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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Lance ethernet driver for the MIPS processor based
4 * DECstation family
5 *
6 *
7 * adopted from sunlance.c by Richard van den Berg
8 *
9 * Copyright (C) 2002, 2003, 2005, 2006 Maciej W. Rozycki
10 *
11 * additional sources:
12 * - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
13 * Revision 1.2
14 *
15 * History:
16 *
17 * v0.001: The kernel accepts the code and it shows the hardware address.
18 *
19 * v0.002: Removed most sparc stuff, left only some module and dma stuff.
20 *
21 * v0.003: Enhanced base address calculation from proposals by
22 * Harald Koerfgen and Thomas Riemer.
23 *
24 * v0.004: lance-regs is pointing at the right addresses, added prom
25 * check. First start of address mapping and DMA.
26 *
27 * v0.005: started to play around with LANCE-DMA. This driver will not
28 * work for non IOASIC lances. HK
29 *
30 * v0.006: added pointer arrays to lance_private and setup routine for
31 * them in dec_lance_init. HK
32 *
33 * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
34 * access the init block. This looks like one (short) word at a
35 * time, but the smallest amount the IOASIC can transfer is a
36 * (long) word. So we have a 2-2 padding here. Changed
37 * lance_init_block accordingly. The 16-16 padding for the buffers
38 * seems to be correct. HK
39 *
40 * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
41 *
42 * v0.009: Module support fixes, multiple interfaces support, various
43 * bits. macro
44 *
45 * v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
46 * PMAX requirement to only use halfword accesses to the
47 * buffer. macro
48 *
49 * v0.011: Converted the PMAD to the driver model. macro
50 */
51
52#include <linux/crc32.h>
53#include <linux/delay.h>
54#include <linux/errno.h>
55#include <linux/if_ether.h>
56#include <linux/init.h>
57#include <linux/kernel.h>
58#include <linux/module.h>
59#include <linux/netdevice.h>
60#include <linux/etherdevice.h>
61#include <linux/spinlock.h>
62#include <linux/stddef.h>
63#include <linux/string.h>
64#include <linux/tc.h>
65#include <linux/types.h>
66
67#include <asm/addrspace.h>
68
69#include <asm/dec/interrupts.h>
70#include <asm/dec/ioasic.h>
71#include <asm/dec/ioasic_addrs.h>
72#include <asm/dec/kn01.h>
73#include <asm/dec/machtype.h>
74#include <asm/dec/system.h>
75
76static const char version[] =
77"declance.c: v0.011 by Linux MIPS DECstation task force\n";
78
79MODULE_AUTHOR("Linux MIPS DECstation task force");
80MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
81MODULE_LICENSE("GPL");
82
83#define __unused __attribute__ ((unused))
84
85/*
86 * card types
87 */
88#define ASIC_LANCE 1
89#define PMAD_LANCE 2
90#define PMAX_LANCE 3
91
92
93#define LE_CSR0 0
94#define LE_CSR1 1
95#define LE_CSR2 2
96#define LE_CSR3 3
97
98#define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
99
100#define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
101#define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
102#define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
103#define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
104#define LE_C0_MERR 0x0800 /* ME: Memory error */
105#define LE_C0_RINT 0x0400 /* Received interrupt */
106#define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
107#define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
108#define LE_C0_INTR 0x0080 /* Interrupt or error */
109#define LE_C0_INEA 0x0040 /* Interrupt enable */
110#define LE_C0_RXON 0x0020 /* Receiver on */
111#define LE_C0_TXON 0x0010 /* Transmitter on */
112#define LE_C0_TDMD 0x0008 /* Transmitter demand */
113#define LE_C0_STOP 0x0004 /* Stop the card */
114#define LE_C0_STRT 0x0002 /* Start the card */
115#define LE_C0_INIT 0x0001 /* Init the card */
116
117#define LE_C3_BSWP 0x4 /* SWAP */
118#define LE_C3_ACON 0x2 /* ALE Control */
119#define LE_C3_BCON 0x1 /* Byte control */
120
121/* Receive message descriptor 1 */
122#define LE_R1_OWN 0x8000 /* Who owns the entry */
123#define LE_R1_ERR 0x4000 /* Error: if FRA, OFL, CRC or BUF is set */
124#define LE_R1_FRA 0x2000 /* FRA: Frame error */
125#define LE_R1_OFL 0x1000 /* OFL: Frame overflow */
126#define LE_R1_CRC 0x0800 /* CRC error */
127#define LE_R1_BUF 0x0400 /* BUF: Buffer error */
128#define LE_R1_SOP 0x0200 /* Start of packet */
129#define LE_R1_EOP 0x0100 /* End of packet */
130#define LE_R1_POK 0x0300 /* Packet is complete: SOP + EOP */
131
132/* Transmit message descriptor 1 */
133#define LE_T1_OWN 0x8000 /* Lance owns the packet */
134#define LE_T1_ERR 0x4000 /* Error summary */
135#define LE_T1_EMORE 0x1000 /* Error: more than one retry needed */
136#define LE_T1_EONE 0x0800 /* Error: one retry needed */
137#define LE_T1_EDEF 0x0400 /* Error: deferred */
138#define LE_T1_SOP 0x0200 /* Start of packet */
139#define LE_T1_EOP 0x0100 /* End of packet */
140#define LE_T1_POK 0x0300 /* Packet is complete: SOP + EOP */
141
142#define LE_T3_BUF 0x8000 /* Buffer error */
143#define LE_T3_UFL 0x4000 /* Error underflow */
144#define LE_T3_LCOL 0x1000 /* Error late collision */
145#define LE_T3_CLOS 0x0800 /* Error carrier loss */
146#define LE_T3_RTY 0x0400 /* Error retry */
147#define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
148
149/* Define: 2^4 Tx buffers and 2^4 Rx buffers */
150
151#ifndef LANCE_LOG_TX_BUFFERS
152#define LANCE_LOG_TX_BUFFERS 4
153#define LANCE_LOG_RX_BUFFERS 4
154#endif
155
156#define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
157#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
158
159#define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
160#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
161
162#define PKT_BUF_SZ 1536
163#define RX_BUFF_SIZE PKT_BUF_SZ
164#define TX_BUFF_SIZE PKT_BUF_SZ
165
166#undef TEST_HITS
167#define ZERO 0
168
169/*
170 * The DS2100/3100 have a linear 64 kB buffer which supports halfword
171 * accesses only. Each halfword of the buffer is word-aligned in the
172 * CPU address space.
173 *
174 * The PMAD-AA has a 128 kB buffer on-board.
175 *
176 * The IOASIC LANCE devices use a shared memory region. This region
177 * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
178 * boundary. The LANCE sees this as a 64 kB long continuous memory
179 * region.
180 *
181 * The LANCE's DMA address is used as an index in this buffer and DMA
182 * takes place in bursts of eight 16-bit words which are packed into
183 * four 32-bit words by the IOASIC. This leads to a strange padding:
184 * 16 bytes of valid data followed by a 16 byte gap :-(.
