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 #include <linux/module.h>
60 #include <linux/init.h>
61 #include <linux/delay.h>
62 #include <linux/kernel.h>
63 #include <linux/string.h>
64 #include <linux/errno.h>
65 #include <linux/ioport.h>
66 #include <linux/slab.h>
67 #include <linux/interrupt.h>
68 #include <linux/netdevice.h>
69 #include <linux/etherdevice.h>
70 #include <linux/skbuff.h>
71 #include <linux/bitops.h>
76 #define DRV_NAME "lp486e"
78 /* debug print flags */
79 #define LOG_SRCDST 0x80000000
80 #define LOG_STATINT 0x40000000
81 #define LOG_STARTINT 0x20000000
83 #define i596_debug debug
85 static int i596_debug
= 0;
87 static const char * const medianame
[] = {
89 "10baseT-FD", "AUI-FD",
92 #define LP486E_TOTAL_SIZE 16
94 #define I596_NULL (0xffffffff)
96 #define CMD_EOL 0x8000 /* The last command of the list, stop. */
97 #define CMD_SUSP 0x4000 /* Suspend after doing cmd. */
98 #define CMD_INTR 0x2000 /* Interrupt after doing cmd. */
100 #define CMD_FLEX 0x0008 /* Enable flexible memory model */
106 CmdMulticastList
= 3,
114 static const char *CUcmdnames
[8] = { "NOP", "IASetup", "Configure", "MulticastList",
115 "Tx", "TDR", "Dump", "Diagnose" };
118 /* Status word bits */
119 #define STAT_CX 0x8000 /* The CU finished executing a command
120 with the Interrupt bit set */
121 #define STAT_FR 0x4000 /* The RU finished receiving a frame */
122 #define STAT_CNA 0x2000 /* The CU left the active state */
123 #define STAT_RNR 0x1000 /* The RU left the active state */
124 #define STAT_ACK (STAT_CX | STAT_FR | STAT_CNA | STAT_RNR)
125 #define STAT_CUS 0x0700 /* Status of CU: 0: idle, 1: suspended,
126 2: active, 3-7: unused */
127 #define STAT_RUS 0x00f0 /* Status of RU: 0: idle, 1: suspended,
128 2: no resources, 4: ready,
129 10: no resources due to no more RBDs,
130 12: no more RBDs, other: unused */
131 #define STAT_T 0x0008 /* Bus throttle timers loaded */
132 #define STAT_ZERO 0x0807 /* Always zero */
135 static char *CUstates
[8] = {
136 "idle", "suspended", "active", 0, 0, 0, 0, 0
138 static char *RUstates
[16] = {
139 "idle", "suspended", "no resources", 0, "ready", 0, 0, 0,
140 0, 0, "no RBDs", 0, "out of RBDs", 0, 0, 0
144 i596_out_status(int status
) {
148 printk("status %4.4x:", status
);
149 if (status
== 0xffff)
150 printk(" strange..\n");
152 if (status
& STAT_CX
)
154 if (status
& STAT_CNA
)
155 printk(" CU stopped");
156 if (status
& STAT_FR
)
157 printk(" got a frame");
158 if (status
& STAT_RNR
)
159 printk(" RU stopped");
161 printk(" throttled");
162 if (status
& STAT_ZERO
)
164 s
= CUstates
[(status
& STAT_CUS
) >> 8];
168 printk(" CU(%s)", s
);
169 s
= RUstates
[(status
& STAT_RUS
) >> 4];
173 printk(" RU(%s)", s
);
175 printk(" bad status");
181 /* Command word bits */
182 #define ACK_CX 0x8000
183 #define ACK_FR 0x4000
184 #define ACK_CNA 0x2000
185 #define ACK_RNR 0x1000
187 #define CUC_START 0x0100
188 #define CUC_RESUME 0x0200
189 #define CUC_SUSPEND 0x0300
190 #define CUC_ABORT 0x0400
192 #define RX_START 0x0010
193 #define RX_RESUME 0x0020
194 #define RX_SUSPEND 0x0030
195 #define RX_ABORT 0x0040
197 typedef u32 phys_addr
;
199 static inline phys_addr
201 return x
? virt_to_bus(x
) : I596_NULL
;
205 pa_to_va(phys_addr x
) {
206 return (x
== I596_NULL
) ? NULL
: bus_to_virt(x
);
209 /* status bits for cmd */
210 #define CMD_STAT_C 0x8000 /* CU command complete */
211 #define CMD_STAT_B 0x4000 /* CU command in progress */
212 #define CMD_STAT_OK 0x2000 /* CU command completed without errors */
213 #define CMD_STAT_A 0x1000 /* CU command abnormally terminated */
215 struct i596_cmd
{ /* 8 bytes */
216 unsigned short status
;
217 unsigned short command
;
218 phys_addr pa_next
; /* va_to_pa(struct i596_cmd *next) */
222 #define SIZE_MASK 0x3fff
227 phys_addr pa_next
; /* va_to_pa(struct i596_tbd *next) */
228 phys_addr pa_data
; /* va_to_pa(char *data) */
234 phys_addr pa_tbd
; /* va_to_pa(struct i596_tbd *tbd) */
