1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_I2C_ALGO_PCA_H
3#define _LINUX_I2C_ALGO_PCA_H
4
5/* Chips known to the pca algo */
6#define I2C_PCA_CHIP_9564 0x00
7#define I2C_PCA_CHIP_9665 0x01
8
9/* Internal period for PCA9665 oscilator */
10#define I2C_PCA_OSC_PER 3 /* e10-8s */
11
12/* Clock speeds for the bus for PCA9564*/
13#define I2C_PCA_CON_330kHz 0x00
14#define I2C_PCA_CON_288kHz 0x01
15#define I2C_PCA_CON_217kHz 0x02
16#define I2C_PCA_CON_146kHz 0x03
17#define I2C_PCA_CON_88kHz 0x04
18#define I2C_PCA_CON_59kHz 0x05
19#define I2C_PCA_CON_44kHz 0x06
20#define I2C_PCA_CON_36kHz 0x07
21
22/* PCA9564 registers */
23#define I2C_PCA_STA 0x00 /* STATUS Read Only */
24#define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */
25#define I2C_PCA_DAT 0x01 /* DATA Read/Write */
26#define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */
27#define I2C_PCA_CON 0x03 /* CONTROL Read/Write */
28
29/* PCA9665 registers */
30#define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */
31#define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */
32
33/* PCA9665 indirect registers */
34#define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */
35#define I2C_PCA_IADR 0x01 /* OWN ADR */
36#define I2C_PCA_ISCLL 0x02 /* SCL LOW period */
37#define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */
38#define I2C_PCA_ITO 0x04 /* TIMEOUT */
39#define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */
40#define I2C_PCA_IMODE 0x06 /* I2C Bus mode */
41
42/* PCA9665 I2C bus mode */
43#define I2C_PCA_MODE_STD 0x00 /* Standard mode */
44#define I2C_PCA_MODE_FAST 0x01 /* Fast mode */
45#define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */
46#define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */
47
48
49#define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */
50#define I2C_PCA_CON_ENSIO 0x40 /* Enable */
51#define I2C_PCA_CON_STA 0x20 /* Start */
52#define I2C_PCA_CON_STO 0x10 /* Stop */
53#define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */
54#define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */
55
56struct i2c_algo_pca_data {
57 void *data; /* private low level data */
58 void (*write_byte) (void *data, int reg, int val);
59 int (*read_byte) (void *data, int reg);
60 int (*wait_for_completion) (void *data);
61 void (*reset_chip) (void *data);
62 /* For PCA9564, use one of the predefined frequencies:
63 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
64 * For PCA9665, use the frequency you want here. */
65 unsigned int i2c_clock;
66 unsigned int chip;
67};
68
69int i2c_pca_add_bus(struct i2c_adapter *);
70int i2c_pca_add_numbered_bus(struct i2c_adapter *);
71
72#endif /* _LINUX_I2C_ALGO_PCA_H */
73