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1.1 root 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 Public License, incorporated herein by reference.
12:
13: The author may be reached as [email protected], or C/O
14: Center of Excellence in Space Data and Information Sciences
15: Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
16:
17: This driver uses the cards in the 8390-compatible mode.
18: Most of the run-time complexity is handled by the generic code in
19: 8390.c. The code in this file is responsible for
20:
21: ultra_probe() Detecting and initializing the card.
22: ultra_probe1()
23:
24: ultra_open() The card-specific details of starting, stopping
25: ultra_reset_8390() and resetting the 8390 NIC core.
26: ultra_close()
27:
28: ultra_block_input() Routines for reading and writing blocks of
29: ultra_block_output() packet buffer memory.
30: ultra_pio_input()
31: ultra_pio_output()
32:
33: This driver enables the shared memory only when doing the actual data
34: transfers to avoid a bug in early version of the card that corrupted
35: data transferred by a AHA1542.
36:
37: This driver now supports the programmed-I/O (PIO) data transfer mode of
38: the EtherEZ. It does not use the non-8390-compatible "Altego" mode.
39: That support (if available) is in smc-ez.c.
40:
41: Changelog:
42:
43: Paul Gortmaker : multiple card support for module users.
44: Donald Becker : 4/17/96 PIO support, minor potential problems avoided.
45: Donald Becker : 6/6/96 correctly set auto-wrap bit.
46: */
47:
48: static const char *version =
49: "smc-ultra.c:v2.02 2/3/98 Donald Becker ([email protected])\n";
50:
51: #include <linux/module.h>
52:
53: #include <linux/kernel.h>
54: #include <linux/sched.h>
55: #include <linux/errno.h>
56: #include <linux/string.h>
57: #include <asm/io.h>
58: #include <asm/system.h>
59:
60: #include <linux/netdevice.h>
61: #include <linux/etherdevice.h>
62: #include "8390.h"
63:
64: /* A zero-terminated list of I/O addresses to be probed. */
65: static unsigned int ultra_portlist[] =
66: {0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};
67:
68: int ultra_probe(struct device *dev);
69: int ultra_probe1(struct device *dev, int ioaddr);
70:
71: static int ultra_open(struct device *dev);
72: static void ultra_reset_8390(struct device *dev);
73: static void ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
74: int ring_page);
75: static void ultra_block_input(struct device *dev, int count,
76: struct sk_buff *skb, int ring_offset);
77: static void ultra_block_output(struct device *dev, int count,
78: const unsigned char *buf, const int start_page);
79: static void ultra_pio_get_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
80: int ring_page);
81: static void ultra_pio_input(struct device *dev, int count,
82: struct sk_buff *skb, int ring_offset);
83: static void ultra_pio_output(struct device *dev, int count,
84: const unsigned char *buf, const int start_page);
85: static int ultra_close_card(struct device *dev);
86:
87:
88: #define START_PG 0x00 /* First page of TX buffer */
89:
90: #define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
91: #define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
92: #define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
93: #define IOPD 0x02 /* I/O Pipe Data (16 bits), PIO operation. */
94: #define IOPA 0x07 /* I/O Pipe Address for PIO operation. */
95: #define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
96: #define ULTRA_IO_EXTENT 32
97: #define EN0_ERWCNT 0x08 /* Early receive warning count. */
98:
99: /* Probe for the Ultra. This looks like a 8013 with the station
100: address PROM at I/O ports <base>+8 to <base>+13, with a checksum
101: following.
