1 /* at1700.c: A network device driver for the Allied Telesis AT1700.
3 Written 1993-98 by Donald Becker.
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation
13 410 Severn Ave., Suite 210
16 This is a device driver for the Allied Telesis AT1700, and
17 Fujitsu FMV-181/182/181A/182A/183/184/183A/184A, which are
18 straight-forward Fujitsu MB86965 implementations.
20 Modification for Fujitsu FMV-18X cards is done by Yutaka Tamiya
21 (tamy@flab.fujitsu.co.jp).
24 The Fujitsu MB86965 datasheet.
26 After the initial version of this driver was written Gerry Sawkins of
27 ATI provided their EEPROM configuration code header file.
28 Thanks to NIIBE Yutaka <gniibe@mri.co.jp> for bug fixes.
30 MCA bus (AT1720) support by Rene Schmit <rene@bss.lu>
33 The MB86965 has a design flaw that makes all probes unreliable. Not
34 only is it difficult to detect, it also moves around in I/O space in
35 response to inb()s from other device probes!
38 99/03/03 Allied Telesis RE1000 Plus support by T.Hagawa
39 99/12/30 port to 2.3.35 by K.Takai
42 #include <linux/config.h>
43 #include <linux/errno.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
46 #include <linux/mca-legacy.h>
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/types.h>
50 #include <linux/fcntl.h>
51 #include <linux/interrupt.h>
52 #include <linux/ioport.h>
54 #include <linux/skbuff.h>
55 #include <linux/slab.h>
56 #include <linux/string.h>
57 #include <linux/init.h>
58 #include <linux/crc32.h>
60 #include <asm/system.h>
61 #include <asm/bitops.h>
65 static char version[] __initdata =
66 "at1700.c:v1.15 4/7/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
68 /* Tunable parameters. */
70 /* When to switch from the 64-entry multicast filter to Rx-all-multicast. */
71 #define MC_FILTERBREAK 64
73 /* These unusual address orders are used to verify the CONFIG register. */
75 static int fmv18x_probe_list[] __initdata = {
76 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0
83 #ifndef CONFIG_X86_PC9800
84 static unsigned at1700_probe_list[] __initdata = {
85 0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0
88 #else /* CONFIG_X86_PC9800 */
89 static unsigned at1700_probe_list[] __initdata = {
90 0x1d6, 0x1d8, 0x1da, 0x1d4, 0xd4, 0xd2, 0xd8, 0xd0, 0
93 #endif /* CONFIG_X86_PC9800 */
98 static int at1700_ioaddr_pattern[] __initdata = {
99 0x00, 0x04, 0x01, 0x05, 0x02, 0x06, 0x03, 0x07
102 static int at1700_mca_probe_list[] __initdata = {
103 0x400, 0x1400, 0x2400, 0x3400, 0x4400, 0x5400, 0x6400, 0x7400, 0
106 static int at1700_irq_pattern[] __initdata = {
107 0x00, 0x00, 0x00, 0x30, 0x70, 0xb0, 0x00, 0x00,
108 0x00, 0xf0, 0x34, 0x74, 0xb4, 0x00, 0x00, 0xf4, 0x00
112 /* use 0 for production, 1 for verification, >2 for debug */
116 static unsigned int net_debug = NET_DEBUG;
118 typedef unsigned char uchar;
120 /* Information that need to be kept for each board. */
122 struct net_device_stats stats;
124 unsigned char mc_filter[8];
125 uint jumpered:1; /* Set iff the board has jumper config. */
126 uint tx_started:1; /* Packets are on the Tx queue. */
127 uint tx_queue_ready:1; /* Tx queue is ready to be sent. */
128 uint rx_started:1; /* Packets are Rxing. */
129 uchar tx_queue; /* Number of packet on the Tx queue. */
130 char mca_slot; /* -1 means ISA */
