1 /*
2 es3210.c
3
4 Linux driver for Racal-Interlan ES3210 EISA Network Adapter
5
6 Copyright (C) 1996, Paul Gortmaker.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
11 Information and Code Sources:
12
13 1) The existing myriad of Linux 8390 drivers written by Donald Becker.
14
15 2) Once again Russ Nelson's asm packet driver provided additional info.
16
17 3) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
18 Too bad it doesn't work -- see below.
19
20 The ES3210 is an EISA shared memory NS8390 implementation. Note
21 that all memory copies to/from the board must be 32bit transfers.
22 Which rules out using eth_io_copy_and_sum() in this driver.
23
24 Apparently there are two slightly different revisions of the
25 card, since there are two distinct EISA cfg files (!rii0101.cfg
26 and !rii0102.cfg) One has media select in the cfg file and the
27 other doesn't. Hopefully this will work with either.
28
29 That is about all I can tell you about it, having never actually
30 even seen one of these cards. :) Try http://www.interlan.com
31 if you want more info.
32
33 Thanks go to Mark Salazar for testing v0.02 of this driver.
34
35 Bugs, to-fix, etc:
36
37 1) The EISA cfg ports that are *supposed* to have the IRQ and shared
38 mem values just read 0xff all the time. Hrrmpf. Apparently the
39 same happens with the packet driver as the code for reading
40 these registers is disabled there. In the meantime, boot with:
41 ether=<IRQ>,0,0x<shared_mem_addr>,eth0 to override the IRQ and
42 shared memory detection. (The i/o port detection is okay.)
43
44 2) Module support currently untested. Probably works though.
45
46 */
47
48 static const char version[] =
49 "es3210.c: Driver revision v0.03, 14/09/96\n";
50
51 #include <linux/module.h>
52 #include <linux/eisa.h>
53 #include <linux/kernel.h>
54 #include <linux/errno.h>
55 #include <linux/string.h>
56 #include <linux/init.h>
57 #include <linux/netdevice.h>
58 #include <linux/etherdevice.h>
59
60 #include <asm/io.h>
61 #include <asm/system.h>
62
63 #include "8390.h"
64
65 static int es_probe1(struct net_device *dev, int ioaddr);
66
67 static void es_reset_8390(struct net_device *dev);
68
69 static void es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
70 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
71 static void es_block_output(struct net_device *dev, int count, const unsigned char *buf, int start_page);
72
73 #define ES_START_PG 0x00 /* First page of TX buffer */
74 #define ES_STOP_PG 0x40 /* Last page +1 of RX ring */
75
76 #define ES_IO_EXTENT 0x37 /* The cfg file says 0xc90 -> 0xcc7 */
77 #define ES_ID_PORT 0xc80 /* Same for all EISA cards */
78 #define ES_SA_PROM 0xc90 /* Start of e'net addr. */
79 #define ES_RESET_PORT 0xc84 /* From the packet driver source */
80 #define ES_NIC_OFFSET 0xca0 /* Hello, the 8390 is *here* */
81
82 #define ES_ADDR0 0x02 /* 3 byte vendor prefix */
83 #define ES_ADDR1 0x07
84 #define ES_ADDR2 0x01
85
86 /*
87 * Two card revisions. EISA ID's are always rev. minor, rev. major,, and
88 * then the three vendor letters stored in 5 bits each, with an "a" = 1.
89 * For eg: "rii" = 10010 01001 01001 = 0x4929, which is how the EISA
90 * config utility determines automagically what config file(s) to use.
91 */
92 #define ES_EISA_ID1 0x01012949 /* !rii0101.cfg */
93 #define ES_EISA_ID2 0x02012949 /* !rii0102.cfg */
94
95 #define ES_CFG1 0xcc0 /* IOPORT(1) --> IOPORT(6) in cfg file */
96 #define ES_CFG2 0xcc1
97 #define ES_CFG3 0xcc2
98 #define ES_CFG4 0xcc3
99 #define ES_CFG5 0xcc4
100 #define ES_CFG6 0xc84 /* NB: 0xc84 is also "reset" port. */
101
102 /*
103 * You can OR any of the following bits together and assign it
104 * to ES_DEBUG to get verbose driver info during operation.
105 * Some of these don't do anything yet.
