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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/ptrace.h>
33 #include <linux/string.h>
34 #include <linux/timer.h>
35 #include <linux/delay.h>
36 #include <linux/spinlock.h>
37 #include <linux/netdevice.h>
38 #include <linux/etherdevice.h>
39 #include <linux/crc32.h>
40 #include <linux/mii.h>
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 /*====================================================================*/
79 static int axnet_config(struct pcmcia_device *link);
80 static void axnet_release(struct pcmcia_device *link);
81 static int axnet_open(struct net_device *dev);
82 static int axnet_close(struct net_device *dev);
83 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
84 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
85 struct net_device *dev);
86 static struct net_device_stats *get_stats(struct net_device *dev);
87 static void set_multicast_list(struct net_device *dev);
88 static void axnet_tx_timeout(struct net_device *dev);
89 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
90 static void ei_watchdog(u_long arg);
91 static void axnet_reset_8390(struct net_device *dev);
93 static int mdio_read(unsigned int addr, int phy_id, int loc);
94 static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
96 static void get_8390_hdr(struct net_device *,
97 struct e8390_pkt_hdr *, int);
98 static void block_input(struct net_device *dev, int count,
99 struct sk_buff *skb, int ring_offset);
100 static void block_output(struct net_device *dev, int count,
101 const u_char *buf, const int start_page);
103 static void axnet_detach(struct pcmcia_device *p_dev);
105 static void AX88190_init(struct net_device *dev, int startp);
106 static int ax_open(struct net_device *dev);
107 static int ax_close(struct net_device *dev);
108 static irqreturn_t ax_interrupt(int irq, void *dev_id);
110 /*====================================================================*/
112 typedef struct axnet_dev_t {
113 struct pcmcia_device *p_dev;
115 struct timer_list watchdog;
116 int stale, fast_poll;
123 static inline axnet_dev_t *PRIV(struct net_device *dev)
125 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
129 static const struct net_device_ops axnet_netdev_ops = {
130 .ndo_open = axnet_open,
131 .ndo_stop = axnet_close,
132 .ndo_do_ioctl = axnet_ioctl,
133 .ndo_start_xmit = axnet_start_xmit,
134 .ndo_tx_timeout = axnet_tx_timeout,
135 .ndo_get_stats = get_stats,
136 .ndo_set_multicast_list = set_multicast_list,
137 .ndo_change_mtu = eth_change_mtu,
138 .ndo_set_mac_address = eth_mac_addr,
139 .ndo_validate_addr = eth_validate_addr,
142 static int axnet_probe(struct pcmcia_device *link)
145 struct net_device *dev;
146 struct ei_device *ei_local;
148 dev_dbg(&link->dev, "axnet_attach()\n");
150 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
154 ei_local = netdev_priv(dev);
155 spin_lock_init(&ei_local->page_lock);
160 link->config_flags |= CONF_ENABLE_IRQ;
162 dev->netdev_ops = &axnet_netdev_ops;
164 dev->watchdog_timeo = TX_TIMEOUT;
166 return axnet_config(link);
169 static void axnet_detach(struct pcmcia_device *link)
171 struct net_device *dev = link->priv;
173 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
175 unregister_netdev(dev);
182 /*======================================================================
184 This probes for a card's hardware address by reading the PROM.
186 ======================================================================*/
188 static int get_prom(struct pcmcia_device *link)
190 struct net_device *dev = link->priv;
191 unsigned int ioaddr = dev->base_addr;
194 /* This is based on drivers/net/ne.c */
196 u_char value, offset;
198 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
199 {0x01, EN0_DCFG}, /* Set word-wide access. */
200 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
202 {0x00, EN0_IMR}, /* Mask completion irq. */
204 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
205 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
208 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
210 {E8390_RREAD+E8390_START, E8390_CMD},
213 /* Not much of a test, but the alternatives are messy */
214 if (link->config_base != 0x03c0)
217 axnet_reset_8390(dev);
220 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
221 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
223 for (i = 0; i < 6; i += 2) {
224 j = inw(ioaddr + AXNET_DATAPORT);
225 dev->dev_addr[i] = j & 0xff;
226 dev->dev_addr[i+1] = j >> 8;
231 static int try_io_port(struct pcmcia_device *link)
234 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
235 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
236 if (link->resource[0]->end == 32) {
237 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
238 /* for master/slave multifunction cards */
239 if (link->resource[1]->end > 0)
240 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
242 /* This should be two 16-port windows */
243 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
244 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
246 if (link->resource[0]->start == 0) {
247 for (j = 0; j < 0x400; j += 0x20) {
248 link->resource[0]->start = j ^ 0x300;
249 link->resource[1]->start = (j ^ 0x300) + 0x10;
251 ret = pcmcia_request_io(link);
257 return pcmcia_request_io(link);
261 static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
263 if (p_dev->config_index == 0)
266 p_dev->config_index = 0x05;
