1 /*        $NetBSD: elink3reg.h,v 1.31 2006/11/05 05:57:53 itohy Exp $ */
2 
3 /*
4  * Copyright (c) 1995 Herb Peyerl <hpeyerl@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