w89c840.c File Reference

#include "etherboot.h"
#include "nic.h"
#include <ipxe/pci.h>
#include <ipxe/ethernet.h>

Go to the source code of this file.

Data Structures
struct	w840_rx_desc
struct	w840_tx_desc
struct	winbond_private
struct	w89c840_bss

Macros
#define	USE_IO_OPS
#define	virt_to_le32desc(addr)   virt_to_bus(addr)
#define	le32desc_to_virt(addr)   bus_to_virt(addr)
#define	TX_RING_SIZE   2
#define	RX_RING_SIZE   2
#define	TX_FIFO_SIZE   (2048)
#define	TX_BUG_FIFO_LIMIT   (TX_FIFO_SIZE-1514-16)
#define	TX_TIMEOUT   (10*1000)
#define	PKT_BUF_SZ   1536 /* Size of each temporary Rx buffer.*/
#define	W840_FLAGS   (PCI_USES_IO | PCI_ADDR0 | PCI_USES_MASTER)
#define	readb   inb
#define	readw   inw
#define	readl   inl
#define	writeb   outb
#define	writew   outw
#define	writel   outl
#define	PRIV_ALIGN   15 /* Required alignment mask */
#define	PRIV_ALIGN_BYTES   32
#define	w89c840_buf   NIC_FAKE_BSS ( struct w89c840_bss )
#define	PCI_VENDOR_ID_WINBOND2   0x1050
#define	PCI_DEVICE_ID_WINBOND2_89C840   0x0840
#define	PCI_VENDOR_ID_COMPEX   0x11f6
#define	PCI_DEVICE_ID_COMPEX_RL100ATX   0x2011
#define	eeprom_delay(ee_addr)   readl(ee_addr)
#define	mdio_delay(mdio_addr)   readl(mdio_addr)
#define	MDIO_WRITE0   (MDIO_EnbOutput)
#define	MDIO_WRITE1   (MDIO_DataOut | MDIO_EnbOutput)

Enumerations
enum	chip_capability_flags { CanHaveMII = 1, KendinPktDropBug = 2, CanHaveMII =1, HasBrokenTx =2 }
enum	w840_offsets {   PCIBusCfg =0x00, TxStartDemand =0x04, RxStartDemand =0x08, RxRingPtr =0x0C,   TxRingPtr =0x10, IntrStatus =0x14, NetworkConfig =0x18, IntrEnable =0x1C,   RxMissed =0x20, EECtrl =0x24, MIICtrl =0x24, BootRom =0x28,   GPTimer =0x2C, CurRxDescAddr =0x30, CurRxBufAddr =0x34, MulticastFilter0 =0x38,   MulticastFilter1 =0x3C, StationAddr =0x40, CurTxDescAddr =0x4C, CurTxBufAddr =0x50 }
enum	intr_status_bits {   IntrSummary = 0x0001, IntrPCIErr = 0x0002, IntrMACCtrl = 0x0008, IntrTxDone = 0x0004,   IntrRxDone = 0x0010, IntrRxStart = 0x0020, IntrDrvRqst = 0x0040, StatsMax = 0x0080,   LinkChange = 0x0100, IntrTxDMADone = 0x0200, IntrRxDMADone = 0x0400, NormalIntr =0x10000,   AbnormalIntr =0x8000, IntrPCIErr =0x2000, TimerInt =0x800, IntrRxDied =0x100,   RxNoBuf =0x80, IntrRxDone =0x40, TxFIFOUnderflow =0x20, RxErrIntr =0x10,   TxIdle =0x04, IntrTxStopped =0x02, IntrTxDone =0x01 }
enum	rx_mode_bits {   AcceptAllIPMulti = 0x20, AcceptMultiHash = 0x10, AcceptAll = 0x08, AcceptBroadcast = 0x04,   AcceptMulticast = 0x02, AcceptMyPhys, AcceptErr =0x80, AcceptRunt =0x40,   AcceptBroadcast =0x20, AcceptMulticast =0x10, AcceptAllPhys =0x08, AcceptMyPhys =0x02 }
enum	mii_reg_bits {   MDIO_ShiftClk = 0x0001, MDIO_Data = 0x0002, MDIO_EnbOutput, MDIO_ShiftClk =0x10000,   MDIO_DataIn =0x80000, MDIO_DataOut =0x20000, MDIO_EnbOutput =0x40000, MDIO_EnbIn = 0x00000 }
enum	desc_status_bits {   DescOwn = 0x8000, DescEndPacket = 0x4000, DescEndRing = 0x2000, LastFrag = 0x80000000,   DescIntrOnTx = 0x8000, DescIntrOnDMADone = 0x80000000, DisableAlign = 0x00000001, DescOwnded =0x80000000,   RxDescFatalErr =0x8000, RxWholePkt =0x0300, DescOwn =0x80000000, DescEndRing =0x02000000,   DescUseLink =0x01000000, DescWholePkt =0x60000000, DescStartPkt =0x20000000, DescEndPkt =0x40000000,   DescIntr =0x80000000 }
enum	EEPROM_Ctrl_Bits {   EE_ShiftClk =0x02, EE_Write0 =0x801, EE_Write1 =0x805, EE_ChipSelect =0x801,   EE_DataIn =0x08 }
enum	EEPROM_Cmds { EE_WriteCmd =(5 << 6), EE_ReadCmd =(6 << 6), EE_EraseCmd =(7 << 6) }

Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	eeprom_read (long ioaddr, int location)
static int	mdio_read (int base_address, int phy_id, int location)
static void	check_duplex (void)
static void	set_rx_mode (void)
static void	init_ring (void)
static void	w89c840_reset (struct nic *nic)
static int	w89c840_poll (struct nic *nic, int retrieve)
static void	w89c840_transmit (struct nic *nic, const char *d, unsigned int t, unsigned int s, const char *p)
static void	w89c840_disable (struct nic *nic, void *hwdev __unused)
static void	w89c840_irq (struct nic *nic __unused, irq_action_t action __unused)
	PCI_DRIVER (w89c840_driver, w89c840_nics, PCI_NO_CLASS)
static int	w89c840_probe (struct nic *nic, struct pci_device *p)
static void	mdio_sync (long mdio_addr)
	DRIVER ("W89C840F", nic_driver, pci_driver, w89c840_driver, w89c840_probe, w89c840_disable, w89c840_buf)

Variables
static const char *	w89c840_version = "driver Version 0.94 - December 12, 2003"
static u32	driver_flags = CanHaveMII | HasBrokenTx
static struct winbond_private	w840private
static int	ioaddr
static unsigned short	eeprom [0x40]
static struct nic_operations	w89c840_operations
static struct pci_device_id	w89c840_nics []
static char	mii_preamble_required = 1

Macro Definition Documentation

USE_IO_OPS

#define USE_IO_OPS

Definition at line 81 of file w89c840.c.

virt_to_le32desc

#define virt_to_le32desc

(

addr

)

virt_to_bus(addr)

Definition at line 91 of file w89c840.c.

le32desc_to_virt

#define le32desc_to_virt

(

addr

)

bus_to_virt(addr)

Definition at line 92 of file w89c840.c.

TX_RING_SIZE

#define TX_RING_SIZE   2

Definition at line 106 of file w89c840.c.

RX_RING_SIZE

#define RX_RING_SIZE   2

Definition at line 107 of file w89c840.c.

TX_FIFO_SIZE

#define TX_FIFO_SIZE   (2048)

Definition at line 113 of file w89c840.c.

TX_BUG_FIFO_LIMIT

#define TX_BUG_FIFO_LIMIT   (TX_FIFO_SIZE-1514-16)

Definition at line 114 of file w89c840.c.

TX_TIMEOUT

#define TX_TIMEOUT   (10*1000)

Definition at line 118 of file w89c840.c.

PKT_BUF_SZ

#define PKT_BUF_SZ   1536 /* Size of each temporary Rx buffer.*/

Definition at line 120 of file w89c840.c.

W840_FLAGS

#define W840_FLAGS   (PCI_USES_IO | PCI_ADDR0 | PCI_USES_MASTER)

Definition at line 137 of file w89c840.c.

readb

#define readb   inb

Definition at line 155 of file w89c840.c.

readw

#define readw   inw

Definition at line 156 of file w89c840.c.

readl

#define readl   inl

Definition at line 157 of file w89c840.c.

writeb

#define writeb   outb

Definition at line 158 of file w89c840.c.

writew

#define writew   outw

Definition at line 159 of file w89c840.c.

writel

#define writel   outl

Definition at line 160 of file w89c840.c.

PRIV_ALIGN

#define PRIV_ALIGN   15 /* Required alignment mask */

Definition at line 221 of file w89c840.c.

PRIV_ALIGN_BYTES

#define PRIV_ALIGN_BYTES   32

Definition at line 222 of file w89c840.c.

w89c840_buf

#define w89c840_buf   NIC_FAKE_BSS ( struct w89c840_bss )

Definition at line 261 of file w89c840.c.

PCI_VENDOR_ID_WINBOND2

#define PCI_VENDOR_ID_WINBOND2   0x1050

PCI_DEVICE_ID_WINBOND2_89C840

#define PCI_DEVICE_ID_WINBOND2_89C840   0x0840

PCI_VENDOR_ID_COMPEX

#define PCI_VENDOR_ID_COMPEX   0x11f6

PCI_DEVICE_ID_COMPEX_RL100ATX

#define PCI_DEVICE_ID_COMPEX_RL100ATX   0x2011

eeprom_delay

#define eeprom_delay

(

ee_addr

)

readl(ee_addr)

Definition at line 735 of file w89c840.c.

mdio_delay

#define mdio_delay

(

mdio_addr

)

readl(mdio_addr)

Definition at line 785 of file w89c840.c.

MDIO_WRITE0

#define MDIO_WRITE0   (MDIO_EnbOutput)

Definition at line 792 of file w89c840.c.

