1 /* A Linux device driver for PCI NE2000 clones.
2  *
3  * Authors and other copyright holders:
4  * 1992-2000 by Donald Becker, NE2000 core and various modifications.
5  * 1995-1998 by Paul Gortmaker, core modifications and PCI support.
6  * Copyright 1993 assigned to the United States Government as represented
7  * by the Director, National Security Agency.
8  *
9  * This software may be used and distributed according to the terms of
10  * the GNU General Public License (GPL), incorporated herein by reference.
11  * Drivers based on or derived from this code fall under the GPL and must
12  * retain the authorship, copyright and license notice.  This file is not
13  * a complete program and may only be used when the entire operating
14  * system is licensed under the GPL.
15  *
16  * The author may be reached as becker@scyld.com, or C/O
17  * Scyld Computing Corporation
18  * 410 Severn Ave., Suite 210
19  * Annapolis MD 21403
20  *
21  * Issues remaining:
22  * People are making PCI NE2000 clones! Oh the horror, the horror...
23  * Limited full-duplex support.
24  */
25 
26 #define DRV_NAME	"ne2k-pci"
27 #define DRV_DESCRIPTION	"PCI NE2000 clone driver"
28 #define DRV_AUTHOR	"Donald Becker / Paul Gortmaker"
29 #define DRV_VERSION	"1.03"
30 #define DRV_RELDATE	"9/22/2003"
31 
32 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
33 
34 /* The user-configurable values.
35  * These may be modified when a driver module is loaded.
36  */
37 
38 /* More are supported, limit only on options */
39 #define MAX_UNITS 8
40 
41 /* Used to pass the full-duplex flag, etc. */
42 static int full_duplex[MAX_UNITS];
43 static int options[MAX_UNITS];
44 
45 /* Force a non std. amount of memory.  Units are 256 byte pages. */
46 /* #define PACKETBUF_MEMSIZE	0x40 */
47 
48 
49 #include <linux/module.h>
50 #include <linux/kernel.h>
51 #include <linux/errno.h>
52 #include <linux/pci.h>
53 #include <linux/init.h>
54 #include <linux/interrupt.h>
55 #include <linux/ethtool.h>
56 #include <linux/netdevice.h>
57 #include <linux/etherdevice.h>
58 
59 #include <linux/io.h>
60 #include <asm/irq.h>
61 #include <linux/uaccess.h>
62 
63 #include "8390.h"
64 
65 static int ne2k_msg_enable;
66 
67 static const int default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
68 				      NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR);
69 
70 #if defined(__powerpc__)
71 #define inl_le(addr)  le32_to_cpu(inl(addr))
72 #define inw_le(addr)  le16_to_cpu(inw(addr))
73 #endif
74 
75 MODULE_AUTHOR(DRV_AUTHOR);
76 MODULE_DESCRIPTION(DRV_DESCRIPTION);
77 MODULE_VERSION(DRV_VERSION);
78 MODULE_LICENSE("GPL");
79 
80 module_param_named(msg_enable, ne2k_msg_enable, int, 0444);
81 module_param_array(options, int, NULL, 0);
82 module_param_array(full_duplex, int, NULL, 0);
83 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
84 MODULE_PARM_DESC(options, "Bit 5: full duplex");
85 MODULE_PARM_DESC(full_duplex, "full duplex setting(s) (1)");
86 
87 /* Some defines that people can play with if so inclined.
88  */
89 
90 /* Use 32 bit data-movement operations instead of 16 bit. */
91 #define USE_LONGIO
92 
93 /* Do we implement the read before write bugfix ? */
94 /* #define NE_RW_BUGFIX */
95 
96 /* Flags.  We rename an existing ei_status field to store flags!
97  * Thus only the low 8 bits are usable for non-init-time flags.
