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1/*
2 * Helpfile for sonic.c
3 *
4 * (C) Waldorf Electronics, Germany
5 * Written by Andreas Busse
6 *
7 * NOTE: most of the structure definitions here are endian dependent.
8 * If you want to use this driver on big endian machines, the data
9 * and pad structure members must be exchanged. Also, the structures
10 * need to be changed accordingly to the bus size.
11 *
12 * 981229 MSch: did just that for the 68k Mac port (32 bit, big endian),
13 * see CONFIG_MACSONIC branch below.
14 *
15 */
16#ifndef SONIC_H
17#define SONIC_H
18
19#include <linux/config.h>
20
21/*
22 * SONIC register offsets
23 */
24
25#define SONIC_CMD 0x00
26#define SONIC_DCR 0x01
27#define SONIC_RCR 0x02
28#define SONIC_TCR 0x03
29#define SONIC_IMR 0x04
30#define SONIC_ISR 0x05
31
32#define SONIC_UTDA 0x06
33#define SONIC_CTDA 0x07
34
35#define SONIC_URDA 0x0d
36#define SONIC_CRDA 0x0e
37#define SONIC_EOBC 0x13
38#define SONIC_URRA 0x14
39#define SONIC_RSA 0x15
40#define SONIC_REA 0x16
41#define SONIC_RRP 0x17
42#define SONIC_RWP 0x18
43#define SONIC_RSC 0x2b
44
45#define SONIC_CEP 0x21
46#define SONIC_CAP2 0x22
47#define SONIC_CAP1 0x23
48#define SONIC_CAP0 0x24
49#define SONIC_CE 0x25
50#define SONIC_CDP 0x26
51#define SONIC_CDC 0x27
52
53#define SONIC_WT0 0x29
54#define SONIC_WT1 0x2a
55
56#define SONIC_SR 0x28
57
58
59/* test-only registers */
60
61#define SONIC_TPS 0x08
62#define SONIC_TFC 0x09
63#define SONIC_TSA0 0x0a
64#define SONIC_TSA1 0x0b
65#define SONIC_TFS 0x0c
66
67#define SONIC_CRBA0 0x0f
68#define SONIC_CRBA1 0x10
69#define SONIC_RBWC0 0x11
70#define SONIC_RBWC1 0x12
71#define SONIC_TTDA 0x20
72#define SONIC_MDT 0x2f
73
74#define SONIC_TRBA0 0x19
75#define SONIC_TRBA1 0x1a
76#define SONIC_TBWC0 0x1b
77#define SONIC_TBWC1 0x1c
78#define SONIC_LLFA 0x1f
79
80#define SONIC_ADDR0 0x1d
81#define SONIC_ADDR1 0x1e
82
83/*
84 * Error counters
85 */
86#define SONIC_CRCT 0x2c
87#define SONIC_FAET 0x2d
88#define SONIC_MPT 0x2e
89
90#define SONIC_DCR2 0x3f
91
92/*
93 * SONIC command bits
94 */
95
96#define SONIC_CR_LCAM 0x0200
97#define SONIC_CR_RRRA 0x0100
98#define SONIC_CR_RST 0x0080
99#define SONIC_CR_ST 0x0020
100#define SONIC_CR_STP 0x0010
101#define SONIC_CR_RXEN 0x0008
102#define SONIC_CR_RXDIS 0x0004
103#define SONIC_CR_TXP 0x0002
104#define SONIC_CR_HTX 0x0001
105
106/*
107 * SONIC data configuration bits
108 */
109
110#define SONIC_DCR_EXBUS 0x8000
111#define SONIC_DCR_LBR 0x2000
112#define SONIC_DCR_PO1 0x1000
113#define SONIC_DCR_PO0 0x0800
114#define SONIC_DCR_SBUS 0x0400
115#define SONIC_DCR_USR1 0x0200
116#define SONIC_DCR_USR0 0x0100
117#define SONIC_DCR_WC1 0x0080
118#define SONIC_DCR_WC0 0x0040
119#define SONIC_DCR_DW 0x0020
120#define SONIC_DCR_BMS 0x0010
121#define SONIC_DCR_RFT1 0x0008
122#define SONIC_DCR_RFT0 0x0004
123#define SONIC_DCR_TFT1 0x0002
124#define SONIC_DCR_TFT0 0x0001
125
126/*
127 * Constants for the SONIC receive control register.
