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 char version[] = "atarilance.c: v1.3 04/04/96 "
46 "Roman.Hodek@informatik.uni-erlangen.de\n";
48 #include <linux/module.h>
50 #include <linux/stddef.h>
51 #include <linux/kernel.h>
52 #include <linux/sched.h>
53 #include <linux/string.h>
54 #include <linux/ptrace.h>
55 #include <linux/errno.h>
56 #include <linux/slab.h>
57 #include <linux/interrupt.h>
58 #include <linux/init.h>
60 #include <asm/setup.h>
62 #include <asm/atarihw.h>
63 #include <asm/atariints.h>
64 #include <asm/bitops.h>
67 #include <linux/netdevice.h>
68 #include <linux/etherdevice.h>
69 #include <linux/skbuff.h>
72 * 0 = silent, print only serious errors
73 * 1 = normal, print error messages
74 * 2 = debug, print debug infos
75 * 3 = debug, print even more debug infos (packet data)
81 static int lance_debug = LANCE_DEBUG;
83 static int lance_debug = 1;
85 MODULE_PARM(lance_debug, "i");
86 MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)");
87 MODULE_LICENSE("GPL");
89 /* Print debug messages on probing? */
90 #undef LANCE_DEBUG_PROBE
92 #define DPRINTK(n,a) \
94 if (lance_debug >= n) \
98 #ifdef LANCE_DEBUG_PROBE
99 # define PROBE_PRINT(a) printk a
101 # define PROBE_PRINT(a)
104 /* These define the number of Rx and Tx buffers as log2. (Only powers
106 * Much more rx buffers (32) are reserved than tx buffers (8), since receiving
107 * is more time critical then sending and packets may have to remain in the
108 * board's memory when main memory is low.
111 #define TX_LOG_RING_SIZE 3
112 #define RX_LOG_RING_SIZE 5
114 /* These are the derived values */
116 #define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
117 #define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
118 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
120 #define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
121 #define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
122 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
124 #define TX_TIMEOUT 20
126 /* The LANCE Rx and Tx ring descriptors. */
127 struct lance_rx_head {
128 unsigned short base; /* Low word of base addr */
129 volatile unsigned char flag;
130 unsigned char base_hi; /* High word of base addr (unused) */
131 short buf_length; /* This length is 2s complement! */
132 volatile short msg_length; /* This length is "normal". */
135 struct lance_tx_head {
136 unsigned short base; /* Low word of base addr */
137 volatile unsigned char flag;
138 unsigned char base_hi; /* High word of base addr (unused) */
139 short length; /* Length is 2s complement! */
144 unsigned short adr_lo; /* Low 16 bits of address */
145 unsigned char len; /* Length bits */
146 unsigned char adr_hi; /* High 8 bits of address (unused) */
149 /* The LANCE initialization block, described in databook. */
150 struct lance_init_block {
151 unsigned short mode; /* Pre-set mode */
152 unsigned char hwaddr[6]; /* Physical ethernet address */
153 unsigned filter[2]; /* Multicast filter (unused). */
154 /* Receive and transmit ring base, along with length bits. */
155 struct ringdesc rx_ring;
156 struct ringdesc tx_ring;
159 /* The whole layout of the Lance shared memory */
160 struct lance_memory {
161 struct lance_init_block init;
162 struct lance_tx_head tx_head[TX_RING_SIZE];
163 struct lance_rx_head rx_head[RX_RING_SIZE];
164 char packet_area[0]; /* packet data follow after the
165 * init block and the ring
166 * descriptors and are located
170 /* RieblCard specifics:
171 * The original TOS driver for these cards reserves the area from offset
172 * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
173 * Ethernet address there, and the magic for verifying the data's validity.
174 * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
175 * is reserved for the interrupt vector number.
177 #define RIEBL_RSVD_START 0xee70
178 #define RIEBL_RSVD_END 0xeec0
179 #define RIEBL_MAGIC 0x09051990
180 #define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a))
181 #define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e))
182 #define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe))
184 /* This is a default address for the old RieblCards without a battery
185 * that have no ethernet address at boot time. 00:00:36:04 is the
186 * prefix for Riebl cards, the 00:00 at the end is arbitrary.
