1 // SPDX-License-Identifier: GPL-1.0+
2 /* mac8390.c: New driver for 8390-based Nubus (or Nubus-alike)
3    Ethernet cards on Linux */
4 /* Based on the former daynaport.c driver, by Alan Cox.  Some code
5    taken from or inspired by skeleton.c by Donald Becker, acenic.c by
6    Jes Sorensen, and ne2k-pci.c by Donald Becker and Paul Gortmaker. */
7 
8 /* 2000-02-28: support added for Dayna and Kinetics cards by
9    A.G.deWijn@phys.uu.nl */
10 /* 2000-04-04: support added for Dayna2 by bart@etpmod.phys.tue.nl */
11 /* 2001-04-18: support for DaynaPort E/LC-M by rayk@knightsmanor.org */
12 /* 2001-05-15: support for Cabletron ported from old daynaport driver
13  * and fixed access to Sonic Sys card which masquerades as a Farallon
14  * by rayk@knightsmanor.org */
15 /* 2002-12-30: Try to support more cards, some clues from NetBSD driver */
16 /* 2003-12-26: Make sure Asante cards always work. */
17 
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19 
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/types.h>
23 #include <linux/fcntl.h>
24 #include <linux/interrupt.h>
25 #include <linux/ptrace.h>
26 #include <linux/ioport.h>
27 #include <linux/nubus.h>
28 #include <linux/in.h>
29 #include <linux/string.h>
30 #include <linux/errno.h>
31 #include <linux/init.h>
32 #include <linux/netdevice.h>
33 #include <linux/etherdevice.h>
34 #include <linux/skbuff.h>
35 #include <linux/bitops.h>
36 #include <linux/io.h>
37 
38 #include <asm/dma.h>
39 #include <asm/hwtest.h>
40 #include <asm/macints.h>
41 
42 static char version[] =
43 	"v0.4 2001-05-15 David Huggins-Daines <dhd@debian.org> and others\n";
44 
45 #define EI_SHIFT(x)	(ei_local->reg_offset[x])
46 #define ei_inb(port)	in_8(port)
47 #define ei_outb(val, port)	out_8(port, val)
48 #define ei_inb_p(port)	in_8(port)
49 #define ei_outb_p(val, port)	out_8(port, val)
50 
51 #include "lib8390.c"
52 
53 #define WD_START_PG			0x00	/* First page of TX buffer */
54 #define CABLETRON_RX_START_PG		0x00    /* First page of RX buffer */
55 #define CABLETRON_RX_STOP_PG		0x30    /* Last page +1 of RX ring */
56 #define CABLETRON_TX_START_PG		CABLETRON_RX_STOP_PG
57 						/* First page of TX buffer */
58 
59 /*
60  * Unfortunately it seems we have to hardcode these for the moment
61  * Shouldn't the card know about this?
62  * Does anyone know where to read it off the card?
63  * Do we trust the data provided by the card?
64  */
65 
66 #define DAYNA_8390_BASE		0x80000
67 #define DAYNA_8390_MEM		0x00000
68 
69 #define CABLETRON_8390_BASE	0x90000
70 #define CABLETRON_8390_MEM	0x00000
71 
72 #define INTERLAN_8390_BASE	0xE0000
73 #define INTERLAN_8390_MEM	0xD0000
74 
75 enum mac8390_type {
76 	MAC8390_NONE = -1,
77 	MAC8390_APPLE,
78 	MAC8390_ASANTE,
79 	MAC8390_FARALLON,
80 	MAC8390_CABLETRON,
81 	MAC8390_DAYNA,
82 	MAC8390_INTERLAN,
83 	MAC8390_KINETICS,
84 };
85 
86 static const char *cardname[] = {
87 	"apple",
88 	"asante",
89 	"farallon",
90 	"cabletron",
91 	"dayna",
92 	"interlan",
93 	"kinetics",
94 };
95 
96 static const int word16[] = {
97 	1, /* apple */
98 	1, /* asante */
99 	1, /* farallon */
100 	1, /* cabletron */
101 	0, /* dayna */
102 	1, /* interlan */