MDIO_WRITE1

#define MDIO_WRITE1   (MDIO_DataOut | MDIO_EnbOutput)

Definition at line 793 of file w89c840.c.

Enumeration Type Documentation

chip_capability_flags

enum chip_capability_flags

Enumerator
CanHaveMII
KendinPktDropBug
CanHaveMII
HasBrokenTx

Definition at line 134 of file w89c840.c.

{CanHaveMII=1, HasBrokenTx=2};

w840_offsets

enum w840_offsets

Enumerator
PCIBusCfg
TxStartDemand
RxStartDemand
RxRingPtr
TxRingPtr
IntrStatus
NetworkConfig
IntrEnable
RxMissed
EECtrl
MIICtrl
BootRom
GPTimer
CurRxDescAddr
CurRxBufAddr
MulticastFilter0
MulticastFilter1
StationAddr
CurTxDescAddr
CurTxBufAddr

Definition at line 169 of file w89c840.c.

                  {
    PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08,
    RxRingPtr=0x0C, TxRingPtr=0x10,
    IntrStatus=0x14, NetworkConfig=0x18, IntrEnable=0x1C,
    RxMissed=0x20, EECtrl=0x24, MIICtrl=0x24, BootRom=0x28, GPTimer=0x2C,
    CurRxDescAddr=0x30, CurRxBufAddr=0x34,            /* Debug use */
    MulticastFilter0=0x38, MulticastFilter1=0x3C, StationAddr=0x40,
    CurTxDescAddr=0x4C, CurTxBufAddr=0x50,
};

intr_status_bits

enum intr_status_bits

Enumerator
IntrSummary
IntrPCIErr
IntrMACCtrl
IntrTxDone
IntrRxDone
IntrRxStart
IntrDrvRqst
StatsMax
LinkChange
IntrTxDMADone
IntrRxDMADone
NormalIntr
AbnormalIntr
IntrPCIErr
TimerInt
IntrRxDied
RxNoBuf
IntrRxDone
TxFIFOUnderflow
RxErrIntr
TxIdle
IntrTxStopped
IntrTxDone

Definition at line 181 of file w89c840.c.

                      {
    NormalIntr=0x10000, AbnormalIntr=0x8000,
    IntrPCIErr=0x2000, TimerInt=0x800,
    IntrRxDied=0x100, RxNoBuf=0x80, IntrRxDone=0x40,
    TxFIFOUnderflow=0x20, RxErrIntr=0x10,
    TxIdle=0x04, IntrTxStopped=0x02, IntrTxDone=0x01,
};

rx_mode_bits

enum rx_mode_bits

Enumerator
AcceptAllIPMulti
AcceptMultiHash
AcceptAll
AcceptBroadcast
AcceptMulticast
AcceptMyPhys
AcceptErr
AcceptRunt
AcceptBroadcast
AcceptMulticast
AcceptAllPhys
AcceptMyPhys

Definition at line 190 of file w89c840.c.

                  {
    AcceptErr=0x80, AcceptRunt=0x40,
    AcceptBroadcast=0x20, AcceptMulticast=0x10,
    AcceptAllPhys=0x08, AcceptMyPhys=0x02,
};

mii_reg_bits

enum mii_reg_bits

Enumerator
MDIO_ShiftClk
MDIO_Data
MDIO_EnbOutput
MDIO_ShiftClk
MDIO_DataIn
MDIO_DataOut
MDIO_EnbOutput
MDIO_EnbIn

Definition at line 196 of file w89c840.c.

                  {
    MDIO_ShiftClk=0x10000, MDIO_DataIn=0x80000, MDIO_DataOut=0x20000,
    MDIO_EnbOutput=0x40000, MDIO_EnbIn = 0x00000,
};

desc_status_bits

enum desc_status_bits

Enumerator
DescOwn
DescEndPacket
DescEndRing
LastFrag
DescIntrOnTx
DescIntrOnDMADone
DisableAlign
DescOwnded
RxDescFatalErr
RxWholePkt
DescOwn
DescEndRing
DescUseLink
DescWholePkt
DescStartPkt
DescEndPkt
DescIntr

Definition at line 216 of file w89c840.c.

                      {
    DescOwn=0x80000000, DescEndRing=0x02000000, DescUseLink=0x01000000,
    DescWholePkt=0x60000000, DescStartPkt=0x20000000, DescEndPkt=0x40000000,
    DescIntr=0x80000000,
};

EEPROM_Ctrl_Bits

enum EEPROM_Ctrl_Bits

Enumerator
EE_ShiftClk
EE_Write0
EE_Write1
EE_ChipSelect
EE_DataIn

Definition at line 737 of file w89c840.c.

                      {
    EE_ShiftClk=0x02, EE_Write0=0x801, EE_Write1=0x805,
    EE_ChipSelect=0x801, EE_DataIn=0x08,
};

EEPROM_Cmds

enum EEPROM_Cmds

Enumerator
EE_WriteCmd
EE_ReadCmd
EE_EraseCmd

Definition at line 743 of file w89c840.c.

