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/byteorder.h>
50 #include <asm/uaccess.h>
52 #define AXNET_CMD 0x00
53 #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
54 #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
55 #define AXNET_MII_EEP 0x14 /* Offset of MII access port */
56 #define AXNET_TEST 0x15 /* Offset of TEST Register port */
57 #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
59 #define AXNET_START_PG 0x40 /* First page of TX buffer */
60 #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
62 #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
64 #define IS_AX88190 0x0001
65 #define IS_AX88790 0x0002
67 /*====================================================================*/
69 /* Module parameters */
71 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
72 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
73 MODULE_LICENSE("GPL");
76 /*====================================================================*/
78 static int axnet_config(struct pcmcia_device *link);
79 static void axnet_release(struct pcmcia_device *link);
80 static int axnet_open(struct net_device *dev);
81 static int axnet_close(struct net_device *dev);
82 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
83 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
84 struct net_device *dev);
85 static struct net_device_stats *get_stats(struct net_device *dev);
86 static void set_multicast_list(struct net_device *dev);
87 static void axnet_tx_timeout(struct net_device *dev);
88 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
89 static void ei_watchdog(u_long arg);
90 static void axnet_reset_8390(struct net_device *dev);
92 static int mdio_read(unsigned int addr, int phy_id, int loc);
93 static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
95 static void get_8390_hdr(struct net_device *,
96 struct e8390_pkt_hdr *, int);
97 static void block_input(struct net_device *dev, int count,
98 struct sk_buff *skb, int ring_offset);
99 static void block_output(struct net_device *dev, int count,
100 const u_char *buf, const int start_page);
102 static void axnet_detach(struct pcmcia_device *p_dev);
104 static void AX88190_init(struct net_device *dev, int startp);
105 static int ax_open(struct net_device *dev);
106 static int ax_close(struct net_device *dev);
107 static irqreturn_t ax_interrupt(int irq, void *dev_id);
108 static u32 axnet_msg_enable;
110 /*====================================================================*/
112 typedef struct axnet_dev_t {
113 struct pcmcia_device *p_dev;
115 struct timer_list watchdog;
116 int stale, fast_poll;
124 static inline axnet_dev_t *PRIV(struct net_device *dev)
126 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
130 static const struct net_device_ops axnet_netdev_ops = {
131 .ndo_open = axnet_open,
132 .ndo_stop = axnet_close,
133 .ndo_do_ioctl = axnet_ioctl,
134 .ndo_start_xmit = axnet_start_xmit,
135 .ndo_tx_timeout = axnet_tx_timeout,
136 .ndo_get_stats = get_stats,
137 .ndo_set_rx_mode = set_multicast_list,
138 .ndo_change_mtu = eth_change_mtu,
139 .ndo_set_mac_address = eth_mac_addr,
140 .ndo_validate_addr = eth_validate_addr,
143 static int axnet_probe(struct pcmcia_device *link)
146 struct net_device *dev;
147 struct ei_device *ei_local;
149 dev_dbg(&link->dev, "axnet_attach()\n");
151 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
155 ei_local = netdev_priv(dev);
156 ei_local->msg_enable = axnet_msg_enable;
157 spin_lock_init(&ei_local->page_lock);
162 link->config_flags |= CONF_ENABLE_IRQ;
164 dev->netdev_ops = &axnet_netdev_ops;
166 dev->watchdog_timeo = TX_TIMEOUT;
168 return axnet_config(link);
171 static void axnet_detach(struct pcmcia_device *link)
173 struct net_device *dev = link->priv;
175 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
177 unregister_netdev(dev);
