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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 
55 struct i2c_algo_pca_data {
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);
59 	int  (*wait_for_completion)	(void *data);
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 };
66 
67 int i2c_pca_add_bus(struct i2c_adapter *);
68 int i2c_pca_add_numbered_bus(struct i2c_adapter *);
69 
70 #endif /* _LINUX_I2C_ALGO_PCA_H */
71