 0x%08x",
|
||
pmdata->altmodes, paltmode->svid,
|
||
paltmode->mode, paltmode->vdo);
|
||
|
||
pmdata->altmodes++;
|
||
}
|
||
}
|
||
|
||
static void tcpm_register_partner_altmodes(struct tcpm_port *port)
|
||
{
|
||
struct pd_mode_data *modep = &port->mode_data;
|
||
struct typec_altmode *altmode;
|
||
int i;
|
||
|
||
for (i = 0; i < modep->altmodes; i++) {
|
||
altmode = typec_partner_register_altmode(port->partner,
|
||
&modep->altmode_desc[i]);
|
||
if (!altmode)
|
||
tcpm_log(port, "Failed to register partner SVID 0x%04x",
|
||
modep->altmode_desc[i].svid);
|
||
port->partner_altmode[i] = altmode;
|
||
}
|
||
}
|
||
|
||
#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)
|
||
{
|
||
struct typec_altmode *adev;
|
||
struct typec_altmode *pdev;
|
||
struct pd_mode_data *modep;
|
||
u32 p[PD_MAX_PAYLOAD];
|
||
int rlen = 0;
|
||
int cmd_type;
|
||
int cmd;
|
||
int i;
|
||
|
||
for (i = 0; i < cnt; i++)
|
||
p[i] = le32_to_cpu(payload[i]);
|
||
|
||
cmd_type = PD_VDO_CMDT(p[0]);
|
||
cmd = PD_VDO_CMD(p[0]);
|
||
|
||
tcpm_log(port, "Rx VDM cmd 0x%x type %d cmd %d len %d",
|
||
p[0], cmd_type, cmd, cnt);
|
||
|
||
modep = &port->mode_data;
|
||
|
||
adev = typec_match_altmode(port->port_altmode, ALTMODE_DISCOVERY_MAX,
|
||
PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
|
||
|
||
pdev = typec_match_altmode(port->partner_altmode, ALTMODE_DISCOVERY_MAX,
|
||
PD_VDO_VID(p[0]), PD_VDO_OPOS(p[0]));
|
||
|
||
switch (cmd_type) {
|
||
case CMDT_INIT:
|
||
switch (cmd) {
|
||
case CMD_DISCOVER_IDENT:
|
||
/* 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] = port->snk_vdo[i];
|
||
rlen = port->nr_snk_vdo + 1;
|
||
}
|
||
break;
|
||
case CMD_DISCOVER_SVID:
|
||
break;
|
||
case CMD_DISCOVER_MODES:
|
||
break;
|
||
case CMD_ENTER_MODE:
|
||
break;
|
||
case CMD_EXIT_MODE:
|
||
break;
|
||
case CMD_ATTENTION:
|
||
/* Attention command does not have response */
|
||
typec_altmode_attention(adev, p[1]);
|
||
return 0;
|
||
default:
|
||
break;
|
||
}
|
||
if (rlen >= 1) {
|
||
response[0] = p[0] | VDO_CMDT(CMDT_RSP_ACK);
|
||
} else if (rlen == 0) {
|
||
response[0] = p[0] | VDO_CMDT(CMDT_RSP_NAK);
|
||
rlen = 1;
|
||
} else {
|
||
response[0] = p[0] | VDO_CMDT(CMDT_RSP_BUSY);
|
||
rlen = 1;
|
||
}
|
||
break;
|
||
case CMDT_RSP_ACK:
|
||
/* silently drop message if we are not connected */
|
||
if (IS_ERR_OR_NULL(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) {
|
||
u16 svid = modep->svids[modep->svid_index];
|
||
response[0] = VDO(svid, 1, CMD_DISCOVER_MODES);
|
||
rlen = 1;
|
||
} else {
|
||
tcpm_register_partner_altmodes(port);
|
||
}
|
||
break;
|
||
case CMD_ENTER_MODE:
|
||
typec_altmode_update_active(pdev, true);
|
||
|
||
if (typec_altmode_vdm(adev, p[0], &p[1], cnt)) {
|
||
response[0] = VDO(adev->svid, 1, CMD_EXIT_MODE);
|
||
response[0] |= VDO_OPOS(adev->mode);
|
||
return 1;
|
||
}
|
||
return 0;
|
||
case CMD_EXIT_MODE:
|
||
typec_altmode_update_active(pdev, false);
|
||
|
||
/* Back to USB Operation */
|
||
WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
|
||
NULL));
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
case CMDT_RSP_NAK:
|
||
switch (cmd) {
|
||
case CMD_ENTER_MODE:
|
||
/* Back to USB Operation */
|
||
WARN_ON(typec_altmode_notify(adev, TYPEC_STATE_USB,
|
||
NULL));
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
/* Informing the alternate mode drivers about everything */
|
||
typec_altmode_vdm(adev, p[0], &p[1], cnt);
|
||
|
||
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 (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->negotiated_rev,
|
||
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);
|
||
}
|
||
|
||
enum pdo_err {
|
||
PDO_NO_ERR,
|
||
PDO_ERR_NO_VSAFE5V,
|
||
PDO_ERR_VSAFE5V_NOT_FIRST,
|
||
PDO_ERR_PDO_TYPE_NOT_IN_ORDER,
|
||
PDO_ERR_FIXED_NOT_SORTED,
|
||
PDO_ERR_VARIABLE_BATT_NOT_SORTED,
|
||
PDO_ERR_DUPE_PDO,
|
||
PDO_ERR_PPS_APDO_NOT_SORTED,
|
||
PDO_ERR_DUPE_PPS_APDO,
|
||
};
|
||
|
||
static const char * const pdo_err_msg[] = {
|
||
[PDO_ERR_NO_VSAFE5V] =
|
||
" err: source/sink caps should atleast have vSafe5V",
|
||
[PDO_ERR_VSAFE5V_NOT_FIRST] =
|
||
" err: vSafe5V Fixed Supply Object Shall always be the first object",
|
||
[PDO_ERR_PDO_TYPE_NOT_IN_ORDER] =
|
||
" err: PDOs should be in the following order: Fixed; Battery; Variable",
|
||
[PDO_ERR_FIXED_NOT_SORTED] =
|
||
" err: Fixed supply pdos should be in increasing order of their fixed voltage",
|
||
[PDO_ERR_VARIABLE_BATT_NOT_SORTED] =
|
||
" err: Variable/Battery supply pdos should be in increasing order of their minimum voltage",
|
||
[PDO_ERR_DUPE_PDO] =
|
||
" err: Variable/Batt supply pdos cannot have same min/max voltage",
|
||
[PDO_ERR_PPS_APDO_NOT_SORTED] =
|
||
" err: Programmable power supply apdos should be in increasing order of their maximum voltage",
|
||
[PDO_ERR_DUPE_PPS_APDO] =
|
||
" err: Programmable power supply apdos cannot have same min/max voltage and max current",
|
||
};
|
||
|
||
static enum pdo_err tcpm_caps_err(struct tcpm_port *port, const u32 *pdo,
|
||
unsigned int nr_pdo)
|
||
{
|
||
unsigned int i;
|
||
|
||
/* Should at least contain vSafe5v */
|
||
if (nr_pdo < 1)
|
||
return PDO_ERR_NO_VSAFE5V;
|
||
|
||
/* The vSafe5V Fixed Supply Object Shall always be the first object */
|
||
if (pdo_type(pdo[0]) != PDO_TYPE_FIXED ||
|
||
pdo_fixed_voltage(pdo[0]) != VSAFE5V)
|
||
return PDO_ERR_VSAFE5V_NOT_FIRST;
|
||
|
||
for (i = 1; i < nr_pdo; i++) {
|
||
if (pdo_type(pdo[i]) < pdo_type(pdo[i - 1])) {
|
||
return PDO_ERR_PDO_TYPE_NOT_IN_ORDER;
|
||
} else if (pdo_type(pdo[i]) == pdo_type(pdo[i - 1])) {
|
||
enum pd_pdo_type type = pdo_type(pdo[i]);
|
||
|
||
switch (type) {
|
||
/*
|
||
* The remaining Fixed Supply Objects, if
|
||
* present, shall be sent in voltage order;
|
||
* lowest to highest.
|
||
*/
|
||
case PDO_TYPE_FIXED:
|
||
if (pdo_fixed_voltage(pdo[i]) <=
|
||
pdo_fixed_voltage(pdo[i - 1]))
|
||
return PDO_ERR_FIXED_NOT_SORTED;
|
||
break;
|
||
/*
|
||
* The Battery Supply Objects and Variable
|
||
* supply, if present shall be sent in Minimum
|
||
* Voltage order; lowest to highest.
|
||
*/
|
||
case PDO_TYPE_VAR:
|
||
case PDO_TYPE_BATT:
|
||
if (pdo_min_voltage(pdo[i]) <
|
||
pdo_min_voltage(pdo[i - 1]))
|
||
return PDO_ERR_VARIABLE_BATT_NOT_SORTED;
|
||
else if ((pdo_min_voltage(pdo[i]) ==
|
||
pdo_min_voltage(pdo[i - 1])) &&
|
||
(pdo_max_voltage(pdo[i]) ==
|
||
pdo_min_voltage(pdo[i - 1])))
|
||
return PDO_ERR_DUPE_PDO;
|
||
break;
|
||
/*
|
||
* The Programmable Power Supply APDOs, if present,
|
||
* shall be sent in Maximum Voltage order;
|
||
* lowest to highest.
