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1/*
2 * Amiga Linux/68k A2065 Ethernet Driver
3 *
4 * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
5 *
6 * Fixes and tips by:
7 * - Janos Farkas (CHEXUM@sparta.banki.hu)
8 * - Jes Degn Soerensen (jds@kom.auc.dk)
9 * - Matt Domsch (Matt_Domsch@dell.com)
10 *
11 * ----------------------------------------------------------------------------
12 *
13 * This program is based on
14 *
15 * ariadne.?: Amiga Linux/68k Ariadne Ethernet Driver
16 * (C) Copyright 1995 by Geert Uytterhoeven,
17 * Peter De Schrijver
18 *
19 * lance.c: An AMD LANCE ethernet driver for linux.
20 * Written 1993-94 by Donald Becker.
21 *
22 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
23 * Advanced Micro Devices
24 * Publication #16907, Rev. B, Amendment/0, May 1994
25 *
26 * ----------------------------------------------------------------------------
27 *
28 * This file is subject to the terms and conditions of the GNU General Public
29 * License. See the file COPYING in the main directory of the Linux
30 * distribution for more details.
31 *
32 * ----------------------------------------------------------------------------
33 *
34 * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
35 *
36 * - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
37 * both 10BASE-2 (thin coax) and AUI (DB-15) connectors
38 */
39
40#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42/*#define DEBUG*/
43/*#define TEST_HITS*/
44
45#include <linux/errno.h>
46#include <linux/netdevice.h>
47#include <linux/etherdevice.h>
48#include <linux/module.h>
49#include <linux/stddef.h>
50#include <linux/kernel.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/skbuff.h>
54#include <linux/string.h>
55#include <linux/init.h>
56#include <linux/crc32.h>
57#include <linux/zorro.h>
58#include <linux/bitops.h>
59
60#include <asm/byteorder.h>
61#include <asm/irq.h>
62#include <asm/amigaints.h>
63#include <asm/amigahw.h>
64
65#include "a2065.h"
66
67/* Transmit/Receive Ring Definitions */
68
69#define LANCE_LOG_TX_BUFFERS (2)
70#define LANCE_LOG_RX_BUFFERS (4)
71
72#define TX_RING_SIZE (1 << LANCE_LOG_TX_BUFFERS)
73#define RX_RING_SIZE (1 << LANCE_LOG_RX_BUFFERS)
74
75#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
76#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
77
78#define PKT_BUF_SIZE (1544)
79#define RX_BUFF_SIZE PKT_BUF_SIZE
80#define TX_BUFF_SIZE PKT_BUF_SIZE
81
82/* Layout of the Lance's RAM Buffer */
83
84struct lance_init_block {
85 unsigned short mode; /* Pre-set mode (reg. 15) */
86 unsigned char phys_addr[6]; /* Physical ethernet address */
87 unsigned filter[2]; /* Multicast filter. */
88
89 /* Receive and transmit ring base, along with extra bits. */
90 unsigned short rx_ptr; /* receive descriptor addr */
91 unsigned short rx_len; /* receive len and high addr */
92 unsigned short tx_ptr; /* transmit descriptor addr */
93 unsigned short tx_len; /* transmit len and high addr */
94
95 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
96 struct lance_rx_desc brx_ring[RX_RING_SIZE];
97 struct lance_tx_desc btx_ring[TX_RING_SIZE];
98
99 char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
100 char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
101};
102
103/* Private Device Data */
104
105struct lance_private {
106 char *name;
107 volatile struct lance_regs *ll;
108 volatile struct lance_init_block *init_block; /* Hosts view */
109 volatile struct lance_init_block *lance_init_block; /* Lance view */
110
111 int rx_new, tx_new;
112 int rx_old, tx_old;
113
114 int lance_log_rx_bufs, lance_log_tx_bufs;
115 int rx_ring_mod_mask, tx_ring_mod_mask;
116
117 int tpe; /* cable-selection is TPE */
118 int auto_select; /* cable-selection by carrier */
119 unsigned short busmaster_regval;
120
121 struct timer_list multicast_timer;
122 struct net_device *dev;
123};
124
125#define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
126
127/* Load the CSR registers */
128static void load_csrs(struct lance_private *lp)
129{
130 volatile struct lance_regs *ll = lp->ll;
131 volatile struct lance_init_block *aib = lp->lance_init_block;
132 int leptr = LANCE_ADDR(aib);
133
134 ll->rap = LE_CSR1;
135 ll->rdp = (leptr & 0xFFFF);
136 ll->rap = LE_CSR2;
137 ll->rdp = leptr >> 16;
138 ll->rap = LE_CSR3;
139 ll->rdp = lp->busmaster_regval;
140
141 /* Point back to csr0 */
142 ll->rap = LE_CSR0;
143}
144
145/* Setup the Lance Rx and Tx rings */
146static void lance_init_ring(struct net_device *dev)
147{
148 struct lance_private *lp = netdev_priv(dev);
149 volatile struct lance_init_block *ib = lp->init_block;
150 volatile struct lance_init_block *aib = lp->lance_init_block;
151 /* for LANCE_ADDR computations */
152 int leptr;
153 int i;
154
155 /* Lock out other processes while setting up hardware */
156 netif_stop_queue(dev);
157 lp->rx_new = lp->tx_new = 0;
158 lp->rx_old = lp->tx_old = 0;
159
160 ib->mode = 0;
161
162 /* Copy the ethernet address to the lance init block
163 * Note that on the sparc you need to swap the ethernet address.