98  */
99 #define ne2k_flags reg0
100 
101 enum {
102 	/* Chip can do only 16/32-bit xfers. */
103 	ONLY_16BIT_IO = 8, ONLY_32BIT_IO = 4,
104 	/* User override. */
105 	FORCE_FDX = 0x20,
106 	REALTEK_FDX = 0x40, HOLTEK_FDX = 0x80,
107 	STOP_PG_0x60 = 0x100,
108 };
109 
110 enum ne2k_pci_chipsets {
111 	CH_RealTek_RTL_8029 = 0,
112 	CH_Winbond_89C940,
113 	CH_Compex_RL2000,
114 	CH_KTI_ET32P2,
115 	CH_NetVin_NV5000SC,
116 	CH_Via_86C926,
117 	CH_SureCom_NE34,
118 	CH_Winbond_W89C940F,
119 	CH_Holtek_HT80232,
120 	CH_Holtek_HT80229,
121 	CH_Winbond_89C940_8c4a,
122 };
123 
124 
125 static struct {
126 	char *name;
127 	int flags;
128 } pci_clone_list[] = {
129 	{"RealTek RTL-8029(AS)", REALTEK_FDX},
130 	{"Winbond 89C940", 0},
131 	{"Compex RL2000", 0},
132 	{"KTI ET32P2", 0},
133 	{"NetVin NV5000SC", 0},
134 	{"Via 86C926", ONLY_16BIT_IO},
135 	{"SureCom NE34", 0},
136 	{"Winbond W89C940F", 0},
137 	{"Holtek HT80232", ONLY_16BIT_IO | HOLTEK_FDX},
138 	{"Holtek HT80229", ONLY_32BIT_IO | HOLTEK_FDX | STOP_PG_0x60 },
139 	{"Winbond W89C940(misprogrammed)", 0},
140 	{NULL,}
141 };
142 
143 
144 static const struct pci_device_id ne2k_pci_tbl[] = {
145 	{ 0x10ec, 0x8029, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_RealTek_RTL_8029 },
146 	{ 0x1050, 0x0940, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_89C940 },
147 	{ 0x11f6, 0x1401, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Compex_RL2000 },
148 	{ 0x8e2e, 0x3000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_KTI_ET32P2 },
149 	{ 0x4a14, 0x5000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_NetVin_NV5000SC },
150 	{ 0x1106, 0x0926, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Via_86C926 },
151 	{ 0x10bd, 0x0e34, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_SureCom_NE34 },
152 	{ 0x1050, 0x5a5a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_W89C940F },
153 	{ 0x12c3, 0x0058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Holtek_HT80232 },
154 	{ 0x12c3, 0x5598, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Holtek_HT80229 },
155 	{ 0x8c4a, 0x1980, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CH_Winbond_89C940_8c4a },
156 	{ 0, }
157 };
158 
159 MODULE_DEVICE_TABLE(pci, ne2k_pci_tbl);
160 
161 
162 /* ---- No user-serviceable parts below ---- */
163 
164 #define NE_BASE	 (dev->base_addr)
165 #define NE_CMD		0x00
166 #define NE_DATAPORT	0x10	/* NatSemi-defined port window offset. */
167 #define NE_RESET	0x1f	/* Issue a read to reset, a write to clear. */
168 #define NE_IO_EXTENT	0x20
169 
170 #define NESM_START_PG	0x40	/* First page of TX buffer */
171 #define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */
172 
173 
174 static int ne2k_pci_open(struct net_device *dev);
175 static int ne2k_pci_close(struct net_device *dev);
176 
177 static void ne2k_pci_reset_8390(struct net_device *dev);
178 static void ne2k_pci_get_8390_hdr(struct net_device *dev,
179 				  struct e8390_pkt_hdr *hdr, int ring_page);
180 static void ne2k_pci_block_input(struct net_device *dev, int count,
181 				 struct sk_buff *skb, int ring_offset);
182 static void ne2k_pci_block_output(struct net_device *dev, const int count,
183 				  const unsigned char *buf,
184 				  const int start_page);
185 static const struct ethtool_ops ne2k_pci_ethtool_ops;
186 
187 
188 
189 /* There is no room in the standard 8390 structure for extra info we need,
190  * so we build a meta/outer-wrapper structure..
191  */
192 struct ne2k_pci_card {
193 	struct net_device *dev;
194 	struct pci_dev *pci_dev;
195 };
196 
197 
198 
199 /* NEx000-clone boards have a Station Address (SA) PROM (SAPROM) in the packet
200  * buffer memory space.  By-the-spec NE2000 clones have 0x57,0x57 in bytes
201  * 0x0e,0x0f of the SAPROM, while other supposed NE2000 clones must be
202  * detected by their SA prefix.
203  *
204  * Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
205  * mode results in doubled values, which can be detected and compensated for.
206  *
207  * The probe is also responsible for initializing the card and filling
208  * in the 'dev' and 'ei_status' structures.
