1 /* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */
3 Written 1992-94 by Donald Becker.
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency. This software may be used and
7 distributed according to the terms of the GNU General Public License,
8 incorporated herein by reference.
10 The author may be reached as becker@scyld.com, or C/O
11 Scyld Computing Corporation
12 410 Severn Ave., Suite 210
16 This driver should work with the 3c503 and 3c503/16. It should be used
17 in shared memory mode for best performance, although it may also work
18 in programmed-I/O mode.
21 EtherLink II Technical Reference Manual,
22 EtherLink II/16 Technical Reference Manual Supplement,
23 3Com Corporation, 5400 Bayfront Plaza, Santa Clara CA 95052-8145
25 The Crynwr 3c503 packet driver.
29 Paul Gortmaker : add support for the 2nd 8kB of RAM on 16 bit cards.
30 Paul Gortmaker : multiple card support for module users.
31 rjohnson@analogic.com : Fix up PIO interface for efficient operation.
32 Jeff Garzik : ethtool support
36 #define DRV_NAME "3c503"
37 #define DRV_VERSION "1.10a"
38 #define DRV_RELDATE "11/17/2001"
41 static const char version[] =
42 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n";
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/errno.h>
47 #include <linux/string.h>
48 #include <linux/delay.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/init.h>
52 #include <linux/ethtool.h>
54 #include <asm/uaccess.h>
56 #include <asm/system.h>
57 #include <asm/byteorder.h>
63 static int el2_pio_probe(struct net_device *dev);
64 static int el2_probe1(struct net_device *dev, int ioaddr);
66 /* A zero-terminated list of I/O addresses to be probed in PIO mode. */
67 static unsigned int netcard_portlist[] __initdata =
68 { 0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0};
70 #define EL2_IO_EXTENT 16
72 static int el2_open(struct net_device *dev);
73 static int el2_close(struct net_device *dev);
74 static void el2_reset_8390(struct net_device *dev);
75 static void el2_init_card(struct net_device *dev);
76 static void el2_block_output(struct net_device *dev, int count,
77 const unsigned char *buf, int start_page);
78 static void el2_block_input(struct net_device *dev, int count, struct sk_buff *skb,
80 static void el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
82 static const struct ethtool_ops netdev_ethtool_ops;
85 /* This routine probes for a memory-mapped 3c503 board by looking for
86 the "location register" at the end of the jumpered boot PROM space.
87 This works even if a PROM isn't there.
89 If the ethercard isn't found there is an optional probe for
90 ethercard jumpered to programmed-I/O mode.
92 static int __init do_el2_probe(struct net_device *dev)
94 int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0};
95 int base_addr = dev->base_addr;
98 if (base_addr > 0x1ff) /* Check a single specified location. */
99 return el2_probe1(dev, base_addr);
100 else if (base_addr != 0) /* Don't probe at all. */
103 for (addr = addrs; *addr; addr++) {
104 void __iomem *p = ioremap(*addr, 1);
110 base_bits = readb(p);
112 i = ffs(base_bits) - 1;
113 if (i == -1 || base_bits != (1 << i))
115 if (el2_probe1(dev, netcard_portlist[i]) == 0)
119 #if ! defined(no_probe_nonshared_memory)
120 return el2_pio_probe(dev);
126 /* Try all of the locations that aren't obviously empty. This touches
127 a lot of locations, and is much riskier than the code above. */
129 el2_pio_probe(struct net_device *dev)
132 int base_addr = dev->base_addr;
135 if (base_addr > 0x1ff) /* Check a single specified location. */
136 return el2_probe1(dev, base_addr);
137 else if (base_addr != 0) /* Don't probe at all. */
140 for (i = 0; netcard_portlist[i]; i++) {
141 if (el2_probe1(dev, netcard_portlist[i]) == 0)
150 struct net_device * __init el2_probe(int unit)
