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drivers/net: Remove unnecessary returns from void function()s
[net-next-2.6.git] / drivers / net / ne.c
CommitLineData
1da177e4
LT		 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>
ff5688ae 53#include <linux/jiffies.h>
a4d542b9 54#include <linux/platform_device.h>
1da177e4
LT		 55
56#include <asm/system.h>
57#include <asm/io.h>
58
59#include "8390.h"
60
61#define DRV_NAME "ne"
62
63/* Some defines that people can play with if so inclined. */
64
65/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
66#define SUPPORT_NE_BAD_CLONES
fbb80230
DF		 67/* 0xbad = bad sig or no reset ack */
68#define BAD 0xbad
69
70#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
71static struct platform_device *pdev_ne[MAX_NE_CARDS];
72static int io[MAX_NE_CARDS];
73static int irq[MAX_NE_CARDS];
74static int bad[MAX_NE_CARDS];
75
76#ifdef MODULE
77module_param_array(io, int, NULL, 0);
78module_param_array(irq, int, NULL, 0);
79module_param_array(bad, int, NULL, 0);
80MODULE_PARM_DESC(io, "I/O base address(es),required");
81MODULE_PARM_DESC(irq, "IRQ number(s)");
82MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
83MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
84MODULE_LICENSE("GPL");
85#endif /* MODULE */
1da177e4
LT		 86
87/* Do we perform extra sanity checks on stuff ? */
88/* #define NE_SANITY_CHECK */
89
90/* Do we implement the read before write bugfix ? */
91/* #define NE_RW_BUGFIX */
92
93/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
94/* #define PACKETBUF_MEMSIZE 0x40 */
95
fbb80230
DF		 96/* This is set up so that no ISA autoprobe takes place. We can't guarantee
97that the ne2k probe is the last 8390 based probe to take place (as it
98is at boot) and so the probe will get confused by any other 8390 cards.
99ISA device autoprobes on a running machine are not recommended anyway. */
1c08bf10
AN		 100#if !defined(MODULE) && (defined(CONFIG_ISA) || defined(CONFIG_M32R))
101/* Do we need a portlist for the ISA auto-probe ? */
102#define NEEDS_PORTLIST
103#endif
104
1da177e4 105/* A zero-terminated list of I/O addresses to be probed at boot. */
1c08bf10 106#ifdef NEEDS_PORTLIST
1da177e4
LT		 107static unsigned int netcard_portlist[] __initdata = {
108 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
109};
110#endif
111
112static struct isapnp_device_id isapnp_clone_list[] __initdata = {
113 { ISAPNP_CARD_ID('A','X','E',0x2011),
114 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
115 (long) "NetGear EA201" },
116 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
117 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
118 (long) "NN NE2000" },
119 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
120 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
121 (long) "Generic PNP" },
122 { } /* terminate list */
123};
124
125MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
126
127#ifdef SUPPORT_NE_BAD_CLONES
128/* A list of bad clones that we none-the-less recognize. */
129static struct { const char *name8, *name16; unsigned char SAprefix[4];}
130bad_clone_list[] __initdata = {
131 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
132 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
133 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
134 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
135 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
136 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
137 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
138 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
139 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
140 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
141 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
142 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
143 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
c7e65c17 144#ifdef CONFIG_MACH_TX49XX
c5e49fb5 145 {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}}, /* Toshiba built-in */
9cc975e0 146#endif
1da177e4
LT		 147 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
148 {NULL,}
149};
150#endif
151
152/* ---- No user-serviceable parts below ---- */
153
154#define NE_BASE (dev->base_addr)
155#define NE_CMD 0x00
156#define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
157#define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
158#define NE_IO_EXTENT 0x20
159
160#define NE1SM_START_PG 0x20 /* First page of TX buffer */
161#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
162#define NESM_START_PG 0x40 /* First page of TX buffer */
163#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
164
44456d37 165#if defined(CONFIG_PLAT_MAPPI)
1da177e4 166# define DCR_VAL 0x4b
aedc0e52 167#elif defined(CONFIG_PLAT_OAKS32R) || \
c7e65c17 168 defined(CONFIG_MACH_TX49XX)
aedc0e52 169# define DCR_VAL 0x48 /* 8-bit mode */
1da177e4
LT		 170#else
171# define DCR_VAL 0x49
172#endif
173
f0e93c10 174static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
1da177e4
LT		 175static int ne_probe_isapnp(struct net_device *dev);
176
1da177e4
LT		 177static void ne_reset_8390(struct net_device *dev);
178static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
179 int ring_page);
180static void ne_block_input(struct net_device *dev, int count,
181 struct sk_buff *skb, int ring_offset);