131 ushort tx_queue_len; /* Current length of the Tx queue. */
135 /* Offsets from the base address. */
136 #ifndef CONFIG_X86_PC9800
140 #define TX_INTR 2 /* Bit-mapped interrupt enable registers. */
144 #define CONFIG_0 6 /* Misc. configuration settings. */
146 /* Run-time register bank 2 definitions. */
147 #define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */
149 #define COL16CNTL 11 /* Controll Reg for 16 collisions */
152 /* Configuration registers only on the '865A/B chips. */
153 #define EEPROM_Ctrl 16
154 #define EEPROM_Data 17
155 #define CARDSTATUS 16 /* FMV-18x Card Status */
156 #define CARDSTATUS1 17 /* FMV-18x Card Status */
157 #define IOCONFIG 18 /* Either read the jumper, or move the I/O. */
159 #define SAPROM 20 /* The station address PROM, if no EEPROM. */
161 #define RESET 31 /* Write to reset some parts of the chip. */
162 #define AT1700_IO_EXTENT 32
163 #define PORT_OFFSET(o) (o)
164 #else /* CONFIG_X86_PC9800 */
165 #define STATUS (0x0000)
166 #define TX_STATUS (0x0000)
167 #define RX_STATUS (0x0001)
168 #define TX_INTR (0x0200)/* Bit-mapped interrupt enable registers. */
169 #define RX_INTR (0x0201)
170 #define TX_MODE (0x0400)
171 #define RX_MODE (0x0401)
172 #define CONFIG_0 (0x0600)/* Misc. configuration settings. */
173 #define CONFIG_1 (0x0601)
174 /* Run-time register bank 2 definitions. */
175 #define DATAPORT (0x0800)/* Word-wide DMA or programmed-I/O dataport. */
176 #define TX_START (0x0a00)
177 #define COL16CNTL (0x0a01)/* Controll Reg for 16 collisions */
178 #define MODE13 (0x0c01)
179 #define RX_CTRL (0x0e00)
180 /* Configuration registers only on the '865A/B chips. */
181 #define EEPROM_Ctrl (0x1000)
182 #define EEPROM_Data (0x1200)
183 #define CARDSTATUS 16 /* FMV-18x Card Status */
184 #define CARDSTATUS1 17 /* FMV-18x Card Status */
185 #define IOCONFIG (0x1400)/* Either read the jumper, or move the I/O. */
186 #define IOCONFIG1 (0x1600)
187 #define SAPROM 20 /* The station address PROM, if no EEPROM. */
188 #define MODE24 (0x1800)/* The station address PROM, if no EEPROM. */
189 #define RESET (0x1e01)/* Write to reset some parts of the chip. */
190 #define PORT_OFFSET(o) ({ int _o_ = (o); (_o_ & ~1) * 0x100 + (_o_ & 1); })
191 #endif /* CONFIG_X86_PC9800 */
194 #define TX_TIMEOUT 10
197 /* Index to functions, as function prototypes. */
199 static int at1700_probe1(struct net_device *dev, int ioaddr);
200 static int read_eeprom(long ioaddr, int location);
201 static int net_open(struct net_device *dev);
202 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
203 static irqreturn_t net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
204 static void net_rx(struct net_device *dev);
205 static int net_close(struct net_device *dev);
206 static struct net_device_stats *net_get_stats(struct net_device *dev);
207 static void set_rx_mode(struct net_device *dev);
208 static void net_tx_timeout (struct net_device *dev);
212 struct at1720_mca_adapters_struct {
216 /* rEnE : maybe there are others I don't know off... */
218 static struct at1720_mca_adapters_struct at1720_mca_adapters[] __initdata = {
219 { "Allied Telesys AT1720AT", 0x6410 },
220 { "Allied Telesys AT1720BT", 0x6413 },
221 { "Allied Telesys AT1720T", 0x6416 },
226 /* Check for a network adaptor of this type, and return '0' iff one exists.
