2 * Sun3 i82586 Ethernet driver
4 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
6 * Original copyright follows:
7 * --------------------------
9 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
11 * This is an extension to the Linux operating system, and is covered by the
12 * same Gnu Public License that covers that work.
14 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
15 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
16 * --------------------------
18 * Consult ni52.c for further notes from the original driver.
20 * This incarnation currently supports the OBIO version of the i82586 chip
21 * used in certain sun3 models. It should be fairly doable to expand this
22 * to support VME if I should every acquire such a board.
26 static int debuglevel
= 0; /* debug-printk 0: off 1: a few 2: more */
27 static int automatic_resume
= 0; /* experimental .. better should be zero */
28 static int rfdadd
= 0; /* rfdadd=1 may be better for 8K MEM cards */
29 static int fifo
=0x8; /* don't change */
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/string.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/interrupt.h>
37 #include <linux/delay.h>
38 #include <linux/init.h>
39 #include <linux/bitops.h>
41 #include <asm/idprom.h>
42 #include <asm/machines.h>
43 #include <asm/sun3mmu.h>
45 #include <asm/byteorder.h>
47 #include <linux/netdevice.h>
48 #include <linux/etherdevice.h>
49 #include <linux/skbuff.h>
51 #include "sun3_82586.h"
53 #define DRV_NAME "sun3_82586"
55 #define DEBUG /* debug on */
56 #define SYSBUSVAL 0 /* 16 Bit */
57 #define SUN3_82586_TOTAL_SIZE PAGE_SIZE
59 #define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
60 #define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
61 #define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
62 #define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
63 #define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
65 #define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
66 #define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
67 #define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
69 /******************* how to calculate the buffers *****************************
71 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
72 * --------------- in a different (more stable?) mode. Only in this mode it's
73 * possible to configure the driver with 'NO_NOPCOMMANDS'
75 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
76 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
77 sizeof(rfd) = 24; sizeof(rbd) = 12;
78 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
81 * if you don't know the driver, better do not change these values: */
83 #define RECV_BUFF_SIZE 1536 /* slightly oversized */
84 #define XMIT_BUFF_SIZE 1536 /* slightly oversized */
85 #define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
86 #define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
87 #define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
88 #define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
89 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
91 /**************************************************************************/
93 /* different DELAYs */
94 #define DELAY(x) mdelay(32 * x);
95 #define DELAY_16(); { udelay(16); }
96 #define DELAY_18(); { udelay(4); }
98 /* wait for command with timeout: */
99 #define WAIT_4_SCB_CMD() \
101 for(i=0;i<16384;i++) { \
102 if(!p->scb->cmd_cuc) break; \
105 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
106 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
108 #define WAIT_4_SCB_CMD_RUC() { int i; \
109 for(i=0;i<16384;i++) { \
110 if(!p->scb->cmd_ruc) break; \
113 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
114 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
116 #define WAIT_4_STAT_COMPL(addr) { int i; \
117 for(i=0;i<32767;i++) { \
118 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
119 DELAY_16(); DELAY_16(); } }
121 static int sun3_82586_probe1(struct net_device
*dev
,int ioaddr
);
122 static irqreturn_t
sun3_82586_interrupt(int irq
,void *dev_id
);
123 static int sun3_82586_open(struct net_device
*dev
);
124 static int sun3_82586_close(struct net_device
*dev
);
125 static int sun3_82586_send_packet(struct sk_buff
*,struct net_device
*);
126 static struct net_device_stats
*sun3_82586_get_stats(struct net_device
*dev
);
127 static void set_multicast_list(struct net_device
*dev
);
128 static void sun3_82586_timeout(struct net_device
*dev
);
130 /* helper-functions */
131 static int init586(struct net_device
*dev
);
132 static int check586(struct net_device
*dev
,char *where
,unsigned size
);
133 static void alloc586(struct net_device
*dev
);
134 static void startrecv586(struct net_device
*dev
);
135 static void *alloc_rfa(struct net_device
*dev
,void *ptr
);
136 static void sun3_82586_rcv_int(struct net_device
*dev
);
137 static void sun3_82586_xmt_int(struct net_device
*dev
);
138 static void sun3_82586_rnr_int(struct net_device
*dev
);
146 volatile struct rfd_struct
*rfd_last
,*rfd_top
,*rfd_first
;
147 volatile struct scp_struct
*scp
; /* volatile is important */
148 volatile struct iscp_struct
*iscp
; /* volatile is important */
149 volatile struct scb_struct
*scb
; /* volatile is important */
150 volatile struct tbd_struct
*xmit_buffs
[NUM_XMIT_BUFFS
];
151 volatile struct transmit_cmd_struct
*xmit_cmds
[NUM_XMIT_BUFFS
];
152 #if (NUM_XMIT_BUFFS == 1)
153 volatile struct nop_cmd_struct
*nop_cmds
[2];
155 volatile struct nop_cmd_struct
*nop_cmds
[NUM_XMIT_BUFFS
];
157 volatile int nop_point
,num_recv_buffs
;
158 volatile char *xmit_cbuffs
[NUM_XMIT_BUFFS
];
159 volatile int xmit_count
,xmit_last
;
162 /**********************************************
165 static int sun3_82586_close(struct net_device
*dev
)
167 free_irq(dev
->irq
, dev
);
169 sun3_reset586(); /* the hard way to stop the receiver */
171 netif_stop_queue(dev
);
176 /**********************************************
179 static int sun3_82586_open(struct net_device
*dev
)
189 ret
= request_irq(dev
->irq
, sun3_82586_interrupt
,0,dev
->name
,dev
);
196 netif_start_queue(dev
);
198 return 0; /* most done by init */
201 /**********************************************
202 * Check to see if there's an 82586 out there.
