workbench/devs/AHI/Drivers/Envy24/I2C.h

   1 /*
   2     Copyright � 2004-2014, Davy Wentzler. All rights reserved.
   3     $Id$
   4 */
   5
   6 #ifndef I2C_H
   7 #define I2C_H
   8
   9
  10 struct I2C;
  11 struct CardData;
  12
  13 struct I2C_bit_ops {
  14         void (*Start)(struct CardData *card);
  15         void (*Stop)(struct CardData *card);
  16         void (*SetDir_CLK_SDA)(struct CardData *card, int clock, int data);  /* set line direction (0 = write, 1 = read) */
  17         void (*Write_CLK_SDA)(struct CardData *card, int clock, int data);
  18         int (*GetClock)(struct CardData *card);
  19         int (*GetData)(struct CardData *card, int ack);
  20 };
  21
  22 struct I2C {
  23         unsigned short flags; // some private data
  24         unsigned short addr;
  25
  26    struct I2C_bit_ops *bit; // with a pointer, the specific card information can be put in a struct and assigned to this attribute
  27 };
  28
  29
  30 struct I2C *AllocI2C(unsigned char addr);
  31 void FreeI2C(struct I2C *device);
  32
  33 int WriteBytesI2C(struct CardData *card, struct I2C *device, unsigned char *bytes, int count);
  34 int ReadBytesI2C(struct CardData *card, struct I2C *device, unsigned char *bytes, int count);
  35 int ProbeAddressI2C(struct CardData *card, unsigned short addr);
  36
  37 #endif /* I2C_H */