pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / net / at1700.c
blobb032c1bf492fc06e03b067a0fe23ae2c24c36bfd
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
14 Annapolis MD 21403
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).
23 Sources:
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>
32 Bugs:
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 #include <linux/errno.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/mca-legacy.h>
42 #include <linux/module.h>
43 #include <linux/kernel.h>
44 #include <linux/types.h>
45 #include <linux/fcntl.h>
46 #include <linux/interrupt.h>
47 #include <linux/ioport.h>
48 #include <linux/in.h>
49 #include <linux/skbuff.h>
50 #include <linux/slab.h>
51 #include <linux/string.h>
52 #include <linux/init.h>
53 #include <linux/crc32.h>
54 #include <linux/bitops.h>
56 #include <asm/system.h>
57 #include <asm/io.h>
58 #include <asm/dma.h>
60 static char version[] __initdata =
61 "at1700.c:v1.16 9/11/06 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
63 #define DRV_NAME "at1700"
65 /* Tunable parameters. */
67 /* When to switch from the 64-entry multicast filter to Rx-all-multicast. */
68 #define MC_FILTERBREAK 64
70 /* These unusual address orders are used to verify the CONFIG register. */
72 static int fmv18x_probe_list[] __initdata = {
73 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0
77 * ISA
80 static unsigned at1700_probe_list[] __initdata = {
81 0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0
85 * MCA
87 #ifdef CONFIG_MCA_LEGACY
88 static int at1700_ioaddr_pattern[] __initdata = {
89 0x00, 0x04, 0x01, 0x05, 0x02, 0x06, 0x03, 0x07
92 static int at1700_mca_probe_list[] __initdata = {
93 0x400, 0x1400, 0x2400, 0x3400, 0x4400, 0x5400, 0x6400, 0x7400, 0
96 static int at1700_irq_pattern[] __initdata = {
97 0x00, 0x00, 0x00, 0x30, 0x70, 0xb0, 0x00, 0x00,
98 0x00, 0xf0, 0x34, 0x74, 0xb4, 0x00, 0x00, 0xf4, 0x00
100 #endif
102 /* use 0 for production, 1 for verification, >2 for debug */
103 #ifndef NET_DEBUG
104 #define NET_DEBUG 1
105 #endif
106 static unsigned int net_debug = NET_DEBUG;
108 typedef unsigned char uchar;
110 /* Information that need to be kept for each board. */
111 struct net_local {
112 spinlock_t lock;
113 unsigned char mc_filter[8];
114 uint jumpered:1; /* Set iff the board has jumper config. */
115 uint tx_started:1; /* Packets are on the Tx queue. */
116 uint tx_queue_ready:1; /* Tx queue is ready to be sent. */
117 uint rx_started:1; /* Packets are Rxing. */
118 uchar tx_queue; /* Number of packet on the Tx queue. */
119 char mca_slot; /* -1 means ISA */
120 ushort tx_queue_len; /* Current length of the Tx queue. */
124 /* Offsets from the base address. */
125 #define STATUS 0
126 #define TX_STATUS 0
127 #define RX_STATUS 1
128 #define TX_INTR 2 /* Bit-mapped interrupt enable registers. */
129 #define RX_INTR 3
130 #define TX_MODE 4
131 #define RX_MODE 5
132 #define CONFIG_0 6 /* Misc. configuration settings. */
133 #define CONFIG_1 7
134 /* Run-time register bank 2 definitions. */
135 #define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */
136 #define TX_START 10
137 #define COL16CNTL 11 /* Controll Reg for 16 collisions */
138 #define MODE13 13
139 #define RX_CTRL 14