227 If dev->base_addr == 0, probe all likely locations.
228 If dev->base_addr == 1, always return failure.
229 If dev->base_addr == 2, allocate space for the device and return success
230 (detachable devices only).
233 #ifndef CONFIG_X86_PC9800
234 static int io = 0x260;
236 static int io = 0xd0;
241 static void cleanup_card(struct net_device *dev)
244 struct net_local *lp = netdev_priv(dev);
246 mca_mark_as_unused(lp->mca_slot);
248 free_irq(dev->irq, NULL);
249 #ifndef CONFIG_X86_PC9800
250 release_region(dev->base_addr, AT1700_IO_EXTENT);
254 for (i = 0; i < 0x2000; i += 0x200)
255 release_region(dev->base_addr + i, 2);
260 struct net_device * __init at1700_probe(int unit)
262 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
267 return ERR_PTR(-ENODEV);
270 sprintf(dev->name, "eth%d", unit);
271 netdev_boot_setup_check(dev);
279 SET_MODULE_OWNER(dev);
281 if (io > 0x1ff) { /* Check a single specified location. */
282 err = at1700_probe1(dev, io);
283 } else if (io != 0) { /* Don't probe at all. */
286 for (port = at1700_probe_list; *port; port++) {
287 if (at1700_probe1(dev, *port) == 0)
296 err = register_netdev(dev);
307 /* The Fujitsu datasheet suggests that the NIC be probed for by checking its
308 "signature", the default bit pattern after a reset. This *doesn't* work --
309 there is no way to reset the bus interface without a complete power-cycle!
311 It turns out that ATI came to the same conclusion I did: the only thing
312 that can be done is checking a few bits and then diving right into an
315 static int __init at1700_probe1(struct net_device *dev, int ioaddr)
317 char fmv_irqmap[4] = {3, 7, 10, 15};
318 char fmv_irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15};
319 char at1700_irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15};
320 unsigned int i, irq, is_fmv18x = 0, is_at1700 = 0;
321 int slot, ret = -ENODEV;
322 struct net_local *lp = netdev_priv(dev);
324 #ifndef CONFIG_X86_PC9800
325 if (!request_region(ioaddr, AT1700_IO_EXTENT, dev->name))
328 for (i = 0; i < 0x2000; i += 0x0200) {
329 if (!request_region(ioaddr + i, 2, dev->name)) {
332 release_region(ioaddr + i, 2);
339 /* Resetting the chip doesn't reset the ISA interface, so don't bother.
340 That means we have to be careful with the register values we probe
344 printk("at1700 probe at %#x, eeprom is %4.4x %4.4x %4.4x ctrl %4.4x.\n",
345 ioaddr, read_eeprom(ioaddr, 4), read_eeprom(ioaddr, 5),
346 read_eeprom(ioaddr, 6), inw(ioaddr + EEPROM_Ctrl));
350 /* rEnE (rene@bss.lu): got this from 3c509 driver source , adapted for AT1720 */
352 /* Based on Erik Nygren's (nygren@mit.edu) 3c529 patch, heavily
353 modified by Chris Beauregard (cpbeaure@csclub.uwaterloo.ca)