209  */
210 
211 static const struct net_device_ops ne2k_netdev_ops = {
212 	.ndo_open		= ne2k_pci_open,
213 	.ndo_stop		= ne2k_pci_close,
214 	.ndo_start_xmit		= ei_start_xmit,
215 	.ndo_tx_timeout		= ei_tx_timeout,
216 	.ndo_get_stats		= ei_get_stats,
217 	.ndo_set_rx_mode	= ei_set_multicast_list,
218 	.ndo_validate_addr	= eth_validate_addr,
219 	.ndo_set_mac_address	= eth_mac_addr,
220 #ifdef CONFIG_NET_POLL_CONTROLLER
221 	.ndo_poll_controller = ei_poll,
222 #endif
223 };
224 
225 static int ne2k_pci_init_one(struct pci_dev *pdev,
226 			     const struct pci_device_id *ent)
227 {
228 	struct net_device *dev;
229 	int i;
230 	unsigned char SA_prom[32];
231 	int start_page, stop_page;
232 	int irq, reg0, chip_idx = ent->driver_data;
233 	static unsigned int fnd_cnt;
234 	long ioaddr;
235 	int flags = pci_clone_list[chip_idx].flags;
236 	struct ei_device *ei_local;
237 
238 	fnd_cnt++;
239 
240 	i = pci_enable_device(pdev);
241 	if (i)
242 		return i;
243 
244 	ioaddr = pci_resource_start(pdev, 0);
245 	irq = pdev->irq;
246 
247 	if (!ioaddr || ((pci_resource_flags(pdev, 0) & IORESOURCE_IO) == 0)) {
248 		dev_err(&pdev->dev, "no I/O resource at PCI BAR #0\n");
249 		goto err_out;
250 	}
251 
252 	if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME)) {
253 		dev_err(&pdev->dev, "I/O resource 0x%x @ 0x%lx busy\n",
254 			NE_IO_EXTENT, ioaddr);
255 		goto err_out;
256 	}
257 
258 	reg0 = inb(ioaddr);
259 	if (reg0 == 0xFF)
260 		goto err_out_free_res;
261 
262 	/* Do a preliminary verification that we have a 8390. */
263 	{
264 		int regd;
265 
266 		outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD);
267 		regd = inb(ioaddr + 0x0d);
268 		outb(0xff, ioaddr + 0x0d);
269 		outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD);
270 		/* Clear the counter by reading. */
271 		inb(ioaddr + EN0_COUNTER0);
272 		if (inb(ioaddr + EN0_COUNTER0) != 0) {
273 			outb(reg0, ioaddr);
274 			/*  Restore the old values. */
275 			outb(regd, ioaddr + 0x0d);
276 			goto err_out_free_res;
277 		}
278 	}
279 
280 	/* Allocate net_device, dev->priv; fill in 8390 specific dev fields. */
281 	dev = alloc_ei_netdev();
282 	if (!dev) {
283 		dev_err(&pdev->dev, "cannot allocate ethernet device\n");
284 		goto err_out_free_res;
285 	}
286 	dev->netdev_ops = &ne2k_netdev_ops;
287 	ei_local = netdev_priv(dev);
288 	ei_local->msg_enable = netif_msg_init(ne2k_msg_enable, default_msg_level);
289 
290 	SET_NETDEV_DEV(dev, &pdev->dev);
291 
292 	/* Reset card. Who knows what dain-bramaged state it was left in. */
293 	{
294 		unsigned long reset_start_time = jiffies;
295 
296 		outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
297 
298 		/* This looks like a horrible timing loop, but it should never
299 		 * take more than a few cycles.
300 		 */
301 		while ((inb(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
302 			/* Limit wait: '2' avoids jiffy roll-over. */
303 			if (jiffies - reset_start_time > 2) {
304 				dev_err(&pdev->dev,
305 					"Card failure (no reset ack).\n");
306 				goto err_out_free_netdev;
307 			}
308 		/* Ack all intr. */
309 		outb(0xff, ioaddr + EN0_ISR);
310 	}
311 
312 	/* Read the 16 bytes of station address PROM.
313 	 * We must first initialize registers, similar
314 	 * to NS8390_init(eifdev, 0).
315 	 * We can't reliably read the SAPROM address without this.
316 	 * (I learned the hard way!).
