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/kernel.h>
32 #include <linux/module.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 netdev_tx_t sun3_82586_send_packet(struct sk_buff *,
126 struct net_device *);
127 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
128 static void set_multicast_list(struct net_device *dev);
129 static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue);
131 static void sun3_82586_dump(struct net_device *,void *);
134 /* helper-functions */
135 static int init586(struct net_device *dev);
136 static int check586(struct net_device *dev,char *where,unsigned size);
137 static void alloc586(struct net_device *dev);
138 static void startrecv586(struct net_device *dev);
139 static void *alloc_rfa(struct net_device *dev,void *ptr);
140 static void sun3_82586_rcv_int(struct net_device *dev);
141 static void sun3_82586_xmt_int(struct net_device *dev);
142 static void sun3_82586_rnr_int(struct net_device *dev);
150 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
151 volatile struct scp_struct *scp; /* volatile is important */
152 volatile struct iscp_struct *iscp; /* volatile is important */
153 volatile struct scb_struct *scb; /* volatile is important */
154 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
155 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
156 #if (NUM_XMIT_BUFFS == 1)
157 volatile struct nop_cmd_struct *nop_cmds[2];
159 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
161 volatile int nop_point,num_recv_buffs;
162 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
163 volatile int xmit_count,xmit_last;
166 /**********************************************
169 static int sun3_82586_close(struct net_device *dev)
171 free_irq(dev->irq, dev);
173 sun3_reset586(); /* the hard way to stop the receiver */
175 netif_stop_queue(dev);
180 /**********************************************
183 static int sun3_82586_open(struct net_device *dev)
193 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
200 netif_start_queue(dev);
202 return 0; /* most done by init */
205 /**********************************************
206 * Check to see if there's an 82586 out there.
208 static int check586(struct net_device *dev,char *where,unsigned size)
211 struct priv *p = &pb;
215 p->base = (unsigned long) dvma_btov(0);
216 p->memtop = (char *)dvma_btov((unsigned long)where);
217 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
218 memset((char *)p->scp,0, sizeof(struct scp_struct));
219 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
220 if(((char *)p->scp)[i])
222 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
223 if(p->scp->sysbus != SYSBUSVAL)
226 iscp_addr = (char *)dvma_btov((unsigned long)where);
228 p->iscp = (struct iscp_struct *) iscp_addr;
229 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
231 p->scp->iscp = make24(p->iscp);
236 DELAY(1); /* wait a while... */
238 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
244 /******************************************************************
245 * set iscp at the right place, called by sun3_82586_probe1 and open586.
247 static void alloc586(struct net_device *dev)
249 struct priv *p = netdev_priv(dev);
254 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
255 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
256 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
258 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
259 memset((char *) p->scp ,0,sizeof(struct scp_struct));
261 p->scp->iscp = make24(p->iscp);
262 p->scp->sysbus = SYSBUSVAL;
263 p->iscp->scb_offset = make16(p->scb);
264 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
273 printk("%s: Init-Problems (alloc).\n",dev->name);
277 memset((char *)p->scb,0,sizeof(struct scb_struct));
280 static int __init sun3_82586_probe(void)
282 struct net_device *dev;
283 unsigned long ioaddr;
284 static int found = 0;
287 /* check that this machine has an onboard 82586 */
288 switch(idprom->id_machtype) {
289 case SM_SUN3|SM_3_160:
290 case SM_SUN3|SM_3_260:
291 /* these machines have 82586 */
301 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
306 dev = alloc_etherdev(sizeof(struct priv));
310 dev->base_addr = ioaddr;
311 err = sun3_82586_probe1(dev, ioaddr);
314 err = register_netdev(dev);
320 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
324 iounmap((void __iomem *)ioaddr);
327 module_init(sun3_82586_probe);
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_rx_mode = 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,
