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gerrit-public.fairphone.software / fp2-dev / kernel / msm / 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 / . / drivers / net / 7990.c
blob: 18b027e73f28cc0bd3b28253baa80fdd5bb20b9e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame^]1/*
2 * 7990.c -- LANCE ethernet IC generic routines.
3 * This is an attempt to separate out the bits of various ethernet
4 * drivers that are common because they all use the AMD 7990 LANCE
5 * (Local Area Network Controller for Ethernet) chip.
6 *
7 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
8 *
9 * Most of this stuff was obtained by looking at other LANCE drivers,
10 * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful.
11 * NB: this was made easy by the fact that Jes Sorensen had cleaned up
12 * most of a2025 and sunlance with the aim of merging them, so the
13 * common code was pretty obvious.
14 */
15#include <linux/crc32.h>
16#include <linux/delay.h>
17#include <linux/errno.h>
18#include <linux/netdevice.h>
19#include <linux/etherdevice.h>
20#include <linux/init.h>
21#include <linux/module.h>
22#include <linux/kernel.h>
23#include <linux/types.h>
24#include <linux/fcntl.h>
25#include <linux/interrupt.h>
26#include <linux/ioport.h>
27#include <linux/in.h>
28#include <linux/route.h>
29#include <linux/slab.h>
30#include <linux/string.h>
31#include <linux/skbuff.h>
32#include <linux/irq.h>
33/* Used for the temporal inet entries and routing */
34#include <linux/socket.h>
35#include <linux/bitops.h>
36
37#include <asm/system.h>
38#include <asm/io.h>
39#include <asm/dma.h>
40#include <asm/pgtable.h>
41#ifdef CONFIG_HP300
42#include <asm/blinken.h>
43#endif
44
45#include "7990.h"
46
47#define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x))
48#define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x))
49#define READRDP(lp) in_be16(lp->base + LANCE_RDP)
50
51#if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE)
52#include "hplance.h"
53
54#undef WRITERAP
55#undef WRITERDP
56#undef READRDP
57
58#if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE)
59
60/* Lossage Factor Nine, Mr Sulu. */
61#define WRITERAP(lp,x) (lp->writerap(lp,x))
62#define WRITERDP(lp,x) (lp->writerdp(lp,x))
63#define READRDP(lp) (lp->readrdp(lp))
64
65#else
66
67/* These inlines can be used if only CONFIG_HPLANCE is defined */
68static inline void WRITERAP(struct lance_private *lp, __u16 value)
69{
70 do {
71 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
72 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
73}
74
75static inline void WRITERDP(struct lance_private *lp, __u16 value)
76{
77 do {
78 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
79 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
80}
81
82static inline __u16 READRDP(struct lance_private *lp)
83{
84 __u16 value;
85 do {
86 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
87 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
88 return value;
89}
90
91#endif
92#endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */
93
94/* debugging output macros, various flavours */
95/* #define TEST_HITS */
96#ifdef UNDEF
97#define PRINT_RINGS() \
98do { \
99 int t; \
100 for (t=0; t < RX_RING_SIZE; t++) { \
101 printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\
102 t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\
103 ib->brx_ring[t].length,\
104 ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\
105 }\
106 for (t=0; t < TX_RING_SIZE; t++) { \
107 printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\
108 t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\
109 ib->btx_ring[t].length,\
110 ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\
111 }\
112} while (0)
113#else
114#define PRINT_RINGS()
115#endif
116
117/* Load the CSR registers. The LANCE has to be STOPped when we do this! */
118static void load_csrs (struct lance_private *lp)
119{
120 volatile struct lance_init_block *aib = lp->lance_init_block;
121 int leptr;
122
123 leptr = LANCE_ADDR (aib);
124
125 WRITERAP(lp, LE_CSR1); /* load address of init block */
126 WRITERDP(lp, leptr & 0xFFFF);
127 WRITERAP(lp, LE_CSR2);
128 WRITERDP(lp, leptr >> 16);
129 WRITERAP(lp, LE_CSR3);
130 WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */
131
132 /* Point back to csr0 */
133 WRITERAP(lp, LE_CSR0);
134}
135
136/* #define to 0 or 1 appropriately */
137#define DEBUG_IRING 0
138/* Set up the Lance Rx and Tx rings and the init block */
139static void lance_init_ring (struct net_device *dev)
140{
141 struct lance_private *lp = netdev_priv(dev);
142 volatile struct lance_init_block *ib = lp->init_block;
143 volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */
144 int leptr;
145 int i;
146
147 aib = lp->lance_init_block;
148
149 lp->rx_new = lp->tx_new = 0;
150 lp->rx_old = lp->tx_old = 0;
151
152 ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */
153
154 /* Copy the ethernet address to the lance init block
155 * Notice that we do a byteswap if we're big endian.
