skxmac2.c

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/******************************************************************************
 *
 * Name:	skxmac2.c
 * Project:	GEnesis, PCI Gigabit Ethernet Adapter
 * Version:	$Revision: 1.61 $
 * Date:	$Date: 2001/02/09 15:40:59 $
 * Purpose:	Contains functions to initialize the XMAC II
 *
 ******************************************************************************/

/******************************************************************************
 *
 *	(C)Copyright 1998-2001 SysKonnect GmbH.
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 *	The information in this file is provided "AS IS" without warranty.
 *
 ******************************************************************************/

/******************************************************************************
 *
 * History:
 *
 *	$Log: skxmac2.c,v $
 *	Revision 1.61  2001/02/09 15:40:59  rassmann
 *	Editorial changes.
 *	
 *	Revision 1.60  2001/02/07 15:02:01  cgoos
 *	Added workaround for Fujitsu switch link down.
 *	
 *	Revision 1.59  2001/01/10 09:38:06  cgoos
 *	Fixed Broadcom C0/A1 Id check for workaround.
 *	
 *	Revision 1.58  2000/11/29 11:30:38  cgoos
 *	Changed DEBUG sections with NW output to xDEBUG
 *	
 *	Revision 1.57  2000/11/27 12:40:40  rassmann
 *	Suppressing preamble after first access to BCom, not before (#10556).
 *	
 *	Revision 1.56  2000/11/09 12:32:48  rassmann
 *	Renamed variables.
 *	
 *	Revision 1.55  2000/11/09 11:30:10  rassmann
 *	WA: Waiting after releasing reset until BCom chip is accessible.
 *	
 *	Revision 1.54  2000/10/02 14:10:27  rassmann
 *	Reading BCOM PHY after releasing reset until it returns a valid value.
 *	
 *	Revision 1.53  2000/07/27 12:22:11  gklug
 *	fix: possible endless loop in XmHardRst.
 *	
 *	Revision 1.52  2000/05/22 08:48:31  malthoff
 *	Fix: #10523 errata valid for all BCOM PHYs.
 *	
 *	Revision 1.51  2000/05/17 12:52:18  malthoff
 *	Fixes BCom link errata (#10523).
 *	
 *	Revision 1.50  1999/11/22 13:40:14  cgoos
 *	Changed license header to GPL.
 *	
 *	Revision 1.49  1999/11/22 08:12:13  malthoff
 *	Add workaround for power consumption feature of BCom C0 chip.
 *	
 *	Revision 1.48  1999/11/16 08:39:01  malthoff
 *	Fix: MDIO preamble suppression is port dependent.
 *	
 *	Revision 1.47  1999/08/27 08:55:35  malthoff
 *	1000BT: Optimizing MDIO transfer by oppressing MDIO preamble.
 *	
 *	Revision 1.46  1999/08/13 11:01:12  malthoff
 *	Fix for 1000BT: pFlowCtrlMode was not set correctly.
 *	
 *	Revision 1.45  1999/08/12 19:18:28  malthoff
 *	1000BT Fixes: Do not owerwrite XM_MMU_CMD.
 *	Do not execute BCOM A1 workaround for B1 chips.
 *	Fix pause frame setting.
 *	Always set PHY_B_AC_TX_TST in PHY_BCOM_AUX_CTRL.
 *	
 *	Revision 1.44  1999/08/03 15:23:48  cgoos
 *	Fixed setting of PHY interrupt mask in half duplex mode.
 *	
 *	Revision 1.43  1999/08/03 15:22:17  cgoos
 *	Added some debug output.
 *	Disabled XMac GP0 interrupt for external PHYs.
 *	
 *	Revision 1.42  1999/08/02 08:39:23  malthoff
 *	BCOM PHY: TX LED: To get the mono flop behaviour it is required
 *	to set the LED Traffic Mode bit in PHY_BCOM_P_EXT_CTRL.
 *	
 *	Revision 1.41  1999/07/30 06:54:31  malthoff
 *	Add temp. workarounds for the BCOM Phy revision A1.
 *	
 *	Revision 1.40  1999/06/01 07:43:26  cgoos
 *	Changed Link Mode Status in SkXmAutoNegDone... from FULL/HALF to
 *	AUTOFULL/AUTOHALF.
 *	
 *	Revision 1.39  1999/05/19 07:29:51  cgoos
 *	Changes for 1000Base-T.
 *	
 *	Revision 1.38  1999/04/08 14:35:10  malthoff
 *	Add code for enabling signal detect. Enabling signal detect is disabled.
 *	
 *	Revision 1.37  1999/03/12 13:42:54  malthoff
 *	Add: Jumbo Frame Support.
 *	Add: Receive modes SK_LENERR_OK_ON/OFF and
 *	SK_BIG_PK_OK_ON/OFF in SkXmSetRxCmd().
 *	
 *	Revision 1.36  1999/03/08 10:10:55  gklug
 *	fix: AutoSensing did switch to next mode even if LiPa indicated offline
 *
 *	Revision 1.35  1999/02/22 15:16:41  malthoff
 *	Remove some compiler warnings.
 *
 *	Revision 1.34  1999/01/22 09:19:59  gklug
 *	fix: Init DupMode and InitPauseMd are now called in RxTxEnable
 *
 *	Revision 1.33  1998/12/11 15:19:11  gklug
