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drivers/net: eliminate irq handler impossible checks, needless casts
[deliverable/linux.git] / drivers / net / pcmcia / axnet_cs.c
CommitLineData
1da177e4
LT		 1/*======================================================================
2
3 A PCMCIA ethernet driver for Asix AX88190-based cards
4
5 The Asix AX88190 is a NS8390-derived chipset with a few nasty
6 idiosyncracies that make it very inconvenient to support with a
7 standard 8390 driver. This driver is based on pcnet_cs, with the
8 tweaked 8390 code grafted on the end. Much of what I did was to
9 clean up and update a similar driver supplied by Asix, which was
10 adapted by William Lee, william@asix.com.tw.
11
12 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
13
14 axnet_cs.c 1.28 2002/06/29 06:27:37
15
16 The network driver code is based on Donald Becker's NE2000 code:
17
18 Written 1992,1993 by Donald Becker.
19 Copyright 1993 United States Government as represented by the
20 Director, National Security Agency. This software may be used and
21 distributed according to the terms of the GNU General Public License,
22 incorporated herein by reference.
23 Donald Becker may be reached at becker@scyld.com
24
25======================================================================*/
26
27#include <linux/kernel.h>
28#include <linux/module.h>
29#include <linux/init.h>
30#include <linux/ptrace.h>
31#include <linux/slab.h>
32#include <linux/string.h>
33#include <linux/timer.h>
34#include <linux/delay.h>
35#include <linux/spinlock.h>
36#include <linux/ethtool.h>
37#include <linux/netdevice.h>
b8ab2dc3 38#include <linux/crc32.h>
1da177e4
LT		 39#include "../8390.h"
40
1da177e4
LT		 41#include <pcmcia/cs_types.h>
42#include <pcmcia/cs.h>
43#include <pcmcia/cistpl.h>
44#include <pcmcia/ciscode.h>
45#include <pcmcia/ds.h>
46#include <pcmcia/cisreg.h>
47
48#include <asm/io.h>
49#include <asm/system.h>
50#include <asm/byteorder.h>
51#include <asm/uaccess.h>
52
53#define AXNET_CMD 0x00
54#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
55#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
56#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
57#define AXNET_TEST 0x15 /* Offset of TEST Register port */
58#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
59
60#define AXNET_START_PG 0x40 /* First page of TX buffer */
61#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
62
63#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
64
65#define IS_AX88190 0x0001
66#define IS_AX88790 0x0002
67
68/*====================================================================*/
69
70/* Module parameters */
71
72MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
73MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
74MODULE_LICENSE("GPL");
75
76#ifdef PCMCIA_DEBUG
77#define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
78
79INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
80#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
81static char *version =
82"axnet_cs.c 1.28 2002/06/29 06:27:37 (David Hinds)";
83#else
84#define DEBUG(n, args...)
85#endif
86
87/*====================================================================*/
88
15b99ac1 89static int axnet_config(struct pcmcia_device *link);
fba395ee 90static void axnet_release(struct pcmcia_device *link);
1da177e4
LT		 91static int axnet_open(struct net_device *dev);
92static int axnet_close(struct net_device *dev);
93static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
7282d491 94static const struct ethtool_ops netdev_ethtool_ops;
7d12e780 95static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
1da177e4
LT		 96static void ei_watchdog(u_long arg);
97static void axnet_reset_8390(struct net_device *dev);
98
99static int mdio_read(kio_addr_t addr, int phy_id, int loc);
100static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value);
101
102static void get_8390_hdr(struct net_device *,
103 struct e8390_pkt_hdr *, int);
104static void block_input(struct net_device *dev, int count,
105 struct sk_buff *skb, int ring_offset);
106static void block_output(struct net_device *dev, int count,
107 const u_char *buf, const int start_page);
108
cc3b4866 109static void axnet_detach(struct pcmcia_device *p_dev);
1da177e4 110
1da177e4
LT		 111static void axdev_setup(struct net_device *dev);
112static void AX88190_init(struct net_device *dev, int startp);
113static int ax_open(struct net_device *dev);
114static int ax_close(struct net_device *dev);
7d12e780 115static irqreturn_t ax_interrupt(int irq, void *dev_id);
1da177e4
LT		 116
117/*====================================================================*/
118
119typedef struct axnet_dev_t {
fd238232 120 struct pcmcia_device *p_dev;
1da177e4
LT		 121 dev_node_t node;
122 caddr_t base;
123 struct timer_list watchdog;
124 int stale, fast_poll;
125 u_short link_status;
126 u_char duplex_flag;
127 int phy_id;
128 int flags;
129} axnet_dev_t;
130
131static inline axnet_dev_t *PRIV(struct net_device *dev)
132{
133 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
134 return p;
135}
136
137/*======================================================================
138
139 axnet_attach() creates an "instance" of the driver, allocating
140 local data structures for one device. The device is registered
141 with Card Services.
142
143======================================================================*/
144
15b99ac1 145static int axnet_probe(struct pcmcia_device *link)
1da177e4
LT		 146{
147 axnet_dev_t *info;
1da177e4 148 struct net_device *dev;
1da177e4
LT		 149
150 DEBUG(0, "axnet_attach()\n");
151
152 dev = alloc_netdev(sizeof(struct ei_device) + sizeof(axnet_dev_t),
153 "eth%d", axdev_setup);
154
155 if (!dev)
f8cfa618 156 return -ENOMEM;
1da177e4
LT		 157
158 info = PRIV(dev);
fba395ee 159 info->p_dev = link;
1da177e4
LT		 160 link->priv = dev;
161 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
162 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
163 link->conf.Attributes = CONF_ENABLE_IRQ;
164 link->conf.IntType = INT_MEMORY_AND_IO;
165
166 dev->open = &axnet_open;
167 dev->stop = &axnet_close;
168 dev->do_ioctl = &axnet_ioctl;
169 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
170
15b99ac1 171 return axnet_config(link);
1da177e4
LT		 172} /* axnet_attach */
173
174/*======================================================================
175
176 This deletes a driver "instance". The device is de-registered
177 with Card Services. If it has been released, all local data
178 structures are freed. Otherwise, the structures will be freed
179 when the device is released.
180
181======================================================================*/
182
fba395ee 183static void axnet_detach(struct pcmcia_device *link)
1da177e4
LT		 184{
185 struct net_device *dev = link->priv;
1da177e4
LT		 186
187 DEBUG(0, "axnet_detach(0x%p)\n", link);
188
fd238232 189 if (link->dev_node)
1da177e4
LT		 190 unregister_netdev(dev);
191
e2d40963 192 axnet_release(link);
1da177e4 193
1da177e4
LT		 194 free_netdev(dev);
195} /* axnet_detach */
196
197/*======================================================================
198
199 This probes for a card's hardware address by reading the PROM.
200
201======================================================================*/
202
fba395ee 203static int get_prom(struct pcmcia_device *link)
1da177e4
LT		 204{
205 struct net_device *dev = link->priv;
206 kio_addr_t ioaddr = dev->base_addr;
207 int i, j;
208
209 /* This is based on drivers/net/ne.c */
210 struct {
211 u_char value, offset;
212 } program_seq[] = {
213 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
214 {0x01, EN0_DCFG}, /* Set word-wide access. */
215 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
216 {0x00, EN0_RCNTHI},
217 {0x00, EN0_IMR}, /* Mask completion irq. */
218 {0xFF, EN0_ISR},
219 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
220 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
221 {0x10, EN0_RCNTLO},
222 {0x00, EN0_RCNTHI},
223 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
224 {0x04, EN0_RSARHI},
225 {E8390_RREAD+E8390_START, E8390_CMD},
226 };
227
228 /* Not much of a test, but the alternatives are messy */
229 if (link->conf.ConfigBase != 0x03c0)
230 return 0;
231
232 axnet_reset_8390(dev);
233 mdelay(10);
234
235 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
236 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
237
238 for (i = 0; i < 6; i += 2) {
239 j = inw(ioaddr + AXNET_DATAPORT);
240 dev->dev_addr[i] = j & 0xff;
241 dev->dev_addr[i+1] = j >> 8;
242 }
243 return 1;
244} /* get_prom */
245
246/*======================================================================
247
248 axnet_config() is scheduled to run after a CARD_INSERTION event
249 is received, to configure the PCMCIA socket, and to make the
250 ethernet device available to the system.
