Staging: netwave: delete the driver
[linux/fpc-iii.git] / drivers / net / pcmcia / axnet_cs.c
blob9f3d593f14edba92882e3283fcadcfccfa371f64
1 /*======================================================================
3 A PCMCIA ethernet driver for Asix AX88190-based cards
5 The Asix AX88190 is a NS8390-derived chipset with a few nasty
6 idiosyncracies that make it very inconvenient to support with a
7 standard 8390 driver. This driver is based on pcnet_cs, with the
8 tweaked 8390 code grafted on the end. Much of what I did was to
9 clean up and update a similar driver supplied by Asix, which was
10 adapted by William Lee, william@asix.com.tw.
12 Copyright (C) 2001 David A. Hinds -- dahinds@users.sourceforge.net
14 axnet_cs.c 1.28 2002/06/29 06:27:37
16 The network driver code is based on Donald Becker's NE2000 code:
18 Written 1992,1993 by Donald Becker.
19 Copyright 1993 United States Government as represented by the
20 Director, National Security Agency. This software may be used and
21 distributed according to the terms of the GNU General Public License,
22 incorporated herein by reference.
23 Donald Becker may be reached at becker@scyld.com
25 ======================================================================*/
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/ptrace.h>
31 #include <linux/string.h>
32 #include <linux/timer.h>
33 #include <linux/delay.h>
34 #include <linux/spinlock.h>
35 #include <linux/ethtool.h>
36 #include <linux/netdevice.h>
37 #include <linux/etherdevice.h>
38 #include <linux/crc32.h>
39 #include <linux/mii.h>
40 #include "../8390.h"
42 #include <pcmcia/cs_types.h>
43 #include <pcmcia/cs.h>
44 #include <pcmcia/cistpl.h>
45 #include <pcmcia/ciscode.h>
46 #include <pcmcia/ds.h>
47 #include <pcmcia/cisreg.h>
49 #include <asm/io.h>
50 #include <asm/system.h>
51 #include <asm/byteorder.h>
52 #include <asm/uaccess.h>
54 #define AXNET_CMD 0x00
55 #define AXNET_DATAPORT 0x10 /* NatSemi-defined port window offset. */
56 #define AXNET_RESET 0x1f /* Issue a read to reset, a write to clear. */
57 #define AXNET_MII_EEP 0x14 /* Offset of MII access port */
58 #define AXNET_TEST 0x15 /* Offset of TEST Register port */
59 #define AXNET_GPIO 0x17 /* Offset of General Purpose Register Port */
61 #define AXNET_START_PG 0x40 /* First page of TX buffer */
62 #define AXNET_STOP_PG 0x80 /* Last page +1 of RX ring */
64 #define AXNET_RDC_TIMEOUT 0x02 /* Max wait in jiffies for Tx RDC */
66 #define IS_AX88190 0x0001
67 #define IS_AX88790 0x0002
69 /*====================================================================*/
71 /* Module parameters */
73 MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>");
74 MODULE_DESCRIPTION("Asix AX88190 PCMCIA ethernet driver");
75 MODULE_LICENSE("GPL");
78 /*====================================================================*/
80 static int axnet_config(struct pcmcia_device *link);
81 static void axnet_release(struct pcmcia_device *link);
82 static int axnet_open(struct net_device *dev);
83 static int axnet_close(struct net_device *dev);
84 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
85 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
86 struct net_device *dev);
87 static struct net_device_stats *get_stats(struct net_device *dev);
88 static void set_multicast_list(struct net_device *dev);
89 static void axnet_tx_timeout(struct net_device *dev);
90 static const struct ethtool_ops netdev_ethtool_ops;
91 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id);
92 static void ei_watchdog(u_long arg);
93 static void axnet_reset_8390(struct net_device *dev);
95 static int mdio_read(unsigned int addr, int phy_id, int loc);
96 static void mdio_write(unsigned int addr, int phy_id, int loc, int value);
98 static void get_8390_hdr(struct net_device *,
99 struct e8390_pkt_hdr *, int);
100 static void block_input(struct net_device *dev, int count,
101 struct sk_buff *skb, int ring_offset);
102 static void block_output(struct net_device *dev, int count,
103 const u_char *buf, const int start_page);
105 static void axnet_detach(struct pcmcia_device *p_dev);
107 static void AX88190_init(struct net_device *dev, int startp);
108 static int ax_open(struct net_device *dev);
109 static int ax_close(struct net_device *dev);
110 static irqreturn_t ax_interrupt(int irq, void *dev_id);
112 /*====================================================================*/
114 typedef struct axnet_dev_t {
115 struct pcmcia_device *p_dev;
116 dev_node_t node;
117 caddr_t base;
118 struct timer_list watchdog;
119 int stale, fast_poll;
120 u_short link_status;
121 u_char duplex_flag;
122 int phy_id;
123 int flags;
124 } axnet_dev_t;
126 static inline axnet_dev_t *PRIV(struct net_device *dev)
128 void *p = (char *)netdev_priv(dev) + sizeof(struct ei_device);
129 return p;
132 static const struct net_device_ops axnet_netdev_ops = {
133 .ndo_open = axnet_open,
134 .ndo_stop = axnet_close,
135 .ndo_do_ioctl = axnet_ioctl,
136 .ndo_start_xmit = axnet_start_xmit,
137 .ndo_tx_timeout = axnet_tx_timeout,
138 .ndo_get_stats = get_stats,
139 .ndo_set_multicast_list = set_multicast_list,
140 .ndo_change_mtu = eth_change_mtu,
141 .ndo_set_mac_address = eth_mac_addr,
142 .ndo_validate_addr = eth_validate_addr,
145 /*======================================================================
147 axnet_attach() creates an "instance" of the driver, allocating
148 local data structures for one device. The device is registered
149 with Card Services.
151 ======================================================================*/
153 static int axnet_probe(struct pcmcia_device *link)
155 axnet_dev_t *info;
156 struct net_device *dev;
157 struct ei_device *ei_local;
159 dev_dbg(&link->dev, "axnet_attach()\n");
161 dev = alloc_etherdev(sizeof(struct ei_device) + sizeof(axnet_dev_t));
162 if (!dev)
163 return -ENOMEM;
165 ei_local = netdev_priv(dev);
166 spin_lock_init(&ei_local->page_lock);
168 info = PRIV(dev);
169 info->p_dev = link;
170 link->priv = dev;
171 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
172 link->conf.Attributes = CONF_ENABLE_IRQ;
173 link->conf.IntType = INT_MEMORY_AND_IO;
175 dev->netdev_ops = &axnet_netdev_ops;
177 SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);
178 dev->watchdog_timeo = TX_TIMEOUT;
180 return axnet_config(link);
181 } /* axnet_attach */
183 /*======================================================================
185 This deletes a driver "instance". The device is de-registered
186 with Card Services. If it has been released, all local data
187 structures are freed. Otherwise, the structures will be freed
188 when the device is released.
