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      1 /*	$NetBSD: elink3reg.h,v 1.31 2006/11/05 05:57:53 itohy Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Herb Peyerl <hpeyerl (at) beer.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Herb Peyerl.
     18  * 4. The name of Herb Peyerl may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  *
     32  */
     33 
     34 /*
     35  * These define the EEPROM data structure.  They are used in the probe
     36  * function to verify the existence of the adapter after having sent
     37  * the ID_Sequence.
     38  */
     39 #define EEPROM_NODE_ADDR_0	0x0	/* Word */
     40 #define EEPROM_NODE_ADDR_1	0x1	/* Word */
     41 #define EEPROM_NODE_ADDR_2	0x2	/* Word */
     42 #define EEPROM_PROD_ID		0x3	/* 0x9[0-f]50 */
     43 #define EEPROM_MFG_DATE		0x4	/* Manufacturing date */
     44 #define EEPROM_MFG_DIVSION	0x5	/* Manufacturing division */
     45 #define EEPROM_MFG_PRODUCT	0x6	/* Product code */
     46 #define EEPROM_MFG_ID		0x7	/* 0x6d50 */
     47 #define EEPROM_ADDR_CFG		0x8	/* Base addr */
     48 #define EEPROM_RESOURCE_CFG	0x9     /* IRQ. Bits 12-15 */
     49 #define EEPROM_OEM_ADDR0	0xa
     50 #define EEPROM_OEM_ADDR1	0xb
     51 #define EEPROM_OEM_ADDR2	0xc
     52 #define EEPROM_SOFTINFO		0xd
     53 #define EEPROM_COMPAT		0xe
     54 #define EEPROM_SOFTINFO2	0xf
     55 #define EEPROM_CAP		0x10
     56 #define EEPROM_CONFIG_LOW	0x12
     57 #define EEPROM_CONFIG_HIGH	0x13
     58 #define EEPROM_SSI		0x14
     59 #define EEPROM_CHECKSUM_EL3	0x17
     60 
     61 /*
     62  * These are the registers for the 3Com 3c509 and their bit patterns when
     63  * applicable.  They have been taken out of the "EtherLink III Parallel
     64  * Tasking EISA and ISA Technical Reference" "Beta Draft 10/30/92" manual
     65  * from 3com.
     66  */
     67 #define ELINK_COMMAND	0x0e    /* Write. BASE+0x0e is always a command reg. */
     68 #define ELINK_STATUS	0x0e    /* Read. BASE+0x0e is always status reg. */
     69 #define ELINK_WINDOW	0x0f    /* Read. BASE+0x0f is always window reg. */
     70 
     71 /*
     72  * Corkscrew ISA Bridge ASIC registers.
     73  */
     74 #define	CORK_ASIC_DCR		0x2000
     75 #define	CORK_ASIC_RCR		0x2002
     76 #define	CORK_ASIC_ROM_PAGE	0x2004	/* 8-bit */
     77 #define	CORK_ASIC_MCR		0x2006	/* 8-bit */
     78 #define	CORK_ASIC_DEBUG		0x2008	/* 8-bit */
     79 #define	CORK_ASIC_EEPROM_COMMAND 0x200a
     80 #define	CORK_ASIC_EEPROM_DATA	0x200c
     81 
     82 /*
     83  * Corkscrew DMA Control Register.
     84  */
     85 #define	DCR_CHRDYWAIT_40ns	(0 << 13)
     86 #define	DCR_CHRDYWAIT_80ns	(1 << 13)
     87 #define	DCR_CHRDYWAIT_120ns	(2 << 13)
     88 #define	DCR_CHRDYWAIT_160ns	(3 << 13)
     89 #define	DCR_RECOVWAIT_80ns	(0 << 11)
     90 #define	DCR_RECOVWAIT_120ns	(1 << 11)
     91 #define	DCR_RECOVWAIT_160ns	(2 << 11)
     92 #define	DCR_RECOVWAIT_200ns	(3 << 11)
     93 #define	DCR_CMDWIDTH(x)		((x) << 8) /* base 40ns, 40ns increments */
     94 #define	DCR_BURSTLEN(x)		((x) << 3)
     95 #define	DCR_DRQSELECT(x)	((x) << 0) /* 3, 5, 6, 7 valid */
     96 
     97 /*
     98  * Corkscrew Debug register.