317 	 */
318 	{
319 		struct {unsigned char value, offset; } program_seq[] = {
320 			/* Select page 0 */
321 			{E8390_NODMA + E8390_PAGE0 + E8390_STOP, E8390_CMD},
322 			/* Set word-wide access */
323 			{0x49,	EN0_DCFG},
324 			/* Clear the count regs. */
325 			{0x00,	EN0_RCNTLO},
326 			/* Mask completion IRQ */
327 			{0x00,	EN0_RCNTHI},
328 			{0x00,	EN0_IMR},
329 			{0xFF,	EN0_ISR},
330 			/* 0x20 Set to monitor */
331 			{E8390_RXOFF, EN0_RXCR},
332 			/* 0x02 and loopback mode */
333 			{E8390_TXOFF, EN0_TXCR},
334 			{32,	EN0_RCNTLO},
335 			{0x00,	EN0_RCNTHI},
336 			/* DMA starting at 0x0000 */
337 			{0x00,	EN0_RSARLO},
338 			{0x00,	EN0_RSARHI},
339 			{E8390_RREAD+E8390_START, E8390_CMD},
340 		};
341 		for (i = 0; i < ARRAY_SIZE(program_seq); i++)
342 			outb(program_seq[i].value,
343 			     ioaddr + program_seq[i].offset);
344 
345 	}
346 
347 	/* Note: all PCI cards have at least 16 bit access, so we don't have
348 	 * to check for 8 bit cards.  Most cards permit 32 bit access.
349 	 */
350 	if (flags & ONLY_32BIT_IO) {
351 		for (i = 0; i < 4 ; i++)
352 			((u32 *)SA_prom)[i] = le32_to_cpu(inl(ioaddr + NE_DATAPORT));
353 	} else
354 		for (i = 0; i < 32 /* sizeof(SA_prom )*/; i++)
355 			SA_prom[i] = inb(ioaddr + NE_DATAPORT);
356 
357 	/* We always set the 8390 registers for word mode. */
358 	outb(0x49, ioaddr + EN0_DCFG);
359 	start_page = NESM_START_PG;
360 
361 	stop_page = flags & STOP_PG_0x60 ? 0x60 : NESM_STOP_PG;
362 
363 	/* Set up the rest of the parameters. */
364 	dev->irq = irq;
365 	dev->base_addr = ioaddr;
366 	pci_set_drvdata(pdev, dev);
367 
368 	ei_status.name = pci_clone_list[chip_idx].name;
369 	ei_status.tx_start_page = start_page;
370 	ei_status.stop_page = stop_page;
371 	ei_status.word16 = 1;
372 	ei_status.ne2k_flags = flags;
373 	if (fnd_cnt < MAX_UNITS) {
374 		if (full_duplex[fnd_cnt] > 0 || (options[fnd_cnt] & FORCE_FDX))
375 			ei_status.ne2k_flags |= FORCE_FDX;
376 	}
377 
378 	ei_status.rx_start_page = start_page + TX_PAGES;
379 #ifdef PACKETBUF_MEMSIZE
380 	/* Allow the packet buffer size to be overridden by know-it-alls. */
381 	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
382 #endif
383 
384 	ei_status.reset_8390 = &ne2k_pci_reset_8390;
385 	ei_status.block_input = &ne2k_pci_block_input;
386 	ei_status.block_output = &ne2k_pci_block_output;
387 	ei_status.get_8390_hdr = &ne2k_pci_get_8390_hdr;
388 	ei_status.priv = (unsigned long) pdev;
389 
390 	dev->ethtool_ops = &ne2k_pci_ethtool_ops;
391 	NS8390_init(dev, 0);
392 
393 	memcpy(dev->dev_addr, SA_prom, dev->addr_len);
394 
395 	i = register_netdev(dev);
396 	if (i)
397 		goto err_out_free_netdev;
398 
399 	netdev_info(dev, "%s found at %#lx, IRQ %d, %pM.\n",
400 		    pci_clone_list[chip_idx].name, ioaddr, dev->irq,
401 		    dev->dev_addr);
402 
403 	return 0;
404 
405 err_out_free_netdev:
406 	free_netdev(dev);
407 err_out_free_res:
408 	release_region(ioaddr, NE_IO_EXTENT);
409 err_out:
410 	pci_disable_device(pdev);
411 	return -ENODEV;
412 }
413 
414 /* Magic incantation sequence for full duplex on the supported cards.
