1 /*======================================================================
3 A PCMCIA ethernet driver for Asix AX88190-based cards
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.
12 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
14 axnet_cs.c 1.28 2002/06/29 06:27:37
16 The network driver code is based on Donald Becker's NE2000 code:
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
25 ======================================================================*/
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/ptrace.h>
31 #include <linux/slab.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
35 #include <linux/spinlock.h>
36 #include <linux/ethtool.h>
37 #include <linux/netdevice.h>
38 #include <linux/crc32.h>
41 #include <pcmcia/cs_types.h>
42 #include <pcmcia/cs.h>
43 #include <pcmcia/cistpl.h>
44 #include <pcmcia/ciscode.h>
45 #include <pcmcia/ds.h>
46 #include <pcmcia/cisreg.h>
49 #include <asm/system.h>
50 #include <asm/byteorder.h>
51 #include <asm/uaccess.h>
53 #define AXNET_CMD 0x00
54 #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
55 #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
56 #define AXNET_MII_EEP 0x14 /* Offset of MII access port */
57 #define AXNET_TEST 0x15 /* Offset of TEST Register port */
58 #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
60 #define AXNET_START_PG 0x40 /* First page of TX buffer */
61 #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
63 #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
65 #define IS_AX88190 0x0001
66 #define IS_AX88790 0x0002
68 /*====================================================================*/
70 /* Module parameters */
72 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
73 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
74 MODULE_LICENSE("GPL");
77 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0)
79 INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG);
80 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
81 static char *version =
82 "axnet_cs.c 1.28 2002/06/29 06:27:37 (David Hinds)";
84 #define DEBUG(n, args...)
87 /*====================================================================*/
89 static void axnet_config(dev_link_t *link);
90 static void axnet_release(dev_link_t *link);
91 static int axnet_open(struct net_device *dev);
92 static int axnet_close(struct net_device *dev);
93 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
94 static struct ethtool_ops netdev_ethtool_ops;
95 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs);
96 static void ei_watchdog(u_long arg);
97 static void axnet_reset_8390(struct net_device *dev);
99 static int mdio_read(kio_addr_t addr, int phy_id, int loc);
100 static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value);
102 static void get_8390_hdr(struct net_device *,
103 struct e8390_pkt_hdr *, int);
104 static void block_input(struct net_device *dev, int count,
105 struct sk_buff *skb, int ring_offset);
106 static void block_output(struct net_device *dev, int count,
107 const u_char *buf, const int start_page);
109 static void axnet_detach(struct pcmcia_device *p_dev);
111 static void axdev_setup(struct net_device *dev);
112 static void AX88190_init(struct net_device *dev, int startp);
113 static int ax_open(struct net_device *dev);
114 static int ax_close(struct net_device *dev);
115 static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs *regs);
117 /*====================================================================*/
119 typedef struct axnet_dev_t {
123 struct timer_list watchdog;
124 int stale, fast_poll;
131 static inline axnet_dev_t *PRIV(struct net_device *dev)
133 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
137 /*======================================================================
139 axnet_attach() creates an "instance" of the driver, allocating
140 local data structures for one device. The device is registered
143 ======================================================================*/
145 static int axnet_attach(struct pcmcia_device *p_dev)
149 struct net_device *dev;
151 DEBUG(0, "axnet_attach()\n");
153 dev = alloc_netdev(sizeof(struct ei_device) + sizeof(axnet_dev_t),
154 "eth%d", axdev_setup);
162 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
163 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
164 link->conf.Attributes = CONF_ENABLE_IRQ;
165 link->conf.IntType = INT_MEMORY_AND_IO;
167 dev->open = &axnet_open;
168 dev->stop = &axnet_close;
169 dev->do_ioctl = &axnet_ioctl;
170 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
172 link->handle = p_dev;
173 p_dev->instance = link;
175 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
181 /*======================================================================
183 This deletes a driver "instance". The device is de-registered
184 with Card Services. If it has been released, all local data
185 structures are freed. Otherwise, the structures will be freed
186 when the device is released.
188 ======================================================================*/
190 static void axnet_detach(struct pcmcia_device *p_dev)
192 dev_link_t *link = dev_to_instance(p_dev);
193 struct net_device *dev = link->priv;
195 DEBUG(0, "axnet_detach(0x%p)\n", link);
198 unregister_netdev(dev);
200 if (link->state & DEV_CONFIG)
206 /*======================================================================
208 This probes for a card's hardware address by reading the PROM.
210 ======================================================================*/
212 static int get_prom(dev_link_t *link)
214 struct net_device *dev = link->priv;
215 kio_addr_t ioaddr = dev->base_addr;
218 /* This is based on drivers/net/ne.c */
220 u_char value, offset;
222 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
223 {0x01, EN0_DCFG}, /* Set word-wide access. */
224 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
226 {0x00, EN0_IMR}, /* Mask completion irq. */
228 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
229 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
232 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
234 {E8390_RREAD+E8390_START, E8390_CMD},
237 /* Not much of a test, but the alternatives are messy */
238 if (link->conf.ConfigBase != 0x03c0)
241 axnet_reset_8390(dev);
244 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
245 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
247 for (i = 0; i < 6; i += 2) {
248 j = inw(ioaddr + AXNET_DATAPORT);
249 dev->dev_addr[i] = j & 0xff;
250 dev->dev_addr[i+1] = j >> 8;
255 /*======================================================================
257 axnet_config() is scheduled to run after a CARD_INSERTION event
258 is received, to configure the PCMCIA socket, and to make the
259 ethernet device available to the system.
