OpenSolaris_b135/grub/grub-0.97/netboot/3c90x.c
/*
* 3c90x.c -- This file implements the 3c90x driver for etherboot. Written
* by Greg Beeley, Greg.Beeley@LightSys.org. Modified by Steve Smith,
* Steve.Smith@Juno.Com. Alignment bug fix Neil Newell (nn@icenoir.net).
*
* This program Copyright (C) 1999 LightSys Technology Services, Inc.
* Portions Copyright (C) 1999 Steve Smith
*
* This program may be re-distributed in source or binary form, modified,
* sold, or copied for any purpose, provided that the above copyright message
* and this text are included with all source copies or derivative works, and
* provided that the above copyright message and this text are included in the
* documentation of any binary-only distributions. This program is distributed
* WITHOUT ANY WARRANTY, without even the warranty of FITNESS FOR A PARTICULAR
* PURPOSE or MERCHANTABILITY. Please read the associated documentation
* "3c90x.txt" before compiling and using this driver.
*
* --------
*
* Program written with the assistance of the 3com documentation for
* the 3c905B-TX card, as well as with some assistance from the 3c59x
* driver Donald Becker wrote for the Linux kernel, and with some assistance
* from the remainder of the Etherboot distribution.
*
* REVISION HISTORY:
*
* v0.10 1-26-1998 GRB Initial implementation.
* v0.90 1-27-1998 GRB System works.
* v1.00pre1 2-11-1998 GRB Got prom boot issue fixed.
* v2.0 9-24-1999 SCS Modified for 3c905 (from 3c905b code)
* Re-wrote poll and transmit for
* better error recovery and heavy
* network traffic operation
* v2.01 5-26-2003 NN Fixed driver alignment issue which
* caused system lockups if driver structures
* not 8-byte aligned.
*
*/
#include "etherboot.h"
#include "nic.h"
#include "pci.h"
#include "timer.h"
#define XCVR_MAGIC (0x5A00)
/** any single transmission fails after 16 collisions or other errors
** this is the number of times to retry the transmission -- this should
** be plenty
**/
#define XMIT_RETRIES 250
/*** Register definitions for the 3c905 ***/
enum Registers
{
regPowerMgmtCtrl_w = 0x7c, /** 905B Revision Only **/
regUpMaxBurst_w = 0x7a, /** 905B Revision Only **/
regDnMaxBurst_w = 0x78, /** 905B Revision Only **/
regDebugControl_w = 0x74, /** 905B Revision Only **/
regDebugData_l = 0x70, /** 905B Revision Only **/
regRealTimeCnt_l = 0x40, /** Universal **/
regUpBurstThresh_b = 0x3e, /** 905B Revision Only **/
regUpPoll_b = 0x3d, /** 905B Revision Only **/
regUpPriorityThresh_b = 0x3c, /** 905B Revision Only **/
regUpListPtr_l = 0x38, /** Universal **/
regCountdown_w = 0x36, /** Universal **/
regFreeTimer_w = 0x34, /** Universal **/
regUpPktStatus_l = 0x30, /** Universal with Exception, pg 130 **/
regTxFreeThresh_b = 0x2f, /** 90X Revision Only **/
regDnPoll_b = 0x2d, /** 905B Revision Only **/
regDnPriorityThresh_b = 0x2c, /** 905B Revision Only **/
regDnBurstThresh_b = 0x2a, /** 905B Revision Only **/
regDnListPtr_l = 0x24, /** Universal with Exception, pg 107 **/
regDmaCtrl_l = 0x20, /** Universal with Exception, pg 106 **/
/** **/
regIntStatusAuto_w = 0x1e, /** 905B Revision Only **/
regTxStatus_b = 0x1b, /** Universal with Exception, pg 113 **/
