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/ptrace.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/delay.h>
35 #include <linux/spinlock.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/crc32.h>
39 #include <linux/mii.h>
42 #include <pcmcia/cistpl.h>
43 #include <pcmcia/ciscode.h>
44 #include <pcmcia/ds.h>
45 #include <pcmcia/cisreg.h>
48 #include <asm/byteorder.h>
49 #include <linux/uaccess.h>
51 #define AXNET_CMD 0x00
52 #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
53 #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
54 #define AXNET_MII_EEP 0x14 /* Offset of MII access port */
55 #define AXNET_TEST 0x15 /* Offset of TEST Register port */
56 #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
58 #define AXNET_START_PG 0x40 /* First page of TX buffer */
59 #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
61 #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
63 #define IS_AX88190 0x0001
64 #define IS_AX88790 0x0002
66 /*====================================================================*/
68 /* Module parameters */
70 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
71 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
72 MODULE_LICENSE("GPL");
75 /*====================================================================*/
77 static int axnet_config(struct pcmcia_device *link);
78 static void axnet_release(struct pcmcia_device *link);
79 static int axnet_open(struct net_device *dev);
80 static int axnet_close(struct net_device *dev);
81 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
82 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
83 struct net_device *dev);
84 static struct net_device_stats *get_stats(struct net_device *dev);
85 static void set_multicast_list(struct net_device *dev);
86 static void axnet_tx_timeout(struct net_device *dev, unsigned int txqueue);
87 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
88 static void ei_watchdog(struct timer_list *t);
89 static void axnet_reset_8390(struct net_device *dev);
91 static int mdio_read(unsigned int addr, int phy_id, int loc);
92 static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
94 static void get_8390_hdr(struct net_device *,
95 struct e8390_pkt_hdr *, int);
96 static void block_input(struct net_device *dev, int count,
97 struct sk_buff *skb, int ring_offset);
98 static void block_output(struct net_device *dev, int count,
99 const u_char *buf, const int start_page);
101 static void axnet_detach(struct pcmcia_device *p_dev);
103 static void AX88190_init(struct net_device *dev, int startp);
104 static int ax_open(struct net_device *dev);
105 static int ax_close(struct net_device *dev);
106 static irqreturn_t ax_interrupt(int irq, void *dev_id);
108 /*====================================================================*/
111 struct pcmcia_device *p_dev;
113 struct timer_list watchdog;
114 int stale, fast_poll;
122 static inline struct axnet_dev *PRIV(struct net_device *dev)
124 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
128 static const struct net_device_ops axnet_netdev_ops = {
129 .ndo_open = axnet_open,
130 .ndo_stop = axnet_close,
131 .ndo_eth_ioctl = axnet_ioctl,
132 .ndo_start_xmit = axnet_start_xmit,
133 .ndo_tx_timeout = axnet_tx_timeout,
134 .ndo_get_stats = get_stats,
135 .ndo_set_rx_mode = set_multicast_list,
136 .ndo_set_mac_address = eth_mac_addr,
137 .ndo_validate_addr = eth_validate_addr,
140 static int axnet_probe(struct pcmcia_device *link)
142 struct axnet_dev *info;
143 struct net_device *dev;
144 struct ei_device *ei_local;
146 dev_dbg(&link->dev, "axnet_attach()\n");
148 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev));
152 ei_local = netdev_priv(dev);
153 spin_lock_init(&ei_local->page_lock);
158 link->config_flags |= CONF_ENABLE_IRQ;
160 dev->netdev_ops = &axnet_netdev_ops;
162 dev->watchdog_timeo = TX_TIMEOUT;
164 return axnet_config(link);
167 static void axnet_detach(struct pcmcia_device *link)
169 struct net_device *dev = link->priv;
171 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
173 unregister_netdev(dev);