354 to support standard MCA probing. */
356 /* redone for multi-card detection by ZP Gu (zpg@castle.net) */
357 /* now works as a module */
364 for (j = 0; at1720_mca_adapters[j].name != NULL; j ++) {
366 while (slot != MCA_NOTFOUND) {
368 slot = mca_find_unused_adapter( at1720_mca_adapters[j].id, slot );
369 if (slot == MCA_NOTFOUND) break;
371 /* if we get this far, an adapter has been detected and is
374 pos3 = mca_read_stored_pos( slot, 3 );
375 pos4 = mca_read_stored_pos( slot, 4 );
377 for (l_i = 0; l_i < 0x09; l_i++)
378 if (( pos3 & 0x07) == at1700_ioaddr_pattern[l_i])
380 ioaddr = at1700_mca_probe_list[l_i];
382 for (irq = 0; irq < 0x10; irq++)
383 if (((((pos4>>4) & 0x0f) | (pos3 & 0xf0)) & 0xff) == at1700_irq_pattern[irq])
386 /* probing for a card at a particular IO/IRQ */
387 if ((dev->irq && dev->irq != irq) ||
388 (dev->base_addr && dev->base_addr != ioaddr)) {
389 slot++; /* probing next slot */
396 mca_set_adapter_name( slot, at1720_mca_adapters[j].name );
397 mca_mark_as_used(slot);
402 /* if we get here, we didn't find an MCA adapter - try ISA */
406 /* We must check for the EEPROM-config boards first, else accessing
407 IOCONFIG0 will move the board! */
408 if (at1700_probe_list[inb(ioaddr + IOCONFIG1) & 0x07] == ioaddr
409 && read_eeprom(ioaddr, 4) == 0x0000
410 && (read_eeprom(ioaddr, 5) & 0xff00) == 0xF400)
412 else if (inb(ioaddr + SAPROM ) == 0x00
413 && inb(ioaddr + SAPROM + 1) == 0x00
414 && inb(ioaddr + SAPROM + 2) == 0x0e)
424 /* Reset the internal state machines. */
425 outb(0, ioaddr + RESET);
428 #ifndef CONFIG_X86_PC9800
429 irq = at1700_irqmap[(read_eeprom(ioaddr, 12)&0x04)
430 | (read_eeprom(ioaddr, 0)>>14)];
433 char re1000plus_irqmap[4] = {3, 5, 6, 12};
434 irq = re1000plus_irqmap[inb(ioaddr + IOCONFIG1) >> 6];
438 /* Check PnP mode for FMV-183/184/183A/184A. */
439 /* This PnP routine is very poor. IO and IRQ should be known. */
440 if (inb(ioaddr + CARDSTATUS1) & 0x20) {
442 for (i = 0; i < 8; i++) {
443 if (irq == fmv_irqmap_pnp[i])
450 if (fmv18x_probe_list[inb(ioaddr + IOCONFIG) & 0x07] != ioaddr)
452 irq = fmv_irqmap[(inb(ioaddr + IOCONFIG)>>6) & 0x03];
456 printk("%s: %s found at %#3x, IRQ %d, address ", dev->name,
457 is_at1700 ? "AT1700" : "FMV-18X", ioaddr, irq);
459 dev->base_addr = ioaddr;
463 for(i = 0; i < 3; i++) {
464 unsigned short eeprom_val = read_eeprom(ioaddr, 4+i);
465 printk("%04x", eeprom_val);
466 ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_val);
469 for(i = 0; i < 6; i++) {
470 unsigned char val = inb(ioaddr + SAPROM + i);
472 dev->dev_addr[i] = val;
476 /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
477 rather than 150 ohm shielded twisted pair compensation.
