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);
87 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
88 static void ei_watchdog(u_long arg);
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);
107 static u32 axnet_msg_enable;
109 /*====================================================================*/
112 struct pcmcia_device *p_dev;
114 struct timer_list watchdog;
115 int stale, fast_poll;
123 static inline struct axnet_dev *PRIV(struct net_device *dev)
125 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
129 static const struct net_device_ops axnet_netdev_ops = {
130 .ndo_open = axnet_open,
131 .ndo_stop = axnet_close,
132 .ndo_do_ioctl = axnet_ioctl,
133 .ndo_start_xmit = axnet_start_xmit,
134 .ndo_tx_timeout = axnet_tx_timeout,
135 .ndo_get_stats = get_stats,
136 .ndo_set_rx_mode = set_multicast_list,
137 .ndo_set_mac_address = eth_mac_addr,
138 .ndo_validate_addr = eth_validate_addr,
141 static int axnet_probe(struct pcmcia_device *link)
143 struct axnet_dev *info;
144 struct net_device *dev;
145 struct ei_device *ei_local;
147 dev_dbg(&link->dev, "axnet_attach()\n");
149 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(struct axnet_dev));
153 ei_local = netdev_priv(dev);
154 ei_local->msg_enable = axnet_msg_enable;
155 spin_lock_init(&ei_local->page_lock);
160 link->config_flags |= CONF_ENABLE_IRQ;
162 dev->netdev_ops = &axnet_netdev_ops;
164 dev->watchdog_timeo = TX_TIMEOUT;
166 return axnet_config(link);
169 static void axnet_detach(struct pcmcia_device *link)
171 struct net_device *dev = link->priv;
173 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
175 unregister_netdev(dev);
182 /*======================================================================
184 This probes for a card's hardware address by reading the PROM.
186 ======================================================================*/
188 static int get_prom(struct pcmcia_device *link)
190 struct net_device *dev = link->priv;
191 unsigned int ioaddr = dev->base_addr;
194 /* This is based on drivers/net/ethernet/8390/ne.c */
196 u_char value, offset;
198 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
199 {0x01, EN0_DCFG}, /* Set word-wide access. */
200 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
202 {0x00, EN0_IMR}, /* Mask completion irq. */
204 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
205 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
208 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
210 {E8390_RREAD+E8390_START, E8390_CMD},
213 /* Not much of a test, but the alternatives are messy */
214 if (link->config_base != 0x03c0)
217 axnet_reset_8390(dev);
220 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
221 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
223 for (i = 0; i < 6; i += 2) {
224 j = inw(ioaddr + AXNET_DATAPORT);
225 dev->dev_addr[i] = j & 0xff;
226 dev->dev_addr[i+1] = j >> 8;
231 static int try_io_port(struct pcmcia_device *link)
234 link->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
235 link->resource[1]->flags &= ~IO_DATA_PATH_WIDTH;
236 if (link->resource[0]->end == 32) {
237 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
238 /* for master/slave multifunction cards */
239 if (link->resource[1]->end > 0)
240 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_8;
242 /* This should be two 16-port windows */
243 link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
244 link->resource[1]->flags |= IO_DATA_PATH_WIDTH_16;
246 if (link->resource[0]->start == 0) {
247 for (j = 0; j < 0x400; j += 0x20) {
248 link->resource[0]->start = j ^ 0x300;
249 link->resource[1]->start = (j ^ 0x300) + 0x10;
251 ret = pcmcia_request_io(link);
257 return pcmcia_request_io(link);
261 static int axnet_configcheck(struct pcmcia_device *p_dev, void *priv_data)
263 if (p_dev->config_index == 0)
266 p_dev->config_index = 0x05;
267 if (p_dev->resource[0]->end + p_dev->resource[1]->end < 32)
270 return try_io_port(p_dev);
273 static int axnet_config(struct pcmcia_device *link)
275 struct net_device *dev = link->priv;
276 struct axnet_dev *info = PRIV(dev);
279 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
281 /* don't trust the CIS on this; Linksys got it wrong */
282 link->config_regs = 0x63;
283 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
284 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
291 if (resource_size(link->resource[1]) == 8)
292 link->config_flags |= CONF_ENABLE_SPKR;
294 ret = pcmcia_enable_device(link);
298 dev->irq = link->irq;
299 dev->base_addr = link->resource[0]->start;
301 if (!get_prom(link)) {
302 pr_notice("this is not an AX88190 card!\n");
303 pr_notice("use pcnet_cs instead.\n");
307 ei_status.name = "AX88190";