|
||
*/
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo[i]) != APDO_TYPE_PPS)
|
||
break;
|
||
|
||
if (pdo_pps_apdo_max_current(pdo[i]) <
|
||
pdo_pps_apdo_max_current(pdo[i - 1]))
|
||
return PDO_ERR_PPS_APDO_NOT_SORTED;
|
||
else if (pdo_pps_apdo_min_voltage(pdo[i]) ==
|
||
pdo_pps_apdo_min_voltage(pdo[i - 1]) &&
|
||
pdo_pps_apdo_max_voltage(pdo[i]) ==
|
||
pdo_pps_apdo_max_voltage(pdo[i - 1]) &&
|
||
pdo_pps_apdo_max_current(pdo[i]) ==
|
||
pdo_pps_apdo_max_current(pdo[i - 1]))
|
||
return PDO_ERR_DUPE_PPS_APDO;
|
||
break;
|
||
default:
|
||
tcpm_log_force(port, " Unknown pdo type");
|
||
}
|
||
}
|
||
}
|
||
|
||
return PDO_NO_ERR;
|
||
}
|
||
|
||
static int tcpm_validate_caps(struct tcpm_port *port, const u32 *pdo,
|
||
unsigned int nr_pdo)
|
||
{
|
||
enum pdo_err err_index = tcpm_caps_err(port, pdo, nr_pdo);
|
||
|
||
if (err_index != PDO_NO_ERR) {
|
||
tcpm_log_force(port, " %s", pdo_err_msg[err_index]);
|
||
return -EINVAL;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_altmode_enter(struct typec_altmode *altmode)
|
||
{
|
||
struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
|
||
u32 header;
|
||
|
||
mutex_lock(&port->lock);
|
||
header = VDO(altmode->svid, 1, CMD_ENTER_MODE);
|
||
header |= VDO_OPOS(altmode->mode);
|
||
|
||
tcpm_queue_vdm(port, header, NULL, 0);
|
||
mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
|
||
mutex_unlock(&port->lock);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_altmode_exit(struct typec_altmode *altmode)
|
||
{
|
||
struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
|
||
u32 header;
|
||
|
||
mutex_lock(&port->lock);
|
||
header = VDO(altmode->svid, 1, CMD_EXIT_MODE);
|
||
header |= VDO_OPOS(altmode->mode);
|
||
|
||
tcpm_queue_vdm(port, header, NULL, 0);
|
||
mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
|
||
mutex_unlock(&port->lock);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_altmode_vdm(struct typec_altmode *altmode,
|
||
u32 header, const u32 *data, int count)
|
||
{
|
||
struct tcpm_port *port = typec_altmode_get_drvdata(altmode);
|
||
|
||
mutex_lock(&port->lock);
|
||
tcpm_queue_vdm(port, header, data, count - 1);
|
||
mod_delayed_work(port->wq, &port->vdm_state_machine, 0);
|
||
mutex_unlock(&port->lock);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static const struct typec_altmode_ops tcpm_altmode_ops = {
|
||
.enter = tcpm_altmode_enter,
|
||
.exit = tcpm_altmode_exit,
|
||
.vdm = tcpm_altmode_vdm,
|
||
};
|
||
|
||
/*
|
||
* PD (data, control) command handling functions
|
||
*/
|
||
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 int tcpm_pd_send_control(struct tcpm_port *port,
|
||
enum pd_ctrl_msg_type type);
|
||
|
||
static void tcpm_handle_alert(struct tcpm_port *port, const __le32 *payload,
|
||
int cnt)
|
||
{
|
||
u32 p0 = le32_to_cpu(payload[0]);
|
||
unsigned int type = usb_pd_ado_type(p0);
|
||
|
||
if (!type) {
|
||
tcpm_log(port, "Alert message received with no type");
|
||
return;
|
||
}
|
||
|
||
/* Just handling non-battery alerts for now */
|
||
if (!(type & USB_PD_ADO_TYPE_BATT_STATUS_CHANGE)) {
|
||
switch (port->state) {
|
||
case SRC_READY:
|
||
case SNK_READY:
|
||
tcpm_set_state(port, GET_STATUS_SEND, 0);
|
||
break;
|
||
default:
|
||
tcpm_queue_message(port, PD_MSG_CTRL_WAIT);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
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 rev = pd_header_rev_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);
|
||
|
||
tcpm_validate_caps(port, port->source_caps,
|
||
port->nr_source_caps);
|
||
|
||
/*
|
||
* Adjust revision in subsequent message headers, as required,
|
||
* to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
|
||
* support Rev 1.0 so just do nothing in that scenario.
|
||
*/
|
||
if (rev == PD_REV10)
|
||
break;
|
||
|
||
if (rev < PD_MAX_REV)
|
||
port->negotiated_rev = rev;
|
||
|
||
/*
|
||
* 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;
|
||
}
|
||
|
||
/*
|
||
* Adjust revision in subsequent message headers, as required,
|
||
* to comply with 6.2.1.1.5 of the USB PD 3.0 spec. We don't
|
||
* support Rev 1.0 so just reject in that scenario.
|
||
*/
|
||
if (rev == PD_REV10) {
|
||
tcpm_queue_message(port, PD_MSG_CTRL_REJECT);
|
||
break;
|
||
}
|
||
|
||
if (rev < PD_MAX_REV)
|
||
port->negotiated_rev = rev;
|
||
|
||
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;
|
||
case PD_DATA_ALERT:
|
||
tcpm_handle_alert(port, msg->payload, cnt);
|
||
break;
|
||
case PD_DATA_BATT_STATUS:
|
||
case PD_DATA_GET_COUNTRY_INFO:
|
||
/* Currently unsupported */
|
||
tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Unhandled data message type %#x", type);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void tcpm_pps_complete(struct tcpm_port *port, int result)
|
||
{
|
||
if (port->pps_pending) {
|
||
port->pps_status = result;
|
||
port->pps_pending = false;
|
||
complete(&port->pps_complete);
|
||
}
|
||
}
|
||
|
||
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);
|
||
port->explicit_contract = true;
|
||
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_CC_DEBOUNCED:
|
||
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:
|
||
case PD_CTRL_NOT_SUPP:
|
||
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 SNK_NEGOTIATE_PPS_CAPABILITIES:
|
||
/* Revert data back from any requested PPS updates */
|
||
port->pps_data.out_volt = port->supply_voltage;
|
||
port->pps_data.op_curr = port->current_limit;
|
||
port->pps_status = (type == PD_CTRL_WAIT ?
|
||
-EAGAIN : -EOPNOTSUPP);
|
||
tcpm_set_state(port, SNK_READY, 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:
|
||
port->pps_data.active = false;
|
||
tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
|
||
break;
|
||
case SNK_NEGOTIATE_PPS_CAPABILITIES:
|
||
port->pps_data.active = true;
|
||
port->supply_voltage = port->pps_data.out_volt;
|
||
port->current_limit = port->pps_data.op_curr;
|
||
tcpm_set_state(port, SNK_TRANSITION_SINK, 0);
|
||
break;
|
||
case SOFT_RESET_SEND:
|
||
port->message_id = 0;
|
||
port->rx_msgid = -1;
|
||
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->port_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->port_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;
|
||
case PD_CTRL_GET_SOURCE_CAP_EXT:
|
||
case PD_CTRL_GET_STATUS:
|
||
case PD_CTRL_FR_SWAP:
|
||
case PD_CTRL_GET_PPS_STATUS:
|
||
case PD_CTRL_GET_COUNTRY_CODES:
|
||
/* Currently not supported */
|
||
tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Unhandled ctrl message type %#x", type);
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void tcpm_pd_ext_msg_request(struct tcpm_port *port,
|
||
const struct pd_message *msg)
|
||
{
|
||
enum pd_ext_msg_type type = pd_header_type_le(msg->header);
|
||
unsigned int data_size = pd_ext_header_data_size_le(msg->ext_msg.header);
|
||
|
||
if (!(msg->ext_msg.header & PD_EXT_HDR_CHUNKED)) {
|
||
tcpm_log(port, "Unchunked extended messages unsupported");
|
||
return;
|
||
}
|
||
|
||
if (data_size > PD_EXT_MAX_CHUNK_DATA) {
|
||
tcpm_log(port, "Chunk handling not yet supported");
|
||
return;
|
||
}
|
||
|
||
switch (type) {
|
||
case PD_EXT_STATUS:
|
||
/*
|
||
* If PPS related events raised then get PPS status to clear
|
||
* (see USB PD 3.0 Spec, 6.5.2.4)
|
||
*/
|
||
if (msg->ext_msg.data[USB_PD_EXT_SDB_EVENT_FLAGS] &
|
||
USB_PD_EXT_SDB_PPS_EVENTS)
|
||
tcpm_set_state(port, GET_PPS_STATUS_SEND, 0);
|
||
else
|
||
tcpm_set_state(port, ready_state(port), 0);
|
||
break;
|
||
case PD_EXT_PPS_STATUS:
|
||
/*
|
||
* For now the PPS status message is used to clear events
|
||
* and nothing more.
