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/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[0]; /* 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);
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(int unit)
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 sprintf(dev->name, "eth%d", unit);
387 netdev_boot_setup_check(dev);
390 for( i = 0; i < N_LANCE_ADDR; ++i ) {
391 if (lance_probe1( dev, &lance_addr_list[i] )) {
393 err = register_netdev(dev);
396 free_irq(dev->irq, dev);
405 /* Derived from hwreg_present() in atari/config.c: */
407 static noinline int __init addr_accessible(volatile void *regp, int wordflag,
412 long *vbr, save_berr;
414 local_irq_save(flags);
416 __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : );
420 ( "movel %/sp,%/d1\n\t"
421 "movel #Lberr,%2@\n\t"
428 "1: movew %1@,%/d0\n\t"
444 "Lberr: movel %/d1,%/sp"
446 : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag)
447 : "d0", "d1", "memory"
451 local_irq_restore(flags);
456 static const struct net_device_ops lance_netdev_ops = {
457 .ndo_open = lance_open,
458 .ndo_stop = lance_close,
459 .ndo_start_xmit = lance_start_xmit,
460 .ndo_set_rx_mode = set_multicast_list,
461 .ndo_set_mac_address = lance_set_mac_address,
462 .ndo_tx_timeout = lance_tx_timeout,
463 .ndo_validate_addr = eth_validate_addr,
464 .ndo_change_mtu = eth_change_mtu,
467 static unsigned long __init lance_probe1( struct net_device *dev,
468 struct lance_addr *init_rec )
470 volatile unsigned short *memaddr =
471 (volatile unsigned short *)init_rec->memaddr;
472 volatile unsigned short *ioaddr =
473 (volatile unsigned short *)init_rec->ioaddr;
474 struct lance_private *lp;
475 struct lance_ioreg *IO;
477 static int did_version;
478 unsigned short save1, save2;
480 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
481 (long)memaddr, (long)ioaddr ));
483 /* Test whether memory readable and writable */
484 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
485 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;
487 /* Written values should come back... */
488 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
491 if (*memaddr != 0x0001) goto probe_fail;
492 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
494 if (*memaddr != 0x0000) goto probe_fail;
497 /* First port should be readable and writable */
498 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
499 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;
501 /* and written values should be readable */
502 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
505 if (ioaddr[1] != 0x0001) goto probe_fail;
507 /* The CSR0_INIT bit should not be readable */
508 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
511 ioaddr[0] = CSR0_INIT | CSR0_STOP;
512 if (ioaddr[0] != CSR0_STOP) {
517 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
518 ioaddr[0] = CSR0_STOP;
519 if (ioaddr[0] != CSR0_STOP) {
526 PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
533 lp = netdev_priv(dev);
534 MEM = (struct lance_memory *)memaddr;
535 IO = lp->iobase = (struct lance_ioreg *)ioaddr;
536 dev->base_addr = (unsigned long)ioaddr; /* informational only */
537 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;
539 REGA( CSR0 ) = CSR0_STOP;
541 /* Now test for type: If the eeprom I/O port is readable, it is a
543 if (addr_accessible( &(IO->eeprom), 0, 0 )) {
544 /* Switch back to Ram */
546 lp->cardtype = PAM_CARD;
548 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
549 lp->cardtype = NEW_RIEBL;
552 lp->cardtype = OLD_RIEBL;
554 if (lp->cardtype == PAM_CARD ||
555 memaddr == (unsigned short *)0xffe00000) {
556 /* PAMs card and Riebl on ST use level 5 autovector */
557 if (request_irq(IRQ_AUTO_5, lance_interrupt, 0,
558 "PAM,Riebl-ST Ethernet", dev)) {
559 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 );
562 dev->irq = IRQ_AUTO_5;
565 /* For VME-RieblCards, request a free VME int */
566 unsigned int irq = atari_register_vme_int();
