root/drivers/i2c/algos/i2c-algo-pcf.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* -------------------------------------------------------------------- */
   3 /* i2c-pcf8584.h: PCF 8584 global defines                               */
   4 /* -------------------------------------------------------------------- */
   5 /*   Copyright (C) 1996 Simon G. Vogl
   6                    1999 Hans Berglund
   7 
   8  */
   9 /* -------------------------------------------------------------------- */
  10 
  11 /* With some changes from Frodo Looijaard <frodol@dds.nl> */
  12 
  13 #ifndef I2C_PCF8584_H
  14 #define I2C_PCF8584_H 1
  15 
  16 /* ----- Control register bits ---------------------------------------- */
  17 #define I2C_PCF_PIN     0x80
  18 #define I2C_PCF_ESO     0x40
  19 #define I2C_PCF_ES1     0x20
  20 #define I2C_PCF_ES2     0x10
  21 #define I2C_PCF_ENI     0x08
  22 #define I2C_PCF_STA     0x04
  23 #define I2C_PCF_STO     0x02
  24 #define I2C_PCF_ACK     0x01
  25 
  26 #define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
  27 #define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
  28 #define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
  29 #define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
  30 
  31 /* ----- Status register bits ----------------------------------------- */
  32 /*#define I2C_PCF_PIN  0x80    as above*/
  33 
  34 #define I2C_PCF_INI 0x40   /* 1 if not initialized */
  35 #define I2C_PCF_STS 0x20
  36 #define I2C_PCF_BER 0x10
  37 #define I2C_PCF_AD0 0x08
  38 #define I2C_PCF_LRB 0x08
  39 #define I2C_PCF_AAS 0x04
  40 #define I2C_PCF_LAB 0x02
  41 #define I2C_PCF_BB  0x01
  42 
  43 /* ----- Chip clock frequencies --------------------------------------- */
  44 #define I2C_PCF_CLK3    0x00
  45 #define I2C_PCF_CLK443  0x10
  46 #define I2C_PCF_CLK6    0x14
  47 #define I2C_PCF_CLK     0x18
  48 #define I2C_PCF_CLK12   0x1c
  49 
  50 /* ----- transmission frequencies ------------------------------------- */
  51 #define I2C_PCF_TRNS90 0x00     /*  90 kHz */
  52 #define I2C_PCF_TRNS45 0x01     /*  45 kHz */
  53 #define I2C_PCF_TRNS11 0x02     /*  11 kHz */
  54 #define I2C_PCF_TRNS15 0x03     /* 1.5 kHz */
  55 
  56 
  57 /* ----- Access to internal registers according to ES1,ES2 ------------ */
  58 /* they are mapped to the data port ( a0 = 0 )                          */
  59 /* available when ESO == 0 :                                            */
  60 
  61 #define I2C_PCF_OWNADR  0
  62 #define I2C_PCF_INTREG  I2C_PCF_ES2
  63 #define I2C_PCF_CLKREG  I2C_PCF_ES1
  64 
  65 #endif /* I2C_PCF8584_H */