204 static int check586(struct net_device
*dev
,char *where
,unsigned size
)
207 struct priv
*p
= &pb
;
211 p
->base
= (unsigned long) dvma_btov(0);
212 p
->memtop
= (char *)dvma_btov((unsigned long)where
);
213 p
->scp
= (struct scp_struct
*)(p
->base
+ SCP_DEFAULT_ADDRESS
);
214 memset((char *)p
->scp
,0, sizeof(struct scp_struct
));
215 for(i
=0;i
<sizeof(struct scp_struct
);i
++) /* memory was writeable? */
216 if(((char *)p
->scp
)[i
])
218 p
->scp
->sysbus
= SYSBUSVAL
; /* 1 = 8Bit-Bus, 0 = 16 Bit */
219 if(p
->scp
->sysbus
!= SYSBUSVAL
)
222 iscp_addr
= (char *)dvma_btov((unsigned long)where
);
224 p
->iscp
= (struct iscp_struct
*) iscp_addr
;
225 memset((char *)p
->iscp
,0, sizeof(struct iscp_struct
));
227 p
->scp
->iscp
= make24(p
->iscp
);
232 DELAY(1); /* wait a while... */
234 if(p
->iscp
->busy
) /* i82586 clears 'busy' after successful init */
240 /******************************************************************
241 * set iscp at the right place, called by sun3_82586_probe1 and open586.
243 static void alloc586(struct net_device
*dev
)
245 struct priv
*p
= netdev_priv(dev
);
250 p
->scp
= (struct scp_struct
*) (p
->base
+ SCP_DEFAULT_ADDRESS
);
251 p
->iscp
= (struct iscp_struct
*) dvma_btov(dev
->mem_start
);
252 p
->scb
= (struct scb_struct
*) ((char *)p
->iscp
+ sizeof(struct iscp_struct
));
254 memset((char *) p
->iscp
,0,sizeof(struct iscp_struct
));
255 memset((char *) p
->scp
,0,sizeof(struct scp_struct
));
257 p
->scp
->iscp
= make24(p
->iscp
);
258 p
->scp
->sysbus
= SYSBUSVAL
;
259 p
->iscp
->scb_offset
= make16(p
->scb
);
260 p
->iscp
->scb_base
= make24(dvma_btov(dev
->mem_start
));
269 printk("%s: Init-Problems (alloc).\n",dev
->name
);
273 memset((char *)p
->scb
,0,sizeof(struct scb_struct
));
276 struct net_device
* __init
sun3_82586_probe(int unit
)
278 struct net_device
*dev
;
279 unsigned long ioaddr
;
280 static int found
= 0;
283 /* check that this machine has an onboard 82586 */
284 switch(idprom
->id_machtype
) {
285 case SM_SUN3
|SM_3_160
:
286 case SM_SUN3
|SM_3_260
:
287 /* these machines have 82586 */
291 return ERR_PTR(-ENODEV
);
295 return ERR_PTR(-ENODEV
);
297 ioaddr
= (unsigned long)ioremap(IE_OBIO
, SUN3_82586_TOTAL_SIZE
);
299 return ERR_PTR(-ENOMEM
);
302 dev
= alloc_etherdev(sizeof(struct priv
));
306 sprintf(dev
->name
, "eth%d", unit
);
307 netdev_boot_setup_check(dev
);
311 dev
->base_addr
= ioaddr
;
312 err
= sun3_82586_probe1(dev
, ioaddr
);
315 err
= register_netdev(dev
);
321 release_region(ioaddr
, SUN3_82586_TOTAL_SIZE
);
325 iounmap((void __iomem
*)ioaddr
);
329 static const struct net_device_ops sun3_82586_netdev_ops
= {
330 .ndo_open
= sun3_82586_open
,
331 .ndo_stop
= sun3_82586_close
,
332 .ndo_start_xmit
= sun3_82586_send_packet
,
333 .ndo_set_multicast_list
= set_multicast_list
,
334 .ndo_tx_timeout
= sun3_82586_timeout
,
335 .ndo_get_stats
= sun3_82586_get_stats
,
336 .ndo_validate_addr
= eth_validate_addr
,
337 .ndo_set_mac_address
= eth_mac_addr
,
338 .ndo_change_mtu
= eth_change_mtu
,
341 static int __init