568 printk( "Lance: request for VME interrupt failed\n" );
571 if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet",
573 printk( "Lance: request for irq %u failed\n", irq );
579 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
580 dev->name, lance_names[lp->cardtype],
581 (unsigned long)ioaddr,
582 (unsigned long)memaddr,
584 init_rec->slow_flag ? " (slow memcpy)" : "" );
586 /* Get the ethernet address */
587 switch( lp->cardtype ) {
589 /* No ethernet address! (Set some default address) */
590 memcpy(dev->dev_addr, OldRieblDefHwaddr, ETH_ALEN);
593 lp->memcpy_f(dev->dev_addr, RIEBL_HWADDR_ADDR, ETH_ALEN);
597 for( i = 0; i < 6; ++i )
599 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
600 ((((unsigned short *)MEM)[i*2+1] & 0x0f));
604 printk("%pM\n", dev->dev_addr);
605 if (lp->cardtype == OLD_RIEBL) {
606 printk( "%s: Warning: This is a default ethernet address!\n",
608 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" );
611 spin_lock_init(&lp->devlock);
613 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */
614 for( i = 0; i < 6; i++ )
615 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
616 MEM->init.filter[0] = 0x00000000;
617 MEM->init.filter[1] = 0x00000000;
618 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );
619 MEM->init.rx_ring.adr_hi = 0;
620 MEM->init.rx_ring.len = RX_RING_LEN_BITS;
621 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );
622 MEM->init.tx_ring.adr_hi = 0;
623 MEM->init.tx_ring.len = TX_RING_LEN_BITS;
625 if (lp->cardtype == PAM_CARD)
626 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
628 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);
630 if (did_version++ == 0)
631 DPRINTK( 1, ( version ));
633 dev->netdev_ops = &lance_netdev_ops;
636 dev->watchdog_timeo = TX_TIMEOUT;
642 static int lance_open( struct net_device *dev )
644 struct lance_private *lp = netdev_priv(dev);
645 struct lance_ioreg *IO = lp->iobase;
648 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
650 lance_init_ring(dev);
651 /* Re-initialize the LANCE, and start it when done. */
653 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
656 REGA( CSR0 ) = CSR0_INIT;
657 /* From now on, AREG is kept to point to CSR0 */
661 if (DREG & CSR0_IDON)
663 if (i <= 0 || (DREG & CSR0_ERR)) {
664 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
665 dev->name, i, DREG ));
673 netif_start_queue (dev);
675 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
681 /* Initialize the LANCE Rx and Tx rings. */
683 static void lance_init_ring( struct net_device *dev )
685 struct lance_private *lp = netdev_priv(dev);
690 lp->cur_rx = lp->cur_tx = 0;
693 offset = offsetof( struct lance_memory, packet_area );
695 /* If the packet buffer at offset 'o' would conflict with the reserved area
696 * of RieblCards, advance it */
697 #define CHECK_OFFSET(o) \
699 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \
700 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
701 : (o) < RIEBL_RSVD_END) \
702 (o) = RIEBL_RSVD_END; \
706 for( i = 0; i < TX_RING_SIZE; i++ ) {
707 CHECK_OFFSET(offset);
708 MEM->tx_head[i].base = offset;
709 MEM->tx_head[i].flag = TMD1_OWN_HOST;
710 MEM->tx_head[i].base_hi = 0;
711 MEM->tx_head[i].length = 0;
712 MEM->tx_head[i].misc = 0;
713 offset += PKT_BUF_SZ;
716 for( i = 0; i < RX_RING_SIZE; i++ ) {
717 CHECK_OFFSET(offset);
718 MEM->rx_head[i].base = offset;
719 MEM->rx_head[i].flag = TMD1_OWN_CHIP;
720 MEM->rx_head[i].base_hi = 0;
721 MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
722 MEM->rx_head[i].msg_length = 0;
723 offset += PKT_BUF_SZ;
728 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
731 static void lance_tx_timeout (struct net_device *dev)
733 struct lance_private *lp = netdev_priv(dev);
734 struct lance_ioreg *IO = lp->iobase;
737 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
741 * Always set BSWP after a STOP as STOP puts it back into
742 * little endian mode.
