aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/sunhme.h
blob: 64f278360d892e4415e767f77fdc11e5e92f65dc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
/* $Id: sunhme.h,v 1.33 2001/08/03 06:23:04 davem Exp $
 * sunhme.h: Definitions for Sparc HME/BigMac 10/100baseT ethernet driver.
 *           Also known as the "Happy Meal".
 *
 * Copyright (C) 1996, 1999 David S. Miller (davem@redhat.com)
 */

#ifndef _SUNHME_H
#define _SUNHME_H

#include <linux/pci.h>

/* Happy Meal global registers. */
#define GREG_SWRESET	0x000UL	/* Software Reset  */
#define GREG_CFG	0x004UL	/* Config Register */
#define GREG_STAT	0x108UL	/* Status          */
#define GREG_IMASK	0x10cUL	/* Interrupt Mask  */
#define GREG_REG_SIZE	0x110UL

/* Global reset register. */
#define GREG_RESET_ETX         0x01
#define GREG_RESET_ERX         0x02
#define GREG_RESET_ALL         0x03

/* Global config register. */
#define GREG_CFG_BURSTMSK      0x03
#define GREG_CFG_BURST16       0x00
#define GREG_CFG_BURST32       0x01
#define GREG_CFG_BURST64       0x02
#define GREG_CFG_64BIT         0x04
#define GREG_CFG_PARITY        0x08
#define GREG_CFG_RESV          0x10

/* Global status register. */
#define GREG_STAT_GOTFRAME     0x00000001 /* Received a frame                         */
#define GREG_STAT_RCNTEXP      0x00000002 /* Receive frame counter expired            */
#define GREG_STAT_ACNTEXP      0x00000004 /* Align-error counter expired              */
#define GREG_STAT_CCNTEXP      0x00000008 /* CRC-error counter expired                */
#define GREG_STAT_LCNTEXP      0x00000010 /* Length-error counter expired             */
#define GREG_STAT_RFIFOVF      0x00000020 /* Receive FIFO overflow                    */
#define GREG_STAT_CVCNTEXP     0x00000040 /* Code-violation counter expired           */
#define GREG_STAT_STSTERR      0x00000080 /* Test error in XIF for SQE                */
#define GREG_STAT_SENTFRAME    0x00000100 /* Transmitted a frame                      */
#define GREG_STAT_TFIFO_UND    0x00000200 /* Transmit FIFO underrun                   */
#define GREG_STAT_MAXPKTERR    0x00000400 /* Max-packet size error                    */
#define GREG_STAT_NCNTEXP      0x00000800 /* Normal-collision counter expired         */
#define GREG_STAT_ECNTEXP      0x00001000 /* Excess-collision counter expired         */
#define GREG_STAT_LCCNTEXP     0x00002000 /* Late-collision counter expired           */
#define GREG_STAT_FCNTEXP      0x00004000 /* First-collision counter expired          */
#define GREG_STAT_DTIMEXP      0x00008000 /* Defer-timer expired                      */
#define GREG_STAT_RXTOHOST     0x00010000 /* Moved from receive-FIFO to host memory   */
#define GREG_STAT_NORXD        0x00020000 /* No more receive descriptors              */
#define GREG_STAT_RXERR        0x00040000 /* Error during receive dma                 */
#define GREG_STAT_RXLATERR     0x00080000 /* Late error during receive dma            */
#define GREG_STAT_RXPERR       0x00100000 /* Parity error during receive dma          */
#define GREG_STAT_RXTERR       0x00200000 /* Tag error during receive dma             */
#define GREG_STAT_EOPERR       0x00400000 /* Transmit descriptor did not have EOP set */
#define GREG_STAT_MIFIRQ       0x00800000 /* MIF is signaling an interrupt condition  */
#define GREG_STAT_HOSTTOTX     0x01000000 /* Moved from host memory to transmit-FIFO  */
#define GREG_STAT_TXALL        0x02000000 /* Transmitted all packets in the tx-fifo   */
#define GREG_STAT_TXEACK       0x04000000 /* Error during transmit dma                */
#define GREG_STAT_TXLERR       0x08000000 /* Late error during transmit dma           */
#define GREG_STAT_TXPERR       0x10000000 /* Parity error during transmit dma         */
#define GREG_STAT_TXTERR       0x20000000 /* Tag error during transmit dma            */
#define GREG_STAT_SLVERR       0x40000000 /* PIO access got an error                  */
#define GREG_STAT_SLVPERR      0x80000000 /* PIO access got a parity error            */

