summaryrefslogtreecommitdiff
path: root/drivers/3c589.c
blob: 541f93b712bd2df96db4806519ad4de6dab5f2ab (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
513
514
515
516
517
518
519
520
521
522
/*------------------------------------------------------------------------
 . 3c589.c
 . This is a driver for 3Com's 3C589 (Etherlink III) PCMCIA Ethernet device.
 .
 . (C) Copyright 2002
 . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 . Rolf Offermanns <rof@sysgo.de>
 .
 . This program is free software; you can redistribute it and/or modify
 . it under the terms of the GNU General Public License as published by
 . the Free Software Foundation; either version 2 of the License, or
 . (at your option) any later version.
 .
 . This program is distributed in the hope that it will be useful,
 . but WITHOUT ANY WARRANTY; without even the implied warranty of
 . MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 . GNU General Public License for more details.
 .
 . You should have received a copy of the GNU General Public License
 . along with this program; if not, write to the Free Software
 . Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 .
 ----------------------------------------------------------------------------*/

#include <common.h>
#include <command.h>
#include <net.h>

#ifdef CONFIG_DRIVER_3C589

#include "3c589.h"


/* Use power-down feature of the chip */
#define POWER_DOWN	0

#define NO_AUTOPROBE

static const char version[] =
	"Your ad here! :P\n";


#undef EL_DEBUG

typedef unsigned char byte;
typedef unsigned short word;
typedef unsigned long int dword;
/*------------------------------------------------------------------------
 .
 . Configuration options, for the experienced user to change.
 .
 -------------------------------------------------------------------------*/

/*
 . Wait time for memory to be free.  This probably shouldn't be
 . tuned that much, as waiting for this means nothing else happens
 . in the system
*/
#define MEMORY_WAIT_TIME 16


#if (EL_DEBUG > 2 )
#define PRINTK3(args...) printf(args)
#else
#define PRINTK3(args...)
#endif

#if EL_DEBUG > 1
#define PRINTK2(args...) printf(args)
#else
#define PRINTK2(args...)
#endif

#ifdef EL_DEBUG
#define PRINTK(args...) printf(args)
#else
#define PRINTK(args...)
#endif

#define outb(args...)	mmio_outb(args)
#define mmio_outb(value, addr)	(*((volatile byte *)(addr)) = value)

#define inb(args...)	mmio_inb(args)
#define mmio_inb(addr) (*((volatile byte *)(addr)))

#define outw(args...)	mmio_outw(args)
#define mmio_outw(value, addr)	(*((volatile word *)(addr)) = value)

#define inw(args...)	mmio_inw(args)
#define mmio_inw(addr) (*((volatile word *)(addr)))

#define outsw(args...)	mmio_outsw(args)
#define mmio_outsw(r,b,l)	({	int __i; \
					word *__b2; \
					__b2 = (word *) b; \
					for (__i = 0; __i < l; __i++) { \
					    mmio_outw( *(__b2 + __i), r); \
					} \
				})

#define insw(args...)	mmio_insw(args)
#define mmio_insw(r,b,l) 	({	int __i ;  \
					word *__b2;  \
			    		__b2 = (word *) b;  \
			    		for (__i = 0; __i < l; __i++) {  \
					  *(__b2 + __i) = mmio_inw(r);  \
					  mmio_inw(0);  \
					};  \
				})

/*------------------------------------------------------------------------
 .
 . The internal workings of the driver.  If you are changing anything
 . here with the 3Com stuff, you should have the datasheet and know
 . what you are doing.
 .
 -------------------------------------------------------------------------*/
#define EL_BASE_ADDR	0x20000000


/* Offsets from base I/O address. */
#define EL3_DATA	0x00
#define EL3_TIMER	0x0a
#define EL3_CMD		0x0e
#define EL3_STATUS	0x0e

#define EEPROM_READ	0x0080

#define EL3WINDOW(win_num) mmio_outw(SelectWindow + (win_num), EL_BASE_ADDR + EL3_CMD)

/* The top five bits written to EL3_CMD are a command, the lower
   11 bits are the parameter, if applicable. */
enum c509cmd {
    TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
    RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
    TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
    FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
    SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
    SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
    StatsDisable = 22<<11, StopCoax = 23<<11,
};

enum c509status {
    IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
    TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
    IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
};

/* The SetRxFilter command accepts the following classes: */
enum RxFilter {
    RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
};

/* Register window 1 offsets, the window used in normal operation. */
#define TX_FIFO		0x00
#define RX_FIFO		0x00
#define RX_STATUS 	0x08
#define TX_STATUS 	0x0B
#define TX_FREE		0x0C	/* Remaining free bytes in Tx buffer. */


