1 /*
2  *    Lance ethernet driver for the MIPS processor based
3  *      DECstation family
4  *
5  *
6  *      adopted from sunlance.c by Richard van den Berg
7  *
8  *      Copyright (C) 2002, 2003, 2005, 2006  Maciej W. Rozycki
9  *
10  *      additional sources:
11  *      - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
12  *        Revision 1.2
13  *
14  *      History:
15  *
16  *      v0.001: The kernel accepts the code and it shows the hardware address.
17  *
18  *      v0.002: Removed most sparc stuff, left only some module and dma stuff.
19  *
20  *      v0.003: Enhanced base address calculation from proposals by
21  *              Harald Koerfgen and Thomas Riemer.
22  *
23  *      v0.004: lance-regs is pointing at the right addresses, added prom
24  *              check. First start of address mapping and DMA.
25  *
26  *      v0.005: started to play around with LANCE-DMA. This driver will not
27  *              work for non IOASIC lances. HK
28  *
29  *      v0.006: added pointer arrays to lance_private and setup routine for
30  *              them in dec_lance_init. HK
31  *
32  *      v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
33  *              access the init block. This looks like one (short) word at a
34  *              time, but the smallest amount the IOASIC can transfer is a
35  *              (long) word. So we have a 2-2 padding here. Changed
36  *              lance_init_block accordingly. The 16-16 padding for the buffers
37  *              seems to be correct. HK
38  *
39  *      v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
40  *
41  *      v0.009: Module support fixes, multiple interfaces support, various
42  *              bits. macro
43  *
44  *      v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
45  *              PMAX requirement to only use halfword accesses to the
46  *              buffer. macro
47  *
48  *      v0.011: Converted the PMAD to the driver model. macro
49  */
50 
51 #include <linux/crc32.h>
52 #include <linux/delay.h>
53 #include <linux/errno.h>
54 #include <linux/if_ether.h>
55 #include <linux/init.h>
56 #include <linux/kernel.h>
57 #include <linux/module.h>
58 #include <linux/netdevice.h>
59 #include <linux/etherdevice.h>
60 #include <linux/spinlock.h>
61 #include <linux/stddef.h>
62 #include <linux/string.h>
63 #include <linux/tc.h>
64 #include <linux/types.h>
65 
66 #include <asm/addrspace.h>
67 
68 #include <asm/dec/interrupts.h>
69 #include <asm/dec/ioasic.h>
70 #include <asm/dec/ioasic_addrs.h>
71 #include <asm/dec/kn01.h>
72 #include <asm/dec/machtype.h>
73 #include <asm/dec/system.h>
74 
75 static const char version[] =
76 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
77 
78 MODULE_AUTHOR("Linux MIPS DECstation task force");
79 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
80 MODULE_LICENSE("GPL");
81 
82 #define __unused __attribute__ ((unused))
83 
84 /*
85  * card types
86  */
87 #define ASIC_LANCE 1
88 #define PMAD_LANCE 2
89 #define PMAX_LANCE 3
90 
91 
92 #define LE_CSR0 0
93 #define LE_CSR1 1
94 #define LE_CSR2 2
95 #define LE_CSR3 3
96 
97 #define LE_MO_PROM      0x8000	/* Enable promiscuous mode */
98 
99 #define	LE_C0_ERR	0x8000	/* Error: set if BAB, SQE, MISS or ME is set */
100 #define	LE_C0_BABL	0x4000	/* BAB:  Babble: tx timeout. */
101 #define	LE_C0_CERR	0x2000	/* SQE:  Signal quality error */
102 #define	LE_C0_MISS	0x1000	/* MISS: Missed a packet */
103 #define	LE_C0_MERR	0x0800	/* ME:   Memory error */
104 #define	LE_C0_RINT	0x0400	/* Received interrupt */
105 #define	LE_C0_TINT	0x0200	/* Transmitter Interrupt */
106 #define	LE_C0_IDON	0x0100	/* IFIN: Init finished. */
107 #define	LE_C0_INTR	0x0080	/* Interrupt or error */
108 #define	LE_C0_INEA	0x0040	/* Interrupt enable */
109 #define	LE_C0_RXON	0x0020	/* Receiver on */
110 #define	LE_C0_TXON	0x0010	/* Transmitter on */
111 #define	LE_C0_TDMD	0x0008	/* Transmitter demand */
112 #define	LE_C0_STOP	0x0004	/* Stop the card */
113 #define	LE_C0_STRT	0x0002	/* Start the card */
114 #define	LE_C0_INIT	0x0001	/* Init the card */
115 
116 #define	LE_C3_BSWP	0x4	/* SWAP */
117 #define	LE_C3_ACON	0x2	/* ALE Control */
118 #define	LE_C3_BCON	0x1	/* Byte control */
119 
120 /* Receive message descriptor 1 */
121 #define LE_R1_OWN	0x8000	/* Who owns the entry */
122 #define LE_R1_ERR	0x4000	/* Error: if FRA, OFL, CRC or BUF is set */
123 #define LE_R1_FRA	0x2000	/* FRA: Frame error */
124 #define LE_R1_OFL	0x1000	/* OFL: Frame overflow */
125 #define LE_R1_CRC	0x0800	/* CRC error */
126 #define LE_R1_BUF	0x0400	/* BUF: Buffer error */
127 #define LE_R1_SOP	0x0200	/* Start of packet */
128 #define LE_R1_EOP	0x0100	/* End of packet */
129 #define LE_R1_POK	0x0300	/* Packet is complete: SOP + EOP */
130 
131 /* Transmit message descriptor 1 */
132 #define LE_T1_OWN	0x8000	/* Lance owns the packet */
133 #define LE_T1_ERR	0x4000	/* Error summary */
134 #define LE_T1_EMORE	0x1000	/* Error: more than one retry needed */
135 #define LE_T1_EONE	0x0800	/* Error: one retry needed */
136 #define LE_T1_EDEF	0x0400	/* Error: deferred */
137 #define LE_T1_SOP	0x0200	/* Start of packet */
138 #define LE_T1_EOP	0x0100	/* End of packet */
139 #define LE_T1_POK	0x0300	/* Packet is complete: SOP + EOP */
140 
141 #define LE_T3_BUF       0x8000	/* Buffer error */
142 #define LE_T3_UFL       0x4000	/* Error underflow */
143 #define LE_T3_LCOL      0x1000	/* Error late collision */
144 #define LE_T3_CLOS      0x0800	/* Error carrier loss */
145 #define LE_T3_RTY       0x0400	/* Error retry */
146 #define LE_T3_TDR       0x03ff	/* Time Domain Reflectometry counter */
147 
148 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
149 
150 #ifndef LANCE_LOG_TX_BUFFERS
151 #define LANCE_LOG_TX_BUFFERS 4
152 #define LANCE_LOG_RX_BUFFERS 4
153 #endif
154 
155 #define TX_RING_SIZE			(1 << (LANCE_LOG_TX_BUFFERS))
156 #define TX_RING_MOD_MASK		(TX_RING_SIZE - 1)
157 
158 #define RX_RING_SIZE			(1 << (LANCE_LOG_RX_BUFFERS))
159 #define RX_RING_MOD_MASK		(RX_RING_SIZE - 1)
160 
161 #define PKT_BUF_SZ		1536
162 #define RX_BUFF_SIZE            PKT_BUF_SZ
163 #define TX_BUFF_SIZE            PKT_BUF_SZ
164 
165 #undef TEST_HITS
166 #define ZERO 0
167 
168 /*
169  * The DS2100/3100 have a linear 64 kB buffer which supports halfword
170  * accesses only.  Each halfword of the buffer is word-aligned in the
171  * CPU address space.
