1 /* atarilance.c: Ethernet driver for VME Lance cards on the Atari */
3 Written 1995/96 by Roman Hodek (Roman.Hodek@informatik.uni-erlangen.de)
5 This software may be used and distributed according to the terms
6 of the GNU General Public License, incorporated herein by reference.
8 This drivers was written with the following sources of reference:
9 - The driver for the Riebl Lance card by the TU Vienna.
10 - The modified TUW driver for PAM's VME cards
11 - The PC-Linux driver for Lance cards (but this is for bus master
12 cards, not the shared memory ones)
13 - The Amiga Ariadne driver
15 v1.0: (in 1.2.13pl4/0.9.13)
19 deleted some debugging stuff
20 optimized register access (keep AREG pointing to CSR0)
21 following AMD, CSR0_STRT should be set only after IDON is detected
22 use memcpy() for data transfers, that also employs long word moves
23 better probe procedure for 24-bit systems
24 non-VME-RieblCards need extra delays in memcpy
25 must also do write test, since 0xfxe00000 may hit ROM
26 use 8/32 tx/rx buffers, which should give better NFS performance;
27 this is made possible by shifting the last packet buffer after the
28 RieblCard reserved area
30 again fixed probing for the Falcon; 0xfe01000 hits phys. 0x00010000
31 and thus RAM, in case of no Lance found all memory contents have to
33 Now possible to compile as module.
34 v1.3: 03/30/96 Jes Sorensen, Roman (in 1.3)
35 Several little 1.3 adaptions
36 When the lance is stopped it jumps back into little-endian
37 mode. It is therefore necessary to put it back where it
38 belongs, in big endian mode, in order to make things work.
39 This might be the reason why multicast-mode didn't work
40 before, but I'm not able to test it as I only got an Amiga
41 (we had similar problems with the A2065 driver).
45 static const char version[] = "atarilance.c: v1.3 04/04/96 "
46 "Roman.Hodek@informatik.uni-erlangen.de\n";
48 #include <linux/netdevice.h>
49 #include <linux/etherdevice.h>
50 #include <linux/module.h>
51 #include <linux/stddef.h>
52 #include <linux/kernel.h>
53 #include <linux/string.h>
54 #include <linux/errno.h>
55 #include <linux/skbuff.h>
56 #include <linux/interrupt.h>
57 #include <linux/init.h>
58 #include <linux/bitops.h>
60 #include <asm/setup.h>
62 #include <asm/atarihw.h>
63 #include <asm/atariints.h>
67 * 0 = silent, print only serious errors
68 * 1 = normal, print error messages
69 * 2 = debug, print debug infos
70 * 3 = debug, print even more debug infos (packet data)
76 static int lance_debug = LANCE_DEBUG;
78 static int lance_debug = 1;
80 module_param(lance_debug, int, 0);
81 MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
82 MODULE_LICENSE("GPL");
84 /* Print debug messages on probing? */
85 #undef LANCE_DEBUG_PROBE
87 #define DPRINTK(n,a) \
89 if (lance_debug >= n) \
93 #ifdef LANCE_DEBUG_PROBE
94 # define PROBE_PRINT(a) printk a
96 # define PROBE_PRINT(a)
99 /* These define the number of Rx and Tx buffers as log2. (Only powers
101 * Much more rx buffers (32) are reserved than tx buffers (8), since receiving
102 * is more time critical then sending and packets may have to remain in the
103 * board's memory when main memory is low.