261 ======================================================================*/
263 #define CS_CHECK(fn, ret) \
264 do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)
266 static int try_io_port(dev_link_t *link)
269 if (link->io.NumPorts1 == 32) {
270 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
271 if (link->io.NumPorts2 > 0) {
272 /* for master/slave multifunction cards */
273 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
274 link->irq.Attributes =
275 IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
278 /* This should be two 16-port windows */
279 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
280 link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
282 if (link->io.BasePort1 == 0) {
283 link->io.IOAddrLines = 16;
284 for (j = 0; j < 0x400; j += 0x20) {
285 link->io.BasePort1 = j ^ 0x300;
286 link->io.BasePort2 = (j ^ 0x300) + 0x10;
287 ret = pcmcia_request_io(link->handle, &link->io);
288 if (ret == CS_SUCCESS) return ret;
292 return pcmcia_request_io(link->handle, &link->io);
296 static void axnet_config(dev_link_t *link)
298 client_handle_t handle = link->handle;
299 struct net_device *dev = link->priv;
300 axnet_dev_t *info = PRIV(dev);
303 int i, j, last_ret, last_fn;
307 DEBUG(0, "axnet_config(0x%p)\n", link);
309 tuple.Attributes = 0;
310 tuple.TupleData = (cisdata_t *)buf;
311 tuple.TupleDataMax = sizeof(buf);
312 tuple.TupleOffset = 0;
313 tuple.DesiredTuple = CISTPL_CONFIG;
314 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
315 CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
316 CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
317 link->conf.ConfigBase = parse.config.base;
318 /* don't trust the CIS on this; Linksys got it wrong */
319 link->conf.Present = 0x63;
322 link->state |= DEV_CONFIG;
324 /* Look up current Vcc */
325 CS_CHECK(GetConfigurationInfo, pcmcia_get_configuration_info(handle, &conf));
326 link->conf.Vcc = conf.Vcc;
328 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
329 tuple.Attributes = 0;
330 CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
331 while (last_ret == CS_SUCCESS) {
332 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
333 cistpl_io_t *io = &(parse.cftable_entry.io);
335 if (pcmcia_get_tuple_data(handle, &tuple) != 0 ||
336 pcmcia_parse_tuple(handle, &tuple, &parse) != 0 ||
337 cfg->index == 0 || cfg->io.nwin == 0)
340 link->conf.ConfigIndex = 0x05;
341 /* For multifunction cards, by convention, we configure the
342 network function with window 0, and serial with window 1 */
344 i = (io->win[1].len > io->win[0].len);
345 link->io.BasePort2 = io->win[1-i].base;
346 link->io.NumPorts2 = io->win[1-i].len;
348 i = link->io.NumPorts2 = 0;
350 link->io.BasePort1 = io->win[i].base;
351 link->io.NumPorts1 = io->win[i].len;
352 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
353 if (link->io.NumPorts1 + link->io.NumPorts2 >= 32) {
354 last_ret = try_io_port(link);
355 if (last_ret == CS_SUCCESS) break;
358 last_ret = pcmcia_get_next_tuple(handle, &tuple);
360 if (last_ret != CS_SUCCESS) {
361 cs_error(handle, RequestIO, last_ret);
365 CS_CHECK(RequestIRQ, pcmcia_request_irq(handle, &link->irq));
367 if (link->io.NumPorts2 == 8) {
368 link->conf.Attributes |= CONF_ENABLE_SPKR;
369 link->conf.Status = CCSR_AUDIO_ENA;
372 CS_CHECK(RequestConfiguration, pcmcia_request_configuration(handle, &link->conf));
373 dev->irq = link->irq.AssignedIRQ;
374 dev->base_addr = link->io.BasePort1;
376 if (!get_prom(link)) {
377 printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n");
378 printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n");
382 ei_status.name = "AX88190";
383 ei_status.word16 = 1;
384 ei_status.tx_start_page = AXNET_START_PG;
385 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
386 ei_status.stop_page = AXNET_STOP_PG;
387 ei_status.reset_8390 = &axnet_reset_8390;
388 ei_status.get_8390_hdr = &get_8390_hdr;
389 ei_status.block_input = &block_input;
390 ei_status.block_output = &block_output;
392 if (inb(dev->base_addr + AXNET_TEST) != 0)
393 info->flags |= IS_AX88790;
395 info->flags |= IS_AX88190;
397 if (info->flags & IS_AX88790)
398 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
400 for (i = 0; i < 32; i++) {
401 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
402 if ((j != 0) && (j != 0xffff)) break;
405 /* Maybe PHY is in power down mode. (PPD_SET = 1)
406 Bit 2 of CCSR is active low. */
408 conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 };
409 pcmcia_access_configuration_register(link->handle, ®);
410 for (i = 0; i < 32; i++) {
411 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
412 if ((j != 0) && (j != 0xffff)) break;
416 info->phy_id = (i < 32) ? i : -1;
417 link->dev = &info->node;
418 link->state &= ~DEV_CONFIG_PENDING;
419 SET_NETDEV_DEV(dev, &handle_to_dev(handle));
421 if (register_netdev(dev) != 0) {
422 printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n");
427 strcpy(info->node.dev_name, dev->name);
429 printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, hw_addr ",
430 dev->name, ((info->flags & IS_AX88790) ? 7 : 1),
431 dev->base_addr, dev->irq);
432 for (i = 0; i < 6; i++)
433 printk("%02X%s", dev->dev_addr[i], ((i<5) ? ":" : "\n"));
434 if (info->phy_id != -1) {
435 DEBUG(0, " MII transceiver at index %d, status %x.\n", info->phy_id, j);
437 printk(KERN_NOTICE " No MII transceivers found!\n");
442 cs_error(link->handle, last_fn, last_ret);
445 link->state &= ~DEV_CONFIG_PENDING;
449 /*======================================================================
451 After a card is removed, axnet_release() will unregister the net
452 device, and release the PCMCIA configuration. If the device is
453 still open, this will be postponed until it is closed.