239 /* status bits for rfd */
240 #define RFD_STAT_C 0x8000 /* Frame reception complete */
241 #define RFD_STAT_B 0x4000 /* Frame reception in progress */
242 #define RFD_STAT_OK 0x2000 /* Frame received without errors */
243 #define RFD_STATUS 0x1fff
244 #define RFD_LENGTH_ERR 0x1000
245 #define RFD_CRC_ERR 0x0800
246 #define RFD_ALIGN_ERR 0x0400
247 #define RFD_NOBUFS_ERR 0x0200
248 #define RFD_DMA_ERR 0x0100 /* DMA overrun failure to acquire system bus */
249 #define RFD_SHORT_FRAME_ERR 0x0080
250 #define RFD_NOEOP_ERR 0x0040
251 #define RFD_TRUNC_ERR 0x0020
252 #define RFD_MULTICAST 0x0002 /* 0: destination had our address
253 1: destination was broadcast/multicast */
254 #define RFD_COLLISION 0x0001
256 /* receive frame descriptor */
260 phys_addr pa_next
; /* va_to_pa(struct i596_rfd *next) */
261 phys_addr pa_rbd
; /* va_to_pa(struct i596_rbd *rbd) */
262 unsigned short count
;
267 #define RBD_EL 0x8000
269 #define RBD_SIZEMASK 0x3fff
270 #define RBD_EOF 0x8000
273 /* receive buffer descriptor */
277 phys_addr pa_next
; /* va_to_pa(struct i596_tbd *next) */
278 phys_addr pa_data
; /* va_to_pa(char *data) */
279 phys_addr pa_prev
; /* va_to_pa(struct i596_tbd *prev) */
281 /* Driver private part */
285 #define RX_RING_SIZE 64
286 #define RX_SKBSIZE (ETH_FRAME_LEN+10)
287 #define RX_RBD_SIZE 32
289 /* System Control Block - 40 bytes */
293 phys_addr pa_cmd
; /* 4 - va_to_pa(struct i596_cmd *cmd) */
294 phys_addr pa_rfd
; /* 8 - va_to_pa(struct i596_rfd *rfd) */
295 u32 crc_err
; /* 12 */
296 u32 align_err
; /* 16 */
297 u32 resource_err
; /* 20 */
298 u32 over_err
; /* 24 */
299 u32 rcvdt_err
; /* 28 */
300 u32 short_err
; /* 32 */
305 /* Intermediate System Configuration Pointer - 8 bytes */
308 phys_addr pa_scb
; /* 4 - va_to_pa(struct i596_scb *scb) */
311 /* System Configuration Pointer - 12 bytes */
315 phys_addr pa_iscp
; /* 8 - va_to_pa(struct i596_iscp *iscp) */
318 /* Selftest and dump results - needs 16-byte alignment */
320 * The size of the dump area is 304 bytes. When the dump is executed
321 * by the Port command an extra word will be appended to the dump area.
322 * The extra word is a copy of the Dump status word (containing the
323 * C, B, OK bits). [I find 0xa006, with a0 for C+OK and 6 for dump]
326 u16 dump
[153]; /* (304 = 130h) + 2 bytes */
329 struct i596_private
{ /* aligned to a 16-byte boundary */
330 struct i596_scp scp
; /* 0 - needs 16-byte alignment */
331 struct i596_iscp iscp
; /* 12 */
332 struct i596_scb scb
; /* 20 */
334 struct i596_dump dump
; /* 64 - needs 16-byte alignment */
336 struct i596_cmd set_add
;
337 char eth_addr
[8]; /* directly follows set_add */
339 struct i596_cmd set_conf
;
340 char i596_config
[16]; /* directly follows set_conf */
343 unsigned long tdr_stat
; /* directly follows tdr */
346 struct i596_rbd
*rbd_list
;
347 struct i596_rbd
*rbd_tail
;
348 struct i596_rfd
*rx_tail
;
349 struct i596_cmd
*cmd_tail
;
350 struct i596_cmd
*cmd_head
;
352 unsigned long last_cmd
;
356 static char init_setup
[14] = {
357 0x8E, /* length 14 bytes, prefetch on */
358 0xC8, /* default: fifo to 8, monitor off */
359 0x40, /* default: don't save bad frames (apricot.c had 0x80) */
360 0x2E, /* (default is 0x26)
361 No source address insertion, 8 byte preamble */
362 0x00, /* default priority and backoff */
363 0x60, /* default interframe spacing */
364 0x00, /* default slot time LSB */
365 0xf2, /* default slot time and nr of retries */
366 0x00, /* default various bits
367 (0: promiscuous mode, 1: broadcast disable,
368 2: encoding mode, 3: transmit on no CRS,
369 4: no CRC insertion, 5: CRC type,
370 6: bit stuffing, 7: padding) */
371 0x00, /* default carrier sense and collision detect */
372 0x40, /* default minimum frame length */
373 0xff, /* (default is 0xff, and that is what apricot.c has;
374 elp486.c has 0xfb: Enable crc append in memory.) */
375 0x00, /* default: not full duplex */
