/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ /* USB Power delivery module */ #ifndef __CROS_EC_USB_PD_H #define __CROS_EC_USB_PD_H #include "common.h" /* PD Host command timeout */ #define PD_HOST_COMMAND_TIMEOUT_US SECOND #ifdef CONFIG_USB_PD_PORT_COUNT /* * Define PD_PORT_TO_TASK_ID() and TASK_ID_TO_PD_PORT() macros to * go between PD port number and task ID. Assume that TASK_ID_PD_C0 is the * lowest task ID and IDs are on a continuous range. */ #ifdef HAS_TASK_PD_C0 #define PD_PORT_TO_TASK_ID(port) (TASK_ID_PD_C0 + (port)) #define TASK_ID_TO_PD_PORT(id) ((id) - TASK_ID_PD_C0) #else #define PD_PORT_TO_TASK_ID(port) -1 /* dummy task ID */ #define TASK_ID_TO_PD_PORT(id) 0 #endif /* CONFIG_COMMON_RUNTIME */ #endif /* CONFIG_USB_PD_PORT_COUNT */ enum pd_rx_errors { PD_RX_ERR_INVAL = -1, /* Invalid packet */ PD_RX_ERR_HARD_RESET = -2, /* Got a Hard-Reset packet */ PD_RX_ERR_CRC = -3, /* CRC mismatch */ PD_RX_ERR_ID = -4, /* Invalid ID number */ PD_RX_ERR_UNSUPPORTED_SOP = -5, /* Unsupported SOP */ PD_RX_ERR_CABLE_RESET = -6 /* Got a Cable-Reset packet */ }; /* Events for USB PD task */ #define PD_EVENT_RX (1<<2) /* Incoming packet event */ #define PD_EVENT_TX (1<<3) /* Outgoing packet event */ #define PD_EVENT_CC (1<<4) /* CC line change event */ #define PD_EVENT_TCPC_RESET (1<<5) /* TCPC has reset */ #define PD_EVENT_UPDATE_DUAL_ROLE (1<<6) /* DRP state has changed */ /* --- PD data message helpers --- */ #define PDO_MAX_OBJECTS 7 #define PDO_MODES (PDO_MAX_OBJECTS - 1) /* PDO : Power Data Object */ /* * 1. The vSafe5V Fixed Supply Object shall always be the first object. * 2. The remaining Fixed Supply Objects, * if present, shall be sent in voltage order; lowest to highest. * 3. The Battery Supply Objects, * if present shall be sent in Minimum Voltage order; lowest to highest. * 4. The Variable Supply (non battery) Objects, * if present, shall be sent in Minimum Voltage order; lowest to highest. */ #define PDO_TYPE_FIXED (0 << 30) #define PDO_TYPE_BATTERY BIT(30) #define PDO_TYPE_VARIABLE (2 << 30) #define PDO_TYPE_MASK (3 << 30) #define PDO_FIXED_DUAL_ROLE BIT(29) /* Dual role device */ #define PDO_FIXED_SUSPEND BIT(28) /* USB Suspend supported */ #define PDO_FIXED_EXTERNAL BIT(27) /* Externally powered */ #define PDO_FIXED_COMM_CAP BIT(26) /* USB Communications Capable */ #define PDO_FIXED_DATA_SWAP BIT(25) /* Data role swap command supported */ #define PDO_FIXED_PEAK_CURR () /* [21..20] Peak current */ #define PDO_FIXED_VOLT(mv) (((mv)/50) << 10) /* Voltage in 50mV units */ #define PDO_FIXED_CURR(ma) (((ma)/10) << 0) /* Max current in 10mA units */ #define PDO_FIXED(mv, ma, flags) (PDO_FIXED_VOLT(mv) |\ PDO_FIXED_CURR(ma) | (flags)) #define PDO_VAR_MAX_VOLT(mv) ((((mv) / 50) & 0x3FF) << 20) #define PDO_VAR_MIN_VOLT(mv) ((((mv) / 50) & 0x3FF) << 10) #define PDO_VAR_OP_CURR(ma) ((((ma) / 10) & 0x3FF) << 0) #define PDO_VAR(min_mv, max_mv, op_ma) \ (PDO_VAR_MIN_VOLT(min_mv) | \ PDO_VAR_MAX_VOLT(max_mv) | \ PDO_VAR_OP_CURR(op_ma) | \ PDO_TYPE_VARIABLE) #define PDO_BATT_MAX_VOLT(mv) ((((mv) / 50) & 0x3FF) << 20) #define PDO_BATT_MIN_VOLT(mv) ((((mv) / 50) & 0x3FF) << 10) #define PDO_BATT_OP_POWER(mw) ((((mw) / 250) & 0x3FF) << 0) #define PDO_BATT(min_mv, max_mv, op_mw) \ (PDO_BATT_MIN_VOLT(min_mv) | \ PDO_BATT_MAX_VOLT(max_mv) | \ PDO_BATT_OP_POWER(op_mw) | \ PDO_TYPE_BATTERY) /* RDO : Request Data Object */ #define RDO_OBJ_POS(n) (((n) & 0x7) << 28) #define RDO_POS(rdo) (((rdo) >> 28) & 0x7) #define RDO_GIVE_BACK BIT(27) #define RDO_CAP_MISMATCH BIT(26) #define RDO_COMM_CAP BIT(25) #define RDO_NO_SUSPEND BIT(24) #define RDO_FIXED_VAR_OP_CURR(ma) ((((ma) / 10) & 0x3FF) << 10) #define RDO_FIXED_VAR_MAX_CURR(ma) ((((ma) / 10) & 0x3FF) << 0) #define RDO_BATT_OP_POWER(mw) ((((mw) / 250) & 0x3FF) << 10) #define RDO_BATT_MAX_POWER(mw) ((((mw) / 250) & 0x3FF) << 10) #define RDO_FIXED(n, op_ma, max_ma, flags) \ (RDO_OBJ_POS(n) | (flags) | \ RDO_FIXED_VAR_OP_CURR(op_ma) | \ RDO_FIXED_VAR_MAX_CURR(max_ma)) #define RDO_BATT(n, op_mw, max_mw, flags) \ (RDO_OBJ_POS(n) | (flags) | \ RDO_BATT_OP_POWER(op_mw) | \ RDO_BATT_MAX_POWER(max_mw)) /* BDO : BIST Data Object */ #define BDO_MODE_RECV (0 << 28) #define BDO_MODE_TRANSMIT BIT(28) #define BDO_MODE_COUNTERS (2 << 28) #define BDO_MODE_CARRIER0 (3 << 28) #define BDO_MODE_CARRIER1 (4 << 28) #define BDO_MODE_CARRIER2 (5 << 28) #define BDO_MODE_CARRIER3 (6 << 28) #define BDO_MODE_EYE (7 << 28) #define BDO(mode, cnt) ((mode) | ((cnt) & 0xFFFF)) #define SVID_DISCOVERY_MAX 16 /* Timers */ #define PD_T_SEND_SOURCE_CAP (100*MSEC) /* between 100ms and 200ms */ #define PD_T_SINK_WAIT_CAP (600*MSEC) /* between 310ms and 620ms */ #define PD_T_SINK_TRANSITION (35*MSEC) /* between 20ms and 35ms */ #define PD_T_SOURCE_ACTIVITY (45*MSEC) /* between 40ms and 50ms */ #define PD_T_SENDER_RESPONSE (30*MSEC) /* between 24ms and 30ms */ #define PD_T_PS_TRANSITION (500*MSEC) /* between 450ms and 550ms */ #define PD_T_PS_SOURCE_ON (480*MSEC) /* between 390ms and 480ms */ #define PD_T_PS_SOURCE_OFF (920*MSEC) /* between 750ms and 920ms */ #define PD_T_PS_HARD_RESET (25*MSEC) /* between 25ms and 35ms */ #define PD_T_ERROR_RECOVERY (25*MSEC) /* 25ms */ #define PD_T_CC_DEBOUNCE (100*MSEC) /* between 100ms and 200ms */ /* DRP_SNK + DRP_SRC must be between 50ms and 100ms with 30%-70% duty cycle */ #define PD_T_DRP_SNK (40*MSEC) /* toggle time for sink DRP */ #define PD_T_DRP_SRC (30*MSEC) /* toggle time for source DRP */ #define PD_T_DEBOUNCE (15*MSEC) /* between 10ms and 20ms */ #define PD_T_SINK_ADJ (55*MSEC) /* between PD_T_DEBOUNCE and 60ms */ #define PD_T_SRC_RECOVER (760*MSEC) /* between 660ms and 1000ms */ #define