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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _LINUX_I2C_ALGO_PCA_H
2#define _LINUX_I2C_ALGO_PCA_H
3
Marco Aurelio da Costaeff9ec92009-03-28 21:34:44 +01004/* 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*/
Wolfram Sangc01b0832008-04-22 22:16:46 +020012#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
Marco Aurelio da Costaeff9ec92009-03-28 21:34:44 +010028/* 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
Wolfram Sangc01b0832008-04-22 22:16:46 +020048#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070055struct i2c_algo_pca_data {
Wolfram Sangc01b0832008-04-22 22:16:46 +020056 void *data; /* private low level data */
57 void (*write_byte) (void *data, int reg, int val);
58 int (*read_byte) (void *data, int reg);
59 int (*wait_for_completion) (void *data);
60 void (*reset_chip) (void *data);
Marco Aurelio da Costaeff9ec92009-03-28 21:34:44 +010061 /* 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. */
Wolfram Sangc01b0832008-04-22 22:16:46 +020064 unsigned int i2c_clock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065};
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067int i2c_pca_add_bus(struct i2c_adapter *);
Wolfram Sangc01b0832008-04-22 22:16:46 +020068int i2c_pca_add_numbered_bus(struct i2c_adapter *);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70#endif /* _LINUX_I2C_ALGO_PCA_H */