1 // SPDX-License-Identifier: GPL-1.0+
2 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
3 /*
4 Written 1992-94 by Donald Becker.
5
6 Copyright 1993 United States Government as represented by the
7 Director, National Security Agency.
8
9 The author may be reached as becker@scyld.com, or C/O
10 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
11
12 This driver should work with many programmed-I/O 8390-based ethernet
13 boards. Currently it supports the NE1000, NE2000, many clones,
14 and some Cabletron products.
15
16 Changelog:
17
18 Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made
19 sanity checks and bad clone support optional.
20 Paul Gortmaker : new reset code, reset card after probe at boot.
21 Paul Gortmaker : multiple card support for module users.
22 Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c
23 Paul Gortmaker : Allow users with bad cards to avoid full probe.
24 Paul Gortmaker : PCI probe changes, more PCI cards supported.
25 rjohnson@analogic.com : Changed init order so an interrupt will only
26 occur after memory is allocated for dev->priv. Deallocated memory
27 last in cleanup_modue()
28 Richard Guenther : Added support for ISAPnP cards
29 Paul Gortmaker : Discontinued PCI support - use ne2k-pci.c instead.
30 Hayato Fujiwara : Add m32r support.
31
32 */
33
34 /* Routines for the NatSemi-based designs (NE[12]000). */
35
36 static const char version1[] =
37 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
38 static const char version2[] =
39 "Last modified Nov 1, 2000 by Paul Gortmaker\n";
40
41
42 #include <linux/module.h>
43 #include <linux/kernel.h>
44 #include <linux/errno.h>
45 #include <linux/isapnp.h>
46 #include <linux/init.h>
47 #include <linux/interrupt.h>
48 #include <linux/delay.h>
49 #include <linux/netdevice.h>
50 #include <linux/etherdevice.h>
51 #include <linux/jiffies.h>
52 #include <linux/platform_device.h>
53 #include <net/Space.h>
54
55 #include <asm/io.h>
56
57 #include "8390.h"
58
59 #define DRV_NAME "ne"
60
61 /* Some defines that people can play with if so inclined. */
62
63 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
64 #define SUPPORT_NE_BAD_CLONES
65 /* 0xbad = bad sig or no reset ack */
66 #define BAD 0xbad
67
68 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
69 static struct platform_device *pdev_ne[MAX_NE_CARDS];
70 static int io[MAX_NE_CARDS];
71 static int irq[MAX_NE_CARDS];
72 static int bad[MAX_NE_CARDS];
73 static u32 ne_msg_enable;
74
75 #ifdef MODULE
76 module_param_hw_array(io, int, ioport, NULL, 0);
77 module_param_hw_array(irq, int, irq, NULL, 0);
78 module_param_array(bad, int, NULL, 0);
79 module_param_named(msg_enable, ne_msg_enable, uint, 0444);
80 MODULE_PARM_DESC(io, "I/O base address(es),required");
81 MODULE_PARM_DESC(irq, "IRQ number(s)");
82 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
83 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
84 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
85 MODULE_LICENSE("GPL");
86 #endif /* MODULE */
87
88 /* Do we perform extra sanity checks on stuff ? */
89 /* #define NE_SANITY_CHECK */
90
91 /* Do we implement the read before write bugfix ? */
92 /* #define NE_RW_BUGFIX */
93
94 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
95 /* #define PACKETBUF_MEMSIZE 0x40 */
96
97 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
98 that the ne2k probe is the last 8390 based probe to take place (as it
99 is at boot) and so the probe will get confused by any other 8390 cards.
