1 /* 3c507.c: An EtherLink16 device driver for Linux. */
3 Written 1993,1994 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
17 Thanks go to jennings@Montrouge.SMR.slb.com ( Patrick Jennings)
18 and jrs@world.std.com (Rick Sladkey) for testing and bugfixes.
19 Mark Salazar <leslie@access.digex.net> made the changes for cards with
20 only 16K packet buffers.
22 Things remaining to do:
23 Verify that the tx and rx buffers don't have fencepost errors.
24 Move the theory of operation and memory map documentation.
25 The statistics need to be updated correctly.
28 #define DRV_NAME "3c507"
29 #define DRV_VERSION "1.10a"
30 #define DRV_RELDATE "11/17/2001"
32 static const char version[] =
33 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n";
36 #include <linux/module.h>
40 This driver wouldn't have been written with the availability of the
41 Crynwr driver source code. It provided a known-working implementation
42 that filled in the gaping holes of the Intel documentation. Three cheers
45 Intel Microcommunications Databook, Vol. 1, 1990. It provides just enough
46 info that the casual reader might think that it documents the i82586 :-<.
49 #include <linux/kernel.h>
50 #include <linux/sched.h>
51 #include <linux/types.h>
52 #include <linux/fcntl.h>
53 #include <linux/interrupt.h>
54 #include <linux/ptrace.h>
55 #include <linux/ioport.h>
57 #include <linux/string.h>
58 #include <linux/spinlock.h>
59 #include <linux/ethtool.h>
61 #include <asm/uaccess.h>
62 #include <asm/system.h>
63 #include <asm/bitops.h>
66 #include <linux/errno.h>
68 #include <linux/netdevice.h>
69 #include <linux/etherdevice.h>
70 #include <linux/skbuff.h>
71 #include <linux/slab.h>
72 #include <linux/init.h>
75 /* use 0 for production, 1 for verification, 2..7 for debug */
79 static unsigned int net_debug = NET_DEBUG;
80 #define debug net_debug
83 /* A zero-terminated list of common I/O addresses to be probed. */
84 static unsigned int netcard_portlist[] __initdata =
85 { 0x300, 0x320, 0x340, 0x280, 0};
88 Details of the i82586.
90 You'll really need the databook to understand the details of this part,
91 but the outline is that the i82586 has two separate processing units.
92 Both are started from a list of three configuration tables, of which only
93 the last, the System Control Block (SCB), is used after reset-time. The SCB
94 has the following fields:
97 Tx/Command block addr.
99 The command word accepts the following controls for the Tx and Rx units:
102 #define CUC_START 0x0100
103 #define CUC_RESUME 0x0200
104 #define CUC_SUSPEND 0x0300
105 #define RX_START 0x0010
106 #define RX_RESUME 0x0020
107 #define RX_SUSPEND 0x0030
109 /* The Rx unit uses a list of frame descriptors and a list of data buffer
110 descriptors. We use full-sized (1518 byte) data buffers, so there is
111 a one-to-one pairing of frame descriptors to buffer descriptors.
113 The Tx ("command") unit executes a list of commands that look like:
114 Status word Written by the 82586 when the command is done.
115 Command word Command in lower 3 bits, post-command action in upper 3
116 Link word The address of the next command.
117 Parameters (as needed).
119 Some definitions related to the Command Word are:
121 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
122 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
123 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
126 CmdNOp = 0, CmdSASetup = 1, CmdConfigure = 2, CmdMulticastList = 3,
127 CmdTx = 4, CmdTDR = 5, CmdDump = 6, CmdDiagnose = 7};
129 /* Information that need to be kept for each board. */
131 struct net_device_stats stats;
138 ushort tx_pkts_in_ring;
143 Details of the EtherLink16 Implementation
144 The 3c507 is a generic shared-memory i82586 implementation.
145 The host can map 16K, 32K, 48K, or 64K of the 64K memory into
146 0x0[CD][08]0000, or all 64K into 0xF[02468]0000.