164 */
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
172 /* Setup the Tx ring entries */
173 netdev_dbg(dev, "TX rings:\n");
174 for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
175 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
176 ib->btx_ring[i].tmd0 = leptr;
177 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
178 ib->btx_ring[i].tmd1_bits = 0;
179 ib->btx_ring[i].length = 0xf000; /* The ones required by tmd2 */
180 ib->btx_ring[i].misc = 0;
181 if (i < 3)
182 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
183 }
184
185 /* Setup the Rx ring entries */
186 netdev_dbg(dev, "RX rings:\n");
187 for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
188 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
189
190 ib->brx_ring[i].rmd0 = leptr;
191 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
192 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
193 ib->brx_ring[i].length = -RX_BUFF_SIZE | 0xf000;
194 ib->brx_ring[i].mblength = 0;
195 if (i < 3)
196 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
197 }
198
199 /* Setup the initialization block */
200
201 /* Setup rx descriptor pointer */
202 leptr = LANCE_ADDR(&aib->brx_ring);
203 ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
204 ib->rx_ptr = leptr;
205 netdev_dbg(dev, "RX ptr: %08x\n", leptr);
206
207 /* Setup tx descriptor pointer */
208 leptr = LANCE_ADDR(&aib->btx_ring);
209 ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
210 ib->tx_ptr = leptr;
211 netdev_dbg(dev, "TX ptr: %08x\n", leptr);
212
213 /* Clear the multicast filter */
214 ib->filter[0] = 0;
215 ib->filter[1] = 0;
216}
217
218static int init_restart_lance(struct lance_private *lp)
219{
220 volatile struct lance_regs *ll = lp->ll;
221 int i;
222
223 ll->rap = LE_CSR0;
224 ll->rdp = LE_C0_INIT;
225
226 /* Wait for the lance to complete initialization */
227 for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
228 barrier();
229 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
230 pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
231 return -EIO;
232 }
233
234 /* Clear IDON by writing a "1", enable interrupts and start lance */
235 ll->rdp = LE_C0_IDON;
236 ll->rdp = LE_C0_INEA | LE_C0_STRT;
237
238 return 0;
239}
240
241static int lance_rx(struct net_device *dev)
242{
243 struct lance_private *lp = netdev_priv(dev);
244 volatile struct lance_init_block *ib = lp->init_block;
245 volatile struct lance_regs *ll = lp->ll;
246 volatile struct lance_rx_desc *rd;
247 unsigned char bits;
248
249#ifdef TEST_HITS
250 int i;
251 char buf[RX_RING_SIZE + 1];
252
253 for (i = 0; i < RX_RING_SIZE; i++) {
254 char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
255 if (i == lp->rx_new)
256 buf[i] = r1_own ? '_' : 'X';
257 else
258 buf[i] = r1_own ? '.' : '1';
259 }
260 buf[RX_RING_SIZE] = 0;
261
262 pr_debug("RxRing TestHits: [%s]\n", buf);
263#endif
264
265 ll->rdp = LE_C0_RINT | LE_C0_INEA;
266 for (rd = &ib->brx_ring[lp->rx_new];
267 !((bits = rd->rmd1_bits) & LE_R1_OWN);
268 rd = &ib->brx_ring[lp->rx_new]) {
269
270 /* We got an incomplete frame? */
271 if ((bits & LE_R1_POK) != LE_R1_POK) {
272 dev->stats.rx_over_errors++;
273 dev->stats.rx_errors++;
274 continue;
275 } else if (bits & LE_R1_ERR) {
276 /* Count only the end frame as a rx error,
277 * not the beginning
278 */
279 if (bits & LE_R1_BUF)
280 dev->stats.rx_fifo_errors++;
281 if (bits & LE_R1_CRC)
282 dev->stats.rx_crc_errors++;
283 if (bits & LE_R1_OFL)
284 dev->stats.rx_over_errors++;
285 if (bits & LE_R1_FRA)
286 dev->stats.rx_frame_errors++;
287 if (bits & LE_R1_EOP)
288 dev->stats.rx_errors++;
289 } else {
290 int len = (rd->mblength & 0xfff) - 4;
291 struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
292
293 if (!skb) {
294 dev->stats.rx_dropped++;
295 rd->mblength = 0;
296 rd->rmd1_bits = LE_R1_OWN;
297 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
298 return 0;
299 }
300
301 skb_reserve(skb, 2); /* 16 byte align */
302 skb_put(skb, len); /* make room */
303 skb_copy_to_linear_data(skb,
304 (unsigned char *)&ib->rx_buf[lp->rx_new][0],
305 len);
306 skb->protocol = eth_type_trans(skb, dev);
307 netif_rx(skb);
308 dev->stats.rx_packets++;
309 dev->stats.rx_bytes += len;
310 }
311
312 /* Return the packet to the pool */
313 rd->mblength = 0;
314 rd->rmd1_bits = LE_R1_OWN;
315 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
316 }
317 return 0;
318}
319
320static int lance_tx(struct net_device *dev)
321{
322 struct lance_private *lp = netdev_priv(dev);
323 volatile struct lance_init_block *ib = lp->init_block;
324 volatile struct lance_regs *ll = lp->ll;
325 volatile struct lance_tx_desc *td;
326 int i, j;
327 int status;
328
329 /* csr0 is 2f3 */
330 ll->rdp = LE_C0_TINT | LE_C0_INEA;
331 /* csr0 is 73 */
332
333 j = lp->tx_old;
334 for (i = j; i != lp->tx_new; i = j) {
335 td = &ib->btx_ring[i];
336
337 /* If we hit a packet not owned by us, stop */
338 if (td->tmd1_bits & LE_T1_OWN)
339 break;
340
341 if (td->tmd1_bits & LE_T1_ERR) {
342 status = td->misc;
343
344 dev->stats.tx_errors++;
345 if (status & LE_T3_RTY)
346 dev->stats.tx_aborted_errors++;
347 if (status & LE_T3_LCOL)
348 dev->stats.tx_window_errors++;
349
350 if (status & LE_T3_CLOS) {
351 dev->stats.tx_carrier_errors++;
352 if (lp->auto_select) {
353 lp->tpe = 1 - lp->tpe;
354 netdev_err(dev, "Carrier Lost, trying %s\n",
355 lp->tpe ? "TPE" : "AUI");
356 /* Stop the lance */
357 ll->rap = LE_CSR0;
358 ll->rdp = LE_C0_STOP;
359 lance_init_ring(dev);
360 load_csrs(lp);
361 init_restart_lance(lp);
362 return 0;
363 }
364 }
365
366 /* buffer errors and underflows turn off
367 * the transmitter, so restart the adapter
368 */
369 if (status & (LE_T3_BUF | LE_T3_UFL)) {
370 dev->stats.tx_fifo_errors++;
371
372 netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
373 /* Stop the lance */