/* All interesting error conditions. */
#define GREG_STAT_ERRORS       0xfc7efefc

/* Global interrupt mask register. */
#define GREG_IMASK_GOTFRAME    0x00000001 /* Received a frame                         */
#define GREG_IMASK_RCNTEXP     0x00000002 /* Receive frame counter expired            */
#define GREG_IMASK_ACNTEXP     0x00000004 /* Align-error counter expired              */
#define GREG_IMASK_CCNTEXP     0x00000008 /* CRC-error counter expired                */
#define GREG_IMASK_LCNTEXP     0x00000010 /* Length-error counter expired             */
#define GREG_IMASK_RFIFOVF     0x00000020 /* Receive FIFO overflow                    */
#define GREG_IMASK_CVCNTEXP    0x00000040 /* Code-violation counter expired           */
#define GREG_IMASK_STSTERR     0x00000080 /* Test error in XIF for SQE                */
#define GREG_IMASK_SENTFRAME   0x00000100 /* Transmitted a frame                      */
#define GREG_IMASK_TFIFO_UND   0x00000200 /* Transmit FIFO underrun                   */
#define GREG_IMASK_MAXPKTERR   0x00000400 /* Max-packet size error                    */
#define GREG_IMASK_NCNTEXP     0x00000800 /* Normal-collision counter expired         */
#define GREG_IMASK_ECNTEXP     0x00001000 /* Excess-collision counter expired         */
#define GREG_IMASK_LCCNTEXP    0x00002000 /* Late-collision counter expired           */
#define GREG_IMASK_FCNTEXP     0x00004000 /* First-collision counter expired          */
#define GREG_IMASK_DTIMEXP     0x00008000 /* Defer-timer expired                      */
#define GREG_IMASK_RXTOHOST    0x00010000 /* Moved from receive-FIFO to host memory   */
#define GREG_IMASK_NORXD       0x00020000 /* No more receive descriptors              */
#define GREG_IMASK_RXERR       0x00040000 /* Error during receive dma                 */
#define GREG_IMASK_RXLATERR    0x00080000 /* Late error during receive dma            */
#define GREG_IMASK_RXPERR      0x00100000 /* Parity error during receive dma          */
#define GREG_IMASK_RXTERR      0x00200000 /* Tag error during receive dma             */
#define GREG_IMASK_EOPERR      0x00400000 /* Transmit descriptor did not have EOP set */
#define GREG_IMASK_MIFIRQ      0x00800000 /* MIF is signaling an interrupt condition  */
#define GREG_IMASK_HOSTTOTX    0x01000000 /* Moved from host memory to transmit-FIFO  */
#define GREG_IMASK_TXALL       0x02000000 /* Transmitted all packets in the tx-fifo   */
#define GREG_IMASK_TXEACK      0x04000000 /* Error during transmit dma                */
#define GREG_IMASK_TXLERR      0x08000000 /* Late error during transmit dma           */
#define GREG_IMASK_TXPERR      0x10000000 /* Parity error during transmit dma         */
#define GREG_IMASK_TXTERR      0x20000000 /* Tag error during transmit dma            */
#define GREG_IMASK_SLVERR      0x40000000 /* PIO access got an error                  */
#define GREG_IMASK_SLVPERR     0x80000000 /* PIO access got a parity error            */