376 0x7f /* (default is 0x3f) multi IA */
379 static int i596_open(struct net_device
*dev
);
380 static int i596_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
381 static irqreturn_t
i596_interrupt(int irq
, void *dev_id
);
382 static int i596_close(struct net_device
*dev
);
383 static void i596_add_cmd(struct net_device
*dev
, struct i596_cmd
*cmd
);
384 static void print_eth(char *);
385 static void set_multicast_list(struct net_device
*dev
);
386 static void i596_tx_timeout(struct net_device
*dev
);
389 i596_timeout(struct net_device
*dev
, char *msg
, int ct
) {
390 struct i596_private
*lp
;
393 lp
= netdev_priv(dev
);
394 while (lp
->scb
.command
) {
395 if (--boguscnt
== 0) {
396 printk("%s: %s timed out - stat %4.4x, cmd %4.4x\n",
398 lp
->scb
.status
, lp
->scb
.command
);
408 init_rx_bufs(struct net_device
*dev
, int num
) {
409 struct i596_private
*lp
;
410 struct i596_rfd
*rfd
;
412 // struct i596_rbd *rbd;
414 lp
= netdev_priv(dev
);
415 lp
->scb
.pa_rfd
= I596_NULL
;
417 for (i
= 0; i
< num
; i
++) {
418 rfd
= kmalloc(sizeof(struct i596_rfd
), GFP_KERNEL
);
423 rfd
->pa_rbd
= I596_NULL
;
432 rfd
->pa_next
= lp
->scb
.pa_rfd
;
433 lp
->scb
.pa_rfd
= va_to_pa(rfd
);
434 lp
->rx_tail
->pa_next
= lp
->scb
.pa_rfd
;
438 for (i
= 0; i
<RX_RBD_SIZE
; i
++) {
439 rbd
= kmalloc(sizeof(struct i596_rbd
), GFP_KERNEL
);
443 rbd
->skb
= dev_alloc_skb(RX_SKBSIZE
);
445 printk("dev_alloc_skb failed");
447 rbd
->next
= rfd
->rbd
;
449 rfd
->rbd
->prev
= rbd
;
450 rbd
->size
= RX_SKBSIZE
;
452 rbd
->size
= (RX_SKBSIZE
| RBD_EL
);
458 printk("Could not kmalloc rbd\n");
461 lp
->rbd_tail
->next
= rfd
->rbd
;
467 remove_rx_bufs(struct net_device
*dev
) {
468 struct i596_private
*lp
;
469 struct i596_rfd
*rfd
;
471 lp
= netdev_priv(dev
);
472 lp
->rx_tail
->pa_next
= I596_NULL
;
475 rfd
= pa_to_va(lp
->scb
.pa_rfd
);
476 lp
->scb
.pa_rfd
= rfd
->pa_next
;
478 } while (rfd
!= lp
->rx_tail
);
488 #define PORT_RESET 0x00 /* reset 82596 */
489 #define PORT_SELFTEST 0x01 /* selftest */
490 #define PORT_ALTSCP 0x02 /* alternate SCB address */
491 #define PORT_DUMP 0x03 /* dump */
493 #define IOADDR 0xcb0 /* real constant */
494 #define IRQ 10 /* default IRQ - can be changed by ECU */
496 /* The 82596 requires two 16-bit write cycles for a port command */
498 PORT(phys_addr a
, unsigned int cmd
) {
500 printk("lp486e.c: PORT: address not aligned\n");
501 outw(((a
& 0xffff) | cmd
), IOADDR
);
502 outw(((a
>>16) & 0xffff), IOADDR
+2);
517 /* selftest or dump */
519 i596_port_do(struct net_device
*dev
, int portcmd
, char *cmdname
) {
520 struct i596_private
*lp
= netdev_priv(dev
);
524 memset((void *)&(lp
->dump
), 0, sizeof(struct i596_dump
));
525 outp
= &(lp
->dump
.dump
[0]);
527 PORT(va_to_pa(outp
), portcmd
);
528 mdelay(30); /* random, unmotivated */
530 printk("lp486e i82596 %s result:\n", cmdname
);
531 for (m
= ARRAY_SIZE(lp
->dump
.dump
); m
&& lp
->dump
.dump
[m
-1] == 0; m
--)
533 for (i
= 0; i
< m
; i
++) {
534 printk(" %04x", lp
->dump
.dump
[i
]);
543 i596_scp_setup(struct net_device
*dev
) {
544 struct i596_private
*lp
= netdev_priv(dev
);
547 /* Setup SCP, ISCP, SCB */
550 * only a single byte is significant - here 0x44
551 * 0x80: big endian mode (details depend on stepping)
553 * 0x20: interrupt pin is active low
554 * 0x10: lock function disabled
555 * 0x08: external triggering of bus throttle timers
556 * 0x06: 00: 82586 compat mode, 01: segmented mode, 10: linear mode
559 lp
->scp
.sysbus
= 0x00440000; /* linear mode */
560 lp
->scp
.pad
= 0; /* must be zero */
561 lp
->scp
.pa_iscp
= va_to_pa(&(lp
->iscp
));
564 * The CPU sets the ISCP to 1 before it gives the first CA()
566 lp
->iscp
.busy
= 0x0001;
567 lp
->iscp
.pa_scb
= va_to_pa(&(lp
->scb
));
571 lp
->scb
.pa_cmd
= I596_NULL
;
572 /* lp->scb.pa_rfd has been initialised already */
574 lp
->last_cmd
= jiffies
;
580 * We need to wait 10 systemclock cycles, and
581 * 5 serial clock cycles.