374 ll->rap = LE_CSR0;
375 ll->rdp = LE_C0_STOP;
376 lance_init_ring(dev);
377 load_csrs(lp);
378 init_restart_lance(lp);
379 return 0;
380 }
381 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
382 /* So we don't count the packet more than once. */
383 td->tmd1_bits &= ~(LE_T1_POK);
384
385 /* One collision before packet was sent. */
386 if (td->tmd1_bits & LE_T1_EONE)
387 dev->stats.collisions++;
388
389 /* More than one collision, be optimistic. */
390 if (td->tmd1_bits & LE_T1_EMORE)
391 dev->stats.collisions += 2;
392
393 dev->stats.tx_packets++;
394 }
395
396 j = (j + 1) & lp->tx_ring_mod_mask;
397 }
398 lp->tx_old = j;
399 ll->rdp = LE_C0_TINT | LE_C0_INEA;
400 return 0;
401}
402
403static int lance_tx_buffs_avail(struct lance_private *lp)
404{
405 if (lp->tx_old <= lp->tx_new)
406 return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
407 return lp->tx_old - lp->tx_new - 1;
408}
409
410static irqreturn_t lance_interrupt(int irq, void *dev_id)
411{
412 struct net_device *dev = dev_id;
413 struct lance_private *lp = netdev_priv(dev);
414 volatile struct lance_regs *ll = lp->ll;
415 int csr0;
416
417 ll->rap = LE_CSR0; /* LANCE Controller Status */
418 csr0 = ll->rdp;
419
420 if (!(csr0 & LE_C0_INTR)) /* Check if any interrupt has */
421 return IRQ_NONE; /* been generated by the Lance. */
422
423 /* Acknowledge all the interrupt sources ASAP */
424 ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
425 LE_C0_INIT);
426
427 if (csr0 & LE_C0_ERR) {
428 /* Clear the error condition */
429 ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
430 }
431
432 if (csr0 & LE_C0_RINT)
433 lance_rx(dev);
434
435 if (csr0 & LE_C0_TINT)
436 lance_tx(dev);
437
438 /* Log misc errors. */
439 if (csr0 & LE_C0_BABL)
440 dev->stats.tx_errors++; /* Tx babble. */
441 if (csr0 & LE_C0_MISS)
442 dev->stats.rx_errors++; /* Missed a Rx frame. */
443 if (csr0 & LE_C0_MERR) {
444 netdev_err(dev, "Bus master arbitration failure, status %04x\n",
445 csr0);
446 /* Restart the chip. */
447 ll->rdp = LE_C0_STRT;
448 }
449
450 if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
451 netif_wake_queue(dev);
452
453 ll->rap = LE_CSR0;
454 ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
455 LE_C0_IDON | LE_C0_INEA);
456 return IRQ_HANDLED;
457}
458
459static int lance_open(struct net_device *dev)
460{
461 struct lance_private *lp = netdev_priv(dev);
462 volatile struct lance_regs *ll = lp->ll;
463 int ret;
464
465 /* Stop the Lance */
466 ll->rap = LE_CSR0;
467 ll->rdp = LE_C0_STOP;
468
469 /* Install the Interrupt handler */
470 ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
471 dev->name, dev);
472 if (ret)
473 return ret;
474
475 load_csrs(lp);
476 lance_init_ring(dev);
477
478 netif_start_queue(dev);
479
480 return init_restart_lance(lp);
481}
482
483static int lance_close(struct net_device *dev)
484{
485 struct lance_private *lp = netdev_priv(dev);
486 volatile struct lance_regs *ll = lp->ll;
487
488 netif_stop_queue(dev);
489 del_timer_sync(&lp->multicast_timer);
490
491 /* Stop the card */
492 ll->rap = LE_CSR0;
493 ll->rdp = LE_C0_STOP;
494
495 free_irq(IRQ_AMIGA_PORTS, dev);
496 return 0;
497}
498
499static inline int lance_reset(struct net_device *dev)
500{
501 struct lance_private *lp = netdev_priv(dev);
502 volatile struct lance_regs *ll = lp->ll;
503 int status;
504
505 /* Stop the lance */
506 ll->rap = LE_CSR0;
507 ll->rdp = LE_C0_STOP;
508
509 load_csrs(lp);
510
511 lance_init_ring(dev);
512 netif_trans_update(dev); /* prevent tx timeout */
513 netif_start_queue(dev);
514
515 status = init_restart_lance(lp);
516 netdev_dbg(dev, "Lance restart=%d\n", status);
517
518 return status;
519}
520
521static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
522{
523 struct lance_private *lp = netdev_priv(dev);
524 volatile struct lance_regs *ll = lp->ll;
525
526 netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
527 lance_reset(dev);
528 netif_wake_queue(dev);
529}
530
531static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
532 struct net_device *dev)
533{
534 struct lance_private *lp = netdev_priv(dev);
535 volatile struct lance_regs *ll = lp->ll;
536 volatile struct lance_init_block *ib = lp->init_block;
537 int entry, skblen;
538 int status = NETDEV_TX_OK;
539 unsigned long flags;
540
541 if (skb_padto(skb, ETH_ZLEN))
542 return NETDEV_TX_OK;
543 skblen = max_t(unsigned, skb->len, ETH_ZLEN);
544
545 local_irq_save(flags);
546
547 if (!lance_tx_buffs_avail(lp))
548 goto out_free;
549
550 /* dump the packet */
551 print_hex_dump_debug("skb->data: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
552 64, true);
553
554 entry = lp->tx_new & lp->tx_ring_mod_mask;
555 ib->btx_ring[entry].length = (-skblen) | 0xf000;
556 ib->btx_ring[entry].misc = 0;
557
558 skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
559
560 /* Now, give the packet to the lance */
561 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
562 lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
563 dev->stats.tx_bytes += skblen;
564
565 if (lance_tx_buffs_avail(lp) <= 0)
566 netif_stop_queue(dev);
567
568 /* Kick the lance: transmit now */
569 ll->rdp = LE_C0_INEA | LE_C0_TDMD;
570 out_free:
571 dev_kfree_skb(skb);
572
573 local_irq_restore(flags);
574
575 return status;
576}
577
578/* taken from the depca driver */
579static void lance_load_multicast(struct net_device *dev)
580{
581 struct lance_private *lp = netdev_priv(dev);
582 volatile struct lance_init_block *ib = lp->init_block;
583 volatile u16 *mcast_table = (u16 *)&ib->filter;
584 struct netdev_hw_addr *ha;
585 u32 crc;
586
587 /* set all multicast bits */
588 if (dev->flags & IFF_ALLMULTI) {
589 ib->filter[0] = 0xffffffff;
590 ib->filter[1] = 0xffffffff;
591 return;
592 }
593 /* clear the multicast filter */
594 ib->filter[0] = 0;
595 ib->filter[1] = 0;
596
597 /* Add addresses */