128 */
129
130#define SONIC_RCR_ERR 0x8000
131#define SONIC_RCR_RNT 0x4000
132#define SONIC_RCR_BRD 0x2000
133#define SONIC_RCR_PRO 0x1000
134#define SONIC_RCR_AMC 0x0800
135#define SONIC_RCR_LB1 0x0400
136#define SONIC_RCR_LB0 0x0200
137
138#define SONIC_RCR_MC 0x0100
139#define SONIC_RCR_BC 0x0080
140#define SONIC_RCR_LPKT 0x0040
141#define SONIC_RCR_CRS 0x0020
142#define SONIC_RCR_COL 0x0010
143#define SONIC_RCR_CRCR 0x0008
144#define SONIC_RCR_FAER 0x0004
145#define SONIC_RCR_LBK 0x0002
146#define SONIC_RCR_PRX 0x0001
147
148#define SONIC_RCR_LB_OFF 0
149#define SONIC_RCR_LB_MAC SONIC_RCR_LB0
150#define SONIC_RCR_LB_ENDEC SONIC_RCR_LB1
151#define SONIC_RCR_LB_TRANS (SONIC_RCR_LB0 | SONIC_RCR_LB1)
152
153/* default RCR setup */
154
155#define SONIC_RCR_DEFAULT (SONIC_RCR_BRD)
156
157
158/*
159 * SONIC Transmit Control register bits
160 */
161
162#define SONIC_TCR_PINTR 0x8000
163#define SONIC_TCR_POWC 0x4000
164#define SONIC_TCR_CRCI 0x2000
165#define SONIC_TCR_EXDIS 0x1000
166#define SONIC_TCR_EXD 0x0400
167#define SONIC_TCR_DEF 0x0200
168#define SONIC_TCR_NCRS 0x0100
169#define SONIC_TCR_CRLS 0x0080
170#define SONIC_TCR_EXC 0x0040
171#define SONIC_TCR_PMB 0x0008
172#define SONIC_TCR_FU 0x0004
173#define SONIC_TCR_BCM 0x0002
174#define SONIC_TCR_PTX 0x0001
175
176#define SONIC_TCR_DEFAULT 0x0000
177
178/*
179 * Constants for the SONIC_INTERRUPT_MASK and
180 * SONIC_INTERRUPT_STATUS registers.
181 */
182
183#define SONIC_INT_BR 0x4000
184#define SONIC_INT_HBL 0x2000
185#define SONIC_INT_LCD 0x1000
186#define SONIC_INT_PINT 0x0800
187#define SONIC_INT_PKTRX 0x0400
188#define SONIC_INT_TXDN 0x0200
189#define SONIC_INT_TXER 0x0100
190#define SONIC_INT_TC 0x0080
191#define SONIC_INT_RDE 0x0040
192#define SONIC_INT_RBE 0x0020
193#define SONIC_INT_RBAE 0x0010
194#define SONIC_INT_CRC 0x0008
195#define SONIC_INT_FAE 0x0004
196#define SONIC_INT_MP 0x0002
197#define SONIC_INT_RFO 0x0001
198
199
200/*
201 * The interrupts we allow.
202 */
203
204#define SONIC_IMR_DEFAULT (SONIC_INT_BR | \
205 SONIC_INT_LCD | \
206 SONIC_INT_PINT | \
207 SONIC_INT_PKTRX | \
208 SONIC_INT_TXDN | \
209 SONIC_INT_TXER | \
210 SONIC_INT_RDE | \
211 SONIC_INT_RBE | \
212 SONIC_INT_RBAE | \
213 SONIC_INT_CRC | \
214 SONIC_INT_FAE | \
215 SONIC_INT_MP)
216
217
218#define SONIC_END_OF_LINKS 0x0001
219
220
221#ifdef CONFIG_MACSONIC
222/*
223 * Big endian like structures on 680x0 Macs
224 */
225
226typedef struct {
227 u32 rx_bufadr_l; /* receive buffer ptr */
228 u32 rx_bufadr_h;
229
230 u32 rx_bufsize_l; /* no. of words in the receive buffer */
231 u32 rx_bufsize_h;
232} sonic_rr_t;
233
234/*
235 * Sonic receive descriptor. Receive descriptors are
236 * kept in a linked list of these structures.
