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1 | /* |
2 | * Driver for the Analog Devices digital potentiometers |
3 | * |
4 | * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc. |
5 | * |
6 | * Licensed under the GPL-2 or later. |
7 | */ |
8 | |
9 | #ifndef _AD_DPOT_H_ |
10 | #define _AD_DPOT_H_ |
11 | |
12 | #include <linux/types.h> |
13 | |
14 | #define DPOT_CONF(features, wipers, max_pos, uid) \ |
15 | (((features) << 18) | (((wipers) & 0xFF) << 10) | \ |
16 | ((max_pos & 0xF) << 6) | (uid & 0x3F)) |
17 | |
18 | #define DPOT_UID(conf) (conf & 0x3F) |
19 | #define DPOT_MAX_POS(conf) ((conf >> 6) & 0xF) |
20 | #define DPOT_WIPERS(conf) ((conf >> 10) & 0xFF) |
21 | #define DPOT_FEAT(conf) (conf >> 18) |
22 | |
23 | #define BRDAC0 (1 << 0) |
24 | #define BRDAC1 (1 << 1) |
25 | #define BRDAC2 (1 << 2) |
26 | #define BRDAC3 (1 << 3) |
27 | #define BRDAC4 (1 << 4) |
28 | #define BRDAC5 (1 << 5) |
29 | #define MAX_RDACS 6 |
30 | |
31 | #define F_CMD_INC (1 << 0) /* Features INC/DEC ALL, 6dB */ |
32 | #define F_CMD_EEP (1 << 1) /* Features EEPROM */ |
33 | #define F_CMD_OTP (1 << 2) /* Features OTP */ |
34 | #define F_CMD_TOL (1 << 3) /* RDACS feature Tolerance REG */ |
35 | #define F_RDACS_RW (1 << 4) /* RDACS are Read/Write */ |
36 | #define F_RDACS_WONLY (1 << 5) /* RDACS are Write only */ |
37 | #define F_AD_APPDATA (1 << 6) /* RDAC Address append to data */ |
38 | #define F_SPI_8BIT (1 << 7) /* All SPI XFERS are 8-bit */ |
39 | #define F_SPI_16BIT (1 << 8) /* All SPI XFERS are 16-bit */ |
40 | #define F_SPI_24BIT (1 << 9) /* All SPI XFERS are 24-bit */ |
41 | |
42 | #define F_RDACS_RW_TOL (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL) |
43 | #define F_RDACS_RW_EEP (F_RDACS_RW | F_CMD_EEP) |
44 | #define F_SPI (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT) |
45 | |
46 | enum dpot_devid { |
47 | AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */ |
48 | AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1), |
49 | AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
50 | BRDAC1 | BRDAC3, 6, 2), |
51 | AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
52 | BRDAC1 | BRDAC3, 8, 3), |
53 | AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
54 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4), |
55 | AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
56 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5), |
57 | AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
58 | BRDAC0 | BRDAC1 | BRDAC2, 9, 6), |
59 | AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
60 | BRDAC0, 8, 7), /* SPI */ |
61 | AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
62 | BRDAC0, 8, 8), |
63 | AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
64 | BRDAC0 | BRDAC1, 8, 9), |
65 | AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
66 | BRDAC0, 8, 10), |
67 | AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
68 | BRDAC0, 8, 11), |
69 | AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
70 | BRDAC0, 5, 12), |
71 | AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
72 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13), |
73 | AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
74 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14), |
75 | AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
76 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5, |
77 | 8, 15), |
78 | AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
79 | BRDAC0 | BRDAC1, 8, 16), |
80 | AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT, |
81 | BRDAC0, 10, 17), |
82 | AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT, |
83 | BRDAC0 | BRDAC1, 8, 18), |
84 | AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT, |
85 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19), |
86 | AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT, |
87 | BRDAC0 | BRDAC1, 10, 20), |
88 | AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
89 | BRDAC0, 8, 21), |
90 | AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
91 | BRDAC0 | BRDAC1, 8, 22), |
92 | AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
93 | BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23), |
94 | AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
95 | BRDAC0, 8, 24), |
96 | AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP, |
97 | BRDAC0, 8, 25), |
98 | AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT | F_CMD_OTP, |
99 | BRDAC0, 10, 26), |
100 | AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27), |
101 | AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT, |
102 | BRDAC0, 7, 28), |
103 | AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
104 | BRDAC0, 8, 29), |
105 | AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
