aboutsummaryrefslogtreecommitdiffstats
path: root/gpxe/src/drivers/net/3c90x.c
diff options
context:
space:
mode:
authorH. Peter Anvin <hpa@zytor.com>2008-03-26 16:25:35 -0700
committerH. Peter Anvin <hpa@zytor.com>2008-03-26 16:25:35 -0700
commit9eddd22a7b53b1d02fbae0d987df8af122924248 (patch)
tree882f5152880b0b1aa2d7a0619d30065acc69fb16 /gpxe/src/drivers/net/3c90x.c
parentbbb8f15936b851e6a0ef6f7bb2c95197bff35994 (diff)
downloadsyslinux.git-9eddd22a7b53b1d02fbae0d987df8af122924248.tar.gz
syslinux.git-9eddd22a7b53b1d02fbae0d987df8af122924248.tar.xz
syslinux.git-9eddd22a7b53b1d02fbae0d987df8af122924248.zip
Add gPXE into the source tree; build unified imagesyslinux-3.70-pre7
Diffstat (limited to 'gpxe/src/drivers/net/3c90x.c')
-rw-r--r--gpxe/src/drivers/net/3c90x.c1027
1 files changed, 1027 insertions, 0 deletions
diff --git a/gpxe/src/drivers/net/3c90x.c b/gpxe/src/drivers/net/3c90x.c
new file mode 100644
index 00000000..8158239d
--- /dev/null
+++ b/gpxe/src/drivers/net/3c90x.c
@@ -0,0 +1,1027 @@
+/*
+ * 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.
+ * v2.02 11-28-2007 GSt Got polling working again by replacing
+ * "for(i=0;i<40000;i++);" with "mdelay(1);"
+ *
+ */
+
+#include "etherboot.h"
+#include "nic.h"
+#include <gpxe/pci.h>
+#include <gpxe/ethernet.h>
+
+static struct nic_operations a3c90x_operations;
+
+#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 int is3c556;
+ 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. **/
+ if (INF_3C90X.is3c556)
+ {
+ outw(address + (0x230), ioaddr + regEepromCommand_0_w);
+ }
+ else
+ {
+ 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;
+ tick_t ct;
+
+ 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 **/
+ ct = currticks();
+
+ while (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0004) &&
+ ct + 10*USECS_IN_MSEC < currticks());
+ ;
+
+ 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 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)) **/
+ mdelay(1);
+ while((INF_3C90X.ReceiveUPD.UpPktStatus & ((1<<14) | (1<<15))) == 0)
+ mdelay(1);
+
+ /** 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 nic *nic __unused ) {
+ 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 nic *nic, struct pci_device *pci ) {
+
+ 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;
+ nic->irqno = 0;
+
+ INF_3C90X.is3c556 = (pci->device == 0x6055);
+ 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 2.02 "
+ "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;
+
+ DBG ( "MAC Address = %s\n", eth_ntoa ( INF_3C90X.HWAddr ) );
+
+ /** 3C556: Invert MII power **/
+ if (INF_3C90X.is3c556) {
+ unsigned int tmp;
+ a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2);
+ tmp = inw(INF_3C90X.IOAddr + regResetOptions_2_w);
+ tmp |= 0x4000;
+ outw(tmp, INF_3C90X.IOAddr + regResetOptions_2_w);
+ }
+
+ /* 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 **/
+ nic->nic_op = &a3c90x_operations;
+ return 1;
+}
+
+static struct nic_operations a3c90x_operations = {
+ .connect = dummy_connect,
+ .poll = a3c90x_poll,
+ .transmit = a3c90x_transmit,
+ .irq = a3c90x_irq,
+
+};
+
+static struct pci_device_id a3c90x_nics[] = {
+/* Original 90x revisions: */
+PCI_ROM(0x10b7, 0x6055, "3c556", "3C556"), /* Huricane */
+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, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)"), /* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
+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"),
+};
+
+PCI_DRIVER ( a3c90x_driver, a3c90x_nics, PCI_NO_CLASS );
+
+DRIVER ( "3C90X", nic_driver, pci_driver, a3c90x_driver,
+ a3c90x_probe, a3c90x_disable );
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * c-indent-level: 8
+ * tab-width: 8
+ * End:
+ */