172  *
173  * The PMAD-AA has a 128 kB buffer on-board.
174  *
175  * The IOASIC LANCE devices use a shared memory region.  This region
176  * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
177  * boundary.  The LANCE sees this as a 64 kB long continuous memory
178  * region.
179  *
180  * The LANCE's DMA address is used as an index in this buffer and DMA
181  * takes place in bursts of eight 16-bit words which are packed into
182  * four 32-bit words by the IOASIC.  This leads to a strange padding:
183  * 16 bytes of valid data followed by a 16 byte gap :-(.
184  */
185 
186 struct lance_rx_desc {
187 	unsigned short rmd0;		/* low address of packet */
188 	unsigned short rmd1;		/* high address of packet
189 					   and descriptor bits */
190 	short length;			/* 2s complement (negative!)
191 					   of buffer length */
192 	unsigned short mblength;	/* actual number of bytes received */
193 };
194 
195 struct lance_tx_desc {
196 	unsigned short tmd0;		/* low address of packet */
197 	unsigned short tmd1;		/* high address of packet
198 					   and descriptor bits */
199 	short length;			/* 2s complement (negative!)
200 					   of buffer length */
201 	unsigned short misc;
202 };
203 
204 
205 /* First part of the LANCE initialization block, described in databook. */
206 struct lance_init_block {
207 	unsigned short mode;		/* pre-set mode (reg. 15) */
208 
209 	unsigned short phys_addr[3];	/* physical ethernet address */
210 	unsigned short filter[4];	/* multicast filter */
211 
212 	/* Receive and transmit ring base, along with extra bits. */
213 	unsigned short rx_ptr;		/* receive descriptor addr */
214 	unsigned short rx_len;		/* receive len and high addr */
215 	unsigned short tx_ptr;		/* transmit descriptor addr */
216 	unsigned short tx_len;		/* transmit len and high addr */
217 
218 	short gap[4];
219 
220 	/* The buffer descriptors */
221 	struct lance_rx_desc brx_ring[RX_RING_SIZE];
222 	struct lance_tx_desc btx_ring[TX_RING_SIZE];
223 };
224 
225 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
226 #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
227 
228 #define shift_off(off, type)						\
229 	(type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
230 
231 #define lib_off(rt, type)						\
232 	shift_off(offsetof(struct lance_init_block, rt), type)
233 
234 #define lib_ptr(ib, rt, type) 						\
235 	((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
236 
237 #define rds_off(rt, type)						\
238 	shift_off(offsetof(struct lance_rx_desc, rt), type)
239 
240 #define rds_ptr(rd, rt, type) 						\
241 	((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
242 
243 #define tds_off(rt, type)						\
244 	shift_off(offsetof(struct lance_tx_desc, rt), type)
245 
246 #define tds_ptr(td, rt, type) 						\
247 	((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
248 
249 struct lance_private {
250 	struct net_device *next;
251 	int type;
252 	int dma_irq;
253 	volatile struct lance_regs *ll;
254 
255 	spinlock_t	lock;
256 
257 	int rx_new, tx_new;
258 	int rx_old, tx_old;
259 
260 	unsigned short busmaster_regval;
261 
262 	struct timer_list       multicast_timer;
263 	struct net_device	*dev;
264 
265 	/* Pointers to the ring buffers as seen from the CPU */
266 	char *rx_buf_ptr_cpu[RX_RING_SIZE];
267 	char *tx_buf_ptr_cpu[TX_RING_SIZE];
268 
269 	/* Pointers to the ring buffers as seen from the LANCE */
270 	uint rx_buf_ptr_lnc[RX_RING_SIZE];
271 	uint tx_buf_ptr_lnc[TX_RING_SIZE];
272 };
273 
274 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
275 			lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
276 			lp->tx_old - lp->tx_new-1)
277 
278 /* The lance control ports are at an absolute address, machine and tc-slot
279  * dependent.