|
||
*/
|
||
tcpm_set_state(port, ready_state(port), 0);
|
||
break;
|
||
case PD_EXT_SOURCE_CAP_EXT:
|
||
case PD_EXT_GET_BATT_CAP:
|
||
case PD_EXT_GET_BATT_STATUS:
|
||
case PD_EXT_BATT_CAP:
|
||
case PD_EXT_GET_MANUFACTURER_INFO:
|
||
case PD_EXT_MANUFACTURER_INFO:
|
||
case PD_EXT_SECURITY_REQUEST:
|
||
case PD_EXT_SECURITY_RESPONSE:
|
||
case PD_EXT_FW_UPDATE_REQUEST:
|
||
case PD_EXT_FW_UPDATE_RESPONSE:
|
||
case PD_EXT_COUNTRY_INFO:
|
||
case PD_EXT_COUNTRY_CODES:
|
||
tcpm_queue_message(port, PD_MSG_CTRL_NOT_SUPP);
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Unhandled extended 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) {
|
||
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;
|
||
|
||
/*
|
||
* 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 (msg->header & PD_HEADER_EXT_HDR)
|
||
tcpm_pd_ext_msg_request(port, msg);
|
||
else if (cnt)
|
||
tcpm_pd_data_request(port, msg);
|
||
else
|
||
tcpm_pd_ctrl_request(port, msg);
|
||
}
|
||
}
|
||
|
||
done:
|
||
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->negotiated_rev,
|
||
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_CTRL_NOT_SUPP:
|
||
tcpm_pd_send_control(port, PD_CTRL_NOT_SUPP);
|
||
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;
|
||
}
|
||
|
||
#define min_power(x, y) min(pdo_max_power(x), pdo_max_power(y))
|
||
#define min_current(x, y) min(pdo_max_current(x), pdo_max_current(y))
|
||
|
||
static int tcpm_pd_select_pdo(struct tcpm_port *port, int *sink_pdo,
|
||
int *src_pdo)
|
||
{
|
||
unsigned int i, j, max_src_mv = 0, min_src_mv = 0, max_mw = 0,
|
||
max_mv = 0, src_mw = 0, src_ma = 0, max_snk_mv = 0,
|
||
min_snk_mv = 0;
|
||
int ret = -EINVAL;
|
||
|
||
port->pps_data.supported = false;
|
||
port->usb_type = POWER_SUPPLY_USB_TYPE_PD;
|
||
|
||
/*
|
||
* Select the source PDO providing the most power which has a
|
||
* matchig sink cap.
|
||
*/
|
||
for (i = 0; i < port->nr_source_caps; i++) {
|
||
u32 pdo = port->source_caps[i];
|
||
enum pd_pdo_type type = pdo_type(pdo);
|
||
|
||
switch (type) {
|
||
case PDO_TYPE_FIXED:
|
||
max_src_mv = pdo_fixed_voltage(pdo);
|
||
min_src_mv = max_src_mv;
|
||
break;
|
||
case PDO_TYPE_BATT:
|
||
case PDO_TYPE_VAR:
|
||
max_src_mv = pdo_max_voltage(pdo);
|
||
min_src_mv = pdo_min_voltage(pdo);
|
||
break;
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo) == APDO_TYPE_PPS) {
|
||
port->pps_data.supported = true;
|
||
port->usb_type =
|
||
POWER_SUPPLY_USB_TYPE_PD_PPS;
|
||
}
|
||
continue;
|
||
default:
|
||
tcpm_log(port, "Invalid source PDO type, ignoring");
|
||
continue;
|
||
}
|
||
|
||
switch (type) {
|
||
case PDO_TYPE_FIXED:
|
||
case PDO_TYPE_VAR:
|
||
src_ma = pdo_max_current(pdo);
|
||
src_mw = src_ma * min_src_mv / 1000;
|
||
break;
|
||
case PDO_TYPE_BATT:
|
||
src_mw = pdo_max_power(pdo);
|
||
break;
|
||
case PDO_TYPE_APDO:
|
||
continue;
|
||
default:
|
||
tcpm_log(port, "Invalid source PDO type, ignoring");
|
||
continue;
|
||
}
|
||
|
||
for (j = 0; j < port->nr_snk_pdo; j++) {
|
||
pdo = port->snk_pdo[j];
|
||
|
||
switch (pdo_type(pdo)) {
|
||
case PDO_TYPE_FIXED:
|
||
max_snk_mv = pdo_fixed_voltage(pdo);
|
||
min_snk_mv = max_snk_mv;
|
||
break;
|
||
case PDO_TYPE_BATT:
|
||
case PDO_TYPE_VAR:
|
||
max_snk_mv = pdo_max_voltage(pdo);
|
||
min_snk_mv = pdo_min_voltage(pdo);
|
||
break;
|
||
case PDO_TYPE_APDO:
|
||
continue;
|
||
default:
|
||
tcpm_log(port, "Invalid sink PDO type, ignoring");
|
||
continue;
|
||
}
|
||
|
||
if (max_src_mv <= max_snk_mv &&
|
||
min_src_mv >= min_snk_mv) {
|
||
/* Prefer higher voltages if available */
|
||
if ((src_mw == max_mw && min_src_mv > max_mv) ||
|
||
src_mw > max_mw) {
|
||
*src_pdo = i;
|
||
*sink_pdo = j;
|
||
max_mw = src_mw;
|
||
max_mv = min_src_mv;
|
||
ret = 0;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
#define min_pps_apdo_current(x, y) \
|
||
min(pdo_pps_apdo_max_current(x), pdo_pps_apdo_max_current(y))
|
||
|
||
static unsigned int tcpm_pd_select_pps_apdo(struct tcpm_port *port)
|
||
{
|
||
unsigned int i, j, max_mw = 0, max_mv = 0;
|
||
unsigned int min_src_mv, max_src_mv, src_ma, src_mw;
|
||
unsigned int min_snk_mv, max_snk_mv, snk_ma;
|
||
u32 pdo;
|
||
unsigned int src_pdo = 0, snk_pdo = 0;
|
||
|
||
/*
|
||
* Select the source PPS APDO providing the most power while staying
|
||
* within the board's limits. We skip the first PDO as this is always
|
||
* 5V 3A.
|
||
*/
|
||
for (i = 1; i < port->nr_source_caps; ++i) {
|
||
pdo = port->source_caps[i];
|
||
|
||
switch (pdo_type(pdo)) {
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
|
||
tcpm_log(port, "Not PPS APDO (source), ignoring");
|
||
continue;
|
||
}
|
||
|
||
min_src_mv = pdo_pps_apdo_min_voltage(pdo);
|
||
max_src_mv = pdo_pps_apdo_max_voltage(pdo);
|
||
src_ma = pdo_pps_apdo_max_current(pdo);
|
||
src_mw = (src_ma * max_src_mv) / 1000;
|
||
|
||
/*
|
||
* Now search through the sink PDOs to find a matching
|
||
* PPS APDO. Again skip the first sink PDO as this will
|
||
* always be 5V 3A.