308 ei_status.word16 = 1;
309 ei_status.tx_start_page = AXNET_START_PG;
310 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
311 ei_status.stop_page = AXNET_STOP_PG;
312 ei_status.reset_8390 = axnet_reset_8390;
313 ei_status.get_8390_hdr = get_8390_hdr;
314 ei_status.block_input = block_input;
315 ei_status.block_output = block_output;
317 if (inb(dev->base_addr + AXNET_TEST) != 0)
318 info->flags |= IS_AX88790;
320 info->flags |= IS_AX88190;
322 if (info->flags & IS_AX88790)
323 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
325 info->active_low = 0;
327 for (i = 0; i < 32; i++) {
328 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
329 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
330 if (j == j2) continue;
331 if ((j != 0) && (j != 0xffff)) break;
335 /* Maybe PHY is in power down mode. (PPD_SET = 1)
336 Bit 2 of CCSR is active low. */
337 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
338 for (i = 0; i < 32; i++) {
339 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
340 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
341 if (j == j2) continue;
342 if ((j != 0) && (j != 0xffff)) {
343 info->active_low = 1;
349 info->phy_id = (i < 32) ? i : -1;
350 SET_NETDEV_DEV(dev, &link->dev);
352 if (register_netdev(dev) != 0) {
353 pr_notice("register_netdev() failed\n");
357 netdev_info(dev, "Asix AX88%d90: io %#3lx, irq %d, hw_addr %pM\n",
358 ((info->flags & IS_AX88790) ? 7 : 1),
359 dev->base_addr, dev->irq, dev->dev_addr);
360 if (info->phy_id != -1) {
361 netdev_dbg(dev, " MII transceiver at index %d, status %x\n",
364 netdev_notice(dev, " No MII transceivers found!\n");
373 static void axnet_release(struct pcmcia_device *link)
375 pcmcia_disable_device(link);
378 static int axnet_suspend(struct pcmcia_device *link)
380 struct net_device *dev = link->priv;
383 netif_device_detach(dev);
388 static int axnet_resume(struct pcmcia_device *link)
390 struct net_device *dev = link->priv;
391 struct axnet_dev *info = PRIV(dev);
394 if (info->active_low == 1)
395 pcmcia_write_config_byte(link, CISREG_CCSR, 0x04);
397 axnet_reset_8390(dev);
398 AX88190_init(dev, 1);
399 netif_device_attach(dev);
406 /*======================================================================
408 MII interface support
410 ======================================================================*/
412 #define MDIO_SHIFT_CLK 0x01
413 #define MDIO_DATA_WRITE0 0x00
414 #define MDIO_DATA_WRITE1 0x08
415 #define MDIO_DATA_READ 0x04
416 #define MDIO_MASK 0x0f
417 #define MDIO_ENB_IN 0x02
419 static void mdio_sync(unsigned int addr)
422 for (bits = 0; bits < 32; bits++) {
423 outb_p(MDIO_DATA_WRITE1, addr);
424 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
428 static int mdio_read(unsigned int addr, int phy_id, int loc)
430 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
434 for (i = 14; i >= 0; i--) {
435 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
437 outb_p(dat | MDIO_SHIFT_CLK, addr);
439 for (i = 19; i > 0; i--) {
440 outb_p(MDIO_ENB_IN, addr);
441 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
442 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
444 return (retval>>1) & 0xffff;
447 static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
449 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
453 for (i = 31; i >= 0; i--) {
454 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
456 outb_p(dat | MDIO_SHIFT_CLK, addr);
458 for (i = 1; i >= 0; i--) {
459 outb_p(MDIO_ENB_IN, addr);
460 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
464 /*====================================================================*/
466 static int axnet_open(struct net_device *dev)
469 struct axnet_dev *info = PRIV(dev);
470 struct pcmcia_device *link = info->p_dev;
471 unsigned int nic_base = dev->base_addr;
473 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
475 if (!pcmcia_dev_present(link))
478 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
479 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
485 info->link_status = 0x00;
486 setup_timer(&info->watchdog, ei_watchdog, (u_long)dev);
487 mod_timer(&info->watchdog, jiffies + HZ);
492 /*====================================================================*/
494 static int axnet_close(struct net_device *dev)
496 struct axnet_dev *info = PRIV(dev);
497 struct pcmcia_device *link = info->p_dev;
499 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
502 free_irq(dev->irq, dev);
505 netif_stop_queue(dev);
506 del_timer_sync(&info->watchdog);
511 /*======================================================================
513 Hard reset the card. This used to pause for the same period that
514 a 8390 reset command required, but that shouldn't be necessary.