152 struct net_device *dev = alloc_eip_netdev();
156 return ERR_PTR(-ENOMEM);
158 sprintf(dev->name, "eth%d", unit);
159 netdev_boot_setup_check(dev);
161 err = do_el2_probe(dev);
171 static const struct net_device_ops el2_netdev_ops = {
172 .ndo_open = el2_open,
173 .ndo_stop = el2_close,
175 .ndo_start_xmit = eip_start_xmit,
176 .ndo_tx_timeout = eip_tx_timeout,
177 .ndo_get_stats = eip_get_stats,
178 .ndo_set_multicast_list = eip_set_multicast_list,
179 .ndo_validate_addr = eth_validate_addr,
180 .ndo_change_mtu = eth_change_mtu,
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182 .ndo_poll_controller = eip_poll,
186 /* Probe for the Etherlink II card at I/O port base IOADDR,
187 returning non-zero on success. If found, set the station
188 address and memory parameters in DEVICE. */
190 el2_probe1(struct net_device *dev, int ioaddr)
192 int i, iobase_reg, membase_reg, saved_406, wordlength, retval;
193 static unsigned version_printed;
194 unsigned long vendor_id;
196 if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME))
199 if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) {
204 /* Reset and/or avoid any lurking NE2000 */
205 if (inb(ioaddr + 0x408) == 0xff) {
211 /* We verify that it's a 3C503 board by checking the first three octets
212 of its ethernet address. */
213 iobase_reg = inb(ioaddr+0x403);
214 membase_reg = inb(ioaddr+0x404);
215 /* ASIC location registers should be 0 or have only a single bit set. */
216 if ( (iobase_reg & (iobase_reg - 1))
217 || (membase_reg & (membase_reg - 1))) {
221 saved_406 = inb_p(ioaddr + 0x406);
222 outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */
223 outb_p(ECNTRL_THIN, ioaddr + 0x406);
224 /* Map the station addr PROM into the lower I/O ports. We now check
225 for both the old and new 3Com prefix */
226 outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406);
227 vendor_id = inb(ioaddr)*0x10000 + inb(ioaddr + 1)*0x100 + inb(ioaddr + 2);
228 if ((vendor_id != OLD_3COM_ID) && (vendor_id != NEW_3COM_ID)) {
229 /* Restore the register we frobbed. */
230 outb(saved_406, ioaddr + 0x406);
235 if (ei_debug && version_printed++ == 0)
238 dev->base_addr = ioaddr;
240 printk("%s: 3c503 at i/o base %#3x, node ", dev->name, ioaddr);
242 /* Retrieve and print the ethernet address. */
243 for (i = 0; i < 6; i++)
244 dev->dev_addr[i] = inb(ioaddr + i);
245 printk("%pM", dev->dev_addr);
247 /* Map the 8390 back into the window. */
248 outb(ECNTRL_THIN, ioaddr + 0x406);
250 /* Check for EL2/16 as described in tech. man. */
251 outb_p(E8390_PAGE0, ioaddr + E8390_CMD);
252 outb_p(0, ioaddr + EN0_DCFG);
253 outb_p(E8390_PAGE2, ioaddr + E8390_CMD);
254 wordlength = inb_p(ioaddr + EN0_DCFG) & ENDCFG_WTS;
255 outb_p(E8390_PAGE0, ioaddr + E8390_CMD);
257 /* Probe for, turn on and clear the board's shared memory. */
258 if (ei_debug > 2) printk(" memory jumpers %2.2x ", membase_reg);
259 outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */
261 /* This should be probed for (or set via an ioctl()) at run-time.
262 Right now we use a sleazy hack to pass in the interface number
263 at boot-time via the low bits of the mem_end field. That value is
264 unused, and the low bits would be discarded even if it was used. */
265 #if defined(EI8390_THICK) || defined(EL2_AUI)
266 ei_status.interface_num = 1;
268 ei_status.interface_num = dev->mem_end & 0xf;
270 printk(", using %sternal xcvr.\n", ei_status.interface_num == 0 ? "in" : "ex");
272 if ((membase_reg & 0xf0) == 0) {
274 ei_status.name = "3c503-PIO";
275 ei_status.mem = NULL;
277 dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) +
278 ((membase_reg & 0xA0) ? 0x4000 : 0);
279 #define EL2_MEMSIZE (EL2_MB1_STOP_PG - EL2_MB1_START_PG)*256
280 ei_status.mem = ioremap(dev->mem_start, EL2_MEMSIZE);
283 /* This has never found an error, but someone might care.
