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1// SPDX-License-Identifier: GPL-1.0+
2
3/*======================================================================
4
5 A PCMCIA ethernet driver for Asix AX88190-based cards
6
7 The Asix AX88190 is a NS8390-derived chipset with a few nasty
8 idiosyncracies that make it very inconvenient to support with a
9 standard 8390 driver. This driver is based on pcnet_cs, with the
10 tweaked 8390 code grafted on the end. Much of what I did was to
11 clean up and update a similar driver supplied by Asix, which was
12 adapted by William Lee, william@asix.com.tw.
13
14 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
15
16 axnet_cs.c 1.28 2002/06/29 06:27:37
17
18 The network driver code is based on Donald Becker's NE2000 code:
19
20 Written 1992,1993 by Donald Becker.
21 Copyright 1993 United States Government as represented by the
22 Director, National Security Agency.
23 Donald Becker may be reached at becker@scyld.com
24
25======================================================================*/
26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/ptrace.h>
32#include <linux/string.h>
33#include <linux/timer.h>
34#include <linux/delay.h>
35#include <linux/spinlock.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/crc32.h>
39#include <linux/mii.h>
40#include "8390.h"
41
42#include <pcmcia/cistpl.h>
43#include <pcmcia/ciscode.h>
44#include <pcmcia/ds.h>
45#include <pcmcia/cisreg.h>
46
47#include <asm/io.h>
48#include <asm/byteorder.h>
49#include <linux/uaccess.h>
50
51#define AXNET_CMD 0x00
52#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
53#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
54#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
55#define AXNET_TEST 0x15 /* Offset of TEST Register port */
56#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
57
58#define AXNET_START_PG 0x40 /* First page of TX buffer */
59#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
60
61#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
62
63#define IS_AX88190 0x0001
64#define IS_AX88790 0x0002
65
66/*====================================================================*/
67
68/* Module parameters */
69
70MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
71MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
72MODULE_LICENSE("GPL");
73
74
75/*====================================================================*/
76
77static int axnet_config(struct pcmcia_device *link);
78static void axnet_release(struct pcmcia_device *link);
79static int axnet_open(struct net_device *dev);
80static int axnet_close(struct net_device *dev);
81static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
82static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
83 struct net_device *dev);
84static struct net_device_stats *get_stats(struct net_device *dev);
85static void set_multicast_list(struct net_device *dev);
86static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue);
87static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
88static void ei_watchdog(struct timer_list *t);
89static void axnet_reset_8390(struct net_device *dev);
90
91static int mdio_read(unsigned int addr, int phy_id, int loc);
92static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
93
94static void get_8390_hdr(struct net_device *,
95 struct e8390_pkt_hdr *, int);
96static void block_input(struct net_device *dev, int count,
97 struct sk_buff *skb, int ring_offset);
98static void block_output(struct net_device *dev, int count,
99 const u_char *buf, const int start_page);
100
101static void axnet_detach(struct pcmcia_device *p_dev);
102
103static void AX88190_init(struct net_device *dev, int startp);
104static int ax_open(struct net_device *dev);
105static int ax_close(struct net_device *dev);
106static irqreturn_t ax_interrupt(int irq, void *dev_id);
107
108/*====================================================================*/
109
110struct axnet_dev {
111 struct pcmcia_device *p_dev;
112 caddr_t base;
113 struct timer_list watchdog;
114 int stale, fast_poll;
115 u_short link_status;
116 u_char duplex_flag;
117 int phy_id;
118 int flags;
119 int active_low;
120};
121
122static inline struct axnet_dev *PRIV(struct net_device *dev)
123{
124 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
125 return p;
126}
127
128static const struct net_device_ops axnet_netdev_ops = {
129 .ndo_open = axnet_open,
130 .ndo_stop = axnet_close,
131 .ndo_eth_ioctl = axnet_ioctl,
132 .ndo_start_xmit = axnet_start_xmit,
133 .ndo_tx_timeout = axnet_tx_timeout,
134 .ndo_get_stats = get_stats,
135 .ndo_set_rx_mode = set_multicast_list,
136 .ndo_set_mac_address = eth_mac_addr,
137 .ndo_validate_addr = eth_validate_addr,
138};
139
140static int axnet_probe(struct pcmcia_device *link)
141{
142 struct axnet_dev *info;
143 struct net_device *dev;
144 struct ei_device *ei_local;
145
146 dev_dbg(&link->dev, "axnet_attach()\n");
147
148 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev));
149 if (!dev)
150 return -ENOMEM;
151
152 ei_local = netdev_priv(dev);
153 spin_lock_init(&ei_local->page_lock);
154
155 info = PRIV(dev);
156 info->p_dev = link;
157 link->priv = dev;
158 link->config_flags |= CONF_ENABLE_IRQ;
159
160 dev->netdev_ops = &axnet_netdev_ops;
161
162 dev->watchdog_timeo = TX_TIMEOUT;
163
164 return axnet_config(link);
165} /* axnet_attach */
166
167static void axnet_detach(struct pcmcia_device *link)
168{
169 struct net_device *dev = link->priv;
170
171 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
172
173 unregister_netdev(dev);
174
175 axnet_release(link);
176
177 free_netdev(dev);
178} /* axnet_detach */
179
180/*======================================================================
181
182 This probes for a card's hardware address by reading the PROM.
183
184======================================================================*/
185
186static int get_prom(struct pcmcia_device *link)
187{
188 struct net_device *dev = link->priv;
189 unsigned int ioaddr = dev->base_addr;
190 u8 addr[ETH_ALEN];
191 int i, j;
192
193 /* This is based on drivers/net/ethernet/8390/ne.c */
194 struct {
195 u_char value, offset;
196 } program_seq[] = {
197 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
198 {0x01, EN0_DCFG}, /* Set word-wide access. */
199 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
200 {0x00, EN0_RCNTHI},
201 {0x00, EN0_IMR}, /* Mask completion irq. */
202 {0xFF, EN0_ISR},
203 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
204 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
205 {0x10, EN0_RCNTLO},
206 {0x00, EN0_RCNTHI},
207 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
208 {0x04, EN0_RSARHI},
209 {E8390_RREAD+E8390_START, E8390_CMD},
210 };
211
212 /* Not much of a test, but the alternatives are messy */
213 if (link->config_base != 0x03c0)
214 return 0;
215
216 axnet_reset_8390(dev);
217 mdelay(10);
218
219 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
220 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
221
222 for (i = 0; i < 6; i += 2) {
223 j = inw(ioaddr + AXNET_DATAPORT);
224 addr[i] = j & 0xff;
225 addr[i+1] = j >> 8;
226 }
227 eth_hw_addr_set(dev, addr);
228
229 return 1;
230} /* get_prom */
231
232static int try_io_port(struct pcmcia_device *link)
233{
234 int j, ret;
235 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
236 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
237 if (link->resource[0]->end == 32) {
238 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
239 /* for master/slave multifunction cards */
240 if (link->resource[1]->end > 0)
241 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
242 } else {
243 /* This should be two 16-port windows */
244 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
245 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
246 }
247 if (link->resource[0]->start == 0) {
248 for (j = 0; j < 0x400; j += 0x20) {
249 link->resource[0]->start = j ^ 0x300;
250 link->resource[1]->start = (j ^ 0x300) + 0x10;
251 link->io_lines = 16;
252 ret = pcmcia_request_io(link);
253 if (ret == 0)
254 return ret;
255 }
256 return ret;
257 } else {
258 return pcmcia_request_io(link);
259 }
260}
261
262static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
263{
264 if (p_dev->config_index == 0)
265 return -EINVAL;
266
267 p_dev->config_index = 0x05;
268 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
269 return -ENODEV;
270
271 return try_io_port(p_dev);
272}
273
274static int axnet_config(struct pcmcia_device *link)
275{
276 struct net_device *dev = link->priv;
277 struct axnet_dev *info = PRIV(dev);
278 int i, j, j2, ret;
279
280 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
281
282 /* don't trust the CIS on this; Linksys got it wrong */
283 link->config_regs = 0x63;
284 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
285 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
286 if (ret != 0)
287 goto failed;
288
289 if (!link->irq)
290 goto failed;
291
292 if (resource_size(link->resource[1]) == 8)
293 link->config_flags |= CONF_ENABLE_SPKR;
294
295 ret = pcmcia_enable_device(link);
296 if (ret)
297 goto failed;
298
299 dev->irq = link->irq;
300 dev->base_addr = link->resource[0]->start;
301
302 if (!get_prom(link)) {
303 pr_notice("this is not an AX88190 card!\n");
304 pr_notice("use pcnet_cs instead.\n");
305 goto failed;
306 }
307
308 ei_status.name = "AX88190";
309 ei_status.word16 = 1;
310 ei_status.tx_start_page = AXNET_START_PG;
311 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
312 ei_status.stop_page = AXNET_STOP_PG;
313 ei_status.reset_8390 = axnet_reset_8390;
314 ei_status.get_8390_hdr = get_8390_hdr;
315 ei_status.block_input = block_input;
316 ei_status.block_output = block_output;
317
318 if (inb(dev->base_addr + AXNET_TEST) != 0)
319 info->flags |= IS_AX88790;
320 else
321 info->flags |= IS_AX88190;
322
323 if (info->flags & IS_AX88790)
324 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
325
326 info->active_low = 0;
327
328 for (i = 0; i < 32; i++) {
329 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
330 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
331 if (j == j2) continue;
332 if ((j != 0) && (j != 0xffff)) break;
333 }
334
335 if (i == 32) {
336 /* Maybe PHY is in power down mode. (PPD_SET = 1)
337 Bit 2 of CCSR is active low. */
338 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
339 for (i = 0; i < 32; i++) {
340 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
341 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
342 if (j == j2) continue;
343 if ((j != 0) && (j != 0xffff)) {
344 info->active_low = 1;
345 break;
346 }
347 }
348 }
349
350 info->phy_id = (i < 32) ? i : -1;
351 SET_NETDEV_DEV(dev, &link->dev);
352
353 if (register_netdev(dev) != 0) {
354 pr_notice("register_netdev() failed\n");
355 goto failed;
356 }
357
358 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
359 ((info->flags & IS_AX88790) ? 7 : 1),
360 dev->base_addr, dev->irq, dev->dev_addr);
361 if (info->phy_id != -1) {
362 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
363 info->phy_id, j);
364 } else {
365 netdev_notice(dev, " No MII transceivers found!\n");
366 }
367 return 0;
368
369failed:
370 axnet_release(link);
371 return -ENODEV;
372} /* axnet_config */
373
374static void axnet_release(struct pcmcia_device *link)
375{
376 pcmcia_disable_device(link);
377}
378
379static int axnet_suspend(struct pcmcia_device *link)
380{
381 struct net_device *dev = link->priv;
382
383 if (link->open)
384 netif_device_detach(dev);
385
386 return 0;
387}
388
389static int axnet_resume(struct pcmcia_device *link)
390{
391 struct net_device *dev = link->priv;
392 struct axnet_dev *info = PRIV(dev);
393
394 if (link->open) {
395 if (info->active_low == 1)
396 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
397
398 axnet_reset_8390(dev);
399 AX88190_init(dev, 1);
400 netif_device_attach(dev);
401 }
402
403 return 0;
404}
405
406
407/*======================================================================
408
409 MII interface support
410
411======================================================================*/
412
413#define MDIO_SHIFT_CLK 0x01
414#define MDIO_DATA_WRITE0 0x00
415#define MDIO_DATA_WRITE1 0x08
416#define MDIO_DATA_READ 0x04
417#define MDIO_MASK 0x0f
418#define MDIO_ENB_IN 0x02
419
420static void mdio_sync(unsigned int addr)
421{
422 int bits;
423 for (bits = 0; bits < 32; bits++) {
424 outb_p(MDIO_DATA_WRITE1, addr);
425 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
426 }
427}
428
429static int mdio_read(unsigned int addr, int phy_id, int loc)
430{
431 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
432 int i, retval = 0;
433
434 mdio_sync(addr);
435 for (i = 14; i >= 0; i--) {
436 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
437 outb_p(dat, addr);
438 outb_p(dat | MDIO_SHIFT_CLK, addr);
439 }
440 for (i = 19; i > 0; i--) {
441 outb_p(MDIO_ENB_IN, addr);
442 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
443 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
444 }
445 return (retval>>1) & 0xffff;
446}
447
448static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
449{
450 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
451 int i;
452
453 mdio_sync(addr);
454 for (i = 31; i >= 0; i--) {
455 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
456 outb_p(dat, addr);
457 outb_p(dat | MDIO_SHIFT_CLK, addr);
458 }
459 for (i = 1; i >= 0; i--) {
460 outb_p(MDIO_ENB_IN, addr);
461 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
462 }
463}
464
465/*====================================================================*/
466
467static int axnet_open(struct net_device *dev)
468{
469 int ret;
470 struct axnet_dev *info = PRIV(dev);
471 struct pcmcia_device *link = info->p_dev;
472 unsigned int nic_base = dev->base_addr;
473
474 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
475
476 if (!pcmcia_dev_present(link))
477 return -ENODEV;
478
479 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
480 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
481 if (ret)
482 return ret;
483
484 link->open++;
485
486 info->link_status = 0x00;
487 timer_setup(&info->watchdog, ei_watchdog, 0);
488 mod_timer(&info->watchdog, jiffies + HZ);
489
490 return ax_open(dev);
491} /* axnet_open */
492
493/*====================================================================*/
494
495static int axnet_close(struct net_device *dev)
496{
497 struct axnet_dev *info = PRIV(dev);
498 struct pcmcia_device *link = info->p_dev;
499
500 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
501
502 ax_close(dev);
503 free_irq(dev->irq, dev);
504
505 link->open--;
506 netif_stop_queue(dev);
507 del_timer_sync(&info->watchdog);
508
509 return 0;
510} /* axnet_close */
511
512/*======================================================================
513
514 Hard reset the card. This used to pause for the same period that
515 a 8390 reset command required, but that shouldn't be necessary.