100 ISA device autoprobes on a running machine are not recommended anyway. */
101 #if !defined(MODULE) && defined(CONFIG_ISA)
102 /* Do we need a portlist for the ISA auto-probe ? */
103 #define NEEDS_PORTLIST
104 #endif
105
106 /* A zero-terminated list of I/O addresses to be probed at boot. */
107 #ifdef NEEDS_PORTLIST
108 static unsigned int netcard_portlist[] __initdata = {
109 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
110 };
111 #endif
112
113 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
114 { ISAPNP_CARD_ID('A','X','E',0x2011),
115 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
116 (long) "NetGear EA201" },
117 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
118 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
119 (long) "NN NE2000" },
120 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
121 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
122 (long) "Generic PNP" },
123 { } /* terminate list */
124 };
125
126 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
127
128 #ifdef SUPPORT_NE_BAD_CLONES
129 /* A list of bad clones that we none-the-less recognize. */
130 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
131 bad_clone_list[] __initdata = {
132 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
133 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
134 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
135 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
136 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
137 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
138 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
139 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
140 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
141 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
142 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
143 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
144 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
145 #ifdef CONFIG_MACH_TX49XX
146 {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}}, /* Toshiba built-in */
147 #endif
148 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
149 {NULL,}
150 };
151 #endif
152
153 /* ---- No user-serviceable parts below ---- */
154
155 #define NE_BASE (dev->base_addr)
156 #define NE_CMD 0x00
157 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
158 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
159 #define NE_IO_EXTENT 0x20
160
161 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
162 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
163 #define NESM_START_PG 0x40 /* First page of TX buffer */
164 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
165
166 #if defined(CONFIG_MACH_TX49XX)
167 # define DCR_VAL 0x48 /* 8-bit mode */
168 #elif defined(CONFIG_ATARI) /* 8-bit mode on Atari, normal on Q40 */
169 # define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
170 #else
171 # define DCR_VAL 0x49
172 #endif
173
174 static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
175 static int ne_probe_isapnp(struct net_device *dev);
176
177 static void ne_reset_8390(struct net_device *dev);
178 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
179 int ring_page);
180 static void ne_block_input(struct net_device *dev, int count,
181 struct sk_buff *skb, int ring_offset);
182 static void ne_block_output(struct net_device *dev, const int count,
183 const unsigned char *buf, const int start_page);
184
185
186 /* Probe for various non-shared-memory ethercards.
187
188 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
189 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
190 the SAPROM, while other supposed NE2000 clones must be detected by their
191 SA prefix.
192
193 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
194 mode results in doubled values, which can be detected and compensated for.
195
196 The probe is also responsible for initializing the card and filling
197 in the 'dev' and 'ei_status' structures.
198
199 We use the minimum memory size for some ethercard product lines, iff we can't
200 distinguish models. You can increase the packet buffer size by setting
201 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
202 E1010 starts at 0x100 and ends at 0x2000.
203 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
204 E2010 starts at 0x100 and ends at 0x4000.
205 E2010-x starts at 0x100 and ends at 0xffff. */
206
do_ne_probe(struct net_device * dev)207 static int __init do_ne_probe(struct net_device *dev)
208 {
209 unsigned long base_addr = dev->base_addr;
210 #ifdef NEEDS_PORTLIST
211 int orig_irq = dev->irq;
212 #endif
213
214 /* First check any supplied i/o locations. User knows best. <cough> */
215 if (base_addr > 0x1ff) { /* Check a single specified location. */
216 int ret = ne_probe1(dev, base_addr);
217 if (ret)
218 netdev_warn(dev, "ne.c: No NE*000 card found at "
219 "i/o = %#lx\n", base_addr);
220 return ret;
221 }
222 else if (base_addr != 0) /* Don't probe at all. */
223 return -ENXIO;
224
225 /* Then look for any installed ISAPnP clones */
226 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
227 return 0;
228
229 #ifdef NEEDS_PORTLIST
230 /* Last resort. The semi-risky ISA auto-probe. */
231 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
232 int ioaddr = netcard_portlist[base_addr];
233 dev->irq = orig_irq;
234 if (ne_probe1(dev, ioaddr) == 0)
235 return 0;
236 }
237 #endif
238
239 return -ENODEV;
240 }
241
ne_probe_isapnp(struct net_device * dev)242 static int __init ne_probe_isapnp(struct net_device *dev)
243 {
244 int i;
245
246 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
247 struct pnp_dev *idev = NULL;
248
249 while ((idev = pnp_find_dev(NULL,
250 isapnp_clone_list[i].vendor,
251 isapnp_clone_list[i].function,
252 idev))) {
