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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
[linux-2.6/openmoko-kernel/knife-kernel.git] / drivers / net / smc-ultra.c
blob00d6cf1af4843a929f5856a40c8bf3af9b0b0c9b
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 #ifdef CONFIG_NET_POLL_CONTROLLER
146 dev->poll_controller = &ultra_poll;
147 #endif
148 if (base_addr > 0x1ff) /* Check a single specified location. */
149 return ultra_probe1(dev, base_addr);
150 else if (base_addr != 0) /* Don't probe at all. */
151 return -ENXIO;
152
153 #ifdef __ISAPNP__
154 /* Look for any installed ISAPnP cards */
155 if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
156 return 0;
157 #endif
158
159 for (i = 0; ultra_portlist[i]; i++) {
160 dev->irq = irq;
161 if (ultra_probe1(dev, ultra_portlist[i]) == 0)
162 return 0;
163 }
164
165 return -ENODEV;
166 }
167
168 #ifndef MODULE
169 struct net_device * __init ultra_probe(int unit)
170 {
171 struct net_device *dev = alloc_ei_netdev();
172 int err;
173
174 if (!dev)
175 return ERR_PTR(-ENOMEM);
176
177 sprintf(dev->name, "eth%d", unit);
178 netdev_boot_setup_check(dev);
179
180 err = do_ultra_probe(dev);
181 if (err)
182 goto out;
183 return dev;
184 out:
185 free_netdev(dev);
186 return ERR_PTR(err);
187 }
188 #endif
189
190 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
191 {
192 int i, retval;
193 int checksum = 0;
194 const char *model_name;
195 unsigned char eeprom_irq = 0;
196 static unsigned version_printed;
197 /* Values from various config regs. */
198 unsigned char num_pages, irqreg, addr, piomode;
199 unsigned char idreg = inb(ioaddr + 7);
200 unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
201 DECLARE_MAC_BUF(mac);
202
203 if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
204 return -EBUSY;
205
206 /* Check the ID nibble. */
207 if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
208 && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
209 retval = -ENODEV;
210 goto out;
211 }
212
213 /* Select the station address register set. */
214 outb(reg4, ioaddr + 4);
215
216 for (i = 0; i < 8; i++)
217 checksum += inb(ioaddr + 8 + i);
218 if ((checksum & 0xff) != 0xFF) {
219 retval = -ENODEV;
220 goto out;
221 }
222
223 if (ei_debug && version_printed++ == 0)
224 printk(version);
225
226 model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
227
228 for (i = 0; i < 6; i++)
229 dev->dev_addr[i] = inb(ioaddr + 8 + i);
230
231 printk("%s: %s at %#3x, %s", dev->name, model_name,
232 ioaddr, print_mac(mac, dev->dev_addr));
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 memcpy_fromio(skb->data, xfer_start, count);
458 }
459
460 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
461 }
462
463 static void
464 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
465 int start_page)
466 {
467 void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
468
469 /* Enable shared memory. */
470 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
471
472 memcpy_toio(shmem, buf, count);
473
474 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
475 }
476
477 /* The identical operations for programmed I/O cards.
478 The PIO model is trivial to use: the 16 bit start address is written
479 byte-sequentially to IOPA, with no intervening I/O operations, and the
480 data is read or written to the IOPD data port.
481 The only potential complication is that the address register is shared
482 and must be always be rewritten between each read/write direction change.
483 This is no problem for us, as the 8390 code ensures that we are single
484 threaded. */
485 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
486 int ring_page)
487 {
488 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
489 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
490 outb(ring_page, ioaddr + IOPA);
491 insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
492 }
493
494 static void ultra_pio_input(struct net_device *dev, int count,
495 struct sk_buff *skb, int ring_offset)
496 {
497 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
498 char *buf = skb->data;
499
500 /* For now set the address again, although it should already be correct. */
501 outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
502 outb(ring_offset >> 8, ioaddr + IOPA);
503 /* We know skbuffs are padded to at least word alignment. */
504 insw(ioaddr + IOPD, buf, (count+1)>>1);
505 }
506
507 static void ultra_pio_output(struct net_device *dev, int count,
508 const unsigned char *buf, const int start_page)
509 {
510 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
511 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
512 outb(start_page, ioaddr + IOPA);
513 /* An extra odd byte is OK here as well. */
514 outsw(ioaddr + IOPD, buf, (count+1)>>1);
515 }
516
517 static int
518 ultra_close_card(struct net_device *dev)
519 {
520 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
521
522 netif_stop_queue(dev);
523
524 if (ei_debug > 1)
525 printk("%s: Shutting down ethercard.\n", dev->name);
526
527 outb(0x00, ioaddr + 6); /* Disable interrupts. */
528 free_irq(dev->irq, dev);
529
530 NS8390_init(dev, 0);
531
532 /* We should someday disable shared memory and change to 8-bit mode
533 "just in case"... */
534
535 return 0;
536 }
537
538
539 #ifdef MODULE
540 #define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
541 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
542 static int io[MAX_ULTRA_CARDS];
543 static int irq[MAX_ULTRA_CARDS];
544
545 module_param_array(io, int, NULL, 0);
546 module_param_array(irq, int, NULL, 0);
547 MODULE_PARM_DESC(io, "I/O base address(es)");
548 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
549 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
550 MODULE_LICENSE("GPL");
551
552 /* This is set up so that only a single autoprobe takes place per call.
553 ISA device autoprobes on a running machine are not recommended. */
554 int __init
555 init_module(void)
556 {
557 struct net_device *dev;
558 int this_dev, found = 0;
559
560 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
561 if (io[this_dev] == 0) {
562 if (this_dev != 0) break; /* only autoprobe 1st one */
563 printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
564 }
565 dev = alloc_ei_netdev();
566 if (!dev)
567 break;
568 dev->irq = irq[this_dev];
569 dev->base_addr = io[this_dev];
570 if (do_ultra_probe(dev) == 0) {
571 dev_ultra[found++] = dev;
572 continue;
573 }
574 free_netdev(dev);
575 printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
576 break;
577 }
578 if (found)
579 return 0;
580 return -ENXIO;
581 }
582
583 static void cleanup_card(struct net_device *dev)
584 {
585 /* NB: ultra_close_card() does free_irq */
586 #ifdef __ISAPNP__
587 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
588 if (idev)
589 pnp_device_detach(idev);
590 #endif
591 release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
592 iounmap(ei_status.mem);
593 }
594
595 void __exit
596 cleanup_module(void)
597 {
598 int this_dev;
599
600 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
601 struct net_device *dev = dev_ultra[this_dev];
602 if (dev) {
603 unregister_netdev(dev);
604 cleanup_card(dev);
605 free_netdev(dev);
606 }
607 }
608 }
609 #endif /* MODULE */
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