ether_test.c

来自「eCos操作系统源码」· C语言 代码 · 共 1,146 行 · 第 1/3 页

	    status = ERROR;
	}

	if (pRfd->ok != 1) {
	    printf ("rx failed.  Status: 0x%04X.\n", pSCB->cmdStat.words.status);
	    status = ERROR;
	}
    }
#endif

    if (status == ERROR) {
	printf ("\nTransmit Stats:\n");
	printf ("---------------\n");
	printf ("Transmit OK = %d\n", pCmdBlock->transmit.ok);

	printf ("\nReceive Stats:\n");
	printf ("---------------\n\n");
	printf ("Receive OK = %d\n", pRfd->ok);
	printf ("CRC Error = %d\n", pRfd->crcErr);
	printf ("Alignment Error = %d\n", pRfd->alignErr);
	printf ("Resource Error = %d\n", pRfd->noRsrc);
	printf ("DMA Overrun Error = %d\n", pRfd->dmaOverrun);
	printf ("Frame Too Short Error = %d\n", pRfd->frameTooshort);
	printf ("Receive Collision Error = %d\n", pRfd->rxColl);
	return (ERROR);
    }

#if 0
    printf ("Packet Actual Size = %d\n", pRfd->actCount);
#endif

    if (checkPacket (pCmdBlock->transmit.txData, pRfd->rxData, ETHERMTU) == ERROR) {
	printf ("data verify error.\n");
	return (ERROR);
    }
    
    if (forever_flag == FALSE)
	printf ("data OK.\n");
#endif

    return (OK);
}


/*
 * "Poor Man's Malloc" - return a pointer to a block of memory at least
 * The block returned will have been zeroed.
 */
static char *malloc (int numBytes) /* number of bytes needed */
{
    volatile char *rtnPtr;	/* ptr to return to caller */
    long	new_mem_pool;	/* For figuring new pool base address */

    rtnPtr = mem_pool;	/* Return pointer to start of free pool */

    /* Now calculate new base of free memory pool (round to >= 16 bytes) */
    new_mem_pool = (UINT32) mem_pool;
    new_mem_pool = ((new_mem_pool + numBytes + 0x10) & (~((UINT32) 0x0f)));
    mem_pool = (volatile char *) new_mem_pool;

    memset(rtnPtr, 0, numBytes);

    return ((char *) rtnPtr);
}


/*
 * Write "value" to PORT register of PRO/100.
 */
static void portWrite (UINT32 value)
{
    *PORT_REG(adapter[0]) = value;
}


/******************************************************************************
*
* sendCommand - send a command to the 82557 via the on-chip SCB
*
* Send a command to the 82557.  On the 82557, the Channel Attention signal
* has been replaced by an on-chip SCB.  Accesses to the Command Word portion
* of the SCB automatically forces the '557 to look at the various data
* structures which make up its interface.
*/
static void sendCommand (UINT8 cuc, UINT8 ruc, UINT32 scb_general_ptr)
{
    register CMD_STAT_U temp_cmdStat;
    volatile union cmdBlock *pBlock = (union cmdBlock *)scb_general_ptr;
    volatile int loop_ctr;
	
    /* Mask adapter interrupts to prevent the interrupt handler from
       playing with the SCB */
    mask_557_ints();

    /* must wait for the Command Unit to become idle to prevent
       us from issueing a CU_START to an active Command Unit */
    for (loop_ctr = BUSY_WAIT_LIMIT; loop_ctr > 0; loop_ctr--) {
        if ((pSCB->cmdStat.words.status & SCB_S_CUMASK) == SCB_S_CUIDLE)
            break;
    }
    if (loop_ctr == 0) {
        printf("sendCommand: CU won't go idle, command ignored\n");
	unmask_557_ints();
        return;
    }

    /* when setting the command word, read the current word from
       the SCB and preserve the upper byte which contains the interrupt
       mask bit */
    temp_cmdStat.words.command = (pSCB->cmdStat.words.command & 0xff00);
    temp_cmdStat.words.status = 0;

    /* set up the Command and Receive unit commands */
    temp_cmdStat.bits.cuc = cuc & 0x07;
    temp_cmdStat.bits.ruc = ruc & 0x07;

    /* Clear flag */
    waitSem = 0;

    /* write the General Pointer portion of the SCB first */
    pSCB->scb_general_ptr = scb_general_ptr;