744 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
745 dev->stats.tx_errors++;
746 #ifndef final_version
748 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
749 lp->dirty_tx, lp->cur_tx,
750 lp->tx_full ? " (full)" : "",
752 for( i = 0 ; i < RX_RING_SIZE; i++ )
753 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
754 i, MEM->rx_head[i].base,
755 -MEM->rx_head[i].buf_length,
756 MEM->rx_head[i].msg_length ));
757 for( i = 0 ; i < TX_RING_SIZE; i++ )
758 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
759 i, MEM->tx_head[i].base,
760 -MEM->tx_head[i].length,
761 MEM->tx_head[i].misc ));
764 /* XXX MSch: maybe purge/reinit ring here */
765 /* lance_restart, essentially */
766 lance_init_ring(dev);
767 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
768 netif_trans_update(dev); /* prevent tx timeout */
769 netif_wake_queue(dev);
772 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */
775 lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
777 struct lance_private *lp = netdev_priv(dev);
778 struct lance_ioreg *IO = lp->iobase;
780 struct lance_tx_head *head;
783 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
787 /* The old LANCE chips doesn't automatically pad buffers to min. size. */
791 /* PAM-Card has a bug: Can only send packets with even number of bytes! */
792 else if (lp->cardtype == PAM_CARD && (len & 1))
795 if (len > skb->len) {
796 if (skb_padto(skb, len))
800 netif_stop_queue (dev);
802 /* Fill in a Tx ring entry */
803 if (lance_debug >= 3) {
804 printk( "%s: TX pkt type 0x%04x from %pM to %pM"
805 " data at 0x%08x len %d\n",
806 dev->name, ((u_short *)skb->data)[6],
807 &skb->data[6], skb->data,
808 (int)skb->data, (int)skb->len );
811 /* We're not prepared for the int until the last flags are set/reset. And
812 * the int may happen already after setting the OWN_CHIP... */
813 spin_lock_irqsave (&lp->devlock, flags);
815 /* Mask to ring buffer boundary. */
816 entry = lp->cur_tx & TX_RING_MOD_MASK;
817 head = &(MEM->tx_head[entry]);
819 /* Caution: the write order is important here, set the "ownership" bits
826 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
827 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
828 dev->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;
839 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
841 netif_start_queue (dev);
844 spin_unlock_irqrestore (&lp->devlock, flags);
849 /* The LANCE interrupt handler. */
851 static irqreturn_t lance_interrupt( int irq, void *dev_id )
853 struct net_device *dev = dev_id;
854 struct lance_private *lp;
855 struct lance_ioreg *IO;
856 int csr0, boguscnt = 10;
860 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
864 lp = netdev_priv(dev);
866 spin_lock (&lp->devlock);
870 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
873 /* Acknowledge all of the current interrupt sources ASAP. */
874 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
875 CSR0_TDMD | CSR0_INEA);
877 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
878 dev->name, csr0, DREG ));
880 if (csr0 & CSR0_RINT) /* Rx interrupt */
883 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
884 int dirty_tx = lp->dirty_tx;
886 while( dirty_tx < lp->cur_tx) {
887 int entry = dirty_tx & TX_RING_MOD_MASK;
888 int status = MEM->tx_head[entry].flag;
890 if (status & TMD1_OWN_CHIP)
891 break; /* It still hasn't been Txed */
893 MEM->tx_head[entry].flag = 0;
895 if (status & TMD1_ERR) {
896 /* There was an major error, log it. */
897 int err_status = MEM->tx_head[entry].misc;
898 dev->stats.tx_errors++;
899 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
900 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
901 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++;
902 if (err_status & TMD3_UFLO) {
903 /* Ackk! On FIFO errors the Tx unit is turned off! */
904 dev->stats.tx_fifo_errors++;
905 /* Remove this verbosity later! */
906 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
908 /* Restart the chip. */
912 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
913 dev->stats.collisions++;
914 dev->stats.tx_packets++;
917 /* XXX MSch: free skb?? */
921 #ifndef final_version
922 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
923 DPRINTK( 0, ( "out-of-sync dirty pointer,"
924 " %d vs. %d, full=%ld.\n",
925 dirty_tx, lp->cur_tx, lp->tx_full ));
926 dirty_tx += TX_RING_SIZE;
930 if (lp->tx_full && (netif_queue_stopped(dev)) &&
931 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
932 /* The ring is no longer full, clear tbusy. */
934 netif_wake_queue (dev);
937 lp->dirty_tx = dirty_tx;
940 /* Log misc errors. */
941 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
942 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
943 if (csr0 & CSR0_MERR) {
944 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
945 "status %04x.\n", dev->name, csr0 ));
946 /* Restart the chip. */
951 /* Clear any other interrupt, and set interrupt enable. */
952 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
953 CSR0_IDON | CSR0_INEA;
955 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
958 spin_unlock (&lp->devlock);
959 return IRQ_RETVAL(handled);
963 static int lance_rx( struct net_device *dev )
965 struct lance_private *lp = netdev_priv(dev);