/* Happy Meal external transmitter registers. */
#define ETX_PENDING	0x00UL	/* Transmit pending/wakeup register */
#define ETX_CFG		0x04UL	/* Transmit config register         */
#define ETX_RING	0x08UL	/* Transmit ring pointer            */
#define ETX_BBASE	0x0cUL	/* Transmit buffer base             */
#define ETX_BDISP	0x10UL	/* Transmit buffer displacement     */
#define ETX_FIFOWPTR	0x14UL	/* FIFO write ptr                   */
#define ETX_FIFOSWPTR	0x18UL	/* FIFO write ptr (shadow register) */
#define ETX_FIFORPTR	0x1cUL	/* FIFO read ptr                    */
#define ETX_FIFOSRPTR	0x20UL	/* FIFO read ptr (shadow register)  */
#define ETX_FIFOPCNT	0x24UL	/* FIFO packet counter              */
#define ETX_SMACHINE	0x28UL	/* Transmitter state machine        */
#define ETX_RSIZE	0x2cUL	/* Ring descriptor size             */
#define ETX_BPTR	0x30UL	/* Transmit data buffer ptr         */
#define ETX_REG_SIZE	0x34UL

/* ETX transmit pending register. */
#define ETX_TP_DMAWAKEUP         0x00000001 /* Restart transmit dma             */

/* ETX config register. */
#define ETX_CFG_DMAENABLE        0x00000001 /* Enable transmit dma              */
#define ETX_CFG_FIFOTHRESH       0x000003fe /* Transmit FIFO threshold          */
#define ETX_CFG_IRQDAFTER        0x00000400 /* Interrupt after TX-FIFO drained  */
#define ETX_CFG_IRQDBEFORE       0x00000000 /* Interrupt before TX-FIFO drained */

#define ETX_RSIZE_SHIFT          4

/* Happy Meal external receiver registers. */
#define ERX_CFG		0x00UL	/* Receiver config register         */
#define ERX_RING	0x04UL	/* Receiver ring ptr                */
#define ERX_BPTR	0x08UL	/* Receiver buffer ptr              */
#define ERX_FIFOWPTR	0x0cUL	/* FIFO write ptr                   */
#define ERX_FIFOSWPTR	0x10UL	/* FIFO write ptr (shadow register) */
#define ERX_FIFORPTR	0x14UL	/* FIFO read ptr                    */
#define ERX_FIFOSRPTR	0x18UL	/* FIFO read ptr (shadow register)  */
#define ERX_SMACHINE	0x1cUL	/* Receiver state machine           */
#define ERX_REG_SIZE	0x20UL

/* ERX config register. */
#define ERX_CFG_DMAENABLE    0x00000001 /* Enable receive DMA        */
#define ERX_CFG_RESV1        0x00000006 /* Unused...                 */
#define ERX_CFG_BYTEOFFSET   0x00000038 /* Receive first byte offset */
#define ERX_CFG_RESV2        0x000001c0 /* Unused...                 */
#define ERX_CFG_SIZE32       0x00000000 /* Receive ring size == 32   */
#define ERX_CFG_SIZE64       0x00000200 /* Receive ring size == 64   */
#define ERX_CFG_SIZE128      0x00000400 /* Receive ring size == 128  */
#define ERX_CFG_SIZE256      0x00000600 /* Receive ring size == 256  */
#define ERX_CFG_RESV3        0x0000f800 /* Unused...                 */
#define ERX_CFG_CSUMSTART    0x007f0000 /* Offset of checksum start,
					 * in halfwords. */