478 0x0000 == auto-sense the interface
479 0x0800 == use TP interface
480 0x1800 == use coax interface
483 const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"};
485 ushort setup_value = read_eeprom(ioaddr, 12);
486 dev->if_port = setup_value >> 8;
488 ushort setup_value = inb(ioaddr + CARDSTATUS);
489 switch (setup_value & 0x07) {
490 case 0x01: /* 10base5 */
491 case 0x02: /* 10base2 */
492 dev->if_port = 0x18; break;
493 case 0x04: /* 10baseT */
494 dev->if_port = 0x08; break;
495 default: /* auto-sense */
496 dev->if_port = 0x00; break;
499 printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
502 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
503 bus access, two 4K Tx queues, and disabled Tx and Rx. */
504 outb(0xda, ioaddr + CONFIG_0);
506 /* Set the station address in bank zero. */
507 outb(0x00, ioaddr + CONFIG_1);
508 for (i = 0; i < 6; i++)
509 outb(dev->dev_addr[i], ioaddr + PORT_OFFSET(8 + i));
511 /* Switch to bank 1 and set the multicast table to accept none. */
512 outb(0x04, ioaddr + CONFIG_1);
513 for (i = 0; i < 8; i++)
514 outb(0x00, ioaddr + PORT_OFFSET(8 + i));
517 /* Switch to bank 2 */
518 /* Lock our I/O address, and set manual processing mode for 16 collisions. */
519 outb(0x08, ioaddr + CONFIG_1);
520 #ifndef CONFIG_X86_PC9800
521 outb(dev->if_port, ioaddr + MODE13);
523 outb(0, ioaddr + MODE13);
525 outb(0x00, ioaddr + COL16CNTL);
530 memset(lp, 0, sizeof(struct net_local));
532 dev->open = net_open;
533 dev->stop = net_close;
534 dev->hard_start_xmit = net_send_packet;
535 dev->get_stats = net_get_stats;
536 dev->set_multicast_list = &set_rx_mode;
537 dev->tx_timeout = net_tx_timeout;
538 dev->watchdog_timeo = TX_TIMEOUT;
540 spin_lock_init(&lp->lock);
542 lp->jumpered = is_fmv18x;
544 /* Snarf the interrupt vector now. */
545 ret = request_irq(irq, &net_interrupt, 0, dev->name, dev);
547 printk (" AT1700 at %#3x is unusable due to a conflict on"
548 "IRQ %d.\n", ioaddr, irq);
555 #ifndef CONFIG_X86_PC9800
556 release_region(ioaddr, AT1700_IO_EXTENT);
558 for (i = 0; i < 0x2000; i += 0x0200)
559 release_region(ioaddr + i, 2);
565 /* EEPROM_Ctrl bits. */
566 #define EE_SHIFT_CLK 0x40 /* EEPROM shift clock, in reg. 16. */
567 #define EE_CS 0x20 /* EEPROM chip select, in reg. 16. */
568 #define EE_DATA_WRITE 0x80 /* EEPROM chip data in, in reg. 17. */
569 #define EE_DATA_READ 0x80 /* EEPROM chip data out, in reg. 17. */
571 /* Delay between EEPROM clock transitions. */
572 #ifndef CONFIG_X86_PC9800
573 #define eeprom_delay() do { } while (0)
575 #define eeprom_delay() __asm__ ("out%B0 %%al,%0" :: "N"(0x5f))
578 /* The EEPROM commands include the alway-set leading bit. */
579 #define EE_WRITE_CMD (5 << 6)
580 #define EE_READ_CMD (6 << 6)
581 #define EE_ERASE_CMD (7 << 6)
583 static int __init read_eeprom(long ioaddr, int location)
586 unsigned short retval = 0;
587 long ee_addr = ioaddr + EEPROM_Ctrl;
588 long ee_daddr = ioaddr + EEPROM_Data;
589 int read_cmd = location | EE_READ_CMD;
591 /* Shift the read command bits out. */
592 for (i = 9; i >= 0; i--) {
593 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
594 outb(EE_CS, ee_addr);
595 outb(dataval, ee_daddr);
597 outb(EE_CS | EE_SHIFT_CLK, ee_addr); /* EEPROM clock tick. */
600 outb(EE_DATA_WRITE, ee_daddr);
601 for (i = 16; i > 0; i--) {
602 outb(EE_CS, ee_addr);
604 outb(EE_CS | EE_SHIFT_CLK, ee_addr);
606 retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0);
609 /* Terminate the EEPROM access. */
610 outb(EE_CS, ee_addr);
612 outb(EE_SHIFT_CLK, ee_addr);
619 static int net_open(struct net_device *dev)
621 struct net_local *lp = netdev_priv(dev);