regTimer_b = 0x1a, /** Universal **/
regTxPktId_b = 0x18, /** 905B Revision Only **/
regCommandIntStatus_w = 0x0e, /** Universal (Command Variations) **/
};
/** following are windowed registers **/
enum Registers7
{
regPowerMgmtEvent_7_w = 0x0c, /** 905B Revision Only **/
regVlanEtherType_7_w = 0x04, /** 905B Revision Only **/
regVlanMask_7_w = 0x00, /** 905B Revision Only **/
};
enum Registers6
{
regBytesXmittedOk_6_w = 0x0c, /** Universal **/
regBytesRcvdOk_6_w = 0x0a, /** Universal **/
regUpperFramesOk_6_b = 0x09, /** Universal **/
regFramesDeferred_6_b = 0x08, /** Universal **/
regFramesRecdOk_6_b = 0x07, /** Universal with Exceptions, pg 142 **/
regFramesXmittedOk_6_b = 0x06, /** Universal **/
regRxOverruns_6_b = 0x05, /** Universal **/
regLateCollisions_6_b = 0x04, /** Universal **/
regSingleCollisions_6_b = 0x03, /** Universal **/
regMultipleCollisions_6_b = 0x02, /** Universal **/
regSqeErrors_6_b = 0x01, /** Universal **/
regCarrierLost_6_b = 0x00, /** Universal **/
};
enum Registers5
{
regIndicationEnable_5_w = 0x0c, /** Universal **/
regInterruptEnable_5_w = 0x0a, /** Universal **/
regTxReclaimThresh_5_b = 0x09, /** 905B Revision Only **/
regRxFilter_5_b = 0x08, /** Universal **/
regRxEarlyThresh_5_w = 0x06, /** Universal **/
regTxStartThresh_5_w = 0x00, /** Universal **/
};
enum Registers4
{
regUpperBytesOk_4_b = 0x0d, /** Universal **/
regBadSSD_4_b = 0x0c, /** Universal **/
regMediaStatus_4_w = 0x0a, /** Universal with Exceptions, pg 201 **/
regPhysicalMgmt_4_w = 0x08, /** Universal **/
regNetworkDiagnostic_4_w = 0x06, /** Universal with Exceptions, pg 203 **/
regFifoDiagnostic_4_w = 0x04, /** Universal with Exceptions, pg 196 **/
regVcoDiagnostic_4_w = 0x02, /** Undocumented? **/
};
enum Registers3
{
regTxFree_3_w = 0x0c, /** Universal **/
regRxFree_3_w = 0x0a, /** Universal with Exceptions, pg 125 **/
regResetMediaOptions_3_w = 0x08, /** Media Options on B Revision, **/
/** Reset Options on Non-B Revision **/
regMacControl_3_w = 0x06, /** Universal with Exceptions, pg 199 **/
regMaxPktSize_3_w = 0x04, /** 905B Revision Only **/
regInternalConfig_3_l = 0x00, /** Universal, different bit **/
/** definitions, pg 59 **/
};
enum Registers2
{
regResetOptions_2_w = 0x0c, /** 905B Revision Only **/
regStationMask_2_3w = 0x06, /** Universal with Exceptions, pg 127 **/
regStationAddress_2_3w = 0x00, /** Universal with Exceptions, pg 127 **/
};
enum Registers1
{
regRxStatus_1_w = 0x0a, /** 90X Revision Only, Pg 126 **/
};
enum Registers0
{
regEepromData_0_w = 0x0c, /** Universal **/
regEepromCommand_0_w = 0x0a, /** Universal **/
regBiosRomData_0_b = 0x08, /** 905B Revision Only **/
regBiosRomAddr_0_l = 0x04, /** 905B Revision Only **/
};
/*** The names for the eight register windows ***/
enum Windows
{
winPowerVlan7 = 0x07,
winStatistics6 = 0x06,
winTxRxControl5 = 0x05,
winDiagnostics4 = 0x04,
winTxRxOptions3 = 0x03,
winAddressing2 = 0x02,
winUnused1 = 0x01,
winEepromBios0 = 0x00,
};
/*** Command definitions for the 3c90X ***/
enum Commands
{
cmdGlobalReset = 0x00, /** Universal with Exceptions, pg 151 **/
cmdSelectRegisterWindow = 0x01, /** Universal **/
cmdEnableDcConverter = 0x02, /** **/