516
517======================================================================*/
518
519static void axnet_reset_8390(struct net_device *dev)
520{
521 unsigned int nic_base = dev->base_addr;
522 int i;
523
524 ei_status.txing = ei_status.dmaing = 0;
525
526 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
527
528 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
529
530 for (i = 0; i < 100; i++) {
531 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
532 break;
533 udelay(100);
534 }
535 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
536
537 if (i == 100)
538 netdev_err(dev, "axnet_reset_8390() did not complete\n");
539
540} /* axnet_reset_8390 */
541
542/*====================================================================*/
543
544static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
545{
546 struct net_device *dev = dev_id;
547 PRIV(dev)->stale = 0;
548 return ax_interrupt(irq, dev_id);
549}
550
551static void ei_watchdog(struct timer_list *t)
552{
553 struct axnet_dev *info = from_timer(info, t, watchdog);
554 struct net_device *dev = info->p_dev->priv;
555 unsigned int nic_base = dev->base_addr;
556 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
557 u_short link;
558
559 if (!netif_device_present(dev)) goto reschedule;
560
561 /* Check for pending interrupt with expired latency timer: with
562 this, we can limp along even if the interrupt is blocked */
563 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
564 if (!info->fast_poll)
565 netdev_info(dev, "interrupt(s) dropped!\n");
566 ei_irq_wrapper(dev->irq, dev);
567 info->fast_poll = HZ;
568 }
569 if (info->fast_poll) {
570 info->fast_poll--;
571 info->watchdog.expires = jiffies + 1;
572 add_timer(&info->watchdog);
573 return;
574 }
575
576 if (info->phy_id < 0)
577 goto reschedule;
578 link = mdio_read(mii_addr, info->phy_id, 1);
579 if (!link || (link == 0xffff)) {
580 netdev_info(dev, "MII is missing!\n");
581 info->phy_id = -1;
582 goto reschedule;
583 }
584
585 link &= 0x0004;
586 if (link != info->link_status) {
587 u_short p = mdio_read(mii_addr, info->phy_id, 5);
588 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
589 if (link) {
590 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
591 if (p)
592 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
593 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
594 else
595 netdev_info(dev, "link partner did not autonegotiate\n");
596 AX88190_init(dev, 1);
597 }
598 info->link_status = link;
599 }
600
601reschedule:
602 info->watchdog.expires = jiffies + HZ;
603 add_timer(&info->watchdog);
604}
605
606/*====================================================================*/
607
608static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
609{
610 struct axnet_dev *info = PRIV(dev);
611 struct mii_ioctl_data *data = if_mii(rq);
612 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
613 switch (cmd) {
614 case SIOCGMIIPHY:
615 data->phy_id = info->phy_id;
616 fallthrough;
617 case SIOCGMIIREG: /* Read MII PHY register. */
618 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
619 return 0;
620 case SIOCSMIIREG: /* Write MII PHY register. */
621 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
622 return 0;
623 }
624 return -EOPNOTSUPP;
625}
626
627/*====================================================================*/
628
629static void get_8390_hdr(struct net_device *dev,
630 struct e8390_pkt_hdr *hdr,
631 int ring_page)
632{
633 unsigned int nic_base = dev->base_addr;
634
635 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
636 outb_p(ring_page, nic_base + EN0_RSARHI);
637 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
638
639 insw(nic_base + AXNET_DATAPORT, hdr,
640 sizeof(struct e8390_pkt_hdr)>>1);
641 /* Fix for big endian systems */
642 hdr->count = le16_to_cpu(hdr->count);
643
644}
645
646/*====================================================================*/
647
648static void block_input(struct net_device *dev, int count,
649 struct sk_buff *skb, int ring_offset)
650{
651 unsigned int nic_base = dev->base_addr;
652 struct ei_device *ei_local = netdev_priv(dev);
653 char *buf = skb->data;
654
655 if ((netif_msg_rx_status(ei_local)) && (count != 4))
656 netdev_dbg(dev, "[bi=%d]\n", count+4);
657 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
658 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
659 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
660
661 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
662 if (count & 0x01) {
663 buf[count-1] = inb(nic_base + AXNET_DATAPORT);
664 }
665}
666
667/*====================================================================*/
668
669static void block_output(struct net_device *dev, int count,
670 const u_char *buf, const int start_page)
671{
672 unsigned int nic_base = dev->base_addr;
673
674 pr_debug("%s: [bo=%d]\n", dev->name, count);
675
676 /* Round the count up for word writes. Do we need to do this?
677 What effect will an odd byte count have on the 8390?
678 I should check someday. */
679 if (count & 0x01)
680 count++;
681
682 outb_p(0x00, nic_base + EN0_RSARLO);
683 outb_p(start_page, nic_base + EN0_RSARHI);
684 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
685 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
686}
687
688static const struct pcmcia_device_id axnet_ids[] = {
689 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
690 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
691 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
692 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
693 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
694 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
695 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
696 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
697 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
698 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
699 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
700 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
701 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
702 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
703 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
704 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
705 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
706 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
707 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
708 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
709 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
710 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
711 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
712 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
713 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
714 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
715 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
716 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
717 PCMCIA_DEVICE_NULL,
718};
719MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
720
721static struct pcmcia_driver axnet_cs_driver = {
722 .owner = THIS_MODULE,
723 .name = "axnet_cs",
724 .probe = axnet_probe,
725 .remove = axnet_detach,
726 .id_table = axnet_ids,
727 .suspend = axnet_suspend,
728 .resume = axnet_resume,
729};
730module_pcmcia_driver(axnet_cs_driver);
731
732/*====================================================================*/
733
734/* 8390.c: A general NS8390 ethernet driver core for linux. */
735/*
736 Written 1992-94 by Donald Becker.
737
738 Copyright 1993 United States Government as represented by the
739 Director, National Security Agency.
740
741 This software may be used and distributed according to the terms
742 of the GNU General Public License, incorporated herein by reference.
743
744 The author may be reached as becker@scyld.com, or C/O
745 Scyld Computing Corporation
746 410 Severn Ave., Suite 210
747 Annapolis MD 21403
748
749 This is the chip-specific code for many 8390-based ethernet adaptors.
750 This is not a complete driver, it must be combined with board-specific
751 code such as ne.c, wd.c, 3c503.c, etc.
752
753 Seeing how at least eight drivers use this code, (not counting the
754 PCMCIA ones either) it is easy to break some card by what seems like
755 a simple innocent change. Please contact me or Donald if you think
756 you have found something that needs changing. -- PG
757
758 Changelog:
759
760 Paul Gortmaker : remove set_bit lock, other cleanups.
761 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
762 ei_block_input() for eth_io_copy_and_sum().
763 Paul Gortmaker : exchange static int ei_pingpong for a #define,
764 also add better Tx error handling.
765 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
766 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
767 Paul Gortmaker : tweak ANK's above multicast changes a bit.
768 Paul Gortmaker : update packet statistics for v2.1.x
769 Alan Cox : support arbitrary stupid port mappings on the
770 68K Macintosh. Support >16bit I/O spaces
771 Paul Gortmaker : add kmod support for auto-loading of the 8390
772 module by all drivers that require it.
773 Alan Cox : Spinlocking work, added 'BUG_83C690'
774 Paul Gortmaker : Separate out Tx timeout code from Tx path.
775
776 Sources:
777 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
778
779 */
780
781#include <linux/bitops.h>
782#include <asm/irq.h>
783#include <linux/fcntl.h>
784#include <linux/in.h>
785#include <linux/interrupt.h>
786
787#define BUG_83C690
788
789/* These are the operational function interfaces to board-specific
790 routines.
791 void reset_8390(struct net_device *dev)
792 Resets the board associated with DEV, including a hardware reset of
793 the 8390. This is only called when there is a transmit timeout, and
794 it is always followed by 8390_init().
795 void block_output(struct net_device *dev, int count, const unsigned char *buf,
796 int start_page)
797 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
798 "page" value uses the 8390's 256-byte pages.
799 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
800 Read the 4 byte, page aligned 8390 header. *If* there is a
801 subsequent read, it will be of the rest of the packet.
802 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
803 Read COUNT bytes from the packet buffer into the skb data area. Start
804 reading from RING_OFFSET, the address as the 8390 sees it. This will always
805 follow the read of the 8390 header.
806*/
807#define ei_reset_8390 (ei_local->reset_8390)
808#define ei_block_output (ei_local->block_output)
809#define ei_block_input (ei_local->block_input)
810#define ei_get_8390_hdr (ei_local->get_8390_hdr)
811
812/* Index to functions. */
813static void ei_tx_intr(struct net_device *dev);
814static void ei_tx_err(struct net_device *dev);
815static void ei_receive(struct net_device *dev);
816static void ei_rx_overrun(struct net_device *dev);
817
818/* Routines generic to NS8390-based boards. */
819static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
820 int start_page);
821static void do_set_multicast_list(struct net_device *dev);
822
823/*
824 * SMP and the 8390 setup.
825 *
826 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
827 * a page register that controls bank and packet buffer access. We guard
828 * this with ei_local->page_lock. Nobody should assume or set the page other
829 * than zero when the lock is not held. Lock holders must restore page 0
830 * before unlocking. Even pure readers must take the lock to protect in
831 * page 0.
832 *
833 * To make life difficult the chip can also be very slow. We therefore can't
834 * just use spinlocks. For the longer lockups we disable the irq the device
835 * sits on and hold the lock. We must hold the lock because there is a dual
836 * processor case other than interrupts (get stats/set multicast list in
837 * parallel with each other and transmit).
838 *
839 * Note: in theory we can just disable the irq on the card _but_ there is
840 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
841 * enter lock, take the queued irq. So we waddle instead of flying.
842 *
843 * Finally by special arrangement for the purpose of being generally
844 * annoying the transmit function is called bh atomic. That places
845 * restrictions on the user context callers as disable_irq won't save
846 * them.
847 */
848
849/**
850 * ax_open - Open/initialize the board.
851 * @dev: network device to initialize
852 *
853 * This routine goes all-out, setting everything
854 * up anew at each open, even though many of these registers should only
855 * need to be set once at boot.
856 */
857static int ax_open(struct net_device *dev)
858{
859 unsigned long flags;
860 struct ei_device *ei_local = netdev_priv(dev);
861
862 /*
863 * Grab the page lock so we own the register set, then call
864 * the init function.
865 */
866
867 spin_lock_irqsave(&ei_local->page_lock, flags);
868 AX88190_init(dev, 1);
869 /* Set the flag before we drop the lock, That way the IRQ arrives
870 after its set and we get no silly warnings */
871 netif_start_queue(dev);
872 spin_unlock_irqrestore(&ei_local->page_lock, flags);
873 ei_local->irqlock = 0;
874 return 0;
875}
876
877#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
878
879/**
880 * ax_close - shut down network device
881 * @dev: network device to close
882 *
883 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
884 */
885static int ax_close(struct net_device *dev)
886{
887 unsigned long flags;
888
889 /*
890 * Hold the page lock during close
891 */
892
893 spin_lock_irqsave(&dev_lock(dev), flags);
894 AX88190_init(dev, 0);
895 spin_unlock_irqrestore(&dev_lock(dev), flags);
896 netif_stop_queue(dev);
897 return 0;
898}
899
900/**
901 * axnet_tx_timeout - handle transmit time out condition
902 * @dev: network device which has apparently fallen asleep
903 * @txqueue: unused
904 *
905 * Called by kernel when device never acknowledges a transmit has
906 * completed (or failed) - i.e. never posted a Tx related interrupt.