190 ======================================================================*/
192 static void axnet_detach(struct pcmcia_device *link)
194 struct net_device *dev = link->priv;
196 dev_dbg(&link->dev, "axnet_detach(0x%p)\n", link);
198 if (link->dev_node)
199 unregister_netdev(dev);
201 axnet_release(link);
203 free_netdev(dev);
204 } /* axnet_detach */
206 /*======================================================================
208 This probes for a card's hardware address by reading the PROM.
210 ======================================================================*/
212 static int get_prom(struct pcmcia_device *link)
214 struct net_device *dev = link->priv;
215 unsigned int ioaddr = dev->base_addr;
216 int i, j;
218 /* This is based on drivers/net/ne.c */
219 struct {
220 u_char value, offset;
221 } program_seq[] = {
222 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
223 {0x01, EN0_DCFG}, /* Set word-wide access. */
224 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
225 {0x00, EN0_RCNTHI},
226 {0x00, EN0_IMR}, /* Mask completion irq. */
227 {0xFF, EN0_ISR},
228 {E8390_RXOFF|0x40, EN0_RXCR}, /* 0x60 Set to monitor */
229 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
230 {0x10, EN0_RCNTLO},
231 {0x00, EN0_RCNTHI},
232 {0x00, EN0_RSARLO}, /* DMA starting at 0x0400. */
233 {0x04, EN0_RSARHI},
234 {E8390_RREAD+E8390_START, E8390_CMD},
237 /* Not much of a test, but the alternatives are messy */
238 if (link->conf.ConfigBase != 0x03c0)
239 return 0;
241 axnet_reset_8390(dev);
242 mdelay(10);
244 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
245 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
247 for (i = 0; i < 6; i += 2) {
248 j = inw(ioaddr + AXNET_DATAPORT);
249 dev->dev_addr[i] = j & 0xff;
250 dev->dev_addr[i+1] = j >> 8;
252 return 1;
253 } /* get_prom */
255 /*======================================================================
257 axnet_config() is scheduled to run after a CARD_INSERTION event
258 is received, to configure the PCMCIA socket, and to make the
259 ethernet device available to the system.
261 ======================================================================*/
263 static int try_io_port(struct pcmcia_device *link)
265 int j, ret;
266 if (link->io.NumPorts1 == 32) {
267 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
268 if (link->io.NumPorts2 > 0) {
269 /* for master/slave multifunction cards */
270 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
271 link->irq.Attributes =
272 IRQ_TYPE_DYNAMIC_SHARING;
274 } else {
275 /* This should be two 16-port windows */
276 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
277 link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
279 if (link->io.BasePort1 == 0) {
280 link->io.IOAddrLines = 16;
281 for (j = 0; j < 0x400; j += 0x20) {
282 link->io.BasePort1 = j ^ 0x300;
283 link->io.BasePort2 = (j ^ 0x300) + 0x10;
284 ret = pcmcia_request_io(link, &link->io);
285 if (ret == 0)
286 return ret;
288 return ret;
289 } else {
290 return pcmcia_request_io(link, &link->io);
294 static int axnet_configcheck(struct pcmcia_device *p_dev,
295 cistpl_cftable_entry_t *cfg,
296 cistpl_cftable_entry_t *dflt,
297 unsigned int vcc,
298 void *priv_data)
300 int i;
301 cistpl_io_t *io = &cfg->io;
303 if (cfg->index == 0 || cfg->io.nwin == 0)
304 return -ENODEV;
306 p_dev->conf.ConfigIndex = 0x05;
307 /* For multifunction cards, by convention, we configure the
308 network function with window 0, and serial with window 1 */
309 if (io->nwin > 1) {
310 i = (io->win[1].len > io->win[0].len);
311 p_dev->io.BasePort2 = io->win[1-i].base;
312 p_dev->io.NumPorts2 = io->win[1-i].len;
313 } else {
314 i = p_dev->io.NumPorts2 = 0;
316 p_dev->io.BasePort1 = io->win[i].base;
317 p_dev->io.NumPorts1 = io->win[i].len;
318 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
319 if (p_dev->io.NumPorts1 + p_dev->io.NumPorts2 >= 32)
320 return try_io_port(p_dev);
322 return -ENODEV;
325 static int axnet_config(struct pcmcia_device *link)
327 struct net_device *dev = link->priv;
328 axnet_dev_t *info = PRIV(dev);
329 int i, j, j2, ret;
331 dev_dbg(&link->dev, "axnet_config(0x%p)\n", link);
333 /* don't trust the CIS on this; Linksys got it wrong */
334 link->conf.Present = 0x63;
335 ret = pcmcia_loop_config(link, axnet_configcheck, NULL);
336 if (ret != 0)
337 goto failed;
339 ret = pcmcia_request_irq(link, &link->irq);
340 if (ret)
341 goto failed;
343 if (link->io.NumPorts2 == 8) {
344 link->conf.Attributes |= CONF_ENABLE_SPKR;
345 link->conf.Status = CCSR_AUDIO_ENA;
348 ret = pcmcia_request_configuration(link, &link->conf);
349 if (ret)
350 goto failed;
352 dev->irq = link->irq.AssignedIRQ;
353 dev->base_addr = link->io.BasePort1;
355 if (!get_prom(link)) {
356 printk(KERN_NOTICE "axnet_cs: this is not an AX88190 card!\n");
357 printk(KERN_NOTICE "axnet_cs: use pcnet_cs instead.\n");
358 goto failed;
361 ei_status.name = "AX88190";
362 ei_status.word16 = 1;
363 ei_status.tx_start_page = AXNET_START_PG;
364 ei_status.rx_start_page = AXNET_START_PG + TX_PAGES;
365 ei_status.stop_page = AXNET_STOP_PG;
366 ei_status.reset_8390 = &axnet_reset_8390;
367 ei_status.get_8390_hdr = &get_8390_hdr;
368 ei_status.block_input = &block_input;
369 ei_status.block_output = &block_output;
371 if (inb(dev->base_addr + AXNET_TEST) != 0)
372 info->flags |= IS_AX88790;
373 else
374 info->flags |= IS_AX88190;
376 if (info->flags & IS_AX88790)
377 outb(0x10, dev->base_addr + AXNET_GPIO); /* select Internal PHY */
379 for (i = 0; i < 32; i++) {
380 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
381 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
382 if (j == j2) continue;
383 if ((j != 0) && (j != 0xffff)) break;
386 /* Maybe PHY is in power down mode. (PPD_SET = 1)
387 Bit 2 of CCSR is active low. */
388 if (i == 32) {
389 conf_reg_t reg = { 0, CS_WRITE, CISREG_CCSR, 0x04 };
390 pcmcia_access_configuration_register(link, &reg);
391 for (i = 0; i < 32; i++) {
392 j = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 1);
393 j2 = mdio_read(dev->base_addr + AXNET_MII_EEP, i, 2);
394 if (j == j2) continue;
395 if ((j != 0) && (j != 0xffff)) break;
399 info->phy_id = (i < 32) ? i : -1;
400 link->dev_node = &info->node;
401 SET_NETDEV_DEV(dev, &link->dev);
403 if (register_netdev(dev) != 0) {
404 printk(KERN_NOTICE "axnet_cs: register_netdev() failed\n");
405 link->dev_node = NULL;
406 goto failed;
409 strcpy(info->node.dev_name, dev->name);
411 printk(KERN_INFO "%s: Asix AX88%d90: io %#3lx, irq %d, "
412 "hw_addr %pM\n",
413 dev->name, ((info->flags & IS_AX88790) ? 7 : 1),
414 dev->base_addr, dev->irq,
415 dev->dev_addr);
416 if (info->phy_id != -1) {
417 dev_dbg(&link->dev, " MII transceiver at index %d, status %x.\n", info->phy_id, j);
418 } else {
419 printk(KERN_NOTICE " No MII transceivers found!\n");
421 return 0;
423 failed:
424 axnet_release(link);
425 return -ENODEV;
426 } /* axnet_config */
428 /*======================================================================
430 After a card is removed, axnet_release() will unregister the net
431 device, and release the PCMCIA configuration. If the device is
432 still open, this will be postponed until it is closed.
