2 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
4 * This is an extension to the Linux operating system, and is covered by the
5 * same GNU General Public License that covers that work.
7 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
8 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
9 * [feel free to mail ....]
11 * when using as module: (no autoprobing!)
13 * gcc -O2 -fomit-frame-pointer -m486 -D__KERNEL__ -DMODULE -c ni52.c
15 * insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000
17 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.
19 * If you find a bug, please report me:
20 * The kernel panic output and any kmsg from the ni52 driver
21 * the ni5210-driver-version and the linux-kernel version
22 * how many shared memory (memsize) on the netcard,
23 * bootprom: yes/no, base_addr, mem_start
24 * maybe the ni5210-card revision and the i82586 version
26 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340
27 * mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,
28 * 0xd8000,0xcc000,0xce000,0xda000,0xdc000
31 * skeleton.c from Donald Becker
33 * I have also done a look in the following sources: (mail me if you need them)
34 * crynwr-packet-driver by Russ Nelson
35 * Garret A. Wollman's (fourth) i82586-driver for BSD
36 * (before getting an i82596 (yes 596 not 586) manual, the existing drivers
37 * helped me a lot to understand this tricky chip.)
40 * The internal sysbus seems to be slow. So we often lose packets because of
41 * overruns while receiving from a fast remote host.
42 * This can slow down TCP connections. Maybe the newer ni5210 cards are
43 * better. My experience is, that if a machine sends with more than about
44 * 500-600K/s the fifo/sysbus overflows.
47 * On fast networks, it's a (very) good idea to have 16K shared memory. With
48 * 8K, we can store only 4 receive frames, so it can (easily) happen that a
49 * remote machine 'overruns' our system.
51 * Known i82586/card problems (I'm sure, there are many more!):
52 * Running the NOP-mode, the i82586 sometimes seems to forget to report
53 * every xmit-interrupt until we restart the CU.
54 * Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit
55 * in the RBD-Struct which indicates an end of the RBD queue.
56 * Instead, the RU fetches another (randomly selected and
57 * usually used) RBD and begins to fill it. (Maybe, this happens only if
58 * the last buffer from the previous RFD fits exact into the queue and
59 * the next RFD can't fetch an initial RBD. Anyone knows more? )
61 * results from ftp performance tests with Linux 1.2.5
62 * send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)
63 * sending in NOP-mode: peak performance up to 530K/s (but better don't
68 * 29.Sept.96: virt_to_bus changes for new memory scheme
69 * 19.Feb.96: more Mcast changes, module support (MH)
71 * 18.Nov.95: Mcast changes (AC).
73 * 23.April.95: fixed(?) receiving problems by configuring a RFD more
74 * than the number of RBD's. Can maybe cause other problems.
75 * 18.April.95: Added MODULE support (MH)
76 * 17.April.95: MC related changes in init586() and set_multicast_list().
77 * removed use of 'jiffies' in init586() (MH)
79 * 19.Sep.94: Added Multicast support (not tested yet) (MH)
81 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.
82 * Now, every RFD has exact one RBD. (MH)
84 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)
86 * 19.Aug.94: changed request_irq() parameter (MH)
88 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)
90 * 19.July.94: lotsa cleanups .. (MH)
92 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)
94 * 4.July.94: patches for Linux 1.1.24 (MH)
96 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)
98 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff,
101 * < 30.Sep.93: first versions
104 static int debuglevel; /* debug-printk 0: off 1: a few 2: more */
105 static int automatic_resume; /* experimental .. better should be zero */
106 static int rfdadd; /* rfdadd=1 may be better for 8K MEM cards */
107 static int fifo = 0x8; /* don't change */
109 #include <linux/module.h>
110 #include <linux/kernel.h>
111 #include <linux/string.h>
112 #include <linux/errno.h>
113 #include <linux/ioport.h>
114 #include <linux/slab.h>
115 #include <linux/interrupt.h>
116 #include <linux/delay.h>
117 #include <linux/init.h>
118 #include <linux/bitops.h>
121 #include <linux/netdevice.h>
122 #include <linux/etherdevice.h>
123 #include <linux/skbuff.h>
127 #define DRV_NAME "ni52"
129 #define DEBUG /* debug on */
130 #define SYSBUSVAL 1 /* 8 Bit */
132 #define ni_attn586() { outb(0, dev->base_addr + NI52_ATTENTION); }
133 #define ni_reset586() { outb(0, dev->base_addr + NI52_RESET); }
134 #define ni_disint() { outb(0, dev->base_addr + NI52_INTDIS); }
135 #define ni_enaint() { outb(0, dev->base_addr + NI52_INTENA); }
137 #define make32(ptr16) (p->memtop + (short) (ptr16))
138 #define make24(ptr32) ((unsigned long)(ptr32)) - p->base
139 #define make16(ptr32) ((unsigned short) ((unsigned long)(ptr32)\
140 - (unsigned long) p->memtop))
142 /******************* how to calculate the buffers *****************************
144 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