/*
  Read a word from the EEPROM using the regular EEPROM access register.
  Assume that we are in register window zero.
*/
static word read_eeprom(dword ioaddr, int index)
{
    int i;
    outw(EEPROM_READ + index, ioaddr + 0xa);
    /* Reading the eeprom takes 162 us */
    for (i = 1620; i >= 0; i--)
	if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
	    break;
    return inw(ioaddr + 0xc);
}

static void el_get_mac_addr( unsigned char *mac_addr )
{
	int i;
	union
	{
		word w;
		unsigned char b[2];
	} wrd;
	unsigned char old_window = inw( EL_BASE_ADDR + EL3_STATUS ) >> 13;
	GO_WINDOW(0);
	VX_BUSY_WAIT;
	for (i = 0; i < 3; i++)
	{
		wrd.w = read_eeprom(EL_BASE_ADDR, 0xa+i);
#ifdef __BIG_ENDIAN
		mac_addr[2*i]   = wrd.b[0];
		mac_addr[2*i+1] = wrd.b[1];
#else
		mac_addr[2*i]   = wrd.b[1];
		mac_addr[2*i+1] = wrd.b[0];
#endif
	}
	GO_WINDOW(old_window);
	VX_BUSY_WAIT;
}


#if EL_DEBUG > 1
static void print_packet( byte * buf, int length )
{
        int i;
        int remainder;
        int lines;

        PRINTK2("Packet of length %d \n", length );

        lines = length / 16;
        remainder = length % 16;

        for ( i = 0; i < lines ; i ++ ) {
                int cur;

                for ( cur = 0; cur < 8; cur ++ ) {
                        byte a, b;

                        a = *(buf ++ );
                        b = *(buf ++ );
                        PRINTK2("%02x%02x ", a, b );
                }
                PRINTK2("\n");
        }
        for ( i = 0; i < remainder/2 ; i++ ) {
                byte a, b;

                a = *(buf ++ );
                b = *(buf ++ );
                PRINTK2("%02x%02x ", a, b );
        }
        PRINTK2("\n");
}
#endif /* EL_DEBUG > 1 */



/**************************************************************************
ETH_RESET - Reset adapter
***************************************************************************/
static void el_reset(bd_t *bd)
{
	/***********************************************************
			Reset 3Com 595 card
	*************************************************************/
	/* QUICK HACK
	 * - adjust timing for 3c589
	 * - enable io for PCMCIA */
	outw(0x0004, 0xa0000018);
	udelay(100);
	outw(0x0041, 0x28010000);
	udelay(100);

	/* issue global reset */
	outw(GLOBAL_RESET, BASE + VX_COMMAND);

	/* must wait for at least 1ms */
	udelay(100000000);

	/* set mac addr */
	{
		unsigned char *mac_addr = bd->bi_enetaddr;
		int i;

		el_get_mac_addr( mac_addr );

		GO_WINDOW(2);
		VX_BUSY_WAIT;

		printf("3C589 MAC Addr.: ");
		for (i = 0; i < 6; i++)
		{
			printf("%02x", mac_addr[i]);
			outb(mac_addr[i], BASE + VX_W2_ADDR_0 + i);
			VX_BUSY_WAIT;
		}
		printf("\n\n");
	}

	/* set RX filter */
	outw(SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST, BASE + VX_COMMAND);
	VX_BUSY_WAIT;


	/* set irq mask and read_zero */
	outw(SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
		S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
	VX_BUSY_WAIT;

	outw(SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
		S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
	VX_BUSY_WAIT;

	/* enable TP Linkbeat */
	GO_WINDOW(4);
	VX_BUSY_WAIT;

	outw( ENABLE_UTP, BASE + VX_W4_MEDIA_TYPE);
	VX_BUSY_WAIT;


/*
 * Attempt to get rid of any stray interrupts that occured during
 * configuration.  On the i386 this isn't possible because one may
 * already be queued.  However, a single stray interrupt is
 * unimportant.
 */

	outw(ACK_INTR | 0xff, BASE + VX_COMMAND);
	VX_BUSY_WAIT;

	/* enable TX and RX */
	outw( RX_ENABLE, BASE + VX_COMMAND );
	VX_BUSY_WAIT;

	outw( TX_ENABLE, BASE + VX_COMMAND );
	VX_BUSY_WAIT;


	/* print the diag. regs. */
	PRINTK2("Diag. Regs\n");
	PRINTK2("--> MEDIA_TYPE:   %04x\n", inw(BASE + VX_W4_MEDIA_TYPE));
	PRINTK2("--> NET_DIAG:     %04x\n", inw(BASE + VX_W4_NET_DIAG));
	PRINTK2("--> FIFO_DIAG:    %04x\n", inw(BASE + VX_W4_FIFO_DIAG));
	PRINTK2("--> CTRLR_STATUS: %04x\n", inw(BASE + VX_W4_CTRLR_STATUS));
	PRINTK2("\n\n");

	/* enter working mode */
	GO_WINDOW(1);
	VX_BUSY_WAIT;