     99  */
    100 #define	DEBUG_PCIBUSFAULT	(1U << 0)
    101 #define	DEBUG_ISABUSFAULT	(1U << 1)
    102 
    103 /*
    104  * Corkscrew EEPROM Command register.
    105  */
    106 #define	CORK_EEPROM_BUSY	(1U << 9)
    107 #define	CORK_EEPROM_CMD_READ	(1U << 7)	/* Same as 3c509 */
    108 
    109 /*
    110  * Corkscrew Master Control register.
    111  */
    112 #define	MCR_PCI_CONFIG		(1U << 0)
    113 #define	MCR_WRITE_BUFFER	(1U << 1)
    114 #define	MCR_READ_PREFETCH	(1U << 2)
    115 
    116 /*
    117  * Window 0 registers. Setup.
    118  */
    119 	/* Write */
    120 #define ELINK_W0_EEPROM_DATA	0x0c
    121 #define ELINK_W0_EEPROM_COMMAND	0x0a
    122 #define ELINK_W0_RESOURCE_CFG	0x08
    123 #define ELINK_W0_ADDRESS_CFG	0x06
    124 #define ELINK_W0_CONFIG_CTRL	0x04
    125 	/* Read */
    126 #define ELINK_W0_PRODUCT_ID	0x02
    127 #define ELINK_W0_MFG_ID		0x00
    128 
    129 /*
    130  * Window 1 registers. Operating Set.
    131  */
    132 	/* Write */
    133 #define ELINK_W1_TX_PIO_WR_2	0x02
    134 #define ELINK_W1_TX_PIO_WR_1	0x00
    135 	/* Read */
    136 #define ELINK_W1_FREE_TX	0x0c
    137 #define ELINK_W1_TX_STATUS	0x0a
    138 #define ELINK_W1_RX_STATUS	0x08
    139 #define	ELINK_W1_RX_ERRORS	0x04
    140 #define ELINK_W1_RX_PIO_RD_2	0x02
    141 #define ELINK_W1_RX_PIO_RD_1	0x00
    142 /*
    143  * Special registers used by the RoadRunner.  These are used to program
    144  * a FIFO buffer to reduce the PCMCIA->PCI bridge latency during PIO.
    145  */
    146 #define	ELINK_W1_RUNNER_RDCTL	0x16
    147 #define	ELINK_W1_RUNNER_WRCTL	0x1c
    148 
    149 /*
    150  * Window 2 registers. Station Address Setup/Read
    151  */
    152 	/* Read/Write */
    153 #define ELINK_W2_RECVMASK_0	0x06
    154 #define ELINK_W2_ADDR_5		0x05
    155 #define ELINK_W2_ADDR_4		0x04
    156 #define ELINK_W2_ADDR_3		0x03
    157 #define ELINK_W2_ADDR_2		0x02
    158 #define ELINK_W2_ADDR_1		0x01
    159 #define ELINK_W2_ADDR_0		0x00
    160 
    161 /*
    162  * Window 3 registers.  Configuration and FIFO Management.
    163  */
    164 	/* Read */
    165 #define ELINK_W3_FREE_TX		0x0c
    166 #define ELINK_W3_FREE_RX		0x0a
    167 	/* Read/Write, at least on busmastering cards. */
    168 #define ELINK_W3_INTERNAL_CONFIG	0x00	/* 32 bits */
    169 #define ELINK_W3_OTHER_INT		0x04	/*  8 bits */
    170 #define ELINK_W3_PIO_RESERVED	0x05	/*  8 bits */
    171 #define ELINK_W3_MAC_CONTROL	0x06	/* 16 bits */
    172 #define ELINK_W3_RESET_OPTIONS	0x08	/* 16 bits */
    173 
    174 /*
    175  * Window 4 registers. Diagnostics.
