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