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
38 static const char version1[] =
39 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
40 static 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 */
70 static struct platform_device *pdev_ne[MAX_NE_CARDS];
71 static int io[MAX_NE_CARDS];
72 static int irq[MAX_NE_CARDS];
73 static int bad[MAX_NE_CARDS];
74 static u32 ne_msg_enable;
75
76 #ifdef MODULE
77 module_param_hw_array(io, int, ioport, NULL, 0);
78 module_param_hw_array(irq, int, irq, NULL, 0);
79 module_param_array(bad, int, NULL, 0);
80 module_param_named(msg_enable, ne_msg_enable, uint, 0444);
81 MODULE_PARM_DESC(io, "I/O base address(es),required");
82 MODULE_PARM_DESC(irq, "IRQ number(s)");
83 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
84 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
85 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
86 MODULE_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
99 that the ne2k probe is the last 8390 based probe to take place (as it
100 is at boot) and so the probe will get confused by any other 8390 cards.
101 ISA 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
109 static unsigned int netcard_portlist[] __initdata = {
110 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
111 };
112 #endif
113
114 static 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
127 MODULE_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. */
131 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
132 bad_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
175 static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
176 static int ne_probe_isapnp(struct net_device *dev);
177
178 static void ne_reset_8390(struct net_device *dev);
179 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
180 int ring_page);
181 static void ne_block_input(struct net_device *dev, int count,
182 struct sk_buff *skb, int ring_offset);
183 static 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
do_ne_probe(struct net_device * dev)208 static 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
ne_probe_isapnp(struct net_device * dev)243 static 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
ne_probe1(struct net_device * dev,unsigned long ioaddr)291 static 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 eth_hw_addr_set(dev, SA_prom);
504
505 pr_cont("%pM\n", dev->dev_addr);
506
507 ei_status.name = name;
508 ei_status.tx_start_page = start_page;
509 ei_status.stop_page = stop_page;
510
511 /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
512 ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
513
514 ei_status.rx_start_page = start_page + TX_PAGES;
515 #ifdef PACKETBUF_MEMSIZE
516 /* Allow the packet buffer size to be overridden by know-it-alls. */
517 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
518 #endif
519
520 ei_status.reset_8390 = &ne_reset_8390;
521 ei_status.block_input = &ne_block_input;
522 ei_status.block_output = &ne_block_output;
523 ei_status.get_8390_hdr = &ne_get_8390_hdr;
524 ei_status.priv = 0;
525
526 dev->netdev_ops = &eip_netdev_ops;
527 NS8390p_init(dev, 0);
528
529 ei_local->msg_enable = ne_msg_enable;
530 ret = register_netdev(dev);
531 if (ret)
532 goto out_irq;
533 netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
534 name, ioaddr, dev->irq);
535 return 0;
536
537 out_irq:
538 free_irq(dev->irq, dev);
539 err_out:
540 release_region(ioaddr, NE_IO_EXTENT);
541 return ret;
542 }
543
544 /* Hard reset the card. This used to pause for the same period that a
545 8390 reset command required, but that shouldn't be necessary. */
546
ne_reset_8390(struct net_device * dev)547 static void ne_reset_8390(struct net_device *dev)
548 {
549 unsigned long reset_start_time = jiffies;
550 struct ei_device *ei_local = netdev_priv(dev);
551
552 netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
553
554 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
555 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
556
557 ei_status.txing = 0;
558 ei_status.dmaing = 0;
559
560 /* This check _should_not_ be necessary, omit eventually. */
561 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
562 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
563 netdev_err(dev, "ne_reset_8390() did not complete.\n");
564 break;
565 }
566 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
567 }
568
569 /* Grab the 8390 specific header. Similar to the block_input routine, but
570 we don't need to be concerned with ring wrap as the header will be at
571 the start of a page, so we optimize accordingly. */
572
ne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)573 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
574 {
575 int nic_base = dev->base_addr;
576
577 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
578
579 if (ei_status.dmaing)
580 {
581 netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
582 "[DMAstat:%d][irqlock:%d].\n",
583 ei_status.dmaing, ei_status.irqlock);
584 return;
585 }
586
587 ei_status.dmaing |= 0x01;
588 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
589 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
590 outb_p(0, nic_base + EN0_RCNTHI);
591 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
592 outb_p(ring_page, nic_base + EN0_RSARHI);
593 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
594
595 if (ei_status.word16)
596 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
597 else
598 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
599
600 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
601 ei_status.dmaing &= ~0x01;
602
603 le16_to_cpus(&hdr->count);
604 }
605
606 /* Block input and output, similar to the Crynwr packet driver. If you
607 are porting to a new ethercard, look at the packet driver source for hints.