434 ======================================================================*/
436 static void axnet_release(struct pcmcia_device *link)
438 pcmcia_disable_device(link);
441 static int axnet_suspend(struct pcmcia_device *link)
443 struct net_device *dev = link->priv;
445 if (link->open)
446 netif_device_detach(dev);
448 return 0;
451 static int axnet_resume(struct pcmcia_device *link)
453 struct net_device *dev = link->priv;
455 if (link->open) {
456 axnet_reset_8390(dev);
457 AX88190_init(dev, 1);
458 netif_device_attach(dev);
461 return 0;
465 /*======================================================================
467 MII interface support
469 ======================================================================*/
471 #define MDIO_SHIFT_CLK 0x01
472 #define MDIO_DATA_WRITE0 0x00
473 #define MDIO_DATA_WRITE1 0x08
474 #define MDIO_DATA_READ 0x04
475 #define MDIO_MASK 0x0f
476 #define MDIO_ENB_IN 0x02
478 static void mdio_sync(unsigned int addr)
480 int bits;
481 for (bits = 0; bits < 32; bits++) {
482 outb_p(MDIO_DATA_WRITE1, addr);
483 outb_p(MDIO_DATA_WRITE1 | MDIO_SHIFT_CLK, addr);
487 static int mdio_read(unsigned int addr, int phy_id, int loc)
489 u_int cmd = (0xf6<<10)|(phy_id<<5)|loc;
490 int i, retval = 0;
492 mdio_sync(addr);
493 for (i = 14; i >= 0; i--) {
494 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
495 outb_p(dat, addr);
496 outb_p(dat | MDIO_SHIFT_CLK, addr);
498 for (i = 19; i > 0; i--) {
499 outb_p(MDIO_ENB_IN, addr);
500 retval = (retval << 1) | ((inb_p(addr) & MDIO_DATA_READ) != 0);
501 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
503 return (retval>>1) & 0xffff;
506 static void mdio_write(unsigned int addr, int phy_id, int loc, int value)
508 u_int cmd = (0x05<<28)|(phy_id<<23)|(loc<<18)|(1<<17)|value;
509 int i;
511 mdio_sync(addr);
512 for (i = 31; i >= 0; i--) {
513 int dat = (cmd&(1<<i)) ? MDIO_DATA_WRITE1 : MDIO_DATA_WRITE0;
514 outb_p(dat, addr);
515 outb_p(dat | MDIO_SHIFT_CLK, addr);
517 for (i = 1; i >= 0; i--) {
518 outb_p(MDIO_ENB_IN, addr);
519 outb_p(MDIO_ENB_IN | MDIO_SHIFT_CLK, addr);
523 /*====================================================================*/
525 static int axnet_open(struct net_device *dev)
527 int ret;
528 axnet_dev_t *info = PRIV(dev);
529 struct pcmcia_device *link = info->p_dev;
530 unsigned int nic_base = dev->base_addr;
532 dev_dbg(&link->dev, "axnet_open('%s')\n", dev->name);
534 if (!pcmcia_dev_present(link))
535 return -ENODEV;
537 outb_p(0xFF, nic_base + EN0_ISR); /* Clear bogus intr. */
538 ret = request_irq(dev->irq, ei_irq_wrapper, IRQF_SHARED, "axnet_cs", dev);
539 if (ret)
540 return ret;
542 link->open++;
544 info->link_status = 0x00;
545 init_timer(&info->watchdog);
546 info->watchdog.function = &ei_watchdog;
547 info->watchdog.data = (u_long)dev;
548 info->watchdog.expires = jiffies + HZ;
549 add_timer(&info->watchdog);
551 return ax_open(dev);
552 } /* axnet_open */
554 /*====================================================================*/
556 static int axnet_close(struct net_device *dev)
558 axnet_dev_t *info = PRIV(dev);
559 struct pcmcia_device *link = info->p_dev;
561 dev_dbg(&link->dev, "axnet_close('%s')\n", dev->name);
563 ax_close(dev);
564 free_irq(dev->irq, dev);
566 link->open--;
567 netif_stop_queue(dev);
568 del_timer_sync(&info->watchdog);
570 return 0;
571 } /* axnet_close */
573 /*======================================================================
575 Hard reset the card. This used to pause for the same period that
576 a 8390 reset command required, but that shouldn't be necessary.
578 ======================================================================*/
580 static void axnet_reset_8390(struct net_device *dev)
582 unsigned int nic_base = dev->base_addr;
583 int i;
585 ei_status.txing = ei_status.dmaing = 0;
587 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, nic_base + E8390_CMD);
589 outb(inb(nic_base + AXNET_RESET), nic_base + AXNET_RESET);
591 for (i = 0; i < 100; i++) {
592 if ((inb_p(nic_base+EN0_ISR) & ENISR_RESET) != 0)
593 break;
594 udelay(100);
596 outb_p(ENISR_RESET, nic_base + EN0_ISR); /* Ack intr. */
598 if (i == 100)
599 printk(KERN_ERR "%s: axnet_reset_8390() did not complete.\n",
600 dev->name);
602 } /* axnet_reset_8390 */
604 /*====================================================================*/
606 static irqreturn_t ei_irq_wrapper(int irq, void *dev_id)
608 struct net_device *dev = dev_id;
609 PRIV(dev)->stale = 0;
610 return ax_interrupt(irq, dev_id);
613 static void ei_watchdog(u_long arg)
615 struct net_device *dev = (struct net_device *)(arg);
616 axnet_dev_t *info = PRIV(dev);
617 unsigned int nic_base = dev->base_addr;
618 unsigned int mii_addr = nic_base + AXNET_MII_EEP;
619 u_short link;
621 if (!netif_device_present(dev)) goto reschedule;
623 /* Check for pending interrupt with expired latency timer: with
624 this, we can limp along even if the interrupt is blocked */
625 if (info->stale++ && (inb_p(nic_base + EN0_ISR) & ENISR_ALL)) {
626 if (!info->fast_poll)
627 printk(KERN_INFO "%s: interrupt(s) dropped!\n", dev->name);
628 ei_irq_wrapper(dev->irq, dev);
629 info->fast_poll = HZ;
631 if (info->fast_poll) {
632 info->fast_poll--;
633 info->watchdog.expires = jiffies + 1;
634 add_timer(&info->watchdog);
635 return;
638 if (info->phy_id < 0)
639 goto reschedule;
640 link = mdio_read(mii_addr, info->phy_id, 1);
641 if (!link || (link == 0xffff)) {
642 printk(KERN_INFO "%s: MII is missing!\n", dev->name);
643 info->phy_id = -1;
644 goto reschedule;
647 link &= 0x0004;
648 if (link != info->link_status) {
649 u_short p = mdio_read(mii_addr, info->phy_id, 5);
650 printk(KERN_INFO "%s: %s link beat\n", dev->name,
651 (link) ? "found" : "lost");
652 if (link) {
653 info->duplex_flag = (p & 0x0140) ? 0x80 : 0x00;
654 if (p)
655 printk(KERN_INFO "%s: autonegotiation complete: "
656 "%sbaseT-%cD selected\n", dev->name,
657 ((p & 0x0180) ? "100" : "10"),
658 ((p & 0x0140) ? 'F' : 'H'));
659 else
660 printk(KERN_INFO "%s: link partner did not autonegotiate\n",
661 dev->name);
662 AX88190_init(dev, 1);
664 info->link_status = link;
667 reschedule:
668 info->watchdog.expires = jiffies + HZ;
669 add_timer(&info->watchdog);
672 static void netdev_get_drvinfo(struct net_device *dev,
673 struct ethtool_drvinfo *info)
675 strcpy(info->driver, "axnet_cs");
678 static const struct ethtool_ops netdev_ethtool_ops = {
679 .get_drvinfo = netdev_get_drvinfo,