140 /* Configuration registers only on the '865A/B chips. */
141 #define EEPROM_Ctrl 16
142 #define EEPROM_Data 17
143 #define CARDSTATUS 16 /* FMV-18x Card Status */
144 #define CARDSTATUS1 17 /* FMV-18x Card Status */
145 #define IOCONFIG 18 /* Either read the jumper, or move the I/O. */
146 #define IOCONFIG1 19
147 #define SAPROM 20 /* The station address PROM, if no EEPROM. */
148 #define MODE24 24
149 #define RESET 31 /* Write to reset some parts of the chip. */
150 #define AT1700_IO_EXTENT 32
151 #define PORT_OFFSET(o) (o)
154 #define TX_TIMEOUT 10
157 /* Index to functions, as function prototypes. */
159 static int at1700_probe1(struct net_device *dev, int ioaddr);
160 static int read_eeprom(long ioaddr, int location);
161 static int net_open(struct net_device *dev);
162 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
163 static irqreturn_t net_interrupt(int irq, void *dev_id);
164 static void net_rx(struct net_device *dev);
165 static int net_close(struct net_device *dev);
166 static void set_rx_mode(struct net_device *dev);
167 static void net_tx_timeout (struct net_device *dev);
170 #ifdef CONFIG_MCA_LEGACY
171 struct at1720_mca_adapters_struct {
172 char* name;
173 int id;
175 /* rEnE : maybe there are others I don't know off... */
177 static struct at1720_mca_adapters_struct at1720_mca_adapters[] __initdata = {
178 { "Allied Telesys AT1720AT", 0x6410 },
179 { "Allied Telesys AT1720BT", 0x6413 },
180 { "Allied Telesys AT1720T", 0x6416 },
181 { NULL, 0 },
183 #endif
185 /* Check for a network adaptor of this type, and return '0' iff one exists.
186 If dev->base_addr == 0, probe all likely locations.
187 If dev->base_addr == 1, always return failure.
188 If dev->base_addr == 2, allocate space for the device and return success
189 (detachable devices only).
192 static int io = 0x260;
194 static int irq;
196 static void cleanup_card(struct net_device *dev)
198 #ifdef CONFIG_MCA_LEGACY
199 struct net_local *lp = netdev_priv(dev);
200 if (lp->mca_slot >= 0)
201 mca_mark_as_unused(lp->mca_slot);
202 #endif
203 free_irq(dev->irq, NULL);
204 release_region(dev->base_addr, AT1700_IO_EXTENT);
207 struct net_device * __init at1700_probe(int unit)
209 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
210 unsigned *port;
211 int err = 0;
213 if (!dev)
214 return ERR_PTR(-ENODEV);
216 if (unit >= 0) {
217 sprintf(dev->name, "eth%d", unit);
218 netdev_boot_setup_check(dev);
219 io = dev->base_addr;
220 irq = dev->irq;
221 } else {
222 dev->base_addr = io;
223 dev->irq = irq;
226 if (io > 0x1ff) { /* Check a single specified location. */
227 err = at1700_probe1(dev, io);
228 } else if (io != 0) { /* Don't probe at all. */
229 err = -ENXIO;
230 } else {
231 for (port = at1700_probe_list; *port; port++) {
232 if (at1700_probe1(dev, *port) == 0)
233 break;
234 dev->irq = irq;
236 if (!*port)
237 err = -ENODEV;
239 if (err)
240 goto out;
241 err = register_netdev(dev);
242 if (err)
243 goto out1;
244 return dev;
245 out1:
246 cleanup_card(dev);
247 out:
248 free_netdev(dev);
249 return ERR_PTR(err);
252 /* The Fujitsu datasheet suggests that the NIC be probed for by checking its
253 "signature", the default bit pattern after a reset. This *doesn't* work --
254 there is no way to reset the bus interface without a complete power-cycle!