180 /*======================================================================
182 This probes for a card's hardware address by reading the PROM.
184 ======================================================================*/
186 static int get_prom(struct pcmcia_device *link)
188 struct net_device *dev = link->priv;
189 unsigned int ioaddr = dev->base_addr;
193 /* This is based on drivers/net/ethernet/8390/ne.c */
195 u_char value, offset;
197 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
198 {0x01, EN0_DCFG}, /* Set word-wide access. */
199 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
201 {0x00, EN0_IMR}, /* Mask completion irq. */
203 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
204 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
207 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
209 {E8390_RREAD+E8390_START, E8390_CMD},
212 /* Not much of a test, but the alternatives are messy */
213 if (link->config_base != 0x03c0)
216 axnet_reset_8390(dev);
219 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
220 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
222 for (i = 0; i < 6; i += 2) {
223 j = inw(ioaddr + AXNET_DATAPORT);
227 eth_hw_addr_set(dev, addr);
232 static int try_io_port(struct pcmcia_device *link)
235 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
236 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
237 if (link->resource[0]->end == 32) {
238 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
239 /* for master/slave multifunction cards */
240 if (link->resource[1]->end > 0)
241 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
243 /* This should be two 16-port windows */
244 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
245 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
247 if (link->resource[0]->start == 0) {
248 for (j = 0; j < 0x400; j += 0x20) {
249 link->resource[0]->start = j ^ 0x300;
250 link->resource[1]->start = (j ^ 0x300) + 0x10;
252 ret = pcmcia_request_io(link);
258 return pcmcia_request_io(link);
262 static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
264 if (p_dev->config_index == 0)
267 p_dev->config_index = 0x05;
268 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
271 return try_io_port(p_dev);
274 static int axnet_config(struct pcmcia_device *link)
276 struct net_device *dev = link->priv;
277 struct axnet_dev *info = PRIV(dev);
280 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
282 /* don't trust the CIS on this; Linksys got it wrong */
283 link->config_regs = 0x63;
284 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
285 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
292 if (resource_size(link->resource[1]) == 8)
293 link->config_flags |= CONF_ENABLE_SPKR;
295 ret = pcmcia_enable_device(link);
299 dev->irq = link->irq;
300 dev->base_addr = link->resource[0]->start;
302 if (!get_prom(link)) {
303 pr_notice("this is not an AX88190 card!\n");
304 pr_notice("use pcnet_cs instead.\n");
308 ei_status.name = "AX88190";
309 ei_status.word16 = 1;
310 ei_status.tx_start_page = AXNET_START_PG;
311 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
312 ei_status.stop_page = AXNET_STOP_PG;
313 ei_status.reset_8390 = axnet_reset_8390;
314 ei_status.get_8390_hdr = get_8390_hdr;
315 ei_status.block_input = block_input;
316 ei_status.block_output = block_output;
318 if (inb(dev->base_addr + AXNET_TEST) != 0)
319 info->flags |= IS_AX88790;
321 info->flags |= IS_AX88190;
323 if (info->flags & IS_AX88790)
324 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
326 info->active_low = 0;
328 for (i = 0; i < 32; i++) {
329 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
330 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
331 if (j == j2) continue;
332 if ((j != 0) && (j != 0xffff)) break;
336 /* Maybe PHY is in power down mode. (PPD_SET = 1)
337 Bit 2 of CCSR is active low. */
338 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
339 for (i = 0; i < 32; i++) {
340 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
341 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
342 if (j == j2) continue;
343 if ((j != 0) && (j != 0xffff)) {
344 info->active_low = 1;
350 info->phy_id = (i < 32) ? i : -1;
351 SET_NETDEV_DEV(dev, &link->dev);
353 if (register_netdev(dev) != 0) {
354 pr_notice("register_netdev() failed\n");
358 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
359 ((info->flags & IS_AX88790) ? 7 : 1),
360 dev->base_addr, dev->irq, dev->dev_addr);
361 if (info->phy_id != -1) {
362 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
365 netdev_notice(dev, " No MII transceivers found!\n");
374 static void axnet_release(struct pcmcia_device *link)
376 pcmcia_disable_device(link);
379 static int axnet_suspend(struct pcmcia_device *link)
381 struct net_device *dev = link->priv;
384 netif_device_detach(dev);
389 static int axnet_resume(struct pcmcia_device *link)
391 struct net_device *dev = link->priv;
392 struct axnet_dev *info = PRIV(dev);
395 if (info->active_low == 1)
396 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
398 axnet_reset_8390(dev);
399 AX88190_init(dev, 1);
400 netif_device_attach(dev);
407 /*======================================================================
409 MII interface support
411 ======================================================================*/
413 #define MDIO_SHIFT_CLK 0x01