185 */
186
187struct lance_rx_desc {
188 unsigned short rmd0; /* low address of packet */
189 unsigned short rmd1; /* high address of packet
190 and descriptor bits */
191 short length; /* 2s complement (negative!)
192 of buffer length */
193 unsigned short mblength; /* actual number of bytes received */
194};
195
196struct lance_tx_desc {
197 unsigned short tmd0; /* low address of packet */
198 unsigned short tmd1; /* high address of packet
199 and descriptor bits */
200 short length; /* 2s complement (negative!)
201 of buffer length */
202 unsigned short misc;
203};
204
205
206/* First part of the LANCE initialization block, described in databook. */
207struct lance_init_block {
208 unsigned short mode; /* pre-set mode (reg. 15) */
209
210 unsigned short phys_addr[3]; /* physical ethernet address */
211 unsigned short filter[4]; /* multicast filter */
212
213 /* Receive and transmit ring base, along with extra bits. */
214 unsigned short rx_ptr; /* receive descriptor addr */
215 unsigned short rx_len; /* receive len and high addr */
216 unsigned short tx_ptr; /* transmit descriptor addr */
217 unsigned short tx_len; /* transmit len and high addr */
218
219 short gap[4];
220
221 /* The buffer descriptors */
222 struct lance_rx_desc brx_ring[RX_RING_SIZE];
223 struct lance_tx_desc btx_ring[TX_RING_SIZE];
224};
225
226#define BUF_OFFSET_CPU sizeof(struct lance_init_block)
227#define BUF_OFFSET_LNC sizeof(struct lance_init_block)
228
229#define shift_off(off, type) \
230 (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
231
232#define lib_off(rt, type) \
233 shift_off(offsetof(struct lance_init_block, rt), type)
234
235#define lib_ptr(ib, rt, type) \
236 ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
237
238#define rds_off(rt, type) \
239 shift_off(offsetof(struct lance_rx_desc, rt), type)
240
241#define rds_ptr(rd, rt, type) \
242 ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
243
244#define tds_off(rt, type) \
245 shift_off(offsetof(struct lance_tx_desc, rt), type)
246
247#define tds_ptr(td, rt, type) \
248 ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
249
250struct lance_private {
251 struct net_device *next;
252 int type;
253 int dma_irq;
254 volatile struct lance_regs *ll;
255
256 spinlock_t lock;
257
258 int rx_new, tx_new;
259 int rx_old, tx_old;
260
261 unsigned short busmaster_regval;
262
263 struct timer_list multicast_timer;
264 struct net_device *dev;
265
266 /* Pointers to the ring buffers as seen from the CPU */
267 char *rx_buf_ptr_cpu[RX_RING_SIZE];
268 char *tx_buf_ptr_cpu[TX_RING_SIZE];
269
270 /* Pointers to the ring buffers as seen from the LANCE */
271 uint rx_buf_ptr_lnc[RX_RING_SIZE];
272 uint tx_buf_ptr_lnc[TX_RING_SIZE];
273};
274
275#define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
276 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
277 lp->tx_old - lp->tx_new-1)
278
279/* The lance control ports are at an absolute address, machine and tc-slot
280 * dependent.
281 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
282 * so we have to give the structure an extra member making rap pointing
283 * at the right address
284 */
285struct lance_regs {
286 volatile unsigned short rdp; /* register data port */
287 unsigned short pad;
288 volatile unsigned short rap; /* register address port */
289};
290
291int dec_lance_debug = 2;
292
293static struct tc_driver dec_lance_tc_driver;
294static struct net_device *root_lance_dev;
295
296static inline void writereg(volatile unsigned short *regptr, short value)
297{
298 *regptr = value;
299 iob();
300}
301
302/* Load the CSR registers */
303static void load_csrs(struct lance_private *lp)
304{
305 volatile struct lance_regs *ll = lp->ll;
306 uint leptr;
307
308 /* The address space as seen from the LANCE
309 * begins at address 0. HK
310 */
311 leptr = 0;
312
313 writereg(&ll->rap, LE_CSR1);
314 writereg(&ll->rdp, (leptr & 0xFFFF));
315 writereg(&ll->rap, LE_CSR2);
316 writereg(&ll->rdp, leptr >> 16);
317 writereg(&ll->rap, LE_CSR3);
318 writereg(&ll->rdp, lp->busmaster_regval);
319
320 /* Point back to csr0 */
321 writereg(&ll->rap, LE_CSR0);
322}
323
324/*
325 * Our specialized copy routines
326 *
327 */
328static void cp_to_buf(const int type, void *to, const void *from, int len)
329{
330 unsigned short *tp;
331 const unsigned short *fp;
332 unsigned short clen;
333 unsigned char *rtp;
334 const unsigned char *rfp;
335
336 if (type == PMAD_LANCE) {
337 memcpy(to, from, len);
338 } else if (type == PMAX_LANCE) {
339 clen = len >> 1;
340 tp = to;
341 fp = from;
342
343 while (clen--) {
344 *tp++ = *fp++;
345 tp++;
346 }
347
348 clen = len & 1;
349 rtp = (unsigned char *)tp;
350 rfp = (const unsigned char *)fp;
351 while (clen--) {
352 *rtp++ = *rfp++;
353 }
354 } else {
355 /*
356 * copy 16 Byte chunks
357 */
358 clen = len >> 4;
359 tp = to;
360 fp = from;
361 while (clen--) {
362 *tp++ = *fp++;
363 *tp++ = *fp++;
364 *tp++ = *fp++;
365 *tp++ = *fp++;
366 *tp++ = *fp++;
367 *tp++ = *fp++;
368 *tp++ = *fp++;
369 *tp++ = *fp++;
370 tp += 8;
371 }
372
373 /*
374 * do the rest, if any.
375 */
376 clen = len & 15;
377 rtp = (unsigned char *)tp;
378 rfp = (const unsigned char *)fp;
379 while (clen--) {
380 *rtp++ = *rfp++;
381 }
382 }
383
384 iob();
385}
386
387static void cp_from_buf(const int type, void *to, const void *from, int len)
388{
389 unsigned short *tp;
390 const unsigned short *fp;
391 unsigned short clen;
392 unsigned char *rtp;
393 const unsigned char *rfp;
394
395 if (type == PMAD_LANCE) {
396 memcpy(to, from, len);
397 } else if (type == PMAX_LANCE) {
398 clen = len >> 1;
399 tp = to;
400 fp = from;
401 while (clen--) {
402 *tp++ = *fp++;
403 fp++;
404 }
405
406 clen = len & 1;
407
408 rtp = (unsigned char *)tp;
409 rfp = (const unsigned char *)fp;
410
411 while (clen--) {
412 *rtp++ = *rfp++;
413 }
414 } else {
415
416 /*
417 * copy 16 Byte chunks
418 */
419 clen = len >> 4;
420 tp = to;
421 fp = from;
422 while (clen--) {
423 *tp++ = *fp++;
424 *tp++ = *fp++;
425 *tp++ = *fp++;
426 *tp++ = *fp++;
427 *tp++ = *fp++;
428 *tp++ = *fp++;
429 *tp++ = *fp++;
430 *tp++ = *fp++;
431 fp += 8;
432 }
433
434 /*
435 * do the rest, if any.
