1 /* Intel Professional Workstation/panther ethernet driver */
2 /* lp486e.c: A panther 82596 ethernet driver for linux. */
4 History and copyrights:
7 Written 1993 by Donald Becker.
8 Copyright 1993 United States Government as represented by the Director,
9 National Security Agency. This software may only be used and
10 distributed according to the terms of the GNU General Public License
11 as modified by SRC, incorporated herein by reference.
13 The author may be reached as becker@scyld.com, or C/O
14 Scyld Computing Corporation
15 410 Severn Ave., Suite 210
19 Written 1994 by Mark Evans.
20 This driver is for the Apricot 82596 bus-master interface
22 Modularised 12/94 Mark Evans
24 Professional Workstation
25 Derived from apricot.c by Ard van Breemen
26 <ard@murphy.nl>|<ard@cstmel.hobby.nl>|<ard@cstmel.nl.eu.org>
29 Thanks to Murphy Software BV for letting me write this in their time.
30 Well, actually, I get payed doing this...
31 (Also: see http://www.murphy.nl for murphy, and my homepage ~ard for
32 more information on the Professional Workstation)
38 There are currently two motherboards that I know of in the
39 professional workstation. The only one that I know is the
40 intel panther motherboard. -- ard
43 The pws is equipped with an intel 82596. This is a very intelligent controller
44 which runs its own micro-code. Communication with the hostprocessor is done
45 through linked lists of commands and buffers in the hostprocessors memory.
46 A complete description of the 82596 is available from intel. Search for
47 a file called "29021806.pdf". It is a complete description of the chip itself.
48 To use it for the pws some additions are needed regarding generation of
49 the PORT and CA signal, and the interrupt glue needed for a pc.
51 PORT SIZE ACTION MEANING
52 0xCB0 2 WRITE Lower 16 bits for PORT command
53 0xCB2 2 WRITE Upper 16 bits for PORT command, and issue of PORT command
54 0xCB4 1 WRITE Generation of CA signal
55 0xCB8 1 WRITE Clear interrupt glue
56 All other communication is through memory!
59 #define SLOW_DOWN_IO udelay(5)
61 #include <linux/module.h>
62 #include <linux/init.h>
63 #include <linux/delay.h>
64 #include <linux/kernel.h>
65 #include <linux/string.h>
66 #include <linux/errno.h>
67 #include <linux/ioport.h>
68 #include <linux/slab.h>
69 #include <linux/interrupt.h>
70 #include <linux/netdevice.h>
71 #include <linux/etherdevice.h>
72 #include <linux/skbuff.h>
73 #include <linux/bitops.h>
78 #define DRV_NAME "lp486e"
80 /* debug print flags */
81 #define LOG_SRCDST 0x80000000
82 #define LOG_STATINT 0x40000000
83 #define LOG_STARTINT 0x20000000
85 #define i596_debug debug
87 static int i596_debug = 0;
89 static const char * const medianame[] = {
91 "10baseT-FD", "AUI-FD",
94 #define LP486E_TOTAL_SIZE 16
96 #define I596_NULL (0xffffffff)
98 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
99 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
100 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
102 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
108 CmdMulticastList = 3,
116 static const char *CUcmdnames[8] = { "NOP", "IASetup", "Configure", "MulticastList",
117 "Tx", "TDR", "Dump", "Diagnose" };
120 /* Status word bits */
121 #define STAT_CX 0x8000 /* The CU finished executing a command
122 with the Interrupt bit set */
123 #define STAT_FR 0x4000 /* The RU finished receiving a frame */
124 #define STAT_CNA 0x2000 /* The CU left the active state */
125 #define STAT_RNR 0x1000 /* The RU left the active state */
126 #define STAT_ACK (STAT_CX | STAT_FR | STAT_CNA | STAT_RNR)
127 #define STAT_CUS 0x0700 /* Status of CU: 0: idle, 1: suspended,
128 2: active, 3-7: unused */
129 #define STAT_RUS 0x00f0 /* Status of RU: 0: idle, 1: suspended,
130 2: no resources, 4: ready,
131 10: no resources due to no more RBDs,
132 12: no more RBDs, other: unused */
133 #define STAT_T 0x0008 /* Bus throttle timers loaded */
134 #define STAT_ZERO 0x0807 /* Always zero */
137 static char *CUstates[8] = {