455 ======================================================================*/
457 static void axnet_release(dev_link_t *link)
459 DEBUG(0, "axnet_release(0x%p)\n", link);
461 pcmcia_release_configuration(link->handle);
462 pcmcia_release_io(link->handle, &link->io);
463 pcmcia_release_irq(link->handle, &link->irq);
465 link->state &= ~DEV_CONFIG;
468 static int axnet_suspend(struct pcmcia_device *p_dev)
470 dev_link_t *link = dev_to_instance(p_dev);
471 struct net_device *dev = link->priv;
473 link->state |= DEV_SUSPEND;
474 if (link->state & DEV_CONFIG) {
476 netif_device_detach(dev);
477 pcmcia_release_configuration(link->handle);
483 static int axnet_resume(struct pcmcia_device *p_dev)
485 dev_link_t *link = dev_to_instance(p_dev);
486 struct net_device *dev = link->priv;
488 link->state &= ~DEV_SUSPEND;
489 if (link->state & DEV_CONFIG) {
490 pcmcia_request_configuration(link->handle, &link->conf);
492 axnet_reset_8390(dev);
493 AX88190_init(dev, 1);
494 netif_device_attach(dev);
502 /*======================================================================
504 MII interface support
506 ======================================================================*/
508 #define MDIO_SHIFT_CLK 0x01
509 #define MDIO_DATA_WRITE0 0x00
510 #define MDIO_DATA_WRITE1 0x08
511 #define MDIO_DATA_READ 0x04
512 #define MDIO_MASK 0x0f
513 #define MDIO_ENB_IN 0x02
515 static void mdio_sync(kio_addr_t addr)
518 for (bits = 0; bits < 32; bits++) {
519 outb_p(MDIO_DATA_WRITE1, addr);
520 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
524 static int mdio_read(kio_addr_t addr, int phy_id, int loc)
526 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
530 for (i = 14; i >= 0; i--) {
531 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
533 outb_p(dat | MDIO_SHIFT_CLK, addr);
535 for (i = 19; i > 0; i--) {
536 outb_p(MDIO_ENB_IN, addr);
537 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
538 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
540 return (retval>>1) & 0xffff;
543 static void mdio_write(kio_addr_t addr, int phy_id, int loc, int value)
545 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
549 for (i = 31; i >= 0; i--) {
550 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
552 outb_p(dat | MDIO_SHIFT_CLK, addr);
554 for (i = 1; i >= 0; i--) {
555 outb_p(MDIO_ENB_IN, addr);
556 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
560 /*====================================================================*/
562 static int axnet_open(struct net_device *dev)
564 axnet_dev_t *info = PRIV(dev);
565 dev_link_t *link = &info->link;
567 DEBUG(2, "axnet_open('%s')\n", dev->name);
574 request_irq(dev->irq, ei_irq_wrapper, SA_SHIRQ, "axnet_cs", dev);
576 info->link_status = 0x00;
577 init_timer(&info->watchdog);
578 info->watchdog.function = &ei_watchdog;
579 info->watchdog.data = (u_long)dev;
580 info->watchdog.expires = jiffies + HZ;
581 add_timer(&info->watchdog);
586 /*====================================================================*/
588 static int axnet_close(struct net_device *dev)
590 axnet_dev_t *info = PRIV(dev);
591 dev_link_t *link = &info->link;
593 DEBUG(2, "axnet_close('%s')\n", dev->name);
596 free_irq(dev->irq, dev);
599 netif_stop_queue(dev);
600 del_timer_sync(&info->watchdog);
605 /*======================================================================
607 Hard reset the card. This used to pause for the same period that
608 a 8390 reset command required, but that shouldn't be necessary.
610 ======================================================================*/
612 static void axnet_reset_8390(struct net_device *dev)
614 kio_addr_t nic_base = dev->base_addr;
617 ei_status.txing = ei_status.dmaing = 0;
619 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
621 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
623 for (i = 0; i < 100; i++) {
624 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
628 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
631 printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n",
634 } /* axnet_reset_8390 */
636 /*====================================================================*/
638 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs)
640 struct net_device *dev = dev_id;
641 PRIV(dev)->stale = 0;
642 return ax_interrupt(irq, dev_id, regs);
645 static void ei_watchdog(u_long arg)
647 struct net_device *dev = (struct net_device *)(arg);
648 axnet_dev_t *info = PRIV(dev);
649 kio_addr_t nic_base = dev->base_addr;
650 kio_addr_t mii_addr = nic_base + AXNET_MII_EEP;
653 if (!netif_device_present(dev)) goto reschedule;
655 /* Check for pending interrupt with expired latency timer: with
656 this, we can limp along even if the interrupt is blocked */
657 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
658 if (!info->fast_poll)
659 printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
660 ei_irq_wrapper(dev->irq, dev, NULL);
661 info->fast_poll = HZ;
663 if (info->fast_poll) {
665 info->watchdog.expires = jiffies + 1;
666 add_timer(&info->watchdog);
670 if (info->phy_id < 0)
672 link = mdio_read(mii_addr, info->phy_id, 1);
673 if (!link || (link == 0xffff)) {
674 printk(KERN_INFO "%s: MII is missing!\n", dev->name);
680 if (link != info->link_status) {
681 u_short p = mdio_read(mii_addr, info->phy_id, 5);
682 printk(KERN_INFO "%s: %s link beat\n", dev->name,
683 (link) ? "found" : "lost");
685 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
687 printk(KERN_INFO "%s: autonegotiation complete: "
688 "%sbaseT-%cD selected\n", dev->name,
689 ((p & 0x0180) ? "100" : "10"),
690 ((p & 0x0140) ? 'F' : 'H'));
692 printk(KERN_INFO "%s: link partner did not autonegotiate\n",
694 AX88190_init(dev, 1);
696 info->link_status = link;
700 info->watchdog.expires = jiffies + HZ;
701 add_timer(&info->watchdog);
704 static void netdev_get_drvinfo(struct net_device *dev,
705 struct ethtool_drvinfo *info)
707 strcpy(info->driver, "axnet_cs");
710 static struct ethtool_ops netdev_ethtool_ops = {
711 .get_drvinfo = netdev_get_drvinfo,
714 /*====================================================================*/
716 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
718 axnet_dev_t *info = PRIV(dev);
719 u16 *data = (u16 *)&rq->ifr_ifru;
720 kio_addr_t mii_addr = dev->base_addr + AXNET_MII_EEP;
723 data[0] = info->phy_id;
724 case SIOCGMIIREG: /* Read MII PHY register. */
725 data[3] = mdio_read(mii_addr, data[0], data[1] & 0x1f);
727 case SIOCSMIIREG: /* Write MII PHY register. */
728 if (!capable(CAP_NET_ADMIN))
730 mdio_write(mii_addr, data[0], data[1] & 0x1f, data[2]);
736 /*====================================================================*/
738 static void get_8390_hdr(struct net_device *dev,
739 struct e8390_pkt_hdr *hdr,
742 kio_addr_t nic_base = dev->base_addr;
744 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
745 outb_p(ring_page, nic_base + EN0_RSARHI);
746 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
748 insw(nic_base + AXNET_DATAPORT, hdr,
749 sizeof(struct e8390_pkt_hdr)>>1);
750 /* Fix for big endian systems */
751 hdr->count = le16_to_cpu(hdr->count);
755 /*====================================================================*/
757 static void block_input(struct net_device *dev, int count,
758 struct sk_buff *skb, int ring_offset)
760 kio_addr_t nic_base = dev->base_addr;
761 int xfer_count = count;
762 char *buf = skb->data;
765 if ((ei_debug > 4) && (count != 4))
766 printk(KERN_DEBUG "%s: [bi=%d]\n", dev->name, count+4);
768 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
769 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
770 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
772 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
774 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
778 /*====================================================================*/
780 static void block_output(struct net_device *dev, int count,
781 const u_char *buf, const int start_page)
783 kio_addr_t nic_base = dev->base_addr;
787 printk(KERN_DEBUG "%s: [bo=%d]\n", dev->name, count);
790 /* Round the count up for word writes. Do we need to do this?