184 /*======================================================================
186 This probes for a card's hardware address by reading the PROM.
188 ======================================================================*/
190 static int get_prom(struct pcmcia_device *link)
192 struct net_device *dev = link->priv;
193 unsigned int ioaddr = dev->base_addr;
196 /* This is based on drivers/net/ethernet/8390/ne.c */
198 u_char value, offset;
200 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
201 {0x01, EN0_DCFG}, /* Set word-wide access. */
202 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
204 {0x00, EN0_IMR}, /* Mask completion irq. */
206 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
207 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
210 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
212 {E8390_RREAD+E8390_START, E8390_CMD},
215 /* Not much of a test, but the alternatives are messy */
216 if (link->config_base != 0x03c0)
219 axnet_reset_8390(dev);
222 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
223 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
225 for (i = 0; i < 6; i += 2) {
226 j = inw(ioaddr + AXNET_DATAPORT);
227 dev->dev_addr[i] = j & 0xff;
228 dev->dev_addr[i+1] = j >> 8;
233 static int try_io_port(struct pcmcia_device *link)
236 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
237 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
238 if (link->resource[0]->end == 32) {
239 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
240 /* for master/slave multifunction cards */
241 if (link->resource[1]->end > 0)
242 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
244 /* This should be two 16-port windows */
245 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
246 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
248 if (link->resource[0]->start == 0) {
249 for (j = 0; j < 0x400; j += 0x20) {
250 link->resource[0]->start = j ^ 0x300;
251 link->resource[1]->start = (j ^ 0x300) + 0x10;
253 ret = pcmcia_request_io(link);
259 return pcmcia_request_io(link);
263 static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
265 if (p_dev->config_index == 0)
268 p_dev->config_index = 0x05;
269 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
272 return try_io_port(p_dev);
275 static int axnet_config(struct pcmcia_device *link)
277 struct net_device *dev = link->priv;
278 axnet_dev_t *info = PRIV(dev);
281 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
283 /* don't trust the CIS on this; Linksys got it wrong */
284 link->config_regs = 0x63;
285 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
286 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
293 if (resource_size(link->resource[1]) == 8)
294 link->config_flags |= CONF_ENABLE_SPKR;
296 ret = pcmcia_enable_device(link);
300 dev->irq = link->irq;
301 dev->base_addr = link->resource[0]->start;
303 if (!get_prom(link)) {
304 pr_notice("this is not an AX88190 card!\n");
305 pr_notice("use pcnet_cs instead.\n");
309 ei_status.name = "AX88190";
310 ei_status.word16 = 1;
311 ei_status.tx_start_page = AXNET_START_PG;
312 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
313 ei_status.stop_page = AXNET_STOP_PG;
314 ei_status.reset_8390 = axnet_reset_8390;
315 ei_status.get_8390_hdr = get_8390_hdr;
316 ei_status.block_input = block_input;
317 ei_status.block_output = block_output;
319 if (inb(dev->base_addr + AXNET_TEST) != 0)
320 info->flags |= IS_AX88790;
322 info->flags |= IS_AX88190;
324 if (info->flags & IS_AX88790)
325 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
327 info->active_low = 0;
329 for (i = 0; i < 32; i++) {
330 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
331 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
332 if (j == j2) continue;
333 if ((j != 0) && (j != 0xffff)) break;
337 /* Maybe PHY is in power down mode. (PPD_SET = 1)
338 Bit 2 of CCSR is active low. */
339 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
340 for (i = 0; i < 32; i++) {
341 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
342 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
343 if (j == j2) continue;
344 if ((j != 0) && (j != 0xffff)) {
345 info->active_low = 1;
351 info->phy_id = (i < 32) ? i : -1;
352 SET_NETDEV_DEV(dev, &link->dev);
354 if (register_netdev(dev) != 0) {
355 pr_notice("register_netdev() failed\n");
359 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
360 ((info->flags & IS_AX88790) ? 7 : 1),
361 dev->base_addr, dev->irq, dev->dev_addr);
362 if (info->phy_id != -1) {
363 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
366 netdev_notice(dev, " No MII transceivers found!\n");
375 static void axnet_release(struct pcmcia_device *link)
377 pcmcia_disable_device(link);
380 static int axnet_suspend(struct pcmcia_device *link)
382 struct net_device *dev = link->priv;
385 netif_device_detach(dev);
390 static int axnet_resume(struct pcmcia_device *link)
392 struct net_device *dev = link->priv;
393 axnet_dev_t *info = PRIV(dev);
396 if (info->active_low == 1)
397 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
399 axnet_reset_8390(dev);
400 AX88190_init(dev, 1);
401 netif_device_attach(dev);
408 /*======================================================================
410 MII interface support
412 ======================================================================*/
414 #define MDIO_SHIFT_CLK 0x01
415 #define MDIO_DATA_WRITE0 0x00
416 #define MDIO_DATA_WRITE1 0x08
417 #define MDIO_DATA_READ 0x04
418 #define MDIO_MASK 0x0f
419 #define MDIO_ENB_IN 0x02
421 static void mdio_sync(unsigned int addr)
424 for (bits = 0; bits < 32; bits++) {
425 outb_p(MDIO_DATA_WRITE1, addr);
426 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
430 static int mdio_read(unsigned int addr, int phy_id, int loc)
432 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
436 for (i = 14; i >= 0; i--) {
437 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
439 outb_p(dat | MDIO_SHIFT_CLK, addr);
441 for (i = 19; i > 0; i--) {
442 outb_p(MDIO_ENB_IN, addr);
443 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
444 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
446 return (retval>>1) & 0xffff;
449 static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
451 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
455 for (i = 31; i >= 0; i--) {
456 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
458 outb_p(dat | MDIO_SHIFT_CLK, addr);
460 for (i = 1; i >= 0; i--) {
461 outb_p(MDIO_ENB_IN, addr);
462 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
466 /*====================================================================*/
468 static int axnet_open(struct net_device *dev)
471 axnet_dev_t *info = PRIV(dev);
472 struct pcmcia_device *link = info->p_dev;
473 unsigned int nic_base = dev->base_addr;
475 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
477 if (!pcmcia_dev_present(link))
480 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
481 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
487 info->link_status = 0x00;
488 init_timer(&info->watchdog);
489 info->watchdog.function = ei_watchdog;
490 info->watchdog.data = (u_long)dev;
491 info->watchdog.expires = jiffies + HZ;
492 add_timer(&info->watchdog);
497 /*====================================================================*/
499 static int axnet_close(struct net_device *dev)
501 axnet_dev_t *info = PRIV(dev);
502 struct pcmcia_device *link = info->p_dev;
504 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
507 free_irq(dev->irq, dev);
510 netif_stop_queue(dev);
511 del_timer_sync(&info->watchdog);
516 /*======================================================================
518 Hard reset the card. This used to pause for the same period that
519 a 8390 reset command required, but that shouldn't be necessary.