414 #define MDIO_DATA_WRITE0 0x00
415 #define MDIO_DATA_WRITE1 0x08
416 #define MDIO_DATA_READ 0x04
417 #define MDIO_MASK 0x0f
418 #define MDIO_ENB_IN 0x02
420 static void mdio_sync(unsigned int addr)
423 for (bits = 0; bits < 32; bits++) {
424 outb_p(MDIO_DATA_WRITE1, addr);
425 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
429 static int mdio_read(unsigned int addr, int phy_id, int loc)
431 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
435 for (i = 14; i >= 0; i--) {
436 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
438 outb_p(dat | MDIO_SHIFT_CLK, addr);
440 for (i = 19; i > 0; i--) {
441 outb_p(MDIO_ENB_IN, addr);
442 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
443 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
445 return (retval>>1) & 0xffff;
448 static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
450 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
454 for (i = 31; i >= 0; i--) {
455 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
457 outb_p(dat | MDIO_SHIFT_CLK, addr);
459 for (i = 1; i >= 0; i--) {
460 outb_p(MDIO_ENB_IN, addr);
461 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
465 /*====================================================================*/
467 static int axnet_open(struct net_device *dev)
470 struct axnet_dev *info = PRIV(dev);
471 struct pcmcia_device *link = info->p_dev;
472 unsigned int nic_base = dev->base_addr;
474 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
476 if (!pcmcia_dev_present(link))
479 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
480 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
486 info->link_status = 0x00;
487 timer_setup(&info->watchdog, ei_watchdog, 0);
488 mod_timer(&info->watchdog, jiffies + HZ);
493 /*====================================================================*/
495 static int axnet_close(struct net_device *dev)
497 struct axnet_dev *info = PRIV(dev);
498 struct pcmcia_device *link = info->p_dev;
500 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
503 free_irq(dev->irq, dev);
506 netif_stop_queue(dev);
507 del_timer_sync(&info->watchdog);
512 /*======================================================================
514 Hard reset the card. This used to pause for the same period that
515 a 8390 reset command required, but that shouldn't be necessary.
517 ======================================================================*/
519 static void axnet_reset_8390(struct net_device *dev)
521 unsigned int nic_base = dev->base_addr;
524 ei_status.txing = ei_status.dmaing = 0;
526 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
528 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
530 for (i = 0; i < 100; i++) {
531 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
535 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
538 netdev_err(dev, "axnet_reset_8390() did not complete\n");
540 } /* axnet_reset_8390 */
542 /*====================================================================*/
544 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
546 struct net_device *dev = dev_id;
547 PRIV(dev)->stale = 0;
548 return ax_interrupt(irq, dev_id);
551 static void ei_watchdog(struct timer_list *t)
553 struct axnet_dev *info = from_timer(info, t, watchdog);
554 struct net_device *dev = info->p_dev->priv;
555 unsigned int nic_base = dev->base_addr;
556 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
559 if (!netif_device_present(dev)) goto reschedule;
561 /* Check for pending interrupt with expired latency timer: with
562 this, we can limp along even if the interrupt is blocked */
563 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
564 if (!info->fast_poll)
565 netdev_info(dev, "interrupt(s) dropped!\n");
566 ei_irq_wrapper(dev->irq, dev);
567 info->fast_poll = HZ;
569 if (info->fast_poll) {
571 info->watchdog.expires = jiffies + 1;
572 add_timer(&info->watchdog);
576 if (info->phy_id < 0)
578 link = mdio_read(mii_addr, info->phy_id, 1);
579 if (!link || (link == 0xffff)) {
580 netdev_info(dev, "MII is missing!\n");
586 if (link != info->link_status) {
587 u_short p = mdio_read(mii_addr, info->phy_id, 5);
588 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
590 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
592 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
593 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
595 netdev_info(dev, "link partner did not autonegotiate\n");
596 AX88190_init(dev, 1);
598 info->link_status = link;
602 info->watchdog.expires = jiffies + HZ;
603 add_timer(&info->watchdog);
606 /*====================================================================*/
608 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
610 struct axnet_dev *info = PRIV(dev);
611 struct mii_ioctl_data *data = if_mii(rq);
612 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
615 data->phy_id = info->phy_id;
617 case SIOCGMIIREG: /* Read MII PHY register. */
618 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
620 case SIOCSMIIREG: /* Write MII PHY register. */
621 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
627 /*====================================================================*/
629 static void get_8390_hdr(struct net_device *dev,
630 struct e8390_pkt_hdr *hdr,
633 unsigned int nic_base = dev->base_addr;
635 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
636 outb_p(ring_page, nic_base + EN0_RSARHI);
