aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/sonic.h
blob: 07091dd27e5df2969592a3faa54f30fdad4a4844 (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
/*
 * Header file for sonic.c
 *
 * (C) Waldorf Electronics, Germany
 * Written by Andreas Busse
 *
 * NOTE: most of the structure definitions here are endian dependent.
 * If you want to use this driver on big endian machines, the data
 * and pad structure members must be exchanged. Also, the structures
 * need to be changed accordingly to the bus size.
 *
 * 981229 MSch:	did just that for the 68k Mac port (32 bit, big endian)
 *
 * 990611 David Huggins-Daines <dhd@debian.org>: This machine abstraction
 * does not cope with 16-bit bus sizes very well.  Therefore I have
 * rewritten it with ugly macros and evil inlines.
 *
 * 050625 Finn Thain: introduced more 32-bit cards and dhd's support
 *        for 16-bit cards (from the mac68k project).
 */

#ifndef SONIC_H
#define SONIC_H


/*
 * SONIC register offsets
 */

#define SONIC_CMD              0x00
#define SONIC_DCR              0x01
#define SONIC_RCR              0x02
#define SONIC_TCR              0x03
#define SONIC_IMR              0x04
#define SONIC_ISR              0x05

#define SONIC_UTDA             0x06
#define SONIC_CTDA             0x07

#define SONIC_URDA             0x0d
#define SONIC_CRDA             0x0e
#define SONIC_EOBC             0x13
#define SONIC_URRA             0x14
#define SONIC_RSA              0x15
#define SONIC_REA              0x16
#define SONIC_RRP              0x17
#define SONIC_RWP              0x18
#define SONIC_RSC              0x2b

#define SONIC_CEP              0x21
#define SONIC_CAP2             0x22
#define SONIC_CAP1             0x23
#define SONIC_CAP0             0x24
#define SONIC_CE               0x25
#define SONIC_CDP              0x26
#define SONIC_CDC              0x27

#define SONIC_WT0              0x29
#define SONIC_WT1              0x2a

#define SONIC_SR               0x28


/* test-only registers */

#define SONIC_TPS		0x08
#define SONIC_TFC		0x09
#define SONIC_TSA0		0x0a
#define SONIC_TSA1		0x0b
#define SONIC_TFS		0x0c

#define SONIC_CRBA0		0x0f
#define SONIC_CRBA1		0x10
#define SONIC_RBWC0		0x11
#define SONIC_RBWC1		0x12
#define SONIC_TTDA		0x20
#define SONIC_MDT		0x2f

#define SONIC_TRBA0		0x19
#define SONIC_TRBA1		0x1a
#define SONIC_TBWC0		0x1b
#define SONIC_TBWC1		0x1c
#define SONIC_LLFA		0x1f

#define SONIC_ADDR0		0x1d
#define SONIC_ADDR1		0x1e

/*
 * Error counters
 */

#define SONIC_CRCT              0x2c
#define SONIC_FAET              0x2d
#define SONIC_MPT               0x2e

#define SONIC_DCR2              0x3f

/*
 * SONIC command bits
 */

#define SONIC_CR_LCAM           0x0200
#define SONIC_CR_RRRA           0x0100
#define SONIC_CR_RST            0x0080
#define SONIC_CR_ST             0x0020
#define SONIC_CR_STP            0x0010
#define SONIC_CR_RXEN           0x0008
#define SONIC_CR_RXDIS          0x0004
#define SONIC_CR_TXP            0x0002
#define SONIC_CR_HTX            0x0001

/*
 * SONIC data configuration bits
 */

#define SONIC_DCR_EXBUS         0x8000
#define SONIC_DCR_LBR           0x2000
#define SONIC_DCR_PO1           0x1000
#define SONIC_DCR_PO0           0x0800
#define SONIC_DCR_SBUS          0x0400
#define SONIC_DCR_USR1          0x0200
#define SONIC_DCR_USR0          0x0100
#define SONIC_DCR_WC1           0x0080
#define SONIC_DCR_WC0           0x0040
#define SONIC_DCR_DW            0x0020
#define SONIC_DCR_BMS           0x0010
#define SONIC_DCR_RFT1          0x0008
#define SONIC_DCR_RFT0          0x0004
#define SONIC_DCR_TFT1          0x0002
#define SONIC_DCR_TFT0          0x0001