149 /* Offsets from the base I/O address. */
150 #define SA_DATA 0 /* Station address data, or 3Com signature. */
151 #define MISC_CTRL 6 /* Switch the SA_DATA banks, and bus config bits. */
152 #define RESET_IRQ 10 /* Reset the latched IRQ line. */
153 #define SIGNAL_CA 11 /* Frob the 82586 Channel Attention line. */
154 #define ROM_CONFIG 13
155 #define MEM_CONFIG 14
156 #define IRQ_CONFIG 15
157 #define EL16_IO_EXTENT 16
159 /* The ID port is used at boot-time to locate the ethercard. */
160 #define ID_PORT 0x100
162 /* Offsets to registers in the mailbox (SCB). */
163 #define iSCB_STATUS 0x8
165 #define iSCB_CBL 0xC /* Command BLock offset. */
166 #define iSCB_RFA 0xE /* Rx Frame Area offset. */
168 /* Since the 3c507 maps the shared memory window so that the last byte is
169 at 82586 address FFFF, the first byte is at 82586 address 0, 16K, 32K, or
170 48K corresponding to window sizes of 64K, 48K, 32K and 16K respectively.
171 We can account for this be setting the 'SBC Base' entry in the ISCP table
172 below for all the 16 bit offset addresses, and also adding the 'SCB Base'
173 value to all 24 bit physical addresses (in the SCP table and the TX and RX
177 #define SCB_BASE ((unsigned)64*1024 - (dev->mem_end - dev->mem_start))
180 What follows in 'init_words[]' is the "program" that is downloaded to the
181 82586 memory. It's mostly tables and command blocks, and starts at the
182 reset address 0xfffff6. This is designed to be similar to the EtherExpress,
183 thus the unusual location of the SCB at 0x0008.
185 Even with the additional "don't care" values, doing it this way takes less
186 program space than initializing the individual tables, and I feel it's much
189 The databook is particularly useless for the first two structures, I had
190 to use the Crynwr driver as an example.
192 The memory setup is as follows:
195 #define CONFIG_CMD 0x0018
196 #define SET_SA_CMD 0x0024
197 #define SA_OFFSET 0x002A
198 #define IDLELOOP 0x30
200 #define TDR_TIME 0x3C
201 #define DUMP_CMD 0x40
202 #define DIAG_CMD 0x48
203 #define SET_MC_CMD 0x4E
204 #define DUMP_DATA 0x56 /* A 170 byte buffer for dump and Set-MC into. */
206 #define TX_BUF_START 0x0100
207 #define NUM_TX_BUFS 5
208 #define TX_BUF_SIZE (1518+14+20+16) /* packet+header+TBD */
210 #define RX_BUF_START 0x2000
211 #define RX_BUF_SIZE (1518+14+18) /* packet+header+RBD */
212 #define RX_BUF_END (dev->mem_end - dev->mem_start)
217 That's it: only 86 bytes to set up the beast, including every extra
218 command available. The 170 byte buffer at DUMP_DATA is shared between the
219 Dump command (called only by the diagnostic program) and the SetMulticastList
222 To complete the memory setup you only have to write the station address at
223 SA_OFFSET and create the Tx & Rx buffer lists.
225 The Tx command chain and buffer list is setup as follows:
226 A Tx command table, with the data buffer pointing to...
227 A Tx data buffer descriptor. The packet is in a single buffer, rather than
228 chaining together several smaller buffers.
229 A NoOp command, which initially points to itself,
232 A transmit is done by filling in the Tx command table and data buffer,
233 re-writing the NoOp command, and finally changing the offset of the last
234 command to point to the current Tx command. When the Tx command is finished,
235 it jumps to the NoOp, when it loops until the next Tx command changes the
236 "link offset" in the NoOp. This way the 82586 never has to go through the
237 slow restart sequence.
239 The Rx buffer list is set up in the obvious ring structure. We have enough
240 memory (and low enough interrupt latency) that we can avoid the complicated
241 Rx buffer linked lists by alway associating a full-size Rx data buffer with
244 I current use four transmit buffers starting at TX_BUF_START (0x0100), and
245 use the rest of memory, from RX_BUF_START to RX_BUF_END, for Rx buffers.
