elink3reg.h revision 1.21 1 /* $NetBSD: elink3reg.h,v 1.21 1999/10/11 17:41:56 thorpej 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 existance 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 the 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 * Window 0 registers. Setup.
73 */
74 /* Write */
75 #define ELINK_W0_EEPROM_DATA 0x0c
76 #define ELINK_W0_EEPROM_COMMAND 0x0a
77 #define ELINK_W0_RESOURCE_CFG 0x08
78 #define ELINK_W0_ADDRESS_CFG 0x06
79 #define ELINK_W0_CONFIG_CTRL 0x04
80 /* Read */
81 #define ELINK_W0_PRODUCT_ID 0x02
82 #define ELINK_W0_MFG_ID 0x00
83
84 /*
85 * Window 1 registers. Operating Set.
86 */
87 /* Write */
88 #define ELINK_W1_TX_PIO_WR_2 0x02
89 #define ELINK_W1_TX_PIO_WR_1 0x00
90 /* Read */
91 #define ELINK_W1_FREE_TX 0x0c
92 #define ELINK_W1_TX_STATUS 0x0b /* byte */
93 #define ELINK_W1_TIMER 0x0a /* byte */
94 #define ELINK_W1_RX_STATUS 0x08
95 #define ELINK_W1_RX_PIO_RD_2 0x02
96 #define ELINK_W1_RX_PIO_RD_1 0x00
97 /*
98 * Special registers used by the RoadRunner. These are used to program
99 * a FIFO buffer to reduce the PCMCIA->PCI bridge latency during PIO.
100 */
101 #define ELINK_W1_RUNNER_RDCTL 0x16
102 #define ELINK_W1_RUNNER_WRCTL 0x1c
103
104 /*
105 * Window 2 registers. Station Address Setup/Read
106 */
107 /* Read/Write */
108 #define ELINK_W2_RECVMASK_0 0x06
109 #define ELINK_W2_ADDR_5 0x05
110 #define ELINK_W2_ADDR_4 0x04
111 #define ELINK_W2_ADDR_3 0x03
112 #define ELINK_W2_ADDR_2 0x02
113 #define ELINK_W2_ADDR_1 0x01
114 #define ELINK_W2_ADDR_0 0x00
115
116 /*
117 * Window 3 registers. Configuration and FIFO Management.
118 */
119 /* Read */
120 #define ELINK_W3_FREE_TX 0x0c
121 #define ELINK_W3_FREE_RX 0x0a
122 /* Read/Write, at least on busmastering cards. */
123 #define ELINK_W3_INTERNAL_CONFIG 0x00 /* 32 bits */
124 #define ELINK_W3_OTHER_INT 0x04 /* 8 bits */
125 #define ELINK_W3_PIO_RESERVED 0x05 /* 8 bits */
126 #define ELINK_W3_MAC_CONTROL 0x06 /* 16 bits */
127 #define ELINK_W3_RESET_OPTIONS 0x08 /* 16 bits */
128
129 /*
130 * Window 4 registers. Diagnostics.
131 */
132 /* Read/Write */
133 #define ELINK_W4_MEDIA_TYPE 0x0a
134 #define ELINK_W4_CTRLR_STATUS 0x08
135 #define ELINK_W4_NET_DIAG 0x06
136 #define ELINK_W4_FIFO_DIAG 0x04
137 #define ELINK_W4_HOST_DIAG 0x02
138 #define ELINK_W4_TX_DIAG 0x00
139
140 /*
141 * Window 4 offset 8 is the PHY Management register on the
142 * 3c90x.
143 */
144 #define ELINK_W4_BOOM_PHYSMGMT 0x08
145 #define PHYSMGMT_CLK 0x0001
146 #define PHYSMGMT_DATA 0x0002
147 #define PHYSMGMT_DIR 0x0004
148
149
150 /*
151 * Window 5 Registers. Results and Internal status.
152 */
153 /* Read */
154 #define ELINK_W5_READ_0_MASK 0x0c
155 #define ELINK_W5_INTR_MASK 0x0a
156 #define ELINK_W5_RX_FILTER 0x08
157 #define ELINK_W5_RX_EARLY_THRESH 0x06
158 #define ELINK_W5_TX_AVAIL_THRESH 0x02
159 #define ELINK_W5_TX_START_THRESH 0x00
160
161 /*
162 * Window 6 registers. Statistics.