583 PORT(0, PORT_RESET
); /* address part ignored */
587 * Before the CA signal is asserted, the default SCP address
588 * (0x00fffff4) can be changed to a 16-byte aligned value
590 PORT(va_to_pa(&lp
->scp
), PORT_ALTSCP
); /* change the scp address */
593 * The initialization procedure begins when a
594 * Channel Attention signal is asserted after a reset.
600 * The ISCP busy is cleared by the 82596 after the SCB address is read.
603 while (lp
->iscp
.busy
) {
604 if (--boguscnt
== 0) {
605 /* No i82596 present? */
606 printk("%s: i82596 initialization timed out\n",
613 /* I find here boguscnt==100, so no delay was required. */
619 init_i596(struct net_device
*dev
) {
620 struct i596_private
*lp
;
622 if (i596_scp_setup(dev
))
625 lp
= netdev_priv(dev
);
628 memcpy ((void *)lp
->i596_config
, init_setup
, 14);
629 lp
->set_conf
.command
= CmdConfigure
;
630 i596_add_cmd(dev
, (void *)&lp
->set_conf
);
632 memcpy ((void *)lp
->eth_addr
, dev
->dev_addr
, 6);
633 lp
->set_add
.command
= CmdIASetup
;
634 i596_add_cmd(dev
, (struct i596_cmd
*)&lp
->set_add
);
636 lp
->tdr
.command
= CmdTDR
;
637 i596_add_cmd(dev
, (struct i596_cmd
*)&lp
->tdr
);
639 if (lp
->scb
.command
&& i596_timeout(dev
, "i82596 init", 200))
642 lp
->scb
.command
= RX_START
;
647 if (lp
->scb
.command
&& i596_timeout(dev
, "Receive Unit start", 100))
653 /* Receive a single frame */
655 i596_rx_one(struct net_device
*dev
, struct i596_private
*lp
,
656 struct i596_rfd
*rfd
, int *frames
) {
658 if (rfd
->stat
& RFD_STAT_OK
) {
660 int pkt_len
= (rfd
->count
& 0x3fff);
661 struct sk_buff
*skb
= dev_alloc_skb(pkt_len
);
665 if (rfd
->cmd
& CMD_EOL
)
666 printk("Received on EOL\n");
669 printk ("%s: i596_rx Memory squeeze, "
670 "dropping packet.\n", dev
->name
);
671 dev
->stats
.rx_dropped
++;
675 memcpy(skb_put(skb
,pkt_len
), rfd
->data
, pkt_len
);
677 skb
->protocol
= eth_type_trans(skb
,dev
);
679 dev
->stats
.rx_packets
++;
682 printk("Frame reception error status %04x\n",
685 dev
->stats
.rx_errors
++;
686 if (rfd
->stat
& RFD_COLLISION
)
687 dev
->stats
.collisions
++;
688 if (rfd
->stat
& RFD_SHORT_FRAME_ERR
)
689 dev
->stats
.rx_length_errors
++;
690 if (rfd
->stat
& RFD_DMA_ERR
)
691 dev
->stats
.rx_over_errors
++;
692 if (rfd
->stat
& RFD_NOBUFS_ERR
)
693 dev
->stats
.rx_fifo_errors
++;
694 if (rfd
->stat
& RFD_ALIGN_ERR
)
695 dev
->stats
.rx_frame_errors
++;
696 if (rfd
->stat
& RFD_CRC_ERR
)
697 dev
->stats
.rx_crc_errors
++;
698 if (rfd
->stat
& RFD_LENGTH_ERR
)
699 dev
->stats
.rx_length_errors
++;
701 rfd
->stat
= rfd
->count
= 0;
706 i596_rx(struct net_device
*dev
) {
707 struct i596_private
*lp
= netdev_priv(dev
);
708 struct i596_rfd
*rfd
;
712 rfd
= pa_to_va(lp
->scb
.pa_rfd
);
714 printk(KERN_ERR
"i596_rx: NULL rfd?\n");
718 if (rfd
->stat
&& !(rfd
->stat
& (RFD_STAT_C
| RFD_STAT_B
)))
