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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */
2/*
3 Written 1992-94 by Donald Becker.
4
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.
9
10 The author may be reached as becker@scyld.com, or C/O
11 Scyld Computing Corporation
12 410 Severn Ave., Suite 210
13 Annapolis MD 21403
14
15
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.
19
20 Sources:
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
24
25 The Crynwr 3c503 packet driver.
26
27 Changelog:
28
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
33
34*/
35
36#define DRV_NAME "3c503"
37#define DRV_VERSION "1.10a"
38#define DRV_RELDATE "11/17/2001"
39
40
41static const char version[] =
42 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n";
43
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>
53
54#include <asm/uaccess.h>
55#include <asm/io.h>
56#include <asm/system.h>
57#include <asm/byteorder.h>
58
59#include "8390.h"
60#include "3c503.h"
61#define WRD_COUNT 4
62
63static int el2_pio_probe(struct net_device *dev);
64static int el2_probe1(struct net_device *dev, int ioaddr);
65
66/* A zero-terminated list of I/O addresses to be probed in PIO mode. */
67static unsigned int netcard_portlist[] __initdata =
68 { 0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0};
69
70#define EL2_IO_EXTENT 16
71
72static int el2_open(struct net_device *dev);
73static int el2_close(struct net_device *dev);
74static void el2_reset_8390(struct net_device *dev);
75static void el2_init_card(struct net_device *dev);
76static void el2_block_output(struct net_device *dev, int count,
77 const unsigned char *buf, int start_page);
78static void el2_block_input(struct net_device *dev, int count, struct sk_buff *skb,
79 int ring_offset);
80static void el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
81 int ring_page);
Jeff Garzik7282d492006-09-13 14:30:00 -040082static const struct ethtool_ops netdev_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Jeff Garzik6aa20a22006-09-13 13:24:59 -040084
Linus Torvalds1da177e2005-04-16 15:20:36 -070085/* 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.
88
89 If the ethercard isn't found there is an optional probe for
90 ethercard jumpered to programmed-I/O mode.
91 */
92static int __init do_el2_probe(struct net_device *dev)
93{
94 int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0};
95 int base_addr = dev->base_addr;
96 int irq = dev->irq;
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 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. */
101 return -ENXIO;
102
103 for (addr = addrs; *addr; addr++) {
104 void __iomem *p = ioremap(*addr, 1);
105 unsigned base_bits;
106 int i;
107
108 if (!p)
109 continue;
110 base_bits = readb(p);
111 iounmap(p);
112 i = ffs(base_bits) - 1;
113 if (i == -1 || base_bits != (1 << i))
114 continue;
115 if (el2_probe1(dev, netcard_portlist[i]) == 0)
116 return 0;
117 dev->irq = irq;
118 }
119#if ! defined(no_probe_nonshared_memory)
120 return el2_pio_probe(dev);
121#else
122 return -ENODEV;
123#endif
124}
125
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. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400128static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129el2_pio_probe(struct net_device *dev)
130{
131 int i;
132 int base_addr = dev->base_addr;
133 int irq = dev->irq;
134
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. */
138 return -ENXIO;
139
140 for (i = 0; netcard_portlist[i]; i++) {
141 if (el2_probe1(dev, netcard_portlist[i]) == 0)
142 return 0;
143 dev->irq = irq;
144 }
145
146 return -ENODEV;
147}
148
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149#ifndef MODULE
150struct net_device * __init el2_probe(int unit)
151{
152 struct net_device *dev = alloc_ei_netdev();
153 int err;
154
155 if (!dev)
156 return ERR_PTR(-ENOMEM);
157
158 sprintf(dev->name, "eth%d", unit);
159 netdev_boot_setup_check(dev);
160
161 err = do_el2_probe(dev);
162 if (err)