436 */
437 clen = len & 15;
438 rtp = (unsigned char *)tp;
439 rfp = (const unsigned char *)fp;
440 while (clen--) {
441 *rtp++ = *rfp++;
442 }
443
444
445 }
446
447}
448
449/* Setup the Lance Rx and Tx rings */
450static void lance_init_ring(struct net_device *dev)
451{
452 struct lance_private *lp = netdev_priv(dev);
453 volatile u16 *ib = (volatile u16 *)dev->mem_start;
454 uint leptr;
455 int i;
456
457 /* Lock out other processes while setting up hardware */
458 netif_stop_queue(dev);
459 lp->rx_new = lp->tx_new = 0;
460 lp->rx_old = lp->tx_old = 0;
461
462 /* Copy the ethernet address to the lance init block.
463 * XXX bit 0 of the physical address registers has to be zero
464 */
465 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
466 dev->dev_addr[0];
467 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
468 dev->dev_addr[2];
469 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
470 dev->dev_addr[4];
471 /* Setup the initialization block */
472
473 /* Setup rx descriptor pointer */
474 leptr = offsetof(struct lance_init_block, brx_ring);
475 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
476 (leptr >> 16);
477 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
478 if (ZERO)
479 printk("RX ptr: %8.8x(%8.8x)\n",
480 leptr, (uint)lib_off(brx_ring, lp->type));
481
482 /* Setup tx descriptor pointer */
483 leptr = offsetof(struct lance_init_block, btx_ring);
484 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
485 (leptr >> 16);
486 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
487 if (ZERO)
488 printk("TX ptr: %8.8x(%8.8x)\n",
489 leptr, (uint)lib_off(btx_ring, lp->type));
490
491 if (ZERO)
492 printk("TX rings:\n");
493
494 /* Setup the Tx ring entries */
495 for (i = 0; i < TX_RING_SIZE; i++) {
496 leptr = lp->tx_buf_ptr_lnc[i];
497 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
498 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
499 0xff;
500 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
501 /* The ones required by tmd2 */
502 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
503 if (i < 3 && ZERO)
504 printk("%d: %8.8x(%p)\n",
505 i, leptr, lp->tx_buf_ptr_cpu[i]);
506 }
507
508 /* Setup the Rx ring entries */
509 if (ZERO)
510 printk("RX rings:\n");
511 for (i = 0; i < RX_RING_SIZE; i++) {
512 leptr = lp->rx_buf_ptr_lnc[i];
513 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
514 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
515 0xff) |
516 LE_R1_OWN;
517 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
518 0xf000;
519 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
520 if (i < 3 && ZERO)
521 printk("%d: %8.8x(%p)\n",
522 i, leptr, lp->rx_buf_ptr_cpu[i]);
523 }
524 iob();
525}
526
527static int init_restart_lance(struct lance_private *lp)
528{
529 volatile struct lance_regs *ll = lp->ll;
530 int i;
531
532 writereg(&ll->rap, LE_CSR0);
533 writereg(&ll->rdp, LE_C0_INIT);
534
535 /* Wait for the lance to complete initialization */
536 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
537 udelay(10);
538 }
539 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
540 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
541 i, ll->rdp);
542 return -1;
543 }
544 if ((ll->rdp & LE_C0_ERR)) {
545 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
546 i, ll->rdp);
547 return -1;
548 }
549 writereg(&ll->rdp, LE_C0_IDON);
550 writereg(&ll->rdp, LE_C0_STRT);
551 writereg(&ll->rdp, LE_C0_INEA);
552
553 return 0;
554}
555
556static int lance_rx(struct net_device *dev)
557{
558 struct lance_private *lp = netdev_priv(dev);
559 volatile u16 *ib = (volatile u16 *)dev->mem_start;
560 volatile u16 *rd;
561 unsigned short bits;
562 int entry, len;
563 struct sk_buff *skb;
564
565#ifdef TEST_HITS
566 {
567 int i;
568
569 printk("[");
570 for (i = 0; i < RX_RING_SIZE; i++) {
571 if (i == lp->rx_new)
572 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
573 lp->type) &
574 LE_R1_OWN ? "_" : "X");
575 else
576 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
577 lp->type) &
578 LE_R1_OWN ? "." : "1");
579 }
580 printk("]");
581 }
582#endif
583
584 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
585 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
586 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
587 entry = lp->rx_new;
588
589 /* We got an incomplete frame? */
590 if ((bits & LE_R1_POK) != LE_R1_POK) {
591 dev->stats.rx_over_errors++;
592 dev->stats.rx_errors++;
593 } else if (bits & LE_R1_ERR) {
594 /* Count only the end frame as a rx error,
595 * not the beginning
596 */
597 if (bits & LE_R1_BUF)
598 dev->stats.rx_fifo_errors++;
599 if (bits & LE_R1_CRC)
600 dev->stats.rx_crc_errors++;
601 if (bits & LE_R1_OFL)
602 dev->stats.rx_over_errors++;
603 if (bits & LE_R1_FRA)
604 dev->stats.rx_frame_errors++;
605 if (bits & LE_R1_EOP)
606 dev->stats.rx_errors++;
607 } else {
608 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
609 skb = netdev_alloc_skb(dev, len + 2);
610
611 if (!skb) {
612 dev->stats.rx_dropped++;
613 *rds_ptr(rd, mblength, lp->type) = 0;
614 *rds_ptr(rd, rmd1, lp->type) =
615 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
616 0xff) | LE_R1_OWN;
617 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
618 return 0;
619 }
620 dev->stats.rx_bytes += len;
621
622 skb_reserve(skb, 2); /* 16 byte align */
623 skb_put(skb, len); /* make room */
624
625 cp_from_buf(lp->type, skb->data,
626 lp->rx_buf_ptr_cpu[entry], len);
627
628 skb->protocol = eth_type_trans(skb, dev);
629 netif_rx(skb);
630 dev->stats.rx_packets++;
631 }
632
633 /* Return the packet to the pool */
634 *rds_ptr(rd, mblength, lp->type) = 0;
635 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
636 *rds_ptr(rd, rmd1, lp->type) =
637 ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
638 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
639 }
640 return 0;
641}
642
643static void lance_tx(struct net_device *dev)
644{
645 struct lance_private *lp = netdev_priv(dev);
646 volatile u16 *ib = (volatile u16 *)dev->mem_start;
647 volatile struct lance_regs *ll = lp->ll;
648 volatile u16 *td;
649 int i, j;
650 int status;
651
652 j = lp->tx_old;
653
654 spin_lock(&lp->lock);
655
656 for (i = j; i != lp->tx_new; i = j) {
657 td = lib_ptr(ib, btx_ring[i], lp->type);
658 /* If we hit a packet not owned by us, stop */
659 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
660 break;
661
662 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
663 status = *tds_ptr(td, misc, lp->type);
664
665 dev->stats.tx_errors++;
666 if (status & LE_T3_RTY)
667 dev->stats.tx_aborted_errors++;
668 if (status & LE_T3_LCOL)
669 dev->stats.tx_window_errors++;
670
671 if (status & LE_T3_CLOS) {
672 dev->stats.tx_carrier_errors++;
673 printk("%s: Carrier Lost\n", dev->name);
674 /* Stop the lance */
675 writereg(&ll->rap, LE_CSR0);
676 writereg(&ll->rdp, LE_C0_STOP);
677 lance_init_ring(dev);
678 load_csrs(lp);
679 init_restart_lance(lp);
680 goto out;
681 }
682 /* Buffer errors and underflows turn off the
683 * transmitter, restart the adapter.