182static void ne_block_output(struct net_device *dev, const int count,
183 const unsigned char *buf, const int start_page);
184
6aa20a22 185
1da177e4
LT		 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
207static int __init do_ne_probe(struct net_device *dev)
208{
f0e93c10 209 unsigned long base_addr = dev->base_addr;
1c08bf10 210#ifdef NEEDS_PORTLIST
1da177e4
LT		 211 int orig_irq = dev->irq;
212#endif
213
1da177e4 214 /* First check any supplied i/o locations. User knows best. <cough> */
fbb80230
DF		 215 if (base_addr > 0x1ff) { /* Check a single specified location. */
216 int ret = ne_probe1(dev, base_addr);
217 if (ret)
218 printk(KERN_WARNING "ne.c: No NE*000 card found at "
219 "i/o = %#lx\n", base_addr);
220 return ret;
221 }
1da177e4
LT		 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
1c08bf10 229#ifdef NEEDS_PORTLIST
1da177e4
LT		 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
1da177e4
LT		 242static 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 printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
269 (char *) isapnp_clone_list[i].driver_data,
270 dev->base_addr, dev->irq);
271 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
272 printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
273 pnp_device_detach(idev);
274 return -ENXIO;
275 }
276 ei_status.priv = (unsigned long)idev;
277 break;
278 }
279 if (!idev)
280 continue;
281 return 0;
282 }
283
284 return -ENODEV;
285}
286
f0e93c10 287static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
1da177e4
LT		 288{
289 int i;
290 unsigned char SA_prom[32];
291 int wordlength = 2;
292 const char *name = NULL;
293 int start_page, stop_page;
294 int neX000, ctron, copam, bad_card;
295 int reg0, ret;
296 static unsigned version_printed;
297
298 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
299 return -EBUSY;
300
301 reg0 = inb_p(ioaddr);
302 if (reg0 == 0xFF) {
303 ret = -ENODEV;
304 goto err_out;
305 }
306
307 /* Do a preliminary verification that we have a 8390. */
308 {
309 int regd;
310 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
311 regd = inb_p(ioaddr + 0x0d);
312 outb_p(0xff, ioaddr + 0x0d);
313 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
314 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
315 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
316 outb_p(reg0, ioaddr);
317 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
318 ret = -ENODEV;
319 goto err_out;
320 }
321 }
322
323 if (ei_debug && version_printed++ == 0)
ad361c98 324 printk(KERN_INFO "%s%s", version1, version2);
1da177e4 325
f0e93c10 326 printk(KERN_INFO "NE*000 ethercard probe at %#3lx:", ioaddr);
1da177e4
LT		 327
328 /* A user with a poor card that fails to ack the reset, or that
329 does not have a valid 0x57,0x57 signature can still use this
330 without having to recompile. Specifying an i/o address along
331 with an otherwise unused dev->mem_end value of "0xBAD" will
332 cause the driver to skip these parts of the probe. */
333
fbb80230 334 bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
1da177e4
LT		 335
336 /* Reset card. Who knows what dain-bramaged state it was left in. */
337
338 {
339 unsigned long reset_start_time = jiffies;
340
341 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
342 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
343
344 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 345 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
1da177e4
LT		 346 if (bad_card) {
347 printk(" (warning: no reset ack)");
348 break;
349 } else {
350 printk(" not found (no reset ack).\n");
351 ret = -ENODEV;
352 goto err_out;
353 }
354 }
355
356 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
357 }
358
359 /* Read the 16 bytes of station address PROM.
f0084a36 360 We must first initialize registers, similar to NS8390p_init(eifdev, 0).
1da177e4
LT		 361 We can't reliably read the SAPROM address without this.
362 (I learned the hard way!). */
363 {
364 struct {unsigned char value, offset; } program_seq[] =
365 {
366 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
367 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
368 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
369 {0x00, EN0_RCNTHI},
370 {0x00, EN0_IMR}, /* Mask completion irq. */
371 {0xFF, EN0_ISR},
372 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
373 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
374 {32, EN0_RCNTLO},
375 {0x00, EN0_RCNTHI},
376 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
377 {0x00, EN0_RSARHI},
378 {E8390_RREAD+E8390_START, E8390_CMD},
379 };
380
ff8ac609 381 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
1da177e4
LT		 382 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
383
384 }
385 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
386 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
387 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
388 if (SA_prom[i] != SA_prom[i+1])
389 wordlength = 1;
390 }
391
392 if (wordlength == 2)
393 {
394 for (i = 0; i < 16; i++)
395 SA_prom[i] = SA_prom[i+i];
396 /* We must set the 8390 for word mode. */
397 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
398 start_page = NESM_START_PG;
aedc0e52
SS		 399
400 /*
401 * Realtek RTL8019AS datasheet says that the PSTOP register
402 * shouldn't exceed 0x60 in 8-bit mode.