622 int ioaddr = dev->base_addr;
624 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
625 bus access, and two 4K Tx queues. */
626 outb(0x5a, ioaddr + CONFIG_0);
628 /* Powerup, switch to register bank 2, and enable the Rx and Tx. */
629 outb(0xe8, ioaddr + CONFIG_1);
632 lp->tx_queue_ready = 1;
635 lp->tx_queue_len = 0;
637 /* Turn on hardware Tx and Rx interrupts. */
638 outb(0x82, ioaddr + TX_INTR);
639 outb(0x81, ioaddr + RX_INTR);
641 /* Enable the IRQ on boards of fmv18x it is feasible. */
643 outb(0x80, ioaddr + IOCONFIG1);
646 netif_start_queue(dev);
650 static void net_tx_timeout (struct net_device *dev)
652 struct net_local *lp = netdev_priv(dev);
653 int ioaddr = dev->base_addr;
655 printk ("%s: transmit timed out with status %04x, %s?\n", dev->name,
656 inw (ioaddr + STATUS), inb (ioaddr + TX_STATUS) & 0x80
657 ? "IRQ conflict" : "network cable problem");
658 printk ("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
659 dev->name, inw(ioaddr + TX_STATUS), inw(ioaddr + TX_INTR), inw(ioaddr + TX_MODE),
660 inw(ioaddr + CONFIG_0), inw(ioaddr + DATAPORT), inw(ioaddr + TX_START),
661 inw(ioaddr + MODE13 - 1), inw(ioaddr + RX_CTRL));
662 lp->stats.tx_errors++;
663 /* ToDo: We should try to restart the adaptor... */
664 outw(0xffff, ioaddr + MODE24);
665 outw (0xffff, ioaddr + TX_STATUS);
666 outb (0x5a, ioaddr + CONFIG_0);
667 outb (0xe8, ioaddr + CONFIG_1);
668 outw (0x8182, ioaddr + TX_INTR);
669 outb (0x00, ioaddr + TX_START);
670 outb (0x03, ioaddr + COL16CNTL);
672 dev->trans_start = jiffies;
675 lp->tx_queue_ready = 1;
678 lp->tx_queue_len = 0;
680 netif_wake_queue(dev);
684 static int net_send_packet (struct sk_buff *skb, struct net_device *dev)
686 struct net_local *lp = netdev_priv(dev);
687 int ioaddr = dev->base_addr;
688 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
689 short len = skb->len;
690 unsigned char *buf = skb->data;
691 static u8 pad[ETH_ZLEN];
693 netif_stop_queue (dev);
695 /* We may not start transmitting unless we finish transferring
696 a packet into the Tx queue. During executing the following
697 codes we possibly catch a Tx interrupt. Thus we flag off
698 tx_queue_ready, so that we prevent the interrupt routine
699 (net_interrupt) to start transmitting. */
700 lp->tx_queue_ready = 0;
702 outw (length, ioaddr + DATAPORT);
704 outsw (ioaddr + DATAPORT, buf, len >> 1);
705 /* Check for dribble byte */
707 outw(skb->data[skb->len-1], ioaddr + DATAPORT);
710 /* Check for packet padding */
711 if (length != skb->len)
712 outsw(ioaddr + DATAPORT, pad, (length - len + 1) >> 1);
715 lp->tx_queue_len += length + 2;
717 lp->tx_queue_ready = 1;
719 if (lp->tx_started == 0) {
720 /* If the Tx is idle, always trigger a transmit. */
721 outb (0x80 | lp->tx_queue, ioaddr + TX_START);
723 lp->tx_queue_len = 0;
724 dev->trans_start = jiffies;
726 netif_start_queue (dev);
727 } else if (lp->tx_queue_len < 4096 - 1502)
728 /* Yes, there is room for one more packet. */
729 netif_start_queue (dev);
735 /* The typical workload of the driver:
736 Handle the network interface interrupts. */
738 net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
740 struct net_device *dev = dev_id;
741 struct net_local *lp;
746 printk ("at1700_interrupt(): irq %d for unknown device.\n", irq);
750 ioaddr = dev->base_addr;
751 lp = netdev_priv(dev);
753 spin_lock (&lp->lock);
755 status = inw(ioaddr + TX_STATUS);
756 outw(status, ioaddr + TX_STATUS);
759 printk("%s: Interrupt with status %04x.\n", dev->name, status);
760 if (lp->rx_started == 0 &&
761 (status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) {
763 We cannot execute net_rx more than once at the same time for