256 It turns out that ATI came to the same conclusion I did: the only thing
257 that can be done is checking a few bits and then diving right into an
258 EEPROM read. */
260 static int __init at1700_probe1(struct net_device *dev, int ioaddr)
262 char fmv_irqmap[4] = {3, 7, 10, 15};
263 char fmv_irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15};
264 char at1700_irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15};
265 unsigned int i, irq, is_fmv18x = 0, is_at1700 = 0;
266 int slot, ret = -ENODEV;
267 struct net_local *lp = netdev_priv(dev);
268 DECLARE_MAC_BUF(mac);
270 if (!request_region(ioaddr, AT1700_IO_EXTENT, DRV_NAME))
271 return -EBUSY;
273 /* Resetting the chip doesn't reset the ISA interface, so don't bother.
274 That means we have to be careful with the register values we probe
275 for.
277 #ifdef notdef
278 printk("at1700 probe at %#x, eeprom is %4.4x %4.4x %4.4x ctrl %4.4x.\n",
279 ioaddr, read_eeprom(ioaddr, 4), read_eeprom(ioaddr, 5),
280 read_eeprom(ioaddr, 6), inw(ioaddr + EEPROM_Ctrl));
281 #endif
283 #ifdef CONFIG_MCA_LEGACY
284 /* rEnE (rene@bss.lu): got this from 3c509 driver source , adapted for AT1720 */
286 /* Based on Erik Nygren's (nygren@mit.edu) 3c529 patch, heavily
287 modified by Chris Beauregard (cpbeaure@csclub.uwaterloo.ca)
288 to support standard MCA probing. */
290 /* redone for multi-card detection by ZP Gu (zpg@castle.net) */
291 /* now works as a module */
293 if (MCA_bus) {
294 int j;
295 int l_i;
296 u_char pos3, pos4;
298 for (j = 0; at1720_mca_adapters[j].name != NULL; j ++) {
299 slot = 0;
300 while (slot != MCA_NOTFOUND) {
302 slot = mca_find_unused_adapter( at1720_mca_adapters[j].id, slot );
303 if (slot == MCA_NOTFOUND) break;
305 /* if we get this far, an adapter has been detected and is
306 enabled */
308 pos3 = mca_read_stored_pos( slot, 3 );
309 pos4 = mca_read_stored_pos( slot, 4 );
311 for (l_i = 0; l_i < 0x09; l_i++)
312 if (( pos3 & 0x07) == at1700_ioaddr_pattern[l_i])
313 break;
314 ioaddr = at1700_mca_probe_list[l_i];
316 for (irq = 0; irq < 0x10; irq++)
317 if (((((pos4>>4) & 0x0f) | (pos3 & 0xf0)) & 0xff) == at1700_irq_pattern[irq])
318 break;
320 /* probing for a card at a particular IO/IRQ */
321 if ((dev->irq && dev->irq != irq) ||
322 (dev->base_addr && dev->base_addr != ioaddr)) {
323 slot++; /* probing next slot */
324 continue;
327 dev->irq = irq;
329 /* claim the slot */
330 mca_set_adapter_name( slot, at1720_mca_adapters[j].name );
331 mca_mark_as_used(slot);
333 goto found;
336 /* if we get here, we didn't find an MCA adapter - try ISA */
338 #endif
339 slot = -1;
340 /* We must check for the EEPROM-config boards first, else accessing
341 IOCONFIG0 will move the board! */
342 if (at1700_probe_list[inb(ioaddr + IOCONFIG1) & 0x07] == ioaddr
343 && read_eeprom(ioaddr, 4) == 0x0000
344 && (read_eeprom(ioaddr, 5) & 0xff00) == 0xF400)
345 is_at1700 = 1;
346 else if (inb(ioaddr + SAPROM ) == 0x00
347 && inb(ioaddr + SAPROM + 1) == 0x00
348 && inb(ioaddr + SAPROM + 2) == 0x0e)