163 */
164 /* Read/Write */
165 #define TX_TOTAL_OK 0x0c
166 #define RX_TOTAL_OK 0x0a
167 #define UPPER_FRAMES_OK 0x09
168 #define TX_DEFERRALS 0x08
169 #define RX_FRAMES_OK 0x07
170 #define TX_FRAMES_OK 0x06
171 #define RX_OVERRUNS 0x05
172 #define TX_COLLISIONS 0x04
173 #define TX_AFTER_1_COLLISION 0x03
174 #define TX_AFTER_X_COLLISIONS 0x02
175 #define TX_NO_SQE 0x01
176 #define TX_CD_LOST 0x00
177
178 /*
179 * Window 7 registers.
180 * Address and length for a single bus-master DMA transfer.
181 * Unused for elink3 cards.
182 */
183 #define ELINK_W7_MASTER_ADDDRES 0x00
184 #define ELINK_W7_RX_ERROR 0x04
185 #define ELINK_W7_MASTER_LEN 0x06
186 #define ELINK_W7_RX_STATUS 0x08
187 #define ELINK_W7_TIMER 0x0a
188 #define ELINK_W7_TX_STATUS 0x0b
189 #define ELINK_W7_MASTER_STATUS 0x0c
190
191 /*
192 * Register definitions.
193 */
194
195 /*
196 * Command register. All windows.
197 *
198 * 16 bit register.
199 * 15-11: 5-bit code for command to be executed.
200 * 10-0: 11-bit arg if any. For commands with no args;
201 * this can be set to anything.
202 */
203 #define GLOBAL_RESET (u_int16_t) 0x0000 /* Wait at least 1ms after issuing */
204 #define WINDOW_SELECT (u_int16_t) (0x1<<11)
205 #define START_TRANSCEIVER (u_int16_t) (0x2<<11) /* Read ADDR_CFG reg to determine
206 whether this is needed. If so;
207 wait 800 uSec before using trans-
208 ceiver. */
209 #define RX_DISABLE (u_int16_t) (0x3<<11) /* state disabled on power-up */
210 #define RX_ENABLE (u_int16_t) (0x4<<11)
211 #define RX_RESET (u_int16_t) (0x5<<11)
212 #define RX_DISCARD_TOP_PACK (u_int16_t) (0x8<<11)
213 #define TX_ENABLE (u_int16_t) (0x9<<11)
214 #define TX_DISABLE (u_int16_t) (0xa<<11)
215 #define TX_RESET (u_int16_t) (0xb<<11)
216 #define REQ_INTR (u_int16_t) (0xc<<11)
217
218 /*
219 * The following C_* acknowledge the various interrupts.
220 * Some of them don't do anything. See the manual.
221 */
222 #define ACK_INTR (u_int16_t) (0xd << 11)
223 # define C_INTR_LATCH (u_int16_t) (ACK_INTR|0x01)
224 # define C_CARD_FAILURE (u_int16_t) (ACK_INTR|0x02)
225 # define C_TX_COMPLETE (u_int16_t) (ACK_INTR|0x04)
226 # define C_TX_AVAIL (u_int16_t) (ACK_INTR|0x08)
227 # define C_RX_COMPLETE (u_int16_t) (ACK_INTR|0x10)
228 # define C_RX_EARLY (u_int16_t) (ACK_INTR|0x20)
229 # define C_INT_RQD (u_int16_t) (ACK_INTR|0x40)
230 # define C_UPD_STATS (u_int16_t) (ACK_INTR|0x80)
231
232 #define SET_INTR_MASK (u_int16_t) (0x0e<<11)
233
234 /* busmastering-cards only? */
235 #define STATUS_ENABLE (u_int16_t) (0xf<<11)
236
237 #define SET_RD_0_MASK (u_int16_t) (0x0f<<11)
238
239 #define SET_RX_FILTER (u_int16_t) (0x10<<11)
240 # define FIL_INDIVIDUAL (u_int16_t) (0x01)
241 # define FIL_MULTICAST (u_int16_t) (0x02)
242 # define FIL_BRDCST (u_int16_t) (0x04)
243 # define FIL_PROMISC (u_int16_t) (0x08)
244
245 #define SET_RX_EARLY_THRESH (u_int16_t) (0x11<<11)
246 #define SET_TX_AVAIL_THRESH (u_int16_t) (0x12<<11)
247 #define SET_TX_START_THRESH (u_int16_t) (0x13<<11)
248 #define START_DMA (u_int16_t) (0x14<<11) /* busmaster-only */
249 # define START_DMA_TX (START_DMA | 0x0)) /* busmaster-only */
250 # define START_DMA_RX (START_DMA | 0x1) /* busmaster-only */
251 #define STATS_ENABLE (u_int16_t) (0x15<<11)
252 #define STATS_DISABLE (u_int16_t) (0x16<<11)
253 #define STOP_TRANSCEIVER (u_int16_t) (0x17<<11)
254
255 /* Only on adapters that support power management: */
256 #define POWERUP (u_int16_t) (0x1b<<11)
257 #define POWERDOWN (u_int16_t) (0x1c<<11)
258 #define POWERAUTO (u_int16_t) (0x1d<<11)
259
260
261
262 /*
263 * Command parameter that disables threshold interrupts
264 * PIO (3c509) cards use 2044. The fifo word-oriented and 2044--2047 work.