267 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
270 return try_io_port(p_dev);
273 static int axnet_config(struct pcmcia_device *link)
275 struct net_device *dev = link->priv;
276 axnet_dev_t *info = PRIV(dev);
279 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
281 /* don't trust the CIS on this; Linksys got it wrong */
282 link->config_regs = 0x63;
283 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
284 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
291 if (resource_size(link->resource[1]) == 8)
292 link->config_flags |= CONF_ENABLE_SPKR;
294 ret = pcmcia_enable_device(link);
298 dev->irq = link->irq;
299 dev->base_addr = link->resource[0]->start;
301 if (!get_prom(link)) {
302 pr_notice("this is not an AX88190 card!\n");
303 pr_notice("use pcnet_cs instead.\n");
307 ei_status.name = "AX88190";
308 ei_status.word16 = 1;
309 ei_status.tx_start_page = AXNET_START_PG;
310 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
311 ei_status.stop_page = AXNET_STOP_PG;
312 ei_status.reset_8390 = axnet_reset_8390;
313 ei_status.get_8390_hdr = get_8390_hdr;
314 ei_status.block_input = block_input;
315 ei_status.block_output = block_output;
317 if (inb(dev->base_addr + AXNET_TEST) != 0)
318 info->flags |= IS_AX88790;
320 info->flags |= IS_AX88190;
322 if (info->flags & IS_AX88790)
323 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
325 for (i = 0; i < 32; i++) {
326 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
327 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
328 if (j == j2) continue;
329 if ((j != 0) && (j != 0xffff)) break;
332 /* Maybe PHY is in power down mode. (PPD_SET = 1)
333 Bit 2 of CCSR is active low. */
335 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
336 for (i = 0; i < 32; i++) {
337 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
338 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
339 if (j == j2) continue;
340 if ((j != 0) && (j != 0xffff)) break;
344 info->phy_id = (i < 32) ? i : -1;
345 SET_NETDEV_DEV(dev, &link->dev);
347 if (register_netdev(dev) != 0) {
348 pr_notice("register_netdev() failed\n");
352 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
353 ((info->flags & IS_AX88790) ? 7 : 1),
354 dev->base_addr, dev->irq, dev->dev_addr);
355 if (info->phy_id != -1) {
356 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
359 netdev_notice(dev, " No MII transceivers found!\n");
368 static void axnet_release(struct pcmcia_device *link)
370 pcmcia_disable_device(link);
373 static int axnet_suspend(struct pcmcia_device *link)
375 struct net_device *dev = link->priv;
378 netif_device_detach(dev);
383 static int axnet_resume(struct pcmcia_device *link)
385 struct net_device *dev = link->priv;
388 axnet_reset_8390(dev);
389 AX88190_init(dev, 1);
390 netif_device_attach(dev);
397 /*======================================================================
399 MII interface support
401 ======================================================================*/
403 #define MDIO_SHIFT_CLK 0x01
404 #define MDIO_DATA_WRITE0 0x00
405 #define MDIO_DATA_WRITE1 0x08
406 #define MDIO_DATA_READ 0x04
407 #define MDIO_MASK 0x0f
408 #define MDIO_ENB_IN 0x02
410 static void mdio_sync(unsigned int addr)
413 for (bits = 0; bits < 32; bits++) {
414 outb_p(MDIO_DATA_WRITE1, addr);
415 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
419 static int mdio_read(unsigned int addr, int phy_id, int loc)
421 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
425 for (i = 14; i >= 0; i--) {
426 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
428 outb_p(dat | MDIO_SHIFT_CLK, addr);
430 for (i = 19; i > 0; i--) {
431 outb_p(MDIO_ENB_IN, addr);
432 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
433 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
435 return (retval>>1) & 0xffff;
438 static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
440 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
444 for (i = 31; i >= 0; i--) {
445 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
447 outb_p(dat | MDIO_SHIFT_CLK, addr);
449 for (i = 1; i >= 0; i--) {
450 outb_p(MDIO_ENB_IN, addr);
451 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
455 /*====================================================================*/
457 static int axnet_open(struct net_device *dev)
460 axnet_dev_t *info = PRIV(dev);
461 struct pcmcia_device *link = info->p_dev;
462 unsigned int nic_base = dev->base_addr;
464 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
466 if (!pcmcia_dev_present(link))
469 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
470 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
476 info->link_status = 0x00;
477 init_timer(&info->watchdog);
478 info->watchdog.function = ei_watchdog;
479 info->watchdog.data = (u_long)dev;
480 info->watchdog.expires = jiffies + HZ;
481 add_timer(&info->watchdog);
486 /*====================================================================*/
488 static int axnet_close(struct net_device *dev)
490 axnet_dev_t *info = PRIV(dev);
491 struct pcmcia_device *link = info->p_dev;
493 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
496 free_irq(dev->irq, dev);
499 netif_stop_queue(dev);
500 del_timer_sync(&info->watchdog);
505 /*======================================================================
507 Hard reset the card. This used to pause for the same period that
508 a 8390 reset command required, but that shouldn't be necessary.