249 static unsigned short init_words[] = {
250 /* System Configuration Pointer (SCP). */
251 0x0000, /* Set bus size to 16 bits. */
252 0,0, /* pad words. */
253 0x0000,0x0000, /* ISCP phys addr, set in init_82586_mem(). */
255 /* Intermediate System Configuration Pointer (ISCP). */
256 0x0001, /* Status word that's cleared when init is done. */
257 0x0008,0,0, /* SCB offset, (skip, skip) */
259 /* System Control Block (SCB). */
260 0,0xf000|RX_START|CUC_START, /* SCB status and cmd. */
261 CONFIG_CMD, /* Command list pointer, points to Configure. */
262 RX_BUF_START, /* Rx block list. */
263 0,0,0,0, /* Error count: CRC, align, buffer, overrun. */
265 /* 0x0018: Configure command. Change to put MAC data with packet. */
266 0, CmdConfigure, /* Status, command. */
267 SET_SA_CMD, /* Next command is Set Station Addr. */
268 0x0804, /* "4" bytes of config data, 8 byte FIFO. */
269 0x2e40, /* Magic values, including MAC data location. */
270 0, /* Unused pad word. */
272 /* 0x0024: Setup station address command. */
274 SET_MC_CMD, /* Next command. */
275 0xaa00,0xb000,0x0bad, /* Station address (to be filled in) */
277 /* 0x0030: NOP, looping back to itself. Point to first Tx buffer to Tx. */
278 0, CmdNOp, IDLELOOP, 0 /* pad */,
280 /* 0x0038: A unused Time-Domain Reflectometer command. */
281 0, CmdTDR, IDLELOOP, 0,
283 /* 0x0040: An unused Dump State command. */
284 0, CmdDump, IDLELOOP, DUMP_DATA,
286 /* 0x0048: An unused Diagnose command. */
287 0, CmdDiagnose, IDLELOOP,
289 /* 0x004E: An empty set-multicast-list command. */
290 0, CmdMulticastList, IDLELOOP, 0,
293 /* Index to functions, as function prototypes. */
295 extern int el16_probe(struct net_device *dev); /* Called from Space.c */
297 static int el16_probe1(struct net_device *dev, int ioaddr);
298 static int el16_open(struct net_device *dev);
299 static int el16_send_packet(struct sk_buff *skb, struct net_device *dev);
300 static void el16_interrupt(int irq, void *dev_id, struct pt_regs *regs);
301 static void el16_rx(struct net_device *dev);
302 static int el16_close(struct net_device *dev);
303 static struct net_device_stats *el16_get_stats(struct net_device *dev);
304 static void el16_tx_timeout (struct net_device *dev);
306 static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad);
307 static void init_82586_mem(struct net_device *dev);
308 static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
311 /* Check for a network adaptor of this type, and return '0' iff one exists.
312 If dev->base_addr == 0, probe all likely locations.
313 If dev->base_addr == 1, always return failure.
314 If dev->base_addr == 2, (detachable devices only) allocate space for the
315 device and return success.
318 int __init el16_probe(struct net_device *dev)
320 int base_addr = dev->base_addr;
323 SET_MODULE_OWNER(dev);
325 if (base_addr > 0x1ff) /* Check a single specified location. */
326 return el16_probe1(dev, base_addr);
327 else if (base_addr != 0)
328 return -ENXIO; /* Don't probe at all. */
330 for (i = 0; netcard_portlist[i]; i++)
331 if (el16_probe1(dev, netcard_portlist[i]) == 0)
337 static int __init el16_probe1(struct net_device *dev, int ioaddr)
339 static unsigned char init_ID_done, version_printed;
340 int i, irq, irqval, retval;
341 struct net_local *lp;
343 if (init_ID_done == 0) {
344 ushort lrs_state = 0xff;
345 /* Send the ID sequence to the ID_PORT to enable the board(s). */
347 for(i = 0; i < 255; i++) {
348 outb(lrs_state, ID_PORT);
350 if (lrs_state & 0x100)