PD_T_SRC_RECOVER_MAX (1000*MSEC) /* 1000ms */ #define PD_T_SRC_TURN_ON (275*MSEC) /* 275ms */ #define PD_T_SAFE_0V (650*MSEC) /* 650ms */ #define PD_T_NO_RESPONSE (5500*MSEC) /* between 4.5s and 5.5s */ #define PD_T_BIST_TRANSMIT (50*MSEC) /* 50ms (used for task_wait arg) */ #define PD_T_BIST_RECEIVE (60*MSEC) /* 60ms (max time to process bist) */ #define PD_T_VCONN_SOURCE_ON (100*MSEC) /* 100ms */ #define PD_T_TRY_SRC (125*MSEC) /* Max time for Try.SRC state */ #define PD_T_TRY_WAIT (600*MSEC) /* Max time for TryWait.SNK state */ #define PD_T_SINK_REQUEST (100*MSEC) /* Wait 100ms before next request */ /* number of edges and time window to detect CC line is not idle */ #define PD_RX_TRANSITION_COUNT 3 #define PD_RX_TRANSITION_WINDOW 20 /* between 12us and 20us */ /* from USB Type-C Specification Table 5-1 */ #define PD_T_AME (1*SECOND) /* timeout from UFP attach to Alt Mode Entry */ /* VDM Timers ( USB PD Spec Rev2.0 Table 6-30 )*/ #define PD_T_VDM_BUSY (100*MSEC) /* at least 100ms */ #define PD_T_VDM_E_MODE (25*MSEC) /* enter/exit the same max */ #define PD_T_VDM_RCVR_RSP (15*MSEC) /* max of 15ms */ #define PD_T_VDM_SNDR_RSP (30*MSEC) /* max of 30ms */ #define PD_T_VDM_WAIT_MODE_E (100*MSEC) /* enter/exit the same max */ /* function table for entered mode */ struct amode_fx { int (*status)(int port, uint32_t *payload); int (*config)(int port, uint32_t *payload); }; /* function table for alternate mode capable responders */ struct svdm_response { int (*identity)(int port, uint32_t *payload); int (*svids)(int port, uint32_t *payload); int (*modes)(int port, uint32_t *payload); int (*enter_mode)(int port, uint32_t *payload); int (*exit_mode)(int port, uint32_t *payload); struct amode_fx *amode; }; struct svdm_svid_data { uint16_t svid; int mode_cnt; uint32_t mode_vdo[PDO_MODES]; }; struct svdm_amode_fx { uint16_t svid; int (*enter)(int port, uint32_t mode_caps); int (*status)(int port, uint32_t *payload); int (*config)(int port, uint32_t *payload); void (*post_config)(int port); int (*attention)(int port, uint32_t *payload); void (*exit)(int port); }; /* defined in /usb_pd_policy.c */ /* All UFP_U should have */ extern const struct svdm_response svdm_rsp; /* All DFP_U should have */ extern const struct svdm_amode_fx supported_modes[]; extern const int supported_modes_cnt; /* DFP data needed to support alternate mode entry and exit */ struct svdm_amode_data { const struct svdm_amode_fx *fx; /* VDM object position */ int opos; /* mode capabilities specific to SVID amode. */ struct svdm_svid_data *data; }; enum hpd_event { hpd_none, hpd_low, hpd_high, hpd_irq, }; /* DisplayPort flags */ #define DP_FLAGS_DP_ON BIT(0) /* Display port mode is on */ #define DP_FLAGS_HPD_HI_PENDING BIT(1) /* Pending HPD_HI */ /* supported alternate modes */ enum pd_alternate_modes { PD_AMODE_GOOGLE, PD_AMODE_DISPLAYPORT, /* not a real mode */ PD_AMODE_COUNT, }; /* Policy structure for driving alternate mode */ struct pd_policy { /* index of svid currently being operated on */ int svid_idx; /* count of svids discovered */ int svid_cnt; /* SVDM identity info (Id, Cert Stat, 0-4 Typec specific) */ uint32_t identity[PDO_MAX_OBJECTS - 1]; /* supported svids & corresponding vdo mode data */ struct svdm_svid_data svids[SVID_DISCOVERY_MAX]; /* active modes */ struct svdm_amode_data amodes[PD_AMODE_COUNT]; /* Next index to insert DFP alternate mode into amodes */ int amode_idx; }; /* * VDO : Vendor Defined Message Object * VDM object is minimum of VDM header + 6 additional data objects. */ /* * VDM header * ---------- * <31:16> :: SVID * <15> :: VDM type ( 1b == structured, 0b == unstructured ) * <14:13> :: Structured VDM version (can only be 00 == 1.0 currently) * <12:11> :: reserved * <10:8> :: object position (1-7 valid ... used for enter/exit mode only) * <7:6> :: command type (SVDM only?) * <5> :: reserved (SVDM), command type (UVDM) * <4:0> :: command */ #define VDO_MAX_SIZE 7 #define VDO(vid, type, custom) \ (((vid) << 16) | \ ((type) << 15) | \ ((custom) & 0x7FFF)) #define VDO_SVDM_TYPE BIT(15) #define VDO_SVDM_VERS(x) (x << 13) #define VDO_OPOS(x) (x << 8) #define VDO_CMDT(x) (x << 6) #define VDO_OPOS_MASK VDO_OPOS(0x7) #define VDO_CMDT_MASK VDO_CMDT(0x3) #define CMDT_INIT 0 #define CMDT_RSP_ACK 1 #define CMDT_RSP_NAK 2 #define CMDT_RSP_BUSY 3 /* reserved for SVDM ... for Google UVDM */ #define VDO_SRC_INITIATOR (0 << 5) #define VDO_SRC_RESPONDER BIT(5) #define CMD_DISCOVER_IDENT 1 #define CMD_DISCOVER_SVID 2 #define CMD_DISCOVER_MODES 3 #define CMD_ENTER_MODE 4 #define CMD_EXIT_MODE 5 #define CMD_ATTENTION 6 #define CMD_DP_STATUS 16 #define CMD_DP_CONFIG 17 #define VDO_CMD_VENDOR(x) (((10 + (x)) & 0x1f)) /* ChromeOS specific commands */ #define VDO_CMD_VERSION VDO_CMD_VENDOR(0) #define VDO_CMD_SEND_INFO VDO_CMD_VENDOR(1) #define VDO_CMD_READ_INFO VDO_CMD_VENDOR(2) #define VDO_CMD_REBOOT VDO_CMD_VENDOR(5) #define VDO_CMD_FLASH_ERASE VDO_CMD_VENDOR(6) #define VDO_CMD_FLASH_WRITE VDO_CMD_VENDOR(7) #define VDO_CMD_ERASE_SIG VDO_CMD_VENDOR(8) #define VDO_CMD_PING_ENABLE VDO_CMD_VENDOR(10) #define VDO_CMD_CURRENT VDO_CMD_VENDOR(11) #define VDO_CMD_FLIP VDO_CMD_VENDOR(12) #define VDO_CMD_GET_LOG VDO_CMD_VENDOR(13) #define VDO_CMD_CCD_EN VDO_CMD_VENDOR(14) #define PD_VDO_VID(vdo) ((vdo) >> 16) #define PD_VDO_SVDM(vdo) (((vdo) >> 15) & 1) #define PD_VDO_OPOS(vdo) (((vdo) >> 8) & 0x7) #define PD_VDO_CMD(vdo) ((vdo) & 0x1f) #define PD_VDO_CMDT(vdo) (((vdo) >> 6) & 0x3) /* * SVDM Identity request -> response * * Request is simply properly formatted SVDM header * * Response is 4 data objects: * [0] :: SVDM header * [1] :: Identitiy header * [2] :: Cert Stat VDO * [3] :: (Product | Cable) VDO * [4] :: AMA VDO * */ #define VDO_INDEX_HDR 0 #define VDO_INDEX_IDH 1 #define VDO_INDEX_CSTAT 2 #define VDO_INDEX_CABLE 3 #define VDO_INDEX_PRODUCT 3 #define VDO_INDEX_AMA 4 #define VDO_I(name) VDO_INDEX_##name /* * SVDM Identity Header * -------------------- * <31> :: data capable as a USB host * <30> :: data capable as a USB device * <29:27> :: product type * <26> :: modal operation supported (1b == yes) * <25:16> :: SBZ * <15:0> :: USB-IF assigned VID for this cable vendor */ #define IDH_PTYPE_UNDEF 0 #define IDH_PTYPE_HUB 1 #define IDH_PTYPE_PERIPH 2 #define IDH_PTYPE_PCABLE 3 #define IDH_PTYPE_ACABLE 4 #define IDH_PTYPE_AMA 5 #define VDO_IDH(usbh, usbd, ptype, is_modal, vid) \ ((usbh) << 31 | (usbd) << 30 | ((ptype) & 0x7) << 27 \ | (is_modal) << 26 | ((vid) & 0xffff)) #define PD_IDH_PTYPE(vdo) (((vdo) >> 27) & 0x7) #define PD_IDH_VID(vdo) ((vdo) & 0xffff) /* * Cert Stat VDO * ------------- * <31:20> : SBZ * <19:0> : USB-IF assigned TID for this cable */ #define VDO_CSTAT(tid) ((tid) & 0xfffff) #define PD_CSTAT_TID(vdo) ((vdo) & 0xfffff) /* * Product VDO * ----------- * <31:16> : USB Product ID * <15:0> : USB bcdDevice */ #define VDO_PRODUCT(pid, bcd) (((pid) & 0xffff) << 16 | ((bcd) & 0xffff)) #define PD_PRODUCT_PID(vdo) (((vdo) >> 16) & 0xffff) /* * Cable VDO * --------- * <31:28> :: Cable HW version * <27:24> :: Cable FW version * <23:20> :: SBZ * <19:18> :: type-C to Type-A/B/C (00b == A, 01 == B, 10 == C) * <17> :: Type-C to Plug/Receptacle (0b == plug, 1b == receptacle) * <16:13> :: cable latency (0001 == <10ns(~1m length)) * <12:11> :: cable termination type (11b == both ends active VCONN req) * <10> :: SSTX1 Directionality support (0b == fixed, 1b == cfgable) * <9> :: SSTX2 Directionality support * <8> :: SSRX1 Directionality support * <7> :: SSRX2 Directionality support * <6:5> :: Vbus current handling capability * <4> :: Vbus through cable (0b == no, 1b == yes) * <3> :: SOP" controller present? (0b == no, 1b == yes) * <2:0> :: USB SS Signaling support */ #define CABLE_ATYPE 0 #define CABLE_BTYPE 1 #define CABLE_CTYPE 2 #define CABLE_PLUG 0 #define CABLE_RECEPTACLE 1 #define CABLE_CURR_1A5 0 #define CABLE_CURR_3A 1 #define CABLE_CURR_5A 2 #define CABLE_USBSS_U2_ONLY 0 #define CABLE_USBSS_U31_GEN1 1 #define CABLE_USBSS_U31_GEN2 2 #define VDO_CABLE(hw, fw, cbl, gdr, lat, term, tx1d, tx2d, rx1d, rx2d, cur, vps, sopp, usbss) \ (((hw) & 0x7) << 28 | ((fw) & 0x7) << 24 | ((cbl) & 0x3) << 18 \ | (gdr) << 17 | ((lat) & 0x7) << 13 | ((term) & 0x3) << 11 \ | (tx1d) << 10 | (tx2d) << 9 | (rx1d) << 8 | (rx2d) << 7 \ | ((cur) & 0x3) << 5 | (vps) << 4 | (sopp) << 3 \ | ((usbss) & 0x7)) /* * AMA VDO * --------- * <31:28> :: Cable HW version * <27:24> :: Cable FW version * <23:12> :: SBZ * <11> :: SSTX1 Directionality support (0b == fixed, 1b == cfgable) * <10> :: SSTX2 Directionality support * <9> :: SSRX1 Directionality support * <8> :: SSRX2 Directionality support * <7:5> :: Vconn power * <4> :: Vconn power required * <3> :: Vbus power required * <2:0> :: USB SS Signaling support */ #define VDO_AMA(hw, fw, tx1d, tx2d, rx1d, rx2d, vcpwr, vcr, vbr, usbss) \ (((hw) & 0x7) << 28 | ((fw) & 0x7) << 24 \ | (tx1d) << 11 | (tx2d) << 10 | (rx1d) << 9 | (rx2d) << 8 \ | ((vcpwr) & 0x3) << 5 | (vcr) << 4 | (vbr) << 3 \ | ((usbss) & 0x7)) #define PD_VDO_AMA_VCONN_REQ(vdo) (((vdo) >> 4) & 1) #define PD_VDO_AMA_VBUS_REQ(vdo) (((vdo) >> 3) & 1) #define AMA_VCONN_PWR_1W 0 #define AMA_VCONN_PWR_1W5 1 #define AMA_VCONN_PWR_2W 2 #define AMA_VCONN_PWR_3W 3 #define AMA_VCONN_PWR_4W 4 #define AMA_VCONN_PWR_5W 5 #define AMA_VCONN_PWR_6W 6 #define AMA_USBSS_U2_ONLY 0 #define AMA_USBSS_U31_GEN1 1 #define AMA_USBSS_U31_GEN2 2 #define AMA_USBSS_BBONLY 3 /* * SVDM Discover SVIDs request -> response * * Request is properly formatted VDM Header with discover SVIDs command. * Response is a set of SVIDs of all all supported SVIDs with all zero's to * mark the end of SVIDs. If more than 12 SVIDs are supported command SHOULD be * repeated. */ #define VDO_SVID(svid0, svid1) (((svid0) & 0xffff) << 16 | ((svid1) & 0xffff)) #define PD_VDO_SVID_SVID0(vdo) ((vdo) >> 16) #define PD_VDO_SVID_SVID1(vdo) ((vdo) & 0xffff) /* * Google modes capabilities * <31:8> : reserved * <7:0> : mode */ #define VDO_MODE_GOOGLE(mode) (mode & 0xff) #define MODE_GOOGLE_FU 1 /* Firmware Update mode */ /* * Mode Capabilities * * Number of VDOs supplied is SID dependent (but <= 6 VDOS?) */ #define VDO_MODE_CNT_DISPLAYPORT 1 /* * DisplayPort modes capabilities * ------------------------------- * <31:24> : SBZ * <23:16> : UFP_D pin assignment supported * <15:8> : DFP_D pin assignment supported * <7> : USB 2.0 signaling (0b=yes, 1b=no) * <6> : Plug | Receptacle (0b == plug, 1b == receptacle) * <5:2> : xxx1: Supports DPv1.3, xx1x Supports USB Gen 2 signaling * Other bits are reserved. * <1:0> : signal direction ( 00b=rsv, 01b=sink, 10b=src 11b=both ) */ #define VDO_MODE_DP(snkp, srcp, usb, gdr, sign, sdir) \ (((snkp) & 0xff) << 16 | ((srcp) & 0xff) << 8 \ | ((usb) & 1) << 7 | ((gdr) & 1) << 6 | ((sign) & 0xF) << 2 \ | ((sdir) & 0x3)) #define PD_DP_PIN_CAPS(x) ((((x) >> 6) & 0x1) ? (((x) >> 16) & 0x3f) \ : (((x) >> 8) & 0x3f)) #define MODE_DP_PIN_A 0x01 #define MODE_DP_PIN_B 0x02 #define MODE_DP_PIN_C 0x04 #define MODE_DP_PIN_D 0x08 #define MODE_DP_PIN_E 0x10 #define MODE_DP_PIN_F 0x20 /* Pin configs B/D/F support multi-function */ #define MODE_DP_PIN_MF_MASK 0x2a /* Pin configs A/B support BR2 signaling levels */ #define MODE_DP_PIN_BR2_MASK 0x3 /* Pin configs C/D/E/F support DP signaling levels */ #define MODE_DP_PIN_DP_MASK 0x3c #define MODE_DP_V13 0x1 #define MODE_DP_GEN2 0x2 #define MODE_DP_SNK 0x1 #define MODE_DP_SRC 0x2 #define MODE_DP_BOTH 0x3 /* * DisplayPort Status VDO * ---------------------- * <31:9> : SBZ * <8> : IRQ_HPD : 1 == irq arrived since last message otherwise 0. * <7> : HPD state : 0 = HPD_LOW, 1 == HPD_HIGH * <6> : Exit DP Alt mode: 0 == maintain, 1 == exit * <5> : USB config : 0 == maintain current, 1 == switch to USB from DP * <4> : Multi-function preference : 0 == no pref, 1 == MF preferred. * <3> : enabled : is DPout on/off. * <2> : power low : 0 == normal or LPM disabled, 1 == DP disabled for LPM * <1:0> : connect status : 00b == no (DFP|UFP)_D is connected or disabled. * 01b == DFP_D connected, 10b == UFP_D connected, 11b == both. */ #define VDO_DP_STATUS(irq, lvl, amode, usbc, mf, en, lp, conn) \ (((irq) & 1) << 8 | ((lvl) & 1) << 7 | ((amode) & 1) << 6 \ | ((usbc) & 1) << 5 | ((mf) & 1) << 4 | ((en) & 1) << 3 \ | ((lp) & 1) << 2 | ((conn & 0x3) << 0)) #define PD_VDO_DPSTS_HPD_IRQ(x) (((x) >> 8) & 1) #define PD_VDO_DPSTS_HPD_LVL(x) (((x) >> 7) & 1) #define PD_VDO_DPSTS_MF_PREF(x) (((x) >> 4) & 1) /* Per DisplayPort Spec v1.3 Section 3.3 */ #define HPD_USTREAM_DEBOUNCE_LVL (2*MSEC) #define HPD_USTREAM_DEBOUNCE_IRQ (250) #define HPD_DSTREAM_DEBOUNCE_IRQ (750) /* between 500-1000us */ /* * DisplayPort Configure VDO * ------------------------- * <31:24> : SBZ * <23:16> : SBZ * <15:8> : Pin assignment requested. Choose one from mode caps. * <7:6> : SBZ * <5:2> : signalling : 1h == DP v1.3, 2h == Gen 2 * Oh is only for USB, remaining values are reserved * <1:0> : cfg : 00 == USB, 01 == DFP_D, 10 == UFP_D, 11 == reserved */ #define VDO_DP_CFG(pin, sig, cfg) \ (((pin) & 0xff) << 8 | ((sig) & 0xf) << 2 | ((cfg) & 0x3)) #define PD_DP_CFG_DPON(x) (((x & 0x3) == 1) || ((x & 0x3) == 2)) /* * Get the pin assignment mask * for backward compatibility, if it is null, * get the former sink pin assignment we used to be in <23:16>. */ #define PD_DP_CFG_PIN(x) ((((x) >> 8) & 0xff) ? (((x) >> 8) & 0xff) \ : (((x) >> 16) & 0xff)) /* * ChromeOS specific PD device Hardware IDs. Used to identify unique * products and used in VDO_INFO. Note this field is 10 bits. */ #define USB_PD_HW_DEV_ID_RESERVED 0 #define USB_PD_HW_DEV_ID_ZINGER 1 #define USB_PD_HW_DEV_ID_MINIMUFFIN 2 #define USB_PD_HW_DEV_ID_DINGDONG 3 #define USB_PD_HW_DEV_ID_HOHO 4 #define USB_PD_HW_DEV_ID_HONEYBUNS 5 /* * ChromeOS specific VDO_CMD_READ_INFO responds with device info including: * RW Hash: First 20 bytes of SHA-256 of RW (20 bytes) * HW Device ID: unique descriptor for each ChromeOS model (2 bytes) * top 6 bits are minor revision, bottom 10 bits are major * SW Debug Version: Software version useful for debugging (15 bits) * IS RW: True if currently in RW, False otherwise (1 bit) */ #define VDO_INFO(id, id_minor, ver, is_rw) ((id_minor) << 26 \ | ((id) & 0x3ff) << 16 \ | ((ver) & 0x7fff) << 1 \ | ((is_rw) & 1)) #define VDO_INFO_HW_DEV_ID(x) ((x) >> 16) #define VDO_INFO_SW_DBG_VER(x) (((x) >> 1) & 0x7fff) #define VDO_INFO_IS_RW(x) ((x) & 1) #define HW_DEV_ID_MAJ(x) (x & 0x3ff) #define HW_DEV_ID_MIN(x) ((x) >> 10) /* USB-IF SIDs */ #define USB_SID_PD 0xff00 /* power delivery */ #define USB_SID_DISPLAYPORT 0xff01 #define USB_GOOGLE_TYPEC_URL "http://www.google.com/chrome/devices/typec" /* USB Vendor ID assigned to Google Inc. */ #define USB_VID_GOOGLE 0x18d1 /* Other Vendor IDs */ #define USB_VID_APPLE 0x05ac /* Timeout for message receive in microseconds */ #define USB_PD_RX_TMOUT_US 1800 /* --- Protocol layer functions --- */ enum pd_states { PD_STATE_DISABLED, PD_STATE_SUSPENDED, #ifdef CONFIG_USB_PD_DUAL_ROLE PD_STATE_SNK_DISCONNECTED, PD_STATE_SNK_DISCONNECTED_DEBOUNCE, PD_STATE_SNK_ACCESSORY, PD_STATE_SNK_HARD_RESET_RECOVER, PD_STATE_SNK_DISCOVERY, PD_STATE_SNK_REQUESTED, PD_STATE_SNK_TRANSITION, PD_STATE_SNK_READY, PD_STATE_SNK_SWAP_INIT, PD_STATE_SNK_SWAP_SNK_DISABLE, PD_STATE_SNK_SWAP_SRC_DISABLE, PD_STATE_SNK_SWAP_STANDBY, PD_STATE_SNK_SWAP_COMPLETE, #endif /* CONFIG_USB_PD_DUAL_ROLE */ PD_STATE_SRC_DISCONNECTED, PD_STATE_SRC_DISCONNECTED_DEBOUNCE, PD_STATE_SRC_ACCESSORY, PD_STATE_SRC_HARD_RESET_RECOVER, PD_STATE_SRC_STARTUP, PD_STATE_SRC_DISCOVERY, PD_STATE_SRC_NEGOCIATE, PD_STATE_SRC_ACCEPTED, PD_STATE_SRC_POWERED, PD_STATE_SRC_TRANSITION, PD_STATE_SRC_READY, PD_STATE_SRC_GET_SINK_CAP, PD_STATE_DR_SWAP, #ifdef CONFIG_USB_PD_DUAL_ROLE PD_STATE_SRC_SWAP_INIT, PD_STATE_SRC_SWAP_SNK_DISABLE, PD_STATE_SRC_SWAP_SRC_DISABLE, PD_STATE_SRC_SWAP_STANDBY, #ifdef CONFIG_USBC_VCONN_SWAP PD_STATE_VCONN_SWAP_SEND, PD_STATE_VCONN_SWAP_INIT, PD_STATE_VCONN_SWAP_READY, #endif /* CONFIG_USBC_VCONN_SWAP */ #endif /* CONFIG_USB_PD_DUAL_ROLE */ PD_STATE_SOFT_RESET, PD_STATE_HARD_RESET_SEND, PD_STATE_HARD_RESET_EXECUTE, #ifdef CONFIG_COMMON_RUNTIME PD_STATE_BIST_RX, PD_STATE_BIST_TX, #endif #ifdef CONFIG_USB_PD_DUAL_ROLE_AUTO_TOGGLE PD_STATE_DRP_AUTO_TOGGLE, #endif /* Number of states. Not an actual state. */ PD_STATE_COUNT, }; #define PD_FLAGS_PING_ENABLED BIT(0) /* SRC_READY pings enabled */ #define PD_FLAGS_PARTNER_DR_POWER BIT(1) /* port partner is dualrole power */ #define PD_FLAGS_PARTNER_DR_DATA BIT(2) /* port partner is dualrole data */ #define PD_FLAGS_CHECK_IDENTITY BIT(3) /* discover identity in READY */ #define PD_FLAGS_SNK_CAP_RECVD BIT(4) /* sink capabilities received */ #define PD_FLAGS_TCPC_DRP_TOGGLE BIT(5) /* TCPC-controlled DRP toggling */ #define PD_FLAGS_EXPLICIT_CONTRACT BIT(6) /* explicit pwr contract in place */ #define PD_FLAGS_VBUS_NEVER_LOW BIT(7) /* VBUS input has never been low */ #define PD_FLAGS_PREVIOUS_PD_CONN BIT(8) /* previously PD connected */ #define PD_FLAGS_CHECK_PR_ROLE BIT(9) /* check power role in READY */ #define PD_FLAGS_CHECK_DR_ROLE