280  * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
281  * so we have to give the structure an extra member making rap pointing
282  * at the right address
283  */
284 struct lance_regs {
285 	volatile unsigned short rdp;	/* register data port */
286 	unsigned short pad;
287 	volatile unsigned short rap;	/* register address port */
288 };
289 
290 int dec_lance_debug = 2;
291 
292 static struct tc_driver dec_lance_tc_driver;
293 static struct net_device *root_lance_dev;
294 
295 static inline void writereg(volatile unsigned short *regptr, short value)
296 {
297 	*regptr = value;
298 	iob();
299 }
300 
301 /* Load the CSR registers */
302 static void load_csrs(struct lance_private *lp)
303 {
304 	volatile struct lance_regs *ll = lp->ll;
305 	uint leptr;
306 
307 	/* The address space as seen from the LANCE
308 	 * begins at address 0. HK
309 	 */
310 	leptr = 0;
311 
312 	writereg(&ll->rap, LE_CSR1);
313 	writereg(&ll->rdp, (leptr & 0xFFFF));
314 	writereg(&ll->rap, LE_CSR2);
315 	writereg(&ll->rdp, leptr >> 16);
316 	writereg(&ll->rap, LE_CSR3);
317 	writereg(&ll->rdp, lp->busmaster_regval);
318 
319 	/* Point back to csr0 */
320 	writereg(&ll->rap, LE_CSR0);
321 }
322 
323 /*
324  * Our specialized copy routines
325  *
326  */
327 static void cp_to_buf(const int type, void *to, const void *from, int len)
328 {
329 	unsigned short *tp;
330 	const unsigned short *fp;
331 	unsigned short clen;
332 	unsigned char *rtp;
333 	const unsigned char *rfp;
334 
335 	if (type == PMAD_LANCE) {
336 		memcpy(to, from, len);
337 	} else if (type == PMAX_LANCE) {
338 		clen = len >> 1;
339 		tp = to;
340 		fp = from;
341 
342 		while (clen--) {
343 			*tp++ = *fp++;
344 			tp++;
345 		}
346 
347 		clen = len & 1;
348 		rtp = (unsigned char *)tp;
349 		rfp = (const unsigned char *)fp;
350 		while (clen--) {
351 			*rtp++ = *rfp++;
352 		}
353 	} else {
354 		/*
355 		 * copy 16 Byte chunks
356 		 */
357 		clen = len >> 4;
358 		tp = to;
359 		fp = from;
360 		while (clen--) {
361 			*tp++ = *fp++;
362 			*tp++ = *fp++;
363 			*tp++ = *fp++;
364 			*tp++ = *fp++;
365 			*tp++ = *fp++;
366 			*tp++ = *fp++;
367 			*tp++ = *fp++;
368 			*tp++ = *fp++;
369 			tp += 8;
370 		}
371 
372 		/*
373 		 * do the rest, if any.
374 		 */
375 		clen = len & 15;
376 		rtp = (unsigned char *)tp;
377 		rfp = (const unsigned char *)fp;
378 		while (clen--) {
379 			*rtp++ = *rfp++;
380 		}
381 	}
382 
383 	iob();
384 }
385 
386 static void cp_from_buf(const int type, void *to, const void *from, int len)
387 {
388 	unsigned short *tp;
389 	const unsigned short *fp;
390 	unsigned short clen;
391 	unsigned char *rtp;
392 	const unsigned char *rfp;
393 
394 	if (type == PMAD_LANCE) {
395 		memcpy(to, from, len);
396 	} else if (type == PMAX_LANCE) {
397 		clen = len >> 1;
398 		tp = to;
399 		fp = from;
400 		while (clen--) {
401 			*tp++ = *fp++;
402 			fp++;
403 		}
404 
405 		clen = len & 1;
406 
407 		rtp = (unsigned char *)tp;
408 		rfp = (const unsigned char *)fp;
409 
410 		while (clen--) {
411 			*rtp++ = *rfp++;
412 		}
413 	} else {
414 
415 		/*
416 		 * copy 16 Byte chunks
417 		 */
418 		clen = len >> 4;
419 		tp = to;
420 		fp = from;
421 		while (clen--) {
422 			*tp++ = *fp++;
423 			*tp++ = *fp++;
424 			*tp++ = *fp++;
425 			*tp++ = *fp++;
426 			*tp++ = *fp++;
427 			*tp++ = *fp++;
428 			*tp++ = *fp++;
429 			*tp++ = *fp++;
430 			fp += 8;
431 		}
432 
433 		/*
434 		 * do the rest, if any.
435 		 */
436 		clen = len & 15;
437 		rtp = (unsigned char *)tp;
438 		rfp = (const unsigned char *)fp;
439 		while (clen--) {
440 			*rtp++ = *rfp++;
441 		}
442 
443 
444 	}
445 
446 }
447 
448 /* Setup the Lance Rx and Tx rings */
449 static void lance_init_ring(struct net_device *dev)
450 {
451 	struct lance_private *lp = netdev_priv(dev);
452 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
453 	uint leptr;
454 	int i;
455 
456 	/* Lock out other processes while setting up hardware */
457 	netif_stop_queue(dev);
458 	lp->rx_new = lp->tx_new = 0;
459 	lp->rx_old = lp->tx_old = 0;
460 
461 	/* Copy the ethernet address to the lance init block.