189 static unsigned char OldRieblDefHwaddr[6] = {
190 0x00, 0x00, 0x36, 0x04, 0x00, 0x00
194 /* I/O registers of the Lance chip */
197 /* base+0x0 */ volatile unsigned short data;
198 /* base+0x2 */ volatile unsigned short addr;
199 unsigned char _dummy1[3];
200 /* base+0x7 */ volatile unsigned char ivec;
201 unsigned char _dummy2[5];
202 /* base+0xd */ volatile unsigned char eeprom;
203 unsigned char _dummy3;
204 /* base+0xf */ volatile unsigned char mem;
207 /* Types of boards this driver supports */
210 OLD_RIEBL, /* old Riebl card without battery */
211 NEW_RIEBL, /* new Riebl card with battery */
212 PAM_CARD /* PAM card with EEPROM */
215 static char *lance_names[] = {
216 "Riebl-Card (without battery)",
217 "Riebl-Card (with battery)",
221 /* The driver's private device structure */
223 struct lance_private {
224 enum lance_type cardtype;
225 struct lance_ioreg *iobase;
226 struct lance_memory *mem;
227 int cur_rx, cur_tx; /* The next free ring entry */
228 int dirty_tx; /* Ring entries to be freed. */
230 void *(*memcpy_f)( void *, const void *, size_t );
231 struct net_device_stats stats;
232 /* This must be long for set_bit() */
237 /* I/O register access macros */
240 #define DREG IO->data
241 #define AREG IO->addr
242 #define REGA(a) ( AREG = (a), DREG )
244 /* Definitions for packet buffer access: */
245 #define PKT_BUF_SZ 1544
246 /* Get the address of a packet buffer corresponding to a given buffer head */
247 #define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base)
249 /* Possible memory/IO addresses for probing */
252 unsigned long memaddr;
253 unsigned long ioaddr;
255 } lance_addr_list[] = {
256 { 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */
257 { 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE
258 (highest byte stripped) */
259 { 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST
260 (highest byte stripped) */
261 { 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to
262 avoid conflict with ROM
263 (highest byte stripped) */
264 { 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE
265 (highest byte stripped) */
266 { 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE
267 (highest byte stripped) */
270 #define N_LANCE_ADDR (sizeof(lance_addr_list)/sizeof(*lance_addr_list))
273 /* Definitions for the Lance */
276 #define TMD1_ENP 0x01 /* end of packet */
277 #define TMD1_STP 0x02 /* start of packet */
278 #define TMD1_DEF 0x04 /* deferred */
279 #define TMD1_ONE 0x08 /* one retry needed */
280 #define TMD1_MORE 0x10 /* more than one retry needed */
281 #define TMD1_ERR 0x40 /* error summary */
282 #define TMD1_OWN 0x80 /* ownership (set: chip owns) */
284 #define TMD1_OWN_CHIP TMD1_OWN
285 #define TMD1_OWN_HOST 0
287 /* tx_head misc field */
288 #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
289 #define TMD3_RTRY 0x0400 /* failed after 16 retries */
290 #define TMD3_LCAR 0x0800 /* carrier lost */
291 #define TMD3_LCOL 0x1000 /* late collision */
292 #define TMD3_UFLO 0x4000 /* underflow (late memory) */
293 #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
296 #define RMD1_ENP 0x01 /* end of packet */
297 #define RMD1_STP 0x02 /* start of packet */
298 #define RMD1_BUFF 0x04 /* buffer error */
299 #define RMD1_CRC 0x08 /* CRC error */
300 #define RMD1_OFLO 0x10 /* overflow */
301 #define RMD1_FRAM 0x20 /* framing error */
302 #define RMD1_ERR 0x40 /* error summary */
303 #define RMD1_OWN 0x80 /* ownership (set: ship owns) */
305 #define RMD1_OWN_CHIP RMD1_OWN
306 #define RMD1_OWN_HOST 0
309 #define CSR0 0 /* mode/status */
310 #define CSR1 1 /* init block addr (low) */
311 #define CSR2 2 /* init block addr (high) */
312 #define CSR3 3 /* misc */
313 #define CSR8 8 /* address filter */
314 #define CSR15 15 /* promiscuous mode */
317 /* (R=readable, W=writeable, S=set on write, C=clear on write) */
318 #define CSR0_INIT 0x0001 /* initialize (RS) */
319 #define CSR0_STRT 0x0002 /* start (RS) */
320 #define CSR0_STOP 0x0004 /* stop (RS) */
321 #define CSR0_TDMD 0x0008 /* transmit demand (RS) */
