1 /* sun3lance.c: Ethernet driver for SUN3 Lance chip */
4 Sun3 Lance ethernet driver, by Sam Creasey (sammy@users.qual.net).
5 This driver is a part of the linux kernel, and is thus distributed
6 under the GNU General Public License.
8 The values used in LANCE_OBIO and LANCE_IRQ seem to be empirically
9 true for the correct IRQ and address of the lance registers. They
10 have not been widely tested, however. What we probably need is a
11 "proper" way to search for a device in the sun3's prom, but, alas,
12 linux has no such thing.
14 This driver is largely based on atarilance.c, by Roman Hodek. Other
15 sources of inspiration were the NetBSD sun3 am7990 driver, and the
16 linux sparc lance driver (sunlance.c).
18 There are more assumptions made throughout this driver, it almost
19 certainly still needs work, but it does work at least for RARP/BOOTP and
20 mounting the root NFS filesystem.
24 static char *version = "sun3lance.c: v1.2 1/12/2001 Sam Creasey (sammy@sammy.net)\n";
26 #include <linux/module.h>
27 #include <linux/stddef.h>
28 #include <linux/kernel.h>
29 #include <linux/string.h>
30 #include <linux/errno.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/init.h>
34 #include <linux/ioport.h>
35 #include <linux/delay.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/skbuff.h>
39 #include <linux/bitops.h>
41 #include <asm/cacheflush.h>
42 #include <asm/setup.h>
45 #include <asm/pgtable.h>
47 #include <asm/idprom.h>
48 #include <asm/machines.h>
51 #include <asm/sun3mmu.h>
53 #include <asm/sun3xprom.h>
56 /* sun3/60 addr/irq for the lance chip. If your sun is different,
58 #define LANCE_OBIO 0x120000
59 #define LANCE_IRQ IRQ_AUTO_3
62 * 0 = silent, print only serious errors
63 * 1 = normal, print error messages
64 * 2 = debug, print debug infos
65 * 3 = debug, print even more debug infos (packet data)
71 static int lance_debug = LANCE_DEBUG;
73 static int lance_debug = 1;
75 module_param(lance_debug, int, 0);
76 MODULE_PARM_DESC(lance_debug, "SUN3 Lance debug level (0-3)");
77 MODULE_LICENSE("GPL");
79 #define DPRINTK(n,a) \
81 if (lance_debug >= n) \
86 /* we're only using 32k of memory, so we use 4 TX
87 buffers and 16 RX buffers. These values are expressed as log2. */
89 #define TX_LOG_RING_SIZE 3
90 #define RX_LOG_RING_SIZE 5
92 /* These are the derived values */
94 #define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
95 #define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
96 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
98 #define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
99 #define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
100 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
102 /* Definitions for packet buffer access: */
103 #define PKT_BUF_SZ 1544
105 /* Get the address of a packet buffer corresponding to a given buffer head */
106 #define PKTBUF_ADDR(head) (void *)((unsigned long)(MEM) | (head)->base)
109 /* The LANCE Rx and Tx ring descriptors. */
110 struct lance_rx_head {
111 unsigned short base; /* Low word of base addr */
112 volatile unsigned char flag;
113 unsigned char base_hi; /* High word of base addr (unused) */
114 short buf_length; /* This length is 2s complement! */
115 volatile short msg_length; /* This length is "normal". */
118 struct lance_tx_head {
119 unsigned short base; /* Low word of base addr */
120 volatile unsigned char flag;
121 unsigned char base_hi; /* High word of base addr (unused) */
122 short length; /* Length is 2s complement! */
126 /* The LANCE initialization block, described in databook. */
