2 * Amiga Linux/m68k Ariadne Ethernet Driver
4 * © Copyright 1995-2003 by Geert Uytterhoeven (geert@linux-m68k.org)
5 * Peter De Schrijver (p2@mind.be)
7 * ---------------------------------------------------------------------------
9 * This program is based on
11 * lance.c: An AMD LANCE ethernet driver for linux.
12 * Written 1993-94 by Donald Becker.
14 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
15 * Advanced Micro Devices
16 * Publication #16907, Rev. B, Amendment/0, May 1994
18 * MC68230: Parallel Interface/Timer (PI/T)
19 * Motorola Semiconductors, December, 1983
21 * ---------------------------------------------------------------------------
23 * This file is subject to the terms and conditions of the GNU General Public
24 * License. See the file COPYING in the main directory of the Linux
25 * distribution for more details.
27 * ---------------------------------------------------------------------------
29 * The Ariadne is a Zorro-II board made by Village Tronic. It contains:
31 * - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
32 * 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
34 * - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
37 #include <linux/module.h>
38 #include <linux/stddef.h>
39 #include <linux/kernel.h>
40 #include <linux/string.h>
41 #include <linux/errno.h>
42 #include <linux/ioport.h>
43 #include <linux/netdevice.h>
44 #include <linux/etherdevice.h>
45 #include <linux/interrupt.h>
46 #include <linux/skbuff.h>
47 #include <linux/init.h>
48 #include <linux/zorro.h>
49 #include <linux/bitops.h>
51 #include <asm/amigaints.h>
52 #include <asm/amigahw.h>
59 int ariadne_debug = ARIADNE_DEBUG;
61 int ariadne_debug = 1;
66 * Macros to Fix Endianness problems
69 /* Swap the Bytes in a WORD */
70 #define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
71 /* Get the Low BYTE in a WORD */
72 #define lowb(x) (x&0xff)
73 /* Get the Swapped High WORD in a LONG */
74 #define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
75 /* Get the Swapped Low WORD in a LONG */
76 #define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
80 * Transmit/Receive Ring Definitions
83 #define TX_RING_SIZE 5
84 #define RX_RING_SIZE 16
86 #define PKT_BUF_SIZE 1520
93 struct ariadne_private {
94 volatile struct TDRE *tx_ring[TX_RING_SIZE];
95 volatile struct RDRE *rx_ring[RX_RING_SIZE];
96 volatile u_short *tx_buff[TX_RING_SIZE];
97 volatile u_short *rx_buff[RX_RING_SIZE];
98 int cur_tx, cur_rx; /* The next free ring entry */
99 int dirty_tx; /* The ring entries to be free()ed. */
105 * Structure Created in the Ariadne's RAM Buffer
109 struct TDRE tx_ring[TX_RING_SIZE];
110 struct RDRE rx_ring[RX_RING_SIZE];
111 u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
112 u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
115 static int ariadne_open(struct net_device *dev);
116 static void ariadne_init_ring(struct net_device *dev);
117 static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
118 struct net_device *dev);
119 static void ariadne_tx_timeout(struct net_device *dev);
120 static int ariadne_rx(struct net_device *dev);
121 static void ariadne_reset(struct net_device *dev);
122 static irqreturn_t ariadne_interrupt(int irq, void *data);
123 static int ariadne_close(struct net_device *dev);
124 static struct net_device_stats *ariadne_get_stats(struct net_device *dev);
125 static void set_multicast_list(struct net_device *dev);
128 static void memcpyw(volatile u_short *dest, u_short *src, int len)