403 * This chip can be identified by reading the signature from
404 * the remote byte count registers (otherwise write-only)...
405 */
406 if ((DCR_VAL & 0x01) == 0 && /* 8-bit mode */
407 inb(ioaddr + EN0_RCNTLO) == 0x50 &&
408 inb(ioaddr + EN0_RCNTHI) == 0x70)
409 stop_page = 0x60;
410 else
411 stop_page = NESM_STOP_PG;
1da177e4
LT		 412 } else {
413 start_page = NE1SM_START_PG;
aedc0e52 414 stop_page = NE1SM_STOP_PG;
1da177e4
LT		 415 }
416
417#if defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
418 neX000 = ((SA_prom[14] == 0x57 && SA_prom[15] == 0x57)
419 || (SA_prom[14] == 0x42 && SA_prom[15] == 0x42));
420#else
421 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
422#endif
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 printk(" 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 printk(" 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 (ei_debug > 2)
481 printk(" autoirq is %d\n", 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 printk(" 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. */
055e5110 495 ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
1da177e4
LT		 496 if (ret) {
497 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
498 goto err_out;
499 }
500
501 dev->base_addr = ioaddr;
502
503#ifdef CONFIG_PLAT_MAPPI
504 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
505 ioaddr + E8390_CMD); /* 0x61 */
506 for (i = 0 ; i < ETHER_ADDR_LEN ; i++) {
507 dev->dev_addr[i] = SA_prom[i]
508 = inb_p(ioaddr + EN1_PHYS_SHIFT(i));
1da177e4
LT		 509 }
510#else
511 for(i = 0; i < ETHER_ADDR_LEN; i++) {
1da177e4
LT		 512 dev->dev_addr[i] = SA_prom[i];
513 }
514#endif
515
e174961c 516 printk("%pM\n", dev->dev_addr);
1da177e4
LT		 517
518 ei_status.name = name;
519 ei_status.tx_start_page = start_page;
520 ei_status.stop_page = stop_page;
9cc975e0 521
aedc0e52
SS		 522 /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
523 ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
1da177e4
LT		 524
525 ei_status.rx_start_page = start_page + TX_PAGES;
526#ifdef PACKETBUF_MEMSIZE
527 /* Allow the packet buffer size to be overridden by know-it-alls. */
528 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
529#endif
530
531 ei_status.reset_8390 = &ne_reset_8390;
532 ei_status.block_input = &ne_block_input;
533 ei_status.block_output = &ne_block_output;
534 ei_status.get_8390_hdr = &ne_get_8390_hdr;
535 ei_status.priv = 0;
4ef8e768
SH		 536
537 dev->netdev_ops = &eip_netdev_ops;
d02a4e31 538 NS8390p_init(dev, 0);
b1fc5505
HX		 539
540 ret = register_netdev(dev);
541 if (ret)
542 goto out_irq;
f0e93c10
AN		 543 printk(KERN_INFO "%s: %s found at %#lx, using IRQ %d.\n",
544 dev->name, name, ioaddr, dev->irq);
1da177e4
LT		 545 return 0;
546
b1fc5505
HX		 547out_irq:
548 free_irq(dev->irq, dev);
1da177e4
LT		 549err_out:
550 release_region(ioaddr, NE_IO_EXTENT);
551 return ret;
552}
553
1da177e4
LT		 554/* Hard reset the card. This used to pause for the same period that a
555 8390 reset command required, but that shouldn't be necessary. */
556
557static void ne_reset_8390(struct net_device *dev)
558{
559 unsigned long reset_start_time = jiffies;
560
561 if (ei_debug > 1)
562 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
563
564 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
565 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
566
567 ei_status.txing = 0;
568 ei_status.dmaing = 0;
569
570 /* This check _should_not_ be necessary, omit eventually. */
571 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 572 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
1da177e4
LT		 573 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
574 break;
575 }
576 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
577}
578
579/* Grab the 8390 specific header. Similar to the block_input routine, but
580 we don't need to be concerned with ring wrap as the header will be at
581 the start of a page, so we optimize accordingly. */
582
583static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
584{
585 int nic_base = dev->base_addr;
586
587 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
588
589 if (ei_status.dmaing)
590 {
591 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
592 "[DMAstat:%d][irqlock:%d].\n",
593 dev->name, ei_status.dmaing, ei_status.irqlock);
594 return;
595 }
596
597 ei_status.dmaing |= 0x01;
598 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
599 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
600 outb_p(0, nic_base + EN0_RCNTHI);
601 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
602 outb_p(ring_page, nic_base + EN0_RSARHI);
603 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
604
605 if (ei_status.word16)
606 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
607 else
608 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
609
610 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
611 ei_status.dmaing &= ~0x01;
612
613 le16_to_cpus(&hdr->count);
614}
615
616/* Block input and output, similar to the Crynwr packet driver. If you
617 are porting to a new ethercard, look at the packet driver source for hints.