/*
 * Constants for the SONIC receive control register.
 */

#define SONIC_RCR_ERR           0x8000
#define SONIC_RCR_RNT           0x4000
#define SONIC_RCR_BRD           0x2000
#define SONIC_RCR_PRO           0x1000
#define SONIC_RCR_AMC           0x0800
#define SONIC_RCR_LB1           0x0400
#define SONIC_RCR_LB0           0x0200

#define SONIC_RCR_MC            0x0100
#define SONIC_RCR_BC            0x0080
#define SONIC_RCR_LPKT          0x0040
#define SONIC_RCR_CRS           0x0020
#define SONIC_RCR_COL           0x0010
#define SONIC_RCR_CRCR          0x0008
#define SONIC_RCR_FAER          0x0004
#define SONIC_RCR_LBK           0x0002
#define SONIC_RCR_PRX           0x0001

#define SONIC_RCR_LB_OFF        0
#define SONIC_RCR_LB_MAC        SONIC_RCR_LB0
#define SONIC_RCR_LB_ENDEC      SONIC_RCR_LB1
#define SONIC_RCR_LB_TRANS      (SONIC_RCR_LB0 | SONIC_RCR_LB1)

/* default RCR setup */

#define SONIC_RCR_DEFAULT       (SONIC_RCR_BRD)


/*
 * SONIC Transmit Control register bits
 */

#define SONIC_TCR_PINTR         0x8000
#define SONIC_TCR_POWC          0x4000
#define SONIC_TCR_CRCI          0x2000
#define SONIC_TCR_EXDIS         0x1000
#define SONIC_TCR_EXD           0x0400
#define SONIC_TCR_DEF           0x0200
#define SONIC_TCR_NCRS          0x0100
#define SONIC_TCR_CRLS          0x0080
#define SONIC_TCR_EXC           0x0040
#define SONIC_TCR_PMB           0x0008
#define SONIC_TCR_FU            0x0004
#define SONIC_TCR_BCM           0x0002
#define SONIC_TCR_PTX           0x0001

#define SONIC_TCR_DEFAULT       0x0000

/*
 * Constants for the SONIC_INTERRUPT_MASK and
 * SONIC_INTERRUPT_STATUS registers.
 */

#define SONIC_INT_BR		0x4000
#define SONIC_INT_HBL		0x2000
#define SONIC_INT_LCD		0x1000
#define SONIC_INT_PINT		0x0800
#define SONIC_INT_PKTRX		0x0400
#define SONIC_INT_TXDN		0x0200
#define SONIC_INT_TXER		0x0100
#define SONIC_INT_TC		0x0080
#define SONIC_INT_RDE		0x0040
#define SONIC_INT_RBE		0x0020
#define SONIC_INT_RBAE		0x0010
#define SONIC_INT_CRC		0x0008
#define SONIC_INT_FAE		0x0004
#define SONIC_INT_MP		0x0002
#define SONIC_INT_RFO		0x0001


/*
 * The interrupts we allow.
 */

#define SONIC_IMR_DEFAULT     ( SONIC_INT_BR | \
                                SONIC_INT_LCD | \
                                SONIC_INT_RFO | \
                                SONIC_INT_PKTRX | \
                                SONIC_INT_TXDN | \
                                SONIC_INT_TXER | \
                                SONIC_INT_RDE | \
                                SONIC_INT_RBAE | \
                                SONIC_INT_CRC | \
                                SONIC_INT_FAE | \
                                SONIC_INT_MP)


#define SONIC_EOL       0x0001
#define CAM_DESCRIPTORS 16

/* Offsets in the various DMA buffers accessed by the SONIC */

#define SONIC_BITMODE16 0
#define SONIC_BITMODE32 1
#define SONIC_BUS_SCALE(bitmode) ((bitmode) ? 4 : 2)
/* Note!  These are all measured in bus-size units, so use SONIC_BUS_SCALE */
#define SIZEOF_SONIC_RR 4
#define SONIC_RR_BUFADR_L  0
#define SONIC_RR_BUFADR_H  1
#define SONIC_RR_BUFSIZE_L 2
#define SONIC_RR_BUFSIZE_H 3

#define SIZEOF_SONIC_RD 7
#define SONIC_RD_STATUS   0
#define SONIC_RD_PKTLEN   1
#define SONIC_RD_PKTPTR_L 2
#define SONIC_RD_PKTPTR_H 3
#define SONIC_RD_SEQNO    4
#define SONIC_RD_LINK     5
#define SONIC_RD_IN_USE   6