340 static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
344 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
347 /* copy in the ethernet address from the prom */
348 for(i = 0; i < 6 ; i++)
349 dev->dev_addr[i] = idprom->id_ethaddr[i];
351 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
354 * check (or search) IO-Memory, 32K
358 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
359 dev->mem_end = dev->mem_start + size;
361 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
362 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
366 if(!check586(dev,(char *) dev->mem_start,size)) {
367 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
372 ((struct priv *)netdev_priv(dev))->memtop =
373 (char *)dvma_btov(dev->mem_start);
374 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
377 /* set number of receive-buffs according to memsize */
379 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
381 else if(size == 0x4000)
382 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
385 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
388 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
390 dev->netdev_ops = &sun3_82586_netdev_ops;
391 dev->watchdog_timeo = HZ/20;
396 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
401 static int init586(struct net_device *dev)
405 struct priv *p = netdev_priv(dev);
406 volatile struct configure_cmd_struct *cfg_cmd;
407 volatile struct iasetup_cmd_struct *ias_cmd;
408 volatile struct tdr_cmd_struct *tdr_cmd;
409 volatile struct mcsetup_cmd_struct *mc_cmd;
410 struct netdev_hw_addr *ha;
411 int num_addrs=netdev_mc_count(dev);
413 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
415 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
416 cfg_cmd->cmd_status = 0;
417 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
418 cfg_cmd->cmd_link = 0xffff;
420 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
421 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
422 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
423 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
424 cfg_cmd->priority = 0x00;
426 cfg_cmd->time_low = 0x00;
427 cfg_cmd->time_high = 0xf2;
428 cfg_cmd->promisc = 0;
429 if(dev->flags & IFF_ALLMULTI) {
430 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
431 if(num_addrs > len) {
432 printk("%s: switching to promisc. mode\n",dev->name);
433 cfg_cmd->promisc = 1;
436 if(dev->flags&IFF_PROMISC)
437 cfg_cmd->promisc = 1;
438 cfg_cmd->carr_coll = 0x00;
440 p->scb->cbl_offset = make16(cfg_cmd);
443 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
446 WAIT_4_STAT_COMPL(cfg_cmd);
448 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
450 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
455 * individual address setup
458 ias_cmd = (struct iasetup_cmd_struct *)ptr;
460 ias_cmd->cmd_status = 0;
461 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
462 ias_cmd->cmd_link = 0xffff;
464 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
466 p->scb->cbl_offset = make16(ias_cmd);
468 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
471 WAIT_4_STAT_COMPL(ias_cmd);
473 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
474 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
479 * TDR, wire check .. e.g. no resistor e.t.c
482 tdr_cmd = (struct tdr_cmd_struct *)ptr;
484 tdr_cmd->cmd_status = 0;
485 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
486 tdr_cmd->cmd_link = 0xffff;
489 p->scb->cbl_offset = make16(tdr_cmd);
490 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
493 WAIT_4_STAT_COMPL(tdr_cmd);
495 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
497 printk("%s: Problems while running the TDR.\n",dev->name);
501 DELAY_16(); /* wait for result */
502 result = swab16(tdr_cmd->status);
504 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
505 sun3_attn586(); /* ack the interrupts */
507 if(result & TDR_LNK_OK)
509 else if(result & TDR_XCVR_PRB)
510 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
511 else if(result & TDR_ET_OPN)
512 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
513 else if(result & TDR_ET_SRT)
515 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
516 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
519 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
525 if(num_addrs && !(dev->flags & IFF_PROMISC) )
527 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
528 mc_cmd->cmd_status = 0;
529 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
530 mc_cmd->cmd_link = 0xffff;
531 mc_cmd->mc_cnt = swab16(num_addrs * 6);
