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OpenCellular/include/usb_pd.h
Shawn Nematbakhsh 1ef8c7dc20 usb_mux: Add driver interface for USB-C muxes 
In preparation for adding support for additional USB-C mux chips, add a
new high-level USB-C mux interface usb_mux.c. usb_mux functions are now
called from pd code instead of board-level functions. usb_mux calls down
into a mux chip-specific driver (currently pi3usb30532) or
board-specific drivers which toggle GPIOs (for legacy boards).

BUG=chrome-os-partner:41696
TEST=Manual on Glados in subsequent commit. Verify set() and get()
functions set and return consistent values. Verify that USB SS device
functions when muxes are set to dock or USB. Also, verify that DP
dongle and USB SS device are functional on both PD ports on samus_pd.
BRANCH=None

Change-Id: Ib6477f489310f3be1430585ea09fea26f57e3752
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/281435
Reviewed-by: Alec Berg <alecaberg@chromium.org>
2015-06-30 17:18:37 +00:00

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/* 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.
*/
#if CONFIG_USB_PD_PORT_COUNT == 1
#ifdef HAS_TASK_PD
#define PD_PORT_TO_TASK_ID(port) TASK_ID_PD
#else
#define PD_PORT_TO_TASK_ID(port) -1 /* dummy task ID */
#endif
#define TASK_ID_TO_PD_PORT(id) 0
#elif CONFIG_USB_PD_PORT_COUNT == 2
#define PD_PORT_TO_TASK_ID(port) ((port) ? TASK_ID_PD_C1 : TASK_ID_PD_C0)
#define TASK_ID_TO_PD_PORT(id) ((id) == TASK_ID_PD_C0 ? 0 : 1)
#endif
#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 */
};
/* incoming/outgoing packet event (for the USB PD task) */
#define PD_EVENT_RX (1<<2)
#define PD_EVENT_TX (1<<3)
/* CC line change event */
#define PD_EVENT_CC (1<<4)
/* --- 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 (1 << 30)
#define PDO_TYPE_VARIABLE (2 << 30)
#define PDO_TYPE_MASK (3 << 30)
#define PDO_FIXED_DUAL_ROLE (1 << 29) /* Dual role device */
#define PDO_FIXED_SUSPEND (1 << 28) /* USB Suspend supported */
#define PDO_FIXED_EXTERNAL (1 << 27) /* Externally powered */
#define PDO_FIXED_COMM_CAP (1 << 26) /* USB Communications Capable */
#define PDO_FIXED_DATA_SWAP (1 << 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 (1 << 27)
#define RDO_CAP_MISMATCH (1 << 26)
#define RDO_COMM_CAP (1 << 25)
#define RDO_NO_SUSPEND (1 << 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 (1 << 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 (240*MSEC) /* between 210ms and 250ms */
#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 (15*MSEC) /* between 10ms and 20ms */
#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 */
/* 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 <board>/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 (1 << 0) /* Display port mode is on */
#define DP_FLAGS_HPD_HI_PENDING (1 << 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 (1 << 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 (1 << 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 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> : sink pin assignment supported
* <15:8> : source 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_VDO_MODE_DP_SNKP(x) (((x) >> 16) & 0x3f)
#define PD_VDO_MODE_DP_SRCP(x) (((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_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
/* Number of states. Not an actual state. */
PD_STATE_COUNT,
};
#define PD_FLAGS_PING_ENABLED (1 << 0) /* SRC_READY pings enabled */
#define PD_FLAGS_PARTNER_DR_POWER (1 << 1) /* port partner is dualrole power */
#define PD_FLAGS_PARTNER_DR_DATA (1 << 2) /* port partner is dualrole data */
#define PD_FLAGS_DATA_SWAPPED (1 << 3) /* data swap complete */
#define PD_FLAGS_SNK_CAP_RECVD (1 << 4) /* sink capabilities received */
#define PD_FLAGS_GET_SNK_CAP_SENT (1 << 5) /* get sink cap sent */
#define PD_FLAGS_EXPLICIT_CONTRACT (1 << 6) /* explicit pwr contract in place */
#define PD_FLAGS_SFT_RST_DIS_COMM (1 << 7) /* disable comms after soft reset */
#define PD_FLAGS_PREVIOUS_PD_CONN (1 << 8) /* previously PD connected */
#define PD_FLAGS_CHECK_PR_ROLE (1 << 9) /* check power role in READY */
#define PD_FLAGS_CHECK_DR_ROLE (1 << 10)/* check data role in READY */
#define PD_FLAGS_PARTNER_EXTPOWER (1 << 11)/* port partner has external pwr */
#define PD_FLAGS_VCONN_ON (1 << 12)/* vconn is being sourced */
/* 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_DATA_SWAPPED | \
PD_FLAGS_SNK_CAP_RECVD | \
PD_FLAGS_GET_SNK_CAP_SENT | \
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)
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 */
#ifdef CONFIG_USB_PD_DUAL_ROLE
#define PD_ROLE_DEFAULT PD_ROLE_SINK
#else
#define PD_ROLE_DEFAULT PD_ROLE_SOURCE
#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);
/**
* 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);
/**
* 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 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 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);
/**
* 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);
/**
* 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);
/**
* 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_snk_pdo[];
extern const int pd_snk_pdo_cnt;
/**
* Get PD source power data objects.
*
* @param src_pdo pointer to the data to return.
* @return number of PDOs returned.
*/
int pd_get_source_pdo(const uint32_t **src_pdo);
enum usb_switch {
USB_SWITCH_CONNECT,
USB_SWITCH_DISCONNECT,
USB_SWITCH_RESTORE,
};
/**
* Configure USB data switches on type-C port.
*
* @param port port number.
* @param setting new switch setting to configure.
*/
void board_set_usb_switches(int port, enum usb_switch setting);
/**
* 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.
*/
void pd_usb_billboard_deferred(void);
/* --- 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);
/**
* 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 sysjump */
void pd_prepare_sysjump(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 */
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