684 */
685 if (status & (LE_T3_BUF | LE_T3_UFL)) {
686 dev->stats.tx_fifo_errors++;
687
688 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
689 dev->name);
690 /* Stop the lance */
691 writereg(&ll->rap, LE_CSR0);
692 writereg(&ll->rdp, LE_C0_STOP);
693 lance_init_ring(dev);
694 load_csrs(lp);
695 init_restart_lance(lp);
696 goto out;
697 }
698 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
699 LE_T1_POK) {
700 /*
701 * So we don't count the packet more than once.
702 */
703 *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
704
705 /* One collision before packet was sent. */
706 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
707 dev->stats.collisions++;
708
709 /* More than one collision, be optimistic. */
710 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
711 dev->stats.collisions += 2;
712
713 dev->stats.tx_packets++;
714 }
715 j = (j + 1) & TX_RING_MOD_MASK;
716 }
717 lp->tx_old = j;
718out:
719 if (netif_queue_stopped(dev) &&
720 TX_BUFFS_AVAIL > 0)
721 netif_wake_queue(dev);
722
723 spin_unlock(&lp->lock);
724}
725
726static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
727{
728 struct net_device *dev = dev_id;
729
730 printk(KERN_ERR "%s: DMA error\n", dev->name);
731 return IRQ_HANDLED;
732}
733
734static irqreturn_t lance_interrupt(int irq, void *dev_id)
735{
736 struct net_device *dev = dev_id;
737 struct lance_private *lp = netdev_priv(dev);
738 volatile struct lance_regs *ll = lp->ll;
739 int csr0;
740
741 writereg(&ll->rap, LE_CSR0);
742 csr0 = ll->rdp;
743
744 /* Acknowledge all the interrupt sources ASAP */
745 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
746
747 if ((csr0 & LE_C0_ERR)) {
748 /* Clear the error condition */
749 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
750 LE_C0_CERR | LE_C0_MERR);
751 }
752 if (csr0 & LE_C0_RINT)
753 lance_rx(dev);
754
755 if (csr0 & LE_C0_TINT)
756 lance_tx(dev);
757
758 if (csr0 & LE_C0_BABL)
759 dev->stats.tx_errors++;
760
761 if (csr0 & LE_C0_MISS)
762 dev->stats.rx_errors++;
763
764 if (csr0 & LE_C0_MERR) {
765 printk("%s: Memory error, status %04x\n", dev->name, csr0);
766
767 writereg(&ll->rdp, LE_C0_STOP);
768
769 lance_init_ring(dev);
770 load_csrs(lp);
771 init_restart_lance(lp);
772 netif_wake_queue(dev);
773 }
774
775 writereg(&ll->rdp, LE_C0_INEA);
776 writereg(&ll->rdp, LE_C0_INEA);
777 return IRQ_HANDLED;
778}
779
780static int lance_open(struct net_device *dev)
781{
782 volatile u16 *ib = (volatile u16 *)dev->mem_start;
783 struct lance_private *lp = netdev_priv(dev);
784 volatile struct lance_regs *ll = lp->ll;
785 int status = 0;
786
787 /* Stop the Lance */
788 writereg(&ll->rap, LE_CSR0);
789 writereg(&ll->rdp, LE_C0_STOP);
790
791 /* Set mode and clear multicast filter only at device open,
792 * so that lance_init_ring() called at any error will not
793 * forget multicast filters.
794 *
795 * BTW it is common bug in all lance drivers! --ANK
796 */
797 *lib_ptr(ib, mode, lp->type) = 0;
798 *lib_ptr(ib, filter[0], lp->type) = 0;
799 *lib_ptr(ib, filter[1], lp->type) = 0;
800 *lib_ptr(ib, filter[2], lp->type) = 0;
801 *lib_ptr(ib, filter[3], lp->type) = 0;
802
803 lance_init_ring(dev);
804 load_csrs(lp);
805
806 netif_start_queue(dev);
807
808 /* Associate IRQ with lance_interrupt */
809 if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
810 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
811 return -EAGAIN;
812 }
813 if (lp->dma_irq >= 0) {
814 unsigned long flags;
815
816 if (request_irq(lp->dma_irq, lance_dma_merr_int, IRQF_ONESHOT,
817 "lance error", dev)) {
818 free_irq(dev->irq, dev);
819 printk("%s: Can't get DMA IRQ %d\n", dev->name,
820 lp->dma_irq);
821 return -EAGAIN;
822 }
823
824 spin_lock_irqsave(&ioasic_ssr_lock, flags);
825
826 fast_mb();
827 /* Enable I/O ASIC LANCE DMA. */
828 ioasic_write(IO_REG_SSR,
829 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
830
831 fast_mb();
832 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
833 }
834
835 status = init_restart_lance(lp);
836 return status;
837}
838
839static int lance_close(struct net_device *dev)
840{
841 struct lance_private *lp = netdev_priv(dev);
842 volatile struct lance_regs *ll = lp->ll;
843
844 netif_stop_queue(dev);
845 del_timer_sync(&lp->multicast_timer);
846
847 /* Stop the card */
848 writereg(&ll->rap, LE_CSR0);
849 writereg(&ll->rdp, LE_C0_STOP);
850
851 if (lp->dma_irq >= 0) {
852 unsigned long flags;
853
854 spin_lock_irqsave(&ioasic_ssr_lock, flags);
855
856 fast_mb();
857 /* Disable I/O ASIC LANCE DMA. */
858 ioasic_write(IO_REG_SSR,
859 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
860
861 fast_iob();
862 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
863
864 free_irq(lp->dma_irq, dev);
865 }
866 free_irq(dev->irq, dev);
867 return 0;
868}
869
870static inline int lance_reset(struct net_device *dev)
871{
872 struct lance_private *lp = netdev_priv(dev);
873 volatile struct lance_regs *ll = lp->ll;
874 int status;
875
876 /* Stop the lance */
877 writereg(&ll->rap, LE_CSR0);
878 writereg(&ll->rdp, LE_C0_STOP);
879
880 lance_init_ring(dev);
881 load_csrs(lp);
882 netif_trans_update(dev); /* prevent tx timeout */
883 status = init_restart_lance(lp);
884 return status;