145 * --------------- in a different (more stable?) mode. Only in this mode it's
146 * possible to configure the driver with 'NO_NOPCOMMANDS'
148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
150 sizeof(rfd) = 24; sizeof(rbd) = 12;
151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
154 * if you don't know the driver, better do not change these values: */
156 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
157 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
158 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
159 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
160 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
161 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
163 /**************************************************************************/
166 #define NI52_TOTAL_SIZE 16
167 #define NI52_ADDR0 0x02
168 #define NI52_ADDR1 0x07
169 #define NI52_ADDR2 0x01
171 static int ni52_probe1(struct net_device *dev, int ioaddr);
172 static irqreturn_t ni52_interrupt(int irq, void *dev_id);
173 static int ni52_open(struct net_device *dev);
174 static int ni52_close(struct net_device *dev);
175 static int ni52_send_packet(struct sk_buff *, struct net_device *);
176 static struct net_device_stats *ni52_get_stats(struct net_device *dev);
177 static void set_multicast_list(struct net_device *dev);
178 static void ni52_timeout(struct net_device *dev);
180 /* helper-functions */
181 static int init586(struct net_device *dev);
182 static int check586(struct net_device *dev, unsigned size);
183 static void alloc586(struct net_device *dev);
184 static void startrecv586(struct net_device *dev);
185 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr);
186 static void ni52_rcv_int(struct net_device *dev);
187 static void ni52_xmt_int(struct net_device *dev);
188 static void ni52_rnr_int(struct net_device *dev);
191 struct net_device_stats stats;
193 char __iomem *memtop;
196 struct rfd_struct __iomem *rfd_last, *rfd_top, *rfd_first;
197 struct scp_struct __iomem *scp;
198 struct iscp_struct __iomem *iscp;
199 struct scb_struct __iomem *scb;
200 struct tbd_struct __iomem *xmit_buffs[NUM_XMIT_BUFFS];
201 #if (NUM_XMIT_BUFFS == 1)
202 struct transmit_cmd_struct __iomem *xmit_cmds[2];
203 struct nop_cmd_struct __iomem *nop_cmds[2];
205 struct transmit_cmd_struct __iomem *xmit_cmds[NUM_XMIT_BUFFS];
206 struct nop_cmd_struct __iomem *nop_cmds[NUM_XMIT_BUFFS];
208 int nop_point, num_recv_buffs;
209 char __iomem *xmit_cbuffs[NUM_XMIT_BUFFS];
210 int xmit_count, xmit_last;
213 /* wait for command with timeout: */
214 static void wait_for_scb_cmd(struct net_device *dev)
216 struct priv *p = dev->priv;
218 for (i = 0; i < 16384; i++) {
219 if (readb(&p->scb->cmd_cuc) == 0)
223 printk(KERN_ERR "%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",
224 dev->name, readb(&p->scb->cmd_cuc), readb(&p->scb->cus));
233 static void wait_for_scb_cmd_ruc(struct net_device *dev)
235 struct priv *p = dev->priv;
237 for (i = 0; i < 16384; i++) {
238 if (readb(&p->scb->cmd_ruc) == 0)
242 printk(KERN_ERR "%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",
243 dev->name, p->scb->cmd_ruc, p->scb->rus);
252 static void wait_for_stat_compl(void __iomem *p)
254 struct nop_cmd_struct __iomem *addr = p;
256 for (i = 0; i < 32767; i++) {
257 if (readw(&((addr)->cmd_status)) & STAT_COMPL)
263 /**********************************************
266 static int ni52_close(struct net_device *dev)
268 free_irq(dev->irq, dev);
269 ni_reset586(); /* the hard way to stop the receiver */
270 netif_stop_queue(dev);
274 /**********************************************
277 static int ni52_open(struct net_device *dev)
287 ret = request_irq(dev->irq, &ni52_interrupt, 0, dev->name, dev);
292 netif_start_queue(dev);
293 return 0; /* most done by init */
296 /**********************************************
297 * Check to see if there's an 82586 out there.
299 static int check586(struct net_device *dev, unsigned size)
301 unsigned long where = dev->mem_start;
303 struct priv *p = /* (struct priv *) dev->priv*/ &pb;
304 char __iomem *iscp_addrs[2];
307 p->base = (unsigned long) isa_bus_to_virt(where) + size - 0x01000000;
308 p->memtop = (char __iomem *)isa_bus_to_virt(where) + size;
309 p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
310 memset_io(p->scp, 0, sizeof(struct scp_struct));
311 for (i = 0; i < sizeof(struct scp_struct); i++)
312 /* memory was writeable? */
313 if (readb((char __iomem *)p->scp + i))
315 writeb(SYSBUSVAL, &p->scp->sysbus); /* 1 = 8Bit-Bus, 0 = 16 Bit */
316 if (readb(&p->scp->sysbus) != SYSBUSVAL)
319 iscp_addrs[0] = (char __iomem *)isa_bus_to_virt(where);
320 iscp_addrs[1] = (char __iomem *)p->scp - sizeof(struct iscp_struct);
322 for (i = 0; i < 2; i++) {
323 p->iscp = (struct iscp_struct __iomem *) iscp_addrs[i];
324 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
326 writel(make24(p->iscp), &p->scp->iscp);
327 writeb(1, &p->iscp->busy);
331 mdelay(32); /* wait a while... */
332 /* i82586 clears 'busy' after successful init */
333 if (readb(&p->iscp->busy))
339 /******************************************************************
340 * set iscp at the right place, called by ni52_probe1 and open586.