103 	0, /* kinetics */
104 };
105 
106 /* on which cards do we use NuBus resources? */
107 static const int useresources[] = {
108 	1, /* apple */
109 	1, /* asante */
110 	1, /* farallon */
111 	0, /* cabletron */
112 	0, /* dayna */
113 	0, /* interlan */
114 	0, /* kinetics */
115 };
116 
117 enum mac8390_access {
118 	ACCESS_UNKNOWN = 0,
119 	ACCESS_32,
120 	ACCESS_16,
121 };
122 
123 extern int mac8390_memtest(struct net_device *dev);
124 static int mac8390_initdev(struct net_device *dev, struct nubus_board *board,
125 			   enum mac8390_type type);
126 
127 static int mac8390_open(struct net_device *dev);
128 static int mac8390_close(struct net_device *dev);
129 static void mac8390_no_reset(struct net_device *dev);
130 static void interlan_reset(struct net_device *dev);
131 
132 /* Sane (32-bit chunk memory read/write) - Some Farallon and Apple do this*/
133 static void sane_get_8390_hdr(struct net_device *dev,
134 			      struct e8390_pkt_hdr *hdr, int ring_page);
135 static void sane_block_input(struct net_device *dev, int count,
136 			     struct sk_buff *skb, int ring_offset);
137 static void sane_block_output(struct net_device *dev, int count,
138 			      const unsigned char *buf, const int start_page);
139 
140 /* dayna_memcpy to and from card */
141 static void dayna_memcpy_fromcard(struct net_device *dev, void *to,
142 				int from, int count);
143 static void dayna_memcpy_tocard(struct net_device *dev, int to,
144 			      const void *from, int count);
145 
146 /* Dayna - Dayna/Kinetics use this */
147 static void dayna_get_8390_hdr(struct net_device *dev,
148 			       struct e8390_pkt_hdr *hdr, int ring_page);
149 static void dayna_block_input(struct net_device *dev, int count,
150 			      struct sk_buff *skb, int ring_offset);
151 static void dayna_block_output(struct net_device *dev, int count,
152 			       const unsigned char *buf, int start_page);
153 
154 /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
155 static void slow_sane_get_8390_hdr(struct net_device *dev,
156 				   struct e8390_pkt_hdr *hdr, int ring_page);
157 static void slow_sane_block_input(struct net_device *dev, int count,
158 				  struct sk_buff *skb, int ring_offset);
159 static void slow_sane_block_output(struct net_device *dev, int count,
160 				   const unsigned char *buf, int start_page);
161 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count);
162 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count);
163 
mac8390_ident(struct nubus_rsrc * fres)164 static enum mac8390_type mac8390_ident(struct nubus_rsrc *fres)
165 {
166 	switch (fres->dr_sw) {
167 	case NUBUS_DRSW_3COM:
168 		switch (fres->dr_hw) {
169 		case NUBUS_DRHW_APPLE_SONIC_NB:
170 		case NUBUS_DRHW_APPLE_SONIC_LC:
171 		case NUBUS_DRHW_SONNET:
172 			return MAC8390_NONE;
173 		default:
174 			return MAC8390_APPLE;
175 		}
176 
177 	case NUBUS_DRSW_APPLE:
178 		switch (fres->dr_hw) {
179 		case NUBUS_DRHW_ASANTE_LC:
180 			return MAC8390_NONE;
181 		case NUBUS_DRHW_CABLETRON:
182 			return MAC8390_CABLETRON;
183 		default:
184 			return MAC8390_APPLE;
185 		}
186 
187 	case NUBUS_DRSW_ASANTE:
188 		return MAC8390_ASANTE;
189 
