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The LDT fixes in particular fix some potentially random strange behaviour.
[davej-history.git] / drivers / net / apne.c
blobec318c9747a513d4c32cba5238a97e64aee05b13
1 /*
2 * Amiga Linux/68k 8390 based PCMCIA Ethernet Driver for the Amiga 1200
3 *
4 * (C) Copyright 1997 Alain Malek
5 * (Alain.Malek@cryogen.com)
6 *
7 * ----------------------------------------------------------------------------
8 *
9 * This program is based on
10 *
11 * ne.c: A general non-shared-memory NS8390 ethernet driver for linux
12 * Written 1992-94 by Donald Becker.
13 *
14 * 8390.c: A general NS8390 ethernet driver core for linux.
15 * Written 1992-94 by Donald Becker.
16 *
17 * cnetdevice: A Sana-II ethernet driver for AmigaOS
18 * Written by Bruce Abbott (bhabbott@inhb.co.nz)
19 *
20 * ----------------------------------------------------------------------------
21 *
22 * This file is subject to the terms and conditions of the GNU General Public
23 * License. See the file COPYING in the main directory of the Linux
24 * distribution for more details.
25 *
26 * ----------------------------------------------------------------------------
27 *
28 */
29
30
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/sched.h>
34 #include <linux/errno.h>
35 #include <linux/pci.h>
36 #include <linux/init.h>
37 #include <linux/delay.h>
38 #include <asm/system.h>
39 #include <asm/io.h>
40
41 #include <linux/netdevice.h>
42 #include <linux/etherdevice.h>
43
44 #include <asm/setup.h>
45 #include <asm/amigaints.h>
46 #include <asm/amigahw.h>
47 #include <asm/amigayle.h>
48 #include <asm/amipcmcia.h>
49
50 #include "8390.h"
51
52 /* ---- No user-serviceable parts below ---- */
53
54 #define NE_BASE (dev->base_addr)
55 #define NE_CMD 0x00
56 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
57 #define NE_RESET 0x1f+GAYLE_ODD /* Issue a read to reset, a write to clear. */
58 #define NE_IO_EXTENT 0x20
59
60 #define NE_EN0_ISR 0x07+GAYLE_ODD
61 #define NE_EN0_DCFG 0x0e
62
63 #define NE_EN0_RSARLO 0x08
64 #define NE_EN0_RSARHI 0x09+GAYLE_ODD
65 #define NE_EN0_RCNTLO 0x0a
66 #define NE_EN0_RXCR 0x0c
67 #define NE_EN0_TXCR 0x0d+GAYLE_ODD
68 #define NE_EN0_RCNTHI 0x0b+GAYLE_ODD
69 #define NE_EN0_IMR 0x0f+GAYLE_ODD
70
71 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
72 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
73 #define NESM_START_PG 0x40 /* First page of TX buffer */
74 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
75
76
77 int apne_probe(struct net_device *dev);
78 static int apne_probe1(struct net_device *dev, int ioaddr);
79
80 static int apne_open(struct net_device *dev);
81 static int apne_close(struct net_device *dev);
82
83 static void apne_reset_8390(struct net_device *dev);
84 static void apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
85 int ring_page);
86 static void apne_block_input(struct net_device *dev, int count,
87 struct sk_buff *skb, int ring_offset);
88 static void apne_block_output(struct net_device *dev, const int count,
89 const unsigned char *buf, const int start_page);
90 static void apne_interrupt(int irq, void *dev_id, struct pt_regs *regs);
91
92 static int init_pcmcia(void);
93
94 /* IO base address used for nic */
95
96 #define IOBASE 0x300
97
98 /*
99 use MANUAL_CONFIG and MANUAL_OFFSET for enabling IO by hand
100 you can find the values to use by looking at the cnet.device
101 config file example (the default values are for the CNET40BC card)
102 */
103
104 /*
105 #define MANUAL_CONFIG 0x20
106 #define MANUAL_OFFSET 0x3f8
107
108 #define MANUAL_HWADDR0 0x00
109 #define MANUAL_HWADDR1 0x12
110 #define MANUAL_HWADDR2 0x34
111 #define MANUAL_HWADDR3 0x56
112 #define MANUAL_HWADDR4 0x78