sun3_82586_probe1(struct net_device
*dev
,int ioaddr
)
345 if (!request_region(ioaddr
, SUN3_82586_TOTAL_SIZE
, DRV_NAME
))
348 /* copy in the ethernet address from the prom */
349 for(i
= 0; i
< 6 ; i
++)
350 dev
->dev_addr
[i
] = idprom
->id_ethaddr
[i
];
352 printk("%s: SUN3 Intel 82586 found at %lx, ",dev
->name
,dev
->base_addr
);
355 * check (or search) IO-Memory, 32K
359 dev
->mem_start
= (unsigned long)dvma_malloc_align(0x8000, 0x1000);
360 dev
->mem_end
= dev
->mem_start
+ size
;
362 if(size
!= 0x2000 && size
!= 0x4000 && size
!= 0x8000) {
363 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev
->name
,size
);
367 if(!check586(dev
,(char *) dev
->mem_start
,size
)) {
368 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev
->mem_start
,size
);
373 ((struct priv
*)netdev_priv(dev
))->memtop
=
374 (char *)dvma_btov(dev
->mem_start
);
375 ((struct priv
*)netdev_priv(dev
))->base
= (unsigned long) dvma_btov(0);
378 /* set number of receive-buffs according to memsize */
380 ((struct priv
*)netdev_priv(dev
))->num_recv_buffs
=
382 else if(size
== 0x4000)
383 ((struct priv
*)netdev_priv(dev
))->num_recv_buffs
=
386 ((struct priv
*)netdev_priv(dev
))->num_recv_buffs
=
389 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev
->mem_start
,size
, dev
->irq
);
391 dev
->netdev_ops
= &sun3_82586_netdev_ops
;
392 dev
->watchdog_timeo
= HZ
/20;
397 release_region(ioaddr
, SUN3_82586_TOTAL_SIZE
);
402 static int init586(struct net_device
*dev
)
406 struct priv
*p
= netdev_priv(dev
);
407 volatile struct configure_cmd_struct
*cfg_cmd
;
408 volatile struct iasetup_cmd_struct
*ias_cmd
;
409 volatile struct tdr_cmd_struct
*tdr_cmd
;
410 volatile struct mcsetup_cmd_struct
*mc_cmd
;
411 struct netdev_hw_addr
*ha
;
412 int num_addrs
=netdev_mc_count(dev
);
414 ptr
= (void *) ((char *)p
->scb
+ sizeof(struct scb_struct
));
416 cfg_cmd
= (struct configure_cmd_struct
*)ptr
; /* configure-command */
417 cfg_cmd
->cmd_status
= 0;
418 cfg_cmd
->cmd_cmd
= swab16(CMD_CONFIGURE
| CMD_LAST
);
419 cfg_cmd
->cmd_link
= 0xffff;
421 cfg_cmd
->byte_cnt
= 0x0a; /* number of cfg bytes */
422 cfg_cmd
->fifo
= fifo
; /* fifo-limit (8=tx:32/rx:64) */
423 cfg_cmd
->sav_bf
= 0x40; /* hold or discard bad recv frames (bit 7) */
424 cfg_cmd
->adr_len
= 0x2e; /* addr_len |!src_insert |pre-len |loopback */
425 cfg_cmd
->priority
= 0x00;
427 cfg_cmd
->time_low
= 0x00;
428 cfg_cmd
->time_high
= 0xf2;
429 cfg_cmd
->promisc
= 0;
430 if(dev
->flags
& IFF_ALLMULTI
) {
431 int len
= ((char *) p
->iscp
- (char *) ptr
- 8) / 6;
432 if(num_addrs
> len
) {
433 printk("%s: switching to promisc. mode\n",dev
->name
);
434 cfg_cmd
->promisc
= 1;
437 if(dev
->flags
&IFF_PROMISC
)
438 cfg_cmd
->promisc
= 1;
439 cfg_cmd
->carr_coll
= 0x00;
441 p
->scb
->cbl_offset
= make16(cfg_cmd
);
444 p
->scb
->cmd_cuc
= CUC_START
; /* cmd.-unit start */
447 WAIT_4_STAT_COMPL(cfg_cmd
);
449 if((swab16(cfg_cmd
->cmd_status
) & (STAT_OK
|STAT_COMPL
)) != (STAT_COMPL
|STAT_OK
))
451 printk("%s: configure command failed: %x\n",dev
->name
,swab16(cfg_cmd