322 #define CSR0_TXON 0x0010 /* transmitter on (R) */
323 #define CSR0_RXON 0x0020 /* receiver on (R) */
324 #define CSR0_INEA 0x0040 /* interrupt enable (RW) */
325 #define CSR0_INTR 0x0080 /* interrupt active (R) */
326 #define CSR0_IDON 0x0100 /* initialization done (RC) */
327 #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
328 #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
329 #define CSR0_MERR 0x0800 /* memory error (RC) */
330 #define CSR0_MISS 0x1000 /* missed frame (RC) */
331 #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
332 #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
333 #define CSR0_ERR 0x8000 /* error (RC) */
336 #define CSR3_BCON 0x0001 /* byte control */
337 #define CSR3_ACON 0x0002 /* ALE control */
338 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
342 /***************************** Prototypes *****************************/
344 static int addr_accessible( volatile void *regp, int wordflag, int
346 static unsigned long lance_probe1( struct net_device *dev, struct lance_addr
348 static int lance_open( struct net_device *dev );
349 static void lance_init_ring( struct net_device *dev );
350 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
351 static void lance_interrupt( int irq, void *dev_id, struct pt_regs *fp );
352 static int lance_rx( struct net_device *dev );
353 static int lance_close( struct net_device *dev );
354 static struct net_device_stats *lance_get_stats( struct net_device *dev );
355 static void set_multicast_list( struct net_device *dev );
356 static int lance_set_mac_address( struct net_device *dev, void *addr );
357 static void lance_tx_timeout (struct net_device *dev);
359 /************************* End of Prototypes **************************/
365 static void *slow_memcpy( void *dst, const void *src, size_t len )
368 const char *cfrom = src;
378 int __init atarilance_probe( struct net_device *dev )
383 SET_MODULE_OWNER(dev);
385 if (!MACH_IS_ATARI || found)
386 /* Assume there's only one board possible... That seems true, since
387 * the Riebl/PAM board's address cannot be changed. */
390 for( i = 0; i < N_LANCE_ADDR; ++i ) {
391 if (lance_probe1( dev, &lance_addr_list[i] )) {
401 /* Derived from hwreg_present() in atari/config.c: */
403 static int __init addr_accessible( volatile void *regp, int wordflag, int writeflag )
407 long *vbr, save_berr;
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 restore_flags(flags);
453 static unsigned long __init lance_probe1( struct net_device *dev,
454 struct lance_addr *init_rec )
456 volatile unsigned short *memaddr =
457 (volatile unsigned short *)init_rec->memaddr;
458 volatile unsigned short *ioaddr =
459 (volatile unsigned short *)init_rec->ioaddr;
460 struct lance_private *lp;
461 struct lance_ioreg *IO;
463 static int did_version;
464 unsigned short save1, save2;
466 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
467 (long)memaddr, (long)ioaddr ));
469 /* Test whether memory readable and writable */
470 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
471 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
473 /* Written values should come back... */
474 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
477 if (*memaddr != 0x0001) goto probe_fail;
478 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
480 if (*memaddr != 0x0000) goto probe_fail;
483 /* First port should be readable and writable */
484 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
485 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
487 /* and written values should be readable */
488 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
491 if (ioaddr[1] != 0x0001) goto probe_fail;
493 /* The CSR0_INIT bit should not be readable */
494 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
497 ioaddr[0] = CSR0_INIT | CSR0_STOP;
498 if (ioaddr[0] != CSR0_STOP) {
503 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
504 ioaddr[0] = CSR0_STOP;
505 if (ioaddr[0] != CSR0_STOP) {
512 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