113 #define MANUAL_HWADDR5 0x9a
114 */
115
116 #define WORDSWAP(a) ( (((a)>>8)&0xff) | ((a)<<8) )
117
118
119 static const char *version =
120 "apne.c:v1.1 7/10/98 Alain Malek (Alain.Malek@cryogen.ch)\n";
121
122 static int apne_owned = 0; /* signal if card already owned */
123
124 int __init apne_probe(struct net_device *dev)
125 {
126 #ifndef MANUAL_CONFIG
127 char tuple[8];
128 #endif
129
130 if (apne_owned)
131 return -ENODEV;
132
133 SET_MODULE_OWNER(dev);
134
135 if ( !(AMIGAHW_PRESENT(PCMCIA)) )
136 return (-ENODEV);
137
138 printk("Looking for PCMCIA ethernet card : ");
139
140 /* check if a card is inserted */
141 if (!(PCMCIA_INSERTED)) {
142 printk("NO PCMCIA card inserted\n");
143 return (-ENODEV);
144 }
145
146 /* disable pcmcia irq for readtuple */
147 pcmcia_disable_irq();
148
149 #ifndef MANUAL_CONFIG
150 if ((pcmcia_copy_tuple(CISTPL_FUNCID, tuple, 8) < 3) ||
151 (tuple[2] != CISTPL_FUNCID_NETWORK)) {
152 printk("not an ethernet card\n");
153 return (-ENODEV);
154 }
155 #endif
156
157 printk("ethernet PCMCIA card inserted\n");
158
159 if (init_pcmcia())
160 return apne_probe1(dev, IOBASE+GAYLE_IO);
161 else
162 return (-ENODEV);
163
164 }
165
166 static int __init apne_probe1(struct net_device *dev, int ioaddr)
167 {
168 int i;
169 unsigned char SA_prom[32];
170 int wordlength = 2;
171 const char *name = NULL;
172 int start_page, stop_page;
173 #ifndef MANUAL_HWADDR0
174 int neX000, ctron;
175 #endif
176 static unsigned version_printed = 0;
177 static u32 pcmcia_offsets[16]={
178 0, 1+GAYLE_ODD, 2, 3+GAYLE_ODD,
179 4, 5+GAYLE_ODD, 6, 7+GAYLE_ODD,
180 8, 9+GAYLE_ODD, 0xa, 0xb+GAYLE_ODD,
181 0xc, 0xd+GAYLE_ODD, 0xe, 0xf+GAYLE_ODD };
182
183 if (ei_debug && version_printed++ == 0)
184 printk(version);
185
186 printk("PCMCIA NE*000 ethercard probe");
187
188 /* Reset card. Who knows what dain-bramaged state it was left in. */
189 { unsigned long reset_start_time = jiffies;
190
191 writeb(readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
192
193 while ((readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
194 if (jiffies - reset_start_time > 2*HZ/100) {
195 printk(" not found (no reset ack).\n");
196 return -ENODEV;
197 }
198
199 writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
200 }
201
202 #ifndef MANUAL_HWADDR0
203
204 /* Read the 16 bytes of station address PROM.
205 We must first initialize registers, similar to NS8390_init(eifdev, 0).
206 We can't reliably read the SAPROM address without this.
207 (I learned the hard way!). */
208 {
209 struct {unsigned long value, offset; } program_seq[] = {
210 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
211 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
212 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
213 {0x00, NE_EN0_RCNTHI},
214 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
215 {0xFF, NE_EN0_ISR},
216 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
217 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
218 {32, NE_EN0_RCNTLO},
219 {0x00, NE_EN0_RCNTHI},
220 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
221 {0x00, NE_EN0_RSARHI},
222 {E8390_RREAD+E8390_START, NE_CMD},
223 };
224 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
225 writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
226 }
227
228 }
229 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
230 SA_prom[i] = readb(ioaddr + NE_DATAPORT);
231 SA_prom[i+1] = readb(ioaddr + NE_DATAPORT);
232 if (SA_prom[i] != SA_prom[i+1])
233 wordlength = 1;
234 }
235
236 /* At this point, wordlength *only* tells us if the SA_prom is doubled
237 up or not because some broken PCI cards don't respect the byte-wide
238 request in program_seq above, and hence don't have doubled up values.