156 * [I think this is the right criterion; at least, sunlance,
157 * a2065 and atarilance do the byteswap and lance.c (PC) doesn't.
158 * However, the datasheet says that the BSWAP bit doesn't affect
159 * the init block, so surely it should be low byte first for
160 * everybody? Um.]
161 * We could define the ib->physaddr as three 16bit values and
162 * use (addr[1] << 8) | addr[0] & co, but this is more efficient.
163 */
164#ifdef __BIG_ENDIAN
165 ib->phys_addr [0] = dev->dev_addr [1];
166 ib->phys_addr [1] = dev->dev_addr [0];
167 ib->phys_addr [2] = dev->dev_addr [3];
168 ib->phys_addr [3] = dev->dev_addr [2];
169 ib->phys_addr [4] = dev->dev_addr [5];
170 ib->phys_addr [5] = dev->dev_addr [4];
171#else
172 for (i=0; i<6; i++)
173 ib->phys_addr[i] = dev->dev_addr[i];
174#endif
175
176 if (DEBUG_IRING)
177 printk ("TX rings:\n");
178
179 lp->tx_full = 0;
180 /* Setup the Tx ring entries */
181 for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) {
182 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
183 ib->btx_ring [i].tmd0 = leptr;
184 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
185 ib->btx_ring [i].tmd1_bits = 0;
186 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
187 ib->btx_ring [i].misc = 0;
188 if (DEBUG_IRING)
189 printk ("%d: 0x%8.8x\n", i, leptr);
190 }
191
192 /* Setup the Rx ring entries */
193 if (DEBUG_IRING)
194 printk ("RX rings:\n");
195 for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) {
196 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
197
198 ib->brx_ring [i].rmd0 = leptr;
199 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
200 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
201 /* 0xf000 == bits that must be one (reserved, presumably) */
202 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
203 ib->brx_ring [i].mblength = 0;
204 if (DEBUG_IRING)
205 printk ("%d: 0x%8.8x\n", i, leptr);
206 }
207
208 /* Setup the initialization block */
209
210 /* Setup rx descriptor pointer */
211 leptr = LANCE_ADDR(&aib->brx_ring);
212 ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
213 ib->rx_ptr = leptr;
214 if (DEBUG_IRING)
215 printk ("RX ptr: %8.8x\n", leptr);
216
217 /* Setup tx descriptor pointer */
218 leptr = LANCE_ADDR(&aib->btx_ring);
219 ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
220 ib->tx_ptr = leptr;
221 if (DEBUG_IRING)
222 printk ("TX ptr: %8.8x\n", leptr);
223
224 /* Clear the multicast filter */
225 ib->filter [0] = 0;
226 ib->filter [1] = 0;
227 PRINT_RINGS();
228}
229
230/* LANCE must be STOPped before we do this, too... */
231static int init_restart_lance (struct lance_private *lp)
232{
233 int i;
234
235 WRITERAP(lp, LE_CSR0);
236 WRITERDP(lp, LE_C0_INIT);
237
238 /* Need a hook here for sunlance ledma stuff */
239
240 /* Wait for the lance to complete initialization */
241 for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++)
242 barrier();
243 if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) {
244 printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp));
245 return -1;
246 }
247
248 /* Clear IDON by writing a "1", enable interrupts and start lance */
249 WRITERDP(lp, LE_C0_IDON);
250 WRITERDP(lp, LE_C0_INEA | LE_C0_STRT);
251
252 return 0;
253}
254
255static int lance_reset (struct net_device *dev)
256{
257 struct lance_private *lp = netdev_priv(dev);
258 int status;
259
260 /* Stop the lance */
261 WRITERAP(lp, LE_CSR0);
262 WRITERDP(lp, LE_C0_STOP);
263
264 load_csrs (lp);
265 lance_init_ring (dev);
266 dev->trans_start = jiffies;
267 status = init_restart_lance (lp);
268#ifdef DEBUG_DRIVER
269 printk ("Lance restart=%d\n", status);
270#endif
271 return status;
272}
273
274static int lance_rx (struct net_device *dev)
275{
276 struct lance_private *lp = netdev_priv(dev);
277 volatile struct lance_init_block *ib = lp->init_block;
278 volatile struct lance_rx_desc *rd;
279 unsigned char bits;