138 "idle", "suspended", "active", 0, 0, 0, 0, 0
140 static char *RUstates[16] = {
141 "idle", "suspended", "no resources", 0, "ready", 0, 0, 0,
142 0, 0, "no RBDs", 0, "out of RBDs", 0, 0, 0
146 i596_out_status(int status) {
150 printk("status %4.4x:", status);
151 if (status == 0xffff)
152 printk(" strange..\n");
154 if (status & STAT_CX)
156 if (status & STAT_CNA)
157 printk(" CU stopped");
158 if (status & STAT_FR)
159 printk(" got a frame");
160 if (status & STAT_RNR)
161 printk(" RU stopped");
163 printk(" throttled");
164 if (status & STAT_ZERO)
166 s = CUstates[(status & STAT_CUS) >> 8];
170 printk(" CU(%s)", s);
171 s = RUstates[(status & STAT_RUS) >> 4];
175 printk(" RU(%s)", s);
177 printk(" bad status");
183 /* Command word bits */
184 #define ACK_CX 0x8000
185 #define ACK_FR 0x4000
186 #define ACK_CNA 0x2000
187 #define ACK_RNR 0x1000
189 #define CUC_START 0x0100
190 #define CUC_RESUME 0x0200
191 #define CUC_SUSPEND 0x0300
192 #define CUC_ABORT 0x0400
194 #define RX_START 0x0010
195 #define RX_RESUME 0x0020
196 #define RX_SUSPEND 0x0030
197 #define RX_ABORT 0x0040
199 typedef u32 phys_addr;
201 static inline phys_addr
203 return x ? virt_to_bus(x) : I596_NULL;
207 pa_to_va(phys_addr x) {
208 return (x == I596_NULL) ? NULL : bus_to_virt(x);
211 /* status bits for cmd */
212 #define CMD_STAT_C 0x8000 /* CU command complete */
213 #define CMD_STAT_B 0x4000 /* CU command in progress */
214 #define CMD_STAT_OK 0x2000 /* CU command completed without errors */
215 #define CMD_STAT_A 0x1000 /* CU command abnormally terminated */
217 struct i596_cmd { /* 8 bytes */
218 unsigned short status;
219 unsigned short command;
220 phys_addr pa_next; /* va_to_pa(struct i596_cmd *next) */
224 #define SIZE_MASK 0x3fff
229 phys_addr pa_next; /* va_to_pa(struct i596_tbd *next) */
230 phys_addr pa_data; /* va_to_pa(char *data) */
236 phys_addr pa_tbd; /* va_to_pa(struct i596_tbd *tbd) */
241 /* status bits for rfd */
242 #define RFD_STAT_C 0x8000 /* Frame reception complete */
243 #define RFD_STAT_B 0x4000 /* Frame reception in progress */
244 #define RFD_STAT_OK 0x2000 /* Frame received without errors */
245 #define RFD_STATUS 0x1fff
246 #define RFD_LENGTH_ERR 0x1000
247 #define RFD_CRC_ERR 0x0800
248 #define RFD_ALIGN_ERR 0x0400
249 #define RFD_NOBUFS_ERR 0x0200
250 #define RFD_DMA_ERR 0x0100 /* DMA overrun failure to acquire system bus */
251 #define RFD_SHORT_FRAME_ERR 0x0080
252 #define RFD_NOEOP_ERR 0x0040
253 #define RFD_TRUNC_ERR 0x0020
254 #define RFD_MULTICAST 0x0002 /* 0: destination had our address
255 1: destination was broadcast/multicast */
256 #define RFD_COLLISION 0x0001
258 /* receive frame descriptor */
262 phys_addr pa_next; /* va_to_pa(struct i596_rfd *next) */
263 phys_addr pa_rbd; /* va_to_pa(struct i596_rbd *rbd) */
264 unsigned short count;
269 #define RBD_EL 0x8000
271 #define RBD_SIZEMASK 0x3fff
272 #define RBD_EOF 0x8000
275 /* receive buffer descriptor */
279 phys_addr pa_next; /* va_to_pa(struct i596_tbd *next) */
280 phys_addr pa_data; /* va_to_pa(char *data) */
281 phys_addr pa_prev; /* va_to_pa(struct i596_tbd *prev) */
283 /* Driver private part */
287 #define RX_RING_SIZE 64
288 #define RX_SKBSIZE (ETH_FRAME_LEN+10)
289 #define RX_RBD_SIZE 32
291 /* System Control Block - 40 bytes */
295 phys_addr pa_cmd; /* 4 - va_to_pa(struct i596_cmd *cmd) */
296 phys_addr pa_rfd; /* 8 - va_to_pa(struct i596_rfd *rfd) */
297 u32 crc_err; /* 12 */
298 u32 align_err; /* 16 */
299 u32 resource_err; /* 20 */
300 u32 over_err; /* 24 */
301 u32 rcvdt_err; /* 28 */
302 u32 short_err; /* 32 */
307 /* Intermediate System Configuration Pointer - 8 bytes */
310 phys_addr pa_scb; /* 4 - va_to_pa(struct i596_scb *scb) */
313 /* System Configuration Pointer - 12 bytes */
317 phys_addr pa_iscp; /* 8 - va_to_pa(struct i596_iscp *iscp) */
320 /* Selftest and dump results - needs 16-byte alignment */
322 * The size of the dump area is 304 bytes. When the dump is executed
323 * by the Port command an extra word will be appended to the dump area.