cmdRxDisable = 0x03, /** **/
cmdRxEnable = 0x04, /** Universal **/
cmdRxReset = 0x05, /** Universal **/
cmdStallCtl = 0x06, /** Universal **/
cmdTxEnable = 0x09, /** Universal **/
cmdTxDisable = 0x0A, /** **/
cmdTxReset = 0x0B, /** Universal **/
cmdRequestInterrupt = 0x0C, /** **/
cmdAcknowledgeInterrupt = 0x0D, /** Universal **/
cmdSetInterruptEnable = 0x0E, /** Universal **/
cmdSetIndicationEnable = 0x0F, /** Universal **/
cmdSetRxFilter = 0x10, /** Universal **/
cmdSetRxEarlyThresh = 0x11, /** **/
cmdSetTxStartThresh = 0x13, /** **/
cmdStatisticsEnable = 0x15, /** **/
cmdStatisticsDisable = 0x16, /** **/
cmdDisableDcConverter = 0x17, /** **/
cmdSetTxReclaimThresh = 0x18, /** **/
cmdSetHashFilterBit = 0x19, /** **/
};
/*** Values for int status register bitmask **/
#define INT_INTERRUPTLATCH (1<<0)
#define INT_HOSTERROR (1<<1)
#define INT_TXCOMPLETE (1<<2)
#define INT_RXCOMPLETE (1<<4)
#define INT_RXEARLY (1<<5)
#define INT_INTREQUESTED (1<<6)
#define INT_UPDATESTATS (1<<7)
#define INT_LINKEVENT (1<<8)
#define INT_DNCOMPLETE (1<<9)
#define INT_UPCOMPLETE (1<<10)
#define INT_CMDINPROGRESS (1<<12)
#define INT_WINDOWNUMBER (7<<13)
/*** TX descriptor ***/
typedef struct
{
unsigned int DnNextPtr;
unsigned int FrameStartHeader;
unsigned int HdrAddr;
unsigned int HdrLength;
unsigned int DataAddr;
unsigned int DataLength;
}
TXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
/*** RX descriptor ***/
typedef struct
{
unsigned int UpNextPtr;
unsigned int UpPktStatus;
unsigned int DataAddr;
unsigned int DataLength;
}
RXD __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
/*** Global variables ***/
static struct
{
unsigned char isBrev;
unsigned char CurrentWindow;
unsigned int IOAddr;
unsigned char HWAddr[ETH_ALEN];
TXD TransmitDPD;
RXD ReceiveUPD;
}
INF_3C90X;
/*** a3c90x_internal_IssueCommand: sends a command to the 3c90x card
***/
static int
a3c90x_internal_IssueCommand(int ioaddr, int cmd, int param)
{
unsigned int val;
/** Build the cmd. **/
val = cmd;
val <<= 11;
val |= param;
/** Send the cmd to the cmd register **/
outw(val, ioaddr + regCommandIntStatus_w);
/** Wait for the cmd to complete, if necessary **/
while (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
return 0;
}
/*** a3c90x_internal_SetWindow: selects a register window set.
***/
static int
a3c90x_internal_SetWindow(int ioaddr, int window)
{
/** Window already as set? **/
if (INF_3C90X.CurrentWindow == window) return 0;
/** Issue the window command. **/
a3c90x_internal_IssueCommand(ioaddr, cmdSelectRegisterWindow, window);
INF_3C90X.CurrentWindow = window;
return 0;
}
/*** a3c90x_internal_ReadEeprom - read data from the serial eeprom.
***/
static unsigned short
a3c90x_internal_ReadEeprom(int ioaddr, int address)
{
unsigned short val;
/** Select correct window **/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winEepromBios0);
/** Make sure the eeprom isn't busy **/
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
/** Read the value. **/
outw(address + ((0x02)<<6), ioaddr + regEepromCommand_0_w);
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
val = inw(ioaddr + regEepromData_0_w);
return val;
