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
76 static const char version[] =
77 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
78
79 MODULE_AUTHOR("Linux MIPS DECstation task force");
80 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
81 MODULE_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
187 struct 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
196 struct 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. */
207 struct 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
250 struct 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 */
285 struct lance_regs {
286 volatile unsigned short rdp; /* register data port */
287 unsigned short pad;
288 volatile unsigned short rap; /* register address port */
289 };
290
291 int dec_lance_debug = 2;
292
293 static struct tc_driver dec_lance_tc_driver;
294 static struct net_device *root_lance_dev;
295
writereg(volatile unsigned short * regptr,short value)296 static inline void writereg(volatile unsigned short *regptr, short value)
297 {
298 *regptr = value;
299 iob();
300 }
301
302 /* Load the CSR registers */
load_csrs(struct lance_private * lp)303 static 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 */
cp_to_buf(const int type,void * to,const void * from,int len)328 static 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
cp_from_buf(const int type,void * to,const void * from,int len)387 static 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 */
lance_init_ring(struct net_device * dev)450 static 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
init_restart_lance(struct lance_private * lp)527 static 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
lance_rx(struct net_device * dev)556 static 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
lance_tx(struct net_device * dev)643 static 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;
718 out:
719 if (netif_queue_stopped(dev) &&
720 TX_BUFFS_AVAIL > 0)
721 netif_wake_queue(dev);
722
723 spin_unlock(&lp->lock);
724 }
725
lance_dma_merr_int(int irq,void * dev_id)726 static 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
lance_interrupt(int irq,void * dev_id)734 static 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
lance_open(struct net_device * dev)780 static 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
lance_close(struct net_device * dev)839 static 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
lance_reset(struct net_device * dev)870 static 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
lance_tx_timeout(struct net_device * dev,unsigned int txqueue)887 static 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
lance_start_xmit(struct sk_buff * skb,struct net_device * dev)898 static 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
lance_load_multicast(struct net_device * dev)943 static 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
lance_set_multicast(struct net_device * dev)972 static 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
lance_set_multicast_retry(struct timer_list * t)1005 static 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
1013 static 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
dec_lance_probe(struct device * bdev,const int type)1023 static 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 const char *desc;
1036
1037 if (dec_lance_debug && version_printed++ == 0)
1038 printk(version);
1039
1040 if (bdev)
1041 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1042 else {
1043 i = 0;
1044 dev = root_lance_dev;
1045 while (dev) {
1046 i++;
1047 lp = netdev_priv(dev);
1048 dev = lp->next;
1049 }
1050 snprintf(name, sizeof(name), fmt, i);
1051 }
1052
1053 dev = alloc_etherdev(sizeof(struct lance_private));
1054 if (!dev) {
1055 ret = -ENOMEM;
1056 goto err_out;
1057 }
1058
1059 /*
1060 * alloc_etherdev ensures the data structures used by the LANCE
1061 * are aligned.
1062 */
1063 lp = netdev_priv(dev);
1064 spin_lock_init(&lp->lock);
1065
1066 lp->type = type;
1067 switch (type) {
1068 case ASIC_LANCE:
1069 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1070
1071 /* buffer space for the on-board LANCE shared memory */
1072 /*
1073 * FIXME: ugly hack!
