smc_rv.c

U-boot源码 ARM7启动代码

	unsigned int bit, int val)
{
	word regval;

	SMC_SELECT_BANK( bank );

	regval = SMC_inw( reg );
	if (val)
		regval |= bit;
	else
		regval &= ~bit;

	SMC_outw( regval, 0 );
	return(regval);
}


/*------------------------------------------------------------
 . Retrieve a bit in the LAN91C111 register set
 .-------------------------------------------------------------*/
static int smc_get_regbit(int bank, int ioaddr, int reg, unsigned int bit)
{
	SMC_SELECT_BANK( bank );
	if ( SMC_inw( reg ) & bit)
		return(1);
	else
		return(0);
}


/*------------------------------------------------------------
 . Modify a LAN91C111 register (word access only)
 .-------------------------------------------------------------*/
static void smc_modify_reg(int bank, int ioaddr, int reg, word val)
{
	SMC_SELECT_BANK( bank );
	SMC_outw( val, reg );
}


/*------------------------------------------------------------
 . Retrieve a LAN91C111 register (word access only)
 .-------------------------------------------------------------*/
static int smc_get_reg(int bank, int ioaddr, int reg)
{
	SMC_SELECT_BANK( bank );
	return(SMC_inw( reg ));
}

#endif /* 0 */

/*---PHY CONTROL AND CONFIGURATION----------------------------------------- */

#if (SMC_DEBUG > 2 )

/*------------------------------------------------------------
 . Debugging function for viewing MII Management serial bitstream
 .-------------------------------------------------------------*/
static void smc_dump_mii_stream (byte * bits, int size)
{
	int i;

	printf ("BIT#:");
	for (i = 0; i < size; ++i) {
		printf ("%d", i % 10);
	}

	printf ("\nMDOE:");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDOE)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\nMDO :");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDO)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\nMDI :");
	for (i = 0; i < size; ++i) {
		if (bits[i] & MII_MDI)
			printf ("1");
		else
			printf ("0");
	}

	printf ("\n");
}
#endif

/*------------------------------------------------------------
 . Reads a register from the MII Management serial interface
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static word smc_read_phy_register (byte phyreg)
{
	int oldBank;
	int i;
	byte mask;
	word mii_reg;
	byte bits[64];
	int clk_idx = 0;
	int input_idx;
	word phydata;
	byte phyaddr = SMC_PHY_ADDR;

	/* 32 consecutive ones on MDO to establish sync */
	for (i = 0; i < 32; ++i)
		bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Start code <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Read command <10> */
	bits[clk_idx++] = MII_MDOE | MII_MDO;
	bits[clk_idx++] = MII_MDOE;

	/* Output the PHY address, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyaddr & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Output the phy register number, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyreg & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Tristate and turnaround (2 bit times) */
	bits[clk_idx++] = 0;
	/*bits[clk_idx++] = 0; */

	/* Input starts at this bit time */
	input_idx = clk_idx;

	/* Will input 16 bits */
	for (i = 0; i < 16; ++i)
		bits[clk_idx++] = 0;

	/* Final clock bit */
	bits[clk_idx++] = 0;

	/* Save the current bank */
	oldBank = SMC_inw (BANK_SELECT);

	/* Select bank 3 */
	SMC_SELECT_BANK (3);

	/* Get the current MII register value */
	mii_reg = SMC_inw (MII_REG);

	/* Turn off all MII Interface bits */
	mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);

	/* Clock all 64 cycles */
	for (i = 0; i < sizeof bits; ++i) {
		/* Clock Low - output data */
		SMC_outw (mii_reg | bits[i], MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);


		/* Clock Hi - input data */
		SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);
		bits[i] |= SMC_inw (MII_REG) & MII_MDI;
	}

	/* Return to idle state */
	/* Set clock to low, data to low, and output tristated */
	SMC_outw (mii_reg, MII_REG);
	udelay (SMC_PHY_CLOCK_DELAY);

	/* Restore original bank select */
	SMC_SELECT_BANK (oldBank);