349 is_fmv18x = 1;
350 else {
351 goto err_out;
354 #ifdef CONFIG_MCA_LEGACY
355 found:
356 #endif
358 /* Reset the internal state machines. */
359 outb(0, ioaddr + RESET);
361 if (is_at1700) {
362 irq = at1700_irqmap[(read_eeprom(ioaddr, 12)&0x04)
363 | (read_eeprom(ioaddr, 0)>>14)];
364 } else {
365 /* Check PnP mode for FMV-183/184/183A/184A. */
366 /* This PnP routine is very poor. IO and IRQ should be known. */
367 if (inb(ioaddr + CARDSTATUS1) & 0x20) {
368 irq = dev->irq;
369 for (i = 0; i < 8; i++) {
370 if (irq == fmv_irqmap_pnp[i])
371 break;
373 if (i == 8) {
374 goto err_mca;
376 } else {
377 if (fmv18x_probe_list[inb(ioaddr + IOCONFIG) & 0x07] != ioaddr)
378 goto err_mca;
379 irq = fmv_irqmap[(inb(ioaddr + IOCONFIG)>>6) & 0x03];
383 printk("%s: %s found at %#3x, IRQ %d, address ", dev->name,
384 is_at1700 ? "AT1700" : "FMV-18X", ioaddr, irq);
386 dev->base_addr = ioaddr;
387 dev->irq = irq;
389 if (is_at1700) {
390 for(i = 0; i < 3; i++) {
391 unsigned short eeprom_val = read_eeprom(ioaddr, 4+i);
392 ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_val);
394 } else {
395 for(i = 0; i < 6; i++) {
396 unsigned char val = inb(ioaddr + SAPROM + i);
397 dev->dev_addr[i] = val;
400 printk("%s", print_mac(mac, dev->dev_addr));
402 /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
403 rather than 150 ohm shielded twisted pair compensation.
404 0x0000 == auto-sense the interface
405 0x0800 == use TP interface
406 0x1800 == use coax interface
409 const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"};
410 if (is_at1700) {
411 ushort setup_value = read_eeprom(ioaddr, 12);
412 dev->if_port = setup_value >> 8;
413 } else {
414 ushort setup_value = inb(ioaddr + CARDSTATUS);
415 switch (setup_value & 0x07) {
416 case 0x01: /* 10base5 */
417 case 0x02: /* 10base2 */
418 dev->if_port = 0x18; break;
419 case 0x04: /* 10baseT */
420 dev->if_port = 0x08; break;
421 default: /* auto-sense */
422 dev->if_port = 0x00; break;
425 printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
428 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
429 bus access, two 4K Tx queues, and disabled Tx and Rx. */
430 outb(0xda, ioaddr + CONFIG_0);
432 /* Set the station address in bank zero. */
433 outb(0x00, ioaddr + CONFIG_1);
434 for (i = 0; i < 6; i++)
435 outb(dev->dev_addr[i], ioaddr + PORT_OFFSET(8 + i));
437 /* Switch to bank 1 and set the multicast table to accept none. */
438 outb(0x04, ioaddr + CONFIG_1);
439 for (i = 0; i < 8; i++)
440 outb(0x00, ioaddr + PORT_OFFSET(8 + i));
443 /* Switch to bank 2 */
444 /* Lock our I/O address, and set manual processing mode for 16 collisions. */
445 outb(0x08, ioaddr + CONFIG_1);
446 outb(dev->if_port, ioaddr + MODE13);
447 outb(0x00, ioaddr + COL16CNTL);
449 if (net_debug)
450 printk(version);
452 memset(lp, 0, sizeof(struct net_local));
454 dev->open = net_open;
455 dev->stop = net_close;
456 dev->hard_start_xmit = net_send_packet;
457 dev->set_multicast_list = &set_rx_mode;
458 dev->tx_timeout = net_tx_timeout;