237 */
238
239typedef struct {
240 SREGS_PAD(pad0);
241 u16 rx_status; /* status after reception of a packet */
242 SREGS_PAD(pad1);
243 u16 rx_pktlen; /* length of the packet incl. CRC */
244
245 /*
246 * Pointers to the location in the receive buffer area (RBA)
247 * where the packet resides. A packet is always received into
248 * a contiguous piece of memory.
249 */
250 SREGS_PAD(pad2);
251 u16 rx_pktptr_l;
252 SREGS_PAD(pad3);
253 u16 rx_pktptr_h;
254
255 SREGS_PAD(pad4);
256 u16 rx_seqno; /* sequence no. */
257
258 SREGS_PAD(pad5);
259 u16 link; /* link to next RDD (end if EOL bit set) */
260
261 /*
262 * Owner of this descriptor, 0= driver, 1=sonic
263 */
264
265 SREGS_PAD(pad6);
266 u16 in_use;
267
268 caddr_t rda_next; /* pointer to next RD */
269} sonic_rd_t;
270
271
272/*
273 * Describes a Transmit Descriptor
274 */
275typedef struct {
276 SREGS_PAD(pad0);
277 u16 tx_status; /* status after transmission of a packet */
278 SREGS_PAD(pad1);
279 u16 tx_config; /* transmit configuration for this packet */
280 SREGS_PAD(pad2);
281 u16 tx_pktsize; /* size of the packet to be transmitted */
282 SREGS_PAD(pad3);
283 u16 tx_frag_count; /* no. of fragments */
284
285 SREGS_PAD(pad4);
286 u16 tx_frag_ptr_l;
287 SREGS_PAD(pad5);
288 u16 tx_frag_ptr_h;
289 SREGS_PAD(pad6);
290 u16 tx_frag_size;
291
292 SREGS_PAD(pad7);
293 u16 link; /* ptr to next descriptor */
294} sonic_td_t;
295
296
297/*
298 * Describes an entry in the CAM Descriptor Area.
299 */
300
301typedef struct {
302 SREGS_PAD(pad0);
303 u16 cam_entry_pointer;
304 SREGS_PAD(pad1);
305 u16 cam_cap0;
306 SREGS_PAD(pad2);
307 u16 cam_cap1;
308 SREGS_PAD(pad3);
309 u16 cam_cap2;
310} sonic_cd_t;
311
312#define CAM_DESCRIPTORS 16
313
314
315typedef struct {
316 sonic_cd_t cam_desc[CAM_DESCRIPTORS];
317 SREGS_PAD(pad);
318 u16 cam_enable;
319} sonic_cda_t;
320
321#else /* original declarations, little endian 32 bit */
322
323/*
324 * structure definitions
325 */
326
327typedef struct {
328 u32 rx_bufadr_l; /* receive buffer ptr */
329 u32 rx_bufadr_h;
330
331 u32 rx_bufsize_l; /* no. of words in the receive buffer */
332 u32 rx_bufsize_h;
333} sonic_rr_t;
334
335/*
336 * Sonic receive descriptor. Receive descriptors are
337 * kept in a linked list of these structures.
338 */
339
340typedef struct {
341 u16 rx_status; /* status after reception of a packet */
342 SREGS_PAD(pad0);
343 u16 rx_pktlen; /* length of the packet incl. CRC */
344 SREGS_PAD(pad1);
345
346 /*
347 * Pointers to the location in the receive buffer area (RBA)
348 * where the packet resides. A packet is always received into
349 * a contiguous piece of memory.
350 */
351 u16 rx_pktptr_l;
352 SREGS_PAD(pad2);
353 u16 rx_pktptr_h;
354 SREGS_PAD(pad3);
355
356 u16 rx_seqno; /* sequence no. */
357 SREGS_PAD(pad4);
358
359 u16 link; /* link to next RDD (end if EOL bit set) */
360 SREGS_PAD(pad5);
361
362 /*
363 * Owner of this descriptor, 0= driver, 1=sonic
364 */
365
366 u16 in_use;
367 SREGS_PAD(pad6);
368
369 caddr_t rda_next; /* pointer to next RD */
370} sonic_rd_t;
371
372
373/*
374 * Describes a Transmit Descriptor
375 */
376typedef struct {
377 u16 tx_status; /* status after transmission of a packet */
378 SREGS_PAD(pad0);
379 u16 tx_config; /* transmit configuration for this packet */
380 SREGS_PAD(pad1);
381 u16 tx_pktsize; /* size of the packet to be transmitted */
382 SREGS_PAD(pad2);
383 u16 tx_frag_count; /* no. of fragments */
384 SREGS_PAD(pad3);
385
386 u16 tx_frag_ptr_l;
387 SREGS_PAD(pad4);
388 u16 tx_frag_ptr_h;
389 SREGS_PAD(pad5);
390 u16 tx_frag_size;
391 SREGS_PAD(pad6);
392
393 u16 link; /* ptr to next descriptor */
394 SREGS_PAD(pad7);
395} sonic_td_t;
396
397
398/*
399 * Describes an entry in the CAM Descriptor Area.
