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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / smc-ultra.c
blobd70bc979534669ba60eb49109ad73797bcb00cdd
1 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
2 /*
3 This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
4
5 Written 1993-1998 by Donald Becker.
6
7 Copyright 1993 United States Government as represented by the
8 Director, National Security Agency.
9
10 This software may be used and distributed according to the terms
11 of the GNU General Public License, incorporated herein by reference.
12
13 The author may be reached as becker@scyld.com, or C/O
14 Scyld Computing Corporation
15 410 Severn Ave., Suite 210
16 Annapolis MD 21403
17
18 This driver uses the cards in the 8390-compatible mode.
19 Most of the run-time complexity is handled by the generic code in
20 8390.c. The code in this file is responsible for
21
22 ultra_probe() Detecting and initializing the card.
23 ultra_probe1()
24 ultra_probe_isapnp()
25
26 ultra_open() The card-specific details of starting, stopping
27 ultra_reset_8390() and resetting the 8390 NIC core.
28 ultra_close()
29
30 ultra_block_input() Routines for reading and writing blocks of
31 ultra_block_output() packet buffer memory.
32 ultra_pio_input()
33 ultra_pio_output()
34
35 This driver enables the shared memory only when doing the actual data
36 transfers to avoid a bug in early version of the card that corrupted
37 data transferred by a AHA1542.
38
39 This driver now supports the programmed-I/O (PIO) data transfer mode of
40 the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
41 That support (if available) is in smc-ez.c.
42
43 Changelog:
44
45 Paul Gortmaker : multiple card support for module users.
46 Donald Becker : 4/17/96 PIO support, minor potential problems avoided.
47 Donald Becker : 6/6/96 correctly set auto-wrap bit.
48 Alexander Sotirov : 1/20/01 Added support for ISAPnP cards
49
50 Note about the ISA PnP support:
51
52 This driver can not autoprobe for more than one SMC EtherEZ PnP card.
53 You have to configure the second card manually through the /proc/isapnp
54 interface and then load the module with an explicit io=0x___ option.
55 */
56
57 static const char version[] =
58 "smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
59
60 #include <linux/module.h>
61 #include <linux/kernel.h>
62 #include <linux/errno.h>
63 #include <linux/string.h>
64 #include <linux/init.h>
65 #include <linux/isapnp.h>
66 #include <linux/netdevice.h>
67 #include <linux/etherdevice.h>
68
69 #include <asm/io.h>
70 #include <asm/irq.h>
71 #include <asm/system.h>
72
73 #include "8390.h"
74
75 #define DRV_NAME "smc-ultra"
76
77 /* A zero-terminated list of I/O addresses to be probed. */
78 static unsigned int ultra_portlist[] __initdata =
79 {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
80
81 static int ultra_probe1(struct net_device *dev, int ioaddr);
82
83 #ifdef __ISAPNP__
84 static int ultra_probe_isapnp(struct net_device *dev);
85 #endif
86
87 static int ultra_open(struct net_device *dev);
88 static void ultra_reset_8390(struct net_device *dev);
89 static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
90 int ring_page);
91 static void ultra_block_input(struct net_device *dev, int count,
92 struct sk_buff *skb, int ring_offset);
93 static void ultra_block_output(struct net_device *dev, int count,
94 const unsigned char *buf, const int start_page);
95 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
96 int ring_page);
97 static void ultra_pio_input(struct net_device *dev, int count,
98 struct sk_buff *skb, int ring_offset);
99 static void ultra_pio_output(struct net_device *dev, int count,
100 const unsigned char *buf, const int start_page);
101 static int ultra_close_card(struct net_device *dev);
102
103 #ifdef __ISAPNP__
104 static struct isapnp_device_id ultra_device_ids[] __initdata = {
105 { ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
106 ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),
107 (long) "SMC EtherEZ (8416)" },
108 { } /* terminate list */
109 };
110
111 MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
112 #endif
113
114
115 #define START_PG 0x00 /* First page of TX buffer */
116
117 #define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
118 #define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
119 #define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
120 #define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */
121 #define IOPA 0x07 /* I/O Pipe Address for PIO operation. */
122 #define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
123 #define ULTRA_IO_EXTENT 32
124 #define EN0_ERWCNT 0x08 /* Early receive warning count. */
125
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 static void ultra_poll(struct net_device *dev)
128 {
129 disable_irq(dev->irq);
130 ei_interrupt(dev->irq, dev);
131 enable_irq(dev->irq);
132 }
133 #endif
134 /* Probe for the Ultra. This looks like a 8013 with the station
135 address PROM at I/O ports <base>+8 to <base>+13, with a checksum
136 following.