682 /*====================================================================*/
684 static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
686 axnet_dev_t *info = PRIV(dev);
687 struct mii_ioctl_data *data = if_mii(rq);
688 unsigned int mii_addr = dev->base_addr + AXNET_MII_EEP;
689 switch (cmd) {
690 case SIOCGMIIPHY:
691 data->phy_id = info->phy_id;
692 case SIOCGMIIREG: /* Read MII PHY register. */
693 data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
694 return 0;
695 case SIOCSMIIREG: /* Write MII PHY register. */
696 mdio_write(mii_addr, data->phy_id, data->reg_num & 0x1f, data->val_in);
697 return 0;
699 return -EOPNOTSUPP;
702 /*====================================================================*/
704 static void get_8390_hdr(struct net_device *dev,
705 struct e8390_pkt_hdr *hdr,
706 int ring_page)
708 unsigned int nic_base = dev->base_addr;
710 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
711 outb_p(ring_page, nic_base + EN0_RSARHI);
712 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
714 insw(nic_base + AXNET_DATAPORT, hdr,
715 sizeof(struct e8390_pkt_hdr)>>1);
716 /* Fix for big endian systems */
717 hdr->count = le16_to_cpu(hdr->count);
721 /*====================================================================*/
723 static void block_input(struct net_device *dev, int count,
724 struct sk_buff *skb, int ring_offset)
726 unsigned int nic_base = dev->base_addr;
727 int xfer_count = count;
728 char *buf = skb->data;
730 if ((ei_debug > 4) && (count != 4))
731 pr_debug("%s: [bi=%d]\n", dev->name, count+4);
732 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
733 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
734 outb_p(E8390_RREAD+E8390_START, nic_base + AXNET_CMD);
736 insw(nic_base + AXNET_DATAPORT,buf,count>>1);
737 if (count & 0x01)
738 buf[count-1] = inb(nic_base + AXNET_DATAPORT), xfer_count++;
742 /*====================================================================*/
744 static void block_output(struct net_device *dev, int count,
745 const u_char *buf, const int start_page)
747 unsigned int nic_base = dev->base_addr;
749 pr_debug("%s: [bo=%d]\n", dev->name, count);
751 /* Round the count up for word writes. Do we need to do this?
752 What effect will an odd byte count have on the 8390?
753 I should check someday. */
754 if (count & 0x01)
755 count++;
757 outb_p(0x00, nic_base + EN0_RSARLO);
758 outb_p(start_page, nic_base + EN0_RSARHI);
759 outb_p(E8390_RWRITE+E8390_START, nic_base + AXNET_CMD);
760 outsw(nic_base + AXNET_DATAPORT, buf, count>>1);
763 static struct pcmcia_device_id axnet_ids[] = {
764 PCMCIA_PFC_DEVICE_MANF_CARD(0, 0x016c, 0x0081),
765 PCMCIA_DEVICE_MANF_CARD(0x018a, 0x0301),
766 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0301),
767 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0303),
768 PCMCIA_DEVICE_MANF_CARD(0x026f, 0x0309),
769 PCMCIA_DEVICE_MANF_CARD(0x0274, 0x1106),
770 PCMCIA_DEVICE_MANF_CARD(0x8a01, 0xc1ab),
771 PCMCIA_DEVICE_MANF_CARD(0x021b, 0x0202),
772 PCMCIA_DEVICE_MANF_CARD(0xffff, 0x1090),
773 PCMCIA_DEVICE_PROD_ID12("AmbiCom,Inc.", "Fast Ethernet PC Card(AMB8110)", 0x49b020a7, 0x119cc9fc),
774 PCMCIA_DEVICE_PROD_ID124("Fast Ethernet", "16-bit PC Card", "AX88190", 0xb4be14e3, 0x9a12eb6a, 0xab9be5ef),
775 PCMCIA_DEVICE_PROD_ID12("ASIX", "AX88190", 0x0959823b, 0xab9be5ef),
776 PCMCIA_DEVICE_PROD_ID12("Billionton", "LNA-100B", 0x552ab682, 0xbc3b87e1),
777 PCMCIA_DEVICE_PROD_ID12("CHEETAH ETHERCARD", "EN2228", 0x00fa7bc8, 0x00e990cc),
778 PCMCIA_DEVICE_PROD_ID12("CNet", "CNF301", 0xbc477dde, 0x78c5f40b),
779 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXD", 0x5261440f, 0x436768c5),
780 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEtherII PCC-TXD", 0x5261440f, 0x730df72e),
781 PCMCIA_DEVICE_PROD_ID12("corega K.K.", "corega FEther PCC-TXM", 0x5261440f, 0x3abbd061),
782 PCMCIA_DEVICE_PROD_ID12("Dynalink", "L100C16", 0x55632fd5, 0x66bc2a90),
783 PCMCIA_DEVICE_PROD_ID12("IO DATA", "ETXPCM", 0x547e66dc, 0x233adac2),
784 PCMCIA_DEVICE_PROD_ID12("Linksys", "EtherFast 10/100 PC Card (PCMPC100 V3)", 0x0733cc81, 0x232019a8),
785 PCMCIA_DEVICE_PROD_ID12("MELCO", "LPC3-TX", 0x481e0094, 0xf91af609),
786 PCMCIA_DEVICE_PROD_ID12("NETGEAR", "FA411", 0x9aa79dc3, 0x40fad875),
787 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "100BASE", 0x281f1c5d, 0x7c2add04),
788 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FastEtherCard", 0x281f1c5d, 0x7ef26116),
789 PCMCIA_DEVICE_PROD_ID12("PCMCIA", "FEP501", 0x281f1c5d, 0x2e272058),
790 PCMCIA_DEVICE_PROD_ID14("Network Everywhere", "AX88190", 0x820a67b6, 0xab9be5ef),
791 PCMCIA_DEVICE_NULL,
793 MODULE_DEVICE_TABLE(pcmcia, axnet_ids);
795 static struct pcmcia_driver axnet_cs_driver = {
796 .owner = THIS_MODULE,
797 .drv = {
798 .name = "axnet_cs",
800 .probe = axnet_probe,
801 .remove = axnet_detach,
802 .id_table = axnet_ids,
803 .suspend = axnet_suspend,
804 .resume = axnet_resume,
807 static int __init init_axnet_cs(void)
809 return pcmcia_register_driver(&axnet_cs_driver);
812 static void __exit exit_axnet_cs(void)
814 pcmcia_unregister_driver(&axnet_cs_driver);
817 module_init(init_axnet_cs);
818 module_exit(exit_axnet_cs);
820 /*====================================================================*/
822 /* 8390.c: A general NS8390 ethernet driver core for linux. */
824 Written 1992-94 by Donald Becker.
826 Copyright 1993 United States Government as represented by the
827 Director, National Security Agency.
829 This software may be used and distributed according to the terms
830 of the GNU General Public License, incorporated herein by reference.
832 The author may be reached as becker@scyld.com, or C/O
833 Scyld Computing Corporation
834 410 Severn Ave., Suite 210
835 Annapolis MD 21403
837 This is the chip-specific code for many 8390-based ethernet adaptors.
838 This is not a complete driver, it must be combined with board-specific
839 code such as ne.c, wd.c, 3c503.c, etc.
841 Seeing how at least eight drivers use this code, (not counting the
842 PCMCIA ones either) it is easy to break some card by what seems like
843 a simple innocent change. Please contact me or Donald if you think
844 you have found something that needs changing. -- PG
846 Changelog:
848 Paul Gortmaker : remove set_bit lock, other cleanups.
849 Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
850 ei_block_input() for eth_io_copy_and_sum().