400 */
401
402typedef struct {
403 u16 cam_entry_pointer;
404 SREGS_PAD(pad0);
405 u16 cam_cap0;
406 SREGS_PAD(pad1);
407 u16 cam_cap1;
408 SREGS_PAD(pad2);
409 u16 cam_cap2;
410 SREGS_PAD(pad3);
411} sonic_cd_t;
412
413#define CAM_DESCRIPTORS 16
414
415
416typedef struct {
417 sonic_cd_t cam_desc[CAM_DESCRIPTORS];
418 u16 cam_enable;
419 SREGS_PAD(pad);
420} sonic_cda_t;
421#endif /* endianness */
422
423/*
424 * Some tunables for the buffer areas. Power of 2 is required
425 * the current driver uses one receive buffer for each descriptor.
426 *
427 * MSch: use more buffer space for the slow m68k Macs!
428 */
429#ifdef CONFIG_MACSONIC
430#define SONIC_NUM_RRS 32 /* number of receive resources */
431#define SONIC_NUM_RDS SONIC_NUM_RRS /* number of receive descriptors */
432#define SONIC_NUM_TDS 32 /* number of transmit descriptors */
433#else
434#define SONIC_NUM_RRS 16 /* number of receive resources */
435#define SONIC_NUM_RDS SONIC_NUM_RRS /* number of receive descriptors */
436#define SONIC_NUM_TDS 16 /* number of transmit descriptors */
437#endif
438#define SONIC_RBSIZE 1520 /* size of one resource buffer */
439
440#define SONIC_RDS_MASK (SONIC_NUM_RDS-1)
441#define SONIC_TDS_MASK (SONIC_NUM_TDS-1)
442
443
444/* Information that need to be kept for each board. */
445struct sonic_local {
446 sonic_cda_t cda; /* virtual CPU address of CDA */
447 sonic_td_t tda[SONIC_NUM_TDS]; /* transmit descriptor area */
448 sonic_rr_t rra[SONIC_NUM_RRS]; /* receive resource area */
449 sonic_rd_t rda[SONIC_NUM_RDS]; /* receive descriptor area */
450 struct sk_buff *tx_skb[SONIC_NUM_TDS]; /* skbuffs for packets to transmit */
451 unsigned int tx_laddr[SONIC_NUM_TDS]; /* logical DMA address fro skbuffs */
452 unsigned char *rba; /* start of receive buffer areas */
453 unsigned int cda_laddr; /* logical DMA address of CDA */
454 unsigned int tda_laddr; /* logical DMA address of TDA */
455 unsigned int rra_laddr; /* logical DMA address of RRA */
456 unsigned int rda_laddr; /* logical DMA address of RDA */
457 unsigned int rba_laddr; /* logical DMA address of RBA */
458 unsigned int cur_rra; /* current indexes to resource areas */
459 unsigned int cur_rx;
460 unsigned int cur_tx;
461 unsigned int dirty_tx; /* last unacked transmit packet */
462 char tx_full;
463 struct net_device_stats stats;
464};
465
466#define TX_TIMEOUT 6
467
468/* Index to functions, as function prototypes. */
469
470static int sonic_open(struct net_device *dev);
471static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev);
472static irqreturn_t sonic_interrupt(int irq, void *dev_id, struct pt_regs *regs);
473static void sonic_rx(struct net_device *dev);
474static int sonic_close(struct net_device *dev);
475static struct net_device_stats *sonic_get_stats(struct net_device *dev);
476static void sonic_multicast_list(struct net_device *dev);
477static int sonic_init(struct net_device *dev);
478static void sonic_tx_timeout(struct net_device *dev);
479
480static const char *version =
481 "sonic.c:v0.92 20.9.98 tsbogend@alpha.franken.de\n";
482
483#endif /* SONIC_H */