	/* Recover input data */
	phydata = 0;
	for (i = 0; i < 16; ++i) {
		phydata <<= 1;

		if (bits[input_idx++] & MII_MDI)
			phydata |= 0x0001;
	}

#if (SMC_DEBUG > 2 )
	printf ("smc_read_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
		phyaddr, phyreg, phydata);
	smc_dump_mii_stream (bits, sizeof bits);
#endif

	return (phydata);
}


/*------------------------------------------------------------
 . Writes a register to the MII Management serial interface
 .-------------------------------------------------------------*/
static void smc_write_phy_register (byte phyreg, word phydata)
{
	int oldBank;
	int i;
	word mask;
	word mii_reg;
	byte bits[65];
	int clk_idx = 0;
	byte phyaddr = SMC_PHY_ADDR;

	/* 32 consecutive ones on MDO to establish sync */
	for (i = 0; i < 32; ++i)
		bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Start code <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Write command <01> */
	bits[clk_idx++] = MII_MDOE;
	bits[clk_idx++] = MII_MDOE | MII_MDO;

	/* Output the PHY address, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyaddr & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Output the phy register number, msb first */
	mask = (byte) 0x10;
	for (i = 0; i < 5; ++i) {
		if (phyreg & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Tristate and turnaround (2 bit times) */
	bits[clk_idx++] = 0;
	bits[clk_idx++] = 0;

	/* Write out 16 bits of data, msb first */
	mask = 0x8000;
	for (i = 0; i < 16; ++i) {
		if (phydata & mask)
			bits[clk_idx++] = MII_MDOE | MII_MDO;
		else
			bits[clk_idx++] = MII_MDOE;

		/* Shift to next lowest bit */
		mask >>= 1;
	}

	/* Final clock bit (tristate) */
	bits[clk_idx++] = 0;

	/* Save the current bank */
	oldBank = SMC_inw (BANK_SELECT);

	/* Select bank 3 */
	SMC_SELECT_BANK (3);

	/* Get the current MII register value */
	mii_reg = SMC_inw (MII_REG);

	/* Turn off all MII Interface bits */
	mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);

	/* Clock all cycles */
	for (i = 0; i < sizeof bits; ++i) {
		/* Clock Low - output data */
		SMC_outw (mii_reg | bits[i], MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);


		/* Clock Hi - input data */
		SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
		udelay (SMC_PHY_CLOCK_DELAY);
		bits[i] |= SMC_inw (MII_REG) & MII_MDI;
	}

	/* Return to idle state */
	/* Set clock to low, data to low, and output tristated */
	SMC_outw (mii_reg, MII_REG);
	udelay (SMC_PHY_CLOCK_DELAY);

	/* Restore original bank select */
	SMC_SELECT_BANK (oldBank);

#if (SMC_DEBUG > 2 )
	printf ("smc_write_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
		phyaddr, phyreg, phydata);
	smc_dump_mii_stream (bits, sizeof bits);
#endif
}
#endif /* !CONFIG_SMC91111_EXT_PHY */


/*------------------------------------------------------------
 . Waits the specified number of milliseconds - kernel friendly
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static void smc_wait_ms(unsigned int ms)
{
	udelay(ms*1000);
}
#endif /* !CONFIG_SMC91111_EXT_PHY */


/*------------------------------------------------------------
 . Configures the specified PHY using Autonegotiation. Calls
 . smc_phy_fixed() if the user has requested a certain config.
 .-------------------------------------------------------------*/
#ifndef CONFIG_SMC91111_EXT_PHY
static void smc_phy_configure ()
{
	int timeout;
	byte phyaddr;
	word my_phy_caps;	/* My PHY capabilities */
	word my_ad_caps;	/* My Advertised capabilities */
	word status = 0;	/*;my status = 0 */
	int failed = 0;

	PRINTK3 ("%s: smc_program_phy()\n", SMC_DEV_NAME);


	/* Get the detected phy address */
	phyaddr = SMC_PHY_ADDR;

	/* Reset the PHY, setting all other bits to zero */
	smc_write_phy_register (PHY_CNTL_REG, PHY_CNTL_RST);

	/* Wait for the reset to complete, or time out */
	timeout = 6;		/* Wait up to 3 seconds */
	while (timeout--) {
		if (!(smc_read_phy_register (PHY_CNTL_REG)
		      & PHY_CNTL_RST)) {
			/* reset complete */
			break;
		}

		smc_wait_ms (500);	/* wait 500 millisecs */
	}

	if (timeout < 1) {
		printf ("%s:PHY reset timed out\n", SMC_DEV_NAME);
		goto smc_phy_configure_exit;
	}

	/* Read PHY Register 18, Status Output */
	/* lp->lastPhy18 = smc_read_phy_register(PHY_INT_REG); */