    176  */
    177 	/* Read/Write */
    178 #define ELINK_W4_MEDIA_TYPE		0x0a
    179 #define ELINK_W4_CTRLR_STATUS		0x08
    180 #define ELINK_W4_NET_DIAG		0x06
    181 #define ELINK_W4_FIFO_DIAG		0x04
    182 #define ELINK_W4_HOST_DIAG		0x02
    183 #define ELINK_W4_TX_DIAG		0x00
    184 
    185 /*
    186  * Window 4 offset 8 is the PHY Management register on the
    187  * 3c90x.
    188  */
    189 #define	ELINK_W4_BOOM_PHYSMGMT	0x08
    190 #define	PHYSMGMT_CLK		0x0001
    191 #define	PHYSMGMT_DATA		0x0002
    192 #define	PHYSMGMT_DIR		0x0004
    193 
    194 
    195 /*
    196  * Window 5 Registers.  Results and Internal status.
    197  */
    198 	/* Read */
    199 #define ELINK_W5_READ_0_MASK	0x0c
    200 #define ELINK_W5_INTR_MASK		0x0a
    201 #define ELINK_W5_RX_FILTER		0x08
    202 #define ELINK_W5_RX_EARLY_THRESH	0x06
    203 #define ELINK_W5_TX_AVAIL_THRESH	0x02
    204 #define ELINK_W5_TX_START_THRESH	0x00
    205 
    206 /*
    207  * Window 6 registers. Statistics.
    208  */
    209 	/* Read/Write */
    210 #define TX_TOTAL_OK		0x0c
    211 #define RX_TOTAL_OK		0x0a
    212 #define UPPER_FRAMES_OK		0x09
    213 #define TX_DEFERRALS		0x08
    214 #define RX_FRAMES_OK		0x07
    215 #define TX_FRAMES_OK		0x06
    216 #define RX_OVERRUNS		0x05
    217 #define TX_COLLISIONS		0x04
    218 #define TX_AFTER_1_COLLISION	0x03
    219 #define TX_AFTER_X_COLLISIONS	0x02
    220 #define TX_NO_SQE		0x01
    221 #define TX_CD_LOST		0x00
    222 
    223 /*
    224  * Window 7 registers.
    225  * Address and length for a single bus-master DMA transfer.
    226  * Unused for elink3 cards.
    227  */
    228 #define ELINK_W7_MASTER_ADDRES	0x00
    229 #define ELINK_W7_RX_ERROR	0x04
    230 #define ELINK_W7_MASTER_LEN	0x06
    231 #define ELINK_W7_RX_STATUS	0x08
    232 #define ELINK_W7_MASTER_STATUS	0x0c
    233 
    234 /*
    235  * Register definitions.
    236  */
    237 
    238 /*
    239  * Command register. All windows.
    240  *
    241  * 16 bit register.
    242  *     15-11:  5-bit code for command to be executed.
    243  *     10-0:   11-bit arg if any. For commands with no args;
    244  *	      this can be set to anything.
    245  */
    246 /* Wait at least 1ms after issuing */
    247 #define GLOBAL_RESET		(u_int16_t) 0x0000
    248 #define WINDOW_SELECT		(u_int16_t) (0x01<<11)
    249 /*
    250  * Read ADDR_CFG reg to determine whether this is needed. If so; wait 800
    251  * uSec before using transceiver.