|
||
*/
|
||
for (j = 1; j < port->nr_snk_pdo; j++) {
|
||
pdo = port->snk_pdo[j];
|
||
|
||
switch (pdo_type(pdo)) {
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
|
||
tcpm_log(port,
|
||
"Not PPS APDO (sink), ignoring");
|
||
continue;
|
||
}
|
||
|
||
min_snk_mv =
|
||
pdo_pps_apdo_min_voltage(pdo);
|
||
max_snk_mv =
|
||
pdo_pps_apdo_max_voltage(pdo);
|
||
snk_ma =
|
||
pdo_pps_apdo_max_current(pdo);
|
||
break;
|
||
default:
|
||
tcpm_log(port,
|
||
"Not APDO type (sink), ignoring");
|
||
continue;
|
||
}
|
||
|
||
if (max_src_mv <= max_snk_mv &&
|
||
min_src_mv >= min_snk_mv) {
|
||
/* Prefer higher voltages if available */
|
||
if ((src_mw == max_mw &&
|
||
min_src_mv > max_mv) ||
|
||
src_mw > max_mw) {
|
||
src_pdo = i;
|
||
snk_pdo = j;
|
||
max_mw = src_mw;
|
||
max_mv = max_src_mv;
|
||
}
|
||
}
|
||
}
|
||
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Not APDO type (source), ignoring");
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (src_pdo) {
|
||
pdo = port->source_caps[src_pdo];
|
||
|
||
port->pps_data.min_volt = pdo_pps_apdo_min_voltage(pdo);
|
||
port->pps_data.max_volt = pdo_pps_apdo_max_voltage(pdo);
|
||
port->pps_data.max_curr =
|
||
min_pps_apdo_current(pdo, port->snk_pdo[snk_pdo]);
|
||
port->pps_data.out_volt =
|
||
min(pdo_pps_apdo_max_voltage(pdo), port->pps_data.out_volt);
|
||
port->pps_data.op_curr =
|
||
min(port->pps_data.max_curr, port->pps_data.op_curr);
|
||
}
|
||
|
||
return src_pdo;
|
||
}
|
||
|
||
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;
|
||
u32 pdo, matching_snk_pdo;
|
||
int src_pdo_index = 0;
|
||
int snk_pdo_index = 0;
|
||
int ret;
|
||
|
||
ret = tcpm_pd_select_pdo(port, &snk_pdo_index, &src_pdo_index);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
pdo = port->source_caps[src_pdo_index];
|
||
matching_snk_pdo = port->snk_pdo[snk_pdo_index];
|
||
type = pdo_type(pdo);
|
||
|
||
switch (type) {
|
||
case PDO_TYPE_FIXED:
|
||
mv = pdo_fixed_voltage(pdo);
|
||
break;
|
||
case PDO_TYPE_BATT:
|
||
case PDO_TYPE_VAR:
|
||
mv = pdo_min_voltage(pdo);
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Invalid PDO selected!");
|
||
return -EINVAL;
|
||
}
|
||
|
||
/* Select maximum available current within the sink pdo's limit */
|
||
if (type == PDO_TYPE_BATT) {
|
||
mw = min_power(pdo, matching_snk_pdo);
|
||
ma = 1000 * mw / mv;
|
||
} else {
|
||
ma = min_current(pdo, matching_snk_pdo);
|
||
mw = ma * mv / 1000;
|
||
}
|
||
|
||
flags = RDO_USB_COMM | RDO_NO_SUSPEND;
|
||
|
||
/* Set mismatch bit if offered power is less than operating power */
|
||
max_ma = ma;
|
||
max_mw = mw;
|
||
if (mw < port->operating_snk_mw) {
|
||
flags |= RDO_CAP_MISMATCH;
|
||
if (type == PDO_TYPE_BATT &&
|
||
(pdo_max_power(matching_snk_pdo) > pdo_max_power(pdo)))
|
||
max_mw = pdo_max_power(matching_snk_pdo);
|
||
else if (pdo_max_current(matching_snk_pdo) >
|
||
pdo_max_current(pdo))
|
||
max_ma = pdo_max_current(matching_snk_pdo);
|
||
}
|
||
|
||
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(src_pdo_index + 1, mw, max_mw, flags);
|
||
|
||
tcpm_log(port, "Requesting PDO %d: %u mV, %u mW%s",
|
||
src_pdo_index, mv, mw,
|
||
flags & RDO_CAP_MISMATCH ? " [mismatch]" : "");
|
||
} else {
|
||
*rdo = RDO_FIXED(src_pdo_index + 1, ma, max_ma, flags);
|
||
|
||
tcpm_log(port, "Requesting PDO %d: %u mV, %u mA%s",
|
||
src_pdo_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->negotiated_rev,
|
||
port->message_id, 1);
|
||
msg.payload[0] = cpu_to_le32(rdo);
|
||
|
||
return tcpm_pd_transmit(port, TCPC_TX_SOP, &msg);
|
||
}
|
||
|
||
static int tcpm_pd_build_pps_request(struct tcpm_port *port, u32 *rdo)
|
||
{
|
||
unsigned int out_mv, op_ma, op_mw, min_mv, max_mv, max_ma, flags;
|
||
enum pd_pdo_type type;
|
||
unsigned int src_pdo_index;
|
||
u32 pdo;
|
||
|
||
src_pdo_index = tcpm_pd_select_pps_apdo(port);
|
||
if (!src_pdo_index)
|
||
return -EOPNOTSUPP;
|
||
|
||
pdo = port->source_caps[src_pdo_index];
|
||
type = pdo_type(pdo);
|
||
|
||
switch (type) {
|
||
case PDO_TYPE_APDO:
|
||
if (pdo_apdo_type(pdo) != APDO_TYPE_PPS) {
|
||
tcpm_log(port, "Invalid APDO selected!");
|
||
return -EINVAL;
|
||
}
|
||
min_mv = port->pps_data.min_volt;
|
||
max_mv = port->pps_data.max_volt;
|
||
max_ma = port->pps_data.max_curr;
|
||
out_mv = port->pps_data.out_volt;
|
||
op_ma = port->pps_data.op_curr;
|
||
break;
|
||
default:
|
||
tcpm_log(port, "Invalid PDO selected!");
|
||
return -EINVAL;
|
||
}
|
||
|
||
flags = RDO_USB_COMM | RDO_NO_SUSPEND;
|
||
|
||
op_mw = (op_ma * out_mv) / 1000;
|
||
if (op_mw < port->operating_snk_mw) {
|
||
/*
|
||
* Try raising current to meet power needs. If that's not enough
|
||
* then try upping the voltage. If that's still not enough
|
||
* then we've obviously chosen a PPS APDO which really isn't
|
||
* suitable so abandon ship.
|
||
*/
|
||
op_ma = (port->operating_snk_mw * 1000) / out_mv;
|
||
if ((port->operating_snk_mw * 1000) % out_mv)
|
||
++op_ma;
|
||
op_ma += RDO_PROG_CURR_MA_STEP - (op_ma % RDO_PROG_CURR_MA_STEP);
|
||
|
||
if (op_ma > max_ma) {
|
||
op_ma = max_ma;
|
||
out_mv = (port->operating_snk_mw * 1000) / op_ma;
|
||
if ((port->operating_snk_mw * 1000) % op_ma)
|
||
++out_mv;
|
||
out_mv += RDO_PROG_VOLT_MV_STEP -
|
||
(out_mv % RDO_PROG_VOLT_MV_STEP);
|
||
|
||
if (out_mv > max_mv) {
|
||
tcpm_log(port, "Invalid PPS APDO selected!");
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
}
|
||
|
||
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);
|
||
|
||
*rdo = RDO_PROG(src_pdo_index + 1, out_mv, op_ma, flags);
|
||
|
||
tcpm_log(port, "Requesting APDO %d: %u mV, %u mA",
|
||
src_pdo_index, out_mv, op_ma);
|
||
|
||
port->pps_data.op_curr = op_ma;
|
||
port->pps_data.out_volt = out_mv;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_pd_send_pps_request(struct tcpm_port *port)
|
||
{
|
||
struct pd_message msg;
|
||
int ret;
|
||
u32 rdo;
|
||
|
||
ret = tcpm_pd_build_pps_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->negotiated_rev,
|
||
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,
|
||
enum typec_cc_status cc)
|
||
{
|
||
int ret;
|
||
|
||
if (port->tcpc->start_drp_toggling &&
|
||
port->port_type == TYPEC_PORT_DRP) {
|
||
tcpm_log_force(port, "Start DRP toggling");
|
||
ret = port->tcpc->start_drp_toggling(port->tcpc, cc);
|
||
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_STATE_SAFE, USB_ROLE_NONE,
|
||
TYPEC_ORIENTATION_NONE);
|
||
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;
|
||
port->pps_data.supported = false;
|
||
|
||
/*
|
||
* 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;
|
||
|
||
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_mux_set(port, TYPEC_STATE_SAFE, USB_ROLE_NONE,
|
||
TYPEC_ORIENTATION_NONE);
|
||
tcpm_set_attached_state(port, false);
|
||
port->try_src_count = 0;
|
||
port->try_snk_count = 0;
|
||
port->usb_type = POWER_SUPPLY_USB_TYPE_C;
|
||
|
||
power_supply_changed(port->psy);
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
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 unattached_state(struct tcpm_port *port)
|
||
{
|
||
if (port->port_type == TYPEC_PORT_DRP) {
|
||
if (port->pwr_role == TYPEC_SOURCE)
|
||
return SRC_UNATTACHED;
|
||
else
|
||
return SNK_UNATTACHED;
|
||
} else if (port->port_type == TYPEC_PORT_SRC) {
|
||
return SRC_UNATTACHED;
|
||
}
|
||
|
||
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;