253 /* Avoid already found cards from previous calls */
254 if (pnp_device_attach(idev) < 0)
255 continue;
256 if (pnp_activate_dev(idev) < 0) {
257 pnp_device_detach(idev);
258 continue;
259 }
260 /* if no io and irq, search for next */
261 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
262 pnp_device_detach(idev);
263 continue;
264 }
265 /* found it */
266 dev->base_addr = pnp_port_start(idev, 0);
267 dev->irq = pnp_irq(idev, 0);
268 netdev_info(dev,
269 "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
270 (char *) isapnp_clone_list[i].driver_data,
271 dev->base_addr, dev->irq);
272 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
273 netdev_err(dev,
274 "ne.c: Probe of ISAPnP card at %#lx failed.\n",
275 dev->base_addr);
276 pnp_device_detach(idev);
277 return -ENXIO;
278 }
279 ei_status.priv = (unsigned long)idev;
280 break;
281 }
282 if (!idev)
283 continue;
284 return 0;
285 }
286
287 return -ENODEV;
288 }
289
ne_probe1(struct net_device * dev,unsigned long ioaddr)290 static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
291 {
292 int i;
293 unsigned char SA_prom[32];
294 int wordlength = 2;
295 const char *name = NULL;
296 int start_page, stop_page;
297 int neX000, ctron, copam, bad_card;
298 int reg0, ret;
299 static unsigned version_printed;
300 struct ei_device *ei_local = netdev_priv(dev);
301
302 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
303 return -EBUSY;
304
305 reg0 = inb_p(ioaddr);
306 if (reg0 == 0xFF) {
307 ret = -ENODEV;
308 goto err_out;
309 }
310
311 /* Do a preliminary verification that we have a 8390. */
312 {
313 int regd;
314 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
315 regd = inb_p(ioaddr + 0x0d);
316 outb_p(0xff, ioaddr + 0x0d);
317 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
318 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
319 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
320 outb_p(reg0, ioaddr);
321 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
322 ret = -ENODEV;
323 goto err_out;
324 }
325 }
326
327 if ((ne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
328 netdev_info(dev, "%s%s", version1, version2);
329
330 netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
331
332 /* A user with a poor card that fails to ack the reset, or that
333 does not have a valid 0x57,0x57 signature can still use this
334 without having to recompile. Specifying an i/o address along
335 with an otherwise unused dev->mem_end value of "0xBAD" will
336 cause the driver to skip these parts of the probe. */
337
338 bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
339
340 /* Reset card. Who knows what dain-bramaged state it was left in. */
341
342 {
343 unsigned long reset_start_time = jiffies;
344
345 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
346 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
347
348 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
349 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
350 if (bad_card) {
351 pr_cont(" (warning: no reset ack)");
352 break;
353 } else {
354 pr_cont(" not found (no reset ack).\n");
355 ret = -ENODEV;
356 goto err_out;
357 }
358 }
359
360 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
361 }
362
363 /* Read the 16 bytes of station address PROM.
364 We must first initialize registers, similar to NS8390p_init(eifdev, 0).
365 We can't reliably read the SAPROM address without this.
366 (I learned the hard way!). */
367 {
368 struct {unsigned char value, offset; } program_seq[] =
369 {
370 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
371 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
372 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
373 {0x00, EN0_RCNTHI},
374 {0x00, EN0_IMR}, /* Mask completion irq. */
375 {0xFF, EN0_ISR},
376 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
377 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
378 {32, EN0_RCNTLO},
379 {0x00, EN0_RCNTHI},
380 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
381 {0x00, EN0_RSARHI},
382 {E8390_RREAD+E8390_START, E8390_CMD},
383 };
384
385 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
386 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
387
388 }
389 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
390 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
391 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
392 if (SA_prom[i] != SA_prom[i+1])
393 wordlength = 1;
394 }
395
396 if (wordlength == 2)
397 {
398 for (i = 0; i < 16; i++)
399 SA_prom[i] = SA_prom[i+i];
400 /* We must set the 8390 for word mode. */
401 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
402 start_page = NESM_START_PG;
403
404 /*
405 * Realtek RTL8019AS datasheet says that the PSTOP register
406 * shouldn't exceed 0x60 in 8-bit mode.
407 * This chip can be identified by reading the signature from
408 * the remote byte count registers (otherwise write-only)...
409 */
410 if ((DCR_VAL & 0x01) == 0 && /* 8-bit mode */
411 inb(ioaddr + EN0_RCNTLO) == 0x50 &&
412 inb(ioaddr + EN0_RCNTHI) == 0x70)
413 stop_page = 0x60;
414 else
415 stop_page = NESM_STOP_PG;
416 } else {
417 start_page = NE1SM_START_PG;
418 stop_page = NE1SM_STOP_PG;
419 }
420
421 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
422 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
423 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
424
425 /* Set up the rest of the parameters. */
426 if (neX000 || bad_card || copam) {
427 name = (wordlength == 2) ? "NE2000" : "NE1000";
428 }
429 else if (ctron)
430 {
431 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
432 start_page = 0x01;
433 stop_page = (wordlength == 2) ? 0x40 : 0x20;
434 }
435 else
436 {
437 #ifdef SUPPORT_NE_BAD_CLONES
438 /* Ack! Well, there might be a *bad* NE*000 clone there.