534 netdev_for_each_mc_addr(ha, dev)
535 memcpy((char *) mc_cmd->mc_list[i++],
538 p->scb->cbl_offset = make16(mc_cmd);
539 p->scb->cmd_cuc = CUC_START;
542 WAIT_4_STAT_COMPL(mc_cmd);
544 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
545 printk("%s: Can't apply multicast-address-list.\n",dev->name);
549 * alloc nop/xmit-cmds
551 #if (NUM_XMIT_BUFFS == 1)
554 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
555 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
556 p->nop_cmds[i]->cmd_status = 0;
557 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
558 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
561 for(i=0;i<NUM_XMIT_BUFFS;i++)
563 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
564 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
565 p->nop_cmds[i]->cmd_status = 0;
566 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
567 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
571 ptr = alloc_rfa(dev,ptr); /* init receive-frame-area */
574 * alloc xmit-buffs / init xmit_cmds
576 for(i=0;i<NUM_XMIT_BUFFS;i++)
578 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
579 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
580 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
581 ptr = (char *) ptr + XMIT_BUFF_SIZE;
582 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
583 ptr = (char *) ptr + sizeof(struct tbd_struct);
584 if(ptr > (void *)dev->mem_end)
586 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
589 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
590 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
591 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
592 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
593 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
594 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
595 p->xmit_buffs[i]->next = 0xffff;
596 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
601 #ifndef NO_NOPCOMMANDS
606 * 'start transmitter'
608 #ifndef NO_NOPCOMMANDS
609 p->scb->cbl_offset = make16(p->nop_cmds[0]);
610 p->scb->cmd_cuc = CUC_START;
614 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
615 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
621 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
631 /******************************************************
632 * This is a helper routine for sun3_82586_rnr_int() and init586().
633 * It sets up the Receive Frame Area (RFA).
636 static void *alloc_rfa(struct net_device *dev,void *ptr)
638 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
639 volatile struct rbd_struct *rbd;
641 struct priv *p = netdev_priv(dev);
643 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
646 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
647 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
648 rfd[i].rbd_offset = 0xffff;
650 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
652 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
654 rbd = (struct rbd_struct *) ptr;
655 ptr = (void *) (rbd + p->num_recv_buffs);
657 /* clr descriptors */
658 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
660 for(i=0;i<p->num_recv_buffs;i++)
662 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
663 rbd[i].size = swab16(RECV_BUFF_SIZE);
664 rbd[i].buffer = make24(ptr);
665 ptr = (char *) ptr + RECV_BUFF_SIZE;
668 p->rfd_top = p->rfd_first;
669 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
671 p->scb->rfa_offset = make16(p->rfd_first);
672 p->rfd_first->rbd_offset = make16(rbd);
678 /**************************************************
679 * Interrupt Handler ...
682 static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
684 struct net_device *dev = dev_id;
690 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
693 p = netdev_priv(dev);
698 WAIT_4_SCB_CMD(); /* wait for last command */
700 while((stat=p->scb->cus & STAT_MASK))
702 p->scb->cmd_cuc = stat;
705 if(stat & STAT_FR) /* received a frame */
706 sun3_82586_rcv_int(dev);
708 if(stat & STAT_RNR) /* RU went 'not ready' */
711 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
714 p->scb->cmd_ruc = RUC_RESUME;
716 WAIT_4_SCB_CMD_RUC();
720 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
721 sun3_82586_rnr_int(dev);
725 if(stat & STAT_CX) /* command with I-bit set complete */
726 sun3_82586_xmt_int(dev);
728 #ifndef NO_NOPCOMMANDS
729 if(stat & STAT_CNA) /* CU went 'not ready' */
731 if(netif_running(dev))
732 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
739 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
