skxmac2.c

ARM8008光盘linux-kernel

	SK_U16	ZeroAddr[4] = {0x0000, 0x0000, 0x0000, 0x0000};

	XM_OUTHASH(IoC, Port, XM_HSM, &ZeroAddr);
}	/* SkXmClrHashAddr*/


/******************************************************************************
 *
 *	SkXmFlushTxFifo() - Flush the XMACs transmit FIFO
 *
 * Description:
 *	Flush the transmit FIFO of the XMAC specified by the index 'Port'
 *
 * Returns:
 *	nothing
 */
void SkXmFlushTxFifo(
SK_AC	*pAC,	/* adapter context */
SK_IOC	IoC,	/* IO context */
int		Port)	/* The XMAC to handle with belongs to this Port (MAC_1 + n) */
{
	SK_U32	MdReg;

	XM_IN32(IoC, Port, XM_MODE, &MdReg);
	MdReg |= XM_MD_FTF;
	XM_OUT32(IoC, Port, XM_MODE, MdReg);
}	/* SkXmFlushTxFifo */


/******************************************************************************
 *
 *	SkXmFlushRxFifo() - Flush the XMACs receive FIFO
 *
 * Description:
 *	Flush the receive FIFO of the XMAC specified by the index 'Port'
 *
 * Returns:
 *	nothing
 */
void SkXmFlushRxFifo(
SK_AC	*pAC,	/* adapter context */
SK_IOC	IoC,	/* IO context */
int		Port)	/* The XMAC to handle with belongs to this Port (MAC_1 + n) */
{
	SK_U32	MdReg;

	XM_IN32(IoC, Port, XM_MODE, &MdReg);
	MdReg |= XM_MD_FRF;
	XM_OUT32(IoC, Port, XM_MODE, MdReg);
}	/* SkXmFlushRxFifo*/


/******************************************************************************
 *
 *	SkXmSoftRst() - Do a XMAC software reset
 *
 * Description:
 *	The PHY registers should not be destroyed during this
 *	kind of software reset. Therefore the XMAC Software Reset
 *	(XM_GP_RES_MAC bit in XM_GP_PORT) must not be used!
 *
 *	The software reset is done by
 *		- disabling the Rx and Tx state maschine,
 *		- reseting the statistics module,
 *		- clear all other significant XMAC Mode,
 *		  Command, and Control Registers
 *		- clearing the Hash Register and the
 *		  Exact Match Address registers, and
 *		- flushing the XMAC's Rx and Tx FIFOs.
 *
 * Note:
 *	Another requirement when stopping the XMAC is to
 *	avoid sending corrupted frames on the network.
 *	Disabling the Tx state maschine will NOT interrupt
 *	the currently transmitted frame. But we must take care
 *	that the tx FIFO is cleared AFTER the current frame
 *	is complete sent to the network.
 *
 *	It takes about 12ns to send a frame with 1538 bytes.
 *	One PCI clock goes at least 15ns (66MHz). Therefore
 *	after reading XM_GP_PORT back, we are sure that the
 *	transmitter is disabled AND idle. And this means
 *	we may flush the transmit FIFO now.
 *
 * Returns:
 *	nothing
 */
void SkXmSoftRst(
SK_AC	*pAC,	/* adapter context */
SK_IOC	IoC,	/* IO context */
int		Port)	/* port to stop (MAC_1 + n) */
{
	SK_GEPORT	*pPrt;
	SK_U16		Word;

	pPrt = &pAC->GIni.GP[Port];

	/* disable the receiver and transmitter */
	XM_IN16(IoC, Port, XM_MMU_CMD, &Word);
	XM_OUT16(IoC, Port, XM_MMU_CMD, Word & ~(XM_MMU_ENA_RX|XM_MMU_ENA_TX));

	/* reset the statistics module */
	XM_OUT32(IoC, Port, XM_GP_PORT, XM_GP_RES_STAT);

	/*
	 * clear all other significant XMAC Mode,
	 * Command, and Control Registers
	 */
	XM_OUT16(IoC, Port, XM_IMSK, 0xffff);		/* disable all IRQs */
	XM_OUT32(IoC, Port, XM_MODE, 0x00000000);	/* clear Mode Reg */
	XM_OUT16(IoC, Port, XM_TX_CMD, 0x0000);		/* reset TX CMD Reg */
	XM_OUT16(IoC, Port, XM_RX_CMD, 0x0000);		/* reset RX CMD Reg */
	
