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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/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 int xfer_count = count;
654 char *buf = skb->data;
655
656 if ((netif_msg_rx_status(ei_local)) && (count != 4))
657 netdev_dbg(dev, "[bi=%d]\n", 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);
665 xfer_count++;
666 }
667
668}
669
670/*====================================================================*/
671
672static void block_output(struct net_device *dev, int count,
673 const u_char *buf, const int start_page)
674{
675 unsigned int nic_base = dev->base_addr;
676
677 pr_debug("%s: [bo=%d]\n", dev->name, count);
678
679 /* Round the count up for word writes. Do we need to do this?
680 What effect will an odd byte count have on the 8390?
681 I should check someday. */
682 if (count & 0x01)
683 count++;
684
685 outb_p(0x00, nic_base + EN0_RSARLO);
686 outb_p(start_page, nic_base + EN0_RSARHI);
687 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
688 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
689}
690
691static const struct pcmcia_device_id axnet_ids[] = {
692 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
693 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
694 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
695 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
696 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
697 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
698 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
699 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
700 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
701 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
702 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
703 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
704 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
705 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
706 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
707 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
708 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
709 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
710 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
711 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
712 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
713 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
714 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
715 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
716 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
717 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
718 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
719 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
720 PCMCIA_DEVICE_NULL,
721};
722MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
723
724static struct pcmcia_driver axnet_cs_driver = {
725 .owner = THIS_MODULE,
726 .name = "axnet_cs",
727 .probe = axnet_probe,
728 .remove = axnet_detach,
729 .id_table = axnet_ids,
730 .suspend = axnet_suspend,
731 .resume = axnet_resume,
732};
733module_pcmcia_driver(axnet_cs_driver);
734
735/*====================================================================*/
736
737/* 8390.c: A general NS8390 ethernet driver core for linux. */
738/*
739 Written 1992-94 by Donald Becker.
740
741 Copyright 1993 United States Government as represented by the
742 Director, National Security Agency.
743
744 This software may be used and distributed according to the terms
745 of the GNU General Public License, incorporated herein by reference.
746
747 The author may be reached as becker@scyld.com, or C/O
748 Scyld Computing Corporation
749 410 Severn Ave., Suite 210
750 Annapolis MD 21403
751
752 This is the chip-specific code for many 8390-based ethernet adaptors.
753 This is not a complete driver, it must be combined with board-specific
754 code such as ne.c, wd.c, 3c503.c, etc.
755
756 Seeing how at least eight drivers use this code, (not counting the
757 PCMCIA ones either) it is easy to break some card by what seems like
758 a simple innocent change. Please contact me or Donald if you think
759 you have found something that needs changing. -- PG
760
761 Changelog:
762
763 Paul Gortmaker : remove set_bit lock, other cleanups.
764 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
765 ei_block_input() for eth_io_copy_and_sum().
766 Paul Gortmaker : exchange static int ei_pingpong for a #define,
767 also add better Tx error handling.
768 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
769 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
770 Paul Gortmaker : tweak ANK's above multicast changes a bit.
771 Paul Gortmaker : update packet statistics for v2.1.x
772 Alan Cox : support arbitrary stupid port mappings on the
773 68K Macintosh. Support >16bit I/O spaces
774 Paul Gortmaker : add kmod support for auto-loading of the 8390
775 module by all drivers that require it.
776 Alan Cox : Spinlocking work, added 'BUG_83C690'
777 Paul Gortmaker : Separate out Tx timeout code from Tx path.
778
779 Sources:
780 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
781
782 */
783
784#include <linux/bitops.h>
785#include <asm/irq.h>
786#include <linux/fcntl.h>
787#include <linux/in.h>
788#include <linux/interrupt.h>
789
790#define BUG_83C690
791
792/* These are the operational function interfaces to board-specific
793 routines.
794 void reset_8390(struct net_device *dev)
795 Resets the board associated with DEV, including a hardware reset of
796 the 8390. This is only called when there is a transmit timeout, and
797 it is always followed by 8390_init().
798 void block_output(struct net_device *dev, int count, const unsigned char *buf,
799 int start_page)
800 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
801 "page" value uses the 8390's 256-byte pages.