284 Note that it only tests the 2nd 8kB on 16kB 3c503/16
285 cards between card addr. 0x2000 and 0x3fff. */
286 { /* Check the card's memory. */
287 void __iomem *mem_base = ei_status.mem;
288 unsigned int test_val = 0xbbadf00d;
289 writel(0xba5eba5e, mem_base);
290 for (i = sizeof(test_val); i < EL2_MEMSIZE; i+=sizeof(test_val)) {
291 writel(test_val, mem_base + i);
292 if (readl(mem_base) != 0xba5eba5e
293 || readl(mem_base + i) != test_val) {
294 printk("3c503: memory failure or memory address conflict.\n");
296 ei_status.name = "3c503-PIO";
298 ei_status.mem = NULL;
301 test_val += 0x55555555;
302 writel(0, mem_base + i);
305 #endif /* EL2MEMTEST */
308 dev->mem_end = dev->mem_start + EL2_MEMSIZE;
310 if (wordlength) { /* No Tx pages to skip over to get to Rx */
312 ei_status.name = "3c503/16";
314 ei_status.priv = TX_PAGES * 256;
315 ei_status.name = "3c503";
320 Divide up the memory on the card. This is the same regardless of
321 whether shared-mem or PIO is used. For 16 bit cards (16kB RAM),
322 we use the entire 8k of bank1 for an Rx ring. We only use 3k
323 of the bank0 for 2 full size Tx packet slots. For 8 bit cards,
324 (8kB RAM) we use 3kB of bank1 for two Tx slots, and the remaining
325 5kB for an Rx ring. */
328 ei_status.tx_start_page = EL2_MB0_START_PG;
329 ei_status.rx_start_page = EL2_MB1_START_PG;
331 ei_status.tx_start_page = EL2_MB1_START_PG;
332 ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES;
335 /* Finish setting the board's parameters. */
336 ei_status.stop_page = EL2_MB1_STOP_PG;
337 ei_status.word16 = wordlength;
338 ei_status.reset_8390 = &el2_reset_8390;
339 ei_status.get_8390_hdr = &el2_get_8390_hdr;
340 ei_status.block_input = &el2_block_input;
341 ei_status.block_output = &el2_block_output;
345 else if (dev->irq > 5 && dev->irq != 9) {
346 printk("3c503: configured interrupt %d invalid, will use autoIRQ.\n",
351 ei_status.saved_irq = dev->irq;
353 dev->netdev_ops = &el2_netdev_ops;
354 dev->ethtool_ops = &netdev_ethtool_ops;
355 #ifdef CONFIG_NET_POLL_CONTROLLER
356 dev->poll_controller = eip_poll;
359 retval = register_netdev(dev);
364 printk("%s: %s - %dkB RAM, 8kB shared mem window at %#6lx-%#6lx.\n",
365 dev->name, ei_status.name, (wordlength+1)<<3,
366 dev->mem_start, dev->mem_end-1);
370 ei_status.tx_start_page = EL2_MB1_START_PG;
371 ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES;
372 printk("\n%s: %s, %dkB RAM, using programmed I/O (REJUMPER for SHARED MEMORY).\n",
373 dev->name, ei_status.name, (wordlength+1)<<3);
375 release_region(ioaddr + 0x400, 8);
378 release_region(ioaddr + 0x400, 8);
380 release_region(ioaddr, EL2_IO_EXTENT);
385 el2_open(struct net_device *dev)
387 int retval = -EAGAIN;
390 int irqlist[] = {5, 9, 3, 4, 0};
393 outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */
395 if (request_irq (*irqp, NULL, 0, "bogus", dev) != -EBUSY) {
396 /* Twinkle the interrupt, and check if it's seen. */
397 unsigned long cookie = probe_irq_on();
398 outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR);
399 outb_p(0x00, E33G_IDCFR);
400 if (*irqp == probe_irq_off(cookie) /* It's a good IRQ line! */
401 && ((retval = request_irq(dev->irq = *irqp,
402 eip_interrupt, 0, dev->name, dev)) == 0))
407 outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */
411 if ((retval = request_irq(dev->irq, eip_interrupt, 0, dev->name, dev))) {
422 el2_close(struct net_device *dev)
424 free_irq(dev->irq, dev);
425 dev->irq = ei_status.saved_irq;
426 outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */
432 /* This is called whenever we have a unrecoverable failure:
434 Bad ring buffer packet header
437 el2_reset_8390(struct net_device *dev)