#define SIZEOF_SONIC_TD 8
#define SONIC_TD_STATUS       0
#define SONIC_TD_CONFIG       1
#define SONIC_TD_PKTSIZE      2
#define SONIC_TD_FRAG_COUNT   3
#define SONIC_TD_FRAG_PTR_L   4
#define SONIC_TD_FRAG_PTR_H   5
#define SONIC_TD_FRAG_SIZE    6
#define SONIC_TD_LINK         7

#define SIZEOF_SONIC_CD 4
#define SONIC_CD_ENTRY_POINTER 0
#define SONIC_CD_CAP0          1
#define SONIC_CD_CAP1          2
#define SONIC_CD_CAP2          3

#define SIZEOF_SONIC_CDA ((CAM_DESCRIPTORS * SIZEOF_SONIC_CD) + 1)
#define SONIC_CDA_CAM_ENABLE   (CAM_DESCRIPTORS * SIZEOF_SONIC_CD)

/*
 * Some tunables for the buffer areas. Power of 2 is required
 * the current driver uses one receive buffer for each descriptor.
 *
 * MSch: use more buffer space for the slow m68k Macs!
 */
#define SONIC_NUM_RRS   16            /* number of receive resources */
#define SONIC_NUM_RDS   SONIC_NUM_RRS /* number of receive descriptors */
#define SONIC_NUM_TDS   16            /* number of transmit descriptors */

#define SONIC_RDS_MASK  (SONIC_NUM_RDS-1)
#define SONIC_TDS_MASK  (SONIC_NUM_TDS-1)

#define SONIC_RBSIZE	1520          /* size of one resource buffer */

/* Again, measured in bus size units! */
#define SIZEOF_SONIC_DESC (SIZEOF_SONIC_CDA	\
	+ (SIZEOF_SONIC_TD * SONIC_NUM_TDS)	\
	+ (SIZEOF_SONIC_RD * SONIC_NUM_RDS)	\
	+ (SIZEOF_SONIC_RR * SONIC_NUM_RRS))

/* Information that need to be kept for each board. */
struct sonic_local {
	/* Bus size.  0 == 16 bits, 1 == 32 bits. */
	int dma_bitmode;
	/* Register offset within the longword (independent of endianness,
	   and varies from one type of Macintosh SONIC to another
	   (Aarrgh)) */
	int reg_offset;
	void *descriptors;
	/* Crud.  These areas have to be within the same 64K.  Therefore
       we allocate a desriptors page, and point these to places within it. */
	void *cda;  /* CAM descriptor area */
	void *tda;  /* Transmit descriptor area */
	void *rra;  /* Receive resource area */
	void *rda;  /* Receive descriptor area */
	struct sk_buff* volatile rx_skb[SONIC_NUM_RRS];	/* packets to be received */
	struct sk_buff* volatile tx_skb[SONIC_NUM_TDS];	/* packets to be transmitted */
	unsigned int tx_len[SONIC_NUM_TDS]; /* lengths of tx DMA mappings */
	/* Logical DMA addresses on MIPS, bus addresses on m68k
	 * (so "laddr" is a bit misleading) */
	dma_addr_t descriptors_laddr;
	u32 cda_laddr;              /* logical DMA address of CDA */
	u32 tda_laddr;              /* logical DMA address of TDA */
	u32 rra_laddr;              /* logical DMA address of RRA */
	u32 rda_laddr;              /* logical DMA address of RDA */
	dma_addr_t rx_laddr[SONIC_NUM_RRS]; /* logical DMA addresses of rx skbuffs */
	dma_addr_t tx_laddr[SONIC_NUM_TDS]; /* logical DMA addresses of tx skbuffs */
	unsigned int rra_end;
	unsigned int cur_rwp;
	unsigned int cur_rx;
	unsigned int cur_tx;           /* first unacked transmit packet */
	unsigned int eol_rx;
	unsigned int eol_tx;           /* last unacked transmit packet */
	unsigned int next_tx;          /* next free TD */
	struct device *device;         /* generic device */
	struct net_device_stats stats;
};

#define TX_TIMEOUT (3 * HZ)

