1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_I2C_ALGO_PCA_H 3 #define _LINUX_I2C_ALGO_PCA_H 4 5 /* Chips known to the pca algo */ 6 #define I2C_PCA_CHIP_9564 0x00 7 #define I2C_PCA_CHIP_9665 0x01 8 9 /* Internal period for PCA9665 oscilator */ 10 #define I2C_PCA_OSC_PER 3 /* e10-8s */ 11 12 /* Clock speeds for the bus for PCA9564*/ 13 #define I2C_PCA_CON_330kHz 0x00 14 #define I2C_PCA_CON_288kHz 0x01 15 #define I2C_PCA_CON_217kHz 0x02 16 #define I2C_PCA_CON_146kHz 0x03 17 #define I2C_PCA_CON_88kHz 0x04 18 #define I2C_PCA_CON_59kHz 0x05 19 #define I2C_PCA_CON_44kHz 0x06 20 #define I2C_PCA_CON_36kHz 0x07 21 22 /* PCA9564 registers */ 23 #define I2C_PCA_STA 0x00 /* STATUS Read Only */ 24 #define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */ 25 #define I2C_PCA_DAT 0x01 /* DATA Read/Write */ 26 #define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */ 27 #define I2C_PCA_CON 0x03 /* CONTROL Read/Write */ 28 29 /* PCA9665 registers */ 30 #define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */ 31 #define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */ 32 33 /* PCA9665 indirect registers */ 34 #define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */ 35 #define I2C_PCA_IADR 0x01 /* OWN ADR */ 36 #define I2C_PCA_ISCLL 0x02 /* SCL LOW period */ 37 #define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */ 38 #define I2C_PCA_ITO 0x04 /* TIMEOUT */ 39 #define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */ 40 #define I2C_PCA_IMODE 0x06 /* I2C Bus mode */ 41 42 /* PCA9665 I2C bus mode */ 43 #define I2C_PCA_MODE_STD 0x00 /* Standard mode */ 44 #define I2C_PCA_MODE_FAST 0x01 /* Fast mode */ 45 #define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */ 46 #define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */ 47 48 49 #define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */ 50 #define I2C_PCA_CON_ENSIO 0x40 /* Enable */ 51 #define I2C_PCA_CON_STA 0x20 /* Start */ 52 #define I2C_PCA_CON_STO 0x10 /* Stop */ 53 #define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */ 54 #define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */ 55 56 struct i2c_algo_pca_data { 57 void *data; /* private low level data */ 58 void (*write_byte) (void *data, int reg, int val); 59 int (*read_byte) (void *data, int reg); 60 int (*wait_for_completion) (void *data); 61 void (*reset_chip) (void *data); 62 /* For PCA9564, use one of the predefined frequencies: 63 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 64 * For PCA9665, use the frequency you want here. */ 65 unsigned int i2c_clock; 66 unsigned int chip; 67 }; 68 69 int i2c_pca_add_bus(struct i2c_adapter *); 70 int i2c_pca_add_numbered_bus(struct i2c_adapter *); 71 72 #endif /* _LINUX_I2C_ALGO_PCA_H */ 73