462 	 * XXX bit 0 of the physical address registers has to be zero
463 	 */
464 	*lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
465 				     dev->dev_addr[0];
466 	*lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
467 				     dev->dev_addr[2];
468 	*lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
469 				     dev->dev_addr[4];
470 	/* Setup the initialization block */
471 
472 	/* Setup rx descriptor pointer */
473 	leptr = offsetof(struct lance_init_block, brx_ring);
474 	*lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
475 					 (leptr >> 16);
476 	*lib_ptr(ib, rx_ptr, lp->type) = leptr;
477 	if (ZERO)
478 		printk("RX ptr: %8.8x(%8.8x)\n",
479 		       leptr, (uint)lib_off(brx_ring, lp->type));
480 
481 	/* Setup tx descriptor pointer */
482 	leptr = offsetof(struct lance_init_block, btx_ring);
483 	*lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
484 					 (leptr >> 16);
485 	*lib_ptr(ib, tx_ptr, lp->type) = leptr;
486 	if (ZERO)
487 		printk("TX ptr: %8.8x(%8.8x)\n",
488 		       leptr, (uint)lib_off(btx_ring, lp->type));
489 
490 	if (ZERO)
491 		printk("TX rings:\n");
492 
493 	/* Setup the Tx ring entries */
494 	for (i = 0; i < TX_RING_SIZE; i++) {
495 		leptr = lp->tx_buf_ptr_lnc[i];
496 		*lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
497 		*lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
498 							   0xff;
499 		*lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
500 						/* The ones required by tmd2 */
501 		*lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
502 		if (i < 3 && ZERO)
503 			printk("%d: %8.8x(%p)\n",
504 			       i, leptr, lp->tx_buf_ptr_cpu[i]);
505 	}
506 
507 	/* Setup the Rx ring entries */
508 	if (ZERO)
509 		printk("RX rings:\n");
510 	for (i = 0; i < RX_RING_SIZE; i++) {
511 		leptr = lp->rx_buf_ptr_lnc[i];
512 		*lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
513 		*lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
514 							    0xff) |
515 							   LE_R1_OWN;
516 		*lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
517 							     0xf000;
518 		*lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
519 		if (i < 3 && ZERO)
520 			printk("%d: %8.8x(%p)\n",
521 			       i, leptr, lp->rx_buf_ptr_cpu[i]);
522 	}
523 	iob();
524 }
525 
526 static int init_restart_lance(struct lance_private *lp)
527 {
528 	volatile struct lance_regs *ll = lp->ll;
529 	int i;
530 
531 	writereg(&ll->rap, LE_CSR0);
532 	writereg(&ll->rdp, LE_C0_INIT);
533 
534 	/* Wait for the lance to complete initialization */
535 	for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
536 		udelay(10);
537 	}
538 	if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
539 		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
540 		       i, ll->rdp);
541 		return -1;
542 	}
543 	if ((ll->rdp & LE_C0_ERR)) {
544 		printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
545 		       i, ll->rdp);
546 		return -1;
547 	}
548 	writereg(&ll->rdp, LE_C0_IDON);
549 	writereg(&ll->rdp, LE_C0_STRT);
550 	writereg(&ll->rdp, LE_C0_INEA);
551 
552 	return 0;
553 }
554 
555 static int lance_rx(struct net_device *dev)
556 {
557 	struct lance_private *lp = netdev_priv(dev);
558 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
559 	volatile u16 *rd;
560 	unsigned short bits;
561 	int entry, len;
562 	struct sk_buff *skb;
563 
564 #ifdef TEST_HITS
565 	{
566 		int i;
567 
568 		printk("[");
569 		for (i = 0; i < RX_RING_SIZE; i++) {
570 			if (i == lp->rx_new)
571 				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
572 						      lp->type) &
573 					     LE_R1_OWN ? "_" : "X");
574 			else
575 				printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
576 						      lp->type) &
577 					     LE_R1_OWN ? "." : "1");
578 		}
579 		printk("]");
580 	}
581 #endif
582 
583 	for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
584 	     !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
585 	     rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
586 		entry = lp->rx_new;
587 
588 		/* We got an incomplete frame? */
589 		if ((bits & LE_R1_POK) != LE_R1_POK) {
590 			dev->stats.rx_over_errors++;
591 			dev->stats.rx_errors++;
592 		} else if (bits & LE_R1_ERR) {
593 			/* Count only the end frame as a rx error,
594 			 * not the beginning
595 			 */
596 			if (bits & LE_R1_BUF)
597 				dev->stats.rx_fifo_errors++;
598 			if (bits & LE_R1_CRC)
599 				dev->stats.rx_crc_errors++;
600 			if (bits & LE_R1_OFL)
601 				dev->stats.rx_over_errors++;
602 			if (bits & LE_R1_FRA)
603 				dev->stats.rx_frame_errors++;
604 			if (bits & LE_R1_EOP)
605 				dev->stats.rx_errors++;
606 		} else {
607 			len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
608 			skb = netdev_alloc_skb(dev, len + 2);
609 
610 			if (skb == 0) {
611 				dev->stats.rx_dropped++;
612 				*rds_ptr(rd, mblength, lp->type) = 0;
613 				*rds_ptr(rd, rmd1, lp->type) =
614 					((lp->rx_buf_ptr_lnc[entry] >> 16) &
615 					 0xff) | LE_R1_OWN;
616 				lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
617 				return 0;
618 			}
619 			dev->stats.rx_bytes += len;
620 
621 			skb_reserve(skb, 2);	/* 16 byte align */
622 			skb_put(skb, len);	/* make room */
623 
624 			cp_from_buf(lp->type, skb->data,
625 				    lp->rx_buf_ptr_cpu[entry], len);
626 
627 			skb->protocol = eth_type_trans(skb, dev);
628 			netif_rx(skb);
629 			dev->stats.rx_packets++;
630 		}
631 
632 		/* Return the packet to the pool */
633 		*rds_ptr(rd, mblength, lp->type) = 0;
634 		*rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
635 		*rds_ptr(rd, rmd1, lp->type) =
636 			((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
637 		lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
638 	}
639 	return 0;
640 }
641 
642 static void lance_tx(struct net_device *dev)
643 {
644 	struct lance_private *lp = netdev_priv(dev);
645 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
646 	volatile struct lance_regs *ll = lp->ll;
647 	volatile u16 *td;
648 	int i, j;
649 	int status;
650 
651 	j = lp->tx_old;
652 
653 	spin_lock(&lp->lock);
654 
655 	for (i = j; i != lp->tx_new; i = j) {
656 		td = lib_ptr(ib, btx_ring[i], lp->type);
657 		/* If we hit a packet not owned by us, stop */
658 		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
659 			break;
660 
661 		if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
662 			status = *tds_ptr(td, misc, lp->type);
663 
664 			dev->stats.tx_errors++;
665 			if (status & LE_T3_RTY)
666 				dev->stats.tx_aborted_errors++;
667 			if (status & LE_T3_LCOL)
668 				dev->stats.tx_window_errors++;
669 
670 			if (status & LE_T3_CLOS) {
671 				dev->stats.tx_carrier_errors++;
672 				printk("%s: Carrier Lost\n", dev->name);
673 				/* Stop the lance */
674 				writereg(&ll->rap, LE_CSR0);
675 				writereg(&ll->rdp, LE_C0_STOP);
676 				lance_init_ring(dev);
677 				load_csrs(lp);
678 				init_restart_lance(lp);
679 				goto out;
680 			}
681 			/* Buffer errors and underflows turn off the
682 			 * transmitter, restart the adapter.