}
#if 0
/*** a3c90x_internal_WriteEepromWord - write a physical word of
*** data to the onboard serial eeprom (not the BIOS prom, but the
*** nvram in the card that stores, among other things, the MAC
*** address).
***/
static int
a3c90x_internal_WriteEepromWord(int ioaddr, int address, unsigned short value)
{
/** Select register window **/
a3c90x_internal_SetWindow(ioaddr, winEepromBios0);
/** Verify Eeprom not busy **/
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
/** Issue WriteEnable, and wait for completion. **/
outw(0x30, ioaddr + regEepromCommand_0_w);
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
/** Issue EraseRegister, and wait for completion. **/
outw(address + ((0x03)<<6), ioaddr + regEepromCommand_0_w);
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
/** Send the new data to the eeprom, and wait for completion. **/
outw(value, ioaddr + regEepromData_0_w);
outw(0x30, ioaddr + regEepromCommand_0_w);
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
/** Burn the new data into the eeprom, and wait for completion. **/
outw(address + ((0x01)<<6), ioaddr + regEepromCommand_0_w);
while((1<<15) & inw(ioaddr + regEepromCommand_0_w));
return 0;
}
#endif
#if 0
/*** a3c90x_internal_WriteEeprom - write data to the serial eeprom,
*** and re-compute the eeprom checksum.
***/
static int
a3c90x_internal_WriteEeprom(int ioaddr, int address, unsigned short value)
{
int cksum = 0,v;
int i;
int maxAddress, cksumAddress;
if (INF_3C90X.isBrev)
{
maxAddress=0x1f;
cksumAddress=0x20;
}
else
{
maxAddress=0x16;
cksumAddress=0x17;
}
/** Write the value. **/
if (a3c90x_internal_WriteEepromWord(ioaddr, address, value) == -1)
return -1;
/** Recompute the checksum. **/
for(i=0;i<=maxAddress;i++)
{
v = a3c90x_internal_ReadEeprom(ioaddr, i);
cksum ^= (v & 0xFF);
cksum ^= ((v>>8) & 0xFF);
}
/** Write the checksum to the location in the eeprom **/
if (a3c90x_internal_WriteEepromWord(ioaddr, cksumAddress, cksum) == -1)
return -1;
return 0;
}
#endif
/*** a3c90x_reset: exported function that resets the card to its default
*** state. This is so the Linux driver can re-set the card up the way
*** it wants to. If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
*** not alter the selected transceiver that we used to download the boot
*** image.
***/
static void a3c90x_reset(void)
{
#ifdef CFG_3C90X_PRESERVE_XCVR
int cfg;
/** Read the current InternalConfig value. **/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
#endif
/** Send the reset command to the card **/
printf("Issuing RESET:\n");
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdGlobalReset, 0);
/** wait for reset command to complete **/
while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
/** global reset command resets station mask, non-B revision cards
** require explicit reset of values
**/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
#ifdef CFG_3C90X_PRESERVE_XCVR
/** Re-set the original InternalConfig value from before reset **/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
/** enable DC converter for 10-Base-T **/
if ((cfg&0x0300) == 0x0300)
{
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
}
#endif
/** Issue transmit reset, wait for command completion **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0);
while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
;
if (! INF_3C90X.isBrev)
outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
/**
** reset of the receiver on B-revision cards re-negotiates the link
** takes several seconds (a computer eternity)
**/
if (INF_3C90X.isBrev)
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
else
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS);
;
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
cmdSetInterruptEnable, 0);
/** enable rxComplete and txComplete **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
cmdSetIndicationEnable, 0x0014);
/** acknowledge any pending status flags **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
cmdAcknowledgeInterrupt, 0x661);
return;