719 printk("SF:%p-%04x\n", rfd
, rfd
->stat
);
721 if (!(rfd
->stat
& RFD_STAT_C
))
722 break; /* next one not ready */
723 if (i596_rx_one(dev
, lp
, rfd
, &frames
))
724 break; /* out of memory */
726 lp
->rx_tail
->cmd
= 0;
728 lp
->scb
.pa_rfd
= rfd
->pa_next
;
736 i596_cleanup_cmd(struct net_device
*dev
) {
737 struct i596_private
*lp
;
738 struct i596_cmd
*cmd
;
740 lp
= netdev_priv(dev
);
741 while (lp
->cmd_head
) {
742 cmd
= (struct i596_cmd
*)lp
->cmd_head
;
744 lp
->cmd_head
= pa_to_va(lp
->cmd_head
->pa_next
);
747 switch ((cmd
->command
) & 0x7) {
749 struct tx_cmd
*tx_cmd
= (struct tx_cmd
*) cmd
;
750 struct i596_tbd
* tx_cmd_tbd
;
751 tx_cmd_tbd
= pa_to_va(tx_cmd
->pa_tbd
);
753 dev_kfree_skb_any(tx_cmd_tbd
->skb
);
755 dev
->stats
.tx_errors
++;
756 dev
->stats
.tx_aborted_errors
++;
758 cmd
->pa_next
= I596_NULL
;
759 kfree((unsigned char *)tx_cmd
);
760 netif_wake_queue(dev
);
763 case CmdMulticastList
: {
764 // unsigned short count = *((unsigned short *) (ptr + 1));
766 cmd
->pa_next
= I596_NULL
;
767 kfree((unsigned char *)cmd
);
771 cmd
->pa_next
= I596_NULL
;
778 if (lp
->scb
.command
&& i596_timeout(dev
, "i596_cleanup_cmd", 100))
781 lp
->scb
.pa_cmd
= va_to_pa(lp
->cmd_head
);
784 static void i596_reset(struct net_device
*dev
, struct i596_private
*lp
, int ioaddr
) {
786 if (lp
->scb
.command
&& i596_timeout(dev
, "i596_reset", 100))
789 netif_stop_queue(dev
);
791 lp
->scb
.command
= CUC_ABORT
| RX_ABORT
;
795 /* wait for shutdown */
796 if (lp
->scb
.command
&& i596_timeout(dev
, "i596_reset(2)", 400))
799 i596_cleanup_cmd(dev
);
802 netif_start_queue(dev
);
803 /*dev_kfree_skb(skb, FREE_WRITE);*/
807 static void i596_add_cmd(struct net_device
*dev
, struct i596_cmd
*cmd
) {
808 struct i596_private
*lp
= netdev_priv(dev
);
809 int ioaddr
= dev
->base_addr
;
813 cmd
->command
|= (CMD_EOL
| CMD_INTR
);
814 cmd
->pa_next
= I596_NULL
;
816 spin_lock_irqsave(&lp
->cmd_lock
, flags
);
819 lp
->cmd_tail
->pa_next
= va_to_pa(cmd
);
822 if (lp
->scb
.command
&& i596_timeout(dev
, "i596_add_cmd", 100))
824 lp
->scb
.pa_cmd
= va_to_pa(cmd
);
825 lp
->scb
.command
= CUC_START
;
831 lp
->cmd_head
= pa_to_va(lp
->scb
.pa_cmd
);
832 spin_unlock_irqrestore(&lp
->cmd_lock
, flags
);
834 if (lp
->cmd_backlog
> 16) {
835 int tickssofar
= jiffies
- lp
->last_cmd
;
836 if (tickssofar
< HZ
/4)
839 printk(KERN_WARNING
"%s: command unit timed out, status resetting.\n", dev
->name
);
840 i596_reset(dev
, lp
, ioaddr
);
844 static int i596_open(struct net_device
*dev
)
848 i
= request_irq(dev
->irq
, &i596_interrupt
, IRQF_SHARED
, dev
->name
, dev
);
850 printk(KERN_ERR
"%s: IRQ %d not free\n", dev
->name
, dev
->irq
);
854 if ((i
= init_rx_bufs(dev
, RX_RING_SIZE
)) < RX_RING_SIZE
)
855 printk(KERN_ERR
"%s: only able to allocate %d receive buffers\n", dev
->name
, i
);
858 free_irq(dev
->irq