516 ======================================================================*/
518 static void axnet_reset_8390(struct net_device *dev)
520 unsigned int nic_base = dev->base_addr;
523 ei_status.txing = ei_status.dmaing = 0;
525 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
527 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
529 for (i = 0; i < 100; i++) {
530 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
534 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
537 netdev_err(dev, "axnet_reset_8390() did not complete\n");
539 } /* axnet_reset_8390 */
541 /*====================================================================*/
543 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
545 struct net_device *dev = dev_id;
546 PRIV(dev)->stale = 0;
547 return ax_interrupt(irq, dev_id);
550 static void ei_watchdog(u_long arg)
552 struct net_device *dev = (struct net_device *)(arg);
553 struct axnet_dev *info = PRIV(dev);
554 unsigned int nic_base = dev->base_addr;
555 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
558 if (!netif_device_present(dev)) goto reschedule;
560 /* Check for pending interrupt with expired latency timer: with
561 this, we can limp along even if the interrupt is blocked */
562 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
563 if (!info->fast_poll)
564 netdev_info(dev, "interrupt(s) dropped!\n");
565 ei_irq_wrapper(dev->irq, dev);
566 info->fast_poll = HZ;
568 if (info->fast_poll) {
570 info->watchdog.expires = jiffies + 1;
571 add_timer(&info->watchdog);
575 if (info->phy_id < 0)
577 link = mdio_read(mii_addr, info->phy_id, 1);
578 if (!link || (link == 0xffff)) {
579 netdev_info(dev, "MII is missing!\n");
585 if (link != info->link_status) {
586 u_short p = mdio_read(mii_addr, info->phy_id, 5);
587 netdev_info(dev, "%s link beat\n", link ? "found" : "lost");
589 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
591 netdev_info(dev, "autonegotiation complete: %dbaseT-%cD selected\n",
592 (p & 0x0180) ? 100 : 10, (p & 0x0140) ? 'F' : 'H');
594 netdev_info(dev, "link partner did not autonegotiate\n");
595 AX88190_init(dev, 1);
597 info->link_status = link;
601 info->watchdog.expires = jiffies + HZ;
602 add_timer(&info->watchdog);
605 /*====================================================================*/
607 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
609 struct axnet_dev *info = PRIV(dev);
610 struct mii_ioctl_data *data = if_mii(rq);
611 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
614 data->phy_id = info->phy_id;
615 case SIOCGMIIREG: /* Read MII PHY register. */
616 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
618 case SIOCSMIIREG: /* Write MII PHY register. */
619 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
625 /*====================================================================*/
627 static void get_8390_hdr(struct net_device *dev,
628 struct e8390_pkt_hdr *hdr,
631 unsigned int nic_base = dev->base_addr;
633 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
634 outb_p(ring_page, nic_base + EN0_RSARHI);
635 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
637 insw(nic_base + AXNET_DATAPORT, hdr,
638 sizeof(struct e8390_pkt_hdr)>>1);
639 /* Fix for big endian systems */
640 hdr->count = le16_to_cpu(hdr->count);
644 /*====================================================================*/
646 static void block_input(struct net_device *dev, int count,
647 struct sk_buff *skb, int ring_offset)
649 unsigned int nic_base = dev->base_addr;
650 struct ei_device *ei_local = netdev_priv(dev);
651 int xfer_count = count;
652 char *buf = skb->data;
654 if ((netif_msg_rx_status(ei_local)) && (count != 4))
655 netdev_dbg(dev, "[bi=%d]\n", count+4);
656 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
657 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
658 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
660 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
662 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
666 /*====================================================================*/
668 static void block_output(struct net_device *dev, int count,
669 const u_char *buf, const int start_page)
671 unsigned int nic_base = dev->base_addr;
673 pr_debug("%s: [bo=%d]\n", dev->name, count);
675 /* Round the count up for word writes. Do we need to do this?
676 What effect will an odd byte count have on the 8390?
677 I should check someday. */
681 outb_p(0x00, nic_base + EN0_RSARLO);
682 outb_p(start_page, nic_base + EN0_RSARHI);
683 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
684 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
687 static const struct pcmcia_device_id axnet_ids[] = {
688 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
689 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
690 PCMCIA_DEVICE_MANF_CARD(0x01bf, 0x2328),
691 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
692 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
693 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
694 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
695 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
696 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
697 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
698 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
699 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
700 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
701 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
702 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
703 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
704 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
705 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
706 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
707 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
708 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
709 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
710 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
711 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
712 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
713 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
714 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
715 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
718 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
720 static struct pcmcia_driver axnet_cs_driver = {
721 .owner = THIS_MODULE,
723 .probe = axnet_probe,
724 .remove = axnet_detach,
725 .id_table = axnet_ids,
726 .suspend = axnet_suspend,
727 .resume = axnet_resume,
729 module_pcmcia_driver(axnet_cs_driver);
731 /*====================================================================*/
733 /* 8390.c: A general NS8390 ethernet driver core for linux. */
735 Written 1992-94 by Donald Becker.
737 Copyright 1993 United States Government as represented by the
738 Director, National Security Agency.
740 This software may be used and distributed according to the terms
741 of the GNU General Public License, incorporated herein by reference.
743 The author may be reached as becker@scyld.com, or C/O
744 Scyld Computing Corporation
745 410 Severn Ave., Suite 210
748 This is the chip-specific code for many 8390-based ethernet adaptors.
749 This is not a complete driver, it must be combined with board-specific
750 code such as ne.c, wd.c, 3c503.c, etc.
752 Seeing how at least eight drivers use this code, (not counting the
753 PCMCIA ones either) it is easy to break some card by what seems like
754 a simple innocent change. Please contact me or Donald if you think
755 you have found something that needs changing. -- PG
759 Paul Gortmaker : remove set_bit lock, other cleanups.
760 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
761 ei_block_input() for eth_io_copy_and_sum().
762 Paul Gortmaker : exchange static int ei_pingpong for a #define,
763 also add better Tx error handling.