802 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
803 Read the 4 byte, page aligned 8390 header. *If* there is a
804 subsequent read, it will be of the rest of the packet.
805 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
806 Read COUNT bytes from the packet buffer into the skb data area. Start
807 reading from RING_OFFSET, the address as the 8390 sees it. This will always
808 follow the read of the 8390 header.
809*/
810#define ei_reset_8390 (ei_local->reset_8390)
811#define ei_block_output (ei_local->block_output)
812#define ei_block_input (ei_local->block_input)
813#define ei_get_8390_hdr (ei_local->get_8390_hdr)
814
815/* Index to functions. */
816static void ei_tx_intr(struct net_device *dev);
817static void ei_tx_err(struct net_device *dev);
818static void ei_receive(struct net_device *dev);
819static void ei_rx_overrun(struct net_device *dev);
820
821/* Routines generic to NS8390-based boards. */
822static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
823 int start_page);
824static void do_set_multicast_list(struct net_device *dev);
825
826/*
827 * SMP and the 8390 setup.
828 *
829 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
830 * a page register that controls bank and packet buffer access. We guard
831 * this with ei_local->page_lock. Nobody should assume or set the page other
832 * than zero when the lock is not held. Lock holders must restore page 0
833 * before unlocking. Even pure readers must take the lock to protect in
834 * page 0.
835 *
836 * To make life difficult the chip can also be very slow. We therefore can't
837 * just use spinlocks. For the longer lockups we disable the irq the device
838 * sits on and hold the lock. We must hold the lock because there is a dual
839 * processor case other than interrupts (get stats/set multicast list in
840 * parallel with each other and transmit).
841 *
842 * Note: in theory we can just disable the irq on the card _but_ there is
843 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
844 * enter lock, take the queued irq. So we waddle instead of flying.
845 *
846 * Finally by special arrangement for the purpose of being generally
847 * annoying the transmit function is called bh atomic. That places
848 * restrictions on the user context callers as disable_irq won't save
849 * them.
850 */
851
852/**
853 * ax_open - Open/initialize the board.
854 * @dev: network device to initialize
855 *
856 * This routine goes all-out, setting everything
857 * up anew at each open, even though many of these registers should only
858 * need to be set once at boot.
859 */
860static int ax_open(struct net_device *dev)
861{
862 unsigned long flags;
863 struct ei_device *ei_local = netdev_priv(dev);
864
865 /*
866 * Grab the page lock so we own the register set, then call
867 * the init function.
868 */
869
870 spin_lock_irqsave(&ei_local->page_lock, flags);
871 AX88190_init(dev, 1);
872 /* Set the flag before we drop the lock, That way the IRQ arrives
873 after its set and we get no silly warnings */
874 netif_start_queue(dev);
875 spin_unlock_irqrestore(&ei_local->page_lock, flags);
876 ei_local->irqlock = 0;
877 return 0;
878}
879
880#define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
881
882/**
883 * ax_close - shut down network device
884 * @dev: network device to close
885 *
886 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
887 */
888static int ax_close(struct net_device *dev)
889{
890 unsigned long flags;
891
892 /*
893 * Hold the page lock during close
894 */
895
896 spin_lock_irqsave(&dev_lock(dev), flags);
897 AX88190_init(dev, 0);
898 spin_unlock_irqrestore(&dev_lock(dev), flags);
899 netif_stop_queue(dev);
900 return 0;
901}
902
903/**
904 * axnet_tx_timeout - handle transmit time out condition
905 * @dev: network device which has apparently fallen asleep
906 * @txqueue: unused
907 *
908 * Called by kernel when device never acknowledges a transmit has
909 * completed (or failed) - i.e. never posted a Tx related interrupt.