137 */
138
139 static int __init do_ultra_probe(struct net_device *dev)
140 {
141 int i;
142 int base_addr = dev->base_addr;
143 int irq = dev->irq;
144
145 SET_MODULE_OWNER(dev);
146
147 #ifdef CONFIG_NET_POLL_CONTROLLER
148 dev->poll_controller = &ultra_poll;
149 #endif
150 if (base_addr > 0x1ff) /* Check a single specified location. */
151 return ultra_probe1(dev, base_addr);
152 else if (base_addr != 0) /* Don't probe at all. */
153 return -ENXIO;
154
155 #ifdef __ISAPNP__
156 /* Look for any installed ISAPnP cards */
157 if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
158 return 0;
159 #endif
160
161 for (i = 0; ultra_portlist[i]; i++) {
162 dev->irq = irq;
163 if (ultra_probe1(dev, ultra_portlist[i]) == 0)
164 return 0;
165 }
166
167 return -ENODEV;
168 }
169
170 #ifndef MODULE
171 struct net_device * __init ultra_probe(int unit)
172 {
173 struct net_device *dev = alloc_ei_netdev();
174 int err;
175
176 if (!dev)
177 return ERR_PTR(-ENOMEM);
178
179 sprintf(dev->name, "eth%d", unit);
180 netdev_boot_setup_check(dev);
181
182 err = do_ultra_probe(dev);
183 if (err)
184 goto out;
185 return dev;
186 out:
187 free_netdev(dev);
188 return ERR_PTR(err);
189 }
190 #endif
191
192 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
193 {
194 int i, retval;
195 int checksum = 0;
196 const char *model_name;
197 unsigned char eeprom_irq = 0;
198 static unsigned version_printed;
199 /* Values from various config regs. */
200 unsigned char num_pages, irqreg, addr, piomode;
201 unsigned char idreg = inb(ioaddr + 7);
202 unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
203
204 if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
205 return -EBUSY;
206
207 /* Check the ID nibble. */
208 if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
209 && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
210 retval = -ENODEV;
211 goto out;
212 }
213
214 /* Select the station address register set. */
215 outb(reg4, ioaddr + 4);
216
217 for (i = 0; i < 8; i++)
218 checksum += inb(ioaddr + 8 + i);
219 if ((checksum & 0xff) != 0xFF) {
220 retval = -ENODEV;
221 goto out;
222 }
223
224 if (ei_debug && version_printed++ == 0)
225 printk(version);
226
227 model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
228
229 printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
230
231 for (i = 0; i < 6; i++)
232 printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
233
234 /* Switch from the station address to the alternate register set and
235 read the useful registers there. */
236 outb(0x80 | reg4, ioaddr + 4);
237
238 /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
239 outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
240 piomode = inb(ioaddr + 0x8);
241 addr = inb(ioaddr + 0xb);
242 irqreg = inb(ioaddr + 0xd);
243
244 /* Switch back to the station address register set so that the MS-DOS driver
245 can find the card after a warm boot. */
246 outb(reg4, ioaddr + 4);
247
248 if (dev->irq < 2) {
249 unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
250 int irq;
251
252 /* The IRQ bits are split. */
253 irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
254
255 if (irq == 0) {
256 printk(", failed to detect IRQ line.\n");
257 retval = -EAGAIN;
258 goto out;
259 }
260 dev->irq = irq;
261 eeprom_irq = 1;
262 }
263
264 /* The 8390 isn't at the base address, so fake the offset */
265 dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
266
267 {
268 int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
269 short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
270
271 dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
272 num_pages = num_pages_tbl[(addr >> 4) & 3];
273 }
274
275 ei_status.name = model_name;
276 ei_status.word16 = 1;
277 ei_status.tx_start_page = START_PG;
278 ei_status.rx_start_page = START_PG + TX_PAGES;
279 ei_status.stop_page = num_pages;
280
281 ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
282 if (!ei_status.mem) {
283 printk(", failed to ioremap.\n");
284 retval = -ENOMEM;
285 goto out;
286 }
287
288 dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
289
290 if (piomode) {
291 printk(",%s IRQ %d programmed-I/O mode.\n",
292 eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
293 ei_status.block_input = &ultra_pio_input;
294 ei_status.block_output = &ultra_pio_output;
295 ei_status.get_8390_hdr = &ultra_pio_get_hdr;
296 } else {
297 printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
298 dev->irq, dev->mem_start, dev->mem_end-1);
299 ei_status.block_input = &ultra_block_input;
300 ei_status.block_output = &ultra_block_output;
301 ei_status.get_8390_hdr = &ultra_get_8390_hdr;
302 }
303 ei_status.reset_8390 = &ultra_reset_8390;
304 dev->open = &ultra_open;
305 dev->stop = &ultra_close_card;
306 #ifdef CONFIG_NET_POLL_CONTROLLER
307 dev->poll_controller = ei_poll;
308 #endif
309 NS8390_init(dev, 0);
310
311 retval = register_netdev(dev);
312 if (retval)
313 goto out;
314 return 0;
315 out:
316 release_region(ioaddr, ULTRA_IO_EXTENT);
317 return retval;
318 }
319
320 #ifdef __ISAPNP__