521 ======================================================================*/
523 static void axnet_reset_8390(struct net_device *dev)
525 unsigned int nic_base = dev->base_addr;
528 ei_status.txing = ei_status.dmaing = 0;
530 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
532 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
534 for (i = 0; i < 100; i++) {
535 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
539 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
542 netdev_err(dev, "axnet_reset_8390() did not complete\n");
544 } /* axnet_reset_8390 */
546 /*====================================================================*/
548 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
550 struct net_device *dev = dev_id;
551 PRIV(dev)->stale = 0;
552 return ax_interrupt(irq, dev_id);
555 static void ei_watchdog(u_long arg)
557 struct net_device *dev = (struct net_device *)(arg);
558 axnet_dev_t *info = PRIV(dev);
559 unsigned int nic_base = dev->base_addr;
560 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
563 if (!netif_device_present(dev)) goto reschedule;
565 /* Check for pending interrupt with expired latency timer: with
566 this, we can limp along even if the interrupt is blocked */
567 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
568 if (!info->fast_poll)
569 netdev_info(dev, "interrupt(s) dropped!\n");
570 ei_irq_wrapper(dev->irq, dev);
571 info->fast_poll = HZ;
573 if (info->fast_poll) {
575 info->watchdog.expires = jiffies + 1;
576 add_timer(&info->watchdog);
580 if (info->phy_id < 0)
582 link = mdio_read(mii_addr, info->phy_id, 1);
583 if (!link || (link == 0xffff)) {
584 netdev_info(dev, "MII is missing!\n");
590 if (link != info->link_status) {
591 u_short p = mdio_read(mii_addr, info->phy_id, 5);
592 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
594 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
596 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
597 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
599 netdev_info(dev, "link partner did not autonegotiate\n");
600 AX88190_init(dev, 1);
602 info->link_status = link;
606 info->watchdog.expires = jiffies + HZ;
607 add_timer(&info->watchdog);
610 /*====================================================================*/
612 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
614 axnet_dev_t *info = PRIV(dev);
615 struct mii_ioctl_data *data = if_mii(rq);
616 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
619 data->phy_id = info->phy_id;
620 case SIOCGMIIREG: /* Read MII PHY register. */
621 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
623 case SIOCSMIIREG: /* Write MII PHY register. */
624 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
630 /*====================================================================*/
632 static void get_8390_hdr(struct net_device *dev,
633 struct e8390_pkt_hdr *hdr,
636 unsigned int nic_base = dev->base_addr;
638 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
639 outb_p(ring_page, nic_base + EN0_RSARHI);
640 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
642 insw(nic_base + AXNET_DATAPORT, hdr,
643 sizeof(struct e8390_pkt_hdr)>>1);
644 /* Fix for big endian systems */
645 hdr->count = le16_to_cpu(hdr->count);
649 /*====================================================================*/
651 static void block_input(struct net_device *dev, int count,
652 struct sk_buff *skb, int ring_offset)
654 unsigned int nic_base = dev->base_addr;
655 struct ei_device *ei_local = netdev_priv(dev);
656 int xfer_count = count;
657 char *buf = skb->data;
659 if ((netif_msg_rx_status(ei_local)) && (count != 4))
660 netdev_dbg(dev, "[bi=%d]\n", count+4);
661 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
662 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
663 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
665 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
667 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
671 /*====================================================================*/
673 static void block_output(struct net_device *dev, int count,
674 const u_char *buf, const int start_page)
676 unsigned int nic_base = dev->base_addr;
678 pr_debug("%s: [bo=%d]\n", dev->name, count);
680 /* Round the count up for word writes. Do we need to do this?
681 What effect will an odd byte count have on the 8390?
682 I should check someday. */
686 outb_p(0x00, nic_base + EN0_RSARLO);
687 outb_p(start_page, nic_base + EN0_RSARHI);
688 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
689 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
692 static const struct pcmcia_device_id axnet_ids[] = {
693 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
694 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
695 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
696 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
697 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
698 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
699 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
700 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
701 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
702 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
703 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
704 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
705 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
706 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
707 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
708 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
709 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
710 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
711 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
712 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
713 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
714 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
715 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
716 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
717 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
718 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
719 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
720 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
723 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
725 static struct pcmcia_driver axnet_cs_driver = {
726 .owner = THIS_MODULE,
728 .probe = axnet_probe,
729 .remove = axnet_detach,
730 .id_table = axnet_ids,
731 .suspend = axnet_suspend,
732 .resume = axnet_resume,
734 module_pcmcia_driver(axnet_cs_driver);
736 /*====================================================================*/
738 /* 8390.c: A general NS8390 ethernet driver core for linux. */
740 Written 1992-94 by Donald Becker.
742 Copyright 1993 United States Government as represented by the
743 Director, National Security Agency.
745 This software may be used and distributed according to the terms
746 of the GNU General Public License, incorporated herein by reference.