459 dev->watchdog_timeo = TX_TIMEOUT;
461 spin_lock_init(&lp->lock);
463 lp->jumpered = is_fmv18x;
464 lp->mca_slot = slot;
465 /* Snarf the interrupt vector now. */
466 ret = request_irq(irq, &net_interrupt, 0, DRV_NAME, dev);
467 if (ret) {
468 printk (" AT1700 at %#3x is unusable due to a conflict on"
469 "IRQ %d.\n", ioaddr, irq);
470 goto err_mca;
473 return 0;
475 err_mca:
476 #ifdef CONFIG_MCA_LEGACY
477 if (slot >= 0)
478 mca_mark_as_unused(slot);
479 #endif
480 err_out:
481 release_region(ioaddr, AT1700_IO_EXTENT);
482 return ret;
486 /* EEPROM_Ctrl bits. */
487 #define EE_SHIFT_CLK 0x40 /* EEPROM shift clock, in reg. 16. */
488 #define EE_CS 0x20 /* EEPROM chip select, in reg. 16. */
489 #define EE_DATA_WRITE 0x80 /* EEPROM chip data in, in reg. 17. */
490 #define EE_DATA_READ 0x80 /* EEPROM chip data out, in reg. 17. */
492 /* The EEPROM commands include the alway-set leading bit. */
493 #define EE_WRITE_CMD (5 << 6)
494 #define EE_READ_CMD (6 << 6)
495 #define EE_ERASE_CMD (7 << 6)
497 static int __init read_eeprom(long ioaddr, int location)
499 int i;
500 unsigned short retval = 0;
501 long ee_addr = ioaddr + EEPROM_Ctrl;
502 long ee_daddr = ioaddr + EEPROM_Data;
503 int read_cmd = location | EE_READ_CMD;
505 /* Shift the read command bits out. */
506 for (i = 9; i >= 0; i--) {
507 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
508 outb(EE_CS, ee_addr);
509 outb(dataval, ee_daddr);
510 outb(EE_CS | EE_SHIFT_CLK, ee_addr); /* EEPROM clock tick. */
512 outb(EE_DATA_WRITE, ee_daddr);
513 for (i = 16; i > 0; i--) {
514 outb(EE_CS, ee_addr);
515 outb(EE_CS | EE_SHIFT_CLK, ee_addr);
516 retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0);
519 /* Terminate the EEPROM access. */
520 outb(EE_CS, ee_addr);
521 outb(EE_SHIFT_CLK, ee_addr);
522 outb(0, ee_addr);
523 return retval;
528 static int net_open(struct net_device *dev)
530 struct net_local *lp = netdev_priv(dev);
531 int ioaddr = dev->base_addr;
533 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
534 bus access, and two 4K Tx queues. */
535 outb(0x5a, ioaddr + CONFIG_0);
537 /* Powerup, switch to register bank 2, and enable the Rx and Tx. */
538 outb(0xe8, ioaddr + CONFIG_1);
540 lp->tx_started = 0;
541 lp->tx_queue_ready = 1;
542 lp->rx_started = 0;
543 lp->tx_queue = 0;
544 lp->tx_queue_len = 0;
546 /* Turn on hardware Tx and Rx interrupts. */
547 outb(0x82, ioaddr + TX_INTR);
548 outb(0x81, ioaddr + RX_INTR);
550 /* Enable the IRQ on boards of fmv18x it is feasible. */
551 if (lp->jumpered) {
552 outb(0x80, ioaddr + IOCONFIG1);
555 netif_start_queue(dev);
556 return 0;
559 static void net_tx_timeout (struct net_device *dev)
561 struct net_local *lp = netdev_priv(dev);
562 int ioaddr = dev->base_addr;
564 printk ("%s: transmit timed out with status %04x, %s?\n", dev->name,
565 inw (ioaddr + STATUS), inb (ioaddr + TX_STATUS) & 0x80
566 ? "IRQ conflict" : "network cable problem");
567 printk ("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