791 What effect will an odd byte count have on the 8390?
792 I should check someday. */
796 outb_p(0x00, nic_base + EN0_RSARLO);
797 outb_p(start_page, nic_base + EN0_RSARHI);
798 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
799 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
802 static struct pcmcia_device_id axnet_ids[] = {
803 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
804 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
805 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
806 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
807 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
808 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
809 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
810 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
811 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
812 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
813 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
814 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
815 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
816 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
817 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
818 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
819 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
820 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
821 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
822 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
823 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
824 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
825 /* this is not specific enough */
826 /* PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202), */
829 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
831 static struct pcmcia_driver axnet_cs_driver = {
832 .owner = THIS_MODULE,
836 .probe = axnet_attach,
837 .remove = axnet_detach,
838 .id_table = axnet_ids,
839 .suspend = axnet_suspend,
840 .resume = axnet_resume,
843 static int __init init_axnet_cs(void)
845 return pcmcia_register_driver(&axnet_cs_driver);
848 static void __exit exit_axnet_cs(void)
850 pcmcia_unregister_driver(&axnet_cs_driver);
853 module_init(init_axnet_cs);
854 module_exit(exit_axnet_cs);
856 /*====================================================================*/
858 /* 8390.c: A general NS8390 ethernet driver core for linux. */
860 Written 1992-94 by Donald Becker.
862 Copyright 1993 United States Government as represented by the
863 Director, National Security Agency.
865 This software may be used and distributed according to the terms
866 of the GNU General Public License, incorporated herein by reference.
868 The author may be reached as becker@scyld.com, or C/O
869 Scyld Computing Corporation
870 410 Severn Ave., Suite 210
873 This is the chip-specific code for many 8390-based ethernet adaptors.
874 This is not a complete driver, it must be combined with board-specific
875 code such as ne.c, wd.c, 3c503.c, etc.
877 Seeing how at least eight drivers use this code, (not counting the
878 PCMCIA ones either) it is easy to break some card by what seems like
879 a simple innocent change. Please contact me or Donald if you think
880 you have found something that needs changing. -- PG
884 Paul Gortmaker : remove set_bit lock, other cleanups.
885 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
886 ei_block_input() for eth_io_copy_and_sum().
887 Paul Gortmaker : exchange static int ei_pingpong for a #define,
888 also add better Tx error handling.
889 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
890 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
891 Paul Gortmaker : tweak ANK's above multicast changes a bit.
892 Paul Gortmaker : update packet statistics for v2.1.x
893 Alan Cox : support arbitary stupid port mappings on the
894 68K Macintosh. Support >16bit I/O spaces
895 Paul Gortmaker : add kmod support for auto-loading of the 8390
896 module by all drivers that require it.
897 Alan Cox : Spinlocking work, added 'BUG_83C690'
898 Paul Gortmaker : Separate out Tx timeout code from Tx path.
901 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
905 static const char *version_8390 =
906 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n";
908 #include <linux/bitops.h>
910 #include <linux/fcntl.h>
911 #include <linux/in.h>
912 #include <linux/interrupt.h>
914 #include <linux/etherdevice.h>
918 /* These are the operational function interfaces to board-specific
920 void reset_8390(struct net_device *dev)
921 Resets the board associated with DEV, including a hardware reset of
922 the 8390. This is only called when there is a transmit timeout, and
923 it is always followed by 8390_init().
924 void block_output(struct net_device *dev, int count, const unsigned char *buf,
926 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
927 "page" value uses the 8390's 256-byte pages.
928 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
929 Read the 4 byte, page aligned 8390 header. *If* there is a
930 subsequent read, it will be of the rest of the packet.
931 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
932 Read COUNT bytes from the packet buffer into the skb data area. Start
933 reading from RING_OFFSET, the address as the 8390 sees it. This will always
934 follow the read of the 8390 header.
936 #define ei_reset_8390 (ei_local->reset_8390)
937 #define ei_block_output (ei_local->block_output)
938 #define ei_block_input (ei_local->block_input)
939 #define ei_get_8390_hdr (ei_local->get_8390_hdr)
941 /* use 0 for production, 1 for verification, >2 for debug */
946 /* Index to functions. */
947 static void ei_tx_intr(struct net_device *dev);
948 static void ei_tx_err(struct net_device *dev);
949 static void ei_tx_timeout(struct net_device *dev);
950 static void ei_receive(struct net_device *dev);
951 static void ei_rx_overrun(struct net_device *dev);
953 /* Routines generic to NS8390-based boards. */
954 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
956 static void set_multicast_list(struct net_device *dev);
957 static void do_set_multicast_list(struct net_device *dev);
960 * SMP and the 8390 setup.