->cmd_status
));
456 * individual address setup
459 ias_cmd
= (struct iasetup_cmd_struct
*)ptr
;
461 ias_cmd
->cmd_status
= 0;
462 ias_cmd
->cmd_cmd
= swab16(CMD_IASETUP
| CMD_LAST
);
463 ias_cmd
->cmd_link
= 0xffff;
465 memcpy((char *)&ias_cmd
->iaddr
,(char *) dev
->dev_addr
,ETH_ALEN
);
467 p
->scb
->cbl_offset
= make16(ias_cmd
);
469 p
->scb
->cmd_cuc
= CUC_START
; /* cmd.-unit start */
472 WAIT_4_STAT_COMPL(ias_cmd
);
474 if((swab16(ias_cmd
->cmd_status
) & (STAT_OK
|STAT_COMPL
)) != (STAT_OK
|STAT_COMPL
)) {
475 printk("%s (82586): individual address setup command failed: %04x\n",dev
->name
,swab16(ias_cmd
->cmd_status
));
480 * TDR, wire check .. e.g. no resistor e.t.c
483 tdr_cmd
= (struct tdr_cmd_struct
*)ptr
;
485 tdr_cmd
->cmd_status
= 0;
486 tdr_cmd
->cmd_cmd
= swab16(CMD_TDR
| CMD_LAST
);
487 tdr_cmd
->cmd_link
= 0xffff;
490 p
->scb
->cbl_offset
= make16(tdr_cmd
);
491 p
->scb
->cmd_cuc
= CUC_START
; /* cmd.-unit start */
494 WAIT_4_STAT_COMPL(tdr_cmd
);
496 if(!(swab16(tdr_cmd
->cmd_status
) & STAT_COMPL
))
498 printk("%s: Problems while running the TDR.\n",dev
->name
);
502 DELAY_16(); /* wait for result */
503 result
= swab16(tdr_cmd
->status
);
505 p
->scb
->cmd_cuc
= p
->scb
->cus
& STAT_MASK
;
506 sun3_attn586(); /* ack the interrupts */
508 if(result
& TDR_LNK_OK
)
510 else if(result
& TDR_XCVR_PRB
)
511 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev
->name
);
512 else if(result
& TDR_ET_OPN
)
513 printk("%s: TDR: No correct termination %d clocks away.\n",dev
->name
,result
& TDR_TIMEMASK
);
514 else if(result
& TDR_ET_SRT
)
516 if (result
& TDR_TIMEMASK
) /* time == 0 -> strange :-) */
517 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev
->name
,result
& TDR_TIMEMASK
);
520 printk("%s: TDR: Unknown status %04x\n",dev
->name
,result
);
526 if(num_addrs
&& !(dev
->flags
& IFF_PROMISC
) )
528 mc_cmd
= (struct mcsetup_cmd_struct
*) ptr
;
529 mc_cmd
->cmd_status
= 0;
530 mc_cmd
->cmd_cmd
= swab16(CMD_MCSETUP
| CMD_LAST
);
531 mc_cmd
->cmd_link
= 0xffff;
532 mc_cmd
->mc_cnt
= swab16(num_addrs
* 6);
535 netdev_for_each_mc_addr(ha
, dev
)
536 memcpy((char *) mc_cmd
->mc_list
[i
++],
539 p
->scb
->cbl_offset
= make16(mc_cmd
);
540 p
->scb
->cmd_cuc
= CUC_START
;
543 WAIT_4_STAT_COMPL(mc_cmd
);
545 if( (swab16(mc_cmd
->cmd_status
) & (STAT_COMPL
|STAT_OK
)) != (STAT_COMPL
|STAT_OK
) )
546 printk("%s: Can't apply multicast-address-list.\n",dev
->name
);
550 * alloc nop/xmit-cmds
552 #if (NUM_XMIT_BUFFS == 1)
555 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*)ptr
;
556 p
->nop_cmds
[i
]->cmd_cmd
= swab16(CMD_NOP
);
557 p
->nop_cmds
[i
]->cmd_status
= 0;
558 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
559 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
562 for(i
=0;i
<NUM_XMIT_BUFFS
;i
++)
564 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*)ptr
;
565 p
->nop_cmds
[i
]->cmd_cmd
= swab16(CMD_NOP
);
566 p
->nop_cmds
[i
]->cmd_status
= 0;
567 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
568 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
