tcpci_priv.h File Reference

Helper functions to use by the TCPCI-compliant drivers. More...

#include <stdint.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/usb_c/usbc.h>

Go to the source code of this file.

Data Structures
struct	tcpci_reg_dump_map
	Structure used to bind the register address to name in registers dump. More...

Macros
#define	TCPCI_STD_REGS_SIZE   38
	Size of the array containing the standard registers used by tcpci dump command.

Functions
int	tcpci_read_reg8 (const struct i2c_dt_spec *bus, uint8_t reg, uint8_t *value)
	Function to read the 8-bit register of TCPCI device.
int	tcpci_write_reg8 (const struct i2c_dt_spec *bus, uint8_t reg, uint8_t value)
	Function to write a value to the 8-bit register of TCPCI device.
int	tcpci_update_reg8 (const struct i2c_dt_spec *bus, uint8_t reg, uint8_t mask, uint8_t value)
	Function to read and update part of the 8-bit register of TCPCI device The function is NOT performing this operation atomically.
int	tcpci_read_reg16 (const struct i2c_dt_spec *bus, uint8_t reg, uint16_t *value)
	Function to read the 16-bit register of TCPCI device.
int	tcpci_write_reg16 (const struct i2c_dt_spec *bus, uint8_t reg, uint16_t value)
	Function to write a value to the 16-bit register of TCPCI device.
enum tcpc_alert	tcpci_alert_reg_to_enum (uint16_t reg)
	Function that converts the TCPCI alert register to the tcpc_alert enum The hard reset value takes priority, where the rest are returned in the bit order from least significant to most significant.
int	tcpci_tcpm_get_cc (const struct i2c_dt_spec *bus, enum tc_cc_voltage_state *cc1, enum tc_cc_voltage_state *cc2)
	Function that reads the CC status registers and converts read values to enums representing voltages state and partner detection status.
int	tcpci_tcpm_get_chip_info (const struct i2c_dt_spec *bus, struct tcpc_chip_info *chip_info)
	Function to retrieve information about the TCPCI chip.
int	tcpci_tcpm_dump_std_reg (const struct i2c_dt_spec *bus)
	Function to dump the standard TCPCI registers.
int	tcpci_tcpm_set_bist_test_mode (const struct i2c_dt_spec *bus, bool enable)
	Function to enable or disable the BIST (Built-In Self-Test) mode.
int	tcpci_tcpm_transmit_data (const struct i2c_dt_spec *bus, struct pd_msg *msg, const uint8_t retries)
	Function to transmit a PD (Power Delivery) message.
int	tcpci_tcpm_select_rp_value (const struct i2c_dt_spec *bus, enum tc_rp_value rp)
	Function to select the Rp (Pull-up Resistor) value.
int	tcpci_tcpm_get_rp_value (const struct i2c_dt_spec *bus, enum tc_rp_value *rp)
	Function to get the currently selected Rp value.
int	tcpci_tcpm_set_cc (const struct i2c_dt_spec *bus, enum tc_cc_pull pull)
	Function to set the CC pull resistor and set the role as either Source or Sink.
int	tcpci_tcpm_set_drp_toggle (const struct i2c_dt_spec *bus, bool enable)
	Function to enable or disable TCPC auto dual role toggle.
int	tcpci_tcpm_set_roles (const struct i2c_dt_spec *bus, enum pd_rev_type pd_rev, enum tc_power_role power_role, enum tc_data_role data_role)
	Function to set the power and data role of the PD message header.
int	tcpci_tcpm_set_rx_type (const struct i2c_dt_spec *bus, uint8_t type)
	Function to set the RX type.
int	tcpci_tcpm_set_cc_polarity (const struct i2c_dt_spec *bus, enum tc_cc_polarity polarity)
	Function to set the polarity of the CC lines.
int	tcpci_tcpm_set_vconn (const struct i2c_dt_spec *bus, bool enable)
	Function to enable or disable VCONN.
int	tcpci_tcpm_get_status_register (const struct i2c_dt_spec *bus, enum tcpc_status_reg reg, uint16_t *status)
	Function to get the status of a specific TCPCI status register.
int	tcpci_tcpm_clear_status_register (const struct i2c_dt_spec *bus, enum tcpc_status_reg reg, uint16_t mask)
	Function to clear specific bits in a TCPCI status register.
int	tcpci_tcpm_mask_status_register (const struct i2c_dt_spec *bus, enum tcpc_status_reg reg, uint16_t mask)
	Function to set the mask of a TCPCI status register.