851 Paul Gortmaker : exchange static int ei_pingpong for a #define,
852 also add better Tx error handling.
853 Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
854 Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
855 Paul Gortmaker : tweak ANK's above multicast changes a bit.
856 Paul Gortmaker : update packet statistics for v2.1.x
857 Alan Cox : support arbitary stupid port mappings on the
858 68K Macintosh. Support >16bit I/O spaces
859 Paul Gortmaker : add kmod support for auto-loading of the 8390
860 module by all drivers that require it.
861 Alan Cox : Spinlocking work, added 'BUG_83C690'
862 Paul Gortmaker : Separate out Tx timeout code from Tx path.
864 Sources:
865 The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
869 static const char version_8390[] = KERN_INFO \
870 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@scyld.com)\n";
872 #include <linux/bitops.h>
873 #include <asm/irq.h>
874 #include <linux/fcntl.h>
875 #include <linux/in.h>
876 #include <linux/interrupt.h>
878 #define BUG_83C690
880 /* These are the operational function interfaces to board-specific
881 routines.
882 void reset_8390(struct net_device *dev)
883 Resets the board associated with DEV, including a hardware reset of
884 the 8390. This is only called when there is a transmit timeout, and
885 it is always followed by 8390_init().
886 void block_output(struct net_device *dev, int count, const unsigned char *buf,
887 int start_page)
888 Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
889 "page" value uses the 8390's 256-byte pages.
890 void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
891 Read the 4 byte, page aligned 8390 header. *If* there is a
892 subsequent read, it will be of the rest of the packet.
893 void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
894 Read COUNT bytes from the packet buffer into the skb data area. Start
895 reading from RING_OFFSET, the address as the 8390 sees it. This will always
896 follow the read of the 8390 header.
898 #define ei_reset_8390 (ei_local->reset_8390)
899 #define ei_block_output (ei_local->block_output)
900 #define ei_block_input (ei_local->block_input)
901 #define ei_get_8390_hdr (ei_local->get_8390_hdr)
903 /* use 0 for production, 1 for verification, >2 for debug */
904 #ifndef ei_debug
905 int ei_debug = 1;
906 #endif
908 /* Index to functions. */
909 static void ei_tx_intr(struct net_device *dev);
910 static void ei_tx_err(struct net_device *dev);
911 static void ei_receive(struct net_device *dev);
912 static void ei_rx_overrun(struct net_device *dev);
914 /* Routines generic to NS8390-based boards. */
915 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
916 int start_page);
917 static void do_set_multicast_list(struct net_device *dev);
920 * SMP and the 8390 setup.
922 * The 8390 isnt exactly designed to be multithreaded on RX/TX. There is
923 * a page register that controls bank and packet buffer access. We guard
924 * this with ei_local->page_lock. Nobody should assume or set the page other
925 * than zero when the lock is not held. Lock holders must restore page 0
926 * before unlocking. Even pure readers must take the lock to protect in
927 * page 0.
929 * To make life difficult the chip can also be very slow. We therefore can't
930 * just use spinlocks. For the longer lockups we disable the irq the device
931 * sits on and hold the lock. We must hold the lock because there is a dual
932 * processor case other than interrupts (get stats/set multicast list in
933 * parallel with each other and transmit).
935 * Note: in theory we can just disable the irq on the card _but_ there is
936 * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
937 * enter lock, take the queued irq. So we waddle instead of flying.
939 * Finally by special arrangement for the purpose of being generally
940 * annoying the transmit function is called bh atomic. That places
941 * restrictions on the user context callers as disable_irq won't save
942 * them.
946 * ax_open - Open/initialize the board.
947 * @dev: network device to initialize
949 * This routine goes all-out, setting everything
950 * up anew at each open, even though many of these registers should only
951 * need to be set once at boot.
953 static int ax_open(struct net_device *dev)
955 unsigned long flags;
956 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
959 * Grab the page lock so we own the register set, then call
960 * the init function.
963 spin_lock_irqsave(&ei_local->page_lock, flags);
964 AX88190_init(dev, 1);
965 /* Set the flag before we drop the lock, That way the IRQ arrives
966 after its set and we get no silly warnings */
967 netif_start_queue(dev);
968 spin_unlock_irqrestore(&ei_local->page_lock, flags);
969 ei_local->irqlock = 0;
970 return 0;
973 #define dev_lock(dev) (((struct ei_device *)netdev_priv(dev))->page_lock)
976 * ax_close - shut down network device
977 * @dev: network device to close
979 * Opposite of ax_open(). Only used when "ifconfig <devname> down" is done.
981 static int ax_close(struct net_device *dev)
983 unsigned long flags;
986 * Hold the page lock during close
989 spin_lock_irqsave(&dev_lock(dev), flags);
990 AX88190_init(dev, 0);
991 spin_unlock_irqrestore(&dev_lock(dev), flags);
992 netif_stop_queue(dev);
993 return 0;
997 * axnet_tx_timeout - handle transmit time out condition
998 * @dev: network device which has apparently fallen asleep
1000 * Called by kernel when device never acknowledges a transmit has
1001 * completed (or failed) - i.e. never posted a Tx related interrupt.
1004 static void axnet_tx_timeout(struct net_device *dev)
1006 long e8390_base = dev->base_addr;
1007 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1008 int txsr, isr, tickssofar = jiffies - dev->trans_start;
1009 unsigned long flags;
1011 dev->stats.tx_errors++;
1013 spin_lock_irqsave(&ei_local->page_lock, flags);
1014 txsr = inb(e8390_base+EN0_TSR);
1015 isr = inb(e8390_base+EN0_ISR);
1016 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1018 printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
1019 dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
1020 (isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
1022 if (!isr && !dev->stats.tx_packets)
1024 /* The 8390 probably hasn't gotten on the cable yet. */
1025 ei_local->interface_num ^= 1; /* Try a different xcvr. */
1028 /* Ugly but a reset can be slow, yet must be protected */
1030 spin_lock_irqsave(&ei_local->page_lock, flags);
1032 /* Try to restart the card. Perhaps the user has fixed something. */
1033 ei_reset_8390(dev);
1034 AX88190_init(dev, 1);
1036 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1037 netif_wake_queue(dev);
1041 * axnet_start_xmit - begin packet transmission
1042 * @skb: packet to be sent
1043 * @dev: network device to which packet is sent
1045 * Sends a packet to an 8390 network device.
1048 static netdev_tx_t axnet_start_xmit(struct sk_buff *skb,
1049 struct net_device *dev)
1051 long e8390_base = dev->base_addr;
1052 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1053 int length, send_length, output_page;
1054 unsigned long flags;
1055 u8 packet[ETH_ZLEN];
1057 netif_stop_queue(dev);
1059 length = skb->len;
1061 /* Mask interrupts from the ethercard.
1062 SMP: We have to grab the lock here otherwise the IRQ handler
1063 on another CPU can flip window and race the IRQ mask set. We end
1064 up trashing the mcast filter not disabling irqs if we don't lock */
1066 spin_lock_irqsave(&ei_local->page_lock, flags);
1067 outb_p(0x00, e8390_base + EN0_IMR);
1070 * Slow phase with lock held.
1073 ei_local->irqlock = 1;
1075 send_length = max(length, ETH_ZLEN);
1078 * We have two Tx slots available for use. Find the first free
1079 * slot, and then perform some sanity checks. With two Tx bufs,
1080 * you get very close to transmitting back-to-back packets. With
1081 * only one Tx buf, the transmitter sits idle while you reload the
1082 * card, leaving a substantial gap between each transmitted packet.
