hwdrv_apci3120.c

最新版comedi的源码

		outw(APCI3120_ADD_ON_MWAR_HIGH,devpriv->i_IobaseAddon+0);
		outw((devpriv->ul_DmaBufferHw[0]/65536),devpriv->i_IobaseAddon+2);

    		//4
		// amount of bytes to be transfered  set transfer count
		// used ADDON MWTC register
        	//commented testing		outl(devpriv->ui_DmaBufferUsesize[0], devpriv->i_IobaseAddon+AMCC_OP_REG_AMWTC);

		 /**************************/
		 /* Nbr of acquisition LOW */
		 /**************************/	
		outw(APCI3120_ADD_ON_MWTC_LOW,devpriv->i_IobaseAddon + 0);
		outw((devpriv->ui_DmaBufferUsesize[0] & 0xFFFF),devpriv->i_IobaseAddon + 2);

		 /***************************/
		 /* Nbr of acquisition HIGH */
		 /***************************/
		outw(APCI3120_ADD_ON_MWTC_HIGH,devpriv->i_IobaseAddon + 0);
		outw((devpriv->ui_DmaBufferUsesize[0]/65536),devpriv->i_IobaseAddon + 2);
		
	    	//5
		// To configure A2P FIFO
	    	// testing outl( FIFO_ADVANCE_ON_BYTE_2,devpriv->i_IobaseAmcc+AMCC_OP_REG_INTCSR);  

		/******************/
		/* A2P FIFO RESET */
		/******************/
		// TO VERIFY
		//BEGIN JK 07.05.04: Comparison between WIN32 and Linux driver		
		outl(0x04000000UL, devpriv->i_IobaseAmcc+AMCC_OP_REG_MCSR);	
		//END JK 07.05.04: Comparison between WIN32 and Linux driver	
		
		//6 
		//ENABLE A2P FIFO WRITE AND ENABLE AMWEN 
		// AMWEN_ENABLE | A2P_FIFO_WRITE_ENABLE (0x01|0x02)=0x03
		//BEGIN JK 07.05.04: Comparison between WIN32 and Linux driver						
		//outw(3,devpriv->i_IobaseAddon + 4);
		//END JK 07.05.04: Comparison between WIN32 and Linux driver	

		//7
        //initialise end of dma interrupt  AINT_WRITE_COMPL = ENABLE_WRITE_TC_INT(ADDI)    
		/***************************************************/
		/* A2P FIFO CONFIGURATE, END OF DMA INTERRUPT INIT */
		/***************************************************/        
		outl((APCI3120_FIFO_ADVANCE_ON_BYTE_2 | APCI3120_ENABLE_WRITE_TC_INT), 
		      devpriv->i_IobaseAmcc+AMCC_OP_REG_INTCSR);	

		//BEGIN JK 07.05.04: Comparison between WIN32 and Linux driver						      
		/******************************************/
		/* ENABLE A2P FIFO WRITE AND ENABLE AMWEN */
		/******************************************/		      
		outw(3,devpriv->i_IobaseAddon + 4);
		//END JK 07.05.04: Comparison between WIN32 and Linux driver		
		
		/******************/
		/* A2P FIFO RESET */
		/******************/
		//BEGIN JK 07.05.04: Comparison between WIN32 and Linux driver		
		outl(0x04000000UL, devpriv->i_IobaseAmcc+APCI3120_AMCC_OP_MCSR);	
		//END JK 07.05.04: Comparison between WIN32 and Linux driver	
	  }
      
	 if ((devpriv->us_UseDma==APCI3120_DISABLE) && !devpriv->b_AiContinuous) 
	  {      
            	// set gate 2   to start conversion
		devpriv->us_OutputRegister = devpriv->us_OutputRegister | APCI3120_ENABLE_TIMER2;
	        outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);     
	  }         


	switch(mode)
	  {
	  case 1:
	          // set gate 0   to start conversion
		  devpriv->us_OutputRegister = devpriv->us_OutputRegister | APCI3120_ENABLE_TIMER0;
		  outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);     
		  break;
          case 2:
	          // set  gate 0 and gate 1
		  devpriv->us_OutputRegister= devpriv->us_OutputRegister  | APCI3120_ENABLE_TIMER1;
		  devpriv->us_OutputRegister= devpriv->us_OutputRegister  | APCI3120_ENABLE_TIMER0;
		  outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);   
		  break;
		
	  }
       
	return 0;

}

/*
+----------------------------------------------------------------------------+
| 			INTERNAL FUNCTIONS						                 |
+----------------------------------------------------------------------------+
*/