                 {
    EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
};

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER

)

eeprom_read()

static int eeprom_read ( long  ioaddr, int  location  )

static

Definition at line 747 of file w89c840.c.

{
    int i;
    int retval = 0;
    int ee_addr = addr + EECtrl;
    int read_cmd = location | EE_ReadCmd;
    writel(EE_ChipSelect, ee_addr);

    /* Shift the read command bits out. */
    for (i = 10; i >= 0; i--) {
        short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
        writel(dataval, ee_addr);
        eeprom_delay(ee_addr);
        writel(dataval | EE_ShiftClk, ee_addr);
        eeprom_delay(ee_addr);
    }
    writel(EE_ChipSelect, ee_addr);

    for (i = 16; i > 0; i--) {
        writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
        eeprom_delay(ee_addr);
        retval = (retval << 1) | ((readl(ee_addr) & EE_DataIn) ? 1 : 0);
        writel(EE_ChipSelect, ee_addr);
        eeprom_delay(ee_addr);
    }

    /* Terminate the EEPROM access. */
    writel(0, ee_addr);
    return retval;
}

References addr, EE_ChipSelect, EE_DataIn, EE_ReadCmd, EE_ShiftClk, EE_Write0, EE_Write1, EECtrl, eeprom_delay, read_cmd, readl, retval, and writel.

Referenced by w89c840_probe().

mdio_read()

static int mdio_read ( int  base_address, int  phy_id, int  location  )

static

Definition at line 810 of file w89c840.c.

{
    long mdio_addr = base_address + MIICtrl;
    int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
    int i, retval = 0;

    if (mii_preamble_required)
        mdio_sync(mdio_addr);

    /* Shift the read command bits out. */
    for (i = 15; i >= 0; i--) {
        int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;

        writel(dataval, mdio_addr);
        mdio_delay(mdio_addr);
        writel(dataval | MDIO_ShiftClk, mdio_addr);
        mdio_delay(mdio_addr);
    }
    /* Read the two transition, 16 data, and wire-idle bits. */
    for (i = 20; i > 0; i--) {
        writel(MDIO_EnbIn, mdio_addr);
        mdio_delay(mdio_addr);
        retval = (retval << 1) | ((readl(mdio_addr) & MDIO_DataIn) ? 1 : 0);
        writel(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
        mdio_delay(mdio_addr);
    }
    return (retval>>1) & 0xffff;
}

References MDIO_DataIn, mdio_delay, MDIO_EnbIn, MDIO_ShiftClk, mdio_sync(), MDIO_WRITE0, MDIO_WRITE1, mii_preamble_required, MIICtrl, readl, retval, and writel.

Referenced by check_duplex(), and w89c840_probe().

check_duplex()

static void check_duplex ( void  )

static

Definition at line 872 of file w89c840.c.

{
    int mii_reg5 = mdio_read(ioaddr, w840private.phys[0], 5);
    int negotiated =  mii_reg5 & w840private.advertising;
    int duplex;

    if (w840private.duplex_lock  ||  mii_reg5 == 0xffff)
        return;

    duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
    if (w840private.full_duplex != duplex) {
        w840private.full_duplex = duplex;       

#if defined(W89C840_DEBUG)
        printf("winbond-840 : Setting %s-duplex based on MII # %d negotiated capability %X\n",
               duplex ? "full" : "half", w840private.phys[0], negotiated);
#endif

        w840private.csr6 &= ~0x200;
        w840private.csr6 |= duplex ? 0x200 : 0;
    }
}

References winbond_private::advertising, winbond_private::csr6, winbond_private::duplex_lock, winbond_private::full_duplex, ioaddr, mdio_read(), winbond_private::phys, printf(), and w840private.

Referenced by w89c840_reset().

set_rx_mode()

static void set_rx_mode ( void  )

static

Definition at line 895 of file w89c840.c.

{
    u32 mc_filter[2];            /* Multicast hash filter */
    u32 rx_mode;

    /* Accept all multicasts from now on. */
    memset(mc_filter, 0xff, sizeof(mc_filter));

/*
 * works OK with multicast enabled. 
 */

    rx_mode = AcceptBroadcast | AcceptMyPhys | AcceptMulticast;

    writel(mc_filter[0], ioaddr + MulticastFilter0);
    writel(mc_filter[1], ioaddr + MulticastFilter1);
    w840private.csr6 &= ~0x00F8;
    w840private.csr6 |= rx_mode;
    writel(w840private.csr6, ioaddr + NetworkConfig);

#if defined(W89C840_DEBUG)
    printf("winbond-840 : Done setting RX mode.\n");
#endif
}

References AcceptBroadcast, AcceptMulticast, AcceptMyPhys, winbond_private::csr6, ioaddr, memset(), MulticastFilter0, MulticastFilter1, NetworkConfig, printf(), w840private, and writel.

Referenced by w89c840_reset().

init_ring()

static void init_ring ( void  )

static

Definition at line 921 of file w89c840.c.