251
252======================================================================*/
253
254#define CS_CHECK(fn, ret) \
255do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
256
fba395ee 257static int try_io_port(struct pcmcia_device *link)
1da177e4
LT		 258{
259 int j, ret;
260 if (link->io.NumPorts1 == 32) {
261 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
262 if (link->io.NumPorts2 > 0) {
263 /* for master/slave multifunction cards */
264 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
265 link->irq.Attributes =
266 IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
267 }
268 } else {
269 /* This should be two 16-port windows */
270 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
271 link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
272 }
273 if (link->io.BasePort1 == 0) {
274 link->io.IOAddrLines = 16;
275 for (j = 0; j < 0x400; j += 0x20) {
276 link->io.BasePort1 = j ^ 0x300;
277 link->io.BasePort2 = (j ^ 0x300) + 0x10;
fba395ee 278 ret = pcmcia_request_io(link, &link->io);
1da177e4
LT		 279 if (ret == CS_SUCCESS) return ret;
280 }
281 return ret;
282 } else {
fba395ee 283 return pcmcia_request_io(link, &link->io);
1da177e4
LT		 284 }
285}
286
15b99ac1 287static int axnet_config(struct pcmcia_device *link)
1da177e4 288{
1da177e4
LT		 289 struct net_device *dev = link->priv;
290 axnet_dev_t *info = PRIV(dev);
291 tuple_t tuple;
292 cisparse_t parse;
293 int i, j, last_ret, last_fn;
294 u_short buf[64];
1da177e4
LT		 295
296 DEBUG(0, "axnet_config(0x%p)\n", link);
297
298 tuple.Attributes = 0;
299 tuple.TupleData = (cisdata_t *)buf;
300 tuple.TupleDataMax = sizeof(buf);
301 tuple.TupleOffset = 0;
302 tuple.DesiredTuple = CISTPL_CONFIG;
fba395ee
DB		 303 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
304 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(link, &tuple));
305 CS_CHECK(ParseTuple, pcmcia_parse_tuple(link, &tuple, &parse));
1da177e4
LT		 306 link->conf.ConfigBase = parse.config.base;
307 /* don't trust the CIS on this; Linksys got it wrong */
308 link->conf.Present = 0x63;
309
1da177e4
LT		 310 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
311 tuple.Attributes = 0;
fba395ee 312 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(link, &tuple));
1da177e4
LT		 313 while (last_ret == CS_SUCCESS) {
314 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
315 cistpl_io_t *io = &(parse.cftable_entry.io);
316
fba395ee
DB		 317 if (pcmcia_get_tuple_data(link, &tuple) != 0 ||
318 pcmcia_parse_tuple(link, &tuple, &parse) != 0 ||
1da177e4
LT		 319 cfg->index == 0 || cfg->io.nwin == 0)
320 goto next_entry;
321
322 link->conf.ConfigIndex = 0x05;
323 /* For multifunction cards, by convention, we configure the
324 network function with window 0, and serial with window 1 */
325 if (io->nwin > 1) {
326 i = (io->win[1].len > io->win[0].len);
327 link->io.BasePort2 = io->win[1-i].base;
328 link->io.NumPorts2 = io->win[1-i].len;
329 } else {
330 i = link->io.NumPorts2 = 0;
331 }
332 link->io.BasePort1 = io->win[i].base;
333 link->io.NumPorts1 = io->win[i].len;
334 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
335 if (link->io.NumPorts1 + link->io.NumPorts2 >= 32) {
336 last_ret = try_io_port(link);
337 if (last_ret == CS_SUCCESS) break;
338 }
339 next_entry:
fba395ee 340 last_ret = pcmcia_get_next_tuple(link, &tuple);
1da177e4
LT		 341 }
342 if (last_ret != CS_SUCCESS) {
fba395ee 343 cs_error(link, RequestIO, last_ret);
1da177e4
LT		 344 goto failed;
345 }
346
fba395ee 347 CS_CHECK(RequestIRQ, pcmcia_request_irq(link, &link->irq));
1da177e4
LT		 348
349 if (link->io.NumPorts2 == 8) {
350 link->conf.Attributes |= CONF_ENABLE_SPKR;
351 link->conf.Status = CCSR_AUDIO_ENA;
352 }
353
fba395ee 354 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link, &link->conf));
1da177e4
LT		 355 dev->irq = link->irq.AssignedIRQ;
356 dev->base_addr = link->io.BasePort1;
357
358 if (!get_prom(link)) {
359 printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n");
360 printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n");
361 goto failed;
362 }
363
364 ei_status.name = "AX88190";
365 ei_status.word16 = 1;
366 ei_status.tx_start_page = AXNET_START_PG;
367 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
368 ei_status.stop_page = AXNET_STOP_PG;
369 ei_status.reset_8390 = &axnet_reset_8390;
370 ei_status.get_8390_hdr = &get_8390_hdr;
371 ei_status.block_input = &block_input;
372 ei_status.block_output = &block_output;
373
374 if (inb(dev->base_addr + AXNET_TEST) != 0)
375 info->flags |= IS_AX88790;
376 else
377 info->flags |= IS_AX88190;
378
379 if (info->flags & IS_AX88790)
380 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
381
382 for (i = 0; i < 32; i++) {
383 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
384 if ((j != 0) && (j != 0xffff)) break;
385 }
386
387 /* Maybe PHY is in power down mode. (PPD_SET = 1)
388 Bit 2 of CCSR is active low. */
389 if (i == 32) {
390 conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 };
fba395ee 391 pcmcia_access_configuration_register(link, &reg);
1da177e4
LT		 392 for (i = 0; i < 32; i++) {
393 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
394 if ((j != 0) && (j != 0xffff)) break;
395 }
396 }
397
398 info->phy_id = (i < 32) ? i : -1;
fd238232 399 link->dev_node = &info->node;
fba395ee 400 SET_NETDEV_DEV(dev, &handle_to_dev(link));
1da177e4
LT		 401
402 if (register_netdev(dev) != 0) {
403 printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n");
fd238232 404 link->dev_node = NULL;
1da177e4
LT		 405 goto failed;
406 }
407
408 strcpy(info->node.dev_name, dev->name);
409
410 printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, hw_addr ",
411 dev->name, ((info->flags & IS_AX88790) ? 7 : 1),
412 dev->base_addr, dev->irq);
413 for (i = 0; i < 6; i++)
414 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
415 if (info->phy_id != -1) {
416 DEBUG(0, " MII transceiver at index %d, status %x.\n", info->phy_id, j);
417 } else {
418 printk(KERN_NOTICE " No MII transceivers found!\n");
419 }
15b99ac1 420 return 0;
1da177e4
LT		 421
422cs_failed:
fba395ee 423 cs_error(link, last_fn, last_ret);
1da177e4
LT		 424failed:
425 axnet_release(link);
15b99ac1 426 return -ENODEV;
1da177e4
LT		 427} /* axnet_config */
428
429/*======================================================================
430
431 After a card is removed, axnet_release() will unregister the net
432 device, and release the PCMCIA configuration. If the device is
433 still open, this will be postponed until it is closed.