1085 if (ei_local->tx1 == 0)
1087 output_page = ei_local->tx_start_page;
1088 ei_local->tx1 = send_length;
1089 if (ei_debug && ei_local->tx2 > 0)
1090 printk(KERN_DEBUG "%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
1091 dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
1093 else if (ei_local->tx2 == 0)
1095 output_page = ei_local->tx_start_page + TX_PAGES/2;
1096 ei_local->tx2 = send_length;
1097 if (ei_debug && ei_local->tx1 > 0)
1098 printk(KERN_DEBUG "%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
1099 dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
1101 else
1102 { /* We should never get here. */
1103 if (ei_debug)
1104 printk(KERN_DEBUG "%s: No Tx buffers free! tx1=%d tx2=%d last=%d\n",
1105 dev->name, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
1106 ei_local->irqlock = 0;
1107 netif_stop_queue(dev);
1108 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1109 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1110 dev->stats.tx_errors++;
1111 return NETDEV_TX_BUSY;
1115 * Okay, now upload the packet and trigger a send if the transmitter
1116 * isn't already sending. If it is busy, the interrupt handler will
1117 * trigger the send later, upon receiving a Tx done interrupt.
1120 if (length == skb->len)
1121 ei_block_output(dev, length, skb->data, output_page);
1122 else {
1123 memset(packet, 0, ETH_ZLEN);
1124 skb_copy_from_linear_data(skb, packet, skb->len);
1125 ei_block_output(dev, length, packet, output_page);
1128 if (! ei_local->txing)
1130 ei_local->txing = 1;
1131 NS8390_trigger_send(dev, send_length, output_page);
1132 dev->trans_start = jiffies;
1133 if (output_page == ei_local->tx_start_page)
1135 ei_local->tx1 = -1;
1136 ei_local->lasttx = -1;
1138 else
1140 ei_local->tx2 = -1;
1141 ei_local->lasttx = -2;
1144 else ei_local->txqueue++;
1146 if (ei_local->tx1 && ei_local->tx2)
1147 netif_stop_queue(dev);
1148 else
1149 netif_start_queue(dev);
1151 /* Turn 8390 interrupts back on. */
1152 ei_local->irqlock = 0;
1153 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1155 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1157 dev_kfree_skb (skb);
1158 dev->stats.tx_bytes += send_length;
1160 return NETDEV_TX_OK;
1164 * ax_interrupt - handle the interrupts from an 8390
1165 * @irq: interrupt number
1166 * @dev_id: a pointer to the net_device
1168 * Handle the ether interface interrupts. We pull packets from
1169 * the 8390 via the card specific functions and fire them at the networking
1170 * stack. We also handle transmit completions and wake the transmit path if
1171 * necessary. We also update the counters and do other housekeeping as
1172 * needed.
1175 static irqreturn_t ax_interrupt(int irq, void *dev_id)
1177 struct net_device *dev = dev_id;
1178 long e8390_base;
1179 int interrupts, nr_serviced = 0, i;
1180 struct ei_device *ei_local;
1181 int handled = 0;
1183 e8390_base = dev->base_addr;
1184 ei_local = netdev_priv(dev);
1187 * Protect the irq test too.
1190 spin_lock(&ei_local->page_lock);
1192 if (ei_local->irqlock)
1194 #if 1 /* This might just be an interrupt for a PCI device sharing this line */
1195 /* The "irqlock" check is only for testing. */
1196 printk(ei_local->irqlock
1197 ? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
1198 : "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
1199 dev->name, inb_p(e8390_base + EN0_ISR),
1200 inb_p(e8390_base + EN0_IMR));
1201 #endif
1202 spin_unlock(&ei_local->page_lock);
1203 return IRQ_NONE;
1206 if (ei_debug > 3)
1207 printk(KERN_DEBUG "%s: interrupt(isr=%#2.2x).\n", dev->name,
1208 inb_p(e8390_base + EN0_ISR));
1210 outb_p(0x00, e8390_base + EN0_ISR);
1211 ei_local->irqlock = 1;
1213 /* !!Assumption!! -- we stay in page 0. Don't break this. */
1214 while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0 &&
1215 ++nr_serviced < MAX_SERVICE)
1217 if (!netif_running(dev) || (interrupts == 0xff)) {
1218 if (ei_debug > 1)
1219 printk(KERN_WARNING "%s: interrupt from stopped card\n", dev->name);
1220 outb_p(interrupts, e8390_base + EN0_ISR);
1221 interrupts = 0;
1222 break;
1224 handled = 1;
1226 /* AX88190 bug fix. */
1227 outb_p(interrupts, e8390_base + EN0_ISR);
1228 for (i = 0; i < 10; i++) {
1229 if (!(inb(e8390_base + EN0_ISR) & interrupts))
1230 break;
1231 outb_p(0, e8390_base + EN0_ISR);
1232 outb_p(interrupts, e8390_base + EN0_ISR);
1234 if (interrupts & ENISR_OVER)
1235 ei_rx_overrun(dev);
1236 else if (interrupts & (ENISR_RX+ENISR_RX_ERR))
1238 /* Got a good (?) packet. */
1239 ei_receive(dev);
1241 /* Push the next to-transmit packet through. */
1242 if (interrupts & ENISR_TX)
1243 ei_tx_intr(dev);
1244 else if (interrupts & ENISR_TX_ERR)
1245 ei_tx_err(dev);
1247 if (interrupts & ENISR_COUNTERS)
1249 dev->stats.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
1250 dev->stats.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
1251 dev->stats.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
1255 if (interrupts && ei_debug > 3)
1257 handled = 1;
1258 if (nr_serviced >= MAX_SERVICE)
1260 /* 0xFF is valid for a card removal */
1261 if(interrupts!=0xFF)
1262 printk(KERN_WARNING "%s: Too much work at interrupt, status %#2.2x\n",
1263 dev->name, interrupts);
1264 outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
1265 } else {
1266 printk(KERN_WARNING "%s: unknown interrupt %#2x\n", dev->name, interrupts);
1267 outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
1271 /* Turn 8390 interrupts back on. */
1272 ei_local->irqlock = 0;
1273 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1275 spin_unlock(&ei_local->page_lock);
1276 return IRQ_RETVAL(handled);
1280 * ei_tx_err - handle transmitter error
1281 * @dev: network device which threw the exception
1283 * A transmitter error has happened. Most likely excess collisions (which
1284 * is a fairly normal condition). If the error is one where the Tx will
1285 * have been aborted, we try and send another one right away, instead of
1286 * letting the failed packet sit and collect dust in the Tx buffer. This
1287 * is a much better solution as it avoids kernel based Tx timeouts, and
1288 * an unnecessary card reset.
1290 * Called with lock held.
1293 static void ei_tx_err(struct net_device *dev)
1295 long e8390_base = dev->base_addr;
1296 unsigned char txsr = inb_p(e8390_base+EN0_TSR);
1297 unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
1299 #ifdef VERBOSE_ERROR_DUMP
1300 printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
1301 if (txsr & ENTSR_ABT)
1302 printk("excess-collisions ");
1303 if (txsr & ENTSR_ND)
1304 printk("non-deferral ");
1305 if (txsr & ENTSR_CRS)
1306 printk("lost-carrier ");
1307 if (txsr & ENTSR_FU)
1308 printk("FIFO-underrun ");
1309 if (txsr & ENTSR_CDH)
1310 printk("lost-heartbeat ");
1311 printk("\n");
1312 #endif
1314 if (tx_was_aborted)
1315 ei_tx_intr(dev);
1316 else
1318 dev->stats.tx_errors++;
1319 if (txsr & ENTSR_CRS) dev->stats.tx_carrier_errors++;
1320 if (txsr & ENTSR_CDH) dev->stats.tx_heartbeat_errors++;
1321 if (txsr & ENTSR_OWC) dev->stats.tx_window_errors++;
1326 * ei_tx_intr - transmit interrupt handler
1327 * @dev: network device for which tx intr is handled
1329 * We have finished a transmit: check for errors and then trigger the next
1330 * packet to be sent. Called with lock held.