    252  */
    253 #define START_TRANSCEIVER	(u_int16_t) (0x02<<11)
    254 /* state disabled on power-up */
    255 #define RX_DISABLE		(u_int16_t) (0x03<<11)
    256 #define RX_ENABLE		(u_int16_t) (0x04<<11)
    257 #define RX_RESET		(u_int16_t) (0x05<<11)
    258 #define RX_DISCARD_TOP_PACK	(u_int16_t) (0x08<<11)
    259 #define TX_ENABLE		(u_int16_t) (0x09<<11)
    260 #define TX_DISABLE		(u_int16_t) (0x0a<<11)
    261 #define TX_RESET		(u_int16_t) (0x0b<<11)
    262 #define REQ_INTR		(u_int16_t) (0x0c<<11)
    263 #define ACK_INTR		(u_int16_t) (0x0d<<11)
    264 #define SET_INTR_MASK		(u_int16_t) (0x0e<<11)
    265 /* busmastering-cards only? */
    266 #define STATUS_ENABLE		(u_int16_t) (0x0f<<11)
    267 #define SET_RD_0_MASK		(u_int16_t) (0x0f<<11)
    268 
    269 #define SET_RX_FILTER		(u_int16_t) (0x10<<11)
    270 #      define FIL_INDIVIDUAL	(u_int16_t) (0x01)
    271 #      define FIL_MULTICAST	(u_int16_t) (0x02)
    272 #      define FIL_BRDCST	(u_int16_t) (0x04)
    273 #      define FIL_PROMISC	(u_int16_t) (0x08)
    274 
    275 #define SET_RX_EARLY_THRESH	(u_int16_t) (0x11<<11)
    276 #define SET_TX_AVAIL_THRESH	(u_int16_t) (0x12<<11)
    277 #define SET_TX_START_THRESH	(u_int16_t) (0x13<<11)
    278 #define START_DMA		(u_int16_t) (0x14<<11)	/* busmaster-only */
    279 #  define START_DMA_TX		(START_DMA | 0x0))	/* busmaster-only */
    280 #  define START_DMA_RX		(START_DMA | 0x1)	/* busmaster-only */
    281 #define STATS_ENABLE		(u_int16_t) (0x15<<11)
    282 #define STATS_DISABLE		(u_int16_t) (0x16<<11)
    283 #define STOP_TRANSCEIVER	(u_int16_t) (0x17<<11)
    284 
    285 /* Only on adapters that support power management: */
    286 #define POWERUP			(u_int16_t) (0x1b<<11)
    287 #define POWERDOWN		(u_int16_t) (0x1c<<11)
    288 #define POWERAUTO		(u_int16_t) (0x1d<<11)
    289 
    290 
    291 
    292 /*
    293  * Command parameter that disables threshold interrupts
    294  *   PIO (3c509) cards use 2044.  The fifo word-oriented and 2044--2047 work.
    295  *  "busmastering" cards need 8188.
    296  * The implicit two-bit upshift done by busmastering cards means
    297  * a value of 2047 disables threshold interrupts on both.
    298  */
    299 #define ELINK_THRESH_DISABLE	2047
    300 
    301 
    302 /*
    303  * Status register. All windows.
    304  *
    305  *     15-13:  Window number(0-7).
    306  *     12:     Command_in_progress.
    307  *     11:     reserved / DMA in progress on busmaster cards.
    308  *     10:     reserved.
    309  *     9:      reserved.
    310  *     8:      reserved / DMA done on busmaster cards.
    311  *     7:      Update Statistics.
    312  *     6:      Interrupt Requested.
    313  *     5:      RX Early.
    314  *     4:      RX Complete.
    315  *     3:      TX Available.
    316  *     2:      TX Complete.
    317  *     1:      Adapter Failure.
    318  *     0:      Interrupt Latch.
    319  */
    320 #define INTR_LATCH		(u_int16_t) (0x0001)
    321 #define CARD_FAILURE		(u_int16_t) (0x0002)
    322 #define TX_COMPLETE		(u_int16_t) (0x0004)
    323 #define TX_AVAIL		(u_int16_t) (0x0008)
    324 #define RX_COMPLETE		(u_int16_t) (0x0010)
    325 #define RX_EARLY		(u_int16_t) (0x0020)
    326 #define INT_RQD			(u_int16_t) (0x0040)
    327 #define UPD_STATS		(u_int16_t) (0x0080)
    328 #define DMA_DONE		(u_int16_t) (0x0100)	/* DMA cards only */
    329 #define DMA_IN_PROGRESS		(u_int16_t) (0x0800)	/* DMA cards only */
    330 #define COMMAND_IN_PROGRESS	(u_int16_t) (0x1000)
    331 
    332 #define ALL_INTERRUPTS	(CARD_FAILURE | TX_COMPLETE | TX_AVAIL | RX_COMPLETE | \
    333     RX_EARLY | INT_RQD | UPD_STATS)
    334 
    335 #define WATCHED_INTERRUPTS (CARD_FAILURE | TX_COMPLETE | RX_COMPLETE | TX_AVAIL)
    336 
    337 /*
    338  * FIFO Registers.  RX Status.