/* I'd like a Big Mac, small fries, small coke, and SparcLinux please. */
#define BMAC_XIFCFG	0x0000UL	/* XIF config register                */
	/* 0x4-->0x204, reserved */
#define BMAC_TXSWRESET	0x208UL	/* Transmitter software reset         */
#define BMAC_TXCFG	0x20cUL	/* Transmitter config register        */
#define BMAC_IGAP1	0x210UL	/* Inter-packet gap 1                 */
#define BMAC_IGAP2	0x214UL	/* Inter-packet gap 2                 */
#define BMAC_ALIMIT	0x218UL	/* Transmit attempt limit             */
#define BMAC_STIME	0x21cUL	/* Transmit slot time                 */
#define BMAC_PLEN	0x220UL	/* Size of transmit preamble          */
#define BMAC_PPAT	0x224UL	/* Pattern for transmit preamble      */
#define BMAC_TXSDELIM	0x228UL	/* Transmit delimiter                 */
#define BMAC_JSIZE	0x22cUL	/* Jam size                           */
#define BMAC_TXMAX	0x230UL	/* Transmit max pkt size              */
#define BMAC_TXMIN	0x234UL	/* Transmit min pkt size              */
#define BMAC_PATTEMPT	0x238UL	/* Count of transmit peak attempts    */
#define BMAC_DTCTR	0x23cUL	/* Transmit defer timer               */
#define BMAC_NCCTR	0x240UL	/* Transmit normal-collision counter  */
#define BMAC_FCCTR	0x244UL	/* Transmit first-collision counter   */
#define BMAC_EXCTR	0x248UL	/* Transmit excess-collision counter  */
#define BMAC_LTCTR	0x24cUL	/* Transmit late-collision counter    */
#define BMAC_RSEED	0x250UL	/* Transmit random number seed        */
#define BMAC_TXSMACHINE	0x254UL	/* Transmit state machine             */
	/* 0x258-->0x304, reserved */
#define BMAC_RXSWRESET	0x308UL	/* Receiver software reset            */
#define BMAC_RXCFG	0x30cUL	/* Receiver config register           */
#define BMAC_RXMAX	0x310UL	/* Receive max pkt size               */
#define BMAC_RXMIN	0x314UL	/* Receive min pkt size               */
#define BMAC_MACADDR2	0x318UL	/* Ether address register 2           */
#define BMAC_MACADDR1	0x31cUL	/* Ether address register 1           */
#define BMAC_MACADDR0	0x320UL	/* Ether address register 0           */
#define BMAC_FRCTR	0x324UL	/* Receive frame receive counter      */
#define BMAC_GLECTR	0x328UL	/* Receive giant-length error counter */
#define BMAC_UNALECTR	0x32cUL	/* Receive unaligned error counter    */
#define BMAC_RCRCECTR	0x330UL	/* Receive CRC error counter          */
#define BMAC_RXSMACHINE	0x334UL	/* Receiver state machine             */
#define BMAC_RXCVALID	0x338UL	/* Receiver code violation            */
	/* 0x33c, reserved */
#define BMAC_HTABLE3	0x340UL	/* Hash table 3                       */
#define BMAC_HTABLE2	0x344UL	/* Hash table 2                       */
#define BMAC_HTABLE1	0x348UL	/* Hash table 1                       */
#define BMAC_HTABLE0	0x34cUL	/* Hash table 0                       */
#define BMAC_AFILTER2	0x350UL	/* Address filter 2                   */
#define BMAC_AFILTER1	0x354UL	/* Address filter 1                   */
#define BMAC_AFILTER0	0x358UL	/* Address filter 0                   */
#define BMAC_AFMASK	0x35cUL	/* Address filter mask                */
#define BMAC_REG_SIZE	0x360UL

/* BigMac XIF config register. */
#define BIGMAC_XCFG_ODENABLE  0x00000001 /* Output driver enable         */
#define BIGMAC_XCFG_XLBACK    0x00000002 /* Loopback-mode XIF enable     */
#define BIGMAC_XCFG_MLBACK    0x00000004 /* Loopback-mode MII enable     */
#define BIGMAC_XCFG_MIIDISAB  0x00000008 /* MII receive buffer disable   */
#define BIGMAC_XCFG_SQENABLE  0x00000010 /* SQE test enable              */
#define BIGMAC_XCFG_SQETWIN   0x000003e0 /* SQE time window              */
#define BIGMAC_XCFG_LANCE     0x00000010 /* Lance mode enable            */
#define BIGMAC_XCFG_LIPG0     0x000003e0 /* Lance mode IPG0              */