190 	case NUBUS_DRSW_TECHWORKS:
191 	case NUBUS_DRSW_DAYNA2:
192 	case NUBUS_DRSW_DAYNA_LC:
193 		if (fres->dr_hw == NUBUS_DRHW_CABLETRON)
194 			return MAC8390_CABLETRON;
195 		else
196 			return MAC8390_APPLE;
197 
198 	case NUBUS_DRSW_FARALLON:
199 		return MAC8390_FARALLON;
200 
201 	case NUBUS_DRSW_KINETICS:
202 		switch (fres->dr_hw) {
203 		case NUBUS_DRHW_INTERLAN:
204 			return MAC8390_INTERLAN;
205 		default:
206 			return MAC8390_KINETICS;
207 		}
208 
209 	case NUBUS_DRSW_DAYNA:
210 		/*
211 		 * These correspond to Dayna Sonic cards
212 		 * which use the macsonic driver
213 		 */
214 		if (fres->dr_hw == NUBUS_DRHW_SMC9194 ||
215 		    fres->dr_hw == NUBUS_DRHW_INTERLAN)
216 			return MAC8390_NONE;
217 		else
218 			return MAC8390_DAYNA;
219 	}
220 	return MAC8390_NONE;
221 }
222 
mac8390_testio(unsigned long membase)223 static enum mac8390_access mac8390_testio(unsigned long membase)
224 {
225 	u32 outdata = 0xA5A0B5B0;
226 	u32 indata = 0;
227 
228 	/* Try writing 32 bits */
229 	nubus_writel(outdata, membase);
230 	/* Now read it back */
231 	indata = nubus_readl(membase);
232 	if (outdata == indata)
233 		return ACCESS_32;
234 
235 	outdata = 0xC5C0D5D0;
236 	indata = 0;
237 
238 	/* Write 16 bit output */
239 	word_memcpy_tocard(membase, &outdata, 4);
240 	/* Now read it back */
241 	word_memcpy_fromcard(&indata, membase, 4);
242 	if (outdata == indata)
243 		return ACCESS_16;
244 
245 	return ACCESS_UNKNOWN;
246 }
247 
mac8390_memsize(unsigned long membase)248 static int mac8390_memsize(unsigned long membase)
249 {
250 	unsigned long flags;
251 	int i, j;
252 
253 	local_irq_save(flags);
254 	/* Check up to 32K in 4K increments */
255 	for (i = 0; i < 8; i++) {
256 		volatile unsigned short *m = (unsigned short *)(membase + (i * 0x1000));
257 
258 		/* Unwriteable - we have a fully decoded card and the
259 		   RAM end located */
260 		if (hwreg_present(m) == 0)
261 			break;
262 
263 		/* write a distinctive byte */
264 		*m = 0xA5A0 | i;
265 		/* check that we read back what we wrote */
266 		if (*m != (0xA5A0 | i))
267 			break;
268 
269 		/* check for partial decode and wrap */
270 		for (j = 0; j < i; j++) {
271 			volatile unsigned short *p = (unsigned short *)(membase + (j * 0x1000));
272 			if (*p != (0xA5A0 | j))
273 				break;
274 		}
275 	}
276 	local_irq_restore(flags);
277 	/*
278 	 * in any case, we stopped once we tried one block too many,
279 	 * or once we reached 32K
280 	 */
281 	return i * 0x1000;
282 }
283 
mac8390_rsrc_init(struct net_device * dev,struct nubus_rsrc * fres,enum mac8390_type cardtype)284 static bool mac8390_rsrc_init(struct net_device *dev,
285 			      struct nubus_rsrc *fres,
286 			      enum mac8390_type cardtype)
287 {
288 	struct nubus_board *board = fres->board;
289 	struct nubus_dir dir;
290 	struct nubus_dirent ent;
291 	int offset;
292 	volatile unsigned short *i;
293 	u8 addr[ETH_ALEN];
294 
295 	dev->irq = SLOT2IRQ(board->slot);
296 	/* This is getting to be a habit */
297 	dev->base_addr = board->slot_addr | ((board->slot & 0xf) << 20);
298 
299 	/*
300 	 * Get some Nubus info - we will trust the card's idea
301 	 * of where its memory and registers are.