683 			 */
684 			if (status & (LE_T3_BUF | LE_T3_UFL)) {
685 				dev->stats.tx_fifo_errors++;
686 
687 				printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
688 				       dev->name);
689 				/* Stop the lance */
690 				writereg(&ll->rap, LE_CSR0);
691 				writereg(&ll->rdp, LE_C0_STOP);
692 				lance_init_ring(dev);
693 				load_csrs(lp);
694 				init_restart_lance(lp);
695 				goto out;
696 			}
697 		} else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
698 			   LE_T1_POK) {
699 			/*
700 			 * So we don't count the packet more than once.
701 			 */
702 			*tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
703 
704 			/* One collision before packet was sent. */
705 			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
706 				dev->stats.collisions++;
707 
708 			/* More than one collision, be optimistic. */
709 			if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
710 				dev->stats.collisions += 2;
711 
712 			dev->stats.tx_packets++;
713 		}
714 		j = (j + 1) & TX_RING_MOD_MASK;
715 	}
716 	lp->tx_old = j;
717 out:
718 	if (netif_queue_stopped(dev) &&
719 	    TX_BUFFS_AVAIL > 0)
720 		netif_wake_queue(dev);
721 
722 	spin_unlock(&lp->lock);
723 }
724 
725 static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
726 {
727 	struct net_device *dev = dev_id;
728 
729 	printk(KERN_ERR "%s: DMA error\n", dev->name);
730 	return IRQ_HANDLED;
731 }
732 
733 static irqreturn_t lance_interrupt(int irq, void *dev_id)
734 {
735 	struct net_device *dev = dev_id;
736 	struct lance_private *lp = netdev_priv(dev);
737 	volatile struct lance_regs *ll = lp->ll;
738 	int csr0;
739 
740 	writereg(&ll->rap, LE_CSR0);
741 	csr0 = ll->rdp;
742 
743 	/* Acknowledge all the interrupt sources ASAP */
744 	writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
745 
746 	if ((csr0 & LE_C0_ERR)) {
747 		/* Clear the error condition */
748 		writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
749 			 LE_C0_CERR | LE_C0_MERR);
750 	}
751 	if (csr0 & LE_C0_RINT)
752 		lance_rx(dev);
753 
754 	if (csr0 & LE_C0_TINT)
755 		lance_tx(dev);
756 
757 	if (csr0 & LE_C0_BABL)
758 		dev->stats.tx_errors++;
759 
760 	if (csr0 & LE_C0_MISS)
761 		dev->stats.rx_errors++;
762 
763 	if (csr0 & LE_C0_MERR) {
764 		printk("%s: Memory error, status %04x\n", dev->name, csr0);
765 
766 		writereg(&ll->rdp, LE_C0_STOP);
767 
768 		lance_init_ring(dev);
769 		load_csrs(lp);
770 		init_restart_lance(lp);
771 		netif_wake_queue(dev);
772 	}
773 
774 	writereg(&ll->rdp, LE_C0_INEA);
775 	writereg(&ll->rdp, LE_C0_INEA);
776 	return IRQ_HANDLED;
777 }
778 
779 static int lance_open(struct net_device *dev)
780 {
781 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
782 	struct lance_private *lp = netdev_priv(dev);
783 	volatile struct lance_regs *ll = lp->ll;
784 	int status = 0;
785 
786 	/* Stop the Lance */
787 	writereg(&ll->rap, LE_CSR0);
788 	writereg(&ll->rdp, LE_C0_STOP);
789 
790 	/* Set mode and clear multicast filter only at device open,
791 	 * so that lance_init_ring() called at any error will not
792 	 * forget multicast filters.
793 	 *
794 	 * BTW it is common bug in all lance drivers! --ANK
795 	 */
796 	*lib_ptr(ib, mode, lp->type) = 0;
797 	*lib_ptr(ib, filter[0], lp->type) = 0;
798 	*lib_ptr(ib, filter[1], lp->type) = 0;
799 	*lib_ptr(ib, filter[2], lp->type) = 0;
800 	*lib_ptr(ib, filter[3], lp->type) = 0;
801 
802 	lance_init_ring(dev);
803 	load_csrs(lp);
804 
805 	netif_start_queue(dev);
806 
807 	/* Associate IRQ with lance_interrupt */
808 	if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
809 		printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
810 		return -EAGAIN;
811 	}
812 	if (lp->dma_irq >= 0) {
813 		unsigned long flags;
814 
815 		if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
816 				"lance error", dev)) {
817 			free_irq(dev->irq, dev);
818 			printk("%s: Can't get DMA IRQ %d\n", dev->name,
819 				lp->dma_irq);
820 			return -EAGAIN;
821 		}
822 
823 		spin_lock_irqsave(&ioasic_ssr_lock, flags);
824 
825 		fast_mb();
826 		/* Enable I/O ASIC LANCE DMA.  */
827 		ioasic_write(IO_REG_SSR,
828 			     ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
829 
830 		fast_mb();
831 		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
832 	}
833 
834 	status = init_restart_lance(lp);
835 	return status;
836 }
837 
838 static int lance_close(struct net_device *dev)
839 {
840 	struct lance_private *lp = netdev_priv(dev);
841 	volatile struct lance_regs *ll = lp->ll;
842 
843 	netif_stop_queue(dev);
844 	del_timer_sync(&lp->multicast_timer);
845 
846 	/* Stop the card */
847 	writereg(&ll->rap, LE_CSR0);
848 	writereg(&ll->rdp, LE_C0_STOP);
849 
850 	if (lp->dma_irq >= 0) {
851 		unsigned long flags;
852 
853 		spin_lock_irqsave(&ioasic_ssr_lock, flags);
854 
855 		fast_mb();
856 		/* Disable I/O ASIC LANCE DMA.  */
857 		ioasic_write(IO_REG_SSR,
858 			     ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
859 
860 		fast_iob();
861 		spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
862 
863 		free_irq(lp->dma_irq, dev);
864 	}
865 	free_irq(dev->irq, dev);
866 	return 0;
867 }
868 
869 static inline int lance_reset(struct net_device *dev)
870 {
871 	struct lance_private *lp = netdev_priv(dev);
872 	volatile struct lance_regs *ll = lp->ll;
873 	int status;
874 