163 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165out:
166 free_netdev(dev);
167 return ERR_PTR(err);
168}
169#endif
170
171/* Probe for the Etherlink II card at I/O port base IOADDR,
172 returning non-zero on success. If found, set the station
173 address and memory parameters in DEVICE. */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400174static int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175el2_probe1(struct net_device *dev, int ioaddr)
176{
177 int i, iobase_reg, membase_reg, saved_406, wordlength, retval;
178 static unsigned version_printed;
179 unsigned long vendor_id;
Joe Perches0795af52007-10-03 17:59:30 -0700180 DECLARE_MAC_BUF(mac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
182 if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME))
183 return -EBUSY;
184
185 if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) {
186 retval = -EBUSY;
187 goto out;
188 }
189
190 /* Reset and/or avoid any lurking NE2000 */
191 if (inb(ioaddr + 0x408) == 0xff) {
192 mdelay(1);
193 retval = -ENODEV;
194 goto out1;
195 }
196
197 /* We verify that it's a 3C503 board by checking the first three octets
198 of its ethernet address. */
199 iobase_reg = inb(ioaddr+0x403);
200 membase_reg = inb(ioaddr+0x404);
201 /* ASIC location registers should be 0 or have only a single bit set. */
202 if ( (iobase_reg & (iobase_reg - 1))
203 || (membase_reg & (membase_reg - 1))) {
204 retval = -ENODEV;
205 goto out1;
206 }
207 saved_406 = inb_p(ioaddr + 0x406);
208 outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr + 0x406); /* Reset it... */
209 outb_p(ECNTRL_THIN, ioaddr + 0x406);
210 /* Map the station addr PROM into the lower I/O ports. We now check
211 for both the old and new 3Com prefix */
212 outb(ECNTRL_SAPROM|ECNTRL_THIN, ioaddr + 0x406);
213 vendor_id = inb(ioaddr)*0x10000 + inb(ioaddr + 1)*0x100 + inb(ioaddr + 2);
214 if ((vendor_id != OLD_3COM_ID) && (vendor_id != NEW_3COM_ID)) {
215 /* Restore the register we frobbed. */
216 outb(saved_406, ioaddr + 0x406);
217 retval = -ENODEV;
218 goto out1;
219 }
220
221 if (ei_debug && version_printed++ == 0)
222 printk(version);
223
224 dev->base_addr = ioaddr;
225
226 printk("%s: 3c503 at i/o base %#3x, node ", dev->name, ioaddr);
227
228 /* Retrieve and print the ethernet address. */
229 for (i = 0; i < 6; i++)
Joe Perches0795af52007-10-03 17:59:30 -0700230 dev->dev_addr[i] = inb(ioaddr + i);
231 printk("%s", print_mac(mac, dev->dev_addr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 /* Map the 8390 back into the window. */
234 outb(ECNTRL_THIN, ioaddr + 0x406);
235
236 /* Check for EL2/16 as described in tech. man. */
237 outb_p(E8390_PAGE0, ioaddr + E8390_CMD);
238 outb_p(0, ioaddr + EN0_DCFG);
239 outb_p(E8390_PAGE2, ioaddr + E8390_CMD);
240 wordlength = inb_p(ioaddr + EN0_DCFG) & ENDCFG_WTS;
241 outb_p(E8390_PAGE0, ioaddr + E8390_CMD);
242
243 /* Probe for, turn on and clear the board's shared memory. */
244 if (ei_debug > 2) printk(" memory jumpers %2.2x ", membase_reg);
245 outb(EGACFR_NORM, ioaddr + 0x405); /* Enable RAM */
246
247 /* This should be probed for (or set via an ioctl()) at run-time.
248 Right now we use a sleazy hack to pass in the interface number
249 at boot-time via the low bits of the mem_end field. That value is
250 unused, and the low bits would be discarded even if it was used. */
251#if defined(EI8390_THICK) || defined(EL2_AUI)
252 ei_status.interface_num = 1;
253#else
254 ei_status.interface_num = dev->mem_end & 0xf;
255#endif
256 printk(", using %sternal xcvr.\n", ei_status.interface_num == 0 ? "in" : "ex");
257
258 if ((membase_reg & 0xf0) == 0) {
259 dev->mem_start = 0;
260 ei_status.name = "3c503-PIO";
261 ei_status.mem = NULL;
262 } else {
263 dev->mem_start = ((membase_reg & 0xc0) ? 0xD8000 : 0xC8000) +
264 ((membase_reg & 0xA0) ? 0x4000 : 0);
265#define EL2_MEMSIZE (EL2_MB1_STOP_PG - EL2_MB1_START_PG)*256
266 ei_status.mem = ioremap(dev->mem_start, EL2_MEMSIZE);
267
268#ifdef EL2MEMTEST
269 /* This has never found an error, but someone might care.