Variables
const struct tcpci_reg_dump_map	tcpci_std_regs [38]
	Array containing the standard TCPCI registers list.

Detailed Description

Helper functions to use by the TCPCI-compliant drivers.

This file contains generic TCPCI functions that may be used by the drivers to TCPCI-compliant devices that want to implement vendor-specific functionality without the need to reimplement the TCPCI generic functionality and register operations.

Macro Definition Documentation

TCPCI_STD_REGS_SIZE

#define TCPCI_STD_REGS_SIZE   38

Size of the array containing the standard registers used by tcpci dump command.

Function Documentation

tcpci_alert_reg_to_enum()

enum tcpc_alert tcpci_alert_reg_to_enum

(

uint16_t

reg

)

Function that converts the TCPCI alert register to the tcpc_alert enum The hard reset value takes priority, where the rest are returned in the bit order from least significant to most significant.

Parameters

reg	Value of the TCPCI alert register. This parameter must have value other than zero.

Returns

enum tcpc_alert Value of one of the flags being set in the alert register

tcpci_read_reg16()

int tcpci_read_reg16	(	const struct i2c_dt_spec *	bus,
		uint8_t	reg,
		uint16_t *	value )

Function to read the 16-bit register of TCPCI device.

Parameters

bus	I2C bus
reg	Address of TCPCI register
value	Pointer to variable that will store the register value

Returns

int Status of I2C operation, 0 in case of success

tcpci_read_reg8()

int tcpci_read_reg8	(	const struct i2c_dt_spec *	bus,
		uint8_t	reg,
		uint8_t *	value )

Function to read the 8-bit register of TCPCI device.

Parameters

bus	I2C bus
reg	Address of TCPCI register
value	Pointer to variable that will store the register value

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_clear_status_register()

int tcpci_tcpm_clear_status_register	(	const struct i2c_dt_spec *	bus,
		enum tcpc_status_reg	reg,
		uint16_t	mask )

Function to clear specific bits in a TCPCI status register.

Parameters

bus	I2C bus
reg	Enum representing the status register to be cleared
mask	Bitmask specifying which bits to clear

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_dump_std_reg()

int tcpci_tcpm_dump_std_reg

(

const struct i2c_dt_spec *

bus

)

Function to dump the standard TCPCI registers.

Parameters

bus

I2C bus

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_get_cc()

int tcpci_tcpm_get_cc	(	const struct i2c_dt_spec *	bus,
		enum tc_cc_voltage_state *	cc1,
		enum tc_cc_voltage_state *	cc2 )

Function that reads the CC status registers and converts read values to enums representing voltages state and partner detection status.

Parameters

bus	I2C bus
cc1	Pointer to variable where detected CC1 voltage state will be stored
cc2	Pointer to variable where detected CC2 voltage state will be stored

Returns

-EINVAL if cc1 or cc2 pointer is NULL

int Status of I2C operation, 0 in case of success

tcpci_tcpm_get_chip_info()

int tcpci_tcpm_get_chip_info	(	const struct i2c_dt_spec *	bus,
		struct tcpc_chip_info *	chip_info )

Function to retrieve information about the TCPCI chip.

Parameters

bus	I2C bus
chip_info	Pointer to the structure where the chip information will be stored

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_get_rp_value()

int tcpci_tcpm_get_rp_value	(	const struct i2c_dt_spec *	bus,
		enum tc_rp_value *	rp )

Function to get the currently selected Rp value.

Parameters

bus	I2C bus
rp	Pointer to the variable where the Rp value will be stored

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_get_status_register()

int tcpci_tcpm_get_status_register	(	const struct i2c_dt_spec *	bus,
		enum tcpc_status_reg	reg,
		uint16_t *	status )

Function to get the status of a specific TCPCI status register.

Parameters

bus	I2C bus
reg	Enum representing the status register to be read
status	Pointer to the variable where the status will be stored

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_mask_status_register()

int tcpci_tcpm_mask_status_register	(	const struct i2c_dt_spec *	bus,
		enum tcpc_status_reg	reg,
		uint16_t	mask )

Function to set the mask of a TCPCI status register.

Parameters

bus	I2C bus
reg	Enum representing the status register to be masked
mask	Bitmask specifying which bits to mask

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_select_rp_value()

int tcpci_tcpm_select_rp_value	(	const struct i2c_dt_spec *	bus,
		enum tc_rp_value	rp )

Function to select the Rp (Pull-up Resistor) value.