439 Check for total bogus addresses. */
440 for (i = 0; bad_clone_list[i].name8; i++)
441 {
442 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
443 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
444 SA_prom[2] == bad_clone_list[i].SAprefix[2])
445 {
446 if (wordlength == 2)
447 {
448 name = bad_clone_list[i].name16;
449 } else {
450 name = bad_clone_list[i].name8;
451 }
452 break;
453 }
454 }
455 if (bad_clone_list[i].name8 == NULL)
456 {
457 pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
458 SA_prom[14], SA_prom[15]);
459 ret = -ENXIO;
460 goto err_out;
461 }
462 #else
463 pr_cont(" not found.\n");
464 ret = -ENXIO;
465 goto err_out;
466 #endif
467 }
468
469 if (dev->irq < 2)
470 {
471 unsigned long cookie = probe_irq_on();
472 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
473 outb_p(0x00, ioaddr + EN0_RCNTLO);
474 outb_p(0x00, ioaddr + EN0_RCNTHI);
475 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
476 mdelay(10); /* wait 10ms for interrupt to propagate */
477 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
478 dev->irq = probe_irq_off(cookie);
479 if (ne_msg_enable & NETIF_MSG_PROBE)
480 pr_cont(" autoirq is %d", dev->irq);
481 } else if (dev->irq == 2)
482 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
483 or don't know which one to set. */
484 dev->irq = 9;
485
486 if (! dev->irq) {
487 pr_cont(" failed to detect IRQ line.\n");
488 ret = -EAGAIN;
489 goto err_out;
490 }
491
492 /* Snarf the interrupt now. There's no point in waiting since we cannot
493 share and the board will usually be enabled. */
494 ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
495 if (ret) {
496 pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
497 goto err_out;
498 }
499
500 dev->base_addr = ioaddr;
501
502 eth_hw_addr_set(dev, SA_prom);
503
504 pr_cont("%pM\n", dev->dev_addr);
505
506 ei_status.name = name;
507 ei_status.tx_start_page = start_page;
508 ei_status.stop_page = stop_page;
509
510 /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
511 ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
512
513 ei_status.rx_start_page = start_page + TX_PAGES;
514 #ifdef PACKETBUF_MEMSIZE
515 /* Allow the packet buffer size to be overridden by know-it-alls. */
516 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
517 #endif
518
519 ei_status.reset_8390 = &ne_reset_8390;
520 ei_status.block_input = &ne_block_input;
521 ei_status.block_output = &ne_block_output;
522 ei_status.get_8390_hdr = &ne_get_8390_hdr;
523 ei_status.priv = 0;
524
525 dev->netdev_ops = &eip_netdev_ops;
526 NS8390p_init(dev, 0);
527
528 ei_local->msg_enable = ne_msg_enable;
529 ret = register_netdev(dev);
530 if (ret)
531 goto out_irq;
532 netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
533 name, ioaddr, dev->irq);
534 return 0;
535
536 out_irq:
537 free_irq(dev->irq, dev);
538 err_out:
539 release_region(ioaddr, NE_IO_EXTENT);
540 return ret;
541 }
542
543 /* Hard reset the card. This used to pause for the same period that a
544 8390 reset command required, but that shouldn't be necessary. */
545
ne_reset_8390(struct net_device * dev)546 static void ne_reset_8390(struct net_device *dev)
547 {
548 unsigned long reset_start_time = jiffies;
549 struct ei_device *ei_local = netdev_priv(dev);
550
551 netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
552
553 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
554 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
555
556 ei_status.txing = 0;
557 ei_status.dmaing = 0;
558
559 /* This check _should_not_ be necessary, omit eventually. */
560 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
561 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
562 netdev_err(dev, "ne_reset_8390() did not complete.\n");
563 break;
564 }
565 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
566 }
567
568 /* Grab the 8390 specific header. Similar to the block_input routine, but
569 we don't need to be concerned with ring wrap as the header will be at
570 the start of a page, so we optimize accordingly. */
571
ne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)572 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
573 {
574 int nic_base = dev->base_addr;
575
576 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
577
578 if (ei_status.dmaing)
579 {
580 netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
581 "[DMAstat:%d][irqlock:%d].\n",
582 ei_status.dmaing, ei_status.irqlock);
583 return;
584 }
585
586 ei_status.dmaing |= 0x01;
587 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
588 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
589 outb_p(0, nic_base + EN0_RCNTHI);
590 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
591 outb_p(ring_page, nic_base + EN0_RSARHI);
592 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
593
594 if (ei_status.word16)
595 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
596 else
597 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
598
599 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
600 ei_status.dmaing &= ~0x01;
601
602 le16_to_cpus(&hdr->count);
603 }
604
605 /* Block input and output, similar to the Crynwr packet driver. If you
606 are porting to a new ethercard, look at the packet driver source for hints.