1074 */
1075 dev->mem_start = CKSEG1ADDR(0x00020000);
1076 dev->mem_end = dev->mem_start + 0x00020000;
1077 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1078 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1079
1080 /* Workaround crash with booting KN04 2.1k from Disk */
1081 memset((void *)dev->mem_start, 0,
1082 dev->mem_end - dev->mem_start);
1083
1084 /*
1085 * setup the pointer arrays, this sucks [tm] :-(
1086 */
1087 for (i = 0; i < RX_RING_SIZE; i++) {
1088 lp->rx_buf_ptr_cpu[i] =
1089 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1090 2 * i * RX_BUFF_SIZE);
1091 lp->rx_buf_ptr_lnc[i] =
1092 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1093 }
1094 for (i = 0; i < TX_RING_SIZE; i++) {
1095 lp->tx_buf_ptr_cpu[i] =
1096 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1097 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1098 2 * i * TX_BUFF_SIZE);
1099 lp->tx_buf_ptr_lnc[i] =
1100 (BUF_OFFSET_LNC +
1101 RX_RING_SIZE * RX_BUFF_SIZE +
1102 i * TX_BUFF_SIZE);
1103 }
1104
1105 /* Setup I/O ASIC LANCE DMA. */
1106 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1107 ioasic_write(IO_REG_LANCE_DMA_P,
1108 CPHYSADDR(dev->mem_start) << 3);
1109
1110 break;
1111 #ifdef CONFIG_TC
1112 case PMAD_LANCE:
1113 dev_set_drvdata(bdev, dev);
1114
1115 start = to_tc_dev(bdev)->resource.start;
1116 len = to_tc_dev(bdev)->resource.end - start + 1;
1117 if (!request_mem_region(start, len, dev_name(bdev))) {
1118 printk(KERN_ERR
1119 "%s: Unable to reserve MMIO resource\n",
1120 dev_name(bdev));
1121 ret = -EBUSY;
1122 goto err_out_dev;
1123 }
1124
1125 dev->mem_start = CKSEG1ADDR(start);
1126 dev->mem_end = dev->mem_start + 0x100000;
1127 dev->base_addr = dev->mem_start + 0x100000;
1128 dev->irq = to_tc_dev(bdev)->interrupt;
1129 esar_base = dev->mem_start + 0x1c0002;
1130 lp->dma_irq = -1;
1131
1132 for (i = 0; i < RX_RING_SIZE; i++) {
1133 lp->rx_buf_ptr_cpu[i] =
1134 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1135 i * RX_BUFF_SIZE);
1136 lp->rx_buf_ptr_lnc[i] =
1137 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1138 }
1139 for (i = 0; i < TX_RING_SIZE; i++) {
1140 lp->tx_buf_ptr_cpu[i] =
1141 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1142 RX_RING_SIZE * RX_BUFF_SIZE +
1143 i * TX_BUFF_SIZE);
1144 lp->tx_buf_ptr_lnc[i] =
1145 (BUF_OFFSET_LNC +
1146 RX_RING_SIZE * RX_BUFF_SIZE +
1147 i * TX_BUFF_SIZE);
1148 }
1149
1150 break;
1151 #endif
1152 case PMAX_LANCE:
1153 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1154 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1155 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1156 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1157 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1158 lp->dma_irq = -1;
1159
1160 /*
1161 * setup the pointer arrays, this sucks [tm] :-(
1162 */
1163 for (i = 0; i < RX_RING_SIZE; i++) {
1164 lp->rx_buf_ptr_cpu[i] =
1165 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1166 2 * i * RX_BUFF_SIZE);
1167 lp->rx_buf_ptr_lnc[i] =
1168 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1169 }
1170 for (i = 0; i < TX_RING_SIZE; i++) {
1171 lp->tx_buf_ptr_cpu[i] =
1172 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1173 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1174 2 * i * TX_BUFF_SIZE);
1175 lp->tx_buf_ptr_lnc[i] =
1176 (BUF_OFFSET_LNC +
1177 RX_RING_SIZE * RX_BUFF_SIZE +
1178 i * TX_BUFF_SIZE);
1179 }
1180
1181 break;
1182
1183 default:
1184 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1185 name);
1186 ret = -ENODEV;
1187 goto err_out_dev;
1188 }
1189
1190 ll = (struct lance_regs *) dev->base_addr;
1191 esar = (unsigned char *) esar_base;
1192
1193 /* prom checks */
1194 /* First, check for test pattern */
1195 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1196 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1197 printk(KERN_ERR
1198 "%s: Ethernet station address prom not found!\n",
1199 name);
1200 ret = -ENODEV;
1201 goto err_out_resource;
1202 }
1203 /* Check the prom contents */
1204 for (i = 0; i < 8; i++) {
1205 if (esar[i * 4] != esar[0x3c - i * 4] &&
1206 esar[i * 4] != esar[0x40 + i * 4] &&
1207 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1208 printk(KERN_ERR "%s: Something is wrong with the "
1209 "ethernet station address prom!\n", name);
1210 ret = -ENODEV;
1211 goto err_out_resource;
1212 }
1213 }
1214
1215 /* Copy the ethernet address to the device structure, later to the
1216 * lance initialization block so the lance gets it every time it's
1217 * (re)initialized.
1218 */
1219 switch (type) {
1220 case ASIC_LANCE:
1221 desc = "IOASIC onboard LANCE";
1222 break;
1223 case PMAD_LANCE:
1224 desc = "PMAD-AA";
1225 break;
1226 case PMAX_LANCE:
1227 desc = "PMAX onboard LANCE";
1228 break;
1229 }
1230 for (i = 0; i < 6; i++)
1231 dev->dev_addr[i] = esar[i * 4];
1232
1233 printk("%s: %s, addr = %pM, irq = %d\n",
1234 name, desc, dev->dev_addr, dev->irq);
1235
1236 dev->netdev_ops = &lance_netdev_ops;
1237 dev->watchdog_timeo = 5*HZ;
1238
1239 /* lp->ll is the location of the registers for lance card */
1240 lp->ll = ll;
1241
1242 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1243 * specification.
