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1/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
2/*
3 Written 1992-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
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 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
13
14 This driver should work with many programmed-I/O 8390-based ethernet
15 boards. Currently it supports the NE1000, NE2000, many clones,
16 and some Cabletron products.
17
18 Changelog:
19
20 Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made
21 sanity checks and bad clone support optional.
22 Paul Gortmaker : new reset code, reset card after probe at boot.
23 Paul Gortmaker : multiple card support for module users.
24 Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c
25 Paul Gortmaker : Allow users with bad cards to avoid full probe.
26 Paul Gortmaker : PCI probe changes, more PCI cards supported.
27 rjohnson@analogic.com : Changed init order so an interrupt will only
28 occur after memory is allocated for dev->priv. Deallocated memory
29 last in cleanup_modue()
30 Richard Guenther : Added support for ISAPnP cards
31 Paul Gortmaker : Discontinued PCI support - use ne2k-pci.c instead.
32 Hayato Fujiwara : Add m32r support.
33
34*/
35
36/* Routines for the NatSemi-based designs (NE[12]000). */
37
38static const char version1[] =
39"ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
40static const char version2[] =
41"Last modified Nov 1, 2000 by Paul Gortmaker\n";
42
43
44#include <linux/module.h>
45#include <linux/kernel.h>
46#include <linux/errno.h>
47#include <linux/isapnp.h>
48#include <linux/init.h>
49#include <linux/interrupt.h>
50#include <linux/delay.h>
51#include <linux/netdevice.h>
52#include <linux/etherdevice.h>
53#include <linux/jiffies.h>
54#include <linux/platform_device.h>
55
56#include <asm/io.h>
57
58#include "8390.h"
59
60#define DRV_NAME "ne"
61
62/* Some defines that people can play with if so inclined. */
63
64/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
65#define SUPPORT_NE_BAD_CLONES
66/* 0xbad = bad sig or no reset ack */
67#define BAD 0xbad
68
69#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
70static struct platform_device *pdev_ne[MAX_NE_CARDS];
71static int io[MAX_NE_CARDS];
72static int irq[MAX_NE_CARDS];
73static int bad[MAX_NE_CARDS];
74static u32 ne_msg_enable;
75
76#ifdef MODULE
77module_param_hw_array(io, int, ioport, NULL, 0);
78module_param_hw_array(irq, int, irq, NULL, 0);
79module_param_array(bad, int, NULL, 0);
80module_param_named(msg_enable, ne_msg_enable, uint, 0444);
81MODULE_PARM_DESC(io, "I/O base address(es),required");
82MODULE_PARM_DESC(irq, "IRQ number(s)");
83MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
84MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
85MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
86MODULE_LICENSE("GPL");
87#endif /* MODULE */
88
89/* Do we perform extra sanity checks on stuff ? */
90/* #define NE_SANITY_CHECK */
91
92/* Do we implement the read before write bugfix ? */
93/* #define NE_RW_BUGFIX */
94
95/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
96/* #define PACKETBUF_MEMSIZE 0x40 */
97
98/* This is set up so that no ISA autoprobe takes place. We can't guarantee
99that the ne2k probe is the last 8390 based probe to take place (as it
100is at boot) and so the probe will get confused by any other 8390 cards.