265 * "busmastering" cards need 8188.
266 * The implicit two-bit upshift done by busmastering cards means
267 * a value of 2047 disables threshold interrupts on both.
268 */
269 #define ELINK_THRESH_DISABLE 2047
270
271
272 /*
273 * Status register. All windows.
274 *
275 * 15-13: Window number(0-7).
276 * 12: Command_in_progress.
277 * 11: reserved / DMA in progress on busmaster cards.
278 * 10: reserved.
279 * 9: reserved.
280 * 8: reserved / DMA done on busmaster cards.
281 * 7: Update Statistics.
282 * 6: Interrupt Requested.
283 * 5: RX Early.
284 * 4: RX Complete.
285 * 3: TX Available.
286 * 2: TX Complete.
287 * 1: Adapter Failure.
288 * 0: Interrupt Latch.
289 */
290 #define S_INTR_LATCH (u_int16_t) (0x0001)
291 #define S_CARD_FAILURE (u_int16_t) (0x0002)
292 #define S_TX_COMPLETE (u_int16_t) (0x0004)
293 #define S_TX_AVAIL (u_int16_t) (0x0008)
294 #define S_RX_COMPLETE (u_int16_t) (0x0010)
295 #define S_RX_EARLY (u_int16_t) (0x0020)
296 #define S_INT_RQD (u_int16_t) (0x0040)
297 #define S_UPD_STATS (u_int16_t) (0x0080)
298 #define S_DMA_DONE (u_int16_t) (0x0100) /* DMA cards only */
299 #define S_DMA_IN_PROGRESS (u_int16_t) (0x0800) /* DMA cards only */
300 #define S_COMMAND_IN_PROGRESS (u_int16_t) (0x1000)
301
302 /*
303 * FIFO Registers. RX Status.
304 *
305 * 15: Incomplete or FIFO empty.
306 * 14: 1: Error in RX Packet 0: Incomplete or no error.
307 * 14-11: Type of error. [14-11]
308 * 1000 = Overrun.
309 * 1011 = Run Packet Error.
310 * 1100 = Alignment Error.
311 * 1101 = CRC Error.
312 * 1001 = Oversize Packet Error (>1514 bytes)
313 * 0010 = Dribble Bits.
314 * (all other error codes, no errors.)
315 *
316 * 10-0: RX Bytes (0-1514)
317 */
318 #define ERR_INCOMPLETE (u_int16_t) (0x8000)
319 #define ERR_RX (u_int16_t) (0x4000)
320 #define ERR_MASK (u_int16_t) (0x7800)
321 #define ERR_OVERRUN (u_int16_t) (0x4000)
322 #define ERR_RUNT (u_int16_t) (0x5800)
323 #define ERR_ALIGNMENT (u_int16_t) (0x6000)
324 #define ERR_CRC (u_int16_t) (0x6800)
325 #define ERR_OVERSIZE (u_int16_t) (0x4800)
326 #define ERR_DRIBBLE (u_int16_t) (0x1000)
327
328 /*
329 * TX Status
330 *
331 * Reports the transmit status of a completed transmission. Writing this
332 * register pops the transmit completion stack.
333 *
334 * Window 1/Port 0x0b.
335 *
336 * 7: Complete
337 * 6: Interrupt on successful transmission requested.