907 */
908
909static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue)
910{
911 long e8390_base = dev->base_addr;
912 struct ei_device *ei_local = netdev_priv(dev);
913 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
914 unsigned long flags;
915
916 dev->stats.tx_errors++;
917
918 spin_lock_irqsave(&ei_local->page_lock, flags);
919 txsr = inb(e8390_base+EN0_TSR);
920 isr = inb(e8390_base+EN0_ISR);
921 spin_unlock_irqrestore(&ei_local->page_lock, flags);
922
923 netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
924 (txsr & ENTSR_ABT) ? "excess collisions." :
925 (isr) ? "lost interrupt?" : "cable problem?",
926 txsr, isr, tickssofar);
927
928 if (!isr && !dev->stats.tx_packets)
929 {
930 /* The 8390 probably hasn't gotten on the cable yet. */
931 ei_local->interface_num ^= 1; /* Try a different xcvr. */
932 }
933
934 /* Ugly but a reset can be slow, yet must be protected */
935
936 spin_lock_irqsave(&ei_local->page_lock, flags);
937
938 /* Try to restart the card. Perhaps the user has fixed something. */
939 ei_reset_8390(dev);
940 AX88190_init(dev, 1);
941
942 spin_unlock_irqrestore(&ei_local->page_lock, flags);
943 netif_wake_queue(dev);
944}
945
946/**
947 * axnet_start_xmit - begin packet transmission
948 * @skb: packet to be sent
949 * @dev: network device to which packet is sent
950 *
951 * Sends a packet to an 8390 network device.
952 */
953
954static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
955 struct net_device *dev)
956{
957 long e8390_base = dev->base_addr;
958 struct ei_device *ei_local = netdev_priv(dev);
959 int length, send_length, output_page;
960 unsigned long flags;
961 u8 packet[ETH_ZLEN];
962
963 netif_stop_queue(dev);
964
965 length = skb->len;
966
967 /* Mask interrupts from the ethercard.
968 SMP: We have to grab the lock here otherwise the IRQ handler
969 on another CPU can flip window and race the IRQ mask set. We end
970 up trashing the mcast filter not disabling irqs if we don't lock */
971
972 spin_lock_irqsave(&ei_local->page_lock, flags);
973 outb_p(0x00, e8390_base + EN0_IMR);
974
975 /*
976 * Slow phase with lock held.
977 */
978
979 ei_local->irqlock = 1;
980
981 send_length = max(length, ETH_ZLEN);
982
983 /*
984 * We have two Tx slots available for use. Find the first free
985 * slot, and then perform some sanity checks. With two Tx bufs,
986 * you get very close to transmitting back-to-back packets. With
987 * only one Tx buf, the transmitter sits idle while you reload the
988 * card, leaving a substantial gap between each transmitted packet.
989 */
990
991 if (ei_local->tx1 == 0)
992 {
993 output_page = ei_local->tx_start_page;
994 ei_local->tx1 = send_length;
995 if ((netif_msg_tx_queued(ei_local)) &&
996 ei_local->tx2 > 0)
997 netdev_dbg(dev,
998 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
999 ei_local->tx2, ei_local->lasttx,
1000 ei_local->txing);
1001 }
1002 else if (ei_local->tx2 == 0)
1003 {
1004 output_page = ei_local->tx_start_page + TX_PAGES/2;
1005 ei_local->tx2 = send_length;
1006 if ((netif_msg_tx_queued(ei_local)) &&
1007 ei_local->tx1 > 0)
1008 netdev_dbg(dev,
1009 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1010 ei_local->tx1, ei_local->lasttx,
1011 ei_local->txing);
1012 }
1013 else
1014 { /* We should never get here. */
1015 netif_dbg(ei_local, tx_err, dev,
1016 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1017 ei_local->tx1, ei_local->tx2,
1018 ei_local->lasttx);
1019 ei_local->irqlock = 0;
1020 netif_stop_queue(dev);
1021 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1022 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1023 dev->stats.tx_errors++;
1024 return NETDEV_TX_BUSY;
1025 }
1026
1027 /*
1028 * Okay, now upload the packet and trigger a send if the transmitter
1029 * isn't already sending. If it is busy, the interrupt handler will
1030 * trigger the send later, upon receiving a Tx done interrupt.
1031 */
1032
1033 if (length == skb->len)
1034 ei_block_output(dev, length, skb->data, output_page);
1035 else {
1036 memset(packet, 0, ETH_ZLEN);
1037 skb_copy_from_linear_data(skb, packet, skb->len);
1038 ei_block_output(dev, length, packet, output_page);
1039 }
1040
1041 if (! ei_local->txing)
1042 {
1043 ei_local->txing = 1;
1044 NS8390_trigger_send(dev, send_length, output_page);
1045 netif_trans_update(dev);
1046 if (output_page == ei_local->tx_start_page)
1047 {
1048 ei_local->tx1 = -1;
1049 ei_local->lasttx = -1;
1050 }
1051 else
1052 {
1053 ei_local->tx2 = -1;
1054 ei_local->lasttx = -2;
1055 }
1056 }
1057 else ei_local->txqueue++;
1058
1059 if (ei_local->tx1 && ei_local->tx2)
1060 netif_stop_queue(dev);
1061 else
1062 netif_start_queue(dev);
1063
1064 /* Turn 8390 interrupts back on. */
1065 ei_local->irqlock = 0;
1066 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1067
1068 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1069
1070 dev_kfree_skb (skb);
1071 dev->stats.tx_bytes += send_length;
1072
1073 return NETDEV_TX_OK;
1074}
1075
1076/**
1077 * ax_interrupt - handle the interrupts from an 8390
1078 * @irq: interrupt number
1079 * @dev_id: a pointer to the net_device
1080 *
1081 * Handle the ether interface interrupts. We pull packets from
1082 * the 8390 via the card specific functions and fire them at the networking
1083 * stack. We also handle transmit completions and wake the transmit path if
1084 * necessary. We also update the counters and do other housekeeping as
1085 * needed.
1086 */
1087
1088static irqreturn_t ax_interrupt(int irq, void *dev_id)
1089{
1090 struct net_device *dev = dev_id;
1091 long e8390_base;
1092 int interrupts, nr_serviced = 0, i;
1093 struct ei_device *ei_local;
1094 int handled = 0;
1095 unsigned long flags;
1096
1097 e8390_base = dev->base_addr;
1098 ei_local = netdev_priv(dev);
1099
1100 /*
1101 * Protect the irq test too.
1102 */
1103
1104 spin_lock_irqsave(&ei_local->page_lock, flags);
1105
1106 if (ei_local->irqlock) {
1107#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1108 const char *msg;
1109 /* The "irqlock" check is only for testing. */
1110 if (ei_local->irqlock)
1111 msg = "Interrupted while interrupts are masked!";
1112 else
1113 msg = "Reentering the interrupt handler!";
1114 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1115 msg,
1116 inb_p(e8390_base + EN0_ISR),
1117 inb_p(e8390_base + EN0_IMR));
1118#endif
1119 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1120 return IRQ_NONE;
1121 }
1122
1123 netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
1124 inb_p(e8390_base + EN0_ISR));
1125
1126 outb_p(0x00, e8390_base + EN0_ISR);
1127 ei_local->irqlock = 1;
1128
1129 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1130 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1131 ++nr_serviced < MAX_SERVICE)
1132 {
1133 if (!netif_running(dev) || (interrupts == 0xff)) {
1134 netif_warn(ei_local, intr, dev,
1135 "interrupt from stopped card\n");
1136 outb_p(interrupts, e8390_base + EN0_ISR);
1137 interrupts = 0;
1138 break;
1139 }
1140 handled = 1;
1141
1142 /* AX88190 bug fix. */
1143 outb_p(interrupts, e8390_base + EN0_ISR);
1144 for (i = 0; i < 10; i++) {
1145 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1146 break;
1147 outb_p(0, e8390_base + EN0_ISR);
1148 outb_p(interrupts, e8390_base + EN0_ISR);
1149 }
1150 if (interrupts & ENISR_OVER)
1151 ei_rx_overrun(dev);
1152 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1153 {
1154 /* Got a good (?) packet. */
1155 ei_receive(dev);
1156 }
1157 /* Push the next to-transmit packet through. */
1158 if (interrupts & ENISR_TX)
1159 ei_tx_intr(dev);
1160 else if (interrupts & ENISR_TX_ERR)
1161 ei_tx_err(dev);
1162
1163 if (interrupts & ENISR_COUNTERS)
1164 {
1165 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1166 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1167 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1168 }
1169 }
1170
1171 if (interrupts && (netif_msg_intr(ei_local)))
1172 {
1173 handled = 1;
1174 if (nr_serviced >= MAX_SERVICE)
1175 {
1176 /* 0xFF is valid for a card removal */
1177 if (interrupts != 0xFF)
1178 netdev_warn(dev,
1179 "Too much work at interrupt, status %#2.2x\n",
1180 interrupts);
1181 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1182 } else {
1183 netdev_warn(dev, "unknown interrupt %#2x\n",
1184 interrupts);
1185 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1186 }
1187 }
1188
1189 /* Turn 8390 interrupts back on. */
1190 ei_local->irqlock = 0;
1191 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1192
1193 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1194 return IRQ_RETVAL(handled);
1195}
1196
1197/**
1198 * ei_tx_err - handle transmitter error
1199 * @dev: network device which threw the exception
1200 *
1201 * A transmitter error has happened. Most likely excess collisions (which
1202 * is a fairly normal condition). If the error is one where the Tx will
1203 * have been aborted, we try and send another one right away, instead of
1204 * letting the failed packet sit and collect dust in the Tx buffer. This
1205 * is a much better solution as it avoids kernel based Tx timeouts, and
1206 * an unnecessary card reset.
1207 *
1208 * Called with lock held.
1209 */
1210
1211static void ei_tx_err(struct net_device *dev)
1212{
1213 long e8390_base = dev->base_addr;
1214 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1215 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1216
1217#ifdef VERBOSE_ERROR_DUMP
1218 netdev_dbg(dev, "transmitter error (%#2x):", txsr);
1219 if (txsr & ENTSR_ABT)
1220 pr_cont(" excess-collisions");
1221 if (txsr & ENTSR_ND)
1222 pr_cont(" non-deferral");
1223 if (txsr & ENTSR_CRS)
1224 pr_cont(" lost-carrier");
1225 if (txsr & ENTSR_FU)
1226 pr_cont(" FIFO-underrun");
1227 if (txsr & ENTSR_CDH)
1228 pr_cont(" lost-heartbeat");
1229 pr_cont("\n");
1230#endif
1231
1232 if (tx_was_aborted)
1233 ei_tx_intr(dev);
1234 else
1235 {
1236 dev->stats.tx_errors++;
1237 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1238 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1239 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1240 }
1241}
1242
1243/**
1244 * ei_tx_intr - transmit interrupt handler
1245 * @dev: network device for which tx intr is handled
1246 *
1247 * We have finished a transmit: check for errors and then trigger the next
1248 * packet to be sent. Called with lock held.
1249 */
1250
1251static void ei_tx_intr(struct net_device *dev)
1252{
1253 long e8390_base = dev->base_addr;
1254 struct ei_device *ei_local = netdev_priv(dev);
1255 int status = inb(e8390_base + EN0_TSR);
1256
1257 /*
1258 * There are two Tx buffers, see which one finished, and trigger
1259 * the send of another one if it exists.