|
||
port->non_pd_role_swap = false;
|
||
complete(&port->swap_complete);
|
||
}
|
||
}
|
||
|
||
static enum typec_pwr_opmode tcpm_get_pwr_opmode(enum typec_cc_status cc)
|
||
{
|
||
switch (cc) {
|
||
case TYPEC_CC_RP_1_5:
|
||
return TYPEC_PWR_MODE_1_5A;
|
||
case TYPEC_CC_RP_3_0:
|
||
return TYPEC_PWR_MODE_3_0A;
|
||
case TYPEC_CC_RP_DEF:
|
||
default:
|
||
return TYPEC_PWR_MODE_USB;
|
||
}
|
||
}
|
||
|
||
static void run_state_machine(struct tcpm_port *port)
|
||
{
|
||
int ret;
|
||
enum typec_pwr_opmode opmode;
|
||
unsigned int msecs;
|
||
|
||
port->enter_state = port->state;
|
||
switch (port->state) {
|
||
case DRP_TOGGLING:
|
||
break;
|
||
/* SRC states */
|
||
case SRC_UNATTACHED:
|
||
if (!port->non_pd_role_swap)
|
||
tcpm_swap_complete(port, -ENOTCONN);
|
||
tcpm_src_detach(port);
|
||
if (tcpm_start_drp_toggling(port, tcpm_rp_cc(port))) {
|
||
tcpm_set_state(port, DRP_TOGGLING, 0);
|
||
break;
|
||
}
|
||
tcpm_set_cc(port, tcpm_rp_cc(port));
|
||
if (port->port_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 (tcpm_port_is_sink(port)) {
|
||
tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE, 0);
|
||
} else {
|
||
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
||
port->max_wait = 0;
|
||
}
|
||
break;
|
||
case SNK_TRY_WAIT_DEBOUNCE:
|
||
tcpm_set_state(port, SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS,
|
||
PD_T_PD_DEBOUNCE);
|
||
break;
|
||
case SNK_TRY_WAIT_DEBOUNCE_CHECK_VBUS:
|
||
if (port->vbus_present && tcpm_port_is_sink(port)) {
|
||
tcpm_set_state(port, SNK_ATTACHED, 0);
|
||
} else {
|
||
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
||
port->max_wait = 0;
|
||
}
|
||
break;
|
||
case SRC_TRYWAIT:
|
||
tcpm_set_cc(port, tcpm_rp_cc(port));
|
||
if (port->max_wait == 0) {
|
||
port->max_wait = jiffies +
|
||
msecs_to_jiffies(PD_T_DRP_TRY);
|
||
tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
|
||
PD_T_DRP_TRY);
|
||
} else {
|
||
if (time_is_after_jiffies(port->max_wait))
|
||
tcpm_set_state(port, SRC_TRYWAIT_UNATTACHED,
|
||
jiffies_to_msecs(port->max_wait -
|
||
jiffies));
|
||
else
|
||
tcpm_set_state(port, SNK_UNATTACHED, 0);
|
||
}
|
||
break;
|
||
case SRC_TRYWAIT_DEBOUNCE:
|
||
tcpm_set_state(port, SRC_ATTACHED, PD_T_CC_DEBOUNCE);
|
||
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:
|
||
opmode = tcpm_get_pwr_opmode(tcpm_rp_cc(port));
|
||
typec_set_pwr_opmode(port->typec_port, opmode);
|
||
port->pwr_opmode = TYPEC_PWR_MODE_USB;
|
||
port->caps_count = 0;
|
||
port->negotiated_rev = PD_MAX_REV;
|
||
port->message_id = 0;
|
||
port->rx_msgid = -1;
|
||
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_swap_complete(port, 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
|
||
*
|
||
* There is no actual need to send PD messages since the local
|
||
* port type-c and the spec does not clearly say whether PD is
|
||
* possible when type-c is connected to Type-A/B
|
||
*/
|
||
break;
|
||
case SRC_WAIT_NEW_CAPABILITIES:
|
||
/* Nothing to do... */
|
||
break;
|
||
|
||
/* SNK states */
|
||
case SNK_UNATTACHED:
|
||
if (!port->non_pd_role_swap)
|
||
tcpm_swap_complete(port, -ENOTCONN);
|
||
tcpm_pps_complete(port, -ENOTCONN);
|
||
tcpm_snk_detach(port);
|
||
if (tcpm_start_drp_toggling(port, TYPEC_CC_RD)) {
|
||
tcpm_set_state(port, DRP_TOGGLING, 0);
|
||
break;
|
||
}
|
||
tcpm_set_cc(port, TYPEC_CC_RD);
|
||
if (port->port_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, PORT_RESET, PD_T_PS_SOURCE_ON);
|
||
break;
|
||
|
||
case SRC_TRY:
|
||
port->try_src_count++;
|
||
tcpm_set_cc(port, tcpm_rp_cc(port));
|
||
port->max_wait = 0;
|
||
tcpm_set_state(port, SRC_TRY_WAIT, 0);
|
||
break;
|
||
case SRC_TRY_WAIT:
|
||
if (port->max_wait == 0) {
|
||
port->max_wait = jiffies +
|
||
msecs_to_jiffies(PD_T_DRP_TRY);
|
||
msecs = PD_T_DRP_TRY;
|
||
} else {
|
||
if (time_is_after_jiffies(port->max_wait))
|
||
msecs = jiffies_to_msecs(port->max_wait -
|
||
jiffies);
|
||
else
|
||
msecs = 0;
|
||
}
|
||
tcpm_set_state(port, SNK_TRYWAIT, msecs);
|
||
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_VBUS, PD_T_CC_DEBOUNCE);
|
||
break;
|
||
case SNK_TRYWAIT_VBUS:
|
||
/*
|
||
* TCPM stays in this state indefinitely until VBUS
|
||
* is detected as long as Rp is not detected for
|
||
* more than a time period of tPDDebounce.
|
||
*/
|
||
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, SNK_TRYWAIT_DEBOUNCE, 0);
|
||
break;
|
||
case SNK_TRYWAIT_DEBOUNCE:
|
||
tcpm_set_state(port, SNK_UNATTACHED, PD_T_PD_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:
|
||
opmode = tcpm_get_pwr_opmode(port->polarity ?
|
||
port->cc2 : port->cc1);
|
||
typec_set_pwr_opmode(port->typec_port, opmode);
|
||
port->pwr_opmode = TYPEC_PWR_MODE_USB;
|
||
port->negotiated_rev = PD_MAX_REV;
|
||
port->message_id = 0;
|
||
port->rx_msgid = -1;
|
||
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->port_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,
|
||
jiffies_to_msecs(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_NEGOTIATE_PPS_CAPABILITIES:
|
||
ret = tcpm_pd_send_pps_request(port);
|
||
if (ret < 0) {
|
||
port->pps_status = ret;
|
||
/*
|
||
* If this was called due to updates to sink
|
||
* capabilities, and pps is no longer valid, we should
|
||
* safely fall back to a standard PDO.
|
||
*/
|
||
if (port->update_sink_caps)
|
||
tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
|
||
else
|
||
tcpm_set_state(port, SNK_READY, 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->update_sink_caps = false;
|
||
if (port->explicit_contract) {
|
||
typec_set_pwr_opmode(port->typec_port,
|
||
TYPEC_PWR_MODE_PD);
|
||
port->pwr_opmode = TYPEC_PWR_MODE_PD;
|
||
}
|
||
|
||
tcpm_swap_complete(port, 0);
|
||
tcpm_typec_connect(port);
|
||
tcpm_check_send_discover(port);
|
||
tcpm_pps_complete(port, port->pps_status);
|
||
|
||
power_supply_changed(port->psy);
|
||
|
||
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:
|
||
memset(&port->pps_data, 0, sizeof(port->pps_data));
|
||
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;
|
||
port->rx_msgid = -1;
|
||
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;
|
||
port->rx_msgid = -1;
|
||
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_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;
|
||
/* allow time for Vbus discharge, must be < tSrcSwapStdby */
|
||
tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF,
|
||
PD_T_SRCSWAPSTDBY);
|
||
break;
|
||
case PR_SWAP_SRC_SNK_SOURCE_OFF:
|
||
tcpm_set_cc(port, TYPEC_CC_RD);
|
||
/* allow CC debounce */
|
||
tcpm_set_state(port, PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED,
|
||
PD_T_CC_DEBOUNCE);
|
||
break;
|
||
case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
|
||
/*
|
||
* 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);
|
||
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_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);
|
||
/*
|
||
* allow time VBUS ramp-up, must be < tNewSrc
|
||
* Also, this window overlaps with CC debounce as well.
|
||
* So, Wait for the max of two which is PD_T_NEWSRC
|
||
*/
|
||
tcpm_set_state(port, PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP,
|
||
PD_T_NEWSRC);
|
||
break;
|
||
case PR_SWAP_SNK_SRC_SOURCE_ON_VBUS_RAMPED_UP:
|
||
/*
|
||
* 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."