510 ======================================================================*/
512 static void axnet_reset_8390(struct net_device *dev)
514 unsigned int nic_base = dev->base_addr;
517 ei_status.txing = ei_status.dmaing = 0;
519 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
521 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
523 for (i = 0; i < 100; i++) {
524 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
528 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
531 netdev_err(dev, "axnet_reset_8390() did not complete\n");
533 } /* axnet_reset_8390 */
535 /*====================================================================*/
537 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
539 struct net_device *dev = dev_id;
540 PRIV(dev)->stale = 0;
541 return ax_interrupt(irq, dev_id);
544 static void ei_watchdog(u_long arg)
546 struct net_device *dev = (struct net_device *)(arg);
547 axnet_dev_t *info = PRIV(dev);
548 unsigned int nic_base = dev->base_addr;
549 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
552 if (!netif_device_present(dev)) goto reschedule;
554 /* Check for pending interrupt with expired latency timer: with
555 this, we can limp along even if the interrupt is blocked */
556 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
557 if (!info->fast_poll)
558 netdev_info(dev, "interrupt(s) dropped!\n");
559 ei_irq_wrapper(dev->irq, dev);
560 info->fast_poll = HZ;
562 if (info->fast_poll) {
564 info->watchdog.expires = jiffies + 1;
565 add_timer(&info->watchdog);
569 if (info->phy_id < 0)
571 link = mdio_read(mii_addr, info->phy_id, 1);
572 if (!link || (link == 0xffff)) {
573 netdev_info(dev, "MII is missing!\n");
579 if (link != info->link_status) {
580 u_short p = mdio_read(mii_addr, info->phy_id, 5);
581 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
583 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
585 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
586 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
588 netdev_info(dev, "link partner did not autonegotiate\n");
589 AX88190_init(dev, 1);
591 info->link_status = link;
595 info->watchdog.expires = jiffies + HZ;
596 add_timer(&info->watchdog);
599 /*====================================================================*/
601 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
603 axnet_dev_t *info = PRIV(dev);
604 struct mii_ioctl_data *data = if_mii(rq);
605 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
608 data->phy_id = info->phy_id;
609 case SIOCGMIIREG: /* Read MII PHY register. */
610 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
612 case SIOCSMIIREG: /* Write MII PHY register. */
613 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
619 /*====================================================================*/
621 static void get_8390_hdr(struct net_device *dev,
622 struct e8390_pkt_hdr *hdr,
625 unsigned int nic_base = dev->base_addr;
627 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
628 outb_p(ring_page, nic_base + EN0_RSARHI);
629 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
631 insw(nic_base + AXNET_DATAPORT, hdr,
632 sizeof(struct e8390_pkt_hdr)>>1);
633 /* Fix for big endian systems */
634 hdr->count = le16_to_cpu(hdr->count);
638 /*====================================================================*/
640 static void block_input(struct net_device *dev, int count,
641 struct sk_buff *skb, int ring_offset)
643 unsigned int nic_base = dev->base_addr;
644 int xfer_count = count;
645 char *buf = skb->data;
647 if ((ei_debug > 4) && (count != 4))
648 pr_debug("%s: [bi=%d]\n", dev->name, count+4);
649 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
650 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
651 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
653 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
655 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
659 /*====================================================================*/
661 static void block_output(struct net_device *dev, int count,
662 const u_char *buf, const int start_page)
664 unsigned int nic_base = dev->base_addr;
666 pr_debug("%s: [bo=%d]\n", dev->name, count);
668 /* Round the count up for word writes. Do we need to do this?
669 What effect will an odd byte count have on the 8390?
670 I should check someday. */
674 outb_p(0x00, nic_base + EN0_RSARLO);
675 outb_p(start_page, nic_base + EN0_RSARHI);
676 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
677 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
680 static struct pcmcia_device_id axnet_ids[] = {
681 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
682 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
683 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
684 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
685 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
686 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
687 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
688 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
689 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
690 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
691 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
692 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
693 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
694 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
695 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
696 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
697 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
698 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
699 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
700 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
701 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
702 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
703 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
704 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
705 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
706 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
707 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
710 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
712 static struct pcmcia_driver axnet_cs_driver = {
713 .owner = THIS_MODULE,
715 .probe = axnet_probe,
716 .remove = axnet_detach,
717 .id_table = axnet_ids,
718 .suspend = axnet_suspend,
719 .resume = axnet_resume,
722 static int __init init_axnet_cs(void)
724 return pcmcia_register_driver(&axnet_cs_driver);
727 static void __exit exit_axnet_cs(void)
729 pcmcia_unregister_driver(&axnet_cs_driver);
732 module_init(init_axnet_cs);
733 module_exit(exit_axnet_cs);
735 /*====================================================================*/
737 /* 8390.c: A general NS8390 ethernet driver core for linux. */
739 Written 1992-94 by Donald Becker.
741 Copyright 1993 United States Government as represented by the
742 Director, National Security Agency.
744 This software may be used and distributed according to the terms
745 of the GNU General Public License, incorporated herein by reference.
747 The author may be reached as becker@scyld.com, or C/O
748 Scyld Computing Corporation
749 410 Severn Ave., Suite 210
752 This is the chip-specific code for many 8390-based ethernet adaptors.
753 This is not a complete driver, it must be combined with board-specific
754 code such as ne.c, wd.c, 3c503.c, etc.
