179 lines
5.8 KiB
C
Executable file
179 lines
5.8 KiB
C
Executable file
/*
|
|
* Copyright 2015-2017 Google, Inc
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef __LINUX_USB_TCPM_H
|
|
#define __LINUX_USB_TCPM_H
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/usb/typec.h>
|
|
#include "pd.h"
|
|
|
|
enum typec_cc_status {
|
|
TYPEC_CC_OPEN,
|
|
TYPEC_CC_RA,
|
|
TYPEC_CC_RD,
|
|
TYPEC_CC_RP_DEF,
|
|
TYPEC_CC_RP_1_5,
|
|
TYPEC_CC_RP_3_0,
|
|
};
|
|
|
|
enum typec_cc_polarity {
|
|
TYPEC_POLARITY_CC1,
|
|
TYPEC_POLARITY_CC2,
|
|
};
|
|
|
|
/* Time to wait for TCPC to complete transmit */
|
|
#define PD_T_TCPC_TX_TIMEOUT 100 /* in ms */
|
|
#define PD_ROLE_SWAP_TIMEOUT (MSEC_PER_SEC * 10)
|
|
#define PD_PPS_CTRL_TIMEOUT (MSEC_PER_SEC * 10)
|
|
|
|
enum tcpm_transmit_status {
|
|
TCPC_TX_SUCCESS = 0,
|
|
TCPC_TX_DISCARDED = 1,
|
|
TCPC_TX_FAILED = 2,
|
|
};
|
|
|
|
enum tcpm_transmit_type {
|
|
TCPC_TX_SOP = 0,
|
|
TCPC_TX_SOP_PRIME = 1,
|
|
TCPC_TX_SOP_PRIME_PRIME = 2,
|
|
TCPC_TX_SOP_DEBUG_PRIME = 3,
|
|
TCPC_TX_SOP_DEBUG_PRIME_PRIME = 4,
|
|
TCPC_TX_HARD_RESET = 5,
|
|
TCPC_TX_CABLE_RESET = 6,
|
|
TCPC_TX_BIST_MODE_2 = 7
|
|
};
|
|
|
|
/**
|
|
* struct tcpc_config - Port configuration
|
|
* @src_pdo: PDO parameters sent to port partner as response to
|
|
* PD_CTRL_GET_SOURCE_CAP message
|
|
* @nr_src_pdo: Number of entries in @src_pdo
|
|
* @snk_pdo: PDO parameters sent to partner as response to
|
|
* PD_CTRL_GET_SINK_CAP message
|
|
* @nr_snk_pdo: Number of entries in @snk_pdo
|
|
* @operating_snk_mw:
|
|
* Required operating sink power in mW
|
|
* @type: Port type (TYPEC_PORT_DFP, TYPEC_PORT_UFP, or
|
|
* TYPEC_PORT_DRP)
|
|
* @default_role:
|
|
* Default port role (TYPEC_SINK or TYPEC_SOURCE).
|
|
* Set to TYPEC_NO_PREFERRED_ROLE if no default role.
|
|
* @try_role_hw:True if try.{Src,Snk} is implemented in hardware
|
|
* @alt_modes: List of supported alternate modes
|
|
*/
|
|
struct tcpc_config {
|
|
const u32 *src_pdo;
|
|
unsigned int nr_src_pdo;
|
|
|
|
const u32 *snk_pdo;
|
|
unsigned int nr_snk_pdo;
|
|
|
|
const u32 *snk_vdo;
|
|
unsigned int nr_snk_vdo;
|
|
|
|
unsigned int operating_snk_mw;
|
|
|
|
enum typec_port_type type;
|
|
enum typec_port_data data;
|
|
enum typec_role default_role;
|
|
bool try_role_hw; /* try.{src,snk} implemented in hardware */
|
|
bool self_powered; /* port belongs to a self powered device */
|
|
|
|
const struct typec_altmode_desc *alt_modes;
|
|
};
|
|
|
|
/* Mux state attributes */
|
|
#define TCPC_MUX_USB_ENABLED BIT(0) /* USB enabled */
|
|
#define TCPC_MUX_DP_ENABLED BIT(1) /* DP enabled */
|
|
#define TCPC_MUX_POLARITY_INVERTED BIT(2) /* Polarity inverted */
|
|
|
|
/**
|
|
* struct tcpc_dev - Port configuration and callback functions
|
|
* @config: Pointer to port configuration
|
|
* @fwnode: Pointer to port fwnode
|
|
* @get_vbus: Called to read current VBUS state
|
|
* @get_current_limit:
|
|
* Optional; called by the tcpm core when configured as a snk
|
|
* and cc=Rp-def. This allows the tcpm to provide a fallback
|
|
* current-limit detection method for the cc=Rp-def case.