519 init_etherdev( dev, sizeof(struct lance_private) );
521 dev->priv = kmalloc( sizeof(struct lance_private), GFP_KERNEL );
525 lp = (struct lance_private *)dev->priv;
526 MEM = (struct lance_memory *)memaddr;
527 IO = lp->iobase = (struct lance_ioreg *)ioaddr;
528 dev->base_addr = (unsigned long)ioaddr; /* informational only */
529 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
531 REGA( CSR0 ) = CSR0_STOP;
533 /* Now test for type: If the eeprom I/O port is readable, it is a
535 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
536 /* Switch back to Ram */
538 lp->cardtype = PAM_CARD;
540 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
541 lp->cardtype = NEW_RIEBL;
544 lp->cardtype = OLD_RIEBL;
546 if (lp->cardtype == PAM_CARD ||
547 memaddr == (unsigned short *)0xffe00000) {
548 /* PAMs card and Riebl on ST use level 5 autovector */
549 request_irq(IRQ_AUTO_5, lance_interrupt, IRQ_TYPE_PRIO,
550 "PAM/Riebl-ST Ethernet", dev);
551 dev->irq = (unsigned short)IRQ_AUTO_5;
554 /* For VME-RieblCards, request a free VME int;
555 * (This must be unsigned long, since dev->irq is short and the
556 * IRQ_MACHSPEC bit would be cut off...)
558 unsigned long irq = atari_register_vme_int();
560 printk( "Lance: request for VME interrupt failed\n" );
563 request_irq(irq, lance_interrupt, IRQ_TYPE_PRIO,
564 "Riebl-VME Ethernet", dev);
568 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
569 dev->name, lance_names[lp->cardtype],
570 (unsigned long)ioaddr,
571 (unsigned long)memaddr,
573 init_rec->slow_flag ? " (slow memcpy)" : "" );
575 /* Get the ethernet address */
576 switch( lp->cardtype ) {
578 /* No ethernet address! (Set some default address) */
579 memcpy( dev->dev_addr, OldRieblDefHwaddr, 6 );
582 lp->memcpy_f( dev->dev_addr, RIEBL_HWADDR_ADDR, 6 );
586 for( i = 0; i < 6; ++i )
588 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
589 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
593 for( i = 0; i < 6; ++i )
594 printk( "%02x%s", dev->dev_addr[i], (i < 5) ? ":" : "\n" );
595 if (lp->cardtype == OLD_RIEBL) {
596 printk( "%s: Warning: This is a default ethernet address!\n",
598 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
601 lp->devlock = SPIN_LOCK_UNLOCKED;
603 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
604 for( i = 0; i < 6; i++ )
605 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
606 MEM->init.filter[0] = 0x00000000;
607 MEM->init.filter[1] = 0x00000000;
608 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
609 MEM->init.rx_ring.adr_hi = 0;
610 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
611 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
612 MEM->init.tx_ring.adr_hi = 0;
613 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
615 if (lp->cardtype == PAM_CARD)
616 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
618 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
620 if (did_version++ == 0)
621 DPRINTK( 1, ( version ));
623 /* The LANCE-specific entries in the device structure. */
624 dev->open = &lance_open;
625 dev->hard_start_xmit = &lance_start_xmit;
626 dev->stop = &lance_close;
627 dev->get_stats = &lance_get_stats;
628 dev->set_multicast_list = &set_multicast_list;
629 dev->set_mac_address = &lance_set_mac_address;
632 dev->tx_timeout = lance_tx_timeout;
633 dev->watchdog_timeo = TX_TIMEOUT;
640 memset( &lp->stats, 0, sizeof(lp->stats) );
646 static int lance_open( struct net_device *dev )
648 { struct lance_private *lp = (struct lance_private *)dev->priv;
649 struct lance_ioreg *IO = lp->iobase;
652 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
654 lance_init_ring(dev);
655 /* Re-initialize the LANCE, and start it when done. */
657 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
660 REGA( CSR0 ) = CSR0_INIT;
661 /* From now on, AREG is kept to point to CSR0 */
665 if (DREG & CSR0_IDON)
667 if (i < 0 || (DREG & CSR0_ERR)) {
668 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
669 dev->name, i, DREG ));
