if_ene.c

IXP425的BSP代码

/* if_ene.c - Novell/Eagle NE2000 network interface driver */

/* Copyright 1994-1998 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01l,25feb99,jmb  fix type of whirlGig arg (for SH7729)
01j,15jul97,spm  removed driver initialization from ioctl support (SPR #8831)
01i,15may97,spm  reverted to bcopy routines for mbufs in BSD 4.4
01h,07apr97,spm  code cleanup, corrected statistics, and upgraded to BSD 4.4
01g,11sep98,jmb  Manta mods:  Use pciIntConnect, only 2 slots on Manta,
                 add whirlyGig.
01f,25oct96,dat  SPR 7352, did not support IRQ 12. Now supports all IRQs.
		 fixed some compiler warnings.
01e,14jun95,hdn  removed function declarations defined in sysLib.h.
01d,01feb95,jdi  doc cleanup.
01c,12nov94,tmk  removed some IMPORTed function decs and included unixLib.h
01a,01jan94,bcs  written.
*/

/*
DESCRIPTION
This module implements the Novell/Eagle NE2000 network interface driver.
There is one user-callable routine, eneattach().


BOARD LAYOUT
The diagram below shows the relevant jumpers for VxWorks configuration.
Other compatible boards will be jumpered differently; many are jumperless.

.bS
        _________________________________________________________
        |                                                       |
        |                                                       |
        |                                           WWWWWWWW    |
        |                       WWWW  WWW           87654321    ||
        |                       1111   11         1 ........    ||
        |                       5432  901         2 ........    ||
        |                       ....  ...         3 ........    ||
        |                       ....  ...                       ||
        |               W                                       |
        |               1                                       |
        |               6                                       |___
        |               .                                       |___|
        |               .                                       |
        |________               ___                         ____|
                |               | |                         |
                |_______________| |_________________________|

    W1..W8  1-2 position selects AUI ("DIX") connector
	    2-3 position selects BNC (10BASE2) connector
    W9..W11 YYN  I/O address 300h, no boot ROM
	    NYN  I/O address 320h, no boot ROM
	    YNN  I/O address 340h, no boot ROM
	    NNN  I/O address 360h, no boot ROM
	    YYY  I/O address 300h, boot ROM at paragraph 0c800h
	    NYY  I/O address 320h, boot ROM at paragraph 0cc00h
	    YNY  I/O address 340h, boot ROM at paragraph 0d000h
	    NNY  I/O address 360h, boot ROM at ??? (invalid configuration?)
    W12     Y    IRQ 2 (or 9 if you prefer)
    W13     Y    IRQ 3
    W14     Y    IRQ 4
    W15     Y    IRQ 5 (note that only one of W12..W15 may be installed)
    W16     Y    normal ISA bus timing
	    N    timing for COMPAQ 286 portable, PS/2 Model 30-286, C&T chipset
.bE


EXTERNAL INTERFACE
There are two user-callable routines:
.iP eneattach() 14
publishes the `ene' interface and initializes the driver and device.
.iP eneShow()
displays statistics that are collected in the interrupt handler.
.LP
See the manual entries for these routines for more detail.


SYSTEM RESOURCE USAGE
    - one interrupt vector
    - 16 bytes in the uninitialized data section (bss)
    - 1752 bytes (plus overhead) of malloc'ed memory per unit attached


CAVEAT
This driver does not enable the twisted-pair connector on the Taiwanese
ETHER-16 compatible board.

*/

/***** includes *****/

#include "vxWorks.h"
#include "net/mbuf.h"
#include "net/unixLib.h"
#include "net/protosw.h"
#include "ioctl.h"
#include "socket.h"
#include "errnoLib.h"
#include "net/uio.h"
#include "net/if.h"
#include "net/route.h"
#include "netinet/in.h"
#include "netinet/in_systm.h"
#include "netinet/ip.h"
#include "netinet/ip_var.h"
#include "netinet/in_var.h"
#include "netinet/if_ether.h"
#include "etherLib.h"
#include "vme.h"
#include "iv.h"
#include "iosLib.h"
#include "ioLib.h"
#include "memLib.h"
#include "net/systm.h"
#include "net/if_subr.h"
#include "sysLib.h"
#include "vxLib.h"
#include "stdio.h"
#include "intLib.h"
#include "logLib.h"
#include "string.h"
#include "netLib.h"
#include "stdlib.h"
#include "semLib.h"
#include "drv/intrCtl/i8259a.h"
#include "drv/netif/if_ene.h"


/***** externals *****/

/* whirlyGig writes to the first or second alphanumeric LED on the
 * board whenever the netcard's interrupt handler is called
 */
void whirlyGig (unsigned int position, int counter); 