342 static void alloc586(struct net_device *dev)
344 struct priv *p = (struct priv *) dev->priv;
349 spin_lock_init(&p->spinlock);
351 p->scp = (struct scp_struct __iomem *) (p->base + SCP_DEFAULT_ADDRESS);
352 p->scb = (struct scb_struct __iomem *) isa_bus_to_virt(dev->mem_start);
353 p->iscp = (struct iscp_struct __iomem *)
354 ((char __iomem *)p->scp - sizeof(struct iscp_struct));
356 memset_io(p->iscp, 0, sizeof(struct iscp_struct));
357 memset_io(p->scp , 0, sizeof(struct scp_struct));
359 writel(make24(p->iscp), &p->scp->iscp);
360 writeb(SYSBUSVAL, &p->scp->sysbus);
361 writew(make16(p->scb), &p->iscp->scb_offset);
363 writeb(1, &p->iscp->busy);
369 if (readb(&p->iscp->busy))
370 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
374 memset_io(p->scb, 0, sizeof(struct scb_struct));
377 /* set: io,irq,memstart,memend or set it when calling insmod */
379 static int io = 0x300;
380 static long memstart; /* e.g 0xd0000 */
381 static long memend; /* e.g 0xd4000 */
383 /**********************************************
384 * probe the ni5210-card
386 struct net_device * __init ni52_probe(int unit)
388 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
389 static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};
394 return ERR_PTR(-ENOMEM);
397 sprintf(dev->name, "eth%d", unit);
398 netdev_boot_setup_check(dev);
401 memstart = dev->mem_start;
402 memend = dev->mem_end;
405 if (io > 0x1ff) { /* Check a single specified location. */
406 err = ni52_probe1(dev, io);
407 } else if (io > 0) { /* Don't probe at all. */
410 for (port = ports; *port && ni52_probe1(dev, *port) ; port++)
415 for (io = 0x200; io < 0x400 && ni52_probe1(dev, io); io += 8)
425 err = register_netdev(dev);
430 release_region(dev->base_addr, NI52_TOTAL_SIZE);
436 static int __init ni52_probe1(struct net_device *dev, int ioaddr)
440 dev->base_addr = ioaddr;
442 dev->mem_start = memstart;
443 dev->mem_end = memend;
445 if (!request_region(ioaddr, NI52_TOTAL_SIZE, DRV_NAME))
448 if (!(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||
449 !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2)) {
454 for (i = 0; i < ETH_ALEN; i++)
455 dev->dev_addr[i] = inb(dev->base_addr+i);
457 if (dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1
458 || dev->dev_addr[2] != NI52_ADDR2) {
463 printk(KERN_INFO "%s: NI5210 found at %#3lx, ",
464 dev->name, dev->base_addr);
467 * check (or search) IO-Memory, 8K and 16K
470 size = dev->mem_end - dev->mem_start;
471 if (size != 0x2000 && size != 0x4000) {
473 printk(KERN_ERR "%s: Invalid memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n", dev->name, size);
477 if (!check586(dev, size)) {
478 printk(KERN_ERR "?memcheck, Can't find memory at 0x%lx with size %d!\n", dev->mem_start, size);
483 if (dev->mem_start != 0) {
484 /* no auto-mem-probe */
485 size = 0x4000; /* check for 16K mem */
486 if (!check586(dev, size)) {
487 size = 0x2000; /* check for 8K mem */
488 if (!check586(dev, size)) {
489 printk(KERN_ERR "?memprobe, Can't find memory at 0x%lx!\n", dev->mem_start);
495 static const unsigned long memaddrs[] = {
496 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000,
497 0xd4000, 0xd6000, 0xd8000, 0xda000, 0xdc000, 0
501 printk(KERN_ERR "?memprobe, Can't find io-memory!\n");
505 dev->mem_start = memaddrs[i];
506 size = 0x2000; /* check for 8K mem */
507 if (check586(dev, size))
510 size = 0x4000; /* check for 16K mem */
511 if (check586(dev, size))
516 /* set mem_end showed by 'ifconfig' */
517 dev->mem_end = dev->mem_start + size;
520 memset((char *)dev->priv, 0, sizeof(struct priv));
522 ((struct priv *)(dev->priv))->memtop =
523 (char __iomem *)isa_bus_to_virt(dev->mem_start) + size;
524 ((struct priv *)(dev->priv))->base = (unsigned long)
525 isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
528 /* set number of receive-buffs according to memsize */
530 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;
532 ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;
534 printk(KERN_DEBUG "Memaddr: 0x%lx, Memsize: %d, ",
535 dev->mem_start, size);
538 unsigned long irq_mask;
540 irq_mask = probe_irq_on();
545 dev->irq = probe_irq_off(irq_mask);
547 printk("?autoirq, Failed to detect IRQ line!\n");
551 printk("IRQ %d (autodetected).\n", dev->irq);
555 printk("IRQ %d (assigned and not checked!).\n", dev->irq);
558 dev->open = ni52_open;
559 dev->stop = ni52_close;
560 dev->get_stats = ni52_get_stats;
561 dev->tx_timeout = ni52_timeout;
562 dev->watchdog_timeo = HZ/20;
563 dev->hard_start_xmit = ni52_send_packet;
564 dev->set_multicast_list = set_multicast_list;
570 release_region(ioaddr, NI52_TOTAL_SIZE);
574 /**********************************************
575 * init the chip (ni52-interrupt should be disabled?!)
