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path: root/drivers/misc/ad525x_dpot.h
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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 @@
+/*
+ * Driver for the Analog Devices digital potentiometers
+ *
+ * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _AD_DPOT_H_
+#define _AD_DPOT_H_
+
+#include <linux/types.h>
+
+#define DPOT_CONF(features, wipers, max_pos, uid) \
+ (((features) << 18) | (((wipers) & 0xFF) << 10) | \
+ ((max_pos & 0xF) << 6) | (uid & 0x3F))
+
+#define DPOT_UID(conf) (conf & 0x3F)
+#define DPOT_MAX_POS(conf) ((conf >> 6) & 0xF)
+#define DPOT_WIPERS(conf) ((conf >> 10) & 0xFF)
+#define DPOT_FEAT(conf) (conf >> 18)
+
+#define BRDAC0 (1 << 0)
+#define BRDAC1 (1 << 1)
+#define BRDAC2 (1 << 2)
+#define BRDAC3 (1 << 3)
+#define BRDAC4 (1 << 4)
+#define BRDAC5 (1 << 5)
+
+#define F_CMD_INC (1 << 0) /* Features INC/DEC ALL, 6dB */
+#define F_CMD_EEP (1 << 1) /* Features EEPROM */
+#define F_CMD_TOL (1 << 2) /* RDACS are Read/Write + Tolerance REG */
+#define F_RDACS_RW (1 << 3) /* RDACS are Read/Write + Tolerance REG */
+#define F_RDACS_WONLY (1 << 4) /* RDACS are Write only */
+#define F_AD_APPDATA (1 << 5) /* RDAC Address append to data */
+#define F_SPI_8BIT (1 << 6) /* All SPI XFERS are 8-bit */
+#define F_SPI_16BIT (1 << 7) /* All SPI XFERS are 16-bit */
+#define F_SPI_24BIT (1 << 8) /* All SPI XFERS are 24-bit */
+
+#define F_RDACS_RW_TOL (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)
+#define F_RDACS_RW_EEP (F_RDACS_RW | F_CMD_EEP)
+#define F_SPI (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)
+
+enum dpot_devid {
+ AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
+ AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
+ AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
+ BRDAC0 | BRDAC3, 6, 2),
+ AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
+ BRDAC0 | BRDAC3, 8, 3),
+ AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
+ AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),
+ AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
+ BRDAC0 | BRDAC1 | BRDAC2, 9, 6),
+ AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 7), /* SPI */
+ AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 8),
+ AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1, 8, 9),
+ AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 10),
+ AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 11),
+ AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 5, 12),
+ AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),
+ AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),
+ AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,
+ 8, 15),
+ AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1, 8, 16),
+ AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
+ BRDAC0, 10, 17),
+ AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
+ BRDAC0 | BRDAC1, 8, 18),
+ AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),
+ AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
+ BRDAC0 | BRDAC1, 10, 20),
+ AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 21),
+ AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1, 8, 22),
+ AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
+ AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 24),
+ AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25),
+ AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26),
+ AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
+ AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 7, 28),
+ AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
+ BRDAC0, 8, 29),
+ AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1, 8, 30),
+ AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
+ BRDAC0 | BRDAC1 | BRDAC2, 8, 31),
+ ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
+ BRDAC0 | BRDAC1, 10, 32),
+};
+
+#define DPOT_RDAC0 0
+#define DPOT_RDAC1 1
+#define DPOT_RDAC2 2
+#define DPOT_RDAC3 3
+#define DPOT_RDAC4 4
+#define DPOT_RDAC5 5
+
+#define DPOT_RDAC_MASK 0x1F
+
+#define DPOT_REG_TOL 0x18
+#define DPOT_TOL_RDAC0 (DPOT_REG_TOL | DPOT_RDAC0)
+#define DPOT_TOL_RDAC1 (DPOT_REG_TOL | DPOT_RDAC1)
+#define DPOT_TOL_RDAC2 (DPOT_REG_TOL | DPOT_RDAC2)
+#define DPOT_TOL_RDAC3 (DPOT_REG_TOL | DPOT_RDAC3)
+#define DPOT_TOL_RDAC4 (DPOT_REG_TOL | DPOT_RDAC4)
+#define DPOT_TOL_RDAC5 (DPOT_REG_TOL | DPOT_RDAC5)
+
+/* RDAC-to-EEPROM Interface Commands */
+#define DPOT_ADDR_RDAC (0x00 << 5)
+#define DPOT_ADDR_EEPROM (0x01 << 5)
+#define DPOT_ADDR_CMD (0x80)
+
+#define DPOT_DEC_ALL_6DB (DPOT_ADDR_CMD | (0x4 << 3))
+#define DPOT_INC_ALL_6DB (DPOT_ADDR_CMD | (0x9 << 3))
+#define DPOT_DEC_ALL (DPOT_ADDR_CMD | (0x6 << 3))
+#define DPOT_INC_ALL (DPOT_ADDR_CMD | (0xB << 3))
+
+#define DPOT_SPI_RDAC 0xB0
+#define DPOT_SPI_EEPROM 0x30
+#define DPOT_SPI_READ_RDAC 0xA0
+#define DPOT_SPI_READ_EEPROM 0x90
+#define DPOT_SPI_DEC_ALL_6DB 0x50
+#define DPOT_SPI_INC_ALL_6DB 0xD0
+#define DPOT_SPI_DEC_ALL 0x70
+#define DPOT_SPI_INC_ALL 0xF0
+
+/* AD5291/2/3 use special commands */
+#define DPOT_AD5291_RDAC 0x01
+#define DPOT_AD5291_READ_RDAC 0x02
+
+struct dpot_data;
+
+struct ad_dpot_bus_ops {
+ int (*read_d8) (void *client);
+ int (*read_r8d8) (void *client, u8 reg);
+ int (*read_r8d16) (void *client, u8 reg);
+ int (*write_d8) (void *client, u8 val);
+ int (*write_r8d8) (void *client, u8 reg, u8 val);
+ int (*write_r8d16) (void *client, u8 reg, u16 val);
+};
+
+struct ad_dpot_bus_data {
+ void *client;
+ const struct ad_dpot_bus_ops *bops;
+};
+
+struct ad_dpot_id {
+ char *name;
+ unsigned long devid;
+};
+
+int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, const struct ad_dpot_id *id);
+int ad_dpot_remove(struct device *dev);
+
+#endif