357 if (!request_region(ioaddr, EL16_IO_EXTENT, dev->name))
360 if ((inb(ioaddr) != '*') || (inb(ioaddr + 1) != '3') ||
361 (inb(ioaddr + 2) != 'C') || (inb(ioaddr + 3) != 'O')) {
366 if (net_debug && version_printed++ == 0)
369 printk("%s: 3c507 at %#x,", dev->name, ioaddr);
371 /* We should make a few more checks here, like the first three octets of
372 the S.A. for the manufacturer's code. */
374 irq = inb(ioaddr + IRQ_CONFIG) & 0x0f;
376 irqval = request_irq(irq, &el16_interrupt, 0, dev->name, dev);
378 printk ("unable to get IRQ %d (irqval=%d).\n", irq, irqval);
383 /* We've committed to using the board, and can start filling in *dev. */
384 dev->base_addr = ioaddr;
386 outb(0x01, ioaddr + MISC_CTRL);
387 for (i = 0; i < 6; i++) {
388 dev->dev_addr[i] = inb(ioaddr + i);
389 printk(" %02x", dev->dev_addr[i]);
392 if ((dev->mem_start & 0xf) > 0)
393 net_debug = dev->mem_start & 7;
396 dev->mem_start = MEM_BASE;
397 dev->mem_end = dev->mem_start + 0x10000;
402 char mem_config = inb(ioaddr + MEM_CONFIG);
403 if (mem_config & 0x20) {
405 base = 0xf00000 + (mem_config & 0x08 ? 0x080000
406 : ((mem_config & 3) << 17));
408 size = ((mem_config & 3) + 1) << 14;
409 base = 0x0c0000 + ( (mem_config & 0x18) << 12);
411 dev->mem_start = base;
412 dev->mem_end = base + size;
416 dev->if_port = (inb(ioaddr + ROM_CONFIG) & 0x80) ? 1 : 0;
417 dev->irq = inb(ioaddr + IRQ_CONFIG) & 0x0f;
419 printk(", IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->irq,
420 dev->if_port ? "ex" : "in", dev->mem_start, dev->mem_end-1);
425 /* Initialize the device structure. */
426 lp = dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
427 if (dev->priv == NULL) {
431 memset(dev->priv, 0, sizeof(struct net_local));
432 spin_lock_init(&lp->lock);
434 dev->open = el16_open;
435 dev->stop = el16_close;
436 dev->hard_start_xmit = el16_send_packet;
437 dev->get_stats = el16_get_stats;
438 dev->tx_timeout = el16_tx_timeout;
439 dev->watchdog_timeo = TX_TIMEOUT;
440 dev->do_ioctl = netdev_ioctl;
442 ether_setup(dev); /* Generic ethernet behaviour */
444 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
448 release_region(ioaddr, EL16_IO_EXTENT);
452 static int el16_open(struct net_device *dev)
454 /* Initialize the 82586 memory and start it. */
457 netif_start_queue(dev);
462 static void el16_tx_timeout (struct net_device *dev)
464 struct net_local *lp = (struct net_local *) dev->priv;
465 int ioaddr = dev->base_addr;
466 unsigned long shmem = dev->mem_start;
469 printk ("%s: transmit timed out, %s? ", dev->name,
470 isa_readw (shmem + iSCB_STATUS) & 0x8000 ? "IRQ conflict" :
471 "network cable problem");
472 /* Try to restart the adaptor. */
473 if (lp->last_restart == lp->stats.tx_packets) {
475 printk ("Resetting board.\n");
476 /* Completely reset the adaptor. */
477 init_82586_mem (dev);
478 lp->tx_pkts_in_ring = 0;
480 /* Issue the channel attention signal and hope it "gets better". */
482 printk ("Kicking board.\n");
483 isa_writew (0xf000 | CUC_START | RX_START, shmem + iSCB_CMD);
484 outb (0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */
485 lp->last_restart = lp->stats.tx_packets;
487 dev->trans_start = jiffies;
488 netif_wake_queue (dev);
492 static int el16_send_packet (struct sk_buff *skb, struct net_device *dev)
494 struct net_local *lp = (struct net_local *) dev->priv;
495 int ioaddr = dev->base_addr;
497 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
498 unsigned char *buf = skb->data;
500 netif_stop_queue (dev);
502 spin_lock_irqsave (&lp->lock, flags);