101ISA device autoprobes on a running machine are not recommended anyway. */
102#if !defined(MODULE) && defined(CONFIG_ISA)
103/* Do we need a portlist for the ISA auto-probe ? */
104#define NEEDS_PORTLIST
105#endif
106
107/* A zero-terminated list of I/O addresses to be probed at boot. */
108#ifdef NEEDS_PORTLIST
109static unsigned int netcard_portlist[] __initdata = {
110 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
111};
112#endif
113
114static struct isapnp_device_id isapnp_clone_list[] __initdata = {
115 { ISAPNP_CARD_ID('A','X','E',0x2011),
116 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
117 (long) "NetGear EA201" },
118 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
119 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
120 (long) "NN NE2000" },
121 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
122 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
123 (long) "Generic PNP" },
124 { } /* terminate list */
125};
126
127MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
128
129#ifdef SUPPORT_NE_BAD_CLONES
130/* A list of bad clones that we none-the-less recognize. */
131static struct { const char *name8, *name16; unsigned char SAprefix[4];}
132bad_clone_list[] __initdata = {
133 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
134 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
135 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
136 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
137 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
138 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
139 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
140 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
141 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
142 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
143 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
144 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
145 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
146#ifdef CONFIG_MACH_TX49XX
147 {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}}, /* Toshiba built-in */
148#endif
149 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
150 {NULL,}
151};
152#endif
153
154/* ---- No user-serviceable parts below ---- */
155
156#define NE_BASE (dev->base_addr)
157#define NE_CMD 0x00
158#define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
159#define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
160#define NE_IO_EXTENT 0x20
161
162#define NE1SM_START_PG 0x20 /* First page of TX buffer */
163#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
164#define NESM_START_PG 0x40 /* First page of TX buffer */
165#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
166
167#if defined(CONFIG_MACH_TX49XX)
168# define DCR_VAL 0x48 /* 8-bit mode */
169#elif defined(CONFIG_ATARI) /* 8-bit mode on Atari, normal on Q40 */
170# define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
171#else
172# define DCR_VAL 0x49
173#endif
174
175static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
176static int ne_probe_isapnp(struct net_device *dev);
177
178static void ne_reset_8390(struct net_device *dev);
179static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
180 int ring_page);
181static void ne_block_input(struct net_device *dev, int count,
182 struct sk_buff *skb, int ring_offset);
183static void ne_block_output(struct net_device *dev, const int count,
184 const unsigned char *buf, const int start_page);
185
186
187/* Probe for various non-shared-memory ethercards.
188
189 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
190 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
191 the SAPROM, while other supposed NE2000 clones must be detected by their
192 SA prefix.
193
194 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
195 mode results in doubled values, which can be detected and compensated for.
196
197 The probe is also responsible for initializing the card and filling
198 in the 'dev' and 'ei_status' structures.
199
200 We use the minimum memory size for some ethercard product lines, iff we can't
201 distinguish models. You can increase the packet buffer size by setting
202 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
203 E1010 starts at 0x100 and ends at 0x2000.
204 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
205 E2010 starts at 0x100 and ends at 0x4000.
206 E2010-x starts at 0x100 and ends at 0xffff. */
207
208static int __init do_ne_probe(struct net_device *dev)
209{
210 unsigned long base_addr = dev->base_addr;
211#ifdef NEEDS_PORTLIST
212 int orig_irq = dev->irq;
213#endif
214
215 /* First check any supplied i/o locations. User knows best. <cough> */
216 if (base_addr > 0x1ff) { /* Check a single specified location. */
217 int ret = ne_probe1(dev, base_addr);
218 if (ret)
219 netdev_warn(dev, "ne.c: No NE*000 card found at "
220 "i/o = %#lx\n", base_addr);
221 return ret;
222 }
223 else if (base_addr != 0) /* Don't probe at all. */
224 return -ENXIO;
225
226 /* Then look for any installed ISAPnP clones */
227 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
228 return 0;
229
230#ifdef NEEDS_PORTLIST
231 /* Last resort. The semi-risky ISA auto-probe. */
232 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
233 int ioaddr = netcard_portlist[base_addr];
234 dev->irq = orig_irq;
235 if (ne_probe1(dev, ioaddr) == 0)
236 return 0;
237 }
238#endif
239
240 return -ENODEV;
241}
242
243static int __init ne_probe_isapnp(struct net_device *dev)
244{
245 int i;
246
247 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
248 struct pnp_dev *idev = NULL;
249
250 while ((idev = pnp_find_dev(NULL,
251 isapnp_clone_list[i].vendor,
252 isapnp_clone_list[i].function,
253 idev))) {