576 * needs a correct 'allocated' memory
579 static int init586(struct net_device *dev)
583 struct priv *p = (struct priv *)dev->priv;
584 struct configure_cmd_struct __iomem *cfg_cmd;
585 struct iasetup_cmd_struct __iomem *ias_cmd;
586 struct tdr_cmd_struct __iomem *tdr_cmd;
587 struct mcsetup_cmd_struct __iomem *mc_cmd;
588 struct dev_mc_list *dmi = dev->mc_list;
589 int num_addrs = dev->mc_count;
593 cfg_cmd = ptr; /* configure-command */
594 writew(0, &cfg_cmd->cmd_status);
595 writew(CMD_CONFIGURE | CMD_LAST, &cfg_cmd->cmd_cmd);
596 writew(0xFFFF, &cfg_cmd->cmd_link);
598 /* number of cfg bytes */
599 writeb(0x0a, &cfg_cmd->byte_cnt);
600 /* fifo-limit (8=tx:32/rx:64) */
601 writeb(fifo, &cfg_cmd->fifo);
602 /* hold or discard bad recv frames (bit 7) */
603 writeb(0x40, &cfg_cmd->sav_bf);
604 /* addr_len |!src_insert |pre-len |loopback */
605 writeb(0x2e, &cfg_cmd->adr_len);
606 writeb(0x00, &cfg_cmd->priority);
607 writeb(0x60, &cfg_cmd->ifs);;
608 writeb(0x00, &cfg_cmd->time_low);
609 writeb(0xf2, &cfg_cmd->time_high);
610 writeb(0x00, &cfg_cmd->promisc);;
611 if (dev->flags & IFF_ALLMULTI) {
612 int len = ((char __iomem *)p->iscp - (char __iomem *)ptr - 8) / 6;
613 if (num_addrs > len) {
614 printk(KERN_ERR "%s: switching to promisc. mode\n",
616 dev->flags |= IFF_PROMISC;
619 if (dev->flags & IFF_PROMISC)
620 writeb(0x01, &cfg_cmd->promisc);
621 writeb(0x00, &cfg_cmd->carr_coll);
622 writew(make16(cfg_cmd), &p->scb->cbl_offset);
623 writew(0, &p->scb->cmd_ruc);
625 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
628 wait_for_stat_compl(cfg_cmd);
630 if ((readw(&cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
631 (STAT_COMPL|STAT_OK)) {
632 printk(KERN_ERR "%s: configure command failed: %x\n",
633 dev->name, readw(&cfg_cmd->cmd_status));
638 * individual address setup
643 writew(0, &ias_cmd->cmd_status);
644 writew(CMD_IASETUP | CMD_LAST, &ias_cmd->cmd_cmd);
645 writew(0xffff, &ias_cmd->cmd_link);
647 memcpy_toio(&ias_cmd->iaddr, (char *)dev->dev_addr, ETH_ALEN);
649 writew(make16(ias_cmd), &p->scb->cbl_offset);
651 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
654 wait_for_stat_compl(ias_cmd);
656 if ((readw(&ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) !=
657 (STAT_OK|STAT_COMPL)) {
658 printk(KERN_ERR "%s (ni52): individual address setup command failed: %04x\n", dev->name, readw(&ias_cmd->cmd_status));
663 * TDR, wire check .. e.g. no resistor e.t.c
668 writew(0, &tdr_cmd->cmd_status);
669 writew(CMD_TDR | CMD_LAST, &tdr_cmd->cmd_cmd);
670 writew(0xffff, &tdr_cmd->cmd_link);
671 writew(0, &tdr_cmd->status);
673 writew(make16(tdr_cmd), &p->scb->cbl_offset);
674 writeb(CUC_START, &p->scb->cmd_cuc); /* cmd.-unit start */
677 wait_for_stat_compl(tdr_cmd);
679 if (!(readw(&tdr_cmd->cmd_status) & STAT_COMPL))
680 printk(KERN_ERR "%s: Problems while running the TDR.\n",
684 result = readw(&tdr_cmd->status);
685 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
686 ni_attn586(); /* ack the interrupts */
688 if (result & TDR_LNK_OK)
690 else if (result & TDR_XCVR_PRB)
691 printk(KERN_ERR "%s: TDR: Transceiver problem. Check the cable(s)!\n",
693 else if (result & TDR_ET_OPN)
694 printk(KERN_ERR "%s: TDR: No correct termination %d clocks away.\n",
695 dev->name, result & TDR_TIMEMASK);
696 else if (result & TDR_ET_SRT) {
697 /* time == 0 -> strange :-) */
698 if (result & TDR_TIMEMASK)
699 printk(KERN_ERR "%s: TDR: Detected a short circuit %d clocks away.\n",
700 dev->name, result & TDR_TIMEMASK);
702 printk(KERN_ERR "%s: TDR: Unknown status %04x\n",
709 if (num_addrs && !(dev->flags & IFF_PROMISC)) {
711 writew(0, &mc_cmd->cmd_status);
712 writew(CMD_MCSETUP | CMD_LAST, &mc_cmd->cmd_cmd);
713 writew(0xffff, &mc_cmd->cmd_link);
714 writew(num_addrs * 6, &mc_cmd->mc_cnt);
716 for (i = 0; i < num_addrs; i++, dmi = dmi->next)