, dev
);
861 netif_start_queue(dev
);
863 return 0; /* Always succeed */
866 static int i596_start_xmit (struct sk_buff
*skb
, struct net_device
*dev
) {
867 struct tx_cmd
*tx_cmd
;
872 if (length
< ETH_ZLEN
) {
873 if (skb_padto(skb
, ETH_ZLEN
))
878 dev
->trans_start
= jiffies
;
880 tx_cmd
= kmalloc((sizeof (struct tx_cmd
) + sizeof (struct i596_tbd
)), GFP_ATOMIC
);
881 if (tx_cmd
== NULL
) {
882 printk(KERN_WARNING
"%s: i596_xmit Memory squeeze, dropping packet.\n", dev
->name
);
883 dev
->stats
.tx_dropped
++;
886 struct i596_tbd
*tx_cmd_tbd
;
887 tx_cmd_tbd
= (struct i596_tbd
*) (tx_cmd
+ 1);
888 tx_cmd
->pa_tbd
= va_to_pa (tx_cmd_tbd
);
889 tx_cmd_tbd
->pa_next
= I596_NULL
;
891 tx_cmd
->cmd
.command
= (CMD_FLEX
| CmdTx
);
896 tx_cmd_tbd
->size
= (EOF
| length
);
898 tx_cmd_tbd
->pa_data
= va_to_pa (skb
->data
);
899 tx_cmd_tbd
->skb
= skb
;
901 if (i596_debug
& LOG_SRCDST
)
902 print_eth (skb
->data
);
904 i596_add_cmd (dev
, (struct i596_cmd
*) tx_cmd
);
906 dev
->stats
.tx_packets
++;
913 i596_tx_timeout (struct net_device
*dev
) {
914 struct i596_private
*lp
= netdev_priv(dev
);
915 int ioaddr
= dev
->base_addr
;
917 /* Transmitter timeout, serious problems. */
918 printk(KERN_WARNING
"%s: transmit timed out, status resetting.\n", dev
->name
);
919 dev
->stats
.tx_errors
++;
921 /* Try to restart the adaptor */
922 if (lp
->last_restart
== dev
->stats
.tx_packets
) {
923 printk ("Resetting board.\n");
925 /* Shutdown and restart */
926 i596_reset (dev
, lp
, ioaddr
);
928 /* Issue a channel attention signal */
929 printk ("Kicking board.\n");
930 lp
->scb
.command
= (CUC_START
| RX_START
);
932 lp
->last_restart
= dev
->stats
.tx_packets
;
934 netif_wake_queue(dev
);
937 static void print_eth(char *add
)
942 for (i
= 0; i
< 6; i
++)
943 printk(" %2.2X", (unsigned char) add
[i
]);
947 for (i
= 0; i
< 6; i
++)
948 printk(" %2.2X", (unsigned char) add
[i
+6]);
951 printk ("type %2.2X%2.2X\n",
952 (unsigned char) add
[12], (unsigned char) add
[13]);
955 static int __init
lp486e_probe(struct net_device
*dev
) {
956 struct i596_private
*lp
;
957 unsigned char eth_addr
[6] = { 0, 0xaa, 0, 0, 0, 0 };
967 if (!request_region(IOADDR
, LP486E_TOTAL_SIZE
, DRV_NAME
)) {
968 printk(KERN_ERR
"lp486e: IO address 0x%x in use\n", IOADDR
);
972 lp
= netdev_priv(dev
);
973 spin_lock_init(&lp
->cmd_lock
);
976 * Do we really have this thing?
978 if (i596_scp_setup(dev
)) {
983 dev
->base_addr
= IOADDR
;
988 * How do we find the ethernet address? I don't know.
989 * One possibility is to look at the EISA configuration area
990 * [0xe8000-0xe9fff]. This contains the ethernet address
991 * but not at a fixed address - things depend on setup options.
993 * If we find no address, or the wrong address, use
994 * ifconfig eth0 hw ether a1:a2:a3:a4:a5:a6
995 * with the value found in the BIOS setup.