    339  *
    340  *     15:     Incomplete or FIFO empty.
    341  *     14:     1: Error in RX Packet   0: Incomplete or no error.
    342  *     14-11:  Type of error. [14-11]
    343  *	      1000 = Overrun.
    344  *	      1011 = Run Packet Error.
    345  *	      1100 = Alignment Error.
    346  *	      1101 = CRC Error.
    347  *	      1001 = Oversize Packet Error (>1514 bytes)
    348  *	      0010 = Dribble Bits.
    349  *	      (all other error codes, no errors.)
    350  *
    351  *     10-0:   RX Bytes (0-1514)
    352  */
    353 #define ERR_INCOMPLETE  (u_int16_t) (0x8000)
    354 #define ERR_RX		(u_int16_t) (0x4000)
    355 #define ERR_MASK	(u_int16_t) (0x7800)
    356 #define ERR_OVERRUN	(u_int16_t) (0x4000)
    357 #define ERR_RUNT	(u_int16_t) (0x5800)
    358 #define ERR_ALIGNMENT	(u_int16_t) (0x6000)
    359 #define ERR_CRC		(u_int16_t) (0x6800)
    360 #define ERR_OVERSIZE	(u_int16_t) (0x4800)
    361 #define ERR_DRIBBLE	(u_int16_t) (0x1000)
    362 
    363 /*
    364  * TX Status
    365  *
    366  *   Reports the transmit status of a completed transmission. Writing this
    367  *   register pops the transmit completion stack.
    368  *
    369  *   Window 1/Port 0x0b.
    370  *
    371  *     7:      Complete
    372  *     6:      Interrupt on successful transmission requested.
    373  *     5:      Jabber Error (TP Only, TX Reset required. )
    374  *     4:      Underrun (TX Reset required. )
    375  *     3:      Maximum Collisions.
    376  *     2:      TX Status Overflow.
    377  *     1-0:    Undefined.
    378  *
    379  */
    380 #define TXS_COMPLETE		0x8000
    381 #define TXS_INTR_REQ		0x4000
    382 #define TXS_JABBER		0x2000
    383 #define TXS_UNDERRUN		0x1000
    384 #define TXS_MAX_COLLISION	0x0800
    385 #define TXS_STATUS_OVERFLOW	0x0400
    386 #define TXS_RECLAIM		0x0200
    387 #define	TXS_TIMER		0x00ff
    388 
    389 /*
    390  * RX status
    391  *   Window 1/Port 0x08.
    392  */
    393 #define RX_BYTES_MASK			(u_int16_t) (0x07ff)
    394 
    395 /*
    396  * Internal Config and MAC control (Window 3)
    397  * Window 3 / Port 0: 32-bit internal config register:
    398  * bits  0-2:    fifo buffer ram  size
    399  *         3:    ram width (word/byte)     (ro)
    400  *       4-5:    ram speed
    401  *       6-7:    rom size
    402  *      8-15:   reserved
    403  *
    404  *     16-17:   ram split (5:3, 3:1, or 1:1).
    405  *     18-19:   reserved
    406  *     20-22:   selected media type
    407  *        21:   unused
    408  *        24:  (nonvolatile) driver should autoselect media
    409  *     25-31: reserved
    410  *
    411  * The low-order 16 bits should generally not be changed by software.
    412  * Offsets defined for two 16-bit words, to help out 16-bit busses.