764 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
765 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
766 Paul Gortmaker : tweak ANK's above multicast changes a bit.
767 Paul Gortmaker : update packet statistics for v2.1.x
768 Alan Cox : support arbitrary stupid port mappings on the
769 68K Macintosh. Support >16bit I/O spaces
770 Paul Gortmaker : add kmod support for auto-loading of the 8390
771 module by all drivers that require it.
772 Alan Cox : Spinlocking work, added 'BUG_83C690'
773 Paul Gortmaker : Separate out Tx timeout code from Tx path.
776 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
780 #include <linux/bitops.h>
782 #include <linux/fcntl.h>
783 #include <linux/in.h>
784 #include <linux/interrupt.h>
788 /* These are the operational function interfaces to board-specific
790 void reset_8390(struct net_device *dev)
791 Resets the board associated with DEV, including a hardware reset of
792 the 8390. This is only called when there is a transmit timeout, and
793 it is always followed by 8390_init().
794 void block_output(struct net_device *dev, int count, const unsigned char *buf,
796 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
797 "page" value uses the 8390's 256-byte pages.
798 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
799 Read the 4 byte, page aligned 8390 header. *If* there is a
800 subsequent read, it will be of the rest of the packet.
801 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
802 Read COUNT bytes from the packet buffer into the skb data area. Start
803 reading from RING_OFFSET, the address as the 8390 sees it. This will always
804 follow the read of the 8390 header.
806 #define ei_reset_8390 (ei_local->reset_8390)
807 #define ei_block_output (ei_local->block_output)
808 #define ei_block_input (ei_local->block_input)
809 #define ei_get_8390_hdr (ei_local->get_8390_hdr)
811 /* Index to functions. */
812 static void ei_tx_intr(struct net_device *dev);
813 static void ei_tx_err(struct net_device *dev);
814 static void ei_receive(struct net_device *dev);
815 static void ei_rx_overrun(struct net_device *dev);
817 /* Routines generic to NS8390-based boards. */
818 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
820 static void do_set_multicast_list(struct net_device *dev);
823 * SMP and the 8390 setup.
825 * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
826 * a page register that controls bank and packet buffer access. We guard
827 * this with ei_local->page_lock. Nobody should assume or set the page other
828 * than zero when the lock is not held. Lock holders must restore page 0
829 * before unlocking. Even pure readers must take the lock to protect in
832 * To make life difficult the chip can also be very slow. We therefore can't
833 * just use spinlocks. For the longer lockups we disable the irq the device
834 * sits on and hold the lock. We must hold the lock because there is a dual
835 * processor case other than interrupts (get stats/set multicast list in
836 * parallel with each other and transmit).
838 * Note: in theory we can just disable the irq on the card _but_ there is
839 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
840 * enter lock, take the queued irq. So we waddle instead of flying.
842 * Finally by special arrangement for the purpose of being generally
843 * annoying the transmit function is called bh atomic. That places
844 * restrictions on the user context callers as disable_irq won't save
849 * ax_open - Open/initialize the board.
850 * @dev: network device to initialize
852 * This routine goes all-out, setting everything
853 * up anew at each open, even though many of these registers should only
854 * need to be set once at boot.
856 static int ax_open(struct net_device *dev)
859 struct ei_device *ei_local = netdev_priv(dev);
862 * Grab the page lock so we own the register set, then call
866 spin_lock_irqsave(&ei_local->page_lock, flags);
867 AX88190_init(dev, 1);
868 /* Set the flag before we drop the lock, That way the IRQ arrives
869 after its set and we get no silly warnings */
870 netif_start_queue(dev);
871 spin_unlock_irqrestore(&ei_local->page_lock, flags);
872 ei_local->irqlock = 0;
876 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
879 * ax_close - shut down network device
880 * @dev: network device to close
882 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
884 static int ax_close(struct net_device *dev)
889 * Hold the page lock during close
892 spin_lock_irqsave(&dev_lock(dev), flags);
893 AX88190_init(dev, 0);
894 spin_unlock_irqrestore(&dev_lock(dev), flags);
895 netif_stop_queue(dev);
900 * axnet_tx_timeout - handle transmit time out condition
901 * @dev: network device which has apparently fallen asleep
903 * Called by kernel when device never acknowledges a transmit has
904 * completed (or failed) - i.e. never posted a Tx related interrupt.
907 static void axnet_tx_timeout(struct net_device *dev)
909 long e8390_base = dev->base_addr;
910 struct ei_device *ei_local = netdev_priv(dev);
911 int txsr, isr, tickssofar = jiffies - dev_trans_start(dev);
914 dev->stats.tx_errors++;
916 spin_lock_irqsave(&ei_local->page_lock, flags);
917 txsr = inb(e8390_base+EN0_TSR);
918 isr = inb(e8390_base+EN0_ISR);
919 spin_unlock_irqrestore(&ei_local->page_lock, flags);
921 netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
922 (txsr & ENTSR_ABT) ? "excess collisions." :
923 (isr) ? "lost interrupt?" : "cable problem?",
924 txsr, isr, tickssofar);
926 if (!isr && !dev->stats.tx_packets)
928 /* The 8390 probably hasn't gotten on the cable yet. */
929 ei_local->interface_num ^= 1; /* Try a different xcvr. */
932 /* Ugly but a reset can be slow, yet must be protected */
934 spin_lock_irqsave(&ei_local->page_lock, flags);
936 /* Try to restart the card. Perhaps the user has fixed something. */
938 AX88190_init(dev, 1);
940 spin_unlock_irqrestore(&ei_local->page_lock, flags);
941 netif_wake_queue(dev);
945 * axnet_start_xmit - begin packet transmission
946 * @skb: packet to be sent
947 * @dev: network device to which packet is sent
949 * Sends a packet to an 8390 network device.