302 	 */
303 
304 	if (nubus_get_func_dir(fres, &dir) == -1) {
305 		dev_err(&board->dev,
306 			"Unable to get Nubus functional directory\n");
307 		return false;
308 	}
309 
310 	/* Get the MAC address */
311 	if (nubus_find_rsrc(&dir, NUBUS_RESID_MAC_ADDRESS, &ent) == -1) {
312 		dev_info(&board->dev, "MAC address resource not found\n");
313 		return false;
314 	}
315 
316 	nubus_get_rsrc_mem(addr, &ent, 6);
317 	eth_hw_addr_set(dev, addr);
318 
319 	if (useresources[cardtype] == 1) {
320 		nubus_rewinddir(&dir);
321 		if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_BASEOS,
322 				    &ent) == -1) {
323 			dev_err(&board->dev,
324 				"Memory offset resource not found\n");
325 			return false;
326 		}
327 		nubus_get_rsrc_mem(&offset, &ent, 4);
328 		dev->mem_start = dev->base_addr + offset;
329 		/* yes, this is how the Apple driver does it */
330 		dev->base_addr = dev->mem_start + 0x10000;
331 		nubus_rewinddir(&dir);
332 		if (nubus_find_rsrc(&dir, NUBUS_RESID_MINOR_LENGTH,
333 				    &ent) == -1) {
334 			dev_info(&board->dev,
335 				 "Memory length resource not found, probing\n");
336 			offset = mac8390_memsize(dev->mem_start);
337 		} else {
338 			nubus_get_rsrc_mem(&offset, &ent, 4);
339 		}
340 		dev->mem_end = dev->mem_start + offset;
341 	} else {
342 		switch (cardtype) {
343 		case MAC8390_KINETICS:
344 		case MAC8390_DAYNA: /* it's the same */
345 			dev->base_addr = (int)(board->slot_addr +
346 					       DAYNA_8390_BASE);
347 			dev->mem_start = (int)(board->slot_addr +
348 					       DAYNA_8390_MEM);
349 			dev->mem_end = dev->mem_start +
350 				       mac8390_memsize(dev->mem_start);
351 			break;
352 		case MAC8390_INTERLAN:
353 			dev->base_addr = (int)(board->slot_addr +
354 					       INTERLAN_8390_BASE);
355 			dev->mem_start = (int)(board->slot_addr +
356 					       INTERLAN_8390_MEM);
357 			dev->mem_end = dev->mem_start +
358 				       mac8390_memsize(dev->mem_start);
359 			break;
360 		case MAC8390_CABLETRON:
361 			dev->base_addr = (int)(board->slot_addr +
362 					       CABLETRON_8390_BASE);
363 			dev->mem_start = (int)(board->slot_addr +
364 					       CABLETRON_8390_MEM);
365 			/* The base address is unreadable if 0x00
366 			 * has been written to the command register
367 			 * Reset the chip by writing E8390_NODMA +
368 			 *   E8390_PAGE0 + E8390_STOP just to be
369 			 *   sure
370 			 */
371 			i = (void *)dev->base_addr;
372 			*i = 0x21;
373 			dev->mem_end = dev->mem_start +
374 				       mac8390_memsize(dev->mem_start);
375 			break;
376 
377 		default:
378 			dev_err(&board->dev,
379 				"No known base address for card type\n");
380 			return false;
381 		}
382 	}
383 
384 	return true;
385 }
386 
mac8390_device_probe(struct nubus_board * board)387 static int mac8390_device_probe(struct nubus_board *board)
388 {
389 	struct net_device *dev;
390 	int err = -ENODEV;
391 	struct nubus_rsrc *fres;
392 	enum mac8390_type cardtype = MAC8390_NONE;
393 
394 	dev = ____alloc_ei_netdev(0);
395 	if (!dev)
396 		return -ENOMEM;
397 
398 	SET_NETDEV_DEV(dev, &board->dev);
399 
400 	for_each_board_func_rsrc(board, fres) {
401 		if (fres->category != NUBUS_CAT_NETWORK ||
402 		    fres->type != NUBUS_TYPE_ETHERNET)
403 			continue;
404 
405 		cardtype = mac8390_ident(fres);
406 		if (cardtype == MAC8390_NONE)
407 			continue;
408 
409 		if (mac8390_rsrc_init(dev, fres, cardtype))
410 			break;
411 	}
412 	if (!fres)
413 		goto out;
414 
415 	err = mac8390_initdev(dev, board, cardtype);
416 	if (err)
417 		goto out;
418 
419 	err = register_netdev(dev);
420 	if (err)
421 		goto out;
422 
423 	nubus_set_drvdata(board, dev);
424 	return 0;
425 
426 out:
427 	free_netdev(dev);
428 	return err;
429 }
430 
mac8390_device_remove(struct nubus_board * board)431 static void mac8390_device_remove(struct nubus_board *board)
432 {
433 	struct net_device *dev = nubus_get_drvdata(board);
434 
435 	unregister_netdev(dev);
436 	free_netdev(dev);
437 }
438 
439 static struct nubus_driver mac8390_driver = {