	/* disable all PHY IRQs */
	switch (pAC->GIni.GP[Port].PhyType) {
	case SK_PHY_BCOM:
			PHY_WRITE(IoC, pPrt, Port, PHY_BCOM_INT_MASK, 0xffff);
			break;
		case SK_PHY_LONE:
			PHY_WRITE(IoC, pPrt, Port, PHY_LONE_INT_ENAB, 0x0);
			break;
		case SK_PHY_NAT:
			/* todo: National
			 PHY_WRITE(IoC, pPrt, Port, PHY_NAT_INT_MASK, 
				0xffff); */
			break;
	}

	/* clear the Hash Register */
	SkXmClrHashAddr(pAC, IoC, Port);

	/* clear the Exact Match Address registers */
	SkXmClrExactAddr(pAC, IoC, Port, 0, 15);
	SkXmClrSrcCheck(pAC, IoC, Port);

	/* flush the XMAC's Rx and Tx FIFOs */
	SkXmFlushTxFifo(pAC, IoC, Port);
	SkXmFlushRxFifo(pAC, IoC, Port);

	pAC->GIni.GP[Port].PState = SK_PRT_STOP;
}	/* SkXmSoftRst*/


/******************************************************************************
 *
 *	SkXmHardRst() - Do a XMAC hardware reset
 *
 * Description:
 *	The XMAC of the specified 'Port' and all connected devices
 *	(PHY and SERDES) will receive a reset signal on its *Reset
 *	pins.
 *	External PHYs must be reset be clearing a bit in the GPIO
 *	register (Timing requirements: Broadcom: 400ns, Level One:
 *	none, National: 80ns).
 *
 * ATTENTION:
 * 	It is absolutely neccessary to reset the SW_RST Bit first
 *	before calling this function.
 *
 * Returns:
 *	nothing
 */
void SkXmHardRst(
SK_AC	*pAC,	/* adapter context */
SK_IOC	IoC,	/* IO context */
int		Port)	/* port to stop (MAC_1 + n) */
{
	SK_U32	Reg;
	int		i;
	int		TOut;
	SK_U16	Word;

	for (i = 0; i < 4; i++) {
		/* TX_MFF_CTRL1 is a 32 bit register but only the lowest 16 */
		/* bit contains buttoms to press */
		SK_OUT16(IoC, MR_ADDR(Port, TX_MFF_CTRL1), (SK_U16)MFF_CLR_MAC_RST);

		TOut = 0;
		do {
			TOut ++;
			if (TOut > 10000) {
				/*
				 * Adapter seems to be in RESET state.
				 * Registers cannot be written.
				 */
				return;
			}

			SK_OUT16(IoC, MR_ADDR(Port, TX_MFF_CTRL1),
				(SK_U16) MFF_SET_MAC_RST);
			SK_IN16(IoC,MR_ADDR(Port,TX_MFF_CTRL1), &Word);
		} while ((Word & MFF_SET_MAC_RST) == 0);
	}

	/* For external PHYs there must be special handling */
	if (pAC->GIni.GP[Port].PhyType != SK_PHY_XMAC) {
		/* reset external PHY */
		SK_IN32(IoC, B2_GP_IO, &Reg);
		if (Port == 0) {
			Reg |= GP_DIR_0; /* set to output */
			Reg &= ~GP_IO_0;
		}
		else {
			Reg |= GP_DIR_2; /* set to output */
			Reg &= ~GP_IO_2;
		}
		SK_OUT32(IoC, B2_GP_IO, Reg);