885}
886
887static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
888{
889 struct lance_private *lp = netdev_priv(dev);
890 volatile struct lance_regs *ll = lp->ll;
891
892 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
893 dev->name, ll->rdp);
894 lance_reset(dev);
895 netif_wake_queue(dev);
896}
897
898static netdev_tx_t lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
899{
900 struct lance_private *lp = netdev_priv(dev);
901 volatile struct lance_regs *ll = lp->ll;
902 volatile u16 *ib = (volatile u16 *)dev->mem_start;
903 unsigned long flags;
904 int entry, len;
905
906 len = skb->len;
907
908 if (len < ETH_ZLEN) {
909 if (skb_padto(skb, ETH_ZLEN))
910 return NETDEV_TX_OK;
911 len = ETH_ZLEN;
912 }
913
914 dev->stats.tx_bytes += len;
915
916 spin_lock_irqsave(&lp->lock, flags);
917
918 entry = lp->tx_new;
919 *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
920 *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
921
922 cp_to_buf(lp->type, lp->tx_buf_ptr_cpu[entry], skb->data, len);
923
924 /* Now, give the packet to the lance */
925 *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
926 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
927 (LE_T1_POK | LE_T1_OWN);
928 lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
929
930 if (TX_BUFFS_AVAIL <= 0)
931 netif_stop_queue(dev);
932
933 /* Kick the lance: transmit now */
934 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
935
936 spin_unlock_irqrestore(&lp->lock, flags);
937
938 dev_kfree_skb(skb);
939
940 return NETDEV_TX_OK;
941}
942
943static void lance_load_multicast(struct net_device *dev)
944{
945 struct lance_private *lp = netdev_priv(dev);
946 volatile u16 *ib = (volatile u16 *)dev->mem_start;
947 struct netdev_hw_addr *ha;
948 u32 crc;
949
950 /* set all multicast bits */
951 if (dev->flags & IFF_ALLMULTI) {
952 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
953 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
954 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
955 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
956 return;
957 }
958 /* clear the multicast filter */
959 *lib_ptr(ib, filter[0], lp->type) = 0;
960 *lib_ptr(ib, filter[1], lp->type) = 0;
961 *lib_ptr(ib, filter[2], lp->type) = 0;
962 *lib_ptr(ib, filter[3], lp->type) = 0;
963
964 /* Add addresses */
965 netdev_for_each_mc_addr(ha, dev) {
966 crc = ether_crc_le(ETH_ALEN, ha->addr);
967 crc = crc >> 26;
968 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
969 }
970}
971
972static void lance_set_multicast(struct net_device *dev)
973{
974 struct lance_private *lp = netdev_priv(dev);
975 volatile u16 *ib = (volatile u16 *)dev->mem_start;
976 volatile struct lance_regs *ll = lp->ll;
977
978 if (!netif_running(dev))
979 return;
980
981 if (lp->tx_old != lp->tx_new) {
982 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
983 netif_wake_queue(dev);
984 return;
985 }
986
987 netif_stop_queue(dev);
988
989 writereg(&ll->rap, LE_CSR0);
990 writereg(&ll->rdp, LE_C0_STOP);
991
992 lance_init_ring(dev);
993
994 if (dev->flags & IFF_PROMISC) {
995 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
996 } else {
997 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
998 lance_load_multicast(dev);
999 }
1000 load_csrs(lp);
1001 init_restart_lance(lp);
1002 netif_wake_queue(dev);
1003}
1004
1005static void lance_set_multicast_retry(struct timer_list *t)
1006{
1007 struct lance_private *lp = from_timer(lp, t, multicast_timer);
1008 struct net_device *dev = lp->dev;
1009
1010 lance_set_multicast(dev);
1011}
1012
1013static const struct net_device_ops lance_netdev_ops = {
1014 .ndo_open = lance_open,
1015 .ndo_stop = lance_close,
1016 .ndo_start_xmit = lance_start_xmit,
1017 .ndo_tx_timeout = lance_tx_timeout,
1018 .ndo_set_rx_mode = lance_set_multicast,
1019 .ndo_validate_addr = eth_validate_addr,
1020 .ndo_set_mac_address = eth_mac_addr,
1021};
1022
1023static int dec_lance_probe(struct device *bdev, const int type)
1024{
1025 static unsigned version_printed;
1026 static const char fmt[] = "declance%d";
1027 char name[10];
1028 struct net_device *dev;
1029 struct lance_private *lp;
1030 volatile struct lance_regs *ll;
1031 resource_size_t start = 0, len = 0;
1032 int i, ret;
1033 unsigned long esar_base;
1034 unsigned char *esar;
1035 u8 addr[ETH_ALEN];
1036 const char *desc;
1037
1038 if (dec_lance_debug && version_printed++ == 0)
1039 printk(version);
1040
1041 if (bdev)
1042 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1043 else {
1044 i = 0;
1045 dev = root_lance_dev;
1046 while (dev) {
1047 i++;
1048 lp = netdev_priv(dev);
1049 dev = lp->next;
1050 }
1051 snprintf(name, sizeof(name), fmt, i);
1052 }
1053
1054 dev = alloc_etherdev(sizeof(struct lance_private));
1055 if (!dev) {
1056 ret = -ENOMEM;
1057 goto err_out;
1058 }
1059
1060 /*
1061 * alloc_etherdev ensures the data structures used by the LANCE
1062 * are aligned.
1063 */
1064 lp = netdev_priv(dev);
1065 spin_lock_init(&lp->lock);
1066
1067 lp->type = type;
1068 switch (type) {
1069 case ASIC_LANCE:
1070 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1071
1072 /* buffer space for the on-board LANCE shared memory */
1073 /*
1074 * FIXME: ugly hack!