572 ptr
= alloc_rfa(dev
,(void *)ptr
); /* init receive-frame-area */
575 * alloc xmit-buffs / init xmit_cmds
577 for(i
=0;i
<NUM_XMIT_BUFFS
;i
++)
579 p
->xmit_cmds
[i
] = (struct transmit_cmd_struct
*)ptr
; /*transmit cmd/buff 0*/
580 ptr
= (char *) ptr
+ sizeof(struct transmit_cmd_struct
);
581 p
->xmit_cbuffs
[i
] = (char *)ptr
; /* char-buffs */
582 ptr
= (char *) ptr
+ XMIT_BUFF_SIZE
;
583 p
->xmit_buffs
[i
] = (struct tbd_struct
*)ptr
; /* TBD */
584 ptr
= (char *) ptr
+ sizeof(struct tbd_struct
);
585 if((void *)ptr
> (void *)dev
->mem_end
)
587 printk("%s: not enough shared-mem for your configuration!\n",dev
->name
);
590 memset((char *)(p
->xmit_cmds
[i
]) ,0, sizeof(struct transmit_cmd_struct
));
591 memset((char *)(p
->xmit_buffs
[i
]),0, sizeof(struct tbd_struct
));
592 p
->xmit_cmds
[i
]->cmd_link
= make16(p
->nop_cmds
[(i
+1)%NUM_XMIT_BUFFS
]);
593 p
->xmit_cmds
[i
]->cmd_status
= swab16(STAT_COMPL
);
594 p
->xmit_cmds
[i
]->cmd_cmd
= swab16(CMD_XMIT
| CMD_INT
);
595 p
->xmit_cmds
[i
]->tbd_offset
= make16((p
->xmit_buffs
[i
]));
596 p
->xmit_buffs
[i
]->next
= 0xffff;
597 p
->xmit_buffs
[i
]->buffer
= make24((p
->xmit_cbuffs
[i
]));
602 #ifndef NO_NOPCOMMANDS
607 * 'start transmitter'
609 #ifndef NO_NOPCOMMANDS
610 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[0]);
611 p
->scb
->cmd_cuc
= CUC_START
;
615 p
->xmit_cmds
[0]->cmd_link
= make16(p
->xmit_cmds
[0]);
616 p
->xmit_cmds
[0]->cmd_cmd
= swab16(CMD_XMIT
| CMD_SUSPEND
| CMD_INT
);
622 p
->scb
->cmd_cuc
= p
->scb
->cus
& STAT_MASK
;
632 /******************************************************
633 * This is a helper routine for sun3_82586_rnr_int() and init586().
634 * It sets up the Receive Frame Area (RFA).
637 static void *alloc_rfa(struct net_device
*dev
,void *ptr
)
639 volatile struct rfd_struct
*rfd
= (struct rfd_struct
*)ptr
;
640 volatile struct rbd_struct
*rbd
;
642 struct priv
*p
= netdev_priv(dev
);
644 memset((char *) rfd
,0,sizeof(struct rfd_struct
)*(p
->num_recv_buffs
+rfdadd
));
647 for(i
= 0; i
< (p
->num_recv_buffs
+rfdadd
); i
++) {
648 rfd
[i
].next
= make16(rfd
+ (i
+1) % (p
->num_recv_buffs
+rfdadd
) );
649 rfd
[i
].rbd_offset
= 0xffff;
651 rfd
[p
->num_recv_buffs
-1+rfdadd
].last
= RFD_SUSP
; /* RU suspend */
653 ptr
= (void *) (rfd
+ (p
->num_recv_buffs
+ rfdadd
) );
655 rbd
= (struct rbd_struct
*) ptr
;
656 ptr
= (void *) (rbd
+ p
->num_recv_buffs
);
658 /* clr descriptors */
659 memset((char *) rbd
,0,sizeof(struct rbd_struct
)*(p
->num_recv_buffs
));
661 for(i
=0;i
<p
->num_recv_buffs
;i
++)
663 rbd
[i
].next
= make16((rbd
+ (i
+1) % p
->num_recv_buffs
));
664 rbd
[i
].size
= swab16(RECV_BUFF_SIZE
);
665 rbd
[i
].buffer
= make24(ptr
);
666 ptr
= (char *) ptr
+ RECV_BUFF_SIZE
;
669 p
->rfd_top
= p
->rfd_first
;
670 p
->rfd_last
= p
->rfd_first
+ (p
->num_recv_buffs
- 1 + rfdadd
);
672 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
673 p
->rfd_first
->rbd_offset
= make16(rbd
);
679 /**************************************************
680 * Interrupt Handler ...