338 * 5: Jabber Error (TP Only, TX Reset required. )
339 * 4: Underrun (TX Reset required. )
340 * 3: Maximum Collisions.
341 * 2: TX Status Overflow.
342 * 1-0: Undefined.
343 *
344 */
345 #define TXS_COMPLETE 0x80
346 #define TXS_INTR_REQ 0x40
347 #define TXS_JABBER 0x20
348 #define TXS_UNDERRUN 0x10
349 #define TXS_MAX_COLLISION 0x08
350 #define TXS_STATUS_OVERFLOW 0x04
351
352 /*
353 * RX status
354 * Window 1/Port 0x08.
355 */
356 #define RX_BYTES_MASK (u_int16_t) (0x07ff)
357
358 /*
359 * Internal Config and MAC control (Window 3)
360 * Window 3 / Port 0: 32-bit internal config register:
361 * bits 0-2: fifo buffer ram size
362 * 3: ram width (word/byte) (ro)
363 * 4-5: ram speed
364 * 6-7: rom size
365 * 8-15: reserved
366 *
367 * 16-17: ram split (5:3, 3:1, or 1:1).
368 * 18-19: reserved
369 * 20-22: selected media type
370 * 21: unused
371 * 24: (nonvolatile) driver should autoselect media
372 * 25-31: reseerved
373 *
374 * The low-order 16 bits should generally not be changed by software.
375 * Offsets defined for two 16-bit words, to help out 16-bit busses.
376 */
377 #define CONFIG_RAMSIZE (u_int16_t) 0x0007
378 #define CONFIG_RAMSIZE_SHIFT 0
379
380 #define CONFIG_RAMWIDTH (u_int16_t) 0x0008
381 #define CONFIG_RAMWIDTH_SHIFT 3
382
383 #define CONFIG_RAMSPEED (u_int16_t) 0x0030
384 #define CONFIG_RAMSPEED_SHIFT 4
385 #define CONFIG_ROMSIZE (u_int16_t) 0x00c0
386 #define CONFIG_ROMSIZE_SHIFT 6
387
388 /* Window 3/port 2 */
389 #define CONFIG_RAMSPLIT (u_int16_t) 0x0003
390 #define CONFIG_RAMSPLIT_SHIFT 0
391 #define CONFIG_MEDIAMASK (u_int16_t) 0x0070
392 #define CONFIG_MEDIAMASK_SHIFT 4
393
394 #define CONFIG_AUTOSELECT (u_int16_t) 0x0100
395 #define CONFIG_AUTOSELECT_SHIFT 8
396
397 /*
398 * MAC_CONTROL (Window 3)
399 */
400 #define MAC_CONTROL_FDX 0x20 /* full-duplex mode */
401
402
403 /* Active media in INTERNAL_CONFIG media bits */
404
405 #define ELINKMEDIA_10BASE_T (u_int16_t) 0x00
406 #define ELINKMEDIA_AUI (u_int16_t) 0x01
407 #define ELINKMEDIA_RESV1 (u_int16_t) 0x02
408 #define ELINKMEDIA_10BASE_2 (u_int16_t) 0x03
409 #define ELINKMEDIA_100BASE_TX (u_int16_t) 0x04
410 #define ELINKMEDIA_100BASE_FX (u_int16_t) 0x05
411 #define ELINKMEDIA_MII (u_int16_t) 0x06
412 #define ELINKMEDIA_100BASE_T4 (u_int16_t) 0x07
413
414
415 /*
416 * RESET_OPTIONS (Window 3, on Demon/Vortex/Bomerang only)
417 * also mapped to PCI configuration space on PCI adaptors.
418 *
419 * (same register as Vortex ELINK_W3_RESET_OPTIONS, mapped to pci-config space)
420 */
421 #define ELINK_PCI_100BASE_T4 (1<<0)
422 #define ELINK_PCI_100BASE_TX (1<<1)
423 #define ELINK_PCI_100BASE_FX (1<<2)
424 #define ELINK_PCI_10BASE_T (1<<3)
425 #define ELINK_PCI_BNC (1<<4)
426 #define ELINK_PCI_AUI (1<<5)
427 #define ELINK_PCI_100BASE_MII (1<<6)
428 #define ELINK_PCI_INTERNAL_VCO (1<<8)
429
430 #define ELINK_PCI_MEDIAMASK (ELINK_PCI_100BASE_T4|ELINK_PCI_100BASE_TX| \
431 ELINK_PCI_100BASE_FX|ELINK_PCI_10BASE_T| \
432 ELINK_PCI_BNC|ELINK_PCI_AUI| \
433 ELINK_PCI_100BASE_MII)
434
435 #define ELINK_RUNNER_MII_RESET 0x4000
436 #define ELINK_RUNNER_ENABLE_MII 0x8000
437
438 /*
439 * FIFO Status (Window 4)
440 *
441 * Supports FIFO diagnostics
442 *
443 * Window 4/Port 0x04.1
444 *
445 * 15: 1=RX receiving (RO). Set when a packet is being received
446 * into the RX FIFO.
