LXR linux/include/linux/i2c-algo-pca.h

   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        unsigned int                    chip;
  66};
  67
  68int i2c_pca_add_bus(struct i2c_adapter *);
  69int i2c_pca_add_numbered_bus(struct i2c_adapter *);
  70
  71#endif /* _LINUX_I2C_ALGO_PCA_H */
  72