diff options
Diffstat (limited to 'drivers/misc/ad525x_dpot.h')
| -rw-r--r-- | drivers/misc/ad525x_dpot.h | 173 |
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 |