717 memcpy_toio(mc_cmd->mc_list[i],
720 writew(make16(mc_cmd), &p->scb->cbl_offset);
721 writeb(CUC_START, &p->scb->cmd_cuc);
724 wait_for_stat_compl(mc_cmd);
726 if ((readw(&mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK))
727 != (STAT_COMPL|STAT_OK))
728 printk(KERN_ERR "%s: Can't apply multicast-address-list.\n", dev->name);
732 * alloc nop/xmit-cmds
734 #if (NUM_XMIT_BUFFS == 1)
735 for (i = 0; i < 2; i++) {
736 p->nop_cmds[i] = ptr;
737 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
738 writew(0, &p->nop_cmds[i]->cmd_status);
739 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
740 ptr = ptr + sizeof(struct nop_cmd_struct);
743 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
744 p->nop_cmds[i] = ptr;
745 writew(CMD_NOP, &p->nop_cmds[i]->cmd_cmd);
746 writew(0, &p->nop_cmds[i]->cmd_status);
747 writew(make16(p->nop_cmds[i]), &p->nop_cmds[i]->cmd_link);
748 ptr = ptr + sizeof(struct nop_cmd_struct);
752 ptr = alloc_rfa(dev, ptr); /* init receive-frame-area */
755 * alloc xmit-buffs / init xmit_cmds
757 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
758 /* Transmit cmd/buff 0 */
759 p->xmit_cmds[i] = ptr;
760 ptr = ptr + sizeof(struct transmit_cmd_struct);
761 p->xmit_cbuffs[i] = ptr; /* char-buffs */
762 ptr = ptr + XMIT_BUFF_SIZE;
763 p->xmit_buffs[i] = ptr; /* TBD */
764 ptr = ptr + sizeof(struct tbd_struct);
765 if ((void __iomem *)ptr > (void __iomem *)p->iscp) {
766 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n",
770 memset_io(p->xmit_cmds[i], 0,
771 sizeof(struct transmit_cmd_struct));
772 memset_io(p->xmit_buffs[i], 0,
773 sizeof(struct tbd_struct));
774 writew(make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]),
775 &p->xmit_cmds[i]->cmd_link);
776 writew(STAT_COMPL, &p->xmit_cmds[i]->cmd_status);
777 writew(CMD_XMIT|CMD_INT, &p->xmit_cmds[i]->cmd_cmd);
778 writew(make16(p->xmit_buffs[i]), &p->xmit_cmds[i]->tbd_offset);
779 writew(0xffff, &p->xmit_buffs[i]->next);
780 writel(make24(p->xmit_cbuffs[i]), &p->xmit_buffs[i]->buffer);
785 #ifndef NO_NOPCOMMANDS
790 * 'start transmitter'
792 #ifndef NO_NOPCOMMANDS
793 writew(make16(p->nop_cmds[0]), &p->scb->cbl_offset);
794 writeb(CUC_START, &p->scb->cmd_cuc);
796 wait_for_scb_cmd(dev);
798 writew(make16(p->xmit_cmds[0]), &p->xmit_cmds[0]->cmd_link);
799 writew(CMD_XMIT | CMD_SUSPEND | CMD_INT, &p->xmit_cmds[0]->cmd_cmd);
805 writeb(readb(&p->scb->cus) & STAT_MASK, &p->scb->cmd_cuc);
814 /******************************************************
815 * This is a helper routine for ni52_rnr_int() and init586().
816 * It sets up the Receive Frame Area (RFA).
819 static void __iomem *alloc_rfa(struct net_device *dev, void __iomem *ptr)
821 struct rfd_struct __iomem *rfd = ptr;
822 struct rbd_struct __iomem *rbd;
824 struct priv *p = (struct priv *) dev->priv;
827 sizeof(struct rfd_struct) * (p->num_recv_buffs + rfdadd));
830 for (i = 0; i < (p->num_recv_buffs + rfdadd); i++) {
831 writew(make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd)),
833 writew(0xffff, &rfd[i].rbd_offset);
836 writeb(RFD_SUSP, &rfd[p->num_recv_buffs-1+rfdadd].last);
838 ptr = rfd + (p->num_recv_buffs + rfdadd);
841 ptr = rbd + p->num_recv_buffs;
843 /* clr descriptors */
844 memset_io(rbd, 0, sizeof(struct rbd_struct) * (p->num_recv_buffs));
846 for (i = 0; i < p->num_recv_buffs; i++) {
847 writew(make16(rbd + (i+1) % p->num_recv_buffs), &rbd[i].next);
848 writew(RECV_BUFF_SIZE, &rbd[i].size);
849 writel(make24(ptr), &rbd[i].buffer);
850 ptr = ptr + RECV_BUFF_SIZE;
852 p->rfd_top = p->rfd_first;
853 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
855 writew(make16(p->rfd_first), &p->scb->rfa_offset);
856 writew(make16(rbd), &p->rfd_first->rbd_offset);
862 /**************************************************
863 * Interrupt Handler ...