504 lp->stats.tx_bytes += length;
505 /* Disable the 82586's input to the interrupt line. */
506 outb (0x80, ioaddr + MISC_CTRL);
508 hardware_send_packet (dev, buf, skb->len, length - skb->len);
510 dev->trans_start = jiffies;
511 /* Enable the 82586 interrupt input. */
512 outb (0x84, ioaddr + MISC_CTRL);
514 spin_unlock_irqrestore (&lp->lock, flags);
518 /* You might need to clean up and record Tx statistics here. */
523 /* The typical workload of the driver:
524 Handle the network interface interrupts. */
525 static void el16_interrupt(int irq, void *dev_id, struct pt_regs *regs)
527 struct net_device *dev = dev_id;
528 struct net_local *lp;
529 int ioaddr, status, boguscount = 0;
534 printk ("net_interrupt(): irq %d for unknown device.\n", irq);
538 ioaddr = dev->base_addr;
539 lp = (struct net_local *)dev->priv;
540 shmem = dev->mem_start;
542 spin_lock(&lp->lock);
544 status = isa_readw(shmem+iSCB_STATUS);
547 printk("%s: 3c507 interrupt, status %4.4x.\n", dev->name, status);
550 /* Disable the 82586's input to the interrupt line. */
551 outb(0x80, ioaddr + MISC_CTRL);
553 /* Reap the Tx packet buffers. */
554 while (lp->tx_pkts_in_ring) {
555 unsigned short tx_status = isa_readw(shmem+lp->tx_reap);
556 if (!(tx_status & 0x8000)) {
558 printk("Tx command incomplete (%#x).\n", lp->tx_reap);
561 /* Tx unsuccessful or some interesting status bit set. */
562 if (!(tx_status & 0x2000) || (tx_status & 0x0f3f)) {
563 lp->stats.tx_errors++;
564 if (tx_status & 0x0600) lp->stats.tx_carrier_errors++;
565 if (tx_status & 0x0100) lp->stats.tx_fifo_errors++;
566 if (!(tx_status & 0x0040)) lp->stats.tx_heartbeat_errors++;
567 if (tx_status & 0x0020) lp->stats.tx_aborted_errors++;
568 lp->stats.collisions += tx_status & 0xf;
570 lp->stats.tx_packets++;
572 printk("Reaped %x, Tx status %04x.\n" , lp->tx_reap, tx_status);
573 lp->tx_reap += TX_BUF_SIZE;
574 if (lp->tx_reap > RX_BUF_START - TX_BUF_SIZE)
575 lp->tx_reap = TX_BUF_START;
577 lp->tx_pkts_in_ring--;
578 /* There is always more space in the Tx ring buffer now. */
579 netif_wake_queue(dev);
581 if (++boguscount > 10)
585 if (status & 0x4000) { /* Packet received. */
587 printk("Received packet, rx_head %04x.\n", lp->rx_head);
591 /* Acknowledge the interrupt sources. */
592 ack_cmd = status & 0xf000;
594 if ((status & 0x0700) != 0x0200 && netif_running(dev)) {
596 printk("%s: Command unit stopped, status %04x, restarting.\n",
598 /* If this ever occurs we should really re-write the idle loop, reset
599 the Tx list, and do a complete restart of the command unit.
600 For now we rely on the Tx timeout if the resume doesn't work. */
601 ack_cmd |= CUC_RESUME;
604 if ((status & 0x0070) != 0x0040 && netif_running(dev)) {
605 static void init_rx_bufs(struct net_device *);
606 /* The Rx unit is not ready, it must be hung. Restart the receiver by
607 initializing the rx buffers, and issuing an Rx start command. */
609 printk("%s: Rx unit stopped, status %04x, restarting.\n",
612 isa_writew(RX_BUF_START,shmem+iSCB_RFA);
616 isa_writew(ack_cmd,shmem+iSCB_CMD);
617 outb(0, ioaddr + SIGNAL_CA); /* Issue channel-attn. */
619 /* Clear the latched interrupt. */
620 outb(0, ioaddr + RESET_IRQ);
622 /* Enable the 82586's interrupt input. */
623 outb(0x84, ioaddr + MISC_CTRL);
624 spin_unlock(&lp->lock);
627 static int el16_close(struct net_device *dev)
629 int ioaddr = dev->base_addr;
630 unsigned long shmem = dev->mem_start;
632 netif_stop_queue(dev);
634 /* Flush the Tx and disable Rx. */