|
||
*/
|
||
tcpm_set_pwr_role(port, TYPEC_SOURCE);
|
||
tcpm_pd_send_control(port, PD_CTRL_PS_RDY);
|
||
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_set_state(port, ready_state(port), 0);
|
||
break;
|
||
case VCONN_SWAP_TURN_OFF_VCONN:
|
||
tcpm_set_vconn(port, false);
|
||
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 GET_STATUS_SEND:
|
||
tcpm_pd_send_control(port, PD_CTRL_GET_STATUS);
|
||
tcpm_set_state(port, GET_STATUS_SEND_TIMEOUT,
|
||
PD_T_SENDER_RESPONSE);
|
||
break;
|
||
case GET_STATUS_SEND_TIMEOUT:
|
||
tcpm_set_state(port, ready_state(port), 0);
|
||
break;
|
||
case GET_PPS_STATUS_SEND:
|
||
tcpm_pd_send_control(port, PD_CTRL_GET_PPS_STATUS);
|
||
tcpm_set_state(port, GET_PPS_STATUS_SEND_TIMEOUT,
|
||
PD_T_SENDER_RESPONSE);
|
||
break;
|
||
case GET_PPS_STATUS_SEND_TIMEOUT:
|
||
tcpm_set_state(port, ready_state(port), 0);
|
||
break;
|
||
case ERROR_RECOVERY:
|
||
tcpm_swap_complete(port, -EPROTO);
|
||
tcpm_pps_complete(port, -EPROTO);
|
||
tcpm_set_state(port, PORT_RESET, 0);
|
||
break;
|
||
case PORT_RESET:
|
||
tcpm_reset_port(port);
|
||
tcpm_set_cc(port, TYPEC_CC_OPEN);
|
||
tcpm_set_state(port, PORT_RESET_WAIT_OFF,
|
||
PD_T_ERROR_RECOVERY);
|
||
break;
|
||
case PORT_RESET_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:
|
||
case SRC_SEND_CAPABILITIES:
|
||
case SRC_READY:
|
||
if (tcpm_port_is_disconnected(port) ||
|
||
!tcpm_port_is_source(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))
|
||
tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
|
||
break;
|
||
case SRC_TRYWAIT_DEBOUNCE:
|
||
if (port->vbus_present || !tcpm_port_is_source(port))
|
||
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
||
break;
|
||
case SNK_TRY_WAIT_DEBOUNCE:
|
||
if (!tcpm_port_is_sink(port)) {
|
||
port->max_wait = 0;
|
||
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
||
}
|
||
break;
|
||
case SRC_TRY_WAIT:
|
||
if (tcpm_port_is_source(port))
|
||
tcpm_set_state(port, SRC_TRY_DEBOUNCE, 0);
|
||
break;
|
||
case SRC_TRY_DEBOUNCE:
|
||
tcpm_set_state(port, SRC_TRY_WAIT, 0);
|
||
break;
|
||
case SNK_TRYWAIT_DEBOUNCE:
|
||
if (tcpm_port_is_sink(port))
|
||
tcpm_set_state(port, SNK_TRYWAIT_VBUS, 0);
|
||
break;
|
||
case SNK_TRYWAIT_VBUS:
|
||
if (!tcpm_port_is_sink(port))
|
||
tcpm_set_state(port, SNK_TRYWAIT_DEBOUNCE, 0);
|
||
break;
|
||
case SNK_TRYWAIT:
|
||
/* Do nothing, waiting for tCCDebounce */
|
||
break;
|
||
case PR_SWAP_SNK_SRC_SINK_OFF:
|
||
case PR_SWAP_SRC_SNK_TRANSITION_OFF:
|
||
case PR_SWAP_SRC_SNK_SOURCE_OFF:
|
||
case PR_SWAP_SRC_SNK_SOURCE_OFF_CC_DEBOUNCED:
|
||
case PR_SWAP_SNK_SRC_SOURCE_ON:
|
||
/*
|
||
* CC state change is expected in PR_SWAP
|
||
* 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)
|
||
{
|
||
tcpm_log_force(port, "VBUS on");
|
||
port->vbus_present = true;
|
||
switch (port->state) {
|
||
case SNK_TRANSITION_SINK_VBUS:
|
||
port->explicit_contract = true;
|
||
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:
|
||
/* Do nothing, Waiting for Rd to be detected */
|
||
break;
|
||
case SRC_TRYWAIT_DEBOUNCE:
|
||
tcpm_set_state(port, SRC_TRYWAIT, 0);
|
||
break;
|
||
case SNK_TRY_WAIT_DEBOUNCE:
|
||
/* Do nothing, waiting for PD_DEBOUNCE to do be done */
|
||
break;
|
||
case SNK_TRYWAIT:
|
||
/* Do nothing, waiting for tCCDebounce */
|
||
break;
|
||
case SNK_TRYWAIT_VBUS:
|
||
if (tcpm_port_is_sink(port))
|
||
tcpm_set_state(port, SNK_ATTACHED, 0);
|
||
break;
|
||
case SNK_TRYWAIT_DEBOUNCE:
|
||
/* Do nothing, waiting for Rp */
|
||
break;
|
||
case SRC_TRY_WAIT:
|
||
case SRC_TRY_DEBOUNCE:
|
||
/* Do nothing, waiting for sink detection */
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
static void _tcpm_pd_vbus_off(struct tcpm_port *port)
|
||
{
|
||
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))
|
||
tcpm_set_state(port, SRC_TRYWAIT_DEBOUNCE, 0);
|
||
break;
|
||
case SNK_TRY_WAIT_DEBOUNCE:
|
||
/* Do nothing, waiting for PD_DEBOUNCE to do be done */
|
||
break;
|
||
case SNK_TRYWAIT:
|
||
case SNK_TRYWAIT_VBUS:
|
||
case SNK_TRYWAIT_DEBOUNCE:
|
||
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 PORT_RESET_WAIT_OFF:
|
||
tcpm_set_state(port, tcpm_default_state(port), 0);
|
||
break;
|
||
case SRC_TRY_WAIT:
|
||
case SRC_TRY_DEBOUNCE:
|
||
/* Do nothing, waiting for sink detection */
|
||
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->port_type != TYPEC_PORT_DRP) {
|
||
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.
|
||
*/
|
||
|
||
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;
|
||
}
|
||
port->non_pd_role_swap = true;
|
||
tcpm_set_state(port, PORT_RESET, 0);
|
||
} else {
|
||
tcpm_set_state(port, DR_SWAP_SEND, 0);
|
||
}
|
||
|
||
port->swap_status = 0;
|
||
port->swap_pending = true;
|
||
reinit_completion(&port->swap_complete);
|
||
mutex_unlock(&port->lock);
|
||
|
||
if (!wait_for_completion_timeout(&port->swap_complete,
|
||
msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
ret = port->swap_status;
|
||
|
||
port->non_pd_role_swap = false;
|
||
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->port_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;
|
||
}
|
||
|
||
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);
|
||
|
||
if (!wait_for_completion_timeout(&port->swap_complete,
|
||
msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
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);
|
||
|
||
if (!wait_for_completion_timeout(&port->swap_complete,
|
||
msecs_to_jiffies(PD_ROLE_SWAP_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
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 int tcpm_pps_set_op_curr(struct tcpm_port *port, u16 op_curr)
|
||
{
|
||
unsigned int target_mw;
|
||
int ret;
|
||
|
||
mutex_lock(&port->swap_lock);
|
||
mutex_lock(&port->lock);
|
||
|
||
if (!port->pps_data.active) {
|
||
ret = -EOPNOTSUPP;
|
||
goto port_unlock;
|
||
}
|
||
|
||
if (port->state != SNK_READY) {
|
||
ret = -EAGAIN;
|
||
goto port_unlock;
|
||
}
|
||
|
||
if (op_curr > port->pps_data.max_curr) {
|
||
ret = -EINVAL;
|
||
goto port_unlock;
|
||
}
|
||
|
||
target_mw = (op_curr * port->pps_data.out_volt) / 1000;
|
||
if (target_mw < port->operating_snk_mw) {
|
||
ret = -EINVAL;
|
||
goto port_unlock;
|
||
}
|
||
|
||
reinit_completion(&port->pps_complete);
|
||
port->pps_data.op_curr = op_curr;
|
||
port->pps_status = 0;
|
||
port->pps_pending = true;
|
||
tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
|
||
mutex_unlock(&port->lock);
|
||
|
||
if (!wait_for_completion_timeout(&port->pps_complete,
|
||
msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
ret = port->pps_status;
|
||
|
||
goto swap_unlock;
|
||
|
||
port_unlock:
|
||
mutex_unlock(&port->lock);
|
||
swap_unlock:
|
||
mutex_unlock(&port->swap_lock);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int tcpm_pps_set_out_volt(struct tcpm_port *port, u16 out_volt)
|
||
{
|
||
unsigned int target_mw;
|
||
int ret;
|
||
|
||
mutex_lock(&port->swap_lock);
|
||
mutex_lock(&port->lock);
|
||
|
||
if (!port->pps_data.active) {
|
||
ret = -EOPNOTSUPP;
|
||
goto port_unlock;
|
||
}
|
||
|
||
if (port->state != SNK_READY) {
|
||
ret = -EAGAIN;
|
||
goto port_unlock;
|
||
}
|
||
|
||
if (out_volt < port->pps_data.min_volt ||
|
||
out_volt > port->pps_data.max_volt) {
|
||
ret = -EINVAL;
|
||
goto port_unlock;
|
||
}
|
||
|
||
target_mw = (port->pps_data.op_curr * out_volt) / 1000;
|
||
if (target_mw < port->operating_snk_mw) {
|
||
ret = -EINVAL;
|
||
goto port_unlock;
|
||
}
|
||
|
||
reinit_completion(&port->pps_complete);
|
||
port->pps_data.out_volt = out_volt;
|
||
port->pps_status = 0;
|
||
port->pps_pending = true;
|
||
tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
|
||
mutex_unlock(&port->lock);
|
||
|
||
if (!wait_for_completion_timeout(&port->pps_complete,
|
||
msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
ret = port->pps_status;
|
||
|
||
goto swap_unlock;
|
||
|
||
port_unlock:
|
||
mutex_unlock(&port->lock);
|
||
swap_unlock:
|
||
mutex_unlock(&port->swap_lock);
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int tcpm_pps_activate(struct tcpm_port *port, bool activate)
|
||
{
|
||
int ret = 0;
|
||
|
||
mutex_lock(&port->swap_lock);
|
||
mutex_lock(&port->lock);
|
||
|
||
if (!port->pps_data.supported) {
|
||
ret = -EOPNOTSUPP;
|
||
goto port_unlock;
|
||
}
|
||
|
||
/* Trying to deactivate PPS when already deactivated so just bail */
|
||
if (!port->pps_data.active && !activate)
|
||
goto port_unlock;
|
||
|
||
if (port->state != SNK_READY) {
|
||
ret = -EAGAIN;
|
||
goto port_unlock;
|
||
}
|
||
|
||
reinit_completion(&port->pps_complete);
|
||
port->pps_status = 0;
|
||
port->pps_pending = true;
|
||
|
||
/* Trigger PPS request or move back to standard PDO contract */
|
||
if (activate) {
|
||
port->pps_data.out_volt = port->supply_voltage;
|
||
port->pps_data.op_curr = port->current_limit;
|
||
tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
|
||
} else {
|
||
tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
|
||
}
|
||
mutex_unlock(&port->lock);
|
||
|
||
if (!wait_for_completion_timeout(&port->pps_complete,
|
||
msecs_to_jiffies(PD_PPS_CTRL_TIMEOUT)))
|
||
ret = -ETIMEDOUT;
|
||
else
|
||
ret = port->pps_status;
|
||
|
||
goto swap_unlock;
|
||
|
||
port_unlock:
|
||
mutex_unlock(&port->lock);
|
||
swap_unlock:
|
||
mutex_unlock(&port->swap_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, PORT_RESET, 0);
|
||
}
|
||
|
||
static int tcpm_port_type_set(const struct typec_capability *cap,
|
||
enum typec_port_type type)
|
||
{
|
||
struct tcpm_port *port = typec_cap_to_tcpm(cap);
|
||
|
||
mutex_lock(&port->lock);
|
||
if (type == port->port_type)
|
||
goto port_unlock;
|
||
|
||
port->port_type = type;
|
||
|
||
if (!port->connected) {
|
||
tcpm_set_state(port, PORT_RESET, 0);
|
||
} else if (type == TYPEC_PORT_SNK) {
|
||
if (!(port->pwr_role == TYPEC_SINK &&
|
||
port->data_role == TYPEC_DEVICE))
|
||
tcpm_set_state(port, PORT_RESET, 0);
|
||
} else if (type == TYPEC_PORT_SRC) {
|
||
if (!(port->pwr_role == TYPEC_SOURCE &&
|
||
port->data_role == TYPEC_HOST))
|
||
tcpm_set_state(port, PORT_RESET, 0);
|
||
}
|
||
|
||
port_unlock:
|
||
mutex_unlock(&port->lock);
|
||
return 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;
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
static int tcpm_fw_get_caps(struct tcpm_port *port,
|
||
struct fwnode_handle *fwnode)
|
||
{
|
||
const char *cap_str;
|
||
int ret;
|
||
u32 mw;
|
||
|
||
if (!fwnode)
|
||
return -EINVAL;
|
||
|
||
/* USB data support is optional */
|
||
ret = fwnode_property_read_string(fwnode, "data-role", &cap_str);
|
||
if (ret == 0) {
|
||
port->typec_caps.data = typec_find_port_data_role(cap_str);
|
||
if (port->typec_caps.data < 0)
|
||
return -EINVAL;
|
||
}
|
||
|
||
ret = fwnode_property_read_string(fwnode, "power-role", &cap_str);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
port->typec_caps.type = typec_find_port_power_role(cap_str);
|
||
if (port->typec_caps.type < 0)
|
||
return -EINVAL;
|
||
port->port_type = port->typec_caps.type;
|
||
|
||
if (port->port_type == TYPEC_PORT_SNK)
|
||
goto sink;
|
||
|
||
/* Get source pdos */
|
||
ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
|
||
NULL, 0);
|
||
if (ret <= 0)
|
||
return -EINVAL;
|
||
|
||
port->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
|
||
ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
|
||
port->src_pdo, port->nr_src_pdo);
|
||
if ((ret < 0) || tcpm_validate_caps(port, port->src_pdo,
|
||
port->nr_src_pdo))
|
||
return -EINVAL;
|
||
|
||
if (port->port_type == TYPEC_PORT_SRC)
|
||
return 0;
|
||
|
||
/* Get the preferred power role for DRP */
|
||
ret = fwnode_property_read_string(fwnode, "try-power-role", &cap_str);
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
port->typec_caps.prefer_role = typec_find_power_role(cap_str);
|
||
if (port->typec_caps.prefer_role < 0)
|
||
return -EINVAL;
|
||
sink:
|
||
/* Get sink pdos */
|
||
ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
|
||
NULL, 0);
|
||
if (ret <= 0)
|
||
return -EINVAL;
|
||
|
||
port->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
|
||
ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
|
||
port->snk_pdo, port->nr_snk_pdo);
|
||
if ((ret < 0) || tcpm_validate_caps(port, port->snk_pdo,
|
||
port->nr_snk_pdo))
|
||
return -EINVAL;
|
||
|
||
if (fwnode_property_read_u32(fwnode, "op-sink-microwatt", &mw) < 0)
|
||
return -EINVAL;
|
||
port->operating_snk_mw = mw / 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
|
||
unsigned int nr_pdo)
|
||
{
|
||
if (tcpm_validate_caps(port, pdo, nr_pdo))
|
||
return -EINVAL;
|
||
|
||
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);
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(tcpm_update_source_capabilities);
|
||
|
||
int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
|
||
unsigned int nr_pdo,
|
||
unsigned int operating_snk_mw)
|
||
{
|
||
if (tcpm_validate_caps(port, pdo, nr_pdo))
|
||
return -EINVAL;
|
||
|
||
mutex_lock(&port->lock);
|
||
port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, pdo, nr_pdo);
|
||
port->operating_snk_mw = operating_snk_mw;
|
||
port->update_sink_caps = true;
|
||
|
||
switch (port->state) {
|
||
case SNK_NEGOTIATE_CAPABILITIES:
|
||
case SNK_NEGOTIATE_PPS_CAPABILITIES:
|
||
case SNK_READY:
|
||
case SNK_TRANSITION_SINK:
|
||
case SNK_TRANSITION_SINK_VBUS:
|
||
if (port->pps_data.active)
|
||
tcpm_set_state(port, SNK_NEGOTIATE_PPS_CAPABILITIES, 0);
|
||
else
|
||
tcpm_set_state(port, SNK_NEGOTIATE_CAPABILITIES, 0);
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
mutex_unlock(&port->lock);
|
||
return 0;
|
||
}
|
||
EXPORT_SYMBOL_GPL(tcpm_update_sink_capabilities);
|
||
|
||
/* Power Supply access to expose source power information */
|
||
enum tcpm_psy_online_states {
|
||
TCPM_PSY_OFFLINE = 0,
|
||
TCPM_PSY_FIXED_ONLINE,
|
||
TCPM_PSY_PROG_ONLINE,
|
||
};
|
||
|
||
static enum power_supply_property tcpm_psy_props[] = {
|
||
POWER_SUPPLY_PROP_USB_TYPE,
|
||
POWER_SUPPLY_PROP_ONLINE,
|
||
POWER_SUPPLY_PROP_VOLTAGE_MIN,
|
||
POWER_SUPPLY_PROP_VOLTAGE_MAX,
|
||
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
||
POWER_SUPPLY_PROP_CURRENT_MAX,
|
||
POWER_SUPPLY_PROP_CURRENT_NOW,
|
||
};
|
||
|
||
static int tcpm_psy_get_online(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
if (port->vbus_charge) {
|
||
if (port->pps_data.active)
|
||
val->intval = TCPM_PSY_PROG_ONLINE;
|
||
else
|
||
val->intval = TCPM_PSY_FIXED_ONLINE;
|
||
} else {
|
||
val->intval = TCPM_PSY_OFFLINE;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_voltage_min(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
if (port->pps_data.active)
|
||
val->intval = port->pps_data.min_volt * 1000;
|
||
else
|
||
val->intval = port->supply_voltage * 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_voltage_max(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
if (port->pps_data.active)
|
||
val->intval = port->pps_data.max_volt * 1000;
|
||
else
|
||
val->intval = port->supply_voltage * 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_voltage_now(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
val->intval = port->supply_voltage * 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_current_max(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
if (port->pps_data.active)
|
||
val->intval = port->pps_data.max_curr * 1000;
|
||
else
|
||
val->intval = port->current_limit * 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_current_now(struct tcpm_port *port,
|
||
union power_supply_propval *val)
|
||
{
|
||
val->intval = port->current_limit * 1000;