637 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
639 insw(nic_base + AXNET_DATAPORT, hdr,
640 sizeof(struct e8390_pkt_hdr)>>1);
641 /* Fix for big endian systems */
642 hdr->count = le16_to_cpu(hdr->count);
646 /*====================================================================*/
648 static void block_input(struct net_device *dev, int count,
649 struct sk_buff *skb, int ring_offset)
651 unsigned int nic_base = dev->base_addr;
652 struct ei_device *ei_local = netdev_priv(dev);
653 int xfer_count = count;
654 char *buf = skb->data;
656 if ((netif_msg_rx_status(ei_local)) && (count != 4))
657 netdev_dbg(dev, "[bi=%d]\n", count+4);
658 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
659 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
660 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
662 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
664 buf[count-1] = inb(nic_base + AXNET_DATAPORT);
670 /*====================================================================*/
672 static void block_output(struct net_device *dev, int count,
673 const u_char *buf, const int start_page)
675 unsigned int nic_base = dev->base_addr;
677 pr_debug("%s: [bo=%d]\n", dev->name, count);
679 /* Round the count up for word writes. Do we need to do this?
680 What effect will an odd byte count have on the 8390?
681 I should check someday. */
685 outb_p(0x00, nic_base + EN0_RSARLO);
686 outb_p(start_page, nic_base + EN0_RSARHI);
687 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
688 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
691 static const struct pcmcia_device_id axnet_ids[] = {
692 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
693 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
694 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
695 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
696 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
697 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
698 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
699 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
700 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
701 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
702 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
703 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
704 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
705 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
706 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
707 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
708 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
709 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
710 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
711 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
712 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
713 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
714 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
715 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
716 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
717 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
718 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
719 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
722 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
724 static struct pcmcia_driver axnet_cs_driver = {
725 .owner = THIS_MODULE,
727 .probe = axnet_probe,
728 .remove = axnet_detach,
729 .id_table = axnet_ids,
730 .suspend = axnet_suspend,
731 .resume = axnet_resume,
733 module_pcmcia_driver(axnet_cs_driver);
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 arbitrary stupid port mappings on the
773 68K Macintosh. Support >16bit I/O spaces
774 Paul Gortmaker : add kmod support for auto-loading of the 8390
775 module by all drivers that require it.
776 Alan Cox : Spinlocking work, added 'BUG_83C690'
777 Paul Gortmaker : Separate out Tx timeout code from Tx path.
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 /* Index to functions. */
816 static void ei_tx_intr(struct net_device *dev);
817 static void ei_tx_err(struct net_device *dev);
818 static void ei_receive(struct net_device *dev);
819 static void ei_rx_overrun(struct net_device *dev);
821 /* Routines generic to NS8390-based boards. */
822 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
824 static void do_set_multicast_list(struct net_device *dev);
827 * SMP and the 8390 setup.
829 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
830 * a page register that controls bank and packet buffer access. We guard
831 * this with ei_local->page_lock. Nobody should assume or set the page other
832 * than zero when the lock is not held. Lock holders must restore page 0
833 * before unlocking. Even pure readers must take the lock to protect in
836 * To make life difficult the chip can also be very slow. We therefore can't
837 * just use spinlocks. For the longer lockups we disable the irq the device
838 * sits on and hold the lock. We must hold the lock because there is a dual
839 * processor case other than interrupts (get stats/set multicast list in
840 * parallel with each other and transmit).
842 * Note: in theory we can just disable the irq on the card _but_ there is
843 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
844 * enter lock, take the queued irq. So we waddle instead of flying.