	/* Enable PHY Interrupts (for register 18) */
	/* Interrupts listed here are disabled */
	smc_write_phy_register (PHY_MASK_REG, 0xffff);

	/* Configure the Receive/Phy Control register */
	SMC_SELECT_BANK (0);
	SMC_outw (RPC_DEFAULT, RPC_REG);

	/* Copy our capabilities from PHY_STAT_REG to PHY_AD_REG */
	my_phy_caps = smc_read_phy_register (PHY_STAT_REG);
	my_ad_caps = PHY_AD_CSMA;	/* I am CSMA capable */

	if (my_phy_caps & PHY_STAT_CAP_T4)
		my_ad_caps |= PHY_AD_T4;

	if (my_phy_caps & PHY_STAT_CAP_TXF)
		my_ad_caps |= PHY_AD_TX_FDX;

	if (my_phy_caps & PHY_STAT_CAP_TXH)
		my_ad_caps |= PHY_AD_TX_HDX;

	if (my_phy_caps & PHY_STAT_CAP_TF)
		my_ad_caps |= PHY_AD_10_FDX;

	if (my_phy_caps & PHY_STAT_CAP_TH)
		my_ad_caps |= PHY_AD_10_HDX;

	/* Update our Auto-Neg Advertisement Register */
	smc_write_phy_register (PHY_AD_REG, my_ad_caps);

	/* Read the register back.  Without this, it appears that when */
	/* auto-negotiation is restarted, sometimes it isn't ready and */
	/* the link does not come up. */
	smc_read_phy_register(PHY_AD_REG);

	PRINTK2 ("%s: phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
	PRINTK2 ("%s: phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);

	/* Restart auto-negotiation process in order to advertise my caps */
	smc_write_phy_register (PHY_CNTL_REG,
				PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST);

	/* Wait for the auto-negotiation to complete.  This may take from */
	/* 2 to 3 seconds. */
	/* Wait for the reset to complete, or time out */
	timeout = CONFIG_SMC_AUTONEG_TIMEOUT * 2;
	while (timeout--) {

		status = smc_read_phy_register (PHY_STAT_REG);
		if (status & PHY_STAT_ANEG_ACK) {
			/* auto-negotiate complete */
			break;
		}

		smc_wait_ms (500);	/* wait 500 millisecs */

		/* Restart auto-negotiation if remote fault */
		if (status & PHY_STAT_REM_FLT) {
			printf ("%s: PHY remote fault detected\n",
				SMC_DEV_NAME);

			/* Restart auto-negotiation */
			printf ("%s: PHY restarting auto-negotiation\n",
				SMC_DEV_NAME);
			smc_write_phy_register (PHY_CNTL_REG,
						PHY_CNTL_ANEG_EN |
						PHY_CNTL_ANEG_RST |
						PHY_CNTL_SPEED |
						PHY_CNTL_DPLX);
		}
	}

	if (timeout < 1) {
		printf ("%s: PHY auto-negotiate timed out\n", SMC_DEV_NAME);
		failed = 1;
	}

	/* Fail if we detected an auto-negotiate remote fault */
	if (status & PHY_STAT_REM_FLT) {
		printf ("%s: PHY remote fault detected\n", SMC_DEV_NAME);
		failed = 1;
	}

	/* Re-Configure the Receive/Phy Control register */
	SMC_outw (RPC_DEFAULT, RPC_REG);

smc_phy_configure_exit:	;

}
#endif /* !CONFIG_SMC91111_EXT_PHY */


#if SMC_DEBUG > 2
static void print_packet( byte * buf, int length )
{
	int i;
	int remainder;
	int lines;

	printf("Packet of length %d \n", length );

#if SMC_DEBUG > 3
	lines = length / 16;
	remainder = length % 16;

	for ( i = 0; i < lines ; i ++ ) {
		int cur;

		for ( cur = 0; cur < 8; cur ++ ) {
			byte a, b;

			a = *(buf ++ );
			b = *(buf ++ );
			printf("%02x%02x ", a, b );
		}
		printf("\n");
	}
	for ( i = 0; i < remainder/2 ; i++ ) {
		byte a, b;

		a = *(buf ++ );
		b = *(buf ++ );
		printf("%02x%02x ", a, b );
	}
	printf("\n");
#endif
}
#endif

int smc_get_ethaddr (bd_t * bd)