866 static irqreturn_t ni52_interrupt(int irq, void *dev_id)
868 struct net_device *dev = dev_id;
873 p = (struct priv *) dev->priv;
878 spin_lock(&p->spinlock);
880 wait_for_scb_cmd(dev); /* wait for last command */
882 while ((stat = readb(&p->scb->cus) & STAT_MASK)) {
883 writeb(stat, &p->scb->cmd_cuc);
886 if (stat & STAT_FR) /* received a frame */
889 if (stat & STAT_RNR) { /* RU went 'not ready' */
891 if (readb(&p->scb->rus) & RU_SUSPEND) {
892 /* special case: RU_SUSPEND */
893 wait_for_scb_cmd(dev);
894 p->scb->cmd_ruc = RUC_RESUME;
896 wait_for_scb_cmd_ruc(dev);
898 printk(KERN_ERR "%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",
899 dev->name, stat, readb(&p->scb->rus));
904 /* Command with I-bit set complete */
908 #ifndef NO_NOPCOMMANDS
909 if (stat & STAT_CNA) { /* CU went 'not ready' */
910 if (netif_running(dev))
911 printk(KERN_ERR "%s: oops! CU has left active state. stat: %04x/%02x.\n",
912 dev->name, stat, readb(&p->scb->cus));
919 /* Wait for ack. (ni52_xmt_int can be faster than ack!!) */
920 wait_for_scb_cmd(dev);
921 if (p->scb->cmd_cuc) { /* timed out? */
922 printk(KERN_ERR "%s: Acknowledge timed out.\n",
928 spin_unlock(&p->spinlock);
935 /*******************************************************
939 static void ni52_rcv_int(struct net_device *dev)
942 unsigned short totlen;
944 struct rbd_struct __iomem *rbd;
945 struct priv *p = (struct priv *)dev->priv;
950 for (; (status = readb(&p->rfd_top->stat_high)) & RFD_COMPL;) {
951 rbd = (struct rbd_struct __iomem *) make32(p->rfd_top->rbd_offset);
952 if (status & RFD_OK) { /* frame received without error? */
953 totlen = readw(&rbd->status);
954 if (totlen & RBD_LAST) {
955 /* the first and the last buffer? */
956 totlen &= RBD_MASK; /* length of this frame */
957 writew(0x00, &rbd->status);
958 skb = (struct sk_buff *)dev_alloc_skb(totlen+2);
961 skb_put(skb, totlen);
962 skb_copy_to_linear_data(skb, (char *)p->base + (unsigned long) rbd->buffer, totlen);
963 skb->protocol = eth_type_trans(skb, dev);
965 dev->last_rx = jiffies;
966 p->stats.rx_packets++;
967 p->stats.rx_bytes += totlen;
969 p->stats.rx_dropped++;
972 /* free all RBD's until RBD_LAST is set */
974 while (!((rstat = readw(&rbd->status)) & RBD_LAST)) {
975 totlen += rstat & RBD_MASK;
977 printk(KERN_ERR "%s: Whoops .. no end mark in RBD list\n", dev->name);
980 writew(0, &rbd->status);
981 rbd = (struct rbd_struct __iomem *) make32(readl(&rbd->next));
983 totlen += rstat & RBD_MASK;
984 writew(0, &rbd->status);
985 printk(KERN_ERR "%s: received oversized frame! length: %d\n",
987 p->stats.rx_dropped++;
989 } else {/* frame !(ok), only with 'save-bad-frames' */
990 printk(KERN_ERR "%s: oops! rfd-error-status: %04x\n",
992 p->stats.rx_errors++;
994 writeb(0, &p->rfd_top->stat_high);
995 writeb(RFD_SUSP, &p->rfd_top->last); /* maybe exchange by RFD_LAST */
996 writew(0xffff, &p->rfd_top->rbd_offset);
997 writeb(0, &p->rfd_last->last); /* delete RFD_SUSP */
998 p->rfd_last = p->rfd_top;
999 p->rfd_top = (struct rfd_struct __iomem *) make32(p->rfd_top->next); /* step to next RFD */
1000 writew(make16(p->rfd_top), &p->scb->rfa_offset);
1003 printk("%d", cnt++);
1006 if (automatic_resume) {
1007 wait_for_scb_cmd(dev);
1008 writeb(RUC_RESUME, &p->scb->cmd_ruc);
1010 wait_for_scb_cmd_ruc(dev);
1016 for (i = 0; i < 1024; i++) {
1017 if (p->rfd_top->status)
1021 printk(KERN_ERR "%s: RU hasn't fetched next RFD (not busy/complete)\n", dev->name);
1029 /**********************************************************
1030 * handle 'Receiver went not ready'.