131 *(dest++) = *(src++);
135 *dest = (*(u_char *)src)<<8;
139 static int __devinit ariadne_init_one(struct zorro_dev *z,
140 const struct zorro_device_id *ent);
141 static void __devexit ariadne_remove_one(struct zorro_dev *z);
144 static struct zorro_device_id ariadne_zorro_tbl[] __devinitdata = {
145 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE },
148 MODULE_DEVICE_TABLE(zorro, ariadne_zorro_tbl);
150 static struct zorro_driver ariadne_driver = {
152 .id_table = ariadne_zorro_tbl,
153 .probe = ariadne_init_one,
154 .remove = __devexit_p(ariadne_remove_one),
157 static const struct net_device_ops ariadne_netdev_ops = {
158 .ndo_open = ariadne_open,
159 .ndo_stop = ariadne_close,
160 .ndo_start_xmit = ariadne_start_xmit,
161 .ndo_tx_timeout = ariadne_tx_timeout,
162 .ndo_get_stats = ariadne_get_stats,
163 .ndo_set_multicast_list = set_multicast_list,
164 .ndo_validate_addr = eth_validate_addr,
165 .ndo_change_mtu = eth_change_mtu,
166 .ndo_set_mac_address = eth_mac_addr,
169 static int __devinit ariadne_init_one(struct zorro_dev *z,
170 const struct zorro_device_id *ent)
172 unsigned long board = z->resource.start;
173 unsigned long base_addr = board+ARIADNE_LANCE;
174 unsigned long mem_start = board+ARIADNE_RAM;
175 struct resource *r1, *r2;
176 struct net_device *dev;
177 struct ariadne_private *priv;
180 r1 = request_mem_region(base_addr, sizeof(struct Am79C960), "Am79C960");
183 r2 = request_mem_region(mem_start, ARIADNE_RAM_SIZE, "RAM");
185 release_resource(r1);
189 dev = alloc_etherdev(sizeof(struct ariadne_private));
191 release_resource(r1);
192 release_resource(r2);
196 priv = netdev_priv(dev);
198 r1->name = dev->name;
199 r2->name = dev->name;
201 dev->dev_addr[0] = 0x00;
202 dev->dev_addr[1] = 0x60;
203 dev->dev_addr[2] = 0x30;
204 dev->dev_addr[3] = (z->rom.er_SerialNumber>>16) & 0xff;
205 dev->dev_addr[4] = (z->rom.er_SerialNumber>>8) & 0xff;
206 dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
207 dev->base_addr = ZTWO_VADDR(base_addr);
208 dev->mem_start = ZTWO_VADDR(mem_start);
209 dev->mem_end = dev->mem_start+ARIADNE_RAM_SIZE;
211 dev->netdev_ops = &ariadne_netdev_ops;
212 dev->watchdog_timeo = 5*HZ;
214 err = register_netdev(dev);
216 release_resource(r1);
217 release_resource(r2);
221 zorro_set_drvdata(z, dev);
223 printk(KERN_INFO "%s: Ariadne at 0x%08lx, Ethernet Address %pM\n",
224 dev->name, board, dev->dev_addr);
230 static int ariadne_open(struct net_device *dev)
232 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
237 /* Reset the LANCE */
241 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
244 /* Check the LANCE version */
245 lance->RAP = CSR88; /* Chip ID */
246 version = swapw(lance->RDP);
247 lance->RAP = CSR89; /* Chip ID */
248 version |= swapw(lance->RDP)<<16;
249 if ((version & 0x00000fff) != 0x00000003) {
250 printk(KERN_WARNING "ariadne_open: Couldn't find AMD Ethernet Chip\n");
253 if ((version & 0x0ffff000) != 0x00003000) {
254 printk(KERN_WARNING "ariadne_open: Couldn't find Am79C960 (Wrong part "
255 "number = %ld)\n", (version & 0x0ffff000)>>12);
259 printk(KERN_DEBUG "ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
260 (version & 0xf0000000)>>28);
263 ariadne_init_ring(dev);
265 /* Miscellaneous Stuff */
266 lance->RAP = CSR3; /* Interrupt Masks and Deferral Control */
268 lance->RAP = CSR4; /* Test and Features Control */
269 lance->RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