Parameters

bus	I2C bus
rp	Enum representing the Rp value to be set

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_bist_test_mode()

int tcpci_tcpm_set_bist_test_mode	(	const struct i2c_dt_spec *	bus,
		bool	enable )

Function to enable or disable the BIST (Built-In Self-Test) mode.

Parameters

bus	I2C bus
enable	Boolean flag to enable (true) or disable (false) BIST mode

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_cc()

int tcpci_tcpm_set_cc	(	const struct i2c_dt_spec *	bus,
		enum tc_cc_pull	pull )

Function to set the CC pull resistor and set the role as either Source or Sink.

Parameters

bus	I2C bus
pull	Enum representing the CC pull resistor to be set

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_cc_polarity()

int tcpci_tcpm_set_cc_polarity	(	const struct i2c_dt_spec *	bus,
		enum tc_cc_polarity	polarity )

Function to set the polarity of the CC lines.

Parameters

bus	I2C bus
polarity	Enum representing the CC polarity to be set

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_drp_toggle()

int tcpci_tcpm_set_drp_toggle	(	const struct i2c_dt_spec *	bus,
		bool	enable )

Function to enable or disable TCPC auto dual role toggle.

Parameters

bus	I2C bus
enable	Boolean flag to enable (true) or disable (false) DRP toggle mode

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_roles()

int tcpci_tcpm_set_roles	(	const struct i2c_dt_spec *	bus,
		enum pd_rev_type	pd_rev,
		enum tc_power_role	power_role,
		enum tc_data_role	data_role )

Function to set the power and data role of the PD message header.

Parameters

bus	I2C bus
pd_rev	Enum representing the USB−PD Specification Revision to be set
power_role	Enum representing the power role to be set
data_role	Enum representing the data role to be set

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_rx_type()

int tcpci_tcpm_set_rx_type	(	const struct i2c_dt_spec *	bus,
		uint8_t	type )

Function to set the RX type.

Parameters

bus	I2C bus
type	Value representing the RX type to be set

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_set_vconn()

int tcpci_tcpm_set_vconn	(	const struct i2c_dt_spec *	bus,
		bool	enable )

Function to enable or disable VCONN.

Parameters

bus	I2C bus
enable	Boolean flag to enable (true) or disable (false) VCONN

Returns

int Status of I2C operation, 0 in case of success

tcpci_tcpm_transmit_data()

int tcpci_tcpm_transmit_data	(	const struct i2c_dt_spec *	bus,
		struct pd_msg *	msg,
		const uint8_t	retries )

Function to transmit a PD (Power Delivery) message.

The message is transmitted with a specified number of retries in case of failure.

Parameters

bus	I2C bus
msg	Pointer to the PD message structure to be transmitted
retries	Number of retries in case of transmission failure

Returns

int Status of I2C operation, 0 in case of success

tcpci_update_reg8()

int tcpci_update_reg8	(	const struct i2c_dt_spec *	bus,
		uint8_t	reg,
		uint8_t	mask,
		uint8_t	value )

Function to read and update part of the 8-bit register of TCPCI device The function is NOT performing this operation atomically.

Parameters

bus	I2C bus
reg	Address of TCPCI register
mask	Bitmask specifying which bits of the device register will be modified
value	Value that will be written to the device register after being ANDed with mask

Returns

int Status of I2C operation, 0 in case of success

tcpci_write_reg16()

int tcpci_write_reg16	(	const struct i2c_dt_spec *	bus,
		uint8_t	reg,
		uint16_t	value )

Function to write a value to the 16-bit register of TCPCI device.

Parameters

bus	I2C bus
reg	Address of TCPCI register
value	Value that will be written to the device register

Returns

int Status of I2C operation, 0 in case of success

tcpci_write_reg8()

int tcpci_write_reg8	(	const struct i2c_dt_spec *	bus,
		uint8_t	reg,
		uint8_t	value )

Function to write a value to the 8-bit register of TCPCI device.

Parameters

bus	I2C bus
reg	Address of TCPCI register
value	Value that will be written to the device register

Returns

int Status of I2C operation, 0 in case of success

Variable Documentation

tcpci_std_regs

const struct tcpci_reg_dump_map tcpci_std_regs[38]

extern

Array containing the standard TCPCI registers list.

If the TCPC driver contain any vendor-specific registers, it may override the TCPCI dump_std_reg function tp dump them and should also dump the standard registers using this array.