910 */
911
912static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue)
913{
914 long e8390_base = dev->base_addr;
915 struct ei_device *ei_local = netdev_priv(dev);
916 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
917 unsigned long flags;
918
919 dev->stats.tx_errors++;
920
921 spin_lock_irqsave(&ei_local->page_lock, flags);
922 txsr = inb(e8390_base+EN0_TSR);
923 isr = inb(e8390_base+EN0_ISR);
924 spin_unlock_irqrestore(&ei_local->page_lock, flags);
925
926 netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
927 (txsr & ENTSR_ABT) ? "excess collisions." :
928 (isr) ? "lost interrupt?" : "cable problem?",
929 txsr, isr, tickssofar);
930
931 if (!isr && !dev->stats.tx_packets)
932 {
933 /* The 8390 probably hasn't gotten on the cable yet. */
934 ei_local->interface_num ^= 1; /* Try a different xcvr. */
935 }
936
937 /* Ugly but a reset can be slow, yet must be protected */
938
939 spin_lock_irqsave(&ei_local->page_lock, flags);
940
941 /* Try to restart the card. Perhaps the user has fixed something. */
942 ei_reset_8390(dev);
943 AX88190_init(dev, 1);
944
945 spin_unlock_irqrestore(&ei_local->page_lock, flags);
946 netif_wake_queue(dev);
947}
948
949/**
950 * axnet_start_xmit - begin packet transmission
951 * @skb: packet to be sent
952 * @dev: network device to which packet is sent
953 *
954 * Sends a packet to an 8390 network device.
955 */
956
957static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
958 struct net_device *dev)
959{
960 long e8390_base = dev->base_addr;
961 struct ei_device *ei_local = netdev_priv(dev);
962 int length, send_length, output_page;
963 unsigned long flags;
964 u8 packet[ETH_ZLEN];
965
966 netif_stop_queue(dev);
967
968 length = skb->len;
969
970 /* Mask interrupts from the ethercard.
971 SMP: We have to grab the lock here otherwise the IRQ handler
972 on another CPU can flip window and race the IRQ mask set. We end
973 up trashing the mcast filter not disabling irqs if we don't lock */
974
975 spin_lock_irqsave(&ei_local->page_lock, flags);
976 outb_p(0x00, e8390_base + EN0_IMR);
977
978 /*
979 * Slow phase with lock held.
980 */
981
982 ei_local->irqlock = 1;
983
984 send_length = max(length, ETH_ZLEN);
985
986 /*
987 * We have two Tx slots available for use. Find the first free
988 * slot, and then perform some sanity checks. With two Tx bufs,
989 * you get very close to transmitting back-to-back packets. With
990 * only one Tx buf, the transmitter sits idle while you reload the
991 * card, leaving a substantial gap between each transmitted packet.
992 */
993
994 if (ei_local->tx1 == 0)
995 {
996 output_page = ei_local->tx_start_page;
997 ei_local->tx1 = send_length;
998 if ((netif_msg_tx_queued(ei_local)) &&
999 ei_local->tx2 > 0)
1000 netdev_dbg(dev,
1001 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1002 ei_local->tx2, ei_local->lasttx,
1003 ei_local->txing);
1004 }
1005 else if (ei_local->tx2 == 0)
1006 {
1007 output_page = ei_local->tx_start_page + TX_PAGES/2;
1008 ei_local->tx2 = send_length;
1009 if ((netif_msg_tx_queued(ei_local)) &&
1010 ei_local->tx1 > 0)
1011 netdev_dbg(dev,
1012 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1013 ei_local->tx1, ei_local->lasttx,
1014 ei_local->txing);
1015 }
1016 else
1017 { /* We should never get here. */
1018 netif_dbg(ei_local, tx_err, dev,
1019 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1020 ei_local->tx1, ei_local->tx2,
1021 ei_local->lasttx);
1022 ei_local->irqlock = 0;
1023 netif_stop_queue(dev);
1024 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1025 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1026 dev->stats.tx_errors++;
1027 return NETDEV_TX_BUSY;
1028 }
1029
1030 /*
1031 * Okay, now upload the packet and trigger a send if the transmitter
1032 * isn't already sending. If it is busy, the interrupt handler will
1033 * trigger the send later, upon receiving a Tx done interrupt.