1033 static void ni52_rnr_int(struct net_device *dev)
1035 struct priv *p = (struct priv *) dev->priv;
1037 p->stats.rx_errors++;
1039 wait_for_scb_cmd(dev); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
1040 writeb(RUC_ABORT, &p->scb->cmd_ruc); /* usually the RU is in the 'no resource'-state .. abort it now. */
1042 wait_for_scb_cmd_ruc(dev); /* wait for accept cmd. */
1044 alloc_rfa(dev, p->rfd_first);
1045 /* maybe add a check here, before restarting the RU */
1046 startrecv586(dev); /* restart RU */
1048 printk(KERN_ERR "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->rus);
1052 /**********************************************************
1053 * handle xmit - interrupt
1056 static void ni52_xmt_int(struct net_device *dev)
1059 struct priv *p = (struct priv *) dev->priv;
1064 status = readw(&p->xmit_cmds[p->xmit_last]->cmd_status);
1065 if (!(status & STAT_COMPL))
1066 printk(KERN_ERR "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1068 if (status & STAT_OK) {
1069 p->stats.tx_packets++;
1070 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1072 p->stats.tx_errors++;
1073 if (status & TCMD_LATECOLL) {
1074 printk(KERN_ERR "%s: late collision detected.\n",
1076 p->stats.collisions++;
1077 } else if (status & TCMD_NOCARRIER) {
1078 p->stats.tx_carrier_errors++;
1079 printk(KERN_ERR "%s: no carrier detected.\n",
1081 } else if (status & TCMD_LOSTCTS)
1082 printk(KERN_ERR "%s: loss of CTS detected.\n",
1084 else if (status & TCMD_UNDERRUN) {
1085 p->stats.tx_fifo_errors++;
1086 printk(KERN_ERR "%s: DMA underrun detected.\n",
1088 } else if (status & TCMD_MAXCOLL) {
1089 printk(KERN_ERR "%s: Max. collisions exceeded.\n",
1091 p->stats.collisions += 16;
1094 #if (NUM_XMIT_BUFFS > 1)
1095 if ((++p->xmit_last) == NUM_XMIT_BUFFS)
1098 netif_wake_queue(dev);
1101 /***********************************************************
1102 * (re)start the receiver
1105 static void startrecv586(struct net_device *dev)
1107 struct priv *p = (struct priv *) dev->priv;
1109 wait_for_scb_cmd(dev);
1110 wait_for_scb_cmd_ruc(dev);
1111 writew(make16(p->rfd_first), &p->scb->rfa_offset);
1112 writeb(RUC_START, &p->scb->cmd_ruc);
1113 ni_attn586(); /* start cmd. */
1114 wait_for_scb_cmd_ruc(dev);
1115 /* wait for accept cmd. (no timeout!!) */
1118 static void ni52_timeout(struct net_device *dev)
1120 struct priv *p = (struct priv *) dev->priv;
1121 #ifndef NO_NOPCOMMANDS
1122 if (readb(&p->scb->cus) & CU_ACTIVE) { /* COMMAND-UNIT active? */
1123 netif_wake_queue(dev);
1125 printk(KERN_ERR "%s: strange ... timeout with CU active?!?\n",
1127 printk(KERN_ERR "%s: X0: %04x N0: %04x N1: %04x %d\n",
1128 dev->name, (int)p->xmit_cmds[0]->cmd_status,
1129 readw(&p->nop_cmds[0]->cmd_status),
1130 readw(&p->nop_cmds[1]->cmd_status),
1133 writeb(CUC_ABORT, &p->scb->cmd_cuc);
1135 wait_for_scb_cmd(dev);
1136 writew(make16(p->nop_cmds[p->nop_point]), &p->scb->cbl_offset);
1137 writeb(CUC_START, &p->scb->cmd_cuc);
1139 wait_for_scb_cmd(dev);
1140 dev->trans_start = jiffies;
1146 printk(KERN_ERR "%s: xmitter timed out, try to restart! stat: %02x\n",
1147 dev->name, readb(&p->scb->cus));
1148 printk(KERN_ERR "%s: command-stats: %04x %04x\n",
1150 readw(&p->xmit_cmds[0]->cmd_status),
1151 readw(&p->xmit_cmds[1]->cmd_status));
1152 printk(KERN_ERR "%s: check, whether you set the right interrupt number!\n",
1158 dev->trans_start = jiffies;
1161 /******************************************************
1165 static int ni52_send_packet(struct sk_buff *skb, struct net_device *dev)
1168 #ifndef NO_NOPCOMMANDS
1171 struct priv *p = (struct priv *) dev->priv;
1173 if (skb->len > XMIT_BUFF_SIZE) {
1174 printk(KERN_ERR "%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n", dev->name, XMIT_BUFF_SIZE, skb->len);
1178 netif_stop_queue(dev);
1180 skb_copy_from_linear_data(skb, (char *)p->xmit_cbuffs[p->xmit_count],
1183 if (len < ETH_ZLEN) {
1185 memset((char *)p->xmit_cbuffs[p->xmit_count]+skb->len, 0,
1189 #if (NUM_XMIT_BUFFS == 1)
1190 # ifdef NO_NOPCOMMANDS
1193 if (p->scb->cus & CU_ACTIVE) {
