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/errno.h>
34 #include <linux/pci.h>
35 #include <linux/init.h>
36 #include <linux/delay.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/jiffies.h>
40
41 #include <asm/system.h>
42 #include <asm/io.h>
43 #include <asm/setup.h>
44 #include <asm/amigaints.h>
45 #include <asm/amigahw.h>
46 #include <asm/amigayle.h>
47 #include <asm/amipcmcia.h>
48
49 #include "8390.h"
50
51 /* ---- No user-serviceable parts below ---- */
52
53 #define DRV_NAME "apne"
54
55 #define NE_BASE (dev->base_addr)
56 #define NE_CMD 0x00
57 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
58 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
59 #define NE_IO_EXTENT 0x20
60
61 #define NE_EN0_ISR 0x07
62 #define NE_EN0_DCFG 0x0e
63
64 #define NE_EN0_RSARLO 0x08
65 #define NE_EN0_RSARHI 0x09
66 #define NE_EN0_RCNTLO 0x0a
67 #define NE_EN0_RXCR 0x0c
68 #define NE_EN0_TXCR 0x0d
69 #define NE_EN0_RCNTHI 0x0b
70 #define NE_EN0_IMR 0x0f
71
72 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
73 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
74 #define NESM_START_PG 0x40 /* First page of TX buffer */
75 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
76
77
78 struct net_device * __init apne_probe(int unit);
79 static int apne_probe1(struct net_device *dev, int ioaddr);
80
81 static void apne_reset_8390(struct net_device *dev);
82 static void apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
83 int ring_page);
84 static void apne_block_input(struct net_device *dev, int count,
85 struct sk_buff *skb, int ring_offset);
86 static void apne_block_output(struct net_device *dev, const int count,
87 const unsigned char *buf, const int start_page);
88 static irqreturn_t apne_interrupt(int irq, void *dev_id);
89
90 static int init_pcmcia(void);
91
92 /* IO base address used for nic */
93
94 #define IOBASE 0x300
95
96 /*
97 use MANUAL_CONFIG and MANUAL_OFFSET for enabling IO by hand
98 you can find the values to use by looking at the cnet.device
99 config file example (the default values are for the CNET40BC card)
100 */
101
102 /*
103 #define MANUAL_CONFIG 0x20
104 #define MANUAL_OFFSET 0x3f8
105
106 #define MANUAL_HWADDR0 0x00
107 #define MANUAL_HWADDR1 0x12
108 #define MANUAL_HWADDR2 0x34
109 #define MANUAL_HWADDR3 0x56
110 #define MANUAL_HWADDR4 0x78
111 #define MANUAL_HWADDR5 0x9a
112 */
113
114 static const char version[] =
115 "apne.c:v1.1 7/10/98 Alain Malek (Alain.Malek@cryogen.ch)\n";
116
117 static int apne_owned; /* signal if card already owned */
118
apne_probe(int unit)119 struct net_device * __init apne_probe(int unit)
120 {
121 struct net_device *dev;
122 #ifndef MANUAL_CONFIG
123 char tuple[8];
124 #endif
125 int err;
126
127 if (!MACH_IS_AMIGA)
128 return ERR_PTR(-ENODEV);
129
130 if (apne_owned)
131 return ERR_PTR(-ENODEV);
132
133 if ( !(AMIGAHW_PRESENT(PCMCIA)) )
134 return ERR_PTR(-ENODEV);
135
136 printk("Looking for PCMCIA ethernet card : ");
137
138 /* check if a card is inserted */
139 if (!(PCMCIA_INSERTED)) {
140 printk("NO PCMCIA card inserted\n");
141 return ERR_PTR(-ENODEV);
142 }
143
144 dev = alloc_ei_netdev();
145 if (!dev)
146 return ERR_PTR(-ENOMEM);
147 if (unit >= 0) {
148 sprintf(dev->name, "eth%d", unit);
149 netdev_boot_setup_check(dev);
150 }
151
152 /* disable pcmcia irq for readtuple */
153 pcmcia_disable_irq();
154
155 #ifndef MANUAL_CONFIG
156 if ((pcmcia_copy_tuple(CISTPL_FUNCID, tuple, 8) < 3) ||
157 (tuple[2] != CISTPL_FUNCID_NETWORK)) {
158 printk("not an ethernet card\n");
159 /* XXX: shouldn't we re-enable irq here? */
160 free_netdev(dev);
161 return ERR_PTR(-ENODEV);
162 }
163 #endif
164
165 printk("ethernet PCMCIA card inserted\n");
166
167 if (!init_pcmcia()) {
168 /* XXX: shouldn't we re-enable irq here? */
169 free_netdev(dev);
170 return ERR_PTR(-ENODEV);
171 }
172
173 if (!request_region(IOBASE, 0x20, DRV_NAME)) {