1333 static void ei_tx_intr(struct net_device *dev)
1335 long e8390_base = dev->base_addr;
1336 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1337 int status = inb(e8390_base + EN0_TSR);
1340 * There are two Tx buffers, see which one finished, and trigger
1341 * the send of another one if it exists.
1343 ei_local->txqueue--;
1345 if (ei_local->tx1 < 0)
1347 if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
1348 printk(KERN_ERR "%s: bogus last_tx_buffer %d, tx1=%d.\n",
1349 ei_local->name, ei_local->lasttx, ei_local->tx1);
1350 ei_local->tx1 = 0;
1351 if (ei_local->tx2 > 0)
1353 ei_local->txing = 1;
1354 NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
1355 dev->trans_start = jiffies;
1356 ei_local->tx2 = -1,
1357 ei_local->lasttx = 2;
1359 else ei_local->lasttx = 20, ei_local->txing = 0;
1361 else if (ei_local->tx2 < 0)
1363 if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
1364 printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
1365 ei_local->name, ei_local->lasttx, ei_local->tx2);
1366 ei_local->tx2 = 0;
1367 if (ei_local->tx1 > 0)
1369 ei_local->txing = 1;
1370 NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
1371 dev->trans_start = jiffies;
1372 ei_local->tx1 = -1;
1373 ei_local->lasttx = 1;
1375 else
1376 ei_local->lasttx = 10, ei_local->txing = 0;
1378 // else printk(KERN_WARNING "%s: unexpected TX-done interrupt, lasttx=%d.\n",
1379 // dev->name, ei_local->lasttx);
1381 /* Minimize Tx latency: update the statistics after we restart TXing. */
1382 if (status & ENTSR_COL)
1383 dev->stats.collisions++;
1384 if (status & ENTSR_PTX)
1385 dev->stats.tx_packets++;
1386 else
1388 dev->stats.tx_errors++;
1389 if (status & ENTSR_ABT)
1391 dev->stats.tx_aborted_errors++;
1392 dev->stats.collisions += 16;
1394 if (status & ENTSR_CRS)
1395 dev->stats.tx_carrier_errors++;
1396 if (status & ENTSR_FU)
1397 dev->stats.tx_fifo_errors++;
1398 if (status & ENTSR_CDH)
1399 dev->stats.tx_heartbeat_errors++;
1400 if (status & ENTSR_OWC)
1401 dev->stats.tx_window_errors++;
1403 netif_wake_queue(dev);
1407 * ei_receive - receive some packets
1408 * @dev: network device with which receive will be run
1410 * We have a good packet(s), get it/them out of the buffers.
1411 * Called with lock held.
1414 static void ei_receive(struct net_device *dev)
1416 long e8390_base = dev->base_addr;
1417 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1418 unsigned char rxing_page, this_frame, next_frame;
1419 unsigned short current_offset;
1420 int rx_pkt_count = 0;
1421 struct e8390_pkt_hdr rx_frame;
1423 while (++rx_pkt_count < 10)
1425 int pkt_len, pkt_stat;
1427 /* Get the rx page (incoming packet pointer). */
1428 rxing_page = inb_p(e8390_base + EN1_CURPAG -1);
1430 /* Remove one frame from the ring. Boundary is always a page behind. */
1431 this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
1432 if (this_frame >= ei_local->stop_page)
1433 this_frame = ei_local->rx_start_page;
1435 /* Someday we'll omit the previous, iff we never get this message.
1436 (There is at least one clone claimed to have a problem.)
1438 Keep quiet if it looks like a card removal. One problem here
1439 is that some clones crash in roughly the same way.
1441 if (ei_debug > 0 && this_frame != ei_local->current_page && (this_frame!=0x0 || rxing_page!=0xFF))
1442 printk(KERN_ERR "%s: mismatched read page pointers %2x vs %2x.\n",
1443 dev->name, this_frame, ei_local->current_page);
1445 if (this_frame == rxing_page) /* Read all the frames? */
1446 break; /* Done for now */
1448 current_offset = this_frame << 8;
1449 ei_get_8390_hdr(dev, &rx_frame, this_frame);
1451 pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
1452 pkt_stat = rx_frame.status;
1454 next_frame = this_frame + 1 + ((pkt_len+4)>>8);
1456 if (pkt_len < 60 || pkt_len > 1518)
1458 if (ei_debug)
1459 printk(KERN_DEBUG "%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
1460 dev->name, rx_frame.count, rx_frame.status,
1461 rx_frame.next);
1462 dev->stats.rx_errors++;
1463 dev->stats.rx_length_errors++;
1465 else if ((pkt_stat & 0x0F) == ENRSR_RXOK)
1467 struct sk_buff *skb;
1469 skb = dev_alloc_skb(pkt_len+2);
1470 if (skb == NULL)
1472 if (ei_debug > 1)
1473 printk(KERN_DEBUG "%s: Couldn't allocate a sk_buff of size %d.\n",
1474 dev->name, pkt_len);
1475 dev->stats.rx_dropped++;
1476 break;
1478 else
1480 skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
1481 skb_put(skb, pkt_len); /* Make room */
1482 ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
1483 skb->protocol=eth_type_trans(skb,dev);
1484 netif_rx(skb);
1485 dev->stats.rx_packets++;
1486 dev->stats.rx_bytes += pkt_len;
1487 if (pkt_stat & ENRSR_PHY)
1488 dev->stats.multicast++;
1491 else
1493 if (ei_debug)
1494 printk(KERN_DEBUG "%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
1495 dev->name, rx_frame.status, rx_frame.next,
1496 rx_frame.count);
1497 dev->stats.rx_errors++;
1498 /* NB: The NIC counts CRC, frame and missed errors. */
1499 if (pkt_stat & ENRSR_FO)
1500 dev->stats.rx_fifo_errors++;
1502 next_frame = rx_frame.next;
1504 /* This _should_ never happen: it's here for avoiding bad clones. */
1505 if (next_frame >= ei_local->stop_page) {
1506 printk("%s: next frame inconsistency, %#2x\n", dev->name,
1507 next_frame);
1508 next_frame = ei_local->rx_start_page;
1510 ei_local->current_page = next_frame;
1511 outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
1514 return;
1518 * ei_rx_overrun - handle receiver overrun
1519 * @dev: network device which threw exception
1521 * We have a receiver overrun: we have to kick the 8390 to get it started
1522 * again. Problem is that you have to kick it exactly as NS prescribes in
1523 * the updated datasheets, or "the NIC may act in an unpredictable manner."
1524 * This includes causing "the NIC to defer indefinitely when it is stopped
1525 * on a busy network." Ugh.
1526 * Called with lock held. Don't call this with the interrupts off or your
1527 * computer will hate you - it takes 10ms or so.
1530 static void ei_rx_overrun(struct net_device *dev)
1532 axnet_dev_t *info = PRIV(dev);
1533 long e8390_base = dev->base_addr;
1534 unsigned char was_txing, must_resend = 0;
1537 * Record whether a Tx was in progress and then issue the
1538 * stop command.
