workbench/hidds/hidd.radeon/ati_i2c.c

   1 /*
   2     Copyright © 2004, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #include "ati.h"
   7 #include "radeon.h"
   8 #include "radeon_reg.h"
   9 #include "radeon_macros.h"
  10
  11 #include <aros/symbolsets.h>
  12 #include <aros/debug.h>
  13 #include <proto/exec.h>
  14
  15 #include <hidd/i2c.h>
  16
  17 void METHOD(ATII2C, Hidd_I2C, PutBits)
  18 {
  19     struct ati_staticdata *sd = SD(cl);
  20     ULONG val;
  21
  22     val = INREG(sd->Card.DDCReg) & (ULONG)~(RADEON_GPIO_EN_0 | RADEON_GPIO_EN_1);
  23     val |= (msg->scl ? 0:RADEON_GPIO_EN_1);
  24     val |= (msg->sda ? 0:RADEON_GPIO_EN_0);
  25     OUTREG(sd->Card.DDCReg, val);
  26     val = INREG(sd->Card.DDCReg);
  27 }
  28
  29 void METHOD(ATII2C, Hidd_I2C, GetBits)
  30 {
  31     struct ati_staticdata *sd = SD(cl);
  32
  33     ULONG val = INREG(sd->Card.DDCReg);
  34     *msg->sda = (val & RADEON_GPIO_Y_0) != 0;
  35     *msg->scl = (val & RADEON_GPIO_Y_1) != 0;
  36 }
  37
  38 ADD2LIBS((STRPTR)"i2c.hidd", 0, static struct Library *, I2CBase);