434
435======================================================================*/
436
fba395ee 437static void axnet_release(struct pcmcia_device *link)
1da177e4 438{
fba395ee 439 pcmcia_disable_device(link);
1da177e4
LT		 440}
441
fba395ee 442static int axnet_suspend(struct pcmcia_device *link)
98e4c28b 443{
98e4c28b
DB		 444 struct net_device *dev = link->priv;
445
e2d40963
DB		 446 if (link->open)
447 netif_device_detach(dev);
98e4c28b
DB		 448
449 return 0;
450}
451
fba395ee 452static int axnet_resume(struct pcmcia_device *link)
98e4c28b 453{
98e4c28b
DB		 454 struct net_device *dev = link->priv;
455
e2d40963 456 if (link->open) {
8661bb5b
DB		 457 axnet_reset_8390(dev);
458 AX88190_init(dev, 1);
459 netif_device_attach(dev);
98e4c28b
DB		 460 }
461
462 return 0;
463}
464
465
1da177e4
LT		 466/*======================================================================
467
468 MII interface support
469
470======================================================================*/
471
472#define MDIO_SHIFT_CLK 0x01
473#define MDIO_DATA_WRITE0 0x00
474#define MDIO_DATA_WRITE1 0x08
475#define MDIO_DATA_READ 0x04
476#define MDIO_MASK 0x0f
477#define MDIO_ENB_IN 0x02
478
479static void mdio_sync(kio_addr_t addr)
480{
481 int bits;
482 for (bits = 0; bits < 32; bits++) {
483 outb_p(MDIO_DATA_WRITE1, addr);
484 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
485 }
486}
487
488static int mdio_read(kio_addr_t addr, int phy_id, int loc)
489{
490 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
491 int i, retval = 0;
492
493 mdio_sync(addr);
494 for (i = 14; i >= 0; i--) {
495 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
496 outb_p(dat, addr);
497 outb_p(dat | MDIO_SHIFT_CLK, addr);
498 }
499 for (i = 19; i > 0; i--) {
500 outb_p(MDIO_ENB_IN, addr);
501 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
502 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
503 }
504 return (retval>>1) & 0xffff;
505}
506
507static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value)
508{
509 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
510 int i;
511
512 mdio_sync(addr);
513 for (i = 31; i >= 0; i--) {
514 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
515 outb_p(dat, addr);
516 outb_p(dat | MDIO_SHIFT_CLK, addr);
517 }
518 for (i = 1; i >= 0; i--) {
519 outb_p(MDIO_ENB_IN, addr);
520 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
521 }
522}
523
524/*====================================================================*/
525
526static int axnet_open(struct net_device *dev)
527{
528 axnet_dev_t *info = PRIV(dev);
fba395ee 529 struct pcmcia_device *link = info->p_dev;
1da177e4
LT		 530
531 DEBUG(2, "axnet_open('%s')\n", dev->name);
532
9940ec36 533 if (!pcmcia_dev_present(link))
1da177e4
LT		 534 return -ENODEV;
535
536 link->open++;
537
1fb9df5d 538 request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
1da177e4
LT		 539
540 info->link_status = 0x00;
541 init_timer(&info->watchdog);
542 info->watchdog.function = &ei_watchdog;
543 info->watchdog.data = (u_long)dev;
544 info->watchdog.expires = jiffies + HZ;
545 add_timer(&info->watchdog);
546
547 return ax_open(dev);
548} /* axnet_open */
549
550/*====================================================================*/
551
552static int axnet_close(struct net_device *dev)
553{
554 axnet_dev_t *info = PRIV(dev);
fba395ee 555 struct pcmcia_device *link = info->p_dev;
1da177e4
LT		 556
557 DEBUG(2, "axnet_close('%s')\n", dev->name);
558
559 ax_close(dev);
560 free_irq(dev->irq, dev);
561
562 link->open--;
563 netif_stop_queue(dev);
564 del_timer_sync(&info->watchdog);
565
566 return 0;
567} /* axnet_close */
568
569/*======================================================================
570
571 Hard reset the card. This used to pause for the same period that
572 a 8390 reset command required, but that shouldn't be necessary.
573
574======================================================================*/
575
576static void axnet_reset_8390(struct net_device *dev)
577{
578 kio_addr_t nic_base = dev->base_addr;
579 int i;
580
581 ei_status.txing = ei_status.dmaing = 0;
582
583 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
584
585 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
586
587 for (i = 0; i < 100; i++) {
588 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
589 break;
590 udelay(100);
591 }
592 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
593
594 if (i == 100)
595 printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n",
596 dev->name);
597
598} /* axnet_reset_8390 */
599
600/*====================================================================*/
601
7d12e780 602static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
1da177e4
LT		 603{
604 struct net_device *dev = dev_id;
605 PRIV(dev)->stale = 0;
7d12e780 606 return ax_interrupt(irq, dev_id);
1da177e4
LT		 607}
608
609static void ei_watchdog(u_long arg)
610{
611 struct net_device *dev = (struct net_device *)(arg);
612 axnet_dev_t *info = PRIV(dev);
613 kio_addr_t nic_base = dev->base_addr;
614 kio_addr_t mii_addr = nic_base + AXNET_MII_EEP;
615 u_short link;
616
617 if (!netif_device_present(dev)) goto reschedule;
618
619 /* Check for pending interrupt with expired latency timer: with
620 this, we can limp along even if the interrupt is blocked */
621 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
622 if (!info->fast_poll)
623 printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
7d12e780 624 ei_irq_wrapper(dev->irq, dev);
1da177e4
LT		 625 info->fast_poll = HZ;
626 }
627 if (info->fast_poll) {
628 info->fast_poll--;
629 info->watchdog.expires = jiffies + 1;
630 add_timer(&info->watchdog);
631 return;
632 }
633
634 if (info->phy_id < 0)
635 goto reschedule;
636 link = mdio_read(mii_addr, info->phy_id, 1);
637 if (!link || (link == 0xffff)) {
638 printk(KERN_INFO "%s: MII is missing!\n", dev->name);
639 info->phy_id = -1;
640 goto reschedule;
641 }
642
643 link &= 0x0004;
644 if (link != info->link_status) {
645 u_short p = mdio_read(mii_addr, info->phy_id, 5);
646 printk(KERN_INFO "%s: %s link beat\n", dev->name,
647 (link) ? "found" : "lost");
648 if (link) {
649 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
650 if (p)
651 printk(KERN_INFO "%s: autonegotiation complete: "
652 "%sbaseT-%cD selected\n", dev->name,
653 ((p & 0x0180) ? "100" : "10"),
654 ((p & 0x0140) ? 'F' : 'H'));
655 else
656 printk(KERN_INFO "%s: link partner did not autonegotiate\n",
657 dev->name);
658 AX88190_init(dev, 1);
659 }
660 info->link_status = link;
661 }
662
663reschedule:
664 info->watchdog.expires = jiffies + HZ;
665 add_timer(&info->watchdog);
666}
667
668static void netdev_get_drvinfo(struct net_device *dev,
669 struct ethtool_drvinfo *info)
670{
671 strcpy(info->driver, "axnet_cs");
672}
673
7282d491 674static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4
LT		 675 .get_drvinfo = netdev_get_drvinfo,
676};
677
678/*====================================================================*/
679
680static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
681{
682 axnet_dev_t *info = PRIV(dev);
683 u16 *data = (u16 *)&rq->ifr_ifru;
684 kio_addr_t mii_addr = dev->base_addr + AXNET_MII_EEP;
685 switch (cmd) {
686 case SIOCGMIIPHY:
687 data[0] = info->phy_id;
688 case SIOCGMIIREG: /* Read MII PHY register. */
689 data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
690 return 0;
691 case SIOCSMIIREG: /* Write MII PHY register. */
692 if (!capable(CAP_NET_ADMIN))
693 return -EPERM;
694 mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
695 return 0;
696 }