875 	/* Stop the lance */
876 	writereg(&ll->rap, LE_CSR0);
877 	writereg(&ll->rdp, LE_C0_STOP);
878 
879 	lance_init_ring(dev);
880 	load_csrs(lp);
881 	netif_trans_update(dev); /* prevent tx timeout */
882 	status = init_restart_lance(lp);
883 	return status;
884 }
885 
886 static void lance_tx_timeout(struct net_device *dev)
887 {
888 	struct lance_private *lp = netdev_priv(dev);
889 	volatile struct lance_regs *ll = lp->ll;
890 
891 	printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
892 		dev->name, ll->rdp);
893 	lance_reset(dev);
894 	netif_wake_queue(dev);
895 }
896 
897 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
898 {
899 	struct lance_private *lp = netdev_priv(dev);
900 	volatile struct lance_regs *ll = lp->ll;
901 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
902 	unsigned long flags;
903 	int entry, len;
904 
905 	len = skb->len;
906 
907 	if (len < ETH_ZLEN) {
908 		if (skb_padto(skb, ETH_ZLEN))
909 			return NETDEV_TX_OK;
910 		len = ETH_ZLEN;
911 	}
912 
913 	dev->stats.tx_bytes += len;
914 
915 	spin_lock_irqsave(&lp->lock, flags);
916 
917 	entry = lp->tx_new;
918 	*lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
919 	*lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
920 
921 	cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
922 
923 	/* Now, give the packet to the lance */
924 	*lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
925 		((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
926 		(LE_T1_POK | LE_T1_OWN);
927 	lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
928 
929 	if (TX_BUFFS_AVAIL <= 0)
930 		netif_stop_queue(dev);
931 
932 	/* Kick the lance: transmit now */
933 	writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
934 
935 	spin_unlock_irqrestore(&lp->lock, flags);
936 
937 	dev_kfree_skb(skb);
938 
939  	return NETDEV_TX_OK;
940 }
941 
942 static void lance_load_multicast(struct net_device *dev)
943 {
944 	struct lance_private *lp = netdev_priv(dev);
945 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
946 	struct netdev_hw_addr *ha;
947 	u32 crc;
948 
949 	/* set all multicast bits */
950 	if (dev->flags & IFF_ALLMULTI) {
951 		*lib_ptr(ib, filter[0], lp->type) = 0xffff;
952 		*lib_ptr(ib, filter[1], lp->type) = 0xffff;
953 		*lib_ptr(ib, filter[2], lp->type) = 0xffff;
954 		*lib_ptr(ib, filter[3], lp->type) = 0xffff;
955 		return;
956 	}
957 	/* clear the multicast filter */
958 	*lib_ptr(ib, filter[0], lp->type) = 0;
959 	*lib_ptr(ib, filter[1], lp->type) = 0;
960 	*lib_ptr(ib, filter[2], lp->type) = 0;
961 	*lib_ptr(ib, filter[3], lp->type) = 0;
962 
963 	/* Add addresses */
964 	netdev_for_each_mc_addr(ha, dev) {
965 		crc = ether_crc_le(ETH_ALEN, ha->addr);
966 		crc = crc >> 26;
967 		*lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
968 	}
969 }
970 
971 static void lance_set_multicast(struct net_device *dev)
972 {
973 	struct lance_private *lp = netdev_priv(dev);
974 	volatile u16 *ib = (volatile u16 *)dev->mem_start;
975 	volatile struct lance_regs *ll = lp->ll;
976 
977 	if (!netif_running(dev))
978 		return;
979 
980 	if (lp->tx_old != lp->tx_new) {
981 		mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
982 		netif_wake_queue(dev);
983 		return;
984 	}
985 
986 	netif_stop_queue(dev);
987 
988 	writereg(&ll->rap, LE_CSR0);
989 	writereg(&ll->rdp, LE_C0_STOP);
990 
991 	lance_init_ring(dev);
992 
993 	if (dev->flags & IFF_PROMISC) {
994 		*lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
995 	} else {
996 		*lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
997 		lance_load_multicast(dev);
998 	}
999 	load_csrs(lp);
1000 	init_restart_lance(lp);
1001 	netif_wake_queue(dev);
1002 }
1003 
1004 static void lance_set_multicast_retry(struct timer_list *t)
1005 {
1006 	struct lance_private *lp = from_timer(lp, t, multicast_timer);
1007 	struct net_device *dev = lp->dev;
1008 
1009 	lance_set_multicast(dev);
1010 }
1011 
1012 static const struct net_device_ops lance_netdev_ops = {
1013 	.ndo_open		= lance_open,
1014 	.ndo_stop		= lance_close,
1015 	.ndo_start_xmit		= lance_start_xmit,
1016 	.ndo_tx_timeout		= lance_tx_timeout,
1017 	.ndo_set_rx_mode	= lance_set_multicast,
1018 	.ndo_validate_addr	= eth_validate_addr,
1019 	.ndo_set_mac_address	= eth_mac_addr,
1020 };
1021 
1022 static int dec_lance_probe(struct device *bdev, const int type)
1023 {
1024 	static unsigned version_printed;
1025 	static const char fmt[] = "declance%d";
1026 	char name[10];
1027 	struct net_device *dev;
1028 	struct lance_private *lp;
1029 	volatile struct lance_regs *ll;
1030 	resource_size_t start = 0, len = 0;
1031 	int i, ret;
1032 	unsigned long esar_base;
1033 	unsigned char *esar;
1034 	const char *desc;
1035 
1036 	if (dec_lance_debug && version_printed++ == 0)
1037 		printk(version);
1038 
1039 	if (bdev)
1040 		snprintf(name, sizeof(name), "%s", dev_name(bdev));
1041 	else {
1042 		i = 0;
1043 		dev = root_lance_dev;
1044 		while (dev) {
1045 			i++;
1046 			lp = netdev_priv(dev);
1047 			dev = lp->next;
1048 		}
1049 		snprintf(name, sizeof(name), fmt, i);
1050 	}
1051 
1052 	dev = alloc_etherdev(sizeof(struct lance_private));
1053 	if (!dev) {
1054 		ret = -ENOMEM;
1055 		goto err_out;
1056 	}
1057 
1058 	/*
1059 	 * alloc_etherdev ensures the data structures used by the LANCE
1060 	 * are aligned.