1194 printk(KERN_ERR "%s: Hmmm .. CU is still running and we wanna send a new packet.\n", dev->name);
1195 printk(KERN_ERR "%s: stat: %04x %04x\n",
1196 dev->name, readb(&p->scb->cus),
1197 readw(&p->xmit_cmds[0]->cmd_status));
1200 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);;
1201 for (i = 0; i < 16; i++) {
1202 writew(0, &p->xmit_cmds[0]->cmd_status);
1203 wait_for_scb_cmd(dev);
1204 if ((readb(&p->scb->cus) & CU_STATUS) == CU_SUSPEND)
1205 writeb(CUC_RESUME, &p->scb->cmd_cuc);
1207 writew(make16(p->xmit_cmds[0]), &p->scb->cbl_offset);
1208 writeb(CUC_START, &p->scb->cmd_cuc);
1211 dev->trans_start = jiffies;
1214 wait_for_scb_cmd(dev);
1215 /* test it, because CU sometimes doesn't start immediately */
1216 if (readb(&p->scb->cus) & CU_ACTIVE)
1218 if (readw(&p->xmit_cmds[0]->cmd_status))
1221 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1224 next_nop = (p->nop_point + 1) & 0x1;
1225 writew(TBD_LAST | len, &p->xmit_buffs[0]->size);
1226 writew(make16(p->nop_cmds[next_nop]), &p->xmit_cmds[0]->cmd_link);
1227 writew(make16(p->nop_cmds[next_nop]),
1228 &p->nop_cmds[next_nop]->cmd_link);
1229 writew(0, &p->xmit_cmds[0]->cmd_status);
1230 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1232 writew(make16(p->xmit_cmds[0]), &p->nop_cmds[p->nop_point]->cmd_link);
1233 dev->trans_start = jiffies;
1234 p->nop_point = next_nop;
1238 writew(TBD_LAST | len, &p->xmit_buffs[p->xmit_count]->size);
1239 next_nop = p->xmit_count + 1
1240 if (next_nop == NUM_XMIT_BUFFS)
1242 writew(0, &p->xmit_cmds[p->xmit_count]->cmd_status);
1243 /* linkpointer of xmit-command already points to next nop cmd */
1244 writew(make16(p->nop_cmds[next_nop]),
1245 &p->nop_cmds[next_nop]->cmd_link);
1246 writew(0, &p->nop_cmds[next_nop]->cmd_status);
1247 writew(make16(p->xmit_cmds[p->xmit_count]),
1248 &p->nop_cmds[p->xmit_count]->cmd_link);
1249 dev->trans_start = jiffies;
1250 p->xmit_count = next_nop;
1252 unsigned long flags;
1253 spin_lock_irqsave(&p->spinlock);
1254 if (p->xmit_count != p->xmit_last)
1255 netif_wake_queue(dev);
1256 spin_unlock_irqrestore(&p->spinlock);
1263 /*******************************************
1264 * Someone wanna have the statistics
1267 static struct net_device_stats *ni52_get_stats(struct net_device *dev)
1269 struct priv *p = (struct priv *) dev->priv;
1270 unsigned short crc, aln, rsc, ovrn;
1272 /* Get error-statistics from the ni82586 */
1273 crc = readw(&p->scb->crc_errs);
1274 writew(0, &p->scb->crc_errs);
1275 aln = readw(&p->scb->aln_errs);
1276 writew(0, &p->scb->aln_errs);
1277 rsc = readw(&p->scb->rsc_errs);
1278 writew(0, &p->scb->rsc_errs);
1279 ovrn = readw(&p->scb->ovrn_errs);
1280 writew(0, &p->scb->ovrn_errs);
1282 p->stats.rx_crc_errors += crc;
1283 p->stats.rx_fifo_errors += ovrn;
1284 p->stats.rx_frame_errors += aln;
1285 p->stats.rx_dropped += rsc;
1290 /********************************************************
1294 static void set_multicast_list(struct net_device *dev)
1296 netif_stop_queue(dev);
1302 netif_wake_queue(dev);
1306 static struct net_device *dev_ni52;
1308 module_param(io, int, 0);
1309 module_param(irq, int, 0);
1310 module_param(memstart, long, 0);
1311 module_param(memend, long, 0);
1312 MODULE_PARM_DESC(io, "NI5210 I/O base address,required");
1313 MODULE_PARM_DESC(irq, "NI5210 IRQ number,required");
1314 MODULE_PARM_DESC(memstart, "NI5210 memory base address,required");
1315 MODULE_PARM_DESC(memend, "NI5210 memory end address,required");
1317 int __init init_module(void)
1319 if (io <= 0x0 || !memend || !memstart || irq < 2) {
1320 printk(KERN_ERR "ni52: Autoprobing not allowed for modules.\n");
1321 printk(KERN_ERR "ni52: Set symbols 'io' 'irq' 'memstart' and 'memend'\n");
1324 dev_ni52 = ni52_probe(-1);
1325 if (IS_ERR(dev_ni52))
1326 return PTR_ERR(dev_ni52);
1330 void __exit cleanup_module(void)
1332 unregister_netdev(dev_ni52);
1333 release_region(dev_ni52->base_addr, NI52_TOTAL_SIZE);
1334 free_netdev(dev_ni52);
1338 MODULE_LICENSE("GPL");
1341 * END: linux/drivers/net/ni52.c