127 struct lance_init_block {
128 unsigned short mode; /* Pre-set mode */
129 unsigned char hwaddr[6]; /* Physical ethernet address */
130 unsigned int filter[2]; /* Multicast filter (unused). */
131 /* Receive and transmit ring base, along with length bits. */
136 unsigned short pad[4]; /* is thie needed? */
139 /* The whole layout of the Lance shared memory */
140 struct lance_memory {
141 struct lance_init_block init;
142 struct lance_tx_head tx_head[TX_RING_SIZE];
143 struct lance_rx_head rx_head[RX_RING_SIZE];
144 char rx_data[RX_RING_SIZE][PKT_BUF_SZ];
145 char tx_data[TX_RING_SIZE][PKT_BUF_SZ];
148 /* The driver's private device structure */
150 struct lance_private {
151 volatile unsigned short *iobase;
152 struct lance_memory *mem;
153 int new_rx, new_tx; /* The next free ring entry */
154 int old_tx, old_rx; /* ring entry to be processed */
155 /* These two must be longs for set_bit() */
160 /* I/O register access macros */
163 #define DREG lp->iobase[0]
164 #define AREG lp->iobase[1]
165 #define REGA(a) (*( AREG = (a), &DREG ))
167 /* Definitions for the Lance */
170 #define TMD1_ENP 0x01 /* end of packet */
171 #define TMD1_STP 0x02 /* start of packet */
172 #define TMD1_DEF 0x04 /* deferred */
173 #define TMD1_ONE 0x08 /* one retry needed */
174 #define TMD1_MORE 0x10 /* more than one retry needed */
175 #define TMD1_ERR 0x40 /* error summary */
176 #define TMD1_OWN 0x80 /* ownership (set: chip owns) */
178 #define TMD1_OWN_CHIP TMD1_OWN
179 #define TMD1_OWN_HOST 0
181 /* tx_head misc field */
182 #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
183 #define TMD3_RTRY 0x0400 /* failed after 16 retries */
184 #define TMD3_LCAR 0x0800 /* carrier lost */
185 #define TMD3_LCOL 0x1000 /* late collision */
186 #define TMD3_UFLO 0x4000 /* underflow (late memory) */
187 #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
190 #define RMD1_ENP 0x01 /* end of packet */
191 #define RMD1_STP 0x02 /* start of packet */
192 #define RMD1_BUFF 0x04 /* buffer error */
193 #define RMD1_CRC 0x08 /* CRC error */
194 #define RMD1_OFLO 0x10 /* overflow */
195 #define RMD1_FRAM 0x20 /* framing error */
196 #define RMD1_ERR 0x40 /* error summary */
197 #define RMD1_OWN 0x80 /* ownership (set: ship owns) */
199 #define RMD1_OWN_CHIP RMD1_OWN
200 #define RMD1_OWN_HOST 0
203 #define CSR0 0 /* mode/status */
204 #define CSR1 1 /* init block addr (low) */
205 #define CSR2 2 /* init block addr (high) */
206 #define CSR3 3 /* misc */
207 #define CSR8 8 /* address filter */
208 #define CSR15 15 /* promiscuous mode */
211 /* (R=readable, W=writeable, S=set on write, C=clear on write) */
212 #define CSR0_INIT 0x0001 /* initialize (RS) */
213 #define CSR0_STRT 0x0002 /* start (RS) */
214 #define CSR0_STOP 0x0004 /* stop (RS) */
215 #define CSR0_TDMD 0x0008 /* transmit demand (RS) */
216 #define CSR0_TXON 0x0010 /* transmitter on (R) */
217 #define CSR0_RXON 0x0020 /* receiver on (R) */
218 #define CSR0_INEA 0x0040 /* interrupt enable (RW) */
219 #define CSR0_INTR 0x0080 /* interrupt active (R) */
220 #define CSR0_IDON 0x0100 /* initialization done (RC) */
221 #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
222 #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
223 #define CSR0_MERR 0x0800 /* memory error (RC) */
224 #define CSR0_MISS 0x1000 /* missed frame (RC) */
225 #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
226 #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
227 #define CSR0_ERR 0x8000 /* error (RC) */
230 #define CSR3_BCON 0x0001 /* byte control */