415  */
416 static inline int set_realtek_fdx(struct net_device *dev)
417 {
418 	long ioaddr = dev->base_addr;
419 
420 	outb(0xC0 + E8390_NODMA, ioaddr + NE_CMD); /* Page 3 */
421 	outb(0xC0, ioaddr + 0x01); /* Enable writes to CONFIG3 */
422 	outb(0x40, ioaddr + 0x06); /* Enable full duplex */
423 	outb(0x00, ioaddr + 0x01); /* Disable writes to CONFIG3 */
424 	outb(E8390_PAGE0 + E8390_NODMA, ioaddr + NE_CMD); /* Page 0 */
425 	return 0;
426 }
427 
428 static inline int set_holtek_fdx(struct net_device *dev)
429 {
430 	long ioaddr = dev->base_addr;
431 
432 	outb(inb(ioaddr + 0x20) | 0x80, ioaddr + 0x20);
433 	return 0;
434 }
435 
436 static int ne2k_pci_set_fdx(struct net_device *dev)
437 {
438 	if (ei_status.ne2k_flags & REALTEK_FDX)
439 		return set_realtek_fdx(dev);
440 	else if (ei_status.ne2k_flags & HOLTEK_FDX)
441 		return set_holtek_fdx(dev);
442 
443 	return -EOPNOTSUPP;
444 }
445 
446 static int ne2k_pci_open(struct net_device *dev)
447 {
448 	int ret = request_irq(dev->irq, ei_interrupt, IRQF_SHARED,
449 			      dev->name, dev);
450 
451 	if (ret)
452 		return ret;
453 
454 	if (ei_status.ne2k_flags & FORCE_FDX)
455 		ne2k_pci_set_fdx(dev);
456 
457 	ei_open(dev);
458 	return 0;
459 }
460 
461 static int ne2k_pci_close(struct net_device *dev)
462 {
463 	ei_close(dev);
464 	free_irq(dev->irq, dev);
465 	return 0;
466 }
467 
468 /* Hard reset the card.  This used to pause for the same period that a
469  * 8390 reset command required, but that shouldn't be necessary.
470  */
471 static void ne2k_pci_reset_8390(struct net_device *dev)
472 {
473 	unsigned long reset_start_time = jiffies;
474 	struct ei_device *ei_local = netdev_priv(dev);
475 
476 	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n",
477 		  jiffies);
478 
479 	outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
480 
481 	ei_status.txing = 0;
482 	ei_status.dmaing = 0;
483 
484 	/* This check _should_not_ be necessary, omit eventually. */
485 	while ((inb(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
486 		if (jiffies - reset_start_time > 2) {
487 			netdev_err(dev, "%s did not complete.\n", __func__);
488 			break;
489 		}
490 	/* Ack intr. */
491 	outb(ENISR_RESET, NE_BASE + EN0_ISR);
492 }
493 
494 /* Grab the 8390 specific header. Similar to the block_input routine, but
495  * we don't need to be concerned with ring wrap as the header will be at
496  * the start of a page, so we optimize accordingly.
497  */
498 
499 static void ne2k_pci_get_8390_hdr(struct net_device *dev,
500 				  struct e8390_pkt_hdr *hdr, int ring_page)
501 {
502 
503 	long nic_base = dev->base_addr;
504 
505 	/* This *shouldn't* happen. If it does, it's the last thing you'll see
506 	 */
507 	if (ei_status.dmaing) {
508 		netdev_err(dev, "DMAing conflict in %s [DMAstat:%d][irqlock:%d].\n",
509 			   __func__, ei_status.dmaing, ei_status.irqlock);
510 		return;
511 	}
512 
513 	ei_status.dmaing |= 0x01;
514 	outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
515 	outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
516 	outb(0, nic_base + EN0_RCNTHI);
517 	outb(0, nic_base + EN0_RSARLO);		/* On page boundary */
518 	outb(ring_page, nic_base + EN0_RSARHI);
519 	outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
520 
521 	if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
522 		insw(NE_BASE + NE_DATAPORT, hdr,
523 		     sizeof(struct e8390_pkt_hdr) >> 1);
524 	} else {
525 		*(u32 *)hdr = le32_to_cpu(inl(NE_BASE + NE_DATAPORT));
526 		le16_to_cpus(&hdr->count);
527 	}
528 	/* Ack intr. */
529 	outb(ENISR_RDC, nic_base + EN0_ISR);
530 	ei_status.dmaing &= ~0x01;
531 }
532 
533 /* Block input and output, similar to the Crynwr packet driver.  If you
534  *are porting to a new ethercard, look at the packet driver source for hints.