683 static irqreturn_t
sun3_82586_interrupt(int irq
,void *dev_id
)
685 struct net_device
*dev
= dev_id
;
691 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq
);
694 p
= netdev_priv(dev
);
699 WAIT_4_SCB_CMD(); /* wait for last command */
701 while((stat
=p
->scb
->cus
& STAT_MASK
))
703 p
->scb
->cmd_cuc
= stat
;
706 if(stat
& STAT_FR
) /* received a frame */
707 sun3_82586_rcv_int(dev
);
709 if(stat
& STAT_RNR
) /* RU went 'not ready' */
712 if(p
->scb
->rus
& RU_SUSPEND
) /* special case: RU_SUSPEND */
715 p
->scb
->cmd_ruc
= RUC_RESUME
;
717 WAIT_4_SCB_CMD_RUC();
721 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev
->name
,(int) stat
,(int) p
->scb
->rus
);
722 sun3_82586_rnr_int(dev
);
726 if(stat
& STAT_CX
) /* command with I-bit set complete */
727 sun3_82586_xmt_int(dev
);
729 #ifndef NO_NOPCOMMANDS
730 if(stat
& STAT_CNA
) /* CU went 'not ready' */
732 if(netif_running(dev
))
733 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev
->name
,(int) stat
,(int) p
->scb
->cus
);
740 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
741 if(p
->scb
->cmd_cuc
) /* timed out? */
743 printk("%s: Acknowledge timed out.\n",dev
->name
);
754 /*******************************************************
758 static void sun3_82586_rcv_int(struct net_device
*dev
)
761 unsigned short totlen
;
763 struct rbd_struct
*rbd
;
764 struct priv
*p
= netdev_priv(dev
);
769 for(;(status
= p
->rfd_top
->stat_high
) & RFD_COMPL
;)
771 rbd
= (struct rbd_struct
*) make32(p
->rfd_top
->rbd_offset
);
773 if(status
& RFD_OK
) /* frame received without error? */
775 if( (totlen
= swab16(rbd
->status
)) & RBD_LAST
) /* the first and the last buffer? */
777 totlen
&= RBD_MASK
; /* length of this frame */
779 skb
= (struct sk_buff
*) dev_alloc_skb(totlen
+2);
784 skb_copy_to_linear_data(skb
,(char *) p
->base
+swab32((unsigned long) rbd
->buffer
),totlen
);
785 skb
->protocol
=eth_type_trans(skb
,dev
);
787 dev
->stats
.rx_packets
++;
790 dev
->stats
.rx_dropped
++;
795 /* free all RBD's until RBD_LAST is set */
797 while(!((rstat
=swab16(rbd
->status
)) & RBD_LAST
))
799 totlen
+= rstat
& RBD_MASK
;
802 printk("%s: Whoops .. no end mark in RBD list\n",dev
->name
);
806 rbd
= (struct rbd_struct
*) make32(rbd
->next
);
808 totlen
+= rstat
& RBD_MASK
;
810 printk("%s: received oversized frame! length: %d\n",dev
->name
,totlen
);
811 dev
->stats
.rx_dropped
++;
814 else /* frame !(ok), only with 'save-bad-frames' */
816 printk("%s: oops! rfd-error-status: %04x\n",dev
->name
,status
);
817 dev
->stats
.rx_errors
++;
819 p
->rfd_top
->stat_high
= 0;
820 p
->rfd_top
->last
= RFD_SUSP
; /* maybe exchange by RFD_LAST */
821 p
->rfd_top
->rbd_offset
= 0xffff;
822 p
->rfd_last
->last
= 0; /* delete RFD_SUSP */
823 p
->rfd_last
= p
->rfd_top
;
824 p
->rfd_top
= (struct rfd_struct
*) make32(p
->rfd_top
->next
); /* step to next RFD */
825 p
->scb
->rfa_offset
= make16(p
->rfd_top
);
834 p
->scb
->cmd_ruc
= RUC_RESUME
;
836 WAIT_4_SCB_CMD_RUC();
844 if(p
->rfd_top
->status
)
848 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev
->name
);
858 /**********************************************************
859 * handle 'Receiver went not ready'.