677 netif_start_queue (dev);
679 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
685 /* Initialize the LANCE Rx and Tx rings. */
687 static void lance_init_ring( struct net_device *dev )
689 { struct lance_private *lp = (struct lance_private *)dev->priv;
694 lp->cur_rx = lp->cur_tx = 0;
697 offset = offsetof( struct lance_memory, packet_area );
699 /* If the packet buffer at offset 'o' would conflict with the reserved area
700 * of RieblCards, advance it */
701 #define CHECK_OFFSET(o) \
703 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
704 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
705 : (o) < RIEBL_RSVD_END) \
706 (o) = RIEBL_RSVD_END; \
710 for( i = 0; i < TX_RING_SIZE; i++ ) {
711 CHECK_OFFSET(offset);
712 MEM->tx_head[i].base = offset;
713 MEM->tx_head[i].flag = TMD1_OWN_HOST;
714 MEM->tx_head[i].base_hi = 0;
715 MEM->tx_head[i].length = 0;
716 MEM->tx_head[i].misc = 0;
717 offset += PKT_BUF_SZ;
720 for( i = 0; i < RX_RING_SIZE; i++ ) {
721 CHECK_OFFSET(offset);
722 MEM->rx_head[i].base = offset;
723 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
724 MEM->rx_head[i].base_hi = 0;
725 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
726 MEM->rx_head[i].msg_length = 0;
727 offset += PKT_BUF_SZ;
732 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
735 static void lance_tx_timeout (struct net_device *dev)
737 struct lance_private *lp = (struct lance_private *) dev->priv;
738 struct lance_ioreg *IO = lp->iobase;
741 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
745 * Always set BSWP after a STOP as STOP puts it back into
746 * little endian mode.
748 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
749 lp->stats.tx_errors++;
750 #ifndef final_version
752 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
753 lp->dirty_tx, lp->cur_tx,
754 lp->tx_full ? " (full)" : "",
756 for( i = 0 ; i < RX_RING_SIZE; i++ )
757 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
758 i, MEM->rx_head[i].base,
759 -MEM->rx_head[i].buf_length,
760 MEM->rx_head[i].msg_length ));
761 for( i = 0 ; i < TX_RING_SIZE; i++ )
762 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
763 i, MEM->tx_head[i].base,
764 -MEM->tx_head[i].length,
765 MEM->tx_head[i].misc ));
768 /* XXX MSch: maybe purge/reinit ring here */
769 /* lance_restart, essentially */
770 lance_init_ring(dev);
771 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
772 dev->trans_start = jiffies;
773 netif_wake_queue (dev);
776 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
778 static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
780 { struct lance_private *lp = (struct lance_private *)dev->priv;
781 struct lance_ioreg *IO = lp->iobase;
783 struct lance_tx_head *head;
786 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
789 netif_stop_queue (dev);
791 /* Fill in a Tx ring entry */
792 if (lance_debug >= 3) {
795 printk( "%s: TX pkt type 0x%04x from ", dev->name,
796 ((u_short *)skb->data)[6]);
797 for( p = &((u_char *)skb->data)[6], i = 0; i < 6; i++ )
798 printk("%02x%s", *p++, i != 5 ? ":" : "" );
800 for( p = (u_char *)skb->data, i = 0; i < 6; i++ )
801 printk("%02x%s", *p++, i != 5 ? ":" : "" );
802 printk(" data at 0x%08x len %d\n", (int)skb->data,
806 /* We're not prepared for the int until the last flags are set/reset. And
807 * the int may happen already after setting the OWN_CHIP... */
808 spin_lock_irqsave (&lp->devlock, flags);
810 /* Mask to ring buffer boundary. */
811 entry = lp->cur_tx & TX_RING_MOD_MASK;
812 head = &(MEM->tx_head[entry]);
814 /* Caution: the write order is important here, set the "ownership" bits
818 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
819 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
820 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
821 if (lp->cardtype == PAM_CARD && (len & 1))
826 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
827 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
828 lp->stats.tx_bytes += skb->len;
829 dev_kfree_skb( skb );