440 	.probe = mac8390_device_probe,
441 	.remove = mac8390_device_remove,
442 	.driver = {
443 		.name = KBUILD_MODNAME,
444 		.owner = THIS_MODULE,
445 	}
446 };
447 
448 MODULE_AUTHOR("David Huggins-Daines <dhd@debian.org> and others");
449 MODULE_DESCRIPTION("Macintosh NS8390-based Nubus Ethernet driver");
450 MODULE_LICENSE("GPL");
451 
mac8390_init(void)452 static int __init mac8390_init(void)
453 {
454 	return nubus_driver_register(&mac8390_driver);
455 }
456 module_init(mac8390_init);
457 
mac8390_exit(void)458 static void __exit mac8390_exit(void)
459 {
460 	nubus_driver_unregister(&mac8390_driver);
461 }
462 module_exit(mac8390_exit);
463 
464 static const struct net_device_ops mac8390_netdev_ops = {
465 	.ndo_open 		= mac8390_open,
466 	.ndo_stop		= mac8390_close,
467 	.ndo_start_xmit		= __ei_start_xmit,
468 	.ndo_tx_timeout		= __ei_tx_timeout,
469 	.ndo_get_stats		= __ei_get_stats,
470 	.ndo_set_rx_mode	= __ei_set_multicast_list,
471 	.ndo_validate_addr	= eth_validate_addr,
472 	.ndo_set_mac_address 	= eth_mac_addr,
473 #ifdef CONFIG_NET_POLL_CONTROLLER
474 	.ndo_poll_controller	= __ei_poll,
475 #endif
476 };
477 
mac8390_initdev(struct net_device * dev,struct nubus_board * board,enum mac8390_type type)478 static int mac8390_initdev(struct net_device *dev, struct nubus_board *board,
479 			   enum mac8390_type type)
480 {
481 	static u32 fwrd4_offsets[16] = {
482 		0,      4,      8,      12,
483 		16,     20,     24,     28,
484 		32,     36,     40,     44,
485 		48,     52,     56,     60
486 	};
487 	static u32 back4_offsets[16] = {
488 		60,     56,     52,     48,
489 		44,     40,     36,     32,
490 		28,     24,     20,     16,
491 		12,     8,      4,      0
492 	};
493 	static u32 fwrd2_offsets[16] = {
494 		0,      2,      4,      6,
495 		8,     10,     12,     14,
496 		16,    18,     20,     22,
497 		24,    26,     28,     30
498 	};
499 
500 	int access_bitmode = 0;
501 
502 	/* Now fill in our stuff */
503 	dev->netdev_ops = &mac8390_netdev_ops;
504 
505 	/* GAR, ei_status is actually a macro even though it looks global */
506 	ei_status.name = cardname[type];
507 	ei_status.word16 = word16[type];
508 
509 	/* Cabletron's TX/RX buffers are backwards */
510 	if (type == MAC8390_CABLETRON) {
511 		ei_status.tx_start_page = CABLETRON_TX_START_PG;
512 		ei_status.rx_start_page = CABLETRON_RX_START_PG;
513 		ei_status.stop_page = CABLETRON_RX_STOP_PG;
514 		ei_status.rmem_start = dev->mem_start;
515 		ei_status.rmem_end = dev->mem_start + CABLETRON_RX_STOP_PG*256;
516 	} else {
517 		ei_status.tx_start_page = WD_START_PG;
518 		ei_status.rx_start_page = WD_START_PG + TX_PAGES;
519 		ei_status.stop_page = (dev->mem_end - dev->mem_start)/256;
520 		ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
521 		ei_status.rmem_end = dev->mem_end;
522 	}
523 
524 	/* Fill in model-specific information and functions */
525 	switch (type) {
526 	case MAC8390_FARALLON:
527 	case MAC8390_APPLE:
528 		switch (mac8390_testio(dev->mem_start)) {
529 		case ACCESS_UNKNOWN:
530 			dev_err(&board->dev,
531 				"Don't know how to access card memory\n");
532 			return -ENODEV;
533 
534 		case ACCESS_16:
535 			/* 16 bit card, register map is reversed */
536 			ei_status.reset_8390 = mac8390_no_reset;
537 			ei_status.block_input = slow_sane_block_input;
538 			ei_status.block_output = slow_sane_block_output;
539 			ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
540 			ei_status.reg_offset = back4_offsets;
541 			break;
542 
543 		case ACCESS_32:
544 			/* 32 bit card, register map is reversed */
545 			ei_status.reset_8390 = mac8390_no_reset;
546 			ei_status.block_input = sane_block_input;
547 			ei_status.block_output = sane_block_output;
548 			ei_status.get_8390_hdr = sane_get_8390_hdr;
549 			ei_status.reg_offset = back4_offsets;
550 			access_bitmode = 1;
551 			break;
552 		}
553 		break;
554 
555 	case MAC8390_ASANTE:
556 		/* Some Asante cards pass the 32 bit test
557 		 * but overwrite system memory when run at 32 bit.