174 free_netdev(dev);
175 return ERR_PTR(-EBUSY);
176 }
177
178 err = apne_probe1(dev, IOBASE);
179 if (err) {
180 release_region(IOBASE, 0x20);
181 free_netdev(dev);
182 return ERR_PTR(err);
183 }
184 err = register_netdev(dev);
185 if (!err)
186 return dev;
187
188 pcmcia_disable_irq();
189 free_irq(IRQ_AMIGA_PORTS, dev);
190 pcmcia_reset();
191 release_region(IOBASE, 0x20);
192 free_netdev(dev);
193 return ERR_PTR(err);
194 }
195
apne_probe1(struct net_device * dev,int ioaddr)196 static int __init apne_probe1(struct net_device *dev, int ioaddr)
197 {
198 int i;
199 unsigned char SA_prom[32];
200 int wordlength = 2;
201 const char *name = NULL;
202 int start_page, stop_page;
203 #ifndef MANUAL_HWADDR0
204 int neX000, ctron;
205 #endif
206 static unsigned version_printed;
207
208 if (ei_debug && version_printed++ == 0)
209 printk(version);
210
211 printk("PCMCIA NE*000 ethercard probe");
212
213 /* Reset card. Who knows what dain-bramaged state it was left in. */
214 { unsigned long reset_start_time = jiffies;
215
216 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
217
218 while ((inb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
219 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
220 printk(" not found (no reset ack).\n");
221 return -ENODEV;
222 }
223
224 outb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
225 }
226
227 #ifndef MANUAL_HWADDR0
228
229 /* Read the 16 bytes of station address PROM.
230 We must first initialize registers, similar to NS8390_init(eifdev, 0).
231 We can't reliably read the SAPROM address without this.
232 (I learned the hard way!). */
233 {
234 struct {unsigned long value, offset; } program_seq[] = {
235 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
236 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
237 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
238 {0x00, NE_EN0_RCNTHI},
239 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
240 {0xFF, NE_EN0_ISR},
241 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
242 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
243 {32, NE_EN0_RCNTLO},
244 {0x00, NE_EN0_RCNTHI},
245 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
246 {0x00, NE_EN0_RSARHI},
247 {E8390_RREAD+E8390_START, NE_CMD},
248 };
249 for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
250 outb(program_seq[i].value, ioaddr + program_seq[i].offset);
251 }
252
253 }
254 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
255 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
256 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
257 if (SA_prom[i] != SA_prom[i+1])
258 wordlength = 1;
259 }
260
261 /* At this point, wordlength *only* tells us if the SA_prom is doubled
262 up or not because some broken PCI cards don't respect the byte-wide
263 request in program_seq above, and hence don't have doubled up values.
264 These broken cards would otherwise be detected as an ne1000. */
265
266 if (wordlength == 2)
267 for (i = 0; i < 16; i++)
268 SA_prom[i] = SA_prom[i+i];
269
270 if (wordlength == 2) {
271 /* We must set the 8390 for word mode. */
272 outb(0x49, ioaddr + NE_EN0_DCFG);
273 start_page = NESM_START_PG;
274 stop_page = NESM_STOP_PG;
275 } else {
276 start_page = NE1SM_START_PG;
277 stop_page = NE1SM_STOP_PG;
278 }
279
280 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
281 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
282
283 /* Set up the rest of the parameters. */
284 if (neX000) {
285 name = (wordlength == 2) ? "NE2000" : "NE1000";
286 } else if (ctron) {
287 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
288 start_page = 0x01;
289 stop_page = (wordlength == 2) ? 0x40 : 0x20;
290 } else {
291 printk(" not found.\n");
292 return -ENXIO;
293
294 }
295
296 #else
297 wordlength = 2;
298 /* We must set the 8390 for word mode. */
299 outb(0x49, ioaddr + NE_EN0_DCFG);