{
    int i;
    char * p;

    w840private.tx_full = 0;
    w840private.tx_q_bytes = w840private.cur_rx = w840private.cur_tx = 0;
    w840private.dirty_rx = w840private.dirty_tx = 0;

    w840private.rx_buf_sz = PKT_BUF_SZ;
    w840private.rx_head_desc = &w840private.rx_ring[0];

    /* Initial all Rx descriptors. Fill in the Rx buffers. */

    p = &w89c840_buf.rx_packet[0];

    for (i = 0; i < RX_RING_SIZE; i++) {
        w840private.rx_ring[i].length = w840private.rx_buf_sz;
        w840private.rx_ring[i].status = 0;
        w840private.rx_ring[i].next_desc = virt_to_le32desc(&w840private.rx_ring[i+1]);

        w840private.rx_ring[i].buffer1 = virt_to_le32desc(p + (PKT_BUF_SZ * i));
        w840private.rx_ring[i].status = DescOwn | DescIntr;
    }

    /* Mark the last entry as wrapping the ring. */
    w840private.rx_ring[i-1].length |= DescEndRing;
    w840private.rx_ring[i-1].next_desc = virt_to_le32desc(&w840private.rx_ring[0]);

    w840private.dirty_rx = (unsigned int)(i - RX_RING_SIZE);

    for (i = 0; i < TX_RING_SIZE; i++) {
        w840private.tx_ring[i].status = 0;
    }
    return;
}

References w840_rx_desc::buffer1, winbond_private::cur_rx, winbond_private::cur_tx, DescEndRing, DescIntr, DescOwn, winbond_private::dirty_rx, winbond_private::dirty_tx, w840_rx_desc::length, w840_rx_desc::next_desc, PKT_BUF_SZ, winbond_private::rx_buf_sz, winbond_private::rx_head_desc, winbond_private::rx_ring, RX_RING_SIZE, w840_rx_desc::status, w840_tx_desc::status, winbond_private::tx_full, winbond_private::tx_q_bytes, winbond_private::tx_ring, TX_RING_SIZE, virt_to_le32desc, w840private, and w89c840_buf.

Referenced by w89c840_reset().

w89c840_reset()

static void w89c840_reset ( struct nic *  nic )

static

Definition at line 302 of file w89c840.c.

{
    int i;

    /* Reset the chip to erase previous misconfiguration.
       No hold time required! */
    writel(0x00000001, ioaddr + PCIBusCfg);

    init_ring();

    writel(virt_to_bus(w840private.rx_ring), ioaddr + RxRingPtr);
    writel(virt_to_bus(w840private.tx_ring), ioaddr + TxRingPtr);

    for (i = 0; i < ETH_ALEN; i++)
        writeb(nic->node_addr[i], ioaddr + StationAddr + i);

    /* Initialize other registers. */
    /* Configure the PCI bus bursts and FIFO thresholds.
       486: Set 8 longword cache alignment, 8 longword burst.
       586: Set 16 longword cache alignment, no burst limit.
       Cache alignment bits 15:14         Burst length 13:8
        0000    <not allowed>         0000 align to cache    0800 8 longwords
        4000    8  longwords        0100 1 longword        1000 16 longwords
        8000    16 longwords        0200 2 longwords    2000 32 longwords
        C000    32  longwords        0400 4 longwords
       Wait the specified 50 PCI cycles after a reset by initializing
       Tx and Rx queues and the address filter list. */

    writel(0xE010, ioaddr + PCIBusCfg);

    writel(0, ioaddr + RxStartDemand);
    w840private.csr6 = 0x20022002;
    check_duplex();
    set_rx_mode();

    /* Do not enable the interrupts Etherboot doesn't need them */
/*
    writel(0x1A0F5, ioaddr + IntrStatus);
    writel(0x1A0F5, ioaddr + IntrEnable);
*/
#if defined(W89C840_DEBUG)
    printf("winbond-840 : Done reset.\n");
#endif
}

References check_duplex(), winbond_private::csr6, ETH_ALEN, init_ring(), ioaddr, nic::node_addr, PCIBusCfg, printf(), winbond_private::rx_ring, RxRingPtr, RxStartDemand, set_rx_mode(), StationAddr, winbond_private::tx_ring, TxRingPtr, virt_to_bus(), w840private, writeb, and writel.

Referenced by w89c840_disable(), w89c840_poll(), and w89c840_probe().

w89c840_poll()

static int w89c840_poll ( struct nic *  nic, int  retrieve  )

static

Definition at line 378 of file w89c840.c.