106 #define TX_LOG_RING_SIZE 3
107 #define RX_LOG_RING_SIZE 5
109 /* These are the derived values */
111 #define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
112 #define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
113 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
115 #define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
116 #define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
117 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
119 #define TX_TIMEOUT (HZ/5)
121 /* The LANCE Rx and Tx ring descriptors. */
122 struct lance_rx_head {
123 unsigned short base; /* Low word of base addr */
124 volatile unsigned char flag;
125 unsigned char base_hi; /* High word of base addr (unused) */
126 short buf_length; /* This length is 2s complement! */
127 volatile short msg_length; /* This length is "normal". */
130 struct lance_tx_head {
131 unsigned short base; /* Low word of base addr */
132 volatile unsigned char flag;
133 unsigned char base_hi; /* High word of base addr (unused) */
134 short length; /* Length is 2s complement! */
139 unsigned short adr_lo; /* Low 16 bits of address */
140 unsigned char len; /* Length bits */
141 unsigned char adr_hi; /* High 8 bits of address (unused) */
144 /* The LANCE initialization block, described in databook. */
145 struct lance_init_block {
146 unsigned short mode; /* Pre-set mode */
147 unsigned char hwaddr[6]; /* Physical ethernet address */
148 unsigned filter[2]; /* Multicast filter (unused). */
149 /* Receive and transmit ring base, along with length bits. */
150 struct ringdesc rx_ring;
151 struct ringdesc tx_ring;
154 /* The whole layout of the Lance shared memory */
155 struct lance_memory {
156 struct lance_init_block init;
157 struct lance_tx_head tx_head[TX_RING_SIZE];
158 struct lance_rx_head rx_head[RX_RING_SIZE];
159 char packet_area[]; /* packet data follow after the
160 * init block and the ring
161 * descriptors and are located
165 /* RieblCard specifics:
166 * The original TOS driver for these cards reserves the area from offset
167 * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
168 * Ethernet address there, and the magic for verifying the data's validity.
169 * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
170 * is reserved for the interrupt vector number.
172 #define RIEBL_RSVD_START 0xee70
173 #define RIEBL_RSVD_END 0xeec0
174 #define RIEBL_MAGIC 0x09051990
175 #define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
176 #define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
177 #define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
179 /* This is a default address for the old RieblCards without a battery
180 * that have no ethernet address at boot time. 00:00:36:04 is the
181 * prefix for Riebl cards, the 00:00 at the end is arbitrary.
184 static unsigned char OldRieblDefHwaddr[6] = {
185 0x00, 0x00, 0x36, 0x04, 0x00, 0x00
189 /* I/O registers of the Lance chip */
192 /* base+0x0 */ volatile unsigned short data;
193 /* base+0x2 */ volatile unsigned short addr;
194 unsigned char _dummy1[3];
195 /* base+0x7 */ volatile unsigned char ivec;
196 unsigned char _dummy2[5];
197 /* base+0xd */ volatile unsigned char eeprom;
198 unsigned char _dummy3;
199 /* base+0xf */ volatile unsigned char mem;
202 /* Types of boards this driver supports */
205 OLD_RIEBL, /* old Riebl card without battery */
206 NEW_RIEBL, /* new Riebl card with battery */
207 PAM_CARD /* PAM card with EEPROM */
210 static char *lance_names[] = {
211 "Riebl-Card (without battery)",
212 "Riebl-Card (with battery)",
216 /* The driver's private device structure */
218 struct lance_private {
219 enum lance_type cardtype;
220 struct lance_ioreg *iobase;
221 struct lance_memory *mem;
222 int cur_rx, cur_tx; /* The next free ring entry */
223 int dirty_tx; /* Ring entries to be freed. */
225 void *(*memcpy_f)( void *, const void *, size_t );
226 /* This must be long for set_bit() */
231 /* I/O register access macros */
234 #define DREG IO->data
235 #define AREG IO->addr
236 #define REGA(a) (*( AREG = (a), &DREG ))
238 /* Definitions for packet buffer access: */
239 #define PKT_BUF_SZ 1544
240 /* Get the address of a packet buffer corresponding to a given buffer head */
241 #define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base)
243 /* Possible memory/IO addresses for probing */
245 static struct lance_addr {
246 unsigned long memaddr;
247 unsigned long ioaddr;
249 } lance_addr_list[] = {
250 { 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */
251 { 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE
252 (highest byte stripped) */
253 { 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST
254 (highest byte stripped) */
255 { 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to
256 avoid conflict with ROM
257 (highest byte stripped) */
258 { 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE
259 (highest byte stripped) */
260 { 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE
261 (highest byte stripped) */
264 #define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list)
267 /* Definitions for the Lance */
270 #define TMD1_ENP 0x01 /* end of packet */
271 #define TMD1_STP 0x02 /* start of packet */
272 #define TMD1_DEF 0x04 /* deferred */
273 #define TMD1_ONE 0x08 /* one retry needed */
274 #define TMD1_MORE 0x10 /* more than one retry needed */
275 #define TMD1_ERR 0x40 /* error summary */
276 #define TMD1_OWN 0x80 /* ownership (set: chip owns) */
278 #define TMD1_OWN_CHIP TMD1_OWN
279 #define TMD1_OWN_HOST 0
281 /* tx_head misc field */
282 #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
283 #define TMD3_RTRY 0x0400 /* failed after 16 retries */
284 #define TMD3_LCAR 0x0800 /* carrier lost */
285 #define TMD3_LCOL 0x1000 /* late collision */
286 #define TMD3_UFLO 0x4000 /* underflow (late memory) */
287 #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
290 #define RMD1_ENP 0x01 /* end of packet */
291 #define RMD1_STP 0x02 /* start of packet */
292 #define RMD1_BUFF 0x04 /* buffer error */
293 #define RMD1_CRC 0x08 /* CRC error */
294 #define RMD1_OFLO 0x10 /* overflow */
295 #define RMD1_FRAM 0x20 /* framing error */
296 #define RMD1_ERR 0x40 /* error summary */
297 #define RMD1_OWN 0x80 /* ownership (set: ship owns) */
299 #define RMD1_OWN_CHIP RMD1_OWN
300 #define RMD1_OWN_HOST 0
303 #define CSR0 0 /* mode/status */
304 #define CSR1 1 /* init block addr (low) */
305 #define CSR2 2 /* init block addr (high) */
306 #define CSR3 3 /* misc */
307 #define CSR8 8 /* address filter */
308 #define CSR15 15 /* promiscuous mode */
311 /* (R=readable, W=writeable, S=set on write, C=clear on write) */
312 #define CSR0_INIT 0x0001 /* initialize (RS) */
313 #define CSR0_STRT 0x0002 /* start (RS) */
314 #define CSR0_STOP 0x0004 /* stop (RS) */
315 #define CSR0_TDMD 0x0008 /* transmit demand (RS) */
316 #define CSR0_TXON 0x0010 /* transmitter on (R) */
317 #define CSR0_RXON 0x0020 /* receiver on (R) */
318 #define CSR0_INEA 0x0040 /* interrupt enable (RW) */
319 #define CSR0_INTR 0x0080 /* interrupt active (R) */
320 #define CSR0_IDON 0x0100 /* initialization done (RC) */
321 #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
322 #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
323 #define CSR0_MERR 0x0800 /* memory error (RC) */
324 #define CSR0_MISS 0x1000 /* missed frame (RC) */
325 #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
326 #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
327 #define CSR0_ERR 0x8000 /* error (RC) */
330 #define CSR3_BCON 0x0001 /* byte control */
331 #define CSR3_ACON 0x0002 /* ALE control */
332 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
336 /***************************** Prototypes *****************************/
338 static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
340 static int lance_open( struct net_device *dev );
341 static void lance_init_ring( struct net_device *dev );
342 static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
343 struct net_device *dev);
344 static irqreturn_t lance_interrupt( int irq, void *dev_id );
345 static int lance_rx( struct net_device *dev );
346 static int lance_close( struct net_device *dev );
347 static void set_multicast_list( struct net_device *dev );
348 static int lance_set_mac_address( struct net_device *dev, void *addr );
349 static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue);
351 /************************* End of Prototypes **************************/
357 static void *slow_memcpy( void *dst, const void *src, size_t len )
360 const char *cfrom = src;
370 struct net_device * __init atarilance_probe(void)
374 struct net_device *dev;
377 if (!MACH_IS_ATARI || found)
378 /* Assume there's only one board possible... That seems true, since
379 * the Riebl/PAM board's address cannot be changed. */
380 return ERR_PTR(-ENODEV);
382 dev = alloc_etherdev(sizeof(struct lance_private));
384 return ERR_PTR(-ENOMEM);
386 for( i = 0; i < N_LANCE_ADDR; ++i ) {
387 if (lance_probe1( dev, &lance_addr_list[i] )) {
389 err = register_netdev(dev);