BIT(10)/* check data role in READY */ #define PD_FLAGS_PARTNER_EXTPOWER BIT(11)/* port partner has external pwr */ #define PD_FLAGS_VCONN_ON BIT(12)/* vconn is being sourced */ #define PD_FLAGS_TRY_SRC BIT(13)/* Try.SRC states are active */ #define PD_FLAGS_PARTNER_USB_COMM BIT(14)/* port partner is USB comms */ #define PD_FLAGS_UPDATE_SRC_CAPS BIT(15)/* send new source capabilities */ /* Flags to clear on a disconnect */ #define PD_FLAGS_RESET_ON_DISCONNECT_MASK (PD_FLAGS_PARTNER_DR_POWER | \ PD_FLAGS_PARTNER_DR_DATA | \ PD_FLAGS_CHECK_IDENTITY | \ PD_FLAGS_SNK_CAP_RECVD | \ PD_FLAGS_TCPC_DRP_TOGGLE | \ PD_FLAGS_EXPLICIT_CONTRACT | \ PD_FLAGS_PREVIOUS_PD_CONN | \ PD_FLAGS_CHECK_PR_ROLE | \ PD_FLAGS_CHECK_DR_ROLE | \ PD_FLAGS_PARTNER_EXTPOWER | \ PD_FLAGS_VCONN_ON | \ PD_FLAGS_TRY_SRC | \ PD_FLAGS_PARTNER_USB_COMM | \ PD_FLAGS_UPDATE_SRC_CAPS) enum pd_cc_states { PD_CC_NONE, /* From DFP perspective */ PD_CC_NO_UFP, PD_CC_AUDIO_ACC, PD_CC_DEBUG_ACC, PD_CC_UFP_ATTACHED, /* From UFP perspective */ PD_CC_DFP_ATTACHED }; #ifdef CONFIG_USB_PD_DUAL_ROLE enum pd_dual_role_states { PD_DRP_TOGGLE_ON, PD_DRP_TOGGLE_OFF, PD_DRP_FORCE_SINK, PD_DRP_FORCE_SOURCE, }; /** * Get dual role state * * @return Current dual-role state, from enum pd_dual_role_states */ enum pd_dual_role_states pd_get_dual_role(void); /** * Set dual role state, from among enum pd_dual_role_states * * @param state New state of dual-role port, selected from * enum pd_dual_role_states */ void pd_set_dual_role(enum pd_dual_role_states state); /** * Get role, from among PD_ROLE_SINK and PD_ROLE_SOURCE * * @param port Port number from which to get role */ int pd_get_role(int port); #endif /* Control Message type */ enum pd_ctrl_msg_type { /* 0 Reserved */ PD_CTRL_GOOD_CRC = 1, PD_CTRL_GOTO_MIN = 2, PD_CTRL_ACCEPT = 3, PD_CTRL_REJECT = 4, PD_CTRL_PING = 5, PD_CTRL_PS_RDY = 6, PD_CTRL_GET_SOURCE_CAP = 7, PD_CTRL_GET_SINK_CAP = 8, PD_CTRL_DR_SWAP = 9, PD_CTRL_PR_SWAP = 10, PD_CTRL_VCONN_SWAP = 11, PD_CTRL_WAIT = 12, PD_CTRL_SOFT_RESET = 13, /* 14-15 Reserved */ }; /* Data message type */ enum pd_data_msg_type { /* 0 Reserved */ PD_DATA_SOURCE_CAP = 1, PD_DATA_REQUEST = 2, PD_DATA_BIST = 3, PD_DATA_SINK_CAP = 4, /* 5-14 Reserved */ PD_DATA_VENDOR_DEF = 15, }; /* Protocol revision */ #define PD_REV10 0 #define PD_REV20 1 /* Power role */ #define PD_ROLE_SINK 0 #define PD_ROLE_SOURCE 1 /* Data role */ #define PD_ROLE_UFP 0 #define PD_ROLE_DFP 1 /* Vconn role */ #define PD_ROLE_VCONN_OFF 0 #define PD_ROLE_VCONN_ON 1 /* Port role at startup */ #ifndef PD_ROLE_DEFAULT #ifdef CONFIG_USB_PD_DUAL_ROLE #define PD_ROLE_DEFAULT(port) PD_ROLE_SINK #else #define PD_ROLE_DEFAULT(port) PD_ROLE_SOURCE #endif #endif /* Port default state at startup */ #ifdef CONFIG_USB_PD_DUAL_ROLE #define PD_DEFAULT_STATE(port) ((PD_ROLE_DEFAULT(port) == PD_ROLE_SOURCE) ? \ PD_STATE_SRC_DISCONNECTED : \ PD_STATE_SNK_DISCONNECTED) #else #define PD_DEFAULT_STATE(port) PD_STATE_SRC_DISCONNECTED #endif /* build message header */ #define PD_HEADER(type, prole, drole, id, cnt) \ ((type) | (PD_REV20 << 6) | \ ((drole) << 5) | ((prole) << 8) | \ ((id) << 9) | ((cnt) << 12)) #define PD_HEADER_CNT(header) (((header) >> 12) & 7) #define PD_HEADER_TYPE(header) ((header) & 0xF) #define PD_HEADER_ID(header) (((header) >> 9) & 7) /* K-codes for special symbols */ #define PD_SYNC1 0x18 #define PD_SYNC2 0x11 #define PD_SYNC3 0x06 #define PD_RST1 0x07 #define PD_RST2 0x19 #define PD_EOP 0x0D /* Minimum PD supply current (mA) */ #define PD_MIN_MA 500 /* Minimum PD voltage (mV) */ #define PD_MIN_MV 5000 /* No connect voltage threshold for sources based on Rp */ #define PD_SRC_DEF_VNC_MV 1600 #define PD_SRC_1_5_VNC_MV 1600 #define PD_SRC_3_0_VNC_MV 2600 /* Rd voltage threshold for sources based on Rp */ #define PD_SRC_DEF_RD_THRESH_MV 200 #define PD_SRC_1_5_RD_THRESH_MV 400 #define PD_SRC_3_0_RD_THRESH_MV 800 /* Voltage threshold to detect connection when presenting Rd */ #define PD_SNK_VA_MV 250 /* --- Policy layer functions --- */ /* Request types for pd_build_request() */ enum pd_request_type { PD_REQUEST_VSAFE5V, PD_REQUEST_MAX, }; /** * Decide which PDO to choose from the source capabilities. * * @param cnt the number of Power Data Objects. * @param src_caps Power Data Objects representing the source capabilities. * @param rdo requested Request Data Object. * @param ma selected current limit (stored on success) * @param mv selected supply voltage (stored on success) * @param req_type request type * @return <0 if invalid, else EC_SUCCESS */ int pd_build_request(int cnt, uint32_t *src_caps, uint32_t *rdo, uint32_t *ma, uint32_t *mv, enum pd_request_type req_type); /** * Check if max voltage request is allowed (only used if * CONFIG_USB_PD_CHECK_MAX_REQUEST_ALLOWED is defined). * * @return True if max voltage request allowed, False otherwise */ int pd_is_max_request_allowed(void); /** * Process source capabilities packet * * @param port USB-C port number * @param cnt the number of Power Data Objects. * @param src_caps Power Data Objects representing the source capabilities. */ void pd_process_source_cap(int port, int cnt, uint32_t *src_caps); /** * Reduce the sink power consumption to a minimum value. * * @param port USB-C port number * @param ma reduce current to minimum value. * @param mv reduce voltage to minimum value. */ void pd_snk_give_back(int port, uint32_t * const ma, uint32_t * const mv); /** * Put a cap on the max voltage requested as a sink. * @param mv maximum voltage in millivolts. */ void pd_set_max_voltage(unsigned mv); /** * Get the max voltage that can be requested as set by pd_set_max_voltage(). * @return max voltage */ unsigned