535  *The NEx000 doesn't share the on-board packet memory -- you have to put
536  *the packet out through the "remote DMA" dataport using outb.
537  */
538 
539 static void ne2k_pci_block_input(struct net_device *dev, int count,
540 				 struct sk_buff *skb, int ring_offset)
541 {
542 	long nic_base = dev->base_addr;
543 	char *buf = skb->data;
544 
545 	/* This *shouldn't* happen.
546 	 * If it does, it's the last thing you'll see.
547 	 */
548 	if (ei_status.dmaing) {
549 		netdev_err(dev, "DMAing conflict in %s [DMAstat:%d][irqlock:%d]\n",
550 			   __func__, ei_status.dmaing, ei_status.irqlock);
551 		return;
552 	}
553 	ei_status.dmaing |= 0x01;
554 	if (ei_status.ne2k_flags & ONLY_32BIT_IO)
555 		count = (count + 3) & 0xFFFC;
556 	outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
557 	outb(count & 0xff, nic_base + EN0_RCNTLO);
558 	outb(count >> 8, nic_base + EN0_RCNTHI);
559 	outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
560 	outb(ring_offset >> 8, nic_base + EN0_RSARHI);
561 	outb(E8390_RREAD + E8390_START, nic_base + NE_CMD);
562 
563 	if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
564 		insw(NE_BASE + NE_DATAPORT, buf, count >> 1);
565 		if (count & 0x01)
566 			buf[count-1] = inb(NE_BASE + NE_DATAPORT);
567 	} else {
568 		insl(NE_BASE + NE_DATAPORT, buf, count >> 2);
569 		if (count & 3) {
570 			buf += count & ~3;
571 			if (count & 2) {
572 				__le16 *b = (__le16 *)buf;
573 
574 				*b++ = cpu_to_le16(inw(NE_BASE + NE_DATAPORT));
575 				buf = (char *)b;
576 			}
577 			if (count & 1)
578 				*buf = inb(NE_BASE + NE_DATAPORT);
579 		}
580 	}
581 	/* Ack intr. */
582 	outb(ENISR_RDC, nic_base + EN0_ISR);
583 	ei_status.dmaing &= ~0x01;
584 }
585 
586 static void ne2k_pci_block_output(struct net_device *dev, int count,
587 		const unsigned char *buf, const int start_page)
588 {
589 	long nic_base = NE_BASE;
590 	unsigned long dma_start;
591 
592 	/* On little-endian it's always safe to round the count up for
593 	 * word writes.
594 	 */
595 	if (ei_status.ne2k_flags & ONLY_32BIT_IO)
596 		count = (count + 3) & 0xFFFC;
597 	else
598 		if (count & 0x01)
599 			count++;
600 
601 	/* This *shouldn't* happen.
602 	 * If it does, it's the last thing you'll see.
603 	 */
604 	if (ei_status.dmaing) {
605 		netdev_err(dev, "DMAing conflict in %s [DMAstat:%d][irqlock:%d]\n",
606 			   __func__, ei_status.dmaing, ei_status.irqlock);
607 		return;
608 	}
609 	ei_status.dmaing |= 0x01;
610 	/* We should already be in page 0, but to be safe... */
611 	outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
612 
613 #ifdef NE_RW_BUGFIX
614 	/* Handle the read-before-write bug the same way as the
615 	 * Crynwr packet driver -- the NatSemi method doesn't work.
616 	 * Actually this doesn't always work either, but if you have
617 	 * problems with your NEx000 this is better than nothing!