}
/*** a3c90x_transmit: exported function that transmits a packet. Does not
*** return any particular status. Parameters are:
*** d[6] - destination address, ethernet;
*** t - protocol type (ARP, IP, etc);
*** s - size of the non-header part of the packet that needs transmitted;
*** p - the pointer to the packet data itself.
***/
static void
a3c90x_transmit(struct nic *nic __unused, const char *d, unsigned int t,
unsigned int s, const char *p)
{
struct eth_hdr
{
unsigned char dst_addr[ETH_ALEN];
unsigned char src_addr[ETH_ALEN];
unsigned short type;
} hdr;
unsigned char status;
unsigned i, retries;
for (retries=0; retries < XMIT_RETRIES ; retries++)
{
/** Stall the download engine **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 2);
/** Make sure the card is not waiting on us **/
inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
inw(INF_3C90X.IOAddr + regCommandIntStatus_w);
while (inw(INF_3C90X.IOAddr+regCommandIntStatus_w) &
INT_CMDINPROGRESS)
;
/** Set the ethernet packet type **/
hdr.type = htons(t);
/** Copy the destination address **/
memcpy(hdr.dst_addr, d, ETH_ALEN);
/** Copy our MAC address **/
memcpy(hdr.src_addr, INF_3C90X.HWAddr, ETH_ALEN);
/** Setup the DPD (download descriptor) **/
INF_3C90X.TransmitDPD.DnNextPtr = 0;
/** set notification for transmission completion (bit 15) **/
INF_3C90X.TransmitDPD.FrameStartHeader = (s + sizeof(hdr)) | 0x8000;
INF_3C90X.TransmitDPD.HdrAddr = virt_to_bus(&hdr);
INF_3C90X.TransmitDPD.HdrLength = sizeof(hdr);
INF_3C90X.TransmitDPD.DataAddr = virt_to_bus(p);
INF_3C90X.TransmitDPD.DataLength = s + (1<<31);
/** Send the packet **/
outl(virt_to_bus(&(INF_3C90X.TransmitDPD)),
INF_3C90X.IOAddr + regDnListPtr_l);
/** End Stall and Wait for upload to complete. **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdStallCtl, 3);
while(inl(INF_3C90X.IOAddr + regDnListPtr_l) != 0)
;
/** Wait for NIC Transmit to Complete **/
load_timer2(10*TICKS_PER_MS); /* Give it 10 ms */
while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004) &&
timer2_running())
;
if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004))
{
printf("3C90X: Tx Timeout\n");
continue;
}
status = inb(INF_3C90X.IOAddr + regTxStatus_b);
/** acknowledge transmit interrupt by writing status **/
outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
/** successful completion (sans "interrupt Requested" bit) **/
if ((status & 0xbf) == 0x80)
return;
printf("3C90X: Status (%hhX)\n", status);
/** check error codes **/
if (status & 0x02)
{
printf("3C90X: Tx Reclaim Error (%hhX)\n", status);
a3c90x_reset();
}
else if (status & 0x04)
{
printf("3C90X: Tx Status Overflow (%hhX)\n", status);
for (i=0; i<32; i++)
outb(0x00, INF_3C90X.IOAddr + regTxStatus_b);
/** must re-enable after max collisions before re-issuing tx **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
}
else if (status & 0x08)
{
printf("3C90X: Tx Max Collisions (%hhX)\n", status);
/** must re-enable after max collisions before re-issuing tx **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
}
else if (status & 0x10)
{
printf("3C90X: Tx Underrun (%hhX)\n", status);
a3c90x_reset();
}
else if (status & 0x20)
{
printf("3C90X: Tx Jabber (%hhX)\n", status);
a3c90x_reset();
}
else if ((status & 0x80) != 0x80)
{
printf("3C90X: Internal Error - Incomplete Transmission (%hhX)\n",
status);
a3c90x_reset();
}
}
/** failed after RETRY attempts **/
printf("Failed to send after %d retries\n", retries);
return;
}
/*** a3c90x_poll: exported routine that waits for a certain length of time
*** for a packet, and if it sees none, returns 0. This routine should
*** copy the packet to nic->packet if it gets a packet and set the size
*** in nic->packetlen. Return 1 if a packet was found.
***/
static int
a3c90x_poll(struct nic *nic, int retrieve)
{
int i, errcode;
if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010))
{
return 0;
}
if ( ! retrieve ) return 1;