	/* wait for another 1ms */
	udelay(100000000);
}


/*-----------------------------------------------------------------
 .
 .  The driver can be entered at any of the following entry points.
 .
 .------------------------------------------------------------------  */

extern int eth_init(bd_t *bd);
extern void eth_halt(void);
extern int eth_rx(void);
extern int eth_send(volatile void *packet, int length);


/*
 ------------------------------------------------------------
 .
 . Internal routines
 .
 ------------------------------------------------------------
*/

int eth_init(bd_t *bd)
{
	el_reset(bd);
	return 0;
}

void eth_halt() {
	return;
}

#define EDEBUG 1


/**************************************************************************
ETH_POLL - Wait for a frame
***************************************************************************/

int eth_rx()
{
	word status, rx_status, packet_size;

	VX_BUSY_WAIT;

	status = inw( BASE + VX_STATUS );

	if ( (status & S_RX_COMPLETE) == 0 ) return 0; /* nothing to do */

	/* Packet waiting -> check RX_STATUS */
	rx_status = inw( BASE + VX_W1_RX_STATUS );

	if ( rx_status & ERR_RX )
	{
		/* error in packet -> discard */
		PRINTK("[ERROR] Invalid packet -> discarding\n");
		PRINTK("-- error code 0x%02x\n", rx_status & ERR_MASK);
		PRINTK("-- rx bytes 0x%04d\n", rx_status & ((1<<11) - 1));
		PRINTK("[ERROR] Invalid packet -> discarding\n");
		outw( RX_DISCARD_TOP_PACK, BASE + VX_COMMAND );
		return 0;
	}

	/* correct pack. waiting in fifo */
	packet_size = rx_status & RX_BYTES_MASK;

	PRINTK("Correct packet waiting in fifo, size: %d\n", packet_size);

	{
		volatile word *packet_start = (word *)(BASE + VX_W1_RX_PIO_RD_1);
		word *RcvBuffer = (word *)(NetRxPackets[0]);
		int wcount = 0;

		for (wcount = 0; wcount < (packet_size >> 1); wcount++)
		{
			*RcvBuffer++ = *(packet_start);
		}

		/* handle odd packets */
		if ( packet_size & 1 )
		{
			*RcvBuffer++ = *(packet_start);
		}
	}

	/* fifo should now be empty (besides the padding bytes) */
	if ( ((*((word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK) > 3 )
	{
		PRINTK("[ERROR] Fifo not empty after packet read (remaining pkts: %d)\n",
			(((*(word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK));
	}

	/* discard packet */
	*((word *)(BASE + VX_COMMAND)) = RX_DISCARD_TOP_PACK;

	/* Pass Packets to upper Layer */
	NetReceive(NetRxPackets[0], packet_size);
	return packet_size;
}



/**************************************************************************
ETH_TRANSMIT - Transmit a frame
***************************************************************************/
static char padmap[] = {
	0, 3, 2, 1};


int eth_send(volatile void *packet, int length) {
	int pad;
	int status;
	volatile word *buf = (word *)packet;
	int dummy = 0;

	/* padding stuff */
	pad = padmap[length & 3];

	PRINTK("eth_send(), length: %d\n", length);
	/* drop acknowledgements */
	while(( status=inb(EL_BASE_ADDR + VX_W1_TX_STATUS) )& TXS_COMPLETE ) {
		if(status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
			outw(TX_RESET, EL_BASE_ADDR + VX_COMMAND);
			outw(TX_ENABLE, EL_BASE_ADDR + VX_COMMAND);
			PRINTK("Bad status, resetting and reenabling transmitter\n");
		}

		outb(0x0, EL_BASE_ADDR + VX_W1_TX_STATUS);
	}


	while (inw(EL_BASE_ADDR + VX_W1_FREE_TX) < length + pad + 4) {
		/* no room in FIFO */
		if (dummy == 0)
		{
			PRINTK("No room in FIFO, waiting...\n");
			dummy++;
		}

	}

	PRINTK("    ---> FIFO ready\n");


	outw(length, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);

	/* Second dword meaningless */
	outw(0x0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);

#if EL_DEBUG > 1
	print_packet((byte *)buf, length);
#endif

	/* write packet */
	{
		unsigned int i, totw;

		totw = ((length + 1) >> 1);
		PRINTK("Buffer: (totw = %d)\n", totw);
		for (i = 0; i < totw; i++) {
			outw( *(buf+i), EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
			udelay(10);
		}
		if(totw & 1)
		{	/* pad to double word length */
			outw( 0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
			udelay(10);
		}
		PRINTK("\n\n");
	}

        /* wait for Tx complete */
	PRINTK("Waiting for Tx to complete...\n");
        while(((status = inw(EL_BASE_ADDR + VX_STATUS)) & S_COMMAND_IN_PROGRESS) != 0)
	{
		udelay(10);
	}
	PRINTK("   ---> Tx completed, status = 0x%04x\n", status);

	return length;
}



#endif /* CONFIG_DRIVER_3C589 */