962 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
963 * a page register that controls bank and packet buffer access. We guard
964 * this with ei_local->page_lock. Nobody should assume or set the page other
965 * than zero when the lock is not held. Lock holders must restore page 0
966 * before unlocking. Even pure readers must take the lock to protect in
969 * To make life difficult the chip can also be very slow. We therefore can't
970 * just use spinlocks. For the longer lockups we disable the irq the device
971 * sits on and hold the lock. We must hold the lock because there is a dual
972 * processor case other than interrupts (get stats/set multicast list in
973 * parallel with each other and transmit).
975 * Note: in theory we can just disable the irq on the card _but_ there is
976 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
977 * enter lock, take the queued irq. So we waddle instead of flying.
979 * Finally by special arrangement for the purpose of being generally
980 * annoying the transmit function is called bh atomic. That places
981 * restrictions on the user context callers as disable_irq won't save
986 * ax_open - Open/initialize the board.
987 * @dev: network device to initialize
989 * This routine goes all-out, setting everything
990 * up anew at each open, even though many of these registers should only
991 * need to be set once at boot.
993 static int ax_open(struct net_device *dev)
996 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
998 #ifdef HAVE_TX_TIMEOUT
999 /* The card I/O part of the driver (e.g. 3c503) can hook a Tx timeout
1000 wrapper that does e.g. media check & then calls ei_tx_timeout. */
1001 if (dev->tx_timeout == NULL)
1002 dev->tx_timeout = ei_tx_timeout;
1003 if (dev->watchdog_timeo <= 0)
1004 dev->watchdog_timeo = TX_TIMEOUT;
1008 * Grab the page lock so we own the register set, then call
1009 * the init function.
1012 spin_lock_irqsave(&ei_local->page_lock, flags);
1013 AX88190_init(dev, 1);
1014 /* Set the flag before we drop the lock, That way the IRQ arrives
1015 after its set and we get no silly warnings */
1016 netif_start_queue(dev);
1017 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1018 ei_local->irqlock = 0;
1022 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
1025 * ax_close - shut down network device
1026 * @dev: network device to close
1028 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
1030 int ax_close(struct net_device *dev)
1032 unsigned long flags;
1035 * Hold the page lock during close
1038 spin_lock_irqsave(&dev_lock(dev), flags);
1039 AX88190_init(dev, 0);
1040 spin_unlock_irqrestore(&dev_lock(dev), flags);
1041 netif_stop_queue(dev);
1046 * ei_tx_timeout - handle transmit time out condition
1047 * @dev: network device which has apparently fallen asleep
1049 * Called by kernel when device never acknowledges a transmit has
1050 * completed (or failed) - i.e. never posted a Tx related interrupt.
1053 void ei_tx_timeout(struct net_device *dev)
1055 long e8390_base = dev->base_addr;
1056 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1057 int txsr, isr, tickssofar = jiffies - dev->trans_start;
1058 unsigned long flags;
1060 ei_local->stat.tx_errors++;
1062 spin_lock_irqsave(&ei_local->page_lock, flags);
1063 txsr = inb(e8390_base+EN0_TSR);
1064 isr = inb(e8390_base+EN0_ISR);
1065 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1067 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
1068 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
1069 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
1071 if (!isr && !ei_local->stat.tx_packets)
1073 /* The 8390 probably hasn't gotten on the cable yet. */
1074 ei_local->interface_num ^= 1; /* Try a different xcvr. */
1077 /* Ugly but a reset can be slow, yet must be protected */
1079 disable_irq_nosync(dev->irq);
1080 spin_lock(&ei_local->page_lock);
1082 /* Try to restart the card. Perhaps the user has fixed something. */
1084 AX88190_init(dev, 1);
1086 spin_unlock(&ei_local->page_lock);
1087 enable_irq(dev->irq);
1088 netif_wake_queue(dev);
1092 * ei_start_xmit - begin packet transmission
1093 * @skb: packet to be sent
1094 * @dev: network device to which packet is sent
1096 * Sends a packet to an 8390 network device.
1099 static int ei_start_xmit(struct sk_buff *skb, struct net_device *dev)
1101 long e8390_base = dev->base_addr;
1102 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1103 int length, send_length, output_page;
1104 unsigned long flags;
1105 u8 packet[ETH_ZLEN];
1107 netif_stop_queue(dev);
1111 /* Mask interrupts from the ethercard.
1112 SMP: We have to grab the lock here otherwise the IRQ handler
1113 on another CPU can flip window and race the IRQ mask set. We end
1114 up trashing the mcast filter not disabling irqs if we don't lock */
1116 spin_lock_irqsave(&ei_local->page_lock, flags);
1117 outb_p(0x00, e8390_base + EN0_IMR);
1118 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1121 * Slow phase with lock held.
1124 disable_irq_nosync(dev->irq);
1126 spin_lock(&ei_local->page_lock);
1128 ei_local->irqlock = 1;
1130 send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
1133 * We have two Tx slots available for use. Find the first free
1134 * slot, and then perform some sanity checks. With two Tx bufs,
1135 * you get very close to transmitting back-to-back packets. With
1136 * only one Tx buf, the transmitter sits idle while you reload the
1137 * card, leaving a substantial gap between each transmitted packet.
1140 if (ei_local->tx1 == 0)
1142 output_page = ei_local->tx_start_page;
1143 ei_local->tx1 = send_length;
1144 if (ei_debug && ei_local->tx2 > 0)
1145 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
1146 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
1148 else if (ei_local->tx2 == 0)
1150 output_page = ei_local->tx_start_page + TX_PAGES/2;
1151 ei_local->tx2 = send_length;
1152 if (ei_debug && ei_local->tx1 > 0)
1153 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
1154 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
1157 { /* We should never get here. */
1159 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1160 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
1161 ei_local->irqlock = 0;
1162 netif_stop_queue(dev);
1163 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1164 spin_unlock(&ei_local->page_lock);
1165 enable_irq(dev->irq);
1166 ei_local->stat.tx_errors++;
1171 * Okay, now upload the packet and trigger a send if the transmitter
1172 * isn't already sending. If it is busy, the interrupt handler will
1173 * trigger the send later, upon receiving a Tx done interrupt.