568 dev->name, inw(ioaddr + TX_STATUS), inw(ioaddr + TX_INTR), inw(ioaddr + TX_MODE),
569 inw(ioaddr + CONFIG_0), inw(ioaddr + DATAPORT), inw(ioaddr + TX_START),
570 inw(ioaddr + MODE13 - 1), inw(ioaddr + RX_CTRL));
571 dev->stats.tx_errors++;
572 /* ToDo: We should try to restart the adaptor... */
573 outw(0xffff, ioaddr + MODE24);
574 outw (0xffff, ioaddr + TX_STATUS);
575 outb (0x5a, ioaddr + CONFIG_0);
576 outb (0xe8, ioaddr + CONFIG_1);
577 outw (0x8182, ioaddr + TX_INTR);
578 outb (0x00, ioaddr + TX_START);
579 outb (0x03, ioaddr + COL16CNTL);
581 dev->trans_start = jiffies;
583 lp->tx_started = 0;
584 lp->tx_queue_ready = 1;
585 lp->rx_started = 0;
586 lp->tx_queue = 0;
587 lp->tx_queue_len = 0;
589 netif_wake_queue(dev);
593 static int net_send_packet (struct sk_buff *skb, struct net_device *dev)
595 struct net_local *lp = netdev_priv(dev);
596 int ioaddr = dev->base_addr;
597 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
598 short len = skb->len;
599 unsigned char *buf = skb->data;
600 static u8 pad[ETH_ZLEN];
602 netif_stop_queue (dev);
604 /* We may not start transmitting unless we finish transferring
605 a packet into the Tx queue. During executing the following
606 codes we possibly catch a Tx interrupt. Thus we flag off
607 tx_queue_ready, so that we prevent the interrupt routine
608 (net_interrupt) to start transmitting. */
609 lp->tx_queue_ready = 0;
611 outw (length, ioaddr + DATAPORT);
612 /* Packet data */
613 outsw (ioaddr + DATAPORT, buf, len >> 1);
614 /* Check for dribble byte */
615 if (len & 1) {
616 outw(skb->data[skb->len-1], ioaddr + DATAPORT);
617 len++;
619 /* Check for packet padding */
620 if (length != skb->len)
621 outsw(ioaddr + DATAPORT, pad, (length - len + 1) >> 1);
623 lp->tx_queue++;
624 lp->tx_queue_len += length + 2;
626 lp->tx_queue_ready = 1;
628 if (lp->tx_started == 0) {
629 /* If the Tx is idle, always trigger a transmit. */
630 outb (0x80 | lp->tx_queue, ioaddr + TX_START);
631 lp->tx_queue = 0;
632 lp->tx_queue_len = 0;
633 dev->trans_start = jiffies;
634 lp->tx_started = 1;
635 netif_start_queue (dev);
636 } else if (lp->tx_queue_len < 4096 - 1502)
637 /* Yes, there is room for one more packet. */
638 netif_start_queue (dev);
639 dev_kfree_skb (skb);
641 return 0;
644 /* The typical workload of the driver:
645 Handle the network interface interrupts. */
646 static irqreturn_t net_interrupt(int irq, void *dev_id)
648 struct net_device *dev = dev_id;
649 struct net_local *lp;
650 int ioaddr, status;
651 int handled = 0;
653 if (dev == NULL) {
654 printk ("at1700_interrupt(): irq %d for unknown device.\n", irq);
655 return IRQ_NONE;
658 ioaddr = dev->base_addr;
659 lp = netdev_priv(dev);
661 spin_lock (&lp->lock);
663 status = inw(ioaddr + TX_STATUS);
664 outw(status, ioaddr + TX_STATUS);
666 if (net_debug > 4)
667 printk("%s: Interrupt with status %04x.\n", dev->name, status);
668 if (lp->rx_started == 0 &&
669 (status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) {
670 /* Got a packet(s).
