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