1176 if (length == skb->len)
1177 ei_block_output(dev, length, skb->data, output_page);
1179 memset(packet, 0, ETH_ZLEN);
1180 memcpy(packet, skb->data, skb->len);
1181 ei_block_output(dev, length, packet, output_page);
1184 if (! ei_local->txing)
1186 ei_local->txing = 1;
1187 NS8390_trigger_send(dev, send_length, output_page);
1188 dev->trans_start = jiffies;
1189 if (output_page == ei_local->tx_start_page)
1192 ei_local->lasttx = -1;
1197 ei_local->lasttx = -2;
1200 else ei_local->txqueue++;
1202 if (ei_local->tx1 && ei_local->tx2)
1203 netif_stop_queue(dev);
1205 netif_start_queue(dev);
1207 /* Turn 8390 interrupts back on. */
1208 ei_local->irqlock = 0;
1209 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1211 spin_unlock(&ei_local->page_lock);
1212 enable_irq(dev->irq);
1214 dev_kfree_skb (skb);
1215 ei_local->stat.tx_bytes += send_length;
1221 * ax_interrupt - handle the interrupts from an 8390
1222 * @irq: interrupt number
1223 * @dev_id: a pointer to the net_device
1226 * Handle the ether interface interrupts. We pull packets from
1227 * the 8390 via the card specific functions and fire them at the networking
1228 * stack. We also handle transmit completions and wake the transmit path if
1229 * necessary. We also update the counters and do other housekeeping as
1233 static irqreturn_t ax_interrupt(int irq, void *dev_id, struct pt_regs * regs)
1235 struct net_device *dev = dev_id;
1237 int interrupts, nr_serviced = 0, i;
1238 struct ei_device *ei_local;
1243 printk ("net_interrupt(): irq %d for unknown device.\n", irq);
1247 e8390_base = dev->base_addr;
1248 ei_local = (struct ei_device *) netdev_priv(dev);
1251 * Protect the irq test too.
1254 spin_lock(&ei_local->page_lock);
1256 if (ei_local->irqlock)
1258 #if 1 /* This might just be an interrupt for a PCI device sharing this line */
1259 /* The "irqlock" check is only for testing. */
1260 printk(ei_local->irqlock
1261 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
1262 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
1263 dev->name, inb_p(e8390_base + EN0_ISR),
1264 inb_p(e8390_base + EN0_IMR));
1266 spin_unlock(&ei_local->page_lock);
1271 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
1272 inb_p(e8390_base + EN0_ISR));
1274 outb_p(0x00, e8390_base + EN0_ISR);
1275 ei_local->irqlock = 1;
1277 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1278 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
1279 && ++nr_serviced < MAX_SERVICE)
1281 if (!netif_running(dev) || (interrupts == 0xff)) {
1283 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
1284 outb_p(interrupts, e8390_base + EN0_ISR);
1290 /* AX88190 bug fix. */
1291 outb_p(interrupts, e8390_base + EN0_ISR);
1292 for (i = 0; i < 10; i++) {
1293 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1295 outb_p(0, e8390_base + EN0_ISR);
1296 outb_p(interrupts, e8390_base + EN0_ISR);
1298 if (interrupts & ENISR_OVER)
1300 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1302 /* Got a good (?) packet. */
1305 /* Push the next to-transmit packet through. */
1306 if (interrupts & ENISR_TX)
1308 else if (interrupts & ENISR_TX_ERR)
1311 if (interrupts & ENISR_COUNTERS)
1313 ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1314 ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1315 ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1319 if (interrupts && ei_debug)
1322 if (nr_serviced >= MAX_SERVICE)
1324 /* 0xFF is valid for a card removal */
1325 if(interrupts!=0xFF)
1326 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
1327 dev->name, interrupts);
1328 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1330 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
1331 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1335 /* Turn 8390 interrupts back on. */
1336 ei_local->irqlock = 0;
1337 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1339 spin_unlock(&ei_local->page_lock);
1340 return IRQ_RETVAL(handled);
1344 * ei_tx_err - handle transmitter error
1345 * @dev: network device which threw the exception
1347 * A transmitter error has happened. Most likely excess collisions (which
1348 * is a fairly normal condition). If the error is one where the Tx will
1349 * have been aborted, we try and send another one right away, instead of
1350 * letting the failed packet sit and collect dust in the Tx buffer. This
1351 * is a much better solution as it avoids kernel based Tx timeouts, and
1352 * an unnecessary card reset.
1354 * Called with lock held.
1357 static void ei_tx_err(struct net_device *dev)
1359 long e8390_base = dev->base_addr;
1360 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1361 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1362 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1364 #ifdef VERBOSE_ERROR_DUMP
1365 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
1366 if (txsr & ENTSR_ABT)
1367 printk("excess-collisions ");
1368 if (txsr & ENTSR_ND)
1369 printk("non-deferral ");
1370 if (txsr & ENTSR_CRS)
1371 printk("lost-carrier ");
1372 if (txsr & ENTSR_FU)
1373 printk("FIFO-underrun ");
1374 if (txsr & ENTSR_CDH)
1375 printk("lost-heartbeat ");
1383 ei_local->stat.tx_errors++;
1384 if (txsr & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
1385 if (txsr & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
1386 if (txsr & ENTSR_OWC) ei_local->stat.tx_window_errors++;
1391 * ei_tx_intr - transmit interrupt handler
1392 * @dev: network device for which tx intr is handled
1394 * We have finished a transmit: check for errors and then trigger the next
1395 * packet to be sent. Called with lock held.
1398 static void ei_tx_intr(struct net_device *dev)
1400 long e8390_base = dev->base_addr;
1401 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1402 int status = inb(e8390_base + EN0_TSR);
1405 * There are two Tx buffers, see which one finished, and trigger
1406 * the send of another one if it exists.
