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Diffstat (limited to 'drivers/net/3c523.h')
| -rw-r--r-- | drivers/net/3c523.h | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/drivers/net/3c523.h b/drivers/net/3c523.h new file mode 100644 index 0000000..7292f88 --- /dev/null +++ b/drivers/net/3c523.h @@ -0,0 +1,355 @@ +#ifndef _3c523_INCLUDE_ +#define _3c523_INCLUDE_ +/* + This is basically a hacked version of ni52.h, for the 3c523 + Etherlink/MC. +*/ + +/* + * Intel i82586 Ethernet definitions + * + * This is an extension to the Linux operating system, and is covered by the + * same GNU General Public License that covers that work. + * + * Copyright 1995 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca) + * + * See 3c523.c for details. + * + * $Header: /home/chrisb/linux-1.2.13-3c523/drivers/net/RCS/3c523.h,v 1.6 1996/01/20 05:09:00 chrisb Exp chrisb $ + */ + +/* + * where to find the System Configuration Pointer (SCP) + */ +#define SCP_DEFAULT_ADDRESS 0xfffff4 + + +/* + * System Configuration Pointer Struct + */ + +struct scp_struct +{ + unsigned short zero_dum0; /* has to be zero */ + unsigned char sysbus; /* 0=16Bit,1=8Bit */ + unsigned char zero_dum1; /* has to be zero for 586 */ + unsigned short zero_dum2; + unsigned short zero_dum3; + char *iscp; /* pointer to the iscp-block */ +}; + + +/* + * Intermediate System Configuration Pointer (ISCP) + */ +struct iscp_struct +{ + unsigned char busy; /* 586 clears after successful init */ + unsigned char zero_dummy; /* hast to be zero */ + unsigned short scb_offset; /* pointeroffset to the scb_base */ + char *scb_base; /* base-address of all 16-bit offsets */ +}; + +/* + * System Control Block (SCB) + */ +struct scb_struct +{ + unsigned short status; /* status word */ + unsigned short cmd; /* command word */ + unsigned short cbl_offset; /* pointeroffset, command block list */ + unsigned short rfa_offset; /* pointeroffset, receive frame area */ + unsigned short crc_errs; /* CRC-Error counter */ + unsigned short aln_errs; /* alignmenterror counter */ + unsigned short rsc_errs; /* Resourceerror counter */ + unsigned short ovrn_errs; /* OVerrunerror counter */ +}; + +/* + * possible command values for the command word + */ +#define RUC_MASK 0x0070 /* mask for RU commands */ +#define RUC_NOP 0x0000 /* NOP-command */ +#define RUC_START 0x0010 /* start RU */ +#define RUC_RESUME 0x0020 /* resume RU after suspend */ +#define RUC_SUSPEND 0x0030 /* suspend RU */ +#define RUC_ABORT 0x0040 /* abort receiver operation immediately */ + +#define CUC_MASK 0x0700 /* mask for CU command */ +#define CUC_NOP 0x0000 /* NOP-command */ +#define CUC_START 0x0100 /* start execution of 1. cmd on the CBL */ +#define CUC_RESUME 0x0200 /* resume after suspend */ +#define CUC_SUSPEND 0x0300 /* Suspend CU */ +#define CUC_ABORT 0x0400 /* abort command operation immediately */ + +#define ACK_MASK 0xf000 /* mask for ACK command */ +#define ACK_CX 0x8000 /* acknowledges STAT_CX */ +#define ACK_FR 0x4000 /* ack. STAT_FR */ +#define ACK_CNA 0x2000 /* ack. STAT_CNA */ +#define ACK_RNR 0x1000 /* ack. STAT_RNR */ + +/* + * possible status values for the status word + */ +#define STAT_MASK 0xf000 /* mask for cause of interrupt */ +#define STAT_CX 0x8000 /* CU finished cmd with its I bit set */ +#define STAT_FR 0x4000 /* RU finished receiving a frame */ +#define STAT_CNA 0x2000 /* CU left active state */ +#define STAT_RNR 0x1000 /* RU left ready state */ + +#define CU_STATUS 0x700 /* CU status, 0=idle */ +#define CU_SUSPEND 0x100 /* CU is suspended */ +#define CU_ACTIVE 0x200 /* CU is active */ + +#define RU_STATUS 0x70 /* RU status, 0=idle */ +#define RU_SUSPEND 0x10 /* RU suspended */ +#define RU_NOSPACE 0x20 /* RU no resources */ +#define RU_READY 0x40 /* RU is ready */ + +/* + * Receive Frame Descriptor (RFD) + */ +struct rfd_struct +{ + unsigned short status; /* status word */ + unsigned short last; /* Bit15,Last Frame on List / Bit14,suspend */ + unsigned short next; /* linkoffset to next RFD */ + unsigned short rbd_offset; /* pointeroffset to RBD-buffer */ + unsigned char dest[6]; /* ethernet-address, destination */ + unsigned char source[6]; /* ethernet-address, source */ + unsigned short length; /* 802.3 frame-length */ + unsigned short zero_dummy; /* dummy */ +}; + +#define RFD_LAST 0x8000 /* last: last rfd in the list */ +#define RFD_SUSP 0x4000 /* last: suspend RU after */ +#define RFD_ERRMASK 0x0fe1 /* status: errormask */ +#define RFD_MATCHADD 0x0002 /* status: Destinationaddress !matches IA */ +#define RFD_RNR 0x0200 /* status: receiver out of resources */ + +/* + * Receive Buffer Descriptor (RBD) + */ +struct rbd_struct +{ + unsigned short status; /* status word,number of used bytes in buff */ + unsigned short next; /* pointeroffset to next RBD */ + char *buffer; /* receive buffer address pointer */ + unsigned short size; /* size of this buffer */ + unsigned short zero_dummy; /* dummy */ +}; + +#define RBD_LAST 0x8000 /* last buffer */ +#define RBD_USED 0x4000 /* this buffer has data */ +#define RBD_MASK 0x3fff /* size-mask for length */ + +/* + * Statusvalues for Commands/RFD + */ +#define STAT_COMPL 0x8000 /* status: frame/command is complete */ +#define STAT_BUSY 0x4000 /* status: frame/command is busy */ +#define STAT_OK 0x2000 /* status: frame/command is ok */ + +/* + * Action-Commands + */ +#define CMD_NOP 0x0000 /* NOP */ +#define CMD_IASETUP 0x0001 /* initial address setup command */ +#define CMD_CONFIGURE 0x0002 /* configure command */ +#define CMD_MCSETUP 0x0003 /* MC setup command */ +#define CMD_XMIT 0x0004 /* transmit command */ +#define CMD_TDR 0x0005 /* time domain reflectometer (TDR) command */ +#define CMD_DUMP 0x0006 /* dump command */ +#define CMD_DIAGNOSE 0x0007 /* diagnose command */ + +/* + * Action command bits + */ +#define CMD_LAST 0x8000 /* indicates last command in the CBL */ +#define CMD_SUSPEND 0x4000 /* suspend CU after this CB */ +#define CMD_INT 0x2000 /* generate interrupt after execution */ + +/* + * NOP - command + */ +struct nop_cmd_struct +{ + unsigned short cmd_status; /* status of this command */ + unsigned short cmd_cmd; /* the command itself (+bits) */ + unsigned short cmd_link; /* offsetpointer to next command */ +}; + +/* + * IA Setup command + */ +struct iasetup_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned char iaddr[6]; +}; + +/* + * Configure command + */ +struct configure_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned char byte_cnt; /* size of the config-cmd */ + unsigned char fifo; /* fifo/recv monitor */ + unsigned char sav_bf; /* save bad frames (bit7=1)*/ + unsigned char adr_len; /* adr_len(0-2),al_loc(3),pream(4-5),loopbak(6-7)*/ + unsigned char priority; /* lin_prio(0-2),exp_prio(4-6),bof_metd(7) */ + unsigned char ifs; /* inter frame spacing */ + unsigned char time_low; /* slot time low */ + unsigned char time_high; /* slot time high(0-2) and max. retries(4-7) */ + unsigned char promisc; /* promisc-mode(0) , et al (1-7) */ + unsigned char carr_coll; /* carrier(0-3)/collision(4-7) stuff */ + unsigned char fram_len; /* minimal frame len */ + unsigned char dummy; /* dummy */ +}; + +/* + * Multicast Setup command + */ +struct mcsetup_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short mc_cnt; /* number of bytes in the MC-List */ + unsigned char mc_list[0][6]; /* pointer to 6 bytes entries */ +}; + +/* + * transmit command + */ +struct transmit_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short tbd_offset; /* pointeroffset to