756 Seeing how at least eight drivers use this code, (not counting the
757 PCMCIA ones either) it is easy to break some card by what seems like
758 a simple innocent change. Please contact me or Donald if you think
759 you have found something that needs changing. -- PG
763 Paul Gortmaker : remove set_bit lock, other cleanups.
764 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
765 ei_block_input() for eth_io_copy_and_sum().
766 Paul Gortmaker : exchange static int ei_pingpong for a #define,
767 also add better Tx error handling.
768 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
769 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
770 Paul Gortmaker : tweak ANK's above multicast changes a bit.
771 Paul Gortmaker : update packet statistics for v2.1.x
772 Alan Cox : support arbitary stupid port mappings on the
773 68K Macintosh. Support >16bit I/O spaces
774 Paul Gortmaker : add kmod support for auto-loading of the 8390
775 module by all drivers that require it.
776 Alan Cox : Spinlocking work, added 'BUG_83C690'
777 Paul Gortmaker : Separate out Tx timeout code from Tx path.
780 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
784 #include <linux/bitops.h>
786 #include <linux/fcntl.h>
787 #include <linux/in.h>
788 #include <linux/interrupt.h>
792 /* These are the operational function interfaces to board-specific
794 void reset_8390(struct net_device *dev)
795 Resets the board associated with DEV, including a hardware reset of
796 the 8390. This is only called when there is a transmit timeout, and
797 it is always followed by 8390_init().
798 void block_output(struct net_device *dev, int count, const unsigned char *buf,
800 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
801 "page" value uses the 8390's 256-byte pages.
802 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
803 Read the 4 byte, page aligned 8390 header. *If* there is a
804 subsequent read, it will be of the rest of the packet.
805 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
806 Read COUNT bytes from the packet buffer into the skb data area. Start
807 reading from RING_OFFSET, the address as the 8390 sees it. This will always
808 follow the read of the 8390 header.
810 #define ei_reset_8390 (ei_local->reset_8390)
811 #define ei_block_output (ei_local->block_output)
812 #define ei_block_input (ei_local->block_input)
813 #define ei_get_8390_hdr (ei_local->get_8390_hdr)
815 /* use 0 for production, 1 for verification, >2 for debug */
820 /* Index to functions. */
821 static void ei_tx_intr(struct net_device *dev);
822 static void ei_tx_err(struct net_device *dev);
823 static void ei_receive(struct net_device *dev);
824 static void ei_rx_overrun(struct net_device *dev);
826 /* Routines generic to NS8390-based boards. */
827 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
829 static void do_set_multicast_list(struct net_device *dev);
832 * SMP and the 8390 setup.
834 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
835 * a page register that controls bank and packet buffer access. We guard
836 * this with ei_local->page_lock. Nobody should assume or set the page other
837 * than zero when the lock is not held. Lock holders must restore page 0
838 * before unlocking. Even pure readers must take the lock to protect in
841 * To make life difficult the chip can also be very slow. We therefore can't
842 * just use spinlocks. For the longer lockups we disable the irq the device
843 * sits on and hold the lock. We must hold the lock because there is a dual
844 * processor case other than interrupts (get stats/set multicast list in
845 * parallel with each other and transmit).
847 * Note: in theory we can just disable the irq on the card _but_ there is
848 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
849 * enter lock, take the queued irq. So we waddle instead of flying.
851 * Finally by special arrangement for the purpose of being generally
852 * annoying the transmit function is called bh atomic. That places
853 * restrictions on the user context callers as disable_irq won't save
858 * ax_open - Open/initialize the board.
859 * @dev: network device to initialize
861 * This routine goes all-out, setting everything
862 * up anew at each open, even though many of these registers should only
863 * need to be set once at boot.
865 static int ax_open(struct net_device *dev)
868 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
871 * Grab the page lock so we own the register set, then call
875 spin_lock_irqsave(&ei_local->page_lock, flags);
876 AX88190_init(dev, 1);
877 /* Set the flag before we drop the lock, That way the IRQ arrives
878 after its set and we get no silly warnings */
879 netif_start_queue(dev);
880 spin_unlock_irqrestore(&ei_local->page_lock, flags);
881 ei_local->irqlock = 0;
885 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
888 * ax_close - shut down network device
889 * @dev: network device to close
891 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
893 static int ax_close(struct net_device *dev)
898 * Hold the page lock during close
901 spin_lock_irqsave(&dev_lock(dev), flags);
902 AX88190_init(dev, 0);
903 spin_unlock_irqrestore(&dev_lock(dev), flags);
904 netif_stop_queue(dev);
909 * axnet_tx_timeout - handle transmit time out condition
910 * @dev: network device which has apparently fallen asleep
912 * Called by kernel when device never acknowledges a transmit has
913 * completed (or failed) - i.e. never posted a Tx related interrupt.