997 bios
= bus_to_virt(0xe8000);
998 for (j
= 0; j
< 0x2000; j
++) {
999 if (bios
[j
] == 0 && bios
[j
+1] == 0xaa && bios
[j
+2] == 0) {
1000 printk("%s: maybe address at BIOS 0x%x:",
1001 dev
->name
, 0xe8000+j
);
1002 for (i
= 0; i
< 6; i
++) {
1003 eth_addr
[i
] = bios
[i
+j
];
1004 printk(" %2.2X", eth_addr
[i
]);
1010 printk("%s: lp486e 82596 at %#3lx, IRQ %d,",
1011 dev
->name
, dev
->base_addr
, dev
->irq
);
1012 for (i
= 0; i
< 6; i
++)
1013 printk(" %2.2X", dev
->dev_addr
[i
] = eth_addr
[i
]);
1016 /* The LP486E-specific entries in the device structure. */
1017 dev
->open
= &i596_open
;
1018 dev
->stop
= &i596_close
;
1019 dev
->hard_start_xmit
= &i596_start_xmit
;
1020 dev
->set_multicast_list
= &set_multicast_list
;
1021 dev
->watchdog_timeo
= 5*HZ
;
1022 dev
->tx_timeout
= i596_tx_timeout
;
1025 /* selftest reports 0x320925ae - don't know what that means */
1026 i596_port_do(dev
, PORT_SELFTEST
, "selftest");
1027 i596_port_do(dev
, PORT_DUMP
, "dump");
1032 release_region(IOADDR
, LP486E_TOTAL_SIZE
);
1037 i596_handle_CU_completion(struct net_device
*dev
,
1038 struct i596_private
*lp
,
1039 unsigned short status
,
1040 unsigned short *ack_cmdp
) {
1041 struct i596_cmd
*cmd
;
1043 int commands_done
= 0;
1045 unsigned long flags
;
1047 spin_lock_irqsave(&lp
->cmd_lock
, flags
);
1050 while (lp
->cmd_head
&& (lp
->cmd_head
->status
& CMD_STAT_C
)) {
1053 lp
->cmd_head
= pa_to_va(lp
->cmd_head
->pa_next
);
1057 cmd_val
= cmd
->command
& 0x7;
1059 printk("finished CU %s command (%d)\n",
1060 CUcmdnames
[cmd_val
], cmd_val
);
1065 struct tx_cmd
*tx_cmd
;
1066 struct i596_tbd
*tx_cmd_tbd
;
1068 tx_cmd
= (struct tx_cmd
*) cmd
;
1069 tx_cmd_tbd
= pa_to_va(tx_cmd
->pa_tbd
);
1072 if (cmd
->status
& CMD_STAT_OK
) {
1074 print_eth(pa_to_va(tx_cmd_tbd
->pa_data
));
1076 dev
->stats
.tx_errors
++;
1078 printk("transmission failure:%04x\n",
1080 if (cmd
->status
& 0x0020)
1081 dev
->stats
.collisions
++;
1082 if (!(cmd
->status
& 0x0040))
1083 dev
->stats
.tx_heartbeat_errors
++;
1084 if (cmd
->status
& 0x0400)
1085 dev
->stats
.tx_carrier_errors
++;
1086 if (cmd
->status
& 0x0800)
1087 dev
->stats
.collisions
++;
1088 if (cmd
->status
& 0x1000)
1089 dev
->stats
.tx_aborted_errors
++;
1091 dev_kfree_skb_irq(tx_cmd_tbd
->skb
);
1093 cmd
->pa_next
= I596_NULL
;
1094 kfree((unsigned char *)tx_cmd
);
1095 netif_wake_queue(dev
);
1099 case CmdMulticastList
:
1100 cmd
->pa_next
= I596_NULL
;
1101 kfree((unsigned char *)cmd
);
1106 unsigned long status
= *((unsigned long *) (cmd
+ 1));
1107 if (status
& 0x8000) {
1109 printk("%s: link ok.\n", dev
->name
);
1111 if (status
& 0x4000)
1112 printk("%s: Transceiver problem.\n",
1114 if (status
& 0x2000)
1115 printk("%s: Termination problem.\n",
1117 if (status
& 0x1000)
1118 printk("%s: Short circuit.\n",
1120 printk("%s: Time %ld.\n",
1121 dev
->name
, status
& 0x07ff);
1125 cmd
->pa_next
= I596_NULL
;
1126 lp
->last_cmd
= jiffies
;
1133 while (cmd
&& (cmd
!= lp
->cmd_tail
)) {
1134 cmd
->command
&= 0x1fff;
1135 cmd
= pa_to_va(cmd
->pa_next
);
1140 *ack_cmdp
|= CUC_START
;
1141 lp
->scb
.pa_cmd
= va_to_pa(lp
->cmd_head
);
1142 spin_unlock_irqrestore(&lp
->cmd_lock
, flags
);
1146 i596_interrupt(int irq
, void *dev_instance
)
1148 struct net_device
*dev
= dev_instance
;
1149 struct i596_private
*lp
= netdev_priv(dev
);
1150 unsigned short status
, ack_cmd
= 0;
1154 * The 82596 examines the command, performs the required action,
1155 * and then clears the SCB command word.
1157 if (lp
->scb
.command
&& i596_timeout(dev
, "interrupt", 40))
1161 * The status word indicates the status of the 82596.
1162 * It is modified only by the 82596.
1164 * [So, we must not clear it. I find often status 0xffff,
1165 * which is not one of the values allowed by the docs.]