		/* short delay */
		SK_IN32(IoC, B2_GP_IO, &Reg);
	}

	pAC->GIni.GP[Port].PState = SK_PRT_RESET;
}	/* SkXmHardRst */


/******************************************************************************
 *
 *	SkXmInitMac() - Initialize the XMAC II
 *
 * Description:
 *	Initialize all the XMAC of the specified port.
 *	The XMAC must be reset or stopped before calling this function.
 *
 * Note:
 *	The XMAC's Rx and Tx state machine is still disabled when returning.
 *
 * Returns:
 *	nothing
 */
void SkXmInitMac(
SK_AC	*pAC,		/* adapter context */
SK_IOC	IoC,		/* IO context */
int		Port)		/* Port Index (MAC_1 + n) */
{
	SK_GEPORT	*pPrt;
	SK_U32		Reg;
	int			i;
	SK_U16		SWord;
	SK_U16		PhyId;

	pPrt = &pAC->GIni.GP[Port];

	if (pPrt->PState == SK_PRT_STOP) {
		/* Port State: SK_PRT_STOP */
		/* Verify that the reset bit is cleared */
		SK_IN16(IoC, MR_ADDR(Port, TX_MFF_CTRL1), &SWord);
		if (SWord & (SK_U16)MFF_SET_MAC_RST) {
			/* PState does not match HW state */
			SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_HWI_E006, SKERR_HWI_E006MSG);
			/* Correct it. */
			pPrt->PState = SK_PRT_RESET;
		}
	}

	if (pPrt->PState == SK_PRT_RESET) {
		/*
		 * clear HW reset
		 * Note: The SW reset is self clearing, therefore there is
		 *	 nothing to do here.
		 */
		SK_OUT16(IoC, MR_ADDR(Port, TX_MFF_CTRL1), (SK_U16)MFF_CLR_MAC_RST);

		/* Ensure that XMAC reset release is done (errata from LReinbold?). */
		SK_IN16(IoC, MR_ADDR(Port, TX_MFF_CTRL1), &SWord);

		/* Clear PHY reset. */
		if (pAC->GIni.GP[Port].PhyType != SK_PHY_XMAC) {
			SK_IN32(IoC, B2_GP_IO, &Reg);
			if (Port == 0) {
				Reg |= GP_DIR_0; /* Set to output. */
				Reg |= GP_IO_0;
			}
			else {
				Reg |= GP_DIR_2; /* Set to output. */
				Reg |= GP_IO_2;
			}
			SK_OUT32(IoC, B2_GP_IO, Reg);

			/* Enable GMII interface. */
			XM_OUT16(IoC, Port, XM_HW_CFG, XM_HW_GMII_MD);

			PHY_READ(IoC, pPrt, Port, PHY_XMAC_ID1, &PhyId);
#ifdef xDEBUG
			if (SWord == 0xFFFF) {
				i = 1;
				do {
					PHY_READ(IoC, pPrt, Port, PHY_XMAC_ID1, &SWord);
					i++;
					/* Limit retries; else machine may hang. */
				} while (SWord == 0xFFFF && i < 500000);

				CMSMPrintString(
					pAC->pConfigTable,
					MSG_TYPE_RUNTIME_INFO,
					"ID1 is %x after %d reads.",
					(void *)SWord,
					(void *)i);

				/* Trigger PCI analyzer */
				/* SK_IN32(IoC, 0x012c, &Reg); */
			}
#endif	/* DEBUG */

			/*
			 * Optimize MDIO transfer by suppressing preamble.
			 * Must be done AFTER first access to BCOM chip.
			 */
			XM_IN16(IoC, Port, XM_MMU_CMD, &SWord);
			XM_OUT16(IoC, Port, XM_MMU_CMD, SWord | XM_MMU_NO_PRE);

			if (PhyId == 0x6044) {
				/* Workaround BCOM Errata for the C0 type. */
				/* Write magic patterns to reserved registers. */
				i = 0;
				while (BcomRegC0Hack[i].PhyReg != 0) {
					PHY_WRITE(IoC, pPrt, Port, BcomRegC0Hack[i].PhyReg,
						BcomRegC0Hack[i].PhyVal);
					i++;
				}
			}
			else if (PhyId == 0x6041) {
				/* Workaround BCOM Errata for the A1 type. */
				/* Write magic patterns to reserved registers. */
				i = 0;
				while (BcomRegA1Hack[i].PhyReg != 0) {
					PHY_WRITE(IoC, pPrt, Port, BcomRegA1Hack[i].PhyReg,
						BcomRegA1Hack[i].PhyVal);
					i++;
				}
			}