    413  */
    414 #define	CONFIG_RAMSIZE		(u_int16_t) 0x0007
    415 #define	CONFIG_RAMSIZE_SHIFT	0
    416 
    417 #define	CONFIG_RAMWIDTH		(u_int16_t) 0x0008
    418 #define	CONFIG_RAMWIDTH_SHIFT	3
    419 
    420 #define	CONFIG_RAMSPEED		(u_int16_t) 0x0030
    421 #define	CONFIG_RAMSPEED_SHIFT	4
    422 #define	CONFIG_ROMSIZE		(u_int16_t) 0x00c0
    423 #define	CONFIG_ROMSIZE_SHIFT	6
    424 
    425 /* Window 3/port 2 */
    426 #define	CONFIG_RAMSPLIT		(u_int16_t) 0x0003
    427 #define	CONFIG_RAMSPLIT_SHIFT	0
    428 #define	CONFIG_MEDIAMASK	(u_int16_t) 0x0070
    429 #define	CONFIG_MEDIAMASK_SHIFT	4
    430 
    431 #define	CONFIG_AUTOSELECT	(u_int16_t) 0x0100
    432 #define	CONFIG_AUTOSELECT_SHIFT	8
    433 
    434 /*
    435  * MAC_CONTROL (Window 3)
    436  */
    437 #define MAC_CONTROL_FDX		0x20    /* full-duplex mode */
    438 
    439 
    440 /* Active media in INTERNAL_CONFIG media bits */
    441 
    442 #define ELINKMEDIA_10BASE_T		(u_int16_t)   0x00
    443 #define ELINKMEDIA_AUI			(u_int16_t)   0x01
    444 #define ELINKMEDIA_RESV1		(u_int16_t)   0x02
    445 #define ELINKMEDIA_10BASE_2		(u_int16_t)   0x03
    446 #define ELINKMEDIA_100BASE_TX		(u_int16_t)   0x04
    447 #define ELINKMEDIA_100BASE_FX		(u_int16_t)   0x05
    448 #define ELINKMEDIA_MII			(u_int16_t)   0x06
    449 #define ELINKMEDIA_100BASE_T4		(u_int16_t)   0x07
    450 
    451 
    452 /*
    453  * RESET_OPTIONS (Window 3, on Demon/Vortex/Boomerang only)
    454  * also mapped to PCI configuration space on PCI adaptors.
    455  *
    456  * (same register as  Vortex ELINK_W3_RESET_OPTIONS, mapped to pci-config space)
    457  */
    458 #define ELINK_PCI_100BASE_T4		(1<<0)
    459 #define ELINK_PCI_100BASE_TX		(1<<1)
    460 #define ELINK_PCI_100BASE_FX		(1<<2)
    461 #define ELINK_PCI_10BASE_T			(1<<3)
    462 #define ELINK_PCI_BNC			(1<<4)
    463 #define ELINK_PCI_AUI 			(1<<5)
    464 #define ELINK_PCI_100BASE_MII		(1<<6)
    465 #define ELINK_PCI_INTERNAL_VCO		(1<<8)
    466 
    467 #define	ELINK_PCI_MEDIAMASK	(ELINK_PCI_100BASE_T4|ELINK_PCI_100BASE_TX| \
    468 				 ELINK_PCI_100BASE_FX|ELINK_PCI_10BASE_T| \
    469 				 ELINK_PCI_BNC|ELINK_PCI_AUI| \
    470 				 ELINK_PCI_100BASE_MII)
    471 
    472 #define	ELINK_RUNNER_MII_RESET		0x4000
    473 #define	ELINK_RUNNER_ENABLE_MII		0x8000
    474 
    475 /*
    476  * FIFO Status (Window 4)
    477  *
    478  *   Supports FIFO diagnostics
    479  *
    480  *   Window 4/Port 0x04.1
    481  *
    482  *     15:	1=RX receiving (RO). Set when a packet is being received
    483  *		into the RX FIFO.