pd_get_max_voltage(void); /** * Check if this board supports the given input voltage. * * @mv input voltage * @return 1 if voltage supported, 0 if not */ int pd_is_valid_input_voltage(int mv); /** * Request a new operating voltage. * * @param rdo Request Data Object with the selected operating point. * @return EC_SUCCESS if we can get the requested voltage/OP, <0 else. */ int pd_check_requested_voltage(uint32_t rdo); /** * Run board specific checks on request message * * @param rdo the request data object word sent by the sink. * @param pdo_cnt the total number of source PDOs. * @return EC_SUCCESS if request is ok , <0 else. */ int pd_board_check_request(uint32_t rdo, int pdo_cnt); /** * Select a new output voltage. * * param idx index of the new voltage in the source PDO table. */ void pd_transition_voltage(int idx); /** * Go back to the default/safe state of the power supply * * @param port USB-C port number */ void pd_power_supply_reset(int port); /** * Enable or disable VBUS discharge for a given port. * * @param port USB-C port number * @enable 1 if enabling discharge, 0 if disabling */ void pd_set_vbus_discharge(int port, int enable); /** * Enable the power supply output after the ready delay. * * @param port USB-C port number * @return EC_SUCCESS if the power supply is ready, <0 else. */ int pd_set_power_supply_ready(int port); /** * Ask the specified voltage from the PD source. * * It triggers a new negotiation sequence with the source. * @param port USB-C port number * @param mv request voltage in millivolts. */ void pd_request_source_voltage(int port, int mv); /** * Set a voltage limit from the PD source. * * If the source is currently active, it triggers a new negotiation. * @param port USB-C port number * @param mv limit voltage in millivolts. */ void pd_set_external_voltage_limit(int port, int mv); /** * Set the PD input current limit. * * @param port USB-C port number * @param max_ma Maximum current limit * @param supply_voltage Voltage at which current limit is applied */ void pd_set_input_current_limit(int port, uint32_t max_ma, uint32_t supply_voltage); /** * Update the power contract if it exists. * * @param port USB-C port number. */ void pd_update_contract(int port); /** * Set the type-C input current limit. * * @param port USB-C port number * @param max_ma Maximum current limit * @param supply_voltage Voltage at which current limit is applied */ void typec_set_input_current_limit(int port, uint32_t max_ma, uint32_t supply_voltage); /** * Set the type-C current limit when sourcing current.. * * @param port USB-C port number * @param rp One of enum tcpc_rp_value (eg TYPEC_RP_3A0) defining the limit. */ void typec_set_source_current_limit(int port, int rp); /** * Verify board specific health status : current, voltages... * * @return EC_SUCCESS if the board is good, <0 else. */ int pd_board_checks(void); /** * Return if VBUS is detected on type-C port * * @param port USB-C port number * @return VBUS is detected */ int pd_snk_is_vbus_provided(int port); /** * Notify PD protocol that VBUS has gone low * * @param port USB-C port number */ void pd_vbus_low(int port); /** * Check if power swap is allowed. * * @param port USB-C port number * @return True if power swap is allowed, False otherwise */ int pd_check_power_swap(int port); /** * Check if data swap is allowed. * * @param port USB-C port number * @param data_role current data role * @return True if data swap is allowed, False otherwise */ int pd_check_data_swap(int port, int data_role); /** * Check if vconn swap is allowed. * * @param port USB-C port number * @return True if vconn swap is allowed, False otherwise */ int pd_check_vconn_swap(int port); /** * Check current power role for potential power swap * * @param port USB-C port number * @param pr_role Our power role * @param flags PD flags */ void pd_check_pr_role(int port, int pr_role, int flags); /** * Check current data role for potential data swap * * @param port USB-C port number * @param dr_role Our data role * @param flags PD flags */ void pd_check_dr_role(int port, int dr_role, int flags); /** * Check if we should charge from this device. This is * basically a white-list for chargers that are dual-role, * don't set the externally powered bit, but we should charge * from by default. * * @param vid Port partner Vendor ID * @param pid Port partner Product ID */ int pd_charge_from_device(uint16_t vid, uint16_t pid); /** * Execute data swap. * * @param port USB-C port number * @param data_role new data role */ void pd_execute_data_swap(int port, int data_role); /** * Get PD device info used for VDO_CMD_SEND_INFO / VDO_CMD_READ_INFO * * @param info_data pointer to info data array */ void pd_get_info(uint32_t *info_data); /** * Handle Vendor Defined Messages * * @param port USB-C port number * @param cnt number of data objects in the payload. * @param payload payload data. * @param rpayload pointer to the data to send back. * @return if >0, number of VDOs to send back. */ int pd_custom_vdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload); /** * Handle Structured Vendor Defined Messages * * @param port USB-C port number * @param cnt number of data objects in the payload. * @param payload payload data. * @param rpayload pointer to the data to send back. * @return if >0, number of VDOs to send back. */ int pd_svdm(int port, int cnt, uint32_t *payload, uint32_t **rpayload); /** * Handle Custom VDMs for flashing. * * @param port USB-C port number * @param cnt number of data objects in the payload. * @param payload payload data. * @return if >0, number of VDOs to send back. */ int pd_custom_flash_vdm(int port, int