598 netdev_for_each_mc_addr(ha, dev) {
599 crc = ether_crc_le(6, ha->addr);
600 crc = crc >> 26;
601 mcast_table[crc >> 4] |= 1 << (crc & 0xf);
602 }
603}
604
605static void lance_set_multicast(struct net_device *dev)
606{
607 struct lance_private *lp = netdev_priv(dev);
608 volatile struct lance_init_block *ib = lp->init_block;
609 volatile struct lance_regs *ll = lp->ll;
610
611 if (!netif_running(dev))
612 return;
613
614 if (lp->tx_old != lp->tx_new) {
615 mod_timer(&lp->multicast_timer, jiffies + 4);
616 netif_wake_queue(dev);
617 return;
618 }
619
620 netif_stop_queue(dev);
621
622 ll->rap = LE_CSR0;
623 ll->rdp = LE_C0_STOP;
624 lance_init_ring(dev);
625
626 if (dev->flags & IFF_PROMISC) {
627 ib->mode |= LE_MO_PROM;
628 } else {
629 ib->mode &= ~LE_MO_PROM;
630 lance_load_multicast(dev);
631 }
632 load_csrs(lp);
633 init_restart_lance(lp);
634 netif_wake_queue(dev);
635}
636
637static void lance_set_multicast_retry(struct timer_list *t)
638{
639 struct lance_private *lp = from_timer(lp, t, multicast_timer);
640
641 lance_set_multicast(lp->dev);
642}
643
644static int a2065_init_one(struct zorro_dev *z,
645 const struct zorro_device_id *ent);
646static void a2065_remove_one(struct zorro_dev *z);
647
648
649static const struct zorro_device_id a2065_zorro_tbl[] = {
650 { ZORRO_PROD_CBM_A2065_1 },
651 { ZORRO_PROD_CBM_A2065_2 },
652 { ZORRO_PROD_AMERISTAR_A2065 },
653 { 0 }
654};
655MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
656
657static struct zorro_driver a2065_driver = {
658 .name = "a2065",
659 .id_table = a2065_zorro_tbl,
660 .probe = a2065_init_one,
661 .remove = a2065_remove_one,
662};
663
664static const struct net_device_ops lance_netdev_ops = {
665 .ndo_open = lance_open,
666 .ndo_stop = lance_close,
667 .ndo_start_xmit = lance_start_xmit,
668 .ndo_tx_timeout = lance_tx_timeout,
669 .ndo_set_rx_mode = lance_set_multicast,
670 .ndo_validate_addr = eth_validate_addr,
671 .ndo_set_mac_address = eth_mac_addr,
672};
673
674static int a2065_init_one(struct zorro_dev *z,
675 const struct zorro_device_id *ent)
676{
677 struct net_device *dev;
678 struct lance_private *priv;
679 unsigned long board = z->resource.start;
680 unsigned long base_addr = board + A2065_LANCE;
681 unsigned long mem_start = board + A2065_RAM;
682 struct resource *r1, *r2;
683 u8 addr[ETH_ALEN];
684 u32 serial;
685 int err;
686
687 r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
688 "Am7990");
689 if (!r1)
690 return -EBUSY;
691 r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
692 if (!r2) {
693 release_mem_region(base_addr, sizeof(struct lance_regs));
694 return -EBUSY;
695 }
696
697 dev = alloc_etherdev(sizeof(struct lance_private));
698 if (!dev) {
699 release_mem_region(base_addr, sizeof(struct lance_regs));
700 release_mem_region(mem_start, A2065_RAM_SIZE);
701 return -ENOMEM;
702 }
703
704 priv = netdev_priv(dev);
705
706 r1->name = dev->name;
707 r2->name = dev->name;
708
709 serial = be32_to_cpu(z->rom.er_SerialNumber);
710 addr[0] = 0x00;
711 if (z->id != ZORRO_PROD_AMERISTAR_A2065) { /* Commodore */
712 addr[1] = 0x80;
713 addr[2] = 0x10;
714 } else { /* Ameristar */
715 addr[1] = 0x00;
716 addr[2] = 0x9f;
717 }
718 addr[3] = (serial >> 16) & 0xff;
719 addr[4] = (serial >> 8) & 0xff;
720 addr[5] = serial & 0xff;
721 eth_hw_addr_set(dev, addr);
722 dev->base_addr = (unsigned long)ZTWO_VADDR(base_addr);
723 dev->mem_start = (unsigned long)ZTWO_VADDR(mem_start);
724 dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
725
726 priv->ll = (volatile struct lance_regs *)dev->base_addr;
727 priv->init_block = (struct lance_init_block *)dev->mem_start;
728 priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
729 priv->auto_select = 0;
730 priv->busmaster_regval = LE_C3_BSWP;
731
732 priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
733 priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
734 priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
735 priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
736 priv->dev = dev;
737
738 dev->netdev_ops = &lance_netdev_ops;
739 dev->watchdog_timeo = 5*HZ;
740 dev->dma = 0;
741
742 timer_setup(&priv->multicast_timer, lance_set_multicast_retry, 0);
743
744 err = register_netdev(dev);
745 if (err) {
746 release_mem_region(base_addr, sizeof(struct lance_regs));
747 release_mem_region(mem_start, A2065_RAM_SIZE);
748 free_netdev(dev);
749 return err;
750 }
751 zorro_set_drvdata(z, dev);
752
753 netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
754 board, dev->dev_addr);
755
756 return 0;
757}
758
759
760static void a2065_remove_one(struct zorro_dev *z)
761{
762 struct net_device *dev = zorro_get_drvdata(z);
763
764 unregister_netdev(dev);
765 release_mem_region(ZTWO_PADDR(dev->base_addr),
766 sizeof(struct lance_regs));
767 release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
768 free_netdev(dev);
769}
770
771static int __init a2065_init_module(void)
772{
773 return zorro_register_driver(&a2065_driver);
774}
775
776static void __exit a2065_cleanup_module(void)
777{
778 zorro_unregister_driver(&a2065_driver);
779}
780
781module_init(a2065_init_module);
782module_exit(a2065_cleanup_module);
783
784MODULE_DESCRIPTION("Commodore A2065 Ethernet driver");
785MODULE_LICENSE("GPL");
1/*
2 * Amiga Linux/68k A2065 Ethernet Driver
3 *
4 * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
5 *
6 * Fixes and tips by:
7 * - Janos Farkas (CHEXUM@sparta.banki.hu)
8 * - Jes Degn Soerensen (jds@kom.auc.dk)
9 * - Matt Domsch (Matt_Domsch@dell.com)
10 *
11 * ----------------------------------------------------------------------------
12 *
13 * This program is based on
14 *
15 * ariadne.?: Amiga Linux/68k Ariadne Ethernet Driver
16 * (C) Copyright 1995 by Geert Uytterhoeven,
17 * Peter De Schrijver
18 *
19 * lance.c: An AMD LANCE ethernet driver for linux.
