1 /* smc-ultra.c: A SMC Ultra ethernet driver for linux. */
3 This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.
5 Written 1993-1998 by Donald Becker.
7 Copyright 1993 United States Government as represented by the
8 Director, National Security Agency.
10 This software may be used and distributed according to the terms
11 of the GNU General Public License, incorporated herein by reference.
13 The author may be reached as becker@scyld.com, or C/O
14 Scyld Computing Corporation
15 410 Severn Ave., Suite 210
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
22 ultra_probe() Detecting and initializing the card.
26 ultra_open() The card-specific details of starting, stopping
27 ultra_reset_8390() and resetting the 8390 NIC core.
30 ultra_block_input() Routines for reading and writing blocks of
31 ultra_block_output() packet buffer memory.
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.
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.
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
50 Note about the ISA PnP support:
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.
57 static const char version[] =
58 "smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
60 #include <linux/config.h>
61 #include <linux/module.h>
62 #include <linux/kernel.h>
63 #include <linux/errno.h>
64 #include <linux/string.h>
65 #include <linux/init.h>
66 #include <linux/isapnp.h>
67 #include <linux/netdevice.h>
68 #include <linux/etherdevice.h>
71 #include <asm/system.h>
75 #define DRV_NAME "smc-ultra"
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};
81 static int ultra_probe1(struct net_device *dev, int ioaddr);
84 static int ultra_probe_isapnp(struct net_device *dev);
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,
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,
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);
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 */
111 MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);
115 #define START_PG 0x00 /* First page of TX buffer */
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. */
126 #ifdef CONFIG_NET_POLL_CONTROLLER
127 static void ultra_poll(struct net_device *dev)
129 disable_irq(dev->irq);
130 ei_interrupt(dev->irq, dev, NULL);
131 enable_irq(dev->irq);
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
139 static int __init do_ultra_probe(struct net_device *dev)
142 int base_addr = dev->base_addr;
145 SET_MODULE_OWNER(dev);
147 #ifdef CONFIG_NET_POLL_CONTROLLER
148 dev->poll_controller = &ultra_poll;
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. */
156 /* Look for any installed ISAPnP cards */
157 if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))
161 for (i = 0; ultra_portlist[i]; i++) {
163 if (ultra_probe1(dev, ultra_portlist[i]) == 0)
170 static void cleanup_card(struct net_device *dev)
172 /* NB: ultra_close_card() does free_irq */
174 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
176 pnp_device_detach(idev);
178 release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);
179 iounmap(ei_status.mem);
183 struct net_device * __init ultra_probe(int unit)
185 struct net_device *dev = alloc_ei_netdev();
189 return ERR_PTR(-ENOMEM);
191 sprintf(dev->name, "eth%d", unit);
192 netdev_boot_setup_check(dev);
194 err = do_ultra_probe(dev);
204 static int __init ultra_probe1(struct net_device *dev, int ioaddr)
208 const char *model_name;
209 unsigned char eeprom_irq = 0;
210 static unsigned version_printed;
211 /* Values from various config regs. */
212 unsigned char num_pages, irqreg, addr, piomode;
213 unsigned char idreg = inb(ioaddr + 7);
214 unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
216 if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))
219 /* Check the ID nibble. */
220 if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
221 && (idreg & 0xF0) != 0x40) { /* SMC EtherEZ */
226 /* Select the station address register set. */
227 outb(reg4, ioaddr + 4);
229 for (i = 0; i < 8; i++)
230 checksum += inb(ioaddr + 8 + i);
231 if ((checksum & 0xff) != 0xFF) {
236 if (ei_debug && version_printed++ == 0)
239 model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
241 printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
243 for (i = 0; i < 6; i++)
244 printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
246 /* Switch from the station address to the alternate register set and
247 read the useful registers there. */
248 outb(0x80 | reg4, ioaddr + 4);
250 /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
251 outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
252 piomode = inb(ioaddr + 0x8);
253 addr = inb(ioaddr + 0xb);
254 irqreg = inb(ioaddr + 0xd);