271 /* Set the Multicast Table */
272 lance->RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
274 lance->RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
276 lance->RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
278 lance->RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
281 /* Set the Ethernet Hardware Address */
282 lance->RAP = CSR12; /* Physical Address Register, PADR[15:0] */
283 lance->RDP = ((u_short *)&dev->dev_addr[0])[0];
284 lance->RAP = CSR13; /* Physical Address Register, PADR[31:16] */
285 lance->RDP = ((u_short *)&dev->dev_addr[0])[1];
286 lance->RAP = CSR14; /* Physical Address Register, PADR[47:32] */
287 lance->RDP = ((u_short *)&dev->dev_addr[0])[2];
289 /* Set the Init Block Mode */
290 lance->RAP = CSR15; /* Mode Register */
293 /* Set the Transmit Descriptor Ring Pointer */
294 lance->RAP = CSR30; /* Base Address of Transmit Ring */
295 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
296 lance->RAP = CSR31; /* Base Address of transmit Ring */
297 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_ring));
299 /* Set the Receive Descriptor Ring Pointer */
300 lance->RAP = CSR24; /* Base Address of Receive Ring */
301 lance->RDP = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
302 lance->RAP = CSR25; /* Base Address of Receive Ring */
303 lance->RDP = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_ring));
305 /* Set the Number of RX and TX Ring Entries */
306 lance->RAP = CSR76; /* Receive Ring Length */
307 lance->RDP = swapw(((u_short)-RX_RING_SIZE));
308 lance->RAP = CSR78; /* Transmit Ring Length */
309 lance->RDP = swapw(((u_short)-TX_RING_SIZE));
311 /* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
312 lance->RAP = ISACSR2; /* Miscellaneous Configuration */
316 lance->RAP = ISACSR5; /* LED1 Status */
317 lance->IDP = PSE|XMTE;
318 lance->RAP = ISACSR6; /* LED2 Status */
319 lance->IDP = PSE|COLE;
320 lance->RAP = ISACSR7; /* LED3 Status */
321 lance->IDP = PSE|RCVE;
323 netif_start_queue(dev);
325 i = request_irq(IRQ_AMIGA_PORTS, ariadne_interrupt, IRQF_SHARED,
329 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
330 lance->RDP = INEA|STRT;
336 static void ariadne_init_ring(struct net_device *dev)
338 struct ariadne_private *priv = netdev_priv(dev);
339 volatile struct lancedata *lancedata = (struct lancedata *)dev->mem_start;
342 netif_stop_queue(dev);
345 priv->cur_rx = priv->cur_tx = 0;
349 for (i = 0; i < TX_RING_SIZE; i++) {
350 volatile struct TDRE *t = &lancedata->tx_ring[i];
351 t->TMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i]));
352 t->TMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, tx_buff[i])) |
354 t->TMD2 = swapw((u_short)-PKT_BUF_SIZE);
356 priv->tx_ring[i] = &lancedata->tx_ring[i];
357 priv->tx_buff[i] = lancedata->tx_buff[i];
359 printk(KERN_DEBUG "TX Entry %2d at %p, Buf at %p\n", i,
360 &lancedata->tx_ring[i], lancedata->tx_buff[i]);
365 for (i = 0; i < RX_RING_SIZE; i++) {
366 volatile struct RDRE *r = &lancedata->rx_ring[i];
367 r->RMD0 = swloww(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i]));
368 r->RMD1 = swhighw(ARIADNE_RAM+offsetof(struct lancedata, rx_buff[i])) |
370 r->RMD2 = swapw((u_short)-PKT_BUF_SIZE);
372 priv->rx_ring[i] = &lancedata->rx_ring[i];
373 priv->rx_buff[i] = lancedata->rx_buff[i];
375 printk(KERN_DEBUG "RX Entry %2d at %p, Buf at %p\n", i,
376 &lancedata->rx_ring[i], lancedata->rx_buff[i]);
382 static int ariadne_close(struct net_device *dev)