231 #define CSR3_ACON 0x0002 /* ALE control */
232 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
234 /***************************** Prototypes *****************************/
236 static int lance_probe( struct net_device *dev);
237 static int lance_open( struct net_device *dev );
238 static void lance_init_ring( struct net_device *dev );
239 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
240 static irqreturn_t lance_interrupt( int irq, void *dev_id);
241 static int lance_rx( struct net_device *dev );
242 static int lance_close( struct net_device *dev );
243 static void set_multicast_list( struct net_device *dev );
245 /************************* End of Prototypes **************************/
247 struct net_device * __init sun3lance_probe(int unit)
249 struct net_device *dev;
253 if (!MACH_IS_SUN3 && !MACH_IS_SUN3X)
254 return ERR_PTR(-ENODEV);
256 /* check that this machine has an onboard lance */
257 switch(idprom->id_machtype) {
258 case SM_SUN3|SM_3_50:
259 case SM_SUN3|SM_3_60:
260 case SM_SUN3X|SM_3_80:
261 /* these machines have lance */
265 return ERR_PTR(-ENODEV);
269 return ERR_PTR(-ENODEV);
271 dev = alloc_etherdev(sizeof(struct lance_private));
273 return ERR_PTR(-ENOMEM);
275 sprintf(dev->name, "eth%d", unit);
276 netdev_boot_setup_check(dev);
279 if (!lance_probe(dev))
282 err = register_netdev(dev);
290 iounmap((void __iomem *)dev->base_addr);
297 static const struct net_device_ops lance_netdev_ops = {
298 .ndo_open = lance_open,
299 .ndo_stop = lance_close,
300 .ndo_start_xmit = lance_start_xmit,
301 .ndo_set_multicast_list = set_multicast_list,
302 .ndo_set_mac_address = NULL,
303 .ndo_change_mtu = eth_change_mtu,
304 .ndo_validate_addr = eth_validate_addr,
307 static int __init lance_probe( struct net_device *dev)
309 unsigned long ioaddr;
311 struct lance_private *lp;
313 static int did_version;
314 volatile unsigned short *ioaddr_probe;
315 unsigned short tmp1, tmp2;
318 ioaddr = (unsigned long)ioremap(LANCE_OBIO, PAGE_SIZE);
322 ioaddr = SUN3X_LANCE;
325 /* test to see if there's really a lance here */
326 /* (CSRO_INIT shouldn't be readable) */
328 ioaddr_probe = (volatile unsigned short *)ioaddr;
329 tmp1 = ioaddr_probe[0];
330 tmp2 = ioaddr_probe[1];
332 ioaddr_probe[1] = CSR0;
333 ioaddr_probe[0] = CSR0_INIT | CSR0_STOP;
335 if(ioaddr_probe[0] != CSR0_STOP) {
336 ioaddr_probe[0] = tmp1;
337 ioaddr_probe[1] = tmp2;
340 iounmap((void __iomem *)ioaddr);
345 lp = netdev_priv(dev);
348 MEM = dvma_malloc_align(sizeof(struct lance_memory), 0x10000);
351 iounmap((void __iomem *)ioaddr);
353 printk(KERN_WARNING "SUN3 Lance couldn't allocate DVMA memory\n");
357 lp->iobase = (volatile unsigned short *)ioaddr;
358 dev->base_addr = (unsigned long)ioaddr; /* informational only */
360 REGA(CSR0) = CSR0_STOP;
362 if (request_irq(LANCE_IRQ, lance_interrupt, IRQF_DISABLED, "SUN3 Lance", dev) < 0) {
364 iounmap((void __iomem *)ioaddr);
366 dvma_free((void *)MEM);
367 printk(KERN_WARNING "SUN3 Lance unable to allocate IRQ\n");
370 dev->irq = (unsigned short)LANCE_IRQ;
373 printk("%s: SUN3 Lance at io %#lx, mem %#lx, irq %d, hwaddr ",
375 (unsigned long)ioaddr,
379 /* copy in the ethernet address from the prom */
380 for(i = 0; i < 6 ; i++)
381 dev->dev_addr[i] = idprom->id_ethaddr[i];
383 /* tell the card it's ether address, bytes swapped */
384 MEM->init.hwaddr[0] = dev->dev_addr[1];
385 MEM->init.hwaddr[1] = dev->dev_addr[0];
386 MEM->init.hwaddr[2] = dev->dev_addr[3];
387 MEM->init.hwaddr[3] = dev->dev_addr[2];
388 MEM->init.hwaddr[4] = dev->dev_addr[5];