1244 */
1245 lp->busmaster_regval = 0;
1246
1247 dev->dma = 0;
1248
1249 /* We cannot sleep if the chip is busy during a
1250 * multicast list update event, because such events
1251 * can occur from interrupts (ex. IPv6). So we
1252 * use a timer to try again later when necessary. -DaveM
1253 */
1254 lp->dev = dev;
1255 timer_setup(&lp->multicast_timer, lance_set_multicast_retry, 0);
1256
1257
1258 ret = register_netdev(dev);
1259 if (ret) {
1260 printk(KERN_ERR
1261 "%s: Unable to register netdev, aborting.\n", name);
1262 goto err_out_resource;
1263 }
1264
1265 if (!bdev) {
1266 lp->next = root_lance_dev;
1267 root_lance_dev = dev;
1268 }
1269
1270 printk("%s: registered as %s.\n", name, dev->name);
1271 return 0;
1272
1273 err_out_resource:
1274 if (bdev)
1275 release_mem_region(start, len);
1276
1277 err_out_dev:
1278 free_netdev(dev);
1279
1280 err_out:
1281 return ret;
1282 }
1283
1284 /* Find all the lance cards on the system and initialize them */
dec_lance_platform_probe(void)1285 static int __init dec_lance_platform_probe(void)
1286 {
1287 int count = 0;
1288
1289 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1290 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1291 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1292 count++;
1293 } else if (!TURBOCHANNEL) {
1294 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1295 count++;
1296 }
1297 }
1298
1299 return (count > 0) ? 0 : -ENODEV;
1300 }
1301
dec_lance_platform_remove(void)1302 static void __exit dec_lance_platform_remove(void)
1303 {
1304 while (root_lance_dev) {
1305 struct net_device *dev = root_lance_dev;
1306 struct lance_private *lp = netdev_priv(dev);
1307
1308 unregister_netdev(dev);
1309 root_lance_dev = lp->next;
1310 free_netdev(dev);
1311 }
1312 }
1313
1314 #ifdef CONFIG_TC
1315 static int dec_lance_tc_probe(struct device *dev);
1316 static int dec_lance_tc_remove(struct device *dev);
1317
1318 static const struct tc_device_id dec_lance_tc_table[] = {
1319 { "DEC ", "PMAD-AA " },
1320 { }
1321 };
1322 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1323
1324 static struct tc_driver dec_lance_tc_driver = {
1325 .id_table = dec_lance_tc_table,
1326 .driver = {
1327 .name = "declance",
1328 .bus = &tc_bus_type,
1329 .probe = dec_lance_tc_probe,
1330 .remove = dec_lance_tc_remove,
1331 },
1332 };
1333
dec_lance_tc_probe(struct device * dev)1334 static int dec_lance_tc_probe(struct device *dev)
1335 {
1336 int status = dec_lance_probe(dev, PMAD_LANCE);
1337 if (!status)
1338 get_device(dev);
1339 return status;
1340 }
1341
dec_lance_remove(struct device * bdev)1342 static void dec_lance_remove(struct device *bdev)
1343 {
1344 struct net_device *dev = dev_get_drvdata(bdev);
1345 resource_size_t start, len;
1346
1347 unregister_netdev(dev);
1348 start = to_tc_dev(bdev)->resource.start;
1349 len = to_tc_dev(bdev)->resource.end - start + 1;
1350 release_mem_region(start, len);
1351 free_netdev(dev);
1352 }
1353
dec_lance_tc_remove(struct device * dev)1354 static int dec_lance_tc_remove(struct device *dev)
1355 {
1356 put_device(dev);
1357 dec_lance_remove(dev);
1358 return 0;
1359 }
1360 #endif
1361
dec_lance_init(void)1362 static int __init dec_lance_init(void)
1363 {
1364 int status;
1365
1366 status = tc_register_driver(&dec_lance_tc_driver);
1367 if (!status)
1368 dec_lance_platform_probe();
1369 return status;
1370 }
1371
dec_lance_exit(void)1372 static void __exit dec_lance_exit(void)
1373 {
1374 dec_lance_platform_remove();
1375 tc_unregister_driver(&dec_lance_tc_driver);
1376 }
1377
1378
1379 module_init(dec_lance_init);
1380 module_exit(dec_lance_exit);
1381