748 The author may be reached as becker@scyld.com, or C/O
749 Scyld Computing Corporation
750 410 Severn Ave., Suite 210
753 This is the chip-specific code for many 8390-based ethernet adaptors.
754 This is not a complete driver, it must be combined with board-specific
755 code such as ne.c, wd.c, 3c503.c, etc.
757 Seeing how at least eight drivers use this code, (not counting the
758 PCMCIA ones either) it is easy to break some card by what seems like
759 a simple innocent change. Please contact me or Donald if you think
760 you have found something that needs changing. -- PG
764 Paul Gortmaker : remove set_bit lock, other cleanups.
765 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
766 ei_block_input() for eth_io_copy_and_sum().
767 Paul Gortmaker : exchange static int ei_pingpong for a #define,
768 also add better Tx error handling.
769 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
770 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
771 Paul Gortmaker : tweak ANK's above multicast changes a bit.
772 Paul Gortmaker : update packet statistics for v2.1.x
773 Alan Cox : support arbitrary stupid port mappings on the
774 68K Macintosh. Support >16bit I/O spaces
775 Paul Gortmaker : add kmod support for auto-loading of the 8390
776 module by all drivers that require it.
777 Alan Cox : Spinlocking work, added 'BUG_83C690'
778 Paul Gortmaker : Separate out Tx timeout code from Tx path.
781 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
785 #include <linux/bitops.h>
787 #include <linux/fcntl.h>
788 #include <linux/in.h>
789 #include <linux/interrupt.h>
793 /* These are the operational function interfaces to board-specific
795 void reset_8390(struct net_device *dev)
796 Resets the board associated with DEV, including a hardware reset of
797 the 8390. This is only called when there is a transmit timeout, and
798 it is always followed by 8390_init().
799 void block_output(struct net_device *dev, int count, const unsigned char *buf,
801 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
802 "page" value uses the 8390's 256-byte pages.
803 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
804 Read the 4 byte, page aligned 8390 header. *If* there is a
805 subsequent read, it will be of the rest of the packet.
806 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
807 Read COUNT bytes from the packet buffer into the skb data area. Start
808 reading from RING_OFFSET, the address as the 8390 sees it. This will always
809 follow the read of the 8390 header.
811 #define ei_reset_8390 (ei_local->reset_8390)
812 #define ei_block_output (ei_local->block_output)
813 #define ei_block_input (ei_local->block_input)
814 #define ei_get_8390_hdr (ei_local->get_8390_hdr)
816 /* Index to functions. */
817 static void ei_tx_intr(struct net_device *dev);
818 static void ei_tx_err(struct net_device *dev);
819 static void ei_receive(struct net_device *dev);
820 static void ei_rx_overrun(struct net_device *dev);
822 /* Routines generic to NS8390-based boards. */
823 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
825 static void do_set_multicast_list(struct net_device *dev);
828 * SMP and the 8390 setup.
830 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
831 * a page register that controls bank and packet buffer access. We guard
832 * this with ei_local->page_lock. Nobody should assume or set the page other
833 * than zero when the lock is not held. Lock holders must restore page 0
834 * before unlocking. Even pure readers must take the lock to protect in
837 * To make life difficult the chip can also be very slow. We therefore can't
838 * just use spinlocks. For the longer lockups we disable the irq the device
839 * sits on and hold the lock. We must hold the lock because there is a dual
840 * processor case other than interrupts (get stats/set multicast list in
841 * parallel with each other and transmit).
843 * Note: in theory we can just disable the irq on the card _but_ there is
844 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
845 * enter lock, take the queued irq. So we waddle instead of flying.
847 * Finally by special arrangement for the purpose of being generally
848 * annoying the transmit function is called bh atomic. That places
849 * restrictions on the user context callers as disable_irq won't save
854 * ax_open - Open/initialize the board.
855 * @dev: network device to initialize
857 * This routine goes all-out, setting everything
858 * up anew at each open, even though many of these registers should only
859 * need to be set once at boot.
861 static int ax_open(struct net_device *dev)
864 struct ei_device *ei_local = netdev_priv(dev);
867 * Grab the page lock so we own the register set, then call
871 spin_lock_irqsave(&ei_local->page_lock, flags);
872 AX88190_init(dev, 1);
873 /* Set the flag before we drop the lock, That way the IRQ arrives
874 after its set and we get no silly warnings */
875 netif_start_queue(dev);
876 spin_unlock_irqrestore(&ei_local->page_lock, flags);
877 ei_local->irqlock = 0;
881 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
884 * ax_close - shut down network device
885 * @dev: network device to close
887 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
889 static int ax_close(struct net_device *dev)
894 * Hold the page lock during close
897 spin_lock_irqsave(&dev_lock(dev), flags);
898 AX88190_init(dev, 0);
899 spin_unlock_irqrestore(&dev_lock(dev), flags);
900 netif_stop_queue(dev);
905 * axnet_tx_timeout - handle transmit time out condition
906 * @dev: network device which has apparently fallen asleep
908 * Called by kernel when device never acknowledges a transmit has
909 * completed (or failed) - i.e. never posted a Tx related interrupt.