389 MEM->init.hwaddr[5] = dev->dev_addr[4];
391 printk("%pM\n", dev->dev_addr);
393 MEM->init.mode = 0x0000;
394 MEM->init.filter[0] = 0x00000000;
395 MEM->init.filter[1] = 0x00000000;
396 MEM->init.rdra = dvma_vtob(MEM->rx_head);
397 MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
398 (dvma_vtob(MEM->rx_head) >> 16);
399 MEM->init.tdra = dvma_vtob(MEM->tx_head);
400 MEM->init.tlen = (TX_LOG_RING_SIZE << 13) |
401 (dvma_vtob(MEM->tx_head) >> 16);
403 DPRINTK(2, ("initaddr: %08lx rx_ring: %08lx tx_ring: %08lx\n",
404 dvma_vtob(&(MEM->init)), dvma_vtob(MEM->rx_head),
405 (dvma_vtob(MEM->tx_head))));
407 if (did_version++ == 0)
410 dev->netdev_ops = &lance_netdev_ops;
411 // KLUDGE -- REMOVE ME
412 set_bit(__LINK_STATE_PRESENT, &dev->state);
418 static int lance_open( struct net_device *dev )
420 struct lance_private *lp = netdev_priv(dev);
423 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
425 REGA(CSR0) = CSR0_STOP;
427 lance_init_ring(dev);
429 /* From now on, AREG is kept to point to CSR0 */
430 REGA(CSR0) = CSR0_INIT;
434 if (DREG & CSR0_IDON)
436 if (i <= 0 || (DREG & CSR0_ERR)) {
437 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
438 dev->name, i, DREG ));
443 DREG = CSR0_IDON | CSR0_STRT | CSR0_INEA;
445 netif_start_queue(dev);
447 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
453 /* Initialize the LANCE Rx and Tx rings. */
455 static void lance_init_ring( struct net_device *dev )
457 struct lance_private *lp = netdev_priv(dev);
462 lp->new_rx = lp->new_tx = 0;
463 lp->old_rx = lp->old_tx = 0;
465 for( i = 0; i < TX_RING_SIZE; i++ ) {
466 MEM->tx_head[i].base = dvma_vtob(MEM->tx_data[i]);
467 MEM->tx_head[i].flag = 0;
468 MEM->tx_head[i].base_hi =
469 (dvma_vtob(MEM->tx_data[i])) >>16;
470 MEM->tx_head[i].length = 0;
471 MEM->tx_head[i].misc = 0;
474 for( i = 0; i < RX_RING_SIZE; i++ ) {
475 MEM->rx_head[i].base = dvma_vtob(MEM->rx_data[i]);
476 MEM->rx_head[i].flag = RMD1_OWN_CHIP;
477 MEM->rx_head[i].base_hi =
478 (dvma_vtob(MEM->rx_data[i])) >> 16;
479 MEM->rx_head[i].buf_length = -PKT_BUF_SZ | 0xf000;
480 MEM->rx_head[i].msg_length = 0;
483 /* tell the card it's ether address, bytes swapped */
484 MEM->init.hwaddr[0] = dev->dev_addr[1];
485 MEM->init.hwaddr[1] = dev->dev_addr[0];
486 MEM->init.hwaddr[2] = dev->dev_addr[3];
487 MEM->init.hwaddr[3] = dev->dev_addr[2];
488 MEM->init.hwaddr[4] = dev->dev_addr[5];
489 MEM->init.hwaddr[5] = dev->dev_addr[4];
491 MEM->init.mode = 0x0000;
492 MEM->init.filter[0] = 0x00000000;
493 MEM->init.filter[1] = 0x00000000;
494 MEM->init.rdra = dvma_vtob(MEM->rx_head);
495 MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
496 (dvma_vtob(MEM->rx_head) >> 16);
497 MEM->init.tdra = dvma_vtob(MEM->tx_head);
498 MEM->init.tlen = (TX_LOG_RING_SIZE << 13) |
499 (dvma_vtob(MEM->tx_head) >> 16);
502 /* tell the lance the address of its init block */
503 REGA(CSR1) = dvma_vtob(&(MEM->init));
504 REGA(CSR2) = dvma_vtob(&(MEM->init)) >> 16;
507 REGA(CSR3) = CSR3_BSWP | CSR3_ACON | CSR3_BCON;
509 REGA(CSR3) = CSR3_BSWP;
515 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
517 struct lance_private *lp = netdev_priv(dev);
519 struct lance_tx_head *head;
522 DPRINTK( 1, ( "%s: transmit start.\n",
525 /* Transmitter timeout, serious problems. */
526 if (netif_queue_stopped(dev)) {
527 int tickssofar = jiffies - dev->trans_start;
529 return NETDEV_TX_BUSY;
531 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
535 * Always set BSWP after a STOP as STOP puts it back into
536 * little endian mode.