952 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
953 struct net_device *dev)
955 long e8390_base = dev->base_addr;
956 struct ei_device *ei_local = netdev_priv(dev);
957 int length, send_length, output_page;
961 netif_stop_queue(dev);
965 /* Mask interrupts from the ethercard.
966 SMP: We have to grab the lock here otherwise the IRQ handler
967 on another CPU can flip window and race the IRQ mask set. We end
968 up trashing the mcast filter not disabling irqs if we don't lock */
970 spin_lock_irqsave(&ei_local->page_lock, flags);
971 outb_p(0x00, e8390_base + EN0_IMR);
974 * Slow phase with lock held.
977 ei_local->irqlock = 1;
979 send_length = max(length, ETH_ZLEN);
982 * We have two Tx slots available for use. Find the first free
983 * slot, and then perform some sanity checks. With two Tx bufs,
984 * you get very close to transmitting back-to-back packets. With
985 * only one Tx buf, the transmitter sits idle while you reload the
986 * card, leaving a substantial gap between each transmitted packet.
989 if (ei_local->tx1 == 0)
991 output_page = ei_local->tx_start_page;
992 ei_local->tx1 = send_length;
993 if ((netif_msg_tx_queued(ei_local)) &&
996 "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
997 ei_local->tx2, ei_local->lasttx,
1000 else if (ei_local->tx2 == 0)
1002 output_page = ei_local->tx_start_page + TX_PAGES/2;
1003 ei_local->tx2 = send_length;
1004 if ((netif_msg_tx_queued(ei_local)) &&
1007 "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
1008 ei_local->tx1, ei_local->lasttx,
1012 { /* We should never get here. */
1013 netif_dbg(ei_local, tx_err, dev,
1014 "No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1015 ei_local->tx1, ei_local->tx2,
1017 ei_local->irqlock = 0;
1018 netif_stop_queue(dev);
1019 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1020 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1021 dev->stats.tx_errors++;
1022 return NETDEV_TX_BUSY;
1026 * Okay, now upload the packet and trigger a send if the transmitter
1027 * isn't already sending. If it is busy, the interrupt handler will
1028 * trigger the send later, upon receiving a Tx done interrupt.
1031 if (length == skb->len)
1032 ei_block_output(dev, length, skb->data, output_page);
1034 memset(packet, 0, ETH_ZLEN);
1035 skb_copy_from_linear_data(skb, packet, skb->len);
1036 ei_block_output(dev, length, packet, output_page);
1039 if (! ei_local->txing)
1041 ei_local->txing = 1;
1042 NS8390_trigger_send(dev, send_length, output_page);
1043 netif_trans_update(dev);
1044 if (output_page == ei_local->tx_start_page)
1047 ei_local->lasttx = -1;
1052 ei_local->lasttx = -2;
1055 else ei_local->txqueue++;
1057 if (ei_local->tx1 && ei_local->tx2)
1058 netif_stop_queue(dev);
1060 netif_start_queue(dev);
1062 /* Turn 8390 interrupts back on. */
1063 ei_local->irqlock = 0;
1064 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1066 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1068 dev_kfree_skb (skb);
1069 dev->stats.tx_bytes += send_length;
1071 return NETDEV_TX_OK;
1075 * ax_interrupt - handle the interrupts from an 8390
1076 * @irq: interrupt number
1077 * @dev_id: a pointer to the net_device
1079 * Handle the ether interface interrupts. We pull packets from
1080 * the 8390 via the card specific functions and fire them at the networking
1081 * stack. We also handle transmit completions and wake the transmit path if
1082 * necessary. We also update the counters and do other housekeeping as
1086 static irqreturn_t ax_interrupt(int irq, void *dev_id)
1088 struct net_device *dev = dev_id;
1090 int interrupts, nr_serviced = 0, i;
1091 struct ei_device *ei_local;
1093 unsigned long flags;
1095 e8390_base = dev->base_addr;
1096 ei_local = netdev_priv(dev);
1099 * Protect the irq test too.