/** we don't need to acknowledge rxComplete -- the upload engine
** does it for us.
**/
/** Build the up-load descriptor **/
INF_3C90X.ReceiveUPD.UpNextPtr = 0;
INF_3C90X.ReceiveUPD.UpPktStatus = 0;
INF_3C90X.ReceiveUPD.DataAddr = virt_to_bus(nic->packet);
INF_3C90X.ReceiveUPD.DataLength = 1536 + (1<<31);
/** Submit the upload descriptor to the NIC **/
outl(virt_to_bus(&(INF_3C90X.ReceiveUPD)),
INF_3C90X.IOAddr + regUpListPtr_l);
/** Wait for upload completion (upComplete(15) or upError (14)) **/
for(i=0;i<40000;i++);
while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
for(i=0;i<40000;i++);
/** Check for Error (else we have good packet) **/
if (INF_3C90X.ReceiveUPD.UpPktStatus & (1<<14))
{
errcode = INF_3C90X.ReceiveUPD.UpPktStatus;
if (errcode & (1<<16))
printf("3C90X: Rx Overrun (%hX)\n",errcode>>16);
else if (errcode & (1<<17))
printf("3C90X: Runt Frame (%hX)\n",errcode>>16);
else if (errcode & (1<<18))
printf("3C90X: Alignment Error (%hX)\n",errcode>>16);
else if (errcode & (1<<19))
printf("3C90X: CRC Error (%hX)\n",errcode>>16);
else if (errcode & (1<<20))
printf("3C90X: Oversized Frame (%hX)\n",errcode>>16);
else
printf("3C90X: Packet error (%hX)\n",errcode>>16);
return 0;
}
/** Ok, got packet. Set length in nic->packetlen. **/
nic->packetlen = (INF_3C90X.ReceiveUPD.UpPktStatus & 0x1FFF);
return 1;
}
/*** a3c90x_disable: exported routine to disable the card. What's this for?
*** the eepro100.c driver didn't have one, so I just left this one empty too.
*** Ideas anyone?
*** Must turn off receiver at least so stray packets will not corrupt memory
*** [Ken]
***/
static void
a3c90x_disable(struct dev *dev __unused)
{
/* reset and disable merge */
a3c90x_reset();
/* Disable the receiver and transmitter. */
outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w);
}
static void a3c90x_irq(struct nic *nic __unused, irq_action_t action __unused)
{
switch ( action ) {
case DISABLE :
break;
case ENABLE :
break;
case FORCE :
break;
}
}
/*** a3c90x_probe: exported routine to probe for the 3c905 card and perform
*** initialization. If this routine is called, the pci functions did find the
*** card. We just have to init it here.
***/
static int a3c90x_probe(struct dev *dev, struct pci_device *pci)
{
struct nic *nic = (struct nic *)dev;
int i, c;
unsigned short eeprom[0x21];
unsigned int cfg;
unsigned int mopt;
unsigned int mstat;
unsigned short linktype;
#define HWADDR_OFFSET 10
if (pci->ioaddr == 0)
return 0;
adjust_pci_device(pci);
nic->ioaddr = pci->ioaddr & ~3;
nic->irqno = 0;
INF_3C90X.IOAddr = pci->ioaddr & ~3;
INF_3C90X.CurrentWindow = 255;
switch (a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, 0x03))
{
case 0x9000: /** 10 Base TPO **/
case 0x9001: /** 10/100 T4 **/
case 0x9050: /** 10/100 TPO **/
case 0x9051: /** 10 Base Combo **/
INF_3C90X.isBrev = 0;
break;
case 0x9004: /** 10 Base TPO **/
case 0x9005: /** 10 Base Combo **/
case 0x9006: /** 10 Base TPO and Base2 **/
case 0x900A: /** 10 Base FL **/
case 0x9055: /** 10/100 TPO **/
case 0x9056: /** 10/100 T4 **/
case 0x905A: /** 10 Base FX **/
default:
INF_3C90X.isBrev = 1;
break;
}
/** Load the EEPROM contents **/
if (INF_3C90X.isBrev)
{
for(i=0;i<=0x20;i++)
{
eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
}
#ifdef CFG_3C90X_BOOTROM_FIX
/** Set xcvrSelect in InternalConfig in eeprom. **/
/* only necessary for 3c905b revision cards with boot PROM bug!!! */
a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x13, 0x0160);
#endif
#ifdef CFG_3C90X_XCVR
if (CFG_3C90X_XCVR == 255)
{
/** Clear the LanWorks register **/
a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16, 0);
}
else
{
/** Set the selected permanent-xcvrSelect in the
