1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * 1-Wire implementation for the ds2780 chip
5 * Copyright (C) 2010 Indesign, LLC
7 * Author: Clifton Barnes <cabarnes@indesign-llc.com>
9 * Based on w1-ds2760 driver
15 /* Function commands */
16 #define W1_DS2780_READ_DATA 0x69
17 #define W1_DS2780_WRITE_DATA 0x6C
18 #define W1_DS2780_COPY_DATA 0x48
19 #define W1_DS2780_RECALL_DATA 0xB8
20 #define W1_DS2780_LOCK 0x6A
23 /* Register 0x00 Reserved */
24 #define DS2780_STATUS_REG 0x01
25 #define DS2780_RAAC_MSB_REG 0x02
26 #define DS2780_RAAC_LSB_REG 0x03
27 #define DS2780_RSAC_MSB_REG 0x04
28 #define DS2780_RSAC_LSB_REG 0x05
29 #define DS2780_RARC_REG 0x06
30 #define DS2780_RSRC_REG 0x07
31 #define DS2780_IAVG_MSB_REG 0x08
32 #define DS2780_IAVG_LSB_REG 0x09
33 #define DS2780_TEMP_MSB_REG 0x0A
34 #define DS2780_TEMP_LSB_REG 0x0B
35 #define DS2780_VOLT_MSB_REG 0x0C
36 #define DS2780_VOLT_LSB_REG 0x0D
37 #define DS2780_CURRENT_MSB_REG 0x0E
38 #define DS2780_CURRENT_LSB_REG 0x0F
39 #define DS2780_ACR_MSB_REG 0x10
40 #define DS2780_ACR_LSB_REG 0x11
41 #define DS2780_ACRL_MSB_REG 0x12
42 #define DS2780_ACRL_LSB_REG 0x13
43 #define DS2780_AS_REG 0x14
44 #define DS2780_SFR_REG 0x15
45 #define DS2780_FULL_MSB_REG 0x16
46 #define DS2780_FULL_LSB_REG 0x17
47 #define DS2780_AE_MSB_REG 0x18
48 #define DS2780_AE_LSB_REG 0x19
49 #define DS2780_SE_MSB_REG 0x1A
50 #define DS2780_SE_LSB_REG 0x1B
51 /* Register 0x1C - 0x1E Reserved */
52 #define DS2780_EEPROM_REG 0x1F
53 #define DS2780_EEPROM_BLOCK0_START 0x20
54 /* Register 0x20 - 0x2F User EEPROM */
55 #define DS2780_EEPROM_BLOCK0_END 0x2F
56 /* Register 0x30 - 0x5F Reserved */
57 #define DS2780_EEPROM_BLOCK1_START 0x60
58 #define DS2780_CONTROL_REG 0x60
59 #define DS2780_AB_REG 0x61
60 #define DS2780_AC_MSB_REG 0x62
61 #define DS2780_AC_LSB_REG 0x63
62 #define DS2780_VCHG_REG 0x64
63 #define DS2780_IMIN_REG 0x65
64 #define DS2780_VAE_REG 0x66
65 #define DS2780_IAE_REG 0x67
66 #define DS2780_AE_40_REG 0x68
67 #define DS2780_RSNSP_REG 0x69
68 #define DS2780_FULL_40_MSB_REG 0x6A
69 #define DS2780_FULL_40_LSB_REG 0x6B
70 #define DS2780_FULL_3040_SLOPE_REG 0x6C
71 #define DS2780_FULL_2030_SLOPE_REG 0x6D
72 #define DS2780_FULL_1020_SLOPE_REG 0x6E
73 #define DS2780_FULL_0010_SLOPE_REG 0x6F
74 #define DS2780_AE_3040_SLOPE_REG 0x70
75 #define DS2780_AE_2030_SLOPE_REG 0x71
76 #define DS2780_AE_1020_SLOPE_REG 0x72
77 #define DS2780_AE_0010_SLOPE_REG 0x73
78 #define DS2780_SE_3040_SLOPE_REG 0x74
79 #define DS2780_SE_2030_SLOPE_REG 0x75
80 #define DS2780_SE_1020_SLOPE_REG 0x76
81 #define DS2780_SE_0010_SLOPE_REG 0x77
82 #define DS2780_RSGAIN_MSB_REG 0x78
83 #define DS2780_RSGAIN_LSB_REG 0x79
84 #define DS2780_RSTC_REG 0x7A
85 #define DS2780_FRSGAIN_MSB_REG 0x7B
86 #define DS2780_FRSGAIN_LSB_REG 0x7C
87 #define DS2780_EEPROM_BLOCK1_END 0x7C
88 /* Register 0x7D - 0xFF Reserved */
90 /* Number of valid register addresses */
91 #define DS2780_DATA_SIZE 0x80
93 /* Status register bits */
94 #define DS2780_STATUS_REG_CHGTF (1 << 7)
95 #define DS2780_STATUS_REG_AEF (1 << 6)
96 #define DS2780_STATUS_REG_SEF (1 << 5)
97 #define DS2780_STATUS_REG_LEARNF (1 << 4)
99 #define DS2780_STATUS_REG_UVF (1 << 2)
100 #define DS2780_STATUS_REG_PORF (1 << 1)
103 /* Control register bits */
105 #define DS2780_CONTROL_REG_UVEN (1 << 6)
106 #define DS2780_CONTROL_REG_PMOD (1 << 5)
107 #define DS2780_CONTROL_REG_RNAOP (1 << 4)
108 /* Bit 0 - 3 Reserved */
110 /* Special feature register bits */
111 /* Bit 1 - 7 Reserved */
112 #define DS2780_SFR_REG_PIOSC (1 << 0)
114 /* EEPROM register bits */
115 #define DS2780_EEPROM_REG_EEC (1 << 7)
116 #define DS2780_EEPROM_REG_LOCK (1 << 6)
117 /* Bit 2 - 6 Reserved */
118 #define DS2780_EEPROM_REG_BL1 (1 << 1)
119 #define DS2780_EEPROM_REG_BL0 (1 << 0)
121 extern int w1_ds2780_io(struct device *dev, char *buf, int addr, size_t count,
123 extern int w1_ds2780_eeprom_cmd(struct device *dev, int addr, int cmd);
125 #endif /* !_W1_DS2780_H */