106 */
107
108 #define ES_D_PROBE 0x01
109 #define ES_D_RX_PKT 0x02
110 #define ES_D_TX_PKT 0x04
111 #define ED_D_IRQ 0x08
112
113 #define ES_DEBUG 0
114
115 static unsigned char lo_irq_map[] __initdata = {3, 4, 5, 6, 7, 9, 10};
116 static unsigned char hi_irq_map[] __initdata = {11, 12, 0, 14, 0, 0, 0, 15};
117
118 /*
119 * Probe for the card. The best way is to read the EISA ID if it
120 * is known. Then we check the prefix of the station address
121 * PROM for a match against the Racal-Interlan assigned value.
122 */
123
124 static int __init do_es_probe(struct net_device *dev)
125 {
126 unsigned short ioaddr = dev->base_addr;
127 int irq = dev->irq;
128 int mem_start = dev->mem_start;
129
130 if (ioaddr > 0x1ff) /* Check a single specified location. */
131 return es_probe1(dev, ioaddr);
132 else if (ioaddr > 0) /* Don't probe at all. */
133 return -ENXIO;
134
135 if (!EISA_bus) {
136 #if ES_DEBUG & ES_D_PROBE
137 printk("es3210.c: Not EISA bus. Not probing high ports.\n");
138 #endif
139 return -ENXIO;
140 }
141
142 /* EISA spec allows for up to 16 slots, but 8 is typical. */
143 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
144 if (es_probe1(dev, ioaddr) == 0)
145 return 0;
146 dev->irq = irq;
147 dev->mem_start = mem_start;
148 }
149
150 return -ENODEV;
151 }
152
153 #ifndef MODULE
154 struct net_device * __init es_probe(int unit)
155 {
156 struct net_device *dev = alloc_ei_netdev();
157 int err;
158
159 if (!dev)
160 return ERR_PTR(-ENOMEM);
161
162 sprintf(dev->name, "eth%d", unit);
163 netdev_boot_setup_check(dev);
164
165 err = do_es_probe(dev);
166 if (err)
167 goto out;
168 return dev;
169 out:
170 free_netdev(dev);
171 return ERR_PTR(err);
172 }
173 #endif
174
175 static int __init es_probe1(struct net_device *dev, int ioaddr)
176 {
177 int i, retval;
178 unsigned long eisa_id;
179
180 if (!request_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT, "es3210"))
181 return -ENODEV;
182
183 #if ES_DEBUG & ES_D_PROBE
184 printk("es3210.c: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + ES_ID_PORT));
185 printk("es3210.c: config regs: %#x %#x %#x %#x %#x %#x\n",
186 inb(ioaddr + ES_CFG1), inb(ioaddr + ES_CFG2), inb(ioaddr + ES_CFG3),
187 inb(ioaddr + ES_CFG4), inb(ioaddr + ES_CFG5), inb(ioaddr + ES_CFG6));
188 #endif
189
190 /* Check the EISA ID of the card. */
191 eisa_id = inl(ioaddr + ES_ID_PORT);
192 if ((eisa_id != ES_EISA_ID1) && (eisa_id != ES_EISA_ID2)) {
193 retval = -ENODEV;
194 goto out;
195 }
196
197 for (i = 0; i < ETHER_ADDR_LEN ; i++)
198 dev->dev_addr[i] = inb(ioaddr + ES_SA_PROM + i);
199
200 /* Check the Racal vendor ID as well. */
201 if (dev->dev_addr[0] != ES_ADDR0 ||
202 dev->dev_addr[1] != ES_ADDR1 ||
203 dev->dev_addr[2] != ES_ADDR2) {
204 printk("es3210.c: card not found %pM (invalid_prefix).\n",
205 dev->dev_addr);
206 retval = -ENODEV;
207 goto out;
208 }
209
210 printk("es3210.c: ES3210 rev. %ld at %#x, node %pM",
211 eisa_id>>24, ioaddr, dev->dev_addr);
212
213 /* Snarf the interrupt now. */
214 if (dev->irq == 0) {
215 unsigned char hi_irq = inb(ioaddr + ES_CFG2) & 0x07;
216 unsigned char lo_irq = inb(ioaddr + ES_CFG1) & 0xfe;
217
218 if (hi_irq != 0) {
219 dev->irq = hi_irq_map[hi_irq - 1];
220 } else {
221 int i = 0;