** LanWorks register
**/
a3c90x_internal_WriteEeprom(INF_3C90X.IOAddr, 0x16,
XCVR_MAGIC + ((CFG_3C90X_XCVR) & 0x000F));
}
#endif
}
else
{
for(i=0;i<=0x17;i++)
{
eeprom[i] = a3c90x_internal_ReadEeprom(INF_3C90X.IOAddr, i);
}
}
/** Print identification message **/
printf("\n\n3C90X Driver 2.00 "
"Copyright 1999 LightSys Technology Services, Inc.\n"
"Portions Copyright 1999 Steve Smith\n");
printf("Provided with ABSOLUTELY NO WARRANTY.\n");
#ifdef CFG_3C90X_BOOTROM_FIX
if (INF_3C90X.isBrev)
{
printf("NOTE: 3c905b bootrom fix enabled; has side "
"effects. See 3c90x.txt for info.\n");
}
#endif
printf("-------------------------------------------------------"
"------------------------\n");
/** Retrieve the Hardware address and print it on the screen. **/
INF_3C90X.HWAddr[0] = eeprom[HWADDR_OFFSET + 0]>>8;
INF_3C90X.HWAddr[1] = eeprom[HWADDR_OFFSET + 0]&0xFF;
INF_3C90X.HWAddr[2] = eeprom[HWADDR_OFFSET + 1]>>8;
INF_3C90X.HWAddr[3] = eeprom[HWADDR_OFFSET + 1]&0xFF;
INF_3C90X.HWAddr[4] = eeprom[HWADDR_OFFSET + 2]>>8;
INF_3C90X.HWAddr[5] = eeprom[HWADDR_OFFSET + 2]&0xFF;
printf("MAC Address = %!\n", INF_3C90X.HWAddr);
/* Test if the link is good, if not continue */
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winDiagnostics4);
mstat = inw(INF_3C90X.IOAddr + regMediaStatus_4_w);
if((mstat & (1<<11)) == 0) {
printf("Valid link not established\n");
return 0;
}
/** Program the MAC address into the station address registers **/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
outw(htons(eeprom[HWADDR_OFFSET + 0]), INF_3C90X.IOAddr + regStationAddress_2_3w);
outw(htons(eeprom[HWADDR_OFFSET + 1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2);
outw(htons(eeprom[HWADDR_OFFSET + 2]), INF_3C90X.IOAddr + regStationAddress_2_3w+4);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+0);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+2);
outw(0, INF_3C90X.IOAddr + regStationMask_2_3w+4);
/** Fill in our entry in the etherboot arp table **/
for(i=0;i<ETH_ALEN;i++)
nic->node_addr[i] = (eeprom[HWADDR_OFFSET + i/2] >> (8*((i&1)^1))) & 0xff;
/** Read the media options register, print a message and set default
** xcvr.
**
** Uses Media Option command on B revision, Reset Option on non-B
** revision cards -- same register address
**/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
mopt = inw(INF_3C90X.IOAddr + regResetMediaOptions_3_w);
/** mask out VCO bit that is defined as 10baseFL bit on B-rev cards **/
if (! INF_3C90X.isBrev)
{
mopt &= 0x7F;
}
printf("Connectors present: ");
c = 0;
linktype = 0x0008;
if (mopt & 0x01)
{
printf("%s100Base-T4",(c++)?", ":"");
linktype = 0x0006;
}
if (mopt & 0x04)
{
printf("%s100Base-FX",(c++)?", ":"");
linktype = 0x0005;
}
if (mopt & 0x10)
{
printf("%s10Base-2",(c++)?", ":"");
linktype = 0x0003;
}
if (mopt & 0x20)
{
printf("%sAUI",(c++)?", ":"");
linktype = 0x0001;
}
if (mopt & 0x40)
{
printf("%sMII",(c++)?", ":"");
linktype = 0x0006;
}
if ((mopt & 0xA) == 0xA)
{
printf("%s10Base-T / 100Base-TX",(c++)?", ":"");
linktype = 0x0008;
}
else if ((mopt & 0xA) == 0x2)
{
printf("%s100Base-TX",(c++)?", ":"");
linktype = 0x0008;
}
else if ((mopt & 0xA) == 0x8)
{
printf("%s10Base-T",(c++)?", ":"");
linktype = 0x0008;
}
printf(".\n");
/** Determine transceiver type to use, depending on value stored in
** eeprom 0x16
**/
if (INF_3C90X.isBrev)
{
if ((eeprom[0x16] & 0xFF00) == XCVR_MAGIC)
{
/** User-defined **/
linktype = eeprom[0x16] & 0x000F;
}
}
else
{
#ifdef CFG_3C90X_XCVR
if (CFG_3C90X_XCVR != 255)
linktype = CFG_3C90X_XCVR;
#endif /* CFG_3C90X_XCVR */
/** I don't know what MII MAC only mode is!!! **/
if (linktype == 0x0009)
{
if (INF_3C90X.isBrev)
printf("WARNING: MII External MAC Mode only supported on B-revision "
"cards!!!!\nFalling Back to MII Mode\n");