1034 */
1035
1036 if (length == skb->len)
1037 ei_block_output(dev, length, skb->data, output_page);
1038 else {
1039 memset(packet, 0, ETH_ZLEN);
1040 skb_copy_from_linear_data(skb, packet, skb->len);
1041 ei_block_output(dev, length, packet, output_page);
1042 }
1043
1044 if (! ei_local->txing)
1045 {
1046 ei_local->txing = 1;
1047 NS8390_trigger_send(dev, send_length, output_page);
1048 netif_trans_update(dev);
1049 if (output_page == ei_local->tx_start_page)
1050 {
1051 ei_local->tx1 = -1;
1052 ei_local->lasttx = -1;
1053 }
1054 else
1055 {
1056 ei_local->tx2 = -1;
1057 ei_local->lasttx = -2;
1058 }
1059 }
1060 else ei_local->txqueue++;
1061
1062 if (ei_local->tx1 && ei_local->tx2)
1063 netif_stop_queue(dev);
1064 else
1065 netif_start_queue(dev);
1066
1067 /* Turn 8390 interrupts back on. */
1068 ei_local->irqlock = 0;
1069 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1070
1071 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1072
1073 dev_kfree_skb (skb);
1074 dev->stats.tx_bytes += send_length;
1075
1076 return NETDEV_TX_OK;
1077}
1078
1079/**
1080 * ax_interrupt - handle the interrupts from an 8390
1081 * @irq: interrupt number
1082 * @dev_id: a pointer to the net_device
1083 *
1084 * Handle the ether interface interrupts. We pull packets from
1085 * the 8390 via the card specific functions and fire them at the networking
1086 * stack. We also handle transmit completions and wake the transmit path if
1087 * necessary. We also update the counters and do other housekeeping as
1088 * needed.
1089 */
1090
1091static irqreturn_t ax_interrupt(int irq, void *dev_id)
1092{
1093 struct net_device *dev = dev_id;
1094 long e8390_base;
1095 int interrupts, nr_serviced = 0, i;
1096 struct ei_device *ei_local;
1097 int handled = 0;
1098 unsigned long flags;
1099
1100 e8390_base = dev->base_addr;
1101 ei_local = netdev_priv(dev);
1102
1103 /*
1104 * Protect the irq test too.
1105 */
1106
1107 spin_lock_irqsave(&ei_local->page_lock, flags);
1108
1109 if (ei_local->irqlock) {
1110#if 1 /* This might just be an interrupt for a PCI device sharing this line */
1111 const char *msg;
1112 /* The "irqlock" check is only for testing. */
1113 if (ei_local->irqlock)
1114 msg = "Interrupted while interrupts are masked!";
1115 else
1116 msg = "Reentering the interrupt handler!";
1117 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1118 msg,
1119 inb_p(e8390_base + EN0_ISR),
1120 inb_p(e8390_base + EN0_IMR));
1121#endif
1122 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1123 return IRQ_NONE;
1124 }
1125
1126 netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
1127 inb_p(e8390_base + EN0_ISR));
1128
1129 outb_p(0x00, e8390_base + EN0_ISR);
1130 ei_local->irqlock = 1;
1131
1132 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1133 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1134 ++nr_serviced < MAX_SERVICE)
1135 {
1136 if (!netif_running(dev) || (interrupts == 0xff)) {
1137 netif_warn(ei_local, intr, dev,
1138 "interrupt from stopped card\n");
1139 outb_p(interrupts, e8390_base + EN0_ISR);
1140 interrupts = 0;
1141 break;
1142 }
1143 handled = 1;
1144
1145 /* AX88190 bug fix. */
1146 outb_p(interrupts, e8390_base + EN0_ISR);
1147 for (i = 0; i < 10; i++) {
1148 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1149 break;
1150 outb_p(0, e8390_base + EN0_ISR);
1151 outb_p(interrupts, e8390_base + EN0_ISR);
1152 }
1153 if (interrupts & ENISR_OVER)
1154 ei_rx_overrun(dev);
1155 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1156 {
1157 /* Got a good (?) packet. */
1158 ei_receive(dev);
1159 }
1160 /* Push the next to-transmit packet through. */
1161 if (interrupts & ENISR_TX)
1162 ei_tx_intr(dev);
1163 else if (interrupts & ENISR_TX_ERR)
1164 ei_tx_err(dev);
1165
1166 if (interrupts & ENISR_COUNTERS)
1167 {
1168 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1169 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1170 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1171 }
1172 }
1173
1174 if (interrupts && (netif_msg_intr(ei_local)))
1175 {
1176 handled = 1;
1177 if (nr_serviced >= MAX_SERVICE)
1178 {
1179 /* 0xFF is valid for a card removal */
1180 if (interrupts != 0xFF)
1181 netdev_warn(dev,
1182 "Too much work at interrupt, status %#2.2x\n",
1183 interrupts);
1184 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1185 } else {
1186 netdev_warn(dev, "unknown interrupt %#2x\n",
1187 interrupts);
1188 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1189 }
1190 }
1191
1192 /* Turn 8390 interrupts back on. */
1193 ei_local->irqlock = 0;
1194 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1195
1196 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1197 return IRQ_RETVAL(handled);
1198}
1199
1200/**
1201 * ei_tx_err - handle transmitter error
1202 * @dev: network device which threw the exception
1203 *
1204 * A transmitter error has happened. Most likely excess collisions (which
1205 * is a fairly normal condition). If the error is one where the Tx will
1206 * have been aborted, we try and send another one right away, instead of
1207 * letting the failed packet sit and collect dust in the Tx buffer. This
1208 * is a much better solution as it avoids kernel based Tx timeouts, and
1209 * an unnecessary card reset.