270 Note that it only tests the 2nd 8kB on 16kB 3c503/16
271 cards between card addr. 0x2000 and 0x3fff. */
272 { /* Check the card's memory. */
273 void __iomem *mem_base = ei_status.mem;
274 unsigned int test_val = 0xbbadf00d;
275 writel(0xba5eba5e, mem_base);
276 for (i = sizeof(test_val); i < EL2_MEMSIZE; i+=sizeof(test_val)) {
277 writel(test_val, mem_base + i);
278 if (readl(mem_base) != 0xba5eba5e
279 || readl(mem_base + i) != test_val) {
280 printk("3c503: memory failure or memory address conflict.\n");
281 dev->mem_start = 0;
282 ei_status.name = "3c503-PIO";
283 iounmap(mem_base);
284 ei_status.mem = NULL;
285 break;
286 }
287 test_val += 0x55555555;
288 writel(0, mem_base + i);
289 }
290 }
291#endif /* EL2MEMTEST */
292
293 if (dev->mem_start)
294 dev->mem_end = dev->mem_start + EL2_MEMSIZE;
295
296 if (wordlength) { /* No Tx pages to skip over to get to Rx */
297 ei_status.priv = 0;
298 ei_status.name = "3c503/16";
299 } else {
300 ei_status.priv = TX_PAGES * 256;
301 ei_status.name = "3c503";
302 }
303 }
304
305 /*
306 Divide up the memory on the card. This is the same regardless of
307 whether shared-mem or PIO is used. For 16 bit cards (16kB RAM),
308 we use the entire 8k of bank1 for an Rx ring. We only use 3k
309 of the bank0 for 2 full size Tx packet slots. For 8 bit cards,
310 (8kB RAM) we use 3kB of bank1 for two Tx slots, and the remaining
311 5kB for an Rx ring. */
312
313 if (wordlength) {
314 ei_status.tx_start_page = EL2_MB0_START_PG;
315 ei_status.rx_start_page = EL2_MB1_START_PG;
316 } else {
317 ei_status.tx_start_page = EL2_MB1_START_PG;
318 ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES;
319 }
320
321 /* Finish setting the board's parameters. */
322 ei_status.stop_page = EL2_MB1_STOP_PG;
323 ei_status.word16 = wordlength;
324 ei_status.reset_8390 = &el2_reset_8390;
325 ei_status.get_8390_hdr = &el2_get_8390_hdr;
326 ei_status.block_input = &el2_block_input;
327 ei_status.block_output = &el2_block_output;
328
329 if (dev->irq == 2)
330 dev->irq = 9;
331 else if (dev->irq > 5 && dev->irq != 9) {
332 printk("3c503: configured interrupt %d invalid, will use autoIRQ.\n",
333 dev->irq);
334 dev->irq = 0;
335 }
336
337 ei_status.saved_irq = dev->irq;
338
339 dev->open = &el2_open;
340 dev->stop = &el2_close;
341 dev->ethtool_ops = &netdev_ethtool_ops;
342#ifdef CONFIG_NET_POLL_CONTROLLER
343 dev->poll_controller = ei_poll;
344#endif
345
b1fc5502005-05-12 20:11:55 -0400346 retval = register_netdev(dev);
347 if (retval)
348 goto out1;
349
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 if (dev->mem_start)
351 printk("%s: %s - %dkB RAM, 8kB shared mem window at %#6lx-%#6lx.\n",
352 dev->name, ei_status.name, (wordlength+1)<<3,
353 dev->mem_start, dev->mem_end-1);
354
355 else
356 {
357 ei_status.tx_start_page = EL2_MB1_START_PG;
358 ei_status.rx_start_page = EL2_MB1_START_PG + TX_PAGES;
359 printk("\n%s: %s, %dkB RAM, using programmed I/O (REJUMPER for SHARED MEMORY).\n",
360 dev->name, ei_status.name, (wordlength+1)<<3);
361 }
362 release_region(ioaddr + 0x400, 8);
363 return 0;
364out1:
365 release_region(ioaddr + 0x400, 8);
366out:
367 release_region(ioaddr, EL2_IO_EXTENT);
368 return retval;
369}
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400370
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371static int
372el2_open(struct net_device *dev)
373{
374 int retval = -EAGAIN;
375
376 if (dev->irq < 2) {
377 int irqlist[] = {5, 9, 3, 4, 0};
378 int *irqp = irqlist;
379
380 outb(EGACFR_NORM, E33G_GACFR); /* Enable RAM and interrupts. */
381 do {
382 if (request_irq (*irqp, NULL, 0, "bogus", dev) != -EBUSY) {