1260 */
1261 ei_local->txqueue--;
1262
1263 if (ei_local->tx1 < 0)
1264 {
1265 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1266 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1267 ei_local->name, ei_local->lasttx,
1268 ei_local->tx1);
1269 ei_local->tx1 = 0;
1270 if (ei_local->tx2 > 0)
1271 {
1272 ei_local->txing = 1;
1273 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1274 netif_trans_update(dev);
1275 ei_local->tx2 = -1;
1276 ei_local->lasttx = 2;
1277 } else {
1278 ei_local->lasttx = 20;
1279 ei_local->txing = 0;
1280 }
1281 }
1282 else if (ei_local->tx2 < 0)
1283 {
1284 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1285 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1286 ei_local->name, ei_local->lasttx,
1287 ei_local->tx2);
1288 ei_local->tx2 = 0;
1289 if (ei_local->tx1 > 0)
1290 {
1291 ei_local->txing = 1;
1292 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1293 netif_trans_update(dev);
1294 ei_local->tx1 = -1;
1295 ei_local->lasttx = 1;
1296 } else {
1297 ei_local->lasttx = 10;
1298 ei_local->txing = 0;
1299 }
1300 }
1301// else
1302// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1303// ei_local->lasttx);
1304
1305 /* Minimize Tx latency: update the statistics after we restart TXing. */
1306 if (status & ENTSR_COL)
1307 dev->stats.collisions++;
1308 if (status & ENTSR_PTX)
1309 dev->stats.tx_packets++;
1310 else
1311 {
1312 dev->stats.tx_errors++;
1313 if (status & ENTSR_ABT)
1314 {
1315 dev->stats.tx_aborted_errors++;
1316 dev->stats.collisions += 16;
1317 }
1318 if (status & ENTSR_CRS)
1319 dev->stats.tx_carrier_errors++;
1320 if (status & ENTSR_FU)
1321 dev->stats.tx_fifo_errors++;
1322 if (status & ENTSR_CDH)
1323 dev->stats.tx_heartbeat_errors++;
1324 if (status & ENTSR_OWC)
1325 dev->stats.tx_window_errors++;
1326 }
1327 netif_wake_queue(dev);
1328}
1329
1330/**
1331 * ei_receive - receive some packets
1332 * @dev: network device with which receive will be run
1333 *
1334 * We have a good packet(s), get it/them out of the buffers.
1335 * Called with lock held.
1336 */
1337
1338static void ei_receive(struct net_device *dev)
1339{
1340 long e8390_base = dev->base_addr;
1341 struct ei_device *ei_local = netdev_priv(dev);
1342 unsigned char rxing_page, this_frame, next_frame;
1343 unsigned short current_offset;
1344 int rx_pkt_count = 0;
1345 struct e8390_pkt_hdr rx_frame;
1346
1347 while (++rx_pkt_count < 10)
1348 {
1349 int pkt_len, pkt_stat;
1350
1351 /* Get the rx page (incoming packet pointer). */
1352 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1353
1354 /* Remove one frame from the ring. Boundary is always a page behind. */
1355 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1356 if (this_frame >= ei_local->stop_page)
1357 this_frame = ei_local->rx_start_page;
1358
1359 /* Someday we'll omit the previous, iff we never get this message.
1360 (There is at least one clone claimed to have a problem.)
1361
1362 Keep quiet if it looks like a card removal. One problem here
1363 is that some clones crash in roughly the same way.
1364 */
1365 if ((netif_msg_rx_err(ei_local)) &&
1366 this_frame != ei_local->current_page &&
1367 (this_frame != 0x0 || rxing_page != 0xFF))
1368 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1369 this_frame, ei_local->current_page);
1370
1371 if (this_frame == rxing_page) /* Read all the frames? */
1372 break; /* Done for now */
1373
1374 current_offset = this_frame << 8;
1375 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1376
1377 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1378 pkt_stat = rx_frame.status;
1379
1380 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1381
1382 if (pkt_len < 60 || pkt_len > 1518)
1383 {
1384 netif_err(ei_local, rx_err, dev,
1385 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1386 rx_frame.count, rx_frame.status,
1387 rx_frame.next);
1388 dev->stats.rx_errors++;
1389 dev->stats.rx_length_errors++;
1390 }
1391 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1392 {
1393 struct sk_buff *skb;
1394
1395 skb = netdev_alloc_skb(dev, pkt_len + 2);
1396 if (skb == NULL)
1397 {
1398 netif_err(ei_local, rx_err, dev,
1399 "Couldn't allocate a sk_buff of size %d\n",
1400 pkt_len);
1401 dev->stats.rx_dropped++;
1402 break;
1403 }
1404 else
1405 {
1406 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1407 skb_put(skb, pkt_len); /* Make room */
1408 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1409 skb->protocol=eth_type_trans(skb,dev);
1410 netif_rx(skb);
1411 dev->stats.rx_packets++;
1412 dev->stats.rx_bytes += pkt_len;
1413 if (pkt_stat & ENRSR_PHY)
1414 dev->stats.multicast++;
1415 }
1416 }
1417 else
1418 {
1419 netif_err(ei_local, rx_err, dev,
1420 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1421 rx_frame.status, rx_frame.next,
1422 rx_frame.count);
1423 dev->stats.rx_errors++;
1424 /* NB: The NIC counts CRC, frame and missed errors. */
1425 if (pkt_stat & ENRSR_FO)
1426 dev->stats.rx_fifo_errors++;
1427 }
1428 next_frame = rx_frame.next;
1429
1430 /* This _should_ never happen: it's here for avoiding bad clones. */
1431 if (next_frame >= ei_local->stop_page) {
1432 netdev_info(dev, "next frame inconsistency, %#2x\n",
1433 next_frame);
1434 next_frame = ei_local->rx_start_page;
1435 }
1436 ei_local->current_page = next_frame;
1437 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1438 }
1439}
1440
1441/**
1442 * ei_rx_overrun - handle receiver overrun
1443 * @dev: network device which threw exception
1444 *
1445 * We have a receiver overrun: we have to kick the 8390 to get it started
1446 * again. Problem is that you have to kick it exactly as NS prescribes in
1447 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1448 * This includes causing "the NIC to defer indefinitely when it is stopped
1449 * on a busy network." Ugh.
1450 * Called with lock held. Don't call this with the interrupts off or your
1451 * computer will hate you - it takes 10ms or so.
1452 */
1453
1454static void ei_rx_overrun(struct net_device *dev)
1455{
1456 struct axnet_dev *info = PRIV(dev);
1457 long e8390_base = dev->base_addr;
1458 unsigned char was_txing, must_resend = 0;
1459 struct ei_device *ei_local = netdev_priv(dev);
1460
1461 /*
1462 * Record whether a Tx was in progress and then issue the
1463 * stop command.
1464 */
1465 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1466 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1467
1468 netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
1469 dev->stats.rx_over_errors++;
1470
1471 /*
1472 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1473 * We wait at least 2ms.
1474 */
1475
1476 mdelay(2);
1477
1478 /*
1479 * Reset RBCR[01] back to zero as per magic incantation.
1480 */
1481 outb_p(0x00, e8390_base+EN0_RCNTLO);
1482 outb_p(0x00, e8390_base+EN0_RCNTHI);
1483
1484 /*
1485 * See if any Tx was interrupted or not. According to NS, this
1486 * step is vital, and skipping it will cause no end of havoc.
1487 */
1488
1489 if (was_txing)
1490 {
1491 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1492 if (!tx_completed)
1493 must_resend = 1;
1494 }
1495
1496 /*
1497 * Have to enter loopback mode and then restart the NIC before
1498 * you are allowed to slurp packets up off the ring.
1499 */
1500 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1501 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1502
1503 /*
1504 * Clear the Rx ring of all the debris, and ack the interrupt.
1505 */
1506 ei_receive(dev);
1507
1508 /*
1509 * Leave loopback mode, and resend any packet that got stopped.
1510 */
1511 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1512 if (must_resend)
1513 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1514}
1515
1516/*
1517 * Collect the stats. This is called unlocked and from several contexts.
1518 */
1519
1520static struct net_device_stats *get_stats(struct net_device *dev)
1521{
1522 long ioaddr = dev->base_addr;
1523 struct ei_device *ei_local = netdev_priv(dev);
1524 unsigned long flags;
1525
1526 /* If the card is stopped, just return the present stats. */
1527 if (!netif_running(dev))
1528 return &dev->stats;
1529
1530 spin_lock_irqsave(&ei_local->page_lock,flags);
1531 /* Read the counter registers, assuming we are in page 0. */
1532 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1533 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1534 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1535 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1536
1537 return &dev->stats;
1538}
1539
1540/*
1541 * Form the 64 bit 8390 multicast table from the linked list of addresses
1542 * associated with this dev structure.
1543 */
1544
1545static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1546{
1547 struct netdev_hw_addr *ha;
1548 u32 crc;
1549
1550 netdev_for_each_mc_addr(ha, dev) {
1551 crc = ether_crc(ETH_ALEN, ha->addr);
1552 /*
1553 * The 8390 uses the 6 most significant bits of the
1554 * CRC to index the multicast table.
1555 */
1556 bits[crc>>29] |= (1<<((crc>>26)&7));
1557 }
1558}
1559
1560/**
1561 * do_set_multicast_list - set/clear multicast filter
1562 * @dev: net device for which multicast filter is adjusted
1563 *
1564 * Set or clear the multicast filter for this adaptor.
1565 * Must be called with lock held.
1566 */
1567
1568static void do_set_multicast_list(struct net_device *dev)
1569{
1570 long e8390_base = dev->base_addr;
1571 int i;
1572 struct ei_device *ei_local = netdev_priv(dev);
1573
1574 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1575 memset(ei_local->mcfilter, 0, 8);
1576 if (!netdev_mc_empty(dev))
1577 make_mc_bits(ei_local->mcfilter, dev);
1578 } else {
1579 /* set to accept-all */
1580 memset(ei_local->mcfilter, 0xFF, 8);
1581 }
1582
1583 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1584 for(i = 0; i < 8; i++)
1585 {
1586 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1587 }
1588 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1589
1590 if(dev->flags&IFF_PROMISC)
1591 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1592 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1593 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1594 else
1595 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1596
1597 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1598}
1599
1600/*
1601 * Called without lock held. This is invoked from user context and may
1602 * be parallel to just about everything else. Its also fairly quick and
1603 * not called too often. Must protect against both bh and irq users
1604 */
1605
1606static void set_multicast_list(struct net_device *dev)
1607{
1608 unsigned long flags;
1609
1610 spin_lock_irqsave(&dev_lock(dev), flags);
1611 do_set_multicast_list(dev);
1612 spin_unlock_irqrestore(&dev_lock(dev), flags);
1613}
1614
1615/* This page of functions should be 8390 generic */
1616/* Follow National Semi's recommendations for initializing the "NIC". */
1617
1618/**
1619 * AX88190_init - initialize 8390 hardware
1620 * @dev: network device to initialize
1621 * @startp: boolean. non-zero value to initiate chip processing
1622 *
1623 * Must be called with lock held.
1624 */
1625
1626static void AX88190_init(struct net_device *dev, int startp)
1627{
1628 struct axnet_dev *info = PRIV(dev);
1629 long e8390_base = dev->base_addr;
1630 struct ei_device *ei_local = netdev_priv(dev);
1631 int i;
1632 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1633
1634 if(sizeof(struct e8390_pkt_hdr)!=4)
1635 panic("8390.c: header struct mispacked\n");
1636 /* Follow National Semi's recommendations for initing the DP83902. */
1637 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1638 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1639 /* Clear the remote byte count registers. */
1640 outb_p(0x00, e8390_base + EN0_RCNTLO);
1641 outb_p(0x00, e8390_base + EN0_RCNTHI);
1642 /* Set to monitor and loopback mode -- this is vital!. */
1643 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1644 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1645 /* Set the transmit page and receive ring. */
1646 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1647 ei_local->tx1 = ei_local->tx2 = 0;
1648 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1649 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1650 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1651 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1652 /* Clear the pending interrupts and mask. */
1653 outb_p(0xFF, e8390_base + EN0_ISR);
1654 outb_p(0x00, e8390_base + EN0_IMR);
1655
1656 /* Copy the station address into the DS8390 registers. */
1657
1658 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1659 for(i = 0; i < 6; i++)
1660 {
1661 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1662 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1663 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1664 }
1665
1666 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1667 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1668
1669 netif_start_queue(dev);
1670 ei_local->tx1 = ei_local->tx2 = 0;
1671 ei_local->txing = 0;
1672
1673 if (info->flags & IS_AX88790) /* select Internal PHY */
1674 outb(0x10, e8390_base + AXNET_GPIO);
1675
1676 if (startp)
1677 {
1678 outb_p(0xff, e8390_base + EN0_ISR);
1679 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1680 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1681 outb_p(E8390_TXCONFIG | info->duplex_flag,
1682 e8390_base + EN0_TXCR); /* xmit on. */
1683 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1684 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1685 do_set_multicast_list(dev); /* (re)load the mcast table */
1686 }
1687}
1688
1689/* Trigger a transmit start, assuming the length is valid.