280 int len = 0; /* XXX shut up gcc warnings */
281 struct sk_buff *skb = 0; /* XXX shut up gcc warnings */
282#ifdef TEST_HITS
283 int i;
284#endif
285
286#ifdef TEST_HITS
287 printk ("[");
288 for (i = 0; i < RX_RING_SIZE; i++) {
289 if (i == lp->rx_new)
290 printk ("%s",
291 ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X");
292 else
293 printk ("%s",
294 ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1");
295 }
296 printk ("]");
297#endif
298#ifdef CONFIG_HP300
299 blinken_leds(0x40, 0);
300#endif
301 WRITERDP(lp, LE_C0_RINT | LE_C0_INEA); /* ack Rx int, reenable ints */
302 for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */
303 !((bits = rd->rmd1_bits) & LE_R1_OWN);
304 rd = &ib->brx_ring [lp->rx_new]) {
305
306 /* We got an incomplete frame? */
307 if ((bits & LE_R1_POK) != LE_R1_POK) {
308 lp->stats.rx_over_errors++;
309 lp->stats.rx_errors++;
310 continue;
311 } else if (bits & LE_R1_ERR) {
312 /* Count only the end frame as a rx error,
313 * not the beginning
314 */
315 if (bits & LE_R1_BUF) lp->stats.rx_fifo_errors++;
316 if (bits & LE_R1_CRC) lp->stats.rx_crc_errors++;
317 if (bits & LE_R1_OFL) lp->stats.rx_over_errors++;
318 if (bits & LE_R1_FRA) lp->stats.rx_frame_errors++;
319 if (bits & LE_R1_EOP) lp->stats.rx_errors++;
320 } else {
321 len = (rd->mblength & 0xfff) - 4;
322 skb = dev_alloc_skb (len+2);
323
324 if (skb == 0) {
325 printk ("%s: Memory squeeze, deferring packet.\n",
326 dev->name);
327 lp->stats.rx_dropped++;
328 rd->mblength = 0;
329 rd->rmd1_bits = LE_R1_OWN;
330 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
331 return 0;
332 }
333
334 skb->dev = dev;
335 skb_reserve (skb, 2); /* 16 byte align */
336 skb_put (skb, len); /* make room */
337 eth_copy_and_sum(skb,
338 (unsigned char *)&(ib->rx_buf [lp->rx_new][0]),
339 len, 0);
340 skb->protocol = eth_type_trans (skb, dev);
341 netif_rx (skb);
342 dev->last_rx = jiffies;
343 lp->stats.rx_packets++;
344 lp->stats.rx_bytes += len;
345 }
346
347 /* Return the packet to the pool */
348 rd->mblength = 0;
349 rd->rmd1_bits = LE_R1_OWN;
350 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
351 }
352 return 0;
353}
354
355static int lance_tx (struct net_device *dev)
356{
357 struct lance_private *lp = netdev_priv(dev);
358 volatile struct lance_init_block *ib = lp->init_block;
359 volatile struct lance_tx_desc *td;
360 int i, j;
361 int status;
362
363#ifdef CONFIG_HP300
364 blinken_leds(0x80, 0);
365#endif
366 /* csr0 is 2f3 */
367 WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
368 /* csr0 is 73 */
369
370 j = lp->tx_old;
371 for (i = j; i != lp->tx_new; i = j) {
372 td = &ib->btx_ring [i];
373
374 /* If we hit a packet not owned by us, stop */
375 if (td->tmd1_bits & LE_T1_OWN)
376 break;
377
378 if (td->tmd1_bits & LE_T1_ERR) {
379 status = td->misc;
380
381 lp->stats.tx_errors++;
382 if (status & LE_T3_RTY) lp->stats.tx_aborted_errors++;
383 if (status & LE_T3_LCOL) lp->stats.tx_window_errors++;
384
385 if (status & LE_T3_CLOS) {
386 lp->stats.tx_carrier_errors++;
387 if (lp->auto_select) {
388 lp->tpe = 1 - lp->tpe;
389 printk("%s: Carrier Lost, trying %s\n",
390 dev->name, lp->tpe?"TPE":"AUI");
391 /* Stop the lance */
392 WRITERAP(lp, LE_CSR0);
393 WRITERDP(lp, LE_C0_STOP);
394 lance_init_ring (dev);
395 load_csrs (lp);
396 init_restart_lance (lp);
397 return 0;
398 }
399 }
400
401 /* buffer errors and underflows turn off the transmitter */
402 /* Restart the adapter */
403 if (status & (LE_T3_BUF|LE_T3_UFL)) {
404 lp->stats.tx_fifo_errors++;
405
406 printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
407 dev->name);
408 /* Stop the lance */
409 WRITERAP(lp, LE_CSR0);
410 WRITERDP(lp, LE_C0_STOP);
411 lance_init_ring (dev);
412 load_csrs (lp);
413 init_restart_lance (lp);
414 return 0;
415 }
416 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
417 /*
418 * So we don't count the packet more than once.