20 * Written 1993-94 by Donald Becker.
21 *
22 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
23 * Advanced Micro Devices
24 * Publication #16907, Rev. B, Amendment/0, May 1994
25 *
26 * ----------------------------------------------------------------------------
27 *
28 * This file is subject to the terms and conditions of the GNU General Public
29 * License. See the file COPYING in the main directory of the Linux
30 * distribution for more details.
31 *
32 * ----------------------------------------------------------------------------
33 *
34 * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
35 *
36 * - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
37 * both 10BASE-2 (thin coax) and AUI (DB-15) connectors
38 */
39
40#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42/*#define DEBUG*/
43/*#define TEST_HITS*/
44
45#include <linux/errno.h>
46#include <linux/netdevice.h>
47#include <linux/etherdevice.h>
48#include <linux/module.h>
49#include <linux/stddef.h>
50#include <linux/kernel.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/skbuff.h>
54#include <linux/string.h>
55#include <linux/init.h>
56#include <linux/crc32.h>
57#include <linux/zorro.h>
58#include <linux/bitops.h>
59
60#include <asm/byteorder.h>
61#include <asm/irq.h>
62#include <asm/amigaints.h>
63#include <asm/amigahw.h>
64
65#include "a2065.h"
66
67/* Transmit/Receive Ring Definitions */
68
69#define LANCE_LOG_TX_BUFFERS (2)
70#define LANCE_LOG_RX_BUFFERS (4)
71
72#define TX_RING_SIZE (1 << LANCE_LOG_TX_BUFFERS)
73#define RX_RING_SIZE (1 << LANCE_LOG_RX_BUFFERS)
74
75#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
76#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
77
78#define PKT_BUF_SIZE (1544)
79#define RX_BUFF_SIZE PKT_BUF_SIZE
80#define TX_BUFF_SIZE PKT_BUF_SIZE
81
82/* Layout of the Lance's RAM Buffer */
83
84struct lance_init_block {
85 unsigned short mode; /* Pre-set mode (reg. 15) */
86 unsigned char phys_addr[6]; /* Physical ethernet address */
87 unsigned filter[2]; /* Multicast filter. */
88
89 /* Receive and transmit ring base, along with extra bits. */
90 unsigned short rx_ptr; /* receive descriptor addr */
91 unsigned short rx_len; /* receive len and high addr */
92 unsigned short tx_ptr; /* transmit descriptor addr */
93 unsigned short tx_len; /* transmit len and high addr */
94
95 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
96 struct lance_rx_desc brx_ring[RX_RING_SIZE];
97 struct lance_tx_desc btx_ring[TX_RING_SIZE];
98
99 char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
100 char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
101};
102
103/* Private Device Data */
104
105struct lance_private {
106 char *name;
107 volatile struct lance_regs *ll;
108 volatile struct lance_init_block *init_block; /* Hosts view */
109 volatile struct lance_init_block *lance_init_block; /* Lance view */
110
111 int rx_new, tx_new;
112 int rx_old, tx_old;
113
114 int lance_log_rx_bufs, lance_log_tx_bufs;
115 int rx_ring_mod_mask, tx_ring_mod_mask;
116
117 int tpe; /* cable-selection is TPE */
118 int auto_select; /* cable-selection by carrier */
119 unsigned short busmaster_regval;
120
121#ifdef CONFIG_SUNLANCE
122 struct Linux_SBus_DMA *ledma; /* if set this points to ledma and arch=4m */
123 int burst_sizes; /* ledma SBus burst sizes */
124#endif
125 struct timer_list multicast_timer;
126 struct net_device *dev;
127};
128
129#define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
130
131/* Load the CSR registers */
132static void load_csrs(struct lance_private *lp)
133{
134 volatile struct lance_regs *ll = lp->ll;
135 volatile struct lance_init_block *aib = lp->lance_init_block;
136 int leptr = LANCE_ADDR(aib);
137
138 ll->rap = LE_CSR1;
139 ll->rdp = (leptr & 0xFFFF);
140 ll->rap = LE_CSR2;
141 ll->rdp = leptr >> 16;
142 ll->rap = LE_CSR3;
143 ll->rdp = lp->busmaster_regval;
144
145 /* Point back to csr0 */
146 ll->rap = LE_CSR0;
147}
148
149/* Setup the Lance Rx and Tx rings */
150static void lance_init_ring(struct net_device *dev)
151{
152 struct lance_private *lp = netdev_priv(dev);
153 volatile struct lance_init_block *ib = lp->init_block;
154 volatile struct lance_init_block *aib = lp->lance_init_block;
155 /* for LANCE_ADDR computations */
156 int leptr;
157 int i;
158
159 /* Lock out other processes while setting up hardware */
160 netif_stop_queue(dev);
161 lp->rx_new = lp->tx_new = 0;
162 lp->rx_old = lp->tx_old = 0;
163
164 ib->mode = 0;
165
166 /* Copy the ethernet address to the lance init block
167 * Note that on the sparc you need to swap the ethernet address.