916 static void axnet_tx_timeout(struct net_device *dev)
918 long e8390_base = dev->base_addr;
919 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
920 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
923 dev->stats.tx_errors++;
925 spin_lock_irqsave(&ei_local->page_lock, flags);
926 txsr = inb(e8390_base+EN0_TSR);
927 isr = inb(e8390_base+EN0_ISR);
928 spin_unlock_irqrestore(&ei_local->page_lock, flags);
930 netdev_printk(KERN_DEBUG, dev,
931 "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
932 (txsr & ENTSR_ABT) ? "excess collisions." :
933 (isr) ? "lost interrupt?" : "cable problem?",
934 txsr, isr, tickssofar);
936 if (!isr && !dev->stats.tx_packets)
938 /* The 8390 probably hasn't gotten on the cable yet. */
939 ei_local->interface_num ^= 1; /* Try a different xcvr. */
942 /* Ugly but a reset can be slow, yet must be protected */
944 spin_lock_irqsave(&ei_local->page_lock, flags);
946 /* Try to restart the card. Perhaps the user has fixed something. */
948 AX88190_init(dev, 1);
950 spin_unlock_irqrestore(&ei_local->page_lock, flags);
951 netif_wake_queue(dev);
955 * axnet_start_xmit - begin packet transmission
956 * @skb: packet to be sent
957 * @dev: network device to which packet is sent
959 * Sends a packet to an 8390 network device.
962 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
963 struct net_device *dev)
965 long e8390_base = dev->base_addr;
966 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
967 int length, send_length, output_page;
971 netif_stop_queue(dev);
975 /* Mask interrupts from the ethercard.
976 SMP: We have to grab the lock here otherwise the IRQ handler
977 on another CPU can flip window and race the IRQ mask set. We end
978 up trashing the mcast filter not disabling irqs if we don't lock */
980 spin_lock_irqsave(&ei_local->page_lock, flags);
981 outb_p(0x00, e8390_base + EN0_IMR);
984 * Slow phase with lock held.
987 ei_local->irqlock = 1;
989 send_length = max(length, ETH_ZLEN);
992 * We have two Tx slots available for use. Find the first free
993 * slot, and then perform some sanity checks. With two Tx bufs,
994 * you get very close to transmitting back-to-back packets. With
995 * only one Tx buf, the transmitter sits idle while you reload the
996 * card, leaving a substantial gap between each transmitted packet.
999 if (ei_local->tx1 == 0)
1001 output_page = ei_local->tx_start_page;
1002 ei_local->tx1 = send_length;
1003 if (ei_debug && ei_local->tx2 > 0)
1004 netdev_printk(KERN_DEBUG, dev,
1005 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1006 ei_local->tx2, ei_local->lasttx,
1009 else if (ei_local->tx2 == 0)
1011 output_page = ei_local->tx_start_page + TX_PAGES/2;
1012 ei_local->tx2 = send_length;
1013 if (ei_debug && ei_local->tx1 > 0)
1014 netdev_printk(KERN_DEBUG, dev,
1015 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1016 ei_local->tx1, ei_local->lasttx,
1020 { /* We should never get here. */
1022 netdev_printk(KERN_DEBUG, dev,
1023 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1024 ei_local->tx1, ei_local->tx2,
1026 ei_local->irqlock = 0;
1027 netif_stop_queue(dev);
1028 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1029 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1030 dev->stats.tx_errors++;
1031 return NETDEV_TX_BUSY;
1035 * Okay, now upload the packet and trigger a send if the transmitter
1036 * isn't already sending. If it is busy, the interrupt handler will
1037 * trigger the send later, upon receiving a Tx done interrupt.
1040 if (length == skb->len)
1041 ei_block_output(dev, length, skb->data, output_page);
1043 memset(packet, 0, ETH_ZLEN);
1044 skb_copy_from_linear_data(skb, packet, skb->len);
1045 ei_block_output(dev, length, packet, output_page);
1048 if (! ei_local->txing)
1050 ei_local->txing = 1;
1051 NS8390_trigger_send(dev, send_length, output_page);
1052 dev->trans_start = jiffies;
1053 if (output_page == ei_local->tx_start_page)
1056 ei_local->lasttx = -1;
1061 ei_local->lasttx = -2;
1064 else ei_local->txqueue++;
1066 if (ei_local->tx1 && ei_local->tx2)
1067 netif_stop_queue(dev);
1069 netif_start_queue(dev);
1071 /* Turn 8390 interrupts back on. */
1072 ei_local->irqlock = 0;
1073 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1075 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1077 dev_kfree_skb (skb);
1078 dev->stats.tx_bytes += send_length;
1080 return NETDEV_TX_OK;
1084 * ax_interrupt - handle the interrupts from an 8390
1085 * @irq: interrupt number
1086 * @dev_id: a pointer to the net_device
1088 * Handle the ether interface interrupts. We pull packets from
1089 * the 8390 via the card specific functions and fire them at the networking
1090 * stack. We also handle transmit completions and wake the transmit path if
1091 * necessary. We also update the counters and do other housekeeping as
1095 static irqreturn_t ax_interrupt(int irq, void *dev_id)
1097 struct net_device *dev = dev_id;
1099 int interrupts, nr_serviced = 0, i;
1100 struct ei_device *ei_local;
1102 unsigned long flags;
1104 e8390_base = dev->base_addr;
1105 ei_local = netdev_priv(dev);
1108 * Protect the irq test too.