256 /* Switch back to the station address register set so that the MS-DOS driver
257 can find the card after a warm boot. */
258 outb(reg4, ioaddr + 4);
261 unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
264 /* The IRQ bits are split. */
265 irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
268 printk(", failed to detect IRQ line.\n");
276 /* The 8390 isn't at the base address, so fake the offset */
277 dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
280 int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
281 short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
283 dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
284 num_pages = num_pages_tbl[(addr >> 4) & 3];
287 ei_status.name = model_name;
288 ei_status.word16 = 1;
289 ei_status.tx_start_page = START_PG;
290 ei_status.rx_start_page = START_PG + TX_PAGES;
291 ei_status.stop_page = num_pages;
293 ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG)*256);
294 if (!ei_status.mem) {
295 printk(", failed to ioremap.\n");
300 dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG)*256;
303 printk(",%s IRQ %d programmed-I/O mode.\n",
304 eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
305 ei_status.block_input = &ultra_pio_input;
306 ei_status.block_output = &ultra_pio_output;
307 ei_status.get_8390_hdr = &ultra_pio_get_hdr;
309 printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
310 dev->irq, dev->mem_start, dev->mem_end-1);
311 ei_status.block_input = &ultra_block_input;
312 ei_status.block_output = &ultra_block_output;
313 ei_status.get_8390_hdr = &ultra_get_8390_hdr;
315 ei_status.reset_8390 = &ultra_reset_8390;
316 dev->open = &ultra_open;
317 dev->stop = &ultra_close_card;
318 #ifdef CONFIG_NET_POLL_CONTROLLER
319 dev->poll_controller = ei_poll;
323 retval = register_netdev(dev);
328 release_region(ioaddr, ULTRA_IO_EXTENT);
333 static int __init ultra_probe_isapnp(struct net_device *dev)
337 for (i = 0; ultra_device_ids[i].vendor != 0; i++) {
338 struct pnp_dev *idev = NULL;
340 while ((idev = pnp_find_dev(NULL,
341 ultra_device_ids[i].vendor,
342 ultra_device_ids[i].function,
344 /* Avoid already found cards from previous calls */
345 if (pnp_device_attach(idev) < 0)
347 if (pnp_activate_dev(idev) < 0) {
349 pnp_device_detach(idev);
352 /* if no io and irq, search for next */
353 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0))
356 dev->base_addr = pnp_port_start(idev, 0);
357 dev->irq = pnp_irq(idev, 0);
358 printk(KERN_INFO "smc-ultra.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
359 (char *) ultra_device_ids[i].driver_data,
360 dev->base_addr, dev->irq);
361 if (ultra_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
362 printk(KERN_ERR "smc-ultra.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
363 pnp_device_detach(idev);
366 ei_status.priv = (unsigned long)idev;
379 ultra_open(struct net_device *dev)
382 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
383 unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
384 0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
386 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
390 outb(0x00, ioaddr); /* Disable shared memory for safety. */
391 outb(0x80, ioaddr + 5);
392 /* Set the IRQ line. */
393 outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
394 outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
395 outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
397 if (ei_status.block_input == &ultra_pio_input) {
398 outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
399 outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
401 outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
402 /* Set the early receive warning level in window 0 high enough not
403 to receive ERW interrupts. */
404 outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
405 outb(0xff, dev->base_addr + EN0_ERWCNT);
411 ultra_reset_8390(struct net_device *dev)
413 int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
415 outb(ULTRA_RESET, cmd_port);
416 if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
419 outb(0x00, cmd_port); /* Disable shared memory for safety. */
420 outb(0x80, cmd_port + 5);
421 if (ei_status.block_input == &ultra_pio_input)
422 outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
424 outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
426 if (ei_debug > 1) printk("reset done\n");
430 /* Grab the 8390 specific header. Similar to the block_input routine, but
431 we don't need to be concerned with ring wrap as the header will be at
432 the start of a page, so we optimize accordingly. */
435 ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
437 void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG)<<8);
439 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