440 printk("%s: Resetting the 3c503 board...", dev->name);
441 printk("%#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR),
442 E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR));
444 outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL);
446 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
448 if (ei_debug > 1) printk("done\n");
451 /* Initialize the 3c503 GA registers after a reset. */
453 el2_init_card(struct net_device *dev)
455 /* Unmap the station PROM and select the DIX or BNC connector. */
456 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
458 /* Set ASIC copy of rx's first and last+1 buffer pages */
459 /* These must be the same as in the 8390. */
460 outb(ei_status.rx_start_page, E33G_STARTPG);
461 outb(ei_status.stop_page, E33G_STOPPG);
463 /* Point the vector pointer registers somewhere ?harmless?. */
464 outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */
465 outb(0xff, E33G_VP1);
466 outb(0x00, E33G_VP0);
467 /* Turn off all interrupts until we're opened. */
468 outb_p(0x00, dev->base_addr + EN0_IMR);
469 /* Enable IRQs iff started. */
470 outb(EGACFR_NORM, E33G_GACFR);
472 /* Set the interrupt line. */
473 outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR);
474 outb_p((WRD_COUNT << 1), E33G_DRQCNT); /* Set burst size to 8 */
475 outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */
476 outb_p(0x00, E33G_DMAAL);
477 return; /* We always succeed */
481 * Either use the shared memory (if enabled on the board) or put the packet
482 * out through the ASIC FIFO.
485 el2_block_output(struct net_device *dev, int count,
486 const unsigned char *buf, int start_page)
488 unsigned short int *wrd;
489 int boguscount; /* timeout counter */
490 unsigned short word; /* temporary for better machine code */
491 void __iomem *base = ei_status.mem;
493 if (ei_status.word16) /* Tx packets go into bank 0 on EL2/16 card */
494 outb(EGACFR_RSEL|EGACFR_TCM, E33G_GACFR);
496 outb(EGACFR_NORM, E33G_GACFR);
498 if (base) { /* Shared memory transfer */
499 memcpy_toio(base + ((start_page - ei_status.tx_start_page) << 8),
501 outb(EGACFR_NORM, E33G_GACFR); /* Back to bank1 in case on bank0 */
506 * No shared memory, put the packet out the other way.
507 * Set up then start the internal memory transfer to Tx Start Page
510 word = (unsigned short)start_page;
511 outb(word&0xFF, E33G_DMAAH);
512 outb(word>>8, E33G_DMAAL);
514 outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT
515 | ECNTRL_START, E33G_CNTRL);
518 * Here I am going to write data to the FIFO as quickly as possible.
519 * Note that E33G_FIFOH is defined incorrectly. It is really
520 * E33G_FIFOL, the lowest port address for both the byte and
521 * word write. Variable 'count' is NOT checked. Caller must supply a
522 * valid count. Note that I may write a harmless extra byte to the
523 * 8390 if the byte-count was not even.
525 wrd = (unsigned short int *) buf;
526 count = (count + 1) >> 1;
530 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
534 printk("%s: FIFO blocked in el2_block_output.\n", dev->name);
539 if(count > WRD_COUNT)
541 outsw(E33G_FIFOH, wrd, WRD_COUNT);
547 outsw(E33G_FIFOH, wrd, count);
552 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
556 /* Read the 4 byte, page aligned 8390 specific header. */
558 el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
561 void __iomem *base = ei_status.mem;
564 if (base) { /* Use the shared memory. */
565 void __iomem *hdr_start = base + ((ring_page - EL2_MB1_START_PG)<<8);
566 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
567 hdr->count = le16_to_cpu(hdr->count);
572 * No shared memory, use programmed I/O.