607 The NEx000 doesn't share the on-board packet memory -- you have to put
608 the packet out through the "remote DMA" dataport using outb. */
609
ne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)610 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
611 {
612 #ifdef NE_SANITY_CHECK
613 int xfer_count = count;
614 struct ei_device *ei_local = netdev_priv(dev);
615 #endif
616 int nic_base = dev->base_addr;
617 char *buf = skb->data;
618
619 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
620 if (ei_status.dmaing)
621 {
622 netdev_err(dev, "DMAing conflict in ne_block_input "
623 "[DMAstat:%d][irqlock:%d].\n",
624 ei_status.dmaing, ei_status.irqlock);
625 return;
626 }
627 ei_status.dmaing |= 0x01;
628 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
629 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
630 outb_p(count >> 8, nic_base + EN0_RCNTHI);
631 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
632 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
633 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
634 if (ei_status.word16)
635 {
636 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
637 if (count & 0x01)
638 {
639 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
640 #ifdef NE_SANITY_CHECK
641 xfer_count++;
642 #endif
643 }
644 } else {
645 insb(NE_BASE + NE_DATAPORT, buf, count);
646 }
647
648 #ifdef NE_SANITY_CHECK
649 /* This was for the ALPHA version only, but enough people have
650 been encountering problems so it is still here. If you see
651 this message you either 1) have a slightly incompatible clone
652 or 2) have noise/speed problems with your bus. */
653
654 if (netif_msg_rx_status(ei_local))
655 {
656 /* DMA termination address check... */
657 int addr, tries = 20;
658 do {
659 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
660 -- it's broken for Rx on some cards! */
661 int high = inb_p(nic_base + EN0_RSARHI);
662 int low = inb_p(nic_base + EN0_RSARLO);
663 addr = (high << 8) + low;
664 if (((ring_offset + xfer_count) & 0xff) == low)
665 break;
666 } while (--tries > 0);
667 if (tries <= 0)
668 netdev_warn(dev, "RX transfer address mismatch,"
669 "%#4.4x (expected) vs. %#4.4x (actual).\n",
670 ring_offset + xfer_count, addr);
671 }
672 #endif
673 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
674 ei_status.dmaing &= ~0x01;
675 }
676
ne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)677 static void ne_block_output(struct net_device *dev, int count,
678 const unsigned char *buf, const int start_page)
679 {
680 int nic_base = NE_BASE;
681 unsigned long dma_start;
682 #ifdef NE_SANITY_CHECK
683 int retries = 0;
684 struct ei_device *ei_local = netdev_priv(dev);
685 #endif
686
687 /* Round the count up for word writes. Do we need to do this?
688 What effect will an odd byte count have on the 8390?
689 I should check someday. */
690
691 if (ei_status.word16 && (count & 0x01))
692 count++;
693
694 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
695 if (ei_status.dmaing)
696 {
697 netdev_err(dev, "DMAing conflict in ne_block_output."