168 */
169 ib->phys_addr[0] = dev->dev_addr[1];
170 ib->phys_addr[1] = dev->dev_addr[0];
171 ib->phys_addr[2] = dev->dev_addr[3];
172 ib->phys_addr[3] = dev->dev_addr[2];
173 ib->phys_addr[4] = dev->dev_addr[5];
174 ib->phys_addr[5] = dev->dev_addr[4];
175
176 /* Setup the Tx ring entries */
177 netdev_dbg(dev, "TX rings:\n");
178 for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
179 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
180 ib->btx_ring[i].tmd0 = leptr;
181 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
182 ib->btx_ring[i].tmd1_bits = 0;
183 ib->btx_ring[i].length = 0xf000; /* The ones required by tmd2 */
184 ib->btx_ring[i].misc = 0;
185 if (i < 3)
186 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
187 }
188
189 /* Setup the Rx ring entries */
190 netdev_dbg(dev, "RX rings:\n");
191 for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
192 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
193
194 ib->brx_ring[i].rmd0 = leptr;
195 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
196 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
197 ib->brx_ring[i].length = -RX_BUFF_SIZE | 0xf000;
198 ib->brx_ring[i].mblength = 0;
199 if (i < 3)
200 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
201 }
202
203 /* Setup the initialization block */
204
205 /* Setup rx descriptor pointer */
206 leptr = LANCE_ADDR(&aib->brx_ring);
207 ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
208 ib->rx_ptr = leptr;
209 netdev_dbg(dev, "RX ptr: %08x\n", leptr);
210
211 /* Setup tx descriptor pointer */
212 leptr = LANCE_ADDR(&aib->btx_ring);
213 ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
214 ib->tx_ptr = leptr;
215 netdev_dbg(dev, "TX ptr: %08x\n", leptr);
216
217 /* Clear the multicast filter */
218 ib->filter[0] = 0;
219 ib->filter[1] = 0;
220}
221
222static int init_restart_lance(struct lance_private *lp)
223{
224 volatile struct lance_regs *ll = lp->ll;
225 int i;
226
227 ll->rap = LE_CSR0;
228 ll->rdp = LE_C0_INIT;
229
230 /* Wait for the lance to complete initialization */
231 for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
232 barrier();
233 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
234 pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
235 return -EIO;
236 }
237
238 /* Clear IDON by writing a "1", enable interrupts and start lance */
239 ll->rdp = LE_C0_IDON;
240 ll->rdp = LE_C0_INEA | LE_C0_STRT;
241
242 return 0;
243}
244
245static int lance_rx(struct net_device *dev)
246{
247 struct lance_private *lp = netdev_priv(dev);
248 volatile struct lance_init_block *ib = lp->init_block;
249 volatile struct lance_regs *ll = lp->ll;
250 volatile struct lance_rx_desc *rd;
251 unsigned char bits;
252
253#ifdef TEST_HITS
254 int i;
255 char buf[RX_RING_SIZE + 1];
256
257 for (i = 0; i < RX_RING_SIZE; i++) {
258 char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
259 if (i == lp->rx_new)
260 buf[i] = r1_own ? '_' : 'X';
261 else
262 buf[i] = r1_own ? '.' : '1';
263 }
264 buf[RX_RING_SIZE] = 0;
265
266 pr_debug("RxRing TestHits: [%s]\n", buf);
267#endif
268
269 ll->rdp = LE_C0_RINT | LE_C0_INEA;
270 for (rd = &ib->brx_ring[lp->rx_new];
271 !((bits = rd->rmd1_bits) & LE_R1_OWN);
272 rd = &ib->brx_ring[lp->rx_new]) {
273
274 /* We got an incomplete frame? */
275 if ((bits & LE_R1_POK) != LE_R1_POK) {
276 dev->stats.rx_over_errors++;
277 dev->stats.rx_errors++;
278 continue;
279 } else if (bits & LE_R1_ERR) {
280 /* Count only the end frame as a rx error,
281 * not the beginning
282 */
283 if (bits & LE_R1_BUF)
284 dev->stats.rx_fifo_errors++;
285 if (bits & LE_R1_CRC)
286 dev->stats.rx_crc_errors++;
287 if (bits & LE_R1_OFL)
288 dev->stats.rx_over_errors++;
289 if (bits & LE_R1_FRA)
290 dev->stats.rx_frame_errors++;
291 if (bits & LE_R1_EOP)
292 dev->stats.rx_errors++;
293 } else {
294 int len = (rd->mblength & 0xfff) - 4;
295 struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
296
297 if (!skb) {
298 dev->stats.rx_dropped++;
299 rd->mblength = 0;
300 rd->rmd1_bits = LE_R1_OWN;
301 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
302 return 0;
303 }
304
305 skb_reserve(skb, 2); /* 16 byte align */
306 skb_put(skb, len); /* make room */
307 skb_copy_to_linear_data(skb,
308 (unsigned char *)&ib->rx_buf[lp->rx_new][0],
309 len);
310 skb->protocol = eth_type_trans(skb, dev);
311 netif_rx(skb);
312 dev->stats.rx_packets++;
313 dev->stats.rx_bytes += len;
314 }
315
316 /* Return the packet to the pool */
317 rd->mblength = 0;
318 rd->rmd1_bits = LE_R1_OWN;
319 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
320 }
321 return 0;
322}
323
324static int lance_tx(struct net_device *dev)
325{
326 struct lance_private *lp = netdev_priv(dev);
327 volatile struct lance_init_block *ib = lp->init_block;
328 volatile struct lance_regs *ll = lp->ll;
329 volatile struct lance_tx_desc *td;
330 int i, j;
331 int status;
332
333 /* csr0 is 2f3 */
334 ll->rdp = LE_C0_TINT | LE_C0_INEA;
335 /* csr0 is 73 */
336
337 j = lp->tx_old;
338 for (i = j; i != lp->tx_new; i = j) {
339 td = &ib->btx_ring[i];
340
341 /* If we hit a packet not owned by us, stop */
342 if (td->tmd1_bits & LE_T1_OWN)
343 break;
344
345 if (td->tmd1_bits & LE_T1_ERR) {
346 status = td->misc;
347
348 dev->stats.tx_errors++;
349 if (status & LE_T3_RTY)
350 dev->stats.tx_aborted_errors++;
351 if (status & LE_T3_LCOL)
352 dev->stats.tx_window_errors++;
353
354 if (status & LE_T3_CLOS) {
355 dev->stats.tx_carrier_errors++;
356 if (lp->auto_select) {
357 lp->tpe = 1 - lp->tpe;
358 netdev_err(dev, "Carrier Lost, trying %s\n",
359 lp->tpe ? "TPE" : "AUI");
360 /* Stop the lance */
361 ll->rap = LE_CSR0;
362 ll->rdp = LE_C0_STOP;
363 lance_init_ring(dev);
364 load_csrs(lp);