1102 spin_lock_irqsave(&ei_local->page_lock, flags);
1104 if (ei_local->irqlock) {
1105 #if 1 /* This might just be an interrupt for a PCI device sharing this line */
1107 /* The "irqlock" check is only for testing. */
1108 if (ei_local->irqlock)
1109 msg = "Interrupted while interrupts are masked!";
1111 msg = "Reentering the interrupt handler!";
1112 netdev_info(dev, "%s, isr=%#2x imr=%#2x\n",
1114 inb_p(e8390_base + EN0_ISR),
1115 inb_p(e8390_base + EN0_IMR));
1117 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1121 netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
1122 inb_p(e8390_base + EN0_ISR));
1124 outb_p(0x00, e8390_base + EN0_ISR);
1125 ei_local->irqlock = 1;
1127 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1128 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1129 ++nr_serviced < MAX_SERVICE)
1131 if (!netif_running(dev) || (interrupts == 0xff)) {
1132 netif_warn(ei_local, intr, dev,
1133 "interrupt from stopped card\n");
1134 outb_p(interrupts, e8390_base + EN0_ISR);
1140 /* AX88190 bug fix. */
1141 outb_p(interrupts, e8390_base + EN0_ISR);
1142 for (i = 0; i < 10; i++) {
1143 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1145 outb_p(0, e8390_base + EN0_ISR);
1146 outb_p(interrupts, e8390_base + EN0_ISR);
1148 if (interrupts & ENISR_OVER)
1150 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1152 /* Got a good (?) packet. */
1155 /* Push the next to-transmit packet through. */
1156 if (interrupts & ENISR_TX)
1158 else if (interrupts & ENISR_TX_ERR)
1161 if (interrupts & ENISR_COUNTERS)
1163 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1164 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1165 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1169 if (interrupts && (netif_msg_intr(ei_local)))
1172 if (nr_serviced >= MAX_SERVICE)
1174 /* 0xFF is valid for a card removal */
1175 if (interrupts != 0xFF)
1177 "Too much work at interrupt, status %#2.2x\n",
1179 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1181 netdev_warn(dev, "unknown interrupt %#2x\n",
1183 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1187 /* Turn 8390 interrupts back on. */
1188 ei_local->irqlock = 0;
1189 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1191 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1192 return IRQ_RETVAL(handled);
1196 * ei_tx_err - handle transmitter error
1197 * @dev: network device which threw the exception
1199 * A transmitter error has happened. Most likely excess collisions (which
1200 * is a fairly normal condition). If the error is one where the Tx will
1201 * have been aborted, we try and send another one right away, instead of
1202 * letting the failed packet sit and collect dust in the Tx buffer. This
1203 * is a much better solution as it avoids kernel based Tx timeouts, and
1204 * an unnecessary card reset.
1206 * Called with lock held.
1209 static void ei_tx_err(struct net_device *dev)
1211 long e8390_base = dev->base_addr;
1212 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1213 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1215 #ifdef VERBOSE_ERROR_DUMP
1216 netdev_dbg(dev, "transmitter error (%#2x):", txsr);
1217 if (txsr & ENTSR_ABT)
1218 pr_cont(" excess-collisions");
1219 if (txsr & ENTSR_ND)
1220 pr_cont(" non-deferral");
1221 if (txsr & ENTSR_CRS)
1222 pr_cont(" lost-carrier");
1223 if (txsr & ENTSR_FU)
1224 pr_cont(" FIFO-underrun");
1225 if (txsr & ENTSR_CDH)
1226 pr_cont(" lost-heartbeat");
1234 dev->stats.tx_errors++;
1235 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1236 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1237 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1242 * ei_tx_intr - transmit interrupt handler
1243 * @dev: network device for which tx intr is handled
1245 * We have finished a transmit: check for errors and then trigger the next
1246 * packet to be sent. Called with lock held.
1249 static void ei_tx_intr(struct net_device *dev)
1251 long e8390_base = dev->base_addr;
1252 struct ei_device *ei_local = netdev_priv(dev);
1253 int status = inb(e8390_base + EN0_TSR);
1256 * There are two Tx buffers, see which one finished, and trigger
1257 * the send of another one if it exists.
1259 ei_local->txqueue--;
1261 if (ei_local->tx1 < 0)
1263 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1264 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx1=%d\n",
1265 ei_local->name, ei_local->lasttx,
1268 if (ei_local->tx2 > 0)
1270 ei_local->txing = 1;
1271 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1272 netif_trans_update(dev);
1274 ei_local->lasttx = 2;
1276 else ei_local->lasttx = 20, ei_local->txing = 0;
1278 else if (ei_local->tx2 < 0)
1280 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1281 netdev_err(dev, "%s: bogus last_tx_buffer %d, tx2=%d\n",
1282 ei_local->name, ei_local->lasttx,
1285 if (ei_local->tx1 > 0)
1287 ei_local->txing = 1;
1288 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1289 netif_trans_update(dev);
1291 ei_local->lasttx = 1;
1294 ei_local->lasttx = 10, ei_local->txing = 0;
1297 // netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
1298 // ei_local->lasttx);
1300 /* Minimize Tx latency: update the statistics after we restart TXing. */
1301 if (status & ENTSR_COL)
1302 dev->stats.collisions++;
1303 if (status & ENTSR_PTX)
1304 dev->stats.tx_packets++;
1307 dev->stats.tx_errors++;
1308 if (status & ENTSR_ABT)
1310 dev->stats.tx_aborted_errors++;
1311 dev->stats.collisions += 16;
1313 if (status & ENTSR_CRS)
1314 dev->stats.tx_carrier_errors++;
1315 if (status & ENTSR_FU)
1316 dev->stats.tx_fifo_errors++;
1317 if (status & ENTSR_CDH)
1318 dev->stats.tx_heartbeat_errors++;
1319 if (status & ENTSR_OWC)
1320 dev->stats.tx_window_errors++;
1322 netif_wake_queue(dev);
1326 * ei_receive - receive some packets
1327 * @dev: network device with which receive will be run
1329 * We have a good packet(s), get it/them out of the buffers.
