1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * 1-Wire implementation for the ds2780 chip
4  *
5  * Author: Renata Sayakhova <renata@oktetlabs.ru>
6  *
7  * Based on w1-ds2760 driver
8  */
9 
10 #ifndef _W1_DS2781_H
11 #define _W1_DS2781_H
12 
13 /* Function commands */
14 #define W1_DS2781_READ_DATA		0x69
15 #define W1_DS2781_WRITE_DATA		0x6C
16 #define W1_DS2781_COPY_DATA		0x48
17 #define W1_DS2781_RECALL_DATA		0xB8
18 #define W1_DS2781_LOCK			0x6A
19 
20 /* Register map */
21 /* Register 0x00 Reserved */
22 #define DS2781_STATUS			0x01
23 #define DS2781_RAAC_MSB			0x02
24 #define DS2781_RAAC_LSB			0x03
25 #define DS2781_RSAC_MSB			0x04
26 #define DS2781_RSAC_LSB			0x05
27 #define DS2781_RARC			0x06
28 #define DS2781_RSRC			0x07
29 #define DS2781_IAVG_MSB			0x08
30 #define DS2781_IAVG_LSB			0x09
31 #define DS2781_TEMP_MSB			0x0A
32 #define DS2781_TEMP_LSB			0x0B
33 #define DS2781_VOLT_MSB			0x0C
34 #define DS2781_VOLT_LSB			0x0D
35 #define DS2781_CURRENT_MSB		0x0E
36 #define DS2781_CURRENT_LSB		0x0F
37 #define DS2781_ACR_MSB			0x10
38 #define DS2781_ACR_LSB			0x11
39 #define DS2781_ACRL_MSB			0x12
40 #define DS2781_ACRL_LSB			0x13
41 #define DS2781_AS			0x14
42 #define DS2781_SFR			0x15
43 #define DS2781_FULL_MSB			0x16
44 #define DS2781_FULL_LSB			0x17
45 #define DS2781_AE_MSB			0x18
46 #define DS2781_AE_LSB			0x19
47 #define DS2781_SE_MSB			0x1A
48 #define DS2781_SE_LSB			0x1B
49 /* Register 0x1C - 0x1E Reserved */
50 #define DS2781_EEPROM		0x1F
51 #define DS2781_EEPROM_BLOCK0_START	0x20
52 /* Register 0x20 - 0x2F User EEPROM */
53 #define DS2781_EEPROM_BLOCK0_END	0x2F
54 /* Register 0x30 - 0x5F Reserved */
55 #define DS2781_EEPROM_BLOCK1_START	0x60
56 #define DS2781_CONTROL			0x60
57 #define DS2781_AB			0x61
58 #define DS2781_AC_MSB			0x62
59 #define DS2781_AC_LSB			0x63
60 #define DS2781_VCHG			0x64
61 #define DS2781_IMIN			0x65
62 #define DS2781_VAE			0x66
63 #define DS2781_IAE			0x67
64 #define DS2781_AE_40			0x68
65 #define DS2781_RSNSP			0x69
66 #define DS2781_FULL_40_MSB		0x6A
67 #define DS2781_FULL_40_LSB		0x6B
68 #define DS2781_FULL_4_SLOPE		0x6C
69 #define DS2781_FULL_3_SLOPE		0x6D
70 #define DS2781_FULL_2_SLOPE		0x6E
71 #define DS2781_FULL_1_SLOPE		0x6F
72 #define DS2781_AE_4_SLOPE		0x70
73 #define DS2781_AE_3_SLOPE		0x71
74 #define DS2781_AE_2_SLOPE		0x72
75 #define DS2781_AE_1_SLOPE		0x73
76 #define DS2781_SE_4_SLOPE		0x74
77 #define DS2781_SE_3_SLOPE		0x75
78 #define DS2781_SE_2_SLOPE		0x76
79 #define DS2781_SE_1_SLOPE		0x77
80 #define DS2781_RSGAIN_MSB		0x78
81 #define DS2781_RSGAIN_LSB		0x79
82 #define DS2781_RSTC			0x7A
83 #define DS2781_COB			0x7B
84 #define DS2781_TBP34			0x7C
85 #define DS2781_TBP23			0x7D
86 #define DS2781_TBP12			0x7E
87 #define DS2781_EEPROM_BLOCK1_END	0x7F
88 /* Register 0x7D - 0xFF Reserved */
89 
90 #define DS2781_FSGAIN_MSB		0xB0
91 #define DS2781_FSGAIN_LSB		0xB1
92 
93 /* Number of valid register addresses */
94 #define DS2781_DATA_SIZE		0xB2
95 
96 /* Status register bits */
97 #define DS2781_STATUS_CHGTF		(1 << 7)
98 #define DS2781_STATUS_AEF		(1 << 6)
99 #define DS2781_STATUS_SEF		(1 << 5)
100 #define DS2781_STATUS_LEARNF		(1 << 4)
101 /* Bit 3 Reserved */
102 #define DS2781_STATUS_UVF		(1 << 2)
103 #define DS2781_STATUS_PORF		(1 << 1)
104 /* Bit 0 Reserved */
105 
106 /* Control register bits */
107 /* Bit 7 Reserved */
108 #define DS2781_CONTROL_NBEN		(1 << 7)
109 #define DS2781_CONTROL_UVEN		(1 << 6)
110 #define DS2781_CONTROL_PMOD		(1 << 5)
111 #define DS2781_CONTROL_RNAOP		(1 << 4)
112 #define DS1781_CONTROL_UVTH		(1 << 3)
113 /* Bit 0 - 2 Reserved */
114 
115 /* Special feature register bits */
116 /* Bit 1 - 7 Reserved */
117 #define DS2781_SFR_PIOSC		(1 << 0)
118 
119 /* EEPROM register bits */
120 #define DS2781_EEPROM_EEC		(1 << 7)
121 #define DS2781_EEPROM_LOCK		(1 << 6)
122 /* Bit 2 - 6 Reserved */
123 #define DS2781_EEPROM_BL1		(1 << 1)
124 #define DS2781_EEPROM_BL0		(1 << 0)
125 
126 extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
127 			int io);
128 extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);
129 
130 #endif /* !_W1_DS2781_H */
131