618 The NEx000 doesn't share the on-board packet memory -- you have to put
619 the packet out through the "remote DMA" dataport using outb. */
620
621static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
622{
623#ifdef NE_SANITY_CHECK
624 int xfer_count = count;
625#endif
626 int nic_base = dev->base_addr;
627 char *buf = skb->data;
628
629 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
630 if (ei_status.dmaing)
631 {
632 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
633 "[DMAstat:%d][irqlock:%d].\n",
634 dev->name, ei_status.dmaing, ei_status.irqlock);
635 return;
636 }
637 ei_status.dmaing |= 0x01;
638 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
639 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
640 outb_p(count >> 8, nic_base + EN0_RCNTHI);
641 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
642 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
643 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
644 if (ei_status.word16)
645 {
646 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
647 if (count & 0x01)
648 {
649 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
650#ifdef NE_SANITY_CHECK
651 xfer_count++;
652#endif
653 }
654 } else {
655 insb(NE_BASE + NE_DATAPORT, buf, count);
656 }
657
658#ifdef NE_SANITY_CHECK
659 /* This was for the ALPHA version only, but enough people have
660 been encountering problems so it is still here. If you see
661 this message you either 1) have a slightly incompatible clone
662 or 2) have noise/speed problems with your bus. */
663
664 if (ei_debug > 1)
665 {
666 /* DMA termination address check... */
667 int addr, tries = 20;
668 do {
669 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
670 -- it's broken for Rx on some cards! */
671 int high = inb_p(nic_base + EN0_RSARHI);
672 int low = inb_p(nic_base + EN0_RSARLO);
673 addr = (high << 8) + low;
674 if (((ring_offset + xfer_count) & 0xff) == low)
675 break;
676 } while (--tries > 0);
677 if (tries <= 0)
678 printk(KERN_WARNING "%s: RX transfer address mismatch,"
679 "%#4.4x (expected) vs. %#4.4x (actual).\n",
680 dev->name, ring_offset + xfer_count, addr);
681 }
682#endif
683 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
684 ei_status.dmaing &= ~0x01;
685}
686
687static void ne_block_output(struct net_device *dev, int count,
688 const unsigned char *buf, const int start_page)
689{
690 int nic_base = NE_BASE;
691 unsigned long dma_start;
692#ifdef NE_SANITY_CHECK
693 int retries = 0;
694#endif
695
696 /* Round the count up for word writes. Do we need to do this?
697 What effect will an odd byte count have on the 8390?
698 I should check someday. */
699
700 if (ei_status.word16 && (count & 0x01))
701 count++;
702
703 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
704 if (ei_status.dmaing)
705 {
706 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
707 "[DMAstat:%d][irqlock:%d]\n",
708 dev->name, ei_status.dmaing, ei_status.irqlock);
709 return;
710 }
711 ei_status.dmaing |= 0x01;
712 /* We should already be in page 0, but to be safe... */
713 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
714
715#ifdef NE_SANITY_CHECK
716retry:
717#endif
718
719#ifdef NE8390_RW_BUGFIX
720 /* Handle the read-before-write bug the same way as the
721 Crynwr packet driver -- the NatSemi method doesn't work.
722 Actually this doesn't always work either, but if you have
723 problems with your NEx000 this is better than nothing! */
724
725 outb_p(0x42, nic_base + EN0_RCNTLO);
726 outb_p(0x00, nic_base + EN0_RCNTHI);
727 outb_p(0x42, nic_base + EN0_RSARLO);
728 outb_p(0x00, nic_base + EN0_RSARHI);
729 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
730 /* Make certain that the dummy read has occurred. */
731 udelay(6);
732#endif
733
734 outb_p(ENISR_RDC, nic_base + EN0_ISR);
735
736 /* Now the normal output. */
737 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
738 outb_p(count >> 8, nic_base + EN0_RCNTHI);
739 outb_p(0x00, nic_base + EN0_RSARLO);
740 outb_p(start_page, nic_base + EN0_RSARHI);
741
742 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
743 if (ei_status.word16) {
744 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
745 } else {
746 outsb(NE_BASE + NE_DATAPORT, buf, count);
747 }
748
749 dma_start = jiffies;
750
751#ifdef NE_SANITY_CHECK
752 /* This was for the ALPHA version only, but enough people have
753 been encountering problems so it is still here. */
754
755 if (ei_debug > 1)
756 {
757 /* DMA termination address check... */
758 int addr, tries = 20;
759 do {
760 int high = inb_p(nic_base + EN0_RSARHI);
761 int low = inb_p(nic_base + EN0_RSARLO);
762 addr = (high << 8) + low;
763 if ((start_page << 8) + count == addr)
764 break;
765 } while (--tries > 0);
766
767 if (tries <= 0)
768 {
769 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
770 "%#4.4x (expected) vs. %#4.4x (actual).\n",
771 dev->name, (start_page << 8) + count, addr);
772 if (retries++ == 0)
773 goto retry;
774 }
775 }
776#endif
777
778 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
ff5688ae 779 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
1da177e4
LT		 780 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
781 ne_reset_8390(dev);
d02a4e31 782 NS8390p_init(dev, 1);
1da177e4
LT		 783 break;
784 }
785
786 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
787 ei_status.dmaing &= ~0x01;
1da177e4
LT		 788}
789
a4d542b9
AN		 790static int __init ne_drv_probe(struct platform_device *pdev)
791{
792 struct net_device *dev;
fbb80230 793 int err, this_dev = pdev->id;
a4d542b9 794 struct resource *res;
a4d542b9 795
055e5110 796 dev = alloc_eip_netdev();
a4d542b9
AN		 797 if (!dev)
798 return -ENOMEM;
fbb80230
DF		 799
800 /* ne.c doesn't populate resources in platform_device, but
801 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
802 * with resources.
803 */
804 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
805 if (res) {
806 dev->base_addr = res->start;
807 dev->irq = platform_get_irq(pdev, 0);
808 } else {
809 if (this_dev < 0 || this_dev >= MAX_NE_CARDS)
810 return -EINVAL;
811 dev->base_addr = io[this_dev];
812 dev->irq = irq[this_dev];
813 dev->mem_end = bad[this_dev];
814 }
a4d542b9
AN		 815 err = do_ne_probe(dev);
816 if (err) {
817 free_netdev(dev);
818 return err;
819 }
820 platform_set_drvdata(pdev, dev);
fbb80230
DF		 821
822 /* Update with any values found by probing, don't update if
823 * resources were specified.
824 */
825 if (!res) {
826 io[this_dev] = dev->base_addr;
827 irq[this_dev] = dev->irq;
828 }
a4d542b9
AN		 829 return 0;
830}
831
fbb80230 832static int ne_drv_remove(struct platform_device *pdev)
a4d542b9
AN		 833{
834 struct net_device *dev = platform_get_drvdata(pdev);
835
fbb80230
DF		 836 if (dev) {
837 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
838 netif_device_detach(dev);
839 unregister_netdev(dev);
840 if (idev)
841 pnp_device_detach(idev);
842 /* Careful ne_drv_remove can be called twice, once from
843 * the platform_driver.remove and again when the
844 * platform_device is being removed.