831 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
832 lp->cur_tx -= TX_RING_SIZE;
833 lp->dirty_tx -= TX_RING_SIZE;
836 /* Trigger an immediate send poll. */
837 DREG = CSR0_INEA | CSR0_TDMD;
838 dev->trans_start = jiffies;
840 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
842 netif_start_queue (dev);
845 spin_unlock_irqrestore (&lp->devlock, flags);
850 /* The LANCE interrupt handler. */
852 static void lance_interrupt( int irq, void *dev_id, struct pt_regs *fp)
854 struct net_device *dev = dev_id;
855 struct lance_private *lp;
856 struct lance_ioreg *IO;
857 int csr0, boguscnt = 10;
860 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
864 lp = (struct lance_private *)dev->priv;
866 spin_lock (&lp->devlock);
870 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
872 /* Acknowledge all of the current interrupt sources ASAP. */
873 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
874 CSR0_TDMD | CSR0_INEA);
876 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
877 dev->name, csr0, DREG ));
879 if (csr0 & CSR0_RINT) /* Rx interrupt */
882 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
883 int dirty_tx = lp->dirty_tx;
885 while( dirty_tx < lp->cur_tx) {
886 int entry = dirty_tx & TX_RING_MOD_MASK;
887 int status = MEM->tx_head[entry].flag;
889 if (status & TMD1_OWN_CHIP)
890 break; /* It still hasn't been Txed */
892 MEM->tx_head[entry].flag = 0;
894 if (status & TMD1_ERR) {
895 /* There was an major error, log it. */
896 int err_status = MEM->tx_head[entry].misc;
897 lp->stats.tx_errors++;
898 if (err_status & TMD3_RTRY) lp->stats.tx_aborted_errors++;
899 if (err_status & TMD3_LCAR) lp->stats.tx_carrier_errors++;
900 if (err_status & TMD3_LCOL) lp->stats.tx_window_errors++;
901 if (err_status & TMD3_UFLO) {
902 /* Ackk! On FIFO errors the Tx unit is turned off! */
903 lp->stats.tx_fifo_errors++;
904 /* Remove this verbosity later! */
905 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
907 /* Restart the chip. */
911 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
912 lp->stats.collisions++;
913 lp->stats.tx_packets++;
916 /* XXX MSch: free skb?? */
920 #ifndef final_version
921 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
922 DPRINTK( 0, ( "out-of-sync dirty pointer,"
923 " %d vs. %d, full=%ld.\n",
924 dirty_tx, lp->cur_tx, lp->tx_full ));
925 dirty_tx += TX_RING_SIZE;
929 if (lp->tx_full && (netif_queue_stopped(dev))
930 && dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
931 /* The ring is no longer full, clear tbusy. */
933 netif_wake_queue (dev);
936 lp->dirty_tx = dirty_tx;
939 /* Log misc errors. */
940 if (csr0 & CSR0_BABL) lp->stats.tx_errors++; /* Tx babble. */
941 if (csr0 & CSR0_MISS) lp->stats.rx_errors++; /* Missed a Rx frame. */
942 if (csr0 & CSR0_MERR) {
943 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
944 "status %04x.\n", dev->name, csr0 ));
945 /* Restart the chip. */
950 /* Clear any other interrupt, and set interrupt enable. */
951 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
952 CSR0_IDON | CSR0_INEA;
954 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
957 spin_unlock (&lp->devlock);
961 static int lance_rx( struct net_device *dev )
963 { struct lance_private *lp = (struct lance_private *)dev->priv;
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 lp->stats.rx_errors++; /* end of a packet.*/
982 if (status & RMD1_FRAM) lp->stats.rx_frame_errors++;
983 if (status & RMD1_OFLO) lp->stats.rx_over_errors++;
984 if (status & RMD1_CRC) lp->stats.rx_crc_errors++;
985 if (status & RMD1_BUFF) lp->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 lp->stats.rx_errors++;
997 skb = dev_alloc_skb( pkt_len+2 );
999 DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
1001 for( i = 0; i < RX_RING_SIZE; i++ )
1002 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
1006 if (i > RX_RING_SIZE - 2) {
1007 lp->stats.rx_dropped++;
1008 head->flag |= RMD1_OWN_CHIP;
1014 if (lance_debug >= 3) {
1015 u_char *data = PKTBUF_ADDR(head), *p;
1016 printk( "%s: RX pkt type 0x%04x from ", dev->name,