419 */
420 td->tmd1_bits &= ~(LE_T1_POK);
421
422 /* One collision before packet was sent. */
423 if (td->tmd1_bits & LE_T1_EONE)
424 lp->stats.collisions++;
425
426 /* More than one collision, be optimistic. */
427 if (td->tmd1_bits & LE_T1_EMORE)
428 lp->stats.collisions += 2;
429
430 lp->stats.tx_packets++;
431 }
432
433 j = (j + 1) & lp->tx_ring_mod_mask;
434 }
435 lp->tx_old = j;
436 WRITERDP(lp, LE_C0_TINT | LE_C0_INEA);
437 return 0;
438}
439
440static irqreturn_t
441lance_interrupt (int irq, void *dev_id, struct pt_regs *regs)
442{
443 struct net_device *dev = (struct net_device *)dev_id;
444 struct lance_private *lp = netdev_priv(dev);
445 int csr0;
446
447 spin_lock (&lp->devlock);
448
449 WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */
450 csr0 = READRDP(lp);
451
452 PRINT_RINGS();
453
454 if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */
455 spin_unlock (&lp->devlock);
456 return IRQ_NONE; /* been generated by the Lance. */
457 }
458
459 /* Acknowledge all the interrupt sources ASAP */
460 WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT));
461
462 if ((csr0 & LE_C0_ERR)) {
463 /* Clear the error condition */
464 WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA);
465 }
466
467 if (csr0 & LE_C0_RINT)
468 lance_rx (dev);
469
470 if (csr0 & LE_C0_TINT)
471 lance_tx (dev);
472
473 /* Log misc errors. */
474 if (csr0 & LE_C0_BABL)
475 lp->stats.tx_errors++; /* Tx babble. */
476 if (csr0 & LE_C0_MISS)
477 lp->stats.rx_errors++; /* Missed a Rx frame. */
478 if (csr0 & LE_C0_MERR) {
479 printk("%s: Bus master arbitration failure, status %4.4x.\n",
480 dev->name, csr0);
481 /* Restart the chip. */
482 WRITERDP(lp, LE_C0_STRT);
483 }
484
485 if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) {
486 lp->tx_full = 0;
487 netif_wake_queue (dev);
488 }
489
490 WRITERAP(lp, LE_CSR0);
491 WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA);
492
493 spin_unlock (&lp->devlock);
494 return IRQ_HANDLED;
495}
496
497int lance_open (struct net_device *dev)
498{
499 struct lance_private *lp = netdev_priv(dev);
500 int res;
501
502 /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */
503 if (request_irq(lp->irq, lance_interrupt, 0, lp->name, dev))
504 return -EAGAIN;
505
506 res = lance_reset(dev);
507 spin_lock_init(&lp->devlock);
508 netif_start_queue (dev);
509
510 return res;
511}
512
513int lance_close (struct net_device *dev)
514{
515 struct lance_private *lp = netdev_priv(dev);
516
517 netif_stop_queue (dev);
518
519 /* Stop the LANCE */
520 WRITERAP(lp, LE_CSR0);
521 WRITERDP(lp, LE_C0_STOP);
522
523 free_irq(lp->irq, dev);
524
525 return 0;
526}
527
528void lance_tx_timeout(struct net_device *dev)
529{
530 printk("lance_tx_timeout\n");
531 lance_reset(dev);
532 dev->trans_start = jiffies;
533 netif_wake_queue (dev);
534}
535
536
537int lance_start_xmit (struct sk_buff *skb, struct net_device *dev)
538{
539 struct lance_private *lp = netdev_priv(dev);
540 volatile struct lance_init_block *ib = lp->init_block;
541 int entry, skblen, len;
542 static int outs;
543 unsigned long flags;
544
545 if (!TX_BUFFS_AVAIL)
546 return -1;
547
548 netif_stop_queue (dev);
549
550 skblen = skb->len;
551