324 * The extra word is a copy of the Dump status word (containing the
325 * C, B, OK bits). [I find 0xa006, with a0 for C+OK and 6 for dump]
328 u16 dump[153]; /* (304 = 130h) + 2 bytes */
331 struct i596_private { /* aligned to a 16-byte boundary */
332 struct i596_scp scp; /* 0 - needs 16-byte alignment */
333 struct i596_iscp iscp; /* 12 */
334 struct i596_scb scb; /* 20 */
336 struct i596_dump dump; /* 64 - needs 16-byte alignment */
338 struct i596_cmd set_add;
339 char eth_addr[8]; /* directly follows set_add */
341 struct i596_cmd set_conf;
342 char i596_config[16]; /* directly follows set_conf */
345 unsigned long tdr_stat; /* directly follows tdr */
348 struct i596_rbd *rbd_list;
349 struct i596_rbd *rbd_tail;
350 struct i596_rfd *rx_tail;
351 struct i596_cmd *cmd_tail;
352 struct i596_cmd *cmd_head;
354 unsigned long last_cmd;
355 struct net_device_stats stats;
359 static char init_setup[14] = {
360 0x8E, /* length 14 bytes, prefetch on */
361 0xC8, /* default: fifo to 8, monitor off */
362 0x40, /* default: don't save bad frames (apricot.c had 0x80) */
363 0x2E, /* (default is 0x26)
364 No source address insertion, 8 byte preamble */
365 0x00, /* default priority and backoff */
366 0x60, /* default interframe spacing */
367 0x00, /* default slot time LSB */
368 0xf2, /* default slot time and nr of retries */
369 0x00, /* default various bits
370 (0: promiscuous mode, 1: broadcast disable,
371 2: encoding mode, 3: transmit on no CRS,
372 4: no CRC insertion, 5: CRC type,
373 6: bit stuffing, 7: padding) */
374 0x00, /* default carrier sense and collision detect */
375 0x40, /* default minimum frame length */
376 0xff, /* (default is 0xff, and that is what apricot.c has;
377 elp486.c has 0xfb: Enable crc append in memory.) */
378 0x00, /* default: not full duplex */
379 0x7f /* (default is 0x3f) multi IA */
382 static int i596_open(struct net_device *dev);
383 static int i596_start_xmit(struct sk_buff *skb, struct net_device *dev);
384 static irqreturn_t i596_interrupt(int irq, void *dev_id, struct pt_regs *regs);
385 static int i596_close(struct net_device *dev);
386 static struct net_device_stats *i596_get_stats(struct net_device *dev);
387 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd);
388 static void print_eth(char *);
389 static void set_multicast_list(struct net_device *dev);
390 static void i596_tx_timeout(struct net_device *dev);
393 i596_timeout(struct net_device *dev, char *msg, int ct) {
394 struct i596_private *lp;
397 lp = (struct i596_private *) dev->priv;
398 while (lp->scb.command) {
399 if (--boguscnt == 0) {
400 printk("%s: %s timed out - stat %4.4x, cmd %4.4x\n",
402 lp->scb.status, lp->scb.command);
412 init_rx_bufs(struct net_device *dev, int num) {
413 struct i596_private *lp;
414 struct i596_rfd *rfd;
416 // struct i596_rbd *rbd;
418 lp = (struct i596_private *) dev->priv;
419 lp->scb.pa_rfd = I596_NULL;
421 for (i = 0; i < num; i++) {
422 rfd = kmalloc(sizeof(struct i596_rfd), GFP_KERNEL);
427 rfd->pa_rbd = I596_NULL;
436 rfd->pa_next = lp->scb.pa_rfd;
437 lp->scb.pa_rfd = va_to_pa(rfd);
438 lp->rx_tail->pa_next = lp->scb.pa_rfd;
442 for (i = 0; i<RX_RBD_SIZE; i++) {
443 rbd = kmalloc(sizeof(struct i596_rbd), GFP_KERNEL);
447 rbd->skb = dev_alloc_skb(RX_SKB_SIZE);
449 printk("dev_alloc_skb failed");
451 rbd->next = rfd->rbd;
453 rfd->rbd->prev = rbd;
454 rbd->size = RX_SKB_SIZE;
456 rbd->size = (RX_SKB_SIZE | RBD_EL);
462 printk("Could not kmalloc rbd\n");
465 lp->rbd_tail->next = rfd->rbd;
471 remove_rx_bufs(struct net_device *dev) {