764 the same device. During executing net_rx, we possibly catch a
765 Tx interrupt. Thus we flag on rx_started, so that we prevent
766 the interrupt routine (net_interrupt) to dive into net_rx
770 outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */
772 outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */
775 if (status & 0x00ff) {
778 /* More than 16 collisions occurred */
780 printk("%s: 16 Collision occur during Txing.\n", dev->name);
781 /* Cancel sending a packet. */
782 outb(0x03, ioaddr + COL16CNTL);
783 lp->stats.collisions++;
786 lp->stats.tx_packets++;
787 /* The Tx queue has any packets and is not being
788 transferred a packet from the host, start
790 if (lp->tx_queue && lp->tx_queue_ready) {
791 outb(0x80 | lp->tx_queue, ioaddr + TX_START);
793 lp->tx_queue_len = 0;
794 dev->trans_start = jiffies;
795 netif_wake_queue (dev);
798 netif_wake_queue (dev);
803 spin_unlock (&lp->lock);
804 return IRQ_RETVAL(handled);
807 /* We have a good packet(s), get it/them out of the buffers. */
809 net_rx(struct net_device *dev)
811 struct net_local *lp = netdev_priv(dev);
812 int ioaddr = dev->base_addr;
815 while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
816 ushort status = inw(ioaddr + DATAPORT);
817 ushort pkt_len = inw(ioaddr + DATAPORT);
820 printk("%s: Rxing packet mode %02x status %04x.\n",
821 dev->name, inb(ioaddr + RX_MODE), status);
822 #ifndef final_version
824 outb(0x05, ioaddr + RX_CTRL);
829 if ((status & 0xF0) != 0x20) { /* There was an error. */
830 lp->stats.rx_errors++;
831 if (status & 0x08) lp->stats.rx_length_errors++;
832 if (status & 0x04) lp->stats.rx_frame_errors++;
833 if (status & 0x02) lp->stats.rx_crc_errors++;
834 if (status & 0x01) lp->stats.rx_over_errors++;
836 /* Malloc up new buffer. */
839 if (pkt_len > 1550) {
840 printk("%s: The AT1700 claimed a very large packet, size %d.\n",
842 /* Prime the FIFO and then flush the packet. */
843 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
844 outb(0x05, ioaddr + RX_CTRL);
845 lp->stats.rx_errors++;
848 skb = dev_alloc_skb(pkt_len+3);
850 printk("%s: Memory squeeze, dropping packet (len %d).\n",
852 /* Prime the FIFO and then flush the packet. */
853 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
854 outb(0x05, ioaddr + RX_CTRL);
855 lp->stats.rx_dropped++;
861 insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
862 skb->protocol=eth_type_trans(skb, dev);
864 dev->last_rx = jiffies;
865 lp->stats.rx_packets++;
866 lp->stats.rx_bytes += pkt_len;
868 if (--boguscount <= 0)
872 /* If any worth-while packets have been received, dev_rint()
873 has done a mark_bh(NET_BH) for us and will work on them
874 when we get to the bottom-half routine. */
877 for (i = 0; i < 20; i++) {
878 if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
880 inw(ioaddr + DATAPORT); /* dummy status read */
881 outb(0x05, ioaddr + RX_CTRL);
885 printk("%s: Exint Rx packet with mode %02x after %d ticks.\n",
886 dev->name, inb(ioaddr + RX_MODE), i);
891 /* The inverse routine to net_open(). */
892 static int net_close(struct net_device *dev)
894 struct net_local *lp = netdev_priv(dev);
895 int ioaddr = dev->base_addr;
897 netif_stop_queue(dev);
899 /* Set configuration register 0 to disable Tx and Rx. */
900 outb(0xda, ioaddr + CONFIG_0);
902 /* No statistic counters on the chip to update. */
904 /* Disable the IRQ on boards of fmv18x where it is feasible. */
906 outb(0x00, ioaddr + IOCONFIG1);
907 free_irq(dev->irq, dev);
910 /* Power-down the chip. Green, green, green! */
911 outb(0x00, ioaddr + CONFIG_1);
915 /* Get the current statistics.