538 REGA(CSR3) = CSR3_BSWP;
539 dev->stats.tx_errors++;
541 if(lance_debug >= 2) {
543 printk("Ring data: old_tx %d new_tx %d%s new_rx %d\n",
544 lp->old_tx, lp->new_tx,
545 lp->tx_full ? " (full)" : "",
547 for( i = 0 ; i < RX_RING_SIZE; i++ )
548 printk( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
549 i, MEM->rx_head[i].base,
550 -MEM->rx_head[i].buf_length,
551 MEM->rx_head[i].msg_length);
552 for( i = 0 ; i < TX_RING_SIZE; i++ )
553 printk("tx #%d: base=%04x len=%04x misc=%04x\n",
554 i, MEM->tx_head[i].base,
555 -MEM->tx_head[i].length,
556 MEM->tx_head[i].misc );
559 lance_init_ring(dev);
560 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
562 netif_start_queue(dev);
563 dev->trans_start = jiffies;
569 /* Block a timer-based transmit from overlapping. This could better be
570 done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
572 /* Block a timer-based transmit from overlapping with us by
573 stopping the queue for a bit... */
575 netif_stop_queue(dev);
577 if (test_and_set_bit( 0, (void*)&lp->lock ) != 0) {
578 printk( "%s: tx queue lock!.\n", dev->name);
579 /* don't clear dev->tbusy flag. */
580 return NETDEV_TX_BUSY;
584 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
588 /* this weirdness doesn't appear on sun3... */
589 if(!(DREG & CSR0_INIT)) {
590 DPRINTK( 1, ("INIT not set, reinitializing...\n"));
591 REGA( CSR0 ) = CSR0_STOP;
592 lance_init_ring(dev);
593 REGA( CSR0 ) = CSR0_INIT | CSR0_STRT;
597 /* Fill in a Tx ring entry */
599 if (lance_debug >= 2) {
600 printk( "%s: TX pkt %d type 0x%04x"
602 " data at 0x%08x len %d\n",
603 dev->name, lp->new_tx, ((u_short *)skb->data)[6],
604 DEV_ADDR(&skb->data[6]), DEV_ADDR(skb->data),
605 (int)skb->data, (int)skb->len );
608 /* We're not prepared for the int until the last flags are set/reset.
