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
70 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
71 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
72 MODULE_LICENSE("GPL");
73
74
75 /*====================================================================*/
76
77 static int axnet_config(struct pcmcia_device *link);
78 static void axnet_release(struct pcmcia_device *link);
79 static int axnet_open(struct net_device *dev);
80 static int axnet_close(struct net_device *dev);
81 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
82 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
83 struct net_device *dev);
84 static struct net_device_stats *get_stats(struct net_device *dev);
85 static void set_multicast_list(struct net_device *dev);
86 static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue);
87 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
88 static void ei_watchdog(struct timer_list *t);
89 static void axnet_reset_8390(struct net_device *dev);
90
91 static int mdio_read(unsigned int addr, int phy_id, int loc);
92 static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
93
94 static void get_8390_hdr(struct net_device *,
95 struct e8390_pkt_hdr *, int);
96 static void block_input(struct net_device *dev, int count,
97 struct sk_buff *skb, int ring_offset);
98 static void block_output(struct net_device *dev, int count,
99 const u_char *buf, const int start_page);
100
101 static void axnet_detach(struct pcmcia_device *p_dev);
102
103 static void AX88190_init(struct net_device *dev, int startp);
104 static int ax_open(struct net_device *dev);
105 static int ax_close(struct net_device *dev);
106 static irqreturn_t ax_interrupt(int irq, void *dev_id);
107
108 /*====================================================================*/
109
110 struct 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
PRIV(struct net_device * dev)122 static 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
128 static 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
axnet_probe(struct pcmcia_device * link)140 static 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
axnet_detach(struct pcmcia_device * link)167 static 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
get_prom(struct pcmcia_device * link)186 static 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
try_io_port(struct pcmcia_device * link)232 static 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
axnet_configcheck(struct pcmcia_device * p_dev,void * priv_data)262 static 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
axnet_config(struct pcmcia_device * link)274 static 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
369 failed:
370 axnet_release(link);
371 return -ENODEV;
372 } /* axnet_config */
373
axnet_release(struct pcmcia_device * link)374 static void axnet_release(struct pcmcia_device *link)
375 {
376 pcmcia_disable_device(link);
377 }
378
axnet_suspend(struct pcmcia_device * link)379 static 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
axnet_resume(struct pcmcia_device * link)389 static 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
mdio_sync(unsigned int addr)420 static 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
mdio_read(unsigned int addr,int phy_id,int loc)429 static 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
mdio_write(unsigned int addr,int phy_id,int loc,int value)448 static 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
axnet_open(struct net_device * dev)467 static 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
axnet_close(struct net_device * dev)495 static 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
axnet_reset_8390(struct net_device * dev)519 static 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
ei_irq_wrapper(int irq,void * dev_id)544 static 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
ei_watchdog(struct timer_list * t)551 static 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
601 reschedule:
602 info->watchdog.expires = jiffies + HZ;
603 add_timer(&info->watchdog);
604 }
605
606 /*====================================================================*/
607
axnet_ioctl(struct net_device * dev,struct ifreq * rq,int cmd)608 static 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
get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)629 static 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
block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)648 static 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
block_output(struct net_device * dev,int count,const u_char * buf,const int start_page)669 static 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
688 static 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 };
719 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
720
721 static 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 };
730 module_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. */
813 static void ei_tx_intr(struct net_device *dev);
814 static void ei_tx_err(struct net_device *dev);
815 static void ei_receive(struct net_device *dev);
816 static void ei_rx_overrun(struct net_device *dev);
817
818 /* Routines generic to NS8390-based boards. */
819 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
820 int start_page);
821 static 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 */
ax_open(struct net_device * dev)857 static 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 */
ax_close(struct net_device * dev)885 static 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
axnet_tx_timeout(struct net_device * dev,unsigned int txqueue)909 static 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
axnet_start_xmit(struct sk_buff * skb,struct net_device * dev)954 static 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
ax_interrupt(int irq,void * dev_id)1088 static 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
ei_tx_err(struct net_device * dev)1211 static 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
ei_tx_intr(struct net_device * dev)1251 static 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
ei_receive(struct net_device * dev)1338 static 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
ei_rx_overrun(struct net_device * dev)1454 static 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
get_stats(struct net_device * dev)1520 static 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
make_mc_bits(u8 * bits,struct net_device * dev)1545 static 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
do_set_multicast_list(struct net_device * dev)1568 static 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
set_multicast_list(struct net_device * dev)1606 static 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
AX88190_init(struct net_device * dev,int startp)1626 static 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
NS8390_trigger_send(struct net_device * dev,unsigned int length,int start_page)1692 static 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 }
1708