447 * 14: Reserved
448 * 13: 1=RX underrun (RO). Generates Adapter Failure interrupt.
449 * Requires RX Reset or Global Reset command to recover.
450 * It is generated when you read past the end of a packet -
451 * reading past what has been received so far will give bad
452 * data.
453 * 12: 1=RX status overrun (RO). Set when there are already 8
454 * packets in the RX FIFO. While this bit is set, no additional
455 * packets are received. Requires no action on the part of
456 * the host. The condition is cleared once a packet has been
457 * read out of the RX FIFO.
458 * 11: 1=RX overrun (RO). Set when the RX FIFO is full (there
459 * may not be an overrun packet yet). While this bit is set,
460 * no additional packets will be received (some additional
461 * bytes can still be pending between the wire and the RX
462 * FIFO). Requires no action on the part of the host. The
463 * condition is cleared once a few bytes have been read out
464 * from the RX FIFO.
465 * 10: 1=TX overrun (RO). Generates adapter failure interrupt.
466 * Requires TX Reset or Global Reset command to recover.
467 * Disables Transmitter.
468 * 9-8: Unassigned.
469 * 7-0: Built in self test bits for the RX and TX FIFO's.
470 */
471 #define FIFOS_RX_RECEIVING (u_int16_t) 0x8000
472 #define FIFOS_RX_UNDERRUN (u_int16_t) 0x2000
473 #define FIFOS_RX_STATUS_OVERRUN (u_int16_t) 0x1000
474 #define FIFOS_RX_OVERRUN (u_int16_t) 0x0800
475 #define FIFOS_TX_OVERRUN (u_int16_t) 0x0400
476
477 /*
478 * ISA/eisa CONFIG_CNTRL media-present bits.
479 */
480 #define ELINK_W0_CC_AUI (1<<13)
481 #define ELINK_W0_CC_BNC (1<<12)
482 #define ELINK_W0_CC_UTP (1<<9)
483 #define ELINK_W0_CC_MEDIAMASK (ELINK_W0_CC_AUI|ELINK_W0_CC_BNC| \
484 ELINK_W0_CC_UTP)
485
486 /* EEPROM state flags/commands */
487 #define EEPROM_BUSY (1<<15)
488 #define EEPROM_TST_MODE (1<<14)
489
490 #define READ_EEPROM (1<<7)
491
492 /* For the RoadRunner chips... */
493 #define WRITE_EEPROM_RR 0x100
494 #define READ_EEPROM_RR 0x200
495 #define ERASE_EEPROM_RR 0x300
496
497 /* window 4, MEDIA_STATUS bits */
498 #define SQE_ENABLE 0x08 /* Enables SQE on AUI ports */
499 #define JABBER_GUARD_ENABLE 0x40
500 #define LINKBEAT_ENABLE 0x80
501 #define DISABLE_UTP 0x0
502 #define LINKBEAT_DETECT 0x800
503
504 /*
505 * Misc defines for various things.
506 */
507 #define TAG_ADAPTER 0xd0
508 #define ACTIVATE_ADAPTER_TO_CONFIG 0xff
509 #define ENABLE_DRQ_IRQ 0x0001
510 #define MFG_ID 0x506d /* `TCM' */
511 #define PROD_ID_3C509 0x5090 /* 509[0-f] */
512 #define GO_WINDOW(x) bus_space_write_2(sc->sc_iot, \
513 sc->sc_ioh, ELINK_COMMAND, WINDOW_SELECT|x)
514
515
516 /* Used to probe for large-packet support. */
517 #define ELINK_LARGEWIN_PROBE ELINK_THRESH_DISABLE
518 #define ELINK_LARGEWIN_MASK 0xffc
519