/*
+----------------------------------------------------------------------------+
| Function name     : int i_APCI3120_Reset(comedi_device *dev)               |
|                                        									 |
|                                            						         |
+----------------------------------------------------------------------------+
| Task              : Hardware reset function   						     |
|                     										                 |
+----------------------------------------------------------------------------+
| Input Parameters  : 	comedi_device *dev									 |
|                     														 |
|                                                 					         |
+----------------------------------------------------------------------------+
| Return Value      :              					                         |
|                    													     |
+----------------------------------------------------------------------------+
*/

int i_APCI3120_Reset(comedi_device *dev)
{
	unsigned int i;
	unsigned short us_TmpValue;
	
	devpriv->b_AiCyclicAcquisition=APCI3120_DISABLE;
	devpriv->b_EocEosInterrupt=APCI3120_DISABLE;
        devpriv->b_InterruptMode=APCI3120_EOC_MODE;
	devpriv->ui_EocEosConversionTime=0; // set eoc eos conv time to 0
	devpriv->b_OutputMemoryStatus =0;

        // variables used in timer subdevice
	devpriv->b_Timer2Mode=0; 
	devpriv->b_Timer2Interrupt=0;	  
	devpriv->b_ExttrigEnable=0; // Disable ext trigger

	/* Disable all interrupts, watchdog for the anolog output */   
	devpriv->b_ModeSelectRegister=0;
  	outb(devpriv->b_ModeSelectRegister,dev->iobase+APCI3120_WRITE_MODE_SELECT);

	// Disables all counters, ext trigger and clears PA, PR 
	devpriv->us_OutputRegister=0;
	outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);

	//Code to set the all anolog o/p channel to 0v
	//8191 is decimal value for zero(0 v)volt in bipolar mode(default)
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_1, dev->iobase+APCI3120_ANALOG_OUTPUT_1);//channel 1
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_2, dev->iobase+APCI3120_ANALOG_OUTPUT_1);//channel 2
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_3, dev->iobase+APCI3120_ANALOG_OUTPUT_1);//channel 3
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_4, dev->iobase+APCI3120_ANALOG_OUTPUT_1);//channel 4
	
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_5, dev->iobase+APCI3120_ANALOG_OUTPUT_2);//channel 5
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_6, dev->iobase+APCI3120_ANALOG_OUTPUT_2);//channel 6
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_7, dev->iobase+APCI3120_ANALOG_OUTPUT_2);//channel 7
	outw(8191|APCI3120_ANALOG_OP_CHANNEL_8, dev->iobase+APCI3120_ANALOG_OUTPUT_2);//channel 8

	//  Reset digital output to L0W 
	
//ES05	outb(0x0,dev->iobase+APCI3120_DIGITAL_OUTPUT);	
	udelay(10);

	inw(dev->iobase+0);						//make a dummy read
	inb(dev->iobase+APCI3120_RESET_FIFO); // flush FIFO
	inw(dev->iobase+APCI3120_RD_STATUS);	// flush A/D status register

	//code to reset the RAM sequence 	
	for (i=0;i<16;i++)
	{ 
		us_TmpValue = i<<8; //select the location
		outw(us_TmpValue,dev->iobase+APCI3120_SEQ_RAM_ADDRESS);
	}
        return 0;
}




/*
+----------------------------------------------------------------------------+
| Function name     : int i_APCI3120_SetupChannelList(comedi_device * dev,   |
|                     comedi_subdevice * s, int n_chan,unsigned int *chanlist|
|			  ,char check)											 |
|                                            						         |
+----------------------------------------------------------------------------+
| Task              :This function will first check channel list is ok or not|
|and then initialize the sequence RAM with the polarity, Gain,Channel number |
|If the last argument of function "check"is 1 then it only checks the channel|
|list is ok or not.												     		 |
|                     										                 |
+----------------------------------------------------------------------------+
| Input Parameters  : comedi_device * dev									 |
|                     comedi_subdevice * s									 |
|                     int n_chan                   					         |
			  unsigned int *chanlist
			  char check
+----------------------------------------------------------------------------+
| Return Value      :              					                         |
|                    													     |
+----------------------------------------------------------------------------+
*/

int i_APCI3120_SetupChannelList(comedi_device * dev, comedi_subdevice * s, int n_chan, unsigned int *chanlist,char check) 
{
       unsigned int i;//, differencial=0, bipolar=0;       
       unsigned int gain;
       unsigned short us_TmpValue;
       
       /* correct channel and range number check itself comedi/range.c */
       if (n_chan<1) 
	 {
	   if (!check) comedi_error(dev,"range/channel list is empty!");
	      return 0;             
	 }

       // All is ok, so we can setup channel/range list
       if (check) return 1;