 *	chg: lipa autoneg stati
 *	chg: debug messages
 *	chg: do NOT use spurious XmIrq
 *
 *	Revision 1.32  1998/12/10 11:08:44  malthoff
 *	bug fix: pAC has been used for IOs in SkXmHardRst().
 *	SkXmInitPhy() is also called for the Diag in SkXmInitMac().
 *
 *	Revision 1.31  1998/12/10 10:39:11  gklug
 *	fix: do 4 RESETS of the XMAC at the beginning
 *	fix: dummy read interrupt source register BEFORE initializing the Phy
 *	add: debug messages
 *	fix: Linkpartners autoneg capability cannot be shown by TX_PAGE interrupt
 *
 *	Revision 1.30  1998/12/07 12:18:32  gklug
 *	add: refinement of autosense mode: take into account the autoneg cap of LiPa
 *
 *	Revision 1.29  1998/12/07 07:12:29  gklug
 *	fix: if page is received the link is  down.
 *
 *	Revision 1.28  1998/12/01 10:12:47  gklug
 *	chg: if spurious IRQ from XMAC encountered, save it
 *
 *	Revision 1.27  1998/11/26 07:33:38  gklug
 *	add: InitPhy call is now in XmInit function
 *
 *	Revision 1.26  1998/11/18 13:38:24  malthoff
 *	'Imsk' is also unused in SkXmAutoNegDone.
 *
 *	Revision 1.25  1998/11/18 13:28:01  malthoff
 *	Remove unused variable 'Reg' in SkXmAutoNegDone().
 *
 *	Revision 1.24  1998/11/18 13:18:45  gklug
 *	add: workaround for xmac errata #1
 *	add: detect Link Down also when Link partner requested config
 *	chg: XMIrq is only used when link is up
 *
 *	Revision 1.23  1998/11/04 07:07:04  cgoos
 *	Added function SkXmRxTxEnable.
 *
 *	Revision 1.22  1998/10/30 07:35:54  gklug
 *	fix: serve LinkDown interrupt when link is already down
 *
 *	Revision 1.21  1998/10/29 15:32:03  gklug
 *	fix: Link Down signaling
 *
 *	Revision 1.20  1998/10/29 11:17:27  gklug
 *	fix: AutoNegDone bug
 *
 *	Revision 1.19  1998/10/29 10:14:43  malthoff
 *	Add endainesss comment for reading/writing MAC addresses.
 *
 *	Revision 1.18  1998/10/28 07:48:55  cgoos
 *	Fix: ASS somtimes signaled although link is up.
 *
 *	Revision 1.17  1998/10/26 07:55:39  malthoff
 *	Fix in SkXmInitPauseMd(): Pause Mode
 *	was disabled and not enabled.
 *	Fix in SkXmAutoNegDone(): Checking Mode bits
 *	always failed, becaues of some missing braces.
 *
 *	Revision 1.16  1998/10/22 09:46:52  gklug
 *	fix SysKonnectFileId typo
 *
 *	Revision 1.15  1998/10/21 05:51:37  gklug
 *	add: para DoLoop to InitPhy function for loopback set-up
 *
 *	Revision 1.14  1998/10/16 10:59:23  malthoff
 *	Remove Lint warning for dummy reads.
 *
 *	Revision 1.13  1998/10/15 14:01:20  malthoff
 *	Fix: SkXmAutoNegDone() is (int) but does not return a value.
 *
 *	Revision 1.12  1998/10/14 14:45:04  malthoff
 *	Remove SKERR_SIRQ_E0xx and SKERR_SIRQ_E0xxMSG by
 *	SKERR_HWI_Exx and SKERR_HWI_E0xxMSG to be independant
 *	from the Sirq module.
 *
 *	Revision 1.11  1998/10/14 13:59:01  gklug
 *	add: InitPhy function
 *
 *	Revision 1.10  1998/10/14 11:20:57  malthoff
 *	Make SkXmAutoNegDone() public, because it's
 *	used in diagnostics, too.
 *	The Link Up event to the RLMT is issued in
 *	SkXmIrq(). SkXmIrq() is not available in
 *	diagnostics. Use PHY_READ when reading
 *	PHY registers.
 *
 *	Revision 1.9  1998/10/14 05:50:10  cgoos
 *	Added definition for Para.
 *
 *	Revision 1.8  1998/10/14 05:41:28  gklug
 *	add: Xmac IRQ
 *	add: auto negotiation done function
 *
 *	Revision 1.7  1998/10/09 06:55:20  malthoff
 *	The configuration of the XMACs Tx Request Threshold
 *	depends from the drivers port usage now. The port
 *	usage is configured in GIPortUsage.
 *
 *	Revision 1.6  1998/10/05 07:48:00  malthoff
 *	minor changes
 *
 *	Revision 1.5  1998/10/01 07:03:54  gklug
 *	add: dummy function for XMAC ISR
 *
 *	Revision 1.4  1998/09/30 12:37:44  malthoff
 *	Add SkXmSetRxCmd() and related code.
 *
 *	Revision 1.3  1998/09/28 13:26:40  malthoff
 *	Add SkXmInitMac(), SkXmInitDupMd(), and SkXmInitPauseMd()
 *
 *	Revision 1.2  1998/09/16 14:34:21  malthoff
 *	Add SkXmClrExactAddr(), SkXmClrSrcCheck(),
 *	SkXmClrHashAddr(), SkXmFlushTxFifo(),
 *	SkXmFlushRxFifo(), and SkXmHardRst().
 *	Finish Coding of SkXmSoftRst().
 *	The sources may be compiled now.
 *
 *	Revision 1.1  1998/09/04 10:05:56  malthoff
 *	Created.
 *
 *
 ******************************************************************************/

