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 /** 56 * struct pca_i2c_bus_settings - The configured PCA i2c bus settings 57 * @mode: Configured i2c bus mode 58 * @tlow: Configured SCL LOW period 59 * @thi: Configured SCL HIGH period 60 * @clock_freq: The configured clock frequency 61 */ 62 struct pca_i2c_bus_settings { 63 int mode; 64 int tlow; 65 int thi; 66 int clock_freq; 67 }; 68 69 struct i2c_algo_pca_data { 70 void *data; /* private low level data */ 71 void (*write_byte) (void *data, int reg, int val); 72 int (*read_byte) (void *data, int reg); 73 int (*wait_for_completion) (void *data); 74 void (*reset_chip) (void *data); 75 /* For PCA9564, use one of the predefined frequencies: 76 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 77 * For PCA9665, use the frequency you want here. */ 78 unsigned int i2c_clock; 79 unsigned int chip; 80 struct pca_i2c_bus_settings bus_settings; 81 }; 82 83 int i2c_pca_add_bus(struct i2c_adapter *); 84 int i2c_pca_add_numbered_bus(struct i2c_adapter *); 85 86 #endif /* _LINUX_I2C_ALGO_PCA_H */ 87