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6c536e4ce8
Split the bus logic out into separate files so that we can handle I2C and SPI busses independently. The new SPI bus logic brings in support for a lot more parts: AD5160, AD5161, AD5162, AD5165, AD5200, AD5201, AD5203, AD5204, AD5206, AD5207, AD5231, AD5232, AD5233, AD5235, AD5260, AD5262, AD5263, AD5290, AD5291, AD5292, AD5293, AD7376, AD8400, AD8402, AD8403, ADN2850 [randy.dunlap@oracle.com: fix ad525X_dpot build] Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
174 lines
6.1 KiB
C
174 lines
6.1 KiB
C
/*
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* Driver for the Analog Devices digital potentiometers
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*
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* Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _AD_DPOT_H_
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#define _AD_DPOT_H_
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#include <linux/types.h>
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#define DPOT_CONF(features, wipers, max_pos, uid) \
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(((features) << 18) | (((wipers) & 0xFF) << 10) | \
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((max_pos & 0xF) << 6) | (uid & 0x3F))
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#define DPOT_UID(conf) (conf & 0x3F)
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#define DPOT_MAX_POS(conf) ((conf >> 6) & 0xF)
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#define DPOT_WIPERS(conf) ((conf >> 10) & 0xFF)
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#define DPOT_FEAT(conf) (conf >> 18)
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#define BRDAC0 (1 << 0)
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#define BRDAC1 (1 << 1)
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#define BRDAC2 (1 << 2)
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#define BRDAC3 (1 << 3)
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#define BRDAC4 (1 << 4)
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#define BRDAC5 (1 << 5)
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#define F_CMD_INC (1 << 0) /* Features INC/DEC ALL, 6dB */
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#define F_CMD_EEP (1 << 1) /* Features EEPROM */
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#define F_CMD_TOL (1 << 2) /* RDACS are Read/Write + Tolerance REG */
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#define F_RDACS_RW (1 << 3) /* RDACS are Read/Write + Tolerance REG */
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#define F_RDACS_WONLY (1 << 4) /* RDACS are Write only */
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#define F_AD_APPDATA (1 << 5) /* RDAC Address append to data */
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#define F_SPI_8BIT (1 << 6) /* All SPI XFERS are 8-bit */
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#define F_SPI_16BIT (1 << 7) /* All SPI XFERS are 16-bit */
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#define F_SPI_24BIT (1 << 8) /* All SPI XFERS are 24-bit */
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#define F_RDACS_RW_TOL (F_RDACS_RW | F_CMD_EEP | F_CMD_TOL)
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#define F_RDACS_RW_EEP (F_RDACS_RW | F_CMD_EEP)
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#define F_SPI (F_SPI_8BIT | F_SPI_16BIT | F_SPI_24BIT)
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enum dpot_devid {
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AD5258_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 6, 0), /* I2C */
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AD5259_ID = DPOT_CONF(F_RDACS_RW_TOL, BRDAC0, 8, 1),
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AD5251_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
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BRDAC0 | BRDAC3, 6, 2),
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AD5252_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
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BRDAC0 | BRDAC3, 8, 3),
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AD5253_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 4),
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AD5254_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 5),
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AD5255_ID = DPOT_CONF(F_RDACS_RW_TOL | F_CMD_INC,
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BRDAC0 | BRDAC1 | BRDAC2, 9, 6),
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AD5160_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 7), /* SPI */
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AD5161_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 8),
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AD5162_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1, 8, 9),
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AD5165_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 10),
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AD5200_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 11),
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AD5201_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 5, 12),
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AD5203_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 13),
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AD5204_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 14),
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AD5206_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3 | BRDAC4 | BRDAC5,
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8, 15),
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AD5207_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1, 8, 16),
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AD5231_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
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BRDAC0, 10, 17),
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AD5232_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
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BRDAC0 | BRDAC1, 8, 18),
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AD5233_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_16BIT,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 6, 19),
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AD5235_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