966 int entry = lp->cur_rx & RX_RING_MOD_MASK;
969 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
970 MEM->rx_head[entry].flag ));
972 /* If we own the next entry, it's a new packet. Send it up. */
973 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
974 struct lance_rx_head *head = &(MEM->rx_head[entry]);
975 int status = head->flag;
977 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
978 /* There is a tricky error noted by John Murphy,
979 <murf@perftech.com> to Russ Nelson: Even with full-sized
980 buffers it's possible for a jabber packet to use two
981 buffers, with only the last correctly noting the error. */
982 if (status & RMD1_ENP) /* Only count a general error at the */
983 dev->stats.rx_errors++; /* end of a packet.*/
984 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
985 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
986 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
987 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
988 head->flag &= (RMD1_ENP|RMD1_STP);
990 /* Malloc up new buffer, compatible with net-3. */
991 short pkt_len = head->msg_length & 0xfff;
995 printk( "%s: Runt packet!\n", dev->name );
996 dev->stats.rx_errors++;
999 skb = netdev_alloc_skb(dev, pkt_len + 2);
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 dev->stats.rx_dropped++;
1008 head->flag |= RMD1_OWN_CHIP;
1014 if (lance_debug >= 3) {
1015 u_char *data = PKTBUF_ADDR(head);
1017 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM "
1018 "data %02x %02x %02x %02x %02x %02x %02x %02x "
1020 dev->name, ((u_short *)data)[6],
1022 data[15], data[16], data[17], data[18],
1023 data[19], data[20], data[21], data[22],
1027 skb_reserve( skb, 2 ); /* 16 byte align */
1028 skb_put( skb, pkt_len ); /* Make room */
1029 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
1030 skb->protocol = eth_type_trans( skb, dev );
1032 dev->stats.rx_packets++;
1033 dev->stats.rx_bytes += pkt_len;
1037 head->flag |= RMD1_OWN_CHIP;
1038 entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
1040 lp->cur_rx &= RX_RING_MOD_MASK;
1042 /* From lance.c (Donald Becker): */
1043 /* We should check that at least two ring entries are free. If not,
1044 we should free one and mark stats->rx_dropped++. */
1050 static int lance_close( struct net_device *dev )
1052 struct lance_private *lp = netdev_priv(dev);
1053 struct lance_ioreg *IO = lp->iobase;
1055 netif_stop_queue (dev);
1059 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
1062 /* We stop the LANCE here -- it occasionally polls
1063 memory if we don't. */
1070 /* Set or clear the multicast filter for this adaptor.
1071 num_addrs == -1 Promiscuous mode, receive all packets
1072 num_addrs == 0 Normal mode, clear multicast list
1073 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
1074 best-effort filtering.
1077 static void set_multicast_list( struct net_device *dev )
1079 struct lance_private *lp = netdev_priv(dev);
1080 struct lance_ioreg *IO = lp->iobase;
1082 if (netif_running(dev))
1083 /* Only possible if board is already started */
1086 /* We take the simple way out and always enable promiscuous mode. */
1087 DREG = CSR0_STOP; /* Temporarily stop the lance. */
1089 if (dev->flags & IFF_PROMISC) {
1090 /* Log any net taps. */
1091 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name ));
1092 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
1094 short multicast_table[4];
1095 int num_addrs = netdev_mc_count(dev);
1097 /* We don't use the multicast table, but rely on upper-layer
1099 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
1100 sizeof(multicast_table) );
1101 for( i = 0; i < 4; i++ )
1102 REGA( CSR8+i ) = multicast_table[i];
1103 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
1107 * Always set BSWP after a STOP as STOP puts it back into
1108 * little endian mode.
1110 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
1112 /* Resume normal operation and reset AREG to CSR0 */
1113 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
1117 /* This is needed for old RieblCards and possible for new RieblCards */
1119 static int lance_set_mac_address( struct net_device *dev, void *addr )
1121 struct lance_private *lp = netdev_priv(dev);
1122 struct sockaddr *saddr = addr;
1125 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
1128 if (netif_running(dev)) {
1129 /* Only possible while card isn't started */
1130 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
1135 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );
1136 for( i = 0; i < 6; i++ )
1137 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
1138 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
1139 /* set also the magic for future sessions */
1140 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
1147 static struct net_device *atarilance_dev;
1149 static int __init atarilance_module_init(void)
1151 atarilance_dev = atarilance_probe(-1);
1152 return PTR_ERR_OR_ZERO(atarilance_dev);
1155 static void __exit atarilance_module_exit(void)
1157 unregister_netdev(atarilance_dev);
1158 free_irq(atarilance_dev->irq, atarilance_dev);
1159 free_netdev(atarilance_dev);
1161 module_init(atarilance_module_init);
1162 module_exit(atarilance_module_exit);