1408 ei_local->txqueue--;
1410 if (ei_local->tx1 < 0)
1412 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1413 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
1414 ei_local->name, ei_local->lasttx, ei_local->tx1);
1416 if (ei_local->tx2 > 0)
1418 ei_local->txing = 1;
1419 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1420 dev->trans_start = jiffies;
1422 ei_local->lasttx = 2;
1424 else ei_local->lasttx = 20, ei_local->txing = 0;
1426 else if (ei_local->tx2 < 0)
1428 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1429 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
1430 ei_local->name, ei_local->lasttx, ei_local->tx2);
1432 if (ei_local->tx1 > 0)
1434 ei_local->txing = 1;
1435 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1436 dev->trans_start = jiffies;
1438 ei_local->lasttx = 1;
1441 ei_local->lasttx = 10, ei_local->txing = 0;
1443 // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
1444 // dev->name, ei_local->lasttx);
1446 /* Minimize Tx latency: update the statistics after we restart TXing. */
1447 if (status & ENTSR_COL)
1448 ei_local->stat.collisions++;
1449 if (status & ENTSR_PTX)
1450 ei_local->stat.tx_packets++;
1453 ei_local->stat.tx_errors++;
1454 if (status & ENTSR_ABT)
1456 ei_local->stat.tx_aborted_errors++;
1457 ei_local->stat.collisions += 16;
1459 if (status & ENTSR_CRS)
1460 ei_local->stat.tx_carrier_errors++;
1461 if (status & ENTSR_FU)
1462 ei_local->stat.tx_fifo_errors++;
1463 if (status & ENTSR_CDH)
1464 ei_local->stat.tx_heartbeat_errors++;
1465 if (status & ENTSR_OWC)
1466 ei_local->stat.tx_window_errors++;
1468 netif_wake_queue(dev);
1472 * ei_receive - receive some packets
1473 * @dev: network device with which receive will be run
1475 * We have a good packet(s), get it/them out of the buffers.
1476 * Called with lock held.
1479 static void ei_receive(struct net_device *dev)
1481 long e8390_base = dev->base_addr;
1482 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1483 unsigned char rxing_page, this_frame, next_frame;
1484 unsigned short current_offset;
1485 int rx_pkt_count = 0;
1486 struct e8390_pkt_hdr rx_frame;
1488 while (++rx_pkt_count < 10)
1490 int pkt_len, pkt_stat;
1492 /* Get the rx page (incoming packet pointer). */
1493 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1495 /* Remove one frame from the ring. Boundary is always a page behind. */
1496 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1497 if (this_frame >= ei_local->stop_page)
1498 this_frame = ei_local->rx_start_page;
1500 /* Someday we'll omit the previous, iff we never get this message.
1501 (There is at least one clone claimed to have a problem.)
1503 Keep quiet if it looks like a card removal. One problem here
1504 is that some clones crash in roughly the same way.
1506 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1507 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
1508 dev->name, this_frame, ei_local->current_page);
1510 if (this_frame == rxing_page) /* Read all the frames? */
1511 break; /* Done for now */
1513 current_offset = this_frame << 8;
1514 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1516 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1517 pkt_stat = rx_frame.status;
1519 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1521 if (pkt_len < 60 || pkt_len > 1518)
1524 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
1525 dev->name, rx_frame.count, rx_frame.status,
1527 ei_local->stat.rx_errors++;
1528 ei_local->stat.rx_length_errors++;
1530 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1532 struct sk_buff *skb;
1534 skb = dev_alloc_skb(pkt_len+2);
1538 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
1539 dev->name, pkt_len);
1540 ei_local->stat.rx_dropped++;
1545 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1547 skb_put(skb, pkt_len); /* Make room */
1548 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1549 skb->protocol=eth_type_trans(skb,dev);
1551 dev->last_rx = jiffies;
1552 ei_local->stat.rx_packets++;
1553 ei_local->stat.rx_bytes += pkt_len;
1554 if (pkt_stat & ENRSR_PHY)
1555 ei_local->stat.multicast++;
1561 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1562 dev->name, rx_frame.status, rx_frame.next,
1564 ei_local->stat.rx_errors++;
1565 /* NB: The NIC counts CRC, frame and missed errors. */
1566 if (pkt_stat & ENRSR_FO)
1567 ei_local->stat.rx_fifo_errors++;
1569 next_frame = rx_frame.next;
1571 /* This _should_ never happen: it's here for avoiding bad clones. */
1572 if (next_frame >= ei_local->stop_page) {
1573 printk("%s: next frame inconsistency, %#2x\n", dev->name,
1575 next_frame = ei_local->rx_start_page;
1577 ei_local->current_page = next_frame;
1578 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1585 * ei_rx_overrun - handle receiver overrun
1586 * @dev: network device which threw exception
1588 * We have a receiver overrun: we have to kick the 8390 to get it started
1589 * again. Problem is that you have to kick it exactly as NS prescribes in
1590 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1591 * This includes causing "the NIC to defer indefinitely when it is stopped
1592 * on a busy network." Ugh.
1593 * Called with lock held. Don't call this with the interrupts off or your
1594 * computer will hate you - it takes 10ms or so.
1597 static void ei_rx_overrun(struct net_device *dev)
1599 axnet_dev_t *info = (axnet_dev_t *)dev;
1600 long e8390_base = dev->base_addr;
1601 unsigned char was_txing, must_resend = 0;
1602 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1605 * Record whether a Tx was in progress and then issue the
1608 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1609 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1612 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
1613 ei_local->stat.rx_over_errors++;
1616 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1617 * Early datasheets said to poll the reset bit, but now they say that
1618 * it "is not a reliable indicator and subsequently should be ignored."
1619 * We wait at least 10ms.
1625 * Reset RBCR[01] back to zero as per magic incantation.
1627 outb_p(0x00, e8390_base+EN0_RCNTLO);
1628 outb_p(0x00, e8390_base+EN0_RCNTHI);
1631 * See if any Tx was interrupted or not. According to NS, this
1632 * step is vital, and skipping it will cause no end of havoc.