{
    /* return true if there's an ethernet packet ready to read */
    /* nic->packet should contain data on return */
    /* nic->packetlen should contain length of data */
    int packet_received = 0;

#if defined(W89C840_DEBUG)
    u32 intr_status = readl(ioaddr + IntrStatus);
#endif

    do {
        /* Code from netdev_rx(dev) */

        int entry = w840private.cur_rx % RX_RING_SIZE;

        struct w840_rx_desc *desc = w840private.rx_head_desc;
        s32 status = desc->status;

        if (status & DescOwn) {
            /* DescOwn bit is still set, we should wait for RX to complete */
            packet_received = 0;
            break;
        }

        if ( !retrieve ) {
            packet_received = 1;
            break;
        }

        if ((status & 0x38008300) != 0x0300) {
            if ((status & 0x38000300) != 0x0300) {
                /* Ingore earlier buffers. */
                if ((status & 0xffff) != 0x7fff) {
                    printf("winbond-840 : Oversized Ethernet frame spanned "
                           "multiple buffers, entry %d status %X !\n",
                           w840private.cur_rx, (unsigned int) status);
                }
            } else if (status & 0x8000) {
                /* There was a fatal error. */
#if defined(W89C840_DEBUG)
                printf("winbond-840 : Receive error, Rx status %X :", status);
                if (status & 0x0890) {
                    printf(" RXLEN_ERROR");
                }
                if (status & 0x004C) {
                    printf(", FRAME_ERROR");
                }
                if (status & 0x0002) {
                    printf(", CRC_ERROR");
                }
                printf("\n");
#endif

                /* Simpy do a reset now... */
                w89c840_reset(nic);

                packet_received = 0;
                break;
            }
        } else {
            /* Omit the four octet CRC from the length. */
            int pkt_len = ((status >> 16) & 0x7ff) - 4;

#if defined(W89C840_DEBUG)
            printf(" netdev_rx() normal Rx pkt ring %d length %d status %X\n", entry, pkt_len, status);
#endif

            nic->packetlen = pkt_len;

            /* Check if the packet is long enough to accept without copying
               to a minimally-sized skbuff. */

            memcpy(nic->packet, le32desc_to_virt(w840private.rx_ring[entry].buffer1), pkt_len);
            packet_received = 1;

            /* Release buffer to NIC */
            w840private.rx_ring[entry].status = DescOwn;

#if defined(W89C840_DEBUG)
            /* You will want this info for the initial debug. */
            printf("  Rx data %hhX:%hhX:%hhX:%hhX:%hhX:"
                   "%hhX %hhX:%hhX:%hhX:%hhX:%hhX:%hhX %hhX%hhX "
                   "%hhX.%hhX.%hhX.%hhX.\n",
                   nic->packet[0],  nic->packet[1],  nic->packet[2], nic->packet[3],
                   nic->packet[4],  nic->packet[5],  nic->packet[6], nic->packet[7],
                   nic->packet[8],  nic->packet[9],  nic->packet[10],
                   nic->packet[11], nic->packet[12], nic->packet[13],
                   nic->packet[14], nic->packet[15], nic->packet[16],
                   nic->packet[17]);
#endif

        }

        entry = (++w840private.cur_rx) % RX_RING_SIZE;
        w840private.rx_head_desc = &w840private.rx_ring[entry];
    } while (0);
    
    return packet_received;
}

References w840_rx_desc::buffer1, winbond_private::cur_rx, desc, DescOwn, IntrStatus, ioaddr, le32desc_to_virt, memcpy(), nic::packet, nic::packetlen, pkt_len, printf(), readl, winbond_private::rx_head_desc, winbond_private::rx_ring, RX_RING_SIZE, status, w840_rx_desc::status, w840private, and w89c840_reset().

w89c840_transmit()

static void w89c840_transmit ( struct nic *  nic, const char *  d, unsigned int  t, unsigned int  s, const char *  p  )

static

Definition at line 483 of file w89c840.c.

{
    /* send the packet to destination */
    unsigned entry;
    int transmit_status;
    unsigned long ct;

    /* Caution: the write order is important here, set the field
       with the "ownership" bits last. */

    /* Fill in our transmit buffer */
    entry = w840private.cur_tx % TX_RING_SIZE;

    memcpy (w89c840_buf.tx_packet, d, ETH_ALEN);    /* dst */
    memcpy (w89c840_buf.tx_packet + ETH_ALEN, nic->node_addr, ETH_ALEN);/*src*/

    *((char *) w89c840_buf.tx_packet + 12) = t >> 8;    /* type */
    *((char *) w89c840_buf.tx_packet + 13) = t;

    memcpy (w89c840_buf.tx_packet + ETH_HLEN, p, s);
    s += ETH_HLEN;

    while (s < ETH_ZLEN)
    *((char *) w89c840_buf.tx_packet + ETH_HLEN + (s++)) = 0;

    w840private.tx_ring[entry].buffer1
            = virt_to_le32desc(w89c840_buf.tx_packet);

    w840private.tx_ring[entry].length = (DescWholePkt | (u32) s);
    if (entry >= TX_RING_SIZE-1)         /* Wrap ring */
        w840private.tx_ring[entry].length |= (DescIntr | DescEndRing);
    w840private.tx_ring[entry].status = (DescOwn);
    w840private.cur_tx++;

    w840private.tx_q_bytes = (u16) s;
    writel(0, ioaddr + TxStartDemand);