472 struct i596_private *lp;
473 struct i596_rfd *rfd;
475 lp = (struct i596_private *) dev->priv;
476 lp->rx_tail->pa_next = I596_NULL;
479 rfd = pa_to_va(lp->scb.pa_rfd);
480 lp->scb.pa_rfd = rfd->pa_next;
482 } while (rfd != lp->rx_tail);
492 #define PORT_RESET 0x00 /* reset 82596 */
493 #define PORT_SELFTEST 0x01 /* selftest */
494 #define PORT_ALTSCP 0x02 /* alternate SCB address */
495 #define PORT_DUMP 0x03 /* dump */
497 #define IOADDR 0xcb0 /* real constant */
498 #define IRQ 10 /* default IRQ - can be changed by ECU */
500 /* The 82596 requires two 16-bit write cycles for a port command */
502 PORT(phys_addr a, unsigned int cmd) {
504 printk("lp486e.c: PORT: address not aligned\n");
505 outw(((a & 0xffff) | cmd), IOADDR);
506 outw(((a>>16) & 0xffff), IOADDR+2);
520 #define SIZE(x) (sizeof(x)/sizeof((x)[0]))
523 /* selftest or dump */
525 i596_port_do(struct net_device *dev, int portcmd, char *cmdname) {
526 struct i596_private *lp = dev->priv;
530 memset((void *)&(lp->dump), 0, sizeof(struct i596_dump));
531 outp = &(lp->dump.dump[0]);
533 PORT(va_to_pa(outp), portcmd);
534 mdelay(30); /* random, unmotivated */
536 printk("lp486e i82596 %s result:\n", cmdname);
537 for (m = SIZE(lp->dump.dump); m && lp->dump.dump[m-1] == 0; m--)
539 for (i = 0; i < m; i++) {
540 printk(" %04x", lp->dump.dump[i]);
549 i596_scp_setup(struct net_device *dev) {
550 struct i596_private *lp = dev->priv;
553 /* Setup SCP, ISCP, SCB */
556 * only a single byte is significant - here 0x44
557 * 0x80: big endian mode (details depend on stepping)
559 * 0x20: interrupt pin is active low
560 * 0x10: lock function disabled
561 * 0x08: external triggering of bus throttle timers
562 * 0x06: 00: 82586 compat mode, 01: segmented mode, 10: linear mode
565 lp->scp.sysbus = 0x00440000; /* linear mode */
566 lp->scp.pad = 0; /* must be zero */
567 lp->scp.pa_iscp = va_to_pa(&(lp->iscp));
570 * The CPU sets the ISCP to 1 before it gives the first CA()
572 lp->iscp.busy = 0x0001;
573 lp->iscp.pa_scb = va_to_pa(&(lp->scb));
577 lp->scb.pa_cmd = I596_NULL;
578 /* lp->scb.pa_rfd has been initialised already */
580 lp->last_cmd = jiffies;
586 * We need to wait 10 systemclock cycles, and
587 * 5 serial clock cycles.
589 PORT(0, PORT_RESET); /* address part ignored */
593 * Before the CA signal is asserted, the default SCP address
594 * (0x00fffff4) can be changed to a 16-byte aligned value
596 PORT(va_to_pa(&lp->scp), PORT_ALTSCP); /* change the scp address */
599 * The initialization procedure begins when a
600 * Channel Attention signal is asserted after a reset.
606 * The ISCP busy is cleared by the 82596 after the SCB address is read.
609 while (lp->iscp.busy) {
610 if (--boguscnt == 0) {
611 /* No i82596 present? */
612 printk("%s: i82596 initialization timed out\n",
619 /* I find here boguscnt==100, so no delay was required. */
625 init_i596(struct net_device *dev) {
626 struct i596_private *lp;
628 if (i596_scp_setup(dev))
631 lp = (struct i596_private *) dev->priv;
634 memcpy ((void *)lp->i596_config, init_setup, 14);
635 lp->set_conf.command = CmdConfigure;
636 i596_add_cmd(dev, (void *)&lp->set_conf);
638 memcpy ((void *)lp->eth_addr, dev->dev_addr, 6);
639 lp->set_add.command = CmdIASetup;
640 i596_add_cmd(dev, (struct i596_cmd *)&lp->set_add);
642 lp->tdr.command = CmdTDR;
643 i596_add_cmd(dev, (struct i596_cmd *)&lp->tdr);
645 if (lp->scb.command && i596_timeout(dev, "i82596 init", 200))
648 lp->scb.command = RX_START;
653 if (lp->scb.command && i596_timeout(dev, "Receive Unit start", 100))