239 These broken cards would otherwise be detected as an ne1000. */
240
241 if (wordlength == 2)
242 for (i = 0; i < 16; i++)
243 SA_prom[i] = SA_prom[i+i];
244
245 if (wordlength == 2) {
246 /* We must set the 8390 for word mode. */
247 writeb(0x49, ioaddr + NE_EN0_DCFG);
248 start_page = NESM_START_PG;
249 stop_page = NESM_STOP_PG;
250 } else {
251 start_page = NE1SM_START_PG;
252 stop_page = NE1SM_STOP_PG;
253 }
254
255 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
256 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
257
258 /* Set up the rest of the parameters. */
259 if (neX000) {
260 name = (wordlength == 2) ? "NE2000" : "NE1000";
261 } else if (ctron) {
262 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
263 start_page = 0x01;
264 stop_page = (wordlength == 2) ? 0x40 : 0x20;
265 } else {
266 printk(" not found.\n");
267 return -ENXIO;
268
269 }
270
271 #else
272 wordlength = 2;
273 /* We must set the 8390 for word mode. */
274 writeb(0x49, ioaddr + NE_EN0_DCFG);
275 start_page = NESM_START_PG;
276 stop_page = NESM_STOP_PG;
277
278 SA_prom[0] = MANUAL_HWADDR0;
279 SA_prom[1] = MANUAL_HWADDR1;
280 SA_prom[2] = MANUAL_HWADDR2;
281 SA_prom[3] = MANUAL_HWADDR3;
282 SA_prom[4] = MANUAL_HWADDR4;
283 SA_prom[5] = MANUAL_HWADDR5;
284 name = "NE2000";
285 #endif
286
287 dev->base_addr = ioaddr;
288
289 /* Install the Interrupt handler */
290 i = request_irq(IRQ_AMIGA_PORTS, apne_interrupt, SA_SHIRQ, dev->name, dev);
291 if (i) return i;
292
293 /* Allocate dev->priv and fill in 8390 specific dev fields. */
294 if (ethdev_init(dev)) {
295 printk (" unable to get memory for dev->priv.\n");
296 return -ENOMEM;
297 }
298
299 for(i = 0; i < ETHER_ADDR_LEN; i++) {
300 printk(" %2.2x", SA_prom[i]);
301 dev->dev_addr[i] = SA_prom[i];
302 }
303
304 printk("\n%s: %s found.\n", dev->name, name);
305
306 ei_status.name = name;
307 ei_status.tx_start_page = start_page;
308 ei_status.stop_page = stop_page;
309 ei_status.word16 = (wordlength == 2);
310
311 ei_status.rx_start_page = start_page + TX_PAGES;
312
313 ei_status.reset_8390 = &apne_reset_8390;
314 ei_status.block_input = &apne_block_input;
315 ei_status.block_output = &apne_block_output;
316 ei_status.get_8390_hdr = &apne_get_8390_hdr;
317 ei_status.reg_offset = pcmcia_offsets;
318 dev->open = &apne_open;
319 dev->stop = &apne_close;
320 NS8390_init(dev, 0);
321
322 pcmcia_ack_int(pcmcia_get_intreq()); /* ack PCMCIA int req */
323 pcmcia_enable_irq();
324
325 apne_owned = 1;
326
327 return 0;
328 }
329
330 static int
331 apne_open(struct net_device *dev)
332 {
333 ei_open(dev);
334 return 0;
335 }
336
337 static int
338 apne_close(struct net_device *dev)
339 {
340 if (ei_debug > 1)
341 printk("%s: Shutting down ethercard.\n", dev->name);
342 ei_close(dev);
343 return 0;
344 }
345
346 /* Hard reset the card. This used to pause for the same period that a
347 8390 reset command required, but that shouldn't be necessary. */
348 static void
349 apne_reset_8390(struct net_device *dev)
350 {
351 unsigned long reset_start_time = jiffies;
352
353 init_pcmcia();
354
355 if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
356
357 writeb(readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
358
359 ei_status.txing = 0;
360 ei_status.dmaing = 0;
361
362 /* This check _should_not_ be necessary, omit eventually. */
363 while ((readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
364 if (jiffies - reset_start_time > 2*HZ/100) {
365 printk("%s: ne_reset_8390() did not complete.\n", dev->name);
366 break;
367 }
368 writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
369 }
370
371 /* Grab the 8390 specific header. Similar to the block_input routine, but