671 We cannot execute net_rx more than once at the same time for
672 the same device. During executing net_rx, we possibly catch a
673 Tx interrupt. Thus we flag on rx_started, so that we prevent
674 the interrupt routine (net_interrupt) to dive into net_rx
675 again. */
676 handled = 1;
677 lp->rx_started = 1;
678 outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */
679 net_rx(dev);
680 outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */
681 lp->rx_started = 0;
683 if (status & 0x00ff) {
684 handled = 1;
685 if (status & 0x02) {
686 /* More than 16 collisions occurred */
687 if (net_debug > 4)
688 printk("%s: 16 Collision occur during Txing.\n", dev->name);
689 /* Cancel sending a packet. */
690 outb(0x03, ioaddr + COL16CNTL);
691 dev->stats.collisions++;
693 if (status & 0x82) {
694 dev->stats.tx_packets++;
695 /* The Tx queue has any packets and is not being
696 transferred a packet from the host, start
697 transmitting. */
698 if (lp->tx_queue && lp->tx_queue_ready) {
699 outb(0x80 | lp->tx_queue, ioaddr + TX_START);
700 lp->tx_queue = 0;
701 lp->tx_queue_len = 0;
702 dev->trans_start = jiffies;
703 netif_wake_queue (dev);
704 } else {
705 lp->tx_started = 0;
706 netif_wake_queue (dev);
711 spin_unlock (&lp->lock);
712 return IRQ_RETVAL(handled);
715 /* We have a good packet(s), get it/them out of the buffers. */
716 static void
717 net_rx(struct net_device *dev)
719 int ioaddr = dev->base_addr;
720 int boguscount = 5;
722 while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
723 ushort status = inw(ioaddr + DATAPORT);
724 ushort pkt_len = inw(ioaddr + DATAPORT);
726 if (net_debug > 4)
727 printk("%s: Rxing packet mode %02x status %04x.\n",
728 dev->name, inb(ioaddr + RX_MODE), status);
729 #ifndef final_version
730 if (status == 0) {
731 outb(0x05, ioaddr + RX_CTRL);
732 break;
734 #endif
736 if ((status & 0xF0) != 0x20) { /* There was an error. */
737 dev->stats.rx_errors++;
738 if (status & 0x08) dev->stats.rx_length_errors++;
739 if (status & 0x04) dev->stats.rx_frame_errors++;
740 if (status & 0x02) dev->stats.rx_crc_errors++;
741 if (status & 0x01) dev->stats.rx_over_errors++;
742 } else {
743 /* Malloc up new buffer. */
744 struct sk_buff *skb;
746 if (pkt_len > 1550) {
747 printk("%s: The AT1700 claimed a very large packet, size %d.\n",
748 dev->name, pkt_len);
749 /* Prime the FIFO and then flush the packet. */
750 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
751 outb(0x05, ioaddr + RX_CTRL);
752 dev->stats.rx_errors++;
753 break;
755 skb = dev_alloc_skb(pkt_len+3);
756 if (skb == NULL) {
757 printk("%s: Memory squeeze, dropping packet (len %d).\n",
758 dev->name, pkt_len);
759 /* Prime the FIFO and then flush the packet. */
760 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
761 outb(0x05, ioaddr + RX_CTRL);
762 dev->stats.rx_dropped++;
763 break;
765 skb_reserve(skb,2);
767 insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
768 skb->protocol=eth_type_trans(skb, dev);
769 netif_rx(skb);
770 dev->last_rx = jiffies;
771 dev->stats.rx_packets++;
772 dev->stats.rx_bytes += pkt_len;
774 if (--boguscount <= 0)
775 break;
778 /* If any worth-while packets have been received, dev_rint()
779 has done a mark_bh(NET_BH) for us and will work on them
780 when we get to the bottom-half routine. */
782 int i;
783 for (i = 0; i < 20; i++) {
784 if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
785 break;
786 inw(ioaddr + DATAPORT); /* dummy status read */
787 outb(0x05, ioaddr + RX_CTRL);
790 if (net_debug > 5)
791 printk("%s: Exint Rx packet with mode %02x after %d ticks.\n",
792 dev->name, inb(ioaddr + RX_MODE), i);
794 return;
797 /* The inverse routine to net_open(). */
798 static int net_close(struct net_device *dev)
800 struct net_local *lp = netdev_priv(dev);
801 int ioaddr = dev->base_addr;
803 netif_stop_queue(dev);
805 /* Set configuration register 0 to disable Tx and Rx. */
806 outb(0xda, ioaddr + CONFIG_0);
808 /* No statistic counters on the chip to update. */
810 /* Disable the IRQ on boards of fmv18x where it is feasible. */
811 if (lp->jumpered) {
812 outb(0x00, ioaddr + IOCONFIG1);
813 free_irq(dev->irq, dev);
816 /* Power-down the chip. Green, green, green! */
817 outb(0x00, ioaddr + CONFIG_1);
818 return 0;