384 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
386 netif_stop_queue(dev);
388 lance->RAP = CSR112; /* Missed Frame Count */
389 dev->stats.rx_missed_errors = swapw(lance->RDP);
390 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
392 if (ariadne_debug > 1) {
393 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %2.2x.\n",
394 dev->name, lance->RDP);
395 printk(KERN_DEBUG "%s: %lu packets missed\n", dev->name,
396 dev->stats.rx_missed_errors);
399 /* We stop the LANCE here -- it occasionally polls memory if we don't. */
402 free_irq(IRQ_AMIGA_PORTS, dev);
408 static inline void ariadne_reset(struct net_device *dev)
410 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
412 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
414 ariadne_init_ring(dev);
415 lance->RDP = INEA|STRT;
416 netif_start_queue(dev);
420 static irqreturn_t ariadne_interrupt(int irq, void *data)
422 struct net_device *dev = (struct net_device *)data;
423 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
424 struct ariadne_private *priv;
429 printk(KERN_WARNING "ariadne_interrupt(): irq for unknown device.\n");
433 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
435 if (!(lance->RDP & INTR)) /* Check if any interrupt has been */
436 return IRQ_NONE; /* generated by the board. */
438 priv = netdev_priv(dev);
441 while ((csr0 = lance->RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
442 /* Acknowledge all of the current interrupt sources ASAP. */
443 lance->RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
446 if (ariadne_debug > 5) {
447 printk(KERN_DEBUG "%s: interrupt csr0=%#2.2x new csr=%#2.2x.",
448 dev->name, csr0, lance->RDP);
486 if (csr0 & RINT) { /* Rx interrupt */
491 if (csr0 & TINT) { /* Tx-done interrupt */
492 int dirty_tx = priv->dirty_tx;
495 while (dirty_tx < priv->cur_tx) {
496 int entry = dirty_tx % TX_RING_SIZE;
497 int status = lowb(priv->tx_ring[entry]->TMD1);
500 break; /* It still hasn't been Txed */
502 priv->tx_ring[entry]->TMD1 &= 0xff00;
504 if (status & TF_ERR) {
505 /* There was an major error, log it. */
506 int err_status = priv->tx_ring[entry]->TMD3;
507 dev->stats.tx_errors++;
508 if (err_status & EF_RTRY)
509 dev->stats.tx_aborted_errors++;
510 if (err_status & EF_LCAR)
511 dev->stats.tx_carrier_errors++;
512 if (err_status & EF_LCOL)
513 dev->stats.tx_window_errors++;
514 if (err_status & EF_UFLO) {
515 /* Ackk! On FIFO errors the Tx unit is turned off! */
516 dev->stats.tx_fifo_errors++;
517 /* Remove this verbosity later! */
518 printk(KERN_ERR "%s: Tx FIFO error! Status %4.4x.\n",
520 /* Restart the chip. */
524 if (status & (TF_MORE|TF_ONE))
525 dev->stats.collisions++;
526 dev->stats.tx_packets++;
531 #ifndef final_version
532 if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
533 printk(KERN_ERR "out-of-sync dirty pointer, %d vs. %d, "
534 "full=%d.\n", dirty_tx, priv->cur_tx, priv->tx_full);
535 dirty_tx += TX_RING_SIZE;
539 if (priv->tx_full && netif_queue_stopped(dev) &&
540 dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
541 /* The ring is no longer full. */
543 netif_wake_queue(dev);
546 priv->dirty_tx = dirty_tx;
549 /* Log misc errors. */
552 dev->stats.tx_errors++; /* Tx babble. */
556 dev->stats.rx_errors++; /* Missed a Rx frame. */
560 printk(KERN_ERR "%s: Bus master arbitration failure, status "
561 "%4.4x.\n", dev->name, csr0);
562 /* Restart the chip. */
567 /* Clear any other interrupt, and set interrupt enable. */