222 while (lo_irq > (1<<i)) i++;
223 dev->irq = lo_irq_map[i];
224 }
225 printk(" using IRQ %d", dev->irq);
226 #if ES_DEBUG & ES_D_PROBE
227 printk("es3210.c: hi_irq %#x, lo_irq %#x, dev->irq = %d\n",
228 hi_irq, lo_irq, dev->irq);
229 #endif
230 } else {
231 if (dev->irq == 2)
232 dev->irq = 9; /* Doh! */
233 printk(" assigning IRQ %d", dev->irq);
234 }
235
236 if (request_irq(dev->irq, ei_interrupt, 0, "es3210", dev)) {
237 printk (" unable to get IRQ %d.\n", dev->irq);
238 retval = -EAGAIN;
239 goto out;
240 }
241
242 if (dev->mem_start == 0) {
243 unsigned char mem_enabled = inb(ioaddr + ES_CFG2) & 0xc0;
244 unsigned char mem_bits = inb(ioaddr + ES_CFG3) & 0x07;
245
246 if (mem_enabled != 0x80) {
247 printk(" shared mem disabled - giving up\n");
248 retval = -ENXIO;
249 goto out1;
250 }
251 dev->mem_start = 0xC0000 + mem_bits*0x4000;
252 printk(" using ");
253 } else {
254 printk(" assigning ");
255 }
256
257 ei_status.mem = ioremap(dev->mem_start, (ES_STOP_PG - ES_START_PG)*256);
258 if (!ei_status.mem) {
259 printk("ioremap failed - giving up\n");
260 retval = -ENXIO;
261 goto out1;
262 }
263
264 dev->mem_end = dev->mem_start + (ES_STOP_PG - ES_START_PG)*256;
265
266 printk("mem %#lx-%#lx\n", dev->mem_start, dev->mem_end-1);
267
268 #if ES_DEBUG & ES_D_PROBE
269 if (inb(ioaddr + ES_CFG5))
270 printk("es3210: Warning - DMA channel enabled, but not used here.\n");
271 #endif
272 /* Note, point at the 8390, and not the card... */
273 dev->base_addr = ioaddr + ES_NIC_OFFSET;
274
275 ei_status.name = "ES3210";
276 ei_status.tx_start_page = ES_START_PG;
277 ei_status.rx_start_page = ES_START_PG + TX_PAGES;
278 ei_status.stop_page = ES_STOP_PG;
279 ei_status.word16 = 1;
280
281 if (ei_debug > 0)
282 printk(version);
283
284 ei_status.reset_8390 = &es_reset_8390;
285 ei_status.block_input = &es_block_input;
286 ei_status.block_output = &es_block_output;
287 ei_status.get_8390_hdr = &es_get_8390_hdr;
288
289 dev->netdev_ops = &ei_netdev_ops;
290 NS8390_init(dev, 0);
291
292 retval = register_netdev(dev);
293 if (retval)
294 goto out1;
295 return 0;
296 out1:
297 free_irq(dev->irq, dev);
298 out:
299 release_region(ioaddr + ES_SA_PROM, ES_IO_EXTENT);
300 return retval;
301 }
302
303 /*
304 * Reset as per the packet driver method. Judging by the EISA cfg
305 * file, this just toggles the "Board Enable" bits (bit 2 and 0).
306 */
307
308 static void es_reset_8390(struct net_device *dev)
309 {
310 unsigned short ioaddr = dev->base_addr;
311 unsigned long end;
312
313 outb(0x04, ioaddr + ES_RESET_PORT);
314 if (ei_debug > 1) printk("%s: resetting the ES3210...", dev->name);
315
316 end = jiffies + 2*HZ/100;
317 while ((signed)(end - jiffies) > 0) continue;
318
319 ei_status.txing = 0;
320 outb(0x01, ioaddr + ES_RESET_PORT);
321 if (ei_debug > 1) printk("reset done\n");
322
323 return;
324 }
325
326 /*
327 * Note: In the following three functions is the implicit assumption
328 * that the associated memcpy will only use "rep; movsl" as long as
329 * we keep the counts as some multiple of doublewords. This is a
330 * requirement of the hardware, and also prevents us from using
331 * eth_io_copy_and_sum() since we can't guarantee it will limit
332 * itself to doubleword access.
