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
44 enum 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 */
55 struct 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
max_tcpci_read16(struct max_tcpci_chip * chip,unsigned int reg,u16 * val)65 static 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
max_tcpci_write16(struct max_tcpci_chip * chip,unsigned int reg,u16 val)70 static 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
max_tcpci_read8(struct max_tcpci_chip * chip,unsigned int reg,u8 * val)75 static 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
max_tcpci_write8(struct max_tcpci_chip * chip,unsigned int reg,u8 val)80 static 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 */
98 bool max_contaminant_is_contaminant(struct max_tcpci_chip *chip, bool disconnect_while_debounce,
99 bool *cc_handled);
100
101 #endif // TCPCI_MAXIM_H_
102