102: */
103: #ifdef HAVE_DEVLIST
104: struct netdev_entry ultra_drv =
105: {"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};
106: #else
107:
108: int ultra_probe(struct device *dev)
109: {
110: int i;
111: int base_addr = dev ? dev->base_addr : 0;
112:
113: if (base_addr > 0x1ff) /* Check a single specified location. */
114: return ultra_probe1(dev, base_addr);
115: else if (base_addr != 0) /* Don't probe at all. */
116: return ENXIO;
117:
118: for (i = 0; ultra_portlist[i]; i++) {
119: int ioaddr = ultra_portlist[i];
120: if (check_region(ioaddr, ULTRA_IO_EXTENT))
121: continue;
122: if (ultra_probe1(dev, ioaddr) == 0)
123: return 0;
124: }
125:
126: return ENODEV;
127: }
128: #endif
129:
130: int ultra_probe1(struct device *dev, int ioaddr)
131: {
132: int i;
133: int checksum = 0;
134: const char *model_name;
135: unsigned char eeprom_irq = 0;
136: static unsigned version_printed = 0;
137: /* Values from various config regs. */
138: unsigned char num_pages, irqreg, addr, piomode;
139: unsigned char idreg = inb(ioaddr + 7);
140: unsigned char reg4 = inb(ioaddr + 4) & 0x7f;
141:
142: /* Check the ID nibble. */
143: if ((idreg & 0xF0) != 0x20 /* SMC Ultra */
144: && (idreg & 0xF0) != 0x40) /* SMC EtherEZ */
145: return ENODEV;
146:
147: /* Select the station address register set. */
148: outb(reg4, ioaddr + 4);
149:
150: for (i = 0; i < 8; i++)
151: checksum += inb(ioaddr + 8 + i);
152: if ((checksum & 0xff) != 0xFF)
153: return ENODEV;
154:
155: if (dev == NULL)
156: dev = init_etherdev(0, 0);
157:
158: if (ei_debug && version_printed++ == 0)
1.1.1.2 ! root 159: printk("%s", version);
1.1 root 160:
161: model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";
162:
163: printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);
164:
165: for (i = 0; i < 6; i++)
166: printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
167:
168: /* Switch from the station address to the alternate register set and
169: read the useful registers there. */
170: outb(0x80 | reg4, ioaddr + 4);
171:
172: /* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
173: outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
174: piomode = inb(ioaddr + 0x8);
175: addr = inb(ioaddr + 0xb);
176: irqreg = inb(ioaddr + 0xd);
177:
178: /* Switch back to the station address register set so that the MS-DOS driver
179: can find the card after a warm boot. */
180: outb(reg4, ioaddr + 4);
181:
182: if (dev->irq < 2) {
183: unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
184: int irq;
185:
186: /* The IRQ bits are split. */
187: irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];
188:
189: if (irq == 0) {
190: printk(", failed to detect IRQ line.\n");
191: return -EAGAIN;
192: }
193: dev->irq = irq;
194: eeprom_irq = 1;
195: }
196:
197: /* Allocate dev->priv and fill in 8390 specific dev fields. */
198: if (ethdev_init(dev)) {
199: printk (", no memory for dev->priv.\n");
200: return -ENOMEM;
201: }
202:
203: /* OK, we are certain this is going to work. Setup the device. */
204: request_region(ioaddr, ULTRA_IO_EXTENT, model_name);
205:
206: /* The 8390 isn't at the base address, so fake the offset */
207: dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;
208:
209: {
210: int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};
211: short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};
212:
213: dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;
214: num_pages = num_pages_tbl[(addr >> 4) & 3];
215: }
216:
217: ei_status.name = model_name;
218: ei_status.word16 = 1;
219: ei_status.tx_start_page = START_PG;
220: ei_status.rx_start_page = START_PG + TX_PAGES;
221: ei_status.stop_page = num_pages;
222:
223: dev->rmem_start = dev->mem_start + TX_PAGES*256;
224: dev->mem_end = dev->rmem_end
225: = dev->mem_start + (ei_status.stop_page - START_PG)*256;
226:
227: if (piomode) {
228: printk(",%s IRQ %d programmed-I/O mode.\n",
229: eeprom_irq ? "EEPROM" : "assigned ", dev->irq);
230: ei_status.block_input = &ultra_pio_input;
231: ei_status.block_output = &ultra_pio_output;
232: ei_status.get_8390_hdr = &ultra_pio_get_hdr;
233: } else {
234: printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",
235: dev->irq, dev->mem_start, dev->mem_end-1);
236: ei_status.block_input = &ultra_block_input;
237: ei_status.block_output = &ultra_block_output;
238: ei_status.get_8390_hdr = &ultra_get_8390_hdr;
239: }
240: ei_status.reset_8390 = &ultra_reset_8390;