1075 */
1076 dev->mem_start = CKSEG1ADDR(0x00020000);
1077 dev->mem_end = dev->mem_start + 0x00020000;
1078 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1079 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1080
1081 /* Workaround crash with booting KN04 2.1k from Disk */
1082 memset((void *)dev->mem_start, 0,
1083 dev->mem_end - dev->mem_start);
1084
1085 /*
1086 * setup the pointer arrays, this sucks [tm] :-(
1087 */
1088 for (i = 0; i < RX_RING_SIZE; i++) {
1089 lp->rx_buf_ptr_cpu[i] =
1090 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1091 2 * i * RX_BUFF_SIZE);
1092 lp->rx_buf_ptr_lnc[i] =
1093 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1094 }
1095 for (i = 0; i < TX_RING_SIZE; i++) {
1096 lp->tx_buf_ptr_cpu[i] =
1097 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1098 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1099 2 * i * TX_BUFF_SIZE);
1100 lp->tx_buf_ptr_lnc[i] =
1101 (BUF_OFFSET_LNC +
1102 RX_RING_SIZE * RX_BUFF_SIZE +
1103 i * TX_BUFF_SIZE);
1104 }
1105
1106 /* Setup I/O ASIC LANCE DMA. */
1107 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1108 ioasic_write(IO_REG_LANCE_DMA_P,
1109 CPHYSADDR(dev->mem_start) << 3);
1110
1111 break;
1112#ifdef CONFIG_TC
1113 case PMAD_LANCE:
1114 dev_set_drvdata(bdev, dev);
1115
1116 start = to_tc_dev(bdev)->resource.start;
1117 len = to_tc_dev(bdev)->resource.end - start + 1;
1118 if (!request_mem_region(start, len, dev_name(bdev))) {
1119 printk(KERN_ERR
1120 "%s: Unable to reserve MMIO resource\n",
1121 dev_name(bdev));
1122 ret = -EBUSY;
1123 goto err_out_dev;
1124 }
1125
1126 dev->mem_start = CKSEG1ADDR(start);
1127 dev->mem_end = dev->mem_start + 0x100000;
1128 dev->base_addr = dev->mem_start + 0x100000;
1129 dev->irq = to_tc_dev(bdev)->interrupt;
1130 esar_base = dev->mem_start + 0x1c0002;
1131 lp->dma_irq = -1;
1132
1133 for (i = 0; i < RX_RING_SIZE; i++) {
1134 lp->rx_buf_ptr_cpu[i] =
1135 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1136 i * RX_BUFF_SIZE);
1137 lp->rx_buf_ptr_lnc[i] =
1138 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1139 }
1140 for (i = 0; i < TX_RING_SIZE; i++) {
1141 lp->tx_buf_ptr_cpu[i] =
1142 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1143 RX_RING_SIZE * RX_BUFF_SIZE +
1144 i * TX_BUFF_SIZE);
1145 lp->tx_buf_ptr_lnc[i] =
1146 (BUF_OFFSET_LNC +
1147 RX_RING_SIZE * RX_BUFF_SIZE +
1148 i * TX_BUFF_SIZE);
1149 }
1150
1151 break;
1152#endif
1153 case PMAX_LANCE:
1154 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1155 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1156 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1157 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1158 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1159 lp->dma_irq = -1;
1160
1161 /*
1162 * setup the pointer arrays, this sucks [tm] :-(
1163 */
1164 for (i = 0; i < RX_RING_SIZE; i++) {
1165 lp->rx_buf_ptr_cpu[i] =
1166 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1167 2 * i * RX_BUFF_SIZE);
1168 lp->rx_buf_ptr_lnc[i] =
1169 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1170 }
1171 for (i = 0; i < TX_RING_SIZE; i++) {
1172 lp->tx_buf_ptr_cpu[i] =
1173 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1174 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1175 2 * i * TX_BUFF_SIZE);
1176 lp->tx_buf_ptr_lnc[i] =
1177 (BUF_OFFSET_LNC +
1178 RX_RING_SIZE * RX_BUFF_SIZE +
1179 i * TX_BUFF_SIZE);
1180 }
1181
1182 break;
1183
1184 default:
1185 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1186 name);
1187 ret = -ENODEV;
1188 goto err_out_dev;
1189 }
1190
1191 ll = (struct lance_regs *) dev->base_addr;
1192 esar = (unsigned char *) esar_base;
1193
1194 /* prom checks */
1195 /* First, check for test pattern */
1196 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1197 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1198 printk(KERN_ERR
1199 "%s: Ethernet station address prom not found!\n",
1200 name);
1201 ret = -ENODEV;
1202 goto err_out_resource;
1203 }
1204 /* Check the prom contents */
1205 for (i = 0; i < 8; i++) {
1206 if (esar[i * 4] != esar[0x3c - i * 4] &&
1207 esar[i * 4] != esar[0x40 + i * 4] &&
1208 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1209 printk(KERN_ERR "%s: Something is wrong with the "
1210 "ethernet station address prom!\n", name);
1211 ret = -ENODEV;
1212 goto err_out_resource;
1213 }
1214 }
1215
1216 /* Copy the ethernet address to the device structure, later to the
1217 * lance initialization block so the lance gets it every time it's
1218 * (re)initialized.
1219 */
1220 switch (type) {
1221 case ASIC_LANCE:
1222 desc = "IOASIC onboard LANCE";
1223 break;
1224 case PMAD_LANCE:
1225 desc = "PMAD-AA";
1226 break;
1227 case PMAX_LANCE:
1228 desc = "PMAX onboard LANCE";
1229 break;
1230 }
1231 for (i = 0; i < 6; i++)
1232 addr[i] = esar[i * 4];
1233 eth_hw_addr_set(dev, addr);
1234
1235 printk("%s: %s, addr = %pM, irq = %d\n",
1236 name, desc, dev->dev_addr, dev->irq);
1237
1238 dev->netdev_ops = &lance_netdev_ops;
1239 dev->watchdog_timeo = 5*HZ;
1240
1241 /* lp->ll is the location of the registers for lance card */
1242 lp->ll = ll;
1243
1244 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1245 * specification.