/* BigMac transmit config register. */
#define BIGMAC_TXCFG_ENABLE   0x00000001 /* Enable the transmitter       */
#define BIGMAC_TXCFG_SMODE    0x00000020 /* Enable slow transmit mode    */
#define BIGMAC_TXCFG_CIGN     0x00000040 /* Ignore transmit collisions   */
#define BIGMAC_TXCFG_FCSOFF   0x00000080 /* Do not emit FCS              */
#define BIGMAC_TXCFG_DBACKOFF 0x00000100 /* Disable backoff              */
#define BIGMAC_TXCFG_FULLDPLX 0x00000200 /* Enable full-duplex           */
#define BIGMAC_TXCFG_DGIVEUP  0x00000400 /* Don't give up on transmits   */

/* BigMac receive config register. */
#define BIGMAC_RXCFG_ENABLE   0x00000001 /* Enable the receiver             */
#define BIGMAC_RXCFG_PSTRIP   0x00000020 /* Pad byte strip enable           */
#define BIGMAC_RXCFG_PMISC    0x00000040 /* Enable promiscuous mode          */
#define BIGMAC_RXCFG_DERR     0x00000080 /* Disable error checking          */
#define BIGMAC_RXCFG_DCRCS    0x00000100 /* Disable CRC stripping           */
#define BIGMAC_RXCFG_REJME    0x00000200 /* Reject packets addressed to me  */
#define BIGMAC_RXCFG_PGRP     0x00000400 /* Enable promisc group mode       */
#define BIGMAC_RXCFG_HENABLE  0x00000800 /* Enable the hash filter          */
#define BIGMAC_RXCFG_AENABLE  0x00001000 /* Enable the address filter       */

/* These are the "Management Interface" (ie. MIF) registers of the transceiver. */
#define TCVR_BBCLOCK	0x00UL	/* Bit bang clock register          */
#define TCVR_BBDATA	0x04UL	/* Bit bang data register           */
#define TCVR_BBOENAB	0x08UL	/* Bit bang output enable           */
#define TCVR_FRAME	0x0cUL	/* Frame control/data register      */
#define TCVR_CFG	0x10UL	/* MIF config register              */
#define TCVR_IMASK	0x14UL	/* MIF interrupt mask               */
#define TCVR_STATUS	0x18UL	/* MIF status                       */
#define TCVR_SMACHINE	0x1cUL	/* MIF state machine                */
#define TCVR_REG_SIZE	0x20UL

/* Frame commands. */
#define FRAME_WRITE           0x50020000
#define FRAME_READ            0x60020000

/* Transceiver config register */
#define TCV_CFG_PSELECT       0x00000001 /* Select PHY                      */
#define TCV_CFG_PENABLE       0x00000002 /* Enable MIF polling              */
#define TCV_CFG_BENABLE       0x00000004 /* Enable the "bit banger" oh baby */
#define TCV_CFG_PREGADDR      0x000000f8 /* Address of poll register        */
#define TCV_CFG_MDIO0         0x00000100 /* MDIO zero, data/attached        */
#define TCV_CFG_MDIO1         0x00000200 /* MDIO one,  data/attached        */
#define TCV_CFG_PDADDR        0x00007c00 /* Device PHY address polling      */

/* Here are some PHY addresses. */
#define TCV_PADDR_ETX         0          /* Internal transceiver            */
#define TCV_PADDR_ITX         1          /* External transceiver            */

/* Transceiver status register */
#define TCV_STAT_BASIC        0xffff0000 /* The "basic" part                */
#define TCV_STAT_NORMAL       0x0000ffff /* The "non-basic" part            */

/* Inside the Happy Meal transceiver is the physical layer, they use an
 * implementations for National Semiconductor, part number DP83840VCE.
 * You can retrieve the data sheets and programming docs for this beast
 * from http://www.national.com/
 *
 * The DP83840 is capable of both 10 and 100Mbps ethernet, in both
 * half and full duplex mode.  It also supports auto negotiation.
 *
 * But.... THIS THING IS A PAIN IN THE ASS TO PROGRAM!
 * Debugging eeprom burnt code is more fun than programming this chip!
 */