1330 * Called with lock held.
1333 static void ei_receive(struct net_device *dev)
1335 long e8390_base = dev->base_addr;
1336 struct ei_device *ei_local = netdev_priv(dev);
1337 unsigned char rxing_page, this_frame, next_frame;
1338 unsigned short current_offset;
1339 int rx_pkt_count = 0;
1340 struct e8390_pkt_hdr rx_frame;
1342 while (++rx_pkt_count < 10)
1344 int pkt_len, pkt_stat;
1346 /* Get the rx page (incoming packet pointer). */
1347 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1349 /* Remove one frame from the ring. Boundary is always a page behind. */
1350 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1351 if (this_frame >= ei_local->stop_page)
1352 this_frame = ei_local->rx_start_page;
1354 /* Someday we'll omit the previous, iff we never get this message.
1355 (There is at least one clone claimed to have a problem.)
1357 Keep quiet if it looks like a card removal. One problem here
1358 is that some clones crash in roughly the same way.
1360 if ((netif_msg_rx_err(ei_local)) &&
1361 this_frame != ei_local->current_page &&
1362 (this_frame != 0x0 || rxing_page != 0xFF))
1363 netdev_err(dev, "mismatched read page pointers %2x vs %2x\n",
1364 this_frame, ei_local->current_page);
1366 if (this_frame == rxing_page) /* Read all the frames? */
1367 break; /* Done for now */
1369 current_offset = this_frame << 8;
1370 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1372 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1373 pkt_stat = rx_frame.status;
1375 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1377 if (pkt_len < 60 || pkt_len > 1518)
1379 netif_err(ei_local, rx_err, dev,
1380 "bogus packet size: %d, status=%#2x nxpg=%#2x\n",
1381 rx_frame.count, rx_frame.status,
1383 dev->stats.rx_errors++;
1384 dev->stats.rx_length_errors++;
1386 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1388 struct sk_buff *skb;
1390 skb = netdev_alloc_skb(dev, pkt_len + 2);
1393 netif_err(ei_local, rx_err, dev,
1394 "Couldn't allocate a sk_buff of size %d\n",
1396 dev->stats.rx_dropped++;
1401 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1402 skb_put(skb, pkt_len); /* Make room */
1403 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1404 skb->protocol=eth_type_trans(skb,dev);
1406 dev->stats.rx_packets++;
1407 dev->stats.rx_bytes += pkt_len;
1408 if (pkt_stat & ENRSR_PHY)
1409 dev->stats.multicast++;
1414 netif_err(ei_local, rx_err, dev,
1415 "bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1416 rx_frame.status, rx_frame.next,
1418 dev->stats.rx_errors++;
1419 /* NB: The NIC counts CRC, frame and missed errors. */
1420 if (pkt_stat & ENRSR_FO)
1421 dev->stats.rx_fifo_errors++;
1423 next_frame = rx_frame.next;
1425 /* This _should_ never happen: it's here for avoiding bad clones. */
1426 if (next_frame >= ei_local->stop_page) {
1427 netdev_info(dev, "next frame inconsistency, %#2x\n",
1429 next_frame = ei_local->rx_start_page;
1431 ei_local->current_page = next_frame;
1432 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1437 * ei_rx_overrun - handle receiver overrun
1438 * @dev: network device which threw exception
1440 * We have a receiver overrun: we have to kick the 8390 to get it started
1441 * again. Problem is that you have to kick it exactly as NS prescribes in
1442 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1443 * This includes causing "the NIC to defer indefinitely when it is stopped
1444 * on a busy network." Ugh.
1445 * Called with lock held. Don't call this with the interrupts off or your
1446 * computer will hate you - it takes 10ms or so.
1449 static void ei_rx_overrun(struct net_device *dev)
1451 struct axnet_dev *info = PRIV(dev);
1452 long e8390_base = dev->base_addr;
1453 unsigned char was_txing, must_resend = 0;
1454 struct ei_device *ei_local = netdev_priv(dev);
1457 * Record whether a Tx was in progress and then issue the
1460 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1461 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1463 netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
1464 dev->stats.rx_over_errors++;
1467 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1468 * We wait at least 2ms.
1474 * Reset RBCR[01] back to zero as per magic incantation.
1476 outb_p(0x00, e8390_base+EN0_RCNTLO);
1477 outb_p(0x00, e8390_base+EN0_RCNTHI);
1480 * See if any Tx was interrupted or not. According to NS, this
1481 * step is vital, and skipping it will cause no end of havoc.
1486 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1492 * Have to enter loopback mode and then restart the NIC before
1493 * you are allowed to slurp packets up off the ring.