1017 ((u_short *)data)[6]);
1018 for( p = &data[6], i = 0; i < 6; i++ )
1019 printk("%02x%s", *p++, i != 5 ? ":" : "" );
1021 for( p = data, i = 0; i < 6; i++ )
1022 printk("%02x%s", *p++, i != 5 ? ":" : "" );
1023 printk(" data %02x %02x %02x %02x %02x %02x %02x %02x "
1025 data[15], data[16], data[17], data[18],
1026 data[19], data[20], data[21], data[22],
1031 skb_reserve( skb, 2 ); /* 16 byte align */
1032 skb_put( skb, pkt_len ); /* Make room */
1033 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1034 skb->protocol = eth_type_trans( skb, dev );
1036 dev->last_rx = jiffies;
1037 lp->stats.rx_packets++;
1038 lp->stats.rx_bytes += pkt_len;
1042 head->flag |= RMD1_OWN_CHIP;
1043 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1045 lp->cur_rx &= RX_RING_MOD_MASK;
1047 /* From lance.c (Donald Becker): */
1048 /* We should check that at least two ring entries are free. If not,
1049 we should free one and mark stats->rx_dropped++. */
1055 static int lance_close( struct net_device *dev )
1057 { struct lance_private *lp = (struct lance_private *)dev->priv;
1058 struct lance_ioreg *IO = lp->iobase;
1060 netif_stop_queue (dev);
1064 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1067 /* We stop the LANCE here -- it occasionally polls
1068 memory if we don't. */
1075 static struct net_device_stats *lance_get_stats( struct net_device *dev )
1077 { struct lance_private *lp = (struct lance_private *)dev->priv;
1083 /* Set or clear the multicast filter for this adaptor.
1084 num_addrs == -1 Promiscuous mode, receive all packets
1085 num_addrs == 0 Normal mode, clear multicast list
1086 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1087 best-effort filtering.
1090 static void set_multicast_list( struct net_device *dev )
1092 { struct lance_private *lp = (struct lance_private *)dev->priv;
1093 struct lance_ioreg *IO = lp->iobase;
1095 if (netif_running(dev))
1096 /* Only possible if board is already started */
1099 /* We take the simple way out and always enable promiscuous mode. */
1100 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1102 if (dev->flags & IFF_PROMISC) {
1103 /* Log any net taps. */
1104 DPRINTK( 1, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1105 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1107 short multicast_table[4];
1108 int num_addrs = dev->mc_count;
1110 /* We don't use the multicast table, but rely on upper-layer
1112 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1113 sizeof(multicast_table) );
1114 for( i = 0; i < 4; i++ )
1115 REGA( CSR8+i ) = multicast_table[i];
1116 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1120 * Always set BSWP after a STOP as STOP puts it back into
1121 * little endian mode.
1123 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1125 /* Resume normal operation and reset AREG to CSR0 */
1126 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1130 /* This is needed for old RieblCards and possible for new RieblCards */
1132 static int lance_set_mac_address( struct net_device *dev, void *addr )
1134 { struct lance_private *lp = (struct lance_private *)dev->priv;
1135 struct sockaddr *saddr = addr;
1138 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1139 return( -EOPNOTSUPP );
1141 if (netif_running(dev)) {
1142 /* Only possible while card isn't started */
1143 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1148 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1149 for( i = 0; i < 6; i++ )
1150 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1151 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1152 /* set also the magic for future sessions */
1153 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1160 static struct net_device atarilance_dev;
1162 int init_module(void)
1166 atarilance_dev.init = atarilance_probe;
1167 if ((err = register_netdev( &atarilance_dev ))) {
1169 printk( "No Atari Lance board found. Module not loaded.\n");
1176 void cleanup_module(void)
1179 unregister_netdev( &atarilance_dev );