			/* Workaround BCOM Errata (#10523) for all BCom PHYs. */
			/* Disable Power Management after reset. */
			PHY_READ(IoC, pPrt, Port, PHY_BCOM_AUX_CTRL, &SWord);
#ifdef xDEBUG
			if (SWord == 0xFFFF) {
				i = 1;
				do {
					PHY_READ(IoC, pPrt, Port, PHY_BCOM_AUX_CTRL, &SWord);
					i++;
					/* Limit retries; else machine may hang. */
				} while (SWord == 0xFFFF && i < 500000);

				CMSMPrintString(
					pAC->pConfigTable,
					MSG_TYPE_RUNTIME_INFO,
					"AUX_CTRL is %x after %d reads.",
					(void *)SWord,
					(void *)i);

				/* Trigger PCI analyzer */
				/* SK_IN32(IoC, 0x012c, &Reg); */
			}
#endif	/* DEBUG */
			PHY_WRITE(IoC, pPrt, Port, PHY_BCOM_AUX_CTRL,
				SWord | PHY_B_AC_DIS_PM);

			/* PHY LED initialization is done in SkGeXmitLED(), not here. */
		}

		/* Dummy read the Interrupt source register */
		XM_IN16(IoC, Port, XM_ISRC, &SWord);
		
		/*
		 * The autonegotiation process starts immediately after
		 * clearing the reset. The autonegotiation process should be
		 * started by the SIRQ, therefore stop it here immediately.
		 */
		SkXmInitPhy(pAC, IoC, Port, SK_FALSE);

#if 0
		/* temp. code: enable signal detect */
		/* WARNING: do not override GMII setting above */
		XM_OUT16(pAC, Port, XM_HW_CFG, XM_HW_COM4SIG);
#endif
	}

	/*
	 * configure the XMACs Station Address
	 * B2_MAC_2 = xx xx xx xx xx x1 is programed to XMAC A
	 * B2_MAC_3 = xx xx xx xx xx x2 is programed to XMAC B
	 */
	for (i = 0; i < 3; i++) {
		/*
		 * The following 2 statements are together endianess
		 * independant. Remember this when changing.
		 */
		SK_IN16(IoC, (B2_MAC_2 + Port * 8 + i * 2), &SWord);
		XM_OUT16(IoC, Port, (XM_SA + i * 2), SWord);
	}

	/* Tx Inter Packet Gap (XM_TX_IPG):	use default */
	/* Tx High Water Mark (XM_TX_HI_WM):	use default */
	/* Tx Low Water Mark (XM_TX_LO_WM):	use default */
	/* Host Request Threshold (XM_HT_THR):	use default */
	/* Rx Request Threshold (XM_RX_THR):	use default */
	/* Rx Low Water Mark (XM_RX_LO_WM):	use default */

	/* configure Rx High Water Mark (XM_RX_HI_WM) */
	XM_OUT16(IoC, Port, XM_RX_HI_WM, 0x05aa);

	if (pAC->GIni.GIMacsFound > 1) {
		switch (pAC->GIni.GIPortUsage) {
		case SK_RED_LINK:
			/* Configure Tx Request Threshold for red. link */
			XM_OUT16(IoC, Port, XM_TX_THR, SK_XM_THR_REDL);
			break;
		case SK_MUL_LINK:
			/* Configure Tx Request Threshold for load bal. */
			XM_OUT16(IoC, Port, XM_TX_THR, SK_XM_THR_MULL);
			break;
		case SK_JUMBO_LINK:
			/* Configure Tx Request Threshold for jumbo frames */
			XM_OUT16(IoC, Port, XM_TX_THR, SK_XM_THR_JUMBO);
			break;
		default:
			SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_HWI_E014,
				SKERR_HWI_E014MSG);
			break;
		}
	}
	else {
		/* Configure Tx Request Threshold for single port */
		XM_OUT16(IoC, Port, XM_TX_THR, SK_XM_THR_SL);
	}

	/*
	 * setup register defaults for the Rx Command Register
	 *	- Enable Automatic Frame Padding on Tx side
	 */
	XM_OUT16(IoC, Port, XM_TX_CMD, XM_TX_AUTO_PAD);

	/*
	 * setup register defaults for the Rx Command Register,
	 * program value of PRxCmd
	 */
	XM_OUT16(IoC, Port, XM_RX_CMD, pPrt->PRxCmd);

	/*
	 * setup register defaults for the Mode Register
	 *	- Don't strip error frames to avoid Store & Forward