/* Generic MII registers defined in linux/mii.h, these below
 * are DP83840 specific.
 */
#define DP83840_CSCONFIG        0x17        /* CS configuration            */

/* The Carrier Sense config register. */
#define CSCONFIG_RESV1          0x0001  /* Unused...                   */
#define CSCONFIG_LED4           0x0002  /* Pin for full-dplx LED4      */
#define CSCONFIG_LED1           0x0004  /* Pin for conn-status LED1    */
#define CSCONFIG_RESV2          0x0008  /* Unused...                   */
#define CSCONFIG_TCVDISAB       0x0010  /* Turns off the transceiver   */
#define CSCONFIG_DFBYPASS       0x0020  /* Bypass disconnect function  */
#define CSCONFIG_GLFORCE        0x0040  /* Good link force for 100mbps */
#define CSCONFIG_CLKTRISTATE    0x0080  /* Tristate 25m clock          */
#define CSCONFIG_RESV3          0x0700  /* Unused...                   */
#define CSCONFIG_ENCODE         0x0800  /* 1=MLT-3, 0=binary           */
#define CSCONFIG_RENABLE        0x1000  /* Repeater mode enable        */
#define CSCONFIG_TCDISABLE      0x2000  /* Disable timeout counter     */
#define CSCONFIG_RESV4          0x4000  /* Unused...                   */
#define CSCONFIG_NDISABLE       0x8000  /* Disable NRZI                */

/* Happy Meal descriptor rings and such.
 * All descriptor rings must be aligned on a 2K boundary.
 * All receive buffers must be 64 byte aligned.
 * Always write the address first before setting the ownership
 * bits to avoid races with the hardware scanning the ring.
 */
typedef u32 __bitwise__ hme32;

struct happy_meal_rxd {
	hme32 rx_flags;
	hme32 rx_addr;
};

#define RXFLAG_OWN         0x80000000 /* 1 = hardware, 0 = software */
#define RXFLAG_OVERFLOW    0x40000000 /* 1 = buffer overflow        */
#define RXFLAG_SIZE        0x3fff0000 /* Size of the buffer         */
#define RXFLAG_CSUM        0x0000ffff /* HW computed checksum       */

struct happy_meal_txd {
	hme32 tx_flags;
	hme32 tx_addr;
};

#define TXFLAG_OWN         0x80000000 /* 1 = hardware, 0 = software */
#define TXFLAG_SOP         0x40000000 /* 1 = start of packet        */
#define TXFLAG_EOP         0x20000000 /* 1 = end of packet          */
#define TXFLAG_CSENABLE    0x10000000 /* 1 = enable hw-checksums    */
#define TXFLAG_CSLOCATION  0x0ff00000 /* Where to stick the csum    */
#define TXFLAG_CSBUFBEGIN  0x000fc000 /* Where to begin checksum    */
#define TXFLAG_SIZE        0x00003fff /* Size of the packet         */

#define TX_RING_SIZE       32         /* Must be >16 and <255, multiple of 16  */
#define RX_RING_SIZE       32         /* see ERX_CFG_SIZE* for possible values */

#if (TX_RING_SIZE < 16 || TX_RING_SIZE > 256 || (TX_RING_SIZE % 16) != 0)
#error TX_RING_SIZE holds illegal value
#endif

#define TX_RING_MAXSIZE    256
#define RX_RING_MAXSIZE    256

/* We use a 14 byte offset for checksum computation. */
#if (RX_RING_SIZE == 32)
#define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE32|((14/2)<<16))
#else
#if (RX_RING_SIZE == 64)
#define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE64|((14/2)<<16))
#else
#if (RX_RING_SIZE == 128)
#define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE128|((14/2)<<16))
#else
#if (RX_RING_SIZE == 256)
#define ERX_CFG_DEFAULT(off) (ERX_CFG_DMAENABLE|((off)<<3)|ERX_CFG_SIZE256|((14/2)<<16))
#else
#error RX_RING_SIZE holds illegal value
#endif
#endif
#endif
#endif

