i2c-algo-pca.h

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#ifndef _LINUX_I2C_ALGO_PCA_H
#define _LINUX_I2C_ALGO_PCA_H

/* Chips known to the pca algo */
#define I2C_PCA_CHIP_9564   0x00
#define I2C_PCA_CHIP_9665   0x01

/* Internal period for PCA9665 oscilator */
#define I2C_PCA_OSC_PER     3 /* e10-8s */

/* Clock speeds for the bus for PCA9564*/
#define I2C_PCA_CON_330kHz  0x00
#define I2C_PCA_CON_288kHz  0x01
#define I2C_PCA_CON_217kHz  0x02
#define I2C_PCA_CON_146kHz  0x03
#define I2C_PCA_CON_88kHz   0x04
#define I2C_PCA_CON_59kHz   0x05
#define I2C_PCA_CON_44kHz   0x06
#define I2C_PCA_CON_36kHz   0x07

/* PCA9564 registers */
#define I2C_PCA_STA     0x00 /* STATUS  Read Only  */
#define I2C_PCA_TO      0x00 /* TIMEOUT Write Only */
#define I2C_PCA_DAT     0x01 /* DATA    Read/Write */
#define I2C_PCA_ADR     0x02 /* OWN ADR Read/Write */
#define I2C_PCA_CON     0x03 /* CONTROL Read/Write */

/* PCA9665 registers */
#define I2C_PCA_INDPTR          0x00 /* INDIRECT Pointer Write Only */
#define I2C_PCA_IND             0x02 /* INDIRECT Read/Write */

/* PCA9665 indirect registers */
#define I2C_PCA_ICOUNT          0x00 /* Byte Count for buffered mode */
#define I2C_PCA_IADR            0x01 /* OWN ADR */
#define I2C_PCA_ISCLL           0x02 /* SCL LOW period */
#define I2C_PCA_ISCLH           0x03 /* SCL HIGH period */
#define I2C_PCA_ITO             0x04 /* TIMEOUT */
#define I2C_PCA_IPRESET         0x05 /* Parallel bus reset */
#define I2C_PCA_IMODE           0x06 /* I2C Bus mode */

/* PCA9665 I2C bus mode */
#define I2C_PCA_MODE_STD        0x00 /* Standard mode */
#define I2C_PCA_MODE_FAST       0x01 /* Fast mode */
#define I2C_PCA_MODE_FASTP      0x02 /* Fast Plus mode */
#define I2C_PCA_MODE_TURBO      0x03 /* Turbo mode */


#define I2C_PCA_CON_AA      0x80 /* Assert Acknowledge */
#define I2C_PCA_CON_ENSIO   0x40 /* Enable */
#define I2C_PCA_CON_STA     0x20 /* Start */
#define I2C_PCA_CON_STO     0x10 /* Stop */
#define I2C_PCA_CON_SI      0x08 /* Serial Interrupt */
#define I2C_PCA_CON_CR      0x07 /* Clock Rate (MASK) */

struct i2c_algo_pca_data {
    void                *data;  /* private low level data */
    void (*write_byte)      (void *data, int reg, int val);
    int  (*read_byte)       (void *data, int reg);
    int  (*wait_for_completion) (void *data);
    void (*reset_chip)      (void *data);
    /* For PCA9564, use one of the predefined frequencies:
     * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000
     * For PCA9665, use the frequency you want here. */
    unsigned int            i2c_clock;
    unsigned int            chip;
};

int i2c_pca_add_bus(struct i2c_adapter *);
int i2c_pca_add_numbered_bus(struct i2c_adapter *);

#endif /* _LINUX_I2C_ALGO_PCA_H */