846 * Finally by special arrangement for the purpose of being generally
847 * annoying the transmit function is called bh atomic. That places
848 * restrictions on the user context callers as disable_irq won't save
853 * ax_open - Open/initialize the board.
854 * @dev: network device to initialize
856 * This routine goes all-out, setting everything
857 * up anew at each open, even though many of these registers should only
858 * need to be set once at boot.
860 static int ax_open(struct net_device *dev)
863 struct ei_device *ei_local = netdev_priv(dev);
866 * Grab the page lock so we own the register set, then call
870 spin_lock_irqsave(&ei_local->page_lock, flags);
871 AX88190_init(dev, 1);
872 /* Set the flag before we drop the lock, That way the IRQ arrives
873 after its set and we get no silly warnings */
874 netif_start_queue(dev);
875 spin_unlock_irqrestore(&ei_local->page_lock, flags);
876 ei_local->irqlock = 0;
880 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
883 * ax_close - shut down network device
884 * @dev: network device to close
886 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
888 static int ax_close(struct net_device *dev)
893 * Hold the page lock during close
896 spin_lock_irqsave(&dev_lock(dev), flags);
897 AX88190_init(dev, 0);
898 spin_unlock_irqrestore(&dev_lock(dev), flags);
899 netif_stop_queue(dev);
904 * axnet_tx_timeout - handle transmit time out condition
905 * @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, unsigned int txqueue)
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 netif_trans_update(dev);
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 netif_trans_update(dev);
1279 ei_local->lasttx = 2;
1281 ei_local->lasttx = 20;
1282 ei_local->txing = 0;
1285 else if (ei_local->tx2 < 0)
1287 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1288 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1289 ei_local->name, ei_local->lasttx,
1292 if (ei_local->tx1 > 0)
1294 ei_local->txing = 1;
1295 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1296 netif_trans_update(dev);
1298 ei_local->lasttx = 1;
1300 ei_local->lasttx = 10;
1301 ei_local->txing = 0;
1305 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1306 // ei_local->lasttx);
1308 /* Minimize Tx latency: update the statistics after we restart TXing. */
1309 if (status & ENTSR_COL)
1310 dev->stats.collisions++;
1311 if (status & ENTSR_PTX)
1312 dev->stats.tx_packets++;
1315 dev->stats.tx_errors++;
1316 if (status & ENTSR_ABT)
1318 dev->stats.tx_aborted_errors++;
1319 dev->stats.collisions += 16;
1321 if (status & ENTSR_CRS)
1322 dev->stats.tx_carrier_errors++;
1323 if (status & ENTSR_FU)
1324 dev->stats.tx_fifo_errors++;
1325 if (status & ENTSR_CDH)
1326 dev->stats.tx_heartbeat_errors++;
1327 if (status & ENTSR_OWC)
1328 dev->stats.tx_window_errors++;
1330 netif_wake_queue(dev);
1334 * ei_receive - receive some packets
1335 * @dev: network device with which receive will be run
1337 * We have a good packet(s), get it/them out of the buffers.
1338 * Called with lock held.
1341 static void ei_receive(struct net_device *dev)
1343 long e8390_base = dev->base_addr;
1344 struct ei_device *ei_local = netdev_priv(dev);
1345 unsigned char rxing_page, this_frame, next_frame;
1346 unsigned short current_offset;
1347 int rx_pkt_count = 0;
1348 struct e8390_pkt_hdr rx_frame;
1350 while (++rx_pkt_count < 10)
1352 int pkt_len, pkt_stat;
1354 /* Get the rx page (incoming packet pointer). */
1355 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1357 /* Remove one frame from the ring. Boundary is always a page behind. */
1358 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1359 if (this_frame >= ei_local->stop_page)
1360 this_frame = ei_local->rx_start_page;
1362 /* Someday we'll omit the previous, iff we never get this message.
1363 (There is at least one clone claimed to have a problem.)
1365 Keep quiet if it looks like a card removal. One problem here
1366 is that some clones crash in roughly the same way.