1210 *
1211 * Called with lock held.
1212 */
1213
1214static void ei_tx_err(struct net_device *dev)
1215{
1216 long e8390_base = dev->base_addr;
1217 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1218 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1219
1220#ifdef VERBOSE_ERROR_DUMP
1221 netdev_dbg(dev, "transmitter error (%#2x):", txsr);
1222 if (txsr & ENTSR_ABT)
1223 pr_cont(" excess-collisions");
1224 if (txsr & ENTSR_ND)
1225 pr_cont(" non-deferral");
1226 if (txsr & ENTSR_CRS)
1227 pr_cont(" lost-carrier");
1228 if (txsr & ENTSR_FU)
1229 pr_cont(" FIFO-underrun");
1230 if (txsr & ENTSR_CDH)
1231 pr_cont(" lost-heartbeat");
1232 pr_cont("\n");
1233#endif
1234
1235 if (tx_was_aborted)
1236 ei_tx_intr(dev);
1237 else
1238 {
1239 dev->stats.tx_errors++;
1240 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1241 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1242 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1243 }
1244}
1245
1246/**
1247 * ei_tx_intr - transmit interrupt handler
1248 * @dev: network device for which tx intr is handled
1249 *
1250 * We have finished a transmit: check for errors and then trigger the next
1251 * packet to be sent. Called with lock held.
1252 */
1253
1254static void ei_tx_intr(struct net_device *dev)
1255{
1256 long e8390_base = dev->base_addr;
1257 struct ei_device *ei_local = netdev_priv(dev);
1258 int status = inb(e8390_base + EN0_TSR);
1259
1260 /*
1261 * There are two Tx buffers, see which one finished, and trigger
1262 * the send of another one if it exists.
1263 */
1264 ei_local->txqueue--;
1265
1266 if (ei_local->tx1 < 0)
1267 {
1268 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1269 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1270 ei_local->name, ei_local->lasttx,
1271 ei_local->tx1);
1272 ei_local->tx1 = 0;
1273 if (ei_local->tx2 > 0)
1274 {
1275 ei_local->txing = 1;
1276 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1277 netif_trans_update(dev);
1278 ei_local->tx2 = -1;
1279 ei_local->lasttx = 2;
1280 } else {
1281 ei_local->lasttx = 20;
1282 ei_local->txing = 0;
1283 }
1284 }
1285 else if (ei_local->tx2 < 0)
1286 {
1287 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1288 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1289 ei_local->name, ei_local->lasttx,
1290 ei_local->tx2);
1291 ei_local->tx2 = 0;
1292 if (ei_local->tx1 > 0)
1293 {
1294 ei_local->txing = 1;
1295 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1296 netif_trans_update(dev);
1297 ei_local->tx1 = -1;
1298 ei_local->lasttx = 1;
1299 } else {
1300 ei_local->lasttx = 10;
1301 ei_local->txing = 0;
1302 }
1303 }
1304// else
1305// netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1306// ei_local->lasttx);
1307
1308 /* Minimize Tx latency: update the statistics after we restart TXing. */
1309 if (status & ENTSR_COL)
1310 dev->stats.collisions++;
1311 if (status & ENTSR_PTX)
1312 dev->stats.tx_packets++;
1313 else
1314 {
1315 dev->stats.tx_errors++;
1316 if (status & ENTSR_ABT)
1317 {
1318 dev->stats.tx_aborted_errors++;
1319 dev->stats.collisions += 16;
1320 }
1321 if (status & ENTSR_CRS)
1322 dev->stats.tx_carrier_errors++;
1323 if (status & ENTSR_FU)
1324 dev->stats.tx_fifo_errors++;
1325 if (status & ENTSR_CDH)
1326 dev->stats.tx_heartbeat_errors++;
1327 if (status & ENTSR_OWC)
1328 dev->stats.tx_window_errors++;
1329 }
1330 netif_wake_queue(dev);
1331}
1332
1333/**
1334 * ei_receive - receive some packets
1335 * @dev: network device with which receive will be run
1336 *
1337 * We have a good packet(s), get it/them out of the buffers.