1167 status
= lp
->scb
.status
;
1170 printk("%s: i596 interrupt, ", dev
->name
);
1171 i596_out_status(status
);
1174 /* Impossible, but it happens - perhaps when we get
1175 a receive interrupt but scb.pa_rfd is I596_NULL. */
1176 if (status
== 0xffff) {
1177 printk("%s: i596_interrupt: got status 0xffff\n", dev
->name
);
1181 ack_cmd
= (status
& STAT_ACK
);
1183 if (status
& (STAT_CX
| STAT_CNA
))
1184 i596_handle_CU_completion(dev
, lp
, status
, &ack_cmd
);
1186 if (status
& (STAT_FR
| STAT_RNR
)) {
1187 /* Restart the receive unit when it got inactive somehow */
1188 if ((status
& STAT_RNR
) && netif_running(dev
))
1189 ack_cmd
|= RX_START
;
1191 if (status
& STAT_FR
) {
1192 frames_in
= i596_rx(dev
);
1194 printk("receive frame reported, but no frames\n");
1198 /* acknowledge the interrupt */
1200 if ((lp->scb.pa_cmd != I596_NULL) && netif_running(dev))
1201 ack_cmd |= CUC_START;
1204 if (lp
->scb
.command
&& i596_timeout(dev
, "i596 interrupt", 100))
1207 lp
->scb
.command
= ack_cmd
;
1216 static int i596_close(struct net_device
*dev
) {
1217 struct i596_private
*lp
= netdev_priv(dev
);
1219 netif_stop_queue(dev
);
1222 printk("%s: Shutting down ethercard, status was %4.4x.\n",
1223 dev
->name
, lp
->scb
.status
);
1225 lp
->scb
.command
= (CUC_ABORT
| RX_ABORT
);
1228 i596_cleanup_cmd(dev
);
1230 if (lp
->scb
.command
&& i596_timeout(dev
, "i596_close", 200))
1233 free_irq(dev
->irq
, dev
);
1234 remove_rx_bufs(dev
);
1240 * Set or clear the multicast filter for this adaptor.
1243 static void set_multicast_list(struct net_device
*dev
) {
1244 struct i596_private
*lp
= netdev_priv(dev
);
1245 struct i596_cmd
*cmd
;
1248 printk ("%s: set multicast list %d\n",
1249 dev
->name
, dev
->mc_count
);
1251 if (dev
->mc_count
> 0) {
1252 struct dev_mc_list
*dmi
;
1254 cmd
= kmalloc(sizeof(struct i596_cmd
)+2+dev
->mc_count
*6, GFP_ATOMIC
);
1256 printk (KERN_ERR
"%s: set_multicast Memory squeeze.\n", dev
->name
);
1259 cmd
->command
= CmdMulticastList
;
1260 *((unsigned short *) (cmd
+ 1)) = dev
->mc_count
* 6;
1261 cp
= ((char *)(cmd
+ 1))+2;
1262 for (dmi
= dev
->mc_list
; dmi
!= NULL
; dmi
= dmi
->next
) {
1266 if (i596_debug
& LOG_SRCDST
)
1267 print_eth (((char *)(cmd
+ 1)) + 2);
1268 i596_add_cmd(dev
, cmd
);
1270 if (lp
->set_conf
.pa_next
!= I596_NULL
) {
1273 if (dev
->mc_count
== 0 && !(dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
))) {
1274 lp
->i596_config
[8] &= ~0x01;
1276 lp
->i596_config
[8] |= 0x01;
1279 i596_add_cmd(dev
, (struct i596_cmd
*) &lp
->set_conf
);
1283 MODULE_AUTHOR("Ard van Breemen <ard@cstmel.nl.eu.org>");
1284 MODULE_DESCRIPTION("Intel Panther onboard i82596 driver");
1285 MODULE_LICENSE("GPL");
1287 static struct net_device
*dev_lp486e
;
1288 static int full_duplex
;
1290 static int io
= IOADDR
;
1291 static int irq
= IRQ
;
1293 module_param(debug
, int, 0);
1294 //module_param(max_interrupt_work, int, 0);
1295 //module_param(reverse_probe, int, 0);
1296 //module_param(rx_copybreak, int, 0);
1297 module_param(options
, int, 0);
1298 module_param(full_duplex
, int, 0);
1300 static int __init
lp486e_init_module(void) {
1302 struct net_device
*dev
= alloc_etherdev(sizeof(struct i596_private
));
1307 dev
->base_addr
= io
;
1308 err
= lp486e_probe(dev
);
1313 err
= register_netdev(dev
);
1315 release_region(dev
->base_addr
, LP486E_TOTAL_SIZE
);
1325 static void __exit
lp486e_cleanup_module(void) {
1326 unregister_netdev(dev_lp486e
);
1327 release_region(dev_lp486e
->base_addr
, LP486E_TOTAL_SIZE
);
1328 free_netdev(dev_lp486e
);
1331 module_init(lp486e_init_module
);
1332 module_exit(lp486e_cleanup_module
);
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