321 static int __init ultra_probe_isapnp(struct net_device *dev)
322 {
323 int i;
324
325 for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
326 struct pnp_dev *idev = NULL;
327
328 while ((idev = pnp_find_dev(NULL,
329 ultra_device_ids[i].vendor,
330 ultra_device_ids[i].function,
331 idev))) {
332 /* Avoid already found cards from previous calls */
333 if (pnp_device_attach(idev) < 0)
334 continue;
335 if (pnp_activate_dev(idev) < 0) {
336 __again:
337 pnp_device_detach(idev);
338 continue;
339 }
340 /* if no io and irq, search for next */
341 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
342 goto __again;
343 /* found it */
344 dev->base_addr = pnp_port_start(idev, 0);
345 dev->irq = pnp_irq(idev, 0);
346 printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
347 (char *) ultra_device_ids[i].driver_data,
348 dev->base_addr, dev->irq);
349 if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
350 printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
351 pnp_device_detach(idev);
352 return -ENXIO;
353 }
354 ei_status.priv = (unsigned long)idev;
355 break;
356 }
357 if (!idev)
358 continue;
359 return 0;
360 }
361
362 return -ENODEV;
363 }
364 #endif
365
366 static int
367 ultra_open(struct net_device *dev)
368 {
369 int retval;
370 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
371 unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
372 0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
373
374 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
375 if (retval)
376 return retval;
377
378 outb(0x00, ioaddr); /* Disable shared memory for safety. */
379 outb(0x80, ioaddr + 5);
380 /* Set the IRQ line. */
381 outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
382 outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
383 outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
384
385 if (ei_status.block_input == &ultra_pio_input) {
386 outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
387 outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
388 } else
389 outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
390 /* Set the early receive warning level in window 0 high enough not
391 to receive ERW interrupts. */
392 outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
393 outb(0xff, dev->base_addr + EN0_ERWCNT);
394 ei_open(dev);
395 return 0;
396 }
397
398 static void
399 ultra_reset_8390(struct net_device *dev)
400 {
401 int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
402
403 outb(ULTRA_RESET, cmd_port);
404 if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
405 ei_status.txing = 0;
406
407 outb(0x00, cmd_port); /* Disable shared memory for safety. */
408 outb(0x80, cmd_port + 5);
409 if (ei_status.block_input == &ultra_pio_input)
410 outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
411 else
412 outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
413
414 if (ei_debug > 1) printk("reset done\n");
415 return;
416 }
417
418 /* Grab the 8390 specific header. Similar to the block_input routine, but
419 we don't need to be concerned with ring wrap as the header will be at
420 the start of a page, so we optimize accordingly. */
421
422 static void
423 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
424 {
425 void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
426
427 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
428 #ifdef __BIG_ENDIAN
429 /* Officially this is what we are doing, but the readl() is faster */
430 /* unfortunately it isn't endian aware of the struct */
431 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
432 hdr->count = le16_to_cpu(hdr->count);
433 #else
434 ((unsigned int*)hdr)[0] = readl(hdr_start);
435 #endif
436 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
437 }
438
439 /* Block input and output are easy on shared memory ethercards, the only
440 complication is when the ring buffer wraps. */
441
442 static void
443 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
444 {
445 void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
446
447 /* Enable shared memory. */
448 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
449
450 if (ring_offset + count > ei_status.stop_page*256) {
451 /* We must wrap the input move. */
452 int semi_count = ei_status.stop_page*256 - ring_offset;
453 memcpy_fromio(skb->data, xfer_start, semi_count);
454 count -= semi_count;
455 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
456 } else {
457 /* Packet is in one chunk -- we can copy + cksum. */
458 eth_io_copy_and_sum(skb, xfer_start, count, 0);
459 }
460
461 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
462 }
463
464 static void
465 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
466 int start_page)
467 {
468 void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
469
470 /* Enable shared memory. */
471 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
472
473 memcpy_toio(shmem, buf, count);
474
475 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
476 }
477
478 /* The identical operations for programmed I/O cards.