392 free_irq(dev->irq, dev);
401 /* Derived from hwreg_present() in atari/config.c: */
403 static noinline int __init addr_accessible(volatile void *regp, int wordflag,
408 long *vbr, save_berr;
410 local_irq_save(flags);
412 __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
416 ( "movel %/sp,%/d1\n\t"
417 "movel #Lberr,%2@\n\t"
424 "1: movew %1@,%/d0\n\t"
440 "Lberr: movel %/d1,%/sp"
442 : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
443 : "d0", "d1", "memory"
447 local_irq_restore(flags);
452 static const struct net_device_ops lance_netdev_ops = {
453 .ndo_open = lance_open,
454 .ndo_stop = lance_close,
455 .ndo_start_xmit = lance_start_xmit,
456 .ndo_set_rx_mode = set_multicast_list,
457 .ndo_set_mac_address = lance_set_mac_address,
458 .ndo_tx_timeout = lance_tx_timeout,
459 .ndo_validate_addr = eth_validate_addr,
462 static unsigned long __init lance_probe1( struct net_device *dev,
463 struct lance_addr *init_rec )
465 volatile unsigned short *memaddr =
466 (volatile unsigned short *)init_rec->memaddr;
467 volatile unsigned short *ioaddr =
468 (volatile unsigned short *)init_rec->ioaddr;
469 struct lance_private *lp;
470 struct lance_ioreg *IO;
472 static int did_version;
473 unsigned short save1, save2;
476 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
477 (long)memaddr, (long)ioaddr ));
479 /* Test whether memory readable and writable */
480 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
481 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
483 /* Written values should come back... */
484 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
487 if (*memaddr != 0x0001) goto probe_fail;
488 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
490 if (*memaddr != 0x0000) goto probe_fail;
493 /* First port should be readable and writable */
494 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
495 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
497 /* and written values should be readable */
498 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
501 if (ioaddr[1] != 0x0001) goto probe_fail;
503 /* The CSR0_INIT bit should not be readable */
504 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
507 ioaddr[0] = CSR0_INIT | CSR0_STOP;
508 if (ioaddr[0] != CSR0_STOP) {
513 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
514 ioaddr[0] = CSR0_STOP;
515 if (ioaddr[0] != CSR0_STOP) {
522 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
529 lp = netdev_priv(dev);
530 MEM = (struct lance_memory *)memaddr;
531 IO = lp->iobase = (struct lance_ioreg *)ioaddr;
532 dev->base_addr = (unsigned long)ioaddr; /* informational only */
533 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
535 REGA( CSR0 ) = CSR0_STOP;
537 /* Now test for type: If the eeprom I/O port is readable, it is a
539 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
540 /* Switch back to Ram */
542 lp->cardtype = PAM_CARD;
544 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
545 lp->cardtype = NEW_RIEBL;
548 lp->cardtype = OLD_RIEBL;
550 if (lp->cardtype == PAM_CARD ||
551 memaddr == (unsigned short *)0xffe00000) {
552 /* PAMs card and Riebl on ST use level 5 autovector */
553 if (request_irq(IRQ_AUTO_5, lance_interrupt, 0,
554 "PAM,Riebl-ST Ethernet", dev)) {
555 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
558 dev->irq = IRQ_AUTO_5;
561 /* For VME-RieblCards, request a free VME int */
562 unsigned int irq = atari_register_vme_int();
564 printk( "Lance: request for VME interrupt failed\n" );
567 if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet",
569 printk( "Lance: request for irq %u failed\n", irq );
575 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
576 dev->name, lance_names[lp->cardtype],
577 (unsigned long)ioaddr,
578 (unsigned long)memaddr,
580 init_rec->slow_flag ? " (slow memcpy)" : "" );
582 /* Get the ethernet address */
583 switch( lp->cardtype ) {
585 /* No ethernet address! (Set some default address) */
586 eth_hw_addr_set(dev, OldRieblDefHwaddr);
589 lp->memcpy_f(addr, RIEBL_HWADDR_ADDR, ETH_ALEN);
590 eth_hw_addr_set(dev, addr);
594 for( i = 0; i < 6; ++i )
596 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
597 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
598 eth_hw_addr_set(dev, addr);
602 printk("%pM\n", dev->dev_addr);
603 if (lp->cardtype == OLD_RIEBL) {
604 printk( "%s: Warning: This is a default ethernet address!\n",
606 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
609 spin_lock_init(&lp->devlock);