575 word = (unsigned short)ring_page;
576 outb(word&0xFF, E33G_DMAAH);
577 outb(word>>8, E33G_DMAAL);
579 outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT
580 | ECNTRL_START, E33G_CNTRL);
582 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
586 printk("%s: FIFO blocked in el2_get_8390_hdr.\n", dev->name);
587 memset(hdr, 0x00, sizeof(struct e8390_pkt_hdr));
592 insw(E33G_FIFOH, hdr, (sizeof(struct e8390_pkt_hdr))>> 1);
594 outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
599 el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
602 void __iomem *base = ei_status.mem;
603 unsigned short int *buf;
606 /* Maybe enable shared memory just be to be safe... nahh.*/
607 if (base) { /* Use the shared memory. */
608 ring_offset -= (EL2_MB1_START_PG<<8);
609 if (ring_offset + count > EL2_MEMSIZE) {
610 /* We must wrap the input move. */
611 int semi_count = EL2_MEMSIZE - ring_offset;
612 memcpy_fromio(skb->data, base + ring_offset, semi_count);
614 memcpy_fromio(skb->data + semi_count, base + ei_status.priv, count);
616 memcpy_fromio(skb->data, base + ring_offset, count);
622 * No shared memory, use programmed I/O.
624 word = (unsigned short) ring_offset;
625 outb(word>>8, E33G_DMAAH);
626 outb(word&0xFF, E33G_DMAAL);
628 outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT
629 | ECNTRL_START, E33G_CNTRL);
632 * Here I also try to get data as fast as possible. I am betting that I
633 * can read one extra byte without clobbering anything in the kernel because
634 * this would only occur on an odd byte-count and allocation of skb->data
635 * is word-aligned. Variable 'count' is NOT checked. Caller must check
637 * [This is currently quite safe.... but if one day the 3c503 explodes
638 * you know where to come looking ;)]
641 buf = (unsigned short int *) skb->data;
642 count = (count + 1) >> 1;
646 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
650 printk("%s: FIFO blocked in el2_block_input.\n", dev->name);
655 if(count > WRD_COUNT)
657 insw(E33G_FIFOH, buf, WRD_COUNT);
663 insw(E33G_FIFOH, buf, count);
668 outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
673 static void netdev_get_drvinfo(struct net_device *dev,
674 struct ethtool_drvinfo *info)
676 strcpy(info->driver, DRV_NAME);
677 strcpy(info->version, DRV_VERSION);
678 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
681 static const struct ethtool_ops netdev_ethtool_ops = {
682 .get_drvinfo = netdev_get_drvinfo,
686 #define MAX_EL2_CARDS 4 /* Max number of EL2 cards per module */
688 static struct net_device *dev_el2[MAX_EL2_CARDS];
689 static int io[MAX_EL2_CARDS];
690 static int irq[MAX_EL2_CARDS];
691 static int xcvr[MAX_EL2_CARDS]; /* choose int. or ext. xcvr */
692 module_param_array(io, int, NULL, 0);
693 module_param_array(irq, int, NULL, 0);
694 module_param_array(xcvr, int, NULL, 0);
695 MODULE_PARM_DESC(io, "I/O base address(es)");
696 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
697 MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
698 MODULE_DESCRIPTION("3Com ISA EtherLink II, II/16 (3c503, 3c503/16) driver");
699 MODULE_LICENSE("GPL");
701 /* This is set up so that only a single autoprobe takes place per call.
702 ISA device autoprobes on a running machine are not recommended. */
706 struct net_device *dev;
707 int this_dev, found = 0;
709 for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) {
710 if (io[this_dev] == 0) {
711 if (this_dev != 0) break; /* only autoprobe 1st one */
712 printk(KERN_NOTICE "3c503.c: Presently autoprobing (not recommended) for a single card.\n");
714 dev = alloc_eip_netdev();
717 dev->irq = irq[this_dev];
718 dev->base_addr = io[this_dev];
719 dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
720 if (do_el2_probe(dev) == 0) {
721 dev_el2[found++] = dev;
725 printk(KERN_WARNING "3c503.c: No 3c503 card found (i/o = 0x%x).\n", io[this_dev]);
733 static void cleanup_card(struct net_device *dev)
735 /* NB: el2_close() handles free_irq */
736 release_region(dev->base_addr, EL2_IO_EXTENT);
738 iounmap(ei_status.mem);
746 for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) {
747 struct net_device *dev = dev_el2[this_dev];
749 unregister_netdev(dev);