862 static void sun3_82586_rnr_int(struct net_device
*dev
)
864 struct priv
*p
= netdev_priv(dev
);
866 dev
->stats
.rx_errors
++;
868 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
869 p
->scb
->cmd_ruc
= RUC_ABORT
; /* usually the RU is in the 'no resource'-state .. abort it now. */
871 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
873 alloc_rfa(dev
,(char *)p
->rfd_first
);
874 /* maybe add a check here, before restarting the RU */
875 startrecv586(dev
); /* restart RU */
877 printk("%s: Receive-Unit restarted. Status: %04x\n",dev
->name
,p
->scb
->rus
);
881 /**********************************************************
882 * handle xmit - interrupt
885 static void sun3_82586_xmt_int(struct net_device
*dev
)
888 struct priv
*p
= netdev_priv(dev
);
893 status
= swab16(p
->xmit_cmds
[p
->xmit_last
]->cmd_status
);
894 if(!(status
& STAT_COMPL
))
895 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev
->name
);
899 dev
->stats
.tx_packets
++;
900 dev
->stats
.collisions
+= (status
& TCMD_MAXCOLLMASK
);
904 dev
->stats
.tx_errors
++;
905 if(status
& TCMD_LATECOLL
) {
906 printk("%s: late collision detected.\n",dev
->name
);
907 dev
->stats
.collisions
++;
909 else if(status
& TCMD_NOCARRIER
) {
910 dev
->stats
.tx_carrier_errors
++;
911 printk("%s: no carrier detected.\n",dev
->name
);
913 else if(status
& TCMD_LOSTCTS
)
914 printk("%s: loss of CTS detected.\n",dev
->name
);
915 else if(status
& TCMD_UNDERRUN
) {
916 dev
->stats
.tx_fifo_errors
++;
917 printk("%s: DMA underrun detected.\n",dev
->name
);
919 else if(status
& TCMD_MAXCOLL
) {
920 printk("%s: Max. collisions exceeded.\n",dev
->name
);
921 dev
->stats
.collisions
+= 16;
925 #if (NUM_XMIT_BUFFS > 1)
926 if( (++p
->xmit_last
) == NUM_XMIT_BUFFS
)
929 netif_wake_queue(dev
);
932 /***********************************************************
933 * (re)start the receiver
936 static void startrecv586(struct net_device
*dev
)
938 struct priv
*p
= netdev_priv(dev
);
941 WAIT_4_SCB_CMD_RUC();
942 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
943 p
->scb
->cmd_ruc
= RUC_START
;
944 sun3_attn586(); /* start cmd. */
945 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
948 static void sun3_82586_timeout(struct net_device
*dev
)
950 struct priv
*p
= netdev_priv(dev
);
951 #ifndef NO_NOPCOMMANDS
952 if(p
->scb
->cus
& CU_ACTIVE
) /* COMMAND-UNIT active? */
954 netif_wake_queue(dev
);
956 printk("%s: strange ... timeout with CU active?!?\n",dev
->name
);
957 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev
->name
,(int)swab16(p
->xmit_cmds
[0]->cmd_status
),(int)swab16(p
->nop_cmds
[0]->cmd_status
),(int)swab16(p
->nop_cmds
[1]->cmd_status
),(int)p
->nop_point
);
959 p
->scb
->cmd_cuc
= CUC_ABORT
;
962 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[p
->nop_point
]);
963 p
->scb
->cmd_cuc
= CUC_START
;
966 dev
->trans_start
= jiffies
; /* prevent tx timeout */
972 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev
->name
,p
->scb
->cus
);
973 printk("%s: command-stats: %04x %04x\n",dev
->name
,swab16(p
->xmit_cmds
[0]->cmd_status
),swab16(p
->xmit_cmds
[1]->cmd_status
));
974 printk("%s: check, whether you set the right interrupt number!\n",dev
->name
);
976 sun3_82586_close(dev
);
977 sun3_82586_open(dev
);
979 dev
->trans_start
= jiffies
; /* prevent tx timeout */
982 /******************************************************
986 static int sun3_82586_send_packet(struct sk_buff
*skb
, struct net_device
*dev
)
989 #ifndef NO_NOPCOMMANDS
992 struct priv
*p
= netdev_priv(dev
);
994 if(skb
->len
> XMIT_BUFF_SIZE
)
996 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev
->name
,XMIT_BUFF_SIZE
,skb
->len
);
1000 netif_stop_queue(dev