TBD */ + unsigned char dest[6]; /* destination address of the frame */ + unsigned short length; /* user defined: 802.3 length / Ether type */ +}; + +#define TCMD_ERRMASK 0x0fa0 +#define TCMD_MAXCOLLMASK 0x000f +#define TCMD_MAXCOLL 0x0020 +#define TCMD_HEARTBEAT 0x0040 +#define TCMD_DEFERRED 0x0080 +#define TCMD_UNDERRUN 0x0100 +#define TCMD_LOSTCTS 0x0200 +#define TCMD_NOCARRIER 0x0400 +#define TCMD_LATECOLL 0x0800 + +struct tdr_cmd_struct +{ + unsigned short cmd_status; + unsigned short cmd_cmd; + unsigned short cmd_link; + unsigned short status; +}; + +#define TDR_LNK_OK 0x8000 /* No link problem identified */ +#define TDR_XCVR_PRB 0x4000 /* indicates a transceiver problem */ +#define TDR_ET_OPN 0x2000 /* open, no correct termination */ +#define TDR_ET_SRT 0x1000 /* TDR detected a short circuit */ +#define TDR_TIMEMASK 0x07ff /* mask for the time field */ + +/* + * Transmit Buffer Descriptor (TBD) + */ +struct tbd_struct +{ + unsigned short size; /* size + EOF-Flag(15) */ + unsigned short next; /* pointeroffset to next TBD */ + char *buffer; /* pointer to buffer */ +}; + +#define TBD_LAST 0x8000 /* EOF-Flag, indicates last buffer in list */ + +/*************************************************************************/ +/* +Verbatim from the Crynwyr stuff: + + The 3c523 responds with adapter code 0x6042 at slot +registers xxx0 and xxx1. The setup register is at xxx2 and +contains the following bits: + +0: card enable +2,1: csr address select + 00 = 0300 + 01 = 1300 + 10 = 2300 + 11 = 3300 +4,3: shared memory address select + 00 = 0c0000 + 01 = 0c8000 + 10 = 0d0000 + 11 = 0d8000 +5: set to disable on-board thinnet +7,6: (read-only) shows selected irq + 00 = 12 + 01 = 7 + 10 = 3 + 11 = 9 + +The interrupt-select register is at xxx3 and uses one bit per irq. + +0: int 12 +1: int 7 +2: int 3 +3: int 9 + + Again, the documentation stresses that the setup register +should never be written. The interrupt-select register may be +written with the value corresponding to bits 7.6 in +the setup register to insure corret setup. +*/ + +/* Offsets from the base I/O address. */ +#define ELMC_SA 0 /* first 6 bytes are IEEE network address */ +#define ELMC_CTRL 6 /* control & status register */ +#define ELMC_REVISION 7 /* revision register, first 4 bits only */ +#define ELMC_IO_EXTENT 8 + +/* these are the bit selects for the port register 2 */ +#define ELMC_STATUS_ENABLED 0x01 +#define ELMC_STATUS_CSR_SELECT 0x06 +#define ELMC_STATUS_MEMORY_SELECT 0x18 +#define ELMC_STATUS_DISABLE_THIN 0x20 +#define ELMC_STATUS_IRQ_SELECT 0xc0 + +/* this is the card id used in the detection code. You might recognize +it from @6042.adf */ +#define ELMC_MCA_ID 0x6042 + +/* + The following define the bits for the control & status register + + The bank select registers can be used if more than 16K of memory is + on the card. For some stupid reason, bank 3 is the one for the + bottom 16K, and the card defaults to bank 0. So we have to set the + bank to 3 before the card will even think of operating. To get bank + 3, set BS0 and BS1 to high (of course...) +*/ +#define ELMC_CTRL_BS0 0x01 /* RW bank select */ +#define ELMC_CTRL_BS1 0x02 /* RW bank select */ +#define ELMC_CTRL_INTE 0x04 /* RW interrupt enable, assert high */ +#define ELMC_CTRL_INT 0x08 /* R interrupt active, assert high */ +/*#define ELMC_CTRL_* 0x10*/ /* reserved */ +#define ELMC_CTRL_LBK 0x20 /* RW loopback enable, assert high */ +#define ELMC_CTRL_CA 0x40 /* RW channel attention, assert high */ +#define ELMC_CTRL_RST 0x80 /* RW 82586 reset, assert low */ + +/* some handy compound bits */ + +/* normal operation should have bank 3 and RST high, ints enabled */ +#define ELMC_NORMAL (ELMC_CTRL_INTE|ELMC_CTRL_RST|0x3) + +#endif /* _3c523_INCLUDE_ */ |