611 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
612 for( i = 0; i < 6; i++ )
613 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
614 MEM->init.filter[0] = 0x00000000;
615 MEM->init.filter[1] = 0x00000000;
616 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
617 MEM->init.rx_ring.adr_hi = 0;
618 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
619 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
620 MEM->init.tx_ring.adr_hi = 0;
621 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
623 if (lp->cardtype == PAM_CARD)
624 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
626 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
628 if (did_version++ == 0)
629 DPRINTK( 1, ( version ));
631 dev->netdev_ops = &lance_netdev_ops;
634 dev->watchdog_timeo = TX_TIMEOUT;
640 static int lance_open( struct net_device *dev )
642 struct lance_private *lp = netdev_priv(dev);
643 struct lance_ioreg *IO = lp->iobase;
646 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
648 lance_init_ring(dev);
649 /* Re-initialize the LANCE, and start it when done. */
651 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
654 REGA( CSR0 ) = CSR0_INIT;
655 /* From now on, AREG is kept to point to CSR0 */
659 if (DREG & CSR0_IDON)
661 if (i <= 0 || (DREG & CSR0_ERR)) {
662 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
663 dev->name, i, DREG ));
671 netif_start_queue (dev);
673 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
679 /* Initialize the LANCE Rx and Tx rings. */
681 static void lance_init_ring( struct net_device *dev )
683 struct lance_private *lp = netdev_priv(dev);
688 lp->cur_rx = lp->cur_tx = 0;
691 offset = offsetof( struct lance_memory, packet_area );
693 /* If the packet buffer at offset 'o' would conflict with the reserved area
694 * of RieblCards, advance it */
695 #define CHECK_OFFSET(o) \
697 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
698 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
699 : (o) < RIEBL_RSVD_END) \
700 (o) = RIEBL_RSVD_END; \
704 for( i = 0; i < TX_RING_SIZE; i++ ) {
705 CHECK_OFFSET(offset);
706 MEM->tx_head[i].base = offset;
707 MEM->tx_head[i].flag = TMD1_OWN_HOST;
708 MEM->tx_head[i].base_hi = 0;
709 MEM->tx_head[i].length = 0;
710 MEM->tx_head[i].misc = 0;
711 offset += PKT_BUF_SZ;
714 for( i = 0; i < RX_RING_SIZE; i++ ) {
715 CHECK_OFFSET(offset);
716 MEM->rx_head[i].base = offset;
717 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
718 MEM->rx_head[i].base_hi = 0;
719 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
720 MEM->rx_head[i].msg_length = 0;
721 offset += PKT_BUF_SZ;
726 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
729 static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue)
731 struct lance_private *lp = netdev_priv(dev);
732 struct lance_ioreg *IO = lp->iobase;
735 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
739 * Always set BSWP after a STOP as STOP puts it back into
740 * little endian mode.
742 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
743 dev->stats.tx_errors++;
744 #ifndef final_version
746 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
747 lp->dirty_tx, lp->cur_tx,
748 lp->tx_full ? " (full)" : "",
750 for( i = 0 ; i < RX_RING_SIZE; i++ )
751 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
752 i, MEM->rx_head[i].base,
753 -MEM->rx_head[i].buf_length,
754 MEM->rx_head[i].msg_length ));
755 for( i = 0 ; i < TX_RING_SIZE; i++ )
756 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
757 i, MEM->tx_head[i].base,
758 -MEM->tx_head[i].length,
759 MEM->tx_head[i].misc ));
762 /* XXX MSch: maybe purge/reinit ring here */
763 /* lance_restart, essentially */
764 lance_init_ring(dev);
765 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
766 netif_trans_update(dev); /* prevent tx timeout */
767 netif_wake_queue(dev);
770 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
773 lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
775 struct lance_private *lp = netdev_priv(dev);
776 struct lance_ioreg *IO = lp->iobase;
778 struct lance_tx_head *head;
781 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
785 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
789 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
790 else if (lp->cardtype == PAM_CARD && (len & 1))
793 if (len > skb->len) {
794 if (skb_padto(skb, len))
798 netif_stop_queue (dev);
800 /* Fill in a Tx ring entry */
801 if (lance_debug >= 3) {
802 printk( "%s: TX pkt type 0x%04x from %pM to %pM"
803 " data at 0x%08x len %d\n",