372 we don't need to be concerned with ring wrap as the header will be at
373 the start of a page, so we optimize accordingly. */
374
375 static void
376 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
377 {
378
379 int nic_base = dev->base_addr;
380 int cnt;
381 char *ptrc;
382 short *ptrs;
383
384 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
385 if (ei_status.dmaing) {
386 printk("%s: DMAing conflict in ne_get_8390_hdr "
387 "[DMAstat:%d][irqlock:%d][intr:%d].\n",
388 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
389 return;
390 }
391
392 ei_status.dmaing |= 0x01;
393 writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
394 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
395 writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
396 writeb(0, nic_base + NE_EN0_RCNTHI);
397 writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
398 writeb(ring_page, nic_base + NE_EN0_RSARHI);
399 writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
400
401 if (ei_status.word16) {
402 ptrs = (short*)hdr;
403 for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
404 *ptrs++ = readw(NE_BASE + NE_DATAPORT);
405 } else {
406 ptrc = (char*)hdr;
407 for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
408 *ptrc++ = readb(NE_BASE + NE_DATAPORT);
409 }
410
411 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
412
413 hdr->count = WORDSWAP(hdr->count);
414
415 ei_status.dmaing &= ~0x01;
416 }
417
418 /* Block input and output, similar to the Crynwr packet driver. If you
419 are porting to a new ethercard, look at the packet driver source for hints.
420 The NEx000 doesn't share the on-board packet memory -- you have to put
421 the packet out through the "remote DMA" dataport using writeb. */
422
423 static void
424 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
425 {
426 int nic_base = dev->base_addr;
427 char *buf = skb->data;
428 char *ptrc;
429 short *ptrs;
430 int cnt;
431
432 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
433 if (ei_status.dmaing) {
434 printk("%s: DMAing conflict in ne_block_input "
435 "[DMAstat:%d][irqlock:%d][intr:%d].\n",
436 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
437 return;
438 }
439 ei_status.dmaing |= 0x01;
440 writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
441 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
442 writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
443 writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
444 writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
445 writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
446 writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
447 if (ei_status.word16) {
448 ptrs = (short*)buf;
449 for (cnt = 0; cnt < (count>>1); cnt++)
450 *ptrs++ = readw(NE_BASE + NE_DATAPORT);
451 if (count & 0x01) {
452 buf[count-1] = readb(NE_BASE + NE_DATAPORT);
453 }
454 } else {
455 ptrc = (char*)buf;
456 for (cnt = 0; cnt < count; cnt++)
457 *ptrc++ = readb(NE_BASE + NE_DATAPORT);
458 }
459
460 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
461 ei_status.dmaing &= ~0x01;
462 }
463
464 static void
465 apne_block_output(struct net_device *dev, int count,
466 const unsigned char *buf, const int start_page)
467 {
468 int nic_base = NE_BASE;
469 unsigned long dma_start;
470 char *ptrc;
471 short *ptrs;
472 int cnt;
473
474 /* Round the count up for word writes. Do we need to do this?
475 What effect will an odd byte count have on the 8390?
476 I should check someday. */
477 if (ei_status.word16 && (count & 0x01))
478 count++;
479
480 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
481 if (ei_status.dmaing) {
482 printk("%s: DMAing conflict in ne_block_output."