635 isa_writew(RX_SUSPEND | CUC_SUSPEND,shmem+iSCB_CMD);
636 outb(0, ioaddr + SIGNAL_CA);
638 /* Disable the 82586's input to the interrupt line. */
639 outb(0x80, ioaddr + MISC_CTRL);
641 /* We always physically use the IRQ line, so we don't do free_irq(). */
643 /* Update the statistics here. */
648 /* Get the current statistics. This may be called with the card open or
650 static struct net_device_stats *el16_get_stats(struct net_device *dev)
652 struct net_local *lp = (struct net_local *)dev->priv;
654 /* ToDo: decide if there are any useful statistics from the SCB. */
659 /* Initialize the Rx-block list. */
660 static void init_rx_bufs(struct net_device *dev)
662 struct net_local *lp = (struct net_local *)dev->priv;
663 unsigned long write_ptr;
664 unsigned short SCB_base = SCB_BASE;
666 int cur_rxbuf = lp->rx_head = RX_BUF_START;
668 /* Initialize each Rx frame + data buffer. */
669 do { /* While there is room for one more. */
671 write_ptr = dev->mem_start + cur_rxbuf;
673 isa_writew(0x0000,write_ptr); /* Status */
674 isa_writew(0x0000,write_ptr+=2); /* Command */
675 isa_writew(cur_rxbuf + RX_BUF_SIZE,write_ptr+=2); /* Link */
676 isa_writew(cur_rxbuf + 22,write_ptr+=2); /* Buffer offset */
677 isa_writew(0x0000,write_ptr+=2); /* Pad for dest addr. */
678 isa_writew(0x0000,write_ptr+=2);
679 isa_writew(0x0000,write_ptr+=2);
680 isa_writew(0x0000,write_ptr+=2); /* Pad for source addr. */
681 isa_writew(0x0000,write_ptr+=2);
682 isa_writew(0x0000,write_ptr+=2);
683 isa_writew(0x0000,write_ptr+=2); /* Pad for protocol. */
685 isa_writew(0x0000,write_ptr+=2); /* Buffer: Actual count */
686 isa_writew(-1,write_ptr+=2); /* Buffer: Next (none). */
687 isa_writew(cur_rxbuf + 0x20 + SCB_base,write_ptr+=2);/* Buffer: Address low */
688 isa_writew(0x0000,write_ptr+=2);
689 /* Finally, the number of bytes in the buffer. */
690 isa_writew(0x8000 + RX_BUF_SIZE-0x20,write_ptr+=2);
692 lp->rx_tail = cur_rxbuf;
693 cur_rxbuf += RX_BUF_SIZE;
694 } while (cur_rxbuf <= RX_BUF_END - RX_BUF_SIZE);
696 /* Terminate the list by setting the EOL bit, and wrap the pointer to make
698 write_ptr = dev->mem_start + lp->rx_tail + 2;
699 isa_writew(0xC000,write_ptr); /* Command, mark as last. */
700 isa_writew(lp->rx_head,write_ptr+2); /* Link */
703 static void init_82586_mem(struct net_device *dev)
705 struct net_local *lp = (struct net_local *)dev->priv;
706 short ioaddr = dev->base_addr;
707 unsigned long shmem = dev->mem_start;
709 /* Enable loopback to protect the wire while starting up,
710 and hold the 586 in reset during the memory initialization. */
711 outb(0x20, ioaddr + MISC_CTRL);
713 /* Fix the ISCP address and base. */
714 init_words[3] = SCB_BASE;
715 init_words[7] = SCB_BASE;
717 /* Write the words at 0xfff6 (address-aliased to 0xfffff6). */
718 isa_memcpy_toio(dev->mem_end-10, init_words, 10);
720 /* Write the words at 0x0000. */
721 isa_memcpy_toio(dev->mem_start, init_words + 5, sizeof(init_words) - 10);
723 /* Fill in the station address. */
724 isa_memcpy_toio(dev->mem_start+SA_OFFSET, dev->dev_addr,
725 sizeof(dev->dev_addr));
727 /* The Tx-block list is written as needed. We just set up the values. */
728 lp->tx_cmd_link = IDLELOOP + 4;
729 lp->tx_head = lp->tx_reap = TX_BUF_START;
733 /* Start the 586 by releasing the reset line, but leave loopback. */
734 outb(0xA0, ioaddr + MISC_CTRL);
736 /* This was time consuming to track down: you need to give two channel
737 attention signals to reliably start up the i82586. */
738 outb(0, ioaddr + SIGNAL_CA);
