i2c-algo-pca.h (2956B)
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/** 57 * struct pca_i2c_bus_settings - The configured PCA i2c bus settings 58 * @mode: Configured i2c bus mode 59 * @tlow: Configured SCL LOW period 60 * @thi: Configured SCL HIGH period 61 * @clock_freq: The configured clock frequency 62 */ 63struct pca_i2c_bus_settings { 64 int mode; 65 int tlow; 66 int thi; 67 int clock_freq; 68}; 69 70struct i2c_algo_pca_data { 71 void *data; /* private low level data */ 72 void (*write_byte) (void *data, int reg, int val); 73 int (*read_byte) (void *data, int reg); 74 int (*wait_for_completion) (void *data); 75 void (*reset_chip) (void *data); 76 /* For PCA9564, use one of the predefined frequencies: 77 * 330000, 288000, 217000, 146000, 88000, 59000, 44000, 36000 78 * For PCA9665, use the frequency you want here. */ 79 unsigned int i2c_clock; 80 unsigned int chip; 81 struct pca_i2c_bus_settings bus_settings; 82}; 83 84int i2c_pca_add_bus(struct i2c_adapter *); 85int i2c_pca_add_numbered_bus(struct i2c_adapter *); 86 87#endif /* _LINUX_I2C_ALGO_PCA_H */