|
|
* For example, some tcpcs may include BC1.2 charger detection
|
|
* and use that in this case.
|
|
* @set_cc: Called to set value of CC pins
|
|
* @get_cc: Called to read current CC pin values
|
|
* @set_polarity:
|
|
* Called to set polarity
|
|
* @set_vconn: Called to enable or disable VCONN
|
|
* @set_vbus: Called to enable or disable VBUS
|
|
* @set_current_limit:
|
|
* Optional; called to set current limit as negotiated
|
|
* with partner.
|
|
* @set_pd_rx: Called to enable or disable reception of PD messages
|
|
* @set_roles: Called to set power and data roles
|
|
* @start_toggling:
|
|
* Optional; if supported by hardware, called to start dual-role
|
|
* toggling or single-role connection detection. Toggling stops
|
|
* automatically if a connection is established.
|
|
* @try_role: Optional; called to set a preferred role
|
|
* @pd_transmit:Called to transmit PD message
|
|
* @mux: Pointer to multiplexer data
|
|
*/
|
|
struct tcpc_dev {
|
|
const struct tcpc_config *config;
|
|
struct fwnode_handle *fwnode;
|
|
|
|
int (*init)(struct tcpc_dev *dev);
|
|
int (*get_vbus)(struct tcpc_dev *dev);
|
|
int (*get_current_limit)(struct tcpc_dev *dev);
|
|
int (*set_cc)(struct tcpc_dev *dev, enum typec_cc_status cc);
|
|
int (*get_cc)(struct tcpc_dev *dev, enum typec_cc_status *cc1,
|
|
enum typec_cc_status *cc2);
|
|
int (*set_polarity)(struct tcpc_dev *dev,
|
|
enum typec_cc_polarity polarity);
|
|
int (*set_vconn)(struct tcpc_dev *dev, bool on);
|
|
int (*set_vbus)(struct tcpc_dev *dev, bool on, bool charge);
|
|
int (*set_current_limit)(struct tcpc_dev *dev, u32 max_ma, u32 mv);
|
|
int (*set_pd_rx)(struct tcpc_dev *dev, bool on);
|
|
int (*set_roles)(struct tcpc_dev *dev, bool attached,
|
|
enum typec_role role, enum typec_data_role data);
|
|
int (*start_toggling)(struct tcpc_dev *dev,
|
|
enum typec_port_type port_type,
|
|
enum typec_cc_status cc);
|
|
int (*try_role)(struct tcpc_dev *dev, int role);
|
|
int (*pd_transmit)(struct tcpc_dev *dev, enum tcpm_transmit_type type,
|
|
const struct pd_message *msg);
|
|
};
|
|
|
|
struct tcpm_port;
|
|
|
|
struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc);
|
|
void tcpm_unregister_port(struct tcpm_port *port);
|
|
|
|
int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
|
|
unsigned int nr_pdo);
|
|
int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
|
|
unsigned int nr_pdo,
|
|
unsigned int operating_snk_mw);
|
|
|
|
void tcpm_vbus_change(struct tcpm_port *port);
|
|
void tcpm_cc_change(struct tcpm_port *port);
|
|
void tcpm_pd_receive(struct tcpm_port *port,
|
|
const struct pd_message *msg);
|
|
void tcpm_pd_transmit_complete(struct tcpm_port *port,
|
|
enum tcpm_transmit_status status);
|
|
void tcpm_pd_hard_reset(struct tcpm_port *port);
|
|
void tcpm_tcpc_reset(struct tcpm_port *port);
|
|
|
|
#endif /* __LINUX_USB_TCPM_H */
|