441 /* Officially this is what we are doing, but the readl() is faster */
442 /* unfortunately it isn't endian aware of the struct */
443 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
444 hdr->count = le16_to_cpu(hdr->count);
446 ((unsigned int*)hdr)[0] = readl(hdr_start);
448 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
451 /* Block input and output are easy on shared memory ethercards, the only
452 complication is when the ring buffer wraps. */
455 ultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
457 void __iomem *xfer_start = ei_status.mem + ring_offset - (START_PG<<8);
459 /* Enable shared memory. */
460 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
462 if (ring_offset + count > ei_status.stop_page*256) {
463 /* We must wrap the input move. */
464 int semi_count = ei_status.stop_page*256 - ring_offset;
465 memcpy_fromio(skb->data, xfer_start, semi_count);
467 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
469 /* Packet is in one chunk -- we can copy + cksum. */
470 eth_io_copy_and_sum(skb, xfer_start, count, 0);
473 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
477 ultra_block_output(struct net_device *dev, int count, const unsigned char *buf,
480 void __iomem *shmem = ei_status.mem + ((start_page - START_PG)<<8);
482 /* Enable shared memory. */
483 outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
485 memcpy_toio(shmem, buf, count);
487 outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
490 /* The identical operations for programmed I/O cards.
491 The PIO model is trivial to use: the 16 bit start address is written
492 byte-sequentially to IOPA, with no intervening I/O operations, and the
493 data is read or written to the IOPD data port.
494 The only potential complication is that the address register is shared
495 and must be always be rewritten between each read/write direction change.
496 This is no problem for us, as the 8390 code ensures that we are single
498 static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
501 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
502 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
503 outb(ring_page, ioaddr + IOPA);
504 insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
507 static void ultra_pio_input(struct net_device *dev, int count,
508 struct sk_buff *skb, int ring_offset)
510 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
511 char *buf = skb->data;
513 /* For now set the address again, although it should already be correct. */
514 outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
515 outb(ring_offset >> 8, ioaddr + IOPA);
516 /* We know skbuffs are padded to at least word alignment. */
517 insw(ioaddr + IOPD, buf, (count+1)>>1);
520 static void ultra_pio_output(struct net_device *dev, int count,
521 const unsigned char *buf, const int start_page)
523 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
524 outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
525 outb(start_page, ioaddr + IOPA);
526 /* An extra odd byte is OK here as well. */
527 outsw(ioaddr + IOPD, buf, (count+1)>>1);
531 ultra_close_card(struct net_device *dev)
533 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
535 netif_stop_queue(dev);
538 printk("%s: Shutting down ethercard.\n", dev->name);
540 outb(0x00, ioaddr + 6); /* Disable interrupts. */
541 free_irq(dev->irq, dev);
545 /* We should someday disable shared memory and change to 8-bit mode
553 #define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
554 static struct net_device *dev_ultra[MAX_ULTRA_CARDS];
555 static int io[MAX_ULTRA_CARDS];
556 static int irq[MAX_ULTRA_CARDS];
558 module_param_array(io, int, NULL, 0);
559 module_param_array(irq, int, NULL, 0);
560 MODULE_PARM_DESC(io, "I/O base address(es)");
561 MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
562 MODULE_DESCRIPTION("SMC Ultra/EtherEZ ISA/PnP Ethernet driver");
563 MODULE_LICENSE("GPL");
565 /* This is set up so that only a single autoprobe takes place per call.
566 ISA device autoprobes on a running machine are not recommended. */
570 struct net_device *dev;
571 int this_dev, found = 0;
573 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
574 if (io[this_dev] == 0) {
575 if (this_dev != 0) break; /* only autoprobe 1st one */
576 printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
578 dev = alloc_ei_netdev();
581 dev->irq = irq[this_dev];
582 dev->base_addr = io[this_dev];
583 if (do_ultra_probe(dev) == 0) {
584 dev_ultra[found++] = dev;
588 printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
601 for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
602 struct net_device *dev = dev_ultra[this_dev];
604 unregister_netdev(dev);