1246 */
1247 lp->busmaster_regval = 0;
1248
1249 dev->dma = 0;
1250
1251 /* We cannot sleep if the chip is busy during a
1252 * multicast list update event, because such events
1253 * can occur from interrupts (ex. IPv6). So we
1254 * use a timer to try again later when necessary. -DaveM
1255 */
1256 lp->dev = dev;
1257 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1258
1259
1260 ret = register_netdev(dev);
1261 if (ret) {
1262 printk(KERN_ERR
1263 "%s: Unable to register netdev, aborting.\n", name);
1264 goto err_out_resource;
1265 }
1266
1267 if (!bdev) {
1268 lp->next = root_lance_dev;
1269 root_lance_dev = dev;
1270 }
1271
1272 printk("%s: registered as %s.\n", name, dev->name);
1273 return 0;
1274
1275err_out_resource:
1276 if (bdev)
1277 release_mem_region(start, len);
1278
1279err_out_dev:
1280 free_netdev(dev);
1281
1282err_out:
1283 return ret;
1284}
1285
1286/* Find all the lance cards on the system and initialize them */
1287static int __init dec_lance_platform_probe(void)
1288{
1289 int count = 0;
1290
1291 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1292 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1293 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1294 count++;
1295 } else if (!TURBOCHANNEL) {
1296 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1297 count++;
1298 }
1299 }
1300
1301 return (count > 0) ? 0 : -ENODEV;
1302}
1303
1304static void __exit dec_lance_platform_remove(void)
1305{
1306 while (root_lance_dev) {
1307 struct net_device *dev = root_lance_dev;
1308 struct lance_private *lp = netdev_priv(dev);
1309
1310 unregister_netdev(dev);
1311 root_lance_dev = lp->next;
1312 free_netdev(dev);
1313 }
1314}
1315
1316#ifdef CONFIG_TC
1317static int dec_lance_tc_probe(struct device *dev);
1318static int dec_lance_tc_remove(struct device *dev);
1319
1320static const struct tc_device_id dec_lance_tc_table[] = {
1321 { "DEC ", "PMAD-AA " },
1322 { }
1323};
1324MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1325
1326static struct tc_driver dec_lance_tc_driver = {
1327 .id_table = dec_lance_tc_table,
1328 .driver = {
1329 .name = "declance",
1330 .bus = &tc_bus_type,
1331 .probe = dec_lance_tc_probe,
1332 .remove = dec_lance_tc_remove,
1333 },
1334};
1335
1336static int dec_lance_tc_probe(struct device *dev)
1337{
1338 int status = dec_lance_probe(dev, PMAD_LANCE);
1339 if (!status)
1340 get_device(dev);
1341 return status;
1342}
1343
1344static void dec_lance_remove(struct device *bdev)
1345{
1346 struct net_device *dev = dev_get_drvdata(bdev);
1347 resource_size_t start, len;
1348
1349 unregister_netdev(dev);
1350 start = to_tc_dev(bdev)->resource.start;
1351 len = to_tc_dev(bdev)->resource.end - start + 1;
1352 release_mem_region(start, len);
1353 free_netdev(dev);
1354}
1355
1356static int dec_lance_tc_remove(struct device *dev)
1357{
1358 put_device(dev);
1359 dec_lance_remove(dev);
1360 return 0;
1361}
1362#endif
1363
1364static int __init dec_lance_init(void)
1365{
1366 int status;
1367
1368 status = tc_register_driver(&dec_lance_tc_driver);
1369 if (!status)
1370 dec_lance_platform_probe();
1371 return status;
1372}
1373
1374static void __exit dec_lance_exit(void)
1375{
1376 dec_lance_platform_remove();
1377 tc_unregister_driver(&dec_lance_tc_driver);
1378}
1379
1380
1381module_init(dec_lance_init);
1382module_exit(dec_lance_exit);
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
75static const char version[] =
76"declance.c: v0.011 by Linux MIPS DECstation task force\n";
77
78MODULE_AUTHOR("Linux MIPS DECstation task force");
79MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
80MODULE_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
186struct 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
195struct 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. */
206struct 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
249struct 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 */
284struct lance_regs {
285 volatile unsigned short rdp; /* register data port */
286 unsigned short pad;
287 volatile unsigned short rap; /* register address port */
288};
289
290int dec_lance_debug = 2;
291
292static struct tc_driver dec_lance_tc_driver;
293static struct net_device *root_lance_dev;
294
295static inline void writereg(volatile unsigned short *regptr, short value)
296{
297 *regptr = value;
298 iob();
299}
300
301/* Load the CSR registers */
302static 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 */
327static 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
386static 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 */
449static 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
526static 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
555static 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
642static 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;
717out:
718 if (netif_queue_stopped(dev) &&
719 TX_BUFFS_AVAIL > 0)
720 netif_wake_queue(dev);
721
722 spin_unlock(&lp->lock);
723}
724
725static 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
733static 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
779static 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
838static 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
869static 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
886static 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
897static int 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
942static 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
971static 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
1004static 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
1012static 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
1022static 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
1035 if (dec_lance_debug && version_printed++ == 0)
1036 printk(version);
1037
1038 if (bdev)
1039 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1040 else {
1041 i = 0;
1042 dev = root_lance_dev;
1043 while (dev) {
1044 i++;
1045 lp = netdev_priv(dev);
1046 dev = lp->next;
1047 }
1048 snprintf(name, sizeof(name), fmt, i);
1049 }
1050
1051 dev = alloc_etherdev(sizeof(struct lance_private));
1052 if (!dev) {
1053 ret = -ENOMEM;
1054 goto err_out;
1055 }
1056
1057 /*
1058 * alloc_etherdev ensures the data structures used by the LANCE
1059 * are aligned.
1060 */
1061 lp = netdev_priv(dev);
1062 spin_lock_init(&lp->lock);
1063
1064 lp->type = type;
1065 switch (type) {
1066 case ASIC_LANCE:
1067 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1068
1069 /* buffer space for the on-board LANCE shared memory */
1070 /*
1071 * FIXME: ugly hack!
1072 */
1073 dev->mem_start = CKSEG1ADDR(0x00020000);
1074 dev->mem_end = dev->mem_start + 0x00020000;
1075 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1076 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1077
1078 /* Workaround crash with booting KN04 2.1k from Disk */
1079 memset((void *)dev->mem_start, 0,
1080 dev->mem_end - dev->mem_start);
1081
1082 /*
1083 * setup the pointer arrays, this sucks [tm] :-(
1084 */
1085 for (i = 0; i < RX_RING_SIZE; i++) {
1086 lp->rx_buf_ptr_cpu[i] =
1087 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1088 2 * i * RX_BUFF_SIZE);
1089 lp->rx_buf_ptr_lnc[i] =
1090 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1091 }
1092 for (i = 0; i < TX_RING_SIZE; i++) {
1093 lp->tx_buf_ptr_cpu[i] =
1094 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1095 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1096 2 * i * TX_BUFF_SIZE);
1097 lp->tx_buf_ptr_lnc[i] =
1098 (BUF_OFFSET_LNC +