    /* write the Command Word of the SCB */
    pSCB->cmdStat.words.command = temp_cmdStat.words.command;

    /* only wait for command which will complete immediately */
    if ((scb_general_ptr != 0/* NULL*/) && (ruc != RU_START)) {
	/* wait for command acceptance and completion */
	for (loop_ctr = BUSY_WAIT_LIMIT; loop_ctr > 0; loop_ctr--) {
	    if ((pSCB->cmdStat.bits.cuc == 0) && (pBlock->nop.c == 1))
		break;
	}
	if (loop_ctr == 0) {
	    printf("sendCommand: Timeout on command complete\n");
	    printf("Cmd Complete bit = %02X\n", pBlock->nop.c);
	    printf("CU command       = 0x%02X\n", cuc);
	    printf("RU command       = 0x%02X\n", ruc);
	    printf("SCB Gen Ptr      = 0x%X\n", scb_general_ptr);
	    printf("scb status       = 0x%04X\n", pSCB->cmdStat.words.status);
	    printf("scb command      = 0x%04X\n", pSCB->cmdStat.words.command);
	}
    }

#if 0
    /* DEBUG */
    printf("scb command = 0x%04X\n", pSCB->cmdStat.words.command);
    printf("scb status  = 0x%04X\n", pSCB->cmdStat.words.status);
#endif

    unmask_557_ints();
    return;
}


/*
 * Do a port reset on 82557.
 */
static void resetChip (void)
{
    portWrite (PORT_RESET);	/* bits 4-31 not used for reset */

    /* wait 5 msec for device to stabilize */
    delay_ms(5);
}


/*
 * Setup contents of a packet.
 */
static void makePacket (UINT8 *pPacket, int length)
{
    int byteNum;	/* Current byte number */

    for (byteNum = 0; byteNum < length; byteNum++)
	*pPacket++ = byteNum + ' ';
}


/*
 * Verify contents of a received packet to what was transmitted.
 * Returns OK if they match, ERROR if not.
 */
static int checkPacket (UINT8 *pTxBuffer, UINT8 *pRxBuffer, int length)
{
    int byteNum;	/* Current byte number */

     for (byteNum = 0; byteNum < length; byteNum++) {
	 if (*pTxBuffer++ != *pRxBuffer++) {
	     printf("Error at byte 0x%x\n", byteNum);
	     printf("Expected 0x%02X, got 0x%02X\n", *(pTxBuffer - 1), *(pRxBuffer - 1));
	     return (ERROR);
	 }
     }
     return (OK);
}


/*
 * Interrupt handler for i82557.  It acknowledges the interrupt
 * by setting the ACK bits in the command word and issuing a
 * channel attention.  It then updates the global status variable
 * and gives the semaphore to wake up the main routine.
 */
int i557IntHandler (int arg)  /* should return int */
{
    register CMD_STAT_U temp_cmdStat;
    register int rxFlag = FALSE;

    temp_cmdStat.words.status = pSCB->cmdStat.words.status;

    /* check to see if it was the PRO/100 */
    if (temp_cmdStat.words.status & I557_INT) {
	/* Wait for command word to clear - indicates no pending commands */
	while (pSCB->cmdStat.words.command)
	    ;

	/* Update global status variable */
	i557Status = temp_cmdStat.words.status;

	/* If the interrupt was due to a received frame... */
	if (temp_cmdStat.bits.statack_fr)
	    rxFlag = TRUE;

	temp_cmdStat.words.status = temp_cmdStat.words.status & I557_INT;

	/* Acknowledge interrupt by setting ack bits */
	pSCB->cmdStat.words.status = temp_cmdStat.words.status;

	/* Wait for command word to clear - indicates IACK accepted */
	while (pSCB->cmdStat.words.command)
	    ;

	/* Update global status variable and unblock task */
	waitSem = 1;

	if (rxFlag == TRUE)
	    rxSem = 1;

	return(1);		/* serviced - return 1 */
    }
    return(0);			/* nothing serviced - return 0 */
}