609 * And the int may happen already after setting the OWN_CHIP... */
610 local_irq_save(flags);
612 /* Mask to ring buffer boundary. */
614 head = &(MEM->tx_head[entry]);
616 /* Caution: the write order is important here, set the "ownership" bits
620 /* the sun3's lance needs it's buffer padded to the minimum
622 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
624 // head->length = -len;
625 head->length = (-len) | 0xf000;
628 skb_copy_from_linear_data(skb, PKTBUF_ADDR(head), skb->len);
630 memset(PKTBUF_ADDR(head) + skb->len, 0, len-skb->len);
632 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
633 lp->new_tx = (lp->new_tx + 1) & TX_RING_MOD_MASK;
634 dev->stats.tx_bytes += skb->len;
636 /* Trigger an immediate send poll. */
637 REGA(CSR0) = CSR0_INEA | CSR0_TDMD | CSR0_STRT;
639 DPRINTK( 2, ( "%s: lance_start_xmit() exiting, csr0 %4.4x.\n",
641 dev->trans_start = jiffies;
642 dev_kfree_skb( skb );
645 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
647 netif_start_queue(dev);
649 local_irq_restore(flags);
654 /* The LANCE interrupt handler. */
656 static irqreturn_t lance_interrupt( int irq, void *dev_id)
658 struct net_device *dev = dev_id;
659 struct lance_private *lp = netdev_priv(dev);
661 static int in_interrupt;
664 DPRINTK( 1, ( "lance_interrupt(): invalid dev_id\n" ));
669 DPRINTK( 2, ( "%s: Re-entering the interrupt handler.\n", dev->name ));
679 DREG = csr0 & (CSR0_TINT | CSR0_RINT | CSR0_IDON);
683 DREG = CSR0_BABL | CSR0_MERR | CSR0_CERR | CSR0_MISS;
686 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
687 dev->name, csr0, DREG ));
689 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
690 int old_tx = lp->old_tx;
692 // if(lance_debug >= 3) {
695 // printk("%s: tx int\n", dev->name);
697 // for(i = 0; i < TX_RING_SIZE; i++)
698 // printk("ring %d flag=%04x\n", i,
699 // MEM->tx_head[i].flag);
702 while( old_tx != lp->new_tx) {
703 struct lance_tx_head *head = &(MEM->tx_head[old_tx]);
705 DPRINTK(3, ("on tx_ring %d\n", old_tx));
707 if (head->flag & TMD1_OWN_CHIP)
708 break; /* It still hasn't been Txed */
710 if (head->flag & TMD1_ERR) {
711 int status = head->misc;
712 dev->stats.tx_errors++;
713 if (status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
714 if (status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
715 if (status & TMD3_LCOL) dev->stats.tx_window_errors++;
716 if (status & (TMD3_UFLO | TMD3_BUFF)) {
717 dev->stats.tx_fifo_errors++;
718 printk("%s: Tx FIFO error\n",
720 REGA(CSR0) = CSR0_STOP;
721 REGA(CSR3) = CSR3_BSWP;
722 lance_init_ring(dev);
723 REGA(CSR0) = CSR0_STRT | CSR0_INEA;
726 } else if(head->flag & (TMD1_ENP | TMD1_STP)) {
728 head->flag &= ~(TMD1_ENP | TMD1_STP);
729 if(head->flag & (TMD1_ONE | TMD1_MORE))
730 dev->stats.collisions++;
732 dev->stats.tx_packets++;
733 DPRINTK(3, ("cleared tx ring %d\n", old_tx));
735 old_tx = (old_tx +1) & TX_RING_MOD_MASK;
742 if (netif_queue_stopped(dev)) {
743 /* The ring is no longer full, clear tbusy. */
744 netif_start_queue(dev);
745 netif_wake_queue(dev);
748 if (csr0 & CSR0_RINT) /* Rx interrupt */
751 /* Log misc errors. */
752 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
753 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
754 if (csr0 & CSR0_MERR) {
755 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
756 "status %04x.\n", dev->name, csr0 ));
757 /* Restart the chip. */
758 REGA(CSR0) = CSR0_STOP;
759 REGA(CSR3) = CSR3_BSWP;
760 lance_init_ring(dev);
761 REGA(CSR0) = CSR0_STRT | CSR0_INEA;
765 /* Clear any other interrupt, and set interrupt enable. */
766 // DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
767 // CSR0_IDON | CSR0_INEA;
769 REGA(CSR0) = CSR0_INEA;
771 if(DREG & (CSR0_RINT | CSR0_TINT)) {
772 DPRINTK(2, ("restarting interrupt, csr0=%#04x\n", DREG));
776 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
782 /* get packet, toss into skbuff */
783 static int lance_rx( struct net_device *dev )
785 struct lance_private *lp = netdev_priv(dev);
786 int entry = lp->new_rx;
788 /* If we own the next entry, it's a new packet. Send it up. */
789 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
790 struct lance_rx_head *head = &(MEM->rx_head[entry]);