912 static void axnet_tx_timeout(struct net_device *dev)
914 long e8390_base = dev->base_addr;
915 struct ei_device *ei_local = netdev_priv(dev);
916 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
919 dev->stats.tx_errors++;
921 spin_lock_irqsave(&ei_local->page_lock, flags);
922 txsr = inb(e8390_base+EN0_TSR);
923 isr = inb(e8390_base+EN0_ISR);
924 spin_unlock_irqrestore(&ei_local->page_lock, flags);
926 netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
927 (txsr & ENTSR_ABT) ? "excess collisions." :
928 (isr) ? "lost interrupt?" : "cable problem?",
929 txsr, isr, tickssofar);
931 if (!isr && !dev->stats.tx_packets)
933 /* The 8390 probably hasn't gotten on the cable yet. */
934 ei_local->interface_num ^= 1; /* Try a different xcvr. */
937 /* Ugly but a reset can be slow, yet must be protected */
939 spin_lock_irqsave(&ei_local->page_lock, flags);
941 /* Try to restart the card. Perhaps the user has fixed something. */
943 AX88190_init(dev, 1);
945 spin_unlock_irqrestore(&ei_local->page_lock, flags);
946 netif_wake_queue(dev);
950 * axnet_start_xmit - begin packet transmission
951 * @skb: packet to be sent
952 * @dev: network device to which packet is sent
954 * Sends a packet to an 8390 network device.
957 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
958 struct net_device *dev)
960 long e8390_base = dev->base_addr;
961 struct ei_device *ei_local = netdev_priv(dev);
962 int length, send_length, output_page;
966 netif_stop_queue(dev);
970 /* Mask interrupts from the ethercard.
971 SMP: We have to grab the lock here otherwise the IRQ handler
972 on another CPU can flip window and race the IRQ mask set. We end
973 up trashing the mcast filter not disabling irqs if we don't lock */
975 spin_lock_irqsave(&ei_local->page_lock, flags);
976 outb_p(0x00, e8390_base + EN0_IMR);
979 * Slow phase with lock held.
982 ei_local->irqlock = 1;
984 send_length = max(length, ETH_ZLEN);
987 * We have two Tx slots available for use. Find the first free
988 * slot, and then perform some sanity checks. With two Tx bufs,
989 * you get very close to transmitting back-to-back packets. With
990 * only one Tx buf, the transmitter sits idle while you reload the
991 * card, leaving a substantial gap between each transmitted packet.
994 if (ei_local->tx1 == 0)
996 output_page = ei_local->tx_start_page;
997 ei_local->tx1 = send_length;
998 if ((netif_msg_tx_queued(ei_local)) &&
1001 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
1002 ei_local->tx2, ei_local->lasttx,
1005 else if (ei_local->tx2 == 0)
1007 output_page = ei_local->tx_start_page + TX_PAGES/2;
1008 ei_local->tx2 = send_length;
1009 if ((netif_msg_tx_queued(ei_local)) &&
1012 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1013 ei_local->tx1, ei_local->lasttx,
1017 { /* We should never get here. */
1018 netif_dbg(ei_local, tx_err, dev,
1019 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1020 ei_local->tx1, ei_local->tx2,
1022 ei_local->irqlock = 0;
1023 netif_stop_queue(dev);
1024 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1025 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1026 dev->stats.tx_errors++;
1027 return NETDEV_TX_BUSY;
1031 * Okay, now upload the packet and trigger a send if the transmitter
1032 * isn't already sending. If it is busy, the interrupt handler will
1033 * trigger the send later, upon receiving a Tx done interrupt.
1036 if (length == skb->len)
1037 ei_block_output(dev, length, skb->data, output_page);
1039 memset(packet, 0, ETH_ZLEN);
1040 skb_copy_from_linear_data(skb, packet, skb->len);
1041 ei_block_output(dev, length, packet, output_page);
1044 if (! ei_local->txing)
1046 ei_local->txing = 1;
1047 NS8390_trigger_send(dev, send_length, output_page);
1048 dev->trans_start = jiffies;
1049 if (output_page == ei_local->tx_start_page)
1052 ei_local->lasttx = -1;
1057 ei_local->lasttx = -2;
1060 else ei_local->txqueue++;
1062 if (ei_local->tx1 && ei_local->tx2)
1063 netif_stop_queue(dev);
1065 netif_start_queue(dev);
1067 /* Turn 8390 interrupts back on. */
1068 ei_local->irqlock = 0;
1069 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1071 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1073 dev_kfree_skb (skb);
1074 dev->stats.tx_bytes += send_length;
1076 return NETDEV_TX_OK;
1080 * ax_interrupt - handle the interrupts from an 8390
1081 * @irq: interrupt number
1082 * @dev_id: a pointer to the net_device
1084 * Handle the ether interface interrupts. We pull packets from
1085 * the 8390 via the card specific functions and fire them at the networking
1086 * stack. We also handle transmit completions and wake the transmit path if
1087 * necessary. We also update the counters and do other housekeeping as
1091 static irqreturn_t ax_interrupt(int irq, void *dev_id)
1093 struct net_device *dev = dev_id;
1095 int interrupts, nr_serviced = 0, i;
1096 struct ei_device *ei_local;
1098 unsigned long flags;
1100 e8390_base = dev->base_addr;
1101 ei_local = netdev_priv(dev);
1104 * Protect the irq test too.