);
1002 #if(NUM_XMIT_BUFFS > 1)
1003 if(test_and_set_bit(0,(void *) &p
->lock
)) {
1004 printk("%s: Queue was locked\n",dev
->name
);
1005 return NETDEV_TX_BUSY
;
1011 if (len
< ETH_ZLEN
) {
1012 memset((void *)p
->xmit_cbuffs
[p
->xmit_count
], 0,
1016 skb_copy_from_linear_data(skb
, (void *)p
->xmit_cbuffs
[p
->xmit_count
], skb
->len
);
1018 #if (NUM_XMIT_BUFFS == 1)
1019 # ifdef NO_NOPCOMMANDS
1022 if(p
->scb
->cus
& CU_ACTIVE
)
1024 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev
->name
);
1025 printk("%s: stat: %04x %04x\n",dev
->name
,p
->scb
->cus
,swab16(p
->xmit_cmds
[0]->cmd_status
));
1029 p
->xmit_buffs
[0]->size
= swab16(TBD_LAST
| len
);
1032 p
->xmit_cmds
[0]->cmd_status
= 0;
1034 if( (p
->scb
->cus
& CU_STATUS
) == CU_SUSPEND
)
1035 p
->scb
->cmd_cuc
= CUC_RESUME
;
1038 p
->scb
->cbl_offset
= make16(p
->xmit_cmds
[0]);
1039 p
->scb
->cmd_cuc
= CUC_START
;
1046 if( (p
->scb
->cus
& CU_ACTIVE
)) /* test it, because CU sometimes doesn't start immediately */
1048 if(p
->xmit_cmds
[0]->cmd_status
)
1051 printk("%s: Can't start transmit-command.\n",dev
->name
);
1054 next_nop
= (p
->nop_point
+ 1) & 0x1;
1055 p
->xmit_buffs
[0]->size
= swab16(TBD_LAST
| len
);
1057 p
->xmit_cmds
[0]->cmd_link
= p
->nop_cmds
[next_nop
]->cmd_link
1058 = make16((p
->nop_cmds
[next_nop
]));
1059 p
->xmit_cmds
[0]->cmd_status
= p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1061 p
->nop_cmds
[p
->nop_point
]->cmd_link
= make16((p
->xmit_cmds
[0]));
1062 p
->nop_point
= next_nop
;
1066 p
->xmit_buffs
[p
->xmit_count
]->size
= swab16(TBD_LAST
| len
);
1067 if( (next_nop
= p
->xmit_count
+ 1) == NUM_XMIT_BUFFS
)
1070 p
->xmit_cmds
[p
->xmit_count
]->cmd_status
= 0;
1071 /* linkpointer of xmit-command already points to next nop cmd */
1072 p
->nop_cmds
[next_nop
]->cmd_link
= make16((p
->nop_cmds
[next_nop
]));
1073 p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1075 p
->nop_cmds
[p
->xmit_count
]->cmd_link
= make16((p
->xmit_cmds
[p
->xmit_count
]));
1076 p
->xmit_count
= next_nop
;
1079 unsigned long flags
;
1080 local_irq_save(flags
);
1081 if(p
->xmit_count
!= p
->xmit_last
)
1082 netif_wake_queue(dev
);
1084 local_irq_restore(flags
);
1089 return NETDEV_TX_OK
;
1092 /*******************************************
1093 * Someone wanna have the statistics
1096 static struct net_device_stats
*sun3_82586_get_stats(struct net_device
*dev
)
1098 struct priv
*p
= netdev_priv(dev
);
1099 unsigned short crc
,aln
,rsc
,ovrn
;
1101 crc
= swab16(p
->scb
->crc_errs
); /* get error-statistic from the ni82586 */
1102 p
->scb
->crc_errs
= 0;
1103 aln
= swab16(p
->scb
->aln_errs
);
1104 p
->scb
->aln_errs
= 0;
1105 rsc
= swab16(p
->scb
->rsc_errs
);
1106 p
->scb
->rsc_errs
= 0;
1107 ovrn
= swab16(p
->scb
->ovrn_errs
);
1108 p
->scb
->ovrn_errs
= 0;
1110 dev
->stats
.rx_crc_errors
+= crc
;
1111 dev
->stats
.rx_fifo_errors
+= ovrn
;
1112 dev
->stats
.rx_frame_errors
+= aln
;
1113 dev
->stats
.rx_dropped
+= rsc
;
1118 /********************************************************
1122 static void set_multicast_list(struct net_device
*dev
)
1124 netif_stop_queue(dev
);
1130 netif_wake_queue(dev
);
1134 #error This code is not currently supported as a module
1135 static struct net_device
*dev_sun3_82586
;
1137 int init_module(void)
1139 dev_sun3_82586
= sun3_82586_probe(-1);
1140 if (IS_ERR(dev_sun3_82586
))
1141 return PTR_ERR(dev_sun3_82586
);
1145 void cleanup_module(void)
1147 unsigned long ioaddr
= dev_sun3_82586
->base_addr
;
1148 unregister_netdev(dev_sun3_82586
);
1149 release_region(ioaddr
, SUN3_82586_TOTAL_SIZE
);
1150 iounmap((void *)ioaddr
);
1151 free_netdev(dev_sun3_82586
);
1156 MODULE_LICENSE("GPL");