333 */
334
335 /*
336 * Grab the 8390 specific header. Similar to the block_input routine, but
337 * we don't need to be concerned with ring wrap as the header will be at
338 * the start of a page, so we optimize accordingly. (A single doubleword.)
339 */
340
341 static void
342 es_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
343 {
344 void __iomem *hdr_start = ei_status.mem + ((ring_page - ES_START_PG)<<8);
345 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
346 hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */
347 }
348
349 /*
350 * Block input and output are easy on shared memory ethercards, the only
351 * complication is when the ring buffer wraps. The count will already
352 * be rounded up to a doubleword value via es_get_8390_hdr() above.
353 */
354
355 static void es_block_input(struct net_device *dev, int count, struct sk_buff *skb,
356 int ring_offset)
357 {
358 void __iomem *xfer_start = ei_status.mem + ring_offset - ES_START_PG*256;
359
360 if (ring_offset + count > ES_STOP_PG*256) {
361 /* Packet wraps over end of ring buffer. */
362 int semi_count = ES_STOP_PG*256 - ring_offset;
363 memcpy_fromio(skb->data, xfer_start, semi_count);
364 count -= semi_count;
365 memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
366 } else {
367 /* Packet is in one chunk. */
368 memcpy_fromio(skb->data, xfer_start, count);
369 }
370 }
371
372 static void es_block_output(struct net_device *dev, int count,
373 const unsigned char *buf, int start_page)
374 {
375 void __iomem *shmem = ei_status.mem + ((start_page - ES_START_PG)<<8);
376
377 count = (count + 3) & ~3; /* Round up to doubleword */
378 memcpy_toio(shmem, buf, count);
379 }
380
381 #ifdef MODULE
382 #define MAX_ES_CARDS 4 /* Max number of ES3210 cards per module */
383 #define NAMELEN 8 /* # of chars for storing dev->name */
384 static struct net_device *dev_es3210[MAX_ES_CARDS];
385 static int io[MAX_ES_CARDS];
386 static int irq[MAX_ES_CARDS];
387 static int mem[MAX_ES_CARDS];
388
389 module_param_array(io, int, NULL, 0);
390 module_param_array(irq, int, NULL, 0);
391 module_param_array(mem, int, NULL, 0);
392 MODULE_PARM_DESC(io, "I/O base address(es)");
393 MODULE_PARM_DESC(irq, "IRQ number(s)");
394 MODULE_PARM_DESC(mem, "memory base address(es)");
395 MODULE_DESCRIPTION("Racal-Interlan ES3210 EISA ethernet driver");
396 MODULE_LICENSE("GPL");
397
398 int __init init_module(void)
399 {
400 struct net_device *dev;
401 int this_dev, found = 0;
402
403 for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
404 if (io[this_dev] == 0 && this_dev != 0)
405 break;
406 dev = alloc_ei_netdev();
407 if (!dev)
408 break;
409 dev->irq = irq[this_dev];
410 dev->base_addr = io[this_dev];
411 dev->mem_start = mem[this_dev];
412 if (do_es_probe(dev) == 0) {
413 dev_es3210[found++] = dev;
414 continue;
415 }
416 free_netdev(dev);
417 printk(KERN_WARNING "es3210.c: No es3210 card found (i/o = 0x%x).\n", io[this_dev]);
418 break;
419 }
420 if (found)
421 return 0;
422 return -ENXIO;
423 }
424
425 static void cleanup_card(struct net_device *dev)
426 {
427 free_irq(dev->irq, dev);
428 release_region(dev->base_addr, ES_IO_EXTENT);
429 iounmap(ei_status.mem);
430 }
431
432 void __exit
433 cleanup_module(void)
434 {
435 int this_dev;
436
437 for (this_dev = 0; this_dev < MAX_ES_CARDS; this_dev++) {
438 struct net_device *dev = dev_es3210[this_dev];
439 if (dev) {
440 unregister_netdev(dev);
441 cleanup_card(dev);
442 free_netdev(dev);
443 }
444 }
445 }
446 #endif /* MODULE */
447
448
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