    /* Work around horrible bug in the chip by marking the queue as full
       when we do not have FIFO room for a maximum sized packet. */

    if ((w840private.drv_flags & HasBrokenTx) && w840private.tx_q_bytes > TX_BUG_FIFO_LIMIT) {
        /* Actually this is left to help finding error tails later in debugging...
         * See Linux kernel driver in winbond-840.c for details.
         */
        w840private.tx_full = 1;
    }

#if defined(W89C840_DEBUG)
    printf("winbond-840 : Transmit frame # %d size %d queued in slot %d.\n", w840private.cur_tx, s, entry);
#endif

    /* Now wait for TX to complete. */
    transmit_status = w840private.tx_ring[entry].status;

    ct = currticks();
    {
#if defined W89C840_DEBUG
        u32 intr_stat = 0;
#endif
        while (1) {

#if defined(W89C840_DEBUG)
              decode_interrupt(intr_stat);
#endif

                while ( (transmit_status & DescOwn) && ct + TX_TIMEOUT < currticks()) {

                    transmit_status = w840private.tx_ring[entry].status;
                }

                break;
        }
    }

    if ((transmit_status & DescOwn) == 0) {

#if defined(W89C840_DEBUG)
        printf("winbond-840 : transmission complete after wait loop iterations, status %X\n",
                w840private.tx_ring[entry].status);
#endif

        return;
    }

    /* Transmit timed out... */

    printf("winbond-840 : transmission TIMEOUT : status %X\n", 
           (unsigned int) w840private.tx_ring[entry].status);

    return;
}

References w840_tx_desc::buffer1, winbond_private::cur_tx, currticks(), DescEndRing, DescIntr, DescOwn, DescWholePkt, winbond_private::drv_flags, ETH_ALEN, ETH_HLEN, ETH_ZLEN, HasBrokenTx, ioaddr, w840_tx_desc::length, memcpy(), nic::node_addr, printf(), w840_tx_desc::status, TX_BUG_FIFO_LIMIT, winbond_private::tx_full, winbond_private::tx_q_bytes, winbond_private::tx_ring, TX_RING_SIZE, TX_TIMEOUT, TxStartDemand, u16, u32, virt_to_le32desc, w840private, w89c840_buf, and writel.

w89c840_disable()

static void w89c840_disable ( struct nic *  nic, void *hwdev  __unused  )

static

Definition at line 583 of file w89c840.c.

                                                                      {

    w89c840_reset(nic);

    /* Don't know what to do to disable the board. Is this needed at all? */
    /* Yes, a live NIC can corrupt the loaded memory later [Ken] */
    /* Stop the chip's Tx and Rx processes. */
    writel(w840private.csr6 &= ~0x20FA, ioaddr + NetworkConfig);
}

References winbond_private::csr6, ioaddr, NetworkConfig, w840private, w89c840_reset(), and writel.

w89c840_irq()

static void w89c840_irq ( struct nic *nic  __unused, irq_action_t action  __unused  )

static

Definition at line 596 of file w89c840.c.

{
  switch ( action ) {
  case DISABLE :
    break;
  case ENABLE :
    break;
  case FORCE :
    break;
  }
}

References DISABLE, ENABLE, and FORCE.

PCI_DRIVER()

PCI_DRIVER	(	w89c840_driver	,
		w89c840_nics	,
		PCI_NO_CLASS
	)

w89c840_probe()

static int w89c840_probe ( struct nic *  nic, struct pci_device *  p  )

static

Definition at line 626 of file w89c840.c.

                                                                   {


    u16 sum = 0;
    int i;
    unsigned short value;

    if (p->ioaddr == 0)
        return 0;

    nic->ioaddr = p->ioaddr;
    nic->irqno  = 0;

#if defined(W89C840_DEBUG)
    printf("winbond-840: PCI bus %hhX device function %hhX: I/O address: %hX\n", p->bus, p->devfn, ioaddr);
#endif

    ioaddr = ioaddr & ~3; /* Mask the bit that says "this is an io addr" */

#define PCI_VENDOR_ID_WINBOND2          0x1050
#define PCI_DEVICE_ID_WINBOND2_89C840   0x0840
#define PCI_VENDOR_ID_COMPEX            0x11f6
#define PCI_DEVICE_ID_COMPEX_RL100ATX   0x2011

    /* From Matt Hortman <mbhortman@acpthinclient.com> */
    if (p->vendor == PCI_VENDOR_ID_WINBOND2
        && p->device == PCI_DEVICE_ID_WINBOND2_89C840) {

        /* detected "Winbond W89c840 Fast Ethernet PCI NIC" */

    } else if ( p->vendor == PCI_VENDOR_ID_COMPEX
                && p->device == PCI_DEVICE_ID_COMPEX_RL100ATX) {

        /* detected "Compex RL100ATX Fast Ethernet PCI NIC" */

    } else {
        /* Gee, guess what? They missed again. */
        printf("device ID : %X - is not a Compex RL100ATX NIC.\n",
               p->device);
        return 0;
    }

    printf(" %s\n", w89c840_version);

    adjust_pci_device(p);