1495 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1496 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1499 * Clear the Rx ring of all the debris, and ack the interrupt.
1504 * Leave loopback mode, and resend any packet that got stopped.
1506 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1508 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1512 * Collect the stats. This is called unlocked and from several contexts.
1515 static struct net_device_stats *get_stats(struct net_device *dev)
1517 long ioaddr = dev->base_addr;
1518 struct ei_device *ei_local = netdev_priv(dev);
1519 unsigned long flags;
1521 /* If the card is stopped, just return the present stats. */
1522 if (!netif_running(dev))
1525 spin_lock_irqsave(&ei_local->page_lock,flags);
1526 /* Read the counter registers, assuming we are in page 0. */
1527 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1528 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1529 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1530 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1536 * Form the 64 bit 8390 multicast table from the linked list of addresses
1537 * associated with this dev structure.
1540 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1542 struct netdev_hw_addr *ha;
1545 netdev_for_each_mc_addr(ha, dev) {
1546 crc = ether_crc(ETH_ALEN, ha->addr);
1548 * The 8390 uses the 6 most significant bits of the
1549 * CRC to index the multicast table.
1551 bits[crc>>29] |= (1<<((crc>>26)&7));
1556 * do_set_multicast_list - set/clear multicast filter
1557 * @dev: net device for which multicast filter is adjusted
1559 * Set or clear the multicast filter for this adaptor.
1560 * Must be called with lock held.
1563 static void do_set_multicast_list(struct net_device *dev)
1565 long e8390_base = dev->base_addr;
1567 struct ei_device *ei_local = netdev_priv(dev);
1569 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1570 memset(ei_local->mcfilter, 0, 8);
1571 if (!netdev_mc_empty(dev))
1572 make_mc_bits(ei_local->mcfilter, dev);
1574 /* set to accept-all */
1575 memset(ei_local->mcfilter, 0xFF, 8);
1578 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1579 for(i = 0; i < 8; i++)
1581 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1583 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1585 if(dev->flags&IFF_PROMISC)
1586 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1587 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1588 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1590 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1592 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1596 * Called without lock held. This is invoked from user context and may
1597 * be parallel to just about everything else. Its also fairly quick and
1598 * not called too often. Must protect against both bh and irq users
1601 static void set_multicast_list(struct net_device *dev)
1603 unsigned long flags;
1605 spin_lock_irqsave(&dev_lock(dev), flags);
1606 do_set_multicast_list(dev);
1607 spin_unlock_irqrestore(&dev_lock(dev), flags);
1610 /* This page of functions should be 8390 generic */
1611 /* Follow National Semi's recommendations for initializing the "NIC". */
1614 * AX88190_init - initialize 8390 hardware
1615 * @dev: network device to initialize
1616 * @startp: boolean. non-zero value to initiate chip processing
1618 * Must be called with lock held.
1621 static void AX88190_init(struct net_device *dev, int startp)
1623 struct axnet_dev *info = PRIV(dev);
1624 long e8390_base = dev->base_addr;
1625 struct ei_device *ei_local = netdev_priv(dev);
1627 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1629 if(sizeof(struct e8390_pkt_hdr)!=4)
1630 panic("8390.c: header struct mispacked\n");
1631 /* Follow National Semi's recommendations for initing the DP83902. */
1632 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1633 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1634 /* Clear the remote byte count registers. */
1635 outb_p(0x00, e8390_base + EN0_RCNTLO);
1636 outb_p(0x00, e8390_base + EN0_RCNTHI);
1637 /* Set to monitor and loopback mode -- this is vital!. */
1638 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1639 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1640 /* Set the transmit page and receive ring. */
1641 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1642 ei_local->tx1 = ei_local->tx2 = 0;
1643 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1644 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1645 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1646 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1647 /* Clear the pending interrupts and mask. */
1648 outb_p(0xFF, e8390_base + EN0_ISR);
1649 outb_p(0x00, e8390_base + EN0_IMR);
1651 /* Copy the station address into the DS8390 registers. */
1653 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1654 for(i = 0; i < 6; i++)
1656 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1657 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1658 netdev_err(dev, "Hw. address read/write mismap %d\n", i);
1661 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1662 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1664 netif_start_queue(dev);
1665 ei_local->tx1 = ei_local->tx2 = 0;
1666 ei_local->txing = 0;
1668 if (info->flags & IS_AX88790) /* select Internal PHY */
1669 outb(0x10, e8390_base + AXNET_GPIO);
1673 outb_p(0xff, e8390_base + EN0_ISR);
1674 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1675 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1676 outb_p(E8390_TXCONFIG | info->duplex_flag,
1677 e8390_base + EN0_TXCR); /* xmit on. */
1678 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1679 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1680 do_set_multicast_list(dev); /* (re)load the mcast table */
1684 /* Trigger a transmit start, assuming the length is valid.
1685 Always called with the page lock held */
1687 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1690 long e8390_base = dev->base_addr;
1691 struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
1693 if (inb_p(e8390_base) & E8390_TRANS)
1695 netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
1698 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1699 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1700 outb_p(start_page, e8390_base + EN0_TPSR);
1701 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);