659 /* Receive a single frame */
661 i596_rx_one(struct net_device *dev, struct i596_private *lp,
662 struct i596_rfd *rfd, int *frames) {
664 if (rfd->stat & RFD_STAT_OK) {
666 int pkt_len = (rfd->count & 0x3fff);
667 struct sk_buff *skb = dev_alloc_skb(pkt_len);
671 if (rfd->cmd & CMD_EOL)
672 printk("Received on EOL\n");
675 printk ("%s: i596_rx Memory squeeze, "
676 "dropping packet.\n", dev->name);
677 lp->stats.rx_dropped++;
682 memcpy(skb_put(skb,pkt_len), rfd->data, pkt_len);
684 skb->protocol = eth_type_trans(skb,dev);
686 dev->last_rx = jiffies;
687 lp->stats.rx_packets++;
690 printk("Frame reception error status %04x\n",
693 lp->stats.rx_errors++;
694 if (rfd->stat & RFD_COLLISION)
695 lp->stats.collisions++;
696 if (rfd->stat & RFD_SHORT_FRAME_ERR)
697 lp->stats.rx_length_errors++;
698 if (rfd->stat & RFD_DMA_ERR)
699 lp->stats.rx_over_errors++;
700 if (rfd->stat & RFD_NOBUFS_ERR)
701 lp->stats.rx_fifo_errors++;
702 if (rfd->stat & RFD_ALIGN_ERR)
703 lp->stats.rx_frame_errors++;
704 if (rfd->stat & RFD_CRC_ERR)
705 lp->stats.rx_crc_errors++;
706 if (rfd->stat & RFD_LENGTH_ERR)
707 lp->stats.rx_length_errors++;
709 rfd->stat = rfd->count = 0;
714 i596_rx(struct net_device *dev) {
715 struct i596_private *lp = (struct i596_private *) dev->priv;
716 struct i596_rfd *rfd;
720 rfd = pa_to_va(lp->scb.pa_rfd);
722 printk(KERN_ERR "i596_rx: NULL rfd?\n");
726 if (rfd->stat && !(rfd->stat & (RFD_STAT_C | RFD_STAT_B)))
727 printk("SF:%p-%04x\n", rfd, rfd->stat);
729 if (!(rfd->stat & RFD_STAT_C))
730 break; /* next one not ready */
731 if (i596_rx_one(dev, lp, rfd, &frames))
732 break; /* out of memory */
734 lp->rx_tail->cmd = 0;
736 lp->scb.pa_rfd = rfd->pa_next;
744 i596_cleanup_cmd(struct net_device *dev) {
745 struct i596_private *lp;
746 struct i596_cmd *cmd;
748 lp = (struct i596_private *) dev->priv;
749 while (lp->cmd_head) {
750 cmd = (struct i596_cmd *)lp->cmd_head;
752 lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
755 switch ((cmd->command) & 0x7) {
757 struct tx_cmd *tx_cmd = (struct tx_cmd *) cmd;
758 struct i596_tbd * tx_cmd_tbd;
759 tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
761 dev_kfree_skb_any(tx_cmd_tbd->skb);
763 lp->stats.tx_errors++;
764 lp->stats.tx_aborted_errors++;
766 cmd->pa_next = I596_NULL;
767 kfree((unsigned char *)tx_cmd);
768 netif_wake_queue(dev);
771 case CmdMulticastList: {
772 // unsigned short count = *((unsigned short *) (ptr + 1));
774 cmd->pa_next = I596_NULL;
775 kfree((unsigned char *)cmd);
779 cmd->pa_next = I596_NULL;
786 if (lp->scb.command && i596_timeout(dev, "i596_cleanup_cmd", 100))
789 lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
792 static void i596_reset(struct net_device *dev, struct i596_private *lp, int ioaddr) {
794 if (lp->scb.command && i596_timeout(dev, "i596_reset", 100))
797 netif_stop_queue(dev);
799 lp->scb.command = CUC_ABORT | RX_ABORT;
803 /* wait for shutdown */
804 if (lp->scb.command && i596_timeout(dev, "i596_reset(2)", 400))
807 i596_cleanup_cmd(dev);
810 netif_start_queue(dev);
811 /*dev_kfree_skb(skb, FREE_WRITE);*/
815 static void i596_add_cmd(struct net_device *dev, struct i596_cmd *cmd) {
816 struct i596_private *lp = dev->priv;
817 int ioaddr = dev->base_addr;
821 cmd->command |= (CMD_EOL | CMD_INTR);
822 cmd->pa_next = I596_NULL;
824 spin_lock_irqsave(&lp->cmd_lock, flags);
827 lp->cmd_tail->pa_next = va_to_pa(cmd);
830 if (lp->scb.command && i596_timeout(dev, "i596_add_cmd", 100))
832 lp->scb.pa_cmd = va_to_pa(cmd);