1637 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1643 * Have to enter loopback mode and then restart the NIC before
1644 * you are allowed to slurp packets up off the ring.
1646 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1647 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1650 * Clear the Rx ring of all the debris, and ack the interrupt.
1655 * Leave loopback mode, and resend any packet that got stopped.
1657 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1659 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1663 * Collect the stats. This is called unlocked and from several contexts.
1666 static struct net_device_stats *get_stats(struct net_device *dev)
1668 long ioaddr = dev->base_addr;
1669 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1670 unsigned long flags;
1672 /* If the card is stopped, just return the present stats. */
1673 if (!netif_running(dev))
1674 return &ei_local->stat;
1676 spin_lock_irqsave(&ei_local->page_lock,flags);
1677 /* Read the counter registers, assuming we are in page 0. */
1678 ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1679 ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1680 ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1681 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1683 return &ei_local->stat;
1687 * Form the 64 bit 8390 multicast table from the linked list of addresses
1688 * associated with this dev structure.
1691 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1693 struct dev_mc_list *dmi;
1696 for (dmi=dev->mc_list; dmi; dmi=dmi->next) {
1698 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
1700 * The 8390 uses the 6 most significant bits of the
1701 * CRC to index the multicast table.
1703 bits[crc>>29] |= (1<<((crc>>26)&7));
1708 * do_set_multicast_list - set/clear multicast filter
1709 * @dev: net device for which multicast filter is adjusted
1711 * Set or clear the multicast filter for this adaptor.
1712 * Must be called with lock held.
1715 static void do_set_multicast_list(struct net_device *dev)
1717 long e8390_base = dev->base_addr;
1719 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
1721 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1722 memset(ei_local->mcfilter, 0, 8);
1724 make_mc_bits(ei_local->mcfilter, dev);
1726 /* set to accept-all */
1727 memset(ei_local->mcfilter, 0xFF, 8);
1731 * DP8390 manuals don't specify any magic sequence for altering
1732 * the multicast regs on an already running card. To be safe, we
1733 * ensure multicast mode is off prior to loading up the new hash
1734 * table. If this proves to be not enough, we can always resort
1735 * to stopping the NIC, loading the table and then restarting.
1738 if (netif_running(dev))
1739 outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
1741 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1742 for(i = 0; i < 8; i++)
1744 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1746 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1748 if(dev->flags&IFF_PROMISC)
1749 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1750 else if(dev->flags&IFF_ALLMULTI || dev->mc_list)
1751 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1753 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1757 * Called without lock held. This is invoked from user context and may
1758 * be parallel to just about everything else. Its also fairly quick and
1759 * not called too often. Must protect against both bh and irq users
1762 static void set_multicast_list(struct net_device *dev)
1764 unsigned long flags;
1766 spin_lock_irqsave(&dev_lock(dev), flags);
1767 do_set_multicast_list(dev);
1768 spin_unlock_irqrestore(&dev_lock(dev), flags);
1772 * axdev_setup - init rest of 8390 device struct
1773 * @dev: network device structure to init
1775 * Initialize the rest of the 8390 device structure. Do NOT __init
1776 * this, as it is used by 8390 based modular drivers too.
1779 static void axdev_setup(struct net_device *dev)
1781 struct ei_device *ei_local;
1783 printk(version_8390);
1785 SET_MODULE_OWNER(dev);
1788 ei_local = (struct ei_device *)netdev_priv(dev);
1789 spin_lock_init(&ei_local->page_lock);
1791 dev->hard_start_xmit = &ei_start_xmit;
1792 dev->get_stats = get_stats;
1793 dev->set_multicast_list = &set_multicast_list;
1798 /* This page of functions should be 8390 generic */
1799 /* Follow National Semi's recommendations for initializing the "NIC". */
1802 * AX88190_init - initialize 8390 hardware
1803 * @dev: network device to initialize
1804 * @startp: boolean. non-zero value to initiate chip processing
1806 * Must be called with lock held.
1809 static void AX88190_init(struct net_device *dev, int startp)
1811 axnet_dev_t *info = PRIV(dev);
1812 long e8390_base = dev->base_addr;
1813 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1815 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1817 if(sizeof(struct e8390_pkt_hdr)!=4)
1818 panic("8390.c: header struct mispacked\n");
1819 /* Follow National Semi's recommendations for initing the DP83902. */
1820 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1821 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1822 /* Clear the remote byte count registers. */
1823 outb_p(0x00, e8390_base + EN0_RCNTLO);
1824 outb_p(0x00, e8390_base + EN0_RCNTHI);
1825 /* Set to monitor and loopback mode -- this is vital!. */
1826 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1827 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1828 /* Set the transmit page and receive ring. */
1829 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1830 ei_local->tx1 = ei_local->tx2 = 0;
1831 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1832 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1833 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1834 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1835 /* Clear the pending interrupts and mask. */
1836 outb_p(0xFF, e8390_base + EN0_ISR);
1837 outb_p(0x00, e8390_base + EN0_IMR);
1839 /* Copy the station address into the DS8390 registers. */
1841 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1842 for(i = 0; i < 6; i++)
1844 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1845 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1846 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1849 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1850 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1852 netif_start_queue(dev);
1853 ei_local->tx1 = ei_local->tx2 = 0;
1854 ei_local->txing = 0;
1858 outb_p(0xff, e8390_base + EN0_ISR);
1859 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1860 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1861 outb_p(E8390_TXCONFIG | info->duplex_flag,
1862 e8390_base + EN0_TXCR); /* xmit on. */
1863 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1864 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1865 do_set_multicast_list(dev); /* (re)load the mcast table */
1869 /* Trigger a transmit start, assuming the length is valid.
1870 Always called with the page lock held */
1872 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1875 long e8390_base = dev->base_addr;
1876 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1878 if (inb_p(e8390_base) & E8390_TRANS)
1880 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1884 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1885 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1886 outb_p(start_page, e8390_base + EN0_TPSR);
1887 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);