697 return -EOPNOTSUPP;
698}
699
700/*====================================================================*/
701
702static void get_8390_hdr(struct net_device *dev,
703 struct e8390_pkt_hdr *hdr,
704 int ring_page)
705{
706 kio_addr_t nic_base = dev->base_addr;
707
708 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
709 outb_p(ring_page, nic_base + EN0_RSARHI);
710 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
711
712 insw(nic_base + AXNET_DATAPORT, hdr,
713 sizeof(struct e8390_pkt_hdr)>>1);
714 /* Fix for big endian systems */
715 hdr->count = le16_to_cpu(hdr->count);
716
717}
718
719/*====================================================================*/
720
721static void block_input(struct net_device *dev, int count,
722 struct sk_buff *skb, int ring_offset)
723{
724 kio_addr_t nic_base = dev->base_addr;
725 int xfer_count = count;
726 char *buf = skb->data;
727
728#ifdef PCMCIA_DEBUG
729 if ((ei_debug > 4) && (count != 4))
730 printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4);
731#endif
732 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
733 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
734 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
735
736 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
737 if (count & 0x01)
738 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
739
740}
741
742/*====================================================================*/
743
744static void block_output(struct net_device *dev, int count,
745 const u_char *buf, const int start_page)
746{
747 kio_addr_t nic_base = dev->base_addr;
748
749#ifdef PCMCIA_DEBUG
750 if (ei_debug > 4)
751 printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count);
752#endif
753
754 /* Round the count up for word writes. Do we need to do this?
755 What effect will an odd byte count have on the 8390?
756 I should check someday. */
757 if (count & 0x01)
758 count++;
759
760 outb_p(0x00, nic_base + EN0_RSARLO);
761 outb_p(start_page, nic_base + EN0_RSARHI);
762 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
763 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
764}
765
c414f755
DB		 766static struct pcmcia_device_id axnet_ids[] = {
767 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
768 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
769 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
770 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
771 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
772 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
773 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
c67eebd6 774 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
2fe22a8b 775 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
c414f755
DB		 776 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
777 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
778 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
779 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
780 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
781 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
782 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
783 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
784 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
785 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
786 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
787 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
788 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
789 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
c414f755
DB		 790 PCMCIA_DEVICE_NULL,
791};
792MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
793
1da177e4
LT		 794static struct pcmcia_driver axnet_cs_driver = {
795 .owner = THIS_MODULE,
796 .drv = {
797 .name = "axnet_cs",
798 },
15b99ac1 799 .probe = axnet_probe,
cc3b4866 800 .remove = axnet_detach,
c414f755 801 .id_table = axnet_ids,
98e4c28b
DB		 802 .suspend = axnet_suspend,
803 .resume = axnet_resume,
1da177e4
LT		 804};
805
806static int __init init_axnet_cs(void)
807{
808 return pcmcia_register_driver(&axnet_cs_driver);
809}
810
811static void __exit exit_axnet_cs(void)
812{
813 pcmcia_unregister_driver(&axnet_cs_driver);
1da177e4
LT		 814}
815
816module_init(init_axnet_cs);
817module_exit(exit_axnet_cs);
818
819/*====================================================================*/
820
821/* 8390.c: A general NS8390 ethernet driver core for linux. */
822/*
823 Written 1992-94 by Donald Becker.
824
825 Copyright 1993 United States Government as represented by the
826 Director, National Security Agency.
827
828 This software may be used and distributed according to the terms
829 of the GNU General Public License, incorporated herein by reference.
830
831 The author may be reached as becker@scyld.com, or C/O
832 Scyld Computing Corporation
833 410 Severn Ave., Suite 210
834 Annapolis MD 21403
835
836 This is the chip-specific code for many 8390-based ethernet adaptors.
837 This is not a complete driver, it must be combined with board-specific
838 code such as ne.c, wd.c, 3c503.c, etc.
839
840 Seeing how at least eight drivers use this code, (not counting the
841 PCMCIA ones either) it is easy to break some card by what seems like
842 a simple innocent change. Please contact me or Donald if you think
843 you have found something that needs changing. -- PG
844
845 Changelog:
846
847 Paul Gortmaker : remove set_bit lock, other cleanups.
848 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
849 ei_block_input() for eth_io_copy_and_sum().
850 Paul Gortmaker : exchange static int ei_pingpong for a #define,
851 also add better Tx error handling.
852 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
853 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
854 Paul Gortmaker : tweak ANK's above multicast changes a bit.
855 Paul Gortmaker : update packet statistics for v2.1.x
856 Alan Cox : support arbitary stupid port mappings on the
857 68K Macintosh. Support >16bit I/O spaces
858 Paul Gortmaker : add kmod support for auto-loading of the 8390
859 module by all drivers that require it.
860 Alan Cox : Spinlocking work, added 'BUG_83C690'
861 Paul Gortmaker : Separate out Tx timeout code from Tx path.
862
863 Sources:
864 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
865
866 */
867
868static const char *version_8390 =
869 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n";
870
871#include <linux/bitops.h>
872#include <asm/irq.h>
873#include <linux/fcntl.h>
874#include <linux/in.h>
875#include <linux/interrupt.h>
876
877#include <linux/etherdevice.h>
878
879#define BUG_83C690
880
881/* These are the operational function interfaces to board-specific
882 routines.
883 void reset_8390(struct net_device *dev)
884 Resets the board associated with DEV, including a hardware reset of
885 the 8390. This is only called when there is a transmit timeout, and
886 it is always followed by 8390_init().
887 void block_output(struct net_device *dev, int count, const unsigned char *buf,
888 int start_page)
889 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
890 "page" value uses the 8390's 256-byte pages.
891 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
892 Read the 4 byte, page aligned 8390 header. *If* there is a
893 subsequent read, it will be of the rest of the packet.
894 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
895 Read COUNT bytes from the packet buffer into the skb data area. Start
896 reading from RING_OFFSET, the address as the 8390 sees it. This will always
897 follow the read of the 8390 header.