300 start_page = NESM_START_PG;
301 stop_page = NESM_STOP_PG;
302
303 SA_prom[0] = MANUAL_HWADDR0;
304 SA_prom[1] = MANUAL_HWADDR1;
305 SA_prom[2] = MANUAL_HWADDR2;
306 SA_prom[3] = MANUAL_HWADDR3;
307 SA_prom[4] = MANUAL_HWADDR4;
308 SA_prom[5] = MANUAL_HWADDR5;
309 name = "NE2000";
310 #endif
311
312 dev->base_addr = ioaddr;
313 dev->irq = IRQ_AMIGA_PORTS;
314 dev->netdev_ops = &ei_netdev_ops;
315
316 /* Install the Interrupt handler */
317 i = request_irq(dev->irq, apne_interrupt, IRQF_SHARED, DRV_NAME, dev);
318 if (i) return i;
319
320 for(i = 0; i < ETHER_ADDR_LEN; i++)
321 dev->dev_addr[i] = SA_prom[i];
322
323 printk(" %pM\n", dev->dev_addr);
324
325 printk("%s: %s found.\n", dev->name, name);
326
327 ei_status.name = name;
328 ei_status.tx_start_page = start_page;
329 ei_status.stop_page = stop_page;
330 ei_status.word16 = (wordlength == 2);
331
332 ei_status.rx_start_page = start_page + TX_PAGES;
333
334 ei_status.reset_8390 = &apne_reset_8390;
335 ei_status.block_input = &apne_block_input;
336 ei_status.block_output = &apne_block_output;
337 ei_status.get_8390_hdr = &apne_get_8390_hdr;
338
339 NS8390_init(dev, 0);
340
341 pcmcia_ack_int(pcmcia_get_intreq()); /* ack PCMCIA int req */
342 pcmcia_enable_irq();
343
344 apne_owned = 1;
345
346 return 0;
347 }
348
349 /* Hard reset the card. This used to pause for the same period that a
350 8390 reset command required, but that shouldn't be necessary. */
351 static void
apne_reset_8390(struct net_device * dev)352 apne_reset_8390(struct net_device *dev)
353 {
354 unsigned long reset_start_time = jiffies;
355
356 init_pcmcia();
357
358 if (ei_debug > 1) printk("resetting the 8390 t=%ld...", jiffies);
359
360 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
361
362 ei_status.txing = 0;
363 ei_status.dmaing = 0;
364
365 /* This check _should_not_ be necessary, omit eventually. */
366 while ((inb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
367 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
368 printk("%s: ne_reset_8390() did not complete.\n", dev->name);
369 break;
370 }
371 outb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
372 }
373
374 /* Grab the 8390 specific header. Similar to the block_input routine, but
375 we don't need to be concerned with ring wrap as the header will be at
376 the start of a page, so we optimize accordingly. */
377
378 static void
apne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)379 apne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
380 {
381
382 int nic_base = dev->base_addr;
383 int cnt;
384 char *ptrc;
385 short *ptrs;
386
387 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
388 if (ei_status.dmaing) {
389 printk("%s: DMAing conflict in ne_get_8390_hdr "
390 "[DMAstat:%d][irqlock:%d][intr:%d].\n",
391 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
392 return;
393 }
394
395 ei_status.dmaing |= 0x01;
396 outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
397 outb(ENISR_RDC, nic_base + NE_EN0_ISR);
398 outb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
399 outb(0, nic_base + NE_EN0_RCNTHI);
400 outb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
401 outb(ring_page, nic_base + NE_EN0_RSARHI);
402 outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
403
404 if (ei_status.word16) {
405 ptrs = (short*)hdr;
406 for(cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
407 *ptrs++ = inw(NE_BASE + NE_DATAPORT);
408 } else {
409 ptrc = (char*)hdr;
410 for(cnt = 0; cnt < sizeof(struct e8390_pkt_hdr); cnt++)
411 *ptrc++ = inb(NE_BASE + NE_DATAPORT);
412 }
413
414 outb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
415 ei_status.dmaing &= ~0x01;
416
417 le16_to_cpus(&hdr->count);
418 }
419
420 /* Block input and output, similar to the Crynwr packet driver. If you
421 are porting to a new ethercard, look at the packet driver source for hints.