/***** defines *****/

#if CPU==SH7729
#define NENE    2                       /* number of boards supported */

#define ENE_INTCONNECT pciIntConnect
#else

#define NENE    4                       /* number of boards supported */

#undef ENE_DEBUG          /* define to include error/status messages. */
#endif

#ifndef ENE_INTCONNECT
#define ENE_INTCONNECT intConnect
#endif

/***** typedefs *****/

/* Typedefs for external structures that are not typedef'd in their .h files */

typedef struct mbuf MBUF;
typedef struct arpcom IDR;                  /* Interface Data Record wrapper */
typedef struct ifnet IFNET;                 /* real Interface Data Record */
typedef struct sockaddr SOCK;

typedef struct 
    {
    IDR         es_ac;
#define es_if           es_ac.ac_if
#define es_enaddr       es_ac.ac_enaddr
    BOOL        attached;
    USHORT      eneAddr;
    UINT        memAddr;
    UINT        memSize;
    int         intLevel;
    int         intVec;
    int         config;
    ENE_STAT    eneStat;
    volatile UCHAR current;             /* current-page register at interrupt */
    UCHAR       nextPacket;             /* where the next received packet is */
    UCHAR       rxFilter;               /* receiver configuration */
    UCHAR       imask;
    int         flags;
    UINT        txreq;
    char        packetBuf [MAX_FRAME_SIZE];/* shared at task level between */
                                        /* eneGet and enePut */
    } ENE_SOFTC;


/***** locals *****/

/*
 * Ethernet software status per interface.
 *
 * Each interface is referenced by a network interface structure,
 * es_if, which the routing code uses to locate the interface.
 * This structure contains the output queue for the interface, its address, ...
 */

LOCAL ENE_SOFTC * pEneSoftc [NENE];


/***** forward declarations *****/

static void     enereset (int unit);
static int      eneinit (int unit);
static void     eneintr (int unit);
static int      eneioctl (IFNET * ifp, int cmd, caddr_t data);
#ifdef BSD43_DRIVER
static int      eneoutput (IFNET * ifp, MBUF * m0, SOCK * dst);
#endif
static void     eneGet (int unit);
#ifdef BSD43_DRIVER
static void     enePut (int unit);
#else
static void     enePut (ENE_SOFTC * pSoftc);
#endif
static void     eneReset (int unit);
static void     eneBoardReset (int unit);
static void     eneGetAddr (int unit);
static void     eneInit (int unit);
static void     eneDataOut (int unit, char * pData, UINT16 len,
                            UINT16 eneAddress);
static void     eneDataIn (int unit, UINT16 eneAddress, UINT16 len,
                           char * pData);
static UCHAR    eneGetCurr (int unit);
static void     eneIntEnable (int unit);
static void     eneOverwriteRecover (int unit, UCHAR cmdStatus);
       void     eneShow (int unit, BOOL zap);
       void     enedetach (int unit);


/*******************************************************************************
*
* eneattach - publish the `ene' network interface and initialize the driver and device
*
* This routine attaches an `ene' Ethernet interface to the network if the
* device exists.  It makes the interface available by filling in the network
* interface record.  The system will initialize the interface when it is
* ready to accept packets.
*
* RETURNS: OK or ERROR.
*
* SEE ALSO: ifLib, netShow
*/

STATUS eneattach 
    (
    int unit,           /* unit number */
    int ioAddr,         /* address of ene's shared memory */
    int ivec,           /* interrupt vector to connect to */
    int ilevel          /* interrupt level */
    )
    {
    FAST ENE_SOFTC * pSoftc;

    if ((UINT)unit >= NENE)
        {
        errnoSet (S_iosLib_CONTROLLER_NOT_PRESENT);
        return (ERROR);
        }

    if (pEneSoftc [unit] == NULL)
        {
        pEneSoftc [unit] = malloc (sizeof (ENE_SOFTC));
        if (pEneSoftc [unit] == NULL)
            return (ERROR);
        bzero ( (char *) pEneSoftc [unit], sizeof (ENE_SOFTC));
        }
    pSoftc = pEneSoftc [unit];
    if (pSoftc->attached)
        return (ERROR);

    pSoftc->eneAddr     = ioAddr;
    if (ilevel < 0 || ilevel > 14)	/* Valid int Level ? */
        ilevel = 3;                     /* default is IRQ3 */
    pSoftc->intLevel    = ilevel;
    pSoftc->intVec      = ivec;

    pSoftc->rxFilter = RCON_BROAD;

    eneBoardReset (unit);               /* power-on initialization */

    eneInit (unit);                     /* initialize ENE */

    (void) ENE_INTCONNECT ((VOIDFUNCPTR *) INUM_TO_IVEC (ivec), 
        (VOIDFUNCPTR) eneintr, unit);

    /* enable interrupt */

    eneIntEnable (unit);

    sysIntEnablePIC (ilevel);

#ifdef BSD43_DRIVER
    ether_attach (&pSoftc->es_if, unit, "ene",
                  (FUNCPTR)eneinit, (FUNCPTR)eneioctl,
                  (FUNCPTR)eneoutput, (FUNCPTR)enereset);
#else
    ether_attach (
                 &pSoftc->es_if, 
                 unit, 
                 "ene",
                 (FUNCPTR)eneinit, 
                 (FUNCPTR)eneioctl,
                 (FUNCPTR)ether_output, 
                 (FUNCPTR)enereset
                 );
     pSoftc->es_if.if_start = (FUNCPTR)enePut;
#endif

    eneinit (unit);

    pSoftc->attached = TRUE;

    return (OK);
    }

/*******************************************************************************
*
* enereset - reset the interface
*/

static void enereset 
    (
    int unit 
    )
    {
    eneReset (unit);
    }

/*******************************************************************************
*
* eneinit - initialize ene
*
* Restart the link level software on the board and mark the interface up.
*
* RETURNS: 0
*/

static int eneinit 
    (
    int unit 
    )
    {
    FAST ENE_SOFTC * pSoftc = pEneSoftc [unit];

    pSoftc->es_if.if_flags |= IFF_UP|IFF_RUNNING; /* open for business*/

    return (0);
    }

/*******************************************************************************
*
* eneintr - Ethernet interface interrupt
*
* Hand off reading of packets from the interface to task level.
* Tabulate any transmit errors and cue task level to start next output.
*/

static void eneintr 
    (
    int unit 
    )
    {
    FAST ENE_SOFTC * pSoftc = pEneSoftc [unit];
    UCHAR intStat;
    UCHAR txStat;
    UCHAR rxStat;
    UCHAR cmdStat;

    pSoftc->eneStat.interrupts++;
#if CPU==SH7729
    whirlyGig ((unsigned int) unit, pSoftc->eneStat.interrupts);
#endif
    sysBusIntAck (pSoftc->intLevel);                    /* acknowledge int */

    /* acknowledge interrupt, get Transmit/Receive status */

    intStat = sysInByte (ENE_INTSTAT (pSoftc->eneAddr));
    sysOutByte (ENE_INTSTAT (pSoftc->eneAddr), intStat);
    txStat = sysInByte (ENE_TSTAT (pSoftc->eneAddr));
    rxStat = sysInByte (ENE_RSTAT (pSoftc->eneAddr));

    /* get xxxCount Reg that is cleared after read access */

    pSoftc->eneStat.collisions += sysInByte (ENE_COLCNT (pSoftc->eneAddr));
    pSoftc->eneStat.aligns += sysInByte (ENE_ALICNT (pSoftc->eneAddr));
    pSoftc->eneStat.crcs += sysInByte (ENE_CRCCNT (pSoftc->eneAddr));
    pSoftc->eneStat.missed += sysInByte (ENE_MPCNT (pSoftc->eneAddr));


    if (intStat & ISTAT_OVW) /* Overwrite */
        {
        pSoftc->es_if.if_ierrors++;
        pSoftc->eneStat.overwrite++;
        cmdStat = sysInByte (ENE_CMD (pSoftc->eneAddr));
        sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 0);/* disable board ints.*/
        sysOutByte (ENE_CMD (pSoftc->eneAddr),
                    CMD_NODMA | CMD_PAGE0 | CMD_STOP);
        (void) netJobAdd ( (FUNCPTR)eneOverwriteRecover, unit, cmdStat, 0, 0,0);
        }
    if (intStat & ISTAT_RXE) /* Receive-error */
        {
        pSoftc->es_if.if_ierrors++;
        pSoftc->eneStat.rerror++;
        if (rxStat & RSTAT_OVER)
            pSoftc->eneStat.overruns++;
        if (rxStat & RSTAT_DIS)
            pSoftc->eneStat.disabled++;
        if (rxStat & RSTAT_DFR)
            pSoftc->eneStat.deferring++;
        }
    if (intStat & ISTAT_PRX) /* Receive */
        {
        pSoftc->current = eneGetCurr (unit);
        if ((pSoftc->flags & RXING) == 0)
            {
            pSoftc->flags |= RXING;
            (void) netJobAdd ((FUNCPTR)eneGet, unit, 0,0,0,0);
            }
        }

    if ( (intStat & ISTAT_TXE) != 0)    /* Transmit error-packet not sent */
        {
        pSoftc->es_if.if_oerrors++;
        pSoftc->es_if.if_opackets--;
        pSoftc->eneStat.terror++;
        if (txStat & TSTAT_ABORT)
            {
            pSoftc->eneStat.aborts++;