254 /* Avoid already found cards from previous calls */
255 if (pnp_device_attach(idev) < 0)
256 continue;
257 if (pnp_activate_dev(idev) < 0) {
258 pnp_device_detach(idev);
259 continue;
260 }
261 /* if no io and irq, search for next */
262 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
263 pnp_device_detach(idev);
264 continue;
265 }
266 /* found it */
267 dev->base_addr = pnp_port_start(idev, 0);
268 dev->irq = pnp_irq(idev, 0);
269 netdev_info(dev,
270 "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
271 (char *) isapnp_clone_list[i].driver_data,
272 dev->base_addr, dev->irq);
273 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
274 netdev_err(dev,
275 "ne.c: Probe of ISAPnP card at %#lx failed.\n",
276 dev->base_addr);
277 pnp_device_detach(idev);
278 return -ENXIO;
279 }
280 ei_status.priv = (unsigned long)idev;
281 break;
282 }
283 if (!idev)
284 continue;
285 return 0;
286 }
287
288 return -ENODEV;
289}
290
291static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
292{
293 int i;
294 unsigned char SA_prom[32];
295 int wordlength = 2;
296 const char *name = NULL;
297 int start_page, stop_page;
298 int neX000, ctron, copam, bad_card;
299 int reg0, ret;
300 static unsigned version_printed;
301 struct ei_device *ei_local = netdev_priv(dev);
302
303 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
304 return -EBUSY;
305
306 reg0 = inb_p(ioaddr);
307 if (reg0 == 0xFF) {
308 ret = -ENODEV;
309 goto err_out;
310 }
311
312 /* Do a preliminary verification that we have a 8390. */
313 {
314 int regd;
315 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
316 regd = inb_p(ioaddr + 0x0d);
317 outb_p(0xff, ioaddr + 0x0d);
318 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
319 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
320 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
321 outb_p(reg0, ioaddr);
322 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
323 ret = -ENODEV;
324 goto err_out;
325 }
326 }
327
328 if ((ne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
329 netdev_info(dev, "%s%s", version1, version2);
330
331 netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
332
333 /* A user with a poor card that fails to ack the reset, or that
334 does not have a valid 0x57,0x57 signature can still use this
335 without having to recompile. Specifying an i/o address along
336 with an otherwise unused dev->mem_end value of "0xBAD" will
337 cause the driver to skip these parts of the probe. */
338
339 bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
340
341 /* Reset card. Who knows what dain-bramaged state it was left in. */
342
343 {
344 unsigned long reset_start_time = jiffies;
345
346 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
347 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
348
349 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
350 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
351 if (bad_card) {
352 pr_cont(" (warning: no reset ack)");
353 break;
354 } else {
355 pr_cont(" not found (no reset ack).\n");
356 ret = -ENODEV;
357 goto err_out;
358 }
359 }
360
361 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
362 }
363
364 /* Read the 16 bytes of station address PROM.
365 We must first initialize registers, similar to NS8390p_init(eifdev, 0).
366 We can't reliably read the SAPROM address without this.
367 (I learned the hard way!). */
368 {
369 struct {unsigned char value, offset; } program_seq[] =
370 {
371 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
372 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
373 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
374 {0x00, EN0_RCNTHI},
375 {0x00, EN0_IMR}, /* Mask completion irq. */
376 {0xFF, EN0_ISR},
377 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
378 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
379 {32, EN0_RCNTLO},
380 {0x00, EN0_RCNTHI},
381 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
382 {0x00, EN0_RSARHI},
383 {E8390_RREAD+E8390_START, E8390_CMD},
384 };
385
386 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
387 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
388
389 }
390 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
391 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
392 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
393 if (SA_prom[i] != SA_prom[i+1])
394 wordlength = 1;
395 }
396
397 if (wordlength == 2)
398 {
399 for (i = 0; i < 16; i++)
400 SA_prom[i] = SA_prom[i+i];
401 /* We must set the 8390 for word mode. */
402 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
403 start_page = NESM_START_PG;
404
405 /*
406 * Realtek RTL8019AS datasheet says that the PSTOP register
407 * shouldn't exceed 0x60 in 8-bit mode.
408 * This chip can be identified by reading the signature from
409 * the remote byte count registers (otherwise write-only)...
410 */
411 if ((DCR_VAL & 0x01) == 0 && /* 8-bit mode */
412 inb(ioaddr + EN0_RCNTLO) == 0x50 &&
413 inb(ioaddr + EN0_RCNTHI) == 0x70)
414 stop_page = 0x60;
415 else
416 stop_page = NESM_STOP_PG;
417 } else {
418 start_page = NE1SM_START_PG;
419 stop_page = NE1SM_STOP_PG;
420 }
421
422 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
423 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
424 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
425
426 /* Set up the rest of the parameters. */
427 if (neX000 || bad_card || copam) {
428 name = (wordlength == 2) ? "NE2000" : "NE1000";
429 }
430 else if (ctron)
431 {
432 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
433 start_page = 0x01;
434 stop_page = (wordlength == 2) ? 0x40 : 0x20;
435 }
436 else
437 {
438#ifdef SUPPORT_NE_BAD_CLONES
439 /* Ack! Well, there might be a *bad* NE*000 clone there.