#include "h/skdrv1st.h"
#include "h/xmac_ii.h"
#include "h/skdrv2nd.h"

/* defines ********************************************************************/
/* typedefs *******************************************************************/
/* global variables ***********************************************************/

/* local variables ************************************************************/

static const char SysKonnectFileId[] =
	"@(#)$Id: skxmac2.c,v 1.61 2001/02/09 15:40:59 rassmann Exp $ (C) SK ";

/* BCOM PHY magic pattern list */
typedef struct s_PhyHack {
	int		PhyReg;		/* Phy register */
	SK_U16	PhyVal;		/* Value to write */
} BCOM_HACK;

BCOM_HACK BcomRegA1Hack[] = {
 { 0x18, 0x0c20 }, { 0x17, 0x0012 }, { 0x15, 0x1104 }, { 0x17, 0x0013 },
 { 0x15, 0x0404 }, { 0x17, 0x8006 }, { 0x15, 0x0132 }, { 0x17, 0x8006 },
 { 0x15, 0x0232 }, { 0x17, 0x800D }, { 0x15, 0x000F }, { 0x18, 0x0420 },
 { 0, 0 }
};
BCOM_HACK BcomRegC0Hack[] = {
 { 0x18, 0x0c20 }, { 0x17, 0x0012 }, { 0x15, 0x1204 }, { 0x17, 0x0013 },
 { 0x15, 0x0A04 }, { 0x18, 0x0420 },
 { 0, 0 }
};

/* function prototypes ********************************************************/
static void	SkXmInitPhyXmac(SK_AC*, SK_IOC, int, SK_BOOL);
static void	SkXmInitPhyBcom(SK_AC*, SK_IOC, int, SK_BOOL);
static void	SkXmInitPhyLone(SK_AC*, SK_IOC, int, SK_BOOL);
static void	SkXmInitPhyNat (SK_AC*, SK_IOC, int, SK_BOOL);
static int	SkXmAutoNegDoneXmac(SK_AC*, SK_IOC, int);
static int	SkXmAutoNegDoneBcom(SK_AC*, SK_IOC, int);
static int	SkXmAutoNegDoneLone(SK_AC*, SK_IOC, int);
static int	SkXmAutoNegDoneNat (SK_AC*, SK_IOC, int);

/******************************************************************************
 *
 *	SkXmSetRxCmd() - Modify the value of the XMACs Rx Command Register
 *
 * Description:
 *	The features
 *	 o FCS stripping,			SK_STRIP_FCS_ON/OFF
 *	 o pad byte stripping,			SK_STRIP_PAD_ON/OFF
 *	 o don't set XMR_FS_ERR in frame	SK_LENERR_OK_ON/OFF
 *	   status for inrange length error
 *	   frames, and
 *	 o don't set XMR_FS_ERR in frame	SK_BIG_PK_OK_ON/OFF
 *	   status for frames > 1514 bytes
 *
 *	for incomming packets may be enabled/disabled by this function.
 *	Additional modes may be added later.
 *	Multiple modes can be enabled/disabled at the same time.
 *	The new configuration is stored into the HWAC port configuration
 *	and is written to the Receive Command register immediatlely.
 *	The new configuration is saved over any SkGePortStop() and
 *	SkGeInitPort() calls. The configured value will be overwritten
 *	when SkGeInit(Level 0) is executed.
 *
 * Returns:
 *	nothing
 */
void SkXmSetRxCmd(
SK_AC	*pAC,		/* adapter context */
SK_IOC	IoC,		/* IO context */
int		Port,		/* The XMAC to handle with belongs to this Port */
int		Mode)		/* Mode is SK_STRIP_FCS_ON/OFF, SK_STRIP_PAD_ON/OFF,
					   SK_LENERR_OK_ON/OFF, or SK_BIG_PK_OK_ON/OFF */
{
	SK_GEPORT	*pPrt;
	SK_U16		OldRxMode;