833 lp->scb.command = CUC_START;
839 lp->cmd_head = pa_to_va(lp->scb.pa_cmd);
840 spin_unlock_irqrestore(&lp->cmd_lock, flags);
842 if (lp->cmd_backlog > 16) {
843 int tickssofar = jiffies - lp->last_cmd;
844 if (tickssofar < HZ/4)
847 printk(KERN_WARNING "%s: command unit timed out, status resetting.\n", dev->name);
848 i596_reset(dev, lp, ioaddr);
852 static int i596_open(struct net_device *dev)
856 i = request_irq(dev->irq, &i596_interrupt, SA_SHIRQ, dev->name, dev);
858 printk(KERN_ERR "%s: IRQ %d not free\n", dev->name, dev->irq);
862 if ((i = init_rx_bufs(dev, RX_RING_SIZE)) < RX_RING_SIZE)
863 printk(KERN_ERR "%s: only able to allocate %d receive buffers\n", dev->name, i);
866 free_irq(dev->irq, dev);
869 netif_start_queue(dev);
871 return 0; /* Always succeed */
874 static int i596_start_xmit (struct sk_buff *skb, struct net_device *dev) {
875 struct i596_private *lp = dev->priv;
876 struct tx_cmd *tx_cmd;
881 if (length < ETH_ZLEN) {
882 skb = skb_padto(skb, ETH_ZLEN);
888 dev->trans_start = jiffies;
890 tx_cmd = (struct tx_cmd *) kmalloc ((sizeof (struct tx_cmd) + sizeof (struct i596_tbd)), GFP_ATOMIC);
891 if (tx_cmd == NULL) {
892 printk(KERN_WARNING "%s: i596_xmit Memory squeeze, dropping packet.\n", dev->name);
893 lp->stats.tx_dropped++;
896 struct i596_tbd *tx_cmd_tbd;
897 tx_cmd_tbd = (struct i596_tbd *) (tx_cmd + 1);
898 tx_cmd->pa_tbd = va_to_pa (tx_cmd_tbd);
899 tx_cmd_tbd->pa_next = I596_NULL;
901 tx_cmd->cmd.command = (CMD_FLEX | CmdTx);
906 tx_cmd_tbd->size = (EOF | length);
908 tx_cmd_tbd->pa_data = va_to_pa (skb->data);
909 tx_cmd_tbd->skb = skb;
911 if (i596_debug & LOG_SRCDST)
912 print_eth (skb->data);
914 i596_add_cmd (dev, (struct i596_cmd *) tx_cmd);
916 lp->stats.tx_packets++;
923 i596_tx_timeout (struct net_device *dev) {
924 struct i596_private *lp = dev->priv;
925 int ioaddr = dev->base_addr;
927 /* Transmitter timeout, serious problems. */
928 printk(KERN_WARNING "%s: transmit timed out, status resetting.\n", dev->name);
929 lp->stats.tx_errors++;
931 /* Try to restart the adaptor */
932 if (lp->last_restart == lp->stats.tx_packets) {
933 printk ("Resetting board.\n");
935 /* Shutdown and restart */
936 i596_reset (dev, lp, ioaddr);
938 /* Issue a channel attention signal */
939 printk ("Kicking board.\n");
940 lp->scb.command = (CUC_START | RX_START);
942 lp->last_restart = lp->stats.tx_packets;
944 netif_wake_queue(dev);
947 static void print_eth(char *add)
952 for (i = 0; i < 6; i++)
953 printk(" %2.2X", (unsigned char) add[i]);
957 for (i = 0; i < 6; i++)
958 printk(" %2.2X", (unsigned char) add[i+6]);
961 printk ("type %2.2X%2.2X\n",
962 (unsigned char) add[12], (unsigned char) add[13]);
965 static int __init lp486e_probe(struct net_device *dev) {
966 struct i596_private *lp;
967 unsigned char eth_addr[6] = { 0, 0xaa, 0, 0, 0, 0 };
977 if (!request_region(IOADDR, LP486E_TOTAL_SIZE, DRV_NAME)) {
978 printk(KERN_ERR "lp486e: IO address 0x%x in use\n", IOADDR);
982 lp = (struct i596_private *) dev->priv;
983 spin_lock_init(&lp->cmd_lock);
986 * Do we really have this thing?
988 if (i596_scp_setup(dev)) {
993 dev->base_addr = IOADDR;
998 * How do we find the ethernet address? I don't know.
999 * One possibility is to look at the EISA configuration area
1000 * [0xe8000-0xe9fff]. This contains the ethernet address
1001 * but not at a fixed address - things depend on setup options.
1003 * If we find no address, or the wrong address, use
1004 * ifconfig eth0 hw ether a1:a2:a3:a4:a5:a6
1005 * with the value found in the BIOS setup.