365 init_restart_lance(lp);
366 return 0;
367 }
368 }
369
370 /* buffer errors and underflows turn off
371 * the transmitter, so restart the adapter
372 */
373 if (status & (LE_T3_BUF | LE_T3_UFL)) {
374 dev->stats.tx_fifo_errors++;
375
376 netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
377 /* Stop the lance */
378 ll->rap = LE_CSR0;
379 ll->rdp = LE_C0_STOP;
380 lance_init_ring(dev);
381 load_csrs(lp);
382 init_restart_lance(lp);
383 return 0;
384 }
385 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
386 /* So we don't count the packet more than once. */
387 td->tmd1_bits &= ~(LE_T1_POK);
388
389 /* One collision before packet was sent. */
390 if (td->tmd1_bits & LE_T1_EONE)
391 dev->stats.collisions++;
392
393 /* More than one collision, be optimistic. */
394 if (td->tmd1_bits & LE_T1_EMORE)
395 dev->stats.collisions += 2;
396
397 dev->stats.tx_packets++;
398 }
399
400 j = (j + 1) & lp->tx_ring_mod_mask;
401 }
402 lp->tx_old = j;
403 ll->rdp = LE_C0_TINT | LE_C0_INEA;
404 return 0;
405}
406
407static int lance_tx_buffs_avail(struct lance_private *lp)
408{
409 if (lp->tx_old <= lp->tx_new)
410 return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
411 return lp->tx_old - lp->tx_new - 1;
412}
413
414static irqreturn_t lance_interrupt(int irq, void *dev_id)
415{
416 struct net_device *dev = dev_id;
417 struct lance_private *lp = netdev_priv(dev);
418 volatile struct lance_regs *ll = lp->ll;
419 int csr0;
420
421 ll->rap = LE_CSR0; /* LANCE Controller Status */
422 csr0 = ll->rdp;
423
424 if (!(csr0 & LE_C0_INTR)) /* Check if any interrupt has */
425 return IRQ_NONE; /* been generated by the Lance. */
426
427 /* Acknowledge all the interrupt sources ASAP */
428 ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
429 LE_C0_INIT);
430
431 if (csr0 & LE_C0_ERR) {
432 /* Clear the error condition */
433 ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
434 }
435
436 if (csr0 & LE_C0_RINT)
437 lance_rx(dev);
438
439 if (csr0 & LE_C0_TINT)
440 lance_tx(dev);
441
442 /* Log misc errors. */
443 if (csr0 & LE_C0_BABL)
444 dev->stats.tx_errors++; /* Tx babble. */
445 if (csr0 & LE_C0_MISS)
446 dev->stats.rx_errors++; /* Missed a Rx frame. */
447 if (csr0 & LE_C0_MERR) {
448 netdev_err(dev, "Bus master arbitration failure, status %04x\n",
449 csr0);
450 /* Restart the chip. */
451 ll->rdp = LE_C0_STRT;
452 }
453
454 if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
455 netif_wake_queue(dev);
456
457 ll->rap = LE_CSR0;
458 ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
459 LE_C0_IDON | LE_C0_INEA);
460 return IRQ_HANDLED;
461}
462
463static int lance_open(struct net_device *dev)
464{
465 struct lance_private *lp = netdev_priv(dev);
466 volatile struct lance_regs *ll = lp->ll;
467 int ret;
468
469 /* Stop the Lance */
470 ll->rap = LE_CSR0;
471 ll->rdp = LE_C0_STOP;
472
473 /* Install the Interrupt handler */
474 ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
475 dev->name, dev);
476 if (ret)
477 return ret;
478
479 load_csrs(lp);
480 lance_init_ring(dev);
481
482 netif_start_queue(dev);
483
484 return init_restart_lance(lp);
485}
486
487static int lance_close(struct net_device *dev)
488{
489 struct lance_private *lp = netdev_priv(dev);
490 volatile struct lance_regs *ll = lp->ll;
491
492 netif_stop_queue(dev);
493 del_timer_sync(&lp->multicast_timer);
494
495 /* Stop the card */
496 ll->rap = LE_CSR0;
497 ll->rdp = LE_C0_STOP;
498
499 free_irq(IRQ_AMIGA_PORTS, dev);
500 return 0;
501}
502
503static inline int lance_reset(struct net_device *dev)
504{
505 struct lance_private *lp = netdev_priv(dev);
506 volatile struct lance_regs *ll = lp->ll;
507 int status;
508
509 /* Stop the lance */
510 ll->rap = LE_CSR0;
511 ll->rdp = LE_C0_STOP;
512
513 load_csrs(lp);
514
515 lance_init_ring(dev);
516 netif_trans_update(dev); /* prevent tx timeout */
517 netif_start_queue(dev);
518
519 status = init_restart_lance(lp);
520 netdev_dbg(dev, "Lance restart=%d\n", status);
521
522 return status;
523}
524
525static void lance_tx_timeout(struct net_device *dev)
526{
527 struct lance_private *lp = netdev_priv(dev);
528 volatile struct lance_regs *ll = lp->ll;
529
530 netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
531 lance_reset(dev);
532 netif_wake_queue(dev);
533}
534
535static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
536 struct net_device *dev)
537{
538 struct lance_private *lp = netdev_priv(dev);
539 volatile struct lance_regs *ll = lp->ll;
540 volatile struct lance_init_block *ib = lp->init_block;
541 int entry, skblen;
542 int status = NETDEV_TX_OK;
543 unsigned long flags;
544
545 if (skb_padto(skb, ETH_ZLEN))
546 return NETDEV_TX_OK;
547 skblen = max_t(unsigned, skb->len, ETH_ZLEN);
548
549 local_irq_save(flags);
550
551 if (!lance_tx_buffs_avail(lp))
552 goto out_free;
553
554#ifdef DEBUG
555 /* dump the packet */
556 print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
557 16, 1, skb->data, 64, true);
558#endif
559 entry = lp->tx_new & lp->tx_ring_mod_mask;
560 ib->btx_ring[entry].length = (-skblen) | 0xf000;
561 ib->btx_ring[entry].misc = 0;
562
563 skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
564
565 /* Now, give the packet to the lance */
566 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
567 lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
568 dev->stats.tx_bytes += skblen;
569
570 if (lance_tx_buffs_avail(lp) <= 0)
571 netif_stop_queue(dev);
572
573 /* Kick the lance: transmit now */
574 ll->rdp = LE_C0_INEA | LE_C0_TDMD;
575 out_free:
576 dev_kfree_skb(skb);
577
578 local_irq_restore(flags);
579
580 return status;
581}
582
583/* taken from the depca driver */
584static void lance_load_multicast(struct net_device *dev)