898*/
899#define ei_reset_8390 (ei_local->reset_8390)
900#define ei_block_output (ei_local->block_output)
901#define ei_block_input (ei_local->block_input)
902#define ei_get_8390_hdr (ei_local->get_8390_hdr)
903
904/* use 0 for production, 1 for verification, >2 for debug */
905#ifndef ei_debug
906int ei_debug = 1;
907#endif
908
909/* Index to functions. */
910static void ei_tx_intr(struct net_device *dev);
911static void ei_tx_err(struct net_device *dev);
912static void ei_tx_timeout(struct net_device *dev);
913static void ei_receive(struct net_device *dev);
914static void ei_rx_overrun(struct net_device *dev);
915
916/* Routines generic to NS8390-based boards. */
917static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
918 int start_page);
919static void set_multicast_list(struct net_device *dev);
920static void do_set_multicast_list(struct net_device *dev);
921
922/*
923 * SMP and the 8390 setup.
924 *
925 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
926 * a page register that controls bank and packet buffer access. We guard
927 * this with ei_local->page_lock. Nobody should assume or set the page other
928 * than zero when the lock is not held. Lock holders must restore page 0
929 * before unlocking. Even pure readers must take the lock to protect in
930 * page 0.
931 *
932 * To make life difficult the chip can also be very slow. We therefore can't
933 * just use spinlocks. For the longer lockups we disable the irq the device
934 * sits on and hold the lock. We must hold the lock because there is a dual
935 * processor case other than interrupts (get stats/set multicast list in
936 * parallel with each other and transmit).
937 *
938 * Note: in theory we can just disable the irq on the card _but_ there is
939 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
940 * enter lock, take the queued irq. So we waddle instead of flying.
941 *
942 * Finally by special arrangement for the purpose of being generally
943 * annoying the transmit function is called bh atomic. That places
944 * restrictions on the user context callers as disable_irq won't save
945 * them.
946 */
947
948/**
949 * ax_open - Open/initialize the board.
950 * @dev: network device to initialize
951 *
952 * This routine goes all-out, setting everything
953 * up anew at each open, even though many of these registers should only
954 * need to be set once at boot.
955 */
956static int ax_open(struct net_device *dev)
957{
958 unsigned long flags;
959 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
960
961#ifdef HAVE_TX_TIMEOUT
962 /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
963 wrapper that does e.g. media check & then calls ei_tx_timeout. */
964 if (dev->tx_timeout == NULL)
965 dev->tx_timeout = ei_tx_timeout;
966 if (dev->watchdog_timeo <= 0)
967 dev->watchdog_timeo = TX_TIMEOUT;
968#endif
969
970 /*
971 * Grab the page lock so we own the register set, then call
972 * the init function.
973 */
974
975 spin_lock_irqsave(&ei_local->page_lock, flags);
976 AX88190_init(dev, 1);
977 /* Set the flag before we drop the lock, That way the IRQ arrives
978 after its set and we get no silly warnings */
979 netif_start_queue(dev);
980 spin_unlock_irqrestore(&ei_local->page_lock, flags);
981 ei_local->irqlock = 0;
982 return 0;
983}
984
985#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
986
987/**
988 * ax_close - shut down network device
989 * @dev: network device to close
990 *
991 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
992 */
993int ax_close(struct net_device *dev)
994{
995 unsigned long flags;
996
997 /*
998 * Hold the page lock during close
999 */
1000
1001 spin_lock_irqsave(&dev_lock(dev), flags);
1002 AX88190_init(dev, 0);
1003 spin_unlock_irqrestore(&dev_lock(dev), flags);
1004 netif_stop_queue(dev);
1005 return 0;
1006}
1007
1008/**
1009 * ei_tx_timeout - handle transmit time out condition
1010 * @dev: network device which has apparently fallen asleep
1011 *
1012 * Called by kernel when device never acknowledges a transmit has
1013 * completed (or failed) - i.e. never posted a Tx related interrupt.
1014 */
1015
1016void ei_tx_timeout(struct net_device *dev)
1017{
1018 long e8390_base = dev->base_addr;
1019 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1020 int txsr, isr, tickssofar = jiffies - dev->trans_start;
1021 unsigned long flags;
1022
1023 ei_local->stat.tx_errors++;
1024
1025 spin_lock_irqsave(&ei_local->page_lock, flags);
1026 txsr = inb(e8390_base+EN0_TSR);
1027 isr = inb(e8390_base+EN0_ISR);
1028 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1029
1030 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
1031 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
1032 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
1033
1034 if (!isr && !ei_local->stat.tx_packets)
1035 {
1036 /* The 8390 probably hasn't gotten on the cable yet. */
1037 ei_local->interface_num ^= 1; /* Try a different xcvr. */
1038 }
1039
1040 /* Ugly but a reset can be slow, yet must be protected */
1041
1042 disable_irq_nosync(dev->irq);
1043 spin_lock(&ei_local->page_lock);
1044
1045 /* Try to restart the card. Perhaps the user has fixed something. */
1046 ei_reset_8390(dev);
1047 AX88190_init(dev, 1);
1048
1049 spin_unlock(&ei_local->page_lock);
1050 enable_irq(dev->irq);
1051 netif_wake_queue(dev);
1052}
1053
1054/**
1055 * ei_start_xmit - begin packet transmission
1056 * @skb: packet to be sent
1057 * @dev: network device to which packet is sent
1058 *
1059 * Sends a packet to an 8390 network device.
1060 */
1061
1062static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
1063{
1064 long e8390_base = dev->base_addr;
1065 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1066 int length, send_length, output_page;
1067 unsigned long flags;
1068 u8 packet[ETH_ZLEN];
1069
1070 netif_stop_queue(dev);
1071
1072 length = skb->len;
1073
1074 /* Mask interrupts from the ethercard.
1075 SMP: We have to grab the lock here otherwise the IRQ handler
1076 on another CPU can flip window and race the IRQ mask set. We end
1077 up trashing the mcast filter not disabling irqs if we don't lock */
1078
1079 spin_lock_irqsave(&ei_local->page_lock, flags);
1080 outb_p(0x00, e8390_base + EN0_IMR);
1081 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1082
1083 /*
1084 * Slow phase with lock held.
1085 */
1086
1087 disable_irq_nosync(dev->irq);
1088
1089 spin_lock(&ei_local->page_lock);
1090
1091 ei_local->irqlock = 1;
1092
1093 send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
1094
1095 /*
1096 * We have two Tx slots available for use. Find the first free
1097 * slot, and then perform some sanity checks. With two Tx bufs,
1098 * you get very close to transmitting back-to-back packets. With
1099 * only one Tx buf, the transmitter sits idle while you reload the
1100 * card, leaving a substantial gap between each transmitted packet.
1101 */
1102
1103 if (ei_local->tx1 == 0)
1104 {
1105 output_page = ei_local->tx_start_page;
1106 ei_local->tx1 = send_length;
1107 if (ei_debug && ei_local->tx2 > 0)
1108 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
1109 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
1110 }
1111 else if (ei_local->tx2 == 0)
1112 {
1113 output_page = ei_local->tx_start_page + TX_PAGES/2;
1114 ei_local->tx2 = send_length;
1115 if (ei_debug && ei_local->tx1 > 0)
1116 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
1117 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
1118 }
1119 else
1120 { /* We should never get here. */
1121 if (ei_debug)
1122 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1123 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
1124 ei_local->irqlock = 0;
1125 netif_stop_queue(dev);
1126 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1127 spin_unlock(&ei_local->page_lock);
1128 enable_irq(dev->irq);
1129 ei_local->stat.tx_errors++;
1130 return 1;
1131 }
1132
1133 /*
1134 * Okay, now upload the packet and trigger a send if the transmitter
1135 * isn't already sending. If it is busy, the interrupt handler will
1136 * trigger the send later, upon receiving a Tx done interrupt.