1690 Always called with the page lock held */
1691
1692static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1693 int start_page)
1694{
1695 long e8390_base = dev->base_addr;
1696 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1697
1698 if (inb_p(e8390_base) & E8390_TRANS)
1699 {
1700 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1701 return;
1702 }
1703 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1704 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1705 outb_p(start_page, e8390_base + EN0_TPSR);
1706 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1707}
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/ptrace.h>
33#include <linux/string.h>
34#include <linux/timer.h>
35#include <linux/delay.h>
36#include <linux/spinlock.h>
37#include <linux/netdevice.h>
38#include <linux/etherdevice.h>
39#include <linux/crc32.h>
40#include <linux/mii.h>
41#include "8390.h"
42
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/byteorder.h>
50#include <asm/uaccess.h>
51
52#define AXNET_CMD 0x00
53#define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
54#define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
55#define AXNET_MII_EEP 0x14 /* Offset of MII access port */
56#define AXNET_TEST 0x15 /* Offset of TEST Register port */
57#define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
58
59#define AXNET_START_PG 0x40 /* First page of TX buffer */
60#define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
61
62#define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
63
64#define IS_AX88190 0x0001
65#define IS_AX88790 0x0002
66
67/*====================================================================*/
68
69/* Module parameters */
70
71MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
72MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
73MODULE_LICENSE("GPL");
74
75
76/*====================================================================*/
77
78static int axnet_config(struct pcmcia_device *link);
79static void axnet_release(struct pcmcia_device *link);
80static int axnet_open(struct net_device *dev);
81static int axnet_close(struct net_device *dev);
82static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
83static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
84 struct net_device *dev);
85static struct net_device_stats *get_stats(struct net_device *dev);
86static void set_multicast_list(struct net_device *dev);
87static void axnet_tx_timeout(struct net_device *dev);
88static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
89static void ei_watchdog(u_long arg);
90static void axnet_reset_8390(struct net_device *dev);
91
92static int mdio_read(unsigned int addr, int phy_id, int loc);
93static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
94
95static void get_8390_hdr(struct net_device *,
96 struct e8390_pkt_hdr *, int);
97static void block_input(struct net_device *dev, int count,
98 struct sk_buff *skb, int ring_offset);
99static void block_output(struct net_device *dev, int count,
100 const u_char *buf, const int start_page);
101
102static void axnet_detach(struct pcmcia_device *p_dev);
103
104static void AX88190_init(struct net_device *dev, int startp);
105static int ax_open(struct net_device *dev);
106static int ax_close(struct net_device *dev);
107static irqreturn_t ax_interrupt(int irq, void *dev_id);
108
109/*====================================================================*/
110
111typedef struct axnet_dev_t {
112 struct pcmcia_device *p_dev;
113 caddr_t base;
114 struct timer_list watchdog;
115 int stale, fast_poll;
116 u_short link_status;
117 u_char duplex_flag;
118 int phy_id;
119 int flags;
120 int active_low;
121} axnet_dev_t;
122
123static inline axnet_dev_t *PRIV(struct net_device *dev)
124{
125 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
126 return p;
127}
128
129static const struct net_device_ops axnet_netdev_ops = {
130 .ndo_open = axnet_open,
131 .ndo_stop = axnet_close,
132 .ndo_do_ioctl = axnet_ioctl,
133 .ndo_start_xmit = axnet_start_xmit,
134 .ndo_tx_timeout = axnet_tx_timeout,
135 .ndo_get_stats = get_stats,
136 .ndo_set_rx_mode = set_multicast_list,
137 .ndo_change_mtu = eth_change_mtu,
138 .ndo_set_mac_address = eth_mac_addr,
139 .ndo_validate_addr = eth_validate_addr,
140};
141
142static int axnet_probe(struct pcmcia_device *link)
143{
144 axnet_dev_t *info;
145 struct net_device *dev;
146 struct ei_device *ei_local;
147
148 dev_dbg(&link->dev, "axnet_attach()\n");
149
150 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
151 if (!dev)
152 return -ENOMEM;
153
154 ei_local = netdev_priv(dev);
155 spin_lock_init(&ei_local->page_lock);
156
157 info = PRIV(dev);
158 info->p_dev = link;
159 link->priv = dev;
160 link->config_flags |= CONF_ENABLE_IRQ;
161
162 dev->netdev_ops = &axnet_netdev_ops;
163
164 dev->watchdog_timeo = TX_TIMEOUT;
165
166 return axnet_config(link);
167} /* axnet_attach */
168
169static void axnet_detach(struct pcmcia_device *link)
170{
171 struct net_device *dev = link->priv;
172
173 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
174
175 unregister_netdev(dev);
176
177 axnet_release(link);
178
179 free_netdev(dev);
180} /* axnet_detach */
181
182/*======================================================================
183
184 This probes for a card's hardware address by reading the PROM.
185
186======================================================================*/
187
188static int get_prom(struct pcmcia_device *link)
189{
190 struct net_device *dev = link->priv;
191 unsigned int ioaddr = dev->base_addr;
192 int i, j;
193
194 /* This is based on drivers/net/ethernet/8390/ne.c */
195 struct {
196 u_char value, offset;
197 } program_seq[] = {
198 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
199 {0x01, EN0_DCFG}, /* Set word-wide access. */
200 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
201 {0x00, EN0_RCNTHI},
202 {0x00, EN0_IMR}, /* Mask completion irq. */
203 {0xFF, EN0_ISR},
204 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
205 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
206 {0x10, EN0_RCNTLO},
207 {0x00, EN0_RCNTHI},
208 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
209 {0x04, EN0_RSARHI},
210 {E8390_RREAD+E8390_START, E8390_CMD},
211 };
212
213 /* Not much of a test, but the alternatives are messy */
214 if (link->config_base != 0x03c0)
215 return 0;
216
217 axnet_reset_8390(dev);
218 mdelay(10);
219
220 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
221 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
222
223 for (i = 0; i < 6; i += 2) {
224 j = inw(ioaddr + AXNET_DATAPORT);
225 dev->dev_addr[i] = j & 0xff;
226 dev->dev_addr[i+1] = j >> 8;
227 }
228 return 1;
229} /* get_prom */
230
231static int try_io_port(struct pcmcia_device *link)
232{
233 int j, ret;
234 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
235 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
236 if (link->resource[0]->end == 32) {
237 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
238 /* for master/slave multifunction cards */
239 if (link->resource[1]->end > 0)
240 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
241 } else {
242 /* This should be two 16-port windows */
243 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
244 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
245 }
246 if (link->resource[0]->start == 0) {
247 for (j = 0; j < 0x400; j += 0x20) {
248 link->resource[0]->start = j ^ 0x300;
249 link->resource[1]->start = (j ^ 0x300) + 0x10;
250 link->io_lines = 16;
251 ret = pcmcia_request_io(link);
252 if (ret == 0)
253 return ret;
254 }
255 return ret;
256 } else {
257 return pcmcia_request_io(link);
258 }
259}
260
261static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
262{
263 if (p_dev->config_index == 0)
264 return -EINVAL;
265
266 p_dev->config_index = 0x05;
267 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
268 return -ENODEV;
269
270 return try_io_port(p_dev);
271}
272
273static int axnet_config(struct pcmcia_device *link)
274{
275 struct net_device *dev = link->priv;
276 axnet_dev_t *info = PRIV(dev);
277 int i, j, j2, ret;
278
279 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
280
281 /* don't trust the CIS on this; Linksys got it wrong */
282 link->config_regs = 0x63;
283 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
284 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
285 if (ret != 0)
286 goto failed;
287
288 if (!link->irq)
289 goto failed;
290
291 if (resource_size(link->resource[1]) == 8)
292 link->config_flags |= CONF_ENABLE_SPKR;
293
294 ret = pcmcia_enable_device(link);
295 if (ret)
296 goto failed;
297
298 dev->irq = link->irq;
299 dev->base_addr = link->resource[0]->start;
300
301 if (!get_prom(link)) {
302 pr_notice("this is not an AX88190 card!\n");
303 pr_notice("use pcnet_cs instead.\n");
304 goto failed;
305 }
306
307 ei_status.name = "AX88190";
308 ei_status.word16 = 1;
309 ei_status.tx_start_page = AXNET_START_PG;
310 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
311 ei_status.stop_page = AXNET_STOP_PG;
312 ei_status.reset_8390 = axnet_reset_8390;
313 ei_status.get_8390_hdr = get_8390_hdr;
314 ei_status.block_input = block_input;
315 ei_status.block_output = block_output;
316
317 if (inb(dev->base_addr + AXNET_TEST) != 0)
318 info->flags |= IS_AX88790;
319 else
320 info->flags |= IS_AX88190;
321
322 if (info->flags & IS_AX88790)
323 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
324
325 info->active_low = 0;
326
327 for (i = 0; i < 32; i++) {
328 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
329 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
330 if (j == j2) continue;
331 if ((j != 0) && (j != 0xffff)) break;
332 }
333
334 if (i == 32) {
335 /* Maybe PHY is in power down mode. (PPD_SET = 1)
336 Bit 2 of CCSR is active low. */
337 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
338 for (i = 0; i < 32; i++) {
339 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
340 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
341 if (j == j2) continue;
342 if ((j != 0) && (j != 0xffff)) {
343 info->active_low = 1;
344 break;
345 }
346 }
347 }
348
349 info->phy_id = (i < 32) ? i : -1;
350 SET_NETDEV_DEV(dev, &link->dev);
351
352 if (register_netdev(dev) != 0) {
353 pr_notice("register_netdev() failed\n");
354 goto failed;
355 }
356
357 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
358 ((info->flags & IS_AX88790) ? 7 : 1),
359 dev->base_addr, dev->irq, dev->dev_addr);
360 if (info->phy_id != -1) {
361 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
362 info->phy_id, j);
363 } else {
364 netdev_notice(dev, " No MII transceivers found!\n");
365 }
366 return 0;
367
368failed:
369 axnet_release(link);
370 return -ENODEV;
371} /* axnet_config */
372
373static void axnet_release(struct pcmcia_device *link)
374{
375 pcmcia_disable_device(link);
376}
377
378static int axnet_suspend(struct pcmcia_device *link)
379{
380 struct net_device *dev = link->priv;
381
382 if (link->open)
383 netif_device_detach(dev);
384
385 return 0;
386}
387
388static int axnet_resume(struct pcmcia_device *link)
389{
390 struct net_device *dev = link->priv;
391 axnet_dev_t *info = PRIV(dev);
392
393 if (link->open) {
394 if (info->active_low == 1)
395 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
396
397 axnet_reset_8390(dev);
398 AX88190_init(dev, 1);
399 netif_device_attach(dev);
400 }
401
402 return 0;
403}
404
405
406/*======================================================================
407
408 MII interface support
409
410======================================================================*/
411
412#define MDIO_SHIFT_CLK 0x01
413#define MDIO_DATA_WRITE0 0x00
414#define MDIO_DATA_WRITE1 0x08
415#define MDIO_DATA_READ 0x04
416#define MDIO_MASK 0x0f
417#define MDIO_ENB_IN 0x02
418
419static void mdio_sync(unsigned int addr)
420{
421 int bits;
422 for (bits = 0; bits < 32; bits++) {
423 outb_p(MDIO_DATA_WRITE1, addr);
424 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
425 }
426}
427
428static int mdio_read(unsigned int addr, int phy_id, int loc)
429{
430 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
431 int i, retval = 0;
432
433 mdio_sync(addr);
434 for (i = 14; i >= 0; i--) {
435 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
436 outb_p(dat, addr);
437 outb_p(dat | MDIO_SHIFT_CLK, addr);
438 }
439 for (i = 19; i > 0; i--) {
440 outb_p(MDIO_ENB_IN, addr);
441 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
442 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
443 }
444 return (retval>>1) & 0xffff;
445}
446
447static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
448{
449 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
450 int i;
451
452 mdio_sync(addr);
453 for (i = 31; i >= 0; i--) {
454 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
455 outb_p(dat, addr);
456 outb_p(dat | MDIO_SHIFT_CLK, addr);
457 }
458 for (i = 1; i >= 0; i--) {
459 outb_p(MDIO_ENB_IN, addr);
460 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
461 }
462}
463
464/*====================================================================*/
465
466static int axnet_open(struct net_device *dev)
467{
468 int ret;
469 axnet_dev_t *info = PRIV(dev);
470 struct pcmcia_device *link = info->p_dev;
471 unsigned int nic_base = dev->base_addr;
472
473 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
474
475 if (!pcmcia_dev_present(link))
476 return -ENODEV;
477
478 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
479 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
480 if (ret)
481 return ret;
482
483 link->open++;
484
485 info->link_status = 0x00;
486 init_timer(&info->watchdog);
487 info->watchdog.function = ei_watchdog;
488 info->watchdog.data = (u_long)dev;
489 info->watchdog.expires = jiffies + HZ;
490 add_timer(&info->watchdog);
491
492 return ax_open(dev);
493} /* axnet_open */
494
495/*====================================================================*/
496
497static int axnet_close(struct net_device *dev)
498{
499 axnet_dev_t *info = PRIV(dev);
500 struct pcmcia_device *link = info->p_dev;
501
502 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
503
504 ax_close(dev);
505 free_irq(dev->irq, dev);
506
507 link->open--;
508 netif_stop_queue(dev);
509 del_timer_sync(&info->watchdog);
510
511 return 0;
512} /* axnet_close */
513
514/*======================================================================
515
516 Hard reset the card. This used to pause for the same period that
517 a 8390 reset command required, but that shouldn't be necessary.
