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C++ (Cpp) balong_i2c_all_mask Example

Introduction

The c++ (cpp) balong_i2c_all_mask example is extracted from the most popular open source projects, you can refer to the following example for usage.

Programming language: C++ (Cpp)

Method/Function: balong_i2c_all_mask

Example#1
File: i2c_balong.c Project: debbiche/android_kernel_huawei_p8 

static s32 balong_i2c_status_check(struct balong_i2c_ctrl *i2c_master)
{
	u32 reg_value;
	s32 timeout=I2C_STATUS_TIMEOUT;

	/*Does bus  transfer over */
	do
	{
		reg_value= readl(i2c_master->regs+HI_I2C_SR_OFFSET);

		/*判断是否收到ACK中断*/
		if(reg_value&HI_I2C_SR_ACKERR){
			i2c_print_error("i2c hasn't receive ack!\n");
		}

		/*判断是否有总线仲裁失败的情况*/
		if(reg_value&HI_I2C_SR_ABITR){
			i2c_print_error("i2c has abitrage ERROR!\n");
		}

	}while((!(reg_value &HI_I2C_SR_INTDONE)) && (--timeout > 0));

	if(0 == timeout)
	{
		i2c_print_error("I2C: Timeout! \n");
		return I2C_ERROR;
	}
	balong_i2c_all_mask(i2c_master);
	return OK;
}

Example#2
File: i2c_balong.c Project: debbiche/android_kernel_huawei_p8 

static void balong_i2c_message_start(struct balong_i2c_ctrl *i2c_master,u8 device_id)
{
	/*lint -save -e958*/
	u32 addr=0;
	u32 tmp=0;
	/*lint -restore*/

	if(NULL == i2c_master){
		i2c_print_error("i2c master is null\n");
		return ;
	}

	/*set high high level cycle*/
	balong_i2c_scl_high(i2c_master);

	/* set high low level cycle */
	balong_i2c_scl_low(i2c_master);

	/* clear all interrupt  */
	balong_i2c_all_mask(i2c_master);

	/* set i2c ctrl*/
	balong_i2c_enable(i2c_master);

	/* set the first message ,and put it in the TXR register*/
	addr=(device_id&SLAVE_ID_MASK)<<1;

	writel(addr,i2c_master->regs+HI_I2C_TXR_OFFSET);

	/* send start command and write command */
	tmp=HI_I2C_COM_START|HI_I2C_COM_WRITE;
	writel(tmp,i2c_master->regs+HI_I2C_COM_OFFSET);
	return ;
}

Example#3
File: i2c.c Project: samm-git/e3372h-vendor-src 

/*****************************************************************************
 fun_name	: balong_i2c_status_check
 function		: get i2c bus transfer status
 para_in		: no
 
 para_out		: no
 back_val    	: 
 			  0:success
 			-1:fail

 modify log 	:
  	  date	: 2013-3-14
Modification  	: create file
*****************************************************************************/
s32 balong_i2c_status_check(struct balong_i2c_ctrl *i2c_master)
{
	u32 reg_value;
	s32 timeout=I2C_STATUS_TIMEOUT;

	
	/*Does bus  transfer over */
	do
	{
		reg_value= readl(i2c_master->regs+HI_I2C_SR_OFFSET);

		/*ÅжÏÊÇ·ñÊÕµ½ACKÖжÏ*/
		if(reg_value&HI_I2C_SR_ACKERR){
				cprintf("i2c hasn't receive ack!status_register is:0x%x\n",reg_value);
		}

		/*ÅжÏÊÇ·ñÓÐ×ÜÏßÖÙ²Ãʧ°ÜµÄÇé¿ö*/
		if(reg_value&HI_I2C_SR_ABITR){
				cprintf("i2c has abitrage ERROR!status_register is:0x%x\n",reg_value);
				return I2C_ERROR;
		}
		
	}while((!(reg_value &HI_I2C_SR_INTDONE)) && (--timeout > 0));

   	 if(0 == timeout)
   	 {
    		cprintf("I2C: Timeout! \n");
       		 return I2C_ERROR;
    	}
	balong_i2c_all_mask(i2c_master);
    	return OK;
}

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