1338 * Called with lock held.
1339 */
1340
1341static void ei_receive(struct net_device *dev)
1342{
1343 long e8390_base = dev->base_addr;
1344 struct ei_device *ei_local = netdev_priv(dev);
1345 unsigned char rxing_page, this_frame, next_frame;
1346 unsigned short current_offset;
1347 int rx_pkt_count = 0;
1348 struct e8390_pkt_hdr rx_frame;
1349
1350 while (++rx_pkt_count < 10)
1351 {
1352 int pkt_len, pkt_stat;
1353
1354 /* Get the rx page (incoming packet pointer). */
1355 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1356
1357 /* Remove one frame from the ring. Boundary is always a page behind. */
1358 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1359 if (this_frame >= ei_local->stop_page)
1360 this_frame = ei_local->rx_start_page;
1361
1362 /* Someday we'll omit the previous, iff we never get this message.
1363 (There is at least one clone claimed to have a problem.)
1364
1365 Keep quiet if it looks like a card removal. One problem here
1366 is that some clones crash in roughly the same way.
1367 */
1368 if ((netif_msg_rx_err(ei_local)) &&
1369 this_frame != ei_local->current_page &&
1370 (this_frame != 0x0 || rxing_page != 0xFF))
1371 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1372 this_frame, ei_local->current_page);
1373
1374 if (this_frame == rxing_page) /* Read all the frames? */
1375 break; /* Done for now */
1376
1377 current_offset = this_frame << 8;
1378 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1379
1380 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1381 pkt_stat = rx_frame.status;
1382
1383 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1384
1385 if (pkt_len < 60 || pkt_len > 1518)
1386 {
1387 netif_err(ei_local, rx_err, dev,
1388 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1389 rx_frame.count, rx_frame.status,
1390 rx_frame.next);
1391 dev->stats.rx_errors++;
1392 dev->stats.rx_length_errors++;
1393 }
1394 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1395 {
1396 struct sk_buff *skb;
1397
1398 skb = netdev_alloc_skb(dev, pkt_len + 2);
1399 if (skb == NULL)
1400 {
1401 netif_err(ei_local, rx_err, dev,
1402 "Couldn't allocate a sk_buff of size %d\n",
1403 pkt_len);
1404 dev->stats.rx_dropped++;
1405 break;
1406 }
1407 else
1408 {
1409 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1410 skb_put(skb, pkt_len); /* Make room */
1411 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1412 skb->protocol=eth_type_trans(skb,dev);
1413 netif_rx(skb);
1414 dev->stats.rx_packets++;
1415 dev->stats.rx_bytes += pkt_len;
1416 if (pkt_stat & ENRSR_PHY)
1417 dev->stats.multicast++;
1418 }
1419 }
1420 else
1421 {
1422 netif_err(ei_local, rx_err, dev,
1423 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1424 rx_frame.status, rx_frame.next,
1425 rx_frame.count);
1426 dev->stats.rx_errors++;
1427 /* NB: The NIC counts CRC, frame and missed errors. */
1428 if (pkt_stat & ENRSR_FO)
1429 dev->stats.rx_fifo_errors++;
1430 }
1431 next_frame = rx_frame.next;
1432
1433 /* This _should_ never happen: it's here for avoiding bad clones. */
1434 if (next_frame >= ei_local->stop_page) {
1435 netdev_info(dev, "next frame inconsistency, %#2x\n",
1436 next_frame);
1437 next_frame = ei_local->rx_start_page;
1438 }
1439 ei_local->current_page = next_frame;
1440 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1441 }
1442}
1443
1444/**
1445 * ei_rx_overrun - handle receiver overrun
1446 * @dev: network device which threw exception
1447 *
1448 * We have a receiver overrun: we have to kick the 8390 to get it started
1449 * again. Problem is that you have to kick it exactly as NS prescribes in
1450 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1451 * This includes causing "the NIC to defer indefinitely when it is stopped
1452 * on a busy network." Ugh.