422 The NEx000 doesn't share the on-board packet memory -- you have to put
423 the packet out through the "remote DMA" dataport using outb. */
424
425 static void
apne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)426 apne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
427 {
428 int nic_base = dev->base_addr;
429 char *buf = skb->data;
430 char *ptrc;
431 short *ptrs;
432 int cnt;
433
434 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
435 if (ei_status.dmaing) {
436 printk("%s: DMAing conflict in ne_block_input "
437 "[DMAstat:%d][irqlock:%d][intr:%d].\n",
438 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
439 return;
440 }
441 ei_status.dmaing |= 0x01;
442 outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
443 outb(ENISR_RDC, nic_base + NE_EN0_ISR);
444 outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
445 outb(count >> 8, nic_base + NE_EN0_RCNTHI);
446 outb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
447 outb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
448 outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
449 if (ei_status.word16) {
450 ptrs = (short*)buf;
451 for (cnt = 0; cnt < (count>>1); cnt++)
452 *ptrs++ = inw(NE_BASE + NE_DATAPORT);
453 if (count & 0x01) {
454 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
455 }
456 } else {
457 ptrc = (char*)buf;
458 for (cnt = 0; cnt < count; cnt++)
459 *ptrc++ = inb(NE_BASE + NE_DATAPORT);
460 }
461
462 outb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
463 ei_status.dmaing &= ~0x01;
464 }
465
466 static void
apne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)467 apne_block_output(struct net_device *dev, int count,
468 const unsigned char *buf, const int start_page)
469 {
470 int nic_base = NE_BASE;
471 unsigned long dma_start;
472 char *ptrc;
473 short *ptrs;
474 int cnt;
475
476 /* Round the count up for word writes. Do we need to do this?
477 What effect will an odd byte count have on the 8390?
478 I should check someday. */
479 if (ei_status.word16 && (count & 0x01))
480 count++;
481
482 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
483 if (ei_status.dmaing) {
484 printk("%s: DMAing conflict in ne_block_output."
485 "[DMAstat:%d][irqlock:%d][intr:%d]\n",
486 dev->name, ei_status.dmaing, ei_status.irqlock, dev->irq);
487 return;
488 }
489 ei_status.dmaing |= 0x01;
490 /* We should already be in page 0, but to be safe... */
491 outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
492
493 outb(ENISR_RDC, nic_base + NE_EN0_ISR);
494
495 /* Now the normal output. */
496 outb(count & 0xff, nic_base + NE_EN0_RCNTLO);
497 outb(count >> 8, nic_base + NE_EN0_RCNTHI);
498 outb(0x00, nic_base + NE_EN0_RSARLO);
499 outb(start_page, nic_base + NE_EN0_RSARHI);
500
501 outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
502 if (ei_status.word16) {
503 ptrs = (short*)buf;
504 for (cnt = 0; cnt < count>>1; cnt++)
505 outw(*ptrs++, NE_BASE+NE_DATAPORT);
506 } else {
507 ptrc = (char*)buf;
508 for (cnt = 0; cnt < count; cnt++)
509 outb(*ptrc++, NE_BASE + NE_DATAPORT);
510 }
511
512 dma_start = jiffies;
513
514 while ((inb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
515 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
516 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
517 apne_reset_8390(dev);
518 NS8390_init(dev,1);
519 break;
520 }
521
522 outb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
523 ei_status.dmaing &= ~0x01;
524 }
525
apne_interrupt(int irq,void * dev_id)526 static irqreturn_t apne_interrupt(int irq, void *dev_id)
527 {
528 unsigned char pcmcia_intreq;
529
530 if (!(gayle.inten & GAYLE_IRQ_IRQ))
531 return IRQ_NONE;
532
533 pcmcia_intreq = pcmcia_get_intreq();
534
535 if (!(pcmcia_intreq & GAYLE_IRQ_IRQ)) {
536 pcmcia_ack_int(pcmcia_intreq);
537 return IRQ_NONE;
538 }
539 if (ei_debug > 3)
540 printk("pcmcia intreq = %x\n", pcmcia_intreq);
541 pcmcia_disable_irq(); /* to get rid of the sti() within ei_interrupt */
542 ei_interrupt(irq, dev_id);
543 pcmcia_ack_int(pcmcia_get_intreq());
544 pcmcia_enable_irq();
545 return IRQ_HANDLED;
546 }
547
548 #ifdef MODULE
549 static struct net_device *apne_dev;
550
apne_module_init(void)551 static int __init apne_module_init(void)
552 {
553 apne_dev = apne_probe(-1);
554 if (IS_ERR(apne_dev))
555 return PTR_ERR(apne_dev);
556 return 0;
557 }
558
apne_module_exit(void)559 static void __exit apne_module_exit(void)
560 {
561 unregister_netdev(apne_dev);
562
563 pcmcia_disable_irq();
564
565 free_irq(IRQ_AMIGA_PORTS, apne_dev);
566
567 pcmcia_reset();
568
569 release_region(IOBASE, 0x20);
570
571 free_netdev(apne_dev);
572 }
573 module_init(apne_module_init);
574 module_exit(apne_module_exit);
575 #endif
576
init_pcmcia(void)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 out_8(GAYLE_ATTRIBUTE+offset, config);
615
616 return 1;
617 }
618
619 MODULE_LICENSE("GPL");
620