| /* |
| * 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 |
| * |
| * 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 |
| * |
| */ |
| |
| #include "etherboot.h" |
| #include "nic.h" |
| #include "pci.h" |
| #include "cards.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 |
| |
| #undef virt_to_bus |
| #define virt_to_bus(x) ((unsigned long)x) |
| |
| /*** 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; |
| |
| /*** RX descriptor ***/ |
| typedef struct |
| { |
| unsigned int UpNextPtr; |
| unsigned int UpPktStatus; |
| unsigned int DataAddr; |
| unsigned int DataLength; |
| } |
| RXD; |
| |
| /*** 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; |
| } |
| |
| |
| /*** 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; |
| } |
| |
| |
| /*** 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; |
| } |
| |
| |
| |
| /*** 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(struct nic *nic) |
| { |
| int cfg; |
| |
| #ifdef CFG_3C90X_PRESERVE_XCVR |
| /** 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, 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(NULL); |
| } |
| 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(NULL); |
| } |
| else if (status & 0x20) |
| { |
| printf("3C90X: Tx Jabber (%hhX)\n", status); |
| a3c90x_reset(NULL); |
| } |
| else if ((status & 0x80) != 0x80) |
| { |
| printf("3C90X: Internal Error - Incomplete Transmission (%hhX)\n", |
| status); |
| a3c90x_reset(NULL); |
| } |
| } |
| |
| /** 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 i, errcode; |
| |
| if (!(inw(INF_3C90X.IOAddr + regCommandIntStatus_w)&0x0010)) |
| { |
| return 0; |
| } |
| |
| /** 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 nic *nic) |
| { |
| /* Disable the receiver and transmitter. */ |
| outw(cmdRxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w); |
| outw(cmdTxDisable, INF_3C90X.IOAddr + regCommandIntStatus_w); |
| } |
| |
| |
| |
| /*** 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. |
| ***/ |
| struct nic* |
| a3c90x_probe(struct nic *nic, unsigned short *probeaddrs, struct pci_device *pci) |
| { |
| int i, c; |
| unsigned short eeprom[0x21]; |
| unsigned int cfg; |
| unsigned int mopt; |
| unsigned short linktype; |
| |
| if (probeaddrs == 0 || probeaddrs[0] == 0) |
| return 0; |
| |
| adjust_pci_device(pci); |
| |
| INF_3C90X.IOAddr = probeaddrs[0] & ~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"); |
| printf("-------------------------------------------------------" |
| "------------------------\n"); |
| |
| /** Retrieve the Hardware address and print it on the screen. **/ |
| INF_3C90X.HWAddr[0] = eeprom[0]>>8; |
| INF_3C90X.HWAddr[1] = eeprom[0]&0xFF; |
| INF_3C90X.HWAddr[2] = eeprom[1]>>8; |
| INF_3C90X.HWAddr[3] = eeprom[1]&0xFF; |
| INF_3C90X.HWAddr[4] = eeprom[2]>>8; |
| INF_3C90X.HWAddr[5] = eeprom[2]&0xFF; |
| printf("MAC Address = %!\n", INF_3C90X.HWAddr); |
| |
| /** Program the MAC address into the station address registers **/ |
| a3c90x_internal_SetWindow(INF_3C90X.IOAddr, winAddressing2); |
| outw(htons(eeprom[0]), INF_3C90X.IOAddr + regStationAddress_2_3w); |
| outw(htons(eeprom[1]), INF_3C90X.IOAddr + regStationAddress_2_3w+2); |
| outw(htons(eeprom[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[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 & bcast. **/ |
| a3c90x_internal_IssueCommand(INF_3C90X.IOAddr, cmdSetRxFilter, 0x01 + 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->reset = a3c90x_reset; |
| nic->poll = a3c90x_poll; |
| nic->transmit = a3c90x_transmit; |
| nic->disable = a3c90x_disable; |
| |
| return nic; |
| } |
| |
| |
