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/*
* 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).
*
* Port from etherboot to gPXE API, implementation of tx/rx ring support
* by Thomas Miletich, thomas.miletich@gmail.com
* Thanks to Marty Connor and Stefan Hajnoczi for their help and feedback.
*
* 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);"
*
*
* indent options: indent -kr -i8 3c90x.c
*/
FILE_LICENCE ( BSD2 );
#ifndef __3C90X_H_
#define __3C90X_H_
static struct net_device_operations a3c90x_operations;
#define XCVR_MAGIC (0x5A00)
/* 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 {
winNone = 0xff,
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, /* */
};
enum FrameStartHeader {
fshTxIndicate = 0x8000,
fshDnComplete = 0x10000,
};
enum UpDownDesc {
upLastFrag = (1 << 31),
downLastFrag = (1 << 31),
};
enum UpPktStatus {
upComplete = (1 << 15),
upError = (1 << 14),
};
enum Stalls {
upStall = 0x00,
upUnStall = 0x01,
dnStall = 0x02,
dnUnStall = 0x03,
};
enum Resources {
resRxRing = 0x00,
resTxRing = 0x02,
resRxIOBuf = 0x04
};
enum eeprom {
eepromBusy = (1 << 15),
eepromRead = ((0x02) << 6),
eepromRead_556 = 0x230,
eepromHwAddrOffset = 0x0a,
};
/* Bit 4 is only used in revison B and upwards */
enum linktype {
link10BaseT = 0x00,
linkAUI = 0x01,
link10Base2 = 0x03,
link100BaseFX = 0x05,
linkMII = 0x06,
linkAutoneg = 0x08,
linkExternalMII = 0x09,
};
/* 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)
/* Buffer sizes */
#define TX_RING_SIZE 8
#define RX_RING_SIZE 8
#define TX_RING_ALIGN 16
#define RX_RING_ALIGN 16
#define RX_BUF_SIZE 1536
/* Timeouts for eeprom and command completion */
/* Timeout 1 second, to be save */
#define EEPROM_TIMEOUT 1 * 1000 * 1000
/* TX descriptor */
struct TXD {
volatile unsigned int DnNextPtr;
volatile unsigned int FrameStartHeader;
volatile unsigned int DataAddr;
volatile unsigned int DataLength;
} __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
/* RX descriptor */
struct RXD {
volatile unsigned int UpNextPtr;
volatile unsigned int UpPktStatus;
volatile unsigned int DataAddr;
volatile unsigned int DataLength;
} __attribute__ ((aligned(8))); /* 64-bit aligned for bus mastering */
/* Private NIC dats */
struct INF_3C90X {
unsigned int is3c556;
unsigned char isBrev;
unsigned char CurrentWindow;
unsigned int IOAddr;
unsigned short eeprom[0x21];
unsigned int tx_cur; /* current entry in tx_ring */
unsigned int tx_cnt; /* current number of used tx descriptors */
unsigned int tx_tail; /* entry of last finished packet */
unsigned int rx_cur;
struct TXD *tx_ring;
struct RXD *rx_ring;
struct io_buffer *tx_iobuf[TX_RING_SIZE];
struct io_buffer *rx_iobuf[RX_RING_SIZE];
struct nvs_device nvs;
};
#endif
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