1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 21da177e4SLinus Torvalds #ifndef _LINUX_I2C_ALGO_PCA_H 31da177e4SLinus Torvalds #define _LINUX_I2C_ALGO_PCA_H 41da177e4SLinus Torvalds 5eff9ec95SMarco Aurelio da Costa /* Chips known to the pca algo */ 6eff9ec95SMarco Aurelio da Costa #define I2C_PCA_CHIP_9564 0x00 7eff9ec95SMarco Aurelio da Costa #define I2C_PCA_CHIP_9665 0x01 8eff9ec95SMarco Aurelio da Costa 9eff9ec95SMarco Aurelio da Costa /* Internal period for PCA9665 oscilator */ 10eff9ec95SMarco Aurelio da Costa #define I2C_PCA_OSC_PER 3 /* e10-8s */ 11eff9ec95SMarco Aurelio da Costa 12eff9ec95SMarco Aurelio da Costa /* Clock speeds for the bus for PCA9564*/ 13c01b0831SWolfram Sang #define I2C_PCA_CON_330kHz 0x00 14c01b0831SWolfram Sang #define I2C_PCA_CON_288kHz 0x01 15c01b0831SWolfram Sang #define I2C_PCA_CON_217kHz 0x02 16c01b0831SWolfram Sang #define I2C_PCA_CON_146kHz 0x03 17c01b0831SWolfram Sang #define I2C_PCA_CON_88kHz 0x04 18c01b0831SWolfram Sang #define I2C_PCA_CON_59kHz 0x05 19c01b0831SWolfram Sang #define I2C_PCA_CON_44kHz 0x06 20c01b0831SWolfram Sang #define I2C_PCA_CON_36kHz 0x07 21c01b0831SWolfram Sang 22c01b0831SWolfram Sang /* PCA9564 registers */ 23c01b0831SWolfram Sang #define I2C_PCA_STA 0x00 /* STATUS Read Only */ 24c01b0831SWolfram Sang #define I2C_PCA_TO 0x00 /* TIMEOUT Write Only */ 25c01b0831SWolfram Sang #define I2C_PCA_DAT 0x01 /* DATA Read/Write */ 26c01b0831SWolfram Sang #define I2C_PCA_ADR 0x02 /* OWN ADR Read/Write */ 27c01b0831SWolfram Sang #define I2C_PCA_CON 0x03 /* CONTROL Read/Write */ 28c01b0831SWolfram Sang 29eff9ec95SMarco Aurelio da Costa /* PCA9665 registers */ 30eff9ec95SMarco Aurelio da Costa #define I2C_PCA_INDPTR 0x00 /* INDIRECT Pointer Write Only */ 31eff9ec95SMarco Aurelio da Costa #define I2C_PCA_IND 0x02 /* INDIRECT Read/Write */ 32eff9ec95SMarco Aurelio da Costa 33eff9ec95SMarco Aurelio da Costa /* PCA9665 indirect registers */ 34eff9ec95SMarco Aurelio da Costa #define I2C_PCA_ICOUNT 0x00 /* Byte Count for buffered mode */ 35eff9ec95SMarco Aurelio da Costa #define I2C_PCA_IADR 0x01 /* OWN ADR */ 36eff9ec95SMarco Aurelio da Costa #define I2C_PCA_ISCLL 0x02 /* SCL LOW period */ 37eff9ec95SMarco Aurelio da Costa #define I2C_PCA_ISCLH 0x03 /* SCL HIGH period */ 38eff9ec95SMarco Aurelio da Costa #define I2C_PCA_ITO 0x04 /* TIMEOUT */ 39eff9ec95SMarco Aurelio da Costa #define I2C_PCA_IPRESET 0x05 /* Parallel bus reset */ 40eff9ec95SMarco Aurelio da Costa #define I2C_PCA_IMODE 0x06 /* I2C Bus mode */ 41eff9ec95SMarco Aurelio da Costa 42eff9ec95SMarco Aurelio da Costa /* PCA9665 I2C bus mode */ 43eff9ec95SMarco Aurelio da Costa #define I2C_PCA_MODE_STD 0x00 /* Standard mode */ 44eff9ec95SMarco Aurelio da Costa #define I2C_PCA_MODE_FAST 0x01 /* Fast mode */ 45eff9ec95SMarco Aurelio da Costa #define I2C_PCA_MODE_FASTP 0x02 /* Fast Plus mode */ 46eff9ec95SMarco Aurelio da Costa #define I2C_PCA_MODE_TURBO 0x03 /* Turbo mode */ 47eff9ec95SMarco Aurelio da Costa 48eff9ec95SMarco Aurelio da Costa 49c01b0831SWolfram Sang #define I2C_PCA_CON_AA 0x80 /* Assert Acknowledge */ 50c01b0831SWolfram Sang #define I2C_PCA_CON_ENSIO 0x40 /* Enable */ 51c01b0831SWolfram Sang #define I2C_PCA_CON_STA 0x20 /* Start */ 52c01b0831SWolfram Sang #define I2C_PCA_CON_STO 0x10 /* Stop */ 53c01b0831SWolfram Sang #define I2C_PCA_CON_SI 0x08 /* Serial Interrupt */ 54c01b0831SWolfram Sang #define I2C_PCA_CON_CR 0x07 /* Clock Rate (MASK) */ 55c01b0831SWolfram Sang 56*0a355aebSEvan Nimmo /** 57*0a355aebSEvan Nimmo * struct pca_i2c_bus_settings - The configured PCA i2c bus settings 58*0a355aebSEvan Nimmo * @mode: Configured i2c bus mode 59*0a355aebSEvan Nimmo * @tlow: Configured SCL LOW period 60*0a355aebSEvan Nimmo * @thi: Configured SCL HIGH period 61*0a355aebSEvan Nimmo * @clock_freq: The configured clock frequency 62*0a355aebSEvan Nimmo */ 63*0a355aebSEvan Nimmo struct pca_i2c_bus_settings { 64*0a355aebSEvan Nimmo int mode; 65*0a355aebSEvan Nimmo int tlow; 66*0a355aebSEvan Nimmo int thi; 67*0a355aebSEvan Nimmo int clock_freq; 68*0a355aebSEvan Nimmo }; 69*0a355aebSEvan Nimmo 701da177e4SLinus Torvalds struct i2c_algo_pca_data { 71c01b0831SWolfram Sang void *data; /* private low level data */ 72c01b0831SWolfram Sang void (*write_byte) (void *data, int reg, int val); 73c01b0831SWolfram Sang int (*read_byte) (void *data, int reg); 74c01b0831SWolfram Sang int (*wait_for_completion) (void *data); 75c01b0831SWolfram Sang void (*reset_chip) (void *data); 76eff9ec95SMarco Aurelio da Costa /* For PCA9564, use one of the predefined frequencies: 77eff9ec95SMarco Aurelio da Costa * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 78eff9ec95SMarco Aurelio da Costa * For PCA9665, use the frequency you want here. */ 79c01b0831SWolfram Sang unsigned int i2c_clock; 80a76e7c68SThomas Kavanagh unsigned int chip; 81*0a355aebSEvan Nimmo struct pca_i2c_bus_settings bus_settings; 821da177e4SLinus Torvalds }; 831da177e4SLinus Torvalds 841da177e4SLinus Torvalds int i2c_pca_add_bus(struct i2c_adapter *); 85c01b0831SWolfram Sang int i2c_pca_add_numbered_bus(struct i2c_adapter *); 861da177e4SLinus Torvalds 871da177e4SLinus Torvalds #endif /* _LINUX_I2C_ALGO_PCA_H */ 88