#define NEXT_RX(num)       (((num) + 1) & (RX_RING_SIZE - 1))
#define NEXT_TX(num)       (((num) + 1) & (TX_RING_SIZE - 1))
#define PREV_RX(num)       (((num) - 1) & (RX_RING_SIZE - 1))
#define PREV_TX(num)       (((num) - 1) & (TX_RING_SIZE - 1))

#define TX_BUFFS_AVAIL(hp)                                    \
        (((hp)->tx_old <= (hp)->tx_new) ?                     \
	  (hp)->tx_old + (TX_RING_SIZE - 1) - (hp)->tx_new :  \
			    (hp)->tx_old - (hp)->tx_new - 1)

#define RX_OFFSET          2
#define RX_BUF_ALLOC_SIZE  (1546 + RX_OFFSET + 64)

#define RX_COPY_THRESHOLD  256

struct hmeal_init_block {
	struct happy_meal_rxd happy_meal_rxd[RX_RING_MAXSIZE];
	struct happy_meal_txd happy_meal_txd[TX_RING_MAXSIZE];
};

#define hblock_offset(mem, elem) \
((__u32)((unsigned long)(&(((struct hmeal_init_block *)0)->mem[elem]))))

/* Now software state stuff. */
enum happy_transceiver {
	external = 0,
	internal = 1,
	none     = 2,
};

/* Timer state engine. */
enum happy_timer_state {
	arbwait  = 0,  /* Waiting for auto negotiation to complete.          */
	lupwait  = 1,  /* Auto-neg complete, awaiting link-up status.        */
	ltrywait = 2,  /* Forcing try of all modes, from fastest to slowest. */
	asleep   = 3,  /* Time inactive.                                     */
};

struct quattro;

/* Happy happy, joy joy! */
struct happy_meal {
	void __iomem	*gregs;			/* Happy meal global registers       */
	struct hmeal_init_block  *happy_block;	/* RX and TX descriptors (CPU addr)  */

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	u32 (*read_desc32)(hme32 *);
	void (*write_txd)(struct happy_meal_txd *, u32, u32);
	void (*write_rxd)(struct happy_meal_rxd *, u32, u32);
#endif

	/* This is either an platform_device or a pci_dev. */
	void			  *happy_dev;
	struct device		  *dma_dev;

	spinlock_t		  happy_lock;

	struct sk_buff           *rx_skbs[RX_RING_SIZE];
	struct sk_buff           *tx_skbs[TX_RING_SIZE];

	int rx_new, tx_new, rx_old, tx_old;

	struct net_device_stats	  net_stats;      /* Statistical counters              */

#if defined(CONFIG_SBUS) && defined(CONFIG_PCI)
	u32 (*read32)(void __iomem *);
	void (*write32)(void __iomem *, u32);
#endif

	void __iomem	*etxregs;        /* External transmitter regs        */
	void __iomem	*erxregs;        /* External receiver regs           */
	void __iomem	*bigmacregs;     /* BIGMAC core regs		     */
	void __iomem	*tcvregs;        /* MIF transceiver regs             */