/* Index to functions, as function prototypes. */

static int sonic_open(struct net_device *dev);
static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t sonic_interrupt(int irq, void *dev_id);
static void sonic_rx(struct net_device *dev);
static int sonic_close(struct net_device *dev);
static struct net_device_stats *sonic_get_stats(struct net_device *dev);
static void sonic_multicast_list(struct net_device *dev);
static int sonic_init(struct net_device *dev);
static void sonic_tx_timeout(struct net_device *dev);

/* Internal inlines for reading/writing DMA buffers.  Note that bus
   size and endianness matter here, whereas they don't for registers,
   as far as we can tell. */
/* OpenBSD calls this "SWO".  I'd like to think that sonic_buf_put()
   is a much better name. */
static inline void sonic_buf_put(void* base, int bitmode,
				 int offset, __u16 val)
{
	if (bitmode)
#ifdef __BIG_ENDIAN
		((__u16 *) base + (offset*2))[1] = val;
#else
		((__u16 *) base + (offset*2))[0] = val;
#endif
	else
	 	((__u16 *) base)[offset] = val;
}

static inline __u16 sonic_buf_get(void* base, int bitmode,
				  int offset)
{
	if (bitmode)
#ifdef __BIG_ENDIAN
		return ((volatile __u16 *) base + (offset*2))[1];
#else
		return ((volatile __u16 *) base + (offset*2))[0];
#endif
	else
		return ((volatile __u16 *) base)[offset];
}

/* Inlines that you should actually use for reading/writing DMA buffers */
static inline void sonic_cda_put(struct net_device* dev, int entry,
				 int offset, __u16 val)
{
	struct sonic_local *lp = netdev_priv(dev);
	sonic_buf_put(lp->cda, lp->dma_bitmode,
		      (entry * SIZEOF_SONIC_CD) + offset, val);
}

static inline __u16 sonic_cda_get(struct net_device* dev, int entry,
				  int offset)
{
	struct sonic_local *lp = netdev_priv(dev);
	return sonic_buf_get(lp->cda, lp->dma_bitmode,
			     (entry * SIZEOF_SONIC_CD) + offset);
}

static inline void sonic_set_cam_enable(struct net_device* dev, __u16 val)
{
	struct sonic_local *lp = netdev_priv(dev);
	sonic_buf_put(lp->cda, lp->dma_bitmode, SONIC_CDA_CAM_ENABLE, val);
}

static inline __u16 sonic_get_cam_enable(struct net_device* dev)
{
	struct sonic_local *lp = netdev_priv(dev);
	return sonic_buf_get(lp->cda, lp->dma_bitmode, SONIC_CDA_CAM_ENABLE);
}

static inline void sonic_tda_put(struct net_device* dev, int entry,
				 int offset, __u16 val)
{
	struct sonic_local *lp = netdev_priv(dev);
	sonic_buf_put(lp->tda, lp->dma_bitmode,
		      (entry * SIZEOF_SONIC_TD) + offset, val);
}

static inline __u16 sonic_tda_get(struct net_device* dev, int entry,
				  int offset)
{
	struct sonic_local *lp = netdev_priv(dev);
	return sonic_buf_get(lp->tda, lp->dma_bitmode,
			     (entry * SIZEOF_SONIC_TD) + offset);
}

static inline void sonic_rda_put(struct net_device* dev, int entry,
				 int offset, __u16 val)
{
	struct sonic_local *lp = netdev_priv(dev);
	sonic_buf_put(lp->rda, lp->dma_bitmode,
		      (entry * SIZEOF_SONIC_RD) + offset, val);
}

static inline __u16 sonic_rda_get(struct net_device* dev, int entry,
				  int offset)
{
	struct sonic_local *lp = netdev_priv(dev);
	return sonic_buf_get(lp->rda, lp->dma_bitmode,
			     (entry * SIZEOF_SONIC_RD) + offset);
}

static inline void sonic_rra_put(struct net_device* dev, int entry,
				 int offset, __u16 val)
{
	struct sonic_local *lp = netdev_priv(dev);
	sonic_buf_put(lp->rra, lp->dma_bitmode,
		      (entry * SIZEOF_SONIC_RR) + offset, val);
}

static inline __u16 sonic_rra_get(struct net_device* dev, int entry,
				  int offset)
{
	struct sonic_local *lp = netdev_priv(dev);
	return sonic_buf_get(lp->rra, lp->dma_bitmode,
			     (entry * SIZEOF_SONIC_RR) + offset);
}

static const char *version =
    "sonic.c:v0.92 20.9.98 tsbogend@alpha.franken.de\n";

#endif /* SONIC_H */