241: dev->open = &ultra_open;
242: dev->stop = &ultra_close_card;
243: NS8390_init(dev, 0);
244:
245: return 0;
246: }
247:
248: static int
249: ultra_open(struct device *dev)
250: {
251: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
252: unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,
253: 0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };
254:
255: if (request_irq(dev->irq, ei_interrupt, 0, ei_status.name, dev))
256: return -EAGAIN;
257:
258: outb(0x00, ioaddr); /* Disable shared memory for safety. */
259: outb(0x80, ioaddr + 5);
260: /* Set the IRQ line. */
261: outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);
262: outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);
263: outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);
264:
265: if (ei_status.block_input == &ultra_pio_input) {
266: outb(0x11, ioaddr + 6); /* Enable interrupts and PIO. */
267: outb(0x01, ioaddr + 0x19); /* Enable ring read auto-wrap. */
268: } else
269: outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
270: /* Set the early receive warning level in window 0 high enough not
271: to receive ERW interrupts. */
272: outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
273: outb(0xff, dev->base_addr + EN0_ERWCNT);
274: ei_open(dev);
275: MOD_INC_USE_COUNT;
276: return 0;
277: }
278:
279: static void
280: ultra_reset_8390(struct device *dev)
281: {
282: int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */
283:
284: outb(ULTRA_RESET, cmd_port);
285: if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);
286: ei_status.txing = 0;
287:
288: outb(0x00, cmd_port); /* Disable shared memory for safety. */
289: outb(0x80, cmd_port + 5);
290: if (ei_status.block_input == &ultra_pio_input)
291: outb(0x11, cmd_port + 6); /* Enable interrupts and PIO. */
292: else
293: outb(0x01, cmd_port + 6); /* Enable interrupts and memory. */
294:
295: if (ei_debug > 1) printk("reset done\n");
296: return;
297: }
298:
299: /* Grab the 8390 specific header. Similar to the block_input routine, but
300: we don't need to be concerned with ring wrap as the header will be at
301: the start of a page, so we optimize accordingly. */
302:
303: static void
304: ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
305: {
306: unsigned long hdr_start = dev->mem_start + ((ring_page - START_PG)<<8);
307:
308: outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem on */
309: #ifdef notdef
310: /* Officially this is what we are doing, but the readl() is faster */
311: memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
312: #else
313: ((unsigned int*)hdr)[0] = readl(hdr_start);
314: #endif
315: outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */
316: }
317:
318: /* Block input and output are easy on shared memory ethercards, the only
319: complication is when the ring buffer wraps. */
320:
321: static void
322: ultra_block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
323: {
324: unsigned long xfer_start = dev->mem_start + ring_offset - (START_PG<<8);
325:
326: /* Enable shared memory. */
327: outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
328:
329: if (xfer_start + count > dev->rmem_end) {
330: /* We must wrap the input move. */
331: int semi_count = dev->rmem_end - xfer_start;
332: memcpy_fromio(skb->data, xfer_start, semi_count);
333: count -= semi_count;
334: memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);
335: } else {
336: /* Packet is in one chunk -- we can copy + cksum. */
337: eth_io_copy_and_sum(skb, xfer_start, count, 0);
338: }
339:
340: outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
341: }
342:
343: static void
344: ultra_block_output(struct device *dev, int count, const unsigned char *buf,
345: int start_page)
346: {
347: unsigned long shmem = dev->mem_start + ((start_page - START_PG)<<8);
348:
349: /* Enable shared memory. */
350: outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);
351:
352: memcpy_toio(shmem, buf, count);
353:
354: outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */
355: }
356:
357: /* The identical operations for programmed I/O cards.
358: The PIO model is trivial to use: the 16 bit start address is written
359: byte-sequentially to IOPA, with no intervening I/O operations, and the
360: data is read or written to the IOPD data port.
361: The only potential complication is that the address register is shared
362: and must be always be rewritten between each read/write direction change.