1137 */
1138
1139 if (length == skb->len)
1140 ei_block_output(dev, length, skb->data, output_page);
1141 else {
1142 memset(packet, 0, ETH_ZLEN);
1143 memcpy(packet, skb->data, skb->len);
1144 ei_block_output(dev, length, packet, output_page);
1145 }
1146
1147 if (! ei_local->txing)
1148 {
1149 ei_local->txing = 1;
1150 NS8390_trigger_send(dev, send_length, output_page);
1151 dev->trans_start = jiffies;
1152 if (output_page == ei_local->tx_start_page)
1153 {
1154 ei_local->tx1 = -1;
1155 ei_local->lasttx = -1;
1156 }
1157 else
1158 {
1159 ei_local->tx2 = -1;
1160 ei_local->lasttx = -2;
1161 }
1162 }
1163 else ei_local->txqueue++;
1164
1165 if (ei_local->tx1 && ei_local->tx2)
1166 netif_stop_queue(dev);
1167 else
1168 netif_start_queue(dev);
1169
1170 /* Turn 8390 interrupts back on. */
1171 ei_local->irqlock = 0;
1172 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1173
1174 spin_unlock(&ei_local->page_lock);
1175 enable_irq(dev->irq);
1176
1177 dev_kfree_skb (skb);
1178 ei_local->stat.tx_bytes += send_length;
1179
1180 return 0;
1181}
1182
1183/**
1184 * ax_interrupt - handle the interrupts from an 8390
1185 * @irq: interrupt number
1186 * @dev_id: a pointer to the net_device
1187 * @regs: unused
1188 *
1189 * Handle the ether interface interrupts. We pull packets from
1190 * the 8390 via the card specific functions and fire them at the networking
1191 * stack. We also handle transmit completions and wake the transmit path if
1192 * necessary. We also update the counters and do other housekeeping as
1193 * needed.
1194 */
1195
7d12e780 1196static irqreturn_t ax_interrupt(int irq, void *dev_id)
1da177e4
LT		 1197{
1198 struct net_device *dev = dev_id;
1199 long e8390_base;
1200 int interrupts, nr_serviced = 0, i;
1201 struct ei_device *ei_local;
1202 int handled = 0;
1203
1da177e4 1204 e8390_base = dev->base_addr;
c31f28e7 1205 ei_local = netdev_priv(dev);
1da177e4
LT		 1206
1207 /*
1208 * Protect the irq test too.
1209 */
1210
1211 spin_lock(&ei_local->page_lock);
1212
1213 if (ei_local->irqlock)
1214 {
1215#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1216 /* The "irqlock" check is only for testing. */
1217 printk(ei_local->irqlock
1218 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
1219 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
1220 dev->name, inb_p(e8390_base + EN0_ISR),
1221 inb_p(e8390_base + EN0_IMR));
1222#endif
1223 spin_unlock(&ei_local->page_lock);
1224 return IRQ_NONE;
1225 }
1226
1227 if (ei_debug > 3)
1228 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
1229 inb_p(e8390_base + EN0_ISR));
1230
1231 outb_p(0x00, e8390_base + EN0_ISR);
1232 ei_local->irqlock = 1;
1233
1234 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1235 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
1236 && ++nr_serviced < MAX_SERVICE)
1237 {
1238 if (!netif_running(dev) || (interrupts == 0xff)) {
1239 if (ei_debug > 1)
1240 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
1241 outb_p(interrupts, e8390_base + EN0_ISR);
1242 interrupts = 0;
1243 break;
1244 }
1245 handled = 1;
1246
1247 /* AX88190 bug fix. */
1248 outb_p(interrupts, e8390_base + EN0_ISR);
1249 for (i = 0; i < 10; i++) {
1250 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1251 break;
1252 outb_p(0, e8390_base + EN0_ISR);
1253 outb_p(interrupts, e8390_base + EN0_ISR);
1254 }
1255 if (interrupts & ENISR_OVER)
1256 ei_rx_overrun(dev);
1257 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1258 {
1259 /* Got a good (?) packet. */
1260 ei_receive(dev);
1261 }
1262 /* Push the next to-transmit packet through. */
1263 if (interrupts & ENISR_TX)
1264 ei_tx_intr(dev);
1265 else if (interrupts & ENISR_TX_ERR)
1266 ei_tx_err(dev);
1267
1268 if (interrupts & ENISR_COUNTERS)
1269 {
1270 ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1271 ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1272 ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1273 }
1274 }
1275
1276 if (interrupts && ei_debug)
1277 {
1278 handled = 1;
1279 if (nr_serviced >= MAX_SERVICE)
1280 {
1281 /* 0xFF is valid for a card removal */
1282 if(interrupts!=0xFF)
1283 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
1284 dev->name, interrupts);
1285 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1286 } else {
1287 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
1288 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1289 }
1290 }
1291
1292 /* Turn 8390 interrupts back on. */
1293 ei_local->irqlock = 0;
1294 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1295
1296 spin_unlock(&ei_local->page_lock);
1297 return IRQ_RETVAL(handled);
1298}
1299
1300/**
1301 * ei_tx_err - handle transmitter error
1302 * @dev: network device which threw the exception
1303 *
1304 * A transmitter error has happened. Most likely excess collisions (which
1305 * is a fairly normal condition). If the error is one where the Tx will
1306 * have been aborted, we try and send another one right away, instead of
1307 * letting the failed packet sit and collect dust in the Tx buffer. This
1308 * is a much better solution as it avoids kernel based Tx timeouts, and
1309 * an unnecessary card reset.
1310 *
1311 * Called with lock held.
1312 */
1313
1314static void ei_tx_err(struct net_device *dev)
1315{
1316 long e8390_base = dev->base_addr;
1317 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1318 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1319 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1320
1321#ifdef VERBOSE_ERROR_DUMP
1322 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
1323 if (txsr & ENTSR_ABT)
1324 printk("excess-collisions ");
1325 if (txsr & ENTSR_ND)
1326 printk("non-deferral ");
1327 if (txsr & ENTSR_CRS)
1328 printk("lost-carrier ");
1329 if (txsr & ENTSR_FU)
1330 printk("FIFO-underrun ");
1331 if (txsr & ENTSR_CDH)
1332 printk("lost-heartbeat ");
1333 printk("\n");
1334#endif
1335
1336 if (tx_was_aborted)
1337 ei_tx_intr(dev);
1338 else
1339 {
1340 ei_local->stat.tx_errors++;
1341 if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
1342 if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
1343 if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
1344 }
1345}
1346
1347/**
1348 * ei_tx_intr - transmit interrupt handler
1349 * @dev: network device for which tx intr is handled
1350 *
1351 * We have finished a transmit: check for errors and then trigger the next
1352 * packet to be sent. Called with lock held.