916 This may be called with the card open or closed.
917 There are no on-chip counters, so this function is trivial.
919 static struct net_device_stats *
920 net_get_stats(struct net_device *dev)
922 struct net_local *lp = netdev_priv(dev);
927 Set the multicast/promiscuous mode for this adaptor.
931 set_rx_mode(struct net_device *dev)
933 int ioaddr = dev->base_addr;
934 struct net_local *lp = netdev_priv(dev);
935 unsigned char mc_filter[8]; /* Multicast hash filter */
939 if (dev->flags & IFF_PROMISC) {
940 /* Unconditionally log net taps. */
941 printk("%s: Promiscuous mode enabled.\n", dev->name);
942 memset(mc_filter, 0xff, sizeof(mc_filter));
943 outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */
944 } else if (dev->mc_count > MC_FILTERBREAK
945 || (dev->flags & IFF_ALLMULTI)) {
946 /* Too many to filter perfectly -- accept all multicasts. */
947 memset(mc_filter, 0xff, sizeof(mc_filter));
948 outb(2, ioaddr + RX_MODE); /* Use normal mode. */
949 } else if (dev->mc_count == 0) {
950 memset(mc_filter, 0x00, sizeof(mc_filter));
951 outb(1, ioaddr + RX_MODE); /* Ignore almost all multicasts. */
953 struct dev_mc_list *mclist;
956 memset(mc_filter, 0, sizeof(mc_filter));
957 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
958 i++, mclist = mclist->next) {
960 ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 26;
961 mc_filter[bit >> 3] |= (1 << bit);
963 outb(0x02, ioaddr + RX_MODE); /* Use normal mode. */
966 spin_lock_irqsave (&lp->lock, flags);
967 if (memcmp(mc_filter, lp->mc_filter, sizeof(mc_filter))) {
968 int saved_bank = inw(ioaddr + CONFIG_0);
969 /* Switch to bank 1 and set the multicast table. */
970 outw((saved_bank & ~0x0C00) | 0x0480, ioaddr + CONFIG_0);
971 for (i = 0; i < 8; i++)
972 outb(mc_filter[i], ioaddr + PORT_OFFSET(8 + i));
973 memcpy(lp->mc_filter, mc_filter, sizeof(mc_filter));
974 outw(saved_bank, ioaddr + CONFIG_0);
976 spin_unlock_irqrestore (&lp->lock, flags);
981 static struct net_device *dev_at1700;
983 MODULE_PARM(io, "i");
984 MODULE_PARM(irq, "i");
985 MODULE_PARM(net_debug, "i");
986 MODULE_PARM_DESC(io, "AT1700/FMV18X I/O base address");
987 MODULE_PARM_DESC(irq, "AT1700/FMV18X IRQ number");
988 MODULE_PARM_DESC(net_debug, "AT1700/FMV18X debug level (0-6)");
990 int init_module(void)
993 printk("at1700: You should not use auto-probing with insmod!\n");
994 dev_at1700 = at1700_probe(-1);
995 if (IS_ERR(dev_at1700))
996 return PTR_ERR(dev_at1700);
1001 cleanup_module(void)
1003 unregister_netdev(dev_at1700);
1004 cleanup_card(dev_at1700);
1005 free_netdev(dev_at1700);
1008 MODULE_LICENSE("GPL");
1013 * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"
1014 * alt-compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"