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i2c-algo-pca.h
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1 #ifndef _LINUX_I2C_ALGO_PCA_H
2 #define _LINUX_I2C_ALGO_PCA_H
3 
4 /* Chips known to the pca algo */
5 #define I2C_PCA_CHIP_9564 0x00
6 #define I2C_PCA_CHIP_9665 0x01
7 
8 /* Internal period for PCA9665 oscilator */
9 #define I2C_PCA_OSC_PER 3 /* e10-8s */
10 
11 /* Clock speeds for the bus for PCA9564*/
12 #define I2C_PCA_CON_330kHz 0x00
13 #define I2C_PCA_CON_288kHz 0x01
14 #define I2C_PCA_CON_217kHz 0x02
15 #define I2C_PCA_CON_146kHz 0x03
16 #define I2C_PCA_CON_88kHz 0x04
17 #define I2C_PCA_CON_59kHz 0x05
18 #define I2C_PCA_CON_44kHz 0x06
19 #define I2C_PCA_CON_36kHz 0x07
20 
21 /* PCA9564 registers */
22 #define I2C_PCA_STA 0x00 /* STATUS Read Only */
23 #define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */
24 #define I2C_PCA_DAT 0x01 /* DATA Read/Write */
25 #define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */
26 #define I2C_PCA_CON 0x03 /* CONTROL Read/Write */
27 
28 /* PCA9665 registers */
29 #define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */
30 #define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */
31 
32 /* PCA9665 indirect registers */
33 #define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */
34 #define I2C_PCA_IADR 0x01 /* OWN ADR */
35 #define I2C_PCA_ISCLL 0x02 /* SCL LOW period */
36 #define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */
37 #define I2C_PCA_ITO 0x04 /* TIMEOUT */
38 #define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */
39 #define I2C_PCA_IMODE 0x06 /* I2C Bus mode */
40 
41 /* PCA9665 I2C bus mode */
42 #define I2C_PCA_MODE_STD 0x00 /* Standard mode */
43 #define I2C_PCA_MODE_FAST 0x01 /* Fast mode */
44 #define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */
45 #define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */
46 
47 
48 #define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */
49 #define I2C_PCA_CON_ENSIO 0x40 /* Enable */
50 #define I2C_PCA_CON_STA 0x20 /* Start */
51 #define I2C_PCA_CON_STO 0x10 /* Stop */
52 #define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */
53 #define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */
54 
56  void *data; /* private low level data */
57  void (*write_byte) (void *data, int reg, int val);
58  int (*read_byte) (void *data, int reg);
60  void (*reset_chip) (void *data);
61  /* For PCA9564, use one of the predefined frequencies:
62  * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
63  * For PCA9665, use the frequency you want here. */
64  unsigned int i2c_clock;
65  unsigned int chip;
66 };
67 
68 int i2c_pca_add_bus(struct i2c_adapter *);
70 
71 #endif /* _LINUX_I2C_ALGO_PCA_H */