1111 spin_lock_irqsave(&ei_local->page_lock, flags);
1113 if (ei_local->irqlock) {
1114 #if 1 /* This might just be an interrupt for a PCI device sharing this line */
1116 /* The "irqlock" check is only for testing. */
1117 if (ei_local->irqlock)
1118 msg = "Interrupted while interrupts are masked!";
1120 msg = "Reentering the interrupt handler!";
1121 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1123 inb_p(e8390_base + EN0_ISR),
1124 inb_p(e8390_base + EN0_IMR));
1126 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1131 netdev_printk(KERN_DEBUG, dev, "interrupt(isr=%#2.2x)\n",
1132 inb_p(e8390_base + EN0_ISR));
1134 outb_p(0x00, e8390_base + EN0_ISR);
1135 ei_local->irqlock = 1;
1137 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1138 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1139 ++nr_serviced < MAX_SERVICE)
1141 if (!netif_running(dev) || (interrupts == 0xff)) {
1144 "interrupt from stopped card\n");
1145 outb_p(interrupts, e8390_base + EN0_ISR);
1151 /* AX88190 bug fix. */
1152 outb_p(interrupts, e8390_base + EN0_ISR);
1153 for (i = 0; i < 10; i++) {
1154 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1156 outb_p(0, e8390_base + EN0_ISR);
1157 outb_p(interrupts, e8390_base + EN0_ISR);
1159 if (interrupts & ENISR_OVER)
1161 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1163 /* Got a good (?) packet. */
1166 /* Push the next to-transmit packet through. */
1167 if (interrupts & ENISR_TX)
1169 else if (interrupts & ENISR_TX_ERR)
1172 if (interrupts & ENISR_COUNTERS)
1174 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1175 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1176 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1180 if (interrupts && ei_debug > 3)
1183 if (nr_serviced >= MAX_SERVICE)
1185 /* 0xFF is valid for a card removal */
1186 if(interrupts!=0xFF)
1187 netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n",
1189 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1191 netdev_warn(dev, "unknown interrupt %#2x\n",
1193 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1197 /* Turn 8390 interrupts back on. */
1198 ei_local->irqlock = 0;
1199 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1201 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1202 return IRQ_RETVAL(handled);
1206 * ei_tx_err - handle transmitter error
1207 * @dev: network device which threw the exception
1209 * A transmitter error has happened. Most likely excess collisions (which
1210 * is a fairly normal condition). If the error is one where the Tx will
1211 * have been aborted, we try and send another one right away, instead of
1212 * letting the failed packet sit and collect dust in the Tx buffer. This
1213 * is a much better solution as it avoids kernel based Tx timeouts, and
1214 * an unnecessary card reset.
1216 * Called with lock held.
1219 static void ei_tx_err(struct net_device *dev)
1221 long e8390_base = dev->base_addr;
1222 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1223 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1225 #ifdef VERBOSE_ERROR_DUMP
1226 netdev_printk(KERN_DEBUG, dev,
1227 "transmitter error (%#2x):", txsr);
1228 if (txsr & ENTSR_ABT)
1229 pr_cont(" excess-collisions");
1230 if (txsr & ENTSR_ND)
1231 pr_cont(" non-deferral");
1232 if (txsr & ENTSR_CRS)
1233 pr_cont(" lost-carrier");
1234 if (txsr & ENTSR_FU)
1235 pr_cont(" FIFO-underrun");
1236 if (txsr & ENTSR_CDH)
1237 pr_cont(" lost-heartbeat");
1245 dev->stats.tx_errors++;
1246 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1247 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1248 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1253 * ei_tx_intr - transmit interrupt handler
1254 * @dev: network device for which tx intr is handled
1256 * We have finished a transmit: check for errors and then trigger the next
1257 * packet to be sent. Called with lock held.
1260 static void ei_tx_intr(struct net_device *dev)
1262 long e8390_base = dev->base_addr;
1263 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1264 int status = inb(e8390_base + EN0_TSR);
1267 * There are two Tx buffers, see which one finished, and trigger
1268 * the send of another one if it exists.