440 Check for total bogus addresses. */
441 for (i = 0; bad_clone_list[i].name8; i++)
442 {
443 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
444 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
445 SA_prom[2] == bad_clone_list[i].SAprefix[2])
446 {
447 if (wordlength == 2)
448 {
449 name = bad_clone_list[i].name16;
450 } else {
451 name = bad_clone_list[i].name8;
452 }
453 break;
454 }
455 }
456 if (bad_clone_list[i].name8 == NULL)
457 {
458 pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
459 SA_prom[14], SA_prom[15]);
460 ret = -ENXIO;
461 goto err_out;
462 }
463#else
464 pr_cont(" not found.\n");
465 ret = -ENXIO;
466 goto err_out;
467#endif
468 }
469
470 if (dev->irq < 2)
471 {
472 unsigned long cookie = probe_irq_on();
473 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
474 outb_p(0x00, ioaddr + EN0_RCNTLO);
475 outb_p(0x00, ioaddr + EN0_RCNTHI);
476 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
477 mdelay(10); /* wait 10ms for interrupt to propagate */
478 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
479 dev->irq = probe_irq_off(cookie);
480 if (ne_msg_enable & NETIF_MSG_PROBE)
481 pr_cont(" autoirq is %d", dev->irq);
482 } else if (dev->irq == 2)
483 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
484 or don't know which one to set. */
485 dev->irq = 9;
486
487 if (! dev->irq) {
488 pr_cont(" failed to detect IRQ line.\n");
489 ret = -EAGAIN;
490 goto err_out;
491 }
492
493 /* Snarf the interrupt now. There's no point in waiting since we cannot
494 share and the board will usually be enabled. */
495 ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
496 if (ret) {
497 pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
498 goto err_out;
499 }
500
501 dev->base_addr = ioaddr;
502
503 for (i = 0; i < ETH_ALEN; i++) {
504 dev->dev_addr[i] = SA_prom[i];
505 }
506
507 pr_cont("%pM\n", dev->dev_addr);
508
509 ei_status.name = name;
510 ei_status.tx_start_page = start_page;
511 ei_status.stop_page = stop_page;
512
513 /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
514 ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
515
516 ei_status.rx_start_page = start_page + TX_PAGES;
517#ifdef PACKETBUF_MEMSIZE
518 /* Allow the packet buffer size to be overridden by know-it-alls. */
519 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
520#endif
521
522 ei_status.reset_8390 = &ne_reset_8390;
523 ei_status.block_input = &ne_block_input;
524 ei_status.block_output = &ne_block_output;
525 ei_status.get_8390_hdr = &ne_get_8390_hdr;
526 ei_status.priv = 0;
527
528 dev->netdev_ops = &eip_netdev_ops;
529 NS8390p_init(dev, 0);
530
531 ei_local->msg_enable = ne_msg_enable;
532 ret = register_netdev(dev);
533 if (ret)
534 goto out_irq;
535 netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
536 name, ioaddr, dev->irq);
537 return 0;
538
539out_irq:
540 free_irq(dev->irq, dev);
541err_out:
542 release_region(ioaddr, NE_IO_EXTENT);
543 return ret;
544}
545
546/* Hard reset the card. This used to pause for the same period that a
547 8390 reset command required, but that shouldn't be necessary. */
548
549static void ne_reset_8390(struct net_device *dev)
550{
551 unsigned long reset_start_time = jiffies;
552 struct ei_device *ei_local = netdev_priv(dev);
553
554 netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
555
556 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
557 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
558
559 ei_status.txing = 0;
560 ei_status.dmaing = 0;
561
562 /* This check _should_not_ be necessary, omit eventually. */
563 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
564 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
565 netdev_err(dev, "ne_reset_8390() did not complete.\n");
566 break;
567 }
568 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
569}
570
571/* Grab the 8390 specific header. Similar to the block_input routine, but
572 we don't need to be concerned with ring wrap as the header will be at
573 the start of a page, so we optimize accordingly. */
574
575static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
576{
577 int nic_base = dev->base_addr;
578
579 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
580
581 if (ei_status.dmaing)
582 {
583 netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
584 "[DMAstat:%d][irqlock:%d].\n",
585 ei_status.dmaing, ei_status.irqlock);
586 return;
587 }
588
589 ei_status.dmaing |= 0x01;
590 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
591 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
592 outb_p(0, nic_base + EN0_RCNTHI);
593 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
594 outb_p(ring_page, nic_base + EN0_RSARHI);
595 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
596
597 if (ei_status.word16)
598 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
599 else
600 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
601
602 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
603 ei_status.dmaing &= ~0x01;
604
605 le16_to_cpus(&hdr->count);
606}
607
608/* Block input and output, similar to the Crynwr packet driver. If you
609 are porting to a new ethercard, look at the packet driver source for hints.