585{
586 struct lance_private *lp = netdev_priv(dev);
587 volatile struct lance_init_block *ib = lp->init_block;
588 volatile u16 *mcast_table = (u16 *)&ib->filter;
589 struct netdev_hw_addr *ha;
590 u32 crc;
591
592 /* set all multicast bits */
593 if (dev->flags & IFF_ALLMULTI) {
594 ib->filter[0] = 0xffffffff;
595 ib->filter[1] = 0xffffffff;
596 return;
597 }
598 /* clear the multicast filter */
599 ib->filter[0] = 0;
600 ib->filter[1] = 0;
601
602 /* Add addresses */
603 netdev_for_each_mc_addr(ha, dev) {
604 crc = ether_crc_le(6, ha->addr);
605 crc = crc >> 26;
606 mcast_table[crc >> 4] |= 1 << (crc & 0xf);
607 }
608}
609
610static void lance_set_multicast(struct net_device *dev)
611{
612 struct lance_private *lp = netdev_priv(dev);
613 volatile struct lance_init_block *ib = lp->init_block;
614 volatile struct lance_regs *ll = lp->ll;
615
616 if (!netif_running(dev))
617 return;
618
619 if (lp->tx_old != lp->tx_new) {
620 mod_timer(&lp->multicast_timer, jiffies + 4);
621 netif_wake_queue(dev);
622 return;
623 }
624
625 netif_stop_queue(dev);
626
627 ll->rap = LE_CSR0;
628 ll->rdp = LE_C0_STOP;
629 lance_init_ring(dev);
630
631 if (dev->flags & IFF_PROMISC) {
632 ib->mode |= LE_MO_PROM;
633 } else {
634 ib->mode &= ~LE_MO_PROM;
635 lance_load_multicast(dev);
636 }
637 load_csrs(lp);
638 init_restart_lance(lp);
639 netif_wake_queue(dev);
640}
641
642static void lance_set_multicast_retry(struct timer_list *t)
643{
644 struct lance_private *lp = from_timer(lp, t, multicast_timer);
645
646 lance_set_multicast(lp->dev);
647}
648
649static int a2065_init_one(struct zorro_dev *z,
650 const struct zorro_device_id *ent);
651static void a2065_remove_one(struct zorro_dev *z);
652
653
654static const struct zorro_device_id a2065_zorro_tbl[] = {
655 { ZORRO_PROD_CBM_A2065_1 },
656 { ZORRO_PROD_CBM_A2065_2 },
657 { ZORRO_PROD_AMERISTAR_A2065 },
658 { 0 }
659};
660MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
661
662static struct zorro_driver a2065_driver = {
663 .name = "a2065",
664 .id_table = a2065_zorro_tbl,
665 .probe = a2065_init_one,
666 .remove = a2065_remove_one,
667};
668
669static const struct net_device_ops lance_netdev_ops = {
670 .ndo_open = lance_open,
671 .ndo_stop = lance_close,
672 .ndo_start_xmit = lance_start_xmit,
673 .ndo_tx_timeout = lance_tx_timeout,
674 .ndo_set_rx_mode = lance_set_multicast,
675 .ndo_validate_addr = eth_validate_addr,
676 .ndo_set_mac_address = eth_mac_addr,
677};
678
679static int a2065_init_one(struct zorro_dev *z,
680 const struct zorro_device_id *ent)
681{
682 struct net_device *dev;
683 struct lance_private *priv;
684 unsigned long board = z->resource.start;
685 unsigned long base_addr = board + A2065_LANCE;
686 unsigned long mem_start = board + A2065_RAM;
687 struct resource *r1, *r2;
688 u32 serial;
689 int err;
690
691 r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
692 "Am7990");
693 if (!r1)
694 return -EBUSY;
695 r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
696 if (!r2) {
697 release_mem_region(base_addr, sizeof(struct lance_regs));
698 return -EBUSY;
699 }
700
701 dev = alloc_etherdev(sizeof(struct lance_private));
702 if (dev == NULL) {
703 release_mem_region(base_addr, sizeof(struct lance_regs));
704 release_mem_region(mem_start, A2065_RAM_SIZE);
705 return -ENOMEM;
706 }
707
708 priv = netdev_priv(dev);
709
710 r1->name = dev->name;
711 r2->name = dev->name;
712
713 serial = be32_to_cpu(z->rom.er_SerialNumber);
714 dev->dev_addr[0] = 0x00;
715 if (z->id != ZORRO_PROD_AMERISTAR_A2065) { /* Commodore */
716 dev->dev_addr[1] = 0x80;
717 dev->dev_addr[2] = 0x10;
718 } else { /* Ameristar */
719 dev->dev_addr[1] = 0x00;
720 dev->dev_addr[2] = 0x9f;
721 }
722 dev->dev_addr[3] = (serial >> 16) & 0xff;
723 dev->dev_addr[4] = (serial >> 8) & 0xff;
724 dev->dev_addr[5] = serial & 0xff;
725 dev->base_addr = (unsigned long)ZTWO_VADDR(base_addr);
726 dev->mem_start = (unsigned long)ZTWO_VADDR(mem_start);
727 dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
728
729 priv->ll = (volatile struct lance_regs *)dev->base_addr;
730 priv->init_block = (struct lance_init_block *)dev->mem_start;
731 priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
732 priv->auto_select = 0;
733 priv->busmaster_regval = LE_C3_BSWP;
734
735 priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
736 priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
737 priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
738 priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
739 priv->dev = dev;
740
741 dev->netdev_ops = &lance_netdev_ops;
742 dev->watchdog_timeo = 5*HZ;
743 dev->dma = 0;
744
745 timer_setup(&priv->multicast_timer, lance_set_multicast_retry, 0);
746
747 err = register_netdev(dev);
748 if (err) {
749 release_mem_region(base_addr, sizeof(struct lance_regs));
750 release_mem_region(mem_start, A2065_RAM_SIZE);
751 free_netdev(dev);
752 return err;
753 }
754 zorro_set_drvdata(z, dev);
755
756 netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
757 board, dev->dev_addr);
758
759 return 0;
760}
761
762
763static void a2065_remove_one(struct zorro_dev *z)
764{
765 struct net_device *dev = zorro_get_drvdata(z);
766
767 unregister_netdev(dev);
768 release_mem_region(ZTWO_PADDR(dev->base_addr),
769 sizeof(struct lance_regs));
770 release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
771 free_netdev(dev);
772}
773
774static int __init a2065_init_module(void)
775{
776 return zorro_register_driver(&a2065_driver);
777}
778
779static void __exit a2065_cleanup_module(void)
780{
781 zorro_unregister_driver(&a2065_driver);
782}
783
784module_init(a2065_init_module);
785module_exit(a2065_cleanup_module);
786
787MODULE_LICENSE("GPL");