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-rw-r--r--drivers/misc/ad525x_dpot.h173
1 files changed, 173 insertions, 0 deletions
diff --git a/drivers/misc/ad525x_dpot.h b/drivers/misc/ad525x_dpot.h
new file mode 100644
index 000000000000..99b388e12f5f
--- /dev/null
+++ b/drivers/misc/ad525x_dpot.h
@@ -0,0 +1,173 @@
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
30#define F_CMD_INC (1 << 0) /* Features INC/DEC ALL, 6dB */
31#define F_CMD_EEP (1 << 1) /* Features EEPROM */
32#define F_CMD_TOL (1 << 2) /* RDACS are Read/Write + Tolerance REG */
33#define F_RDACS_RW (1 << 3) /* RDACS are Read/Write + Tolerance REG */
34#define F_RDACS_WONLY (1 << 4) /* RDACS are Write only */
35#define F_AD_APPDATA (1 << 5) /* RDAC Address append to data */
36#define F_SPI_8BIT (1 << 6) /* All SPI XFERS are 8-bit */
37#define F_SPI_16BIT (1 << 7) /* All SPI XFERS are 16-bit */
38#define F_SPI_24BIT (1 << 8) /* All SPI XFERS are 24-bit */
39
40#define F_RDACS_RW_TOL (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)
41#define F_RDACS_RW_EEP (F_RDACS_RW | F_CMD_EEP)
42#define F_SPI (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)
43
44enum dpot_devid {
45 AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
46 AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
47 AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
48 BRDAC0 | BRDAC3, 6, 2),
49 AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
50 BRDAC0 | BRDAC3, 8, 3),
51 AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
52 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
53 AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
54 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),
55 AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
56 BRDAC0 | BRDAC1 | BRDAC2, 9, 6),
57 AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
58 BRDAC0, 8, 7), /* SPI */
59 AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
60 BRDAC0, 8, 8),
61 AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
62 BRDAC0 | BRDAC1, 8, 9),
63 AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
64 BRDAC0, 8, 10),
65 AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
66 BRDAC0, 8, 11),
67 AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
68 BRDAC0, 5, 12),
69 AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
70 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),
71 AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
72 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),
73 AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
74 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,
75 8, 15),
76 AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
77 BRDAC0 | BRDAC1, 8, 16),
78 AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
79 BRDAC0, 10, 17),
80 AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
81 BRDAC0 | BRDAC1, 8, 18),
82 AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
83 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),
84 AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
85 BRDAC0 | BRDAC1, 10, 20),
86 AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
87 BRDAC0, 8, 21),
88 AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
89 BRDAC0 | BRDAC1, 8, 22),
90 AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
91 BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
92 AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
93 BRDAC0, 8, 24),
94 AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25),
95 AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26),
96 AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
97 AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
98 BRDAC0, 7, 28),
99 AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
100 BRDAC0, 8, 29),
101 AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
102 BRDAC0 | BRDAC1, 8, 30),
103 AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
104 BRDAC0 | BRDAC1 | BRDAC2, 8, 31),
105 ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
106 BRDAC0 | BRDAC1, 10, 32),
107};
108
109#define DPOT_RDAC0 0
110#define DPOT_RDAC1 1
111#define DPOT_RDAC2 2
112#define DPOT_RDAC3 3
113#define DPOT_RDAC4 4
114#define DPOT_RDAC5 5
115
116#define DPOT_RDAC_MASK 0x1F
117
118#define DPOT_REG_TOL 0x18
119#define DPOT_TOL_RDAC0 (DPOT_REG_TOL | DPOT_RDAC0)
120#define DPOT_TOL_RDAC1 (DPOT_REG_TOL | DPOT_RDAC1)
121#define DPOT_TOL_RDAC2 (DPOT_REG_TOL | DPOT_RDAC2)
122#define DPOT_TOL_RDAC3 (DPOT_REG_TOL | DPOT_RDAC3)
123#define DPOT_TOL_RDAC4 (DPOT_REG_TOL | DPOT_RDAC4)
124#define DPOT_TOL_RDAC5 (DPOT_REG_TOL | DPOT_RDAC5)
125
126/* RDAC-to-EEPROM Interface Commands */
127#define DPOT_ADDR_RDAC (0x00 << 5)
128#define DPOT_ADDR_EEPROM (0x01 << 5)
129#define DPOT_ADDR_CMD (0x80)
130
131#define DPOT_DEC_ALL_6DB (DPOT_ADDR_CMD | (0x4 << 3))
132#define DPOT_INC_ALL_6DB (DPOT_ADDR_CMD | (0x9 << 3))
133#define DPOT_DEC_ALL (DPOT_ADDR_CMD | (0x6 << 3))
134#define DPOT_INC_ALL (DPOT_ADDR_CMD | (0xB << 3))
135
136#define DPOT_SPI_RDAC 0xB0
137#define DPOT_SPI_EEPROM 0x30
138#define DPOT_SPI_READ_RDAC 0xA0
139#define DPOT_SPI_READ_EEPROM 0x90
140#define DPOT_SPI_DEC_ALL_6DB 0x50
141#define DPOT_SPI_INC_ALL_6DB 0xD0
142#define DPOT_SPI_DEC_ALL 0x70
143#define DPOT_SPI_INC_ALL 0xF0
144
145/* AD5291/2/3 use special commands */
146#define DPOT_AD5291_RDAC 0x01
147#define DPOT_AD5291_READ_RDAC 0x02
148
149struct dpot_data;
150
151struct ad_dpot_bus_ops {
152 int (*read_d8) (void *client);
153 int (*read_r8d8) (void *client, u8 reg);
154 int (*read_r8d16) (void *client, u8 reg);
155 int (*write_d8) (void *client, u8 val);
156 int (*write_r8d8) (void *client, u8 reg, u8 val);
157 int (*write_r8d16) (void *client, u8 reg, u16 val);
158};
159
160struct ad_dpot_bus_data {
161 void *client;
162 const struct ad_dpot_bus_ops *bops;
163};
164
165struct ad_dpot_id {
166 char *name;
167 unsigned long devid;
168};
169
170int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, const struct ad_dpot_id *id);
171int ad_dpot_remove(struct device *dev);
172
173#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-13 08:25:41 -0500