804 dev->name, ((u_short *)skb->data)[6],
805 &skb->data[6], skb->data,
806 (int)skb->data, (int)skb->len );
809 /* We're not prepared for the int until the last flags are set/reset. And
810 * the int may happen already after setting the OWN_CHIP... */
811 spin_lock_irqsave (&lp->devlock, flags);
813 /* Mask to ring buffer boundary. */
814 entry = lp->cur_tx & TX_RING_MOD_MASK;
815 head = &(MEM->tx_head[entry]);
817 /* Caution: the write order is important here, set the "ownership" bits
824 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
825 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
826 dev->stats.tx_bytes += skb->len;
827 dev_kfree_skb( skb );
829 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
830 lp->cur_tx -= TX_RING_SIZE;
831 lp->dirty_tx -= TX_RING_SIZE;
834 /* Trigger an immediate send poll. */
835 DREG = CSR0_INEA | CSR0_TDMD;
837 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
839 netif_start_queue (dev);
842 spin_unlock_irqrestore (&lp->devlock, flags);
847 /* The LANCE interrupt handler. */
849 static irqreturn_t lance_interrupt( int irq, void *dev_id )
851 struct net_device *dev = dev_id;
852 struct lance_private *lp;
853 struct lance_ioreg *IO;
854 int csr0, boguscnt = 10;
858 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
862 lp = netdev_priv(dev);
864 spin_lock (&lp->devlock);
868 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
871 /* Acknowledge all of the current interrupt sources ASAP. */
872 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
873 CSR0_TDMD | CSR0_INEA);
875 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
876 dev->name, csr0, DREG ));
878 if (csr0 & CSR0_RINT) /* Rx interrupt */
881 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
882 int dirty_tx = lp->dirty_tx;
884 while( dirty_tx < lp->cur_tx) {
885 int entry = dirty_tx & TX_RING_MOD_MASK;
886 int status = MEM->tx_head[entry].flag;
888 if (status & TMD1_OWN_CHIP)
889 break; /* It still hasn't been Txed */
891 MEM->tx_head[entry].flag = 0;
893 if (status & TMD1_ERR) {
894 /* There was an major error, log it. */
895 int err_status = MEM->tx_head[entry].misc;
896 dev->stats.tx_errors++;
897 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
898 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
899 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
900 if (err_status & TMD3_UFLO) {
901 /* Ackk! On FIFO errors the Tx unit is turned off! */
902 dev->stats.tx_fifo_errors++;
903 /* Remove this verbosity later! */
904 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
906 /* Restart the chip. */
910 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
911 dev->stats.collisions++;
912 dev->stats.tx_packets++;
915 /* XXX MSch: free skb?? */
919 #ifndef final_version
920 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
921 DPRINTK( 0, ( "out-of-sync dirty pointer,"
922 " %d vs. %d, full=%ld.\n",
923 dirty_tx, lp->cur_tx, lp->tx_full ));
924 dirty_tx += TX_RING_SIZE;
928 if (lp->tx_full && (netif_queue_stopped(dev)) &&
929 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
930 /* The ring is no longer full, clear tbusy. */
932 netif_wake_queue (dev);
935 lp->dirty_tx = dirty_tx;
938 /* Log misc errors. */
939 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
940 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
941 if (csr0 & CSR0_MERR) {
942 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
943 "status %04x.\n", dev->name, csr0 ));
944 /* Restart the chip. */
949 /* Clear any other interrupt, and set interrupt enable. */
950 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
951 CSR0_IDON | CSR0_INEA;
953 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
956 spin_unlock (&lp->devlock);
957 return IRQ_RETVAL(handled);
961 static int lance_rx( struct net_device *dev )
963 struct lance_private *lp = netdev_priv(dev);
964 int entry = lp->cur_rx & RX_RING_MOD_MASK;
967 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
968 MEM->rx_head[entry].flag ));
970 /* If we own the next entry, it's a new packet. Send it up. */
971 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
972 struct lance_rx_head *head = &(MEM->rx_head[entry]);
973 int status = head->flag;
975 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
976 /* There is a tricky error noted by John Murphy,
977 <murf@perftech.com> to Russ Nelson: Even with full-sized
978 buffers it's possible for a jabber packet to use two
979 buffers, with only the last correctly noting the error. */