740 if(p->scb->cmd_cuc) /* timed out? */
742 printk("%s: Acknowledge timed out.\n",dev->name);
753 /*******************************************************
757 static void sun3_82586_rcv_int(struct net_device *dev)
760 unsigned short totlen;
762 struct rbd_struct *rbd;
763 struct priv *p = netdev_priv(dev);
768 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
770 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
772 if(status & RFD_OK) /* frame received without error? */
774 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
776 totlen &= RBD_MASK; /* length of this frame */
778 skb = netdev_alloc_skb(dev, totlen + 2);
783 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
784 skb->protocol=eth_type_trans(skb,dev);
786 dev->stats.rx_packets++;
789 dev->stats.rx_dropped++;
794 /* free all RBD's until RBD_LAST is set */
796 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
798 totlen += rstat & RBD_MASK;
801 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
805 rbd = (struct rbd_struct *) make32(rbd->next);
807 totlen += rstat & RBD_MASK;
809 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
810 dev->stats.rx_dropped++;
813 else /* frame !(ok), only with 'save-bad-frames' */
815 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
816 dev->stats.rx_errors++;
818 p->rfd_top->stat_high = 0;
819 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
820 p->rfd_top->rbd_offset = 0xffff;
821 p->rfd_last->last = 0; /* delete RFD_SUSP */
822 p->rfd_last = p->rfd_top;
823 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
824 p->scb->rfa_offset = make16(p->rfd_top);
833 p->scb->cmd_ruc = RUC_RESUME;
835 WAIT_4_SCB_CMD_RUC();
843 if(p->rfd_top->status)
847 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
856 volatile struct rfd_struct *rfds=p->rfd_top;
857 volatile struct rbd_struct *rbds;
858 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
859 for(i=0;i< (p->num_recv_buffs+4);i++)
861 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
862 printk("%04x:%04x ",rfds->status,rbds->status);
863 rfds = (struct rfd_struct *) make32(rfds->next);
865 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
866 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
868 old_at_least = at_least_one;
875 /**********************************************************
876 * handle 'Receiver went not ready'.
879 static void sun3_82586_rnr_int(struct net_device *dev)
881 struct priv *p = netdev_priv(dev);
883 dev->stats.rx_errors++;
885 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
886 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
888 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
890 alloc_rfa(dev,(char *)p->rfd_first);
891 /* maybe add a check here, before restarting the RU */
892 startrecv586(dev); /* restart RU */
894 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
898 /**********************************************************
899 * handle xmit - interrupt
902 static void sun3_82586_xmt_int(struct net_device *dev)
905 struct priv *p = netdev_priv(dev);
910 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
911 if(!(status & STAT_COMPL))
912 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
916 dev->stats.tx_packets++;
917 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
921 dev->stats.tx_errors++;
922 if(status & TCMD_LATECOLL) {
923 printk("%s: late collision detected.\n",dev->name);
924 dev->stats.collisions++;
926 else if(status & TCMD_NOCARRIER) {
927 dev->stats.tx_carrier_errors++;
928 printk("%s: no carrier detected.\n",dev->name);
930 else if(status & TCMD_LOSTCTS)
931 printk("%s: loss of CTS detected.\n",dev->name);
932 else if(status & TCMD_UNDERRUN) {
933 dev->stats.tx_fifo_errors++;
934 printk("%s: DMA underrun detected.\n",dev->name);
936 else if(status & TCMD_MAXCOLL) {
937 printk("%s: Max. collisions exceeded.\n",dev->name);
938 dev->stats.collisions += 16;
942 #if (NUM_XMIT_BUFFS > 1)
943 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
946 netif_wake_queue(dev);
949 /***********************************************************
950 * (re)start the receiver
953 static void startrecv586(struct net_device *dev)
955 struct priv *p = netdev_priv(dev);
958 WAIT_4_SCB_CMD_RUC();
959 p->scb->rfa_offset = make16(p->rfd_first);
960 p->scb->cmd_ruc = RUC_START;
961 sun3_attn586(); /* start cmd. */
962 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
965 static void sun3_82586_timeout(struct net_device *dev, unsigned int txqueue)
967 struct priv *p = netdev_priv(dev);