610 The NEx000 doesn't share the on-board packet memory -- you have to put
611 the packet out through the "remote DMA" dataport using outb. */
612
613static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
614{
615#ifdef NE_SANITY_CHECK
616 int xfer_count = count;
617 struct ei_device *ei_local = netdev_priv(dev);
618#endif
619 int nic_base = dev->base_addr;
620 char *buf = skb->data;
621
622 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
623 if (ei_status.dmaing)
624 {
625 netdev_err(dev, "DMAing conflict in ne_block_input "
626 "[DMAstat:%d][irqlock:%d].\n",
627 ei_status.dmaing, ei_status.irqlock);
628 return;
629 }
630 ei_status.dmaing |= 0x01;
631 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
632 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
633 outb_p(count >> 8, nic_base + EN0_RCNTHI);
634 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
635 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
636 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
637 if (ei_status.word16)
638 {
639 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
640 if (count & 0x01)
641 {
642 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
643#ifdef NE_SANITY_CHECK
644 xfer_count++;
645#endif
646 }
647 } else {
648 insb(NE_BASE + NE_DATAPORT, buf, count);
649 }
650
651#ifdef NE_SANITY_CHECK
652 /* This was for the ALPHA version only, but enough people have
653 been encountering problems so it is still here. If you see
654 this message you either 1) have a slightly incompatible clone
655 or 2) have noise/speed problems with your bus. */
656
657 if (netif_msg_rx_status(ei_local))
658 {
659 /* DMA termination address check... */
660 int addr, tries = 20;
661 do {
662 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
663 -- it's broken for Rx on some cards! */
664 int high = inb_p(nic_base + EN0_RSARHI);
665 int low = inb_p(nic_base + EN0_RSARLO);
666 addr = (high << 8) + low;
667 if (((ring_offset + xfer_count) & 0xff) == low)
668 break;
669 } while (--tries > 0);
670 if (tries <= 0)
671 netdev_warn(dev, "RX transfer address mismatch,"
672 "%#4.4x (expected) vs. %#4.4x (actual).\n",
673 ring_offset + xfer_count, addr);
674 }
675#endif
676 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
677 ei_status.dmaing &= ~0x01;
678}
679
680static void ne_block_output(struct net_device *dev, int count,
681 const unsigned char *buf, const int start_page)
682{
683 int nic_base = NE_BASE;
684 unsigned long dma_start;
685#ifdef NE_SANITY_CHECK
686 int retries = 0;
687 struct ei_device *ei_local = netdev_priv(dev);
688#endif
689
690 /* Round the count up for word writes. Do we need to do this?
691 What effect will an odd byte count have on the 8390?
692 I should check someday. */
693
694 if (ei_status.word16 && (count & 0x01))
695 count++;
696
697 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
698 if (ei_status.dmaing)
699 {
700 netdev_err(dev, "DMAing conflict in ne_block_output."