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

	switch(Mode & (SK_STRIP_FCS_ON | SK_STRIP_FCS_OFF)) {
	case SK_STRIP_FCS_ON:
		pPrt->PRxCmd |= XM_RX_STRIP_FCS;
		break;
	case SK_STRIP_FCS_OFF:
		pPrt->PRxCmd &= ~XM_RX_STRIP_FCS;
		break;
	}

	switch(Mode & (SK_STRIP_PAD_ON | SK_STRIP_PAD_OFF)) {
	case SK_STRIP_PAD_ON:
		pPrt->PRxCmd |= XM_RX_STRIP_PAD;
		break;
	case SK_STRIP_PAD_OFF:
		pPrt->PRxCmd &= ~XM_RX_STRIP_PAD;
		break;
	}

	switch(Mode & (SK_LENERR_OK_ON | SK_LENERR_OK_OFF)) {
	case SK_LENERR_OK_ON:
		pPrt->PRxCmd |= XM_RX_LENERR_OK;
		break;
	case SK_LENERR_OK_OFF:
		pPrt->PRxCmd &= ~XM_RX_LENERR_OK;
		break;
	}

	switch(Mode & (SK_BIG_PK_OK_ON | SK_BIG_PK_OK_OFF)) {
	case SK_BIG_PK_OK_ON:
		pPrt->PRxCmd |= XM_RX_BIG_PK_OK;
		break;
	case SK_BIG_PK_OK_OFF:
		pPrt->PRxCmd &= ~XM_RX_BIG_PK_OK;
		break;
	}

	/* Write the new mode to the receive command register if required */
	if (OldRxMode != pPrt->PRxCmd) {
		XM_OUT16(IoC, Port, XM_RX_CMD, pPrt->PRxCmd);
	}
}	/* SkXmSetRxCmd*/


/******************************************************************************
 *
 *	SkXmClrExactAddr() - Clear Exact Match Address Registers
 *
 * Description:
 *	All Exact Match Address registers of the XMAC 'Port' will be
 *	cleared starting with 'StartNum' up to (and including) the
 *	Exact Match address number of 'StopNum'.
 *
 * Returns:
 *	nothing
 */
void SkXmClrExactAddr(
SK_AC	*pAC,		/* adapter context */
SK_IOC	IoC,		/* IO context */
int		Port,		/* The XMAC to handle with belongs to this Port */
int		StartNum,	/* Begin with this Address Register Index (0..15) */
int		StopNum)	/* Stop after finished with this Register Idx (0..15) */
{
	int		i;
	SK_U16	ZeroAddr[3] = {0x0000, 0x0000, 0x0000};

	if ((unsigned)StartNum > 15 || (unsigned)StopNum > 15 ||
		StartNum > StopNum) {

		SK_ERR_LOG(pAC, SK_ERRCL_SW, SKERR_HWI_E001, SKERR_HWI_E001MSG);
		return;
	}

	for (i = StartNum; i <= StopNum; i++) {
		XM_OUTADDR(IoC, Port, XM_EXM(i), &ZeroAddr[0]);
	}
}	/* SkXmClrExactAddr */


/******************************************************************************
 *
 *	SkXmClrSrcCheck() - Clear Source Check Address Register
 *
 * Description:
 *	The Source Check Address Register of the XMAC 'Port' number
 *	will be cleared.
 *
 * Returns:
 *	nothing
 */
static void SkXmClrSrcCheck(
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_U16	ZeroAddr[3] = {0x0000, 0x0000, 0x0000};

	XM_OUTHASH(IoC, Port, XM_SRC_CHK, &ZeroAddr);
}	/* SkXmClrSrcCheck */


/******************************************************************************
 *
 *	SkXmClrHashAddr() - Clear Hash Address Registers
 *
 * Description:
 *	The Hash Address Register of the XMAC 'Port' will be cleared.
 *
 * Returns:
 *	nothing
 */
static void SkXmClrHashAddr(
SK_AC	*pAC,	/* adapter context */
SK_IOC	IoC,	/* IO context */
int		Port)	/* The XMAC to handle with belongs to this Port (MAC_1 + n) */
{