ulpi_test.c

Freescale MCF5445evb 参考测试代码

/*!
 * \file    ulpi_test.c
 * \brief   Test the ULPI interface on M54451EVB
 * \version $Revision: 1.1 $
 * \author  Michael Norman
 *
 * Test the SMSC USB3300 connectivity
 */
 
#include "common.h"
#include "m54451evb_tests.h"

                
/********************************************************************/
/*!
 * \brief   ULPI Test
 * \return  ULPI_PASS or ULPI_FAIL
 */
int
ulpi_test(void)
{
    int i, err_cnt = 0;
    uint8 data;

	/* Initialize the USB Clock from USB_CLKIN pin */
    MCF_CCM_MISCCR &= ~MCF_CCM_MISCCR_USBSRC;
	MCF_GPIO_PAR_DMA = MCF_GPIO_PAR_DMA
	    & MCF_GPIO_PAR_DMA_DREQ1_MASK
	    | MCF_GPIO_PAR_DMA_DREQ1_USB_CLKIN;
	
	/* Enable the required ULPI signals */
    MCF_GPIO_PAR_DMA = MCF_GPIO_PAR_DMA
        & MCF_GPIO_PAR_DMA_DACK1_MASK
        | MCF_GPIO_PAR_DMA_DACK1_ULPI_DIR;
    MCF_GPIO_PAR_USB = 0
        | MCF_GPIO_PAR_USB_VBUSEN_ULPI_NXT
        | MCF_GPIO_PAR_USB_VBUSOC_ULPI_STP;
    MCF_GPIO_PAR_FEC = MCF_GPIO_PAR_FEC 
        & MCF_GPIO_PAR_FEC_FEC0_MASK
        | MCF_GPIO_PAR_FEC_FEC0_RMII_ULPI;
    
	/* Enable Host mode */
	MCF_USB_USBMODE = 0
	    | MCF_USB_USBMODE_ES 
	    | MCF_USB_USBMODE_CM_HOST;

	/* Enable ULPI and apply power to the port */
	MCF_USB_PORTSC = 0
	    | MCF_USB_PORTSC_PTS_ULPI
	    | MCF_USB_PORTSC_PP;
	
    /* Wait a bit; If this isn't here the first read is 0x00 instead of 0x24 */
    for (i = 1000; i; i--)
        nop();
    
    for (i = 1000; i; i--)
    {
		/* Read the first register */	    
		MCF_USB_ULPI_VIEWPORT = 0
    		| MCF_USB_ULPI_VIEWPORT_ULPI_RUN
    		| MCF_USB_ULPI_VIEWPORT_ULPI_ADDR(0x0);
		while (MCF_USB_ULPI_VIEWPORT & MCF_USB_ULPI_VIEWPORT_ULPI_RUN);
	
		data = MCF_USB_ULPI_VIEWPORT>>8 &0xFF;
		if (data != 0x24)
			err_cnt++;
		
		/* Read the second register */	    
		MCF_USB_ULPI_VIEWPORT = 0
    		| MCF_USB_ULPI_VIEWPORT_ULPI_RUN
    		| MCF_USB_ULPI_VIEWPORT_ULPI_ADDR(0x1);
		while (MCF_USB_ULPI_VIEWPORT & MCF_USB_ULPI_VIEWPORT_ULPI_RUN);
	
		data = MCF_USB_ULPI_VIEWPORT>>8 &0xFF;
		if (data != 0x04)
			err_cnt++;
		
		/* Read the third register */	    
		MCF_USB_ULPI_VIEWPORT = 0
    		| MCF_USB_ULPI_VIEWPORT_ULPI_RUN
    		| MCF_USB_ULPI_VIEWPORT_ULPI_ADDR(0x2);
		while (MCF_USB_ULPI_VIEWPORT & MCF_USB_ULPI_VIEWPORT_ULPI_RUN);
	
		data = MCF_USB_ULPI_VIEWPORT>>8 &0xFF;
		if (data != 0x04)
			err_cnt++;
		
		/* Read the fourth register */	    
		MCF_USB_ULPI_VIEWPORT = 0
    		| MCF_USB_ULPI_VIEWPORT_ULPI_RUN
    		| MCF_USB_ULPI_VIEWPORT_ULPI_ADDR(0x3);
		while (MCF_USB_ULPI_VIEWPORT & MCF_USB_ULPI_VIEWPORT_ULPI_RUN);
	
		data = MCF_USB_ULPI_VIEWPORT>>8 &0xFF;
		if (data != 0x00)
			err_cnt++;
	}
	if (err_cnt)
	{
	    #ifdef DEBUG_PRINT
	    printf("ULPI: %d total errors\n",err_cnt);
	    #endif
	    return ULPI_FAIL;
	}

    return ULPI_PASS;
}
/********************************************************************/