1453 * Called with lock held. Don't call this with the interrupts off or your
1454 * computer will hate you - it takes 10ms or so.
1455 */
1456
1457static void ei_rx_overrun(struct net_device *dev)
1458{
1459 struct axnet_dev *info = PRIV(dev);
1460 long e8390_base = dev->base_addr;
1461 unsigned char was_txing, must_resend = 0;
1462 struct ei_device *ei_local = netdev_priv(dev);
1463
1464 /*
1465 * Record whether a Tx was in progress and then issue the
1466 * stop command.
1467 */
1468 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1469 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1470
1471 netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
1472 dev->stats.rx_over_errors++;
1473
1474 /*
1475 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1476 * We wait at least 2ms.
1477 */
1478
1479 mdelay(2);
1480
1481 /*
1482 * Reset RBCR[01] back to zero as per magic incantation.
1483 */
1484 outb_p(0x00, e8390_base+EN0_RCNTLO);
1485 outb_p(0x00, e8390_base+EN0_RCNTHI);
1486
1487 /*
1488 * See if any Tx was interrupted or not. According to NS, this
1489 * step is vital, and skipping it will cause no end of havoc.
1490 */
1491
1492 if (was_txing)
1493 {
1494 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1495 if (!tx_completed)
1496 must_resend = 1;
1497 }
1498
1499 /*
1500 * Have to enter loopback mode and then restart the NIC before
1501 * you are allowed to slurp packets up off the ring.
1502 */
1503 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1504 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1505
1506 /*
1507 * Clear the Rx ring of all the debris, and ack the interrupt.
1508 */
1509 ei_receive(dev);
1510
1511 /*
1512 * Leave loopback mode, and resend any packet that got stopped.
1513 */
1514 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1515 if (must_resend)
1516 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1517}
1518
1519/*
1520 * Collect the stats. This is called unlocked and from several contexts.
1521 */
1522
1523static struct net_device_stats *get_stats(struct net_device *dev)
1524{
1525 long ioaddr = dev->base_addr;
1526 struct ei_device *ei_local = netdev_priv(dev);
1527 unsigned long flags;
1528
1529 /* If the card is stopped, just return the present stats. */
1530 if (!netif_running(dev))
1531 return &dev->stats;
1532
1533 spin_lock_irqsave(&ei_local->page_lock,flags);
1534 /* Read the counter registers, assuming we are in page 0. */
1535 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1536 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1537 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1538 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1539
1540 return &dev->stats;
1541}
1542
1543/*
1544 * Form the 64 bit 8390 multicast table from the linked list of addresses
1545 * associated with this dev structure.
1546 */
1547
1548static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1549{
1550 struct netdev_hw_addr *ha;
1551 u32 crc;
1552
1553 netdev_for_each_mc_addr(ha, dev) {
1554 crc = ether_crc(ETH_ALEN, ha->addr);
1555 /*
1556 * The 8390 uses the 6 most significant bits of the
1557 * CRC to index the multicast table.
1558 */
1559 bits[crc>>29] |= (1<<((crc>>26)&7));
1560 }
1561}
1562
1563/**
1564 * do_set_multicast_list - set/clear multicast filter
1565 * @dev: net device for which multicast filter is adjusted
1566 *
1567 * Set or clear the multicast filter for this adaptor.
1568 * Must be called with lock held.