742 while (isa_readw(shmem+iSCB_STATUS) == 0)
743 if (--boguscnt == 0) {
744 printk("%s: i82586 initialization timed out with status %04x,"
745 "cmd %04x.\n", dev->name,
746 isa_readw(shmem+iSCB_STATUS), isa_readw(shmem+iSCB_CMD));
749 /* Issue channel-attn -- the 82586 won't start. */
750 outb(0, ioaddr + SIGNAL_CA);
753 /* Disable loopback and enable interrupts. */
754 outb(0x84, ioaddr + MISC_CTRL);
756 printk("%s: Initialized 82586, status %04x.\n", dev->name,
757 isa_readw(shmem+iSCB_STATUS));
761 static void hardware_send_packet(struct net_device *dev, void *buf, short length, short pad)
763 struct net_local *lp = (struct net_local *)dev->priv;
764 short ioaddr = dev->base_addr;
765 ushort tx_block = lp->tx_head;
766 unsigned long write_ptr = dev->mem_start + tx_block;
767 static char padding[ETH_ZLEN];
769 /* Set the write pointer to the Tx block, and put out the header. */
770 isa_writew(0x0000,write_ptr); /* Tx status */
771 isa_writew(CMD_INTR|CmdTx,write_ptr+=2); /* Tx command */
772 isa_writew(tx_block+16,write_ptr+=2); /* Next command is a NoOp. */
773 isa_writew(tx_block+8,write_ptr+=2); /* Data Buffer offset. */
775 /* Output the data buffer descriptor. */
776 isa_writew((pad + length) | 0x8000,write_ptr+=2); /* Byte count parameter. */
777 isa_writew(-1,write_ptr+=2); /* No next data buffer. */
778 isa_writew(tx_block+22+SCB_BASE,write_ptr+=2); /* Buffer follows the NoOp command. */
779 isa_writew(0x0000,write_ptr+=2); /* Buffer address high bits (always zero). */
781 /* Output the Loop-back NoOp command. */
782 isa_writew(0x0000,write_ptr+=2); /* Tx status */
783 isa_writew(CmdNOp,write_ptr+=2); /* Tx command */
784 isa_writew(tx_block+16,write_ptr+=2); /* Next is myself. */
786 /* Output the packet at the write pointer. */
787 isa_memcpy_toio(write_ptr+2, buf, length);
789 isa_memcpy_toio(write_ptr+length+2, padding, pad);
791 /* Set the old command link pointing to this send packet. */
792 isa_writew(tx_block,dev->mem_start + lp->tx_cmd_link);
793 lp->tx_cmd_link = tx_block + 20;
795 /* Set the next free tx region. */
796 lp->tx_head = tx_block + TX_BUF_SIZE;
797 if (lp->tx_head > RX_BUF_START - TX_BUF_SIZE)
798 lp->tx_head = TX_BUF_START;
801 printk("%s: 3c507 @%x send length = %d, tx_block %3x, next %3x.\n",
802 dev->name, ioaddr, length, tx_block, lp->tx_head);
805 /* Grimly block further packets if there has been insufficient reaping. */
806 if (++lp->tx_pkts_in_ring < NUM_TX_BUFS)
807 netif_wake_queue(dev);
810 static void el16_rx(struct net_device *dev)
812 struct net_local *lp = (struct net_local *)dev->priv;
813 unsigned long shmem = dev->mem_start;
814 ushort rx_head = lp->rx_head;
815 ushort rx_tail = lp->rx_tail;
816 ushort boguscount = 10;
819 while ((frame_status = isa_readw(shmem+rx_head)) < 0) { /* Command complete */
820 unsigned long read_frame = dev->mem_start + rx_head;
821 ushort rfd_cmd = isa_readw(read_frame+2);
822 ushort next_rx_frame = isa_readw(read_frame+4);
823 ushort data_buffer_addr = isa_readw(read_frame+6);
824 unsigned long data_frame = dev->mem_start + data_buffer_addr;
825 ushort pkt_len = isa_readw(data_frame);
827 if (rfd_cmd != 0 || data_buffer_addr != rx_head + 22
828 || (pkt_len & 0xC000) != 0xC000) {
829 printk("%s: Rx frame at %#x corrupted, status %04x cmd %04x"
830 "next %04x data-buf @%04x %04x.\n", dev->name, rx_head,
831 frame_status, rfd_cmd, next_rx_frame, data_buffer_addr,
833 } else if ((frame_status & 0x2000) == 0) {
834 /* Frame Rxed, but with error. */
835 lp->stats.rx_errors++;
