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 55struct 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 67int i2c_pca_add_bus(struct i2c_adapter *); 68int i2c_pca_add_numbered_bus(struct i2c_adapter *); 69 70#endif /* _LINUX_I2C_ALGO_PCA_H */ 71