845 */
846 ei_status.priv = 0;
847 free_irq(dev->irq, dev);
848 release_region(dev->base_addr, NE_IO_EXTENT);
849 free_netdev(dev);
850 platform_set_drvdata(pdev, NULL);
851 }
a4d542b9
AN		 852 return 0;
853}
854
fbb80230
DF		 855/* Remove unused devices or all if true. */
856static void ne_loop_rm_unreg(int all)
857{
858 int this_dev;
859 struct platform_device *pdev;
860 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
861 pdev = pdev_ne[this_dev];
862 /* No network device == unused */
863 if (pdev && (!platform_get_drvdata(pdev) || all)) {
864 ne_drv_remove(pdev);
865 platform_device_unregister(pdev);
866 pdev_ne[this_dev] = NULL;
867 }
868 }
869}
870
a4d542b9
AN		 871#ifdef CONFIG_PM
872static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
873{
874 struct net_device *dev = platform_get_drvdata(pdev);
875
539b06fc
DF		 876 if (netif_running(dev)) {
877 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
a4d542b9 878 netif_device_detach(dev);
539b06fc
DF		 879 if (idev)
880 pnp_stop_dev(idev);
881 }
a4d542b9
AN		 882 return 0;
883}
884
885static int ne_drv_resume(struct platform_device *pdev)
886{
887 struct net_device *dev = platform_get_drvdata(pdev);
888
889 if (netif_running(dev)) {
539b06fc
DF		 890 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
891 if (idev)
892 pnp_start_dev(idev);
a4d542b9 893 ne_reset_8390(dev);
d02a4e31 894 NS8390p_init(dev, 1);
a4d542b9
AN		 895 netif_device_attach(dev);
896 }
897 return 0;
898}
899#else
900#define ne_drv_suspend NULL
901#define ne_drv_resume NULL
902#endif
903
904static struct platform_driver ne_driver = {
fbb80230 905 .remove = ne_drv_remove,
a4d542b9
AN		 906 .suspend = ne_drv_suspend,
907 .resume = ne_drv_resume,
908 .driver = {
909 .name = DRV_NAME,
910 .owner = THIS_MODULE,
911 },
912};
913
fbb80230 914static void __init ne_add_devices(void)
a4d542b9 915{
fbb80230
DF		 916 int this_dev;
917 struct platform_device *pdev;
a4d542b9 918
fbb80230
DF		 919 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
920 if (pdev_ne[this_dev])
921 continue;
922 pdev = platform_device_register_simple(
923 DRV_NAME, this_dev, NULL, 0);
924 if (IS_ERR(pdev))
925 continue;
926 pdev_ne[this_dev] = pdev;
927 }
a4d542b9 928}
6aa20a22 929
1da177e4 930#ifdef MODULE
2705d4f8 931int __init init_module(void)
1da177e4 932{
fbb80230
DF		 933 int retval;
934 ne_add_devices();
935 retval = platform_driver_probe(&ne_driver, ne_drv_probe);
936 if (retval) {
937 if (io[0] == 0)
938 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\""
939 " value(s) for ISA cards.\n");
940 ne_loop_rm_unreg(1);
941 return retval;
1da177e4 942 }
1da177e4 943
fbb80230
DF		 944 /* Unregister unused platform_devices. */
945 ne_loop_rm_unreg(0);
946 return retval;
947}
948#else /* MODULE */
949static int __init ne_init(void)
64916f1e 950{
fbb80230
DF		 951 int retval = platform_driver_probe(&ne_driver, ne_drv_probe);
952
953 /* Unregister unused platform_devices. */
954 ne_loop_rm_unreg(0);
955 return retval;
64916f1e 956}
fbb80230 957module_init(ne_init);
64916f1e 958
fbb80230 959struct net_device * __init ne_probe(int unit)
1da177e4
LT		 960{
961 int this_dev;
fbb80230
DF		 962 struct net_device *dev;
963
964 /* Find an empty slot, that is no net_device and zero io port. */
965 this_dev = 0;
966 while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
967 io[this_dev]) {
968 if (++this_dev == MAX_NE_CARDS)
969 return ERR_PTR(-ENOMEM);
970 }
971
972 /* Get irq, io from kernel command line */
973 dev = alloc_eip_netdev();
974 if (!dev)
975 return ERR_PTR(-ENOMEM);
1da177e4 976
fbb80230
DF		 977 sprintf(dev->name, "eth%d", unit);
978 netdev_boot_setup_check(dev);
979
980 io[this_dev] = dev->base_addr;
981 irq[this_dev] = dev->irq;
982 bad[this_dev] = dev->mem_end;
983
984 free_netdev(dev);
985
986 ne_add_devices();
987
988 /* return the first device found */
1da177e4 989 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
fbb80230
DF		 990 if (pdev_ne[this_dev]) {
991 dev = platform_get_drvdata(pdev_ne[this_dev]);
992 if (dev)
993 return dev;
1da177e4
LT		 994 }
995 }
fbb80230
DF		 996
997 return ERR_PTR(-ENODEV);
1da177e4
LT		 998}
999#endif /* MODULE */
fbb80230
DF		 1000
1001static void __exit ne_exit(void)
1002{
1003 platform_driver_unregister(&ne_driver);
1004 ne_loop_rm_unreg(1);
1005}
1006module_exit(ne_exit);
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