383 /* Twinkle the interrupt, and check if it's seen. */
384 unsigned long cookie = probe_irq_on();
385 outb_p(0x04 << ((*irqp == 9) ? 2 : *irqp), E33G_IDCFR);
386 outb_p(0x00, E33G_IDCFR);
387 if (*irqp == probe_irq_off(cookie) /* It's a good IRQ line! */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400388 && ((retval = request_irq(dev->irq = *irqp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 ei_interrupt, 0, dev->name, dev)) == 0))
390 break;
391 }
392 } while (*++irqp);
393 if (*irqp == 0) {
394 outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */
395 return retval;
396 }
397 } else {
398 if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev))) {
399 return retval;
400 }
401 }
402
403 el2_init_card(dev);
404 ei_open(dev);
405 return 0;
406}
407
408static int
409el2_close(struct net_device *dev)
410{
411 free_irq(dev->irq, dev);
412 dev->irq = ei_status.saved_irq;
413 outb(EGACFR_IRQOFF, E33G_GACFR); /* disable interrupts. */
414
415 ei_close(dev);
416 return 0;
417}
418
419/* This is called whenever we have a unrecoverable failure:
420 transmit timeout
421 Bad ring buffer packet header
422 */
423static void
424el2_reset_8390(struct net_device *dev)
425{
426 if (ei_debug > 1) {
427 printk("%s: Resetting the 3c503 board...", dev->name);
428 printk("%#lx=%#02x %#lx=%#02x %#lx=%#02x...", E33G_IDCFR, inb(E33G_IDCFR),
429 E33G_CNTRL, inb(E33G_CNTRL), E33G_GACFR, inb(E33G_GACFR));
430 }
431 outb_p(ECNTRL_RESET|ECNTRL_THIN, E33G_CNTRL);
432 ei_status.txing = 0;
433 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
434 el2_init_card(dev);
435 if (ei_debug > 1) printk("done\n");
436}
437
438/* Initialize the 3c503 GA registers after a reset. */
439static void
440el2_init_card(struct net_device *dev)
441{
442 /* Unmap the station PROM and select the DIX or BNC connector. */
443 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
444
445 /* Set ASIC copy of rx's first and last+1 buffer pages */
446 /* These must be the same as in the 8390. */
447 outb(ei_status.rx_start_page, E33G_STARTPG);
448 outb(ei_status.stop_page, E33G_STOPPG);
449
450 /* Point the vector pointer registers somewhere ?harmless?. */
451 outb(0xff, E33G_VP2); /* Point at the ROM restart location 0xffff0 */
452 outb(0xff, E33G_VP1);
453 outb(0x00, E33G_VP0);
454 /* Turn off all interrupts until we're opened. */
455 outb_p(0x00, dev->base_addr + EN0_IMR);
456 /* Enable IRQs iff started. */
457 outb(EGACFR_NORM, E33G_GACFR);
458
459 /* Set the interrupt line. */
460 outb_p((0x04 << (dev->irq == 9 ? 2 : dev->irq)), E33G_IDCFR);
461 outb_p((WRD_COUNT << 1), E33G_DRQCNT); /* Set burst size to 8 */
462 outb_p(0x20, E33G_DMAAH); /* Put a valid addr in the GA DMA */
463 outb_p(0x00, E33G_DMAAL);
464 return; /* We always succeed */
465}
466
467/*
468 * Either use the shared memory (if enabled on the board) or put the packet
469 * out through the ASIC FIFO.
470 */
471static void
472el2_block_output(struct net_device *dev, int count,
473 const unsigned char *buf, int start_page)
474{
475 unsigned short int *wrd;
476 int boguscount; /* timeout counter */
477 unsigned short word; /* temporary for better machine code */
478 void __iomem *base = ei_status.mem;
479
480 if (ei_status.word16) /* Tx packets go into bank 0 on EL2/16 card */
481 outb(EGACFR_RSEL|EGACFR_TCM, E33G_GACFR);
482 else
483 outb(EGACFR_NORM, E33G_GACFR);
484
485 if (base) { /* Shared memory transfer */
486 memcpy_toio(base + ((start_page - ei_status.tx_start_page) << 8),
487 buf, count);
488 outb(EGACFR_NORM, E33G_GACFR); /* Back to bank1 in case on bank0 */
489 return;
490 }
491
492/*
493 * No shared memory, put the packet out the other way.