608 The NEx000 doesn't share the on-board packet memory -- you have to put
609 the packet out through the "remote DMA" dataport using outb. */
610
ne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)611 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
612 {
613 #ifdef NE_SANITY_CHECK
614 int xfer_count = count;
615 struct ei_device *ei_local = netdev_priv(dev);
616 #endif
617 int nic_base = dev->base_addr;
618 char *buf = skb->data;
619
620 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
621 if (ei_status.dmaing)
622 {
623 netdev_err(dev, "DMAing conflict in ne_block_input "
624 "[DMAstat:%d][irqlock:%d].\n",
625 ei_status.dmaing, ei_status.irqlock);
626 return;
627 }
628 ei_status.dmaing |= 0x01;
629 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
630 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
631 outb_p(count >> 8, nic_base + EN0_RCNTHI);
632 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
633 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
634 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
635 if (ei_status.word16)
636 {
637 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
638 if (count & 0x01)
639 {
640 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
641 #ifdef NE_SANITY_CHECK
642 xfer_count++;
643 #endif
644 }
645 } else {
646 insb(NE_BASE + NE_DATAPORT, buf, count);
647 }
648
649 #ifdef NE_SANITY_CHECK
650 /* This was for the ALPHA version only, but enough people have
651 been encountering problems so it is still here. If you see
652 this message you either 1) have a slightly incompatible clone
653 or 2) have noise/speed problems with your bus. */
654
655 if (netif_msg_rx_status(ei_local))
656 {
657 /* DMA termination address check... */
658 int addr, tries = 20;
659 do {
660 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
661 -- it's broken for Rx on some cards! */
662 int high = inb_p(nic_base + EN0_RSARHI);
663 int low = inb_p(nic_base + EN0_RSARLO);
664 addr = (high << 8) + low;
665 if (((ring_offset + xfer_count) & 0xff) == low)
666 break;
667 } while (--tries > 0);
668 if (tries <= 0)
669 netdev_warn(dev, "RX transfer address mismatch,"
670 "%#4.4x (expected) vs. %#4.4x (actual).\n",
671 ring_offset + xfer_count, addr);
672 }
673 #endif
674 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
675 ei_status.dmaing &= ~0x01;
676 }
677
ne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)678 static void ne_block_output(struct net_device *dev, int count,
679 const unsigned char *buf, const int start_page)
680 {
681 int nic_base = NE_BASE;
682 unsigned long dma_start;
683 #ifdef NE_SANITY_CHECK
684 int retries = 0;
685 struct ei_device *ei_local = netdev_priv(dev);
686 #endif
687
688 /* Round the count up for word writes. Do we need to do this?
689 What effect will an odd byte count have on the 8390?
690 I should check someday. */
691
692 if (ei_status.word16 && (count & 0x01))
693 count++;
694
695 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
696 if (ei_status.dmaing)
697 {
698 netdev_err(dev, "DMAing conflict in ne_block_output."
699 "[DMAstat:%d][irqlock:%d]\n",
700 ei_status.dmaing, ei_status.irqlock);
701 return;
702 }
703 ei_status.dmaing |= 0x01;
704 /* We should already be in page 0, but to be safe... */
705 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
706
707 #ifdef NE_SANITY_CHECK
708 retry:
709 #endif
710
711 #ifdef NE_RW_BUGFIX
712 /* Handle the read-before-write bug the same way as the
713 Crynwr packet driver -- the NatSemi method doesn't work.
714 Actually this doesn't always work either, but if you have
715 problems with your NEx000 this is better than nothing! */
716
717 outb_p(0x42, nic_base + EN0_RCNTLO);
718 outb_p(0x00, nic_base + EN0_RCNTHI);
719 outb_p(0x42, nic_base + EN0_RSARLO);
720 outb_p(0x00, nic_base + EN0_RSARHI);
721 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
722 /* Make certain that the dummy read has occurred. */
723 udelay(6);
724 #endif
725
726 outb_p(ENISR_RDC, nic_base + EN0_ISR);
727
728 /* Now the normal output. */
729 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
730 outb_p(count >> 8, nic_base + EN0_RCNTHI);
731 outb_p(0x00, nic_base + EN0_RSARLO);
732 outb_p(start_page, nic_base + EN0_RSARHI);
733
734 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
735 if (ei_status.word16) {
736 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
737 } else {
738 outsb(NE_BASE + NE_DATAPORT, buf, count);
739 }
740
741 dma_start = jiffies;
742
743 #ifdef NE_SANITY_CHECK
744 /* This was for the ALPHA version only, but enough people have
745 been encountering problems so it is still here. */
746
747 if (netif_msg_tx_queued(ei_local))
748 {
749 /* DMA termination address check... */
750 int addr, tries = 20;
751 do {
752 int high = inb_p(nic_base + EN0_RSARHI);
753 int low = inb_p(nic_base + EN0_RSARLO);
754 addr = (high << 8) + low;
755 if ((start_page << 8) + count == addr)
756 break;
757 } while (--tries > 0);
758
759 if (tries <= 0)
760 {
761 netdev_warn(dev, "Tx packet transfer address mismatch,"
762 "%#4.4x (expected) vs. %#4.4x (actual).\n",
763 (start_page << 8) + count, addr);
764 if (retries++ == 0)
765 goto retry;
766 }
767 }
768 #endif
769
770 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
771 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
772 netdev_warn(dev, "timeout waiting for Tx RDC.\n");
773 ne_reset_8390(dev);
774 NS8390p_init(dev, 1);
775 break;
776 }
777
778 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
779 ei_status.dmaing &= ~0x01;
780 }
781
ne_drv_probe(struct platform_device * pdev)782 static int __init ne_drv_probe(struct platform_device *pdev)
783 {
784 struct net_device *dev;
785 int err, this_dev = pdev->id;
786 struct resource *res;
787
788 dev = alloc_eip_netdev();
789 if (!dev)
790 return -ENOMEM;
791
792 /* ne.c doesn't populate resources in platform_device, but
793 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
794 * with resources.
795 */
796 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
797 if (res) {
798 dev->base_addr = res->start;
799 dev->irq = platform_get_irq(pdev, 0);
800 } else {
801 if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
802 free_netdev(dev);
803 return -EINVAL;
804 }
805 dev->base_addr = io[this_dev];
806 dev->irq = irq[this_dev];
807 dev->mem_end = bad[this_dev];
808 }
809 SET_NETDEV_DEV(dev, &pdev->dev);
810 err = do_ne_probe(dev);
811 if (err) {
812 free_netdev(dev);
813 return err;
814 }
815 platform_set_drvdata(pdev, dev);
816
817 /* Update with any values found by probing, don't update if
818 * resources were specified.
819 */
820 if (!res) {
821 io[this_dev] = dev->base_addr;
822 irq[this_dev] = dev->irq;
823 }
824 return 0;
825 }
826
ne_drv_remove(struct platform_device * pdev)827 static int ne_drv_remove(struct platform_device *pdev)
828 {
829 struct net_device *dev = platform_get_drvdata(pdev);
830
831 if (dev) {
832 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
833 netif_device_detach(dev);
834 unregister_netdev(dev);
835 if (idev)
836 pnp_device_detach(idev);
837 /* Careful ne_drv_remove can be called twice, once from
838 * the platform_driver.remove and again when the
839 * platform_device is being removed.
