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/*
* 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
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 {
const u32 *src_pdo;
unsigned int nr_src_pdo;
const u32 *snk_pdo;
unsigned int nr_snk_pdo;
unsigned int max_snk_mv;
unsigned int max_snk_ma;
unsigned int max_snk_mw;
unsigned int operating_snk_mw;
enum typec_port_type type;
enum typec_role default_role;
bool try_role_hw; /* try.{src,snk} implemented in hardware */
struct typec_altmode_desc *alt_modes;
};
enum tcpc_usb_switch {
TCPC_USB_SWITCH_CONNECT,
TCPC_USB_SWITCH_DISCONNECT,
TCPC_USB_SWITCH_RESTORE, /* TODO FIXME */
};
/* 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 */
/* Mux modes, decoded to attributes */
enum tcpc_mux_mode {
TYPEC_MUX_NONE = 0, /* Open switch */
TYPEC_MUX_USB = TCPC_MUX_USB_ENABLED, /* USB only */
TYPEC_MUX_DP = TCPC_MUX_DP_ENABLED, /* DP only */
TYPEC_MUX_DOCK = TCPC_MUX_USB_ENABLED | /* Both USB and DP */
TCPC_MUX_DP_ENABLED,
};
struct tcpc_mux_dev {
int (*set)(struct tcpc_mux_dev *dev, enum tcpc_mux_mode mux_mode,
enum tcpc_usb_switch usb_config,
enum typec_cc_polarity polarity);
bool dfp_only;
void *priv_data;
};
struct tcpc_dev {
const struct tcpc_config *config;
int (*init)(struct tcpc_dev *dev);
int (*get_vbus)(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_drp_toggling)(struct tcpc_dev *dev,
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 tcpc_mux_dev *mux;
};
struct tcpm_port;
struct tcpm_port *tcpm_register_port(struct device *dev, struct tcpc_dev *tcpc);
void tcpm_unregister_port(struct tcpm_port *port);
void tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
unsigned int nr_pdo);
void tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
unsigned int nr_pdo,
unsigned int max_snk_mv,
unsigned int max_snk_ma,
unsigned int max_snk_mw,
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 */
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