/*
 * Take the semaphore and block until i557 interrupt or timeout.
 * Returns OK if an interrupt occured, ERROR if a timeout.
 */
static int waitForInt(void)
{
    int num_ms = 0; 

    while ((waitSem == 0) && (num_ms != 2000)) { /* wait max 2secs for the interrupt */
	delay_ms(1);
	num_ms++;
    }

    if (!waitSem) {
	printf("Wait error!\n"); 
	return (ERROR);
    } else
	return (OK);
}


static int waitForRxInt(void)
{
    int num_ms = 0; 

    while ((rxSem == 0) && (num_ms != 2000)) { /* wait max 2secs for the interrupt */
	delay_ms(1);
	num_ms++;
    }

    if (!rxSem) {
	printf("Rx Wait error!\n"); 
	return (ERROR);
    } else
	return (OK);
}


static UINT16 readMDI (int unit, UINT8	phyAdd, UINT8	regAdd)
{
    register MDI_CONTROL_U mdiCtrl;
    int num_ms = 0; 

    /* prepare for the MDI operation */
    mdiCtrl.bits.ready = MDI_NOT_READY;
    mdiCtrl.bits.intEnab = MDI_POLLED;	/* no interrupts */
    mdiCtrl.bits.op = MDI_READ_OP;
    mdiCtrl.bits.phyAdd = phyAdd & 0x1f;
    mdiCtrl.bits.regAdd = regAdd & 0x1f;

    /* start the operation */
    *MDI_CTL_REG(adapter[unit]) = mdiCtrl.word;

    /* delay a bit */
    delay_ms(1);

    /* poll for completion */
    mdiCtrl.word = *MDI_CTL_REG(adapter[unit]);

    while ((mdiCtrl.bits.ready == MDI_NOT_READY) && (num_ms != 2000)) { /* wait max 2secs */
	mdiCtrl.word = *MDI_CTL_REG(adapter[unit]);
	delay_ms(1);
	num_ms++;
    }	
	
    if (num_ms >= 2000)	{
	printf ("readMDI Timeout!\n");
	return (-1);
    } else 
	return ((UINT16)mdiCtrl.bits.data);
}


static void writeMDI (int unit, UINT8 phyAdd, UINT8 regAdd, UINT16 data)
{
    register MDI_CONTROL_U mdiCtrl;
    int num_ms = 0;

    /* prepare for the MDI operation */
    mdiCtrl.bits.ready = MDI_NOT_READY;
    mdiCtrl.bits.intEnab = MDI_POLLED;  /* no interrupts */
    mdiCtrl.bits.op = MDI_WRITE_OP;
    mdiCtrl.bits.phyAdd = phyAdd & 0x1f;
    mdiCtrl.bits.regAdd = regAdd & 0x1f;
    mdiCtrl.bits.data = data & 0xffff;

    /* start the operation */
    *MDI_CTL_REG(adapter[unit]) = mdiCtrl.word;

    /* delay a bit */
    delay_ms(1);

    /* poll for completion */
    mdiCtrl.word = *MDI_CTL_REG(adapter[unit]);

    while ((mdiCtrl.bits.ready == MDI_NOT_READY) && (num_ms != 2000)) {
	mdiCtrl.word = *MDI_CTL_REG(adapter[unit]);
	delay_ms(1);
	num_ms++;
    }
    if (num_ms >= 2000)
	printf ("writeMDI Timeout!\n");
 
    return;
}

static int get_ether_addr (int     unit,
			   UINT8   *buffer,
			   int     print_flag)  /* TRUE to print the information */
{
    UINT16 temp_node_addr[3] = {0,0,0};
    register int i;

    /* Get the adapter's node address */
    if (eeprom_read (adapter[unit],IA_OFFSET,temp_node_addr,3) != OK) {
	printf ("Error reading the IA address from Serial EEPROM.\n");
	return (ERROR);
    }
 
    buffer[0] = (UINT8)(temp_node_addr[0] & 0x00ff);
    buffer[1] = (UINT8)((temp_node_addr[0] & 0xff00)>>8);
    buffer[2] = (UINT8)(temp_node_addr[1] & 0x00ff);
    buffer[3] = (UINT8)((temp_node_addr[1] & 0xff00)>>8);
    buffer[4] = (UINT8)(temp_node_addr[2] & 0x00ff);
    buffer[5] = (UINT8)((temp_node_addr[2] & 0xff00)>>8);
 
    if (print_flag == TRUE) {
        printf("Ethernet Address = [ ");
        for (i=0; i<6; i++) {
            printf("0x%02X ", buffer[i]);
        }
        printf("]\n\n");
    }
    return (OK);
}