1353 */
1354
1355static void ei_tx_intr(struct net_device *dev)
1356{
1357 long e8390_base = dev->base_addr;
1358 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1359 int status = inb(e8390_base + EN0_TSR);
1360
1361 /*
1362 * There are two Tx buffers, see which one finished, and trigger
1363 * the send of another one if it exists.
1364 */
1365 ei_local->txqueue--;
1366
1367 if (ei_local->tx1 < 0)
1368 {
1369 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1370 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
1371 ei_local->name, ei_local->lasttx, ei_local->tx1);
1372 ei_local->tx1 = 0;
1373 if (ei_local->tx2 > 0)
1374 {
1375 ei_local->txing = 1;
1376 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1377 dev->trans_start = jiffies;
1378 ei_local->tx2 = -1,
1379 ei_local->lasttx = 2;
1380 }
1381 else ei_local->lasttx = 20, ei_local->txing = 0;
1382 }
1383 else if (ei_local->tx2 < 0)
1384 {
1385 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1386 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
1387 ei_local->name, ei_local->lasttx, ei_local->tx2);
1388 ei_local->tx2 = 0;
1389 if (ei_local->tx1 > 0)
1390 {
1391 ei_local->txing = 1;
1392 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1393 dev->trans_start = jiffies;
1394 ei_local->tx1 = -1;
1395 ei_local->lasttx = 1;
1396 }
1397 else
1398 ei_local->lasttx = 10, ei_local->txing = 0;
1399 }
1400// else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
1401// dev->name, ei_local->lasttx);
1402
1403 /* Minimize Tx latency: update the statistics after we restart TXing. */
1404 if (status & ENTSR_COL)
1405 ei_local->stat.collisions++;
1406 if (status & ENTSR_PTX)
1407 ei_local->stat.tx_packets++;
1408 else
1409 {
1410 ei_local->stat.tx_errors++;
1411 if (status & ENTSR_ABT)
1412 {
1413 ei_local->stat.tx_aborted_errors++;
1414 ei_local->stat.collisions += 16;
1415 }
1416 if (status & ENTSR_CRS)
1417 ei_local->stat.tx_carrier_errors++;
1418 if (status & ENTSR_FU)
1419 ei_local->stat.tx_fifo_errors++;
1420 if (status & ENTSR_CDH)
1421 ei_local->stat.tx_heartbeat_errors++;
1422 if (status & ENTSR_OWC)
1423 ei_local->stat.tx_window_errors++;
1424 }
1425 netif_wake_queue(dev);
1426}
1427
1428/**
1429 * ei_receive - receive some packets
1430 * @dev: network device with which receive will be run
1431 *
1432 * We have a good packet(s), get it/them out of the buffers.
1433 * Called with lock held.
1434 */
1435
1436static void ei_receive(struct net_device *dev)
1437{
1438 long e8390_base = dev->base_addr;
1439 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1440 unsigned char rxing_page, this_frame, next_frame;
1441 unsigned short current_offset;
1442 int rx_pkt_count = 0;
1443 struct e8390_pkt_hdr rx_frame;
1444
1445 while (++rx_pkt_count < 10)
1446 {
1447 int pkt_len, pkt_stat;
1448
1449 /* Get the rx page (incoming packet pointer). */
1450 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1451
1452 /* Remove one frame from the ring. Boundary is always a page behind. */
1453 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1454 if (this_frame >= ei_local->stop_page)
1455 this_frame = ei_local->rx_start_page;
1456
1457 /* Someday we'll omit the previous, iff we never get this message.
1458 (There is at least one clone claimed to have a problem.)
1459
1460 Keep quiet if it looks like a card removal. One problem here
1461 is that some clones crash in roughly the same way.
1462 */
1463 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1464 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
1465 dev->name, this_frame, ei_local->current_page);
1466
1467 if (this_frame == rxing_page) /* Read all the frames? */
1468 break; /* Done for now */
1469
1470 current_offset = this_frame << 8;
1471 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1472
1473 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1474 pkt_stat = rx_frame.status;
1475
1476 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1477
1478 if (pkt_len < 60 || pkt_len > 1518)
1479 {
1480 if (ei_debug)
1481 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
1482 dev->name, rx_frame.count, rx_frame.status,
1483 rx_frame.next);
1484 ei_local->stat.rx_errors++;
1485 ei_local->stat.rx_length_errors++;
1486 }
1487 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1488 {
1489 struct sk_buff *skb;
1490
1491 skb = dev_alloc_skb(pkt_len+2);
1492 if (skb == NULL)
1493 {
1494 if (ei_debug > 1)
1495 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
1496 dev->name, pkt_len);
1497 ei_local->stat.rx_dropped++;
1498 break;
1499 }
1500 else
1501 {
1502 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1503 skb->dev = dev;
1504 skb_put(skb, pkt_len); /* Make room */
1505 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1506 skb->protocol=eth_type_trans(skb,dev);
1507 netif_rx(skb);
1508 dev->last_rx = jiffies;
1509 ei_local->stat.rx_packets++;
1510 ei_local->stat.rx_bytes += pkt_len;
1511 if (pkt_stat & ENRSR_PHY)
1512 ei_local->stat.multicast++;
1513 }
1514 }
1515 else
1516 {
1517 if (ei_debug)
1518 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1519 dev->name, rx_frame.status, rx_frame.next,
1520 rx_frame.count);
1521 ei_local->stat.rx_errors++;
1522 /* NB: The NIC counts CRC, frame and missed errors. */
1523 if (pkt_stat & ENRSR_FO)
1524 ei_local->stat.rx_fifo_errors++;
1525 }
1526 next_frame = rx_frame.next;
1527
1528 /* This _should_ never happen: it's here for avoiding bad clones. */
1529 if (next_frame >= ei_local->stop_page) {
1530 printk("%s: next frame inconsistency, %#2x\n", dev->name,
1531 next_frame);
1532 next_frame = ei_local->rx_start_page;
1533 }
1534 ei_local->current_page = next_frame;
1535 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1536 }
1537
1538 return;
1539}
1540
1541/**
1542 * ei_rx_overrun - handle receiver overrun
1543 * @dev: network device which threw exception
1544 *
1545 * We have a receiver overrun: we have to kick the 8390 to get it started
1546 * again. Problem is that you have to kick it exactly as NS prescribes in
1547 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1548 * This includes causing "the NIC to defer indefinitely when it is stopped
1549 * on a busy network." Ugh.
1550 * Called with lock held. Don't call this with the interrupts off or your
1551 * computer will hate you - it takes 10ms or so.
1552 */
1553
1554static void ei_rx_overrun(struct net_device *dev)
1555{
ff768cd7 1556 axnet_dev_t *info = PRIV(dev);
1da177e4
LT		 1557 long e8390_base = dev->base_addr;
1558 unsigned char was_txing, must_resend = 0;
1559 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1560
1561 /*
1562 * Record whether a Tx was in progress and then issue the
1563 * stop command.
1564 */
1565 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1566 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1567
1568 if (ei_debug > 1)
1569 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
1570 ei_local->stat.rx_over_errors++;
1571
1572 /*
1573 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1574 * Early datasheets said to poll the reset bit, but now they say that
1575 * it "is not a reliable indicator and subsequently should be ignored."
1576 * We wait at least 10ms.
1577 */
1578
1579 mdelay(10);
1580
1581 /*
1582 * Reset RBCR[01] back to zero as per magic incantation.