linktype = 0x0006;
}
}
/** enable DC converter for 10-Base-T **/
if (linktype == 0x0003)
{
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdEnableDcConverter, 0);
}
/** Set the link to the type we just determined. **/
a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winTxRxOptions3);
cfg = inl(INF_3C90X.IOAddr + regInternalConfig_3_l);
cfg &= ~(0xF<<20);
cfg |= (linktype<<20);
outl(cfg, INF_3C90X.IOAddr + regInternalConfig_3_l);
/** Now that we set the xcvr type, reset the Tx and Rx, re-enable. **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxReset, 0x00);
while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
;
if (!INF_3C90X.isBrev)
outb(0x01, INF_3C90X.IOAddr + regTxFreeThresh_b);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdTxEnable, 0);
/**
** reset of the receiver on B-revision cards re-negotiates the link
** takes several seconds (a computer eternity)
**/
if (INF_3C90X.isBrev)
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x04);
else
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxReset, 0x00);
while (inw(INF_3C90X.IOAddr + regCommandIntStatus_w) & INT_CMDINPROGRESS)
;
/** Set the RX filter = receive only individual pkts & multicast & bcast. **/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 0x02 + 0x04);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdRxEnable, 0);
/**
** set Indication and Interrupt flags , acknowledge any IRQ's
**/
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetInterruptEnable, 0);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
cmdSetIndicationEnable, 0x0014);
a3c90x_internal_IssueCommand(INF_3C90X.IOAddr,
cmdAcknowledgeInterrupt, 0x661);
/** Set our exported functions **/
dev->disable = a3c90x_disable;
nic->poll = a3c90x_poll;
nic->transmit = a3c90x_transmit;
nic->irq = a3c90x_irq;
return 1;
}
static struct pci_id a3c90x_nics[] = {
/* Original 90x revisions: */
PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO"), /* 10 Base TPO */
PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo"), /* 10/100 T4 */
PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX"), /* 100 Base TX / 10/100 TPO */
PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4"), /* 100 Base T4 / 10 Base Combo */
/* Newer 90xB revisions: */
PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO"), /* 10 Base TPO */
PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo"), /* 10 Base Combo */
PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T"), /* 10 Base TP and Base2 */
PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL"), /* 10 Base FL */
PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX"), /* 10/100 TPO */
PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4"), /* 10/100 T4 */
PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058"), /* Cyclone 10/100/BNC */
PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL"), /* 100 Base FX / 10 Base FX */
/* Newer 90xC revision: */
PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM"), /* 10/100 TPO (3C905C-TXM) */
PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm","3Com20B-EMB WNM"),
PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone"), /* Cyclone */
PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805"), /* Dual Port Server Cyclone */
PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX"), /* Hurricane */
PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado"),
PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A"),
PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B"),
};
struct pci_driver a3c90x_driver = {
.type = NIC_DRIVER,
.name = "3C90X",
.probe = a3c90x_probe,
.ids = a3c90x_nics,
.id_count = sizeof(a3c90x_nics)/sizeof(a3c90x_nics[0]),
.class = 0,
};