1540 was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
1541 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1543 if (ei_debug > 1)
1544 printk(KERN_DEBUG "%s: Receiver overrun.\n", dev->name);
1545 dev->stats.rx_over_errors++;
1548 * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
1549 * Early datasheets said to poll the reset bit, but now they say that
1550 * it "is not a reliable indicator and subsequently should be ignored."
1551 * We wait at least 10ms.
1554 mdelay(10);
1557 * Reset RBCR[01] back to zero as per magic incantation.
1559 outb_p(0x00, e8390_base+EN0_RCNTLO);
1560 outb_p(0x00, e8390_base+EN0_RCNTHI);
1563 * See if any Tx was interrupted or not. According to NS, this
1564 * step is vital, and skipping it will cause no end of havoc.
1567 if (was_txing)
1569 unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
1570 if (!tx_completed)
1571 must_resend = 1;
1575 * Have to enter loopback mode and then restart the NIC before
1576 * you are allowed to slurp packets up off the ring.
1578 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
1579 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
1582 * Clear the Rx ring of all the debris, and ack the interrupt.
1584 ei_receive(dev);
1587 * Leave loopback mode, and resend any packet that got stopped.
1589 outb_p(E8390_TXCONFIG | info->duplex_flag, e8390_base + EN0_TXCR);
1590 if (must_resend)
1591 outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
1595 * Collect the stats. This is called unlocked and from several contexts.
1598 static struct net_device_stats *get_stats(struct net_device *dev)
1600 long ioaddr = dev->base_addr;
1601 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1602 unsigned long flags;
1604 /* If the card is stopped, just return the present stats. */
1605 if (!netif_running(dev))
1606 return &dev->stats;
1608 spin_lock_irqsave(&ei_local->page_lock,flags);
1609 /* Read the counter registers, assuming we are in page 0. */
1610 dev->stats.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
1611 dev->stats.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
1612 dev->stats.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
1613 spin_unlock_irqrestore(&ei_local->page_lock, flags);
1615 return &dev->stats;
1619 * Form the 64 bit 8390 multicast table from the linked list of addresses
1620 * associated with this dev structure.
1623 static inline void make_mc_bits(u8 *bits, struct net_device *dev)
1625 struct dev_mc_list *dmi;
1626 u32 crc;
1628 netdev_for_each_mc_addr(dmi, dev) {
1629 crc = ether_crc(ETH_ALEN, dmi->dmi_addr);
1631 * The 8390 uses the 6 most significant bits of the
1632 * CRC to index the multicast table.
1634 bits[crc>>29] |= (1<<((crc>>26)&7));
1639 * do_set_multicast_list - set/clear multicast filter
1640 * @dev: net device for which multicast filter is adjusted
1642 * Set or clear the multicast filter for this adaptor.
1643 * Must be called with lock held.
1646 static void do_set_multicast_list(struct net_device *dev)
1648 long e8390_base = dev->base_addr;
1649 int i;
1650 struct ei_device *ei_local = (struct ei_device*)netdev_priv(dev);
1652 if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
1653 memset(ei_local->mcfilter, 0, 8);
1654 if (!netdev_mc_empty(dev))
1655 make_mc_bits(ei_local->mcfilter, dev);
1656 } else {
1657 /* set to accept-all */
1658 memset(ei_local->mcfilter, 0xFF, 8);
1661 outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
1662 for(i = 0; i < 8; i++)
1664 outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
1666 outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
1668 if(dev->flags&IFF_PROMISC)
1669 outb_p(E8390_RXCONFIG | 0x58, e8390_base + EN0_RXCR);
1670 else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
1671 outb_p(E8390_RXCONFIG | 0x48, e8390_base + EN0_RXCR);
1672 else
1673 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR);
1675 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1679 * Called without lock held. This is invoked from user context and may
1680 * be parallel to just about everything else. Its also fairly quick and
1681 * not called too often. Must protect against both bh and irq users
1684 static void set_multicast_list(struct net_device *dev)
1686 unsigned long flags;
1688 spin_lock_irqsave(&dev_lock(dev), flags);
1689 do_set_multicast_list(dev);
1690 spin_unlock_irqrestore(&dev_lock(dev), flags);
1693 /* This page of functions should be 8390 generic */
1694 /* Follow National Semi's recommendations for initializing the "NIC". */
1697 * AX88190_init - initialize 8390 hardware
1698 * @dev: network device to initialize
1699 * @startp: boolean. non-zero value to initiate chip processing
1701 * Must be called with lock held.
1704 static void AX88190_init(struct net_device *dev, int startp)
1706 axnet_dev_t *info = PRIV(dev);
1707 long e8390_base = dev->base_addr;
1708 struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
1709 int i;
1710 int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
1712 if(sizeof(struct e8390_pkt_hdr)!=4)
1713 panic("8390.c: header struct mispacked\n");
1714 /* Follow National Semi's recommendations for initing the DP83902. */
1715 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
1716 outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
1717 /* Clear the remote byte count registers. */
1718 outb_p(0x00, e8390_base + EN0_RCNTLO);
1719 outb_p(0x00, e8390_base + EN0_RCNTHI);
1720 /* Set to monitor and loopback mode -- this is vital!. */
1721 outb_p(E8390_RXOFF|0x40, e8390_base + EN0_RXCR); /* 0x60 */
1722 outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
1723 /* Set the transmit page and receive ring. */
1724 outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
1725 ei_local->tx1 = ei_local->tx2 = 0;
1726 outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
1727 outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
1728 ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
1729 outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
1730 /* Clear the pending interrupts and mask. */
1731 outb_p(0xFF, e8390_base + EN0_ISR);
1732 outb_p(0x00, e8390_base + EN0_IMR);
1734 /* Copy the station address into the DS8390 registers. */
1736 outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
1737 for(i = 0; i < 6; i++)
1739 outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
1740 if(inb_p(e8390_base + EN1_PHYS_SHIFT(i))!=dev->dev_addr[i])
1741 printk(KERN_ERR "Hw. address read/write mismap %d\n",i);
1744 outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
1745 outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
1747 netif_start_queue(dev);
1748 ei_local->tx1 = ei_local->tx2 = 0;
1749 ei_local->txing = 0;
1751 if (info->flags & IS_AX88790) /* select Internal PHY */
1752 outb(0x10, e8390_base + AXNET_GPIO);
1754 if (startp)
1756 outb_p(0xff, e8390_base + EN0_ISR);
1757 outb_p(ENISR_ALL, e8390_base + EN0_IMR);
1758 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
1759 outb_p(E8390_TXCONFIG | info->duplex_flag,
1760 e8390_base + EN0_TXCR); /* xmit on. */
1761 /* 3c503 TechMan says rxconfig only after the NIC is started. */
1762 outb_p(E8390_RXCONFIG | 0x40, e8390_base + EN0_RXCR); /* rx on, */
1763 do_set_multicast_list(dev); /* (re)load the mcast table */
1767 /* Trigger a transmit start, assuming the length is valid.
1768 Always called with the page lock held */
1770 static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
1771 int start_page)
1773 long e8390_base = dev->base_addr;
1774 struct ei_device *ei_local __attribute((unused)) = (struct ei_device *) netdev_priv(dev);
1776 if (inb_p(e8390_base) & E8390_TRANS)
1778 printk(KERN_WARNING "%s: trigger_send() called with the transmitter busy.\n",
1779 dev->name);
1780 return;
1782 outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
1783 outb_p(length >> 8, e8390_base + EN0_TCNTHI);
1784 outb_p(start_page, e8390_base + EN0_TPSR);
1785 outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);