1099 RX_RING_SIZE * RX_BUFF_SIZE +
1100 i * TX_BUFF_SIZE);
1101 }
1102
1103 /* Setup I/O ASIC LANCE DMA. */
1104 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1105 ioasic_write(IO_REG_LANCE_DMA_P,
1106 CPHYSADDR(dev->mem_start) << 3);
1107
1108 break;
1109#ifdef CONFIG_TC
1110 case PMAD_LANCE:
1111 dev_set_drvdata(bdev, dev);
1112
1113 start = to_tc_dev(bdev)->resource.start;
1114 len = to_tc_dev(bdev)->resource.end - start + 1;
1115 if (!request_mem_region(start, len, dev_name(bdev))) {
1116 printk(KERN_ERR
1117 "%s: Unable to reserve MMIO resource\n",
1118 dev_name(bdev));
1119 ret = -EBUSY;
1120 goto err_out_dev;
1121 }
1122
1123 dev->mem_start = CKSEG1ADDR(start);
1124 dev->mem_end = dev->mem_start + 0x100000;
1125 dev->base_addr = dev->mem_start + 0x100000;
1126 dev->irq = to_tc_dev(bdev)->interrupt;
1127 esar_base = dev->mem_start + 0x1c0002;
1128 lp->dma_irq = -1;
1129
1130 for (i = 0; i < RX_RING_SIZE; i++) {
1131 lp->rx_buf_ptr_cpu[i] =
1132 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1133 i * RX_BUFF_SIZE);
1134 lp->rx_buf_ptr_lnc[i] =
1135 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1136 }
1137 for (i = 0; i < TX_RING_SIZE; i++) {
1138 lp->tx_buf_ptr_cpu[i] =
1139 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1140 RX_RING_SIZE * RX_BUFF_SIZE +
1141 i * TX_BUFF_SIZE);
1142 lp->tx_buf_ptr_lnc[i] =
1143 (BUF_OFFSET_LNC +
1144 RX_RING_SIZE * RX_BUFF_SIZE +
1145 i * TX_BUFF_SIZE);
1146 }
1147
1148 break;
1149#endif
1150 case PMAX_LANCE:
1151 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1152 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1153 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1154 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1155 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1156 lp->dma_irq = -1;
1157
1158 /*
1159 * setup the pointer arrays, this sucks [tm] :-(
1160 */
1161 for (i = 0; i < RX_RING_SIZE; i++) {
1162 lp->rx_buf_ptr_cpu[i] =
1163 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1164 2 * i * RX_BUFF_SIZE);
1165 lp->rx_buf_ptr_lnc[i] =
1166 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1167 }
1168 for (i = 0; i < TX_RING_SIZE; i++) {
1169 lp->tx_buf_ptr_cpu[i] =
1170 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1171 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1172 2 * i * TX_BUFF_SIZE);
1173 lp->tx_buf_ptr_lnc[i] =
1174 (BUF_OFFSET_LNC +
1175 RX_RING_SIZE * RX_BUFF_SIZE +
1176 i * TX_BUFF_SIZE);
1177 }
1178
1179 break;
1180
1181 default:
1182 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1183 name);
1184 ret = -ENODEV;
1185 goto err_out_dev;
1186 }
1187
1188 ll = (struct lance_regs *) dev->base_addr;
1189 esar = (unsigned char *) esar_base;
1190
1191 /* prom checks */
1192 /* First, check for test pattern */
1193 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1194 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1195 printk(KERN_ERR
1196 "%s: Ethernet station address prom not found!\n",
1197 name);
1198 ret = -ENODEV;
1199 goto err_out_resource;
1200 }
1201 /* Check the prom contents */
1202 for (i = 0; i < 8; i++) {
1203 if (esar[i * 4] != esar[0x3c - i * 4] &&
1204 esar[i * 4] != esar[0x40 + i * 4] &&
1205 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1206 printk(KERN_ERR "%s: Something is wrong with the "
1207 "ethernet station address prom!\n", name);
1208 ret = -ENODEV;
1209 goto err_out_resource;
1210 }
1211 }
1212
1213 /* Copy the ethernet address to the device structure, later to the
1214 * lance initialization block so the lance gets it every time it's
1215 * (re)initialized.
1216 */
1217 switch (type) {
1218 case ASIC_LANCE:
1219 printk("%s: IOASIC onboard LANCE", name);
1220 break;
1221 case PMAD_LANCE:
1222 printk("%s: PMAD-AA", name);
1223 break;
1224 case PMAX_LANCE:
1225 printk("%s: PMAX onboard LANCE", name);
1226 break;
1227 }
1228 for (i = 0; i < 6; i++)
1229 dev->dev_addr[i] = esar[i * 4];
1230
1231 printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
1232
1233 dev->netdev_ops = &lance_netdev_ops;
1234 dev->watchdog_timeo = 5*HZ;
1235
1236 /* lp->ll is the location of the registers for lance card */
1237 lp->ll = ll;
1238
1239 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1240 * specification.
1241 */
1242 lp->busmaster_regval = 0;
1243
1244 dev->dma = 0;
1245
1246 /* We cannot sleep if the chip is busy during a
1247 * multicast list update event, because such events
1248 * can occur from interrupts (ex. IPv6). So we
1249 * use a timer to try again later when necessary. -DaveM
1250 */
1251 lp->dev = dev;
1252 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1253
1254
1255 ret = register_netdev(dev);
1256 if (ret) {
1257 printk(KERN_ERR
1258 "%s: Unable to register netdev, aborting.\n", name);
1259 goto err_out_resource;
1260 }
1261
1262 if (!bdev) {
1263 lp->next = root_lance_dev;
1264 root_lance_dev = dev;
1265 }
1266
1267 printk("%s: registered as %s.\n", name, dev->name);
1268 return 0;
1269
1270err_out_resource:
1271 if (bdev)
1272 release_mem_region(start, len);
1273
1274err_out_dev:
1275 free_netdev(dev);
1276
1277err_out:
1278 return ret;
1279}
1280
1281/* Find all the lance cards on the system and initialize them */
1282static int __init dec_lance_platform_probe(void)
1283{
1284 int count = 0;
1285
1286 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1287 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1288 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1289 count++;
1290 } else if (!TURBOCHANNEL) {
1291 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1292 count++;
1293 }
1294 }
1295
1296 return (count > 0) ? 0 : -ENODEV;
1297}
1298
1299static void __exit dec_lance_platform_remove(void)
1300{
1301 while (root_lance_dev) {
1302 struct net_device *dev = root_lance_dev;
1303 struct lance_private *lp = netdev_priv(dev);
1304
1305 unregister_netdev(dev);
1306 root_lance_dev = lp->next;
1307 free_netdev(dev);
1308 }
1309}
1310
1311#ifdef CONFIG_TC
1312static int dec_lance_tc_probe(struct device *dev);
1313static int dec_lance_tc_remove(struct device *dev);
1314
1315static const struct tc_device_id dec_lance_tc_table[] = {
1316 { "DEC ", "PMAD-AA " },
1317 { }
1318};
1319MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1320
1321static struct tc_driver dec_lance_tc_driver = {
1322 .id_table = dec_lance_tc_table,
1323 .driver = {
1324 .name = "declance",
1325 .bus = &tc_bus_type,
1326 .probe = dec_lance_tc_probe,
1327 .remove = dec_lance_tc_remove,
1328 },
1329};
1330
1331static int dec_lance_tc_probe(struct device *dev)
1332{
1333 int status = dec_lance_probe(dev, PMAD_LANCE);
1334 if (!status)
1335 get_device(dev);
1336 return status;
1337}
1338
1339static void dec_lance_remove(struct device *bdev)
1340{
1341 struct net_device *dev = dev_get_drvdata(bdev);
1342 resource_size_t start, len;
1343
1344 unregister_netdev(dev);
1345 start = to_tc_dev(bdev)->resource.start;
1346 len = to_tc_dev(bdev)->resource.end - start + 1;
1347 release_mem_region(start, len);
1348 free_netdev(dev);
1349}
1350
1351static int dec_lance_tc_remove(struct device *dev)
1352{
1353 put_device(dev);
1354 dec_lance_remove(dev);
1355 return 0;
1356}
1357#endif
1358
1359static int __init dec_lance_init(void)
1360{
1361 int status;
1362
1363 status = tc_register_driver(&dec_lance_tc_driver);
1364 if (!status)
1365 dec_lance_platform_probe();
1366 return status;
1367}
1368
1369static void __exit dec_lance_exit(void)
1370{
1371 dec_lance_platform_remove();
1372 tc_unregister_driver(&dec_lance_tc_driver);
1373}
1374
1375
1376module_init(dec_lance_init);
1377module_exit(dec_lance_exit);