618 	 */
619 	outb(0x42, nic_base + EN0_RCNTLO);
620 	outb(0x00, nic_base + EN0_RCNTHI);
621 	outb(0x42, nic_base + EN0_RSARLO);
622 	outb(0x00, nic_base + EN0_RSARHI);
623 	outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
624 #endif
625 	outb(ENISR_RDC, nic_base + EN0_ISR);
626 
627 	/* Now the normal output. */
628 	outb(count & 0xff, nic_base + EN0_RCNTLO);
629 	outb(count >> 8,   nic_base + EN0_RCNTHI);
630 	outb(0x00, nic_base + EN0_RSARLO);
631 	outb(start_page, nic_base + EN0_RSARHI);
632 	outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
633 	if (ei_status.ne2k_flags & ONLY_16BIT_IO) {
634 		outsw(NE_BASE + NE_DATAPORT, buf, count >> 1);
635 	} else {
636 		outsl(NE_BASE + NE_DATAPORT, buf, count >> 2);
637 		if (count & 3) {
638 			buf += count & ~3;
639 			if (count & 2) {
640 				__le16 *b = (__le16 *)buf;
641 
642 				outw(le16_to_cpu(*b++), NE_BASE + NE_DATAPORT);
643 				buf = (char *)b;
644 			}
645 		}
646 	}
647 
648 	dma_start = jiffies;
649 
650 	while ((inb(nic_base + EN0_ISR) & ENISR_RDC) == 0)
651 		/* Avoid clock roll-over. */
652 		if (jiffies - dma_start > 2) {
653 			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
654 			ne2k_pci_reset_8390(dev);
655 			NS8390_init(dev, 1);
656 			break;
657 		}
658 	/* Ack intr. */
659 	outb(ENISR_RDC, nic_base + EN0_ISR);
660 	ei_status.dmaing &= ~0x01;
661 }
662 
663 static void ne2k_pci_get_drvinfo(struct net_device *dev,
664 				 struct ethtool_drvinfo *info)
665 {
666 	struct ei_device *ei = netdev_priv(dev);
667 	struct pci_dev *pci_dev = (struct pci_dev *) ei->priv;
668 
669 	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
670 	strscpy(info->version, DRV_VERSION, sizeof(info->version));
671 	strscpy(info->bus_info, pci_name(pci_dev), sizeof(info->bus_info));
672 }
673 
674 static u32 ne2k_pci_get_msglevel(struct net_device *dev)
675 {
676 	struct ei_device *ei_local = netdev_priv(dev);
677 
678 	return ei_local->msg_enable;
679 }
680 
681 static void ne2k_pci_set_msglevel(struct net_device *dev, u32 v)
682 {
683 	struct ei_device *ei_local = netdev_priv(dev);
684 
685 	ei_local->msg_enable = v;
686 }
687 
688 static const struct ethtool_ops ne2k_pci_ethtool_ops = {
689 	.get_drvinfo		= ne2k_pci_get_drvinfo,
690 	.get_msglevel		= ne2k_pci_get_msglevel,
691 	.set_msglevel		= ne2k_pci_set_msglevel,
692 };
693 
694 static void ne2k_pci_remove_one(struct pci_dev *pdev)
695 {
696 	struct net_device *dev = pci_get_drvdata(pdev);
697 
698 	BUG_ON(!dev);
699 	unregister_netdev(dev);
700 	release_region(dev->base_addr, NE_IO_EXTENT);
701 	free_netdev(dev);
702 	pci_disable_device(pdev);
703 }
704 
705 static int __maybe_unused ne2k_pci_suspend(struct device *dev_d)
706 {
707 	struct net_device *dev = dev_get_drvdata(dev_d);
708 
709 	netif_device_detach(dev);
710 
711 	return 0;
712 }
713 
714 static int __maybe_unused ne2k_pci_resume(struct device *dev_d)
715 {
716 	struct net_device *dev = dev_get_drvdata(dev_d);
717 
718 	NS8390_init(dev, 1);
719 	netif_device_attach(dev);
720 
721 	return 0;
722 }
723 
724 static SIMPLE_DEV_PM_OPS(ne2k_pci_pm_ops, ne2k_pci_suspend, ne2k_pci_resume);
725 
726 static struct pci_driver ne2k_driver = {
727 	.name		= DRV_NAME,
728 	.probe		= ne2k_pci_init_one,
729 	.remove		= ne2k_pci_remove_one,
730 	.id_table	= ne2k_pci_tbl,
731 	.driver.pm	= &ne2k_pci_pm_ops,
732 };
733 
734 
735 static int __init ne2k_pci_init(void)
736 {
737 	return pci_register_driver(&ne2k_driver);
738 }
739 
740 
741 static void __exit ne2k_pci_cleanup(void)
742 {
743 	pci_unregister_driver(&ne2k_driver);
744 }
745 
746 module_init(ne2k_pci_init);
747 module_exit(ne2k_pci_cleanup);
748