791 int status = head->flag;
793 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
794 /* There is a tricky error noted by John Murphy,
795 <murf@perftech.com> to Russ Nelson: Even with
796 full-sized buffers it's possible for a jabber packet to use two
797 buffers, with only the last correctly noting the error. */
798 if (status & RMD1_ENP) /* Only count a general error at the */
799 dev->stats.rx_errors++; /* end of a packet.*/
800 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
801 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
802 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
803 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
804 head->flag &= (RMD1_ENP|RMD1_STP);
806 /* Malloc up new buffer, compatible with net-3. */
807 // short pkt_len = head->msg_length;// & 0xfff;
808 short pkt_len = (head->msg_length & 0xfff) - 4;
812 printk( "%s: Runt packet!\n", dev->name );
813 dev->stats.rx_errors++;
816 skb = dev_alloc_skb( pkt_len+2 );
818 DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
821 dev->stats.rx_dropped++;
822 head->msg_length = 0;
823 head->flag |= RMD1_OWN_CHIP;
824 lp->new_rx = (lp->new_rx+1) &
829 if (lance_debug >= 3) {
830 u_char *data = PKTBUF_ADDR(head);
831 printk("%s: RX pkt %d type 0x%04x"
833 dev->name, lp->new_tx, ((u_short *)data)[6],
836 printk(" data %02x %02x %02x %02x %02x %02x %02x %02x "
838 data[15], data[16], data[17], data[18],
839 data[19], data[20], data[21], data[22],
843 if (lance_debug >= 3) {
844 u_char *data = PKTBUF_ADDR(head);
845 printk( "%s: RX pkt %d type 0x%04x len %d\n ", dev->name, entry, ((u_short *)data)[6], pkt_len);
849 skb_reserve( skb, 2 ); /* 16 byte align */
850 skb_put( skb, pkt_len ); /* Make room */
851 skb_copy_to_linear_data(skb,
855 skb->protocol = eth_type_trans( skb, dev );
857 dev->stats.rx_packets++;
858 dev->stats.rx_bytes += pkt_len;
862 // head->buf_length = -PKT_BUF_SZ | 0xf000;
863 head->msg_length = 0;
864 head->flag = RMD1_OWN_CHIP;
866 entry = lp->new_rx = (lp->new_rx +1) & RX_RING_MOD_MASK;
869 /* From lance.c (Donald Becker): */
870 /* We should check that at least two ring entries are free.
871 If not, we should free one and mark stats->rx_dropped++. */
877 static int lance_close( struct net_device *dev )
879 struct lance_private *lp = netdev_priv(dev);
881 netif_stop_queue(dev);
885 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
888 /* We stop the LANCE here -- it occasionally polls
889 memory if we don't. */
895 /* Set or clear the multicast filter for this adaptor.
896 num_addrs == -1 Promiscuous mode, receive all packets
897 num_addrs == 0 Normal mode, clear multicast list
898 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
899 best-effort filtering.
902 /* completely untested on a sun3 */
903 static void set_multicast_list( struct net_device *dev )
905 struct lance_private *lp = netdev_priv(dev);
907 if(netif_queue_stopped(dev))
908 /* Only possible if board is already started */
911 /* We take the simple way out and always enable promiscuous mode. */
912 DREG = CSR0_STOP; /* Temporarily stop the lance. */
914 if (dev->flags & IFF_PROMISC) {
915 /* Log any net taps. */
916 DPRINTK( 3, ( "%s: Promiscuous mode enabled.\n", dev->name ));
917 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
919 short multicast_table[4];
920 int num_addrs = dev->mc_count;
922 /* We don't use the multicast table, but rely on upper-layer
924 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
925 sizeof(multicast_table) );
926 for( i = 0; i < 4; i++ )
927 REGA( CSR8+i ) = multicast_table[i];
928 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
932 * Always set BSWP after a STOP as STOP puts it back into
933 * little endian mode.
935 REGA( CSR3 ) = CSR3_BSWP;
937 /* Resume normal operation and reset AREG to CSR0 */
938 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
944 static struct net_device *sun3lance_dev;
946 int __init init_module(void)
948 sun3lance_dev = sun3lance_probe(-1);
949 if (IS_ERR(sun3lance_dev))
950 return PTR_ERR(sun3lance_dev);
954 void __exit cleanup_module(void)
956 unregister_netdev(sun3lance_dev);
958 iounmap((void __iomem *)sun3lance_dev->base_addr);
960 free_netdev(sun3lance_dev);