363: This is no problem for us, as the 8390 code ensures that we are single
364: threaded. */
365: static void ultra_pio_get_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,
366: int ring_page)
367: {
368: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
369: outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
370: outb(ring_page, ioaddr + IOPA);
371: insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);
372: }
373:
374: static void ultra_pio_input(struct device *dev, int count,
375: struct sk_buff *skb, int ring_offset)
376: {
377: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
378: char *buf = skb->data;
379:
380: /* For now set the address again, although it should already be correct. */
381: outb(ring_offset, ioaddr + IOPA); /* Set the address, LSB first. */
382: outb(ring_offset >> 8, ioaddr + IOPA);
383: /* We know skbuffs are padded to at least word alignment. */
384: insw(ioaddr + IOPD, buf, (count+1)>>1);
385: }
386:
387: static void ultra_pio_output(struct device *dev, int count,
388: const unsigned char *buf, const int start_page)
389: {
390: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
391: outb(0x00, ioaddr + IOPA); /* Set the address, LSB first. */
392: outb(start_page, ioaddr + IOPA);
393: /* An extra odd byte is OK here as well. */
394: outsw(ioaddr + IOPD, buf, (count+1)>>1);
395: }
396:
397: static int
398: ultra_close_card(struct device *dev)
399: {
400: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */
401:
402: dev->start = 0;
403: dev->tbusy = 1;
404:
405: if (ei_debug > 1)
406: printk("%s: Shutting down ethercard.\n", dev->name);
407:
408: outb(0x00, ioaddr + 6); /* Disable interrupts. */
409: free_irq(dev->irq, dev);
410: irq2dev_map[dev->irq] = 0;
411:
412: NS8390_init(dev, 0);
413:
414: /* We should someday disable shared memory and change to 8-bit mode
415: "just in case"... */
416:
417: MOD_DEC_USE_COUNT;
418:
419: return 0;
420: }
421:
422:
423: #ifdef MODULE
424: #define MAX_ULTRA_CARDS 4 /* Max number of Ultra cards per module */
425: #define NAMELEN 8 /* # of chars for storing dev->name */
426: static char namelist[NAMELEN * MAX_ULTRA_CARDS] = { 0, };
427: static struct device dev_ultra[MAX_ULTRA_CARDS] = {
428: {
429: NULL, /* assign a chunk of namelist[] below */
430: 0, 0, 0, 0,
431: 0, 0,
432: 0, 0, 0, NULL, NULL
433: },
434: };
435:
436: static int io[MAX_ULTRA_CARDS] = { 0, };
437: static int irq[MAX_ULTRA_CARDS] = { 0, };
438:
439: /* This is set up so that only a single autoprobe takes place per call.
440: ISA device autoprobes on a running machine are not recommended. */
441: int
442: init_module(void)
443: {
444: int this_dev, found = 0;
445:
446: for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
447: struct device *dev = &dev_ultra[this_dev];
448: dev->name = namelist+(NAMELEN*this_dev);
449: dev->irq = irq[this_dev];
450: dev->base_addr = io[this_dev];
451: dev->init = ultra_probe;
452: if (io[this_dev] == 0) {
453: if (this_dev != 0) break; /* only autoprobe 1st one */
454: printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");
455: }
456: if (register_netdev(dev) != 0) {
457: printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);
458: if (found != 0) return 0; /* Got at least one. */
459: return -ENXIO;
460: }
461: found++;
462: }
463:
464: return 0;
465: }
466:
467: void
468: cleanup_module(void)
469: {
470: int this_dev;
471:
472: for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {
473: struct device *dev = &dev_ultra[this_dev];
474: if (dev->priv != NULL) {
475: /* NB: ultra_close_card() does free_irq + irq2dev */
476: int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
477: kfree(dev->priv);
478: dev->priv = NULL;
479: release_region(ioaddr, ULTRA_IO_EXTENT);
480: unregister_netdev(dev);
481: }
482: }
483: }
484: #endif /* MODULE */
485:
486:
487: /*
488: * Local variables:
489: * compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c"
490: * version-control: t
491: * kept-new-versions: 5
492: * c-indent-level: 4
493: * c-basic-offset: 4
494: * tab-width: 4
495: * End:
496: */
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