    484  *     14:	Reserved
    485  *     13:	1=RX underrun (RO). Generates Adapter Failure interrupt.
    486  *		Requires RX Reset or Global Reset command to recover.
    487  *		It is generated when you read past the end of a packet -
    488  *		reading past what has been received so far will give bad
    489  *		data.
    490  *     12:	1=RX status overrun (RO). Set when there are already 8
    491  *		packets in the RX FIFO. While this bit is set, no additional
    492  *		packets are received. Requires no action on the part of
    493  *		the host. The condition is cleared once a packet has been
    494  *		read out of the RX FIFO.
    495  *     11:	1=RX overrun (RO). Set when the RX FIFO is full (there
    496  *		may not be an overrun packet yet). While this bit is set,
    497  *		no additional packets will be received (some additional
    498  *		bytes can still be pending between the wire and the RX
    499  *		FIFO). Requires no action on the part of the host. The
    500  *		condition is cleared once a few bytes have been read out
    501  *		from the RX FIFO.
    502  *     10:	1=TX overrun (RO). Generates adapter failure interrupt.
    503  *		Requires TX Reset or Global Reset command to recover.
    504  *		Disables Transmitter.
    505  *     9-8:	Unassigned.
    506  *     7-0:	Built in self test bits for the RX and TX FIFO's.
    507  */
    508 #define	FIFOS_RX_RECEIVING	(u_int16_t) 0x8000
    509 #define	FIFOS_RX_UNDERRUN	(u_int16_t) 0x2000
    510 #define	FIFOS_RX_STATUS_OVERRUN	(u_int16_t) 0x1000
    511 #define	FIFOS_RX_OVERRUN	(u_int16_t) 0x0800
    512 #define	FIFOS_TX_OVERRUN	(u_int16_t) 0x0400
    513 
    514 /*
    515  * ISA/eisa CONFIG_CNTRL media-present bits.
    516  */
    517 #define ELINK_W0_CC_AUI 			(1<<13)
    518 #define ELINK_W0_CC_BNC 			(1<<12)
    519 #define ELINK_W0_CC_UTP 			(1<<9)
    520 #define	ELINK_W0_CC_MEDIAMASK	(ELINK_W0_CC_AUI|ELINK_W0_CC_BNC| \
    521 				 ELINK_W0_CC_UTP)
    522 
    523 /* EEPROM state flags/commands */
    524 #define EEPROM_BUSY			(1<<15)
    525 #define EEPROM_TST_MODE			(1<<14)
    526 
    527 #define READ_EEPROM			(1<<7)
    528 
    529 	/* For the RoadRunner chips... */
    530 #define	WRITE_EEPROM_RR			0x100
    531 #define	READ_EEPROM_RR			0x200
    532 #define	ERASE_EEPROM_RR			0x300
    533 
    534 /* window 4, MEDIA_STATUS bits */
    535 #define SQE_ENABLE			0x08	/* Enables SQE on AUI ports */
    536 #define JABBER_GUARD_ENABLE		0x40
    537 #define LINKBEAT_ENABLE			0x80
    538 #define DISABLE_UTP			0x0
    539 #define LINKBEAT_DETECT			0x800
    540 
    541 /*
    542  * Misc defines for various things.
    543  */
    544 #define TAG_ADAPTER 			0xd0
    545 #define ACTIVATE_ADAPTER_TO_CONFIG 	0xff
    546 #define ENABLE_DRQ_IRQ			0x0001
    547 #define MFG_ID				0x506d	/* `TCM' */
    548 #define PROD_ID_3C509			0x5090	/* 509[0-f] */
    549 #define GO_WINDOW(x) 			bus_space_write_2(sc->sc_iot, \
    550 				sc->sc_ioh, ELINK_COMMAND, WINDOW_SELECT|x)
    551 
    552 
    553 /* Used to probe for large-packet support. */
    554 #define ELINK_LARGEWIN_PROBE		ELINK_THRESH_DISABLE
    555 #define ELINK_LARGEWIN_MASK		0xffc
    556