701 "[DMAstat:%d][irqlock:%d]\n",
702 ei_status.dmaing, ei_status.irqlock);
703 return;
704 }
705 ei_status.dmaing |= 0x01;
706 /* We should already be in page 0, but to be safe... */
707 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
708
709#ifdef NE_SANITY_CHECK
710retry:
711#endif
712
713#ifdef NE8390_RW_BUGFIX
714 /* Handle the read-before-write bug the same way as the
715 Crynwr packet driver -- the NatSemi method doesn't work.
716 Actually this doesn't always work either, but if you have
717 problems with your NEx000 this is better than nothing! */
718
719 outb_p(0x42, nic_base + EN0_RCNTLO);
720 outb_p(0x00, nic_base + EN0_RCNTHI);
721 outb_p(0x42, nic_base + EN0_RSARLO);
722 outb_p(0x00, nic_base + EN0_RSARHI);
723 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
724 /* Make certain that the dummy read has occurred. */
725 udelay(6);
726#endif
727
728 outb_p(ENISR_RDC, nic_base + EN0_ISR);
729
730 /* Now the normal output. */
731 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
732 outb_p(count >> 8, nic_base + EN0_RCNTHI);
733 outb_p(0x00, nic_base + EN0_RSARLO);
734 outb_p(start_page, nic_base + EN0_RSARHI);
735
736 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
737 if (ei_status.word16) {
738 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
739 } else {
740 outsb(NE_BASE + NE_DATAPORT, buf, count);
741 }
742
743 dma_start = jiffies;
744
745#ifdef NE_SANITY_CHECK
746 /* This was for the ALPHA version only, but enough people have
747 been encountering problems so it is still here. */
748
749 if (netif_msg_tx_queued(ei_local))
750 {
751 /* DMA termination address check... */
752 int addr, tries = 20;
753 do {
754 int high = inb_p(nic_base + EN0_RSARHI);
755 int low = inb_p(nic_base + EN0_RSARLO);
756 addr = (high << 8) + low;
757 if ((start_page << 8) + count == addr)
758 break;
759 } while (--tries > 0);
760
761 if (tries <= 0)
762 {
763 netdev_warn(dev, "Tx packet transfer address mismatch,"
764 "%#4.4x (expected) vs. %#4.4x (actual).\n",
765 (start_page << 8) + count, addr);
766 if (retries++ == 0)
767 goto retry;
768 }
769 }
770#endif
771
772 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
773 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
774 netdev_warn(dev, "timeout waiting for Tx RDC.\n");
775 ne_reset_8390(dev);
776 NS8390p_init(dev, 1);
777 break;
778 }
779
780 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
781 ei_status.dmaing &= ~0x01;
782}
783
784static int __init ne_drv_probe(struct platform_device *pdev)
785{
786 struct net_device *dev;
787 int err, this_dev = pdev->id;
788 struct resource *res;
789
790 dev = alloc_eip_netdev();
791 if (!dev)
792 return -ENOMEM;
793
794 /* ne.c doesn't populate resources in platform_device, but
795 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
796 * with resources.
797 */
798 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
799 if (res) {
800 dev->base_addr = res->start;
801 dev->irq = platform_get_irq(pdev, 0);
802 } else {
803 if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
804 free_netdev(dev);
805 return -EINVAL;
806 }
807 dev->base_addr = io[this_dev];
808 dev->irq = irq[this_dev];
809 dev->mem_end = bad[this_dev];
810 }
811 SET_NETDEV_DEV(dev, &pdev->dev);
812 err = do_ne_probe(dev);
813 if (err) {
814 free_netdev(dev);
815 return err;
816 }
817 platform_set_drvdata(pdev, dev);
818
819 /* Update with any values found by probing, don't update if
820 * resources were specified.
821 */
822 if (!res) {
823 io[this_dev] = dev->base_addr;
824 irq[this_dev] = dev->irq;
825 }
826 return 0;
827}
828
829static int ne_drv_remove(struct platform_device *pdev)
830{
831 struct net_device *dev = platform_get_drvdata(pdev);
832
833 if (dev) {
834 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
835 netif_device_detach(dev);
836 unregister_netdev(dev);
837 if (idev)
838 pnp_device_detach(idev);
839 /* Careful ne_drv_remove can be called twice, once from
840 * the platform_driver.remove and again when the
841 * platform_device is being removed.
