tda8425.c   [plain text]

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include "xf86.h"
#include "xf86i2c.h"
#include "tda8425.h"
#include "i2c_def.h"

#define TDA8425(a,b)	{ \
		data[0]=a; \
		data[1]=b; \
		I2C_WriteRead(&(t->d), data, 2, NULL, 0); \
		}

TDA8425Ptr Detect_tda8425(I2CBusPtr b, I2CSlaveAddr addr, Bool force)
{
  TDA8425Ptr t;
  
  t = xcalloc(1, sizeof(TDA8425Rec));
  if(t == NULL) return NULL;
  t->d.DevName = "TDA8425 BTSC Stereo Audio Processor";
  t->d.SlaveAddr = addr;
  t->d.pI2CBus = b;
  t->d.NextDev = NULL;
  t->d.StartTimeout = b->StartTimeout;
  t->d.BitTimeout = b->BitTimeout;
  t->d.AcknTimeout = b->AcknTimeout;
  t->d.ByteTimeout = b->ByteTimeout;
  
  if(!force && !I2CProbeAddress(b, addr))
  {
     xfree(t);
     return NULL;
  }
  
  /* set default parameters */
  if(!I2CDevInit(&(t->d)))
  {
     xfree(t);
     return NULL;
  }

  return t;  
}

Bool tda8425_init(TDA8425Ptr t)
{
  t->stereo = 3; 	/* 3 = Spacial 2 = Linear 1 = Pseudo 0 = Forced mono */
  t->v_left = 0xFF; 	/* FF - C0 */
  t->v_right = 0xFF; 	/* FF - C0 */
  t->bass = 0xF6;	/* 0xFF - 0xF0 */
  t->treble = 0xF6;	/* 0xFF - 0xF0 */
  t->src_sel = 3;	/* 3 - stereo */
  t->mute = TRUE;
  t->mux = 0;           /* 0 - source one, 1 -source 2 */
  
  tda8425_setaudio(t);
  return TRUE;
}

void tda8425_setaudio(TDA8425Ptr t)
{
    I2CByte data[2];

    TDA8425(0x00, t->v_left ); 
    TDA8425(0x01, t->v_right );
    TDA8425(0x02, t->bass ); 
    TDA8425(0x03, t->treble );
    TDA8425(0x08, 0xC0 | (t->mute ? 0x20 : 0x0) | (t->stereo << 3) | (t->src_sel << 1) |
	    t->mux); 
}

void tda8425_mute(TDA8425Ptr t, Bool mute)
{
   t->mute = mute;
   tda8425_setaudio(t);
}