840 */
841 ei_status.priv = 0;
842 free_irq(dev->irq, dev);
843 release_region(dev->base_addr, NE_IO_EXTENT);
844 free_netdev(dev);
845 }
846 return 0;
847 }
848
849 /* Remove unused devices or all if true. */
ne_loop_rm_unreg(int all)850 static void ne_loop_rm_unreg(int all)
851 {
852 int this_dev;
853 struct platform_device *pdev;
854 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
855 pdev = pdev_ne[this_dev];
856 /* No network device == unused */
857 if (pdev && (!platform_get_drvdata(pdev) || all)) {
858 ne_drv_remove(pdev);
859 platform_device_unregister(pdev);
860 pdev_ne[this_dev] = NULL;
861 }
862 }
863 }
864
865 #ifdef CONFIG_PM
ne_drv_suspend(struct platform_device * pdev,pm_message_t state)866 static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
867 {
868 struct net_device *dev = platform_get_drvdata(pdev);
869
870 if (netif_running(dev)) {
871 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
872 netif_device_detach(dev);
873 if (idev)
874 pnp_stop_dev(idev);
875 }
876 return 0;
877 }
878
ne_drv_resume(struct platform_device * pdev)879 static int ne_drv_resume(struct platform_device *pdev)
880 {
881 struct net_device *dev = platform_get_drvdata(pdev);
882
883 if (netif_running(dev)) {
884 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
885 if (idev)
886 pnp_start_dev(idev);
887 ne_reset_8390(dev);
888 NS8390p_init(dev, 1);
889 netif_device_attach(dev);
890 }
891 return 0;
892 }
893 #else
894 #define ne_drv_suspend NULL
895 #define ne_drv_resume NULL
896 #endif
897
898 static struct platform_driver ne_driver = {
899 .remove = ne_drv_remove,
900 .suspend = ne_drv_suspend,
901 .resume = ne_drv_resume,
902 .driver = {
903 .name = DRV_NAME,
904 },
905 };
906
ne_add_devices(void)907 static void __init ne_add_devices(void)
908 {
909 int this_dev;
910 struct platform_device *pdev;
911
912 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
913 if (pdev_ne[this_dev])
914 continue;
915 pdev = platform_device_register_simple(
916 DRV_NAME, this_dev, NULL, 0);
917 if (IS_ERR(pdev))
918 continue;
919 pdev_ne[this_dev] = pdev;
920 }
921 }
922
ne_init(void)923 static int __init ne_init(void)
924 {
925 int retval;
926
927 if (IS_MODULE(CONFIG_NE2000))
928 ne_add_devices();
929
930 retval = platform_driver_probe(&ne_driver, ne_drv_probe);
931
932 if (IS_MODULE(CONFIG_NE2000) && retval) {
933 if (io[0] == 0)
934 pr_notice("ne.c: You must supply \"io=0xNNN\""
935 " value(s) for ISA cards.\n");
936 ne_loop_rm_unreg(1);
937 return retval;
938 }
939
940 /* Unregister unused platform_devices. */
941 ne_loop_rm_unreg(0);
942 return retval;
943 }
944 module_init(ne_init);
945
946 #if !defined(MODULE) && defined(CONFIG_NETDEV_LEGACY_INIT)
ne_probe(int unit)947 struct net_device * __init ne_probe(int unit)
948 {
949 int this_dev;
950 struct net_device *dev;
951
952 /* Find an empty slot, that is no net_device and zero io port. */
953 this_dev = 0;
954 while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
955 io[this_dev]) {
956 if (++this_dev == MAX_NE_CARDS)
957 return ERR_PTR(-ENOMEM);
958 }
959
960 /* Get irq, io from kernel command line */
961 dev = alloc_eip_netdev();
962 if (!dev)
963 return ERR_PTR(-ENOMEM);
964
965 sprintf(dev->name, "eth%d", unit);
966 netdev_boot_setup_check(dev);
967
968 io[this_dev] = dev->base_addr;
969 irq[this_dev] = dev->irq;
970 bad[this_dev] = dev->mem_end;
971
972 free_netdev(dev);
973
974 ne_add_devices();
975
976 /* return the first device found */
977 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
978 if (pdev_ne[this_dev]) {
979 dev = platform_get_drvdata(pdev_ne[this_dev]);
980 if (dev)
981 return dev;
982 }
983 }
984
985 return ERR_PTR(-ENODEV);
986 }
987 #endif
988
ne_exit(void)989 static void __exit ne_exit(void)
990 {
991 platform_driver_unregister(&ne_driver);
992 ne_loop_rm_unreg(1);
993 }
994 module_exit(ne_exit);
995