1583 */
1584 outb_p(0x00, e8390_base+EN0_RCNTLO);
1585 outb_p(0x00, e8390_base+EN0_RCNTHI);
1586
1587 /*
1588 * See if any Tx was interrupted or not. According to NS, this
1589 * step is vital, and skipping it will cause no end of havoc.
1590 */
1591
1592 if (was_txing)
1593 {
1594 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1595 if (!tx_completed)
1596 must_resend = 1;
1597 }
1598
1599 /*
1600 * Have to enter loopback mode and then restart the NIC before
1601 * you are allowed to slurp packets up off the ring.
1602 */
1603 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1604 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1605
1606 /*
1607 * Clear the Rx ring of all the debris, and ack the interrupt.
1608 */
1609 ei_receive(dev);
1610
1611 /*
1612 * Leave loopback mode, and resend any packet that got stopped.
1613 */
1614 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1615 if (must_resend)
1616 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1617}
1618
1619/*
1620 * Collect the stats. This is called unlocked and from several contexts.
1621 */
1622
1623static struct net_device_stats *get_stats(struct net_device *dev)
1624{
1625 long ioaddr = dev->base_addr;
1626 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1627 unsigned long flags;
1628
1629 /* If the card is stopped, just return the present stats. */
1630 if (!netif_running(dev))
1631 return &ei_local->stat;
1632
1633 spin_lock_irqsave(&ei_local->page_lock,flags);
1634 /* Read the counter registers, assuming we are in page 0. */
1635 ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1636 ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1637 ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1638 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1639
1640 return &ei_local->stat;
1641}
1642
b8ab2dc3
K		 1643/*
1644 * Form the 64 bit 8390 multicast table from the linked list of addresses
1645 * associated with this dev structure.
1646 */
1647
1648static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1649{
1650 struct dev_mc_list *dmi;
1651 u32 crc;
1652
1653 for (dmi=dev->mc_list; dmi; dmi=dmi->next) {
1654
1655 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
1656 /*
1657 * The 8390 uses the 6 most significant bits of the
1658 * CRC to index the multicast table.
1659 */
1660 bits[crc>>29] |= (1<<((crc>>26)&7));
1661 }
1662}
1663
1da177e4
LT		 1664/**
1665 * do_set_multicast_list - set/clear multicast filter
1666 * @dev: net device for which multicast filter is adjusted
1667 *
b8ab2dc3
K		 1668 * Set or clear the multicast filter for this adaptor.
1669 * Must be called with lock held.
1da177e4
LT		 1670 */
1671
1672static void do_set_multicast_list(struct net_device *dev)
1673{
1674 long e8390_base = dev->base_addr;
b8ab2dc3
K		 1675 int i;
1676 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
1677
1678 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1679 memset(ei_local->mcfilter, 0, 8);
1680 if (dev->mc_list)
1681 make_mc_bits(ei_local->mcfilter, dev);
1682 } else {
1683 /* set to accept-all */
1684 memset(ei_local->mcfilter, 0xFF, 8);
1685 }
1686
b8ab2dc3
K		 1687 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1688 for(i = 0; i < 8; i++)
1689 {
1690 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1691 }
1692 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1da177e4
LT		 1693
1694 if(dev->flags&IFF_PROMISC)
1695 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1696 else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
1697 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1698 else
1699 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
f905703a
K		 1700
1701 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1da177e4
LT		 1702}
1703
1704/*
1705 * Called without lock held. This is invoked from user context and may
1706 * be parallel to just about everything else. Its also fairly quick and
1707 * not called too often. Must protect against both bh and irq users
1708 */
1709
1710static void set_multicast_list(struct net_device *dev)
1711{
1712 unsigned long flags;
1713
1714 spin_lock_irqsave(&dev_lock(dev), flags);
1715 do_set_multicast_list(dev);
1716 spin_unlock_irqrestore(&dev_lock(dev), flags);
1717}
1718
1719/**
1720 * axdev_setup - init rest of 8390 device struct
1721 * @dev: network device structure to init
1722 *
1723 * Initialize the rest of the 8390 device structure. Do NOT __init
1724 * this, as it is used by 8390 based modular drivers too.
1725 */
1726
1727static void axdev_setup(struct net_device *dev)
1728{
1729 struct ei_device *ei_local;
1730 if (ei_debug > 1)
1731 printk(version_8390);
1732
1733 SET_MODULE_OWNER(dev);
1734
1735
1736 ei_local = (struct ei_device *)netdev_priv(dev);
1737 spin_lock_init(&ei_local->page_lock);
1738
1739 dev->hard_start_xmit = &ei_start_xmit;
1740 dev->get_stats = get_stats;
1741 dev->set_multicast_list = &set_multicast_list;
1742
1743 ether_setup(dev);
1744}
1745
1746/* This page of functions should be 8390 generic */
1747/* Follow National Semi's recommendations for initializing the "NIC". */
1748
1749/**
1750 * AX88190_init - initialize 8390 hardware
1751 * @dev: network device to initialize
1752 * @startp: boolean. non-zero value to initiate chip processing
1753 *
1754 * Must be called with lock held.
1755 */
1756
1757static void AX88190_init(struct net_device *dev, int startp)
1758{
1759 axnet_dev_t *info = PRIV(dev);
1760 long e8390_base = dev->base_addr;
1761 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1762 int i;
1763 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1764
1765 if(sizeof(struct e8390_pkt_hdr)!=4)
1766 panic("8390.c: header struct mispacked\n");
1767 /* Follow National Semi's recommendations for initing the DP83902. */
1768 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1769 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1770 /* Clear the remote byte count registers. */
1771 outb_p(0x00, e8390_base + EN0_RCNTLO);
1772 outb_p(0x00, e8390_base + EN0_RCNTHI);
1773 /* Set to monitor and loopback mode -- this is vital!. */
1774 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1775 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1776 /* Set the transmit page and receive ring. */
1777 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1778 ei_local->tx1 = ei_local->tx2 = 0;
1779 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1780 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1781 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1782 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1783 /* Clear the pending interrupts and mask. */
1784 outb_p(0xFF, e8390_base + EN0_ISR);
1785 outb_p(0x00, e8390_base + EN0_IMR);
1786
1787 /* Copy the station address into the DS8390 registers. */
1788
1789 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1790 for(i = 0; i < 6; i++)
1791 {
1792 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1793 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1794 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1795 }
1da177e4
LT		 1796
1797 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1798 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1799
1800 netif_start_queue(dev);
1801 ei_local->tx1 = ei_local->tx2 = 0;
1802 ei_local->txing = 0;
1803
1804 if (startp)
1805 {
1806 outb_p(0xff, e8390_base + EN0_ISR);
1807 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1808 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1809 outb_p(E8390_TXCONFIG | info->duplex_flag,
1810 e8390_base + EN0_TXCR); /* xmit on. */
1811 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1812 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1813 do_set_multicast_list(dev); /* (re)load the mcast table */
1814 }
1815}
1816
1817/* Trigger a transmit start, assuming the length is valid.
1818 Always called with the page lock held */
1819
1820static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1821 int start_page)
1822{
1823 long e8390_base = dev->base_addr;
1824 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1825
1826 if (inb_p(e8390_base) & E8390_TRANS)
1827 {
1828 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1829 dev->name);
1830 return;
1831 }
1832 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1833 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1834 outb_p(start_page, e8390_base + EN0_TPSR);
1835 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1836}
Linux kernel - Deliverables
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