494 * Set up then start the internal memory transfer to Tx Start Page
495 */
496
497 word = (unsigned short)start_page;
498 outb(word&0xFF, E33G_DMAAH);
499 outb(word>>8, E33G_DMAAL);
500
501 outb_p((ei_status.interface_num ? ECNTRL_AUI : ECNTRL_THIN ) | ECNTRL_OUTPUT
502 | ECNTRL_START, E33G_CNTRL);
503
504/*
505 * Here I am going to write data to the FIFO as quickly as possible.
506 * Note that E33G_FIFOH is defined incorrectly. It is really
507 * E33G_FIFOL, the lowest port address for both the byte and
508 * word write. Variable 'count' is NOT checked. Caller must supply a
509 * valid count. Note that I may write a harmless extra byte to the
510 * 8390 if the byte-count was not even.
511 */
512 wrd = (unsigned short int *) buf;
513 count = (count + 1) >> 1;
514 for(;;)
515 {
516 boguscount = 0x1000;
517 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
518 {
519 if(!boguscount--)
520 {
521 printk("%s: FIFO blocked in el2_block_output.\n", dev->name);
522 el2_reset_8390(dev);
523 goto blocked;
524 }
525 }
526 if(count > WRD_COUNT)
527 {
528 outsw(E33G_FIFOH, wrd, WRD_COUNT);
529 wrd += WRD_COUNT;
530 count -= WRD_COUNT;
531 }
532 else
533 {
534 outsw(E33G_FIFOH, wrd, count);
535 break;
536 }
537 }
538 blocked:;
539 outb_p(ei_status.interface_num==0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
540 return;
541}
542
543/* Read the 4 byte, page aligned 8390 specific header. */
544static void
545el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
546{
547 int boguscount;
548 void __iomem *base = ei_status.mem;
549 unsigned short word;
550
551 if (base) { /* Use the shared memory. */
552 void __iomem *hdr_start = base + ((ring_page - EL2_MB1_START_PG)<<8);
553 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
554 hdr->count = le16_to_cpu(hdr->count);
555 return;
556 }
557
558/*
559 * No shared memory, use programmed I/O.
560 */
561
562 word = (unsigned short)ring_page;
563 outb(word&0xFF, E33G_DMAAH);
564 outb(word>>8, E33G_DMAAL);
565
566 outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT
567 | ECNTRL_START, E33G_CNTRL);
568 boguscount = 0x1000;
569 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
570 {
571 if(!boguscount--)
572 {
573 printk("%s: FIFO blocked in el2_get_8390_hdr.\n", dev->name);
574 memset(hdr, 0x00, sizeof(struct e8390_pkt_hdr));
575 el2_reset_8390(dev);
576 goto blocked;
577 }
578 }
579 insw(E33G_FIFOH, hdr, (sizeof(struct e8390_pkt_hdr))>> 1);
580 blocked:;
581 outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
582}
583
584
585static void
586el2_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
587{
588 int boguscount = 0;
589 void __iomem *base = ei_status.mem;
590 unsigned short int *buf;
591 unsigned short word;
592
593 /* Maybe enable shared memory just be to be safe... nahh.*/
594 if (base) { /* Use the shared memory. */
595 ring_offset -= (EL2_MB1_START_PG<<8);
596 if (ring_offset + count > EL2_MEMSIZE) {
597 /* We must wrap the input move. */
598 int semi_count = EL2_MEMSIZE - ring_offset;
599 memcpy_fromio(skb->data, base + ring_offset, semi_count);
600 count -= semi_count;
601 memcpy_fromio(skb->data + semi_count, base + ei_status.priv, count);
602 } else {
Al Viro4ec03112007-02-09 16:38:30 +0000603 memcpy_fromio(skb->data, base + ring_offset, count);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 }
605 return;
606 }
607
608/*
609 * No shared memory, use programmed I/O.
610 */
611 word = (unsigned short) ring_offset;
612 outb(word>>8, E33G_DMAAH);
613 outb(word&0xFF, E33G_DMAAL);
614
615 outb_p((ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI) | ECNTRL_INPUT
616 | ECNTRL_START, E33G_CNTRL);
617
618/*
619 * Here I also try to get data as fast as possible. I am betting that I
620 * can read one extra byte without clobbering anything in the kernel because
621 * this would only occur on an odd byte-count and allocation of skb->data
622 * is word-aligned. Variable 'count' is NOT checked. Caller must check
623 * for a valid count.
