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

   1 /* -------------------------------------------------------------------- */
   2 /* i2c-pcf8584.h: PCF 8584 global defines                               */
   3 /* -------------------------------------------------------------------- */
   4 /*   Copyright (C) 1996 Simon G. Vogl
   5                    1999 Hans Berglund
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License
  18     along with this program; if not, write to the Free Software
  19     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.           */
  20 /* -------------------------------------------------------------------- */
  21
  22 /* With some changes from Frodo Looijaard <frodol@dds.nl> */
  23
  24 #ifndef I2C_PCF8584_H
  25 #define I2C_PCF8584_H 1
  26
  27 /* ----- Control register bits ---------------------------------------- */
  28 #define I2C_PCF_PIN     0x80
  29 #define I2C_PCF_ESO     0x40
  30 #define I2C_PCF_ES1     0x20
  31 #define I2C_PCF_ES2     0x10
  32 #define I2C_PCF_ENI     0x08
  33 #define I2C_PCF_STA     0x04
  34 #define I2C_PCF_STO     0x02
  35 #define I2C_PCF_ACK     0x01
  36
  37 #define I2C_PCF_START    (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
  38 #define I2C_PCF_STOP     (I2C_PCF_PIN | I2C_PCF_ESO | I2C_PCF_STO | I2C_PCF_ACK)
  39 #define I2C_PCF_REPSTART (              I2C_PCF_ESO | I2C_PCF_STA | I2C_PCF_ACK)
  40 #define I2C_PCF_IDLE     (I2C_PCF_PIN | I2C_PCF_ESO               | I2C_PCF_ACK)
  41
  42 /* ----- Status register bits ----------------------------------------- */
  43 /*#define I2C_PCF_PIN  0x80    as above*/
  44
  45 #define I2C_PCF_INI 0x40   /* 1 if not initialized */
  46 #define I2C_PCF_STS 0x20
  47 #define I2C_PCF_BER 0x10
  48 #define I2C_PCF_AD0 0x08
  49 #define I2C_PCF_LRB 0x08
  50 #define I2C_PCF_AAS 0x04
  51 #define I2C_PCF_LAB 0x02
  52 #define I2C_PCF_BB  0x01
  53
  54 /* ----- Chip clock frequencies --------------------------------------- */
  55 #define I2C_PCF_CLK3    0x00
  56 #define I2C_PCF_CLK443  0x10
  57 #define I2C_PCF_CLK6    0x14
  58 #define I2C_PCF_CLK     0x18
  59 #define I2C_PCF_CLK12   0x1c
  60
  61 /* ----- transmission frequencies ------------------------------------- */
  62 #define I2C_PCF_TRNS90 0x00     /*  90 kHz */
  63 #define I2C_PCF_TRNS45 0x01     /*  45 kHz */
  64 #define I2C_PCF_TRNS11 0x02     /*  11 kHz */
  65 #define I2C_PCF_TRNS15 0x03     /* 1.5 kHz */
  66
  67
  68 /* ----- Access to internal registers according to ES1,ES2 ------------ */
  69 /* they are mapped to the data port ( a0 = 0 )                          */
  70 /* available when ESO == 0 :                                            */
  71
  72 #define I2C_PCF_OWNADR  0
  73 #define I2C_PCF_INTREG  I2C_PCF_ES2
  74 #define I2C_PCF_CLKREG  I2C_PCF_ES1
  75
  76 #endif /* I2C_PCF8584_H */