1270 ei_local->txqueue--;
1272 if (ei_local->tx1 < 0)
1274 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1275 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1276 ei_local->name, ei_local->lasttx,
1279 if (ei_local->tx2 > 0)
1281 ei_local->txing = 1;
1282 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1283 dev->trans_start = jiffies;
1285 ei_local->lasttx = 2;
1287 else ei_local->lasttx = 20, ei_local->txing = 0;
1289 else if (ei_local->tx2 < 0)
1291 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1292 netdev_info(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1293 ei_local->name, ei_local->lasttx,
1296 if (ei_local->tx1 > 0)
1298 ei_local->txing = 1;
1299 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1300 dev->trans_start = jiffies;
1302 ei_local->lasttx = 1;
1305 ei_local->lasttx = 10, ei_local->txing = 0;
1308 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1309 // ei_local->lasttx);
1311 /* Minimize Tx latency: update the statistics after we restart TXing. */
1312 if (status & ENTSR_COL)
1313 dev->stats.collisions++;
1314 if (status & ENTSR_PTX)
1315 dev->stats.tx_packets++;
1318 dev->stats.tx_errors++;
1319 if (status & ENTSR_ABT)
1321 dev->stats.tx_aborted_errors++;
1322 dev->stats.collisions += 16;
1324 if (status & ENTSR_CRS)
1325 dev->stats.tx_carrier_errors++;
1326 if (status & ENTSR_FU)
1327 dev->stats.tx_fifo_errors++;
1328 if (status & ENTSR_CDH)
1329 dev->stats.tx_heartbeat_errors++;
1330 if (status & ENTSR_OWC)
1331 dev->stats.tx_window_errors++;
1333 netif_wake_queue(dev);
1337 * ei_receive - receive some packets
1338 * @dev: network device with which receive will be run
1340 * We have a good packet(s), get it/them out of the buffers.
1341 * Called with lock held.
1344 static void ei_receive(struct net_device *dev)
1346 long e8390_base = dev->base_addr;
1347 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1348 unsigned char rxing_page, this_frame, next_frame;
1349 unsigned short current_offset;
1350 int rx_pkt_count = 0;
1351 struct e8390_pkt_hdr rx_frame;
1353 while (++rx_pkt_count < 10)
1355 int pkt_len, pkt_stat;
1357 /* Get the rx page (incoming packet pointer). */
1358 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1360 /* Remove one frame from the ring. Boundary is always a page behind. */
1361 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1362 if (this_frame >= ei_local->stop_page)
1363 this_frame = ei_local->rx_start_page;
1365 /* Someday we'll omit the previous, iff we never get this message.
1366 (There is at least one clone claimed to have a problem.)
1368 Keep quiet if it looks like a card removal. One problem here
1369 is that some clones crash in roughly the same way.
1371 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1372 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1373 this_frame, ei_local->current_page);
1375 if (this_frame == rxing_page) /* Read all the frames? */
1376 break; /* Done for now */
1378 current_offset = this_frame << 8;
1379 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1381 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1382 pkt_stat = rx_frame.status;
1384 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1386 if (pkt_len < 60 || pkt_len > 1518)
1389 netdev_printk(KERN_DEBUG, dev,
1390 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1391 rx_frame.count, rx_frame.status,
1393 dev->stats.rx_errors++;
1394 dev->stats.rx_length_errors++;
1396 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1398 struct sk_buff *skb;
1400 skb = dev_alloc_skb(pkt_len+2);
1404 netdev_printk(KERN_DEBUG, dev,
1405 "Couldn't allocate a sk_buff of size %d\n",
1407 dev->stats.rx_dropped++;
1412 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1413 skb_put(skb, pkt_len); /* Make room */
1414 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1415 skb->protocol=eth_type_trans(skb,dev);
1417 dev->stats.rx_packets++;
1418 dev->stats.rx_bytes += pkt_len;
1419 if (pkt_stat & ENRSR_PHY)
1420 dev->stats.multicast++;
1426 netdev_printk(KERN_DEBUG, dev,
1427 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1428 rx_frame.status, rx_frame.next,
1430 dev->stats.rx_errors++;
1431 /* NB: The NIC counts CRC, frame and missed errors. */
1432 if (pkt_stat & ENRSR_FO)
1433 dev->stats.rx_fifo_errors++;
1435 next_frame = rx_frame.next;
1437 /* This _should_ never happen: it's here for avoiding bad clones. */
1438 if (next_frame >= ei_local->stop_page) {
1439 netdev_info(dev, "next frame inconsistency, %#2x\n",
1441 next_frame = ei_local->rx_start_page;
1443 ei_local->current_page = next_frame;
1444 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1449 * ei_rx_overrun - handle receiver overrun
1450 * @dev: network device which threw exception
1452 * We have a receiver overrun: we have to kick the 8390 to get it started
1453 * again. Problem is that you have to kick it exactly as NS prescribes in
1454 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1455 * This includes causing "the NIC to defer indefinitely when it is stopped
1456 * on a busy network." Ugh.
1457 * Called with lock held. Don't call this with the interrupts off or your
1458 * computer will hate you - it takes 10ms or so.
1461 static void ei_rx_overrun(struct net_device *dev)
1463 axnet_dev_t *info = PRIV(dev);
1464 long e8390_base = dev->base_addr;
1465 unsigned char was_txing, must_resend = 0;
1468 * Record whether a Tx was in progress and then issue the
1471 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1472 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1475 netdev_printk(KERN_DEBUG, dev, "Receiver overrun\n");
1476 dev->stats.rx_over_errors++;
1479 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1480 * Early datasheets said to poll the reset bit, but now they say that
1481 * it "is not a reliable indicator and subsequently should be ignored."
1482 * We wait at least 10ms.
1488 * Reset RBCR[01] back to zero as per magic incantation.
1490 outb_p(0x00, e8390_base+EN0_RCNTLO);
1491 outb_p(0x00, e8390_base+EN0_RCNTHI);
1494 * See if any Tx was interrupted or not. According to NS, this
1495 * step is vital, and skipping it will cause no end of havoc.