698 "[DMAstat:%d][irqlock:%d]\n",
699 ei_status.dmaing, ei_status.irqlock);
700 return;
701 }
702 ei_status.dmaing |= 0x01;
703 /* We should already be in page 0, but to be safe... */
704 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
705
706 #ifdef NE_SANITY_CHECK
707 retry:
708 #endif
709
710 #ifdef NE_RW_BUGFIX
711 /* Handle the read-before-write bug the same way as the
712 Crynwr packet driver -- the NatSemi method doesn't work.
713 Actually this doesn't always work either, but if you have
714 problems with your NEx000 this is better than nothing! */
715
716 outb_p(0x42, nic_base + EN0_RCNTLO);
717 outb_p(0x00, nic_base + EN0_RCNTHI);
718 outb_p(0x42, nic_base + EN0_RSARLO);
719 outb_p(0x00, nic_base + EN0_RSARHI);
720 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
721 /* Make certain that the dummy read has occurred. */
722 udelay(6);
723 #endif
724
725 outb_p(ENISR_RDC, nic_base + EN0_ISR);
726
727 /* Now the normal output. */
728 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
729 outb_p(count >> 8, nic_base + EN0_RCNTHI);
730 outb_p(0x00, nic_base + EN0_RSARLO);
731 outb_p(start_page, nic_base + EN0_RSARHI);
732
733 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
734 if (ei_status.word16) {
735 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
736 } else {
737 outsb(NE_BASE + NE_DATAPORT, buf, count);
738 }
739
740 dma_start = jiffies;
741
742 #ifdef NE_SANITY_CHECK
743 /* This was for the ALPHA version only, but enough people have
744 been encountering problems so it is still here. */
745
746 if (netif_msg_tx_queued(ei_local))
747 {
748 /* DMA termination address check... */
749 int addr, tries = 20;
750 do {
751 int high = inb_p(nic_base + EN0_RSARHI);
752 int low = inb_p(nic_base + EN0_RSARLO);
753 addr = (high << 8) + low;
754 if ((start_page << 8) + count == addr)
755 break;
756 } while (--tries > 0);
757
758 if (tries <= 0)
759 {
760 netdev_warn(dev, "Tx packet transfer address mismatch,"
761 "%#4.4x (expected) vs. %#4.4x (actual).\n",
762 (start_page << 8) + count, addr);
763 if (retries++ == 0)
764 goto retry;
765 }
766 }
767 #endif
768
769 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
770 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
771 netdev_warn(dev, "timeout waiting for Tx RDC.\n");
772 ne_reset_8390(dev);
773 NS8390p_init(dev, 1);
774 break;
775 }
776
777 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
778 ei_status.dmaing &= ~0x01;
779 }
780
ne_drv_probe(struct platform_device * pdev)781 static int __init ne_drv_probe(struct platform_device *pdev)
782 {
783 struct net_device *dev;
784 int err, this_dev = pdev->id;
785 struct resource *res;
786
787 dev = alloc_eip_netdev();
788 if (!dev)
789 return -ENOMEM;
790
791 /* ne.c doesn't populate resources in platform_device, but
792 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
793 * with resources.
794 */
795 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
796 if (res) {
797 dev->base_addr = res->start;
798 dev->irq = platform_get_irq(pdev, 0);
799 } else {
800 if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
801 free_netdev(dev);
802 return -EINVAL;
803 }
804 dev->base_addr = io[this_dev];
805 dev->irq = irq[this_dev];
806 dev->mem_end = bad[this_dev];
807 }
808 SET_NETDEV_DEV(dev, &pdev->dev);
809 err = do_ne_probe(dev);
810 if (err) {
811 free_netdev(dev);
812 return err;
813 }
814 platform_set_drvdata(pdev, dev);
815
816 /* Update with any values found by probing, don't update if
817 * resources were specified.
818 */
819 if (!res) {
820 io[this_dev] = dev->base_addr;
821 irq[this_dev] = dev->irq;
822 }
823 return 0;
824 }
825
ne_drv_remove(struct platform_device * pdev)826 static void ne_drv_remove(struct platform_device *pdev)
827 {
828 struct net_device *dev = platform_get_drvdata(pdev);
829
830 if (dev) {
831 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
832 netif_device_detach(dev);
833 unregister_netdev(dev);
834 if (idev)
835 pnp_device_detach(idev);
836 /* Careful ne_drv_remove can be called twice, once from
837 * the platform_driver.remove and again when the
838 * platform_device is being removed.