980 if (status & RMD1_ENP) /* Only count a general error at the */
981 dev->stats.rx_errors++; /* end of a packet.*/
982 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
983 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
984 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
985 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
986 head->flag &= (RMD1_ENP|RMD1_STP);
988 /* Malloc up new buffer, compatible with net-3. */
989 short pkt_len = head->msg_length & 0xfff;
993 printk( "%s: Runt packet!\n", dev->name );
994 dev->stats.rx_errors++;
997 skb = netdev_alloc_skb(dev, pkt_len + 2);
999 for( i = 0; i < RX_RING_SIZE; i++ )
1000 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1004 if (i > RX_RING_SIZE - 2) {
1005 dev->stats.rx_dropped++;
1006 head->flag |= RMD1_OWN_CHIP;
1012 if (lance_debug >= 3) {
1013 u_char *data = PKTBUF_ADDR(head);
1015 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
1016 "data %8ph len %d\n",
1017 dev->name, ((u_short *)data)[6],
1018 &data[6], data, &data[15], pkt_len);
1021 skb_reserve( skb, 2 ); /* 16 byte align */
1022 skb_put( skb, pkt_len ); /* Make room */
1023 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1024 skb->protocol = eth_type_trans( skb, dev );
1026 dev->stats.rx_packets++;
1027 dev->stats.rx_bytes += pkt_len;
1031 head->flag |= RMD1_OWN_CHIP;
1032 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1034 lp->cur_rx &= RX_RING_MOD_MASK;
1036 /* From lance.c (Donald Becker): */
1037 /* We should check that at least two ring entries are free. If not,
1038 we should free one and mark stats->rx_dropped++. */
1044 static int lance_close( struct net_device *dev )
1046 struct lance_private *lp = netdev_priv(dev);
1047 struct lance_ioreg *IO = lp->iobase;
1049 netif_stop_queue (dev);
1053 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1056 /* We stop the LANCE here -- it occasionally polls
1057 memory if we don't. */
1064 /* Set or clear the multicast filter for this adaptor.
1065 num_addrs == -1 Promiscuous mode, receive all packets
1066 num_addrs == 0 Normal mode, clear multicast list
1067 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1068 best-effort filtering.
1071 static void set_multicast_list( struct net_device *dev )
1073 struct lance_private *lp = netdev_priv(dev);
1074 struct lance_ioreg *IO = lp->iobase;
1076 if (netif_running(dev))
1077 /* Only possible if board is already started */
1080 /* We take the simple way out and always enable promiscuous mode. */
1081 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1083 if (dev->flags & IFF_PROMISC) {
1084 /* Log any net taps. */
1085 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1086 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1088 short multicast_table[4];
1089 int num_addrs = netdev_mc_count(dev);
1091 /* We don't use the multicast table, but rely on upper-layer
1093 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1094 sizeof(multicast_table) );
1095 for( i = 0; i < 4; i++ )
1096 REGA( CSR8+i ) = multicast_table[i];
1097 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1101 * Always set BSWP after a STOP as STOP puts it back into
1102 * little endian mode.
1104 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1106 /* Resume normal operation and reset AREG to CSR0 */
1107 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1111 /* This is needed for old RieblCards and possible for new RieblCards */
1113 static int lance_set_mac_address( struct net_device *dev, void *addr )
1115 struct lance_private *lp = netdev_priv(dev);
1116 struct sockaddr *saddr = addr;
1119 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1122 if (netif_running(dev)) {
1123 /* Only possible while card isn't started */
1124 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1129 eth_hw_addr_set(dev, saddr->sa_data);
1130 for( i = 0; i < 6; i++ )
1131 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1132 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1133 /* set also the magic for future sessions */
1134 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1139 static struct net_device *atarilance_dev;
1141 static int __init atarilance_module_init(void)
1143 atarilance_dev = atarilance_probe();
1144 return PTR_ERR_OR_ZERO(atarilance_dev);
1147 static void __exit atarilance_module_exit(void)
1149 unregister_netdev(atarilance_dev);
1150 free_irq(atarilance_dev->irq, atarilance_dev);
1151 free_netdev(atarilance_dev);
1153 module_init(atarilance_module_init);
1154 module_exit(atarilance_module_exit);