558 		 * so we run them all at 16 bit.
559 		 */
560 		ei_status.reset_8390 = mac8390_no_reset;
561 		ei_status.block_input = slow_sane_block_input;
562 		ei_status.block_output = slow_sane_block_output;
563 		ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
564 		ei_status.reg_offset = back4_offsets;
565 		break;
566 
567 	case MAC8390_CABLETRON:
568 		/* 16 bit card, register map is short forward */
569 		ei_status.reset_8390 = mac8390_no_reset;
570 		ei_status.block_input = slow_sane_block_input;
571 		ei_status.block_output = slow_sane_block_output;
572 		ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
573 		ei_status.reg_offset = fwrd2_offsets;
574 		break;
575 
576 	case MAC8390_DAYNA:
577 	case MAC8390_KINETICS:
578 		/* 16 bit memory, register map is forward */
579 		/* dayna and similar */
580 		ei_status.reset_8390 = mac8390_no_reset;
581 		ei_status.block_input = dayna_block_input;
582 		ei_status.block_output = dayna_block_output;
583 		ei_status.get_8390_hdr = dayna_get_8390_hdr;
584 		ei_status.reg_offset = fwrd4_offsets;
585 		break;
586 
587 	case MAC8390_INTERLAN:
588 		/* 16 bit memory, register map is forward */
589 		ei_status.reset_8390 = interlan_reset;
590 		ei_status.block_input = slow_sane_block_input;
591 		ei_status.block_output = slow_sane_block_output;
592 		ei_status.get_8390_hdr = slow_sane_get_8390_hdr;
593 		ei_status.reg_offset = fwrd4_offsets;
594 		break;
595 
596 	default:
597 		dev_err(&board->dev, "Unsupported card type\n");
598 		return -ENODEV;
599 	}
600 
601 	__NS8390_init(dev, 0);
602 
603 	/* Good, done, now spit out some messages */
604 	dev_info(&board->dev, "%s (type %s)\n", board->name, cardname[type]);
605 	dev_info(&board->dev, "MAC %pM, IRQ %d, %d KB shared memory at %#lx, %d-bit access.\n",
606 		 dev->dev_addr, dev->irq,
607 		 (unsigned int)(dev->mem_end - dev->mem_start) >> 10,
608 		 dev->mem_start, access_bitmode ? 32 : 16);
609 	return 0;
610 }
611 
mac8390_open(struct net_device * dev)612 static int mac8390_open(struct net_device *dev)
613 {
614 	int err;
615 
616 	__ei_open(dev);
617 	err = request_irq(dev->irq, __ei_interrupt, 0, "8390 Ethernet", dev);
618 	if (err)
619 		pr_err("%s: unable to get IRQ %d\n", dev->name, dev->irq);
620 	return err;
621 }
622 
mac8390_close(struct net_device * dev)623 static int mac8390_close(struct net_device *dev)
624 {
625 	free_irq(dev->irq, dev);
626 	__ei_close(dev);
627 	return 0;
628 }
629 
mac8390_no_reset(struct net_device * dev)630 static void mac8390_no_reset(struct net_device *dev)
631 {
632 	struct ei_device *ei_local = netdev_priv(dev);
633 
634 	ei_status.txing = 0;
635 	netif_info(ei_local, hw, dev, "reset not supported\n");
636 }
637 
interlan_reset(struct net_device * dev)638 static void interlan_reset(struct net_device *dev)
639 {
640 	unsigned char *target = nubus_slot_addr(IRQ2SLOT(dev->irq));
641 	struct ei_device *ei_local = netdev_priv(dev);
642 
643 	netif_info(ei_local, hw, dev, "Need to reset the NS8390 t=%lu...",
644 		   jiffies);
645 	ei_status.txing = 0;
646 	target[0xC0000] = 0;
647 	if (netif_msg_hw(ei_local))
648 		pr_cont("reset complete\n");
649 }
650 
651 /* dayna_memcpy_fromio/dayna_memcpy_toio */
652 /* directly from daynaport.c by Alan Cox */
dayna_memcpy_fromcard(struct net_device * dev,void * to,int from,int count)653 static void dayna_memcpy_fromcard(struct net_device *dev, void *to, int from,
654 				  int count)
655 {
656 	volatile unsigned char *ptr;