518
519======================================================================*/
520
521static void axnet_reset_8390(struct net_device *dev)
522{
523 unsigned int nic_base = dev->base_addr;
524 int i;
525
526 ei_status.txing = ei_status.dmaing = 0;
527
528 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
529
530 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
531
532 for (i = 0; i < 100; i++) {
533 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
534 break;
535 udelay(100);
536 }
537 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
538
539 if (i == 100)
540 netdev_err(dev, "axnet_reset_8390() did not complete\n");
541
542} /* axnet_reset_8390 */
543
544/*====================================================================*/
545
546static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
547{
548 struct net_device *dev = dev_id;
549 PRIV(dev)->stale = 0;
550 return ax_interrupt(irq, dev_id);
551}
552
553static void ei_watchdog(u_long arg)
554{
555 struct net_device *dev = (struct net_device *)(arg);
556 axnet_dev_t *info = PRIV(dev);
557 unsigned int nic_base = dev->base_addr;
558 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
559 u_short link;
560
561 if (!netif_device_present(dev)) goto reschedule;
562
563 /* Check for pending interrupt with expired latency timer: with
564 this, we can limp along even if the interrupt is blocked */
565 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
566 if (!info->fast_poll)
567 netdev_info(dev, "interrupt(s) dropped!\n");
568 ei_irq_wrapper(dev->irq, dev);
569 info->fast_poll = HZ;
570 }
571 if (info->fast_poll) {
572 info->fast_poll--;
573 info->watchdog.expires = jiffies + 1;
574 add_timer(&info->watchdog);
575 return;
576 }
577
578 if (info->phy_id < 0)
579 goto reschedule;
580 link = mdio_read(mii_addr, info->phy_id, 1);
581 if (!link || (link == 0xffff)) {
582 netdev_info(dev, "MII is missing!\n");
583 info->phy_id = -1;
584 goto reschedule;
585 }
586
587 link &= 0x0004;
588 if (link != info->link_status) {
589 u_short p = mdio_read(mii_addr, info->phy_id, 5);
590 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
591 if (link) {
592 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
593 if (p)
594 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
595 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
596 else
597 netdev_info(dev, "link partner did not autonegotiate\n");
598 AX88190_init(dev, 1);
599 }
600 info->link_status = link;
601 }
602
603reschedule:
604 info->watchdog.expires = jiffies + HZ;
605 add_timer(&info->watchdog);
606}
607
608/*====================================================================*/
609
610static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
611{
612 axnet_dev_t *info = PRIV(dev);
613 struct mii_ioctl_data *data = if_mii(rq);
614 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
615 switch (cmd) {
616 case SIOCGMIIPHY:
617 data->phy_id = info->phy_id;
618 case SIOCGMIIREG: /* Read MII PHY register. */
619 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
620 return 0;
621 case SIOCSMIIREG: /* Write MII PHY register. */
622 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
623 return 0;
624 }
625 return -EOPNOTSUPP;
626}
627
628/*====================================================================*/
629
630static void get_8390_hdr(struct net_device *dev,
631 struct e8390_pkt_hdr *hdr,
632 int ring_page)
633{
634 unsigned int nic_base = dev->base_addr;
635
636 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
637 outb_p(ring_page, nic_base + EN0_RSARHI);
638 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
639
640 insw(nic_base + AXNET_DATAPORT, hdr,
641 sizeof(struct e8390_pkt_hdr)>>1);
642 /* Fix for big endian systems */
643 hdr->count = le16_to_cpu(hdr->count);
644
645}
646
647/*====================================================================*/
648
649static void block_input(struct net_device *dev, int count,
650 struct sk_buff *skb, int ring_offset)
651{
652 unsigned int nic_base = dev->base_addr;
653 int xfer_count = count;
654 char *buf = skb->data;
655
656 if ((ei_debug > 4) && (count != 4))
657 pr_debug("%s: [bi=%d]\n", dev->name, count+4);
658 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
659 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
660 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
661
662 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
663 if (count & 0x01)
664 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
665
666}
667
668/*====================================================================*/
669
670static void block_output(struct net_device *dev, int count,
671 const u_char *buf, const int start_page)
672{
673 unsigned int nic_base = dev->base_addr;
674
675 pr_debug("%s: [bo=%d]\n", dev->name, count);
676
677 /* Round the count up for word writes. Do we need to do this?
678 What effect will an odd byte count have on the 8390?
679 I should check someday. */
680 if (count & 0x01)
681 count++;
682
683 outb_p(0x00, nic_base + EN0_RSARLO);
684 outb_p(start_page, nic_base + EN0_RSARHI);
685 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
686 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
687}
688
689static const struct pcmcia_device_id axnet_ids[] = {
690 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
691 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
692 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
693 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
694 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
695 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
696 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
697 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
698 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
699 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
700 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
701 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
702 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
703 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
704 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
705 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
706 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
707 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
708 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
709 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
710 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
711 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
712 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
713 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
714 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
715 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
716 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
717 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
718 PCMCIA_DEVICE_NULL,
719};
720MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
721
722static struct pcmcia_driver axnet_cs_driver = {
723 .owner = THIS_MODULE,
724 .name = "axnet_cs",
725 .probe = axnet_probe,
726 .remove = axnet_detach,
727 .id_table = axnet_ids,
728 .suspend = axnet_suspend,
729 .resume = axnet_resume,
730};
731
732static int __init init_axnet_cs(void)
733{
734 return pcmcia_register_driver(&axnet_cs_driver);
735}
736
737static void __exit exit_axnet_cs(void)
738{
739 pcmcia_unregister_driver(&axnet_cs_driver);
740}
741
742module_init(init_axnet_cs);
743module_exit(exit_axnet_cs);
744
745/*====================================================================*/
746
747/* 8390.c: A general NS8390 ethernet driver core for linux. */
748/*
749 Written 1992-94 by Donald Becker.
750
751 Copyright 1993 United States Government as represented by the
752 Director, National Security Agency.
753
754 This software may be used and distributed according to the terms
755 of the GNU General Public License, incorporated herein by reference.
756
757 The author may be reached as becker@scyld.com, or C/O
758 Scyld Computing Corporation
759 410 Severn Ave., Suite 210
760 Annapolis MD 21403
761
762 This is the chip-specific code for many 8390-based ethernet adaptors.
763 This is not a complete driver, it must be combined with board-specific
764 code such as ne.c, wd.c, 3c503.c, etc.
765
766 Seeing how at least eight drivers use this code, (not counting the
767 PCMCIA ones either) it is easy to break some card by what seems like
768 a simple innocent change. Please contact me or Donald if you think
769 you have found something that needs changing. -- PG
770
771 Changelog:
772
773 Paul Gortmaker : remove set_bit lock, other cleanups.
774 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
775 ei_block_input() for eth_io_copy_and_sum().
776 Paul Gortmaker : exchange static int ei_pingpong for a #define,
777 also add better Tx error handling.
778 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
779 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
780 Paul Gortmaker : tweak ANK's above multicast changes a bit.
781 Paul Gortmaker : update packet statistics for v2.1.x
782 Alan Cox : support arbitrary stupid port mappings on the
783 68K Macintosh. Support >16bit I/O spaces
784 Paul Gortmaker : add kmod support for auto-loading of the 8390
785 module by all drivers that require it.
786 Alan Cox : Spinlocking work, added 'BUG_83C690'
787 Paul Gortmaker : Separate out Tx timeout code from Tx path.
788
789 Sources:
790 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
791
792 */
793
794#include <linux/bitops.h>
795#include <asm/irq.h>
796#include <linux/fcntl.h>
797#include <linux/in.h>
798#include <linux/interrupt.h>
799
800#define BUG_83C690
801
802/* These are the operational function interfaces to board-specific
803 routines.
804 void reset_8390(struct net_device *dev)
805 Resets the board associated with DEV, including a hardware reset of
806 the 8390. This is only called when there is a transmit timeout, and
807 it is always followed by 8390_init().
808 void block_output(struct net_device *dev, int count, const unsigned char *buf,
809 int start_page)
810 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
811 "page" value uses the 8390's 256-byte pages.
812 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
813 Read the 4 byte, page aligned 8390 header. *If* there is a
814 subsequent read, it will be of the rest of the packet.
815 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
816 Read COUNT bytes from the packet buffer into the skb data area. Start
817 reading from RING_OFFSET, the address as the 8390 sees it. This will always
818 follow the read of the 8390 header.
819*/
820#define ei_reset_8390 (ei_local->reset_8390)
821#define ei_block_output (ei_local->block_output)
822#define ei_block_input (ei_local->block_input)
823#define ei_get_8390_hdr (ei_local->get_8390_hdr)
824
825/* use 0 for production, 1 for verification, >2 for debug */
826#ifndef ei_debug
827int ei_debug = 1;
828#endif
829
830/* Index to functions. */
831static void ei_tx_intr(struct net_device *dev);
832static void ei_tx_err(struct net_device *dev);
833static void ei_receive(struct net_device *dev);
834static void ei_rx_overrun(struct net_device *dev);
835
836/* Routines generic to NS8390-based boards. */
837static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
838 int start_page);
839static void do_set_multicast_list(struct net_device *dev);
840
841/*
842 * SMP and the 8390 setup.
843 *
844 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
845 * a page register that controls bank and packet buffer access. We guard
846 * this with ei_local->page_lock. Nobody should assume or set the page other
847 * than zero when the lock is not held. Lock holders must restore page 0
848 * before unlocking. Even pure readers must take the lock to protect in
849 * page 0.
850 *
851 * To make life difficult the chip can also be very slow. We therefore can't
852 * just use spinlocks. For the longer lockups we disable the irq the device
853 * sits on and hold the lock. We must hold the lock because there is a dual
854 * processor case other than interrupts (get stats/set multicast list in
855 * parallel with each other and transmit).
856 *
857 * Note: in theory we can just disable the irq on the card _but_ there is
858 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
859 * enter lock, take the queued irq. So we waddle instead of flying.
860 *
861 * Finally by special arrangement for the purpose of being generally
862 * annoying the transmit function is called bh atomic. That places
863 * restrictions on the user context callers as disable_irq won't save
864 * them.
865 */
866
867/**
868 * ax_open - Open/initialize the board.
869 * @dev: network device to initialize
870 *
871 * This routine goes all-out, setting everything
872 * up anew at each open, even though many of these registers should only
873 * need to be set once at boot.
874 */
875static int ax_open(struct net_device *dev)
876{
877 unsigned long flags;
878 struct ei_device *ei_local = netdev_priv(dev);
879
880 /*
881 * Grab the page lock so we own the register set, then call
882 * the init function.
883 */
884
885 spin_lock_irqsave(&ei_local->page_lock, flags);
886 AX88190_init(dev, 1);
887 /* Set the flag before we drop the lock, That way the IRQ arrives
888 after its set and we get no silly warnings */
889 netif_start_queue(dev);
890 spin_unlock_irqrestore(&ei_local->page_lock, flags);
891 ei_local->irqlock = 0;
892 return 0;
893}
894
895#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
896
897/**
898 * ax_close - shut down network device
899 * @dev: network device to close
900 *
901 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
902 */
903static int ax_close(struct net_device *dev)
904{
905 unsigned long flags;
906
907 /*
908 * Hold the page lock during close
909 */
910
911 spin_lock_irqsave(&dev_lock(dev), flags);
912 AX88190_init(dev, 0);
913 spin_unlock_irqrestore(&dev_lock(dev), flags);
914 netif_stop_queue(dev);
915 return 0;
916}
917
918/**
919 * axnet_tx_timeout - handle transmit time out condition
920 * @dev: network device which has apparently fallen asleep
921 *
922 * Called by kernel when device never acknowledges a transmit has
923 * completed (or failed) - i.e. never posted a Tx related interrupt.
