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