cnt, uint32_t *payload); /** * Enter alternate mode on DFP * * @param port USB-C port number * @param svid USB standard or vendor id to exit or zero for DFP amode reset. * @param opos object position of mode to exit. * @return vdm for UFP to be sent to enter mode or zero if not. */ uint32_t pd_dfp_enter_mode(int port, uint16_t svid, int opos); /** * Get DisplayPort pin mode for DFP to request from UFP's capabilities. * * @param port USB-C port number. * @param status DisplayPort Status VDO. * @return one-hot PIN config to request. */ int pd_dfp_dp_get_pin_mode(int port, uint32_t status); /** * Exit alternate mode on DFP * * @param port USB-C port number * @param svid USB standard or vendor id to exit or zero for DFP amode reset. * @param opos object position of mode to exit. * @return 1 if UFP should be sent exit mode VDM. */ int pd_dfp_exit_mode(int port, uint16_t svid, int opos); /** * Initialize policy engine for DFP * * @param port USB-C port number */ void pd_dfp_pe_init(int port); /** * Return the VID of the USB PD accessory connected to a specified port * * @param port USB-C port number * @return the USB Vendor Identifier or 0 if it doesn't exist */ uint16_t pd_get_identity_vid(int port); /** * Return the PID of the USB PD accessory connected to a specified port * * @param port USB-C port number * @return the USB Product Identifier or 0 if it doesn't exist */ uint16_t pd_get_identity_pid(int port); /** * Store Device ID & RW hash of device * * @param port USB-C port number * @param dev_id device identifier * @param rw_hash pointer to rw_hash * @param current_image current image: RW or RO * @return true if the dev / hash match an existing hash * in our table, false otherwise */ int pd_dev_store_rw_hash(int port, uint16_t dev_id, uint32_t *rw_hash, uint32_t ec_current_image); /** * Try to fetch one PD log entry from accessory * * @param port USB-C accessory port number * @return EC_RES_SUCCESS if the VDM was sent properly else error code */ int pd_fetch_acc_log_entry(int port); /** * Analyze the log entry received as the VDO_CMD_GET_LOG payload. * * @param port USB-C accessory port number * @param cnt number of data objects in payload * @param payload payload data */ void pd_log_recv_vdm(int port, int cnt, uint32_t *payload); /** * Send Vendor Defined Message * * @param port USB-C port number * @param vid Vendor ID * @param cmd VDO command number * @param data Pointer to payload to send * @param count number of data objects in payload */ void pd_send_vdm(int port, uint32_t vid, int cmd, const uint32_t *data, int count); /* Power Data Objects for the source and the sink */ extern const uint32_t pd_src_pdo[]; extern const int pd_src_pdo_cnt; extern const uint32_t pd_src_pdo_max[]; extern const int pd_src_pdo_max_cnt; extern const uint32_t pd_snk_pdo[]; extern const int pd_snk_pdo_cnt; /** * Request that a host event be sent to notify the AP of a PD power event. * * @param mask host event mask. */ void pd_send_host_event(int mask); /** * Determine if in alternate mode or not. * * @param port port number. * @param svid USB standard or vendor id * @return object position of mode chosen in alternate mode otherwise zero. */ int pd_alt_mode(int port, uint16_t svid); /** * Send hpd over USB PD. * * @param port port number. * @param hpd hotplug detect type. */ void pd_send_hpd(int port, enum hpd_event hpd); /** * Enable USB Billboard Device. */ extern const struct deferred_data pd_usb_billboard_deferred_data; /* --- Physical layer functions : chip specific --- */ /* Packet preparation/retrieval */ /** * Prepare packet reading state machine. * * @param port USB-C port number */ void pd_init_dequeue(int port); /** * Prepare packet reading state machine. * * @param port USB-C port number * @param off current position in the packet buffer. * @param len minimum size to read in bits. * @param val the read bits. * @return new position in the packet buffer. */ int pd_dequeue_bits(int port, int off, int len, uint32_t *val); /** * Advance until the end of the preamble. * * @param port USB-C port number * @return new position in the packet buffer. */ int pd_find_preamble(int port); /** * Write the preamble in the TX buffer. * * @param port USB-C port number * @return new position in the packet buffer. */ int pd_write_preamble(int port); /** * Write one 10-period symbol in the TX packet. * corresponding to a quartet with 4b5b encoding * and Biphase Mark Coding. * * @param port USB-C port number * @param bit_off current position in the packet buffer. * @param val10 the 10-bit integer. * @return new position in the packet buffer. */ int pd_write_sym(int port, int bit_off, uint32_t val10); /** * Ensure that we have an edge after EOP and we end up at level 0, * also fill the last byte. * * @param port USB-C port number * @param bit_off current position in the packet buffer. * @return new position in the packet buffer. */ int pd_write_last_edge(int port, int bit_off); /** * Do 4B5B encoding on a 32-bit word. * * @param port USB-C port number * @param off current offset in bits inside the message * @param val32 32-bit word value to encode * @return new offset in the message in bits. */ int encode_word(int port, int off, uint32_t val32); /** * Ensure that we have an edge after EOP and we end up at level 0, * also fill the last byte. * * @param port USB-C port number * @param header PD packet header * @param cnt number of payload words * @param data payload content * @return length of the message in bits. */ int prepare_message(int port, uint16_t header, uint8_t cnt, const uint32_t *data); /** * Dump the current PD packet on the console for debug. * * @param port