	dma_addr_t                hblock_dvma;    /* DVMA visible address happy block  */
	unsigned int              happy_flags;    /* Driver state flags                */
	enum happy_transceiver    tcvr_type;      /* Kind of transceiver in use        */
	unsigned int              happy_bursts;   /* Get your mind out of the gutter   */
	unsigned int              paddr;          /* PHY address for transceiver       */
	unsigned short            hm_revision;    /* Happy meal revision               */
	unsigned short            sw_bmcr;        /* SW copy of BMCR                   */
	unsigned short            sw_bmsr;        /* SW copy of BMSR                   */
	unsigned short            sw_physid1;     /* SW copy of PHYSID1                */
	unsigned short            sw_physid2;     /* SW copy of PHYSID2                */
	unsigned short            sw_advertise;   /* SW copy of ADVERTISE              */
	unsigned short            sw_lpa;         /* SW copy of LPA                    */
	unsigned short            sw_expansion;   /* SW copy of EXPANSION              */
	unsigned short            sw_csconfig;    /* SW copy of CSCONFIG               */
	unsigned int              auto_speed;     /* Auto-nego link speed              */
        unsigned int              forced_speed;   /* Force mode link speed             */
	unsigned int              poll_data;      /* MIF poll data                     */
	unsigned int              poll_flag;      /* MIF poll flag                     */
	unsigned int              linkcheck;      /* Have we checked the link yet?     */
	unsigned int              lnkup;          /* Is the link up as far as we know? */
	unsigned int              lnkdown;        /* Trying to force the link down?    */
	unsigned int              lnkcnt;         /* Counter for link-up attempts.     */
	struct timer_list         happy_timer;    /* To watch the link when coming up. */
	enum happy_timer_state    timer_state;    /* State of the auto-neg timer.      */
	unsigned int              timer_ticks;    /* Number of clicks at each state.   */

	struct net_device	 *dev;		/* Backpointer                       */
	struct quattro		 *qfe_parent;	/* For Quattro cards                 */
	int			  qfe_ent;	/* Which instance on quattro         */
};

/* Here are the happy flags. */
#define HFLAG_POLL                0x00000001      /* We are doing MIF polling          */
#define HFLAG_FENABLE             0x00000002      /* The MII frame is enabled          */
#define HFLAG_LANCE               0x00000004      /* We are using lance-mode           */
#define HFLAG_RXENABLE            0x00000008      /* Receiver is enabled               */
#define HFLAG_AUTO                0x00000010      /* Using auto-negotiation, 0 = force */
#define HFLAG_FULL                0x00000020      /* Full duplex enable                */
#define HFLAG_MACFULL             0x00000040      /* Using full duplex in the MAC      */
#define HFLAG_POLLENABLE          0x00000080      /* Actually try MIF polling          */
#define HFLAG_RXCV                0x00000100      /* XXX RXCV ENABLE                   */
#define HFLAG_INIT                0x00000200      /* Init called at least once         */
#define HFLAG_LINKUP              0x00000400      /* 1 = Link is up                    */
#define HFLAG_PCI                 0x00000800      /* PCI based Happy Meal              */
#define HFLAG_QUATTRO		  0x00001000      /* On QFE/Quattro card	       */

#define HFLAG_20_21  (HFLAG_POLLENABLE | HFLAG_FENABLE)
#define HFLAG_NOT_A0 (HFLAG_POLLENABLE | HFLAG_FENABLE | HFLAG_LANCE | HFLAG_RXCV)

/* Support for QFE/Quattro cards. */
struct quattro {
	struct net_device	*happy_meals[4];

	/* This is either a sbus_dev or a pci_dev. */
	void			*quattro_dev;

	struct quattro		*next;

	/* PROM ranges, if any. */
#ifdef CONFIG_SBUS
	struct linux_prom_ranges  ranges[8];
#endif
	int			  nranges;
};

/* We use this to acquire receive skb's that we can DMA directly into. */
#define ALIGNED_RX_SKB_ADDR(addr) \
        ((((unsigned long)(addr) + (64UL - 1UL)) & ~(64UL - 1UL)) - (unsigned long)(addr))
#define happy_meal_alloc_skb(__length, __gfp_flags) \
({	struct sk_buff *__skb; \
	__skb = alloc_skb((__length) + 64, (__gfp_flags)); \
	if(__skb) { \
		int __offset = (int) ALIGNED_RX_SKB_ADDR(__skb->data); \
		if(__offset) \
			skb_reserve(__skb, __offset); \
	} \
	__skb; \
})

#endif /* !(_SUNHME_H) */