1107 spin_lock_irqsave(&ei_local->page_lock, flags);
1109 if (ei_local->irqlock) {
1110 #if 1 /* This might just be an interrupt for a PCI device sharing this line */
1112 /* The "irqlock" check is only for testing. */
1113 if (ei_local->irqlock)
1114 msg = "Interrupted while interrupts are masked!";
1116 msg = "Reentering the interrupt handler!";
1117 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1119 inb_p(e8390_base + EN0_ISR),
1120 inb_p(e8390_base + EN0_IMR));
1122 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1126 netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
1127 inb_p(e8390_base + EN0_ISR));
1129 outb_p(0x00, e8390_base + EN0_ISR);
1130 ei_local->irqlock = 1;
1132 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1133 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1134 ++nr_serviced < MAX_SERVICE)
1136 if (!netif_running(dev) || (interrupts == 0xff)) {
1137 netif_warn(ei_local, intr, dev,
1138 "interrupt from stopped card\n");
1139 outb_p(interrupts, e8390_base + EN0_ISR);
1145 /* AX88190 bug fix. */
1146 outb_p(interrupts, e8390_base + EN0_ISR);
1147 for (i = 0; i < 10; i++) {
1148 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1150 outb_p(0, e8390_base + EN0_ISR);
1151 outb_p(interrupts, e8390_base + EN0_ISR);
1153 if (interrupts & ENISR_OVER)
1155 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1157 /* Got a good (?) packet. */
1160 /* Push the next to-transmit packet through. */
1161 if (interrupts & ENISR_TX)
1163 else if (interrupts & ENISR_TX_ERR)
1166 if (interrupts & ENISR_COUNTERS)
1168 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1169 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1170 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1174 if (interrupts && (netif_msg_intr(ei_local)))
1177 if (nr_serviced >= MAX_SERVICE)
1179 /* 0xFF is valid for a card removal */
1180 if (interrupts != 0xFF)
1182 "Too much work at interrupt, status %#2.2x\n",
1184 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1186 netdev_warn(dev, "unknown interrupt %#2x\n",
1188 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1192 /* Turn 8390 interrupts back on. */
1193 ei_local->irqlock = 0;
1194 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1196 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1197 return IRQ_RETVAL(handled);
1201 * ei_tx_err - handle transmitter error
1202 * @dev: network device which threw the exception
1204 * A transmitter error has happened. Most likely excess collisions (which
1205 * is a fairly normal condition). If the error is one where the Tx will
1206 * have been aborted, we try and send another one right away, instead of
1207 * letting the failed packet sit and collect dust in the Tx buffer. This
1208 * is a much better solution as it avoids kernel based Tx timeouts, and
1209 * an unnecessary card reset.
1211 * Called with lock held.
1214 static void ei_tx_err(struct net_device *dev)
1216 long e8390_base = dev->base_addr;
1217 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1218 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1220 #ifdef VERBOSE_ERROR_DUMP
1221 netdev_dbg(dev, "transmitter error (%#2x):", txsr);
1222 if (txsr & ENTSR_ABT)
1223 pr_cont(" excess-collisions");
1224 if (txsr & ENTSR_ND)
1225 pr_cont(" non-deferral");
1226 if (txsr & ENTSR_CRS)
1227 pr_cont(" lost-carrier");
1228 if (txsr & ENTSR_FU)
1229 pr_cont(" FIFO-underrun");
1230 if (txsr & ENTSR_CDH)
1231 pr_cont(" lost-heartbeat");
1239 dev->stats.tx_errors++;
1240 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1241 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1242 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1247 * ei_tx_intr - transmit interrupt handler
1248 * @dev: network device for which tx intr is handled
1250 * We have finished a transmit: check for errors and then trigger the next
1251 * packet to be sent. Called with lock held.
1254 static void ei_tx_intr(struct net_device *dev)
1256 long e8390_base = dev->base_addr;
1257 struct ei_device *ei_local = netdev_priv(dev);
1258 int status = inb(e8390_base + EN0_TSR);
1261 * There are two Tx buffers, see which one finished, and trigger
1262 * the send of another one if it exists.
1264 ei_local->txqueue--;
1266 if (ei_local->tx1 < 0)
1268 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1269 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1270 ei_local->name, ei_local->lasttx,
1273 if (ei_local->tx2 > 0)
1275 ei_local->txing = 1;
1276 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1277 dev->trans_start = jiffies;
1279 ei_local->lasttx = 2;
1281 else ei_local->lasttx = 20, ei_local->txing = 0;
1283 else if (ei_local->tx2 < 0)
1285 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1286 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1287 ei_local->name, ei_local->lasttx,
1290 if (ei_local->tx1 > 0)
1292 ei_local->txing = 1;
1293 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1294 dev->trans_start = jiffies;
1296 ei_local->lasttx = 1;
1299 ei_local->lasttx = 10, ei_local->txing = 0;
1302 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1303 // ei_local->lasttx);
1305 /* Minimize Tx latency: update the statistics after we restart TXing. */
1306 if (status & ENTSR_COL)
1307 dev->stats.collisions++;
1308 if (status & ENTSR_PTX)
1309 dev->stats.tx_packets++;
1312 dev->stats.tx_errors++;
1313 if (status & ENTSR_ABT)
1315 dev->stats.tx_aborted_errors++;
1316 dev->stats.collisions += 16;
1318 if (status & ENTSR_CRS)
1319 dev->stats.tx_carrier_errors++;
1320 if (status & ENTSR_FU)
1321 dev->stats.tx_fifo_errors++;
1322 if (status & ENTSR_CDH)
1323 dev->stats.tx_heartbeat_errors++;
1324 if (status & ENTSR_OWC)
1325 dev->stats.tx_window_errors++;
1327 netif_wake_queue(dev);
1331 * ei_receive - receive some packets
1332 * @dev: network device with which receive will be run
1334 * We have a good packet(s), get it/them out of the buffers.