552#ifdef DEBUG_DRIVER
553 /* dump the packet */
554 {
555 int i;
556
557 for (i = 0; i < 64; i++) {
558 if ((i % 16) == 0)
559 printk ("\n");
560 printk ("%2.2x ", skb->data [i]);
561 }
562 }
563#endif
564 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
565 entry = lp->tx_new & lp->tx_ring_mod_mask;
566 ib->btx_ring [entry].length = (-len) | 0xf000;
567 ib->btx_ring [entry].misc = 0;
568
569 if (skb->len < ETH_ZLEN)
570 memset((char *)&ib->tx_buf[entry][0], 0, ETH_ZLEN);
571 memcpy ((char *)&ib->tx_buf [entry][0], skb->data, skblen);
572
573 /* Now, give the packet to the lance */
574 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
575 lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
576
577 outs++;
578 /* Kick the lance: transmit now */
579 WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD);
580 dev->trans_start = jiffies;
581 dev_kfree_skb (skb);
582
583 spin_lock_irqsave (&lp->devlock, flags);
584 if (TX_BUFFS_AVAIL)
585 netif_start_queue (dev);
586 else
587 lp->tx_full = 1;
588 spin_unlock_irqrestore (&lp->devlock, flags);
589
590 return 0;
591}
592
593struct net_device_stats *lance_get_stats (struct net_device *dev)
594{
595 struct lance_private *lp = netdev_priv(dev);
596
597 return &lp->stats;
598}
599
600/* taken from the depca driver via a2065.c */
601static void lance_load_multicast (struct net_device *dev)
602{
603 struct lance_private *lp = netdev_priv(dev);
604 volatile struct lance_init_block *ib = lp->init_block;
605 volatile u16 *mcast_table = (u16 *)&ib->filter;
606 struct dev_mc_list *dmi=dev->mc_list;
607 char *addrs;
608 int i;
609 u32 crc;
610
611 /* set all multicast bits */
612 if (dev->flags & IFF_ALLMULTI){
613 ib->filter [0] = 0xffffffff;
614 ib->filter [1] = 0xffffffff;
615 return;
616 }
617 /* clear the multicast filter */
618 ib->filter [0] = 0;
619 ib->filter [1] = 0;
620
621 /* Add addresses */
622 for (i = 0; i < dev->mc_count; i++){
623 addrs = dmi->dmi_addr;
624 dmi = dmi->next;
625
626 /* multicast address? */
627 if (!(*addrs & 1))
628 continue;
629
630 crc = ether_crc_le(6, addrs);
631 crc = crc >> 26;
632 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
633 }
634 return;
635}
636
637
638void lance_set_multicast (struct net_device *dev)
639{
640 struct lance_private *lp = netdev_priv(dev);
641 volatile struct lance_init_block *ib = lp->init_block;
642 int stopped;
643
644 stopped = netif_queue_stopped(dev);
645 if (!stopped)
646 netif_stop_queue (dev);
647
648 while (lp->tx_old != lp->tx_new)
649 schedule();
650
651 WRITERAP(lp, LE_CSR0);
652 WRITERDP(lp, LE_C0_STOP);
653 lance_init_ring (dev);
654
655 if (dev->flags & IFF_PROMISC) {
656 ib->mode |= LE_MO_PROM;
657 } else {
658 ib->mode &= ~LE_MO_PROM;
659 lance_load_multicast (dev);
660 }
661 load_csrs (lp);
662 init_restart_lance (lp);
663
664 if (!stopped)
665 netif_start_queue (dev);
666}
667
668#ifdef CONFIG_NET_POLL_CONTROLLER
669void lance_poll(struct net_device *dev)
670{
671 struct lance_private *lp = netdev_priv(dev);
672
673 spin_lock (&lp->devlock);
674 WRITERAP(lp, LE_CSR0);
675 WRITERDP(lp, LE_C0_STRT);
676 spin_unlock (&lp->devlock);
677 lance_interrupt(dev->irq, dev, NULL);
678}
679#endif
680
681MODULE_LICENSE("GPL");