1368 if ((netif_msg_rx_err(ei_local)) &&
1369 this_frame != ei_local->current_page &&
1370 (this_frame != 0x0 || rxing_page != 0xFF))
1371 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1372 this_frame, ei_local->current_page);
1374 if (this_frame == rxing_page) /* Read all the frames? */
1375 break; /* Done for now */
1377 current_offset = this_frame << 8;
1378 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1380 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1381 pkt_stat = rx_frame.status;
1383 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1385 if (pkt_len < 60 || pkt_len > 1518)
1387 netif_err(ei_local, rx_err, dev,
1388 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1389 rx_frame.count, rx_frame.status,
1391 dev->stats.rx_errors++;
1392 dev->stats.rx_length_errors++;
1394 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1396 struct sk_buff *skb;
1398 skb = netdev_alloc_skb(dev, pkt_len + 2);
1401 netif_err(ei_local, rx_err, dev,
1402 "Couldn't allocate a sk_buff of size %d\n",
1404 dev->stats.rx_dropped++;
1409 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1410 skb_put(skb, pkt_len); /* Make room */
1411 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1412 skb->protocol=eth_type_trans(skb,dev);
1414 dev->stats.rx_packets++;
1415 dev->stats.rx_bytes += pkt_len;
1416 if (pkt_stat & ENRSR_PHY)
1417 dev->stats.multicast++;
1422 netif_err(ei_local, rx_err, dev,
1423 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1424 rx_frame.status, rx_frame.next,
1426 dev->stats.rx_errors++;
1427 /* NB: The NIC counts CRC, frame and missed errors. */
1428 if (pkt_stat & ENRSR_FO)
1429 dev->stats.rx_fifo_errors++;
1431 next_frame = rx_frame.next;
1433 /* This _should_ never happen: it's here for avoiding bad clones. */
1434 if (next_frame >= ei_local->stop_page) {
1435 netdev_info(dev, "next frame inconsistency, %#2x\n",
1437 next_frame = ei_local->rx_start_page;
1439 ei_local->current_page = next_frame;
1440 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1445 * ei_rx_overrun - handle receiver overrun
1446 * @dev: network device which threw exception
1448 * We have a receiver overrun: we have to kick the 8390 to get it started
1449 * again. Problem is that you have to kick it exactly as NS prescribes in
1450 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1451 * This includes causing "the NIC to defer indefinitely when it is stopped
1452 * on a busy network." Ugh.
1453 * Called with lock held. Don't call this with the interrupts off or your
1454 * computer will hate you - it takes 10ms or so.
1457 static void ei_rx_overrun(struct net_device *dev)
1459 struct axnet_dev *info = PRIV(dev);
1460 long e8390_base = dev->base_addr;
1461 unsigned char was_txing, must_resend = 0;
1462 struct ei_device *ei_local = netdev_priv(dev);
1465 * Record whether a Tx was in progress and then issue the
1468 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1469 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1471 netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
1472 dev->stats.rx_over_errors++;
1475 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1476 * We wait at least 2ms.
1482 * Reset RBCR[01] back to zero as per magic incantation.
1484 outb_p(0x00, e8390_base+EN0_RCNTLO);
1485 outb_p(0x00, e8390_base+EN0_RCNTHI);
1488 * See if any Tx was interrupted or not. According to NS, this
1489 * step is vital, and skipping it will cause no end of havoc.
1494 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1500 * Have to enter loopback mode and then restart the NIC before
1501 * you are allowed to slurp packets up off the ring.
1503 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1504 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1507 * Clear the Rx ring of all the debris, and ack the interrupt.
1512 * Leave loopback mode, and resend any packet that got stopped.
1514 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1516 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1520 * Collect the stats. This is called unlocked and from several contexts.
1523 static struct net_device_stats *get_stats(struct net_device *dev)
1525 long ioaddr = dev->base_addr;
1526 struct ei_device *ei_local = netdev_priv(dev);
1527 unsigned long flags;
1529 /* If the card is stopped, just return the present stats. */
1530 if (!netif_running(dev))
1533 spin_lock_irqsave(&ei_local->page_lock,flags);
1534 /* Read the counter registers, assuming we are in page 0. */
1535 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1536 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1537 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1538 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1544 * Form the 64 bit 8390 multicast table from the linked list of addresses
1545 * associated with this dev structure.