568 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
569 lance->RDP = INEA|BABL|CERR|MISS|MERR|IDON;
572 if (ariadne_debug > 4)
573 printk(KERN_DEBUG "%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
574 lance->RAP, lance->RDP);
576 return IRQ_RETVAL(handled);
580 static void ariadne_tx_timeout(struct net_device *dev)
582 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
584 printk(KERN_ERR "%s: transmit timed out, status %4.4x, resetting.\n",
585 dev->name, lance->RDP);
587 netif_wake_queue(dev);
591 static netdev_tx_t ariadne_start_xmit(struct sk_buff *skb,
592 struct net_device *dev)
594 struct ariadne_private *priv = netdev_priv(dev);
595 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
601 if (ariadne_debug > 3) {
602 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
603 printk(KERN_DEBUG "%s: ariadne_start_xmit() called, csr0 %4.4x.\n",
604 dev->name, lance->RDP);
609 /* FIXME: is the 79C960 new enough to do its own padding right ? */
610 if (skb->len < ETH_ZLEN)
612 if (skb_padto(skb, ETH_ZLEN))
617 /* Fill in a Tx ring entry */
621 printk(KERN_DEBUG "TX pkt type 0x%04x from %pM to %pM "
622 " data 0x%08x len %d\n",
623 ((u_short *)skb->data)[6],
624 skb->data + 6, skb->data,
625 (int)skb->data, (int)skb->len);
629 local_irq_save(flags);
631 entry = priv->cur_tx % TX_RING_SIZE;
633 /* Caution: the write order is important here, set the base address with
634 the "ownership" bits last. */
636 priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
637 priv->tx_ring[entry]->TMD3 = 0x0000;
638 memcpyw(priv->tx_buff[entry], (u_short *)skb->data, len);
644 len = skb->len > 64 ? 64 : skb->len;
646 for (i = 0; i < len; i += 8) {
648 printk(KERN_DEBUG "%04x:", i);
649 for (j = 0; (j < 8) && ((i+j) < len); j++) {
652 printk("%04x", priv->tx_buff[entry][i+j]);
659 priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
664 if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
667 printk(KERN_DEBUG "*** Subtracting TX_RING_SIZE from cur_tx (%d) and "
668 "dirty_tx (%d)\n", priv->cur_tx, priv->dirty_tx);
671 priv->cur_tx -= TX_RING_SIZE;
672 priv->dirty_tx -= TX_RING_SIZE;
674 dev->stats.tx_bytes += len;
676 /* Trigger an immediate send poll. */
677 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
678 lance->RDP = INEA|TDMD;
680 if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) != 0) {
681 netif_stop_queue(dev);
684 local_irq_restore(flags);
690 static int ariadne_rx(struct net_device *dev)
692 struct ariadne_private *priv = netdev_priv(dev);
693 int entry = priv->cur_rx % RX_RING_SIZE;
696 /* If we own the next entry, it's a new packet. Send it up. */
697 while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
698 int status = lowb(priv->rx_ring[entry]->RMD1);
700 if (status != (RF_STP|RF_ENP)) { /* There was an error. */
701 /* There is a tricky error noted by John Murphy,
702 <murf@perftech.com> to Russ Nelson: Even with full-sized
703 buffers it's possible for a jabber packet to use two
704 buffers, with only the last correctly noting the error. */
706 /* Only count a general error at the end of a packet.*/
707 dev->stats.rx_errors++;
708 if (status & RF_FRAM)
709 dev->stats.rx_frame_errors++;
710 if (status & RF_OFLO)
711 dev->stats.rx_over_errors++;
713 dev->stats.rx_crc_errors++;
714 if (status & RF_BUFF)
715 dev->stats.rx_fifo_errors++;
716 priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
718 /* Malloc up new buffer, compatible with net-3. */