1500 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1506 * Have to enter loopback mode and then restart the NIC before
1507 * you are allowed to slurp packets up off the ring.
1509 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1510 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1513 * Clear the Rx ring of all the debris, and ack the interrupt.
1518 * Leave loopback mode, and resend any packet that got stopped.
1520 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1522 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1526 * Collect the stats. This is called unlocked and from several contexts.
1529 static struct net_device_stats *get_stats(struct net_device *dev)
1531 long ioaddr = dev->base_addr;
1532 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1533 unsigned long flags;
1535 /* If the card is stopped, just return the present stats. */
1536 if (!netif_running(dev))
1539 spin_lock_irqsave(&ei_local->page_lock,flags);
1540 /* Read the counter registers, assuming we are in page 0. */
1541 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1542 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1543 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1544 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1550 * Form the 64 bit 8390 multicast table from the linked list of addresses
1551 * associated with this dev structure.
1554 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1556 struct netdev_hw_addr *ha;
1559 netdev_for_each_mc_addr(ha, dev) {
1560 crc = ether_crc(ETH_ALEN, ha->addr);
1562 * The 8390 uses the 6 most significant bits of the
1563 * CRC to index the multicast table.
1565 bits[crc>>29] |= (1<<((crc>>26)&7));
1570 * do_set_multicast_list - set/clear multicast filter
1571 * @dev: net device for which multicast filter is adjusted
1573 * Set or clear the multicast filter for this adaptor.
1574 * Must be called with lock held.
1577 static void do_set_multicast_list(struct net_device *dev)
1579 long e8390_base = dev->base_addr;
1581 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
1583 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1584 memset(ei_local->mcfilter, 0, 8);
1585 if (!netdev_mc_empty(dev))
1586 make_mc_bits(ei_local->mcfilter, dev);
1588 /* set to accept-all */
1589 memset(ei_local->mcfilter, 0xFF, 8);
1592 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1593 for(i = 0; i < 8; i++)
1595 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1597 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1599 if(dev->flags&IFF_PROMISC)
1600 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1601 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1602 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1604 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1606 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1610 * Called without lock held. This is invoked from user context and may
1611 * be parallel to just about everything else. Its also fairly quick and
1612 * not called too often. Must protect against both bh and irq users
1615 static void set_multicast_list(struct net_device *dev)
1617 unsigned long flags;
1619 spin_lock_irqsave(&dev_lock(dev), flags);
1620 do_set_multicast_list(dev);
1621 spin_unlock_irqrestore(&dev_lock(dev), flags);
1624 /* This page of functions should be 8390 generic */
1625 /* Follow National Semi's recommendations for initializing the "NIC". */
1628 * AX88190_init - initialize 8390 hardware
1629 * @dev: network device to initialize
1630 * @startp: boolean. non-zero value to initiate chip processing
1632 * Must be called with lock held.
1635 static void AX88190_init(struct net_device *dev, int startp)
1637 axnet_dev_t *info = PRIV(dev);
1638 long e8390_base = dev->base_addr;
1639 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1641 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1643 if(sizeof(struct e8390_pkt_hdr)!=4)
1644 panic("8390.c: header struct mispacked\n");
1645 /* Follow National Semi's recommendations for initing the DP83902. */
1646 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1647 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1648 /* Clear the remote byte count registers. */
1649 outb_p(0x00, e8390_base + EN0_RCNTLO);
1650 outb_p(0x00, e8390_base + EN0_RCNTHI);
1651 /* Set to monitor and loopback mode -- this is vital!. */
1652 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1653 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1654 /* Set the transmit page and receive ring. */
1655 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1656 ei_local->tx1 = ei_local->tx2 = 0;
1657 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1658 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1659 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1660 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1661 /* Clear the pending interrupts and mask. */
1662 outb_p(0xFF, e8390_base + EN0_ISR);
1663 outb_p(0x00, e8390_base + EN0_IMR);
1665 /* Copy the station address into the DS8390 registers. */
1667 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1668 for(i = 0; i < 6; i++)
1670 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1671 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1672 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1675 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1676 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1678 netif_start_queue(dev);
1679 ei_local->tx1 = ei_local->tx2 = 0;
1680 ei_local->txing = 0;
1682 if (info->flags & IS_AX88790) /* select Internal PHY */
1683 outb(0x10, e8390_base + AXNET_GPIO);
1687 outb_p(0xff, e8390_base + EN0_ISR);
1688 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1689 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1690 outb_p(E8390_TXCONFIG | info->duplex_flag,
1691 e8390_base + EN0_TXCR); /* xmit on. */
1692 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1693 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1694 do_set_multicast_list(dev); /* (re)load the mcast table */
1698 /* Trigger a transmit start, assuming the length is valid.
1699 Always called with the page lock held */
1701 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1704 long e8390_base = dev->base_addr;
1705 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1707 if (inb_p(e8390_base) & E8390_TRANS)
1709 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1712 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1713 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1714 outb_p(start_page, e8390_base + EN0_TPSR);
1715 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);