968 #ifndef NO_NOPCOMMANDS
969 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
971 netif_wake_queue(dev);
973 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
974 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);
976 p->scb->cmd_cuc = CUC_ABORT;
979 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
980 p->scb->cmd_cuc = CUC_START;
983 netif_trans_update(dev); /* prevent tx timeout */
989 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
990 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
991 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
993 sun3_82586_close(dev);
994 sun3_82586_open(dev);
996 netif_trans_update(dev); /* prevent tx timeout */
999 /******************************************************
1004 sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1007 #ifndef NO_NOPCOMMANDS
1010 struct priv *p = netdev_priv(dev);
1012 if(skb->len > XMIT_BUFF_SIZE)
1014 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1015 return NETDEV_TX_OK;
1018 netif_stop_queue(dev);
1020 #if(NUM_XMIT_BUFFS > 1)
1021 if(test_and_set_bit(0,(void *) &p->lock)) {
1022 printk("%s: Queue was locked\n",dev->name);
1023 return NETDEV_TX_BUSY;
1029 if (len < ETH_ZLEN) {
1030 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1034 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1036 #if (NUM_XMIT_BUFFS == 1)
1037 # ifdef NO_NOPCOMMANDS
1040 if(p->scb->cus & CU_ACTIVE)
1042 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1043 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1047 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1050 p->xmit_cmds[0]->cmd_status = 0;
1052 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1053 p->scb->cmd_cuc = CUC_RESUME;
1056 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1057 p->scb->cmd_cuc = CUC_START;
1064 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1066 if(p->xmit_cmds[0]->cmd_status)
1069 printk("%s: Can't start transmit-command.\n",dev->name);
1072 next_nop = (p->nop_point + 1) & 0x1;
1073 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1075 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1076 = make16((p->nop_cmds[next_nop]));
1077 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1079 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1080 p->nop_point = next_nop;
1084 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1085 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1088 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1089 /* linkpointer of xmit-command already points to next nop cmd */
1090 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1091 p->nop_cmds[next_nop]->cmd_status = 0;
1093 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1094 p->xmit_count = next_nop;
1097 unsigned long flags;
1098 local_irq_save(flags);
1099 if(p->xmit_count != p->xmit_last)
1100 netif_wake_queue(dev);
1102 local_irq_restore(flags);
1107 return NETDEV_TX_OK;
1110 /*******************************************
1111 * Someone wanna have the statistics
1114 static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1116 struct priv *p = netdev_priv(dev);
1117 unsigned short crc,aln,rsc,ovrn;
1119 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1120 p->scb->crc_errs = 0;
1121 aln = swab16(p->scb->aln_errs);
1122 p->scb->aln_errs = 0;
1123 rsc = swab16(p->scb->rsc_errs);
1124 p->scb->rsc_errs = 0;
1125 ovrn = swab16(p->scb->ovrn_errs);
1126 p->scb->ovrn_errs = 0;
1128 dev->stats.rx_crc_errors += crc;
1129 dev->stats.rx_fifo_errors += ovrn;
1130 dev->stats.rx_frame_errors += aln;
1131 dev->stats.rx_dropped += rsc;
1136 /********************************************************
1140 static void set_multicast_list(struct net_device *dev)
1142 netif_stop_queue(dev);
1148 netif_wake_queue(dev);
1153 * DUMP .. we expect a not running CMD unit and enough space
1155 void sun3_82586_dump(struct net_device *dev,void *ptr)
1157 struct priv *p = netdev_priv(dev);
1158 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1161 p->scb->cmd_cuc = CUC_ABORT;
1164 WAIT_4_SCB_CMD_RUC();
1166 dump_cmd->cmd_status = 0;
1167 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1168 dump_cmd->dump_offset = make16((dump_cmd + 1));
1169 dump_cmd->cmd_link = 0xffff;
1171 p->scb->cbl_offset = make16(dump_cmd);
1172 p->scb->cmd_cuc = CUC_START;
1174 WAIT_4_STAT_COMPL(dump_cmd);
1176 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1177 printk("%s: Can't get dump information.\n",dev->name);
1179 for(i=0;i<170;i++) {
1180 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);