1335 * Called with lock held.
1338 static void ei_receive(struct net_device *dev)
1340 long e8390_base = dev->base_addr;
1341 struct ei_device *ei_local = netdev_priv(dev);
1342 unsigned char rxing_page, this_frame, next_frame;
1343 unsigned short current_offset;
1344 int rx_pkt_count = 0;
1345 struct e8390_pkt_hdr rx_frame;
1347 while (++rx_pkt_count < 10)
1349 int pkt_len, pkt_stat;
1351 /* Get the rx page (incoming packet pointer). */
1352 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1354 /* Remove one frame from the ring. Boundary is always a page behind. */
1355 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1356 if (this_frame >= ei_local->stop_page)
1357 this_frame = ei_local->rx_start_page;
1359 /* Someday we'll omit the previous, iff we never get this message.
1360 (There is at least one clone claimed to have a problem.)
1362 Keep quiet if it looks like a card removal. One problem here
1363 is that some clones crash in roughly the same way.
1365 if ((netif_msg_rx_err(ei_local)) &&
1366 this_frame != ei_local->current_page &&
1367 (this_frame != 0x0 || rxing_page != 0xFF))
1368 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1369 this_frame, ei_local->current_page);
1371 if (this_frame == rxing_page) /* Read all the frames? */
1372 break; /* Done for now */
1374 current_offset = this_frame << 8;
1375 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1377 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1378 pkt_stat = rx_frame.status;
1380 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1382 if (pkt_len < 60 || pkt_len > 1518)
1384 netif_err(ei_local, rx_err, dev,
1385 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1386 rx_frame.count, rx_frame.status,
1388 dev->stats.rx_errors++;
1389 dev->stats.rx_length_errors++;
1391 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1393 struct sk_buff *skb;
1395 skb = netdev_alloc_skb(dev, pkt_len + 2);
1398 netif_err(ei_local, rx_err, dev,
1399 "Couldn't allocate a sk_buff of size %d\n",
1401 dev->stats.rx_dropped++;
1406 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1407 skb_put(skb, pkt_len); /* Make room */
1408 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1409 skb->protocol=eth_type_trans(skb,dev);
1411 dev->stats.rx_packets++;
1412 dev->stats.rx_bytes += pkt_len;
1413 if (pkt_stat & ENRSR_PHY)
1414 dev->stats.multicast++;
1419 netif_err(ei_local, rx_err, dev,
1420 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1421 rx_frame.status, rx_frame.next,
1423 dev->stats.rx_errors++;
1424 /* NB: The NIC counts CRC, frame and missed errors. */
1425 if (pkt_stat & ENRSR_FO)
1426 dev->stats.rx_fifo_errors++;
1428 next_frame = rx_frame.next;
1430 /* This _should_ never happen: it's here for avoiding bad clones. */
1431 if (next_frame >= ei_local->stop_page) {
1432 netdev_info(dev, "next frame inconsistency, %#2x\n",
1434 next_frame = ei_local->rx_start_page;
1436 ei_local->current_page = next_frame;
1437 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1442 * ei_rx_overrun - handle receiver overrun
1443 * @dev: network device which threw exception
1445 * We have a receiver overrun: we have to kick the 8390 to get it started
1446 * again. Problem is that you have to kick it exactly as NS prescribes in
1447 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1448 * This includes causing "the NIC to defer indefinitely when it is stopped
1449 * on a busy network." Ugh.
1450 * Called with lock held. Don't call this with the interrupts off or your
1451 * computer will hate you - it takes 10ms or so.
1454 static void ei_rx_overrun(struct net_device *dev)
1456 axnet_dev_t *info = PRIV(dev);
1457 long e8390_base = dev->base_addr;
1458 unsigned char was_txing, must_resend = 0;
1459 struct ei_device *ei_local = netdev_priv(dev);
1462 * Record whether a Tx was in progress and then issue the
1465 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1466 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1468 netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
1469 dev->stats.rx_over_errors++;
1472 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1473 * We wait at least 2ms.
1479 * Reset RBCR[01] back to zero as per magic incantation.
1481 outb_p(0x00, e8390_base+EN0_RCNTLO);
1482 outb_p(0x00, e8390_base+EN0_RCNTHI);
1485 * See if any Tx was interrupted or not. According to NS, this
1486 * step is vital, and skipping it will cause no end of havoc.