1569 */
1570
1571static void do_set_multicast_list(struct net_device *dev)
1572{
1573 long e8390_base = dev->base_addr;
1574 int i;
1575 struct ei_device *ei_local = netdev_priv(dev);
1576
1577 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1578 memset(ei_local->mcfilter, 0, 8);
1579 if (!netdev_mc_empty(dev))
1580 make_mc_bits(ei_local->mcfilter, dev);
1581 } else {
1582 /* set to accept-all */
1583 memset(ei_local->mcfilter, 0xFF, 8);
1584 }
1585
1586 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1587 for(i = 0; i < 8; i++)
1588 {
1589 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1590 }
1591 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1592
1593 if(dev->flags&IFF_PROMISC)
1594 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1595 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1596 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1597 else
1598 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1599
1600 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1601}
1602
1603/*
1604 * Called without lock held. This is invoked from user context and may
1605 * be parallel to just about everything else. Its also fairly quick and
1606 * not called too often. Must protect against both bh and irq users
1607 */
1608
1609static void set_multicast_list(struct net_device *dev)
1610{
1611 unsigned long flags;
1612
1613 spin_lock_irqsave(&dev_lock(dev), flags);
1614 do_set_multicast_list(dev);
1615 spin_unlock_irqrestore(&dev_lock(dev), flags);
1616}
1617
1618/* This page of functions should be 8390 generic */
1619/* Follow National Semi's recommendations for initializing the "NIC". */
1620
1621/**
1622 * AX88190_init - initialize 8390 hardware
1623 * @dev: network device to initialize
1624 * @startp: boolean. non-zero value to initiate chip processing
1625 *
1626 * Must be called with lock held.
1627 */
1628
1629static void AX88190_init(struct net_device *dev, int startp)
1630{
1631 struct axnet_dev *info = PRIV(dev);
1632 long e8390_base = dev->base_addr;
1633 struct ei_device *ei_local = netdev_priv(dev);
1634 int i;
1635 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1636
1637 if(sizeof(struct e8390_pkt_hdr)!=4)
1638 panic("8390.c: header struct mispacked\n");
1639 /* Follow National Semi's recommendations for initing the DP83902. */
1640 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1641 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1642 /* Clear the remote byte count registers. */
1643 outb_p(0x00, e8390_base + EN0_RCNTLO);
1644 outb_p(0x00, e8390_base + EN0_RCNTHI);
1645 /* Set to monitor and loopback mode -- this is vital!. */
1646 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1647 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1648 /* Set the transmit page and receive ring. */
1649 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1650 ei_local->tx1 = ei_local->tx2 = 0;
1651 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1652 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1653 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1654 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1655 /* Clear the pending interrupts and mask. */
1656 outb_p(0xFF, e8390_base + EN0_ISR);
1657 outb_p(0x00, e8390_base + EN0_IMR);
1658
1659 /* Copy the station address into the DS8390 registers. */
1660
1661 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1662 for(i = 0; i < 6; i++)
1663 {
1664 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1665 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1666 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1667 }
1668
1669 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1670 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1671
1672 netif_start_queue(dev);
1673 ei_local->tx1 = ei_local->tx2 = 0;
1674 ei_local->txing = 0;
1675
1676 if (info->flags & IS_AX88790) /* select Internal PHY */
1677 outb(0x10, e8390_base + AXNET_GPIO);
1678
1679 if (startp)
1680 {
1681 outb_p(0xff, e8390_base + EN0_ISR);
1682 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1683 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1684 outb_p(E8390_TXCONFIG | info->duplex_flag,
1685 e8390_base + EN0_TXCR); /* xmit on. */
1686 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1687 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1688 do_set_multicast_list(dev); /* (re)load the mcast table */
1689 }
1690}
1691
1692/* Trigger a transmit start, assuming the length is valid.
1693 Always called with the page lock held */
1694
1695static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1696 int start_page)
1697{
1698 long e8390_base = dev->base_addr;
1699 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1700
1701 if (inb_p(e8390_base) & E8390_TRANS)
1702 {
1703 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1704 return;
1705 }
1706 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1707 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1708 outb_p(start_page, e8390_base + EN0_TPSR);
1709 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
1710}