1548 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1550 struct netdev_hw_addr *ha;
1553 netdev_for_each_mc_addr(ha, dev) {
1554 crc = ether_crc(ETH_ALEN, ha->addr);
1556 * The 8390 uses the 6 most significant bits of the
1557 * CRC to index the multicast table.
1559 bits[crc>>29] |= (1<<((crc>>26)&7));
1564 * do_set_multicast_list - set/clear multicast filter
1565 * @dev: net device for which multicast filter is adjusted
1567 * Set or clear the multicast filter for this adaptor.
1568 * Must be called with lock held.
1571 static void do_set_multicast_list(struct net_device *dev)
1573 long e8390_base = dev->base_addr;
1575 struct ei_device *ei_local = netdev_priv(dev);
1577 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1578 memset(ei_local->mcfilter, 0, 8);
1579 if (!netdev_mc_empty(dev))
1580 make_mc_bits(ei_local->mcfilter, dev);
1582 /* set to accept-all */
1583 memset(ei_local->mcfilter, 0xFF, 8);
1586 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1587 for(i = 0; i < 8; i++)
1589 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1591 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1593 if(dev->flags&IFF_PROMISC)
1594 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1595 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1596 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1598 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1600 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1604 * Called without lock held. This is invoked from user context and may
1605 * be parallel to just about everything else. Its also fairly quick and
1606 * not called too often. Must protect against both bh and irq users
1609 static void set_multicast_list(struct net_device *dev)
1611 unsigned long flags;
1613 spin_lock_irqsave(&dev_lock(dev), flags);
1614 do_set_multicast_list(dev);
1615 spin_unlock_irqrestore(&dev_lock(dev), flags);
1618 /* This page of functions should be 8390 generic */
1619 /* Follow National Semi's recommendations for initializing the "NIC". */
1622 * AX88190_init - initialize 8390 hardware
1623 * @dev: network device to initialize
1624 * @startp: boolean. non-zero value to initiate chip processing
1626 * Must be called with lock held.
1629 static void AX88190_init(struct net_device *dev, int startp)
1631 struct axnet_dev *info = PRIV(dev);
1632 long e8390_base = dev->base_addr;
1633 struct ei_device *ei_local = netdev_priv(dev);
1635 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1637 if(sizeof(struct e8390_pkt_hdr)!=4)
1638 panic("8390.c: header struct mispacked\n");
1639 /* Follow National Semi's recommendations for initing the DP83902. */
1640 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1641 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1642 /* Clear the remote byte count registers. */
1643 outb_p(0x00, e8390_base + EN0_RCNTLO);
1644 outb_p(0x00, e8390_base + EN0_RCNTHI);
1645 /* Set to monitor and loopback mode -- this is vital!. */
1646 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1647 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1648 /* Set the transmit page and receive ring. */
1649 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1650 ei_local->tx1 = ei_local->tx2 = 0;
1651 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1652 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1653 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1654 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1655 /* Clear the pending interrupts and mask. */
1656 outb_p(0xFF, e8390_base + EN0_ISR);
1657 outb_p(0x00, e8390_base + EN0_IMR);
1659 /* Copy the station address into the DS8390 registers. */
1661 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1662 for(i = 0; i < 6; i++)
1664 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1665 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1666 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1669 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1670 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1672 netif_start_queue(dev);
1673 ei_local->tx1 = ei_local->tx2 = 0;
1674 ei_local->txing = 0;
1676 if (info->flags & IS_AX88790) /* select Internal PHY */
1677 outb(0x10, e8390_base + AXNET_GPIO);
1681 outb_p(0xff, e8390_base + EN0_ISR);
1682 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1683 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1684 outb_p(E8390_TXCONFIG | info->duplex_flag,
1685 e8390_base + EN0_TXCR); /* xmit on. */
1686 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1687 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1688 do_set_multicast_list(dev); /* (re)load the mcast table */
1692 /* Trigger a transmit start, assuming the length is valid.
1693 Always called with the page lock held */
1695 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1698 long e8390_base = dev->base_addr;
1699 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1701 if (inb_p(e8390_base) & E8390_TRANS)
1703 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1706 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1707 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1708 outb_p(start_page, e8390_base + EN0_TPSR);
1709 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);