842 */
843 ei_status.priv = 0;
844 free_irq(dev->irq, dev);
845 release_region(dev->base_addr, NE_IO_EXTENT);
846 free_netdev(dev);
847 }
848 return 0;
849}
850
851/* Remove unused devices or all if true. */
852static void ne_loop_rm_unreg(int all)
853{
854 int this_dev;
855 struct platform_device *pdev;
856 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
857 pdev = pdev_ne[this_dev];
858 /* No network device == unused */
859 if (pdev && (!platform_get_drvdata(pdev) || all)) {
860 ne_drv_remove(pdev);
861 platform_device_unregister(pdev);
862 pdev_ne[this_dev] = NULL;
863 }
864 }
865}
866
867#ifdef CONFIG_PM
868static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
869{
870 struct net_device *dev = platform_get_drvdata(pdev);
871
872 if (netif_running(dev)) {
873 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
874 netif_device_detach(dev);
875 if (idev)
876 pnp_stop_dev(idev);
877 }
878 return 0;
879}
880
881static int ne_drv_resume(struct platform_device *pdev)
882{
883 struct net_device *dev = platform_get_drvdata(pdev);
884
885 if (netif_running(dev)) {
886 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
887 if (idev)
888 pnp_start_dev(idev);
889 ne_reset_8390(dev);
890 NS8390p_init(dev, 1);
891 netif_device_attach(dev);
892 }
893 return 0;
894}
895#else
896#define ne_drv_suspend NULL
897#define ne_drv_resume NULL
898#endif
899
900static struct platform_driver ne_driver = {
901 .remove = ne_drv_remove,
902 .suspend = ne_drv_suspend,
903 .resume = ne_drv_resume,
904 .driver = {
905 .name = DRV_NAME,
906 },
907};
908
909static void __init ne_add_devices(void)
910{
911 int this_dev;
912 struct platform_device *pdev;
913
914 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
915 if (pdev_ne[this_dev])
916 continue;
917 pdev = platform_device_register_simple(
918 DRV_NAME, this_dev, NULL, 0);
919 if (IS_ERR(pdev))
920 continue;
921 pdev_ne[this_dev] = pdev;
922 }
923}
924
925#ifdef MODULE
926int __init init_module(void)
927{
928 int retval;
929 ne_add_devices();
930 retval = platform_driver_probe(&ne_driver, ne_drv_probe);
931 if (retval) {
932 if (io[0] == 0)
933 pr_notice("ne.c: You must supply \"io=0xNNN\""
934 " value(s) for ISA cards.\n");
935 ne_loop_rm_unreg(1);
936 return retval;
937 }
938
939 /* Unregister unused platform_devices. */
940 ne_loop_rm_unreg(0);
941 return retval;
942}
943#else /* MODULE */
944static int __init ne_init(void)
945{
946 int retval = platform_driver_probe(&ne_driver, ne_drv_probe);
947
948 /* Unregister unused platform_devices. */
949 ne_loop_rm_unreg(0);
950 return retval;
951}
952module_init(ne_init);
953
954struct net_device * __init ne_probe(int unit)
955{
956 int this_dev;
957 struct net_device *dev;
958
959 /* Find an empty slot, that is no net_device and zero io port. */
960 this_dev = 0;
961 while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
962 io[this_dev]) {
963 if (++this_dev == MAX_NE_CARDS)
964 return ERR_PTR(-ENOMEM);
965 }
966
967 /* Get irq, io from kernel command line */
968 dev = alloc_eip_netdev();
969 if (!dev)
970 return ERR_PTR(-ENOMEM);
971
972 sprintf(dev->name, "eth%d", unit);
973 netdev_boot_setup_check(dev);
974
975 io[this_dev] = dev->base_addr;
976 irq[this_dev] = dev->irq;
977 bad[this_dev] = dev->mem_end;
978
979 free_netdev(dev);
980
981 ne_add_devices();
982
983 /* return the first device found */
984 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
985 if (pdev_ne[this_dev]) {
986 dev = platform_get_drvdata(pdev_ne[this_dev]);
987 if (dev)
988 return dev;
989 }
990 }
991
992 return ERR_PTR(-ENODEV);
993}
994#endif /* MODULE */
995
996static void __exit ne_exit(void)
997{
998 platform_driver_unregister(&ne_driver);
999 ne_loop_rm_unreg(1);
1000}
1001module_exit(ne_exit);