483 "[DMAstat:%d][irqlock:%d][intr:%d]\n",
484 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
485 return;
486 }
487 ei_status.dmaing |= 0x01;
488 /* We should already be in page 0, but to be safe... */
489 writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
490
491 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
492
493 /* Now the normal output. */
494 writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
495 writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
496 writeb(0x00, nic_base + NE_EN0_RSARLO);
497 writeb(start_page, nic_base + NE_EN0_RSARHI);
498
499 writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
500 if (ei_status.word16) {
501 ptrs = (short*)buf;
502 for (cnt = 0; cnt < count>>1; cnt++)
503 writew(*ptrs++, NE_BASE+NE_DATAPORT);
504 } else {
505 ptrc = (char*)buf;
506 for (cnt = 0; cnt < count; cnt++)
507 writeb(*ptrc++, NE_BASE + NE_DATAPORT);
508 }
509
510 dma_start = jiffies;
511
512 while ((readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
513 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
514 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
515 apne_reset_8390(dev);
516 NS8390_init(dev,1);
517 break;
518 }
519
520 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
521 ei_status.dmaing &= ~0x01;
522 return;
523 }
524
525 static void apne_interrupt(int irq, void *dev_id, struct pt_regs *regs)
526 {
527 unsigned char pcmcia_intreq;
528
529 if (!(gayle.inten & GAYLE_IRQ_IRQ))
530 return;
531
532 pcmcia_intreq = pcmcia_get_intreq();
533
534 if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
535 pcmcia_ack_int(pcmcia_intreq);
536 return;
537 }
538 if (ei_debug > 3)
539 printk("pcmcia intreq = %x\n", pcmcia_intreq);
540 pcmcia_disable_irq(); /* to get rid of the sti() within ei_interrupt */
541 ei_interrupt(irq, dev_id, regs);
542 pcmcia_ack_int(pcmcia_get_intreq());
543 pcmcia_enable_irq();
544 }
545
546 #ifdef MODULE
547 static struct net_device apne_dev;
548
549 int init_module(void)
550 {
551 int err;
552
553 apne_dev.init = apne_probe;
554 if ((err = register_netdev(&apne_dev))) {
555 if (err == -EIO)
556 printk("No PCMCIA NEx000 ethernet card found.\n");
557 return (err);
558 }
559 return (0);
560 }
561
562 void cleanup_module(void)
563 {
564 unregister_netdev(&apne_dev);
565
566 pcmcia_disable_irq();
567
568 free_irq(IRQ_AMIGA_PORTS, &apne_dev);
569
570 pcmcia_reset();
571
572 apne_owned = 0;
573 }
574
575 #endif
576
577 static int init_pcmcia(void)
578 {
579 u_char config;
580 #ifndef MANUAL_CONFIG
581 u_char tuple[32];
582 int offset_len;
583 #endif
584 u_long offset;
585
586 pcmcia_reset();
587 pcmcia_program_voltage(PCMCIA_0V);
588 pcmcia_access_speed(PCMCIA_SPEED_250NS);
589 pcmcia_write_enable();
590
591 #ifdef MANUAL_CONFIG
592 config = MANUAL_CONFIG;
593 #else
594 /* get and write config byte to enable IO port */
595
596 if (pcmcia_copy_tuple(CISTPL_CFTABLE_ENTRY, tuple, 32) < 3)
597 return 0;
598
599 config = tuple[2] & 0x3f;
600 #endif
601 #ifdef MANUAL_OFFSET
602 offset = MANUAL_OFFSET;
603 #else
604 if (pcmcia_copy_tuple(CISTPL_CONFIG, tuple, 32) < 6)
605 return 0;
606
607 offset_len = (tuple[2] & 0x3) + 1;
608 offset = 0;
609 while(offset_len--) {
610 offset = (offset << 8) | tuple[4+offset_len];
611 }
612 #endif
613
614 writeb(config, GAYLE_ATTRIBUTE+offset);
615
616 return 1;
617 }
Copy of Dave Jones history.git as used by http://archive.org/details/git-history-of-linux