839 */
840 ei_status.priv = 0;
841 free_irq(dev->irq, dev);
842 release_region(dev->base_addr, NE_IO_EXTENT);
843 free_netdev(dev);
844 }
845 }
846
847 /* Remove unused devices or all if true. */
ne_loop_rm_unreg(int all)848 static void ne_loop_rm_unreg(int all)
849 {
850 int this_dev;
851 struct platform_device *pdev;
852 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
853 pdev = pdev_ne[this_dev];
854 /* No network device == unused */
855 if (pdev && (!platform_get_drvdata(pdev) || all)) {
856 ne_drv_remove(pdev);
857 platform_device_unregister(pdev);
858 pdev_ne[this_dev] = NULL;
859 }
860 }
861 }
862
863 #ifdef CONFIG_PM
ne_drv_suspend(struct platform_device * pdev,pm_message_t state)864 static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
865 {
866 struct net_device *dev = platform_get_drvdata(pdev);
867
868 if (netif_running(dev)) {
869 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
870 netif_device_detach(dev);
871 if (idev)
872 pnp_stop_dev(idev);
873 }
874 return 0;
875 }
876
ne_drv_resume(struct platform_device * pdev)877 static int ne_drv_resume(struct platform_device *pdev)
878 {
879 struct net_device *dev = platform_get_drvdata(pdev);
880
881 if (netif_running(dev)) {
882 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
883 if (idev)
884 pnp_start_dev(idev);
885 ne_reset_8390(dev);
886 NS8390p_init(dev, 1);
887 netif_device_attach(dev);
888 }
889 return 0;
890 }
891 #else
892 #define ne_drv_suspend NULL
893 #define ne_drv_resume NULL
894 #endif
895
896 static struct platform_driver ne_driver = {
897 .remove_new = ne_drv_remove,
898 .suspend = ne_drv_suspend,
899 .resume = ne_drv_resume,
900 .driver = {
901 .name = DRV_NAME,
902 },
903 };
904
ne_add_devices(void)905 static void __init ne_add_devices(void)
906 {
907 int this_dev;
908 struct platform_device *pdev;
909
910 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
911 if (pdev_ne[this_dev])
912 continue;
913 pdev = platform_device_register_simple(
914 DRV_NAME, this_dev, NULL, 0);
915 if (IS_ERR(pdev))
916 continue;
917 pdev_ne[this_dev] = pdev;
918 }
919 }
920
ne_init(void)921 static int __init ne_init(void)
922 {
923 int retval;
924
925 if (IS_MODULE(CONFIG_NE2000))
926 ne_add_devices();
927
928 retval = platform_driver_probe(&ne_driver, ne_drv_probe);
929
930 if (IS_MODULE(CONFIG_NE2000) && retval) {
931 if (io[0] == 0)
932 pr_notice("ne.c: You must supply \"io=0xNNN\""
933 " value(s) for ISA cards.\n");
934 ne_loop_rm_unreg(1);
935 return retval;
936 }
937
938 /* Unregister unused platform_devices. */
939 ne_loop_rm_unreg(0);
940 return retval;
941 }
942 module_init(ne_init);
943
944 #if !defined(MODULE) && defined(CONFIG_NETDEV_LEGACY_INIT)
ne_probe(int unit)945 struct net_device * __init ne_probe(int unit)
946 {
947 int this_dev;
948 struct net_device *dev;
949
950 /* Find an empty slot, that is no net_device and zero io port. */
951 this_dev = 0;
952 while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
953 io[this_dev]) {
954 if (++this_dev == MAX_NE_CARDS)
955 return ERR_PTR(-ENOMEM);
956 }
957
958 /* Get irq, io from kernel command line */
959 dev = alloc_eip_netdev();
960 if (!dev)
961 return ERR_PTR(-ENOMEM);
962
963 sprintf(dev->name, "eth%d", unit);
964 netdev_boot_setup_check(dev);
965
966 io[this_dev] = dev->base_addr;
967 irq[this_dev] = dev->irq;
968 bad[this_dev] = dev->mem_end;
969
970 free_netdev(dev);
971
972 ne_add_devices();
973
974 /* return the first device found */
975 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
976 if (pdev_ne[this_dev]) {
977 dev = platform_get_drvdata(pdev_ne[this_dev]);
978 if (dev)
979 return dev;
980 }
981 }
982
983 return ERR_PTR(-ENODEV);
984 }
985 #endif
986
ne_exit(void)987 static void __exit ne_exit(void)
988 {
989 platform_driver_unregister(&ne_driver);
990 ne_loop_rm_unreg(1);
991 }
992 module_exit(ne_exit);
993