106 | BRDAC0 | BRDAC1, 8, 30), |
107 | AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT, |
108 | BRDAC0 | BRDAC1 | BRDAC2, 8, 31), |
109 | ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT, |
110 | BRDAC0 | BRDAC1, 10, 32), |
111 | AD5241_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 33), |
112 | AD5242_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 34), |
113 | AD5243_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 35), |
114 | AD5245_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 36), |
115 | AD5246_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 37), |
116 | AD5247_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 7, 38), |
117 | AD5248_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 39), |
118 | AD5280_ID = DPOT_CONF(F_RDACS_RW, BRDAC0, 8, 40), |
119 | AD5282_ID = DPOT_CONF(F_RDACS_RW, BRDAC0 | BRDAC1, 8, 41), |
120 | ADN2860_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC, |
121 | BRDAC0 | BRDAC1 | BRDAC2, 9, 42), |
122 | AD5273_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 6, 43), |
123 | AD5171_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 6, 44), |
124 | AD5170_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 45), |
125 | AD5172_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 46), |
126 | AD5173_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0 | BRDAC1, 8, 47), |
127 | AD5270_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT, |
128 | BRDAC0, 10, 48), |
129 | AD5271_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP | F_SPI_16BIT, |
130 | BRDAC0, 8, 49), |
131 | AD5272_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 10, 50), |
132 | AD5274_ID = DPOT_CONF(F_RDACS_RW | F_CMD_OTP, BRDAC0, 8, 51), |
133 | }; |
134 | |
135 | #define DPOT_RDAC0 0 |
136 | #define DPOT_RDAC1 1 |
137 | #define DPOT_RDAC2 2 |
138 | #define DPOT_RDAC3 3 |
139 | #define DPOT_RDAC4 4 |
140 | #define DPOT_RDAC5 5 |
141 | |
142 | #define DPOT_RDAC_MASK 0x1F |
143 | |
144 | #define DPOT_REG_TOL 0x18 |
145 | #define DPOT_TOL_RDAC0 (DPOT_REG_TOL | DPOT_RDAC0) |
146 | #define DPOT_TOL_RDAC1 (DPOT_REG_TOL | DPOT_RDAC1) |
147 | #define DPOT_TOL_RDAC2 (DPOT_REG_TOL | DPOT_RDAC2) |
148 | #define DPOT_TOL_RDAC3 (DPOT_REG_TOL | DPOT_RDAC3) |
149 | #define DPOT_TOL_RDAC4 (DPOT_REG_TOL | DPOT_RDAC4) |
150 | #define DPOT_TOL_RDAC5 (DPOT_REG_TOL | DPOT_RDAC5) |
151 | |
152 | /* RDAC-to-EEPROM Interface Commands */ |
153 | #define DPOT_ADDR_RDAC (0x0 << 5) |
154 | #define DPOT_ADDR_EEPROM (0x1 << 5) |
155 | #define DPOT_ADDR_OTP (0x1 << 6) |
156 | #define DPOT_ADDR_CMD (0x1 << 7) |
157 | #define DPOT_ADDR_OTP_EN (0x1 << 9) |
158 | |
159 | #define DPOT_DEC_ALL_6DB (DPOT_ADDR_CMD | (0x4 << 3)) |
160 | #define DPOT_INC_ALL_6DB (DPOT_ADDR_CMD | (0x9 << 3)) |
161 | #define DPOT_DEC_ALL (DPOT_ADDR_CMD | (0x6 << 3)) |
162 | #define DPOT_INC_ALL (DPOT_ADDR_CMD | (0xB << 3)) |
163 | |
164 | #define DPOT_SPI_RDAC 0xB0 |
165 | #define DPOT_SPI_EEPROM 0x30 |
166 | #define DPOT_SPI_READ_RDAC 0xA0 |
167 | #define DPOT_SPI_READ_EEPROM 0x90 |
168 | #define DPOT_SPI_DEC_ALL_6DB 0x50 |
169 | #define DPOT_SPI_INC_ALL_6DB 0xD0 |
170 | #define DPOT_SPI_DEC_ALL 0x70 |
171 | #define DPOT_SPI_INC_ALL 0xF0 |
172 | |
173 | /* AD5291/2/3 use special commands */ |
174 | #define DPOT_AD5291_RDAC 0x01 |
175 | #define DPOT_AD5291_READ_RDAC 0x02 |
176 | #define DPOT_AD5291_STORE_XTPM 0x03 |
177 | #define DPOT_AD5291_CTRLREG 0x06 |
178 | #define DPOT_AD5291_UNLOCK_CMD 0x03 |
179 | |
180 | /* AD5270/1/2/4 use special commands */ |
181 | #define DPOT_AD5270_1_2_4_RDAC 0x01 |
182 | #define DPOT_AD5270_1_2_4_READ_RDAC 0x02 |
183 | #define DPOT_AD5270_1_2_4_STORE_XTPM 0x03 |
184 | #define DPOT_AD5270_1_2_4_CTRLREG 0x07 |
185 | #define DPOT_AD5270_1_2_4_UNLOCK_CMD 0x03 |
186 | |
187 | #define DPOT_AD5282_RDAC_AB 0x80 |
188 | |
189 | #define DPOT_AD5273_FUSE 0x80 |
190 | #define DPOT_AD5170_2_3_FUSE 0x20 |
191 | #define DPOT_AD5170_2_3_OW 0x08 |
192 | #define DPOT_AD5172_3_A0 0x08 |
193 | #define DPOT_AD5170_2FUSE 0x80 |
194 | |
195 | struct dpot_data; |
196 | |
197 | struct ad_dpot_bus_ops { |
198 | int (*read_d8) (void *client); |
199 | int (*read_r8d8) (void *client, u8 reg); |
200 | int (*read_r8d16) (void *client, u8 reg); |
201 | int (*write_d8) (void *client, u8 val); |
202 | int (*write_r8d8) (void *client, u8 reg, u8 val); |
203 | int (*write_r8d16) (void *client, u8 reg, u16 val); |
204 | }; |
205 | |
206 | struct ad_dpot_bus_data { |
207 | void *client; |
208 | const struct ad_dpot_bus_ops *bops; |
209 | }; |
210 | |
211 | int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, |
212 | unsigned long devid, const char *name); |
213 | int ad_dpot_remove(struct device *dev); |
214 | |
215 | #endif |
216 |
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