924 */
925
926static void axnet_tx_timeout(struct net_device *dev)
927{
928 long e8390_base = dev->base_addr;
929 struct ei_device *ei_local = netdev_priv(dev);
930 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
931 unsigned long flags;
932
933 dev->stats.tx_errors++;
934
935 spin_lock_irqsave(&ei_local->page_lock, flags);
936 txsr = inb(e8390_base+EN0_TSR);
937 isr = inb(e8390_base+EN0_ISR);
938 spin_unlock_irqrestore(&ei_local->page_lock, flags);
939
940 netdev_printk(KERN_DEBUG, dev,
941 "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
942 (txsr & ENTSR_ABT) ? "excess collisions." :
943 (isr) ? "lost interrupt?" : "cable problem?",
944 txsr, isr, tickssofar);
945
946 if (!isr && !dev->stats.tx_packets)
947 {
948 /* The 8390 probably hasn't gotten on the cable yet. */
949 ei_local->interface_num ^= 1; /* Try a different xcvr. */
950 }
951
952 /* Ugly but a reset can be slow, yet must be protected */
953
954 spin_lock_irqsave(&ei_local->page_lock, flags);
955
956 /* Try to restart the card. Perhaps the user has fixed something. */
957 ei_reset_8390(dev);
958 AX88190_init(dev, 1);
959
960 spin_unlock_irqrestore(&ei_local->page_lock, flags);
961 netif_wake_queue(dev);
962}
963
964/**
965 * axnet_start_xmit - begin packet transmission
966 * @skb: packet to be sent
967 * @dev: network device to which packet is sent
968 *
969 * Sends a packet to an 8390 network device.
970 */
971
972static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
973 struct net_device *dev)
974{
975 long e8390_base = dev->base_addr;
976 struct ei_device *ei_local = netdev_priv(dev);
977 int length, send_length, output_page;
978 unsigned long flags;
979 u8 packet[ETH_ZLEN];
980
981 netif_stop_queue(dev);
982
983 length = skb->len;
984
985 /* Mask interrupts from the ethercard.
986 SMP: We have to grab the lock here otherwise the IRQ handler
987 on another CPU can flip window and race the IRQ mask set. We end
988 up trashing the mcast filter not disabling irqs if we don't lock */
989
990 spin_lock_irqsave(&ei_local->page_lock, flags);
991 outb_p(0x00, e8390_base + EN0_IMR);
992
993 /*
994 * Slow phase with lock held.
995 */
996
997 ei_local->irqlock = 1;
998
999 send_length = max(length, ETH_ZLEN);
1000
1001 /*
1002 * We have two Tx slots available for use. Find the first free
1003 * slot, and then perform some sanity checks. With two Tx bufs,
1004 * you get very close to transmitting back-to-back packets. With
1005 * only one Tx buf, the transmitter sits idle while you reload the
1006 * card, leaving a substantial gap between each transmitted packet.
1007 */
1008
1009 if (ei_local->tx1 == 0)
1010 {
1011 output_page = ei_local->tx_start_page;
1012 ei_local->tx1 = send_length;
1013 if (ei_debug && ei_local->tx2 > 0)
1014 netdev_printk(KERN_DEBUG, dev,
1015 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1016 ei_local->tx2, ei_local->lasttx,
1017 ei_local->txing);
1018 }
1019 else if (ei_local->tx2 == 0)
1020 {
1021 output_page = ei_local->tx_start_page + TX_PAGES/2;
1022 ei_local->tx2 = send_length;
1023 if (ei_debug && ei_local->tx1 > 0)
1024 netdev_printk(KERN_DEBUG, dev,
1025 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1026 ei_local->tx1, ei_local->lasttx,
1027 ei_local->txing);
1028 }
1029 else
1030 { /* We should never get here. */
1031 if (ei_debug)
1032 netdev_printk(KERN_DEBUG, dev,
1033 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1034 ei_local->tx1, ei_local->tx2,
1035 ei_local->lasttx);
1036 ei_local->irqlock = 0;
1037 netif_stop_queue(dev);
1038 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1039 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1040 dev->stats.tx_errors++;
1041 return NETDEV_TX_BUSY;
1042 }
1043
1044 /*
1045 * Okay, now upload the packet and trigger a send if the transmitter
1046 * isn't already sending. If it is busy, the interrupt handler will
1047 * trigger the send later, upon receiving a Tx done interrupt.
1048 */
1049
1050 if (length == skb->len)
1051 ei_block_output(dev, length, skb->data, output_page);
1052 else {
1053 memset(packet, 0, ETH_ZLEN);
1054 skb_copy_from_linear_data(skb, packet, skb->len);
1055 ei_block_output(dev, length, packet, output_page);
1056 }
1057
1058 if (! ei_local->txing)
1059 {
1060 ei_local->txing = 1;
1061 NS8390_trigger_send(dev, send_length, output_page);
1062 dev->trans_start = jiffies;
1063 if (output_page == ei_local->tx_start_page)
1064 {
1065 ei_local->tx1 = -1;
1066 ei_local->lasttx = -1;
1067 }
1068 else
1069 {
1070 ei_local->tx2 = -1;
1071 ei_local->lasttx = -2;
1072 }
1073 }
1074 else ei_local->txqueue++;
1075
1076 if (ei_local->tx1 && ei_local->tx2)
1077 netif_stop_queue(dev);
1078 else
1079 netif_start_queue(dev);
1080
1081 /* Turn 8390 interrupts back on. */
1082 ei_local->irqlock = 0;
1083 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1084
1085 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1086
1087 dev_kfree_skb (skb);
1088 dev->stats.tx_bytes += send_length;
1089
1090 return NETDEV_TX_OK;
1091}
1092
1093/**
1094 * ax_interrupt - handle the interrupts from an 8390
1095 * @irq: interrupt number
1096 * @dev_id: a pointer to the net_device
1097 *
1098 * Handle the ether interface interrupts. We pull packets from
1099 * the 8390 via the card specific functions and fire them at the networking
1100 * stack. We also handle transmit completions and wake the transmit path if
1101 * necessary. We also update the counters and do other housekeeping as
1102 * needed.
1103 */
1104
1105static irqreturn_t ax_interrupt(int irq, void *dev_id)
1106{
1107 struct net_device *dev = dev_id;
1108 long e8390_base;
1109 int interrupts, nr_serviced = 0, i;
1110 struct ei_device *ei_local;
1111 int handled = 0;
1112 unsigned long flags;
1113
1114 e8390_base = dev->base_addr;
1115 ei_local = netdev_priv(dev);
1116
1117 /*
1118 * Protect the irq test too.
1119 */
1120
1121 spin_lock_irqsave(&ei_local->page_lock, flags);
1122
1123 if (ei_local->irqlock) {
1124#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1125 const char *msg;
1126 /* The "irqlock" check is only for testing. */
1127 if (ei_local->irqlock)
1128 msg = "Interrupted while interrupts are masked!";
1129 else
1130 msg = "Reentering the interrupt handler!";
1131 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1132 msg,
1133 inb_p(e8390_base + EN0_ISR),
1134 inb_p(e8390_base + EN0_IMR));
1135#endif
1136 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1137 return IRQ_NONE;
1138 }
1139
1140 if (ei_debug > 3)
1141 netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n",
1142 inb_p(e8390_base + EN0_ISR));
1143
1144 outb_p(0x00, e8390_base + EN0_ISR);
1145 ei_local->irqlock = 1;
1146
1147 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1148 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1149 ++nr_serviced < MAX_SERVICE)
1150 {
1151 if (!netif_running(dev) || (interrupts == 0xff)) {
1152 if (ei_debug > 1)
1153 netdev_warn(dev,
1154 "interrupt from stopped card\n");
1155 outb_p(interrupts, e8390_base + EN0_ISR);
1156 interrupts = 0;
1157 break;
1158 }
1159 handled = 1;
1160
1161 /* AX88190 bug fix. */
1162 outb_p(interrupts, e8390_base + EN0_ISR);
1163 for (i = 0; i < 10; i++) {
1164 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1165 break;
1166 outb_p(0, e8390_base + EN0_ISR);
1167 outb_p(interrupts, e8390_base + EN0_ISR);
1168 }
1169 if (interrupts & ENISR_OVER)
1170 ei_rx_overrun(dev);
1171 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1172 {
1173 /* Got a good (?) packet. */
1174 ei_receive(dev);
1175 }
1176 /* Push the next to-transmit packet through. */
1177 if (interrupts & ENISR_TX)
1178 ei_tx_intr(dev);
1179 else if (interrupts & ENISR_TX_ERR)
1180 ei_tx_err(dev);
1181
1182 if (interrupts & ENISR_COUNTERS)
1183 {
1184 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1185 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1186 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1187 }
1188 }
1189
1190 if (interrupts && ei_debug > 3)
1191 {
1192 handled = 1;
1193 if (nr_serviced >= MAX_SERVICE)
1194 {
1195 /* 0xFF is valid for a card removal */
1196 if(interrupts!=0xFF)
1197 netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n",
1198 interrupts);
1199 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1200 } else {
1201 netdev_warn(dev, "unknown interrupt %#2x\n",
1202 interrupts);
1203 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1204 }
1205 }
1206
1207 /* Turn 8390 interrupts back on. */
1208 ei_local->irqlock = 0;
1209 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1210
1211 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1212 return IRQ_RETVAL(handled);
1213}
1214
1215/**
1216 * ei_tx_err - handle transmitter error
1217 * @dev: network device which threw the exception
1218 *
1219 * A transmitter error has happened. Most likely excess collisions (which
1220 * is a fairly normal condition). If the error is one where the Tx will
1221 * have been aborted, we try and send another one right away, instead of
1222 * letting the failed packet sit and collect dust in the Tx buffer. This
1223 * is a much better solution as it avoids kernel based Tx timeouts, and
1224 * an unnecessary card reset.
1225 *
1226 * Called with lock held.
1227 */
1228
1229static void ei_tx_err(struct net_device *dev)
1230{
1231 long e8390_base = dev->base_addr;
1232 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1233 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1234
1235#ifdef VERBOSE_ERROR_DUMP
1236 netdev_printk(KERN_DEBUG, dev,
1237 "transmitter error (%#2x):", txsr);
1238 if (txsr & ENTSR_ABT)
1239 pr_cont(" excess-collisions");
1240 if (txsr & ENTSR_ND)
1241 pr_cont(" non-deferral");
1242 if (txsr & ENTSR_CRS)
1243 pr_cont(" lost-carrier");
1244 if (txsr & ENTSR_FU)
1245 pr_cont(" FIFO-underrun");
1246 if (txsr & ENTSR_CDH)
1247 pr_cont(" lost-heartbeat");
1248 pr_cont("\n");
1249#endif
1250
1251 if (tx_was_aborted)
1252 ei_tx_intr(dev);
1253 else
1254 {
1255 dev->stats.tx_errors++;
1256 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1257 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1258 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1259 }
1260}
1261
1262/**
1263 * ei_tx_intr - transmit interrupt handler
1264 * @dev: network device for which tx intr is handled
1265 *
1266 * We have finished a transmit: check for errors and then trigger the next
1267 * packet to be sent. Called with lock held.
1268 */
1269
1270static void ei_tx_intr(struct net_device *dev)
1271{
1272 long e8390_base = dev->base_addr;
1273 struct ei_device *ei_local = netdev_priv(dev);
1274 int status = inb(e8390_base + EN0_TSR);
1275
1276 /*
1277 * There are two Tx buffers, see which one finished, and trigger
1278 * the send of another one if it exists.