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int tcpm_psy_get_prop(struct power_supply *psy,
|
||
enum power_supply_property psp,
|
||
union power_supply_propval *val)
|
||
{
|
||
struct tcpm_port *port = power_supply_get_drvdata(psy);
|
||
int ret = 0;
|
||
|
||
switch (psp) {
|
||
case POWER_SUPPLY_PROP_USB_TYPE:
|
||
val->intval = port->usb_type;
|
||
break;
|
||
case POWER_SUPPLY_PROP_ONLINE:
|
||
ret = tcpm_psy_get_online(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
|
||
ret = tcpm_psy_get_voltage_min(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
|
||
ret = tcpm_psy_get_voltage_max(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
||
ret = tcpm_psy_get_voltage_now(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_CURRENT_MAX:
|
||
ret = tcpm_psy_get_current_max(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
||
ret = tcpm_psy_get_current_now(port, val);
|
||
break;
|
||
default:
|
||
ret = -EINVAL;
|
||
break;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int tcpm_psy_set_online(struct tcpm_port *port,
|
||
const union power_supply_propval *val)
|
||
{
|
||
int ret;
|
||
|
||
switch (val->intval) {
|
||
case TCPM_PSY_FIXED_ONLINE:
|
||
ret = tcpm_pps_activate(port, false);
|
||
break;
|
||
case TCPM_PSY_PROG_ONLINE:
|
||
ret = tcpm_pps_activate(port, true);
|
||
break;
|
||
default:
|
||
ret = -EINVAL;
|
||
break;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int tcpm_psy_set_prop(struct power_supply *psy,
|
||
enum power_supply_property psp,
|
||
const union power_supply_propval *val)
|
||
{
|
||
struct tcpm_port *port = power_supply_get_drvdata(psy);
|
||
int ret;
|
||
|
||
switch (psp) {
|
||
case POWER_SUPPLY_PROP_ONLINE:
|
||
ret = tcpm_psy_set_online(port, val);
|
||
break;
|
||
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
||
if (val->intval < port->pps_data.min_volt * 1000 ||
|
||
val->intval > port->pps_data.max_volt * 1000)
|
||
ret = -EINVAL;
|
||
else
|
||
ret = tcpm_pps_set_out_volt(port, val->intval / 1000);
|
||
break;
|
||
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
||
if (val->intval > port->pps_data.max_curr * 1000)
|
||
ret = -EINVAL;
|
||
else
|
||
ret = tcpm_pps_set_op_curr(port, val->intval / 1000);
|
||
break;
|
||
default:
|
||
ret = -EINVAL;
|
||
break;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
static int tcpm_psy_prop_writeable(struct power_supply *psy,
|
||
enum power_supply_property psp)
|
||
{
|
||
switch (psp) {
|
||
case POWER_SUPPLY_PROP_ONLINE:
|
||
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
||
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
||
return 1;
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
static enum power_supply_usb_type tcpm_psy_usb_types[] = {
|
||
POWER_SUPPLY_USB_TYPE_C,
|
||
POWER_SUPPLY_USB_TYPE_PD,
|
||
POWER_SUPPLY_USB_TYPE_PD_PPS,
|
||
};
|
||
|
||
static const char *tcpm_psy_name_prefix = "tcpm-source-psy-";
|
||
|
||
static int devm_tcpm_psy_register(struct tcpm_port *port)
|
||
{
|
||
struct power_supply_config psy_cfg = {};
|
||
const char *port_dev_name = dev_name(port->dev);
|
||
size_t psy_name_len = strlen(tcpm_psy_name_prefix) +
|
||
strlen(port_dev_name) + 1;
|
||
char *psy_name;
|
||
|
||
psy_cfg.drv_data = port;
|
||
psy_cfg.fwnode = dev_fwnode(port->dev);
|
||
psy_name = devm_kzalloc(port->dev, psy_name_len, GFP_KERNEL);
|
||
if (!psy_name)
|
||
return -ENOMEM;
|
||
|
||
snprintf(psy_name, psy_name_len, "%s%s", tcpm_psy_name_prefix,
|
||
port_dev_name);
|
||
port->psy_desc.name = psy_name;
|
||
port->psy_desc.type = POWER_SUPPLY_TYPE_USB,
|
||
port->psy_desc.usb_types = tcpm_psy_usb_types;
|
||
port->psy_desc.num_usb_types = ARRAY_SIZE(tcpm_psy_usb_types);
|
||
port->psy_desc.properties = tcpm_psy_props,
|
||
port->psy_desc.num_properties = ARRAY_SIZE(tcpm_psy_props),
|
||
port->psy_desc.get_property = tcpm_psy_get_prop,
|
||
port->psy_desc.set_property = tcpm_psy_set_prop,
|
||
port->psy_desc.property_is_writeable = tcpm_psy_prop_writeable,
|
||
|
||
port->usb_type = POWER_SUPPLY_USB_TYPE_C;
|
||
|
||
port->psy = devm_power_supply_register(port->dev, &port->psy_desc,
|
||
&psy_cfg);
|
||
|
||
return PTR_ERR_OR_ZERO(port->psy);
|
||
}
|
||
|
||
static int tcpm_copy_caps(struct tcpm_port *port,
|
||
const struct tcpc_config *tcfg)
|
||
{
|
||
if (tcpm_validate_caps(port, tcfg->src_pdo, tcfg->nr_src_pdo) ||
|
||
tcpm_validate_caps(port, tcfg->snk_pdo, tcfg->nr_snk_pdo))
|
||
return -EINVAL;
|
||
|
||
port->nr_src_pdo = tcpm_copy_pdos(port->src_pdo, tcfg->src_pdo,
|
||
tcfg->nr_src_pdo);
|
||
port->nr_snk_pdo = tcpm_copy_pdos(port->snk_pdo, tcfg->snk_pdo,
|
||
tcfg->nr_snk_pdo);
|
||
|
||
port->nr_snk_vdo = tcpm_copy_vdos(port->snk_vdo, tcfg->snk_vdo,
|
||
tcfg->nr_snk_vdo);
|
||
|
||
port->operating_snk_mw = tcfg->operating_snk_mw;
|
||
|
||
port->typec_caps.prefer_role = tcfg->default_role;
|
||
port->typec_caps.type = tcfg->type;
|
||
port->typec_caps.data = tcfg->data;
|
||
|
||
return 0;
|
||
}
|
||
|
||
struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc)
|
||
{
|
||
struct tcpm_port *port;
|
||
int i, err;
|
||
|
||
if (!dev || !tcpc ||
|
||
!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);
|
||
init_completion(&port->pps_complete);
|
||
tcpm_debugfs_init(port);
|
||
|
||
err = tcpm_fw_get_caps(port, tcpc->fwnode);
|
||
if ((err < 0) && tcpc->config)
|
||
err = tcpm_copy_caps(port, tcpc->config);
|
||
if (err < 0)
|
||
goto out_destroy_wq;
|
||
|
||
if (!tcpc->config || !tcpc->config->try_role_hw)
|
||
port->try_role = port->typec_caps.prefer_role;
|
||
else
|
||
port->try_role = TYPEC_NO_PREFERRED_ROLE;
|
||
|
||
port->typec_caps.fwnode = tcpc->fwnode;
|
||
port->typec_caps.revision = 0x0120; /* Type-C spec release 1.2 */
|
||
port->typec_caps.pd_revision = 0x0300; /* USB-PD spec release 3.0 */
|
||
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->typec_caps.port_type_set = tcpm_port_type_set;
|
||
|
||
port->partner_desc.identity = &port->partner_ident;
|
||
port->port_type = port->typec_caps.type;
|
||
|
||
port->role_sw = usb_role_switch_get(port->dev);
|
||
if (IS_ERR(port->role_sw)) {
|
||
err = PTR_ERR(port->role_sw);
|
||
goto out_destroy_wq;
|
||
}
|
||
|
||
err = devm_tcpm_psy_register(port);
|
||
if (err)
|
||
goto out_destroy_wq;
|
||
|
||
port->typec_port = typec_register_port(port->dev, &port->typec_caps);
|
||
if (IS_ERR(port->typec_port)) {
|
||
err = PTR_ERR(port->typec_port);
|
||
goto out_destroy_wq;
|
||
}
|
||
|
||
if (tcpc->config && tcpc->config->alt_modes) {
|
||
const struct typec_altmode_desc *paltmode = tcpc->config->alt_modes;
|
||
|
||
i = 0;
|
||
while (paltmode->svid && i < ARRAY_SIZE(port->port_altmode)) {
|
||
struct typec_altmode *alt;
|
||
|
||
alt = typec_port_register_altmode(port->typec_port,
|
||
paltmode);
|
||
if (IS_ERR(alt)) {
|
||
tcpm_log(port,
|
||
"%s: failed to register port alternate mode 0x%x",
|
||
dev_name(dev), paltmode->svid);
|
||
break;
|
||
}
|
||
typec_altmode_set_drvdata(alt, port);
|
||
alt->ops = &tcpm_altmode_ops;
|
||
port->port_altmode[i] = alt;
|
||
i++;
|
||
paltmode++;
|
||
}
|
||
}
|
||
|
||
mutex_lock(&port->lock);
|
||
tcpm_init(port);
|
||
mutex_unlock(&port->lock);
|
||
|
||
tcpm_log(port, "%s: registered", dev_name(dev));
|
||
return port;
|
||
|
||
out_destroy_wq:
|
||
usb_role_switch_put(port->role_sw);
|
||
destroy_workqueue(port->wq);
|
||
return ERR_PTR(err);
|
||
}
|
||
EXPORT_SYMBOL_GPL(tcpm_register_port);
|
||
|
||
void tcpm_unregister_port(struct tcpm_port *port)
|
||
{
|
||
int i;
|
||
|
||
tcpm_reset_port(port);
|
||
for (i = 0; i < ARRAY_SIZE(port->port_altmode); i++)
|
||
typec_unregister_altmode(port->port_altmode[i]);
|
||
typec_unregister_port(port->typec_port);
|
||
usb_role_switch_put(port->role_sw);
|
||
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");
|