479 The PIO model is trivial to use: the 16 bit start address is written
480 byte-sequentially to IOPA, with no intervening I/O operations, and the
481 data is read or written to the IOPD data port.
482 The only potential complication is that the address register is shared
483 and must be always be rewritten between each read/write direction change.
484 This is no problem for us, as the 8390 code ensures that we are single
485 threaded. */
486 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
487 int ring_page)
488 {
489 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
490 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
491 outb(ring_page, ioaddr + IOPA);
492 insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
493 }
494
495 static void ultra_pio_input(struct net_device *dev, int count,
496 struct sk_buff *skb, int ring_offset)
497 {
498 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
499 char *buf = skb->data;
500
501 /* For now set the address again, although it should already be correct. */
502 outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
503 outb(ring_offset >> 8, ioaddr + IOPA);
504 /* We know skbuffs are padded to at least word alignment. */
505 insw(ioaddr + IOPD, buf, (count+1)>>1);
506 }
507
508 static void ultra_pio_output(struct net_device *dev, int count,
509 const unsigned char *buf, const int start_page)
510 {
511 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
512 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
513 outb(start_page, ioaddr + IOPA);
514 /* An extra odd byte is OK here as well. */
515 outsw(ioaddr + IOPD, buf, (count+1)>>1);
516 }
517
518 static int
519 ultra_close_card(struct net_device *dev)
520 {
521 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
522
523 netif_stop_queue(dev);
524
525 if (ei_debug > 1)
526 printk("%s: Shutting down ethercard.\n", dev->name);
527
528 outb(0x00, ioaddr + 6); /* Disable interrupts. */
529 free_irq(dev->irq, dev);
530
531 NS8390_init(dev, 0);
532
533 /* We should someday disable shared memory and change to 8-bit mode
534 "just in case"... */
535
536 return 0;
537 }
538
539
540 #ifdef MODULE
541 #define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
542 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
543 static int io[MAX_ULTRA_CARDS];
544 static int irq[MAX_ULTRA_CARDS];
545
546 module_param_array(io, int, NULL, 0);
547 module_param_array(irq, int, NULL, 0);
548 MODULE_PARM_DESC(io, "I/O base address(es)");
549 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
550 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
551 MODULE_LICENSE("GPL");
552
553 /* This is set up so that only a single autoprobe takes place per call.
554 ISA device autoprobes on a running machine are not recommended. */
555 int __init
556 init_module(void)
557 {
558 struct net_device *dev;
559 int this_dev, found = 0;
560
561 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
562 if (io[this_dev] == 0) {
563 if (this_dev != 0) break; /* only autoprobe 1st one */
564 printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
565 }
566 dev = alloc_ei_netdev();
567 if (!dev)
568 break;
569 dev->irq = irq[this_dev];
570 dev->base_addr = io[this_dev];
571 if (do_ultra_probe(dev) == 0) {
572 dev_ultra[found++] = dev;
573 continue;
574 }
575 free_netdev(dev);
576 printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
577 break;
578 }
579 if (found)
580 return 0;
581 return -ENXIO;
582 }
583
584 static void cleanup_card(struct net_device *dev)
585 {
586 /* NB: ultra_close_card() does free_irq */
587 #ifdef __ISAPNP__
588 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
589 if (idev)
590 pnp_device_detach(idev);
591 #endif
592 release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
593 iounmap(ei_status.mem);
594 }
595
596 void __exit
597 cleanup_module(void)
598 {
599 int this_dev;
600
601 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
602 struct net_device *dev = dev_ultra[this_dev];
603 if (dev) {
604 unregister_netdev(dev);
605 cleanup_card(dev);
606 free_netdev(dev);
607 }
608 }
609 }
610 #endif /* MODULE */
Linux with added FPC-III support