1007 bios = bus_to_virt(0xe8000);
1008 for (j = 0; j < 0x2000; j++) {
1009 if (bios[j] == 0 && bios[j+1] == 0xaa && bios[j+2] == 0) {
1010 printk("%s: maybe address at BIOS 0x%x:",
1011 dev->name, 0xe8000+j);
1012 for (i = 0; i < 6; i++) {
1013 eth_addr[i] = bios[i+j];
1014 printk(" %2.2X", eth_addr[i]);
1020 printk("%s: lp486e 82596 at %#3lx, IRQ %d,",
1021 dev->name, dev->base_addr, dev->irq);
1022 for (i = 0; i < 6; i++)
1023 printk(" %2.2X", dev->dev_addr[i] = eth_addr[i]);
1026 /* The LP486E-specific entries in the device structure. */
1027 dev->open = &i596_open;
1028 dev->stop = &i596_close;
1029 dev->hard_start_xmit = &i596_start_xmit;
1030 dev->get_stats = &i596_get_stats;
1031 dev->set_multicast_list = &set_multicast_list;
1032 dev->watchdog_timeo = 5*HZ;
1033 dev->tx_timeout = i596_tx_timeout;
1036 /* selftest reports 0x320925ae - don't know what that means */
1037 i596_port_do(dev, PORT_SELFTEST, "selftest");
1038 i596_port_do(dev, PORT_DUMP, "dump");
1043 release_region(IOADDR, LP486E_TOTAL_SIZE);
1048 i596_handle_CU_completion(struct net_device *dev,
1049 struct i596_private *lp,
1050 unsigned short status,
1051 unsigned short *ack_cmdp) {
1052 struct i596_cmd *cmd;
1054 int commands_done = 0;
1056 unsigned long flags;
1058 spin_lock_irqsave(&lp->cmd_lock, flags);
1061 while (lp->cmd_head && (lp->cmd_head->status & CMD_STAT_C)) {
1064 lp->cmd_head = pa_to_va(lp->cmd_head->pa_next);
1068 cmd_val = cmd->command & 0x7;
1070 printk("finished CU %s command (%d)\n",
1071 CUcmdnames[cmd_val], cmd_val);
1076 struct tx_cmd *tx_cmd;
1077 struct i596_tbd *tx_cmd_tbd;
1079 tx_cmd = (struct tx_cmd *) cmd;
1080 tx_cmd_tbd = pa_to_va(tx_cmd->pa_tbd);
1083 if (cmd->status & CMD_STAT_OK) {
1085 print_eth(pa_to_va(tx_cmd_tbd->pa_data));
1087 lp->stats.tx_errors++;
1089 printk("transmission failure:%04x\n",
1091 if (cmd->status & 0x0020)
1092 lp->stats.collisions++;
1093 if (!(cmd->status & 0x0040))
1094 lp->stats.tx_heartbeat_errors++;
1095 if (cmd->status & 0x0400)
1096 lp->stats.tx_carrier_errors++;
1097 if (cmd->status & 0x0800)
1098 lp->stats.collisions++;
1099 if (cmd->status & 0x1000)
1100 lp->stats.tx_aborted_errors++;
1102 dev_kfree_skb_irq(tx_cmd_tbd->skb);
1104 cmd->pa_next = I596_NULL;
1105 kfree((unsigned char *)tx_cmd);
1106 netif_wake_queue(dev);
1110 case CmdMulticastList:
1111 cmd->pa_next = I596_NULL;
1112 kfree((unsigned char *)cmd);
1117 unsigned long status = *((unsigned long *) (cmd + 1));
1118 if (status & 0x8000) {
1120 printk("%s: link ok.\n", dev->name);
1122 if (status & 0x4000)
1123 printk("%s: Transceiver problem.\n",
1125 if (status & 0x2000)
1126 printk("%s: Termination problem.\n",
1128 if (status & 0x1000)
1129 printk("%s: Short circuit.\n",
1131 printk("%s: Time %ld.\n",
1132 dev->name, status & 0x07ff);
1136 cmd->pa_next = I596_NULL;
1137 lp->last_cmd = jiffies;
1144 while (cmd && (cmd != lp->cmd_tail)) {
1145 cmd->command &= 0x1fff;
1146 cmd = pa_to_va(cmd->pa_next);
1151 *ack_cmdp |= CUC_START;
1152 lp->scb.pa_cmd = va_to_pa(lp->cmd_head);
1153 spin_unlock_irqrestore(&lp->cmd_lock, flags);
1157 i596_interrupt (int irq, void *dev_instance, struct pt_regs *regs) {
1158 struct net_device *dev = (struct net_device *) dev_instance;
1159 struct i596_private *lp;
1160 unsigned short status, ack_cmd = 0;
1163 lp = (struct i596_private *) dev->priv;
1166 * The 82596 examines the command, performs the required action,
1167 * and then clears the SCB command word.
1169 if (lp->scb.command && i596_timeout(dev, "interrupt", 40))
1173 * The status word indicates the status of the 82596.
1174 * It is modified only by the 82596.
1176 * [So, we must not clear it. I find often status 0xffff,
1177 * which is not one of the values allowed by the docs.]