1279 */
1280 ei_local->txqueue--;
1281
1282 if (ei_local->tx1 < 0)
1283 {
1284 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1285 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1286 ei_local->name, ei_local->lasttx,
1287 ei_local->tx1);
1288 ei_local->tx1 = 0;
1289 if (ei_local->tx2 > 0)
1290 {
1291 ei_local->txing = 1;
1292 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1293 dev->trans_start = jiffies;
1294 ei_local->tx2 = -1,
1295 ei_local->lasttx = 2;
1296 }
1297 else ei_local->lasttx = 20, ei_local->txing = 0;
1298 }
1299 else if (ei_local->tx2 < 0)
1300 {
1301 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1302 netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1303 ei_local->name, ei_local->lasttx,
1304 ei_local->tx2);
1305 ei_local->tx2 = 0;
1306 if (ei_local->tx1 > 0)
1307 {
1308 ei_local->txing = 1;
1309 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1310 dev->trans_start = jiffies;
1311 ei_local->tx1 = -1;
1312 ei_local->lasttx = 1;
1313 }
1314 else
1315 ei_local->lasttx = 10, ei_local->txing = 0;
1316 }
1317// else
1318// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1319// ei_local->lasttx);
1320
1321 /* Minimize Tx latency: update the statistics after we restart TXing. */
1322 if (status & ENTSR_COL)
1323 dev->stats.collisions++;
1324 if (status & ENTSR_PTX)
1325 dev->stats.tx_packets++;
1326 else
1327 {
1328 dev->stats.tx_errors++;
1329 if (status & ENTSR_ABT)
1330 {
1331 dev->stats.tx_aborted_errors++;
1332 dev->stats.collisions += 16;
1333 }
1334 if (status & ENTSR_CRS)
1335 dev->stats.tx_carrier_errors++;
1336 if (status & ENTSR_FU)
1337 dev->stats.tx_fifo_errors++;
1338 if (status & ENTSR_CDH)
1339 dev->stats.tx_heartbeat_errors++;
1340 if (status & ENTSR_OWC)
1341 dev->stats.tx_window_errors++;
1342 }
1343 netif_wake_queue(dev);
1344}
1345
1346/**
1347 * ei_receive - receive some packets
1348 * @dev: network device with which receive will be run
1349 *
1350 * We have a good packet(s), get it/them out of the buffers.
1351 * Called with lock held.
1352 */
1353
1354static void ei_receive(struct net_device *dev)
1355{
1356 long e8390_base = dev->base_addr;
1357 struct ei_device *ei_local = netdev_priv(dev);
1358 unsigned char rxing_page, this_frame, next_frame;
1359 unsigned short current_offset;
1360 int rx_pkt_count = 0;
1361 struct e8390_pkt_hdr rx_frame;
1362
1363 while (++rx_pkt_count < 10)
1364 {
1365 int pkt_len, pkt_stat;
1366
1367 /* Get the rx page (incoming packet pointer). */
1368 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1369
1370 /* Remove one frame from the ring. Boundary is always a page behind. */
1371 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1372 if (this_frame >= ei_local->stop_page)
1373 this_frame = ei_local->rx_start_page;
1374
1375 /* Someday we'll omit the previous, iff we never get this message.
1376 (There is at least one clone claimed to have a problem.)
1377
1378 Keep quiet if it looks like a card removal. One problem here
1379 is that some clones crash in roughly the same way.
1380 */
1381 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1382 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1383 this_frame, ei_local->current_page);
1384
1385 if (this_frame == rxing_page) /* Read all the frames? */
1386 break; /* Done for now */
1387
1388 current_offset = this_frame << 8;
1389 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1390
1391 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1392 pkt_stat = rx_frame.status;
1393
1394 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1395
1396 if (pkt_len < 60 || pkt_len > 1518)
1397 {
1398 if (ei_debug)
1399 netdev_printk(KERN_DEBUG, dev,
1400 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1401 rx_frame.count, rx_frame.status,
1402 rx_frame.next);
1403 dev->stats.rx_errors++;
1404 dev->stats.rx_length_errors++;
1405 }
1406 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1407 {
1408 struct sk_buff *skb;
1409
1410 skb = netdev_alloc_skb(dev, pkt_len + 2);
1411 if (skb == NULL)
1412 {
1413 if (ei_debug > 1)
1414 netdev_printk(KERN_DEBUG, dev,
1415 "Couldn't allocate a sk_buff of size %d\n",
1416 pkt_len);
1417 dev->stats.rx_dropped++;
1418 break;
1419 }
1420 else
1421 {
1422 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1423 skb_put(skb, pkt_len); /* Make room */
1424 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1425 skb->protocol=eth_type_trans(skb,dev);
1426 netif_rx(skb);
1427 dev->stats.rx_packets++;
1428 dev->stats.rx_bytes += pkt_len;
1429 if (pkt_stat & ENRSR_PHY)
1430 dev->stats.multicast++;
1431 }
1432 }
1433 else
1434 {
1435 if (ei_debug)
1436 netdev_printk(KERN_DEBUG, dev,
1437 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1438 rx_frame.status, rx_frame.next,
1439 rx_frame.count);
1440 dev->stats.rx_errors++;
1441 /* NB: The NIC counts CRC, frame and missed errors. */
1442 if (pkt_stat & ENRSR_FO)
1443 dev->stats.rx_fifo_errors++;
1444 }
1445 next_frame = rx_frame.next;
1446
1447 /* This _should_ never happen: it's here for avoiding bad clones. */
1448 if (next_frame >= ei_local->stop_page) {
1449 netdev_info(dev, "next frame inconsistency, %#2x\n",
1450 next_frame);
1451 next_frame = ei_local->rx_start_page;
1452 }
1453 ei_local->current_page = next_frame;
1454 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1455 }
1456}
1457
1458/**
1459 * ei_rx_overrun - handle receiver overrun
1460 * @dev: network device which threw exception
1461 *
1462 * We have a receiver overrun: we have to kick the 8390 to get it started
1463 * again. Problem is that you have to kick it exactly as NS prescribes in
1464 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1465 * This includes causing "the NIC to defer indefinitely when it is stopped
1466 * on a busy network." Ugh.
1467 * Called with lock held. Don't call this with the interrupts off or your
1468 * computer will hate you - it takes 10ms or so.
1469 */
1470
1471static void ei_rx_overrun(struct net_device *dev)
1472{
1473 axnet_dev_t *info = PRIV(dev);
1474 long e8390_base = dev->base_addr;
1475 unsigned char was_txing, must_resend = 0;
1476
1477 /*
1478 * Record whether a Tx was in progress and then issue the
1479 * stop command.
1480 */
1481 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1482 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1483
1484 if (ei_debug > 1)
1485 netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n");
1486 dev->stats.rx_over_errors++;
1487
1488 /*
1489 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1490 * We wait at least 2ms.
1491 */
1492
1493 mdelay(2);
1494
1495 /*
1496 * Reset RBCR[01] back to zero as per magic incantation.
1497 */
1498 outb_p(0x00, e8390_base+EN0_RCNTLO);
1499 outb_p(0x00, e8390_base+EN0_RCNTHI);
1500
1501 /*
1502 * See if any Tx was interrupted or not. According to NS, this
1503 * step is vital, and skipping it will cause no end of havoc.
1504 */
1505
1506 if (was_txing)
1507 {
1508 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1509 if (!tx_completed)
1510 must_resend = 1;
1511 }
1512
1513 /*
1514 * Have to enter loopback mode and then restart the NIC before
1515 * you are allowed to slurp packets up off the ring.
1516 */
1517 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1518 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1519
1520 /*
1521 * Clear the Rx ring of all the debris, and ack the interrupt.
1522 */
1523 ei_receive(dev);
1524
1525 /*
1526 * Leave loopback mode, and resend any packet that got stopped.
1527 */
1528 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1529 if (must_resend)
1530 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1531}
1532
1533/*
1534 * Collect the stats. This is called unlocked and from several contexts.
1535 */
1536
1537static struct net_device_stats *get_stats(struct net_device *dev)
1538{
1539 long ioaddr = dev->base_addr;
1540 struct ei_device *ei_local = netdev_priv(dev);
1541 unsigned long flags;
1542
1543 /* If the card is stopped, just return the present stats. */
1544 if (!netif_running(dev))
1545 return &dev->stats;
1546
1547 spin_lock_irqsave(&ei_local->page_lock,flags);
1548 /* Read the counter registers, assuming we are in page 0. */
1549 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1550 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1551 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1552 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1553
1554 return &dev->stats;
1555}
1556
1557/*
1558 * Form the 64 bit 8390 multicast table from the linked list of addresses
1559 * associated with this dev structure.
1560 */
1561
1562static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1563{
1564 struct netdev_hw_addr *ha;
1565 u32 crc;
1566
1567 netdev_for_each_mc_addr(ha, dev) {
1568 crc = ether_crc(ETH_ALEN, ha->addr);
1569 /*
1570 * The 8390 uses the 6 most significant bits of the
1571 * CRC to index the multicast table.
1572 */
1573 bits[crc>>29] |= (1<<((crc>>26)&7));
1574 }
1575}
1576
1577/**
1578 * do_set_multicast_list - set/clear multicast filter
1579 * @dev: net device for which multicast filter is adjusted
1580 *
1581 * Set or clear the multicast filter for this adaptor.
1582 * Must be called with lock held.
1583 */
1584
1585static void do_set_multicast_list(struct net_device *dev)
1586{
1587 long e8390_base = dev->base_addr;
1588 int i;
1589 struct ei_device *ei_local = netdev_priv(dev);
1590
1591 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1592 memset(ei_local->mcfilter, 0, 8);
1593 if (!netdev_mc_empty(dev))
1594 make_mc_bits(ei_local->mcfilter, dev);
1595 } else {
1596 /* set to accept-all */
1597 memset(ei_local->mcfilter, 0xFF, 8);
1598 }
1599
1600 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1601 for(i = 0; i < 8; i++)
1602 {
1603 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1604 }
1605 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1606
1607 if(dev->flags&IFF_PROMISC)
1608 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1609 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1610 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1611 else
1612 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1613
1614 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1615}
1616
1617/*
1618 * Called without lock held. This is invoked from user context and may
1619 * be parallel to just about everything else. Its also fairly quick and
1620 * not called too often. Must protect against both bh and irq users
1621 */
1622
1623static void set_multicast_list(struct net_device *dev)
1624{
1625 unsigned long flags;
1626
1627 spin_lock_irqsave(&dev_lock(dev), flags);
1628 do_set_multicast_list(dev);
1629 spin_unlock_irqrestore(&dev_lock(dev), flags);
1630}
1631
1632/* This page of functions should be 8390 generic */
1633/* Follow National Semi's recommendations for initializing the "NIC". */
1634
1635/**
1636 * AX88190_init - initialize 8390 hardware
1637 * @dev: network device to initialize
1638 * @startp: boolean. non-zero value to initiate chip processing
1639 *
1640 * Must be called with lock held.
1641 */
1642
1643static void AX88190_init(struct net_device *dev, int startp)
1644{
1645 axnet_dev_t *info = PRIV(dev);
1646 long e8390_base = dev->base_addr;
1647 struct ei_device *ei_local = netdev_priv(dev);
1648 int i;
1649 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1650
1651 if(sizeof(struct e8390_pkt_hdr)!=4)
1652 panic("8390.c: header struct mispacked\n");
1653 /* Follow National Semi's recommendations for initing the DP83902. */
1654 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1655 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1656 /* Clear the remote byte count registers. */
1657 outb_p(0x00, e8390_base + EN0_RCNTLO);
1658 outb_p(0x00, e8390_base + EN0_RCNTHI);
1659 /* Set to monitor and loopback mode -- this is vital!. */
1660 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1661 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1662 /* Set the transmit page and receive ring. */
1663 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1664 ei_local->tx1 = ei_local->tx2 = 0;
1665 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1666 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1667 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1668 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1669 /* Clear the pending interrupts and mask. */
1670 outb_p(0xFF, e8390_base + EN0_ISR);
1671 outb_p(0x00, e8390_base + EN0_IMR);
1672
1673 /* Copy the station address into the DS8390 registers. */
1674
1675 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1676 for(i = 0; i < 6; i++)
1677 {
1678 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1679 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1680 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1681 }
1682
1683 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1684 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1685
1686 netif_start_queue(dev);
1687 ei_local->tx1 = ei_local->tx2 = 0;
1688 ei_local->txing = 0;
1689
1690 if (info->flags & IS_AX88790) /* select Internal PHY */
1691 outb(0x10, e8390_base + AXNET_GPIO);
1692
1693 if (startp)
1694 {
1695 outb_p(0xff, e8390_base + EN0_ISR);
1696 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1697 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1698 outb_p(E8390_TXCONFIG | info->duplex_flag,
1699 e8390_base + EN0_TXCR); /* xmit on. */
1700 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1701 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1702 do_set_multicast_list(dev); /* (re)load the mcast table */
1703 }
1704}
1705
1706/* Trigger a transmit start, assuming the length is valid.
1707 Always called with the page lock held */
1708
1709static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1710 int start_page)
1711{
1712 long e8390_base = dev->base_addr;
1713 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1714
1715 if (inb_p(e8390_base) & E8390_TRANS)
1716 {
1717 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1718 return;
1719 }
1720 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1721 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1722 outb_p(start_page, e8390_base + EN0_TPSR);
1723 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1724}