USB-C port number * @param msg context string. */ void pd_dump_packet(int port, const char *msg); /** * Change the TX data clock frequency. * * @param port USB-C port number * @param freq frequency in hertz. */ void pd_set_clock(int port, int freq); /* TX/RX callbacks */ /** * Start sending over the wire the prepared packet. * * @param port USB-C port number * @param polarity plug polarity (0=CC1, 1=CC2). * @param bit_len size of the packet in bits. * @return length transmitted or negative if error */ int pd_start_tx(int port, int polarity, int bit_len); /** * Set PD TX DMA to use circular mode. Call this before pd_start_tx() to * continually loop over the transmit buffer given in pd_start_tx(). * * @param port USB-C port number */ void pd_tx_set_circular_mode(int port); /** * Stop PD TX DMA circular mode transaction already in progress. * * @param port USB-C port number */ void pd_tx_clear_circular_mode(int port); /** * Call when we are done sending a packet. * * @param port USB-C port number * @param polarity plug polarity (0=CC1, 1=CC2). */ void pd_tx_done(int port, int polarity); /** * Check whether the PD reception is started. * * @param port USB-C port number * @return true if the reception is on-going. */ int pd_rx_started(int port); /** * Suspend the PD task. * @param port USB-C port number * @param enable pass 0 to resume, anything else to suspend */ void pd_set_suspend(int port, int enable); /* Callback when the hardware has detected an incoming packet */ void pd_rx_event(int port); /* Start sampling the CC line for reception */ void pd_rx_start(int port); /* Call when we are done reading a packet */ void pd_rx_complete(int port); /* restart listening to the CC wire */ void pd_rx_enable_monitoring(int port); /* stop listening to the CC wire during transmissions */ void pd_rx_disable_monitoring(int port); /* get time since last RX edge interrupt */ uint64_t get_time_since_last_edge(int port); /** * Deinitialize the hardware used for PD. * * @param port USB-C port number */ void pd_hw_release(int port); /** * Initialize the hardware used for PD RX/TX. * * @param port USB-C port number * @param role Role to initialize pins in */ void pd_hw_init(int port, int role); /** * Initialize the reception side of hardware used for PD. * * This is a subset of pd_hw_init() including only : * the comparators + the RX edge delay timer + the RX DMA. * * @param port USB-C port number */ void pd_hw_init_rx(int port); /* --- Protocol layer functions --- */ /** * Decode a raw packet in the RX buffer. * * @param port USB-C port number * @param payload buffer to store the packet payload (must be 7x 32-bit) * @return the packet header or <0 in case of error */ int pd_analyze_rx(int port, uint32_t *payload); /** * Get connected state * * @param port USB-C port number * @return True if port is in connected state */ int pd_is_connected(int port); /** * Execute a hard reset * * @param port USB-C port number */ void pd_execute_hard_reset(int port); /** * Signal to protocol layer that PD transmit is complete * * @param port USB-C port number * @param status status of the transmission */ void pd_transmit_complete(int port, int status); /** * Get port polarity. * * @param port USB-C port number */ int pd_get_polarity(int port); /** * Get port partner data swap capable status * * @param port USB-C port number */ int pd_get_partner_data_swap_capable(int port); /** * Request power swap command to be issued * * @param port USB-C port number */ void pd_request_power_swap(int port); /** * Try to become the VCONN source, if we are not already the source and the * other side is willing to accept a VCONN swap. * * @param port USB-C port number */ void pd_try_vconn_src(int port); /** * Request data swap command to be issued * * @param port USB-C port number */ void pd_request_data_swap(int port); /** * Set the PD communication enabled flag. When communication is disabled, * the port can still detect connection and source power but will not * send or respond to any PD communication. * * @param enable Enable flag to set */ void pd_comm_enable(int enable); /** * Set the PD pings enabled flag. When source has negotiated power over * PD successfully, it can optionally send pings periodically based on * this enable flag. * * @param port USB-C port number * @param enable Enable flag to set */ void pd_ping_enable(int port, int enable); /* Issue PD soft reset */ void pd_soft_reset(void); /* Prepare PD communication for reset */ void pd_prepare_reset(void); /** * Signal power request to indicate a charger update that affects the port. * * @param port USB-C port number */ void pd_set_new_power_request(int port); /* ----- Logging ----- */ #ifdef CONFIG_USB_PD_LOGGING /** * Record one event in the PD logging FIFO. * * @param type event type as defined by PD_EVENT_xx in ec_commands.h * @param size_port payload size and port num (defined by PD_LOG_PORT_SIZE) * @param data type-defined information * @param payload pointer to the optional payload (0..16 bytes) */ void pd_log_event(uint8_t type, uint8_t size_port, uint16_t data, void *payload); /** * Retrieve one logged event and prepare a VDM with it. * * Used to answer the VDO_CMD_GET_LOG unstructured VDM. * * @param payload pointer to the payload data buffer (must be 7 words) * @return number of 32-bit words in the VDM payload. */ int pd_vdm_get_log_entry(uint32_t *payload); #else /* CONFIG_USB_PD_LOGGING */ static inline void pd_log_event(uint8_t type, uint8_t size_port, uint16_t data, void *payload) {} static inline int pd_vdm_get_log_entry(uint32_t *payload) { return 0; } #endif /* CONFIG_USB_PD_LOGGING */ #endif /* __CROS_EC_USB_PD_H */