       //Code  to set the PA and PR...Here it set PA to 0..
       devpriv->us_OutputRegister=devpriv->us_OutputRegister & APCI3120_CLEAR_PA_PR;
       devpriv->us_OutputRegister= ((n_chan-1) & 0xf)<<8;
       outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);

       for (i=0; i<n_chan; i++) 
	 {  
	      // store range list to card
	      us_TmpValue=CR_CHAN(chanlist[i]);	// get channel number;
	      
	      if (CR_RANGE(chanlist[i])<APCI3120_BIPOLAR_RANGES)
		{
		   us_TmpValue&=((~APCI3120_UNIPOLAR)&0xff);	// set bipolar
		}
	      else 
	       {
		   us_TmpValue|=APCI3120_UNIPOLAR; // enable unipolar......		
	       }
	      
	      gain=CR_RANGE(chanlist[i]);		// get gain number              
	      us_TmpValue|=((gain & 0x03)<<4);	//<<4 for G0 and G1 bit in RAM 
	      us_TmpValue|= i<<8;					//To select the RAM LOCATION....              
	      outw(us_TmpValue,dev->iobase+APCI3120_SEQ_RAM_ADDRESS);	    

	      
	      printk ("\n Gain = %i", (((unsigned char) CR_RANGE(chanlist[i]) & 0x03) << 2));
	      printk ("\n Channel = %i", CR_CHAN(chanlist[i]));
	      printk ("\n Polarity = %i", us_TmpValue & APCI3120_UNIPOLAR);
	 }
       return 1; // we can serve this with scan logic
}






/*
+----------------------------------------------------------------------------+
| Function name     :	int i_APCI3120_ExttrigEnable(comedi_device * dev)    |
|                                        									 |
|                                            						         |
+----------------------------------------------------------------------------+
| Task              : 	Enable the external trigger						     |
|                     										                 |
+----------------------------------------------------------------------------+
| Input Parameters  : 	comedi_device * dev									 |
|                     														 |
|                                                 					         |
+----------------------------------------------------------------------------+
| Return Value      :      0        					                         |
|                    													     |
+----------------------------------------------------------------------------+
*/

int i_APCI3120_ExttrigEnable(comedi_device * dev)
{


	devpriv->us_OutputRegister|=APCI3120_ENABLE_EXT_TRIGGER;
	outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);
	return 0;
}



/*
+----------------------------------------------------------------------------+
| Function name     : 	int i_APCI3120_ExttrigDisable(comedi_device * dev)   |
|                                        									 |
+----------------------------------------------------------------------------+
| Task              : 	Disables the external trigger					     |
|                     										                 |
+----------------------------------------------------------------------------+
| Input Parameters  : 	comedi_device * dev									 |
|                     														 |
|                                                 					         |
+----------------------------------------------------------------------------+
| Return Value      :    0          					                         |
|                    													     |
+----------------------------------------------------------------------------+
*/

int i_APCI3120_ExttrigDisable(comedi_device * dev)
{
	devpriv->us_OutputRegister&=~APCI3120_ENABLE_EXT_TRIGGER;
	outw(devpriv->us_OutputRegister,dev->iobase+APCI3120_WR_ADDRESS);
	return 0;
}






/*
+----------------------------------------------------------------------------+
|                    INTERRUPT FUNCTIONS		    		                 |
+----------------------------------------------------------------------------+
*/


/*
+----------------------------------------------------------------------------+
| Function name     : void v_APCI3120_Interrupt(int irq, void *d,            | 
|			  struct pt_regs *regs) 								 |
|                                        									 |
|                                            						         |
+----------------------------------------------------------------------------+
| Task              :Interrupt handler for APCI3120                        	 |
|			 When interrupt occurs this gets called.                 |
|			 First it finds which interrupt has been generated and   | 
|			 handles  corresponding interrupt                        |
|                     										                 |
+----------------------------------------------------------------------------+
| Input Parameters  : 	int irq 											 |
|                        void *d											 |
|                     	struct pt_regs *regs								 |
|                                                 					         |
+----------------------------------------------------------------------------+
| Return Value      : void         					                         |
|                    													     |
+----------------------------------------------------------------------------+
*/


 void v_APCI3120_Interrupt(int irq, void *d, struct pt_regs *regs) 
{	
	comedi_device *dev = d;
        USHORT int_daq;

	unsigned int int_amcc,ui_Check,i;
        USHORT us_TmpValue;
	BYTE  b_DummyRead;	
        
	comedi_subdevice *s = dev->subdevices + 0;	
        ui_Check=1;	


	int_daq=inw(dev->iobase+APCI3120_RD_STATUS) & 0xf000;		// get IRQ reasons
	int_amcc=inl(devpriv->i_IobaseAmcc+AMCC_OP_REG_INTCSR);	// get AMCC INT register