1061 	 */
1062 	lp = netdev_priv(dev);
1063 	spin_lock_init(&lp->lock);
1064 
1065 	lp->type = type;
1066 	switch (type) {
1067 	case ASIC_LANCE:
1068 		dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1069 
1070 		/* buffer space for the on-board LANCE shared memory */
1071 		/*
1072 		 * FIXME: ugly hack!
1073 		 */
1074 		dev->mem_start = CKSEG1ADDR(0x00020000);
1075 		dev->mem_end = dev->mem_start + 0x00020000;
1076 		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1077 		esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1078 
1079 		/* Workaround crash with booting KN04 2.1k from Disk */
1080 		memset((void *)dev->mem_start, 0,
1081 		       dev->mem_end - dev->mem_start);
1082 
1083 		/*
1084 		 * setup the pointer arrays, this sucks [tm] :-(
1085 		 */
1086 		for (i = 0; i < RX_RING_SIZE; i++) {
1087 			lp->rx_buf_ptr_cpu[i] =
1088 				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1089 					 2 * i * RX_BUFF_SIZE);
1090 			lp->rx_buf_ptr_lnc[i] =
1091 				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1092 		}
1093 		for (i = 0; i < TX_RING_SIZE; i++) {
1094 			lp->tx_buf_ptr_cpu[i] =
1095 				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1096 					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1097 					 2 * i * TX_BUFF_SIZE);
1098 			lp->tx_buf_ptr_lnc[i] =
1099 				(BUF_OFFSET_LNC +
1100 				 RX_RING_SIZE * RX_BUFF_SIZE +
1101 				 i * TX_BUFF_SIZE);
1102 		}
1103 
1104 		/* Setup I/O ASIC LANCE DMA.  */
1105 		lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1106 		ioasic_write(IO_REG_LANCE_DMA_P,
1107 			     CPHYSADDR(dev->mem_start) << 3);
1108 
1109 		break;
1110 #ifdef CONFIG_TC
1111 	case PMAD_LANCE:
1112 		dev_set_drvdata(bdev, dev);
1113 
1114 		start = to_tc_dev(bdev)->resource.start;
1115 		len = to_tc_dev(bdev)->resource.end - start + 1;
1116 		if (!request_mem_region(start, len, dev_name(bdev))) {
1117 			printk(KERN_ERR
1118 			       "%s: Unable to reserve MMIO resource\n",
1119 			       dev_name(bdev));
1120 			ret = -EBUSY;
1121 			goto err_out_dev;
1122 		}
1123 
1124 		dev->mem_start = CKSEG1ADDR(start);
1125 		dev->mem_end = dev->mem_start + 0x100000;
1126 		dev->base_addr = dev->mem_start + 0x100000;
1127 		dev->irq = to_tc_dev(bdev)->interrupt;
1128 		esar_base = dev->mem_start + 0x1c0002;
1129 		lp->dma_irq = -1;
1130 
1131 		for (i = 0; i < RX_RING_SIZE; i++) {
1132 			lp->rx_buf_ptr_cpu[i] =
1133 				(char *)(dev->mem_start + BUF_OFFSET_CPU +
1134 					 i * RX_BUFF_SIZE);
1135 			lp->rx_buf_ptr_lnc[i] =
1136 				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1137 		}
1138 		for (i = 0; i < TX_RING_SIZE; i++) {
1139 			lp->tx_buf_ptr_cpu[i] =
1140 				(char *)(dev->mem_start + BUF_OFFSET_CPU +
1141 					 RX_RING_SIZE * RX_BUFF_SIZE +
1142 					 i * TX_BUFF_SIZE);
1143 			lp->tx_buf_ptr_lnc[i] =
1144 				(BUF_OFFSET_LNC +
1145 				 RX_RING_SIZE * RX_BUFF_SIZE +
1146 				 i * TX_BUFF_SIZE);
1147 		}
1148 
1149 		break;
1150 #endif
1151 	case PMAX_LANCE:
1152 		dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1153 		dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1154 		dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1155 		dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1156 		esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1157 		lp->dma_irq = -1;
1158 
1159 		/*
1160 		 * setup the pointer arrays, this sucks [tm] :-(
1161 		 */
1162 		for (i = 0; i < RX_RING_SIZE; i++) {
1163 			lp->rx_buf_ptr_cpu[i] =
1164 				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1165 					 2 * i * RX_BUFF_SIZE);
1166 			lp->rx_buf_ptr_lnc[i] =
1167 				(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1168 		}
1169 		for (i = 0; i < TX_RING_SIZE; i++) {
1170 			lp->tx_buf_ptr_cpu[i] =
1171 				(char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1172 					 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1173 					 2 * i * TX_BUFF_SIZE);
1174 			lp->tx_buf_ptr_lnc[i] =
1175 				(BUF_OFFSET_LNC +
1176 				 RX_RING_SIZE * RX_BUFF_SIZE +
1177 				 i * TX_BUFF_SIZE);
1178 		}
1179 
1180 		break;
1181 
1182 	default:
1183 		printk(KERN_ERR "%s: declance_init called with unknown type\n",
1184 			name);
1185 		ret = -ENODEV;
1186 		goto err_out_dev;
1187 	}
1188 
1189 	ll = (struct lance_regs *) dev->base_addr;
1190 	esar = (unsigned char *) esar_base;
1191 
1192 	/* prom checks */
1193 	/* First, check for test pattern */
1194 	if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1195 	    esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1196 		printk(KERN_ERR
1197 			"%s: Ethernet station address prom not found!\n",
1198 			name);
1199 		ret = -ENODEV;
1200 		goto err_out_resource;
1201 	}
1202 	/* Check the prom contents */
1203 	for (i = 0; i < 8; i++) {
1204 		if (esar[i * 4] != esar[0x3c - i * 4] &&
1205 		    esar[i * 4] != esar[0x40 + i * 4] &&
1206 		    esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1207 			printk(KERN_ERR "%s: Something is wrong with the "
1208 				"ethernet station address prom!\n", name);
1209 			ret = -ENODEV;
1210 			goto err_out_resource;
1211 		}
1212 	}
1213 
1214 	/* Copy the ethernet address to the device structure, later to the
1215 	 * lance initialization block so the lance gets it every time it's
1216 	 * (re)initialized.