657 	unsigned char *target = to;
658 	from <<= 1;	/* word, skip overhead */
659 	ptr = (unsigned char *)(dev->mem_start+from);
660 	/* Leading byte? */
661 	if (from & 2) {
662 		*target++ = ptr[-1];
663 		ptr += 2;
664 		count--;
665 	}
666 	while (count >= 2) {
667 		*(unsigned short *)target = *(unsigned short volatile *)ptr;
668 		ptr += 4;			/* skip cruft */
669 		target += 2;
670 		count -= 2;
671 	}
672 	/* Trailing byte? */
673 	if (count)
674 		*target = *ptr;
675 }
676 
dayna_memcpy_tocard(struct net_device * dev,int to,const void * from,int count)677 static void dayna_memcpy_tocard(struct net_device *dev, int to,
678 				const void *from, int count)
679 {
680 	volatile unsigned short *ptr;
681 	const unsigned char *src = from;
682 	to <<= 1;	/* word, skip overhead */
683 	ptr = (unsigned short *)(dev->mem_start+to);
684 	/* Leading byte? */
685 	if (to & 2) {		/* avoid a byte write (stomps on other data) */
686 		ptr[-1] = (ptr[-1]&0xFF00)|*src++;
687 		ptr++;
688 		count--;
689 	}
690 	while (count >= 2) {
691 		*ptr++ = *(unsigned short *)src;	/* Copy and */
692 		ptr++;			/* skip cruft */
693 		src += 2;
694 		count -= 2;
695 	}
696 	/* Trailing byte? */
697 	if (count) {
698 		/* card doesn't like byte writes */
699 		*ptr = (*ptr & 0x00FF) | (*src << 8);
700 	}
701 }
702 
703 /* sane block input/output */
sane_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)704 static void sane_get_8390_hdr(struct net_device *dev,
705 			      struct e8390_pkt_hdr *hdr, int ring_page)
706 {
707 	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
708 	memcpy_fromio(hdr, (void __iomem *)dev->mem_start + hdr_start, 4);
709 	/* Fix endianness */
710 	hdr->count = swab16(hdr->count);
711 }
712 
sane_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)713 static void sane_block_input(struct net_device *dev, int count,
714 			     struct sk_buff *skb, int ring_offset)
715 {
716 	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
717 	unsigned long xfer_start = xfer_base + dev->mem_start;
718 
719 	if (xfer_start + count > ei_status.rmem_end) {
720 		/* We must wrap the input move. */
721 		int semi_count = ei_status.rmem_end - xfer_start;
722 		memcpy_fromio(skb->data,
723 			      (void __iomem *)dev->mem_start + xfer_base,
724 			      semi_count);
725 		count -= semi_count;
726 		memcpy_fromio(skb->data + semi_count,
727 			      (void __iomem *)ei_status.rmem_start, count);
728 	} else {
729 		memcpy_fromio(skb->data,
730 			      (void __iomem *)dev->mem_start + xfer_base,
731 			      count);
732 	}
733 }
734 
sane_block_output(struct net_device * dev,int count,const unsigned char * buf,int start_page)735 static void sane_block_output(struct net_device *dev, int count,
736 			      const unsigned char *buf, int start_page)
737 {
738 	long shmem = (start_page - WD_START_PG)<<8;
739 
740 	memcpy_toio((void __iomem *)dev->mem_start + shmem, buf, count);
741 }
742 
743 /* dayna block input/output */
dayna_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)744 static void dayna_get_8390_hdr(struct net_device *dev,
745 			       struct e8390_pkt_hdr *hdr, int ring_page)
746 {
747 	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
748 
749 	dayna_memcpy_fromcard(dev, hdr, hdr_start, 4);
750 	/* Fix endianness */
751 	hdr->count = (hdr->count & 0xFF) << 8 | (hdr->count >> 8);
752 }
753 
dayna_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)754 static void dayna_block_input(struct net_device *dev, int count,