1491 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1497 * Have to enter loopback mode and then restart the NIC before
1498 * you are allowed to slurp packets up off the ring.
1500 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1501 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1504 * Clear the Rx ring of all the debris, and ack the interrupt.
1509 * Leave loopback mode, and resend any packet that got stopped.
1511 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1513 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1517 * Collect the stats. This is called unlocked and from several contexts.
1520 static struct net_device_stats *get_stats(struct net_device *dev)
1522 long ioaddr = dev->base_addr;
1523 struct ei_device *ei_local = netdev_priv(dev);
1524 unsigned long flags;
1526 /* If the card is stopped, just return the present stats. */
1527 if (!netif_running(dev))
1530 spin_lock_irqsave(&ei_local->page_lock,flags);
1531 /* Read the counter registers, assuming we are in page 0. */
1532 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1533 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1534 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1535 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1541 * Form the 64 bit 8390 multicast table from the linked list of addresses
1542 * associated with this dev structure.
1545 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1547 struct netdev_hw_addr *ha;
1550 netdev_for_each_mc_addr(ha, dev) {
1551 crc = ether_crc(ETH_ALEN, ha->addr);
1553 * The 8390 uses the 6 most significant bits of the
1554 * CRC to index the multicast table.
1556 bits[crc>>29] |= (1<<((crc>>26)&7));
1561 * do_set_multicast_list - set/clear multicast filter
1562 * @dev: net device for which multicast filter is adjusted
1564 * Set or clear the multicast filter for this adaptor.
1565 * Must be called with lock held.
1568 static void do_set_multicast_list(struct net_device *dev)
1570 long e8390_base = dev->base_addr;
1572 struct ei_device *ei_local = netdev_priv(dev);
1574 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1575 memset(ei_local->mcfilter, 0, 8);
1576 if (!netdev_mc_empty(dev))
1577 make_mc_bits(ei_local->mcfilter, dev);
1579 /* set to accept-all */
1580 memset(ei_local->mcfilter, 0xFF, 8);
1583 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1584 for(i = 0; i < 8; i++)
1586 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1588 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1590 if(dev->flags&IFF_PROMISC)
1591 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1592 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1593 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1595 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1597 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1601 * Called without lock held. This is invoked from user context and may
1602 * be parallel to just about everything else. Its also fairly quick and
1603 * not called too often. Must protect against both bh and irq users
1606 static void set_multicast_list(struct net_device *dev)
1608 unsigned long flags;
1610 spin_lock_irqsave(&dev_lock(dev), flags);
1611 do_set_multicast_list(dev);
1612 spin_unlock_irqrestore(&dev_lock(dev), flags);
1615 /* This page of functions should be 8390 generic */
1616 /* Follow National Semi's recommendations for initializing the "NIC". */
1619 * AX88190_init - initialize 8390 hardware
1620 * @dev: network device to initialize
1621 * @startp: boolean. non-zero value to initiate chip processing
1623 * Must be called with lock held.
1626 static void AX88190_init(struct net_device *dev, int startp)
1628 axnet_dev_t *info = PRIV(dev);
1629 long e8390_base = dev->base_addr;
1630 struct ei_device *ei_local = netdev_priv(dev);
1632 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1634 if(sizeof(struct e8390_pkt_hdr)!=4)
1635 panic("8390.c: header struct mispacked\n");
1636 /* Follow National Semi's recommendations for initing the DP83902. */
1637 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1638 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1639 /* Clear the remote byte count registers. */
1640 outb_p(0x00, e8390_base + EN0_RCNTLO);
1641 outb_p(0x00, e8390_base + EN0_RCNTHI);
1642 /* Set to monitor and loopback mode -- this is vital!. */
1643 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1644 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1645 /* Set the transmit page and receive ring. */
1646 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1647 ei_local->tx1 = ei_local->tx2 = 0;
1648 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1649 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1650 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1651 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1652 /* Clear the pending interrupts and mask. */
1653 outb_p(0xFF, e8390_base + EN0_ISR);
1654 outb_p(0x00, e8390_base + EN0_IMR);
1656 /* Copy the station address into the DS8390 registers. */
1658 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1659 for(i = 0; i < 6; i++)
1661 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1662 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1663 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1666 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1667 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1669 netif_start_queue(dev);
1670 ei_local->tx1 = ei_local->tx2 = 0;
1671 ei_local->txing = 0;
1673 if (info->flags & IS_AX88790) /* select Internal PHY */
1674 outb(0x10, e8390_base + AXNET_GPIO);
1678 outb_p(0xff, e8390_base + EN0_ISR);
1679 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1680 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1681 outb_p(E8390_TXCONFIG | info->duplex_flag,
1682 e8390_base + EN0_TXCR); /* xmit on. */
1683 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1684 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1685 do_set_multicast_list(dev); /* (re)load the mcast table */
1689 /* Trigger a transmit start, assuming the length is valid.
1690 Always called with the page lock held */
1692 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1695 long e8390_base = dev->base_addr;
1696 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1698 if (inb_p(e8390_base) & E8390_TRANS)
1700 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1703 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1704 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1705 outb_p(start_page, e8390_base + EN0_TPSR);
1706 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);