1217 	 */
1218 	switch (type) {
1219 	case ASIC_LANCE:
1220 		desc = "IOASIC onboard LANCE";
1221 		break;
1222 	case PMAD_LANCE:
1223 		desc = "PMAD-AA";
1224 		break;
1225 	case PMAX_LANCE:
1226 		desc = "PMAX onboard LANCE";
1227 		break;
1228 	}
1229 	for (i = 0; i < 6; i++)
1230 		dev->dev_addr[i] = esar[i * 4];
1231 
1232 	printk("%s: %s, addr = %pM, irq = %d\n",
1233 	       name, desc, dev->dev_addr, dev->irq);
1234 
1235 	dev->netdev_ops = &lance_netdev_ops;
1236 	dev->watchdog_timeo = 5*HZ;
1237 
1238 	/* lp->ll is the location of the registers for lance card */
1239 	lp->ll = ll;
1240 
1241 	/* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1242 	 * specification.
1243 	 */
1244 	lp->busmaster_regval = 0;
1245 
1246 	dev->dma = 0;
1247 
1248 	/* We cannot sleep if the chip is busy during a
1249 	 * multicast list update event, because such events
1250 	 * can occur from interrupts (ex. IPv6).  So we
1251 	 * use a timer to try again later when necessary. -DaveM
1252 	 */
1253 	lp->dev = dev;
1254 	timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1255 
1256 
1257 	ret = register_netdev(dev);
1258 	if (ret) {
1259 		printk(KERN_ERR
1260 			"%s: Unable to register netdev, aborting.\n", name);
1261 		goto err_out_resource;
1262 	}
1263 
1264 	if (!bdev) {
1265 		lp->next = root_lance_dev;
1266 		root_lance_dev = dev;
1267 	}
1268 
1269 	printk("%s: registered as %s.\n", name, dev->name);
1270 	return 0;
1271 
1272 err_out_resource:
1273 	if (bdev)
1274 		release_mem_region(start, len);
1275 
1276 err_out_dev:
1277 	free_netdev(dev);
1278 
1279 err_out:
1280 	return ret;
1281 }
1282 
1283 /* Find all the lance cards on the system and initialize them */
1284 static int __init dec_lance_platform_probe(void)
1285 {
1286 	int count = 0;
1287 
1288 	if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1289 		if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1290 			if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1291 				count++;
1292 		} else if (!TURBOCHANNEL) {
1293 			if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1294 				count++;
1295 		}
1296 	}
1297 
1298 	return (count > 0) ? 0 : -ENODEV;
1299 }
1300 
1301 static void __exit dec_lance_platform_remove(void)
1302 {
1303 	while (root_lance_dev) {
1304 		struct net_device *dev = root_lance_dev;
1305 		struct lance_private *lp = netdev_priv(dev);
1306 
1307 		unregister_netdev(dev);
1308 		root_lance_dev = lp->next;
1309 		free_netdev(dev);
1310 	}
1311 }
1312 
1313 #ifdef CONFIG_TC
1314 static int dec_lance_tc_probe(struct device *dev);
1315 static int dec_lance_tc_remove(struct device *dev);
1316 
1317 static const struct tc_device_id dec_lance_tc_table[] = {
1318 	{ "DEC     ", "PMAD-AA " },
1319 	{ }
1320 };
1321 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1322 
1323 static struct tc_driver dec_lance_tc_driver = {
1324 	.id_table	= dec_lance_tc_table,
1325 	.driver		= {
1326 		.name	= "declance",
1327 		.bus	= &tc_bus_type,
1328 		.probe	= dec_lance_tc_probe,
1329 		.remove	= dec_lance_tc_remove,
1330 	},
1331 };
1332 
1333 static int dec_lance_tc_probe(struct device *dev)
1334 {
1335         int status = dec_lance_probe(dev, PMAD_LANCE);
1336         if (!status)
1337                 get_device(dev);
1338         return status;
1339 }
1340 
1341 static void dec_lance_remove(struct device *bdev)
1342 {
1343 	struct net_device *dev = dev_get_drvdata(bdev);
1344 	resource_size_t start, len;
1345 
1346 	unregister_netdev(dev);
1347 	start = to_tc_dev(bdev)->resource.start;
1348 	len = to_tc_dev(bdev)->resource.end - start + 1;
1349 	release_mem_region(start, len);
1350 	free_netdev(dev);
1351 }
1352 
1353 static int dec_lance_tc_remove(struct device *dev)
1354 {
1355         put_device(dev);
1356         dec_lance_remove(dev);
1357         return 0;
1358 }
1359 #endif
1360 
1361 static int __init dec_lance_init(void)
1362 {
1363 	int status;
1364 
1365 	status = tc_register_driver(&dec_lance_tc_driver);
1366 	if (!status)
1367 		dec_lance_platform_probe();
1368 	return status;
1369 }
1370 
1371 static void __exit dec_lance_exit(void)
1372 {
1373 	dec_lance_platform_remove();
1374 	tc_unregister_driver(&dec_lance_tc_driver);
1375 }
1376 
1377 
1378 module_init(dec_lance_init);
1379 module_exit(dec_lance_exit);
1380