836 if (frame_status & 0x0800) lp->stats.rx_crc_errors++;
837 if (frame_status & 0x0400) lp->stats.rx_frame_errors++;
838 if (frame_status & 0x0200) lp->stats.rx_fifo_errors++;
839 if (frame_status & 0x0100) lp->stats.rx_over_errors++;
840 if (frame_status & 0x0080) lp->stats.rx_length_errors++;
842 /* Malloc up new buffer. */
846 skb = dev_alloc_skb(pkt_len+2);
848 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
849 lp->stats.rx_dropped++;
856 /* 'skb->data' points to the start of sk_buff data area. */
857 isa_memcpy_fromio(skb_put(skb,pkt_len), data_frame + 10, pkt_len);
859 skb->protocol=eth_type_trans(skb,dev);
861 dev->last_rx = jiffies;
862 lp->stats.rx_packets++;
863 lp->stats.rx_bytes += pkt_len;
866 /* Clear the status word and set End-of-List on the rx frame. */
867 isa_writew(0,read_frame);
868 isa_writew(0xC000,read_frame+2);
869 /* Clear the end-of-list on the prev. RFD. */
870 isa_writew(0x0000,dev->mem_start + rx_tail + 2);
873 rx_head = next_rx_frame;
874 if (--boguscount == 0)
878 lp->rx_head = rx_head;
879 lp->rx_tail = rx_tail;
883 * netdev_ethtool_ioctl: Handle network interface SIOCETHTOOL ioctls
884 * @dev: network interface on which out-of-band action is to be performed
885 * @useraddr: userspace address to which data is to be read and returned
887 * Process the various commands of the SIOCETHTOOL interface.
890 static int netdev_ethtool_ioctl (struct net_device *dev, void *useraddr)
894 /* dev_ioctl() in ../../net/core/dev.c has already checked
895 capable(CAP_NET_ADMIN), so don't bother with that here. */
897 if (get_user(ethcmd, (u32 *)useraddr))
902 case ETHTOOL_GDRVINFO: {
903 struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
904 strcpy (info.driver, DRV_NAME);
905 strcpy (info.version, DRV_VERSION);
906 sprintf(info.bus_info, "ISA 0x%lx", dev->base_addr);
907 if (copy_to_user (useraddr, &info, sizeof (info)))
912 /* get message-level */
913 case ETHTOOL_GMSGLVL: {
914 struct ethtool_value edata = {ETHTOOL_GMSGLVL};
916 if (copy_to_user(useraddr, &edata, sizeof(edata)))
920 /* set message-level */
921 case ETHTOOL_SMSGLVL: {
922 struct ethtool_value edata;
923 if (copy_from_user(&edata, useraddr, sizeof(edata)))
937 * netdev_ioctl: Handle network interface ioctls
938 * @dev: network interface on which out-of-band action is to be performed
939 * @rq: user request data
940 * @cmd: command issued by user
942 * Process the various out-of-band ioctls passed to this driver.
945 static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
951 rc = netdev_ethtool_ioctl(dev, (void *) rq->ifr_data);
964 static struct net_device dev_3c507;
965 static int io = 0x300;
967 MODULE_PARM(io, "i");
968 MODULE_PARM(irq, "i");
969 MODULE_PARM_DESC(io, "EtherLink16 I/O base address");
970 MODULE_PARM_DESC(irq, "(ignored)");
972 int init_module(void)
975 printk("3c507: You should not use auto-probing with insmod!\n");
976 dev_3c507.base_addr = io;
978 dev_3c507.init = el16_probe;
979 if (register_netdev(&dev_3c507) != 0) {
980 printk("3c507: register_netdev() returned non-zero.\n");
989 unregister_netdev(&dev_3c507);
990 kfree(dev_3c507.priv);
991 dev_3c507.priv = NULL;
993 /* If we don't do this, we can't re-insmod it later. */
994 free_irq(dev_3c507.irq, &dev_3c507);
995 release_region(dev_3c507.base_addr, EL16_IO_EXTENT);
998 MODULE_LICENSE("GPL");
1003 * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -I/usr/src/linux/drivers/net -Wall -Wstrict-prototypes -O6 -m486 -c 3c507.c"
1004 * version-control: t
1005 * kept-new-versions: 5