    /* Ok. Got one. Read the eeprom. */
    for (i = 0; i < 0x40; i++) {
        value = eeprom_read(ioaddr, i);
        eeprom[i] = value;
        sum += value;
    }

    for (i=0;i<ETH_ALEN;i++) {
        nic->node_addr[i] =  (eeprom[i/2] >> (8*(i&1))) & 0xff;
    }

    DBG ( "Ethernet addr: %s\n", eth_ntoa ( nic->node_addr ) );

#if defined(W89C840_DEBUG)
    printf("winbond-840: EEPROM checksum %hX, got eeprom", sum);
#endif

    /* Reset the chip to erase previous misconfiguration.
       No hold time required! */
    writel(0x00000001, ioaddr + PCIBusCfg);

    if (driver_flags & CanHaveMII) {
        int phy, phy_idx = 0;
        for (phy = 1; phy < 32 && phy_idx < 4; phy++) {
            int mii_status = mdio_read(ioaddr, phy, 1);
            if (mii_status != 0xffff  &&  mii_status != 0x0000) {
                w840private.phys[phy_idx++] = phy;
                w840private.advertising = mdio_read(ioaddr, phy, 4);

#if defined(W89C840_DEBUG)
                printf("winbond-840 : MII PHY found at address %d, status "
                       "%X advertising %hX.\n", phy, mii_status, w840private.advertising);
#endif

            }
        }

        w840private.mii_cnt = phy_idx;

        if (phy_idx == 0) {
                printf("winbond-840 : MII PHY not found -- this device may not operate correctly.\n");
        }
    }

    /* point to NIC specific routines */
    nic->nic_op = &w89c840_operations;

    w89c840_reset(nic);

    return 1;
}

References adjust_pci_device(), winbond_private::advertising, CanHaveMII, DBG, pci_device::device, driver_flags, eeprom_read(), ETH_ALEN, eth_ntoa(), nic::ioaddr, pci_device::ioaddr, ioaddr, nic::irqno, mdio_read(), winbond_private::mii_cnt, nic::nic_op, nic::node_addr, PCI_DEVICE_ID_COMPEX_RL100ATX, PCI_DEVICE_ID_WINBOND2_89C840, PCI_VENDOR_ID_COMPEX, PCI_VENDOR_ID_WINBOND2, PCIBusCfg, winbond_private::phys, printf(), value, pci_device::vendor, w840private, w89c840_operations, w89c840_reset(), w89c840_version, and writel.

mdio_sync()

static void mdio_sync ( long  mdio_addr )

static

Definition at line 797 of file w89c840.c.

{
    int bits = 32;

    /* Establish sync by sending at least 32 logic ones. */
    while (--bits >= 0) {
        writel(MDIO_WRITE1, mdio_addr);
        mdio_delay(mdio_addr);
        writel(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
        mdio_delay(mdio_addr);
    }
}

References bits, mdio_delay, MDIO_ShiftClk, MDIO_WRITE1, and writel.

Referenced by mdio_read().

DRIVER()

DRIVER	(	"W89C840F"	,
		nic_driver	,
		pci_driver	,
		w89c840_driver	,
		w89c840_probe	,
		w89c840_disable	,
		w89c840_buf
	)

Variable Documentation

w89c840_version

const char* w89c840_version = "driver Version 0.94 - December 12, 2003"

static

Definition at line 88 of file w89c840.c.

Referenced by w89c840_probe().

driver_flags

u32 driver_flags = CanHaveMII | HasBrokenTx

static

Definition at line 142 of file w89c840.c.

Referenced by w89c840_probe().

w840private

struct winbond_private w840private

static

Referenced by check_duplex(), init_ring(), set_rx_mode(), w89c840_disable(), w89c840_poll(), w89c840_probe(), w89c840_reset(), and w89c840_transmit().

ioaddr

int ioaddr

static

Definition at line 255 of file w89c840.c.

Referenced by check_duplex(), set_rx_mode(), w89c840_disable(), w89c840_poll(), w89c840_probe(), w89c840_reset(), and w89c840_transmit().

eeprom

unsigned short eeprom[0x40]

static

Definition at line 256 of file w89c840.c.

w89c840_operations

struct nic_operations w89c840_operations

static

Initial value:

= {
        .connect        = dummy_connect,
        .poll           = w89c840_poll,
        .transmit       = w89c840_transmit,
        .irq            = w89c840_irq,

}

Definition at line 608 of file w89c840.c.

Referenced by w89c840_probe().

w89c840_nics

struct pci_device_id w89c840_nics[]

static

Initial value:

= {
PCI_ROM(0x1050, 0x0840, "winbond840",     "Winbond W89C840F", 0),
PCI_ROM(0x11f6, 0x2011, "compexrl100atx", "Compex RL100ATX", 0),
}

Definition at line 616 of file w89c840.c.

mii_preamble_required

char mii_preamble_required = 1

static

Definition at line 790 of file w89c840.c.

Referenced by mdio_read().