719 short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
722 skb = dev_alloc_skb(pkt_len+2);
724 printk(KERN_WARNING "%s: Memory squeeze, deferring packet.\n",
726 for (i = 0; i < RX_RING_SIZE; i++)
727 if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
730 if (i > RX_RING_SIZE-2) {
731 dev->stats.rx_dropped++;
732 priv->rx_ring[entry]->RMD1 |= RF_OWN;
739 skb_reserve(skb,2); /* 16 byte align */
740 skb_put(skb,pkt_len); /* Make room */
741 skb_copy_to_linear_data(skb, (char *)priv->rx_buff[entry], pkt_len);
742 skb->protocol=eth_type_trans(skb,dev);
745 printk(KERN_DEBUG "RX pkt type 0x%04x from ",
746 ((u_short *)skb->data)[6]);
748 u_char *ptr = &((u_char *)skb->data)[6];
753 u_char *ptr = (u_char *)skb->data;
756 printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
761 dev->stats.rx_packets++;
762 dev->stats.rx_bytes += pkt_len;
765 priv->rx_ring[entry]->RMD1 |= RF_OWN;
766 entry = (++priv->cur_rx) % RX_RING_SIZE;
769 priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
771 /* We should check that at least two ring entries are free. If not,
772 we should free one and mark stats->rx_dropped++. */
778 static struct net_device_stats *ariadne_get_stats(struct net_device *dev)
780 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
784 local_irq_save(flags);
785 saved_addr = lance->RAP;
786 lance->RAP = CSR112; /* Missed Frame Count */
787 dev->stats.rx_missed_errors = swapw(lance->RDP);
788 lance->RAP = saved_addr;
789 local_irq_restore(flags);
795 /* Set or clear the multicast filter for this adaptor.
796 num_addrs == -1 Promiscuous mode, receive all packets
797 num_addrs == 0 Normal mode, clear multicast list
798 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
799 best-effort filtering.
801 static void set_multicast_list(struct net_device *dev)
803 volatile struct Am79C960 *lance = (struct Am79C960*)dev->base_addr;
805 if (!netif_running(dev))
808 netif_stop_queue(dev);
810 /* We take the simple way out and always enable promiscuous mode. */
811 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
812 lance->RDP = STOP; /* Temporarily stop the lance. */
813 ariadne_init_ring(dev);
815 if (dev->flags & IFF_PROMISC) {
816 lance->RAP = CSR15; /* Mode Register */
817 lance->RDP = PROM; /* Set promiscuous mode */
819 short multicast_table[4];
820 int num_addrs = netdev_mc_count(dev);
822 /* We don't use the multicast table, but rely on upper-layer filtering. */
823 memset(multicast_table, (num_addrs == 0) ? 0 : -1,
824 sizeof(multicast_table));
825 for (i = 0; i < 4; i++) {
826 lance->RAP = CSR8+(i<<8); /* Logical Address Filter */
827 lance->RDP = swapw(multicast_table[i]);
829 lance->RAP = CSR15; /* Mode Register */
830 lance->RDP = 0x0000; /* Unset promiscuous mode */
833 lance->RAP = CSR0; /* PCnet-ISA Controller Status */
834 lance->RDP = INEA|STRT|IDON; /* Resume normal operation. */
836 netif_wake_queue(dev);
840 static void __devexit ariadne_remove_one(struct zorro_dev *z)
842 struct net_device *dev = zorro_get_drvdata(z);
844 unregister_netdev(dev);
845 release_mem_region(ZTWO_PADDR(dev->base_addr), sizeof(struct Am79C960));
846 release_mem_region(ZTWO_PADDR(dev->mem_start), ARIADNE_RAM_SIZE);
850 static int __init ariadne_init_module(void)
852 return zorro_register_driver(&ariadne_driver);
855 static void __exit ariadne_cleanup_module(void)
857 zorro_unregister_driver(&ariadne_driver);
860 module_init(ariadne_init_module);
861 module_exit(ariadne_cleanup_module);
863 MODULE_LICENSE("GPL");