tcpci_maxim.h

  1/* SPDX-License-Identifier: GPL-2.0+ */
  2/*
  3 * Copyright 2022 Google, Inc
  4 *
  5 * MAXIM TCPC header file.
  6 */
  7#ifndef TCPCI_MAXIM_H_
  8#define TCPCI_MAXIM_H_
  9
 10#define VENDOR_CC_STATUS2                       0x85
 11#define CC1_VUFP_RD0P5                          BIT(1)
 12#define CC2_VUFP_RD0P5                          BIT(5)
 13#define TCPC_VENDOR_FLADC_STATUS                0x89
 14
 15#define TCPC_VENDOR_CC_CTRL1                    0x8c
 16#define CCCONNDRY                               BIT(7)
 17#define CCCOMPEN                                BIT(5)
 18
 19#define TCPC_VENDOR_CC_CTRL2                    0x8d
 20#define SBUOVPDIS                               BIT(7)
 21#define CCOVPDIS                                BIT(6)
 22#define SBURPCTRL                               BIT(5)
 23#define CCLPMODESEL                             GENMASK(4, 3)
 24#define LOW_POWER_MODE_DISABLE                  0
 25#define ULTRA_LOW_POWER_MODE                    1
 26#define CCRPCTRL                                GENMASK(2, 0)
 27#define UA_1_SRC                                1
 28#define UA_80_SRC                               3
 29
 30#define TCPC_VENDOR_CC_CTRL3                    0x8e
 31#define CCWTRDEB                                GENMASK(7, 6)
 32#define CCWTRDEB_1MS                            1
 33#define CCWTRSEL                                GENMASK(5, 3)
 34#define CCWTRSEL_1V                             0x4
 35#define CCLADDERDIS                             BIT(2)
 36#define WTRCYCLE                                GENMASK(0, 0)
 37#define WTRCYCLE_2_4_S                          0
 38#define WTRCYCLE_4_8_S                          1
 39
 40#define TCPC_VENDOR_ADC_CTRL1                   0x91
 41#define ADCINSEL                                GENMASK(7, 5)
 42#define ADCEN                                   BIT(0)
 43
 44enum contamiant_state {
 45	NOT_DETECTED,
 46	DETECTED,
 47	SINK,
 48};
 49
 50/*
 51 * @potential_contaminant:
 52 *		Last returned result to tcpm indicating whether the TCPM port
 53 *		has potential contaminant.
 54 */
 55struct max_tcpci_chip {
 56	struct tcpci_data data;
 57	struct tcpci *tcpci;
 58	struct device *dev;
 59	struct i2c_client *client;
 60	struct tcpm_port *port;
 61	enum contamiant_state contaminant_state;
 62	bool veto_vconn_swap;
 63};
 64
 65static inline int max_tcpci_read16(struct max_tcpci_chip *chip, unsigned int reg, u16 *val)
 66{
 67	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
 68}
 69
 70static inline int max_tcpci_write16(struct max_tcpci_chip *chip, unsigned int reg, u16 val)
 71{
 72	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
 73}
 74
 75static inline int max_tcpci_read8(struct max_tcpci_chip *chip, unsigned int reg, u8 *val)
 76{
 77	return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
 78}
 79
 80static inline int max_tcpci_write8(struct max_tcpci_chip *chip, unsigned int reg, u8 val)
 81{
 82	return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
 83}
 84
 85/**
 86 * max_contaminant_is_contaminant - Test if CC was toggled due to contaminant
 87 *
 88 * @chip: Handle to a struct max_tcpci_chip
 89 * @disconnect_while_debounce: Whether the disconnect was detected when CC
 90 *      		       pins were debouncing
 91 * @cc_handled: Returns whether or not update to CC status was handled here
 92 *
 93 * Determine if a contaminant was detected.
 94 *
 95 * Returns: true if a contaminant was detected, false otherwise. cc_handled
 96 * is updated to reflect whether or not further CC handling is required.
 97 */
 98bool max_contaminant_is_contaminant(struct max_tcpci_chip *chip, bool disconnect_while_debounce,
 99				    bool *cc_handled);
100
101#endif  // TCPCI_MAXIM_H_