624 * [This is currently quite safe.... but if one day the 3c503 explodes
625 * you know where to come looking ;)]
626 */
627
628 buf = (unsigned short int *) skb->data;
629 count = (count + 1) >> 1;
630 for(;;)
631 {
632 boguscount = 0x1000;
633 while ((inb(E33G_STATUS) & ESTAT_DPRDY) == 0)
634 {
635 if(!boguscount--)
636 {
637 printk("%s: FIFO blocked in el2_block_input.\n", dev->name);
638 el2_reset_8390(dev);
639 goto blocked;
640 }
641 }
642 if(count > WRD_COUNT)
643 {
644 insw(E33G_FIFOH, buf, WRD_COUNT);
645 buf += WRD_COUNT;
646 count -= WRD_COUNT;
647 }
648 else
649 {
650 insw(E33G_FIFOH, buf, count);
651 break;
652 }
653 }
654 blocked:;
655 outb_p(ei_status.interface_num == 0 ? ECNTRL_THIN : ECNTRL_AUI, E33G_CNTRL);
656 return;
657}
658
659
660static void netdev_get_drvinfo(struct net_device *dev,
661 struct ethtool_drvinfo *info)
662{
663 strcpy(info->driver, DRV_NAME);
664 strcpy(info->version, DRV_VERSION);
665 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
666}
667
Jeff Garzik7282d492006-09-13 14:30:00 -0400668static const struct ethtool_ops netdev_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 .get_drvinfo = netdev_get_drvinfo,
670};
671
672#ifdef MODULE
673#define MAX_EL2_CARDS 4 /* Max number of EL2 cards per module */
674
675static struct net_device *dev_el2[MAX_EL2_CARDS];
676static int io[MAX_EL2_CARDS];
677static int irq[MAX_EL2_CARDS];
678static int xcvr[MAX_EL2_CARDS]; /* choose int. or ext. xcvr */
679module_param_array(io, int, NULL, 0);
680module_param_array(irq, int, NULL, 0);
681module_param_array(xcvr, int, NULL, 0);
682MODULE_PARM_DESC(io, "I/O base address(es)");
683MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
684MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
685MODULE_DESCRIPTION("3Com ISA EtherLink II, II/16 (3c503, 3c503/16) driver");
686MODULE_LICENSE("GPL");
687
688/* This is set up so that only a single autoprobe takes place per call.
689ISA device autoprobes on a running machine are not recommended. */
Randy Dunlap96e672c2006-06-10 13:33:48 -0700690int __init
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691init_module(void)
692{
693 struct net_device *dev;
694 int this_dev, found = 0;
695
696 for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) {
697 if (io[this_dev] == 0) {
698 if (this_dev != 0) break; /* only autoprobe 1st one */
699 printk(KERN_NOTICE "3c503.c: Presently autoprobing (not recommended) for a single card.\n");
700 }
701 dev = alloc_ei_netdev();
702 if (!dev)
703 break;
704 dev->irq = irq[this_dev];
705 dev->base_addr = io[this_dev];
706 dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
707 if (do_el2_probe(dev) == 0) {
b1fc5502005-05-12 20:11:55 -0400708 dev_el2[found++] = dev;
709 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 }
711 free_netdev(dev);
712 printk(KERN_WARNING "3c503.c: No 3c503 card found (i/o = 0x%x).\n", io[this_dev]);
713 break;
714 }
715 if (found)
716 return 0;
717 return -ENXIO;
718}
719
Denis Vlasenko64916f12006-01-05 22:45:47 -0800720static void cleanup_card(struct net_device *dev)
721{
722 /* NB: el2_close() handles free_irq */
723 release_region(dev->base_addr, EL2_IO_EXTENT);
724 if (ei_status.mem)
725 iounmap(ei_status.mem);
726}
727
Al Viroafc8eb42006-06-14 18:50:53 -0400728void __exit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729cleanup_module(void)
730{
731 int this_dev;
732
733 for (this_dev = 0; this_dev < MAX_EL2_CARDS; this_dev++) {
734 struct net_device *dev = dev_el2[this_dev];
735 if (dev) {
736 unregister_netdev(dev);
737 cleanup_card(dev);
738 free_netdev(dev);
739 }
740 }
741}
742#endif /* MODULE */