1179 status = lp->scb.status;
1182 printk("%s: i596 interrupt, ", dev->name);
1183 i596_out_status(status);
1186 /* Impossible, but it happens - perhaps when we get
1187 a receive interrupt but scb.pa_rfd is I596_NULL. */
1188 if (status == 0xffff) {
1189 printk("%s: i596_interrupt: got status 0xffff\n", dev->name);
1193 ack_cmd = (status & STAT_ACK);
1195 if (status & (STAT_CX | STAT_CNA))
1196 i596_handle_CU_completion(dev, lp, status, &ack_cmd);
1198 if (status & (STAT_FR | STAT_RNR)) {
1199 /* Restart the receive unit when it got inactive somehow */
1200 if ((status & STAT_RNR) && netif_running(dev))
1201 ack_cmd |= RX_START;
1203 if (status & STAT_FR) {
1204 frames_in = i596_rx(dev);
1206 printk("receive frame reported, but no frames\n");
1210 /* acknowledge the interrupt */
1212 if ((lp->scb.pa_cmd != I596_NULL) && netif_running(dev))
1213 ack_cmd |= CUC_START;
1216 if (lp->scb.command && i596_timeout(dev, "i596 interrupt", 100))
1219 lp->scb.command = ack_cmd;
1228 static int i596_close(struct net_device *dev) {
1229 struct i596_private *lp = dev->priv;
1231 netif_stop_queue(dev);
1234 printk("%s: Shutting down ethercard, status was %4.4x.\n",
1235 dev->name, lp->scb.status);
1237 lp->scb.command = (CUC_ABORT | RX_ABORT);
1240 i596_cleanup_cmd(dev);
1242 if (lp->scb.command && i596_timeout(dev, "i596_close", 200))
1245 free_irq(dev->irq, dev);
1246 remove_rx_bufs(dev);
1251 static struct net_device_stats * i596_get_stats(struct net_device *dev) {
1252 struct i596_private *lp = dev->priv;
1258 * Set or clear the multicast filter for this adaptor.
1261 static void set_multicast_list(struct net_device *dev) {
1262 struct i596_private *lp = dev->priv;
1263 struct i596_cmd *cmd;
1266 printk ("%s: set multicast list %d\n",
1267 dev->name, dev->mc_count);
1269 if (dev->mc_count > 0) {
1270 struct dev_mc_list *dmi;
1272 cmd = (struct i596_cmd *)kmalloc(sizeof(struct i596_cmd)+2+dev->mc_count*6, GFP_ATOMIC);
1274 printk (KERN_ERR "%s: set_multicast Memory squeeze.\n", dev->name);
1277 cmd->command = CmdMulticastList;
1278 *((unsigned short *) (cmd + 1)) = dev->mc_count * 6;
1279 cp = ((char *)(cmd + 1))+2;
1280 for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) {
1284 if (i596_debug & LOG_SRCDST)
1285 print_eth (((char *)(cmd + 1)) + 2);
1286 i596_add_cmd(dev, cmd);
1288 if (lp->set_conf.pa_next != I596_NULL) {
1291 if (dev->mc_count == 0 && !(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
1292 if (dev->flags & IFF_ALLMULTI)
1293 dev->flags |= IFF_PROMISC;
1294 lp->i596_config[8] &= ~0x01;
1296 lp->i596_config[8] |= 0x01;
1299 i596_add_cmd(dev, (struct i596_cmd *) &lp->set_conf);
1303 MODULE_AUTHOR("Ard van Breemen <ard@cstmel.nl.eu.org>");
1304 MODULE_DESCRIPTION("Intel Panther onboard i82596 driver");
1305 MODULE_LICENSE("GPL");
1307 static struct net_device *dev_lp486e;
1308 static int full_duplex;
1310 static int io = IOADDR;
1311 static int irq = IRQ;
1313 module_param(debug, int, 0);
1314 //module_param(max_interrupt_work, int, 0);
1315 //module_param(reverse_probe, int, 0);
1316 //module_param(rx_copybreak, int, 0);
1317 module_param(options, int, 0);
1318 module_param(full_duplex, int, 0);
1320 static int __init lp486e_init_module(void) {
1322 struct net_device *dev = alloc_etherdev(sizeof(struct i596_private));
1327 dev->base_addr = io;
1328 err = lp486e_probe(dev);
1333 err = register_netdev(dev);
1335 release_region(dev->base_addr, LP486E_TOTAL_SIZE);
1345 static void __exit lp486e_cleanup_module(void) {
1346 unregister_netdev(dev_lp486e);
1347 release_region(dev_lp486e->base_addr, LP486E_TOTAL_SIZE);
1348 free_netdev(dev_lp486e);
1351 module_init(lp486e_init_module);
1352 module_exit(lp486e_cleanup_module);