755 			      struct sk_buff *skb, int ring_offset)
756 {
757 	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
758 	unsigned long xfer_start = xfer_base+dev->mem_start;
759 
760 	/* Note the offset math is done in card memory space which is word
761 	   per long onto our space. */
762 
763 	if (xfer_start + count > ei_status.rmem_end) {
764 		/* We must wrap the input move. */
765 		int semi_count = ei_status.rmem_end - xfer_start;
766 		dayna_memcpy_fromcard(dev, skb->data, xfer_base, semi_count);
767 		count -= semi_count;
768 		dayna_memcpy_fromcard(dev, skb->data + semi_count,
769 				      ei_status.rmem_start - dev->mem_start,
770 				      count);
771 	} else {
772 		dayna_memcpy_fromcard(dev, skb->data, xfer_base, count);
773 	}
774 }
775 
dayna_block_output(struct net_device * dev,int count,const unsigned char * buf,int start_page)776 static void dayna_block_output(struct net_device *dev, int count,
777 			       const unsigned char *buf,
778 			       int start_page)
779 {
780 	long shmem = (start_page - WD_START_PG)<<8;
781 
782 	dayna_memcpy_tocard(dev, shmem, buf, count);
783 }
784 
785 /* Cabletron block I/O */
slow_sane_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)786 static void slow_sane_get_8390_hdr(struct net_device *dev,
787 				   struct e8390_pkt_hdr *hdr,
788 				   int ring_page)
789 {
790 	unsigned long hdr_start = (ring_page - WD_START_PG)<<8;
791 	word_memcpy_fromcard(hdr, dev->mem_start + hdr_start, 4);
792 	/* Register endianism - fix here rather than 8390.c */
793 	hdr->count = (hdr->count&0xFF)<<8|(hdr->count>>8);
794 }
795 
slow_sane_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)796 static void slow_sane_block_input(struct net_device *dev, int count,
797 				  struct sk_buff *skb, int ring_offset)
798 {
799 	unsigned long xfer_base = ring_offset - (WD_START_PG<<8);
800 	unsigned long xfer_start = xfer_base+dev->mem_start;
801 
802 	if (xfer_start + count > ei_status.rmem_end) {
803 		/* We must wrap the input move. */
804 		int semi_count = ei_status.rmem_end - xfer_start;
805 		word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
806 				     semi_count);
807 		count -= semi_count;
808 		word_memcpy_fromcard(skb->data + semi_count,
809 				     ei_status.rmem_start, count);
810 	} else {
811 		word_memcpy_fromcard(skb->data, dev->mem_start + xfer_base,
812 				     count);
813 	}
814 }
815 
slow_sane_block_output(struct net_device * dev,int count,const unsigned char * buf,int start_page)816 static void slow_sane_block_output(struct net_device *dev, int count,
817 				   const unsigned char *buf, int start_page)
818 {
819 	long shmem = (start_page - WD_START_PG)<<8;
820 
821 	word_memcpy_tocard(dev->mem_start + shmem, buf, count);
822 }
823 
word_memcpy_tocard(unsigned long tp,const void * fp,int count)824 static void word_memcpy_tocard(unsigned long tp, const void *fp, int count)
825 {
826 	volatile unsigned short *to = (void *)tp;
827 	const unsigned short *from = fp;
828 
829 	count++;
830 	count /= 2;
831 
832 	while (count--)
833 		*to++ = *from++;
834 }
835 
word_memcpy_fromcard(void * tp,unsigned long fp,int count)836 static void word_memcpy_fromcard(void *tp, unsigned long fp, int count)
837 {
838 	unsigned short *to = tp;
839 	const volatile unsigned short *from = (const void *)fp;
840 
841 	count++;
842 	count /= 2;
843 
844 	while (count--)
845 		*to++ = *from++;
846 }
847 
848 
849