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BRDAC0 | BRDAC1, 10, 20),
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AD5260_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 21),
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AD5262_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1, 8, 22),
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AD5263_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1 | BRDAC2 | BRDAC3, 8, 23),
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AD5290_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 24),
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AD5291_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 8, 25),
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AD5292_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 26),
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AD5293_ID = DPOT_CONF(F_RDACS_RW | F_SPI_16BIT, BRDAC0, 10, 27),
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AD7376_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 7, 28),
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AD8400_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_8BIT,
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BRDAC0, 8, 29),
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AD8402_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1, 8, 30),
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AD8403_ID = DPOT_CONF(F_RDACS_WONLY | F_AD_APPDATA | F_SPI_16BIT,
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BRDAC0 | BRDAC1 | BRDAC2, 8, 31),
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ADN2850_ID = DPOT_CONF(F_RDACS_RW_EEP | F_CMD_INC | F_SPI_24BIT,
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BRDAC0 | BRDAC1, 10, 32),
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};
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#define DPOT_RDAC0 0
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#define DPOT_RDAC1 1
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#define DPOT_RDAC2 2
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#define DPOT_RDAC3 3
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#define DPOT_RDAC4 4
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#define DPOT_RDAC5 5
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#define DPOT_RDAC_MASK 0x1F
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#define DPOT_REG_TOL 0x18
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#define DPOT_TOL_RDAC0 (DPOT_REG_TOL | DPOT_RDAC0)
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#define DPOT_TOL_RDAC1 (DPOT_REG_TOL | DPOT_RDAC1)
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#define DPOT_TOL_RDAC2 (DPOT_REG_TOL | DPOT_RDAC2)
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#define DPOT_TOL_RDAC3 (DPOT_REG_TOL | DPOT_RDAC3)
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#define DPOT_TOL_RDAC4 (DPOT_REG_TOL | DPOT_RDAC4)
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#define DPOT_TOL_RDAC5 (DPOT_REG_TOL | DPOT_RDAC5)
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/* RDAC-to-EEPROM Interface Commands */
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#define DPOT_ADDR_RDAC (0x00 << 5)
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#define DPOT_ADDR_EEPROM (0x01 << 5)
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#define DPOT_ADDR_CMD (0x80)
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#define DPOT_DEC_ALL_6DB (DPOT_ADDR_CMD | (0x4 << 3))
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#define DPOT_INC_ALL_6DB (DPOT_ADDR_CMD | (0x9 << 3))
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#define DPOT_DEC_ALL (DPOT_ADDR_CMD | (0x6 << 3))
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#define DPOT_INC_ALL (DPOT_ADDR_CMD | (0xB << 3))
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#define DPOT_SPI_RDAC 0xB0
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#define DPOT_SPI_EEPROM 0x30
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#define DPOT_SPI_READ_RDAC 0xA0
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#define DPOT_SPI_READ_EEPROM 0x90
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#define DPOT_SPI_DEC_ALL_6DB 0x50
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#define DPOT_SPI_INC_ALL_6DB 0xD0
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#define DPOT_SPI_DEC_ALL 0x70
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#define DPOT_SPI_INC_ALL 0xF0
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/* AD5291/2/3 use special commands */
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#define DPOT_AD5291_RDAC 0x01
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#define DPOT_AD5291_READ_RDAC 0x02
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struct dpot_data;
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struct ad_dpot_bus_ops {
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int (*read_d8) (void *client);
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int (*read_r8d8) (void *client, u8 reg);
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int (*read_r8d16) (void *client, u8 reg);
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int (*write_d8) (void *client, u8 val);
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int (*write_r8d8) (void *client, u8 reg, u8 val);
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int (*write_r8d16) (void *client, u8 reg, u16 val);
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};
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struct ad_dpot_bus_data {
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void *client;
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const struct ad_dpot_bus_ops *bops;
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};
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struct ad_dpot_id {
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char *name;
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unsigned long devid;
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};
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int ad_dpot_probe(struct device *dev, struct ad_dpot_bus_data *bdata, const struct ad_dpot_id *id);
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int ad_dpot_remove(struct device *dev);
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#endif
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