822 Set the multicast/promiscuous mode for this adaptor.
825 static void
826 set_rx_mode(struct net_device *dev)
828 int ioaddr = dev->base_addr;
829 struct net_local *lp = netdev_priv(dev);
830 unsigned char mc_filter[8]; /* Multicast hash filter */
831 unsigned long flags;
832 int i;
834 if (dev->flags & IFF_PROMISC) {
835 memset(mc_filter, 0xff, sizeof(mc_filter));
836 outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */
837 } else if (dev->mc_count > MC_FILTERBREAK
838 || (dev->flags & IFF_ALLMULTI)) {
839 /* Too many to filter perfectly -- accept all multicasts. */
840 memset(mc_filter, 0xff, sizeof(mc_filter));
841 outb(2, ioaddr + RX_MODE); /* Use normal mode. */
842 } else if (dev->mc_count == 0) {
843 memset(mc_filter, 0x00, sizeof(mc_filter));
844 outb(1, ioaddr + RX_MODE); /* Ignore almost all multicasts. */
845 } else {
846 struct dev_mc_list *mclist;
847 int i;
849 memset(mc_filter, 0, sizeof(mc_filter));
850 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
851 i++, mclist = mclist->next) {
852 unsigned int bit =
853 ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 26;
854 mc_filter[bit >> 3] |= (1 << bit);
856 outb(0x02, ioaddr + RX_MODE); /* Use normal mode. */
859 spin_lock_irqsave (&lp->lock, flags);
860 if (memcmp(mc_filter, lp->mc_filter, sizeof(mc_filter))) {
861 int saved_bank = inw(ioaddr + CONFIG_0);
862 /* Switch to bank 1 and set the multicast table. */
863 outw((saved_bank & ~0x0C00) | 0x0480, ioaddr + CONFIG_0);
864 for (i = 0; i < 8; i++)
865 outb(mc_filter[i], ioaddr + PORT_OFFSET(8 + i));
866 memcpy(lp->mc_filter, mc_filter, sizeof(mc_filter));
867 outw(saved_bank, ioaddr + CONFIG_0);
869 spin_unlock_irqrestore (&lp->lock, flags);
870 return;
873 #ifdef MODULE
874 static struct net_device *dev_at1700;
876 module_param(io, int, 0);
877 module_param(irq, int, 0);
878 module_param(net_debug, int, 0);
879 MODULE_PARM_DESC(io, "AT1700/FMV18X I/O base address");
880 MODULE_PARM_DESC(irq, "AT1700/FMV18X IRQ number");
881 MODULE_PARM_DESC(net_debug, "AT1700/FMV18X debug level (0-6)");
883 int __init init_module(void)
885 if (io == 0)
886 printk("at1700: You should not use auto-probing with insmod!\n");
887 dev_at1700 = at1700_probe(-1);
888 if (IS_ERR(dev_at1700))
889 return PTR_ERR(dev_at1700);
890 return 0;
893 void __exit
894 cleanup_module(void)
896 unregister_netdev(dev_at1700);
897 cleanup_card(dev_at1700);
898 free_netdev(dev_at1700);
900 #endif /* MODULE */
901 MODULE_LICENSE("GPL");
905 * Local variables:
906 * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"
907 * alt-compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"
908 * tab-width: 4
909 * c-basic-offset: 4
910 * c-indent-level: 4
911 * End: